JP6224492B2 - Light irradiation device - Google Patents

Description

  The present invention relates to a light irradiation apparatus, and more particularly to an apparatus that irradiates ultraviolet light.

  Ultraviolet light is widely used in the fields of resin curing, sterilization or sterilization treatment in the medical and food fields. In recent years, along with increasing people's interest in food safety and hygiene, the prevention of infections such as O-157 and other bacteria and influenza viruses has been emphasized, and can be effectively sterilized. A device is sought.

  Examples of the light source that emits ultraviolet light include an ultraviolet lamp and an ultraviolet light LED (Light Emitting Diode). For example, there is a sterilization device that sterilizes a fluid flowing through the tubular body using an ultraviolet LED provided outside the tubular body (see Patent Document 1).

JP 2013-158722 A

  When an LED is used for an ultraviolet light irradiation device, it may be deteriorated due to heat generation of the LED.

  This invention is made | formed in view of such a subject, and exists in provision of the light irradiation apparatus which improved reliability.

In order to solve the above-described problems, a light irradiation apparatus according to an aspect of the present invention includes an LED module that emits ultraviolet light, a light source chamber that houses the LED module, and a cooling channel that passes a fluid that cools the LED module. A tubular housing having a first partition wall for partitioning, a processing channel for passing a fluid to be irradiated with ultraviolet light, and a second partition wall for partitioning between the processing channel and the light source chamber . The outer wall of the cooling channel, the outer wall of the light source chamber, the outer wall of the processing channel, the first partition, and the second partition are integrally formed .

  According to this aspect, since the light source chamber in which the LED module is accommodated and the cooling channel through which the fluid for cooling the LED module passes are adjacent to each other with the first partition interposed therebetween, the cooling efficiency of the LED module can be increased. Thereby, deterioration by heat_generation | fever of an LED module can be prevented and the reliability of a light irradiation apparatus can be improved.

  In the light irradiation apparatus of the above aspect, the casing is made of a resin material that has flexibility and transmits ultraviolet light emitted from the LED module. The LED module is mounted on the flexible substrate and the flexible substrate. And a plurality of LEDs.

  In the light irradiation apparatus of the above aspect, the flexible substrate may be a substrate based on a metal including copper (Cu) or aluminum (Al).

  In the light irradiation device of the above aspect, the first partition may have higher thermal conductivity than the housing.

  In the light irradiation device of the above aspect, the first partition may be embedded with a plate-like member containing copper (Cu).

  In the light irradiation apparatus of the above aspect, the housing may further include a second partition wall that partitions between the processing flow path through which the fluid to be irradiated with ultraviolet light passes and the light source chamber. The second partition wall may be formed of a member that transmits ultraviolet light.

  The light irradiation apparatus according to the above aspect may further include a reflection member that is provided inside the light source chamber and reflects the ultraviolet light emitted from the LED to be directed to the processing flow path.

  In the light irradiation apparatus of the above aspect, the second partition may include quartz glass whose surface on the processing flow path side is coated with a resin material that transmits ultraviolet light.

  According to the light irradiation apparatus of the present invention, the LED module can be used while being cooled by the cooling flow path, so that the light irradiation apparatus with improved reliability can be provided.

Fig.1 (a) is an external view which shows the light irradiation apparatus which concerns on 1st Embodiment, FIG.1 (b) is sectional drawing which shows the structure of the light irradiation apparatus which concerns on 1st Embodiment. is there. 2A and 2B are cross-sectional views showing the structure of the light irradiation apparatus according to the first embodiment. It is sectional drawing which shows the light irradiation apparatus deform | transformed so that it might curve. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on the modification 1. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on 2nd Embodiment. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on 2nd Embodiment. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on modification 2-1. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on modification 2-2. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on the modification 2-3. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on modification 2-4. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on modification 2-5. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on 3rd Embodiment. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on 3rd Embodiment. It is an external view which shows typically the LED module comprised helically. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on modification 3-1. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on modification 3-2. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on 4th Embodiment. It is sectional drawing which shows the structure of the light irradiation apparatus which concerns on 4th Embodiment. It is an external view which shows the light irradiation unit which concerns on 5th Embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

(First embodiment)
Fig.1 (a) is an external view which shows the light irradiation apparatus 100 which concerns on 1st Embodiment. FIG.1 (b) is sectional drawing which shows the structure of the light irradiation apparatus 100, and shows the AA line cross section of Fig.1 (a). 2A and 2B are cross-sectional views showing the structure of the light irradiation apparatus 100, showing a cross section taken along the line BB and a cross section taken along the line CC in FIG.

  The light irradiation device 100 includes a partition wall 14 (first partition wall) that partitions an LED module 40 that emits ultraviolet light, a light source chamber 20 that houses the LED module 40, and a cooling flow path 22 through which a fluid that cools the LED module 40 passes. And a tubular casing 10 having a shape). The housing 10 is made of a flexible resin material, and the plurality of LEDs 44 are mounted on the flexible substrate 42. Therefore, as shown in FIG. 3 to be described later, the light irradiation device 100 can be used as a flexible light source that radiates ultraviolet light to the outside in a state where the housing 10 is curved.

