JP2001259316A - Water tank filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water tank filter which has high purification efficiency and prevents the discharge of sludge in the inside when pulled up from water. SOLUTION: A partition member 3 with a discharge pipe 30 is housed in a filter case 10 in which an upper part cover 1 is engaged with a bottom tray 2, the upper part of the pipe 30 protrudes outside the opening part 11 of the cover 1, the tray 2 is divided into upper and lower parts by a horizontal partition plate 3a of the member 3, a lower side downstream chamber 20a communicates with the pipe 30, upper and lower filter medium layers 4A, 4B are formed on the upper side, a water suction passage 8 in which the lower end is opened and the upper end is made to communicate with an upstream chamber 18 on the upper filter medium layer 4A is formed between the circumferential wall parts 2a, 1a of the tray 2 and the cover 1, and an ascending water flow associated with the discharge of bubbles from an air stone 5 in the pipe 30, water sucked from the passage 8 passes through the layers 4A, 4B and is discharged upward through the chamber 20a and the pipe 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention utilizes an airlift effect when air supplied from an air pump is set as a bubble in an aquarium for viewing and breeding aquatic organisms such as goldfish and tropical fish. And a water tank filtration device for suction-filtering water.

[0002]

2. Description of the Related Art In general, this type of aquarium filtration apparatus is provided with an upright discharge pipe in a filtration case loaded with a filter medium, and discharges air supplied from an air pump as bubbles into the inside of the discharge pipe. Due to the air lift effect at the time of being discharged upward through, a rising water flow is generated in the discharge pipe, and the negative pressure in the filtration case accompanying the generation of the rising water flow sucks dirty water in the water tank, The water is purified through a filter medium and discharged from the discharge pipe.

[0003] In the conventional water tank filtration apparatus, however, a packing layer of granular material such as gravel is provided as a filter material in the lower portion of the filter case, and a porous mat such as a non-woven fabric is disposed in the upper portion. By allowing the water sucked from the holes to pass through the granular material packed layer, the water sucked from the suction holes provided at the upper part of the case is allowed to pass through the porous mat,
A configuration in which purified water is combined by 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,
JP-A-10-75685 and the like).

[0004]

However, in the above-mentioned conventional water tank filtration apparatus, since the suction water from the bottom side and the upper side of the filtration case is each filtered by a single filter medium, the purification efficiency is low. In particular, since the intake water on the bottom side contains a lot of dirt such as feces and residual food deposited on the bottom of the water tank, dirt cannot be sufficiently removed only by passing between the particles of the granular material packed layer, and the dirt is removed. There is a drawback that the dirt is discharged from the discharge pipe while being contained, and the dirt is diffused in the water tank. In addition, in this type of filtration device, if the filter medium is clogged after a certain period of time, the filter case is pulled up from the water to perform cleaning or replacement of the filter medium. There is also a problem that the sludge accumulated between the particles in the granular material packed layer flows out of the suction hole at the bottom of the case together with the internal water when the water is pulled up, and the water in the water tank is contaminated by the sludge.

In view of the above-mentioned circumstances, the present invention provides a water tank filtration device that suction-filters water by an air lift effect when air bubbles are released. It aims to provide a filter that can be filtered efficiently, sufficiently purified and discharged into a water tank, and that does not cause sludge accumulated inside when the filter case is pulled out of the water for cleaning or filter medium replacement. I have.

[0006]

To achieve the above object, a water tank filtration apparatus according to the first aspect of the present invention comprises a bottom tray having a bottom wall and a peripheral wall without water holes, an upper wall, 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 holes is accommodated in a filtration case having a peripheral wall portion and an upper cover fitted on a bottom tray. The upper portion of the discharge pipe protrudes outward from an opening provided in the center of the upper wall of the upper cover, and a bubble generating means for releasing bubbles in the discharge pipe is provided. The partition plate is partitioned into an upper filter medium filling chamber and a lower downstream chamber, and this downstream chamber communicates with the discharge pipe, while the filter medium filling chamber is provided with two upper and lower filter medium layers having different filter media. Between the filter media layer and the upper cover An upstream chamber is formed, and a water suction passage having a lower end opened to the outside and an upper end connected to the upstream chamber is provided between the peripheral wall portions of the bottom tray and the upper cover, and is discharged by the bubble generating means. As a result of the rising water flow generated in the discharge pipe as the bubbles rise, the water sucked from the water suction passage sequentially passes through the two filter medium layers and is discharged upward through the downstream chamber and the drain pipe. It is configured.

