JP2020030010A - Ventilation system, ventilation method, ventilation notification system, ventilation notification method, and control device - Google Patents

Abstract

To provide a ventilation system, etc., capable of effectively exhausting a substance discharged in a space of a room by occurrence of a cough or a sneeze.SOLUTION: A ventilation system 10 includes a cough detection device 100 for detecting occurrence of a cough or a sneeze in a room 20; a ventilation device 300 for exhausting air in the room 20 to the outside of the room 20; and a control device 200 for controlling the ventilation device 300. The control device 200 acquires a diffusion degree that indicates the probability of a substance discharged in the room 20 by the occurrence of the cough or the sneeze being diffused in the whole space 21 of the room 20, calculates stand-by time from the time of the occurrence of the cough or the sneeze to actuation of the ventilation device 300 on the basis of the acquired diffusion degree, and causes the ventilation device 300 to be actuated after waiting for the stand-by time from a time point at which the cough detection device 100 detects the occurrence of the cough or the sneeze.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a ventilation system, a ventilation method, a ventilation notification system, a ventilation notification method, and a control device for effectively performing room ventilation.

  In Patent Document 1, the ventilation fan of the toilet is controlled to be turned on when the motion sensor installed in the toilet detects a person, and the ventilation fan of the toilet is turned off when a predetermined time has elapsed since the motion sensor stopped detecting the person. An apparatus for controlling is disclosed.

  Patent Literature 2 discloses a method for detecting the occurrence of a cough in a room and the location of the cough based on the sound in the room.

JP 2015-008763 A JP 2011-174624 A

  However, these conventional techniques have a problem in that, when coughing or sneezing occurs in a room, substances released into the space in the room due to coughing or sneezing cannot be effectively discharged.

  Thus, the present disclosure provides a ventilation system or the like that can effectively discharge substances released into a space in a room due to coughing or sneezing.

  A ventilation system according to an aspect of the present disclosure controls a cough detection device that detects occurrence of cough or sneezing in a room, a ventilation device that discharges air in the room to the outside of the room, and the ventilation device. A control device, the control device obtains a diffusivity indicating the ease with which the substance released into the room due to the occurrence of the cough or the sneeze is diffused into the entire space in the room, Based on the obtained degree of diffusion, calculate a standby time from the time of occurrence of the cough or the sneeze until the ventilator is activated, and calculate the cough or the sneeze from the time the cough detection device detects the occurrence of the cough or the sneeze. After waiting for a waiting time, the ventilation device is operated.

  A ventilation notification system according to an aspect of the present disclosure includes a cough detection device that detects the occurrence of a cough or sneeze in a room, a notification device having a notification function, and (i) the inside of the room due to the occurrence of the cough or the sneeze. And (ii) a ventilation device based on the acquired diffusion degree from the time of occurrence of the cough or the sneeze based on the obtained degree of diffusion. (Iii) notification information indicating at least one of a first notification indicating the standby time and a second notification indicating that ventilation should be performed after the standby time has elapsed. And a control device for transmitting to the notifying device, wherein the notifying device, when receiving the notifying information, notifies a user of the notifying device based on the notifying information.

  A control device according to an aspect of the present disclosure is a control device that controls a ventilation device that discharges air in a room to the outside of the room, and is released into the room due to generation of a cough or sneeze in the room. The degree of diffusion of the substance to the entire space in the room, and based on the obtained degree of diffusion, the time from when the cough or the sneeze occurs to when the ventilation device is activated. The ventilation device is operated after calculating a standby time and waiting for the standby time from the time when the cough or the sneezing is detected by the cough detection device that detects the occurrence of the cough or the sneezing in the room.

  Note that these comprehensive or specific aspects may be realized by a method, an integrated circuit, a computer program or a recording medium such as a computer-readable CD-ROM, and the method, the integrated circuit, the computer program, and the recording medium. Any combination may be implemented.

  According to the ventilation system and the like of the present disclosure, a substance released into a space in a room due to generation of cough or sneezing can be effectively discharged.

FIG. 1 is a schematic diagram of the ventilation system according to the first embodiment. FIG. 2 is a block diagram of the ventilation system according to the first embodiment. FIG. 3 is a graph showing a time change of a variation in a concentration distribution of a virus released into a space in a room due to occurrence of a cough in the first embodiment. FIG. 4A is a diagram illustrating an example of dividing a room space into a plurality of small spaces. FIG. 4B is a table illustrating an example of a relationship between a classification of a small space including a cough occurrence position and a standby time corresponding to the classification. FIG. 5 is a table showing an example of a relationship between a room size and a standby time corresponding to the size. FIG. 6 is a table illustrating an example of the relationship between the air volume of the fan and the standby time corresponding to the air volume. FIG. 7 is a sequence diagram illustrating an example of the operation of the ventilation system. FIG. 8 is a schematic diagram of the ventilation notification system according to the second embodiment. FIG. 9 is a block diagram of the ventilation notification system according to the second embodiment. FIG. 10 is a sequence diagram illustrating an example of an operation of the ventilation notification system according to the second embodiment.