  The light irradiation apparatus 100 includes a housing 10 and an LED module 40.

  The casing 10 is a tubular member extending in the longitudinal direction, and as shown in FIGS. 2A and 2B, the casing 10 is a circular tubular member having a circular cross section perpendicular to the longitudinal direction. The housing | casing 10 is comprised with the material which permeate | transmits the ultraviolet light from the LED module 40 accommodated in an inside, and is comprised with the soft material which has flexibility. The casing 10 is made of a resin material having a high ultraviolet light transmittance. For example, a fluororesin such as PFA (tetrafluoroethylene / perfluoroalkyl vinyl ether copolymer) or PTFE (polytetrafluoroethylene), or transparency is used. Silicone resin or the like may be used.

  The housing 10 includes an outer wall 12, a partition wall 14, seal portions 16a and 16b, a first connection portion 24, and a second connection portion 26.

  The outer wall 12 is a cylindrical member extending in the longitudinal direction. The outer wall 12 includes a first outer wall 12 a that partitions the light source chamber 20 together with the partition wall 14, and a second outer wall 12 b that partitions the cooling flow path 22 together with the partition wall 14. The partition wall 14 is a flat plate-like member extending in the longitudinal direction, and partitions the inside of the cylindrical outer wall 12 into a light source chamber 20 and a cooling flow path 22. The outer wall 12 and the partition wall 14 can be integrally molded by, for example, extrusion molding or injection molding.

  The seal portions 16 a and 16 b are members that seal the end portions 10 a and 10 b of the housing 10. The seal portions 16a and 16b are respectively attached to both end portions of the outer wall 12 and the partition wall 14 which are integrally molded, and seal both end portions. The seal portions 16a and 16b are attached to the end portions 10a and 10b of the housing 10 after the LED module 40 is accommodated in the light source chamber 20, for example. The first seal portions 16a and 16b may be detachably attached to both end portions of the housing 10, or may be welded to the outer wall 12 and the partition wall 14 in order to improve sealing performance.

  The first connection portion 24 and the second connection portion 26 are connection ports that serve as inlets or outlets for fluid flowing through the cooling flow path 22. The first connection portion 24 and the second connection portion 26 are provided on the second outer wall 12b and are provided in the vicinity of the end portions 10a and 10b of the housing 10, respectively. The first connection portion 24 and the second connection portion 26 may be provided with a joint structure that allows connection of a hose, piping, or the like leading to a pump (not shown) for allowing fluid to pass therethrough.

  The LED module 40 includes a flexible substrate 42 and a plurality of LEDs 44.

  The LED module 40 is housed inside the light source chamber 20 and configured to irradiate ultraviolet light toward the outside of the housing 10. The LED module 40 is disposed so that the back surface 42 b of the flexible substrate 42 is in contact with the partition wall 14 in order to improve heat dissipation by the flexible substrate 42. Thereby, the surface 42a of the flexible substrate 42 is directed to the first outer wall 12a side, and the ultraviolet light from the LED 44 is irradiated toward the first outer wall 12a. The LED module 40 is electrically connected to an external power source (not shown), and emits ultraviolet light when supplied with power from the external power source. As a modification, the LED module 40 may use a battery provided in the housing 10 as a power source.

  The flexible substrate 42 is an elongated tape-like substrate, and a plurality of LEDs 44 are mounted in a line on the surface 42a. In order to improve the heat dissipation of the LED 44, the flexible substrate 42 is preferably composed of a member having high thermal conductivity. For example, the flexible substrate 42 may be a substrate based on a metal including copper (Cu) or aluminum (Al). desirable. Further, when the flexible substrate 42 is deformed, the flexible substrate 42 is desirably flexible enough to follow the deformation.

  In order to give the flexible substrate 42 such heat dissipation and flexibility, the thickness of the flexible substrate 42 may be about 50 to 600 μm, and preferably about 250 to 500 μm. For example, in the case of the flexible substrate 42 based on aluminum, the base layer has a thickness of about 300 μm, the insulating layer provided on the base layer has a thickness of about 25 μm, and the copper foil serving as a conductive layer provided on the insulating layer has a thickness of about 25 μm. Just do it. By setting it as such a structure, while having moderate flexibility, it can be set as the flexible substrate 42 with high heat dissipation.

  The LED 44 is a UV-LED that emits ultraviolet light, and has a central wavelength or peak wavelength included in the ultraviolet region of about 220 nm to 350 nm. For example, when the light irradiation device 100 is used for sterilization, it is preferable to use a device that emits ultraviolet light around 260 nm, which is a wavelength with high sterilization efficiency. As such an ultraviolet light LED, for example, one using aluminum gallium nitride (AlGaN) is known. In addition, what is necessary is just to select LED which emits the ultraviolet light of the wavelength suitable for a use, when using it for other uses, such as resin hardening. As a modification, an LED that emits visible light or infrared light may be used instead of the UV-LED, or an LED that emits visible light or infrared light may be used in combination with the UV-LED.

