JP2022050792A - Ventilation system - Google Patents

Abstract

To provide a ventilation system that can perform ventilation with a more appropriate air flow.SOLUTION: A ventilation system 1 or 1a according to the present disclosure comprises a first ventilation device 11 or 11a for ventilating a first area A1 of an indoor space S1, a second ventilation device 21 or 21a for ventilating a second area A2 of the indoor space S1, an identification unit 30 for identifying an area needing ventilation, out of the first area A1 and the second area A2, and a control unit 40 for controlling at least one of the first ventilation device 11 or 11a and the second ventilation device 21 or 21a so as to generate an air flow F1 toward the first area A1 from the second area A2 when the identification unit 30 identifies the first area A1 as the area needing ventilation.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to a ventilation system.

A ventilation system that ventilates a room by a plurality of ventilation devices is known. Patent Document 1 discloses a ventilation system that controls the number of operating units of a plurality of ventilation devices so that the detected value of the CO2 sensor is lower than the reference value.

Japanese Unexamined Patent Publication No. 2018-119752

In recent years, there is an urgent need to take measures to prevent outbreaks caused by the new coronavirus and measures to prevent second-hand smoke. In particular, if the ventilator is used in a state where contaminated particles such as droplets of infected persons and smoke of smokers are generated indoors, the contaminated particles are diffused by the airflow generated by the ventilation device and away from the source. Contaminated particles may reach the occupants at the location. In order to prevent the diffusion of contaminated particles into the room, there is a need for a ventilation system that can be ventilated by a more appropriate air flow.

The present disclosure is intended to provide a ventilation system capable of ventilating with a more appropriate airflow.

(1) The ventilation system of the present disclosure includes a first ventilation device that ventilates a first area of an indoor space and a first ventilation device.
A second ventilator that ventilates the second area of the interior space,
A specific part that specifies an area that requires ventilation among the first area and the second area, and
Of the first ventilator and the second ventilator so that when the specific unit identifies the first area as an area requiring ventilation, an air flow from the second area to the first area is generated. It includes a control unit that controls at least one of them.

With this configuration, it is possible to suppress the generation of airflow from the area (first area) where ventilation is required due to the generation of contaminated particles to another area (second area), and other areas. Areas can be prevented from being contaminated by contaminants. As described above, according to the ventilation system according to the present disclosure, it is possible to ventilate with a more appropriate air flow.

(2) Preferably, the first ventilation device and the second ventilation device are first-class ventilation devices that supply and exhaust air to and from the first area and the second area by fans, respectively.
When the specific unit specifies the first area as an area requiring ventilation, the control unit reduces the air supply air volume of the first ventilation device to be relatively smaller than the air supply air volume of the second ventilation device. The first control and the second control for increasing the exhaust air volume of the first ventilation device to be relatively larger than the exhaust air volume of the second ventilation device are performed.

With this configuration, it is possible to generate an air flow from the second area to the first area. Therefore, it is possible to ventilate the room with a more appropriate air flow while forcibly supplying and exhausting air.

(3) Preferably, the first ventilation device includes a first air supply fan that supplies air in the outdoor space to the first area, and a first exhaust fan that discharges air in the first area to the outdoor space. Have,
The second ventilation device has a second air supply fan that supplies air in the outdoor space to the second area, and a second exhaust fan that discharges air in the second area to the outdoor space.
The first control includes a control that makes the rotation speed of the first air supply fan relatively smaller than the rotation speed of the second air supply fan.
The second control includes a control in which the rotation speed of the first exhaust fan is relatively higher than the rotation speed of the second exhaust fan.

With this configuration, the airflow from the second area to the first area can be adjusted by controlling the rotation speed of the fan.

(4) Preferably, the first ventilator and the second ventilator are type 3 ventilators that exhaust air to the first area and the second area by a fan, respectively.
When the specific unit specifies the first area as an area requiring ventilation, the control unit controls the exhaust air volume of the first ventilation device to be relatively larger than the exhaust air volume of the second ventilation device. conduct.

With this configuration, it is possible to generate an air flow from the second area to the first area. Therefore, it is possible to ventilate the room with a more appropriate air flow while forcibly exhausting the room.

It is a figure which shows schematic the structure of the ventilation system which concerns on 1st Embodiment of this disclosure. It is a schematic plan view which shows the ventilation system seen from the arrow II of FIG. It is a figure which shows schematic the control state of the ventilation system which concerns on 1st Embodiment of this disclosure. It is a figure which shows schematic the structure and the control state of the ventilation system which concerns on 2nd Embodiment of this disclosure. It is a figure which shows schematic the structure and the control state of the ventilation system which concerns on the modification of this disclosure.

Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[First Embodiment]
[Ventilation system configuration]
FIG. 1 is a diagram schematically showing a configuration of a ventilation system 1 according to the first embodiment of the present disclosure. The ventilation system 1 is a system that ventilates the indoor space S1. The ventilation system 1 includes a plurality of ventilation devices 11 and 21, a specific unit 30, a control unit 40, and a plurality of ducts 51, 52, 53, 54. The number of ventilation devices included in the ventilation system 1 is not limited as long as it is two or more. In this embodiment, a configuration in which two ventilation devices 11 and 21 are included in the ventilation system 1 will be described as an example. The ventilation devices 11 and 21 are provided, for example, behind the ceiling of the room forming the indoor space S1. Hereinafter, the ventilation device 11 is referred to as a "first ventilation device 11", and the ventilation device 21 is referred to as a "second ventilation device 21".

The first ventilation device 11 is a device that ventilates the first area A1 of the indoor space S1. The interior space S1 is, for example, a rectangular parallelepiped space that occupies the entire interior of one room. The first area A1 is a rectangular parallelepiped space that occupies a part of the indoor space S1. The first ventilation device 11 has a casing 12, a first air supply fan 13 and a first exhaust fan 14 incorporated in the casing 12, respectively, and a ventilation control unit 15. The casing 12 is formed with an air supply passage provided with the first air supply fan 13 and an exhaust passage provided with the first exhaust fan 14.

FIG. 2 is a plan view schematically showing the ventilation system 1 as seen from the arrow II of FIG. A plurality of ducts 51 and 52 are connected to the casing 12. One end of the duct 51 is connected to the air supply passage of the casing 12. The other end of the duct 51 is connected to the ceiling C1 located in the first area A1 in the room forming the interior space S1. An air supply port 51a is formed in a portion where the duct 51 is connected to the ceiling C1. One end of the duct 52 is connected to the exhaust passage of the casing 12. The other end of the duct 52 is connected to the ceiling C1. An exhaust port 52a is formed in a portion where the duct 52 is connected to the ceiling C1.

As shown in FIG. 2, when the indoor space S1 is viewed in a plan view, the air supply port 51a is formed in the vicinity of one corner of the first area A1, and the exhaust port 52a is in the vicinity of the corner located diagonally to the corner. Is formed in. By separating the positions where the air supply port 51a and the exhaust port 52a are formed in the first area A1 in this way, the air in the first area A1 can be ventilated more efficiently.

In addition to the ducts 51 and 52, a plurality of ducts (not shown) are connected to the casing 12. The plurality of ducts have a function of connecting the air supply passage and the exhaust passage of the casing 12 to the outdoor space S2, respectively. Through the plurality of ducts, the air in the outdoor space S2 can be taken into the air supply passage, and the air in the exhaust passage can be discharged to the outdoor space S2.

See FIG. The first air supply fan 13 is a fan that supplies the air in the outdoor space S2 to the first area A1. When the first air supply fan 13 rotates at a predetermined rotation speed, air having a predetermined air volume OA1 is taken into the air supply passage from the outdoor space S2, and the predetermined air supply air volume SA1 is taken into the first area A1 via the duct 51. Can be supplied at.

The first exhaust fan 14 is a fan that discharges the air in the first area A1 to the outdoor space S2. When the first exhaust fan 14 rotates at a predetermined rotation speed, the air of the predetermined exhaust air volume (return air volume) RA1 is taken into the exhaust passage from the first area A1 through the duct 52, and is predetermined to the outdoor space S2. The air with an air volume of EA1 can be exhausted.

The ventilation control unit 15 is composed of a CPU, a microcomputer having a memory, and the like. The ventilation control unit 15 is electrically connected to the first air supply fan 13, the first exhaust fan 14, and the control unit 40. The ventilation control unit 15 controls the rotation speed of the first air supply fan 13 and the rotation speed of the first exhaust fan 14 based on the operation command of the control unit 40.

The first ventilator 11 may further include a heat exchanger (not shown). In this case, the heat exchanger exchanges both sensible heat and latent heat (total heat exchange) between the air passing through the air supply passage and the air passing through the exhaust passage, so that the first ventilation device 11 to the first. The temperature and humidity of the air supplied to the 1 area A1 can be brought close to the temperature and humidity of the air discharged from the first area A1 to the first ventilation device 11. As a result, the first area A1 can be ventilated while suppressing fluctuations in the room temperature and humidity of the first area A1. The heat exchanger may be a sensible heat exchanger that exchanges only sensible heat. In this case, the first area A1 can be ventilated while suppressing the fluctuation of the room temperature of the first area A1.

The second ventilation device 21 is a device that ventilates the second area A2 of the indoor space S1. The second area A2 is an area different from the first area A1 in the indoor space S1, and is an area horizontally adjacent to the first area A1. In the present embodiment, the second area A2 is a rectangular parallelepiped range. 1 and 2 show a virtual surface VP1 that partitions the first area A1 and the second area A2. The virtual surface VP1 is a surface along the vertical direction.

