JP2015065057A - Light-emitting element unit, light source device, and irradiator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light-emitting element unit capable of being disposed in a compactly arranged manner.SOLUTION: In an LED unit 20 for applying linear light, a pair of trough-type reflectors 52 is provided with a row of ultraviolet LEDs 51A in between on a substrate 50 where the ultraviolet LEDs 51A are linearly arrayed. The LED unit 20 comprises a wiring bus bar 53 that supplies electric power to the ultraviolet LEDs 51A. A storage recess 56 is provided in an outside surface 52A of the trough-type reflector 52, and the wiring bus bar 53 is housed in the storage recess 56.

Description

  The present invention relates to a technique for irradiating line-shaped light.

Conventionally, a light source unit is known in which a plurality of light emitting elements are arranged in a line, and the light from these light emitting elements is collected at a predetermined location by a reflecting mirror to obtain line light, and an ultraviolet curing agent is cured. (See, for example, Patent Document 1).
On the other hand, a technique for efficiently curing the ultraviolet curing agent by obtaining a high irradiation intensity while keeping the distance from the light source short and constant has also been proposed (for example, see Patent Document 2).

JP 2010-110938 A JP 2013-22531 A

In order to obtain high irradiation intensity at a short distance using a light source unit including a light emitting element and a reflecting mirror, it is necessary to provide a plurality of light source units. However, when conventional light source units are arranged, there is a problem that the width in the arrangement direction increases.
The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a light emitting element unit that can be arranged in a compact manner, a light source device including the light emitting element unit, and an irradiator including the light source device. And

  In order to achieve the above object, the present invention provides a light emitting element unit that irradiates linear light by providing a pair of reflecting mirrors on a substrate in which light emitting elements are arranged in a line, with the array of light emitting elements interposed therebetween. A bus bar for supplying power to the light emitting element is provided, a recess is provided on the outer surface of the reflecting mirror, and the bus bar is housed in the recess.

  According to the present invention, in the light emitting element unit, a flat portion that avoids interference with a reflecting mirror of another light emitting element unit is provided on a distal end side of the outer surface of the reflecting mirror.

  According to the present invention, in the light emitting element unit, an auxiliary reflecting plate that closes end portions of the pair of reflecting mirrors is provided at both end portions of the light emitting element array.

  According to the present invention, in the light emitting element unit, a circuit board having a lighting circuit for the light emitting element is provided on the back side of the auxiliary reflector.

  In order to achieve the above object, the present invention provides a plurality of light emitting element units according to any one of the above, a mounting base in which each of the light emitting element units is mounted in parallel on a mounting surface, and mounting of the mounting base A cooling unit provided on the opposite side of the surface, the mounting surface of the mounting base is curved in a concave shape, and in accordance with the curvature of the mounting surface, both ends of the opposite surface have the same thickness as the central portion. Provided is a light source device that is recessed.

  In order to achieve the above object, the present invention comprises the above light source device, and each of the light emitting element units is collected at the condensing point along an arc having a predetermined central angle centered on the predetermined condensing point. There is provided an irradiator characterized by being arranged side by side so as to emit light, and provided with a transport surface of an object to be irradiated with light at the condensing point.

  According to the present invention, since the bus bar for supplying power to the light emitting element is housed in the recess on the outer surface of the reflecting mirror, a light emitting element unit with a reduced lateral width can be obtained, and a compact device can be realized even when arranged side by side. it can.

It is a figure which shows the whole structure of the irradiator which concerns on embodiment of this invention, (A) is the perspective view seen from the upper side, (B) is the perspective view seen from the lower side. It is a figure which shows the structure of an irradiator, (A) is a front view, (B) is a side view. It is AA sectional drawing of FIG. 2 (B). It is a figure which shows the irradiator of the state which opened the lamp | ramp unit and the bottom part unit, (A) is the perspective view seen from the upper side, (B) is the perspective view seen from the lower side. It is a disassembled perspective view of an irradiator. It is a perspective view which shows the irradiator which removed the upper case body. It is a side view of a light source device. It is a bottom view of a light source device. It is a perspective view of a light source unit and a cooling unit. It is a disassembled perspective view of a light source unit and a cooling unit. It is a perspective view of an LED unit. It is a disassembled perspective view which shows the structure of the cooling mechanism of a light source device.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1A and 1B are diagrams showing an overall configuration of an irradiator 1 according to the present embodiment. FIG. 1A is a perspective view seen from the upper side, and FIG. 1B is a perspective view seen from the lower side. 2A and 2B are diagrams showing a configuration of the irradiator 1, in which FIG. 2A is a front view and FIG. 2B is a side view. 3 is a cross-sectional view taken along the line AA in FIG. In FIG. 3, the cross-sectional lines are omitted in order to avoid complicated drawing.
The irradiator 1 irradiates a seal label S, which is an example of a sheet-like object, with UV rays in a line shape, and cures the UV curable agent applied to the seal label S. FIGS. As shown in FIG. 4, the device body 2 has a substantially square columnar shape. A conveyance path 13 penetrating left and right is provided on the side surface of the instrument body 2, and the seal label S is conveyed to the conveyance path 13 and passes through the interior of the instrument body 2 as shown in FIG. 1. Irradiated with UV light.

