JP7381365B2 - water treatment equipment - Google Patents

Description

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

In recent years, a technique using ultraviolet irradiation has been studied as a technique for sterilizing water to be treated such as drinking water. Such technology for sterilizing water to be treated using ultraviolet irradiation includes a water treatment device that includes a flow path through which the water to be treated flows and a light source that irradiates the water to be treated with ultraviolet rays flowing in this flow path. used. Patent Document 1 discloses this type of water treatment device.

Patent Document 1 discloses a water treatment device in which the inside of a treatment tank is divided into an outgoing flow path communicating with an inflow portion and a return flow path communicating with an outflow portion by a partition member. Further, in Patent Document 1, an ultraviolet LED (Ultra Violet-Light Emitting Diode) that irradiates ultraviolet rays is provided in a partition member, one channel to which ultraviolet rays from the ultraviolet LED is irradiated is used as an ultraviolet irradiation channel, and the other is an ultraviolet irradiation channel. It is disclosed that the flow path is used as a cooling flow path for cooling an ultraviolet LED.

Japanese Patent Application Publication No. 2014-161767

According to the water treatment device of Patent Document 1, the water to be treated can be treated with ultraviolet light by irradiating the water flowing through the ultraviolet irradiation channel with ultraviolet rays from the ultraviolet LED. Furthermore, according to the water treatment device of Patent Document 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, there is no need to provide a passage through which the fluid for cooling the ultraviolet LEDs flows, separate from the above-mentioned flow passage.

However, in the water treatment device of Patent Document 1, the entire flow path is formed into sections such that the ultraviolet irradiation flow path and the cooling flow path are folded back and connected. Therefore, the flow path within the water treatment device tends to become complicated, and there is still room for improvement.

An object of the present invention is to provide a water treatment device that can perform ultraviolet treatment of water to be treated and cool ultraviolet LEDs using a simple flow path.

A water treatment device according to a first aspect of the present invention is a water treatment device that performs ultraviolet treatment on water to be treated using ultraviolet rays, and includes a channel section in which a channel through which the water to be treated flows is formed. and an ultraviolet LED that irradiates the water to be treated flowing in the flow path with ultraviolet rays, and the flow path partitioning body is configured to extend from the upstream side of the flow path to the downstream side of the flow path in the flow path. The ultraviolet LED is held in a holding area of a peripheral wall of the inner tube and is capable of irradiating ultraviolet rays toward the water to be treated flowing radially outside the inner tube. The inner tube portion is closed at one end of the upstream side of the flow path and the downstream side of the flow path, and is open at the other end, and the flow path dividing body is A convex portion is provided on the inner wall facing the flow path located on the radially outer side.

A water treatment device according to a second aspect of the present invention is a water treatment device that performs ultraviolet treatment on water to be treated using ultraviolet rays, and includes a channel section in which a channel through which the water to be treated flows is formed. and an ultraviolet LED that irradiates the water to be treated flowing in the flow path with ultraviolet rays, and the flow path partitioning body is configured to extend from the upstream side of the flow path to the downstream side of the flow path in the flow path. The ultraviolet LED is held in a holding area of a peripheral wall of the inner tube and is capable of irradiating ultraviolet rays toward the water to be treated flowing radially outside the inner tube. The inner tube portion is closed at one end of the upstream side of the flow path and the downstream side of the flow path, and is open at the other end, and the flow path dividing body is configured to close the inner tube portion. a substantially cylindrical main body, an inlet that protrudes radially outward from the outer circumferential surface of the main body, and an outlet that protrudes radially outward from the outer circumferential surface of the main body. , at least one of the inflow port and the outflow port extends from a connection position with the outer circumferential surface of the main body in a direction inclined with respect to a normal direction of the outer circumferential surface of the main body. ing.

In one embodiment of the present invention, each of the inflow port and the outflow port extends from a connection position with the outer circumferential surface of the main body in a direction inclined with respect to a normal direction of the outer circumferential surface of the main body. Extending.

A water treatment device according to a third aspect of the present invention is a water treatment device that performs ultraviolet treatment on water to be treated using ultraviolet rays, and includes a channel section in which a channel through which the water to be treated flows is formed. and an ultraviolet LED that irradiates the water to be treated flowing in the flow path with ultraviolet rays, and the flow path partitioning body is configured to extend from the upstream side of the flow path to the downstream side of the flow path in the flow path. an inner tube portion extending toward the inner tube portion, the inner tube portion being closed on the upstream side of the flow path and open on the downstream side of the flow path, containing the ultraviolet LED, and having a holding area on the peripheral wall of the inner tube portion; a first light emitting section that is held on the bottom wall of the inner tube section and includes a first light emitting section capable of irradiating ultraviolet rays toward the water to be treated flowing on the radially outer side of the inner tube section, and the ultraviolet LED; A second light emitting section capable of irradiating ultraviolet rays toward the water to be treated flowing on the upstream side of the bottom wall.

As one embodiment of the present invention, the light emitting area per unit area of the second light emitting section is larger than the light emitting area per unit area of the first light emitting section.

In one embodiment of the present invention, the light emitting area of the first light emitting section is larger on the downstream side of the flow path than on the upstream side of the flow path.

The water treatment device as one embodiment of the present invention includes the ultraviolet LED, is held on the inner wall of the flow path sectioning body facing the flow path on the upstream side of the flow path than the inner pipe portion, and A third light emitting part is provided that can irradiate ultraviolet rays toward the water to be treated flowing in the flow path on the upstream side of the flow path.

The water treatment device as one embodiment of the present invention includes the ultraviolet LED, is held on the inner wall of the flow path sectioning body facing the flow path on the downstream side of the flow path from the inner pipe portion, and A fourth light emitting part is provided that can irradiate ultraviolet rays toward the water to be treated flowing in the flow path on the downstream side of the flow path.

A water treatment device according to a fourth aspect of the present invention is a water treatment device for treating water to be treated with ultraviolet rays using ultraviolet rays, the flow path section having a flow path through which the water to be treated flows. and an ultraviolet LED that irradiates the water to be treated flowing in the flow path with ultraviolet rays, and the flow path partitioning body is configured to extend from the upstream side of the flow path to the downstream side of the flow path in the flow path. The ultraviolet LED is held in a holding area of a peripheral wall of the inner tube and is capable of irradiating ultraviolet rays toward the water to be treated flowing radially outside the inner tube. The inner tube portion is closed at one end of the upstream side of the flow path and the downstream side of the flow path, and is open at the other end, and the flow path dividing body is A support portion is provided that extends in the axial direction and supports the inner tube portion from an upstream side of the flow path and a downstream side of the flow path of the inner tube portion.

In one embodiment of the present invention, the flow path partitioning body includes a plurality of the inner tube sections, and each inner tube section is supported by the support section.

