JP6669910B1 - Water treatment equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water treatment device capable of realizing ultraviolet treatment of water to be treated and cooling of an ultraviolet LED by using a simple flow path. A water treatment device according to the present invention is a water treatment device that treats water to be treated with ultraviolet rays by using ultraviolet rays, and has a flow passage partitioning body in which a passage through which the water to be treated flows is formed. And an ultraviolet LED for irradiating the water to be treated flowing in the flow path with ultraviolet light, wherein the flow path partitioning body extends from the flow path upstream side to the flow path downstream side in the flow path. The ultraviolet LED is held in a holding region of a peripheral wall of the inner tube portion and is capable of irradiating the treated water flowing radially outside of the inner tube portion with ultraviolet rays. The inner pipe portion is closed at one end side of either the flow channel upstream side or the flow channel downstream side and is open at the other end side. [Selection diagram] Fig. 1

Description

  The present invention relates to a water treatment apparatus, and more particularly, to a water treatment apparatus that irradiates treated water with ultraviolet light.

  2. Description of the Related Art In recent years, a technique using ultraviolet irradiation has been studied as a technique for sterilizing water to be treated such as drinking water. The technology for sterilizing the water to be treated by using such ultraviolet irradiation includes a water treatment apparatus including a flow path through which the water to be treated flows, and a light source that irradiates the water to be treated flowing through the flow path with ultraviolet light. Used. Patent Document 1 discloses this type of water treatment apparatus.

  Patent Literature 1 discloses a water treatment apparatus in which the inside of a treatment tank is divided into a forward flow path that communicates with an inflow portion by a partition member and a return flow passage that communicates with an outflow portion. Further, in Patent Literature 1, an ultraviolet LED (Ultra Violet-Light Emitting Diode) for irradiating ultraviolet rays is provided on a partition member, and one of the flow paths irradiated with the ultraviolet light from the ultraviolet LED is an ultraviolet irradiation flow path, and the other is an ultraviolet irradiation flow path. Is disclosed as a cooling channel for cooling the ultraviolet LED.

JP 2014-161767 A

  According to the water treatment apparatus of Patent Literature 1, it is possible to perform ultraviolet treatment of the water to be treated by irradiating the water to be treated flowing in the ultraviolet irradiation flow path with ultraviolet rays from the ultraviolet LED. Furthermore, according to the water treatment device of Patent Literature 1, the ultraviolet LED can be cooled by the water to be treated flowing in the cooling channel. That is, in the water treatment device of Patent Document 1, it is not necessary to provide a passage for flowing the cooling fluid for the ultraviolet LED separately from the above-described passage.

  However, in the water treatment apparatus of Patent Literature 1, the entire flow path is partitioned and formed such that the ultraviolet irradiation flow path and the cooling flow path are turned back and connected. Therefore, the flow path in the water treatment device is easily complicated, and there is still room for improvement.

  An object of the present invention is to provide a water treatment apparatus capable of performing ultraviolet treatment of water to be treated and cooling of an ultraviolet LED using a simple flow path.

  A water treatment apparatus according to a first aspect of the present invention is a water treatment apparatus that performs ultraviolet treatment of water to be treated using ultraviolet rays, wherein a flow path section in which the flow path of the water to be treated is formed. A body, and an ultraviolet LED that irradiates ultraviolet light to the water to be treated flowing in the flow path, wherein the flow path partition body is in the flow path from the upstream side of the flow path to the downstream side of the flow path. An ultraviolet ray LED, which is held in a holding region of a peripheral wall of the inner pipe portion and can irradiate ultraviolet rays toward the water to be treated flowing radially outside the inner pipe portion. The inner pipe portion is closed at one end of the flow path upstream side and the flow path downstream side, and is open at the other end side.

  As one embodiment of the present invention, the inner pipe portion is closed on the upstream side of the flow path and is opened on the downstream side of the flow path.

  As one embodiment of the present invention, the flow path partition guides the water to be treated to the inside of the inner pipe section through an opening of the inner pipe section, on the downstream side of the flow path from the inner pipe section. A guide section is provided.

  As one embodiment of the present invention, the inner wall of the flow path partition body is located on the downstream side of the flow path from the inner pipe part, and faces the opening of the inner pipe part in the axial direction of the inner pipe part. And a protruding portion that protrudes toward the opening, and the guide portion is configured by the protruding portion.

  As one embodiment of the present invention, the inner wall of the flow path partition body includes a protruding portion that protrudes perpendicularly to an axial direction of the inner pipe section, on a downstream side of the flow path from the inner pipe section, The guide part is constituted by the protruding part.

  As one embodiment of the present invention, an end surface on the downstream side of the flow path of the inner pipe is inclined with respect to the axial direction of the inner pipe.

  As one embodiment of the present invention, the inner pipe portion is closed on the downstream side of the flow path and is opened on the upstream side of the flow path.

  ADVANTAGE OF THE INVENTION According to this invention, the water treatment apparatus which can implement | achieve ultraviolet treatment of the to-be-processed water and cooling of an ultraviolet LED using a simple flow path can be provided.

It is a schematic diagram showing an outline of a water treatment device as one embodiment of the present invention. It is sectional drawing of the water treatment apparatus shown in FIG. It is a figure which shows the double pipe member which comprises the double pipe part of the water treatment apparatus shown in FIG. FIG. 3 is a schematic diagram illustrating an outline of an ultraviolet LED held in a peripheral wall of an inner tube portion illustrated in FIG. 2. It is sectional drawing which shows the state which further enlarged the water treatment apparatus shown in FIG. It is a schematic diagram showing the outline of the water treatment equipment as the 1st modification of the water treatment equipment shown in Drawing 1. It is a schematic diagram showing the outline of the water treatment equipment as the 2nd modification of the water treatment equipment shown in Drawing 1. It is a schematic diagram showing the outline of the water treatment equipment as the 3rd modification of the water treatment equipment shown in Drawing 1. It is a schematic diagram showing the outline of the water treatment equipment as the 4th modification of the water treatment equipment shown in Drawing 1. It is a schematic diagram showing the outline of the water treatment equipment as the 5th modification of the water treatment equipment shown in Drawing 1.

