Air supply device

Abstract

In an air blowing device, an intermediate nozzle (73) is disposed between a first nozzle (13a) and a second nozzle (13b), and the first nozzle (13a), the intermediate nozzle (73), and the second nozzle (13b) extend between a first inner plate (8a) and a second inner plate (8b), respectively. A first blow-out opening (14a) of the first nozzle (13a), a blow-out opening (74) of the intermediate nozzle (73), and a second blow-out opening (14b) of the second nozzle (13b) blow out air in the same direction. The first nozzle (13a) has a first closing part (80a) for closing a part of the first blow-out opening (14a), and the second nozzle (13b) has a second closing part (80b) for closing a part of the second blow-out opening (14b). The outlet (74) of the intermediate nozzle (73) is not closed.

Description

Technical Field

[0001] The present invention relates to an air supply device, and in particular to an air supply device that supplies airflow in a manner of partitioning a space between users who sit face to face. Background Art

[0002] Recently, with the outbreak of the new coronavirus, reducing the risk of infection has become a social issue. In the case of meetings or meetings, there are many opportunities for users to sit face to face across a table, and some people point out that even if users wear masks, aerosols containing viruses may leak from the gaps in the masks. Therefore, in order to reduce the risk of infection caused by aerosols, transparent partitions are usually set on the tables between users. As such a partition, for example, a transparent partition including a sterilization device has been studied (for example, Patent Document 1).

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-186300 Summary of the invention

[0006] There are small spaces such as cubicles and meeting rooms where a small number of people can sit face to face. When multiple people use such small spaces together, there is a problem of not being able to sit in peace due to concerns about aerosol droplets spread from other users.

[0007] The present invention is proposed to solve the above-mentioned problems, and its purpose is to provide a technology for suppressing the movement of aerosols and viruses between people facing each other in a specific space where multiple people can stay.

[0008] In order to solve the above-mentioned problem, an air supply device of one embodiment of the present invention is an air supply device including a first fan, a second fan, a first nozzle, an intermediate nozzle and a second nozzle, wherein the intermediate nozzle is arranged between the first nozzle and the second nozzle, the first nozzle, the intermediate nozzle and the second nozzle respectively extend between the first surface and the second surface which are different from each other, the air from the first fan is respectively transported to the first nozzle, the intermediate nozzle and the second nozzle from the first surface, the air from the second fan is respectively transported to the first nozzle, the intermediate nozzle and the second nozzle from the second surface, and the first nozzle, the intermediate nozzle and the second nozzle respectively have a blowing outlet for blowing air in the same direction. The first nozzle and the second nozzle respectively have a closing portion for closing a part of the blowing outlet. The blowing outlet of the intermediate nozzle is not closed at a portion adjacent to the closing portion.

[0009] According to the present invention, in a specific space where multiple people can stay, the movement of aerosols and viruses between people facing each other can be suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a perspective view showing a specific space in which the air supply device of this embodiment is installed.

[0011] Figure 2 It is a perspective view showing a specific space in which the air supply device of this embodiment is installed.

[0012] Figure 3A Yes means that there is Figure 2 A top view of a specific space of an air supply device.

[0013] Figure 3B Yes means that there is Figure 2 A top view of a specific space of an air supply device.

[0014] Figure 4 This is a graph showing the relationship between the length of the sealing portion and the aerosol blocking rate.

[0015] Figure 5 It means by Figure 2 A partial cross-sectional view of the flow of an air flow generated by an air supply device.

[0016] Fig. 6A It means by Figure 2 A side view of the flow of an air flow generated by an air supply device.

[0017] Figure 6B It means by Figure 2 A side view of the flow of an air flow generated by an air supply device.

[0018] Fig. 7A It means by Figure 2 A front view of the flow of air flow generated by the air supply device.

[0019] Figure 7B It means by Figure 2 A front view of the flow of air flow generated by the air supply device.

[0020] Figure 8 It means by Figure 2 A top view of the flow of airflow generated by the air supply device.

[0021] Fig. 9A It is a plan view showing a specific space in which the air supply device according to Modification 1 is installed.

[0022] Fig. 9B It is a plan view showing a specific space in which the air supply device according to Modification 2 is installed.

[0023] Fig. 9C It is a plan view showing a specific space in which the air supply device according to Modification 3 is installed.

[0024] Fig.10It is a perspective view showing a specific space in which the air supply device according to Modification 4 is installed.

[0025] Fig.11 It is a perspective view showing a specific space in which the air supply device according to Modification 5 is installed.

[0026] Description of Reference Numerals

[0027] 1 Air supply device

[0028] 2 Specific Space

[0029] 3 Bedrooms

[0030] 4 Hollow Space

[0031] 4a The first hollow space

[0032] 4b Second hollow space

[0033] 5 Floor Panel

[0034] 6 Side panels

[0035] 6a Side Plank 1

[0036] 6b Side Plank 2

[0037] 6c 3rd side plank

[0038] 6d 4th side plate

[0039] 6e 5th side panel

[0040] 6f 6th side panel

[0041] 6g 7th side plate

[0042] 6h 8th side plank

[0043] 7 Top Plate

[0044] 7a No. 1 top plate

[0045] 7b 2nd top plate

[0046] 8 Inner plate

[0047] 8a 1st inner plate

[0048] 8b 2nd inner plate

[0049] 9 Casters

[0050] 10 doors

[0051] 11. Table

[0052] 12 chairs

[0053] 12a 1st Chair

[0054] 12b 2nd chair

[0055] 13 Nozzles

[0056] 13a No. 1 nozzle

[0057] 13b No. 2 nozzle

[0058] 14 Blowing outlet

[0059] 14a No. 1 outlet

[0060] 14b Second blow outlet

[0061] 15 Fan

[0062] 15a No. 1 fan

[0063] 15b No. 2 fan

[0064] 16 Air supply port

[0065] 16a No. 1 air supply port

[0066] 16b Second air supply port

[0067] 17 Table opening

[0068] 18 Exhaust

[0069] 20 base plate

[0070] 20a 1st base plate

[0071] 20b 2nd base plate

[0072] 73 intermediate nozzle

[0073] 74 Blowing outlet

[0074] 80 closed part

[0075] 80a 1st sealing part

[0076] 80b Second sealing part

[0077] 100, 100a, 100b users

[0078] AF12, AF13, AF14 airflow

[0079] AF15 Blowing air

[0080] AF21 Attracting airflow

[0081] AF31 Face Airflow

[0082] AF33 Blocking airflow

[0083] AF35 Converging Airflow

[0084] AF41 Circulation Airflow

[0085] R1 Region

[0086] R2 Region

[0087] R3 Region

[0088] S1 Negative pressure area

[0089] S2 Negative pressure area

[0090] S3 Central Section

[0091] T1 Circulation Airflow Area

[0092] T2 Blocked airflow area

[0093] T3 Converging airflow area DETAILED DESCRIPTION

[0094] The embodiments described below all represent a preferred specific example of the present invention. Therefore, the numerical values, shapes, materials, constituent elements, the configuration positions and connection methods of the constituent elements, and the order of steps (processes) and steps shown in the following embodiments are only examples and do not limit the present invention. Therefore, among the constituent elements in the following embodiments, the constituent elements not recorded in the independent claims representing the highest concept of the present invention are described as arbitrary constituent elements. In addition, in each of the accompanying drawings, the same symbols are marked for substantially the same structures, and repeated descriptions are omitted or simplified.