(Knowledge underlying the present disclosure)
For example, by combining the technology described in Patent Literature 1 with the technology described in Patent Literature 2, it is possible to construct a system that turns on the ventilation fan when coughing is detected and turns off the ventilation fan after a certain period of time. However, in the system having this configuration, the air in the room is exhausted by the occurrence of cough as a trigger, so that air containing no virus is largely exhausted for a while immediately after the detection of the occurrence of cough. There was a possibility that the virus concentration in the inside could not be effectively reduced. In addition, in the case of an air-conditioned room such as cooling or heating, or a fragrant room, the air-conditioned or fragrant air is discharged, so There was a problem that maintenance was difficult.

  In order to solve such a problem, a ventilation system according to an embodiment of the present disclosure includes a cough detection device that detects occurrence of cough or sneezing in a room, and discharges air in the room to the outside of the room. A ventilation device, and a control device for controlling the ventilation device, wherein the control device diffuses substances released into the room due to the occurrence of the cough or the sneeze into the entire space in the room. Obtaining the diffusion degree indicating the ease, based on the obtained diffusion degree, calculates a standby time from the time of occurrence of the cough or the sneeze until activating the ventilation device, and the cough detection device detects the cough or After waiting for the standby time from the time when the occurrence of the sneezing is detected, the ventilation device is operated.

  According to this, in the ventilation system, ventilation is started by the ventilator after waiting for the standby time calculated based on the diffusion degree from the cough or sneezing occurrence time in the room by the cough detection device. Therefore, after a substance such as a virus released into the room due to coughing or sneezing is sufficiently diffused into the entire space in the room, ventilation by the ventilation device can be started. Thus, air containing a substance such as a virus in the space can be discharged to the space outside the room. Therefore, the substance released into the space in the room due to coughing or sneezing can be effectively discharged, and the risk of infection in the room can be reduced. In addition, since emission of air containing no substance or having low concentration can be reduced, air emission can be minimized. Therefore, it is easy to maintain the air-conditioned or scented state.

  The control device may calculate a shorter time as the degree of diffusion is higher as the standby time.

  According to this, the control device calculates the standby time shorter when the substance is easily diffused in the entire space than when the substance is hardly diffused, so that the ventilator can be operated more quickly. As described above, since the time until the substance is discharged can be shortened, the risk of infection in the room can be reduced.

  Further, the degree of diffusion may be higher as the size of the space in the room is smaller.

  Therefore, the control device can determine the standby time in consideration of the size of the space.

  Further, the cough detection device may further detect an occurrence position where the cough or the sneeze occurs, and the degree of diffusion may be higher at a position closer to the center than an end of the space in the room. Good.

  Therefore, the control device can determine the standby time in consideration of the position where the cough or sneeze has occurred.

  Furthermore, a fan that generates an airflow in the room may be further provided, and the degree of diffusion may be higher as the airflow of the airflow by the fan is larger.

  For this reason, the control device can determine the standby time in consideration of the air volume of the fan.

  Further, the ventilation notification system according to an aspect of the present disclosure includes a cough detection device that detects occurrence of a cough or sneeze in a room, a notification device having a notification function, and (i) the cough or the sneeze caused by the occurrence of the sneeze. Acquiring a diffusivity indicating the ease with which the substance released into the room is diffused into the entire space in the room, and (ii) based on the acquired diffusivity, from the time of occurrence of the cough or the sneeze. Calculating a standby time until the ventilator is activated, and (iii) a notification indicating at least one of a first notification indicating the standby time and a second notification indicating that ventilation is to be performed after the standby time has elapsed. And a control device for transmitting information to the notification device. The notification device, upon receiving the notification information, notifies a user of the notification device based on the notification information.

  According to this, in the ventilation notification system, the first notification indicating the standby time calculated based on the diffusion degree from the time of occurrence of cough or sneezing in the room by the cough detection device, and ventilation after the standby time has elapsed The user is notified of at least one of the second notifications indicating the fact. For this reason, the user turns on the ventilation device according to the notification, and after the substance such as a virus released into the room due to the occurrence of coughing or sneezing is sufficiently diffused into the entire space in the room, the user can use the ventilation device. Ventilation can be started. Thus, air containing a substance such as a virus in the space can be discharged to the space outside the room. Therefore, the substance released into the space in the room due to coughing or sneezing can be effectively discharged, and the risk of infection in the room can be reduced. In addition, since emission of air containing no substance or having low concentration can be reduced, air emission can be minimized. Therefore, it is easy to maintain the air-conditioned or scented state.

  Further, the control device according to an aspect of the present disclosure is a control device that controls a ventilation device that discharges air in the room to the outside of the room, and the cough or sneeze in the room causes the room to enter the room. Acquiring a diffusivity indicating the ease with which the released substance is diffused into the entire space in the room, and operating the ventilator from the time of occurrence of the cough or the sneeze based on the acquired diffusivity. Calculating a waiting time until the cough or the sneezing occurs in the room, and then, after waiting for the waiting time from the time when the cough or the sneezing is detected, activates the ventilation device.

  According to this, the control device causes the ventilator to start ventilation after waiting for a waiting time calculated based on the diffusion degree from the cough or sneezing occurrence time in the room by the cough detection device. Therefore, after a substance such as a virus released into the room due to coughing or sneezing is sufficiently diffused into the entire space in the room, ventilation by the ventilation device can be started. Thus, air containing a substance such as a virus in the space can be discharged to the space outside the room. Therefore, the substance released into the space in the room due to coughing or sneezing can be effectively discharged, and the risk of infection in the room can be reduced. In addition, since emission of air containing no substance or having low concentration can be reduced, air emission can be minimized. Therefore, it is easy to maintain the air-conditioned or scented state.

