Fluid sterilization device

Abstract

To provide a fluid sterilization apparatus capable of increasing the size of a container and reducing manufacturing costs.SOLUTION: A fluid sterilization apparatus according to an embodiment includes: a container which contains a metal and has an interior space in which a fluid to be treated can be circulated; a light source capable of emitting ultraviolet light into the space of the container; and at least one first or second reflective part provided on the inner surface of the container. The first reflective part is like a sheet and contains a fluoropolymer. The second reflective part is like a film and contains a silicone resin.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] SUMMARY OF THE DISCLOSURE An embodiment of the present invention relates to a fluid disinfection device. [Background technology]

[0002] There is a fluid sterilization device that sterilizes a fluid such as water by irradiating the fluid with ultraviolet light. For example, a fluid sterilization device has been proposed that includes a container through which the fluid flows and a light source that is provided at an end of the container and irradiates the inside of the container with ultraviolet light.

[0003] In this case, the fluid to be treated comes into contact with the inner surface of the container, and part of the ultraviolet light irradiated from the light source is incident on the inner surface of the container. Therefore, the container is made of a material that is resistant to the fluid to be treated and to ultraviolet light. For example, a fluid sterilization device including a container containing quartz glass or a container containing a fluororesin such as polytetrafluoroethylene (PTFE) has been proposed.

[0004] Here, in recent years, there has been a demand for an increase in the processing flow rate, and therefore a demand for a larger fluid sterilization device and therefore a larger container. However, the manufacturing cost of containers containing quartz glass or fluororesin is high, and the cost of making the container larger will be even higher. Therefore, it has been difficult to increase the processing flow rate of the fluid sterilization device. Therefore, there has been a demand for the development of a fluid sterilizing device that allows for larger containers and reduced manufacturing costs. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-122262 A [Patent Document 2] JP 2018-118201 A Summary of the Invention [Problem to be solved by the invention]

[0006] An object of the present invention is to provide a fluid sterilizing device that allows for a larger container and reduces manufacturing costs. [Means for solving the problem]

[0007] The fluid sterilization device according to the embodiment has a space therein through which a fluid to be treated can flow, and includes a metal. It has a shape that extends in one direction. A container; a light source capable of irradiating the space of the container with ultraviolet light; side On the surface, multiple and a first reflecting portion or a second reflecting portion. Multiple the first reflecting portion has a sheet shape and contains a fluororesin; The first reflecting portions are aligned along the central axis of the container and adhered or joined to the inner surface of the container. Each of the first reflecting portions has a thickness of 300 μm or more and 1000 μm or less. The second reflecting portion is S Contains ricone resin A thermoset film is disposed on the interior surface of the container along the central axis of the container. Effect of the Invention

[0008] According to an embodiment of the present invention, it is possible to provide a fluid sterilization device that allows for a larger container and reduced manufacturing costs. [Brief description of the drawings]

[0009] [Figure 1] FIG. 1 is a schematic perspective view illustrating a fluid sterilizing device according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic cross-sectional view of the fluid sterilizing device in FIG. 1 taken along line AA. [Diagram 3] 13(a) and 13(b) are schematic cross-sectional views illustrating a case in which a sheet-like reflecting portion is provided on the inner surface of a container. [Figure 4] 5A to 5C are schematic cross-sectional views illustrating a film-like reflecting portion. [Diagram 5] FIG. 11 is a schematic perspective view illustrating a fluid sterilization device according to another embodiment. [Figure 6] 6 is a schematic cross-sectional view of the fluid sterilizing device in FIG. 5 taken along line BB. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] Hereinafter, an embodiment will be described with reference to the drawings. In the drawings, the same components are denoted by the same reference numerals, and detailed description thereof will be omitted as appropriate.

[0011] FIG. 1 is a schematic perspective view illustrating a fluid sterilizing device 1 according to this embodiment. FIG. 2 is a schematic cross-sectional view of the fluid sterilization device 1 in FIG. 1 taken along line AA. As shown in FIG. 1, a fluid sterilization device 1 includes, for example, a container 2, a window 3, a light source 4, and a reflecting section 5 (corresponding to an example of a first reflecting section).

[0012] The vessel 2 has a space (hereinafter referred to as the internal space) therein through which the fluid 301a to be treated flows. The vessel 2 has, for example, a form that extends in one direction. The vessel 2 has, for example, a cylindrical shape. For example, one end of the vessel 2 is open and the other end of the vessel 2 is closed. A plate material may be welded to the other end of the vessel 2, or a plate material may be detachably attached via a sealing member or the like. The vessel 2 may be, for example, a cylindrical tube with one end closed.