[0095] (Example)

[0096] Figure 1 2 is a perspective view showing a specific space 2 in which the air supply device 1 of this embodiment is installed. Figure 1 This is a three-dimensional diagram showing a device unit as a specific space 2 in which an air supply device 1 is installed. The specific space 2 is a device unit having a space (living space 3) where at least one person can stay, and a blow-out port of the air supply device 1 is arranged on the top surface side thereof. In this embodiment, the specific space 2 is a conference room for multiple people for meetings or discussions, and can also be called a meeting room.

[0097] Specifically, the specific space 2 is a rectangular parallelepiped shell having a floor panel 5, a first side panel 6a, a second side panel 6b, a third side panel 6c, and a fourth side panel 6d collectively referred to as side panels 6, a top panel 7, a first inner panel 8a and a second inner panel 8b collectively referred to as inner panels 8, four casters 9, two doors 10, a first air supply port 16a and a second air supply port 16b collectively referred to as air supply ports 16, and an exhaust port 18. In addition, a living space 3 and a first hollow space 4a and a second hollow space 4b collectively referred to as a hollow space 4 are provided inside the specific space 2.

[0098] The floor panel 5 is a square plate material disposed on the ground side in the specific space 2 and is provided with an air supply port 16 and an air discharge port 18 .

[0099] The side panel 6 is composed of four square plates, namely the first side panel 6a, the second side panel 6b, the third side panel 6c and the fourth side panel 6d, and is erected from the four peripheral ends of the floor panel 5 to the upper part in the vertical direction. The first side panel 6a and the second side panel 6b are arranged at positions opposite to each other. The third side panel 6c is a side panel 6 provided with two doors 10, and the first side panel 6a and the second side panel 6b are connected at both ends. The fourth side panel 6d is a side panel 6 arranged at a position opposite to the third side panel 6c, and the first side panel 6a and the second side panel 6b are also connected at both ends. The top panel 7 is a square plate that covers the opening formed by erecting the side panel 6. The top panel 7 is arranged above the floor panel 5, and is equivalent to the top surface in the specific space 2 when the floor panel 5 is used as the ground in the specific space 2.

[0100] The inner plate 8 includes a first inner plate 8a and a second inner plate 8b. The inner plate 8 is a plate that divides the specific space 2 into a living space 3 where a user stays and a hollow space 4 that serves as a ventilation path of the air supply device 1 described later, and is provided in parallel with the first side plate 6a and the second side plate 6b. The first inner plate 8a is located on the first side plate 6a side on the floor panel 5, and divides the first hollow space 4a in the specific space 2. The second inner plate 8b is located on the second side plate 6b side on the floor panel 5, and divides the second hollow space 4b in the specific space 2.

[0101] The living space 3 is a space that users who use the specific space 2 can enter, exit, and stay in. More specifically, the living space 3 is composed of a floor panel 5, a third side panel 6c, a fourth side panel 6d, a top panel 7, a first inner panel 8a, a second inner panel 8b, and two doors 10. When the surface of the first inner panel 8a on the living space 3 side is referred to as the "first surface", the surface of the second inner panel 8b on the living space 3 side is referred to as the "second surface".

[0102] The hollow space 4 communicates with the living space 3 and is a space where fans 15 (first fan 15a and second fan 15b) are provided as ventilation paths of the air supply device 1. The hollow space 4 includes a first hollow space 4a and a second hollow space 4b.

[0103] The first hollow space 4a is composed of the floor panel 5, the first side panel 6a, the third side panel 6c, the fourth side panel 6d, the top panel 7 and the first inner panel 8a, and is provided with the first fan 15a. Here, by configuring the first inner panel 8a in a stepped shape, the first hollow space 4a has a space protruding toward the lower side portion.

[0104] The second hollow space 4b is composed of the floor panel 5, the second side panel 6b, the third side panel 6c, the fourth side panel 6d, the top panel 7 and the second inner panel 8b, and is provided with a second fan 15b. Here, by configuring the second inner panel 8b to be stepped, the second hollow space 4b has a space protruding toward the lower part.

[0105] Here, in this embodiment, the inner panel 8 is configured in a stepped shape, but the inner panel 8 may have any shape as long as it can arrange the fan 15 in the hollow space 4 and supply the air sent out from the fan 15 to the hollow space 4 .

[0106] The air supply port 16 is a square opening for supplying air from the outside of the specific space 2 to the living space 3 via the hollow space 4, and is provided at the lower part of the air supply surface of the fan 15 of the floor panel 5. The air supply port 16 draws air from the outside of the specific space 2 through the operation of the fan 15 described later. In addition, the air supply port 16 is square, but is not limited to this, and may also be a polygon or a circle other than a square. In addition, in the present embodiment, the air supply ports 16 (the first air supply port 16a and the second air supply port 16b) are provided at two locations so as to be located directly below the air supply surface of the fan 15 (the first fan 15a and the second fan 15b), but the air supply port 16 may also be provided so as to draw air from the outside of the specific space 2 into the fan 15.

[0107] In more detail, the air supply port 16 includes a first air supply port 16a and a second air supply port 16b. The first air supply port 16a is provided on the floor panel 5 in the first hollow space 4a and is connected to the air supply surface of the first fan 15a. The first fan 15a inhales air from the first air supply port 16a. The second air supply port 16b is provided on the floor panel 5 in the second hollow space 4b and is connected to the air supply surface of the second fan 15b. The second fan 15b inhales air from the second air supply port 16b.

[0108] The caster 9 is a fixed foot capable of lifting and moving the specific space 2. The caster 9 is provided at each of the four corners on the lower surface side of the floor panel 5. In the present embodiment, the casters 9 are provided at four locations, but the number of the casters 9 may be increased or decreased according to the load resistance.

