Facility Management System

Abstract

To enable secure inactivation of a pathogen while taking safety to the human body into consideration by appropriate irradiation of light of an irradiation level sufficient for inactivating the pathogen according to the situation of the pathogen in a target region.SOLUTION: A facility management system includes: an ultraviolet irradiating source 12 for irradiating ultraviolet rays; an observation section 25 for observing an irradiated level of ultraviolet rays received by an irradiation object; and a control section 26 for irradiating ultraviolet rays from the ultraviolet irradiating source 12 when an irradiation start condition is established, and controlling an irradiation level and / or an irradiation period based on the irradiated level observed by the observation section 25 during the irradiation of ultraviolet rays. The control section 26 controls an irradiation level and / or an irradiation period so that an integrated irradiated level received by the irradiation object becomes a target level by irradiating ultraviolet rays from the ultraviolet irradiating source 12 every time when a predetermined time elapses when the irradiation start condition is not established, and performs control of stopping irradiation when an irradiation stop timing arrives during irradiation of ultraviolet rays.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a facility management system that irradiates light of a predetermined wavelength into a facility according to the usage status of facilities such as office buildings, inactivates pathogens present in the facility, and prevents infection with infectious diseases.

Background Art

[0002] In recent years, in order to prevent infection with various infectious diseases caused by pathogens such as pathogenic bacteria, wearing masks, maintaining a distance between people, finger hygiene such as handwashing, and disinfection of objects touched by hands have been recommended. As disinfectants, for example, ethyl alcohol, electrolyzed water containing hypochlorous acid, sodium hypochlorite, etc. are used.

[0003] On the other hand, a method of inactivating pathogens such as viruses and bacteria by irradiating ultraviolet rays is known. For example, there are those that use ultraviolet rays in a wavelength band including a wavelength of 254 nm or 265 nm, which is the absorption peak wavelength of the DNA (deoxyribonucleic acid) of the virus and is said to most efficiently inactivate pathogenic bacteria by irradiation. As a light source for the wavelength band including a wavelength of 254 nm, a low-pressure mercury lamp is used, and as a light source for the wavelength band including a wavelength of 264 nm, an ultraviolet LED is used.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Patent Document 2

Patent Document 3

Patent Document 4

Patent Document 5

Patent Document 6

[0005] However, ultraviolet light in the wavelength range including 254nm or 265nm, which is used to inactivate pathogens such as viruses and bacteria, is highly harmful to the human body, such as inducing skin cancer and cataracts, and therefore cannot be used in places where people are present.

[0006] On the other hand, in recent years, ultraviolet light in the 200-230 nm range, which has a low penetration depth into the human body (the depth to which ultraviolet light reaches the skin), has attracted attention. It has been reported that even repeated irradiation with ultraviolet light with a central wavelength of 222 nm does not induce skin cancer and is safe for human skin and eyes. Excimer lamps are used as the light source for this ultraviolet light.

[0007] Therefore, by irradiating target areas such as rooms in office buildings with ultraviolet light in the wavelength band including 222nm, which is safe for the human body, it is expected that pathogens will be inactivated, thereby suppressing infection from various infectious diseases.

[0008] Incidentally, when inactivating pathogens by irradiating them with ultraviolet light, it is necessary to control the ultraviolet light source so that the amount of ultraviolet light (energy) received by the irradiated surfaces, such as walls and floors within the target area, is equal to the amount of irradiation required to kill 99.9% of the virus, as determined by experiments.

[0009] On the other hand, even if ultraviolet light in the wavelength range including 222nm is safe for humans, continuously irradiating areas where people are present with sufficient ultraviolet light to meet the required dose is desirable in that it can completely inactivate pathogens. However, this could lead to excessive ultraviolet radiation, potentially raising safety concerns for humans. Furthermore, increased power consumption for ultraviolet irradiation would raise operating costs. Additionally, continuous exposure to ultraviolet light would accelerate the deterioration of equipment, fixtures, and interior materials such as walls and floors within the target area, reducing their lifespan.

[0010] Furthermore, the way pathogens adhere to target areas such as rooms in office buildings varies from place to place depending on usage conditions, including people coming and going, and the purpose of use. If the amount of ultraviolet irradiation is uniform, it will not be an appropriate amount for each location, making it inefficient.

[0011] Furthermore, as the period of use increases, light sources that emit ultraviolet light tend to gradually decrease in irradiation output due to degradation, which may lead to insufficient ultraviolet irradiation received by the target, potentially reducing the inactivation effect on pathogens.

[0012] The present invention aims to provide a facility management system that appropriately controls the amount of ultraviolet radiation (energy) received by the irradiated object, thereby reliably inactivating pathogens and preventing infection from infectious diseases, while taking into consideration safety for the human body, reduction of power consumption, deterioration of items and interior materials within the target area, and deterioration of the light source. [Means for solving the problem]

[0013] (Facility Management System 1) The present invention relates to a facility management system that irradiates a target area with light in a wavelength range that inactivates a predetermined pathogen, The device is characterized by having a control unit that controls the light irradiation level and / or irradiation period such that the cumulative irradiation level, obtained by integrating the light irradiation levels received by the target object within the target area over time, becomes a predetermined target level that inactivates the pathogen to a predetermined inactivation target.

[0014] Here, "inactivation" includes killing, reducing, shortening the lifespan of pathogens such as viruses and bacteria, suppressing their proliferation, weakening them, or reducing their ability to infect humans. Furthermore, "light irradiation level" is a concept that encompasses various expressions and indicators such as the amount of light irradiated, irradiation intensity, irradiation energy, and irradiation energy density per unit area or per unit time. Furthermore, "light exposure level" refers to the level of light received by the irradiated object within the target area as a result of light irradiation. That is, it is a concept that encompasses various expressions and indicators such as the amount of light received (or observed or calculated as) by the irradiated object, the light intensity, the light energy, and the light energy density per unit area or per unit time. Furthermore, "cumulative exposure level" refers to the level obtained by accumulating the exposure level received by the irradiated object over time. In addition, "inactivation target" is the target degree of inactivation, and therefore "inactivating to the inactivation target" means, for example, inactivating a predetermined pathogen to a target percentage (inactivation target). More specific examples include achieving 99.9% eradication.

[0015] (Facility Management System 2) Another embodiment of the present invention includes a light irradiation source that irradiates a target area with light in a wavelength band that inactivates a predetermined pathogen, An observation unit that observes the level of light received by an object within a target area by irradiating it with light from a light source, A control unit controls the irradiation level and / or irradiation period of light, which irradiates light from a light source when predetermined irradiation start conditions are met, and controls the irradiation level and / or irradiation period based on the irradiation level observed by the observation unit during light irradiation, so that the cumulative irradiation level obtained by integrating the irradiation levels over time becomes a predetermined target level sufficient to inactivate the pathogen to a predetermined inactivation target. It is characterized by having a feature.

[0016] (Control unit 1: Fixes the light irradiation level and controls the irradiation period) When a predetermined irradiation start condition is satisfied, the control unit starts irradiating light fixed at a predetermined irradiation level from the light irradiation source, determines the irradiation stop timing for stopping the light irradiation based on the irradiated level and the target level observed by the observation unit during the light irradiation, and performs control to stop the light irradiation when the irradiation stop timing arrives.

[0017] (Irradiation Stop Control 1 with Fixed Irradiation Level) During the light irradiation, when the integrated irradiated level obtained by time-integrating the irradiated level observed by the observation unit reaches the target level, the control unit determines that the irradiation stop timing has arrived and stops the light irradiation.

[0018] (Irradiation Stop Control 2 with Fixed Irradiation Level) The control unit divides the target level by the irradiated level observed by the observation unit at a predetermined timing immediately after starting the light irradiation to obtain the target irradiation period, and when the elapsed period since starting the light irradiation reaches the target irradiation period, determines that the irradiation stop timing has arrived and stops the light irradiation.

[0019] (Control Unit 2: Fix the Light Irradiation Period and Control the Irradiation Level) When a predetermined irradiation start condition is satisfied, the control unit starts irradiating light from the light irradiation source, fixed determines the target irradiated level received by the irradiation target based on the predetermined irradiation period and the target level, controls the irradiation level of the light irradiation source so that the irradiated level observed by the observation unit during the light irradiation becomes the target irradiated level, and when the elapsed period since starting the light irradiation fixed reaches the irradiation period, determines that the irradiation stop timing has arrived and performs control to stop the light irradiation.

[0020] (Control When the Irradiation Start Condition is not Satisfied) When the predetermined irradiation start condition is not satisfied, the control unit irradiates light from the light irradiation source every time a predetermined time elapses, and controls the light irradiation level and / or the irradiation period so that the integrated irradiated level received by the irradiation target becomes the target level.

[0021] (Setting and controlling target levels according to the intended use or infection risk) The control unit controls the light irradiation level and / or irradiation period so that the cumulative irradiation level received by the irradiated object reaches a predetermined target level set according to the intended use or the risk of infection of pathogens within the target area.

[0022] (Setting and controlling target levels divided into small regions) The control unit divides the target area into multiple sub-regions according to their intended use, and controls the light irradiation level and / or irradiation period using a light irradiation source provided for each sub-region so that the cumulative irradiation level received by each sub-region reaches a predetermined target level set according to the intended use of that sub-region and / or the infection risk of the pathogen.

[0023] (Control through multi-point observation of irradiation level) The observation unit observes the radiation level received by the irradiated object at multiple points within the target area. The control unit controls the light irradiation level and / or irradiation period so that the cumulative irradiation level received by the irradiated object reaches the target level, based on the minimum or average value of the irradiation levels observed at multiple points by the observation unit.

[0024] (Light irradiation control according to the usage status of the target area) The observation unit further observes the usage status of the target area, When the utilization status of the target area observed by the observation unit satisfies predetermined irradiation start conditions, the control unit starts irradiating light from the light source and controls the irradiation level and / or irradiation period so that the cumulative irradiation level received by the irradiated object reaches the target level.

[0025] (Light irradiation control based on people entering and leaving) The observation unit monitors the entry and exit of people into the target area as part of the usage status of the target area. The control unit, when a person enters the target area and / or leaves the target area, irradiates light from the light source and controls the light irradiation level and / or irradiation period so that the cumulative irradiation level received by the irradiated object reaches the target level.

[0026] (Light irradiation control according to the level of crowding) The observation unit observes the degree of human congestion within the target area as a measure of its usage status. The control unit controls the light irradiation level and / or irradiation period so that the cumulative irradiation level received by the irradiated object reaches a predetermined target level set according to the degree of crowding observed by the observation unit.

[0027] (Observation of usage status using access control) The observation unit monitors the usage status of the target area based on control information from the electric locks on the doors installed at the entrances and exits of the target area.

[0028] (Observation of usage status using motion sensors) The observation unit monitors the usage status of the target area based on detection information from motion sensors installed in the target area.

[0029] (Observation of usage patterns using mobile device information) The observation unit monitors the usage status of the target area based on location information from a mobile device held by a person who has entered the target area, or on a predetermined communication signal.

[0030] (Observation of usage status using operational information of office automation equipment) The observation unit monitors the usage status of the target area based on operational information from equipment installed in the target area.

[0031] (Illuminance sensor) The observation unit is equipped with an illuminance sensor that measures light intensity. The illuminance sensor is, Battery power and A photodetector that receives light from a light source and converts it into an electrical signal, A processing unit that processes the electrical signal output from the light-receiving element and outputs a signal including illuminance, A communication unit transmits a signal including illuminance output from the processing unit to the control unit, It is equipped with.

[0032] (Monitoring of light exposure conditions) The facility management system further, It is equipped with a monitor unit that indicates the light irradiation status within the target area, The monitoring unit provides information on the light irradiation status within the target area based on the level of light received by the irradiated object within the target area observed by the observation unit.

[0033] (Monitoring the irradiation status in small areas) The monitor unit divides the target area into smaller regions according to its intended use and displays the light irradiation status.

[0034] (Notification of light irradiation conditions using map information) The monitor unit uses map information indicating the area of ​​light illumination to inform the user of the light irradiation status.

[0035] (Notification of guidance information according to light irradiation conditions) The monitoring unit provides guidance information for the target area based on the light irradiation conditions observed within that area.

[0036] (Contents of the information provided) The monitoring unit provides guidance information indicating at least one of the following: the safety of the target area, whether the light irradiation in the target area is excessive or insufficient, whether the target area is prohibited from use, or whether the use of the target area is restricted.

[0037] (Ultraviolet irradiation with a wavelength of 222 nm) The light emitted from the light source onto the target area is ultraviolet light in a predetermined wavelength band, including a wavelength of 222 nm, excluding 254 nm and 264 nm. [Effects of the Invention]

[0038] (Effectiveness of facility management systems) According to the facility management system of the present invention, when irradiating a target area with light in a wavelength band that inactivates a predetermined virus or bacteria, the irradiation level and / or irradiation period are controlled so that the cumulative irradiation level (e.g., the cumulative amount of light energy) obtained by integrating the light irradiation level received by the irradiated object over time becomes a target level that inactivates (or is sufficient to inactivate) the pathogen to a predetermined inactivation target, for example, a target level that kills and inactivates 99.9% of the pathogen. This ensures that the necessary and sufficient light is irradiated to inactivate the pathogen attached to the irradiated object within the monitoring area, thereby reliably inactivating the pathogen and preventing infection from infectious diseases caused by various pathogens, while considering safety to the human body, saving power consumption, suppressing deterioration of items and interior materials within the target area, and deterioration of the light source.

