JP6208563B2 - UV irradiation equipment - Google Patents

Description

  The present invention relates to an ultraviolet irradiation apparatus, and more particularly to an ultraviolet irradiation apparatus that can irradiate light having a wide wavelength range of a wavelength profile and that can configure and irradiate light having various wavelength profiles.

  Conventionally, ultraviolet rays emitted from high-pressure mercury lamps and light-emitting diodes have been used as means for sterilizing and purifying water. The principle of water sterilization and purification by ultraviolet rays is as follows. That is, nucleic acids (DNA or RNA) that control genetic information exist in cells of all living organisms including bacteria, but when these cells are irradiated with ultraviolet rays, the photons of the ultraviolet rays are absorbed by the nucleic acids in the cells. The genetic code is destroyed, the gene cannot be transcribed correctly and die.

  Until now, various water sterilizers and purifiers based on these sterilization principles have been proposed. For example, in Patent Document 1, in a water purification system that purifies raw water using a reverse osmosis (Reverse Osmosis, RO) membrane and stores it in a water purification tank, an ultraviolet irradiation lamp is disposed in the water purification tank, The sterilization lamp is turned on until a predetermined upper limit amount of purified water is stored, and is turned off when the upper limit amount of purified water is stored. An ultraviolet water purifier that performs efficiently is described.

  Moreover, in patent document 2, while forming the notch water-flowing part which lets water flow from an upstream side to a downstream side in the opening-and-closing valve provided in the downstream of the sterilization water-permeable part, it is orthogonal to this notch water-flowing part. A drainage valve of a water conduit having an ultraviolet irradiation lamp so that ultraviolet rays of the sterilization water passing portion are irradiated to the downstream pipe line through the transparent body of the open / close valve by fitting the UV transparent transparent body in a liquid-tight manner. Describes an ultraviolet irradiation device in which the sterilizing power of the irradiation lamp acts on the downstream pipe line of the bulb.

Japanese Patent No. 5202286 Japanese Patent No. 4266241

  By the way, when disinfecting certain bacteria contained in water, it may be unclear what wavelength spectrum or emission intensity is optimal. In such a case, it is necessary to verify the bactericidal effect over a wide wavelength range and emission intensity.

However, since the wavelength range of the wavelength spectrum of the light emitting diode is narrow, in order to verify the bactericidal effect over a wide range of wavelength range and emission intensity, a number of light emitting diodes having various peak wavelengths and emission intensity are prepared and It is necessary to turn on the diodes one by one to verify the bactericidal effect of the emitted ultraviolet light, which is extremely inefficient.
SUMMARY OF THE INVENTION An object of the present invention is to provide an ultraviolet irradiation apparatus that can irradiate light having a wide wavelength range of a wavelength profile and can configure light having various wavelength profiles.

  The inventor has intensively studied how to solve the above problems. As described above, although the wavelength range of the wavelength spectrum of the light-emitting diode is narrow, the method of irradiating light having a wide wavelength spectrum using such a light-emitting diode has been intensively studied. As a result, light emitting diodes having different peak wavelengths are alternately arranged in one dimension, and a part of the wavelength spectrum of light emitted from these light emitting diodes is overlapped to correspond to the wavelength between the peak wavelengths of the two light emitting diodes. It has been found that improving the intensity of light is effective.

  Furthermore, as a result of diligent research on ways to construct and irradiate light having various wavelength profiles by combining light emitting diodes having various peak wavelengths and light emission intensities, a plurality of convex portions are one-dimensionally formed on the support member. Prepare a pair of light emitting members that are arranged side by side and have a light emitting diode on each convex portion, and fit the convex portion of one of the light emitting members and the concave portion between the convex portions of the other light emitting member The inventors have further found that it is effective to construct an ultraviolet irradiation device, and have completed the present invention.

That is, the gist of the present invention is as follows.
(1) A plurality of convex portions are arranged one-dimensionally on the support member, and each light-emitting diode is provided on each convex portion. The convex portion of any one of the light-emitting members, The light emitting diode has a wavelength of emitted light that is different between one of the light emitting members and the other of the light emitting member, and has a wavelength spectrum of emitted light. An ultraviolet irradiation device characterized in that a part thereof overlaps and is arranged alternately in one dimension.