The appliance main body 2 includes a lamp unit 3 and a bottom unit 4, which are connected to each other by a hinge 7 on the back side so as to be opened and closed. As shown in FIG. 2, a latch mechanism 8 for fastening the lamp unit 3 and the bottom unit 4 is provided on the front side of the irradiator 1.
As shown in FIG. 3, the lamp unit 3 is a substantially rectangular parallelepiped unit including a light source device 5 that irradiates linear ultraviolet rays. A substantially rectangular irradiation opening 6 is provided on the bottom surface 3 </ b> A of the lamp unit 3, and light from the light source device 5 is irradiated through the irradiation opening 6. The bottom unit 4 is a substantially flat member that covers the bottom surface 3A of the lamp unit 3 and shields ultraviolet rays. A hollow portion is appropriately formed inside the bottom unit 4 to reduce the weight.

FIG. 4 is a diagram showing the lamp unit 3 and the irradiator 1 in a state where the bottom unit 4 is opened, FIG. 4 (A) is a perspective view seen from the upper side, and FIG. 4 (B) is seen from the lower side. It is a perspective view.
A grip portion 9 is provided on the front side of the lamp unit 3, and the lamp unit 3 is opened when an operator or the like grips and lifts the grip portion 9 with the latch mechanism 8 released. An upper end portion 10A of the support bar 10 is rotatably attached to the side surface of the lamp unit 3 on the back side, and a latching groove 10C of the lower end portion 10B of the support bar 10 is provided. The latching groove 10C is configured to be latched by a latching pin 11 provided on the rear side surface of the bottom unit 4. In the latching state, the lamp unit 3 is held open, and the irradiation opening 6 Maintenance such as cleaning is performed.
Further, on the upper surface 4 </ b> A of the bottom unit 4, a conveyance path recess 12 having a rectangular cross section is formed corresponding to the irradiation opening 6 of the lamp unit 3. As shown in FIGS. 1 to 3, the conveyance path 13 that penetrates the irradiator 1 in the width direction is formed between the conveyance path recess 12 and the bottom surface 2 </ b> A of the lamp unit 3.

FIG. 5 is an exploded perspective view of the irradiator 1. In addition, illustration of LED unit 20 (FIG. 3) with which the light source device 5 is provided is abbreviate | omitted in FIG.
The lamp unit 3 includes a case body 15 including a lower case body 15A and an upper case body 15B which are divided into upper and lower parts. A protective glass plate 16 made of an ultraviolet transmissive material that closes the irradiation opening 6 is attached to the lower case body 15 </ b> A by a window frame 17. On the other hand, a support unit 18 that supports the light source device 5 is attached to the upper case body 15B. The support unit 18 includes a pair of L-shaped angles 19 arranged to face each other, and each is fixed to the inner side surface of the upper case body 15B with a bolt as shown in FIG.

FIG. 6 is a perspective view showing the irradiator 1 with the upper case body 15B removed. FIG. 7 is a side view of the light source device 5, and FIG. 8 is a bottom view of the light source device 5.
As shown in FIG. 3, the light source device 5 is a device that collects ultraviolet rays at a condensing point F and irradiates a line-shaped irradiation light. As shown in FIG. 3) light source units 30, a cooling mechanism 70, and a power bus bar 33.
The light source unit 30 has a substantially rectangular parallelepiped shape and irradiates ultraviolet rays in a line shape from the bottom surface, and these are continuously provided in a straight line shape. As shown in FIG. 3, each light source unit 30 includes a plurality (four in the illustrated example) of LED units 20 that irradiate ultraviolet rays.
The cooling mechanism 70 cools each light source unit 30 by circulating cooling water as a refrigerant. As shown in FIGS. 6 and 7, the cooling unit 22 provided for each light source unit 30, and the light source unit 30. The water channel entrance / exit unit 31 and the water channel terminal unit 32 are provided at both ends of the line. As shown in FIGS. 7 and 8, a pair of support frames 38 are extended between the water channel inlet / outlet unit 31 and the water channel terminal unit 32, and the support frames 38 support the pair of support frames 38. Each light source unit 30 is supported.

