WO2014068913A1 - 紫外線殺菌装置及び殺菌方法 - Google Patents
紫外線殺菌装置及び殺菌方法 Download PDFInfo
- Publication number
- WO2014068913A1 WO2014068913A1 PCT/JP2013/006284 JP2013006284W WO2014068913A1 WO 2014068913 A1 WO2014068913 A1 WO 2014068913A1 JP 2013006284 W JP2013006284 W JP 2013006284W WO 2014068913 A1 WO2014068913 A1 WO 2014068913A1
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- WO
- WIPO (PCT)
- Prior art keywords
- ultraviolet
- ultraviolet light
- light emitting
- sterilized
- irradiated
- Prior art date
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- 230000001954 sterilising effect Effects 0.000 title claims abstract description 47
- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 27
- 238000000034 method Methods 0.000 title claims description 4
- 230000001678 irradiating effect Effects 0.000 claims abstract description 9
- 230000000844 anti-bacterial effect Effects 0.000 claims description 12
- 239000012530 fluid Substances 0.000 claims description 8
- 230000003287 optical effect Effects 0.000 claims description 8
- 238000002834 transmittance Methods 0.000 claims description 8
- 230000007246 mechanism Effects 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 3
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract description 5
- 229910052753 mercury Inorganic materials 0.000 abstract description 4
- 239000012780 transparent material Substances 0.000 abstract 1
- 239000000758 substrate Substances 0.000 description 13
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 6
- 239000002826 coolant Substances 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- 239000010453 quartz Substances 0.000 description 5
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 4
- 230000002070 germicidal effect Effects 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 3
- 229910052594 sapphire Inorganic materials 0.000 description 3
- 239000010980 sapphire Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000000395 magnesium oxide Substances 0.000 description 2
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 239000000565 sealant Substances 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000008267 milk Substances 0.000 description 1
- 210000004080 milk Anatomy 0.000 description 1
- 235000013336 milk Nutrition 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- -1 platinum group metals Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
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- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 235000019992 sake Nutrition 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
Images
Classifications
-
- 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—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
- A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
- A61L2/08—Radiation
- A61L2/10—Ultraviolet radiation
-
- 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
Definitions
- the present invention relates to a novel ultraviolet sterilization apparatus and sterilization method.
- a low-pressure mercury lamp that emits light having a wavelength of 253.7 nm (mercury resonance line) generated by discharge of mercury vapor at a low pressure (about 0.1 Pa).
- the sterilizing lamp is widely used in kitchens, hospitals, pharmaceutical factories, etc. for sterilizing water, powder, containers and the like.
- ultraviolet sterilizers have been developed in which deep ultraviolet light emitting diodes (hereinafter also referred to as deep ultraviolet LEDs), which have a longer life and lower power consumption than mercury lamps, are modularized and used as light sources. .
- a plurality of deep ultraviolet rays are provided on the surface inside a treatment tank having an inflow portion and an outflow portion of the object to be processed.
- the rear surface of the first heat transfer plate and the second heat transfer plate each having a protective cover that covers the deep ultraviolet LED in a watertight state while arranging the LEDs is connected to the deep ultraviolet LED and the second heat transfer plate of the first heat transfer plate.
- a light source is installed at a position sandwiched between flow paths made of quartz glass that is bent, and the flow through the flow path.
- An apparatus in which a light source is cooled by a sterilized body is known (see Patent Document 2).
- Patent Document 1 In addition, in order to lengthen the irradiation time per unit amount of the sterilized body, the apparatus shown in Patent Document 1 needs to increase the number of modules installed in the treatment tank, as shown in Patent Document 2. In the apparatus, it was necessary to lengthen the flow path length.
- a deep ultraviolet LED is arranged so that the internal space can be used more effectively, and combined with a condensing device that effectively condenses the deep ultraviolet emitted from the light source. It solves the above problems.
- the present invention includes a flow path through which a body to be sterilized, which is composed of a fluid and has a sterilizing action and is permeable to ultraviolet light, is disposed outside the flow path, and is sterilized.
