WO2022091438A1

WO2022091438A1 - Airflow formation system, and manufacturing method for airflow formation system

Info

Publication number: WO2022091438A1
Application number: PCT/JP2021/004952
Authority: WO
Inventors: 和宏谷口; 昌史村上
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2020-10-30
Filing date: 2021-02-10
Publication date: 2022-05-05
Also published as: JP7507387B2; JP2024071533A; JPWO2022091438A1

Abstract

An airflow formation system (100) comprising an air conditioning system (1) and a return mechanism (2). The air conditioning system (1) supplies air to a target space (4) from an upper space (44) above the ceiling (41) of the target space (4) and discharges air from the target space (4) to the upper space (44). The return mechanism (2) takes in air in the target space (4) from a position closer to the floor (42) than the ceiling (41) in the target space (4) and forms a return path (20) that returns the intake air to the upper space (44).

Description

Airflow formation system and manufacturing method of airflow formation system

The present invention relates to an airflow forming system and a method for manufacturing the airflow forming system.

Patent Document 1 discloses a ventilation system in which a plurality of ventilation devices are installed in one target space and each ventilation device is equipped with a carbon dioxide sensor.

Japanese Unexamined Patent Publication No. 2018-119752

The present invention provides an airflow forming system or the like that easily reduces the risk of infection with an infectious disease in a target space.

The airflow forming system according to one aspect of the present invention includes an air conditioning system and a reflux mechanism. The air conditioning system supplies air from the space above the ceiling in the target space to the target space, and exhausts the air from the target space to the upper space. The recirculation mechanism forms a recirculation path in which the air in the target space is sucked in from a position closer to the floor than the ceiling in the target space, and the sucked air is returned to the upper space.

The airflow forming system according to one aspect of the present invention includes an air conditioning system and a reflux mechanism. The air conditioning system supplies air from the space above the ceiling in the target space to the target space, and exhausts the air from the target space to the upper space. The recirculation mechanism forms a recirculation path that sucks air in the target space from the floor in the target space and recirculates the sucked air to the space below the ceiling below the floor. The reflux mechanism includes an opening that introduces the air from the target space into the space below the floor and introduces the air from the space below the space below the ceiling.

In the method for manufacturing an airflow forming system according to one aspect of the present invention, a reflux mechanism is installed in the target space in which the air conditioning system is correspondingly installed. The air conditioning system supplies air from the space above the ceiling in the target space to the target space, and exhausts the air from the target space to the upper space. The recirculation mechanism forms a recirculation path in which the air in the target space is sucked in from a position closer to the floor than the ceiling in the target space, and the sucked air is returned to the upper space.

In the method for manufacturing an airflow forming system according to one aspect of the present invention, an air conditioning system is installed corresponding to the target space, and a reflux mechanism is installed. The air conditioning system supplies air from the space above the ceiling in the target space to the target space, and exhausts the air from the target space to the upper space. The recirculation mechanism forms a recirculation path in which the air in the target space is sucked in from a position closer to the floor than the ceiling in the target space, and the sucked air is returned to the upper space.

The airflow formation system or the like according to one aspect of the present invention has an advantage that the risk of infection with an infectious disease in the target space can be easily reduced.

FIG. 1 is a diagram showing a first configuration example of the airflow forming system according to the first embodiment. FIG. 2 is a diagram showing an example of a return path of the airflow formation system according to the first embodiment. FIG. 3 is a diagram showing a second configuration example of the airflow forming system according to the first embodiment. FIG. 4 is a diagram showing a third configuration example of the airflow forming system according to the first embodiment. FIG. 5 is a block diagram showing a functional configuration of a first control example of the airflow forming system according to the first embodiment. FIG. 6 is a block diagram showing a functional configuration of a second control example of the airflow forming system according to the first embodiment. FIG. 7A is an explanatory diagram of the airflow formed by the airflow formation system of the comparative example. FIG. 7B is an explanatory diagram of the airflow formed by the airflow forming system according to the first embodiment. FIG. 8 is a diagram showing a configuration example of the airflow forming system according to the second embodiment.

Hereinafter, embodiments will be specifically described with reference to the drawings. It should be noted that all of the embodiments described below show comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection forms of the components, steps, the order of steps, etc. shown in the following embodiments are examples, and are not intended to limit the present invention. Further, among the components in the following embodiments, the components not described in the independent claims are described as arbitrary components.

Note that each figure is a schematic diagram and is not necessarily exactly illustrated. Further, in each figure, the same reference numerals may be given to substantially the same configurations, and duplicate explanations may be omitted or simplified.

(Embodiment 1)
[Constitution]
First, the configuration of the airflow forming system 100 according to the first embodiment will be described. FIG. 1 is a diagram showing a first configuration example of the airflow forming system 100 according to the first embodiment. As shown in FIG. 1, the airflow forming system 100 is a system that forms an airflow in the target space 4. The target space 4 is a room in a facility such as an office building. The target space 4 is not limited to one large room, but may be a plurality of rooms partitioned by a wall or the like. The facility is not limited to an office building, but may be another facility. In the example shown in FIG. 1, the target space 4 includes a plurality of (here, two) spaces (first interior space 4a and second interior space 4b). In the example shown in FIG. 1, a wall is not provided at the boundary between the first interior space 4a and the second interior space 4b (see the alternate long and short dash line in FIG. 1), but a wall may be provided. Further, the target space 4 may be one space without including a plurality of spaces.

The arrow A1 shown in FIG. 1 represents the flow of air, and the same applies to the other figures. The airflow forming system 100 forms an airflow (downflow) from the upper side to the lower side in the target space 4 (here, each of the first indoor space 4a and the second indoor space 4b). For example, if a downflow is formed in an office where the density of people fluctuates greatly, fine particles (aerosol) suspended in the air are blown down to the floor 42 side. If fine particles with infectious substances (viruses, etc.) are floating in the air, there is a concern that the infectious disease will spread unless some measures are taken. On the other hand, in the airflow forming system 100 according to the first embodiment, since the fine particles are blown down to the floor 42 side by the downflow, the effect of suppressing the spread of infectious diseases caused by the fine particles floating in the air is expected. can.

