Sterilization device

Abstract

To provide a sterilizer capable of sterilizing a fluid by effectively irradiating it with ultraviolet rays.SOLUTION: A sterilizer includes: a substantially spherical reservoir for containing a fluid; a supply port for supplying the fluid into the reservoir; an extraction port for taking out the fluid from the reservoir; and a light source for irradiating ultraviolet rays. The reservoir includes: a substantially hemispherical first reservoir positioned upstream in a flow direction of the fluid in the supply port;, and a substantially hemispherical second reservoir positioned downstream. When the supply port and the extraction port are projected onto a virtual plane perpendicular to an extending direction of the inner surface of a supply channel connected to the reservoir at the supply port, a center of gravity of the supply port and a center of gravity of the extraction port are separated. The light source is arranged such that its optical axis is at 75° to 105° with respect to a straight line connecting the center of gravity of the reservoir and the center of gravity of the extraction port.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a sterilization device that sterilizes a fluid by irradiating the fluid with ultraviolet light. [Background technology]

[0002] It is widely known that ultraviolet light can be used to sterilize fluids such as liquids. For example, Patent Document 1 describes a fluid sterilization device that irradiates an axially extending flow path with ultraviolet light in the axial direction to sterilize the fluid flowing through the flow path.

[0003] Specifically, the fluid sterilization device described in Patent Document 1 includes a light source including a semiconductor light-emitting element that emits ultraviolet light, and a housing having a flow path through which the fluid to be sterilized flows in an axial direction. The light source is disposed at one axial end of the housing. The housing has a tapered structure in which the cross-sectional area of ​​the flow path gradually increases from the one end to the other end. The tapered structure has an inclination that matches the orientation angle of the semiconductor light-emitting element. In addition, a rectifying means for regulating the flow of the fluid is provided at the other end of the housing.

[0004] Patent Document 1 states that the housing has a tapered structure with an inclination that matches the orientation angle of the semiconductor light-emitting element, which allows ultraviolet rays to reach positions far from the light source, and that by irradiating ultraviolet rays onto a fluid whose flow has been regulated by a rectifying means, the ultraviolet rays are irradiated evenly onto the fluid, thereby enhancing the sterilization effect. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 2019-98055 Summary of the Invention [Problem to be solved by the invention]

[0006] The sterilization device described in Patent Document 1 has room for improvement in terms of effectively irradiating the fluid with ultraviolet rays.

[0007] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a sterilization device that can sterilize a fluid by effectively irradiating it with ultraviolet light. [Means for solving the problem]

[0008] A sterilization device according to one embodiment of the present invention is a sterilization device that irradiates a fluid with ultraviolet light to sterilize the fluid, and includes: a substantially spherical storage portion for storing the fluid; a supply port that opens into the storage portion and supplies the fluid into the storage portion; an outlet that opens into the storage portion and removes the fluid from the storage portion; and a light source for irradiating ultraviolet light into the storage portion, wherein the storage portion includes a substantially hemispherical first storage portion located upstream in a flow direction of the fluid at the supply port. and a substantially hemispherical second storage portion located downstream, wherein the supply port opens into the first storage portion and the outlet opens into the second storage portion, and when the supply port and the outlet are projected onto an imaginary plane perpendicular to the extending direction of the inner surface of a supply flow path connected to the storage portion at the supply port, the center of gravity of the supply port and the center of gravity of the outlet are spaced apart, and the light source is positioned so that its optical axis forms an angle of 75° to 105° with respect to a line connecting the center of gravity of the storage portion and the center of gravity of the outlet. [Effects of the Invention]

[0009] According to the present invention, it is possible to provide a sterilization device that can sterilize a fluid by effectively irradiating it with ultraviolet light. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a perspective view of a sterilizer according to an embodiment. [Figure 2] FIG. 2 is a cross-sectional perspective view of the sterilization device according to the embodiment. [Figure 3] FIG. 3 is a projection diagram showing the positional relationship between the supply port and the outlet when the supply port, the outlet, and the storage section are projected onto an imaginary plane. [Figure 4] FIG. 4 is a diagram showing the flow of fluid in the reservoir of the sterilizer according to the embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0011] Hereinafter, a sterilizer according to an embodiment of the present invention will be described.

