WO2023276105A1

WO2023276105A1 - Air-conditioning and ventilation system

Info

Publication number: WO2023276105A1
Application number: PCT/JP2021/024932
Authority: WO
Inventors: 翔大野口
Original assignee: 三菱電機株式会社
Priority date: 2021-07-01
Filing date: 2021-07-01
Publication date: 2023-01-05

Abstract

This air-conditioning and ventilation system (1) is equipped with: ventilation devices (60, 70) for ventilating a space (80) to be air-conditioned; a first air-conditioning device (51) for air-conditioning the space to be air-conditioned; a first sensor (41) for detecting the state of a person present in the space to be air-conditioned; and a control device (100). The control device (100) calculates the ventilation amount in the space to be air-conditioned according to the number of people present in the space to be air-conditioned (step S14, step S15), identifies the risk of infection by a virus on the basis of at least a detected value from a first sensor (41) (step S8), controls the direction or amount of airflow from the first air-conditioning device (51) according to the identified risk of infection (step S36), and controls the ventilation devices (60, 70) on the basis of the ventilation amount (step S35).

Description

air conditioning ventilation system

This disclosure relates to an air conditioning ventilation system.

It is important to properly ventilate air-conditioned spaces where people spend time. For example, Patent Literature 1 describes a ventilation system that identifies the number of people in an air-conditioned space using wearable terminals worn by people in the air-conditioned space, and appropriately controls the amount of ventilation according to the number of people. Further, Patent Document 2 describes a ventilation system that records the behavior of a person in the room with a camera and determines the amount of ventilation based on the metabolic rate of the person in the room.

Japanese Patent Application Laid-Open No. 2020-200998 JP 2020-038052 A

　Properly ventilating air-conditioned spaces is effective as a countermeasure against infectious diseases transmitted by airborne infections and droplet infections. However, conventionally, there has not been found a system that not only controls the ventilator but also controls the air conditioner in consideration of the risk of infection.

An object of the present disclosure is to provide an air-conditioning ventilation system capable of controlling not only a ventilation device but also an air-conditioning device in consideration of the risk of infection with infectious diseases.

This disclosure relates to an air conditioning ventilation system. The air-conditioning system includes a ventilation device for ventilating the air-conditioned space, a first air-conditioning device for air-conditioning the air-conditioned space, a first sensor for detecting the state of a person present in the air-conditioned space, and a control device. The control device calculates the ventilation amount of the air-conditioned space according to the number of people present in the air-conditioned space, identifies the infection risk based on at least the detection value of the first sensor, and determines the infection risk according to the identified infection risk. Control the air direction or air volume of the air conditioner, and control the ventilation device based on the ventilation volume.

According to the present disclosure, it is possible to provide an air-conditioning ventilation system capable of controlling not only the ventilation device but also the air-conditioning device in consideration of the infection risk of infectious diseases.

1 is a diagram showing the overall configuration of an air-conditioning and ventilation system according to Embodiment 1. FIG. 2 is a diagram showing a functional configuration of a control device according to Embodiment 1; FIG. FIG. 4 is a diagram showing the relationship between the sound volume in an air-conditioned space and the risk of infection; FIG. 4 is a diagram showing an example of evaluating the level of infection risk based on the volume and density in an air-conditioned space; It is a figure which shows the content of control of an air conditioner according to an infection risk. 4 is a flow chart showing a process of evaluating the level of infection risk based on the volume and density in the air-conditioned space. 4 is a flow chart showing a process of calculating the required ventilation volume according to the infection risk level. 4 is a flow chart showing processing for controlling an air supply device, an exhaust device, and an air conditioner (Embodiment 1). 7 is a flow chart showing processing for controlling an air supply device, an exhaust device, and an air conditioner (Embodiment 2). 9 is a flow chart showing processing for controlling an air supply device, an exhaust device, and an air conditioner (Embodiment 3). 10 is a flow chart showing processing for controlling an air supply device, an exhaust device, and an air conditioner (Embodiment 4). FIG. 12 is a diagram showing an example in which a wind direction sensor is provided near the door of a room (Embodiment 5); 14 is a flow chart showing processing for determining an optimum ventilation route based on simulation (Embodiment 5). FIG. 13 is a flow chart showing an example of a process for performing ventilation based on a determined ventilation route (Embodiment 5); FIG. 19 is a flowchart including processing for correcting the level of infection risk according to whether or not a person is wearing a mask (Embodiment 6).

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. A plurality of embodiments will be described below, but appropriate combinations of the configurations described in the respective embodiments have been planned since the filing of the application. The same or corresponding parts in the drawings are denoted by the same reference numerals, and the description thereof will not be repeated.

Embodiment 1.
FIG. 1 is a diagram showing the overall configuration of an air conditioning ventilation system 1 according to Embodiment 1. As shown in FIG. The air-conditioning ventilation system 1 functions in an air-conditioned space 80 . Air-conditioned space 80 is, for example, a floor of a building that accommodates a large number of people. The air-conditioned space 80 is divided into an area 81, an area 82, an area 83, and an area 84 by partitions.

The air-conditioned space 80 is provided with an air supply device 60 that takes in fresh air from the outside of the air-conditioned space 80 and an exhaust device 70 that discharges the air in the air-conditioned space 80 to the outside. A ventilator is configured by the air supply device 60 and the exhaust device 70 .

The upper part of the wall that constitutes the partition of the air-conditioned space 80 does not reach the ceiling surface. Therefore, the fresh air taken in by the air supply device 60 spreads over the areas 81 to 84, and the dirty air in the areas 81 to 84 is discharged to the outside by the exhaust device .

A volume sensor 41 and an air conditioner 51 are arranged in the area 81 . A volume sensor 42 and an air conditioner 52 are arranged in the area 82 . A volume sensor 43 and an air conditioner 53 are arranged in the area 83 . The volume sensor 44 and the air conditioner 54 are arranged in the area 84 .

The air conditioners 51-54 adjust the temperature of the corresponding areas 81-84.
The volume sensors 41 to 44 are examples of sensors that detect human states. Volume sensors 41 to 44 detect sounds output in accordance with human vocalizations. The volume sensors 41 to 44 can detect the state of a person, such as being silent, speaking softly, speaking loudly, and coughing well.

The air-conditioned space 80 is further provided with an image sensor 20 that constitutes a photographing device. The image sensor 20 is installed on the ceiling surface so as to photograph the areas 81-84. Image sensor 20 is an example of a sensor that detects a person's condition.

By analyzing the images detected by the image sensor 20, it is possible to specify for each of the areas 81 to 84 whether there are many people in the areas 81 to 84 or not. More specifically, the number of people in the room can be specified for each of the areas 81 to 84 from the image detected by the image sensor 20 . In other words, by using the image detected by the image sensor 20, the density of people can be specified for each of the areas 81-84. Furthermore, by analyzing the image detected by the image sensor 20, it is possible to specify the intensity of the person's movement.

The air conditioning ventilation system 1 includes the image sensor 20, sound volume sensors 41 to 44, air conditioners 51 to 54, air supply device 60, and exhaust device 70 described above. The air conditioning ventilation system 1 further includes a control device 100 that controls the entire system. The control device 100 is connected with the image sensor 20 by the communication line 11 . Control device 100 is connected to volume sensors 41 to 44 by communication line 12 . Control device 100 is connected to air conditioners 51 to 54 , air supply device 60 and exhaust device 70 via communication line 13 .

