TWI753132B - Fluid sterilization device - Google Patents

Abstract

The present invention provides a fluid sterilization device capable of improving the ultraviolet irradiation efficiency to the fluid in the flow path. The fluid sterilizing apparatus according to the embodiment includes: a flow path member having a first flow path for flowing the fluid; and a light source arranged to face a flow path cross section of the first flow path that intersects the flow direction of the fluid, and has a A light-emitting element for irradiating ultraviolet rays in a first flow path; a connection member connected to one end of the flow path member and provided with a light source, and having a second flow path arranged around the light source and communicated with the first flow path, and a pair of light-emitting elements a support portion for supporting; and a cover member that protects the light source from fluid. The light source has a placement surface on which the light-emitting element is placed, and the placement surface is located in the first flow path.

Description

Fluid sterilization device

Embodiments of the present invention relate to a fluid sterilization device.

There is known a fluid sterilization device that sterilizes fluid by irradiating ultraviolet rays emitted from a light-emitting element of a light source into a flow path of a flow path member through which a fluid such as water and gas flows. [Prior Art Document] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2014-233646

[Problem to be Solved by the Invention] As a fluid sterilizing device, a structure is proposed in which a light source for irradiating ultraviolet rays into the flow path of the flow path member is provided at one end of the flow path member, and the difference between the light source and the flow path member is The flow-path cross-sections in which the flow directions of the fluids are orthogonal are arranged to face each other. In such a fluid sterilizing device, both ends of the flow path member having the flow path irradiated with ultraviolet rays are connected to the upstream flow path and the downstream flow path of the flow path member, respectively, via the connecting member. A light source is provided inside one of the connection members, and a flow path for flow is formed along the periphery of the light source.

Inside the connection member included in the fluid sterilizing device, a housing recess for housing the light-emitting element is provided, and the opening of the housing recess is closed by a cover member having ultraviolet transmissivity. Thereby, the light-emitting element of the light source is protected from the fluid flowing around the light source. Therefore, among the light emitted by the light-emitting elements arranged in the housing recess, the light incident toward the outer peripheral portion side of the cover member is blocked by the inner wall of the housing recess and does not reach the flow path of the flow path member, thereby causing a disturbance to the fluid. The efficiency of UV irradiation decreases.

Therefore, an object of the present invention is to provide a fluid sterilizing device capable of improving the ultraviolet irradiation efficiency to the fluid in the flow path. [Technical means to solve the problem]

The fluid sterilizing apparatus according to the embodiment includes: a flow path member having a first flow path through which a fluid flows; and a light source arranged to face a flow path cross section of the first flow path that intersects the flow direction of the fluid , and has a light-emitting element that irradiates ultraviolet rays into the first flow path; a connecting member is connected to one end of the flow path member and is provided with the light source, and has a surrounding of the light source and communicated with the A second flow path of the first flow path, and a support portion for supporting the light-emitting element; and a cover member for protecting the light source from the fluid, the light source having a mounting surface on which the light-emitting element is mounted, The mounting surface is located in the first flow path, and the cover member transmits ultraviolet rays traveling along the boundary line of the maximum emission angle of the light source when viewed from the direction along the mounting surface. [Effect of invention]

ADVANTAGE OF THE INVENTION According to this invention, the ultraviolet irradiation efficiency with respect to the fluid in a flow path can be improved.

The fluid sterilizing apparatus of the embodiment described below includes a flow path member, a light source, a connection member, and a cover member. The flow path member has a first flow path through which the fluid flows. The light source is arranged so as to face the flow path cross section of the first flow path that intersects with the flow direction of the fluid. The light source has a light-emitting element that irradiates ultraviolet rays into the first flow path. The connection member is connected to one end of the flow path member, and is provided with a light source. The connection member has a second flow path and a support portion. The second flow path is arranged around the light source. The second flow path communicates with the first flow path. The support portion supports the light-emitting element. The cover member protects the light source from the fluid. The light source has a placement surface on which the light-emitting element is placed. The placement surface is located in the first flow path. The cover member transmits the ultraviolet rays traveling along the boundary line of the maximum emission angle of the light source when viewed from the direction along the placement surface.

In addition, a reflection surface is provided on the outer peripheral surface of the flow channel member in the fluid sterilizing apparatus of the embodiment described below. The reflection surface reflects the ultraviolet rays irradiated into the first flow path by the light-emitting element into the first flow path. The reflection surface extends along the outer peripheral surface of the flow channel member to the light source side from the position where the boundary line of the maximum emission angle of the light source intersects the inner surface of the first flow channel when viewed from the direction along the placement surface.

Moreover, the 2nd flow path in the fluid sterilization apparatus of embodiment demonstrated below has a connection path. The connection path is connected to one end of the first flow path. The flow direction of the connection passage is inclined at an obtuse angle with respect to the flow direction of the first flow passage.

Moreover, the 2nd flow path in the fluid sterilization apparatus of embodiment demonstrated below has a connection path. The connection path is connected to one end of the first flow path. The flow direction of the connection passage is the same as the flow direction of the first flow passage.

Hereinafter, the fluid sterilizing apparatus of the embodiment will be described with reference to the drawings. In addition, the following embodiment shows an example, and does not limit this invention.

(1st Embodiment) FIG. 1 : is a schematic diagram which shows the whole fluid sterilization apparatus of 1st Embodiment. 2 is a cross-sectional view showing a main part of the fluid sterilizing device according to the first embodiment. 3 is an enlarged cross-sectional view showing a light source part included in the fluid sterilizing device according to the first embodiment. It is a schematic diagram for demonstrating the positional relationship of the light-emitting element which the fluid sterilizing apparatus of 1st Embodiment has, and the reflection surface of a reflection film. 5 is a cross-sectional view showing the direction in which the fluid flows in the flow channel member in the main part of the fluid sterilizing device according to the first embodiment.

