JP2017205686A - Uv lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a UV lamp in which an arrangement state of UV LEDs provided inside of a treatment tank is optimized.SOLUTION: In a UV irradiation device 11 in which a plurality of UV LEDs 15, 16 and 17 are arranged inside of a cylindrical treatment tank 12 and UV is applied on water to be treated that flows the inside of the treatment tank, inside of the treatment tank, a plurality of sheets of LED supporting substrates 13 that are set such that a width dimension is shorter than a diameter of the treatment tank and longer than a radius are housed by combining in a rotational symmetry with a shaft line of the treatment tank as a symmetrical axis in a state of forming a passage in a center of the treatment tank by mutually combining LED supporting substrates adjacent in a circumference direction of the treatment tank, a plurality of the UV LEDs are arranged on one surface of each of the LED supporting substrates, and an inner surface of the treatment tank and both surfaces of the LED supporting substrate are formed into a UV reflective surface.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an ultraviolet irradiation device, and more particularly to an ultraviolet irradiation device that sterilizes microorganisms in water or oxidizes organic substances using ultraviolet rays in water purification treatment, sewage treatment, and the like.

  Conventionally, an ultraviolet irradiation water treatment device that sterilizes and disinfects microorganisms and pathogenic protozoa contained in water by irradiating ultraviolet rays has been developed. As this ultraviolet irradiation water treatment device, the treatment water is circulated. There is known an apparatus that performs ultraviolet irradiation by installing an ultraviolet light source in a water channel of a tank. In recent years, ultraviolet LEDs have attracted attention as ultraviolet light sources. As an ultraviolet irradiation water treatment apparatus using an ultraviolet LED, a device in which a number of ultraviolet LEDs are arranged on the inner periphery of a tubular body serving as a treatment tank is known (for example, see Patent Document 1).

Special table 2009-532200 gazette

  However, it is not possible to obtain sufficient ultraviolet irradiation efficiency by appropriately arranging a plurality of ultraviolet LEDs on the inner peripheral surface of the treatment tank. By optimizing the arrangement state of the ultraviolet LEDs according to various conditions, The efficiency of the ultraviolet irradiation water treatment apparatus can be improved while minimizing the number of LEDs installed and reducing power consumption.

  Then, this invention aims at providing the ultraviolet irradiation device which optimized the arrangement | positioning state of ultraviolet LED arrange | positioned inside a processing tank.

  In order to achieve the above object, an ultraviolet irradiation apparatus according to the present invention is an ultraviolet irradiation apparatus that irradiates ultraviolet rays to water to be treated flowing in a treatment tank by arranging a plurality of ultraviolet LEDs inside a cylindrical treatment tank. A plurality of LED support substrates whose width dimension is set to be shorter than the diameter of the treatment tank and longer than the radius inside the treatment tank are combined with each other adjacent to each other in the circumferential direction of the treatment tank. In a state where a passage is formed at the center, the processing tank is stored in combination in a rotationally symmetric state with the axis of the processing tank as an axis of symmetry, and a plurality of ultraviolet LEDs are arranged on one surface of each LED support substrate, and the inner surface of the processing tank In addition, the present invention is characterized in that both surfaces of the LED support substrate are ultraviolet reflecting surfaces.

  Furthermore, in the ultraviolet irradiation device of the present invention, the plurality of ultraviolet LEDs are provided in a plurality of rows in the width direction of the LED support substrate, and the ultraviolet LEDs in the row adjacent to the plurality of ultraviolet LEDs are arranged in a staggered manner. The plurality of ultraviolet LEDs are characterized in that an optical axis of at least some of the ultraviolet LEDs is inclined with respect to the surface of the LED support substrate.

  According to the ultraviolet irradiation device of the present invention, it is possible to efficiently perform ultraviolet treatment on the water to be treated flowing in the treatment tank. Thereby, it is possible to improve the ultraviolet processing efficiency while minimizing the number of installed UV LEDs and reducing the power consumption.