[0039] (Control unit 1: Fixes the light irradiation level and controls the irradiation period.) Furthermore, the control unit starts irradiating light from the light source at a predetermined irradiation level when predetermined irradiation start conditions are met, determines an irradiation stop timing based on the irradiated level observed by the observation unit and the target level during irradiation, and controls the irradiation to stop when the irradiation stop timing arrives. By controlling the irradiation period so that the cumulative irradiated level received by the irradiated object reaches a predetermined target level, it is possible to reliably inactivate pathogens. In addition, since the irradiation level of light from the light source is fixed at a predetermined level, there is the advantage that the control of the light source only requires simple on / off control.

[0040] (Effect of irradiation stop control 1 with fixed irradiation level) Furthermore, as irradiation stop control when the irradiation level is fixed, the control unit can determine that the irradiation stop timing has arrived when the accumulated irradiation level, which is obtained by accumulating the irradiation level observed by the observation unit over time during light irradiation, reaches the target level, and stop the irradiation of light, thereby controlling the accumulated irradiation level received by the irradiated object to reach a predetermined target level.

[0041] (Effect of irradiation stop control 2 with fixed irradiation level) Furthermore, as irradiation stop control when the irradiation level is fixed, the control unit calculates the target irradiation period by dividing the target level by the irradiation level observed by the observation unit at a predetermined timing immediately after the start of light irradiation. When the elapsed time since the start of light irradiation reaches the target irradiation period, the control unit determines that the irradiation stop timing has arrived and stops the light irradiation, thereby controlling the system so that the cumulative irradiation level received by the irradiated object reaches a predetermined target level.

[0042] (Control unit 2: Fixed the light irradiation period and controls the irradiation level.) Furthermore, the control unit starts irradiating light from the light source when predetermined irradiation start conditions are met, fixed Based on the irradiation period and target level, the target irradiation level to be received by the irradiated object is determined, and the irradiation level of the light source is controlled so that the irradiation level observed by the observation unit during light irradiation becomes the target irradiation level, and the elapsed time since the start of light irradiation is fixed When the irradiation period is reached, the system determines that it is time to stop irradiation and controls the irradiation to stop the light. This allows the irradiation level to be controlled so that the cumulative irradiation level received by the target reaches the target level, thereby ensuring the reliable inactivation of pathogens.

[0043] (Effects of control when irradiation start conditions are not met) Furthermore, even if the predetermined irradiation start conditions are not met, for example, when the target area of ​​the facility is not in use at night or on holidays, the control unit periodically irradiates light from the light source at predetermined intervals, controlling the irradiation level and / or irradiation period so that the cumulative irradiation level received by the irradiated object reaches the target level, thereby enabling more reliable inactivation of pathogens.

[0044] (Setting and controlling target levels according to the intended use or infection risk) Furthermore, the control unit controls the light irradiation level and / or irradiation period so that the cumulative irradiation level received by the irradiated object reaches a predetermined target level set according to the intended use or the risk of infection of pathogens within the target area. This enables appropriate control of the light irradiation level and / or irradiation period received by the target area in accordance with the intended use or the risk of infection of pathogens within the target area.

[0045] (The effect of setting and controlling target levels divided into small regions) Furthermore, the control unit divides the target area into multiple sub-regions according to the purpose of use, and controls the light irradiation level using light sources provided for each sub-region so that the cumulative irradiation level received by each sub-region reaches a predetermined target level set according to the purpose of use and / or the infection risk of the pathogen. This makes it possible to appropriately and precisely control the light irradiation level for sub-regions, such as entrance areas, office areas, reception areas, and conference areas of a room that is the target area, according to the purpose of use and the infection risk.

[0046] (Effect of control through multi-point observation of irradiation levels) Furthermore, the control unit controls the light irradiation level and / or irradiation period based on the average value of the irradiation levels at multiple observation points, thereby controlling the light irradiation level and / or irradiation period to suppress variations in the light irradiation level at each observation point, and enabling inactivation of pathogens over almost the entire area. In addition, the control unit controls the light irradiation level and / or irradiation period based on the minimum value of the irradiation levels at multiple observation points, so that even if observation points other than the minimum value receive light irradiation at a level exceeding the target level, and there are variations in the light irradiation levels at each observation point, pathogens can be reliably inactivated over almost the entire area.

[0047] (Effects of light irradiation control according to the usage status of the target area) Furthermore, the control unit enables the inactivation of pathogens according to the usage status of the target area by starting light irradiation from the light source when the usage status of the target area observed by the observation unit satisfies predetermined irradiation start conditions.

[0048] (Effect of light irradiation control in response to people entering and leaving the area) Furthermore, since pathogens are introduced when a person enters the target area, and pathogens remain when a person leaves the target area, it is possible to control the level and / or duration of light irradiation to reliably inactivate newly introduced pathogens and pathogens remaining in the target area by irradiating light from a light source when a person enters the target area and / or when a person leaves the target area.

[0049] (The effect of controlling light irradiation according to the level of crowding) Furthermore, since the risk of infection by pathogens increases with the level of human congestion within the target area, the irradiation level and / or duration of light are controlled to reach a target level set according to the level of human congestion observed by the observation unit, thereby enabling the irradiation of light that inactivates pathogens according to the level of human congestion.

[0050] (Effects of using access control systems) Furthermore, the observation unit observes the usage status of the target area based on control information of the electric locks on the doors at the entrances and exits of the target area, which are controlled by access management. This allows for easy and convenient observation of, for example, the presence or absence of people and the degree of congestion within the target area, and enables control of the irradiation level and / or irradiation period of light used to inactivate pathogens according to the observation results.

[0051] (Effects of using motion sensors in usage) Furthermore, by observing the usage status of the target area based on detection information from motion sensors installed within the target area, it is possible to easily and simply observe, for example, the presence or absence of people and the degree of congestion within the target area, and to control the irradiation level and / or duration of light that inactivates pathogens according to the observation results.

[0052] (Effects of using mobile device information for usage data) Furthermore, by observing the usage status of the target area based on location information of mobile devices such as smartphones held by people within the target area, or predetermined communication signals, it is possible to easily and simply observe, for example, the presence or absence of people and the degree of congestion within the target area, and to control the irradiation level and / or irradiation period of light that inactivates pathogens according to the observation results. In addition, since the location information of mobile devices can be obtained from servers of external telecommunications companies that provide communication services for mobile devices such as smartphones, without the need to install dedicated equipment or facilities, the system's functions and configuration are simplified, and costs can be reduced.

[0053] (Effects of usage based on the operating status of office automation equipment) Furthermore, within the target area of ​​facilities such as office buildings, office automation equipment (OA equipment) such as personal computers, copiers, fax machines, and printers are installed and connected to a server via a local area network (LAN). By observing the usage status of the target area based on the operational information of the OA equipment acquired via the network, it is possible to easily and simply observe, for example, the presence or absence of people and the degree of congestion within the target area, and to control the appropriate light irradiation level and / or irradiation period according to the observation results. Moreover, operational information of OA equipment can be acquired without installing dedicated equipment or facilities such as sensors, simplifying the system's function and configuration and reducing costs. Operational information of equipment other than OA equipment, such as lighting equipment, can also be applied in the same way.

[0054] (Effect of the illuminance sensor) Furthermore, the observation unit is equipped with an illuminance sensor that observes the amount of light received by the target object. The illuminance sensor consists of a battery power supply, a light receiving element, a processing unit, and a communication unit. By placing it on the target object, such as a wall, floor, or desk, within the target area and observing the level of light received by the target object, it becomes possible to easily and simply observe the light irradiation conditions within the target area. In particular, when wireless communication is performed by the communication unit, it becomes even easier and simpler to place it at any location within the target area and observe the level of light received, without requiring any wiring work.

[0055] (Effects of monitoring light irradiation conditions) Furthermore, the facility management system is equipped with a monitor unit that informs the light irradiation status within a target area based on the light irradiation level received by the irradiated object within the target area observed by the observation unit. This allows the distribution and values ​​of light intensity and irradiation amount within the target area to be viewed, for example, on a monitor screen, even when the light irradiation is in a wavelength range invisible to the naked eye. This enables easy and convenient understanding of the light irradiation status and allows for appropriate operational management.

[0056] (Effect of monitoring irradiation conditions in small areas) Furthermore, the monitoring unit provides information on the light illumination status in sub-regions divided within the target area according to their intended use. For example, by dividing the target room into areas such as entrance / exit areas, office areas, reception areas, and conference areas, the light illumination status at that time can be viewed and checked on the monitor screen. This allows for easy and convenient understanding of the light illumination status when the target area is divided into sub-regions, enabling appropriate operational management.

[0057] (Effect of using map information to report light irradiation conditions) Furthermore, the monitoring unit uses map information such as a floor map indicating the area of ​​interest to easily and readily grasp the light irradiation conditions within the area, enabling appropriate operational management.

[0058] (Effect of providing guidance information according to light irradiation conditions) Furthermore, the monitoring unit provides guidance information about the target area based on the light irradiation status within the target area, such as information regarding the safety of the target area, whether the light irradiation in the target area is excessive or insufficient, whether the target area is prohibited from use, or whether the use of the target area is restricted. This enables quick and appropriate action in response to the light irradiation status.

[0059] (Effects of UV irradiation with a wavelength of 222 nm) Furthermore, the light emitted from the light source to the target area is ultraviolet light within a predetermined wavelength range that includes 222nm, a wavelength safe for the human body, within the 200-280nm ultraviolet C wave (UV-C) wavelength band, excluding wavelengths of 254nm or 264nm, which are not safe for the human body. This ensures that the light is safe for people to be exposed to while reliably inactivating pathogens. [Brief explanation of the drawing]

[0060] [Figure 1] This is an explanatory diagram showing an overview of the facility management system. [Figure 2] This is an explanatory diagram showing an embodiment of an ultraviolet irradiation source. [Figure 3] This is an explanatory diagram showing the structure of an excimer lamp. [Figure 4] This is an explanatory diagram showing the structure of a lamp unit equipped with an excimer lamp. [Figure 5] Figure 1 is a block diagram showing an embodiment of the illuminance sensor and relay device. [Figure 6] This is an explanatory diagram showing a first embodiment of the control unit installed in the facility management device shown in Figure 1. [Figure 7] This is an explanatory diagram showing a second embodiment of the control unit installed in the facility management device shown in Figure 1. [Figure 8] This is an explanatory diagram showing a third embodiment of the control unit installed in the facility management device shown in Figure 1. [Figure 9] Figure 1 is an explanatory diagram of the ultraviolet irradiation map screen displayed on the facility management device. [Figure 10] This is an explanatory diagram showing the arrangement of the ultraviolet irradiation source and illuminance sensor in the target area corresponding to Figure 9. [Figure 11] This is an explanatory diagram of a control table that sets the infection risk level and target level corresponding to the target area, using the second embodiment of the control unit as an example. [Figure 12] This is a time chart showing the timing of irradiation control corresponding to the entry and exit of people, categorized by mode. [Figure 13] This is a flowchart illustrating the general process of controlling ultraviolet irradiation. [Figure 14] This flowchart shows the details of the ultraviolet irradiation control corresponding to the first embodiment in Figure 6, as performed in step S4 of Figure 13. [Figure 15] This flowchart shows the details of the ultraviolet irradiation control corresponding to the second embodiment in Figure 7, as performed in step S4 of Figure 13. [Figure 16] This flowchart shows the details of the ultraviolet irradiation control corresponding to the third embodiment in Figure 8, as described in step S4 of Figure 13. [Figure 17] This is a flowchart illustrating the monitor control process performed by the monitoring unit. [Figure 18] This is an explanatory diagram illustrating the general structure of a facility management system that uses motion sensors to monitor the usage status of a target area. [Figure 19] This is an explanatory diagram illustrating the general structure of a facility management system that monitors the usage status of a target area using location information from mobile devices. [Figure 20] This is an explanatory diagram illustrating the general structure of a facility management system that observes the usage status of a target area using short-range wireless signals from a mobile device. [Figure 21] This is an explanatory diagram illustrating the general structure of a facility management system that monitors the usage status of a target area based on the operating information of office automation equipment. [Modes for carrying out the invention]

[0061] Embodiments of the facility management system according to the present invention will be described in detail below with reference to the drawings. However, the present invention is not limited to the embodiments described below.

[0062] [Basic Concepts of the Embodiment] The embodiment, in general terms, relates to a facility management system, which is a system for appropriately operating and managing facilities used by people. Here, "facility" refers to a structure such as a building that is the subject of management, and is a concept that includes, for example, office buildings, commercial facilities such as department stores and supermarkets, and public facilities such as schools and libraries.