  Hereinafter, embodiments of a water treatment apparatus according to the present invention will be described with reference to the drawings. In the drawings, common members / parts are denoted by the same reference numerals.

  FIG. 1 is a schematic diagram showing an outline of a water treatment apparatus 1 as one embodiment of the water treatment apparatus according to the present invention. As shown in FIG. 1, the water treatment device 1 includes a flow path partition 10 and an ultraviolet LED 20. The water treatment apparatus 1 can treat the water to be treated with ultraviolet rays using ultraviolet rays. Hereinafter, for convenience of explanation, both the untreated water before being subjected to the ultraviolet treatment by the water treatment apparatus 1 and the treated water after being subjected to the ultraviolet treatment by the water treatment apparatus 1 are simply referred to as “covered” unless otherwise specified. Treated water ". In FIG. 1, the flow of the water to be treated is indicated by a dashed arrow.

  As shown in FIG. 1, a flow passage 10 a through which water to be treated flows is formed inside the flow passage partitioning body 10. The ultraviolet LED 20 irradiates the water to be treated flowing in the flow path 10a with ultraviolet light. Thereby, the water to be treated flowing in the flow path 10a can be subjected to the ultraviolet treatment.

  As shown in FIG. 1, the flow path partition body 10 includes an inner pipe part 30. The inner pipe portion 30 extends from the upstream side of the flow path to the downstream side of the flow path in the flow path 10a. Hereinafter, for convenience of description, the direction from the upstream side of the flow path to the downstream side of the flow path of the flow path 10a may be referred to as “water supply direction A”.

  As shown in FIG. 1, the ultraviolet LED 20 is held in a holding area GA on the peripheral wall of the inner tube 30. Further, the ultraviolet LED 20 can irradiate ultraviolet light toward the water to be treated flowing outside the radial direction B of the inner tube portion 30. Hereinafter, for convenience of explanation, a portion of the flow path 10a outside the radial direction B of the inner pipe portion 30 is referred to as an "annular processing space 16a".

  The inner pipe part 30 is closed on the upstream side of the flow path. On the other hand, the inner pipe part 30 is open on the downstream side of the flow path. More specifically, the inner tube space 30a formed inside the inner tube portion 30 is closed on the upstream side of the flow path with respect to the holding area GA. On the other hand, the inner pipe space 30a is open to the holding area GA on the downstream side of the flow path. That is, the end of the inner pipe portion 30 on the downstream side of the flow path is an open end in which the open port 31 is formed. The opening 31 is formed by an annular end face on the downstream side of the flow path of the inner pipe part 30. The size of the opening 31 is the same as the cross-sectional area of the inner tube space 30 a orthogonal to the axial direction C of the inner tube portion 30. That is, the end of the inner pipe space 30a on the downstream side of the flow path is not partially closed. On the other hand, a bottom plate portion 32 that closes the inner tube space 30a is provided at an end of the inner tube portion 30 of the present embodiment on the upstream side of the flow path. The end of the inner pipe space 30 a on the upstream side of the flow path is completely closed by the bottom plate 32.

  By providing such an inner tube portion 30 in the flow path 10a, it is possible to perform the ultraviolet treatment of the water to be treated by the ultraviolet LED 20 and the cooling of the ultraviolet LED 20 by the water to be treated.

  With reference to FIG. 1, cooling of the ultraviolet LED 20 by the water to be treated will be described. By arranging the above-described inner tube portion 30 in the flow passage 10a, the inner tube space 30a in the inner tube portion 30 is covered by utilizing the flow velocity difference and pressure difference of the water to be treated generated based on Bernoulli's theorem. The treated water can be circulated. By the water to be circulated in the inner tube space 30a, the ultraviolet LED 20 held in the inner tube portion 30 can be cooled via the inner tube portion 30.

  More specifically, as shown in FIG. 1, by arranging the above-described inner tube portion 30 in the flow path 10a, based on Bernoulli's theorem, the flow rate of the water to be treated at the position of the annular treatment space 16a and The pressure can be higher than the flow velocity and pressure of the water to be treated at a position downstream of the annular processing space 16a on the flow path side. Therefore, the water to be treated near the inner peripheral surface in the inner pipe portion 30 is pulled by the water to be treated immediately after passing through the annular treatment space 16a, and moves from the opening 31 to the downstream side of the flow path. In this manner, a flow of the water to be treated which flows out of the inner pipe space 30a through the opening 31 in the vicinity of the inner peripheral surface in the inner pipe portion 30 (see the dashed arrow AR1 in FIG. 1) is formed. Further, by this flow being formed, a flow of the water to be treated flowing into the inner pipe space 30a from the central region of the opening 31 (see the dashed arrow AR2 in FIG. 1) is also formed. That is, it flows into the inner tube space 30a from the central region of the opening 31 of the inner tube 30, flows along the inner wall of the inner tube 30, and flows through the opening 31 from near the inner peripheral surface of the inner tube 30. A series of circulation paths of the water to be treated flowing out of the pipe space 30a is formed. By circulating the water to be treated in this manner, low-temperature water is always supplied into the inner pipe portion 30 and the cooling effect is maintained. Therefore, the ultraviolet LED 20 held in the inner pipe section 30 can be cooled via the inner pipe section 30 by the water to be treated flowing in the circulation path in the inner pipe space 30a.

  In the present embodiment, the flow rate of the water to be treated in the flow path 10a is designed to be 0.5 m / sec to 3.0 m / sec, and it is assumed that the Reynolds number is large. On the other hand, when the flow velocity of the water to be treated in the flow path 10a is very small (for example, 0.1 m / sec or the like) and the Reynolds number is also very small (for example, less than 2500), the inner pipe section 30 The circulation path is different from the circulation path shown in FIG. Specifically, the water to be treated enters the inner pipe space 30 a from the opening 31 at a position near the inner peripheral surface of the inner pipe 30, flows along the inner wall of the inner pipe 30, and passes through the central region of the opening 31. It flows out of the inner tube space 30a. In other words, the water to be treated circulates in the inner pipe 30 in a direction opposite to the circulation path shown in FIG. Therefore, a circulation path in the inner pipe 30 of the water to be treated can be formed regardless of the flow velocity of the water to be treated. Therefore, regardless of the flow rate of the water to be treated, the ultraviolet LED 20 can be cooled by the water to be treated in the inner pipe portion 30.

