Air stagnation improvement system and air stagnation improvement method

Abstract

This invention provides an air stagnation improvement system that can improve stagnant air in indoor environments. [Solution] The air stagnation improvement system 10 comprises an air conditioning / ventilation generation mechanism 13 that generates airflow in the room 11, an adjustment mechanism 14 that adjusts at least one of the airflow rate ratio and airflow direction at each air outlet of the airflow, a plurality of particle generators 15 that generate particles in the room 11 to diffuse tracer particles into the room 11, a plurality of tracer concentration measuring devices 16 located near the particle generators 15 that measure the tracer concentration in areas 12a to 12g in the room 11, and a stagnation determination means that determines the state of air stagnation in each area 12a to 12g in the room 11 from the decay status of the measured tracer concentration over time, and adjusts at least one of the airflow rate ratio and airflow direction at each air outlet of the airflow according to the determined state of air stagnation in each area 12a to 12g in the room 11 to improve the air stagnation in each area 12a to 12g.

Description

[Technical Field]

[0001] The present invention relates to an air stagnation improvement system and an air stagnation improvement method for improving stagnant air in a predetermined space. [Background technology]

[0002] A stagnant air monitoring system is disclosed, comprising: an imaging unit that captures images including people and objects in a room; an estimation unit that estimates the location of stagnant air in the room based on information including the arrangement of people and objects in the room captured in the images; an execution unit that controls the air conditioning equipment in the room to perform a elimination operation to eliminate stagnant air; a first storage unit that stores information relating multiple arrangement patterns of people and objects in the room and the location of stagnant air corresponding to each arrangement pattern; and a second storage unit that stores information relating multiple arrangement patterns of people and objects in the room and the operation patterns of the air conditioning equipment corresponding to each arrangement pattern (see Patent Document 1).

[0003] The estimation unit estimates the location of stagnant air by reading from the first storage unit the location of occurrence corresponding to the same or similar arrangement pattern as the arrangement pattern shown in the image. If the estimation unit estimates stagnant air, the execution unit reads from the second storage unit an operation pattern corresponding to the same or similar arrangement pattern as the arrangement pattern shown in the image, and performs a elimination operation by controlling the operation of the air conditioning equipment based on the operation pattern read. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Japanese Patent Publication No. 2022-98814 [Overview of the project] [Problems that the invention aims to solve]

[0005] The stagnation monitoring system disclosed in Patent Document 1 estimates the location of stagnant air in a room by reading the location of occurrence from the first storage unit, which corresponds to the same or similar arrangement pattern as the arrangement pattern shown in the image. However, it only estimates the location of stagnant air in a room and cannot identify the actual location in the room where stagnant air has occurred, and therefore cannot improve the stagnant air in the room that is actually occurring.

[0006] The object of the present invention is to provide an air stagnation improvement system and method that can accurately determine the state of air stagnation in each area within a given space, identify areas where air stagnation is actually occurring within the space, and improve the air stagnation in those areas. In this invention, air stagnation refers to the quality of airflow at any point in a room. (1) When the indoor air is in a state of instantaneous uniform diffusion, or (2) Based on the average value of the airflow at countless scattered measurement points in the room, it is determined whether the airflow at the target measurement point is good or bad. When the room air is in a state of instantaneous uniform diffusion, the air stagnation at all points in the room will be the same. Therefore, attempting to improve points with poor air stagnation means either (1) aiming to equalize the air stagnation in the room, or (2) if there are areas where it is acceptable to worsen the air stagnation, improving the air stagnation at the target location instead of worsening the air stagnation at a predetermined location. [Means for solving the problem]

[0007] The first premise of the present invention for solving the aforementioned problems is an air stagnation improvement system that improves stagnant air in a predetermined space.

[0008] The first feature of the present invention in the first premise described above is that the air stagnation improvement system comprises an air conditioning and ventilation mechanism that generates airflow in a space, an adjustment mechanism that adjusts at least one of the airflow rate ratio and airflow direction at each air outlet of the airflow generated in the space by the air conditioning and ventilation mechanism, a plurality of particle generators installed in a predetermined area of ​​the space that generate tracer particles in the space in order to diffuse the tracer particles into the space, a plurality of tracer concentration measuring devices located near the particle generators that measure the tracer concentration in a predetermined area of ​​the space, and a stagnation determination means that determines the state of air stagnation in a predetermined area of ​​the space from the decay status of the tracer concentration measured by the tracer concentration measuring devices over time, and the air stagnation improvement system improves the air stagnation in each area by adjusting at least one of the airflow rate ratio and airflow direction at each air outlet of the airflow according to the state of air stagnation in each area of ​​the space determined by the stagnation determination means.

[0009] An example of the present invention having the first feature described above is an air conditioning and ventilation mechanism that includes a circulation path for circulating air within a space, and a filter for collecting tracer particles is installed in the circulation path.

[0010] Another example of the present invention having the first feature described above is a system in which a particle generator and a tracer concentration measuring device are integrated, and the tracer concentration measuring device integrated with the particle generator measures the tracer concentration in the area where the particle generator is installed.

[0011] Another example of the present invention having the first feature described above is in which a predetermined integrated particulate generator and a predetermined tracer concentration measuring device are installed in a predetermined area in a space that does not interfere with other integrated particulate generators and other tracer concentration measuring devices.

[0012] Another example of the present invention having the first feature described above is in which the stagnation determination means compares the air stagnation state of each area determined from the decay status of the tracer concentration over time measured by the tracer concentration measuring devices, determines the degree of air stagnation in each area, and the adjustment mechanism adjusts at least one of the airflow rate ratio and airflow direction at each air outlet for the area in which the stagnation determination means has determined that the air stagnation state is high.

[0013] Another example of the present invention having the first feature described above is an adjustment mechanism that adjusts at least one of the airflow rate ratio and airflow direction at each air outlet for the airflow to an area so that the airflow stagnation state is reduced in an area where the stagnation determination means has determined that the air stagnation state is large.

[0014] Another example of the present invention having the first feature described above is an air stagnation improvement system which includes an output means that outputs the air stagnation state of each area in a space determined by a stagnation determination means, the output means which outputs the air stagnation state of each area in the space determined by the stagnation determination means before adjustment by an adjustment mechanism, and after the adjustment mechanism adjusts at least one of the airflow ratio and airflow direction at each air outlet for the airflow to each area of ​​the space, the output means outputs the air stagnation state of each area in the space after adjustment by the adjustment mechanism determined by the stagnation determination means.

[0015] As another example of the present invention having the first feature described above, the air stagnation improvement system adjusts at least one of the airflow ratio and airflow direction at each air outlet for the airflow to each area of ​​the space using an adjustment mechanism according to the air stagnation state of each area in the space determined by the stagnation determination means, then generates tracer particles in the space using a particle generator, measures the tracer concentration in each area of ​​the space using a tracer concentration measuring device, and repeats the procedure of determining the air stagnation state of each area in the space using the stagnation determination means.

[0016] Another example of the present invention having the first feature described above is an air conditioning and ventilation mechanism comprising an air supply mechanism for supplying air into a space and an exhaust / return air mechanism for exhausting air from the space, wherein an airflow is generated in the space by supplying air into the space with the air supply mechanism and exhausting air from the space with the exhaust / return air mechanism, and the adjustment mechanism comprises at least one of the following: an outlet airflow ratio adjustment for adjusting the outlet airflow ratio of multiple air outlets in the air supply mechanism, an outlet airflow direction adjustment for adjusting the outlet airflow direction of the air supply mechanism, and an intake airflow ratio adjustment for adjusting the intake airflow ratio of multiple air outlets in the exhaust / return air mechanism, in which order of priority among the outlet airflow ratio adjustment, outlet airflow direction adjustment and intake airflow ratio adjustment is outlet airflow ratio adjustment → outlet airflow direction adjustment → intake airflow ratio adjustment.

[0017] A second premise of the present invention for solving the aforementioned problems is an air stagnation improvement method for improving stagnant air in a predetermined space.

[0018] A second feature of the present invention in the second premise described above is that the air stagnation improvement method comprises an air conditioning / ventilation step of generating airflow in a space, an adjustment step of adjusting at least one of the airflow rate ratio and airflow direction at each air outlet of the airflow generated by the air conditioning / ventilation step, a particle generation step of generating tracer particles in the space from a plurality of particle generators installed in a predetermined area of ​​the space in order to diffuse tracer particles into the space, a tracer concentration measurement step of measuring the tracer concentration in a predetermined area of ​​the space using a plurality of tracer concentration measuring devices located near the particle generators, and a stagnation determination step of determining the state of air stagnation in a predetermined area of ​​the space from the decay status of the tracer concentration measured by the tracer concentration measurement step over time, wherein the air stagnation improvement method improves the air stagnation in each area by adjusting at least one of the airflow rate ratio and airflow direction at each air outlet of the airflow according to the state of air stagnation in each area of ​​the space determined by the stagnation determination step.

[0019] As an example of the present invention having the second feature, an air conditioning / ventilation step circulates air into said space using a circulation path, and a filter for collecting tracer fine particles is installed in the circulation path.

[0020] As another example of the present invention having the second feature, a fine particle generator and a tracer concentration measuring device are integrated, and the tracer concentration measuring device integrated with the fine particle generator measures the tracer concentration in an area where the fine particle generator is installed.

[0021] As another example of the present invention having the second feature, a predetermined integrated fine particle generator and a predetermined tracer concentration measuring device are installed in a predetermined area in a space that does not interfere with another integrated fine particle generator and another tracer concentration measuring device.

[0022] As another example of the present invention having the second feature, a stagnation determining step compares the air stagnation states of respective areas determined from the temporal attenuation status of tracer concentrations measured by said tracer concentration measuring devices, and determines the magnitude of the air stagnation state in each area, and an adjusting step adjusts at least one of the air volume ratio and the wind direction at each air outlet / inlet for airflow to an area determined to have a large air stagnation state by the stagnation determining step.

[0023] As another example of the present invention having the second feature, an adjusting step adjusts at least one of the air volume ratio and the wind direction at each air outlet / inlet for airflow to the area determined to have a large air stagnation state by the stagnation determining step, so that the air stagnation state in said area is reduced.

[0024] Another example of the present invention having the second feature described above is an air stagnation improvement system which includes an output step that outputs the air stagnation state of each area in the space determined by the stagnation determination step, wherein the output step outputs the air stagnation state of each area in the space determined by the stagnation determination step before adjustment by the adjustment step, and after adjusting at least one of the airflow ratio and airflow direction at each air outlet for the airflow to each area of ​​the space by the adjustment step, outputs the air stagnation state of each area in the space determined by the stagnation determination step after adjustment by the adjustment step.

[0025] As another example of the present invention having the second characteristic described above, the air stagnation improvement method involves adjusting at least one of the airflow ratio and airflow direction at each air outlet for the airflow to each area of ​​the space in the adjustment step according to the air stagnation state of each area of ​​the space determined by the stagnation determination step, then generating tracer particles in the space by the particle generation step, measuring the tracer concentration in each area of ​​the space by the tracer concentration measurement step, and determining the air stagnation state of each area of ​​the space by the stagnation determination step, and repeating these steps.

[0026] Another example of the present invention having the second characteristic described above is an air conditioning and ventilation process in which an airflow is generated in a space by supplying air into the space and exhausting air from the space, and the adjustment process is at least one of the following: an outlet airflow ratio adjustment process that adjusts the outlet airflow ratio of the air supplied into the space at multiple air outlets, an outlet airflow direction adjustment process that adjusts the outlet airflow direction of the air supplied into the space, and an intake airflow ratio adjustment process that adjusts the intake airflow ratio of the air exhausted from the space at multiple air outlets, and the priority order of the outlet airflow ratio adjustment process, the outlet airflow direction adjustment process and the intake airflow ratio adjustment process is in the order of outlet airflow ratio adjustment process → outlet airflow direction adjustment process → intake airflow ratio adjustment process. [Effects of the Invention]

[0027] According to the air stagnation improvement system and method of the present invention, the tracer concentration in a predetermined area within a space is measured, the air stagnation state in the predetermined area within the space is determined from the decay status of the measured tracer concentration over time, and at least one of the airflow rate ratio and airflow direction at each air outlet for each area is adjusted according to the determined air stagnation state in each area within the space, thereby improving the air stagnation in each area. This makes it possible to accurately determine the air stagnation state in each area within a predetermined space, identify areas where air stagnation is actually occurring within the space, and improve the air stagnation in those areas.

[0028] The air stagnation improvement system and method include a circulation path for circulating air within a space, and a filter for collecting tracer particles is installed in the circulation path. Since the filter collects tracer particles, the tracer concentration in the space can be reduced to 0 by the filter. Tracer particles are then generated again into the space from a particle generator to diffuse the tracer particles, and the tracer concentration in a predetermined area of ​​the space can be measured. The stagnation state of the air in the predetermined area of ​​the space can be re-determined from the decay status of the measured tracer concentration over time, making it possible to determine the stagnation state of the air multiple times in a time series and to improve the air stagnation in areas where air stagnation occurs in environments with different conditions.

