JPH0938637A - Filtering device for water tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filtering device to be disposed in a water tank for ornamental fish such as goldfish and tropical fish and to remove contamination and odor in a water after filtered by a filter by adsorption to active carbon in a filter case. SOLUTION: A filtering chamber Fu in a filter case C is divided into an upstream chamber 32 connected to a water sucking port 3 and a downstream chamber 33 connected to a discharging port 2 by a filter 26 housed in the chamber Fu. A cartridge Cc filled with active carbon 39 is housed on the downstream chamber 33 so that the cartridge can be easily attached and detached. The water passed through the filter 26 is further passed through the active carbon 39 in the cartridge Cc.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a filtering device for filtering water in an aquarium for breeding and growing ornamental fish such as goldfish, tropical fish and saltwater fish.

[0002]

BACKGROUND OF THE INVENTION Generally, ornamental fish such as goldfish and tropical fish are bred.
As a filtration device for filtering water in an aquarium for aquariums for growing, an internal filtration device is well known in which the filtration device is immersed in water in the aquarium and the water is circulated and filtered. , Such an internal filtration device is widely used because of its high filtration efficiency and relatively low cost (see the book "Tropical fish keeping and illness" by Shigetoshi Umezu, published by Takahashi Shoten). .

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention Incidentally, when fresh water is put in an aquarium or when ornamental fish are newly raised or water is changed, the water quality is deteriorated. May cause turbidity in water or give off a foul odor.In such a case, it is effective to temporarily use a purifying agent such as activated carbon to purify water. Purifying agents are generally inconvenient to handle, and when immersed in water in an aquarium for use, it is common to put them in a net bag, etc., so they may be scattered in water. There is a problem that the appearance is not good, and there is another problem that the purifying agent cannot exert a sufficient purifying function in water.

The present invention has been made in view of the above circumstances, and in order to solve the above-mentioned problems, the cleaning agent can be easily and removably mounted in a filtration case, and has a cleaning function by the cleaning agent. Another object of the present invention is to provide a novel filtration device.

[0005]

To achieve the above object, according to the present invention, a cylindrical filter medium is housed in a filter chamber formed in a filter case installed in a water tank. By forming an upstream chamber communicating with the water suction port on the outside of the filter medium and a downstream chamber communicating with the discharge port on the inside of the filter medium, and by supplying air from the air pump to the downstream chamber, After filtering the water in the water tank from the upstream chamber by passing through the filter medium, the water tank is returned to the water tank through the downstream chamber, in the downstream chamber inside the cylindrical filter medium in the water tank filtering device. The purifying agent cartridge is detachably accommodated, and the purifying agent cartridge is formed in a double-cylinder shape having an inner cylinder and an outer cylinder each having a mesh formed on the entire circumference, and is annularly accommodated between the inner cylinder and the outer cylinder. The cleaning agent is contained in the section, Filtered water that has passed through the timber is characterized in that so as to be discharged to the outside from the discharge port through the purifying agent.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to a preferred embodiment of the present invention shown in the accompanying drawings.

FIG. 1 is a vertical side view of the filtration device, and FIG.
1 is a cross-sectional view taken along line 2-2 of FIG. 1, FIG. 3 is an exploded perspective view of a filtration device, and FIG. 4 is a partially cutaway perspective view of an activated carbon cartridge.

The filtration case C provided in the water tank V comprises a transparent or semi-transparent octagonal tubular case main body C ₁ and an octagonal dish-shaped bottom lid which is detachably fitted to the open lower surface thereof. It is composed of C ₂ . The case subject C ₁ is
It is molded from a transparent or semi-transparent hard synthetic resin material, and its lower surface is open over the entire surface. In the central portion of the upper surface 1 of the case main body C ₁ , a discharge port 2 is integrally provided so as to project upward and a plurality of upper water suction ports 3 are provided around the discharge port 2.
Has been drilled. Further, a pair of insertion tongue pieces 4 is formed at the facing portion of the lower side edge of the case main body C ₁ .

The bottom cover C ₂ is made of the same material as the case main body C ₁ and has the same shape as that of the case main body C _{1. A} plurality of lower water suction ports 7 are radially formed on the bottom surface 6 of the case main body C ₁ and the central portion thereof is provided. An air supply port 8 having an open upper end is formed,
The air supply port 8 is connected to an air supply passage 9 which is opened on the outer surface of the bottom cover C ₂ . An air stone 10 made of a porous material for air diffusion is fitted at the outlet of the air supply port 8. A connection pipe 12 connected to the air pipe 45 is connected to the open end of the air supply passage 9, and an air pump Pa is connected to the outer end of the air pipe 45.

