JP2023131058A - Uv irradiation device and uv light source module - Google Patents

Abstract

To provide a UV irradiation device with improved versatility, and a UV light source module suitable for the UV irradiation device.SOLUTION: A UV irradiation device 10 includes a light source unit LU1, equipped with a light source 12 having a UV light-emitting diode to output ultraviolet rays to sheets. The light source unit LU1 has flexibility. The UV irradiation device 10 is suspended from a ceiling Ce or the like with the light source unit LU1 curved to project downward. Changing the degree of curvature of the light source unit LU1 can adjust the range of lateral UV emission from the light source 12.SELECTED DRAWING: Figure 1

Description

The present invention relates to an ultraviolet irradiation device and an ultraviolet light source module.

2. Description of the Related Art Ultraviolet irradiation devices are known that inactivate pathogenic and harmful microorganisms such as bacteria, fungi, and viruses by irradiating them with ultraviolet rays. In an ultraviolet irradiation device, an ultraviolet lamp (cold cathode fluorescent tube) is generally used as an ultraviolet light source that outputs ultraviolet light. Further, an ultraviolet irradiation device using an ultraviolet LED (light emitting diode) as an ultraviolet light source is known (for example, see Patent Document 1). The ultraviolet irradiation device described in Patent Document 1 is for water treatment, and has a structure in which an ultraviolet LED is attached to the end of a solid or hollow light guide member such as quartz. It is used by placing it in the target water to be treated. Further, Patent Document 2 describes an air processing device that irradiates ultraviolet rays from an ultraviolet LED to a flap that adjusts the direction of air blown out from an air outlet. Further, Patent Document 3 describes a configuration of an ultraviolet irradiation device in which a light emitting element for irradiating ultraviolet rays into the processing channel is provided at an end of the processing channel through which a liquid to be processed by the air processing device flows.

JP 2021-146233 Publication JP 2021-124279 Publication Japanese Patent Application Publication No. 2021-145976

An ultraviolet irradiation device using an ultraviolet lamp requires a casing for mounting the ultraviolet lamp and an inverter for driving the ultraviolet lamp built into the casing, and cannot be easily installed. Further, the ultraviolet irradiation device using the ultraviolet LED as described above has limited uses and applicable devices, and is not versatile.

An object of the present invention is to provide a highly versatile ultraviolet irradiation device and an ultraviolet light source module suitable for this ultraviolet irradiation device.

The ultraviolet irradiation device of the present invention includes a sheet and a light source section having an ultraviolet light emitting diode provided on the sheet and having an output section for outputting ultraviolet light exposed on one sheet surface side of the sheet.

The ultraviolet ray irradiation device of the present invention includes: a sheet; a light source section having an ultraviolet light emitting diode provided on the sheet and having an output section for outputting ultraviolet light exposed on one sheet surface side of the sheet;
a sensor unit having a human sensor that detects the presence of a person in a space irradiated with ultraviolet light by the ultraviolet light emitting diode; and a control that turns off the ultraviolet light emitting diode when the human sensor detects the presence of a person. It is equipped with a section.

The ultraviolet light source module of the present invention includes a substrate, an ultraviolet light emitting diode provided on the surface of the substrate that outputs ultraviolet light, and a connector connected to the ultraviolet light emitting diode, and a portion corresponding to the ultraviolet light emitting diode. A through hole is provided for outputting ultraviolet light from the ultraviolet light emitting diode to one sheet surface side, and wiring connected to the connector and supplying power to the ultraviolet light emitting diode is formed on one of the sheet surfaces. A light source substrate portion on which the substrate is disposed, and a reflector for converting one or both of the irradiation angle and the irradiation direction of the ultraviolet light from the ultraviolet light emitting diode are provided on the other sheet surface side of the sheet, and a reflector is provided on the other sheet surface side of the sheet. A reflector section is disposed on the side and is fixed to the sheet together with the light source substrate section by sandwiching the sheet between the reflector section and the light source substrate section.

The ultraviolet irradiation device of the present invention includes the ultraviolet light source module and the sheet.

According to the ultraviolet irradiation device of the present invention, since the light source section having the ultraviolet light emitting diode is provided on the sheet, it is thin and lightweight, and can be easily installed regardless of the installation location, making the ultraviolet irradiation device excellent in versatility. It can be made into something.

Further, according to the ultraviolet light source module of the present invention, the ultraviolet light emitting diode and the reflector can be easily assembled on the sheet.

FIG. 2 is an explanatory diagram showing a usage state of the ultraviolet irradiation device according to the first embodiment. It is a perspective view showing an ultraviolet ray irradiation device. FIG. 2 is a partially cutaway perspective view showing the layered structure of the sheet and the state in which ultraviolet LEDs are attached. FIG. 2 is a cross-sectional view showing the structure of a light source unit provided with a reflective layer and a heat dissipation layer. FIG. 3 is a perspective view showing an example in which a reflector is provided in a light source unit. It is a perspective view showing an example of an ultraviolet irradiation device attached to a wall surface. FIG. 2 is a perspective view showing the appearance of an ultraviolet irradiation device according to a second embodiment. FIG. 2 is an exploded perspective view showing the configuration of an ultraviolet light source module. FIG. 3 is a perspective view showing a state in which the wiring on the sheet is connected to the connector. FIG. 3 is a side view showing a state in which the ultraviolet light source module is assembled in a tilted manner with respect to the sheet.

