JP5780922B2 - Internal filtration device - Google Patents

Description

  The present invention relates to an internal filtration device for breeding ornamental fish such as goldfish, tropical fish, and saltwater fish, and in particular, to increase the purification efficiency by simultaneously sucking and filtering a wide range of unpurified water in the middle region and bottom region of the aquarium. The present invention relates to an internal filtration device.

  Conventionally, as an internal filtration device for filtering and purifying unpurified water in the aquarium for rearing and growing the ornamental fish in the aquarium, the filtration main body is arranged in the middle part in the aquarium, and the middle in the aquarium What filtered the unpurified water of the area | region is well-known (for example, refer patent document 1 mentioned later).

  Further, as the internal filtration device, there is also known a device in which the filtration main body is disposed on the bottom surface in the water tank and the unpurified water in the bottom surface area in the water tank is filtered (for example, see Patent Document 2 described later). ).

Japanese Patent No. 4116888 Japanese Patent No. 3975221

  By the way, when each of the filtration devices shown in Patent Document 1 or 2 is used alone, the purification efficiency of the aquarium water may not be sufficiently obtained. In particular, the type of ornamental fish bred in the aquarium The tendency increases depending on the number, the size of the water tank, and the presence or absence of water plants in the water tank.

  Therefore, in order to increase the filtration efficiency, it is conceivable to provide each of the filtration devices shown in Patent Documents 1 and 2 in the water tank. In addition, there are problems such as troublesome maintenance of the filtration device.

  The present invention has been made in view of such circumstances, and a novel internal filtration device having a simple structure and excellent filtration efficiency, capable of simultaneously filtering a wide range of unpurified water in the middle region and the bottom region in a water tank. The purpose is to provide.

  In order to achieve the above object, the invention according to claim 1 is detachably connected to a first filtration main body installed on the bottom surface in the water tank and an appropriate position on the upper wall of the first filtration main body via connection means. The first filtration chamber formed in the first filtration body and the second filtration chamber formed in the second filtration body are in communication with each other, and these chambers are common. A water absorption force is applied by a pump, and in the first filtration chamber of the first filtration body, the filtered water that has passed through the first filter medium laid on the upper wall of the first filtration body has a small suction The filtered water that has been sucked through the hole group and that has passed through the second filter medium accommodated in the second filter chamber of the second filter body is sucked and passed through the first and second filter media. The filtered water merged and drained to the outside through the discharge passage formed in the second filtration body. It is characterized in the thing.

  In order to achieve the above object, a second aspect of the present invention is the first aspect of the present invention, wherein the first filter body and a coarse filter medium such as pebbles laid on the upper wall having a large number of suction holes are provided. The first filter medium is composed of the first filter device, the second filter body, and the second filter medium housed in the second filter body and constituting a dense filter medium such as a porous plate. 2 filtration apparatus is comprised, The said 1st filtration chamber of a 1st filtration main body, and the said 2nd filtration chamber of a 2nd filtration main body are a part of suction small holes of the said suction small hole group, and a 2nd filtration main body. It is characterized by being communicated with each other through a bottom surface suction hole formed in the bottom surface.

  In order to achieve the object, the invention according to claim 3 is the invention according to claim 1, wherein the connecting means selectively attaches and detaches the second filtration body at a plurality of locations on the upper wall of the first filtration body. It is characterized by being able to connect.

  In order to achieve the object, the invention according to claim 4 is the invention according to claim 1 or 3, wherein the connecting means includes a plurality of engaging protrusions protruding from the bottom surface of the second filtration body, A plurality of engagement holes are formed in a plurality of locations on the upper wall of the first filtration main body and are detachably engaged with the engagement protrusions.

  In order to achieve the object, the invention according to claim 5 is the invention according to claim 4, wherein the plurality of engaging protrusions projecting from the bottom surface of the second filtration body are located at the center of the second filtration body. The engagement holes provided in the upper wall of the first filtration body are spaced apart on a concentric circle centered on the longitudinal axis passing therethrough, while the engagement holes provided on the concentric circle are spaced apart from each other. A guide groove for guiding the engaging projection is formed along the concentric circle on the wall.