It is a section front view showing the 1st example of an ultraviolet irradiation device of the present invention. It is a sectional side view similarly. It is a figure which shows the relationship between the inclination-angle of the ultraviolet LED of the width direction both sides | lines, and the amount of ultraviolet rays irradiated in the processing tank. It is a fragmentary top view which shows the 2nd example of an arrangement | positioning state of ultraviolet LED. It is explanatory drawing which similarly shows the arrangement | positioning state of the odd-numbered ultraviolet LED from one end. It is explanatory drawing which similarly shows the arrangement | positioning state of the even-numbered ultraviolet LED from one end. It is a figure which shows the result of having measured the amount of ultraviolet rays by changing the inclination-angle of each ultraviolet LED. It is a partial top view which shows the 3rd example of an arrangement | positioning state of ultraviolet LED. It is explanatory drawing which similarly shows the arrangement | positioning state of the odd-numbered ultraviolet LED from one end. It is explanatory drawing which similarly shows the arrangement | positioning state of the even-numbered ultraviolet LED from one end. It is a figure which shows the result of having measured the amount of ultraviolet rays when the space | interval of the center ultraviolet-ray LED in a 3rd example is 20 mm, and the distance of the center of the width direction of a LED support substrate and the center between ultraviolet LED of a center part is 9 mm. is there. It is a figure which shows the result of having changed the space | interval of center ultraviolet LED in a 3rd example, and measuring the amount of ultraviolet rays.

  FIG.1 and FIG.2 has shown the 1st form example of the ultraviolet irradiation device of this invention. The ultraviolet irradiation device 11 is housed in a cylindrical processing tank 12 in a state where four rectangular LED support substrates 13 and 13 are combined and combined. Each LED support substrate 13 is set such that the length in the axial direction of the processing tank 12 is shorter than the length of the processing tank 12, and the width dimension is shorter than the diameter of the processing tank 12 and longer than the radius. In a state where a square tube passage 14 having a square cross section in a watertight state is formed at the center of the two, they are combined in a state of four-fold rotational symmetry with the axis of the treatment tank 12 as the axis of symmetry.

  The LED support substrates 13 adjacent to each other in the circumferential direction of the processing tank 12 are combined in a direction perpendicular to each other, and the inner edge 13a of one LED support substrate 13 is brought into contact with the back surface 13b of one adjacent LED support substrate 13. The inner edge 13c of the other adjacent LED support substrate 13 is in contact with the back surface of the one LED support substrate 13.

  On the surface of each LED support substrate 13, a plurality of ultraviolet LEDs 15, 16, 17 are adjacent to the UV LEDs 15, 17 on both sides in the width direction in a state of being arranged in three rows in the width direction of each LED support substrate 13. The UV LEDs 16 in the center row are arranged in a staggered manner with a half pitch deviation.

  The UV LEDs 16 in the center row are provided in a state of irradiating UV light in the vertical direction from the surface of the LED support substrate 13, and the UV LEDs 15 and 17 on both sides in the width direction correspond to the UV rays radiated from the UV LEDs 16 in the center row. It is provided with an inclination in a state of irradiating with ultraviolet rays in a direction away from it. The inclination angle of each ultraviolet LED 15, 16, 17 can be appropriately set according to conditions such as the inner diameter of the processing tank 12, the size of the LED support substrate 13, the number of installed ultraviolet LEDs 15 to 17, and the installation interval.

  Furthermore, the inner peripheral surface of the treatment tank 12 and the front and back surfaces of each LED support substrate 13 are formed of a material that reflects ultraviolet rays or are subjected to a treatment that reflects ultraviolet rays, and are irradiated from the respective ultraviolet LEDs 15 to 17. The ultraviolet rays are formed so that the ultraviolet rays of the water to be treated flowing in the treatment tank 12 can be treated while being reflected.

  In the rectangular tube passage 14 provided in the center of the processing tank 12, an angular shaft 18 penetrating in the axial direction in the watertight state through the center of the processing tank 12 is inserted. In 14, power cables (not shown) to the ultraviolet LEDs 15 to 17 are inserted.

  The ultraviolet irradiation device 11 formed in this way is adjacent to each other because the plurality of ultraviolet LEDs 15 to 17 are arranged on the surface of the four LED support substrates 13 provided in a state extending in all directions from the center of the treatment tank 12. It is possible to effectively irradiate ultraviolet rays to the entire water to be treated flowing in a quarter-circle section surrounded by the two LED support substrates in the orthogonal state and the inner peripheral surface of the treatment tank 12.

  Thereby, ultraviolet treatment of to-be-processed water can be performed efficiently, the number of installation of ultraviolet LED15-17 can be minimized, and improvement in ultraviolet treatment efficiency can be aimed at, aiming at reduction of power consumption. Further, since the power cables of the ultraviolet LEDs 15 to 17 can be accommodated in the central rectangular tube passage 14, electrical wiring can be easily performed.

  FIG. 3 shows the relationship between the inclination angle of the ultraviolet LEDs 15 and 17 on both sides in the width direction and the amount of ultraviolet rays irradiated into the treatment tank 12. From this result, it is understood that the inclination angle of the ultraviolet LEDs 15 and 17 is optimally about 40 degrees.

