JP2003214270A - Fluid filter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To uniformly collect foreign matters of various sizes over the whole filter medium. <P>SOLUTION: A required number of projected pressing parts 46 projected toward a housing part 26 for housing a filter medium 30 are formed on the inner wall surface of a case body 20 provided with an inlet hole 22 and an exhaust hole 24 for fluid opened therein. By pressing each pressing part 46 onto the filter medium 30 housed in the housing part 26 for compressing it, a compression part 32 having high collection efficiency of foreign matters mixed into the fluid is arbitrarily formed in the filter medium 30. Thereby, the foreign matters having various sizes are uniformly collected over the whole filter medium 30. The compression degree of the compression part 32 can be changed corresponding to the projecting amount of the projection part 46, and the collection efficiency of foreign matters is increased as the compression degree of the compression part 32 becomes larger. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fluid filter, and more specifically, a case body having fluid inlets and outlets at required positions, and a porous body having appropriate elasticity as materials. And a filter medium that is detachably accommodated in an accommodating portion defined inside the case body, and allows a fluid introduced into the case body from the introduction port to pass through the filter medium to remove fine foreign matter mixed in the fluid. The present invention relates to a fluid filter that collects and purifies fluid and discharges it from the discharge port.

[0002]

2. Description of the Related Art For example, in various devices utilizing gas such as air and gas or liquid such as oil, such as air purifier, automobile engine, fluid pressure cylinder (hereinafter, gas and liquid are collectively referred to as "fluid"). 10), as shown in FIG. 10, a fluid filter 10 for collecting fine foreign matter (dust, dust, etc.) mixed in the fluid and cleaning the fluid is provided in the device 12. It is often mounted on the fluid introducing unit 14. Various types and types of the fluid filter 10 are put into practice, but as shown in FIG. 11, for example, a fluid inlet 22 and a fluid outlet 2 are provided at required positions.
4, a filter case (case body) 20 and a filter medium 30 which is made of a porous body having an appropriate elasticity and which is detachably housed in a housing portion 26 defined inside the filter case 20. The fluid introduced from the inlet 22 into the filter case 20 is passed through the filter medium 30 to collect fine foreign matter mixed in the fluid, and the cleaned fluid is discharged from the outlet 24. It has become.

Here, the filter medium 30 is a so-called "porous body" having a large number of pores (voids), such as a sponge or urethane foam having an open-cell structure, a nonwoven fabric or a fiber aggregate.
However, the dispersion mode and the pressure loss change depending on the density of the filter medium 30 (opening size and number of formation of voids), which affects the collection efficiency of foreign substances mixed in the fluid. Has become. For example, in FIG. 12, the density is low
FIG. 13 is a structural cross-sectional view of the fluid filter 10 in which the filter medium 30 made of a porous body (so-called “coarse” in which the opening size of each void is formed large) is implemented, and FIG. 13 shows high density.
FIG. 1 is a cross-sectional view of a configuration of a fluid filter 10 in which a filter medium 30 made of a porous material (so-called “fine mesh” in which the opening size of each void is formed small) is implemented. Here, in the fluid filter 10 shown in FIG. 12, since the filter medium 30 has coarse meshes, the fluid easily passes through the filter medium 30. Therefore, the pressure loss is reduced and the foreign matter S is appropriately dispersed in the entire filter medium 30. Although the particles are dispersed and collected, the foreign matter S having a size smaller than the void passes through without being collected, and the collection efficiency is not improved, so that the fluid cannot be properly cleaned. .

On the other hand, in the fluid filter 10 shown in FIG. 13, the foreign matter S having a considerably fine size can be collected due to the fine mesh of the filter medium 30. However, since it is difficult for the fluid to pass through the filter medium 30, the pressure loss increases, while the foreign substances S having various sizes are intensively collected at the portion of the filter medium 30 facing the inlet 22. There was an inherent defect that the particles could not be collected on average over the whole and clogging occurred in a short period of time.