The second ventilation device 21 includes a casing 22, a second air supply fan 23 and a second exhaust fan 24, respectively, which are built in the casing 22, and a ventilation control unit 25. Like the casing 12, the casing 22 is formed with an air supply passage and an exhaust passage.

See FIG. A plurality of ducts 53 and 54 are connected to the casing 22. One end of the duct 53 is connected to the air supply passage of the casing 22. The other end of the duct 53 is connected to the ceiling C2 located in the second area A2 in the room forming the interior space S1. An air supply port 53a is formed at a portion where the duct 53 is connected to the ceiling C2. One end of the duct 54 is connected to the exhaust passage of the casing 22. The other end of the duct 54 is connected to the ceiling C2. An exhaust port 54a is formed in a portion where the duct 54 is connected to the ceiling C2.

The air supply port 53a and the exhaust port 54a are formed in the vicinity of the diagonally located corners of the second area A2, respectively. By separating the positions where the air supply port 53a and the exhaust port 54a are formed in the second area A2, the air in the second area A2 can be ventilated more efficiently.

In addition to the ducts 53 and 54, a plurality of ducts (not shown) are connected to the casing 22. The plurality of ducts have a function of connecting the air supply passage and the exhaust passage of the casing 22 to the outdoor space S2, respectively. Through the plurality of ducts, the air in the outdoor space S2 can be taken into the air supply passage, and the air in the exhaust passage can be discharged to the outdoor space S2.

See FIG. The second air supply fan 23 is a fan that supplies the air in the outdoor space S2 to the second area A2. When the second air supply fan 23 rotates at a predetermined rotation speed, air having a predetermined air volume OA2 is taken into the air supply passage from the outdoor space S2, and the predetermined air supply air volume SA2 is taken into the second area A2 via the duct 53. Can be supplied at.

The second exhaust fan 24 is a fan that discharges the air in the second area A2 to the outdoor space S2. When the second exhaust fan 24 rotates at a predetermined rotation speed, the air of the predetermined exhaust air volume (return air volume) RA2 is taken into the exhaust passage from the second area A2 through the duct 54, and is predetermined to the outdoor space S2. The air with an air volume of EA2 can be exhausted.

The ventilation control unit 25 includes a CPU, a microcomputer having a memory, and the like. The ventilation control unit 25 is electrically connected to the second air supply fan 23, the second exhaust fan 24, and the control unit 40. The ventilation control unit 25 controls the rotation speed of the second air supply fan 23 and the rotation speed of the second exhaust fan 24 based on the operation command of the control unit 40.

The second ventilator 21 may further include a heat exchanger (not shown). In this case, the heat exchanger exchanges both sensible heat and latent heat (total heat exchange) between the air passing through the air supply passage and the air passing through the exhaust passage, so that the second ventilation device 21 to the second. The temperature and humidity of the air supplied to the two areas A2 can be brought close to the temperature and humidity of the air discharged from the second area A2 to the second ventilation device 21. As a result, the second area A2 can be ventilated while suppressing fluctuations in the room temperature and humidity of the second area A2. The heat exchanger may be a sensible heat exchanger that exchanges only sensible heat. In this case, the second area A2 can be ventilated while suppressing the fluctuation of the room temperature of the second area A2.

The specific portion 30 is a portion of the first area A1 and the second area A2 that specifies an area requiring ventilation. The specific unit 30 has a sensor 31 and a main body unit 32. The sensor 31 is a sensor that detects the state of the interior space S1, and is, for example, an infrared sensor that detects the temperature. The sensor 31 is electrically connected to the main body 32 and outputs a detection signal to the main body 32. The sensor 31 is installed in at least one of the first area A1 and the second area A2.

The main body 32 is an arithmetic unit (for example, a microcomputer including a processor and a memory) that identifies an area requiring ventilation based on the detection signal of the sensor 31. For example, when the main body 32 obtains information that the temperature of a part of the first area A1 is equal to or higher than a predetermined temperature by calculating and analyzing the detection signal of the sensor 31, the first area A1 is set. It is determined that a person with heat generation above a predetermined temperature is present in the room, and the first area A1 is specified as an area requiring ventilation. The main body unit 32 is electrically connected to the control unit 40 and outputs a specific result to the control unit 40.

In the specific portion 30 of the present embodiment, the sensor 31 and the main body portion 32 are built in the same casing. However, the positions of the sensor 31 and the main body 32 may be separated from each other. For example, the sensor 31 may be independently provided in the first area A1 or the second area A2, and the main body 32 may be provided in the same casing as the control unit 40.

