JP4943201B2 - Water filtration equipment - Google Patents

Description

  The present invention relates to a water filtration device for an aquarium that requires filtration of water in an aquarium, such as an aquarium that can be used for breeding and appreciating animals such as fish and for growing and appreciating plants.

  Various types of water filtration devices have been proposed and developed so far, such as aquariums used for animal breeding and appreciation, plant cultivation and appreciation, etc. that require filtration of water in the aquarium, It has been put to practical use, and it has a water filtration part and a pump arrangement part connected to the water filtration part, and the water filtration part and pump in a connected state 2. Description of the Related Art There is known a water filtration device for an aquarium that is used by installing an arrangement portion on the upper part of the aquarium.

4 and 5 show examples thereof.
A water filtration device A ′ shown in FIG. 4 includes a water filtration part 1 ′ and a pump arrangement part 2 ′ provided continuously on the right side in the figure.

  The water filtration part 1 ′ includes a horizontally long box-shaped case 11 ′ having an open upper end, and has a filtering material accommodation space s1 ′ adjacent to the pump placement part 2 ′ in the case 11 ′. ing. A filter medium support plate 12 'having a large number of water passage holes (not shown) is disposed below the filter medium accommodation space s1'. The case 11 'has a filtered water receiving space s2' below the filter medium support plate 12 '.

The case 11 ′ also has a box-shaped filtered water discharge portion 13 ′ having an open upper end on the side opposite to the pump placement portion 2 ′ with the filtering material accommodation space s 1 ′ therebetween.
There is a partition wall 11b 'between the filtering material accommodation space s1' and the pump placement portion 2 ', and there is a partition wall 11a' between the space s1 'and the filtrate discharge portion 13'.

  In use, the filter medium F is accommodated in the filter medium accommodation space s1 ′ while being supported by the filter medium support plate 12 ′, and a water spray plate in which a large number of water spray holes (not shown) are formed above the filter medium. 14 'is arranged. The water spray plate 14 ′ is disposed above the filter medium F by supporting both left and right end portions thereof on the partition walls 11 a ′ and 11 b ′.

  A filtered water receiving space s2 'below the filter medium support plate 12' extends under the partition wall 11a 'to the filtered water discharge portion 13'.

  A water discharge pipe 131 ′ for adjusting the water level in the water filtration part 1 ′ is provided upright from the bottom of the filtered water discharge part 13 ′, and its upper end serves as a water inlet 131 a ′ through which filtered water flows. A water diffuser 132 'that diffuses and discharges filtered water into the water tank may be connected to the lower end of the water discharge pipe 131'.

  In the illustrated example, the pump arrangement portion 2 ′ is formed integrally with the case 11 ′, has a box shape in which an upper end is opened, and an opening (not shown) is formed in the bottom wall 21 ′. The pump motor part pm 'constituting the pumping pump P' is installed therein, and the pumping pump main body pb 'is suspended from the motor part pm' through the bottom wall opening. A water absorption pipe p1 'that enters the water in the aquarium is connected to the water intake port of the pump body pb', and a water supply pipe p2 'is connected to the water discharge port of the pump body pb'.

  The water supply pipe p2 'extends upward through the bottom wall opening of the pump disposing portion 2', and the water outlet p2a 'is positioned above the filter medium F and the upper watering plate 14'.

  This water filtration device A ′ is used by installing an integrated water filtration part 1 ′ and pump arrangement part 2 ′ on the upper frame f of the water tank B. The water absorption pipe p1 'connected to the pump body pb' in such a state is used by being put in the water W in the water tank B. In addition, in FIG. 4, g is a glass plate of the side peripheral wall of a water tank.

