WO2018212096A1

WO2018212096A1 - Filtration device

Info

Publication number: WO2018212096A1
Application number: PCT/JP2018/018355
Authority: WO
Inventors: 萬壽　優; 順子渡邉; 近藤　孝志
Original assignee: 株式会社村田製作所
Priority date: 2017-05-19
Filing date: 2018-05-11
Publication date: 2018-11-22
Also published as: JP2020142157A

Abstract

This filtration device is provided with: a flow-channel member in which a fluid flows; a filtration filter that filters an object in the fluid to be filtered; and a holding tool by which the filtration filter attached to the flow-channel member. The flow-channel member has a first flow channel into which a fluid flows and a second flow channel that extends in the different direction from the first flow channel, and a discharge port for discharging the fluid is provided at a part where the first flow channel and the second flow channel are connected to each other. The first flow channel is provided in the direction that crosses an opening surface of the discharge port, and the holding tool is attached to the flow-channel member such that the filtration filter is located at the discharge port of the flow-channel member.

Description

Filtration device

The present invention relates to a filtration device for filtering a filtration object contained in a fluid.

Recently, for example, what is described in Patent Document 1 is known as a filtering device. In the filtration device disclosed in Patent Literature 1, a branch pipe is attached to a branch portion set in the main pipe via a strainer. In the filtration device, the strainer prevents floating substances contained in the flow of the main pipe from entering the branch pipe.

JP-A-57-167712

However, the filtration device of Patent Document 1 still has room for improvement from the viewpoint of suppressing fluid leakage.

An object of the present invention is to solve the above-described problem and provide a filtration device that suppresses fluid leakage.

The filtration device according to one embodiment of the present invention includes:
A flow path member through which a fluid flows;
A filtration filter for filtering an object to be filtered contained in the fluid;
A holder in which the filtration filter is attached to the flow path member;
With
The flow path member includes a first flow path into which the fluid flows and a second flow path that extends in a direction different from the first flow path, and the first flow path and the second flow path include The connected part is provided with a discharge port for discharging the fluid,
The first flow path is provided in a direction intersecting the opening surface of the discharge port,
The holder is attached to the flow path member so that the filtration filter is located at the discharge port of the flow path member.

According to the present invention, fluid leakage can be suppressed in the filtration device.

The front view of the filtration apparatus of Embodiment 1 which concerns on this invention The top view of the filtration apparatus of Embodiment 1 which concerns on this invention Enlarged sectional view of the A1 portion of the filtration device of FIG. The schematic block diagram of the filtration filter of Embodiment 1 which concerns on this invention before pinching with a holder Partial enlarged perspective view of the filtration filter according to the first embodiment of the present invention before being clamped by the holder Schematic of a part of the filtration filter of FIG. 4 as seen from the thickness direction Schematic configuration diagram of a modified filtration device Schematic configuration diagram of another modification of the filtration device

(Knowledge that became the basis of the present invention)
In the cross-flow type filtration device, a discharge port is provided on a side surface of the flow channel inside the flow channel member, and a filtration filter is attached to the discharge port by a holder. The filtration filter is attached in parallel to the direction of fluid flow in the flow path. In such a filtering device, in order to flow the fluid flowing in the flow path to the discharge path through the discharge port, the pressure in the flow path is made larger than the pressure in the discharge path.

When the pressure in the flow path is increased, the inventors increase the pressure difference between the flow path and the outside of the flow path, so that fluid may leak from the joint between the flow path member and the holder. I found it.

In view of this, the present inventors provide a discharge port in a portion of the flow path member where the first flow path and the second flow path are connected, and the first flow path intersects the opening surface of the discharge port. It has been found that the fluid flowing in the first flow path can easily flow to the discharge port by being provided in the direction in which the first flow path is provided. Thus, it has been found that by reducing the pressure in the flow path, the pressure difference between the flow path and the outside of the flow path can be reduced, and fluid leakage can be suppressed.

Based on these points, the present inventors have reached the following invention.

The filtration device according to one embodiment of the present invention is
A flow path member through which a fluid flows;
A filtration filter for filtering an object to be filtered contained in the fluid;
A holder in which the filtration filter is attached to the flow path member;
With
The flow path member includes a first flow path into which the fluid flows and a second flow path that extends in a direction different from the first flow path, and the first flow path and the second flow path include The connected part is provided with a discharge port for discharging the fluid,
The first flow path is provided in a direction intersecting the opening surface of the discharge port,
The holder is attached to the flow path member so that the filtration filter is located at the discharge port of the flow path member.

With such a configuration, it is possible to easily flow the fluid flowing through the first flow path to the discharge port, and thus it is possible to suppress leakage of the fluid from the joint between the flow path member and the holder.