According to the present invention, it is possible to provide a water treatment device that can perform ultraviolet treatment of water to be treated and cool ultraviolet LEDs using a simple flow path.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the outline of the water treatment apparatus as one embodiment of this invention. FIG. 2 is a sectional view of the water treatment device schematically shown in FIG. 1. 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 showing an outline of the ultraviolet LED held on the peripheral wall of the inner tube section shown in FIG. 2; FIG. 3 is a sectional view showing a state in which the water treatment device shown in FIG. 2 is further enlarged. 2 is a schematic diagram showing an outline of a water treatment device as a first modification of the water treatment device shown in FIG. 1. FIG. FIG. 2 is a schematic diagram showing an outline of a water treatment device as a second modification example of the water treatment device shown in FIG. 1. FIG. FIG. 2 is a schematic diagram showing an outline of a water treatment device as a third modification of the water treatment device shown in FIG. 1; It is a schematic diagram which shows the outline of the water treatment apparatus as a 4th modification of the water treatment apparatus shown in FIG. It is a schematic diagram which shows the outline of the water treatment apparatus as a 5th modification of the water treatment apparatus shown in FIG. It is a schematic diagram which shows the outline of the water treatment apparatus as a 6th modification of the water treatment apparatus shown in FIG. 12(a) is a cross-sectional schematic diagram of the water treatment device; FIG. 12(b) is a water treatment device as a seventh modification of the water treatment device shown in FIG. 1; FIG. 3 is a schematic side view of the device viewed from the bottom side of the main body. It is a schematic diagram which shows the outline of the water treatment apparatus as an 8th modification of the water treatment apparatus shown in FIG. It is a schematic diagram showing the outline of a water treatment device as a ninth modification of the water treatment device shown in FIG. 1. It is a perspective view of the water treatment apparatus as a 10th modification of the water treatment apparatus shown in FIG. FIG. 16 is a sectional view of the water treatment device shown in FIG. 15. 17(a) is a cross-sectional view of a water treatment device as an eleventh modification of the water treatment device shown in FIG. 1, and FIG. FIG. 17(b) is a cross-sectional view of the inner pipe section of the water treatment device taken perpendicular to the axial direction.

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of the water treatment apparatus based on this invention will be illustrated and described with reference to drawings. Common members and parts in each figure are designated by the same reference numerals.

FIG. 1 is a schematic diagram showing an overview of a water treatment device 1 as an embodiment of the water treatment device according to the present invention. As shown in FIG. 1, the water treatment device 1 includes a flow path dividing body 10 and an ultraviolet LED 20. The water treatment device 1 can perform ultraviolet treatment on water to be treated using ultraviolet light. For convenience of explanation, unless otherwise specified, both untreated water before being treated with ultraviolet light by the water treatment device 1 and treated water after being treated with ultraviolet light by the water treatment device 1 will be simply referred to as “treated water”. "treated water". Moreover, in FIG. 1, the flow of the water to be treated is shown by broken line arrows.

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

As shown in FIG. 1, the flow path partitioning body 10 includes an inner tube portion 30. As shown in FIG. The inner tube portion 30 extends from the upstream side of the flow path toward the downstream side of the flow path within the flow path 10a. Hereinafter, for convenience of explanation, the direction from the upstream side of the flow path 10a toward the downstream side of the flow path may be referred to as "water feeding direction A."

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

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

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

With reference to FIG. 1, cooling of the ultraviolet LED 20 by water to be treated will be described. By arranging the above-mentioned inner pipe section 30 in the flow path 10a, the flow rate difference and pressure difference of the water to be treated generated based on Bernoulli's theorem can be used to reduce the amount of water in the inner pipe space 30a in the inner pipe section 30. Treated water can be circulated. The ultraviolet LED 20 held in the inner tube part 30 can be cooled via the inner tube part 30 by the water to be treated circulating in the inner tube space 30a.

More specifically, as shown in FIG. 1, by arranging the above-mentioned inner pipe section 30 in the flow path 10a, the flow rate and the flow rate of the water to be treated at the position of the annular treatment space 16a can be adjusted based on Bernoulli's theorem. The pressure can be made higher than the flow rate and pressure of the water to be treated at a position downstream of the flow path from the annular treatment space 16a. Therefore, the water to be treated in the vicinity of the inner peripheral surface in the inner pipe portion 30 is pulled by the water to be treated that has just passed through the annular treatment space 16a, and moves from the open port 31 to the downstream side of the flow path. In this way, a flow of the water to be treated (see broken line arrow AR1 in FIG. 1) is formed near the inner peripheral surface of the inner tube portion 30 through the opening 31 and out of the inner tube space 30a. Furthermore, by forming this flow, a flow of the water to be treated flowing into the inner tube space 30a from the central region of the opening 31 is also formed (see broken line arrow AR2 in FIG. 1). That is, it flows into the inner tube space 30a from the central region of the open port 31 of the inner tube section 30, flows along the inner wall of the inner tube section 30, and flows into the inner tube space 30a from near the inner peripheral surface of the inner tube section 30 through the open port 31. A series of circulation paths for 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 section 30, and the cooling effect is maintained. Therefore, the ultraviolet LED 20 held in the inner tube section 30 can be cooled via the inner tube section 30 by the water to be treated flowing through the circulation path in the inner tube space 30a.

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

Note that the inner tube space 30a of the inner tube portion 30 of this embodiment is closed on the upstream side of the flow path with respect to the holding area GA, and is open 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 tube portion 30 may be closed on the downstream side of the flow path and open on the upstream side of the flow path (see FIG. 10). It is sufficient that it is closed at one end on the downstream side of the flow path and opened at the other end.

Hereinafter, details of each member of the water treatment device 1 of this embodiment will be explained. FIG. 2 is a sectional view of the water treatment device 1. FIG. 3 is a diagram showing a double pipe member 400 that constitutes the double pipe section 16 of the water treatment device 1.

[Flow path partition body 10]
As shown in FIG. 2, the flow path partitioning body 10 of this embodiment has a substantially cylindrical main body 11 and an axial direction of this main body 11 (in this embodiment, the same direction as the axial direction C of the inner tube part 30). A cylindrical inlet portion 12 protrudes outward in the radial direction B from the outer peripheral surface at one end side (hereinafter referred to as “axial direction C”), and the other end side of the main body portion 11 in the axial direction C. and a cylindrical outlet portion 13 protruding outward in the radial direction B from the outer circumferential surface. The flow path 10a defined by the flow path partitioning body 10 of this embodiment includes a main body flow path 11a in the main body portion 11, an inlet 12a in the inlet portion 12, an outlet 13a in the outlet portion 13, It is made up of. In FIG. 2, the flow of the water to be treated is shown by broken line arrows only at the positions of the channel opening 12 and the outlet 13.

Although details will be described later, the inlet port 12 may be configured to protrude toward the outside in the axial direction C (to the left in FIG. 2) from the bottom surface located on one end side of the main body 11 in the axial direction C (FIG. 6 reference). Although details will be described later, the outlet portion 13 may be configured to protrude toward the outside in the axial direction C (to the right in FIG. 2) from the bottom surface of the main body portion 11 located on the other end side in the axial direction C. (See Figure 6).

The main body portion 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. One end of the inflow space 14a on the upstream side of the flow path is closed, and the other end on the downstream side of the flow path is open. In other words, the downstream end of the flow path of the inflow pipe portion 14b is an open end. The annular flange portion 14c projects outward in the radial direction B from the other downstream end of the flow path of the inflow pipe portion 14b.

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

In the outflow portion 15, an outflow space 15a of the main body channel 11a is formed. 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. In other words, the upstream end of the outflow pipe portion 15b is an open end. The annular flange portion 15c projects outward in the radial direction B from one end on the upstream side of the flow path of the outflow pipe portion 15b.

The above-mentioned cylindrical outlet portion 13 protrudes from the outer peripheral surface of the outlet pipe portion 15b. The water to be treated flows out of the main body part 11 from the outflow space 15a through the outflow port 13a of the outflow port part 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. Further, the double pipe portion 16 is continuous with the outflow portion 15 at the other downstream end of the flow path.

