JP2023010512A - Apparatus for processing fluid with ultraviolet light - Google Patents

Abstract

To provide an apparatus for processing a fluid with ultraviolet light capable of cooling a light source with the fluid while suppressing pressure loss of the fluid of a processing object by ultraviolet light from the light source.SOLUTION: An apparatus for processing a fluid with ultraviolet light includes: an inflow part and an outflow part of a fluid; a main flow path part for connecting the inflow part and the outflow part; an auxiliary flow path part connected to the main flow path part, and having a cross section area smaller than an area of a cross section of the main flow path part orthogonal to a fluid-flowing direction; a light source disposed between the main flow path part and the auxiliary flow path part, and capable of irradiating the main flow path part with ultraviolet light; and a first connection part and a second connection part for connecting the auxiliary flow path part to a part of the main flow path part.SELECTED DRAWING: Figure 2

Description

The present invention relates to a fluid ultraviolet light treatment apparatus.

For example, Patent Literature 1 discloses a device that irradiates ultraviolet light emitted by a light emitting element into a flow path through which a fluid flows.

JP 2018-161247 A

SUMMARY OF THE INVENTION An object of the present invention is to provide a fluid ultraviolet light treatment apparatus capable of cooling the light source with the fluid while suppressing the pressure loss of the fluid to be treated due to the ultraviolet light from the light source.

According to one aspect of the present invention, the fluid ultraviolet light treatment device includes an inflow portion and an outflow portion for a fluid, a main flow passage portion connecting the inflow portion and the outflow portion, and a main flow passage portion connected to the main flow passage portion. a secondary channel portion having a smaller cross-sectional area than the cross-sectional area of the primary channel portion perpendicular to the flow direction; It has a light source capable of irradiating light, a first connecting portion to which the sub-channel portion is connected to a part of the main channel portion, and a second connecting portion.

ADVANTAGE OF THE INVENTION According to this invention, the fluid ultraviolet-light processing apparatus which can cool a light source with a fluid can be provided, suppressing the pressure loss of the fluid to be processed by the ultraviolet light from a light source.

1 is a perspective view of a fluidic ultraviolet light treatment apparatus according to one embodiment of the present invention; FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1; FIG. FIG. 4 is an exploded perspective view of the second end of the fluidic ultraviolet light treatment device of one embodiment of the present invention; FIG. 11 is a perspective view showing another example of the inner member of the second end portion of the fluidic ultraviolet light treatment apparatus according to one embodiment of the present invention; FIG. 4 is a schematic diagram of a first modification of the fluidic ultraviolet light treatment apparatus of one embodiment of the present invention; FIG. 4 is a schematic diagram of a second modification of the fluidic ultraviolet light treatment apparatus of one embodiment of the present invention; FIG. 4 is a schematic diagram of a third modification of the fluidic ultraviolet light treatment apparatus of one embodiment of the present invention; It is a perspective view showing an example of a light source of one embodiment of the present invention. FIG. 4 is a perspective view showing another example of the light source of one embodiment of the present invention; FIG. 4 is a perspective view showing another example of the light source of one embodiment of the present invention; 8 is an exploded perspective view of the light source shown in FIG. 7; FIG. FIG. 4 is a cross-sectional view of the fluid ultraviolet light treatment device showing a first example of the fluid retention action; 1 is a perspective view of a fluid ultraviolet light processing device showing a first example of fluid retention action; FIG. FIG. 10 is a cross-sectional view of the fluid ultraviolet light treatment device showing a second example of the fluid retention action; FIG. 10 is a cross-sectional view of the fluid ultraviolet light treatment device showing a third example of the fluid retention action; FIG. 11 is a cross-sectional view of the fluid ultraviolet light treatment device showing a fourth example of the fluid retention action; FIG. 11 is a cross-sectional view of the fluid ultraviolet light treatment device showing a fifth example of fluid retention action; FIG. 11 is a cross-sectional view of the fluid ultraviolet light treatment device showing a sixth example of the fluid retention action; It is the side view which looked at the fluid ultraviolet light processing apparatus from the inflow part side which shows the 7th example of the fluid retention effect|action. FIG. 17 is a cross-sectional view taken along line XVII-XVII of FIG. 16; FIG. 18 is a cross-sectional view taken along line XVIII-XVIII of FIG. 17;

Hereinafter, embodiments will be described with reference to the drawings. In each drawing, the same components are given the same reference numerals. Since each drawing schematically shows the embodiment, the scale, interval, positional relationship, etc. of each member may be exaggerated, or illustration of a part of the member may be omitted.

FIG. 1 is a perspective view of a fluid ultraviolet light processing device 1 according to one embodiment of the present invention. 2 is a cross-sectional view taken along line II-II of FIG. 1. FIG. In FIGS. 1 and 2, the three axes orthogonal to each other are the X-axis, the Y-axis, and the Z-axis. The cross section shown in FIG. 2 is parallel to the X-axis and Z-axis and perpendicular to the Y-axis.

The fluidic ultraviolet light treatment device 1 has a first end 10 , a second end 20 and an intermediate portion 50 located between the first end 10 and the second end 20 . Furthermore, the fluidic ultraviolet light treatment device 1 has a first light source 71 and a second light source 72 . In the example shown in FIGS. 1 and 2, the first light source 71 is arranged at the first end 10 and the second light source 72 is arranged at the second end 20 .

The material of the first end portion 10, the second end portion 20 and the intermediate portion 50 is metal, for example stainless steel. The first end portion 10, the second end portion 20, and the intermediate portion 50 may be separate from each other or integrally formed.

In FIG. 2, the flow of fluid is represented by thick arrows. A fluid, such as a liquid or gas, flows into the first end 10 from outside the fluidic ultraviolet light treatment device 1 . Furthermore, the fluid flows from the first end 10 to the second end 20 through the intermediate portion 50 and out of the fluid ultraviolet light treatment device 1 from the second end 20 .

The first end portion 10 has a fluid inflow portion 11 , an upstream channel portion 12 , a first light source placement portion 13 , and a first window portion 14 .

The inflow portion 11 includes a hole leading from the outside of the fluidic ultraviolet light treatment device 1 to the inside of the first end portion 10 . An external pipe is connected to the inflow portion 11 , and fluid flows into the inflow portion 11 from the pipe. The cross-sectional shape of the inflow portion 11 perpendicular to the fluid flow direction is, for example, circular. The inflow part 11 has an inflow port 11a formed as, for example, a circular opening. A central axis C1 passing through the center of the circular cross-sectional shape of the inflow portion 11 is parallel to the X-axis direction.

The upstream channel portion 12 is connected to the inflow portion 11 inside the first end portion 10 . The upstream channel portion 12 is branched from the inflow portion 11 into a plurality of parts. In the example shown in FIG. 2 , the upstream channel portion 12 is branched into two from the inflow portion 11 . For example, the upstream channel portion 12 branches off from the inflow portion 11 in opposite directions in the Z-axis direction perpendicular to the central axis C1.

The first light source arrangement portion 13 is formed as a space in which the first light source 71 can be arranged inside the first end portion 10 . As shown in FIG. 1, one side surface 10a of the first end portion 10 is formed with a first opening 13a communicating with the first light source arrangement portion 13. As shown in FIG. The first light source 71 can be attached to and detached from the first light source arrangement portion 13 through the first opening 13a. The first light source arrangement portion 13 is formed as a space separated from each channel portion of the fluidic ultraviolet light processing device 1, and the first light source 71 is not exposed to the fluid and is protected from the fluid. For example, when the fluid is liquid, the first light source 71 does not need a waterproof structure. In addition, the first light source 71 can be attached and detached for replacement and maintenance while the fluid is flowing through the fluid ultraviolet light processing apparatus 1 . Note that the first light source arrangement portion 13 may be arranged inside the intermediate portion 50 . In this case, a first opening 13a communicating with the first light source arrangement portion 13 is formed in a third wall portion 53 or a fourth wall portion 54 of the intermediate portion 50, which will be described later.

The first light source 71 emits ultraviolet light. The peak wavelength of the ultraviolet light emitted by the first light source 71 is, for example, 10 nm or more and 400 nm or less. The first light source 71 includes a light emitting element. For example, an LED (Light Emitting Diode) or an LD (Laser Diode) can be used as the light emitting element. As the first light source 71, a light emitting device having a light emitting element mounted on a wiring substrate or the like, a light emitting device having a housing including a light emitting element mounted on the wiring substrate or the like, or the like can be used. The first light source 71 has a first surface 71a and a second surface 71b located on the opposite side of the first surface 71a. The first surface 71a is a light emitting surface, and ultraviolet light is emitted from the first surface 71a.

A first window portion 14 is arranged to face the first surface 71 a of the first light source 71 . In the X-axis direction, the first surface 71 a is positioned between the first window portion 14 and the second surface 71 b of the first light source 71 , and the upstream channel portion 12 is positioned between the second surface 71 b and the inflow portion 11 . part of the The first window portion 14 is made of a material that is translucent to the wavelength of the light emitted by the first light source 71 . The material of the first window portion 14 is an inorganic material made of at least one selected from the group consisting of quartz glass, borosilicate glass, calcium fluoride glass, aluminoborosilicate glass, oxynitride glass, chalcogenide glass, and sapphire. can be exemplified.

