JP2023098051A - Air curtain suction device, air curtain generation device including the same, and desk - Google Patents

Abstract

To provide an air curtain suction device for sucking an ascending air curtain and inactivating sucked gas.SOLUTION: An air curtain suction device 20 includes: a suction device casing 210 that is longitudinal in a lateral width direction of an air curtain; an ultraviolet irradiation device 250; a discharge fan 260; a hood 270; and an illuminating device 280. The suction device casing 210 includes: suction ports 203, 204 that are provided on a lower surface 201 and are longitudinal in the lateral width direction of the air curtain; a discharge port 205 provided on an upper surface 202; and a first flow passage 206 and a second flow passage 207 that are bent and connect the suction ports 203, 204 and the discharge port 205. The ultraviolet irradiation device 250 irradiates the first flow passage 206 and the second flow passage 207 with light. The discharge fan 260 releases air in the flow passages from the discharge port 205.SELECTED DRAWING: Figure 3

Description

TECHNICAL FIELD The present invention relates to an air curtain suction device that inactivates bacteria, viruses, etc. contained in droplets sucked by an air curtain and ventilates, an air curtain generator, and a desk equipped with the same.

In recent years, due to the influence of the corona disaster, transparent partitions and curtains have been placed on the tabletops in restaurants and conference rooms. However, the partition does not disinfect or sterilize the virus in the droplets, but it prevents the droplets from scattering to the other side, so it is necessary to disinfect or sterilize the droplets attached to the partition after use. . In addition, there is a possibility that the droplets collided with the partition and repelled may float in the room.

The use of air curtains has been considered as a means of solving such partition problems.
Patent Document 1 discloses a suction unit having a hollow suction port that sucks air containing droplets, a droplet removal unit that removes droplets from the air, a blowout unit that blows out air from which droplets have been removed, and a suction unit. An air purifier is disclosed that includes a blower section that blows air from a mouth to a blower outlet, and that blows airflow downward from the blower section. A filter, an ultraviolet irradiation device, an ozone generator, an oxidation catalyst purification device, an antiseptic solution, and the like are listed as the droplet removal unit.
Patent Document 2 discloses an air supply unit having a plurality of air supply nozzles that supply air whose cross-sectional area increases as it goes upward, and an exhaust port that is arranged above the air supply nozzles and opens downward. An infectious disease control ventilation system is disclosed that includes an exhaust section and a plurality of airflow guides.

Patent No. 6908313 Patent No. 6932823

The air purifier of Patent Document 1 blows airflow downward, and the airflow that cannot be sucked from the suction port collides with the desk and scatters. Therefore, it cannot be said that it is suitable for use as a desk for arranging food and the like. Even if all the airflow can be sucked in, the user cannot get rid of the anxiety about whether all the airflow is sucked through the suction port.
The ventilation system for combating infectious diseases in Patent Document 2 blows an air current upward, but there is no description of the treatment of air containing droplets. For example, even if the droplet removal unit of Patent Document 1 is provided in the infectious disease countermeasure ventilation system of Patent Document 2, the droplet removal unit is provided above the user, so the safety for the user is solved. not a thing
SUMMARY OF THE INVENTION It is an object of the present invention to solve such problems and to provide an air curtain suction device that can be easily attached to a desk or the like, and an air curtain generator having the same.

The air curtain suction device of the present invention is an air curtain suction device that sucks an ascending air curtain, deactivates the sucked gas, and collects the gas that spreads in the longitudinal and lateral directions of the air curtain. The suction device housing has a suction device housing, a lighting device, an ultraviolet irradiation device, and an exhaust fan. and a curved or bent flow path connecting the suction port and the discharge port, the ultraviolet irradiation device irradiates the flow path, and the discharge fan is provided in the flow path of air is discharged from the outlet.
The air curtain suction device of the present invention collects the gas that spreads in the front, back, and width directions of the air curtain, passes the collected gas through the flow path in the suction device housing, inactivates it with ultraviolet rays, and discharges it from the discharge port. It is something to do. Therefore, it is possible to prevent scattering of droplets generated by conversations of a plurality of users, and even if viruses or the like are contained in droplets of users, they can be inactivated and ventilated. Further, since the air curtain suction device of the present invention is equipped with a lighting device, it also functions as lighting for the user.