More specifically, the double tube section 16 includes a cylindrical tube section as an inner tube section 30 and a cylindrical tube section as an outer tube section 40 surrounding the outside of the inner tube 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 tube section 30 extends within the outer tube section 40 in the water supply direction A, which is the axial direction of the outer tube section 40 . The central axis of the inner tube part 30 substantially coincides with the central axis of the outer tube part 40. Therefore, the axial direction of the outer tube section 40 in this embodiment is the same as the axial direction C of the inner tube section 30. In other words, the inner tube section 30 and the outer tube section 40 are arranged concentrically so that their central axes substantially coincide with each other. The inner tube portion 30 is held in position within the outer tube portion 40 by a connecting portion 16d, which will be described later. The above-mentioned annular processing space 16a is defined between the inner tube section 30 and the outer tube section 40.

As described above, the inner tube space 30a formed inside the inner tube section 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 open.

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

As shown in FIG. 2, the inflow space 14a of the inflow section 14 communicates with the annular processing space 16a of the double pipe section 16. Further, as shown in FIG. 2, the outflow space 15a of the outflow section 15 communicates with the annular processing space 16a of the double pipe section 16. Therefore, the water to be treated that has flowed into the inlet 12a from the outside of the main body 11 passes through the inflow space 14a, the annular treatment space 16a, and the outflow space 15a in this order, and flows out of the main body 11 from the outlet 13a. 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 the untreated water is treated with ultraviolet light.

The connecting portion 16d connects the outer wall of the inner tube portion 30 and the inner wall of the outer tube portion 40. As shown in FIG. 3, the connecting portion 16d of this embodiment is constituted by a plurality of spoke portions that extend radially 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 the gap between the circumferentially adjacent spoke parts.

Note that the connecting portion 16d is not limited to the configuration of this embodiment. The connecting portion 16d is a communication port that can maintain the position of the inner tube portion 30 within the outer tube portion 40 and allows the flow of water to be treated in the annular treatment space 16a (for example, a communication port between the spoke portions of this embodiment). The structure is not particularly limited as long as it partitions a gap).

Further, a signal line such as a conducting wire extending from the ultraviolet LED 20 held on the peripheral wall of the inner tube section 30 to the outside of the channel section 10 may be passed through a plurality of spoke sections as the connecting section 16d to the outside of the channel section 10. You can pull it out.

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

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

Specifically, the above-mentioned upstream annular flange part 16b of the double pipe member 400 is joined to the above-mentioned annular flange part 14c of the flow path inlet member 200 using a joining member such as a bolt, a nut, a lock pin, etc. . The overlapping 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 this 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 circumferential area. The upstream annular flange portion 16b and the annular flange portion 14c are overlapped so that their bolt insertion holes communicate with each other, and are joined using bolts and nuts using the bolt insertion holes. Thereby, in the flow path inlet member 200 and the double pipe member 400, the inflow space 14a and the annular processing space 16a are connected in a liquid-tight state. The same applies to the connection between the downstream annular flange portion 16c of the double pipe member 400 and the annular flange portion 15c of the flow path outlet member 300. Thereby, in the flow path outlet member 300 and the double pipe member 400, the outflow space 15a and the annular processing space 16a are connected in a liquid-tight state.

However, in the flow path partitioning body 10, the inflow part 14, the outflow part 15, and the double pipe part 16 may be integrally formed inseparably. However, like the channel partitioning body 10 of the present embodiment, the channel inlet member 200 that constitutes the inflow section 14, the channel outlet member 300 that constitutes the outflow section 15, and the two that constitute the double pipe section 16. It is preferable that the heavy pipe members 400 are configured to be mutually attachable and detachable. By doing this, for example, in the event of a failure of the ultraviolet LED 20, the double tube member 400 can be attached and detached from the channel inlet member 200 and the channel outlet member 300, and the ultraviolet LED 20 held by the inner tube section 30 can be removed. Cleaning, replacement, etc. can be easily performed. In other words, the efficiency of maintenance and inspection work for the water treatment device 1 can be improved.

The inner tube section 30 of the double tube section 16 is made of a metal with high thermal conductivity, such as stainless steel, aluminum, or copper. By doing so, the cooling efficiency of the ultraviolet LED 20 can be increased. Further, the portions of the flow path partitioning body 10 other than the above-mentioned inner tube portion 30 can also be made of metal such as stainless steel, aluminum, copper, etc., similarly to the inner tube portion 30.

As an example, when the inner diameter ID1 of the outer tube part 40 is set to 100 mm to 500 mm, the inner diameter ID2 of the inner tube part 30 is set to 40 mm to 200 mm, and the axial length L of the inner tube space 30a is set to a range of 40 mm to 600 mm. It is preferable to do so. As another example, when the inner diameter ID1 of the outer tube part 40 is 500 mm to 1000 mm, the inner diameter ID2 of the inner tube part 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 it within the range of . By setting the dimensions of each part as in these two examples, it is possible to easily form the above-mentioned circulation path for the water to be treated in the inner tube part 30. In particular, it is preferable to have a dimensional relationship where L/ID2 is 0.1 or more, and more preferably a dimensional relationship where L/ID2 is 1 or more and less than 10. Further, it is preferable that ID2/ID1 satisfy a dimensional relationship of 0.3≦ID2/ID1≦0.8, and more preferably that 0.4≦ID2/ID1≦0.7. By doing so, it becomes easy for the water to be treated to flow into the inner pipe section 30, and the water to be treated that has flowed in can easily reach the end on the upstream side of the channel of the inner pipe space 30a. This makes it easier to form a circulation path in which the water to be treated is less likely to accumulate within the inner pipe portion 30.

Further, it is preferable to set the ratio of the volume inside the inner tube section 30 to the total volume inside the main body section 11 of the flow path dividing body 10 to be 0.2 to 0.8. By doing so, the above-mentioned circulation path of the water to be treated in the inner pipe section 30 can be formed more easily.

[Ultraviolet 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 part 30. As shown in FIG. 4, the ultraviolet LED 20 includes an LED element 21 as an ultraviolet light source, an LED substrate 22 that supports the LED element 21, and a glass covering material 23 that covers the LED element 21 and the LED substrate 22. .

The center wavelength or peak wavelength of the LED element 21 can be appropriately set, for example, depending on the sensitivity of the microorganism to be treated. The LED element 21 of this embodiment outputs deep ultraviolet light whose center wavelength or peak wavelength is within the range of approximately 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 with high sterilization efficiency. As such an LED element 21, a structure using aluminum gallium nitride (AlGaN), for example, is known.

The LED board 22 includes an electric circuit. The LED element 21 is electrically connected to the electric circuit of the LED board 22. The ultraviolet LED 20 is held on the peripheral wall of the inner tube section 30 by attaching the LED board 22 to the outer peripheral surface of the inner tube section 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 routed through a through hole formed in the peripheral wall of the inner tube section 30 so as to be drawn out from the outer circumference side of the inner tube section 30 to the inner circumference side. The signal line 50 is wired along the inner circumferential surface of the inner tube section 30, and is drawn out to the outside of the flow path partitioning body 10 through the above-mentioned connecting section 16d (see FIG. 3). Note that the outer peripheral surface of the signal line 50 is made 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 attached to the outer peripheral surface of the inner tube section 30. Specifically, in this embodiment, a plurality of ultraviolet LEDs 20 are attached to different positions in the circumferential direction of the inner tube portion 30. Further, in this embodiment, a plurality of ultraviolet LEDs 20 are attached to different positions in the axial direction C of the inner tube portion 30. The number of ultraviolet LEDs 20 to be installed and the installation positions depend on the performance of the ultraviolet 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 partitioning body 10. It can be designed as appropriate depending on the configuration, etc. Moreover, although FIG. 4 shows a configuration in which one ultraviolet LED 20 includes one LED element 21, one ultraviolet LED 20 may include a plurality of LED elements 21. In such a case, for example, a plurality of LED elements 21 are supported on the LED substrate 22, and the glass covering 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 section 10 to the inlet 12a, the inlet space 14a, the annular treatment space 16a, the outlet space 15a, and the outlet 13a. The liquid flows in sequence and is discharged to the outside of the channel partitioning body 10. In this series of flows, the water to be treated is treated with ultraviolet light by the ultraviolet LED 20 when passing through the annular treatment space 16a. Furthermore, the above-described circulation path (see FIG. 1) of the water to be treated in the inner tube space 30a of the inner tube 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 section 30 is always cooled by the water to be treated circulating inside, and the ultraviolet LED 20 held in the inner tube section 30 is cooled via the inner tube section 30.

