CN214456999U

CN214456999U - Fluid sterilizing device

Info

Publication number: CN214456999U
Application number: CN202120238381.2U
Authority: CN
Inventors: 角武法; 伊藤直人
Original assignee: Asahi Kasei Corp
Current assignee: Asahi Kasei Corp; Asahi Chemical Industry Co Ltd
Priority date: 2021-01-28
Filing date: 2021-01-28
Publication date: 2021-10-22
Anticipated expiration: 2031-01-28

Abstract

The utility model provides a fluid disappears and kills device has: a cylindrical portion forming a treatment flow path extending in a longitudinal direction; and a housing portion that houses the cylindrical portion, the housing portion having an inflow portion through which a fluid flows from outside into the housing and an outflow portion through which the fluid flows out, the fluid killing apparatus including: a first chamber that communicates the inflow portion with a first opening portion of the processing flow path located on one end side in a longitudinal direction; a second chamber that communicates the outflow portion with a second opening portion of the processing flow path located on the other end side in the longitudinal direction; and a light emitting element provided at a position closer to the other end side in the longitudinal direction of the treatment channel, and configured to irradiate ultraviolet light to the fluid passing through the treatment channel, wherein the inflow portion and the outflow portion are both located at a position closer to the one end side in the longitudinal direction of the housing portion. By adopting the fluid sterilizing device, the miniaturization of the device can be realized.

Description

Fluid sterilizing device

Technical Field

The utility model relates to a fluid disappears and kills device.

Background

Conventionally, when a fluid containing water or the like is sterilized by ultraviolet light, an ultraviolet light source such as a mercury lamp or a xenon lamp is used. In recent years, by putting an LED capable of emitting a wavelength capable of being extinguished into practical use, an apparatus configuration which cannot be realized by an ultraviolet light source of a bulb can be formed.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2019-187657

SUMMERY OF THE UTILITY MODEL

Problem to be solved by utility model

The conventional running water disinfection apparatus using an ultraviolet light source such as a mercury lamp or a xenon lamp cannot be miniaturized because the size of the apparatus is larger than that of the light source.

Accordingly, the present invention has been made keeping in mind the above problems unsolved prior art, and an object of the present invention is to provide a fluid sterilizing device using a small-sized feature having an LED as an ultraviolet light source.

Means for solving the problems

The utility model discloses a technical scheme's fluid disappears and kills device's characterized in that, this fluid disappears and kills device has: a cylindrical portion forming a treatment flow path extending in a longitudinal direction; and a housing portion that houses the cylindrical portion, the housing portion having an inflow portion through which a fluid flows from outside into the housing and an outflow portion through which the fluid flows out, the fluid killing apparatus including: a first chamber that communicates the inflow portion with a first opening portion of the processing flow path located on one end side in a longitudinal direction; a second chamber that communicates the outflow portion with a second opening portion of the processing flow path located on the other end side in the longitudinal direction; and a light emitting element provided at a position closer to the other end side in the longitudinal direction of the treatment channel, and configured to irradiate ultraviolet light to the fluid passing through the treatment channel, wherein the inflow portion and the outflow portion are both located at a position closer to the one end side in the longitudinal direction of the housing portion.

In the fluid sterilizer, a seal member may be provided between the cylindrical portion and the housing portion to seal between the first chamber and the second chamber.

In the fluid sterilizing device, a communication port may be provided in the vicinity of the other end side in the longitudinal direction of the cylindrical portion, and the processing flow path may communicate with the second chamber only through the communication port.

In the fluid sterilizing apparatus, a change amount of a main cross-sectional area of the treatment flow path from one end side in the longitudinal direction to the other end side in the longitudinal direction may be 5% or less.

In the fluid sterilizing apparatus, the first chamber and the treatment flow path may be connected to each other via a communication path, the communication path may be formed of 1 or more plate materials having a plurality of holes, and the opening ratio of the communication path to the entire area of the plate materials may be 0.05 or more and 0.8 or less.

In the fluid sterilizing apparatus, an inner end of the outermost hole of the plate material may be smaller than an inner diameter of the treatment flow path.

In the fluid sterilizing device, a cross-sectional area of the first chamber taken along a plane perpendicular to the longitudinal direction may be larger toward the plate material.

