Airflow formation system

Abstract

To provide an air flow forming system that allows a user to perceive an air flow with an aroma.SOLUTION: An air flow forming system 10 includes: a plurality of ducts 25 disposed in parallel along a virtual plane positioned between an upper space 83 and a lower space 85; a blower 21 for blowing air into the ducts 25; and an aroma generation device 30 for generating an aroma in the upper space 83. An elongated air blowing port 26 along a longitudinal direction of the ducts is provided at a surface facing respective lower spaces 85 of the ducts 25.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an airflow formation system.

Background Art

[0002] Various techniques for forming an airflow in a space have been proposed. Patent Document 1 discloses an air conditioning device capable of blowing out conditioned air from the ceiling toward the lower part of the indoor space.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] The present invention provides an airflow formation system capable of making a user perceive an airflow by means of a fragrance.

Means for Solving the Problems

[0005] An airflow formation system according to an aspect of the present invention includes a plurality of ducts arranged in parallel along a virtual plane located between a first space and a second space, a blower for blowing air into the plurality of ducts, and a fragrance generator for generating a fragrance in the first space. A long blowing outlet along the longitudinal direction of the duct is provided on each surface of the plurality of ducts facing the second space.

Effects of the Invention

[0006] An airflow formation system according to an aspect of the present invention can make a user perceive an airflow by means of a fragrance.

Brief Description of the Drawings

[0007] [Figure 1]Figure 1 is an external view of an airflow forming system according to an embodiment. [Figure 2] Figure 2 is a block diagram showing the functional configuration of the airflow formation system according to the embodiment. [Figure 3] Figure 3 is a cross-sectional view of multiple ducts. [Figure 4] Figure 4 is a flowchart illustrating the operation of linking airflow strength with fragrance strength. [Figure 5] Figure 5 is a flowchart showing the operation of linking the on (or off) of the airflow generator with the on (or off) of the fragrance generator. [Figure 6] Figure 6 is an external view of an airflow generator according to a modified example. [Modes for carrying out the invention]

[0008] The embodiments will be described in detail below with reference to the drawings. Note that the embodiments described below are all comprehensive or specific examples. The numerical values, shapes, materials, components, arrangement positions and connection configurations of components, steps, and the order of steps shown in the following embodiments are examples only and are not intended to limit the present invention. Furthermore, components in the following embodiments that are not described in an independent claim will be described as optional components.

[0009] Please note that each figure is a schematic diagram and not necessarily a strictly accurate representation. Furthermore, in each figure, substantially identical components are denoted by the same reference numerals, and redundant explanations may be omitted or simplified.

[0010] (Embodiment) [composition] First, the configuration of the airflow forming system according to the embodiment will be described. Figure 1 is an external view of the airflow forming system according to the embodiment. Figure 2 is a block diagram showing the functional configuration of the airflow forming system according to the embodiment.

[0011] The airflow forming system 10 according to this embodiment is a system that can form a downflow airflow in an indoor space such as a room 80. Specifically, the airflow forming system 10 comprises an airflow generator 20, a fragrance generator 30, and a control device 40.

[0012] First, the airflow generator 20 will be described. The airflow generator 20 comprises a blower 21 and a plurality of ducts 25. The blower 21 is installed in the internal space of the wall 82 of the room 80 and blows air into the plurality of ducts 25 by drawing in air from an opening provided in the lower part of the wall 82. The blower 21 comprises a plurality of fans 22, a plurality of pipes 23, and a filter unit 24. The plurality of fans 22 include an impeller (not shown) for generating high-pressure air and a motor (not shown) for driving the impeller.

[0013] The piping 23 guides the air delivered by the fan 22 to the filter unit 24. The piping 23 is made of, for example, a resin material, but may also be made of a lightweight metal material such as aluminum.

[0014] The filter unit 24 has, for example, a HEPA (High Efficiency Particulate Air) filter to remove fine particles contained in the air flowing from the piping 23 into the duct 25. The housing of the filter unit 24 is formed of, for example, a resin material, but may also be formed of a lightweight metal material such as aluminum.

[0015] Multiple ducts 25 are arranged in parallel along a virtual plane S (shown in Figure 3) located between the upper space 83 and the lower space 85. Figure 3 is a cross-sectional view of the multiple ducts 25, more specifically, a cross-sectional view when the multiple ducts 25 are cut by a plane perpendicular to the longitudinal direction. For simplification, only two of the multiple ducts 25 are shown in Figure 3. The upper space 83 is the space between the ceiling 81 and the multiple ducts 25, and the lower space 85 is the space between the multiple ducts 25 and the floor 86.

