WO2024018845A1 - 流体殺菌装置 - Google Patents

流体殺菌装置 Download PDF

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Publication number
WO2024018845A1
WO2024018845A1 PCT/JP2023/023598 JP2023023598W WO2024018845A1 WO 2024018845 A1 WO2024018845 A1 WO 2024018845A1 JP 2023023598 W JP2023023598 W JP 2023023598W WO 2024018845 A1 WO2024018845 A1 WO 2024018845A1
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WO
WIPO (PCT)
Prior art keywords
fluid
axial direction
light source
housing
flow path
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2023/023598
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
英明 田中
裕幸 加藤
和久 新野
和亮 川崎
諒 佐野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stanley Electric Co Ltd
Original Assignee
Stanley Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stanley Electric Co Ltd filed Critical Stanley Electric Co Ltd
Priority to CN202380054045.4A priority Critical patent/CN119562835A/zh
Priority to EP23842776.9A priority patent/EP4529931A4/en
Priority to US18/876,666 priority patent/US20250361159A1/en
Publication of WO2024018845A1 publication Critical patent/WO2024018845A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/30—Treatment of water, waste water, or sewage by irradiation
    • C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
    • C02F1/325—Irradiation devices or lamp constructions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Disinfection or sterilisation of materials or objects, in general; Accessories therefor
    • A61L2/02—Disinfection or sterilisation of materials or objects, in general; Accessories therefor using physical processes
    • A61L2/08—Radiation
    • A61L2/10—Ultraviolet [UV] radiation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10—Apparatus features
    • A61L2202/12—Apparatus for isolating biocidal substances from the environment
    • A61L2202/122—Chambers for sterilisation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L9/00—Disinfection, sterilisation or deodorisation of air
    • A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
    • A61L9/18—Radiation
    • A61L9/20—Ultraviolet radiation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/02—Non-contaminated water, e.g. for industrial water supply
    • C02F2103/023—Water in cooling circuits
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/003—Coaxial constructions, e.g. a cartridge located coaxially within another
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/004—Seals, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/322—Lamp arrangement
    • C02F2201/3222—Units using UV-light emitting diodes [LED]
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/322—Lamp arrangement
    • C02F2201/3227—Units with two or more lamps
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/322—Lamp arrangement
    • C02F2201/3228—Units having reflectors, e.g. coatings, baffles, plates, mirrors
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/32—Details relating to UV-irradiation devices
    • C02F2201/328—Having flow diverters (baffles)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/02—Fluid flow conditions
    • C02F2301/022—Laminar
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00—Specific treatment goals
    • C02F2303/04—Disinfection
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/10—Location of water treatment or water treatment device as part of a potable water dispenser, e.g. for use in homes or offices
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2307/00—Location of water treatment or water treatment device
    • C02F2307/12—Location of water treatment or water treatment device as part of household appliances such as dishwashers, laundry washing machines or vacuum cleaners

Definitions

  • the present invention relates to a fluid sterilizer that sterilizes a fluid by irradiating the fluid with ultraviolet rays.
  • the fluid sterilizer can be assembled easily by inserting and storing components such as flow pipes and light sources from the opening side of the housing as storage parts, and tightening them from the opening side.
  • the arrangement space can be saved and downsizing can be achieved.
  • the channel tube is made of a material with excellent ultraviolet resistance such as PTFE (polytetrafluoroethylene tetrafluoroethylene resin)
  • the housing is made of a rigid material.
  • resins with high and low cost are used.
  • the outlet When the outlet is provided at the other end of the flow pipe, that is, at the end on the light source side, the intensity of ultraviolet rays near the outlet is high, and the casing protects the UV light leaking from the outlet to the outside of the flow pipe. There is a problem that it easily deteriorates due to the
  • Patent Documents 1 and 2 do not have a structure in which the flow pipe is housed in the housing along with other parts such as a light source to streamline assembly; There is no problem of deterioration due to ultraviolet rays leaking outside from the outlet.
  • An object of the present invention is to provide a fluid sterilization device that can effectively prevent deterioration of the casing due to ultraviolet rays leaking out from the outlet of a flow pipe.