The fluid flowing through the upstream channel portion 12 of the first end portion 10 can cool the first light source 71 from the second surface 71b side. As a result, it is possible to suppress a decrease in luminous efficiency due to heat generated by light emission of the first light source 71 .

3 is an exploded perspective view of the second end 20. FIG.

The second end 20 has an inner member 21 and an outer member 22 . The inner member 21 is positioned between the intermediate portion 50 and the outer member 22 in the X-axis direction. The inner member 21 and the outer member 22 may be constructed separately or integrally with each other.

The outer member 22 has an outflow portion 15 . The outflow portion 15 includes a hole leading from the inside of the second end portion 20 to the outside of the fluidic ultraviolet light treatment device 1 . An external pipe is connected to the outflow part 15 . The fluid that has flowed inside the fluid ultraviolet light processing apparatus 1 flows out from the outflow part 15 to the pipe. The cross-sectional shape of the outflow portion 15 in the direction orthogonal to the direction of fluid flow is, for example, circular. The outflow part 15 has an outflow port 15a formed, for example, as a circular opening.

A central axis C<b>2 passing through the center of the circular cross-sectional shape of the outflow portion 15 coincides with the central axis C<b>1 of the inflow portion 11 . As a result, the fluid ultraviolet light processing apparatus 1 can be easily connected in the middle of an existing straight pipe.

The inner member 21 has a second light source placement portion 16 . The second light source arrangement portion 16 is formed as a space in which the second light source 72 can be arranged inside the inner member 21 . A plurality of second light sources 72 are arranged inside the inner member 21 . In this embodiment, for example, two second light sources 72 are arranged inside the inner member 21 . Therefore, two second light source arrangement portions 16 are formed inside the inner member 21 . Two second light source arrangement portions 16 are positioned so as to sandwich the outflow portion 15 in the Z-axis direction.

As shown in FIG. 1, one side surface 21a of the inner member 21 is formed with second openings 16a communicating with the second light source arrangement portions 16, respectively. The second light source 72 can be attached to and detached from the second light source arrangement portion 16 through the second opening 16a. The second light source placement part 16 is formed as a space separated from each channel part of the fluidic ultraviolet light treatment device 1, and the second light source 72 is not exposed to the fluid and is protected from the fluid. For example, when the fluid is liquid, the second light source 72 does not need a waterproof structure. In addition, the second light source 72 can be attached and detached for replacement and maintenance while the fluid is flowing through the fluid ultraviolet light processing apparatus 1 . Note that the second light source arrangement portion 16 may be arranged inside the intermediate portion 50 . In this case, a second opening 16a communicating with the second light source arrangement portion 16 is formed in a third wall portion 53 or a fourth wall portion 54 of the intermediate portion 50, which will be described later.

The second light source 72 emits ultraviolet light. The same light source as the first light source 71 can be used as the second light source 72 . The second light source 72 may have an emission peak wavelength different from that of the first light source 71 . The second light source 72 has a first surface 72a and a second surface 72b located on the opposite side of the first surface 72a. The first surface 72a is a light emitting surface, and ultraviolet light is emitted from the first surface 72a.

A second window portion 17 is arranged in the inner member 21 so as to face the first surface 72 a of each of the second light sources 72 . The second window portion 17 is made of a material that is translucent to the wavelength of the light emitted by the second light source 72 . The second window portion 17 is made of glass, for example. The first surface 72a is located between the second window portion 17 and the second surface 72b of the second light source 72 in the X-axis direction.

As shown in FIG. 1, the second light source 72 has, for example, a wiring board 72d, a plurality of light emitting elements 72e mounted on the wiring board 72d, and a housing 72f that covers the wiring board 72d and the light emitting elements 72e. . The housing 72f is formed with a connector insertion opening 72c electrically connected to the wiring board 72d. The first light source 71 can also be configured similarly to the second light source 72 . The first light source 71 and the second light source 72 may have a waterproof structure. In this case, the translucent members constituting the first window portion 14 and the second window portion 17 are omitted, and the light from the first light source arrangement portion 13 and the second light source arrangement portion 16 into the flow passage portions 80a, 80b, and 90 is provided. The ultraviolet light from the first light source 71 and the second light source 72 may be directly irradiated.

In the example shown in FIG. 1, the intermediate portion 50 includes four walls (a first wall portion 51, a second wall portion 52, a third wall portion 53, and a fourth wall portion 54) forming a housing of the intermediate portion 50. ). The first wall portion 51 and the second wall portion 52 are separated from each other in the Z-axis direction. The third wall portion 53 and the fourth wall portion 54 are separated from each other in the Y-axis direction.

Further, the intermediate portion 50 has a plurality of partition members 61 to 64 arranged in a space surrounded by the first wall portion 51, the second wall portion 52, the third wall portion 53, and the fourth wall portion 54. . For example, four partitioning members (first partitioning member 61 , second partitioning member 62 , third partitioning member 63 , and fourth partitioning member 64 ) are arranged in intermediate portion 50 .

The first partitioning member 61, the second partitioning member 62, the third partitioning member 63, and the fourth partitioning member 64 are rectangular plate members extending in the X-axis direction. The first wall portion 51, the first partition member 61, the second partition member 62, the third partition member 63, the fourth partition member 64, and the second wall portion 52 are separated from each other in the Z-axis direction.

In the Z-axis direction, the first partition member 61 is positioned between the first wall portion 51 and the second partition member 62, and the second partition member 62 is positioned between the first partition member 61 and the third partition member 63. The third partition member 63 is positioned between the second partition member 62 and the fourth partition member 64, and the fourth partition member 64 is positioned between the third partition member 63 and the second wall portion 52. .

The first partitioning member 61, the second partitioning member 62, the third partitioning member 63, and the fourth partitioning member 64 are sandwiched between the third wall portion 53 and the fourth wall portion 54 in the Y-axis direction. . Both ends of the first partitioning member 61 , the second partitioning member 62 , the third partitioning member 63 , and the fourth partitioning member 64 in the Y-axis direction are supported by the third wall portion 53 and the fourth wall portion 54 .

One end of the first partition member 61 connects to the first end portion 10 , and the first partition member 61 extends from the connection portion with the first end portion 10 toward the second end portion 20 . The other end of the first partitioning member 61 is separated from the second end 20 .

One end of the second partition member 62 connects to the second end 20 , and the second partition member 62 extends from the connection with the second end 20 toward the first end 10 . The other end of the second partition member 62 is separated from the first end 10 .

One end of the third partition member 63 connects to the second end portion 20 , and the third partition member 63 extends from the connection portion with the second end portion 20 toward the first end portion 10 . The other end of the third partition member 63 is separated from the first end 10 .

One end of the fourth partition member 64 connects to the first end portion 10 , and the fourth partition member 64 extends from the connection portion with the first end portion 10 toward the second end portion 20 . The other end of the fourth partition member 64 is separated from the second end 20 .

The intermediate portion 50 is located between the inflow portion 11 and the outflow portion 15 . The intermediate portion 50 has branch flow passage portions 80a and 80b and a confluence flow passage portion 90 defined by the wall portions 51-54 and the partition members 61-64. For example, two branch channel portions 80a and 80b are located across the confluence channel portion 90 in the Z-axis direction. The plurality of branch channel portions 80 a and 80 b are connected to the inflow portion 11 through the upstream channel portion 12 . The confluence channel portion 90 is connected to the downstream side of the plurality of branch channel portions 80a and 80b.

At least one of the branch channel portions 80a, 80b has first channel portions 81a, 81b and second channel portions 82a, 82b. In the present embodiment, each of the two branch channel portions 80a, 80b has first channel portions 81a, 81b and second channel portions 82a, 82b.

One branch channel portion 80a has a first channel portion 81a and a second channel portion 82a. The first channel portion 81a is arranged upstream of the second channel portion 82a, and the second channel portion 82a is arranged downstream of the first channel portion 81a. The upstream side represents the side relatively close to the inflow portion 11 in the flow path from the inflow portion 11 to the outflow portion 15 , and the downstream side represents the side relatively close to the outflow portion 15 .

The other branch channel portion 80b has a first channel portion 81b and a second channel portion 82b. The first channel portion 81b is arranged upstream of the second channel portion 82b, and the second channel portion 82b is arranged downstream of the first channel portion 81b.

A first flow path portion 81 a of one branch flow path portion 80 a is defined by the first wall portion 51 , the first partitioning member 61 , the third wall portion 53 and the fourth wall portion 54 . A second flow path portion 82 a of one branch flow path portion 80 a is defined by the first partitioning member 61 , the second partitioning member 62 , the third wall portion 53 and the fourth wall portion 54 .

A first flow path portion 81 b of the other branch flow path portion 80 b is defined by the second wall portion 52 , the fourth partition member 64 , the third wall portion 53 and the fourth wall portion 54 . The second flow path portion 82b of the other branch flow path portion 80b is defined by the third partition member 63, the fourth partition member 64, the third wall portion 53, and the fourth wall portion .

One end of each of the first channel portions 81 a and 81 b is connected to the upstream channel portion 12 formed inside the first end portion 10 . The first flow path portions 81a and 81b extend from the connecting portion with the upstream flow path portion 12 in the first direction d1. The first direction d1 is, for example, a direction parallel to the X-axis direction. The fluid flows in the first direction d1 through the respective first channel portions 81a and 81b. Also, the first direction d1 may be a direction inclined with respect to the X-axis direction.

