JP2022054721A - Ultraviolet lamp - Google Patents

Abstract

To provide an ultraviolet lamp having a structural configuration of more secured safety in a portable ultraviolet lamp radiating light including ultraviolet ray (for example UVC wave) of a shorter wave length incapable of sensing with human eye.SOLUTION: An ultraviolet lamp 100 is a portable ultraviolet lamp having a light source unit for radiating light containing ultraviolet rays having wavelengths of 300 nm or shorter. The light source unit comprises a first light emitting member for radiating ultraviolet rays, a housing that houses the first light emitting member inside and has a light emitting window for radiating ultraviolet rays emitted from the first light source, and a second light emitter that radiates visible light from the light emitting window or the proximity of the light emitting window. The second light emitter radiates visible light with brightness of 1000 cd/m2 or more.SELECTED DRAWING: Figure 1

Description

The present invention relates to an ultraviolet irradiation device that irradiates ultraviolet rays, and more particularly to a portable ultraviolet irradiation device.

Microorganisms (bacteria, fungi, etc.) and viruses that exist in space or on the surface of objects can cause infectious diseases to humans and non-human animals, and there is concern that the spread of infectious diseases may threaten people's lives. .. Infectious diseases are particularly likely to spread in places where people frequently gather, such as medical facilities, schools, government offices, and vehicles such as automobiles, trains, buses, airplanes, and ships, and places where people come and go.
As a countermeasure against infectious diseases, it is important to block the transmission route of microorganisms and viruses. In particular, contact infection through common objects such as doorknobs, handrails, and switches is one of the main infection routes, and effective countermeasures are desired.

Conventionally, microorganisms and viruses existing in space or on the surface of an object are inactivated by irradiating them with ultraviolet rays.
For example, Patent Document 1 discloses a portable sterilizing lighting device that can be carried. This sterilization lighting device is provided with a sterilization lamp unit capable of irradiating ultraviolet rays and a grip portion capable of being held by hand, and can immediately sterilize a target object.
Further, for example, in Patent Document 2, as an ultraviolet irradiation device used for sterilization, a first discharge lamp that emits ultraviolet rays and a second discharge lamp that emits visible light for confirming the lighting of the first discharge lamp are described. An ultraviolet irradiation device comprising the above is disclosed.

Japanese Unexamined Patent Publication No. 2012-08537 Japanese Unexamined Patent Publication No. 2020-099524

In the technique described in Patent Document 1, a safety device is provided to shut off the power supply when the housing is turned at a predetermined angle with respect to a normal position so that the user's eyes are not irradiated with ultraviolet rays. However, it is possible for the user to look into the ultraviolet lamp in the normal position, which is not sufficient as a safety measure. In addition, since it is not possible to irradiate the sterilized object with ultraviolet rays from various angles, the places (things) that can be sterilized are limited.

Further, in the technique described in Patent Document 2, it is possible to easily confirm whether or not ultraviolet rays are irradiated by visually recognizing visible light, but when the ultraviolet rays are unintentionally irradiated to the eyes, it is a humor. There is a risk that you will not be able to take repellent actions and will continue to see ultraviolet rays.
Even if ultraviolet rays are less harmful to humans, the amount of irritation to the eyes increases as the intensity (illuminance) of the light increases, so it is not preferable that the light continues to irradiate the eyes for a long period of time.

Therefore, an object of the present invention is to provide an ultraviolet irradiation device having a device configuration that ensures more safety in a portable ultraviolet irradiation device that emits ultraviolet rays having a short wavelength that cannot be perceived by the human eye.

In order to solve the above problems, one aspect of the ultraviolet irradiation device according to the present invention is a portable ultraviolet irradiation device provided with a light source unit that emits light including light having a wavelength of 300 nm or less, and the light source unit is a portable ultraviolet irradiation device. A housing having a first light emitting body that radiates the ultraviolet rays, a light emitting window that houses the first light emitting body and emits the ultraviolet rays emitted from the first light emitting body, and the light emitting window or A second light emitting body that emits visible light from the vicinity of the light emitting window is provided, and the second light emitting body emits visible light having a brightness of 1000 cd / m ² or more.

