Air curtain suction device, air curtain generator equipped with the same, and desk

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]

[0001] The present invention relates to an air curtain suction device that inactivates bacteria, viruses, etc. contained in droplets sucked into an air curtain and ventilates the room, as well as an air curtain generator and desk equipped with the same. [Background technology]

[0002] In recent years, restaurants, conference rooms, and other establishments have installed transparent partitions such as dividers on tables due to the impact of the COVID-19 pandemic. However, partitions do not disinfect or sterilize viruses in droplets, but rather prevent droplets from spreading to the opposite side. Therefore, after use, droplets that adhere to the partition must be disinfected or sterilized. There is also a risk that droplets that collide with the partition and are repelled may become airborne in the room.

[0003] As a means for solving such problems with partitions, the use of air curtains has been considered. Patent Document 1 discloses an air purifier that includes an intake section with a hollow intake port that draws in air containing droplets, a droplet removal section that removes droplets from the air, an outlet section with an outlet that blows out the air from which the droplets have been removed, and an air blower that blows air from the intake port to the outlet, and blows out an airflow downward from the outlet section. Examples of the droplet removal section include a filter, an ultraviolet irradiation device, an ozone generator, an oxidation catalyst purification device, and a disinfectant. Patent Document 2 discloses a ventilation system for infection control that includes an air supply section with multiple air supply nozzles that supply air with a cross-sectional area that increases upward, an exhaust section with an exhaust port located above the air supply nozzles and opening downward, and multiple airflow guides. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 6908313 [Patent Document 2] Patent No. 6932823 Summary of the Invention [Problem to be solved by the invention]

[0005] The air purifier in Patent Document 1 blows air downward, and any air that cannot be sucked in through the inlet collides with the table and scatters. Therefore, it is not suitable for use on a table on which food or other items are placed. Even if the air purifier can suck in all of the air, it cannot eliminate the user's anxiety about whether all of the air is being sucked in through the inlet. The ventilation system for infection control in Patent Document 2 blows air upward, but does not mention how to process air containing droplets. For example, even if the droplet removal unit in Patent Document 1 were installed in the ventilation system for infection control in Patent Document 2, the droplet removal unit would be installed above the user, which would not resolve the safety issue for the user. The present invention is intended to solve such problems, and aims to provide an air curtain suction device that can be easily attached to a desk or the like, and an air curtain generating device equipped with the same. [Means for solving the problem]

[0006] The air curtain suction device of the present invention is an air curtain suction device that sucks in a rising air curtain and inactivates the sucked gas, and is characterized in that it has a suction device housing that collects the gas spreading in the front-to-back and width directions of the air curtain, a lighting device, an ultraviolet irradiation device, and an exhaust fan, and the suction device housing has a suction port that is long in the width direction of the air curtain and is provided at the bottom, an exhaust port that is provided at the top, and a curved or bent flow path that connects the suction port and the exhaust port, the ultraviolet irradiation device irradiates the flow path, and the exhaust fan releases the air in the flow path from the exhaust port. The air curtain suction device of the present invention collects the gas spreading in the front-to-back and width directions of the air curtain, passes the collected gas through a flow path inside the suction device housing, inactivates it with ultraviolet light, and releases it from an exhaust port. This prevents the dispersion of droplets generated by conversations between multiple users, and even if the droplets from users contain viruses, they can be inactivated and ventilated. The air curtain suction device of the present invention is also equipped with a lighting device, so it can also function as a light for users.

[0007] 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 air direction plate provided in the suction device housing. In this case, the entire flow path can be irradiated by the ultraviolet irradiation device, thereby more reliably inactivating viruses, etc. In the air curtain suction device of the present invention, the suction device housing preferably has two parallel suction ports and two parallel exhaust ports, and the flow paths preferably have a first flow path connecting one of the suction ports and the exhaust port, and a second flow path connecting the other of the suction ports and the exhaust port. This allows for efficient suction even when the air curtain spreads in the front-to-rear direction as it rises. This is also preferred when two parallel air curtains are simultaneously sucked in. In the air curtain suction device of the present invention, it is preferable that the ultraviolet irradiating device irradiates the flow path from below the suction device housing, thereby reducing the risk of a user being exposed to ultraviolet rays. In the air curtain suction device of the present invention, it is preferable that a photocatalyst is provided downstream of the flow path, in which 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 lighting device is provided below the suction device housing and irradiates light downward.