[0016] The duct 25 is hollow and elongated, and is formed of, for example, a resin material. 。 The duct 25 may be formed of a lightweight metal material such as aluminum. On the surface (lower surface) of the duct 25 facing the lower space 85, an elongated outlet 26 extending along the longitudinal direction of the duct 25 is provided. The end portions in the longitudinal direction of the duct 25 are connected to the filter unit 24 of the blower 21. When the blower 21 blows air, the air is sent into the interior of the duct 25 through the opening provided at the end portion. As a result, an air current is blown out from the outlet 26 into the lower space 85. Note that no opening is provided in the duct 25 other than the outlet 26 and the opening provided at the end portion.

[0017] As shown in FIG. 3, when an air current is blown out from the outlets of each of the plurality of ducts 25 into the lower space 85, the space 84 between the plurality of ducts 25 becomes a negative pressure, and the air in the upper space 83 of the plurality of ducts 25 is attracted into the space 84. As a result, the air current generating device 20 can blow out a downflow air current (surface air current) with excellent straightness, which is a combination of the air current blown out from the outlets 26 of the plurality of ducts 25 and the air current (corresponding to the white arrow in FIG. 3; hereinafter also referred to as the induced air current) based on the attracted air. According to the downflow air current, aerosols such as droplets in the lower space 85 are blown down toward the floor 86 side. As a result, an effect of suppressing the spread of infectious diseases and the like can be obtained.

[0018] Next, the fragrance generating device 30 will be described. The fragrance generating device 30 is installed in the upper space 83 and generates a fragrance in the upper space 83 (outside the plurality of ducts 25). The fragrance generating device 30 is connected to, for example, a cartridge filled with a liquid containing a fragrance component (hereinafter also referred to as a fragrance), and the fragrance in the cartridge is sprayed into the upper space. Examples of the fragrance generation method include a heating method, a misting method, or a vaporization method. The heating method is a method of raising the temperature to volatilize the fragrance. The misting method is a method of misting the fragrance by ultrasonic vibration or the like and spraying it. The vaporization method is a method of volatilizing the fragrance with wind and spraying it.

[0019] The fragrance generating device 30 can generate multiple types of fragrances by replacing the cartridge. Also, the fragrance generating device 30 may be configured such that a plurality of cartridges can be connected and the fragrance can be switched without replacing the cartridge.

[0020] The fragrance generating device 30 is disposed in the upper space 83. More specifically, the fragrance generating device 30 is disposed above the space 84 between the plurality of ducts 25 (see FIG. 3). When the fragrance generating device 30 is disposed above the space 84, it can be said that the fragrance generating device 30 is located at a position visible from between the plurality of ducts 25 in the upper space 83 when looking from the lower space 85 to the upper space 83. Note that the position of the fragrance generating device 30 more specifically means the position of the part (fragrance generating part) from which the fragrance is released from the inside to the outside of the fragrance generating device 30. The airflow forming system 10 may include a plurality of fragrance generating devices 30 (fragrance generating parts). In this case, all the fragrance generating devices 30 may be disposed above the space 84, or only some of them may be disposed above the space 84.

[0021] In the airflow forming system 10, the fragrance generating device 30 is disposed in the upper space 83, and the downflow airflow generated in the room 80 contains the fragrance. The downflow airflow generated by the airflow generating device 20 may be difficult for a person located in the room 80 to perceive, but the airflow forming system 10 can make the downflow airflow perceivable by the fragrance.

[0022] Also, as described above, in the airflow forming system 10, since the fragrance generating device 30 is disposed outside (on the outer side) of the airflow generating device 20, the attracting airflow contains the fragrance instead of the airflow blown out from the outlet 26 of the duct 25. Thereby, deposition of the fragrance inside (on the inner side) of the airflow generating device 20 is suppressed, and maintenance of the airflow generating device 20 becomes easy.

[0023] Furthermore, if the fragrance generator 30 is located inside the airflow generator 20, and the fragrance generator 30 has a configuration that allows it to switch fragrances, there is a concern that if fragrances are deposited inside the airflow generator 20, the fragrances will mix and it will not be possible to properly generate the fragrance. In contrast, in the airflow forming system 10, the fragrance generator 30 is located outside the airflow generator 20, so even if the fragrance generator 30 has a configuration that allows it to switch fragrances, it can properly generate the fragrance.