In the filtration device, the first flow path may be inclined at an acute angle with respect to the opening surface of the discharge port.

With such a configuration, leakage of fluid from the joint between the flow path member and the holder can be further suppressed.

In the filtration device, the flow path member has a first surface provided with the discharge port,
The holder has a second surface to which the filtration filter is attached;
The holder may be attached to the flow path member with the second surface of the holder being brought into surface contact with the first surface of the flow path member.

With such a configuration, since the seam can be formed by bringing the first surface of the flow path member into contact with the second surface of the holder, leakage of the fluid can be further suppressed.

In the filtration device, the flow path member has a third flow path surrounded by a portion where the first flow path and the second flow path are connected, and the filtration filter,
The outlet is provided in the third flow path;
The channel cross-sectional area of the third channel may be smaller than the channel cross-sectional area of the first channel.

With such a configuration, the flow rate of the fluid flowing through the third flow path can be increased, and clogging of the filtration filter can be suppressed.

In the filtration device, the holder may be attached to the flow path member such that a plurality of the filtration filters are located at the discharge port of the third flow path.

With such a configuration, since there are a plurality of filtration filters, it is possible to more efficiently filter the filtration object contained in the fluid.

In the filtration device, the first flow path and the second flow path may be formed symmetrically about a portion where the first flow path and the second flow path are connected.

Such a configuration can improve convenience.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In each drawing, each element is exaggerated for easy explanation.

(Embodiment 1)
[overall structure]
1A and 1B show a front view and a plan view, respectively, of the filtration device 10 according to the first embodiment of the present invention. FIG. 2 shows an enlarged cross-sectional view of the A1 portion of the filtration device 10 of FIG. The X, Y, and Z directions in FIGS. 1A, 1B, and 2 indicate the horizontal direction, vertical direction, and height direction of the filtration device 10, respectively. As shown in FIGS. 1A and 2, the filtration device 10 includes a flow path member 20, a filtration filter 30, and a holder 40. In the filtration device 10, a holder 40 to which the filtration filter 30 is attached is attached to the flow path member 20 by a fixture 50.

<Flow channel member>
As shown in FIGS. 1A and 1B, the flow path member 20 is a rectangular parallelepiped block member provided with a flow path through which a fluid flows. As shown in FIG. 2, the flow path member 20 includes a first flow path 21 and a second flow path 22 that extends in a direction different from the first flow path 21. Further, the flow path member 20 is provided with a discharge port 24 for discharging the filtered fluid at a portion where the first flow path 21 and the second flow path 22 are connected. In the first embodiment, the third flow path 23 is provided in the flow path member 20 where the first flow path 21 and the second flow path 22 are connected. The discharge port 24 is provided in the third flow path 23.

The 1st flow path 21 is a flow path into which the fluid containing the filtration target object flows. In the first embodiment, the first flow path 21 is inclined at an acute angle with respect to the opening surface (XY plane) of the discharge port 24. Specifically, the first flow path 21 is inclined at an angle θ _{1 in the} + Z direction with respect to the opening surface (XY plane) of the discharge port 24. Here, the angle θ ₁ is an angle larger than 0 degree and smaller than 90 degrees. The shape of the first flow path 21 is, for example, a circular pipe shape having a diameter of 6 mm.

In the present specification, the filtration target means a biological substance contained in the fluid. The “biological substance” means a substance derived from a living organism such as a cell (eukaryotic organism), a bacterium (eubacteria), or a virus. Examples of cells (eukaryotes) include artificial pluripotent stem cells (iPS cells), ES cells, stem cells, mesenchymal stem cells, mononuclear cells, single cells, cell masses, suspension cells, adhesive cells, nerves. Includes cells, leukocytes, cells for regenerative medicine, autologous cells, cancer cells, circulating cancer cells (CTC), HL-60, HELA, and fungi. Examples of bacteria (true bacteria) include Escherichia coli and tuberculosis. “Fluid” means a liquid. In the first embodiment, the fluid means a cell culture medium, and the filtration target means a cell (eukaryote).

The second flow path 22 is a flow path through which a fluid containing the filtration target object flows, and extends in a direction different from that of the first flow path 21. In the first embodiment, the second flow path 22 is inclined at an acute angle with respect to the opening surface (XY plane) of the discharge port 24. The shape of the second channel is, for example, a circular tube shape with a diameter of 6 mm.

The discharge port 24 is provided in a portion where the first flow path 21 and the second flow path 22 are connected, and is a hole for discharging the fluid flowing inside the flow path member 20 to the outside. The opening surface of the discharge port 24 is provided so as to intersect the direction in which the first flow path 21 extends. In the first embodiment, the flow path member 20 has the first surface 25 on the side where the holder 40 is attached. The first surface 25 is, for example, a flat wall surface. The discharge port 24 is provided in the third flow path 23 and is provided in the first surface 25 of the flow path member 20. A filtration filter 30 is disposed at the outlet 24. The discharge port 24 has a size to which the filtration filter 30 can be attached.

