Air Shower Device

Abstract

To provide an air shower device capable of killing or inactivating viruses.SOLUTION: An air shower device includes: a booth having a door enabling a person to enter / leave a first side wall part; and an air blowing unit blowing air to the booth. The air blowing unit includes: a first air blowing fan activated when a person is in the booth; a second air blowing fan for circulating air; an air purification filter for purifying air; and a first light source for irradiating the air purification filter with ultraviolet rays. The air shower device further includes a second light source for irradiation to inside of the booth. The second light source may emit ultraviolet rays with a wavelength of which peak is in a range of 200 nm or more and 240 nm or less.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] An embodiment of the present invention relates to an air shower apparatus. [Background technology]

[0002] In clean rooms where the number of particles or microorganisms floating in the air is controlled to be below a certain level, an air shower device is installed at the entrance to the clean room. Anyone entering the room first blows off particles or microorganisms adhering to their clothing in the air shower device before entering the clean room. This maintains the cleanliness of the clean room at a certain level (see, for example, Patent Document 1).

[0003] In recent years, in order to prevent the spread of infectious diseases such as influenza or the new coronavirus, there has been an increasing number of cases where air shower devices are installed not only in clean rooms but also at entrances to buildings such as houses (see, for example, Patent Document 2). [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-163108 [Patent Document 2] Japanese Patent Application Publication No. 2019-112813 Summary of the Invention [Problem to be solved by the invention]

[0005] However, from the perspective of preventing the spread of infectious diseases, simply blowing away viruses with an air shower device is not enough. This is because there is a possibility that live viruses may enter the building through the air shower device. Therefore, in order to prevent the spread of infectious diseases, it is necessary not only to blow away viruses with an air shower device, but also to inactivate or kill them.

[0006] In view of the above problems, one object of one embodiment of the present invention is to provide an air shower device that can inactivate or kill viruses. [Means for solving the problem]

[0007] An air shower apparatus according to one embodiment of the present invention includes a booth having a door on a first side wall through which people can enter and exit, and a blower unit that blows air into the booth. The blower unit includes a first blower fan that operates when people are in the booth, a second blower fan that circulates the air, an air purification filter that purifies the air, and a first light source that irradiates the air purification filter with ultraviolet light.

[0008] An air shower apparatus according to one embodiment of the present invention includes a booth having a door on a first side wall through which people can enter and exit, and a blower unit that blows air into the booth. The blower unit includes a first blower fan that can switch between a first airflow rate that operates when people are in the booth and a second airflow rate that is smaller than the first airflow rate and that constantly circulates the air, an air purification filter that purifies the air, and a first light source that irradiates the air purification filter with ultraviolet light.

[0009] The air shower apparatus may further include a second light source that irradiates the inside of the booth, and the second light source may irradiate ultraviolet light having a peak wavelength in the range of 200 nm to 240 nm.

[0010] The ultraviolet light from the second light source may be emitted when the first blower fan and the second blower fan are stopped.

[0011] The ultraviolet light from the second light source may be emitted when the first airflow rate and the second airflow rate are not operating.

[0012] The ultraviolet light from the second light source may be irradiated at least one of when a person enters the room and at a predetermined time after the person leaves the room.

[0013] The predetermined time may be equal to or greater than 0.1 (seconds) and equal to or less than 900 (seconds).

[0014] The blower unit may be disposed above a ceiling of the booth. The blower unit may be disposed adjacent to a second side wall of the booth that is different from the first side wall.

[0015] The air cleaning filter may be disposed on the inlet side of the first blower fan.The air cleaning filter may be disposed on the outlet side of the first blower fan.

[0016] The first light source may be disposed on the inlet side of the air cleaning filter.The first light source may be disposed on the outlet side of the air cleaning filter.