[0013] The container 2 can be made of a metal that is resistant to the fluid 301a to be treated. The container 2 can be made of, for example, stainless steel. In consideration of weight reduction, the container 2 can be made of, for example, titanium or aluminum. In consideration of cost reduction and corrosion resistance, the container 2 can be made of, for example, iron or aluminum, and further subjected to surface treatment such as plating or anodizing.

[0014] The vessel 2 may be provided with a supply pipe 21 and a discharge pipe 22 . The supply pipe 21 is tubular and is provided on the outer surface of the container 2. An internal hole of the supply pipe 21 is connected to the internal space of the container 2. The supply pipe 21 is connected to a supply source of the fluid 301a to be treated, for example, via piping. The supply source of the fluid 301a is, for example, a pump that pressure-feeds the fluid 301a. The supply pipe 21 can be provided, for example, near the end of the container 2. The supply pipe 21 illustrated in FIG.

[0015] The discharge pipe 22 is tubular and is provided on the outer surface of the container 2. An internal hole of the discharge pipe 22 is connected to the internal space of the container 2. The discharge pipe 22 is connected, for example, via piping to a tank or a cleaning device to which the sterilized fluid 301b is supplied. The discharge pipe 22 can be provided, for example, in the vicinity of the end of the container 2 opposite to the side where the supply pipe 21 is provided. The discharge pipe 22 illustrated in FIG. 1 is provided in the vicinity of the end of the container 2 on the window 3 side. As shown in FIG. 1, the supply pipe 21 and the discharge pipe 22 are preferably provided at positions that are point-symmetric with respect to the center of the internal space of the container 2, for example.

[0016] If the supply pipe 21 and the discharge pipe 22 are provided in such positions, the fluid 301a supplied from the supply pipe 21 to the internal space of the container 2 flows in a direction approaching the window 3 through which the ultraviolet light enters. Therefore, the supplied fluid 301a can be efficiently sterilized by the ultraviolet light. In addition, since a flow is formed in the internal space of the container 2 along the central axis of the container 2, it is possible to prevent the sterilized fluid 301b from remaining in the internal space of the container 2.

[0017] Furthermore, if the supply pipe 21 and the discharge pipe 22 are arranged at positions that are point-symmetrical with respect to the center of the internal space of the container 2, the fluid 301a can be sterilized more efficiently, and the sterilized fluid 301b can be further prevented from remaining in the internal space of the container 2.

[0018] The installation positions of the supply pipe 21 and the discharge pipe 22 are not limited to those exemplified above. For example, the supply pipe 21 may be provided on the surface facing the window 3.

[0019] The window 3 has a plate shape and is provided at one end of the container 2 so as to be liquid-tight. The window 3 can be detachably attached to the end of the container 2 via, for example, a sealing member. The window 3 closes the opening at the end of the container 2. The surface of the window 3 facing the container 2 is exposed to the internal space of the container 2. The window 3 is made of a material that is transparent to ultraviolet rays and has resistance to ultraviolet rays and the fluid 301a.

[0020] For example, the window 3 can be made of quartz glass, silicone resin, fluororesin, etc. As described below, the light source 4 (light-emitting element 41) emits ultraviolet light having a peak wavelength of 290 nm or less. Therefore, it is more preferable that the window 3 be made of quartz glass, which has a high transmittance of ultraviolet light having a peak wavelength of 290 nm or less.

[0021] An anti-reflection film may also be provided on the surface of the window 3 facing the light source 4. If an anti-reflection film is provided, it is possible to prevent the ultraviolet light irradiated from the light source 4 from being reflected by the window 3 and becoming difficult to irradiate to the fluid 301a. In other words, it is possible to improve the utilization efficiency of the ultraviolet light irradiated from the light source 4.

[0022] An anti-soiling film may also be provided on the surface of the window 3 facing the container 2. For example, fluids that have not been artificially purified, such as seawater and well water, contain foreign matter such as sand, dead microorganisms, and inorganic salts. Even artificially purified fluids may contain inorganic salts. If foreign matter contained in the fluid 301a adheres to or precipitates on the window 3, it becomes difficult for the ultraviolet light irradiated from the light source 4 to pass through the window 3. If an anti-soiling film is provided, it is possible to prevent foreign matter from adhering to or precipitating on the window 3. This makes it possible to maintain the sterilization effect and reduce maintenance.