(Configuration of Fluid Sterilization Device) As shown in FIG. 1 , in the fluid sterilization device 1 according to the first embodiment, a flow path member 13 for flowing a fluid irradiated with ultraviolet rays (ultraviolet light) is connected to a water supply tank for supplying the fluid. ) 6, and is connected to a recovery tank 7 for recovering the fluid irradiated with ultraviolet rays. As shown in FIGS. 1 and 2 , in the fluid sterilizing device 1 , the upstream side of the flow path member 13 is connected to the water supply tank 6 via the upstream side flow path member 8 . The upstream flow path member 8 is provided with a pump 11 that sends the fluid from the water supply tank 6 to the fluid sterilizing device 1 . In addition, in the fluid sterilization device 1 , the downstream side of the flow path member 13 is connected to the recovery tank 7 via the downstream side flow path member 9 similarly to the upstream side of the flow path member 13 . The downstream flow path member 9 is provided with a flow rate adjustment mechanism 12 that adjusts the flow rate of the fluid sent from the fluid sterilizing device 1 to the recovery tank 7 .

The fluid sterilization device 1 is used, for example, in a drinking water supply device to sterilize the water in the water supply tank 6 . In the present embodiment, as the fluid, for example, water such as tap water is applied, but it can also be applied to gas.

As shown in FIG. 2 , the fluid sterilizing device 1 includes: a flow path member 13 having a flow path 13a as a first flow path for flowing a fluid; and a light source unit 15 having a flow path 13a extending into the flow path member 13 Light Emitting Diode (LED) 23 as a light emitting element that irradiates ultraviolet rays. Further, the fluid sterilizing device 1 includes: a first connecting member 17 connected to one end of the flow path member 13; a second connecting member 18 connected to the other end of the flow path member 13; and a connecting member 19 connecting the first connecting member 17 with the second connecting member 18 .

The flow path member 13 is preferably formed of a material that has a high ultraviolet reflectance and suppresses deterioration due to ultraviolet rays. In the present embodiment, as the flow path member 13, a transparent quartz tube is used, and a reflection film 13b as a reflection surface having a high ultraviolet reflectance is formed on the entire outer peripheral surface of the quartz tube. The reflection film 13b is an example of a reflection surface that reflects the ultraviolet rays irradiated into the flow channel 13a by the LEDs 23 of the light source unit 15 to the reflection surface in the flow channel 13a, for example, a silicon dioxide (silica) film is used.

In addition, the reflection film 13b formed on the flow path member 13 is not limited to a silicon dioxide film, and may be an aluminum vapor deposition film. In addition, the flow path member 13 is not limited to a transparent quartz tube, and may be a fluororesin such as polytetrafluoroethylene (PTFE) (a polymer of tetrafluoroethylene) with high reflectivity. In addition, the reflection film 13 b may not be formed on the outer peripheral surface of the flow channel member 13 but may be formed on the inner peripheral surface of the flow channel member 13 .

As shown in FIG. 3 , the light source unit 15 is provided inside the first connection member 17 . The light source unit 15 includes the light source 16 and a cover member 21 that protects the light source 16 from fluid. The light source 16 is disposed on one end side of the flow path member 13 to face a flow path cross section of the flow path 13 a perpendicular to the flow direction of the fluid (hereinafter referred to as a flow path cross section of the flow path 13 a ). Moreover, the light source 16 of the light source part 15 is arrange|positioned at the light source support part 17b-3 mentioned later which the 1st connection member 17 has.

The light source 16 is a light module, and includes LEDs 23 as light-emitting elements that emit ultraviolet rays, and a substrate 24 on which the LEDs 23 are mounted. The board|substrate 24 is formed using a metal material as a base material, and has the mounting surface 24a which is a mounting surface on which the LED23 is mounted. On the mounting surface 24 a of the substrate 24 , although not shown, a desired conductive pattern (wiring pattern) is formed via an insulating layer, and the LEDs 23 are provided on the conductive pattern. In addition, the base material of the board|substrate 24 is not limited to a metal material, For example, ceramics (ceramics), such as alumina (alumina), may be used. In addition, the light-emitting element included in the light source 16 is not limited to the LED 23 , and other semiconductor elements such as a laser diode (LD) can also be used.

The light source 16 is supplied with electric power from an unillustrated power source, and causes the LED 23 to emit light. The light source 16 is arranged so that the light emitting surface of the LED 23 faces the flow path cross section of the flow path 13a, for example, the main surface of the substrate 24 of the light source 16 is substantially perpendicular to the flow direction of the flow path 13a. Here, the "light emitting surface of the LED 23" does not simply mean only the light emitting region of the LED 23, but refers to the entire main surface of the substrate 24 on which the LED 23 is arranged. In addition, the direction "the light emitting surface of the LED 23 and the flow path cross section of the flow path 13a face each other" is not limited to the direction facing each other in parallel. For example, the angle (acute angle) formed by the light emitting surface of the LED 23 and the flow path cross section of the flow path 13 a is allowed to be about ±10° at the maximum.

Moreover, as LED23, it is preferable that it has a peak wavelength in the vicinity of 275 nm which has a relatively high sterilization effect, but the wavelength of ultraviolet rays is not limited as long as it is a wavelength band which has a sterilization effect.