(2) The ultraviolet irradiation device according to (1), wherein one of the light emitting members and the other can be attached and detached.

(3) The ultraviolet irradiation device according to (1) or (2), wherein a light emitting member including a light emitting diode having a shorter emitted light wavelength has a heat radiating means.

(4) The support member is a cylindrical body, the plurality of convex portions protrude in the axial direction of the cylindrical body on one end surface of the cylindrical body, and the plurality of convex portions are circumferential directions of the cylindrical body. The ultraviolet irradiation device according to any one of (1) to (3), which is arranged side by side.

(5) The ultraviolet irradiation device according to (4), wherein the light emitting diode disposed on one side of the light emitting member is disposed to face the light emitting diode disposed on the other side of the light emitting member.

  According to the present invention, the light emitting diodes having different peak wavelengths are alternately arranged one-dimensionally, and a part of the wavelength spectrum of the light emitted from the light emitting diodes is configured to overlap. The intensity of light corresponding to the wavelength is improved, and light having a wide wavelength range in the wavelength profile can be irradiated.

  In addition, a plurality of convex portions are arranged in a one-dimensional manner on the support member, and a pair of light emitting members is provided, each having a light emitting diode on each convex portion, and the convex portion of one of the light emitting members and the other Since the ultraviolet irradiation device is configured by fitting the concave portions between the convex portions of the light emitting member, light having various wavelength profiles can be configured and irradiated.

It is a figure which shows an example of the ultraviolet irradiation device which concerns on this invention. It is an exploded view of the ultraviolet irradiation device shown in FIG. It is a figure explaining a mode that the intensity | strength of the light which has a wavelength between two peak wavelengths improves with the ultraviolet irradiation device which concerns on this invention. It is a perspective view of another example of the ultraviolet irradiation device concerning the present invention. It is an exploded view of the ultraviolet irradiation device shown in FIG. It is a figure which shows a mode that the fluid of sterilization object is sterilized using the ultraviolet irradiation device shown in FIG. It is a figure which shows a mode that the fluid to be sterilized is sterilized using the ultraviolet irradiation device which has arrange | positioned the light emitting diode in the outer surface of the cylindrical body. It is a figure which shows a mode that the fluid to be disinfected is sterilized combining the ultraviolet irradiation device which has arrange | positioned the light emitting diode on the outer surface of a cylindrical body, and the ultraviolet irradiation device which has arrange | positioned the light emitting diode on the inner surface of a cylindrical body. FIG. 5 is a diagram illustrating a preferred arrangement of light emitting diodes for efficiently overlapping light wavelength profiles in the ultraviolet irradiation device shown in FIG. 4.

  Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows an example of an ultraviolet irradiation device according to the present invention. The ultraviolet irradiation device 1 shown in this figure is composed of a pair of light emitting members 10 having a planar shape, and each of the light emitting members 10 has a plurality of convex portions 12 on a support member 11 in a one-dimensional manner as shown in FIG. A light emitting diode 13 is provided on each convex portion 12. And the ultraviolet irradiation device 1 is the recessed part 14 (14B) between the convex part 12 (12A) of any one light emitting member 10 of the light emitting member 10, and the convex part 12 (12B) of any other light emitting member 10. The light emitting diode 13 is configured such that at least one of the light emitting members 10 (for example, 13A) and the other (for example, 13B) have different radiated light wavelengths and are arranged in one dimension. .

  As mentioned above, when sterilizing certain bacteria, if it is unclear what wavelength spectrum or emission intensity is optimal, a large number of light emitting diodes having various peak wavelengths and emission intensity are prepared, and each light emission It is necessary to turn on the diodes one by one and irradiate the processing target with light, and to verify the relationship between the sterilization effect and the peak wavelength and emission intensity of the irradiation light.

