WO2016047410A1 - 加圧流体殺菌装置 - Google Patents
加圧流体殺菌装置 Download PDFInfo
- Publication number
- WO2016047410A1 WO2016047410A1 PCT/JP2015/075022 JP2015075022W WO2016047410A1 WO 2016047410 A1 WO2016047410 A1 WO 2016047410A1 JP 2015075022 W JP2015075022 W JP 2015075022W WO 2016047410 A1 WO2016047410 A1 WO 2016047410A1
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- WIPO (PCT)
- Prior art keywords
- ultraviolet
- pressurized
- light
- pressurized fluid
- ultraviolet light
- Prior art date
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- 230000001954 sterilising effect Effects 0.000 title claims abstract description 42
- 239000012530 fluid Substances 0.000 title claims abstract description 35
- 230000003287 optical effect Effects 0.000 claims abstract description 66
- 239000013307 optical fiber Substances 0.000 claims abstract description 46
- 230000005540 biological transmission Effects 0.000 claims abstract description 28
- 239000007788 liquid Substances 0.000 claims abstract description 16
- 230000001678 irradiating effect Effects 0.000 claims abstract description 10
- 238000004659 sterilization and disinfection Methods 0.000 claims description 30
- 238000011144 upstream manufacturing Methods 0.000 claims description 16
- 238000009792 diffusion process Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 8
- 230000003139 buffering effect Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 83
- 238000005192 partition Methods 0.000 description 16
- 238000009434 installation Methods 0.000 description 13
- 239000002184 metal Substances 0.000 description 9
- 241000894006 Bacteria Species 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 8
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 6
- 229910052753 mercury Inorganic materials 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 230000000844 anti-bacterial effect Effects 0.000 description 4
- 230000035939 shock Effects 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 210000000805 cytoplasm Anatomy 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 230000002070 germicidal effect Effects 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
- 230000036961 partial effect Effects 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- -1 platinum group metals Chemical class 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 235000013405 beer Nutrition 0.000 description 1
- 235000013361 beverage Nutrition 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003623 enhancer Substances 0.000 description 1
- 229940117927 ethylene oxide Drugs 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000013305 food Nutrition 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 229910052741 iridium Inorganic materials 0.000 description 1
- 230000002147 killing effect Effects 0.000 description 1
- VSQYNPJPULBZKU-UHFFFAOYSA-N mercury xenon Chemical compound [Xe].[Hg] VSQYNPJPULBZKU-UHFFFAOYSA-N 0.000 description 1
- 229910001507 metal halide Inorganic materials 0.000 description 1
- 150000005309 metal halides Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 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
- 150000007523 nucleic acids Chemical class 0.000 description 1
- 102000039446 nucleic acids Human genes 0.000 description 1
- 108020004707 nucleic acids Proteins 0.000 description 1
- 229910052762 osmium Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 238000009281 ultraviolet germicidal irradiation Methods 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61N—ELECTROTHERAPY; MAGNETOTHERAPY; RADIATION THERAPY; ULTRASOUND THERAPY
- A61N5/00—Radiation therapy
- A61N5/06—Radiation therapy using light
-
- 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
Definitions
- the present invention relates to a pressurized fluid sterilization apparatus for ultraviolet sterilizing a pressurized fluid. More specifically, for sterilizing ultraviolet rays by irradiating ultraviolet rays to a pressurized fluid consisting of a pressurized gas or a liquefied gas obtained by pressurizing a gas or a pressurized fluid obtained by pressurizing a liquid.
- the present invention relates to a pressurized fluid sterilizer.
- UV-LED ultraviolet light-emitting diode
- a positive pressure space or a negative pressure space is highly purified (for example, May need to be aseptic).
- ultraviolet sterilization may be used.
- an ultraviolet lamp capable of emitting powerful ultraviolet rays is used as the light source.
- LEDs are used (see Patent Documents 2 to 6).
- Patent Document 7 an apparatus for disinfecting pressurized air by placing an ultraviolet lamp in the pressurized space is also known (see Patent Document 7).
- JP 2014-100206 A Japanese Unexamined Patent Publication No. 07-198178 Japanese Patent Publication No. 06-34941 Utility Model Registration No. 3103406 JP 2008-178374 A JP 2011-254800 JP Japanese Patent Laid-Open No. 10-249128
- the sterilization apparatus can be downsized by using a device that irradiates ultraviolet light to the pressurized air as disclosed in Patent Document 7. It is thought that we can plan.
- a tank (container 7f in FIG. 1 of Patent Document 7) is separately provided in the pressurized air supply line, and an ultraviolet germicidal lamp is disposed therein,
- an ultraviolet germicidal lamp is disposed therein.
- the purpose of the apparatus is to prevent the problem that bacteria are discharged when the apparatus is restarted after being stopped for a long time. Therefore, the tank is connected to the discharge pipe on the most downstream side of the pressurized air supply line. Therefore, the installation conditions of the sterilizer itself are greatly limited.
- the UV germicidal lamp is damaged due to a shock due to sudden pressure or flow rate fluctuations at the start of operation of the device, pressure system failure or piping damage, etc., there is a problem that mercury is released to the outside. .
