JP2003000096A - Filtration device for aquarium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filtration device for an aquarium, not only capable of efficiently removing deposited dirt and floating dirt in the aquarium by filtration, and capable of improving the cleaning efficiency, but also hardly causing outflow of sludge deposited in the inside when pulling up the filtrating case for the cleaning and the exchange of the filter. SOLUTION: A partitioning member 3 having a discharging pipe 32 formed in a horizontal partitioning plate 3a housed in a filtrating case 8 comprising a bottom tray 2 having a bottom wall part 2a with no water-flowing hole, and an upper part cover 1. An under flow chamber 9 is installed in the lower side of the horizontal partitioning plate 3a, and communicated with the discharging pipe 32. A double layered filter layer 4 is installed in the upper side of the horizontal partitioning plate 3a. An upper flow chamber 10 is constituted between the upper filter layer 4a and the upper wall part 1a of the upper cover 1. The upper flow chamber 10 is partitioned by the portioning walls 13a and 13b of the upper cover 1 into plural branching chambers, and the branching chambers are constituted of branching chambers 10A for lower water, communicated with a water-sucking guidepath 19, and branching chambers 10B for upper water, communicated with an upper water-sucking hole 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is arranged at the water bottom of an aquarium for ornamental breeding of aquatic organisms such as goldfish and tropical fish.
The present invention relates to a water tank filtration device that suction-filters water by utilizing an air lift effect when air supplied from an air pump is discharged as bubbles.

[0002]

2. Description of the Related Art Generally, in this type of aquarium filter apparatus, an upright discharge pipe is provided in a filter case filled with a filter medium, and air supplied from an air pump is discharged as bubbles into the pipe, and the bubbles are discharged. Due to the air lift effect when discharged upward through the pipe, a rising water flow is generated in the discharge pipe, and the negative pressure in the filtration case accompanying the generation of this rising water flow sucks the dirty water in the water tank. After being purified through a filter medium, it is discharged again from the discharge pipe into the water tank.

By the way, the dirt in the aquarium includes the accumulated dust such as feces and residual food deposited on the bottom of the aquarium and the floating dust floating in the water without settling. In order to efficiently filter and remove the dust, it is preferable to provide a suction hole corresponding to each dust.

In a conventional aquarium filtration device, a filter material is provided with a packed layer of granular material such as gravel in the lower part of the filter case, and a porous mat such as nonwoven fabric is arranged in the upper part of the filter case. Water containing sedimented dust is sucked through the holes to permeate the granular material packed layer, while water containing suspended dust is sucked into the porous mat to permeate through the upper suction hole provided at the top of the case to purify each. A structure in which water is combined with a discharge pipe and discharged to the outside is widely used (for example, Japanese Patent Publication No. 60-7932, Japanese Patent Publication No. 6-75457, and Japanese Patent Laid-Open No. 10-756).
No. 85).

[0005]

However, in the above conventional aquarium filter device, in order to filter the intake water from the bottom side and the top side of the filter case with different single filter media, respectively. The resistance at the time of water is different and the water absorption force on the bottom side and the water absorption force on the top side tend to be biased, and either one of the settled dust or the floating dust cannot be filtered and removed satisfactorily, which is sufficient for efficient filtration. It wasn't good enough.
Moreover, since the suction water from the bottom side and the top side of the filtration case is filtered by a single filter medium, the purification efficiency is low.

In addition, in this type of filtering device, when the filter material is clogged during use, the filter case is pulled out from the water for cleaning or replacement of the filter material. There was also a problem that when the case was pulled up, the dirt accumulated between the particles in the granular material packed bed flowed out together with the internal water from the suction hole at the bottom of the case, and the sludge contaminates the water in the water tank. .

The present invention has been made based on the above-mentioned technical background, and is capable of efficiently filtering and removing deposited dust and floating dust, improving the purification efficiency, and cleaning and exchanging filter media. An object of the present invention is to provide a water tank filtration device that does not cause sludge accumulated inside to flow out when a filtration case is pulled out from water.