As shown in FIG. 1, when the sensor 31 is installed in only one of the first area A1 and the second area A2, the sensor 31 detects the states of both the first area A1 and the second area A2. When one sensor 31 is installed in both the first area A1 and the second area A2 (or more), the sensor 31 installed in the first area A1 detects the state of the first area A1. , The sensor 31 installed in the second area A2 may be configured to detect the state of the second area A2, or each sensor 31 detects the state of both the first area A1 and the second area A2, respectively. It may be configured to do so.

The control unit 40 is a microcomputer including a processor such as a CPU and a memory such as RAM and ROM. The control unit 40 is electrically connected to the specific unit 30, the ventilation control unit 15, and the ventilation control unit 25. The control unit 40 outputs an operation command to the ventilation control unit 15 and the ventilation control unit 25 according to the specific result of the specific unit 30. Therefore, the control unit 40 has a function as a central control unit for controlling the first ventilation device 11 and the second ventilation device 21 in conjunction with each other.

The control unit 40 is connected to a remote controller (hereinafter, referred to as “remote controller”) (hereinafter referred to as “remote controller”), which is not shown, by wire or wirelessly. The control unit 40 has a "air flow adjustment mode" in which each unit is controlled based on the specific result of the specific unit 30 by operating a remote controller, and a "normal mode" in which each unit is controlled without being based on the specific result of the specific unit 30. And, the operating state can be switched.

[Operation of ventilation system]
FIG. 3 is a diagram schematically showing an example of a control state of the ventilation system 1 according to the first embodiment. In this example, three occupant OPs are present in the indoor space S1, of which one occupant OP is in the first area A1 and the other two occupant OPs are second. It is located in area A2. The occupant OP in the first area A1 has a fever of 37.5 degrees Celsius or higher. Therefore, the occupant OP in the first area A1 is the subject TP1 suspected of having an infectious disease. Since there is a possibility that droplets (contaminated particles) containing an infection source such as a virus may be emitted from the subject TP1, the areas requiring more ventilation among the first area A1 and the second area A2 are the first area A1. Become.

First, the user operates the remote controller to instruct the control unit 40 to operate in the "air flow adjustment mode". As a result, the specifying unit 30 starts the operation of specifying the area requiring ventilation among the first area A1 and the second area A2.

Specifically, the sensor 31 detects the body temperature of a plurality of occupants OP in the first area A1 and the second area A2 at predetermined time intervals (for example, every 10 minutes), and outputs the detection signal to the main body 32. do. Then, when the main body 32 determines that the body temperature of the subject TP1 located in the first area A1 among the plurality of occupant OPs is equal to or higher than a predetermined value (for example, 37.5 degrees Celsius), the first area A1 is determined. It is specified as an area that requires ventilation, and the specified result is output to the control unit 40.

When the specific result is input from the specific unit 30 to the control unit 40, the control unit 40 issues an operation command to the ventilation control units 15 and 25. As a result, the control unit 40 controls the first ventilation device 11 and the second ventilation device 21 so as to generate an air flow F1 from the second area A2 to the first area A1. More specifically, the control unit 40 has a first control (SA1 <SA2) that makes the air supply air volume SA1 of the first ventilation device 11 relatively smaller than the air supply air volume SA2 of the second ventilation device 21. 1 The second control (RA1> RA2) in which the exhaust air volume RA1 of the ventilation device 11 is relatively larger than the exhaust air volume RA2 of the second ventilation device 21 is performed.

Due to the first control and the second control, the air pressure in the second area A2 is higher than the air pressure in the first area A1. As a result, the airflow F1 from the second area A2 to the first area A1 can be generated. The airflow F1 can suppress the generation of an airflow from the first area A1 to the second area A2, and can prevent the second area A2 from being contaminated by the contaminated particles generated in the first area A1. .. Further, by the first control and the second control, the air flow F1 can be generated while forcibly supplying and exhausting the indoor space S1. As described above, according to the ventilation system 1 according to the present embodiment, it is possible to ventilate with a more appropriate air flow.

When the first ventilation device 11 and the second ventilation device 21 have the same configuration, if the rotation speeds of the first air supply fan 13 and the second air supply fan 23 are equal, the supply air volume SA1 and the supply air volume SA2 are equal. Become. In this case, the first control includes a control in which the rotation speed of the first air supply fan 13 is relatively lower than the rotation speed of the second air supply fan 23. In the first control, at least one of a control for reducing the rotation speed of the first air supply fan 13 and a control for increasing the rotation speed of the second air supply fan 23 is performed by the operation command of the control unit 40. Will be.

