JPH0690638A - Filter - Google Patents

Abstract

PURPOSE:To provide a filter designed to easily and variably regulate its ability at any desired time according to the volume of the water to be purified. CONSTITUTION:A filtering case is made up of (A) a basal case 31a, (B) at least one auxiliary case 31b connected detachably to the open lower end of the basal case and (C) a cover body U1 fitted detachably at the open lower end of the auxiliary case. This filtering case is housed with plural filtering units U2 mutually laminated corresponding to the basal case 31a and auxiliary case 31b, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a filtration device for raising ornamental fish such as goldfish, tropical fish, etc., which is installed in a water tank and receives suction air from an air pump to suction and filter water in the water tank. In particular, the present invention relates to a filter device in which cleaning and replacement of a filter material is easy.

[0002]

2. Description of the Related Art Conventionally, a filter case installed in a water tank is divided into upper and lower parts to form upper and lower filter chambers, a relatively dense filter medium is provided in the upper filter chamber, and a lower filter chamber is provided. A filtering device in which a coarse filtering material is provided and unpurified water is diverted and permeated through these filtering materials so as to obtain a high filtering capacity is already known (see Japanese Patent Publication No. 60-7932).

[0003]

By the way, in such a filter device, since dirt such as residual food and feces adheres to and deposits on the two filter media during use, the filter media should be washed regularly. Alternatively, it is necessary to replace the granular filter material such as pebbles or gravel as a coarse filter material, which is spilled or scattered from the filter container, which makes it difficult to perform the above work.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide the above-mentioned filtration device which can easily perform the cleaning and replacement work of the filtration material.

[0005]

In order to achieve the above-mentioned object, the present invention is a filtering device which is installed in a water tank and receives suction air from an air pump to suction-filter the water in the water tank. A first filtration unit, at least one second filtration unit stacked on the first filtration unit, and a cover unit that covers the second filtration unit and is detachably attached to the first filtration unit. In the first filtration unit, a granular filter material that also serves as a weight is enclosed in the closed case, a water absorption hole is opened on the bottom surface of the closed case, and a flow hole is opened on the upper surface. The second filtering unit is formed by winding a plate-like filter material in a tubular shape around a holding frame, and the first filter unit is passed through the flow hole inside the second filter unit. A purifying chamber that communicates with the air injection port and communicates with the air injection port, and an unpurified chamber that cooperates with the cover unit to define an unpurified chamber outside the purifying chamber. And a water suction hole communicating with the unpurified chamber are opened.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the filtration device of the present invention will be described below with reference to the drawings. FIG. 1 shows a state in which the filtration device F of this embodiment is installed in a water tank 1. F the first filtering unit U _1, the second filtration unit U ₂ which first placed on the filtration unit U _1, the second filtration unit U ₂ and by covering the first filtering unit U
_It is composed of a cover unit U ₃ which is detachably attached to ₁ .

As shown in FIG. 3, the first filtration unit U ₁ is provided with a saucer-shaped filter medium accommodating body 2 having a polygonal shape when viewed from a plane having an open upper surface. A pair of engagement pieces 3 are integrally formed on both sides of the outer side surface of the filter medium container 2, and a large number of support ribs 4 and four locking projections 5 are integrally formed on the inner side surface. . A large number of water absorption holes 6 are radially formed on the bottom surface of the filter medium container 2, and a short cylindrical air supply pipe 7 having an air injection port 7a is integrally formed at the center of the water absorption hole 6. As shown in FIG. 1, inside the air supply pipe 7 having a stepped portion 7b, a hollow air injection cylinder 8 made of a breathable material such as foamable synthetic resin and having a closed upper end is provided at the lower end thereof. The step portion 7b is brought into contact with and fitted. The hollow inside of the air supply pipe 7 is connected to the inner end of an air supply passage 9 formed integrally with the bottom surface of the filter medium container 2, and the outer end of the air supply passage 9 is opened to the side surface of the filter medium container 2. It A connector 10 is removably fitted to the outer end of the air supply passage 9 which is open to the side surface of the filter medium container 2, and the connector 10 is provided with an air supply pipe 11
Is connected to the air pump P via. Also, the air supply pipe 7
A plurality of support ribs 12 are integrally formed on the outer peripheral surface of the same at equal intervals in the circumferential direction (see FIG. 3).

