JPH1033911A - Filter unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the problem that filtering efficiency is lowered, if a conventional filter is not replaced within a short period and that a liquid already filtered in recontaminated at the replacement of the filter material. SOLUTION: A filter unit 1 is constituted of a filter member 2, a casing lid member 3 capable of attaching and detaching the filter member 2 on one side and having a passage 4 capable of passing only a material to be filtered passed through the filter member to other side and making the filter member 2 detachable and a casing main body 5 detachable on the mounting side of the filter member of the casing lid 3 on its one side and having an opening part into which the filter member can be inserted and housing part 6 capable of housing the filter member 2 so as to leave a space around the filter member and having an opening part 8 finer than the filter member housing part 6 on its other side.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to a filter unit.

[0002]

2. Description of the Related Art Conventionally, a filter is provided at a tip of a suction side pipe portion of a pump pipe as a means for removing a solid substance in the liquid when sucking the liquid using a pump.
Various filters are known as such filters. For example, as a device for purifying solids such as hair, lint, and scale in the water in a bath tub, a pre-filter using urethane foam or the like as a filter material provided in a plane, and a metal filter or the like as a filter material and a main filter as a main filter. 2. Description of the Related Art A filter configured to perform planar filtration by combining filter media is known.

[0003]

However, in the above-mentioned conventional filter, the filter medium is clogged in a relatively short time during use, and the efficiency of liquid suction is reduced. And the need for replacement. Further, in the above-mentioned conventional filter, when the filter medium is washed or replaced, when the work of removing the filter medium is performed in a purified liquid, the dirt attached to the filter medium is diffused again into the already purified liquid. There was a drawback that it would be soiled as before. In the case of a filter that is used by being attached to a circulating hot water heater or the like, the operation of removing the filter medium must be performed in water that has already been purified to some extent.

The present invention has been made in order to solve the above-mentioned drawbacks of the prior art, and it is difficult to cause clogging for a long period of time, and it is easy to wash and replace the filter medium. An object of the present invention is to provide a unit-type filter that does not return dirt to liquid.

[0005]

SUMMARY OF THE INVENTION The present invention provides a filter and a passage which is detachable on one side and which allows only the portion of the material to be filtered which passes through the filter to pass to the other side. A casing lid body having a filter body detachably mounted thereon, and an opening portion on one side of the casing lid body on the side where the filter body is mounted, wherein the opening is detachable and the filter body can be inserted, and the filter body And a casing body having a narrower opening than the filter body housing portion on the other side. The gist is a filter unit.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. 1 and 2 are views showing an example of a filter unit of the present invention. FIG. 1 is a central vertical sectional view showing a state in which all members are attached to each other. FIG. 2 is a view showing a state in which each member is detached from each other. It is an exploded perspective view. In the figure, 1 is a filter unit, 2 is a filter, 3 is a casing lid, 4 is a filtrate passage, 5 is a casing body, 6 is a filter body accommodating section, 7 is an opening of the casing body on the casing lid mounting side, Reference numeral 8 denotes a narrow opening on the casing body. FIG.
The part surrounded by a square is a perspective view of the casing lid 3 viewed from the bottom side.

[0007] As shown in FIGS. 1 and 2, the filter unit 1 includes a filter body 2, a casing lid 3, and a casing body 5.

The filter 2 is made of a case 24 made of synthetic resin or the like.
Inside, a filter material 27 in which a flat filter material 27 is wound around the outer periphery of a core material 26 made of a synthetic resin or the like having a through hole 25 through which a material to be filtered can be formed is housed. As the filter medium 27, it is preferable to use a pad or the like made of a material used for an oil fence or the like.

FIGS. 3 and 4 are a view showing a state in which the case body 24 constituting the filter body 2 is torn from the tearing portion 21 and an enlarged view of a main part of the case body 24. FIG. As shown in FIGS. 1 to 4, the case body 24 has a through hole 20 on the side wall through which the material to be filtered can pass.
Is formed and a cylindrical body whose one end is closed is provided with a rupture portion 21 along the axis of the cylinder and a hinge portion 22 opposite to the rupture portion, and the cylindrical body is split from the rupture portion. (See FIG. 3), and a snap-fit mechanism 23 that can be mutually locked is provided on both sides of the tearing portion.

FIG. 4A is a partially enlarged view showing an example of the snap-fit mechanism 23, and FIG.
FIG. 4C is a cross-sectional view showing a state where the snap-fit mechanism 23 is fitted. Snap fit mechanism 2
4 includes a projection 23a and a fitting hole 23b into which the projection 23a can be fitted, as shown in FIGS. Protrusion 2
The fitting hole 2 is formed at the edge of the position facing the projection 23a.
3b is provided.