[0063] The facility management system of this embodiment consists of a light irradiation source, an observation unit, and a control unit.

[0064] A "light source" is a device that irradiates a target area of ​​a facility with light in a wavelength range that inactivates a specified pathogen. Here, the "target area" is the area to which light in the wavelength range that inactivates pathogens is irradiated, and is a concept that includes, for example, rooms, corridors, and stairwells inside a building. Furthermore, "irradiating the target area with light" means irradiating light to at least a part of the target area, for example, any room, or to a specified irradiation target within the target area, for example, an object to which pathogens are likely to adhere. Furthermore, "light in a wavelength range that inactivates a specified pathogen" is a concept that includes ultraviolet light in a specified wavelength range belonging to ultraviolet C (UV-C) with wavelengths of 100 to 280 nm, specifically ultraviolet light with a wavelength of 222 nm, which has a high inactivation effect on pathogens that are safe for humans, and includes ultraviolet light in a specified wavelength range excluding wavelengths of 254 nm and 264 nm, which are dangerous to humans.

[0065] Here's a brief explanation of ultraviolet (UV) radiation. UV radiation is classified into three types based on wavelength: UV-A (315-400 nm), UV-B (280-315 nm), and UV-C (100-280 nm). UV-C has very strong germicidal properties and can inactivate pathogens, but it is also known to be harmful to humans. UV-C radiation in sunlight is absorbed by the ozone layer and does not reach the Earth's surface.

[0066] Such ultraviolet C (UV-C) light is emitted using sources such as low-pressure mercury lamps or ultraviolet LEDs. Low-pressure mercury lamps emit ultraviolet light in the wavelength range including 254 nm, while ultraviolet LEDs emit ultraviolet light in the wavelength range including 265 nm. Ultraviolet light with a wavelength of 254 nm from low-pressure mercury lamps or a wavelength of 265 nm from ultraviolet LEDs matches the absorption peak wavelength of viral DNA (deoxyribonucleic acid), resulting in a high virus inactivation effect. However, it is harmful to the human body and cannot be emitted in areas where people are present.

[0067] In contrast, the ultraviolet light irradiated in this embodiment, specifically in the wavelength band including 222nm, for example, the 200-230nm wavelength band, uses an excimer lamp as the light source. It has been demonstrated that 222nm wavelength does not induce skin cancer even with repeated irradiation because it has a low penetration depth into the human body (the depth to which incident ultraviolet light reaches the skin). It is also safe for human skin and eyes, and its inactivation effect on pathogens is reported to be equivalent to that of ultraviolet light in the wavelength band including 254nm or 265nm. As an example, the light source irradiates ultraviolet light in a predetermined wavelength band that includes 222nm, excluding the dangerous wavelengths of 254nm and 264nm. In the following description, it may be referred to as "ultraviolet light in the 222nm band." Also, in the case of ultraviolet light including wavelengths of 254nm and 265nm, it may be referred to as "ultraviolet light in the 254(265)nm band."

[0068] Furthermore, the pathogens targeted for inactivation by light irradiation from a light source are viruses and bacteria. While the viruses are arbitrary, examples include coronavirus, rotavirus, adenovirus, poliovirus, and influenza virus. Examples of bacteria include Shigella, Vibrio cholerae, Legionella, Pseudomonas aeruginosa, Salmonella typhi, Salmonella paratyphi, and Salmonella typhimurium. In addition to these, any viruses and bacteria that can be inactivated by light irradiation are also targeted.

[0069] The "observation unit" observes the level of light received by an object within a target area by irradiating it with light from a light source. Observation of the light level is optional, but for example, an illuminance sensor that detects illuminance can be used.

[0070] Here, "irradiation level" refers, for example, to the illuminance of light received by an irradiated object within the target area. "Illuminance" refers to the intensity of light per unit area on a predetermined irradiated surface, such as ultraviolet light in the 222 nm band, emitted from a light source into the target area, and is a concept that includes ultraviolet illuminance (UV illuminance). Although the unit of illuminance is [mW / cm2], since the intensity of ultraviolet light required to inactivate pathogens is small, the unit of illuminance used is [μW / cm2].

[0071] The "control unit" is responsible for irradiating light from a light source when predetermined irradiation start conditions are met, and for controlling the irradiation level and / or irradiation period from the light source based on the irradiation level observed by the observation unit during light irradiation, so that the cumulative irradiation level obtained by accumulating the irradiation level over time becomes a predetermined target level that inactivates (or is sufficient to inactivate) the pathogen to a predetermined inactivation target.

[0072] Here, "the predetermined irradiation start conditions are met" means when any start conditions that require light irradiation to inactivate pathogens within the target area are met, for example, when predetermined start conditions based on the usage status of the target area are met, specifically when a person enters the target area and / or when a person leaves the target area.

[0073] Furthermore, "target level" refers to the cumulative irradiation level required to inactivate the target pathogen to a predetermined inactivation target. For example, it refers to the cumulative irradiation level required to inactivate a predetermined percentage (inactivation target) of a given pathogen, or, more specifically, the cumulative irradiation level required to kill 99.9% of them. As an example, the target level is irradiated at an illuminance [μW / cm2] that corresponds to the irradiation level. period [μW·sec / cm2] is the cumulative light intensity obtained by accumulating [sec] units, and it includes the concept of integrating illuminance. Furthermore, since illuminance [μW / cm2] is expressed in joules (J) as [μJ / s / cm2], the cumulative light intensity that reaches the target level is [μJ / cm2], and this value is known to have been obtained from ultraviolet irradiation experiments on various pathogens. For example, the target level to kill 99.9% of influenza viruses is 6,600 [μW·sec / cm2].

[0074] The target level in the control unit is set, for example, according to the intended use within the target area, and also set for each sub-region within the target area that is divided according to its intended use, and further set according to the risk of viral or bacterial infection within the target area.

[0075] Furthermore, the inactivation target that determines the target level is arbitrary and is not limited to an inactivation target that kills 99.9% of the pathogen. Rather, a target level corresponding to a higher inactivation target or a lower inactivation target can be set using 99.9% as the baseline.

[0076] Furthermore, even if the predetermined irradiation start conditions are not met, the control unit irradiates light from the light source at predetermined intervals, controlling the light irradiation level and / or irradiation period so that the cumulative irradiation level received by the irradiated object reaches the target level.

[0077] Furthermore, the control unit observes the radiation level received by the target object at multiple points within the target area using the observation unit, and controls the light irradiation level and / or irradiation period based on the minimum or average value of the radiation levels at multiple points, so that the cumulative radiation level received by the target object reaches the target level.

[0078] Furthermore, the control unit controls the light irradiation level and / or irradiation period so that it reaches a predetermined target level set according to the congestion level observed by the observation unit. For example, when the congestion level is high, the target level is set to a high value, and when the congestion level is low, the target level is set to a low value.

[0079] The control of the control unit can be divided into two methods: one that fixes the irradiation level of the light emitted from the light source to a constant level, and another that varies the irradiation level. In the case of the method that fixes the irradiation level, the control unit starts irradiating light at a predetermined irradiation level from the light source when predetermined irradiation start conditions are met, determines the irradiation stop timing to stop the irradiation based on the irradiated level observed during the irradiation and the target level, and stops the irradiation when the irradiation stop timing arrives, thereby controlling the irradiation period so that the integrated irradiated level, obtained by accumulating the irradiated level over time, becomes the target level.

[0080] In this case, there are two types of irradiation stop control: a first and a second. The first irradiation stop control stops the irradiation when the accumulated irradiation level, which is calculated by accumulating the irradiation level observed by the observation unit over time during irradiation, reaches the target level, and it is determined that the irradiation stop timing has arrived. The second irradiation stop control calculates the target irradiation period by dividing the target level by the irradiation level observed immediately after the start of irradiation, and when the elapsed time from the start of irradiation reaches the target irradiation period, it is determined that the irradiation stop timing has arrived, and the irradiation stops.

[0081] Furthermore, if the control unit is configured to vary the light irradiation level, fixed Based on the irradiation period and target level, for example ba solid The system determines the target radiation level to be received by the target object by dividing the target level by the fixed irradiation period. During light irradiation, the irradiation level is controlled so that the radiation level observed by the observation unit matches the target radiation level. When the elapsed time from the start of irradiation reaches the fixed irradiation period, it is determined that the irradiation stop timing has arrived, and the light irradiation is stopped.

[0082] Furthermore, the observation unit observes the usage status within the target area, and the control unit starts irradiation from the light source when the usage status of the target area observed by the observation unit satisfies predetermined irradiation start conditions. Here, the observation of the usage status within the target area by the observation unit is optional, but for example, the usage status of the target area is observed using access control information, motion sensor detection information, mobile terminal location information and communication information, or office automation equipment operation information, etc., and the light irradiation level and / or irradiation period are controlled to reach a target level according to the presence or absence of people and the degree of congestion within the target area.

[0083] Furthermore, the facility management system of this embodiment includes a monitoring unit. Here, the "monitoring unit" is a unit that notifies the user of the light irradiation status within the target area by sound or display, based on the light irradiation level within the target area observed by the observation unit, such as illuminance. The monitoring unit also notifies the user of the light irradiation status observed within the target area, which has been divided into smaller areas according to the purpose of use, and preferably uses map information indicating the target area to notify the user of the light irradiation status observed within the target area. In addition, based on the light irradiation status observed within the target area, the monitoring unit provides guidance information for the target area, such as information indicating the safety of the target area, whether the light irradiation in the target area is excessive or insufficient, whether the target area is prohibited from use, or whether the use of the target area is restricted.

[0084] The following describes a specific embodiment. In the embodiment described below, the "target area" is a "room," the "light source" is an "excimer lamp-based ultraviolet light source," and the "light emitted by the light source" is "ultraviolet light in the 222nm band (ultraviolet light safe for the human body)."

[0085] [Specific details of the embodiment] The specific details of the embodiment will be explained as follows: a. Overview of the facility management system b. Access Control Department c. UV radiation source c1. Ultraviolet irradiation source using an excimer lamp c2. Structure and operation of an excimer lamp c3. Structure of the lamp unit c4. Lamp drive circuit section c5. Dimming control of excimer lamps d. Illumination sensor and relay device e. Control Unit e1. First embodiment of the control unit e2. Second embodiment of the control unit e3. Third embodiment of the control unit f. Specific examples of UV irradiation control g. Control operation of ultraviolet irradiation g1. Overview of control operation g2. Control operation of ultraviolet irradiation according to the first embodiment g3. Control operation of ultraviolet irradiation according to the second embodiment g4. Control operation of ultraviolet irradiation according to the third embodiment h. Monitor section i. Facility management system that monitors usage status using motion sensors j. Facility management system that monitors usage status using location information from mobile devices j1. Generation of observation results based on GPS location information j2. Generation of observation results using other position detection methods k. Facility management system that monitors usage status using short-range wireless communication of mobile devices l. Facility management system that monitors usage status based on operational information of office automation equipment. m. Modified form of the present invention

[0086] [a. Overview of the facility management system] Figure 1 is an explanatory diagram illustrating the general outline of a facility management system installed in a building. An office building is used as an example of the target facility, and the target area is shown as rooms A1, A2, ..., An on a certain floor.

[0087] The facility management system of this embodiment consists of an ultraviolet irradiation source 12 that functions as a light irradiation source and a facility management device 24. The ultraviolet irradiation source 12 is connected to the facility management device 24 by a transmission line 36 and irradiates rooms A1 to An with light in a predetermined wavelength band that inactivates predetermined pathogens. Its function and configuration are arbitrary, but as an example, it irradiates ultraviolet light in the 222nm band that is safe for the human body, for example, ultraviolet light in the 200-230nm range. The facility management device 24 is a computer circuit equipped with a CPU, memory, various input / output functions, a display, etc., and is provided with an observation unit 25, a control unit 26, and a monitor unit 28 as functions realized by the execution of a program.

[0088] The observation unit 25 observes the level of ultraviolet light received by the irradiated object from the ultraviolet light source 12 into rooms A1 to An. Its function and configuration are arbitrary, but as an example, it receives illuminance detection signals transmitted by illuminance sensors 20, which are placed at any irradiation position in rooms A1 to An and connected to the facility management device 24 via a transmission line 34, via a relay device 22, and determines the level of irradiation (illuminance) received by the irradiated object in rooms A1 to An. In this embodiment, one ultraviolet light source 12 is provided in each of rooms A1 to An, and multiple illuminance sensors 20 are provided in each of them.

[0089] The control unit 26 starts irradiating ultraviolet light from the ultraviolet irradiation source 12 when predetermined irradiation start conditions are met in rooms A1 to An, for example, when a person enters a room and / or when a person leaves a room. It controls the ultraviolet irradiation level so that the cumulative irradiation level, obtained by accumulating the irradiation level observed by the observation unit 25 over time, reaches a predetermined inactivation target for pathogens, for example, a target level that kills 99.9% of pathogens. The control of the control unit 26 is divided into control that fixes the ultraviolet irradiation level from the ultraviolet irradiation source 12 (first and second embodiments of the control unit 26) and control that varies the irradiation level (third embodiment of the control unit 26), the details of which will be described later.