  Note that these comprehensive or specific aspects may be realized by a method, an integrated circuit, a computer program or a recording medium such as a computer-readable CD-ROM, and the method, the integrated circuit, the computer program or the recording medium. Any combination may be implemented.

  Hereinafter, embodiments will be specifically described with reference to the drawings.

  Each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, constituent elements, arrangement positions and connection forms of constituent elements, steps, order of steps, and the like shown in the following embodiments are merely examples, and do not limit the present disclosure. In addition, among the components in the following embodiments, components not described in the independent claims indicating the highest concept are described as arbitrary components.

(Embodiment 1)
[1-1. Constitution]
FIG. 1 is a schematic diagram of the ventilation system according to the first embodiment. FIG. 2 is a block diagram of the ventilation system according to the first embodiment.

  1 and 2, the ventilation system 10 is a system for ventilating the air in a space 21 in a room 20 and includes a cough detection device 100, a control device 200, and a ventilation device 300. The ventilation system 10 may further include a fan 400.

  The cough detection device 100 detects the occurrence of a cough or sneeze in the room 20. Hereinafter, cough or sneezing is referred to as cough. The cough detection device 100 has a microphone 110, a camera 120, a control unit 130, and a transmission unit 140.

  The microphone 110 detects a sound generated in the room 20. The microphone 110 is fixed to, for example, a wall, a ceiling, or a floor of the room 20 or a fixture in the room 20.

  The camera 120 captures an image of the space 21 of the room 20. The camera 120 is fixed to a wall, a ceiling, furniture in the room 20, and the like so that an imaging range includes the space 21 of the room 20.

  The control unit 130 detects the occurrence of cough in the room 20 by analyzing the sound detected by the microphone 110. The control unit 130 specifically determines whether or not the sound acquired from the microphone 110 includes a component of the sound generated by the occurrence of the cough, and determines whether the component of the specific sound generated by the occurrence of the cough is included. If it is determined that the cough is included, it is detected that a cough has occurred in the room 20. When determining that the sound obtained from microphone 110 does not include a specific sound component, control unit 130 determines that coughing has not occurred in room 20. The specific sound component is, for example, a sound in a specific frequency band emitted from a person when a cough occurs. For example, the control unit 130 may determine that the sound detected by the microphone 110 includes a specific sound component when the sound pressure of a specific frequency band is equal to or higher than a predetermined sound pressure level. Good.

  The cough detection device 100 detects a cough of a person, but may detect a cough of an animal other than a person such as a dog without being limited to a person.

  Although the cough detection device 100 detects the position of the coughing person using the image captured by the camera 120, the coughing detection device 100 may detect the position of the person using thermography, or may use the distance sensor to detect the position of the coughing person. The position of the person may be detected. When using thermography, it may be specified that a person is present in a specific temperature zone including a person's body temperature. When a distance sensor is used, it may be specified that there is a person at a position where the difference is large by comparing the detection result of the space 21 acquired when no person is present with the current detection result. Further, the cough detection device 100 may detect the position of a person who has coughed by using an array microphone.

  When detecting the occurrence of a cough in the room 20, the control unit 130 analyzes the image captured by the camera 120 to detect the position of the cough in the room 20. For example, when a person is reflected in the video, the control unit 130 may detect a cough occurrence position by specifying the position of the reflected person in the room 20. In this case, the control unit 130 may detect the coughing occurrence position by analyzing images before and after the coughing occurrence is detected and recognizing a coughing person.

  The control unit 130 causes the transmission unit 140 to transmit the occurrence information including the cough occurrence time and the occurrence position to the control device 200.

  The control unit 130 may be realized by, for example, a processor, a memory, or the like, or may be realized by a dedicated circuit.

  The transmission unit 140 acquires the occurrence information from the control unit 130 and transmits the occurrence information to the control device 200. The transmission unit 140 is realized, for example, by a communication IF (Interface) that is communicably connected to the control device 200 via a network. The communication IF is an interface corresponding to a communication standard such as a wireless LAN standard, a wired LAN standard, and a Bluetooth (registered trademark) standard.

  The control device 200 controls the ventilation device 300. The control device 200 controls the operation timing of the ventilation device 300 according to the detection result of the occurrence of cough by the cough detection device 100. The control device 200 includes a communication unit 210, a calculation unit 220, and a control unit 230.

  The communication unit 210 performs communication with each of the cough detection device 100, the ventilation device 300, and the fan 400. The communication unit 210 acquires the occurrence information from the cough detection device 100.

  When the occurrence information is acquired by the communication unit 210, the calculation unit 220 acquires the degree of diffusion indicating how easily the substance released into the room 20 due to the occurrence of cough is diffused into the entire space 21 of the room 20. . In other words, the easiness of diffusion is the easiness of uniformization of the substance released into the room 20 due to the occurrence of cough in the space 21 of the room 20. The calculation unit 220 may acquire the diffusion degree from a storage unit (not shown) included in the control device 200, for example. The storage unit is, for example, an auxiliary storage device, such as a hard disk drive (HDD) or a solid state drive (SSD), and has a value indicating a diffusion degree input by a user and a value indicating a diffusion degree obtained from an external device. May be stored.

