JP7128755B2 - Fluid sterilizer - Google Patents

Description

The present invention relates to technology for sterilizing fluids by irradiating them with ultraviolet light.

2. Description of the Related Art There is known a fluid sterilization apparatus that sterilizes a fluid such as water in a processing container by irradiating it with ultraviolet light. A configuration is known in which a cleaning brush with blades is provided in the processing container, and the cleaning brush is slid and rotated using the flow of fluid to remove deposits in the processing container that may occur during use of the apparatus. (See, for example, Patent Document 1).

JP 2014-131787 A

When the inside of the processing container is cleaned using the flow of fluid, the cleaning power may be lowered depending on the state of the flow. It is preferable that the inside of the processing container can be easily cleaned regardless of the flow state.

The present invention has been made in view of these problems, and one of its exemplary purposes is to provide a fluid sterilizer whose inside can be easily washed.

A fluid sterilizer according to one aspect of the present invention comprises a straight pipe defining a processing channel, a flow opening extending in a direction intersecting with the longitudinal direction of the straight pipe, and a communicating passage connecting the flow opening and the processing flow channel. a housing surrounding the outer periphery of the end of the straight pipe; a window member fixed to the housing and facing the end of the straight pipe; a light source that regulates longitudinal and radial displacement of the straight pipe with respect to the housing, and a regulating member that allows the straight pipe to rotate in the circumferential direction with respect to the housing; a cleaning unit that is displaced from the surface of a member defining at least a part of the processing channel and the communication channel by rotating the straight tube relative to the body while contacting the surface of the member to clean the member.

According to this aspect, by rotating the straight pipe with respect to the housing, the dirt adhering to the surface of the member that partitions at least a part of the processing channel and the communication channel is removed by utilizing the force applied by the rotation. can be removed. For example, the inside of the fluid sterilizer can be easily cleaned simply by periodically rotating the straight pipe.

The cleaning section may include a straight tube side cleaning section. The straight pipe side cleaning unit may be fixed to the housing, and may be displaced with respect to the straight pipe by rotation of the straight pipe with respect to the housing to wash the straight pipe.

The straight pipe side cleaning portion may have an inner peripheral surface cleaning portion that extends longitudinally along the inner peripheral surface of the straight pipe and contacts the inner peripheral surface of the straight pipe.

The straight pipe side cleaning portion may have an outer peripheral surface cleaning portion that extends in the longitudinal direction along the outer peripheral surface of the straight pipe and contacts the outer peripheral surface of the straight pipe.

The straight pipe cleaning section may further have a mounting portion extending from the end of the straight pipe toward the housing along the window member and fixed to the housing.

The cleaning section may further include a housing-side cleaning section. The housing-side cleaning unit may be fixed to the straight pipe and displaced relative to the housing by rotation of the straight pipe with respect to the housing to wash at least one of the housing and the window member.

The regulating member may limit the range of rotation of the straight pipe with respect to the housing to prevent the straight pipe-side cleaning portion and the housing-side cleaning portion from reaching a rotation angle at which they come into contact with each other.

The cleaning section may include a housing-side cleaning section. The housing-side cleaning unit may be fixed to the straight pipe and displaced relative to the housing by rotation of the straight pipe with respect to the housing to wash at least one of the housing and the window member.

The housing-side cleaning part may have a window cleaning part that extends along the window member from the end of the straight pipe toward the central axis of the straight pipe and contacts the window member.

The light source may include a plurality of light emitting elements arranged along the window member. When the rotation angle of the straight tube with respect to the housing is a predetermined value, the window cleaning unit moves along the window member so as to pass through a position corresponding to the gap between the two adjacent light emitting elements in a plan view of the window member. May be extended.

A positioning mark may be provided on the outer peripheral surface of the straight pipe to indicate that the rotation angle of the straight pipe with respect to the housing is a predetermined value.

The housing-side cleaning section may have a housing inner surface cleaning section that extends in the longitudinal direction from the end of the straight pipe along the outer peripheral surface of the straight pipe and contacts the inner surface of the housing that defines the communication path. .

The contact portion of the cleaning portion that contacts the surface of the member that defines at least part of the processing channel and the communication channel may be made of fluororesin.

A rotating device may be provided outside the housing and the straight pipe and configured to apply a driving force to rotate the straight pipe with respect to the housing.

According to the present invention, the inside of the fluid sterilizer can be easily cleaned.

1 is a top view schematically showing the configuration of a fluid sterilizer according to an embodiment; FIG. FIG. 2 is a cross-sectional view schematically showing the configuration of the fluid sterilization device of FIG. 1; FIG. 2 is a cross-sectional view schematically showing the configuration of the fluid sterilization device of FIG. 1; FIG. 5 is a cross-sectional view showing a cleaning operation during rotation of the straight pipe; FIG. 5 is a cross-sectional view showing a cleaning operation during rotation of the straight pipe; FIG. 5 is a cross-sectional view schematically showing the configuration of a fluid sterilizer according to a modification; FIG. 11 is a cross-sectional view schematically showing the configuration of a fluid sterilizer according to another modification; FIG. 8 is a cross-sectional view schematically showing the configuration of the fluid sterilization device of FIG. 7; FIG. 5 is a cross-sectional view showing a cleaning operation during rotation of the straight pipe;

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the drawings. In the description, the same elements are denoted by the same reference numerals, and overlapping descriptions are omitted as appropriate.

FIG. 1 is a top view schematically showing the configuration of a fluid sterilizer 10 according to an embodiment. The fluid sterilizer 10 includes a straight pipe 20 and a first housing 30a and a second housing 30b provided at both ends of the straight pipe 20, respectively. The fluid sterilization device 10 is a device for sterilizing a fluid such as water flowing inside a straight pipe 20 by irradiating it with ultraviolet light. The fluid to be treated, for example, flows into the interior of the first housing 30a through the first flow pipe 16a, passes through the interior of the straight pipe 20 toward the second housing 30b as indicated by the arrow F, After that, it is discharged to the outside through the second flow pipe 16b.

The straight pipe 20 has a cylindrical shape and extends from the first housing 30a toward the second housing 30b. In this specification, the longitudinal direction in which the straight pipe 20 extends is sometimes referred to as the "axial direction", and the direction orthogonal to the axial direction is sometimes referred to as the "radial direction". Also, the direction around the central axis of the straight pipe 20 may be referred to as the "circumferential direction".

The straight pipe 20 is configured to be rotatable about the central axis of the straight pipe 20 with respect to the first housing 30a and the second housing 30b. The straight pipe 20 is attached to the first housing 30a by a first restricting member 50a, and is attached to the second housing 30b by a second restricting member 50b. The first restricting member 50a restricts axial and radial displacement of the straight pipe 20 with respect to the first housing 30a, while permitting circumferential rotation of the straight pipe 20 with respect to the first housing 30a. Similarly, the second restricting member 50b restricts axial and radial displacement of the straight pipe 20 with respect to the second housing 30b, while permitting circumferential rotation of the straight pipe 20 with respect to the second housing 30b. do.