[0017] The ultraviolet light emitted from the first light source may be UV-C. [Effects of the Invention]

[0018] The air shower device according to one embodiment of the present invention can inactivate or kill viruses attached to people's clothing, etc., thereby preventing the spread of live viruses and the spread of infectious diseases. [Brief explanation of the drawings]

[0019] [Figure 1] 1 is a schematic diagram illustrating the appearance of an air shower apparatus according to an embodiment of the present invention. FIG. [Figure 2] 1 is a schematic diagram illustrating the inside of an air shower apparatus according to an embodiment of the present invention. FIG. [Figure 3] FIG. 2 is a schematic diagram illustrating the configuration of an air blowing unit of the air shower apparatus according to the embodiment of the present invention. [Figure 4] 1 is a schematic diagram illustrating the inside of an air shower apparatus according to an embodiment of the present invention. FIG. [Figure 5] FIG. 2 is a schematic diagram illustrating the configuration of an air blowing unit of the air shower apparatus according to the embodiment of the present invention. [Figure 6]1 is a schematic diagram illustrating the inside of an air shower apparatus according to an embodiment of the present invention. FIG. DETAILED DESCRIPTION OF THE INVENTION

[0020] Hereinafter, each embodiment of the present invention will be described with reference to the drawings. Note that the embodiments are merely examples, and any embodiment that a person skilled in the art could easily come up with by appropriately modifying the embodiment while maintaining the gist of the invention is naturally included within the scope of the present invention. Furthermore, in order to clarify the explanation, the drawings may show the width, thickness, shape, etc. of each part schematically compared to the actual embodiment. However, the illustrated shapes are merely examples and do not limit the interpretation of the present invention.

[0021] In this specification, for the sake of convenience, the terms "above" or "upper" or "below" or "lower" are used in the description, but these terms merely describe the hierarchical relationship of each component. For example, when a structure is installed, the side of the installation surface on which the structure is normally installed is referred to as "lower" or "lower."

[0022] In this specification, the letters "first," "second," or "third" attached to each component are convenient labels used to distinguish each component, and have no other meaning unless otherwise specified.

[0023] In this specification and drawings, the same reference numeral is used to collectively represent multiple identical or similar components, and capital letters may be added to distinguish between these multiple components. Furthermore, a hyphen and a natural number may be used to distinguish between multiple parts of a single component.

[0024] First Embodiment An air shower device 10 according to one embodiment of the present invention will be described with reference to FIGS.

[0025] 1 and 2 are schematic diagrams illustrating the exterior and interior, respectively, of an air shower apparatus 10 according to one embodiment of the present invention. As shown in FIGS. 1 and 2, the air shower apparatus 10 includes a booth 100, a blower unit 200, a duct 300, and a control unit 400.

[0026] The booth 100 has a box shape surrounded by a floor, a ceiling, and four side walls. As shown in FIG. 1, the booth 100 has a door 110 on one of the four side walls (a first side wall) through which people can enter and exit. Therefore, a user enters through the door 110, has air blown onto the inside of the booth 100, and then exits through the door 110. By blowing air into the booth 100, fine particles or viruses attached to the user's hair, clothing, shoes, etc. can be removed. The door 110 may be translucent so that it can be seen from the outside. For example, an acrylic plate can be used as the door 110.

[0027] The two adjacent side walls of the air shower apparatus 10 do not necessarily have to be connected with a corner. The two side walls may be connected continuously while being curved. Therefore, the shape of the booth 100 is not limited to a box shape. The booth 100 may also be cylindrical or elliptical.

[0028] As a modified example of the air shower apparatus 10, doors 110 may be provided on two side walls (a first side wall and a third side wall facing the first side wall) of the booth 100. In this case, users can enter through the door 110 provided on the first side wall and exit through the door 110 provided on the second side wall.

[0029] The interior of the booth 100 has a space that can accommodate one person, but is not limited to this. The interior of the booth 100 may have a space that can accommodate multiple people.

[0030] 2, the ceiling of the booth 100 is provided so as to be in communication with the outlet of an air outlet of a blower unit 200, which will be described later. Air blown from the blower unit 200 is blown into the booth 100 through the air outlet.

[0031] 2, a grating 120 is provided on the floor of the booth 100. The air blown into the booth 100 from the blower unit 200 is discharged from the grating 120 together with the removed fine particles or viruses.

[0032] As shown in FIG. 2, a sensor 130 is installed on a side wall of the booth 100. The sensor 130 can detect a person inside the booth 100. For example, an infrared sensor can be used as the sensor 130. The installation position of the sensor 130 is not limited to the side wall. The sensor 130 may also be installed on the ceiling or floor.