The lid 14 of the filter body 2 is detachably attached to the upper opening of the filter medium store 2. That is, the recess 14a that can be engaged with the locking projection 5 of the filter medium container 2 is formed around the lid body 14, and the opening of the filter medium container 2 is formed by engaging these with each other. Is lid 1
Covered with 4. In this case, the back surface of the lid 14 is supported by the large number of support ribs 4 and 12. An air through hole 15 facing the air injection port 7a is formed in the center of the lid body 14, and a large number of through holes 16 are radially formed around the air through hole 15. The filter case 2 and the lid 14 constitute a closed case 17, and the closed case 17 is made of a small stone or the like that acts as a weight for preventing the filter F from rising. A coarse granular filter material 18 is enclosed.

The second filtration unit U ₂ placed on the closed case 17 is a dense plate-like member made of a holding frame 19 and a porous synthetic resin material wound around the holding frame 19 in a tubular shape. It is composed of a filter medium 20. As shown in FIG. 1 and FIG. 3, the holding frame 19 has a plurality of drain holes 21 formed in the center thereof and a star-shaped ceiling plate 22 when viewed from above and a polygonal bottom plate 23 when viewed from above. The bottom plate 23 has an opening portion 25 communicating with the air passage hole 15 of the lid body 14 at the center thereof, and a large number of through holes 26 around the opening portion 25. Are pierced radially. Ceiling plate 22
A plurality of locking projections 27 extending downward at equal intervals are integrally provided around the drainage port 21 on the lower surface of the bottom plate 2 and
Also on the upper surface of 3, a locking projection 28 is provided facing the locking projection 27.
Are projected integrally.

As shown in FIG. 2, the plate-like filter medium 20 has an inner peripheral surface on the connecting rod 24 and an outer peripheral surface on the ceiling plate 22.
And the locking projections 27 and 28 provided opposite to the bottom plate 23 are alternately locked and fixedly held by the holding frame 19, that is, the plate-like filtering material 20 is bent in a wave shape and is wound in a tubular shape. And is placed on the first filtration unit U _{1 in the} closed state. Further, a purification chamber 29 having a relatively large volume is formed inside thereof, which communicates with the inside of the closed case 17 through the circulation hole 16 and the communication hole 26 and also communicates with the air injection port 7a. The unpurified chamber 30 is defined in cooperation with the inner surface of the cover 31 for drainage, which will be described later, of the cover unit U ₃ .

The cover unit U ₃ is composed of a rectangular cylindrical drainage cover 31a, and a drainage pipe 32 connected to the purification chamber 29 is integrally projected at the center of the upper surface of the cover 31a. A large number of water-absorbing holes 33 communicating with the unpurified chamber 30 are radially formed therein. Drain cover 3
A pair of engaging claws 34, 34 capable of engaging with the engaging pieces 3, 3 of the filter medium container 2 are integrally formed on both sides of the lower end of the side surface of the la 1a. A notch 3 for inserting a connector 10 connected to the air supply passage 9 between 34
5 is formed.

Next, the operation of this embodiment will be described.

Now, as shown in FIG. 1, when the filtering device F constructed as described above is installed on the bottom surface of the water tank 1 on which pebbles and the like are laid and the air pump P is operated,
Air is supplied to the air injection port 7a via the air supply pipe 11, the connector 10 and the air supply passage 9, and this air is ejected in the form of bubbles into the purification chamber 29 inside the plate-shaped filter medium 20 through the air injection cylinder 8 from there. It The jetted air becomes an air flow and rises in the purification chamber 29, and accordingly, the water in the purification chamber 29 also rises and passes through the drainage port 21 and the drainage pipe 32 to the water tank 1.
Is discharged inside. As a result, the water absorption force acts on the purification chamber 29, and the polluted water in the water tank 1 is, as shown by the arrow in FIG.
A part thereof is sucked into the unpurified chamber 30 from the water absorption hole 33 on the upper surface of the drainage cover 31a, permeates the plate-shaped filter material 20 from there, and then flows into the purification chamber 29, and another part. Is sucked into the closed case 17 through the water absorption holes 6 formed in the filter case 2 of the closed case 17 through the gaps such as pebbles laid on the bottom of the water tank 1, and the granular filter material is stored therein. After passing through 18 to be cleaned, it passes through the through hole 16 of the lid 14 and the through hole 26 of the bottom plate 23, and the purifying chamber 29.
Flow into. Then, the water in the purification chamber 29 that has been purified by passing through both the filtering materials 18 and 20 passes through the drain port 21 opened in the ceiling plate 22 together with the air jetted into the purification chamber 29 from the air injection cylinder 8. It flows into the drain pipe 32, and from there, is returned to the water tank 1 as clean water.