  The calculation unit 220 calculates a standby time from the time of occurrence of a cough to the time when the ventilator 300 is activated, based on the acquired degree of diffusion. The calculation unit 220 calculates a shorter time as the diffusion degree is higher, as a standby time. That is, when the acquired diffusion degree is the second diffusion degree higher than the first diffusion degree (that is, easily diffused), the calculation unit 220 calculates the first standby state when the first diffusion degree is acquired. A second standby time shorter than the time is calculated.

  The control unit 230 activates the ventilation device 300 after waiting for the standby time calculated by the calculation unit 220 from the occurrence time that is the time when the cough detection device 100 detects the occurrence of cough. Specifically, the control unit 230 starts counting the time at the occurrence time, that is, from the time when the communication unit 210 acquires the occurrence information, and operates the ventilation device 300 when the counted time reaches the standby time. The control unit 210 causes the communication unit 210 to transmit the control signal to the ventilation device 300. As a result, the ventilation device 300 operates after the standby time has elapsed from the occurrence time. For this reason, the ventilator 300 can operate when the substance such as the virus released into the space 21 by the cough spreads uniformly throughout the space 21.

  Further, the control unit 230 stops the ventilation device 300 after a predetermined time has elapsed since the activation of the ventilation device 300. Specifically, the control unit 230 starts counting time after transmitting a control signal for activating the ventilator 300 to the communication unit 210, and when the counted time reaches a predetermined time, the control unit 230 activates the ventilator 300. The control unit 210 causes the communication unit 210 to transmit a control signal to be stopped to the ventilation device 300. Thus, the ventilator 300 can be operated for a predetermined operation time, and for example, can be stopped at a timing when the concentration of a substance such as a virus released into the space 21 by the cough becomes lower than the predetermined concentration. it can. The predetermined time may be set to a different time according to the amount of a substance such as a virus. For example, the predetermined time may be set to be larger as the number of times of coughing occurring at the same timing can be considered. In addition, when the concentration of the substance is detected, the predetermined time does not have to be set, and the ventilation operation of the ventilator 300 is stopped at a timing when the concentration of the detected substance is lower than the predetermined concentration. May be done.

  For the predetermined time, for example, based on the exhaust air volume of the ventilator 300, a decrease in the average virus concentration obtained by CFD (Computational Fluid Dynamics) is calculated, and the average virus concentration is determined in advance. The time may be set to a time estimated to be lower than the threshold value. The predetermined time may be, for example, 5 minutes.

  The ventilator 300 is disposed in the room 20 and exhausts the air in the space 21 of the room 20 to an external space. The ventilation device 300 ventilates the air in the room 20 by performing exhaust. The ventilation device 300 is realized by, for example, a fan and a motor that rotates the fan. Ventilation apparatus 300 receives a control signal from control apparatus 200, and drives a motor based on the received control signal to rotate a fan, or stops a motor to stop a fan. As a result, the ventilation device 300 starts and ends the ventilation of the air in the room 20.

  The fan 400 is a device that generates an airflow in the room 20. The fan 400 is, for example, a circulator that circulates the air in the room 20 in the space 21. The fan 400 may be, for example, a ceiling fan as shown in FIG. 1, a wall-mounted fan, or a portable fan. The fan 400 may have a variable air volume. The fan 400 may be set to one of “large”, “medium”, and “small” in the order of the air volume, and adjusts the rotation speed of the motor so that the air volume becomes a size corresponding to the set air volume. It may be adjusted.

[1-2. Calculation method of waiting time]
Next, a specific example of a method of calculating the standby time by the calculation unit 220 of the control device 200 will be described with reference to FIGS.

  The calculation unit 220 may calculate a different standby time depending on the cough occurrence position. That is, in this case, the diffusion degree used by the calculation unit 220 is, for example, position information indicating the occurrence position in the space 21 where the cough has occurred. The calculation unit 220 processes the position information indicating the occurrence position as a degree of diffusion indicating that a substance is more easily diffused into the entire space 21 as the position is closer to the center than the end of the space in the room. That is, the diffusivity is higher at a position closer to the center than the end of the space in the room 20.

  FIG. 3 is a graph showing a time change of a variation in a concentration distribution of a virus released into a space in a room due to occurrence of a cough in the first embodiment. In FIG. 3, the horizontal axis indicates the elapsed time when the time when the cough occurs is set to 0, and the vertical axis indicates each of the plurality of small spaces when the space 21 in the room 20 is divided into the plurality of small spaces. Shows the variation value of the density at The graph of FIG. 3 shows that the space 21 in the room 20 is divided into a plurality of small spaces in a mesh shape, and the concentration of the virus obtained in each of the plurality of divided small spaces is obtained by CFD (Computational Fluid Dynamics). It is obtained by calculating a variation value. The concentration variation value is, for example, a CV (Coefficient of Variance) value (%), and is a value obtained by dividing the standard deviation of the virus concentration by the average value of the virus concentration. FIG. 3 shows a temporal change in density variation when the cough occurrence position in the space 21 of the room 20 is changed as a parameter. FIG. 3 shows, as cough occurrence positions, the temporal change in the variation in density when the density is changed between the center of the bottom of the room 20 (ie, the center of the room) and the corner of the bottom of the room 20 (ie, the corner of the room). ing.