[0005]

In order to solve the above-mentioned drawbacks, therefore, as shown in FIG. 14 or 15, a first filter medium 30A made of a porous material having a low density (coarse grains) and the first filter medium 30A are used. By combining with the second filter medium 30B composed of a porous body having a density higher than that of 30A (fine mesh), the first filter medium 3
A fluid filter 10 is also implemented in which the foreign matter S having a large size is collected at 0 A and the foreign matter S having a small size is collected at the second filter medium 30B. In such a fluid filter 10, foreign matter having various sizes is set by setting the first filter medium 30A on the introduction port 22 side and setting the second filter medium 30B on the discharge port 24 side of the housing portion 26 of the filter case 20. S can be collected while being dispersed appropriately.

However, since two or more types of filter media 30 (30A, 30B) having different densities are used, a molding operation for processing each filter media 30 into a required shape and size is required. There was a drawback that increased costs. In addition, the first filter medium 30A and the second filter medium 3
Since the density changes rapidly at the boundary with 0B, the first filter medium 3
The foreign matter S that has not been collected at 0A is intensively collected on the outer surface of the second filter medium 30B, and the foreign matter S is collected on each of the filter mediums 3B.
Since the particles could not be collected on average over the entire 0A and 30B and the pressure loss could not be minimized, there was still a problem to be solved in order to improve the collection efficiency.

[0007]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned problems inherent in the prior art described above, and is proposed in order to suitably solve the problems. A single pressing member provided on the inner wall surface of the case body (EN) A fluid filter constituted so that foreign matters having various sizes can be uniformly collected over the entire filter medium by arbitrarily compressing the filter medium (1) to arbitrarily create a compressed portion in which the foreign matter collection rate is increased. The purpose is to

[0008]

SUMMARY OF THE INVENTION In order to solve the above problems and achieve the intended purpose, the present invention has a case body having a fluid inlet and a fluid outlet at required positions and an appropriate elasticity. A filter material made of a porous body and detachably accommodated in a housing part defined inside the case body, and a fluid introduced into the case body from the inlet is passed through the filter medium to be mixed with the fluid. In a fluid filter configured to collect fine foreign matter that has been discharged and discharge a cleaned fluid from the discharge port, the filter medium housed in the housing part can be compressed on the inner wall surface of the case body. By providing a pressing portion and pressing the pressing portion against the filter medium stored in the storage portion to compress, a compression site having an increased collection rate of the foreign matter is arbitrarily created in the filter medium, and the foreign matter has a dimensional difference. Even if there is a Characterized by being configured to be to collect.

Similarly, in order to solve the above problems and achieve the intended purpose, another invention is to provide a case body having a fluid inlet and a fluid outlet at required positions and a porous body having an appropriate elasticity. A filter material that is detachably housed in a housing part defined inside the case body, and allows the fluid introduced into the case body from the inlet to pass through the filter material and be mixed in the fluid. In a fluid filter configured to collect various foreign substances and discharge the cleaned fluid from the discharge port, a required number of convex pressing portions projecting toward the accommodating portion on the inner wall surface of the case body. And pressing the pressing portion against the filter medium stored in the storage portion to compress the filter medium, thereby arbitrarily creating a compression site in the filter medium having a higher collection rate of the foreign matter, and the foreign matter has a dimensional difference. Also averaged over the entire filter media Characterized by being configured to be.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Next, a fluid filter according to the present invention will be described below with reference to the accompanying drawings with reference to preferred embodiments.

[0011]

[First Embodiment] FIG. 1 is a vertical sectional side view schematically showing a fluid filter according to a first embodiment, FIG. 2 is a vertical sectional side view showing a fluid filter in an operating state, and FIG. 3 is an exploded view of the fluid filter. It is a perspective view. The fluid filter 40 according to the first embodiment is
A filter case (case body) 20 in which a fluid inlet 22 and a fluid outlet 24 are opened at required positions, and a porous body having an appropriate elasticity as a material are provided in a storage portion 26 defined inside the filter case 20. A single (1
(Type) filter medium 30. In this example, a urethane foam having an open cell structure is exemplified as the porous body, and the porous body in the present application means sponge, nonwoven fabric, fiber aggregate (plastic, inorganic material, metal etc.) in addition to the urethane foam. (Formed from) and the like are also included.