In the air curtain suction device of the present invention, it is preferable that the flow path of the suction device housing is formed by an ultraviolet-transmitting wind direction plate provided in the suction device housing. In this case, since the entire channel can be irradiated with the ultraviolet irradiation device, viruses and the like can be inactivated more reliably.
In the air curtain suction device of the present invention, the suction device housing has two parallel suction ports and a discharge port, and the flow path has one of the suction port and the discharge port. It is preferable to have a connecting first channel and a second channel connecting the other suction port and the discharge port. When the air curtain rises, even if the air curtain spreads in the front-rear direction, the air can be efficiently sucked. Moreover, it is preferable to simultaneously attract two air curtains generated substantially in parallel.
In the air curtain suction device of the present invention, it is preferable that the ultraviolet irradiation device irradiates the flow path from below the suction device housing. In this case, the possibility of exposing the user to ultraviolet light is reduced.
Preferably, in the air curtain suction device of the present invention, a photocatalyst is provided downstream of the flow path. In this case, viruses and the like can be inactivated more efficiently.
In the air curtain suction device of the present invention, it is preferable that the illumination device is provided below the housing for the suction device and emits light downward.

An air curtain generating device of the present invention is an air curtain generating device comprising a blow device for generating an ascending air curtain and an air curtain suction device of the present invention, wherein the blow device is sucked by the air curtain suction device. The wind speed of the air curtain immediately before the air curtain is set to be 0.20 m/s or more. When the wind velocity of the air curtain immediately before being sucked by the air curtain suction device is 0.20 m/s or more, the straightness of the air curtain can be ensured, and suction by the air curtain suction device can be performed efficiently.
Preferably, in the air curtain generating device of the present invention, the blowing device generates two substantially parallel rising air curtains. In this case, the user's droplets can be efficiently taken into the air curtain.
In the air curtain generator of the present invention, it is preferable that the total volume of air discharged from the outlet of the air curtain suction device is set to be larger than the total volume of air generated from the blow device. In this case, it is possible to more reliably suck the gas spreading in the front, rear, and width directions of the rising air curtain. In addition, it is possible to suck in droplets floating in the surroundings that could not be taken in by the air curtain, improving the ventilation purification function.
A desk of the present invention is characterized by comprising the air curtain generator of the present invention. Since the air curtain generating device of the present invention raises the air curtain that has captured droplets and the like, there is no risk that the air current that cannot be sucked by the air curtain sucking device will collide with the table and scatter. Therefore, it is suitable for desks such as dining tables where food and drink are handled.

Since the air curtain suction device of the present invention can efficiently collect the air curtain that spreads in the front-rear and width directions as it rises, it is possible to prevent scattering of droplets generated by conversations among a plurality of users. In addition, since the collected gas is passed through the flow path in the housing for the suction device, it is inactivated by ultraviolet rays, and is discharged from the exhaust port, so even if the user's droplets contain viruses, etc., they are inactivated. can be ventilated. In particular, even if the droplets do not contain viruses or the like, the user can feel secure. Furthermore, the air curtain suction device can also be used as a lighting fixture. Thus, the air curtain generator provided with the air curtain suction device of the present invention is preferably used for a desk or table for eating and drinking.