[0024] The advantages of the fragrance generator 30 generating fragrance in the upper space 83 will be further explained below. The airflow in the upper space 83 is gentler than that in the lower space 84 (the space where the airflow blown out from the outlet 26 of the duct 25 mixes with the induced airflow), and this airflow is directed towards the space between the ducts 25 (space 84). Therefore, in order to make the fragrance reach a wide area of ​​the lower space 84, it is considered effective to generate the fragrance in the upper space 83 rather than the lower space 84, diffuse the fragrance within the upper space 83, and then draw it into the space between the ducts 25 (space 84).

[0025] To include the fragrance over a wide range of the downflow airflow emitted by the airflow generator 20, the fragrance generator 30 should be positioned in the central part of the upper space 83 in the direction in which the multiple ducts 25 are aligned. Conversely, if it is desired to include the fragrance only in a specific range of the downflow airflow emitted by the airflow generator 20, the fragrance generator 30 should be positioned in the lower space 84.

[0026] Next, the control device 40 will be described. The control device 40 is an information terminal operated by the user to control the airflow generator 20 and the fragrance generator 30. The control device 40 is, for example, a remote controller for the airflow generator 20, but it may also be implemented by installing a predetermined application program on a general-purpose device such as a smartphone or tablet terminal. Alternatively, the control device 40 may be an EMS (Energy Management System) controller or the like.

[0027] Specifically, the control device 40 comprises an operation reception unit 41, a control unit 42, and a storage unit 43. Although not shown in the figures, the control device 40 (control unit 42) and the airflow generator 20 and the fragrance generator 30 can communicate via wired or wireless communication, and the control device 40 can control the airflow generator 20 and the fragrance generator 30 via wired or wireless communication.

[0028] The operation reception unit 41 receives user input. The operation reception unit 41 is implemented, for example, by a touch panel, but may also include hardware buttons. Although not shown in the figures, the operation reception unit 41 may include a display unit implemented by a display panel such as a liquid crystal panel or an organic EL (Electro-Luminescence) panel, and the operation reception unit 41 and the display unit may constitute a GUI (Graphical User Interface).

[0029] The control unit 42 controls the on (operation) and off (stop) of the airflow generator 20 based on the user's operation received by the operation reception unit 41. The control unit 42 also controls the strength of the airflow generated by the airflow generator 20 (for example, the rotational speed of the fan 22 of the blower 21) based on the user's operation received by the operation reception unit 41. The strength of the airflow can be rephrased as airflow volume or wind speed.

[0030] Furthermore, the control unit 42 controls the on (operation) and off (stop) of the fragrance generator 30 based on the user's operation received by the operation reception unit 41. The control unit 42 also controls the intensity of the fragrance generated by the fragrance generator 30 based on the user's operation received by the operation reception unit 41. Here, the fragrance generator 30 generates fragrance intermittently, and the control unit 42 controls the intensity of the fragrance by changing, for example, the amount of fragrance emitted per instance by the fragrance generator 30. The control unit 42 may also control the intensity of the fragrance by changing the time interval between fragrance generation, in which case the shorter the time interval between fragrance generation, the stronger the fragrance. Alternatively, the control unit 42 may control the intensity of the fragrance by changing both the amount of fragrance generated per instance and the time interval between fragrance generation.

[0031] The control unit 42 may be implemented by a microcomputer, for example, but may also be implemented by a processor. The functions of the control unit 42 are realized, for example, by the microcomputer or other device constituting the control unit 42 executing a computer program stored in the storage unit 43.

[0032] The memory unit 43 is a storage device that stores various information necessary for the control unit 42 to control the airflow generator 20 and the fragrance generator 30, as well as computer programs. The memory unit 43 is implemented, for example, by semiconductor memory. The memory unit 43 may also be built into the control unit 42.

[0033] [The relationship between airflow strength and fragrance strength] As described above, the user can individually change the strength of the airflow generated by the airflow generator 20 and the strength of the fragrance generated by the fragrance generator 30 by operating the control device 40. Here, the airflow forming system 10 may automatically link the strength of the fragrance generated by the fragrance generator 30 to the strength of the airflow generated by the airflow generator 20. Figure 4 is a flowchart of the operation of linking the strength of the airflow and the strength of the fragrance. Note that the operation in Figure 4 is implemented, for example, as one of the operation modes (linked mode) of the airflow forming system 10 that can be selected by the user.

