JP2016167589A - Ultraviolet radiation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ultralight radiation device which is used as an alternative to a black light.SOLUTION: An ultralight radiation device 1 includes: a housing 6 comprising a translucent cover 9 having a C shaped cross section surface and a bow shaped base member 7 which closes an opening of the translucent cover 9 and having a cylindrical outer shape; an LED module 5 formed by mounting LEDs 3 for emitting ultralight light on a mounting substrate 15 and housed in the housing 6; mouth piece members 13 attached to end parts of the housing 6; and a lighting circuit 11 for receiving electric power from the mouth piece members 13 and causing the LED module 5 to turn on.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an ultraviolet irradiation device using an LED for irradiating ultraviolet rays as a light source.

Conventionally, there is a black light fluorescent lamp that emits near-ultraviolet light having a strong fluorescent action for decoration, appraisal of banknotes and antiques, curing of resin and ink, and the like (for example, Patent Document 1).
On the other hand, in recent years, lighting devices using LEDs with excellent power savings as light sources have become widespread due to increasing environmental awareness, and linear light sources using LEDs as an alternative to conventional ultraviolet lamps (for example, Patent Document 2). ) And an ultraviolet irradiation device having a function close to that of a black light fluorescent lamp and using an LED has been proposed (for example, Patent Document 3).

Japanese Patent Laid-Open No. 11-283570 Japanese Patent Laying-Open No. 2014-194913, Paragraph 32 JP 2013-114875 A

In Patent Document 2 and Patent Document 3, the use of an LED as an ultraviolet irradiation device is proposed, but an LED that can be used as an alternative to a conventional black light is not specifically proposed.
The problem to be solved by the present invention is to provide an ultraviolet irradiation device that can be used as an alternative to black light in view of the above-mentioned problems.

  The present invention includes a translucent cover having a “C” cross section and an arcuate base member that closes an opening of the translucent cover, and a casing having an outer appearance that is cylindrical. An LED module mounted on a mounting board and housed in the housing, a base member attached to an end of the housing, and receiving power from the base member to light the LED module And a lighting circuit.

  According to the present invention, it can be used as an alternative to black light.

It is an external appearance perspective view of the ultraviolet irradiation device of an embodiment. It is a disassembled perspective view of the ultraviolet irradiation device of an embodiment. It is a longitudinal cross-sectional view of the edge part of the ultraviolet irradiation device of embodiment. It is a cross-sectional view of the edge part of the ultraviolet irradiation device of an embodiment. It is a cross-sectional view of the edge part of the ultraviolet irradiation device of a modification. It is a cross-sectional view of the edge part of the ultraviolet irradiation device of a modification.

<Overview>
In the ultraviolet irradiation apparatus according to an aspect of the present invention, the ultraviolet light irradiation apparatus includes a translucent cover having a “C” cross section and an arcuate base member that closes an opening of the translucent cover, and has an outer appearance of a cylindrical shape. An LED module in which a plurality of LEDs emitting ultraviolet rays are mounted on a mounting substrate and housed in the housing, a base member mounted on an end of the housing, and the base member And a lighting circuit for lighting the LED module.
In the ultraviolet irradiation apparatus according to another aspect, the mounting substrate has a long strip shape in the longitudinal direction of the housing, and the LEDs are mounted with an interval of 50 mm to 150 mm in the longitudinal direction of the mounting substrate.
In the ultraviolet irradiation device according to another aspect, the lighting circuit supplies a current of 200 mA to 400 mA to the LED.

<Embodiment>
Embodiments will be described below in detail with reference to the drawings.
1. Overall Configuration The ultraviolet irradiation device 1 includes an LED module 5 that includes an LED 3 that irradiates ultraviolet rays, a base member 7 for mounting the LED module 5, a cover member 9 that covers the LED module 5, and lighting for causing the LED 3 to emit light. A circuit 11 and a base member 13 for receiving commercial power from the socket are provided.
Specifically, the ultraviolet irradiation device 1 has a straight tube shape. The ultraviolet irradiation device 1 includes a cover member 9 having a “C” shape in cross section and an arcuate base member 7 that closes an opening of “C” of the cover member 9, and has an external appearance in a cylindrical shape. A housing 6, a plurality of LEDs 3 mounted on a mounting substrate 15, an LED module 5 housed in the housing 6, a base member 13 attached to an end of the housing 6, and a base member 13 A lighting circuit 11 for receiving power and lighting the LED module 5 is provided.