- the present invention is a novel pressurized fluid sterilization apparatus that solves the above-mentioned problems, and pressurization is performed by irradiating ultraviolet light to a pressurized fluid such as pressurized gas or pressurized liquid (including liquefied gas)
- a fluid sterilization apparatus comprising a pressure-resistant container or pipe that defines a pressurized space, an ultraviolet irradiation device, and an ultraviolet emitting optical member.
- the ultraviolet irradiation device has an ultraviolet light source and an optical transmission mechanism.
- the ultraviolet light source is disposed outside the pressurizing space.
- the light transmission mechanism includes a light incident port on which ultraviolet light emitted from the ultraviolet light source is incident, a light emission port, and an optical transmission path that transmits ultraviolet light incident on the light incident port to the light emission port.
- the optical member for emitting ultraviolet light is disposed in the pressurizing space and optically connected to the light emitting port.
- the ultraviolet ray emitting optical member is configured to emit the ultraviolet ray to a pressurized fluid existing in the pressurized space.
- the optical member for emitting ultraviolet light may be an optical fiber collimator, a lens diffusion plate, a diffusion lens, or a light guide plate.
- an impact buffering mechanism such as a buffer tank, a flow controller, an accumulator, an air cylinder and a branch for a pressure adjusting bypass line is provided upstream of the portion where the ultraviolet light emitting optical member is disposed in the pressurized space. It may be arranged.
- the inner surface of the container or the pipe that is irradiated with ultraviolet rays may be made of an ultraviolet reflecting material.
- the pressurized fluid sterilizer of the present invention a large amount of gas can be sterilized efficiently in a short time compared to a conventional ultraviolet sterilizer that sterilizes a gas (gas) such as air at normal pressure. Moreover, since no light source such as an ultraviolet lamp is installed in the pressurized space, the apparatus can be made very compact. Therefore, it can be installed in a facility or the like for which an installation location could not be secured so far. Furthermore, since the ultraviolet lamp does not break in the pressurized space, the apparatus can be used stably and safely over a long period of time.
- the ultraviolet light emission port when installing the ultraviolet light emission port in the pressurized space, there is almost no spatial restriction in the installation location, and it can be installed in a narrow space such as a pipe. For this reason, it is possible not only to sterilize the gas at an arbitrary place in the pressurization line, but also to sterilize the pressurized liquid (pressurized liquid) that is pumped through the narrow pipe. Furthermore, for example, when a filter or the like is installed in the pressurized space, it is possible to prevent the growth of bacteria by irradiating the filter with ultraviolet rays.
- This figure is a schematic view of the vicinity of the optical member installation part for ultraviolet emission in the ultraviolet sterilization apparatus according to one embodiment of the present invention.
- This figure is a schematic view of the vicinity of an ultraviolet light emitting optical member installation portion in an ultraviolet sterilization apparatus according to another representative embodiment of the present invention.
- This figure is a schematic view of the vicinity of the ultraviolet light emitting optical member installation portion in the ultraviolet sterilization apparatus according to another embodiment of the present invention.
- This figure is a schematic view of the vicinity of the ultraviolet light emitting optical member installation portion in the ultraviolet sterilization apparatus provided with a pressure adjusting bypass line as an impact buffering mechanism.
- This figure is a schematic view of the vicinity of the ultraviolet light emitting optical member installation portion in the ultraviolet sterilization apparatus according to another embodiment of the present invention.
- a pressurized fluid sterilizer includes a pressure-resistant container or pipe that defines a pressurized space, and a pressurized liquid such as a pressurized gas or a liquefied gas existing in the container or the pipe.
- a pressurized fluid sterilization apparatus that sterilizes by irradiating ultraviolet rays to an "ultraviolet irradiation apparatus” having an ultraviolet light source and a light transmission mechanism having a light incident port, a light transmission path, and a light emission port.
- an“ ultraviolet emitting optical member ”disposed in the pressurizing space” the ultraviolet light source is disposed outside the pressurizing space, and the light emitting port is disposed in the ultraviolet emitting optical.
- Pressurized liquid such as pressurized gas or liquefied gas existing in the pressurized space by optically connecting to the member and transmitting ultraviolet light emitted from the light source to the ultraviolet light emitting optical member for emission It is characterized by irradiating ultraviolet rays to To do.
- the pressurized space refers to a space where a gas or liquid can exist in a pressure state higher than normal pressure (atmospheric pressure) or a space where a part of the gas can be liquefied by being compressed.
- a pressurizing space include the following. (1) A pneumatic line for supplying compressed air such as the flow system shown in FIGS. 1 to 5 of Patent Document 7 or the flow system shown in FIGS. 1 and 2 of Japanese Utility Model Publication No.
- Pressure-resistant containers or pipes that define the pressurized space include compressors, gas cylinders, gas tanks, liquefied gas tanks, dryers, gas cylinders, various line filters, accumulators, buffer tanks, silencers, gas mixers, temperature controllers, humidity Examples include regulators, pressure regulators, various valves (valves), metal piping, pressure-resistant resin piping, pressure-resistant hoses, couplers, various joints, pressure gauges, flow meters, and the like.