[First embodiment]
In FIG. 1, the ultraviolet irradiation device 10 includes a sheet-shaped light source unit LU1 consisting of a sheet 11, a light source section 12 provided on the sheet 11, a reflective layer RL, etc., and a holding member fixed to both ends of the light source unit LU1. It is composed of 13a, 13b, a sensor section 14, etc., and inactivates microorganisms such as germs, bacteria, mold, and viruses by irradiating ultraviolet light from the light source section 12.

The light source unit LU1 has a rectangular shape and is flexible. The ultraviolet irradiation device 10 is used by suspending the light source unit LU1 from a ceiling Ce or the like, for example, with the light source unit LU1 in a curved state so as to protrude downward as shown. The ultraviolet irradiation device 10 is suspended using, for example, hooks F provided on the holding members 13a and 13b. By increasing or decreasing the interval between the holding members 13a and 13b, that is, the interval between both ends of the light source unit LU1, and changing the degree of curvature, the range of ultraviolet rays irradiated by the light source unit 12 in the lateral direction (in the left-right direction in FIG. 1) can be adjusted. .

The light source section 12 is provided with a first ultraviolet ray irradiation section 15a, a second ultraviolet irradiation section 15b, a third ultraviolet ray irradiation section 15c, and a first display section 17a and a second display section 17b. A third ultraviolet irradiation section 15c is provided at the center of the sheet 11 in the direction A connecting the holding members 13a and 13b along the surface of the light source unit LU1, that is, the sheet surface of the sheet 11. A first ultraviolet irradiation section 15a is arranged at a predetermined interval from 15c to one end side (the holding member 13a side), and a second ultraviolet irradiation section 15b is arranged at a predetermined interval from the other end side (toward the holding member 13b side). has been done. In this example, the distance from the third ultraviolet irradiation section 15c is the same as the distance between the first ultraviolet irradiation section 15a and the second ultraviolet irradiation section 15b. In the A direction, the sheet 11 has a first display section 17a between the first ultraviolet irradiation section 15a and the third ultraviolet irradiation section 15c, and a first display section 17a between the second ultraviolet irradiation section 15b and the third ultraviolet irradiation section 15c. A second display section 17b is disposed at each of the second display sections 17b.

In the following description, unless the first ultraviolet irradiation section 15a, the second ultraviolet irradiation section 15b, and the third ultraviolet irradiation section 15c are particularly distinguished, they will be collectively referred to as the ultraviolet irradiation section 15, and the first display section 17a and the second Unless otherwise distinguished, the display section 17b is collectively referred to as the display section 17. Furthermore, the number of ultraviolet irradiation sections 15 and the number of display sections 17 are not limited.

The ultraviolet irradiation unit 15 irradiates ultraviolet rays, and is composed of an ultraviolet light emitting diode (hereinafter referred to as an ultraviolet LED) 21 provided on the sheet 11 and outputting ultraviolet rays. In each ultraviolet irradiation section 15, a plurality of ultraviolet LEDs 21 are arranged in a line at a predetermined interval in the width direction of the sheet 11 (the depth direction of the paper surface in FIG. 1).

The ultraviolet LED 21 is one that outputs ultraviolet light with a wavelength that inactivates microorganisms such as germs, bacteria, mold, and viruses, for example, ultraviolet light with a wavelength of about 260 nm, from its output portion 21a (see FIG. 3). It is also preferable to use an ultraviolet LED 21 that outputs ultraviolet light with a wavelength of 222 nm, which is considered to have almost no effect on humans.

Each ultraviolet LED 21 irradiates ultraviolet rays with a spread approximately centered on the normal direction of the sheet surface of the sheet 11 at the position where the ultraviolet LED 21 is placed. Therefore, by using the light source unit LU1 in a curved state, the first ultraviolet ray irradiation section 15a in the plane perpendicular to the width direction of the sheet 11 (in the paper plane of FIG. Ultraviolet rays are irradiated from the left side in the figure to the area below. Similarly, the second ultraviolet ray irradiation section 15b irradiates ultraviolet rays from the side toward which the ultraviolet LED 21 faces (rightward in the figure) to a range below it. The third ultraviolet ray irradiation section 15c irradiates ultraviolet rays mainly to the lower range. The irradiation range of ultraviolet rays from the ultraviolet LEDs 21 of the first ultraviolet irradiation section 15a and the second ultraviolet irradiation section 15b changes as the direction of the ultraviolet LEDs 21 is swung up and down depending on the degree of curvature of the light source unit LU1. The irradiation range of ultraviolet rays by the ultraviolet irradiation device 10 is adjusted.

The irradiation range of ultraviolet rays by the ultraviolet irradiation device 10 is a sheet whose boundary is the most protruding part in the direction of curving the light source unit LU1 (the lowest point when curving downward) when the light source unit LU1 is curved. By providing the ultraviolet irradiation section 15 (ultraviolet LED 21) in one or both of the region on one end side and the region on the other end side of the light source unit 11, the degree of curvature of the light source unit LU1 changes. In addition, as in this example, when the light source unit LU1 is curved by bringing one end and the other end of the sheet 11 close to each other, the most protruding part of the light source unit LU1 (sheet 11) is This is a center line that equally divides each area on the end side.

