JP6338236B2 - Internal filtration device - Google Patents

Description

  The present invention relates to an improvement of an internal filtration device that is installed in an aquarium for breeding ornamental fish such as goldfish, tropical fish, and saltwater fish, and circulates and filters the water in the aquarium.

  Conventionally, an internal filtration device that is installed in a proper place in a water tank for breeding and growing the ornamental fish in the water tank and circulates and filters unpurified water in the water tank is known (for example, , See Patent Document 1 below).

JP 9-38637 A

The internal filtration device disclosed in Patent Document 1 connects a case main body C ₁ and a bottom lid C ₂ to form a filtration case C, and a filter medium holding frame in which a filter medium 26 is attached in the filtration case C. F is accommodated, unpurified water in the water tank V is sucked into the filtration case C through the water inlet 3 opened in the upper surface 1 of the case main body C ₁ , filtered through the filter medium 26, and then returned to the water tank V. Has been.

  By the way, in the conventional internal filtration device, since a plurality of water inlets are opened on the upper surface of the main body of the case, fine floating substances such as fine baits and dust are easily sucked into the filter case through the water inlets. Not only causes the filtration efficiency to decrease by adhering to the filter medium, but also accelerates the filter medium to foul, and the upper surface of the filter case is fouled by the water passing through the water suction port, which impairs the appearance of the filter. There are various problems in that the strength of the upper surface of the lid plate of the filtration device is reduced.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a novel internal filtration device that can solve the above-mentioned problems.

In order to achieve the above object, the invention according to claim 1 is a rectangular tube-shaped filtration case having an open upper surface, and the filtration case is formed in a rectangular shape having the same size in plan view, and the upper surface of the opening of the filtration case. And a filtration unit accommodated in the filtration case. The filtration case defines an unfiltered chamber on the outside of the filter medium of the filtration unit and a filter chamber on the inside. In the internal filtration device used in a state where all of the filtration case and the cover plate are submerged in the water tank, a protrusion projecting downward is formed on the lower surface of each corner of the outer peripheral edge of the cover plate. The cover plate is supported on the filter case by the protrusions being in contact with the upper edge of the upper surface of the opening of the filter case, and the lower surface of the outer peripheral edge of the cover plate and the upper between the edge, within the filtration casing unpurified water in the water tank Inhale a plurality of upper water inlet is formed elongated along each side portion of the outer peripheral edge of the filtration case and the lid plate between each other of the protrusion adjacent to the further lower surface of the cover plate, the cover plate A plurality of vertical walls that extend linearly along the respective side portions at positions spaced radially inward from the outer peripheral edge of the outer peripheral edge and integrally connect the adjacent protrusions downwardly project. Thus, the unpurified water in the water tank that has flowed in from the upper water inlet contacts the vertical wall and flows downward toward the unfiltered chamber .

  In order to achieve the above object, according to a second aspect of the present invention, in the first aspect, the upper water inlet is formed substantially flush with an outer peripheral surface of the lid plate and an outer peripheral surface of the filtration case. It is characterized by.

  In order to achieve the object, the invention described in claim 3 is the one according to claim 1 or 2, wherein the upper surface of the opening of the filtration case is formed into a flat surface.

  In order to achieve the above object, a fourth aspect of the present invention is the one according to the first, second, or third aspect, wherein the pair of lids are provided on opposite sides of the lid plate and on opposite sides of the filtration case. When a pair of lock pieces that can be engaged and disengaged in the respective locking holes are suspended integrally so as to be elastically deformable in the engagement and disengagement direction, and the lock pieces are elastically deformed radially inward of the lid plate, When the cover plate is detached from the locking hole and elastically restored outward in the radial direction of the lid plate, the locking hole is engaged with the locking hole.