  In the water filtration device A ′ installed as described above, the water W in the water tank is sucked into the pump main body pb ′ from the water absorption pipe p1 ′ by driving the pump main body pb ′ with the pump motor unit pm ′. It is supplied to the sprinkling plate 14 ′ through the water supply pipe p2 ′, further supplied to each part of the filter medium F from the sprinkling plate 14 ′ and filtered, and enters the filtered water discharge part 13 ′ from the filtered water receiving space s2 ′. It is discharged from the water discharge pipe 131 ′ and returned to the water tank B.

  The water filtration apparatus A ″ illustrated in FIG. 5 employs a pumping pump P ″ instead of the pumping pump P ′ in the water filtering apparatus A ′ illustrated in FIG. 4. The other points are the same as those of the apparatus A 'shown in FIG. The same reference numerals as those in FIG. 4 are assigned to the same parts and portions as those in the apparatus A ′ shown in FIG.

  The pumping pump P ″ in the apparatus A ″ of FIG. 5 is a pump that can be used by being immersed in water. The water intake pipe p1 ″ is at the water inlet of the pump P ″ and the water pipe p2 ″ is at the water outlet of the pump P ″. Is connected.

  The water supply pipe p2 ″ passes through the bottom wall opening of the pump arrangement portion 2 ′, but a pump handling handle H is provided above the bottom wall, and the handle H is installed in the pump arrangement portion 2 ′. Thus, the pump P ″ is supported.

  The water supply pipe p2 ″ extends upward through the bottom wall opening of the pump arrangement portion 2 ′, and the water outlet p2a ″ is positioned above the filter medium F and the upper watering plate 14 ′. Also in this apparatus A ″, the water W in the water tank B can be filtered in the same manner as the apparatus A ′.

  However, even if it is apparatus A 'shown in FIG. 4 or apparatus A' 'shown in FIG. 5, although the pump arrangement | positioning part occupies some space as it is, it is only used for arrangement | positioning of a pumping pump. From the viewpoint of effective use of space, a device is required for this point.

  Therefore, the present invention has a water filtration part and a pump arrangement part connected to the water filtration part, and the water filtration part and the pump arrangement part in the state of being arranged are arranged in the upper part of the water tank. A water filtration device for a water tank to be installed and used, wherein the water filtration part is a filter for discharging the water filtered by the filter medium storage space and the filter medium stored in the filter medium storage space into the water tank. A water discharge portion, and the pump placement portion pumps water in the water tank and supplies water used for placement of a pumping pump from above to the filter medium accommodated in the filter medium storage space of the water filtration portion. An object of the present invention is to provide a water filtration device that can be used not only for the arrangement of a pump, but also for improving the quality of the water in the aquarium.

In order to solve the above problems, the present invention provides:
A water tank having a water filtration part and a pump arrangement part connected to the water filtration part, and the water filtration part and the pump arrangement part in a continuous state are installed on the upper part of the water tank. The water filtration part has a filter medium accommodating space and a filtered water discharge part for discharging water filtered by the filter medium accommodated in the filter medium accommodating space into the water tank. The pump disposing unit is a water filtering device used for disposing a pumping pump that pumps up water in the water tank and supplies it from above to the filtering material accommodated in the filtering material accommodating space of the water filtering unit. ,
It has an auxiliary case installed in the pump placement part,
The auxiliary case has an internal space in which a predetermined water quality control material is accommodated, and a pump connection portion at the bottom of the auxiliary case that connects a water discharge port portion of a pump that can be used underwater as the pump. And a water supply pipe rising from the pump connection part, connected to an upper end part of the water supply pipe, and a part of the water pumped up from the water tank by the pump and rising up the water supply pipe is filtered by the water filtration part A water flow device for diverting and dropping the remaining portion toward the water quality control material stored in the internal space of the auxiliary case toward the filter medium stored in the material storage space, and being supplied to the auxiliary case by dropping from the water flow device And an overflow outlet part to the water filtration part.
The water filtering part has an overflow water receiving space for receiving the overflow water from the overflow outlet part of the auxiliary case, and has a filtered water receiving space located below the filter medium accommodated in the filter medium accommodating space. And the filtered water receiving space provides a water filtering device in communication with the overflow water receiving space and the filtered water discharge portion.