- the gas to be sterilized by pressurization or liquefaction is not particularly limited, but examples of preferable ones include air, carbon dioxide gas, nitrogen gas, helium gas, argon gas, oxygen gas, Nitrogen oxide, sterilizing gas (mixed gas of ethylene and carbon dioxide) and the like can be exemplified.
- examples of the pressurized liquid include water, various beverages, and the like that are pumped in the pipe.
- the pressure when these gases and liquids are sterilized by ultraviolet irradiation is not particularly limited as long as the pressure is higher than atmospheric pressure. However, when gas is pressurized, a large amount of gas can be sterilized in a narrower space. From the viewpoint, the pressure is preferably higher. From the viewpoint of apparatus cost and application, a preferable pressure is usually in the range of 0.2 MPa to 10 MPa, more preferably 0.2 MPa to 5 MPa, and particularly preferably in the range of 0.2 MPa to 2 MPa.
- the pressure is preferably lower than the atmospheric pressure as long as it can be pumped, and preferably exceeds 0.10133 MPa and is 1 MPa or less, particularly preferably 0.102 MPa or more and 0.800 MPa or less.
- the pressure in the pressurizing space does not need to be constant throughout the entire front space, and an ultraviolet irradiation space (a space where ultraviolet irradiation is performed in the pressurizing space) using a pressure regulating valve, a partition valve, or the like. It is good also considering only the pressure of the said preferable range.
- the “ultraviolet irradiation device” in the pressurized fluid sterilizer includes an “ultraviolet light source” and a “light transmission mechanism” having a light incident port, a light transmission path, and a light emission port. .
- the “ultraviolet light source” is disposed outside the pressurizing space.
- the ultraviolet light emitted from the ultraviolet light source is taken into the light transmission path from the light incident port, passes through the light transmission path, and is transmitted to the light emission port.
- the transmitted ultraviolet rays are emitted from an ultraviolet ray emitting optical member optically connected to the light emission port, and are irradiated toward the pressurized gas, liquefied gas, or pressurized liquid inside the pressurized space.
- a high pressure mercury lamp, a low pressure mercury lamp, a xenon mercury lamp, a xenon lamp, a metal halide lamp, and an ultraviolet light emitting diode can be used.
- a UV-LED having a main emission peak in a wavelength region of 200 nm or more and less than 300 nm, particularly 220 nm or more and 280 nm or less because the bactericidal effect is high and the characteristics of the LED can be utilized.
- the optical transmission line is not particularly limited as long as it can transmit ultraviolet rays, and an optical fiber, an optical waveguide, a light guide plate, or the like can be used.
- the light incident port is provided at one end of the optical transmission path, and the light exit port is provided at the other end of the optical transmission path.
- the ultraviolet irradiation apparatus used by this invention may have structures, such as a bundle fiber, an optical combiner, a coupler, FGB, a collimator.
- a fiber bundle type UV-LED light source (manufactured by Fujikura Co., Ltd., see http://www.fujikura.co.jp/f-news/1198834_4018.html) can be preferably used. .
- the ultraviolet light emitting optical member disposed in the pressurized space is preferably an optical fiber collimator, a lens diffusion plate, a diffusion lens, or a light guide plate, A lens diffusing plate, a diffusing lens or a light guide plate is particularly preferable because the irradiation area can be widened.
- the optical fiber collimator is a member that uses collimated light (parallel light) as light emitted from the optical fiber, and a connector type in which an aspherical lens is incorporated in the ferrule for optical fiber can be suitably used.
- a lens diffusing plate is also called a diffusing film, a diffusing filter or a diffusing sheet, and diffuses and shapes light into a circular or elliptical shape by the action of a minute lens randomly formed on the surface. Thus, uniform irradiation is possible.
- a diffusing lens a lens such as “Light Enhancer Cap” (registered trademark) manufactured by Enplus Co., Ltd. can be suitably used.
- the light guide plate for example, a surface light emitting device disclosed in JP-A-2006-237563 can be suitably used.
- the installation location of the optical member for emitting ultraviolet rays is not particularly limited as long as it is inside the pressurized space, and may be appropriately determined from various pressure-resistant containers or pipes from the viewpoint of irradiation and sterilization efficiency.
- the size, shape and number of installed optical members for ultraviolet radiation, the arrangement pattern when many optical members are installed, and the like may be appropriately determined according to the size and shape in the space as the installation location.
- the surface of the inner surface of the piping and pressure-resistant container in the ultraviolet irradiation space near the portion where the optical member for emitting ultraviolet light is installed has a high reflectance to ultraviolet rays because the sterilization efficiency can be increased by the reflection of ultraviolet rays.
- It is preferably made of a material such as platinum group metals such as Ru, Rh, Pd, Os, Ir, Pt, Al, Ag, Ti, an alloy containing at least one of these metals, or magnesium oxide. Is particularly high, it is particularly preferably formed of Al, a platinum group metal, an alloy containing a platinum group metal, or magnesium oxide. When the surface is composed of these materials, the surface may be coated with an ultraviolet light transmissive material such as silicon dioxide.
