JPH11206268A - Diffuser for raising water tank and air diffusing member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject diffuser enabling air to be uniformly dispersed in water, hard to be clogged due to contaminants/dirts and/or microbial membranes, and enabling such foulings to be easily and thoroughly removed even in case such a clogging occures; and to obtain an air diffusing member used in the above diffuser. SOLUTION: This diffuser is made up of a pressurized air feeder, an air feed pipe, and an air diffusing member 4; wherein the air diffusing member 4 is such one that the outer circumferential surface of a ceramic circular rod 5 is provided with six grooves 6 and threaded detachably onto the inner circumferential surface on one end of the air feed pipe 3; portions of the respective grooves 6 threaded define air paths 7 between the portions and the inner circumferential surface of the air feed pipe 3 as the opposite surface and the respective open ends of the air paths 7 serve as air blow holes 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to ornamental fish, edible fish,
The present invention relates to an air diffuser for dispersing air as air bubbles in water for the purpose of supplying oxygen to the water and generating a water flow in a water tank for breeding living bodies such as aquatic plants, and an air diffusion member thereof.

[0002]

2. Description of the Related Art As shown in FIG. 24, a diffuser for a living breeding aquarium has a pressurized air supply device (not shown) and an air supply pipe 201 for sending air supplied from the pressurized air supply device.
And an air diffusion member 202 attached to the end of the air supply pipe 201. As the air diffusing member 202, a porous resin or ceramic air diffusing member having fine three-dimensionally intricate air gaps in its structure so that air can pass through, or a finer air gap is made of a wood structure A wooden air diffusing member provided as a conventional has been known.

When these air diffusion members 202 are mounted on an air supply pipe 201 and installed in a water tank, air supplied from a pressurized air supply device provided outside the water tank and sent through the air supply pipe 201 is used. For a while, fine air bubbles can be dispersed in water. Further, if the length of the air diffusion member 202 is changed, the flow rate of the water flow generated by the supply amount and dispersion of oxygen into the water can be increased or decreased, so that the capacity of the pressurized air supply device, the size of the water tank, and breeding It can be adapted to the living body.

[0004]

However, as described above, since the conventional air diffusion member 202 has a structure having fine voids, clogging due to waste such as bait, feces, and microbial membranes occurs. It is easy to occur, and the voids are three-dimensionally complicated not only on the surface but also inside, so after a certain period of time, clogging will not be resolved just by rubbing with a brush etc. There was a problem that foam dispersion could not be obtained.

[0005] Some of the air diffusion members made of ceramic can be restored to the original state by directly burning with a gas fire when clogged. However, the work of directly baking the air diffusion member by gas fire is tedious and requires attention, and is hardly performed in ordinary households.

Therefore, the conventional air diffusion member 202 has no other way but to replace the air diffusion member with a new air diffusion member when clogging occurs, which is expensive for the user, and has a problem in that the image of the disposable operation is poor. .

In addition, since the fine gaps in the conventional resin or ceramic air diffusion member 202 do not exist evenly in the entire member, or the size of the gap often varies in size, the member 202 Rather than air bubbles coming out of the entire void, air bubbles often come out of the voids in specific places, especially if clogging occurs,
There is also a problem that air bubbles are generated only from a few spaces. In addition, there were individual differences in the dispersed state between the products of the air diffusion member 202.

Further, as described above, in order to increase the water flow generated by the supply and dispersion of oxygen into water,
Even if the length of the air diffusion member 202 is adjusted long, if clogging occurs, the air is dispersed only from a specific number of places in the water, and after all, enough air is available for taking up space in the water tank. There was a problem that the dispersion could not be obtained and that the air diffusion members of each length had to be purchased in order to meet each purpose.

Therefore, an object of the present invention is to solve such problems, and to distribute air evenly from at least two jet ports without bias in the water. It is difficult to remove, even if it is clogged, it can easily and sufficiently remove attached dirt and microbial membranes, so that it can be used repeatedly rather than disposable, and by changing the number of grooves and the cross-sectional area, To provide an air diffusion device for a breeding aquarium and an air diffusion member for the breeding aquarium, which can adjust the supply amount of oxygen and the force of the water flow according to the capacity of the pressurized air supply device, the size of the aquarium, and the living body to be bred. is there.

[0010]

In order to achieve the above object, an air diffusion member for a breeding aquarium according to the present invention is characterized in that an air diffusion member mounted at an end of an air supply pipe has at least two air diffusion members.
An air passage is formed between the groove of the book and an opposing surface detachably mounted on the groove, and an opening end of the air passage is an air outlet. The following (1) and (2) can be exemplified as the air diffusion member.

(1) An air diffusion member in which the facing surface is an inner peripheral surface or an outer peripheral surface of an air supply pipe. The following two modes (a) and (b) can be exemplified as the air diffusion member.

(A) A mode in which a groove is provided on the outer peripheral surface of the rod body, and the outer peripheral surface is detachably inserted into the inner peripheral surface at the end of the air supply pipe. In this case, a through hole may be provided at the center of the rod. (B) A mode in which a groove is provided in the inner peripheral surface of the cup body, and the inner peripheral surface is detachably attached to the outer peripheral surface of the end of the air supply pipe. In this case, it is preferable to extend the groove to the inner bottom surface of the cup body.

The material of the air diffusion member (1) is not particularly limited, and examples thereof include ceramic, resin, rubber, and metal. The outer diameter (in case a) or the inner diameter (in case b) of the air diffusion member varies depending on the diameter of the air supply pipe, and fits so as not to come off when inserted or inserted into the air supply pipe. The diameter is preferably set. The length of the air diffusion member is not particularly limited, but is preferably about 5 to 100 mm, more preferably about 10 to 40 mm.

The number of grooves is at least two, which has the effect of dispersing air, but the upper limit is not limited, and the number can be increased as the diameter of the air supply pipe and the air diffusion member increases, but preferably from 3 to 20. Book, more preferably 4
10 to 10. There is no dispersion effect with one line, and it is difficult to increase the number more than 20 lines in terms of space. The plurality of grooves may be independent of each other, or may merge or cross midway. Cross-sectional area (width and depth) of the groove
Is not particularly limited. The cross-sectional shape of the groove is not particularly limited, and examples thereof include a semicircle, a U-shape, a V-shape, a rectangle, and a trapezoid. The shape of the groove in the length direction is not particularly limited, and examples thereof include a linear shape parallel to the length direction of the air diffusion member, a spiral shape inclined with respect to the direction, and the like.

(2) An air diffusion member in which at least two connecting members are detachably connected, and the groove and the opposing surface are provided relatively to one connecting member and the other connecting member to be connected. As the air diffusion member, the following two aspects (a)
(B) can be illustrated.