The third flow path 23 is a flow path that connects the first flow path 21 and the second flow path 22. Specifically, the third flow path 23 is formed by a portion surrounded by the part where the first flow path 21 and the second flow path 22 are connected and the filtration filter 30. More specifically, the third flow path 23 is a portion where the first flow path 21 and the second flow path 22 are connected, and is concave from the first surface 25 toward the inside of the flow path member 20. It is formed with a recessed portion. At least a part of the side wall of the third flow path 23 is formed by the filtration filter 30 disposed in the discharge port 24. In the first embodiment, the third flow path 23 is formed along the first surface 25 of the flow path member 20. That is, the third flow path 23 extends in the X direction. In the third flow path 23, one end is connected to the first flow path 21 and the other end is connected to the second flow path 22. Further, the channel cross-sectional area of the third channel 23 is smaller than the channel cross-sectional areas of the first channel 21 and the second channel 22. The shape of the third flow path is, for example, a rectangular shape having a length in the X direction of 42.2 mm and a cross section perpendicular to the fluid flow direction (length in the Z direction) 1 mm × (length in the Y direction) 6 mm It is. In the present specification, the channel cross-sectional area refers to the cross-sectional area of the channel in a cross section perpendicular to the fluid flow direction.

In Embodiment 1, the first flow path 21, the second flow path 22, and the third flow path 23 are formed on the same plane (XZ plane). Further, the first flow path 21 and the second flow path 22 are formed symmetrically with respect to a portion where the first flow path 21 and the second flow path 22 are connected. Specifically, as shown in FIG. 2, the first flow path 21 and the second flow path 22 are left and right with respect to a center line C1 passing through the center of the discharge port 24 provided in the third flow path 23. It is formed symmetrically.

The material of the flow path member 20 is, for example, polycarbonate, polyacetal, or acrylic.

<Filtration filter>
The filtration filter 30 is a filter that filters an object to be filtered included in the fluid. The filtration filter 30 is attached to the discharge port 24 of the flow path member 20. In Embodiment 1, the filtration filter 30 is a metal porous film.

FIG. 3 is a plan view showing a schematic configuration of the filtration filter 30. FIG. 4 is an enlarged perspective view of a part of the filtration filter 30. The X, Y, and Z directions in FIGS. 3 and 4 correspond to the X, Y, and Z directions in FIG. 2, and indicate the horizontal direction, vertical direction, and thickness direction of the filter 30, respectively. 3 and 4 show the filtration filter 30 before being held by the holder 40. FIG. As shown in FIG. 3, the filtration filter 30 includes a filter portion 31 and a frame portion 32 provided on the outer periphery of the filter portion 31. As shown in FIG. 4, the filtration filter 30 has a first main surface PS1 and a second main surface PS2 that face each other. In the first embodiment, as shown in FIG. 2, the first main surface PS 1 of the filtration filter 30 is flush with the first surface 25 of the flow path member 20. The filter part 31 includes a filter base part 34 in which a plurality of through holes 33 penetrating the first main surface PS1 and the second main surface PS2 are formed.

The material constituting the filter base portion 34 forming the base portion of the filter 30 is mainly composed of metal and / or metal oxide. The filter base 34 may be, for example, gold, silver, copper, platinum, nickel, palladium, an alloy thereof, or an oxide thereof.

The outer shape of the filtration filter 30 is, for example, a circle, a rectangle, or an ellipse. In the first embodiment, the outer shape of the filtration filter 30 is substantially circular. In the present specification, “substantially circular” means that the ratio of the length of the major axis to the length of the minor axis is 1.0 or more and 1.2 or less.

The filter part 31 is a plate-like structure in which a plurality of through holes 33 are formed. The shape of the filter unit 31 is, for example, a circle, a rectangle, or an ellipse. In the first embodiment, the shape of the filter unit 31 is substantially circular.

FIG. 5 is a schematic view of a part of the filter unit 31 as viewed from the thickness direction (+ Z direction). As shown in FIG. 5, the plurality of through holes 33 are periodically arranged on the first main surface PS1 and the second main surface PS2 of the filter unit 31. Specifically, the plurality of through holes 33 are provided at regular intervals in a matrix in the filter portion 31.

In Embodiment 1, the through-hole 33 has a square shape when viewed from the first main surface PS1 side of the filter portion 31, that is, the + Z direction. The through hole 33 is not limited to a square shape when viewed from the + Z direction, and may be a rectangular shape, a circular shape, or an elliptical shape, for example.