However, the wavelength range of the wavelength spectrum of the light emitting diode is narrow. Specifically, as shown in FIGS. 3 (a) and 3 (b), the half width of the wavelength spectrum of a light emitting diode having peak wavelengths of 265 nm and 280 nm is at most about 10 nm, which is intermediate between the two peak wavelengths. The emission intensity at 274 nm, which is the wavelength, is 1.356 × 10 ⁻² (W / nm) in the wavelength profile where the peak wavelength shown in FIG. 3A is 265 nm, which is shown in FIG. In the wavelength profile where the peak wavelength is 280 nm, it is 6.632 × 10 ⁻³ (W / nm).

However, when these two types of light emitting diodes having different peak wavelengths are alternately arranged one-dimensionally and a part of the wavelength spectrum of light emitted from these light emitting diodes is overlapped, the wavelength between the two peak wavelengths is obtained. Corresponding light intensity is improved, and light having a wide wavelength range can be irradiated. That is, as shown in FIG. 3C, light having a wavelength profile obtained by overlapping the wavelength profiles shown in FIGS. 3A and 3B can be irradiated. In this case, the emission intensity at a wavelength of 274 nm is 2.019 × 10 ⁻² (W / nm), and the emission intensity is about 1.5 times that in the case of irradiating a light emitting diode having a peak wavelength of 265 nm alone. In addition, as shown in FIG. 3C, it is possible to irradiate light having a wide wavelength range of the wavelength profile.

  In the present invention, “the light emitting diodes are arranged one-dimensionally” means that each light emitting diode 13 is arranged on a straight line or a curve having no inflection point on the two light emitting members 10 fitted. Refers to the state of being.

  In addition, as described above, two types of light emitting diodes having different peak wavelengths are alternately arranged one-dimensionally, and a part of the wavelength spectrum of the light emitted from these light emitting diodes is overlapped so that the wavelength range of the wavelength profile When the light emitting diode B has a configuration in which two light emitting diodes A and B having different peak wavelengths are provided on the same support member when irradiating a wide light, the light emitting diode C has a different peak wavelength. When it is desired to change to the light-emitting diode, it is necessary to replace the light-emitting diode B with the light-emitting diode C, which is a very complicated operation.

  The present inventor has conducted intensive studies on the way in which light having various wavelength profiles can be formed and combined without combining such light-emitting diodes having different peak wavelengths without such a complicated operation. As described above, a plurality of convex portions 12 are arranged one-dimensionally on the support member 11, and a pair of light emitting members 10 including light emitting diodes 13 is prepared on each convex portion 12. The portion 12 (for example, 12A) and the concave portion 14 (for example, 14B) between the convex portions 12 (for example, 12B) of the other light emitting member 10 are fitted to each other, and one of the light emitting members 10 and the other It has been found that it is effective to adopt a detachable configuration.

  That is, if the light emitting member 10 having the configuration shown in FIG. 2 is prepared in advance for various light emitting diodes 13 having different peak wavelengths, they can be freely combined to form light having various wavelength profiles. Thus, it is possible to easily configure the irradiation apparatus 1 that can perform irradiation. In addition, the short wavelength light emitting diode 13 used for sterilization generates more heat than the existing visible light emitting diode, and its useful life is short. In this regard, in the ultraviolet irradiation device 1 according to the present invention, when the life of the light emitting diode 13 having a certain peak wavelength comes to an end, only the light emitting member 10 provided with the light emitting diode 13 needs to be replaced. Hereinafter, each structure of the ultraviolet irradiation device 1 will be described.

  The support member 11 is a member constituting the main body of the ultraviolet irradiation device 1. As a material constituting the support member 11 (and the convex portion 12), aluminum, copper, stainless steel, engineering plastic, or the like can be used. Here, it is preferable to use aluminum because of its good heat dissipation and light weight.

  The shape of the support member 11 is not limited to a flat surface as shown in FIG. 1, and can be an appropriate shape according to the sterilization target, and can be a curved surface shape, an annular shape, or the like.