In this way, visible light with a brightness that can be perceived as dazzling by a person is emitted from a light emitting window or its vicinity that emits ultraviolet rays having a wavelength of 300 nm or less, which is difficult for the human eye to perceive. As a result, when the user of this portable ultraviolet irradiation device irradiates the human eye with visible light, for example, when the light emitting window is directed in an arbitrary direction, the person takes a repellent action. be able to. Therefore, it is possible to prevent the ultraviolet rays radiated from the light emitting window from being continuously observed for a long time.

Further, in the above-mentioned ultraviolet irradiation device, the second light emitter may emit visible light having a brightness of 60,000 cd / m ² or less. In this case, since the visible light can be emitted by using the LED as the second light emitting body, it is possible to make a small ultraviolet irradiation device.
Further, in the above-mentioned ultraviolet irradiation device, the second light emitter may emit visible light having a brightness of 20000 cd / m ² or less. In this case, even in a bright environment, it is possible to radiate light that makes people feel dazzling enough, and it is possible to take appropriate repellent actions.

Further, one aspect of the ultraviolet irradiation device according to the present invention is a portable ultraviolet irradiation device provided with a light source unit that radiates light including light having a wavelength of 300 nm or less, and the light source unit emits the ultraviolet rays. A housing having a first light emitting body, a housing having a light emitting window for accommodating the first light emitting body and radiating the ultraviolet rays emitted from the first light emitting body, and the vicinity of the light emitting window or the light emitting window. The second illuminant is provided with a second illuminant that radiates visible light from, and the second illuminant radiates visible light having a UGR value of 25 or more.

In this way, visible light having a brightness that can be perceived by humans as unpleasant is emitted from a light emitting window or its vicinity that emits ultraviolet rays having a wavelength of 300 nm or less, which is difficult for the human eye to perceive. As a result, when the user of this portable ultraviolet irradiation device irradiates the human eye with visible light, for example, when the light emitting window is directed in an arbitrary direction, the person takes a repellent action. be able to. Therefore, it is possible to prevent the ultraviolet rays radiated from the light emitting window from being continuously observed for a long time.

Further, in the above-mentioned ultraviolet irradiation device, the second light emitter may emit visible light having a UGR value of 28 or more.
In this case, light that is extremely unpleasant to humans can be emitted from the light emitting window or its vicinity. Therefore, it is possible to take a repellent action more reliably.

Further, in the above-mentioned ultraviolet irradiation device, the first light emitter may emit light having a peak wavelength in the wavelength range of 190 nm to 235 nm.
In this case, it is possible to effectively inactivate microorganisms and viruses while suppressing the adverse effects on the human body due to ultraviolet irradiation.

Further, in the above-mentioned ultraviolet irradiation device, the light emitting window may be provided with an optical filter that blocks the transmission of ultraviolet rays having a wavelength longer than 235 nm.
In this case, it is possible to use an ultraviolet irradiation device that radiates only light in a wavelength range that has little adverse effect on the human body.

Further, in the above-mentioned ultraviolet irradiation device, the second light emitting body may be arranged in the vicinity of the light emitting window on the outer surface of the housing.
In this case, visible light can be emitted from the vicinity of the light emitting window. Since visible light is emitted from a light emitting window different from that of ultraviolet rays, visible light can be emitted without passing through, for example, an optical filter provided in the light emitting window for ultraviolet rays.

Further, in the above-mentioned ultraviolet irradiation device, the second light emitting body may be arranged at four corners of the outer periphery of the light emitting window on the outer surface of the housing.
In this case, the user can easily recognize that the ultraviolet irradiation region exists inside the quadrangular region connecting the four visible lights.

Furthermore, in the above-mentioned ultraviolet irradiation device, the second light emitting body may be arranged so as to surround the outer periphery of the light emitting window on the outer surface of the housing.
In this case, the user can easily recognize that the area surrounded by the visible light is the ultraviolet irradiation area.

Further, in the above-mentioned ultraviolet irradiation device, the second light emitting body may be arranged in the vicinity of the first light emitting body inside the housing.
In this case, since the second light emitting body is housed inside the housing together with the first light emitting body, it is not necessary to separately provide a light emitting window dedicated to the second light emitting body in the housing. Further, since visible light having high brightness can be emitted from the light emitting window, it is possible to appropriately prevent the light emitting window from being visually recognized.

