JP2017121592A - Ultraviolet irradiation unit and ultraviolet irradiation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the following problem: a countermeasure for stabilizing an irradiation amount of ultraviolet irradiated by an ultraviolet irradiation part in each area of a flow pass is as yet not sufficient.SOLUTION: An ultraviolet irradiation unit includes an irradiation-side base plate, a plurality of ultraviolet irradiation parts, an irradiation-side ultraviolet transmission member, heat radiation parts, a detection-side base plate, a plurality of ultraviolet detection parts and a detection-side ultraviolet transmission member. The plurality of ultraviolet irradiation parts are disposed on the irradiation-side base plate so as to be spaced away from each other, and irradiate treatment fluid with ultraviolet. The irradiation-side ultraviolet transmission member is mounted on the irradiation sides of the plurality of ultraviolet irradiation parts. The plurality of heat radiation parts have heat conductive plates and heat radiation fins. The heat conductive plates are respectively mounted on the plurality of ultraviolet irradiation parts. The heat radiation fins are mounted on the heat conductive plates. The plurality of ultraviolet detection parts are mounted on positions facing each of the plurality of the ultraviolet irradiation parts on the detection-side base plate to detect the ultraviolet and output intensity information corresponding to the intensity of the ultraviolet. The detection-side ultraviolet transmission member is mounted on the detection side of the plurality of ultraviolet detection parts.SELECTED DRAWING: Figure 1

Description

  Embodiments relate to an ultraviolet irradiation unit and an ultraviolet irradiation apparatus.

  Fluids such as liquids such as water and gases such as air can be contaminated by microorganisms. These microorganisms can adversely affect consumer health. Therefore, microorganisms present in the fluid need to be inactivated before the fluid is used by consumers.

  As a method for inactivating harmful microorganisms in a fluid, there is a method using ultraviolet light having a wavelength of 200 nm to 300 nm. It is known that ultraviolet rays having a wavelength in the range of 200 nm to 300 nm are absorbed by, for example, DNA, RNA, and protein, inactivate harmful microorganisms that damage genes, and suppress proliferation power. Many devices and systems have been proposed and put to practical use that utilize the inactivation effect of the microorganisms of ultraviolet rays and use the inactivation effect of harmful microorganisms in the fluid.

  On the other hand, a conventional mercury lamp, a recently developed ultraviolet LED (Light Emitting Diode) that does not use mercury, and the like are used as an ultraviolet irradiation unit that irradiates ultraviolet rays. An ultraviolet irradiation device in which one or a plurality of ultraviolet irradiation units is provided in a flow path of a fluid to be processed is disclosed.

JP 2014-212445 A JP2012-115715A JP 2012-205615 A JP 2006-346676 A

  However, in the above-described ultraviolet irradiation device, it cannot be said that the ultraviolet irradiation amount irradiated by the ultraviolet irradiation unit is constant in each region of the flow path, and there is still a measure for stabilizing the irradiation amount in each region of the flow path. not enough.

  In order to solve the above-described problems and achieve the object, the ultraviolet irradiation unit of the embodiment includes an irradiation side substrate, a plurality of ultraviolet irradiation units, an irradiation side ultraviolet transmission member, a heat radiation unit, a detection side substrate, A plurality of ultraviolet detection units and a detection-side ultraviolet transmission member are provided. The plurality of ultraviolet irradiation units are arranged at intervals on the irradiation side substrate and irradiate the fluid to be processed with ultraviolet rays. The irradiation side ultraviolet transmissive member is provided on the irradiation side of the plurality of ultraviolet irradiation units. The plurality of heat radiating portions include a heat conductive plate and heat radiating fins. The heat conductive plate is provided in each of the plurality of ultraviolet irradiation units. The radiating fin is provided on the heat conducting plate. The plurality of ultraviolet detection units are provided at positions facing each of the plurality of ultraviolet irradiation units on the detector side substrate, detect the ultraviolet rays, and output intensity information corresponding to the intensity of the ultraviolet rays. The detection-side ultraviolet transmitting member is provided on the detection side of the plurality of ultraviolet detection units.

FIG. 1 is an overall configuration diagram of an ultraviolet irradiation unit according to the first embodiment. FIG. 2 is a sectional view taken along the line II-II in FIG. FIG. 3 is a sectional view taken along the line III-III in FIG. FIG. 4 is an arrow view seen along the direction of arrow IV in FIG. FIG. 5 is a graph showing the relationship between the temperature of the ultraviolet irradiation unit and the flow velocity of the fluid to be processed. FIG. 6 is a graph showing the relationship between the intensity of ultraviolet rays irradiated from the ultraviolet irradiation unit and the voltage supplied to the ultraviolet irradiation unit. FIG. 7 is a graph showing the relationship between the ultraviolet irradiation amount and the inactivation rate of harmful microorganisms. FIG. 8 is a diagram illustrating the internal configuration of the ultraviolet irradiation device according to the second embodiment. FIG. 9 is a sectional view taken along line IX-IX in FIG. FIG. 10 is a diagram illustrating a control system of the ultraviolet irradiation device according to the second embodiment. FIG. 11 is a flowchart for explaining voltage control processing by the control device. FIG. 12 is a flowchart for explaining the monitoring process of the ultraviolet irradiation unit by the control device. FIG. 13 is a diagram illustrating the internal configuration of the ultraviolet irradiation device according to the third embodiment. FIG. 14 is a cross-sectional arrow view taken along line XIV-XIV in FIG. FIG. 15 is a flowchart illustrating drive member drive control processing by the control device of the third embodiment.

  Similar components are included in the following exemplary embodiments and modifications. Therefore, below, the same code | symbol is attached | subjected to the same component, and the overlapping description is partially abbreviate | omitted. Portions included in the embodiments and modifications can be configured by replacing corresponding portions in other embodiments and modifications. In addition, the configuration, position, and the like of the parts included in the embodiments and modifications are the same as those in the other embodiments and modifications unless otherwise specified.

  The ultraviolet irradiation device according to the following embodiments aims to individually correspond to the ultraviolet intensity of a plurality of ultraviolet irradiation units configured by ultraviolet LEDs or the like.

<First Embodiment>
FIG. 1 is an overall configuration diagram of an ultraviolet irradiation unit 10 according to the first embodiment. The ultraviolet irradiation unit 10 inactivates contaminants contained in the fluid (hereinafter, the object to be processed) with ultraviolet rays. The fluid that is the object to be processed is a liquid such as water or a gas such as air. As shown in FIG. 1, the ultraviolet irradiation unit 10 includes an ultraviolet irradiation set 12, a heat radiation unit set 14, and an ultraviolet sensor set 16.

  The ultraviolet irradiation set 12 includes an irradiation side substrate 20, a plurality of (for example, eight) ultraviolet irradiation units 22, and an irradiation side ultraviolet transmission member 24.

  The irradiation side substrate 20 includes an insulating material. The irradiation side base | substrate 20 is a rectangular plate-shaped member, for example. The irradiation side substrate 20 holds the ultraviolet irradiation unit 22.