The first channel portion 81a of one branch channel portion 80a is connected to the second channel portion 82a through the space between the first partitioning member 61 and the second end portion 20, and the other branch channel portion 80b is connected to the second channel portion 82a. The first channel portion 81b communicates with the second channel portion 82b through the space between the fourth partition member 64 and the second end portion 20 .

Each of the second flow passage portions 82a and 82b extends in a direction different from the first direction d1 from a portion communicating with the first flow passage portions 81a and 81b, and the fluid flows through the second flow passage portions 82a and 82b. It flows in the second direction d2. In this embodiment, the second direction d2 is opposite to the first direction d1.

The first channel portions 81a and 81b, the second channel portions 82a and 82b, and the confluence channel portion 90 are arranged adjacent to each other in the Z-axis direction. The first channel portion 81a of one branch channel portion 80a is adjacent to the second channel portion 82a of one branch channel portion 80a with the first partitioning member 61 interposed therebetween. The first channel portion 81b of the other branched channel portion 80b is adjacent to the second channel portion 82b of the other branched channel portion 80b with the fourth partitioning member 64 interposed therebetween. The confluence channel portion 90 is adjacent to the second channel portion 82a of one branch channel portion 80a via the second partition member 62, and is adjacent to the second channel portion 82a of the other branch channel portion 80b via the third partition member 63. It is adjacent to the second channel portion 82b. In the Z-axis direction, two second flow path portions 82a and 82b are positioned between the two first flow path portions 81a and 81b, and a confluence flow path portion 90 is positioned between the two second flow path portions 82a and 82b. is located.

The second flow path portion 82a of one branch flow path portion 80a is connected to the confluence flow path portion 90 through the space between the second partitioning member 62 and the first end portion 10. As shown in FIG. The second flow path portion 82b of the other branch flow path portion 80b is connected to the confluence flow path portion 90 through the space between the third partitioning member 63 and the first end portion 10. As shown in FIG. The confluence channel portion 90 extends in the X-axis direction from a portion connecting to the two second channel portions 82 a and 82 b and is connected to the outflow portion 15 . The fluids that have flowed through the respective second flow path portions 82a and 82b merge in the confluence flow path portion 90 and flow through the confluence flow path portion 90 in the first direction d1.

A main channel portion 100 is arranged between the inflow portion 11 and the outflow portion 15 . The fluid that has flowed into the inflow portion 11 from the outside of the fluidic ultraviolet light treatment device 1 flows through the main channel portion 100 and flows out of the fluidic ultraviolet light treatment device 1 from the outflow portion 15 . The main flow passage portion 100 includes an upstream flow passage portion 12 arranged at the first end portion 10, branch flow passage portions 80a and 80b arranged at the intermediate portion 50, and a confluence flow passage portion arranged at the intermediate portion 50. 90 , a first main channel portion 110 located at the second end 20 , and a second main channel portion 120 located at the second end 20 .

The first main channel portion 110 is arranged upstream of the second main channel portion 120 and is connected to the confluence channel portion 90 of the main channel portion 100 . As shown in FIG. 2, the two second light sources 72 are positioned across the first main flow path portion 110 in the Z-axis direction. The second main channel portion 120 is arranged downstream of the first main channel portion 110 and is connected to the outflow portion 15 . The first main channel portion 110 and the second main channel portion 120 are connected to each other and penetrate the inner member 21 in the direction of fluid flow (the X-axis direction in FIG. 2).

The cross-sectional area of the second main flow path section 120 perpendicular to the fluid flow direction (the X-axis direction in FIG. 2) is smaller than the cross-sectional area of the first main flow path section 110 perpendicular to the X-axis direction. In addition, the cross-sectional area of the second main flow path portion 120 perpendicular to the X-axis direction is smaller than the cross-sectional area of the outflow portion 15 perpendicular to the X-axis direction.

The second end portion 20 has a secondary channel portion 200 connected to the main channel portion 100 . A sub-flow path portion 200 is connected to a part of the main flow-path portion 100 through a first connection portion 230 and a second connection portion 240 . For example, the first connecting portion 230 is arranged in the first main channel portion 110 and connects the first main channel portion 110 and the sub-channel portion 200 . The second connecting portion 240 is arranged in the second main channel portion 120 and connects the second main channel portion 120 and the sub-channel portion 200 .

The area of the cross section perpendicular to the fluid flow direction (the direction from the first connecting portion 230 to the second connecting portion 240) of the sub flow channel portion 200 is , 90, 110, and 120 perpendicular to the direction of fluid flow.

The second connection portion 240 is arranged downstream of the first connection portion 230 in the X-axis direction. The first connection portion 230 and the second connection portion 240 are arranged downstream of the second light source 72 in the X-axis direction.

The inner member 21 has a first surface 21b (shown in FIG. 3) facing the outer member 22 and a second surface 21d (shown in FIG. 1) located opposite the first surface 21b. A sub-partition member 251 is arranged on the first surface 21 b of the inner member 21 . For example, two sub-partitioning members 251 are located across the second main flow path portion 120 in the Y-axis direction. Each sub-partition member 251 extends in the Z-axis direction. A wall portion 21c surrounding the first surface 21b is arranged on the outer edge of the first surface 21b.

The outer member 22 has a first surface 22b (shown in FIG. 3) facing the inner member 21 and a second surface 22d (shown in FIG. 2) opposite the first surface 22b. The inner member 21 is overlapped with the outer member 22 with the first surface 21b on which the sub-partition member 251 and the wall portion 21c are arranged facing the first surface 22b of the outer member 22 . A second connecting portion 240 is opened in the first surface 22 b of the outer member 22 . The second connection portion 240 is connected to the outflow portion 15 in the X-axis direction. The width of the second connection portion 240 in the Z-axis direction is smaller than the diameter of the outflow portion 15 . The width of the second connection portion 240 in the Y-axis direction is larger than the diameter of the outflow portion 15 .

The sub-channel portion 200 is defined by the first surface 21 b of the inner member 21 , the sub-dividing member 251 , the wall portion 21 c, and the first surface 22 b of the outer member 22 . The sub-channel portion 200 has a first sub-channel portion 210 and a second sub-channel portion 220 . In the direction in which the fluid flows through the sub-channel portion 200, the first sub-channel portion 210 is connected to the first connection portion 230 side upstream of the second sub-channel portion 220, and the second sub-channel portion 220 is connected to It is connected to the second connecting portion 240 on the downstream side of the first sub-channel portion 210 .

The fluid flowing from the confluence channel portion 90 to the outflow portion 15 is divided into a main stream and a side stream. The main stream flows from the confluence channel portion 90 through the first main channel portion 110 and the second main channel portion 120 without passing through the sub-channel portion 200 . The secondary flow flows from the confluence flow path section 90 into the secondary flow path section 200 through the first connection section 230 . The sub-flow that has flowed into the sub-channel portion 200 flows through the first sub-channel portion 210 and the second sub-channel portion 220 in order, and flows out to the outflow portion 15 through the second connecting portion 240 .

The first sub-flow path portion 210 is arranged in the Z-axis direction orthogonal to the direction in which the main flow of the main flow path portion 100 (the X-axis direction in FIGS. 2 and 3 ) flows. 2 It extends in a direction away from the main channel portion 120 . The two first sub-flow passages 210 are positioned to sandwich the second main flow-path 120 in the Z-axis direction, and the respective first sub-flow passages 210 extend from the second main flow-path 120 in directions opposite to each other. ing. Each first sub-flow path portion 210 extends in the Z-axis direction in a direction away from the second main flow-path portion 120 of the main flow-path portion 100 .

The two second sub-flow paths 220 are located across the first sub-flow path 210 in the Y-axis direction. The sub-partitioning member 251 is positioned between the first sub-channel portion 210 and the second sub-channel portion 220 in the Y-axis direction. The first sub-channel portion 210 and the second sub-channel portion 220 are adjacent to the sub-partitioning member 251 in the Y-axis direction.

The second sub-channel portion 220 extends in a direction different from the extending direction of the first sub-channel portion 210 . For example, the second sub flow path portion 220 extends in the Z-axis direction in a direction approaching the second main flow path portion 120 and the second connecting portion 240 .

As shown in FIG. 2, the first light source 71 is arranged at a position capable of irradiating the confluence channel portion 90 with ultraviolet light. For example, the first light source 71 is arranged in the first light source arrangement portion 13 formed in the first end portion 10, and the first surface (light exit surface) 71a of the first light source 71 is through the first window portion 14, It faces the confluence portion with the two second flow passage portions 82 a and 82 b in the confluence flow passage portion 90 . The ultraviolet light emitted from the first surface 71a of the first light source 71 is irradiated to the confluence channel portion 90 from the confluence side with the second flow channel portions 82a and 82b.