- a UV light sterilizer that sterilizes by irradiating the UV light emitted from the light source onto the sterilized body that circulates in the flow path, the light source comprising: It comprises a plurality of “ultraviolet light emitting elements that emit ultraviolet light having a bactericidal action”, further includes a light collecting device that collects the ultraviolet light emitted from each ultraviolet light emitting element, and the light collected by the light collecting device. It is an ultraviolet sterilizer characterized by irradiating the sterilized body with ultraviolet rays.
- the apparatus of the present invention preferably has a mechanism for generating a turbulent flow in the flow path.
- a plurality of “ultraviolet light emitting elements emitting ultraviolet light having a bactericidal action” are provided on the side surface of a cylindrical or polygonal column base, and the optical axis of each ultraviolet light emitting element is the base of the base.
- a light source composed of an ultraviolet light emitting module arranged so as to pass through the central axis so that the ultraviolet light is emitted radially with respect to the central axis, and a collection comprising an elliptical reflecting mirror or a parabolic reflecting mirror.
- An ultraviolet light emitting module arranged on a focal axis of the elliptical reflecting mirror or parabolic reflecting mirror, and condensing and emitting the ultraviolet rays emitted radially from the ultraviolet emitting module. It is preferable that the sterilized body is irradiated with the collected ultraviolet ray emitted from the condensed ultraviolet ray emission unit.
- the apparatus has a plurality of the condensed ultraviolet ray emitting units, and these condensed ultraviolet ray emitting units are arranged around the flow path and are condensed on the sterilized body from multiple directions. It is particularly preferable to irradiate the ultraviolet rays.
- the apparatus of the present invention is the percentage of the ratio of the transmitted ultraviolet light intensity to the irradiated ultraviolet light intensity when irradiated with ultraviolet light having a bactericidal effect on a 1 cm thick irradiated object ⁇ (transmitted ultraviolet light intensity / irradiated ultraviolet light intensity) ⁇ 100 (%) ⁇ Is preferably a sterilizing apparatus for sterilizing an object to be sterilized having an ultraviolet transmittance of 50% or less.
- a light source comprising a plurality of “ultraviolet light emitting elements (deep ultraviolet light emitting elements) that emit germicidal ultraviolet light (deep ultraviolet light)” and the ultraviolet light emitted from each ultraviolet light emitting element are collected.
- a light condensing device By using in combination with a light condensing device, it is possible to irradiate an object to be sterilized with deep ultraviolet light that has been strengthened by condensing, so that sterilization can be performed efficiently.
- the object to be sterilized circulates in the flow path, and the light source and the light collecting device are disposed outside the flow path, so that maintenance of the apparatus is easy.
- an object to be sterilized is sterilized with an ultraviolet transmittance as low as 50% or less according to the above definition, and ultraviolet rays irradiated from the outside of the channel flow through the center of the channel. Even if it is difficult to reach the flow path, by providing a mechanism for generating turbulent flow inside the flow path, the sterilized body flowing through the central portion flows near the flow path wall surface due to turbulent flow. If the length of the region is appropriate, the object to be sterilized can be uniformly irradiated with ultraviolet rays, and sterilization can be reliably performed.
- the irradiation region has a long rectangular shape, and the irradiation region
- the apparatus can be made compact because ultraviolet irradiation can be performed by forming an ultraviolet irradiation region having high and uniform ultraviolet intensity.
- the arrangement of the irradiation region can be freely set depending on the arrangement method of the condensed ultraviolet ray emitting unit, for example, a plurality of the condensed ultraviolet ray emitting units are arranged around the flow path, and are multi-directional. The sterilization can be performed more efficiently by irradiating the ultraviolet rays collected on the object to be sterilized. Further, the ultraviolet sterilization region can be lengthened by arranging the condensed ultraviolet ray emitting units in series.
- This figure is a diagram showing a transverse section and a longitudinal section of an ultraviolet light emitting module that can be suitably used as a light source in the ultraviolet sterilization apparatus according to an embodiment of the present invention.
- This figure is a cross-sectional view of an ultraviolet germicidal apparatus according to one embodiment of a typical present invention.
- This figure is a side view of an ultraviolet ray sterilizing apparatus according to an embodiment of a typical present invention.
- This figure is a cross-sectional view of an ultraviolet ray germicidal apparatus according to another embodiment of the present invention.