FIG. 9 is a perspective view of the light source unit 30 and the cooling unit 22, and FIG. 10 is an exploded perspective view of the light source unit 30 and the cooling unit 22. FIG. 11 is a perspective view of the LED unit 20.
As shown in FIGS. 3 and 10, the light source unit 30 includes a mounting base 40, an auxiliary reflector 41, a circuit board 42, and an insulating plate 43 in addition to the plurality of LED units 20 described above. Yes. The attachment base 40 is a base member having a substantially rectangular plate shape in plan view to which the LED unit 20 is attached, and is formed from a high thermal conductivity material such as aluminum.

As shown in FIG. 10, the LED unit 20 includes an elongated rectangular plate-like substrate 50 having a width W, an LED package 51 mounted on the substrate 50, and a pair of trough-type reflections provided between the LED packages 51. A mirror 52 and a pair of wiring bus bars 53 are provided.
The substrate 50 is a mounting substrate formed of a high thermal conductivity material such as aluminum, and is mounted in close contact with the surface 40A of the mounting base 40. As shown in FIGS. 9 and 10, the LED package 51 is configured by arranging the ultraviolet LEDs 51 </ b> A in a straight line, and constitutes a straight line light source. In the light source unit 30, the heat generated by the LED package 51 is quickly transmitted to the mounting base 40 through the substrate 50 and is cooled by the cooling unit 22.

The pair of trough type reflecting mirrors 52 is a reflection type condensing optical system extending along the LED package 51, and collects ultraviolet rays at a condensing point F that is separated from the LED package 51 by a predetermined distance. As shown in FIG. 3, the predetermined distance is defined such that when the light source device 5 is provided in the irradiator 1, the condensing point F is positioned on the transport surface of the seal label S. In this irradiator 1, the condensing point F is set at a position about 7 to 10 mm away from the protective glass plate 16.
In addition, the pair of wiring bus bars 53 are formed of a copper material having conductivity and are elongated plate-like members that transmit the lighting power of the LED package 51, and along the LED package 51 on both sides of the LED package 51. Is extended. A connection piece 53A electrically connected to the mounting surface of the substrate 50 is brought into contact with each of the pair of wiring bus bars 53, and one wiring bus bar 53 is connected to a high potential and the other is connected to a ground potential. The Thereby, the lighting power is supplied to each ultraviolet LED 51 </ b> A of the LED package 51 through the substrate 50 between the pair of wiring bus bars 53.

  The light source unit 30 includes four LED units 20, which are arranged side by side so as to collect light at the condensing point F, thereby increasing the amount of light at the condensing point F, and the ultraviolet light of the seal label S. A sufficient amount of light necessary for curing can be obtained. Specifically, as shown in FIG. 3, the condensing point F is set immediately below the center of the light source unit 30 in the width direction, and each LED unit 20 follows an arc Q centered on the condensing point F. Thus, the optical axis K is arranged in a posture passing through the condensing point F. A mounting surface 40A1 of each LED unit 20 is formed on the surface 40A of the mounting base 40, and the mounting posture of each LED unit 20 is defined as described above by the shape of each mounting surface 40A1.