According to one aspect of the present invention, in a portable ultraviolet irradiation device that emits ultraviolet rays having a short wavelength that cannot be perceived by the human eye, it is possible to provide an ultraviolet irradiation device having a device configuration that ensures more safety. ..

It is an appearance image figure of the ultraviolet irradiation apparatus of this embodiment. It is a gripping image figure of the ultraviolet irradiation apparatus of this embodiment. It is a schematic diagram of the internal structure of the light source part provided in the ultraviolet irradiation apparatus. It is a schematic diagram which shows another example of the ultraviolet irradiation apparatus. It is explanatory drawing of the position index. It is explanatory drawing of a solid angle. This is an example of arrangement of the second illuminant. This is an example of arrangement of the second illuminant. This is an example of arrangement of the second illuminant.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an external image diagram of the ultraviolet irradiation device 100 according to the present embodiment. Further, FIG. 2 is a grasping image diagram of the ultraviolet irradiation device 100.
The ultraviolet irradiation device 100 is a portable irradiation device provided with a light source unit that emits light including ultraviolet rays having a wavelength of 300 nm or less. For example, the ultraviolet irradiation device 100 irradiates a surface or space in a facility or vehicle with ultraviolet rays having a wavelength that inactivates microorganisms and / or viruses, and exists at least on the surface or space in the facility or vehicle. It can be a portable inactivating device that inactivates microorganisms and viruses that are harmful to the human body or animals.

The term "portable" as used herein does not mean that it only needs to be portable, but means that the user 200 can easily carry it with one hand (handheld type configuration).
In addition, "inactivation" refers to killing microorganisms and viruses (or losing infectivity and toxicity).

DNA (deoxyribonucleic acid) possessed by microorganisms and viruses has an ultraviolet absorption band near a wavelength of 260 nm, and by irradiating light with this wavelength, the DNA undergoes photochemical reactions such as hydration, dimer formation, and decomposition. It is known that it can inactivate microorganisms (bacteria and molds) and viruses. On the other hand, the absorption coefficient of DNA for ultraviolet rays having a wavelength exceeding 300 nm is 0. That is, it is said that ultraviolet rays having a wavelength exceeding 300 nm do not have an inactivating effect due to light absorption of DNA. Therefore, ultraviolet rays having a diameter of 300 nm or less are widely used for inactivating applications.

As shown in FIG. 1, the ultraviolet irradiation device 100 includes a housing 11. The housing 11 is formed with an opening 11a that serves as a light emitting window that radiates ultraviolet rays. The opening 11a is provided with a window member 12 made of, for example, quartz glass. Further, the opening 11a may be provided with an optical filter or the like that blocks unnecessary light.
The housing 11 is provided with an instruction unit (start button) 13 for the user 200 to instruct the lighting of the light source unit. As shown in FIG. 2, the instruction unit 13 is arranged, for example, on the side surface of the housing 11 so that the user 200 can operate it with the thumb of the hand holding the housing 11.

Further, a connection line (cord) 14 electrically connected to a power supply unit (not shown) extends from the housing 11. The power supply unit is attached to a first light emitting body 20 (see FIG. 3), which will be described later, housed inside the housing 11, and a second light emitting body 30 provided in the vicinity of a light emitting window on the outer surface of the housing 11. On the other hand, power is supplied via the connection line 14.

As shown in FIG. 3, the first light emitting body 20 is housed inside the housing 11. In FIG. 3, the window member 12 is not shown for convenience of explanation.
The first light emitter 20 emits light containing ultraviolet rays having a wavelength of 300 nm or less, for example, light having a peak wavelength in the wavelength range of 190 nm to 235 nm. The first light emitter 20 can be, for example, an excimer lamp.

In UV radiation, the penetrating power of cells differs depending on the wavelength, and the lower the wavelength, the smaller the penetrating power. For example, UV radiation with a low wavelength, such as about 200 nm, passes through water very efficiently, but is highly absorbed by the outer part (cytoplasm) of human cells and is sufficient to reach the cell nucleus containing radiation-sensitive DNA. May have no energy. Therefore, the above-mentioned low-wavelength UV radiation has little adverse effect on human cells. On the other hand, ultraviolet rays having a wavelength of more than 240 nm can damage DNA in human cell nuclei. Further, it is known that ultraviolet rays having a wavelength of less than 190 nm generate ozone.
Therefore, in the present embodiment, as the first light emitting body 20, an ultraviolet light source that emits ultraviolet rays having a peak wavelength in the wavelength range of 190 nm to 235 nm, which has little adverse effect on the human body and can obtain an inactivating effect, is used.