- the optical connection between the light emitting port and the optical member for emitting ultraviolet light arranged inside the pressurizing space is not particularly limited as long as it is a method capable of ensuring airtightness in the pressurizing space. These methods can be adopted. 1) A main body of the optical member for emitting ultraviolet light so that a port portion for optical connection with the light emitting port is provided on the optical member for emitting ultraviolet light, and the port portion is exposed to the outside of the pressurizing space while maintaining airtightness.
- An optical fiber (for another connection) is hermetically inserted into the pressurization space, or an optical fiber (for connection other than the optical transmission path) in the pressurization space and an optical fiber outside the pressurization space (the optical transmission path)
- An optical fiber for another connection is hermetically connected, and the optical fiber in the pressurizing space is optically connected to the optical member for emitting ultraviolet light disposed inside the pressurizing space and is outside the pressurizing space. Is optically connected to the light exit port.
- a hole is provided in the optical member for emitting ultraviolet light, and a part of the optical member for emitting ultraviolet light (excluding the flange) can be inserted through the pipe or the pressure resistant container.
- the seal structure such as packing or O-ring may be introduced into the flange and fixed directly using bolts and nuts, or fixed to the flange.
- an airtight adapter and a pressure-resistant connector that can be adopted by the above method 2), an airtight adapter as disclosed in Japanese Patent No. 3002966 and Japanese Patent No. 3335592, FIG. 1 or a pressure-resistant optical connector as described in FIG.
- an adapter or connector can be used by using an optical fiber array or the like.
- FIGS. 1 to 3 show a part including ultraviolet irradiation spaces (8a, 8b and 8c) of ultraviolet sterilization apparatuses 1a, 1b and 1c as pressurized fluid sterilization apparatuses according to embodiments of the present invention which are different from each other.
- a cross-sectional view is shown.
- FIG. 4 is a partial piping diagram of the ultraviolet sterilization apparatus 1d in which the ultraviolet irradiation space has the same structure as the ultraviolet sterilization apparatus 1c shown in FIG. 3 and is provided with a pressure adjusting bypass line as an impact buffering mechanism. Show.
- Each of these ultraviolet sterilizers arranges an optical member for emitting ultraviolet rays in a pipe, and uses a pressure-resistant connector to hermetically connect an optical fiber in the pressurized space and an optical fiber outside the pressurized space, although the optical fiber is optically connected to the ultraviolet light emitting optical member disposed inside the pressurized space, the ultraviolet sterilization apparatus of the present invention is not limited to such an embodiment.
- the installation location of the optical member for emitting ultraviolet light and the optical connection mode between the light emitting port and the optical member for emitting ultraviolet light can be appropriately changed as necessary.
- FIG. 1 is a cross-sectional view of the vicinity of an optical member for irradiating ultraviolet light in the ultraviolet sterilizer 1a, and this part includes an ultraviolet irradiation space 8a.
- the pressurized space 2a is defined by a metal pipe 3a, and the pipe 3a requires a pressurized gas supply source (not shown) such as a compressor and a gas cylinder arranged upstream.
- pressurized gas 4a supplied through the inside of a pressure-resistant container (none shown) such as a dryer or a line filter is circulated or retained.
- a partition valve, a pressure regulating valve, and the like are arranged downstream of the portion, and the gas pressurized by opening these valves is released from the pressurized space to the outside (for example, in the atmosphere). It has become so.
- an optical fiber collimator 9 is disposed as an optical member for emitting ultraviolet rays.
- the optical fiber collimator 9 is optically connected to an optical fiber extending into the pressure space from a pressure-resistant connector 7a that is airtightly fixed through a hole provided obliquely in the pipe 3a.
- the optical fiber extending out of the pressure space from the pressure-resistant connector 7a is optically connected to the light exit port of the optical fiber 5a, which is an ultraviolet light transmission path of the light transmission mechanism, in the coupler 6a.
- the optical fiber 5a extends to the light incident port existing at the other end.
- An ultraviolet light source LS is disposed outside the pipe 3a so as to face the light incident port of the optical fiber 5a.
- the ultraviolet light source LS is composed of a UV-LED capable of emitting ultraviolet light having a main emission peak in a wavelength region of 200 nm or more and less than 300 having a high bactericidal effect.
- the ultraviolet light source LS is optically connected to the light incident port so that the ultraviolet light can enter the light incident port.
- the ultraviolet rays emitted from the ultraviolet light source LS are taken from the light incident port and transmitted through the optical fiber 5a, via the light emitting port and the pressure-resistant connector 7a.
- the light is emitted from the optical fiber collimator 9 as parallel light.
- the emitted ultraviolet rays proceed while being repeatedly reflected on the inner wall surface of the pipe 3a made of an ultraviolet reflective material, and are irradiated to the pressurized gas 4a in the ultraviolet irradiation space 8a, thereby sterilizing the pressurized gas 4a. Is done.
- the emission direction of the ultraviolet rays in the pipe 3a may be the flow direction of the pressurized gas 4a, or may be the direction opposite to the flow.
- the penetration direction of the pressure-resistant connector 7a with respect to the pipe 3a is not limited to the direction oblique to the pipe 3a, and may be a direction perpendicular to the pipe 3a.