One or more second light sources 72 are arranged at positions capable of irradiating ultraviolet light with respect to one branch channel portion. In the example shown in FIG. 2, each of the second light sources 72 is arranged at a position capable of irradiating ultraviolet light onto each of the branch flow passage portions 80a and 80b. For example, the second light source 72 is arranged in the second light source arrangement portion 16 formed at the second end portion 20 . At least one of the two second light sources 72 is arranged at a position capable of irradiating ultraviolet light onto the first channel portions 81a and 81b and the second channel portions 82a and 82b. In the present embodiment, one second light source 72 faces the portion where the first channel portion 81a and the second channel portion 82a of one branch channel portion 80a are connected through the second window portion 17. placed in position. The other second light source 72 is arranged at a position facing the portion where the first channel portion 81b and the second channel portion 82b of the other branch channel portion 80b are connected through the second window portion 17. .

The ultraviolet light emitted from the first surface 72a of one of the second light sources 72 passes through the first channel portion 81a and the second channel portion 81a from the connection portion side of the first channel portion 81a and the second channel portion 82a. The portion 82a is irradiated. The ultraviolet light emitted from the first surface 72a of the other second light source 72 passes through the first channel portion 81b and the second channel portion 81b from the connecting portion side of the first channel portion 81b and the second channel portion 82b. The portion 82b is irradiated. The second surface 72b of the second light source 72 is positioned between the first surface 72a and the sub-channel portion 200 in the X-axis direction.

Next, fluid treatment using the fluid ultraviolet light treatment apparatus 1 of this embodiment will be described.

The fluid ultraviolet light treatment apparatus 1 treats fluid such as liquid and gas by irradiating the fluid with ultraviolet light. For example, by irradiating water with ultraviolet light, the number of bacteria and viruses in the treated water can be reduced compared to before the treatment.

The inflow part 11 is connected to a pipe on the upstream side of the fluidic ultraviolet light treatment device 1 directly or via a joint member. The outflow part 15 is connected to a pipe downstream of the fluid ultraviolet light processing apparatus 1 directly or via a joint member. The fluid that has flowed through the external upstream pipe flows into the inflow portion 11 and branches into two at the upstream flow path portion 12 . A part of the fluid branched into two flows into the first flow channel portion 81a of one branch flow channel portion 80a, and the other part of the branched fluid flows into the first flow channel portion of the other branch flow channel portion 80b. 81b.

The fluid that has flowed into the first flow path portions 81a and 81b flows through the first flow path portions 81a and 81b in the first direction d1, and flows through the first flow path portions 81a and 81b at the ends of the first flow path portions 81a and 81b on the second end portion 20 side. It flows into the second channel portions 82a and 82b. The fluid that has flowed into the second flow path portions 82a and 82b flows through the second flow path portions 82a and 82b in the second direction d2. The fluid flowing through the first channel portions 81 a and 81 b and the second channel portions 82 a and 82 b is irradiated with ultraviolet light from the second light source 72 .

The fluids that have flowed in the second direction d2 through the respective second flow path portions 82a and 82b merge and flow into the confluence flow path portion 90. As shown in FIG. The fluid that has flowed into the confluence channel portion 90 flows through the confluence channel portion 90 in the first direction d1. The fluid flowing through the confluence channel portion 90 is irradiated with ultraviolet light from the first light source 71 . The fluid that has flowed through the confluence channel portion 90 flows out to an external downstream pipe connected to the outflow portion 15 via the outflow portion 15 .

According to this embodiment, the fluid that has flowed into the fluid ultraviolet light treatment device 1 from the inflow part 11 is divided into a plurality of parts, merged again, and flowed out from the outflow part 15 . As a result, the flow channel length between the external upstream pipe connected to the inflow portion 11 and the external downstream pipe connected to the outflow portion 15 can be adjusted to the inflow portion without branching. 11 to the outflow part 15, it can be made longer. Then, the fluid flowing through each of the branched flow path portions 80a and 80b is irradiated with ultraviolet light from the second light source 72, and then merges with the merged flow path portion 90 from the branched flow path portions 80a and 80b. The flowing fluid is irradiated with ultraviolet light from the first light source 71 . As a result, the integrated illuminance of the fluid flowing through the fluid ultraviolet light processing apparatus 1 by the ultraviolet light can be increased, and the effect of processing the fluid by the ultraviolet light can be enhanced.

The fluid that has flowed through the confluence channel portion 90 flows into the first main channel portion 110 . Part of the fluid flowing through the first main flow path portion 110 flows into the first sub-flow path portion 210 from the first connection portion 230, and leaves the first sub-flow path portion 210 from the first connection portion 230 in the Z-axis direction. flow in the direction Through the space between both ends of the sub-partitioning member 251 in the Z-axis direction and the wall portion 21c, the fluid that has flowed through the first sub-flow path portion 210 flows into the second sub-flow path portion 220 and changes its flow in the Z-axis direction. invert. The fluid whose flow is reversed flows from the connecting portion with the first sub-flow path portion 210 through the second sub-flow-path portion 220 in the Z-axis direction in a direction approaching the second connecting portion 240, and flows from the second connecting portion 240. It flows out to the outflow part 15 .

The second light source 72 can be cooled from the second surface 72b side by the fluid flowing through the sub-flow path portion 200 . As a result, it is possible to suppress a decrease in luminous efficiency due to heat generated by the light emission of the second light source 72 .

The area of the cross section perpendicular to the direction in which the fluid flows in the secondary flow path portion 200 is in the direction in which the main flows of the first main flow path portion 110 and the second main flow path portion 120 between the confluence flow path portion 90 and the outflow portion 15 flow. smaller than the area of the orthogonal cross section. Therefore, the flow rate of the main stream flowing between the confluence channel portion 90 and the outflow portion 15 is greater than the flow rate of the secondary flow flowing through the secondary channel portion 200 . Furthermore, the second light source 72 is not located in the flow channel portion between the confluence flow channel portion 90 and the outflow portion 15 and does not block the fluid flow in the main flow channel portion 100 . As a result, according to the present embodiment, the flow of the fluid from the confluence channel portion 90 to the outflow portion 15 is not hindered, that is, while suppressing the pressure loss of the fluid in the fluid ultraviolet light treatment device 1, The fluid can cool the second light source 72 .

In addition, by causing the fluid to flow in different directions through the two sub-channels (the first sub-channel 210 and the second sub-channel 220), the size of the fluidic ultraviolet light treatment device 1 is suppressed, The flow path length of the fluid flowing through the secondary flow path section 200 can be lengthened, and the cooling efficiency of the second light source 72 can be enhanced. For example, by causing the fluid to flow in opposite directions in the Z-axis direction to the first sub-channel portion 210 and the second sub-channel portion 220, the size of the member in which the sub-channel portion 200 is arranged increases in the Y-axis direction. can be suppressed.

FIG. 4 is a perspective view showing another example of the sub-partitioning member 250. As shown in FIG.

The sub-partition member 250 has two first partitions 252 extending in the Z-axis direction and two second partitions 253 extending in the Y-axis direction.

The two first partitions 252 are positioned between the first sub-channel 210 and the second sub-channel 220 in the Y-axis direction. The first sub-channel portion 210 and the second sub-channel portion 220 are adjacent to the first partition portion 252 in the Y-axis direction.

The two second partitions 253 are positioned apart in the Z-axis direction. The second main flow path portion 120 is located between the two second partition portions 253 in the Z-axis direction. Each second partition 253 is connected to two first partitions 252 in the Y-axis direction. Each second partition portion 253 partitions the first connection portion 230 and the second main flow path portion 120 in the Z-axis direction. The first connection portion 230 is positioned between the second partition portion 253 and the first sub-flow path portion 210 in the Z-axis direction. Since the space between the first connection portion 230 and the second main flow path portion 120 is partitioned by the second partition portion 253 , from the first main flow passage portion 110 to the first sub flow passage portion 210 through the first connection portion 230 It is possible to make it easier to flow a side stream.

As schematically shown in FIG. 5A, the second light source 72 may be configured to irradiate the main flow path portion 100 with ultraviolet light from the Z-axis direction orthogonal to the fluid flow direction (X-axis direction). The second light source 72 is located between the main channel portion 100 and the sub channel portion 200 in the Z-axis direction. A first surface (light emitting surface) 72a of the second light source 72 is opposed to the main channel portion 100, and a second surface 72b is opposed to the secondary channel portion.

The first connection portion 230 is arranged upstream of the second connection portion 240 in the X-axis direction. The first connecting portion 230 is arranged upstream of the second light source 72 in the X-axis direction. The second connecting portion 240 is arranged downstream of the second light source 72 in the X-axis direction.

As shown in FIG. 5B, the first connection portion 230 and the second connection portion 240 may be arranged upstream of the second light source 72 in the X-axis direction. The first connection portion 230 is arranged upstream of the second connection portion 240 in the X-axis direction.

As shown in FIG. 5C, the first connection portion 230 and the second connection portion 240 may be arranged downstream of the second light source 72 in the X-axis direction. The first connection portion 230 is arranged upstream of the second connection portion 240 in the X-axis direction.

Alternatively, the first connecting portion 230 may be arranged downstream of the second connecting portion 240 in the X-axis direction, and the second connecting portion 240 may be arranged upstream of the first connecting portion 230 in the X-axis direction. . In this case, at least one of the first connection portion 230, the second connection portion 240, and the sub-channel portion 200 has a mechanism for preventing backflow of fluid from the second connection portion 240 to the first connection portion 230, for example, A non-return valve is preferably arranged.

A light source 170 shown in FIG. 6A can also be used as the first light source and the second light source.