The bottom cover C ₂ is filled with small weights 13 and small stones 13 such as Oiso which act as a coarse filter medium, and the upper surface of the opening is closed by a cover plate 14. Circulation ports 15 are opened on the entire surface of the cover plate 14, and the inside of the bottom cover C ₂ passes through the circulation ports 15 and the case main body C is formed.
Is formed in _one, the downstream chamber 33 of the upper filter compartment Fu later
Is communicated to. Further, the air supply port 8 also penetrates the cover plate 14,
It communicates with the downstream chamber 33 via the air stone 10. A pair of insertion holes 16 are integrally formed on the opposite side surfaces of the bottom cover C _{2. By} inserting the insertion tongues 4 into the insertion holes 16, the bottom cover C 2 is inserted. ₂ above case main body C
₁ is assembled and the filtration case C is formed.

Next, the structure of the filter medium holding frame F housed in the filter case C formed by the case body C ₁ and the bottom cover C ₂ will be described. This is as shown clearly in FIG. A circular drainage port 18 is opened in the central portion and an outer periphery is formed in a wavy shape, and an octagonal bottom plate 19 is integrally connected by a plurality of connecting rods 20.
A circular communication port 21 that can communicate with the air supply port 8 is opened in the center of the bottom plate 19, and a large number of small holes 22 are formed around the circular communication port 21. It communicates with the flow port 15 of the plate 14. On the lower surface of the top plate 17,
A plurality of upper locking protrusions 23 extending downward at equal intervals are integrally provided around the discharge port 18, and the bottom plate 19 is also provided.
Lower engaging protrusions 24 corresponding to the upper engaging protrusions 23 are also provided on the upper surface of the peripheral portion of the communicating port 21 at equal intervals.

The filter medium holding frame F formed as described above holds the plate-like dense filter medium 26 in a replaceable manner.
The plate-like filter medium 26 is bent in a corrugated shape by alternately engaging the inner peripheral surface of the connecting rod 20 with the connecting rod 20 and the outer peripheral surfaces of the upper and lower engaging protrusions 23, 24 in a zigzag shape. By making their both end edges 26e collide with each other, they are formed into a tubular shape and held by the filter medium holding frame F. The top plate 17 of the filter medium holding frame F is divided into right and left portions at positions corresponding to the abutting portions of both end edges 26e of the filter medium 26. The divided edges 17 ₁ and 17 _{2 of the} top plate 17 are engaged with each other in a disengageable manner.

Fitting holes 30 are formed in the respective corners of the cover plate 14 of the octagonal bottom cover C ₂ , and the lower ends of the connecting rods 20 of the filter medium holding frame F are drawn into these fitting holes 30. The filter medium holding frame F can be held at a predetermined position on the bottom cover C ₂ by inserting it freely.

After the filter medium holding frame F is held at a predetermined position on the bottom cover C ₂ as described above, the case main body C ₁ is put on the filter medium holding frame F from the bottom face of the opening, and the insertion tongue is inserted. Piece 4
The filter case C can be assembled by accommodating the filter medium holding frame F inside by inserting and locking the filter medium into the insertion hole 16, and the upper filter chamber Fu and the bottom cover C ₂ can be provided in the case body C ₁ . Lower filtration chambers Fd are formed therein. The inside of the upper filtration chamber Fu is an upstream chamber outside of the filter chamber 26, that is, the unclean chamber 32, and a downstream chamber inside thereof, that is, the clean chamber 3 by the filter medium 26.
3, the upstream chamber 32 is communicated with the outside through the upper water inlet 3, and the downstream chamber 33 is connected to the outlet 2.
Through the small hole 22, the flow port 15
Through the lower filtration chamber Fd.

An activated carbon cartridge Cc shown in FIG. 4 is removably accommodated in the downstream chamber, that is, the clean chamber 33, which is formed in the central portion of the filtration case C.