The cover member 21 of the light source unit 15 is, for example, an ultraviolet-ray transmissive member formed of a glass material, and is arranged to cover the LEDs 23 and the substrate 24 . The outer peripheral portion of the cover member 21 extends so as to cover the side surface side of the substrate 24 . The cover member 21 is fixed to the light source support part 17b-3 mentioned later which the 1st connection member 17 has, and the inside of the light source part 15 is hermetically sealed. The cover member 21 transmits ultraviolet rays emitted from the LEDs 23 to irradiate ultraviolet rays to the fluid flowing in the flow path 13 a and the fluid flowing in the later-described flow paths 17 a - 1 and 17 a - 2 included in the first connection member 17 . In addition, although the surface of the cover member 21 facing the flow path cross section of the flow path 13a in the embodiment is formed as a flat surface, it may be formed as a curved surface to reduce the flow resistance of the fluid flowing around the cover member 21 .

As shown in FIGS. 3 and 4 , in the light source unit 15 , the mounting surface 24 a of the substrate 24 serving as the mounting surface on which the LEDs 23 are mounted is located in the flow channel 13 a of the flow channel member 13 . As will be described later, the entire LED 23 mounted on the mounting surface 24a of the board 24 is arranged in the flow channel 13a through the light source supporting portion 17b-3 of the first connecting member 17 protruding from the side of the first connecting member 17 into the flow channel 13a. Inside Road 13a. Therefore, among the ultraviolet rays emitted by the LEDs 23 , especially the ultraviolet rays traveling in the direction with a small angle with the mounting surface 24a of the substrate 24 can also be incident on the flow path 13a, and the utilization efficiency of the ultraviolet rays emitted by the LEDs 23 is improved.

In addition, as shown in FIG. 4, regarding the mounting surface 24a of the board 24 on which the LEDs 23 are mounted, when viewed from the direction along the mounting surface 24a (the direction orthogonal to the flow direction of the flow path 13a), the reflection as a reflective surface The film 13b extends along the outer peripheral surface of the flow channel member 13 to a position P where the maximum emission angle of the light source portion 15, which is the half-value angle θ of the LED 23 in this embodiment, intersects the inner surface P of the flow channel 13a. Light source 16 side. Thereby, the ultraviolet rays traveling along the boundary line L of the half-value angle θ among the ultraviolet rays emitted by the LEDs 23 can be incident on the reflection film 13b and reflected by the reflection film 13b into the flow path 13a, thereby improving the utilization efficiency of the ultraviolet rays emitted by the LEDs 23 . In addition, as the LED23, for example, a half-value angle θ of about 120° is used.

In addition, the cover member 21 in this embodiment transmits the ultraviolet rays traveling along the boundary line L of the half-value angle θ of the light source 16 when viewed from the direction along the mounting surface 24 a of the substrate 24 . In other words, since the maximum emission angle of the light source 16 is smaller than the half-value angle θ of the LEDs 23 , it can be said that the cover member 21 extends along the boundary of the maximum emission angle of the light source 16 when viewed from the direction along the mounting surface 24 a of the substrate 24 . UV transmission of line advancement.

In addition, the reflection film 13b is desirably formed over the entire area of the outer peripheral surface of the flow channel member 13, but it is difficult to form the reflection film 13b in the area corresponding to the holding portion for holding the flow channel member 13, That is, the end portion of the flow path member 13 is formed with the reflective film 13b. Therefore, as described above, by extending one end of the reflective film 13b to the light source unit 15 side rather than the position P, the ultraviolet rays emitted from the LEDs 23 can be prevented from leaking to the outside of the flow path 13a to cause losses, and the utilization efficiency of the ultraviolet rays emitted by the LEDs 23 can be suppressed. improve.

The mounting surface 24a on which the LEDs 23 are placed may be arranged in the flow path 13a, and the direction (posture) of the mounting surface 24a with respect to the flow direction of the flow path 13a is not limited, but is increased based on the half-value angle θ of the LEDs 23. From the viewpoint of the utilization efficiency of the ultraviolet rays emitted from the LEDs 23, it is preferable that the mounting surface 24a is arranged in parallel with the flow channel cross section of the flow channel 13a.

In addition, the later-described flow path 17a-1 and the flow path 17a-2 included in the first connection member 17 are located in the vicinity of the light source 16, so they may be provided on the inner surface of the flow path 17a-1 and the flow path 17a-2 as necessary. Reflective film. With such a reflective film, the ultraviolet rays incident on the flow paths 17a-1 and 17a-2 from the flow path 13a side can be reflected into the flow path 13a, and the utilization efficiency of the ultraviolet rays emitted from the LEDs 23 can be improved.

The ultraviolet rays emitted from the LEDs 23 of the light source 16 are transmitted through the cover member 21 to irradiate direct light from the LEDs 23 to the fluid flowing in the flow path 13a, and are reflected in the flow path 13a as indicated by arrows in FIGS. 2 and 3 . The film 13b reflects, whereby the reflected light from the reflection film 13b is indirectly irradiated to the fluid flowing in the flow path 13a.

The light source 16 is provided inside the first connection member 17 , and along the periphery of the light source 16 are formed a flow path 17 a - 1 , a flow path 17 a - 2 , a flow path 17 a - 2 , a flow path 17 a - 2 , and a second flow path communicating with one end of the flow path 13 a . Path 17b-1, flow path 17b-2. In addition, one end portion of the connecting member 19 described later is fixed to the upstream flange 17 a of the first connecting member 17 .