  The inner tube space 30a of the inner tube portion 30 of the present embodiment is closed on the upstream side of the flow path with respect to the holding area GA, and is opened on the downstream side of the flow path with respect to the holding area GA. It is not limited to this configuration. Although details will be described later, the inner pipe section 30 may be closed at the downstream side of the flow path and open at the upstream side of the flow path (see FIG. 10). What is necessary is that it is closed at one end of the flow path downstream side and is open at the other end side.

  Hereinafter, details of each member of the water treatment apparatus 1 of the present embodiment will be described. FIG. 2 is a sectional view of the water treatment device 1. FIG. 3 is a diagram showing a double pipe member 400 constituting the double pipe section 16 of the water treatment apparatus 1.

[Flow path partition 10]
As shown in FIG. 2, the flow path partitioning body 10 of the present embodiment includes a substantially cylindrical main body 11 and an axial direction of the main body 11 (in the present embodiment, the same direction as the axial direction C of the inner tube 30). Hereinafter, referred to as “axial direction C”.) A cylindrical inlet port 12 protruding from the outer peripheral surface toward the outside in the radial direction B at one end side, and the other end side in the axial direction C of the main body section 11. And a cylindrical outlet 13 protruding outward from the outer peripheral surface in the radial direction B. The flow path 10 a defined by the flow path partition body 10 of the present embodiment includes a main body flow path 11 a in the main body 11, an inlet 12 a in the inlet 12, an outlet 13 a in the outlet 13, It consists of. In FIG. 2, the flow of the water to be treated is indicated by broken-line arrows only at the positions of the channel opening 12 and the outlet 13.

  Although details will be described later, the inflow port portion 12 may be configured to protrude outward (left side in FIG. 2) in the axial direction C from a bottom surface located at one end side in the axial direction C of the main body portion 11 (FIG. 6). reference). As will be described later in detail, the outlet 13 may be configured to protrude outward (to the right in FIG. 2) in the axial direction C from a bottom surface located at the other end of the main body 11 in the axial direction C. (See FIG. 6).

  The main body 11 includes an inflow portion 14, an outflow portion 15, and a double pipe portion 16.

  The inflow portion 14 is formed with an inflow space 14a of the main body channel 11a. The inflow portion 14 includes a cylindrical inflow pipe portion 14b and an annular flange portion 14c. The inflow space 14a has one end on the upstream side of the flow path closed and the other end on the downstream side of the flow path open. That is, the downstream end of the inflow pipe portion 14b is an open end. The annular flange portion 14c protrudes outward in the radial direction B from the other end of the inflow pipe portion 14b on the downstream side of the flow path.

  The above-described cylindrical inflow port 12 protrudes from the outer peripheral surface of the inflow pipe section 14b. The water to be treated flows into the inflow space 14a in the inflow pipe portion 14b from outside the main body portion 11 through the inflow port 12a of the inflow port portion 12.

  The outflow portion 15 has an outflow space 15a for the main body flow path 11a. The outflow portion 15 includes a cylindrical outflow pipe portion 15b and an annular flange portion 15c. One end of the outflow space 15a on the upstream side of the flow path is open, and the other end on the downstream side of the flow path is closed. That is, the end of the outflow pipe portion 15b on the upstream side of the flow path is an open end. The annular flange portion 15c protrudes outward in the radial direction B from one end of the outflow pipe portion 15b on the upstream side of the flow path.

  The cylindrical outlet 13 protrudes from the outer peripheral surface of the outlet pipe 15b. The water to be treated flows out of the main body 11 from the outflow space 15 a through the outlet 13 a of the outlet 13.

  The double pipe section 16 is located between the inflow section 14 and the outflow section 15 described above. Specifically, the double pipe section 16 is continuous with the inflow section 14 at one end on the upstream side of the flow path. The double pipe section 16 is connected to the outflow section 15 at the other end on the downstream side of the flow path.

  More specifically, the double pipe section 16 includes a cylindrical pipe section as the inner pipe section 30 and a cylindrical pipe section as the outer pipe section 40 surrounding the outside of the inner pipe section 30 in the radial direction B. , An upstream annular flange portion 16b, a downstream annular flange portion 16c, and a connecting portion 16d.

  The inner pipe part 30 extends in the water supply direction A as the axial direction of the outer pipe part 40 in the outer pipe part 40. The central axis of the inner tube part 30 substantially matches the central axis of the outer tube part 40. Therefore, the axial direction of the outer tube portion 40 of the present embodiment is the same as the axial direction C of the inner tube portion 30. In other words, the inner tube portion 30 is arranged concentrically so that the center axis of the inner tube portion 30 substantially coincides with that of the outer tube portion 40. The position of the inner tube portion 30 in the outer tube portion 40 is maintained by a connecting portion 16d described later. The above-described annular processing space 16a is defined between the inner tube portion 30 and the outer tube portion 40.

  As described above, the inner tube space 30a formed inside the inner tube portion 30 has one end on the upstream side of the flow path closed and the other end on the downstream side of the flow path opened.

  As described above, the ultraviolet LED 20 is held on the peripheral wall of the inner tube portion 30. Details of the ultraviolet LED 20 will be described later.

  The outer tube portion 40 surrounds the outer side of the inner tube portion 30 in the radial direction B as described above. An annular processing space 16a is formed between the outer tube 40 and the inner tube 30. One end of the annular processing space 16a on the upstream side of the flow path and the other end on the downstream side of the flow path are open.

  As shown in FIG. 2, the inflow space 14 a of the inflow portion 14 communicates with the annular processing space 16 a of the double pipe portion 16. Further, as shown in FIG. 2, the outflow space 15 a of the outflow portion 15 communicates with the annular processing space 16 a of the double pipe portion 16. Therefore, the water to be treated that has flowed into the inflow port 12a from outside the main body 11 passes through the inflow space 14a, the annular processing space 16a, and the outflow space 15a in this order, and flows out of the outflow port 13a to the outside of the main body 11. When the water to be treated passes through the annular treatment space 16a, it is sterilized by ultraviolet irradiation from the ultraviolet LED 20, and is subjected to ultraviolet treatment from untreated water to treated water.