[0008]

In order to achieve the above object, a water tank filtering device according to the present invention is a bottom tray having a bottom wall portion and a peripheral wall portion without water passage holes, and a top wall portion and a peripheral wall portion. A partition member integrally formed with an upright discharge pipe in the center of a horizontal partition plate provided with a large number of water passage holes is housed in a filtration case consisting of an upper cover fitted over the bottom tray having The upper end surface of the discharge pipe is arranged in close contact with the peripheral portion of the opening provided at the center of the upper wall of the upper cover, and a bubble generating means for discharging bubbles in the discharge pipe is provided, In the lower part of the horizontal partition plate, a downstream chamber is provided, the downstream chamber is communicated with the discharge pipe, and on the upper side of the horizontal partition plate, two filter medium layers of different filter media are provided, and the upper filter medium is provided. Between the layers and the top wall of the top cover A chamber is configured, and the upstream chamber is divided into a plurality of flow dividing chambers by a partition wall provided so as to project downward on the inner surface of the upper cover upper wall portion, and the plurality of flow dividing chambers are formed in the peripheral wall portion of the upper cover. A diversion chamber for lower water, which communicates with a water absorption guideway that opens along the vertical direction and whose lower end opens near the bottom wall of the bottom tray, and a diversion chamber for upper water, which communicates with an upper water absorption hole provided in the upper cover. It is characterized by being constituted by and.

According to the present invention, the upstream chamber is divided into a plurality of flow dividing chambers by the partition walls, and the plurality of flow dividing chambers are connected to a water absorption guide passage for sucking up the accumulated dust together with water. And an upper water diversion chamber that communicates with the upper water suction hole for sucking floating dust together with water. Since the water containing each dust is guided to each diversion chamber, each dust has a sufficient suction force. Can inhale water containing. The water sucked into each of the flow dividing chambers is passed through the same filter medium layer and filtered, so that there is no difference in water resistance during filtration. Therefore, it is possible to efficiently filter each dust. Further, by dividing the upstream chamber into a plurality of flow dividing chambers, the flow of the treated water in the filtration case is not biased, and the two-layer filter medium layer performs filtration in all regions corresponding to each flow dividing chamber. Therefore, the maximum filtration capacity can be exerted in the entire filter material layer without waste. Also,
Since the filtration is performed through the upper and lower two layers of filter media, the purification efficiency is improved. In addition, since there is no water passage hole in the bottom wall of the bottom tray, when pulling the filter case out of water for cleaning or replacement of the filter media, unless the case is extremely tilted or turned upside down, The sludge never flows out.

In the present invention, it is preferable that the lower water flow dividing chamber and the upper water flow dividing chamber are alternately arranged in the circumferential direction around the discharge pipe.
With such a configuration, the water around the filtration case can be sucked evenly, and the dust in the water can be filtered and removed more efficiently.

Further, in the opening of the upper cover upper wall portion,
It is preferable that a cross-shaped flow dividing frame is formed. With such a configuration, the purified water is diffused in all directions in the water tank, whereby a circulating water flow is formed and the water in the water tank can be thoroughly filtered. Moreover, since the bubbles generated from the bubble generating means by the flow dividing frame hit the frame and are further miniaturized, the aesthetic appearance in the use mode is also improved.

In the aquarium filtration device in which the flow dividing frame is formed, the upper cover is an integrally molded product made of synthetic resin having a substantially square shape in a plan view, and the flow dividing frame is formed by each cross-shaped crosspiece. Is arranged so as to be perpendicular to each side of the upper cover upper wall portion in a plan view, the gate provided in the central portion of the cross-shaped flow dividing frame body in forming the flow dividing frame body. Molding the upper cover by injecting molding resin from each of them and using each bar as a runner, the removal work of the runner can be omitted, and the molding of the upper cover is easy. Can be done. Further, since the cross-shaped crosspieces are arranged so as to be perpendicular to the respective sides of the upper cover upper wall portion in a plan view, the synthetic resin flowing in from the runner can easily reach every corner of the mold. It can be spread over and the upper cover can be molded with high yield.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION An aquarium filtration device according to the present invention will be described below based on an embodiment shown in the drawings.

1 to 5, (1) is an upper cover, (2) is a bottom tray, (3) is a partition member, (4) is upper and lower filter material layers, (5) is air stone, and (6) is Drain board, (7) is an elbow member for connecting the air supply tube.