- This figure is a cross-sectional view of an ultraviolet ray germicidal apparatus according to another embodiment of the present invention.
- the ultraviolet sterilization apparatus of the present invention includes a flow path for circulating a sterilized body made of a fluid, the periphery of which is made of a material having permeability to ultraviolet light having a sterilizing action (deep ultraviolet light), and the outside of the flow path. And a light source that emits ultraviolet light having a sterilizing action, and sterilizes by irradiating the ultraviolet light emitted from the light source to a body to be sterilized that circulates in the flow path,
- the light source includes a plurality of “ultraviolet light emitting elements that emit ultraviolet light having a bactericidal action”, and further includes a condensing device that condenses the ultraviolet light emitted from each ultraviolet light emitting element. The irradiated ultraviolet light is irradiated to the object to be sterilized.
- a preferred embodiment of the ultraviolet sterilization apparatus of the present invention is “a plurality of deep ultraviolet light emitting elements on the side surface of a cylindrical substrate, so that the optical axis of each deep ultraviolet light emitting element passes through the central axis of the substrate.
- a deep light source comprising a light emitting module configured to emit the deep ultraviolet rays radially with respect to the central axis, and a condensing device including a long elliptical reflecting mirror.
- FIG. 1 shows a transverse sectional view and a longitudinal sectional view (when cut along the XX ′ plane) of the ultraviolet light emitting module 110 used in the condensing ultraviolet ray emitting unit 130.
- a plurality of “ultraviolet light emitting elements emitting ultraviolet rays having a bactericidal action” also referred to as deep ultraviolet light emitting elements
- a cooling medium channel 113 is formed inside the cylindrical base body.
- the cylindrical substrate 111 on which the ultraviolet light emitting element 112 is mounted is covered with a cover 116 formed of an ultraviolet light transmissive material such as quartz or sapphire.
- the cover 116 is airtightly or watertightly attached to the cylindrical substrate using a sealant 117 such as a sealant, packing, o-ring, and the like, and an inert gas such as nitrogen and a gas such as dry air are enclosed therein.
- a sealant 117 such as a sealant, packing, o-ring, and the like
- an inert gas such as nitrogen and a gas such as dry air are enclosed therein.
- a desiccant (not shown) may be placed inside the cover in order to keep the moisture content (humidity) inside the cover low. By doing so, the durability of the ultraviolet light emitting element can be increased.
- the figure shows a mode in which a quartz tube is used as a cover and a cylindrical substrate having an ultraviolet light emitting element mounted therein is inserted.
- the deep ultraviolet light emitting element 112 an element such as an LED (deep ultraviolet LED) that emits deep ultraviolet light having a wavelength of 200 to 350 nm, preferably deep ultraviolet light having a wavelength of 240 to 290 nm is used. It is preferable that the deep ultraviolet LED is arranged in a state where the element is mounted on the submount or accommodated in a package, and further, ultraviolet rays are emitted in a certain direction.
- the submount or the package is provided with wiring for supplying electric power to the deep ultraviolet light emitting element from the outside, a circuit for operating the deep ultraviolet light emitting element normally, and the like. The power supply to the circuit is performed via wiring formed on or inside the cylindrical substrate 111.
- the cylindrical substrate 111 functions as a support for fixing and holding the deep ultraviolet light emitting element 112, and also has a function as a heat sink.
- the cooling medium channel 113 cooling water, cooling air, etc.
- By circulating the cooling medium 118 it is possible to prevent a temperature rise due to heat radiation from the ultraviolet light emitting element, thereby enabling stable operation of the element and extending the element life.
- the cylindrical base body 111 is mainly composed of a metal or ceramic having high thermal conductivity such as copper or aluminum, and in order to increase the contact area of the cooling medium, The inner wall surface is preferably grooved. Further, when the cylindrical substrate 111 is made of a metal material, it is preferable that an insulating layer for insulation from a copper wire or a circuit for supplying power from an external power source to the ultraviolet light emitting element is formed. .
- a plurality of deep ultraviolet light emitting elements 112 are provided on the side surface of the cylindrical base body 111 along the circumferential direction of the base body, and an extension line of the optical axis 115 of each deep ultraviolet light emitting element 112 passes through the central axis 114 of the base body 111.