[0109] The door 10 is a tool used by a user staying in the living space 3 to enter and exit. In the present embodiment, the door 10 is provided at two locations on the third side plate 6c. In addition, the number of doors is not limited to two, and may be one. In addition, the door 10 may be provided on the fourth side plate 6d side so that the user can enter and exit the living space 3 from both sides of the third side plate 6c side and the fourth side plate 6d side.

[0110] Figure 2 2 is a perspective view showing a specific space 2 in which the air supply device 1 is installed. Figure 21 is a perspective view showing the internal structure of a specific space 2 in which an air supply device 1 is installed. The air supply device 1 is a device that blows out flowing air from the ceiling plate 7 side to the floor plate 5 side in the living space 3 in the specific space 2. The airflow formed by the air blown out from the air supply device 1 will be described later.

[0111] Specifically, the air supply device 1 includes a first nozzle 13a (nozzle 13), a second nozzle 13b (nozzle 13), an intermediate nozzle 73, a first fan 15a, and a second fan 15b. The number of nozzles 13 in the air supply device 1 is not limited to "2", the number of intermediate nozzles 73 is not limited to "1", and the number of fans 15 is not limited to "2".

[0112] The fan 15 is arranged inside the hollow space 4, and is a device for generating airflow from the air supply port 16 through the hollow space 4 toward the first nozzle 13a, the second nozzle 13b, and the intermediate nozzle 73. The fan 15 can be, for example, a well-known turbomachine such as a centrifugal fan. The number of fans 15 provided varies depending on the specifications of the air supply volume, but in this embodiment, two fans, the first fan 15a and the second fan 15b, are provided.

[0113] The first blower 15a generates a flow of air from the first air supply port 16a to the first nozzle 13a, the second nozzle 13b, and the intermediate nozzle 73 in the first hollow space 4a. Thus, the first blower 15a supplies the air sucked from the first air supply port 16a to the first nozzle 13a, the second nozzle 13b, and the intermediate nozzle 73 via the first hollow space 4a.

[0114] The second blower 15b generates a flow of air from the second air supply port 16b to the first nozzle 13a, the second nozzle 13b, and the intermediate nozzle 73 in the second hollow space 4b. Thus, the second blower 15b supplies the air sucked from the second air supply port 16b to the first nozzle 13a, the second nozzle 13b, and the intermediate nozzle 73 via the second hollow space 4b.

[0115] Here, the first fan 15a and the second fan 15b may each include a mechanism capable of adjusting the air volume (air supply volume). The details will be described later. In this embodiment, the air volume of the first fan 15a is controlled to be equal to the air volume of the second fan 15b.

[0116] The first nozzle 13a, the intermediate nozzle 73 and the second nozzle 13b extend between the first inner plate 8a (first surface) and the second inner plate 8b (second surface). In addition, the intermediate nozzle 73 is arranged between the first nozzle 13a and the second nozzle 13b. The structure may also be that the first inner plate 8a is arranged between the first nozzle 13a, the intermediate nozzle 73, the second nozzle 13b and the first side plate 6a. In addition, it can also be said that the second inner plate 8b is arranged between the first nozzle 13a, the intermediate nozzle 73, the second nozzle 13b and the second side plate 6b.

[0117] The nozzle 13 and the intermediate nozzle 73 are respectively a kind of ventilation pipe with a square cross section into which the air transported by the fan 15 flows. The nozzle 13 and the intermediate nozzle 73 only need to be a cylindrical air passage, and are not limited to a square cross section. For example, the cross section may be an elliptical one. The air from the first fan 15a is transported from the first inner plate 8a (first surface) side via the first hollow space 4a to the first nozzle 13a, the intermediate nozzle 73 and the second nozzle 13b respectively. In addition, the air from the second fan 15b is transported from the second inner plate 8b (second surface) side via the second hollow space 4b to the first nozzle 13a, the intermediate nozzle 73 and the second nozzle 13b respectively. In addition, in the first nozzle 13a, the intermediate nozzle 73 and the second nozzle 13b, the air transported from both sides collides in the central part.

[0118] A table 11, a first chair 12a, and a second chair 12b are arranged in the living space 3. The table 11 is a tool for a user staying in the living space 3 to place a computer or documents and start working. The table 11 is fixed in a manner of abutting against the third side panel 6c and the fourth side panel 6d. The table 11 has a table opening 17 in its central portion. In addition, the table 11 may be independent of the side panel 6, or may include independent legs.

[0119] The table opening 17 is formed from the first nozzle 13a to be described later across the second nozzle 13b, and penetrates the central portion of the table 11 from the top plate 7 side to the floor panel 5 side. In more detail, the table opening 17 is a square opening for sending the airflows blown out from the first nozzle 13a, the middle nozzle 73, and the second nozzle 13b to the exhaust port 18. In addition, the table opening 17 is a square, but is not limited to this, and may also be a polygonal or elliptical shape other than a square. In addition, a punched metal plate may also be provided on the table opening 17. In this way, it is possible to prevent pens and the like from falling into the table opening 17.

[0120] The chair 12 is a chair for users who stay in the living space 3 to sit. The chair 12 includes a first chair 12a and a second chair 12b so that users can face each other across the table 11. The first chair 12a is arranged so that the backrest portion abuts against the first inner plate 8a. That is, the first chair 12a is arranged on the first inner plate 8a facing the table 11. The second chair 12b is arranged so that the backrest portion abuts against the second inner plate 8b. That is, the second chair 12b is arranged on the second inner plate 8b facing the table 11.

[0121] The exhaust port 18 is a square opening for exhausting the air in the living space 3 to the outside. The exhaust port 18 is extended from the third side plate 6c to the fourth side plate 6d, and is provided on the floor panel 5 directly below the table opening 17 in the vertical direction. In other words, the table opening 17 is provided directly above the exhaust port 18. The fan 15 starts to operate, and thereby the exhaust port 18 exhausts air from the living space 3. In addition, the exhaust port 18 is a square, but it is not limited to this, and it can also be a polygonal or elliptical shape other than a square.

[0122] Figure 3A and 3B It is a plan view showing a specific space 2 in which the air supply device 1 is installed. Figure 3A The structure of the air supply device 1 when viewed from the top plate 7 toward the floor plate 5 is shown.