[0029] The air stagnation improvement system and method integrate a particulate matter generator and a tracer concentration measuring device. The tracer concentration measuring device, integrated with the particulate matter generator, measures the tracer concentration in the area where the particulate matter generator is installed. Therefore, the tracer concentration in a predetermined area can be accurately measured by the tracer concentration measuring device integrated with the particulate matter generator, and the state of air stagnation in a predetermined area within a space can be accurately determined from the decay of the measured tracer concentration over time. The air stagnation improvement system and method can accurately determine the state of air stagnation in a predetermined area within a space from the tracer concentration accurately measured by the tracer concentration measuring device. Therefore, by adjusting at least one of the airflow rate ratio and airflow direction at each air outlet in the area where air stagnation is occurring, the air stagnation in that area can be reliably improved.

[0030] The air stagnation improvement system and method are installed in a predetermined area within a space where an integrated predetermined particulate generator and a predetermined predetermined tracer concentration measuring device do not interfere with other integrated particulate generators and other tracer concentration measuring devices. Therefore, the predetermined particulate generator is not affected by other particulate generators, ensuring that tracer particles are reliably generated in the predetermined area, and the predetermined tracer concentration measuring device is not affected by other tracer concentration measuring devices, ensuring that the tracer concentration in the predetermined area is accurately measured. The air stagnation improvement system and method can accurately determine the state of air stagnation in a predetermined area within a space from the tracer concentration accurately measured by the tracer concentration measuring device, and can reliably improve the air stagnation in an area where air stagnation is occurring by adjusting at least one of the airflow ratio and airflow direction at each air outlet.

[0031] The air stagnation improvement system and method compare the air stagnation state of each area, determined from the decay of tracer concentrations over time as measured by the tracer concentration measuring devices, and relatively determine the magnitude of the air stagnation state in each area. Therefore, by comparing the air stagnation states of these areas, the magnitude of the air stagnation state in each area can be accurately determined. The air stagnation improvement system and method adjust at least one of the airflow rate ratio and airflow direction at each air outlet for areas where the air stagnation state is large, determined by comparing the air stagnation states of the areas, so that the air stagnation state in areas with large air stagnation can be reliably improved.

[0032] The air stagnation improvement system and method adjust at least one of the airflow ratio and airflow direction at each air outlet in an area so that the air stagnation is reduced in areas where the air stagnation is determined to be high, thereby reliably reducing air stagnation in areas with high air stagnation and making the air stagnation uniform in each area of ​​the space.

[0033] The air stagnation improvement system and method output the air stagnation state before adjusting at least one of the airflow ratio and airflow direction at each air intake for each area of ​​the space, and also output the air stagnation state after adjusting at least one of the airflow ratio and airflow direction at each air intake for each area of ​​the space. This allows users to check the air stagnation state in each area of ​​the space and determine which areas are experiencing air stagnation. The air stagnation improvement system and method also allow users to check the air stagnation state in each area after improving the air stagnation, and determine whether the air stagnation has been improved in each area.

[0034] The air stagnation improvement system and method adjust at least one of the airflow ratio and airflow direction at each air outlet in the airflow generated in each area of ​​the space, then generate airflow in the space, generate tracer particles in the space, measure the tracer concentration in each area of ​​the space, and repeat the procedure to determine the state of air stagnation in each area. As a result, the state of air stagnation in each area of ​​the space can be constantly monitored, the air stagnation in each area can be continuously improved, and a state in which no air stagnation occurs in each area of ​​the space can be maintained.

[0035] The air stagnation improvement system and method perform at least one of the following: an outlet airflow ratio adjustment (outlet airflow ratio adjustment process) which adjusts the outlet airflow ratio of multiple air inlets in the air supply mechanism; an outlet airflow direction adjustment (outlet airflow direction adjustment process) which adjusts the airflow direction of the air supply mechanism; and an intake airflow ratio adjustment (intake airflow ratio adjustment process) which adjusts the intake airflow ratio of multiple air inlets in the exhaust / return air mechanism. The priority order among the outlet airflow ratio adjustment (outlet airflow ratio adjustment process), outlet airflow direction adjustment (outlet airflow direction adjustment process), and intake airflow ratio adjustment (intake airflow ratio adjustment process) is in the order of outlet airflow ratio adjustment (outlet airflow ratio adjustment process) → outlet airflow direction adjustment (outlet airflow direction adjustment process) → intake airflow ratio adjustment (intake airflow ratio adjustment process). Therefore, the air stagnation in areas where air stagnation occurs can be reliably improved. [Brief explanation of the drawing]

[0036] [Figure 1] A diagram illustrating an example of a system for improving air quality in a room (space). [Figure 2] A graph showing an example of the decay of tracer concentration over time in tracer microparticles. [Figure 3] A diagram illustrating the operation of air conditioning and ventilation in an air stagnation improvement system (air stagnation improvement method). [Figure 4] A diagram illustrating the particulate matter generation operation in an air stagnation improvement system (air stagnation improvement method). [Figure 5]A diagram showing an example of the state of stagnant air in a designated area of ​​a room, as displayed on the screen. [Figure 6] A flowchart illustrating each step in the air quality improvement method. [Figure 7] A diagram showing an example of the adjustment process using an adjustment mechanism. [Figure 8] A diagram showing another example of the air quality in a room area as displayed on the screen. [Figure 9] A diagram showing another example of the adjustment process using an adjustment mechanism. [Figure 10] A diagram showing another example of the adjustment process using an adjustment mechanism. [Modes for carrying out the invention]

[0037] Referring to the attached drawings, the details of the air stagnation improvement system 10 and the air stagnation improvement method according to the present invention are as follows. Figure 1 is a configuration diagram showing an example of the air stagnation improvement system 10 in a room 11 (space), and Figure 2 is a graph showing an example of the decay of tracer concentration over time. The graph in Figure 2 shows the tracer concentration (C) with the vertical axis being dimensionless. p Let the horizontal axis be time (t). The dimensionless tracer concentration (C) p The value of ') can be found using the following formula.

[0038] Formula:(C p ´)(t)=((C p ´)(t)-C0) / (C s -C0) C p (t): Tracer concentration at point P at time t C0: Bagland concentration C s :decay start concentration The air stagnation improvement system 10 (air stagnation improvement method) uses tracer particles (tracers) to determine the air stagnation state in each area 12a to 12g of a predetermined room 11 (space), and adjusts at least one of the airflow ratio and airflow direction at each air inlet of the airflow (air) generated in each area 12a to 12g according to the determined air stagnation state in each area 12a to 12g, thereby improving (eliminating) the air stagnation in each area 12a to 12g. Air stagnation refers to the quality of airflow at any point within the room 11. Each area 12a to 12g is arbitrarily set according to the environment and operating conditions such as the volume of the room 11, the layout of the room 11 (position of chairs, desks, various electronic devices, bookshelves, partitions, etc. placed in the room 11), the operating conditions of the heating and cooling system, and the movement of people within the room 11.

[0039] The air stagnation improvement system 10 in room 11 of Figure 1 includes an air conditioning / ventilation mechanism 13, an adjustment mechanism 14, a particulate matter generator 15, a tracer concentration measuring device 16, a stagnation determination means, and an output means. The air stagnation improvement method consists of an air conditioning / ventilation process, a particulate matter generation process, a tracer concentration measurement process, a stagnation determination process, an adjustment process, and an output process. The air conditioning / ventilation mechanism 13, the adjustment mechanism 14, the particulate matter generator 15, and the tracer concentration measuring device 16 are controlled by a controller (not shown).

[0040] The controller is a physical computer that has a central processing unit (CPU or MPU) and memory (main memory and cache memory), operates with an independent operating system (OS), and has a large-capacity storage area (hard disk). A display 33 (output device) is connected to the controller via an interface (wireless or wired). The controller's memory stores an application that performs the air stagnation improvement operation in the air stagnation improvement system 10 (air stagnation improvement method).

[0041] Although Figure 1 shows one display 33, multiple displays 33 are connected to the controller via the master unit 35. Tablets and smartphones can also be used as output devices. The central processing unit of the controller launches applications stored in memory based on control by the operating system (OS) and performs air stagnation improvement operations according to those applications.

[0042] Cloud computing can also be used as a controller. The cloud can utilize Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS). By using the cloud, IT resources can be accessed on demand via the internet from the cloud service platform. The cloud is a virtual computer that has a virtual CPU or virtual MPU (central processing unit), virtual main memory and virtual cache memory (virtual memory), and operates with an independent operating system (virtual OS), generating a large-capacity virtual storage area. The controller (physical computer or virtual computer) executes stagnation detection means (stagnation detection process) and output means (output process).

[0043] The air conditioning and ventilation system 13 includes an air supply mechanism 17 (air supply path) that supplies air into the room 11 (space) and an exhaust / return air mechanism 18 (exhaust / return air path) that exhausts air from the room 11. The air supply mechanism 17 and the exhaust / return air mechanism 18 are connected to the air conditioner 19. In the air conditioning and ventilation system 13, air is supplied into the room 11 by the air supply mechanism 17, and air is exhausted (inhaled) from the room 11 by the exhaust / return air mechanism 18, thereby generating airflow within the room 11.

[0044] The air supply mechanism 17 includes an air supply duct 20 located downstream of the air conditioner 19, a plurality of air supply dampers 21 (motor dampers) installed in the air supply duct 20, and a plurality of air supply ports 22 connected to the air supply duct 20. The exhaust / return air mechanism 18 includes an outside air duct 23 located upstream of the air conditioner 19, an exhaust duct 24 located upstream of the air conditioner 19, a return air duct 25a and an exhaust / return air duct 25b located upstream of the air conditioner 19, a plurality of exhaust / return air dampers 26 (motor dampers) installed in the exhaust / return air duct 25b, and a plurality of exhaust / return air ports 27 connected to the exhaust / return air duct 25b.

[0045] The air conditioner 19 is installed in the ceiling space of the room 11. The air conditioner 19 has an air supply fan 28, a coil 36, and a filter 29. The control unit of the air conditioner 19 is connected to a controller via a signal line (wired or wireless), and its start / stop and output are controlled by the controller. The air conditioner 19 removes impurities (dust, bacteria, viruses, etc.) contained in the air in the room 11 using the filter 29 (e.g., a HEPA filter), converting it into clean air, and also captures tracer particles contained in the air in the room 11. The air conditioner 19 generates an airflow in the room 11 from air flowing in one direction (forward and backward) by supplying air at a predetermined discharge volume ratio from multiple air supply ports 22 (multiple air control ports).

[0046] One end of the supply air duct 20 is connected to the air conditioner 19. The supply air duct 20 supplies air from the air conditioner 19 into the room 11. The supply air duct 20 branches into multiple sections toward the room 11, and the other ends of these branched supply air ducts 20 are connected to each air inlet 22. These supply air ducts 20 supply air to each area 12a to 12g within the room 11.

[0047] These air supply dampers 21 (motor dampers) are installed in the branched air supply ducts 20. Each air supply damper 21 adjusts the airflow ratio (discharge airflow ratio) of the air flowing through the air supply ducts 20 by changing its opening.

[0048] These air intake vents 22 are installed on the ceiling of the room 11. Each air intake vent 22 is fitted with a louver 30 (airflow adjustment plate) that adjusts the direction of the airflow (outlet airflow direction) supplied into the room 11. A servo motor is connected to the louver 30 to change its angle. By adjusting the angle of the louver 30 using the servo motor, the direction of the airflow (outlet airflow direction) supplied to each area 12a to 12g within the room 11 is changed.

[0049] The outside air duct 23 takes in outside air from outside the room 11 and supplies it to the air conditioner 19. One end of the outside air duct 23 is connected to the outside air intake, and the other end is connected to the air conditioner 19. An outside air fan 31 is installed on one end of the outside air duct 23. The control unit of the outside air fan 31 is connected to a controller via a signal line, and its starting and stopping are controlled by the controller. In the outside air duct 23, a predetermined amount of outside air is supplied to the air conditioner 19 by the outside air fan 31.

[0050] The return air duct 25a returns the air from room 11 supplied by the exhaust / return air duct 25b to the air conditioner 19. The exhaust duct 24 exhausts a portion of the air from room 11 supplied by the exhaust / return air duct 25b to the outside of room 11. One end of the exhaust duct 24 is connected to an exhaust port, and the other end is connected to the exhaust / return air duct 25b. An exhaust fan 32 is installed on one end of the exhaust duct 24. The control unit of the exhaust fan 32 is connected to a controller via a signal line, and its starting and stopping are controlled by the controller. In the exhaust duct 24, a predetermined amount of indoor air is exhausted to the outside of room 11 by the exhaust fan 32.

[0051] The return air duct 25a has one end connected to the exhaust / return air duct 25b and the other end connected to the air conditioner 19. The exhaust / return air duct 25b takes in air from each area 12a to 12g in the room 11 and flows that air into the return air duct 25a, while also allowing a portion of that air to flow into the exhaust duct 24. The exhaust / return air duct 25b branches into multiple sections toward the room 11, and the other ends of these branched exhaust / return air ducts 25b are connected to each exhaust / return air vent 27. These exhaust / return air vents 27 are installed on the ceiling of the room 11.