As shown in FIGS. 1 and 2, the upper cover (1) is an integrally molded product of transparent hard synthetic resin, and is composed of an upper wall portion (1a) and a peripheral wall portion (1b) which hangs down from its periphery. And, it has a box shape that opens downward in a substantially square shape in a plan view.
An extension pipe (11) having a diameter that gradually decreases as it goes upward is integrally formed at the center of the upper wall (1a), and a cross-shaped cross-section is formed at the upper end of the inner peripheral surface of the pipe hole (11a) of the extension pipe (11). While the diversion frame (12) having a shape is formed,
The lower end of the pipe hole (11a) can be in close contact with the upper end surface of a discharge pipe (32) which will be described later. The flow dividing frame (12) was used as a runner in the molding process of the upper cover (1), and each cross-shaped crosspiece of the cross-shaped frame of the upper cover (1) upper wall portion (1a) in plan view. It is arranged so as to be perpendicular to each side. In the present embodiment, the pipe hole (11a) forms the opening (1c) of the upper cover (1).

Further, as shown in FIGS. 1 to 3, on the back surface side of the upper wall portion (1a), four of the upper wall portion (1a) are centered around the lower end of the pipe hole (11a) of the extension pipe (11). Radial partition walls (13a) extending to the corners are provided so as to project downward, and two adjacent strips of these radial partition walls (13a) have pipe holes (1) of the extension pipe (11) at their center-side tips.
1a) The arcuate partition walls (13b) along the periphery are connected to each other to form two independent chambers facing each other.

Further, the peripheral wall portion (1b) is formed by
A pair of right and left ridge-shaped outward bulging portions (14) extending in the up-down direction are provided on both opposing side surfaces, and a semicircular cutout portion (15) is provided at the center position of the lower end edges of these two side surfaces. In addition, the peripheral wall portion (1b) is arranged such that the upper wall portion (1
a) has a plurality of (10 in the figure) slit-shaped upper water absorption holes (16) reaching the peripheral portion of a), and at each of the widthwise central positions of these side surfaces, a pair of upwardly extending from the lower edge. Has a locking piece (18) formed between the thin cutouts (17) and (17), and the locking projection (18a) bulging in a substantially semicircular shape on the outer surface side of the locking piece (18). ) Is provided.

The bottom tray (2) is a molded product of a transparent hard synthetic resin, and has a bottom wall portion (2a) having no water passage hole and a peripheral wall portion (2b) rising from the peripheral edge thereof, and has a substantially square shape in a plan view. It has a box shape that opens upward, and the peripheral edge of the bottom wall portion (2a) slightly projects outward from the lower end of the peripheral wall portion (2b) to form a cover receiving portion (21). Then, on the inner surface side of the bottom wall portion (2a), an air discharge pipe (22) which is upright at the central position,
A horizontal tubular ventilation passage (23) extending from the lower end of the air discharge pipe (22) to the peripheral wall portion (2b), and the ventilation passage (23).
7 strips (24) radially arranged with the air discharge pipe (22) as the center except for the position (1) are integrally formed. In addition, among the four side surfaces of the peripheral wall portion (2b), the locking pieces (1) of the upper cover (1) are attached to the central portions of the two opposing side surfaces.
8) Guide grooves (2 along the vertical direction corresponding to (18)
5) is formed, and a locking frame (26) having a slit hole (26a) vertically penetrating the upper edge of the guide groove (25).
Are formed.

The partition member (3) is a molded product of transparent hard synthetic resin, and is composed of a horizontal partition plate (3a) having a large number of long hole-shaped water passage holes (31) and a peripheral wall portion (3) rising from the periphery thereof.
and b) form a sieve box shape that is substantially square in a plan view. The partition member (3a) is an upright discharge pipe (32) whose diameter gradually decreases toward the center of the horizontal partition plate (3a).
And the bottom surface side of the horizontal partition plate (3a) is recessed in a semicircular cross section along the radial direction from the root of the discharge pipe (32) to the peripheral wall portion (3b). It has (33). Then, of the four side surfaces on the four sides of the peripheral wall portion (3b), the central portions of the two opposite side surfaces are concave portions (3) corresponding to the guide grooves (25) of the bottom tray (2).
4), and has a pair of left and right pressing pieces (35) projecting inward at the upper edges of the other opposing side surfaces, and a receiving piece (36) at the center of each inner surface side of the four peripheries of the peripheral wall portion. It is projected. In addition, in this embodiment, the ventilation path external fitting portions (33) are provided on both sides of the discharge pipe (32) so that the partition member (3) is rotated halfway around the axis of the discharge pipe (32). Even in the case, it can be fitted in the bottom tray (2), which is convenient.

