JPS6377506A - Filter cartridge and filter device - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to filter cartridges and filter devices, and more particularly to filter cartridges having a generally triangular cross section and the use of such filter cartridges in a generally cylindrical shape to increase filtration capacity. The present invention relates to a filter device in which a plurality of containers are loaded into a container.

BACKGROUND OF THE INVENTION Generally, filter devices include a generally cylindrical filter container containing a number of replaceable filter cartridges for filtering impurities from a fluid. A typical filter cartridge consists of filter media, a support for the media, and an end cap attached to each end of the filter media. Such filter containers are typically cylindrical for ease of manufacture, and include as many replacements as possible to maximize filtration capacity in a container with a given inner diameter. It would be desirable to be able to load a filter cartridge into the container.

Traditionally, filter cartridges have had a generally circular cross section, dictated by the shape of the support member for the filter media. The support member must not only be able to withstand the forces of fluid pressure applied across the filter cartridge, but also the forces applied along its axis to secure the filter cartridge within the container. No. Generally, such support members consist of perforated tubes, often reinforced by support lofts provided therein along the axial direction. The support member needs to have sufficient strength to withstand the above-mentioned lateral and longitudinal forces, and therefore it has traditionally been considered most economical to use a cylindrical support member. Therefore, generally cylindrical filter cartridges have been generally used.

As a result, when the user selects a filter container with a predetermined inner diameter, the number of filter cartridges to be used is automatically determined. Furthermore, once the number of filter cartridges was determined to obtain the desired filtration capacity, the necessary inner diameter of the filter container was automatically determined based on the overall outer diameter of those filter cartridges.

A drawback of filter devices based on the prior art as described above is that, given a filter container of a particular internal diameter and a desired filtration capacity, it may not be possible to load the required number of filter cartridges into the filter container. That's what it means. For example, a typical filter container is 406m (
A typical filter cartridge has an outer diameter of 152 m (6 inches). - Therefore, only four such filter cartridges can be loaded into such a filter container. Therefore, if it is considered that four filter cartridges are insufficient to achieve the filtration capacity that should be achieved by a filter container of such size, such a filter device will be unsatisfactory to the user.

Another drawback of known filter devices such as those described above concerns the generally cylindrical thin-walled support member, which can collapse under relatively small external forces. In order to overcome this drawback, the supporting member must be made thicker, which reduces the thickness of the filter medium and
A problem arises in that the filtration capacity is reduced.

<Problems to be Solved by the Invention> As described above, a filter has an improved shape so that a large number of filter cartridges can be loaded in a filter container having a specific inner diameter so as to exceed the desired filtration capacity by one. Cartridges are desired.

The present invention seeks to solve the above-mentioned problems by providing a filter device comprising a plurality of filter cartridges having a generally triangular cross-section for compact loading into a container.

A principal object of the present invention is to provide an improved filter device consisting of a filter container and a plurality of filter cartridges of generally triangular cross-section compactly packed therein.

A second object of the invention is a filter device having a generally cylindrical filter container and a plurality of filter cartridges having a generally triangular cross section, the filter device having a more specific internal diameter than filter cartridges having a circular cross section. In order to be able to load a larger number of filter cartridges into the filter container, a plurality of filter cartridges are loaded into the filter container so that one side of the filter cartridge faces the inner circumferential surface of the filter container at a distance. An object of the present invention is to provide a filter device.

Yet another object of the invention is to provide a filter device whose filtration capacity is maximized for its size.

Yet another object of the invention is to provide a replaceable filter cartridge having a generally triangular cross section.

Still another object of the present invention is to provide a filter device comprising a plurality of filter cartridges each having a generally triangular cross section to save space in a generally cylindrical filter container. .

Means for Solving the Problems According to one aspect of the present invention, there is provided a filter cartridge for filtering a fluid, the filter cartridge having opposite ends and an internal passageway and having a permeable filter cartridge for filtering impurities from a fluid. a porous support member supporting the permeable filter media and having a fluid passageway; and an end cap sealably attached to the filter media in communication with the internal passageway. A filter cartridge is provided, characterized in that the permeable filter medium has a circumferential surface of triangular cross section with at least three side surfaces forming acute angles to each other and connected to each other by arcuate sections.

According to another aspect of the invention, a filter container having a generally cylindrical inner circumferential surface and having a reservoir inlet for introducing the fluid to be filtered and an outlet for removing the filtered fluid; a filter cartridge assembly for filtering a fluid by having a plurality of individually replaceable filter cartridges loaded into the filter container, the filter cartridges having an interior in communication with the outlet; a porous support member supporting the elongated permeable filter media, and a pair of end caps attached to opposite ends of the filter media; one of the caps is sealably disposed between the filter media and the outlet of the container and has an opening in communication with the internal passageway of the filter media and the outlet of the container; the medium has a generally triangular cross-section with three generally flat sides;
A filter device is provided, wherein one of the sides faces the inner peripheral surface of the container at a certain distance.