Irradiation of ultraviolet light is controlled depending on the presence or absence of a person in the irradiation space where the light source unit 12 irradiates the ultraviolet light. The presence or absence of a person in the irradiation space is detected by the sensor unit 14. The sensor section 14 includes a human sensor 14a provided on the holding member 13a and a human sensor 14b provided on the holding member 13b. The human sensors 14a and 14b detect, for example, infrared rays from a person and output a signal depending on whether or not a person is present within the detection range. The detection range of the human sensor 14a is adjusted so that, for example, the detection range includes the ultraviolet irradiation range of the first ultraviolet irradiation unit 15a and further detects the area immediately below the ultraviolet irradiation device 10 even when the sheet 11 is curved. There is. Similarly, the detection range of the human sensor 14b is adjusted to include the ultraviolet irradiation range of the second ultraviolet irradiation unit 15b and further detect the area immediately below the ultraviolet irradiation device 10 even when the sheet 11 is curved. ing.

When neither the human sensor 14a nor the human sensor 14b detects a person, the ultraviolet LEDs 21 of the first ultraviolet irradiation section 15a, the second ultraviolet irradiation section 15b, and the third ultraviolet irradiation section 15c are turned on. When the human sensor 14a detects a person, that is, when there is a person within its detection range, the ultraviolet LED 21 of the first ultraviolet irradiation section 15a and the ultraviolet LED 21 of the third ultraviolet irradiation section 15c are turned off. Further, when the human sensor 14b detects a person, the ultraviolet LED 21 of the second ultraviolet irradiation section 15b and the ultraviolet LED 21 of the third ultraviolet irradiation section 15c are turned off. Therefore, when only the human sensor 14a detects a person, only the ultraviolet LED 21 of the second ultraviolet irradiation section 15b lights up, and when only the human sensor 14b detects a person, the first ultraviolet LED 21 lights up. Only the ultraviolet LED 21 of the ultraviolet irradiation section 15a lights up. In this example, the human sensor 14a is the first human sensor, and the human sensor 14b is the second human sensor.

By controlling the lighting and extinguishing of the ultraviolet irradiation section 15 as described above, it is possible to prevent ultraviolet rays from being irradiated to people and to start irradiating ultraviolet rays without wasting any time when no one is present.

Since ultraviolet rays are invisible rays, it is impossible to tell with the naked eye whether the ultraviolet LED 21 is lit or not. For this reason, a display section 17 is provided to display the operating state of the first ultraviolet ray irradiation section 15a, the second ultraviolet ray irradiation section 15b, and the third ultraviolet ray irradiation section 15c, that is, whether or not they are irradiating ultraviolet rays. The display section 17 includes a visible light emitting diode (hereinafter referred to as visible light LED) 22 provided on the sheet 11 and outputting visible light (for example, blue light). In each display section 17, a plurality of visible light LEDs 22 are arranged in a line at predetermined intervals in the width direction of the sheet 11.

The visible light LED 22 of the first display section 17a is turned on and off in synchronization with the ultraviolet LED 21 of the first ultraviolet irradiation section 15a, and the visible light LED 22 of the second display section 17b is turned on and off in synchronization with the ultraviolet LED 21 of the second ultraviolet irradiation section 15b. The lights turn on and off in sync. Therefore, the visible light LED 22 of the first display section 17a is lit when the ultraviolet LED 21 of the first ultraviolet irradiation section 15a is on, and is turned off when the first ultraviolet irradiation section 15a is off. The visible light LED 22 of the second display section 17b is turned on when the ultraviolet LED 21 of the second ultraviolet irradiation section 15b is turned on, and is turned off when the second ultraviolet irradiation section 15b is turned off. This informs which ultraviolet irradiation unit 15 is turned on or off. Note that the display section 17 may be provided corresponding to each of the plurality of ultraviolet irradiation sections 15.

In this example, the ultraviolet LED 21 of the first ultraviolet irradiation section 15a is the first ultraviolet LED, the ultraviolet LED 21 of the second ultraviolet irradiation section 15b is the second ultraviolet LED, and the ultraviolet LED 21 of the third ultraviolet irradiation section 15c is the third ultraviolet LED. . Further, the visible light LED 22 of the first display section 17a is a first visible light LED, and the visible light LED 22 of the second display section 17b is a second visible light LED.

As shown in FIG. 2, the light source unit LU1 has a rectangular shape in this example, and the holding members 13a and 13b are attached to both ends of the light source unit LU1 in the A direction as described above. The shape, size, etc. of the light source unit LU1 can be determined as appropriate depending on the installation location, installation mode, etc. of the ultraviolet irradiation device 10.

In the light source unit LU1, the light source section 12, the reflective layer RL, etc. are provided on the sheet 11 as described above. The reflective layer RL is provided on one sheet surface of the sheet 11 and reflects ultraviolet rays from the ultraviolet LEDs 21. With this reflective layer RL, the space to be irradiated with ultraviolet rays is irradiated without waste. In this example, the reflective layer RL is provided on the sheet surface 11a (see FIG. 3) of the sheet 11 on the side from which ultraviolet rays are output. Thereby, deterioration of the sheet 11 due to ultraviolet rays from the ultraviolet LEDs 21 is suppressed. In this example, the reflective layer RL also functions as a heat dissipation layer in order to efficiently dissipate heat from the ultraviolet LED 21 and the visible light LED 22.

In the light source unit LU1, an opening 33 is formed at each of the ultraviolet LEDs 21 of the ultraviolet irradiation section 15 and each of the visible light LEDs 22 of the display section 17, and these ultraviolet LEDs 21 and visible light LEDs 22 are exposed. As a result, ultraviolet rays are irradiated from the ultraviolet LED 21 to the sheet 11 surface side through the opening 33, and lighting of the visible light LED 22 is displayed.

