JP2001062211A - Fluid filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fluid filter formed compact by simplifying a structure. SOLUTION: A fluid filter is provided with a filter element 3 containing a molding molded by press-dehydrating a slurry like raw material prepared by dispersing fiber in a liquid, a bottomed cylindrical case 2 housing the filter element 3, a set plate 4 as a sealing member for closing the opening of the case 2 and an element press member 11 provided between the set plate 4 and the filter element 3 and for pressing the one end 3b of the filter element 3 to the inside bottom surface 2a of the case 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to oils, fuels,
The present invention relates to a fluid filter for filtering a fluid such as water or air.

[0002]

2. Description of the Related Art As a filter element of an oil filter mounted on a vehicle, there is known a filter element in which a filter paper is bent in a zigzag to form a large number of folds, and the folds of the filter paper are rounded into a cylindrical shape. By storing such a filter element in a predetermined case, for example, oil is filtered with the outer peripheral side of the filter element as a dirty side and the inner peripheral side as a clean side.

Since the above-described filter element having the folded structure has openings at both ends in the axial direction, the oil on the dirty side flows to the clean side without passing through the filter paper unless it is closed. Conventionally, end plates are arranged at both ends of the element, a spring member is integrated between the inner bottom surface of the case and the end plate at one end of the filter element, and a check valve is integrated at the other end of the filter element. The sealed packing is arranged to seal both ends of the filter element, and at the same time restricts the filter element in the axial direction.

[0004]

In the conventional structure, it is necessary to accommodate several parts at both ends of the filter element, which complicates the internal structure. Various spaces are required in the case, and the dimensions of the filter, particularly the overall height, are likely to increase. As an oil filter for an automobile, for example, as disclosed in Japanese Utility Model Application Laid-Open No. 56-159109 and Japanese Utility Model Application Laid-Open No. 64-12608, an oil cooler is arranged on the outer or inner circumference of a filter element. Functionalized ones have also been proposed, but additional components will be added to the conventional filter, which will inevitably increase the size and cost of the entire filter, making it a component that must be replaced periodically. It was out of tolerance.

[0005] An object of the present invention is to provide a fluid filter that can be simplified in structure and configured compactly.

[0006]

Hereinafter, the present invention will be described. In addition, in order to facilitate understanding of the present invention, reference numerals in the accompanying drawings are added in parentheses, but the present invention is not limited to the illustrated embodiment.

According to a first aspect of the present invention, there is provided a filter element (3) including a compact formed by dehydrating and pressing a slurry-like raw material obtained by dispersing fibers in a liquid, and a bottomed cylinder containing the filter element. Case (2), a sealing member (4) for closing the opening of the case, and one end (3b) of the filter element provided between the sealing member and the filter element, and The above-mentioned problem is solved by a fluid filter provided with an element pressing member (11) for pressing against 2a).

According to the present invention, the filter element is formed in a block shape in which the fiber raw material is compacted, and it is not necessary to cover both ends in the axial direction with separate members. For this reason, one end of the filter element is pressed against the inner bottom surface of the case to eliminate a space for accommodating another member from between them, thereby reducing the overall height of the case and simplifying the configuration inside the case. Since the element pressing member is provided between the sealing member and the filter element, a space necessary for inflow or outflow of fluid can be secured between the sealing member and the filter element.

According to a second aspect of the present invention, in the fluid filter according to the first aspect, an outlet (6) for a filtered fluid is provided at a center of the sealing member, and the element pressing member connects the outlet. It has a ring-like shape surrounding it. According to the present invention, the inside of the case can be divided into the dirty side (S1) and the clean side (S2) using the element pressing member.

According to a third aspect of the present invention, in the fluid filter according to the second aspect, a packing is provided between the element pressing member and the sealing member so as to surround the outflow port. Features. This allows
The gap between the sealing member and the element pressing member is reliably sealed, and the flow of the fluid from the dirty side to the clean side can be prevented through the gap.

According to a fourth aspect of the present invention, in the fluid filter according to the first aspect, an interior part (20) is provided on an inner periphery or an outer periphery of the filter element. The invention according to claim 5 is characterized in that a heat exchanger (20) is provided as the interior part.
According to these inventions, the filter can be multifunctional by providing an interior component in the case without increasing the overall height of the filter.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first embodiment in which the present invention is applied to a filter device for filtering engine oil of an automobile. In this filter device 1, a filter element 3 is mounted inside a bottomed cylindrical case 2,
The opening of the case 2 is closed by a set plate 4 as a sealing member, and the outer periphery of a closure plate 5 welded to the set plate 4 is fixedly wound around the opening edge of the case 2. .

The filter element 3 is manufactured using a compact obtained by dewatering and pressing a slurry-like raw material obtained by dispersing fibers in a liquid. The filter element 3 can be manufactured by cutting such a formed body into a predetermined size, or the formed body itself can be used as the filter element 3 by manufacturing a formed body having a predetermined size and shape. You can also.

