JP2004174364A - External type filtration device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To outstandingly enhance cleaning efficiency of water by enhancing filtration efficiency by a filtration element itself of a filtration unit and promoting propagation of aerobic microorganism against the filtration element by properly controlling flow speed of water flowing in the filtration unit and passing water through the filtration element by siphon action in an external type filtration device detachably installed on an upper surface of an opening of a water tank. <P>SOLUTION: The external type filtration device comprises a filtration body F placed on an upper surface of the water tank V; and a water suction unit W mounted to this filtration body F. Water sucked up by the water suction unit W is divided to first flow of water directly returned to the water tank V through a shower pipe 21 and second flow of water returned into the water tank V after it is passed through the filtration unit 6 in a filtration case 1 utilizing the siphon action and is filtered. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
TECHNICAL FIELD The present invention relates to an external filtering device including a filtering main body installed on an upper surface of an opening of a breeding aquarium for breeding a goldfish, a tropical fish, a saltwater fish, etc., and configured to circulate and filter water in the aquarium.
[0002]
[Prior art]
Generally, in order to breed and breed ornamental fish such as goldfish, tropical fish and saltwater fish in the aquarium, as a filtration device for filtering and purifying water in the aquarium, the filtration body is installed on the upper surface of the opening of the aquarium. An external filter device is known in which water in a water tank is forcibly circulated in the filter body by a pump connected to the filter body and filtered, and water after filtration is returned to the water tank. For example, see Non-Patent Document 1).
[0003]
[Non-patent document 1]
Shigetoshi Umezu, "How to Keep Tropical Fish and Diseases", published by Takahashi Shoten, July 20, 1990, 15th edition (filtration equipment pages 107-110)
[0004]
[Problems to be solved by the invention]
By the way, since such an external filtration device can install the filtration main body which is the main part on the upper surface of the water tank, this filtration device does not reduce the effective volume in the water tank, It is widely used because it has the advantages of not deteriorating the scenery of the apparatus, and has the advantage that maintenance such as replacement of parts of the filtration device and cleaning can be performed without putting a hand in the water tank.
[0005]
However, the conventional external filtration device draws unpurified water in a water tank into a filtration case by a pump, and directly pressurizes the water from a discharge port to a filtration surface of a filtration element provided in the filtration case. Since the water is returned to the water tank after filtration, it is difficult to evenly apply the unfiltered water to the filtration surface having a relatively large area of the filtration element. There is a problem that the material to be filtered, such as bait and leaf pieces, adheres to the filter element in a biased manner, and the frequency of replacement and cleaning of the filter element increases.In addition, since the entire amount of pressurized water from the pump passes through the filter element, The speed of the water flowing through the filter element cannot be adjusted, and it is difficult to propagate aerobic microorganisms on the filter element. Flow is another problem of the slower can not be made to function sufficiently suitable) breeding of aerobic microorganisms.
[0006]
The present invention has been made in view of such circumstances, and it is possible to uniformly pass unpurified water having the same flow velocity through the entire area of the filtration element by using the siphon action, and to propagate the aerobic microorganisms in the filtration element. It is an object of the present invention to provide a novel external filtration device that can promote the efficiency of purification of unpurified water as a whole by greatly improving the efficiency.
[0007]
[Means for Solving the Problems]
As described above, the invention according to claim 1 is an external filtration device including a filtration main body installed on the upper surface of an opening of a water tank and a water absorption unit that sucks unpurified water in the water tank into the filtration main body. The filtration body includes a filtration case having a filtration chamber formed therein, and a filtration unit housed in the filtration chamber. The filtration case has an upper end opened into the filtration chamber and a lower end communicating with a drain port. A drop tube having a predetermined height is provided upright, and the water absorption unit is provided with a submersible pump, and a water absorption chamber for storing water in a water tank sucked up by the submersible pump. A first outlet for returning the water in the water absorption chamber directly into the water tank, and a second outlet for flowing the water into the filtration chamber, wherein the water in the water absorption chamber is provided in the first water outlet. Return to the tank directly through the exit Flows into the filtration chamber through the second outlet and the second water flow returned to the water tank by the siphon action of the drop tube through the filtration unit. According to such a feature, in the external filtration device, the water of the second flow flowing from the water absorption unit to the filtration chamber of the filtration case via the water absorption chamber is filtered by the suction unit by the siphon action. Of the first stream entering the water absorption chamber from the water absorption unit without passing through the filtration unit (without being filtered) in the water tank. The second stream of water that is returned directly and that passes through the filtration unit has a greater flow resistance than the first stream of water that does not pass through it, so its flow rate and flow rate While being suppressed, it flows evenly over the entire area of the filtration element, and as a result, the clogging of the filtration element of the filtration unit is reduced, and the propagation of aerobic microorganisms in the filtration element is promoted. Both the filtering action of water and the organic purifying action of water by aerobic microorganisms can be enhanced.