However, since the conveyance path 13 of the irradiator 1 has a height Ha that is larger than the thickness of the seal label S, the conveyance surface of the seal label S may be displaced in the height direction from the condensing point F. . For this reason, when the irradiance difference in the height direction is large at the condensing point F, unevenness in ultraviolet curing occurs, leading to quality degradation. Therefore, in the light source unit 30, as shown in FIG. 3, when the horizontal plane (conveying surface) passing through the condensing point F is used as an angle reference (angle = 0 degrees), the condensing point F is 60 degrees as a center. The LED units 20 are arranged such that the optical axis K of each LED unit 20 is within an arc Q of an angle range α (that is, the central angle is 60 degrees) of ˜120 degrees.
Thereby, the irradiance difference in the height direction at the condensing point F is suppressed to within about 95%, and high-quality irradiation becomes possible.
Furthermore, since the optical axis K of all the LED units 20 is within a narrow angle range α of 60 ° to 120 ° with the condensing point F as the center, the lateral width of the irradiation spots of these LED units 20 is also a relatively narrow range. Can be suppressed. Therefore, since the ultraviolet rays are limited to the range of the substantially central portion sufficiently deep from the entrance / exit of the conveyance path 13, it is possible to suppress the leakage of the ultraviolet rays from the entrance / exit, It is not necessary to extend the width of the irradiator 1 excessively. Note that leakage of ultraviolet rays may be reliably prevented by separately providing a cylindrical flange extending in the horizontal direction at the entrance / exit of the conveyance path 13.

As described above, in the light source unit 30, the plurality of LED units 20 are arranged side by side so that each optical axis K is within a predetermined angle range α around the condensing point F. However, such arrangement becomes difficult when the lateral width of the LED unit 20 is large and the arrangement interval is wide.
Therefore, in this LED unit 20, as shown in FIG. 3 and FIG. I am doing so. That is, as shown in FIG. 3, when the substrates 50 of the plurality of LED units 20 are arranged with a small gap or without a gap along an arc Q centered on the condensing point F, the trough type In order to prevent the reflecting mirror 52 from interfering, a flat surface portion 54 that avoids interference is provided at the tip of the outer surface 52A of the trough-type reflecting mirror 52.
With such a configuration of the trough-type reflecting mirror 52, even if the LED unit 20 is configured to include a reflective optical system such as the trough-type reflecting mirror 52 in the light control member, the plurality of LED units 20 are closely packed in a narrow range. Can be placed.

Further, in this LED unit 20, in order to suppress the lateral width W of the substrate 50, the wiring bus bar 53 is not provided between the mounting surface of the substrate 50 and the pair of trough reflectors 52 as shown in FIG. The trough-type reflecting mirror 52 is housed in the outer surface 52A.
Specifically, an accommodation recess 56 is provided on the outer side surface 52 </ b> A of each of the pair of trough reflectors 52, and the wiring bus bars 53 are accommodated in the accommodation recess 56. The pair of trough-type reflecting mirrors 52 are condensing reflecting mirrors that form an elliptical reflecting surface or a parabolic reflecting surface with the LED package 51 interposed therebetween, so that the thickness of the base end portion 55 is smaller than that of the leading end side. A housing recess 56 that is sufficiently thick and deep enough to accommodate the wiring bus bar 53 is provided. Therefore, in this LED unit 20, the wiring bus bar 53 is formed on the outer surface 52 </ b> A of the trough-type reflecting mirror 52 by providing an accommodation recess 56 having a depth equal to or greater than the thickness of the wiring bus bar 53 on the base end portion 55 side. It does not protrude outward. Thereby, the lateral width of the LED unit 20 is reliably accommodated in the lateral width W of the substrate 50.
According to this LED unit 20, even if it is a structure provided with the wiring bus bar 53, since the horizontal width is suppressed to the same extent as the horizontal width W of the board | substrate 50, even when arrange | positioning the several LED unit 20 side by side, the whole The width of can be made compact.
In addition, since a larger number of LED units 20 can be arranged in a range of the predetermined angle α with the condensing point F as the center, it is easy to increase the output at the condensing point F.

Returning to FIG. 9 and FIG. 10 described above, the light source unit 30 includes auxiliary reflectors 41 arranged facing each other at both ends in the longitudinal direction of the mounting base 40. Both ends in the longitudinal direction of the trough-type reflecting mirror 52 of each LED unit 20 are covered in a closed state by the reflecting surfaces 41A (FIG. 10) of the pair of auxiliary reflecting plates 41, and the light leaking outward in the longitudinal direction is reflected and the irradiation efficiency Has been increased.
The circuit board 42 is disposed on the back surface (surface opposite to the reflection surface 41 </ b> A) 41 </ b> B of the auxiliary reflection plate 41 so as to overlap the auxiliary reflection plate 41. The circuit board 42 is a board on which a lighting circuit for lighting the LED package 51 by controlling power feeding to the wiring bus bar 53 and other circuits (including wiring patterns) are mounted. By disposing the circuit board 42 on the back surface 41B of the auxiliary reflector 41, the circuit board 42 is prevented from being exposed to the light of the light source unit 30, and durability is improved. In particular, since the light source unit 30 irradiates ultraviolet rays, the circuit board 42 is prevented from being deteriorated by ultraviolet rays.