  In order to achieve the object, the invention described in claim 6 is the invention described in claim 1, 2, 3, 4 or 5, wherein the unpurified water in the water tank is filtered by the first filtration device, The second flow returned to the water tank after being filtered by the second filtration device through the first flow returned to the water tank through the second filtration body and the other suction hole opened in the wall surface of the second filtration body. It is characterized by being diverted into

In order to achieve the above object, the invention according to claim 7 is detachably connected to a first filtration main body installed on the bottom surface in the water tank and an appropriate position on the upper wall of the first filtration main body through connection means. An outer case, and a second filtration body detachably accommodated in the outer case,
The first filtration chamber formed in the first filtration body and the second filtration chamber formed in the second filtration body are communicated with each other via an outer case, and these chambers are connected by a common pump. A suction small hole group in which filtered water that has passed through a first filter medium laid on the upper wall of the first filtration body of the first filtration body is formed in the upper wall. The filtered water that has passed through the second filter medium accommodated in the second filter chamber of the second filter body is sucked through the first and second filter media. The water is merged and drained to the outside through a discharge passage formed in the second filtration main body.

  To achieve the above object, the invention according to claim 8 is the invention according to claim 7, wherein the outer case is formed in the same shape as the second filtration body, and the second filtration body is attached and detached. The gap formed between the upper surface of the outer case opening and the outer peripheral surface of the second filtration body is closed by a cover attached to the outer peripheral surface of the second filtration body, An engaging tongue piece constituting the connecting means J is integrally formed on the bottom surface of the case in cooperation with a suction small hole opened on the upper surface of the first filtration main body.

  According to the first aspect of the present invention, it is possible to simultaneously filter a wide range of unpurified water covering the intermediate region and the bottom region in the water tank, and the purification efficiency can be greatly increased.

  According to invention of Claim 2, the 1st filtration chamber of a 1st filtration main body and the 2nd filtration chamber of a 2nd filtration main body are the several small hole group drilled by the upper wall of a 1st filtration main body. The suction small holes of the first filtration chamber can be used to communicate with each other, so that the water absorption force generated in the first filtration chamber can be directly applied to the second filtration body, and the first and second filtration devices using a common pump can be used. Can be efficiently performed, and the structure can be simplified.

  According to invention of Claim 3, since a connection means can selectively connect a 2nd filtration main body to several places of the upper wall of a 1st filtration main body by changing a place, it is attached to a 1st filtration main body. On the other hand, the connection position of a 2nd filtration main body can be selected in multiple places, and the freedom degree of arrangement | positioning of the 2nd filtration main body in a water tank can be raised.

  According to the invention of claim 4, the connecting means is formed by a plurality of engagement protrusions protruding on the bottom surface of the second filtration body and a plurality of locations on the upper wall of the first filtration body, Since the plurality of engagement holes are detachably engaged with the engagement protrusions, the second filtration body can be closely connected to the first filtration body without moving. The water-absorbing force generated in the second filtration chamber can be efficiently applied to the first filtration chamber of the first filtration body without leaking outside.

  According to the fifth aspect of the present invention, when the plurality of engaging protrusions are engaged with the plurality of engaging holes, the engaging protrusions can be guided by the guide groove. Connection operation with the 2nd filtration main part becomes easy.

  According to the sixth aspect of the present invention, the unpurified water in the water tank is filtered by the first filtration device, and then returned to the water tank through the second filtration body, and the second filtration. Since it passes through another suction hole opened in the wall surface of the main body, and is divided into the second flow that is filtered by the second filtration device and returned to the water tank, the purification efficiency of unpurified water can be further increased. .

  According to the seventh aspect of the present invention, it is possible to connect both the filtration main bodies only by accommodating the second filtration main body in the outer case connected to the first filtration main body, and those in the water tank. The connection operation of the filter is very simple and easy, and when the second filtration body (after maintenance, etc.) is reconnected to the first filtration body, the first filter medium such as pebbles on the first filtration body is not wiped off. Just do it.

  According to the eighth aspect of the present invention, the second filtration main body can be accommodated in the outer case, and the gap between the outer case and the second filtration main body can be closed by the cover, and the filtering action can be performed efficiently and reliably. In addition, the operation of connecting the outer case to the first filtration main body can be performed easily and easily.