- the optical member for emitting ultraviolet light a member capable of diffusing and emitting ultraviolet light into the pipe 3a, such as a lens diffusion plate, a diffusion lens, and a light guide plate, may be employed. Thereby, since the irradiation area
- FIG. 2 is a cross-sectional view of the vicinity of an optical member for ultraviolet emission in the ultraviolet sterilizer 1b, and this part includes an ultraviolet irradiation space 8b.
- the pressurizing space 2b is defined by a metal pipe 3b.
- the pipe 3b is supplied with a pressurized gas supply source (not shown) such as a compressor and a gas cylinder arranged upstream as required.
- the pressurized gas 4b supplied through the inside of a pressure-resistant container (none of which is not shown) such as a dryer or a line filter arranged in a circulating manner or stays there.
- a valve (not shown) is disposed downstream of the portion, and is released to the outside from a pressurized space that is pressurized by opening the valve.
- a plurality of diffusion lenses 10 as optical members for emitting ultraviolet rays are arranged inside the pipe 3b.
- the plurality of diffusing lenses 10 are optically connected to a plurality of optical fibers extending into a pressurizing space from a plurality of pressure-resistant connectors 7b that are airtightly fixed through a plurality of holes provided perpendicular to the pipe 3b. It is connected to the.
- the plurality of pressure-resistant connectors 7b are arranged in alignment in the axial direction of the pipe 3b, and the optical fibers extending from the plurality of pressure-resistant connectors 7b to the outside of the pressurizing space are respectively transmitted through the coupler 6b by the ultraviolet light transmission of the light transmission mechanism. It is optically connected to the light exit port of the optical fiber 5b which is a path.
- the optical fiber 5b extends to the light incident port existing at the other end.
- a plurality of ultraviolet light sources LS are arranged outside the pipe 3b so as to face the light incident ports of the optical fibers 5b.
- Each ultraviolet light source LS is composed of a UV-LED capable of emitting ultraviolet light having a main emission peak in a wavelength region of 200 nm or more and less than 300 having a high bactericidal effect.
- Each ultraviolet light source LS is optically connected to the light incident port so that the ultraviolet light can enter the light incident port.
- the ultraviolet light emitted from each ultraviolet light source LS is taken from the light incident port and transmitted through the optical fiber 5b, and passes through the light emitting port and the pressure-resistant connector 7a. Then, the light is emitted from the diffusion lens 10 as diffused light.
- the emitted ultraviolet rays are irradiated on the pressurized gas 4b in the ultraviolet irradiation space 8b while being repeatedly reflected on the inner wall surface of the pipe 3a made of an ultraviolet reflective material, so that the pressurized gas 4b is sterilized. .
- voltage resistant connector 7b with respect to the piping 3b is not restricted to the direction perpendicular
- the arrangement direction of the respective pressure-resistant connectors 7b is not necessarily limited linearly, and may be arranged in a staggered manner around the pipe 3b or may be arranged in a spiral shape, for example.
- the pipe 3b is not limited to a straight pipe, and can be applied to a pipe having a bent portion.
- the ultraviolet light source LS is not limited to the case of being configured by a plurality of light sources arranged corresponding to each optical fiber 5b, and may be configured by a single light source common to each optical fiber 5b.
- FIG. 3 is a cross-sectional view in the vicinity of the ultraviolet light emitting optical member installation portion in the ultraviolet sterilizer 1c, and this portion includes an ultraviolet irradiation space 8c.
- the pressurized space 2c is defined by a metal pipe 3c, which is supplied from a pressurized gas supply source (not shown) such as a compressor and a gas cylinder disposed upstream as needed.
- Pressurized gas 4c supplied through the inside of a pressure-resistant container (none shown) such as a dryer or a line filter is circulated or stagnated.
- a valve (not shown) is disposed downstream of the portion, and is released to the outside from a pressurized space that is pressurized by opening the valve.
- the light guide plate 11 as an optical member for emitting ultraviolet rays is disposed inside the pipe 3c.
- the light guide plate 11 is formed in a rectangular shape having a longitudinal direction parallel to the axial direction of the pipe 3c, with one main surface serving as a light emitting surface and the other main surface being a part of the inner wall surface of the pipe 3c. It is comprised as a support surface attached to the formed support part 3c1.
- the light guide plate 11 has, on one side surface (upper surface in FIG. 3), a plurality of optical fibers extending into the pressurizing space from a plurality of pressure-resistant connectors 7c respectively fixed to a plurality of holes provided perpendicular to the pipe 3c. Optically connected.
- the plurality of pressure-resistant connectors 7c are arranged in alignment in the axial direction of the pipe 3c, and the optical fibers extending from the plurality of pressure-resistant connectors 7c to the outside of the pressurizing space are respectively transmitted through the coupler 6c with ultraviolet light transmission of the light transmission mechanism. It is optically connected to the light exit port of the optical fiber 5c which is a path.
- the optical fiber 5c extends to the light incident port existing at the other end.
- a plurality of ultraviolet light sources LS are arranged outside the pipe 3c so as to face the light incident ports of the optical fibers 5c.
- Each ultraviolet light source LS is composed of a UV-LED capable of emitting ultraviolet light having a main emission peak in a wavelength region of 200 nm or more and less than 300 having a high sterilizing effect.