  The plurality of ultraviolet irradiation units 22 are arranged on the irradiation side substrate 20 at intervals. The plurality of ultraviolet irradiation units 22 are arranged at regular intervals on a straight line, for example. The ultraviolet irradiation unit 22 includes, for example, an LED (Light Emitting Diode) that emits ultraviolet light held in a space sealed by a case or the like. The ultraviolet irradiation unit 22 irradiates the object to be processed with ultraviolet rays. As the ultraviolet irradiation unit 22, it is preferable to select an LED that irradiates ultraviolet rays having a wavelength of 200 nm to 300 nm, which has an inactivation effect on harmful microorganisms.

  The irradiation side ultraviolet light transmitting member 24 is a plate-like member. The irradiation-side ultraviolet transmitting member 24 is provided over the plurality of ultraviolet irradiation units 22. The irradiation side ultraviolet transmissive member 24 is provided on the surface of the ultraviolet irradiation unit 22 on the side irradiated with ultraviolet rays (hereinafter referred to as an irradiation surface), and keeps the liquid to be treated from touching the ultraviolet irradiation unit 22. The irradiation side ultraviolet light transmitting member 24 includes a material that transmits ultraviolet light. The irradiation-side ultraviolet light transmitting member 24 is preferably made of, for example, quartz glass that almost transmits ultraviolet light having a wavelength of 200 nm to 300 nm. Thereby, the irradiation side ultraviolet light transmissive member 24 can efficiently use the ultraviolet rays irradiated by the ultraviolet irradiation unit 22.

  The heat radiating part set 14 has a plurality of heat radiating parts 25. The number of heat radiation units 25 is the same as the number of ultraviolet irradiation units 22. The plurality of heat radiating portions 25 include a heat conductive plate 26 and a plurality of heat radiating fins 28.

  The heat conductive plate 26 is provided in each of the plurality of ultraviolet irradiation units 22. The heat conduction plate 26 is provided on the surface opposite to the irradiation surface of the ultraviolet irradiation unit 22. The heat conductive plate 26 includes a material having high heat conductivity.

  The plurality of heat radiation fins 28 are provided on the surface of each heat conducting plate 26 opposite to the surface on which the ultraviolet irradiation unit 22 is provided. The plurality of radiating fins 28 are plate-like members and are arranged to face each other with a space therebetween. The radiation fins 28 radiate heat generated by the heat generated by the ultraviolet irradiation unit 22 and conducted through the heat conduction plate 26. Thereby, the radiation fin 28 removes heat from the ultraviolet irradiation unit 22.

  The ultraviolet sensor set 16 includes a detection-side substrate 30, a plurality of ultraviolet sensors 32 that are an example of an ultraviolet detection unit, and a light-receiving-side ultraviolet transmission member 34.

  The detection base 30 includes an insulating material. The detection side base 30 is, for example, a rectangular plate member. The detection side substrate 30 holds an ultraviolet sensor 32.

  The plurality of ultraviolet sensors 32 are arranged on a straight line at the same interval as the ultraviolet irradiation unit 22, for example. The number of ultraviolet sensors 32 is the same as the number of ultraviolet irradiation units 22. The plurality of ultraviolet sensors 32 are arranged on the detection-side substrate 30 at intervals. Specifically, each ultraviolet sensor 32 is provided at a position facing each of the plurality of ultraviolet irradiation units 22 on the detection-side substrate 30. It is preferable to arrange the light receiving axis of the ultraviolet sensor 32 so as to coincide with the irradiation axis of the opposing ultraviolet irradiation unit 22 in the ultraviolet irradiation direction. The ultraviolet sensor 32 is, for example, a photodiode or a phototransistor that receives ultraviolet light and converts it into an electrical signal. The ultraviolet sensor 32 detects the ultraviolet rays irradiated by the ultraviolet irradiation unit 22 and outputs information corresponding to the intensity of the ultraviolet rays as an electrical signal.

  The light receiving side ultraviolet light transmitting member 34 is a plate-like member. The light-receiving side ultraviolet transmitting member 34 is provided across the plurality of ultraviolet sensors 32. The light-receiving-side ultraviolet transmitting member 34 is provided on the surface of the ultraviolet sensor 32 on the ultraviolet detection side, and keeps the liquid to be processed from touching the light-receiving-side ultraviolet transmitting member 34. The light receiving side ultraviolet light transmitting member 34 includes, for example, a material that transmits the same ultraviolet light as the irradiation side ultraviolet light transmitting member 24.

  FIG. 2 is a sectional view taken along the line II-II in FIG. As shown in FIG. 2, the ultraviolet irradiation set 12 further includes a plurality of irradiation side temperature sensors 36 and a plurality of DC power sources 38.

  The plurality of irradiation side temperature sensors 36 are individually provided in each of the plurality of ultraviolet irradiation units 22. The irradiation side temperature sensor 36 detects and outputs the temperature of the ultraviolet irradiation unit 22 or the vicinity of the ultraviolet irradiation unit 22.

  The plurality of DC power sources 38 are individually connected to each of the plurality of ultraviolet irradiation units 22. The DC power supply 38 may be provided inside the ultraviolet irradiation unit 10 or may be provided as a separate part outside the ultraviolet irradiation unit 10. The DC power supply 38 supplies DC power to the ultraviolet irradiation unit 22.

  FIG. 3 is a sectional view taken along the line III-III in FIG. As shown in FIG. 3, the ultraviolet sensor set 16 further includes a plurality of light receiving side temperature sensors 40.

  Each light receiving side temperature sensor 40 is provided in correspondence with each of the ultraviolet sensors 32. The light receiving side temperature sensor 40 detects and outputs the ultraviolet sensor 32 or the temperature in the vicinity of the ultraviolet sensor 32.

  The plurality of ultraviolet sensors 32 are connected to a sensor DC power supply 42. The sensor DC power source 42 may be provided inside the ultraviolet irradiation unit 10 or may be provided as a separate component outside the ultraviolet irradiation unit 10. Direct current power is supplied to the ultraviolet sensor 32 from a direct current power source 42 for sensors.

  FIG. 4 is an arrow view seen along the direction of arrow IV in FIG. As shown in FIG. 4, the heat radiation fins 28 of each heat radiation unit set 14 are arranged in parallel so as to face each other with a space therebetween.

  Next, the effect | action of the ultraviolet irradiation unit 10 mentioned above is demonstrated.

  A fluid to be treated containing harmful microorganisms flows between the ultraviolet irradiation set 12 and the ultraviolet sensor set 16. The fluid to be treated receives ultraviolet rays having a wavelength of 200 nm to 300 nm irradiated by the ultraviolet irradiation unit 22 of the ultraviolet irradiation set 12. Thereby, the harmfulness and proliferation power of harmful substances contained in the fluid to be treated are suppressed and inactivated. The harmfulness of harmful substances refers to the property of damaging genes when absorbed by DNA, RNA and proteins, for example.