The air flow forming system 100 includes an air conditioning system 1 and a reflux mechanism 2. Further, the airflow forming system 100 further includes a controller 3 for controlling the airflow. The controller 3 will be described in detail in [Controller] described later.

The air conditioning system 1 supplies air from the space 44 above the ceiling 41 in the target space 4 to the target space 4, and exhausts air from the target space 4 to the space 44 above. Specifically, the air conditioning system 1 supplies air from the upper space 44 to the target space 4 through the air supply port 46 provided in the ceiling 41. Further, the air conditioning system 1 exhausts air from the target space 4 to the upper space 44 through the exhaust port 47 provided in the ceiling 41. In the example shown in FIG. 1, the first air supply port 46a and the first exhaust port 47a are provided in the first interior space 4a one by one, but each of them may be plural. Further, although the second air supply port 46b and the second exhaust port 47b are provided in the second interior space 4b one by one, a plurality of each may be provided. The air conditioning system 1 includes an AHU (Air Handling Unit) 11 and a return blower 12.

The AHU 11 takes in a part of the return air from the target space 4 and the outside air, cools or heats the taken in air, and then supplies the air to the target space 4. Specifically, the AHU 11 supplies air to the space 44 above the ceiling 41 of the target space 4. The AHU 11 includes an air filter 111, an air conditioner 112, a humidifier 113, and a blower 114. The air filter 111 is, for example, a HEPA (High Efficiency Particulate Air) filter, and removes foreign substances such as dust from the passing air. The cooling / heating device 112 has, for example, a steam coil for heating and a chilled water coil for cooling, and by passing air through the installation location of these coils, cold air or warm air is generated. The humidifier 113 humidifies the air that has passed through the air conditioner 112 as needed. The blower 114 takes in the cold air or warm air that has passed through the humidifier 113, and supplies the taken-in cold air or warm air to the space 44 above the ceiling 41 of the target space 4 via the air supply duct 5.

The return air blower 12 takes in the air exhausted from the space 44 above the ceiling 41 of the target space 4, supplies a part of the taken in air to the AHU 11 through the return air duct 6, and supplies the remaining air to the facility. Exhaust to the outside.

The recirculation mechanism 2 recirculates the air supplied from the air conditioning system 1 to the target space 4 to the space 44 above the ceiling 41 of the target space 4, thereby forming an air flow from above to downward in the target space 4. It is a mechanism to do. That is, the reflux mechanism 2 forms a reflux path 20 in which the air in the target space 4 is sucked in from a position closer to the floor 42 than the ceiling 41 in the target space 4, and the sucked air is returned to the upper space 44.

FIG. 2 is a diagram showing an example of the return path 20 of the airflow formation system 100 according to the first embodiment. In the example shown in FIG. 2, the reflux path 20 has a configuration in which the first configuration example and the second configuration example described later are combined, and the lower end portion of the duct 23 is connected to the lower space 43 of the floor 42. As shown in FIG. 2, in the first embodiment, the return path 20 is realized by the duct 23 installed in the target space 4. The duct 23 has, for example, a long square cylinder in the vertical direction, and is attached to the ceiling 41 of the target space 4 so that the upper end thereof is connected to the upper space 44. Therefore, it is possible to introduce the air taken in from the target space 4 into the upper space 44 through the inside of the duct 23. It is preferable that the duct 23 is installed so as to be covered with the wall material 23a in the corner of the target space 4 (for example, in the vicinity of the pillar in the corner of the room) so as to be inconspicuous to the person staying in the target space 4.

The following is a list of specific configuration examples of the airflow formation system 100. Regardless of which of the first configuration example to the third configuration example shown below is adopted, the airflow forming system 100 can form an airflow from the upper side to the lower side in the target space 4.

FIG. 1 is a diagram showing a first configuration example of the airflow forming system 100 according to the first embodiment. In the first configuration example, as shown in FIG. 1, the reflux mechanism 2 includes a first opening 21 and a fan 24. The first opening 21 is provided at a position closer to the floor 42 than the ceiling 41, and introduces air from the target space 4 into the return path 20. Specifically, the first opening 21 is provided at the lower end of the duct 23 corresponding to the return path 20, and connects the target space 4 and the inside of the duct 23. The fan 24 sucks air toward the upper space 44 via the reflux path 20. Specifically, the fan 24 is installed inside the duct 23, and air is sucked from the target space 4 through the first opening 21, and the sucked air is taken into the target space 4 through the inside of the duct 23. It is supplied to the space 44 above the ceiling 41.

In the first configuration example, the air supplied from the air conditioning system 1 to the target space 4 is the air supply port 46, the area along the floor 42, the first opening 21, the inside of the duct 23, and the upper space 44. Pass in order. As a result, in the first configuration example, an air flow from above to downward is formed in the target space 4.

FIG. 3 is a diagram showing a second configuration example of the airflow forming system 100 according to the first embodiment. In the second configuration example, as shown in FIG. 3, the reflux mechanism 2 includes a second opening 22 and a fan 24. The second opening 22 is provided on the floor 42, and introduces air from the target space 4 to the return path 20 via the space 43 below the floor 42. Specifically, the second opening 22 is a ventilation hole provided in the floor 42, and is configured by fitting, for example, a grill (mesh-shaped structure) or the like, and is configured as a target space 4 and a lower space 43. Connect with. In the example shown in FIG. 3, the second opening 22 is provided in each of the first interior space 4a and the second interior space 4b. The fan 24 is installed inside the duct 23 as in the first configuration example. Here, in the second configuration example, the lower end portion of the duct 23 is attached to the floor 42 so as to be connected to the lower space 43. Therefore, it is possible to introduce the air taken in from the target space 4 to the lower space 43 into the upper space 44 through the inside of the duct 23. Then, the fan 24 takes in air from the target space 4 through the second opening 22, and supplies the taken-in air to the upper space 44 through the inside of the duct 23.