[0123] like Figure 3A and Figure 2 As shown in the figure, the nozzle 13 and the intermediate nozzle 73 are respectively extended horizontally from the upper part of the first inner plate 8a to the upper part of the second inner plate 8b. At this time, the nozzle 13 and the intermediate nozzle 73 are connected to the first hollow space 4a and the second hollow space 4b at the connection point with the first inner plate 8a and the connection point with the second inner plate 8b, respectively. In addition, the first nozzle 13a, the intermediate nozzle 73 and the second nozzle 13b are arranged in parallel from one end of the first inner plate 8a to one end of the second inner plate 8b.

[0124] Here, "above the first inner plate 8a" refers to a position higher than the head of a standing person, specifically, a position at a height of more than two meters from the floor plate 5 in the living space 3. In addition, "horizontally extending" means standing in the living space 3 in a direction parallel to the floor plate 5 as the ground and the top plate 7 as the ceiling.

[0125] Figure 3B express Figure 3A The transparent structure of the upper surface of the first nozzle 13a, the second nozzle 13b, and the intermediate nozzle 73 is shown. Figure 3B It can also be said that it represents the structure of the lower surface of the first nozzle 13a, the second nozzle 13b, and the intermediate nozzle 73. Figure 3B , users 100a and 100b are shown.

[0126] like Figure 3B As shown, a first blowing outlet 14a is provided on the lower surface of the first nozzle 13a. The first blowing outlet 14a is a slit-shaped opening that is longer in the direction in which the first nozzle 13a extends. In addition, a portion of the first blowing outlet 14a is closed by the first closing portion 80a. The first closing portion 80a is, for example, provided in the central portion between the first inner plate 8a (first surface) and the second inner plate 8b (second surface). Therefore, the first blowing outlet 14a is open at both end sides of the first closing portion 80a.

[0127] In addition, a second blow outlet 14b is provided on the lower surface of the second nozzle 13b. The second blow outlet 14b is a slit-shaped opening that is longer in the direction in which the second nozzle 13b extends. In addition, a portion of the second blow outlet 14b is closed by the second closing portion 80b. The second closing portion 80b is, for example, provided in the central portion between the first inner plate 8a (first surface) and the second inner plate 8b (second surface). Therefore, the second blow outlet 14b is open on both end sides of the second closing portion 80b. The first blow outlet 14a and the second blow outlet 14b are collectively referred to as the blow outlet 14, and the first closing portion 80a and the second closing portion 80b are collectively referred to as the closing portion 80.

[0128] The blowout port 74 is provided on the lower surface of the intermediate nozzle 73. The blowout port 74 is a slit-shaped opening that is long in the direction in which the intermediate nozzle 73 extends. The intermediate nozzle 73 is not closed in the portion adjacent to the closed portion 80, that is, in the central portion between the first inner plate 8a (first surface) and the second inner plate 8b (second surface). Further, the blowout port 74 is not closed in the entire region between the first inner plate 8a (first surface) and the second inner plate 8b (second surface) of the intermediate nozzle 73.

[0129] The first outlet 14a, the second outlet 14b, and the outlet 74 are arranged to face downward. The first outlet 14a, the second outlet 14b, and the outlet 74 blow out the air that has flowed into the nozzle 13 or the intermediate nozzle 73 from the top plate 7 side toward the floor plate 5. That is, the first outlet 14a, the second outlet 14b, and the outlet 74 blow out air in the same direction.

[0130] Here, "toward downward" means facing the floor panel 5 in the living space 3. That is, the blowout port 14 is provided on the surface of the square nozzle 13 that faces the floor panel 5. In addition, the blowout port 14 is a square opening formed in such a way that the direction in which the blowout port is provided is the long side and the direction parallel to the inner panel 8 is the short side. One blowout port 14 is provided for each nozzle 13, but due to the presence of the closed portion 80 in the central portion, it is actually provided at two locations at both ends in the long side direction.

[0131] The outlets 14 of each nozzle 13 are arranged on the same horizontal plane when a certain horizontal plane is assumed. That is, in the living space 3, the outlets 14 of each nozzle 13 are arranged at the same height from the floor panel 5. In addition, the outlets 74 of the intermediate nozzle 73 are also arranged in the same manner as the outlets 14.

[0132] The exhaust port 18 exhausts the air blown out from the blowout port 14 and the blowout port 74. When the floor panel 5 is viewed from above, the exhaust port 18 is provided so as to straddle the first closing portion 80a of the first nozzle 13a and the second closing portion 80b of the second nozzle 13b (see FIG. Figure 3B ).

[0133] Below, use Figure 4 The length of the closing portion 80 in each nozzle 13 , that is, the length of the first closing portion 80 a in the first nozzle 13 a or the length of the second closing portion 80 b in the second nozzle 13 b will be described.

[0134] Figure 4 It is a graph showing the relationship between the length of the sealing portion 80 and the aerosol blocking rate. Figure 4 The horizontal axis represents the length of the sealing portion 80 relative to the entire opening, and the vertical axis represents the face-to-face aerosol blocking rate. At this time, the minimum distance between the face-to-face persons is 560 mm. In addition, for each nozzle 13, the combination of the blowing outlet 14 and the sealing portion is referred to as the "entire opening". Thus, if the sealing portion 80 seals about 25% to 75% of the entire opening, more than 95% of the aerosol directed toward the face-to-face person can be blocked. Therefore, the length of the sealing portion 80 relative to the entire opening is preferably about 25% to 75%. In addition, the blowing outlet 14 and the blowing outlet 74 are not limited to continuous square openings, and may be, for example, round holes or discontinuous square openings.

[0135] Next, refer to Figure 5 , the surface airflow AF31 generated by the air supply device 1 is described. Figure 5 1 is a partial cross-sectional view showing the flow of airflow generated by the air supply device 1. The operation of the air supply device 1 starts when the first fan 15a and the second fan 15b are operated. When the first fan 15a and the second fan 15b are operated, air outside the specific space 2 is sucked in from the first air supply port 16a and the second air supply port 16b, and the blown airflow AF15 is blown out from the first blowout port 14a of the first nozzle 13a, the second blowout port 14b of the second nozzle 13b, and the blowout port 74 of the intermediate nozzle 73, respectively.

[0136] When the blown airflow AF15 is blown to the living space 3, the air in the space around the blown airflow AF15 is sucked by the blown airflow AF15, and a negative pressure area S1 is generated in the space between the first nozzle 13a and the intermediate nozzle 73 and in the space between the intermediate nozzle 73 and the second nozzle 13b. Here, negative pressure (also called hidden pressure) refers to a state where the air pressure is lower than the surrounding area. That is, the negative pressure area S1 is an area where the air pressure is lower than the surrounding area.