Inside the fluid sterilizer 10, a cleaning section (details of which will be described later) is provided for removing dirt adhering to the inner surface of the straight pipe 20 and the inner surfaces of the first housing 30a and the second housing 30b. The cleaning unit is displaced ( for example sliding) to clean. The straight tube 20 can be rotated manually, for example.

The outer peripheral surface 22 of the straight pipe 20 is provided with a first alignment mark 28a and a second alignment mark 28b. The first alignment mark 28a and the second alignment mark 28b are for indicating the position of the straight pipe 20 in the circumferential direction or the origin of the rotation angle. The first regulating member 50a and the second regulating member 50b are provided with reference marks 58a and 58b corresponding to the alignment marks 28a and 28b of the straight pipe 20, respectively. During normal use for sterilization inside the straight pipe 20, the straight pipe 20 is rotated so that the alignment marks 28a, 28b of the straight pipe 20 and the reference marks 58a, 58b of the regulating members 50a, 50b are aligned. angle is set. When cleaning the inside of the fluid sterilizer 10, the straight pipe 20 is rotated so that the alignment marks 28a and 28b of the straight pipe 20 and the reference marks 58a and 58b of the regulating members 50a and 50b are displaced from each other.

FIG. 2 is a cross-sectional view schematically showing the configuration of the fluid sterilizer 10 of FIG. 1, and corresponds to the AA line cross-section of FIG. The fluid sterilizer 10 has a symmetrical configuration in the axial direction of the straight pipe 20, and the internal configurations of the first housing 30a and the second housing 30b are symmetrical on the paper surface of FIG. . Therefore, in the following description, the internal configuration of the first housing 30a will be mainly described in detail, and the description of the internal configuration of the second housing 30b will be omitted as appropriate. The members attached to the drawings with the suffix "a" indicate the structure on the side of the first housing 30a drawn on the left side of the paper, and the members with the suffix "b" on the paper , which is the structure on the side of the second housing 30b drawn on the right side of FIG.

The fluid sterilizer 10 includes a straight tube 20, a first housing 30a, a second housing 30b, a first light source 40a, a second light source 40b, a first window member 43a, and a second window member 43b. , a first regulating member 50 a , a second regulating member 50 b , and a cleaning unit 60 . The cleaning section 60 includes a straight tube side cleaning section 61 and a housing side cleaning section 70 . The straight pipe side cleaning section 61 has an inner peripheral surface cleaning section 62 . The housing-side cleaning section 70 has a first window cleaning section 72a and a second window cleaning section 72b.

The straight pipe 20 is a cylindrical member that partitions the processing channel 12 . The straight pipe 20 has a first end 21a and a second end 21b. A first housing 30a is provided at the first end 21a, and a second housing 30b is provided at the second end 21b. Although the material of the straight pipe 20 is not particularly limited, it is preferable that at least the inner peripheral surface 23 of the straight pipe 20 is made of a material having high durability and reflectance to ultraviolet light. The straight pipe 20 can be made of, for example, fluororesin such as polytetrafluoroethylene (PTFE).

The outer peripheral surface 22 of the straight pipe 20 is provided with a first outer peripheral groove portion 24a, a first outer peripheral concave portion 25a, a first outer peripheral engaging portion 26a, and a first alignment mark 28a. The inner peripheral surface 23 of the straight pipe 20 is provided with a first inner peripheral recessed portion 27a.

The first outer peripheral groove portion 24a is provided at the mounting position of the first restricting member 50a and is formed continuously in the circumferential direction. A first restricting member 50a is inserted into the first outer circumferential groove portion 24a, and the axial and radial displacement of the straight pipe 20 is restricted by the first restricting member 50a. The first restricting member 50a can rotate with respect to the straight pipe 20 along the first outer peripheral groove portion 24a.

The first outer peripheral recessed portion 25a is provided closer to the first end portion 21a than the first outer peripheral groove portion 24a. The first outer peripheral recessed portion 25a is formed continuously in the circumferential direction, and an O-ring 46a for sealing between the first housing 30a and the straight pipe 20 to partition the first communication passage 14a is arranged. be.

The first outer peripheral engaging portion 26a is a stepped portion provided closer to the first end portion 21a than the first outer peripheral recessed portion 25a and continuously formed in the circumferential direction. The first outer peripheral engaging portion 26a engages with the first projecting portion 36a of the first housing 30a to restrict axial displacement of the straight pipe 20 with respect to the first housing 30a.

The first inner peripheral recess 27a is provided at the first end 21a and extends axially along the inner peripheral surface 23 from the first end 21a. The first inner peripheral recessed portion 27a is a recessed portion for mounting the first window cleaning portion 72a. The first inner peripheral recessed portion 27a is not formed continuously in the circumferential direction, but is formed only at a specific position in the circumferential direction.

The first alignment mark 28a is provided at a position farther from the first end portion 21a than the first outer peripheral groove portion 24a, and is positioned outside the fluid sterilizer 10 when the first housing 30a and the first regulating member 50a are attached. exposed to. The alignment mark 28a is formed only at a specific position in the circumferential direction, for example, on the opposite side (that is, 180 degrees different positions).

The first housing 30a is provided so as to surround the outer circumference of the first end portion 21a of the straight pipe 20 . The first housing 30a includes a first body portion 31a and a first light source housing portion 32a. The first body portion 31a includes a first flow port 33a, a first communication opening 34a, a first straight pipe support opening 35a, a first protrusion 36a, a first window support opening 37a, and a first recess 38a. , and a first engaging hole 39a.

The first circulation port 33a is an opening extending in a direction (for example, radial direction) crossing the longitudinal direction of the straight pipe 20, and serves as an insertion port for the first circulation pipe 16a. The first communication opening 34 a is provided in the center of the first body portion 31 a and defines the first communication passage 14 a that connects the first flow port 33 a and the processing flow channel 12 . The radial opening width of the first communication opening 34 a is larger than the outer diameter of the straight pipe 20 , and the first communication opening 34 a is provided so that the first communication passage 14 a continuous in the circumferential direction is provided outside the outer peripheral surface 22 of the straight pipe 20 . A communication opening 34a is formed.

The first straight pipe support opening 35a is a circular opening extending in the axial direction. The first straight pipe support opening 35a supports the outer peripheral surface 22 of the straight pipe 20 by coming into contact with an O-ring 46a provided in the first outer peripheral concave portion 25a of the straight pipe 20, thereby restricting radial displacement of the straight pipe 20. . The radial opening width of the first straight pipe support opening 35 a is approximately the same as the outer diameter of the straight pipe 20 . The first protrusion 36a is provided at a position between the first communication opening 34a and the first straight pipe support opening 35a, and is formed so as to be continuous in the circumferential direction. The first projecting portion 36a engages with the first outer peripheral engaging portion 26a of the straight pipe 20 to restrict axial and radial displacement of the straight pipe 20 .