The filter case 20 is composed of a tray-shaped first half body 42 and a tray-shaped second half body 44, and the first half body 42 and the second half body 44 are assembled to face each other. Is in the shape of a rectangular box, and defines a storage portion 26 for the filter medium 30 therein. A laterally long inlet 22 is provided at one side portion of the first half body 42 to allow the fluid to flow into the housing portion 26, and at one side portion of the second half body 44. , The housing portion 26
A horizontally long outlet 24 is provided to allow the fluid inside to flow out of the case. When the first half body 42 and the second half body 44 are assembled, the introduction port 22 is provided at the right end portion of the lower surface of the filter case 20 in FIG.
Is opened, and the discharge port 24 is opened at the left end portion of the upper surface of the filter case 20, and the fluid introduced into the filter case 20 through the introduction port 22 is supplied from one end to the other end in the accommodating portion 26. Outlet 24 after moving to
To the outside of the filter case 20.

On the inner wall surface of the first half 42, a required number of convex pressing portions projecting toward the accommodating portion 26 so that the filter medium 30 accommodated in the accommodating portion 26 can be compressed. The portion 46 is formed, and as will be described later, the pressing portion 46 is pressed against the filter medium 30 accommodated in the accommodating portion 26 to compress the filter medium 30 to thereby increase the collection rate of the foreign matter S 32.
Has a structure that can be arbitrarily created in the filter medium 30.
Here, the pressing portion 46 is a rib-shaped protrusion 48 provided on the filter case 20, and a plurality (9 in the embodiment) are arranged at appropriate intervals from the inlet 22 to the outlet 24. It is set up. Moreover, in each rib-shaped protrusion 48, the protrusion amount of the rib-shaped protrusion 48 adjacent to the introduction port 22 is minimized,
The amount of protrusion of the pressing portion 46 adjacent to the discharge port 24 is maximized, and the amount of protrusion is set to gradually increase from the introduction port 22 side toward the discharge port 24 side. In such a configuration, the degree of compression of the compression portion 32 of the filter medium 30 is changed according to the amount of protrusion of each rib-shaped protrusion 48.
Specifically, as the protruding amount of the rib-shaped protruding piece 48 is increased, the amount of compressive deformation of the filter medium 30 is increased and the compressed portion 32 is compressed.
Will have a higher density.

The filter medium 30 is made of, for example, urethane foam which is a porous body having an open-cell structure, and is formed into a rectangular parallelepiped which matches the rectangular housing portion 26 defined in the filter case 20 ( FIG. 3) is a foam-molded product of this shape, or a raw material foam-molded into a large plate shape and cut into this shape. Such a filter medium 30
Has a large number of open cell pores (voids) formed during foam molding inside and is rich in elasticity and flexibility,
In the normal state, the density is generally the same, and all the open cell pores (voids) have substantially the same size. When the filter medium 30 is pressed from the outside, the pressed part is easily compressed and deformed, and the density of the compressed part becomes higher than the density of the non-compressed part, and the open cell pores (voids) of the compressed part are crushed. Since it is made smaller, it is possible to collect a smaller foreign matter S. The filter medium 30 is determined according to the fluid (gas or liquid) to be cleaned, and detailed description thereof is omitted here.

In the fluid filter 40 of the first embodiment constituted by the filter case 20 and the filter medium 30 as described above, as shown in FIG. 4, the filter medium 30 is sandwiched between the first half body 42 and the second half body. By attaching 44, both halves 4
The filter medium 30 is housed in the housing portion 26 defined inside the filter case 20 composed of 2,44. Here, when assembling the first half 42 and the second half 44, the first half 4
The rib-shaped protrusions 48 formed in 2 are pressed against the outer surface of the filter medium 30 accommodated in the accommodating portion 26, the filter medium 30 is compressed, and the compression portion 32 in which the collection rate of the foreign matter S is increased intentionally. Produced in. Moreover, since the protruding amount of the rib-shaped protruding piece 48 is set as described above, the filter medium 30
The thickness of the compression part 32 created in the direction gradually decreases from the inlet 22 side toward the outlet 24 side, and the compression degree of the filter medium 30 gradually increases from the inlet 22 toward the outlet 24. Therefore, it is possible to collect the foreign matter S having a smaller size as it approaches the discharge port 24 side.