- Each ultraviolet light source LS is optically connected to the light incident port so that the ultraviolet light can enter the light incident port.
- the ultraviolet light emitted from each ultraviolet light source LS is taken in from the light incident port and transmitted through the optical fiber 5c, via the light emitting port and the pressure-resistant connector 7c. Then, the light is emitted as diffused light from the one main surface (light emitting surface) of the light guide plate 11.
- the emitted ultraviolet light proceeds while being repeatedly reflected on the inner wall surface of the pipe 3c made of an ultraviolet reflective material, and is irradiated to the pressurized gas 4c in the ultraviolet irradiation space 8c, thereby sterilizing the pressurized gas 4c. Is done.
- the light guide plate 11 is disposed along the inner wall surface of the pipe 3c. Therefore, even when the flow rate of the pressurized gas 4c in the pipe 3c is relatively high, Ultraviolet sterilization of the pressurized gas 4c can be performed without hindering the flow.
- the light guide plate 11 is disposed along the axis of the pipe 3c. May be.
- the light guide plate 11 may include not only one main surface but also the other main surface opposite to the one main surface as a light emitting surface.
- FIG. 4 is a partial piping diagram of the ultraviolet sterilizer 1d in which the ultraviolet irradiation space has a structure similar to that of the ultraviolet sterilizer 1c shown in FIG. 3, and the pressure adjusting bypass line 13 is provided as an impact buffering mechanism.
- the main line 12 includes an ultraviolet irradiation space 8d.
- a pressure-resistant container such as a dryer or a line filter (not shown) arranged as necessary from a pressurized gas supply source (not shown) such as a compressor or a gas cylinder arranged upstream of the pipe portion (not shown)
- Pressurized gas 4d is supplied via the inside of the chamber, and a valve (not shown) is disposed downstream of the portion, and the pressurized pressure is increased by opening the valve. It is discharged from the pressure space to the outside.
- the pressure adjusting bypass line 13 branches from a branch point 21 located upstream of the ultraviolet irradiation space 8d of the main line 12, bypasses the ultraviolet irradiation space 8d, and is positioned downstream of the ultraviolet irradiation space 8d. It is provided so as to be connected to the main line 12 at the junction 22.
- Partition valves 15 and 16 are provided immediately after the branch point 21 in the main line 12 and immediately after the branch point 21 in the bypass line 13, respectively, and immediately before the junction 22 in the main line 12 and immediately before the junction 22 in the bypass line 13. Are provided with partition valves 19 and 20, respectively, and the flow path of the pressurized gas 4d can be switched by opening and closing these valves.
- a pressure gauge 14 is installed upstream of the junction 21 to measure the pressure upstream of the junction 21, and a pressure downstream of the junction 22 is measured downstream of the junction 22. Pressure gauges 23 are respectively installed. Further, a flow rate adjusting valve 17 is provided downstream of the partition valve 15 of the main line 12 and upstream of the ultraviolet irradiation space 8d, and a flow rate adjusting valve 18 is provided between the partition valves 16 and 20 of the bypass line 13, respectively. The flow rate (flow velocity) of the flowing pressurized gas 4d can be controlled.
- the bypass line 13 in the ultraviolet sterilizer 1d is installed in order to reduce an adverse effect on the device due to a shock due to a sudden change in pressure or flow velocity at the start of operation of the device (at the start of circulation of pressurized gas). Yes, shock can be reduced by the following mechanism.
- the flow of the pressurized gas 4d is started with all the partition valves 15, 16, 19 and 20 and the flow rate adjusting valves 17 and 18 closed, and the pressure upstream from the branch point 21 is started.
- the gate valves 16 and 20 are sequentially opened.
- the pressurized gas 4d is circulated through the bypass line 13 while the flow rate adjusting valve is gradually opened to increase the pressure downstream of the junction 22 to equalize the pressure upstream of the branch point 21.
- the flow rate adjusting valve 18 and the partition valves 20 and 16 are closed, and the flow rate adjusting valve 17 is gradually opened after the partition valve 15 is opened.
- the pressurized gas is slowly introduced into the main line 12 between the partition valve 15 and the partition valve 19 by opening the partition valve 19 after the pressure upstream of the partition valve 19 is stabilized. Thereby, the shock in the ultraviolet irradiation space 8d can be relieved.
- the ultraviolet sterilizer 1d shown in FIG. 4 is an example in which a pressure adjusting bypass line 12 is provided as an impact buffering mechanism and a branch thereof is provided upstream from the ultraviolet irradiation space 8d, but a buffer tank, a flow controller, an accumulator, an air A similar buffering effect can be obtained by installing a cylinder or the like upstream of the ultraviolet irradiation space 8d.
- FIG. 5 is a cross-sectional view of the vicinity of an ultraviolet light emitting optical member installation portion in an ultraviolet sterilization apparatus 1e as a pressurized fluid sterilization apparatus according to another embodiment, and this part includes an ultraviolet irradiation space 8e.
- the pressurized space 2e is defined by a metal pipe 3e, and the pipe 3e is supplied from a pressurized gas supply source (not shown) such as a compressor or a gas cylinder arranged upstream.