The control device 100 may communicate with the image sensor 20, the volume sensors 41 to 44, the air conditioners 51 to 54, the air supply device 60, and the exhaust device 70 not by wire but by radio.

The control device 100 includes a processor 101 and a memory 102 . The memory 102 includes ROM (Read Only Memory) and RAM (Random Access Memory). The processor 101 expands a program stored in ROM into RAM or the like and executes it. The program stored in the ROM is a program in which processing procedures of the control device 100 are described.

The control device 100 processes the detection values of the image sensor 20 and the sound volume sensors 41-44 according to the program stored in the memory 102, and controls the air conditioners 51-54, the air supply device 60 and the exhaust device 70. The control device 100 may be provided in the air-conditioned space 80 or may be provided on a floor different from the air-conditioned space 80 . The control device 100 may be provided at a location different from the building in which the air-conditioned space 80 is housed.

The control device 100 evaluates the volume in the areas 81-84 based on the detection values of the volume sensors 41-44. Here, volume is the loudness of a person's voice. The louder a person's voice, the higher the risk of catching the virus through droplets from a person's mouth. The control device 100 evaluates the volume in the areas 81-84, that is, the degree of splashing, based on the detection values of the volume sensors 41-44.

Based on the image detected by the image sensor 20, the control device 100 evaluates the density of people in the areas 81-84. The control device 100 evaluates the infection risk in the areas 81 to 84 from the two viewpoints of volume (droplet degree) and density, and controls the air conditioners 51 to 54, the air supply device 60, and the exhaust device 70 according to the evaluation. do.

FIG. 1 shows an example in which the air-conditioned space 80 is divided into four areas. However, the number of partitioned areas may be two, three, or five or more. Also, an image sensor 20 may be provided for each of the areas 81-84.

FIG. 2 is a diagram showing the functional configuration of the control device 100 according to the first embodiment. Control device 100 includes first communication unit 111 , sensor information processing unit 112 , position information processing unit 113 , second communication unit 114 , and storage unit 115 . These are functions realized by the processor 101 and the memory 102 shown in FIG.

The first communication unit 111 communicates with the image sensor 20 and volume sensors 41-44. The sensor information processing unit 112 uses the sensor information as an information source for calculating the ventilation volume and evaluating the risk of infection. The amount of ventilation can be determined by the number of people in the room on the floor and the amount of activity of the people in the room. For example, it can be evaluated that the amount of activity is large when the person in the room moves rapidly, and the amount of activity is small when the person in the room moves little.

The infection risk can be evaluated by the density that can be grasped from the positions of people in the room, the volume of voice that can be converted from the volume, and the frequency of conversation. At this time, by using the positional information indicating in which of the areas 81 to 84 the volume sensors 41 to 44 are arranged, the evaluation result for each of the areas 81 to 84 can be obtained. The position information processing unit 113 processes such position information, for example.

The sensor information processing unit 112 monitors the ventilation volume by processing sensor information from the image sensor 20 and sound volume sensors 41-44. Specifically, the sensor information processing unit 112 identifies the number of people in the room, the positions of people, and the behavior of people for each of the areas 81 to 84 by analyzing the images detected by the image sensor 20 . For example, the greater the amount of human activity per unit time, the greater the ventilation required. The sensor information processing unit 112 corrects the required ventilation volume by evaluating human behavior.

Furthermore, the sensor information processing unit 112 identifies the loudness of a person's voice for each of the areas 81-84 by analyzing the volume detected by the volume sensors 41-44.

The sensor information processing unit 112 calculates the amount of ventilation required for the air-conditioned space 80 . The sensor information processing unit 112 evaluates the infection risk in units of areas 81-84.

The position information processing unit 113 determines the control contents of the air conditioners 51 to 54, the air supply device 60, and the exhaust device 70 based on the calculated ventilation volume and the evaluation result of the infection risk in units of the areas 81 to 84. decide. At this time, the position information processing unit 113 refers to the position information of the air conditioners 51 to 54, the air supply device 60, and the exhaust device 70, and the calculated ventilation volume.

The control details determined by the position information processing unit 113 are sent from the second communication unit 114 to the air conditioners 51 to 54, the air supply device 60, and the exhaust device . The air conditioners 51 to 54, the air supply device 60, and the exhaust device 70 operate according to the contents of control.

A floor map of the air-conditioned space 80 is stored in the storage unit 115 . This floor map includes information indicating the positions of the image sensor 20, volume sensors 41-44, ventilators (air supply device 60 and exhaust device 70), and air conditioners 51-54. Furthermore, the floor map includes information on areas 81-84 that can be air-conditioned by the air conditioners 51-54.

The storage unit 115 may store a floor map in which the positions of various devices such as the image sensor 20 are associated in advance. Alternatively, storage unit 115 may store a floor map in which the positions of various devices are not associated in advance. In the latter case, the controller 100 is configured to allow the administrator to associate the location of various devices with the floor map. By doing so, the position information of the floor map can be corrected when the positions of the air conditioners 51 to 54 are moved. The storage unit 115 further stores information for evaluating the behavior of people in the room and control information for various devices.

The sensor information processing unit 112 and the position information processing unit 113 described above are implemented by the processor 101 included in the control device 100 . The control device 100 calculates the ventilation volume in consideration of human behavior. Control device 100 controls air supply device 60 and exhaust device 70 based on the calculated ventilation volume. Furthermore, the control device 100 controls the air conditioners 51 to 54 according to the infection risk.

For example, when the infection risk is high, the control device 100 increases the ventilation volume, reduces the air blow volume of air conditioners placed in areas with a high infection risk, and reduces the ventilation volume of air conditioners placed in areas with a low infection risk. You may increase the amount of air blowing.

For example, if there is a person in the room who behaves at a high risk of infection in the area 81, the control device 100 may control the air conditioner 51 in the area 81 so as not to direct the airflow to the person in the room. The control device 100 adjusts the air conditioning near the air supply port of the air supply device 60 in consideration of the change in the amount of air supplied by the air supply device 60, the change in the amount of exhaust air of the exhaust device 70, and the temperature difference between the indoor and outdoor air. The set temperature of the device 51 may be corrected.

The air-conditioned space 80 may be provided with a plurality of ventilation devices composed of the air supply device 60 and the exhaust device 70 . In this case, for example, it may be configured such that the air volume of the ventilation device can be changed in stages such as strong, medium, and weak. For example, when increasing the ventilation rate of the air-conditioned space 80, the ventilation rate of the ventilation device closer to the densely populated area among the areas 81 to 84 may be set higher than the ventilation rate of the other ventilation devices.

The user can keep the indoor air fresh by manually adjusting the ventilation volume of the ventilation device according to the number of people in the room. However, the number of people in a room and their behavior change over time. Conventionally, users have had to adjust the amount of ventilation each time to prevent the air-conditioned space from becoming an uncomfortable air environment. In addition, conventionally, users tend to operate the ventilator more than necessary in an attempt to ensure the necessary ventilation volume, resulting in energy loss.

According to the present embodiment, the control device 100 evaluates the infection risk by monitoring the position and behavior of a person, and adjusts the amount of ventilation, so appropriate ventilation can be performed automatically. Further, according to the present embodiment, by comparing the position information of the person and the air conditioner, it is possible to suppress the airflow to the person and the area with high infection risk.