(A) The connecting body is provided with a thick cylindrical portion having a relatively large inner and outer diameter and a thin cylindrical portion having a relatively small inner and outer diameter via a step wall portion. An aspect in which both connecting bodies are detachably connected by fitting the outer peripheral surface of the thin cylindrical portion of the other connecting body to the inner peripheral surface of the part.

In the connection body (a), it is preferable that a gradient is formed between the inner peripheral surface of the thick cylindrical portion and the outer peripheral surface of the thin cylindrical portion so that the press-fitting works effectively. The gradient is not particularly limited, but is preferably 0.5 to 20 degrees, more preferably 1 to 10 degrees. Grooves are provided on the outer peripheral surface of the thin cylindrical portion and the outer surface of the step wall portion, and the inner peripheral surface and the end surface of the thick cylindrical portion can be opposed surfaces. Further, grooves may be provided on the inner peripheral surface and the end surface of the thick cylindrical portion, and the outer peripheral surface of the thin cylindrical portion and the outer surface of the step wall portion may be opposed surfaces.

(B) The connecting member has a conical cylindrical portion having a slope on the inner and outer peripheral surfaces, and the inner peripheral surface of the conical cylindrical portion of one connecting member is connected to the outer peripheral surface of the conical cylindrical portion of the other connecting member. An aspect in which both connecting bodies are detachably connected by fitting the surfaces.

[0019] In the connection body of (b), a groove is provided on the outer peripheral surface of the conical cylindrical portion, and the inner peripheral surface of the conical cylindrical portion can be an opposing surface. Also, a groove may be provided on the inner peripheral surface of the conical tube portion, and the outer peripheral surface of the conical tube portion may be the opposing surface.

In the air diffusing member (2), the material of the connecting member is not particularly limited, and examples thereof include ceramic, resin, rubber, and metal. The number of connected bodies is not particularly limited, but is preferably 2 to 20, and more preferably 3 to 10 in consideration of the size of the water tank.

The number of grooves is at least two, which has the effect of dispersing air, but the upper limit is not limited, and the number of grooves can be increased as the diameter of the connecting body increases, but preferably from 3 to 6
The number is four, more preferably 4 to 24. There is no dispersion effect with one, and it is difficult to increase the number to more than 64 in terms of space. The plurality of grooves may be independent of each other, or may merge or cross midway. The cross-sectional area (width and depth) of the groove is not particularly limited. The cross-sectional shape of the groove is not particularly limited, and examples thereof include a semicircle, a U-shape, a V-shape, a rectangle, and a trapezoid. The shape of the groove in the length direction is not particularly limited, and examples thereof include a linear shape parallel to the length direction of the connecting body and a linear shape inclined with respect to the same direction.

The following means (a), (b) and (c) are preferably adopted in order to prevent the air bubbles ejected from the adjacent ejection ports from moving in the lateral direction and uniting and becoming larger.

(A) The ejection port has a polygonal shape. Air bubbles ejected from the ejection port become smaller. In particular, a polygon having a vertex at the upper center is preferable. An air bubble comes to rise directly from the top. Examples of the polygon include a triangle and a pentagon.

(B) An air bubble guiding ridge or a groove for vertically extending air bubbles is provided on the outer peripheral surface of the connecting member located immediately above the jet port. The term “directly above” includes both immediately above and immediately above a side that is slightly shifted. The air bubbles spouted from the spout come into contact with the air bubble guide ridges or the air bubble guide grooves and float directly above while being guided.

(C) At least the outer peripheral surface of the connected body is formed to have a smooth glossy surface. Since the contact resistance when the air bubbles float is reduced, the air bubbles ejected from the ejection port easily float right above. When the connecting body is formed of a resin, the resin is preferably a resin (for example, a polyacetal resin) from which a glossy surface is easily obtained by molding.

In order to allow the air diffusion member to be submerged under its own weight, it is preferable to take the following measures. All or a part of at least two connected bodies are formed of a material having a specific gravity of 2 or more. The specific gravity is more preferably 3 or more. All or a part of at least two linked bodies have embedded weights.

In the case where the air diffusion member is used by being inserted into the cylinder, the air diffusion member is brought into contact with the outer peripheral surface of the connecting body and the inner peripheral surface of the cylinder so that the air diffusion member is at the center of the cylinder. Preferably, at least two projections are provided to support the part.
More preferably, three or more projections are provided.

Further, the air diffuser for a breeding aquarium of the present invention comprises a pressurized air supply device, an air supply pipe for sending air supplied from the pressurized air supply device, and an end mounted to the air supply pipe. In a breeding aquarium air diffuser comprising an air diffusion member to be provided, the air diffusion member forms an air passage between at least two grooves and an opposing surface that removably covers the grooves,
The opening end of the air passage is an air outlet.

This breeding aquarium air diffuser can also be combined with the filtration device so that it can be used as a power source of water flow for the filtration device. Examples of the filtration device include a submersion type filtration device and an underwater bottom type filtration device.

In the above invention, the pressurized air supply device comprises:
The structure is not limited to a specific structure, and a general air pump can be exemplified.

The air supply pipe is not particularly limited, and is a flexible bendable pipe such as a silicone resin tube or a soft vinyl chloride resin tube, or an inflexible pipe such as an acrylic resin pipe or a hard vinyl chloride resin pipe. Can be exemplified, and each can be used alone or in appropriate combination depending on the condition of the setting.

[0032]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, FIGS. 1 to 9 show a first embodiment of a diffuser 1 for a breeding aquarium according to the present invention, and FIGS. 7 shows an example of use I
8 and 9 show a use example III thereof, respectively.

As shown in FIGS. 1 to 3, the air diffuser 1 for a breeding aquarium according to the first embodiment includes a pressurized air supply device 2 and a feeder for sending air supplied from the pressurized air supply device 2. It comprises an air pipe 3 and an air diffusion member 4 attached to an end of the air pipe 3. A commercially available air pump is used for the pressurized air supply device 2, and a commercially available flexible silicone resin tube is used for the air supply pipe 3. The inside diameter of the air supply pipe 3 is 3 mm (or 4 mm).

The air diffusion member 4 has a length of 10 to 40 mm,
An outer diameter of about 4.5 mm (or about 5.5 mm) is formed of six grooves 6 on an outer peripheral surface of a ceramic round bar body 5. It is designed to be detachably inserted into the surface. The outer diameter of the air diffusion member 4 is about 1.5 mm larger than the inner diameter of the air supply pipe 3 and is tightened by the air supply pipe 3 which has been elastically expanded at the time of insertion, so that the air diffusion member 4 does not come off easily after insertion (pulling strongly. Exit).
In this example, the air supply pipe 3 extends to the middle of the air diffusion member 4.
And the remaining part of the air diffusion member 4 is used so as to protrude from the air supply pipe 3. An air passage 7 is formed between the inserted groove 6 and the inner peripheral surface of the air supply pipe 3 as an opposing surface that removably covers the groove 6. The open end of the road 7 is an air outlet 8. The cross-sectional shape of each groove 6 is, for example, substantially semicircular, and the shape in the length direction of each groove 6 is a straight line parallel to the length direction of the air diffusion member 4.