According to the first embodiment having the above-mentioned structure,
Since the plate-shaped filter medium 20 has a greater water resistance than the granular filter medium 18, the flow rate of the polluted water passing through the filter medium becomes relatively small, and the chlorella that is less likely to occur in the plate-shaped filter medium 20 when the flow rate is high. And the like, which promotes the reproduction of aerobic microorganisms including beneficial bacteria, and the plate-shaped filter medium 20 is aerated by the aerobic microorganisms.
It is possible to decompose organic matter such as residual food and feces attached to the fish and prevent the clogging thereof, and also to provide bacteria such as chlorella as live food for the ornamental fish in the aquarium 1.

Further, the plate-shaped filter medium 20 is more likely to cause clogging than the granular filter medium 18, but the water in the water tank 1 has water absorption holes 6
Since it constantly flows into the purification chamber 29 through the granular filter material 18 having a relatively small water resistance in the closed case 17, a water absorption force is always generated in the purification chamber 29, and therefore, the inside of the unpurified chamber 30. Water passes through the plate-shaped filter material 20 and the purification chamber 2
9, the water flow from the unpurified chamber 30 to the purified chamber 29 is not interrupted, and the good filtration effect of the plate-shaped filter medium 20 can be maintained for a long period of time.

By the way, the use of the filtering device F
For example, the first filtration unit U₁Granular filter material 18 therein, and
Second filtration unit U₂Is gradually left on the plate-like filter material 20 of
Since dirt such as food and feces adheres and accumulates, it is necessary to filter these.
Materials 18 and 20 need to be cleaned or replaced regularly
However, in such a case, each unit U₁, U₂as well as
U ₃Can be disassembled. That is, holding the filtration device F
Of the engagement piece 3 of the closed case 17 and the drain cover 31a.
As shown in FIG. 3, it is possible to remove the first by simply disengaging the locking claw 34.
Filtration unit U₁, Second filtration unit U₂And cover
Unit U₃Can be easily disassembled into This place
In this case, the granular filter material 18 is enclosed in the closed case 17.
It may be spilled from the case 17 during disassembly work,
It does not scatter and the plate-shaped filter material 2
0 is held and fixed on the holding frame 19, so during disassembly work
It doesn't move or deform in a crowd. Shi
Therefore, the filter device F can be easily disassembled and assembled.
it can.

Then, if the first filtering unit U ₁ is gripped and shaken while sprinkling water on it, the dirt attached to and deposited on the granular filtering material 18 can be easily removed, and the plate-shaped filtering material 20 is removed from the holding frame 19. If it is removed and washed, the dirt attached to and deposited on the plate-shaped filter material 20 is removed.

The granular filter material 18 and the plate-like filter material 2 are also provided.
In the case of replacing 0 with other filter media 18 'and 20' having different filtration capacities, as shown in FIG.
It suffices to incorporate 8 and 20 into the first filtration unit U ₁ and the second filtration unit U ₂ respectively in advance, so that the filter media 18, 20; 18 'and 20' can be easily replaced. You can

Since the closed case 17 can be opened and closed by the lid 14, it is possible to take out the granular filter material 18 from the case 17 as needed.

Next, a second embodiment of the present invention will be described with reference to FIG.

The filtration apparatus F'of the second embodiment has a point in which the second filtration units U ₂ are stacked in a plurality of stages, and a cover unit U ₃ 'is provided in a multi-stage to cover the second filtration units U _2. The configuration is different from that of the first embodiment described above. That is, the cover unit U ₃ ′ of this embodiment
Is composed of a plurality of tubular covers 31b which are detachable from each other and one drainage cover 31a which has the same structure as that of the first embodiment and which is detachable from the tubular covers 31b. The tubular cover 31b has a height capable of accommodating the second filtration unit U ₂ , and a pair of engagement pieces 36, 3 are provided on both sides of the upper end of the outer side surface thereof.
6, a pair of engaging claws 37, 37 are integrally formed on both sides of the lower end. The engagement piece 36 and the engagement claw 37 are
Engagement piece 3 of the filter medium container 2 and drain cover 31
It is formed in the same manner as the engaging claw 34 of a. A cutout 38 for inserting the connector 10 is formed in at least the cover 31b connected to the closed case 17 among the plurality of cylindrical covers 31b. When assembling the filtering device F 'of the present embodiment is a second filtration unit U ₂ is placed a cylindrical cover 31b connected to the first filtering unit U ₁ from the first on the filtration unit U ₁ , followed by the second filtration unit U on the following ₂ second filtering unit U ₂ next cylindrical cover 3 on the tubular cover 31b from is placed
1b are connected, and this operation is sequentially repeated, and finally the drain cover 31a is connected to the uppermost cylindrical cover 31b.
Alternatively, after stacking the plurality of second filtration units U ₂ on the first filtration unit U ₁ , the drainage cover 31a and the plurality of cylindrical covers 31b that are connected in advance are placed on the second filtration unit U ₂ group and The lower cylindrical cover 31b is connected to the closed case 17.