FIG. 3 is a diagram showing the relationship between the sound volume in the air-conditioned space 80 and the risk of infection. The volume sensors 41-44 arranged in the air-conditioned space 80 detect the volume of human voices. Among the areas 81 to 84, the area where the voice volume is loud is considered to have a higher risk of droplet infection than the other areas. Therefore, the degree of splash can be evaluated by evaluating the sound volume.

The volume of human voices detected in areas 81 to 84 changes with time, for example, as shown in FIG. The control device 100 evaluates that there is an infection risk when the volume exceeding the threshold is detected over the time Ts shown in FIG. The controller 100 stores three thresholds v1, v2, and v3.

The control device 100 determines that the risk of infection is low when a volume v that satisfies "v1<v≤v2" is detected over time Ts. The control device 100 determines that the infection risk is high when the volume v that satisfies “v2<v≦v3” is detected over the time Ts. The control device 100 determines that the risk of infection is high when the sound volume v that satisfies "v3<v" is detected beyond the time Ts. The control device 100 determines that there is no infection risk when the volume v satisfies "v≦v1".

As a result, it is determined that there is an infection risk for the part corresponding to the fixed time in Fig. 3, and the magnitude of the infection risk is determined according to the situation. For example, in FIG. 3, t1 to t2 are at low risk of infection, t2 to t3 are at medium risk of infection, t3 to t4 are at high risk of infection, t4 to t5 are at medium risk of infection, t5 to t6 are at high risk of infection, and t6 to t7 are at high risk of infection. Among the infection risks, t7 to t8 correspond to low infection risk and t8 to no infection risk, respectively.

The control device 100 evaluates the infection risk according to the criteria shown in FIG. 3 for each area 81-84. Control device 100 evaluates the infection risk of area 81 based on the detection value of volume sensor 41 provided corresponding to area 81 . Control device 100 evaluates the infection risk of area 82 based on the detection value of volume sensor 42 provided corresponding to area 82 . Control device 100 evaluates the infection risk of area 83 based on the detection value of volume sensor 43 provided corresponding to area 83 . Control device 100 evaluates the infection risk of area 84 based on the detection value of volume sensor 44 provided corresponding to area 84 .

FIG. 4 is a diagram showing an example of evaluating the infection risk level based on the volume and density in the air-conditioned space 80. FIG. The control device 100 evaluates the degree of splashing by evaluating the volume. Therefore, the control device 100 substantially evaluates the infection risk level for each of the areas 81 to 84 from the two viewpoints of the degree of droplet droplets and the degree of density. The volume evaluation method is as described with reference to FIG. The density can be evaluated, for example, based on the size of the area and the number of people present in the area.

FIG. 4 illustrates the level of infection risk determined based on volume and density. For example, if there is no risk in the loudness evaluation and no risk in the crowding evaluation, the infection risk level is evaluated as level 1. Here, level 1 corresponds to no infection risk. If the risk level is high in the volume evaluation and the risk level is medium in the density evaluation, the infection risk level is evaluated as level 4.

It should be noted that the infection risk levels shown in FIG. 4 are merely examples. For example, control device 100 may be designed such that an administrator who manages control device 100 can arbitrarily set these levels.

FIG. 5 is a diagram showing details of control of the air conditioners 51 to 54 according to the infection risk. Control device 100 evaluates the infection risk level from the two viewpoints of volume and density, and then controls air conditioners 51 to 54 according to the evaluated level as shown in FIG.

The control shown in FIG. 5 is based on the concept of preventing viruses that may exist in areas with a high risk of infection from being scattered by the wind blown from the air conditioners 51-54. Therefore, for example, when area 81 is evaluated as level 1, ie, no risk of infection, control device 100 does not change the settings of the air direction and air volume of air conditioner 51 corresponding to area 81 .

However, when the area 81 is evaluated as level 2, the control device 100 sets the wind direction of the air conditioner 51 to a windbreak. However, the control device 100 does not change the setting of the air volume of the air conditioner 51 . When the wind direction of the air conditioner 51 is set to be a shelter from the wind, the air conditioner 51 blows air in a direction away from people while considering air conditioning efficiency. This prevents direct blowing of the wind to people in the area 81 where there is a risk of infection. On the other hand, since the setting of the air volume is not changed, the temperature of the area 81 can be kept at an appropriate value as much as possible.

When the area 81 is evaluated as level 3, the control device 100 sets the wind direction of the air conditioner 51 to shelter and the air volume to medium. As a result, for example, if the air volume of the air conditioner 51 is currently set to high, the air volume of the air conditioner 51 is forcibly reduced from high to medium. This enhances the effect of preventing viruses that may exist from being scattered not only from the viewpoint of wind direction but also from the viewpoint of wind volume.

In addition, if it is evaluated as level 3, the air volume may be changed in consideration of the original air volume setting, instead of uniformly setting the air volume to medium. For example, if the original air volume setting is low, that setting may be maintained. Also, if the original airflow setting is medium, the setting may be changed to small.

When the area 81 is evaluated as level 4, the air direction of the corresponding air conditioner 51 is set upward and the air volume is set to small. This prevents the virus from being scattered by the air blown from the air conditioner 51 in the area 81 where the risk of infection is extremely high.

Here, the details of the control of the air conditioner 51 corresponding to the area 81 have been explained, taking the area 81 as an example. The control device 100 similarly controls the air conditioner 52 corresponding to the area 82, the air conditioner 53 corresponding to the area 83, and the air conditioner 54 corresponding to the area 84 according to the infection risk level.

FIG. 6 is a flow chart showing the process of evaluating the infection risk level based on the volume and density in the air-conditioned space 80. FIG. Processing based on this flowchart is executed by the control device 100 .

First, the control device 100 acquires position information of the volume sensors 41 to 44 (step S1). As a result, on the floor map, the positions of the volume sensors 41 to 44 are associated with the areas 81 to 84 that are air-conditioned areas. Therefore, control device 100 can identify the correspondence between areas 81-84 and volume sensors 41-44. Next, the control device 100 acquires position information of the image sensor 20 (step S2).

Next, the control device 100 acquires volume from the volume sensors 41 to 44 (step S3). Thereby, the control device 100 can specify the volume for each of the areas 81-84. Next, the control device 100 acquires an image from the image sensor 20 (step S4). Image sensor 20 captures an image of conditioned space 80 including areas 81-84.

Next, the control device 100 analyzes the acquired volume and image (step S5). For example, control device 100 identifies the volume for each of areas 81 to 84 and generates volume data as described with reference to FIG. The control device 100 specifies the number of people in the room for each of the areas 81 to 84 based on the image acquired from the image sensor 20, and also specifies the amount of activity of each person.

Next, the control device 100 evaluates the density for each of the areas 81-84 (step S6). By evaluating the density, the degree of infection risk can be evaluated from the number of people present in the areas 81-84. For example, the control device 100 evaluates the density based on the result of calculating "the number of people in the area N/area size". The infection risk based on the density is evaluated, for example, in four stages of high, medium, low, and none, as shown in FIG.

Next, the control device 100 evaluates the volume for each of the areas 81-84 (step S7). Here, the evaluation of sound volume means evaluating the degree of infection risk from the volume of voices of people present in the area. That is, evaluating the volume is equivalent to evaluating the degree of splashing.