The upper and lower filter medium layers (4) are the upper filter medium layers (4a).
And a lower filter medium layer (4b). Upper filter medium layer (4a)
Consists of a hollow porous block such as a non-woven fabric having a pipe insertion hole (41) formed in the center, and granular activated carbon is stored in the internal space of the block, while the filtration surface area is widened and the outer periphery is improved to improve filtration efficiency. The surface is formed in a zigzag shape. The lower filter medium layer (4b) is composed of a granular material packed layer such as gravel.

The air stone (5) is an open-celled porous hollow shaft made of a hard synthetic resin foam or the like, and its upper end is closed. Further, the drainboard (6) is a semi-hard synthetic resin molded product having a substantially square flat plate shape, and has a circular hole (61) for inserting a discharge pipe in the center and a large number of elongated water holes (6).
2) and a recess (63) which is provided on the peripheral portion on one side and into which the pressing piece (35) of the partition member is fitted.

In the assembly of this aquarium filter device, the lower part of the air stone (5) is fitted onto the air discharge pipe (22) of the bottom tray (2) and the one end side of the elbow member (7) is connected to the air passage ( 23) Insert into the opening. On the other hand, on the horizontal partition plate (3a) of the partition member (3), a granular material such as gravel that constitutes the lower filter medium layer (4b) is placed, and the peripheral edge of the drainboard plate (6) presses the strip (35). The partition member (3) is arranged so as to be sandwiched between it and the receiving piece (36), and the partition member (3) is fitted inside the bottom tray (2) so that the ventilation passage outer fitting portion (33) covers the ventilation passage (23). Let At this time, the upper end surface of the peripheral wall portion (2b) of the bottom tray (2) is made substantially flush with the upper surface of the saw plate (6). Then, the porous block of the upper filter medium layer (4a) is further placed thereon, and the upper cover (1) is externally fitted to the bottom tray (2) to form the filter case (8). At this time, the upper cover (1)
The locking pieces (18) (18) on both sides of the lock tray (18) are inserted into the slit holes (26a) (26a) of the bottom tray (2), and the locking projections (18a) (18a) of the locking pieces (18) are locked. (26) Engage with the lower edge and align the semi-circular cutout (15) with the insertion part of the elbow member (7). In addition, each component is dimensioned so that such an assembly can be performed.

As shown in FIGS. 4 and 5, in the thus-assembled aquarium filtration device, the upper end surface of the discharge pipe (32) of the partition member (3) housed in the filtration case (8) is an upper part. A discharge pipe (32) communicates with the extension pipe (11), which is disposed in close contact with the periphery of the opening (1c) of the cover (1), that is, the periphery of the pipe hole (11a) of the extension pipe (11). Has been made. In addition, this filtering device is equipped with a horizontal partition plate (3a) to filter case (8).
The inside is partitioned, and the downstream chamber (9) is provided below the partition plate (3a).
Is provided, and the downstream chamber (9) is connected to the discharge pipe (32). On the upper side of the partition plate (3a), an upper filter medium layer (4a) and a lower filter medium layer (4b) are formed. The filter medium layer (4) is arranged so as to surround the circumference of the discharge pipe (32). Further, an upstream chamber (10) is formed between the upper filter medium layer (4a) and the upper wall portion (1a) of the upper cover (1), and the upstream chamber (10) is the upper wall of the upper cover (1). The radial partition wall (13a) and the arc-shaped partition wall (13b) provided so as to project downward on the inner surface of the portion (1a) and two independent flow dividing chambers (10a) (10a) facing each other and two facing each other. , And the diversion chamber (1
0b) and (10b). That is, these partition walls (13a) (13b) ... Prevent the floating by pressing the porous block of the upper filter medium layer (4a), and the space of the upstream chamber (10) is provided in the upper part of the filtration case (8). It also functions as a spacer to secure the space and also divides the upstream chamber (10) into a plurality of flow dividing chambers (10a) (10b). On the other hand, the bottom wall portion (2) of the bottom tray (2)
The strip (24) provided on the upper surface side of (a) is a partition member (3).
However, at the same time, it also functions as a spacer that secures the space of the downstream chamber (9) in the lower part of the filtration case (8), and the downstream chamber (9) corresponds to the upstream chamber (10) side, Moreover, it is divided into smaller parts.