In Embodiment 1, the shape (cross-sectional shape) of the through-hole 33 projected on a surface perpendicular to the first main surface PS1 of the filter portion 31 is a rectangle. Specifically, the cross-sectional shape of the through hole 33 is a rectangle in which the length of one side in the radial direction of the filtration filter 30 is longer than the length of one side in the thickness direction of the filtration filter 30. The cross-sectional shape of the through-hole 33 is not limited to a rectangle, and may be, for example, a tapered shape such as a parallelogram or a trapezoid, a symmetric shape, or an asymmetric shape. .

In the first embodiment, the plurality of through holes 33 are arranged in two arrangement directions parallel to each side of the square when viewed from the first main surface PS1 side (+ Z direction) of the filter unit 31, that is, the X direction in FIG. They are provided at equal intervals in the Y direction. Thus, by providing the plurality of through holes 33 in a square lattice arrangement, the aperture ratio can be increased, and the passage resistance of the fluid to the filter 30 can be reduced. With such a configuration, the processing time can be shortened and the stress on the cells can be reduced.

Note that the arrangement of the plurality of through holes 33 is not limited to a square lattice arrangement, and may be, for example, a quasi-periodic arrangement or a periodic arrangement. As an example of the periodic array, as long as it is a square array, a rectangular array in which the intervals in the two array directions are not equal may be used, or a triangular lattice array or a regular triangular lattice array may be used. In addition, the through-hole 33 should just be provided with two or more by the filter part 31, and arrangement | positioning is not limited.

The interval between the through holes 33 is appropriately designed according to the type (size, form, property, elasticity) or amount of cells to be separated. Here, the interval between the through holes 33 is, as shown in FIG. 5, the through holes 33 adjacent to the center of any through hole 33 when the through holes 33 are viewed from the first main surface PS 1 side of the filter portion 31. It means the distance b from the center. In the case of a periodic array structure, the interval b between the through holes 33 is, for example, larger than 1 side d of the through

hole

33 and 10 times or less, and preferably 3 times or less the side d of the through hole 33. Alternatively, for example, the aperture ratio of the filter unit 31 is 10% or more, and preferably the aperture ratio is 25% or more. With such a configuration, it is possible to reduce the passage resistance of the fluid to the filter unit 31. Therefore, the processing time can be shortened and stress on the cells can be reduced. The aperture ratio is calculated by (area occupied by the through hole 33) / (projected area of the first main surface PS1 when it is assumed that the through hole 33 is not vacant).

The thickness of the filter part 31 is preferably greater than 0.1 times the size of the through-hole 33 (one side d) and not more than 100 times. More preferably, the thickness of the filter portion 31 is greater than 0.5 times the size of the through-hole 33 (one side d) and not more than 10 times. With such a configuration, the resistance of the filtration filter 30 with respect to the fluid can be reduced, and the processing time can be shortened. As a result, stress on cells can be reduced.

In the filter part 31, it is preferable that 1st main surface PS1 with which the fluid containing the filtration target object contacts has a small surface roughness. Here, the surface roughness means an average value of the difference between the maximum value and the minimum value measured by a stylus type step gauge at any five locations on the first main surface PS1. In the first embodiment, the surface roughness is preferably smaller than the cell size, and more preferably less than half the cell size. In other words, the openings of the plurality of through holes 33 on the first main surface PS1 of the filter part 31 are formed on the same plane (XY plane). Moreover, the filter base | substrate part 34 which is a part in which the through-hole 33 is not formed among the filter parts 31 is connected, and is formed integrally. With such a configuration, adhesion of cells to the surface (first main surface PS1) of the filter unit 31 is reduced, and the resistance of the fluid can be reduced.

The through hole 33 of the filter part 31 communicates through a wall surface in which an opening on the first main surface PS1 side and an opening on the second main surface PS2 side are continuous. Specifically, the through hole 33 is provided so that the opening on the first main surface PS1 side can be projected onto the opening on the second main surface PS2 side. That is, when the filter unit 31 is viewed from the first main surface PS1 side, the through hole 33 is provided so that the opening on the first main surface PS1 side overlaps the opening on the second main surface PS2 side. In the first embodiment, the through hole 33 is provided such that the inner wall thereof is perpendicular to the first main surface PS1 and the second main surface PS2.

The frame portion 32 is provided on the outer periphery of the filter portion 31 and is a portion where the number of through holes 33 per unit area is smaller than that of the filter portion 31. The number of through holes 33 in the frame part 32 is 1% or less of the number of through holes 33 in the filter part 31. The thickness of the frame part 32 may be larger than the thickness of the filter part 31. With such a configuration, the mechanical strength of the filtration filter 30 can be increased.