On the outer peripheral surface of the case body 24 of the filter body 2 at the mounting end 28 on the casing lid 3, a key-shaped locking projection 29 in which the horizontal end and the vertical upper end are fused is provided. The case body 2 of the casing lid body 3
4 At the mounting end 30, a locking groove 31a having a width just enough to allow the horizontal portion of the locking projection 29 to pass through.
Is formed, and the case body 24 is pushed into the casing lid 3 until the end thereof abuts so that the locking projection 29 is fitted into the locking groove 31a. The casing 24 is configured to be fitted to the casing lid 3 and then turned toward the distal end of the horizontal portion of the projection 29 so that the case body 24 can be attached to the casing lid 3.

The casing lid 3 is made of a synthetic resin or the like.
Case 2 of filter 2 passes through filter 2 of the material to be filtered.
4 has a filtrate passage 4 that allows only the portion from the mounting end 30 toward the casing lid 3 to pass through the opposite side of the casing lid 3. That is, the passage 4 is provided within a range where the filter body 2 is in close contact with the casing lid 3. The passage 4 has a mesh structure or the like.

An outer peripheral surface of an end 30 of the casing lid 3 on the side of attachment to the casing body 5 (an end on the side on which the filter 2 is attached) 30 is a key in which a horizontal end and a vertical upper end are fused. A locking groove 32 having a shape of
2, a locking claw 33 is provided on the inner side wall (the lower side wall surface in the figure) of the horizontal portion.
Is provided on the inner wall surface of the casing lid 3 mounting side end portion 50 with a locking projection 51 just enough to pass through the locking groove 32 and an opening through which the filter can be inserted. And a filter body housing part 6 having a filter body 2 and capable of housing the filter body 2 while leaving a space around it.
After the filter body 2 is accommodated in the locking groove 3, the locking projection 51 is inserted into the locking groove 3.
2, the casing main body 5 is pushed over the casing lid 3 until the end of the casing body 5 abuts on the casing main body 5, is fitted into the casing lid 3, and is then turned in the direction of the tip of the horizontal portion of the projection 51, so that the locking claw 33 is turned on. The casing body 5 is turned over until the casing body 5 is further hit and the casing lid 3 is turned over.
It is constituted so that it can be attached to.

An end 34 of the casing lid 3 opposite to the end 30 on the side where the filter 2 is mounted is formed in a concave shape in which a concave portion 35 is formed in the center and a bank 36 is erected around the periphery. In addition, a key-shaped locking groove 37 in which the horizontal end and the vertical end are fused is formed on the inner wall surface of the bank 36.
At the tip of the locking groove 37, a locking recess 38 having a deep groove depth is provided. This casing lid 3
As shown in FIG. 5, a joint member 9 provided with a check valve 91 in the fluid passage is usually attached to the end 34 side. The joint member 9 is for connecting the water absorption pipe 10 connected to the water absorption pump (not shown) and the filter unit 1 so that the liquid can pass therethrough.

A lower end portion 92 of the joint member 9 is configured to be fitted into the recess 35 of the end portion 34 of the casing lid 3, and an outer peripheral surface of the lower end portion 92 is provided for locking the casing lid 3. A recess 38 which can be passed exactly through the groove 37 and
Is provided with a locking projection 93 that just fits into the
The joint member 9 is put on the casing lid 3 until the end thereof abuts so that the locking projections 93 are fitted into the locking grooves 37, and the joint member 9 is fitted into the casing lid 3. The joint member 9 can be mounted on the casing lid 3 by turning in the direction of the tip of the horizontal portion and fitting the locking projection 93 into the locking recess 38. At a predetermined position above the joint member 9, a suction cup 95 with an adjuster 94 is provided. The suction cup 95 is used for fixing to the inner wall of the bathtub, for example, as shown in FIG. The adjuster 94 is a screw-in type and is used for adjusting a gap between the adjuster 94 and a mounting surface.

The end of the casing main body 5 opposite to the end 50 on the casing lid 3 side is formed in a substantially cylindrical shape with a narrower opening than the filter body housing portion 6. An opening 8 that is narrower than the filter body housing 6 is provided. The opening surface of the opening 8 is oblique to the vertical direction of the casing body 5. The casing main body 5 is made of a synthetic resin or the like, and is generally cylindrical except for a portion having a narrower opening than the filter body housing portion 6.

A suction cup 53 with an adjuster 52 is provided at the lower end of the casing body 5 (the end on the opening 8 side). The suction cup 53 is used for fixing to a bottom surface in a bathtub, for example, as shown in FIG. The adjuster 52 is used for adjusting the height of the opening 8 from the bottom inside the bathtub.

The filter unit of the present invention can be used for various applications as a filter unit for various liquid filtrations in addition to a filter unit for an electric circulating water heater for a bathtub and the like.

[0019]

Next, the operation of the filter unit 1 described in the above embodiment will be described with reference to FIG. Water absorption pipe 1
The filter unit 1 is attached to the lower end of the joint member 9 attached to the lower end of the bathtub 60, and the suction cup 95 of the joint member 9 is adsorbed to the inner wall surface 61 of the bathtub 60 containing the water to be filtered. The filter unit 1 is fixed by positioning the opening 8 of the unit 1 close to the bottom surface 62 and adsorbing the suction cup 53, and the filter unit 1 is used in this state.