2. Configuration of each part (1) LED module 5
As shown in FIG. 2, the LED module 5 includes a long mounting board 15 and a plurality of LEDs 3 mounted at intervals along the longitudinal direction of the mounting board 15. The mounting board 15 has a wiring pattern (not shown) including a mounting pattern for mounting the plurality of LEDs 3 in a predetermined connection form and a terminal pattern for connecting the mounting pattern and the lighting circuit 11. Yes.
In the mounting substrate 15, the side on which the LED 3 is mounted is referred to as the front side, and the side on which the LED 3 is not mounted is referred to as the back side. The wiring pattern is present on the surface of the mounting substrate 15.
Since the cover member 9 described later has the diffusion groove 35, the ultraviolet light emitted from the LED 3 (having a wavelength in the range of 365 [nm] to 405 [nm]) is easily diffused uniformly, and the mounting substrate 15 can increase the pitch of the LEDs 3 mounted. Specifically, the pitch of the LEDs 3 can be expanded to 50 [mm] to 120 [mm]. In this case, although there is a graininess of the LED 3 that is lit, the half-value angle of the LED 3 is about 120 [degree], and the irradiated surface in normal use is 100 [mm] or more away from the LED 3 for practical use. Can be used without any problem. In addition, the display of AB which prescribes | regulates the range refers to the range below A and below B.

(2) Base member 7
This will be described mainly with reference to FIGS.
The base member 7 has a long shape. The base member 7 is combined with the cover member 9 to form a cylinder that functions as a casing. The cross-sectional shape of the base member 7 is constant with respect to the longitudinal direction. The base member 7 has a cross-sectional shape similar to an arc shape.
As shown in FIG. 4, the base member 7 includes a base body 17 having a shape similar to a bow, a module mounting means 19 for mounting the LED module 5, and a cover mounting means 21 for mounting the cover member 9. And have.
The base body 17 has a screw hole 23 for mounting the cap member 13 at the end. The screw hole 23 extends parallel to the longitudinal direction of the base body 17.

The module mounting means 19 is provided on the side opposite to the arc surface of the base body 17. The module mounting means 19 is configured by a locking structure that locks the short-side end of the mounting substrate 15 of the LED module 5.
The locking structure for the module includes a standing portion 25 that stands from both ends of the mounting board 15 of the LED module 5 in the short direction in a state where the LED module 5 is placed at a predetermined position of the base body 17, An overhanging portion 27 that projects from the portion 25 to the surface of the mounting substrate 15 is provided. The LED module 5 is mounted on the base member 7 by being inserted from the end surface of the base member 7 into a space formed between the base body 17 and the overhanging portion 27.

  The cover mounting means 21 is provided on the side opposite to the arc surface of the base body 17. The cover mounting means 21 is configured by a locking structure that locks a bent portion (opening side end) 29 of the cover member 9.

  The cover locking structure uses a module locking structure. The cover locking structure includes a bent portion 31 that bends from the standing tip of the standing portion 25 to the side opposite to the side where the LED module 5 exists. The bent tip of the bent portion 31 has a circular shape in the cross section. A bent portion 29 which is an open end portion of the cover member 9 is engaged with a space between the bent portion 31 and the base body 17. The cover member 9 is attached to the base member 7 by being inserted between the base body 17 and the bent portion 31 from the end surface of the base member 7 in the longitudinal direction.