[0090] Here, the control unit 26 irradiates ultraviolet light from the ultraviolet irradiation source 12 when predetermined irradiation start conditions are met in rooms A1 to An. The meeting of these irradiation start conditions is determined according to the usage status of rooms A1 to An, which constitute the target area. Therefore, the observation unit 25 observes not only the irradiation level received by the irradiation targets in rooms A1 to An, but also their usage status. The functions and configuration of the observation unit 25 that observes the usage status of rooms A1 to An are arbitrary, but as an example, it utilizes the functions of the access control unit installed in the facility.

[0091] The monitoring unit 28 notifies the irradiation status by sound and display based on the ultraviolet radiation exposure level received by the irradiated object in rooms A1 to An, which constitute the target area, as observed by the observation unit 25.

[0092] [b. Access Control Department] The functions and configuration of the access control unit used by the observation unit 25, which monitors the usage status of the target area within the facility, are arbitrary, but as an example, it consists of an electric lock 14, a card reader 16, an open / close detector 18, an access control device 30, a central device 31, and a client device 32. Although not shown in the figure, card readers for exit are provided on the interior side of the doors 10 of rooms A1 to An. Also, in Figure 1, rooms A1 to An show the outside of the room with the door 10 on the left side, and the inside of the room with the door 10 on the right side, which is broken open.

[0093] The electric lock 14, card reader 16, and open / close detector 18 are connected to the access control device 30 by transmission lines 42, 38, and 40. The access control device 30 is located, for example, on each floor of the building. The central device 31 and client devices 32 are located in the building's disaster prevention center, etc., and are interconnected, for example, by a LAN line 35, and are also connected to the access control devices 30 on each floor.

[0094] Access control by the access control unit is as follows: A card reader 16 installed on the outside of door 10 reads the magnetic card or contactless IC card carried by the person in question and compares it with a pre-registered person ID. If authentication is successful based on a match, it sends an authentication signal to the access control device 30.

[0095] When the access control device 30 receives an authentication signal from the card reader 16, it outputs a control signal to the electric lock 14 of the door 10 in the corresponding room to unlock it and allow entry. When leaving the room, a card reader (not shown) installed on the interior side near the door 10 reads the magnetic card or contactless IC card carried by the person and compares it with a pre-registered person ID. If the matching is successful, an authentication signal is sent to the access control device 30, which outputs a control signal to the electric lock 14 of the door 10 in the corresponding room to unlock it and allow exit.

[0096] The central device 31 is, for example, a personal computer with an LCD display that displays management information such as a building floor map. The client device 32 is, for example, a personal computer with an LCD display that is connected to the access control device 30 via a LAN line 35 which serves as a transmission path, and performs various setting processes such as registering, deleting, and searching the history of user IDs that are compatible with magnetic cards and contactless IC cards in communication with the card reader 16 via the access control device 30.

[0097] The client device 32 controls the electric lock 14 on the door 10 to manage the entry and exit of people, thereby generating target person information as control information indicating the people inside rooms A1 to An. The observation unit 25 of the facility management device 24 obtains observation results of the usage status of rooms A1 to An, such as the presence or absence of people and the degree of crowding, based on the target person information generated by the client device 32. Here, the degree of crowding is a value obtained by dividing the number of people in each room, for example, by the capacity of each room (maximum number of people in the room), and is a concept that includes overcrowding.

[0098] The control unit 26 of the facility management device 24 determines whether the irradiation start conditions corresponding to the usage status of rooms A1 to An have been met, based on the target person information acquired from the client device 32. For example, when a person enters rooms A1 to An, and / or when a person leaves rooms A1 to An, it determines that the irradiation start conditions corresponding to the usage status have been met, and controls the irradiation of ultraviolet light so that the cumulative irradiation level received by the target reaches the target level for inactivating pathogens.

[0099] The monitoring unit 28 of the facility management device 24 is the observation unit 2 5The system displays the ultraviolet radiation status within rooms A1 to An, as obtained from observation results, on a screen display. For example, it displays color coding corresponding to a pre-set target level or the observed radiation level on a map information such as a floor map of rooms A1 to An. Furthermore, since multiple illuminance sensors 20 are placed in rooms A1 to An, the system displays color coding corresponding to the irradiation status of each divided area determined by the arrangement of the illuminance sensors 20.

[0100] Furthermore, the monitor unit 28 provides guidance information corresponding to the ultraviolet irradiation status in rooms A1 to An, based on the irradiation status, for example, the irradiation level, via display on the screen or by sound. For example, if control is being performed to achieve the target level in rooms A1 to An, it outputs guidance information indicating that rooms A1 to An are safe from pathogens. If the ultraviolet irradiation level is insufficient or excessive for any reason, it outputs guidance information indicating the excess or deficiency, or guidance information indicating that use is prohibited or restricted.

[0101] [c. Ultraviolet irradiation source] Next, embodiments of the ultraviolet irradiation source will be described in more detail with reference to Figures 2 to 4. The ultraviolet irradiation source 12 irradiates ultraviolet light in a predetermined wavelength band that inactivates pathogens. Its function and configuration are arbitrary, but it irradiates ultraviolet light in a predetermined wavelength band belonging to ultraviolet C waves (UV-C) with wavelengths of 100 to 280 nm. For example, it irradiates ultraviolet light in the 222 nm band (ultraviolet light from 200 to 230 nm, including the 222 nm band).

[0102] (c1. Ultraviolet irradiation source using an excimer lamp) Figure 2 shows an embodiment of an ultraviolet irradiation source 12 using an excimer lamp, which irradiates ultraviolet light in the 222 nm wavelength band. Its function and configuration are arbitrary, but for example, it consists of a drive circuit section 46 and a lamp unit 48. The drive circuit section 46 is provided with a dimming control section 50, a commercial AC power source 52, an AC / DC converter 54, and a high-frequency oscillator 56, and the lamp unit 48 is arranged with, for example, four excimer lamps 60.

[0103] (c2. Structure and operation of excimer lamps) The excimer lamp 60 is a double-walled quartz glass tube consisting of an outer tube 62 and an inner tube 64, which are closed at both ends and integrated, as shown in the cross-sectional view of Figure 3(A) showing the AA cross-section of Figure 3(B) and the cross-sectional view of Figure 3(B) showing the BB cross-section of Figure 3(A). A metal electrode 68 is placed inside the inner tube 64, and a metal mesh electrode 66 is placed outside the outer tube 62. The quartz glass tube is filled with a predetermined discharge gas.

[0104] When a high-frequency high voltage is applied from the drive circuit 46 between the metal mesh electrode 66 and the metal electrode 68 of the excimer lamp 60, numerous thin, wire-like discharge plasmas (called "dielectric barrier discharges") are generated between the electrodes (between the metal mesh electrode 66 and the metal electrode 68) that are sandwiched between two dielectrics consisting of an outer tube 62 and an inner tube 64. These plasma discharges contain high-energy electrons and have the characteristic of disappearing instantaneously. This plasma discharge excites the atoms of the discharge gas, causing them to instantaneously enter an excimer state (a state in which electron-excited atoms and molecules form excited dimers with other atoms and molecules). When returning from this excimer state to the original state (ground state), the lamp emits light with a wavelength specific to the excimer state (excimer emission).

[0105] The emission wavelength of the excimer lamp 60 can be set by the discharge gas it is filled with. By using a noble gas or a mixture of a noble gas and a halogen gas as the discharge gas, excimer light with different wavelengths can be emitted. For example, when argon (Ar), krypton (Kr), and xenon (Xe) are used as the noble gases, an excimer lamp 60 with wavelengths of 126 nm, 146 nm, and 172 nm can be obtained. Furthermore, when KrCl and XeCl, which are mixtures of these noble gases and a halogen (chlorine), are used as the discharge gases, an excimer lamp 60 with wavelengths of 222 nm and 308 nm can be obtained.

[0106] Of these, an excimer lamp 60 with a wavelength of 222 nm using KrCl as the discharge gas is used in the lamp unit 48 of the ultraviolet irradiation source 12 in this embodiment. The length, tube diameter, number, etc. of the excimer lamps 60 installed in the lamp unit 48 are arbitrary.

[0107] (c3. Structure of the lamp unit) As shown in the cross-sectional view in Figure 4(A) and the plan view from below in Figure 4(B), the lamp unit 48 of this embodiment irradiates ultraviolet light in the 222 nm band by the emission of light from, for example, four excimer lamps 60. Its structure and type are arbitrary, but for example, four excimer lamps 60 are arranged on the lower side of a cooling block 76 placed inside a box-shaped lamp cover 74, with their upper halves tightly fixed in place. The cooling block 76 is equipped with multiple cooling fins facing upwards, and the excimer lamps 60 are cooled by air. Alternatively, a liquid cooling system in which a cooling medium is recirculated to the cooling block 76 may also be used.

[0108] A quartz window 80 is positioned on the underside of the lamp cover 74, and ultraviolet light in the 222nm band is irradiated to the outside as excimer light through the quartz window 80. Mirrors 78 are arranged in a V-shape between the four excimer lamps 60 and at each end, effectively extracting light from the excimer lamps 60 and homogenizing the radiant intensity distribution on the window surface of the quartz window 80. The lamp cover 74, which houses the cooling block 76, excimer lamps 60 and mirrors 78, is filled with nitrogen gas. Nitrogen gas does not absorb ultraviolet light with a wavelength of 222nm, reducing the residual oxygen concentration inside the lamp cover 74 and preventing oxidation of the lamp electrodes and mirrors 78. A wavelength band filter (not shown) is also provided in the quartz window 80, which irradiates ultraviolet light in the 222nm band with a wavelength band of, for example, 200-230nm.

[0109] (c4. Lamp drive circuit section) As shown in Figure 2, the four excimer lamps 60 installed in the lamp unit 48 are connected in parallel and emit ultraviolet light in the 222 nm band.

[0110] The drive circuit section 46 of the lamp unit 48 consists of a commercial AC power supply 52, an AC / DC converter 54, a high-frequency oscillator 56, and a dimming control section 50. The AC / DC converter 54 receives AC power from, for example, a commercial AC 100V power supply 52, converts it to DC power of a predetermined DC voltage, and outputs it. For example, a switching regulator capable of constant voltage control and constant power control is used.

[0111] The high-frequency oscillator 56 receives a DC power supply from the AC / DC converter 54 and oscillates at a predetermined frequency. The high-frequency high voltage is applied in parallel to four excimer lamps 60, causing 222nm band ultraviolet light to be emitted by excimer emission.

[0112] (c5. Dimming control of excimer lamps) The dimming control unit 50 can adjust the on / off state of the excimer lamp 60 and the light irradiation level (emission level) as needed. The adjustment of the irradiation level of the excimer lamp 60 is arbitrary, but for example, it can be done by changing the amount of DC power supplied from the AC / DC converter 54 to the high-frequency oscillator 56, or by changing the oscillation frequency of the high-frequency oscillator 56.

[0113] To stabilize the circuit operation, the oscillation frequency of the high-frequency oscillator 56 is kept constant, and the irradiation level of the excimer lamp 60 is adjusted by changing the amount of DC power supplied from the AC / DC converter 54 to the high-frequency oscillator 56. Specifically, the on-duty cycle of the PWM control (pulse width control) in the switching regulator constituting the AC / DC converter 54 is changed by control from the dimming control unit 50, thereby changing the amount of DC power supplied to the high-frequency oscillator 56 and adjusting the irradiation level of the excimer lamp 60. Alternatively, the irradiation level may be changed by switching the number of emitting excimer lamps 60.

[0114] [d. Illuminance sensor and relay device] Next, the embodiment of the illuminance sensor and relay device shown in Figure 1 will be described in more detail. Figure 5 is an explanatory diagram showing the functional configuration of the illuminance sensor 20 and the relay device 22. The illuminance sensor 20 is placed at any location in the target area of ​​the room, for example, on items such as equipment and fixtures installed in the room, on the floor, on the walls, etc., and detects the illuminance of ultraviolet light irradiated from the ultraviolet light source 12 as the irradiation level. Its function, configuration, and type are arbitrary, but as an example, it consists of an ultraviolet light receiving unit 82, a sensor control unit 84, and a communication unit 86 connected to an antenna 88.

[0115] The ultraviolet light receiving unit 82 receives ultraviolet light in the 222 nm band and converts it into an electrical signal. For example, a photodiode or phototransistor with sensitivity to ultraviolet C waves with wavelengths of 100 to 280 nm is used. The sensor control unit 84 processes the received signal output from the ultraviolet light receiving unit 82 to detect the level of ultraviolet light exposure and outputs it to the communication unit 86.

