Filter element and filter device

Abstract

A filter cartridge is required that fluid is readily diffused to the end of the filter element. A filter element is provided with: a filter material formed in the shape of a cylinder having a hollow section; the core body is in a long and thin shape, is inserted and embedded in the hollow part of the filter material in a manner of supporting the hollow part of the filter material, and is provided with a plurality of holes which are formed between the front surface and the back surface of the core body and are used for communicating the front surface and the back surface of the core body; the first end plate is connected with one end of the core body and one end of the filter material and seals one end of the core body; and a second end plate joined to the other end of the core and the other end of the filter material, the second end plate having an opening opened so as to communicate with the hollow portion of the core.

Description

Technical Field

[0001] This invention relates to filter cartridges that support filter media and filter devices. Background Technology

[0002] For example, such as Figure 1 As shown, a filter element 1 is known to be configured in the form of a filter container 5 that serves as a filter device. A filter element 15, which serves as a filter media, is built into the filter element 1, which serves as a filter support, and is fixed and supported on the filter element 1 in a removable or non-removable manner.

[0003] The filter container 5 has a first fluid port 51 and a second fluid port 52. The first fluid port 51 communicates with the outer surface of the filter element 15, and the second fluid port 52 communicates with the inner surface of the filter element 15.

[0004] For example, typically, the first fluid port 51 can serve as a fluid inlet, and the second fluid port 52 can serve as a fluid outlet. In this case, the fluid to be filtered is introduced into the interior of the filter container 5 through the first fluid port 51, passing upstream through the outer surface of the filter element 15 disposed on the filter cartridge 1, and downstream through the inner surface of the filter element 15, forming a flow that discharges the fluid from the second fluid port 52 to the exterior of the filter container 5. Conversely, the second fluid port 52 can also serve as a fluid inlet, and the first fluid port 51 as a fluid outlet. In this case, the fluid to be filtered is introduced into the interior of the filter container 5 through the second fluid port 52, passing upstream through the inner surface of the filter element 15 disposed on the filter cartridge 1, and downstream through the outer surface of the filter element 15, forming a flow that discharges the fluid from the first fluid port 51 to the exterior of the filter container 5. Hereinafter, in this specification, an example of the former, where the first fluid port 51 is a fluid inlet and the second fluid port 52 is a fluid outlet, will be described in the context of carrying out the invention according to the background of the invention. However, in the latter case, only the direction of flow is reversed, and everything else remains the same.

[0005] The filter element 15 is typically a hollow cylindrical shape. A hollow, cylindrical core 14 is disposed in the hollow portion of the filter element 15, and a cylindrical cover 11 is disposed on the outside of the filter element 15. The filter element 15 is supported by being sandwiched between the cover 11 and the core 14. A first end plate 12 and a second end plate 13 are respectively disposed at both ends of the filter element 15. The first end plate 12 and the second end plate 13 are fixed to the filter element 15, the cover 11, and the core 14 by welding or the like.

[0006] Existing technical documents

[0007] Patent documents

[0008] Patent Document 1: Japanese Patent Application Publication No. 2001-99775 Summary of the Invention

[0009] The problem that the invention aims to solve

[0010] As disclosed in Patent Document 1, in the integrity test for the normal performance of filtration, it is required that the filter element be thoroughly wetted with liquid.

[0011] For example, the diffusion test in the integrity test of filter element 15, represented by a membrane filter, is a test in which the upstream side of filter element 15 is pressurized to a specified test pressure by gas, and the diffusion flow rate of the gas is measured on the downstream side of filter element 15.

[0012] In diffusion tests, a prerequisite is that the entire filter must be completely wetted down to all corners of the filter element 15. However, the reduction in wettability of the filter element 15 is concentrated at the dead-end portion D at the end of the filter element 15. For example, as... Figure 5 As shown, in the flow FL of the filter element 1, where fluid flows from the outer periphery of the filter element 15 into the filter element 15 and flows out from the inner periphery of the filter towards the core 14, which serves as the central flow path, the flow force of the upper vertical flow FLU of the filter element 15 is weaker than that of the lower vertical flow FLb of the filter element 15 due to the longer flow distance. Consequently, the flow rate of the lower vertical flow FLb of the filter element 15 is greater than that of the upper vertical flow FLU. As a result, uniform flow throughout the entire filter element 15 cannot be achieved, and the fluid has difficulty spreading to the end 15a of the filter element 15. The reduction in the wettability of the filter media is concentrated at the dead end D at the end 15a of the filter element 15, making it difficult to ensure complete wettability.

[0013] The diffusion test is a manufacturing validation test for the filter, therefore, the filter element is not typically designed to ensure complete wettability of the dead end D up to the end of the filter element 15 solely for the purpose of the diffusion test.

[0014] Not limited to the case where a diaphragm is used as the filter element 15, generally speaking, a structure that allows fluid to easily diffuse to the dead end portion D at the end of the filter element 15, serving as the support for the filter element 15, is generally advantageous not only for diffusion tests but also for the filter element 15 itself. A structure that allows fluid to easily diffuse to the end of the filter element 15 is required.

[0015] Methods for solving problems

[0016] A filter element comprising: a filter material formed in the shape of a cylinder having a hollow portion; a core having an elongated shape having a hollow portion, inserted into the hollow portion of the filter material to support the hollow portion of the filter material, and having a plurality of holes between the inner and outer surfaces of the core to communicate between the inner and outer surfaces of the core; a first end plate engaged with one end of the core and one end of the filter material to seal one end of the core; and a second end plate engaged with the other end of the core and the other end of the filter material, having an opening communicating with the hollow portion of the core, wherein the one end of the core has a notch, the engagement of the one end of the core with the first end plate is the engagement of the end face of the core other than the notch with the first end plate, and the one end of the filter material and the hollow portion of the core are also in fluid communication via the notch.