Each of the circuit board 42 and the auxiliary reflector 41 is provided with insertion openings 57 and 58, as shown in FIG. Connected. Further, the circuit board 42 is appropriately provided with a lead-out hole 59 for transmitting power and various signals.
In the light source device 5, as shown in FIG. 7 and FIG. 8, a plurality of light source units 30 are connected to each circuit board 42 back to back, thereby extending the total length of line-shaped ultraviolet rays. Between these, as shown in FIG. 10, an insulating plate 43 for electrical insulation is provided. By arranging the circuit board 42 on the continuous surface between the light source units 30, the height dimension of the light source unit 30 can be suppressed.

FIG. 12 is an exploded perspective view showing the configuration of the cooling mechanism 70 of the light source device 5.
The cooling mechanism 70 cools the light source unit 30 with water, and includes the cooling unit 22, the water channel inlet / outlet unit 31, and the water channel terminal unit 32 provided for each light source unit 30 as described above.
As shown in FIG. 10, the cooling unit 22 is provided so as to cover the back surface 40B of the mounting base 40 of the light source unit 30, and cools the LED unit 20 through the mounting base 40. FIGS. As shown in FIG. 4, a water cooling jacket 60 and a water channel device 61 are provided. The water cooling jacket 60 is formed from a high thermal conductivity material such as a copper nickel alloy, and supports the mounting base 40 in contact with the entire back surface 40B and the mounting base 40 in close contact with the water cooling portion 62. The support piece 65 is integrally provided. In the water cooling section 62, a flow path 63 through which the cooling water circulates is formed on the entire surface opposite to the contact surface of the mounting base 40.

  The water channel device 61 is a plate-like member that forms a water channel for supplying and discharging cooling water to the flow channel 63 of the water cooling jacket 60. As shown in FIG. 12, the water channel device body 61A and the lid body 61B are connected to each other. I have. The water channel main body 61A is a substantially rectangular plate-like member, and water channels 68 and 68 including two concave grooves extending in the longitudinal direction are provided in the surface thereof. The lid 61B covers the water channel body 61A and closes the upper sides of the two water channels 68, 68. Each of the water channels 68 and 68 is connected in series with the other cooling unit 22 and the packing 89, one is a supply channel for supplying cooling water to each light source unit 30, and the other is for supplying cooling water via each light source unit 30. Functions as a drainage channel to collect and drain. Each cooling unit 22 is connected by a unit connection concave / convex shaft 66, and a sheet-like packing 67 is sandwiched between the water passages 68, 68.

As shown in FIG. 10, the water channel device 61 is attached so as to cover the water cooling jacket 60 with a gap therebetween. On the bottom surface of the water channel device 61, there are provided through holes (not shown) in which the respective water channels 68, 68 are connected to the flow channel 63 of the water cooling jacket 60. Thereby, the cooling water is supplied from the water channel 68 on the supply side of the water channel device 61 to the water cooling jacket 60, the mounting base 40 is cooled via the flow channel 63, and is discharged to the water channel 68 on the discharge side of the water channel device 61. .
As the mounting base 40 is cooled, each of the LED units 20 is cooled. As described above, each LED unit 20 has the arc Q on the surface 40A of the mounting base 40 as shown in FIG. It is attached so that it may line up along. For this reason, when the back surface 40 </ b> B of the mounting base 40 is a uniform flat surface, the distance between the LED unit 20 at both ends from the water cooling jacket 60 is longer than the center LED unit 20. As a result, the LED units 20 at both ends are not sufficiently cooled, and the light emission performance differs from the other LED units 20, which may cause uneven light emission.

  Therefore, as shown in FIG. 3, the mounting base 40 of the cooling unit 22 has a back surface so that the thickness of the front surface 40A and the back surface 40B is approximately equal to the shape of the front surface 40A (the arc Q in which the LED units 20 are arranged). 40B is formed in steps. In addition, the contact surface of the water cooling portion 62 of the water cooling jacket 60 is also formed in a step shape so as to overlap the stepped back surface 40B without a gap. Thereby, the distance from each LED unit 20 to the water-cooling jacket 60 becomes substantially equal, and cooling is performed uniformly.

