JP2000050763A - Filter device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filter device designed to regulate its filtration capacity and size and excellent in the efficiency of filtration and versatility. SOLUTION: This filter device is such one as to be equipped with discharge pipe(s) 16 at the center of the bottom wall and furnished with one or more bottomed cylindrical intermediate filter units 10 with a filter medium 60 placed therein, a disk-shaped cover unit 20 with a discharge port 26 at the center, and a bottomed cylindrical bottom unit 30 with a bubble generating means 40 at the center of the bottom wall; and this filter device is so designed that, the filter unit(s) may be mutually superposed, and in the superposed state the discharge pipes are arranged vertically, the cover unit 20, with its discharge port 26 allowed to correspond with the discharge pipe(s) 16, is set up on the upper end opening of the filter unit on uppermost tier, and the bottom unit 30, with its bubble generating means 40 allowed to correspond with the discharge pipe(s) 16, is fitted onto the lower end of the filter unit on the lowermost tier.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtration device mainly used for purifying water in an aquarium for ornamental breeding of aquatic organisms such as goldfish and tropical fish.

[0002]

2. Description of the Related Art As a filtering device arranged for purifying water in an aquarium for aquarium fish, for example, as disclosed in Japanese Patent Publication No. 60-7932, a bubble generating means provided in a filtering case is disclosed. 2. Description of the Related Art There has been conventionally known an air-lift type in which air bubbles are generated from the air, and water is sucked into a filtration case and filtered by an air-lift effect.

[0003] In addition to purifying water, such a filtering device creates a fantastic scene in which a large number of fine air bubbles are discharged from the device and gently rise while being dispersed. Especially when the ornamental fish tank is used as an interior of a room or the like.

[0004]

However, the above-mentioned conventional air-lift type filtration device has a problem that it cannot filter efficiently according to the environment in the water tank because the filtration capacity is constant. ing. Furthermore, since the size is constant, it was not possible to adjust the size of the filtration device in consideration of, for example, the balance in the water tank. For this reason, not only may the appearance be impaired,
If the size balance is emphasized, it may not be able to be used depending on the type of aquarium, causing a problem of poor versatility.

[0005] The present invention solves the above-mentioned problems of the prior art, can adjust the filtration capacity, can improve the filtration efficiency, and can change the size according to the water tank. It is an object of the present invention to provide a filtration device capable of obtaining sufficient versatility while securing a beautiful appearance.

[0006]

In order to achieve the above object, a filtering device according to the present invention has a bottom wall and a peripheral side wall provided on the outer peripheral edge of the bottom wall in an upright manner. In addition to being provided with a tapered discharge pipe extending upward and gradually reducing the diameter, a flow hole is provided on the outer periphery of the bottom wall,
One or a plurality of intermediate filtration units accommodating a filter medium outside the discharge pipe inside the peripheral side wall, a lid unit provided with a discharge port in the center and a water absorption hole on the outer periphery, a bottom wall, A bottom unit having a peripheral wall provided in a rising shape at a bottom wall outer peripheral edge portion, and a bottom unit provided with a bubble generating means in which bubbles are generated by supply of air at a center of the bottom wall; and Arranged alone or in a stack, the lid unit is detachably attached to the upper end opening of the intermediate filtration unit with its outlet corresponding to the discharge pipe of the intermediate filtration unit, and the bottom unit is The bubble generating means is detachably attached to the lower end of the intermediate filtration unit corresponding to the discharge pipe of the intermediate filtration unit, and is generated from the bubble generation means. Bubbles, the rising of the discharge pipe of the intermediate filtration unit, by being discharged from the outlet of the lid unit, the water flow is generated in the above units,
By the water flow, the water sucked from the water suction hole of the lid unit is guided into the bottom unit through the filter medium and the flow hole in the intermediate filtration unit, and further, rises in the discharge pipe and rises in the discharge pipe. The gist is that which is configured to be discharged from the discharge port.