[0017] A filter element comprising: a filter media formed in the shape of a cylinder having a hollow portion; a core body having an elongated shape, inserted into the hollow portion of the filter media to support the hollow portion, and having a plurality of holes communicating between the inner and outer surfaces of the core body; a first end plate engaging one end of the core body and one end of the filter media to seal one end of the core body; a second end plate engaging the other end of the core body and the other end of the filter media, having an opening; and a cylindrical flow path. It has a hollow flow path inside, which is arranged along the axial direction of the core in the hollow part of the core. One end of the cylindrical flow path is engaged with the first end plate and the other end is engaged with the second end plate. The space defined between the inner surface of the core and the outer surface of the cylindrical flow path is in fluid communication with the hollow flow path of the cylindrical flow path on the side of the cylindrical flow path at the one end, and is not in fluid communication with the hollow flow path of the cylindrical flow path on the side of the cylindrical flow path at the other end.

[0018] A filter element comprising: a filter material formed in the shape of a cylinder having a hollow portion; a core body having an elongated shape having a hollow portion, inserted into the hollow portion of the filter material to support the hollow portion, and having a plurality of holes communicating between the inner and outer surfaces of the core body; a first end plate engaging one end of the core body and one end of the filter material to seal one end of the core body; a second end plate engaging the other end of the core body and the other end of the filter material, having an opening; and a cylindrical flow path having a hollow flow path internally, the cylindrical flow path being arranged axially along the core body within the hollow portion of the core body, and one end of the cylindrical flow path being sealed to the first end plate. The first end of the core is joined to the second end plate in such a way that it forms a flow path connected to the hollow flow path of the cylindrical flow path through the opening of the second end plate. The first end of the core has a notch, and the engagement of the first end of the core with the first end plate is the engagement of the end face of the core other than the notch with the first end plate. The first end of the filter material and the hollow portion of the core are also fluidly connected through the notch. The space defined between the inner surface of the core and the outer surface of the cylindrical flow path is fluidly connected to the hollow flow path of the cylindrical flow path on the side of the first end of the cylindrical flow path, and is not fluidly connected to the hollow flow path of the cylindrical flow path on the other end of the cylindrical flow path.

[0019] A filter device having a filter element internally, wherein the filter element comprises: a filter material formed in the shape of a cylinder having a hollow portion; a core having an elongated shape having a hollow portion, inserted into the hollow portion of the filter material in a manner that supports the hollow portion of the filter material, and having a plurality of holes between the front and back of the core communicating between the front and back of the core; a first end plate engaging one end of the core and one end of the filter material to seal one end of the core; and a second end plate engaging the other end of the core and the other end of the filter material, having an opening communicating with the hollow portion of the core, the one end of the core having a notch, the engagement of the one end of the core with the first end plate being the engagement of the end face of the core other than the notch with the first end plate, and the one end of the filter material and the hollow portion of the core also being in fluid communication via the notch.

[0020] A filter device having an internal filter element, wherein the filter element comprises: filter media formed in the shape of a cylinder having a hollow portion; a core body having an elongated shape, inserted into the hollow portion of the filter media to support the hollow portion, and having a plurality of holes between the front and back of the core body communicating between the front and back; a first end plate engaging one end of the core body and one end of the filter media to seal one end of the core body; and a second end plate engaging the other end of the core body and the other end of the filter media, having... It has an opening; and a cylindrical flow path having a hollow flow path inside, the cylindrical flow path being arranged along the axial direction of the core in the hollow portion of the core, and one end of the cylindrical flow path engaging with the first end plate and the other end engaging with the second end plate, the space defined between the inner surface of the core and the outer surface of the cylindrical flow path being in fluid communication with the hollow flow path of the cylindrical flow path on the side of the cylindrical flow path at the one end, and not in fluid communication with the hollow flow path of the cylindrical flow path on the side of the cylindrical flow path at the other end.

[0021] A filter device having an internal filter element, wherein the filter element comprises: filter media formed in the shape of a cylinder having a hollow portion; a core body having an elongated shape having a hollow portion, inserted into the hollow portion of the filter media to support the hollow portion, and having a plurality of holes communicating between the inner and outer surfaces of the core body; a first end plate engaging one end of the core body and one end of the filter media to seal one end of the core body; a second end plate engaging the other end of the core body and the other end of the filter media, having an opening; and a cylindrical flow path having a hollow flow path internally, the cylindrical flow path being arranged axially along the core body within the hollow portion of the core body, and one end of the cylindrical flow path being sealed. The core is engaged with the first end plate in a manner that the other end is engaged with the second end plate in a manner that forms a flow path connected to the hollow flow path of the cylindrical flow path through the opening of the second end plate. One end of the core has a notch, and the engagement of one end of the core with the first end plate is the engagement of the end face of the core other than the notch with the first end plate. One end of the filter material and the hollow portion of the core are also fluidly connected through the notch. The space defined between the inner surface of the core and the outer surface of the cylindrical flow path is fluidly connected to the hollow flow path of the cylindrical flow path on the side of one end of the cylindrical flow path, and is not fluidly connected to the hollow flow path of the cylindrical flow path on the other end of the cylindrical flow path.

[0022] Invention Effects

[0023] According to the present invention, a filter element in which fluid can easily diffuse to the end of the filter element can be realized. Attached Figure Description

[0024] Figure 1 This is a conceptual diagram of a filter element and a filter device having the filter element according to an embodiment of the present invention.