1a and 1b are a front view and a side view, respectively, of an embodiment of the air curtain generator of the present invention. 2a is a plan view showing a blowing device of the air curtain generating device of FIG. 1, and FIG. 2b is a plan view showing another embodiment of a blowing device that can be used in the air curtain generating device of FIG. 3a and 3b are a front view and a schematic sectional view taken along line XX showing an air curtain suction device of the air curtain generating device of FIG. 1, respectively, and FIG. 3c is a schematic sectional view showing a housing for the suction device. 3d is a side view showing the maintenance state of the air curtain suction device. 4a and 4b are cross-sectional schematic views respectively showing other embodiments of the air curtain suction device of the present invention.

As shown in FIGS. 1a and 1b, the air curtain generating device 1 includes a blowing device 10 for generating planar air curtains A composed of two ascending air currents substantially in parallel, and an air curtain suction device 20 for sucking the air curtains. It has The symbol "T" indicates a desk on which the air curtain generator 1 is attached.
The distance H between the blow device 10 and the air curtain suction device 20 is 500 mm or more, preferably 600 mm or more, and particularly preferably 700 mm or more. A larger distance H between the blowing device 10 and the air curtain suction device 20 is preferable because the area of the air curtain as a partition can be increased. However, if the blow device 10 and the air curtain suction device 20 are too far apart, the air curtain generated by the blow device 10 cannot be sufficiently suctioned by the air curtain suction device 20, so the distance is preferably 1500 mm or less.

[Blow device 10]
As shown in FIG. 2a, the blow device 10 includes a blow device housing 110 elongated in the width direction of the air curtain, and a plurality of fans 120 installed in a row inside the blow device housing 110. there is However, the configuration of the blow device 10 is not particularly limited as long as a planar air curtain with high straightness can be generated.
Two slits 111 extending in the width direction of the air curtain are formed in parallel along each fan 120 in the upper surface of the blow device housing 110 . In this embodiment, the two slits 111 are provided above the fan 120 at regular intervals, but the two slits 111 may extend continuously in the width direction of the air curtain. The blow device housing 110 preferably comprises a housing body and a cover. However, the configuration is not particularly limited as long as the fan 120 can be accommodated in the blow device housing 110 .
The length h1 (lateral width direction of the air curtain) of the blow device housing 110 is 300 mm or more, preferably 400 mm or more. If it is smaller than 300 mm, there is a possibility that sufficient droplets cannot be ensured. The longer the length, the more reliably the droplets can be secured. For one person, the upper limit is 600 mm or less, preferably 500 mm or less, and for two people, the upper limit is 1200 mm or less, preferably 1000 mm or less. The width d1 (in the front-rear direction of the air curtain) of the blow device housing 110 is 10 mm or more, preferably 20 mm or more, particularly 30 mm or more and 50 mm or less. A smaller width of the blower device housing 110 is preferable because it saves space, but a width of less than 10 mm is not realistic in terms of fan performance and cost.
A known fan 120 is used, for example, 10 mm square to 40 mm square, preferably 20 mm square to 30 mm square, particularly 25 mm square. 8 or more, preferably 10 or more, and preferably 15 or less fans 120 are attached to the blowing device 10 .

Each air curtain (updraft) generated by the blow device 10 has a wind speed of 0.20 m/s or more, preferably 0.30 m/s, immediately before being sucked by the air curtain suction device 20 (opening of the hood 270, which will be described later). As mentioned above, it is particularly preferable to set the velocity to 0.35 m/s or more. If the velocity is 0.20 m/s or less, the straightness of the vertical updraft is lowered. In addition, if the air volume is too strong, the noise of the blowing device 10 increases, so it is preferable to set the air volume to 1.0 m/s or less. In other words, the outlet wind speed of the blow device 10 (the wind speed at the slit 111 of the blow device 10) varies according to the distance H between the blow device 10 and the air curtain suction device 20. For example, the lower limit is 0.5. It is 5 m/s or more, preferably 0.7 m/s or more, particularly preferably 0.8 m/s or more, and the upper limit is 3.0 m/s or less.
The volume of air generated by the blower 10 is 100 L/min or more, preferably 150 L/min or more, particularly preferably 200 L/min or more, and 400 L/min or less, for one-person use.
Although the installation location of the blow device 10 is not particularly limited, for example, it may be installed on a desk or stand, embedded inside a desk or stand, or installed between two desks or stands. .
As shown in FIG. 1b, the blowing device 10 configured in this manner generates two substantially parallel air curtains A rising substantially vertically from two parallel slits 111, so that two persons facing each other The air curtain can reliably catch the droplets of two users without disturbing the user's conversation.