  The connecting portion 16 d connects the outer wall of the inner tube 30 and the inner wall of the outer tube 40. As shown in FIG. 3, the connecting portion 16 d of the present embodiment includes a plurality of spoke portions radially extending outward in the radial direction B from different positions in the circumferential direction of the outer wall of the inner tube portion 30. Therefore, the annular processing space 16a communicates from one end on the upstream side of the flow path to the other end on the downstream side of the flow path through a gap between the spoke portions adjacent in the circumferential direction.

  Note that the connection portion 16d is not limited to the configuration of the present embodiment. The connecting portion 16d can hold a position of the inner pipe portion 30 in the outer pipe portion 40, and can communicate with the water to be treated in the annular processing space 16a (for example, between the spoke portions in the present embodiment). The configuration is not particularly limited as long as the configuration defines the gap.

  In addition, a signal line such as a conductor extending from the ultraviolet LED 20 held on the peripheral wall of the inner tube portion 30 to the outside of the flow path partition body 10 is connected to the outside of the flow path partition body 10 through, for example, a plurality of spokes serving as the connection part 16d. Can be pulled out.

  The upstream annular flange portion 16b protrudes outward in the radial direction B from one end of the outer pipe portion 40 on the upstream side of the flow path. The downstream annular flange portion 16c protrudes outward in the radial direction B from the other end of the outer pipe portion 40 on the downstream side of the flow path.

  Here, the flow channel partitioning body 10 of the present embodiment includes a flow channel inlet member 200 forming the inflow portion 12 and the inflow portion 14, a flow channel outlet member 300 forming the outflow portion 13 and the outflow portion 15, It is formed by connecting the double pipe member 400 constituting the double pipe section 16.

  Specifically, the above-described upstream annular flange portion 16b of the double pipe member 400 is joined to the above-described annular flange portion 14c of the flow path inlet member 200 using joining members such as bolts, nuts, and lock pins. . The superimposed upstream annular flange portion 16b and annular flange portion 14c are joined at different positions in the circumferential direction using joining members such as bolts. More specifically, a plurality of bolt insertion holes are formed in each of the upstream annular flange portion 16b and the annular flange portion 14c of the present embodiment. The plurality of bolt insertion holes are arranged at predetermined intervals in the circumferential direction. Further, the plurality of bolt insertion holes are formed over the entire area in the circumferential direction. The upstream annular flange portion 16b and the annular flange portion 14c are overlapped with each other so that the bolt insertion holes communicate with each other, and are joined by using the bolt insertion nuts by using the bolt insertion holes. As a result, the inflow space 14a and the annular processing space 16a of the flow path inlet member 200 and the double pipe member 400 are connected in a liquid-tight state. Note that the same applies to the joining of the above-mentioned downstream annular flange portion 16c of the double pipe member 400 and the above-mentioned annular flange portion 15c of the flow path outlet member 300. Thus, the outflow space 15a and the annular processing space 16a are connected to the flow path outlet member 300 and the double pipe member 400 in a liquid-tight state.

  However, in the flow path partition body 10, the inflow part 14, the outflow part 15, and the double pipe part 16 may be integrally formed inseparably. However, like the flow channel partitioning body 10 of the present embodiment, the flow channel inlet member 200 forming the inflow portion 14, the flow channel outlet member 300 forming the outflow portion 15, and the two flow channels forming the double pipe portion 16 are formed. The heavy pipe member 400 is preferably configured to be detachable from each other. In this way, for example, when the ultraviolet LED 20 is out of order, the double tube member 400 is attached to and detached from the flow path entrance member 200 and the flow path exit member 300, so that the ultraviolet LED 20 held by the inner tube portion 30 is removed. Cleaning, replacement, and the like can be easily performed. That is, the efficiency of the maintenance and inspection work of the water treatment device 1 can be improved.

  The inner tube portion 30 of the double tube portion 16 is made of, for example, a metal having high thermal conductivity such as stainless steel, aluminum, and copper. By doing so, the cooling efficiency of the ultraviolet LED 20 can be increased. Further, the portion of the flow path partition body 10 other than the above-described inner tube portion 30 can be made of, for example, a metal such as stainless steel, aluminum, or copper, similarly to the inner tube portion 30.

  As an example, when the inner diameter ID1 of the outer tube portion 40 is set to 100 mm to 500 mm, the inner diameter ID2 of the inner tube portion 30 is set to 40 mm to 200 mm, and the axial length L of the inner tube space 30a is set to 40 mm to 600 mm. Is preferred. As another example, when the inner diameter ID1 of the outer tube portion 40 is 500 mm to 1000 mm, the inner diameter ID2 of the inner tube portion 30 is 200 mm to 600 mm, and the axial length L of the inner tube space 30a is 200 mm to 1200 mm. It is preferable to set within the range. By setting the dimensions of each part as in these two examples, the above-described circulation path of the water to be treated in the inner pipe part 30 can be easily formed. In particular, the dimensional relationship is preferably such that L / ID2 is 0.1 or more, more preferably 1 or more and less than 10. Further, it is preferable that ID2 / ID1 has a dimensional relationship satisfying 0.3 ≦ ID2 / ID1 ≦ 0.8, and more preferable that the dimensional relationship satisfies 0.4 ≦ ID2 / ID1 ≦ 0.7. By doing so, the water to be treated easily flows into the inner pipe portion 30 and the water to be treated easily reaches the end of the inner pipe space 30a on the upstream side of the flow path. This makes it easier to form a circulation path in which the water to be treated hardly stays in the inner pipe portion 30.

  Further, it is preferable to set the ratio of the volume in the inner tube portion 30 to the entire volume in the main body portion 11 of the flow path partitioning body 0.2 to 0.8. By doing so, the above-described circulation path of the water to be treated in the inner pipe portion 30 can be formed more easily.