In this water tank filtration device, the lower end of the water absorption passage formed between the bottom tray and the peripheral wall of the upper cover serves as a suction port, and sucks water near the bottom of the water tank, which is often contaminated with feces and residual food. Since this water is filtered through the upper and lower filter medium layers, dirt contained therein is efficiently removed and returned to the water tank as clear purified water. In addition, since the bottom wall of the bottom tray does not have a water suction port, when the filter case is pulled out of the water for cleaning or filter medium replacement, the filter case remains inside unless the case is extremely tilted or turned upside down. Sludge does not flow out.

Thus, in such a water tank filtration device, a ridge-shaped outwardly bulging portion is formed along a vertical direction at a plurality of locations on the peripheral wall of the upper cover. If the structure in which the inside of the outlet part forms the above-mentioned water absorption passage is adopted, the water absorption passage becomes duct-like, and the flow speed of the water to be sucked in increases, so that the dirt deposited on the bottom of the water tank is easily sucked together with the water. Further, if the upper cover has an upper water inlet facing the upstream chamber as in the invention of claim 3, the water sucked from the upper water inlet also has two upper and lower filter medium layers. Since the water is permeated, the dirt and dust floating in the water without sinking can also be removed by suction.

On the other hand, in such a water tank filtration device,
If the water intake passage is provided at least on both sides of the drainage pipe as in the invention of claim 4, the flow of the treated water inside the filtration case is not biased, and the filtration capacity of the filter medium layer is efficiently increased. Can demonstrate. Further, as in the invention according to claim 5, a plurality of partition walls radially arranged around the opening are integrally protruded on the inner surface side of the upper wall portion of the upper cover,
The upstream chamber is divided into a plurality of flow dividing chambers by these partition walls, and if the water absorption passage is connected to each of the flow dividing chambers, the water to be treated flows into each of the flow dividing chambers, so that the entire filter medium layer is formed. While being able to demonstrate the maximum filtration capacity without waste,
The partition functions also as a press for preventing the upper filter medium layer from rising.

The filter media of the upper filter media layer and the lower filter media layer are not particularly limited as long as they are different from each other. However, the viewpoint of sufficiently securing the filtration removability of dirt, water permeability, and the propagation of bacteria that decompose and consume dirt is sufficiently ensured. Therefore, it is preferable that the upper filter medium layer is made of a porous mat having high filtration and removability, and the lower filter medium layer is formed of a granular material-filled layer having a small water resistance.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a water tank filtration device according to an embodiment of the present invention will be specifically described with reference to the drawings. 1 to 6, (1) is an upper cover, (2)
Is a bottom tray, (3) is a partition member, (4A) is an upper filter medium layer made of a porous mat such as a nonwoven fabric, (4B) is a lower filter medium layer made of a layer filled with particulate matter such as gravel, and (5) is an air stone. , (6) is a snowboard, and (7) is an elbow member for connecting an air supply tube. The upper cover (1), the bottom tray (2), the partition member (3) and the elbow member (7)
Are all made of an integral molded product of a hard transparent synthetic resin.

The upper cover (1) has an upper wall (1a),
The peripheral wall portion (1b) hanging down from the peripheral edge forms a box shape which is substantially square in plan view and opened downward. This upper wall (1
a) has a circular opening (11) in the center,
As shown in FIGS. 4 and 5, the opening (11) is provided on the back side.
A plurality of (eight in the figure) partitions (12)... Arranged radially around the center are projected. In addition, the peripheral wall (1b)
Has a pair of left and right ridge-shaped outwardly bulging portions (13) (13) along the vertical direction on each side surface, and a central portion of one of the opposing side surfaces is provided with an upwardly extending lower edge. A locking piece (1) formed between a pair of thin notches (14)
5), and a locking projection (15a) swelling in a substantially semicircular shape is provided on the outer surface side of the locking piece (15). To the semicircular notch (1
6) and a plurality (four in the figure) of slit-shaped upper suction ports (17) reaching the peripheral portion of the upper wall portion (1a) from slightly above the semicircular cutout portion (16). ing.