  Here, the relationship between the temperature of the ultraviolet irradiation unit 22 and the flow rate of the fluid to be processed will be described. FIG. 5 is a graph showing the relationship between the temperature of the ultraviolet irradiation unit 22 and the flow rate of the fluid to be processed. When the DC power supply 38 supplies DC power to the ultraviolet irradiation unit 22, the ultraviolet irradiation unit 22 emits ultraviolet rays and generates heat. The heat of the ultraviolet irradiation unit 22 is transmitted to the heat radiating fins 28 through the heat conductive plate 26. The radiating fin 28 radiates the heat to the fluid to be processed that flows in the vicinity of the radiating fin 28. Here, since the heat transfer coefficient between the heat radiating fin 28 and the fluid to be processed changes depending on the flow velocity of the fluid to be processed, the voltage supplied to the ultraviolet irradiation unit 22 is fixed and attached to the ultraviolet irradiation unit 22. The temperature measured by the irradiation side temperature sensor 36 and the flow rate of the fluid to be processed have the relationship shown in FIG. Specifically, when the flow rate of the fluid to be processed is low, the temperature of the ultraviolet irradiation unit 22 is high, and as the flow rate of the fluid to be processed increases, the temperature of the ultraviolet irradiation unit 22 decreases.

  Next, the relationship between the intensity of the ultraviolet rays irradiated from the ultraviolet irradiation unit 22 and the voltage supplied to the ultraviolet irradiation unit 22 will be described. FIG. 6 is a graph showing the relationship between the intensity of the ultraviolet rays irradiated from the ultraviolet irradiation unit 22 and the voltage supplied to the ultraviolet irradiation unit 22. As shown in FIG. 6, the intensity of the ultraviolet light irradiated by the ultraviolet irradiation unit 22 changes in proportion to the voltage supplied to the ultraviolet irradiation unit 22 when the flow rate of the fluid to be processed is constant.

Next, the relationship between the ultraviolet irradiation amount D and the inactivation rate S of harmful microorganisms will be described. FIG. 7 is a graph showing the relationship between the ultraviolet irradiation amount D and the inactivation rate S of harmful microorganisms. The UV irradiation amount D is determined by the UV intensity I and the exposure time T, which is the time during which the fluid to be treated is exposed to UV light. Here, as shown in the following equation, the product of the common logarithm of the value obtained by dividing the number of harmful microorganisms N ₀ contained in the fluid to be treated before ultraviolet irradiation by the number of harmful microorganisms N after ultraviolet irradiation and “−1” is obtained. It is defined as the inactivation rate S. In this case, the ultraviolet irradiation amount D and the inactivation rate S of harmful microorganisms have the relationship shown in FIG. Specifically, when the ultraviolet irradiation amount D is small, the inactivation effect is small, and as the ultraviolet irradiation amount D increases, the inactivation effect increases.
S = −Log (N / N ₀ )

  From the above relationship, when there is a flow velocity distribution in the ultraviolet irradiation unit 10 and the voltages supplied to all the ultraviolet irradiation units 22 are kept constant at the same value, the fluid to be treated is the ultraviolet irradiation set 12 and the ultraviolet sensor set 16. Depending on the area that passes between the two, some of the harmful microorganisms in the fluid to be treated are exposed to an excessive amount of ultraviolet light for the inactivation rate, while the remaining part of the harmful microorganisms are not targeted. A sufficient amount of UV irradiation is not irradiated with respect to the activation rate. Therefore, depending on the region through which the fluid to be treated passes, there is a possibility that harmful microorganisms may be discharged.

  The relationship between the flow rate of the fluid to be treated for each voltage supplied to the ultraviolet irradiation unit 22 and the temperature of the ultraviolet irradiation unit 22 measured by the irradiation side temperature sensor 36 is examined in advance, and the voltage and ultraviolet intensity shown in FIG. In accordance with the flow velocity distribution around the ultraviolet irradiation unit 10, each ultraviolet irradiation unit 22 has the same ultraviolet irradiation amount D for any region through which the fluid to be processed passes. Control the voltage supplied.

  As described above, the ultraviolet irradiation unit 10 according to the present embodiment includes the ultraviolet sensor 32 that outputs an electrical signal corresponding to the ultraviolet intensity of the ultraviolet irradiation unit 22, so that the ultraviolet intensity of each of the plurality of ultraviolet irradiation units 22 is individually determined. Can be controlled. As a result, the ultraviolet irradiation unit 10 can make the irradiation amount of the ultraviolet rays irradiated by the ultraviolet irradiation unit 22 almost constant in each region of the flow path of the fluid to be processed, and stabilize the irradiation amount in each region of the flow path of the fluid to be processed. Can be made.

  Moreover, since the ultraviolet irradiation unit 10 has the irradiation side temperature sensor 36 which outputs the electrical signal which is the temperature information regarding the temperature of the ultraviolet irradiation part 22, it can control separately based on the temperature of the ultraviolet irradiation part 22. FIG.

  Moreover, since the ultraviolet irradiation unit 10 has the DC power supply 38 connected to each of the ultraviolet irradiation units 22, it can be individually controlled based on the ultraviolet intensity of the ultraviolet irradiation unit 22.

Second Embodiment
FIG. 8 is a diagram illustrating the internal configuration of the ultraviolet irradiation device 50 according to the second embodiment. FIG. 9 is a sectional view taken along line IX-IX in FIG. 8 and 9, the direction indicated by the white thick arrow is the direction in which the fluid to be treated that is treated with ultraviolet rays flows (hereinafter referred to as the flow path direction).

  As shown in FIGS. 8 and 9, the ultraviolet irradiation device 50 according to the second embodiment includes a fluid inlet 52 to be processed, a flow channel enlargement unit 54, a chamber 56 that is an example of a storage unit, and a flow channel reduction unit 58. A fluid outlet 60 to be processed and a plurality of ultraviolet irradiation units 10.

  The fluid inlet 52 is provided at the upstream end of the ultraviolet irradiation device 50. The fluid inlet 52 to be processed has a hollow cylindrical shape. A fluid to be processed flows into the fluid inlet 52 to be processed.

  The flow path expanding portion 54 is connected to the downstream side of the fluid inlet 52 to be processed. The flow path enlarged portion 54 is configured in a hollow cylindrical shape. The space inside the flow path expanding portion 54 expands as it goes downstream.

  The chamber 56 is connected to the downstream side of the flow path expanding portion 54. The chamber 56 is configured in a hollow cylindrical shape. The inner diameter of the chamber 56 is larger than the inner diameter of the fluid inlet 52 to be processed and is approximately equal to the inner diameter of the opening on the downstream side of the flow path expanding portion 54. The chamber 56 is an internal space and houses a plurality of ultraviolet irradiation units 10.

  The flow path reducing unit 58 is connected to the downstream side of the chamber 56. The flow path reduction part 58 is comprised by the hollow cylinder shape. The space inside the flow path reducing portion 58 is reduced as it goes downstream. The inner diameter of the upstream opening of the flow path reducing portion 58 is substantially equal to the inner diameter of the chamber 56.

  The fluid outlet 60 to be processed is provided at the downstream end of the ultraviolet irradiation device 50. The fluid outlet 60 to be processed is connected to the downstream side of the flow path reducing portion 58. The fluid outlet 60 to be processed has a hollow cylindrical shape. The inner diameter of the fluid outlet 60 to be processed is substantially equal to the inner diameter of the downstream opening of the flow path reducing portion 58. The processed fluid outlet 60 discharges the processed fluid that has been processed.