  • the present invention A fluid sterilizer that sterilizes liquid, a casing having one end and the other end coaxially on a straight axis;
  • the housing includes a first cylindrical portion on the one end side and a second cylindrical portion on the other end side having an inner diameter larger than the first cylindrical portion,
  • the fluid to be sterilized is axially inserted into the first cylindrical portion of the housing so that the fluid to be sterilized flows in one direction from the one end side to the other end side, and from the opening at the other end side to the one end side.
  • a flow pipe having a notch extending a predetermined length in the axial direction; an opening closing member provided in the second cylindrical portion of the casing, having an ultraviolet transmitting portion and closing the opening of the flow path pipe; a light source that irradiates ultraviolet rays from the other end in the axial direction into the flow pipe through the ultraviolet transmitting portion of the opening closing member; It is provided in the second cylindrical part of the casing, has higher ultraviolet resistance than the casing, is arranged on the outer peripheral side of the flow path pipe, and is a flow path for leading out the fluid to be sterilized from the notch. a shielding member defining an upstream end and shielding an inner peripheral side of the casing from ultraviolet light emitted from the notch of the flow path pipe; It is equipped with
  • a shielding member having higher resistance to ultraviolet rays than the casing is provided in the irradiation range of the ultraviolet rays leaking outside from the notch at the other end of the flow path pipe, and the shielding member having higher resistance to ultraviolet rays than the casing is provided. to shield.
  • FIG. 2 is a longitudinal cross-sectional view of the fluid sterilization device.
  • FIG. 2 is an exploded perspective view illustrating storage components housed in the cylindrical portion of the housing body in an axial direction of the fluid sterilization device. It is an exploded perspective view of a light source device and an outerlet disassembled in an axial direction, and seen from one end side in an axial direction. It is an exploded perspective view of a light source device and an outerlet disassembled in an axial direction, and seen from the other end side in an axial direction.
  • FIG. 2 is an enlarged view of a range including an enlarged diameter portion and an outer cover in the axial direction in FIG. 1 .
  • FIG. 5A is an enlarged view of the upper half with respect to the central axis Rx in FIG.
  • FIG. 2 is a diagram illustrating a simulation analysis of the UV illuminance distribution in the fluid sterilization device, with the upper limit of the illuminance distribution set at 40 mw/cm 2 .
  • FIG. 2 is a diagram illustrating a simulation analysis of the UV illuminance distribution in the fluid sterilizer with the upper limit of the illuminance distribution being 10 mw/cm 2 .
  • FIG. 2 is a diagram illustrating a simulation analysis of the UV illumination distribution in the fluid sterilizer, with the upper limit of the illumination distribution set at 5 mw/cm 2 .
  • FIG. 1 is a longitudinal cross-sectional view of a fluid sterilization device 10. As shown in FIG. Rx indicates the central axis of the fluid sterilizer 10.
  • the fluid sterilizer 10 has a cylindrical housing body 12 and a cap-shaped outer cover 14.
  • the housing body 12 and the outer cover 14 constitute the housing of the fluid sterilizer 10, and are screwed together at the respective male threaded portions 121 and female threaded portions 141 with their central axes aligned with the central axis Rx of the fluid sterilizer 10.
  • the screwing of the male threaded portion 121 and the female threaded portion 141 simplifies the assembly structure of the stored components by tightening the stored components in the housing in the axial direction.
  • the housing body 12 has a cylindrical portion 122, an inlet 123, an enlarged diameter portion 124, and a stopper portion 125.
  • the inlet 123 protrudes from one axial end of the cylindrical portion 122 toward the one end along the central axis Rx by a predetermined length.
  • the stopper portion 125 is formed as an inner surface on one end side in the axial direction of the cylindrical portion 122, and an inlet passage of the inlet 123 is opened at the center thereof.
  • the stopper portion 125 has a role of preventing the components stored in the cylindrical portion 122 from moving toward one end in the axial direction.
  • the enlarged diameter portion 124 protrudes radially from the cylindrical portion 122 at one end and is open at the other end.
  • the outer cover 14 has an opening 142 at the center of the cover portion.
  • the outer cover 14 prevents the stored components from detaching from the housing body 12 by a cover portion defining a circular opening 142 in the center, and after screwing together with the housing body 12, the stored components are held by a stopper. It has the role of pressing toward the portion 125.
  • FIG. 2 is an exploded perspective view showing the components housed in the cylindrical portion 122 of the casing body 12 in an axial direction of the fluid sterilizer 10.