The air diffusion member 4 made of ceramic of this embodiment is
It is manufactured by extruding porcelain clay by an extruder (not shown), cutting the porcelain clay into an appropriate length, and baking it in a gas oven at about 1300 ° C. The groove 6 is formed by attaching a mold opening such that the groove 6 is formed at the extrusion opening of the extruder. In addition, it is not limited to the extrusion molding method, but can also be manufactured by a mold molding or the like.

In order to assemble the breeding aquarium diffuser 1 constructed as described above, the air diffusion member 4 is inserted into one end of the air supply pipe 3 and the other end of the air supply pipe 3 is compressed air. It only needs to be connected to the supply device 2.

The use example I shown in FIGS. 1 to 3 is an example in which the above-described aeration device 1 for a breeding aquarium is used exclusively for aeration for the purpose of supplying oxygen to a living body. To use it this way,
It is only necessary to install the pressurized air supply device 2 outside the water tank 10, put the air supply pipe 3 and the air diffusion member 4 into the water 11 in the water tank 10, and operate the pressurized air supply device 2. In order to stabilize the position of the air diffusion member 4, that is, the place of air diffusion, in the water tank 10, it is preferable that a part of the air supply pipe 3 be fixed to the inner wall surface of the water tank 10 with a suction cup 12 or the like.

The air supplied from the pressurized air supply device 2 is sent through the air supply pipe 3, passes through the six air passages 7, and flows out of the jets 8 into the water 11 as air bubbles 13 through the six air passages 7. Spouted and dispersed. The air passage 7 formed between the groove 6 and the inner peripheral surface of the air supply pipe 3 as an opposing surface that removably covers the groove 6 is three-dimensionally complicated as in the related art. Since the passage is not a fine gap but a simple one- or two-dimensional passage, the following operations and effects (1) to (4) can be obtained.

(1) The cross-sectional shape, cross-sectional area (width and depth), etc. of each groove 6 can be formed uniformly. For this reason, the air bubbles 13 are evenly distributed from the ejection ports 8 of the entire air passage 7 uniformly and uniformly with a relatively uniform bubble diameter without being biased to some of the gaps as in the prior art. Can be spouted and dispersed inside. Further, between products of the air diffusion member 4,
Individual differences in the dispersion state can be eliminated. In addition, each groove 6
The cross-sectional shape, cross-sectional area, and the like of the gasket can be formed arbitrarily non-uniformly. In this case, the bubble diameter can be changed.

(2) Clogging of the air passage 7 due to residual foods, feces and other filth, microbial membranes and the like is unlikely to occur, and the clogging does not easily reduce the dispersion of the air bubbles 13.

(3) Even if the air passage 7 is clogged, if the air diffusing member 4 is pulled out from the air supply pipe 3, the surface facing the groove 6 is lost and the groove 6 is opened. By simply rubbing lightly, dirt and microbial membranes adhered to the groove 6 can be easily and sufficiently removed, and the function is fully restored. Therefore, the air diffusion member 4 can be used many times rather than being disposable.

(4) By changing the number and the cross-sectional area of the grooves 6, the supply amount of oxygen and the momentum of the water flow can be increased or decreased according to the capacity of the pressurized air supply device 2, the size of the water tank 10, and the living body to be bred. Can be adjusted.

The use example II shown in FIG. 4 to FIG. 7 is assembled with the underwater-input type filtration device 20 so that the breeding-tank aeration device 1 can be used as a water flow generation power source of the underwater-input type filtration device 20. This is a combined example. In this example, the aeration device 1 for breeding aquarium is partially modified and used. That is,
An air diffusion member 4 having one through hole 9 at the center of the round bar body 5 is used, and a silicone resin-based elastic short pipe 28 is provided at the lower end of the air diffusion member 4 protruding from the air supply pipe 3. Extrapolate.

The underwater filtration device 20 includes a ceramic upper opening container 21, a pedestal 22 provided at the bottom center of the container 21, and a detachable attachment to the pedestal 22 via a sleeve-like elastic member 23, for example. It consists of a ceramic cylinder 24 which can be freely mounted. The pedestal 22 includes a short tubular portion 30 and a plurality of radial rib-shaped tubular support portions 3 provided on the outer periphery thereof.
The cylindrical support portion 31 is formed in an L-shape from a fitting piece into which the cylindrical body 24 is fitted and a support piece that receives the cylindrical body 24. When the cylindrical body 24 is fitted and mounted on the pedestal 22,
A plurality of water passages 32 formed between the cylinder support portions 31 and the cylinder 24 serve as paths for the water 11.

The space formed between the cylindrical body 24 and the inner wall of the container 21 is a filtration chamber 25, in which a filtering material 26 made of porous ceramic and a sponge-like filtering material 27 thereon are provided. Is provided. The air supply pipe 3 is inserted into the cylindrical body 24, the upper end of the air diffusion member 4 is inserted into one end of the air supply pipe 3, and the lower end of the air diffusion member 4 is connected to the elastic short pipe 28. Blind hole 29 of pedestal 22 through
Is inserted and fixed. A gap 33 is provided between the lower end surface of the air diffusion member 4 and the inner bottom surface of the blind hole portion 29. The lower end of the air diffusion member 4 and the elastic short pipe 28
And an air passage 34 is formed between the air passages 3 and 3.
The open end of 4 serves as an air outlet 35.

The assembling of the breeding aquarium aeration device 1 and the underwater filtration device 20 of the present embodiment is performed as follows. However, the following procedure is an example and can be changed as appropriate. The upper end of the air diffusion member 4 is inserted into one end of the air supply pipe 3. The elastic short pipe 28 is extrapolated to the lower end of the air diffusion member 4. An elastic member 23 is mounted around the pedestal 22. The lower end of the air diffusion member 4 is inserted into the blind hole 29 of the pedestal 22 together with the elastic short pipe 28. The cylinder 24 is inserted into the pedestal 22. At this time, the cylinder 2
4 so that the air supply pipe 3 passes through it. A filtration material 26 made of porous ceramic is put in a filtration chamber 25 formed between the cylindrical body 24 and the inner wall of the container 21,
A sponge-like filter material 27 is provided on the upper portion of the filter material 26. The other end of the air supply pipe 3 is connected to the pressurized air supply device 2 installed outside the water tank 10.