[0033] The blower unit 200 is disposed above the ceiling of the booth 100. In other words, the blower unit 200 is disposed adjacent to the ceiling of the booth 100. The blower unit 200 can blow air into the booth 100 or circulate air within the booth 100. The configuration of the blower unit 200 will be described in detail later.

[0034] The duct 300 is disposed to the side of the side wall of the booth 100. The duct 300 is disposed adjacent to the side wall of the booth 100 and is connected to the booth 100 and the blower unit 200. Specifically, one end of the duct 300 is connected to the space below the grating 120, and the other end of the duct 300 is connected to an opening of the blower unit 200. The duct 300 is a pipe for returning air discharged from the booth 100 to the blower unit 200. In other words, the air inside the booth 100 is discharged from the grating 120 provided on the floor of the booth 100 and is supplied again to the blower unit 200 through the duct 300.

[0035] As a modification of the air shower apparatus 10, the air shower apparatus 10 may not include the duct 300. In this case, the air shower apparatus 10 is used by being connected to piping installed in a building, for example. That is, the air inside the booth 100 is circulated through external piping.

[0036] The control unit 400 is a computer capable of performing arithmetic processing using data or information. The control unit 400 includes, for example, a central processing unit (CPU), a microprocessor (MPU), or a random access memory (RAM). Specifically, the control unit 400 executes a program, receives a detection signal from the sensor 130, and controls the air blower unit 200. The control unit 400 can be arranged in a control box-like configuration on the ceiling, floor, or sidewall of the booth 100, but is not limited to this.

[0037] 3 is a schematic diagram illustrating the configuration of the air blower unit 200 of the air shower apparatus 10 according to one embodiment of the present invention. As shown in FIG. 3, the air blower unit 200 includes an air cleaning filter 210, a first light source 220, a first air blower fan 230, a second air blower fan 240, an air duct 250, an air outlet 260, and an ionizer 270.

[0038] The air purifying filter 210 includes filter fibers and can capture fine particles or viruses removed within the booth 100 using the filter fibers. That is, the circulating air is purified by passing through the air purifying filter 210. For example, a HEPA filter or an ULPA filter can be used as the air purifying filter 210. The air purifying filter 210 may also be a sterilizing air purifying filter in which an enzyme is immobilized on the filter fibers. In this case, the viruses captured on the filter fibers are decomposed by the enzyme. That is, the viruses can be killed. The air purifying filter 210 may also be equipped with a photocatalytic panel.

[0039] The first light source 220 can irradiate the air cleaning filter 210 with ultraviolet light. Irradiating the air cleaning filter 210 with ultraviolet light from the first light source 220 can inactivate viruses trapped in the filter fibers of the air cleaning filter 210. The inactivation of viruses occurs because the viruses are damaged by the ultraviolet light. Furthermore, if a photocatalytic panel is installed on the air cleaning filter 210, the photocatalyst can be activated by irradiating the photocatalyst panel with ultraviolet light, and the air passing through the air cleaning filter 210 can be purified (e.g., deodorized). For example, an ultraviolet LED or the like can be used as the first light source 220.

[0040] The ultraviolet light emitted from the first light source 220 is preferably UV-C, having a peak wavelength in the range of 100 nm to 280 nm. Among ultraviolet light types, UV-C is highly effective in inactivating viruses captured in filter fibers. Furthermore, when a photocatalytic panel is installed in the air cleaning filter 210, the ultraviolet light emitted from the first light source 220 is preferably UV-A, having a peak wavelength in the range of 315 nm to 400 nm. Among ultraviolet light types, UV-A is highly effective in activating photocatalysts.

[0041] The first light source 220 only needs to include at least one of an ultraviolet LED that irradiates UV-C and an ultraviolet LED that irradiates UV-A, and may include both an ultraviolet LED that irradiates UV-C and an ultraviolet LED that irradiates UV-A. When the first light source 220 includes both an ultraviolet LED that irradiates UV-C and an ultraviolet LED that irradiates UV-A, the ultraviolet LED that irradiates UV-C and the ultraviolet LED that irradiates UV-A may be installed in different positions.