[0008]
According to a second aspect of the present invention, in the first aspect of the present invention, the flow rate of the water flowing separately into the first water flow and the second water flow is set to the water absorption unit. According to this feature, in addition to the effect of the first aspect of the invention, the flow rate of the first water flow and the second water flow is adjusted. It can be freely selected and adjusted.
[0009]
Further, the invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the filtration unit is detachably attached to the drop tube provided on a bottom wall of the filtration case. According to this feature, in addition to the effects of the invention described in claim 1 or 2, the support structure of the filtration unit to the filtration case can be simplified, and the operation of attaching and detaching the filtration unit is easy. become.
[0010]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings.
[0011]
An embodiment of the present invention will be described with reference to FIGS.
[0012]
FIG. 1 is a perspective view when an external filtration device is set in a water tank, FIG. 2 is a plan view taken along the arrow 2 in FIG. 1, FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. 2 is a sectional view taken along line 4-4 in FIG. 2, FIG. 5 is a sectional view taken along line 5-5 in FIG. 2, FIG. 6 is an enlarged sectional view taken along line 6-6 in FIG. 2 is a sectional view taken along line 7-7 of FIG. 2, FIG. 8 is a sectional view taken along line 8-8 of FIG. 2, FIG. 9 is an exploded sectional view of the filter main body, and FIG. 11 is a cross-sectional view taken along line 11-11 of FIG. 10.
[0013]
As shown in FIG. 1, the external filtering device according to the present embodiment is a so-called upper filtering device which is detachably installed on the upper surface of the opening of the water tank V and is used on the upper surface of the opening of the water tank V. And a water absorption unit W for forcibly supplying water in a water tank into the filtration main body F.
[0014]
The filtration case 1 of the filtration main body F includes a case main body 2 and a lid 3 that closes the upper surface of the opening so as to be openable and closable, and the length thereof is shorter than the width of the water tank V. At both ends in the length direction, U-shaped right and left hangers 4 and 5 are slidably supported. After these hangers 4 and 5 are slid and adjusted to an appropriate length, both ends thereof are connected to a water tank V. The filter case 1 can be supported on the upper surface of the opening of the water tank V by engaging the left and right edges of the filter case 1.
[0015]
A filtration unit 6 to be described later is detachably accommodated in the filtration case 1, and the water absorption unit W is provided at one upper edge (right edge in FIGS. 1 to 3) in the longitudinal direction of the filtration case 1. It is detachably suspended and supported.
[0016]
The water absorbing unit W has a submersible pump 8 connected to a power source P. The submersible pump 8 has a suction port connected to a strainer 9 and a discharge port connected to a water suction pipe 10. The water absorption pipe 10 extends vertically upward, and the upper end of the opening is connected to the water absorption chamber 11. The water-absorbing chamber 11 is formed in a rectangular box shape, and an engagement recess for detachably suspending the water-absorbing unit W on the upper end edge of the filtration case 1 is formed on the lower surface thereof. As shown in FIG. 6, the water absorption chamber 11 is partitioned into a first chamber 14 and a second chamber 15 by a weir plate 12, and these chambers 14 and 15 are opened at both ends of the weir plate 12. The two communication ports 17A and 17B communicate with each other. Of the two communication ports 17A and 17B, one communication port 17A on the side closer to the outlet of the water absorption pipe 10 has a smaller opening area than the other communication port 17B on the farther side, and the first communication port 17A has the first opening. The flow rate of water passing through the one and the other communication ports 17A and 17B from the chamber 14 is made uniform (if the opening areas of the two communication ports 17A and 17B are made the same, the outlet of the water absorption pipe 10 is used). (A larger amount of water flows in the communication port 17A closer to the water supply port than in the communication port 17B farther away.)