  Here, the “water quality management material” to be accommodated in the auxiliary case is one or more of a filter medium, a member that promotes the attachment and propagation of microorganisms that direct the water quality to an appropriate one, a water quality improver, and the like.

  A water filtration device according to the present invention accommodates a filter medium in a filter medium accommodation space of a water filtration part, installs an auxiliary case in a pump arrangement part, and is a pumping pump that can be used underwater at a pump connection part at the bottom of the auxiliary case. The water discharge port portion is connected, and a predetermined water quality control material is accommodated in the auxiliary case, and the water filtration portion and the pump placement portion in a continuous state are installed in the upper part of the water tank, The water inlet can be used in communication with water in the water tank directly or via an appropriate water absorbing pipe.

  The water pumped up from the water tank by the operation of the pumping pump rises up the water pipe that rises from the pump connection part of the auxiliary case and reaches the water flow device, where a part of the water is stored in the filtering material storage space of the water filtering part. The filtered material is supplied, filtered by the filtered material, flows into the filtered water receiving space of the water filtering unit, flows into the filtered water discharge unit, and is discharged from the filtered water discharge unit into the water tank.

  The remainder of the water that has been pumped up by the pump and reaches the water flow device is supplied from the water flow device into the auxiliary case and touches the water quality control material inside the case. The water whose level in the case has risen overflows from the overflow outlet portion of the case to the overflow water receiving space of the water filtering portion, flows from the space into the filtered water receiving space, and passes through the filtering material. At the same time, it flows from the filtered water receiving space into the filtered water discharge section and is discharged from there into the water tank.

  Thus, according to the water filtration device according to the present invention, the pump arrangement part can be used not only for the arrangement of the pump, but also the arrangement of the water quality management material and the water quality management material for a part of the water pumped up by the pump. It can also be used to improve water quality through contact with water.

  In the water filtering device according to the present invention, the water filtering part may have a side wall facing the pump arranging part, and the overflow water receiving space may be formed inside the side wall.

  In this case, the overflow outlet portion of the auxiliary case can be formed so as to be able to face the upper part of the overflow water receiving space of the water filtering portion in a state where the auxiliary case is installed in the pump arrangement portion. . The filter medium accommodation space may be adjacent to the overflow water receiving space.

  The water filtration part may have the filtrate discharge part on the opposite side of the overflow water receiving space with the filter material accommodation space in between. The filtrate water receiving space located below the filter medium accommodated in the filter medium accommodation space of the water filtration part may extend to the filtrate discharge part.

  The filtered water discharge section may include a water discharge pipe for adjusting the water level in the water filtering section, which rises from the bottom and has a water inlet at the upper end.

  As described above, according to the present invention, the water filtration part and the pump arrangement part connected to the water filtration part are provided, and the water filtration part and the pump arrangement part in a continuous state are provided. The water filtration device for the aquarium is used by installing the section in the upper part of the aquarium, and the water filtration section has a filter medium accommodating space and water filtered by the filter medium accommodated in the filter medium accommodating space into the water tank. A pumping water discharge part for discharging, the pump disposing part pumping up the water in the water tank and supplying the filtering medium accommodated in the filtering medium accommodating space of the water filtering part from above It is a water filtration apparatus used for arrangement | positioning, Comprising: Not only arrangement | positioning of a pumping pump but the water filtration apparatus which can be utilized for the further water quality improvement of the water in a tank can be provided.

Hereinafter, embodiments of the present invention will be described.
FIG. 1 is a plan view of an example of a water filtration device according to the present invention, and FIG. 2 is a cross-sectional view taken along line XX of FIG.

  The water filtration apparatus A shown in FIGS. 1 and 2 includes a water filtration part 1 and a pump arrangement part 2 connected to the right side of the figure.