The density of the filter element 3 is, for example,
It can be arbitrarily controlled by changing the composition ratio of the slurry-like raw material. The density of the filter element 3 may be constant over its entirety, or a high density portion and a low density portion may be provided.

The shape of the filter element 3 is a cylindrical shape having a hollow portion 3a having a through-hole shape at the center. Specifically, the outer periphery of one end 3 b of the filter element 3 is formed in a round shape in accordance with the curvature of the inner bottom surface 2 a of the case 2. However, only the center flat portion of the one end 3b of the filter element 3 may be in close contact with the inner bottom surface 2a, and the outer peripheral side may be separated from the inner bottom surface 2a.
The pressing direction of the filter element 3 is made to coincide with, for example, the axial direction of the filter element 3. However, you may press in directions other than an axial direction.

An outlet 6 for filtered oil is formed at the center of the set plate 4, and a plurality of inlets 7 for oil before filtration are formed outside the outlet 6. On the inner periphery of the outlet 6, a female screw 8 for connecting the outlet 6 to an oil inlet (not shown) on the engine side is provided. An annular packing 9 is provided on the closure plate 5. When the female screw 8 is connected to the inflow port on the engine side, the packing 9 is in close contact with the engine side and oil leakage to the outside from the connection between the engine and the filter device 1 is prevented. Note that the closure plate 5 may be omitted, the packing 9 may be provided on the set plate 4, and the set plate 4 and the case 2 may be directly fixed. Instead of the set plate 4, a sealing member may be integrally formed on the engine block side, and the case 2 may be connected thereto to close the inside of the case.

Inside the set plate 4, the inside of the filter device 1 is provided with the dirty side S1 and the clean side S2.
A packing 10 and an element pressing member 11 are provided for classifying the components. The packing 10 has a ring shape and is provided in close contact with the outer periphery of the outlet 6 as shown in FIG. In addition, as shown in FIG. 2B, an annular lip portion 10a covering the inflow port 7 is formed integrally with the packing 10, and the packing 10 prevents the oil from flowing backward from the dirty side S1 to the inflow port 7. You may function as a valve.

As shown in FIGS. 2 and 3, the element holding member 11 has a ring-like external shape, and the center side thereof is folded upward to form a packing holding portion 11a. A shallow conical partition wall part 11b is formed outside the packing holding part 11a, and further outside the element holding part 11 which is in close contact with the other end 3c of the filter element 3.
c is formed. Such an element holding member 1
1 can be formed by pressing a metal plate. The element pressing member 11 may be formed by resin molding.

The procedure for manufacturing the filter device 1 is as follows. The filter element 3 is housed in the case 2,
The packing 10 and the element pressing member 11 are mounted on the set plate 4. Next, the set plate 4 is
Of the closure plate 5 in the case 2
And fix it by tightening.

As a result, one end 3b of the filter element 3 comes into close contact with the inner bottom surface 2a of the case 2, and oil leakage through the gap between the one end 3b and the inner bottom surface 2a is prevented. On the other hand, on the other end 3c side of the filter element 3, the flange 11c of the element holding member 11 is in close contact with the other end 3c of the filter element 3, and the packing holding portion 11a, the packing 10, and the set plate 4 of the element holding member 11 are mutually connected. , Leakage of oil through a gap between these members or elements is prevented.
Therefore, all the oil that has flowed into the dirty side S1 from the inflow port 7 passes through the filter element 3 and moves to the clean side S2, and is further returned from the outflow port 6 to the engine.

In the filter device 1 described above, the filter element 3 is formed not only in the radial direction but also in the axial direction.
It can be configured to exhibit a filtering function even for fluid (oil) flowing from b and 3c. Alternatively, axial ends 3
By making the density of b, 3c higher than other parts, it is possible to substantially prevent oil from entering the element from both axial ends 3b, 3c.

Therefore, both ends 3 of the filter element 3
It is not necessary to seal b and 3c with separate members, and the structure of both ends 3b and 3c of the filter element 3 can be simplified as compared with the conventional case. Taking advantage of this advantage, one end 3b of the filter element 3 directly abuts against the inner bottom surface 2a of the case 2, and only the element pressing member 11 and the packing 10 are provided on the other end 3c side. The structure in the case is simplified, and as a result, the filter device 1 can be made compact. In particular, the overall height of the filter device 1 (the dimension of the filter device 1 in the axial direction of the filter element 3) can be reduced.

FIG. 4 shows a filter device according to a second embodiment of the present invention. The filter device 1 is characterized in that its dimensions are enlarged in the radial direction as compared with the filter device 1 of FIG. 1 described above, and that an oil cooler 20 as a heat exchanger is arranged inside the filter element 3. The same parts as those in FIG.