[0007] In the filtration device of the present invention, one or more intermediate filtration units having a discharge pipe in the center, a lid unit arranged at the upper end of the intermediate filtration unit, and a bottom unit arranged at the lower end of the intermediate filtration unit Because, for example, by increasing the number of stacked intermediate filtration units, the number of discharge pipes at the center of the filtration unit can be increased, and the length of the pipe group can be increased. At the same time, the amount of filter medium through which water passes can be increased, and the filtration capacity can be increased.

On the other hand, by reducing the number of stacked intermediate filtration units, the length of the discharge pipe group can be shortened.
The suction force can be appropriately suppressed.

Further, by increasing or decreasing the number of stacked intermediate filtration units, the size of the entire filtration device can be changed. Therefore, the size of the filtration device can be adjusted according to the size of the water tank. .

On the other hand, in the present invention, an openable and closable water inlet is provided on the peripheral side wall of the intermediate filtration unit, and when the water inlet is opened, the water sucked from the water inlet is filled with the water. It is preferable to adopt a structure that is configured to be guided through the filter medium and the circulation hole in the intermediate filtration unit and into the bottom unit and further ascend in the discharge pipe to be discharged from the discharge port. .

That is, in this case, the amount of water taken in can be increased by opening the suction port, and the amount of water taken can be reduced by closing the suction port. Also in this respect, the water can be appropriately purified in accordance with the environment in the water tank and the like.

[0012]

1 to 3 are exploded perspective views showing a filtering device according to an embodiment of the present invention. As shown in these figures, the filtering device in this embodiment has three types of units (10), (20), and (30) each made of a transparent hard synthetic resin molded product, that is, a bottom wall (15).
A plurality of bottomed cylindrical intermediate filtration units (10) in which a peripheral side wall (11) is provided at the outer peripheral edge of the bottom wall, a disc-shaped lid unit (20), and an outer peripheral edge of the bottom wall (35) And a bottom unit (30) having a bottomed cylindrical shape in which a peripheral side wall (31) is provided in a rising shape at the portion.

As shown in FIGS. 8 to 12, the lower portion of the peripheral side wall (11) of the intermediate filtration unit (10) has a reduced diameter and is provided with an inner fitting portion (12). The inner fitting portion (12) has an outer diameter smaller than an inner diameter of an upper end opening edge of the peripheral side wall (11), and has a step (14) at an upper end of the inner fitting portion (12). It is provided so that another filtration unit (10) can be laminated. That is, until the upper opening edge of the lower filtration unit (10) abuts on the step (14) of the upper intermediate filtration unit (10), the inner fitting portion ( By fitting 12) inside the peripheral side wall (11) of the lower filtration unit (10), both filtration units (10) are aligned with each other in the vertical direction, and rotation about the axis is prevented. It is configured to be able to be stacked in an allowed state. In addition, similarly, it is also possible to laminate three or more filtration units (10).

The inner fitting portion (1) in the filtration unit (10)
The flow path forming recesses (12a) are formed in four places around 2), and the recesses (12a) allow the inner fitting portion (12) to be formed.
The outer side surface and the lower end surface are communicated. In addition, the inner fitting part (1
Before and after 2), engaging projections (12b) and (12b) are integrally formed so as to protrude in the outer diameter direction.

Further, on the peripheral side wall of the filtration unit (10),
Four notch-shaped suction ports (11a) are formed corresponding to the channel forming recesses (12a), and the engagement protrusions (12
b) Two engagement grooves (13) are formed corresponding to (12b).

As shown in FIG. 13, the engagement groove (13)
An introduction groove (131) that is open at the upper end and extends downward along the axial direction, and one end side communicates with the lower end of the introduction groove (131), and one and the other circumferential grooves (1) extend along the circumferential direction. 132a) and (132b) and a narrow diameter portion (133) at the other end of the circumferential groove portions (132a) and (132b).
a) One side and the other side engaging portions (134a) (134b) communicating with each other via (133b).