  As shown in FIG. 3, as time passes, the virus spreads evenly in the space 21 in the room 20. Therefore, the variation value gradually decreases under any of the conditions. For example, in the graph of FIG. 3, by setting the threshold value Th of the variation value in advance, the time required for the variation value of the threshold value Th to become equal to the time required for the virus to become uniform according to the cough occurrence position. Can be determined as That is, the time until the variation value of the threshold Th becomes the waiting time can be determined. In the example of FIG. 3, the threshold value Th is set to, for example, 10%. Thus, for example, when the cough occurrence position is at the center of the room, the time required for the virus to be uniform to the threshold value Th is 40 s, and when the cough occurrence position is at the corner of the room, the time until the threshold value Th is reached. The time required for the virus to homogenize is 55 s. In this way, it can be seen that the closer the coughing position is to the center of the space in the room than the end of the space, the more easily the substance is diffused throughout the space 21 of the room 20.

  A method of dividing the space 21 of the room 20 will be described with reference to FIG. 4A.

  FIG. 4A is a diagram illustrating an example of dividing a room space into a plurality of small spaces. FIG. 4A shows a view of room 20 from above.

  For example, as shown in FIG. 4A, the space 21 of the room 20 may be divided into nine small spaces by dividing the space 21 into three in the vertical direction and the horizontal direction at equal intervals. In the example of FIG. 4A, the plurality of small spaces are a corner area “A” which is a space at a corner of a room, a side area “B” which is a space at a position of a side excluding a corner of the room, and a center of the room. Are classified into three types of areas, namely, a central area “C” which is a space at the position.

  The number of divisions in the vertical direction and the horizontal direction is not limited to three, may be two, or may be four or more. The number of divisions in the vertical direction and the horizontal direction may not be equal. For example, when the vertical width d of the room is different from the horizontal width w, the number of divisions in the vertical direction and the horizontal width are set so that the vertical width and the horizontal width of the small space are close to each other. The number of divisions in the direction may be determined.

  FIG. 4B is a table illustrating an example of a relationship between a classification of a small space including a cough occurrence position and a standby time corresponding to the classification. As the waiting time associated with each area in the table of FIG. 4B, a result calculated in advance by a simulation as shown in FIG. 3 may be used, or when a cough is generated in each area. Alternatively, the result of the variation value when the time change of the virus concentration is measured in each area may be used. In the examples of FIGS. 4A and 4B, the small space is classified into three areas in the order closer to the center of the room. However, the small space may be classified into four or more areas in the order closer to the center of the room, or two areas. May be classified.

  The calculation unit 220 calculates the standby time according to the cough occurrence position, for example, using the table illustrated in FIG. 4B. When the cough occurrence position is included in the small space classified into the corner area “A”, the calculation unit 220 calculates a standby time of 55 seconds. Similarly, when the cough occurrence position is included in the small space classified into the side area “B”, the calculation unit 220 calculates a standby time of 44 sec, and classifies the cough occurrence position into the central area “C”. If it is included in the small space, a standby time of 40 seconds is calculated.

  The calculating unit 220 may calculate a different waiting time according to the size of the space 21 of the room 20. That is, the diffusion degree used by the calculation unit 220 in this case is, for example, space information that is information indicating the size of the space 21 in the room 20. The calculating unit 220 processes the spatial information as a diffusion degree indicating that the smaller the space in the room, the easier the substance is to diffuse in the entire space 21. That is, the diffusion degree is higher as the size of the space 21 in the room 20 is smaller.

  FIG. 5 is a table showing an example of a relationship between a room size and a standby time corresponding to the size.

The calculation unit 220 calculates the standby time according to the size of the space 21 using, for example, the table illustrated in FIG. Calculating unit 220, if the size of the room is 10 m ^2, to calculate the waiting time of 40 sec, when the size of the room is 20 m ^2, and calculates the wait time 55Sec, room size may of 30 m ^2, of 65sec Calculate the waiting time.

  In FIG. 5, the floor area is used as the size of the room, but the volume of the space may be used in consideration of the height of the room. FIG. 5 shows an example in which the standby time is associated with each room size. However, the room size is classified into a plurality of size widths for each predetermined range, and the standby time is set for each size width. The room size and the standby time may be associated with each other in a monotonically increasing graph in which the standby time becomes longer as the room size increases.

  Further, the calculation unit 220 may calculate a different standby time according to the air volume of the fan 400. That is, the diffusion degree used by the calculation unit 220 in this case is, for example, air volume information indicating the air volume of the fan 400. The calculation unit 220 processes the air volume information as a degree of diffusion indicating that the larger the air volume, the more easily the substance is diffused throughout the space 21. That is, the degree of diffusion is higher as the airflow of the fan 400 is larger.

  FIG. 6 is a table illustrating an example of the relationship between the air volume of the fan and the standby time corresponding to the air volume.

  The calculation unit 220 calculates the standby time according to the air volume of the driven fan 400 using, for example, the table shown in FIG. The calculation unit 220 calculates a standby time of 35 seconds when the fan 400 is operating at the air volume “large”, and calculates a standby time of 50 seconds when the fan 400 is operating at the air volume “medium”. If the 400 is operating with a small air flow, a standby time of 65 sec is calculated.