In the fluid sterilizer, a second hole and a first hole having a smaller diameter than the cylindrical portion may be provided at a position closer to one end side in the longitudinal direction of the housing portion, a third hole capable of accommodating the cylindrical portion may be provided at a position closer to the other end side in the longitudinal direction of the housing portion, the first chamber may be formed by the first hole, the second chamber may be formed by the second hole, and a cross section in the longitudinal direction of the third hole may be a portion where a cross section in the longitudinal direction of the first hole overlaps a cross section in the longitudinal direction of the second hole.

In the fluid sterilizer, the cylindrical portion may be made of a fluororesin.

Effect of the utility model

According to an aspect of the present invention, a small fluid sterilizing device having an LED as an ultraviolet light source can be provided.

Drawings

Fig. 1 is a cross-sectional view showing an example of a fluid sterilizing apparatus to which the fluid sterilizing apparatus of the present invention is applied.

Fig. 2 is an enlarged longitudinal sectional view of the housing.

Fig. 3(a) is an enlarged vertical sectional view of the cylindrical portion, and fig. 3(B) is a side view of the cylindrical portion viewed in the axial direction.

Fig. 4 is a side view of the plate material as viewed in the axial direction of the cylindrical portion.

Fig. 5(a) is an enlarged longitudinal sectional view of the cap, and fig. 5(B) is a side view of the cap viewed in the axial direction.

Description of the reference numerals

1. A housing portion; 2. a cover; 3. a cylindrical portion; 4. an inflow section; 5. an outflow section; 6. a plate material; 7. an open pore; 8. a light emitting element; 9. 11, 12 and O-shaped sealing rings; 21a, a communication port; 21b, a groove; 22b, a step portion; 23b, a groove; 26. a first chamber; 27. a second chamber; 28. a small diameter part; 29. a large diameter portion; 30. a seat hole; 31. an inflow portion mounting hole; 32. an outflow portion mounting hole; 33. a fastening part; 34. a first opening portion; 35. a second opening portion; 37. an indentation.

Detailed Description

Next, embodiments of the present invention will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are denoted by the same or similar reference numerals. However, the drawings are schematic, and the relationship between the thickness and the planar size, the ratio of the thicknesses of the respective layers, and the like are different from those in the actual case. The embodiments described below are embodiments illustrating apparatuses and methods for embodying the technical idea of the present invention, and the technical idea of the present invention is not particularly limited to the following cases of materials, shapes, structures, arrangements, and the like of the components. The technical idea of the present invention can be modified in various ways within the technical scope defined by the claims.

As shown in fig. 1, the fluid sterilizing apparatus 100 includes a housing portion 1 as an external cylinder, a light emitting element 8, an inflow portion 4, and an outflow portion 5. A cylindrical cavity is formed inside the housing section 1 in the longitudinal direction (i.e., the axial direction of the housing section 1, the left-right direction in fig. 1). The fluid flows from the outside into the casing 1 through the inflow portion 4, and flows out from the inside of the casing 1 to the outside through the outflow portion 5.

As shown in fig. 1, the fluid killing apparatus 100 further includes: a cylindrical portion 3 as an internal cylinder which is housed in the cavity of the housing portion 1, is formed in a cylindrical shape with both ends open, and has a treatment flow path formed therein extending in the longitudinal direction, i.e., the axial direction thereof; a first chamber 26 that communicates the inflow portion 4 with a first opening 34 located on the upstream side, i.e., the left side in fig. 1, of the treatment flow path of the cylindrical portion 3; and a second chamber 27 extending in the axial direction of the housing section 1 at a position different from the first chamber 26 in the housing section 1, and communicating the outflow section 5 with a second opening 35 of the treatment flow path of the cylindrical section 3 located on the downstream side in the fluid flow direction from the first opening 34.

As shown in fig. 2, the cavity of the housing portion 1 is formed in a multi-stage structure, and an inlet portion mounting hole 31 for mounting the inlet portion, a first chamber 26, a small diameter portion 28, a large diameter portion 29, and a seat hole 30 for mounting the light emitting element are provided in this order from the inlet portion side toward the light emitting element side, and the cylindrical portion 3 is mounted in the range of two portions, the small diameter portion 28 and the large diameter portion 29. The cross-sectional area of the first chamber 26 taken along a plane perpendicular to the longitudinal direction becomes larger as it goes toward the plate 6. This prevents the fluid from flowing into the treatment channel from the inflow portion through the first chamber 26 at a flow velocity that is too high to affect the killing effect.