As described above, each ultraviolet irradiation section 15 has a plurality (three in this example) of ultraviolet LEDs 21 arranged in a line in the width direction of the sheet 11 (direction B in the figure), and each display section 17 has a plurality (three in this example) of ultraviolet LEDs 21 arranged in a line in the width direction of the sheet 11 (direction B in the figure). In the example, three (3) visible light LEDs 22 are arranged in a line. The number of ultraviolet LEDs 21 in the ultraviolet irradiation section 15 and the number of visible light LEDs 22 in the display section 17 are not limited to three, but may be one or more. Further, the number of ultraviolet LEDs 21 in the ultraviolet irradiation section 15 and the number of visible light LEDs 22 in the display section 17 may be different. Furthermore, although the arrangement of the ultraviolet LEDs 21 in the ultraviolet irradiation section 15 and the arrangement of the visible light LEDs 22 in the display section 17 are arranged in a line in this example, these arrangements are not limited to this.

The sheet 11 also includes a wiring section 26 that includes a plurality of wirings for supplying power to each of the ultraviolet LEDs 21 and visible light LEDs 22, wiring for connecting the control circuit 27 and the human sensors 14a, 14b, etc. For example, a control circuit 27 made up of a transistor made of an organic semiconductor or the like is provided. The control circuit 27 as a control unit controls the lighting and extinguishing of the ultraviolet LED 21 of each ultraviolet irradiation unit 15 as described above based on the detection results of the human sensors 14a and 14b, and also controls the visible light of each display unit 17. Controls lighting and extinction of the LED 22. Note that the control circuit 27 may be configured by mounting an integrated circuit or discrete components on a board. In this case, the substrate may be housed in the holding member 13a, for example. In this example, power is supplied to the ultraviolet irradiation device 10 from a plug 28 inserted into the holding member 13a.

The holding members 13a and 13b have a hollow box shape made of, for example, synthetic resin, but the shape and the like are not limited. Two hooks F are provided on each of the holding members 13a and 13b. Note that a ring-shaped member may be used instead of the hook F. A human sensor 14a is arranged at one end in the width direction of the holding member 13a, and a human sensor 14b is arranged at the end of the holding member 13b on the opposite side to the holding member 13a. Note that the positions of the human sensor 14a and the human sensor 14b are not limited to this, and may be provided, for example, at the center of the holding members 13a and 13b, respectively.

In FIG. 3, a wiring section 26, an insulating layer 31, and a reflective layer RL are provided on the sheet surface 11a of the sheet 11 of the light source unit LU1. The sheet 11 is made of synthetic resin, such as PET (polyethylene terephthalate), and has flexibility and insulation. The material of the sheet 11 is not limited. Various wirings of the wiring section 26 and a control circuit 27 are formed on the sheet surface 11a of the sheet 11. In FIG. 3, a pair of wiring lines 26a and 26b for supplying power to the ultraviolet LED 21 is shown. The wiring portion 26 may be formed by vapor deposition or may be formed by pasting a thin film conductive wire, without any limitations on the method of forming the wiring portion 26, as long as it does not inhibit the flexibility of the light source unit LU1.

An insulating layer 31 is formed to cover the wiring section 26 and the control circuit 27, and a reflective layer RL is formed on the upper surface of the insulating layer 31 (the surface opposite to the sheet 11). The insulating layer 31 is made of an insulating material. The reflective layer RL is made of a metal material that reflects ultraviolet rays. Similar to the wiring section 26, the insulating layer 31 and the reflective layer RL may be formed by any method without limitation as long as they do not impede the flexibility of the light source unit LU1, such as vapor deposition, an insulating film, or a metal thin film. It may also be formed by pasting.

By using a material with higher thermal conductivity than the sheet 11 as the material of the reflective layer RL, the reflective layer RL is made to function as a heat dissipation layer. In this example, the reflective layer RL is made of Al (aluminum). The heat of the ultraviolet LED 21 is transmitted to the reflective layer RL via the wirings 26a, 26b and the insulating layer 31, and is radiated from the reflective layer RL. The same applies to the heat of the visible light LED 22. By dissipating the heat from the ultraviolet LED 21 and the visible light LED 22 in this way, the sheet 11 is prevented from melting.

Note that the reflective layer RL can be provided on the other sheet surface 11b, but as described above, by providing the reflective layer RL on the sheet surface 11a side, that is, on the side of the sheet 11 from which ultraviolet rays are output, deterioration of the sheet 11 due to ultraviolet rays can be prevented. It is more preferable because it can suppress.

An opening 33 serving as an end of a hole penetrating the insulating layer 31 and the reflective layer RL is exposed on the surface of the light source unit LU1 at a position corresponding to the ultraviolet LED 21. In this example, the ultraviolet LED 21 is fixed to the wirings 26a and 26b through the opening 33, for example, by soldering. For this reason, the opening 33 is formed in a size that exposes the ultraviolet LED 21 and its surroundings. The ultraviolet LED 21 is attached with the output part 21a that outputs ultraviolet rays facing outward from the opening 33. Thereby, the ultraviolet LED 21 is provided on the sheet 11 with its output portion 21a exposed to the sheet surface 11a side, and outputs ultraviolet rays to the sheet surface 11a side. The same applies to the visible light LED 22, which is provided on the sheet 11 with its output portion exposed on the sheet surface 11a side.