  The fluid flow path of the fluid to be processed is constituted by the connection of the internal spaces of the fluid inlet 52 to be processed, the flow channel expanding portion 54, the chamber 56, the flow channel reducing portion 58, and the fluid outlet 60 to be processed.

  In the present embodiment, the number of ultraviolet irradiation units 10 is eight. The ultraviolet irradiation unit 10 is fixed in the chamber 56.

  In the ultraviolet irradiation unit 10, the ultraviolet irradiation unit 22 is desirably arranged so that the irradiation direction of the ultraviolet rays is orthogonal to the flow path direction, but according to the present embodiment by being arranged so as to intersect the flow path direction. The effect can be expected. The ultraviolet sensor 32 faces the ultraviolet irradiation unit 22 across the flow path.

  The eight ultraviolet irradiation units 10 are arranged in a matrix of 2 × 4 with a space between each other. Specifically, two ultraviolet irradiation units 10 are arranged at equidistant positions in the flow direction of the fluid to be processed. A row of the two ultraviolet irradiation units 10 is a unit row. Further, four unit rows each including two ultraviolet irradiation units 10 are arranged at different positions in the flow direction of the fluid to be processed.

  The ultraviolet irradiation direction of the unit row is different from the ultraviolet irradiation direction of the adjacent unit row. Specifically, the ultraviolet irradiation direction of the unit rows is opposite to the ultraviolet irradiation direction of the adjacent unit rows.

  The position of the ultraviolet irradiation set 12 in one unit row is substantially the same as the position of the ultraviolet irradiation set 12 in the adjacent unit row in the irradiation direction. In other words, when viewed along the flow direction of the fluid to be processed, the ultraviolet irradiation set 12 of one unit row and the ultraviolet irradiation set 12 of the adjacent unit row almost overlap each other. In addition, the position of the ultraviolet sensor set 16 in one unit row is substantially the same as the position of the ultraviolet sensor set 16 in the adjacent unit row in the irradiation direction. In other words, when viewed along the flow direction of the fluid to be processed, the ultraviolet sensor set 16 of one unit row and the ultraviolet sensor set 16 of the adjacent unit row almost overlap each other.

  The heat radiation unit set 14 of the unit row arranged on the downstream side of the one unit row on the downstream side of the irradiation section 62 in which the ultraviolet ray irradiation unit 22 of the ultraviolet irradiation unit 10 of the one unit row irradiates the processing fluid with ultraviolet rays. The heat radiating portion 25 is arranged. As a result, the fluid to be processed flowing through the irradiation section 62 where the heat radiating section 25 of one unit row irradiates ultraviolet rays flows through the heat radiating area 64 that cools the heat radiating section set 14 of the adjacent unit row. In FIG. 8, the area hatched with dots is the irradiation section 62. A region hatched with fine lines is a heat dissipation region 64.

  Next, operation | movement of the ultraviolet irradiation device 50 of 2nd Embodiment is demonstrated.

  The fluid to be treated that has flowed in spreads in the chamber 56 through the fluid to be treated inlet 52 and the flow passage expanding portion 54.

  The fluid to be processed flowing in the irradiation section 62 of the first unit row is processed by the ultraviolet rays irradiated by the ultraviolet irradiation unit 22 of the first row, and then flows through the heat radiation area 64 of the unit row of the second row. The ultraviolet irradiation unit 22 in the second row is cooled via the 14 heat radiation fins 28. Thereafter, the processed fluid is processed by the ultraviolet rays irradiated by the ultraviolet irradiation unit 22 of the third unit row, and then flows through the heat radiation area 64 of the fourth unit row to release the heat from the heat radiating unit set 14. The ultraviolet irradiation unit 22 in the fourth row is cooled through the fins 28.

  On the other hand, the fluid to be processed flowing through the heat radiation area 64 of the first unit row cools the ultraviolet irradiation unit 22 of the first unit row via the heat radiation fins 28 of the heat radiation unit set 14, and then the second row unit. It flows through the irradiation section 62 of the row and is processed by the ultraviolet rays irradiated by the ultraviolet irradiation section 22 in the second row. Thereafter, the fluid to be treated flows through the heat radiation area 64 of the third unit row and cools the fourth row of ultraviolet irradiation units 22 via the heat radiation fins 28 of the heat radiation unit set 14. It is processed by the ultraviolet rays irradiated by the ultraviolet irradiation unit 22 of the unit row.

  The fluid to be treated that has passed through the fourth row of unit rows and inactivated harmful microorganisms is compressed by the flow path reducing section 58 and then discharged from the fluid outlet 60 to be treated.

  FIG. 10 is a diagram illustrating a control system of the ultraviolet irradiation device 50 according to the second embodiment. As shown in FIG. 10, the ultraviolet irradiation device 50 further includes a control device 70.

  The control device 70 includes, for example, an arithmetic processing device including a processor such as a CPU (Central Processing Unit), a storage device including a RAM (Random Access Memory), a ROM (Read Only Memory), an HDD (Hard Disk Drive), and the like. A computer having hardware. The control device 70 controls the ultraviolet irradiation device 50.

  The control device 70 is connected to the irradiation side temperature sensor 36 of the ultraviolet irradiation unit 10, the ultraviolet sensor 32, the light receiving side temperature sensor 40 of the ultraviolet sensor set 16, and a plurality of DC power supplies 38.

  The control device 70 acquires a signal corresponding to the temperature of the ultraviolet irradiation unit 22 from the irradiation side temperature sensor 36 as temperature information. The control device 70 acquires a signal corresponding to the intensity of the ultraviolet rays that have been irradiated by the ultraviolet irradiation unit 22 and passed through the fluid to be processed from the plurality of ultraviolet sensors 32 as ultraviolet intensity information.

  The control device 70 determines the inactivation rate of the fluid to be treated by the ultraviolet rays irradiated by the ultraviolet irradiation unit 22 based on the ultraviolet intensity converted from the ultraviolet intensity information.

  Based on the ultraviolet intensity of one ultraviolet irradiation section 22 and the ultraviolet intensity of the other ultraviolet irradiation section 22 among the ultraviolet intensity of the plurality of ultraviolet irradiation sections 22, the control device 70 detects an abnormality of one ultraviolet irradiation section 22. Determine.

  When the converted temperature corresponding to the temperature of the ultraviolet irradiation unit 22 converted from the temperature information acquired from the plurality of irradiation side temperature sensors 36 is higher than the preset upper limit temperature, the control device 70 supplies the ultraviolet irradiation unit 22 with the converted temperature. The voltage of the DC power from the DC power source 38 is lowered.

  The control device 70 individually controls the voltage of the DC power that the DC power supply 38 supplies to the UV irradiation unit 22 based on the temperature information and the UV intensity information.

  The control device 70 acquires an electrical signal corresponding to the temperature of the ultraviolet sensor 32 from the light receiving side temperature sensor 40 as sensor side temperature information, and monitors the abnormality of the ultraviolet sensor 32.

  FIG. 11 is a flowchart for explaining voltage control processing by the control device 70. The control device 70 executes the voltage control processing shown in FIG. 11 when the arithmetic processing device reads the program stored in the storage unit.