  The calculating unit 220 responds to any one of the position information indicating the cough occurrence position, the space information indicating the size of the space 21 in the room 20, and the air volume information indicating the air volume at which the fan 400 is operating. Although the standby time is calculated by using the above, the standby time may be calculated using a combination of two or more of these three pieces of information. For example, when three pieces of information are combined, the standby time is calculated so as to be shorter as the cough occurrence position is closer to the center, to be shorter as the size of the space 21 is smaller, and to be shorter as the air volume of the fan 400 is larger. You.

  The diffusivity may be room temperature information indicating the room temperature of the room 20 other than the position information, the space information, and the air volume information, or may be information indicating the position of furniture and the like arranged in the room 20. You may. The room temperature of the room 20 indicates that the higher the temperature, the more easily the room temperature is diffused throughout the space 21 of the room 20. The position of the furniture indicates that the furniture is not so diffused that it blocks the circulation of air in the space 21.

[1-3. motion]
Next, the operation of the ventilation system 10 will be described with reference to FIG.

  FIG. 7 is a sequence diagram illustrating an example of the operation of the ventilation system.

  First, the cough detection device 100 detects a cough (or sneeze) (S101). At this time, the cough detection device 100 may detect a cough occurrence position in the space 21 in the room 20.

  Then, the cough detection device 100 transmits the occurrence information including the cough occurrence time and the occurrence position to the control device 200 as a detection result (S102).

  Next, the control device 200 receives the detection result (S103).

  The control device 200 acquires the degree of diffusion (S104). The control device 200 may acquire the occurrence position included in the occurrence information as the detection result as the diffusion degree, may acquire the spatial information input by the user as the diffusion degree, or operates the fan 400. The air volume information indicating the current air volume may be acquired as the degree of diffusion, or a combination of two or more of the occurrence position, the space information, and the air volume information may be acquired as the degree of diffusion.

  The control device 200 calculates a standby time according to the obtained diffusion degree (S105). Specifically, the control device 200 calculates the standby time using a table as shown in FIGS. 4A to 6.

  The control device 200 waits for the calculated standby time (S106), and transmits a control signal for operating the ventilation device 300 to the ventilation device 300 when the standby time has elapsed (S107).

  When receiving the control signal for operating the ventilator 300 from the control device 200 (S108), the ventilator 300 starts ventilation by driving the motor (S109).

  On the other hand, when transmitting the control signal in step S107, control device 200 waits for a predetermined time (S110), and transmits a control signal to stop ventilation device 300 to ventilation device 300 when the predetermined time has elapsed (S111). .

  Then, upon receiving a control signal for stopping the ventilation device 300 from the control device 200 (S112), the ventilation device 300 stops ventilation by stopping the motor (S113).

  Note that the control device 200 waits for a predetermined time and transmits a control signal to stop the operation of the ventilator 300 when the predetermined time has elapsed to the ventilator 300. However, the present invention is not limited to this, and the ventilator 300 starts ventilation. The ventilation may be stopped after a predetermined time elapses after waiting for a predetermined time.

[1-4. Effects etc.]
The ventilation system 10 according to the present embodiment includes a cough detection device 100 that detects the occurrence of cough or sneezing in the room 20, a ventilation device 300 that discharges air in the room 20, and a control device that controls the ventilation device 300. 200. The control device 200 acquires a degree of diffusion indicating how easily a substance released into the room 20 due to coughing or sneezing is diffused into the entire space 21 in the room 20. Control device 200 calculates a standby time from the time of occurrence of a cough or a sneeze to the time when ventilation device 300 is activated, based on the acquired degree of diffusion. The control device 200 activates the ventilation device 300 after waiting for a standby time from the time when the cough detection device 100 detects the occurrence of cough or sneezing.

  In the ventilation system 10, after the cough detection device 100 waits for a waiting time calculated based on the diffusion degree from the time of occurrence of cough or sneeze in the room 20, ventilation is started by the ventilation device 300. Therefore, after the substance such as a virus released into the room 20 due to the occurrence of cough or sneeze is sufficiently diffused to the entire space 21 in the room 20, the ventilation by the ventilation device 300 can be started. Thus, air containing a substance such as a virus in the space 21 can be discharged to the space outside the room 20. Therefore, substances released into the space in the room due to coughing or sneezing can be effectively discharged, and the risk of infection in the room 20 can be reduced. In addition, since emission of air containing no substance or having low concentration can be reduced, air emission can be minimized. Therefore, it is easy to maintain the air-conditioned or scented state.

  In ventilation system 10 according to the present embodiment, control device 200 calculates a shorter time as the degree of diffusion is higher, as a standby time. That is, the control device 200 calculates a shorter waiting time in the first state in which the substance is easily diffused in the entire space 21 than in the second state in which the substance is less easily diffused than the first state. Can be operated faster. As described above, since the time until the substance is discharged can be shortened, the risk of infection in the room 20 can be reduced.

  In the ventilation system 10 according to the present embodiment, the degree of diffusion is higher as the size of the space 21 in the room 20 is smaller. Therefore, control device 200 can determine the standby time in consideration of the size of space 21.

  Further, in ventilation system 10 according to the present embodiment, cough detection device 100 further detects an occurrence position where a cough or a sneeze occurs. The diffusivity is higher at a position closer to the center than the end of the space 21 in the room 20. Therefore, control device 200 can determine the standby time in consideration of the position where the cough or sneeze has occurred.

  The ventilation system 10 according to the present embodiment further includes a fan 400 that generates an airflow in the room 20. The degree of diffusion is higher as the airflow of the fan 400 is larger. Therefore, control device 200 can determine the standby time in consideration of the air volume of fan 400.