Also, the top cover (1) and the bottom tray (2)
Between the peripheral wall portions (1b) and (2b) of each other, a duct-shaped water absorption guide path (in a vertical direction) is formed inside the outwardly bulging portions (14) on both side surfaces facing the upper cover (1). 19)
It constitutes ... The water absorption guide passages (19) are arranged such that their lower ends are open to the outside in the vicinity of the bottom wall portion (2a) of the bottom tray (2), that is, near the bottom of the water tank, and their upper ends are independent of the flow dividing chambers ( 10a) (10a). That is, these independent flow dividing chambers (10a)
... form a diversion chamber (10A) for lower water. Further, the upper water absorption holes (16) provided on the other opposite side surfaces of the upper cover (1) communicate with the flow dividing chambers (10b) (10b) communicating with each other. That is,
The flow dividing chambers (10b) that are in communication with each other form the upper water dividing chambers (10B). That is, the lower water diversion chambers (10A) (10A) and the upper water diversion chambers (10B) (1
0B), as shown in FIG. 3, each of the flow dividing chambers (10A) (1A)
0B) ... includes any of the four peripheral wall portions (1a) of the upper cover (1), the discharge pipe (3
They are arranged alternately in the circumferential direction centered on 2).

In the aquarium filtration device having such a structure, an air supply tube (not shown) of an air pump is connected to the elbow member (7) and is arranged at the bottom of the aquarium for aquatic organisms. When the air pump is activated, the ventilation path (23)
The air supplied to the inside of the air stone (5) through the air is discharged to the outside as fine bubbles from the surface of the air stone (5), and as the bubbles rise, the discharge pipe (32) and the extension pipe (11). ), An ascending water flow is generated, so that the inside of the filtration case (8) has a negative pressure. As a result, the water around the filtration case (8) is absorbed into the water absorption guideway (19).
... Or the upper water-absorbing holes (16) ... Inhaled into each of the flow-dividing chambers (10A) (10B) formed by partitioning the upstream chamber (10), and all the sucked water is in the upper filter medium layer (4).
a) and the lower filter medium layer (4b) in that order, it is purified, enters the discharge pipe (32) from the downstream chamber (9), and is discharged upward from the extension pipe (11). At this time, the flow dividing frame (1
In 2), the discharge flow is diverted and diffused in all directions in the water tank, thereby forming a circulating water flow that allows the water in the water tank to be thoroughly filtered and the rising bubbles to be further miniaturized. Exert the function of improving. In this embodiment, the air vent hole (20) is formed below the extension pipe (11) of the upper cover (1), and the air vent hole (20) is formed when the filtering device is submerged in the water tank. Since the air inside the case (8) is smoothly discharged from it, and unnecessary buoyancy is efficiently removed, the filtering device can be arranged at the bottom of the water tank without difficulty.

Here, since the suction inlet at the lower end of the water absorption guideway (19) is located near the bottom of the water tank, water containing a lot of dust such as feces and leftover food accumulated on the bottom of the water is sucked in while the upper water absorption path (19) is absorbed. The hole (16) sucks in water containing a large amount of floating debris floating in the water without settling. At this time, the upstream chamber (10) is divided into the lower water diversion chamber (10) by the partition walls (13a) (13b).
A) ... and the upper water diversion chamber (10B) ... are partitioned, so that each dust can be sucked together with water with a sufficient suction force. Moreover, each diversion chamber (10A) (10
Since the water sucked in B) is filtered by the same filter material layer (4), there is no difference in the water resistance during filtration, and it is possible to efficiently filter the dust corresponding to each dust. Further, by dividing the upstream chamber (10) into a plurality of flow dividing chambers (10A) (10B) ..., the flow of the treated water in the filtration case (8) is not biased, and the two-layered filter medium layer (4) is Flow distribution chamber (10
Since filtration will be performed in all areas corresponding to A) and (10B), the maximum filtration capacity can be exerted in the entire filter medium layer (4) without waste. Furthermore, since the water containing dust permeates through the upper and lower two filter medium layers (4) for purification, the purification efficiency is also improved.

On the other hand, when the filter medium layer (4) is clogged or the amount of dirt in the filter medium becomes full due to long-term use, the filter case (8) is pulled out from the water to perform cleaning or filter medium exchange. The bottom wall of the bottom tray (2) (2
Since there is no water passage hole in a), sludge accumulated inside will not flow out unless the case (8) is extremely tilted or turned upside down at the time of pulling up. There is no problem that the sludge that flows out when it is pulled up diffuses and contaminates the water.