[0137] When the negative pressure area S1 is generated, the force that will eliminate the negative pressure acts, and the flow of air (suction airflow AF21) for eliminating the negative pressure area S1 is generated from the space around the nozzle 13 and the intermediate nozzle 73. In addition, the space between the first nozzle 13a and the intermediate nozzle 73, and the space between the intermediate nozzle 73 and the second nozzle 13b through which the suction airflow AF21 flows are respectively referred to as guide air paths.

[0138] In a limited space such as the living room space 3, the air in the space around the suction airflow AF21 (the space near the inlet of the guide air path) is sucked by the suction airflow AF21. As a result, a negative pressure area S2 is generated in the space between the nozzle 13 and the top plate 7 and in the space between the intermediate nozzle 73 and the top plate 7. As a result, a flow of air (circulation airflow AF41) for eliminating the negative pressure area S2 is generated. That is, a return flow path is formed as a path for introducing the air sucked into the guide air path via the negative pressure area S2, and the air is sucked into the guide air path.

[0139] The blown airflow AF15 and the suction airflow AF21 overlap in the living space 3 to form a surface airflow AF31. The surface airflow AF31 is used to move the aerosol and virus in the entire living space 3 from the top plate 7 to the floor panel 5 side, which can improve the Figure 2 The exhaust port 18 shown in the figure discharges the aerosol and the virus to the outside of the specific space 2. In addition, the surface airflow AF31 more reliably suppresses the movement of the aerosol and the virus between the surfaces.

[0140] Fig. 6A and Figure 6B It is a side view showing the flow of airflow generated by the air blowing device 1 . Fig. 6A It is a cross-sectional view of the specific space 2 at the position where the intermediate nozzle 73 is arranged.

[0141] When the operation of the blower 15 is started, the air outside the specific space 2 becomes the airflow AF12 and is sucked from the air supply port 16. The air (airflow AF12) sucked from the air supply port 16 is transported as the airflow AF13 inside the hollow space 4, and flows from both sides of the intermediate nozzle 73 to the inside of the intermediate nozzle 73 as the airflow AF14. Here, the airflow AF14 is supplied from both ends of the nozzle 13 and the intermediate nozzle 73 at the same air volume.

[0142] The air (airflow AF14) flowing into the middle nozzle 73 collides with the central portion S3 and is blown out from the blow-out port 74 downward, that is, toward the floor panel 5, as the blow-out airflow AF15. At this time, the blow-out airflow AF15 is blown out at a constant wind speed in all regions R1. The blow-out airflow AF15 overlaps with the above-mentioned suction airflow AF21 and flows in the living space 3 toward the floor panel 5 as the above-mentioned surface airflow AF31. That is, the surface airflow AF31 is an airflow with a strong straightness that blows down on the chair 12.

[0143] The surface airflow AF31 toward the floor panel 5 is reflected by the chair 12 and flows as the circulation airflow AF41 along the first inner panel 8a or the second inner panel 8b toward the ceiling panel 7. The circulation airflow AF41 is an airflow for stably forming the surface airflow AF31 in the living space 3.

[0144] Figure 6B FIG. 2 is a cross-sectional view of the specific space 2 at the position where the first nozzle 13a is arranged. Figure 6B In the embodiment, the positions of the second chair 12b and the first chair 12a are also the same as Fig. 6A In the same way.

[0145] When the operation of the blower 15 is started, the air outside the specific space 2 becomes the airflow AF12 and is sucked from the air supply port 16. The air (airflow AF12) sucked from the air supply port 16 is transported inside the hollow space 4 as the airflow AF13, and flows from both sides of the first nozzle 13a to the inside of the first nozzle 13a as the airflow AF14.

[0146] The air (airflow AF14) flowing into the first nozzle 13a collides with the central portion S3 and is blown out from the two first outlets 14a downward, that is, toward the floor panel 5 as the blown airflow AF15. Here, by providing the first closing portion 80a on the first nozzle 13a, the total length of the two first outlets 14a is shorter than the length of the outlet 74 of the middle nozzle 73. Figure 6B The wind pressure ratio of the airflow AF15 blown out from the two first blow-out ports 14a shown in FIG. Fig. 6A The wind pressure of the blowout airflow AF15 blown out of the blowout outlet 74 shown is high. As a result, Figure 6B The wind speed of the blown airflow AF15 in the region R2 shown is higher than that in the above Fig. 6A The wind speed of the blowout airflow AF15 in the illustrated region R1 is high.

[0147] because Figure 6B The wind speed of the blown air flow AF15 in the region R2 is shown as Fig. 6A The difference in wind speed of the blown air flow AF15 in the region R1 is shown in FIG. Fig. 6AThe blocking air flow AF33 shown is blown in below the intermediate nozzle 73 .

[0148] Specifically, Fig. 6A The region R3 in the Figure 6B The area corresponding to the portion where the first sealing portion 80a is provided. Figure 6B ) Flow into area R3 (refer to Fig. 6A ) below and flows to table 11.

[0149] Since the blocking airflow AF33 flows from the top plate 7 toward the floor plate 5 between the first chair 12a and the second chair 12b, it is possible to improve the aerosol blocking performance between the user sitting on the first chair 12a and the user sitting on the second chair 12b.

[0150] The blocking airflow AF33 toward the floor panel 5 passes through the table opening 17 as the converging airflow AF35, and is discharged from the discharge port 18 to the outside of the specific space 2 (see Fig. 6A ). That is, the convergent airflow AF35 is an airflow for discharging the aerosol that sinks in the blocking airflow AF33.

[0151] Fig. 7A and Figure 7B 1 is a front view showing the flow of airflow generated by the air supply device 1. More specifically, Fig. 7A yes Fig. 6A A-A' line or Figure 6B That is, Fig. 7A 2 is a cross-sectional view of a specific space 2 cut along the vertical direction on the second chair 12b. Fig. 7A In the figure, for reference, the table 11 and the feet of the user 100b which should not be shown are also shown.

[0152] The blown airflow AF15 is blown downward from the first blow outlet 14a of the first nozzle 13a, the blown airflow AF15 is blown downward from the blow outlet 74 of the middle nozzle 73, and the blown airflow AF15 is blown downward from the second blow outlet 14b of the second nozzle 13b. Based on these blown airflows AF15, a surface airflow AF31 is formed near the head of the second user 100b. In addition, the surface airflow AF31 is reflected by the second chair 12b, thereby forming a circulating airflow AF41 that flows upward.

[0153] Figure 7B yes Fig. 6A The C-C' line or Figure 6B That is, Figure 7B It is a cross-sectional view obtained by cutting the specific space 2 along the vertical direction on the table 11.