As shown in FIGS. 1 and 5, when the intermediate filtration unit (10) is stacked, the engagement projections (12b) (12b) of the upper filtration unit (10) are connected to the lower filtration unit (10). ), The inner fitting portion (12) of the upper filtration unit (10) is inserted into the engagement groove (13).
It fits inside the peripheral side wall of the lower filtration unit (10). Further, in this fitted state, the upper filtration unit (10) is rotated in the circumferential direction relatively to the lower filtration unit (10), and as shown in FIG.
3) by moving b) along the circumferential groove (132a) on one side and forcibly passing through the narrow diameter portion (133a) and positioning it on the engaging portion (134a) on one side. As shown in FIG. 6, the lower filtration unit (10)
The four notch-shaped suction ports (11a) in the upper filtration unit (10) are provided with the four flow path forming recesses (12) in the upper filtration unit (10).
a), and the suction port (11a) is configured to communicate with the inside of the lower filtration unit (10) via the channel forming recess (12a).

In the filtering unit (10), the notch-shaped suction port (11a) and the channel forming recess (12a) are not formed in the same cross section, but in FIGS. In order to facilitate understanding, a notch-shaped suction port (11a) and a channel forming recess (12a) are formed in one section of the filtration unit (10).

On the other hand, as shown in FIG.
0) In a state where the two are fitted, the upper filtration unit (10) is rotated in the opposite direction to the lower filtration unit (10) with respect to the lower filtration unit (10) so that the engagement protrusion (12b) is rotated around the other side. Directional groove (132b), and forcibly pass through the narrow-diameter portion (133b) to engage the other side of the engaging portion (1).
In the state positioned at 34b), as shown in FIGS. 4 and 7, the four lower notched suction ports (11a) are displaced in the circumferential direction with respect to the upper four flow path forming recesses (12a). Then, each notch-shaped suction port (11a) is configured to be closed in a watertight state by the outer surface of the inner fitting portion (12).

It is to be noted that the engagement projection (12b) of the upper filtration unit (10) is forcibly engaged with the narrow diameter portion (133a) (133b) of the engagement groove (13) of the lower filtration unit (10). Pass through the engaging portions (134a) (134b)
, It is possible to prevent the engaging protrusion (12b) from unintentionally passing through the narrow diameter portions (133a) (133b) and being guided to the circumferential groove portions (132a) (132b). It is configured so that the rotation stop and the pull-out are prevented. Needless to say, the engaging projections (1
If one of the filtration units (10) is strongly rotated in a state in which the second protrusion (2b) is positioned at the engagement portions (134a) and (134b), the engagement protrusion (12b) becomes a narrow diameter portion (133a).
(133b) and the circumferential groove (132a) (13
2b), one filtration unit (10) can be removed from the other filtration unit (10) without difficulty.

In the center of the bottom wall (15) of the intermediate filtration unit (10), a discharge pipe (16) whose lower end is opened below the bottom wall (15) is integrally formed.
The discharge pipe (16) extends upward along the axis of the filtration unit (10), and has an upper end located above an upper end position of the peripheral side wall (11). Furthermore, this discharge pipe (1
6) is formed in a tapered shape so that the diameter gradually decreases as it goes upward, and the outer diameter of the upper part is set smaller than the inner diameter of the lower part. Thereby, as shown in FIG. 3 and FIG. 4, when the filtration units (10) are vertically stacked, the upper part of the discharge pipe (16) of the lower filtration unit (10) is connected to the upper filtration unit (10). The discharge pipes (16) are arranged so as to be accommodated in the lower part of the discharge pipes (10), and the respective discharge pipes (16) are arranged vertically along the axis.

The bottom wall (15) of the filtration unit (10)
On the outer side of the discharge pipe (16), a number of flow holes (15a) extending in the circumferential direction are formed.