In the second configuration example, the air supplied from the air conditioning system 1 to the target space 4 passes through the air supply port 46, the second opening 22, the lower space 43, the inside of the duct 23, and the upper space 44 in this order. .. As a result, in the second configuration example, an air flow from above to downward is formed in the target space 4.

FIG. 4 is a diagram showing a third configuration example of the airflow forming system 100 according to the first embodiment. In the third configuration example, as shown in FIG. 4, the reflux mechanism 2 further includes an intake fan 25 for sucking air from the target space 4 to the second opening 22. The intake fan 25 is installed in the lower space 43 of the floor 42 in the vicinity of the second opening 22, air is sucked from the target space 4 through the second opening 22, and the intake air is used in the lower space 43. It is supplied to the inside of the duct 23 via the duct 23. In the example shown in FIG. 4, one intake fan 25 is provided for each second opening 22.

In the third configuration example, the air supplied from the air conditioning system 1 to the target space 4 is the air supply port 46, the second opening 22, the intake fan 25, the lower space 43, the inside of the duct 23, and the upper space 44. Pass in the order of. As a result, in the third configuration example, an air flow from above to downward is formed in the target space 4. Further, in the third configuration example, since air is sucked from the target space 4 by the intake fan 25, it is easier to form an air flow from the upper side to the lower side as compared with the second configuration example.

By the way, when a plurality of second openings 22 are provided in the target space 4, it is preferable that the second openings 22 are configured so that the farther from the fan 24, the larger the opening area. With this configuration, the amount of air taken in from each of the second openings 22 tends to be uniform, and it becomes easy to form an air flow uniformly from above to below in the target space 4.

[controller]
Hereinafter, the controller 3 included in the airflow forming system 100 will be described in detail. The controller 3 is a control device that mainly controls the AHU11, the return fan 12, and the fan 24 of the air conditioning system 1. The controller 3 also controls the intake fan 25 when the airflow forming system 100 includes the intake fan 25. The controller 3 is a local controller installed in the facility, but may be realized as a cloud server installed outside the facility. The controller 3 includes a communication unit 31, an information processing unit 32, and a storage unit 33.

The communication unit 31 is a communication circuit (in other words, a communication module) for communicating with the AHU 11, the return blower 12, and the fan 24. Further, when the airflow forming system 100 includes an intake fan 25, or when a barometer 34 (see FIG. 5) or a differential pressure gauge 35 (see FIG. 6) described later is provided, the communication unit 31 also communicates with these devices. Communicate. The communication standard for communication performed by the communication unit 31 is not particularly limited.

The information processing unit 32 performs information processing for controlling the air flow formed in the target space 4. The information processing unit 32 is realized by, for example, a microcomputer, but may be realized by a processor. The information processing unit 32 has an acquisition unit 321 and a control unit 322 as functional components. The functions of the acquisition unit 321 and the control unit 322 are realized by, for example, a microcomputer or the like constituting the information processing unit 32 executing a computer program stored in the storage unit 33.

The acquisition unit 321 acquires the measurement result of the barometer 34 or the differential pressure gauge 35 or the control parameter of the return blower 12 via the communication unit 31. Specifically, when the control unit 322 follows the first control example described later, the acquisition unit 321 acquires the measurement result of the barometer 34. Here, the barometer 34 is a device that measures the atmospheric pressure in the upper space 44. Further, when the control unit 322 follows the second control example described later, the acquisition unit 321 acquires the measurement result of the differential pressure gauge 35. Here, the differential pressure gauge 35 is a device that measures the difference between the atmospheric pressure in the upper space 44 and the atmospheric pressure in the target space 4. Further, when the control unit 322 follows the third control example described later, the acquisition unit 321 acquires the control parameters of the return air blower 12 possessed by the air conditioning system 1.

The control unit 322 controls the fan 24. Specifically, the control unit 322 controls the fan 24 so that the amount of air sucked up by the fan 24 does not exceed the amount of air exhausted by the air conditioning system 1. That is, the control unit 322 controls so that the atmospheric pressure in the upper space 44 becomes a negative pressure, in other words, the atmospheric pressure in the upper space 44 becomes equal to or less than the atmospheric pressure in the target space 4. By controlling in this way, it becomes difficult for air to flow back from the upper space 44 to the target space 4 through the exhaust port 47, and it becomes difficult for the formation of an air flow from the upper side to the lower side to be hindered. Hereinafter, control examples of the fan 24 by the control unit 322 will be listed.

FIG. 5 is a block diagram showing a functional configuration of a first control example of the airflow forming system 100 according to the first embodiment. In the first control example, the control unit 322 controls the fan 24 based on the measurement result of the barometer 34, so that the amount of air sucked up by the fan 24 does not exceed the amount of air exhausted by the air conditioning system 1. The control to limit is realized. That is, the control unit 322 controls the fan 24 so that the measured value of the barometer 34 does not exceed the reference value. Here, the reference value is set in advance to a value that can be taken by the air pressure in the target space 4, for example, during the operation of the air conditioning system 1. Therefore, the control unit 322 controls so that the suction amount of the fan 24 becomes smaller when the measured value of the barometer 34 exceeds the reference value. As a result, the measured value of the barometer 34 is maintained below the reference value, and the pressure in the upper space 44 is maintained below the pressure in the target space 4.