  • the stored components include a shield 15, a rectifying plate 16, and a straight pipe 18, whose central axes are aligned with the central axis Rx of the housing, and are arranged in that order from one end to the other end. , are inserted from the opening side of the other end of the housing body 12.
  • the shielding body 15, together with the rectifying plate 16 and the straight pipe 18, is made of a material that is resistant to ultraviolet rays.
  • the shielding body 15 has one end placed against the inner surface of the stopper section 125 and shields the inner surface of the stopper section 125 from UV (ultraviolet rays), thereby protecting the stopper section 125 from UV.
  • the shield 15 also has a tapered portion 151 on the inner circumferential side.
  • the tapered portion 151 has a diameter equal to the inner diameter of the inlet 123 and the straight pipe 18 on the small diameter side and the large diameter side, respectively, and communicates with the inlet 123 and the sterilization chamber 182, respectively.
  • the rectifying plate 16 has a plurality of rectifying holes 162 in a peripheral portion surrounding a central portion 161.
  • the central portion 161 functions to dam the fluid to be sterilized (eg, water) flowing into the current plate 16 via the inlet 123 and the shield 15 from a pressure pump (not shown). That is, the fluid to be sterilized hits the central portion 161 and is decelerated, and then flows into the straight pipe 18 from the rectifying hole 162. Thereby, the flow velocity of the fluid to be sterilized is made uniform between the radially inner and outer sides of the sterilization chamber 182.
  • the inlet of the shield 15 (the minimum diameter portion of the tapered portion 151) and the center portion 161 of the current plate 16 on the central axis Rx axis, UV emitted from the straight pipe 18 toward the current plate. is prevented from leaking from the fluid sterilizer 10.
  • the area of the central portion 161 is greater than or equal to the area of the inlet of the shield 15.
  • the straight pipe 18 defines a sterilization chamber 182 on the inner peripheral side.
  • the plurality of notches 181 are formed at equal angular intervals in the circumferential direction on the peripheral wall of the straight pipe 18 on the other end side in the axial direction, and extend a predetermined length from the opening at the other end of the straight pipe 18 toward the one end side.
  • the O-ring 183 is fitted into an annular groove on the outer periphery of the straight pipe 18 to prevent leakage of the fluid to be sterilized at the outer periphery.
  • FIG. 3 and 4 are exploded perspective views of the light source device 19 and the housing sealing member 32, viewed from one end and the other end in the axial direction, respectively.
  • 5A is an enlarged view of the range including the enlarged diameter portion 124 and the outer cover 14 in the axial direction in FIG. 1
  • FIG. 5B is an enlarged view of the upper half with respect to the central axis Rx in FIG. 5A.
  • the light source device 19 and the housing sealing member 32 are housed in the enlarged diameter portion 124 with one end and the other end aligned, respectively, and with their central axes aligned with the central axis Rx.
  • the light source device 19 is disassembled into a shielding ring 20, an O-ring 191, a quartz glass 22, a reflector 24, a UV-LED 26, a substrate 28, and a heat radiation cover 30 in order from one end to the other end in the axial direction.
  • the side from which UV is emitted and the side opposite thereto will be referred to as the front side and the back side, respectively.
  • the light source device 19 has its front side and back side facing toward one end and the other end in the axial direction of the fluid sterilizer 10, respectively.
  • the O-ring 191 is fitted between the periphery of the quartz glass 22 and the annular step on the surface side of the reflector 24 to provide a seal.
  • the quartz glass 22 and the O-ring 191 constitute an opening closing member that closes the opening on the other end side of the straight pipe 18 as a flow path pipe.
  • the reflector 24, together with the shielding ring 20, is made of a material that is resistant to ultraviolet rays.
  • the reflector 24 has a reflective surface 241, a projecting surface 242, a peripheral surface 243, and a recess 244.
  • the reflective surface 241 is formed in a tapered shape that gradually increases in diameter from the back side toward the front side on the inner peripheral side of the reflector 24 .
  • the projecting surface 242 projects radially outward from the periphery of the reflective surface 241 .
  • the peripheral surface 243 is formed in the shape of a cylindrical side surface and extends from the radially outer end of the overhanging surface 242 toward the other axial end.