As shown in FIGS. 14 to 18, the lid unit (20) is provided with an inner fitting peripheral side wall (22) in a rising shape along the outer peripheral edge, and the upper end of the peripheral side wall (22). A flange portion (21) is provided in an outwardly protruding shape. The inner fitting peripheral side wall (22) has an outer diameter dimension of:
The inner filtration peripheral wall (22) is formed to be smaller than the inner diameter of the upper end opening of the intermediate filtration unit (10) so that it can fit into the upper end opening of the intermediate filtration unit (10). I have.

The filter unit (10) is provided at four places around the inner peripheral side wall (22) of the lid unit (20).
A channel forming recess (22a) is formed corresponding to the notched suction port (11a), and the recess (22a)
The outer side surface and the lower end surface of the inner fitting peripheral side wall (22) communicate with each other. Engagement projections (22b) (22b) are integrally formed on the front and rear sides of the inner fitting peripheral side wall (22), corresponding to the engagement grooves (13) of the filtration unit (10).

An outlet (26) is formed at the center of the lid unit (20), and the outlet (26) is formed.
Are integrally formed so as to rise upward, and a cylindrical knob (27) is formed. A knurled portion (not shown) is provided on the outer peripheral surface of the knob (27) to prevent slippage.

Further, on the outside of the outlet (26) of the lid unit (20), there are provided a large number of circumferentially extending suction holes (2).
5a) is formed.

The lid unit (20) having the above-described structure is similar to that shown in FIG.
And as shown in FIG. 5, the engagement projections (22b) and (22b)
The inner peripheral side wall (22) of the lid unit (20) is fitted into the upper end opening of the filtration unit (10) so that is inserted into the engagement grooves (13) (13) of the filtration unit (10). Then, the flange (21) of the lid unit (20) is brought into contact with and locked to the upper end opening edge of the filtration unit (10), so that the lid unit (20) is brought into contact with the intermediate filtration unit (1).
It is configured to be fitted with the upper end opening of 0) closed. In this closed state, the upper end of the discharge pipe (16) in the filtration unit (10) is arranged so as to face the discharge port (26) of the lid unit (20).

In this closed state, the lid unit (20)
Is rotated in the circumferential direction relative to the filtration unit (10) to move the engagement protrusion (22b) along the circumferential groove (132a) on one side as shown in FIG. (133a) is forcibly passed through to engage the engagement portion (1
34a), as shown in FIGS. 3 and 6, the four notched suction ports (11a) in the filtration unit (10) are connected to the four channel forming recesses (22a) in the lid unit (20). The notch-shaped suction port (11a) is configured to communicate with the inside of the filtration unit (10) via the flow path forming recess (22a).

As shown in FIG. 7, the lid unit (2
0) is rotated with respect to the filtration unit (10) in the opposite direction to the above, so that the engagement protrusion (22b) is moved along the circumferential groove (132b) on the other side, and the narrow diameter portion (133) is further moved.
b) is forcibly passed to engage the other engaging portion (134b).
4 and 7, the notch-shaped suction port (11a) is provided with the channel forming recess (22) as shown in FIGS.
Each notch-shaped suction port (11a) is configured to be water-tightly closed by the outer side surface of the inner fitting peripheral side wall (22) so as to be displaced in the circumferential direction with respect to a).

In the lid unit (20) as well, the engaging projections (22b) are forced to pass through the narrow diameter portions (133a) and (133b) in the engaging grooves (13) of the filtration unit (10). Thereby, it is configured such that rotation prevention and removal prevention with respect to the filtration unit (10) are achieved.

As shown in FIG. 19 to FIG. 21, the bottom unit (30) has an outer fitting portion (32) in which an upper portion of a peripheral side wall (31) is formed to have an enlarged diameter. The outer fitting portion (32) is formed such that the inner diameter thereof is larger than the outer diameter size of the inner fitting portion (12) of the filtration unit (10), and a lower end inner circumference of the outer fitting portion (32) has a step. A part (34) is formed.