[0008] The air curtain generator of the present invention comprises a blowing device that generates a rising air curtain and the air curtain suction device of the present invention, and is characterized in that the blowing device is set so that the wind speed of the air curtain just before it is sucked into the air curtain suction device is 0.20 m / s or more. When the wind speed of the air curtain just before it is sucked into 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. In the air curtain generator of the present invention, it is preferable that the blower generates two air curtains that rise approximately parallel to each other. In this case, droplets from the user can be efficiently captured by the air curtains. 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 greater than the total volume of air generated from the blower device. In this case, gas spreading in the front-to-back and width directions of the rising air curtain can be more reliably sucked in. In addition, droplets floating in the surrounding area that could not be captured by the air curtain can also be sucked in, improving the ventilation and purification function. The desk of the present invention is characterized by being equipped with the air curtain generator of the present invention. The air curtain generator of the present invention raises the air curtain that captures droplets, etc., so there is no risk of air currents that cannot be sucked in by the air curtain suction device colliding with the table and being scattered. Therefore, it is suitable for desks where food and drink are handled, such as dining tables. [Effects of the Invention]

[0009] The air curtain suction device of the present invention can efficiently collect the air curtain that expands in the front-to-back and width directions as it rises, preventing the dispersion of droplets generated by conversations between multiple users. Furthermore, the collected gas is passed through a flow path inside the suction device housing, inactivated with ultraviolet light, and then released from the exhaust port, allowing for ventilation by inactivating viruses and other contagious droplets from users. In particular, users can feel safe even if the droplets do not contain viruses and other contagious droplets. Furthermore, the air curtain suction device can also be used as a lighting fixture. Thus, an air curtain generator equipped with the air curtain suction device of the present invention is preferably used on tables or stands where people eat and drink. [Brief explanation of the drawings]

[0010] [Figure 1] 1a and 1b are a front view and a side view, respectively, showing an embodiment of the air curtain generating device of the present invention. [Figure 2] 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. [Figure 3] 3a and 3b are a front view and a schematic cross-sectional view along line X-ray, respectively, showing the air curtain suction device of the air curtain generator of FIG. 1, FIG. 3c is a schematic cross-sectional view showing the housing for the suction device, and FIG. 3d is a side view showing the maintenance state of the air curtain suction device. [Figure 4] 4a and 4b are cross-sectional schematic views showing other embodiments of the air curtain suction device of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0011] 1a and 1b, the air curtain generator 1 includes a blower 10 that generates a planar air curtain A consisting of two roughly parallel ascending air currents, and an air curtain suction device 20 that sucks in the air curtain. The letter "T" indicates the desk on which the air curtain generator 1 is attached. The distance H between the blowing 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 it allows for a larger area of ​​the air curtain as a partition. However, if the blowing device 10 and the air curtain suction device 20 are placed too far apart, the air curtain generated by the blowing device 10 cannot be sufficiently sucked in by the air curtain suction device 20, so a distance of 1500 mm or less is preferable.

[0012] [Blow device 10] 2a, the blowing device 10 includes a blowing device housing 110 that is elongated in the width direction of the air curtain, and a plurality of fans 120 that are installed in a row within the blowing device housing 110. However, the configuration of the blowing device 10 is not particularly limited as long as it can generate a planar air curtain that has high linearity. Two parallel slits 111 extending in the width direction of the air curtain are formed on the top surface of the blower housing 110 along each fan 120. In this embodiment, the two slits 111 are provided above the fans 120 at a fixed interval, but the two slits 111 may also extend continuously in the width direction of the air curtain. The blower housing 110 is preferably composed of a housing body and a cover. However, the configuration is not particularly limited as long as the fans 120 can be accommodated within the blower housing 110. The length h1 (widthwise direction of the air curtain) of the blow device housing 110 is 300 mm or more, preferably 400 mm or more. If it is less than 300 mm, there is a risk that droplets will not be sufficiently contained. The longer it is, the more reliably droplets can be contained, but for a single-person use, the upper limit is 600 mm or less, preferably 500 mm or less, and for a two-person use, the upper limit is 1200 mm or less, preferably 1000 mm or less. The width d1 (front-to-back 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 blow device housing 110 is preferable to save space, but a width of less than 10 mm is not practical due to the fan performance and cost. Known fans are used for the fans 120, for example, 10 mm to 40 mm square, preferably 20 mm to 30 mm square, and particularly 25 mm square. Eight or more, preferably ten or more, and up to 15 fans 120 are preferably attached to the blowing device 10.