[0052] These exhaust / return air dampers 26 (motor dampers) are installed in the branched exhaust / return air ducts 25b. Each exhaust / return air damper 26 adjusts the airflow ratio (intake airflow ratio) of the air flowing through the exhaust / return air ducts 25b by changing its opening degree. The control unit of each exhaust / return air damper 26 is connected to a controller via a signal line, and its opening degree is controlled by the controller. These exhaust / return air dampers 26 adjust the airflow ratio (intake airflow ratio) of the air exhausted (intake) from each area 12a to 12g in the room 11 for each area 12a to 12g. In the air conditioning / ventilation mechanism 13, the return air duct 25a, exhaust / return air duct 25b, exhaust duct 24, air conditioner 19, and supply air duct 20 form a circulation path that circulates the air in the room 11. The air conditioning and ventilation system 13 circulates air within the room 11 (the space) using a circulation path.

[0053] The adjustment mechanism 14 performs at least one of the following: outlet airflow ratio adjustment (outlet airflow ratio adjustment process at multiple air outlets) which adjusts the outlet airflow ratio of the air supplied from the air intake ports 22 of the air supply mechanism 17 at multiple air outlets; outlet airflow direction adjustment (outlet airflow direction adjustment process) which adjusts the outlet airflow direction of the air supplied from the air intake ports 22 of the air supply mechanism 17 at multiple air outlets; and intake airflow ratio adjustment (intake airflow ratio adjustment process at multiple air outlets) which adjusts the intake airflow ratio of the air exhausted (inhaled) from the exhaust / return air ports 27 of the exhaust / return air mechanism 18 at multiple air outlets. In the adjustment mechanism 14, the priority order among the discharge air volume ratio adjustment (discharge air volume ratio adjustment process), discharge air direction adjustment (discharge air direction adjustment process), and suction air volume ratio adjustment (suction air volume ratio adjustment process) is 1. Discharge air volume ratio adjustment (discharge air volume ratio adjustment process) → 2. Discharge air direction adjustment (discharge air direction adjustment process) → 3. Suction air volume ratio adjustment (suction air volume ratio adjustment process).

[0054] In the adjustment of the airflow ratio at multiple air outlets (the process of adjusting the airflow ratio at multiple air outlets), the controller adjusts the opening degree of the supply air dampers 21 installed in each supply air duct 20, thereby adjusting the airflow ratio of the air passing through each supply air damper 21, and adjusting the airflow volume supplied to each area 12a to 12g in the room 11. In the adjustment of the airflow direction at multiple air outlets (the process of adjusting the airflow direction at multiple air outlets), the controller adjusts the angle of the louvers 30 (airflow adjustment plates) to adjust the airflow direction (direction of the airflow) supplied to each area 12a to 12g in the room 11. In the adjustment of the intake air volume ratio in multiple air inlets (the process of adjusting the intake air volume ratio in multiple air inlets), the controller adjusts the opening degree of the exhaust / return dampers 26 installed in each exhaust / return duct 25b, thereby adjusting the air volume ratio of the air passing through each exhaust / return damper 26, and adjusting the air volume of the air exhausted (returned) from each area 12a to 12g in the room 11.

[0055] These particulate generators 15 diffuse minute particles 34, including tracer particles, into a chamber 11 (space) of a predetermined volume. An ultrasonic humidifier is used in these particulate generators 15. The ultrasonic humidifier generates ultrasonic waves (vibrations) using an ultrasonic transducer installed at the bottom of the tank. These vibrations burst on the surface of the water contained in the tank, creating minute liquid droplets (mist), and these minute particles 34 are diffused into the air (room) using the physical phenomenon of concentration diffusion. The control unit of the ultrasonic humidifier is connected to a controller via a signal line (wired or wireless), and its start / stop and output are controlled by the controller.

[0056] As part of the particulate matter generators 15, in addition to ultrasonic humidifiers that generate minute particulate matter 34 including tracer particulate matter in the room temperature range without using a special heat source, other options include steam-type (heated) humidifiers that heat water with a heater to evaporate it and then use a fan to diffuse the water vapor into the air (room), hybrid humidifiers that combine the steam-type and ultrasonic-type humidifiers, heated evaporative humidifiers that pass warm air created by a heater and fan through a water-soaked filter to vaporize the water and diffuse the water vapor into the air (room), and evaporative humidifiers that pass air created by a fan through a water-soaked filter to evaporate the water and diffuse the water vapor into the air (room). All of these are easy to install and handle.

[0057] In Figure 1, ultrasonic humidifiers are installed in each of the areas 12a to 12g inside Room 11. There are no particular restrictions on the location or number of ultrasonic humidifiers (particulate generators 15) installed inside Room 11. The location and number of humidifiers are determined based on the environment and operating conditions, such as the volume of Room 11, the layout of Room 11, the placement of chairs, desks, various electronic devices, bookshelves, partitions, etc. inside Room 11, the operating conditions of the heating and cooling system, and the flow of people inside Room 11.

[0058] Each ultrasonic humidifier 15 (particulate generator 15) is assigned, for example, a humidifier identification number (humidifier identifier), which is stored on the controller's hard disk. The humidifier identification number (humidifier identifier) ​​can be the individual identification number or model number of each ultrasonic humidifier, or the controller can generate a unique identifier for each ultrasonic humidifier and use the generated identifier as the humidifier identification number.

[0059] The fine particles 34 used in ultrasonic humidifiers 15, steam humidifiers, hybrid humidifiers, and evaporative humidifiers are tap water that is friendly to humans (in some cases, PAO used for filter testing may be used). Tap water is supplied to the tanks of these ultrasonic humidifiers 15.

[0060] The air stagnation improvement system 10 and the air stagnation improvement method utilize an ultrasonic humidifier or other humidifier as the particulate matter generator 15. By installing the humidifier inside the room 11, minute particulate matter 34 can be easily diffused to each area 12a to 12g of the room 11 using the humidifier, and tracer particulate matter can be easily diffused to each area 12a to 12g of the room 11 along with the diffusion of minute particulate matter 34. The air stagnation improvement system 10 and the air stagnation improvement method use tap water as the water for the humidifier, so there is no need to prepare a special aqueous solution. Tap water can be supplied to the humidifier from the water pipe, thus simplifying and reducing the cost of the air stagnation improvement system 10.

[0061] The tracer concentration measuring device 16 measures numerical data (number data or concentration data) of tracer particles diffused in each area 12a to 12g of the room 11 (space). The tracer concentration measuring device 16 uses a light scattering type airborne particle counter 16a (particle measuring instrument) that has a measurement range that includes the particle size of tracer particles diffused in each area 12a to 12g of the room 11 by an ultrasonic humidifier (or other humidifier). Alternatively, the tracer concentration measuring device 16 uses a PM2.5 measuring instrument 16b that has a measurement range that includes the particle size of tracer particles diffused in each area 12a to 12g of the room 11 by an ultrasonic humidifier (or other humidifier).

[0062] In the tracer concentration measuring device 16, the particle generator 15 (ultrasonic humidifier or other humidifier) ​​diffuses fine particles 34 containing tracer particles into each area 12a to 12g in the room 11. After the particle generator 15 diffuses the fine particles 34 containing tracer particles into each area 12a to 12g in the room 11 for a predetermined time, the particle generator 15 (ultrasonic humidifier or other humidifier) ​​is stopped, and numerical data (number data or concentration data) of the tracer particles is measured during a predetermined measurement time.

[0063] The light-scattering airborne particle counter 16a takes in air from each area 12a to 12g within the chamber 11 through an inlet nozzle and irradiates the taken-in air with laser light. When the laser light strikes tracer particles contained in the air (suspended in space), the light is scattered. This scattered light is detected by a photodiode and converted into an electrical signal to measure the number of tracer particles (particle count data). The particle size can be determined from the voltage, and the number of tracer particles (particles / m³) in the air of each area 12a to 12g within the chamber 11 can be determined from the number of waveforms. 3 Measure the tracer concentration.

[0064] Furthermore, in addition to a light scattering type airborne particle counter, a light blocking type particle counter can be used. The light blocking type particle counter has a light source and a light receiving element arranged facing each other, and converts light into an electrical signal. When tracer fine particles contained in the air (floating in the space) in each of the areas 12a to 12g in the chamber 11 pass through the light, the light received by the light receiving element is weakened. The amount of attenuation of the electrical signal corresponds to the particle diameter of the tracer fine particles, and the number of times light is blocked corresponds to the number data (particles / m 3 ) of the tracer fine particles.

[0065] An automatic PM2.5 measuring device is used for the PM2.5 measuring instrument 16b. The automatic PM2.5 measuring device adopts a light scattering method in which, after particles sucked by a pump are classified using an impactor, the weight concentration is calculated using the intensity of light scattering when light is irradiated onto the classified particles. In addition, as a combined method, the weight concentration (tracer concentration) of PM2.5 is calculated by a β-ray absorption method, in which classified particles are collected on a paper, β-rays are irradiated onto the collected particles, and the weight concentration is calculated from the transmittance of the β-rays.

[0066] In the impactor, particles sucked from the outside are classified with a collection efficiency of 50% by four selected types of impactors (PM1, PM2.5, PM4, PM10). After classification, 1 / 3 of the flow rate of particles that have entered the interior from the suction port is used as sheath air through a filter, and the remaining particles are sent to a detector. The sheath air enters the detector so as to cover the air containing the particles to be measured. Stable accuracy is ensured because the detector is protected by the sheath air.

[0067] Particles that have entered the detector pass through a laser, and the scattered light scattered at that time is detected by a photodetector. The scattered light intensity depends on the particle concentration, particle size distribution, refractive index, shape, and the like. A signal from the photodetector is instantly converted into a weight concentration, and then stored (memorized) in an internal logger. The particles after detection are collected by a gravimetric filter and used for measurement of weight and components. Furthermore, a calibration coefficient is used to bring the measurement result closer to a value with higher accuracy.

[0068] The ultrasonic humidifier 15 or other humidifier (particulate matter generator 15) and the light-scattering airborne particle counter 16a or PM2.5 measuring instrument 16b (tracer concentration measuring instrument 16) are integrated into a single unit, and the two units 15 and 16 are adjacent to each other. Specifically, the ultrasonic humidifier 15 or other humidifier and the light-scattering airborne particle counter 16a or PM2.5 measuring instrument 16b are housed in the same enclosure (case), and they are movable simultaneously. Furthermore, the ultrasonic humidifier 15 or other humidifier and the light-scattering airborne particle counter 16a or PM2.5 measuring instrument 16b share a common control unit, which operates both the ultrasonic humidifier 15 or other humidifier and the light-scattering airborne particle counter 16a or PM2.5 measuring instrument 16b. The control unit of the ultrasonic humidifier 15 or other humidifier and the light-scattering airborne particle counter 16a or PM2.5 measuring instrument 16b is connected to a controller via a signal line (wired or wireless), and the start and stop of the ultrasonic humidifier 15 or other humidifier and the light-scattering airborne particle counter 16a or PM2.5 measuring instrument 16b are controlled by the controller.

[0069] In the air stagnation improvement system 10 (air stagnation improvement method), the tracer concentration in each area 12a to 12g within the room 11 where the ultrasonic humidifier 15 or other humidifier (particulate matter generator 15) is installed is measured by a light-scattering type airborne particle counter 16a or PM2.5 measuring instrument 16b (tracer concentration measuring instrument 16) integrated with the ultrasonic humidifier 15 or other humidifier. In the air stagnation improvement system 10 (air stagnation improvement method), the integrated predetermined ultrasonic humidifier 15 or other humidifier (particulate matter generator 15) and the predetermined light-scattering type airborne particle counter 16a or PM2.5 measuring instrument 16b (tracer concentration measuring instrument 16) are installed in areas 12a to 12g within the room 11 that do not interfere with other integrated ultrasonic humidifiers 15 or other humidifiers and other light-scattering type airborne particle counters 16a or PM2.5 measuring instruments 16b.

[0070] The air stagnation improvement system 10 and the air stagnation improvement method measure the tracer concentration in each area 12a to 12g using a light-scattering type airborne particle counter 16a or PM2.5 measuring instrument 16b (tracer concentration measuring device 16) integrated with an ultrasonic humidifier 15 or another humidifier (particulate matter generator 15). Therefore, the tracer concentration in a predetermined area 12a to 12g can be accurately measured by the ultrasonic humidifier 15 or another humidifier integrated with a light-scattering type airborne particle counter 16a or PM2.5 measuring instrument 16b.

[0071] The air stagnation improvement system 10 and the air stagnation improvement method are installed in areas 12a to 12g in which an integrated predetermined ultrasonic humidifier 15 or other humidifier (particulate matter generator 15) and a predetermined light-scattering airborne particle counter 16a or PM2.5 measuring instrument 16b (tracer concentration measuring instrument 16) are not interfered with by other integrated ultrasonic humidifiers 15 or other humidifiers and other light-scattering airborne particle counters 16a or PM2.5 measuring instruments 16b. Therefore, the predetermined ultrasonic humidifier 15 or other humidifier is not affected by other ultrasonic humidifiers 15 or other humidifiers, and fine particles 34 for diffusing tracer fine particles in the predetermined areas 12a to 12g can be reliably generated. The predetermined light-scattering airborne particle counter 16a or PM2.5 measuring instrument 16b is not affected by other light-scattering airborne particle counters 16a or PM2.5 measuring instruments 16b, and the tracer concentration in the predetermined areas 12a to 12g can be accurately measured.