According to the second embodiment of the present invention having the above-mentioned structure, the area of the plate-like filter medium 20 can be appropriately increased or decreased by appropriately removing the second filtration unit U ₂ . The purification capacity of the filter F'can be adjusted according to the volume of water to be purified.

Although the embodiments of the filtration device according to the present invention have been described in detail above, the present invention is not limited to the above embodiments, and does not depart from the invention described in the claims. It is possible to make various small design changes.

For example, in each of the above-described embodiments, the drainage cover 31a or the tubular cover 31b and the closed case 17 are continuously detached, the drainage cover 31a and the tubular cover 31b are continuously detached, or the tubular cover 31b. An example in which the engaging pieces 3 and 36 and the engaging claws 34 and 37 are used for continuous release of each other has been shown, but the invention is not limited to this, and for example, a step portion or the like that can be fitted to each member may be formed. This may be detachably connected.

[0025]

As described above, according to the present invention, there is provided a filtering device which is installed in a water tank and which sucks and filters the water in the water tank by receiving pressure air from an air pump. The first filtration unit includes at least one second filtration unit laminated on the first filtration unit, and a cover unit that covers the second filtration unit and is detachably attached to the first filtration unit. The unit encloses a granular filter material that also serves as a weight in a closed case, opens a water absorption hole in the bottom surface of the closed case, opens a flow hole in the upper surface of the closed case, and has an air injection port connected to the air pump. The second filtering unit is formed by winding a plate-like filtering material in a tubular shape around a holding frame, and communicates with the first filtering unit through the flow hole in the holding frame. A purification chamber communicating with the air injection port is defined, and an unpurified chamber is defined outside the same in cooperation with the cover unit, and a drain pipe communicating with the purification chamber is integrally formed with the cover unit. In addition, since the water absorption hole communicating with the unpurified chamber is opened, each unit can be disassembled, and the first and second filtration units can be easily cleaned and replaced. The granular filter material in the second filtration unit can be easily cleaned without scattering to the outside. Also, the replacement work with the first and second filtration units accommodating different kinds of filtration materials can be easily performed.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along line 1-1 of FIG. 2, showing a state where a filtering device according to a first embodiment of the present invention is installed in a water tank.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an exploded perspective view of the filtering device according to the first embodiment.

FIG. 4 is an exploded perspective view of a filter device according to a second embodiment of the present invention.

[Reference Numerals] 1 water tank 2 filtration material container F, F 'filtering device P pump U _1, U _1' first filtering unit U _2, U ₂ 'second filtration unit U _3, U _3' cover unit

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[Procedure amendment]

[Submission date] October 9, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title of the Invention Filtration device

[Claims]

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is installed in a water bath and the water in the water tank under pressure air from the air pump so that suction filtration, goldfish, tropical fish, etc., filtration equipment of rearing water for ornamental fish about the.

[0002]

2. Description of the Related Art Conventionally, an air injection port connected to an air pump has been used.
The bottom wall opened at the top and the holding frame are wrapped with a plate-shaped filter in a tubular shape.
One filtration unit mounted on the bottom wall.
Cover the filtration unit with the open lower end
It is a cover that is detachably attached by the bottom wall unit.
The filter unit, and at the top of the cover unit.
A drainage pipe and a water intake hole are provided to blow air into the filtration unit.
A purification chamber that communicates with the injection port and the water intake hole should be
Worked with the bar to define each unclean room
Those described in, for example, Japanese Patent Publication No. 61-15724.
It is conventionally known as described above.

[0003]

By the way, in such a conventionally known filtering device, a filtering casing including the cover and the bottom wall is formed.
Since only one filtration unit can be installed in the base,
Trying to obtain multiple types of filtration devices with different filtration capabilities
In some cases, there are multiple sizes that correspond to the filtration capacity.
Different filtration units and corresponding to these filtration units
It is necessary to specially prepare multiple types of dedicated filtration cases.
Yes, there is a problem that the cost increases, and
Trying to change the filtration capacity of in-use filtration equipment in the future
If you have a new filtration capability that you are going to change
Easy to change because it is necessary to prepare a separate filtration device
There were also problems such as not being.