  In the present embodiment, the case where the LED module 40 in which 12 LEDs 44 are mounted on one flexible substrate 42 is used is shown. However, the number of the LEDs 44 included in the LED module 40 is not limited to this, and the other It is good also as a number.

  With the above configuration, the light irradiation device 100 irradiates ultraviolet light to the outside by the LED module 40 and radiates heat generated in the LED module 40 by cooling water passing through the cooling flow path 22. Thereby, deterioration of the LED module 40 by heat can be prevented, and the reliability of the light irradiation apparatus 100 can be improved.

  FIG. 3 is a cross-sectional view showing the light irradiation device 100 deformed so as to be curved. Since the housing 10 of the light irradiation device 100 is made of a flexible resin material, the housing 10 can be deformed in a direction intersecting the longitudinal direction. Similarly, since the LED module 40 is composed of a flexible substrate 42 having flexibility, the LED module 40 can be deformed in a direction crossing the longitudinal direction. Therefore, the light irradiation device 100 can be used even in a deformed state so as to be curved.

  For example, when the light irradiation device 100 is used for sterilization treatment in the field of medical treatment or food processing, the light irradiation device depends on the shape of the irradiation target of ultraviolet light, the spatial restriction of the installation location of the light irradiation device 100, or the like. 100 can be deformed. For example, when it is necessary to sterilize by irradiating ultraviolet light to a part constituted by a curved surface included in a part of the production line, the light irradiation device 100 is deformed and installed so as to correspond to the curved surface. Thus, it is possible to effectively irradiate the curved surface with ultraviolet light. In addition, even when the irradiation target of ultraviolet light has a complicated shape, it is not necessary to design the light irradiation device 100 that matches each shape. Can be increased. Thereby, the necessity for individual design can be reduced and manufacturing cost can be held down.

  Moreover, when using the light irradiation apparatus 100 for sterilization processing of the drinking water etc. which are stored in a tank, the shape of the light irradiation apparatus 100 can be changed and installed according to the inner wall shape of a tank. For example, even when the light irradiation device 100 is provided along the inner wall of a cylindrical tank, the light irradiation device 100 can be installed in a curved state in accordance with the curvature of the inner wall of the tank.

  Further, when the light irradiation device 100 is used for skin treatment or the like, the ultraviolet light is more efficiently irradiated to the portion to be irradiated with ultraviolet light by changing the shape of the light irradiation device 100 according to the shape of the portion to be irradiated with ultraviolet light. Can be irradiated. For example, when irradiating ultraviolet light to an arm, a back, or the like, the light irradiation device 100 can be used in a curved shape according to the surface shape of the arm or the back.

(Modification 1)
FIG. 4 is a cross-sectional view showing the structure of the light irradiation apparatus 100 according to the first modification, and shows a cross section corresponding to FIG. The first modification differs from the first embodiment described above in that the housing 10 is not a circular tube but is formed of a square tubular member. In the modification 1, since the housing | casing 10 is a rectangular tube, it can be set as the light irradiation apparatus 100 excellent in flexibility rather than the above-mentioned 1st Embodiment. Moreover, the thickness of the housing 10 (the distance between the first outer wall 12a and the second outer wall 12b) can be reduced by adopting the rectangular tubular shape. Further, since the first outer wall 12a forms a flat surface, it is possible to irradiate the exterior with higher intensity ultraviolet light.

(Second Embodiment)
5 and 6 are cross-sectional views showing the structure of the light irradiation apparatus 200 according to the second embodiment, and FIG. 6 shows a cross section taken along line BB of FIG. The light irradiation apparatus 200 is different from the light irradiation apparatus 100 according to the first embodiment described above in that a processing channel 132 is further provided inside the housing 110. Hereinafter, the difference from the above-described first embodiment will be mainly described.

  The light irradiation device 200 includes an LED module 40 and a housing 110. As shown in FIG. 6, the casing 110 is a tubular member having an elliptical or oval cross section perpendicular to the longitudinal direction. The housing 110 is made of a resin material having flexibility and high ultraviolet light transmittance.

  The housing 110 includes a light source chamber 120 that houses the LED module 40 and a first partition 114 that partitions the cooling channel 122 that passes the fluid that cools the LED module 40, and a processing flow that passes the fluid to be irradiated with ultraviolet light. And a second partition wall 115 that partitions the path 132 and the light source chamber 120. The second partition 115 is made of a member that transmits ultraviolet light, and the ultraviolet light emitted from the LED module 40 passes through the second partition 115 and is irradiated to the processing channel 132. Thereby, the light irradiation apparatus 200 irradiates the fluid passing through the processing flow path 132 with ultraviolet light.

  The housing 110 includes an outer wall 112, a first partition 114, a second partition 115, seal portions 116a and 116b, a first connection portion 124, a second connection portion 126, a third connection portion 134, 4 connecting portions 136.