  On the support member 11, a plurality of convex portions 12 are arranged one-dimensionally. The convex portion 12 supports the light emitting diode 13 and also functions as a connecting portion fitted to the concave portion 14 of the other light emitting member 10 to integrate the pair of light emitting members 10 together.

  The interval between the convex portions 12 (concave portions 14), that is, the interval between the light emitting diodes 13, is the wavelength profile of the light emitted from the light emitting diode 13A provided on the convex portion 12 of the first support member 11, and the other. It is preferable to set an appropriate interval such that the wavelength profile of the light emitted from the light emitting diode 13B on the support member 11 overlaps. For example, when the size of the upper surface of the light emitting diode is a regular square having a side of 300 to 400 μm, the distance between the centers of the light emitting diode 13A and the light emitting diode 13B can be set to 3 mm to 30 mm. This is because it is difficult to make it less than 3 mm from the relationship between the mounting of the light emitting diode on the convex portion and the rigidity of the convex portion, and when it exceeds 30 mm, the intensity of light emitted from the light emitting diode is very weak. This is because space is generated and it is difficult to overlap the light emitted from the two types of light emitting diodes.

  The thickness of the convex portion 12 (supporting member 11 and concave portion 14) is appropriately determined in view of the size and interval of the light emitting diode 13 and the strength when fitting and integrating with the concave portion 14 of the other light emitting member 10. Just decide.

  Further, the shape of the convex portion 12 (concave portion 14) is not particularly limited, and may be a triangle, a trapezoid, a waveform, or the like in addition to the rectangle as shown in FIG.

  The light emitting diode 13 emits ultraviolet light for sterilizing bacteria included in the sterilization target. Specifically, this light emitting diode can be composed of a group III nitride semiconductor containing Al, Ga, and N.

  Regarding the wavelength of the light emitting diode 13, it is ultraviolet light including a wavelength region of 300 nm or less that has an effect of sterilizing bacteria included in the sterilization target. Therefore, the peak wavelength of the light emitting diode 13 is 290 nm or less. The difference in peak wavelength between the two types of light emitting diodes 13A and 13B is preferably 1 nm or more and 40 nm or less. Thereby, the wavelength spectrum of two types of light emitting diodes 13A and 13B can be overlapped. When sterilizing indirectly by exciting a catalyst such as titanium oxide, ultraviolet light including a wavelength region of 380 nm or less may be used.

  By irradiating the sterilization target with such an ultraviolet irradiation device 1, bacteria contained in the sterilization target can be sterilized. Here, the sterilization target can be all fluids including solids such as body fluids such as water and blood, gases such as air, powders and pasty objects. Also, a fluid composed of a mixture of gas and solid, such as a gas mixed with a solid substance, a fluid composed of a gel-like mixture where gas and liquid are mixed, or a fluid composed of a mixture of solid and liquid But you can.

  The ultraviolet irradiation device 1 according to the present invention can be used, for example, for sterilization of artificial dialysis. Artificial dialysis is a hemodialysis therapy that performs “removal of waste products”, “electrolyte maintenance”, and “water content maintenance” of blood, and can be exemplified by two purposes of ultraviolet irradiation. The first is sterilization and sterilization of purified water that dilutes the concentrated dialysate (stock solution). In order to sterilize and sterilize purified water that has passed through a reverse osmosis device and from which impurities contained in water have been removed. Irradiate ultraviolet rays. The second is the sterilization and sterilization of the joint between the dialysate bag and the connection tube, which sterilizes the bacteria transferred to the dialysis device via the patient when the patient himself / herself handles the dialysis device at home etc. In order to do so, it is irradiated with ultraviolet rays.