[0034] The control unit 41 of the control device 40 receives an operation from the user to change the strength of the airflow (S11). The control unit 42 changes the strength of the airflow generated by the airflow generator 20 based on the received operation (S12). The control unit 42 can change the strength of the airflow generated by the airflow generator 20 by, for example, transmitting a control signal to the airflow generator 20 via wired communication or wireless communication.

[0035] Next, the control unit 42 changes the intensity of the fragrance emitted by the fragrance generator 30 (S13). In step S12, the control unit 42 increases the intensity of the fragrance emitted by the fragrance generator 30 when the airflow is strengthened (the amount of air blown by the blower 21 increases), and decreases the intensity of the fragrance emitted by the fragrance generator 30 when the airflow is weakened (the amount of air blown by the blower 21 decreases). Note that the processes in steps S12 and S13 may be performed in parallel. As described above, the change in fragrance intensity is achieved by controlling at least one of the amount of fragrance generated and the time interval at which the fragrance is generated.

[0036] In this way, the airflow forming system 10 can prevent the fragrance from becoming too strong or too weak by linking the strength of the airflow with the strength of the fragrance. In other words, the airflow forming system 10 can optimize the strength of the fragrance.

[0037] In the example shown in Figure 4, the airflow forming system 10 linked the intensity of the fragrance generated by the fragrance generator 30 to the airflow strength of the airflow generator 20. However, the airflow strength of the airflow generator 20 may also be linked to the intensity of the fragrance generated by the fragrance generator 30. In other words, the airflow forming system 10 may change the intensity of the fragrance generated by the fragrance generator 30 based on the user's operation to change the fragrance intensity, and further, it may also change the airflow strength generated by the airflow generator 20.

[0038] Furthermore, in the example shown in Figure 4, the airflow strength and fragrance intensity were changed based on user input. However, the airflow strength and fragrance intensity may also be changed based on measurements from a sensor that senses the air quality of room 80. Examples of such sensors include a carbon dioxide concentration sensor and a particulate matter concentration sensor.

[0039] For example, the control unit 42 of the control device 40 acquires measured values ​​from these sensors via wired or wireless communication, and the higher the measured value (higher carbon dioxide concentration or particulate matter concentration), the stronger the airflow generated by the airflow generator 20 and the stronger the fragrance generated by the fragrance generator 30. In this way, the airflow formation system 10 improves the air quality in the room 80 and allows the user to perceive a downflow airflow through fragrance.

[0040] [On / off synchronization of airflow generator and fragrance generator] Furthermore, the airflow forming system 10 may automatically link the on (or off) of the fragrance generator 30 to the on (or off) of the airflow generator 20. Figure 5 is a flowchart of the operation of linking the on (or off) of the airflow generator and the on (or off) of the fragrance generator. Note that the operation in Figure 5 is implemented, for example, as one of the user-selectable operating modes (linked mode) of the airflow forming system 10.

[0041] The operation reception unit 41 of the control device 40 receives an operation from the user to turn the airflow generator 20 on (or off) (S21). The control unit 42 turns the airflow generator 20 on (or off) based on the received operation (S22). The control unit 42 can turn the airflow generator 20 on (or off) by, for example, transmitting a control signal to the airflow generator 20 via wired communication or wireless communication.

[0042] Next, the control unit 42 turns the fragrance generator 30 on (or off) (S23). In step S22, the control unit 42 turns on (operates) the fragrance generator 30 when the airflow generator 20 is turned on (the blower 21 is running), and in step S22, the control unit 42 turns off (stops) the fragrance generator 30 when the airflow generator 20 is turned off (the blower 21 is stopped). Note that the processes in steps S22 and S23 may be performed in parallel.

[0043] In this way, the airflow forming system 10 can suppress inconsistencies in the operating states (on or off) of the airflow generator 20 and the fragrance generator 30, such as when fragrance is generated even though no airflow is being generated, or when fragrance is not generated even though airflow is being generated.

[0044] In the example shown in Figure 5, the airflow forming system 10 linked the on / off state of the fragrance generator 30 to the on / off state of the airflow generator 20. However, the on / off state of the airflow generator 20 may also be linked to the on / off state of the fragrance generator 30. In other words, the airflow forming system 10 may turn the fragrance generator 30 on (or off) based on the user's operation to turn the fragrance generator 30 on (or off), and further turn the airflow generator 20 on (or off).