According to the breeding aquarium aeration device 1 and the submersion type filtration device 20 of the present embodiment, the air supplied from the pressurized air supply device 2 is sent through the air supply pipe 3, Through the air passages 7, the air bubbles 13 are jetted and dispersed into the water 11 as air bubbles 13, and after passing through the through-holes 9 and the gaps 33, each air jet 13 passes through the six air passages 34. Air bubbles 13 are also ejected and dispersed into the water 11 from the outlet 35. The dispersed air bubbles 13 rise in the cylinder 24,
It is jetted into the water tank 10 from the upper opening of the cylindrical body 24. The water 11 in the cylindrical body 24 is also discharged from the upper opening by the movement of the air bubbles 13. In addition, with this discharge, the filter medium 2
The water 11 in the filtration chamber 25 formed between the inner wall of the container 21 provided with 6, 27 is also discharged from the upper opening through the water passage 32 formed in the pedestal 22. By this movement, the water 11 in the water tank 10 enters through the upper opening of the container 21 and is filtered by passing through a sponge-like filter material 27 and a ceramic filter material 26 provided in the filtration chamber 25, It is discharged from the upper opening of the cylindrical body 24 through the water passage 32 of the pedestal 22.

The use example III shown in FIGS. 8 and 9 is a combination with the underwater bottom-side filtration device 40 so that the above-mentioned aeration device 1 for breeding aquarium can be used as a power source for generating water flow of the underwater bottom-surface filtration device 40. This is a combined example.

The underwater bottom filtration device 40 is a thin box 41 having a slit (not shown) formed at the top and having no bottom.
And a cylindrical pipe 42 having a lower end inserted into one portion of the box 41 and an L-shaped pipe 43 connected to the upper end of the cylindrical pipe 42. The air supply pipe 3 is passed through a hole 44 provided in the upper part of the L-shaped pipe 43 so that the air supply pipe 3 is fitted without a gap.
The other end of the pressurized air supply device 2 installed outside the water tank 10
Connect to and use. The air diffusion member 4 is inserted into one end of the air supply pipe 3 in the cylindrical pipe 42.

The assembling of the breeding tank aeration device 1 and the underwater bottom type filtration device 40 of this embodiment is performed as follows. However, the following procedure is an example and can be changed as appropriate. A thin box 41 is placed in the water 11. The air supply pipe 3 is inserted into the hole 44 of the L-shaped pipe 43, and the air diffusion member 4 is inserted into one end of the air supply pipe 3. The cylindrical pipe 42 is fitted to the L-shaped pipe 43. At this time, the air supply pipe 3 is set in the cylindrical pipe 42. The other end of the air supply pipe 3 is connected to the pressurized air supply device 2 installed outside the water tank 10. The sand 45 is spread over the entire bottom of the water tank 10 so as to cover the box 41.

According to the breeding aquarium aeration device 1 and the underwater bottom filtration device 40 of the present embodiment, the air supplied from the pressurized air supply device 2 is sent through the air supply pipe 3 and the air is diffused. Air bubbles 13 are blown out from the air passage 7 of the member 4. The air bubbles 13 rise in the cylindrical pipe 42 and
It squirts into the water 11 in the water tank 10 from the character pipe 43.
The water 11 in the cylindrical pipe 42 is also discharged from the L-shaped pipe 43 by the movement of the air bubbles 13. Further, with the discharge of the water 11, the water 11 in the water tank 10 is sucked from an upper slit (not shown) of the thin box 41 installed at the bottom of the water tank 10 and flows to the cylindrical pipe 42. At this time, the water 11 is filtered by passing through the sand 45 laid on the thin box 41.

Next, FIGS. 10 to 12 show a second embodiment of an air diffuser for a breeding aquarium according to the present invention. This air diffuser for breeding aquariums differs from the first embodiment only in the structure of the air diffusion member 50, and any of the usage examples I, II and III is possible.

The air diffusion member 50 has a length of 10 to 40.
mm, an inner diameter of about 2.5 mm or about 3.5 mm, eight grooves 52 are provided on an inner peripheral surface of a ceramic cup body 51, and the outer peripheral surface is formed on an outer peripheral surface of one end of the air supply pipe 3. It is designed to be extrapolated detachably. The inside diameter of the air diffusion member 4 is larger than the inside diameter of the air supply pipe 3 by about 0.5 mm, and the air diffusion member 4 is tightened to the outer periphery by the air supply pipe 3 which has been elastically reduced during insertion. Through). Each groove 52 extends to the inner bottom surface of the cup body 51 and intersects and merges at the center of the inner bottom surface. Each groove 52 forms an air passage 53 between the groove 52 and the outer peripheral surface of the air supply pipe 3, and the opening end of the air passage 53 serves as an air outlet 54.

According to the air diffusion member 50 of the present embodiment, the air sent through the air supply pipe 3 once exits the air supply pipe 3, passes through the inner bottom surface of the cup body 51, and passes through each air passageway. 5
3 are jetted out as air bubbles from the jet ports 54 and dispersed in water. And each air passage 53 formed between each groove 52 and the inner peripheral surface of the air supply pipe 3 is not a three-dimensionally complicated intricate gap as in the related art, but a one- or two-dimensional. Therefore, the same operations and effects (1) to (4) as in the first embodiment can be obtained.

Next, FIGS. 13 to 21 show a third embodiment of an air diffuser for a breeding aquarium according to the present invention. This breeding aquarium aeration device differs from the first embodiment only in the structure of the air diffusion member 60, and any of the above-described usage examples I, II, and III can be used. FIGS. 17 to 21 show modified examples of the underwater charging type filtration device 20 used in the usage example II.

This air diffusing member 60 is shown in FIGS.
, In order from the upper side (the base end side connected to the air supply pipe) to the lower side (the front end side), one base end connection body 61, two intermediate connection bodies 62, 62, and one front end side connection Body 63
The three types, a total of four connected bodies, are connected and assembled. Each of the connecting bodies 61, 62, 62, and 63 is injection-molded with a polyacetal resin, and the outer peripheral surface is particularly formed with a smooth glossy surface.

The base-side connecting member 61 has a pipe-like connecting portion 6.
4, a thin tube portion 66, and a step wall portion 65 protruding outward from the upper end of the thin tube portion 66 are integrally formed. When connecting the air supply pipe 3 having an inner diameter of 4 mm, the outer diameter of the connecting portion 64 is 5 m.
m, the inner diameter is 3 mm. An annular protrusion 67 is formed on the outer periphery of the connection portion 64, and cuts into the inner periphery of the air supply pipe 3 to achieve airtightness. The length of the thin tube portion 66 is 4.5
mm, and the inner diameter of the air passage 68 penetrating the center thereof is 6 mm. On the outer peripheral surface of the thin cylindrical portion 66, 3
Degrees, and the outer diameter is 1 mm at 1 mm from the upper end.
0 mm. On the outer peripheral surface of the thin cylindrical portion 66 and the lower surface of the step wall portion 65, 12 outer peripheral surfaces of the thin cylindrical portion 66 extend vertically from the lower end to the upper end, and the lower surface of the step wall portion 65 radially extends from the inner edge to the outer edge. Are formed at equal intervals. The groove 69 has a V-shape with the groove bottom at the top and the interior angle at 60 degrees, and the depth to the groove bottom is 0.5 mm.