The present invention has been made in view of the above circumstances and uses a single type of filtration unit and filtration case.
Another object of the present invention is to provide the above-mentioned filtration device whose filtration capacity can be easily changed as appropriate .

[0005]

In order to achieve the above object, according to the present invention, there is provided a filtering device which is installed in a water tank and which receives pressurized air from an air pump and suction-filters water in the water tank . , The air jet connected to the air pump
On the bottom wall unit that opens at the top and on this bottom wall unit
At least two filtration units that are stacked, and the filtration unit
Cover the knit and open the lower end to the bottom wall unit.
It consists of a cover unit that is more closed, and
The knit has a purification chamber that communicates with the air injection port inside.
However, in addition to that, in cooperation with the cover unit on the outside,
A plate-shaped filter material is attached to the holding frame so that each chemical chamber is defined.
Is wound in a cylindrical shape, and the cover unit is
One that has a drain pipe that communicates with the purification room at the top
Can be connected to the drain cover and the open lower end of this drain cover
Top and bottom with at least one cylindrical connecting cover
It is configured in rows, and the bottom of the drain cover is at the bottom.
Of the first engaged portion and the connection cover provided on the wall unit
A first engagement member that can be engaged and disengaged with any of the second engaged portions provided on the upper end
The stopper is provided at the lower end of each connection cover.
Whichever of the second engaged portion of the joint portion and the other connecting cover
The second engaging portions that can be engaged and disengaged are also provided, and
The drain cover has a water absorption hole that communicates with the unpurified chamber.
Uttered

[0006]

EXAMPLES Hereinafter, the embodiment of the filtration device of the present invention will be described with reference to the drawings, a filtration device F of this embodiment in FIG. 1
Is shown installed in the water tank 1, and this filtering device F includes one first filtering unit U ₁ as a bottom wall unit and a small number of units mounted on this first filtering unit U _1.
If at least one (two in the case shown in FIG. 1) second filtration unit U ₂ and this second filtration unit U ₂ are coated ,
Both are composed of a cover unit U ₃ whose open lower end is closed by the first filtration unit U ₁ .

As shown in FIG. 3, the first filtration unit U ₁ is provided with a saucer-shaped filter medium accommodating body 2 having a polygonal shape when viewed from a plane having an open upper surface. A pair of engagement pieces 3 as first engaged portions are integrally formed on both sides of the outer side surface of the filter medium container 2, and a large number of support ribs 4 and four locking projections are formed on the inner side surface. The part 5 is integrally formed. A large number of water absorption holes 6 are radially provided on the bottom surface of the filter medium container 2, and
A short-cylindrical air supply pipe 7 having an air injection port 7a is integrally projectingly provided at the center thereof. As shown in FIG. 1, inside the air supply pipe 7 having a stepped portion 7b, a hollow air injection cylinder 8 made of a breathable material such as foamable synthetic resin and having a closed upper end is provided at the lower end thereof. The step portion 7b is brought into contact with and fitted. The hollow inside of the air supply pipe 7 is connected to the inner end of an air supply passage 9 formed integrally with the bottom surface of the filter medium container 2, and the outer end of the air supply passage 9 is opened to the side surface of the filter medium container 2. It A connector 10 is removably fitted to the outer end of the air supply passage 9 that opens to the side surface of the filter medium container 2, and the connector 10 is connected to an air pump P via an air supply pipe 11. A plurality of support ribs 12 are integrally formed on the outer peripheral surface of the air supply pipe 7 at equal intervals in the circumferential direction (see FIG. 3).

The lid 14 of the filter body 2 is detachably attached to the upper opening of the filter medium store 2. That is, the recess 14a that can be engaged with the locking projection 5 of the filter medium container 2 is formed around the lid body 14, and the opening of the filter medium container 2 is formed by engaging these with each other. Is lid 1
Covered with 4. In this case, the back surface of the lid 14 is supported by the large number of support ribs 4 and 12. An air through hole 15 facing the air injection port 7a is formed in the center of the lid body 14, and a large number of through holes 16 are radially formed around the air through hole 15. The filter case 2 and the lid 14 constitute a closed case 17, and the closed case 17 is made of a small stone or the like that acts as a weight for preventing the filter F from rising. A coarse granular filter material 18 is enclosed.