That is, the fluid filter 40 of the first embodiment.
Is a single (one type) filter medium 30 made of urethane foam that is foam-molded to have the same density as a whole by pressing and compressing the rib-shaped protrusions 48 protruding in the filter case 20, Compressed portion 32 with increased collection rate of the foreign matter S
By using a single filter medium 30, it is possible to obtain the same or higher collection performance as when using a plurality of filter media having different densities (different collection rates). Thereby, the collection efficiency of the foreign matter S can be suitably improved at low cost.

Therefore, in the fluid filter 40 of the first embodiment, as shown in FIG. 2, even if the fluid introduced from the inlet 22 into the filter case 20 contains foreign matters S having various sizes (dimensions), the foreign matter S is mixed. The foreign material S having a large size is collected at a portion of the filter medium 30 facing the inlet 22, and the foreign material S having a smaller size is sequentially collected as the filter material 30 approaches the outlet 24 side. That is, even if there is a dimensional difference in the foreign matter S mixed in the fluid, the foreign matter S can be collected evenly over the entire filter medium 30 because the portion to be collected differs depending on the size. Collection efficiency can be improved suitably. Further, since the foreign matter S is not concentrated and collected on a part of the filter medium 30, the smooth flow of the fluid passing through the filter medium 30 is maintained and the pressure loss can be minimized.

In the fluid filter 40 of the first embodiment,
As shown in FIG. 2, the rib-shaped protrusions 48 are formed below the inside of the filter case 20, and an appropriate space 49 is defined between the rib-shaped protrusions 48. A part of the foreign matter S collected at the compression portion 32 of the filter medium 30 falls into the space 49 and accumulates. Therefore, the time until the occurrence of clogging of the filter medium 30 becomes long, so that the replacement cycle or cleaning cycle of the filter medium 30 can be set long.

[0019]

[Second Embodiment] FIG. 5 is a vertical sectional side view schematically showing a fluid filter according to a second embodiment, FIG. 6 is a vertical sectional side view showing the fluid filter in an operating state, and FIG. 7 is an exploded view of the fluid filter. FIG. The fluid filter 50 according to the second embodiment has the basic configuration of the fluid filter 4 of the first embodiment.
0, but the first half 42 of the filter case 20
The form of the pressing portion 46 provided in the above is modified.

That is, in the fluid filter 50 of the second embodiment, the outer wall surface of the filter case 20 is formed in an uneven shape so that the filter medium 30 housed in the housing portion 26 can be compressed, and the pressing portion 46 is formed. The convex wall portion 52 is formed as a part of the outer wall surface, and the foreign matter S is collected by pressing the convex wall portion 52 against the filter medium 30 accommodated in the accommodating portion 26 and compressing it. The structure is such that the compression portion 32 with a higher rate is arbitrarily created. Here, the convex wall portion 5
A plurality of 2 (7 in the embodiment) are arranged in parallel at appropriate intervals from the inlet 22 to the outlet 24. Moreover, in each convex wall portion 52, the convex wall portion 5 adjacent to the introduction port 22
The protrusion amount of 2 is the minimum, the protrusion amount of the convex wall portion 52 adjacent to the discharge port 24 is the maximum, and the protrusion amount is set to gradually increase from the introduction port 22 side toward the discharge port 24 side. Has been done. Therefore, similarly to the first embodiment, the degree of compression of the compression portion 32 of the filter medium 30 is changed corresponding to the amount of protrusion of each convex wall portion 52. Specifically, the amount of protrusion of the convex wall portion 52 is changed. The larger the size, the larger the amount of compressive deformation of the filter medium 30 and the higher the density of the compressed portions 32.