[0072] The controller's (computer's) hard disk contains the volume of chamber 11 (space) in Figure 1, "m³ 3 ", the ratio of intake air volume at multiple air outlets for conditioned air from room 11 "m 3 " / s", the amount of liquid required to generate fine particles 34 containing tracer particles generated from one ultrasonic humidifier 15 or another humidifier "m 3The following information is stored in Room 11, associated with the Room Specific Identifier (Room Specific Identifier) ​​of Room 11: the number of ultrasonic humidifiers 15 or other humidifiers installed in Room 11 and their identification numbers, the operating time of the ultrasonic humidifiers 15 or other humidifiers (the time it takes for fine particles 34 to be generated from the ultrasonic humidifiers 15 or other humidifiers), the number of light-scattering airborne particle counters 16a or PM2.5 automatic measuring devices 16b installed in Room 11, and the identification numbers of the measuring devices 16a or PM2.5 automatic measuring devices 16b. Furthermore, each area 12a to 12g is stored on the controller's hard disk, associated with an area specific identification number (area specific identifier) ​​that identifies those areas 12a to 12g. Fine particles 34 refer to, for example, water droplets generated from humidifiers or nozzles and solid particles remaining after those water droplets evaporate in the air, mixed water droplets of oil and water such as simulated droplets, and solid particles such as dust and soil.

[0073] The controller's hard disk stores the opening degree of each supply air damper 21, the angle of each louver 30, and the opening degree of each exhaust / return air damper 26 in association with the room-specific identification number (room-specific identifier) ​​and area-specific identification number (area-specific identifier) ​​during normal air conditioning and ventilation operation. The controller's hard disk also stores the opening degree of the supply air damper 21 installed in the supply air duct 20 that supplies air to areas 12a to 12g where air stagnation is judged to be high (a larger opening degree or maximum opening degree than the opening degree during normal air conditioning and ventilation operation), and the opening degree of the supply air damper 21 installed in the supply air duct 20 that supplies air to areas 12a to 12g where air stagnation is judged to be low (a smaller opening degree or minimum opening degree than the opening degree during normal air conditioning and ventilation operation).

[0074] The controller's hard disk stores the angles of the louvers 30 installed at the air intake vents 22 in areas 12a to 12g where air stagnation is judged to be high, the opening degree of the exhaust / return damper 26 installed at the exhaust / return damper 26 that exhausts air from areas 12a to 12g where air stagnation is judged to be high (an opening degree greater than the opening degree for normal air conditioning / ventilation operation or the maximum opening degree), and the opening degree of the exhaust / return damper 26 installed at the exhaust / return damper 26 that exhausts air from areas 12a to 12g where air stagnation is judged to be low (an opening degree smaller than the opening degree for normal air conditioning / ventilation operation or the minimum opening degree).

[0075] The volume of room 11, the ratio of intake air volume from multiple air inlets of the conditioned air from room 11, the amount of liquid required to generate minute particles 34 including tracer particles generated from the ultrasonic humidifier 15 or other humidifiers, the number of ultrasonic humidifiers 15 or other humidifiers installed, the operating time of the ultrasonic humidifiers 15 or other humidifiers (the generation time of particles 34 generated from the ultrasonic humidifiers 15 or other humidifiers), and the number of light scattering type airborne particle counters 16a or PM2.5 automatic measuring devices 16b installed can be input to the controller using input devices such as a touch panel, keyboard, or mouse, and these can be changed as appropriate.

[0076] The stagnation determination means (stagnation determination step) performed by the controller determines the stagnation state of the air in predetermined areas 12a to 12g within the room 11 based on the decay status of tracer concentrations over time measured by the light scattering type airborne particle counters 16a or the PM2.5 automatic measuring devices 16b. The controller compares the stagnation state of the air in each area 12a to 12g determined from the decay status of tracer concentrations over time measured by the light scattering type airborne particle counters 16a or the PM2.5 automatic measuring devices 16b, and determines the degree of stagnation in each area 12a to 12g.

[0077] Figure 2 illustrates the cases in which the tracer concentration measured by the light scattering type airborne particle counter 16a or the PM2.5 automatic measuring device 16b (tracer concentration measuring device 16) decreases at a steep rate in a predetermined area 12a to 12g, the tracer concentration measured by the light scattering type airborne particle counter 16a or the PM2.5 automatic measuring device 16b decreases at a gentle rate in a predetermined area 12a to 12g, and the tracer concentration measured by the light scattering type airborne particle counter 16a or the PM2.5 automatic measuring device 16b decreases at an average rate that is intermediate between a steep rate and a gentle rate in a predetermined area 12a to 12g.

[0078] The controller, referring to Figure 2, determines that air stagnation is low in areas 12a to 12g where the tracer concentration measured by the light scattering airborne particle counter 16a or the PM2.5 automatic measuring device 16b (tracer concentration measuring device 16) is decreasing at a steep gradient. It determines that air stagnation is high in areas 12a to 12g where the tracer concentration measured by the light scattering airborne particle counter 16a or the PM2.5 automatic measuring device 16b is decreasing at a gentle gradient. It determines that air stagnation is medium in areas 12a to 12g where the tracer concentration measured by the light scattering airborne particle counter 16a or the PM2.5 automatic measuring device 16b is decreasing at the average gradient of all decays in areas 12a to 12g from the start of measurement.

[0079] The air stagnation improvement system 10 and the air stagnation improvement method compare the air stagnation state of each area 12a to 12g, which is determined from the decay status of tracer concentrations over time (concentration decay status of each gradient) measured by the light scattering type air particle counter 16a or the PM2.5 automatic measuring device 16b (tracer concentration measuring device 16), and relatively determine the magnitude of the air stagnation state in each area 12a to 12g. Therefore, by comparing the air stagnation state of each area 12a to 12g, the magnitude of the air stagnation state in each area 12a to 12g can be accurately determined.

[0080] The output means (output process) executed by the controller outputs the air stagnation state of each area 12a to 12g in the space determined by the stagnation determination means to the display 33. The output means outputs the air stagnation state of each area 12a to 12g of the room 11 before adjustment by the adjustment mechanism 14, determined by the stagnation determination means, to the display 33. After adjusting at least one of the airflow ratio and airflow direction at each air outlet of the airflow (air) generated in each area 12a to 12g of the room 11 by the adjustment mechanism 14, the output means outputs the air stagnation state of each area 12a to 12g of the room 11 after adjustment by the adjustment mechanism 14, determined by the stagnation determination means, to the display 33.

[0081] The air stagnation improvement system 10 and the air stagnation improvement method output to the display 33 the air stagnation state before adjusting at least one of the airflow ratio and airflow direction at each air outlet for the airflow generated in each area 12a to 12g within the room 11. This allows users to check the air stagnation state in each area 12a to 12g within the room 11 before adjusting the airflow ratio and airflow direction, and to know which areas 12a to 12g are experiencing air stagnation. The air stagnation improvement system 10 and the air stagnation improvement method output to the display 33 the air stagnation state after adjusting at least one of the airflow ratio and airflow direction at each air outlet for the airflow generated in each area 12a to 12g within the room 11. This allows users to check the air stagnation state in each area 12a to 12g after improving the air stagnation, and to know whether the air stagnation has been improved in each area 12a to 12g.

[0082] Figure 3 is a diagram illustrating the air conditioning and ventilation operation in the air stagnation improvement system 10 (air stagnation improvement method), and Figure 4 is a diagram illustrating the particulate matter generation operation in the air stagnation improvement system 10 (air stagnation improvement method). Figure 5 is a diagram showing an example of the state of air stagnation generated in predetermined areas 12a to 12g within the room 11, as output (displayed) on the display 33, and Figure 6 is a flowchart illustrating each process carried out by the air stagnation improvement method.

[0083] The controller's startup screen (not shown) displayed on the display 33 shows an icon indicating the air stagnation improvement system 10. Clicking (tapping) this icon launches an application to perform air stagnation improvement operation, and the condition setting screen (not shown) for the air stagnation improvement system 10 is displayed on the display 33. The condition setting screen displays buttons for starting air stagnation improvement, creating a room sample image, entering numerical values, and canceling.

[0084] After clicking the "Create Room Sample Image" button, the user uses a keyboard, touch panel, or mouse to create various room sample images with arbitrary layouts by freely arranging Room 11, which simulates an actual room 11. After creating the room sample images, a tracer generation / measurement point setting screen (not shown) is output to the display 33. On the tracer generation / measurement point setting screen, the user selects a specific room sample image from the various room sample images, and then uses a keyboard, touch panel, or mouse to drag and drop an ultrasonic humidifier 15 or other humidifier (tracer particle generation point) and a light scattering type airborne particle counter 16a (tracer particle measurement point) or PM2.5 automatic measuring device 16b (tracer particle measurement point) to any area of ​​the room sample image.

[0085] The positions of the ultrasonic humidifiers 15 or other humidifiers attached to the sample room image of Room 11 shown in Figure 1 correspond to the positions of the ultrasonic humidifiers 15 or other humidifiers actually installed in Room 11, and the positions of the light-scattering airborne particle counters 16a or PM2.5 automatic measuring devices 16b attached to the sample room image of Room 11 correspond to the positions of the light-scattering airborne particle counters 16a or PM2.5 automatic measuring devices 16b actually installed in Room 11.

[0086] After attaching the integrated ultrasonic humidifier 15 or other humidifier and the light-scattering airborne particle counter 16a or PM2.5 automatic measuring device 16b to each area 12a to 12g, the airflow ratio at each air outlet in the room 11 is entered into each numerical input area, the number of ultrasonic humidifiers 15 or other humidifiers and light-scattering airborne particle counters 16a or PM2.5 automatic measuring devices 16b installed is entered, the amount of liquid required to generate fine particles 34 in the ultrasonic humidifier 15 or other humidifier is entered, and the volume of the room 11 is entered. Furthermore, fine particles 34 are generated from a predetermined amount of liquid in the ultrasonic humidifier 15 or other humidifier so that the gradient of concentration decay of fine particles 34 in each area 12a to 12g can be measured by the light-scattering airborne particle counter 16a or PM2.5 measuring device 16b.

[0087] Next, the operating time of the ultrasonic humidifier 15 or other humidifier (the time it takes for fine particles 34 to be generated) is entered. The controller stores the entered airflow ratio at each air outlet, the number of ultrasonic humidifiers 15 or other humidifiers and light-scattering airborne particle counters 16a or PM2.5 automatic measuring devices 16b installed, the amount of liquid required to generate fine particles 34 in the ultrasonic humidifier 15 or other humidifier, the volume of the room 11, and the operating time of the ultrasonic humidifier 15 or other humidifier (the time it takes for fine particles 34 to be generated by the ultrasonic humidifier 15 or other humidifier) ​​in a large-capacity storage area (hard disk) in association with the input date and time, room specific identification number, area specific identification number, humidifier identification number, and measuring instrument identification number.

[0088] After entering data into each numerical input area, click the "Start Air Stagnation Improvement" button displayed on the display 33. Clicking the "Start Air Stagnation Improvement" button starts the air conditioning and ventilation operation of the controller. The controller sends an ON signal to the control unit of each supply air damper 21, an ON signal to the control unit of the servo motor of each louver 30, an ON signal to the control unit of each exhaust / return air damper 26, and an ON signal to the control unit of the air conditioner 19. Furthermore, it sends an ON signal to the control unit of the outside air fan 31 of the outside air duct 23 and an ON signal to the control unit of the exhaust fan 32 of the exhaust duct 24.

[0089] When the control unit of each air supply damper 21 receives an ON signal, it activates the air supply damper 21 (motor damper). When the air supply damper 21 is activated, its opening is maintained at the initial setting, and the airflow rate of the air passing through the air supply duct 20 is kept constant. When the control unit of the servo motor of each louver 30 receives an ON signal, it activates the servo motor. When the servo motor is activated, it rotates by the set angle, maintaining the angle of each louver 30 at the initial setting, and keeping the airflow direction (outlet air direction) of the air supplied from each air supply port 22 to each area 12a to 12g in the room 11 constant.

[0090] The control unit of each exhaust / return damper 26 that receives an ON signal activates those exhaust / return dampers 26 (motor dampers). When the exhaust / return dampers 26 are activated, their opening is maintained at the initial setting, and the airflow rate of the air passing through the exhaust / return ducts 25b is kept constant. The control unit of the air conditioner 19 that receives an ON signal activates the supply fan 28, the control unit of the outside fan 31 that receives an ON signal activates the outside fan 31, and the control unit of the exhaust fan 32 that receives an ON signal activates the exhaust fan 32.