[0025] Figure 2A This is a cross-sectional view of the filter element according to Embodiment 1 of the present invention.

[0026] Figure 2B This is an exploded perspective view of the portion of the filter element with a notch in the core of Embodiment 1 of the present invention.

[0027] Figure 2C This is a cross-sectional view of one end of the filter element in Embodiment 1 of the present invention, at a portion having a notch in the core body.

[0028] Figure 2D This is a cross-sectional view of the other end of the filter element according to Embodiment 1 of the present invention.

[0029] Figure 2E This is an exploded perspective view of the portion of the filter element with notches on the core and cover of the filter element according to Embodiment 1 of the present invention.

[0030] Figure 2F This is a cross-sectional view of the end of the filter element viewed from the axial direction in another embodiment of the filter element according to Embodiment 1 of the present invention, where the filter element has notches on the core and cover.

[0031] Figure 3A This is a cross-sectional view of the filter element according to Embodiment 2 of the present invention.

[0032] Figure 3B This is an exploded perspective view of one end portion of the cylindrical flow path of the filter element according to Embodiment 2 of the present invention.

[0033] Figure 3C This is a cross-sectional view of one end portion of the cylindrical flow path of the filter element according to Embodiment 2 of the present invention.

[0034] Figure 3D This is a cross-sectional view of the other end portion of the cylindrical flow path of the filter element according to Embodiment 2 of the present invention.

[0035] Figure 4A This is a cross-sectional view of the filter element according to Embodiment 3 of the present invention.

[0036] Figure 4B This is an exploded perspective view of one end portion of the cylindrical flow path of the filter element according to Embodiment 3 of the present invention.

[0037] Figure 5 This is a cross-sectional view of an existing filter cartridge. Detailed Implementation

[0038]

Implementation Method 1

[0039] Reference Figure 1 and Figures 2A to 2D The filter element 1 and the filter container (filter device) 5 are described below. Figure 1 This is a conceptual diagram of a filter element 1 and a filter container 5 having the filter element 1, according to an embodiment of the present invention. Figure 2A This is a cross-sectional view of filter element 1. Figure 2B This is an exploded 3D view of filter element 1. Figure 2C This is a cross-sectional view showing the end of filter element 1, representing the end 15a of filter element 1. Figure 2D It is shown Figure 2C The cross-sectional view of the end of filter element 1 on the opposite side of one end 15a, i.e., the other end 15b. Figure 2C yes Figure 2A A magnified view of the top side. Figure 2D yes Figure 2A A magnified view of the lower side.

[0040] As already explained in the background of the invention, such as Figure 1 As shown, the filter element 1 of this invention is configured to be built into a filter container 5, which serves as a filter device. The filter container 5 has a first fluid port 51 and a second fluid port 52. Inside the filter element 1 is a filter element 15, which serves as a filter medium. The filter element 15 is built into the filter element 1, which serves as a filter support, and is fixed and supported on the filter element 1 in a detachable or non-detachable manner. The filter container 5 has a first fluid port 51 that communicates with the outer surface of the filter element 15 and a second fluid port 52 that communicates with the inner surface of the filter element 15.

[0041] Typically, the first fluid port 51 can be designated as the fluid inlet, and the second fluid port 52 as the fluid outlet. In this case, the fluid to be filtered is introduced into the interior of the filter container 5 through the first fluid port 51 and passes through the filter element 15, which serves as the filter media, disposed on the filter cartridge 1. Furthermore, a flow is formed in which the fluid is discharged from the second fluid port 52 to the outside of the filter container 5. Conversely, the second fluid port 52 can also be designated as the fluid inlet, and the first fluid port 51 as the fluid outlet. In this case, the fluid to be filtered is introduced into the interior of the filter container 5 through the second fluid port 52, passing upstream through the inner surface side of the filter element 15 disposed on the filter cartridge 1 and downstream through the outer surface side of the filter element 15, forming a flow in which the fluid is discharged from the first fluid port 51 to the outside of the filter container 5. Generally, the former uses a liquid as the fluid, and the latter uses a gas as the fluid. Hereinafter, in this specification, an example of the former, where the first fluid port 51 is the fluid inlet and the second fluid port 52 is the fluid outlet, will be described in accordance with the background of the invention. However, in the latter case, only the direction of flow is reversed, and everything else remains the same.

[0042] Typically, the filter element 1 must have a filter element 15 as filter media, a core 14, a first end plate 12, and a second end plate 13. As described later, the core 14 is a component that is inserted into the inner surface of the hollow portion inside the filter element 15 and supports the filter element 15 on the inner surface of the filter element 15.

[0043] The filter element 1 can be configured to additionally have a cover 11 in addition to the above. As will be described later, the cover 11 is disposed on the outer peripheral surface of the filter element 15 and is a component that supports the filter element 15 on the outer surface side of the filter element 15. Hereinafter, an example of configuring both the cover 11 and the core 14 will be described, but in the case of configuring only the core 14, it can be understood that the cover 11 is omitted from the following description.

[0044] The filter element 15, which serves as the filter media, is formed in the shape of a cylinder with a hollow portion. The filter element 15 is, for example, a membrane film. That is, the filter element 15 can be a membrane filter that is formed into a cylindrical shape by overlapping and folding the membrane film in the circumferential direction of the cylinder.

[0045] Alternatively, the filter element 15 can also be formed of a nonwoven fabric. In particular, a nanofiber nonwoven fabric is suitable. The filter element 15 can be a depth filter formed of a nonwoven fabric.