- the pressurized gas 4e circulates, a line filter 30 for filtering the pressurized gas 4e is arranged in the ultraviolet irradiation space 8e of the pipe 3e, and a valve (not shown) is arranged downstream of the pipe 3e. By opening the valve, the pressure is released from the pressurized space.
- a diffusion lens 31 is disposed as an optical member for emitting ultraviolet rays.
- the diffusing lens 31 is formed of an optical fiber 5e that is an ultraviolet light transmission path through a pressure-resistant connector, a coupler, and the like that are airtightly fixed through a hole provided obliquely in the pipe 3e. Optically connected to the light exit port.
- the optical fiber 5e extends to the light incident port existing at the other end.
- An ultraviolet light source LS is disposed outside the pipe 3e so as to face the light incident port of the optical fiber 5e.
- the ultraviolet light source LS is composed of a UV-LED capable of emitting ultraviolet light having a main emission peak in a wavelength region of 200 nm or more and less than 300 having a high bactericidal effect.
- the ultraviolet light source LS is optically connected to the light incident port so that the ultraviolet light can enter the light incident port.
- the ultraviolet light emitted from the ultraviolet light source LS is taken from the light incident port and transmitted through the optical fiber 5e, and is transmitted from the diffusion lens 31 via the light emitting port. It is emitted as diffused light.
- the emitted ultraviolet rays are irradiated on the pressurized gas 4a and the line filter 30 in the ultraviolet irradiation space 8e, so that the pressurized gas 4a and the line filter 30 are sterilized.
- the line filter 30 can be sterilized, so that the line filter 30 can be protected from contamination by bacteria and at the time of passing through the line filter 30.
- the recontamination of the pressurized gas 4e (reattachment of bacteria) can be effectively prevented.
- the ultraviolet sterilizer 1e having the above-described configuration is provided in a part of the pipe 3e.
- the ultraviolet sterilizer 1e may be configured as a single unit that can be attached to the outlet of the pipe from which the pressurized gas is discharged. Good. That is, since the outlet of the pipe is easily in contact with the outside air, it is relatively easily contaminated with bacteria. Therefore, the ultraviolet sterilizer 1e including the line filter 30 and the like is attached in the vicinity of the outlet of the pipe, so that it is possible to stably discharge clean pressurized gas that is not contaminated with bacteria over a long period of time.
- UV irradiation space 9 ⁇ collimator 10 for optical fiber ⁇ diffusion lens 11 ⁇ light guide plate 12 ⁇ main line 13 ⁇ bypass line 14 for pressure adjustment ⁇ ⁇ ⁇ pressure gauges 15 and 16 Partition valves 17 and 18 Flow control valves 19 and 20 Partition valves 21 Branch point 22 Junction point 23 Pressure gauge 30 Line filter 31 Diffuser lens
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Abstract
Description
前記紫外線照射装置は、紫外線光源と、光伝送機構とを有する。前記紫外線光源は、前記加圧空間の外部に配置される。前記光伝送機構は、前記紫外線光源から出射された紫外線が入射する光入射ポートと、光出射ポートと、上記光入射ポートに入射した紫外線を前記光出射ポートへ伝送する光伝送路と、を有する。