Returning to FIG. 12, the water channel unit 31 includes the water channels 68 and 68 of the water channel 61, the inlet 73 provided on the back plate 1 </ b> B (FIG. 5) of the irradiator 1, and the drain 74 (FIGS. 5), and includes a pair of one-touch joints 75, 75, an inlet / outlet connection unit main body 76, and a water conduit merging unit 77.
The one-touch type joints 75 and 75 are joints connected to the injection port 73 and the drain port 74 with rod-shaped connection pipes 79 and 79. The one-touch joints 75 and 75 are configured such that the connection ports 75A and 75A of the connecting pipes 79 and 79 can be pushed in the insertion direction. By pushing the connection ports 75A and 75A, the connection with the connecting pipes 79 and 79 is released and the connection ports 75A and 75A can be inserted and removed. As shown in FIGS. 5 and 6, the cooling mechanism 70 is provided with a push operation plate 80 through the connecting pipes 79, 79. By moving the push operation plate 80 along the connecting pipes 79 and 79 toward the one-touch joints 75 and 75, the two connecting ports 75A and 75A are simultaneously pushed, and the connecting pipes 79 and 79 can be easily operated. Can be inserted and removed.

The inlet / outlet connection unit main body 76 and the water channel unit merging unit 77 are units for connecting the one-touch type joints 75 and 75 and the water channels 68 and 68 of the water channel unit 61. Connected, the conduit unit 77 is connected to the conduit 61. The water channel terminal unit 32 is a plate-like member that terminates ends of water channels 68 and 68 formed by connecting a plurality (in the illustrated example) of water channels 61 in series.
Thus, since the light source device 5 is water-cooled by providing the cooling units 22 on the upper sides of the light source units 30, sufficient cooling can be obtained even when the output of the light source unit 30 is increased.

Further, in the light source device 5, when the light source unit 30 has a high output, it is necessary to supply a relatively large amount of power to each light source unit 30. A rectangular plate-shaped power bus bar 33 made of a highly conductive material such as the like is used.
Furthermore, in this light source device 5, the water channel device 61 which comprises the upper surface of the cooling unit 22 which covers each light source unit 30 is formed with an electrically insulating material, and a terminal is provided on the upper surface of the water channel device 61 as shown in FIG. The pedestal 81 is integrally formed. The electric power bus bar 33 extends over each water conduit 61 and is fixed to the terminal base 81 with screws. In addition to being formed of an electrical insulating material, the water channel 61 has high electrical insulation performance since the water channels 68 and 68 are provided therein. The water passage 61 ensures high electrical insulation between the power bus bar 33 and the light source unit 30 or the water cooling jacket 60. As a material for the water channel 61, for example, a resin material such as polycarbonate is preferably used.
On the other hand, drawing recesses 82 and 83 are formed on the side surfaces of each water channel device 61 and the water cooling jacket 60, and the wiring extending from the circuit board 42 of the LED unit 20 is drawn out to the power bus bar 33 through these. The terminal base 81 is screwed in a conductive state.

As described above, in the light source device 5, the water passage 61 made of an electrical insulating material is disposed on the upper surface of the cooling unit 22 that covers the light source unit 30, and the power bus bar 33 is provided thereon. Thereby, the height of the light source device 5 is suppressed, and the device can be made compact.
3, in the irradiator 1, the light source device 5 is housed in the case body 15, and the top surface 15B1 of the upper case body 15B faces the upper side. As for electrical insulation between the top surface 15B1 and the power bus bar 33, sufficient insulation performance is obtained by a gap of about several millimeters and the insulating sheet 85 attached to the top surface 15B1.

As described above, according to the present embodiment, the following effects can be obtained.
That is, according to the present embodiment, the water conduit 61 made of an electrically insulating material is provided so as to cover the upper surface of the cooling unit 22 provided on the upper surface of the light source unit 30, and the power bus bar 33 is provided on the upper surface of the water conduit 61. It was set as the structure provided. With this configuration, it is possible to sufficiently cool the light source unit 30 while suppressing the height by cooling by circulating the cooling water. In addition, since the power bus bar 33 is provided on the upper surface of the water conduit 61 made of an electrical insulating material on the upper surface of the cooling unit 22, the height is suppressed while ensuring electrical insulation of the power bus bar 33. A compact light source device 5 is obtained.