[0046] The core 14 is an elongated core extending along its length axis and having a hollow portion. The elongated shape of the core 14 is typically a cylindrical shape with a circular cross-section or a polygonal prism shape with a polygonal cross-section. The core 14 is inserted into the hollow portion of the filter element 15 in such a way that the inner surface of the hollow portion of the filter element contacts the core 14, thereby supporting the hollow portion of the filter element 15.

[0047] The core 14 is configured as a cylindrical wall component having a plurality of holes 14a that fluidly connect the inside and outside of the core 14.

[0048] The first end plate 12 engages with one end 14b of the core 14 and one end 15a of the filter element 15. For example, the first end plate 12 seals one end 14b of the core 14 such that the engagement of one end 14b of the core 14 with the first end plate 12 is such that the end face of one end 14b of the core 14, except for the notch 16a, is engaged with the first end plate 12.

[0049] The second end plate 13 is joined to the other end 14c of the core 14 on the opposite side of one end 14b of the core 14 and the other end 15b of the filter element 15. For example, the second end plate 13 has an opening 13a, the inner wall surface of the opening 13a of the second end plate 13 is joined to the outer surface of the other end 14c of the core 14, and the other end 14c of the core 14 passes through the opening 13a. Alternatively, in another embodiment, the other end 14c of the core 14 is joined in a mating state around the opening 13a of the second end plate 13 (not shown). Thus, the filter element communicates only with the hollow portion of the core 14 through the opening 13a of the second end plate 13, and the inner surface of the hollow portion of the filter element does not communicate directly with the outer surface of the second end plate 13, but only with the hollow portion of the core 14.

[0050] When the filter element 1 has a cover 11, the cover 11 is disposed on the outer surface side of the filter element 15, and the filter element 15 is inserted between the core 14 and the cover 11 in such a way that the filter element 15 is held between the core 14 and the cover 11 on the inner surface side of the filter element 15, and the filter element 15 is supported by the cover 11 and the core 14.

[0051] The filter element 1 of Embodiment 1 is characterized in that it has a notch 16a at one end 14b of the core body 14. The notch 16a is a shape that is concave from one end 14b of the core body 14 along the axial direction of the core body 14. Multiple notches 16a are formed in a manner that repeats in the circumferential direction perpendicular to the axial direction of the core body 14 at one end 14b. That is, the notch 16a at one end 14b of the core body 14 forms a concave end portion, and the portion other than the notch 16a forms a convex end portion along the circumference of one end 14b of the core body 14. Thus, one end 14b of the core body 14 is formed to alternately repeat the concave and convex shapes along the axial direction in the circumferential direction of the wall surface of the core body 14.

[0052] like Figure 2B As shown, the connection between one end 14b of the core 14 and the first end plate 12 is the connection between the convex end face of the core 14 (excluding the notch 16a) and the face of the first end plate 12. Furthermore, the outer surface of the filter element 15 is in fluid communication with the hollow portion of the core 14 via the notch 16a. That is, fluid flowing in from the outer surface of the filter element 15 passes through the filter element 15 and reaches the inner surface of the filter element 15, from where it flows into the core 14 through the hole 14a. In addition, the outer surface of the filter element 15 and the hollow portion of the core 14 are also in fluid communication via the notch 16a, allowing fluid to flow into the core 14 while in contact with the face of the first end plate 12 at the notch 16a.

[0053] Since one end 14b of the core 14 is sealed by the first end plate 12, the fluid flowing into the core 14 flows within the core 14 toward the opening 13a of the second end plate 13, reaching the fluid port at the end of the core 14 at the opening 13a. The fluid reaching the fluid port at the end of the core 14 at the opening 13a is discharged from the second fluid port 52 through the fluid port at the end of the core 14.

[0054] The effect of the notch 16a is as follows. The dead end D at one end 15a of the filter element 15 was previously a location where air could not flow out, fluid could not flow in, and fluid diffusion was difficult. Therefore, the filter element 15 at the dead end D was a location with poor wettability.

[0055] In this invention, at the dead end D of one end 15a of the filter element 15, fluid flow from the inner surface of the filter element 15 to the core 14 is also generated through the notch 16a, thus the fluid easily diffuses throughout the circumferential region of one end 15a of the filter element 15. Consequently, air trapped at one end 15a of the filter element 15 before fluid flow is generated flows out, the fluid inflow is increased, wettability is improved, and a uniform wetting effect is achieved in the circumferential direction.

[0056] In this embodiment, it is achieved by adding a notch 16a only at one end 14b of the core 14. However, it is also possible to provide a notch 16b at one end 11b of the cover 11. For this, see [reference needed]. Figure 2E and Figure 2F Please provide an explanation. Figure 2E This is a perspective view of the end side of the filter element 1 with the notch 16a of one end 14b of the core 14 disposed on one end 11b of the cover 11 and with the notch 16b disposed thereon. Figure 2F This is a cross-sectional view of the end of filter element 1 viewed from the axial direction of filter element 1, with the core 14 and cover 11 of filter element 1 having notches.

[0057] That is, the notch 16b at one end 11b of the cover 11 becomes a concave end, and the portion of one end 11b of the cover 11 other than the notch 16b becomes a convex end along the circumference of one end 11b of the cover 11. The notch 16b is a shape that is recessed from one end 11b of the cover 11 along the axial direction of the cover 11. Multiple notches 16b are formed in a manner that repeats in the circumferential direction of one end 11b of the cover 11 perpendicular to the axial direction of the cover 11. That is, the notch 16b at one end 11b of the cover 11 forms a concave end, and the portion other than the notch 16b forms a convex end along the circumference of one end 11b of the cover 11. Thus, one end 11b of the cover 11 is formed to alternately repeat the concave and convex shapes along the axial direction in the circumferential direction of the wall surface of the cover 11. Figure 2E As shown, the engagement between one end 11b of the cover 11 and the first end plate 12 is the engagement between the convex end face of the cover 11 (excluding the notch 16b) and the face of the first end plate 12.