[UV LED 20]
FIG. 4 is a schematic diagram showing an outline of the ultraviolet LED 20 held on the peripheral wall of the inner tube portion 30. As shown in FIG. 4, the ultraviolet LED 20 includes an LED element 21 as an ultraviolet light source, an LED substrate 22 supporting the LED element 21, and a glass covering material 23 covering the LED element 21 and the LED substrate 22. .

  The center wavelength or the peak wavelength of the LED element 21 can be appropriately set according to, for example, the sensitivity of the microorganism to be treated. The LED element 21 of the present embodiment outputs deep ultraviolet light having a center wavelength or a peak wavelength within a range of about 200 nm to 350 nm. In particular, it is preferable that the LED element 21 outputs ultraviolet light in the vicinity of 260 nm to 300 nm, which is a wavelength having high sterilization efficiency. As such an LED element 21, for example, a configuration using aluminum gallium nitride (AlGaN) is known.

  The LED board 22 has an electric circuit. The LED element 21 is electrically connected to an electric circuit of the LED board 22. The ultraviolet LED 20 is held on the peripheral wall of the inner tube 30 by attaching the LED substrate 22 to the outer peripheral surface of the inner tube 30.

  Further, the electric circuit of the LED board 22 is electrically connected to the signal line 50. As shown in FIG. 4, the signal line 50 is wired so as to be drawn from the outer peripheral surface side to the inner peripheral surface side of the inner pipe part 30 through a through hole formed in the peripheral wall of the inner pipe part 30. The signal line 50 is wired along the inner peripheral surface of the inner tube portion 30 and is drawn out of the flow path partition 10 through the above-described connecting portion 16d (see FIG. 3). Note that the outer peripheral surface of the signal line 50 is formed of an insulating material that covers the outer periphery of the internal conductor.

  As shown in FIG. 3, a plurality of ultraviolet LEDs 20 are mounted on the outer peripheral surface of the inner tube portion 30. Specifically, in the present embodiment, a plurality of ultraviolet LEDs 20 are attached to different positions in the circumferential direction of the inner tube portion 30. In the present embodiment, a plurality of ultraviolet LEDs 20 are mounted at different positions in the axial direction C of the inner tube portion 30. The number of UV LEDs 20 to be mounted and the mounting position are determined by the performance of the UV LEDs 20, the type of microorganisms to be treated such as Cryptosporidium and pathogenic bacteria contained in the water to be treated, the flow rate of the water to be treated, and the flow path of the flow path section 10. It can be appropriately designed according to the configuration and the like. FIG. 4 shows a configuration in which one ultraviolet LED 20 includes one LED element 21, but one ultraviolet LED 20 may include a plurality of LED elements 21. In such a case, for example, the plurality of LED elements 21 are supported on the LED substrate 22, and the glass coating material 23 is coated so as to cover the plurality of LED elements 21.

  As described above, in the water treatment apparatus 1 of the present embodiment, the water to be treated is supplied from the outside of the flow path partition body 10 to the inflow port 12a, the inflow space 14a, the annular treatment space 16a, the outflow space 15a, and the outflow port 13a. It proceeds in order and is discharged to the outside of the flow path partitioning body 10. The water to be treated is subjected to ultraviolet treatment by the ultraviolet LED 20 when passing through the annular treatment space 16a in this series of flows. The above-mentioned circulation path (see FIG. 1) of the water to be treated in the inner pipe space 30a of the inner pipe portion 30 is formed by the action of the water to be treated that has passed through the annular treatment space 16a. Therefore, the inner tube portion 30 is constantly cooled by the water to be circulated therein, and the ultraviolet LED 20 held in the inner tube portion 30 is cooled through the inner tube portion 30.

  Next, an increase in the size of the water treatment apparatus 1 will be described. FIG. 5 is a sectional view showing a state where the water treatment apparatus 1 shown in FIG. 2 is further enlarged. In FIG. 5, the flow of the water to be treated is indicated only by the positions of the flow channel opening 12 and the outlet 13 by broken arrows. As described above, the flow channel partitioning body 10 shown in FIG. 2 includes a flow channel inlet member 200 forming the inflow portion 12 and the inflow portion 14 and a flow channel outlet member 300 forming the outflow portion 13 and the outflow portion 15 And a double pipe member 400 constituting the double pipe section 16 are connected to each other, but as shown in FIG. The body 10 can be further enlarged. Thereby, the annular processing space 16a of the double pipe member 400 can be extended, and the ultraviolet processing capacity can be further increased.

  The flow path partition body 10 of the water treatment apparatus 1 shown in FIG. 5 includes a flow path inlet member 200, a flow path outlet member 300, a double pipe member 400, and a double pipe additional member 500. Since the flow path inlet member 200, the flow path outlet member 300, and the double pipe member 400 are the same as those in FIG. 2, the description is omitted here.

  The double pipe extension member 500 includes a cylindrical pipe section as the extension inner pipe section 530, and a cylindrical pipe section as the extension outer pipe section 540 surrounding the outside of the extension inner pipe section 530 in the radial direction B. An upstream annular flange portion 516b, a downstream annular flange portion 516c, and a connecting portion (not shown) are provided. The additional outer tube portion 540, the upstream annular flange portion 516b, the downstream annular flange portion 516c, and the connection portion are respectively the outer tube portion 40, the upstream annular flange portion 16b, the downstream annular flange portion 16c, and the outer tubular portion 40 of the double pipe member 400. The description is omitted here because it is the same as each of the connecting portions 16d.

  The additional inner pipe section 530 of the double pipe additional member 500 is located upstream of the flow path of the additional inner pipe space 530a formed inside the additional inner pipe section 530, as compared with the inner pipe section 30 of the double pipe member 400. The configuration differs in that the side end is not closed. That is, both ends of the additional inner pipe section 530 on the upstream side and the downstream side of the flow path are open ends. In addition, the additional inner tube part 530 holds the ultraviolet LED 20 similarly to the inner tube part 30.