(Embodiment 2)
[2-1. Constitution]
FIG. 8 is a schematic diagram of the ventilation notification system according to the second embodiment. FIG. 9 is a block diagram of the ventilation notification system according to the second embodiment. 8 and 9, the same components as those in FIGS. 1 and 2 in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

  As shown in FIGS. 8 and 9, the ventilation notification system 10A includes a notification device 500 that notifies the standby time calculated by the control device 200, in addition to the components of the ventilation system 10 according to the first embodiment. However, this is different from the ventilation system 10 according to the first embodiment. Further, in ventilation notification system 10A, control device 200 differs from ventilation system 10 according to Embodiment 1 in that ventilation device 300 need not be controlled.

  Specifically, the control unit 230 of the control device 200, based on the standby time calculated by the calculation unit 220, a first notification indicating the standby time, and a message indicating that ventilation is to be performed after the standby time. The communication unit 210 transmits to the notification device 500 notification information indicating at least one of the second notifications.

  Upon receiving the notification information, the notification device 500 notifies the user of the notification device 500 based on the notification information. That is, the notification device 500 notifies the user of at least one of the first notification and the second notification included in the notification information. The notification device 500 may notify the user by displaying at least one of the first notification and the second notification on a display or the like, or may notify the user by outputting the sound from a speaker or the like. Good. When performing the second notification, the notification device 500 may count down the standby time and display the same, and may also perform a display prompting to turn on the ventilation device 300 when the standby time has elapsed. The notification device 500 may be a device included in the control device 200. Notification device 500 may be a mobile terminal such as a smartphone or a tablet terminal.

[2-2. motion]
FIG. 10 is a sequence diagram illustrating an example of an operation of the ventilation notification system according to the second embodiment.

  In ventilation notification system 10A according to the second embodiment, operations similar to those in steps S101 to S106 in the operation of ventilation system 10 according to the first embodiment are performed, and subsequent operations are different. Therefore, different operations will be described.

  After step S106, control device 200 transmits notification information indicating at least one of the first notification and the second notification (S107A).

  Upon receiving the notification information (S108A), the notification device 500 notifies the user of the notification device 500 based on the notification information (S109A).

[2-3. Effects etc.]
The ventilation notification system 10A according to the present embodiment includes a cough detection device 100 that detects occurrence of a cough or sneeze in the room 20, a notification device 500 having a notification function, and a control device 200. The control device 200 acquires (ii) the degree of diffusion indicating the ease with which the substance released into the room 20 due to the occurrence of cough or sneeze is diffused into the entire space 21 in the room 20, and (ii) acquires the degree of diffusion. Based on the degree of diffusion, a standby time from the time of occurrence of a cough or a sneeze to activation of the ventilator 300 is calculated, and (iii) a first notification indicating the standby time, and a message indicating that ventilation is to be performed after the standby time has elapsed. The notification information indicating at least one of the second notifications indicating the notification is transmitted to the notification device 500. Upon receiving the notification information, the notification device 500 notifies the user of the notification device 500 based on the notification information.

  In the ventilation notification system 10A, a first notification indicating the standby time calculated based on the degree of diffusion from the cough or sneeze occurrence time in the room 20 by the cough detection device 100, and a message indicating that ventilation should be performed after the standby time has elapsed. The user is notified of at least one of the second notifications shown. For this reason, the user turns on the ventilator 300 according to the notification, and after the substance such as the virus released into the room 20 due to the occurrence of cough or sneeze is sufficiently diffused into the entire space 21 in the room 20, Then, the ventilation by the ventilation device 300 can be started. Thus, air containing a substance such as a virus in the space 21 can be discharged to the space outside the room 20. Therefore, substances released into the space in the room due to coughing or sneezing can be effectively discharged, and the risk of infection in the room 20 can be reduced. In addition, since the emission of air containing no substance or low concentration can be reduced, the emission of air can be minimized. Therefore, it is easy to maintain the air-conditioned or aroma state.

  In each of the above embodiments, each component may be configured by dedicated hardware, or may be realized by executing a software program suitable for each component. Each component may be realized by a program execution unit such as a CPU or a processor reading and executing a software program recorded on a recording medium such as a hard disk or a semiconductor memory. Here, the software for realizing the image decoding device and the like in each of the above embodiments is the following program.

  That is, the program includes, in a computer, a cough detection device that detects the occurrence of cough or sneezing in a room, a ventilation device that discharges air in the room to the outside of the room, and a control device that controls the ventilation device. Wherein the cough detection device detects the occurrence of a cough or sneeze in the room, and the control device is released into the room by the occurrence of the cough or the sneeze. The degree of diffusion of the substance to the entire space in the room, and based on the obtained degree of diffusion, the time from when the cough or the sneeze occurs to when the ventilation device is activated. Calculate a standby time, and after waiting for the standby time from the time when the cough detection device detects the occurrence of the cough or the sneezing, the ventilation device A control signal for moving and transmitted to the ventilator, the ventilator receives the control signal to execute the ventilation method of starting the evacuation of air in the room in response to the control signal received.