In the fluid filter 50 of the second embodiment constituted by the filter case 20 and the filter medium 30 as described above, as shown in FIG. 7, the first half body 42 and the second half body are sandwiched by the filter medium 30. By attaching 44, both halves 4
The filter medium 30 is housed in the housing portion 26 defined inside the filter case 20 composed of 2,44. Here, when assembling the first half 42 and the second half 44, the first half 4
Each of the convex wall portions 52 formed in 2 is pressed against the outer surface of the filter medium 30 accommodated in the accommodating portion 26, the filter medium 30 is compressed, and the compression portion 32 in which the collection rate of the foreign matter S is increased intentionally. Produced. Moreover, the degree of compression (compressive deformation amount) of the filter medium 30 gradually increases from the inlet 22 toward the outlet 24, so that the foreign matter S having a smaller size is collected as it approaches the outlet 24 side. It is possible.

Therefore, in the fluid filter 50 of the second embodiment, as shown in FIG. 6, when the fluid introduced from the inlet 22 into the filter case 20 contains foreign substances S having various sizes (dimensions). However, the foreign matter S having a large size is collected at the portion of the filter medium 30 facing the inlet 22, and the foreign matter S having a smaller size is sequentially collected as it approaches the outlet 24 side. That is, even if there is a dimensional difference in the foreign matter S mixed in the fluid, the foreign matter S can be collected evenly over the entire filter medium 30 because the portion to be collected differs depending on the size. Collection efficiency can be improved suitably. Further, since the foreign matter S is not concentrated and collected on a part of the filter medium 30, the smooth flow of the fluid passing through the filter medium 30 is maintained and the pressure loss can be minimized.

In the fluid filter 50 of the second embodiment,
As shown in FIG. 6, since the respective convex wall portions 52 are formed below the inside of the filter case 20, and an appropriate space 54 is defined between the respective convex wall portions 52,
A part of the foreign matter S collected at the compression portion 32 of the filter medium 30 falls into the space 54 and accumulates. Therefore, the time until the occurrence of clogging of the filter medium 30 becomes long, so that the replacement cycle or cleaning cycle of the filter medium 30 can be set long.

In the fluid filters 40, 50 shown in the first and second embodiments, a required number of convex pressing portions 46 (rib-shaped protrusions 4) provided on the inner wall surface of the filter case 20.
8, the convex wall portion 52) is arranged in parallel on one side of the housing portion 26 and the filter medium 30 is compressed from one direction to compress the compressed portion 3
The example of producing 2 is illustrated. However, the compression portion 32 in which the collection rate of the foreign matter S is increased by pressing the pressing portion 46 against the filter medium 30 housed in the housing portion 26 to compress it.
In order to arbitrarily create the above, for example, like the fluid filter 56 shown in FIG. 8, the pressing portions 46 may be arranged side by side on the accommodation portion 26 and the filter medium 30 may be compressed from both directions.

Further, the pressing portions 46 are juxtaposed on both sides of the accommodating portion 26, and the filter medium 30 is compressed from both directions to compress the compressed portion 3
2 is produced, as shown in FIG.
The pressing portions 46 provided on one side and the pressing portions 46 provided on the other side of 6 may be arranged so as to be alternately located. By disposing the pressing portions 46 in this way, the filter medium 30 is alternately pressed from both directions and compressed, and the fluid passage formed by the housing portion 26 exhibits a so-called "labyrinth structure". Further improvement of the collection efficiency of the foreign matter S mixed in the fluid can be expected.

Further, each of the fluid filters 40, 50, 56
Then, by appropriately setting and changing the protruding amount, the disposition position, the disposition number, the disposition interval, and the like of each pressing portion 46 (rib-shaped protrusion 48, convex wall portion 52), the compression portion 32 of the filter medium 30 can be changed. The degree of compression (compression deformation amount) can be adjusted in various ways.

Here, the accommodating portion 26 of the filter case 20.
The form of the pressing portion 46 capable of compressing the filter medium 30 housed in
The present invention is not limited to the one projecting in parallel toward the housing portion 26 as illustrated in the first and second embodiments.
For example, when the compression deformation amount of the compression portion 32 of the filter medium 30 housed in the housing portion 26 of the filter case 20 gradually increases from the inlet 22 toward the outlet 24 (FIGS. 1 and 5) Although not specifically shown in the figure, the entire wall surface of the first half body 42 of the filter case 20 is formed as an inclined wall that rises to the left in FIG.
The filter medium 30 may be compressed on the entire wall surface.