Next, the structure of the activated carbon cartridge Cc will be described mainly with reference to FIG. 4. This is a soft synthetic resin cartridge body 3 integrally molded by a molding die.
5 and the lid 36. The cartridge main body 35 has inner and outer cylinders 35i and 35o and is formed in a bottomed double cylinder shape, and an inlet / outlet 37 is opened on the upper surface thereof. A purifying agent, that is, granular activated carbon 39 is loaded in the annular housing portion 38 formed between the inner and outer cylinders 35i and 35o. Meshes 40 and 41 are formed on the outer peripheral surfaces of the inner and outer cylinders 35i and 35o, respectively, over substantially the entire circumference thereof, and the meshes of these meshes 40 and 41 are formed to be smaller than the minimum particle size of the activated carbon 39. Is
The activated carbon 39 in the annular housing portion 38 is prevented from leaking to the outside. The mesh 40 of the inner cylinder 35i has
It has a two-stage slit shape and the mesh 4 of the outer cylinder 35o.
The first eye is a grid.

The doughnut-shaped lid 36 is detachably fitted to the entrance 37 on the upper surface of the cartridge body 35.
The lid 36 seals the annular housing portion 38. The upper end of the inner cylinder 35i is opened to the outside through a through hole 36 ₁ formed in the lid 35. Also, as shown in FIG.
An annular fitting protrusion 43 is integrally formed at the center of the bottom wall of the cartridge body 35.
Is a communication port 21 formed in the bottom plate 19 of the filter medium holding frame F.
It has a diameter that allows it to be detachably and tightly fitted.

The activated carbon cartridge Cc formed as described above is formed to have a diameter slightly smaller than the circular drainage port 18 opened in the top plate 17 of the filter medium holding frame F, and the cartridge Cc has the above-mentioned drainage port. As shown in FIG. 1, penetrating 18 and is detachably accommodated in a downstream chamber, that is, a clean chamber 33 formed inside the filter medium 26. The upper end of the outer peripheral surface of the cartridge Cc is fitted into the drain port 18 so that there is no gap, and the fitting protrusion 43 on the bottom surface of the cartridge Cc is tightly fitted into the communication port 21 of the bottom plate 19. This activated carbon cartridge Cc,
It can be fixed in the downstream chamber 33. The upper surface of the cartridge Cc can be substantially flush with the upper surface of the top plate 17.

Next, the operation of this embodiment will be described. After the activated carbon cartridge Cc is fixedly installed in the downstream chamber 33 of the filtration case C as shown in FIG. 1, the filtration case C is placed at an appropriate position in the water tank V. To install. At this time, the bottom cover C ₂ is embedded in a small stone group such as Oiso attached to the water tank V. If the air pump Pa connected to the air pipe 45 is driven here, the pressurized air from there will be the air pipe 40, the connection pipe 12, the air supply passage 9, the air supply port 8.
Air bubbles are jetted into the downstream chamber 33 through the air stones 10, and the jetted air becomes an air current and rises in the downstream chamber 33. Accordingly, the water in the downstream chamber 33 also rises and passes through the discharge port 2. Is discharged outside the water tank V. As a result, the downstream chamber 3
The water in the water tank V is divided into two systems by the water absorbing force acting on the inside of the water tank 3, and the water is sucked into the filtration case C and filtered. That is, a part of the water in the water tank V is sucked into the unpurified chamber, that is, the upstream chamber 32 from the upper water inlet 3 of the case main body C ₁ as shown by the arrow a in FIG. 1, and is filtered through the dense filter medium 26. Then, the clean room, that is, the downstream room 33 is entered. Further, as shown by an arrow b in FIG. 1, some other water in the water tank V is filtered after passing through the small stones 13 constituting the coarse filter medium in the bottom cover C ₂ , and then the flow port 15 and the small holes. It passes through 22 and enters the downstream chamber 33.

The filtered water that has merged in the downstream chamber 33 flows evenly from the entire surface of the activated carbon cartridge Cc into the activated carbon annular storage portion 38, where it passes through the activated carbon 35 to remove impurities contained therein. By removing it by adsorption, it is possible to reliably remove the turbidity and yellowing of water and to strongly deodorize unpleasant odors.

Thus, when operating this filtering device, the patented invention owned by the present applicant (Japanese Patent No. 1284943,
As in Japanese Patent Publication No. 60-7932), the water in the water tank V is divided into two systems and flows, one of which flows through the filter medium 26 having a relatively large water flow resistance and its flow velocity becomes relatively small. To promote the growth of aerobic microorganisms in the dense filter medium 26 (generally, when the flow velocity of the water flowing through the filter medium is high, the aerobic microorganisms are unlikely to propagate therein), the aerobic microorganisms adhere to the dense filter medium 26, It is possible to decompose accumulated organic matter such as residual food and feces to reduce the clogging, and use the aerobic microorganism as a live food for ornamental fish. On the other hand, the flow of the other water passes through the small stones 13 forming the coarse filter medium with a small resistance to reach the downstream chamber 33, and always exerts a water absorbing force on the downstream chamber 33, so that the dense filter medium 26 tends to be clogged. Even in this case, the flow of the one of the water flowing from the upstream chamber 32 to the downstream chamber 33 through the dense filter medium 26 is not interrupted, and a good filtering action can be continued for a long time.

