JPH11253068A - Overflow unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized overflow unit ensuring the discharging quantity necessary for filtration and having beautiful appearance. SOLUTION: This overflow unit 10 is composed of a discharging socket 25, a discharging part having a discharging channel 21 in a unit main body, an upper flow-in socket 26, a lower flow-in socket 27 and an ejection part having an upper ejection channel 22 and a lower ejection channel 23 in the unit main body. The discharging part is extended upward along the right side plate 31b of the water tank main body 31 to form a rectangular form and has a discharging port 21a to discharge water from the water tank main body 30 at the upper part of the discharging part. The ejection part is extended upward along the right side plate 31b together with the discharging part to form a rectangular form and has an upper ejection pipe 28 and a lower ejection pipe 29.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overflow unit attached to a filtration device for circulating and filtering water in an aquarium such as an aquarium fish tank or a live fish tank.

[0002]

2. Description of the Related Art An ornamental fish tank 130 as shown in FIG. 8 is provided with a filtering device for filtering water in a tank body 131. The filtering device is disposed in a base 132 on which the main body of the water tank 131 can be placed, and a filter unit 133 is provided.
And a pump 134. Water tank body 1
The overflow pipe unit 110 is disposed in the inside of the overflow pipe unit 31.
As a result, the water in the water tank main body 131 is discharged to flow into the filtering device, and the water filtered by the filtering device is discharged into the water tank.

[0003] The overflow pipe unit 110 comprises:
It is composed of a discharge pipe 111, an upper water discharge pipe 112, and a lower water discharge pipe 113.
It is arranged in the vicinity of any of the corners, extending vertically. The upper end of the discharge pipe 111 is the water tank body 1.
The lower end is provided so as to be open at the upper part in the inside 31, and the lower end is connected to the filter unit 133 in the base 132 through the bottom plate 131 a of the water tank body 131, and the water in the water tank body 131 is naturally discharged ( The overflow is caused to flow into the filter unit 133. After the water flowing into the filter unit 133 is filtered, the water is discharged from the upper water discharge pipe 112 and the lower water discharge pipe 113 into the water tank body 131 by the pump 134.

[0004]

SUMMARY OF THE INVENTION In the filtering device configured as described above, the overflow pipe unit 1 is provided.
10 is exposed in the tank body 131,
Discharge pipe 111, upper and lower water discharge pipe 11
Since 2,113 is formed using a ready-made vinyl chloride pipe (hereinafter, referred to as “PVC pipe”), there is a problem that even if it is disposed at the corner of the water tank main body 131, the appearance is impaired. In addition, when a plurality of pipes 111 and the like are arranged in the water tank main body 131 so as to extend in the vertical direction, fish may enter between the pipes 111 and the like,
There is also a risk that the pipes 111 and the like may be stained, and the fish in contact with the pipes 111 and the like may be damaged.

In order to cover the overflow pipe unit 110 in the water tank main body 131, a cover 1 formed of an opaque material as shown by a chain line in FIG.
It is also conceivable to provide 14. However, since the discharge pipe 111 is configured to naturally discharge water for filtration, the discharge pipe 111 needs to have a predetermined circumferential length (cross-sectional area) with respect to the dimensions of the water tank main body 131. Therefore, it is necessary to use a pipe having a larger diameter than the discharge pipe 112 and the like. Further, if it is attempted to cover all the pipes 111 and the like, the cover 114 also becomes large, so that it is not possible to improve the aesthetic appearance much. I will. Further, when the size of the cover 114 increases, the effective volume of the water tank 130 decreases.

The present invention has been made in view of such a problem, and an object of the present invention is to provide an overflow unit which is small in size and excellent in aesthetics while securing a discharge amount required for filtration.

[0007]

In order to achieve the above object, an overflow unit according to the present invention is provided with a filtration device for circulating and filtering water in a water tank formed in a rectangular box shape with a bottom. For example, it is attached to the filter unit 33 and the pump 34) described in the embodiment, and is detachably inserted into the water tank so that the water in the water tank flows into the filtration device and the water filtered by the filtration device is discharged into the water tank. It is arranged. The overflow unit includes a discharge-side connection portion (for example, the discharge socket 2 described in the embodiment).
5), a discharge portion (for example, a portion where the discharge flow path 21 is formed in the unit body 11 described in the embodiment), and an inflow side connection portion (for example, the upper inflow socket 26 and the lower inflow portion described in the embodiment). A socket 27) and a discharge portion (for example, a portion where the upper discharge flow path 22 and the lower discharge flow path 23 are formed in the unit main body 11 described in the embodiment).

[0008] The discharge side connection portion is connected to the inflow side of the filtration device, and formed at the filtration device inlet (for example, a bottom surface of the water tank).
It is configured to be connectable to the inflow pipe 35) described in the embodiment. The discharge portion is formed in a rectangular shape extending upward from the discharge-side connection portion along the wall surface of the water tank (for example, the right side plate 31b described in the embodiment) with the discharge-side connection portion connected to the filtration device inlet. It is formed with a discharge port for discharging water in the water tank at the upper part.

[0009] The inflow-side connection portion is connected to the discharge side of the filtration device and formed at the filtration device discharge port (for example,
It is configured to be connectable to the first discharge pipe 36 and the second discharge pipe 37) described in the embodiment. The discharge unit is formed to extend upward from the inflow-side connection portion along the wall surface of the water tank (for example, the right side plate 31b described in the embodiment) with the inflow-side connection portion connected to the filtration device discharge port. It has a discharge port (for example, the upper discharge pipe 28 and the lower discharge pipe 29 described in the embodiment) for discharging the water filtered in the water tank.