[0058] When a notch 16a is provided at one end 14b of the core 14 and a notch 16b is provided at one end 11b of the cover 11, it is preferable that the notches 16 and 16b, which are concave ends, are arranged in a non-overlapping manner at a position with an arbitrary central angle α at a distance R from the center of the cover 11 and the core 14. If the notches 16 and 16b are arranged overlappingly at a position with an arbitrary central angle α at a distance R from the reference position, the flow of fluid in the radial direction of the filter element 15 becomes stronger, and the force of the flow of fluid diffusing circumferentially along the filter element 15 inside the filter element 1 decreases.

[0059] Similarly, it is preferable that the center of the cover 11 and the core 14 is located at an arbitrary central angle α from the reference position R, with one end 11b of the cover 11 and one end 14b of the core 14 arranged in a non-overlapping manner. If the one end 11b of the cover 11 and one end 14b of the core 14 overlap at an arbitrary central angle α from the reference position R, the flow to the filter element 15 disappears, and the force of the fluid diffusion along the circumferential direction of the filter element 15 within the filter element 1 decreases.

[0060] By arranging the notch 16 and notch 16b, which are concave ends, at a position at an arbitrary central angle α from an arbitrary reference position R, and by arranging the end 11b of the cover 11 as a convex end face and the end 14b of the core 14 as a convex end face, respectively, a flow of fluid diffuses circumferentially along the filter element 15 inside the filter element 1.

[0061]

Implementation Method 2

[0062] Next, refer to Figure 1 , Figures 3A to 3D The filter element 1 and filter container (filter device) 5 of Embodiment 2 will be described. Figure 1 The filter element 1 and the filter container 5 having the filter element 1 shown in Embodiment 1 are the same in Embodiment 2. In Embodiment 1, notches 16a and 16b are provided, but in Embodiment 2, the cylindrical flow path 17 is provided instead of notches 16a and 16b, which differs from Embodiment 1. Hereinafter, descriptions of the parts identical to those in Embodiment 1 will be omitted, and descriptions of the parts different from those in Embodiment 1 will be provided.

[0063] Figure 3A This is a cross-sectional view of filter element 1 according to Embodiment 2 of the present invention. Figure 3B This is an exploded perspective view of one end portion of the cylindrical flow path 17 of the filter element 1 according to Embodiment 2 of the present invention. Figure 3C This is a cross-sectional view of one end portion of the cylindrical flow path 17 of the filter element 1 in Embodiment 2. Figure 3DThis is a cross-sectional view of the other end portion of the cylindrical flow path 17 of the filter element 1 in Embodiment 2.

[0064] In embodiment 2, the second end plate 13 is engaged with the other end 14c of the core 14 and the other end 15b of the filter element 15. In this embodiment, a cylindrical flow path 17 is provided, which is arranged along the axial direction of the core 14 in the hollow portion of the core 14. The cylindrical flow path 17 is formed inside the wall of the cylinder as a hollow flow path.

[0065] The second end plate 13 has an opening 13a at the other end 17c of the cylindrical flow path 17, and the hollow portion of the cylindrical flow path 17 is in fluid communication with the outer side of the opening 13a of the second end plate 13. That is, a flow path connected to the cylindrical flow path 17 is formed through the opening 13a of the second end plate 13. For example, typically, the cylindrical flow path 17 is inserted into the opening 13a of the second end plate 13, and the outer surface of the cylindrical flow path 17 is sealed to the inner surface of the opening 13a of the second end plate 13. Alternatively, the end of the cylindrical flow path 17 may be joined to the periphery of the opening 13a of the second end plate 13 (not shown). The opening 13a of the second end plate 13 is sealed to the outer surface of the cylindrical flow path 17 located inside the core 14, so the space between the core 14 and the cylindrical flow path 17 is sealed by the second end plate 13 on the side of the other end 14c of the core 14 and the other end 17c of the cylindrical flow path 17. When the filter element 1 is installed in the filter container 5, the second fluid port 52 is in fluid communication with the cylindrical flow path 17 through the opening 13a of the second end plate 13.

[0066] An opening 17b is provided at one end 17a on the side of the first end plate 12 of the cylindrical flow path 17. At the end 17a on the side of the first end plate 12, the space defined between the inner surface of the core 14 and the outer surface of the cylindrical flow path 17 is in fluid communication with the hollow flow path of the cylindrical flow path 17 through the opening 17b. On the other hand, at the other end 17c on the side of the second end plate 13 of the cylindrical flow path 17, the space defined between the inner surface of the core 14 and the outer surface of the cylindrical flow path 17 is not in fluid communication with the hollow flow path of the cylindrical flow path 17 through the opening 17b.

[0067] On the other hand, the space defined between the outer surface of the core 14 and the cylindrical flow path 17 is sealed by the sealing portion of the other end 14c of the core 14 on the second end plate 13 side, and the other end 17c of the cylindrical flow path 17 on the second end plate 13 side is not in fluid communication with the core 14. Thus, the fluid flowing in from the outer surface side of the filter element 15 passes through the filter element 15 and reaches the inner surface of the filter element 15, from where it flows into the space defined between the core 14 and the outer surface of the cylindrical flow path 17 through the hole 14a of the core 14.