When using the ultraviolet irradiation device 10, the light source unit LU1 is shaped into a curved shape as described above and is hung from the ceiling of a space such as a room where ultraviolet rays are to be irradiated. Since the ultraviolet irradiation device 10 configured as described above is lightweight, it can be used by being hung on, for example, a ceiling-embedded air conditioner. Further, the ultraviolet irradiation device 10 can be hung by pinning a hook to the ceiling. Furthermore, by increasing or decreasing the degree of curvature of the light source unit LU1, the irradiation range of ultraviolet rays is changed depending on the size of the space to be irradiated. In this way, the ultraviolet irradiation device 10 can be easily installed without attaching special wiring or equipment to the ceiling, and the irradiation range of ultraviolet rays can be adjusted.

When the ultraviolet irradiation device 10 is activated, the ultraviolet LED 21 of each ultraviolet irradiation unit 15 is turned on and ultraviolet rays are irradiated even when the human sensors 14a and 14b do not detect a person. As a result, microorganisms and viruses in the ultraviolet irradiation space are inactivated. At this time, each visible light LED 22 of the first display section 17a and the second display section 17b lights up.

When a person enters the ultraviolet irradiation space, the person is detected by either the human sensor 14a or 14b. For example, when a person enters the space irradiated with ultraviolet rays from the first ultraviolet ray irradiator 15a, the person is detected by the human sensor 14a. Based on the detection result of the human sensor 14a, the control circuit 27 turns off each ultraviolet LED 21 of the first ultraviolet irradiation section 15a and the third ultraviolet irradiation section 15c. As a result, only each ultraviolet LED 21 of the second ultraviolet irradiation section 15b is lit. At the same time, the control circuit 27 turns off each visible light LED 22 of the first display section 17a, and turns on only each visible light LED 22 of the second display section 17b.

On the other hand, when a person enters the space irradiated with ultraviolet rays from the second ultraviolet irradiator 15b, the person is detected by the human sensor 14b. In this case, based on the detection result of the human sensor 14a, the control circuit 27 turns off each of the ultraviolet LEDs 21 of the second ultraviolet irradiation section 15b and the third ultraviolet irradiation section 15c, and each of the ultraviolet rays of the first ultraviolet irradiation section 15a. Only the ultraviolet LED 21 is lit. Further, each visible light LED 22 of the second display section 17b is turned off, and only each visible light LED 22 of the first display section 17a is turned on.

When a person enters the space irradiated with ultraviolet rays from the third ultraviolet irradiator 15c, the person is detected by at least one of the human sensors 14a and 14b. Therefore, in that case, lighting and extinguishing of the ultraviolet LED 21 of each ultraviolet irradiation section 15 and the visible light LED 22 of the display section 17 are controlled in the same manner as described above.

By controlling the lighting and extinguishing of the ultraviolet LED 21 of the ultraviolet irradiation section 15 as described above, the ultraviolet rays from the ultraviolet LED 21 are prevented from being irradiated and affecting people. Furthermore, it can be confirmed whether or not ultraviolet rays are being irradiated by turning on and off the visible light LED 22.

The detection range of the human sensors 14a and 14b is such that the presence or absence of a person is detected from a space outside the effective irradiation space (range) of ultraviolet rays of the first ultraviolet ray irradiation section 15a and the second ultraviolet ray irradiation section 15b. It is preferable to In this way, the ultraviolet LED 21 of the ultraviolet irradiation unit 15 can be turned off before entering the effective ultraviolet irradiation space.

FIG. 4 shows an example in which a heat dissipation layer HL is layered together with a reflective layer RL on the sheet surface 11a side. In this example, a heat dissipation layer HL and a reflective layer RL are layered on the insulating layer 31 of the sheet 11 in order from the insulating layer 31 side. The heat dissipation layer HL is formed of, for example, Cu (copper), which has better thermal conductivity than the reflective layer RL. By providing the heat dissipation layer HL in addition to the reflective layer RL in this manner, the heat from the ultraviolet LED 21 and the visible light LED 22 can be dissipated more effectively. Note that a heat dissipation layer may be provided on the sheet surface 11b of the sheet 11 on the side opposite to the side from which ultraviolet rays are output. Further, as in the example of FIG. 4, the heat dissipation layer HL may be provided on the sheet surface 11a side, and the heat dissipation layer may be provided on the seat surface 11b.

FIG. 5 shows an example in which a reflector 38 is provided for the ultraviolet LED 21. The reflector 38 in this example has a cylindrical shape in the form of a truncated pyramid, and its inner surface is a reflective surface that reflects ultraviolet rays. This reflector 38 is attached to the surface of the light source unit LU1 by adhesive or the like so that the ultraviolet LED 21 is located within the opening having a relatively small inner diameter. By attaching the reflector 38 in this manner, the irradiation angle of the ultraviolet rays output from the ultraviolet LED 21 is reduced, and the irradiation range is narrowed. This increases the intensity of ultraviolet rays irradiated to a specific location and shortens the time required to inactivate microorganisms and viruses. Note that the irradiation direction of the ultraviolet rays can also be adjusted by changing the shape of the reflector 38 or attaching it at an angle with respect to the sheet 11.

In the above, a case has been described in which the light source unit LU1 is curved and the ultraviolet irradiation device 10 is suspended from the ceiling Ce, etc., but the light source unit LU1 can also be made flat and attached to the ceiling Ce, a wall, etc. for use. Further, the light source unit LU1 can also be arranged in a curved or bent manner.