The frame part 32 functions as a connection part that connects the filtration filter 30 and the holder 40. The frame 32 may display filter information (such as dimensions of the through hole 33).

The frame portion 32 is formed in a ring shape when viewed from the first main surface PS1 side of the filter portion 31. When the filtration filter 30 is viewed from the first main surface PS1 side, the center of the frame portion 32 coincides with the center of the filter portion 31. That is, the frame part 32 is formed concentrically with the filter part 31.

<Holding tool>
The holder 40 is a jig in which the filtration filter 30 is attached to the flow path member 20. As shown in FIGS. 1A and 1B, the holder 40 is attached to the flow path member 20 by a fixing tool 50 such as a screw. The holder 40 is attached to the flow path member 20 so that the filtration filter 30 is located at the discharge port 24 of the flow path member 20. That is, when the holder 40 is attached to the flow path member 20, the filtration filter 30 is disposed at the discharge port 24 of the flow path member 20. In the first embodiment, the holder 40 includes a first frame member 41 and a second frame member 42, and the frame portion 32 of the filtration filter 30 is sandwiched between the first frame member 41 and the second frame member 42. To do.

Further, a discharge path 44 through which the fluid filtered through the filter 30 is discharged is formed inside the second frame member 42 of the holder 40. The discharge path 44 communicates with the discharge port 24 of the flow path member 20.

Specifically, the holder 40 holds the filtration filter 30 as follows.

As shown in FIG. 2, the frame part 32 has a first bent part 32a, a second bent part 32b, and a corrugated part 32c.

The first bent portion 32a is a portion that bends the frame portion 32 toward the second main surface PS2 at an obtuse angle. The second bent portion 32b is located closer to the outer edge 32d of the frame portion 32 than the first bent portion 32a, and is a portion that bends the frame portion 32 in the direction opposite to the first bent portion 32a (first main surface PS1 side). is there. The first frame member 41 and the second frame member 42 sandwich a portion between the first bent portion 32a and the second bent portion 32b.

The wavy portion 32c is a portion located on the outer edge 32d side of the frame portion 32 with respect to the second bent portion 32b. The waved portion 32 c functions as a retaining member that prevents the filtration filter 30 from coming off the holder 40. The corrugated portion 32 c has a shape that undulates in the circumferential direction of the filtration filter 30.

A gap is provided between the first frame member 41 and the second frame member 42 on the outer edge 32d side of the frame portion 32 with respect to the second bent portion 32b. This gap prevents the undulating portion 32c from being compressed.

The holder 40 has a second surface 43 to which the filtration filter 30 is attached. Specifically, the second surface 43 is formed on the first frame member 41. The second surface 43 is, for example, a flat wall surface. With the holder 40 holding the frame portion 32 of the filtration filter 30, the filtration filter 30 is brought into surface contact with the first surface 25 of the flow path member 20 by bringing the second surface 43 of the holder 40 into surface contact. It is attached to the discharge port 24.

The joint between the flow path member 20 and the holder 40 is formed by surface contact between the second surface 43 and the first surface 25. For this reason, the joint of the flow path member 20 and the holder 40 has a structure with improved sealing performance. In the first embodiment, the joint between the flow path member 20 and the holder 40 is formed along the XY plane. Thereby, sealing performance can be further improved. In the present specification, the seam on the side where the first flow path 21 is formed is referred to as an upstream seam S1, and the seam on the side where the second flow path 22 is formed is referred to as a downstream seam S2. .

The upstream seam S1 is held outside the portion where the first flow path 21 and the third flow path 23 are connected (on the outer edge 32d side of the filter 30) and the first surface 25 of the flow path member 20. It is formed by bringing the second surface 43 of the tool 40 into surface contact. The upstream seam S 1 is formed on the side opposite to the direction D 1 of the fluid flowing from the first channel 21 to the third channel 23. For this reason, the fluid flowing from the first flow path 21 to the third flow path 23 is less likely to flow in the upstream seam S1.

The downstream seam S2 is held outside the portion where the third flow path 23 and the second flow path 22 are connected (on the outer edge 32d side of the filtration filter 30) and the first surface 25 of the flow path member 20. It is formed by bringing the second surface 43 of the tool 40 into surface contact.

Examples of the material of the first frame member 41 and the second frame member 42 include metals such as duralumin and aluminum, and resins such as polyethylene, polystyrene, polypropylene, polycarbonate, polyacetal, and polyetherimide.

[Operation]
Next, the operation of the filtration device 10 will be described. In the filtering device 10, the fluid containing the filtration target object flows from the first channel 21 in the channel member 20 to the second channel 22 through the third channel 23. At this time, the filtration device 10 filters the filtration object contained in the fluid by the filtration filter 30 attached along the third flow path 23. In Embodiment 1, in order to perform filtration efficiently, suction is performed from the discharge path 44 that discharges the filtered fluid.