[0013] The air curtain (updraft) generated by the blowing device 10 preferably has a wind speed of 0.20 m / s or more, preferably 0.30 m / s or more, and particularly preferably 0.35 m / s or more, just before being sucked into the air curtain suction device 20 (at the opening of the hood 270, described later). A wind speed of 0.20 m / s or less reduces the linearity of the vertical updraft. Note that a wind speed of 1.0 m / s or less is preferable because excessively strong wind volume increases the noise of the blowing device 10. In other words, the outlet wind speed of the blowing device 10 (wind speed at the slit 111 of the blowing device 10) varies depending on the distance H between the blowing device 10 and the air curtain suction device 20. For example, the lower limit is 0.5 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 air volume generated by the blower 10 for one person is 100 L / min or more, preferably 150 L / min or more, and particularly preferably 200 L / min or more and 400 L / min or less. The installation location of this blowing device 10 is not particularly limited, but it may be installed on a desk or stand, embedded inside a desk or stand, or installed between two desks or stands, for example. The blower device 10 configured in this manner generates two approximately parallel air curtains A that rise approximately vertically from two parallel slits 111, as shown in Figure 1b, so that the air curtains can reliably capture droplets from two users facing each other without interfering with their conversation.

[0014] [Air curtain suction device 20] The air curtain suction device 20 is a ventilation device that sucks in the air curtain A, which expands in the front-to-back and width directions as it rises, inactivates the sucked gas, and exhausts it. As shown in Figures 3a and 3b, the air curtain suction device 20 has a suction device housing 210, an ultraviolet irradiation device 250, an exhaust fan 260, a hood 270, and a lighting device 280. The air curtain suction device 20 is, for example, fixed to the ceiling of the room in a hanging manner or supported by a pillar or the like.

[0015] "Housing for suction device 210" The suction device housing 210 has a rectangular parallelepiped shape elongated in the width direction of the air curtain, and the bottom surface 201 is UV-transparent. 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 an exhaust port 205 on the top surface 202. The suction device housing 210 also has a first bent flow path 206 connecting the suction port 203 and the exhaust port 205, and a second bent flow path 207 connecting the suction port 204 and the exhaust port 205. The suction ports 203 and 204 are located parallel to each other on both edges of the air curtain in the front-to-rear direction of the bottom surface 201, so as to be in the same position in the width direction of the air curtain. A photocatalytic plate 208 is provided downstream of the first flow path 206 and the second flow path 207. The width of the suction ports 203, 204 is preferably 10 mm to 30 mm, and more preferably 15 mm to 25 mm. The two suction ports 203, 204 are preferably spaced apart by 2 to 10 times, and more preferably 3 to 6 times, the width of the housing for the blower, for example, 50 mm to 300 mm, and more preferably 100 mm to 200 mm. The size of the suction device casing 210 is not particularly limited as long as it can secure the first flow path 206 and the second flow path 207. However, the length of the suction device casing 210 is preferably 0.8 to 1.4 times the length of the blow device casing 110. On the other hand, the width of the suction device casing 210 is preferably 2 to 10 times, and particularly 4 to 6 times the width of the blow device casing 110. The length of the flow paths (first flow path 206 and second flow path 207) from the intake port to the exhaust port is 200 mm or more, preferably 250 mm or more, and particularly preferably 300 mm or more. A longer length is preferable because viruses and the like can be inactivated more reliably, but the device would become too large, so the length is 1500 mm or less.