FIG. 6 is a block diagram showing a functional configuration of a second control example of the airflow forming system 100 according to the first embodiment. In the second control example, the control unit 322 controls the fan 24 based on the measurement result of the differential pressure gauge 35, so that the amount of air sucked up by the fan 24 does not exceed the amount of air exhausted by the air conditioning system 1. The control to limit is realized. That is, the control unit 322 controls the fan 24 so that the measured value of the differential pressure gauge 35 is zero or less. Here, the measured value of the differential pressure gauge 35 is a value obtained by subtracting the atmospheric pressure of the target space 4 from the atmospheric pressure of the upper space 44. That is, if the measured value of the differential pressure gauge 35 is zero or less, the atmospheric pressure in the upper space 44 is equal to or less than the atmospheric pressure in the target space 4. Therefore, the control unit 322 controls so that the suction amount of the fan 24 becomes smaller when the measured value of the differential pressure gauge 35 exceeds zero. As a result, the measured value of the differential pressure gauge 35 is maintained at zero or less, and the atmospheric pressure of the upper space 44 is maintained at the atmospheric pressure of the target space 4 or less.

In the third control example, the control unit 322 calculates the displacement from the control parameters of the return blower 12 acquired by the acquisition unit 321. Here, the control parameters of the return blower 12 may include, for example, the rotation speed of the fan of the return blower 12, the operating frequency of the inverter of the return blower 12, the power consumption of the return blower 12, and the like. The control unit 322 calculates the amount of air sucked by the return blower 12, that is, the amount of air exhausted by the air conditioning system 1 based on the control parameters of the return blower 12. Then, the control unit 322 compares the amount of air sucked up by the fan 24 with the calculated displacement amount, and controls the fan 24 so that the suction amount does not exceed the displacement amount. As a result, the state in which the atmospheric pressure in the upper space 44 is equal to or lower than the atmospheric pressure in the target space 4 is maintained.

Further, when the target space 4 includes a plurality of spaces (here, the first indoor space 4a and the second indoor space 4b), the control unit 322 determines the amount of air supplied to the target space 4 for each space. That is, it is possible to control the strength of the air flow. Specifically, the control unit 322 controls the regulator 7 installed in the air supply duct 5 extending from the air conditioning system 1 to the air supply port 46 to supply the amount of air (air flow) to the target space 4. Strength) is controlled. The regulator 7 is, for example, a variable air volume control device (Variable Air Volume: VAV). The regulator 7 may be an air volume adjusting damper.

In the example shown in FIG. 1, air is supplied to the first interior space 4a through the first air supply duct 5a and the first air supply port 46a. The amount of air supplied to the first interior space 4a is controlled by the control unit 322 controlling the first regulator 7a installed in the first air supply duct 5a. Further, air is supplied to the second indoor space 4b through the second air supply duct 5b and the second air supply port 46b. The amount of air supplied to the second interior space 4b is controlled by the control unit 322 controlling the second regulator 7b installed in the second air supply duct 5b.

Further, the control unit 322 can control the air flow according to the number or density of people in the target space 4 (the number of people per unit area). It is considered that the higher the density of humans in the target space 4, the higher the possibility that fine particles (sprays, etc.) to which an infectious substance is attached are suspended in the air. That is, in the target space 4, it is considered that the risk of infection against an infectious disease caused by fine particles floating in the air is high. Therefore, the airflow forming system 100 may control the airflow according to the number or density of people in the target space 4 to form the airflow on average within the limitation of the ability of the device for forming the airflow. Instead, the airflow can be effectively formed according to the risk of infection.

The number or density of people in the target space 4 can be estimated, for example, by installing a camera in the target space 4. The camera is, for example, a surveillance camera, which is a device that captures an image (moving image or still image) of the target space 4 and transmits the image information of the captured image to the communication unit 31 of the controller 3. The control unit 322 estimates the number of people existing in the target space 4 by performing image processing on the image information acquired via the communication unit 31. For example, the control unit 322 performs face recognition processing on the image information and estimates the number of recognized faces as the number of people. In addition, the control unit 322 may estimate the number of people from the image information by using template matching or other existing methods. Further, when the floor area of the target space 4 is stored in the storage unit 33 in advance, the control unit 322 may calculate the density of people in the target space 4 by using the floor area. Then, the control unit 322 controls the regulator 7 so that the larger the number of people or the higher the density of people, the larger the amount of air (airflow intensity) supplied to the target space 4. ..

Further, the number or density of people in the target space 4 can be estimated by installing a carbon dioxide concentration sensor in the target space 4, for example. The carbon dioxide concentration sensor is a device that measures the concentration of carbon dioxide in the target space 4 and transmits the measured value to the communication unit 31 of the controller 3. The control unit 322 estimates the number of people in the target space 4 based on the measured value of the carbon dioxide concentration acquired via the communication unit 31. That is, the control unit 322 estimates that the higher the concentration of carbon dioxide, the larger the number of people existing in the target space 4. Further, when the floor area of the target space 4 is stored in the storage unit 33 in advance, the control unit 322 may calculate the density of people in the target space 4 by using the floor area. Then, the control unit 322 controls the regulator 7 so that the larger the number of people or the higher the density of people, the larger the amount of air (airflow intensity) supplied to the target space 4. ..

Of course, if the target space 4 includes a plurality of spaces (here, the first indoor space 4a and the second indoor space 4b), and the number or density of people can be estimated for each space. , The control unit 322 may control the air flow according to the number or density of people in each space. In this embodiment, for example, a camera or a carbon dioxide concentration sensor may be installed in the first interior space 4a and the second interior space 4b, respectively.

The storage unit 33 is a storage device that stores various information necessary for the information processing unit 32 to form and control an air flow in the target space 4, a computer program, and the like. The storage unit 33 is realized by, for example, a semiconductor memory or the like.

[Production method]
Hereinafter, a method for manufacturing the airflow forming system 100 according to the first embodiment will be described. Here, it is assumed that the air conditioning system 1 corresponding to the target space 4 is already installed in the facility. Of course, the air conditioning system 1 may not be installed already, or may be newly installed. In this case, the builder may perform the step of installing the air conditioning system 1 corresponding to the target space 4 in the manufacturing method of the airflow forming system 100 described below.