[0116] The communication unit 86 generates a detection signal including the detected illumination level and sensor ID, and transmits it to the relay device 22 using, for example, short-range wireless communication in the 920 MHz band. The illuminance sensor 20 is powered by a battery (not shown) and is guaranteed to have a battery life of, for example, more than 10 years.

[0117] The relay device 22 receives the detection signal transmitted from the illuminance sensor 20 and transmits the detection signal, including the detected irradiation level and sensor ID, to the facility management device 24 shown in Figure 1. Its function and configuration are arbitrary, but for example, it consists of a communication unit 92 connected to an antenna 90, a relay control unit 94, and a transmission unit 96.

[0118] The communication unit 92 receives a detection signal using the 920MHz band transmitted from the illuminance sensor 20 and outputs it to the relay control unit 94. The relay control unit 94 activates the detection signal if the sensor ID of the received detection signal matches a pre-registered sensor ID, and outputs the irradiated level and sensor ID obtained from the activated detection signal to the transmission unit 96. The transmission unit 96 generates a detection signal including the irradiated level and sensor ID output from the relay control unit 94 and transmits it to the facility management device 24 in Figure 1 using a known transmission method.

[0119] In addition to using a wireless connection, the connection between the ultraviolet sensor 20 and the relay device 22 may also be made by a signal line, or the ultraviolet sensor 20 may be directly connected to the facility management device 24 by a signal line without providing a relay device.

[0120] [e. Control Unit] Next, an embodiment of the control unit installed in the facility management device shown in Figure 1 will be described in more detail. While the configuration and functions of the control unit 26 are arbitrary, in this embodiment, First embodiment: The ultraviolet irradiation source 12 is fixed, and the cumulative irradiation level is determined to control the ultraviolet irradiation period. Second embodiment: The ultraviolet irradiation source 12 is fixed, and the ultraviolet irradiation period is controlled by determining the target irradiation period. Third embodiment: The ultraviolet irradiation source 12 is configured for variable irradiation, and the ultraviolet irradiation level is controlled by determining the target irradiation level. It will be one of the following.

[0121] (e1. First embodiment of the control unit) Figure 6 shows a first embodiment of the control unit 26 installed in the facility management device 24, together with the observation unit 25, ultraviolet irradiation source 12, illuminance sensor 20, and relay device 22.

[0122] The control unit 26 of this embodiment maintains a constant irradiation level of the ultraviolet irradiation source 12, and when predetermined irradiation start conditions are met in the room that constitutes the target area, it starts irradiating with ultraviolet light from the ultraviolet irradiation source 12. The control unit controls the cumulative irradiation level σp, which is obtained by accumulating the irradiation level p observed by the observation unit over time, so that it reaches a predetermined target level Pt that kills pathogens to a predetermined inactivation target, for example, 99.9%. Its functions and configuration are arbitrary, but as an example, as shown in Figure 6, it consists of an irradiation start condition determination unit 100, a target level setting unit 104, an irradiation level accumulation unit 105, and a comparison unit 108.

[0123] The irradiation start condition determination unit 100 determines whether predetermined irradiation start conditions are met. While the irradiation start conditions are arbitrary, one example is that, based on the usage status of the room in the target area, for example, information indicating the presence or absence of people, the unit determines that the irradiation start conditions are met when a person enters the room and / or leaves the room, as these are likely times when pathogens are brought into the room and when pathogens remain in the room. In each case, the unit determines that the irradiation start conditions are met and outputs an irradiation start signal E1 to the ultraviolet irradiation source 12. The drive circuit unit 46 shown in Figure 2 turns on the excimer lamp 60 of the lamp unit 48, and the irradiation of ultraviolet light begins. In addition to this, the unit appropriately determines whether the irradiation start conditions are met according to various usage statuses related to pathogen infection in the target area.

[0124] In addition to ultraviolet irradiation based on the fulfillment of irradiation start conditions determined by the irradiation start condition determination unit 100, ultraviolet irradiation may also be performed based on the setting of a timetable. The function and configuration of the timetable are arbitrary, but for example, irradiation start and end times can be set on a daily basis, divided into weekdays, holidays, special days, etc., and the period from the irradiation start time to the irradiation end time is judged to have been fulfilled, and ultraviolet irradiation is performed at predetermined cycles, for example, every hour.

[0125] The target level setting unit 104 pre-sets a target level Pt that inactivates a predetermined pathogen to a predetermined inactivation target, for example, a target level Pt that kills 99.9% of the pathogen. The target level is a predetermined value that corresponds to the pathogen, such as a virus or bacteria, that is to be inactivated. Since the value differs depending on the type of pathogen, if there is only one pathogen to be irradiated, the target level corresponding to that pathogen is set, and if there are multiple types of pathogens to be irradiated, the target level with the highest value among them is set.

[0126] Furthermore, the target level is based on the target level that kills 99.9% of the target pathogen, and does not preclude setting a target level that is a predetermined percentage higher or lower for inactivation. For example, if the emphasis is on pathogen inactivation, a predetermined target level greater than one times the target level for 99.9% elimination may be set. On the other hand, if the emphasis is on safety for the human body or if the amount of pathogen contamination is expected to be small, a predetermined target level less than one times the target level for 99.9% elimination may be set.

[0127] The irradiation level integration unit 105 integrates the irradiation level p output from the observation unit 25 over time during ultraviolet irradiation and outputs the integrated irradiation level σp to the comparison unit 108.

[0128] In this setup, multiple illuminance sensors 20 are placed within the target room, and the observation unit 25 obtains the irradiation levels of multiple observation points as observation results via the relay device 22. The observation unit 25 is equipped with an irradiation level processing unit 98, which calculates the average or minimum value of the irradiation levels of the multiple observation points obtained as observation results, and outputs this as the detected irradiation level p to the irradiation level integration unit 105.

[0129] When using the average value of the irradiation levels from multiple observation points, the averaging of the irradiation levels at each observation point reduces the variation (error) in irradiation levels at each point. Furthermore, when using the minimum irradiation level from multiple observation points, the cumulative irradiation level at observation points other than the minimum will exceed the target level, enabling more reliable inactivation of pathogens overall. Note that if only one illuminance sensor 20 is used, the irradiation level detected by that sensor 20 is used directly for integration.

[0130] The comparison unit 108 is the irradiation level integration unit 10 5 The cumulative irradiation level σp output by the system is compared with the target level Pt output from the target level setting unit 104. When the cumulative irradiation level σp matches the target level Pt, it is determined that the irradiation stop timing has arrived, and an irradiation stop signal E2 is output to the ultraviolet irradiation source 12 to stop the ultraviolet irradiation. As a result, the target object receives ultraviolet irradiation at the target level.

[0131] (e2. Second embodiment of the control unit) Figure 7 shows a second embodiment of the control unit 26, in which the irradiation level from the ultraviolet irradiation source 12 is kept constant, and when a predetermined irradiation start condition is met in the room that is the target area, ultraviolet irradiation is started from the ultraviolet irradiation source 12, and when the target irradiation period Tt, which is set based on the irradiated level p observed immediately after the start of irradiation and the target level Pt, has elapsed, the irradiation is stopped, and it is determined that the irradiation stop timing has arrived, and the control is performed so that the cumulative irradiated level received by the irradiated object reaches the predetermined target level Pt. Its functions and configuration are arbitrary, but as an example, as shown in Figure 7, it consists of an irradiation start condition determination unit 100, a timer 102, a target level setting unit 104, a target irradiation period calculation unit 106, and a comparison unit 108.

[0132] The irradiation start condition determination unit 100 is the same as in Figure 6, and when a predetermined irradiation start condition is met, it outputs an irradiation start signal E1 to the ultraviolet irradiation source 12, and the drive circuit unit 46 shown in Figure 2 turns on the excimer lamp 60 of the lamp unit 48 and starts ultraviolet irradiation.

[0133] The timer 102 counts the ultraviolet irradiation period T, for example, in seconds. It starts when the irradiation start condition determination unit 100 determines that the irradiation start condition has been met and outputs the irradiation start signal E1, and outputs the counted irradiation period T to the comparison unit 108. The target level setting unit 104 is the same as in Figure 6 and sets the target level Pt to inactivate a predetermined pathogen to a predetermined inactivation target.

[0134] The target irradiation period calculation unit 106 calculates the target irradiation period Tt by dividing the target level Pt set by the target level setting unit 104 by the irradiation level p received by the irradiation target observed by the observation unit 25, when the irradiation start condition determination unit 100 determines that the irradiation start condition has been met and the irradiation start signal E1 is output, and outputs this to the comparison unit 108. This is because the target level Pt is (Target level Pt) = (Irradiation level p) × (Target irradiation period Tt) This is based on the fact that they are in a relationship.

[0135] Here, the observation unit 25 is equipped with an irradiation level processing unit 98. Similar to the embodiment in Figure 6, it calculates the average or minimum value of the irradiation levels at multiple observation points obtained as observation results from multiple illuminance sensors 20, outputs this as the detected irradiation level p to the target irradiation period calculation unit 106, and calculates the target irradiation period Tt.

[0136] The comparison unit 108 calculates the target irradiation output by the target irradiation period calculation unit 106. period Tt and the time elapsed since the start of irradiation, as output from Timer 102. period irradiation period Compare with T and irradiation period T targets period When it matches Tt, the system determines that the irradiation stop timing has arrived, outputs an irradiation stop signal E2 to the ultraviolet irradiation source 12, and stops the ultraviolet irradiation, resulting in ultraviolet irradiation reaching the target level.

[0137] (e3. Third embodiment of the control unit) Figure 8 shows a third embodiment of the control unit 26 provided in the facility management device 24. The control unit 26 in this embodiment varies the irradiation level PS of ultraviolet light irradiated from the ultraviolet light irradiation source 12, and a predetermined fixed Irradiation period T f Based on the target level Pt, the target irradiation level po that the irradiated object will receive is determined in advance, and when the predetermined irradiation start conditions are met, the ultraviolet irradiation source 12 starts irradiating with ultraviolet light, and the irradiation level PS of the ultraviolet irradiation source 12 is controlled so that the irradiation level p observed by the observation unit 25 during ultraviolet irradiation becomes the target irradiation level po. fixed Irradiation period T f When the irradiation stop timing based on the above criteria arrives, the system determines that the irradiation stop timing has arrived and controls the irradiation of ultraviolet light to stop. Its functions and configuration are arbitrary, but as an example, as shown in Figure 8, it consists of an irradiation start condition determination unit 100, an irradiation period setting unit 112, a target level setting unit 104, a target irradiation level setting unit 114, a deviation calculation unit 116, and an output unit 118.

[0138] The irradiation start condition determination unit 100 is the same as in the embodiment shown in Figure 6, and determines whether a predetermined irradiation start condition has been met. For example, it determines that the irradiation start condition has been met when a person enters the room and / or when a person leaves the room, and outputs an irradiation start signal E1 to the ultraviolet irradiation source 12. The drive circuit unit 46 shown in Figure 2 turns on the excimer lamp 60 of the lamp unit 48 and starts ultraviolet irradiation.

[0139] The irradiation period setting unit 112 sets a predetermined fixed irradiation period Tf for irradiating with ultraviolet light for a certain period of time. The fixed irradiation period Tf to be set is arbitrary, but for example, the fixed irradiation period Tf is set to a period corresponding to the target irradiation period Tt calculated in the embodiment of Figure 7.

[0140] Here, the irradiation start condition determination unit 100 has a predetermined fixed irradiation period Tf set by the irradiation period setting unit 112, and when the irradiation start condition is met and ultraviolet irradiation starts, the timer is activated and the elapsed period T is counted, and period When T matches a predetermined fixed irradiation period Tf, it is determined that the irradiation stop timing has arrived, and an irradiation stop signal E2 is output to the ultraviolet irradiation source 12 to stop the irradiation of ultraviolet light.

[0141] The target level setting unit 104 is the same as in the embodiment shown in Figure 6, and sets a target level Pt to inactivate a predetermined pathogen to a predetermined inactivation target, for example, a target level Pt to kill 99.9% of the pathogen.

[0142] The target irradiation level setting unit 114 calculates the target irradiation level po by dividing the target level Pt set by the target level setting unit 104 by the fixed irradiation period Tf set by the irradiation period setting unit 112 when the irradiation start condition determination unit 100 determines that the irradiation start condition has been met and the irradiation start signal E1 is output, and outputs this to the deviation calculation unit 116. This is because the target level Pt is (Target level Pt) = (Target irradiation level po) × (Fixed irradiation period Tf) This is based on the fact that they are in a relationship.

[0143] The deviation calculation unit 116 takes the target irradiation level po output from the target irradiation level setting unit 114 and the observation unit 2 5 The deviation Δp from the output radiation level p is Δp = po - p The deviation Δp is calculated and output to the output unit 118. The deviation Δp can be positive or negative.

[0144] Here, the observation unit 25 is equipped with an irradiation level processing unit 98. Similar to the embodiment in Figure 6, it calculates the average or minimum value of the irradiation levels at multiple observation points obtained as observation results from multiple illuminance sensors 20, outputs this as the detected irradiation level p to the deviation calculation unit 116, and calculates the deviation Δp from the target irradiation level po.