[0016] More specifically, suction device housing 210 is made up of housing body 211 that is open downward and elongated in the width direction of the air curtain, and a plurality of air direction plates 215a to 215d installed inside. Two openings are formed in the top wall (upper surface 202) of the housing body 211. These openings constitute the outlet 205 of the suction device housing 210. The housing body 211 is made of a material that does not transmit ultraviolet light. Support portions 214a-d that support airflow direction plates 215a-d are provided on the inner surface of the housing body 211. Photocatalyst plate 208 is a synthetic resin plate in which granular photocatalyst such as titanium oxide is dispersed, and is provided on the inner surface of upper surface 202. However, as long as the photocatalyst is dispersed on the inner surface of housing main body 211, there are no particular limitations on where it is provided, and for example, photocatalyst paste may be painted on the inner surface of housing main body 211. Furthermore, the location where the photocatalyst is provided is not particularly limited as long as it is in the flow path (first flow path 206 or second flow path 207) inside the suction device housing that is irradiated with ultraviolet light, but it is preferable to provide it on the downstream side (for example, 50% or more, preferably 70% or more of the flow path length from the suction port). The housing body 220 may be made of metal such as stainless steel or aluminum.

[0017] The four airflow direction vanes 215a-d are ultraviolet-transmitting. The four airflow direction vanes 215a-d are supported by supports 214a-d of the suction device housing 210. That is, the first airflow direction vane 215a is installed horizontally so as to close the downward opening of the housing main body 211 and to form suction ports 203, 204 extending in the front-rear direction of the air curtain along the front and rear walls 211a, 211b of the housing main body 211. The second airflow direction vane 215b is installed above the first airflow direction vane 215a, a predetermined distance below the top surface 202, and parallel to the first airflow direction vane 215a. The third airflow direction vane 215c is installed horizontally between the first airflow direction vane 215a and the second airflow direction vane 215b, extending from the front wall 211a toward the rear wall 211b. The fourth wind direction vane 215d is at the same height as the third wind direction vane 215c and is provided horizontally from the rear wall 211b toward the front wall 211a. The third wind direction vane 215c and the fourth wind direction vane 215d are separated by a predetermined distance in the middle. The arrangement of the airflow direction plate is not particularly limited as long as the airflow path can be curved or bent so that the airflow path has a sufficient length. The wind direction plates 215a to 215d are not particularly limited as long as they transmit ultraviolet rays, and preferred examples include transparent or translucent synthetic resins and quartz glass, with quartz glass being particularly preferred as it has high transmittance for ultraviolet rays.

[0018] As configured in this manner, the first flow path 206 passes from the first suction port 203 between the first wind deflector 215a and the third wind deflector 215c, between the third wind deflector 215c and the fourth wind deflector 215d, between the third wind deflector 215c and the second wind deflector 215b, between the second wind deflector 215b and the front wall 211a, and between the second wind deflector 215b and the ceiling wall (upper surface 202), and reaches the nearest of the two exhaust ports 205. On the other hand, the second flow path 207 passes from the second suction port 204 between the first wind deflector 215a and the fourth wind deflector 215d, between the third wind deflector 215c and the fourth wind deflector 215d, between the fourth wind deflector 215d and the second wind deflector 215b, between the second wind deflector 215b and the rear wall 211b, and between the second wind deflector 215b and the ceiling wall (upper surface 202), and reaches the nearest of the two exhaust ports 205.

[0019] "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). More specifically, it is provided so as to irradiate ultraviolet rays upward onto the lower surface 201 (first airflow direction plate 215a) of the suction device housing 210. By providing such an arrangement, the entire interior of the suction device housing 210 can be irradiated with ultraviolet rays, and the irradiated ultraviolet rays do not directly reach the user. A known ultraviolet irradiation device is used as the ultraviolet irradiation device 250. The wavelength is, for example, 200 nm or more, preferably 300 nm or more. The ultraviolet irradiation device 250 is fixed to a hood 270, which will be described later.