[0012] (Configuration of sterilization device) Figures 1 and 2 are diagrams showing the configuration of a sterilization apparatus 100 according to one embodiment of the present invention. Figure 1 is a perspective view of the sterilization apparatus 100. Figure 2 is a cross-sectional perspective view of the sterilization apparatus 100. Figure 3 is a projection view showing the positional relationship between the supply port 216 and the outlet 217 when the supply port 216, the outlet 217, and the storage unit 210 are projected onto an imaginary plane (described below). Figure 4 is a diagram showing the flow of fluid in the storage unit 210.

[0013] 1 and 2, sterilization device 100 is a sterilization device that sterilizes a fluid by irradiating the fluid with ultraviolet light, and has an inner wall 110, a window 120, a light source 130, an outer wall 140, and a sealing member 150. In addition to the above configuration, sterilization device 100 of this embodiment further has a supply unit 170 and an extraction unit 180.

[0014] Inner wall 110 constitutes storage section 210, irradiation port 215, supply port 216, and outlet 217. Storage section 210 is a substantially spherical space disposed inside inner wall 110 for containing a fluid. Irradiation port 215 is a through-hole that opens to storage section 210 and the outside and introduces ultraviolet light from the outside (light source 130) into storage section 210. Supply port 216 is a through-hole that opens to storage section 210 and the outside and is used to supply a fluid into storage section 210. Outlet 217 is a through-hole that opens to storage section 210 and the outside and is used to remove the fluid from within storage section 210.

[0015] The inner diameter W1 of the storage portion 210 is not particularly limited. The inner diameter W1 of the storage portion 210 is, for example, about 10 to 60 mm. By setting the inner diameter W1 of the storage portion 210 to about 10 to 60 mm, the fluid inside the inner wall portion 110 can be sufficiently sterilized even when only one UV-C LED is used as the light source 130.

[0016] The inner diameter of irradiation port 215 is preferably 20 to 50% of the inner diameter W1 of storage portion 210. By increasing the inner diameter of irradiation port 215, ultraviolet rays can be directly irradiated onto a wide range of storage portion 210. On the other hand, by decreasing the inner diameter of irradiation port 215, the proportion of the ultraviolet reflective surface that occupies the inner surface of storage portion 210 can be increased.

[0017] The inner wall portion 110 may be made up of one member or a plurality of members. In this embodiment, the inner wall portion 110 is made up of two members, a first inner wall portion 111 and a second inner wall portion 112. The inner wall portion 110 also forms a storage portion 210, an irradiation port 215, a supply port 216, and an outlet port 217.

[0018] First inner wall portion 111 constitutes supply port 216 and substantially hemispherical first reservoir 211 located upstream in the flow direction of the fluid at supply port 216 (the direction of arrow A shown in FIG. 2). Supply port 216 is connected to supply flow path 270.

[0019] Second inner wall portion 112 constitutes outlet 217, irradiation port 215, and substantially hemispherical second reservoir 212 located downstream in the flow direction of the fluid at supply port 216 (the direction of arrow A in FIG. 2). An outlet flow path 280 is connected to outlet 217. Irradiation port 215 is covered with window 120, through which ultraviolet light emitted from light source 130 passes. In this embodiment, an annular groove 114 is arranged on the outer surface of second inner wall portion 112.

[0020] In the above description, supply port 216 is present in first inner wall portion 111, and outlet 217 is present in second inner wall portion 112; however, the aspects of supply port 216 and outlet 217 are not limited to this. Supply port 216 may be configured to extend across first inner wall portion 111 and second inner wall portion 112, and outlet 217 may be configured to extend across second inner wall portion 112 and first inner wall portion 111. In other words, supply port 216 may open across first storage portion 211 and second storage portion 212, and outlet 217 may open across second storage portion 212 and first storage portion 211.

[0021] The annular groove 114 is a groove for positioning the sealing member 150. The shape of the annular groove 114 is not particularly limited as long as the sealing member 150 can be appropriately positioned within a range that does not obstruct the light from the light source 130. In the present embodiment, the annular groove 114 is disposed so as to surround the irradiation port 215. Because the sealing member 150 can be deformed to match the shape of the annular groove 114, the shape of the annular groove 114 may be the same as or different from the shape of the sealing member 150. In the present embodiment, the planar shape of the annular groove 114 is elliptical, and the circular sealing member 150 is deformed to fit into this.