The 1st connection member 17 is comprised by integrally fastening a pair of upstream flange 17a and the downstream flange 17b via the fastening member which is not shown in figure. The upstream flange 17a is disposed on the flow path member 13 side, and the downstream flange 17b is disposed on the opposite side of the flow path member 13 with the light source portion 15 therebetween.

The upstream flange 17a of the first connection member 17 has a flow path 17a-1 and a flow path 17a-2 as a second flow path. The upstream flange 17 a supports one end portion of the flow path member 13 via an O ring 25 . The upstream-side flange 17a and the downstream-side flange 17b are formed into a cylindrical shape from a material having a thermal conductivity above a predetermined level, for example, stainless steel. In addition, the upstream flange 17a and the downstream flange 17b are not limited to stainless steel, and may be formed of a composite material of aluminum with high thermal conductivity, or may be formed of a high thermal conductivity resin material mixed with ceramics or fillers. .

The flow path 17 a - 1 is located near the center of the upstream flange 17 a and communicates with one end of the flow path 13 a of the flow path member 13 . As shown in FIG. 7, the flow path 17a-2 communicates with the flow path 17a-1, and extends from the center of the upstream flange 17a toward the outer peripheral side. Therefore, the flow path 17a - 1 and the flow path 17a - 2 of the upstream flange 17a communicate with the flow path 13a of the flow path member 13 and are located in the vicinity of the light source 16 . As described above, the inner surface of the channel 17a-1 and the channel 17a-2 may be provided with a UV light that is incident on the channel 17a-1 and the channel 17a-2 from the channel 13a side and is reflected to the channel 13a. The reflective film can improve the utilization efficiency of the ultraviolet rays emitted by the LED23.

As shown in FIGS. 2 and 3 , the downstream flange 17b has a flow path 17b - 1 as a second flow path, a flow path 17b - 2 , and a light source support portion 17b - 3 as a support portion for supporting the light source 16 . The light source support part 17b-3 is formed in the area|region enclosed by the flow path 17b-1 and the flow path 17b-2. Therefore, the flow path 17b - 1 and the flow path 17b - 2 are arranged around the light source unit 15 provided inside the first connection member 17 .

Moreover, as shown in FIG.3 and FIG.4, the light source support part 17b-3 has the attachment part 17b-4 on which the board|substrate 24 of the light source 16 is attached. The attachment portion 17 b - 4 is formed to protrude toward the flow path 13 a along the flow direction of the flow path 13 a of the flow path member 13 . In the mounting portion 17b-4, a flat support surface 17b-5 that supports the substrate 24 is formed to face the flow channel cross section of the flow channel 13a, and is located in the flow channel 13a. In the attachment part 17b-4, the part protruding from the flat support surface 17b-5 toward the flow path 13a side is not formed. Therefore, in the light source support portion 17b-3, when the light source 16 is mounted on the support surface 17b-5 of the mounting portion 17b-4, the ultraviolet rays emitted from the LEDs 23 are transmitted on the same plane as the mounting surface 24a of the substrate 24. That is, in the attachment part 17b-4 of the light source support part 17b-3, the part which shields the ultraviolet-ray which LED23 emits is not formed. The ultraviolet rays emitted from the LEDs 23 are transmitted through the cover member 21 and are incident on the flow path 13a.

In the present embodiment, the mounting surface 24a of the substrate 24 is located in the flow channel 13a, but by configuring the support surface 17b-5 of the mounting portion 17b-4 to be located in the channel 13a, for example, the thickness of the substrate 24 and the like can be different. Regardless of whether or not, the entire LED 23 is arranged in the flow path 13a.

The downstream flange 17b is connected to the upstream flange 17a to connect the flow path 17b-1 and the flow path 17b-2. In addition, the downstream flange 17b is connected to the downstream flow path member 9 . In this way, the first connection member 17 supports, for example, the fluid flowing in from the flow path 13a of the flow path member 13 toward the light source through the flow path 17a-1 along the side surface of the mounting portion 17b-4 around the light source portion 15 in order. The flow path 17a-2 on the outer peripheral side of the portion 17b-3, the flow path 17b-1 passing through the vicinity of the outer periphery of the light source support portion 17b-3, and the flow path 17b-1 from the outer periphery of the light source support portion 17b-3 on the side opposite to the light emitting surface of the light source 16 The flow path 17b-2 extending in the vicinity of the center flows out to the downstream side flow path member 9.

The second connection member 18 is formed in a cylindrical shape, and connects the upstream flow path member 8 and the flow path member 13 . The second connection member 18 supports the other end of the flow path member 13 via the O-ring 25 . The other end part of the connection member 19 mentioned later is fixed to the outer peripheral part of the 2nd connection member 18.

As shown in FIGS. 3 and 5 , the fluid flowing from the flow path of the upstream flow path member 8 into the flow path 13 a of the flow path member 13 flows in the flow path 13 a as indicated by arrows in FIGS. 3 and 5 , and The flow path of the downstream side flow path member 9 flows out through the flow path 17a-1, the flow path 17a-2, the flow path 17b-1, and the flow path 17b-2 of the first connection member 17. When the fluid flowing into the first connection member 17 passes through the paths of the flow path 17a-1, the flow path 17a-2, the flow path 17b-1, and the flow path 17b-2, the fluid stored in the light source support portion 17b-3 is removed. The heat generated by the light source 16 flows out to the downstream flow path member 9 .