  The outer wall 112 is a cylindrical member extending in the longitudinal direction. The outer wall 112 includes a first outer wall 112a, a second outer wall 112b, and a third outer wall 112c. The first outer wall 112 a partitions the light source chamber 120 together with the first partition 114 and the second partition 115. The second outer wall 112b partitions the cooling flow path 122 together with the first partition 114. The third outer wall 112 c defines the processing flow path 132 together with the second partition wall 115.

  The first partition 114 and the second partition 115 are flat plate-like members extending in the longitudinal direction, and partition the inside of the cylindrical outer wall 112 into three spaces of a cooling channel 122, a light source chamber 120, and a processing channel 132. The first partition 114 is provided so as to partition between the cooling channel 122 and the light source chamber 120, and the second partition 115 is provided so as to partition between the light source chamber 120 and the processing channel 132. The outer wall 112, the first partition 114, and the second partition 115 are integrally formed by extrusion molding, injection molding, or the like.

  The first connection portion 124 and the second connection portion 126 are connection ports that serve as inlets or outlets of the cooling flow path 122, and are provided in the vicinity of the end portions 110a and 110b of the housing 110 in the second outer wall 112b. The third connection part 134 and the fourth connection part 136 are connection ports that serve as inlets or outlets of the processing flow path 132, and are provided in the vicinity of the ends 110a and 110b of the housing 110 in the third outer wall 112c. The seal portions 116 a and 116 b are provided at the end portions 110 a and 110 b of the housing 110 and seal both end portions of the housing 110.

  The LED module 40 is accommodated in the light source chamber 120 and is disposed so that the back surface 42 b of the flexible substrate 42 is in contact with the first partition 114. Thereby, the surface 42a of the flexible substrate 42 is directed to the second partition 115 side, and the ultraviolet light from the LED 44 is irradiated toward the processing flow path 132.

  With the above configuration, the light irradiation device 200 irradiates the fluid passing through the processing flow path 132 with ultraviolet light by the LED module 40 and radiates the heat generated in the LED module 40 by the cooling water passing through the cooling flow path 122. Thereby, deterioration of the LED module 40 by heat can be prevented, and the reliability of the light irradiation apparatus 200 can be improved. Moreover, since the housing | casing 110 and the LED module 40 have flexibility, the light irradiation apparatus 200 can be deform | transformed and used so that it may curve.

  In the modified example, the second partition 115 is made of a resin material that transmits ultraviolet light, and the members other than the second partition 115 constituting the housing 110 such as the outer wall 112 and the first partition 114 transmit ultraviolet light. You may comprise with the material which does not. Thereby, it can prevent that ultraviolet light leaks outside the housing | casing 110, and can improve the safety | security at the time of using the light irradiation apparatus 200. FIG. In this case, the members other than the second partition 115 are preferably made of a material that is not easily deteriorated by the ultraviolet light emitted from the LED module 40. Thereby, durability of the light irradiation apparatus 200 can be improved.

(Modification 2-1)
FIG. 7 is a cross-sectional view showing the structure of the light irradiation apparatus 200 according to Modification 2-1, and shows a cross section corresponding to FIG. In the modified example 2-1, the flow path tube wall 138 that partitions the processing flow path 132 is provided so that the water flow cross-sectional area of the processing flow path 132 is larger than that of the light source chamber 120 and the cooling flow path 122. Different from the second embodiment described above. Hereinafter, the difference from the above-described second embodiment will be mainly described.

  The housing 110 includes an outer wall 112, a first partition 114, a second partition 115, and a flow channel wall 138. The channel tube wall 138 is a cylindrical member having a circular cross section perpendicular to the longitudinal direction. A first outer wall 112 a extends from the outer peripheral surface of the channel tube wall 138, and the light source chamber 120 is partitioned by the channel tube wall 138, the first outer wall 112 a and the first partition wall 114. A part of the channel tube wall 138 can also be referred to as a second partition wall 115 that partitions the light source chamber 120. The outer wall 112 and the channel tube wall 138 may be molded integrally, or the outer wall 112 and the channel tube wall 138 may be molded separately and then joined together.

  In the modified example 2-1, the processing flow path 132 having a larger water cross-sectional area than that of the above-described second embodiment is provided. If the flow rate of the fluid passing through the processing flow path 132 is the same, the flow velocity of the fluid passing through the processing flow path 132 can be made slower than that in the second embodiment, and the ultraviolet rays irradiated per unit volume of the fluid The amount of energy can be increased. Further, if the flow velocity of the fluid passing through the processing channel 132 is the same, the flow rate of the fluid passing through the processing channel 132 can be increased as compared with the second embodiment, and ultraviolet light can be irradiated. The flow rate per unit time can be increased. Thus, in the light irradiation apparatus 200 which concerns on the modification 2-1, the processing capability of ultraviolet light irradiation can be improved by enlarging the water flow cross-sectional area of the process flow path 132.