The light source 170 has a wiring board 171 and a plurality of light emitting elements. A light emitting element is placed on the surface of the wiring substrate 171 . The wiring board 171 is, for example, a quadrangle in plan view from the front side of the wiring board 171, and the center of the wiring board 171 is located at the intersection of two diagonal lines of the quadrangle. The wiring board 171 has a first region 181 and a second region 182 . The first region 181 and the second region 182 are arranged so as to line up in one direction of the wiring substrate 171 . The wiring board 171 can further have a third region 183 . Third region 183 is located between first region 181 and second region 182 in a plane parallel to the surface of wiring board 171 . The third area 183 includes the center of the wiring board 171 . When the third region 183 is not arranged, the center of the wiring board 171 is located at the boundary between the first region 181 and the second region 182, for example. First region 181 or second region 182 may include the center of wiring board 171 . The width of the third region 183 in the direction in which the first region 181, the third region 183, and the second region 182 are arranged is preferably equal to or wider than the thickness of the first partition member 61 and the fourth partition member 64. .

In the example shown in FIG. 6A , a plurality of housings 172 are placed on the first area 181 . A plurality of housings 172 are mounted on the second area 182 . One housing 172 contains at least one light emitting element. Housing 172 can also include a lens that is positioned over the light emitting element. Alternatively, light emitting elements that are not housed in the housing 172 may be arranged in the first region 181 and the second region 182 . No light emitting element is arranged in the third region 183 .

The light source 170 can have a holding member 173 that holds the wiring board 171 . The holding member 173 has a surface 173e on which the wiring board 171 is placed and a surface opposite to the surface 173e. The wiring board 171 is fixed to the surface 173e of the wiring board 171 by, for example, screws or an adhesive. The surface of the wiring board 171 on which the housing 172 including the light emitting element is mounted is the first surface 170a of the light source 170, and the surface of the holding member 173 opposite to the surface 173e is the second surface 170b of the light source 170. be. The holding member 173 has a wall portion 173b covering the end portion of the wiring board 171 on the side of the first surface 170a of the light source 170 . For example, a pair of wall portions 173b are positioned so as to sandwich the wiring board 171 in plan view of the first surface 170a.

The light source 170 can arrange the wiring 174 electrically connected to the light emitting element on the surface of the wiring substrate 171 . Also, a connector 175 electrically connected to the wiring 174 can be arranged on the surface of the wiring board 171 . One wall portion 173 b of the holding member 173 is provided with an insertion opening 173 a through which the connector 175 is exposed from the holding member 173 .

A spring member 176 is arranged on the first surface 170 a side of the light source 170 . The spring member 176 is, for example, a metal leaf spring. For example, a pair of spring members 176 are positioned so as to sandwich the wiring board 171 in plan view of the first surface 170 a and are fixed to the holding member 173 .

The light source 170 can be arranged in the first light source arrangement portion 13 shown in FIG. 2 as the first light source. A first surface 170 a of the light source 170 arranged in the first light source arrangement portion 13 faces the first window portion 14 . The ultraviolet light emitted from the first surface 170 a irradiates the fluid flowing through the confluence channel portion 90 through the first window portion 14 .

The light source 170 is arranged in the first light source arrangement portion 13 with the spring member 176 elastically deformed from its natural state. The spring member 176 arranged on the side of the first surface 170 a contacts the first window portion 14 . Due to the restoring force of the spring member 176, the light source 170 is biased toward the first partition wall 13b separating the upstream channel portion 12 and the first light source placement portion 13, and the second surface 170b is pressed against the first partition wall 13b. be done. As a result, the cooling efficiency of the light source 170 by the fluid flowing through the upstream channel portion 12 can be increased.

Also, the light source 170 can be arranged in the second light source arrangement section 16 shown in FIG. 2 as a second light source. A first surface 170 a of the light source 170 arranged in the second light source arrangement portion 16 faces the second window portion 17 . The ultraviolet light emitted from the first surface 170a is applied through the second window 17 to the fluid flowing through the branch flow paths 80a and 80b.

The light source 170 is arranged in the second light source arrangement portion 16 with the spring member 176 elastically deformed from its natural state. A spring member 176 provided on the side of the first surface 170 a contacts the second window portion 17 . Due to the restoring force of the spring member 176, the light source 170 is biased toward the second partition wall 16b that separates the sub-channel portion 200 and the second light source arrangement portion 16, and the second surface 170b is pressed against the second partition wall 16b. . As a result, the cooling efficiency of the light source 170 by the fluid flowing through the sub-flow path portion 200 can be increased.

A first region 181 of the light source 170 arranged in the second light source arrangement portion 16 facing the branch flow channel portion 80a of the pair of branch flow channel portions 80a and 80b faces the first flow channel portion 81a, The light-emitting elements arranged in one region 181 irradiate the fluid flowing through the first channel portion 81a with ultraviolet light. The second region 182 of the light source 170 arranged in the second light source arrangement portion 16 facing the one branched flow channel portion 80a faces the second flow channel portion 82a, and the light emitting element arranged in the second region 182 faces the second flow channel portion 82a. Ultraviolet light is applied to the fluid flowing through the second channel portion 82a.

The first region 181 of the light source 170 arranged in the second light source arrangement portion 16 facing the other branch flow channel portion 80b faces the second flow channel portion 82b, and the light emitting element arranged in the first region 181 faces the second flow channel portion 82b. The fluid flowing through the second channel portion 82b is irradiated with ultraviolet light. The second region 182 of the light source 170 arranged in the second light source arrangement portion 16 facing the other branch flow channel portion 80b faces the first flow channel portion 81b, and the light emitting element arranged in the second region 182 faces the second light source placement portion 80b. Ultraviolet light is applied to the fluid flowing through the first channel portion 81b. Since the ultraviolet light from the light emitting element can be irradiated in the extending direction of each of the first channel portions 81a and 81b and the second channel portions 82a and 82b, the integrated illuminance can be increased. The same light emitting element can be used for the light emitting element arranged in the first region 181 and the light emitting element arranged in the second region 182 . The light emitting elements arranged in the first region 181 and the light emitting elements arranged in the second region 182 may have different emission peak wavelengths.

In the third region 183 of the light source 170 arranged in the second light source arrangement portion 16 facing one of the branch channel portions 80a, the first channel portion 81a and the second channel portion 82a of the branch channel portion 80a communicate with each other. It opposes the first partition member 61 through the portion that faces the first partition member 61 . No light emitting element is arranged in the third region 183 facing the first partition member 61 . In the third region 183 of the light source 170 arranged in the second light source arrangement portion 16 facing the other branch flow channel portion 80b, the first flow channel portion 81b and the second flow channel portion 82b of the branch flow channel portion 80b communicate with each other. It opposes the fourth partition member 64 via the portion that is aligned. No light emitting element is arranged in the third region 183 facing the fourth partition member 64 . The ultraviolet light from the light emitting elements arranged in the first region 181 and the second region 182 can sufficiently obtain the integrated illuminance of the fluid flowing through the branch flow path portions 80a and 80b. By adopting a structure in which no light-emitting elements are arranged in the inner wall, the number of light-emitting elements can be reduced while ensuring the effect of treating the fluid with ultraviolet light.

A screw 177 shown in FIG. 6A can be arranged in the third region 183 where no light emitting element is arranged in the light source 170 . The screw 177 can fix the third region 183 , which is a region including the center of the wiring board 171 , to the holding member 173 . In addition, for example, the four corners of the wiring board 171 are fixed to the holding member 173 with screws. By fixing the third area 183 including the center of the wiring board 171 to the holding member 173 with a screw 177, the center of the wiring board 171 is prevented from floating from the holding member 173, and the wiring board 171 is brought into close contact with the holding member 173. be able to. This suppresses the formation of a gap between the wiring board 171 and the first partition wall 13 b , thereby increasing the cooling efficiency of the light source 170 by the fluid flowing through the upstream flow path section 12 . Also, the gap between the wiring substrate 171 and the second partition wall 16b can be suppressed, and the cooling efficiency of the light source 170 by the fluid flowing through the sub-flow path portion 200 can be increased.

Also, the light source 170 may have a light reflecting member. FIG. 6B is a perspective view showing a light source 170 having a light reflecting member 178, which is another example of a light source according to one embodiment of the present invention.

The light reflective member 178 has a shape such as a polygon or a circle in a plan view seen from the surface side of the wiring board 171 . In the example shown in FIG. 6B, the light reflective member 178 has a substantially rectangular frame-like shape in a plan view seen from the surface side of the wiring board 171 . Also, the light reflective member 178 is a member having a predetermined height from the surface of the wiring board 171 . The light reflecting member 178 is arranged so as to surround the first region 181 , the second region 182 and the third region 183 in plan view from the surface side of the wiring board 171 .

The light-reflecting member 178 includes, for example, a metal material or a resin material. As the metal material, aluminum subjected to surface treatment, stainless steel, or the like can be used, and as the resin material, fluorine resin or the like can be used.

The light reflecting member 178 reflects the light from the light emitting elements contained in the first region 181 and the second region 182 to the inside of the light reflecting member 178 by the inner surface 178a, thereby It suppresses the light emitted outside the light reflecting member 178 . Thereby, the light source 170 can improve the light extraction efficiency.