That is, the fluid sterilized by being irradiated with ultraviolet rays from the light source 16 in the flow path 13 a flows through the flow path 13 a of the flow path member 13 and flows toward the light emitting surface side of the light source 16 , and flows along the light emitting surface of the light source 16 . The flow path 17a-1 flows into the first connecting member 17, passes through a plurality of paths of the flow path 17a-1, the flow path 17a-2, the flow path 17b-1, and the flow path 17b-2, and flows out to the opposite surface of the light-emitting surface side. The multiple paths of the flow path 17a-1, the flow path 17a-2, the flow path 17b-1, and the flow path 17b-2 in the first connection member 17 extend along the circumference of the light source 16, and the fluid emits light from the light source 16. Pass through the face side to the opposite side. As a result, the light source 16 does not need to use another cooling member, but uses the fluid passing through the plurality of paths of the flow path 17a-1, the flow path 17a-2, the flow path 17b-1, and the flow path 17b-2 to indirectly but effectively obtain the cool down. In addition, the cooling of the light source 16 is performed by using the fluid passing through the plurality of paths of the flow path 17a-1, the flow path 17a-2, the flow path 17b-1, and the flow path 17b-2 without using another cooling member. No other cooling members such as fins are required. Thereby, the size of the fluid sterilizing device 1 can be reduced.

Furthermore, it is preferable to provide a thermally conductive member having a thermal conductivity above a predetermined level, such as aluminum or stainless steel, between the light source 16 accommodated in the light source support portion 17b-3 and the light source support portion 17b-3. The heat generated by the light source 16 is transferred to the fluid flowing in the first connection member 17 via the heat conducting member, and the light source 16 can be cooled more efficiently by the fluid.

In addition, the flow direction of the fluid in the flow path member 13 of the fluid sterilization device 1 is not limited to the direction shown in FIGS. 1 and 5 , and may be reversed from the direction shown in FIG. 5 . That is, although not shown, the first connection member 17 may be connected to the upstream flow path member 8 and the second connection member 18 may be connected to the downstream flow path member 9 . In the case of this configuration, the fluid flowing from the upstream flow path member 8 to the first connection member 17 passes through the flow path 17b-2, the flow path 17b-1, the flow path 17a-2, and the flow path 17a-1 in this order. It flows in the flow path 13 a and flows out of the flow path of the downstream side flow path member 9 . The flow direction of the fluid is not limited in the same manner in the second to fifth embodiments to be described later.

3 and 5 , the flow path member 13 is arranged so that the flow direction of the fluid in the flow path 13a is substantially perpendicular to the light emitting surface of the light source 16 of the light source unit 15, but it is not limited to being vertical, and may be The flow direction of the flow channel 13a is configured to form a predetermined angle with respect to the light emitting surface of the light source 16, or is configured to arbitrarily adjust the angle.

The connection member 19 is formed of, for example, a metal material such as stainless steel into a cylindrical shape that accommodates the flow path member 13 inside, and also functions as a cover member that covers and protects the outer periphery of the flow path member 13 . Flange portions 19 a are formed at both end portions of the connecting member 19 . The flange portion 19 a on the one end side of the connecting member 19 is fixed to the side surface of the upstream flange 17 a of the first connecting member 17 on the side of the flow channel member 13 , that is, to A plane in which the flow direction of the fluid in the flow path member 13 is orthogonal. Similarly, the flange portion 19 a on the other end side of the connection member 19 is fixed to the side surface of the second connection member 18 on the side of the flow channel member 13 , that is, to the flow of the fluid in the flow channel member 13 via the fastening member 27 . Orthogonal faces. In this way, the first connection member 17 and the second connection member 18 are connected to each other via the connection member 19 , whereby the supported state of both ends of the flow channel member 13 sandwiched between the first connection member 17 and the second connection member 18 is obtained. strengthen.

(II cross section (direction A) of the main part of the fluid sterilizing device) FIG. 6 is the main part of the fluid sterilizing device 1 according to the first embodiment, viewed from the direction A, which is perpendicular to the direction in which the fluid flows in the flow channel member 13 . Sectional view of Section II.

In FIGS. 2 and 5 , when the I-I cross section is viewed from the direction A in the drawings, as shown in FIG. 6 , the downstream flange 17 b and the light source 16 are arranged. When the I-I cross section in FIGS. 2 and 5 is viewed from the A direction, as shown in FIG. 6 , the downstream flange 17b has a circular shape and has a concave light source support portion 17b-3 near its center. Moreover, in the light source support part 17b-3, the light source 16 is accommodated so that the irradiation direction of the ultraviolet-ray from the LED23 may face the flow path 13a side.

In addition, around the light source support portion 17b-3, a plurality of flow paths 17b-1 are provided at intervals along a concentric circle with the LED 23 as the center. The plurality of flow passages 17b-1 are formed by through-holes penetrating from the light-emitting surface side to the opposite surface side of the light source 16 in the downstream flange 17b around the periphery of the light source 16.

In addition, the number of objects of LED23 mounted on the board|substrate 24 and the number of objects of the flow path 17b-1 are not limited to the object number shown in FIG. 6, It can change as needed.

(II cross section (direction B) of the main part of the fluid sterilizing device) FIG. 7 is the main part of the fluid sterilizing device 1 according to the first embodiment, viewed from the B direction, which is perpendicular to the direction in which the fluid flows in the flow channel member 13 . Sectional view of Section II.