Next, increasing the size of the water treatment device 1 will be explained. FIG. 5 is a sectional view showing a state in which the water treatment apparatus 1 shown in FIG. 2 is further enlarged. In FIG. 5, the flow of the water to be treated is shown by broken line arrows only at the positions of the channel opening 12 and the outlet 13. As described above, the channel partitioning body 10 shown in FIG. and a double pipe member 400 constituting the double pipe section 16. However, as shown in FIG. 5, by using a double pipe extension member 500, the flow path section The body 10 can be made even larger. Thereby, the annular processing space 16a of the double tube member 400 can be extended, and the ultraviolet processing ability can be further improved.

The channel partitioning body 10 of the water treatment apparatus 1 shown in FIG. 5 includes a channel inlet member 200, a channel outlet member 300, a double pipe member 400, and a double pipe extension member 500. 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, so their description will be omitted here.

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

Compared to the inner pipe part 30 of the double pipe member 400, the extension inner pipe part 530 of the double pipe extension member 500 is located on the upper stream side of the extension inner pipe space 530a formed inside the extension inner pipe part 530. The configuration differs in that the side ends are not closed. In other words, both the upstream and downstream ends of the expansion inner pipe section 530 are open ends. Note that, like the inner tube section 30, the additional inner tube section 530 holds the ultraviolet LED 20.

As shown in FIG. 5, by connecting the double pipe extension member 500 to the downstream side of the flow path of the double pipe member 400, the open end of the inner pipe part 30 of the double pipe member 400 on the downstream side of the flow path, An open end on the upstream side of the flow path of the extension inner pipe section 530 of the double pipe extension member 500 can be connected. Thereby, the inner tube space 30a in the inner tube section 30 of the double tube member 400 and the expansion inner tube space 530a in the expansion inner tube section 530 of the double tube extension member 500 can be communicated with each other.

The inner tube space 30a and the additional inner tube space 530a can be formed by, for example, interposing a sealing member such as an elastic body between the open end of the inner tube section 30 and the open end of the additional inner tube section 530, so that the liquid can be removed. communicate closely.

Furthermore, as shown in FIG. 5, by connecting the double pipe extension member 500 to the flow path downstream side of the double pipe member 400, the flow path downstream side of the annular processing space 16a of the double pipe member 400 and the two The flow upstream side of the expanded annular processing space 516a of the heavy pipe expansion member 500 can be communicated. 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 area where the water to be treated is treated with ultraviolet light by the ultraviolet LED 20 becomes longer, and the ultraviolet treatment ability of the water treatment device 1 is further enhanced.

Note that the double pipe member 400 and the double pipe extension member 500 are connected using an annular flange portion, similar to the connection configuration of the double pipe member 400 and the channel inlet member 200 described above. With such a connection configuration, the double pipe extension 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 partitioning body 10 can be further enlarged, and the ultraviolet treatment ability of the water treatment device 1 can be further increased. I can do it.

In the example shown in FIG. 5, one double pipe extension member 500 is added between the flow path outlet member 300 and the double pipe member 400, but any number of double pipe extension members of two or more may be added. 500 may be added. In this way, by making it possible to add an arbitrary number of double pipe extension members 500, the positions of the channel inlet member 200 and the channel outlet member 300 in the water treatment device 1 are not fixed, and the double pipe extension members 500 can be added. The positions can be set in accordance with the number of members 500 added. In other words, the degree of freedom in designing the positions of the inlet 12a and the outlet 13a can be improved. Conversely, even if the positions of the channel inlet member 200 and the channel outlet member 300 are fixed, by adjusting the number of double pipe extension members 500, the channel inlet member 200 and the channel outlet member 300 can be fixed. It is possible to realize a flow path partitioning body 10 that matches the fixed position of the outlet member 300.

Next, a modification of the water treatment device 1 described above will be described. FIG. 6 is a schematic diagram showing an outline of a water treatment device 100a as a first modification of the water treatment device 1 described above. In FIG. 6, the flow of the water to be treated is shown by broken line arrows. The water treatment apparatus 100a shown in FIG. 6 is different from the water treatment apparatus 1 shown in FIG. 1 in the positions of the inlet section 12 and the outlet section 13, and the other configurations are the same. Therefore, only the differences between the water treatment device 100a and the water treatment device 1 shown in FIG. 1 will be described here, and description of common configurations will be omitted.

As shown in FIG. 6, the inlet portion 12 of the water treatment device 100a protrudes toward the outside in the axial direction C (left side in FIG. 6) from the bottom surface located on one end side of the main body portion 11 in the axial direction C. . Further, as shown in FIG. 6, the outflow port 13 of the water treatment device 100a extends outward in the axial direction C (to the right in FIG. 6) from the bottom surface located on the other end side of the main body 11 in the axial direction C. It stands out.

In the water treatment device 1 shown in FIG. 1, the inlet port 12 and the outlet port 13 protrude outward in the radial direction B from the outer circumferential surface of the substantially cylindrical main body 11 of the flow path partitioning body 10, so that the inlet port 12 and the outlet port 13 have an annular shape. The flow rate 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 device 1 shown in FIG. 1, the opposite side (lower side in FIG. 1) facing in the radial direction B with respect to the circumferential position where the inlet port 12 and the outlet port 13 are provided. Therefore, the flow rate and pressure of the water to be treated in the annular treatment space 16a tend to increase.

On the other hand, by arranging the inlet portion 12 and the outlet portion 13 at the positions shown in FIG. 6, it is possible to reduce the flow velocity difference and pressure difference of the water to be treated depending on the position in the circumferential direction of the annular treatment space 16a. Therefore, it is possible to reduce the difference in 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 water treatment device 1 described above. In FIG. 7, the flow of the water to be treated is shown by broken line arrows. The water treatment device 100b shown in FIG. 7 differs from the water treatment device 1 shown in FIG. 1 in the presence or absence of a guide portion 60, and the other configurations are the same. 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 description of common configurations will be omitted.

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

More specifically, the inner wall of the flow path dividing body 10 shown in FIG. 7 that defines the flow path 10a includes a protrusion 60a. As shown in FIG. 7, the protruding portion 60a is provided at a position facing the opening 31 of the inner tube portion 30 in the axial direction C of the inner tube portion 30 on the downstream side of the flow path than the inner tube portion 30. There is. In other words, the protruding portion 60a is provided in a portion of the inner wall of the channel dividing body 10 located on the downstream side of the channel in the axial direction C of the main body portion 11 of the channel dividing body 10. The protruding portion 60a protrudes from the inner wall of the flow path partitioning body 10 toward the opening 31. The protruding portion 60a may be, for example, a conical or truncated conical protrusion that becomes thinner toward the apex 60a1 on the side of the opening 31. In the example shown in FIG. 7, the guide portion 60 is constituted by a protrusion 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 tube portion 30. Therefore, the cooling efficiency of the ultraviolet LED 20 held in the inner tube part 30 can be further improved.