[Air curtain suction device 20]
The air curtain suction device 20 is a ventilation device that sucks the air curtain A that spreads in the longitudinal and lateral directions as it rises, inactivates the sucked gas, and exhausts it. The air curtain suction device 20 includes a suction device housing 210, an ultraviolet irradiation device 250, an exhaust fan 260, a hood 270, and a lighting device 280, as shown in FIGS. 3a and 3b.
The air curtain suction device 20 is, for example, fixed to the ceiling of the room by a hanging type or the like, or supported by a pillar or the like.

"Aspirator housing 210"
The suction device housing 210 has a rectangular parallelepiped shape elongated in the width direction of the air curtain, and the lower surface 201 is made to transmit ultraviolet rays. As shown in FIG. 3c, the suction device housing 210 has two suction ports 203 and 204 elongated in the width direction of the air curtain on the bottom surface 201, and a discharge port 205 on the top surface 202. there is Inside the suction device casing 210, there are a bent first flow path 206 connecting the suction port 203 and the discharge port 205 on one side, and a bent second flow path connecting the suction port 204 and the discharge port 205 on the other side. 207 are formed. The suction ports 203 and 204 are provided parallel to both edges of the air curtain on the lower surface 201 in the front-rear direction so as to be at the same position in the width direction of the air curtain. A photocatalyst plate 208 is provided downstream of the first channel 206 and the second channel 207 . The width of the suction ports 203 and 204 is preferably 10 mm to 30 mm, particularly 15 mm to 25 mm. The two suction ports 203 and 204 are preferably separated by 2 to 10 times, particularly 3 to 6 times, the width of the blower housing, for example, by 50 mm to 300 mm, particularly 100 mm to 200 mm. preferable.
The size of the suction device housing 210 is not particularly limited as long as the first flow path 206 and the second flow path 207 can be secured. However, the length of the suction device housing 210 is preferably 0.8 to 1.4 times the length of the blow device housing 110 . On the other hand, the width of the suction device housing 210 is preferably 2 to 10 times, particularly 4 to 6 times, the width of the blow device housing 110 .
The channel (the first channel 206 and the second channel 207) is 200 mm or longer, preferably 250 mm or longer, particularly preferably 300 mm or longer, from the suction port to the discharge port. A longer length is preferable because viruses and the like can be reliably inactivated.

In detail, the suction device housing 210 is composed of a housing body 211 which is open at the bottom and elongated in the width direction of the air curtain, and a plurality of wind direction plates 215a to 215d installed therein.
The housing body 211 has two openings formed in the top wall (upper surface 202). This opening constitutes the discharge port 205 of the suction device housing 210 . Further, the housing main body 211 is made of a material that does not allow ultraviolet rays to pass through. Support portions 214a to 214d are provided on the inner surface of the housing body 211 to support the wind direction plates 215a to 215d.
The photocatalyst plate 208 is a synthetic resin plate in which granular photocatalysts such as titanium oxide are dispersed, and is provided on the inner surface of the upper surface 202 . However, the photocatalyst is not particularly limited as long as the photocatalyst is dispersed on the inner surface of the housing main body 211 , and for example, the photocatalyst paste may be applied to the inner surface of the housing main body 211 . The place where the photocatalyst is provided is not particularly limited as long as it is a channel (first channel 206 or second channel 207) in the suction device housing that is irradiated with ultraviolet rays, but the downstream side (for example, the suction port 50% or more, preferably 70% or more of the channel length).
Examples of materials for the housing body 220 include metals such as stainless steel and aluminum.