The excimer lamp 20 includes a straight tubular discharge container 21 in which both ends are hermetically sealed. The discharge container 21 can be made of, for example, quartz glass. Further, the inside of the discharge container 21 is filled with a rare gas and a halogen as light emitting gas. In this embodiment, a KrCl excimer lamp using krypton chloride (KrCl) gas is used. In this case, the central wavelength of the obtained synchrotron radiation is 222 nm.
The luminescent gas is not limited to the above. For example, krypton bromide (KrBr) gas or the like can be used as the luminescent gas. In the case of a KrBr excimer lamp, the central wavelength of the obtained synchrotron radiation is 207 nm.
Further, in FIG. 3, the ultraviolet irradiation device 100 includes a plurality of (three) excimer lamps, but the number of excimer lamps is not particularly limited.

A pair of electrodes (first electrode 22 and second electrode 23) are arranged so as to abut on the outer surface of the discharge container 21. The first electrode 22 and the second electrode 23 are arranged on the side surface (the surface in the −Z direction) opposite to the light extraction surface of the discharge container 21 so as to be separated from each other in the tube axis direction (Y direction) of the discharge container 21. Has been done.
The discharge container 21 is arranged so as to straddle the two electrodes 22 and 22 while in contact with each other. Specifically, a concave groove is formed in the two electrodes 22 and 23, and the discharge container 21 is fitted in the concave groove of the electrodes 22 and 23.

Of the pair of electrodes, one electrode (for example, the first electrode 22) is the high voltage side electrode, and the other electrode (for example, the second electrode 23) is the low voltage side electrode (ground electrode). By applying a high frequency voltage between the first electrode 22 and the second electrode 23, an excited dimer is generated in the internal space of the discharge container 21, and excimer light having a center wavelength of 222 nm is emitted from the light extraction surface of the excimer lamp 20. Be radiated.

The light extraction surface of the excimer lamp 20 is arranged so as to face the light emission window. Therefore, the light emitted from the excimer lamp 20 is emitted from the ultraviolet irradiation device 100 through the light emitting window.
Here, the electrodes 22 and 23 may be made of a metal member having reflectivity to the light emitted from the excimer lamp 21. In this case, the light radiated from the discharge container 21 in the −Z direction can be reflected and traveled in the + Z direction.

As described above, an optical filter can be provided in the opening 11a serving as the light emitting window. The optical filter transmits, for example, light having a wavelength range of 190 nm to 235 nm (more preferably light having a wavelength range of 200 nm to 230 nm) having less adverse effect on the human body, and cuts other ultraviolet rays (light in the UVC wavelength range). It can be a wavelength selection filter.
As the wavelength selection filter, for example, an optical filter having a dielectric multilayer film composed of _two layers of HfO and _two layers of SiO can be used.

As the wavelength selection filter, an optical filter having a dielectric multilayer film composed of _two layers of SiO and _three layers of _Al2O can also be used.
However, when an optical filter having a dielectric multilayer film consisting of two HfO layers and _two layers of SiO was used as the wavelength selection filter _, an optical filter having a dielectric multilayer film consisting of _two layers of SiO and _two layers of _Al2O was used. Compared with the case, the total number of layers can be reduced. Therefore, it is possible to increase the transmittance of ultraviolet rays when the incident angle is 0 °.
By providing the optical filter in the light emitting window in this way, even if a small amount of light harmful to humans is emitted from the excimer lamp 20, the light leaks to the outside of the housing 11. It can be suppressed more reliably.

In the present embodiment, as shown in FIGS. 1 to 3, the case where electric power is supplied from the external power source to the light source unit via the connection line 14 has been described, but the ultraviolet irradiation device has a built-in battery. May be good. In this case, as in the ultraviolet irradiation device 100A shown in FIG. 4, a battery accommodating portion 15 is provided in the housing 11, and power is supplied from the battery housed inside the housing 11 to the first light emitting body 20, the second light emitting body 30, and the like. May be supplied.