In the base body 17, an angle connecting the peripheral end of the base body 17 and the center of the cylinder in the cylinder combined with the cover member 9 is in the range of 70 [degrees] to 120 [degrees], preferably 80 [degrees] to 110. It is comprised so that it may be in the range of [degree]. Thereby, the distance of LED3 and the cover member 9 can be enlarged. In addition, deterioration by the ultraviolet-ray of the cover member 9 is suppressed by enlarging the space | interval of LED3 and the cover member 9. FIG.
In the cross section of the ultraviolet irradiation device 1, a virtual line connecting the standing tip of one standing portion 25 and the center of the surface of the LED 3 of the LED module 5, the standing tip of the other standing portion 25, and the LED 3 of the LED module 5. The angle between the imaginary line and the center of the surface of the LED 3 (which is the angle including the main emission direction of the light of the LED 3) is larger than the half-value angle of the LED 3. Specifically, it may be in the range of 0 [degree] to 50 [degree] with respect to the half-value angle of the LED 3. Preferably, it may be in the range of 20 [degrees] to 40 [degrees] with respect to the half-value angle of LED3. By setting this range, it is possible to prevent the shadow of the standing portion 25 from appearing in the ultraviolet irradiation device 1 during irradiation.

(3) Cover member The cover member will be described mainly with reference to FIGS.
The cover member 9 has a long shape. The cross-sectional shape of the cover member 9 is constant with respect to the longitudinal direction. The cover member 9 has an opening on the lower side and has a shape in which a circular circular lower portion is cut out. An end portion (opening end portion) facing the opening in the cover member 9 is a bent portion 29 toward the center of the cylinder not cut out at the lower portion.
The cover member 9 is attached to the base member 7 by inserting the bent portion 29 into the space formed between the base body 17 and the bent portion 31 from the end surface of the base member 7. Since the bent portion 29 extends toward the center of the cylinder and the bent tip of the bent portion 31 of the base member 7 has a circular shape, the cover member 9 can be prevented from being detached from the base member 7.

The cover member 9 has a diffusion groove 35 extending in the longitudinal direction of the cover member 9 on the inner peripheral surface in the cross section. A plurality of diffusion grooves 35 are formed at equal intervals in the circumferential direction. The depth of the diffusion groove 35 is in the range of 0.1 [mm] to 0.5 [mm], and the cross section of the diffusion groove 35 has a “V” shape, and the angle is 1.2 [°. ] To 3.8 [°]. Thereby, the light emitted from the LED 3 is diffused.
The cover member 9 is made of an acrylic resin having high ultraviolet transparency (for example, Kuraray Co., Ltd., trade name: Paragrass, product number: UV00, etc.). Note that the above-described diffusion groove 35 is effective because a cover in which diffusion particles such as silicone fine particles are mixed in an acrylic resin (a so-called milky white cover) does not transmit ultraviolet light.

(4) Lighting circuit A description will be given mainly with reference to FIGS.
The lighting circuit 11 converts commercial power received via the base member 13 into DC power and supplies it to the LED module 5. The lighting circuit 11 includes, for example, a rectifier circuit, a smoothing circuit, and an electric conversion circuit.
An electronic component 37 constituting the lighting circuit 11 is mounted on a circuit board 39. In the figure, only a capacitor appears as the electronic component 37. The lighting circuit 11 is accommodated in the base member 13. The fixing of the lighting circuit 11 will be described later.
The lighting circuit 11 is configured to supply a current of 200 [mA] to 400 [mA] to the LED 3 (note that the power of the LED 3 in this case is 0.7 [W] to 2.0 [2.0]. W].) Thereby, the radiation intensity of the ultraviolet-ray radiate | emitted from LED3 can be improved. Moreover, since the radiation intensity can be improved, the pitch of the LEDs 3 can be increased, and the number of LEDs 3 to be used can be reduced. In particular, since a current lower than the rated current is supplied to the high-output type LED 3, the efficiency becomes high. Here, the “high output type” means that the rated power is 1 [W] or more. Since the high-power type LED has a large chip and high efficiency, the light extraction efficiency is further improved.