The inner surface 178a of the light reflecting member 178 is preferably a surface having a high reflectance with respect to ultraviolet light emitted from the light emitting element in order to suppress light loss due to light absorption or light scattering. Such a surface can be, for example, a surface having a reflectance of 60% or more, preferably 90% or more, with respect to ultraviolet light emitted from the light emitting element. In addition, instead of the light reflecting member 178, a light absorbing member may be arranged.

As the first light source and the second light source, the light source 270 shown in FIGS. 7 and 8 can also be used. The light source 270 has a waterproof structure in which the light source itself shields the light emitting element and the wiring board from water. In the following, description of the configuration common to the light source 170 will be omitted as appropriate.

In the light source 270 shown in FIGS. 7 and 8, the recess 273a is defined by the surface of the holding member 273 and the wall 273b. The wiring board 271 is arranged in the recess 273 a of the holding member 273 .

The opening of the recess 273a of the holding member 273 is closed with a cover glass 286 made of synthetic quartz, for example. A waterproof ring 285 is interposed between the cover glass 286 and the holding member 273 . The light source 270 can have a frame member 288 positioned over the wall 273 of the retaining member 273 . The frame member 288 can have a quadrangular ring shape in a plan view viewed from the first surface 270a side of the light source 270 . A cover glass 286 is sandwiched between the frame member 288 and the holding member 273 . The frame member 288 is fixed to the holding member 273 by screws, for example, while pressing the peripheral portion of the surface 286a of the cover glass 286 (the surface opposite to the surface facing the wiring board 271) toward the holding member 273. be. A cushioning material 287 is interposed between the peripheral portion of the surface 286 a of the cover glass 286 and the frame member 288 . Note that the frame member 288 may be fixed with an adhesive. Also, the light source 270 may have a light reflecting member 178 as shown in FIG. 4B in the concave portion 273a.

One side surface of the wall portion 273b that defines the recess 273a of the holding member 273 is provided with a cylindrical portion 273c formed with a first through hole 273d communicating with the recess 273a.

The light source 270 can be arranged in the first light source placement section 13 through the first opening 13a shown in FIG. 2 as a first light source. Also, the light source 270 can be arranged in the second light source arrangement portion 16 through the second opening 16a shown in FIG. 2 as a second light source. When the light source 270 is arranged in the first light source arrangement portion 13, the first opening 13a is closed with a waterproof cap 291 shown in FIG. A waterproof ring 292 is interposed between the waterproof cap 291 and the inner wall of the first opening 13a.

The waterproof cap 291 has a second through hole 291a. It is preferable that the shape of the opening of the second through hole 291a be substantially the same as that of the cylindrical portion 273c of the light source 270 when viewed from the opening direction of the first through hole 273d. In a state in which the light source 270 is arranged in the first light source arrangement portion 13 and the waterproof cap 291 is attached to the first opening 13a, the cylindrical portion 273c provided in the holding member 273 is fitted into the second through hole 291a. . A waterproof ring 284 is interposed between the cylindrical portion 273c and the inner wall of the second through hole 291a. This prevents the formation of a gap between the second through-hole 291a and the cylindrical portion 273c, thereby preventing water from entering the first light source arrangement portion 13. FIG. The light source 270 can have an electric cable arranged on the surface of the wiring board 171 to be electrically connected to the wiring 274 of the wiring board 271 . In this case, the electric cable can be pulled out of the light source 270 through the first through hole 273 d of the holding member 273 and the second through hole 291 a of the waterproof cap 291 .

<Effect of fluid retention in the embodiment>
In the embodiment, part of the fluid flowing inside the fluid ultraviolet light treatment apparatuses 1 and 2 stays, so that the integrated illumination intensity of the ultraviolet light with respect to the fluid increases according to the residence time, and the treatment effect of the fluid with the ultraviolet light is enhanced. can be enhanced. The action of this fluid retention will be described in detail below.

(First example of fluid retention action)
A first example of the action of fluid retention will be described with reference to FIGS. 9 and 10. FIG. 9 and 10 are diagrams for explaining a first example of fluid retention action, FIG. 9 being a cross-sectional view of the fluid ultraviolet light processing device 1 and FIG. 10 being a perspective view of the fluid ultraviolet light processing device 1 .

An end portion 91 of the confluence channel portion 90 on the outflow portion 15 side has an opening with a smaller cross-sectional area than the cross-sectional area of the confluence channel portion 90 in the direction perpendicular to the first direction d1. As shown in FIGS. 9 and 10, part of the fluid flowing through the confluence channel portion 90 from the inflow portion 11 side toward the outflow portion 15 side along the X-axis direction It stays by hitting the end 91 of 90 and rebounding. Flow 92 indicated by thick arrows in FIGS. 9 and 10 represents the flow of fluid bounced off end 91 .

For example, due to such a flow 92 , part of the fluid flowing through the confluence channel portion 90 stays in the vicinity of the end portion 91 for a longer time. Note that the flow 92 shown in FIGS. 9 and 10 is an example shown for convenience of explanation, and the direction and size of the flow are not limited to this.

Since the first light source 71 is arranged to face the end portion 91 , the fluid staying in the vicinity of the end portion 91 is efficiently irradiated with the ultraviolet light from the first light source 71 . As a result, the accumulated illuminance of the ultraviolet light emitted from the first light source 71 to the fluid staying in the vicinity of the end portion 91 increases according to the residence time. can increase

(Second example of fluid retention action)
Next, FIG. 11 is a cross-sectional view of the fluid ultraviolet light treatment device 1 for explaining a second example of the action of fluid retention.

As shown in FIG. 11, part of the fluid flowing through the branch flow path portions 80a and 80b along the X-axis direction generates eddies at the folded portions of the branch flow path portions 80a and 80b. Here, a vortex means a fluid flow that entrains.

In FIG. 11, a folded portion 93a1 indicated by a broken line is a folded portion from the first flow path portion 81a to the second flow path portion 82a in the branch flow path portion 80a. A vortex 94a1 indicated by a thick arrow represents a vortex generated in the vicinity of the folded portion 93a1 in the second flow path portion 82a. In addition, the folded portion refers to a portion where the fluid that has flowed in a predetermined direction is folded back toward the side opposite to the predetermined direction.

Similarly, the folded portion 93a2 is a folded portion from the second flow path portion 82a to the confluence flow portion 90 in the branch flow path portion 80a. A vortex 94 a 2 represents a vortex generated in the vicinity of the folded portion 93 a 2 in the confluence channel portion 90 .

The folded portion 93b1 is a folded portion from the first flow path portion 81b to the second flow path portion 82b in the branch flow path portion 80b. A vortex 94b1 represents a vortex generated in the vicinity of the folded portion 93b1 in the second flow path portion 82b.

The folded portion 93b2 is a folded portion from the second flow path portion 82b to the confluence flow path portion 90 in the branch flow path portion 80b. A vortex 94 b 2 represents a vortex generated in the vicinity of the folded portion 93 b 2 in the confluence channel portion 90 .

Since the fluid ultraviolet light processing apparatus 1 has a substantially rectangular cross section perpendicular to the fluid flow direction, eddies are likely to occur at the corners of the folded portions 93a1, 93a2, 93b1 and 93b2. Here, the corner means a portion where surfaces intersect.

Due to the generation of eddies such as the eddies 94a1, 94a2, 94b1 and 94b2, part of the fluid flowing through the branch flow path portions 80a and 80b stays in the vicinity of the folded portions 93a1, 93a2, 93b1 and 93b2 for a longer time. The eddies 94a1, 94a2, 94b1, and 94b2 shown in FIG. 11 are examples shown for convenience of explanation, and the direction and size of the eddies are not limited to these.

Since the first light source 71 is arranged in the vicinity of each of the folded portions 93a2 and 93b2, the fluid staying in the vicinity of each of the folded portions 93a2 and 93b2 is efficiently irradiated with the ultraviolet light from the first light source 71. be. In addition, since the second light source 72 is arranged in the vicinity of each of the folded portions 93a1 and 93b1, the fluid staying in the vicinity of each of the folded portions 93a1 and 93b1 is efficiently irradiated with the ultraviolet light from the second light source 72. be irradiated.

As described above, the accumulated illuminance of the ultraviolet light emitted from the first light source 71 and the second light source 72 to the fluid staying in the vicinity of each of the folded portions 93a1, 93a2, 93b1, and 93b2 increases according to the staying time. , the fluid ultraviolet light treatment device 1 can enhance the treatment effect by ultraviolet light.

In addition, for example, when the fluid is water, bacteria and viruses in the water have a higher specific gravity than water. It easily passes through the vicinity of the second light source 72 . Therefore, the fluid ultraviolet light treatment device 1 can increase the integrated illuminance of the ultraviolet light for bacteria and viruses in the water, and can enhance the treatment effect by the ultraviolet light.

In addition, in the example shown in FIG. 11, the fluid ultraviolet light processing device 1 having a plurality of branched channel portions 80a and 80b is illustrated, but the configuration is not limited to this. Even when the fluidic ultraviolet light processing device 1 has one branched channel portion, the effects described in the second example can be obtained.

(Third example of fluid retention action)
Next, FIG. 12 is a cross-sectional view of the fluid ultraviolet light processing apparatus 1 for explaining a third example of fluid retention action.