[0023] The light source 4 irradiates ultraviolet light into the internal space of the container 2. The light source 4 can be detachably provided at the end of the container 2 on the side where the window 3 is provided. The light source 4 includes, for example, a light emitting element 41, a substrate 42, and a holder 43. The light emitting element 41 is provided on the substrate 42, and irradiates ultraviolet light toward the window 3. A gap may be provided between the light emitting element 41 and the window 3.

[0024] There can be at least one light emitting element 41. When a plurality of light emitting elements 41 are provided, the plurality of light emitting elements 41 can be connected in series. There are no particular limitations on the light emitting element 41 as long as it is an element that generates ultraviolet light. The light emitting element 41 can be, for example, a light emitting diode or a laser diode.

[0025] There are no particular limitations on the peak wavelength of the ultraviolet light emitted from the light emitting element 41 as long as it has a sterilizing effect. In this case, if the peak wavelength is 290 nm or less, the sterilizing effect can be enhanced, and if the peak wavelength is 240 nm to 280 nm, the sterilizing effect can be further improved.

[0026] The substrate 42 has a plate shape and is provided on the surface of the holder 43 on the window 3 side. A wiring pattern can be provided on one surface of the substrate 42. The material of the substrate 42 is preferably one that is resistant to ultraviolet rays. The material of the substrate 42 can be, for example, ceramics such as aluminum oxide. The substrate 42 can also be a metal plate whose surface is covered with an inorganic material (metal core substrate). For example, the metal core substrate can be a metal plate made of aluminum, copper, stainless steel, or the like, whose surface is covered with ceramics or the like.

[0027] If the material of the substrate 42 is ceramics or the like, or if the substrate 42 is a metal core substrate, it is possible to obtain resistance to ultraviolet rays and high heat dissipation. If the heat dissipation of the substrate 42 is high, the temperature of the light-emitting element 41 is less likely to exceed the maximum junction temperature. Therefore, it is possible to increase the power applied to the light-emitting element 41 and increase the processing flow rate of the fluid 301a. Furthermore, even if the temperature of the fluid 301a is high, such as hot spring water, the temperature of the light-emitting element 41 is less likely to exceed the maximum junction temperature. Therefore, it is possible to increase the types of fluids 301a that can be processed.

[0028] The holder 43 can be detachably attached to the end of the container 2 via, for example, a support member. Although the light emitting element 41 has a longer life than a discharge lamp, the light emitting efficiency decreases as the lighting time becomes longer. In addition, the light emitting element 41 may break down and not light up. If the holder 43 is detachably attached to the container 2, the light emitting element 41 can be easily replaced.

[0029] The holder 43 may be, for example, a plate-like body. The holder 43 may be attached to, for example, an end of the container 2 or a support member provided at the end of the container 2 using a fastening member such as a screw.

[0030] Since the internal space of the container 2 and the space in which the light source 4 is provided are separated by the window 3, the light source 4 can be attached and detached even when the fluid 301a is present in the internal space of the container 2. This improves maintainability.

[0031] Moreover, the holder 43 has a function of dissipating heat generated in the light emitting element 41 to the outside. Therefore, the holder 43 is preferably made of a material with high thermal conductivity. The holder 43 can be made of a metal such as aluminum, copper, or stainless steel. Also, heat dissipation fins can be provided on the surface of the holder 43 opposite to the substrate 42 side, on the side, etc.

[0032] Also, a cooling device for cooling the holder 43 may be provided. The cooling device may be provided, for example, on the side of the holder 43 opposite to the substrate 42 side. The cooling device may be, for example, a fan that supplies air to the holder 43. In the case where the holder 43 is provided with heat dissipation fins, the cooling device may be a fan that supplies air to the heat dissipation fins. Also, the cooling device may be, for example, one that supplies liquid to a flow path provided in the holder 43. That is, the cooling device may be an air-cooled type or a liquid-cooled type.

[0033] The cooling device may be omitted depending on the number of light-emitting elements 41, the amount of heat generated, the temperature and flow rate of the fluid 301a, etc. However, if a cooling device is provided, the temperature of the light-emitting elements 41 is less likely to exceed the maximum junction temperature even if the number of light-emitting elements 41, the applied power, etc. are increased.

[0034] Furthermore, if a cooling device is provided, the temperature of the light emitting element 41 is less likely to exceed the maximum junction temperature even if the temperature of the fluid 301a rises or the flow rate of the high-temperature fluid 301a increases. Therefore, the range of compatible fluids 301a can be expanded.