The perspective view which shows the state which installed the internal type filtration apparatus in the water tank (1st Embodiment). Enlarged sectional view of the internal filter along line 2-2 in FIG. 1 (first embodiment) Separation perspective view of connecting portion of first filtration device and second filtration device (first embodiment) Plan view of the second filtration body (first embodiment) FIG. 4 is an enlarged sectional view taken along line 5-5 (first embodiment). Disassembled perspective view of internal filter (first embodiment) The figure which shows the assembly | attachment process of an internal filtration apparatus (1st Embodiment). The perspective view which shows the state which installed the internal type filtration apparatus in the water tank (2nd Embodiment). Enlarged sectional view of the internal filter along line 9-9 in FIG. 8 (second embodiment) 8 is a side view of the internal filtration device as viewed in the direction of arrow 10 in FIG. 8 (second embodiment). A bottom view of the internal filtration device as viewed in the direction of arrow 11 in FIG. 10 (second embodiment). Disassembled perspective view of internal filter (second embodiment) The figure which shows the assembly | attachment process of an internal filtration apparatus (2nd Embodiment).

  Hereinafter, a first embodiment of the present invention will be described with reference to the accompanying drawings 1 to 7.

  The internal filtration device of the present invention is configured by detachably connecting the second filtration device F2 to an arbitrary portion of the first filtration device F1, and the single filtration device F1 and F2 are provided by a single air pump P. The unfiltered water in the water tank V is circulated and filtered. The first filtering device F1 is for the unpurified water in the bottom region in the water tank V, and the second filtering device F2 is in the water tank V. The unpurified water in the intermediate region is suction filtered.

  As shown in FIGS. 1 and 2, the first filtration device F <b> 1 includes a first filtration main body 1 and a first filter medium 12 made of pebbles such as a large wall laid on the upper wall 2 thereof. The first filtration body 1 is formed in a square flat shape by a hard synthetic resin material plate, the side wall 3 is bent downward from the periphery of the flat upper wall 2, and the lower surface thereof is open. The first filtration body 1 is formed by seating the open lower surface of the first filtration body 1 on the flat bottom surface in the water tank V.

  As shown in FIG. 5, a plurality of attachment pieces 5 provided with slits are integrally provided in an intermediate portion of the lower surface of the upper wall 2 of the first filtration main body 1, and suction cups 6 are provided on these attachment pieces 5. Is attached to the bottom of the water tank V so that the first filtration body 1 is fixed to the bottom surface of the water tank V.

  As shown in FIGS. 4 and 6, the upper wall 2 of the first filtration body 1 is provided with a plurality of sets (12 sets in this embodiment) of suction small hole groups 7 over the entire area, and these suction small holes are formed. The water tank V and the first filtration chamber 4 are communicated with each other through the group 7. Each group of suction small hole groups 7 is provided with a plurality of suction small holes 8 each having a circular hole 8a and a long hole 8b arranged radially at an intermediate portion, and at the outer peripheral portion thereof at a regular interval on a concentric circle. A plurality of engagement holes 9 are provided, and an arcuate guide groove 10 is provided on a concentric circle so as to communicate the engagement holes 9. The plurality of engagement holes 9 constitute connection means J in cooperation with a plurality of engagement protrusions 27 (FIG. 3) provided on the bottom surface of the second filtration body 20 described later. J allows the second filtration main body 20 to be selectively detachably connected to the plurality of suction small hole groups 7 on the upper surface of the first filtration main body 1 (see FIGS. 1 and 2). .

  The first filter medium 12 is made of pebbles such as large coral and constitutes a coarse filter medium. Unpurified water in the water tank V is generated by the water absorption force (by an air pump P described later) generated in the first filter chamber 4. 2 can be filtered through the first filter medium 12 and sucked into the first filtration chamber 4 through the plurality of sets of suction small hole groups 7 as shown by an arrow a in FIG.

  As shown in FIGS. 1 and 2, the second filtration device F2 is disposed on the first filtration device F1 in the water tank V, and sucks and filters unpurified water mainly in the intermediate region in the water tank V. And the 2nd filtration main body 20 and the 2nd filter medium 40 accommodated in the inside are provided.