  As shown in FIG. 5, by connecting the double pipe additional member 500 to the downstream side of the flow path of the double pipe member 400, the open end of the inner pipe portion 30 of the double pipe member 400 on the downstream side of the flow path is provided. The open end of the additional inner pipe portion 530 of the double pipe additional member 500 on the upstream side of the flow path can be connected. Thereby, the inner pipe space 30a in the inner pipe part 30 of the double pipe member 400 and the additional inner pipe space 530a in the additional inner pipe part 530 of the double pipe additional member 500 can be communicated.

  The inner pipe space 30a and the additional inner pipe space 530a are formed, for example, by interposing a sealing member such as an elastic body between the open end of the inner pipe section 30 and the open end of the additional inner pipe section 530, thereby providing a liquid. Communicate closely.

  Further, as shown in FIG. 5, by connecting a double pipe extension member 500 to the downstream side of the flow path of the double pipe member 400, the double pipe member 400 is connected to the downstream side of the flow path of the annular processing space 16a. The heavy pipe extension member 500 can communicate with the upstream side of the flow path of the additional annular processing space 516a. In other words, the annular processing space 16a of the double pipe member 400 can be extended by the additional annular processing space 516a of the double pipe extension member 500. Therefore, the region where the water to be treated is subjected to ultraviolet treatment by the ultraviolet LED 20 becomes longer, and the ultraviolet treatment capability of the water treatment device 1 is further enhanced.

  The double-pipe member 400 and the double-pipe extension member 500 are connected using an annular flange portion, similarly to the connection configuration of the double-pipe member 400 and the flow path inlet member 200 described above. With such a connection configuration, the double pipe addition member 500 can be easily added.

  As described above, by connecting the double pipe extension member 500 to the downstream side of the flow path of the double pipe member 400, the flow path partition body 10 can be further enlarged, and the ultraviolet treatment capacity of the water treatment apparatus 1 can be further increased. Can be.

  In the example shown in FIG. 5, one double pipe addition member 500 is added between the flow path outlet member 300 and the double pipe member 400, but an arbitrary number of two or more double pipe addition members is provided. 500 may be added. In this way, by allowing an arbitrary number of double pipe addition members 500 to be added, the positions of the flow path inlet member 200 and the flow path exit member 300 in the water treatment apparatus 1 are not fixed, and the double pipe expansion member 500 is added. The position may correspond to the number of additional members 500. That is, the degree of freedom in designing the positions of the inflow port 12a and the outflow port 13a can be improved. Conversely, even when the positions of the flow path inlet member 200 and the flow path outlet member 300 are fixed, the flow path inlet member 200 and the flow path The flow path partition body 10 adjusted to the fixed position of the outlet member 300 can be realized.

  Next, a modified example of the above-described water treatment apparatus 1 will be described. FIG. 6 is a schematic diagram illustrating an outline of a water treatment apparatus 100a as a first modification of the above-described water treatment apparatus 1. In FIG. 6, the flow of the water to be treated is indicated by a broken arrow. The water treatment apparatus 100a shown in FIG. 6 differs from the water treatment apparatus 1 shown in FIG. 1 in the positions of the inflow port 12 and the outflow port 13, and has the same other configuration. Therefore, only the differences between the water treatment apparatus 100a and the water treatment apparatus 1 shown in FIG. 1 will be described here, and the description of the common configuration will be omitted.

  As shown in FIG. 6, the inflow port portion 12 of the water treatment device 100a protrudes from the bottom surface located on one end side in the axial direction C of the main body portion 11 toward the outside (left side in FIG. 6) in the axial direction C. . As shown in FIG. 6, the outlet 13 of the water treatment device 100 a is arranged from the bottom surface located on the other end side in the axial direction C of the main body 11 to the outside in the axial direction C (to the right in FIG. 6). It is protruding.

  In the water treatment apparatus 1 shown in FIG. 1, the inflow port 12 and the outflow port 13 protrude outward in the radial direction B from the outer peripheral surface of the substantially cylindrical main body 11 of the flow path partitioning body 10. The flow velocity and pressure of the water to be treated in the treatment space 16a vary depending on the position in the circumferential direction. Specifically, in the water treatment apparatus 1 shown in FIG. 1, the opposite side (the lower side in FIG. 1) facing the circumferential position where the inflow port 12 and the outflow port 13 are provided in the radial direction B. Therefore, the flow velocity and pressure of the water to be treated in the annular treatment space 16a tend to increase.

  On the other hand, by disposing the inflow port 12 and the outflow port 13 at the positions shown in FIG. 6, the flow velocity difference and the pressure difference of the water to be treated due to the circumferential position of the annular treatment space 16a can be reduced. Therefore, it is possible to reduce the difference in the ultraviolet processing ability depending on the circumferential position of the annular processing space 16a.

  FIG. 7 is a schematic diagram showing an outline of a water treatment device 100b as a second modification of the above-described water treatment device 1. In FIG. 7, the flow of the water to be treated is indicated by a dashed arrow. The water treatment apparatus 100b shown in FIG. 7 differs from the water treatment apparatus 1 shown in FIG. Therefore, only the differences between the water treatment device 100b and the water treatment device 1 shown in FIG. 1 will be described here, and the description of the common configuration will be omitted.

  The flow channel section 10 shown in FIG. 7 includes a guide portion 60 on the downstream side of the flow channel from the inner tube portion 30. The guide section 60 guides the water to be treated into the inner pipe space 30a through the opening 31 of the inner pipe section 30.

  More specifically, the inner wall that partitions the flow path 10a of the flow path partition body 10 shown in FIG. As shown in FIG. 7, the protruding portion 60 a is provided at a position downstream of the inner pipe 30 and downstream of the flow path, facing the opening 31 of the inner pipe 30 in the axial direction C of the inner pipe 30. I have. That is, the protruding portion 60a is provided on a portion of the inner wall of the flow path partition 10 that is located on the downstream side of the flow path in the axial direction C of the main body 11 of the flow path partition 10. The protruding portion 60 a protrudes from the inner wall of the flow path partitioning body 10 toward the opening 31. The protruding portion 60a can be, for example, a conical or frustum-shaped projection that becomes thinner toward the top 60a1 on the opening 31 side. In the example shown in FIG. 7, the guide part 60 is configured by a protruding part 60a. By providing such a guide portion 60, as shown in FIG. 7, the water to be treated passing through the annular treatment space 16a can be more efficiently guided into the inner pipe portion 30. Therefore, the cooling efficiency of the ultraviolet LED 20 held in the inner tube portion 30 can be further increased.