Target inactivation rate S for harmful microorganisms of interest, distance L _{1... N} in the flow direction of the fluid to be treated in the ultraviolet irradiation section 62 assigned to each ultraviolet irradiation section 22, upper limit temperature TH of the ultraviolet irradiation section 22 Each _LIM is preset and stored in a storage device (not shown) in the control device 70 (S100). Here, the upper limit temperature TH _LIM is an upper limit temperature at which the ultraviolet irradiation unit 22 does not break. Therefore, the control device 70 can prevent the ultraviolet irradiation unit 22 from being damaged.

Next, the control device 70 was determined as the ultraviolet irradiation amount necessary for obtaining the target inactivation rate S based on the relationship between the ultraviolet irradiation amount D and the inactivation rate S of harmful microorganisms shown in FIG. A target ultraviolet irradiation amount _DT is calculated (S110).

Next, the control device 70 calculates the converted temperature T corresponding to the temperature of each ultraviolet irradiation unit 22 based on the relationship between the predetermined electrical signal and the converted temperature from the temperature information acquired from each irradiation side temperature sensor 36. _{1 ... n} is converted (S120). The control device 70 compares the converted temperatures T _{1... N} with the preset upper limit temperature TH _LIM (S130).

When the converted temperature T _{1... N} of the ultraviolet irradiation unit 22 is higher than the upper limit temperature TH _LIM (S130: NO), the control device 70 sets the voltage V _1. An operation signal for lowering is output to the DC power supply 38 (S140), and step S120 and subsequent steps are repeated.

On the other hand, when the converted temperature T _{1... N} of the ultraviolet irradiation unit 22 is lower than the upper limit temperature TH _LIM of the ultraviolet irradiation unit 22 (S130: YES), the control device 70 reads the voltage output from each DC power supply 38 ( S150).

The control device 70 is based on a preset relationship among the voltages V _{1... N} supplied to the respective ultraviolet irradiation units 22 shown in FIG. 5, the converted temperatures T _1. The flow velocity u _{1... N} of the fluid to be processed flowing through the ultraviolet irradiation section 62 assigned to each ultraviolet irradiation unit 22 corresponding to the converted temperature T _{1... N} is calculated (S160).

The control device 70 sends each ultraviolet irradiation unit 22 from the flow velocity u _{1... N of the} fluid to be processed in the irradiation section 62 of each ultraviolet irradiation unit 22 and the distance L _{1... N} of the irradiation section 62 of the corresponding ultraviolet irradiation unit 22. The passage time Δt _{1... N} required for the fluid to be processed to pass through the assigned irradiation section 62 is calculated. Further, the control device 70 converts the ultraviolet ray intensity information acquired from the ultraviolet ray sensor 32, and calculates the ultraviolet ray intensity I _{1... N} of each ultraviolet ray irradiation unit 22 (S170).

The control device 70 uses the calculated passage time Δt _{1... N} and ultraviolet intensity I _{1... N} to receive the ultraviolet irradiation amount D _1... Received by the fluid to be processed while passing through the irradiation section 62 assigned to each ultraviolet irradiation unit 22 _{. n} is calculated (S180). Specifically, the control unit 70 multiplies the ultraviolet intensity I _{1 ... n} the passage time Delta] t 1 _{... n} required for the fluid to be treated passes, to calculate the amount of UV irradiation D _{1 ... n.}

The control device 70 integrates the ultraviolet irradiation amounts D _{1... N} of a plurality (for example, all) of the ultraviolet irradiation portions 22 and divides by the number M of the integrated ultraviolet irradiation portions 22 and averages them. _m is calculated (S190).

The control device 70 compares the average ultraviolet ray irradiation amount _Dm with the target ultraviolet ray irradiation amount _DT (S200).

When the average ultraviolet ray irradiation dose _Dm is less than the target ultraviolet ray irradiation dose _DT (S200: YES), the control device 70 outputs an operation signal for uniformly increasing the voltages V _1. The voltages V _{1... N} of the DC power supplied to the plurality of ultraviolet irradiation units 22 are uniformly increased (S210). Note that the control device 70 may determine the voltage increase width based on the relationship between the voltages V _{1... N} and the ultraviolet intensities I ₁ . Thereafter, the control device 70 repeats the processes after step S120.

On the other hand, when the average ultraviolet ray irradiation amount _Dm is equal to or greater than the target ultraviolet ray irradiation amount _DT (S200: NO), the control device 70 determines the average ultraviolet ray irradiation amount _Dm and the ultraviolet ray in the irradiation section 62 assigned to each ultraviolet ray irradiation unit 22. The doses D _{1... N} are compared (S220).

Controller 70, when the average amount of UV irradiation _{D m} and one of the ultraviolet irradiation amount _{D 1 ... n} are different (S220: NO), the different amount of UV irradiation _{D 1 ... n} and the average amount of UV irradiation and _{D m} The magnitude relationship is compared (S230).

The control device 70 responds to an operation signal to increase the voltage V _{1... N} when the ultraviolet irradiation amount D _{1... N} in any irradiation section 62 is lower than the average ultraviolet irradiation amount D _m (S230: YES). The voltage V _{1... N} of the DC power that is output to the DC power supply 38 and supplied to the ultraviolet irradiation unit 22 that irradiates the irradiation section 62 with ultraviolet rays is increased (S210). Note that the control device 70 may determine the voltage increase width based on the relationship between the voltages V _{1... N} and the ultraviolet intensities I ₁ . Thereafter, the control device 70 repeats the processes after step S120.

When the ultraviolet irradiation amount D _{1... N} in the irradiation section 62 is higher than the average ultraviolet irradiation amount D _m (S230: NO), the control device 70 responds to an operation signal for decreasing the voltage V _1. The voltage V _{1... N} of the DC power supplied to the ultraviolet irradiation unit 22 that irradiates the irradiation section 62 with ultraviolet rays is decreased (S140). The control device 70 may determine the voltage decrease width based on the relationship between the voltages V _{1... N} and the ultraviolet intensities I ₁ . Thereafter, the control device 70 repeats the processes after step S120.

When all the ultraviolet irradiation amounts D _{1... N} of the plurality of ultraviolet irradiation units 22 are _equal to the average ultraviolet irradiation amount D _m (S220: YES), the control device 70 determines the average ultraviolet irradiation amount D _m and the target ultraviolet irradiation amount D _T. Are compared (S240).

When the average ultraviolet ray irradiation amount _Dm is not equal to the target ultraviolet ray irradiation amount _DT (S240: NO), the control device 70 outputs an operation signal for decreasing the voltage V _{1... N} to all the DC power sources 38. The voltage V _{1... N} of the DC power supplied to the ultraviolet irradiation unit 22 is uniformly reduced (S140). Here, the case where the average ultraviolet ray irradiation amount _Dm is not equal to the target ultraviolet ray irradiation amount _DT in step S240 is a case where the average ultraviolet ray irradiation amount _Dm is larger than the target ultraviolet ray irradiation amount _DT from the relationship with step S200. That is. The control device 70 may determine the voltage decrease width based on the relationship between the voltages V _{1... N} and the ultraviolet intensities I ₁ . Thereafter, the control device 70 repeats the processes after step S120.

Controller 70, when the average amount of UV irradiation _{D m} is equal to the target amount of UV irradiation _{D T} (S240: YES), step S120 to repeat the subsequent processing.