As described above, the ultraviolet irradiation device 100 in the present embodiment radiates ultraviolet rays in the wavelength range of 190 nm to 235 nm. Ultraviolet rays in this wavelength range are light that has little adverse effect on the human body. However, even if the light is not harmful to humans, the amount of irritation to the eyes increases as the intensity (illuminance) of the light increases, so that it is not preferable to continue irradiating the eyes with the light.

According to ACGIH (American Conference of Governmental Industrial Hygienists) and JIS Z 8812 (measurement method of harmful ultraviolet radiation), the amount of ultraviolet rays irradiated to the human body per day (8 hours) is. An allowable limit value (TLV: Threshold Limit Value) is set for each wavelength. This permissible limit value may be revised in the future, but it is important that the irradiation amount of ultraviolet rays does not exceed the permissible limit value.

The ultraviolet irradiation device 100 of the present embodiment can be held by the user 200 and can irradiate a desired space or surface (floor, ceiling, doorknob, handrail, switch, etc.) with ultraviolet rays. On the other hand, since the user 200 can handle it freely, it is not possible to limit the operation of looking into the vicinity of the light emitting window. Here, if it is strong visible light, it can be perceived as dazzling when visually recognized, but ultraviolet rays (UVC waves) that can effectively inactivate microorganisms and viruses are in a wavelength range that deviates from human visual sensitivity and are strong. Even UV intensity cannot be perceived by the human eye. Therefore, even if the above-mentioned ultraviolet rays are applied to the eyes during the inactivation work, the user 200 may not take a repellent action and may continue to see even strong UV light.

Therefore, as shown in FIGS. 1 and 3, the ultraviolet irradiation device 100 in the present embodiment includes a second light emitting body 30 which is a visible light source having high brightness in the vicinity of the light emitting window (ultraviolet irradiation surface). The second illuminant 30 is controlled to emit visible light at least while the first illuminant 20 is radiating ultraviolet light.
The first light emitting body 20 and the second light emitting body 30 may be driven by using a common wiring system or may be driven by using individual wiring systems. Further, for example, an abnormality detection unit for detecting an abnormality in the second light emitting body 30 may be provided, and when an abnormality in the second light emitting body 30 is detected, lighting of the first light emitting body 20 may be restricted.

Here, the second light emitter 30 is, for example, an LED, and emits visible light having a brightness of, for example, 1000 cd / m ² or more.
Visible light having a brightness of 1000 cd / m ² or more can be perceived as dazzling light by a person even in a room with general brightness. In this way, by radiating highly bright visible light from the vicinity of the ultraviolet irradiation surface, the user can take a repellent action so as not to continue to visually recognize the ultraviolet irradiation surface. As a result, it is possible to prevent the user's eyes from being irradiated with ultraviolet rays for a long time.

In addition, as an index for evaluating unpleasant glare (discomfort caused by glare), there is an index called UGR (Unified Glare Rating) recommended by the CIE (Commission Internationale de l'Eclairage).
The details of the calculation method of the UGR value are specified in CIE117: 1995.

Here, L _b is the background brightness (cd / m ² ), L is the brightness (measured value) of the light emitting portion of each lighting fixture received by the observer, and ω is the light emitting portion of each lighting fixture as seen by the observer. The solid angle (Sr) and P are Guth position indexes of each luminaire. When there are a plurality of target light emitting portions, the calculated values at the positions of the light emitting portions are added together to determine the UGR value.
The position index P is calculated using the parameters T / R and H / R, where T is the horizontal displacement from the line of sight, H is the vertical displacement from the line of sight, and R is the distance to the observer's eye. be able to.

Then, assuming a single portable type (portable type) lamp, the UGR calculation formula of the above formula (1) is rewritten as follows.