In FIG. 7, the guide portion 60 is constituted by the above-mentioned protruding portion 60a, but if the configuration is such that it guides the flow of the water to be treated and guides the water to be treated into the inner pipe portion 30, the configuration may be changed in particular. Not limited. Therefore, the guide portion 60 is not limited to a conical or truncated conical projection. Further, the guide portion 60 may be provided at another position on the inner wall of the channel partitioning body 10. Therefore, the guide portion 60 may be, for example, a protruding portion that protrudes perpendicularly to the axial direction C of the inner tube portion 30 on the downstream side of the flow path than the inner tube portion 30 . Further, a plurality of guide portions 60 may be provided on the inner wall of the channel partitioning body 10. Furthermore, the guide portion 60 may be constituted by a separate member that is attached within the flow path 10a of the flow path partitioning body 10.

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

Further, as shown in FIG. 8, a protrusion 60a serving as a guide portion 60 may be provided on the bottom surface of the inner tube portion 30 on the upstream side of the flow path. By doing so, the water to be treated can be guided to the inner tube space 30a of another inner tube section 30 located upstream of the inner tube section 30 in which the guide section 60 is provided.

FIG. 9 is a schematic diagram showing an outline of a water treatment device 100d as a fourth modification of the water treatment device 1 described above. In FIG. 9, the flow of the water to be treated is shown by broken line arrows. The water treatment device 100d shown in FIG. 9 is different 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 the other configurations are the same. 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 description of common configurations will be omitted.

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

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

Further, as shown in FIG. 9, the position in the circumferential direction where the tip 33 of the open end of the inner tube part 30 is located is the position in the circumferential direction where the inlet port part 12 and the outlet part 13 are provided, and the position in the radial direction B are facing each other. In the water treatment apparatus 100d shown in FIG. 9, the flow rate and pressure of the water to be treated passing through the annular treatment space 16a are determined at the positions in the circumferential direction where the inlet portion 12 and the outlet portion 13 are provided (inner pipe portion 30). The position in the circumferential direction where the tip 33 of the open end of the inner tube part 30 is located is higher than the position in the circumferential direction where the proximal end 34 of the open end is located. Therefore, in the water treatment device 100d shown in FIG. 9, the number of ultraviolet LEDs 20 attached to the peripheral wall of the inner pipe part 30 shown in FIG. The direction area is larger than a predetermined circumferential area including the circumferential position of the proximal end 34 of the open end of the inner tube part 30. Thereby, it is possible to reduce variations in the ultraviolet treatment ability based on the difference in flow velocity of the water to be treated depending on the circumferential position of the annular treatment space 16a.

FIG. 10 is a sectional view of a water treatment device 100e as a fifth modification of the water treatment device 1 described above. In FIG. 10, the flow of the water to be treated is shown by broken line arrows only at the positions of the channel 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, etc. in the position of the open end of the inner pipe portion 30, and the other configurations are the same. Therefore, only the differences between the water treatment apparatus 100e and the water treatment apparatus 1 shown in FIGS. 1, 2, etc. will be described here, and description of common configurations will be omitted.

The inner tube section 30 shown in FIG. 10 is closed on the downstream side of the flow path. On the other hand, the inner tube 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 section 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 open on the upstream side of the flow path with respect to the holding area GA. That is, the upstream end of the inner tube section 30 shown in FIG. 10 is an open end in which the open port 31 is formed. The open port 31 is formed by an annular end surface on the upstream side of the flow path of the inner tube portion 30 . The size of the opening 31 is the same as the cross-sectional area of the inner tube space 30a perpendicular to the axial direction C of the inner tube portion 30. In other words, the upstream end of the inner tube space 30a is not even partially closed. On the other hand, a bottom plate portion 32 that closes the inner tube space 30a is provided at the downstream end of the flow path of the inner tube portion 30 shown in FIG. The end of the inner tube space 30a on the downstream side of the flow path is completely closed by the bottom plate portion 32.

When the inner tube part 30 is configured as shown in FIG. 2, etc., untreated water is less likely to remain in the flow path 10a, and the efficiency of ultraviolet treatment is higher than that of the configuration shown in FIG. On the other hand, if the inner tube section 30 is configured as shown in FIG. 10, the bottom plate section 32 can be more easily used as the holding area GA of the ultraviolet LED 20, compared to the configuration shown in FIG. 2 and the like. When the ultraviolet LED 20 is attached to the upstream surface of the flow path of the bottom plate part 32 of the inner tube part 30 shown in FIG. ) may collide. Therefore, there is a possibility that the ultraviolet LED 20 may be damaged. On the other hand, pebbles and particles are unlikely to collide with the surface of the bottom plate section 32 of the inner tube section 30 shown in FIG. 10 on the downstream side of the flow path. Therefore, the bottom plate part 32 of the inner tube part 30 shown in FIG. 10 can be easily used as the holding area GA of the ultraviolet LEDs 20, and more ultraviolet LEDs 20 can be arranged. However, the number of ultraviolet LEDs 20 is determined depending on the required ultraviolet processing ability, and as shown in FIG. 10, the configuration may be such that the bottom plate part 32 is not used as the holding area GA.

Further, it is preferable that the ratio of the volume inside the inner tube section 30 to the total volume inside the main body section 11 of the flow path partitioning body 10 in FIG. 10 is set to 0.1 to 0.8. By doing so, it is possible to further suppress retention of untreated water within the inner pipe portion 30.

The water treatment device according to the present invention is not limited to the specific configurations described in the embodiments and modifications described above, 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 embodiments and modified examples, a plurality of ultraviolet LEDs are attached to the outer circumferential surface of the peripheral wall of the inner tube part, and one or more ultraviolet LEDs are attached to the outer surface of the bottom plate part of the inner tube part. It may be further attached to. However, as described above, when attaching an ultraviolet LED to the outer surface of the bottom plate part, it is preferable to adopt the configuration of the inner tube part 30 shown in FIG. 10. Furthermore, a turbulent flow forming member that causes turbulence in the water to be treated in the inner pipe portion may be further disposed within the flow path of the water treatment apparatus shown in the embodiments and modifications described above. Examples of the turbulent flow forming member include a spherical body disposed near the opening of the inner tube portion.

Hereinafter, further modified examples of the water treatment apparatus according to the present invention will be described.

FIG. 11 is a schematic diagram showing an outline of a water treatment device 100f as a sixth modification example of the water treatment device 1 shown in FIG. In the water treatment apparatus 100f shown in FIG. 11, compared to the water treatment apparatus 1 shown in FIG. The difference is that a convex portion 70 is provided, and the other configurations are the same.

As shown in FIG. 11, a flow path 10a through which water to be treated flows is formed inside the flow path partitioning body 10. The ultraviolet LED 20 irradiates ultraviolet light to the water to be treated flowing in the flow path 10a. Thereby, the water to be treated flowing in the flow path 10a can be treated with ultraviolet light.

As shown in FIG. 11, the flow path partitioning body 10 includes an inner pipe portion 30. As shown in FIG. The inner tube portion 30 extends in the water supply direction A within the flow path 10a. As shown in FIG. 11, the ultraviolet LED 20 is held in a holding area GA of the peripheral wall of the inner tube part 30. Further, the ultraviolet LED 20 can irradiate ultraviolet rays toward the water to be treated flowing in the annular treatment space 16a outside the inner tube portion 30 in the radial direction B.

The inner tube portion 30 is closed on the upstream side of the flow path. On the other hand, the inner tube section 30 is open on the downstream side of the flow path. However, the inner tube portion 30 may be closed on the downstream side of the flow path and open on the upstream side of the flow path.