  FIG. 12 is a flowchart for explaining the monitoring process of the ultraviolet irradiation unit 22 by the control device 70. The control device 70 executes the monitoring process shown in FIG. 12 when the arithmetic processing device reads the monitoring processing program stored in the storage unit. The monitoring process of FIG. 12 may be executed in parallel with the voltage control process of FIG. 11 or may be executed at a different timing.

First, the control device 70 converts the ultraviolet ray intensity information acquired from the ultraviolet ray sensor 32 and calculates the ultraviolet ray intensity I _{1... N} of the ultraviolet ray irradiation units 22 (S300). The control device 70 may store the ultraviolet intensities I _{1... N} calculated in step S170 of the voltage control process in the storage device, and omit step S300.

The control device 70 compares the calculated plurality of ultraviolet intensities I _{1... N} (S310).

As a result of the comparison, the control device 70 determines whether there is an abnormality in the ultraviolet irradiation unit 22 (S330). For example, if the ultraviolet intensity I _{1 ... n} one of the ultraviolet irradiation unit 22 is extremely smaller than the ultraviolet intensity I _{1 ... n} of the other ultraviolet irradiation unit 22, an appropriate by ultraviolet irradiation unit 22 of the one failure or deterioration It means that ultraviolet rays having ultraviolet intensity I _{1... N} are not irradiated. In this case, the control device 70 determines that one ultraviolet irradiation unit 22 is abnormal.

When any one of the ultraviolet irradiation units 22 is abnormal (S330: YES), the control device 70 notifies the warning while indicating the ultraviolet irradiation units 22 that are irradiating the ultraviolet rays having the ultraviolet intensity I _{1... N} (S340). ). The control device 70 notifies a warning by an image or sound by a display device such as a liquid crystal display or a sound output device such as a speaker. Thereafter, the control device 70 repeats Step S300 and subsequent steps.

When the ultraviolet intensity I _{1... N} is greater than or _equal to the threshold intensity THI _{1... N} (S330: NO), the controller 70 repeats step S300 and subsequent steps.

Controller 70, and the average amount of UV irradiation D _m calculated from the intensity information of the ultraviolet sensor 32, by the target amount of ultraviolet irradiation D _T that is set based on the inactivation rate S of the target, as to whether or not that can inactivate Can be judged. Moreover, the control apparatus 70 can control the voltage of the direct-current power supplied to the ultraviolet irradiation part 22 individually or uniformly based on the said determination result.

Controller 70, by comparing the first ultraviolet intensity I _{1 ... n} which was calculated from the intensity information of the ultraviolet sensor 32 and other ultraviolet intensity I _{1 ... n,} can determine an abnormality of the ultraviolet irradiation unit 22.

When the converted temperature T _{1... N} becomes higher than the upper limit temperature TH _{LIM at} which the ultraviolet irradiation unit 22 does not break, the control device 70 reduces the voltage to the ultraviolet irradiation unit 22. Thereby, since the ultraviolet irradiation device 50 can detect before the ultraviolet irradiation part 22 is damaged, the damage of the ultraviolet irradiation part 22 can be prevented in advance and the life can be extended.

  In the ultraviolet irradiation device 50, the heat radiation area 64 of the unit row downstream of the one unit row is disposed on the downstream side of the irradiation section 62 of the one unit row. As a result, the processed fluid can be cooled with the ultraviolet irradiation unit 22 of the next unit row after being treated with the ultraviolet rays of one unit row, so that the treatment and cooling with ultraviolet rays can be efficiently performed.

The control device 70 can estimate the flow velocity u _{1... N} of the fluid to be processed in the irradiation section 62 of each ultraviolet irradiation unit 22 from the converted temperatures T ₁ . Thereby, the ultraviolet irradiation device 50 can make the ultraviolet irradiation amount D _{1... N} irradiated to the fluid to be processed substantially uniform in the chamber 56. In particular, in the ultraviolet irradiation device 50, since the irradiation side temperature sensor 36 is provided corresponding to each ultraviolet irradiation unit 22, the fluid inlet 52, the flow channel enlargement unit 54, the chamber 56, the flow channel reduction unit 58, Even if the shape of the fluid outlet 60 to be treated is different, the ultraviolet irradiation amount D _{1... N} can be controlled in accordance with the flow velocity u _1. .

Furthermore, the control device 70, the flow velocity u _{1 ...} can calculate the amount of UV irradiation D _{1 ... n} of the fluid to be treated is subjected in the irradiation section 62 of the ultraviolet irradiation unit 22 from _n, further, the amount of UV irradiation D _{1 ... n} It can calculate the average amount of UV irradiation D _m.

Thereby, the ultraviolet irradiation device 50 can prevent excessive power consumption by individually controlling the voltage of the ultraviolet irradiation unit 22 while making the ultraviolet irradiation amount D _{1... N} substantially uniform in the chamber 56 and harmful. The inactivation rate of microorganisms can be improved.

Moreover, since the ultraviolet irradiation device 50 controls the voltage based on the flow velocity u _{1... N} of the fluid to be processed, the voltage can be controlled according to the cooling ability of the ultraviolet irradiation portion 22 by the fluid to be processed. Thereby, the ultraviolet irradiation device 50 can individually monitor the state including the temperature of the ultraviolet irradiation unit 22 while improving the uniformity of the temperature of the ultraviolet irradiation unit 22.

<Third Embodiment>
FIG. 13 is a diagram illustrating the internal configuration of the ultraviolet irradiation device 150 according to the third embodiment. FIG. 14 is a cross-sectional arrow view taken along line XIV-XIV in FIG. In FIGS. 13 and 14, the direction indicated by the white thick arrow is the direction in which the fluid to be treated that is treated with ultraviolet rays flows (hereinafter referred to as the flow path direction).

  As shown in FIG. 13 and FIG. 14, the ultraviolet irradiation device 150 of the third embodiment includes a processed fluid inlet 52, a flow channel expanding portion 54, a chamber 56, a flow channel reducing portion 58, and a processed fluid outlet. 60, a plurality of ultraviolet irradiation units 10, a first vertical guide plate set 72, a second vertical guide plate set 74, a first horizontal guide plate set 76, and a second horizontal guide plate set 78.

  The first vertical guide plate set 72 includes a plurality of first vertical guide plates 80 and a first vertical drive member 81. The first vertical driving member 81 simultaneously changes the directions of the plurality of first vertical guide plates 80.

  The second vertical guide plate set 74 includes a plurality of second vertical guide plates 82 and a second vertical drive member 83. The second vertical driving member 83 simultaneously changes the directions of the plurality of second vertical guide plates 82.

  The first vertical guide plate 80 and the second vertical guide plate 82 are disposed on the upstream side of the chamber 56 with respect to the ultraviolet irradiation unit 10. The first vertical guide plate 80 and the second vertical guide plate 82 are arranged at the same position in the flow path direction. The first vertical guide plate 80 is disposed on the opposite side of the second vertical guide plate 82 across the central axis of the chamber 56. For example, the first vertical guide plate 80 is disposed above the central axis of the chamber 56, and the second vertical guide plate 82 is disposed below the central axis of the chamber 56. The first vertical guide plate 80 and the second vertical guide plate 82 are controlled to guide the fluid to be processed in an arbitrary direction. The first vertical guide plate 80 and the second vertical guide plate 82 are directed in different directions by the first vertical drive member 81 and the second vertical drive member 83, respectively.