In the above embodiment, since the cross-shaped flow dividing frame (12) is formed in the opening (1c) of the upper wall (1a) of the upper cover (1), purified water is formed. Are dispersed in all directions in the water tank, whereby a circulating water flow can be formed and the water in the water tank can be thoroughly filtered. Moreover, since the bubbles generated from the air stone (5) which is the bubble generating means are further miniaturized by the flow dividing frame (12), the aesthetic appearance in the use mode is also improved.

When forming the flow dividing frame body (12), molding resin is injected from a gate provided at the center of the cross-shaped flow dividing frame body (12), and each crosspiece is used as a runner to cover the upper cover (1). The molding of the upper cover (1) can be easily performed in combination with the fact that the work of removing the runner can be omitted. Also, each cross-shaped crosspiece has the upper cover (1) in plan view.
Since it is arranged so as to be perpendicular to each side of the upper wall portion (1a), the synthetic resin flowing from the runner can easily spread to every corner of the mold, and the upper cover ( 1) can be molded with good yield.

Although the aquarium filtration device according to one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the invention. It is possible.

In the above embodiment, the lower water flow dividing chamber (10
A and the upper water flow dividing chambers (10B) are alternately arranged in the circumferential direction around the discharge pipe (32), but the number of the flow dividing chambers and the arrangement mode are used. Is not limited to this, and various settings other than the embodiment can be set.

The upper filter medium layer (4a) and the lower filter medium layer (4b) are not particularly limited as long as they are different, but the filterability and removal of dirt, water permeability, and the reproductive ability and elimination of bacteria that decompose and consume dirt. From the viewpoint of sufficiently ensuring odor and the like, a hollow porous block made of a nonwoven fabric containing granular activated carbon inside is used in the upper filter medium layer (4a) as in the above embodiment,
The lower filter medium layer (4b) is preferably a granular material packed layer such as gravel having a low water resistance.

Further, in the above embodiment, the upper filter medium layer (4
What is used is one in which a) is placed on the drainboard (6) so that it is located above the bottom tray (2). For example, the lower part or the whole of the upper filter medium layer is stored in the bottom tray. It may be mounted on the drainboard in the different manner. However, from the viewpoint of effectively utilizing the outer peripheral surface of the porous block forming the upper filter medium layer, as in the embodiment, the porous block forming the upper filter medium layer (4a) is located above the bottom tray (2). What is mounted on the drainboard (6) is preferable.

In the above embodiment, the upper filter medium layer (4
Although a drainboard (6) is interposed between a) and the lower filter medium layer (4b), such a drainboard (6) can be omitted.

In addition, the outer shapes of the top cover (1) and the bottom tray (2) and their engaging structures, the flow path cross-sectional shape of the water absorption guideway (19), and the passage in the partition plate (3a) of the partition member (3). It goes without saying that various design changes can be made to the detailed configuration such as the shape and arrangement of the water holes (31).

[0036]

As described above, according to the aquarium filter device of the present invention, the upstream chamber is divided into the plurality of flow dividing chambers by the partition walls, and the plurality of flow dividing chambers suck up the accumulated dust together with the water. The lower water diversion chamber that communicates with the water suction guideway and the upper water diversion chamber that communicates with the upper water suction hole for sucking floating dust together with the water. Since it is guided to the chamber, it is possible to suck in the water containing each dust with a sufficient suction force. The water sucked into each of the flow dividing chambers is passed through the same filter medium layer and filtered, so that there is no difference in water resistance during filtration. Therefore, it is possible to efficiently filter each dust. Further, by dividing the upstream chamber into a plurality of flow dividing chambers, the flow of treated water in the filtration case is not biased,
The filter material layer having a two-layer structure performs filtration in all the regions corresponding to the flow dividing chambers, so that the maximum filtration capacity can be exhibited without waste in the entire filter material layer. Further, since the filtration is performed through the upper and lower two filter medium layers, the purification efficiency is improved. Furthermore, since there is no water passage hole in the bottom wall of the bottom tray, when pulling the filter case out of water for cleaning or replacement of the filter medium, unless the case is extremely tilted or turned upside down,
The sludge accumulated inside will not flow out.