  In the ultraviolet irradiation apparatus according to the present invention described above, it is preferable that a light emitting member including a light emitting diode having a shorter radiated light wavelength has a heat dissipation means. A light emitting diode (eg, 13A) that emits light of a shorter wavelength emits more heat, adversely affecting the operation of the light emitting diode (eg, 13B) that emits light of a longer wavelength. Therefore, by providing a heat dissipating means in the light emitting member 10 provided with a light emitting diode (for example, 13A) that emits light of a shorter wavelength, the emitted heat is efficiently dissipated and light of a longer wavelength is emitted. The adverse effect on the operation of the light emitting diode (for example, 13B) can be reduced. As such heat radiating means, there can be used a heat radiating fin for natural air cooling, a fan for forced air cooling, a water cooling device by circulation of a refrigerant, a heat absorption by a heat vip and a cooling device using a Peltier unit. Of these, the heat-conducting material (for example, aluminum, copper, tungsten copper) that absorbs and conducts heat from the light-emitting diode and exchanges heat with a low outside temperature is inexpensive, so heat conductivity is good. It is preferable to use heat radiating fins made of a lightweight material.

  FIG. 4 shows another example of the ultraviolet irradiation device according to the present invention. The ultraviolet irradiation device 2 shown in this figure is composed of a pair of annular light emitting members 20, and each of the light emitting members 20 is provided on one end surface 21A of the cylindrical body 21, as shown in FIG. A plurality of protrusions 22 protruding in the axial direction are arranged side by side in the circumferential direction of the cylindrical body 21, and a light emitting diode 23 is provided on the inner side surface 22 </ b> A of each protrusion 22. And the ultraviolet irradiation device 2 fits the convex part 22 of any one light emitting member 20 of the light emitting member 20, and the recessed part 24 between the convex parts 22 of any other light emitting member 20, and light-emits. The diode 23 is configured such that at least one of the light emitting members 20 has a different radiation wavelength (23A and 23B) and is arranged on the same circumference.

  Also in the case of this ultraviolet irradiation device 2, for example, when the size of the upper surface of the light emitting diode 23 is a regular square having a side of 300 to 400 μm, the distance between the centers of the light emitting diode 23A and the light emitting diode 23B is 3 mm to 30 mm. can do. For example, when a total of 10 light emitting diodes are provided in the periphery (outer surface) of a cylindrical tube having a diameter of 40 mm, the distance between the centers of the light emitting diodes 23A and 23B is approximately 12.56 mm, and a total of 18 light emitting diodes 23 are provided. Is provided, the distance between the centers of the light emitting diodes 23A and 23B is about 7 mm.

  FIG. 6 is a diagram illustrating a state in which the fluid to be sterilized is sterilized using the ultraviolet irradiation device 2 illustrated in FIG. 4. In this ultraviolet irradiation device 2, the inner diameter of the light emitting member 20 is configured to substantially match the outer diameter of the transparent tube 25 made of quartz, acrylic, or the like through which the fluid F to be sterilized flows. A transparent tube 25 is inserted inside and attached, and the light-emitting diode 23 (23A, 23B) in the apparatus 2 is turned on and irradiated with ultraviolet light, and the fluid F to be sterilized is circulated in the transparent tube 25. By doing so, bacteria contained in the fluid F to be sterilized can be sterilized.

  In the ultraviolet irradiation device 2 shown in FIG. 4, the light emitting diodes 23 (23A, 23B) are arranged on the inner side surface 22A of the convex portion 22, but as shown in FIG. It can also be arranged on the side. In this case, a transparent tube 26 covering the outer surface of the irradiation device 2 and a tube 27 having a diameter larger than that of the transparent tube 26 are arranged outside the transparent tube 26, and the fluid F to be sterilized is the transparent tube 26 and the tube 27. Can be configured to circulate between. Accordingly, the fluid F to be sterilized is circulated between the transparent tube 25 and the tube 26 under the state where the light emitting diode 23 in the device 2 is turned on and irradiated with ultraviolet light, thereby the fluid to be sterilized. Bacteria contained in F can be sterilized. In addition, a mechanism for cooling the light emitting diode 23 can be provided by inserting the pipe 28 inside the apparatus 2 and circulating the cooling water W.

  Here, in order to satisfactorily overlap the wavelength profile of light using the device 2 in which the light emitting diode 23 is arranged on the outer surface of the convex portion 22, as shown in FIG. 8 (or the inner surface of the tube 27 itself is used as a reflecting mirror) or, as shown in FIG. 8, the tube 27 is made a transparent tube in the apparatus 2 shown in FIG. It is preferable to use a combination of the ultraviolet sterilizer 3 having the same inner diameter as that of the light emitting diode 33 (33A and 33B) on the inner surface of the light emitting member 30.