  • the recess 244 is formed to open at the periphery of the back surface of the reflector 24 .
  • the reflector 24 On the back side (FIG. 4), the reflector 24 has a circumferential end surface 247 and an annular stepped portion 248 that is recessed inward along the inner periphery of the circumferential end surface 247.
  • a plurality of (two in the illustrated example) UV-LEDs 26 and a plurality of electrical components 27 are mounted at the center and peripheral portions of the front surface of the board 28, respectively.
  • the UV-LED 26 is exposed from the back side of the reflector 24 into a tapered reflective surface 241, and the electrical component 27 is housed in a recess 244 on the back side of the reflector 24.
  • a pair of opposing recesses 281 and a pair of recesses 282 are formed at the periphery of the circular substrate 28 .
  • the UV emitted by the UV-LED 26 belongs to deep ultraviolet light, which is highly effective in sterilizing fluids, and has a wavelength range of, for example, 100 to 400 nm. Particularly, in the ultraviolet wavelength range, UVC with a wavelength of 100 to 280 nm is particularly preferable because it has a particularly high bactericidal effect.
  • the heat dissipation cover 30 is made of metal and has a cylindrical portion 301 on the back side.
  • a harness (not shown), which is wiring for connecting the electrical component 27 of the board 28, is inserted into the cylindrical portion 301.
  • the pair of protrusions 302 are formed on the front surface of the heat dissipation cover 30 and fit into the pair of recesses 282 in the substrate 28 .
  • the O-ring 192 (FIG. 5A) is fitted between the inner periphery of the heat dissipation cover 30 and the outer periphery of the annular stepped portion on the other axial end side of the circumferential surface 243.
  • the housing sealing member 32 has a plurality of spacers 320 formed on the inner surface at equal angular intervals in the circumferential direction, and a raised top surface of the spacer 320 that is spaced 180 degrees apart in the circumferential direction. It has a convex portion 321.
  • the arcuate protruding edge 324 fits on the outside of the circumferential surface 243 of the reflector 24 .
  • the harness hole 322 passes through the housing sealing member 32 in the axial direction.
  • a cylindrical portion 301 having an O-ring 193 fitted around the circumference is fitted into the harness hole 322 .
  • the convex portion 321 is formed to share parts with another type of fluid sterilizer, and can be omitted in this fluid sterilizer 10. This is because positioning of the heat dissipation cover 30 and the housing sealing member 32 in the circumferential direction is achieved by fitting the cylindrical portion 301 and the harness hole 322.
  • the housing sealing member 32 has a sealing part 325 and an outlet 326 protruding from the sealing part 325 toward the other end in the axial direction along the central axis Rx on the back surface side.
  • the outlet 326 passes through the inner peripheral side of the opening 142 of the outer cover 14 and reaches the outside of the outer cover 14 at its protruding end.
  • the shielding ring 20 has an annular end surface on one end in the axial direction fitted to the inner periphery of the enlarged diameter portion 124 using an O-ring 196.
  • the shielding ring 20 has a cylindrical side surface portion 202 and a tapered portion 201 on the inner peripheral side of one end and the other end in the axial direction, respectively.
  • Fn indicates the flow of the fluid to be sterilized in the fluid sterilizer 10.
  • the outlet flow path 35 serves as a passage for guiding the fluid to be sterilized, which is led out from the notch 181 of the straight pipe 18 in the radial direction, to the outside of the fluid sterilizer 10, and is connected to the light source device 19 in the fluid sterilizer 10, It is formed in a space between the tapered portion 201 of the shielding ring 20, the enlarged diameter portion 124, or the inner surface of the sealing portion 325 of the housing sealing member 32.
  • the outlet channel 35 includes a first channel section 351, a second channel section 352, a third channel section 353, a fourth channel section 354, and a fifth channel section 355 in order in the flow direction of the fluid to be sterilized. have.
  • the first flow path section 351, the second flow path section 352, and the third flow path section 353 all have an annular shape when viewed in the axial direction.
  • the fourth flow path portion 354 and the fifth flow path portion 355 have a circular shape when viewed in the axial direction.
  • the first flow path portion 351 is formed in a space sandwiched between the tapered portion 201 and the overhanging surface 242 in the axial direction, and serves as the most upstream portion of the outlet flow path 35 for the fluid to be sterilized immediately after being led out from the notch 181. to the downstream side.