  The first vertical guide plate 80 is inclined from the central axis of the chamber 56 so that the downstream end of the first vertical guide plate 80 faces the outside of the chamber 56. The first vertical guide plate 80 is controlled to guide the fluid to be processed flowing into the chamber 56 to the side wall of the closest chamber 56. For example, the first vertical guide plate 80 is controlled to guide the fluid to be processed upward.

  The second vertical guide plate 82 is inclined from the central axis of the chamber 56 so that the downstream end of the second vertical guide plate 82 faces the outside of the chamber 56. The second vertical guide plate 82 is inclined in a direction different from the inclination direction of the first vertical guide plate 80. The second vertical guide plate 82 is controlled to guide the fluid to be processed flowing into the chamber 56 to the side wall of the closest chamber 56. For example, the second vertical guide plate 82 is controlled to guide the fluid to be processed downward.

  The first horizontal guide plate set 76 includes a plurality of first horizontal guide plates 86 and a first horizontal drive member 87. The first horizontal driving member 87 simultaneously changes the directions of the plurality of first horizontal guide plates 86.

  The second horizontal guide plate set 78 includes a plurality of second horizontal guide plates 88 and a second horizontal drive member 89. The second horizontal drive member 89 simultaneously changes the directions of the plurality of second horizontal guide plates 88.

  The first horizontal guide plate 86 and the second horizontal guide plate 88 are disposed on the upstream side of the ultraviolet irradiation unit 10. The first horizontal guide plate 86 and the second horizontal guide plate 88 are disposed downstream of the first vertical guide plate 80 and the second vertical guide plate 82. The first horizontal guide plate 86 and the second horizontal guide plate 88 may be arranged upstream of the first vertical guide plate 80 and the second vertical guide plate 82. The first horizontal guide plate 86 and the second horizontal guide plate 88 are disposed at the same position in the flow path direction. The first horizontal guide plate 86 is disposed on the opposite side of the second horizontal guide plate 88 across the central axis of the chamber 56. For example, the first horizontal guide plate 86 is disposed to the left of the central axis of the chamber 56, and the second horizontal guide plate 88 is disposed to the right of the central axis of the chamber 56. The first horizontal guide plate 86 and the second horizontal guide plate 88 are controlled so as to guide the fluid to be processed in an arbitrary direction. The first horizontal guide plate 86 and the second horizontal guide plate 88 are directed in different directions by the first horizontal drive member 87 and the second horizontal drive member 89, respectively.

  The first horizontal guide plate 86 is inclined from the central axis of the chamber 56 so that the downstream end of the first horizontal guide plate 86 faces the outside of the chamber 56. The first horizontal guide plate 86 is controlled so as to guide the fluid to be processed flowing into the chamber 56 to the side wall of the closest chamber 56. For example, the first horizontal guide plate 86 is controlled to guide the fluid to be processed to the left.

  The second horizontal guide plate 88 is inclined from the central axis of the chamber 56 so that the downstream end of the second horizontal guide plate 88 faces the outside of the chamber 56. The second horizontal guide plate 88 is inclined in a direction different from the inclination direction of the first horizontal guide plate 86. The second horizontal guide plate 88 is controlled so as to guide the fluid to be processed flowing into the chamber 56 to the side wall of the closest chamber 56. For example, the second horizontal guide plate 88 is controlled to guide the fluid to be processed to the right.

  An example of each driving member 81, 83, 87, 89 is a driving motor that outputs a rotational driving force when electric power is supplied. Instead of the drive members 81, 83, 87, and 89, the user may manually operate.

In the ultraviolet irradiation device 150 of the third embodiment, the control device 70 converts the converted temperature T ₁ based on a preset relationship between the converted temperature T _{1... N} and the flow velocity u _{1. 1 ...} calculate the flow velocity u _{1 ... n} of the fluid to be treated flowing through the irradiation section 62 of the ultraviolet assigned to ultraviolet irradiation unit 22 corresponding to _n. The control device 70 controls the drive members 81, 83, 87, and 89 so that the variation in the calculated flow velocity u ₁ .

  Next, operation | movement of the ultraviolet irradiation device 150 of 3rd Embodiment is demonstrated.

  In the ultraviolet irradiation device 150, the fluid to be treated that has flowed from the fluid inlet 52 is adjusted by the guide plates 80, 82, 86, and 88 to flow into the chamber 56 after passing through the flow passage expanding portion 54. spread. Thereafter, as in the ultraviolet irradiation device 50 of the second embodiment, the fluid to be treated is treated with ultraviolet rays by the ultraviolet irradiation unit 22 of the ultraviolet irradiation unit 10 and the ultraviolet irradiation unit 22 of the ultraviolet irradiation unit 10 is cooled. Thereafter, the fluid is discharged from the treated fluid outlet 60.

  Also in the ultraviolet irradiation device 150 of the third embodiment, the control device 70 executes processing according to the flowcharts shown in FIGS. 11 and 12.

  FIG. 15 is a flowchart for explaining drive control processing of the drive members 81, 83, 87, and 89 by the control device 70 of the third embodiment. The control device 70 executes the drive control process shown in FIG. 15 by reading the drive control process program stored in the storage unit by the arithmetic processing unit. Note that the monitoring process of FIG. 15 may be executed in parallel with the processes of FIGS. 11 and 12, or may be executed at different timings.

As shown in FIG. 15, the control unit 70 includes a voltage V _{1 ... n} which is supplied to each of the ultraviolet irradiation unit 22 shown in FIG. 5, the flow velocity u _{1 ... n} of the reduced temperature T _{1 ... n} and the fluid to be treated based on the preset relationship, to calculate the flow velocity u _{1 ... n} of the fluid to be treated flowing through the irradiation section 62 of the ultraviolet assigned to each UV irradiation unit 22 corresponding to the reduced temperature T _{1 ... n} (S400) .

The control device 70 calculates the degree of variation σ of the flow velocity u _{1... N} based on the flow velocity u ₁ . For example, the control device 70, as variation degree σ of the flow velocity u _{1 ... n,} may be adopted the standard deviation of all the velocity u _{1 ... n.}

The control device 70 compares the variation degree σ of the flow velocity u _{1... N} with the predetermined threshold flow velocity THu (S420). The threshold flow velocity THu is a value for determining variations in the flow velocities u _{1... N} of the plurality of irradiation sections 62 in the chamber 56. Thus, variation degree σ of the flow velocity u _{1 ... n} is greater than the threshold flow rate THu, indicating that variation in the flow rate u _{1 ... n} is large.

When the variation degree σ of the flow velocity u _{1... N} is larger than the threshold flow velocity THu (S420: YES), the controller 70 drives the drive members 81, 83, and 87 so that the variation degree σ of the flow velocity u _1. , 89 are driven to adjust the flow velocity u _{1... N} of the irradiation section 62 in the chamber 56 (S430). When the driving members 81, 83, 87, 89 are driven manually, the control device 70 may notify the driving members 81, 83, 87, 89 to be driven and the driving direction by image or sound. .