[0020] "Exhaust fan 260" The exhaust fan 260 is provided above the suction device housing 210, which is the terminal end of the first flow path 206 and the second flow path 207, so as to send air upward. More specifically, the exhaust fan 260 is provided above an opening (exhaust port 205) on the top surface 202 of the housing main body 220 of the suction device housing 210, so as to exhaust air inside the main body to the outside. In this embodiment, since two exhaust ports 205 are provided, two exhaust fans 260 are also provided (see FIG. 3a). The installation position of the exhaust fan 260 is not particularly limited as long as it can guide the gas in each flow path from the suction port to the exhaust port. The total air volume of the exhaust fan 260 is set so that 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, the total air volume of the blowing device 10. If the air volume at the exhaust port 205 is less than 1.2 times the suction device volume, the air curtain cannot be sucked in efficiently. The upper limit of the air volume of the exhaust fan 260 is 4.0 times. The inactivation of viruses etc. is inversely proportional to the length of the flow path and the wind speed of the flow path. 2 / s or more, preferably 0.08m 2 / s or more, especially 1.0m 2 It is preferable to set the value to be / s or more.

[0021] "Food 270" The hood 270 guides the diffusing 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 tapers upward, forming an inclined guide that guides the gas toward the suction port. The length of the lower end opening of the hood 270 (in the width direction of the air curtain) is at least 1.1 times, preferably at least 1.2 times, and particularly preferably at least 1.3 times, but not more than 2.0 times, that of the blow device 10. The width of the lower end opening of the hood 270 (in the front-to-rear direction of the air curtain) is at least 5.0 times, preferably at least 7 times, and particularly preferably at least 8 times, but not more than 15 times that of the blow device 10. The height of the hood 270 is at least 70 mm, preferably at least 90 mm, and particularly preferably at least 100 mm, but not more than 200 mm. The hood 270 is connected to the suction device housing 210 by a hinge (see FIG. 3d). That is, by rotating the hood 270 relative to the suction device housing 210, the ultraviolet irradiation device 250 fixed to the hood 270 is exposed. Therefore, maintenance work on the ultraviolet irradiation device 250 can be easily performed.

[0022] [Lighting Device 280] The lighting device 280 is provided below the suction device housing 210 so as to irradiate light downward, and in particular, is provided 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 lighting device may be used as the lighting device 280, and LED lighting is particularly preferred. However, the lighting device 280 and its installation location are not particularly limited as long as it can illuminate the desk or table located below. For example, the lighting device 280 may be installed above the suction device housing 210 as indirect lighting that illuminates the ceiling, wall, etc.

[0023] With this configuration, air curtain suction device 20 sucks in the two air curtains generated by blow device 10 through suction ports 203 and 204, respectively. The gas sucked through each of suction ports 203 and 204 passes through first flow path 206 and second flow path 207 and is discharged from outlet 205. The gas passing through first flow path 206 and second flow path 207 is then inactivated by ultraviolet light. In particular, since a photocatalyst is provided downstream of each flow path, inactivation can be performed more efficiently, and the inactivated air is discharged from the outlet. In other words, air curtain suction device 20 functions as a ventilation device that inactivates droplets and the like, and as a lighting fixture that illuminates desks and tables.

[0024] In this way, the air curtain generator 1 uses the blower device 10 to generate two parallel air curtains, ensuring that droplets from users are contained within the air curtains without disrupting conversations between users sitting opposite each other. The air curtain suction device 20 then collects the droplets contained within the air curtains, inactivates them, and ventilates the room, preventing droplets from drifting within the room. This device is particularly suitable for use on tables and stands where people eat and drink.