Further, when the first ventilation device 11 and the second ventilation device 21 have the same configuration, if the rotation speeds of the first exhaust fan 14 and the second exhaust fan 24 are equal, the exhaust air volume RA1 and the exhaust air volume RA2 are equal. In this case, the second control includes a control in which the rotation speed of the first exhaust fan 14 is relatively higher than the rotation speed of the second exhaust fan 24. In the second control, at least one of a control for increasing the rotation speed of the first exhaust fan 14 and a control for decreasing the rotation speed of the second exhaust fan 24 is performed by the operation command of the control unit 40.

According to the ventilation system 1 according to the present embodiment, the rotation speed of at least one of the first air supply fan 13 and the second air supply fan 23 and the rotation speed of at least one of the first exhaust fan 14 and the second exhaust fan 24. By controlling and, the airflow from the second area A2 to the first area A1 can be adjusted.

When performing the first control and the second control, the control unit 40 sets the difference (RA1-SA1) between the exhaust air volume RA1 of the first ventilation device 11 and the supply air volume SA1 (RA1-SA1) to the supply air volume SA2 of the second ventilation device 21. Third control may be further performed so as to be equal to the difference between the air volume RA2 and the exhaust air volume RA2 (SA2-RA2). By the third control, the decrease in air pressure in the first area A1 and the increase in air pressure in the second area A2 become equal. As a result, it is possible to suppress the fluctuation of the overall air pressure in the indoor space S1 while fluctuating the air pressure in each area to generate the desired air flow F1.

[Second Embodiment]
FIG. 4 is a diagram schematically showing a configuration and a control state of the ventilation system 1a according to the second embodiment of the present disclosure. In the second embodiment, the same configurations as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted as appropriate.

The ventilation system 1a is a system for ventilating the indoor space S1. The ventilation system 1a includes a plurality of ventilation devices 11a and 21a, a specific unit 30, a control unit 40, and a plurality of ducts 52 and 54. The number of ventilation devices included in the ventilation system 1a is not limited as long as it is two or more. In this embodiment, a configuration in which two ventilation devices 11a and 21a are included in the ventilation system 1a will be described as an example. Hereinafter, the ventilation device 11a is referred to as a "first ventilation device 11a", and the ventilation device 21a is referred to as a "second ventilation device 21a".

The first ventilation device 11 and the second ventilation device 21 according to the first embodiment are the first-class ventilation devices that perform both forced air supply and exhaust of the indoor space S1 by a fan, respectively. On the other hand, in the first ventilation device 11a and the second ventilation device 21a according to the present embodiment, the third ventilation device 11a and the second ventilation device 21a each perform forced exhaust of the indoor space S1 by a fan, and supply air naturally without depending on the fan. It is a seed ventilation device.

The first ventilation device 11a is a device that ventilates the first area A1 of the indoor space S1. The first ventilation device 11a has a casing 12a, a first exhaust fan 14 built in the casing 12a, and a ventilation control unit 15a. An exhaust passage is formed in the casing 12a, and a first exhaust fan 14 is provided in the exhaust passage. The exhaust passage of the casing 12a is connected to the ceiling C1 via the duct 52.

The ventilation control unit 15a is electrically connected to the first exhaust fan 14 and the control unit 40. The ventilation control unit 15a controls the rotation speed of the first exhaust fan 14 based on the operation command of the control unit 40.

The second ventilation device 21a is a device that ventilates the second area A2 of the indoor space S1. The second ventilation device 21a has a casing 22a, a second exhaust fan 24 built in the casing 22a, and a ventilation control unit 25a. Like the casing 12a, the casing 22a is formed with an exhaust passage. The exhaust passage of the casing 22a is connected to the ceiling C2 via the duct 54.

The ventilation control unit 25a is electrically connected to the second exhaust fan 24 and the control unit 40. The ventilation control unit 25a controls the rotation speed of the second exhaust fan 24 based on the operation command of the control unit 40.

An air supply port 61 is formed in the first area A1. The air supply port 61 is an opening or a pipe communicating the first area A1 and the outdoor space S2, and is, for example, a window or a duct. When the air pressure in the first area A1 becomes lower than that in the outdoor space S2 due to the exhaust of the air in the first area A1 by the first ventilation device 11a, a predetermined supply air flow rate from the outdoor space S2 through the air supply port 61. The air of SA1 is naturally supplied to the first area A1.

An air supply port 62 is formed in the second area A2. The air supply port 62 is an opening or a pipe communicating the second area A2 and the outdoor space S2, and is, for example, a window or a duct. When the air pressure in the second area A2 becomes lower than that in the outdoor space S2 due to the second ventilation device 21a exhausting the air in the second area A2, the predetermined air supply flow rate from the outdoor space S2 through the air supply port 62. The air of SA2 is naturally supplied to the second area A2. Here, the maximum amount of the supply air flow rates SA1 and SA2 is determined by the sizes of the air supply ports 61 and 62 and the like.