The first window support opening 37a is an axially extending circular opening. The first window support opening 37a is provided on the side opposite to the first straight pipe support opening 35a across the first communication opening 34a, and supports the first window member 43a. The radial opening width of the first window support opening 37a is approximately the same as the outer diameter of the first window member 43a. A first concave portion 38a is provided on a surface facing the light emitting surface 45a of the first window member 43a inside the first window support opening 37a. An O-ring 48a is arranged in the first concave portion 38a for sealing between the first main body portion 31a and the first window member 43a to partition the first communication path 14a.

The first engagement hole 39a is a mounting hole for inserting and fixing the tip of the first mounting portion 65a of the inner peripheral surface cleaning portion 62 . The first engagement hole 39a is provided at a position between the first end portion 21a of the straight pipe 20 and the first window member 43a, and is provided on the inner peripheral surface of the first communication opening 34a and the inner side of the first window support opening 37a. is provided so as to penetrate between the light exit surface 45a of the first window member 43a and the opposite surface. The first engagement hole 39a extends radially outward from the inner peripheral surface of the first communication opening 34a and then axially extends toward the first window support opening 37a to form an L shape. be done.

The first light source housing portion 32a is provided at a position further away from the straight tube 20 in the axial direction than the first main body portion 31a. The first light source accommodating portion 32a partitions the first light source chamber 18a in which the first light source 40a is accommodated, and is fixed by sandwiching the first window member 43a between the first main body portion 31a and the first light source accommodating portion 32a. do. The first light source accommodating portion 32a is fixed to the first main body portion 31a by, for example, a fastening member (not shown) such as a screw or bolt.

Although the material of the first housing 30a is not particularly limited, it is preferable that the material is highly durable against ultraviolet light. The first main body portion 31a is preferably made of a material having a lower ultraviolet light reflectance than the straight tube 20, and can be made of a fluorine resin such as polyvinylidene fluoride (PVDF). By using PVDF, which has a lower ultraviolet light reflectance than PTFE, as the material of the first housing 30a, the ultraviolet light is reflected on the inner surface of the first communication passage 14a, and passes through the first flow port 33a to the first housing 30a. can reduce the amount of ultraviolet light directed to the outside of the

The second housing 30b is provided so as to surround the outer circumference of the second end portion 21b of the straight pipe 20 . The second housing 30b includes a second body portion 31b and a second light source housing portion 32b. The second body portion 31b is configured similarly to the first body portion 31a described above, and the second light source housing portion 32b is configured similarly to the first light source housing portion 32a described above.

The first light source 40a is housed in the first light source chamber 18a and configured to axially irradiate the processing channel 12 with ultraviolet light UV through the first window member 43a. The first light source 40a has a plurality of light emitting elements 41a and a first substrate 42a. The light emitting element 41a is a so-called UV-LED (Ultra Violet-Light Emitting Diode), has a peak emission wavelength of 300 nm or less, and emits ultraviolet light in the vicinity of 260 nm to 290 nm, which is a wavelength with high sterilization efficiency. The plurality of light emitting elements 41a are arranged in an array on the mounting surface of the first substrate 42a. The first light source 40a may have a lens or a reflector (not shown) for adjusting the light distribution of the ultraviolet light output from each light emitting element 41a. The lens or reflector may be arranged between each light emitting element 41a and the first window member 43a, or may be integrated with the first window member 43a.

The first window member 43a is arranged between the first end portion 21a of the straight tube 20 and the first light source 40a, and partitions the first communication passage 14a and the first light source chamber 18a. The first window member 43a has a light incident surface 44a on which ultraviolet light from the first light source 40a is incident, and a light exit surface 45a opposite to the light incident surface 44a. The first window member 43a is made of a material having a high transmittance of ultraviolet light, such as silica glass (SiO ₂ ) or sapphire (Al ₂ O ₃ ).

The second light source 40b is housed in a second light source chamber 18b partitioned inside the second housing 30b, and configured to irradiate ultraviolet light in the axial direction toward the processing flow channel through the second window member 43b. be done. The second light source 40b is configured in the same manner as the first light source 40a described above.

The first restricting member 50a has a first circular opening 53a (see FIG. 3, which will be described later) that is inserted into the first outer peripheral groove portion 24a of the straight pipe 20, and is engaged with the first outer peripheral groove portion 24a. 30a. The first restricting member 50a is divided into upper and lower two members 51a and 52a. The first restricting member 50a attaches the first upper restricting member 51a from the upper side of the straight pipe 20, and after attaching the first lower restricting member 52a from the lower side of the straight pipe 20, the first upper restricting member 51a and the first lower restricting member 50a are attached. They are integrated by fixing the side regulating member 52a to the first housing 30a. The first restricting member 50a is fixed to the first housing 30a by a fastening member 59a (see FIG. 3) such as a screw or bolt.

The second restricting member 50b is inserted into the second outer peripheral groove portion 24b of the straight pipe 20, and is fixed to the second housing 30b while being engaged with the second outer peripheral groove portion 24b. The second restricting member 50b is configured similarly to the first restricting member 50a.

The straight pipe side cleaning part 61 cleans the surface of the straight pipe 20 by contacting the surface of the straight pipe 20 and sliding on the surface of the straight pipe 20 . The straight tube side cleaning section 61 is fixed to the first housing 30a and the second housing 30b, and when the straight tube 20 is rotated with respect to the housings 30a and 30b, the position of the straight tube side cleaning section 61 is changed. The straight pipe 20 rotates without changing . From a viewpoint based on the straight pipe 20, when the straight pipe 20 rotates with respect to the housings 30a and 30b, the straight pipe side cleaning part 61 displaces with respect to the straight pipe 20 and rubs the surface of the straight pipe 20. can be done. As a result, the straight pipe side cleaning section 61 can clean the straight pipe 20 by rotating the straight pipe 20 .

The straight pipe side cleaning section 61 includes an inner peripheral surface cleaning section 62 . The inner peripheral surface cleaning portion 62 has an inner peripheral surface contact portion 63, a support extension portion 64, a first attachment portion 65a, and a second attachment portion 65b. The inner peripheral surface contact portion 63 is displaced while being in contact with the inner peripheral surface 23 of the straight pipe 20 to remove dirt on the inner peripheral surface 23 . The inner peripheral surface contact portion 63 is configured by a brush, a squeegee, or the like. The support extension portion 64 extends axially along the inner peripheral surface 23 of the straight pipe 20 and supports the inner peripheral surface contact portion 63 . The axial length of the support extension portion 64 is longer than the axial length of the straight pipe 20 , and both ends of the support extension portion 64 project outside the both end portions 21 a and 21 b of the straight pipe 20 . be done. The first attachment portion 65a extends radially outward from the end portion of the support extension portion 64, and its tip end is inserted into the first engagement hole 39a and fixed. Similarly, the second attachment portion 65b extends radially outward from the end portion of the support extension portion 64, and its tip end is inserted into and fixed to the second engagement hole 39b of the second housing 30b.