The bottom tray (2) has a bottom wall portion (2a) having no water passage hole and a peripheral wall portion (2b) rising from the peripheral edge thereof, and is formed in a box shape which is substantially square in plan view and opened upward. The peripheral edge of the wall portion (2a) slightly protrudes outward from the lower end of the peripheral wall portion (2b) to form a cover receiving portion (2c). On the inner surface side of the bottom wall portion (2a), an air discharge pipe (21) standing upright at a central position, and a horizontal tubular ventilation path extending from a lower end portion of the air discharge pipe (21) to the peripheral wall portion (2b). (22)
And the upper cover (1) except for the position of the ventilation path (22).
A plurality of (seven in the figure) strips (23) arranged radially corresponding to the partition walls (17) are integrally formed. Also, of the four circumferences of the peripheral wall portion (2b), the central portion of one of the opposing side surfaces becomes a concave portion (24), and a slit hole (25a) vertically penetrating the upper edge of the concave portion (24).
Is provided with a locking frame (25).

The partition member (3) is composed of a horizontal partition plate (3a) having a large number of long water holes (31) and a peripheral wall portion (3b) rising from the peripheral edge of the horizontal partition plate (3a). An upright discharge pipe (30) is formed integrally at the center of the horizontal partition plate (3a), and is formed along the radial direction from the root of the discharge pipe (30) to the peripheral wall (3b). The bottom surface side of the horizontal partition plate (3a) has a ventilation path outer fitting portion (35) recessed in a semicircular cross section. Then, of the four circumferences of the peripheral wall portion (3b), each central portion of one of the opposite side surfaces forms a concave portion (32) corresponding to the concave portion (24) of the bottom tray (2), and the other opposing two sides. A pair of left and right holding pieces (33) (3)
3), and a receiving piece (34) is protrudingly provided at the center of each inner surface of the four circumferences of the peripheral wall portion (3b).

The air stone (5) is a porous hollow shaft made of a rigid synthetic resin foam or the like, and has a closed upper end. The snowboard (6) is made of a semi-rigid synthetic resin molded article having a substantially square plate shape, and has a circular hole (61) at the center.
, A large number of elongate water holes (62), and concave portions (63) provided in the peripheral portion on one surface side to which the pressing pieces (33) of the partition member (3) fit. I have. Further, the porous mat constituting the upper filter medium layer (4A) also has a circular hole (41) formed in the center.

In order to assemble the aquarium filtration device, the lower part of the air stone (5) is inserted into the air discharge pipe (21) of the bottom tray (2), and one end of the elbow member (7) is connected to the air passage. On the other hand, a granular material such as gravel constituting the lower filter medium layer (4B) is placed on the horizontal partition plate (3a) of the partition member (3) while being fitted into the opening of (22), and the snowboard plate (6) is placed thereon. ) Is pressed around the pressing piece (33) ... and the receiving piece (3).
4), and the partition member (3) is fitted inside the bottom tray (2) so that the outside fitting portion (35) of the ventilation path covers the ventilation path (22). Further, a porous mat of the upper filter medium layer (4A) is placed thereon, and the upper cover (1) is fitted over the bottom tray (2), so that the filter case (1) is fitted.
0). At this time, the locking pieces (15) on both sides of the upper cover (1) are inserted into the slit holes (25) of the bottom tray (2).
a), and the locking projections (15a) are fitted to the locking frames (2).
5) While engaging with the lower edge, the semicircular notch (16) is aligned with the insertion portion of the elbow member (7). The dimensions of each component are set so that such an assembly can be performed.