- positions with the light-projection surface facing the outer side As a result, deep ultraviolet rays emitted from the deep ultraviolet light emitting element are emitted radially with respect to the central axis 114.
- the optical axis 115 of the deep ultraviolet light emitting element 112 means the central axis of the light beam emitted from the deep ultraviolet light emitting element, and is almost synonymous with the traveling direction of the light beam.
- “arranging so that the optical axis 115 passes through the central axis 114 of the substrate 111” means that the optical axis 115 is arranged so as to realize such a state as much as possible. There is no problem.
- FIG. 1 shows an example in which four deep ultraviolet light emitting elements are arranged in the circumferential direction of the base body, but the present invention is not limited to this, and can be appropriately changed according to the outer diameter of the cylindrical base body 111.
- the number of deep ultraviolet light emitting elements arranged in the circumferential direction is usually in the range of 3 to 20, preferably 4 to 12. However, the larger the number of ultraviolet light emitting elements arranged in the circumferential direction, the deep ultraviolet light emitting elements are emitted. Since the intensity (photon flux density) is increased, the number of deep ultraviolet light emitting elements disposed in the circumferential direction beyond the above range is increased when the diameter of the cylindrical substrate 111 is increased when higher intensity ultraviolet light is required. You should increase more.
- the deep ultraviolet light emitting elements 112 are preferably arranged so as to form rows in the length direction of the cylindrical substrate 111 as shown in the longitudinal sectional view of FIG. The longer the arrangement length in the length direction, the longer the deep ultraviolet irradiation region can be. At this time, it is preferable that the deep ultraviolet light emitting elements are arranged densely and regularly so that the intensity in the ultraviolet irradiation region is uniform.
- FIGS. 2 and 3 show a cross-sectional view and a side view of an ultraviolet sterilizer 100 according to an embodiment of the present invention using the ultraviolet light emitting module 110.
- the ultraviolet sterilization apparatus 100 includes a light emitting side housing 125 whose inner surface is a light emitting side reflecting mirror 120 made of an elliptical reflecting mirror, and a light collecting side reflecting mirror 123 whose inner surface is made of a long elliptical reflecting mirror.
- a main body 150 including a light-side casing 126 is provided, and a flow path 140 is provided in the main body 150 for the ultraviolet light emitting module 110 and the sterilized body to circulate.
- the exit-side reflecting mirror 120 and the condensing side reflecting mirror 123 are substantially elliptical reflecting mirrors having substantially the same shape.
- the shape of the internal space formed by joining the output side casing 125 and the condensing side casing 126 to coincide with the focal axis 124 of the light side reflection mirror 123 is the focal axis 121 and the output side of the output side reflection mirror. It becomes a columnar body having an elliptical cross section in which two axes of the condensing axis 122 of the reflecting mirror (the focal axis 124 of the condensing side reflecting mirror) are the focal axes.
- the output side casing 125 and the condensing side casing 126 be detachable from each other or can be opened and closed using a hinge or the like. 3 are provided with covers (not shown) for preventing ultraviolet rays from leaking to the outside.
- the surfaces of the exit-side reflecting mirror 120 and the condensing-side reflecting mirror 123 are made of a material having a high reflectivity with respect to ultraviolet rays, such as platinum group metals such as Ru, Rh, Pd, Os, Ir, and Pt, Al, Ag, Ti, or these
- platinum group metals such as Ru, Rh, Pd, Os, Ir, and Pt
- Al Ag, Ti
- the surface is covered with an ultraviolet transmissive material such as quartz or an ultraviolet transmissive dielectric material in order to prevent the reflectance from being lowered due to oxidation or damage to the surface. Is preferred.
- the ultraviolet light emitting module 110 is arranged so that the central axis 114 thereof coincides with the focal axis 121 of the output side reflection mirror, and is also an output side housing that is also a condensing device including the output side reflection mirror 120.
- a condensing ultraviolet ray emitting unit 130 composed of the body 125 and the ultraviolet light emitting module 110 is formed.
- the flow path 140 is arranged so that the central axis thereof coincides with the condensing axis 122 of the emitting side reflecting mirror (the focal axis 124 of the condensing side reflecting mirror).