The second filtration unit U ₂ placed on the closed case 17 is a dense plate-like member made of a holding frame 19 and a porous synthetic resin material wound around the holding frame 19 in a tubular shape. It is composed of a filter medium 20. As shown in FIG. 1 and FIG. 3, the holding frame 19 has a plurality of drain holes 21 formed in the center thereof and a star-shaped ceiling plate 22 when viewed from above and a polygonal bottom plate 23 when viewed from above. The bottom plate 23 has an opening portion 25 communicating with the air passage hole 15 of the lid body 14 at the center thereof, and a large number of through holes 26 around the opening portion 25. Are pierced radially. Ceiling plate 22
A plurality of locking projections 27 extending downward at equal intervals are integrally provided around the drainage port 21 on the lower surface of the bottom plate 2 and
Also on the upper surface of 3, a locking projection 28 is provided facing the locking projection 27.
Are projected integrally.

As shown in FIG. 2, the plate-like filter medium 20 has an inner peripheral surface on the connecting rod 24 and an outer peripheral surface on the ceiling plate 22.
And the locking projections 27 and 28 provided opposite to the bottom plate 23 are alternately locked and fixedly held by the holding frame 19, that is, the plate-like filtering material 20 is bent in a wave shape and is wound in a tubular shape. And is placed on the first filtration unit U _{1 in the} closed state. Further, a purification chamber 29 having a relatively large volume is formed inside thereof, which communicates with the inside of the closed case 17 through the circulation hole 16 and the communication hole 26 and also communicates with the air injection port 7a. cooperates with the inner side of the cover unit U ₃ defines an unpurified chamber 30.

The cover unit U ₃ can be fitted and connected to the drain cover 31a in the shape of a rectangular tube and the open lower end of the cover 31a.
At least one cylindrical connecting cover 31b
The number of stacked layers of the connection cover 31b arranged below
Is the required filtration capacity of the filtration device F (ie the second filtration unit).
It is changed according to Tsu lamination number of bets U _2).

At the center of the upper surface of the drainage cover 31a, a drainage pipe 32 connected to the purification chamber 29 is integrally projected.
Around the drain pipe 32, a large number of water absorption holes 33 communicating with the unpurified chamber 30 are radially formed. On both sides of the lower end of the side surface of the drainage cover 31a, the engaging pieces 3 and 3 of the filter medium container 2 and the engaging piece 3 of the connection cover 31b which will be described later.
A pair of locking claws 34, 34 as a first locking portion that can be engaged and disengaged with any of the locking holes 6, 6 and 36 are integrally formed, and the air supply passage is provided between the locking claws 34, 34 at the lower end of the side surface. A notch 35 is formed which can be a relief for the connector 10 connected to the connector 9.

The tubular cover 31b is a second filtration unit.
It has a height that can accommodate U ₂
Is the pair of engaging pieces 36, 36 as the second locked portion.
However, on both sides of the lower end, the filter medium container 2 is engaged.
Pieces 3, 3 and the engaging piece 3 of the other connection cover 31b
A pair as a second locking portion that can be engaged and disengaged with any of 6 and 36.
Locking claws 37, 37 are integrally formed. Engagement of these
The piece 36 and the locking claw 37 are engaged with the filter medium container 2
The piece 3 and the locking claw 34 of the drain cover 31a, respectively.
It has the same shape and size. The plurality of cylinders
At least the closed case 17 of the cover 31b.
The cover 31b to be connected has a clearance for the connector 10.
A notch 38, which can be, is formed.

When assembling the filtration device F having the above structure
Attaches the second filtration unit U ₂ onto the first filtration unit U _1.
After placing the tubular cover 31b on the first filtration unit U ₁
Connected to the second filtration unit U ₂ and then the next
2 After mounting the filtration unit U ₂ , the cylindrical cover 31
Connect the next cylindrical cover 31b to b and repeat this work in sequence.
After returning, finally cover the drainage cover on the topmost cylindrical cover 31b.
-31a are connected. Alternatively, the first filtration unit U ₁
After stacking a plurality of second filtration units U ₂ on top,
Connected drainage cover 31a and a plurality of cylindrical covers 3
1b is put on the second filtration unit U ₂ group and at the bottom
The cylindrical cover 31b is connected to the closed case 17.