The manufacturing method of the airflow forming system 100 is executed by installing the recirculation mechanism 2 in the target space 4 in which the air conditioning system 1 is correspondingly installed. As described above, the air conditioning system 1 supplies air from the space 44 above the ceiling 41 in the target space 4 to the target space 4, and exhausts the air from the target space 4 to the space 44 above. As described above, the recirculation mechanism 2 forms a recirculation path 20 in which the air in the target space 4 is sucked in from a position closer to the floor 42 than the ceiling 41 in the target space 4, and the sucked air is returned to the upper space 44. do.

For example, in the case of manufacturing the airflow forming system 100 corresponding to the first configuration example, the installer installs the duct 23 corresponding to the return path 20 at an arbitrary position in the target space 4, and the upper end portion of the duct 23. Is executed in the process of connecting the above space 44 of the ceiling 41 to the space 44 above the ceiling 41. The position where the duct 23 is installed is preferably, for example, the corner of the room which is the target space 4. Further, the builder executes a step of making a hole in the duct 23 at a position closer to the floor 42 than the ceiling 41 to provide the first opening 21. The position of the first opening 21 is preferably closer to the floor 42. Then, the builder executes a step of installing the fan 24 inside the duct 23. In this way, the airflow forming system 100 corresponding to the first configuration example including the air conditioning system 1 and the recirculation mechanism 2 (duct 23, the first opening 21, and the fan 24) is manufactured.

Further, for example, in the case of manufacturing the airflow forming system 100 corresponding to the second configuration example, the builder installs the duct 23 corresponding to the return path 20 at an arbitrary position of the target space 4 in the same manner as described above. Then, the step of connecting the upper end portion of the duct 23 to the space 44 above the ceiling 41 is executed. Further, the builder executes a step of connecting the lower end portion of the duct 23 to the lower space 43 of the floor 42. Further, the builder executes a step of installing the fan 24 inside the duct 23 in the same manner as described above. Then, the builder executes a step of providing the second opening 22 by making a hole in the floor 42 of the target space 4 or removing the floor panel of the floor 42. In this way, the airflow forming system 100 corresponding to the second configuration example including the air conditioning system 1 and the recirculation mechanism 2 (duct 23, the second opening 22, and the fan 24) is manufactured.

Further, for example, in the case of manufacturing the airflow forming system 100 corresponding to the third configuration example, the installer further installs the intake fan 25 in the process of manufacturing the airflow forming system 100 corresponding to the second configuration example. Perform the process of The intake fan 25 is preferably installed in the vicinity of the second opening 22 in the space 43 below the floor 42, for example, directly under the second opening 22. In this way, the airflow forming system 100 corresponding to the third configuration example including the air conditioning system 1 and the recirculation mechanism 2 (duct 23, second opening 22, intake fan 25, and fan 24) is manufactured.

[advantage]
Hereinafter, the advantages of the airflow forming system 100 and the like according to the first embodiment will be described with reference to the airflow forming system of the comparative example. FIG. 7A is an explanatory diagram of the airflow formed by the airflow formation system of the comparative example. FIG. 7B is an explanatory diagram of the airflow formed by the airflow forming system 100 according to the first embodiment. In the example shown in FIG. 7B, the floor 42 is provided with the second opening 22 as in the second configuration example. The airflow forming system of the comparative example is different from the airflow forming system 100 according to the first embodiment in that it is merely an air conditioning system 1 that does not include the reflux mechanism 2.

As shown in FIG. 7A, the airflow forming system of the comparative example does not have the recirculation mechanism 2, so that the air in the target space 4 is taken in from the exhaust port 47 of the ceiling 41 to the upper space 44. Therefore, in the airflow formation system of the comparative example, the airflow from the upper side to the lower side is not formed in the target space 4, and even if the fine particles having the infectious substance (virus or the like) are suspended in the air, the fine particles are on the floor. It is hard to be blown down to the 42 side. As a result, in the airflow formation system of the comparative example, since the fine particles tend to stay in the target space 4 for a relatively long period of time, it is difficult to suppress the spread of the infectious disease caused by the fine particles suspended in the air, and the infection in the target space 4 is difficult. There was a problem that it was difficult to reduce the risk of infection with the disease.

On the other hand, in the airflow forming system 100 according to the first embodiment, as shown in FIG. 7B, it is possible to form an airflow (downflow) from the upper side to the lower side in the target space 4. Therefore, in the airflow forming system 100 according to the first embodiment, even if the fine particles to which the infectious substance (virus or the like) are attached are suspended in the air, the fine particles are blown down to the floor 42 side by the downflow. Therefore, the airflow forming system 100 according to the first embodiment can be expected to have an effect of suppressing the spread of infectious diseases caused by fine particles suspended in the air, and can easily reduce the risk of infectious diseases in the target space 4. There is an advantage.

Further, in the method for manufacturing the airflow forming system 100 according to the first embodiment, since the airflow from above to below can be formed in the target space 4 only by adding the recirculation mechanism 2 to the air conditioning system 1, the system can be formed. It also has the advantage of being easy to build. For example, when the air conditioning system 1 is installed in the facility in advance, the installer can construct the airflow forming system 100 only by executing the step of installing the recirculation mechanism 2 in the target space 4. That is, in the manufacturing method of the airflow forming system 100 according to the first embodiment, when it is desired to realize the formation of the airflow from the upper side to the lower side in the target space 4, it is not necessary to construct the system from scratch, and the existing air conditioning system It is possible to easily construct a system while reducing the cost by using 1.

(Embodiment 2)
[Constitution]
Hereinafter, the configuration of the airflow forming system 100A according to the second embodiment will be described. FIG. 8 is a diagram showing a configuration example of the airflow forming system 100A according to the second embodiment. The airflow formation system 100A according to the second embodiment is different from the airflow formation system 100 according to the first embodiment in that the return mechanism 2A is provided instead of the return mechanism 2. Specifically, the recirculation mechanism 2A takes in the air in the target space 4 from the floor 42 in the target space 4, and recirculates the intake air to the space 45 under the ceiling below the floor 42. To form. Further, the reflux mechanism 2A includes an opening 26 that introduces air from the target space 4 into the space 43 below the floor 42 and introduces air from the space 43 below the space 45 below the ceiling.