Further, the porous body constituting the filter medium 30 of the present application is not limited to the urethane foam having the open cell structure exemplified in each of the above-mentioned examples, as described above.
Other than this, sponge, non-woven fabric, fiber aggregate (those formed of plastic, inorganic substance, metal, etc.) and the like can also be suitably implemented.

Furthermore, the fluid filter of the present application is not limited to the rectangular shape shown in the first and second embodiments, and it goes without saying that it can be formed in various shapes and sizes. .

[0030]

As described above, according to the fluid filter of the present invention, the inner wall surface of the case body is formed on the single (one type) filter medium composed of the porous body molded to have the same overall density. By pressing the pressing portion provided in the, it is possible to arbitrarily create a compression site that compresses the filter medium to increase the collection rate of foreign matters, and even if a single filter medium is used, Collection efficiency equal to or higher than that when a plurality of filter media having different ratios are used can be obtained. Then, since the degree of compression of the compression portion of the filter medium is changed in accordance with the amount of protrusion of the pressing portion, a very useful effect of enhancing foreign material collection performance can be achieved at low cost. Therefore, even if there is a dimensional difference in the foreign matter mixed in the fluid, the foreign matter can be collected evenly over the entire filter medium, because the collected portion differs depending on the size. Further, since the foreign matters are not concentrated and collected on a part of the filter medium, the smooth flow of the fluid passing through the filter medium is maintained and the pressure loss can be minimized. The pressing portion is a rib-shaped protruding piece provided in the case body, a convex wall portion forming an outer wall surface of the case body, or the like. Further, the pressing portion may be arranged side by side on one side of the accommodating portion defined in the case body to compress the filter medium from one direction, or arranged on both sides of the accommodating portion to compress the filter medium from both directions. By doing so, it is possible to preferably create a compressed portion in the filter medium.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view schematically showing a fluid filter according to a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional side view showing the fluid filter shown in FIG. 1 in an operating state.

FIG. 3 is an exploded perspective view of a fluid filter.

FIG. 4 is a cross-sectional view showing a state in which the filter medium is housed in a housing portion defined by the filter case by assembling the filter case by assembling the first half body and the second half body.

FIG. 5 is a vertical sectional side view schematically showing a fluid filter according to a second embodiment of the present invention.

6 is a vertical cross-sectional side view showing the fluid filter shown in FIG. 5 in an operating state.

FIG. 7 is a cross-sectional view showing a state in which the filter medium is housed in a housing portion defined by the filter case by assembling the filter case by assembling the first half body and the second half body.

FIG. 8 is a vertical cross-sectional side view schematically showing another form of fluid filter.

FIG. 9 is a vertical cross-sectional side view schematically showing still another form of fluid filter.

FIG. 10 is a schematic view of an apparatus equipped with a fluid filter.

FIG. 11 is a cross-sectional view showing a state in which the filter medium is housed in a housing part defined by the filter case by assembling the filter case by assembling the first half body and the second half body.

FIG. 12 is a vertical cross-sectional side view showing a conventional fluid filter configured by housing a single coarse filter medium in a filter case.

FIG. 13 is a vertical cross-sectional side view showing a conventional fluid filter configured by housing a single filter medium having fine meshes in a filter case.

FIG. 14 is a vertical cross-sectional side view showing a conventional fluid filter configured by accommodating a first filter medium having coarse mesh and a second filter medium having fine mesh in a filter case.

FIG. 15 is a vertical cross-sectional side view showing a conventional fluid filter configured by accommodating a first filter medium having coarse mesh and a second filter medium having fine mesh in a filter case.