[0035] Also, a cover may be provided to cover the window 3 and the light source 4. When a cooling device is provided, a cover may be provided to cover the window 3, the light source 4, and the cooling device. The cover may be detachably provided on the end of the container 2 via, for example, a support member. The material of the cover is not particularly limited as long as it has a certain degree of rigidity. The material of the cover may be, for example, a metal such as stainless steel. Also, the cover may be provided with ventilation holes.

[0036] Here, a typical fluid sterilization device is provided with a container containing quartz glass or fluororesin such as polytetrafluoroethylene (PTFE). The container containing quartz glass or fluororesin can increase resistance to the fluid 301a to be treated and resistance to ultraviolet light. However, the manufacturing cost of a container containing quartz glass or fluororesin is high.

[0037] In recent years, there is a demand for an increase in the processing flow rate. For example, a processing flow rate of 100 L / min or more may be required. In this case, if the container containing quartz glass or fluororesin is enlarged, it will cost even more. Therefore, it is difficult to increase the processing flow rate of a fluid sterilization device equipped with a container containing quartz glass or fluororesin.

[0038] Therefore, the fluid sterilization device 1 according to this embodiment is provided with a container 2 containing metal. The container 2 containing metal has a lower manufacturing cost than a container containing quartz glass or fluororesin. Therefore, even if the container 2 is enlarged in order to increase the treatment flow rate, an increase in manufacturing costs can be suppressed.

[0039] On the other hand, the reflectance of metal to ultraviolet light is lower than that of fluororesin. Therefore, when the ultraviolet light irradiated into the internal space of the container 2 is incident on the inner surface of the container 2 containing metal, the amount of ultraviolet light reflected into the internal space of the container 2 is reduced. In other words, the utilization efficiency of the ultraviolet light irradiated into the internal space of the container 2 is reduced.

[0040] For this reason, the fluid sterilization device 1 according to this embodiment is provided with a reflecting section 5. The reflective portion 5 includes a material having a high reflectance to ultraviolet light. The reflective portion 5 may include, for example, a fluororesin such as polytetrafluoroethylene.

[0041] 2, the reflecting portion 5 has a sheet shape and is provided, for example, on the inner surface 2a of the container 2. The inner surface 2a of the container 2 is an inner surface of the container 2 that intersects with the end portion where the window 3 is provided.

[0042] The sheet-like reflective portion 5 can be, for example, adhered to the inner surface 2a of the container 2, joined using double-sided tape, or joined using a fastening member such as a screw. In this case, the inner surface 2a of the container 2 may be curved. The sheet-like reflective portion 5 has flexibility, so it can be made to conform to the shape of the inner surface 2a of the container 2.

[0043] If the thickness of the reflective part 5 is too thick, it becomes difficult to make the reflective part 5 conform to the shape of the inner surface 2a of the container 2. If the thickness of the reflective part 5 is too thin, sufficient reflection of ultraviolet rays cannot be obtained, or the rigidity of the reflective part 5 becomes low, making installation of the reflective part 5 difficult. Therefore, the thickness of the reflective portion 5 is preferably set to 300 μm or more and 1000 μm or less.

[0044] 3(a) and (b) are schematic cross-sectional views illustrating a case where a sheet-like reflecting portion 5 is provided on the inner surface 2a of the container 2. FIG. If the width dimension of the sheet-like reflective part 5 is too long, wrinkles are likely to occur when the reflective part 5 is adhered to the inner surface 2a of the container 2, which reduces workability. The width dimension of the reflective part 5 is the length of the reflective part 5 in the direction of the central axis 2b of the container 2.

[0045] For example, when the length of the container 2 in the direction of the central axis 2b is short, one reflecting section 5 can be adhered to the inner surface 2a of the container 2, as illustrated in Fig. 3(a). When the length of the container 2 in the direction of the central axis 2b is long, multiple reflecting sections 5 can be aligned and adhered to the inner surface 2a of the container 2 along the central axis 2b of the container 2. For example, two reflecting sections 5 can be aligned and adhered to the inner surface 2a of the container 2, as illustrated in Fig. 3(b).

[0046] In this case, it is preferable that the width of the reflective portion 5 is 1 m or less. If the width of the reflective portion 5 is 1 m or less, wrinkles are less likely to occur when the reflective portion 5 is bonded to the inner surface 2a of the container 2, thereby improving workability.