The control unit 40 is electrically connected to the specific unit 30, the ventilation control unit 15a, and the ventilation control unit 25a. The control unit 40 outputs an operation command to the ventilation control unit 15a and the ventilation control unit 25a according to the specific result input from the specific unit 30. Therefore, the control unit 40 has a function as a central control unit for controlling the first ventilation device 11a and the second ventilation device 21a in conjunction with each other.

In the example of FIG. 4, four occupant OPs are located in the first area A1, and one occupant OP is located in the second area A2. Therefore, since the first area A1 is more crowded than the second area A2, the area requiring more ventilation is the first area A1.

The sensor 31 according to this embodiment is, for example, a motion sensor. The sensor 31 detects the number of occupants OP in each of the first area A1 and the second area A2 at predetermined time intervals (for example, every 10 minutes), and outputs the detection signal to the main body unit 32. Then, when the main body unit 32 determines that the number of occupant OPs located in any of the first area A1 and the second area A2 is a predetermined value (for example, four people) or more, the area (FIG. In the case of 4, the first area A1) is specified as an area requiring ventilation, and the specified result is output to the control unit 40.

The control unit 40 issues an operation command to the ventilation control units 15a and 25a based on the specific result of the specific unit 30. As a result, the control unit 40 controls the first ventilation device 11a and the second ventilation device 21a so as to generate an air flow F1 from the second area A2 to the first area A1. More specifically, the control unit 40 performs a fourth control (RA1> RA2) in which the exhaust air volume RA1 of the first ventilation device 11a is relatively larger than the exhaust air volume RA2 of the second ventilation device 21a. The fourth control may include a control (RA1> SA1) in which the exhaust air volume RA1 is larger than the maximum air supply air volume SA1 naturally supplied through the air supply port 61.

Due to the fourth control, the air pressure in the second area A2 is higher than the air pressure in the first area A1. As a result, the airflow F1 from the second area A2 to the first area A1 can be generated. The air flow F1 can suppress the generation of an air flow from the first area A1 to the second area A2. Further, by the fourth control, the air flow F1 can be generated while forcibly exhausting the indoor space S1. As described above, according to the ventilation system 1a according to the present embodiment, it is possible to ventilate with a more appropriate air flow.

[Modification example]
The present disclosure is not limited to the above-mentioned first embodiment and the second embodiment, and various modifications can be made.

[Deformation example of casing]
In the first ventilation device 11 according to the first embodiment described above, the first air supply fan 13 and the first exhaust fan 14 are built in one casing 12. However, the first ventilation device 11 has two casings provided separately from each other, the first air supply fan 13 is built in one casing, and the first exhaust fan 14 is built in the other casing. It may have been done. The second ventilation device 21 may also have a second air supply fan 23 built in one of the two casings and a second exhaust fan 24 in the other.

[Modification example of air volume adjustment]
In the first embodiment described above, the air supply air volume SA1 is adjusted by controlling the rotation speed of the first air supply fan 13 by the control unit 40. However, for example, when a damper is provided in the duct 51, the supply air volume SA1 may be adjusted by controlling the opening degree of the damper instead of the rotation speed of the first supply air fan 13. Similarly, the exhaust air volume RA1, the supply air volume SA2, and the exhaust air volume RA2 may be adjusted by controlling the opening degree of the dampers provided in the ducts 52 to 54.

FIG. 5 is a diagram schematically showing the configuration and control state of the ventilation system according to the modified example. This modification is different from the first embodiment in that dampers 71 to 74 are provided in the ducts 51 to 54, respectively. The opening degree of the dampers 71 and 72 is controlled by the ventilation control unit 15. The opening degree of the dampers 73 and 74 is controlled by the ventilation control unit 25.

When the specific unit 30 identifies the first area A1 as an area requiring ventilation and outputs the detection result to the control unit 40, the control unit 40 issues an operation command to the ventilation control units 15 and 25 based on the detection result. Specifically, the control unit 40 makes the opening degree of the damper 71 relatively smaller than the opening degree of the damper 73, so that the supply air amount SA1 is relatively smaller than the supply air amount SA2. (SA1 <SA2) is performed. Further, the control unit 40 makes the opening degree of the damper 72 relatively larger than the opening degree of the damper 74, so that the exhaust air volume RA1 is relatively larger than the exhaust air volume RA2 (RA1> RA2). I do. By the first control and the second control, the airflow F1 from the second area A2 to the first area A1 can be generated.

The opening degree of the dampers 71 to 74 is adjusted by adjusting the blade angles of the dampers 71 to 74 with respect to the ducts 51 to 54. In the example of FIG. 5, by minimizing the opening degree of the dampers 71 and 74, the supply air volume SA1 and the exhaust air volume RA2 are minimized (for example, 0), and the opening degree of the dampers 72 and 73 is maximized. , Exhaust air volume RA1 and supply air volume SA2 are maximized.