The housing-side cleaning unit 70 is in contact with the surfaces of the housings 30a and 30b and the window members 43a and 43b, and slides on the surfaces of the housings 30a and 30b and the window members 43a and 43b to clean the housings 30a and 30b. and the surfaces of the window members 43a and 43b. The housing-side cleaning unit 70 is fixed to the straight pipe 20 , and when the straight pipe 20 is rotated with respect to the housings 30 a and 30 b, the housing-side cleaning unit 70 rotates together with the straight pipe 20 . At this time, since the positions of the housings 30a and 30b and the window members 43a and 43b do not change, the housing side cleaning unit 70 is displaced with respect to the housings 30a and 30b and the window members 43a and 43b. The surfaces of the window members 43a and 43b can be rubbed. As a result, the casing-side cleaning section 70 can clean the casings 30a and 30b and the window members 43a and 43b by rotating the straight pipe 20. FIG.

The housing-side cleaning section 70 includes a first window cleaning section 72a and a second window cleaning section 72b. The first window cleaning portion 72a has a first window contact portion 73a, a first support portion 74a, and a first mounting portion 75a. The first window contact portion 73a is displaced while being in contact with the light exit surface 45a of the first window member 43a to remove dirt from the light exit surface 45a. The first window contact portion 73a is composed of a brush, a squeegee, or the like. The first support portion 74a extends radially along the light exit surface 45a of the first window member 43a and supports the first window contact portion 73a. The radial lengths of the first window contact portion 73 a and the first support portion 74 a are approximately half the inner diameter (diameter) of the straight pipe 20 . The first support portion 74 a radially extends from the first end portion 21 a of the straight pipe 20 to the central axis C of the straight pipe 20 . The radial lengths of the first window contact portion 73a and the first support portion 74a may be longer than those shown in the drawings, and may extend beyond the central axis C in the radial direction. The radial length of the first window contact portion 73a and the first support portion 74a may be about 60% to 90% of the inner diameter of the straight pipe 20.

The first attachment portion 75a extends axially along the inner peripheral surface 23 of the straight pipe 20 and is attached to the first inner peripheral recessed portion 27a. The first attachment portion 75a is fixed near the first end portion 21a of the straight pipe 20 by a fastening member 76a such as a screw or bolt. The first attachment portion 75a may be attached to the outer peripheral surface 22 of the straight pipe 20, or may contact both the outer peripheral surface 22 and the inner peripheral surface 23 of the straight pipe 20 to sandwich the cylindrical wall of the straight pipe 20. It may be attached to the first end 21a in this way.

The second window cleaning section 72b is configured similarly to the first window cleaning section 72a. The second window cleaning part 72b is attached to the second end 21b of the straight pipe 20, and rotates the straight pipe 20 so as to clean the surface of the second window member 43b (the second light exit surface 45b). Configured.

The cleaning unit 60 is preferably made of a material having high durability against ultraviolet light, and is made of a resin material such as fluororesin or a metal material such as stainless steel. The contact portions such as the inner peripheral surface contact portion 63 and the first window contact portion 73a are preferably configured by brushes or squeegees made of fluororesin. Support portions such as the support extension portion 64 and the first support portion 74a are preferably made of a material having a high ultraviolet light reflectance, and more preferably made of PTFE. By configuring the supporting portion of the cleaning portion 60 with PTFE, it is possible to suppress attenuation of the amount of ultraviolet light inside the processing channel 12 due to the provision of the cleaning portion 60 .

In the configuration shown in FIG. 2, the fluid to be sterilized includes the first flow pipe 16a, the first flow port 33a, the first communication passage 14a, the processing channel 12, the second communication passage 14b, the second flow port. 33b passes through the second flow pipe 16b in order. The first light source 40a and the second light source 40b irradiate the fluid flowing through the processing channel 12 as indicated by the arrow F with ultraviolet light UV in the axial direction. As a result, the fluid is sterilized in the processing channel 12 .

FIG. 3 is a cross-sectional view schematically showing the configuration of the fluid sterilizer 10 of FIG. 1, and corresponds to the BB line cross-section of FIG. For ease of understanding, FIG. 3 shows a cross section of the straight pipe 20 and the inner peripheral surface cleaning portion 62, while showing the appearance of the first restricting member 50a as seen in the axial direction instead of a cross section. FIG. 3 also shows the arrangement of the plurality of light emitting elements 41a and the position of the first window cleaning portion 72a when the inside of the straight pipe 20 is viewed in the axial direction.

The plurality of light emitting elements 41a are arranged in a two-dimensional array in plan view in the axial direction, and are arranged in a square lattice as shown in the figure. The first window cleaning part 72a is arranged at a position not overlapping with the plurality of light emitting elements 41a arranged in an array, and extends so as to pass through a position corresponding to a gap between two adjacent light emitting elements 41a. there is The first window cleaning portion 72a is formed to have a narrow width in the circumferential direction so as to fit within a range corresponding to the gap between the light emitting elements 41a. By arranging the first window cleaning part 72a at a position not overlapping the light emitting element 41a, it is possible to suppress a decrease in the amount of ultraviolet light inside the processing channel 12 due to the provision of the first window cleaning part 72a.

The arrangement of the plurality of light emitting elements 41a is not limited to a square lattice, and may be arranged in a triangular lattice, arranged in concentric circles, or arranged irregularly. In any case, it is preferable that the first window cleaning part 72a be arranged so as to be within a range corresponding to the gaps between the plurality of light emitting elements 41a. In the illustrated example, the first window cleaning part 72a extends linearly in the radial direction, but it may be configured to bend in the middle. For example, the first window cleaning part 72a may extend along the first window member 43a while bending so as to weave through the gaps between the plurality of light emitting elements 41a according to the arrangement of the plurality of light emitting elements 41a.

The first restricting member 50 a has a first inner protrusion 54 a that protrudes radially inward from a first circular opening 53 a that engages with the first outer peripheral groove 24 a of the straight pipe 20 . The first inner protruding portion 54a is provided on the opposite side of the inner peripheral surface cleaning portion 62 across the cylindrical wall of the straight pipe 20, and is provided so as to coincide with the inner peripheral surface cleaning portion 62 in the circumferential direction. .

The straight pipe 20 has a first outer protruding portion 29a protruding radially outward from the first outer peripheral groove portion 24a at a portion in the circumferential direction. It can also be said that the first outer projecting portion 29a is a portion that remains at the same height as the outer peripheral surface 22 of the straight pipe 20 by not partially forming the first outer peripheral groove portion 24a in the circumferential direction. The first outer projecting portion 29a is provided so as to coincide with the position of the first window cleaning portion 72a in the circumferential direction.