(Modification 2-2)
FIG. 8 is a cross-sectional view illustrating the structure of the light irradiation apparatus 200 according to Modification 2-2. Modification 2-2 differs from Modification 2-1 described above in that the second partition 115 is provided with a transmission window 140 having a high ultraviolet light transmittance.

  The transmission window 140 is provided so as to constitute a part of the second partition 115 and is made of quartz glass having a higher ultraviolet light transmittance than a fluororesin or a silicone resin. At least the main surface 140a on the processing flow path 132 side of the transmission window 140 is covered with a protective layer 142 made of a resin material. For example, when the flow path tube wall 138 is resin-molded, the flow path tube wall 138 having the transmission window 140 is integrally formed by arranging the transmission window 140 at a position where the second partition wall 115 is formed. it can. At this time, the protective layer 142 that covers the main surface 140a of the transmission window 140 can also be formed of the resin material that forms the flow path tube wall 138.

  In Modification 2-2, since the second partition 115 is provided with the transmission window 140 having a high ultraviolet light transmittance, the intensity of the ultraviolet light irradiated to the fluid passing through the processing channel 132 can be increased. Further, since the main surface 140a of the transmission window 140 is covered with the protective layer 142, the transmission window 140 can be prevented from being broken or chipped and glass fragments being mixed into the fluid passing through the processing flow path 132. .

  Note that the transmission window 140 according to this modification may be provided in the second partition 115 according to the second embodiment described above. In this case, the same effect can be obtained.

(Modification 2-3)
FIG. 9 is a cross-sectional view illustrating the structure of the light irradiation apparatus 200 according to Modification 2-3. Modification 2-3 is different from Modification 2-1 described above in that a reflector 150 is provided inside the light source chamber 120.

  The reflection plate 150 is provided inside the light source chamber 120 along the first outer wall 112a. The reflection plate 150 has a function of reflecting the light directed toward the first outer wall 112 a out of the ultraviolet light emitted from the LED module 40 and directing it toward the second partition 115. The reflection plate 150 is made of, for example, aluminum (Al) whose reflection surface has a high ultraviolet light reflectance. The reflector 150 may be made of an aluminum plate. By providing the reflecting plate 150, the amount of ultraviolet light that passes through the second partition 115 and is irradiated onto the processing flow path 132 can be increased, and the irradiation efficiency can be increased. In addition, the amount of ultraviolet light irradiated on the first outer wall 112a can be reduced, and the outer wall 112 can be prevented from being deteriorated by irradiation with ultraviolet light.

  Instead of providing the reflecting plate 150, the flexible substrate 42 may be formed in a U-shaped cross section so that the flexible substrate 42 extends along the first outer wall 112a. At this time, it is desirable that a portion of the flexible substrate 42 extending along the first outer wall 112a has its surface 42a made of aluminum so that the ultraviolet light reflectance is increased. Even in this case, the same effect as that provided by the reflecting plate 150 can be obtained. Instead of providing the reflecting plate 150, a reflecting member may be formed by vapor-depositing aluminum on the inner surface of the light source chamber 120 at a location corresponding to the first outer wall 112a.

  It should be noted that the reflecting plate 150 and the reflecting member according to this modification may be provided inside the light source chamber 120 according to the above-described second embodiment. In this case, the same effect can be obtained.

(Modification 2-4)
FIG. 10 is a cross-sectional view illustrating the structure of the light irradiation apparatus 200 according to Modification 2-4. Modification 2-4 differs from Modification 2-1 described above in that a heat radiating plate 160 is provided so that the thermal conductivity of the first partition 114 is increased.

  The heat radiating plate 160 is a member having a higher thermal conductivity than the resin material constituting the housing 110, and is, for example, a plate-like member containing copper (Cu). The heat sink 160 is provided so as to be embedded in the first partition 114. For example, when the housing 110 is molded with resin, the first partition 114 including the heat sink 160 can be molded integrally by providing the heat sink 160 in advance at a location where the first partition 114 is formed. it can. By providing the heat sink 160, the first partition wall 114 has a higher thermal conductivity than other portions of the housing 110. By increasing the thermal conductivity of the first partition 114, the heat dissipation of the LED module 40 can be increased, and the light irradiation device 200 with higher reliability can be obtained.

  In order to increase the thermal conductivity of the first partition 114, instead of providing the heat radiating plate 160, a powder having a higher thermal conductivity than the resin may be mixed into the resin constituting the first partition 114.

  Moreover, the heat sink 160 according to the present modification may be provided in the first partition 114 according to the first and second embodiments described above. In this case, the same effect can be obtained.

(Modification 2-5)
FIG. 11 is a cross-sectional view illustrating the structure of the light irradiation apparatus 200 according to Modification 2-5. Modification 2-5 is different from Modification 2-4 described above in that fin 160a protruding toward cooling flow path 122 is provided on heat dissipation plate 160.