Further, at the front and rear positions of the peripheral side wall (31) of the bottom unit (30), the engagement grooves (33) corresponding to the engagement protrusions (12b) and (12b) of the filtration unit (10).
Are formed. As shown in FIG. 22, the engagement groove (33) has an introduction groove (331) having an open upper end and extending downward along the axial direction, and an introduction groove (331) at one end.
Circumferential groove (3) communicating with the lower end of the
32) and a narrow diameter portion (3) on the other end side of the circumferential groove portion (332).
33), and an engagement portion (334) communicating with the other through an engagement portion (334).

The bottom wall (3) of the bottom unit (30)
In the center of 5), there is provided a tubular portion (37) for attaching bubble generating means, and the lower portion of the bubble generating means (40) made of a porous body is fitted into this tubular portion (37). It is fixed to.

Further, in the lower part of the peripheral side wall (31) of the bottom unit (30), an air supply tube insertion recess (31) is provided.
a) is formed, and an air supply tube insertion recess (31a) is formed on the bottom wall (35) of the bottom unit (30).
An air supply passage (38) is formed which communicates the inside with the inside of the air bubble generating means mounting cylindrical portion (37).

The end of the air supply path (38) on the side of the recess (31a) is formed as a tube insertion pipe (38a) so that the end of the air supply tube can be inserted.

The bottom wall (35) of the bottom unit (30)
A plurality of ribs (39) are provided along the circumferential direction corresponding to the outer periphery of the bubble generating means (40).

The bottom unit (30) having the above structure is the same as that shown in FIG.
As shown in FIG. 4, the inner fitting portion of the filtration unit (10) is locked until the outer peripheral edge of the bottom wall of the intermediate filtration unit (10) is abutted on the step (34) of the bottom unit (30). By fitting (12) into the upper end opening of the bottom unit (30), the filtration unit (10) is made to coincide with the bottom unit (30) in the vertical direction, and the rotation of the filtration unit (10) around the axis is achieved. It is configured to be able to be stacked while allowing rotation. In this stacked state, the bubble generating means (40) of the bottom unit (30) is connected to the filtration unit (1).
0) is configured to be accommodated in a lower portion of the discharge pipe (16).

In this stacked state, the filtration unit (10) is rotated with respect to the bottom unit (30) so that the engaging projections (12b) of the filtration unit (30) are aligned with the circumferential grooves of the bottom unit (30). Move along (332)
In addition, the engaging portion (3) is forcibly passed through the narrow diameter portion (333).
34), both units (10)
(30) can be prevented from slipping out and rotating.

The filtering device of this embodiment is composed of the above-mentioned units (10), (20) and (30), and these are assembled and used, for example, for water purification of an aquarium fish tank.

That is, as shown in FIGS. 1 to 4, pebbles (50) and the like are spread on the outside of the bubble generating means (40) in the bottom unit (30), and the discharge pipe in each intermediate filtration unit (10). On the outside of (16), filter media (6
0) respectively, and as described above, an appropriate number of intermediate filtration units (1) are placed on the bottom unit (30).
0) and the uppermost filtration unit (1)
Attach the lid unit (20) to the upper opening of (0).

The filter device thus assembled is connected to the tube insertion pipe (38a) of the bottom unit (30).
Then, one end of the air supply tube is inserted and fixed, and the other end of the tube is connected to an air pump. In this state, the tube is placed on the bottom of the water tank.

When air is supplied to the bubble generating means (40) by the operation of the air pump, the bubble generating means (4) is supplied.
From 0), a number of fine air bubbles are generated, and the air bubbles rise sequentially through the discharge pipes (16) of the respective intermediate filtration units (10) and pass through the discharge pipes (16) of the uppermost filtration unit (10). And the outlet (2) of the lid unit (20)
It is discharged into the water tank from 6). Further, the water in the discharge pipe (16) rises together with the air bubbles and is discharged from the discharge port (26), whereby the inside of the discharge pipe (16) becomes negative pressure and the lowermost discharge pipe (16) is discharged. A suction force is generated at the lower end.