Each of the intermediate connecting members 62 includes a thick cylindrical portion 70 having a relatively large inner and outer diameter and a thin cylindrical portion 6 having a relatively small inner and outer diameter.
6 are integrally formed so as to be continuous via the step wall portion 65. The length of the thick cylinder 70 is 7.5 mm,
The depth of the hollow portion 71 (the depth up to the upper surface (inner surface) of the step wall portion 65) is 5.5 mm. The inner peripheral surface of the thick cylindrical portion 70 is provided with a gradient of 3 degrees so that the diameter decreases toward the lower end, and the inner diameter is 10 mm at the upper end. The outer peripheral surface of the thick cylindrical portion 70 is provided with a gradient of 3 degrees so that the diameter decreases toward the lower end, and the outer diameter is 13 at the upper end.
mm. The thin tube portion 66 is the same as the thin tube portion 66 of the proximal connector 61, the air passage 68 is formed similarly, and the outer peripheral surface of the thin tube portion 66 and the lower surface (outer surface) of the step wall portion 65. Are similarly formed with twelve grooves 69. On the outer peripheral surface of the thick cylindrical portion 70, twelve air bubble guide projections 73 having a circular arc cross section are formed at right intervals above each groove 69 and extend vertically.

The distal end side connecting body 63 is formed by integrally molding a thick cylindrical portion 74, a bottom wall portion 77, and four radial projections 75. The depth of the hollow portion 76 in the thick cylindrical portion 74 is 5.5.
mm, and a recess 78 is formed at the center of the upper surface of the bottom wall surface 77. The inner peripheral surface of the thick cylindrical portion 74 is provided with a gradient of 3 degrees so that the diameter decreases toward the lower end, and the inner diameter is 10 mm at the upper end. The number of the protrusions 75 may be at least two, but is preferably three or more.

Then, the outer peripheral surface of the thin cylindrical portion 66 of the base end side connecting member 61 is fitted into the inner peripheral surface of the thick cylindrical portion 70 of the upper intermediate connecting member 62, so that the two connecting members 61, 62 are connected. It is detachably connected, and the outer peripheral surface of the thin cylindrical portion 66 of the intermediate connecting member 62 is fitted into the inner peripheral surface of the thick cylindrical portion 70 of the lower intermediate connecting member 62, so that the two connecting members 62, 62 are detachably connected to each other, and the outer peripheral surface of the thin cylindrical portion 66 of the intermediate connecting member 62 is fitted into the inner peripheral surface of the thick cylindrical portion 74 of the distal end connecting member 63, so that the two connecting members 62, 63 are connected. Are detachably connected.

At the time of these fittings, when a portion 3.5 mm from the lower end of the thin cylindrical portion 66 is fitted into the thick cylindrical portions 70 and 74, the sloped outer diameter of the thin cylindrical portion 66 and the thick cylindrical portion are reduced. 70,
74 and the inner diameter of the narrow tube portion 6
6 and the inner peripheral surfaces of the thick cylindrical portions 70 and 74 are in contact with each other.
Further, the remaining 1 mm of the thin cylindrical portion 66 is the thick cylindrical portion 70, 74.
When it is firmly fitted (press-fitted), the lower surface of the step wall portion 65 comes into contact with the upper end surfaces of the thick cylindrical portions 70 and 74 and stops. Then, an air passage 79 having a triangular cross section is formed between the thin cylindrical portion 66 and the groove 69 of the step wall portion 65 and the inner peripheral surfaces and the upper end surfaces of the thick cylindrical portions 70 and 74 as detachable opposing surfaces. At the opening end of the air passage 79, a triangular jet port 80 having a vertex at the upper center is formed. 1 mm between the lower end surface of the thin cylindrical portion 66 and the upper surface of the step wall portion 65 or the bottom wall portion 77.
Gap 81 can be formed in an annular shape, and the lower end of each groove 69 communicates with the gap 81.

The connecting portion 64 of the air diffusion member 60 assembled as described above is removably inserted into the inner peripheral surface of one end of the air supply pipe 3, and the other end of the air supply pipe 3 is shown in FIG. If connected to the pressurized air supply device 2 of the first embodiment shown,
The breeding aquarium air diffuser of this embodiment is configured.

The usage example I of this embodiment is one in which the air diffusion member 4 of the first embodiment shown in FIG. 1 is replaced by an air diffusion member 60 of this embodiment (not shown). Except for the flow of, it is common to the first embodiment.

The air supplied from the pressurized air supply device 2 is sent through the air supply pipe 3, enters the air passages 68 of the connectors 61, 62, 62 from the connection portion 64, and is connected to the distal end side connector Each of the ventilation passages 68 is stopped by the bottom wall 77 of the air passage 63.
From each of the gaps 81, and is ejected and dispersed into the water 11 as air bubbles 13 from each ejection port 80 through an air passage 79 formed by each groove 69 and its opposing surface. The air passage 79 formed between the groove 69 and the opposing surface which is detachably mounted on the groove 69 is not one-dimensional or one-dimensional and simple, rather than a complicated three-dimensionally complicated small gap as in the related art. Because the passage is a passage, the same operation and effect (1) to the first embodiment are performed.
(4) is obtained. Further, according to the present embodiment, the following operations and effects (5) to (10) are also obtained.

(5) Each connecting member 6 is pressed by the press-fitting between the outer peripheral surface of the narrow cylindrical portion 66 and the inner peripheral surfaces of the thick cylindrical portions 70 and 74 by press-fitting.
Since 1, 62, 62 and 63 are detachably connected, the connection can be performed quickly and easily with one touch.

(6) Since the ejection port 80 is triangular, the air bubbles 13 ejected from the ejection port 80 are smaller than in the case of a semicircle, for example. Further, as shown in FIG. 16, when the air bubbles 13 are ejected from the ejection port 80, the air bubbles 13 are regulated by the both sides of the ejection port 80, and thus float right above as shown in FIG. 16. For this reason, the adjacent spout 80
It is unlikely that the air bubbles 13 ejected from each other move in the horizontal direction and coalesce and become large, the fine air bubbles 13 can be floated, and the efficiency of oxygen supply and water flow generation is good.

(7) Since the air bubble guide ridge 73 is formed on the outer peripheral surface of the thick cylindrical portion 70 located immediately above the jet port 80, the air jetted from the jet port 80 as shown in FIG. The bubbles 13 float right above while being guided by contacting the air bubble guide ridges 73. For this reason, the air bubbles 13 ejected from the adjacent ejection ports 80 are less likely to move in the horizontal direction during floating and coalesce and become large, so that the efficiency of oxygen supply and generation of a water flow is also good.