[0017]
As shown in FIGS. 2 to 6, a first outlet 19 is opened in an end bottom wall of the first chamber 14 that is away from the outlet of the water suction pipe 10. A vertical base of a dead end shower tube 21 formed in an L shape through a connection tube 20 is connected to be freely detachable. The tip of the shower tube 21 extends substantially horizontally below the filtration case 1 and has a plurality of injection ports 22 opening downward, and is stored in the first chamber 14 as described later in detail. A part of the water thus obtained is ejected from the plurality of nozzles 22 without being filtered (without flowing to the filtering unit 6), and is directly returned into the water tank V (the first water). flow).
[0018]
As shown most clearly in FIGS. 6 and 9, a flow control valve 24 is provided at the upper end of the opening of the first outlet 19. This flow control valve 24 has a handle portion 24h and an arc-shaped valve portion 24v provided integrally therewith so as to be able to variably restrict the first outlet 19 and adjust the rotation of the handle portion 24h. The first outlet 19 can be continuously throttled by a dynamic operation.
[0019]
As shown in FIGS. 5 and 6, two second outlets 26A and 26B are opened at both ends of the bottom wall of the second chamber 15, and these two outlets 26A and 26B As shown in FIGS. These two second outlets 26A and 26B are located near the two communication ports 17A and 17B, respectively. The water that has flowed into the second chamber 15 flows through the second outlets 26A and 26B into the filtration chamber C (second water flow).
[0020]
Therefore, according to the operation of the submersible pump 8, the unpurified water in the water tank V is sucked into the first chamber 14 through the water suction pipe 10, and a part of the water in the first chamber 14 The water is returned directly from the shower pipe 21 into the water tank V via the control valve 24 (the first water flow), and the remaining water of the water enters the second chamber 15 through the two communication ports 17A and 17B. From here, it flows into the filtration chamber C in the filtration case 1 through the two second outlets 26A and 26B (the flow of the second water). The distribution flow rate of the water diverted to the first outlet 19 and the second outlets 26A and 26B is continuously adjusted by turning the flow control valve 24.
[0021]
As shown in FIG. 1, the handle 24 h of the flow control valve 24 penetrates a through hole 3 h formed in the cover 3 of the filtration case 1, projects to the outside, and rotates from the outside of the filtration case 1. It can be adjusted.
[0022]
As shown most clearly in FIG. 9, a plurality of, in this embodiment, three, drop tubes 28 are erected along the longitudinal direction of the bottom wall in the filter case 1 at intervals. The drop tubes 28 have a certain height (head), and the upper end thereof is opened in the filter case 1 and the lower end thereof is provided on the lower surface of the bottom wall of the filter case 1 in the longitudinal direction. The downstream end of the drain pipe 29 communicates with a drain port 30 that opens into the water tank V. The water flowing into the filtration chamber C in the filtration case 1 is stored in the chamber C, and when the water level exceeds the height of the head tube 28, the water stored in the filtration case 1 , From there through the drain pipe 29 by the siphon action and returned from the drain port 30 into the water tank V.
[0023]
As shown in FIG. 3, a drain 32 is opened at a downstream end of the filtration case 1, that is, at a corner opposite to a side where the water absorption unit W is mounted, and an overflow drain pipe 33 is erected on the drain 32. Is done. The overflow drain pipe 33 extends higher than the plurality of head pipes 28. When the water stored in the filtration case 1 reaches a higher water level than the head pipe 28 for some reason, the overflow water is supplied to the overflow drain pipe 33. The drain pipe 33 allows the water to be returned into the water tank V through the drain 32, so that the stored water does not overflow the upper edge of the filtration case 1.