The aquarium filtration device thus assembled is:
As shown in FIGS. 2 and 3, the upper part of the discharge pipe (30) of the partition member (3) housed in the filtration case (10) projects outward from the opening (11) of the upper cover (1).
The inside of the bottom tray (2) is partitioned into an upper filter material filling chamber (20a) and a lower downstream chamber (20b) by the partition plate (3a), and the filter sheet filling chamber (20a) has a veneer board (6). ), A filter medium layer (4) having a two-layer structure composed of an upper filter medium layer (4A) and a lower filter medium layer (4B) is arranged so as to surround the discharge pipe (30), and the downstream chamber (20b). ) Communicates with the discharge pipe (30). An upstream chamber (18) is formed between the upper surface of the upper filter medium layer (4A) and the upper wall (1a) of the upper cover (1).

On the other hand, an upper cover (1) and a bottom tray (2)
Between the peripheral wall portions (1b) and (2b) of the upper cover (1), a duct-shaped water absorption passage (8) is formed along the vertical direction at the inside of each outwardly bulging portion (13) of the upper cover (1). I have. And each water suction channel (8) opens to the outside at the lower end,
The upper end communicates with the upstream chamber (18). The upper water absorption holes (17) provided in the upper cover (1) have upper portions facing the upstream chamber (18).

Here, the upper wall (1) of the upper cover (1)
The partition walls (1) protruding from the inner surface side of (a) and radially arranged.
2)... Function to function as a spacer for holding the porous mat of the upper filter medium layer (4A) to prevent the upper filter medium layer (4A) from floating, and for securing a space for the upstream chamber (18) in the upper part of the filter case (10). At the same time, the upstream chamber (18) is divided into a plurality of (eight in the figure) branching chambers (18a) as shown in FIG. Thus, one of the water suction passages (8) communicates with each of the flow dividing chambers (18a). Also, a strip (2) provided on the upper surface side of the bottom wall (2a) of the bottom tray (2).
3) receive the partition member (3), but like the partition (12) on the upper cover (1) side, the filtration case (1)
0) functions as a spacer for securing a space for the downstream chamber (20b) in the lower portion, and partitions the downstream chamber (20b) in the same manner as the upstream chamber (18).

In the water tank filtration device having such a configuration, an air supply tube of an air pump is connected to the elbow member (7),
When the air pump is operated by setting the water pump at the bottom of the aquarium for viewing and raising aquatic organisms, the air supplied to the inside of the air stone (5) through the air passage (22) is discharged to the surface of the air stone (5). Are discharged to the outside as fine bubbles, and as the bubbles rise, a rising water flow is generated in the inner space (19) of the discharge pipe (30), so that the inside of the filtration case (10) becomes negative pressure. As a result, the external water flows from the water absorption passage (8) and the upper water absorption hole (17) to the upstream chamber (1).
8) The water is sucked into, and all the sucked water is purified in the process of sequentially passing through the upper filter medium layer (4A) and the lower filter medium layer (4B), and is discharged from the downstream chamber (20b) to the discharge pipe (30).
It enters inside and is discharged upward.

Here, since the suction ports at the lower ends of the water suction passages (8) are located near the bottom of the water tank, the water suction pipes (8) inhale dirt-rich water such as feces deposited on the water bottom and residual food. Due to the filtration through the filter medium layer, the contained dirt is efficiently removed and returned into the water tank as clear purified water. In particular, in the configuration of this embodiment, since the water suction passages (8) are formed in a duct shape, the flow rate of the water to be sucked in is high, the dirt deposited on the bottom of the water tank is easily sucked together with the water, and the water suction passages (8) are connected to the water suction passages (8). The structure of the upper cover (1) and the bottom tray (2) to be provided is simplified. Further, by suction from the upper water absorption holes (17), dirt and dust floating in the water without settling are surely removed.

Further, in this embodiment, the upstream chamber (1
8) are divided into a plurality of flow dividing chambers (1) by radially arranged partitions (2) on the inner surface side of the upper wall (1a) of the upper cover (1).
8a).., And the flow of treated water in the filtration case (10) is not biased because the water suction passage (8) communicates with each of the branching chambers (18a). In (4), the filtration is performed in all regions corresponding to the respective diversion chambers (18a), and the entire filtration medium layer (4) can exhibit the maximum filtration capacity without waste.