[0022] The inner wall 110 is formed of a material that will not deform or break due to the pressure of the flowing fluid. Examples of materials for the inner wall 110 include metals such as aluminum and resins such as polytetrafluoroethylene (PTFE). In addition, from the viewpoint of efficiently irradiating the fluid inside the inner wall 110 with ultraviolet light, the inner surface of the inner wall 110 preferably includes an ultraviolet reflective surface that has a reflectance of 80% or more for ultraviolet light irradiated from the light source 130. Examples of materials for the ultraviolet reflective surface include aluminum and polytetrafluoroethylene (PTFE), which have high reflectance for ultraviolet light. In addition, the ultraviolet reflective surface may be formed by applying an ultraviolet reflective paint or forming an ultraviolet reflective film on the inner surface of the inner wall 110. In this embodiment, the material for both the inner wall 110 (the first inner wall 111 and the second inner wall 112) is PTFE.

[0023] Window 120 is disposed so as to cover irradiation port 215. The shape of window 120 is not particularly limited as long as it allows ultraviolet light emitted from light source 130 to pass through storage portion 210. The shape of window 120 may be flat, or may be a shape that matches the inner surface of storage portion 210. In this embodiment, window 120 has a flat shape. The size of window 120 is not particularly limited as long as it can completely block irradiation port 215 and allow sealing member 150 to be appropriately positioned between inner wall portion 110 and window 120.

[0024] The material of window 120 is not particularly limited as long as it can transmit ultraviolet light and has the necessary strength. From the viewpoint of improving sterilization performance, the material of window 120 is preferably a material that transmits ultraviolet light with a wavelength of 200 nm or more and 350 nm or less, and more preferably a material that transmits ultraviolet light with a wavelength of 200 nm or more and 280 nm or less. Examples of materials for window 120 include quartz (SiO2), sapphire (Al2O3), and amorphous fluorine-based resin.

[0025] The light source 130 irradiates the fluid in the storage section 210 with ultraviolet light. The light source 130 may irradiate the fluid in the storage section 210 with ultraviolet light directly, or may irradiate the fluid in the storage section 210 with ultraviolet light via another member such as a window. In this embodiment, the light source 130 is fixed to the outer wall section 140 and irradiates the fluid in the storage section 210 with ultraviolet light through the window 120. More specifically, in this embodiment, the light source 130 is disposed on the second storage section 212 side. The type of light source 130 is not particularly limited as long as it can emit ultraviolet light. Examples of the light source 130 include a light-emitting diode (LED), a mercury lamp, a metal halide lamp, a xenon lamp, and a laser diode (LD). In this embodiment, the light source 130 is a light-emitting diode (LED). The wavelength of the ultraviolet light emitted by the light source 130 is not particularly limited. From the viewpoint of effective sterilization, the wavelength of the ultraviolet light emitted by light source 130 is preferably 200 nm or more and 350 nm or less, and more preferably 200 nm or more and 280 nm or less. That is, the ultraviolet light emitted from light source 130 is preferably ultraviolet C (UVC) light. Examples of commercially available light source 130 include NCSU334A (Nichia Corporation), which is an ultraviolet light emitting diode with a peak wavelength of 280 nm. Other examples of ultraviolet light emitting diodes with a peak wavelength of 280 nm include KLARAN (Asahi Kasei Corporation) and ZEU110BEAE (Stanley Electric Co., Ltd.).

[0026] Although the embodiment in which the light source 130 is disposed on the second storage section 212 side has been described above, the sterilization device of the present invention is not limited to this embodiment. The light source 130 may be disposed on the first storage section 211 side.

[0027] Light source 130 is preferably arranged so that its optical axis LA forms an angle of 75° to 105° with respect to a line connecting the center of gravity of storage section 210 and the center of gravity of outlet 217 (more precisely, the opening of outlet 217 to storage section 210), more preferably 80° to 100°, and even more preferably 85° to 95°. As shown in FIG. 4, in this embodiment, optical axis LA is arranged so that it forms an angle of 90° with the above line. Furthermore, optical axis LA preferably intersects with the center of gravity of storage section 210. By arranging light source 130 in this manner, ultraviolet light can be efficiently irradiated onto the fluid.