[Explanation of symbols]

20 filter case (case body) 22 Inlet 24 outlet 26 Housing 30 filter media 32 Compressed part 46 Pressing part 48 Rib-shaped protrusion (pressing part) 52 Convex wall part (pressing part)

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁷ Identification code FI theme code (reference) B01D 46/10 F01M 11/03 B F01M 11/03 B01D 29/12 EF term (reference) 3G015 BG00 EA05 4D019 AA01 AA03 BA11 BA13 BB03 BB07 CA10 CB02 4D058 JA12 JB14 JB25 JB28 KA01 KA11 KA25 KA30 KC32

Claims (10)

[Claims] 1. A case body (20) having a fluid inlet (22) and a fluid discharge port (24) at required positions, and a porous body having an appropriate elasticity as a material, and the case body (20). And a filter medium (30) that is detachably accommodated in the accommodating portion (26) defined inside, and allows the fluid introduced from the introduction port (22) to the case body (20) to pass through the filter medium (30). In the fluid filter, which collects fine foreign matter mixed in the fluid, and discharges the cleaned fluid from the discharge port (24), the inner wall surface of the case body (20), A pressing portion (46) capable of compressing the filter material (30) housed in the housing portion (26) is provided, and the pressing portion (4) is mounted on the filter material (30) housed in the housing portion (26).
By pressing and compressing 6), a compression site (32) with an increased collection rate of the foreign matter is arbitrarily created in the filter medium (30), and even if the foreign matter has a dimensional difference, the filter medium (30) A fluid filter characterized in that it is configured so that it can be collected evenly over the whole. 2. A case body (20) having a fluid inlet (22) and a fluid outlet (24) opened at required positions, and a porous body having an appropriate elasticity as a material, and the case body (20). And a filter medium (30) that is detachably accommodated in the accommodating portion (26) defined inside, and allows the fluid introduced from the introduction port (22) to the case body (20) to pass through the filter medium (30). In the fluid filter, which collects fine foreign matter mixed in the fluid, and discharges the cleaned fluid from the discharge port (24), the inner wall surface of the case body (20), A required number of convex pressing portions (46) projecting toward the storage portion (26) are provided, and the pressing portion (4) is attached to the filter medium (30) stored in the storage portion (26).
By pressing and compressing 6), a compression site (32) with an increased collection rate of the foreign matter is arbitrarily created in the filter medium (30), and even if the foreign matter has a dimensional difference, the filter medium (30) A fluid filter characterized in that it is configured so that it can be collected evenly over the whole. 3. The degree of compression of the compression portion (32) of the filter medium (30) is changed according to the amount of protrusion of the pressing portion (46),
The fluid filter according to claim 1 or 2, wherein the collection rate of the foreign matter is set to increase as the degree of compression of the compression portion (32) increases. 4. A plurality of pressing portions (46) are juxtaposed at appropriate intervals from the introduction port (22) to the discharge port (24) and are adjacent to the introduction port (22). The compression amount of the compression portion (32) is reduced by minimizing the amount of protrusion of the compression portion (46) and the amount of protrusion of the pressing portion (46) adjacent to the discharge port (24).
The fluid filter according to claim 3, wherein the fluid filter is set to gradually increase from the discharge outlet (24) to the discharge outlet (24). 5. The pressing portion (46) is arranged in parallel on one side of the accommodating portion (26) so as to compress the filter medium (30) from one direction. The fluid filter described in 1. 6. The pressing portion (46) is arranged in parallel on both sides of the housing portion (26) so as to compress the filter medium (30) from both directions. The described fluid filter. 7. The pressing part (46) provided on one side and the pressing part (46) provided on the other side of the accommodation part (26) are alternately located, and the filter medium (30) is staggered from both directions. The fluid filter according to claim 6, wherein the fluid filter is adapted to be compressed. 8. The fluid filter according to claim 1, wherein the pressing portion (46) is a rib-shaped protruding piece (48) provided in the case body (20). 9. The fluid filter according to claim 1, wherein the pressing portion (46) is a convex wall portion (52) forming an outer wall surface of the case body (20). 10. The fluid filter according to claim 1, wherein the filter medium (30) is formed of urethane foam, a nonwoven fabric, a fiber assembly or the like having an open cell structure.