  The second filtration body 20 includes an octagonal cylindrical main portion 21 made of a transparent synthetic resin, and a synthetic resin octagonal bottom portion 22 that is detachably connected to an open lower surface thereof. . At the center of the upper wall of the main portion 21, a discharge passage 23 projects integrally upward, and a plurality of other suction holes 24 are formed in the upper wall. In addition, a pair of insertion tongue pieces 25 for connecting the bottom portion 22 are formed on the opposing portion of the lower side edge of the main body portion 21. As clearly shown in FIG. 3, a plurality of bottom surface suction holes 26 each having a circular hole 26a and a long hole 26b are formed radially in the middle portion of the bottom surface of the bottom portion 22 formed on a flat surface. A plurality of engagement protrusions 27 are provided on the outer periphery of the second filtration main body 20 on a concentric circle centering on a longitudinal center line passing through the center of the second filtration main body 20 at equal intervals. It exists in the position corresponding to the corner | angular part of the bottom part 22 of an octagon.

  The plurality of engaging protrusions 27 are detachably engaged with the plurality of engaging holes 9 formed in the upper wall 2 of the first filtration main body 1 described above. The engaging hole 9 constitutes the connecting means J according to the present invention. The plurality of bottom surface suction holes 26 communicate with the suction small holes 8 of the suction small hole group 7 formed in the upper wall 2 of the first filtration body 1 described above.

  As shown in FIG. 2, an air supply passage 29 is formed in the bottom portion 22 of the second filtration main body 20, and the inner end of the air supply passage 29 is open to the upper surface of the central portion of the bottom portion 22. An air pipe 32 communicated with an air pump P disposed outside the water tank V is connected to the outer end of the air supply passage 29 and communicated with the air port 30. An airstone 31 is connected to the air supply port 30. The airstone 31 faces the second filtration chamber 34 in the second filtration body 20, and the pressurized air from the air pump P is diffused into the second filtration chamber 34. Housed in the bottom portion 22 are pebbles 35 such as a weight and a rough ridge that acts as a coarse filter medium. The upper opening surface of the bottom portion 22 is closed by a cover plate 36 having a plurality of water flow ports 37 opened over the entire area. A pair of insertion holes 38 are formed on the opposite side surfaces of the bottom portion 22, and the main portion 21 is connected to the bottom portion 22 by inserting the insertion tongue piece 25 into the insertion holes 38. Then, the second filtration body 20 is assembled.

  As shown in FIGS. 2 and 6, a second filter medium 40 forming a second filtration chamber 34 is accommodated in the second filtration main body 20. The second filter medium 40 is formed of a synthetic resin porous plate to form a dense filter medium. The second filter medium 40 is held by the drum-shaped filter medium holding frame 41 while being bent in a wavy shape. Is housed in. A communication hole 42 is formed in the bottom surface 41a of the filter medium holding frame 41, and a plurality of insertion protrusions 43 project downward from the bottom surface 41a. As shown in FIG. 2, if the filter medium holding frame 41 holding the second filter medium 40 is accommodated in the second filtration main body 20, the bottom surface 41 a of the filter medium holding frame 41 is seated on the lid plate 36, The hole 37 and the communication hole 42 communicate with each other, and the plurality of insertion protrusions 43 are inserted into the plurality of insertion holes 39 formed in the lid plate 36 of the bottom portion 22, so that the filter medium holding frame 41 is second. Fixed within the filtration body 20.

  As shown in FIG. 2, in the second filtration body 20, an unfiltered chamber 45 is formed outside the second filter medium 40, and the unfiltered chamber 45 is formed in the upper wall of the second filter body 20. The other suction hole 24 is communicated to the outside, that is, the water tank V.

  Next, the assembly procedure of the internal filtration device according to the present invention will be described.

  (1) The first filtration body 1 is placed on the bottom surface in the water tank V, and the suction cup 6 attached to the bottom surface of the filtration body 1 is adsorbed on the bottom surface in the water tank V. Thus, the first filtration body 1 is fixed to the bottom surface of the water tank V, and the first filtration chamber 4 is formed by the bottom surface and the first filtration body 1.