FIG. 6 shows an example of an ultraviolet irradiation device 40 installed on a wall of a room, a partition, or the like. The ultraviolet irradiation device 40 includes a light source unit LU2, a holding section 43 fixed to one end of the light source unit LU2, and a human sensor 44 provided on the holding section 43. The light source unit LU2 includes an ultraviolet irradiation section 45 made up of a plurality of ultraviolet LEDs 21 and a display section 47 made up of a plurality of visible light LEDs 22. These structures are the same as those of the ultraviolet irradiation section 15 and the display section 17 of the light source unit LU1. The human sensor 44 detects the presence or absence of a person in a detection range that includes the space (range) where the ultraviolet rays are irradiated by the ultraviolet irradiator 45 . When the human sensor 44 detects a person, each ultraviolet LED 21 of the ultraviolet irradiation section 45 is turned off, and the control circuit is controlled so that the visible light LED 22 of the display section 47 is turned off.

The ultraviolet irradiation device 40 is used by hanging the ring member 43a provided on the holding portion 43 on a pin P or the like fixed to the wall surface 49. As a result, ultraviolet rays are irradiated onto the space toward which the wall surface 49 faces, as well as the floor, table surface, etc. below the space.

[Second embodiment]
The ultraviolet irradiation device of the second embodiment uses an ultraviolet light source module. Note that substantially the same members as those in the first embodiment are given the same reference numerals, and their explanations will be omitted.

In FIG. 7, the ultraviolet irradiation device 50 includes a light source unit LU3, holding members 13a and 13b, and a plurality of human sensors 52. This ultraviolet irradiation device 50 is suspended from a ceiling or the like using ring members 53 provided on the holding members 13a and 13b, and the light source unit LU3 is hung in the same way as the ultraviolet ray irradiation device 10 of the first embodiment (see FIG. 1). It is used when it is curved so that it protrudes downward. In addition, in FIG. 7, the vertical direction is reversed for convenience of explanation. Further, in the following description, for convenience, explanations and illustrations will be made based on the vertical direction shown in FIG. 7, but the vertical direction does not mean the direction in which the ultraviolet irradiation device 50 is actually used.

The light source unit LU3 is flexible and includes a plurality of ultraviolet light source modules (hereinafter simply light source modules) on a sheet 55 (see FIG. 8) provided with a wiring section, a control circuit, and an insulating layer (all not shown). ) 57 is assembled. Although the sheet 55 is transparent in this example, it may be opaque. Further, it is preferable that the sheet 55 is provided with a reflective layer and a heat dissipation layer.

As shown in FIG. 8, the light source module 57 includes a light source substrate section 61, spacers 62 and 63, and a reflector section 66 consisting of a disk member 64 and a main body member 65. The spacer 63 and the reflector section 66 are arranged on the sheet surface 55a side of the sheet 55, that is, the side that irradiates ultraviolet rays, and the light source substrate section 61 and the spacer 62 are arranged on the sheet surface 55b side, which is opposite to the sheet surface 55a. be done.

In this example, the light source board section 61 includes a disc-shaped board main body 61a, an ultraviolet LED 21 fixed to the upper surface of the board main body 61a, a connector 68, and a thin film wiring 69 connecting the ultraviolet LED 21 and the connector 68. have The ultraviolet LED 21 is arranged at the center of the board main body 61a, and the connector 68 is arranged at the periphery of the board main body 61a. This connector 68 is used to connect the wiring section provided on the sheet 55 and the ultraviolet LED 21. On the periphery of the light source board portion 61, six screw through holes 61b for passing the fixing screws 71 are provided at a pitch of 60° in the circumferential direction.

The substrate main body 61a is made of a material with higher thermal conductivity than the sheet 55, for example, metal, and also functions as a heat radiating member that radiates heat from the ultraviolet LEDs 21. Note that the ultraviolet LED 21 and the wiring 69 are electrically insulated from the substrate main body 61a by interposing an insulating film (not shown).

The spacer 62 is a plate-like member having a circular plate having approximately the same diameter as the light source substrate portion 61 and provided with a through hole 62a and a plurality of notches 62b. A through hole 62a is provided in the center of the spacer 62 to expose the ultraviolet LED 21 and allow ultraviolet light to pass therethrough. Further, the spacer 62 is provided with six rectangular notches 62b at a pitch of 60° in the circumferential direction. Thereby, a fan-shaped protrusion 62c is formed between the notches 62b of the spacer 62, and six protrusions 62c are formed. The cutout 62b is used as a space in which the connector 68 is placed. Each protrusion 62c is provided with a screw through hole 62d for passing the fixing screw 71 therethrough. The screw through holes 62d are provided at a pitch of 60° in the circumferential direction of the spacer 62. This spacer 62 has a sloped upper surface, and the thickness gradually increases linearly in one direction.

The spacer 63 has the same shape as the spacer 62 when viewed from above. Therefore, the spacer 63 includes a through hole 63a for exposing the ultraviolet LED 21 and transmitting ultraviolet light, six notches 63b arranged at a pitch of 60 degrees in the circumferential direction, six fan-shaped protrusions 63c, and a fixing screw 71. A screw through hole 63d for passing the screw through is provided respectively. The lower surface of the spacer 63 is sloped, and the thickness gradually decreases linearly in one direction, that is, the thickness gradually increases linearly in the opposite direction to the spacer 62. The inclination of the upper surface of the spacer 62 and the inclination of the lower surface of the spacer 63 are made the same.

The spacers 62 and 63 are used to adjust the inclination of the light source substrate section 61, that is, the ultraviolet ray LED 21, and the reflector section 66 with respect to the sheet 55, and to change the irradiation direction of ultraviolet rays when the sheet 55 is held between them. The spacer 63 is arranged with the sheet 55 sandwiched between the spacer 63 and the spacer 62 so that the direction in which the thickness gradually decreases (changes) is opposite to that of the spacer 62. In FIG. 8, the spacer 62 has a thickness gradually increasing in the direction of the arrow C, and the spacer 63 has a thickness gradually increasing in the direction opposite to the arrow C.