  By making the fins 160a directly contact the fluid passing through the cooling flow path 122, the heat dissipation of the LED module 40 can be further enhanced. In addition, the structure which improves the heat dissipation of the heat sink 160 is not restricted to the aspect which provides the fin 160a, The heat dissipation of the LED module 40 is improved by increasing the heat dissipation area by providing unevenness on the surface of the heat sink 160. Also good. In this case, instead of passing the cooling water through the cooling flow path 122, the heat radiating plate 160 may be air-cooled by flowing air.

(Third embodiment)
12 and 13 are cross-sectional views showing the structure of the light irradiation apparatus 300 according to the third embodiment, and FIG. 13 shows a cross section taken along line BB of FIG. In the light irradiation apparatus 300, the first partition wall 214 that partitions the cooling channel 222 and the light source chamber 220 and the second partition wall 215 that partitions the light source chamber 220 and the processing channel 232 have a cylindrical shape extending in the longitudinal direction. This is different from the light irradiation apparatus 200 according to the second embodiment described above. Moreover, the light irradiation apparatus 300 has the LED module 40 provided in a spiral shape along the inner peripheral surface of the cylindrical first partition wall 214. Hereinafter, the difference from the above-described second embodiment will be mainly described.

  The housing 210 includes an outer wall 212, a first partition 214, a second partition 215, a first connection portion 224, a second connection portion 226, a third connection portion 234, and a fourth connection portion 236. Have.

  The outer wall 212, the first partition wall 214, and the second partition wall 215 all have a cylindrical shape extending in the longitudinal direction, and are arranged so as to have a common central axis. A second partition 215 is provided near the central axis, a first partition 214 is provided outside the second partition 215, and an outer wall 212 is provided outside the first partition 214. As a result, the processing channel 232 is partitioned inside the second partition 215, the light source chamber 220 is partitioned between the second partition 215 and the first partition 214, and the cooling channel is interposed between the first partition 214 and the outer wall 212. 222 is defined.

  The outer wall 212 and the first partition wall 214 are made of a resin material or a metal material. The second partition 215 is made of quartz glass having a high ultraviolet light transmittance, fluororesin, or the like. The second partition wall 215 may include a transmission window 240 made of quartz glass and a protective layer 242 made of PFA. In this case, the protective layer 242 is provided so as to cover the surface 240a of the transmission window 240 on the processing channel 232 side.

  The outer wall 212 is provided with a first connection portion 224 and a second connection portion 226 that serve as an inlet or an outlet of the cooling flow path 222. Further, both end portions 210 a and 210 b of the casing 210 are provided with a third connection portion 234 and a fourth connection portion 236 that serve as inlets or outlets of the processing flow path 232. In addition, the 3rd connection part 234 and the 4th connection part 236 may have a ferrule joint structure as illustrated.

  FIG. 14 is an external view schematically showing the LED module 40 configured in a spiral shape. The LED module 40 is formed in a spiral shape utilizing the characteristics of the flexible substrate 42 having flexibility, and is disposed in the light source chamber 220 along the inner peripheral surface of the cylindrical first partition wall 214. By configuring the LED module 40 in a spiral shape, the adhesion between the LED module 40 and the first partition wall 214 can be improved, and the heat dissipation can be improved. In addition, the mounting density of the LEDs 44 arranged outside the processing channel 232 can be increased, and the intensity of ultraviolet light irradiated to the processing channel 232 can be increased.

  In the modification, the LED module 40 may be provided in the light source chamber 220 in a ring shape instead of a spiral shape. In this case, the same effect can be obtained. As another modification, the surface 42a of the flexible substrate 42 may be made of aluminum. Thereby, the light which goes to the flexible substrate 42 among the ultraviolet light which LED44 emits can be reflected, and can be made to go to the process flow path 232, and the amount of the ultraviolet light irradiated to the process flow path 232 is increased. Can do.

(Modification 3-1)
FIG. 15 is a cross-sectional view illustrating the structure of the light irradiation apparatus 300 according to Modification 3-1. Modification 3-1 differs from the above-described third embodiment in that the cooling flow path 222 is provided on the inner side and the processing flow path 232 is provided on the outer side. Hereinafter, the difference from the third embodiment will be mainly described.

  All of the outer wall 212, the first partition 214, and the second partition 215 have a cylindrical shape extending in the longitudinal direction, and are arranged so as to have a common central axis. A first partition 214 is provided near the central axis, a second partition 215 is provided outside the first partition 214, and an outer wall 212 is provided outside the second partition 215. As a result, the cooling flow path 222 is partitioned inside the first partition wall 214, the light source chamber 220 is partitioned between the first partition wall 214 and the second partition wall 215, and the processing channel is interposed between the second partition wall 215 and the outer wall 212. 232 is partitioned.

  The outer wall 212 is provided with a third connection portion 234 and a fourth connection portion 236 that serve as an inlet or an outlet of the processing channel 232. In addition, a first connection portion 224 and a second connection portion 226 that serve as inlets or outlets of the cooling flow path 222 are provided at both end portions 210 a and 210 b of the housing 210.