The permeable filter media form at least an acute angle with each other.
The fluid to be filtered passes through the filter media, the support member, and through the opening in the end cap via the internal passageway.

Effect> The filter cartridges are configured to have a generally triangular cross section with an outer circumferential surface defining three generally flat sides, and these filter cartridges are arranged such that one side of the filter cartridge is attached to the inner circumferential surface of the filter container. By loading the filter cartridges into the filter container in spaced and opposing directions, a larger number of filter cartridges can be loaded into the cylindrical container than with filter cartridges having a circular cross section and the same circumferential area. Since even a circular filter cartridge has the same outer peripheral area as a filter cartridge having a triangular cross section, the filtration capacity of a filter container having a specific inner diameter can be increased. Furthermore, since a larger number of filter cartridges having a triangular cross section can be loaded into a cylindrical filter container, the flow within the container can be made more uniform.

Another advantage of the invention is obtained by providing the support member with a generally triangular cross-section similar to the filter media. In general, a support member with a triangular cross section has a higher crushing strength than a support member with a cylindrical shape and can therefore withstand higher external forces.

Moreover, because of its high crush strength, the support member with a triangular cross section can be constructed from a thinner member than the support member with a circular cross section, and the thickness of the filter medium can be maximized, thus Its filtration capacity can be maximized.

<Embodiments> Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The filter device 10 shown in FIG.
(16 inches) and a container 12 having an inner diameter of, e.g.
It has four filter cartridges 14 having an outer diameter of 2# (6 inches). As is clear from this figure, 4
Two cylindrical filter cartridges 14 are placed in the container 12.
Its filtration capacity is limited.

In contrast, the filter device 16 according to the invention shown in FIG.
The cylindrical container 18 also has an internal diameter of 406 m (16 inches) and is loaded with six filter cartridges 24 according to the invention.

These filter cartridges 24 have approximately the same circumferential area as the cylindrical filter cartridge 14 shown in FIG. The filter cartridge 24 has a generally triangular cross section, and its flat sides 26 face the inner circumferential surface 22 with a distance therebetween. Since the filter cartridges 24 are loaded in the container 18 in this way, a larger number of filter cartridges can be loaded,
The filtration capacity of the filter device 16 can be increased. When available space within the filter device 16 is limited, and therefore the internal diameter of the container 18 is limited, the use of a filter cartridge 24 with a triangular cross section maximizes the filtration capacity for a given container 18 size. can do.

In the embodiment shown in FIGS. 5-7, the filter cartridge 24 is relatively elongated and has opposite ends 30.
．． 32 and an internal passage 34, and a support member 36 made of a thin perforated plate or the like is disposed within the passage 34 to support the filter medium 28.

A pair of generally triangular end caps 38, 40 are attached to opposite ends of filter media 28.

The end caps 38, 40 have similar construction and only one end cap 38 will be described below.

End cap 38 has a generally triangular outer flange 42, a conformal inner flange 44, and a flat portion 46 extending therebetween. Both flanges 42.4
4 have a spacing equal to the thickness of the assembly of filter media 28 and support member 36, and a suitable adhesive 48 is applied to the flat portion 46 between the flanges. Both ends of filter media 28 and support member 36 are provided with flanges 42.
．． 44 and is sealably bonded to flat portion 46 to prevent fluid leakage at this joint. A gasket 52 is attached to the end caps 38.40, and these end caps 38.4
0 each have a generally triangular opening 50. As shown, filter media 28 has generally flat sides 54, 56, 58 connected to each other by curved surfaces 60, 62, 64 to define a triangular outer peripheral surface 66.

The filter cartridge 24 has a support member 36 disposed in the internal passageway 34 of the fluid medium 28 to accommodate the direction of fluid flow such that the fluid flows from the outer peripheral surface 66 through the filter medium 28 to the internal passageway 34. It has the following structure. For this type of filter cartridge, a support member 36 is provided within the internal passageway 34 to prevent the filter media 28 from collapsing due to axial forces applied to secure the filter cartridge 24 within the container 18 or pressure differentials between the interior and exterior thereof. It is arranged.

For filter cartridges in which fluid is directed from the inner passageway 34 through the filter medium 28 and out the outer circumferential surface 66, the support member extends over the outer circumferential surface 66 of the filter medium so that the filter medium 28 can withstand differential pressures on the inside and outside of the filter medium 28. will be placed in

Filter media 28 may be comprised of any other suitable permeable material, such as one having sufficient density and strength to eliminate the need for support member 36 and end caps 38,40. Manufacturing costs can be reduced by making the moldable resin material as shown in FIG. Additionally, filter media 28 may be of any type, including pleated, unpleated, or solid forms.