(8) Since the outer peripheral surface of the thick cylindrical portion 70 of the intermediate portion connecting body 62 is formed to have a smooth glossy surface (including the surface of the air bubble guide ridge 73), the air bubbles 13 float. When the contact resistance is small. For this reason, the adjacent spout 80
It is unlikely that the air bubbles 13 ejected from each other move in the lateral direction due to contact resistance and coalesce and become large, and the efficiency of oxygen supply and generation of water flow is also good. In addition, the polyacetal resin not only easily obtains a glossy surface by injection molding, but also has excellent wear resistance, dimensional stability, organic chemical resistance, and the like.

(9) The number of the ejection ports 80 can be greatly increased or decreased by reducing the number of the intermediate connecting members 62 to be connected to zero or one, or increasing the number to three or more. Therefore, the operation and effect (4) can be further enhanced. In addition, it is preferable that the cross-sectional area of the ventilation path 68, the gap 81, or the groove 69 be larger in the connecting body on the front end side so that the air flow rate on the front end side (the lower end in FIG. 13 and the like) is not reduced by the flow resistance.

(10) All or some of the connected bodies 61 and 6
By making the weights 2, 62, 63 into which the weight is buried, or the connecting body itself made of a material having a specific gravity of 2 or more (metal such as stainless steel, ceramics, etc.), the air diffusion member 60 can be made to have water by its own weight. The need to attach a separate weight to the outside to sink is eliminated.

FIGS. 4 and 5 show a usage example II of this embodiment.
May be replaced with the air diffusion member 60 of the present embodiment (not shown), or the underwater charging type filtration device of the modified example shown in FIGS. 90 may be combined.

The underwater filtration device 90 is detachably attached to a glass container 91, a stand 92 formed in an umbrella shape with resin and placed on the bottom center of the container 91, and a central cylindrical portion 93 of the stand 92. A cylindrical body 94 attached to the container 91; a cylindrical body supporting member 95 that supports the cylindrical body 94 at the center of the mouth of the container 91 to prevent rattling; and a detachable through the packing 96 at the mouth of the container 91. A cover 97 screwed on, a packing 99 for sealing between the lower end of the center tube 98 of the cover 97 and the tube support member 95, and an upright tube 100 detachably screwed to the center tube 98. And an extension tube 101 detachably connected to the upper end of the upright tube 100.

The stand 92 is provided with an umbrella shape to raise the bottom to provide a path for the water 11 thereunder.
As shown in FIG. 20, the outer peripheral edge is not cut out.
The two slits 102 and the eight slits 103 cut out to the outer peripheral edge are formed alternately at a ratio of two to one. Each of the slits 102 and 103 serves as a path for the water 11, and the slit 103 allows the stand 92 to have elastic deformation in the vertical direction (in this example, expansion and contraction is accompanied). The number of slits 102 is not particularly limited, and may be replaced with a through hole or the like. The number of slits 103
Although not particularly limited, 2 to 32 are preferable, and 3 to 8 are more preferable. If one is used, the elastic deformation is insufficient and the shape becomes asymmetric. If the number is more than 32, the strength of the stand 92 tends to decrease. The glass container 91 may vary by several mm in the height direction due to a manufacturing error.
The stand 92 and the tubular body 94 may be compressed more than designed when the screw is screwed. At this time, when the width of the slit 103 is increased, the stand 92 is elastically deformed as described above, so that the variation can be absorbed. The stand 92 may have elasticity in the vertical direction by various structures other than the slit 103.

As shown in FIG. 21, the cylindrical support member 95 is provided with a cylindrical portion 109 through which the cylindrical member 94 passes, and is arranged radially on the outer periphery of the cylindrical portion 109 to abut on the inner peripheral surface of the mouth of the container 91. The three protrusions 110 are integrally formed of resin. Tube part 1
09 is provided at the upper end of the fitting groove 11 for fitting the packing 99.
2 are formed. The protruding portion 110 is formed in a loop having a substantially ginkgo leaf shape in a plane, and its curved side surface portion 11 is formed.
1 has elastic deformation in the expansion and contraction directions. The glass container 91 may vary in the inner diameter of the mouth by about 0.5 to several mm due to manufacturing errors, but this variation can be absorbed by the elastic deformation of the projection 110. In addition, the protrusion 110 may have elastic deformation in the expansion and contraction directions by various structures other than the loop. The number of the protrusions 110 may be at least two, but is preferably three or more.

The space formed between the cylindrical body 94 and the inner wall of the container 91 is a filtration chamber 25, in which a filtering material 26 made of porous ceramic is provided. Also, the lid 9
7, a sponge-like filtering material 27
Is mounted, and a top cover 1 for stopping the filter medium 27 is provided.
Reference numeral 06 is attached to the lid 97 via the ring 105. The air supply pipe 3 is inserted into the cylinder 94, and a pipe support member 107 for supporting the air supply pipe 3 at the center of the cylinder 94 and preventing rattling is interposed in the middle of the air supply pipe 3. Have been. The pipe support member 107 is provided for the air supply pipe 3.
And four protruding plate portions 114 radially arranged on the outer periphery of the short pipe 113 and in contact with the inner peripheral surface of the cylindrical body 94 are integrally formed of resin. Veneer part 1
The number of 14 may be at least two, but is preferably three or more.

The air diffusion member 60 is attached to one end of the air supply pipe 3. The tip of the projection 75 contacts the inner peripheral surface of the cylinder 94, and supports the air diffusion member 60 at the center of the cylinder 94 to prevent rattling. At the upper end of the extension tube 101, an air bubble guide 108 for discharging the air bubbles 13 to the side is attached to the air supply pipe 3.

Even when using the underwater filtration device 90 of this modification, the underwater filtration device 20 of the first embodiment can be used.
Basically, the same operation and effect as in the case of using are obtained.

A usage example III of the present embodiment is one in which the air diffusion member 4 of the first embodiment shown in FIGS. 8 and 9 is replaced with an air diffusion member 60 of the present embodiment (not shown). The same operation and effect as in the embodiment can be obtained.

Next, FIG. 22 and FIG. 23 show a fourth embodiment of an air diffuser for a breeding aquarium according to the present invention.
This aeration device for a breeding aquarium differs from the third embodiment only in the structure of the air diffusion member 120, and the use example I and use example II (including the case where the underwater filtration device 90 is used) and use. Any of the uses of Example III are possible.

This air diffusing member 120 is arranged in order from top to bottom in FIG. 22 and FIG.
One, two intermediate part connecting bodies 122, and one distal end side connecting body 123, which are assembled by connecting three kinds of connecting bodies (however, substantially two kinds as will be described later), that is, a total of three connecting bodies. is there. Each of the connecting bodies 121, 122, and 123 is injection-molded with a polyacetal resin, and the outer peripheral surface is particularly formed to have a smooth glossy surface.