The control device 100 evaluates the volume based on the volume and the duration of the volume, as described using FIG. The risk of infection based on sound volume is evaluated in four stages of high, medium, low, and none, as shown in FIG. 4, for example.

Next, the control device 100 evaluates the infection risk level for each of the areas 81 to 84 (step S8). Here, the evaluation of the infection risk level means evaluating the infection risk level based on the density evaluation and the volume evaluation.

As explained using Figure 4, the risk of infection is evaluated in four stages from level 1 to level 4. In order to evaluate the level of infection risk from the two viewpoints of volume and density, a function for evaluating infection risk can be expressed as f = (density evaluation, volume (droplet) evaluation), for example.

Next, the control device 100 stores the level of infection risk evaluated for each of the areas 81 to 84 in the memory 102 (step S9), and ends the process. The infection risk level stored in step S9 is read out in step S12 of FIG.

FIG. 7 is a flowchart showing the process of calculating the required ventilation volume according to the infection risk level. Processing based on this flowchart is executed by the control device 100 .

First, the control device 100 sets the variable n to 1 (step S11). Next, the control device 100 reads the infection risk level for each of the areas 81 to 84 from the memory 102 (step S12). Next, the control device 100 determines whether the infection risk level of the n-th area is 1 (step S13).

Here, the n-th area is any one of areas 81-84. Each time n is updated in step S16, the target area in step S13 changes to the first area, second area, third area, and so on. For example, the first area is associated with area 81 , the second area is associated with area 82 , the third area is associated with area 83 , and the fourth area is associated with area 84 .

As already explained, level 1 infection risk means that there is no risk of infection. In step S13, for example, if it is determined that the infection risk level of the first area is 1 (YES in step S13), there is no infection risk in the first area. On the other hand, if it is determined in step S13 that the infection risk level of the first area is not 1 (NO in step S13), it means that the infection risk exists in the first area.

Regardless of whether there is an infection risk or no infection risk in step S13, the required ventilation volume (m ³ /hour) is calculated (steps S14 and S15). However, the unit ventilation D used to calculate the required ventilation differs between when there is an infection risk and when there is no infection risk. When determining that there is no infection risk, the control device 100 calculates the required ventilation volume using the unit ventilation volume D1. On the other hand, when it is determined that there is an infection risk, the control device 100 calculates the required ventilation volume using the unit ventilation volume D2. Here, D1<D2.

Steps S14 and S15 will be explained in detail. For example, if it is determined in step S13 that the infection risk level of the first area is 1, that is, that there is no infection risk, then in step S14 the required ventilation volume 1 corresponding to the first area is calculated.

The function for calculating the required ventilation volume in step S14 can be expressed as f1 (number of people, D1, α). Here, the number of people is the number of people in the target area, D1 is the unit ventilation volume, and α is the correction value of the amount of activity. The correction value for the amount of activity is a correction value that considers the amount of activity of each person present in the target area. The correction value for a person with a large amount of activity is large, and the correction value for a person with a small amount of activity is small. The required ventilation volume is calculated so as to increase as the number of people in the target floor increases and the number of people who move a lot increases.

On the other hand, if the level of infection risk in the first area is not 1, that is, if it is determined that there is an infection risk in step S13, the required ventilation volume 1 corresponding to the first area is calculated in step S15.

The function for calculating the required ventilation volume in step S15 can be expressed as f2 (number of people, D2, α). Thus, the unit ventilation volume differs between step S15 and step S14. In particular, since D1<D2 is set, even if the number of people in the room and the amount of movement of each person are the same in the two areas, the area with the risk of infection requires more ventilation than the area without the risk of infection. calculated to be

It should be noted that here, it is assumed that the volume of each area is the same. However, if the volume of each area is different, it is preferable to add a variable of the volume of the area to the functions used in steps S14 and S15.

Also, when there is an infection risk, the required ventilation volume is calculated uniformly using the unit ventilation volume D2 in step S15, but the unit ventilation volume may be changed according to the level of infection risk 2-4. For example, unit ventilation D2 is used corresponding to infection risk 2. A unit ventilation D3 is used corresponding to an infection risk of 3. A unit ventilation D4 is used corresponding to an infection risk of 4. Here, the relationship between the sizes of D2 to D4 is D2<D3<D4.

After the process of step S14 or step S15, the control device 100 updates the variable n (step S16). Next, the control device 100 determines whether or not the required ventilation volumes for all the areas 81 to 84 included in the air-conditioned space 80 have been calculated (step S17). If the required ventilation volumes for all the areas 81 to 84 have not been calculated, the control device 100 executes the process of step S12 again. The control device 100 calculates the required ventilation volumes of all the areas 81 to 84 included in the air-conditioned space 80 by repeatedly executing the processes of steps S12 to S17.

After calculating the required ventilation volumes 1 to n for all areas 81 to 84, the control device 100 sets the sum of the calculated required ventilation volumes 1 to n as the "necessary ventilation volume" (step S18). Thereby, the necessary ventilation amount for the entire air-conditioned space 80 is set. Next, the control device 100 stores the set required ventilation volume in the memory 102 (step S19), and ends the processing based on this flowchart.

FIG. 8 is a flow chart showing processing for controlling the air supply device 60, the exhaust device 70, and the air conditioners 51 to 54 (Embodiment 1). Processing based on this flowchart is executed by the control device 100 .

First, the control device 100 reads out the calculated required ventilation volume from the memory 102 (step S31). The required ventilation volume read here is the one stored in memory 102 in step S19 of FIG. Next, the control device 100 determines a ventilation volume correction value (step S32).

The correction value is the difference between the calculated required ventilation volume and the current ventilation volume. That is, the ventilation volume to be added to the current ventilation volume per unit time corresponds to the correction value. For example, if the correction value is a positive value, the operability of air supply device 60 and exhaust device 70 needs to be increased from the current level. The air supply device 60 and the exhaust device 70 are provided with fans. The operability of air supply device 60 and exhaust device 70 is, for example, the number of rotations of the fan per unit time.

Next, the control device 100 reads the infection risk level for each of the areas 81 to 84 from the memory 102 (step S33). Next, the control device 100 determines the wind direction and wind volume corresponding to the infection risk for each of the areas 81 to 84 (step S34). The control device 100 determines the wind direction and air volume according to the infection risk based on the criteria shown in FIG.

Next, the control device 100 controls the air supply device 60 and the exhaust device 70 based on the ventilation amount correction value calculated in step S32 (step S35). As a result, the operability of the air supply device 60 and the exhaust device 70 is increased in order to compensate for the ventilation volume according to the correction value. For example, when the number of people in the air-conditioned space 80 increases, and when the number of people who behave at high risk of infection increases, the amount of ventilation by the air supply device 60 and the exhaust device 70 also increases. As a result, the risk of infection within the air-conditioned space 80 can be reduced.

Next, the control device 100 controls the air conditioners 51 to 54 for each of the areas 81 to 84 based on the wind direction and air volume determined in step S34 (step S36), and ends the processing based on this flowchart.

　By step S36, the direction and volume of the air blown by the air conditioners 51-54 are controlled according to the infection risk level of the areas 81-84. Therefore, for example, when the level of infection risk in area 81 is extremely high (level 4), the wind direction of air conditioner 51 is controlled to be upward and the wind volume is small. As a result, it is possible to prevent the occurrence of new infected persons within the area 81 .