According to the first aspect of the present invention, the upper water inlet for sucking the unpurified water in the water tank into the filtration case is formed between the lower surface of the outer peripheral edge of the cover plate and the upper edge of the upper surface of the opening of the filtration case. In addition, it is possible to make it difficult to suck in suspended matter such as residual food and dust in the water tank from the upper water inlet, and to prevent the filtration efficiency from being deteriorated due to filter media contamination and clogging. Since the upper water inlet is not opened on the upper surface, the appearance of the entire filtering device can be improved without causing the cover plate to be contaminated by the flow of unpurified water, and the strength of the cover plate can be further increased. it can. Especially when the cover plate is placed on the filter case, the multiple protrusions that protrude from the lower surface of each corner of the outer periphery of the cover plate hit the upper edge of the upper surface of the filter case so that the cover plate is supported on the filter case. Is done. The plurality of upper water inlets formed between the lower surface of the outer peripheral edge of the lid plate and the upper edge of the filtration case are each side of the outer peripheral edge of the filtration case and the lid plate between adjacent protrusions. It is formed to be elongated along. Furthermore, on the lower surface of the cover plate, a plurality of lines that extend linearly along the side portions at positions spaced radially inward from the outer peripheral edge of the cover plate and integrally connect between adjacent protrusions. Since the vertical wall protrudes downward, the unpurified water in the water tank flows into the filtration case from the upper water inlet, flows downwardly against the vertical wall, and flows into the unfiltered chamber in the filtration case.

  According to the second aspect of the present invention, the upper water inlet is formed to be substantially flush with the outer peripheral surface of the lid plate and the outer peripheral surface of the filtration case. Therefore, the appearance of the filtration device is impaired by the upper water inlet. There is no.

  According to the invention described in claim 3, since the upper surface of the opening of the filtration case is formed as a flat surface, the operator's hand and the like are not damaged when the filtration case and the cover plate are assembled or disassembled.

  According to the fourth aspect of the present invention, the lid plate can be assembled and removed from the filtration case with one touch, the filtration device can be easily assembled and disassembled, and the filter medium can be removed. Maintenance such as replacement can be easily performed.

Side view of the internal filtration device installed in the water tank The expansion perspective view of the internal type filtration apparatus of the 2nd line arrow of Drawing 1 FIG. 1 is an enlarged plan view of an internal filter along line 3-3 in FIG. An enlarged bottom view of the internal filter along the line 4-4 in FIG. Sectional drawing which follows the 5-5 line of FIG. 3 is an enlarged cross-sectional view taken along line 6-6 in FIG. FIG. 7 is an enlarged sectional view taken along line 7-7. Disassembled perspective view of internal filter Diagram showing the process of separating the filtration unit from the filtration case

  A preferred embodiment of the present invention will be described with reference to FIGS.

As shown in FIG. 1, the internal filtration device according to the present invention is used by being installed in a proper place in a water tank V, and includes a filtration case C, a filtration unit U accommodated therein, and a filtration case. And a cover plate L that detachably closes the upper opening 1 of the C. And as shown in FIG. 1, the filtration case C and the cover board L are used in the state which all submerged in the water tank V. As shown in FIG.

  As shown in FIGS. 1-8, the filtration case C is comprised by the hard transparent synthetic resin material, is formed in the octagonal cylinder shape which opened the upper surface 1, and the bottom surface of the bottom wall 3 has several support. A leg 3 a is provided, and when this filtration case C is installed in the water tank V, a gap through which water passes is formed between the bottom surface of the water tank V. The opening upper surface 1 of the filtration case C is formed in a flat surface, and an upper water inlet 2 described later according to the present invention is opened between the upper surface 1 of the opening and the lower surface of the outer peripheral edge of the lid L described later. . The bottom wall 3 of the filtration case C is provided with a plurality of bottom water inlets 4 that communicate with the inside of the filtration case C to the outside.

  In the lower part of the filter case C, there is formed a pebble storage portion 5 in which a pebble 6 such as a large spider that functions as a weight and a coarse filter medium is stored.

  An air supply portion 7 is formed upward in the center of the bottom wall 3 of the filtration case C, and an air supply passage 8 provided in a radial direction on the lower surface of the bottom wall 3 is formed in the air supply portion 7. The ends are in communication. An outer end of the air supply passage 8 is communicated with an air pump P disposed outside the water tank V through an air pipe 9. An airstone 11 is connected to the upper surface of the air supply unit 7, and the airstone 11 passes through a cover lid 16 and a lower holding plate 22 of the filter medium holding frame 20, which will be described later, and a filtration chamber in the filtration case C. The pressurized air from the air pump P is diffused into the filtration chamber 26 through the air stone 11.

  Support columns 17 are erected on the bottom wall 3 of the filtration case C at intervals in the circumferential direction, and the cover lid 16 that covers the pebbles storage portion 5 is supported by these columns 17. The cover lid 16 is provided with a plurality of communication holes 14 that allow communication between the pebble container 5 and the unfiltered chamber 25 in the filter case C. As shown in FIG. 8, a knob 15 is erected integrally at one end of the outer peripheral edge of the cover lid 16, and by gripping this knob 15, the cover lid 16 can be easily attached to and detached from the filtration case C. doing.