The base end side connecting body 121 is formed by integrally forming a pipe-shaped connecting portion 124 and a conical cylindrical portion 125 having a gradient of 15 degrees on the outer peripheral surface so as to reduce the diameter toward the lower end.
An annular protrusion 126 is formed on the outer periphery of the connection portion 124. The inner peripheral surface of the conical tube portion 125 is a ventilation passage 127 that penetrates straight. Twelve V-shaped grooves 128 extending from the lower end to the upper end of the outer peripheral surface of the conical cylindrical portion 125
Are formed at equal intervals.

Each intermediate portion connecting body 122 has a conical cylindrical portion 1 having a 15-degree gradient on the inner and outer peripheral surfaces so that the diameter decreases toward the lower end.
Consists of 29. However, the lower part of the inner peripheral surface has no slope and the inner flange 130 is formed, and the lower part is an air passage 127 penetrating straight. Conical tube part 12
9 has 12 V extending from its lower end to its upper end.
The letter-shaped grooves 128 are formed at equal intervals.

The distal connector 123 is the same as the intermediate connector 122 except that a weight 131 made of lead or the like is fitted and closed in the air passage 127. Therefore,
In the air diffusion member 120 of the present embodiment, it is sufficient to substantially form two types of connected bodies, and the cost of the mold can be reduced.

Then, the conical cylindrical portion 1 of the base end side connecting body 121
The lower part of the outer peripheral surface of the conical cylindrical portion
9 are fitted (press-fitted) into the inner peripheral surface of the intermediate member 122 so that the two connecting members 121 and 122 are detachably connected, and the lower part of the outer peripheral surface of the conical cylindrical portion 129 of the intermediate connecting member 122 is connected to the distal end side connecting member 1.
The two connecting bodies 122 and 123 are detachably connected by being fitted (press-fitted) into the inner peripheral surface of the 23 conical cylindrical portion 129.

When the fitting (press-fitting) is carried out as described above, a cross section is formed between the groove 128 on the outer peripheral surface of the conical cylindrical portion 125, 129 and the inner peripheral surface of the conical cylindrical portion 129 as an opposing surface which is detachably mounted thereon. A triangular air passage 132 is formed, and a triangular outlet 133 is formed at an open end of the air passage 132. A 1 mm gap 134 is formed between the lower end surfaces of the conical cylindrical portions 125 and 129 and the upper surface of the inner flange 130, and the lower end of each groove 128 communicates with the gap 134.

According to the air diffusing member 120 of this embodiment, air flows from the connecting portion 124 to each of the air passages 1 of the connecting bodies 121 and 122.
27, and is stopped by the weight 131 of the distal end side linking body 123. Therefore, the air enters each gap 134 from each air passage 127, passes through the air passage 132 formed by each groove 128 and its opposing surface, and flows out from each jet port 133. Spouted and dispersed in water as foam. The groove 128 above the jet port 133 functions as an air bubble guide groove. Therefore, according to this embodiment, the same operations and effects (1) to (10) as those of the third embodiment can be obtained.

The present invention is not limited to the above-described embodiment, and can be embodied by appropriately changing the scope of the invention as follows, for example, as follows. (A) The air diffusion member 4 provided with the through-hole 9 used in the usage example II is used in the usage example I or III, and air bubbles are also ejected from the ejection port at the tip of the through-hole 9. (B) The number of the through holes 9 is at least two, preferably two to seven, and the number of the ejection ports is increased. (C) The method of using the air diffuser for breeding aquariums is described in Use Examples II to I
It is not limited to II, and can be used in any method by combining other devices.

(D) In the third embodiment, the thick cylindrical portion 7
Grooves 69 are formed on the inner peripheral surface and the upper end surface of 0, 74, and the outer peripheral surface of the thin cylindrical portion 66 and the lower surface of the step wall portion 65 are opposed surfaces. (E) In the fourth embodiment, a groove 128 is formed on the inner peripheral surface of the conical cylindrical portion 125, and the outer peripheral surface of the conical cylindrical portion 125 is an opposing surface.

[0089]

The air diffuser for breeding aquariums and the air diffusion member thereof according to the present invention are constructed as described above, so that air can be evenly dispersed in water from at least two jet ports without bias. It is difficult for clogging due to dirt and microbial membranes to occur, and even if clogged, the adhered dirt and microbial membranes can be easily and sufficiently removed. By changing the number and cross-sectional area of, the supply amount of oxygen and the momentum of the water flow can be adjusted to increase or decrease according to the capacity of the pressurized air supply device, the size of the water tank, and the living body to be bred.
It has an excellent effect.

[Brief description of the drawings]

FIG. 1 is a front view showing a usage example I in which a breeding aquarium air diffuser according to a first embodiment of the present invention is used exclusively for air diffusion.

FIG. 2 is a perspective view showing the vicinity of an air diffusion member in Usage Example I.

FIG. 3 is an end view of FIG. 2;

FIG. 4 is a front view showing a usage example II in which the air diffuser is used as a power source for generating a water flow of a submersible filtration device.

FIG. 5 is a cross-sectional view showing the vicinity of an air diffusion member and a submerged charging type filtration device in Usage Example II.

FIG. 6 is a perspective view showing the vicinity of an air diffusion member in Usage Example II.

FIG. 7 is a perspective view showing a pedestal of the underwater charging type filtration device in Usage Example II.

FIG. 8 is a front view showing a usage example III in which the air diffuser is used as a power source for generating a water flow of a submerged bottom filtration device.

FIG. 9 is a cross-sectional view showing a part of the underwater bottom surface filtration device in Use Example III.

FIG. 10 is an exploded perspective view showing the vicinity of an air diffusion member according to a second embodiment of the present invention.

FIG. 11 is a plan view of the air diffusion member of FIG.

FIG. 12: XII-XII of FIG. 11 with an air supply pipe
It is a line sectional view.

FIG. 13 is a front view showing an air diffusion member according to a third embodiment of the present invention.

FIG. 14 is a cross-sectional view of the air diffusion member of FIG.

FIG. 15 is an exploded perspective view of the air diffusion member.

FIG. 16 is a perspective view of a main part of the air diffusion member.

FIG. 17 is a cross-sectional view showing a modified example of a submerged-in-water-type filtration device used in usage example II of the embodiment.

FIG. 18 is an exploded perspective view of a lower portion of the underwater charging type filtering device.

FIG. 19 is an exploded perspective view of the upper part of the underwater charging type filtration device.

FIG. 20 shows a stand of the underwater charging type filtration device;
(A) is a plan view and (b) is a cross-sectional view.

FIGS. 21A and 21B show a cylindrical support member of the underwater charging type filtration device, wherein FIG. 21A is a plan view and FIG. 21B is a cross-sectional view.