As described above, according to the present embodiment, the image sensor 20 and the sound volume sensors 41 to 44 are used to monitor the number of people in the air-conditioned space 80, their positions, and their actions, thereby evaluating infection risk. be able to. Furthermore, appropriate ventilation can be performed automatically by adjusting the ventilation volume based on the evaluation.

According to the present embodiment, the air conditioners 51 to 54 are controlled according to the infection risk, so it is possible to suppress the air currents of the air conditioners 51 to 54 from going to people and areas with a high infection risk.

According to the present embodiment, when there is no risk of infection in the air-conditioned space 80, priority can be given to both comfort and energy efficiency with the minimum required amount of ventilation. On the other hand, when there is a risk of infection in the air-conditioned space 80, control for infection suppression can be performed with priority over energy saving.

As described above, according to the present embodiment, it is possible not only to control the air supply device 60 and the exhaust device 70, but also to appropriately control the air conditioners 51 to 54 in consideration of the risk of infection with infectious diseases. An air conditioning ventilation system 1 and a control device 100 can be provided.

Embodiment 2.
Embodiment 2 will be described with reference to FIG. FIG. 9 is a flow chart showing processing for controlling the air supply device 60, the exhaust device 70, and the air conditioners 51 to 54 (second embodiment). Processing based on this flowchart is executed by the control device 100 .

In the second embodiment, the control device 100 notifies a person near the exhaust device 70 that strong exhaust will occur when the correction value of the ventilation volume exceeds the threshold. After the notification, control device 100 increases the air supply amount of air supply device 60 and the exhaust amount of exhaust device 70 .

This prevents the strong airflow toward the exhaust device 70 from hitting people near the exhaust device 70 . As a result, people near the exhaust system 70 can be prevented from being infected with viruses that may be contained in the exhaust. In the second embodiment, such a notification function is added to the first embodiment.

The flowchart in FIG. 9 will be described below. In the flowchart shown in FIG. 9, steps S41 to S44 are the same as steps S31 to S34 in the flowchart shown in FIG. 8, and steps S49 and S50 are the same as steps S35 and S36 in the flowchart shown in FIG. Therefore, the description of those steps will not be repeated here.

After step S44 in FIG. 9, the control device 100 determines whether or not the ventilation volume correction value exceeds the first threshold (step S45). The first threshold can be appropriately determined in consideration of the size of the air-conditioned space 80 . An administrator may operate the control device 100 to arbitrarily set the first threshold. If the correction value of the ventilation volume is a positive value, the control device 100 may determine YES in step S45.

When the control device 100 determines that the correction value of the ventilation volume does not exceed the first threshold, the process proceeds to step S49. If the control device 100 determines that the correction value of the ventilation volume exceeds the first threshold value, it determines whether or not there is a person near the exhaust device 70 (step S46). For example, the control device 100 identifies the presence of a person near the exhaust device 70 by analyzing the image acquired from the image sensor 20 . If a person exists within a certain area with reference to the exhaust port of the exhaust device 70 , the control device 100 may determine that the person is near the exhaust device 70 .

Note that the image sensor 20 may be further provided near the exhaust device 70 . In this case, the control device 100 identifies the presence of a person near the exhaust device 70 by analyzing an image acquired from the image sensor 20 provided near the exhaust device 70 .

When the control device 100 determines that there is a person near the exhaust device 70, the control device 100 transmits a message to the portable terminal possessed by the person to be determined (step S47). For example, the control device 100 sends a warning message to the mobile terminal, saying, "Please move away from that place because ventilation will increase." In order to implement such control, a database that associates people with mobile terminal contact information may be stored in advance in the memory 102 of the control device 100 . The control device 100 may identify a person near the exhaust device 70 by analyzing the image acquired from the image sensor 20 .

After a certain waiting time has passed since the notification to the mobile terminal (YES in step S48), the control device 100 executes the processes of steps S49 and S50. Therefore, after the person leaves the exhaust system 70, the exhaust amount of the exhaust system 70 increases. As a result, people near the exhaust system 70 can be prevented from being infected with viruses that may be contained in the exhaust.

In the flowchart of FIG. 9, the process of step S50 related to the control of the air conditioners 51 to 54 may be executed without waiting for the waiting time of step S48 to elapse.

Embodiment 3.
Embodiment 3 will be described with reference to FIG. FIG. 10 is a flow chart showing processing for controlling the air supply device 60, the exhaust device 70, and the air conditioners 51 to 54 (Embodiment 3). Processing based on this flowchart is executed by the control device 100 .

The control device 100 has a function of controlling the wind blown from the air conditioner in the area with the risk of infection to be directed toward people when there is an area with the risk of infection and there are no people outside the area. Embodiment 3 is the same as Embodiment 1 except that such functions are added to Embodiment 1. FIG.

In the first embodiment, for example, when there is an infection risk in area 81, control device 100 controls the air blown from corresponding air conditioner 51 so that it does not hit people. This prevents viruses that may exist in area 81 from spreading to other areas 82-84. However, if there are no people in the areas 82 to 84 other than the area 81, even if the virus spreads to the areas 82 to 84, the areas 82 to 84 will not be infected.

In such a case, it is desirable to prevent the spread of infection within the area 81 due to the virus remaining within the area 81 . Therefore, in the third embodiment, for example, if there is an infection risk in area 81 and there are no people in areas 82 to 84 other than area 81, control device 100 controls the air conditioner in area 81 with an infection risk. The wind blowing from 51 is controlled to be directed to a person.

The flowchart of FIG. 10 will be described below. 10, steps S61-S63 are the same as steps S31-S33 of the flowchart shown in FIG. 8, and steps S67-S69 are the same as steps S34-S36 of the flowchart shown in FIG. Therefore, the description of those steps will not be repeated here.

After step S63 in FIG. 10, the control device 100 determines whether a person exists in only one of the four areas 81 to 84 (step S64). When it is determined as NO in step S64, the control device 100 executes the process of step S67.

For example, when it is determined that a person exists only in area 81 of areas 81 to 84, control device 100 determines whether the infection risk of area 81 is higher than level 1 (step S65). That is, in step S65, the control device 100 determines whether or not there is an infection risk in the target area. When control device 100 determines in step S65 that there is no risk of infection in the target area (NO in step S65), control device 100 executes the process of step S67.

When control device 100 determines in step S65 that there is an infection risk in the target area (YES in step S65), in the only area where people exist, for example area 81, the wind direction is directed toward people and , the air volume is set large (step S66).

After step S66, the control device 100 executes steps S68 and S69. Thereby, the setting in step S66 is reflected in the control in step S69. As a result, for example, when the process of step S66 is executed targeting area 81, the air blown out from air conditioner 51 is directed at the person at the maximum air volume. As a result, it is possible to prevent viruses that may exist in the area 81 from stagnation.

Embodiment 4.
Embodiment 4 will be described with reference to FIG. FIG. 11 is a flow chart showing a process for controlling air supply device 60, exhaust device 70, and air conditioners 51-54 (fourth embodiment). Processing based on this flowchart is executed by the control device 100 .

The control device 100 has a function of setting the set temperatures of the air conditioners 51 to 54 according to the ventilation volume correction value when the ventilation volume correction value exceeds the second threshold. The fourth embodiment is the same as the first embodiment except that such functions are added to the first embodiment.