Next, the flow of fluid in the filtration device 10 will be described.

The fluid containing the object to be filtered flows from the first flow path 21 toward the third flow path 23. The first flow path 21 is inclined with respect to the opening surface (XY plane) of the discharge port 24. For this reason, the fluid flowing in the first flow path 21 flows toward the discharge port 24 of the third flow path 23. As described above, in the filtration device 10, the fluid flowing from the first flow path 21 to the third flow path 23 flows toward the discharge port 24, so that the fluid can easily pass through the filtration filter 30.

Further, the upstream joint S1 is formed on the opposite side (reverse direction) to the direction D1 of the fluid flowing from the first flow path 21 to the third flow path 23. For this reason, it is difficult for the fluid flowing from the first flow path 21 to the third flow path 23 to flow into the upstream seam S1.

Next, the fluid flowing through the third flow path 23 flows to the discharge port 24 and passes through the filter 30 or flows toward the second flow path 22. In the first embodiment, suction is performed from the discharge path 44 side. Thereby, in the filtration apparatus 10, the fluid flowing through the third flow path 23 is further easily passed through the filtration filter 30.

Thus, in the filtration device 10, a part of the fluid flowing through the third flow path 23 is discharged from the discharge port 24 through the filtration filter 30 due to the inclination of the first flow path 21 and suction from the discharge path 44 side. Is flowing.

Further, in the first embodiment, the fluid flowing through the third flow path 23 is actively flowing toward the discharge path 44 by suction from the discharge path 44 side. In the flow path 23, the pressure of the fluid can be reduced. Specifically, the pressure of the fluid flowing from the third channel 23 toward the second channel 22 can be made smaller than the pressure of the fluid flowing from the first channel 21 toward the third channel 23. . Thereby, since the pressure difference between the inside of the flow path and the outside of the flow path can be reduced, the fluid flowing from the third flow path 23 toward the second flow path 22 is unlikely to leak from the downstream seam S2.

[effect]
According to the filtration device 10 according to the first embodiment, the following effects can be obtained.

In the filtration device 10, the flow path member 20 connects the first flow path 21, the second flow path 22 extending in a direction different from the first flow path 21, and the first flow path 21 and the second flow path 22. And a third flow path 23. The third flow path 23 is provided with a discharge port 24, and the first flow path 21 is provided in a direction intersecting the opening surface of the discharge port 24. The holder 40 is attached to the flow path member 20 so that the filtration filter 30 is located at the discharge port 24 of the flow path member 20.

With such a configuration, the direction of the fluid flowing from the first flow path 21 into the third flow path 23 has a directional component toward the discharge port 24. That is, according to the filtering device 10, the fluid flowing from the first flow path 21 to the third flow path 23 can be flowed toward the discharge port 24. For this reason, in the filtration device 10, the fluid can be passed through the filtration filter 30 without increasing the pressure of the fluid in the flow channel of the flow channel member 20 as compared with the device shown in Patent Document 1. Thereby, the pressure difference between the inside of the flow path and the outside of the flow path can be reduced, and leakage of fluid from the joint between the flow path member 20 and the holder 40 can be suppressed.

Further, the first flow path 21 is formed at an acute angle with respect to the opening surface (XY plane) of the discharge port 24. With such a configuration, fluid leakage from the joint between the flow path member 20 and the holder 40 can be further suppressed.

In the filtering device 10, the holder 40 is attached to the flow path member 20 by bringing the second surface 43 of the holder 40 into surface contact with the first surface 25 of the flow path member 20.

With such a configuration, the joint between the flow path member 20 and the holder 40 can be formed by surface contact, and the sealing performance can be improved. For this reason, in the filtration apparatus 10, it can seal between the flow path member 20 and the holder 40, without using a sealing member. Thereby, the number of members of the filtration apparatus 10 can be reduced, and contamination by members can be suppressed.

Further, the upstream seam S1 is outside the portion where the first flow path 21 and the third flow path 23 are connected (on the outer edge 32d side of the filtration filter 30), and the first surface 25 of the flow path member 20. And the second surface 43 of the holder 40 are brought into surface contact with each other. The upstream seam S 1 is formed on the side opposite to the direction D 1 of the fluid flowing from the first channel 21 to the third channel 23. For this reason, fluid leakage can be suppressed at the upstream seam S1.

Further, since the fluid easily flows from the third flow path 23 toward the discharge port 24, the pressure in the flow path from the third flow path 23 to the second flow path 22 can be reduced. For this reason, since the pressure difference between the inside of the flow path and the outside of the flow path can be reduced, fluid leakage can also be suppressed at the downstream seam S2.