The wind direction plates 215a to 215d have ultraviolet transparency. The four wind direction plates 215a to 215d are supported by the support portions 214a to 214d of the suction device housing 210. As shown in FIG. That is, the first wind direction plate 215a has suction ports 203 and 204 extending in the front-rear direction of the air curtain so as to close the lower opening of the housing body 211 and along the front and rear walls 211a and 211b of the housing body 211. Placed horizontally to form. The second wind direction plate 215b is provided above the first wind direction plate 215a and below the upper surface 202 by a predetermined distance in parallel with the first wind direction plate 215a. The third wind direction plate 215c is provided horizontally from the front wall 211a toward the rear wall 211b between the first wind direction plate 215a and the second wind direction plate 215b. The fourth wind direction plate 215d has the same height as the third wind direction plate 215c, and is provided horizontally from the rear wall 211b toward the front wall 211a. The third air deflector 215c and the fourth air deflector 215d are separated from each other by a predetermined distance in the middle.
The arrangement of the wind direction plates is not particularly limited as long as the flow path can be curved or bent so that the flow path has a sufficient length.
The wind direction plates 215a to 215d are not particularly limited as long as they transmit ultraviolet rays, and preferably include transparent or translucent synthetic resins and quartz glass. In particular, quartz glass has a high ultraviolet transmittance. is high and is preferably used.

Because of this configuration, the first flow path 206 extends from the first suction port 203 to between the first air deflector 215a and the third air deflector 215c, and between the third air deflector 215c and the fourth air deflector 215c. between the third wind direction plate 215c and the second wind direction plate 215b; between the second wind direction plate 215b and the front wall 211a; ) to the nearest outlet 205 of the two. On the other hand, the second flow path 207 extends from the second suction port 204 to between the first air deflector 215a and the fourth air deflector 215d, between the third air deflector 215c and the fourth air deflector 215d, 2 through between the fourth wind direction plate 215d and the second wind direction plate 215b, between the second wind direction plate 215b and the rear wall 211b, and between the second wind direction plate 215b and the top wall (upper surface 202). to whichever of the two outlets 205 is closer.

"Ultraviolet irradiation device 250"
The ultraviolet irradiation device 250 is provided below the suction device housing 210 so as to irradiate ultraviolet rays upward (see FIG. 3B). Specifically, the lower surface 201 (first wind direction plate 215a) of the suction device housing 210 is provided so as to irradiate ultraviolet rays upward. By installing in this way, the entire inside of the suction device housing 210 can be irradiated with ultraviolet rays, and the irradiated ultraviolet rays do not reach the user directly. As the ultraviolet irradiation device 250, a known device is used. The wavelength is, for example, 200 nm or longer, preferably 300 nm or longer.
The ultraviolet irradiation device 250 is fixed to a hood 270 which will be described later.

"Exhaust fan 260"
The exhaust fan 260 is provided above the suction device housing 210 at the end of the first flow path 206 and the second flow path 207 so as to send air upward. Specifically, it is provided above the opening (exhaust port 205) of the upper surface 202 of the housing body 220 of the suction device housing 210 so as to discharge the air inside the body to the outside. In this embodiment, since there are two outlets 205, two outlet fans 260 are also provided (see FIG. 3a). Note that the installation position of the discharge fan 260 is not particularly limited as long as the gas in each flow path can be guided from the suction port to the discharge port.
As for the air volume (total) of the exhaust fan 260, the total air volume at the exhaust port 205 is 1.2 times or more, preferably 1.7 times or more, and particularly preferably 2.0 times or more, with respect to the total air volume of the blow device 10. Set to be If the air volume at the outlet 205 is less than 1.2 times the suction device, the air curtain cannot be efficiently sucked. Note that the upper limit of the air volume of the discharge fan 260 is 4.0 times.
It should be noted that the inactivation of viruses and the like is inversely proportional to the length of the flow path and the wind speed of the flow path. That is, the product of the length of the flow path and the wind speed of the flow path is preferably 0.06 m ² /s or more, preferably 0.08 m ² /s or more, and particularly preferably 1.0 m ² /s or more.