[0045] Furthermore, in the example shown in Figure 5, the airflow generator 20 and the fragrance generator 30 were turned on (or off) based on user operation. However, the airflow generator 20 and the fragrance generator 30 may also be turned on (or off) based on measurements from a sensor that senses the air quality of the room 80. Examples of such sensors include a carbon dioxide concentration sensor and a particulate matter concentration sensor.

[0046] For example, the control unit 42 of the control device 40 acquires measured values ​​from these sensors via wired or wireless communication, and turns on the airflow generator 20 and the fragrance generator 30 when the measured value exceeds a first predetermined value. The control unit 42 turns off the airflow generator 20 and the fragrance generator 30 when the measured value falls below a second predetermined value. The first predetermined value and the second predetermined value may be the same value, or the second predetermined value may be smaller than the first predetermined value. In other words, hysteresis may be provided. As a result, the airflow formation system 10 aims to improve the air quality in the room 80 and allows the user to perceive a downflow airflow through fragrance.

[0047] [Variations of airflow generators] In the above embodiment, the multiple ducts 25 of the airflow generator 20 were arranged along the ceiling 81, but they may also be arranged along the walls. In other words, the airflow generator 20 may generate airflow from one wall side of the room 80.

[0048] Furthermore, although the above embodiment includes three or more ducts 25, the airflow generator 20 may also include only two ducts 25. For example, the airflow generator 20 may be realized as a device that forms an air curtain by a downflow airflow (surface airflow) with excellent straight-line properties, which is formed by combining the airflow blown out from the outlets 26 of the two ducts 25 with an induced airflow. Figure 6 is an external view of an airflow generator according to such a modified example.

[0049] The airflow generator 20a shown in Figure 6 forms an air curtain using a downflow airflow. This air curtain can suppress droplets emitted by one user from reaching another user. Furthermore, a configuration that forms an air curtain using a downflow airflow, such as the airflow generator 20a, makes it less likely for droplets to be stirred up compared to a configuration that forms an air curtain using an upflow airflow. For this reason, the airflow generator 20a can be said to have a high effect in suppressing the spread of infectious diseases.

[0050] The airflow forming system 10 may include an airflow generator 20a instead of the airflow generator 20. In other words, the fragrance generator 30 may be combined with the airflow generator 20a. The operations described in the above embodiment may be performed with the airflow generator 20a as the controlled object instead of the airflow generator 20.

[0051] [Effects, etc.] As described above, the airflow forming system 10 comprises a plurality of ducts 25 arranged in parallel along a virtual plane S located between the first space and the second space, a blower 21 that blows air into the plurality of ducts 25, and a fragrance generating device 30 that generates fragrance in the first space. Each of the plurality of ducts 25 is provided with an elongated outlet along the longitudinal direction of the duct on the surface facing the second space. The upper space 83 in the above embodiment is an example of the first space here, the lower space 85 in the above embodiment is an example of the second space here, and the virtual plane S in the above embodiment is an example of the virtual plane here.

[0052] This airflow formation system 10 incorporates a fragrance (scent) into the airflow induced from the first space to the second space, thereby allowing the user to experience the fragrance. to It can make airflow perceptible.

[0053] Furthermore, for example, when viewing the first space from the second space, the fragrance generating device 30 is located in a place visible from between the multiple ducts 25 in the first space.

[0054] Such an airflow formation system 10 can efficiently incorporate fragrance (fragrance) into the airflow drawn from the first space to the second space.

[0055] Furthermore, for example, the airflow forming system 10 also includes a control unit 42 that controls the intensity of the fragrance emitted by the fragrance generating device 30.

[0056] Such an airflow forming system 10 can control the intensity of the fragrance emitted by the fragrance generator 30.

[0057] Furthermore, for example, the control unit 42 controls the intensity of the fragrance based on the amount of fragrance generated.

[0058] Such an airflow forming system 10 can control the intensity of the fragrance based on the amount of fragrance generated.

[0059] Furthermore, for example, the control unit 42 controls the intensity of the fragrance based on the time interval at which the fragrance is generated.

[0060] Such an airflow forming system 10 can control the intensity of the fragrance based on the time interval at which the fragrance is generated.

[0061] Furthermore, for example, the control unit 42 increases the intensity of the fragrance emitted by the fragrance generator 30 when the airflow rate of the blower 21 increases, and decreases the intensity of the fragrance emitted by the fragrance generator 30 when the airflow rate decreases.

[0062] Such an airflow formation system 10 can optimize the intensity of the fragrance.

[0063] Furthermore, for example, the control unit 42 stops the fragrance generator 30 when the blower 21 stops, and starts the fragrance generator 30 when the blower 21 starts.