In FIGS. 2 and 5 , when the I-I cross section is viewed from the direction B in the figures, as shown in FIG. 7 , the upstream flange 17 a and the light source 16 are arranged. As shown in FIG. 7 , the upstream flange 17a has a circular shape when viewed from the B direction in the figures, and has a circular cross-sectional flow that communicates with the flow channel 13a in the vicinity of the center thereof, as shown in FIG. 7 . The channel 17a-1 has a plurality of flow channels 17a-2 radially extending from the flow channel 17a-1 toward the outer peripheral side of the upstream flange 17a. Moreover, inside the 1st connection member 17, the cover member 21 is arrange|positioned adjacent to the flow path 17a-1 and the flow path 17a-2.

The first connecting member 17 connects a pair of upstream flanges 17a and a downstream flange 17b to connect the radially extending distal end portions of the flow passages 17a-2 shown in FIG. 7 and the corresponding positions. The respective flow paths 17b-1 shown in 6 are respectively connected.

As described above, the fluid sterilizing device 1 according to the first embodiment includes the light source 16 arranged to face the flow channel cross section of the flow channel 13a of the flow channel member 13, and the mounting surface 24a of the substrate 24 on which the LEDs 23 of the light source 16 are placed is located in the flow channel within 13a. The light source support portion 17b-3 transmits the ultraviolet rays emitted from the LEDs 23 on the same plane as the mounting surface 24a of the substrate 24. As shown in FIG. The cover member 21 transmits the ultraviolet rays advancing along the boundary line L of the half-value angle θ of the LEDs 23 when viewed from the direction along the mounting surface 24a. Thereby, since the LED23 whole is arrange|positioned in the flow path 13a, the utilization efficiency of the ultraviolet-ray which LED23 emits improves, and the irradiation efficiency of the ultraviolet-ray with respect to the fluid in the flow path 13a can be improved.

In addition, in the fluid sterilizing device 1, by arranging the LEDs 23 as a whole in the flow path 13a, it is not necessary to use an optical system such as an optical lens that refracts the ultraviolet rays emitted from the LEDs 23 and enters the flow path 13a, and the utilization of ultraviolet rays can be improved with a simple structure. efficient.

In addition, when viewed from the direction along the mounting surface 24a of the substrate 24, the reflective film 13b provided on the outer peripheral surface of the flow channel member 13 included in the fluid sterilizing device 1 extends along the outer peripheral surface of the flow channel member 13 to be larger than the LEDs 23 The position P where the boundary line L of the half-value angle θ intersects with the inner surface of the flow path 13 a is closer to the LED 23 side. Thereby, the ultraviolet rays traveling along the boundary line L of the half-value angle θ among the ultraviolet rays emitted by the LEDs 23 can be reflected by the reflection film 13b into the flow path 13a, and the utilization efficiency of the ultraviolet rays emitted by the LEDs 23 can be improved.

(Modification) Here, the modification of the cover member 21 in 1st Embodiment is demonstrated. For the sake of convenience, the same reference numerals as those of the cover member 21 are also attached to the modified examples for description. FIG. 8 is a schematic diagram showing a modification of the cover member 21 included in the fluid sterilizing device according to the first embodiment. The cover member 21 of the modified example is different from the cover member 21 in the first embodiment in that it is formed in a flat plate shape. As shown in FIG. 8 , the cover member 21 has only a flat portion facing the mounting surface 24 a of the substrate 24 , and the outer peripheral portion does not extend toward the side surface of the substrate 24 . A peripheral wall 17b-6 surrounding the light source 16 is formed around the support surface 17b-5 of the mounting portion 17b-4. The outer peripheral portion of the flat cover member 21 is airtightly fixed to the peripheral wall 17b-6 of the attachment portion 17b-4. In addition, the cover member 21 of the modified example is formed in a size that transmits ultraviolet rays traveling along the boundary line L' of the maximum emission angle θ' of the light source 16 when viewed from the direction along the mounting surface 24a of the substrate 24 .

In the structure shown in FIG. 8 , the maximum emission angle θ′ of the light source 16 is smaller than the half-value angle θ of the LED 23 . The reflective film 13b extends to be closer to the light source 16 than the position P where the boundary line L' of the maximum emission angle θ' of the light source 16 intersects the inner surface of the flow path 13a. In this way, among the ultraviolet rays emitted by the light source 16, the ultraviolet rays traveling along the boundary line L' of the maximum emission angle θ' can be incident on the reflection film 13b, and reflected by the reflection film 13b into the flow path 13a, so that the emission of the light source 16 can be improved. UV utilization efficiency. Here, the "maximum emission angle θ' of the light source 16" refers to the maximum emission angle in a state where the cover member 21 for protecting the light source 16 is attached.

Hereinafter, a fluid sterilizing apparatus according to another embodiment will be described with reference to the drawings. In other embodiment, the same code|symbol as 1st Embodiment is attached|subjected about the same structural member as 1st Embodiment, and description is abbreviate|omitted. In addition, although the internal shape (flow path) of the 1st connection member 17 of 2nd Embodiment and 3rd Embodiment differs from 1st Embodiment, it will be described by attaching the same code|symbol as 1st Embodiment for convenience.

(Second Embodiment and Third Embodiment) FIG. 9 is a cross-sectional view showing a main part of a fluid sterilizing apparatus according to a second embodiment. 10 is a cross-sectional view showing a main part of a fluid sterilizing apparatus according to a third embodiment. The direction of the flow path of the first connecting member 17 connected to the flow path 13a in the second and third embodiments is different from that in the first embodiment.

As shown in FIG. 9 , the first connecting member 17 in the fluid sterilizing device 2 of the second embodiment has a flow path 17b-1 as a connecting path connected to one end of the flow path 13a of the flow path member 13, and the flow path 17b- The flow direction of 1 is inclined at an obtuse angle _θO with respect to the flow direction of the flow path 13a. In other words, the flow path 17b-1 is inclined with respect to the flow direction of the flow path 13a so that the fluid flows from the inner side toward the outer side in the radial direction of the flow path 13a as it moves away from the flow path 13a side. In addition, the flow path 17b-1 is connected to the flow path 17b-2.