[0145] The output unit 118 outputs an irradiation level reduction signal E3 to the ultraviolet irradiation source 12 to lower the irradiation level PS if the deviation Δp from the deviation calculation unit 116 is positive, and outputs an irradiation level increase signal E4 to the ultraviolet irradiation source 12 to increase the irradiation level PS if the deviation Δp is negative. In this way, the irradiation level PS of the ultraviolet irradiation source 12 is feedback controlled so that the irradiation level p observed by the observation unit 25 becomes the target irradiation level po, and the cumulative irradiation level received by the irradiated object during the fixed irradiation period Tf becomes the target level Pt, making it possible to reliably inactivate pathogens.

[0146] [f. Specific examples of UV irradiation control] Next, we will explain in more detail specific examples of UV irradiation control that correspond to the intended use of the room in question and the risk of infection by pathogens.

[0147] Figure 9 is an explanatory diagram showing an example of the ultraviolet irradiation map screen displayed on the facility management device in Figure 1. The ultraviolet irradiation map screen 120 in Figure 9 displays a floor plan of a floor in the office building that is the target area, and consists of, for example, an entrance area 122, a first office area 124, a second office area 126, a reception area 128, and a conference area 130. The first office area 124 and the second office area 126 are the same room, but are divided into two smaller areas (sub-regions) according to their purpose of use.

[0148] Figure 10 is an explanatory diagram showing the arrangement of ultraviolet irradiation sources and illuminance sensors in the target area corresponding to Figure 9. One ultraviolet irradiation source 12 is installed in each of the entrance area 122, the first office area 124, the second office area 126, the reception area 128, and the conference area 130, and multiple illuminance sensors 20 are installed.

[0149] Figure 11(A) is an explanatory diagram of the control table 132 in which the infection risk level of the pathogen and the target level Pt corresponding to the target area shown in Figures 9 and 10 are set. It also shows, as an example, the storage location of the irradiation level p and target irradiation period Tt that the irradiated target receives, which are used as control parameters in the second embodiment of the control unit 26 shown in Figure 7. Figure 11(B) shows a specific numerical example.

[0150] The infection risk level for each area is determined according to its intended use. For example, the entrance / exit area is rated "High," followed by the first office area with many desks (people) at "Medium-High," the second office area with fewer desks (people) at "Medium," the meeting area at "Medium-Low" due to its frequency of use, and the reception area at "Low" due to its low frequency of use. Setting the infection risk level for each area is arbitrary and does not prevent dividing areas into any desired levels.

[0151] The target level Pt is set as follows: for example, in the second office area where the infection risk is "medium," the target level Pt3 is set to a predetermined inactivation target, for example, a target level Pt3 = 10,000 [μW·s / cm2] that kills 99.9% of a certain pathogen. Based on this, the exit area is set to 1.5 times that, Pt1 = 15,000 [μW·s / cm2], the first office area to 1.25 times that, Pt2 = 12,500 [μW·s / cm2], the meeting area to 0.75 times that, Pt4 = 7,500 [μW·s / cm2], and the reception area to 0.5 times that, Pt5 = 5,000 [μW·s / cm2]. The target level is shown as an example, and is not limited to this value, as the value required to kill 99.9% of most currently known viruses, bacteria, and other pathogens does not exceed 10,000 [μW·s / cm2].

[0152] Furthermore, if we assume that the observed irradiation level p when the irradiation start conditions are met in the target area and ultraviolet irradiation begins is p1=100 [μW / cm2] for the entrance / exit area, p2=75 [μW / cm2] for the first office area, p3=125 [μW / cm2] for the second office area, p4=100 [μW / cm2] for the reception area, and p5=50 [μW / cm2] for the conference area, then the target irradiation period Tt, calculated by dividing the target level for each area by the irradiated level, would be Tt1=150 [sec] for the entrance / exit area, Tt2=167 [sec] for the first office area, Tt3=80 [sec] for the second office area, Tt4=50 [sec] for the reception area, and Tt5=150 [sec] for the conference area, and so on, each target irradiation period The system controls the irradiation of ultraviolet light over a certain period. Note that the target level value is just an example and is determined arbitrarily depending on the illuminance [w / cm2] at the surface of the excimer lamp used and the distance to the illuminance sensor.

[0153] Alternatively, instead of setting the infection risk level in control table 132, the congestion level of the target area may be set. Since congestion level and infection risk level are correlated, and the higher the congestion level, the higher the infection risk, the target level should be set to increase in accordance with the increase in congestion level. Also, since congestion level changes depending on usage, the target level may be changed in accordance with the change in congestion level.

[0154] Figure 12 is a time chart showing the control timing of ultraviolet irradiation based on the fulfillment of irradiation start conditions corresponding to the entry and exit of people in the target area, divided into modes. Figure 12(A) shows the entry and exit of people, with a person entering at time t1 and a person leaving at time t2. In the first mode shown in Figure 12(B), the ultraviolet irradiation source 12 is turned on when a person enters at time t1, and the target irradiation is determined, for example, by the control table 132 shown in Figure 11. period Ultraviolet light is irradiated during this time. In the second mode shown in Figure 12(C), ultraviolet light is not irradiated when a person enters at time t1, but when a person leaves at time t2. In the third mode shown in Figure 12(D), ultraviolet light is irradiated both when a person enters at time t1 and when a person leaves at time t2. In the control using the control table 132 in Figure 10, one of the first to third modes shall be set in advance according to the purpose of use and usage conditions of the target area, and the mode shall be changed as necessary.

[0155] [g. UV irradiation control operation] (g1. Overview of control operation) Next, referring to the flowchart in Figure 13, we will explain the general operation of the control unit 26 installed in the facility management device 24 for controlling ultraviolet irradiation.

[0156] In Figure 13, the control unit 26 reads the control table 132 of the target area shown in Figure 11 in step S1, and then in step S2 reads the usage status of the target area, for example, when people enter or leave the target area. Subsequently, in step S3, it determines that the irradiation start condition has been met, for example, when a person enters the target area shown in Figure 10 and / or when a person leaves the target area, and in step S4, it performs ultraviolet irradiation control based on any of the first to third embodiments in Figures 6 to 8, and when the ultraviolet irradiation is finished, it returns to step S2 and prepares for the next irradiation start condition to be met.

[0157] (g2. Control operation of ultraviolet irradiation according to the first embodiment) Figure 14 is a flowchart showing the details of the ultraviolet irradiation control in step S4 of Figure 13, and represents the control according to the first embodiment of the control unit 26 shown in Figure 6. In Figure 14, the control unit 26 sets the target level Pt of the target area by referring to the control table 132 that was read in advance in step S11, and then proceeds to step S12, where it outputs an irradiation start signal to the ultraviolet irradiation source 12 to start ultraviolet irradiation.

[0158] Next, the irradiation level p obtained as an observation result in step S13 is read and integrated to calculate the integrated irradiation level σp, and in step S14 it is determined whether or not it has reached the target level Pt. If it is determined in step S14 that the integrated irradiation level σp has reached the target level Pt, the process proceeds to step S15, where an irradiation stop signal is output to the ultraviolet irradiation source 12 to stop ultraviolet irradiation, and the process returns to step S2 in Figure 13 to prepare for the fulfillment of the next irradiation start condition.

[0159] (g3. Control operation of ultraviolet irradiation according to the second embodiment) Figure 15 is a flowchart showing the details of the ultraviolet irradiation control in step S4 of Figure 12, and represents the control according to the second embodiment of the control unit 26 shown in Figure 7. In Figure 15, the control unit 26 sets the target level Pt of the target area by referring to the control table 132 that was read in advance in step S21, and then proceeds to step S22, where it outputs an irradiation start signal to the ultraviolet irradiation source 12 to start ultraviolet irradiation, and also starts the timer to start counting the irradiation period T.

[0160] Next, in step S23, the irradiation level p obtained as an observation result is read, and in step S24, the target irradiation period Tt is calculated by dividing the target level Pt by the irradiation level p. In step S25, it is determined whether the irradiation period T, determined by the timer, has reached the target irradiation period Tt. If it is determined in step S25 that the irradiation period T has reached the target irradiation period Tt, the process proceeds to step S26, where an irradiation stop signal is output to the ultraviolet irradiation source 12 to stop ultraviolet irradiation, and the process returns to step S2 in Figure 13 to prepare for the fulfillment of the next irradiation start condition.

[0161] (g4. Control operation of ultraviolet irradiation according to the third embodiment) Figure 16 is a flowchart showing the details of the ultraviolet irradiation control in step S4 of Figure 12, and represents the control according to the third embodiment of the control unit 26 shown in Figure 8. In Figure 16, the control unit 26 sets the target irradiation level po in step S31 based on the fixed irradiation period Tf and the target level Pt of the target area, then proceeds to step S32, where it outputs an irradiation start signal to the ultraviolet irradiation source 12 to start ultraviolet irradiation, and also starts the timer to start counting the irradiation period T. Subsequently, in step S33, it reads the irradiation level p obtained as an observation result, and in step S34, it calculates the deviation Δp from the target irradiation level pt. Next, if it is determined in step S35 that the deviation Δp is a positive value, the process proceeds to step S36, and the irradiation level PS of the ultraviolet irradiation source 12 is increased. On the other hand, if it is determined in step S37 that the deviation Δp is a negative value, the process proceeds to step S38, and the irradiation level PS of the ultraviolet irradiation source 12 is decreased. If the deviation Δp is neither positive nor negative, but zero, the process proceeds to step S39, and the irradiation level PS of the ultraviolet irradiation source 12 is maintained.

[0162] Next, the process proceeds to step S40, where it is determined whether the irradiation period T, controlled by the timer, has reached the fixed irradiation period Tf. If it has not reached the fixed period, the process from step S33 is repeated, and the irradiation level PS of the ultraviolet irradiation source 12 is feedback-controlled so that the irradiation level p received by the irradiated object becomes the target irradiation level po. If it is determined in step S40 that the irradiation period T has reached the fixed irradiation period Tf, the process proceeds to step S41, where an irradiation stop signal is output to the ultraviolet irradiation source 12 to stop the irradiation of ultraviolet light, and the process returns to step S2 in Figure 13 to prepare for the fulfillment of the next irradiation start condition.

[0163] Alternatively, instead of determining whether the deviation Δp is positive or negative, the irradiation level PS may be reduced when the deviation is greater than or equal to a predetermined deviation threshold +Δpth, increased when it is less than or equal to a predetermined deviation threshold -Δpth, and maintained when the deviation is between +Δpth and -Δpth.

[0164] [h. Monitoring Department] Next, an embodiment of the monitor unit 28 installed in the facility management device 24 shown in Figure 1 will be described in more detail. The monitor unit 28 is used to inform the user of the ultraviolet radiation status within the target area observed by the observation unit 25. Its functions and configuration are arbitrary, but as an example, it uses the ultraviolet radiation map screen 120 shown in Figure 9 to inform the user of the ultraviolet radiation status observed within the target area.

[0165] The ultraviolet irradiation map screen 120 in Figure 9 displays the target area as described above, divided into entrance / exit area 122, first office area 124, second office area 126, reception area 128, and conference area 130. Of these, the first office area 124 and the second office area 126 are the same room divided into two smaller areas (sub-regions). Here, the first office area 124, the second office area 126, and the reception area 128 are currently being irradiated with ultraviolet light, and are identified by a predetermined color that becomes darker in proportion to the magnitude of the target level Pt1 to Pt4 values ​​shown in Figure 12, or by a different color. For example, it can be easily seen that the level of ultraviolet irradiation is high in the entrance / exit area 122, which has the darkest displayed color. The conference area 130 is not currently being irradiated with ultraviolet light and is waiting for the irradiation conditions to be met, so no color indicating ultraviolet irradiation is shown, and it is displayed on a white background.

[0166] Furthermore, since the monitoring unit 28 obtains the irradiation level detected by the illuminance sensor 20 placed in the target area by the observation unit 25 as the observation result, it may display a sensor mark indicating the illuminance sensor 20 shown in Figure 10 on the ultraviolet irradiation map screen 120 in Figure 9, and numerically display the detected irradiation level (illuminance) value near the sensor mark. This makes it easy to check what level of ultraviolet irradiation is actually being obtained.

[0167] Furthermore, the monitor unit 28 displays and / or sounds information indicating the safety of the target area, the amount of light irradiation in the target area, the prohibition of use of the target area, or restrictions on use of the target area, based on the ultraviolet irradiation status observed within the target area.

[0168] Figure 17 is a flowchart showing the monitor control process by the monitor unit. In Figure 17, the monitor unit 28 determines the state change, such as the start or end of ultraviolet irradiation, to the irradiated object in the target area in step S51. Once the state change is determined from the observation result of the irradiation level by the observation unit 25, the process proceeds to step S52, where the area where the state change occurred is identified. In step S53, as shown in Figure 9, the change in irradiation state is displayed on the ultraviolet irradiation map screen 120. Subsequently, the process proceeds to step S54, where the presence of guidance information is determined, and then to step S55, where the guidance information is displayed and / or output by sound. The process returns to step S51 and waits for the next state change.