[0024]
A plurality (three) of filtration units 6 in a number corresponding to the number of the head tubes 28 are detachably accommodated in the filtration case 1. Since each of the filtration units 6 has the same structure, one of the units will be described below. As shown in FIGS. A ring-shaped upper mounting plate 37 having projecting pieces projecting in the radial direction, and a lower mounting plate 38 formed in an octagonal shape are connected to a plurality of outer connecting rods 39 located outside thereof and to the outer connecting rods 39 in a circumferential direction. , And a plate-shaped filter element 41 is wound around the outer and inner connecting rods 39 and 40 of the mounting frame 38 alternately and endlessly in a zigzag manner. Then, a clean room 42 is defined inside the filtration element 41. At the center of the mounting frame 36, there is provided a hollow support shaft 43 having a number of vertical slits. Outside the support shaft 43, a porous cylindrical body 44 concentrically surrounding the support shaft 43 is provided. A purifying agent 45 such as activated carbon is accommodated in an annular space between the porous cylindrical body 44 and the support shaft 43. A number of small holes 46 communicating with the clean room 42 are formed in the lower mounting plate 38 of the mounting frame 36.
[0025]
In the three filtration units 6 configured as described above, the support shafts 43 at the center portions thereof are removably inserted into the drop tubes 28 of the filtration case 1 respectively. Thereby, as shown in FIGS. 1 to 3, the three filtration units 6 are accommodated in the filtration chamber C of the filtration case 1 in a line in the longitudinal direction.
[0026]
Next, the operation of this embodiment will be described.
[0027]
When using this filtration device, as shown in FIGS. And a plurality of filtration units 6 are accommodated in the filtration case 1 as described above. A water absorption unit W is suspended and supported on the upper end edge of one end of the filtration case 1, and the submersible pump 8 of the unit W is immersed in the water of the water tank V. The upper surface of the opening of the filtering case 1 is closed by the lid 3. As described above, the upper filtration device according to the present invention is set in the water tank V.
[0028]
Here, due to the operation of the submersible pump 8 connected to the power source P, the unpurified water in the water tank V is primarily filtered by the strainer 9 and is sucked up by the submersible pump 8, and an arrow a (FIGS. 5 and 6). As shown in (1), the water is stored in the first chamber 14 of the water absorption chamber 11 from the water absorption pipe 10. A part of the stored water in the first chamber 14 flows to the first outlet 19 (first water flow) as shown by an arrow b (FIGS. 4 and 6), and the remaining part is an arrow. As shown in FIGS. 6 d and 6 e (FIG. 6), the water is split and flows to the second outlets 26 </ b> A and 26 </ b> B (second water flow). The flow rate of the water flowing to the first and second outlets 19; 26A, 26B is adjusted by turning the flow control valve 24 provided at the first outlet 19.
[0029]
The water flowing to the first outlet 19 does not flow to the filtration chamber C but flows to the shower pipe 21 without being filtered as it is, and as shown by arrows c (FIG. 2), the water tank V from the plurality of nozzles 22. (First water flow).
[0030]
On the other hand, the remaining water in the first chamber overflows the left and right communication ports 17A and 17B of the weir plate 12 and passes through the two second outlet ports 26A and 26B as shown by an arrow d (FIG. 6). As shown by an arrow e (FIGS. 2, 5, and 6), it flows into the filtration chamber C of the filtration case 1 along the longitudinal direction. At this time, since the opening of the communication port 17A closer to the water suction pipe 10 is smaller than that of the communication port 17B farther from the water suction pipe 10, the flow rates of the water flowing through the two second outlets 26A and 26B are equal. Is adjusted to In the filtration chamber C, the water level of the water flowing into the filtration chamber C gradually rises, and the plurality of filtration units 6 are in a state in which the lower half or more is immersed in the stored water. When the water level in the filtration chamber C exceeds the height (head) of the plurality of head tubes 28, the water overflows the upper edge of the head tube 28, and as shown by an arrow e (FIG. 3), the water overflows. After flowing down the fall pipe 28, the water is returned from the outlet 30 into the water tank V through the drain pipe 29 as shown by an arrow f (FIG. 3) (second water flow).
[0031]
By the way, in the process in which the water flowing into the filtration chamber C from the second outlets 26A and 26B is returned from the drain port 30 into the water tank V, the unpurified water accumulated in the filtration chamber C is filtered by the filtration unit 6. The entire surface of the filtration surface of the element 14 is brought into contact, and is sucked into the head tube 28 by a suction force based on the siphon action generated by the presence of the head tube 28, while the water in the filtration chamber C is The water passes through the entire area and is filtered, and then passes through the purifying agent 45 to be purified. On the other hand, as described above, a part of the water sucked into the water absorption chamber 11 by the submersible pump 8 is returned directly into the water tank V through the shower pipe 21 and the remaining water flows through the filtration unit 6, so that the filtration element The water passing through 41 has a reduced flow rate and flow velocity, and as a result, the clogging of the filtration element 41 is reduced, and the propagation of aerobic microorganisms in the filtration element 41 is promoted. In addition, it is possible to enhance both the filtering action of water and the organic purifying action of water by aerobic microorganisms.