[0042] The first light source 220 may always irradiate the air cleaning filter 210 with ultraviolet light, or may be controlled by the control unit 400. For example, the control unit 400 may cause the first light source 220 to irradiate the air cleaning filter 210 with ultraviolet light when a person is present in the booth 100. Furthermore, the control unit 400 may cause the first light source 220 to irradiate the air cleaning filter 210 with ultraviolet light when the second blower fan 240 is operating.

[0043] The first blower fan 230 operates when a person is present in the booth 100, and can blow a large volume of air into the booth 100. In other words, the first blower fan 230 can circulate air at a volume that can blow away fine particles or viruses attached to the hair, clothing, shoes, etc. of people in the booth 100. The timing and duration of operation of the first blower fan 230 are controlled by the control unit 400.

[0044] The second blower fan 240 operates when no one is present in the booth 100, and can circulate air within the booth 100. The second blower fan 240 is smaller than the first blower fan 230, and the air volume of the second blower fan 240 is smaller than the air volume of the first blower fan 230. Therefore, the second blower fan 240 can constantly circulate air within the booth 100. However, the operation of the second blower fan 240 is not limited to this. The second blower fan 240 may be stopped when no one is present in the booth 100, or may be stopped together with the first blower fan 230 when a person is present in the booth 100.

[0045] The air duct 250 can blow air purified by the air purification filter 210 into the booth 100. That is, the inlet of the air duct 250 is provided on the outlet side of the first blower fan 230 and the second blower fan 240, and the outlet of the air duct 250 is connected to an outlet 260 that communicates with the booth 100. The air blown out from the first blower fan 230 or the second blower fan 240 passes through the air duct 250 and is blown out from the outlet 260.

[0046] The air outlet 260 is connected to the outlet of the air duct 250, and has an opening on the booth 100 side with a diameter smaller than that of the air duct 250. The air that has passed through the air duct 250 is constricted by the opening of the air outlet 260 and blown out into the booth 100.

[0047] The ionizer 270 is installed near the air outlet 260 and can neutralize the static electricity from the air blown out from the air outlet 260. As a result, neutralized air is blown into the booth 100, preventing the reattachment of fine particles or viruses due to static electricity. The number of ionizers 270 is not particularly limited. It is sufficient that the ionizer 270 is installed near at least one of the multiple air outlets 260.

[0048] Here, we will explain the air flow inside the blower unit 200. The arrows in Fig. 3 indicate the air flow.

[0049] The air that has passed through the duct 300 first passes through the air purification filter 210. The space on the inlet side of the air purification filter 210 is separated from the space on the outlet side, and the air purified by the air purification filter 210 is not mixed with the air before purification. In addition, a first light source 220 is disposed on the inlet side of the air purification filter 210, and viruses captured by the air purification filter 210 are inactivated by ultraviolet light emitted from the first light source 220. Therefore, the purified air is air in which live viruses have been reduced.

[0050] The air purification filter 210 is disposed on the intake side of the first blower fan 230 and the second blower fan 240. Therefore, purified air enters the intake port of the first blower fan 230 or the second blower fan 240 and is blown out from the outlet. The air blown out from the outlet of the first blower fan 230 or the second blower fan 240 passes through the air duct 250 and is blown out from the outlet 260 into the booth 100.

[0051] As described above, the air shower apparatus 10 according to one embodiment of the present invention can not only capture fine particles or viruses, but also inactivate or kill the captured viruses by irradiating the air cleaning filter 210 with ultraviolet light from the first light source 220. Therefore, by installing the air shower apparatus 10 at the entrances and exits of a building, it is possible to reduce the number of viruses that enter the building and prevent the spread of infectious diseases within the building.

[0052] Second Embodiment An air shower apparatus 10A according to one embodiment of the present invention will be described with reference to Figures 4 and 5. In the following, if the configuration of air shower apparatus 10A is the same as that of air shower apparatus 10, the description of the configuration of air shower apparatus 10A may be omitted.