- the ultraviolet sterilizer 100 can condense all of the deep ultraviolet rays emitted radially from the ultraviolet light emitting module 110 onto the focal axis of the condensing side reflection mirror, in the direction of the flow path 140.
- Ultraviolet rays emitted in a direction that does not face can also be used effectively.
- the flow path 140 is a flow path having a periphery made of a material having permeability to ultraviolet light having a bactericidal action, such as a quartz tube or a sapphire tube, and a body to be sterilized 160 made of a fluid circulates in the flow path 140.
- the object to be sterilized 160 is irradiated with deep ultraviolet rays that have passed through surrounding partition walls such as a quartz tube wall and a sapphire tube wall, and sterilized.
- the body to be sterilized 160 is not particularly limited as long as it is a fluid, and examples thereof include a slurry in which a small amount of fine solid is suspended in addition to a gas such as air and a liquid such as water.
- pre-processing such as passing a filter or an adsorption layer beforehand, as needed.
- the channel 140 is preferably provided with a mechanism (not shown) for generating turbulent flow in the channel in order to perform more reliable sterilization.
- the turbulent flow generation mechanism is not particularly limited as long as it can generate turbulent flow.
- the turbulent flow grid installed in the flow path or the entrance of the flow path, irregularities formed on the inner wall surface, and filling the flow path Examples thereof include a turbulent flow generating tip and a turbulent flow generating device that rotates a stirring blade at random.
- the object to be sterilized can be uniformly irradiated with ultraviolet rays, and sterilization can be surely performed.
- the turbulent flow generation mechanism is provided with an irradiated ultraviolet ray having a transmitted ultraviolet ray intensity when a to-be-sterilized object having a low deep ultraviolet transmittance, for example, an irradiated object having a thickness of 1 cm is irradiated with an ultraviolet ray having a bactericidal action.
- an ultraviolet transmittance defined by the percentage of the intensity ⁇ (transmitted UV intensity / irradiated UV intensity) ⁇ 100 (%) ⁇ being 50% or less, particularly 40% or less. It is valid.
- the ultraviolet sterilization apparatus 100 shown in the drawing has been described as an example, but the ultraviolet sterilization apparatus of the present invention is not limited to this.
- the condensing side reflecting mirror if it can be reflected to the emitting side reflecting mirror without leaking ultraviolet rays to the outside, use a mirror having a different shape from the elliptical reflecting mirror used as the emitting side reflecting mirror. You can also.
- a parabolic reflection mirror 120 ′ is used as the output-side reflection mirror in place of the elliptical reflection mirror, and the condensing device including the parabolic reflection mirror 120 ′ and the ultraviolet light emitting module 110 are combined to collect light. It can also be an ultraviolet light emitting unit 130 ′.
- a plurality of the condensed ultraviolet ray emitting units 130 or the condensed ultraviolet ray emitting units 130 ′ are used, and these condensed ultraviolet ray emitting units are arranged around the flow path 140, and are condensed on the sterilized body from multiple directions.
- the irradiated ultraviolet light can also be irradiated.
- 4 and 5 show an ultraviolet sterilizer in which four condensed ultraviolet ray emitting units 130 and four condensed ultraviolet ray emitting units 130 'are arranged around the flow path 140, respectively. By setting it as such an arrangement
- Condensing ultraviolet ray output unit (combination of 110 and 120) 130 ' ⁇ ⁇ Condensed ultraviolet ray emitting unit (combination of 110 and 120') 140: Flow path for circulating the object to be sterilized 150 ...