Since the spacers 62 and 63 have the notches 62b and 63b and the screw through holes 62d and 63d as described above, they have a 6-fold symmetrical shape, which is 60°, 120°, 180°, and 240°. , 300°, and 360° rotational positions have rotational symmetry. As a result, the spacers 62 and 63 can be arranged in six rotationally symmetrical positions, and the directions of the slopes can be changed in six ways. Thereby, the inclinations of the light source substrate section 61 and the reflector section 66 with respect to the sheet 55 can be adjusted in any one of six ways. Note that in this example, the spacer 63 is the first spacer, and the spacer 62 is the second spacer.

The disk member 64 of the reflector section 66 has a disk shape with approximately the same diameter as the light source substrate section 61, and is provided with a through hole 64a in the center thereof to expose the ultraviolet LED 21 and allow ultraviolet light to pass therethrough. Further, the disc member 64 is provided with screw holes 64b that are screwed into the fixing screws 71 at a pitch of 60° in the circumferential direction. Furthermore, a cylindrical rib 64c along the circumferential direction is provided on the outer peripheral edge of the disc member 64 than the screw hole 64b.

The main body member 65 includes a cylindrical ring 65a, a cover 65b that covers the upper end surface of the ring 65a, and a reflector 65c provided approximately at the center of the cover 65b. By fitting the rib 64c of the disc member 64 inside the ring 65a, it is made rotatable relative to the disc member 64. The reflector 65c changes the irradiation angle and irradiation direction of the ultraviolet rays from the ultraviolet LED 21. The direction in which the reflector 65c irradiates the ultraviolet rays can be adjusted by rotating the main body member 65. Note that the shape of the reflector 65c can be determined depending on the irradiation angle of the ultraviolet rays, the size of the change in the irradiation direction, and the like. Note that only the irradiation angle may be changed by the reflector 65c. In this case, the main body member 65 does not need to be rotatable.

A through hole 74 is provided in the sheet 55 at the mounting position of the light source module 57 to expose the ultraviolet LED 21 and allow ultraviolet light to pass therethrough. In addition, a notch 75 in which the connector 68 of the light source board section 61 is disposed is formed in the sheet 55 and connected to the through hole 74, and a band-shaped flap 76 that is a part of the sheet 55 is provided in the notch 75. It stands out. A pair of wiring lines 77 are formed on the surface of the flap 76 for supplying power to the ultraviolet LED 21 in the wiring section. Around the through hole 74 of the sheet 55, through holes 78 for passing the fixing screws 71 are provided at a pitch of 60° in the circumferential direction.

The light source module 57 configured as described above is arranged in order from the bottom so that the through holes 62a, 74, 63a, and 64a overlap and the ultraviolet LEDs 21 are exposed in these through holes 62a, 74, 63a, and 64a. The light source substrate section 61, spacer 62, sheet 55, spacer 63, disk member 64, and main body member 65 are stacked on top of each other. At this time, as shown in FIG. 9, the flap 76 is inserted into the connector 68, and the wiring 77 is connected to the connector. In this state, the fixing screws 71 are passed through the corresponding screw through holes of each member, and the fixing screws 71 are screwed into the screw holes 64b of the disc member 64. Further, the main body member 65 is attached to the disc member 64.

By assembling the light source module 57 to the sheet 55 in this manner, the sheet 55 is sandwiched between the light source board section 61 and the reflector section 66 via the spacers 62 and 63, and the light source module 57 is fixed to the sheet. . As shown in FIG. 10, the spacers 62 and 63 are oriented such that their thicknesses gradually increase in opposite directions, so that the light source substrate section 61 and the reflector section 66 are arranged on the slopes of the spacers 62 and 63 relative to the sheet 55. The light source module 57 is fixed to the sheet 11 while being tilted by the same angle θ.

As described above, since the spacers 62 and 63 can be arranged at six rotationally symmetrical positions, the direction of inclination of the light source substrate section 61 and the reflector section 66 can be adjusted in 60° increments with respect to the sheet 55 when assembled. can. By adjusting this inclination and rotating the reflector section 66 with respect to the main body member 65, the direction and range of irradiation of the ultraviolet rays can be adjusted. Thereby, in combination with the adjustment of the irradiation range by the curvature of the light source unit LU3, the irradiation range of ultraviolet rays can be adjusted more appropriately.

Note that although the direction of inclination of the light source substrate section 61 and the reflector section 66 is adjustable in units of 60 degrees, the present invention is not limited thereto, and may be adjustable in units of 45 degrees, 90 degrees, etc., for example. In this example, the inclinations of the light source substrate section 61 and the reflector section 66 are adjusted, but if the inclinations are not adjusted, spacers with uniform thickness may be used instead of the spacers 62 and 63. Alternatively, the sheet 55 may be sandwiched between the light source substrate section 61 and the reflector section 66 without intervening the spacers 62 and 63. Further, the main body member 65 of the reflector section 66 may be omitted.