  In FIG. 7, the guide portion 60 is configured by the above-described protruding portion 60 a. However, if the configuration guides the flow of the water to be treated and guides the water to be treated into the inner pipe portion 30, the configuration is particularly Not limited. Therefore, the guide part 60 is not limited to a conical or frustum-shaped projection. Further, the guide section 60 may be provided at another position on the inner wall of the flow path section 10. Therefore, the guide part 60 may be, for example, a protruding part that protrudes perpendicularly to the axial direction C of the inner pipe part 30 on the downstream side of the flow path from the inner pipe part 30. Further, a plurality of guide portions 60 may be provided on the inner wall of the flow path partition body 10. Further, the guide portion 60 may be configured by a separate member attached to the inside of the flow channel 10a of the flow channel partitioning member 10.

  FIG. 8 is a schematic diagram showing an outline of a water treatment device 100c as a third modification of the above-described water treatment device 1. In FIG. 8, the flow of the water to be treated is indicated by broken arrows only at the positions of the flow path opening 12 and the outlet 13. The water treatment apparatus 100c shown in FIG. 8 differs from the water treatment apparatus 1 shown in FIG. 1 in the number of the inner pipe sections 30 and the presence or absence of the guide section 60. As shown in FIG. 8, a plurality of inner pipe portions 30 may be arranged in the flow channel 10 a in the flow channel partition body 10. The plurality of inner pipe portions 30 are arranged apart from each other in the water supply direction A. In FIG. 8, the three inner pipe portions 30 are arranged in a line in the axial direction C so that the central axes of the three inner pipe portions 30 coincide.

  In addition, as shown in FIG. 8, a projecting portion 60 a as a guide portion 60 may be provided on the bottom surface of the inner pipe portion 30 on the upstream side of the flow path. In this way, the water to be treated can be guided to the inner pipe space 30a of another inner pipe part 30 located on the upstream side of the flow path from the inner pipe part 30 provided with the guide part 60.

  FIG. 9 is a schematic diagram illustrating an outline of a water treatment device 100d as a fourth modification of the above-described water treatment device 1. In FIG. 9, the flow of the water to be treated is indicated by a broken arrow. The water treatment device 100d shown in FIG. 9 differs from the water treatment device 1 shown in FIG. 1 in the shape of the open end of the inner pipe portion 30 on the downstream side of the flow path, and has the same other configuration. Therefore, only the differences between the water treatment device 100d and the water treatment device 1 shown in FIG. 1 will be described here, and the description of the common configuration will be omitted.

  The downstream end surface of the inner pipe 30 shown in FIG. 9 is inclined with respect to the axial direction C of the inner pipe 30. The opening 31 is formed by this inclined end surface. In other words, the annular end face on the downstream side of the flow path of the inner pipe part 30 shown in FIG. 9 is configured by an annular plane inclined in the axial direction C.

  With such a configuration, a flow velocity difference and a pressure difference of the water to be treated can be generated between the distal end 33 side and the base end 34 side of the annular plane forming the open end of the inner pipe portion 30. Therefore, the circulation of the water to be treated in the inner pipe portion 30 based on Bernoulli's theorem can be further promoted.

  As shown in FIG. 9, the circumferential position where the distal end 33 of the open end of the inner tube portion 30 is located is the circumferential position where the inflow port 12 and the outflow port 13 are provided and the radial direction B. Facing each other. In the water treatment apparatus 100d shown in FIG. 9, the flow velocity and pressure of the water to be treated passing through the annular treatment space 16a are determined in the circumferential direction where the inflow port 12 and the outflow port 13 are provided. It is higher at the circumferential position where the distal end 33 of the open end of the inner tube part 30 is located than at the circumferential position where the base end 34 of the open end is located). Therefore, in the water treatment apparatus 100d shown in FIG. 9, the number of the ultraviolet LEDs 20 attached to the peripheral wall of the inner pipe 30 shown in FIG. In the direction region, the number is larger than a predetermined circumferential region including the circumferential position of the base end 34 of the open end of the inner tube portion 30. Thereby, it is possible to reduce the variation in the ultraviolet processing ability based on the flow rate difference of the water to be treated depending on the circumferential position of the annular processing space 16a.

  FIG. 10 is a cross-sectional view of a water treatment device 100e as a fifth modification of the above-described water treatment device 1. In FIG. 10, the flow of the water to be treated is indicated by broken arrows only at the positions of the flow path opening 12 and the outlet 13. The water treatment device 100e shown in FIG. 10 differs from the water treatment device 1 shown in FIGS. 1, 2 and the like in the position of the open end of the inner pipe portion 30, and has the same other configuration. Therefore, here, only the differences between the water treatment apparatus 100e and the water treatment apparatus 1 shown in FIGS. 1, 2 and the like will be described, and the description of the common configuration will be omitted.

  The inner pipe part 30 shown in FIG. 10 is closed on the downstream side of the flow path. On the other hand, the inner pipe section 30 shown in FIG. 10 is open on the upstream side of the flow path. More specifically, the inner tube space 30a formed inside the inner tube portion 30 shown in FIG. 10 is closed on the downstream side of the flow path with respect to the holding area GA. On the other hand, the inner tube space 30a shown in FIG. 10 is opened on the flow path upstream side with respect to the holding area GA. That is, the end of the inner pipe portion 30 on the upstream side of the flow channel shown in FIG. The opening 31 is formed by an annular end face on the upstream side of the flow path of the inner pipe part 30. The size of the opening 31 is the same as the cross-sectional area of the inner tube space 30 a orthogonal to the axial direction C of the inner tube portion 30. That is, the end of the inner pipe space 30a on the upstream side of the flow path is not partially closed. On the other hand, a bottom plate portion 32 for closing the inner tube space 30a is provided at an end of the inner tube portion 30 shown in FIG. 10 on the downstream side of the flow path. The downstream end of the inner pipe space 30 a on the flow path side is completely closed by the bottom plate 32.