  • the second flow path portion 352 is formed as a passage portion between the corner portion of the boundary between the overhanging surface 242 and the peripheral surface 243 and the tapered portion 201 .
  • the third flow path portion 353 is formed in an annular shape between the enlarged diameter portion 124 and the peripheral surface 243.
  • the fourth flow path portion 354 is formed as an axial gap between the back surface of the light source device 19 and the inner surface of the housing sealing member 32.
  • housing casing body 12 and outer cover 14
  • Engineering plastic such as PC (polycarbonate) or POM (polyacetal)
  • heat dissipation cover 30 PTFE (polytetrafluoroethylene tetrafluoroethylene resin), PFA (perfluoroalkoxyalkane), PVF (polyvinyl fluoride), PVDF (polyvinylidene fluoride), etc.
  • metal polytetrafluoroethylene tetrafluoroethylene resin
  • PFA perfluoroalkoxyalkane
  • PVF polyvinyl fluoride
  • PVDF polyvinylidene fluoride
  • the material (b) above is selected as having higher UV resistance and UV reflectance than the material (a) above.
  • the material (a) is selected as a material with higher corrosion resistance to the fluid to be sterilized than metal.
  • the reason why the material (b) above was selected for the shielding body 15 and the shielding ring 20 is that the shielding body 15 and the shielding ring 20 are made of PTFE that has been lightly processed, so they can be manufactured using simple processing. This is to make it a material that can be used.
  • the fluid to be sterilized is pumped to the fluid sterilizer 10 from a pressure pump (not shown), passes through the inlet 123 of the housing body 12, the tapered portion 151 of the shield 15, and the rectifying hole 162 of the rectifying plate 16, and enters the sterilizing chamber of the straight pipe 18. 182.
  • the reason why the rectifying plate 16 has a central portion 161 without a through hole is that the fluid to be sterilized is rectified by the rectifying holes 162 of the rectifying plate 16, and the flow velocity in the sterilizing chamber 182 is controlled by the diameter of the sterilizing chamber 182. This is to make the flow velocity uniform at the directional position.
  • the UV-LED 26 emits UV toward the quartz glass 22 in the axial direction of the light source device 19.
  • the ultraviolet rays that spread in the radial direction and are irradiated onto the reflective surface 241 are reflected by the reflective surface 241 and reflected toward the central axis Rx.
  • the ultraviolet light passes through the quartz glass 22 and is irradiated onto the fluid to be sterilized in the sterilization chamber 182 . Thereby, the fluid to be sterilized is sterilized.
  • the fluid to be sterilized changes its direction from the axial direction of the straight pipe 18 to the outward radial direction, and exits the straight pipe 18 through the notch 181. Since the total flow cross-sectional area of the plurality of notches 181 is smaller than the flow cross-sectional area of the sterilization chamber 182, the flow rate of the fluid to be sterilized increases in the notches 181. The flow velocity of the fluid to be sterilized is further increased by the tapered portion 201.
  • the fluid sterilizer 10 is placed horizontally (the longitudinal direction is aligned horizontally), but for example, the fluid sterilizer 10 is placed vertically (the longitudinal direction is aligned vertically) with the inlet 123 and outlet 326 facing down and up, respectively. It is possible to use it by aligning it in the same direction.
  • equipment such as a water server equipped with the fluid sterilizer 10
  • the operation of the pressure pump is also stopped, and air remains in the upper portion of the straight pipe 18.
  • this residual air is immediately discharged to the outside when the pressure pump starts operating next time. This is because air weakens the intensity of UV light.
  • the flow rate of the fluid to be sterilized increases at the notch 181, so in the fluid sterilizer 10, the air remaining above the straight pipe 18, that is, at the height of the notch 181, remains for a long time.
  • the fluid to be sterilized is quickly and smoothly discharged out of the straight pipe 18 by the increased speed of the fluid to be sterilized.
  • UV rays emitted from the quartz glass 22 to the sterilization chamber 182 those that have largely spread outward in the radial direction are emitted from the notch 181 to the outside of the straight pipe 18.
  • the UV that has entered the notch 181 from the inner peripheral side of the straight pipe 18 will also be referred to as “external leakage UV.”