Specifically, the opening 26 is composed of a ventilation hole provided in the floor 42 and a ventilation hole provided in the construction material 48 that separates the floor and the downstairs where the target space 4 is located. For example, a grill (mesh-shaped structure) or the like is fitted in each ventilation hole. In the example shown in FIG. 8, one opening 26 is provided in each of the first interior space 4a and the second interior space 4b.

In the reflux mechanism 2A, the reflux path 20A is formed by using another air conditioning system 1A downstairs. The other air conditioning system 1A has the same configuration as the air conditioning system 1 except that the target space 4A is a space downstairs of the target space 4. That is, the other air harmonization system 1A supplies air from the space above the ceiling 41A (the space 45 behind the ceiling) in the target space 4A to the target space 4A, and exhausts the air from the target space 4A to the upper space. Utilizing the flow of air from the target space 4A through the space 45 behind the ceiling to the other air conditioning system 1A, the recirculation mechanism 2A has the target space 4, the opening 26, the space 45 behind the ceiling, and the like. In the order of the air conditioning system 1A of the above, a return path 20A through which air returns is formed. In the example shown in FIG. 8, the other air conditioning system 1A does not constitute the airflow forming system 100 (or 100A) together with the recirculation mechanism 2 (or 2A), but it may be.

[Production method]
Hereinafter, a method for manufacturing the airflow forming system 100A according to the second embodiment will be described. Here, it is assumed that the air conditioning system 1 corresponding to the target space 4 is already installed in the facility. Of course, the air conditioning system 1 may not be installed already, or may be newly installed. In this case, the builder may perform the step of installing the air conditioning system 1 corresponding to the target space 4 in the manufacturing method of the airflow forming system 100A described below.

The manufacturing method of the airflow forming system 100A is executed by installing the recirculation mechanism 2A in the target space 4 in which the air conditioning system 1 is correspondingly installed. As described above, the air conditioning system 1 supplies air from the space 44 above the ceiling 41 in the target space 4 to the target space 4, and exhausts the air from the target space 4 to the space 44 above. As described above, the recirculation mechanism 2A takes in the air in the target space 4 from the floor 42 in the target space 4, and recirculates the intake air to the space 45 under the ceiling below the floor 42. Form 20A. The recirculation mechanism 2A includes an opening 26 that introduces air from the target space 4 into the space 43 below the floor and from the space 43 below the space 45 under the ceiling.

Specifically, the builder executes a process of providing the opening 26 by making a hole connecting the floor 42 of the target space 4 to the space 45 behind the ceiling downstairs. In this way, the air flow forming system 100A including the air conditioning system 1 and the recirculation mechanism 2A (opening 26) is manufactured.

[advantage]
In the airflow forming system 100A according to the second embodiment, as in the first embodiment, an airflow (downflow) from above to downward can be formed in the target space 4, so that the infectious disease in the target space 4 can be formed. It has the advantage that it is easy to reduce the risk of infection. Further, in the airflow formation system 100A according to the second embodiment, since the return path 20A is formed by using another air conditioning system 1A downstairs, it is necessary to install the duct 23 and the fan 24 in the target space 4. There is also the advantage that there is no.

(Modification example)
Although the first and second embodiments have been described above, the present invention is not limited to the first and second embodiments. Hereinafter, modified examples of the first and second embodiments will be listed. The modifications described below may be combined as appropriate.

In the first and second embodiments, the controller 3 is responsible not only for controlling the fan 24 but also for controlling the air conditioning system 1, but the present invention is not limited to this. For example, the controller 3 may only control the fan 24. In this case, the air conditioning system 1 is controlled by a controller provided separately from the controller 3.

In the first and second embodiments, the ceiling 41 is provided with an exhaust port 47 for exhausting air from the target space 4 to the space 44 above the ceiling 41, but the ceiling 41 may not be provided with the exhaust port 47. .. That is, when the existing air conditioning system 1 is used before the air flow forming system 100 is installed, the air conditioning system 1 exhausts the air in the target space 4 from the exhaust port 47 provided in the ceiling 41. Ventilate with. In this case, when constructing the airflow forming system 100 using the existing air conditioning system 1, the exhaust port 47 may or may not be closed. When the exhaust port 47 is closed, the path for exhausting the air in the target space 4 is limited, and the efficiency of air intake from the target space 4 to the return path 20 is improved. Has the advantage of being easy to form.

The arrangement of the AHU 11, the fan 24, and the intake fan 25 in the first embodiment is an example. For example, the fan 24 may be installed not only in the duct 23 but also in the lower space 43 of the floor 42, as long as it can form an air flow from the return path 20 toward the upper space 44, or may be installed in the upper space 44 of the ceiling 41. It may be installed in. Similarly, the intake fan 25 may be installed not only in the space 43 below the floor 42 but also in the duct 23, for example, as long as it can form an air flow from the target space 4 to the return path 20. Further, the fan 24 and the intake fan 25 may be added or omitted as needed.

The arrangement of the first opening 21 and the second opening 22 in the first embodiment and the arrangement of the opening 26 in the second embodiment are examples. For example, in the example shown in FIG. 1, one first opening 21 is provided in each of the first interior space 4a and the second interior space 4b, but a plurality of first openings 21 may be provided. Similarly, in the examples shown in FIGS. 2 and 3, one second opening 22 is provided in each of the first interior space 4a and the second interior space 4b, but a plurality of second openings 22 may be provided. Further, in the example shown in FIG. 8, one opening 26 is provided in each of the first interior space 4a and the second interior space 4b, but a plurality of openings 26 may be provided.

The first opening 21 and the second opening 22 in the first embodiment and the opening 26 in the second embodiment have a variable opening area so that the amount of air intake from the target space 4 can be changed. It may be configured. This embodiment can be realized, for example, by providing an air volume adjusting damper in the first opening 21, the second opening 22, or the opening 26.