In addition, as shown in FIG. 10 , the first connection member 17 in the fluid sterilization device 3 of the third embodiment has a flow path 17b-1 as a connection path connected to one end of the flow path 13a of the flow path member 13, and the flow path The flow direction of 17b-1 is the same as the flow direction of the flow path 13a. In other words, the flow direction of the flow path 17b-1 coincides with the flow direction of the flow path 13a, thereby suppressing a change in the flow direction of the fluid between the flow path 13a and the flow path 17b-1. In addition, the flow path 17b-1 is connected to the flow path 17b-2.

Compared with the first embodiment, in the second and third embodiments, the flow resistance of the fluid flowing from the flow channel 13a to the flow channel 17b-1 or from the flow channel 17b-1 to the flow channel 13a is suppressed, Therefore, the fluid can smoothly flow between the flow path 13 a of the flow path member 13 and the flow path 17 b - 1 of the first connection member 17 .

Furthermore, in the second embodiment and the third embodiment, a reflection film or a reflection plate may be provided on the inner surface of the flow path 17b-1. With such a reflective film or the like, the ultraviolet rays incident on the flow path 17b-1 from the flow path 13a side can be reflected into the flow path 13a, and the utilization efficiency of the ultraviolet rays emitted from the LEDs 23 can be improved.

(Fourth Embodiment) FIG. 11 is a cross-sectional view showing a main part of a fluid sterilizing apparatus according to a fourth embodiment. The fourth embodiment is different from the first embodiment in that the ultraviolet rays are reflected on the inner surface of the connecting member. As shown in FIG. 11 , the connecting member 19A included in the fluid sterilizing apparatus 4 according to the fourth embodiment is formed in a cylindrical shape that accommodates the flow path member 13A having ultraviolet transmissivity inside, and is formed on the entire inner peripheral surface. The reflective film 19b serving as a reflection surface of the flow path 13a of the flow path member 13A reflects the ultraviolet rays transmitted through the flow path member 13A.

As the reflection film 19b, for example, a silicon dioxide film or an aluminum vapor deposition film is used. The connection member 19A is different from the connection member 19 in that it has a reflection film 19b. In addition, the flow path member 13A is different from the aforementioned flow path member 13 in that it is formed of a material having ultraviolet transmittance and does not have the reflection film 13b. Therefore, in the fourth embodiment, the ultraviolet rays emitted from the light source 16 are incident on the flow path 13a of the flow path member 13A, are transmitted through the flow path member 13A, and are reflected by the reflection film 19b of the connection member 19A. The reflected light of the ultraviolet rays reflected by the reflection film 19b is transmitted through the flow path member 13A and irradiated to the fluid flowing in the flow path 13a of the flow path member 13A.

Also in 4th Embodiment, by having the light source part 15, the utilization efficiency of the ultraviolet-ray which LED23 emits can be improved similarly to 1st Embodiment, Therefore, the ultraviolet-ray irradiation efficiency with respect to the fluid in the flow path 13a can be improved. In addition, the ultraviolet rays transmitted through the flow path member 13A are reflected into the flow path 13a by the reflection film 19b of the coupling member 19A, so that the ultraviolet irradiation efficiency to the fluid in the flow path 13a can be further improved.

(Fifth Embodiment) FIG. 12 is a cross-sectional view showing a main part of a fluid sterilizing apparatus according to a fifth embodiment. The fifth embodiment is different from the first embodiment in that the light sources 16 are respectively arranged on both sides in the longitudinal direction of the flow channel member 13 . As shown in FIG. 12 , the fluid sterilizing device 5 of the fifth embodiment includes a second connecting member 18A and a connecting member 19B. Inside the second connection member 18A, another light source 16 other than the light source 16 inside the first connection member 17 is provided. In addition, in the inside of the second connection member 18A, similarly to the first connection member 17 described above, along the periphery of the light source 16 is formed a flow as a third flow path that communicates with the upstream end of the flow path 13a. The channel 17a-1, the channel 17a-2, the channel 17b-1, the channel 17b-2. The flange parts 19a fixed to the 1st connection member 17 and the 2nd connection member 18A are respectively formed in the both end parts of the connection member 19B.

According to the fifth embodiment, since the second connection member 18A includes the light source portion 15 , the flow path can be further improved as compared with the first to fourth embodiments in which only the first connection member 17 includes the light source portion 15 . The bactericidal effect of the fluid in 13a. In addition, in the fifth embodiment, since the first connection member 17 and the second connection member 18A each have the light source portion 15, the utilization efficiency of the ultraviolet rays emitted from the LEDs 23 can be improved similarly to the first embodiment, so that the convection can be improved. The ultraviolet irradiation efficiency of the fluid in the passage 13a.

Although the embodiment of the present invention has been described, the embodiment is merely an example and is not intended to limit the scope of the present invention. The embodiment can be implemented in other various forms, and various omissions, substitutions, and changes can be made without departing from the gist of the present invention. The embodiments and modifications thereof are included in the scope and spirit of the present invention, and similarly, are included in the inventions described in the scope of claims and their equivalents.