[0064] Such an airflow forming system 10 can suppress inconsistencies in the operating states (on or off) of the airflow generator 20 and the fragrance generator 30.

[0065] Furthermore, for example, the first space is an upper space 83 located above the virtual plane S, and the second space is a lower space 85 located below the virtual plane S.

[0066] Such an airflow forming system 10 can form a downflow airflow in the space below 85.

[0067] (Other embodiments) Although embodiments have been described above, the present invention is not limited to the embodiments described above.

[0068] For example, in the above embodiment, the airflow forming system was implemented by multiple devices. In this case, the components of the airflow forming system (especially the functional components) may be distributed among the multiple devices in any way. Alternatively, the airflow forming system may be implemented as a single device. For example, the airflow forming system may be implemented as a single device corresponding to a control device.

[0069] Furthermore, the processing order described in the above embodiment is merely an example. The order of multiple processing steps may be changed, and multiple processing steps may be executed in parallel. In addition, a processing step performed by one processing step may be performed by another processing step.

[0070] Furthermore, in the above embodiment, each component may be realized by executing a software program suitable for each component. Each component may also be realized by a program execution unit such as a CPU or processor reading and executing a software program recorded on a recording medium such as a hard disk or semiconductor memory.

[0071] Furthermore, each component may be implemented by hardware. For example, each component may be a circuit (or integrated circuit). These circuits may form a single circuit as a whole, or they may be separate circuits. Also, each of these circuits may be a general-purpose circuit or a dedicated circuit.

[0072] Furthermore, general or specific embodiments of the present invention may be implemented as a system, apparatus, method, integrated circuit, computer program, or recording medium such as a computer-readable CD-ROM. They may also be implemented in any combination of the system, apparatus, method, integrated circuit, computer program, and recording medium. For example, the present invention may be implemented as a building (room) to which the airflow formation system of the above embodiment is applied, or as a control device of the above embodiment. Furthermore, the present invention may be implemented as a control method for an airflow formation system (airflow generator, fragrance generator) executed by a computer such as the control device (control unit) of the above embodiment, or as a program for causing a computer to execute such a control method. Furthermore, the present invention may be implemented as a computer-readable non-temporary recording medium on which such a program is recorded.

[0073] Furthermore, the present invention also includes forms obtained by applying various modifications to each embodiment that a person skilled in the art could conceive, or forms realized by arbitrarily combining the components and functions of each embodiment without departing from the spirit of the present invention. [Explanation of Symbols]

[0074] 10 Airflow Forming System 20, 20a Airflow Generator 21 Blower 22 Fans 23 Piping 24 filter units 25 ducts 26 air outlets 30 Fragrance Generator 40 Control device 41 Operation reception section 42 Control Unit 43 Storage section 80 rooms 81 Ceiling 82 Wall 83 Upper space 84 Space 85 Downward space 86 beds

Claims

1. Multiple ducts arranged in parallel along a virtual plane located between the first and second spaces, A blower that blows air into the interior of the aforementioned multiple ducts, The first space is equipped with a fragrance generating device that generates fragrance, Each of the plurality of ducts is provided with an elongated outlet along the longitudinal direction of the duct on the surface facing the second space. When airflow is blown out from the outlets of each of the plurality of ducts into the second space, an induced airflow is generated between the plurality of ducts, moving from the first space to the second space. The induced airflow includes the fragrance generated by the fragrance generating device. When viewing the first space from the second space, the fragrance generating device is located in the first space in a place visible from between the multiple ducts. Airflow formation system.

2. Furthermore, the system includes a control unit that controls the intensity of the fragrance emitted by the fragrance generator. The airflow forming system according to claim 1.

3. The control unit controls the intensity of the fragrance based on the amount of fragrance generated. The airflow forming system according to claim 2.

4. The control unit controls the intensity of the fragrance based on the time interval at which the fragrance is generated. The airflow forming system according to claim 2.

5. The control unit increases the intensity of the fragrance emitted by the fragrance generator when the airflow rate of the blower increases, and decreases the intensity of the fragrance emitted by the fragrance generator when the airflow rate decreases. The airflow forming system according to claim 2.

6. The control unit stops the fragrance generator when the blower stops, and starts the fragrance generator when the blower starts. The airflow forming system according to claim 2.

7. The first space is an upper space located above the virtual plane, The second space is a lower space located below the virtual plane. The airflow forming system according to any one of claims 1 to 6.

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