[0154] The blown airflow AF15 is blown downward from the blowout port 74 of the middle nozzle 73. On the other hand, since the first nozzle 13a is provided with the first blocking portion 80a and the second nozzle 13b is provided with the second blocking portion 80b, the blown airflow AF15 is not blown from these nozzles 13.

[0155] In addition, as described above, region R2 (refer to Figure 3B and Figure 6B ) moves downward in front of the second user 100b as the blocking airflow AF33. The blocking airflow AF33 moves downward from the table 11 through the table opening 17 ( Figure 7B The liquid (not shown) flows toward the floor panel 5 and is discharged to the outside through the discharge port 18.

[0156] Figure 8 1 is a top view showing the flow of airflow generated by the air supply device 1. Figure 8 As shown, a surface airflow AF31 with high straightness directed toward the chair 12 is formed by the air supply device 1. In addition, a circulating airflow AF41 is formed on the back of the chair 12 and the two side surfaces of the chair 12, which returns to the top plate 7 side. The area through which the circulating airflow AF41 flows is represented as a circulating airflow area T1. At a position near the face of the user 100 (user 100a, 100b) on the chair 12, a blocking airflow AF33 is formed that is blown down strongly toward the floor panel 5. The area through which the blocking airflow AF33 flows is represented as a blocking airflow area T2. In the center of the living space 3, a convergent airflow AF35 is formed that blows down toward the center toward the floor panel 5 and is discharged from the exhaust port 18. The area through which the convergent airflow AF35 flows is represented as a convergent airflow area T3.

[0157] (Variation Example)

[0158] Modifications of the above-described embodiment will be described below as Modifications 1 to 5. At this time, repeated descriptions of the contents described in the embodiment will be appropriately omitted, and differences from the embodiment will be mainly described.

[0159] Figures 9A to 9C 2 is a top view showing a specific space 2 in which the air supply device 1 of Modifications 1 to 3 is installed. Figure 3B In the same way.

[0160] (Variant 1)

[0161] Fig. 9A1 is a top view showing the structure of the air supply device 1 of Modification 1. In the previous air supply device 1, an intermediate nozzle 73 is arranged between the first nozzle 13a and the second nozzle 13b. On the other hand, in the present invention, as long as the sealing portion 80 is provided on the nozzles at both ends such as the first nozzle 13a and the second nozzle 13b, the number of the intermediate nozzles 73 arranged between these nozzles 13 is not limited to "1" and can also be multiple.

[0162] exist Fig. 9A In the illustrated modification 1, three intermediate nozzles 73 are arranged between the first nozzle 13 a and the second nozzle 13 b .

[0163] (Variant 2)

[0164] Fig. 9B 1 is a top view showing the structure of the air supply device 1 of the second modification. In the previous air supply device 1, one first nozzle 13a and one second nozzle 13b are provided. On the other hand, in the present invention, the number of the first nozzle 13a and the second nozzle 13b is not limited to "1", and may be multiple. Fig. 9B In the modification 2 shown, one intermediate nozzle 73 is arranged between two first nozzles 13a and two second nozzles 13b. In addition, the number of the first nozzles 13a and the number of the second nozzles 13b may be different. In addition, the modification 1 and the modification 2 may be combined to arrange a plurality of intermediate nozzles 73 between a plurality of first nozzles 13a and a plurality of second nozzles 13b.

[0165] (Variant 3)

[0166] Fig. 9C 1 is a top view showing the structure of the air supply device 1 of the modification 3. In the previous air supply device 1, the sealing portion 80 is provided in the central portion of the nozzle 13, that is, the central portion between the first inner plate 8a and the second inner plate 8b. On the other hand, in the present invention, the sealing portion 80 may be provided not in the central portion of the nozzle 13 but in a portion (position) deviated from the center. Fig. 9C In the third variation shown, the sealing portion 80 is provided at a position closer to the second chair 12b than the first chair 12a in the nozzle 13. That is, in the present invention, the sealing portion 80 only needs to be provided between the first user 100a sitting on the first chair 12a and the second user 100b sitting on the second chair 12b.

[0167] (Variant 4)

[0168] Fig.101 is a three-dimensional diagram showing a specific space 2 in which an air supply device 1 of a modified example 4 is installed. The air supply device 1 of this embodiment includes a pair of chairs 12 in the specific space 2 on which a user 100 can sit facing each other across a table 11, but the air supply device 1 of the modified example 4 is used on the assumption that the user 100 is standing. Therefore, in the air supply device 1 of the modified example 4, the chairs 12 are not arranged in the specific space 2, but the table 11 on which the user 100 can face each other in a standing state is included. Except for this, the structure and control method of the air supply device 1 of the modified example 4 are the same as those of the air supply device 1 of the embodiment.

[0169] The table 11 of the modification example 4 is a tool for a user 100 (not shown) staying in the living space 3 to place a personal computer or documents and start working in a standing state. The table 11 is fixed in a manner of abutting against the third side plate 6c and the fourth side plate 6d. The table 11 has a table opening 17 in its central part. In addition, the table 11 can be independent of the side plate 6, and can also include independent legs.

[0170] The air supply port 16 is a square opening for supplying air from the outside of the specific space 2 to the living space 3, and is provided on the side plate 6 (the first side plate 6a and the second side plate 6b). The air supply port 16 draws air from the outside of the specific space 2 by the operation of the fan 15. In more detail, the air supply port 16 has a first air supply port 16a and a second air supply port 16b. The first air supply port 16a is provided on the first side plate 6a in the first hollow space 4a. The first air supply port 16a draws air from the outside of the specific space 2 into the first hollow space 4a by the operation of the first fan 15a.

[0171] The second air supply port 16b is provided on the second side plate 6b in the second hollow space 4b. When the second fan 15b is operated, the second air supply port 16b draws air from the outside of the specific space 2 into the second hollow space 4b.

[0172] The outlet 18 is a square opening for discharging air in the living space 3 to the outside. The outlet 18 extends from the third side plate 6c to the fourth side plate 6d and is provided on the floor plate 5 directly below the table opening 17 in the vertical direction.

[0173] That is, the exhaust port 18 is provided on a different surface from the first air supply port 16a and the second air supply port 16b. When the fan 15 starts to operate, the exhaust port 18 exhausts air from the living space 3. In addition, the exhaust port 18 is a square, but is not limited to this, and may be a polygonal or elliptical shape other than a square.