[0047] Furthermore, when multiple reflective portions 5 are arranged side by side, the periphery of a reflective portion 5 may be abutted against the periphery of an adjacent reflective portion 5 or may be overlapped. When the periphery of a reflective portion 5 is overlapped with the periphery of an adjacent reflective portion 5, the overlapped portion may be welded. Welding the overlapped portion can prevent the reflective portion 5 from peeling off. Furthermore, when the periphery of a reflective portion 5 is overlapped with the periphery of an adjacent reflective portion 5, the inner surface 2a of the container 2 is not exposed, and therefore corrosion of the inner surface 2a of the container 2 can be prevented.

[0048] Furthermore, the sheet-like reflective portion 5 can also be provided on the inner surface of the container 2 facing the window 3. The reflective portion 5 can be, for example, adhered to the inner surface facing the window 3 or joined using a double-sided tape. Even when the reflective portion 5 is provided on the inner surface facing the window 3, the thickness of the reflective portion 5 can be set to 300 μm or more and 1000 μm or less.

[0049] If the sheet-like reflecting portion 5 containing fluororesin is provided on the inner surface 2a of the container 2, the ultraviolet light that is irradiated into the internal space of the container 2 and heads toward the inner surface 2a of the container 2 can be easily reflected toward the fluid 301a in the internal space of the container 2. This can increase the efficiency of ultraviolet light utilization, thereby further improving the sterilization effect and further increasing the treatment flow rate. Furthermore, if a sheet-like reflecting portion 5 containing a fluororesin is further provided on the inner surface facing the window 3, the efficiency of using ultraviolet light can be further improved.

[0050] Although the sheet-like reflecting portion 5 has been exemplified above, a film-like reflecting portion 5a (corresponding to an example of the second reflecting portion) may also be provided. That is, at least one sheet-like reflecting portion 5 or film-like reflecting portion 5a may be provided on the inner surface of the container 2.

[0051] FIG. 4 is a schematic cross-sectional view illustrating the film-like reflecting portion 5a. 4, the film-like reflective portion 5a can be provided so as to cover the inner surface 2a of the container 2. The reflective portion 5a can be a film containing a resin having high reflectance to ultraviolet rays and high resistance to ultraviolet rays. The reflective portion 5a can be, for example, a film containing a silicone resin.

[0052] If the thickness of the reflective portion 5a is too thick, the reflective portion 5a becomes prone to peeling off from the inner surface 2a of the container 2. If the thickness of the reflective portion 5a is too thin, sufficient reflection of ultraviolet light cannot be obtained. Therefore, the thickness of the reflective portion 5a is preferably 30 μm or more and 70 μm or less. The film-like reflective portion 5a can also be provided on the inner surface of the container 2 facing the window 3. The thickness of the reflective portion 5a provided on the inner surface facing the window 3 is also preferably 30 μm or more and 70 μm or less.

[0053] The film-like reflective portion 5a can be formed, for example, by applying a molten resin to the inner surface 2a of the container 2 and heating it. For example, the resin applied to the inner surface 2a of the container 2 can be hardened by heating it at a temperature of 150° C. for about 1 hour to form the film-like reflective portion 5a. Also, for example, a molten resin can be applied to the inner surface 2a of the container 2 and the inner surface facing the window 3, and then heated and hardened to form a film-like reflective portion 5a on the inner surface 2a of the container 2 and the inner surface facing the window 3.

[0054] By providing the film-like reflecting portion 5a, it is possible to obtain the same effects as in the case where the sheet-like reflecting portion 5 described above is provided. That is, the ultraviolet light irradiated into the internal space of the container 2 and directed toward the inner surface 2a of the container 2 is easily reflected toward the fluid 301a in the internal space of the container 2. This increases the efficiency of use of the ultraviolet light, thereby enabling a further improvement in the sterilization effect and a further increase in the treatment flow rate. Furthermore, if a reflecting portion 5a is further provided on the inner surface facing the window 3, the efficiency of using ultraviolet light can be further improved. Furthermore, since the film-like reflective portion 5a is easier to form than, for example, bonding the sheet-like reflective portion 5, the productivity can be improved, and further the manufacturing cost can be reduced.

[0055] FIG. 5 is a schematic perspective view illustrating a fluid sterilization device 1a according to another embodiment. FIG. 6 is a schematic cross-sectional view of the fluid sterilization device 1a in FIG. 5 taken along line BB. As shown in FIG. 5, the fluid sterilization device 1a includes, for example, a container 2, a lid 13, a light source 14, and a reflecting portion 5.