The first inner protruding portion 54a and the first outer protruding portion 29a limit the rotation range of the straight pipe 20, and the rotation of the straight pipe 20 causes the inner peripheral surface cleaning portion 62 and the first window cleaning portion 72a to come into contact with each other. to prevent it from being damaged. Specifically, when the straight pipe 20 is rotated about 180 degrees from the state shown in FIG. This prevents the straight pipe 20 from further rotating to a rotation angle at which the inner peripheral surface cleaning portion 62 and the first window cleaning portion 72a come into contact with each other.

FIG. 4 is a cross-sectional view schematically showing rotation of the straight pipe 20, and shows a state when the straight pipe 20 is rotated clockwise as indicated by an arrow R1 from the state shown in FIG. In FIG. 4, since the first outer projecting portion 29a is in contact with the left side of the first inner projecting portion 54a, the straight pipe 20 is removed at a position before the first window cleaning portion 72a collides with the inner peripheral surface cleaning portion 62. rotation stops. By limiting the clockwise rotation range of the straight pipe 20 in this way, it is possible to prevent damage due to contact between the inner peripheral surface cleaning portion 62 and the first window cleaning portion 72a. The clockwise rotation indicated by the arrow R1 causes the first window cleaning portion 72a to clean the hatched region P1 corresponding to approximately the left half of the light emitting surface 45a of the first window member 43a. Further, due to the rotation indicated by the arrow R1, the inner peripheral surface cleaning portion 62 cleans the range indicated by the thick line Q1 corresponding to approximately half of the inner peripheral surface 23 of the straight pipe 20 .

FIG. 5 is a cross-sectional view schematically showing the rotation of the straight pipe 20, in which the straight pipe 20 is rotated counterclockwise from the state shown in FIG. 3 as indicated by an arrow R2. Shows what it looks like when you move it. In FIG. 5, since the first outer projecting portion 29a is in contact with the right side of the first inner projecting portion 54a, the straight pipe 20 is removed at a position before the first window cleaning portion 72a collides with the inner peripheral surface cleaning portion 62. rotation stops. By similarly limiting the clockwise rotation range of the straight pipe 20 in this way, it is possible to prevent damage due to contact between the inner peripheral surface cleaning portion 62 and the first window cleaning portion 72a. Due to the counterclockwise rotation indicated by the arrow R2, the first window cleaning portion 72a cleans the shaded area P2 corresponding to about the right half of the light emitting surface 45a of the first window member 43a. Further, due to the rotation indicated by the arrow R2, the inner peripheral surface cleaning portion 62 cleans the range indicated by the thick line Q2 corresponding to the remaining half of the inner peripheral surface 23 of the straight pipe 20 .

By combining the clockwise rotation of FIG. 4 and the counterclockwise rotation of FIG. . In addition, substantially the entire region of the light exit surface 45a of the first window member 43a through which the ultraviolet light directed from the first light source 40a to the inside of the straight pipe 20 is transmitted can be cleaned using the first window cleaning portion 72a. Similarly, substantially the entire region of the light exit surface 45b of the second window member 43b through which the ultraviolet light directed from the second light source 40b to the inside of the straight pipe 20 is transmitted can be cleaned using the second window cleaning portion 72b. Therefore, according to the present embodiment, the inner peripheral surface 23 of the straight pipe 20 and the light emitting surfaces 45a and 45b of the window members 43a and 43b can be adjusted simply by rotating the straight pipe 20 with respect to the housings 30a and 30b. Can be washed.

The force required to rotate the straight pipe 20 with respect to the housings 30a, 30b depends on the friction of the O-rings 46a, 46b sandwiched between the housings 30a, 30b and the straight pipe 20. FIG. When the straight pipe 20 is made of fluororesin such as PTFE, the friction against the O-rings 46a and 46b made of rubber or the like is small, and the O-rings 46a and 46b easily slide on the fluororesin. Therefore, the straight pipe 20 can be rotated without applying a very strong force. For example, even when the housings 30a and 30b are fixed to the installation location of the fluid sterilizer 10, only the straight pipe 20 is rotated with a relatively light force without moving the housings 30a and 30b. be able to. Therefore, according to the present embodiment, the inside of the fluid sterilizer 10 can be easily cleaned without removing the fluid sterilizer 10 from its installation location or disassembling it.

It should be noted that if the straight tube 20 is pivoted into the arrangement shown in FIGS. 4 or 5, the fluid sterilizer 10 would not be used as is, but would be returned to the initial arrangement shown in FIGS. is desirable. In the arrangement shown in FIG. 4 or 5, part of the light emitting elements 41a and the inner peripheral surface cleaning portion 62 overlap, and the inner peripheral surface cleaning portion 62 shields the ultraviolet light emitted toward the processing flow path 12. and the sterilization ability is reduced. According to this embodiment, a first alignment mark 28a and a first reference mark 58a are provided so that the straight tube 20 can be easily rotated back to the initial orientation shown in FIG. As shown in FIG. 2, the first alignment mark 28a is positioned on the opposite side of the central axis C from the first window cleaning portion 72a, that is, at a circumferential position relative to the first window cleaning portion 72a. provided 180 degrees apart. Also, as shown in FIG. 3, the first reference mark 58a is provided at a location that coincides with the position in the circumferential direction where the first inner protruding portion 54a and the inner peripheral surface cleaning portion 62 are provided. As a result, by aligning the positions of the first alignment mark 28a and the first fiducial mark 58a, the initial arrangement shown in FIGS. be able to.

The positions in the circumferential direction of the first outer protruding portion 29a and the first inner protruding portion 54a, which regulate the rotation range of the straight pipe 20, are not limited to the illustrated example. It can be arranged at any position in the circumferential direction as long as the rotation range in which the cleaning portion 72a can come into contact can be regulated. Similarly, the circumferential positions of the first alignment mark 28a and the first reference mark 58a are not limited to the illustrated example, and the initial positions shown in FIGS. can be arranged at any position in the circumferential direction.

FIG. 6 is a cross-sectional view schematically showing the configuration of a fluid sterilizer 110 according to a modification. This modification differs from the above-described embodiment in that the light source 140 is provided only on the side of the first housing 30a, and the light source is not provided on the side of the second housing 130b. In addition, in this modified example, there are more locations that can be cleaned by the cleaning unit 160 than in the above-described embodiment, and the outer peripheral surface 22 of the straight pipe 20 and the inner peripheral surfaces of the communication openings 34a and 34b of the housings 30a and 130b are also cleaned. configured to allow In the following, this modified example will be described with a focus on the differences from the above-described embodiment.

The fluid sterilizer 110 includes a straight pipe 20, a first housing 30a, a second housing 130b, a light source 140, a window member 143a, a facing member 143b, a first restricting member 50a, and a second restricting member. 50 b and a cleaning unit 160 . The cleaning section 160 includes a straight tube side cleaning section 161, a first housing side cleaning section 170a, and a second housing side cleaning section 170b.