"Hood 270"
The hood 270 guides the diffused air curtain to the suction ports 203 and 204 of the air curtain suction device 20, and a known hood is used. For example, the inner surface of the hood 270 is tapered from bottom to top, forming an inclined guide that guides the gas to the suction port. The length of the lower end opening of the hood 270 (the width direction of the air curtain) is 1.1 times or more, preferably 1.2 times or more, particularly preferably 1.3 times or more, and 2.0 times that of the blow device 10 . It is below. The width of the lower end opening of the hood 270 (in the front-rear direction of the air curtain) is 5.0 times or more, preferably 7 times or more, particularly preferably 8 times or more, and 15 times or less that of the blow device 10 . The height of the hood 270 is 70 mm or more, preferably 90 mm or more, particularly preferably 100 mm or more, and 200 mm or less.
The hood 270 is hinged to the suction device housing 210 (see Figure 3d). That is, by rotating the hood 270 with respect to the suction device housing 210, the ultraviolet irradiation device 250 fixed to the hood 270 is exposed. Therefore, the maintenance work of the ultraviolet irradiation device 250 can be easily performed.

[Lighting device 280]
The illumination device 280 is provided below the suction device housing 210 so as to irradiate light downward, particularly below the ultraviolet irradiation device 250 . Specifically, it is fixed below the ultraviolet irradiation device 250 via a support 280a (see FIG. 3b).
A known device is used as the lighting device 280, and LED lighting is particularly preferably used. However, lighting device 280 and its installation location are not particularly limited as long as they can illuminate the desk or table located below. For example, the light may be indirect lighting for illuminating the ceiling, wall surface, or the like, and may be provided above the suction device housing 210 .

Because of this configuration, the air curtain suction device 20 sucks the two air curtains generated by the blow device 10 through the suction ports 203 and 204, respectively. The gas sucked from each of the suction ports 203 and 204 passes through the first channel 206 and the second channel 207 and is discharged from the discharge port 205 . The gas passing through the first channel 206 and the second channel 207 is then inactivated by the ultraviolet rays. In particular, since the photocatalyst is provided downstream of each channel, it can be deactivated more efficiently, and the deactivated air is discharged from the exhaust port. In other words, the air curtain suction device 20 acts as a ventilation device that inactivates droplets and the like and a lighting fixture that illuminates a desk or table.

In this way, the air curtain generating device 1 generates two air curtains in parallel with the blow device 10, so that the user's droplets are surely included in the air curtains without disturbing the conversation of the facing users. can let The air curtain suction device 20 collects droplets contained in the air curtain, deactivates the droplets, and ventilates the room, so that the user's droplets do not drift indoors. In particular, it is preferably used for desks and stands for eating and drinking.