As described above, the flow path partitioning body 10 shown in FIG. 11 includes the convex portion 70 on the inner wall facing the flow path located on the outside in the radial direction B of the inner tube portion 30. By providing such a convex portion 70, the water to be treated tends to stay at a position outside the inner tube portion 30 in the radial direction B, where the ultraviolet rays are irradiated from the ultraviolet LED 20. Therefore, the efficiency of ultraviolet treatment by the ultraviolet LED 20 can be increased.

Specifically, the flow path partitioning body 10 shown in FIG. 11 includes a convex portion 70 that protrudes outward in the radial direction B from the outer circumferential surface of the inner tube portion 30. Further, the flow path partitioning body 10 shown in FIG. 11 includes a convex portion 70 that protrudes inward in the radial direction B from the inner circumferential surface of the outer tube portion 40. As shown in FIG. 11, the position in the axial direction C of the convex part 70 protruding from the outer circumferential surface of the inner tube part 30, the position in the axial direction C of the convex part 70 protruding from the inner circumferential surface of the outer tube part 40, is different. However, the convex portion 70 may protrude only from either the outer circumferential surface of the inner tube section 30 or the inner circumferential surface of the outer tube section 40. Considering that the ultraviolet LED 20 is arranged on the peripheral wall of the inner tube part 30, it is preferable that the convex part 70 protrudes from at least the inner circumferential surface of the outer tube part 40. By having the convex portion 70 protrude from both the outer circumferential surface of the inner tube section 30 and the inner circumferential surface of the outer tube section 40, it becomes easier for the water to be treated to stay. Therefore, the efficiency of ultraviolet treatment of the water to be treated by the ultraviolet LED 20 can be further improved.

Further, the flow path partitioning body 10 shown in FIG. 11 includes a plurality of convex portions 70 arranged at different positions in the axial direction C. More specifically, the channel partitioning body 10 of this example includes a plurality of convex portions 70 protruding from the outer circumferential surface of the inner tube portion 30. Further, the flow path partitioning body 10 of this example includes a plurality of convex portions 70 protruding from the inner circumferential surface of the outer tube portion 40. The convex portions 70 protruding from the outer circumferential surface of the inner tube portion 30 and the convex portions 70 protruding from the inner circumferential surface of the outer tube portion 40 are alternately arranged in the axial direction C. In this way, by arranging the convex portions 70 at different positions in the axial direction C, compared to the case where the convex portions 70 are disposed only at one location in the axial direction C, the outer side of the inner tube portion 30 in the radial direction B is The water to be treated flowing through becomes more likely to stagnate. Therefore, the efficiency of ultraviolet treatment of the water to be treated by the ultraviolet LED 20 can be further improved.

The convex portion 70 may be, for example, an annular plate or a spiral plate that protrudes outward in the radial direction C from the outer peripheral surface of the inner tube portion 30. Further, the convex portion 70 may be an annular plate or a spiral plate that protrudes inward in the radial direction C from the inner circumferential surface of the outer tube portion 40. Further, the convex portions 70 may be, for example, a plurality of plate-shaped protrusions arranged at a predetermined distance in the circumferential direction of the outer circumferential surface of the inner tube portion 30 and the inner circumferential surface of the outer tube portion 40. . As described above, the shape of the convex portion 70 is not particularly limited as long as it obstructs the flow of the water to be treated on the outside of the inner tube portion 30 in the radial direction B and allows the water to be treated to stay there.

The material constituting the convex portion 70 is preferably a fluororesin such as PTFE, PFA, ETFE, or the like. Fluororesin has a higher absolute reflectance and a higher diffuse reflection ratio than, for example, metals such as stainless steel. Therefore, the efficiency of ultraviolet treatment of the water to be treated flowing on the outside of the inner tube portion 30 in the radial direction B can be increased.

FIG. 12 is a schematic diagram showing an outline of a water treatment device 100g as a seventh modification of the water treatment device 1 shown in FIG. Specifically, FIG. 12(a) is a schematic cross-sectional view of the water treatment device 100g, and FIG. 12(b) is a schematic side view of the water treatment device 100g viewed from the bottom side of the main body 11.

The water treatment apparatus 100g shown in FIG. 12 is different from the water treatment apparatus 1 shown in FIG. There is.

The flow path partitioning body 10 shown in FIGS. 12(a) and 12(b) includes a substantially cylindrical main body 11 including an inner tube 30, and a direction extending outward in the radial direction B from the outer circumferential surface of the main body 11. The main body part 11 has an inflow port 12 that projects outward, and an outflow port 13 that projects outward in the radial direction B from the outer circumferential surface of the main body 11. The main body portion 11 includes an inner tube portion 30 and an outer tube portion 40 that covers the outside of the inner tube portion 30 in the radial direction B.

As shown in FIG. 12(b), the inlet port 12 extends from the connection position with the outer circumferential surface of the main body 11 in a direction inclined with respect to the normal direction D of the outer circumferential surface of the main body 11. There is. By doing so, the water to be treated that has flowed into the main body part 11 from the inflow port part 12 flows inside the inner pipe part 30 along the inner circumferential surface of the outer pipe part 40 on the outside of the inner pipe part 30 in the radial direction B. It becomes easier to proceed in the water supply direction A while turning around the pipe portion 30 (see broken line arrows in FIGS. 12(a) and 12(b)). In other words, a swirling flow of the water to be treated is likely to occur around the inner pipe portion 30. Therefore, compared to the case where the water to be treated moves linearly in the water supply direction A on the outside in the radial direction B of the inner pipe part 30, the water to be treated stays on the outside in the radial direction B of the inner pipe part 30. You can increase the time it takes to do so. Thereby, the efficiency of ultraviolet treatment by the ultraviolet LED 20 can be increased.

Note that although the inlet portion 12 shown in FIG. 12 has a cylindrical shape extending linearly from the outer circumferential surface of the main body portion 11, it is not limited to this configuration. For example, the inflow port 12 may extend in a curved manner from the outer peripheral surface of the main body portion 11, or may have a rectangular cylindrical shape.

Furthermore, in the water treatment device 100g shown in FIG. It extends in a direction inclined to the In particular, in the example shown in FIG. 12, as shown in FIGS. 12(a) and 12(b), the inlet port 12 and the outlet port 13 are the same semi-cylindrical portion of the substantially cylindrical main body 11, They extend in substantially parallel directions. Furthermore, in the example shown in FIG. 12, the inflow port 12 and the outflow port 13 are arranged at different positions in the circumferential direction of the substantially cylindrical main body 11, as shown in FIG. 12(b). By doing so, the swirling flow of the water to be treated can easily enter the outlet portion 13 on the downstream side of the flow path of the inner tube portion 30. However, in order to prevent the swirling flow of the water to be treated from entering the outlet section 13 on the downstream side of the flow path of the inner pipe section 30, the outlet section 13 is connected to the main body section 11 in the circumferential direction. The position may be set to another position.

FIG. 13 is a schematic diagram showing an outline of a water treatment device 100h as an eighth modification example of the water treatment device 1 shown in FIG. 1. The water treatment device 100h shown in FIG. 13 is different from the water treatment device 1 shown in FIG. 1 in the positions of the inlet portion 12 and the outlet portion 13. Moreover, the water treatment apparatus 100h shown in FIG. 13 is different from the water treatment apparatus 1 shown in FIG. 1 in the arrangement position and arrangement distribution of the ultraviolet LEDs 20. Other configurations of the water treatment device 100h shown in FIG. 13 are common to the water treatment device 1 shown in FIG. 1.

The positions of the inflow port 12 and the outflow port 13 are the same as in the first modification shown in FIG. 6, so their description will be omitted here.