[0028] In this embodiment, the center of gravity of the storage unit 210 and the center of gravity of the outlet 217 are as follows. That is, as shown in FIG. 3, when the outlet 217 (its opening) and the storage unit 210 are projected onto an imaginary plane perpendicular to the extension direction (the direction of arrow A in FIG. 2) of the inner surface of the supply flow path 270 connected to the storage unit 210 at the supply port 216, they are both circular. Therefore, in this embodiment, the center of gravity of the outlet 217 (its opening) coincides with the center of the outlet 217 (its opening), and the center of gravity of the storage unit 210 coincides with the center of the storage unit 210. Also, as shown in FIG. 4, in this embodiment, the center of gravity of the outlet 217 is the intersection X between the center line L of the outlet flow path 280 and the imaginary surface of the sphere of the storage unit 210. Also, the optical axis LA refers to the central ray of the three-dimensional emitted light beam from the light source 130.

[0029] 4, within storage unit 210, the fluid flowing from supply port 216 to outlet 217 tends to rotate around a central axis that is a straight line connecting the center of gravity of storage unit 210 and the center of gravity of outlet 217. By arranging light source 130 as described above, ultraviolet light is irradiated at an angle of approximately 90° to the axis of rotation, enabling effective sterilization.

[0030] The angle of the above-mentioned rotation axis changes depending on factors such as the amount of fluid supplied into the storage section 210, but by positioning the light source 130 within the above-mentioned angle range, the optical axis LA is approximately 90° relative to the rotation axis, allowing ultraviolet light to be effectively irradiated onto the fluid.

[0031] The outer wall portion 140 covers the inner wall portion 110 and the window 120 and presses against the inner wall portion 110 and the window 120. In this embodiment, the outer wall portion 140 covers the light source 130 in addition to the inner wall portion 110 and the window 120. In this embodiment, the outer wall portion 140 has a first outer wall portion 141 and a second outer wall portion 142.

[0032] The first outer wall portion 141 covers the first inner wall portion 111 from the upstream side in the fluid flow direction. In this embodiment, the first outer wall portion 141 is arranged so as to cover the first inner wall portion 111 and a part of the second inner wall portion 112 on the first inner wall portion 111 side.

[0033] The second outer wall portion 142 covers the second inner wall portion 112 from the downstream side in the fluid flow direction. In this embodiment, the second outer wall portion 142 is arranged so as to cover a portion of the second inner wall portion 112 on the downstream side in the fluid flow direction. The second outer wall portion 142 also has a positioning step 143 that positions the window 120. The positioning step 143 is arranged so as to surround the irradiation port 215. The light source 130 is also arranged so as to face the window 120 positioned by the positioning step 143.

[0034] When the first outer wall portion 141 and the second outer wall portion 142 are joined, the first inner wall portion 111 and the second inner wall portion 112 are joined. In this embodiment, in the fluid flow direction, the joint portion between the first outer wall portion 141 and the second outer wall portion 142 does not coincide with the joint portion between the first inner wall portion 111 and the second inner wall portion 112. More specifically, in the fluid flow direction, the joint portion between the first outer wall portion 141 and the second outer wall portion 142 is located downstream of the joint portion between the first inner wall portion 111 and the second inner wall portion 112. The method of joining the first outer wall portion 141 and the second outer wall portion 142 is not particularly limited. In this embodiment, the first outer wall portion 141 and the second outer wall portion 142 are joined by fitting.

[0035] The sealing member 150 is an elastic member disposed between the inner wall portion 110 and the window 120, and seals the space between the inner wall portion 110 and the window 120. The sealing member 150 is disposed between the inner wall portion 110 and the window 120 so as to surround the irradiation port 215. The configuration of the sealing member 150 is not particularly limited as long as it can appropriately seal the space between the inner wall portion 110 and the window 120. The sealing member 150 is, for example, an O-ring or a packing. In this embodiment, the sealing member 150 is an O-ring. In this embodiment, the sealing member 150 (O-ring) is disposed in the annular groove 114 of the second inner wall portion 112. In this embodiment, the second inner wall portion 112, in which the sealing member 150 and the window 120 are disposed in this order, is housed in the second outer wall portion 142 to which the light source 130 is fixed.