Furthermore, the sides 54, 56, 58 are not only flat, but can also be outwardly convex to further increase the crush resistance of the filter medium 28.

The fluid in the filter device according to the invention can be of any type, and the impurities to be filtered can be solid or liquid foreign matter of any particle size.

The end catubs 38, 40 may be made of any material, such as epoxy, polyester, other resin materials, metal materials, fibrous materials, etc., provided that they assist the support member 36 in providing the necessary structural strength to the filter media 28. It may be made of material. Additionally, gasket 52 may be made of any material that can be used with filter cartridge 24.

In order to compactly load the filter cartridge into the container 18 as shown in FIG. It is required that the following relationship exists between the radius of curvature RO of the curved surfaces 6o and 62.64.

2πR=2πRO+3L By selecting the filter cartridge 24 based on the above relationship, the filter cartridge 24 can be disposed within the container 18 as shown in FIG. This formula applies to the lengths of sides 54, 56, 68 for a filter cartridge with a triangular cross section, such as cartridge 24, for a standard circular cross section filter cartridge with an outside diameter of 152# (6 inches). It is used to find.

As shown in FIGS. 3 and 4, a filter device 16 according to the invention may have a different arrangement of second teeth than that shown in the filter cartridge 24. The container 18 may include a filter cartridge assembly 70 having a plurality of filter cartridges 72 having a triangular cross-section with small lateral dimensions. The filter cartridge 72 is the same as the filter cartridge 24 described above, except that the dimensions are slightly different.
It has almost the same structure as . The container 18 has four supporting legs 74
, of which only two are shown, the ends 76, 78 of the container 18 are outwardly convex.

Container 18 further includes an end plate 80 secured to end 76 , and a plurality of openings 82 in end plate 80 define container interior 20 between end plate 80 and end 76 . It communicates with a contoured outlet chamber 84 . The outlet chamber 84 communicates with an outlet 86 for discharging the filtered fluid.

The inlet 88 of the container 18 directs the fluid to be filtered into the interior chamber 20.
to be introduced. A plurality of filter cartridges 72 having a similar structure include a gasket 52 and an end cap 38.
It is concentrically and closely abutted on the outer periphery of the opening 82 of the end plate 80 via.

The cartridge 72 is held upright by a press plate 90 fixed to the other end 78 of the container, and the upper end of the cartridge 72 is held via a gasket 52 received in a circular recess 92 provided in the press plate 90. is in contact with the presser plate 90. There are various ways to secure cartridge 72 within container 18, examples of which are described in U.S. Pat. No. 4,320,005.

As shown in FIG. 4, because cartridge 72 is not formed according to the above formula to be loaded into container 18 as shown in FIG. Since the space is defined, the cartridge 72 can be disposed within this space. Similar to the embodiment shown in FIG. 2, one flat side of each cartridge 72 faces the inner circumferential surface 22 of the container 18 at a slight distance, so that You can make the most of your space.

In operation of the filter device of this embodiment, fluid to be filtered is introduced into interior chamber 20 through inlet 88 and is filtered by passing through filter media 28 . The filtered fluid passes through the perforated plate support member 36 into the internal passageway 34 and flows downwardly through the end cap opening 50 and then through the opening 82 into the outlet chamber 84.

The opening 82 has a triangular shape to fit the triangular gasket 52. The filtered fluid enters the outlet chamber 8
4 to an outlet 86.

By attaching the support member 36 to the outer circumferential surface 66 of the cartridge 72, reverse filtration can be achieved, in which the fluid to be filtered passes through the outlet 86, the outlet chamber 84, the internal passageway 34, and the filter medium 28. , and after passing through the corresponding support member 36 , it follows a reverse path leading out of the container 18 from the inlet 88 .

FIG. 8 shows another embodiment of a filter cartridge 93 in which the filter media 94 has a generally triangular outer circumferential surface while the interior passageway 96 extending between its ends has a generally circular cross section. A support member 98 made of a perforated plate having a generally circular cross section is mounted within the passageway 96 so as to abut the inner circumferential surface of the filter medium 94 . The end cap for this alternative embodiment has a generally triangular outer flange 42, a generally circular inner flange 100, and a generally circular gasket 102 located between the flanges. In this embodiment as well, the filter medium 94 and the support member 98 are fixedly sealed between the flanges 42,100. Furthermore, when adapted for fluid flow from the inside to the outside, the filter cartridge 93
has a support member 36 having a generally triangular cross section on its outer peripheral surface.