Here, the position index is set to P = 7.
As shown in FIG. 5, in the usage scene of the ultraviolet irradiation device 100 of the present embodiment, the horizontal displacement T from the line of sight, that is, the displaceable range from the user's eye 201 to the ultraviolet irradiation device 100 held by the hand 202. The maximum horizontal distance within 300 can be 1 m. Further, the vertical method displacement H from the line of sight, that is, the maximum vertical distance within the displaceable range 300 from the user's eye 201 to the ultraviolet irradiation device 100 held by the hand 202 can be 1 m. Further, the distance R from the observer's eye, that is, the distance between the gazing point P and the observer's eye 201 can be 1 m.
From the above conditions, T / R = 1 and H / R = 1 can be set. When the position index is read with reference to the calculation table specified in CIE117: 1995 using these parameters T / R and H / R, P = 7.

Further, as shown in FIG. 6, the solid angle ω is based on the glare at a position of 45 degrees (θ = 45 degrees) from the light emitting surface (window member 12, second light emitting body 22) of the ultraviolet irradiation device 100. The solid angle (Sr) of the lamp as seen from the position of the observer's eyes was determined as follows.
ω = 2π (1-cosθ) = 1.84

The Commission Internationale de l'Eclairage (CIE) has presented the following criteria for the relationship between the UGR stage and glare.

Therefore, the brightness L of the second light emitter 30 may be determined so that the UGR calculated by the above equation (2) is 25 or more, preferably 28 or more. This can create a dazzling situation for humans.
In the case of the portable ultraviolet irradiation device 100, since the user selects the area to be sterilized / inactivated and irradiates the ultraviolet rays, it is expected to be used in a bright environment.
Therefore, it is generally desirable to determine the brightness L of the second light emitter 30 so that the UGR value is 25 or more with the background brightness L _b = 20 cd / m ² in consideration of the environment illuminated by visible light. In this case, the UGR calculation formula can be UGR = 8log [(4.70 × 10 ^-4 ) · L ² ], and in that case, the brightness of the second illuminant 30 so that the UGR value is 25 or more. It is desirable to determine L. Therefore, it is desirable that the brightness L of the second light emitter 30 is 1685 cd / m ² or more.

Further, it is desirable that the UGR value of 25 or more can be satisfied even in a brighter environment, and the case where the background brightness L _b is 20 cd / m ² or more may be used as a reference.
For example, the brightness L of the second light emitter 30 may be determined so that the UGR value is 25 or more when the background brightness Lb = 50 cd / m ² . In this case, the UGR calculation formula can be UGR = 8log [(1.88 × 10 ^-4 ) · L ² ], and in that case, the brightness of the second illuminant 30 so that the UGR value is 25 or more. It is desirable to determine L. Therefore, it is desirable that the brightness L of the second light emitter 30 is 2665 cd / m ² or more.
Further, the brightness L of the second light emitter 30 may be determined so that the UGR value is 25 or more when the background brightness L _b = 100 cd / m ² . In this case, the UGR calculation formula can be UGR = 8log [(9.39 × ^10-5 ) · L ² ], and in that case, the brightness of the second illuminant 30 so that the UGR value is 25 or more. It is desirable to determine L. Therefore, it is desirable that the brightness L of the second light emitter 30 is 3769 cd / m ² or more.

Further, the upper limit of the background brightness L _b may be assumed to be 400 cd / m ² , and the upper limit of the UGR value may be set to 31. When the background brightness L _b = 400 cd / m ² and the UGR value is 31, the brightness L of the second light emitter 30 is 17873 cd / m ² . Therefore, the upper limit of the brightness L of the second light emitter 30 may be 20,000 cd / m ² . As a result, it is possible to radiate light that makes people feel dazzling even in a brighter environment, and it is possible to take appropriate repellent actions.
As the high-luminance LED, there is also one having a brightness of 60,000 cd / cm ² . Therefore, the upper limit of the brightness of the second light emitter 30 can be 60,000 cd / cm ² .

As described above, the ultraviolet irradiation device 100 in the present embodiment includes a light source unit that emits light including ultraviolet rays having a wavelength of 300 nm or less. Here, the light source unit is from the vicinity of the first light emitting body 20 that radiates ultraviolet rays having a wavelength of 300 nm or less, the housing 11 that houses the first light emitting body 20 inside, and the light emitting window provided in the housing 11. A second light emitting body 30 that emits visible light is provided. Specifically, the first light emitter 20 emits light having a peak wavelength in the wavelength range of 190 nm to 235 nm. Further, the second light emitter 30 emits visible light having a brightness of 1000 cd / m ² or more or a UGR value of 25 or more.