  As shown most clearly in FIG. 8, a pair of U-shaped recesses 12 are formed at the upper portions of the opposite side surfaces of the filtration case C, and the locking holes 13 are formed below the recesses 12. Is formed. The recess 12 is fitted with a lock piece 45 of a cover plate L, which will be described later, and an engagement rod 46 at the lower end of the lock piece 45 is detachably engaged with the engagement hole 13.

  As shown in FIGS. 5 and 8, the filtration unit U accommodated in the filtration case C is composed of a filter medium holding frame 20 and a dense filter medium 19 formed by a synthetic resin porous plate. The filter medium holding frame 20 is formed in a drum shape by connecting the upper and lower holding plates 21 and 22 with a plurality of holding rods 23, and a plate-like dense filter medium 19 is attached to the filter medium holding frame 20. A plurality of holding bars 23 and a plurality of holding protrusions 24 projecting from the inner surfaces of the upper and lower holding plates 21 and 22 are alternately guided to be bent and held in a wave shape. And this filtration unit U is accommodated in the filtration case C, The lower holding plate 22 is seated on the said cover lid 16, The non-filtration chamber 25 (refer FIG. 5) on the outer side of the filter medium 19 is on the inner side. A filtration chamber 26 (see FIG. 5) is defined. A plurality of small holes 27 are formed in the lower holding plate 22 of the filter medium holding frame 20, and these small holes 27 communicate with the communication hole 14, and the unfiltered chamber 25 passes through the communication hole 14 and the small holes 27. The pebble container 5 at the lower part of the filter case C is communicated.

As clearly shown in FIGS. 2, 5, and 8, the lid plate L that closes the opening upper surface 1 of the filtration case C is formed in an octagonal disk shape having the same size as the filtration case C, and the upper surface is the center. It is formed in the curved concave surface which goes down toward an outer peripheral part from a part. A discharge pipe 42 is erected upward at the center of the cover plate L. A discharge port 43 of the discharge pipe 42 communicates the filtration chamber 26 in the filtration case C with the water tank V.
2, 7 and 8, a plurality of (eight) protrusions 30 are provided on the bottom surface of each corner of the outer peripheral edge of the octagonal lid plate L, and the lid plate L Are covered on the filtration case C, the protrusions 30 abut against the upper edge 1a of the opening upper surface 1 of the filtration case C, and the cover plate L is supported on the filtration case C.

When the opening upper surface 1 of the filtration case C is closed by the lid plate L, a plurality of upper water inlets 2 are formed between the lower surface of the outer peripheral edge of the lid plate L and the upper edge 1a of the filtration case C. The upper water suction port 2 extends between the protrusions 30 adjacent to each other in the circumferential direction of the filtration case C and the cover plate L, except for a lock piece 45 described later, over the entire circumference between the cover plate L and the filtration case C. Provided. The upper water inlet 2 is formed to be elongated along the sides of the outer peripheral edges of the filtration case C and the cover plate L between the adjacent protrusions 30.

  Next, the structure of the upper water inlet 2 will be described.

As shown in FIGS. 5 and 6, a groove 31 having a hook-like cross section is formed on the lower surface of the outer peripheral edge of the cover plate L, and a vertical wall 32 that protrudes downward at the back is formed. Is formed. That is, the plurality of vertical walls 32 extend linearly along the respective sides of the outer peripheral edge of the cover plate L at a position spaced radially inward from the outer peripheral edge of the cover plate L on the lower surface of the cover plate L. In this way, each of the vertical walls 32 integrally connects the adjacent protrusions 30 to each other.

On the other hand, the upper edge 1a of the opening upper surface 1 of the filtration case C faces the concave groove 31, and the inner surface 1b of the upper edge 1a is chamfered in an arc shape. Then, a hook-like water absorption passage 33 communicating with the upper water inlet 2 is formed by the concave groove 31 on the lower surface of the lid plate L and the upper edge 1a of the filtration case C. As shown by the arrow c in FIG. 6, unpurified water in the water tank V flows from the upper part water inlet 2 to the water passage 33, flows downwardly abuts the vertical wall 32, unfiltered the filtration case C Flows into the chamber 25.

  The upper water inlet 2 is formed between the lower surface of the outer peripheral edge of the cover plate L and the upper edge 1a of the filtration case C so as to make it difficult for inflow of floating substances such as residual food and dust and appearance. It is hard to see from the outside. Moreover, the cover plate L and the outer peripheral surface of the filtration case C are made substantially flush with each other, providing a sense of unity between them and improving the appearance of the filtration device.