[0053] Fig. 4 is a schematic diagram illustrating the interior of an air shower apparatus 10A according to one embodiment of the present invention. As shown in Fig. 4, the air shower apparatus 10A includes a booth 100A, a blower unit 200A, a duct 300, and a control unit 400. In the air shower apparatus 10A, the blower unit 200A is disposed above the ceiling of the booth 100A.

[0054] 4, an air inlet 140A is provided below the side wall of the booth 100A. The air blown into the booth 100A from the air blowing unit 200A is discharged from the air inlet 140A together with the removed particles or viruses. That is, the air inlet 140A is connected to one end of the duct 300. Note that the air inlet 140A may be provided with a filter so as to capture particles larger than those captured by the air cleaning filter 210.

[0055] 5 is a schematic diagram illustrating the configuration of an air blower unit 200A of an air shower apparatus 10A according to one embodiment of the present invention. As shown in FIG. 5, the air blower unit 200A includes an air cleaning filter 210, a first light source 220, a first blower fan 230, a second blower fan 240, an air outlet 260A, and an ionizer 270.

[0056] In the blower unit 200A, an air cleaning filter 210 and a first light source 220 are arranged on each of the first blower fan 230 and the second blower fan 240.

[0057] Here, the flow of air inside the blower unit 200A will be described. The arrows in Fig. 5 indicate the flow of air.

[0058] The air that has passed through duct 300 first passes through first blower fan 230 or second blower fan 240. That is, the air that has passed through duct 300 enters through the intake port of first blower fan 230 or second blower fan 240 and is blown out through the outlet of first blower fan 230 or second blower fan 240.

[0059] The air purification filter 210 is disposed on the outlet side of the first blower fan 230 or the second blower fan 240, and air blown out from the outlet of the first blower fan 230 or the second blower fan 240 passes through the air purification filter 210. The space on the inlet side of the air purification filter 210 is separated from the space on the outlet side, and the air purified by the air purification filter 210 is not mixed with the air before purification. In addition, the first light source 220 is disposed on the outlet side of the air purification filter 210, and viruses captured by the air purification filter 210 are inactivated by ultraviolet light emitted from the first light source 220. Therefore, the purified air is air in which the amount of live viruses has been reduced.

[0060] The air purified by the air cleaning filter 210 is blown out from the air outlet 260A into the booth 100A.

[0061] As described above, the air shower apparatus 10A according to one embodiment of the present invention can not only capture particles or viruses, but also inactivate or kill the captured viruses by irradiating the air cleaning filter 210 with ultraviolet light from the first light source 220. Therefore, by installing the air shower apparatus 10A at the entrances and exits of a building, it is possible to reduce the number of viruses that enter the building and prevent the spread of infectious diseases within the building. <Third embodiment> An air shower apparatus 10B according to one embodiment of the present invention will be described with reference to Figure 6. In the following, if the configuration of the air shower apparatus 10B is the same as that of the air shower apparatus 10, the description of the configuration of the air shower apparatus 10B may be omitted.

[0062] Figure 6 is a schematic diagram illustrating the interior of an air shower apparatus 10B according to one embodiment of the present invention. As shown in Figure 6, the air shower apparatus 10B includes a booth 100B, a blower unit 200B, and a control unit 400. In the air shower apparatus 10B, the blower unit 200B is disposed adjacent to a second side wall of the booth 100B, which is different from the first side wall on which the door 110 is provided.

[0063] 6, a plurality of second light sources 150B are provided in the booth 100B. The second light sources 150B may be provided in the sidewalls or in the ceiling. Alternatively, the second light sources 150B may be embedded in the sidewalls or in the ceiling of the booth 100B.

[0064] The second light source 150B can irradiate ultraviolet light toward a person in the booth 100B. By irradiating ultraviolet light from the second light source 150B toward a person, viruses attached to the person's clothing or blown off the person's clothing can be inactivated. The ultraviolet light irradiated from the second light source 150B preferably has a peak wavelength in the range of 200 nm to 240 nm. Ultraviolet light having a peak wavelength in the range of 200 nm to 240 nm is safe for people and can inactivate viruses. For example, an ultraviolet LED can be used as the second light source 150B.