When the variation degree σ of the flow velocity u _{1... N} is smaller than the threshold flow velocity THu (S420: NO), the control device 70 repeats step S400 and subsequent steps.

  Since the ultraviolet irradiation device 150 of the third embodiment includes the guide plates 80, 82, 86, and 88 for guiding the fluid to be processed in an arbitrary direction, the flow of the fluid to be processed can be appropriately controlled. In particular, in the ultraviolet irradiation device 150, the directions of the guide plates 80, 82, 86, and 88 can be changed in different directions by the driving members 81, 83, 87, and 89, so that the flow of the fluid to be processed can be controlled more appropriately. it can.

Further, when the variation of the flow velocity u _{1... N} is large, the control device 70 of the ultraviolet irradiation device 150 controls the direction of the guide plates 80, 82, 86, 88 so that the variation is small _. It is possible to irradiate the fluid to be treated with UV light more uniformly while suppressing variations in _n .

  The shape, number, arrangement, and the like of each configuration of the above-described embodiment may be changed as appropriate. Moreover, you may combine each embodiment.

  In the above-described embodiment, the driving member that uniformly changes the directions of the plurality of guide plates has been described as an example. However, driving members that individually change the directions of the guide plates may be provided. For example, the drive members 81, 83, 87, 89 may individually change the directions of the plurality of guide plates 80, 82, 86, 88.

The control device 70 determines whether the unit row has its own irradiation section 62 downstream of the irradiation section 62 of the one unit row in accordance with the inactivation rate S determined based on the ultraviolet intensity I _{1... N} of the one unit row. The ultraviolet intensity I _{1... N} may be controlled. For example, the control device 70 may control the ultraviolet intensity I _{1... N} of the third unit row according to the inactivation rate S determined based on the ultraviolet intensity I _1. Good. Specifically, when the inactivation rate converted from the ultraviolet intensity I _{1... N} by the ultraviolet irradiation unit 10 in the first unit row is not sufficient, the control device 70 detects the ultraviolet intensity I _{1. The} voltage may be controlled to increase _n . Thereby, the control apparatus 70 can control the voltage to the ultraviolet irradiation part 22 of the different unit row | line | column which irradiates an ultraviolet-ray to the same to-be-processed fluid more accurately and without waste.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  DESCRIPTION OF SYMBOLS 10 ... Ultraviolet irradiation unit, 12 ... Ultraviolet irradiation set, 14 ... Radiation set, 16 ... Ultraviolet sensor set, 20 ... Irradiation side base | substrate, 22 ... Ultraviolet irradiation part, 24 ... Irradiation side ultraviolet transmissive member, 25 ... Radiation part, 26 DESCRIPTION OF SYMBOLS ... Thermal conductive plate 28 ... Radiation fin, 30 ... Detection side base, 32 ... Ultraviolet sensor, 34 ... Light reception side ultraviolet transmissive member, 36 ... Irradiation side temperature sensor, 38 ... DC power supply, 40 ... Light reception side temperature sensor, 42 ... DC power source for sensor, 50 ... UV irradiation device, 56 ... chamber, 62 ... irradiation section, 64 ... heat dissipation region, 70 ... control device, 72 ... first vertical guide plate set, 74 ... second vertical guide plate set, 76 ... First horizontal guide plate set, 78 ... Second horizontal guide plate set, 80 ... First vertical guide plate, 81 ... First vertical drive member, 82 ... Second vertical guide plate, 83 ... Second droop Drive member 86 ... first horizontal guide plate, 87 ... first horizontal driving member, 88 ... second horizontal guide plate, 89 ... second horizontal drive member, 150 ... UV irradiation apparatus.

Claims (9)

Irradiation side base,
A plurality of ultraviolet irradiation units arranged on the irradiation side substrate at intervals, and irradiating ultraviolet rays to the fluid to be treated,
An irradiation-side ultraviolet transmitting member provided on the irradiation side of the plurality of ultraviolet irradiation units;
A plurality of heat dissipating parts each having a heat conducting plate provided on each of the plurality of ultraviolet irradiation parts and a heat dissipating fin provided on the heat conducting plate;
A detection base;
A plurality of ultraviolet detectors provided at positions facing each of the plurality of ultraviolet irradiation units on the detector-side base, detecting the ultraviolet rays, and outputting intensity information according to the intensity of the ultraviolet rays;
A detection-side ultraviolet transmission member provided on the detection side of the plurality of ultraviolet detection units;
Ultraviolet irradiation unit equipped with.   The ultraviolet irradiation unit according to claim 1, further comprising a plurality of temperature detection units provided individually in the plurality of ultraviolet irradiation units.   The ultraviolet irradiation unit according to claim 1, further comprising a plurality of direct current power sources individually connected to the plurality of ultraviolet irradiation units. The ultraviolet irradiation unit according to any one of claims 1 to 3,
Based on the ultraviolet intensity converted from the intensity information acquired from the plurality of ultraviolet detection units, a control device that determines the inactivation rate of the fluid to be treated by the ultraviolet rays irradiated by the ultraviolet irradiation unit;
An ultraviolet irradiation device comprising: The controller is
An ultraviolet ray intensity is converted from the intensity information acquired from the plurality of ultraviolet ray detection units, and the abnormality of the one ultraviolet ray irradiation unit is based on the ultraviolet ray intensity of one ultraviolet ray irradiation unit and the ultraviolet ray intensity of another ultraviolet ray irradiation unit. The ultraviolet irradiation device according to claim 4 which judges. The controller is
When the converted temperature corresponding to the temperature of the ultraviolet irradiation unit converted from the temperature information acquired from the plurality of temperature detection units is higher than a preset upper limit temperature, the voltage of the DC power supplied to the ultraviolet irradiation unit The ultraviolet irradiation device according to claim 4 or 5, wherein A plurality of the ultraviolet irradiation units;
An accommodating portion for accommodating the plurality of ultraviolet irradiation units;
With
The plurality of ultraviolet irradiation units include a first ultraviolet irradiation unit and a second ultraviolet irradiation unit,
A heat radiating part of the second ultraviolet irradiation unit disposed on the downstream side of the first ultraviolet irradiation unit on the downstream side of the region where the ultraviolet irradiation unit of the first ultraviolet irradiation unit irradiates the ultraviolet ray to the processing fluid. It is arrange | positioned. The ultraviolet irradiation device of any one of Claim 4 to 6. The plurality of ultraviolet irradiation units includes a third ultraviolet irradiation unit,
The region where the ultraviolet irradiation unit of the third ultraviolet irradiation unit irradiates the ultraviolet ray is located downstream of the region where the first ultraviolet irradiation unit irradiates the ultraviolet ray,
The controller is
The ultraviolet irradiation device according to claim 7, wherein the ultraviolet intensity of the third ultraviolet irradiation unit is controlled according to an inactivation rate determined based on the ultraviolet intensity of the first ultraviolet irradiation unit.   The ultraviolet irradiation device according to claim 7 or 8, further comprising a plurality of guide members arranged in the housing portion and upstream of the plurality of ultraviolet irradiation units to guide the fluid to be processed.

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