The control unit 40 controls both the rotation speeds of the first air supply fan 13, the first exhaust fan 14, the second air supply fan 23, and the second exhaust fan 24, and the opening degrees of the dampers 71 to 74. You may.

[Modification example of specific part]
The sensor 31 is not limited to a sensor that detects temperature or a motion sensor as long as it has a function of detecting the states of the first area A1 and the second area A2. For example, the sensor 31 may be a sensor that detects a virus or a sensor that detects a CO2 concentration. When the sensor 31 is a CO2 concentration sensor, the main body 32 sets an area of the first area A1 and the second area A2 where the CO2 concentration is higher than a predetermined value (an area where people are crowded) as an area requiring ventilation. Identify.

Contaminated particles include droplets containing the source of infection, cigarette smoke, and particles containing an unpleasant odor. Areas that require ventilation include areas where the source of infection is located, as well as areas where cigarette smoke and odor particles are generated. Therefore, the sensor 31 may be a sensor that detects smoke such as cigarettes, or may be a sensor that detects an odor.

Instead of the sensor 31, the specific unit 30 may have a communication unit that receives information about the subject TP1 suspected of having an infectious disease from a server or the like (not shown). In this case, the specifying unit 30 identifies the area where the subject TP1 is present as an area requiring ventilation based on the information received by the communication unit. Examples of the subject TP1 include a positive patient for an infectious disease and a contact person with the positive patient.

The main body 32 may be the same microcomputer as the control 40. In this case, the microcomputer has both a function as a control unit 40 and a function as a main body unit 32.

[Modification example of control unit]
In the first embodiment described above, the control unit 40 controls the first ventilation device 11 and the second ventilation device 21 via the ventilation control units 15 and 25. On the other hand, the control unit 40 may be configured to directly control the first ventilation device 11 and the second ventilation device 21. In this case, the ventilation system 1 does not have to have the ventilation control units 15 and 25.

Further, the ventilation system 1 may be configured to have no control unit 40 and to control the ventilation control units 15 and 25 in cooperation with each other by communicating with each other. In this case, the ventilation control units 15 and 25 function as the "control unit" of the present disclosure. Further, in this case, the specific unit 30 is electrically connected to at least one of the ventilation control units 15 and 25, and outputs a specific result to the at least one of them.

[Other variants]
At least a part of each of the above embodiments and modifications may be arbitrarily combined with each other.

[Action and effect of the embodiment]
(1) In the ventilation systems 1, 1a of the above embodiment, the first ventilation devices 11 and 11a for ventilating the first area A1 of the indoor space S1 and the second ventilation device 21 for ventilating the second area A2 of the indoor space S1. , 21a, the specific unit 30 that specifies the area requiring ventilation among the first area A1 and the second area A2, and the second area when the specific unit 30 specifies the first area A1 as an area that requires ventilation. A control unit 40 that controls at least one of the first ventilation devices 11 and 11a and the second ventilation devices 21 and 21a is provided so as to generate an air flow F1 from A2 to the first area A1.

With such a configuration, it is possible to suppress the generation of airflow from the area (first area A1) where ventilation is required due to the generation of contaminated particles to another area (second area A2). It is possible to prevent other areas from being contaminated by pollutants. As described above, according to the ventilation systems 1, 1a according to the above-described embodiment, it is possible to ventilate with a more appropriate air flow.

(2) In the above first embodiment, the first ventilation device 11 and the second ventilation device 21 supply and exhaust air to the first area A1 and the second area A2 by fans 13, 14, 23, and 24, respectively. It is a first-class ventilation device that performs the above. Further, in the above-mentioned first embodiment, when the specific unit 30 specifies the first area A1 as an area requiring ventilation, the control unit 40 performs the first control and the second control. The first control is a control in which the air supply air volume SA1 of the first ventilation device 11 is relatively smaller than the air supply air volume SA2 of the second ventilation device 21, and the second control is the exhaust air volume of the first ventilation device 11. This is a control in which RA1 is relatively larger than the exhaust air volume RA2 of the second ventilation device 21.

With this configuration, it is possible to generate an air flow F1 from the second area A2 to the first area A1. Therefore, the interior space S1 can be forcibly supplied and exhausted while being ventilated by a more appropriate air flow.

(3) In the above first embodiment, the first ventilation device 11 supplies the air of the outdoor space S2 to the first air supply fan 13 to the first area A1 and the air of the first area A1 to the outdoor space S2. It has a first exhaust fan 14 for discharging. Further, in the first embodiment described above, the second ventilation device 21 discharges the air in the outdoor space S2 to the outdoor space S2 and the second air supply fan 23 for supplying the air in the outdoor space S2 to the second area A2. It has a second exhaust fan 24 and the like. The first control includes a control that makes the rotation speed of the first air supply fan 13 relatively smaller than the rotation speed of the second air supply fan 23, and the second control is the rotation speed of the first exhaust fan 14. Includes control to increase the number of revolutions of the second exhaust fan 24 relative to the number of revolutions.