As the ventilation amount correction value increases, the temperature inside the air-conditioned space 80 fluctuates rapidly due to the influence of the outside air. As a result, it becomes difficult to maintain the air-conditioned space 80 at a comfortable temperature. Therefore, in the fourth embodiment, the control device 100 sets the set temperatures of the air conditioners 51 to 54 in accordance with the ventilation amount correction value.

The flowchart of FIG. 11 will be described below. In the flowchart shown in FIG. 11, steps S71 to S75 are the same as steps S31 to S35 in the flowchart shown in FIG. 8, and step S77 is the same as step S36 in the flowchart shown in FIG. Therefore, the description of those steps will not be repeated here.

After step S75 in FIG. 11, the control device 100 determines whether or not the ventilation volume correction value exceeds the second threshold (step S76). The second threshold can be appropriately determined in consideration of the size of the air-conditioned space 80 . The administrator may operate the control device 100 to arbitrarily set the second threshold.

When the control device 100 determines that the correction value of the ventilation volume does not exceed the second threshold, the process proceeds to step S77. When the control device 100 determines that the ventilation volume correction value exceeds the second threshold value, the control device 100 determines the set temperatures of the air conditioners 51 to 54 according to the ventilation volume correction value (step S78).

For example, when the air conditioners 51 to 54 are performing a cooling operation, the control device 100 determines the set temperature of the air conditioners 51 to 54 to be lower as the ventilation amount correction value is larger. On the other hand, when the air conditioners 51 to 54 are performing the heating operation, the control device 100 sets the set temperature of the air conditioners 51 to 54 to a higher value as the ventilation amount correction value increases.

Next, the control device 100 controls the air conditioners 51 to 54 for each of the areas 81 to 84 based on the wind direction and air volume determined in step S74 and the set temperature determined in step S78 (step S79), the processing based on this flow chart ends.

In the fourth embodiment, the set temperatures of the air conditioners 51 to 54 are appropriately adjusted according to the correction value of the ventilation amount, so even if the ventilation amount suddenly increases, the temperature in the air-conditioned space 80 is not affected by the outside air. It is possible to prevent sudden fluctuations due to receiving As a result, according to Embodiment 4, the air-conditioned space 80 can be maintained at a comfortable temperature while preventing the spread of infection by automatically changing the amount of ventilation according to the risk of infection.

Embodiments 1 to 4 described above can be combined arbitrarily. For example, control device 100 may be configured to have all the functions of the first to fourth embodiments.

A CO2 sensor that detects the amount of carbon dioxide may be provided in the air-conditioned space 80. The control device 100 may determine the required ventilation volume based on the detected value of the CO2 sensor. The control device 100 may correct the required ventilation volume determined in step S14 or step S15 based on the detected value of the CO2 sensor.

In step S8 of the flowchart in Fig. 6, the level of infection risk was evaluated from the two perspectives of density and volume. However, the level of infection risk may be assessed based on one of crowding and volume. For example, the control device 100 may evaluate the infection risk level based only on the sound volume. The control device 100 may perform the process of step S13 in FIG. 7 based on the infection risk evaluated based on one of the density and volume.

In each embodiment, the control device 100 controls the air direction and air volume of the air conditioners 51 to 54 according to the infection risk level. However, the control device 100 may control one of the wind direction and the wind volume of the air conditioners 51 to 54 according to the infection risk level. For example, control device 100 may control only the wind direction of air conditioners 51-54.

In the flowchart of FIG. 9, step S45 may be deleted. In other words, the control device 100 may transmit a message to a person near the exhaust device 70 regardless of the magnitude of the ventilation volume correction value.

In step S78 of the flowchart of FIG. 11, the control device 100 may determine the set temperature for at least one of the air conditioners 51-54. For example, control device 100 may adjust only the set temperature of air conditioner 51 and not adjust the set temperatures of air conditioners 52 to 54 in step S78.

Embodiment 5.
Next, Embodiment 5 will be described. In Embodiment 5, the control device 100 simulates the ventilation route based on the calculation result of the density and the degree of splash for each area and the area with the ventilation section (opening and closing section such as a ventilation device and a window). The control device 100 controls the air conditioner 51 and the ventilation device according to the simulation result.

For example, areas with a high degree of scattering and areas with a high degree of droplets are basically areas that should be ventilated. Therefore, in order to efficiently ventilate those areas toward the ventilation section, the air conditioner 51 also supports ventilation by blowing air or the like.

However, if there is a dense area where people are concentrated between the area with high splash rate or high splash rate and the ventilation part, the air in the area with high splash rate or high splash rate bypasses the dense area. Air-conditioning control is performed so that the air is directed toward the ventilation section. Alternatively, air conditioning control is performed such that the air in an area with a high degree of scattering or an area with a high degree of splashing is directed to the window. Alternatively, air conditioning control is performed to confine air in an area with a high degree of scattering or an area with a high degree of splashing.

A wind direction sensor 45 that detects not only the direction of the wind but also the volume of the wind may be provided near openings and closing parts such as doors and windows of a room, for example, in order to direct the air in an area with a high degree of scattering or an area with a high degree of splashing to the windows. . FIG. 12 is a diagram showing an example in which wind direction sensors 45 are provided near doors 89 of rooms 85-87. The rooms 85-87 shown in FIG. 12 are more specific than three of the areas 81-84 shown in FIG.

Here, similarly to the areas 81 to 84 shown in FIG. 1, the upper part of the wall separating the rooms 85 to 87 does not reach the ceiling surface. Therefore, air flows between the rooms 85-87. Unlike FIG. 1, FIG. 12 shows an example in which three rooms are arranged side by side. 12, illustration of the image sensor 20 and volume sensors 41 to 44 shown in FIG. 1 is omitted.

As shown in FIG. 12, wind direction sensors 45 are provided near doors 89 of rooms 85-87. Rooms 85 to 87 are provided with air conditioners 50 similar to the air conditioners 51 to 54 shown in FIG. Furthermore, the rooms 85 to 87 are provided with a window 90, which is an example of a ventilation section. Furthermore, the room 85 is provided with a ventilator 91 . Wind direction sensor 45 detects the flow of air near door 89 . This airflow is not the airflow directly blown out by the air conditioner 50 but the airflow that is naturally generated near the door 89 .

For example, when the window 90 of the room 87 is open, the wind direction sensor 45 detects airflow from near the door 89 of the room 87 toward the window 90 . Note that even if the door 89 is completely closed, there is normally a gap below the door 89 through which air flows between the room 87 and the corridor 88 . Therefore, even if the door 89 is completely closed, the wind direction sensor 45 detects the flow of air from the vicinity of the door 89 of the room 87 toward the window 90 when the window 90 is open.

For example, suppose that the control device 100 determines that the risk of infection in the room 87 is much higher than in the

other rooms

85 and 86. At this time, as a ventilation route, there is a route from the room 87 to the ventilation device 91 of the room 85 through the corridor 88 and the room 86 . However, room 86 may be occupied by many people. Thus, if the room 86 is a dense area with a high density of people, it is not preferable to select a route passing through such a dense area as the ventilation route. Therefore, in such a case, the control device 100 selects the route toward the window 90 of the room 87 as the ventilation route.

Whether or not the window 90 is open can be identified based on the detection result of the wind direction sensor 45 provided in the room 87. If the window 90 is not open, the control device 100 may send a message to the remote controller of the air conditioner 50 to prompt the window 90 to be opened. In this case, the person who notices the message opens the window 90 . Also, if the room 87 has a window other than the window 90 , a message prompting the user to open the window may be sent to the remote controller of the air conditioner 50 .