The second housing 130b includes a second body portion 31b and an opposing member fixing portion 132b. The second body portion 31b is configured in the same manner as in the above-described embodiment. The opposing member fixing portion 132b is attached to the second main body portion 31b instead of the second light source housing portion 32b of the above-described embodiment. The opposing member 143b is sandwiched between the second body portion 31b and the opposing member fixing portion 132b. The facing member 143b is provided so as to face the second end 21b of the straight pipe 20 . The facing member 143b has a facing surface 145b that faces the second end 21b of the straight pipe 20 . The opposing member 143b is preferably made of a member having a high ultraviolet light reflectance, and is made of a fluorine resin such as PTFE.

The light source 140 is housed in the first light source chamber 18a, like the first light source 40a described above. The light source 140 includes a plurality of light emitting elements 141 arranged in an array on the mounting surface of the substrate 142 and irradiates the processing flow path 12 with ultraviolet light in the axial direction. The window member 143a has a light incident surface 144a on which the ultraviolet light from the light source 140 is incident, and a light exit surface 145a opposite to the light incident surface 144a.

The straight tube cleaning portion 161 includes a first attachment portion 165a inserted into the first engagement hole 39a of the first housing 30a and a second attachment portion 165a inserted into the second engagement hole 39b of the second housing 130b. It has a portion 165b and is fixed to the housings 30a and 130b. The straight pipe side cleaning section 161 has an inner peripheral surface cleaning section 162, a first outer peripheral surface cleaning section 167a and a second outer peripheral surface cleaning section 167b. The inner peripheral surface cleaning portion 162 is configured in the same manner as the inner peripheral surface cleaning portion 62 of the above-described embodiment, and has an inner peripheral surface contact portion 163 and a support extension portion 164 .

The first outer peripheral surface cleaning part 167a comes into contact with the outer peripheral surface 22 of the straight pipe 20 located inside the first housing 30a, and slides against the outer peripheral surface 22 of the straight pipe 20 to clean the straight pipe 20. The outer peripheral surface 22 near the one end 21a is cleaned. The first outer peripheral surface cleaning portion 167a has a first outer peripheral surface contact portion 168a and a first outer peripheral support portion 169a. The first outer peripheral surface contact portion 168a is displaced while being in contact with the outer peripheral surface 22 in the vicinity of the first end 21a of the straight pipe 20, and removes dirt on the outer peripheral surface 22 thereof. The first outer peripheral surface contact portion 168a is configured by a brush, a squeegee, or the like. The first outer peripheral support portion 169a extends axially along the outer peripheral surface 22 of the straight pipe from the first mounting portion 165a and supports the first outer peripheral surface contact portion 168a.

The second outer peripheral surface cleaning part 167b comes into contact with the outer peripheral surface 22 of the straight pipe 20 located inside the second housing 130b, and slides against the outer peripheral surface 22 of the straight pipe 20 to clean the straight pipe 20. The outer peripheral surface 22 near the second end 21b is cleaned. The second outer peripheral surface cleaning portion 167b has a second outer peripheral surface contact portion 168b and a second outer peripheral surface support portion 169b, and is configured in the same manner as the first outer peripheral surface cleaning portion 167a. The second outer peripheral surface contact portion 168b is displaced while being in contact with the outer peripheral surface 22 in the vicinity of the second end 21b of the straight pipe 20, and removes dirt from the outer peripheral surface 22. As shown in FIG. The second outer peripheral support portion 169b extends axially along the outer peripheral surface 22 of the straight pipe from the second mounting portion 165b and supports the second outer peripheral surface contact portion 168b.

The first housing-side cleaning section 170a has a first attachment section 175a and is fixed to a first inner circumferential recess 27a provided at the first end 21a of the straight pipe 20 using a first fastening member 76a. The first housing side cleaning section 170a has a window member cleaning section 172a and a first housing inner surface cleaning section 177a. The window member cleaning portion 172a is configured in the same manner as the first window cleaning portion 72a according to the above-described embodiment, and has a window contact portion 173a and a first radially extending portion 174a that supports the window contact portion 173a. The first housing inner surface cleaning portion 177a has a first housing inner surface contact portion 178a and a first axially extending portion 179a. The first housing inner surface contact portion 178a contacts the inner peripheral surface of the first communication opening 34a of the first housing 30a, slides against the inner peripheral surface of the first communication opening 34a, and cleans the inner peripheral surface. do. The first axially extending portion 179a axially extends from the first radially extending portion 174a to support the first housing inner surface contact portion 178a.

The second housing side cleaning section 170b is configured in the same manner as the first housing side cleaning section 170a described above. The second housing side cleaning section 170b has a facing member cleaning section 172b and a second housing inner surface cleaning section 177b. The facing member cleaning unit 172b is in contact with the facing surface 145b of the facing member 143b, and slides against the facing surface 145b to clean the facing surface 145b. The second housing inner surface cleaning part 177b is in contact with the inner peripheral surface of the second communication opening 34b of the second housing 130b, and slides against the inner peripheral surface of the second communication opening 34b to clean the inner peripheral surface. do.

According to this modification, by rotating the straight pipe 20, the surfaces of the members defining the communication paths 14a and 14b can be cleaned, and the outer peripheral surface 22 of the straight pipe 20 and the housings 30a and 30b can be communicated. The inner peripheral surfaces of the openings 34a, 34b can additionally be cleaned. Therefore, according to this modification, it is possible to increase the number of places that can be cleaned compared to the above-described embodiment, and it is possible to clean the inside of the fluid sterilizer 110 more preferably.

This modification may be applied to a configuration in which both the first light source 40a and the second light source 40b similar to those in the above-described embodiment are provided. Moreover, the cleaning unit 60 according to the above-described embodiment may be applied to a configuration in which only the light source 140 according to this modification is provided.

FIG. 7 is a cross-sectional view schematically showing the configuration of a fluid sterilizer 210 according to another modification. In this modification, the radial length of the first window cleaning portion 272a is longer than that in the above-described embodiment, and the washable range of the light exit surface 45a of the first window member 43a is as described above. It is configured to be wider than the embodiment. The same applies to the second window cleaning section 272b. In addition, in this modification, the width in the circumferential direction of the inner peripheral surface cleaning portion 262 of the straight pipe side cleaning portion 261 is larger than in the above-described embodiment, and the inner peripheral surface cleaning portion 262 covers the entire inner peripheral surface 23 of the straight pipe 20. is configured to be washable. In the following, this modified example will be described with a focus on the differences from the above-described embodiment.

The fluid sterilizer 210 includes a straight tube 20, a first housing 30a, a second housing 30b, a first light source 40a, a second light source 40b, a first window member 43a, and a second window member 43b. , a first restricting member 50 a , a second restricting member 50 b , and a cleaning section 260 . The cleaning section 260 includes a straight tube side cleaning section 261 and a housing side cleaning section 270 . The straight pipe side cleaning section 261 has an inner peripheral surface cleaning section 262 . The housing-side cleaning section 270 has a first window cleaning section 272a and a second window cleaning section 272b.