The air curtain generator of the present invention is not limited to the above embodiments.
In the air curtain generating device 1 of FIG. 1, the blow device 10 generates two substantially parallel air curtains. Like the blow device 10A of FIG. A slit 111 is formed above to generate one air curtain. Alternatively, three slits may be provided to generate three or more air curtains. Since the air curtain suction device 20 has two suction ports, even if the air curtain spreads in the longitudinal direction when the air curtain rises, the air curtain can be sucked efficiently.
In the air curtain generating device 1 of FIG. 1, the air curtain suction device 20 has two suction ports and two flow paths. Alternatively, the flow path 206 may be one, or the flow path may be branched in the middle. Furthermore, the number of suction ports and channels may be three or more, and the channels may be branched or merged.
The air curtain generator 1 shown in FIG. 1 irradiates the channel with an ultraviolet irradiation device from below the housing, but the installation location is particularly limited as long as it irradiates at least a part of the channel. not to be For example, like the air curtain suction device 20B in FIG. 4B, an ultraviolet irradiation device 250 may be provided on the front side of the housing body 211 to irradiate the interior of the housing body 211 with ultraviolet rays. In this case, for example, the lower surface 201 of the suction device housing is made of a material that does not transmit ultraviolet rays, and the front wall 211a on which the ultraviolet irradiation device 250 is provided is made of a material that transmits ultraviolet rays. Further, it is preferable to prevent the ultraviolet rays irradiated inside from leaking out of the housing for the suction device.
A suction device casing 210 of the air curtain suction device in FIG. However, the suction port may be provided in the lower portion of the front wall 211a and/or the rear wall 211b of the housing 210 for suction device. In this case, it is preferable to guide the air curtain to the suction port by means of a hood, a guide, or the like. By providing the suction port on the front and rear walls in this manner, the opening of the suction port can be prevented from facing downward, and for example, ultraviolet rays reflected in the housing for the suction device are less likely to leak downward. Also, the discharge port 205 may be provided in the upper portion of the front and rear walls 211a and the left and right walls (not shown).
The shape of the suction device housing 210 of the air curtain suction device in FIG. 1 is a rectangular parallelepiped elongated in the width direction of the air curtain, but the shape is not particularly limited. However, considering the space saving of the suction device housing 210, it is preferable to use a rectangular parallelepiped that is long in the width direction of the air curtain.

1 Curtain generator 10, 10A Blow device 20, 20A, 20B Air curtain suction device 110 Case for blow device 111 Slit 120 Fan 210 Case for suction device 201 Lower surface 202 Upper surface 203 First suction port 204 Second suction port 205 outlet 206 first channel 207 second channel 208 photocatalyst plate 211 housing body 211a front wall 211b rear wall 214a support part 215a-d wind direction plate 250 ultraviolet irradiation device 260 discharge fan 270 hood 280 lighting device 280a support A air curtain

Claims (10)

An air curtain suction device that sucks a rising air curtain and inactivates the sucked gas,
a suction device housing for collecting the gas that spreads in the front, back, and width directions of the air curtain, a lighting device, an ultraviolet irradiation device, and an exhaust fan,
The suction device housing includes a suction port elongated in the width direction of the air curtain provided at the bottom, a discharge port provided at the top, and a curved or bent flow path connecting the suction port and the discharge port. and
The ultraviolet irradiation device irradiates the channel,
The exhaust fan discharges the air in the flow path from an exhaust port.
Air curtain suction device. The flow path of the suction device housing is formed by an ultraviolet-transmitting wind direction plate provided in the suction device housing,
The air curtain suction device according to claim 1. The suction device housing has two parallel suction ports and the discharge port,
The flow path has a first flow path that connects the suction port and the discharge port on one side, and a second flow path that connects the suction port and the discharge port on the other side,
The air curtain suction device according to claim 1 or 2. The ultraviolet irradiation device irradiates the flow path from below the housing for the suction device,
The air curtain suction device according to any one of claims 1 to 3. A photocatalyst is provided downstream of the channel,
The air curtain suction device according to any one of claims 1 to 4. The lighting device is provided below the suction device housing and emits light downward.
The air curtain suction device according to any one of claims 1 to 5. a blowing device for generating an ascending air curtain;
An air curtain generating device comprising the air curtain suction device according to any one of claims 1 to 6,
The blow device is set so that the wind speed of the air curtain immediately before being sucked by the air curtain suction device is 0.20 m/s or more.
Air curtain generator. The blowing device generates two air curtains rising substantially parallel.
The air curtain generator according to claim 7. A total air volume discharged from the outlet of the air curtain suction device is set to be larger than a total air volume of the air curtain generated from the blow device.
The air curtain generator according to claim 7 or 8. A desk provided with the air curtain generator according to any one of claims 7 to 9.

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