前記紫外線出射用光学部材は、前記加圧空間内に配置され、前記光出射ポートに光学的に接続される。前記紫外線出射用光学部材は、前記加圧空間内に存在する加圧状態の流体に前記紫外線を出射するように構成される。
(1)特許文献7の図1~5に示されるフローシステム又は実開平6-74145号公報の図1及び2に示されるようなフローシステムのような圧縮空気を供給するための空圧ライン(分岐や合流を有していてもよい圧縮性流体回路)における加圧空間(空気圧縮機、圧縮空気タンク、エアードライヤー、各種フィルター、およびこれらを連結する配管内の空間)、
(2)加圧ガス供給手段として空気圧縮機に代えて定置式液化ガス供給装置や高圧ガス用マニフォールドを用いたような医療用ガス供給システムにおける加圧空間(たとえば、特開平9-75459号公報の図1、特開平10-15070号公報の図1及びhttp://www.megacare.co.jp/feature/oxymed.htmlの概念図等参照)、
(3)特開2003-267493号公報の図1に示されるビールサーバー又は特開2014-502903号公報の図1に示される加圧ガスによるミルクの泡立てにおけるガス供給システムにおける加圧空間、
・特開2004-42648号公報図1の加圧ガス導入装置、特表2005-503953号公報の図2に示される呼吸ガス供給システム、特開2011-110457号公報の図1に示される濾過機設備等のガス供給システムにおける加圧空間、
(4)水道配管内の空間など。
ここで、光ファイバコリメータとは、光ファイバからの出射光をコリメート光(平行光)とする部材であり、光ファイバ用フェルールに非球面レンズを組み込んだコネクタタイプのものが好適に使用できる。レンズ拡散板(Light Shaping Diffuser)とは、拡散フィルム、拡散フィルター又は拡散シートとも呼ばれるものであり、表面にランダムに形成される微小なレンズの作用等により、光を円形や楕円形などに拡散整形して均一な照射を可能にするものである。また、拡散レンズとしては株式会社エンプラス社製「Light Enhancer Cap」(登録商標)のようなものが好適に使用できる。さらに導光板としては、たとえば特開2006-237563号公報に開示されている面発光デバイスのようなものが好適に使用できる。
1)紫外線出射用光学部材に前記光出射ポートと光学的に接続するようなポート部を設け、気密を保ちながら該ポート部が加圧空間外に露出するようにして紫外線出射用光学部材の本体を加圧空間内に配置し、加圧空間外において該ポート部と前記光出射ポートとを光学的に接続する方法、又は
2)気密アダプタや耐圧性のコネクタを用いて(光伝送路とは別の接続用の)光ファイバを加圧空間内に気密挿入するか又は加圧空間内の(光伝送路とは別の接続用の)光ファイバと加圧空間外の(光伝送路とは別の接続用の)光ファイバを気密接続し、加圧空間内の光ファイバを加圧空間の内部に配置される前記紫外線出射用光学部材に光学的に接続すると共に加圧空間外の光ファイバを前記光出射ポートと光学的に接続する方法。
上記1)の方法を採用する場合には、例えば、紫外線出射用光学部材に鍔部を設けると共に配管や耐圧性容器に紫外線出射用光学部材の一部(鍔部を除く)が貫通挿入できる穴をあけ、鍔部にパッキンやO-リング等のシール構造を導入し、ボルト・ナットを用いて直接固定するかまたはフランジ固定すればよい。
また、上記2)の方法で採用できる気密アダプタや耐圧性のコネクタとしては、特許第3002966号公報、特許第3335592号公報に開示されているような気密アダプタ、特開平6-250047号公報の図1や図4に記載されているような耐圧型光コネクタなどを挙げることができる。なお、光伝送路として光導波路又は導光板を用いた場合には、光ファイバアレイなどを用いることによりこのようなアダプタやコネクタを使用することが可能となる。
2a、2b、2c、2e・・・加圧空間
3a、3b、3c、3d、3e・・・配管
4a、4b、4c、4d、4e・・・加圧ガス
5a、5b、5c、5d、5e・・・光ファイバ
6a、6b、6c・・・カップラー
7a、7b、7c・・・耐圧コネクタ
8a、8b、8c、8d、8e・・・紫外線照射空間
9・・・光ファイバ用コリメータ
10・・・拡散レンズ
11・・・導光板
12・・・メインライン
13・・・圧力調整用バイパスライン
14・・・圧力計
15,16・・・仕切りバルブ
17、18・・・流量調節バルブ
19,20・・・仕切りバルブ
21・・・分岐点
22・・・合流点
23・・・圧力計
30・・・ラインフィルター
31・・・拡散レンズ
Claims (8)
- 加圧状態の流体に紫外線を照射して殺菌を行う加圧流体殺菌装置であって、
加圧空間を規定する耐圧性の容器又は配管と、
前記加圧空間の外部に配置された紫外線光源と、光伝送機構とを有する紫外線照射装置であって、前記光伝送機構は、前記紫外線光源から出射された紫外線が入射する光入射ポートと、光出射ポートと、前記光入射ポートに入射した紫外線を前記光出射ポートへ伝送する光伝送路とを有する紫外線照射装置と、
前記加圧空間内に配置され、前記光出射ポートに光学的に接続された紫外線出射用光学部材であって、前記加圧空間内に存在する加圧状態の流体に前記紫外線を出射するように構成された紫外線出射用光学部材と
を具備する加圧流体殺菌装置。 - 前記加圧状態の流体が、加圧ガス又は加圧液体である請求項1に記載の加圧流体殺菌装置。
- 前記加圧状態の流体が、0.2MPa以上10MPa以下の圧力のガス若しくは液化ガス、又は0.10133MPaを越え1MPa以下の圧力の液体である、請求項1に記載の加圧流体殺菌装置。
- 前記紫外線出射用光学部材が光ファイバ用コリメータ、レンズ拡散板又は拡散レンズである請求項1乃至3の何れか一に記載の加圧流体殺菌装置。
- 前記紫外線出射用光学部材が導光板であり、前記光伝送機構の前記光出力ポートがを該導光板の側面に接続される請求項1乃至3の何れか一に記載の加圧流体殺菌装置。
- 前記加圧空間内の紫外線出射用光学部材が配置される部分より上流側に配置された、衝撃緩衝機構をさらに具備する請求項1乃至5の何れか一に記載の加圧流体殺菌装置。
- 紫外線照射される前記容器又は配管の内面が紫外線反射材で構成される請求項1乃至6の何れか一に記載の加圧流体殺菌装置。
- 前記容器又は配管は、前記加圧流体が通過するラインフィルターを含み、
前記紫外線出射用光学部材は、前記ラインフィルターに前記紫外線を出射するように構成される請求項1乃至7の何れか一に記載の加圧流体殺菌装置。
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CN201580051007.9A CN106794268A (zh) | 2014-09-24 | 2015-09-03 | 加压流体杀菌装置 |
EP15844007.3A EP3366314A1 (en) | 2014-09-24 | 2015-09-03 | Sterilizing device for pressurized fluid |
US15/514,395 US20170296690A1 (en) | 2014-09-24 | 2015-09-03 | Pressurized fluid sterilizing apparatus |
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