Therefore, the number of stacked stages of the second filtration unit U ₂ is
Appropriate selection (for example, 2 steps in the case of FIG. 1,
3 stages), the area of the plate-like filter medium 20 is appropriately increased.
It can be reduced according to the volume of water to be purified.
It is possible to adjust the purification capacity of the filtering device F. Only
Depending on the number of stacked stages of the second filtration unit U _2.
Connection cover 31b and drainage cover 3 that should cover these
The overall shape and size of the 1a filtration case is simple.
Can be changed to have the desired filtration capacity
The filtering device can be configured without difficulty, and the filtering ability is different.
It is possible to easily obtain a plurality of types of filtration devices at low cost.
Also, the filtration capacity of the filtration device once assembled
Easy to make changes while making the most of the original components
It can be carried out.

[0016] Next, you description of the operation of this embodiment.
Now , as shown in FIG. 1, when the filtration device F configured as described above is installed on the bottom surface of the water tank 1 on which pebbles and the like are laid and the air pump P is operated, the air pump P causes the air supply pipe 11,
Air injection port 7a via connector 10 and air supply passage 9
Is supplied to the purifying chamber 29 inside the plate-like filter medium 20 through the air injection cylinder 8 in a bubble form. The jetted air becomes an air current and rises in the purification chamber 29, and accordingly, the water in the purification chamber 29 also rises and is discharged into the water tank 1 through the drainage port 21 and the drainage pipe 32. As a result, the water absorption force acts on the purification chamber 29 and the water tank 1
As shown by the arrow in FIG. 1, a part of the polluted water in the inside is sucked into the unpurified chamber 30 through the water absorption hole 33 on the upper surface of the drainage cover 31a and then permeated through the plate-shaped filter medium 20 to be cleaned. After being cleaned, the closed case 1 flows into the purification chamber 29, and the other part passes through a gap such as pebbles spread on the bottom of the water tank 1.
No. 7, the granular filter medium 18 is sucked into the closed case 17 through the water-absorbing holes 6 formed in the filter medium container 2 and accommodated therein.
After passing through and being cleaned, it flows into the purification chamber 29 through the through hole 16 of the lid 14 and the through hole 26 of the bottom plate 23.
Then, the water in the purification chamber 29 that has been purified by passing through both the filtering materials 18 and 20 passes through the drain port 21 opened in the ceiling plate 22 together with the air jetted into the purification chamber 29 from the air injection cylinder 8. It flows into the drain pipe 32, and from there, is returned to the water tank 1 as clean water.

According to the configuration of the above embodiment , the plate-like filter material 2
Since 0 has a higher water flow resistance than the granular filter medium 18, the flow velocity of the contaminated water passing through it is relatively small, and the plate-like filter medium 20 is useful such as chlorella that is less likely to occur when the flow velocity is high. By promoting the growth of aerobic microorganisms including bacteria, the aerobic microorganisms can decompose organic matter such as residual food and feces adhering to the plate-like filter material 20 to prevent clogging, and bacteria such as chlorella. The aquarium 1
It can be used as a live feed for the viewing fish inside.

Further, the plate-shaped filter medium 20 is more likely to cause clogging than the granular filter medium 18, but the water in the water tank 1 has water absorption holes 6
Since it constantly flows into the purification chamber 29 through the granular filter material 18 having a relatively small water resistance in the closed case 17, a water absorption force is always generated in the purification chamber 29, and therefore, the inside of the unpurified chamber 30. Water passes through the plate-shaped filter material 20 and the purification chamber 2
9, the water flow from the unpurified chamber 30 to the purified chamber 29 is not interrupted, and the good filtration effect of the plate-shaped filter medium 20 can be maintained for a long period of time.

By the way, the use of the filtering device F
For example, the first filtration unit U₁Granular filter material 18 therein, and
Second filtration unit U₂Is gradually left on the plate-like filter material 20 of
Since dirt such as food and feces adheres and accumulates, it is necessary to filter these.
Materials 18 and 20 need to be cleaned or replaced regularly
However, in such a case, each unit U₁, U₂as well as
U ₃Can be disassembled. That is, holding the filtration device F
And the engaging piece 3 of the closed case 17Bottom connection cover
31b locking claw 37Just disengage withFigure 4I'll show you
Sea urchin first filtration unit U₁, Second filtration unit U₂And
And cover unit U ₃Can be easily disassembled into
In this case, the granular filter material 18 is enclosed in the closed case 17.
It has been spilled from the case 17 during disassembly work.
It does not scatter
Since the excess material 20 is held and fixed to the holding frame 19, it is disassembled.
Do not move or deform during the work.
Yes. Therefore, the filter device F can be easily disassembled and assembled.
be able to.