  The outer wall 212 and the first partition wall 214 are made of a resin material or a metal material. The second partition 215 is made of quartz glass having a high ultraviolet light transmittance, fluororesin, or the like. The second partition 215 has a transmission window 240 made of quartz glass and a protective layer 242 made of PFA, and the protective layer 242 covers the surface 240a of the transmission window 240 on the processing flow path 232 side. Provided.

  The LED module 40 is provided spirally or circumferentially along the outer peripheral surface of the first partition wall 214. Thereby, the adhesiveness of the LED module 40 and the 1st partition 214 can be improved, and heat dissipation can be improved. Further, the mounting density of the LEDs 44 arranged inside the processing channel 232 can be increased, and the intensity of ultraviolet light irradiated to the processing channel 232 can be increased.

(Modification 3-2)
FIG. 16 is a cross-sectional view illustrating the structure of the light irradiation apparatus 300 according to Modification 3-2. In the modified example 3-2, the light irradiation apparatus 300 according to the modified example 3-1 described above in that the outer wall 212 is not provided outside the second partition wall 215 and the processing channel 232 is not provided inside the housing 210. And different. Therefore, the ultraviolet light emitted from the LED module 40 according to the modified example 3-2 passes through the second partition 215 and is irradiated to the outside of the housing 210.

  Since the light irradiation apparatus 300 according to the modified example 3-2 has a straight tube shape like a general ultraviolet lamp, it can be used as an alternative to the existing ultraviolet lamp. For example, by using the light irradiation device 300 like an existing germicidal lamp, it can be used for the purpose of sterilizing the surrounding air with ultraviolet light. In the modified example 3-2 as well, as in the modified example 3-1, the heat dissipation of the LED module 40 is increased, and the mounting density of the LEDs 44 is increased and the intensity of ultraviolet light irradiated to the outside of the casing 210 is increased. Can be increased.

(Fourth embodiment)
17 and 18 are cross-sectional views showing the structure of the light irradiation apparatus 400 according to the fourth embodiment, and FIG. 18 shows a cross section taken along line AA of FIG. The light irradiation device 400 is different from the above-described first embodiment in that the housing 310 has a ring shape. Hereinafter, the difference from the first embodiment will be mainly described.

  The light irradiation device 400 includes a housing 310 and an LED module 40. The housing 310 includes an outer wall 312, a partition wall 314 (also referred to as a first partition wall), a seal portion 316, a first connection portion 324, and a second connection portion 326.

  The casing 310 is a member in which a circular tubular member having a circular cross section is formed in a ring shape, and has a donut shape. Similarly, the partition 314 is also configured in a ring shape. A light source chamber 320 is provided inside the partition wall 314, and a cooling channel 322 is provided outside the partition wall 314. The outer wall 312 is a member configured in a ring shape by connecting both ends of a cylindrical member. The outer wall 312 includes a first outer wall 312 a that partitions the light source chamber 320 together with the partition wall 314, and a second outer wall 312 b that partitions the cooling flow path 322 together with the partition wall 314.

  The second outer wall 312b is provided with a first connection portion 324 and a second connection portion 326 that serve as an inlet or an outlet of the cooling channel 322. A seal portion 316 is provided between the first connection portion 324 and the second connection portion 326. For this reason, the cooling water entering the cooling flow path 322 from the first connection portion 324 goes around the cooling flow path 322 and exits from the second connection portion 326.

  The LED module 40 is provided in a ring shape along the inner peripheral surface of the partition wall 314. The flexible substrate 42 is disposed such that the back surface 42b thereof is in contact with the partition wall 314, and the front surface 42a of the flexible substrate 42 is directed toward the first outer wall 312a. For this reason, the ultraviolet light from the LED 44 is irradiated toward the first outer wall 12a, and at least a part of the ultraviolet light is irradiated toward the center O of the ring-shaped casing 310.

  With the above configuration, the light irradiation device 400 emits ultraviolet light toward the center O of the housing 310. Therefore, by arranging the light irradiation device 400 so as to surround the object to be irradiated with ultraviolet light, the object inside the light irradiation device 400 can be irradiated with high-intensity ultraviolet light. For example, by providing the light irradiation device 400 around the tip of a nozzle used in a food production line or the like, the nozzle tip can be used for sterilization.

  In the modification, the surface 42a of the flexible substrate 42 may be made of aluminum. Thereby, the light which goes to the flexible substrate 42 among the ultraviolet light which LED44 emits can be reflected, and an ultraviolet light with high intensity | strength can be irradiated with the object inside the light irradiation apparatus 400. FIG.

(Fifth embodiment)
FIG. 19 is an external view showing a light irradiation unit 500 according to the fifth embodiment. The light irradiation unit 500 is a unit in which the light irradiation apparatuses 100a to 100e (hereinafter also referred to as the light irradiation apparatus 100) according to the first embodiment are arranged in a plurality of arrays. Thus, by arranging the plurality of light irradiation devices 100 in an array, it is possible to provide a light irradiation unit 500 that can irradiate ultraviolet light over a wider range. Moreover, since each light irradiation apparatus 100 has flexibility, according to the installation location of the light irradiation unit 500, you may deform | transform the light irradiation apparatuses 100a-100e into a respectively different shape. Thereby, it can be set as the flexible light irradiation unit 500. FIG.