In the present invention, when the lower water diversion chamber and the upper water diversion chamber are alternately arranged in the circumferential direction around the discharge pipe, the water around the filtration case is evenly distributed. It has the advantage that it can be sucked and the dust in the water can be filtered out more efficiently.

Further, in the opening of the upper wall portion of the upper cover,
When a cross-shaped flow dividing frame is formed, purified water is diffused in all directions in the aquarium, which creates a circulating water flow and allows the water in the aquarium to be thoroughly filtered. There is. In addition, since the bubbles generated from the bubble generating means by the flow dividing frame hit the frame and are miniaturized, the aesthetic appearance in the use mode is improved.

In the aquarium filtration device in which the diversion frame body is formed, the upper cover is made of a synthetic resin integrally molded product having a substantially square shape in plan view, and the diversion frame body is formed by each cross-shaped crosspiece. Is arranged so as to be perpendicular to each side of the upper cover upper wall portion in a plan view, the gate provided in the central portion of the cross-shaped flow dividing frame body in forming the flow dividing frame body. Molding the upper cover by injecting molding resin from each of them and using each bar as a runner, the removal work of the runner can be omitted, and the molding of the upper cover is easy. Can be done. Further, since the cross-shaped crosspieces are arranged so as to be perpendicular to the respective sides of the upper cover upper wall portion in a plan view, the synthetic resin flowing in from the runner can easily reach every corner of the mold. It can be spread over and the upper cover can be molded with high yield.

[Brief description of drawings]

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

FIG. 2 is a perspective view showing an exploded view of the aquarium filtration device of the embodiment.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is a sectional view taken along the line IV-IV of FIG. 3 in the overall image.

5 is a sectional view taken along line VV of FIG.

[Explanation of symbols]

1 ... Top cover 1a ... upper wall 1b ... peripheral wall 1c ... opening 2 ... Bottom tray 2a ... bottom wall 2b ... peripheral wall 3 ... Partition member 3a ... Horizontal partition plate 4 ... Filter material layer 4a ... Upper filter medium layer 4b ... lower filter medium layer 5… Air stone (air bubble generating means) 8 ... Filtration case 9 ... Downstream room 10 ... Upstream room 10A ... Dividing chamber for lower water 10B ... Dividing chamber for upper water 11a ... pipe hole 12 ... Dividing frame 13a ... Radial partition wall 13b ... Arc-shaped partition 14 ... bulge 16 ... Upper water absorption hole 19 ... Water absorption taxiway

Claims (4)

[Claims] 1. A large number of filters are provided in a filtration case, which comprises a bottom tray having a bottom wall portion and a peripheral wall portion without water passage holes, and an upper cover having a top wall portion and a peripheral wall portion and fitted over the bottom tray. A partition member integrally formed with an upright discharge pipe is housed in the center of a horizontal partition plate having a water passage hole, and the upper end surface of the discharge pipe is the peripheral edge of the opening provided in the center of the upper wall of the upper cover. And a bubble generating means for discharging bubbles in the discharge pipe, a downstream chamber is provided below the horizontal partition plate in the filtration case, and the downstream chamber is in the discharge pipe. On the other hand, two filter media layers having different filter media are provided on the upper side of the horizontal partition plate, and an upstream chamber is formed between the upper filter media layer and the upper wall of the upper cover. Provided on the inner surface of the upper wall of the upper cover so as to project downward. The partition walls are divided into a plurality of flow dividing chambers, and the plurality of flow dividing chambers are connected to a water absorption guideway that extends vertically along the peripheral wall of the upper cover and has a lower end that opens near the bottom wall of the bottom tray. And a lower water flow dividing chamber and an upper water flow dividing chamber that communicates with an upper water absorption hole provided in an upper cover. 2. The aquarium filtration device according to claim 1, wherein the lower water flow dividing chamber and the upper water flow dividing chamber are alternately arranged in a circumferential direction around the discharge pipe. 3. A cross-shaped flow-dividing frame body is formed in an opening of the upper wall portion of the upper cover.
The aquarium filtration device according to any one of 1. 4. The upper cover is made of a synthetic resin integrally molded product having a substantially rectangular shape in a plan view, and the flow dividing frame includes each cross-shaped crosspiece of each of the upper cover upper wall portions in a plan view. The aquarium filtration device according to claim 3, wherein the aquarium filtration device is arranged so as to be perpendicular to the sides.