The attachment of the holder 40 to the flow path member 20 is easily performed by a fixture 50 such as a screw. Since it is easy to attach and remove the flow path member 20 and the holder 40, the filtration filter 30 held by the holder 40 can be easily replaced.

In the filtration device 10, the flow path member 20 has a third flow path 23 surrounded by a portion where the first flow path 21 and the second flow path 22 are connected, and a filtration filter 30. The cross-sectional area of the three flow paths 23 is smaller than the cross-sectional area of the first flow path 21.

With such a configuration, the flow velocity of the fluid flowing in the third flow path 23 can be increased, and clogging of the filtration filter 30 due to the filtration target can be suppressed.

In the filtration device 10, the first flow path 21 and the second flow path 22 are symmetric with respect to a portion where the first flow path 21 and the second flow path 22 are connected.

Such a configuration can improve convenience. For example, since the first flow path 21 on the inflow side and the second flow path 22 on the outflow side can be used interchangeably, the fluid is allowed to flow from the second flow path 22 and flow out to the first flow path 21. Can be used.

Note that the present invention is not limited to the first embodiment, and can be implemented in various other modes. In the first embodiment, a third flow path 23 is provided in a portion where the first flow path 21 and the second flow path 22 are connected, and a discharge port 24 is provided in the third flow path 23. Although an example has been described, the present invention is not limited to this. As long as the discharge port 24 is provided in the portion where the first flow path 21 and the second flow path 22 are connected, another configuration may be used. That is, the third flow path 23 is not an essential configuration.

FIG. 6 shows a schematic configuration diagram of a modified filtration apparatus 10A. As shown in FIG. 6, the discharge port 24 may be provided in a portion between the first flow path 21 and the second flow path 22 of the flow path member 20a. That is, the discharge port 24 may be provided on an extension line of the first flow path 21. Even with such a configuration, leakage of fluid from the joint between the flow path member 20a and the holder 40 can be suppressed. Further, in the filtration device 10 A, the fluid flowing through the first flow path 21 can be directly flowed to the discharge port 24. For this reason, more fluid can be filtered in a short time.

In Embodiment 1, although the example using one filtration filter 30 was demonstrated, it is not limited to this. For example, in the filtration device 10, a plurality of filtration filters 30 may be used.

FIG. 7 shows a schematic configuration diagram of a modification of the filtration device 10B. As illustrated in FIG. 7, the holder 40 a of the filtration device 10 B may have a configuration in which a plurality of filtration filters 30 can be attached to the second surface 43. Thus, the holder 40 a may be attached to the flow path member 20 so that the plurality of filtration filters 30 are located at the discharge port 24 of the flow path member 20. Further, a plurality of discharge paths 44 corresponding to the plurality of filtration filters 30 may be provided in the second frame member 42a of the holder 40a. Thereby, in the filtration apparatus 10B, since it can filter from the several filtration filter 30, more fluid can be filtered in a short time.

In Embodiment 1, the example in which the third flow path 23 is formed along the first surface 25 of the flow path member 20 has been described, but the present invention is not limited to this. The third flow path 23 may be inclined with respect to the first surface 25 of the flow path member 20.

In Embodiment 1, the example in which the channel cross-sectional area of the third channel 23 is smaller than the channel cross-sectional areas of the first channel 21 and the second channel 22 has been described, but the present invention is not limited to this. The flow path cross-sectional area of the third flow path 23 may be the same as the flow path cross-sectional area of the first flow path 21 or the second flow path 22, or the flow of the first flow path 21 or the second flow path 22. It may be larger than the road cross-sectional area.

In Embodiment 1, the example in which the first flow path 21, the second flow path 22, and the third flow path 23 are formed on the same plane (XZ plane) has been described, but the present invention is not limited to this. The first flow path 21, the second flow path 22, and the third flow path 23 may be formed on different planes. For example, the first flow path 21 may be formed on the XZ plane and the second flow path 22 may be formed on the YZ plane.

In the first embodiment, an example is described in which the first flow path 21 and the second flow path 22 are formed symmetrically about a portion where the first flow path 21 and the second flow path 22 are connected. However, it is not limited to this. For example, the first flow path 21 and the second flow path 22 may be formed asymmetrically around a portion where the first flow path 21 and the second flow path 22 are connected.

In Embodiment 1, the example in which the filtration filter 30 is a metal porous film has been described, but the present invention is not limited to this. The filtration filter 30 may be any filter as long as it can filter the filtration target contained in the fluid, and may be another filter such as a membrane.

In Embodiment 1, the example in which the first main surface PS1 of the filtration filter 30 is flush with the first surface 25 of the flow path member 20 has been described, but the present invention is not limited to this. The first main surface PS1 of the filtration filter 30 and the first surface 25 of the flow path member 20 may be on different planes.