- Main body 160 Object to be sterilized
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- Environmental & Geological Engineering (AREA)
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- Animal Behavior & Ethology (AREA)
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Abstract
Description
110・・・紫外線発光モジュール
111・・・円筒状基体
112・・・深紫外線発光素子
113・・・冷却媒体用流路
114・・・円筒状基体の中心軸
115・・・深紫外線発光素子の光軸
116・・・カバー
117・・・シール部材
118・・・冷却媒体
120・・・長楕円反射ミラーからなる出射側反射ミラー
120´・・放物面反射ミラーからなる出射側反射ミラー
121・・・出射側反射ミラーの焦点軸
122・・・出射側反射ミラーの集光軸
123・・・長楕円反射ミラーからなる集光側反射ミラー
124・・・集光側反射ミラーの焦点軸
125・・・出射側筐体
126・・・集光側筐体
130・・・集光紫外線出射ユニット(110及び120の組み合わせ)
130´・・集光紫外線出射ユニット(110及び120´の組み合わせ)
140・・・被殺菌体が流通するための流路
150・・・本体
160・・・被殺菌体
Claims (7)
- 殺菌作用を有する紫外線に対する透過性を有する材料で周囲が構成された、流体からなる被殺菌体が流通するための流路と、該流路の外部に配置され、殺菌作用を有する紫外線を出射する光源と、を有し、前記流路内を流通する被殺菌体に該光源から出射する前記紫外線を照射することにより殺菌を行なう紫外線殺菌装置であって、前記光源が、複数の"殺菌作用を有する紫外線を発光する紫外線発光素子"からなり、各紫外線発光素子から出射される前記紫外線を集光する集光装置を更に有し、該集光装置によって集光された前記紫外線を前記被殺菌体に照射するようにしたことを特徴とする紫外線殺菌装置。
- 前記各紫外線発光素子は、200nm~350nmの波長を有する深紫外線を出射するLED素子である請求項1に記載の紫外線殺菌装置。
- 前記流路の内部に乱流を発生させる機構を有する請求項1又は2に記載の紫外線殺菌装置。
- 円筒状若しくは多角柱状の基体の側面上に、複数の"殺菌作用を有する紫外線を発光する紫外線発光素子"を、各紫外線発光素子の光軸が前記基体の中心軸を通るように配置して、前記紫外線が前記中心軸に対して放射状に出射されるようにした紫外線発光モジュールからなる光源と、長楕円反射ミラー又は放物面反射ミラーを含んでなる集光装置と、からなり、該長楕円反射ミラー又は放物面反射ミラーの焦点軸上に前記紫外線発光モジュールを配置して、前記紫外線発光モジュールから放射状に出射される前記紫外線を集光して出射する集光紫外線出射ユニットを有し、該集光紫外線出射ユニットから出射される集光された前記紫外線を前記被殺菌体に照射するようにしたことを特徴とする請求項1乃至3のいずれか一に記載の紫外線殺菌装置。
- 前記集光紫外線出射ユニットを複数有し、これら集光紫外線出射ユニットを前記流路の周囲に配設し、多方向から前記被殺菌体に集光された前記紫外線を照射するようにしたことを特徴とする請求項4に記載の紫外線殺菌装置。
- 厚さ1cmの被照射体に殺菌作用を有する紫外線を照射したときにおける透過紫外線強度の照射紫外線強度に対する比の百分率{(透過紫外線強度/照射紫外線強度)×100(%)}で定義される紫外線透過率が50%以下である被殺菌体の殺菌を行なうための殺菌装置である請求項1乃至5のいずれか一に記載の紫外線殺菌装置。
- 請求項1乃至5のいずれか一に記載の紫外線殺菌装置を用いて、厚さ1cmの被照射体に殺菌作用を有する紫外線を照射したときにおける透過紫外線強度の照射紫外線強度に対する比の百分率{(透過紫外線強度/照射紫外線強度)×100(%)}で定義される紫外線透過率が50%以下である被殺菌体の殺菌を行なうことを特徴とする殺菌方法。
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CN201380054112.9A CN104822395B (zh) | 2012-10-31 | 2013-10-24 | 紫外线杀菌装置 |
EP13850157.2A EP2915546B1 (en) | 2012-10-31 | 2013-10-24 | Ultraviolet sterilizer and sterilization method |
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KR20150080489A (ko) | 2015-07-09 |
EP2915546A4 (en) | 2016-06-01 |
CN104822395B (zh) | 2017-05-03 |
EP2915546B1 (en) | 2017-09-13 |
US20150284266A1 (en) | 2015-10-08 |
CN104822395A (zh) | 2015-08-05 |
JP2014087544A (ja) | 2014-05-15 |
EP2915546A1 (en) | 2015-09-09 |
JP5496306B2 (ja) | 2014-05-21 |
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