(5) Base member 13
The base member 13 is configured to be attachable to a socket of an instrument body to which a current black light fluorescent lamp is detachably attached. The base member 13 includes a resin-made bottomed cylindrical body 45 having a bottom wall 41 and a cylindrical wall 43, and a base pin 47 provided on the bottom wall 41 of the bottomed cylindrical body 45. Here, the cap pin 47 is of the G type. Moreover, the bottomed cylinder 45 is black. This makes it easier to recognize that the ultraviolet irradiation device is black light.
The base pin 47 includes a base portion 49 that is disposed inside the bottomed cylindrical body 45 and attached to the bottom wall 41, and a pin portion 51 that extends from the bottom wall 41 to the outside. Although there are two pin portions 51, the two pin portions 51 extend from one base portion 49.
The bottomed cylinder 45 has a step 43 a on the cylinder wall 43. The step 43 a is provided at least on the opening side of the base portion 49 of the base pin 47. The step 43a is a step whose diameter increases on the opening side. The cylindrical wall 43 has attachment means 53 for attaching the base member 13 to the base member 7 on the side where the base member 7 is present in the ultraviolet irradiation device 1.

Here, the screw member 55 is used to attach the base member 7 of the base member 13. For this reason, the cylindrical wall 43 has the attachment recessed part 57 for attaching the screw member 55, and the thickness of the part which the screw member 55 penetrates is thick.
The bottom wall 41 is provided with a boss portion 59 extending to the position of the step 43a. The boss portion 59 is provided with a screw hole.
The circuit board 39 of the lighting circuit 11 has a shape corresponding to the inner peripheral surface of the cylindrical wall 43. When the lighting circuit 11 is inserted from the opening of the bottomed cylindrical body 45, the peripheral edge of the circuit board 39 contacts the step 43a. It comes to touch. In this state, the circuit board 39 has a through hole in a portion corresponding to the screw hole of the boss portion 59 of the bottom wall 41, and the lighting circuit 11 is fixed inside the base member 13 by the screw body 61 inserted through the through hole. Is done.

3. Example (1) Product 1
An embodiment of the invention to which the present invention is applied will be described.
The inventive ultraviolet irradiation device has a diameter of 32.5 [mm] and a total length of 1,198 [mm]. The number of LEDs is ten. The input current to the LED is 270 [mA], and the lamp power is 10 [W]. The pitch of the LEDs is 110 [mm]. The intensity of ultraviolet radiation is 66 [μW / cm ² ]. The lifetime of the ultraviolet irradiation device is 20,000 [hours].
(2) Implemented product 2
Another embodiment of the invention to which the present invention is applied will be described.
The inventive ultraviolet irradiation device has a diameter of 32.5 [mm] and a total length of 1,198 [mm]. The number of LEDs is 18. The input current to the LED is 300 [mA]. The pitch of the LEDs is 60 [mm]. The lamp power is 20 [W]. The radiation intensity of ultraviolet rays is 140 [μW / cm ² ]. The lifetime of the ultraviolet irradiation device is 20,000 [hours].
(3) Current Black Light Fluorescent Lamp The current black light fluorescent lamp having the same size as the products 1 and 2 will be described.
The black light fluorescent lamp has a diameter of 32.5 [mm] and a total length of 1,198 [mm]. The lamp power is 40 [W]. The intensity of ultraviolet radiation is 66 [μW / cm ² ]. The lifetime of the black light fluorescent lamp is 5,000 [hours].

<Modification>
The ultraviolet irradiation device according to the embodiment has been described above. However, the present invention is not limited to this embodiment. For example, the following modification may be used. Moreover, what combined embodiment and the modification may be sufficient, and what combined the modification may be sufficient. Moreover, even if there is a design change within a range that does not deviate from the gist and the example that are not described in the embodiment and the modification, it is included in the present invention.

1. Black Light The ultraviolet irradiation device 1 according to the embodiment is an alternative to the current black light fluorescent lamp. That is, the ultraviolet irradiation device 1 can be used by being detachably attached to a lighting fixture to which the current black light fluorescent lamp is attached.
However, the ultraviolet irradiation device may have a structure that has a dedicated connection terminal other than the G type, for example, and is attached to a dedicated lighting fixture. Moreover, you may comprise as a ultraviolet irradiation device which connects a commercial power source directly to a ultraviolet irradiation device and does not use a lighting fixture etc.
When not intended for black light replacement, the external shape of the housing does not have to be cylindrical, and may be, for example, a shape in which the cross section is a quadrangle and the overall shape is a cylinder. In this case, for example, the shape of the cover member may be a linear “U” shape, and the shape of the base member may be a rectangular shape. In addition, since the base member has a heat sink function for releasing heat at the time of LED light emission, the base member is preferably exposed to the outside.