  The water filtration part 1 includes a case 11 in the form of a horizontally long box. The case 11 has an internal space surrounded by left and right side walls 11a and 11b, a front side wall 11c, a back side wall 11d, and a bottom wall 11e. The upper end of the case 11 is open.

  Two protrusions 111 extending in the vertical direction are formed in parallel on the outer surface of the right side wall 11 b of the case 11. This protrusion 111 is used for connection to the case 11 of the pump placement portion 2 which will be described in detail later.

  In the case 11 of the water filtration part 1, a right partition wall 121 is arranged in parallel to the side wall, slightly spaced from the right side wall 11b of the case, and from the lower end of the partition wall 121 to the case bottom wall 11e. A filter medium support plate 122 extending in parallel toward the case left side wall 11a is disposed.

  The partition wall 121 and the filter medium support plate 122 are integrally formed from a synthetic resin, and the integral molded product is bent at approximately 90 degrees at the boundary portion between the partition wall 121 and the filter medium support plate 122, thereby separating the partition wall. The wall 121 rises from the filter medium support plate 122.

  The front side edge of the partition wall 121 is inserted between two projecting ridges 121f projecting vertically on the inner surface of the front side wall 11c of the case 11, and the rear side edge of the partition wall 121 is the case. 11 is inserted between two projecting ridges 121r projecting in the vertical direction on the inner surface of the rear side wall 11d.

A large number of water passage slits 122 s are formed in the filter medium support plate 122.
The bottom portion of the case below the filter medium support plate 122 is dropped downward to form a filtered water receiving space s2. The filter medium support plate 122 is supported by a plurality of support protrusions 123 erected from the bottom wall 11e of the case 11 in the space s2.

In the case 11, a left partition wall 141 is further disposed at a position farther to the right than the left wall 11 a of the case 11, and the case left wall 11 a is parallel to the case bottom wall 11 e from the lower end of the partition wall 141. A plate-like member 142 extending in the direction is arranged.
The filter medium support plate 122 extends to the vicinity of the partition wall 141.

  The partition wall 141 and the plate-like member 142 are integrally formed from a synthetic resin, and the integrally molded product is bent at approximately 90 degrees at the boundary portion between the partition wall 141 and the plate-like member 142, whereby the partition wall 141 is obtained. Stands up from the plate-like member 142.

  The front side edge of the partition wall 141 is inserted between the two protruding strips 141f projecting vertically on the inner surface of the front side wall 11c of the case 11, and the back side edge of the partition wall 121 is the case. 11 is inserted between two projecting ridges 141r protruding in the vertical direction on the inner surface of the rear side wall 11d.

A left side portion of the case 11 from the partition wall 141 is the filtered water discharge portion 14, and a right side portion (up to the partition wall 121) space is a filtering material accommodation space s 1.
The filter medium F is disposed in the space s1.

  In addition, after the filter medium F is accommodated in the space s1, the watering plate 15 can be disposed above the filter medium F. The water spray plate 15 is provided with a large number of water passage holes 151 so that water supplied thereto can be supplied to each part of the filter medium F as will be described later, and also has a flange portion 152 for guiding water in the longitudinal direction of the water spray plate. ing. The water spray plate 15 is placed above the filter medium F by placing both ends thereof on the upper ends of the partition plates 121 and 141.

A plurality of water passage holes 141 a (see FIG. 2) communicating with the filtered water discharge portion 14 are formed in the lower part of the partition wall 141.
The plate-like member 142 integrated with the partition wall 141 is formed with a large number of water passage slits 142s, and a dome-shaped portion 143 bulges upward at a position close to the partition wall 141. Further, an opening 144 is formed on the back side of the dome-shaped portion 143.

  The dome-shaped portion 143 is open on the partition wall 141 side, and a plurality of water passage slits 143s are formed in other portions.