  • the entire amount of external leakage UV irradiates the taper portion 201 of the shielding ring 20 and is reflected inward in the radial direction, or is reflected to the cylindrical side surface portion 202 through a part of one end side of the notch 181.
  • the light immediately returns to the straight pipe 18, and the remaining light is irradiated onto the tapered portion 201 of the shielding ring 20 and reflected.
  • the fluid to be sterilized passes through the second flow path section 352 sandwiched between the taper section 201 and the corner section of the reflector 24.
  • the external leakage UV irradiated onto the tapered part 201 is reflected by the tapered part 201 and then reflected to (a) the notch 181 in the peripheral wall of the other end of the straight pipe 18 in the axial direction, and (b) the straight pipe.
  • the peripheral wall at the other end in the axial direction of 18 is divided into three parts: a part where the notch 181 is not formed, and (c) an overhanging surface 242.
  • the reflected destination (a) passes through the notch 181 and returns into the straight pipe 18, contributing to re-sterilization of the fluid to be sterilized in the sterilization chamber 182.
  • those whose reflection destinations are (b) and (c) are reflected again at the reflection destination, and are repeatedly reflected between the taper part 201 and the reflector 24 until the intensity is sufficiently weakened. This contributes to sterilization of the fluid to be sterilized in the first flow path section 351 and the second flow path section 352.
  • the tapered part 201 allows external leakage UV to be reflected alternately and repeatedly by the taper part 201 and the reflector 24, so that it does not escape to the third flow path part 353 on the downstream side of the second flow path part 352.
  • the taper angle value or contour shape is set so that it remains in the second flow path section 352 or finally returns to the sterilization chamber 182 via the notch 181.
  • the fluid to be sterilized flows in the annular third flow path section 353 between the circumferential surface 243 of the reflector 24 and the inner circumferential surface of the enlarged diameter section 124 in the axial direction, and further , after that, it hits the inner surface of the sealing part 325 and changes the traveling direction to the inside in the radial direction.
  • the light flows around the fourth flow path section 354 on the back side of the light source device 19 and gathers at the opening on one end side of the outlet 326 as the center in the radial direction along the inner surface of the blocking section 325.
  • the fourth flow path portion 354 is formed as a gap sandwiched between the back surface of the light source device 19 and the sealing portion 325 of the housing sealing member 32 in the axial direction.
  • the fluid to be sterilized contacts the back surface of the heat radiation cover 30 of the light source device 19 in the fourth flow path section 354 and cools the heat radiation cover 30. Since the heat generated by the UV-LEDs 26 is conducted to the substrate 28 and further to the metal heat-radiating cover 30, the cooling of the heat-radiating cover 30 by the fluid to be sterilized in the fourth flow path section 354 is effective for cooling the UV-LEDs 26. Contribute.
  • the notch 181 and the tapered portion 201 increase the flow velocity of the fluid to be sterilized, thereby improving the cooling performance of the heat dissipation cover 30.
  • the board 28 is also called a metal board, and the mounting area for components that require heat dissipation is made of metal, and has a structure that increases thermal conductivity to the back side.
  • the fluid to be sterilized then flows out of the fluid sterilizer 10 through the fifth flow path section 355.
  • FIG. 6 is a perspective view of a reflector 24b of a modified example.
  • the reflector 24b is different from the reflector 24 (FIGS. 3 and 4) in that the projecting surface 242 is not perpendicular to the central axis but is formed in a tapered shape that matches the shape of the tapered portion 201, and that Grooves 245 are formed on the tapered projecting surface 242 at equal angular intervals in the circumferential direction.
  • the distance between the projecting surface 242 of the reflector 24b and the tapered portion 201 can be prevented from becoming locally smaller than that of the projecting surface 242 of the reflector 24.
  • the groove 245 can ensure a sufficient flow cross-sectional area of the first flow path section 351.
  • FIGS. 7 to 9 are diagrams in which the UV illuminance distribution in the fluid sterilization device 10 is analyzed by simulation.
  • the emission intensity (luminance) of the UV emitted from the UV-LED 26 is kept the same.
  • the upper limits of the illuminance distribution analysis are 40 mw/cm 2 , 10 mw/cm 2 and 5 mw/cm 2 , respectively. Therefore, in each illuminance distribution map, positions with illuminance above the upper limit uniformly belong to the region of the highest stage. The simulation was performed using ASAP from Breault Research Organization.