2. Cover member The diffusion groove 35 of the cover member 9 extends along the long longitudinal direction, but may extend in the short direction, for example. Further, the coupling with the base member may be other than the locking structure. For example, you may couple | bond with a screw | thread or an adhesive agent.
3. Base member The base member 7 is exposed to the outside except for the portion where the LED module 5 is mounted, but when the amount of heat generated during LED emission is small (for example, when the input current of the LED is small). It does not have to have a portion exposed to the outside.
As an example that is not exposed to the outside, as shown in FIG. 5, there is a lighting device 101 in which a base member 107 is arranged inside a cylindrical cover member 109. The base member 107 is fixed to the base member 13 via the screw member 55 while being locked by the ribs 109a and 109b of the cover member 109. The LED module 105 is attached to the base member 107 by the locking pieces 107 a and 107 b of the base member 107.
<Others>
(1) Although the ultraviolet LED is used in the embodiment, for example, an LED emitting blue light may be mixed. Thereby, the insect repellent effect can be improved. Furthermore, you may mix LED which emits white light (utilizing fluorescent substance) based on blue light. In this case, in addition to the effect of ultraviolet rays and the insect repellent effect, the effect as working illumination can be obtained. In addition to the ultraviolet LED, a white LED may be provided as work illumination.
(2) In the embodiment, by supplying a current lower than the rated current (40 (%) to 60 (%) of the rated current) to the high output type LED, the light extraction efficiency with respect to the input current ( Luminous efficiency). This is applicable not only to ultraviolet LEDs but also to blue LEDs and white LEDs. In other words, from the viewpoint of improving the light extraction efficiency, there is another invention in which a high-power type LED emits light at a current value lower than the rated current, and the other invention is only the ultraviolet irradiation device described in the embodiment. In addition, the present invention can be applied to an irradiation device for general illumination. In this case, the cover member made of a resin material may have diffusion particles (a so-called milky white cover). Moreover, although it is better to have the diffusion groove of the cover member, the diffusion groove may not be provided depending on the amount of diffusion particles mixed.
When paying attention to the current supplied to the LED, the cross section of the cover body is a “C” shape, but there is no particular limitation. For example, it may be a cross section having no opening as described above. However, it may have a cross-sectional shape other than a circle (for example, a polygonal shape).
(3) In the embodiment, the current supplied to the LED is the rated current or a lower current, but a lower current may be supplied. In this case, the base member does not have a function as a heat sink but has a function of mounting the LED module.
When a low current is supplied to the LED, the amount of heat generation can be suppressed, and thus the LED module may be directly mounted on the cover member. In this case, the cover member may have a cross-sectional shape having no opening.
As an example of using a cover member that does not have a base member and does not have openings at both ends, as shown in FIG. 6, an illumination device 201 in which an LED module 205 is arranged inside a cylindrical cover member 209. There is. The LED module 205 is fixed to the base member 13 with an adhesive in a state where both ends of the mounting substrate 215 in the short direction are inserted into the pair of mounting grooves 209a and 209b of the cover member 209.

1 UV illumination device 3 LED
5 LED module 6 Housing 7 Base member 9 Cover member 11 Lighting circuit 13 Base member

Claims (3)

A casing having a translucent cover having a “C” shape in cross section and an arcuate base member for closing the opening of the translucent cover, and having an outer appearance of a cylindrical shape;
An LED module in which a plurality of LEDs emitting ultraviolet rays are mounted on a mounting substrate and housed in the housing;
A base member attached to an end of the housing;
An ultraviolet irradiation device comprising a lighting circuit for receiving power from the base member and lighting the LED module. The mounting substrate has a long strip shape in the longitudinal direction of the housing,
The ultraviolet irradiation device according to claim 1, wherein the LEDs are mounted with an interval of 50 mm to 150 mm in the longitudinal direction of the mounting substrate. The ultraviolet irradiation device according to claim 1, wherein the lighting circuit supplies a current of 200 mA to 400 mA to the LED.

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