  In the light irradiation unit 500, the first connection portions 24a to 24e and the second connection portions 26a to 26e are connected to each other so that the cooling water is distributed to the respective cooling channels of the light irradiation devices 100a to 100e. Also good. For example, the light irradiation devices 100a to 100e may be connected in series or may be connected in parallel so that the cooling water sequentially flows from the light irradiation device 100a toward the light irradiation device 100e.

  The present invention is not limited to the above-described embodiments, and various modifications such as design changes can be added based on the knowledge of those skilled in the art. The form can also be included in the scope of the present invention. In addition, various inventions may be formed by appropriately combining a plurality of components disclosed in the above embodiments, or some components may be deleted from all the components shown in the above embodiments. good. Furthermore, it is possible to appropriately combine the constituent elements over a plurality of embodiments.

  DESCRIPTION OF SYMBOLS 10 ... Housing | casing, 14 ... Partition (1st partition), 20 ... Light source chamber, 22 ... Cooling flow path, 40 ... LED module, 42 ... Flexible substrate, 42a ... Surface, 44 ... LED, 100 ... Light irradiation apparatus, 110 DESCRIPTION OF SYMBOLS ... Housing | casing 114 ... 1st partition, 115 ... 2nd partition, 120 ... Light source chamber, 122 ... Cooling flow path, 132 ... Processing flow path, 200 ... Light irradiation apparatus, 210 ... Housing, 214 ... 1st partition, 215: Second partition, 220: Light source chamber, 222: Cooling channel, 232: Processing channel, 300: Light irradiation device, 310: Housing, 314: Partition, 320: Light source chamber, 322: Cooling channel, 400 ... light irradiation device.

Claims (13)

An LED (Light Emitting Diode) module that emits ultraviolet light;
A light source chamber for housing the LED module; a first partition partitioning a cooling channel for passing a fluid for cooling the LED module; a processing channel for passing a fluid to be irradiated with the ultraviolet light; and the processing. A tubular housing having a second partition partitioning between the flow path and the light source chamber ;
Bei to give a,
Wherein the outer wall of the cooling channel, and an outer wall of the light source chamber, the outer wall of the processing channel, said first partition wall, and the second partition wall, the light irradiation characterized that you have been integrally molded apparatus. The casing is made of a resin material that has flexibility and transmits ultraviolet light emitted from the LED module.
The said LED module has a flexible substrate and several LED mounted on the said flexible substrate, The light irradiation apparatus of Claim 1 characterized by the above-mentioned.   The light irradiation apparatus according to claim 2, wherein the flexible substrate is a substrate based on a metal including copper (Cu) or aluminum (Al).   The light irradiation apparatus according to claim 1, wherein the first partition wall has a higher thermal conductivity than the housing. The first partition wall, the light irradiation apparatus according to claim 4, characterized in that copper (Cu) plate-like member including a is embedded. Before Stories second partition, the light irradiation apparatus according to claim 1, any one of 5, characterized in that it is composed of a member which transmits the ultraviolet light.   The light irradiation apparatus according to claim 6, wherein the second partition wall includes quartz glass whose surface on the processing flow path side is covered with a resin material that transmits the ultraviolet light.   The light irradiation apparatus according to claim 6, further comprising a reflection member provided inside the light source chamber and configured to reflect the ultraviolet light emitted from the LED and direct the ultraviolet light toward the processing flow path.   The light irradiation apparatus according to claim 1, wherein the first partition has a flat plate shape extending in a longitudinal direction. The first partition has a cylindrical shape extending in the longitudinal direction,
The light source chamber is provided outside the first partition;
The cooling flow path is provided inside the first partition;
The said LED module has the board | substrate provided circumferentially or spirally along the outer peripheral surface of the said 1st partition, and several LED mounted on the said board | substrate from Claim 1 characterized by the above-mentioned. The light irradiation apparatus as described in any one of 8. The first partition and the second partition have a cylindrical shape extending in a longitudinal direction,
The processing flow path is provided inside the second partition wall,
The light source chamber is provided between the first partition and the second partition;
The cooling flow path is provided outside the first partition;
The LED module includes a substrate provided in a circumferential shape or a spiral shape along an inner peripheral surface of the first partition wall, and a plurality of LEDs mounted on the substrate. The light irradiation apparatus as described in any one of 1-8. The housing and the first partition have a ring shape,
The light source chamber is provided inside the first partition;
The light irradiation apparatus according to claim 1, wherein the cooling flow path is provided outside the first partition wall.   The LED module has a flexible substrate and a plurality of LEDs mounted on the flexible substrate,
  The flexible substrate has a U-shaped cross section and includes a portion extending along the outer wall of the light source chamber,
  The light irradiation apparatus according to claim 1, wherein the surface of the portion extending along the outer wall of the light source chamber is made of aluminum.

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