The maximum diameter of the first chamber 26 is smaller than the diameter of the small diameter portion 28 and a stepped portion is formed therebetween to stop the cylindrical portion 3 (or the plate 6). An outflow portion mounting hole 32 for mounting the outflow portion is formed in the second chamber 27 at a position close to the outflow portion, and the outflow portion mounting hole 32 and the inflow portion mounting hole 31 are opened from an end surface of the case portion 1 on the side away from the light emitting element 8. The second chamber 27 communicates with the processing flow path of the cylindrical portion 3 inside the housing portion 1. As shown in fig. 2, by making the second chamber 27 extend long in the axial direction of the housing section 1 and open at the left end face of the housing section 1 in fig. 2, instead of the side peripheral wall of the housing section 1, the shape of the housing section 1 can be made neat, facilitating the installation and use of the fluid sterilizing device 100. Further, by positioning the outlet portion mounting hole 32 and the inlet portion mounting hole 31 on the same side of the housing portion 1, it is possible to simplify the hole forming operation and the mold releasing operation, and it is also convenient to attach and detach the inlet portion 4, the outlet portion 5, and the like to connect external pipes.

In addition, regarding the position where the second chamber 27 is provided in the housing portion 1, when viewed in the axial direction of the housing portion 1, the portion where the second chamber 27 overlaps the large diameter portion 29 located on the second opening portion 35 side serves as a passage for connecting the process flow path and the second chamber, and thus, even when the housing portion 1 is manufactured by injection molding or machining such as drilling, the passage for connecting the process flow path and the second chamber can be easily formed. In the case of forming the housing part 1 by injection molding, the passage can be formed directly after demolding, and in the case of forming the housing part 1 by machining such as boring, the passage can be formed directly by boring. Therefore, it is not necessary to form a passage connecting the process flow path and the second chamber by separate processing, and thus the member forming process can be simplified, and the labor of the operator can be saved and the manufacturing cost can be reduced.

At least a part of the outer peripheral surface of the cylindrical portion 3 can be inserted into the small diameter portion 28 of the housing portion 1. At least one plate material 6 is interposed between the end surface of the cylindrical portion 3 on the first opening 34 side and the case portion 1. As shown in fig. 5, the plate material 6 is provided with a plurality of open holes 7. This further reduces the flow velocity of the fluid passing through the treatment flow path, and enables the fluid to form a uniform and stable flow after passing through each opening hole 7, thereby enabling the sterilization treatment to be performed sufficiently, uniformly, and stably. Further, in a state where the cylindrical portion 3 is in contact with the step portion on the upstream side of the small diameter portion 28 via the plate member 6, the end surface of the cylindrical portion 3 on the second opening portion 35 side is substantially flush with the basal surface of the seat hole 30 of the housing portion 1.

The cylindrical portion 3 is formed in a cylindrical shape with both ends open, and preferably has a wall thickness of 1mm to 20 mm. At least the inner wall surface of the cylindrical portion 3 is formed of an ultraviolet reflective material having a diffuse transmittance of 1%/1 mm or more and 20%/1 mm or less and a total reflectance in the ultraviolet region of 80%/1 mm or more and 99%/1 mm or less. Preferably, the sum of the diffusion transmittance and the total reflectance in the ultraviolet region is 90%/1 mm or more. As a result, the light emitted from the light emitting element 8 into the cylindrical portion 3 can be absorbed by the inner wall surface of the cylindrical portion 3, and the fluid can be subjected to the sterilization treatment after being reflected, whereby the sterilization effect can be improved, and as the ultraviolet-reflecting material applied to the cylindrical portion 3, there can be mentioned a material including at least one of polytetrafluoroethylene (polytetrafluoroethylene PTFE), silicone resin, quartz glass containing bubbles of 0.05 μm or more and 10 μm or less in the inside, partially crystallized quartz glass containing crystal grains of 0.05 μm or more and 10 μm or less in the inside, alumina sintered body of 0.05 μm or more and 10 μm or less crystal grains, mullite sintered body of 0.05 μm or more and 10 μm or less crystal grains, and the like.

The plate material 6 is made of an ultraviolet-reflective material such as PTFE. As shown in fig. 5, the plate material 6 has a plurality of open holes 7 passing through between the front and back surfaces, and the opening ratio is set to 0.05 or more and 0.8 or less. The equivalent diameter of each opening 7 is 0.5mm or more and set to 1/3 or less of the equivalent inner diameter of the treatment channel.

By setting the aperture ratio to 0.05 or more and 0.8 or less, a rectifying effect can be obtained. That is, variations in the flow velocity of the fluid in the treatment channel can be suppressed. The aperture ratio is preferably 0.05 or more and 0.6 or less, and more preferably 0.05 or more and 0.35 or less. When the aperture ratio is less than 0.05, the maximum process flow rate with respect to the size of the process channel is small, and therefore the aperture ratio is preferably 0.05 or more.