[0036] The supply unit 170 supplies fluid into the storage unit 210 within the inner wall unit 110. The supply unit 170 has a supply flow path 270. One end of the supply flow path 270 is connected to a supply port 216 of the inner wall unit 110, and the other end is connected to a fluid supply device (not shown). The supply flow path 270 is preferably arranged so that the fluid can be smoothly supplied into the storage unit 210 along the wall of the storage unit 210. In this embodiment, at a first connection portion 271 between the inner surface of the supply flow path 270 and the inner surface of the storage unit 210 in a cross section along the flow direction of the fluid at the supply port 216 (the direction of arrow A in FIG. 2) and including the center of gravity of the storage unit 210, a part of the inner surface of the supply flow path 270 is arranged smoothly and continuously with the inner surface of the storage unit 210 so as to coincide with a tangent to the inner surface of the storage unit 210 at the first connection portion 271.

[0037] The extraction unit 180 extracts the sterilized fluid in the storage unit 210 inside the inner wall unit 110. The extraction unit 180 constitutes an extraction flow path 280. One end of the extraction flow path 280 is connected to the extraction port 217 of the inner wall unit 110, and the other end is connected to a fluid extraction device not shown. The extraction unit 180 is preferably arranged in a position in the storage unit 210 (second storage unit 212) where it is not directly reached by ultraviolet light emitted from the light source 130. The extraction flow path 280 is preferably arranged so that the fluid can be extracted from the storage unit 210 smoothly along the wall of the storage unit 210. In this embodiment, at second connection part 281 between the inner surface of extraction flow channel 280 and the inner surface of storage part 210 in a cross section along the flow direction of the fluid at extraction port 217 (the direction of arrow B in FIG. 2) and including the center of gravity of storage part 210, a part of the inner surface of extraction flow channel 280 is arranged smoothly and continuously with the inner surface of storage part 210 so as to coincide with a tangent to the inner surface of storage part 210 at second connection part 281. In this embodiment, supply flow channel 270 and extraction flow channel 280 are parallel to each other.

[0038] By eliminating steps at first connection 271 between the inner surface of supply flow path 270 and the inner surface of storage part 210, and at second connection 281 between the inner surface of extraction flow path 280 and the inner surface of storage part 210, it is possible to create a flow of fluid along the wall surface of spherical storage part 210, and to extract the fluid after retaining it while rotating it in a certain direction within storage part 210. This allows ultraviolet light to be uniformly irradiated onto the fluid, thereby enabling sufficient sterilization of the fluid.

[0039] The inner diameter W2 of the supply port 216 (supply flow path 270) and the inner diameter W3 of the outlet 217 (extraction flow path 280) are not particularly limited, but from the viewpoint of reducing fluid pressure loss while maintaining sterilization performance, they are preferably within a range of 25 to 40% of the inner diameter W1 of the storage unit 210. Increasing the inner diameter W2 of the supply port 216 and the inner diameter W3 of the outlet 217 can reduce fluid pressure loss in the sterilization device 100. On the other hand, reducing the inner diameter W2 of the supply port 216 and the inner diameter W3 of the outlet 217 can lengthen the time that the fluid supplied from the supply port 216 remains in the storage unit 210, thereby improving sterilization performance. More specifically, the inner diameter W2 of the supply port 216 (supply flow path 270) and the inner diameter W3 of the outlet 217 (extraction flow path 280) may be, for example, 10% or more of the inner diameter W1 of the storage unit 210.

[0040] As shown in FIG. 3, when supply port 216, outlet 217, and storage unit 210 are projected onto an imaginary plane perpendicular to the extending direction of the inner surface of supply flow path 270 connected to storage unit 210 at supply port 216 (the direction of arrow A in FIG. 2), supply port 216 and outlet 217 are arranged so that the center of gravity of supply port 216 and the center of gravity of outlet 217 are spaced apart. In this embodiment, supply port 216 and outlet 217 are arranged so that supply port 216 and outlet 217 are spaced apart when projected as described above. When supply port 216 and outlet 217 are arranged in this manner, as shown in FIG. 4, the fluid supplied from supply port 216 into storage unit 210 does not head straight to outlet 217, but instead turns around multiple times within storage unit 210 before reaching outlet 217. Therefore, the fluid is irradiated with a sufficient amount of ultraviolet light and is sufficiently sterilized before reaching outlet 217. In this embodiment, when projected as described above, window 120 (light source 130) is arranged so as not to overlap with supply port 216 and outlet 217. In this embodiment, when projected onto the virtual plane as shown in Fig. 4, supply port 216, outlet 217, and storage unit 210 are all circular. Therefore, the center of gravity of supply port 216 coincides with the center of supply port 216, the center of gravity of outlet 217 coincides with the center of outlet 217, and the center of gravity of storage unit 210 coincides with the center of storage unit 210.