The filtered water receiving space s <b> 2 extends from the right side wall 11 b of the case 11 to below the dome-shaped portion 143.
Accordingly, a space (excess water receiving space) s3 between the right side wall 11b of the case 11 and the partition wall 121 partitioning the right side of the filtering material accommodation space s1 communicates with the filtered water receiving space s2. The water discharge part 14 is also connected to the filtered water receiving space s2.

  As can be seen from FIG. 2, a water discharge pipe 145 is inserted into the bottom portion of the case 11 below the dome shape portion 143 in the filtered water discharge portion 14 and rises into the dome shape portion 143. The upper end of the water discharge pipe 145 is a water inlet 145a. The water discharge pipe 145 is for adjusting the water level in the water filtration part 1 to the height position of the water inlet 145a of the water discharge pipe.

  A water diffuser 146 is detachably connected to the bottom portion of the case 11 corresponding to the lower end opening of the water discharge pipe 145.

  Further, an emergency water discharge pipe portion 147 is erected on the bottom portion of the case 11 corresponding to the opening 144 on the back side of the dome shape portion of the plate-like member 142, and penetrates the opening 144 to form the dome shape portion 143. It stands up to almost the same height as the top. The water discharge pipe portion 147 is intended to allow water to be discharged when the water level rises from the upper end of the water discharge pipe 145 because the water discharge cannot catch up with the discharge from the water discharge pipe 145 alone.

  In the filtered water discharge portion 14, a water quality management material F2 such as a filtering material may be accommodated in the region s4 above the plate-like member 142 and outside the dome-shaped portion 143.

  The pump placement portion 2 includes a box-shaped case 21 connected to the right end of the case 11 as a whole in a U-shape in plan view. The case 21 includes a groove 211 that is inserted into a ridge 111 provided at the right end of the case 11 of the water filtering portion 1, and is connected to the case 11 by inserting the ridge 111 into the groove 211. The The case 21 of the pump placement portion 2 may be formed integrally with the case 11.

The case 21 has an open upper end, and an opening 212 is formed in the bottom wall 21e. An auxiliary case 3 is installed in the case 21. The bottom of the auxiliary case 3 faces the outside of the case 21 from the bottom opening 212 of the case 21.
The auxiliary case 3 has a pump connection part 31 at the bottom and a water supply pipe 32 rising from the pump connection part 31 in the case 3. A water quality control material F1 such as a filter medium can be accommodated in the area around the water pipe 32 in the auxiliary case 3.

  The auxiliary case 3 has an overflow outlet 33 for overflowing water accumulated in the case 3 as will be described later, at the upper part of the portion of the water filtration part 1 directed toward the case 11. The overflow outlet portion 33 also serves as a hook portion that hooks into a recess formed in the upper end portion of the right side wall 11b of the case 11 of the water filtration portion 1. The auxiliary case 3 hooks the overflow outlet portion 33 on the upper end portion of the right side wall 11b of the case 11 of the water filtration portion, and the foot portion 34 provided on the rear lower surface of the bottom portion of the auxiliary case is the bottom portion of the case 21 of the pump arrangement portion 2. Is placed in the case 21.

A water discharge port P1 of a pumping pump P that can be used underwater is detachably connected to the pump connection portion 31 at the bottom of the auxiliary case 3.
The pump according to the present embodiment includes an electric motor and a portion in which a drive magnet member that is rotationally driven by the motor is sealed in a watertight manner, and a pump body having a pump impeller that rotates together with a driven magnet member corresponding to the drive magnet member. The driven magnet member is rotated under the magnetic force by the rotation of the drive magnet member rotated by the electric motor, and thereby the impeller is rotated and pumped up, and is called a magnet pump or the like. It is what.
In this example, the water suction pipe P2 is further connected to the water suction port of the pumping pump P.