The inner peripheral surface cleaning portion 262 has an inner peripheral surface contact portion 263, a support extension portion 264, a first attachment portion 265a, and a second attachment portion 265b. The inner peripheral surface cleaning portion 262 is configured in the same manner as the inner peripheral surface cleaning portion 62 according to the above-described embodiment. perpendicular direction) is configured to be relatively large. On the other hand, the circumferential widths of the first attachment portion 265a and the second attachment portion 265b of the inner peripheral surface cleaning portion 262 are configured to be relatively small. Further, the first attachment portion 265a is provided at a position axially displaced from the first window contact portion 273a and the first support portion 274a of the first window cleaning portion 272a, so that when the straight pipe 20 rotates, it contacts the first window. It is arranged so as not to collide with the portion 273a or the first support portion 274a. Similarly, the second attachment portion 265b is provided at a position axially displaced from the second window contact portion 273b and the second support portion 274b of the second window cleaning portion 272b. It is arranged so as not to contact the contact portion 273b or the second support portion 274b.

The first window cleaning portion 272a has a first window contact portion 273a, a first support portion 274a, and a first mounting portion 275a. The first window contact portion 273a is composed of a brush, a squeegee, or the like that contacts the light exit surface 45a of the first window member 43a, and removes dirt on the light exit surface 45a. The first support portion 274a extends radially along the light exit surface 45a of the first window member 43a and supports the first window contact portion 273a. The first mounting portion 275a is inserted into a mounting hole 227a provided inside the cylindrical wall of the straight pipe 20, and fixed to the first end portion 21a of the straight pipe 20 with a fastening member 276a such as a screw or bolt. The mounting hole 227a extends axially from the end surface of the first end portion 21a of the straight pipe 20 . In this modified example, the first mounting portion 275a of the first window cleaning portion 272a and the inner peripheral surface cleaning portion 275b of the first window cleaning portion 272a and the inner peripheral surface cleaning portion 275a of the first window cleaning portion 272a when the straight pipe 20 rotates are accommodated inside the cylindrical wall of the straight pipe 20. The inner peripheral surface contact portion 263 of the portion 262 and the support extension portion 264 are kept from coming into contact with each other. The same applies to the second attachment portion 275b of the second window cleaning portion 272b.

The first window contact portion 273a and the first support portion 274a extend radially over at least a range corresponding to the outer diameter of the straight pipe 20 and protrude outward from the outer peripheral surface 22 of the straight pipe 20. direction. The first window contact portion 273a and the first support portion 274a extend radially over a range corresponding to the inner diameter of the first communication opening 34a of the first housing 30a, for example. The first window contact portion 273a and the first support portion 274a are provided at positions shifted in the axial direction with respect to the first attachment portion 65a of the straight pipe side cleaning portion 61, and the first window member 43a and the first attachment portion 274a It extends from the inside to the outside of the straight pipe 20 through the gap between the portions 65a. The same applies to the second window contact portion 273b and the second support portion 274b of the second window cleaning portion 272b.

FIG. 8 is a cross-sectional view schematically showing the configuration of the fluid sterilizer 210 of FIG. 7, and corresponds to the EE line cross-section of FIG. In FIG. 8, the hatching of the cross section of the first housing 30a is omitted for clarity of the drawing, and the straight pipe 20 and the first window cleaning part 272a are slightly rotated counterclockwise from the state of FIG. ing.

The first support portion 274a of the first window cleaning portion 272a is provided not only in a range corresponding to the inner diameter D1 of the straight pipe 20 and in a range corresponding to the outer diameter D2 of the straight pipe 20, but also to the first communicating portion of the first housing 30a. It extends radially to a range corresponding to the inner diameter D3 of the opening 34a. As a result, the first window cleaning part 272a is cleaned not only inside the circular area corresponding to the inner diameter D1 of the straight pipe 20 but also within the inner diameter D1 of the straight pipe 20 on the light exit surface 45a of the first window member 43a. The outer side of the corresponding circular area can also be cleaned, and the light exit surface 45a of the first window member 43a can be cleaned more preferably. More specifically, it is possible to wash substantially the entire area of the light exit surface 45a of the first window member 43a that is in contact with the fluid to be processed.

The circumferential width w1 of the inner circumferential surface contact portion 263 and the support extension portion 264 of the inner circumferential surface cleaning portion 262 is larger than the circumferential width w2 of the first mounting portion 265a. The width w1 of the inner peripheral surface contact portion 263 and the support extension portion 264 in the circumferential direction is, for example, w1 ≧w2+2×w3. The circumferential width w1 of the inner peripheral surface contact portion 263 and the support extension portion 264 is configured to be, for example, larger than the circumferential width of the first inner projecting portion 54a (see FIG. 3) of the regulating members 50a and 50b. be done. Thereby, the entire inner peripheral surface 23 of the straight pipe 20 can be cleaned.

FIG. 9 is a cross-sectional view showing the cleaning operation when the straight pipe 20 is rotated, and shows a state in which the straight pipe 20 shown in FIG. 8 is rotated approximately 180 degrees clockwise as indicated by an arrow R3. , shows a state similar to that of FIG. 4 in the above-described embodiment. In this modified example, the first window cleaning portion 272a extends over a range corresponding to the inner diameter D3 of the first communication opening 34a, so that the light exit surface of the first window member 43a is removed by rotating the straight pipe 20 halfway. A shaded region P3 corresponding to almost the entirety of 45a can be washed.

Further, in this modified example, the inner peripheral surface contact portion 263 and the support extension portion 264 of the inner peripheral surface cleaning portion 262 and the first window cleaning portion 272a do not come into contact with each other when the straight pipe 20 rotates. Therefore, as shown in FIG. 9, the straight pipe 20 can be rotated to a position where the inner peripheral surface contact portion 263 and the support extension portion 264 overlap with the first window cleaning portion 272a in the axial direction. In other words, the straight pipe 20 can be rotated to a position just before the first attachment portion 265a of the inner peripheral surface cleaning portion 262 and the first window cleaning portion 272a collide. Furthermore, since the width w1 in the circumferential direction of the inner peripheral surface contact portion 263 of the inner peripheral surface cleaning portion 262 is large, the inner peripheral surface 23 can be cleaned beyond the rotation range of the straight pipe 20, and the straight pipe 20 can be cleaned. A range of the thick line Q3 corresponding to more than half (180 degrees) of the inner peripheral surface 23 of the straight pipe 20 when rotated halfway can be cleaned. As a result, the entire inner peripheral surface 23 of the straight pipe 20 can be washed in combination with the counterclockwise rotation. Therefore, according to this modified example, the cleaning range of the inner peripheral surface 23 of the straight pipe 20 and the light emitting surfaces 45a and 45b of the window members 43a and 43b can be expanded more than in the above-described embodiment, and more preferable cleaning can be performed. realizable.