10, 40, 50 ultraviolet irradiation device 11, 55 sheet 12 light source section 14 sensor section 14a, 14b, 44, 52 human sensor 15a first ultraviolet irradiation section 15b second ultraviolet irradiation section 15c third ultraviolet irradiation section 17a first display Section 17b Second display section 21 Ultraviolet LED
22 Visible light LED
26 Wiring section 27 Control circuit 38, 65c Reflector 45 Ultraviolet irradiation section 47 Display section 57 Light source module 61 Light source board section 62, 63 Spacer 66 Reflector section HL Heat dissipation layer LU1, LU2, LU3 Light source unit RL Reflective layer

Claims (17)

sheet and
An ultraviolet irradiation device comprising: a light source section provided on the sheet and having an output section for outputting ultraviolet light having an ultraviolet light emitting diode exposed on one sheet surface side of the sheet. The ultraviolet irradiation device according to claim 1, further comprising a heat dissipation layer provided on the sheet and having higher thermal conductivity than the sheet. 3. The ultraviolet irradiation device according to claim 1, further comprising a visible light emitting diode provided on the sheet, which turns on and off in synchronization with the ultraviolet light emitting diode, and outputs visible light when turned on. sheet and
a light source section having an ultraviolet light emitting diode provided on the sheet and having an output section for outputting ultraviolet light exposed on one sheet surface side of the sheet;
a sensor unit having a human sensor that detects the presence of a person in a space irradiated with ultraviolet light from the ultraviolet light emitting diode;
An ultraviolet irradiation device comprising: a control unit that turns off the ultraviolet light emitting diode when the human sensor detects the presence of a person. a visible light emitting diode that is provided on the sheet in correspondence with the ultraviolet light emitting diode and outputs visible light;
The ultraviolet irradiation device according to claim 4, wherein the control unit turns on and off the visible light emitting diode in synchronization with the ultraviolet light emitting diode. A first ultraviolet light emitting diode and a second ultraviolet light emitting diode are provided whose output parts are exposed at mutually different parts of one sheet surface of the sheet as the ultraviolet light emitting diode,
A first human sensor that detects the presence of a person in a first irradiation space of the first ultraviolet light emitting diode as the human sensor, and a second human sensor that detects the presence of a person in the second irradiation space of the second ultraviolet light emitting diode. A human sensor is installed,
The control unit turns off the first ultraviolet light emitting diode when the first human sensor detects the presence of a person, and turns off the first ultraviolet light emitting diode when the second human sensor detects the presence of a person. The ultraviolet irradiation device according to claim 4 or 5, characterized in that the second ultraviolet light emitting diode is turned off. A third ultraviolet light emitting diode as the ultraviolet light emitting diode is provided on the sheet between the first ultraviolet light emitting diode and the second ultraviolet light emitting diode,
The control unit turns off the third ultraviolet light emitting diode together with the first ultraviolet light emitting diode when the first human sensor detects the presence of a person, and the second human sensor detects the presence of a person. The ultraviolet irradiation device according to claim 6, wherein when the ultraviolet light emitting diode is detected, the third ultraviolet light emitting diode is turned off together with the second ultraviolet light emitting diode. The light source section is
a first visible light emitting diode that is provided on the sheet in correspondence with the first ultraviolet light emitting diode and outputs visible light;
a second visible light emitting diode that is provided on the sheet in correspondence with the second ultraviolet light emitting diode and outputs visible light;
The control unit turns on and off the first visible light emitting diode in synchronization with the first ultraviolet light emitting diode, and turns on and off the second visible light emitting diode in synchronization with the second ultraviolet light emitting diode. The ultraviolet irradiation device according to claim 6 or 7, characterized in that: The ultraviolet irradiation device according to any one of claims 1 to 8, further comprising wiring provided on the sheet and supplying power to the light source section. The ultraviolet irradiation device according to any one of claims 1 to 9, further comprising a reflector attached to the sheet and converting one or both of an irradiation angle and an irradiation direction of the ultraviolet light from the ultraviolet light emitting diode. . It has a substrate, an ultraviolet light emitting diode provided on the surface of the substrate that outputs ultraviolet light, and a connector connected to the ultraviolet light emitting diode. A through hole for output is provided on one sheet surface side, and wiring connected to the connector to supply power to the ultraviolet light emitting diode is formed on one sheet surface on the other sheet surface side. a light source substrate section on which the substrate is arranged;
A reflector that converts one or both of the irradiation angle and the irradiation direction of the ultraviolet light from the ultraviolet light emitting diode is provided, and is arranged on the one sheet surface side and the sheet is held between the light source substrate part. An ultraviolet light source module comprising: a reflector portion fixed to the sheet together with the light source substrate portion. The ultraviolet light source module according to claim 11, wherein the reflector is rotatable with respect to the substrate. A through hole is formed through which the ultraviolet light emitted from the ultraviolet light emitting diode passes, the thickness gradually increases linearly in one direction, and the reflector part is disposed between the reflector part and the sheet and can be arranged at a plurality of rotationally symmetrical positions. a first spacer;
A through-hole is formed through which ultraviolet light from the ultraviolet light emitting diode passes, and the thickness gradually increases linearly in one direction. The ultraviolet light source module according to claim 11 or 12, comprising: a first spacer and a second spacer arranged so that the direction of gradual increase in thickness is opposite to the first spacer. The ultraviolet light source module according to any one of claims 11 to 13,
An ultraviolet irradiation device comprising the above sheet. 15. The ultraviolet irradiation device according to claim 4, further comprising a heat dissipation layer provided on the sheet and having higher thermal conductivity than the sheet. The ultraviolet irradiation device according to any one of claims 4 to 10, 14, and 15, further comprising a reflective layer provided on the sheet and reflecting ultraviolet light from the ultraviolet light emitting diode. The ultraviolet irradiation device according to any one of claims 1 to 10 and 14 to 16, wherein the sheet has flexibility.

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