[0068] Because the second end plate 13 side is sealed, the fluid flowing into the space defined between the core 14 and the outer surface of the cylindrical flow path 17 flows toward the first end plate 12 side. The fluid reaching the first end plate 12 side flows into the interior of the cylindrical flow path 17 through the opening 17b, and is discharged from the second fluid port 52 through the hollow flow path of the cylindrical flow path 17 on the opening 13a side of the second end plate 13.

[0069] The effect of cylindrical flow path 17 is as follows. Figure 1 and Figure 5 In the flow of fluid FL in the filter element 15, on the side closer to the first fluid port 51 and the second fluid port 52, the flow FLb of fluid flowing in from the first fluid port 51 tends to exit immediately from the second fluid port 52 without reaching the upper part of the filter element 15. Therefore, on the side farther from the first fluid port 51 and the second fluid port 52, the flow FLU of fluid flowing in from the first fluid port 51 has no momentum and, due to gravity, declines well within the cylindrical flow path 17 and exits from the opening 13a.

[0070] Furthermore, the flow of fluid into the dead-end portion D at one end 15a of the filter element 15 is minimal, resulting in poor wettability. However, the cylindrical flow path 17 prevents the flow of fluid that flows into the first fluid port 51 near the first fluid port 51 and immediately exits from the second fluid port 52. This promotes the flow of fluid reaching the upper part of the filter element 15 through the space defined between the core 14 and the outer surface of the cylindrical flow path 17, resulting in increased fluid flow into the dead-end portion D and improved wettability.

[0071]

Implementation Method 3

[0072] The embodiments 1 and 2 described above can be applied independently, but they can also be combined. Embodiment 3 is a combination of embodiments 1 and 2. Figure 4A and Figure 4B As shown, in Embodiment 3, a cylindrical flow path 17 is provided in addition to the notch 16a. Furthermore, a notch 16b (not shown) can also be provided. By combining Embodiment 1 and Embodiment 2, the synergistic effect of merging Embodiment 1 and Embodiment 2 is achieved. Here, only the main parts of Embodiment 3 will be described below; other parts are the same as in Embodiment 1 and Embodiment 2, and therefore, descriptions are omitted.

[0073] In the filter element 1 of embodiment 3, a notch 16a is also provided at one end 14b of the core body 14. The notch 16a is a shape that is recessed from one end 14b of the core body 14 along the axial direction of the core body 14. Multiple notches 16a are formed in a manner that repeats in the circumferential direction perpendicular to the axial direction of the core body 14 at one end 14b. That is, the notch 16a at one end 14b of the core body 14 forms a concave end, and the portion other than the notch 16a forms a convex end along the circumference of one end 14b of the core body 14. Thus, one end 14b of the core body 14 is formed to alternately repeat the concave and convex shapes along the axial direction in the circumferential direction of the wall surface of the core body 14.

[0074] like Figure 4B As shown, the connection between one end 14b of the core 14 and the first end plate 12 is the connection between the convex end face of the core 14 (excluding the notch 16a) and the face of the first end plate 12. Furthermore, the outer surface of the filter element 15 is in fluid communication with the hollow portion of the core 14 via the notch 16a. That is, fluid flowing in from the outer surface of the filter element 15 passes through the filter element 15 and reaches the inner surface of the filter element 15, from where it flows into the core 14 through the hole 14a. In addition, the outer surface of the filter element 15 and the hollow portion of the core 14 are also in fluid communication via the notch 16a, allowing fluid to flow into the core 14 while in contact with the face of the first end plate 12 at the notch 16a.

[0075] Furthermore, in embodiment 3, a cylindrical flow path 17 is provided, which is arranged along the axial direction of the core 14 in the hollow portion of the core 14. The cylindrical flow path 17 is a hollow flow path formed inside the wall of the cylinder.

[0076] The second end plate 13 has an opening 13a at the other end 17c of the cylindrical flow path 17, and the hollow portion of the cylindrical flow path 17 is in fluid communication with the outer side of the opening 13a of the second end plate 13. That is, a flow path connected to the cylindrical flow path 17 is formed through the opening 13a of the second end plate 13. For example, typically, the cylindrical flow path 17 is inserted into the opening 13a of the second end plate 13, and the outer surface of the cylindrical flow path 17 is sealed to the inner surface of the opening 13a of the second end plate 13. Alternatively, the end of the cylindrical flow path 17 may also be joined to the periphery of the opening 13a of the second end plate 13 (not shown). The opening 13a of the second end plate 13 is sealed to the outer surface of the cylindrical flow path 17 located inside the core 14, so the space between the core 14 and the cylindrical flow path 17 is sealed by the second end plate 13 on the side of the other end 14c of the core 14 and the other end 17c of the cylindrical flow path 17. When the filter element 1 is installed in the filter container 5, the second fluid port 52 is in fluid communication with the cylindrical flow path 17 through the opening 13a of the second end plate 13.

[0077] An opening 17b is provided at one end 17a on the side of the first end plate 12 of the cylindrical flow path 17. At this end 17a on the side of the first end plate 12, the space defined between the inner surface of the core 14 and the outer surface of the cylindrical flow path 17 is in fluid communication with the hollow flow path of the cylindrical flow path 17 through the opening 17b. On the other hand, at the other end 17c on the side of the second end plate 13 of the cylindrical flow path 17, the space defined between the inner surface of the core 14 and the outer surface of the cylindrical flow path 17 is not in fluid communication with the hollow flow path of the cylindrical flow path 17 through the opening 17b.