  A water flow device 35 is connected to the upper end of the water supply pipe 32. The water flow device 35 directs a part of the water pumped up from the water tank by the pump P and ascending the water pipe 32 to the filter medium F through the water spray plate 15 of the water filtration unit 1, and the remaining part of the auxiliary case 3. It is to be diverted and dropped inward.

  In this example, much of the amount of water pumped up by the pump P is diverted to the water filtration part 1 side, and the remaining part is diverted to the auxiliary case 3.

  The water filtration device A accommodates the filter medium F in the filter medium accommodation space s1 of the water filtration part 1, arranges the water spray plate 15 above it, installs the auxiliary case 3 in the pump arrangement part 2, and the auxiliary case A water discharge port P1 of a pump pump P that can be used underwater is connected to the pump connection part 31 at the bottom, and a predetermined water quality control material F1 is accommodated in the auxiliary case, and the water filter is in a continuous state. The part 1 and the pump disposing part 2 are installed in the upper frame f of the water tank B, and the water absorption pipe P2 connected to the water intake port of the pumping pump P can be put into the water W in the water tank B and used.

  The water W pumped from the water tank B by the operation of the pumping pump P ascends the water pipe 32 rising from the pump connection part 31 of the auxiliary case 3 and reaches the water flow device 35, where a part of the water is a water filtration part. 1 is supplied to the sprinkler plate 15 above the filter medium F, supplied from the sprinkler plate to each part of the filter medium F, filtered by the filter medium, falls into the filtered water receiving space s2, and flows from the filtered water discharge section. 14 and a part of the filtered water flows from the water passage hole 141a of the partition wall 141 into the filtered water discharge part 14, and further flows into the water discharge pipe 145 of the filtered water discharge part 14 from the water inlet 145a. It is diffused and released from the diffuser 146 into the water tank B. Note that the diffuser 146 may be used in water or out of water.

  When the water quality management material F2 is accommodated in the filtered water discharge part 14, the water that has flowed into the filtered water discharge part 14 is discharged while being in contact with the water quality management member F2.

  Further, the remaining portion of the water that has been pumped up by the water pump P and reaches the water flow device 35 is supplied from the water flow device 35 into the auxiliary case 3 and contacts the water quality control material F1 inside the case. The water whose level in the case 3 has risen overflows from the case overflow outlet portion 33 to the overflow water receiving space s3 of the water filtering portion 1, flows from the space s3 into the filtered water receiving space s2, and passes through the filter medium F. The filtrate flows together with the filtered water from the filtered water receiving space s2 into the filtered water discharge portion 14 and is discharged into the water tank B therefrom.

  Thus, according to the water filtration apparatus A, the pump arrangement part 2 is not only used for the arrangement of the pumping pump P, but also the arrangement of the water quality control material F1 and the water quality of a part of the water pumped up by the pumping pump P. It can also be used to improve water quality by contact with the management material F1.

  FIG. 3 shows another example of the water filtration device according to the present invention. The water filtration device A1 of FIG. 3 can connect the attachment case 4 for increasing the overall length to the pump placement portion 2 which is formed by slightly changing the right end portion in the drawing in the water filtration device A shown in FIGS. It is a thing. The other points are the same as those of the device A, and substantially the same parts and portions as those of the device A are denoted by the same reference numerals as those of the device A.

  The interconnection between the pump placement portion 2 and the attachment case 4 is performed by inserting the groove portion 41 of the attachment case 4 into the protrusion 213 provided in the pump placement portion 2. By connecting the attachment case 4, it is possible to install the water tank B1 in a larger water tank B1.

  INDUSTRIAL APPLICABILITY The present invention can be used for filtering water in an aquarium such as an aquarium that can be used for breeding and appreciating animals such as fish and for growing and appreciating plants.

It is a top view of one example of the water filtration apparatus concerning the present invention. It is sectional drawing which follows the XX line of FIG. It is sectional drawing of the other example of the water filter apparatus which concerns on this invention. It is sectional drawing of one example of the conventional water filtration apparatus. It is sectional drawing of the other example of the conventional water filtration apparatus.