The inventive concept also encompasses different types of filter cartridges having polygonal cross-sections that can be compactly loaded into the container 18. One such filter cartridge, as shown in FIG. 9, has a generally trapezoidal cross-section with at least three sides 106, 108, and 110 forming acute angles to each other. As shown in FIG. 2, such a filter cartridge is inserted into a container 1 with its side 110 facing the inner peripheral surface 22 of the container.
It can be placed within 8. All of the filter cartridges described above are replaceable. Other types of filter cartridges can be used, including pentagonal, hexagonal, hexagonal, and other geometric shapes.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional filter device. FIG. 2 is a cross-sectional view of one embodiment of the present invention. FIG. 3 is a longitudinal sectional view, partially cut away, of a second embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line 4--4 in FIG. FIG. 5 is a partially cutaway perspective view of a filter cartridge according to the present invention. FIG. 6 is a cross-sectional view taken along line 6--6 in FIG. FIG. 7 is a longitudinal sectional view of one end of the filter cartridge. FIG. 8 is a cross-sectional view of a filter cartridge as a modified embodiment of the present invention. FIG. 9 is a cross-sectional view showing yet another modified embodiment of the filter cartridge according to the invention. DESCRIPTION OF SYMBOLS 10... Filter device 12... Container 14... Filter cartridge 16... Filter device 18... Container 20... Inner chamber 22... Inner peripheral surface 24... Filter cartridge 26...・Side surface (side) 28...filter medium 30
．． 32... End portion 34... Internal passage 36... Support member 38.40... End cap 42.44... Flange 46... Flat portion 48...
Adhesive 50...Opening 52...Gasket 54.56.58...Side (side) 60.62.64...Curved surface 66...Peripheral surface 70...Cartridge assembly 72...Filter Cartridge 74... Support leg 76.78... End portion 80.
... End plate 82 ... Opening 84 ... Exit chamber
86...Exit 8B...Entrance 90.
... Pressing plate 92 ... Opening 94 ... Filter medium 96 ... Internal passage 98 ... Support member 1
00...Flange 102...Gasket 106
．． 108.110...side (side) patent applicant Howard T. Degraafenreid

Claims (9)

[Claims] (1) A filter cartridge for filtering a fluid, the cartridge having a permeable filter medium for filtering impurities from the fluid, having opposite ends and an internal passageway, and supporting the permeable filter medium and for use in the fluid. a porous support member having a passageway; and an end cap sealably attached to the filter media in communication with the internal passageway, the permeable filter media forming an acute angle with respect to each other and an arcuate portion. A filter cartridge characterized in that it has a peripheral surface of triangular cross section with at least three side surfaces connected to each other. (2) the internal passageway and the support member each have similar triangular cross-sections defining at least three generally planar faces at acute angles to each other;
A pair of flange members having a triangular shape similar to the above and protruding in the same axial direction and one enclosing the other are provided, and the ends of the filter medium and the support member can be sealed between the two flange members. The filter cartridge according to claim 1, wherein the filter cartridge is sandwiched. (3) the support member is located within the internal passage;
the support member and the internal passageway have a generally circular cross section;
Moreover, the end cap includes a pair of flange members that protrude in the same axial direction and one encloses the other, the outer flange member having a triangular cross section similar to that described above, and the inner flange member having a triangular cross section similar to that described above. A filter cartridge according to claim 1, having similar circular cross-sections, wherein the ends of the filter media and the support member are sealably sandwiched between the flange members. . (4) A filter container having a generally cylindrical inner circumferential surface and having an inlet for introducing a fluid to be filtered and an outlet for leading out the filtered fluid, and a filter container loaded in the filter container. a filter cartridge assembly for filtering a fluid by having a plurality of individually replaceable filter cartridges, the filter cartridge having an elongated internal passageway communicating with the outlet; a porous support member supporting the elongated permeable filter media, and a pair of end caps attached to opposite ends of the filter media, one of the end caps supporting the filter. an opening sealably disposed between the media and the outlet of the container and communicating with the internal passageway of the filter media and the outlet of the container, the filter media having a generally flat A filter device having a generally triangular cross section with three sides, one of the three sides facing the inner peripheral surface of the container at a distance. (5) The filter device according to claim 4, wherein both the internal passageway and the support member have a generally triangular cross section. (6) The filter device according to claim 5, wherein the end cap has a generally triangular shape, and the opening of the end cap has a generally triangular shape. (7) The filter device according to claim 5, wherein the end cap has a generally triangular shape, and the opening of the end cap has a generally circular shape. (8) The internal passageway and the support member both have a generally triangular cross section, the end cap has a pair of flange members protruding in the same axial direction, and the flange members have a generally triangular cross section. 5. The filter device according to claim 4, wherein both ends of the filter medium and the support member are sealably clamped between the flange members. (9) Both the internal passageway and the support member have a generally triangular cross section, the end cap has a pair of flange members protruding in the same axial direction, and one of the flange members has a generally triangular cross section; Claim 4, characterized in that the filter medium is triangular in shape, the other being generally triangular in shape, and both ends of the filter medium and the support member are sealably clamped between the two flange members. The filter device described.