  Further, the program is a ventilation notification method in a ventilation notification system including a computer, a cough detection device that detects the occurrence of cough or sneezing in a room, a notification device having a notification function, and a control device, A cough detection device detects the occurrence of a cough or sneeze in the room, and the control device causes the substance released into the room by the cough or the sneeze to diffuse into the entire space in the room. A diffusion degree indicating ease is acquired, and based on the acquired diffusion degree, a standby time from when the cough or the sneeze occurs to when a ventilation device is activated is calculated, and a first notification indicating the standby time is calculated. And transmitting, to the notification device, notification information indicating at least one of a second notification indicating that ventilation is to be performed after waiting for the standby time. Location receives the notification information, to execute the ventilating notification method of notifying based on the notification information to a user of the notification apparatus.

  As described above, the ventilation system, the ventilation method, the ventilation notification system, the ventilation notification method, and the control device according to one or more aspects have been described based on the embodiment, but the present disclosure is limited to this embodiment. Not something. Unless departing from the gist of the present disclosure, various modifications conceivable by those skilled in the art may be applied to the present embodiment, and forms configured by combining components in different embodiments are also included in the scope of the present disclosure. You may.

  INDUSTRIAL APPLICABILITY The present disclosure is useful as a ventilation system or the like that can effectively discharge substances released into a space in a room due to coughing or sneezing.

Reference Signs List 10 ventilation system 10A ventilation notification system 20 room 21 space 100 cough detection device 110 microphone 120 camera 130 control unit 140 transmission unit 200 control device 210 communication unit 220 calculation unit 230 control unit 300 ventilation device 400 fan 500 notification device

Claims (9)

A cough detection device that detects the occurrence of cough or sneezing in the room;
A ventilation device for discharging air in the room to the outside of the room,
And a control device for controlling the ventilation device,
The control device includes:
Acquiring a diffusivity indicating the ease with which the substance released into the room due to the occurrence of the cough or the sneeze is diffused into the entire space in the room,
Based on the obtained degree of diffusion, to calculate the standby time from the time of occurrence of the cough or the sneeze until activating the ventilator,
A ventilation system that activates the ventilation device after waiting for the standby time from the time when the cough detection device detects the occurrence of the cough or the sneezing. The ventilation system according to claim 1, wherein the control device calculates a shorter time as the diffusion degree is higher, as the standby time. The ventilation system according to claim 1, wherein the degree of diffusion is higher as the size of the space in the room is smaller. The cough detection device further detects an occurrence position where the cough or the sneeze has occurred,
The ventilation system according to any one of claims 1 to 3, wherein the diffusivity is higher at a position closer to the center than an end of the space in the room. Furthermore, a fan that generates an air flow in the room is provided,
The ventilation system according to any one of claims 1 to 4, wherein the degree of diffusion is higher as a flow rate of the airflow by the fan is larger. A ventilation method in a ventilation system, comprising: a cough detection device that detects the occurrence of cough or sneezing in a room; a ventilation device that discharges air in the room to the outside of the room; and a control device that controls the ventilation device. And
The cough detection device detects the occurrence of cough or sneeze in the room,
The control device,
Acquiring a diffusivity indicating the ease with which the substance released into the room due to the occurrence of the cough or the sneeze is diffused into the entire space in the room,
Based on the obtained degree of diffusion, to calculate the standby time from the time of occurrence of the cough or the sneeze until activating the ventilator,
After waiting for the waiting time from the time when the cough detection device detects the occurrence of the cough or the sneezing, transmits a control signal to activate the ventilation device to the ventilation device,
The ventilator,
Receiving the control signal;
A ventilation method for starting exhausting air in the room in response to the received control signal. A cough detection device that detects the occurrence of cough or sneezing in the room;
A notification device having a notification function,
(I) acquiring a diffusivity indicating the ease with which the substance released into the room due to the occurrence of the cough or the sneeze is diffused into the entire space in the room; and (ii) acquiring the diffusivity. Calculating a standby time from the time of occurrence of the cough or the sneeze to a time when the ventilator is activated, and (iii) a first notification indicating the standby time, and a message indicating that ventilation is to be performed after the standby time has elapsed. And a control device for transmitting notification information indicating at least one of the second notification indicating to the notifying device,
When receiving the notification information, the notification device notifies the user of the notification device based on the notification information. A cough detection device that detects the occurrence of cough or sneezing in a room, a notification device having a notification function, and a ventilation notification method in a ventilation notification system including a control device,
The cough detection device detects the occurrence of cough or sneeze in the room,
The control device,
Acquiring a diffusivity indicating the ease with which the substance released into the room due to the occurrence of the cough or the sneeze is diffused into the entire space in the room,
Based on the obtained degree of diffusion, to calculate a standby time from the time of occurrence of the cough or the sneeze until the ventilator is activated,
A first notification indicating the standby time, and notification information indicating at least one of a second notification indicating that ventilation is to be performed after the standby time is transmitted to the notification device,
The notification device,
Receiving the notification information,
A ventilation notification method for notifying a user of the notification device based on the notification information. A control device that controls a ventilation device that discharges air in a room to the outside of the room,
Acquiring a diffusivity indicating the ease with which substances released into the room by the occurrence of cough or sneeze in the room are easily diffused into the entire space in the room,
Based on the obtained degree of diffusion, to calculate the standby time from the time of occurrence of the cough or the sneeze until activating the ventilator,
A control device that activates the ventilator after waiting for the standby time from the time when the cough or the sneeze is detected in the room, when the cough detection device detects the occurrence of the cough or the sneeze.

Images