  Further, according to the present embodiment, the cooling unit 22 is provided so as to overlap the water cooling jacket 60 that covers the upper surface of the light source unit 30 and cools the water, and supplies cooling water to the water cooling jacket 60. And a water channel device 61 formed of an electrical insulating material to be discharged. Thereby, the water channel device 61 which is an electrical insulating material having sufficient insulation performance is disposed on the upper surface of the cooling unit 22, and sufficient electrical insulation of the power bus bar 33 can be secured.

Further, according to the present embodiment, the light source unit 30 includes the circuit board 42 having the lighting circuit, and the circuit board 42 is arranged on the connection surface with the other light source units 30.
Thereby, the height dimension of the light source unit 30 can be suppressed more compactly.

Moreover, according to this embodiment, the light source unit 30 has the LED package 51 which is a plurality of lines of linear light sources provided in parallel, and the trough-type reflecting mirror 52 provided for each LED package 51. Each of the package 51 and the trough-type reflecting mirror 52 is configured to be arranged on an arc Q in a range of 60 degrees to 120 degrees with a predetermined condensing point F as the center.
Thereby, the irradiance difference in the vicinity of the condensing point F is sufficiently suppressed.
In the irradiator 1, since the transport surface is provided at the condensing point F, even when the irradiated object is shifted in the height direction from the transport surface by transport, the predetermined illuminance is not affected by the deviation. Can be irradiated with light.

  Further, according to the present embodiment, since the housing recess 56 is provided on the outer surface 52A of the trough-type reflecting mirror 52 and the wiring bus bar 53 is accommodated, the LED package 51 and the trough-type reflecting mirror 52 can be densely arranged side by side. The width can be stored compactly.

Further, according to the present embodiment, the flat surface portion 54 that avoids interference with the trough-type reflecting mirror 52 of the other LED unit 20 is provided on the distal end side of the outer surface 52A of the trough-type reflecting mirror 52.
Thereby, the LED units 20 can be densely arranged side by side in a narrow range. In particular, the width of the pair of trough reflectors 52 can be more closely arranged by keeping the width W of the substrate 50 within the width W.

  Further, according to the present embodiment, in the irradiator 1, since the insulating sheet 85 that electrically insulates the power bus bar 33 is provided on the top surface 15B1 of the case body 15 facing the power bus bar 33, The electrical insulation between the power bus bar 33 and the case body 15 is also sufficiently ensured. Further, even if the top surface 15B1 is recessed by some external force, the insulating sheet 85 is interposed therebetween to prevent contact with the power bus bar 33.

  Further, according to the present embodiment, the light source unit 30 is configured to include the auxiliary reflector 41 that closes the ends of the pair of trough reflectors 52 provided in the LED unit 20. Thereby, the leakage light from the longitudinal direction of the trough-type reflecting mirror 52 is reflected by the auxiliary reflecting plate 41, and the irradiation efficiency of the LED unit 20 is enhanced.

  Further, according to the present embodiment, the light source unit 30 is configured to provide the circuit board 42 on the back side of the auxiliary reflector 41. As a result, the circuit board 42 is prevented from being exposed to the light of the light source unit 30, and durability is improved. In particular, since the light source unit 30 irradiates ultraviolet rays, the circuit board 42 is prevented from being deteriorated by ultraviolet rays.

According to the present embodiment, the light source device 5 includes the light source unit 30 having the mounting base 40 in which each of the LED units 20 is mounted in parallel to the mounting surface 40A1, and the back surface 40B of the mounting base 40 opposite to the mounting surface 40A1. A cooling unit 22 provided, the mounting surface 40A1 of the mounting base 40 is recessed corresponding to the arc Q, and the both ends of the back surface 40B have a thickness that is centered on the recess of the mounting surface 40A1. The shape was recessed to be equal.
As a result, the distance from each LED unit 20 to the cooling unit 22 with the mounting base 40 interposed therebetween is made equal and can be cooled uniformly.

  The above-described embodiments are merely illustrative of one embodiment of the present invention, and can be arbitrarily modified and applied without departing from the spirit of the present invention.