[0041] Furthermore, in this embodiment, when supply port 216, outlet 217, and storage unit 210 are projected onto the above-mentioned imaginary plane as shown in Fig. 3, the angle α formed by the line connecting the center of gravity of supply port 216 and the center of gravity of storage unit 210 and the line connecting the center of gravity of outlet 217 and the center of gravity of storage unit 210 is preferably within a range of 75 to 165°, and more preferably within a range of 120 to 150°. By setting angle α within the above range, it is possible to further reduce the pressure loss of the fluid while maintaining sufficient sterilization performance. Here, the angle formed by the two lines means the smaller angle of the two angles formed by the two lines.

[0042] (How to use the sterilizer) Next, a method of using the sterilizer 100 according to this embodiment will be described.

[0043] With ultraviolet light being emitted from light source 130, a fluid to be sterilized (e.g., water) is introduced into storage unit 210 through supply port 216, and the fluid in storage unit 210 is removed through outlet 217. At this time, the fluid may be moved by pressurizing the supply port 216 (supply flow path 270) side, or by depressurizing the outlet 217 (exit flow path 280) side. As described above, in sterilization device 100 according to this embodiment, storage unit 210 has a substantially spherical shape, and supply port 216 and outlet 217 are arranged to satisfy predetermined conditions, so that the fluid to be sterilized swirls within storage unit 210. Furthermore, as described above, light source 130 is arranged so as to be at an angle of 75° to 105° with respect to a line connecting the center of gravity of storage unit 210 and the center of gravity of outlet 217 (the opening of the outlet 217). As a result, the fluid is removed from outlet 217 in a sufficiently sterilized state.

[0044] (effect) As described above, the sterilization device 100 according to this embodiment can sterilize fluids effectively by arranging the light source 130 as described above. [Industrial Applicability]

[0045] The sterilization device according to this embodiment is useful for sterilizing, for example, purified water, agricultural water, food washing water, various cleaning water, bath water, swimming pool water, and the like. [Explanation of symbols]

[0046] 100 Sterilizer 110 Inner wall 111 First inner wall 112 Second inner wall 114 Annular groove 120 Windows 130 Light source 140 Exterior wall 141 1st outer wall section 142 Second outer wall section 143 Positioning step 150 Sealing member 170 Supply section 180 Removal section 210 Storage section 211 First Storage Section 212 Second storage section 215 Irradiation port 216 Supply Inlet 217 Outlet 270 Supply Channel 271 First Connection 280 Extraction channel 281 Second Connection

Claims

1. A sterilization device that sterilizes a fluid by irradiating the fluid with ultraviolet light, a generally spherical reservoir for containing the fluid; a supply port that opens to the storage portion and supplies the fluid into the storage portion; an outlet that opens into the reservoir and is used to take out the fluid in the reservoir; a light source for irradiating ultraviolet light into the storage portion; and the storage portion includes a substantially hemispherical first storage portion located upstream in a flow direction of the fluid at the supply port, and a substantially hemispherical second storage portion located downstream, the supply port opens into the first storage section, The outlet opens into the second storage section, when the supply port and the outlet are projected onto an imaginary plane perpendicular to an extending direction of an inner surface of a supply flow path connected to the storage portion at the supply port, a center of gravity of the supply port and a center of gravity of the outlet are spaced apart from each other, The light source is arranged so that its optical axis is at an angle of 75° to 105° with respect to a line connecting the center of gravity of the storage section and the center of gravity of the outlet, Sterilization equipment.

2. The sterilizer according to claim 1 , wherein the center of gravity of the storage section is spaced apart from a straight line connecting the center of gravity of the supply port and the center of gravity of the take-out port.

3. The sterilizer according to claim 2 , wherein the center of gravity of the storage section is not located between the supply port and the discharge port.

4. The sterilization device according to any one of claims 1 to 3, wherein the outlet is arranged at a position where ultraviolet light emitted from the light source does not directly reach.

5. The sterilizer according to any one of claims 1 to 4, wherein the light source is disposed on a side of the second storage section.

6. The wall constituting the storage section includes a window that transmits ultraviolet light, The light source irradiates ultraviolet light into the storage portion through the window. The sterilization device according to any one of claims 1 to 5.

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