  4 to 6 show a second example of the arrangement state of the ultraviolet LEDs. In this arrangement example, odd-numbered ultraviolet LEDs 15, 17 such as the first A and the third C from one end in the processing tank axial direction are arranged so as to irradiate ultraviolet rays in a direction away from the center of the substrate as shown in FIG. The even-numbered ultraviolet LEDs 15 and 17 such as the second B and the fourth D are arranged so as to irradiate ultraviolet rays toward the center of the substrate as shown in FIG.

  In the center row, the two ultraviolet LEDs 16a and 16b are arranged so that the odd number irradiates the ultraviolet rays in a direction away from each other, and the even number irradiates the ultraviolet rays in a direction (crossing direction) approaching each other. It is arranged.

  FIG. 7 shows the result of measuring the amount of ultraviolet rays by changing the inclination angle of each ultraviolet LED arranged in this way. From this result, it is understood that the optimum inclination angle in this arrangement state is about 35 degrees.

  8 to 10 show a third example of the arrangement state of the ultraviolet LEDs. In this arrangement example, as in the second embodiment on both sides, the ultraviolet LEDs 15 and 17 are arranged so that the odd number is inclined in the direction away from the center of the substrate and the even number is inclined in the direction toward the center of the substrate. The ultraviolet LEDs 16a and 16b are located in a direction away from the central portion of the substrate, one ultraviolet LED 16a is perpendicular to the substrate surface, and the ultraviolet LED 16b near the other central portion is away from the ultraviolet rays of the one ultraviolet LED 16a. Are arranged so as to be irradiated with ultraviolet rays.

  Here, when the width dimension of the LED support substrate is 120 mm, one ultraviolet LED 15 is disposed at a position 10 mm from one side, the other ultraviolet LED 17 is disposed at a position 10 mm from the other side, and the distance between the ultraviolet LEDs 16 a and 16 b is 20 mm, When the ultraviolet ray LEDs 16a and 16b were moved a distance m from the center CL in the width direction of the LED support substrate and the ultraviolet ray amount was measured, 5.151 when m = 6 mm, 5.456 when m = 9 mm, and 5.313 when m = 12 mm. M = 9 mm was found to be optimal. The result of measuring the amount of ultraviolet rays in the treatment tank at this time is shown in FIG.

  Further, FIG. 12 shows the result of measuring the amount of ultraviolet rays when m = 9 mm and the interval between the ultraviolet LEDs 16a and 16b is changed. From this result, it is understood that the distance between the ultraviolet LEDs 16a and 16b is optimally about 20 mm.

  The number of the LED support substrates is arbitrary as long as a plurality of LED support substrates can be combined to form a wiring passage in the center, and various conditions such as the inner diameter and length of the treatment tank, the flow rate of water to be treated, etc. It can be appropriately selected depending on the situation. Further, the number of installations including the number of columns and the arrangement state including the irradiation direction of the ultraviolet LEDs provided on each LED support substrate are arbitrary, and can be appropriately set according to various conditions. Further, a general UV LED can be used.

DESCRIPTION OF SYMBOLS 11 ... Ultraviolet irradiation apparatus, 12 ... Processing tank, 13 ... LED support substrate, 13a ... Inner edge, 14 ... Square tube path, 15, 16, 16a, 16b, 17 ... Ultraviolet LED, 18 ... Square axis

Claims (4)

  In the ultraviolet irradiation apparatus for irradiating the water to be treated flowing in the treatment tank by arranging a plurality of ultraviolet LEDs inside the cylindrical treatment tank, the width dimension is shorter than the diameter of the treatment tank inside the treatment tank. In addition, a plurality of LED support substrates set longer than the radius are combined with each other in the circumferential direction of the processing bath to form a passage in the center of the processing bath, and the axis of the processing bath is symmetrical. It is housed in combination in a rotationally symmetric state with an axis, and a plurality of ultraviolet LEDs are arranged on one surface of each LED support substrate, and the inner surface of the processing tank and both surfaces of the LED support substrate are ultraviolet reflection surfaces. An ultraviolet irradiation device.   The ultraviolet irradiation apparatus according to claim 1, wherein the plurality of ultraviolet LEDs are provided in a plurality of rows in the width direction of the LED support substrate.   The ultraviolet irradiation device according to claim 2, wherein the plurality of ultraviolet LEDs are arranged in a staggered manner in adjacent rows of ultraviolet LEDs.   4. The plurality of ultraviolet LEDs are provided such that an optical axis of at least some of the ultraviolet LEDs is inclined with respect to the surface of the LED support substrate. 5. UV irradiation equipment.

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