On the other hand, if the filter medium layer (4) is clogged or the amount of waste inside becomes full due to long-term use, the filter case (10) is pulled out of the water to perform cleaning or filter medium replacement. However, since the bottom wall of the bottom tray (2) has no water absorption hole and the water absorption passages (8) are communicated with the inside of the case (10) at the top, the case (10) ) Is not tilted upside down or turned upside down, the sludge accumulated inside will not flow out, and there is no problem that the sludge flowing out at the time of lifting is diffused and polluted with water unlike the conventional one.

In the above embodiment, the filtration case (10)
Although a pair of left and right water suction channels (8) are provided on each side surface of the four circumferences, the number and arrangement of the water suction channels (8) can be variously set other than in the embodiment. Thus, in order to suppress the unevenness of the treated water in the case (10) and balance the filtration and removal of the filth by the filter medium layer (4), the water suction passage (8) is provided at least on both sides of the drain pipe (30). Is recommended. The same applies to the upper water absorption hole (17). The filter media of the upper filter media layer (4A) and the lower filter media layer (4B) are not particularly limited as long as they are different from each other. From the viewpoint of sufficiently securing, as in the above-described embodiment,
It is preferable that a porous mat such as a non-woven fabric or the like having high removability is used for the upper filter medium layer (4A) and the lower filter medium layer (4B) is a layer filled with granular material such as gravel having low water resistance.

On the other hand, the filtration device shown in the embodiment
In order to increase the suction force by the air lift effect, the discharge pipe (30) has a short length slightly protruding from the filter case (10), the upper end thereof is reduced in diameter, and the upper end of the air stone (5) is discharged. Although it is close to the upper end of the pipe (30), the discharge pipe (30) may be a long one protruding largely from the filtration case (10) as in the conventional case. Further, in the above-described embodiment, the veneer board (6) is interposed between the upper filter medium layer (4A) and the lower filter medium layer (4B), but such a vase board (6) can be omitted. In addition, in the present invention, the outer shapes of the upper cover (1) and the bottom tray (2) and their engagement structure, the cross-sectional shape of the water suction passage (8), the partition plate (3a) of the partition member (3). Regarding the detailed configuration such as the shape and arrangement of the water holes (31)...

[0026]

According to the first aspect of the present invention, an air lift for releasing air supplied from an air pump as air bubbles by setting the water supplied to the bottom of an aquarium for watching and breeding aquatic organisms such as goldfish and tropical fish. As a water tank filtration device that suction-filters water by its effect, the water sucked from the water suction passage provided between the upper cover of the filtration case and the side wall of the bottom tray is passed through the upper and lower filter media layers, so that the purification efficiency is high. In addition to being able to efficiently purify the water inhaled from near the bottom of the aquarium, which is very dirty, and discharge it into the aquarium as sufficient clarified water, the sludge that has accumulated inside when the filter case is pulled out of the water for cleaning or replacing the filter medium is removed. A product which does not cause outflow and has excellent handleability is provided.

According to the second aspect of the present invention, since the above-mentioned water tank filtering device is provided with a duct-shaped water suction passage in which the flow rate of the suction water is high, the dirt deposited on the bottom of the water tank is efficiently sucked together with the water and filtered. In addition to being able to be removed, there is an advantage that the structures of the upper cover and the bottom tray for providing the water suction passage are simplified, and these members can be manufactured at low cost.

According to the third aspect of the present invention, as the above-mentioned water tank filtering device, water can be absorbed from the upper part of the filtering case and purified by passing through the upper and lower filter medium layers, so that it floats in the water without sedimentation. What can be reliably removed by suctioning dirt and dust is provided.

According to the fourth aspect of the present invention, in the above-described water tank filtration device, since the water suction passage is provided at least on both sides of the drain pipe, the flow of the treated water inside the filtration case is not biased, and the filter medium layer is formed. There is an advantage that the filtration ability can be efficiently exhibited.