A water treatment device 100h shown in FIG. 13 includes a first light emitting section 71 and a second light emitting section 72. The first light emitting section 71 includes an ultraviolet LED 20, is held in a holding area GA of the peripheral wall of the inner tube section 30, and is capable of irradiating ultraviolet rays toward the water to be treated flowing outside the inner tube section 30 in the radial direction B. can. More specifically, the first light emitting section 71 shown in FIG. 13 is composed of a plurality of ultraviolet LEDs 20 held in the holding area GA. Further, the second light emitting section 72 includes an ultraviolet LED 20, is held by the bottom plate section 32 as a bottom wall of the inner tube section 30, and irradiates ultraviolet light toward the water to be treated flowing on the flow upstream side of the bottom plate section 32. be able to.

In this way, in addition to the first light emitting part 71 including the ultraviolet LED 20 held on the peripheral wall of the inner tube part 30, the ultraviolet LED 20 held on the bottom plate part 32 as the bottom wall on the upstream side of the flow path of the inner tube part 30. By providing the second light emitting section 72 including the above, the efficiency of ultraviolet light treatment can be improved.

In particular, in the example shown in FIG. 13, the inlet port 12 protrudes from the bottom surface of the main body 11 in the axial direction C toward the outside in the axial direction C (left side in FIG. 2). The water to be treated that flows into the inner pipe 11 bounces off the bottom plate 32 of the inner tube 30 and tends to stay on the upstream side of the flow path of the bottom plate 32. Therefore, it is preferable that the second light emitting section 72 provided in the bottom plate part 32 has a large light emitting area per unit area to further improve the efficiency of ultraviolet treatment of the water to be treated. In particular, the water to be treated is more likely to stay at a position on the upstream side of the flow path of the inner pipe part 30 than at a position outside the inner pipe part 30 in the radial direction B. Therefore, the light emitting area per unit area of the second light emitting section 72 is preferably larger than the light emitting area per unit area of the first light emitting section 71, for example. In this way, the efficiency of ultraviolet treatment of the water to be treated can be further improved. Note that the light emitting area per unit area can be adjusted, for example, by increasing or decreasing the number of ultraviolet LEDs 20 arranged per unit area.

Further, it is preferable that the light emitting area of the first light emitting section 71 is larger on the downstream side of the flow path than on the upstream side of the flow path. In the water treatment apparatus 100h shown in FIG. 13, the flow velocity of the water to be treated at the outer position in the radial direction B of the inner pipe portion 30 is slower on the downstream side of the flow path than on the upstream side of the flow path. Therefore, by increasing the light emitting area of the first light emitting section 71 on the downstream side of the flow path, it is possible to further improve the efficiency of ultraviolet treatment of the water to be treated at the outer position in the radial direction B of the inner tube section 30. can.

Note that in FIG. 13, the light emitting area per unit area of the second light emitting section 72 at an arbitrary position is larger than the light emitting area per unit area of the first light emitting section 71 at an arbitrary position.

FIG. 14 is a schematic diagram showing an outline of a water treatment device 100i as a ninth modification example of the water treatment device 1 shown in FIG. The water treatment device 100i shown in FIG. 14 has a different configuration from the water treatment device 100h shown in FIG. 13 in that it includes a third light emitting section 73 and a fourth light emitting section 74, but the other structure is the same as that in FIG. This is common to the water treatment device 100h shown in FIG.

As shown in FIG. 14, the third light emitting section 73 includes the ultraviolet LED 20, and is held on the inner wall of the channel dividing body 10 facing the channel 10a on the upstream side of the channel from the inner tube section 30. The third light emitting section 73 can irradiate ultraviolet rays toward the water to be treated flowing through the channel 10a on the upstream side of the channel from the inner tube section 30. By providing the third light emitting section 73 in addition to the first light emitting section 71 and the second light emitting section 72, the efficiency of ultraviolet treatment of the water to be treated can be further improved.

Further, as shown in FIG. 14, the fourth light emitting section 74 includes the ultraviolet LED 20, and is held on the inner wall of the channel partitioning body 10 facing the channel 10a on the downstream side of the channel from the inner tube section 30. The fourth light emitting section 74 can irradiate ultraviolet rays toward the water to be treated flowing through the flow path 10a on the downstream side of the flow path from the inner tube section 30. By providing the fourth light emitting section 74 in addition to the first light emitting section 71 and the second light emitting section 72, the efficiency of ultraviolet treatment of the water to be treated can be further improved.

Note that the third light emitting section 73 is preferably disposed on the upstream side of the flow path of the inner tube section 30 over the entire circumferential area of the inner circumferential surface of the main body section 11 . Furthermore, it is preferable that the third light emitting section 73 is also disposed on the inner surface of the bottom plate section on one end side in the axial direction C (left side in FIG. 14) of the main body section 11 where the inlet section 12 is provided. By doing so, the efficiency of ultraviolet treatment of the water to be treated can be further improved.

Further, the fourth light emitting section 74 is also preferably disposed on the downstream side of the flow path of the inner tube section 30 over the entire circumferential direction of the inner circumferential surface of the main body section 11 . Furthermore, it is preferable that the fourth light emitting section 74 is also arranged on the inner surface of the bottom plate section on the other end side (right side in FIG. 14) of the main body section 11 in the axial direction C, where the outlet section 13 is provided. . By doing so, the efficiency of ultraviolet treatment of the water to be treated can be further improved.

FIG. 15 is a perspective view of a water treatment device 100j as a tenth modification of the water treatment device 1 shown in FIG. FIG. 16 is a cross-sectional view of the water treatment device 100j shown in FIG. 15 taken along the axial direction C of the inner pipe portion 30. In FIG. 15, a part of the ultraviolet LED 20 held on the peripheral wall of the inner tube part 30 is omitted (in FIG. 15, the omitted part is indicated by a two-dot chain line). The water treatment device 100j shown in FIGS. 15 and 16 differs from the water treatment device 1 shown in FIG. 1 mainly in the support structure of the inner pipe portion 30.

The flow path partitioning body 10 shown in FIGS. 15 and 16 extends in the axial direction C of the inner tube section 30, and supports the inner tube section 30 from the upstream side and the downstream side of the flow path of the inner tube section 30. 75. More specifically, the support section 75 shown in FIG. 15 and FIG. It includes a rod-shaped downstream support portion 75b that protrudes toward the downstream side of the road. The upstream support portion 75a and the downstream support portion 75b extend linearly in the axial direction C, and are removable from the bottom plate portions 11b on both sides of the main body portion 11 in the axial direction C using fastening members such as bolts. It has been concluded.

As shown in FIGS. 15 and 16, the bottom plate portion 11b on one side of the main body portion 11 is constituted by a cover member 76 that is detachable from other parts of the main body portion 11. As shown in FIGS. Therefore, according to the water treatment device 100j shown in FIGS. 15 and 16, the fastening member is removed from the bottom plate portion 11b on one side in the axial direction C of the main body portion 11 (the left side in FIGS. 15 and 16), and the inner tube portion 30 is removed. The support portion 75 and the cover member 76 can be pulled out from the other side of the main body portion 11 in the axial direction C (the right side in FIGS. 15 and 16). By doing so, the inner tube portion 30 can be easily taken out to the outside. Therefore, according to the water treatment apparatus 100j shown in FIGS. 15 and 16, maintenance, inspection, replacement, etc. of the inner pipe portion 30 are facilitated.

Note that four upstream support parts 75a and four downstream support parts 75b shown in FIGS. 15 and 16 are arranged at predetermined intervals in the circumferential direction of the inner tube part 30, but the number and arrangement in the circumferential direction The location is not particularly limited.