[0078] On the other hand, the space defined between the core 14 and the outer surface of the cylindrical flow path 17 is sealed by the sealing portion of the other end 14c of the core 14 on the side of the second end plate 13, and the other end 17c of the cylindrical flow path 17 on the side of the second end plate 13 is not in fluid communication with the core 14. Thus, the fluid flowing in from the outer surface of the filter element 15 passes through the filter element 15 and reaches the inner surface of the filter element 15, from where it flows into the space defined between the core 14 and the outer surface of the cylindrical flow path 17 through the hole 14a of the core 14.

[0079] Implementation method 3 is a combination of implementation method 1 and implementation method 2. Therefore, the functions and effects of implementation method 1 and implementation method 2 described so far are the same as those of the two. Further explanation is omitted here.

[0080] This application claims priority to Japanese Patent Application No. 2023-195609, filed on November 17, 2023, the contents of which are incorporated herein by reference.

[0081] Label Explanation

[0082] 1: Filter element; 5: Filter container (filter device); 11: Cover; 11a: Cover hole; 12: First end plate; 13: Second end plate; 13a: Opening of (second end plate); 14: Core; 14a: Core hole; 14b: One end of (core); 14c: The other end of (core); 15: Filter media (filter element); 16: Notch; 17: Cylindrical flow path; 17a: One end of (cylindrical flow path); 17b: Connecting hole of (cylindrical flow path); 17c: The other end of (cylindrical flow path); 51: First fluid port; 52: Second fluid port.

Claims

1. A filter element, comprising: The filter media is formed in the shape of a cylinder with a hollow section; The core has an elongated shape with a hollow portion, and is inserted into the hollow portion of the filter material in a manner that supports the hollow portion of the filter material, and has a plurality of holes between the inside and outside of the core to connect the inside and outside of the core. A first end plate is joined to one end of the core and one end of the filter material to seal one end of the core; as well as The second end plate, which is joined to the other end of the core and the other end of the filter material, has an opening communicating with the hollow portion of the core. in, The core has a notch at one end, and the engagement of the core with the first end plate is the engagement of the end face of the core other than the notch with the first end plate. The filter material is also fluidly connected to the hollow part of the core through the notch.

2. The filter element according to claim 1, wherein, The filter material is a membrane film. The cylinder is formed by overlapping and folding the diaphragm film in the circumferential direction of the cylinder.

3. The filter element according to claim 1 or 2, wherein, The filter element has a cover that is elongated and has the shape of a cylinder containing a hollow portion. The cover supports the outer surface of the cylinder of the filter material and has a plurality of holes that connect the inside and outside of the cover.

4. A filter element, comprising: The filter media is formed in the shape of a cylinder with a hollow section; The core is elongated and inserted into the hollow portion of the filter material to support the hollow portion of the filter material, and has a plurality of holes between the inside and outside of the core to connect the inside and outside of the core. A first end plate is joined to one end of the core and one end of the filter material to seal one end of the core; The second end plate, which is joined to the other end of the core and the other end of the filter material, has an opening; as well as A cylindrical flow path, having a hollow flow path inside, is arranged along the axial direction of the core within the hollow portion of the core, with one end of the cylindrical flow path engaging with the first end plate and the other end engaging with the second end plate. in, The space defined between the inner surface of the core and the outer surface of the cylindrical flow path is in fluid communication with the hollow flow path of the cylindrical flow path at one end, but not at the other end.

5. The filter element according to claim 4, wherein, The filter material is a membrane film. The cylinder is formed by overlapping and folding the diaphragm film in the circumferential direction of the cylinder.

6. The filter element according to claim 4, wherein, The space defined between the core and the outer surface of the cylindrical flow path, except for the portion at the first end plate side of the cylindrical flow path, is not in fluid communication with the hollow flow path of the cylindrical flow path.

7. The filter element according to claim 4, wherein, The filter element has a cover that is elongated and has the shape of a cylinder containing a hollow portion. The cover supports the outer surface of the cylinder of the filter material and has a plurality of holes that connect the inside and outside of the cover.

8. The filter element according to any one of claims 4 to 7, wherein, The cylindrical flow path is inserted into the opening of the second end plate, and the outer surface of the cylindrical flow path is sealed and joined with the inner surface of the opening of the second end plate.

9. A filter element, comprising: The filter media is formed in the shape of a cylinder with a hollow section; The core has an elongated shape with a hollow portion, and is inserted into the hollow portion of the filter material in a manner that supports the hollow portion of the filter material, and has a plurality of holes between the inside and outside of the core to connect the inside and outside of the core. A first end plate is joined to one end of the core and one end of the filter material to seal one end of the core; The second end plate, which is joined to the other end of the core and the other end of the filter material, has an opening; as well as A cylindrical flow path has a hollow flow path inside, which is arranged along the axial direction of the core in the hollow portion of the core. One end of the cylindrical flow path is sealed and engaged with the first end plate, and the other end is engaged with the second end plate in such a way that it forms a flow path connected to the hollow flow path of the cylindrical flow path through the opening of the second end plate. in, The core has a notch at one end, and the engagement of one end of the core with the first end plate is the engagement of the end face of the core other than the notch with the first end plate. The filter material is also fluidly connected to the hollow portion of the core through the notch. The space defined between the inner surface of the core and the outer surface of the cylindrical flow path is in fluid communication with the hollow flow path of the cylindrical flow path at one end, but not at the other end.

10. The filter element according to claim 9, wherein, The filter material is a membrane film. The cylinder is formed by overlapping and folding the diaphragm film in the circumferential direction of the cylinder.