At this time, as shown in FIGS. 4 and 7, when the notch-shaped suction port (11a) provided in the peripheral side wall (11) of the intermediate filtration unit (10) is closed,
By the above-mentioned suction force, water is guided through the suction hole (25a) of the lid unit (20), into the uppermost filtration unit (10), and filtered through the filter medium (60). After passing through the flow hole (15a) of the wall (15), it is sequentially guided to the lower filtration unit (10). The water that has passed through the filter media (60) in each of the filtration units (10) in this manner is passed through the flow holes (15a) of the lowermost filtration unit (10).
After passing through the bottom unit (30), it is sucked from the lower end of the lowermost discharge pipe (16), rises each discharge pipe (16), and is discharged from the outlet port (20) of the lid unit (20). 26).

On the other hand, as shown in FIG. 3 and FIG. 6, when the notched suction port (11a) in the peripheral side wall (11) of the intermediate filtration unit (10) is open, the flow of water is parallel to the above. Then, the water in the water tank is filled with each filtration unit (1
0) through each of the filter units (1) through the notched suction port (11a).
0), passes through each filtration unit (10) downward, and is filtered by the filter medium (60).
It is guided into the bottom unit (30) and is discharged through a discharge pipe (16).

As described above, the filtering device of the present embodiment is
Since one or more intermediate filtration units (10) are configured to be stackable, the number of stacked intermediate filtration units (10) is increased, so that the discharge pipe (16) provided at the center of the filtration unit (10). Since the number of pipes can be increased and the length of the pipe group can be increased, the suction force can be increased, and the amount of the filter medium (60) through which water passes can be increased, thereby increasing the filtration capacity. be able to. Further, by reducing the number of layers of the filtration unit (10), the suction force can be appropriately suppressed. In this way, the filtration capacity and suction power can be adjusted freely,
For example, water can be appropriately purified according to the environment in the water tank, and the filtration efficiency can be improved.

Further, by increasing or decreasing the number of stacked intermediate filtration units (10), the size of the entire filtration device can be changed. Therefore, the size of the filtration device can be adjusted according to the size of the water tank. It is possible to maintain a good balance with the aquarium, to ensure good aesthetics, and to be used without any problem regardless of the size of the aquarium, so that it is excellent in versatility.

In the present embodiment, the openable and closable suction port (1) is provided on the peripheral side wall (11) of the intermediate filtration unit (10).
1a), the intake of water can be increased by opening the suction port (11a), and the intake of water can be reduced by closing the suction port (11a). Can be reduced, and in this regard, water can be appropriately purified according to the environment in the aquarium,
The filtration efficiency can be further improved. Further, the amount of water taken in can be adjusted by opening and closing the suction port (11a), so that the flow rate can also be adjusted.

Moreover, since the suction port (11a) can be opened and closed for each filtration unit (10), for example, only the suction ports (11a) of some of the filtration units (10) can be opened. In addition, the intake amount and flow rate of water can be finely adjusted, and the filtration efficiency can be further improved.

Needless to say, in the present invention, the number of filtration units used is not limited to two, but may be one or three or more.

[0050]

As described above, according to the filtering device of the present invention, the lid unit is provided at the upper end opening of the single or stacked intermediate filtering unit, and the bottom unit is provided at the lower end. Therefore, by changing the number of stacked intermediate filtration units, the filtration capacity can be adjusted, and the filtration efficiency can be improved. Further, by increasing or decreasing the number of stacked intermediate filtration units, the size of the filtration device itself can also be changed, so that the size of the filtration device can be set according to the size of a water tank or the like, and a good appearance. And it can be used without any problem regardless of the size of the water tank, so that excellent versatility can be obtained.

On the other hand, in the present invention, when an openable and closable suction port is provided on the peripheral side wall of the intermediate filtration unit, the intake amount of water can be adjusted by opening and closing the suction port. There is an advantage that water can be more appropriately purified in accordance with the internal environment and the like, and the filtration efficiency can be further improved.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a filtration device according to an embodiment of the present invention.

FIG. 2 is an exploded cross-sectional view of the filtration device of the embodiment.