[0091] When the supply fan 28 of the air conditioner 19, the outside fan 31 of the outside air duct 23, and the exhaust fan 32 of the exhaust duct 24 are activated, as shown by the arrows in Figure 3, air from each area 12a to 12g in the room 11 flows into the exhaust / return ducts 25b from each exhaust / return air port 27, then enters the exhaust / return air dampers 26 installed in the exhaust / return air ducts 25b, and a predetermined amount of air from each area 12a to 12g in the room 11, having passed through the damper openings of the exhaust / return air dampers 26, flows from the exhaust / return air ducts 25b into the return duct 25a and the exhaust duct 24.

[0092] A portion of the air in each area 12a to 12g within room 11 is exhausted outside room 11 through an exhaust port connected to one end of the exhaust duct 24, and the remaining air flows from the return air duct 25a towards the air conditioner 19 and into the air conditioner 19. Outside air flows into the outside air duct 23 from the outside air intake, and the outside air flows through the outside air duct 23 towards the air conditioner 19 and into the air conditioner 19.

[0093] The air from inside the room 11 that flows into the air conditioner 19 and the outside air pass through the filter 29, removing impurities such as dust and various bacteria contained in the air and outside air, and the air from which impurities have been removed flows from the air conditioner 19 into the supply air duct 20. After the air from which impurities have been removed flows into each supply air duct 20, it enters the supply air dampers 21 installed in those supply air ducts 20, and a predetermined volume of air that has passed through the damper openings of the supply air dampers 21 is supplied from each supply air inlet 22 to each area 12a to 12g inside the room 11 in a predetermined direction. Inside the room 11, an airflow is generated by the air conditioning and ventilation mechanism 13 that flows from each supply air inlet 22 towards each exhaust and return air inlet 27 (air conditioning and ventilation process) (S-1).

[0094] Furthermore, depending on the volume of Room 11, the layout of Room 11, the arrangement within Room 11 (the positions of chairs, desks, various electronic devices, bookshelves, partitions, etc. placed within Room 11), the operating conditions of the heating and cooling system, and the movement of people within Room 11, areas among areas 12a to 12g where air stagnates may occur, resulting in stagnant air. In areas where stagnant air occurs, air exchange is slow, fresh air does not circulate, and polluted air containing dust and bacteria remains.

[0095] Next, the controller sends an ON signal to the control unit of the ultrasonic humidifier 15 or other humidifier (the ultrasonic humidifier 15 or other humidifier installed in the actual room 11). Meanwhile, the supply fan 28 of the air conditioner 19, the outside fan 31 of the outside air duct 23, and the exhaust fan 32 of the exhaust duct 24 continue to operate, generating airflow within the room 11.

[0096] Upon receiving an ON signal, the control units of the ultrasonic humidifiers 15 or other humidifiers activate the ultrasonic humidifiers 15 or other humidifiers. During the particle generation operation, the ultrasonic transducers of each ultrasonic humidifier 15 or other humidifier generate ultrasonic waves (vibrations), and these vibrations cause minute particles 34 containing tracer particles to be continuously released from the ultrasonic humidifiers 15 or other humidifiers. The minute particles 34 containing tracer particles gradually diffuse into the air in the room 11 (particle generation process) (S-2). In the particle generation process, the air conditioning and ventilation process generates airflow in the room 11 (space) and diffuses the minute particles 34 containing tracer particles into the room 11. In the particle generation process, minute particles 34 containing tracer particles diffuse into the room 11 from multiple ultrasonic humidifiers 15 or other humidifiers (tracer generation points) located in areas 12a to 12g of the room 11 that are spaced a predetermined distance apart. In the ultrasonic humidifier 15 or another humidifier, tracer particles are generated so that the tracer concentration rises to a level where the concentration decay can be sufficiently measured in a nearby light-scattering airborne particle counter 16a or PM2.5 measuring instrument 16b. The generation point and measurement point are positioned so that the concentration decay at each measurement point does not interfere with each other when measuring the decay after the generation of tracer particles has stopped.

[0097] The amount of liquid used to generate fine particles 34, including tracer particles, in the particle generation process is adjusted so that the gradient of the concentration decay of fine particles 34 in each area 12a to 12g can be measured with a light scattering type airborne particle counter 16a or a PM2.5 measuring instrument 16b.

[0098] The controller operates the ultrasonic humidifier 15 or another humidifier for a preset operating time during the particulate matter generation process, diffusing fine particles 34 containing tracer particles into each area 12a to 12g of the room. As the ultrasonic humidifier 15 or other humidifier operates for the set operating time, the concentration of tracer particles (tracers) in each area 12a to 12g of the room 11 reaches a predetermined concentration (a concentration at which air stagnation can be determined in each area 12a to 12g of the room 11 during the stagnation determination process).

[0099] The air stagnation improvement system 10 and the air stagnation improvement method are designed so that the gradient of the concentration decay of fine particles 34 in each area 12a to 12g can be measured with a light scattering type airborne particle counter 16a or a PM2.5 measuring instrument 16b. Since the fine particles 34 generated from a predetermined amount of liquid are produced from an ultrasonic humidifier 15 or other humidifier, it is not necessary to temporarily stop the air conditioning and ventilation operation of the room 11 when measuring the tracer concentration.

[0100] The air stagnation improvement system 10 and the air stagnation improvement method generate fine particles 34 containing tracer particles (tracers) in the room 11 (space) from an ultrasonic humidifier 15 or another humidifier in areas 12a to 12g that are spaced a predetermined distance apart and do not interfere with each other. This allows tracer particles to be quickly generated in each area 12a to 12g, and while performing air conditioning and ventilation operation, the concentration of tracer particles in the room 11 can be adjusted to a concentration that allows for the determination of air stagnation in each area 12a to 12g within the room 11 during the stagnation determination process.

[0101] The air stagnation improvement system 10 and the air stagnation improvement method generate minute particles 34 containing tracer particles by vibration energy from the ultrasonic waves of an ultrasonic humidifier 15 or other humidifier. Therefore, the stagnation state of the air in a room 11 (space) can be measured using tracer particles at room temperature without using a special heat source. This allows for easy measurement of the air stagnation state in a room 11 (space) without worrying about temperature rise, not only in a room 11 (space) where no people are present, but also in a room 11 (space) where people are present.

[0102] After the operating time (time for generating fine particles 34) of the ultrasonic humidifier 15 or other humidifier has elapsed, the controller sends a stop signal to the control unit of the ultrasonic humidifier 15 or other humidifier, and also sends a measurement signal (ON signal) to the control unit of the light scattering type airborne particle counter 16a (a light scattering type airborne particle counter 16a installed in the actual room 11) or the control unit of the PM2.5 automatic measuring device 16b (a PM2.5 automatic measuring device 16b installed in the actual room 11).

[0103] Upon receiving a stop signal, the control unit of the ultrasonic humidifier 15 or other humidifier stops the ultrasonic humidifier 15 or other humidifier.

[0104] Furthermore, the supply fan 28 of the air conditioner 19, the outside fan 31 of the outside air duct 23, and the exhaust fan 32 of the exhaust duct 24 remain running. Air from room 11 flows into these exhaust / return ducts 25b, and from the exhaust / return ducts 25b, it flows into the return duct 25a and the exhaust duct 24. A portion of the air from room 11 that flows into the exhaust duct 24 is exhausted outside room 11 through the exhaust port, and the remaining air flows into the air conditioner 19 from the return duct 25a. Outside air flows into the outside air duct 23, and from the outside air duct 23, it flows into the air conditioner 19. Air from which impurities have been removed flows from the air conditioner 19 into the supply duct 20, and a predetermined volume of air is supplied to each area 12a to 12c in room 11 from each supply port 22 with a predetermined airflow direction.

[0105] The control unit of the light-scattering airborne particle counter 16a or the control unit of the PM2.5 automatic measuring device 16b that receives the measurement signal activates the light-scattering airborne particle counter 16a or the PM2.5 automatic measuring device 16b. The light-scattering airborne particle counter 16a starts measuring the number of tracer particles (numerical data) (tracer concentration) diffused into the room 11 immediately after the ultrasonic humidifier 15 or other humidifier (particle generation process) stops. Alternatively, the PM2.5 automatic measuring device 16b starts measuring the weight concentration data (numerical data) (tracer concentration) of tracer particles diffused into the room 11 immediately after the ultrasonic humidifier 15 or other humidifier (particle generation process) stops (tracer concentration measurement process) (S-3).

[0106] The control unit of the light-scattering airborne particle counter 16a transmits data (numerical data) of the number of tracer particles in each area 12a to 12g within the room 11, measured by the light-scattering airborne particle counter 16a, to the controller at predetermined time intervals or continuously in a time series. The control unit of the PM2.5 automatic measuring device 12b transmits data (numerical data) of the weight concentration of tracer particles in each area 12a to 12g within the room 11, measured by the PM2.5 automatic measuring device 12b, to the controller at predetermined time intervals or continuously in a time series.

[0107] As the supply fan 28 of the air conditioner 19, the outside fan 31 of the outside air duct 23, and the exhaust fan 32 of the exhaust duct 24 continue to operate, a portion of the air in the room 11 is exhausted outside the room 11 through the exhaust port, the remaining air flows into the air conditioner 19, and outside air flows into the air conditioner 19 from the outside air duct 23. Air at a predetermined airflow ratio is supplied to each area 12a to 12c in the room 11 from each supply port 22 at a predetermined airflow direction, and tracer particles are captured by the filter 29 of the air conditioner 19. As shown in Figure 2, the concentration of tracer particles in each area 12a to 12c in the room 11 gradually decreases. Therefore, the number of tracer particles measured by the light scattering airborne particle counter 16a is "particles / m³". 3 The value of "μg / m³" gradually decreases over time, or the measured concentration data of tracer particles measured by the PM2.5 automatic measuring device 16b is "μg / m³". 3 The amount of "" gradually decreases over time.

[0108] The controller measures the time intervals (each interval in the decay process of the tracer particle count data) for each area 12a to 12g within the chamber 11, transmitted from the control unit of the light scattering type airborne particle counter 16a, from the initial measurement count data to 0 (the tracer particle count data becomes the same as that of the outside air (background) from the initial measurement count data), and plots each tracer particle count data and the time intervals associated with the decay of those measurement count data in the graph shown in Figure 2.

[0109] The controller stores in the hard disk, associated with the room identification number, area identification number, measuring instrument identification number, and measurement date and time, each time from the start of measurement to the point when the number of tracer particles in each area 12a to 12g becomes 0. When the number of tracer particles in each area 12a to 12g within room 11 becomes 0, the controller sends a stop signal to the control units of those light-scattering airborne particle counters 16a. Upon receiving the stop signal, the control units of those light-scattering airborne particle counters 16a stop the operation (measurement) of each light-scattering airborne particle counter 16a.

[0110] Furthermore, the controller measures the time intervals (each interval in the decay process of the measured particle count data) for each area 12a to 12g within the room 11, transmitted from the control unit of the PM2.5 automatic measuring device 16b, from the measured concentration data at the start of measurement until it becomes 0 (the measured concentration data of tracer particles becomes the same as that of the outside air (background) from the measured concentration data at the start of measurement), and plots each measured concentration data of tracer particles and the time intervals associated with the decay of those measured concentration data on the graph shown in Figure 2.

[0111] The controller stores in the hard disk, associated with the room identification number, area identification number, measuring instrument identification number, and measurement date and time, each time from the start of measurement to the point when the tracer particle concentration data for each area 12a to 12g becomes 0. When the tracer particle concentration data for each area 12a to 12g in room 11 becomes 0, the controller sends a stop signal to the control unit of those PM2.5 automatic measuring devices 16b. Upon receiving the stop signal, the control unit of those PM2.5 automatic measuring devices 16b stops the startup (measurement) of each PM2.5 automatic measuring device 16.

[0112] As previously described, the airflow state in each area 12a to 12g within room 11 differs depending on the environment and operating conditions of room 11, resulting in varying degrees of air stagnation in each area 12a to 12g. Therefore, as shown in Figure 2, the time it takes for the measured concentration data or measured number data of tracer particles to become zero from the measured concentration data or measured number data at the start of measurement differs for each area 12a to 12g.

[0113] Here, in areas 12a to 12g where the measured concentration data or the number of tracer particles decreases at a gentle gradient from the start of measurement, the air exchange due to the flow of supply air into areas 12a to 12g is slow, and the air stagnation in those areas is large. Conversely, in areas 12a to 12g where the measured concentration data or the number of tracer particles decreases at a steep gradient from the start of measurement, the air exchange due to the flow of supply air into areas 12a to 12g is fast, and the air stagnation in those areas is small.

[0114] The controller determines that air stagnation is high in areas 12a to 12g where the measured concentration data of tracer particles (tracer concentration) or the measured number data of tracer particles (tracer concentration) is decreasing at a gentle gradient from the start of measurement, and determines that air stagnation is low in areas 12a to 12g where the measured concentration data or the measured number data of tracer particles is decreasing at a steep gradient from the start of measurement, and determines that air stagnation is medium in areas 12a to 12g where the measured concentration data or the measured number data of tracer particles is decreasing at the average gradient of all the decays in areas 12a to 12g from the start of measurement (stagnation determination means (stagnation determination process)) (S-4).