Here, the plate member 6 is provided for the purpose of controlling the flow of the fluid flowing from the first chamber 26 into the processing flow path, but the plate member 6 is not limited thereto, and a flow regulating mechanism capable of regulating the flow may be provided. Further, as long as the required killing effect can be obtained, the flow regulating mechanism such as the plate material 6 is not necessarily provided.

The inner end of the outermost hole of the plate member 6 is smaller than the inner diameter of the treatment flow path. This enables all the holes provided in the plate material 6 to be used for the flow of fluid without unnecessary wasteful machining.

The light emitting element 8 is provided on the downstream side of the cylindrical portion 3 in the fluid flow direction, and irradiates the fluid passing through the treatment flow path with ultraviolet light.

A locking portion 33 for attaching the cover 2 is formed on the outer peripheral surface of the housing portion 1 on the side of the light emitting element 8. In a state where the plate material 6, the cylindrical portion 3, and the light emitting element 8 are sequentially incorporated into the cavity of the case portion 1, the cover 2 is fixed to the case portion 1 by the engaging portion 33 to keep pressing the light emitting element 8 in the axial direction, thereby preventing each member in the cavity from shaking in the axial direction. The outer diameter of the cover 2 is substantially the same as the outer diameter of the housing 1. As shown in fig. 5(a), a part of the inner periphery of the cap 2 is formed with a part that engages with the engaging part 33 of the housing part 1, and as shown in fig. 5(B), a plurality of indentations 37 are formed in a part of the outer periphery thereof, and as shown in fig. 5(B), the indentations 37 are formed in 4 numbers for an operator to use a tool to screw the cap 2 to the housing part 1, and in addition, the number of the indentations 37 is not limited to 4, and may be 3 or less or more than 4 as long as it matches the shape of the tool for screwing.

As shown in fig. 5, at least one groove 21b (2 is shown) is formed around the entire circumference of the outer circumferential surface of the cylindrical portion 3 on the first chamber 26 side. When the cylindrical portion 3 is inserted into the cavity of the housing portion 1, the O-ring 9 including an elastic member such as rubber is fitted into the groove 21b of the outer surface of the cylindrical portion 3 so that the first chamber 26 and the second chamber 27 are sealed after the cylindrical portion 3 is inserted into the cavity of the housing portion 1. The cross section of the groove 21b is, for example, rectangular in shape.

As shown in fig. 3(a) and 3(B), communication ports 21a penetrating the cylindrical portion 3 in the radial direction are formed at positions 6 spaced apart from each other by, for example, 60 degrees in the circumferential direction at the end portion of the cylindrical portion 3 on the light emitting element 8 side. By providing the communication port 21a as described above, the fluid can flow more uniformly and stably from the treatment flow path of the cylindrical portion 3 to the second chamber 27 through the communication port 21a, so that the fluid can flow through the treatment flow path to the maximum extent to be sufficiently sterilized, and turbulence in the cylindrical portion 3 due to uneven outflow of the fluid can be avoided, whereby a stable and uniform sterilizing effect can be provided, and vibration of the entire apparatus during the sterilizing process can be reduced. The arrangement position and the number of the communication ports 21a are not limited to these.

The shape of the communication port 21a is preferably a circular shape in cross section from the viewpoint of ease of machining. The shape of the communication port 21a is not limited to the case where the cross section is circular, and may be any shape. The diameter of the communication port 21a is preferably 1/100 or more and 1/4 or less, and more preferably 1/20 or more and 1/5 or less, of the diameter of the treatment channel.

Preferably, the communication port 21a is disposed at a position where a distance between the center position of the opening of the communication port 21a and the end of the processing flow path on the light emitting element 8 side is greater than or equal to 1/20 of the diameter of the processing flow path and less than or equal to the diameter of the processing flow path, and the end is on the side of the second opening 35 of the processing flow path. More preferably, the communication port 21a is disposed at a position where the amount of the end portion on the side of the second opening 35 of the treatment channel is equal to or greater than 1/10 and equal to or less than 1/4 of the diameter of the treatment channel.

As shown in fig. 1, an annular groove 23b into which the O-ring 11 is fitted is provided on an end surface of the cylindrical portion 3 facing the light emitting element 8, and the light emitting element 8 and the cylindrical portion 3 are sealed by the O-ring 11. An O-ring 12 is interposed between an end surface of the housing portion 1 facing the light emitting element 8 and the light emitting element 8 to seal therebetween. The cross section of the groove 23b is, for example, rectangular in shape.