In the first and second embodiments, it is conceivable to control the air pressure of the air flow so as not to blow down the air flow with a large air volume that is unpleasant for the person existing in the target space 4. Specifically, the wind pressure of the airflow from the air supply port 46 is controlled so that the wind pressure of the airflow when reaching the floor 42 of the target space 4 is naturally attenuated to a weakness that is not unpleasant to humans. Can be considered. As an example, the distance from the ceiling 41 to the floor 42 in the target space 4 (that is, the height of the target space 4) is measured in advance, and the measured value is referred to by the air conditioning system 1 to supply air. The wind pressure of the air blown from the port 46 is controlled.

Further, as another example, a laser marking device is installed in the target space 4, and the distance from the ceiling 41 to the floor surface (including the floor 42) directly below the ceiling 41 is automatically measured by the laser marking device, and the measured value thereof is measured. May be controlled in the air conditioning system 1 to control the wind pressure of the air blown from the air supply port 46. In this control example, for example, even when the layout of furniture such as a desk or table is changed in the target space 4 and the furniture is located directly under the air supply port 46, the floor surface directly below the air supply port 46 (here). Then, it is possible to automatically set an appropriate wind pressure according to the distance to the surface of the fixture) as the wind pressure of the air blown from the air supply port 46. That is, in this control example, it is possible to automate the construction such as setting the wind pressure of the air blown from the air supply port 46 due to the change of the layout of the fixture in the target space 4, and there is an advantage that troublesome construction is not required. ..

Further, as the means for controlling the air pressure of the air flow, in addition to the means for controlling the wind pressure of the air blown from the air supply port 46 as described above, the means for controlling the air volume of the air flow returning to the reflux mechanism 2 (or 2A). Is also possible. That is, it is possible to control the air pressure of the air flow in the target space 4 by adjusting the air volume of the air flow returning to the recirculation mechanism 2 (or 2A) while keeping the air pressure of the air blown from the air supply port 46 constant. .. In this case, the air that is not recirculated by the recirculation mechanism 2 (or 2A) is exhausted to the upper space 44 through, for example, the exhaust port 47 of the ceiling 41.

For example, in the first and second embodiments, the control unit 322 is realized by a single device, but may be realized by a plurality of devices. When the control unit 322 is realized by a plurality of devices, the functional components included in the control unit 322 may be distributed to the plurality of devices in any way.

Further, the communication method between the devices in the above-described first and second embodiments is not particularly limited. When two devices communicate with each other in the first and second embodiments, a relay device (not shown) may be interposed between the two devices.

Further, in the first and second embodiments, each component of the controller 3 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.

Further, each component of the controller 3 may be realized by hardware. For example, each component may be a circuit (or an integrated circuit). These circuits may form one circuit as a whole, or may be separate circuits from each other. Further, each of these circuits may be a general-purpose circuit or a dedicated circuit.

In addition, it is realized by a form obtained by applying various modifications to each embodiment that a person skilled in the art can think of, or by arbitrarily combining the components and functions in each embodiment within the range not deviating from the gist of the present invention. Also included in the present invention.

(summary)
As described above, the airflow forming system 100 includes an air conditioning system 1 and a reflux mechanism 2. The air conditioning system 1 supplies air from the space 44 above the ceiling 41 in the target space 4 to the target space 4, and exhausts the air from the target space 4 to the space 44 above. The recirculation mechanism 2 forms a recirculation path 20 in which the air in the target space 4 is sucked in from a position closer to the floor 42 than the ceiling 41 in the target space 4, and the sucked air is returned to the upper space 44.

According to such an airflow forming system 100, since an airflow from above to downward can be formed in the target space 4, there is an advantage that the risk of infection with an infectious disease in the target space 4 can be easily reduced.

Further, for example, in the air flow forming system 100, the reflux mechanism 2 includes a first opening 21 and a fan 24. The first opening 21 is provided at a position closer to the floor 42 than the ceiling 41, and introduces air from the target space 4 into the return path 20. The fan 24 sucks air toward the upper space 44 via the reflux path 20.

According to such an airflow forming system 100, there is an advantage that an airflow from above to downward can be formed in the target space 4 by providing a relatively simple configuration of the first opening 21 and the fan 24. be.

Further, for example, in the air flow forming system 100, the reflux mechanism 2 includes a second opening 22 and a fan 24. The second opening 22 is provided on the floor 42, and introduces air from the target space 4 to the return path 20 via the space 43 below the floor 42. The fan 24 sucks air toward the upper space 44 via the reflux path 20.

According to such an airflow forming system 100, there is an advantage that an airflow from above to below can be formed in the target space 4 by providing a relatively simple configuration of the second opening 22 and the fan 24. be.

Further, for example, in the airflow forming system 100, the reflux mechanism 2 further includes an intake fan 25 for sucking air from the target space 4 to the second opening 22.

According to such an airflow forming system 100, since air is taken in from the target space 4 toward the return path 20 by the intake fan 25, there is an advantage that it becomes easy to form an airflow from upward to downward in the target space 4. There is.

Further, for example, the airflow forming system 100 further includes a control unit 322 that controls the fan 24. The control unit 322 controls the fan 24 so that the amount of air sucked up by the fan 24 does not exceed the amount of air exhausted by the air conditioning system 1.

According to such an airflow forming system 100, there is an advantage that air does not easily flow back from the upper space 44 to the target space 4, and the formation of an airflow from the upper side to the lower side is less likely to be hindered.

Further, for example, the airflow forming system 100 further includes a barometer 34 that measures the atmospheric pressure in the upper space 44. The control unit 322 controls the fan 24 so that the measured value of the barometer 34 does not exceed the reference value.

Further, for example, the airflow forming system 100 further includes a differential pressure gauge 35 that measures the difference between the atmospheric pressure in the upper space 44 and the atmospheric pressure in the target space 4. The control unit 322 controls the fan 24 so that the measured value of the differential pressure gauge 35 becomes zero or less.