[0115] In the stagnation determination means (stagnation determination step), the controller compares the stagnation state of the air in each area 12a to 12g, determined from the decay status over time of the number of tracer particles measured (tracer concentration) or the measured concentration data of tracer particles (tracer concentration) measured by the light scattering type airborne particle counter 16a or the PM2.5 automatic measuring device 16b (concentration decay status of each gradient), and determines the magnitude of the stagnation state of the air in each area 12a to 12g.

[0116] As a specific example, in the stagnation determination means (stagnation determination process), the controller sets the air stagnation state in area 12a to 12g, where the measured concentration data of tracer particles (tracer concentration) or the measured number data of tracer particles (tracer concentration) decays at the gentlest rate from the start of measurement, to the maximum, the air stagnation state in area 12a to 12g, where the measured concentration data of tracer particles or the measured number data decays at the steepest rate from the start of measurement, to the minimum, and sets the curve of the average gradient of all decays in area 12a to 12g to be the medium (average) air stagnation state.

[0117] The controller determines that the air stagnation state in areas 12a to 12g, where the curve attenuation is gentler than that of the medium (average) air stagnation state, is high (bad), and that the air stagnation state in areas 12a to 12g, where the curve attenuation is steeper than that of the medium (average) air stagnation state, is low (good). The controller stores the degree of stagnation (high, medium, low) for each area 12a to 12g determined by the stagnation determination means (stagnation determination process) (S-4) in the hard disk, associating it with the room identification number, area identification number, and determination date and time (measurement date and time).

[0118] The controller outputs (displays) the state of air stagnation in each area 12a to 12g within the chamber 11, as determined by the stagnation determination means (stagnation determination process), to the display 33 (output means (output process)) (S-5). As shown in Figure 5, the display 33 shows the state of air stagnation in each area 12a to 12g within the chamber 11 using shades of color. The area with the darkest color (areas 12a to 12g) has a high level of air stagnation, the area with the second darkest color (areas 12a to 12g) has a medium level of air stagnation, and the area with the lightest color (areas 12a to 12g) has a low level of air stagnation.

[0119] Figure 7 shows an example of the adjustment process by the adjustment mechanism 14, and Figure 8 shows another example of the air stagnation state in areas 12a to 12g within the chamber 11 as output (displayed) on the display 33. The controller performs an adjustment of the airflow rate ratio at multiple air outlets in the air supply mechanism (multiple air outlet airflow rate ratio adjustment process) in area 12a where the air stagnation state is determined to be high and in area 12b where the air stagnation state is determined to be low by the stagnation determination means (stagnation determination process).

[0120] In the adjustment of the airflow ratio at multiple air outlets (the process of adjusting the airflow ratio at multiple air outlets), the controller transmits an opening expansion signal (an opening larger than the opening for normal air conditioning / ventilation operation or the maximum opening) to the control unit of the supply air damper 21 that supplies air to area 12a where the air stagnation state is determined to be high. Upon receiving the opening expansion signal, the control unit of the supply air damper 21 expands the opening of the supply air damper 21, thereby increasing the airflow ratio of the air flowing through the supply air duct 20 (adjustment means (adjustment process)) (S-6).

[0121] In area 12a, where the air stagnation state is determined to be high, a larger volume of air (higher volume ratio) is supplied compared to the other areas 12b and 12c, as shown in Figure 7. By increasing the volume (volume ratio) of air supplied to area 12a, a large amount of air is sent to areas 12a and 12b where the air stagnation state is determined to be high, and the airflow created by the air supplied at a predetermined volume (volume ratio) resolves the air stagnation in area 12a. The adjustment means (adjustment process) by the adjustment mechanism 14 changes the air stagnation state from high to low or medium, improving the air stagnation state in area 12a.

[0122] Furthermore, since the total airflow volume supplied to room 11 is the same before and after adjustment by the adjustment mechanism 14, the area 12b, which is determined to have a small amount of stagnant air, is supplied with less airflow (smaller airflow ratio) than the other areas 12a and 12c, as shown in Figure 7. In the adjustment of the discharge airflow ratio in multiple air outlets (the process of adjusting the discharge airflow ratio in multiple air outlets), the controller transmits an opening reduction signal (an opening smaller than the opening for normal air conditioning and ventilation operation or a minimum opening) to the control unit of the supply air damper 21 that supplies air to area 12b, which is determined to have a small amount of stagnant air. Upon receiving the opening reduction signal, the control unit of the supply air damper 21 reduces the opening of the supply air damper 21, thereby reducing the airflow volume of air passing through the supply air duct 20 (adjustment means (adjustment process)) (S-6).

[0123] The controller adjusts the airflow ratio of the multiple air outlets in area 12a where the air stagnation is high, and adjusts the airflow ratio of the multiple air outlets in area 12b where the air stagnation is low, by adjusting the airflow ratio of the multiple air outlets in area 12a to 12g (a process for adjusting the airflow ratio of the multiple air outlets). Then, the controller continues to generate airflow in each area 12a to 12g of room 11 using the air conditioning and ventilation mechanism, generates fine particles 34 including tracer particles in each area 12a to 12g of room 11 using the ultrasonic humidifier 15 or other humidifier (particle generator 15), measures the tracer concentration in each area 12a to 12g of room 11 using the light scattering type airborne particle counter 16a or the PM2.5 automatic measuring device 16b (tracer concentration measuring device 16), and repeats the procedure of determining the air stagnation state in each area 12a to 12g of room 11 using the stagnation determination means.

[0124] The air stagnation improvement system 10 and the air stagnation improvement method work as follows: A filter 29 installed in the air conditioner 19 (circulation path) collects tracer particles, so the filter 29 can reduce the tracer concentration in each area 12a to 12g within the room 11 to 0. Fine particles 34 for diffusing the tracer particles are then generated again in each area 12a to 12g within the room 11 from the ultrasonic humidifier 15 or other humidifier (fine particle generator 15), and while measuring the tracer concentration in each area 12a to 12g, the air stagnation state in each area 12a to 12g within the room 11 can be re-determined from the decay status of the measured tracer concentration over time (the concentration decay status of each gradient), making it possible to determine the air stagnation state multiple times in a time series.

[0125] The controller repeats the air conditioning / ventilation generation process, particulate matter generation process, tracer concentration measurement process, and stagnation determination means (stagnation determination process), and then outputs (displays) the state of air stagnation in each area 12a to 12g within the room 11 determined by the stagnation determination means (stagnation determination process) (the state of air stagnation after adjustment by the adjustment mechanism 14 (adjustment of the ratio of discharged air volume in multiple air outlets (adjustment of the ratio of discharged air volume in multiple air outlets)) to the display 33 (output means (output process)) (S-5). As shown in Figure 8, the display 33 outputs an image representing the state of air stagnation in each area 12a to 12g within the room 11 using shades of color. In Figure 8, the shades are light and uniform, indicating that the state of air stagnation in each area 12a to 12g within the room 11 is good (uniform).

[0126] The air stagnation improvement system 10 and the air stagnation improvement method perform an adjustment of the discharge air volume ratio at multiple air outlets (a process for adjusting the discharge air volume ratio at multiple air outlets) in an area 12a in the room 11 where the air stagnation is high, thereby increasing the air volume (air volume ratio) supplied to that area 12a. The airflow created by the large amount of supplied air can eliminate the stagnation of air in that area 12a, and thus improve the air stagnation in that area 12a.

[0127] Figure 9 shows another example of the adjustment process by the adjustment mechanism 14. The controller performs adjustments to the airflow rate ratio at multiple air outlets in the air supply mechanism 17 (adjustment of airflow rate ratio at multiple air outlets) and the airflow direction at the air supply mechanism 17 (adjustment of airflow direction) in areas 12a where the stagnation determination means (stagnation determination process) determines that the air stagnation state is high and in areas 12b where the stagnation state is low.

[0128] In adjusting the airflow ratio in multiple air outlets (multiple air outlet airflow ratio adjustment process) and adjusting the airflow direction (airflow direction adjustment process), the controller transmits an opening expansion signal (a larger opening than the opening for normal airflow operation or the maximum opening) to the control unit of the supply air damper 21 that supplies air to area 12a where the air stagnation state is determined to be high, and transmits an angle change signal to the control unit of the servo motor of the louver 30 installed at the supply air outlet 22 in area 12a where the air stagnation state is determined to be high. Furthermore, the controller transmits an opening reduction signal (a smaller opening than the opening for normal airflow operation or the minimum opening) to the control unit of the supply air damper 21 that supplies air to area 12b where the air stagnation state is determined to be low, and transmits an angle change signal to the control unit of the servo motor of the louver 30 installed at the supply air outlet 22 in area 12b where the air stagnation state is determined to be low.

[0129] Upon receiving the opening expansion signal, the control unit of the air supply damper 21 expands the opening of the air supply damper 21, increasing the airflow ratio of the air passing through the air supply duct 23 (adjustment step) (S-6). Upon receiving the angle change signal, the control unit of the servo motor rotates the servo motor to change the angle of the louver 30, thereby changing the airflow direction (outlet airflow direction) of the air supplied from the air intake port 22 (adjustment step) (S-6).

[0130] Upon receiving the opening reduction signal, the control unit of the air supply damper 21 reduces the opening of the air supply damper 21, thereby decreasing the airflow ratio of the air passing through the air supply duct 23 (adjustment step) (S-6). Upon receiving the angle change signal, the control unit of the servo motor rotates the servo motor to change the angle of the louver 30, thereby changing the airflow direction (outlet airflow direction) of the air supplied from the air intake port 22 (adjustment step) (S-6).

[0131] In area 12a, where the air stagnation state is determined to be high, a larger volume of air is supplied than in the other areas 12b and 12c, as shown in Figure 9, and the direction of the supplied air is changed. By increasing the volume of air supplied to area 12a and changing the direction of the air, a large amount of air is sent to area 12a, where the air stagnation state is determined to be high, at a predetermined direction, and the airflow created by the air supplied at a predetermined volume and angle resolves the air stagnation in that area 12a. In the adjustment process by the adjustment mechanism 14, the air stagnation state is changed from high to low or medium, improving the air stagnation state in that area 12a. In area 12b, where the air stagnation state is determined to be low, a smaller volume of air (smaller volume ratio) is supplied than in the other areas 12a and 12c, as shown in Figure 9, and the direction of the supplied air is changed.

[0132] The airflow ratio (supply airflow) in areas 12a and 12b, where the air stagnation is high and low, is adjusted by adjusting the airflow ratio ratio in multiple air outlets (airflow ratio ratio adjustment process in multiple air outlets), and the airflow direction in areas 12a and 12b, where the air stagnation is high and low, is adjusted by adjusting the airflow direction (airflow direction adjustment process). After that, the controller continues to generate airflow in each area 12a to 12g within the room 11 using the air conditioning / ventilation generation mechanism 13, and the ultrasonic humidifiers 15 or The procedure is repeated in which a humidifier (particulate generator 15) generates fine particles 34, including tracer particles, in each area 12a to 12g within the room 11, and the tracer concentration in each area 12a to 12g within the room 11 is measured using a light scattering type airborne particle counter 16a or a PM2.5 automatic measuring device 16b (tracer concentration measuring device 16), and the stagnation state of the air in each area 12a to 12g within the room 11 is determined using a stagnation determination means.

[0133] The controller repeats the air conditioning / ventilation generation process, particulate matter generation process, tracer concentration measurement process, and stagnation determination means (stagnation determination process), and then outputs (displays) the state of air stagnation in each area 12a to 12g within the room 11 determined by the stagnation determination means (stagnation determination process) (the state of air stagnation after adjustment by the adjustment mechanism 14 (adjustment of the ratio of discharged air volume in multiple air outlets (adjustment process of the ratio of discharged air volume in multiple air outlets) and adjustment of the direction of discharged air (adjustment process of the direction of discharged air)) to the display 33 (output means (output process)) (S-5). The display 33 shows a light and uniform shading indicating the state of air stagnation in each area 12a to 12g within the room 11, indicating that the state of air stagnation in each area 12a to 12g within the room 11 is good (see Figure 8).

[0134] The air stagnation improvement system 10 and the air stagnation improvement method perform adjustment of the discharge air volume ratio at multiple air outlets (discharge air volume ratio adjustment process at multiple air outlets) and the discharge air direction (discharge air direction adjustment process) at multiple air outlets in area 12a where the air stagnation in the room 11 is high, thereby increasing the air volume supplied to area 12a and changing the air direction of the air supplied to area 12a. The airflow created by the air supplied at a predetermined air volume and angle can eliminate the stagnation in area 12a, thereby improving the air stagnation in area 12a.

[0135] In addition, in areas 12a and 12b where the stagnation determination means (stagnation determination process) determines that the air stagnation is high, only the air outlet direction adjustment (air outlet direction adjustment process) in the air supply mechanism 17 may be performed. In this case, the controller sends an angle change signal to the control unit of the servo motor of the louver 30 installed at the air supply port 22 in areas 12a and 12b where the air stagnation is high. The control unit of the servo motor that receives the angle change signal rotates the servo motor to change the angle of the louver 30 and changes the air outlet direction (air blowing direction) of the air supplied from the air supply port 22 (adjustment process) (S-6).