[0065] The second light source 150B can irradiate the booth 100B with ultraviolet light even when no one is inside the booth 100B. For example, after a person leaves the booth 100B, the second light source 150B can irradiate the booth 100B with ultraviolet light for a predetermined period of time. This makes it possible to inactivate viruses remaining in the booth 100B even after the person has left the booth 100B. The predetermined period of time is 0.1 seconds or more and 900 seconds or less, and preferably 0.1 seconds or more and 180 seconds or less. Irradiating ultraviolet light for this period of time can sufficiently inactivate viruses.

[0066] As shown in FIG. 6, the air blower unit 200B includes an air cleaning filter 210, a first light source 220, a first air blower fan 230B, an air outlet 260B, and an ionizer 270.

[0067] The first blower fan 230B includes a pole-change motor, allowing the fan's rotation speed to be adjusted. In other words, the first blower fan 230B can adjust the airflow. Therefore, the first blower fan 230B can increase the airflow when a person is present in the booth 100B and decrease the airflow when no person is present in the booth 100B. That is, when a person is present in the booth 100B, the first blower fan 230B operates at a first airflow rate that blows away particles and viruses adhering to the person, while normally circulating air at a second airflow rate that is lower than the first airflow rate. Note that the adjustment of the airflow rate of the first blower fan 230B may be controlled by the control unit 400.

[0068] As described above, the second light source 150B can irradiate ultraviolet light onto people in the booth 100B, but the second light source 150B may irradiate ultraviolet light after a person enters the booth 100B and before the first blower fan 230B operates at the first airflow rate. In other words, the second light source 150B may irradiate ultraviolet light while the first blower fan 230B is operating at the second airflow rate.

[0069] The operation of first blower fan 230B is not limited to the above. First blower fan 230B may be stopped when no one is in booth 100B, or when a person is in booth 100B. For example, when a person is in booth 100B, first blower fan 230B may be stopped while ultraviolet light is being irradiated from second light source 150B toward the person.

[0070] Air outlet 260B is provided in the ceiling or side wall of booth 100. Air inlet 140B is provided in the floor of booth 100B. In addition, air inlet 140B is provided below or at the bottom of a second side wall of booth 100B. Air blown from blower unit 200B is blown into booth 100B through air outlet 260B and is discharged from air inlet 140B together with the removed fine particles or viruses. Air inlet 140B may be connected to blower unit 200B directly or via a duct.

[0071] Here, the flow of air inside the blower unit 200B will be described. The arrows in Fig. 6 indicate the flow of air.

[0072] The air discharged from air inlet 140B in the floor passes through an opening provided in the side wall, merges with the air discharged from air inlet 140B in the side wall, and passes through first blower fan 230B. That is, the air discharged from air inlet 140B enters the intake port of first blower fan 230B and is blown out from the outlet port of first blower fan 230B.

[0073] The air purification filter 210 is disposed on the outlet side of the first blower fan 230B, and air blown out from the outlet of the first blower fan 230B passes through the air purification filter 210. The space on the inlet side of the air purification filter 210 is separated from the space on the outlet side, and the air purified by the air purification filter 210 is not mixed with the air before purification. In addition, the first light source 220 is disposed on the outlet side of the air purification filter 210, and viruses captured by the air purification filter 210 are inactivated by ultraviolet light emitted from the first light source 220. Therefore, the purified air is air in which live viruses have been reduced.

[0074] The air purified by the air cleaning filter 210 is blown out from the air outlet 260B into the booth 100B.

[0075] As described above, the air shower apparatus 10B according to one embodiment of the present invention can not only capture particles or viruses, but also inactivate or kill the captured viruses by irradiating the air cleaning filter 210 with ultraviolet light from the first light source 220. Furthermore, the air shower apparatus 10B can inactivate viruses attached to or blown off the clothing of people in the booth 100B by irradiating the people with ultraviolet light from the second light source 150B. Therefore, installing the air shower apparatus 10B at the entrances and exits of a building can reduce the number of viruses entering the building and prevent the spread of infectious diseases within the building.