[0056] The lid 13 has a plate shape and is provided at one end of the container 2 so as to be liquid-tight. The lid 13 can be attached detachably to the end of the container 2 via, for example, a sealing member or the like. The lid 13 closes the opening at the end of the container 2. The surface of the lid 13 facing the container 2 is exposed to the internal space of the container 2. A hole for inserting the light source 14 is provided in the center of the lid 13. The lid 13 is formed from a material that is resistant to ultraviolet light and the fluid 301a. The material of the lid 13 can be, for example, the same as the material of the container 2.

[0057] The light source 14 irradiates ultraviolet light into the internal space of the container 2. The light source 14 is provided, for example, in the lid 13 so as to be detachable. The light source 14 includes, for example, a discharge lamp 14a and a protective tube 14b. The discharge lamp 14a is provided inside the protective tube 14b. The discharge lamp 14a extends inside the protective tube 14b. The discharge lamp 14a may be provided, for example, coaxially with the protective tube 14b. There is no particular limitation on the discharge lamp 14a as long as it can irradiate ultraviolet rays. The discharge lamp 14a may be, for example, a barrier discharge lamp or a mercury lamp.

[0058] The protective tube 14b has a tubular shape with one end closed and the other end open. The protective tube 14b extends between the lid 13 and the end of the container 2 opposite to the lid 13 side. The protective tube 14b can be provided, for example, coaxially with the container 2. The space between the inner surface 2a of the container 2 and the protective tube 14b becomes a flow path through which the fluid 301a to be treated flows.

[0059] The ultraviolet light emitted from the discharge lamp 14a is irradiated through the protective tube 14b to the fluid 301a flowing inside the container 2. For this reason, the protective tube 14b is made of a material with high transmittance of ultraviolet light. For example, the protective tube 14b can be made of quartz glass or the like. Further, a part of the ultraviolet light irradiated to the inside of the container 2 is reflected by the reflecting portion 5 and is irradiated to the fluid 301 a flowing inside the container 2 . Fluid 301a flowing inside container 2 is irradiated with ultraviolet light, thereby sterilizing fluid 301a.

[0060] Although the above describes an example in which a sheet-like reflecting portion 5 is provided, the same applies to a case in which a film-like reflecting portion 5a is provided.

[0061] The fluid sterilization device 1a according to this embodiment can provide the same effects as the above-mentioned fluid sterilization device 1. That is, the light source can be appropriately selected from those capable of irradiating ultraviolet rays. For example, the light source may be one equipped with a light emitting element such as a light emitting diode, or one equipped with a discharge lamp.

[0062] Although some embodiments of the present invention have been illustrated above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, modifications, etc. can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims. In addition, the above-mentioned embodiments can be implemented in combination with each other. [Explanation of symbols]

[0063] REFERENCE SIGNS LIST 1 Fluid sterilization device, 1a Fluid sterilization device, 2 Container, 2a Inner surface, 3 Window, 4 Light source, 41 Light emitting element, 5 Reflection portion, 5a Reflection portion, 13 Lid, 14 Light source, 14a Discharge lamp, 14b Protective tube, 301a Fluid, 301b Fluid

Claims

1. a container having a space therein through which a fluid to be treated can flow, containing a metal, and having a shape extending in one direction; a light source capable of irradiating the space of the container with ultraviolet light; A plurality of first reflecting portions or second reflecting portions provided on an inner surface of the container; Equipped with the plurality of first reflecting portions are sheet-shaped, contain fluororesin, and are aligned and bonded or joined to the inner surface of the container along a central axis of the container; The thickness of each of the plurality of first reflecting portions is 300 μm or more and 1000 μm or less, A fluid sterilization device, wherein the second reflecting portion is a thermosetting film containing a silicone resin and is provided on the inner surface of the container along the central axis of the container.

2. The fluid sterilization device includes a plurality of first reflecting portions, The fluid sterilization device according to claim 1 , wherein each of the plurality of first reflecting portions has a length of 1 m or less in the direction of the central axis of the container.

3. The fluid sterilization device includes the plurality of first reflecting portions, The fluid sterilization device according to claim 1 or 2, wherein a periphery of the first reflecting portion is abutted against or overlapped with a periphery of an adjacent first reflecting portion.

4. The fluid sterilization device includes a plurality of first reflecting portions, The fluid sterilization device according to any one of claims 1 to 3, wherein each of the plurality of first reflecting portions is joined to the inner surface of the container by at least one of a double-sided tape and a fastening member.

5. The fluid sterilization device includes the second reflecting portion, 2. The fluid sterilization device according to claim 1, wherein the second reflecting portion has a thickness of 30 μm or more and 70 μm or less.

Images