As shown in FIG. 12, if the width w1 of the confluence channel portion 90 is wider than the width w2 of each of the branch channel portions 80a and 80b in the direction perpendicular to the direction of fluid flow, vortices are likely to occur. The direction perpendicular to the direction of fluid flow is, for example, the direction along the Y-axis or the direction along the Z-axis. Therefore, the fluid ultraviolet light processing apparatus 1 may have a width w1 along the Y-axis greater than the width w2 along the Y-axis, or a width w1 along the Z-axis greater than the width w2 along the Z-axis. It can be wide.

By making the width w1 wider than the width w2, a flow rate difference or flow velocity difference is provided between the fluid flowing through the branch flow path portion 80a or 80b and the fluid flowing through the confluence flow path portion 90. FIG. According to this flow rate difference or flow velocity difference, vortices are likely to occur in the vicinity of each of the folded portions 93a2 and 93b2, and the retention time of the fluid in the vicinity of each of the folded portions 93a2 and 93b2 increases. In FIG. 12, a vortex 94a2 represents a vortex generated in the vicinity of the folded portion 93a2 in the confluence channel portion 90, and a vortex 94b2 represents a vortex generated in the vicinity of the folded portion 93b2 in the confluence channel portion 90, respectively.

The effects of fluid retention in the vicinity of each of the folded portions 93a2 and 93b2 are the same as those described in the above second example.

(Fourth example of fluid retention action)
Next, FIG. 13 is a cross-sectional view of the fluid ultraviolet light treatment device 1 for explaining a fourth example of fluid retention action.

As shown in FIG. 13, when the fluidic ultraviolet light treatment device 1 is installed such that the branch channel portion 80b is arranged vertically downward with respect to the branch channel portion 80a, the inflow portion 11 side of the confluence channel portion 90 A vortex is likely to be generated in the vicinity of the confluence portion 95 located at . In FIG. 13, the Z-axis runs vertically.

By arranging the branch flow path portion 80b vertically below the branch flow path portion 80a, the fluid flowing from the branch flow path portion 80a to the confluence flow path portion 90 merges with the fluid flowing from the branch flow path portion 80b by the action of gravity. A flow rate difference or a flow velocity difference is given between the fluid flowing into the flow path portion 90 and the fluid. For example, the flow rate of the fluid flowing from the branch flow path portion 80a to the confluence flow path portion 90 is greater than the flow rate of the fluid flowing from the branch flow path portion 80b to the confluence flow path portion 90 by the force of gravity. In accordance with this flow rate difference or flow velocity difference, a vortex is likely to occur in the vicinity of the junction 95 where the fluids join, and the retention time of the fluid in the vicinity of the junction 95 increases.

In FIG. 13, a vortex 96 represents a vortex generated in the vicinity of the confluence portion 95 . The vortex 96 shown in FIG. 11 is an example shown for convenience of explanation, and the direction and size of the vortex are not limited to this.

Since the first light source 71 is arranged near the junction 95 , the fluid staying near the junction 95 is efficiently irradiated with the ultraviolet light from the first light source 71 . As a result, the accumulated illuminance of the ultraviolet light emitted from the first light source 71 to the fluid stagnating in the vicinity of the confluence portion 95 increases according to the residence time, so that the fluid ultraviolet light treatment apparatus 1 has a treatment effect using ultraviolet light. can increase

(Fifth example of fluid retention action)
Next, FIG. 14 is a cross-sectional view of the fluid ultraviolet light processing apparatus 1 for explaining a fifth example of fluid retention action.

As in the fourth example described above, in the fifth example as well, when the branching flow path portion 80b is arranged vertically below the branching flow path portion 80a, the fluid flowing from the branching flow path portion 80a into the merged flow path portion 90 is , and the fluid flowing from the branch channel portion 80b to the confluence channel portion 90, a difference in flow rate or flow velocity is provided. Due to this flow rate difference or flow velocity difference, the fluid flows in a meandering manner through the confluence channel portion 90 as shown in FIG. 14 .

In FIG. 14, a flow 97 represents a flow of fluid flowing into the confluence flow path portion 90 from the branch flow path portions 80a and 80b, and a flow 98 represents a fluid flow meandering through the confluence flow path portion 90. ing. For example, the flow rate of the fluid flowing from the branch flow path portion 80a to the confluence flow path portion 90 is greater than the flow rate of the fluid flowing from the branch flow path portion 80b to the confluence flow path portion 90 by the force of gravity. Immediately after, the fluid tends to flow vertically downward through the confluence channel portion 90 . In other words, the vector in the traveling direction of the fluid from the inflow portion 11 to the outflow portion 15 immediately after joining at the confluence flow passage portion 90 is such that the flow rate of the branch flow passage portions 80a and 80b is smaller than the X axis. It tends to tilt to the side. The side of the branched channel portions 80a and 80b where the flow rate is low is the vertically downward side here.

The fluid that flows through the confluence channel portion 90 in a state in which the traveling direction vector is tilted vertically downward is bounced vertically upward by the third partitioning member 63, and this time the traveling direction vector is tilted vertically upward. In this state, the fluid flows through the confluence channel portion 90 and is then rebounded vertically downward by the second partitioning member 62 . By repeating such an operation, the fluid meanders through the confluence channel portion 90 .

It is thought that the fluid stays in the merged flow path portion 90 for a longer time because the fluid meanders through the merged flow path portion 90 and the length of the fluid flowing through the merged flow path portion 90 increases. Note that the flows 97 and 98 shown in FIG. 14 are examples shown for convenience of explanation, and the directions and sizes of the flows are not limited to these.

Here, meandering of the fluid such as the flow 98 is a phenomenon that occurs more conspicuously because the branch flow path portions 80a and 80b are separated from each other by the second partitioning member 62 and the third partitioning member or the like. In other words, the fluid ultraviolet light treatment device 1 is provided with the branched flow path portions 80a and 80b that are separated from each other, thereby imparting a flow rate difference or a flow velocity difference to the fluid flowing through the branched flow path portions 80a and 80b. It is possible to make the fluid meander easily.

For example, if each of the plurality of flow paths has an annular shape in a cross section orthogonal to the direction of fluid flow, a multi-pipe structure in which the plurality of flow paths are arranged concentrically can be constructed. However, in the case of such a multi-pipe structure, since the flow paths are connected in the circumferential direction, it is structurally difficult to impart a flow rate difference or a flow velocity difference to the fluid flowing through each of the plurality of flow paths. Therefore, it is difficult to cause the fluid to meander like the flow 98 in a configuration in which each of the plurality of flow paths has an annular shape.

The first light source 71 is arranged so that the fluid flowing through the confluence channel portion 90 is efficiently irradiated with the ultraviolet light from the first light source 71 . By lengthening the residence time by making the fluid flowing through the confluence channel portion 90 meander, the integrated illuminance can be increased, and the processing effect of the fluid ultraviolet light treatment apparatus 1 by ultraviolet light can be enhanced.

Further, when the fluid is water, for example, bacteria and viruses in the water have a higher specific gravity than water. It is thought that the residence time in Therefore, the fluid ultraviolet light treatment device 1 can increase the integrated illuminance of the ultraviolet light for bacteria and viruses in the water, and can enhance the treatment effect by the ultraviolet light.

(Sixth example of fluid retention action)
Next, FIG. 15 is a cross-sectional view of the fluid ultraviolet light processing apparatus 1 for explaining a sixth example of fluid retention action.

In the sixth example, the length along the direction orthogonal to the direction of fluid flow of at least one of the plurality of branched channel portions is the length along the direction orthogonal to the direction of fluid flow of the other branched channel portions. is different from In the example shown in FIG. 15, the width w3 of the branched channel portion 80a and the width w4 of the branched channel portion 80b are different in the direction orthogonal to the direction in which the fluid flows. The difference between the width w3 of the branched flow path portion 80a and the width w4 of the branched flow path portion 80b in the direction perpendicular to the direction of flow of the fluid facilitates the generation of eddies and meandering.

The direction perpendicular to the direction of fluid flow is, for example, the direction along the Y-axis or the direction along the Z-axis. Therefore, in the fluid ultraviolet light processing apparatus 1, the width w3 along the Y-axis and the width w4 along the Y-axis may be different, or the width w3 along the Z-axis and the width w4 along the Z-axis may be different. may be different. In addition, in the sixth example, there is no particular limitation on the installation direction of the fluid ultraviolet light processing apparatus 1 . This point also applies to fluid retention actions other than the fourth and fifth examples.

FIG. 15 shows a configuration in which the width w3 of the second flow channel portion 82a in the branch flow channel portion 80a is narrower than the width w4 of the second flow channel portion 82b in the branch flow channel portion 80b. Although illustrated, it is not limited to this. For example, the width w3 of the second flow path portion 82a may be made wider than the width w4 of the second flow path portion 82b to make them different. In addition, the width of the first flow channel portion 81a in the branch flow channel portion 80a and the width of the first flow channel portion 81b in the branch flow channel portion 80b may be different in the direction perpendicular to the direction in which the fluid flows. . In FIG. 15, the width of the first channel portion 81a and the width of the second channel portion 82a in the direction orthogonal to the direction of fluid flow are the same, but they may be different. Moreover, although the width of the first channel portion 81b and the width of the second channel portion 82b are the same, they may be different.