  As shown in FIGS. 2, 5, and 8, a pair of lock pieces 45 are suspended downward and integrally on opposite sides of the cover plate L in the radial direction. An engagement rod 46 is formed integrally with the edge. The lock piece 45 can be elastically deformed (see FIG. 9) in the radial direction of the cover plate L so that the lock piece 45 can advance and retreat with respect to the engagement hole 13 of the filtration case C. Can be connected to the filtration case C.

  As shown in FIGS. 3, 5, and 6, a plurality of (eight) rib pieces 35 a and 35 b extending in the radial direction are provided integrally on the lower surface of the lid plate L with a space in the circumferential direction. The rib pieces 35a and 35b reinforce the lid plate L. Of these rib pieces 35a and 35b, hook-like support protrusions 36 are integrally formed at least at the inner ends of the pair of rib pieces 35b opposed in the radial direction.

  As shown in FIG. 5, when the cover plate L closes the opening upper surface 1 of the filtration case C, the support protrusion 36 automatically and elastically engages with the outer edge of the upper holding plate 21 of the filtration unit U. The filtration unit U can be integrally suspended from the lower surface of L, and the filtration unit U can be assembled and removed from the filtration case C with the filtration unit U suspended from the lid plate L. (See FIG. 9).

  As shown in FIG. 5, a cylindrical drawing wall 37 is integrally suspended from the lower surface of the central portion of the cover plate L, and the lower portion of the drawing wall 37 is connected to the upper holding plate 21 of the filtration unit U. Sitting on top. The drawing wall 37 prevents unpurified water that has flowed into the non-filter chamber 25 from being short-circuited into the filter chamber 26. Further, a plurality (eight) of air vent holes 38 each having a small hole are formed in the center portion of the cover plate L at intervals in the circumferential direction outside the painting wall 37. The air stored in the upper part of the filtration device is discharged to the outside through the hole 38.

  As shown in FIG. 1, a filtration unit U is accommodated in a filtration case C, and an internal filtration device configured by covering the upper surface of the opening of the filtration case C with a cover plate L is installed in a water tank V. An air pump P provided outside the water tank V is connected to the air pipe 9.

As shown in FIG. 5, when the air pump P is driven, pressurized air from the air pump 9 passes through the air pipe 9 and the air supply passage 8, passes through the airstone 11 from the air supply unit 7, and enters the filtration chamber 26 of the filtration unit U. The air blown out into a bubble form, and the air blown up into the filtration chamber 26 as the air flowed, and the water in the filtration chamber 26 was sucked up along with this, and the water tank V was passed through the discharge port 43 from the discharge pipe 42 together with the air flow. It is discharged inside. As a result, the water absorption force acts in the filtration chamber 26. Thereby, the unpurified water in the water tank V is
(1) As shown by arrows a and b in FIG. 5, the water flows from the bottom water inlet 4 → the pebbles container 5 → the filtration chamber 26 (first flow) and is filtered by the pebbles 6 as a coarse filter medium. ,
(2) As shown by arrows c and d in FIG. 5, the flow passes from the upper water inlet 2 → the water absorption passage 33 → the unfiltered chamber 25 → the filter medium 19 → the filter chamber 26 (second flow), and serves as a dense filter medium. Filtered by the filter medium 19.

  Then, the two water flows (first and second flows) merge in the filtration chamber 26 as shown by an arrow e in FIG. 2 and are returned to the water tank V from the discharge port 43 of the discharge pipe 42.

  By the way, in the said conventional filtration apparatus, since the upper water inlet is opened on the upper surface of a cover board (refer the said patent document 1), fine floating substances, such as a residual food and dust remaining in the stored water in a water tank However, the water flows directly into the filtration device with the water through the upper water inlet, causing not only a decrease in filtration efficiency due to early clogging of the filter medium, but also the cover plate being soiled by unpurified water flowing through the upper water inlet. In addition, there is a problem that the aesthetic appearance of the filter device is impaired by the upper water inlet, and further, the upper water inlet lowers the strength of the lid plate itself, but according to this embodiment, all of the above problems are solved. In other words, the upper water inlet 2 is formed between the upper edge 1a of the filtration case C and the lower surface of the outer peripheral edge of the cover plate L, so that the second upper portion above the filtration device in the water tank V. Unpurified water from the top surface of the lid L After flowing downward along the outer peripheral surface of the overcase C, it flows from the upper water inlet 2 through the water absorption passage 33 to the unfiltered chamber 25 in the filtration device, so that residual food mixed in the aquarium water in the aquarium V In addition, it is possible to make it difficult for floating substances such as dust to flow into the upper water inlet 2 without causing a reduction in filtration efficiency, and the upper water inlet 2 may contaminate the cover plate L or reduce its strength. There is nothing.