[0169] [i. Facility management system that monitors usage status using motion sensors] Next, referring to Figure 18, we will describe in detail a facility management system that monitors the usage status within a target area based on observations from motion sensors installed within that area.

[0170] As shown in Figure 18, the office building that is the target facility is equipped with a facility management device 24, and rooms A1 and A2, which are the monitoring areas, are equipped with an ultraviolet irradiation source 12 and an illuminance sensor 20. The facility management device 24 is equipped with observation unit 25, control unit 26 and monitoring unit 28 functions, similar to the embodiment in Figure 1, and each performs the same functions as described above. The number of rooms is arbitrary, and only a portion of room A2 is shown, with subsequent rooms omitted from the illustration. In the following explanation, "rooms A1, A2..." will be referred to as "room Ai". Here, i is an integer from 1, 2...n, indicating that they are different rooms.

[0171] In addition, the observation unit 25 of the facility management device 24 observes the usage status within the target area based on detection information from the human presence sensor 140 installed in the room Ai, which is the target area.

[0172] The motion sensor 140 detects a person entering room Ai and outputs an observed value. Its function, configuration, and type are arbitrary, but for example, it can detect infrared radiation emitted from the human body using a pyroelectric element and output a human body detection signal as an observed value of a person. Multiple detection areas are formed radially by a lens structure formed in the sensor cover housing the pyroelectric element, and a human body detection signal is output from the change in infrared radiation (differential characteristics) detected when a person passes through the detection area.

[0173] In this embodiment, the entire room is covered as a detection area by installing the motion sensors 140 in two separate locations within room Ai. The number of motion sensors 140 installed in room Ai is arbitrary; for example, room Ai may be divided into multiple detection areas, and the motion sensors 140 may be arranged to cover each detection area, or they may be arranged to detect specific targets within room Ai, such as desks, floor mats at entrances, or other places where pathogens are likely to be present. Furthermore, some facilities may have security sensors installed to monitor the intrusion of suspicious individuals, and since some security sensors detect infrared radiation emitted from the human body, just like the motion sensors 140, the security sensors in the facility's security system may be used as motion sensors 140.

[0174] The motion sensor 140 installed in room Ai is connected to the facility management device 24 via a transmission line 37. The observation unit 25 of the facility management device 24 receives a human body detection signal as an observation value from the motion sensor 140 installed in room Ai, and generates and stores observation results (detection information) for each room Ai indicating the presence or absence of a person, which represents the occupancy status of the room. In other words, the observation unit 25 registers the presence of a person when it receives a human body detection signal from the motion sensor 140, and deletes the registration of the person's presence, indicating that the room is unoccupied, when it stops receiving human body detection signals. Furthermore, if room Ai is divided into multiple sub-areas and motion sensors 140 are placed in each sub-area, the observation unit 25 generates and stores observation results indicating the presence or absence of a person for each sub-area of ​​room Ai.

[0175] When the control unit 26 of the facility management device 24 determines that the condition for initiating irradiation has been met based on the observation results indicating the presence or absence of a person based on the human presence sensor 140, it controls the irradiation of the target to inactivate pathogens by irradiating them with ultraviolet light from the ultraviolet irradiation source 12 so that the cumulative irradiation level received by the target reaches a predetermined target level.

[0176] Furthermore, since the motion sensor 140 will not be able to obtain a human body detection signal if there is no detectable movement from a person in the room, the observation unit 25 will delete the registration of a person's presence in the room and mark it as absent if the state of no human body detection signal being received continues for a predetermined period of time.

[0177] [j. Facility management system that monitors usage status using location information from mobile devices] Next, we will describe in detail a facility management system that monitors usage within a target area based on location information from mobile devices.

[0178] As shown in Figure 19, the office building that is the target facility is equipped with a facility management device 24, and the room Ai, which is the monitoring area, is equipped with an ultraviolet irradiation source 12 and an illuminance sensor 20. The facility management device 24 is equipped with observation unit 25, control unit 26 and monitoring unit 28 functions, similar to the embodiment in Figure 1, and each performs the same functions as described above.

[0179] In addition, the observation unit 25 of the facility management device 24 observes the usage status of Room Ai based on the location information of the mobile terminal 142 held by the person in Room Ai, and generates observation results indicating, for example, whether or not a person is present.

[0180] (j1. Generation of observation results based on GPS location information) Here, the method for detecting the location of the mobile terminal 142 is arbitrary, but for example, the mobile terminal 142 uses a function to detect its own GPS location information (latitude, longitude, and altitude in Earth coordinates) based on GPS (Global Positioning System), and transmits the GPS location information detected by the mobile terminal 142 to the mobile terminal management server 148 owned by the telecommunications company that provides the communication service for the mobile terminal 142, via the base station 144 and network 146. The mobile terminal management server 148 identifies the mobile terminal 142 present in room Ai based on the GPS location information of the mobile terminal 142 and map information indicating room Ai of the building, and transmits the identification result to the facility management device 24, and the observation unit 25 generates observation results indicating the usage status for each room Ai, for example, whether or not there are people present.

[0181] To explain the generation of observation results in more detail, when the observation unit 25 receives terminal identification information of mobile terminal 142 from the mobile terminal management server 148, it generates target person information indicating the person in each room Ai by registering it in the target person management table in memory, separated by room Ai. If it is already registered, it updates the registration by overwriting. Furthermore, if the terminal identification information of mobile terminal 142 registered in the target person management table is not updated within a predetermined time, the observation unit 25 determines that mobile terminal 142 does not exist in room Ai and deletes the registration. As a result, the observation unit 25 determines the number of people in each room Ai from the number of terminal identification information of mobile terminal 142 registered for each room Ai in the target person management table, and generates observation results indicating the room usage status, for example, whether or not there are people.

[0182] (j2. Generation of observation results using other position detection methods) Furthermore, other known location detection methods for the mobile terminal 142 include the Time Difference of Arrival (TDOA) method and the Received Signal Strength Indicator (RSSI) method. The mobile terminal management server 148 may use these location detection methods to detect the mobile terminal 142 present in the target area, Room Ai, transmit its terminal identification information to the facility management device 24, and the observation unit 25 may generate observation results indicating the usage status of Room Ai, such as whether or not people are present.

[0183] Here, the Time Difference Arrival Method (TDOA) is a method that detects the position of the mobile terminal 142 by measuring the arrival time of radio waves at multiple base stations and performing trilateration. The Reception Strength Indicator (RSSI) is a method that detects the position of the mobile terminal 142 by measuring the signal strength at multiple base stations and performing trilateration. Trilateration is a method that uses two base stations whose coordinates are already determined, and measures the distance between the mobile terminal 142 and the two base stations, which is determined by the difference in radio wave arrival time or the signal strength. The intersection point of the circle with this distance as the radius is determined as the coordinate position of the mobile terminal 142.

[0184] The control unit 26 of the facility management device 24 determines that the conditions for starting irradiation have been met based on the observation results indicating the room Ai usage status, for example, whether or not there are people present, generated by the observation unit 25 from the location information of the mobile terminal 142. The control unit then performs control to irradiate the target with ultraviolet light from the ultraviolet irradiation source 12 to inactivate pathogens, so that the cumulative irradiation level received by the target reaches a predetermined target level.

[0185] In this embodiment, the detection of the mobile terminal 142 present in room Ai may be based on both the GPS location information of the mobile terminal 142 and location information obtained using the radio wave arrival time difference method or the radio wave reception strength method. For example, depending on the location of the building, the mobile terminal 142 may not be able to receive radio waves from GPS satellites, and therefore GPS location information may not be detected. In this case, location information obtained using the radio wave arrival time difference method or the radio wave reception strength method may be used.

[0186] Furthermore, the observation unit 25 can determine the number of people in each room Ai from the number of terminal identification information entries for the mobile terminals 142 registered in the target person management table, and can calculate the degree of congestion (overdensity) by dividing the number of people in each room Ai by the capacity (maximum number of people in the room). For this reason, the control unit 26 sets a target level according to the degree of congestion of the room Ai obtained as an observation result by the observation unit 25 and controls the irradiation of ultraviolet light. For example, the target level at a congestion level of 100%, where the number of people in the room matches the capacity, is set as the reference value. If the congestion level exceeds 100%, the target level is set higher than the reference value, and if the congestion level falls below 100%, the target level is set lower than the reference value, enabling appropriate irradiation of ultraviolet light corresponding to the degree of congestion.

[0187] [k. A facility management system that monitors usage status using short-range wireless communication on mobile devices] Next, we will describe in detail a facility management system that monitors usage within a target area based on short-range wireless communication of mobile devices.

[0188] As shown in Figure 20, the office building that is the target facility is equipped with a facility management device 24, and the room Ai, which is the monitoring area, is equipped with an ultraviolet irradiation source 12 and an illuminance sensor 20. The facility management device 24 is equipped with observation unit 25, control unit 26 and monitoring unit 28 functions, similar to the embodiment in Figure 1, and each of them realizes the functions described above.

[0189] In addition, the observation unit 25 of the facility management device 24 observes the usage status within the target area based on short-range wireless communication of the mobile terminal 142. The mobile terminal 142 is equipped with short-range wireless communication functionality, such as Bluetooth®. A short-range wireless adapter 150 is also installed in room Ai, enabling short-range wireless communication with the mobile terminal 142. The short-range wireless adapter 150 periodically transmits a predetermined beacon signal using radio waves of sufficient strength to enable communication within room Ai.

[0190] When the mobile terminal 142 receives a beacon signal from the short-range wireless adapter 150, it transmits a beacon response signal containing its own terminal identification information. When the short-range wireless adapter 150 receives the beacon response signal from the mobile terminal 142, it transmits the terminal identification information of the mobile terminal 142 to the facility management device 24 connected via the transmission path 39. Based on the terminal identification information received from the short-range wireless adapter 150, the observation unit 25 of the facility management device 24 generates observation results indicating the usage status, for example, whether or not people are present, for each room Ai that constitutes the target area.

[0191] To explain the generation of target information in more detail, when the observation unit 25 receives terminal identification information of the mobile terminal 142 from the short-range wireless adapter 150, it generates target information indicating the person in each room Ai by registering it in the target management table in memory, separated by room Ai. If it is already registered, it is updated by overwriting. Furthermore, if the terminal identification information of the registered mobile terminal 142 is not updated within a predetermined time, the observation unit 25 determines that it does not exist in the room Ai and deletes the registration. As a result, the observation unit 25 calculates the number of people present in the room Ai, for example, from the number of terminal identification information of the mobile terminal 142 registered in the target management table for each room Ai, and generates an observation result indicating the presence or absence of people.

[0192] The control unit 26 of the facility management device 24 determines that the conditions for starting irradiation have been met based on the observation results indicating the room Ai usage status, for example, whether or not there are people present, generated by the observation unit 25 from the short-range wireless communication information of the mobile terminal 142. When this determination is made, the control unit 26 controls the irradiation of the target to inactivate pathogens by irradiating them with ultraviolet light from the ultraviolet irradiation source 12 so that the cumulative irradiation level received by the target reaches a predetermined target level.

[0193] Furthermore, the observation unit 25 can determine the number of people in each room Ai from the number of terminal identification information entries for the mobile terminals 142 registered in the subject management table. It can then calculate the degree of congestion by dividing the number of people in each room Ai by the capacity of each room Ai (maximum number of people in the room), and, as described above, control the irradiation of ultraviolet light according to the degree of congestion.

[0194] [l. Facility management system that monitors usage status based on operational information of office automation equipment] Next, we will describe in detail a facility management system that monitors usage within a target area based on operational information of office automation equipment.

[0195] As shown in Figure 21, the office building that is the target facility is equipped with a facility management device 24, and the room Ai, which is the monitoring area, is equipped with an ultraviolet irradiation source 12 and an illuminance sensor 20. The facility management device 24 is equipped with observation unit 25, control unit 26 and monitoring unit 28 functions, similar to the embodiment in Figure 1, and each of them realizes the functions described above.

[0196] In addition, the observation unit 25 of the facility management device 24 observes the usage status within the target area based on the operating information of the office automation equipment 152. The room Ai, which is the target area, is equipped with office automation equipment 152 such as a personal computer, printer, copier, and facsimile machine, and the office automation equipment 152 is connected to the server 154 via a LAN line 35.

[0197] Server 154, once powered on, operates continuously for 24 hours a day. In contrast, OA equipment such as personal computers, printers, copiers, and fax machines 1 5 In scenario 2, the system becomes operational when a person enters Room Ai and turns on the power. When the workday ends, the power is shut down before the person leaves the room, ending its operation.

[0198] When the OA device 152 is powered on and started up, the powered-on OA device 152 is registered in the network-connected devices managed by the server 154 via the LAN line 35, and can be seen on the screen as a network-connected device icon. When the power to the OA device 152 is shut down and operation ends, the registration of the shut-down OA device 152 is deleted from the network connection information managed by the server 154.