Explanation of symbols

A Water filtration device 1 Water filtration part 11 Case 11a of water filtration part 1 Case left side wall 11b Case right side wall 11c Case front side wall 11d Case back side wall 11e Case bottom wall 111 Projection part 121 provided on case 11 Partition wall 121f 121r ridge 122 filter material support plate 122s water passage slit 123 support plate support projection s1 filter material accommodation space s2 filtrate water reception space s3 overflow water reception space 14 filtrate water discharge portion 141 partition wall 141a water passage hole 141f , 141r ridge 142 plate-like member 142s water passage slit 143 dome shape portion 143s water passage slit 144 dome shape portion inner side opening 15 water spray plate 151 water passage hole 152 flange portion 145 water discharge pipe 145a water inlet 146 water diffuser 147 Emergency water discharge pipe F2 Water quality management material s4 Water quality management material F2 Area 2 for installation 2 Pump arrangement part 21 Pump arrangement part case 211 Groove part 21e Case 21 bottom wall 212 Bottom wall opening 3 Auxiliary case 31 Pump connection part 32 Water supply pipe F1 Water quality control material 33 Water overflow outlet part 34 Foot Part P Pumping pump P1 Water discharge port P2 Water intake pipe 35 Moisture flower B Water tank f Water tank upper frame g Water tank glass wall A1 Water filtration device 4 Attachment case 213 Projection part 41 Groove part B1 Water tank

Claims (4)

A water tank having a water filtration part and a pump arrangement part connected to the water filtration part, and the water filtration part and the pump arrangement part in a continuous state are installed on the upper part of the water tank. The water filtration part has a filter medium accommodating space and a filtered water discharge part for discharging water filtered by the filter medium accommodated in the filter medium accommodating space into the water tank. The pump disposing unit is a water filtering device used for disposing a pumping pump that pumps up water in the water tank and supplies it from above to the filtering material accommodated in the filtering material accommodating space of the water filtering unit. ,
It has an auxiliary case installed in the pump placement part,
The auxiliary case has an internal space in which a predetermined water quality control material is accommodated, and a pump connection portion at the bottom of the auxiliary case that connects a water discharge port portion of a pump that can be used underwater as the pump. And a water supply pipe rising from the pump connection part, connected to an upper end part of the water supply pipe, and a part of the water pumped up from the water tank by the pump and rising up the water supply pipe is filtered by the water filtration part A water flow device for diverting and dropping the remaining portion toward the water quality control material stored in the internal space of the auxiliary case toward the filter medium stored in the material storage space, and being supplied to the auxiliary case by dropping from the water flow device And an overflow outlet part to the water filtration part.
The water filtering part has an overflow water receiving space for receiving the overflow water from the overflow outlet part of the auxiliary case, and has a filtered water receiving space located below the filter medium accommodated in the filter medium accommodating space. A water filtration device comprising: the filtered water receiving space communicating with the overflow water receiving space and the filtered water discharge portion.   The water filtration part has a side wall facing the pump arrangement part, the overflow water receiving space is formed inside the side wall, and the filtering material accommodation space is adjacent to the overflow water receiving space. 2. The water filtration device according to claim 1, wherein the overflow outlet portion of the auxiliary case can face an upper portion of the overflow water receiving space of the water filtration portion in a state where the auxiliary case is installed in the pump arrangement portion. .   The water filtering part has the filtered water discharge part on the side opposite to the overflow water receiving space with the filtering material accommodation space in between, and is located below the filtering material accommodated in the filtering material accommodation space The water filtration device according to claim 1, wherein the filtered water receiving space extends to the filtered water discharge portion.   The water filtration device according to claim 3, wherein the filtered water discharge portion includes a water discharge pipe for adjusting a water level in the water filtration portion, which rises from the bottom and has a water inlet at an upper end.