  (2) The second filtration body 20 in which the second filter medium 40 is accommodated and held is placed in the water tank V and positioned on the first filtration body 1, and one of a plurality of sets (24 sets) of the water absorption small hole group 7. One is selected and placed on it, and the plurality of engagement projections 27 on the bottom surface of the second filtration body 20 are engaged with the plurality of engagement holes 9 of the water absorption small hole group 7. Thereby, the 2nd filtration main body 20 can be connected in a close state on one water absorption small hole group 7 on the 1st filtration main body 1, and in this connection state, a plurality of suction small holes of the 1st filtration main body 1 8 communicates with the bottom suction hole 26 of the second filtration body 20.

  Thus, since the arc-shaped guide groove 10 is formed along the concentric circle so as to communicate with the plurality of engaging holes 9 formed on the concentric circle, the plurality of engaging projections of the second filtration body 20 are formed. In engaging the plurality of engagement holes 27 of the first filtration body 1 with the engagement protrusions 27, the engagement protrusions 27 are guided by the guide grooves 10 and moved to the engagement holes 9 of the engagement protrusions 27. Can be easily engaged.

  (3) A first filter medium 12 made of a group of pebbles such as a ridge is laid on the first filter body 1. Accordingly, the remaining plurality of water absorption small hole groups 7 other than the single water absorption small hole group 7 connected to the second filtration main body 20 are covered with the first filter medium 12.

  (4) The air pump P disposed outside the water tank V is connected to the air supply passage 29 of the second filtration body 20.

  This completes the assembly of the internal filtration device according to the present invention.

  Next, the operation of this internal filter will be described.

  When the air pump P is driven, the pressurized air from there passes through the air pipe 32 and the air supply passage 29, passes through the air stone 31, and is jetted into the second filtration chamber 34 in the second filtration body 20 in the form of bubbles. The ejected air becomes an air flow and rises in the second filtration chamber 34, and accordingly, the water in the second filtration chamber 34 also rises and is discharged into the water tank V through the discharge passage 23 together with the air flow. As a result, the water absorption force acts in the second filtration chamber 34 and also acts on the first filtration chamber 4 through the bottom surface suction hole 26 and the suction small hole 8. As a result, the unpurified water in the water tank V flows from the first filter medium 12 to the first filtration chamber 4 → the bottom portion 22 → the second filtration chamber 34 as shown by arrows a and b in FIG. And flow through the other water absorption holes 24 → second filter medium 40 → second filter chamber 34 (second flow) as indicated by arrows c and d in FIG. Filtered. Then, the two filtered water flows (first and second flows) are merged in the second filtration chamber 34 as shown by an arrow e in FIG. 2 and returned to the water tank V from the discharge passage 23.

  As described above, by driving the single air pump P, the water in the bottom area in the water tank V can be filtered by the first filter medium 12, and the water in the intermediate area in the water tank V can be filtered by the second filter medium 40. The unpurified water in the water tank V can be filtered over a wide range, and the purification efficiency is greatly increased.

  The first filtration chamber 4 of the first filtration body 1 and the second filtration chamber 34 of the second filtration body 20 are formed of a plurality of suction small hole groups 7 formed in the upper wall 2 of the first filtration body 1. Since the water absorbing force generated in the first filtration chamber 4 can be directly applied to the second filtration body 20 by using a part thereof, the first and second filtration devices using the common air pump P can be used. The operations of F1 and F2 can be performed efficiently, and the structure can be simplified.

  Further, the connecting means J can selectively connect the second filtration body 20 to a plurality of locations on the upper wall 2 of the first filtration body 1, and the second filtration body 20 can be connected to the first filtration body 1. Since a plurality of connection positions can be selected, the degree of freedom of the arrangement of the second filtration main body 20 in the water tank V can be increased, and the connection means J projects from the bottom surface of the second filtration main body 20. A plurality of engaging projections 27 and a plurality of engaging holes 9 which are formed in a plurality of locations on the upper wall 2 of the first filtration body 1 and are detachably engaged with the engaging projections 27. The second filtration body 20 can be connected in close contact with the first filtration body 1 without moving, and the water absorption generated in the second filtration chamber 34 of the second filtration body 20 is not leaked outside. It can efficiently affect the first filtration chamber 4 of the first filtration body 1.