With this configuration, the airflow F1 from the second area A2 to the first area A1 can be adjusted by controlling the rotation speed of the fan.

(4) In the above-mentioned second embodiment, the first ventilation device 11a and the second ventilation device 21a exhaust the first area A1 and the second area A2 by the fans 14a and 24a, respectively. Is. Further, in the second embodiment described above, when the specifying unit 30 specifies the first area A1 as an area requiring ventilation, the control unit 40 uses the exhaust air volume RA1 of the first ventilation device 11a as the exhaust of the second ventilation device 21a. Control is performed so that the air volume is relatively larger than RA2.

With this configuration, it is possible to generate an air flow F1 from the second area A2 to the first area A1. Therefore, the interior space S1 can be forcibly exhausted and ventilated by a more appropriate air flow.

[Supplement]
Although the embodiments have been described above, it will be understood that various modifications of the embodiments and details are possible without departing from the spirit and scope of the claims.

1: Ventilation system, 1a: Ventilation system, 11: First ventilation device, 11a: First ventilation device, 12: Casing, 12a: Casing, 22: Casing, 22a: Casing, 13: First air supply fan, 14: 1st exhaust fan, 14a: 1st exhaust fan, 15: ventilation control unit, 15a: ventilation control unit, 21: second ventilation device, 21a: second ventilation device, 23: second air supply fan, 24: second Exhaust fan, 24a: 2nd exhaust fan, 25: Ventilation control unit, 25a: Ventilation control unit, 30: Specific unit, 31: Sensor, 32: Main unit, 40: Control unit, 51: Duct, 52: Duct, 53 : Duct, 54: Duct, 71: Damper, 72: Damper, 73: Damper, 74: Damper, S1: Indoor space, S2: Outdoor space, A1: 1st area, A2: 2nd area, F1: Airflow, SA1 : Supply air volume, SA2: Supply air volume, RA1: Exhaust air volume, RA2: Exhaust air volume

Claims (4)

The first ventilation device (11, 11a) that ventilates the first area (A1) of the indoor space (S1), and
A second ventilation device (21, 21a) that ventilates the second area (A2) of the indoor space (S1), and
A specific portion (30) that specifies an area requiring ventilation among the first area (A1) and the second area (A2), and
When the specific portion (30) specifies the first area (A1) as an area requiring ventilation, an air flow (F1) from the second area (A2) to the first area (A1) is generated. In addition, a control unit (40) that controls at least one of the first ventilation device (11, 11a) and the second ventilation device (21, 21a).
Ventilation system (1,1a). The first ventilation device (11) and the second ventilation device (21) are supplied to the first area (A1) and the second area (A2) by fans (13, 14, 23, 24), respectively. It is a first-class ventilation device that ventilates air and exhaust.
When the specific unit (30) specifies the first area (A1) as an area requiring ventilation, the control unit (40) determines the air supply air volume (SA1) of the first ventilation device (11). The first control that makes the supply air volume (SA2) of the second ventilation device (21) relatively smaller, and the exhaust air volume (RA1) of the first ventilation device (11) is the exhaust of the second ventilation device (21). The second control is performed so that the air volume (RA2) is relatively larger than the air volume (RA2).
The ventilation system (1) according to claim 1. The first ventilation device (11) has a first air supply fan (13) that supplies air in the outdoor space (S2) to the first area (A1), and air in the first area (A1) in the outdoor space. It has a first exhaust fan (14) that discharges to (S2), and has.
The second ventilation device (21) has a second air supply fan (23) that supplies air in the outdoor space (S2) to the second area (A2), and air in the second area (A2) in the outdoor space. It has a second exhaust fan (24) that discharges to (S2), and has.
The first control includes a control that makes the rotation speed of the first air supply fan (13) relatively lower than the rotation speed of the second air supply fan (23).
The second control includes a control in which the rotation speed of the first exhaust fan (14) is relatively higher than the rotation speed of the second exhaust fan (24).
The ventilation system (1) according to claim 2. The first ventilation device (11a) and the second ventilation device (21a) exhaust the first area (A1) and the second area (A2) by fans (14a, 24a), respectively. It is a seed ventilation device,
When the specific unit (30) specifies the first area (A1) as an area requiring ventilation, the control unit (40) determines the exhaust air volume (RA1) of the first ventilation device (11a). 2 Control is performed so that the amount is relatively larger than the exhaust air volume (RA2) of the ventilation device (21a).
The ventilation system (1a) according to claim 1.

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