In this modification, the radial lengths of the first window contact portion 273a and the first support portion 274a may be shorter than illustrated. The radial lengths of the first window contact portion 273a and the first support portion 274a may be larger than the outer diameter D2 of the straight pipe 20 and smaller than the inner diameter D3 of the first communication opening 34a. The radial lengths of the first window contact portion 273a and the first support portion 274a may be approximately the same as the outer diameter D2 of the straight pipe 20, and may be equal to or less than the outer diameter D2 of the straight pipe 20 and may be larger than the inner diameter D1 of the

The present invention has been described above based on the examples. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that various design changes and modifications are possible, and that such modifications are within the scope of the present invention. It is about

In the above-described embodiment and modified example, the cleaning units 60, 160, 260 are provided with both the straight pipe side cleaning unit and the housing side cleaning unit. In a further modification, only one of the straight tube side cleaning section and the housing side cleaning section may be provided. In this case, the straight pipe 20 may be configured to rotate 360 degrees or more because contact between the straight pipe side cleaning portion and the housing side cleaning portion does not occur due to the rotation of the straight pipe 20 . For example, the first outer projecting portion 29a and the first inner projecting portion 54a shown in FIG. 3 may not be provided, so that the rotation range of the straight pipe 20 is not restricted.

In the above-described embodiment and modifications, the case where the straight pipe 20 is manually rotated has been described. In a further variant, a pivoting device may be provided that is configured to provide a driving force to pivot the straight tube 20 relative to the housing. The pivoting device may be configured to transmit rotational force to the outer peripheral surface 22 of the straight tube 20 . For example, the outer peripheral surface 22 of the straight pipe 20 may be partially formed with a concave-convex structure that serves as a gear, and the rotating device may be configured to rotate a drive gear that meshes with the gear on the outer peripheral surface 22 .

In the above-described embodiment and modifications, the case where only one straight pipe side cleaning section 61, 161, 261 is provided has been described. In a further modified example, a plurality of straight pipe side cleaning portions 61, 161, 261 may be provided, for example, at two or more different positions in the circumferential direction, such as 0 degrees, 60 degrees, 90 degrees, 120 degrees, 180 degrees, The straight tube side cleaning units 61 and 161 may be arranged at positions corresponding to two or more rotation angles of 240 degrees and 270 degrees. Similarly, a plurality of housing-side cleaning units 70, 170a, 170b may be provided, or housing-side cleaning units 70, 170a, 170b may be provided at two or more different positions in the circumferential direction. In this case, the rotation range of the straight pipe 20 may be further restricted to less than 60 degrees, less than 90 degrees, less than 120 degrees, or less than 180 degrees.

DESCRIPTION OF SYMBOLS 10... Fluid sterilization apparatus 12... Processing flow path 20... Straight tube 22... Outer peripheral surface 23... Inner peripheral surface 28a, 28b... Alignment mark 30a... First housing, 30b... Second housing, 33a, 33b... Distribution port 40a... First light source 40b... Second light source 41a... Light emitting element 43a... First window member 43b... Second window member 50a... First regulation member 50b... Second regulation Members 60... Cleaning part 61... Straight tube side cleaning part 62... Inner peripheral surface cleaning part 70... Case side cleaning part 72a... First window cleaning part 72b... Second window cleaning part.

Claims (14)

a straight pipe that partitions the processing flow path;
a housing that surrounds an outer circumference of an end of the straight pipe, defining a flow port extending in a direction intersecting the longitudinal direction of the straight pipe and a communicating passage that connects the flow port and the processing flow channel;
a window member fixed to the housing and facing the end of the straight pipe;
a light source that irradiates ultraviolet light toward the processing channel through the window member;
a regulating member that regulates longitudinal and radial displacement of the straight pipe with respect to the housing and allows circumferential rotation of the straight pipe with respect to the housing;
It is fixed to the housing or the straight pipe, and when the straight pipe rotates with respect to the housing, it is displaced with respect to the surface of a member that defines at least a part of the processing flow path and the communication path while contacting the surface of the member. and a cleaning unit that cleans by washing. The cleaning section includes a straight tube side cleaning section, and the straight tube side cleaning section is fixed to the housing and displaced relative to the straight tube by rotation of the straight tube with respect to the housing. 2. The fluid sterilizer of claim 1, for cleaning tubes. 3. The straight pipe side cleaning portion has an inner peripheral surface cleaning portion that extends in the longitudinal direction along the inner peripheral surface of the straight pipe and contacts the inner peripheral surface of the straight pipe. 3. The fluid sterilizer according to 2. 4. The straight pipe side cleaning portion has an outer peripheral surface cleaning portion that extends in the longitudinal direction along the outer peripheral surface of the straight pipe and contacts the outer peripheral surface of the straight pipe. The fluid sterilization device according to . The straight pipe side cleaning section further has a mounting portion extending from the end portion of the straight pipe toward the housing along the window member and fixed to the housing. Item 5. The fluid sterilization device according to any one of Items 2 to 4. The cleaning unit further includes a housing-side cleaning unit, and the housing-side cleaning unit is fixed to the straight pipe and displaced relative to the housing by rotation of the straight pipe relative to the housing. and at least one of the window member is cleaned. The restricting member restricts a rotation range of the straight pipe with respect to the housing, and prevents a rotation angle at which the straight pipe-side cleaning section and the housing-side cleaning section come into contact with each other. 7. A fluid sterilization device according to Item 6. The cleaning unit includes a housing-side cleaning unit, the housing-side cleaning unit is fixed to the straight pipe, and is displaced relative to the housing by rotation of the straight pipe relative to the housing. 2. The fluid sterilizer of claim 1, wherein at least one of said window members is cleaned. The housing-side cleaning section has a window cleaning section that extends along the window member from the end portion of the straight pipe toward the center axis of the straight pipe and contacts the window member. 9. A fluid disinfection device according to any one of claims 6-8. The light source includes a plurality of light emitting elements arranged along the window member,
When the rotation angle of the straight pipe with respect to the housing reaches a predetermined value, the window cleaning unit is configured to pass through a position corresponding to a gap between two adjacent light emitting elements in a plan view of the window member. 10. The fluid disinfector of claim 9, extending along the window member. 11. The fluid sterilizer according to claim 10, further comprising an alignment mark provided on the outer peripheral surface of the straight pipe and indicating that the rotation angle of the straight pipe with respect to the housing is the predetermined value. . The housing-side cleaning unit extends in the longitudinal direction from the end of the straight pipe along the outer peripheral surface of the straight pipe and is in contact with the inner surface of the housing that defines the communication path. 12. A fluid disinfection device according to any one of claims 6 to 11, characterized in that it comprises a portion. 13. The contact part of the cleaning part that contacts with the surface of the member that defines at least a part of the processing flow path and the communication path is made of fluororesin. The fluid sterilization device according to . 13. A rotating device provided outside the housing and the straight pipe and configured to provide a driving force for rotating the straight pipe with respect to the housing, further comprising a rotating device. A fluid sterilizer according to any one of the preceding claims.

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