[0174] (Variant 5)

[0175] Fig.111 is a perspective view showing a specific space 2 in which an air supply device 1 of a modified example 5 is installed. In the air supply device 1 of this embodiment, the specific space 2 is a rectangular parallelepiped housing, which is a closed living space 3 composed of a floor panel 5, a side panel 6, a top panel 7, an inner panel 8, casters 9, a door 10, an air supply port 16, and an exhaust port 18. On the other hand, in the air supply device 1 of the modified example 5, since there is no wall separating the living space 3 from the inside and the outside, the living space 3 becomes an open space. That is, the air supply device 1 is used in an open space.

[0176] The first hollow space 4a is composed of the first bottom plate 20a, the first side plate 6a, the fifth side plate 6e, the sixth side plate 6f, the first top plate 7a and the first inner plate 8a. A first fan 15a is provided inside the first hollow space 4a. The first hollow space 4a has a predetermined space below the seat portion of the first chair 12a by configuring the first inner plate 8a in a stepped shape.

[0177] The second hollow space 4b is composed of the second bottom plate 20b, the second side plate 6b, the seventh side plate 6g, the eighth side plate 6h, the second top plate 7b and the second inner plate 8b. A second fan 15b is provided inside the second hollow space 4b. The second hollow space 4b has a predetermined space below the seat portion of the second chair 12b by configuring the second inner plate 8b to be stepped.

[0178] The bottom plate 20 is a square plate disposed at the lower side in the hollow space 4. The bottom plate 20 includes a first bottom plate 20a and a second bottom plate 20b. The first bottom plate 20a is a panel constituting the bottom side of the first hollow space 4a. The second bottom plate 20b is a panel constituting the bottom side of the second hollow space 4b.

[0179] The first side plate 6a and the second side plate 6b are the same as before. On the other hand, instead of the third side plate 6c and the fourth side plate 6d, the fifth side plate 6e to the eighth side plate 6h are included. These side plates 6 (6a, 6b, 6e, 6f, 6g, 6h) are composed of square plates. In addition, these side plates 6 are erected from the outer peripheral end of the bottom plate 20 to the upper side in the vertical direction, forming the side portion of the hollow space 4.

[0180] The fifth side plate 6e is a side plate 6 constituting the first hollow space 4a, and connects the first side plate 6a and the first inner plate 8a. The sixth side plate 6f is a side plate 6 constituting the first hollow space 4a, which is arranged at a position opposite to the fifth side plate 6e, and connects the first side plate 6a and the first inner plate 8a. The first side plate 6a is a side plate 6 constituting the first hollow space 4a, and connects the fifth side plate 6e and the sixth side plate 6f.

[0181] The 7th side plate 6g is a side plate 6 constituting the second hollow space 4b, and connects the 2nd side plate 6b and the 2nd inner plate 8b. The 8th side plate 6h is a side plate 6 constituting the second hollow space 4b, which is arranged at a position opposite to the 7th side plate 6g, and connects the 2nd side plate 6b and the 2nd inner plate 8b. The 2nd side plate 6b is a side plate 6 constituting the second hollow space 4b, and connects the 7th side plate 6g and the 8th side plate 6h.

[0182] The top plate 7 is a square plate that covers the opening of the hollow space 4 formed by vertically arranging the side plates 6 and the inner plate 8. The top plate 7 is arranged above the bottom plate 20 and includes a first top plate 7a and a second top plate 7b. The first top plate 7a is a panel that constitutes the upper surface side of the first hollow space 4a. The second top plate 7b is a panel that constitutes the upper surface side of the second hollow space 4b.

[0183] The inner panel 8 includes a first inner panel 8a and a second inner panel 8b. The inner panel 8 is a plate material constituting the hollow space 4 as the ventilation path of the air supply device 1, and is provided in parallel with the first side panel 6a and the second side panel 6b.

[0184] The first inner plate 8a is the inner plate 8 constituting the first hollow space 4a, is provided on the first bottom plate 20a in parallel with the first side plate 6a, and connects the fifth side plate 6e and the sixth side plate 6f.

[0185] The second inner plate 8b is the inner plate 8 constituting the second hollow space 4b, and is provided on the second bottom plate 20b in parallel with the second side plate 6b, connecting the seventh side plate 6g and the eighth side plate 6h.

[0186] The first nozzle 13a, the intermediate nozzle 73 and the second nozzle 13b extend between the first inner plate 8a (first surface) and the second inner plate 8b (second surface), respectively. In addition, the intermediate nozzle 73 is arranged between the first nozzle 13a and the second nozzle 13b. Such a structure is the same as before.

[0187] (Effects, etc.)

[0188] According to the present embodiment, by providing the sealing portion 80 on the nozzle 13, the face airflow AF31, the blocking airflow AF33, the convergent airflow AF35, and the circular airflow AF41 are formed, so that the movement of aerosols and viruses between people facing each other can be suppressed in the specific space 2 where multiple people can stay. In addition, since the movement of aerosols and viruses between people facing each other can be suppressed, safety and peace of mind can be provided in a small space. In addition, since the sealing portion 80 is provided on the first nozzle 13a and the second nozzle 13b respectively, and the sealing portion 80 is not provided on the intermediate nozzle 73, the wind speed of the blowout airflow AF15 from the first blowout port 14a and the second blowout port 14b can be made faster than the wind speed of the blowout airflow AF15 from the blowout port 74. In addition, since the wind speed of the blowout airflow AF15 from the first blowout port 14a and the second blowout port 14b is faster than the wind speed of the blowout airflow AF15 from the blowout port 74, the blocking airflow AF33 can be formed.

[0189] Since the sealing portion 80 is provided at the central portion of the first inner plate 8a and the second inner plate 8b, a convergent airflow AF35 can be formed at the central portion. In addition, the air from the first fan 15a is respectively transported to the first nozzle 13a, the intermediate nozzle 73 and the second nozzle 13b via the first hollow space 4a, so that air can be supplied to the first nozzle 13a, the intermediate nozzle 73 and the second nozzle 13b respectively.

[0190] Furthermore, since the air from the second blower 15b is sent to the first nozzle 13a, the intermediate nozzle 73, and the second nozzle 13b via the second hollow space 4b, the air can be supplied to the first nozzle 13a, the intermediate nozzle 73, and the second nozzle 13b.

[0191] In addition, since the first fan 15a sucks air from the first air supply port 16a, air can be supplied to the first hollow space 4a. In addition, since the second fan 15b sucks air from the second air supply port 16b, air can be supplied to the second hollow space 4b. In addition, when the floor panel 5 is viewed from above, the exhaust port 18 is provided on the floor panel 5 in a manner spanning the closed portion 80, so that the convergent airflow AF35 can be discharged from the exhaust port 18. In addition, since the table opening 17 is provided directly above the exhaust port 18, the convergent airflow AF35 can be discharged from the exhaust port 18.