[0136] Figure 10 shows another example of the adjustment process by the adjustment mechanism 14. The controller performs the following adjustments in areas 12a and 12d where the stagnation state of the air is determined to be high by the stagnation determination means (stagnation determination process), and areas 12b and 12e where the stagnation state of the air is determined to be low: adjustment of the airflow rate ratio of the multiple air outlets in the air supply mechanism 17 (multiple air outlet airflow rate ratio adjustment process), adjustment of the airflow direction of the air supply mechanism 17 (airflow direction adjustment process), and adjustment of the airflow rate ratio of the multiple air outlets in the exhaust / return air mechanism 18 (multiple air outlet airflow rate ratio adjustment process).

[0137] In adjusting the discharge airflow ratio in multiple air outlets (discharge airflow ratio adjustment process in multiple air outlets) and the discharge airflow direction (discharge airflow direction adjustment process), as well as adjusting the intake airflow ratio in multiple air outlets (intake airflow ratio adjustment process in multiple air outlets), the controller transmits an opening expansion signal (an opening larger than the opening for normal airflow operation or the maximum opening) to the control unit of the supply air damper 21 that supplies air to area 12a where the air stagnation state is determined to be high, transmits an angle change signal to the control unit of the servo motor of the louver 30 installed at the supply air outlet 22 in area 12 where the air stagnation state is determined to be high, and transmits an opening expansion signal (an opening larger than the opening for normal airflow operation or the maximum opening) to the control unit of the exhaust / return air damper 26 that exhausts air from area 12d where the air stagnation state is determined to be high.

[0138] Furthermore, the controller transmits an opening reduction signal (a smaller opening than the normal airflow operation opening or the minimum opening) to the control unit of the supply air damper 21 that supplies air to area 12b where the air stagnation state is determined to be small, and also transmits an opening reduction signal (a smaller opening than the normal airflow operation opening or the minimum opening) to the control unit of the exhaust / return air damper 26 that exhausts air from area 12e where the air stagnation state is determined to be large.

[0139] Upon receiving the opening expansion signal, the control unit of the air supply damper 21 expands the opening of the air supply damper 21, increasing the airflow ratio of the air passing through the air supply duct 20 (adjustment step) (S-6). Upon receiving the angle change signal, the control unit of the servo motor rotates the servo motor to change the angle of the louver 30, thereby changing the airflow direction (outlet airflow direction) of the air supplied from the air intake port 22 (adjustment step) (S-6).

[0140] Upon receiving the opening reduction signal, the control unit of the air supply damper 21 reduces the opening of the air supply damper 21, thereby decreasing the airflow ratio of the air passing through the air supply duct 20 (adjustment step) (S-6). Upon receiving the angle change signal, the control unit of the servo motor rotates the servo motor to change the angle of the louver 30, thereby changing the airflow direction (outlet airflow direction) of the air supplied from the air supply port 22 (adjustment step) (S-6).

[0141] Upon receiving an opening degree expansion signal, the control unit of the exhaust / return damper 26 expands the opening degree of the exhaust / return damper 26, increasing the airflow ratio of the air passing through the exhaust / return duct 25b (adjustment step) (S-6). Upon receiving an opening degree reduction signal, the control unit of the exhaust / return damper 26 reduces the opening degree of the exhaust / return damper 26, decreasing the airflow ratio of the air passing through the exhaust / return duct 25b (adjustment step) (S-6).

[0142] As shown in Figure 10, area 12a, where the air stagnation level is determined to be high, is supplied with a larger volume of air than areas 12b and 12c, and the direction of the supplied air changes. Area 12b, where the air stagnation level is determined to be low, is supplied with a smaller volume of air (smaller air volume ratio) than areas 12a and 12c, and the direction of the supplied air changes. Area 12d, where the air stagnation level is determined to be high, is exhausted with a larger volume of air than areas 12e and 12g, as shown in Figure 10. Area 12e, where the air stagnation level is determined to be low, is exhausted with a smaller volume of air than areas 12d and 12g.

[0143] By increasing the airflow rate supplied to area 12a and changing the direction of the airflow, a large amount of air is sent to area 12a, where the air stagnation state is determined to be high, at a predetermined direction, and the airflow created by the air supplied at a predetermined airflow rate and angle resolves the air stagnation in area 12a. In the adjustment process by the adjustment mechanism 14, the air stagnation state is changed from high to low or medium, improving the air stagnation state in area 12a. In addition, by increasing the airflow rate exhausted from area 12d, a large amount of air is exhausted from area 12d, where the air stagnation state is determined to be high, and the airflow created by the air exhausted at a predetermined airflow rate resolves the air stagnation in area 12d. In the adjustment process by the adjustment mechanism 14, the air stagnation state is changed from high to low or medium, improving the air stagnation state in area 12d.

[0144] The controller adjusts the airflow ratio (supply airflow) in areas 12a and 12b where the air stagnation is high and low by adjusting the discharge airflow ratio ratio in multiple air outlets (discharge airflow ratio adjustment process in multiple air outlets), adjusts the discharge airflow direction in areas 12a and 12b where the air stagnation is high and low by adjusting the discharge airflow direction (discharge airflow direction adjustment process), and adjusts the exhaust airflow in areas 12d and 12e where the air stagnation is high and low by adjusting the intake airflow ratio in multiple air outlets (intake airflow ratio adjustment process in multiple air outlets). After this, the controller uses the air conditioning / ventilation generation mechanism 13 to control room 1 The procedure is repeated in which airflow is continuously generated in each area 12a to 12g within 1, and minute particles 34 containing tracer particles are generated in each area 12a to 12g within room 11 by ultrasonic humidifiers 15 or other humidifiers (particle generators 15), and the tracer concentration in each area 12a to 12g within room 11 is measured by light scattering type airborne particle counters 16a or PM2.5 automatic measuring devices 16b (tracer concentration measuring devices 16), and the stagnation state of the air in each area 12a to 12g within room 11 is determined by stagnation determination means.

[0145] The controller repeats the air conditioning / ventilation generation process, particulate matter generation process, tracer concentration measurement process, and stagnation determination means (stagnation determination process), and then outputs (displays) the state of air stagnation in each area 12a to 12g within the room 11 determined by the stagnation determination means (stagnation determination process) (the state of air stagnation after adjustment by the adjustment mechanism 14 (adjustment of the discharge air volume ratio in multiple air inlets (adjustment process for the discharge air volume ratio in multiple air inlets) and adjustment of the discharge air direction (adjustment process for the discharge air direction) and adjustment of the intake air volume ratio in multiple air inlets (adjustment process for the intake air volume ratio in multiple air inlets)) to the display 33 (output means (output process)) (S-5). The display 33 shows a light and uniform shading indicating the state of air stagnation in each area 12a to 12g within the room 11, indicating that the state of air stagnation in each area 12a to 12g within the room 11 is good (see Figure 8).

[0146] The air stagnation improvement system 10 and the air stagnation improvement method perform the following in areas 12a and 12d of the room 11 where the air stagnation is high: adjusting the discharge air volume ratio (discharge air volume ratio adjustment process) and discharge air direction (discharge air direction adjustment process) at multiple air outlets, and adjusting the intake air volume ratio (intake air volume ratio adjustment process) at multiple air outlets. This increases the air volume supplied to area 12a, changes the air direction of the air supplied to area 12a, and increases the air volume exhausted from area 12d. The airflow created by the air supplied at a predetermined air volume and angle and the air exhausted at a predetermined air volume eliminates the air stagnation in areas 12a and 12d, thereby improving the air stagnation in areas 12a and 12d.

[0147] Furthermore, in areas 12a and 12d where the stagnation determination means (stagnation determination process) determines that the air stagnation state is high, only the adjustment of the discharge air direction in the supply air mechanism 17 (discharge air direction adjustment process) and the adjustment of the intake air volume ratio of the multiple air outlets in the exhaust / return air mechanism 18 (multiple air outlet intake air volume ratio adjustment process) may be performed. In this case, the controller sends an angle change signal to the control unit of the servo motor of the louver 30 installed at the air intake in area 12a where it has determined that the air stagnation is high, and sends an opening expansion signal to the control unit of the exhaust / return damper 26 which exhausts air from area 12d where it has determined that the air stagnation is high. The control unit of the servo motor that receives the angle change signal rotates the servo motor to change the angle of the louver 30, thereby changing the airflow direction (outlet airflow direction) of the air supplied from the air intake (adjustment step) (S-6). The control unit of the exhaust / return damper 26 that receives the opening expansion signal expands the opening of the exhaust / return damper 26, increasing the airflow rate of the air passing through the exhaust / return duct 25b (adjustment step) (S-6).

[0148] Furthermore, in areas 12a and 12d where the stagnation determination means (stagnation determination process) determines that the air stagnation state is high, only the adjustment of the discharge air volume ratio at multiple air outlets in the supply air mechanism 17 (adjustment process for the discharge air volume ratio at multiple air outlets) and the adjustment of the intake air volume ratio at multiple air outlets in the exhaust / return air mechanism 18 (adjustment process for the intake air volume ratio at multiple air outlets) may be performed. In this case, the controller sends an opening expansion signal to the control unit of the supply air damper 21 that supplies air to area 12a where it has determined that the air stagnation is high, and the controller sends an opening expansion signal to the control unit of the exhaust / return air damper 26 that exhausts air from area 12d where it has determined that the air stagnation is high. The control unit of the supply air damper 21 that receives the opening expansion signal expands the opening of the supply air damper 21 and increases the airflow rate of the air passing through the supply air duct 20 (adjustment step) (S-6), and the control unit of the exhaust / return air damper 26 that receives the opening expansion signal expands the opening of the exhaust / return air damper 26 and increases the airflow rate of the air passing through the exhaust / return air duct 25b (adjustment step) (S-6).

[0149] Furthermore, in areas 12d where the stagnation determination means (stagnation determination step) determines that the air stagnation state is high, only the adjustment of the intake air volume ratio of the multiple air outlets in the exhaust / return air mechanism 18 (adjustment step of intake air volume ratio of multiple air outlets) may be performed. In this case, the controller sends an opening expansion signal to the control unit of the exhaust / return air damper 26 that is exhausting air from area 12d where the air stagnation state was determined to be high. Upon receiving the opening expansion signal, the control unit of the exhaust / return air damper 26 expands the opening of the exhaust / return air damper 26 and increases the air volume of the air flowing through the exhaust / return air duct 25b (adjustment step) (S-6).

[0150] Another example of the air stagnation improvement system 10 (air stagnation improvement method) is that the controller sends an opening expansion signal to the control unit of the supply air damper 21 that supplies air to areas 12a to 12c where it has determined that the air stagnation state is high. Upon receiving the opening expansion signal, the control unit of the supply air damper 21 expands the opening of the supply air damper 21 and increases the supply airflow rate of the air flowing through the supply air duct 20 by adjusting the discharge airflow rate ratio at multiple air outlets (discharge airflow rate ratio adjustment process at multiple air outlets) (adjustment process) (S-6). After increasing the airflow rate, the controller determines the air stagnation state in each area 12a to 12g within the room 11 using the stagnation determination means.

[0151] If the stagnation determination means determines the air stagnation state in each area 12a to 12g within the chamber 11 and the air stagnation state in area 12a to 12c, which was determined to be high, has not improved, and the air stagnation state in that area 12a to 12c is still high, then if the air stagnation state in area 12a to 12c has improved, but the air stagnation state in other areas 12a to 12c is still high, then the controller sends an opening expansion signal to the control unit of the air supply damper 21 that supplies air to area 12a to 12c where the air stagnation state was determined to be high, and also sends an angle change signal to the control unit of the servo motor of the louver 30 installed in the air supply port 22 of area 12a to 12c where the air stagnation state was determined to be high.

[0152] Upon receiving the opening expansion signal, the control unit of the air supply damper 21 expands the opening of the air supply damper 21, increasing the amount of air supplied through the air supply duct 20 (adjustment step) (S-6). Upon receiving the angle change signal, the control unit of the servo motor rotates the servo motor to change the angle of the louver 30, changing the direction of the air supplied from the air supply port 22 (adjustment step) (S-6). After increasing the amount of air supplied and changing the direction of the air (direction of the air supply), the controller uses the stagnation determination means to determine the stagnation state of the air in each area 12a to 12g within the room 11.

[0153] If the stagnation determination means determines the air stagnation state in each area 12a to 12g within the chamber 11 and the air stagnation state in areas 12a to 12g has not improved, and the air stagnation state in those areas 12a to 12g is still high, then if the air stagnation state in areas 12a to 12g has improved, but the air stagnation state in other areas 12a to 12g is still high, then the controller An opening expansion signal is sent to the control unit 21 of the air supply damper that supplies air to areas 12a to 12c where the air stagnation state is determined to be high. An angle change signal is sent to the control unit of the servo motor of the louver 30 installed at the air intake port 22 in areas 12a to 12c where the air stagnation state is determined to be high. An opening expansion signal is also sent to the control unit of the exhaust / return air damper 26 that exhausts air from areas 12d to 12g where the air stagnation state is determined to be high.