  Furthermore, when engaging the plurality of engaging protrusions 27 with the plurality of engaging holes 9, the engaging protrusions 27 can be guided by the guide grooves 10, so that the first filtering body 1 and the second filtering body 20 are engaged. Connection operation becomes easy.

  Furthermore, after the unpurified water in the water tank V is filtered by the first filtration device F1, the first flow returned to the water tank V through the second filtration body F2 and the second filtration body 20 Since it is divided into the second flow that passes through the other suction holes 24 opened in the wall surface and is filtered by the second filtration device F2 and returned into the water tank V, the purification efficiency of unpurified water can be further increased. it can.

  When the connection position of the second filtration body 20 to the first filtration body 1 is changed or maintenance is performed, the second filtration body 20 is separated from the first filtration body 1 as shown in FIG. After that, the first filter medium 12 (pebbles, etc.) at the position where the second filtration body 2 is to be connected is wiped by hand again, and the selected one suction small hole group of the first filtration body 1 7 is connected to the second filtration body 20.

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  The operation of connecting the second filtration body 20 to the first filtration body 1 is mainly performed in the water tank V. At this time, in the first embodiment, as shown in FIG. After wiping the first filter medium 12 such as pebbles with the hand or the like, the second filtration body 2 is connected to the connection position on the first filtration body 1, but in the water tank V in which water is stored, The wiping operation of the first filter medium 12 such as pebbles is troublesome, and if the first filter medium 12 such as pebbles remains in the connection position on the first filter body 1, 2 The first filter medium 12 is sandwiched between the filtration body 2 and a gap is formed, which may lead to a decrease in filtration efficiency. In the second embodiment described below, a second such as a pebbles is used. Without wiping work of the filter medium 12, it is easy to perform the close connection work of the second filtration body onto the first filtration body 1. , The outer case 50 is prepared.

  The outer case 50 is an octagonal cylinder shape made of a transparent synthetic resin, like the second filtration main body 20, and the upper surface 51 of the opening is formed in a container shape so as to be able to accommodate the second filtration main body 20. A columnar part 52 having a semicircular cross section for receiving the air pipe 32 connected to the air supply passage 29 of the second filtration body 20 is integrally formed on the outer surface of one side thereof. Is formed. Further, a plurality (four) of engaging tongue pieces 53 project downward from the intermediate portion of the bottom surface of the outer case 50 at intervals in the circumferential direction, and as shown in FIG. The bottom surface of the outer case 50 is closely connected to the upper wall 2 of the first filtration body 1 by inserting the pieces 53 into four of the plurality of long holes 8b opened in the upper wall 2 of the first filtration body 1. be able to.

  The engaging tongue piece 53 and the elongated hole 8b constitute a connecting means J ′.

  Further, as shown in FIG. 11, an inner communication hole (octagonal shape) 54 and a plurality of outer communication holes (ladder shape) 55 are opened on the bottom surface of the outer case 50 on the inner and outer sides of the insertion tongue piece 53. The outer case 50 is communicated with the first filtration chamber 4 of the first filtration body 1 through the inner communication hole 54 and the outer communication hole 55 and the suction small hole 8, and the bottom suction hole 26 and the inside of the outer case 50. Through the inside of the bottom portion 22, the second filtration body 34 of the second filtration body 20 is communicated.

  Furthermore, a plurality of small engagement holes 56 are formed in the outer peripheral surface of the bottom surface of the outer case 50 at intervals in the circumferential direction. When the second filtration main body 20 is accommodated in the outer case 50, The engagement small hole 56 is engaged with the engagement protrusion 27 on the bottom surface of the second filtration body 20. Thereby, the relative positioning of the outer case 50 and the 2nd filtration main body 2 in the circumferential direction is made.