The outer shell 1 is formed of, for example, polyolefin, specifically, polypropylene or polyethylene. As shown in fig. 1, a stepped portion 22b is formed in a portion of the inner peripheral surface of the large diameter portion 29 of the housing portion 1, which portion abuts on the seat hole 30.

The light emitting element 8 comprises quartz glass 13, an aluminum plate 4, an LED & PCB located between the quartz glass 13 and the aluminum plate 4. The quartz glass 13 is fitted into the seating hole 30 in such a manner as to be flush with the seating surface of the seating hole 30.

In order to suppress variation in the flow rate of the object in the treatment channel, it is preferable that the amount of change in the main cross-sectional area of the treatment channel from the end of the inner circumferential surface of the tubular portion 3 on the plate 6 side to the end of the inner circumferential surface of the tubular portion 3 on the light-emitting element 8 side, which is the most upstream portion of the treatment channel, is 5 [% ] or less. The treatment flow path may not be a cylinder.

In the above description of the case of killing the fluid, the fluid to be killed may be a liquid such as water, an aqueous solution, or a colloidal dispersion, or may be a gas such as air, ice, fixed fine powder, or the like.

While the embodiments of the present invention have been described above, the above embodiments are illustrative of an apparatus for embodying the technical idea of the present invention, and the technical idea of the present invention is not applied to the material, shape, structure, arrangement, and the like of specific structural parts. The technical idea of the present invention can be modified in various ways within the technical scope defined by the claims.

Claims

1. A fluid sterilizing device is characterized in that,

the fluid sterilizing device comprises:

a cylindrical portion forming a treatment flow path extending in a longitudinal direction; and

a housing portion that houses the cylindrical portion,

the housing part has an inflow part for allowing fluid to flow from the outside into the housing and an outflow part for allowing the fluid to flow out to the outside,

the fluid killing apparatus comprises:

a first chamber that communicates the inflow portion with a first opening portion of the processing flow path located on one end side in a longitudinal direction;

a second chamber that communicates the outflow portion with a second opening portion of the processing flow path located on the other end side in the longitudinal direction; and

a light emitting element provided on the other end side in the longitudinal direction of the treatment channel and configured to irradiate the fluid passing through the treatment channel with ultraviolet light,

the inflow portion and the outflow portion are both located near one end side in the longitudinal direction of the housing portion.

2. A fluid killing apparatus according to claim 1,

the fluid sterilizing device is provided with a sealing member that is provided between the cylindrical portion and the housing portion and seals between the first chamber and the second chamber.

3. A fluid disinfection apparatus as claimed in claim 1 or 2,

a communication port is provided in the vicinity of the other end side in the longitudinal direction of the cylindrical portion,

the processing flow path communicates with the second chamber only via the communication port.

4. A fluid disinfection apparatus as claimed in claim 1 or 2,

the amount of change in the main cross-sectional area of the treatment channel from one end side in the longitudinal direction to the other end side in the longitudinal direction is 5% or less.

5. A fluid disinfection apparatus as claimed in claim 1 or 2,

the first chamber and the processing flow path are connected via a communication path, the communication path is more than 1 plate material provided with a plurality of holes,

the plate material has an aperture ratio of 0.05 to 0.8 inclusive over the entire area of the plate material.

6. A fluid killing apparatus according to claim 5,

the inner end of the outermost hole of the plate material is smaller than the inner diameter of the treatment flow path.

7. A fluid killing apparatus according to claim 5,

the cross-sectional area of the first chamber, which is cut along a plane perpendicular to the longitudinal direction, becomes larger toward the plate.

8. A fluid disinfection apparatus as claimed in claim 1 or 2,

a second hole and a first hole having a smaller diameter than the cylindrical portion are provided in a position closer to one end side in the longitudinal direction of the housing portion, a third hole capable of housing the cylindrical portion is provided in a position closer to the other end side in the longitudinal direction of the housing portion,

the first chamber is constituted by the first orifice, the second chamber is constituted by the second orifice,

the cross section of the third hole in the longitudinal direction is a portion where the cross section of the first hole in the longitudinal direction overlaps with the cross section of the second hole in the longitudinal direction.

9. A fluid disinfection apparatus as claimed in claim 1 or 2,

the cylindrical portion is made of fluororesin.