FIG. 17 is a sectional view of a water treatment device 100k as an eleventh modification of the water treatment device 1 shown in FIG. Specifically, FIG. 17(a) is a cross-sectional view taken along the axial direction C of the inner pipe portion 30 of the water treatment device 100k, and FIG. 17(b) is a cross-sectional view of the inner pipe portion 30 of the water treatment device 100k. FIG. The water treatment device 100k shown in FIG. 17 has a plurality of inner pipe portions 30 and support portions 75 shown in FIGS. The configuration is different from 100j. As shown in FIGS. 17(a) and 17(b), the channel dividing body 10 may include a plurality of inner tube portions 30 holding the ultraviolet LEDs 20 on the peripheral wall. As shown in FIG. 17(a), each inner tube portion 30 may be supported by a support portion 75. Although the flow path partitioning body 10 shown in FIG. 17 includes four inner tube portions 30 in the flow path 10a, the number of inner tube portions 30 is not particularly limited. Further, the number of support portions 75 protruding from each inner tube portion 30 is not particularly limited.

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

1: Water treatment device 10: Channel partition body 10a: Channel 11: Main body section 11a: Main channel section 11b: Bottom plate section 12: Inlet section 12a: Inlet 13: Outlet section 13a: Outlet 14: Inlet section 14a: Inflow space 14b: Inflow pipe part 14c: Annular flange part 15: Outflow part 15a: Outflow space 15b: Outflow pipe part 15c: Annular flange part 16: Double pipe part 16a: Annular processing space 16b: Upstream annular flange part 16c: Downstream annular flange portion 16d: Connection portion 20: Ultraviolet LED
21: LED element 22: LED board 23: Glass covering material 30: Inner tube portion 30a: Inner tube space 31: Open port 32: Bottom plate portion 33: Open end tip 34: Open end base end 40: Outer tube portion 50 : Signal line 60: Guide section 60a: Protrusion section 60a1: Top section 70: Convex section 71: First light emitting section 72: Second light emitting section 73: Third light emitting section 74: Fourth light emitting section 75: Support section 75a: Upstream support Part 75b: Downstream support part 76: Cover members 100a to 100k: Water treatment device 200: Channel inlet member 300: Channel outlet member 400: Double pipe member 500: Double pipe extension member 516a: Extension annular processing space 516b: Upstream annular flange part 516c: Downstream annular flange part 530: Extension inner pipe part 530a: Extension inner pipe space 540: Extension outer pipe part A: Liquid feeding direction B: Radial direction of the inner pipe part C: Axis of the inner pipe part Direction D: Normal direction of the outer circumferential surface of the main body L: Axial length of the inner tube space AR1, AR2: Flow of water to be treated GA: Holding area of the ultraviolet LED in the inner tube ID1: Inner diameter ID2 of the outer tube : Inner diameter of inner tube part

Claims (9)

A water treatment device for treating water to be treated with ultraviolet light using ultraviolet light,
a channel partitioning body in which a channel through which the water to be treated flows is formed;
an ultraviolet LED that irradiates ultraviolet light to the water to be treated flowing in the flow path,
The flow path partitioning body includes an inner pipe portion extending from an upstream side of the flow path toward a downstream side of the flow path within the flow path,
The ultraviolet LED is held in a holding area of the peripheral wall of the inner tube portion and is capable of irradiating ultraviolet light toward the water to be treated flowing radially outside the inner tube portion,
The inner tube portion is closed at one end of the upstream side of the flow path and the downstream side of the flow path, and is open at the other end side,
In the water treatment device, the flow path partitioning body includes a convex portion on an inner wall facing the flow path located on the radially outer side of the inner pipe portion. A water treatment device for treating water to be treated with ultraviolet light using ultraviolet light,
a channel partitioning body in which a channel through which the water to be treated flows is formed;
an ultraviolet LED that irradiates ultraviolet light to the water to be treated flowing in the flow path,
The flow path partitioning body includes an inner pipe portion extending from an upstream side of the flow path toward a downstream side of the flow path within the flow path,
The ultraviolet LED is held in a holding area of the peripheral wall of the inner tube portion, and is capable of irradiating ultraviolet light toward the water to be treated flowing radially outside the inner tube portion,
The inner tube portion is closed at one end of the upstream side of the flow path and the downstream side of the flow path, and is open at the other end side,
The flow path partition body is
a substantially cylindrical main body portion including the inner tube portion;
an inflow port projecting radially outward from the outer circumferential surface of the main body;
an outflow port projecting radially outward from the outer circumferential surface of the main body,
The inlet port extends from a connection position with the outer circumferential surface of the main body in a direction inclined in the circumferential direction of the main body with respect to the normal direction of the outer circumferential surface of the main body. Device. Each of the inflow port and the outflow port extends from a connection position with the outer circumferential surface of the main body in a direction that is inclined in the circumferential direction of the main body with respect to the normal direction of the outer circumferential surface of the main body. The water treatment device according to claim 2. A water treatment device for treating water to be treated with ultraviolet light using ultraviolet light,
a channel partitioning body in which a channel through which the water to be treated flows is formed;
an ultraviolet LED that irradiates ultraviolet light to the water to be treated flowing in the flow path,
The flow path partitioning body includes an inner pipe portion extending from an upstream side of the flow path toward a downstream side of the flow path within the flow path,
The inner tube portion is closed on the upstream side of the flow path and opened on the downstream side of the flow path,
a first light emitting section that includes the ultraviolet LED, is held in a holding area of a peripheral wall of the inner tube section, and is capable of irradiating ultraviolet rays toward the water to be treated that flows radially outward of the inner tube section;
a second light emitting section that includes the ultraviolet LED, is held on the bottom wall of the inner tube section, and is capable of irradiating ultraviolet rays toward the water to be treated flowing on the upstream side of the flow path of the bottom wall. Device. The water treatment device according to claim 4, wherein a light emitting area per unit area of the second light emitting section is larger than a light emitting area per unit area of the first light emitting section. The water treatment device according to claim 5, wherein the light emitting area of the first light emitting section is larger on the downstream side of the flow path than on the upstream side of the flow path. The light source includes the ultraviolet LED, is held on the inner wall of the flow path partitioning body facing the flow path on the upstream side of the flow path from the inner tube portion, and flows through the flow path on the upstream side of the flow path from the inner tube portion. The water treatment device according to any one of claims 4 to 6, comprising a third light emitting section capable of irradiating ultraviolet rays toward the treated water. The cover includes the ultraviolet LED, is held on the inner wall of the flow path partitioning body facing the flow path on the downstream side of the flow path from the inner tube portion, and flows through the flow path on the downstream side of the flow path from the inner tube portion. The water treatment device according to any one of claims 4 to 7, comprising a fourth light emitting section capable of irradiating ultraviolet rays toward the treated water. A water treatment device for treating water to be treated with ultraviolet light using ultraviolet light,
a channel partitioning body in which a channel through which the water to be treated flows is formed;
an ultraviolet LED that irradiates ultraviolet light to the water to be treated flowing in the flow path,
The flow path partitioning body includes an inner pipe portion extending from an upstream side of the flow path toward a downstream side of the flow path within the flow path,
The ultraviolet LED is held in a holding area of the peripheral wall of the inner tube portion, and is capable of irradiating ultraviolet light toward the water to be treated flowing radially outside the inner tube portion,
The inner tube portion is closed at one end of the upstream side of the flow path and the downstream side of the flow path, and is open at the other end side,
A water treatment device, wherein the flow path partitioning body includes a support portion that extends in the axial direction of the inner tube portion and supports the inner tube portion from an upstream side of the flow path and a downstream side of the flow path of the inner tube portion.

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