[0192] An overview of one embodiment of the present invention is as follows.

[0193] (Item 1)

[0194] An air supply device (1) comprising: a first fan (15a), a second fan (15b), a first nozzle (13a), an intermediate nozzle (73) and a second nozzle (13b)

[0195] The intermediate nozzle (73) is arranged between the first nozzle (13a) and the second nozzle (13b).

[0196] The first nozzle (13a), the intermediate nozzle (73) and the second nozzle (13b) extend between the first surface and the second surface which are different from each other.

[0197] The air from the first fan (15a) is respectively delivered from the first surface to the first nozzle (13a), the intermediate nozzle (73) and the second nozzle (13b).

[0198] The air from the second fan (15b) is respectively delivered from the second surface to the first nozzle (13a), the intermediate nozzle (73) and the second nozzle (13b).

[0199] The first nozzle (13a), the intermediate nozzle (73) and the second nozzle (13b) respectively have air outlets (14, 74) that blow air in the same direction.

[0200] The first nozzle (13a) and the second nozzle (13b) each have a closing portion (80) for closing a portion of the blowing outlet (14).

[0201] The blowing outlet (74) of the intermediate nozzle (73) is not closed at a portion adjacent to the closing portion (80).

[0202] (Item 2)

[0203] In the air supply device (1) according to item 1, the sealing portion (80) of each of the first nozzle (13a) and the second nozzle (13b) is provided at a central portion between the first surface and the second surface,

[0204] The blowing outlet (74) of the intermediate nozzle (73) is not closed at a central portion between the first surface and the second surface.

[0205] (Item 3)

[0206] The air supply device (1) as described in item 1 or 2 further comprises a first inner plate (8a), a second inner plate (8b), a first side plate (6a) and a second side plate (6b),

[0207] The first surface is the surface of the first inner plate (8a),

[0208] The first inner plate (8a) is disposed between each of the first nozzles (13a), the intermediate nozzle (73), the second nozzle (13b) and the first side plate (6a).

[0209] A first hollow space (4a) is provided between the first inner plate (8a) and the first side plate (6a).

[0210] The air from the first fan (15a) is respectively delivered to the first nozzle (13a), the intermediate nozzle (73) and the second nozzle (13b) via the first hollow space (4a).

[0211] The second surface is the surface of the second inner plate (8b),

[0212] The second inner plate (8b) is disposed between each of the first nozzle (13a), the intermediate nozzle (73), the second nozzle (13b) and the second side plate (6b).

[0213] A second hollow space (4b) is provided between the second inner plate (8b) and the second side plate (6b).

[0214] The air from the second fan (15b) is respectively delivered to the first nozzle (13a), the intermediate nozzle (73), and the second nozzle (13b) via the second hollow space (4b).

[0215] (Item 4)

[0216] In the air supply device (1) according to item 3, the first hollow space (4a) has a first air supply port (16a),

[0217] The first fan (15a) draws air from the first air supply port (16a).

[0218] The second hollow space (4b) has a second air supply port (16b).

[0219] The second fan (15b) draws air from the second air supply port (16b).

[0220] (Item 5)

[0221] The air supply device (1) as described in any one of items 1 to 4, further comprising a floor panel (5),

[0222] The floor panel (5) has an outlet (18) for discharging the air blown out from the respective outlets (14, 74) of the first nozzle (13a), the intermediate nozzle (73) and the second nozzle (13b).

[0223] When the floor panel (5) is viewed from above, the discharge port (18) is provided so as to straddle the closing portion (80a) of the first nozzle (13a) and the closing portion (80b) of the second nozzle (13b).

[0224] (Item 6)

[0225] The air supply device (1) as described in item 5 further comprises a table (11),

[0226] The table (11) has a table opening (17),

[0227] The table opening (17) is arranged directly above the discharge port (18).

[0228] The present invention has been described above based on the embodiments. Those skilled in the art should understand that the embodiments are exemplary, and the combination of various components or various processing processes may have various modifications, and these modifications are also within the scope of the present invention.

Claims

1. An air supply device, comprising a first fan, a second fan, a first nozzle, an intermediate nozzle and a second nozzle, characterized in that: The intermediate nozzle is arranged between the first nozzle and the second nozzle. The first nozzle, the intermediate nozzle and the second nozzle extend between the first surface and the second surface which are different from each other. The air from the first fan is delivered from the first surface to the first nozzle, the intermediate nozzle, and the second nozzle, respectively. The air from the second fan is respectively delivered from the second surface to the first nozzle, the intermediate nozzle and the second nozzle. The first nozzle, the middle nozzle, and the second nozzle each have a blowout port for blowing air in the same direction. The first nozzle and the second nozzle each have a closing portion that closes a portion of the blowing outlet. The blowing outlet of the intermediate nozzle is not closed at a portion adjacent to the closing portion.

2. The air supply device according to claim 1, characterized in that: The sealing portion of each of the first nozzle and the second nozzle is provided at a central portion between the first surface and the second surface. The blowing outlet of the intermediate nozzle is not closed at a center portion between the first surface and the second surface.

3. The air supply device according to claim 1, characterized in that: It also includes a first inner panel, a second inner panel, a first side panel and a second side panel, The first surface is a surface of the first inner panel, The first inner plate is disposed between each of the first nozzle, the middle nozzle, the second nozzle and the first side plate. A first hollow space is provided between the first inner plate and the first side plate, The air from the first fan is respectively delivered to the first nozzle, the intermediate nozzle, and the second nozzle via the first hollow space. The second surface is a surface of the second inner plate, The second inner plate is disposed between the first nozzle, the middle nozzle, the second nozzle and the second side plate. A second hollow space is provided between the second inner plate and the second side plate, The air from the second fan is respectively sent to the first nozzle, the intermediate nozzle, and the second nozzle via the second hollow space.

4. The air supply device according to claim 3, characterized in that: The first hollow space has a first air supply port, The first fan draws air from the first air supply port. The second hollow space has a second air supply port, The second fan draws air from the second air supply port.

5. The air supply device according to claim 1, characterized in that: Also includes floor panels, The floor panel has an outlet for discharging the air blown out from the outlets of the first nozzle, the middle nozzle, and the second nozzle, respectively. When the floor panel is viewed from above, the discharge port is provided so as to straddle the closing portion of the first nozzle and the closing portion of the second nozzle.

6. The air supply device according to claim 5, characterized in that: A desk is also included. The table has a table opening, The table opening is arranged directly above the discharge opening.

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