  • the upper limit illuminance Lu is divided into four equal parts, and each position is shown to which stage of the four illuminance stages it belongs. That is, if the illuminance is L, the first illuminance stage is 0. ⁇ L ⁇ Lu/4, the second illuminance stage is Lu/4 ⁇ L ⁇ Lu/2, the third illuminance stage is Lu/2 ⁇ L ⁇ 3 ⁇ Lu/4, the fourth illuminance step is 3 ⁇ Lu /4 ⁇ L.
  • the vicinity of the emission of the UV-LED 26 has a strong illuminance of 30 mw/cm 2 or more, and that there is an illuminance region of 10 mw/cm 2 to 20 mw on the outer peripheral side of the notch 181.
  • the radially inner portion of the tapered portion 201 and the shield 15 have an illuminance range of 2.5 mw/cm 2 to 5.0 mw, and from FIG. 9, the maximum diameter side of the tapered portion 201 is 1.25 mw/cm 2 -5.0 mw. It can be seen that the illuminance range is from cm 2 to 2.5 mw.
  • the fluid sterilizer 10 water is used as the fluid to be sterilized.
  • the fluid to be sterilized may be a liquid other than water.
  • the fluid sterilization device 10 is equipped with two UV-LEDs 26 as light sources that emit UV.
  • the number of light sources that emit UV light may be one, or three or more.
  • quartz glass 22 is used as the ultraviolet transmitting section.
  • the ultraviolet transmitting portion of the present invention may be made of a material other than quartz glass 22 as long as it transmits ultraviolet light and has corrosion resistance against the fluid to be sterilized.
  • the cylindrical portion 122 and the enlarged diameter portion 124 of the fluid sterilization device 10 correspond to a first cylindrical portion and a second cylindrical portion of the present invention, respectively, and accommodate a straight pipe 18 as a flow path pipe and a light source device 19, respectively.
  • the shielding ring 20 is fitted over the end of the straight pipe 18 on the notch 181 side at the enlarged diameter portion 124 .
  • the tapered part 201 of the shielding ring 20 forms a passage in the enlarged diameter part 124 for the fluid to be sterilized which is led out from the notch 181 as an outlet of the straight pipe 18, and also forms a discharge passage for the fluid to be sterilized which is led out from the notch 181 as an outlet of the straight pipe 18.
  • the enlarged diameter portion 124 is protected from the ultraviolet rays leaked outside the tube 18.
  • Examples of fluids to be sterilized by the fluid sterilizer 10 include water stored in a water storage tank of an ice maker, water conveyed through a water pipe or water heater, drinking water in a water server, cooling water in a circulation device (chiller), and a drink server. There are drinking liquids.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Toxicology (AREA)
  • Epidemiology (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Physical Water Treatments (AREA)
PCT/JP2023/023598 2022-07-22 2023-06-26 流体殺菌装置 Ceased WO2024018845A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202380054045.4A CN119562835A (zh) 2022-07-22 2023-06-26 流体杀菌装置
EP23842776.9A EP4529931A4 (en) 2022-07-22 2023-06-26 FLUID STERILIZATION DEVICE
US18/876,666 US20250361159A1 (en) 2022-07-22 2023-06-26 Fluid sterilization device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2022-117218 2022-07-22
JP2022117218A JP2024014411A (ja) 2022-07-22 2022-07-22 流体殺菌装置

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WO2025239030A1 (ja) * 2024-05-16 2025-11-20 三浦工業株式会社 流体殺菌装置

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JP2025164480A (ja) * 2024-04-19 2025-10-30 スタンレー電気株式会社 流体除菌装置

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JP2018202205A (ja) 2018-09-12 2018-12-27 日機装株式会社 流体殺菌装置
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JP2019154885A (ja) * 2018-03-15 2019-09-19 東芝ライテック株式会社 流体殺菌装置
JP2020022943A (ja) * 2018-08-08 2020-02-13 株式会社Ｕｓｋテクノロジー 流体殺菌装置
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CN119562835A (zh) 2025-03-04
EP4529931A4 (en) 2025-08-20
US20250361159A1 (en) 2025-11-27
EP4529931A1 (en) 2025-04-02
JP2024014411A (ja) 2024-02-01

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