In the first embodiment, the holder 40 includes a first frame member 41 and a second frame member 42, and the frame portion 32 of the filtration filter 30 is sandwiched between the first frame member 41 and the second frame member 42. Although the example to do was demonstrated, it is not limited to this. The holding device 40 may have another configuration as long as the filtration filter 30 can be attached to the flow path member 20. For example, the filtration filter 30 and the holder 40 may be integrally formed.

In the first embodiment, the example in which the discharge path 44 through which the fluid filtered through the filter 30 is discharged is formed inside the second frame member 42 of the holder 40 is not limited to this. . The holder 40 may not be provided with the discharge path 44. For example, a member provided with the discharge path 44 may be attached to the holder 40.

In Embodiment 1, the example in which the holder 40 is attached to the flow path member 20 by the fixture 50 has been described, but the present invention is not limited to this. Any other configuration may be used as long as the filter 30 can be attached to the flow path member 20 by the holder 40. For example, the holder 40 and the flow path member 20 may be integrally formed without using the fixture 50.

In the first embodiment, examples of the shapes and sizes of the first flow path 21, the second flow path 22, the third flow path 23, the discharge port 24, and the filtration filter 30 are described, but the present invention is not limited to this. Moreover, the 1st flow path 21, the 2nd flow path 22, and the 3rd flow path 23 may be formed bent.

In Embodiment 1, the example in which suction is performed from the discharge path 44 for discharging the filtered fluid has been described, but the present invention is not limited to this. The filtering device 10 can achieve the effects of the first embodiment without performing suction from the discharge path 44.

In Embodiment 1, the example in which the fluid including the filtration target is a liquid has been described, but the present invention is not limited to this. For example, the fluid may be a gas.

In Embodiment 1, the example in which the joint between the flow path member 20 and the holder 40 is formed along the XY plane has been described, but the present invention is not limited to this. For example, at least a part of the joint between the flow path member 20 and the holder 40 may be formed as a curved surface. That is, at least a part of the first surface 25 of the flow path member 20 and the second surface 43 of the holder 40 may be formed as a curved surface. Also with such a configuration, leakage of fluid from the joint between the flow path member 20 and the holder 40 can be suppressed.

Although the present invention has been fully described in connection with preferred embodiments with reference to the accompanying drawings, various changes and modifications will be apparent to those skilled in the art. Such changes and modifications are to be understood as included within the scope of the present invention as long as they do not depart from the scope of the present invention.

Since the filtration device of the present invention can perform filtration while suppressing fluid leakage, it is useful for the application of filtering a fluid containing an object to be filtered.

DESCRIPTION OF

SYMBOLS

10, 10A,

10B Filtration apparatus

20, 20a Flow path member 21 1st flow path 22 2nd flow path 23 3rd flow path 24 Outlet 25 1st surface 30 Filtration filter 31 Filter part 32 Frame part 32a 1st bending part 32b 2nd bending part 32c Wave-like part 32d Outer edge 33 Through-hole 34 Filter base |

substrate part

40, 40a Holder 41

1st frame member

42, 42a 2nd frame member 43 2nd surface 44 Discharge path 50 Fixing tool PS1 1st main surface PS2 1st 2 Main surface S1 Upstream seam S2 Downstream seam

Claims

A flow path member through which a fluid flows;
A filtration filter for filtering an object to be filtered contained in the fluid;
A holder in which the filtration filter is attached to the flow path member;
With
The flow path member includes a first flow path into which the fluid flows and a second flow path that extends in a direction different from the first flow path, and the first flow path and the second flow path include The connected part is provided with a discharge port for discharging the fluid,
The first flow path is provided in a direction intersecting the opening surface of the discharge port,
The holder is attached to the flow path member so that the filtration filter is located at the discharge port of the flow path member.
Filtration device.
The first flow path is inclined at an acute angle with respect to the opening surface of the discharge port.
The filtration device according to claim 1.
The flow path member has a first surface on which the discharge port is provided,
The holder has a second surface to which the filtration filter is attached;
The holder is attached to the flow path member by bringing the second surface of the holder into surface contact with the first surface of the flow path member.
The filtration device according to claim 1 or 2.
The flow path member has a third flow path surrounded by a portion where the first flow path and the second flow path are connected, and the filtration filter,
The outlet is provided in the third flow path;
The flow path cross-sectional area of the third flow path is smaller than the flow path cross-sectional area of the first flow path,
The filtration device according to any one of claims 1 to 3.
The holder is attached to the flow path member such that a plurality of the filtration filters are located at the discharge port of the third flow path.
The filtration device according to claim 4.
The first flow path and the second flow path are formed symmetrically around a portion where the first flow path and the second flow path are connected.
The filtration device according to any one of claims 1 to 5.