By making the width w3 and the width w4 different, a flow rate difference or Flow velocity difference is given. For example, when the width w3 is narrower than the width w4, the flow rate of the fluid flowing from the branch flow path portion 80a to the confluence flow path portion 90 is less than the flow rate of the fluid flowing into the confluence flow path portion 90 from the branch flow path portion 80b. Become. Depending on this flow rate difference or flow velocity difference, a vortex is likely to be generated near the confluence portion 95 where the fluids merge, and the retention time of the fluid near the confluence portion 95 increases. In addition, the residence time of the fluid in the confluence channel portion 90 is lengthened by the meandering flow of the fluid in the confluence channel portion 90 according to the flow rate difference or the flow velocity difference.

The effects of the vortices such as the vortex 96 at the confluence portion 95 are the same as those described in the fourth example. Further, the effects of meandering of the flow 98 and the like in the fluid flowing through the confluence channel portion 90 are the same as those described in the fifth example.

In the embodiment, two branched flow path portions 80a and 80b are exemplified as the plurality of branched flow path portions, but the configuration is not limited to this. When the fluidic ultraviolet light treatment device 1 has three or more branched flow passages, the length of at least one of the three or more branched flow passages along the direction perpendicular to the direction of fluid flow. If the length is different from the length along the direction orthogonal to the direction of fluid flow in the other branched channel portions, the effects described in the sixth example can be obtained.

(Seventh example of fluid retention action)
Next, FIGS. 16 to 18 are diagrams of the fluid ultraviolet light treatment device 1 for explaining a seventh example of fluid retention action, FIG. 18 is a sectional view taken along line XVII--XVII of FIG. 17, and FIG. 18 is a sectional view taken along line XVIII--XVIII of FIG.

16 to 18 , the hollow arrow indicates one of the main streams of fluid that flows into the fluidic ultraviolet light treatment device 1 through the inflow portion 11 and out of the fluidic ultraviolet light treatment device 1 through the outflow portion 15 . It shows the flow of the department. 16 to 18 , dot-hatched arrows indicate the flow of the fluid used for cooling the second light source 72 among the fluids flowing inside the fluid ultraviolet light processing apparatus 1 .

As shown in FIG. 17, the width w5 of the branch flow path portion 80a in the direction orthogonal to the extending direction of the branch flow path portions 80a and 80b, the folded portion 93a2 in the direction along the extending direction of the branch flow path portions 80a and 80b, and the If the width w6 of 93b2 is different from the width w6, a vortex is likely to occur.

The extending direction of the branched channel portions 80a and 80b is, for example, the direction along the X-axis. The direction orthogonal to the extending direction of the branch flow passage portions 80a and 80b is, for example, the direction along the Y-axis or the direction along the Z-axis. Therefore, in the fluid ultraviolet light processing apparatus 1, the width w5 along the Y axis and the width w6 along the X axis may be different, or the width w5 along the Z axis and the width w6 along the X axis may be different. may be different.

By making the width w5 and the width w6 different, a flow rate difference or a flow velocity difference is given between the fluid flowing through the branch flow path portions 80a and 80b and the fluid flowing through the folded portions 93a2 and 93b2. According to this flow rate difference or flow velocity difference, vortices are likely to occur in the vicinity of each of the folded portions 93a2 and 93b2, and the retention time of the fluid in the vicinity of each of the folded portions 93a2 and 93b2 increases.

The effects of fluid retention in the vicinity of each of the folded portions 93a2 and 93b2 are the same as those described in the above second example. Also, the same effect of fluid retention can be obtained at the folded portions 93a1 and 93a2.

In addition, in the fluid ultraviolet light processing apparatus 1 shown in FIG. 17, the length in the X-axis direction of each of the first channel portions 81a and 81b and the second channel portions 82a and 82b is, for example, 200 mm. Further, the width in the Z-axis direction of each of the first channel portions 81a and 81b and the second channel portions 82a and 82b is, for example, 24 mm. The width of each of the first channel portions 81a, 81b and the second channel portions 82a, 82b in the Y-axis direction is, for example, 60 mm. The flow rate of the fluid flowing through the fluid ultraviolet light treatment apparatus 1 shown in FIG. 17 is preferably 3 m ³ /h or more. By ensuring a flow rate of 3 m ³ /h or more, it is possible to prevent air bubbles from remaining inside the fluid ultraviolet light treatment apparatus 1 . This suppresses a decrease in the integrated illuminance due to reflection or scattering of the ultraviolet light emitted from the first light source 71 and the second light source 72 by the air bubbles, and the fluid ultraviolet light treatment device 1 reduces the integrated illuminance of the ultraviolet light. can be increased, and the treatment effect by ultraviolet light can be enhanced. In addition, in the fluid ultraviolet light processing device 1, it is possible to suppress a decrease in heat transfer efficiency due to air bubbles entering the downstream channel portion 110, and suppress a decrease in cooling efficiency of the second light source 72 due to the fluid flowing in the downstream channel portion 110. can. In addition, the dimensions of the fluid ultraviolet light processing apparatus 1 and the flow rate of the fluid are not limited to those described above.

The embodiments of the present invention have been described above with reference to specific examples. However, the invention is not limited to these specific examples. Based on the above-described embodiment of the present invention, all forms that can be implemented by those skilled in the art by appropriately designing and changing are also included in the scope of the present invention as long as they include the gist of the present invention. In addition, within the scope of the idea of the present invention, those skilled in the art can conceive of various modifications and modifications, and these modifications and modifications also belong to the scope of the present invention.

DESCRIPTION OF SYMBOLS 1... Fluid ultraviolet light processing apparatus, 10... 1st end part, 11... Inflow part, 15... Outflow part, 20... Second
End portion 50 Intermediate portion 71 First light source 72 Second light source 80a, 80b Branch channel portion
81a, 81b...first channel portion, 82a, 82b...second channel portion, 90...confluence channel portion, 100
Main flow path portion 110 First main flow path portion 120 Second main flow path portion 170 Light source 171 Wiring board 172 Case including light emitting element 173 Holding member 174 Wiring 176 Spring member 181...first area 182...second area 183...third area 200...secondary flow path part 2
DESCRIPTION OF SYMBOLS 10... 1st sub-channel part, 220... 2nd sub-channel part, 230... 1st connection part, 240... 2nd connection part, 270... Light source, 271... Wiring board, 272... Case containing a light emitting element, 273 ... holding member,
274... Wiring 276... Spring member 281... First area 282... Second area 283... Third area
Area 286 Cover glass 291 Waterproof cap 91 End 92, 97 Flow 93a1, 93a2, 93b1, 93b2 Turning portion 94a1, 94a2, 94b1, 94b2, 96 Eddy 95 Merging portion , 98 flow

Claims (11)

a fluid inflow section and a fluid outflow section;
a main channel portion connecting the inflow portion and the outflow portion;
a secondary flow path section connected to the main flow path section and having a cross-sectional area smaller than that of the main flow path section perpendicular to the direction in which the fluid flows;
a light source disposed between the main channel portion and the sub-channel portion and capable of irradiating the main channel portion with ultraviolet light;
a first connecting portion to which the sub-channel portion is connected to a part of the main channel; a second connecting portion;
A fluid ultraviolet light treatment device comprising: 2. The fluid ultraviolet light processing apparatus according to claim 1, wherein said second connection portion is arranged downstream of said first connection portion. The fluid ultraviolet light processing device according to claim 1 or 2, wherein the first connecting portion is arranged upstream of the light source. The fluid ultraviolet light processing device according to claim 1 or 2, wherein the first connecting portion is arranged downstream of the light source. The fluid ultraviolet light processing device according to any one of claims 1 to 3, wherein the second connecting portion is arranged upstream of the light source. The fluid ultraviolet light processing device according to any one of claims 1 to 4, wherein the second connecting portion is arranged downstream of the light source. The main flow passage portion includes a first main flow passage portion arranged on the upstream side and a second main flow passage portion arranged on the downstream side and having a cross-sectional area orthogonal to the direction in which the fluid flows is smaller than that of the first main flow passage portion. and
The fluid ultraviolet light processing device according to any one of claims 1 to 6, wherein the first connection portion is arranged in the first main flow passage portion, and the second connection portion is arranged in the second main flow passage portion. . the sub-channel portion has a first sub-channel portion connected to the first connection portion side and a second sub-channel portion connected to the second connection portion side;
the first sub-flow path portion extends in a direction away from the main flow path portion in a direction orthogonal to a fluid flow direction of the main flow path portion;
1-, wherein the second sub-channel portion extends in a direction different from the extending direction of the first sub-channel portion;
8. The fluid ultraviolet light treatment device according to any one of 7. 9. The fluid ultraviolet light processing apparatus according to claim 1, wherein the light source is capable of irradiating ultraviolet light onto the sub-channel portion. 3. The fluidic ultraviolet light processing device according to claim 1, wherein the fluid ultraviolet light processing device has a plurality of sub-channels, and the light source is arranged between each of the sub-channels and the main channel. further comprising a partition separating the light source and the sub-channel,
The light source has a first surface from which light is emitted, a second surface located on the opposite side of the first surface, and a spring member provided on the first surface side,
11. The light source according to any one of claims 1 to 10, wherein the light source is arranged with the spring member elastically deformed, and the second surface of the light source is pressed against the partition wall by a restoring force of the spring member. fluid ultraviolet light treatment device.

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