1, 2, 3, 4, 5‧‧‧Fluid sterilization device 6‧‧‧Water supply tank 7‧‧‧Recovery tank 8‧‧‧Upstream side flow path member 9‧‧‧Downstream side flow path member 11‧‧‧Pump 12‧‧‧Flow rate adjustment mechanism 13, 13A‧‧‧Flow channel member 13a‧‧‧Flow channel (first channel) 13b, 19b‧‧‧Reflecting film (reflection surface) 15‧‧‧Light source section 16‧‧‧ Light source 17‧‧‧First connecting member (connecting member) 17a‧‧‧Upstream side flange 17b‧‧‧Downstream side flange 17a-1, 17a-2, 17b-1, 17b-2‧‧‧Flow path ( 2nd flow path) 17b-3‧‧‧Light source supporting part (supporting part) 17b-4‧‧‧Installing part 17b-5‧‧‧Support surface 17b-6‧‧‧Circular wall 18, 18A‧‧‧Second connection Members 19, 19A, 19B•••Connecting member 19a••• Flange portion 21••• Cover member 23•••LED (light-emitting element) 24•••Substrate 24a••• Mounting surface (mounting surface) 25 ‧‧‧O-ring 27‧‧‧Fastening member A, B‧‧‧Direction II‧‧‧Section L, L'‧‧‧Boundary line P‧‧‧Position θ‧‧‧Half-value angle θ'‧‧ ‧Maximum exit angle θ _O ‧‧‧obtuse angle

FIG. 1 is a schematic diagram showing the entire fluid sterilization apparatus according to the first embodiment. 2 is a cross-sectional view showing a main part of the fluid sterilizing device according to the first embodiment. 3 is an enlarged cross-sectional view showing a light source part included in the fluid sterilizing device according to the first embodiment. It is a schematic diagram for demonstrating the positional relationship of the light-emitting element which the fluid sterilizing apparatus of 1st Embodiment has, and the reflection surface of a reflection film. 5 is a cross-sectional view showing the direction in which the fluid flows in the flow channel member in the main part of the fluid sterilizing device according to the first embodiment. 6 is a cross-sectional view of an I-I cross-section perpendicular to the direction in which the fluid flows in the flow channel member, as viewed from the A direction, in the main part of the fluid sterilizing device according to the first embodiment. 7 is a cross-sectional view of an I-I cross-section perpendicular to the direction in which the fluid flows in the flow channel member, as viewed from the B direction, in the main part of the fluid sterilizing device according to the first embodiment. FIG. 8 is a schematic diagram showing a modification of the cover member included in the fluid sterilizing device according to the first embodiment. 9 is a cross-sectional view showing a main part of a fluid sterilizing device according to a second embodiment. 10 is a cross-sectional view showing a main part of a fluid sterilizing apparatus according to a third embodiment. 11 is a cross-sectional view showing a main part of a fluid sterilizing apparatus according to a fourth embodiment. 12 is a cross-sectional view showing a main part of a fluid sterilizing apparatus according to a fifth embodiment.

1‧‧‧Fluid sterilization device

13‧‧‧Flow Path Components

13a‧‧‧Flow path (1st flow path)

13b‧‧‧Reflecting film (reflecting surface)

15‧‧‧Light source

16‧‧‧Light source

17‧‧‧First connecting member (connecting member)

17a‧‧‧Upstream side flange

17b‧‧‧Downstream side flange

17a-1, 17a-2, 17b-1, 17b-2‧‧‧ flow path (2nd flow path)

17b-3‧‧‧Light source support part (support part)

17b-4‧‧‧Installation

19‧‧‧Connecting components

21‧‧‧Cover Components

23‧‧‧LED (Light-emitting element)

24‧‧‧Substrate

24a‧‧‧Installation surface (mounting surface)

25‧‧‧O-ring

A, B‧‧‧ direction

Section I-I‧‧‧

Claims (4)

A fluid sterilization device, comprising: a flow path member having a first flow path for flowing a fluid; a light source arranged to face a flow path cross section of the first flow path that intersects a flow direction of the fluid, and has a light-emitting element for irradiating ultraviolet rays into the first flow path; a connecting member connected to one end of the flow path member and provided with the light source, and has a connection member arranged around the light source and communicated with the first flow path. a second flow path of the first flow path, and a support portion for supporting the light source; and a cover member for protecting the light source from the fluid, the light source having a mounting surface on which the light-emitting element is mounted, In addition, the mounting surface is located in the first flow path, and the cover member transmits the ultraviolet rays advancing along the boundary line of the maximum emission angle of the light source when viewed from a direction along the mounting surface, The second flow path communicates with the first flow path, passes from the center of one surface side of the light source toward the outer peripheral side, passes through the outer peripheral side, and passes from the outer peripheral side to the place connected to the light source. The center of the opposite side opposite to the above-mentioned one side. The fluid sterilizing device according to claim 1, wherein the outer peripheral surface of the flow path member is provided with ultraviolet rays irradiated into the first flow path by the light-emitting element to reflect toward the first flow path The inner reflective surface, when viewed from the direction along the mounting surface, extends along the outer peripheral surface of the flow path member to the boundary line between the maximum emission angle of the light source and the first light source. The position where the inner surfaces of the 1 flow paths intersect is closer to the light source side. The fluid sterilizing device according to claim 1 or claim 2, wherein the second flow path has a connection path connected to one end of the first flow path, and the flow direction of the connection path is relative to the flow direction of the connection path. The flow direction of the first flow path is inclined at an obtuse angle. The fluid sterilizing device according to claim 1 or claim 2, wherein the second flow path has a connection path connected to one end of the first flow path, and the flow direction of the connection path is the same as the flow direction of the connection path. The flow directions of the first flow paths are the same.

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