It should be noted that the cartridge Cc can be used by being stored in the downstream chamber 33 without storing the cleaning agent therein. In this case, the filtered water flowing into the downstream chamber 33 is The air from the air pump Pa is atomized by evenly flowing in the downstream chamber, the water mixed well with the air is increased in velocity, and is guided by the inner cylinder 35i to rise straightly.
You can put it back inside.

Although one embodiment of the present invention has been described above, the present invention is not limited to this embodiment, and various embodiments are possible within the scope of the present invention. For example, in the above-mentioned embodiment, the case where the present invention is applied to the one in which water is divided into two systems and filtered is described, but it is needless to say that the present invention can be applied to one in which water is passed to one system and filtered. Further, in the above-mentioned embodiment, the filter medium is a plate-shaped one, but it may be an irregular one such as glass wool. In addition to the activated carbon, another purifying agent such as an ion exchange resin may be loaded in the cartridge. Thus, this ion exchange resin is used to convert hard water into soft water.

[0024]

As described above, according to the inventions of the claims, the purifying agent cartridge provided in the filtration case can adsorb impurities contained in the filtered water, and Turbidity and yellowing can be effectively removed, and unpleasant odors can be strongly deodorized. In particular, the filtered water can be forcibly and evenly distributed in the cleaning agent cartridge by using the air from the air pump, and the efficiency of adsorption of the cleaning agent can be significantly increased. Further, since the cartridge is housed in the filtration case and cannot be seen from the outside, the appearance is good and the cartridge does not spoil the appearance of the aquarium.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view of a filtration device.

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

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

FIG. 4 is a partially cutaway perspective view of a cleaning agent cartridge.

[Explanation of symbols]

2 ... Discharge port (upper water inlet) 3 ... Water inlet (upper water inlet) 26 ... Filter medium (dense filter medium) 32 ...・ ・ ・ ・ Upstream chamber (unclean room) 33 ・ ・ ・ ・ ・ ・ Downstream room (clean room) 35i ・ ・ Inner cylinder 35o ・ ・ ・ ・ ・ ・ Outer cylinder 38 ・ ・ ・ ・ ・ ・・ Circular storage 39 ・ ・ ・ ・ ・ ・ Cleaning agent (activated carbon) 40 ・ ・ ・ ・ ・ ・ Mesh 41 ・ ・ ・ ・ ・ ・ ・ Mesh C ・ ・ ・ ・ ・ ・ Filtration case Cc ・ ・ ・··· Purifying agent cartridge (activated carbon cartridge) Fu ··· Filtration chamber (upper filtration chamber) Pa ··· Air pump V ···· Water tank

Claims (3)

[Claims] 1. A cylindrical filter medium (26) is housed in a filter chamber (Fu) formed in a filter case (C) installed in a water tank (V), and the outside of the filter medium (26). The upstream chamber (32) communicating with the water inlet (3) and the filter medium (2
6) Inside the downstream chamber (33) communicating with the discharge port (2)
Respectively, and by supplying air from the air pump (Pa) to the downstream chamber (33), the water in the water tank (V) is passed through the filter medium (26) from the upstream chamber (32). A filtration device for an aquarium, which is configured to return to the inside of the water tank (V) through the downstream chamber (33) after filtration, wherein a purifying agent is provided in the downstream chamber (33) inside the cylindrical filter medium (26). The cartridge (Cc) is detachably accommodated,
The purifying agent cartridge (Cc) has inner and outer cylinders (35i, 3) in which meshes (40, 41) are formed on the entire circumference.
5o) is formed in a double cylinder shape, and the cleaning agent (39) is housed in the annular housing part (38) between them and the outer cylinders (35i, 35o). The filtered water that has passed through the) passes through the purifying agent (39) and the discharge port (2).
An aquarium filtration device characterized by being discharged to the outside. 2. The aquarium filtration device according to claim 1, wherein the purifying agent (39) is activated carbon. 3. The aquarium filtration device according to claim 1, wherein the purifying agent (39) is an ion exchange resin.