11. The filter element according to claim 9, wherein, The space defined between the core and the outer surface of the cylindrical flow path is not in fluid communication with the hollow portion of the cylindrical flow path at the portion other than the end of the first end plate side of the cylindrical flow path.

12. The filter element according to claim 9, wherein, The filter element has a cover that is elongated and has the shape of a cylinder containing a hollow portion. The cover supports the outer surface of the cylinder of the filter material and has a plurality of holes that connect the inside and outside of the cover.

13. The filter element according to any one of claims 9 to 12, wherein, The cylindrical flow path is inserted into the opening of the second end plate, and the outer surface of the cylindrical flow path is sealed and joined with the inner surface of the opening of the second end plate.

14. A filter device having a filter element internally, wherein, The filter element has: The filter media is formed in the shape of a cylinder with a hollow section; The core has an elongated shape with a hollow portion, and is inserted into the hollow portion of the filter material in a manner that supports the hollow portion of the filter material, and has a plurality of holes between the inside and outside of the core to connect the inside and outside of the core. A first end plate is joined to one end of the core and one end of the filter material to seal one end of the core; as well as The second end plate, which is joined to the other end of the core and the other end of the filter material, has an opening communicating with the hollow portion of the core. The core has a notch at one end, and the engagement of the core with the first end plate is the engagement of the end face of the core other than the notch with the first end plate. The filter material is also fluidly connected to the hollow part of the core through the notch.

15. The filter device according to claim 14, wherein, The filter material is a membrane film. The cylinder is formed by overlapping and folding the diaphragm film in the circumferential direction of the cylinder.

16. The filter device according to claim 14 or 15, wherein, The filter device has a cover that is elongated and has the shape of a cylinder including a hollow portion. The cover supports the outer surface of the cylinder of the filter material and has a plurality of holes that connect the inside and outside of the cover.

17. A filter device having a filter element internally, wherein, The filter element has: The filter media is formed in the shape of a cylinder with a hollow section; The core is elongated and inserted into the hollow portion of the filter material to support the hollow portion of the filter material, and has a plurality of holes between the inside and outside of the core to connect the inside and outside of the core. A first end plate is joined to one end of the core and one end of the filter material to seal one end of the core; The second end plate, which is joined to the other end of the core and the other end of the filter material, has an opening; as well as A cylindrical flow path, having a hollow flow path inside, is arranged along the axial direction of the core within the hollow portion of the core, with one end of the cylindrical flow path engaging with the first end plate and the other end engaging with the second end plate. The space defined between the inner surface of the core and the outer surface of the cylindrical flow path is in fluid communication with the hollow flow path of the cylindrical flow path at one end, but not at the other end.

18. The filter device according to claim 17, wherein, The filter material is a membrane film. The cylinder is formed by overlapping and folding the diaphragm film in the circumferential direction of the cylinder.

19. The filter device according to claim 17, wherein, The space defined between the core and the outer surface of the cylindrical flow path is not in fluid communication with the hollow portion of the cylindrical flow path at the portion other than the end of the first end plate side of the cylindrical flow path.

20. The filter device according to claim 17, wherein, The filter device has a cover that is elongated and has the shape of a cylinder including a hollow portion. The cover supports the outer surface of the cylinder of the filter material and has a plurality of holes that connect the inside and outside of the cover.

21. The filter device according to any one of claims 17 to 20, wherein, The cylindrical flow path is inserted into the opening of the second end plate, and the outer surface of the cylindrical flow path is sealed and joined with the inner surface of the opening of the second end plate.

22. A filter device having a filter element internally, wherein, The filter element has: The filter media is formed in the shape of a cylinder with a hollow section; The core has an elongated shape with a hollow portion, and is inserted into the hollow portion of the filter material in a manner that supports the hollow portion of the filter material, and has a plurality of holes between the inside and outside of the core to connect the inside and outside of the core. A first end plate is joined to one end of the core and one end of the filter material to seal one end of the core; The second end plate, which is joined to the other end of the core and the other end of the filter material, has an opening; as well as A cylindrical flow path has a hollow flow path inside, which is arranged along the axial direction of the core in the hollow portion of the core. One end of the cylindrical flow path is sealed and engaged with the first end plate, and the other end is engaged with the second end plate in such a way that it forms a flow path connected to the hollow flow path of the cylindrical flow path through the opening of the second end plate. The core has a notch at one end, and the engagement of one end of the core with the first end plate is the engagement of the end face of the core other than the notch with the first end plate. The filter material is also fluidly connected to the hollow portion of the core through the notch. The space defined between the inner surface of the core and the outer surface of the cylindrical flow path is in fluid communication with the hollow flow path of the cylindrical flow path at one end, but not at the other end.

23. The filter device according to claim 22, wherein, The filter material is a membrane film. The cylinder is formed by overlapping and folding the diaphragm film in the circumferential direction of the cylinder.

24. The filter device according to claim 22, wherein, The space defined between the core and the outer surface of the cylindrical flow path is not in fluid communication with the hollow portion of the cylindrical flow path at the portion other than the end of the first end plate side of the cylindrical flow path.

25. The filter device according to claim 22, wherein, The filter device has a cover that is elongated and has the shape of a cylinder including a hollow portion. The cover supports the outer surface of the cylinder of the filter material and has a plurality of holes that connect the inside and outside of the cover.

26. The filter device according to any one of claims 22 to 25, wherein, The cylindrical flow path is inserted into the opening of the second end plate, and the outer surface of the cylindrical flow path is sealed and joined with the inner surface of the opening of the second end plate.

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