[0199] The facility management device 24 is also connected to the LAN line 35, and the observation unit 25 of the facility management device 24 obtains operational terminal identification information based on the network connection of the OA equipment 152 from the server 154 and generates observation results indicating the usage status of the room AI, for example, whether or not there are people present.

[0200] To explain in more detail, when the server 154 detects that the OA equipment 152 is powered on and a network connection is established, it transmits operational terminal identification information indicating the operation of the network-connected OA equipment 152 to the facility management device 24. When the observation unit 25 of the facility management device 24 receives the operational terminal identification information of the OA equipment 152 from the server 154, it registers it in the target user management table in memory, separated by room Ai. If it is already registered, it updates the registration by overwriting.

[0201] Furthermore, when the server 154 detects that the network connection has been disconnected due to the power shutdown of the office automation equipment 152, it transmits operational shutdown terminal identification information indicating that the network-connected office automation equipment 152 has stopped operating to the facility management device 24. When the observation unit 25 of the facility management device 24 receives the operational shutdown terminal identification information for the office automation equipment 142 from the server 154, it deletes the corresponding operational terminal identification information registered in the target user management table in memory.

[0202] As a result, the observation unit 25 generates an observation result indicating the occupancy status of a room Ai, for example, whether or not there are people present, based on the number of operational terminal identification information registered separately for each room Ai in the target person management table.

[0203] The control unit 26 of the facility management device 24 determines that the conditions for starting irradiation have been met based on the observation results indicating the room Ai usage status, for example, whether or not there are people present, generated by the observation unit 25 from the operating information of the OA equipment 152. The control unit then performs control to irradiate the target with ultraviolet light from the ultraviolet irradiation source 12 to inactivate pathogens, so that the cumulative irradiation level received by the target reaches a predetermined target level.

[0204] Furthermore, the observation unit 25 can determine the number of people in each room Ai from the number of operating information entries for the OA equipment 152 registered in the target person management table. It can then calculate the degree of congestion by dividing the number of people in each room Ai by the room Ai's capacity (maximum number of people in the room), and, as described above, control the irradiation of ultraviolet light according to the degree of congestion. In addition, operating information of equipment other than OA equipment, such as lighting equipment, can be applied in the same manner.

[0205] [m. Modifications of the present invention] (Observation Department) The facility management system of the above embodiment generates observation results indicating the presence or absence of people and the degree of congestion in rooms, etc., of a facility based on motion sensors, location information and communication signals of mobile devices, and operating information of office automation equipment. However, it is not limited to this and is arbitrary, and may include appropriate means that enable observation of the usage status of a target area, such as detecting the opening and closing of entrance doors to rooms, turning room lighting switches on and off, and using mat sensors (pressure sensors) installed at room entrances.

[0206] (UV irradiation source) The above embodiment uses an excimer lamp as an example of an ultraviolet irradiation source, but is not limited to this and includes any ultraviolet irradiation source, such as an ultraviolet LED that emits ultraviolet light in the 222 nm band.

[0207] (Control of ultraviolet radiation in the 254nm or 265nm band) The above embodiment took the example of irradiating with ultraviolet light in the 222nm band, which has a high inactivation effect on pathogens and is harmless to the human body. However, in other embodiments, when irradiating with ultraviolet light in the 254nm band or 265nm band, which has a high inactivation effect on pathogens and is harmful to the human body, the irradiation start condition shall be set to control the irradiation to start when it is determined that no person is present.

[0208] (Ultraviolet irradiation control device) In the above-described embodiment, the facility management device 24 is provided with the functions of the observation unit 25, the control unit 26, and the monitor unit 28. However, it does not prevent the observation unit 25, the control unit 26, and the monitor unit 28 from being provided in separate devices that are communicatively connected, or in devices of other systems installed in the target facility.

[0209] (Others) Further, the present invention includes appropriate modifications that do not impair its objects and advantages, and is not limited by the numerical values shown in the above-described embodiment.

Explanation of Reference Numerals

[0210] 10: Door 12: Ultraviolet irradiation source 14: Electric lock 16: Card reader 18: Open / close detector 20: Illuminance sensor 22: Relay device 24: Facility management device 25: Observation unit 26: Control unit 28: Monitor unit 30: Entrance / exit management device 31: Center device 32: Client device 35: LAN line 46: Drive circuit unit 48: Lamp unit 50: Dimming control unit 52: Commercial AC power source 54: AC / DC converter 56: High-frequency oscillator 60: Excimer lamp 62: Outer tube 64: Inner tube 66: Mesh electrode 68: Metal electrode 74: Lamp cover 76: Cooling block 78: Mirror 80: Quartz window 82: Ultraviolet light receiving unit 84: Sensor control unit 86,92: Communication unit 88,90: Antenna 94: Relay Control Unit 96: Transmission section 98: Irradiation level processing unit 100: Irradiation start condition judgment section 102: Timer 104: Target Level Setting Section 105: Irradiation level integration unit 106: Target irradiation period calculation unit 108: Comparison Section 112: Irradiation period setting section 114: Target irradiation level setting unit 116: Deviation Calculation Section 118: Output section 120: UV irradiation map screen 122: Entrance / Exit Area 124: 1st Administrative Area 126: Second Administrative Area 128: Reception Area 130: Meeting Area 132: Control Table 140: Motion sensor 142: Mobile devices 144:Base station 146: Network 148: Mobile device management server 150: Short-range wireless adapter 152:OA equipment 154: Server

Claims

1. A light source that irradiates the target area with light in a wavelength range that inactivates a specified pathogen, An observation unit that observes the level of light received by an object within the target area by irradiating it with light from the light source, A control unit controls the irradiation level and / or irradiation period of the light, such that when predetermined irradiation start conditions are met, the light is irradiated from the light source, and the irradiation level and / or irradiation period is controlled based on the irradiation level observed by the observation unit during the irradiation of the light, so that the cumulative irradiation level obtained by integrating the irradiation level over time becomes a predetermined target level that inactivates the pathogen to a predetermined inactivation target. Equipped with, The control unit, If the predetermined irradiation start conditions are not met, the light source is irradiated with light at predetermined intervals, and the irradiation level and / or irradiation period of the light is controlled so that the cumulative irradiation level received by the irradiated object reaches the target level. A facility management system characterized by starting the irradiation of light fixed at a predetermined irradiation level from the light irradiation source when the predetermined irradiation start conditions are met, determining an irradiation stop timing to stop the irradiation of light based on the irradiated level and the target level observed by the observation unit during the irradiation of light, and performing control to stop the irradiation of light when the irradiation stop timing arrives.

2. In the facility management system described in claim 1, The facility management system is characterized in that, during the irradiation of light, the control unit determines that the irradiation stop timing has arrived when the accumulated irradiation level, obtained by accumulating the irradiation level observed by the observation unit over time, reaches the target level, and stops the irradiation of light.

3. In the facility management system described in claim 1, The facility management system is characterized in that the control unit determines the target irradiation period by dividing the target level by the irradiation level observed by the observation unit at a predetermined timing immediately after the start of light irradiation, and when the elapsed time since the start of light irradiation reaches the target irradiation period, it determines that the irradiation stop timing has arrived and stops the light irradiation.

4. A light source that irradiates the target area with light in a wavelength range that inactivates a specified pathogen, An observation unit that observes the level of light received by an object within the target area by irradiating it with light from the light source, A control unit controls the irradiation level and / or irradiation period of the light, such that when predetermined irradiation start conditions are met, the light is irradiated from the light source, and the irradiation level and / or irradiation period is controlled based on the irradiation level observed by the observation unit during the irradiation of the light, so that the cumulative irradiation level obtained by integrating the irradiation level over time becomes a predetermined target level that inactivates the pathogen to a predetermined inactivation target. Equipped with, The control unit, If the predetermined irradiation start conditions are not met, the light source is irradiated with light at predetermined intervals, and the irradiation level and / or irradiation period of the light is controlled so that the cumulative irradiation level received by the irradiated object reaches the target level. A facility management system characterized by: starting irradiation of light from the light irradiation source when the predetermined irradiation start conditions are met; determining the target irradiation level to be received by the irradiation target based on a predetermined fixed irradiation period and the target level; controlling the irradiation level of the light irradiation source so that the irradiation level observed by the observation unit during the irradiation of light becomes the target irradiation level; and stopping the irradiation of light when the elapsed time since the start of irradiation of light reaches the fixed irradiation period, determining that the irradiation stop timing has arrived.

5. In the facility management system according to any one of claims 1 to 4, The facility management system is characterized in that the control unit controls the irradiation level and / or irradiation period of the light so that the cumulative irradiation level received by the irradiated object reaches a predetermined target level set according to the purpose of use and / or the risk of infection of the pathogen within the target area.

6. In the facility management system according to any one of claims 1 to 5, The facility management system is characterized in that the control unit divides the target area into a plurality of sub-regions according to the purpose of use for the irradiation target, and controls the irradiation level and / or irradiation period of the light by the light irradiation source provided for each sub-region so that the cumulative irradiation level received by each sub-region becomes a predetermined target level set according to the purpose of use of the sub-region and / or the infection risk of the pathogen.

7. In the facility management system according to any one of claims 1 to 6, The observation unit observes the irradiation level received by the irradiated object at multiple points within the target area. The facility management system is characterized in that the control unit controls the irradiation level and / or irradiation period of the light so that the cumulative irradiation level received by the irradiation target becomes the target level, based on the minimum or average value of the irradiation levels at multiple points observed by the observation unit.

8. In the facility management system according to any one of claims 1 to 7, The observation unit further observes the usage status within the target area, The facility management system is characterized in that the control unit starts irradiating light from the light source when the usage status within the target area observed by the observation unit satisfies predetermined irradiation start conditions, and controls the irradiation level and / or irradiation period of the light so that the cumulative irradiation level received by the irradiated object becomes the target level.

9. In the facility management system described in claim 8, The observation unit observes the entry and exit of people into the target area as a measure of the usage status within the target area. The facility management system is characterized in that the control unit irradiates light from the light source when a person enters the target area and / or when a person leaves the target area, and controls the irradiation level and / or irradiation period of the light so that the cumulative irradiation level received by the irradiated object becomes the target level.

10. In the facility management system described in claim 8, The observation unit observes the degree of crowding within the target area as a measure of usage within the target area. The facility management system is characterized in that the control unit controls the irradiation level and / or irradiation period of the light so that the cumulative irradiation level received by the irradiation target reaches a predetermined target level set according to the degree of crowding of people observed by the observation unit.

11. In the facility management system according to any one of claims 8 to 10, The facility management system is characterized in that the observation unit observes the usage status within the target area based on control information of the electric locks on the doors installed at the entrances and exits of the target area.

12. In the facility management system according to any one of claims 8 to 10, The facility management system is characterized in that the observation unit observes the usage status within the target area based on detection information from a human presence sensor installed in the target area.

13. In the facility management system according to any one of claims 8 to 10, The facility management system is characterized in that the observation unit observes the usage status within the target area based on location information of a mobile terminal held by a person who has entered the target area or a predetermined communication signal.

14. In the facility management system according to any one of claims 8 to 10, The facility management system is characterized in that the observation unit observes the usage status within the target area based on the operating information of the equipment installed in the target area.

15. In the facility management system according to any one of claims 1 to 14, The observation unit is equipped with an illuminance sensor for observing the irradiation of the light, The aforementioned illuminance sensor is Battery power and A light-receiving element that receives light from the aforementioned light source and converts it into an electrical signal, A processing unit that processes the electrical signal output from the light-receiving element and outputs a signal including the illuminance, A communication unit that transmits a signal including the illuminance output from the processing unit to the control unit, A facility management system characterized by having the following features.

16. In the facility management system according to any one of claims 1 to 15, further, It includes a monitor unit that indicates the irradiation status of the light within the target area, The facility management system is characterized in that the monitoring unit notifies the irradiation status of the light within the target area based on the level of light irradiation received by the irradiated object within the target area observed by the observation unit.

17. In the facility management system according to claim 16, The facility management system is characterized in that the monitoring unit divides the target area into smaller areas according to the purpose of use and informs the facility of the light irradiation status.

18. In the facility management system according to claim 16, The facility management system is characterized in that the monitoring unit uses map information indicating the area within the target region to inform the facility of the light irradiation status.

19. In the facility management system according to any one of claims 16 to 18, The facility management system is characterized in that the monitoring unit notifies guidance information for the target area based on the light irradiation conditions observed within the target area.

20. In the facility management system described in claim 19, The facility management system is characterized in that the monitoring unit broadcasts information indicating at least one of the following as guidance information: the safety of the target area, the excess or deficiency of light irradiation in the target area, the prohibition of use of the target area, or the restriction of use of the target area.

21. In the facility management system according to any one of claims 1 to 20, The facility management system is characterized in that the light is ultraviolet light in a predetermined wavelength band, including a wavelength of 222 nm and excluding wavelengths of 254 nm and 264 nm.

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