  When the filtration unit U is separated from the filtration case C in order to perform maintenance of the filtration device or the like, as shown in FIG. 9A, a pair of lock pieces 45 are gripped and indicated by an arrow x at a fingertip. As shown in FIG. 9 (B), the engagement plate 46 can be detached from the locking hole 13 of the filtration case C by pressing it inward. It can be separated from the filter case C with one touch, and maintenance such as cleaning and replacement of the filter medium 19 can be easily and easily performed.

  Further, when the filter unit U is connected to the cover plate L and accommodated in the filter case C and the inward pressing force of the pair of lock pieces 45 is released, the engagement rod 46 of the pair of lock pieces 45 becomes The filter device can be automatically engaged with the locking hole 13 of the filter case C by the elastic force and assembled with a single touch.

  Further, when the cover plate L is separated from the filtration case C, the opening upper surface 1 of the filtration case C is formed as a flat surface, so that there is no fear of damaging the operator's finger or the like.

  Although the embodiments of the present invention have been described above, the present invention is not limited thereto, and various embodiments are possible within the scope of the present invention.

  For example, in the above-described embodiment, a water absorption force is generated in the filtration chamber by the air pump, but a submersible pump may be used instead of this air pump.

1. Upper surface of opening 1a ... Upper edge 2. Upper water inlet 13 ... Locking hole
25 ..... unfiltered room
26 ... Filtration chamber
30 ... Projection
32 ········ Vertical wall 45 ····· Lock piece C ········ Filtration case L · ······························· Filtration unit V ··· .... Water tank

Claims (4)

The rectangular tube-shaped filtration case (C) whose upper surface is opened and the filtration case (C) are formed in a square shape having the same size in plan view, and the upper open surface (1) of the filtration case (C) is closed. A cover plate (L) and a filtration unit (U) accommodated in the filtration case (C) are provided . In the filtration case (C), a filter medium (19) of the filtration unit (U) is provided. An unfiltered chamber (25) is formed on the outer side, and a filter chamber (26) is defined on the inner side, and the filter case (C) and the cover plate (L) are all submerged in the water tank (V). In the internal filter used,
On the lower surface of each corner portion of the outer peripheral edge of the lid plate (L), a projecting portion (30) projecting downward is respectively projected.
The lid (L) is supported on the filtration case (C) by the protrusions (30) coming into contact with the upper edge (1a) of the opening upper surface (1) of the filtration case (C). together, the lid plate (L) between the lower surface and the upper edge of the outer peripheral edge (1a) of the water tank (V) a plurality of upper water inlet to the unpurified water sucked into the filtration inside the case (C) in the (2 ) Is formed elongated along each side of the outer peripheral edge of the filtration case (C) and the lid plate (L) between the adjacent protrusions (30) ,
Further, on the lower surface of the cover plate (L), the adjacent protrusions extend linearly along the side portions at positions spaced radially inward from the outer peripheral edge of the cover plate (L). 30) a plurality of vertical walls (32) that integrally connect each other, and the unpurified water in the water tank (V) that flows in from the upper water inlet (2) flows into the vertical wall ( 32) The internal type filtration device, which hits 32) and flows downward toward the non-filtration chamber (25) .   The inner part according to claim 1, wherein the upper water inlet (2) is formed substantially flush with an outer peripheral surface of the lid plate (L) and an outer peripheral surface of the filtration case (C). Type filtration device.   The internal filtration device according to claim 1 or 2, wherein the upper surface (1) of the opening of the filtration case (C) is formed as a flat surface.   On both opposite sides of the lid plate (L), there are a pair of locking pieces (45) that can be engaged and disengaged with a pair of locking holes (13) provided on opposite sides of the filtration case (C). When the lock piece (45) is elastically deformed inward in the radial direction of the lid plate (L), it is detached from the locking hole (13). Further, when elastically restored radially outward of the lid plate (L), the lid plate (L) is adapted to be engaged with the locking hole (13). 3. The internal filtration device according to 3.

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