As described above, the ultraviolet irradiation device 100 allows a person to feel dazzling in the vicinity of a light emitting window that emits ultraviolet rays having a wavelength of 300 nm or less, which is difficult for the human eye to perceive, and causes discomfort caused by the glare. A visible light source that emits visible light with high brightness that can be given is installed side by side.
Therefore, when the user carries the ultraviolet irradiation device 100 and irradiates the ultraviolet rays with the light emitting window directed in an arbitrary direction, when the visible light is irradiated to the human eye, the person takes a repellent action. be able to. Therefore, it is possible to prevent the ultraviolet rays radiated from the light emitting window from being continuously observed for a long time.
In addition, since the means for causing a person to take a repellent action as described above is provided, for example, it is necessary to provide a means for regulating the posture (use angle) of the ultraviolet irradiation device so that the human eye is not irradiated with the ultraviolet rays. not. Therefore, the convenience is not impaired.

Further, in the ultraviolet irradiation device 100 of the present embodiment, the first light emitter 20 can emit light having a peak wavelength in the wavelength range of 190 nm to 235 nm. Therefore, it is possible to effectively inactivate microorganisms and viruses while suppressing the adverse effects on the human body due to ultraviolet irradiation.
Here, if the light emitting window is provided with an optical filter that blocks the transmission of ultraviolet rays on the wavelength side longer than 235 nm, it is possible to obtain an ultraviolet irradiation device that emits only light in a wavelength range that has little adverse effect on the human body. .. In this case, even if the person is irradiated with ultraviolet rays emitted from the light emitting window during the reaction time from the time when the user or a person existing around the user visually recognizes the visible light to the time when the person takes a repellent action. , Damage to the human body can be reduced.

As described above, the ultraviolet irradiation device 100 in the present embodiment can be an ultraviolet irradiation device having a device configuration in which safety is more ensured.

(Modification example)
In the above embodiment, as shown in FIG. 1, a case where only one second light emitting body 30 is arranged in the vicinity of the light emitting window on the outer surface of the housing 11 has been described. However, the arrangement of the second illuminant 30 is not limited to the above.
For example, as in the ultraviolet irradiation device 100B shown in FIG. 7, the second light emitters 30 may be arranged one by one at the four corners of the outer periphery of the light emitting window on the outer surface of the housing 11. In this case, the user of the ultraviolet irradiation device 100B can easily recognize that the ultraviolet irradiation region exists inside the rectangular region connecting the four visible lights.
When a plurality of second light emitting bodies 30 are arranged, the total brightness of the plurality of second light emitting bodies 30 is 1000 cd / m ² or more, or the UGR is calculated from the total brightness of the plurality of second light emitting bodies 30. It is assumed that the value is 25 or more.

Further, as in the ultraviolet irradiation device 100C shown in FIG. 8, the second light emitting body 30 may be arranged so as to surround the outer periphery of the light emitting window on the outer surface of the housing 11. In this case, the user of the ultraviolet irradiation device 100C can easily recognize that the region surrounded by the visible light is the ultraviolet irradiation region.
Further, as in the ultraviolet irradiation device 100D shown in FIG. 9, the second light emitting body 30 may be arranged in the vicinity of the first light emitting body 20 inside the housing 11. For example, the second light emitting body 30 can be arranged between the plurality of discharge containers 21 of the first light emitting body (excimer lamp) 20 and between the first electrode 22 and the second electrode 23. In this case, ultraviolet rays and visible light are emitted from the light emitting window of the ultraviolet irradiation device 100D. Since the second light emitting body 30 is housed inside the housing 11 together with the first light emitting body 20, it is not necessary to separately provide a light emitting window dedicated to the second light emitting body 30 in the housing 11.