[0025] The air curtain generating device of the present invention is not limited to the above embodiment. In the air curtain generator 1 of Fig. 1, the blowing device 10 generates two approximately parallel air curtains, but as in the blowing device 10A of Fig. 2b, one slit 111 is formed above each fan 120 in the blowing device housing 110, generating one air curtain. Alternatively, three slits may be provided to generate three or more air curtains. The air curtain suction device 20 has two suction ports, so it can efficiently suck in air even if it disperses in the front and rear directions as the air curtain rises. In the air curtain generator 1 of Fig. 1, the air curtain suction device 20 has two suction ports and two flow paths, but for example, as in the air curtain suction device 20A of Fig. 4a, it may have one suction port 203 and one flow path 206, or the flow path may branch along the way. Furthermore, there may be three or more suction ports and flow paths, and the flow paths may branch or merge. In the air curtain generator 1 of Fig. 1, an ultraviolet irradiation device irradiates the flow path from below the housing, but the location of the device is not particularly limited as long as it irradiates at least a portion of the flow path. For example, as in the air curtain suction device 20B of Fig. 4b, an ultraviolet irradiation device 250 may be provided on the front side of the housing main body 211 to irradiate ultraviolet rays into the housing main body 211. In this case, for example, the bottom 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. It is preferable to prevent the ultraviolet rays irradiated inside from leaking out of the suction device housing. The suction device housing 210 of the air curtain suction device in FIG. 1 has suction ports 203 and 204 provided on the bottom surface 201 and exhaust port 205 provided on the top surface 202. However, the suction ports may be provided in the lower part of the front wall 211a and / or rear wall 211b of the suction device housing 210. In this case, it is preferable to guide the air curtain to the suction ports using a hood, guide, or the like. By providing the suction ports on the front and rear walls in this way, the openings of the suction ports can be prevented from facing downward, which makes it less likely that ultraviolet light reflected inside the suction device housing will leak downward. Alternatively, the exhaust port 205 may be provided in the upper part of the front and rear walls 211a or left and right walls (not shown). 1 has a rectangular parallelepiped shape elongated in the width direction of the air curtain, but the shape is not particularly limited. However, in consideration of saving space for the suction device housing 210, it is preferable to have a rectangular parallelepiped shape elongated in the width direction of the air curtain. [Explanation of symbols]

[0026] 1. Curtain generator 10, 10A blower 20, 20A, 20B Air curtain suction device 110 Blow device housing 111 Slit 120 fans 210 Housing for suction device 201 Bottom surface 202 Top surface 203 First suction port 204 Second suction port 205 Outlet 206 First Channel 207 Second Channel 208 Photocatalytic Plate 211 Housing body 211a front wall 211b Back wall 214a Support part 215a~d Wind direction board 250 Ultraviolet irradiation device 260 Exhaust fan 270 Food 280 Lighting Equipment 280a Support A Air Curtain

Claims

1. An air curtain suction device fixed to a ceiling that sucks in a rising air curtain and inactivates the sucked gas, The air curtain includes a suction device housing that collects the gas that spreads in the front-to-rear and width directions of the air curtain, a lighting device that is provided below the suction device housing and that irradiates light downward, an ultraviolet irradiation device, and an exhaust fan, The suction device housing has two suction ports provided in parallel at the bottom and elongated in the width direction of the air curtain, an exhaust port provided at the top, and a curved or bent flow path connecting the suction ports and the exhaust port, The two parallel suction ports are provided so as to sandwich the lighting device, the flow path is formed by a first flow path connecting one of the suction ports and the discharge port, and a second flow path connecting the other of the suction ports and the discharge port, The ultraviolet irradiation device irradiates the flow path, The exhaust fan discharges the air in the flow path through an exhaust port. Air curtain suction device.

2. The flow path of the suction device housing is formed by an ultraviolet-transmitting airflow direction plate provided in the suction device housing. The air curtain suction device according to claim 1.

3. The ultraviolet irradiation device irradiates the flow path from below the suction device housing. The air curtain suction device according to claim 1 or 2.

4. A photocatalyst is provided downstream of the flow path. The air curtain suction device according to any one of claims 1 to 3.

5. a blowing device that generates an ascending air curtain; An air curtain generating device having the air curtain suction device according to any one of claims 1 to 4, The blower is set so that the wind speed of the air curtain just before being sucked into the air curtain suction device is 0.30 m / s or more. Air curtain generator.

6. The wind speed of the air curtain is 0.35 m / s or more. The air curtain generating device according to claim 5.

7. The blower generates two air curtains that rise substantially parallel to one another.

7. The air curtain generating device according to claim 5 or 6.

8. 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 by the air curtain from the blowing device.

8. The air curtain generating device according to claim 5.

9. A desk equipped with the air curtain generator according to any one of claims 5 to 8.

10. The blowing device is embedded in a desk.

10. The desk of claim 9.

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