FIG. 13 is a flowchart showing the process of determining the optimum ventilation route based on simulation. Processing based on this flowchart is executed by the control device 100 .

First, the control device 100 reads the infection risk level for each of the rooms 85 to 87 from the memory 102 (step S81). This process is the same as step S12 in FIG. Next, control device 100 identifies a room to be ventilated (step S82). For example, of the rooms 85 to 87, the room with the highest risk of infection may be the room to be ventilated.

Next, the control device 100 reads the ventilation function data for each of the rooms 85 to 87 (step S83). The data on the ventilation function is, for example, data indicating the presence or absence of the ventilator 91 and the window 90 .

Next, the control device 100 simulates the ventilation route (step S84). More specifically, the control device 100 selects the optimum ventilation route based on the room to be ventilated, the position of the ventilator, and the conditions of the rooms existing from the room to be ventilated to the ventilator. As a result, for example, when a room with a high density of people exists in the middle of the route from the room to be ventilated to the ventilation device, the control device 100 optimizes the ventilation route passing through the room with a high density of people. Exclude from route targets.

Next, the control device 100 determines the optimum ventilation route based on the simulation (step S85). As a result, for example, control device 100 may select a route toward window 90 of the room to be ventilated as the ventilation route.

Next, the control device 100 controls the air conditioner 50 and the ventilation device 91 according to the determined ventilation route (step S86), and ends the process.

FIG. 14 is a flowchart showing an example of processing for performing ventilation based on the determined ventilation route. Processing based on this flowchart is executed by the control device 100 . Here, with reference to FIG. 14, the process when the route to the window 90 of the room 87 to be ventilated is selected as the ventilation route will be described.

First, the control device 100 determines whether or not ventilation should be performed through a route toward the window 90 in the room 87 to be ventilated, instead of through a ventilation route toward the ventilation device 91 . The control device 100 ends the process when the determination result is NO. When the determination result is YES, the control device 100 determines whether the window 90 of the room 87 to be ventilated is open (step S92). As described above, the control device 100 determines whether or not the window 90 of the room 87 to be ventilated is open based on the detection value of the wind direction sensor 45 provided near the door 89 .

When the window 90 of the room 87 to be ventilated is not open, the control device 100 transmits a message prompting the opening of the window 90 to the remote controller of the air conditioner 50 arranged in the room 87 to be ventilated (step S93). After that, the control device 100 checks again whether the window 90 is open (step S92).

When the window 90 is open, the control device 100 sets the air blowing volume of the air conditioner 50 arranged in the room 87 to be ventilated to the maximum (step S94). Ventilation from the window 90 is thereby performed. Next, the control device 100 notifies that the room 87 is being ventilated (step S95), and finishes the process.

For example, by causing the LED provided in the air conditioner 50 to emit light in a color corresponding to the notification content, it is notified that the room 87 is being ventilated. Alternatively, control device 100 may display a message on the remote controller of air conditioner 50 indicating that room 87 is being ventilated. Also, a message indicating that the room 87 is being ventilated may be sent to a company-issued or personally owned smart phone or the like possessed by a person in the room 87 or a person who is about to enter the room 87 .

Embodiment 6.
Next, Embodiment 6 will be described. FIG. 15 is a flowchart including processing for correcting the infection risk level depending on whether or not the person is wearing a mask. This flowchart is a modification of the flowchart shown in FIG.

As shown in step S8A of FIG. 15, the control device 100 may correct the infection risk level calculated in step S8 based on whether the person in the room is wearing a mask. In this case, the control device 100 may determine whether or not the person in the room is wearing a mask based on the image acquired by the image sensor 20 . For example, as the image sensor 20, a thermosensor that can acquire an image that makes it easy to identify whether a mask is worn or not may be used.

The control device 100 may determine the infection risk in the area by considering the percentage of people wearing masks. For example, if the sound volume detected by the sound volume sensor is high in a certain area, but everyone in that area is wearing a mask, the control device 100 may lower the infection risk determination result by one level. . Conversely, if the volume detected by the volume sensor in a certain area is low, but no one in the area is wearing a mask, the control device 100 raises the infection risk determination result by one level. good.

Next, a modified example will be explained. For example, when there is a person in the room who behaves at a high risk of infection in area 81, control device 100 may perform control to confine the air in that area. In order to prevent people from entering the area without knowing that such control is being performed, a function similar to the notification function shown in step S95 of FIG. 14 may be exhibited. In other words, the LED provided in the air conditioner 50 may emit light in a color corresponding to the content of the notification to notify that the control for confining the air is being performed. Alternatively, a message indicating the details of the control may be displayed on the remote controller of the air conditioner 50 . Alternatively, the message may be sent to a company-issued or personally owned smart phone or the like possessed by a person who is about to enter the area.

As described above, the wind direction sensor 45 that detects the air volume in addition to the wind direction is provided at the opening and closing part of the room (near the window and the door where people enter and exit), and the air flow due to the natural wind is detected. Effective ventilation may be provided. The first to sixth embodiments and various modifications described above can be combined arbitrarily.

(summary)
The above embodiment will be summarized.

(1) The present disclosure relates to an air conditioning ventilation system (1) or a control device (100). The air-conditioning system includes ventilators (60, 70) for ventilating an air-conditioned space (80), a first air-conditioner (51) for air-conditioning the air-conditioned space, and a first sensor ( 41) and a control device. The control device calculates the ventilation rate of the air-conditioned space according to the number of people present in the air-conditioned space (steps S14 and S15), and identifies the risk of virus infection based on at least the detection value of the first sensor (step S8), the air direction or air volume of the first air conditioner is controlled according to the identified infection risk (step S36), and the ventilator is controlled based on the ventilation volume (step S35).

(2) The air conditioning ventilation system further comprises a second air conditioner (52) for air conditioning the air conditioned space, and the air conditioned space corresponds to the first area (81) corresponding to the first air conditioner and the second air conditioner. and a second area (82), the control device identifies the virus infection risk for each of the first area and the second area (step S8), and according to the virus infection risk in the first area, the first air conditioner , and controls the direction or volume of air from the second air conditioner according to the risk of virus infection in the second area (step S36).

(3) The control device calculates the first ventilation volume according to the number of people present in the first area, and calculates the second ventilation volume according to the number of people present in the second area (steps S11 to Step S17), the ventilation volume is calculated including the first ventilation volume and the second ventilation volume (step S18).

(4) When the risk of virus infection is below the standard level (level 1), the control device calculates the ventilation volume using the first unit ventilation volume (step S14), and when the virus infection risk exceeds the standard level , the second unit ventilation volume, which is larger than the first unit ventilation volume, is used to calculate the ventilation volume (step S15).

(5) When the risk of virus infection in the first area exceeds the standard level (level 1), the control device controls the wind direction of the first air conditioner so that it does not hit people in the first area Control the air volume (Fig. 5).

(6) If there are people only in the first area of the air-conditioned space and the risk of virus infection in the first area exceeds the standard level (level 1), the control device will set the wind of the first air conditioner to the first The air direction or air volume of the first air conditioner is controlled so as to hit people in one area (step S66).