Then, if the first filtering unit U ₁ is gripped and shaken while sprinkling water on it, the dirt attached to and deposited on the granular filtering material 18 can be easily removed, and the plate-shaped filtering material 20 is removed from the holding frame 19. If it is removed and washed, the dirt attached to and deposited on the plate-shaped filter material 20 is removed.

Since the closed case 17 can be opened and closed by the lid 14, it is possible to take out the granular filter material 18 from the case 17 as needed.

Although the embodiments of the filtration device according to the present invention have been described in detail above, the present invention is not limited to the above embodiments, and does not depart from the present invention described in the claims. It is possible to make various small design changes.

For example, in each of the above-described embodiments, the drainage cover 31a or the tubular cover 31b and the closed case 17 are continuously detached, the drainage cover 31a and the tubular cover 31b are continuously detached, or the tubular cover 31b. An example in which the engaging pieces 3 and 36 and the locking claws 34 and 37 are used for continuous release of each other has been shown, but the invention is not limited to this, and, for example, a step portion or the like that can be fitted to each member This may be detachably connected.

[0024]

As described above, according to the present invention, one discharge
Arrange the water cover and the required number of connection covers vertically.
The cover unit is formed by locking the
And the required number of filtration units on the bottom wall unit.
The filter unit with the cover unit.
Cover and open bottom end of the cover unit with bottom wall unit
Since the filtration device can be configured by closing,
Properly install different types of filtration units and drainage and connection covers.
A filtration device that has the desired filtration capacity by simply combining several
The device can be assembled without difficulty, and therefore the balance of the filtration capacity.
Different types of filtration devices can be easily obtained at low cost,
In addition, the filtration capacity of the once assembled filtration device will be increased in the future.
Even if you want to change it, you can use the original components as they are.
However, it can be done easily.

[Brief description of drawings]

FIG. 1 is a cross-sectional view taken along line 1-1 of FIG. 2, showing a state of installation of a filtration device embodying the present invention in a water tank.

FIG. 2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an exploded perspective view of a filtration unit .

[Fig. 4] The whole of the filtration device when the filtration unit has three layers.
Body exploded perspective view

[Description of Reference Signs ] 1 Water tank 3 Engagement piece 7a as first engaged portion 19 Air injection port 19 Holding frame 20 Filtration material 29 Purification chamber 30 Unpurified chamber 31a Drain cover 31b Connection cover 32 Drain pipe 33 Water absorption hole 34 Locking Claw as First Locking Part 36 Engaging Piece 37 as Second Engagement Part 37 Locking Claw as Second Locking Part F Filtration Device P Air Pump U ₁ First Filtration Unit as Bottom Wall Unit _2nd filtration unit as U 2 filtration unit U ₃ cover unit

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

[Procedure 3]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 4

[Correction method] Change

[Correction content]

[Figure 4]

Claims (1)

[Claims] 1. A filtering device which is installed in a water tank (1) and which receives suction air from an air pump (P) to suction-filter the water in the water tank (1), which is a first filtration unit. (U ₁ , U ₁ ′) and at least one second filtration unit (U ₁ , U ₁ ′) laminated on the first filtration unit (U ₁ , U ₁ ′)
A cover unit which covers the filtration unit (U ₂ , U ₂ ′) and the second filtration unit (U ₂ , U ₂ ′) and is detachably attached to the first filtration unit (U ₁ , U ₁ ′) (U ₃ , U ₃ ′), and the first filtration unit (U ₁ , U ₁ ′) has a closed case (17) in which a granular filter material (18, 18 ′) also serving as a weight is enclosed. Then, the water absorption hole (6) is opened on the bottom surface of the closed case (17), the circulation hole (16) is opened on the upper surface, and the air injection port (7a) connected to the air pump (P) is opened. The second filtration unit (U ₂ , U ₂ ′) is constructed by winding a plate-shaped filter material (20, 20 ′) around a holding frame (19) in a tubular shape, and the distribution flow inside thereof. the communicates with the first filtering unit (U _1, U ₁ ') in the through hole (16) air injection (7a) to communicate cleaning chamber (2
9) is defined, also the cover unit to the outside (U _3, U ₃ 'to be been made unpurified chamber (30) is image cooperates with), the cover unit (U _3, U _3' ) Is integrally formed with a drain pipe (32) that communicates with the purification chamber (29), and a water intake hole (3) that communicates with the unpurified chamber (30).
A filtration device having 3) opened.