[0032]
Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various embodiments are possible within the scope of the present invention.
[0033]
【The invention's effect】
As described above, according to the first aspect of the present invention, in the external filtration device, a part of the water (the second flow water) that flows into the filtration chamber of the filtration case from the water absorption unit is suctioned by the siphon action. It is filtered by force through the filtration unit, and the remainder (water of the first stream) is returned directly into the water tank without passing through the filtration unit, and the water passing through the filtration unit passes through it Since the flow resistance is larger than that of the non-filtered water, the water passing through the filtration unit flows evenly over the entire area of the filtration element while its flow rate and flow velocity are suppressed, so that the clogging of the filtration element of the filtration unit is reduced. At the same time, the growth of aerobic microorganisms in the filtration element is promoted, and the filtering action of water by the filtering element and the organic purification action of water by the aerobic microorganisms are simultaneously performed. It is possible to increase.
[0034]
According to the second aspect of the present invention, in addition to the effect of the first aspect, the flow ratio of the first water flow and the second water flow can be freely selected and adjusted. .
[0035]
Further, according to the third aspect of the invention, in addition to the effects of the first or second aspect of the invention, the structure for supporting the filtration unit on the filtration case can be simplified, and the attachment and detachment of the filtration unit can be simplified. Operation becomes easy.
[Brief description of the drawings]
FIG. 1 is a perspective view when an external filtration device is set in a water tank. FIG. 2 is a plan view as viewed in the direction of arrow 2 in FIG. 1. FIG. 3 is a cross-sectional view taken along line 3-3 in FIG. FIG. 5 is a sectional view taken along line 5-5 of FIG. 2. FIG. 6 is an enlarged sectional view taken along line 6-6 of FIG. 3. FIG. 7 is a sectional view taken along line 7-7 of FIG. FIG. 8 is a sectional view taken along line 8-8 in FIG. 2. FIG. 9 is an exploded sectional view of the filter main body. FIG. 10 is a plan sectional view of a filtration unit taken along line 10-10 in FIG. 11 is a sectional view taken along the line 11-11 in FIG.
1. Filtration case 6 Filtration unit 8 Submersible pump 11 ········ Water absorption chamber 19 ··· First outlets 26A and 26B ··· Second outlet 24 ········· ..Flow control valve 28 Drop head 30 Drainage port C Filtration chamber F・ ・ ・ Filter body V ・ ・ ・ Water tank W ・ ・ ・ Water absorption unit

Claims (3)

An external filtration device comprising: a filtration body (F) installed on the upper surface of the opening of the water tank (V); and a water absorption unit (W) for sucking unpurified water in the water tank (V) into the filtration body (F). And
The filtration body (F) includes a filtration case (1) having a filtration chamber (C) formed therein, and a filtration unit (6) housed in the filtration chamber (C). A drop tube (28) having a predetermined height and having an upper end opened into the filtration chamber (C) and a lower end communicating with the drain port (30) is provided upright. Is provided with a submersible pump (8) and a water absorption chamber (11) for storing water in a water tank (V) sucked up by the submersible pump (8). The water absorption chamber (11) is provided with the water absorption chamber (11). 11) A first outlet (19) for directly returning water in the water tank (V) and a second outlet (26A, 26B) for flowing the water into the filtration chamber (C) are provided. The water in the water absorption chamber (11) is directly supplied to the water tank (V) through the first outlet (19). The flow of the first water to be returned and the filtration chamber (C) through the second outflow ports (26A, 26B), and the water tank (6) through the filtration unit (6) by the siphon action of the drop tube (28). An external filtering device characterized in that it flows separately from the flow of the second water returned into V). The water absorption unit (W) is provided with a flow control valve (24) that adjusts the flow rate of the water that flows separately into the first water flow and the second water flow. The external filtration device according to claim 1. The exterior according to claim 1, wherein the filtration unit is detachably attached to the head tube erected on a bottom wall of the filtration case. 4. Type filtration device.

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