  The open upper surface 51 of the outer case 50 that houses the second filtration body 20 is watertightly closed by the cover 60. As shown in FIG. 12, the cover 60 is formed in an octagonal cylinder shape, and an outer fitting surface 61 fitted to the inner circumferential surface of the outer case 50 is formed on the outer circumferential surface thereof, and the inner circumferential surface thereof. In addition, an inner fitting surface 62 that fits to the outer peripheral surface of the second filtration body 2 is formed. Further, a closing piece 63 that closes the upper surface of the opening of the columnar portion 52 of the outer case 50 is formed on the outer surface of one side of the cover 60.

  As shown in FIG. 13, after the inner fitting surface 62 of the octagonal cylindrical cover 60 is fitted to the outer peripheral surface of the main portion 21 of the second filtration body 20, the outer fitting surface 61 is passed through the second filtration. If the upper surface 51 of the outer case 50 containing the main body 20 is fitted, the upper surface 51 of the outer case 50 is closed in a watertight manner.

  Next, the operation of the second embodiment of the present invention will be described.

  As shown in FIG. 12, one of a plurality of water absorption small hole groups 7 on the first filtration body 1 installed on the bottom surface of the water tank V is selected, and the outer case 50 is positioned thereon, and the bottom surface thereof. The plurality (four) of insertion tongue pieces 53 are respectively inserted into and engaged with a plurality (four) of long holes (8b) among the plurality of suction small holes 8 of the water absorption small hole group 7. As a result, the bottom surface of the outer case 50 is connected in close contact with one water-absorbing small hole group 7 on the first filtration body 1. In this connected state, the inside of the outer case 50 communicates with the first filtration chamber 4 of the first filtration body 1.

  Next, the second filtration main body 20 is accommodated in the outer case 50. At this time, since both the outer case 50 and the second filtration main body 20 are formed in an octagonal cylinder shape, their sides are aligned and the air pipe 32 connected to the first filtration main body 20 is connected to its columnar portion. 52.

  As shown in FIG. 9, the space between the opening upper surface 51 of the outer case 50 and the upper edge of the second filtration main body 20 is watertightly closed by the cover 60. The outer fitting surface 61 of the cover 60 is fitted to the opening upper surface 51 of the outer case 50, and the inner fitting surface 62 is fitted to the outer peripheral surface of the second filtration body 20.

  On the first filtration body 1, the remaining water absorption hole groups 7 other than the one water absorption hole group 7 connected to the outer case 50 are covered with the first filter medium 12.

  This completes the assembly of the internal filtration device.

  The filtration function of the internal filtration device of the second embodiment of the present invention is the same as that of the first embodiment, but the water in the water tank V is driven into the first filtration chamber by driving the air pump P. 1 and sucked into the second filtration chamber 34 through the inner and outer communication holes 54 and 55 of the outer case 50.

  Thus, according to the second embodiment, the connection operation of the second filtration body 20 with respect to the first filtration body 1 can be performed very simply and reliably, and the replacement of the second filtration body 20 and the second filter medium 40 can be performed. Maintenance such as replacement can be easily and easily performed by removing the second filtration body 20 from the outer case 50 while the outer case 50 is connected to the first filtration body 1.

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

  For example, in the first and second embodiments of the present invention, a water absorption force is generated in the first and second filtration chambers by the air pump, but instead of this air pump, a submersible pump such as a second filtration is used. You may use the submersible pump provided indoors.

DESCRIPTION OF SYMBOLS 1 ... The 1st filtration main body 2 ... The upper wall 4 ... The 1st filtration chamber 7 ... The suction small hole group 8 ... Small suction hole 8b ... Small suction hole (long hole)
9... Engagement hole 12... First filter medium 20... Second filtration body 26. ············ engagement projection 29 ········· Air supply passage 34 ············································ Case 53... Engagement tongue 60... Cover F 1... First filtration device F 2. ... Connection means J '... Connection means P ... Pump (air pump)
V ... Water tank

Claims (8)