(7) Further equipped with a second sensor (20) for detecting the state of people present in the air-conditioned space, the first sensor is composed of sound sensors (41-44), and the second sensor is an image sensor (20). The control device identifies the degree of droplets from a person's mouth based on the detection value of the sound sensor (step S7), and identifies the degree of crowding of people based on the detection value of the image sensor (step S6), the risk of virus infection is identified based on the degree of droplet droplets and density (step S8).

(8) The ventilation device includes an air supply device (60) and an exhaust device (70), and the control device exists at the position of the exhaust device when increasing the ventilation rate of the ventilation device (YES in step S45). After warning the person (step S47), the ventilator is controlled based on the ventilation volume (step S49).

(9) The control device controls the set temperature of the first air conditioner according to the ventilation volume (step S78).

(10) Based on the infection risk for each area (85 to 87) included in the air-conditioned space and the position of the ventilator (91) or the position of the opening/closing part (90) that opens and closes to the outside of the air-conditioned space, A ventilation route is determined, and the first air conditioner (50) and the ventilation device are controlled based on the determination result (steps S81 to S86).

(11) The opening/closing section is composed of a window (90), and when the area to be ventilated is selected from among the areas included in the air-conditioned space, the control device selects a route to the opening/closing section provided in the area to be ventilated. It can be determined as a route (step S91).

(12) A wind direction sensor (45) is provided at the entrance of the area (the position of the door 89) to detect the wind direction, and the control device opens and closes the area where the wind direction sensor is installed based on the detection result of the wind direction sensor. It is determined whether or not the part is open (step S92).

(13) When the control device determines the route to the open/close unit provided in the ventilation target area as the ventilation route, it notifies that ventilation will be performed in the ventilation target area (step S95).

(14) Based on the detection value of the second sensor, the control device determines whether the person present in the air-conditioned space is wearing a mask, and if the person present in the air-conditioned space is wearing a mask , Corrected the level of infection risk identified based on the droplet rate and density to a higher level, and if the person in the air-conditioned space was wearing a mask, identified based on the droplet rate and density The infection risk level is corrected to a lower level (step S8A).

The embodiments disclosed this time should be considered illustrative in all respects and not restrictive. The scope of the present disclosure is indicated by the scope of the claims rather than the description of the above-described embodiments, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.

1 Air-conditioning ventilation system, 11-13 Communication line, 20 Image sensor (photographing device), 41-44 Sound volume sensor, 45 Wind direction sensor, 50-54 Air conditioner, 60 Air supply device, 70 Exhaust device, 80 Air-conditioned space, 81- 84 area, 85 to 87 room, 88 corridor, 89 door, 90 window, 91 ventilator, 100 control device, 101 processor, 102 memory, 111 first communication unit, 112 sensor information processing unit, 113 position information processing unit, 114 Second communication unit, 115 storage unit.

Claims

An air conditioning ventilation system,
a ventilation device for ventilating the air-conditioned space;
a first air conditioner that air-conditions the air-conditioned space;
a first sensor that detects the state of a person present in the air-conditioned space;
a control device;
The control device is
calculating the ventilation amount of the air-conditioned space according to the number of people present in the air-conditioned space;
identifying the risk of virus infection based on at least the detection value of the first sensor;
An air-conditioning and ventilation system that controls the air direction or air volume of the first air conditioner according to the identified infection risk, and controls the ventilation device based on the ventilation volume.
further comprising a second air conditioner that air-conditions the air-conditioned space;
The air-conditioned space includes a first area corresponding to the first air conditioner and a second area corresponding to the second air conditioner,
The control device is
identifying the risk of virus infection for each of the first area and the second area;
controlling the wind direction or air volume of the first air conditioner according to the risk of virus infection in the first area;
2. The air-conditioning and ventilation system according to claim 1, wherein the air direction or air volume of said second air conditioner is controlled according to the virus infection risk of said second area.
The control device is
Calculate a first ventilation volume according to the number of people present in the first area,
Calculate a second ventilation volume according to the number of people present in the second area,
3. The air-conditioning ventilation system according to claim 2, wherein said ventilation volume is calculated including said first ventilation volume and said second ventilation volume.
The control device is
If the risk of infection with the virus is below the reference level, calculate the ventilation volume using the first unit ventilation volume,
4. The air-conditioning/ventilation system according to claim 2, wherein when the risk of virus infection exceeds the reference level, the ventilation is calculated using a second unit ventilation that is larger than the first unit ventilation.
When the infection risk of the virus in the first area exceeds the reference level, the control device controls the wind direction or air volume of the first air conditioner so that the wind of the first air conditioner does not hit people in the first area. 5. The air-conditioning and ventilation system of claim 4, which controls the
In the control device, when a person exists only in the first area of the air-conditioned space and the risk of virus infection in the first area exceeds the reference level, the wind of the first air conditioner is reduced to the first area. 5. The air-conditioning and ventilation system according to claim 4, wherein the air direction or air volume of said first air conditioner is controlled so as to hit people in one area.
Further comprising a second sensor that detects the state of a person present in the air-conditioned space,
The first sensor is configured by an audio sensor,
The second sensor is configured by an image sensor,
The control device is
Identifying the degree of droplets from a person's mouth based on the detection value of the audio sensor,
Identifying the density of people based on the detection value of the image sensor,
The air-conditioning and ventilation system according to any one of claims 1 to 6, wherein the risk of virus infection is identified based on the degree of droplet droplets and the degree of density.
The ventilation device includes an air supply device and an exhaust device,
Claims 1 to 7, wherein when the ventilation volume of the ventilation device is increased, the control device controls the ventilation device based on the ventilation volume after warning a person present at the position of the ventilation device. The air conditioning ventilation system according to any one of Claims 1 to 3.
The air conditioning and ventilation system according to any one of claims 1 to 8, wherein the control device controls the set temperature of the first air conditioner according to the ventilation amount.
The control device determines a ventilation route based on the infection risk for each area included in the air-conditioned space and the position of the ventilation device or the position of the opening and closing part that opens and closes to the outside of the air-conditioned space, and based on the determination result The air-conditioning and ventilation system according to any one of claims 1 to 9, wherein the first air-conditioning device and the ventilation device are controlled by the first air-conditioning device and the ventilation device.
The opening and closing part is configured by a window,
When an area to be ventilated is selected from areas included in the air-conditioned space, the control device can determine a route toward the opening/closing unit provided in the area to be ventilated as the ventilation route. 11. Air conditioning and ventilation system according to claim 10.
A wind direction sensor is provided at the entrance of the area and detects the direction of the wind,
12. The air-conditioning/ventilating system according to claim 11, wherein said control device determines whether or not said open/close section in an area where said wind direction sensor is provided is open based on the detection result of said wind direction sensor.
13. The control device according to claim 11 or claim 12, wherein when a route toward the opening/closing unit provided in the ventilation target area is determined as the ventilation route, the control device notifies that ventilation will be performed in the ventilation target area. Air-conditioning and ventilation system as described.
The control device determines whether a person present in the air-conditioned space is wearing a mask based on the detection value of the second sensor, and determines whether the person present in the air-conditioned space is wearing a mask. In this case, the level of infection risk identified based on the droplet rate and the density is corrected to a higher level, and if the person present in the air-conditioned space is wearing a mask, the droplet rate and the density 8. The air-conditioning and ventilation system according to claim 7, wherein the level of infection risk identified based on the degree of infection is corrected to a lower level.