FIGS. 22A and 22B show an air diffusion member according to a fourth embodiment of the present invention, wherein FIG. 22A is a front view and FIG.

FIG. 23 is a cross-sectional view of the air diffusion member of FIG.

FIG. 24 is a perspective view showing the vicinity of an air diffusion member of a conventional breeding aquarium air diffuser.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 air diffusion device for breeding aquarium 2 pressurized air supply device 3 air supply pipe 4 air diffusion member 5 round bar 6 groove 7 air passage 8 spout 9 through hole 20 underwater filtration device 24 cylinder 28 elastic short pipe 34 Air passageway 35 Spout 40 Underwater bottom surface type filtration device 50 Air diffusion member 51 Cup body 52 Groove 53 Air passage 54 Outlet 60 Air diffusion member 61 Base end side connecting body 62 Intermediate part connecting body 63 Front side connecting body 65 Step wall part 66 Thin cylinder part 69 Groove 70 Thick cylinder part 73 Air bubble guide ridge 74 Thick cylinder part 75 Projection part 79 Air passageway 80 Spouting port 90 Submersible filtration device 94 Cylindrical body 120 Air diffusion member 121 Base end side Connecting body 122 Intermediate part connecting body 123 End side connecting body 125 Conical cylinder part 128 Groove 129 Conical cylinder part 131 Weight 132 Air passageway 133 Spout

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Katsunori Hanada 2035 Shimoi, Shioi-machi, Owariasahi-shi, Aichi Prefecture Onoda ALC Co., Ltd. PH Product Division

Claims (24)

[Claims] 1. An air diffusion member mounted at an end of an air supply pipe, wherein an air passage is formed between at least two grooves and an opposing surface removably covering the grooves. An air diffusion member for a breeding aquarium, characterized in that an opening end of the air diffusion port is an air outlet. 2. The air diffusion member for a breeding aquarium according to claim 1, wherein the facing surface is an inner peripheral surface or an outer peripheral surface of an air supply pipe. 3. The air diffusion member is provided with the groove on an outer peripheral surface of a rod, and the outer peripheral surface is removably inserted into an inner peripheral surface of an end portion of the air supply pipe. Air diffusion member for breeding aquarium. 4. The air diffusion member for a breeding aquarium according to claim 3, wherein a through hole is provided at the center of the rod. 5. The air diffusion member is provided with the groove on an inner peripheral surface of a cup body, and the inner peripheral surface is removably inserted into an outer peripheral surface of an end of the air supply pipe. An air diffusion member for a breeding aquarium as described in the above. 6. The air diffusion member for a breeding aquarium according to claim 5, wherein said groove is formed to extend to an inner bottom surface of said cup body. 7. The air diffusion member has at least two connecting members detachably connected to each other, and the groove and the opposing surface are provided relatively to one connecting member and the other connecting member to be connected. The air diffusion member for a breeding aquarium according to claim 1. 8. The thick cylinder of one of the linked bodies which is provided with a thick cylindrical part having a relatively large inner and outer diameter and a thin cylindrical part having a relatively small inner and outer diameter via a step wall portion. 8. The air diffusion member for a breeding aquarium according to claim 7, wherein the two connecting members are detachably connected by fitting an outer peripheral surface of a thin cylindrical portion of the other connecting member to an inner peripheral surface of the portion. 9. The air diffusion member for a breeding aquarium according to claim 8, wherein a gradient is provided between an inner peripheral surface of the thick cylindrical portion and an outer peripheral surface of the thin cylindrical portion. 10. The breeding according to claim 8, wherein the groove is provided on an outer peripheral surface of the thin cylindrical portion and an outer surface of the step wall portion, and an inner peripheral surface and an end surface of the thick cylindrical portion are the facing surfaces. Air diffusion member for aquarium. 11. The breeding according to claim 8, wherein the groove is provided on an inner peripheral surface and an end surface of the thick cylindrical portion, and an outer peripheral surface of the thin cylindrical portion and an outer surface of the step wall portion are the opposing surfaces. Air diffusion member for aquarium. 12. The connecting body has a conical cylindrical portion with a slope on the inner and outer peripheral surfaces, and the inner peripheral surface of the conical cylindrical portion of one connecting body is connected to the outer peripheral surface of the conical cylindrical portion of the other connecting body. The air diffusion member for a breeding aquarium according to claim 7, wherein the two connecting bodies are detachably connected by fitting the surfaces. 13. The air diffusion member for a breeding aquarium according to claim 12, wherein the groove is provided on an outer peripheral surface of the conical cylindrical portion, and an inner peripheral surface of the conical cylindrical portion is the opposed surface. 14. The air diffusion member for a breeding aquarium according to claim 12, wherein the groove is provided on an inner peripheral surface of the conical cylinder portion, and an outer peripheral surface of the conical cylinder portion is the opposing surface. 15. The jet nozzle according to claim 7, wherein said jet port has a polygonal shape.
15. The air diffusion member for a breeding aquarium according to any one of 14. 16. The air bubble guide ridge or the air bubble guide groove extending vertically is provided on the outer peripheral surface of the connecting body located immediately above the jet port. An air diffusion member for a breeding aquarium as described in the above. 17. The air diffusion member for a breeding aquarium according to any one of claims 7 to 16, wherein at least the outer peripheral surface of the connector is formed to have a smooth glossy surface. 18. The air diffusion member for a breeding aquarium according to claim 7, wherein all or a part of the connecting body is formed of a material having a specific gravity of 2 or more. 19. The air diffusion member for a breeding aquarium according to any one of claims 7 to 18, wherein all or a part of the connecting body has a weight embedded therein. 20. When the air diffusion member is used by being inserted into a cylindrical body, the outer peripheral surface of the connecting body is
20. The breeding aquarium air according to any one of claims 7 to 19, wherein at least two protrusions are provided to contact the inner peripheral surface of the cylinder and support the air diffusion member at the center of the cylinder. Diffusing member. 21. A breeding aquarium comprising a pressurized air supply device, an air supply pipe for sending air supplied from the pressurized air supply device, and an air diffusion member attached to an end of the air supply pipe. In the air diffusion device for use, the air diffusion member forms an air passage between at least two grooves and an opposing surface detachably fitted to the groove, and an open end of the air passage is formed by an air outlet. A diffuser for breeding aquariums, characterized in that: 22. The breeding aquarium diffuser according to claim 21, wherein the breeding aquarium diffuser is combined with the filtering device so that the breeding aquarium diffuser can be used as a water flow generating power source for the filtering device. 23. The air diffusion device for a breeding aquarium according to claim 22, wherein the filtration device is a submersion type filtration device. 24. The air diffusion device for a breeding aquarium according to claim 22, wherein the filtration device is an underwater bottom type filtration device.