The liquid to be filtered sucked by a water suction pump (not shown) is sucked from the opening 8 into the filter housing 6 of the casing main body 5 as shown by the arrow in the figure. Then, the liquid to be filtered is passed through the filter medium 27 through the through hole 20 of the case body 24 of the filter body 2. At this time, foreign substances such as dust are adsorbed or caught by the filter medium 27. And filter media 2
Only the filtered filtrate after purification passes through 7.
The filtrate passes through the through-hole 25 of the core material 26, and then passes through the filtrate passage 4 of the casing lid 3, and pushes up the check valve 91 of the joint member 9 to flow to the water absorption pipe 10.

The foreign matter is attracted or caught by the filter medium 27 from the side of the casing lid 3 (that is, the upper side). As the filtration operation is continuously performed, the filtration proceeds from the upper part of the filter medium 27 gradually. , And the portion that participates in the filtering action due to the adsorption or catching of foreign matter gradually moves to the lower side of the filter medium 27.

According to the present invention, the passage pressure of the liquid to be filtered passing through the filter medium varies depending on the location of the filter medium, and the clogging of the filter medium does not proceed all at once over the entire surface of the filter medium. However, the lower portion does not cause clogging for a long period of time (a form of filtration exhibiting such an effect is hereinafter referred to as three-dimensional filtration with respect to planar filtration). Therefore, compared to the case where so-called flat filtration is employed, in which the entire surface of the filter medium is uniformly exposed to the passage pressure of the liquid to be filtered, so that the filter medium can be used for a long time without washing or replacement.

In this embodiment, since the filter body 2 has a hollow structure, the filtration resistance of the filtrate is small, the filtration efficiency is excellent, and the filter medium is easily cleaned because a flat filter medium is used. It is. In addition, the clogging of filter media is surely washed,
It can be removed and the filter media can be reused many times.

In this embodiment, the filter body 2, the casing lid 3, and the casing body 5 can be detached so as to be separated from each other. First, the entire filter unit 1 below the casing lid 3 is removed from the joint member 9 and taken out of the liquid to be filtered (dirty water) in the bathtub, and then the filter 2 is removed. It is possible to eliminate the fear that the stains diffuse again into the liquid to be filtered in the bathtub. To wash the dirty filter media, the casing lid 3 of the filter unit 1 is removed from the casing main body 5 by twisting, and then the filter body 2 fixed to the casing lid 3 is twisted to remove the casing lid. The filter body 2 is detached from the case body 24, the snap fit of the case body 24 of the filter body 2 is removed, and a member in the state where the filter medium 27 is wound around the core material 26 is taken out.
7 is removed, and the filter medium 27 is subjected to washing.

After the washing, the filter medium 27 is returned to the core material 26 again.
Then, the filter unit 1 is reconfigured by assembling in the reverse order to the above, and the filter unit 1 is attached to the joint member 9 and subjected to a filtering operation.

[0026]

The filter unit of the present invention is constructed as described above, and performs not three-dimensional filtration but three-dimensional filtration, so that the filtration efficiency is excellent and the filtration efficiency due to clogging even when used for a long time is improved. Since the filter medium can be used for a long period of time without lowering and without washing or replacing the filter medium, there is an effect that the labor for maintenance can be greatly reduced. In addition, since the filter body can be removed from the joint member while being integral with the casing lid and the casing main body, the dirt attached to the filter body at the time of washing and replacing the filter body has already been cleaned. There is no danger of re-diffusion in the liquid to be filtered, and there is no danger of impairing the cleaning effect of the filtration operation.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a central part showing an example of a filter unit of the present invention.

FIG. 2 is an exploded perspective view of the filter unit of FIG.

FIG. 3 is a perspective view showing a state in which a case body constituting the filter body is cleaved.

FIG. 4 is an enlarged view of a main part of a snap-fit mechanism of a case body constituting the filter.

FIG. 5 is an explanatory diagram for explaining an operation of the filter unit of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Filter unit 2 Filter body 3 Casing lid 4 Filtrate passage 5 Casing main body 6 Filter body accommodating part 7 Opening 8 Narrow opening

Claims (1)

[Claims] 1. A filter, comprising: a filter; and a passage which is detachable on one side and which allows only a portion of the material to be filtered passing through the filter to pass to the other side, and wherein the filter is detachable. A casing lid configured so as to be able to be attached and detached on one side on the filter body mounting side of the casing lid and having an opening through which the filter body can be inserted, and leaving the filter body with a space around it. A filter unit comprising: a filter body accommodating portion that can be accommodated; and a casing body having an opening with a narrower opening than the filter body accommodating portion on the other side.