For example, although the ultraviolet LED 51A is illustrated as an example of the light emitting element in the above-described embodiment, the present invention is not limited to this, and any type of light emitting element including a wavelength can be used.
For example, in the above-described embodiment, each light source unit 30 is provided with the water conduit 61 individually. However, the present invention is not limited to this, and the water conduit 61 connected may be integrally formed.
Moreover, although the case where the cooling mechanism 70 is water cooling was illustrated, it is not restricted to this, Liquid refrigerants other than water, or a gas refrigerant may be sufficient.
In addition, for example, the configuration in which the light source unit 30 includes the LED units 20 for four columns is illustrated, but the number of columns of the LED units 20 is not limited to this, and the number of columns of the LED unit 20 may be any number of two or more according to the required light amount Can be adopted.

In the above-described embodiment, the irradiator 1 or the light source device 5 may be provided with a configuration that prevents dew condensation accompanying cooling of the cooling mechanism 70.
More specifically, depending on the humidity and temperature of the surrounding environment, the temperature of the cooling water, and the like, condensation may occur in the water cooling jacket 60 as the cooling mechanism 70 is cooled, and the water cooling jacket 60 may be corroded or rusted. Further, in the light source device 5, the LED unit 20 is disposed immediately below the water cooling jacket 60 (the lower side in the vertical direction), so that condensation of the water cooling jacket 60 is transmitted to the LED unit 20, and the LED unit 20. (Particularly, the wiring bus bar 53 disposed on the outer surface 52A of the trough reflector 52) may be corroded or rusted.
Therefore, a sensor for detecting the occurrence of condensation on the surface of the water cooling jacket 60 is provided in the cooling mechanism 70, and when the occurrence of condensation is detected, the amount of cooling water circulating through the cooling mechanism 70 is reduced and / or the water temperature is reduced. It is preferable to raise it and suppress dew condensation.
As a sensor for detecting the occurrence of dew condensation, any sensor can be used as long as it is a sensor capable of detecting the adhesion of water drops or frost to the surface of the water cooling jacket 60, for example. For example, an optical sensor that detects a change in light reflectance accompanying the attachment of water droplets or the like on the surface of the water cooling jacket 60, a CCD sensor that detects the attachment of water droplets or the like by image processing, or the like can be used.

DESCRIPTION OF SYMBOLS 1 Irradiator 2 Instrument main body 5 Light source device 13 Conveyance path 15 Case body 20 LED unit (light emitting element unit)
22 Cooling unit 30 Light source unit 33 Electric power bus bar 40 Mounting base 40A1 Mounting surface 41 Auxiliary reflector 42 Circuit board 43 Insulating board 50 Substrate 51 LED package (Linear light source)
52 trough reflector (reflector)
52A Outer side surface 53 Wiring busbar 54 Flat surface portion 55 Base end portion 56 Recessed portion (recessed portion)
60 Water Cooling Jacket 61 Water Channel 68 Water Channel 70 Cooling Mechanism 81 Terminal Base 85 Insulating Sheet 89 Packing 51A UV LED (Light Emitting Element)
F Condensing point K Optical axis Q Arc S Seal label (irradiated object)
W width

Claims (6)

In a light emitting element unit that irradiates linear light, a substrate in which light emitting elements are arranged in a line is provided with a pair of reflecting mirrors sandwiching the arrangement of the light emitting elements.
A bus bar for supplying power to the light emitting element;
A light emitting element unit, wherein a concave portion is provided on an outer surface of the reflecting mirror, and the bus bar is accommodated in the concave portion.   2. The light emitting element unit according to claim 1, wherein a planar portion that avoids interference with a reflecting mirror of another light emitting element unit is provided on a front end side of the outer surface of the reflecting mirror.   3. The light emitting element unit according to claim 1, further comprising an auxiliary reflecting plate that closes end portions of the pair of reflecting mirrors at end portions on both sides of the arrangement of the light emitting elements.   The light emitting element unit according to any one of claims 1 to 3, wherein a circuit board having a lighting circuit for the light emitting element is provided on the back side of the auxiliary reflector. A plurality of light emitting element units according to any one of claims 1 to 4,
A mounting base on which each of the light emitting element units is mounted in parallel to a mounting surface;
A cooling unit provided on the surface opposite to the mounting surface of the mounting base,
A light source device characterized in that a mounting surface of the mounting base is curved in a concave shape, and in accordance with the curvature of the mounting surface, both end portions of the opposite surface are recessed so that the thickness is equal to the central portion. The light source device according to claim 5,
Each of the light emitting element units is arranged side by side so as to collect light at the condensing point along an arc having a predetermined central angle with the predetermined condensing point as the center. An irradiator provided with a conveying surface.

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