  A first filtration main body (1) installed on the bottom surface in the water tank (V) and an appropriate position on the upper wall (2) of the first filtration main body (1) are detachably connected via a connecting means (J). A first filtration chamber (4) formed in the first filtration body (1) and a second filtration chamber formed in the second filtration body (20). (34) are connected to each other, and the chambers (4, 34) are made to absorb water by a common pump (P), and the first filtration chamber (4) of the first filtration body (1) is provided. ), The filtered water that has passed through the first filter medium (12) laid on the upper wall (2) is sucked through the suction small hole group (7) drilled in the upper wall (2), and The filtered water that has passed through the second filter medium (40) accommodated in the second filtration chamber (34) of the second filtration body (20) is sucked into the second filtration chamber (34). The filtered water that has passed through the first and second filter media (12, 40) merges and is drained to the outside through the discharge passage (23) formed in the second filtration body (20). , Internal filtration device.   The first filter body (1) and the first filter medium (12) made of a coarse filter medium such as pebbles laid on the upper wall (2) having a large number of suction small holes (8) formed therein 1 filtration apparatus (F1) is comprised, and the said 2nd filtration body (20) and the said 2nd filtration medium (40) which is accommodated in the inside and comprises a dense filter medium, such as a porous board, are more. 2 filtration device (F2) is configured, the first filtration chamber (4) of the first filtration body (1) and the second filtration chamber (34) of the second filtration body (20) The said small hole (8) of a group (7) and the mutual connection via the bottom face suction hole (26) drilled in the bottom face of a 2nd filtration main body (20), The said claim, It is characterized by the above-mentioned. The internal filtration apparatus according to 1.   The connection means (J) is configured to selectively attach and detach the second filtration body (20) to a plurality of locations on the upper wall (2) of the first filtration body (1). The internal filtration device according to claim 1, characterized in that it is characterized in that   The connecting means (J) includes a plurality of engagement protrusions (27) provided on the bottom surface of the second filtration body (20) and a plurality of locations on the upper wall (2) of the first filtration body (1). The internal filtration device according to claim 1 or 3, characterized in that it comprises a plurality of engagement holes (9) that are pierced in and detachably engaged with the engagement protrusions (27). .   The plurality of engaging protrusions (27) protruding from the bottom surface of the second filtration body (20) are spaced apart on a concentric circle centering on a longitudinal axis passing through the center of the second filtration body (20). On the other hand, the engagement holes (9) drilled in the upper wall (2) of the first filtration main body (1) are provided on the concentric circles at intervals and on the upper wall (2). 5. The internal filter according to claim 4, wherein a guide groove (10) for guiding the engaging protrusion (27) is formed along a concentric circle.   The unpurified water in the water tank (V) is filtered by the first filtration device (F1) and then returned to the water tank (V) through the second filtration body (20). 2 The second flow passes through another suction hole (24) opened in the wall surface of the filtration body (20), is filtered by the second filtration device (F2), and is divided into the second flow returned to the water tank (V). The internal filtration device according to claim 1, 2, 3, 4 or 5. A first filtration main body (1) installed on the bottom surface in the water tank (V) and an appropriate position on the upper wall of the first filtration main body (1) are detachably connected via connection means (J '). An outer case (50), and a second filtration body (20) removably accommodated in the outer case (50),
The first filtration chamber (4) formed in the first filtration body (1) and the second filtration chamber (34) formed in the second filtration body (20) are interposed via the outer case (50). These chambers (4, 34) are connected to each other by a common pump (P) so that a water absorption force is applied to the chambers (4, 34). The filtered water that has passed through the first filter medium (12) laid on the upper wall is sucked through the suction small hole group (7) drilled in the upper wall, and the second filtration body (20) In the second filtration chamber (34), the filtered water that passed through the second filter medium (40) accommodated therein was sucked, and passed through the first and second filter media (12, 40). The filtered water merges and is drained to the outside through the discharge passage (23) formed in the second filtration body (20). Internal type filtration apparatus.   The outer case (50) is formed in the same shape as the second filtration main body (20) and detachably accommodates the second filtration main body (20). A gap formed between the upper surface of the opening (51) and the outer peripheral surface of the second filtration body (20) is closed by a cover (60) attached to the outer peripheral surface of the second filtration body (20), On the bottom surface of the outer case (50), an engaging tongue piece (53) constituting the connecting means (J ') in cooperation with the suction small hole (8b) opened on the upper surface of the first filtration body (1). 8. The internal filtration device according to claim 7, wherein is integrally formed.

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