[0154] Upon receiving the opening expansion signal, the control unit of the supply air damper 21 expands the opening of the supply air damper 21 and increases the supply airflow rate of the air passing through the supply air duct 20 by adjusting the airflow ratio of the discharged and supply air inlets (adjustment step) (S-6). Upon receiving the angle change signal, the control unit of the servo motor rotates the servo motor to change the angle of the louver 30 and changes the airflow direction of the air supplied from the supply air inlet 22 by adjusting the airflow direction (adjustment step) (S-6). Upon receiving the opening expansion signal, the control unit of the exhaust / return air damper 26 expands the opening of the exhaust / return air damper 26 and increases the exhaust airflow rate of the air passing through the exhaust / return air duct 25b by adjusting the airflow ratio of the multiple air inlets (adjustment step) (S-6).

[0155] In another example using the air stagnation improvement system 10 (air stagnation improvement method), the air supply mechanism 17 first adjusts the airflow ratio of the multiple air outlets (multiple air outlet airflow ratio adjustment process) in areas 12a to 12c where the air stagnation state is determined to be high. If the air stagnation state has not improved as a result of the air stagnation state being determined by the stagnation determination means in each area 12a to 12g within the room 11, in addition to adjusting the airflow ratio of the multiple air outlets (multiple air outlet airflow ratio adjustment process), the air supply mechanism 17 also adjusts the airflow direction (airflow direction adjustment process).

[0156] The airflow ratio adjustment of the discharged and supplied air in multiple air inlets (multiple air inlet airflow ratio adjustment process) and the discharge direction adjustment (discharge direction adjustment process) are performed, and the stagnation state of the air in each area 12a to 12g within the room 11 is determined by the stagnation determination means. If the stagnation state of the air has not improved, in addition to the airflow ratio adjustment of the discharged and supplied air inlets of the air inlet in the supply air mechanism 17 (multiple air inlet airflow ratio adjustment process) and the discharge direction adjustment of the air inlet in the supply air mechanism 17 (discharge direction adjustment process), the airflow ratio adjustment of the intake air inlets of the air inlet in the exhaust / return air mechanism 18 (multiple air inlet intake airflow ratio adjustment process) is performed. In this manner, the following steps are performed in stages: adjustment of the airflow ratio of the discharged and supplied air at multiple air outlets (process for adjusting the airflow ratio of the discharged and supplied air at multiple air outlets), adjustment of the airflow direction (process for adjusting the airflow direction), and adjustment of the airflow ratio of the intake air at multiple air outlets (process for adjusting the airflow ratio of the intake air at multiple air outlets).

[0157] The air stagnation improvement system 10 and air stagnation improvement method, which sequentially perform adjustment of the airflow ratio of discharged and supplied air at multiple air outlets (multiple air outlet airflow ratio adjustment process), airflow direction adjustment (airflow direction adjustment process), and airflow ratio adjustment at multiple air outlets (airflow ratio adjustment process), will, if the air stagnation condition does not improve even after adjusting the airflow ratio of discharged and supplied air at multiple air outlets (multiple air outlet airflow ratio adjustment process), will perform airflow direction adjustment (airflow direction adjustment process) in addition to adjusting the airflow ratio of discharged and supplied air at multiple air outlets (multiple air outlet airflow ratio adjustment process), and the air stagnation condition will be further improved. Even if the airflow ratio adjustment (airflow ratio adjustment process at multiple air outlets) and airflow direction adjustment (airflow direction adjustment process) are performed, if the stagnant air condition does not improve, then in addition to the airflow ratio adjustment (airflow ratio adjustment process at multiple air outlets) and airflow direction adjustment (airflow direction adjustment process) at multiple air outlets, the intake airflow ratio adjustment (intake airflow ratio adjustment process at multiple air outlets) at multiple air outlets will be adjusted. These adjustments (these processes) will ensure that the stagnation of air in areas 12a to 12g is reliably eliminated, and the stagnant air in areas 12a to 12g is reliably improved. [Explanation of Symbols]

[0158] 10. Air Stagnation Improvement System 11 rooms (space) 12a~12g area 13. Air Conditioning and Ventilation Generation Mechanism 14 Adjustment mechanism 15. Particulate matter generator 16 Tracer concentration measuring device 16a Light scattering type airborne particle counter 16b PM2.5 measuring device 17. Air supply mechanism 18 Exhaust and return air mechanism 19 Air conditioner 20 Air supply duct 21. Air intake damper 22 Air supply port 23. Outdoor air duct 24 Exhaust duct 25a Return air duct 25b Exhaust / Return Air Duct 26 Exhaust / Return Damper 27 Exhaust / Return Port 28 Intake fan 29 filters 30 Louvers (wind direction adjustment plates) 31 Outdoor fan 32 Exhaust fan 33 displays 34 Fine particles 35 Master unit 36 coils

Claims

1. In an air stagnation improvement system that improves stagnant air in a given space, The air stagnation improvement system comprises: an air conditioning and ventilation mechanism that generates airflow in the space; an adjustment mechanism that adjusts at least one of the airflow ratio and airflow direction at each air outlet of the airflow generated in the space by the air conditioning and ventilation mechanism; a plurality of particle generators installed in a predetermined area of ​​the space that generate tracer particles in the space in order to diffuse the tracer particles into the space; a plurality of tracer concentration measuring devices located near the particle generators that measure the tracer concentration in a predetermined area of ​​the space; and stagnation determination means that determines the state of air stagnation in a predetermined area of ​​the space from the decay status of the tracer concentration measured by the tracer concentration measuring devices over time. The air stagnation improvement system is characterized in that the adjustment mechanism adjusts at least one of the airflow ratio and airflow direction at each air outlet in the airflow according to the air stagnation state of each area in the space determined by the stagnation determination means, thereby improving the air stagnation in each area.

2. The air stagnation improvement system according to claim 1, wherein the air conditioning and ventilation mechanism includes a circulation path for circulating the air within the space, and a filter for collecting tracer particles is installed in the circulation path.

3. The air stagnation improvement system according to claim 1 or claim 2, wherein the particulate matter generator and the tracer concentration measuring device are integrated, and the tracer concentration measuring device integrated with the particulate matter generator measures the tracer concentration in the area where the particulate matter generator is installed.

4. The air stagnation improvement system according to claim 3, wherein the integrated predetermined particulate generator and predetermined tracer concentration measuring device are installed in a predetermined area in the space where they do not interfere with other integrated particulate generators and other tracer concentration measuring devices.

5. The air stagnation improvement system according to claim 1 or 2, wherein the stagnation determination means compares the air stagnation state of each area determined from the decay status of tracer concentrations measured by the tracer concentration measuring devices over time, determines the degree of air stagnation in each area, and the adjustment mechanism adjusts at least one of the airflow rate ratio and airflow direction at each air outlet for the areas in which the stagnation determination means has determined that the air stagnation state is high.

6. The air stagnation improvement system according to claim 5, wherein the adjustment mechanism adjusts at least one of the airflow ratio and airflow direction at each air outlet for the airflow to an area in which the stagnation determination means has determined that the air stagnation state is large, so as to reduce the air stagnation state in that area.

7. The air stagnation improvement system according to claim 1 or claim 2, wherein the air stagnation improvement system includes an output means that outputs the air stagnation state of each area in the space determined by the stagnation determination means, and the output means outputs the air stagnation state of each area in the space before adjustment by the adjustment mechanism, determined by the stagnation determination means, and after the adjustment mechanism adjusts at least one of the airflow ratio and airflow direction at each air outlet for each area of ​​the space, the air stagnation state of each area in the space after adjustment by the adjustment mechanism, determined by the stagnation determination means.

8. The air stagnation improvement system according to claim 1 or 2, wherein the procedure is repeated in which, in accordance with the air stagnation state of each area in the space determined by the stagnation determination means, at least one of the airflow ratio and airflow direction at each air outlet for the airflow to each area in the space is adjusted by the adjustment mechanism, the tracer particles are generated in the space by the particle generator, the tracer concentration is measured in each area in the space by the tracer concentration measuring device, and the air stagnation state of each area in the space is determined by the stagnation determination means.

9. The air conditioning and ventilation system according to claim 1 or claim 2, wherein the air conditioning and ventilation system comprises an air supply mechanism for supplying air into the space and an exhaust / return air mechanism for exhausting air from the space, and generates airflow in the space by supplying air into the space with the air supply mechanism and exhausting air from the space with the exhaust / return air mechanism, and the adjustment mechanism comprises at least one of the following: an outlet airflow ratio adjustment for adjusting the outlet airflow ratio of multiple air outlets in the air supply mechanism, an outlet airflow direction adjustment for adjusting the outlet airflow direction of the air supply mechanism, and an intake airflow ratio adjustment for adjusting the intake airflow ratio of multiple air outlets in the exhaust / return air mechanism, and the priority order of the outlet airflow ratio adjustment, the outlet airflow direction adjustment and the intake airflow ratio adjustment is in the order of outlet airflow ratio adjustment → outlet airflow direction adjustment → intake airflow ratio adjustment.

10. In an air stagnation improvement method for improving stagnant air in a given space, The air stagnation improvement method comprises: an air conditioning / ventilation step of generating airflow in the space; an adjustment step of adjusting at least one of the airflow ratio and airflow direction at each air outlet of the airflow generated by the air conditioning / ventilation step; a particle generation step of generating tracer particles in the space from a plurality of particle generators installed in a predetermined area of ​​the space in order to diffuse the tracer particles into the space; a tracer concentration measurement step of measuring the tracer concentration in a predetermined area of ​​the space using a plurality of tracer concentration measuring devices located near the particle generators; and a stagnation determination step of determining the state of air stagnation in a predetermined area of ​​the space from the decay status of the tracer concentration measured by the tracer concentration measurement step over time. The air stagnation improvement method is characterized in that the adjustment step adjusts at least one of the airflow ratio and airflow direction at each air outlet in the airflow according to the air stagnation state in each area of ​​the space determined by the stagnation determination step, thereby improving the air stagnation in each area.

11. The method for improving stagnant air according to claim 10, wherein the air conditioning and ventilation process circulates the air within the space using a circulation path, and a filter for capturing tracer particles is installed in the circulation path.

12. The method for improving stagnant air according to claim 10 or claim 11, wherein the particulate matter generator and the tracer concentration measuring device are integrated, and the tracer concentration measuring device integrated with the particulate matter generator measures the tracer concentration in the area where the particulate matter generator is installed.

13. The method for improving stagnant air according to claim 12, wherein the integrated predetermined particulate generator and predetermined tracer concentration measuring device are installed in a predetermined area in the space where they do not interfere with other integrated particulate generators and other tracer concentration measuring devices.

14. The method for improving air stagnation according to claim 10 or 11, wherein the stagnation determination step compares the air stagnation state of each area determined from the decay status of tracer concentrations measured by the tracer concentration measuring devices over time, and determines the magnitude of the air stagnation state in each area, and the adjustment step adjusts at least one of the airflow rate ratio and airflow direction at each air outlet for the areas where the air stagnation state is determined to be large by the stagnation determination step.

15. The method for improving air stagnation according to claim 14, wherein the adjustment step adjusts at least one of the airflow ratio and airflow direction at each air outlet for the airflow to an area in which the stagnation step determines that the air stagnation state is large, so that the air stagnation state is reduced in the area.

16. The air stagnation improvement method according to claim 10 or claim 11, wherein the air stagnation improvement method includes an output step of outputting the air stagnation state of each area in the space determined by the stagnation determination step, the output step of outputting the air stagnation state of each area in the space before adjustment by the adjustment step determined by the stagnation determination step, and after adjusting at least one of the airflow ratio and airflow direction at each air outlet for the airflow to each area in the space by the adjustment step, the air stagnation state of each area in the space after adjustment by the adjustment step determined by the stagnation determination step.

17. The air stagnation improvement method according to claim 10 or claim 11, wherein the adjustment step adjusts at least one of the airflow ratio and airflow direction at each air outlet for the airflow to each area of ​​the space according to the air stagnation state of each area of ​​the space determined by the stagnation determination step, generates the tracer particles in the space by the particle generation step, measures the tracer concentration in each area of ​​the space by the tracer concentration measurement step, and determines the air stagnation state of each area of ​​the space by the stagnation determination step, and repeats each of these steps.

18. The method for improving stagnant air according to claim 10 or claim 11, wherein the air conditioning and ventilation process generates airflow in the space by supplying air into the space and exhausting air from the space, and the adjustment process is at least one of the following: an outlet airflow ratio adjustment process that adjusts the outlet airflow ratio of the air supplied into the space at multiple air outlets; an outlet airflow direction adjustment process that adjusts the outlet airflow direction of the air supplied into the space; and an intake airflow ratio adjustment process that adjusts the intake airflow ratio of the air exhausted from the space at multiple air outlets, and the priority order of the outlet airflow ratio adjustment process, the outlet airflow direction adjustment process and the intake airflow ratio adjustment process is in the order of outlet airflow ratio adjustment process → outlet airflow direction adjustment process → intake airflow ratio adjustment process.

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