  Further, in the case of the annular ultraviolet irradiation device 2 shown in FIG. 4, in order to efficiently overlap the light wavelength profile, as shown in FIG. 9, the light emitting diode (for example, 23A) is opposed to the position. In addition, the same light emitting diode (for example, 23A) is not disposed, and the light emitting diode (for example, 23A) disposed on one side of the light emitting member 20 is replaced with the light emitting diode (for example, 23B) disposed on the other side of the light emitting member 20. It is preferable that they are arranged to face each other. For example, the number of convex portions 22 arranged in parallel to each light emitting member 20, that is, the number of light emitting diodes 23 is an odd number, and the light emitting diodes 23 are evenly arranged in the circumferential direction on one end face 21 </ b> A of the cylindrical body 21. The light-emitting diodes provided on the other side of the light-emitting member 20 at positions opposite to the light-emitting diodes provided on one side of the light-emitting member 20 (for example, 23A) For example, 23B) is arranged. With this configuration, the ultraviolet light irradiated from the light emitting diode 23A provided on one side of the light emitting member 20 and the ultraviolet light irradiated from the light emitting diode 23B provided on the other side of the light emitting member 20 are superimposed. Thus, it becomes easy to synthesize the wavelength spectra of both the light emitting diodes 23A and 23B.

  Further, in order not to create a space where the light intensity is very weak, the opposing position of the light emitting diode 23 is set to a region where the light emitting diode 23 of the convex portion 22 is not disposed (for example, a fitting portion between the light emitting diodes 23A and 23B). That is, another light emitting diode may not be present at a position opposite to a certain light emitting diode 23.

  According to the present invention, the light emitting diodes having different peak wavelengths are alternately arranged one-dimensionally, and a part of the wavelength spectrum of the light emitted from the light emitting diodes is configured to be overlapped. A plurality of convex portions are arranged side by side in one dimension, and a pair of light emitting members is provided, each having a light emitting diode on each convex portion, and the convex portion of one of the light emitting members and the convex portion of the other light emitting member A UV irradiating device is configured by fitting recesses between each other, so that light having a wide wavelength range of the wavelength profile can be irradiated and light having various wavelength profiles can be irradiated. Useful in the field of sterilization and purification.

1, 2, 3 Ultraviolet irradiation device 10, 20, 30 Light emitting member 11 Support member 12, 22 Protrusions 13, 23, 33 Light emitting diodes 14, 24 Concavity 21 Tubular body 21A One end surface 22A of the tubular body Inside the convex part Side surfaces 25 and 26 Transparent tubes 27 and 28 Tube F Fluid W to be sterilized Cooling water

Claims (5)

A plurality of convex portions are arranged one-dimensionally on the support member, and each light-emitting diode is provided on each convex portion. The light-emitting member pair, and the convex portion of one of the light-emitting members and the other The concave portion between the convex portions of the light emitting member is fitted,
The light emitting diode is characterized in that the wavelength of emitted light is different between one and the other of the light emitting member, a part of the wavelength spectrum of the emitted light is overlapped, and the ultraviolet light is arranged alternately in one dimension apparatus.   The ultraviolet irradiation device according to claim 1, wherein one and the other of the light emitting members can be attached and detached.   The ultraviolet irradiation device according to claim 1 or 2, wherein a light emitting member including a light emitting diode having a shorter emitted light wavelength has a heat dissipating means.   The support member is a cylindrical body, the plurality of convex portions project in the axial direction of the cylindrical body on one end surface of the cylindrical body, and the plurality of convex portions are arranged in parallel in the circumferential direction of the cylindrical body. The ultraviolet irradiation device according to any one of claims 1 to 3.   The ultraviolet light irradiation device according to claim 4, wherein the light emitting diode disposed on one side of the light emitting member is disposed to face the light emitting diode disposed on the other side of the light emitting member.

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