[0076] The embodiments of the present invention can be implemented by appropriately combining configurations as long as they are not mutually inconsistent. For example, the second light source 150B described in the third embodiment may be installed in the air shower apparatus 10 according to the first embodiment or the air shower apparatus 10A according to the second embodiment. In this case, the second blower fan 240 may be stopped for a predetermined time while a person is inside the booth 100 or booth 100A. Specifically, while ultraviolet light is being emitted from the second light source 150B, the second blower fan 240 and the first blower fan 230 may be stopped. In this case, air is not circulated inside the booth 100 or booth 100A, preventing the dispersion of particles or viruses attached to people's clothing, and the ultraviolet light emitted from the second light source 150B effectively inactivates viruses.

[0077] Furthermore, any product in which a person skilled in the art has appropriately added or deleted configurations or modified designs based on the embodiments, or added or omitted processes or modified conditions, is also included within the scope of the present invention as long as it contains the essence of the present invention.

[0078] Even if there are other effects and advantages different from those brought about by the above-described embodiments, those that are clear from the description in this specification or that can be easily predicted by a person skilled in the art are naturally understood to be brought about by the present invention. [Explanation of symbols]

[0079] 10, 10A, 10B: air shower device, 100, 100A, 100B: booth, 110: door, 120: grating, 130: sensor, 140A, 140B: air inlet, 150B: second light source, 200, 200A, 200B: air blower unit, 210: air cleaning filter, 220: first light source, 230, 230B: first air blower fan, 240: second air blower fan, 250: air blower duct, 260, 260A, 260B: air outlet, 270: ionizer

Claims

1. a booth including a door on the first side wall portion through which people can enter and exit; a blowing unit that blows air into the booth, The blower unit is a first blower fan that operates when the person is in the booth; a second blower fan that is smaller than the first blower fan and circulates the air; an air cleaning filter that purifies the air; a first light source that irradiates the air cleaning filter with ultraviolet light; an air outlet provided in a ceiling portion of the booth, which blows the air blown out from the first blower fan and the second blower fan into the booth; the air cleaning filter is disposed below the first blower fan and on the side of an intake port of the first blower fan, The air shower device, wherein the air outlet is located below the air cleaning filter.

2. Further, a second light source for illuminating the interior of the booth is included; 2. The air shower apparatus according to claim 1, wherein the second light source irradiates ultraviolet light having a peak wavelength in the range of 200 nm to 240 nm.

3. 3. The air shower apparatus according to claim 2, wherein the ultraviolet light from the second light source is emitted when the first blower fan and the second blower fan are stopped.

4. a booth including a door on the first side wall portion through which people can enter and exit; a blowing unit that blows air into the booth, The blower unit is a first blower fan that is switchable between a first air volume that operates when the person is in the booth and a second air volume that is smaller than the first air volume and that constantly circulates air; an air cleaning filter that purifies the air; a first light source that irradiates the air cleaning filter with ultraviolet light; an air outlet provided in a ceiling portion of the booth, which blows the air blown out from the first blower fan into the booth; an ionizer provided in the vicinity of the air outlet, the air cleaning filter is disposed below the first blower fan and on the side of an intake port of the first blower fan, The air shower device, wherein the air outlet is located below the air cleaning filter.

5. Further, a second light source for illuminating the interior of the booth is included; 5. The air shower apparatus according to claim 4, wherein the second light source irradiates ultraviolet light having a peak wavelength in the range of 200 nm to 240 nm.

6. 6. The air shower apparatus according to claim 5, wherein the ultraviolet light from the second light source is emitted when the first airflow rate and the second airflow rate are not operating.

7. 6. The air shower apparatus according to claim 2, wherein the ultraviolet light from the second light source is emitted at least either when the person enters the room or at a predetermined time after the person leaves the room.

8. 8. The air shower apparatus according to claim 7, wherein the predetermined time is equal to or greater than 0.1 seconds and equal to or less than 900 seconds.

9. 9. The air shower apparatus according to claim 1, wherein the first blower fan of the blower unit is disposed above a ceiling of the booth.

10. 10. The air shower apparatus according to claim 1, wherein the first light source is disposed on an inlet side of the air cleaning filter.

11. 10. The air shower apparatus according to claim 1, wherein the first light source is disposed on an outlet side of the air cleaning filter.

12. 12. The air shower apparatus according to claim 1, wherein the ultraviolet light emitted from the first light source is UV-C.

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