Further, for example, the airflow forming system 100 further includes an acquisition unit 321 that acquires the control parameters of the return air blower 12 possessed by the air conditioning system 1. The control unit 322 calculates the displacement from the control parameters acquired by the acquisition unit 321.

Further, for example, the airflow forming system 100A includes an air conditioning system 1 and a reflux mechanism 2A. The air conditioning system 1 supplies air from the space 44 above the ceiling 41 in the target space 4 to the target space 4, and exhausts the air from the target space 4 to the space 44 above. The recirculation mechanism 2A forms a recirculation path 20A that takes in the air of the target space 4 from the floor 42 in the target space 4 and returns the taken-in air to the space 45 under the ceiling below the floor 42. The reflux mechanism 2A includes an opening 26 that introduces air from the target space 4 into the space 43 below the floor 42, and also introduces air from the space 43 below into the space 45 below the ceiling.

According to such an airflow forming system 100A, since an airflow from above to downward can be formed in the target space 4, there is an advantage that the risk of infection with an infectious disease in the target space 4 can be easily reduced.

Further, for example, in the manufacturing method of the airflow forming system 100, the reflux mechanism 2 is installed in the target space 4 in which the air conditioning system 1 is correspondingly installed. The air conditioning system 1 supplies air from the space 44 above the ceiling 41 in the target space 4 to the target space 4, and exhausts the air from the target space 4 to the space 44 above. The recirculation mechanism 2 forms a recirculation path 20 in which the air in the target space 4 is sucked in from a position closer to the floor 42 than the ceiling 41 in the target space 4, and the sucked air is returned to the upper space 44.

According to the manufacturing method of the airflow forming system 100 as described above, the airflow from the upper side to the lower side can be formed in the target space 4 only by adding the recirculation mechanism 2 to the air conditioning system 1, so that the system is constructed. It has the advantage of being easy.

Further, for example, in the manufacturing method of the airflow forming system 100, the air conditioning system 1 is installed corresponding to the target space 4, and the reflux mechanism 2 is installed in the target space 4. The air conditioning system 1 supplies air from the space 44 above the ceiling 41 in the target space 4 to the target space 4, and exhausts the air from the target space 4 to the space 44 above. The recirculation mechanism 2 forms a recirculation path 20 in which the air in the target space 4 is sucked in from a position closer to the floor 42 than the ceiling 41 in the target space 4, and the sucked air is returned to the upper space 44.

According to such a manufacturing method of the airflow forming system 100, it is possible to form an airflow from the upper side to the lower side in the target space 4 only by adding the air conditioning system 1 and the recirculation mechanism 2. Therefore, the system is constructed. It has the advantage of being easy.

1,1A Air conditioning system 12

Return blower

2,

2A Recirculation mechanism

20,20A Recirculation path 21 1st opening 22 2nd opening 24 Fan 25 Intake fan 26 Opening 321 Acquisition part 322 Control part 34 Barometer 35

Barometer

4 ,

4A Target space

41,41A Ceiling 42 Floor 43 Lower space 44 Upper space 45 Behind the ceiling Space 100,100A Airflow formation system

Claims

An air conditioning system that supplies air from the space above the ceiling in the target space to the target space and exhausts the air from the target space to the upper space.
It is provided with a recirculation mechanism for sucking air in the target space from a position closer to the floor than the ceiling in the target space and forming a recirculation path for recirculating the sucked air to the upper space.
Airflow formation system.
The reflux mechanism is
A first opening provided at a position closer to the floor than the ceiling to introduce the air from the target space to the return path.
A fan that sucks the air toward the upper space through the reflux path.
The airflow forming system according to claim 1.
The reflux mechanism is
A second opening provided on the floor to introduce the air from the target space through the space below the floor to the reflux path.
A fan that sucks the air toward the upper space through the reflux path.
The airflow forming system according to claim 1.
The reflux mechanism further comprises an intake fan for sucking the air from the target space to the second opening.
The airflow forming system according to claim 3.
Further provided with a control unit for controlling the fan,
The control unit controls the fan so that the amount of air sucked up by the fan does not exceed the amount of air exhausted by the air conditioning system.
The airflow forming system according to any one of claims 2 to 4.
Further equipped with a barometer for measuring the atmospheric pressure in the upper space,
The control unit controls the fan so that the measured value of the barometer does not exceed the reference value.
The airflow forming system according to claim 5.
Further equipped with a differential pressure gauge that measures the difference between the atmospheric pressure in the upper space and the atmospheric pressure in the target space.
The control unit controls the fan so that the measured value of the differential pressure gauge becomes zero or less.
The airflow forming system according to claim 5.
Further provided with an acquisition unit for acquiring the control parameters of the return blower of the air conditioning system.
The control unit calculates the displacement from the control parameters acquired by the acquisition unit.
The airflow forming system according to claim 5.
An air conditioning system that supplies air from the space above the ceiling in the target space to the target space and exhausts the air from the target space to the upper space.
A recirculation mechanism for forming a recirculation path for sucking air in the target space from the floor in the target space and recirculating the sucked air to the space under the ceiling below the floor is provided.
The reflux mechanism includes an opening that introduces the air from the target space into the space below the floor and introduces the air from the space below the space below the ceiling.
Airflow formation system.
In the target space where an air conditioning system correspondingly installed to supply air from the space above the ceiling in the target space to the target space and exhaust the air from the target space to the upper space.
A recirculation mechanism is installed to form a recirculation path in which the air in the target space is sucked in from a position closer to the floor than the ceiling in the target space and the sucked air is recirculated to the upper space.
How to manufacture an airflow formation system.
An air conditioning system that supplies air from the space above the ceiling in the target space to the target space and exhausts the air from the target space to the upper space is installed corresponding to the target space.
A recirculation mechanism is installed to form a recirculation path in which the air in the target space is sucked in from a position closer to the floor than the ceiling in the target space and the sucked air is recirculated to the upper space.
How to manufacture an airflow formation system.