FIG. 3 is a cross-sectional view showing the filtration device of the embodiment with a side suction port opened.

FIG. 4 is a cross-sectional view showing the filtration device of the embodiment with its side suction port closed.

FIG. 5 is a partially cutaway front view showing the filtration device of the embodiment.

FIG. 6 is a partially cutaway front view showing the filtration device of the embodiment with its side suction port opened.

FIG. 7 is a partially cutaway front view showing the filter device of the embodiment with its side suction port closed.

FIG. 8 is a plan view showing an intermediate filtration unit of the filtration device according to the embodiment.

FIG. 9 is a bottom view showing the intermediate filtration unit of the embodiment.

FIG. 10 is a front view showing the intermediate filtration unit of the embodiment.

FIG. 11 is a sectional view taken along line PP of FIG. 8;

FIG. 12 is a sectional view taken along line QQ of FIG. 8;

FIG. 13 is an enlarged front view showing the vicinity of an engagement groove in the intermediate filtration unit of the embodiment.

FIG. 14 is a plan view showing a lid unit of the filtration device in the embodiment.

FIG. 15 is a bottom view showing the lid unit of the embodiment.

FIG. 16 is a front view showing the lid unit of the embodiment.

FIG. 17 is a sectional view taken along line RR of FIG. 14;

FIG. 18 is a sectional view taken along line SS in FIG. 14;

FIG. 19 is a plan view showing a bottom unit of the filtration device in the embodiment.

FIG. 20 is a front view showing the bottom unit of the embodiment.

FIG. 21 is a sectional view taken along line TT of FIG. 19;

FIG. 22 is an enlarged front view showing the vicinity of an engagement groove in the bottom unit of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Intermediate filtration unit 11 ... Peripheral side wall 11a ... Notch-shaped suction port 15 ... Bottom wall 15a ... Flow hole 16 ... Discharge pipe 20 ... Lid unit 25a ... Suction hole 26 ... Discharge port 30 ... Bottom unit 31 ... Peripheral side wall 35 ... Bottom Wall 40: bubble generating means 60: filter medium

Claims (2)

[Claims] 1. A tapered discharge pipe having a bottom wall and a peripheral side wall provided on the outer peripheral edge of the bottom wall in an upright manner, and extending upward and gradually decreasing in diameter is provided at the center of the bottom wall. At the same time, a flow hole is provided on the outer periphery of the bottom wall, one or a plurality of intermediate filtration units in which a filter medium is accommodated outside the discharge pipe inside the peripheral wall, and a discharge port is provided at the center, and a water absorption hole is provided on the outer periphery. A lid unit provided, a bottom wall, and a peripheral side wall provided in a rising shape at an outer peripheral edge of the bottom wall, and a bubble generating means for generating bubbles by supplying air is provided at the center of the bottom wall. A bottom unit, wherein the intermediate filtration unit is arranged alone or in a stack, and the lid unit has a discharge port corresponding to a discharge pipe of the intermediate filtration unit, and an upper end opening of the intermediate filtration unit. The bottom unit is detachably attached, and the bottom unit is detachably attached to a lower end of the intermediate filtration unit with its bubble generation means corresponding to a discharge pipe of the intermediate filtration unit, and bubbles generated from the bubble generation means However, ascending the discharge pipe of the intermediate filtration unit and discharging from the discharge port of the lid unit, a water flow is generated in each of the units, and the water flow is sucked from the water absorption hole of the lid unit. Water is passed through a filter medium and a flow hole in the intermediate filtration unit, is guided into the bottom unit, and further rises in the discharge pipe and is discharged from the discharge port. Characteristic filtration device. 2. An openable and closable water suction port is provided on a peripheral side wall of the intermediate filtration unit, and when the water suction port is opened, water sucked from the water suction port is supplied to the inside of the intermediate filtration unit. 2. The apparatus according to claim 1, further comprising a filter medium and a flow hole, which are guided into the bottom unit and further rise in the discharge pipe to be discharged from the discharge port.
The filtration device according to claim 1.