According to the fifth aspect of the present invention, in the above-described water tank filtration device, the upstream chamber into which the treated water in the upper part of the filtration case flows is divided into a plurality of flow dividing chambers by partition walls, and each of the flow dividing chambers has a water suction passage. Because of the communication, there is a point that the maximum filtration capacity can be exhibited without waste in the entire filter medium layer.

According to the sixth aspect of the present invention, there is provided, as the above-mentioned water tank filtration device, a device capable of sufficiently securing filtration removability of dirt, water permeability, propagation of bacteria that decompose and consume dirt, and the like.

[Brief description of the drawings]

1A and 1B show a water tank filtration device according to an embodiment of the present invention, wherein FIG. 1A is a plan view, FIG. 1B is a front view, and FIG. 1C is a right side view.

FIG. 2 is a sectional view taken along line II-II in FIG.

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

FIG. 4 is a sectional view taken along line IV-IV in FIG. 2;

FIG. 5 is an exploded perspective view showing an upper cover, a porous mat of an upper filter medium layer, and a sawboard of the water tank filtration device.

FIG. 6 is an exploded perspective view showing a partition member and a bottom tray of the water tank filtration device.

[Description of Signs] 1 top cover 1a top wall 1b side wall 2 bottom tray 2a bottom wall 2b side wall 3a partition member 3a horizontal partition plate 4 filter medium layer 4A top filter medium layer 4B ... lower filter medium layer 5 ... air stone (bubble generating means) 8 ... water absorption channel 10 ... filtration case 11 ... opening 12 ... partition 13 ... outward swelling part 17 ... upper water absorption hole 18 ... upstream chamber 18a ... diversion chamber 19 ... Internal space 20a: Filter material filling chamber 20b: Downstream chamber 30: Discharge pipe 31: Water hole

Claims (6)

[Claims] 1. A filter case comprising: a bottom tray having a bottom wall and a peripheral wall without water holes; and an upper cover having an upper wall and a peripheral wall and fitted on the bottom tray. A partition member integrally formed with an upright discharge pipe is accommodated in the center of a horizontal partition plate provided with water passage holes, and the upper portion of the discharge pipe projects outward from an opening provided in the center of the upper wall of the upper cover. And a bubble generating means for releasing bubbles in the discharge pipe, wherein the inside of the bottom tray is partitioned into an upper filter material filling chamber and a lower downstream chamber by a horizontal partition plate of a partition member, and this downstream chamber is While communicating with the discharge pipe, the filter medium filling chamber is provided with two upper and lower filter medium layers having different filter media, an upstream chamber is formed between the upper filter medium layer and the upper wall of the upper cover, and a bottom tray and Remove the lower end between the peripheral parts of the top cover. And a water suction passage having an upper end communicating with the upstream chamber is provided, and the water sucked in from the water suction passage by a rising water flow generated in the discharge pipe due to the rise of bubbles released by the bubble generation means. Is a water tank filtration device configured to sequentially pass through the two filter medium layers and to be discharged upward through a downstream chamber and a drain pipe. 2. The aquarium filtration device according to claim 1, wherein ridge-shaped outwardly bulging portions are formed along a vertical direction at a plurality of locations on a peripheral wall portion of the upper cover, and the inside of each bulging portion forms the water absorption path. . 3. The water tank filtration device according to claim 1, wherein the upper cover has an upper water suction port facing the upstream chamber. 4. The water tank filtration device according to claim 1, wherein the water suction passage is provided at least on both sides of the drain pipe. 5. A plurality of partition walls radially arranged around the opening and integrally protruding from the inner surface side of the upper wall of the upper cover, and the upstream chamber is partitioned into a plurality of branch chambers by these partition walls. The water tank filtration device according to any one of claims 1 to 4, wherein the water suction passage communicates with each of the flow dividing chambers. 6. The aquarium filtration device according to claim 1, wherein the upper filter medium layer is formed of a porous mat, and the lower filter medium layer is formed of a granular material packed layer.