Further, in the above embodiment, the case where the excimer lamp, which is the first light emitting body 20, has a configuration in which a pair of electrodes 22 and 23 are arranged on one side surface of the discharge container 21 as shown in FIG. 3 has been described. However, the configuration of the excimer lamp is not limited to the above.
For example, a pair of annular electrodes (first electrode, second electrode) may be arranged at both ends of a long discharge container. Further, the structure has an inner electrode (first electrode) inside the long discharge container and a mesh-shaped (mesh-shaped) or linear outer electrode (second electrode) on the outer wall surface of the discharge container. May be good. Further, as another example, a so-called "flat tube structure" may be adopted in which a first electrode and a second electrode are provided on two opposite outer surfaces of the flat discharge container, respectively. Further, a so-called "double tube structure" consisting of a cylindrical outer tube and a cylindrical inner tube may be adopted. In this case, a network-like first electrode (external electrode) and a film-like second electrode (internal electrode) may be arranged on the outer surface of the outer tube and the inner surface of the inner tube, respectively.

Further, in the above embodiment, the case where the excimer lamp is used as the first light emitting body 20 has been described, but the LED can also be used as the first light emitting body 20.
As the LED, for example, an aluminum nitride gallium (AlGaN) -based LED, an aluminum nitride (AlN) -based LED, or the like can be adopted. Here, as the AlGaN-based LED, it is preferable to adjust the composition of Al so that the center wavelength is in the range of 190 to 235 nm. The AlN-based LED emits ultraviolet rays having a peak wavelength of 210 nm.

Further, in the above embodiment, the case where the LED is used as the second light emitting body 30 has been described, but the second light emitting body 30 may be a light source capable of radiating visible light, and may be a lamp light source, a laser light source, or an EL light source. There may be.

11 ... Housing, 12 ... Window member, 13 ... Indicator, 14 ... Connection, 15 ... Battery housing, 20 ... First illuminant, 21 ... Discharge container, 22 ... First electrode, 23 ... Second electrode, 30 ... second illuminant, 100 ... ultraviolet irradiation device, 200 ... user

Claims (11)

It is a portable ultraviolet irradiation device equipped with a light source unit that emits light including ultraviolet rays having a wavelength of 300 nm or less.
The light source unit is
The first illuminant that radiates ultraviolet rays and
A housing having a light emitting window for accommodating the first light emitting body and radiating the ultraviolet rays emitted from the first light emitting body, and a housing.
A second light emitter that emits visible light from the light emitting window or the vicinity of the light emitting window is provided.
The second light emitter is an ultraviolet irradiation device characterized by emitting visible light having a brightness of 1000 cd / m ² or more. The ultraviolet irradiation device according to claim 1, wherein the second light emitter emits visible light having a brightness of 60,000 cd / m ² or less. The ultraviolet irradiation device according to claim 1, wherein the second light emitter emits visible light having a brightness of 20000 cd / m ² or less. It is a portable ultraviolet irradiation device equipped with a light source unit that emits light including ultraviolet rays having a wavelength of 300 nm or less.
The light source unit is
The first illuminant that radiates ultraviolet rays and
A housing having a light emitting window for accommodating the first light emitting body and radiating the ultraviolet rays emitted from the first light emitting body, and a housing.
A second light emitter that emits visible light from the light emitting window or the vicinity of the light emitting window is provided.
The second illuminant is an ultraviolet irradiation device that emits visible light having a UGR value of 25 or more. The ultraviolet irradiation device according to claim 4, wherein the second light emitter emits visible light having a UGR value of 28 or more. The ultraviolet irradiation device according to any one of claims 1 to 5, wherein the first light emitter emits light having a peak wavelength in a wavelength range of 190 nm to 235 nm. The ultraviolet irradiation device according to any one of claims 1 to 6, wherein the light emitting window is provided with an optical filter that blocks the transmission of ultraviolet rays on a wavelength side longer than 235 nm. The ultraviolet irradiation device according to any one of claims 1 to 7, wherein the second light emitting body is arranged in the vicinity of the light emitting window on the outer surface of the housing. The ultraviolet irradiation device according to any one of claims 1 to 8, wherein the second light emitting body is arranged at four corners of the outer periphery of the light emitting window on the outer surface of the housing. The ultraviolet irradiation device according to any one of claims 1 to 8, wherein the second light emitting body is arranged so as to surround the outer periphery of the light emitting window on the outer surface of the housing. The ultraviolet irradiation device according to any one of claims 1 to 7, wherein the second light emitting body is arranged in the vicinity of the first light emitting body inside the housing.

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