  When the inner pipe portion 30 is formed as shown in FIG. 2 and the like, untreated water hardly stays in the flow path 10a, and the efficiency of the ultraviolet treatment is higher than the configuration shown in FIG. On the other hand, if the inner tube part 30 as shown in FIG. 10 is used, the bottom plate part 32 becomes easier to use as the holding area GA of the ultraviolet LED 20 as compared with the configuration shown in FIG. When the ultraviolet LED 20 is attached to the surface of the bottom plate portion 32 of the inner tube portion 30 shown in FIG. 2 and the like on the upstream side of the flow path, the pebbles and particles that can flow in from the inflow portion 12 directly enter the glass coating material 23 (see FIG. ) May collide. Therefore, the ultraviolet LED 20 may be damaged. On the other hand, pebbles and particles are unlikely to collide with the downstream surface of the flow path of the bottom plate portion 32 of the inner tube portion 30 shown in FIG. Therefore, the bottom plate portion 32 of the inner tube portion 30 shown in FIG. 10 is easily used as the holding area GA of the ultraviolet LED 20, and more ultraviolet LEDs 20 can be arranged. However, the number of the ultraviolet LEDs 20 is determined according to the required ultraviolet processing capability, and the configuration may be such that the bottom plate 32 is not used as the holding area GA as shown in FIG.

  Further, it is preferable to set the ratio of the volume in the inner tube portion 30 to the entire volume in the main body portion 11 of the flow path partitioning body 10 in FIG. 10 to be 0.1 to 0.8. By doing so, the stagnation of untreated water in the inner pipe portion 30 can be further suppressed.

  The water treatment apparatus according to the present invention is not limited to the specific configurations described in the above-described embodiments and modifications, and various modifications and changes can be made without departing from the scope of the claims. In the water treatment apparatus shown in the above-described embodiment and the modified example, the plurality of ultraviolet LEDs are attached to the outer peripheral surface of the peripheral wall of the inner tube, but one or more ultraviolet LEDs are attached to the outer surface of the bottom plate of the inner tube. You may further attach to. However, as described above, when the ultraviolet LED is attached to the outer surface of the bottom plate, it is preferable to adopt the configuration of the inner tube 30 shown in FIG. In addition, a turbulent flow forming member that causes turbulent flow in the water to be treated in the inner pipe may be further arranged in the flow path of the water treatment apparatus shown in the above-described embodiment and the modified example. As the turbulence forming member, for example, a spherical body or the like arranged near the opening of the inner pipe portion may be mentioned.

    The present invention relates to a water treatment apparatus, and more particularly, to a water treatment apparatus that irradiates treated water with ultraviolet light.

1: water treatment device 10: flow path partition 10a: flow path 11: main body 11a: main body flow path 12: inlet 12a: inlet 13: outlet 13a: outlet 14, inlet 14a: inflow space. 14b: inflow pipe 14c: annular flange 15: outflow 15a: outflow space 15b: outflow pipe 15c: annular flange 16: double pipe 16a: annular processing space 16b: upstream annular flange 16c: downstream Annular flange part 16d: Connecting part 20: UV LED
21: LED element 22: LED substrate 23: Glass coating material 30: Inner tube part 30a: Inner tube space 31: Open mouth 32: Bottom plate 33: Open end tip 34: Open end base end 40: Outer tube part 50 : Signal line 60: guide part 60 a: projecting part 60 a 1: top part 100 a to 100 e: water treatment device 200: flow path inlet member 300: flow path outlet member 400: double pipe member 500: double pipe expansion member 516 a: expansion ring Processing space 516b: Upstream annular flange portion 516c: Downstream annular flange portion 530: Additional inner tube portion 530a: Additional inner tube space 540: Additional outer tube portion A: Liquid sending direction B: Radial direction C of inner tube portion: Inside Axial direction L of tube portion: Axial length of inner tube space AR1, AR2: Flow of water to be treated GA: Holding region ID of ultraviolet LED in inner tube portion ID1: Inner diameter of outer tube portion ID2: Inner diameter of inner tube portion

Claims (7)

A water treatment apparatus that performs ultraviolet treatment of water to be treated using ultraviolet light,
A flow path section in which a flow path through which the water to be treated flows is formed,
An ultraviolet LED that irradiates ultraviolet rays to the water to be treated flowing in the flow path,
The flow path partition body, in the flow path, includes an inner pipe portion extending from the flow path upstream to the flow path downstream,
The ultraviolet LED is held in a holding region of a peripheral wall of the inner tube portion, and can irradiate ultraviolet light toward the treatment water flowing radially outside the inner tube portion,
The water treatment device, wherein the inner pipe portion is closed at one end side of the flow path upstream side and the flow path downstream side, and is opened at the other end side.   The water treatment device according to claim 1, wherein the inner pipe is closed on an upstream side of the flow path and is opened on a downstream side of the flow path.   The flow path partition body further includes a guide section that guides the water to be treated into the inside of the inner pipe section through an opening of the inner pipe section on a downstream side of the flow path from the inner pipe section. A water treatment apparatus as described in the above. The inner wall of the flow path partition body is provided at a position on the downstream side of the flow path relative to the inner pipe portion, which is provided at a position facing the opening of the inner pipe portion in the axial direction of the inner pipe portion. It has a protruding part that protrudes toward,
The water treatment device according to claim 3, wherein the guide portion is configured by the protrusion. The inner wall of the flow path partition body, on the downstream side of the flow path from the inner pipe portion, includes a protruding portion that protrudes perpendicular to the axial direction of the inner pipe portion,
The water treatment device according to claim 3, wherein the guide portion is configured by the protrusion.   The water treatment device according to any one of claims 2 to 5, wherein an end surface of the inner pipe portion on the downstream side of the flow path is inclined with respect to an axial direction of the inner pipe portion.   The water treatment device according to claim 1, wherein the inner pipe is closed at a downstream side of the flow path and is opened at an upstream side of the flow path.

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