The oil cooler 20 cools the engine oil, and has an inflow pipe 21 and an outflow pipe 22 penetrating the case 2, and a cooling section 23. As shown in detail in FIG. 5, the cooling unit 23 includes a number of cooling modules 2.
4 are laminated in a certain direction. Each cooling module 24 is configured by joining ring-shaped plate members 25 and 26. Ring-shaped grooves 25a, 26a are formed at the center in the width direction of the respective plate members 25, 26, and these grooves 25a, 2 are formed.
By joining the plate members 25 and 26 with the 6a turned in the opposite direction, a ring-shaped oil flow path 24a is formed in each cooling module 24. The inner and outer edges of the plate members 25 and 26 are in close contact with each other, thereby forming cooling fins 24b and 24c. In addition, each module 24
Are connected to each other by a connection path 24d formed through the plate members 25 and 26. The oil passage 24 a in the uppermost module 24 is connected to the inflow pipe 21 and the outflow pipe 22.

The oil guided from the inflow pipe 21 to the cooling unit 23 diffuses into the oil passage 24a of each module 24, and exchanges heat with the oil in the clean side S2 to be cooled. Then, the cooled oil is returned from the outflow pipe 22 to the engine. The oil cooler 20 may be fixed to the case 2 using fixing means such as welding, or may be supported using the element pressing member 11.

As described above, according to the filter device of the present invention, the structure inside the case is simplified, so that a relatively large structure such as the oil cooler 20 can be easily accommodated in the case 2. There is an advantage that the overall height of 1 does not increase. The oil cooler 20 may be provided on the outer periphery of the filter element 3 as shown in FIG. The hollow portion 3a of the filter element 3 may have a shape with one end closed as shown in FIG.

The slurry raw material used for the filter element 3 is constituted by dispersing water in a fiber raw material obtained by mixing a linter and a synthetic fiber, for example. As the synthetic fiber, for example, polytetrafluoroethylene (PET), acrylic, nylon, aramid, or the like can be used. Instead of or in addition to the synthetic resin, chemical fibers such as rayon, wood or non-wood pulp, inorganic powders such as calcium carbonate, alumina, and silica, and inorganic fibers such as glass fiber and rock wool can be used.

The filter element 3 is not limited to an example constituted by a single molded body element. The filter element 3 may be constructed by stacking a plurality of molded body elements 3A... 3A as shown in FIG. In this case, the molded body elements 3A may or may not adhere to each other. In the case of bonding, various bonding means such as bonding with an adhesive, welding, or hot melt resin can be used. The densities of the molded body elements 3A may be equal to each other or may be changed.

The present invention can be applied not only to a filter for filtering engine oil but also to a filter used for filtering various liquids and gases. "Molded element" in the present invention
Is a concept including both a formed body formed by dewatering and pressing a slurry-like raw material obtained by dispersing fibers in a liquid, and an element obtained by processing the formed body.

[0030]

As described above, according to the present invention, one end of the filter element is directly attached to the inner bottom surface of the case by taking advantage of the molded element formed by dewatering and pressing the slurry-like fiber material. Since the pressing is performed, an excellent effect of simplifying the internal structure of the filter and providing a compact and inexpensive filter can be obtained.

[Brief description of the drawings]

FIG. 1 is a sectional view of an oil filter according to a first embodiment of the present invention.

FIG. 2 is an enlarged view showing the vicinity of an outlet of the filter of FIG. 1;

FIG. 3 is a plan view of an element pressing member used in the filter of FIG. 1;

FIG. 4 is a sectional view of an oil filter according to a second embodiment of the present invention.

FIG. 5 is a partially enlarged view of an oil cooler used in the filter of FIG.

FIG. 6 is a diagram showing a modification of the oil filter of FIG.

FIG. 7 is a view showing a modification of the oil filter of FIG. 1;

[Explanation of symbols]

 Reference Signs List 1 filter device 2 case 2a inner bottom surface of case 3 filter element 3A molded element 3a hollow portion 3b one end of filter element 3c other end of filter element 4 set plate 5 closure plate 6 outflow port 7 inflow port 9 packing 10 packing 10a lip 11 holding plate 20 oil cooler (interior parts)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) F01M 11/03 F02M 37/22 G B01D 29/10 510C 510E F02M 37/22 510G 520E 530B 29/14 C 29 / 26 B 35/02 EF term (reference) 3G015 BG15 BG16 DA07 4D019 AA01 AA03 BA11 BA12 BA13 BB01 BB05 BB18 CA03 CA05 CB01 CB02 CB06 CB10 4D064 AA23 BM03 BM04 BM13 BM36

Claims (5)

[Claims] A filter element including a compact formed by dehydrating and pressing a slurry-like raw material obtained by dispersing fibers in a liquid; a cylindrical case having a bottom for housing the filter element; A fluid filter, comprising: a sealing member for closing an opening; and an element pressing member provided between the sealing member and the filter element to press one end of the filter element against an inner bottom surface of the case. 2. The filter according to claim 1, wherein an outlet of the filtered fluid is provided at the center of the sealing member, and the element pressing member has a ring shape surrounding the outlet. 3. The fluid filter according to item 1. 3. The fluid filter according to claim 2, wherein a packing is provided between the element pressing member and the sealing member so as to surround the outlet. 4. The fluid filter according to claim 1, wherein an interior part is provided on an inner periphery or an outer periphery of the filter element. 5. The fluid filter according to claim 4, wherein a heat exchanger is provided as the interior component.