According to the overflow unit configured as described above, the water in the water tank is discharged from the outlet and flows into the filtering device, and the water filtered by the filtering device is discharged from the discharge port into the water tank. The discharge part with the discharge port and the discharge part with the discharge port are formed to extend upward along the wall surface of the water tank, so that the inside of the water tank can be used effectively and widely, and the appearance is improved. Can be done. In particular, the discharge port requires an opening larger than the discharge port, but since the discharge port is formed in a rectangular shape, the discharge port can be widened in the width direction of the wall surface of the water tank. For this reason, a discharge part can be formed so that the water required for filtration can be reliably discharged without compromising the aesthetic appearance. In addition, if the discharge portion is formed in a rectangular shape in accordance with the shape of the discharge portion, the appearance can be further improved.

In the overflow unit according to the present invention, not only the discharge section but also the discharge section are preferably formed in a rectangular shape so that the discharge section and the discharge section are integrally connected in the width direction. By adopting such a configuration, the design can be unified between the discharge unit and the discharge unit, so that the aesthetic appearance can be further improved.

Further, in the overflow unit according to the present invention, an upper discharge port for discharging water filtered by the filtration device from the upper part of the water tank, and a lower discharge port for discharging water filtered by the filtration device from the lower part of the water tank. It is preferable to form the discharge unit from the above. With such a configuration, purified water can be efficiently supplied into the water tank.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. First, a water tank 30 in which an overflow unit 10 according to the present invention is provided will be described with reference to FIG. This aquarium 30
A water tank main body 31 formed of a rectangular bottomed box made of transparent vinyl chloride, acrylic resin, glass, or the like, a base 32 on which the water tank main body 31 can be mounted, and a base 32 provided in the base 32 It has a filtering device including a filter unit 33 and a pump 34.

As shown in FIG. 2, an inflow pipe 35, a first discharge pipe 36, and a second discharge pipe 37 are provided on the bottom plate 31a of the water tank main body 31 so as to vertically penetrate the bottom plate 31a. The upper end of the inflow pipe 35 is the water tank body 31
The lower end thereof is connected to the inflow side of the filter unit 33. Filter unit 3
3 is connected to the inlet side of the pump 34, and the discharge side of the pump 34 has first and second discharge pipes 36, 3.
The lower end of 7 is connected. First and second discharge pipe 3
The upper end of the water tank body 6 and 37 is the same as the inflow pipe 35.
1 and open. The amount of projection of each of the pipes 35, 36, and 37 from the bottom plate 31a is set to a size to which each of the connection sockets 25, 26, and 27 described later can be connected.

The overflow unit 10 is provided in the water tank main body 31 of the water tank 30 thus configured. The overflow unit 10 is formed of an upright portion 10a and a horizontal portion 10b so that the overall shape in a side view is L-shaped. The horizontal portion 10b is formed so as to extend horizontally along the bottom plate 31 of the water tank main body 31, and the upright portion 10b is formed so as to extend upward along the right side plate 31b. I have.
The overflow unit 10 includes an L-shaped unit body 11 having a space formed therein, a first partition plate 12, a second partition plate 13, and a third partition plate 14 for partitioning the space.
Is configured.

The L-shaped space defined by the left side plate 11a and the first partition plate 12 in the space inside the unit body 11 forms a discharge flow path 21, and the discharge flow path 21 is formed. Part (left plate 11a or front plate 11e)
Etc.) constitute the discharge unit described in the claims. Further, a portion partitioned by the first partition plate 12 and the second partition plate 13 in the space inside the unit main body 11 forms an upper discharge flow path 22, and the second partition plate 13 and the right side plate 1 of the unit main body 11 are formed.
1b forms a lower discharge channel 23. The upper and lower discharge channels 22, 23
(The right side plate 11b, the front plate 11e, and the like) constitute a discharge unit described in the claims. In addition, the vertical part located in the upright part 10a in the lower discharge flow path 23 is divided into right and left by the 3rd partition plate 14, and forms the 1st lower discharge flow path 23a and the 2nd lower discharge flow path 23b. ing. Further, the discharge channel 21 is connected to the other two channels 22 and 2.
3 has a larger cross-sectional area.

On the bottom plate 11c of the unit body 11, a discharge socket 25, an upper inlet socket 26, and a lower inlet socket 27 are disposed so as to protrude downward. The discharge socket 25 is disposed so as to open to the discharge flow path 21, the upper inflow socket 26 is disposed so as to open to the upper discharge flow path 22, and the lower inflow socket 27 is disposed to open to the lower discharge flow path 23. It is arranged.

In the upper part of the unit body 11, there is no lid-like portion provided at a portion partitioned by the left side plate 11a and the first partition plate 12, and the discharge channel 21 is opened at the upper end surface as it is. To form a discharge port 21a. A portion connecting the first partition plate 12 and the right side plate 11b is covered with a cover plate 16 and is not opened upward like the discharge channel 21. In addition, the first partition plate 12 and the second partition plate 13 are formed such that their upper ends are in contact with the lid plate 16.
1, 22, 23 do not communicate with each other.

A lower discharge passage 2 is provided below the right side plate 11b.
3 is provided with a lower discharge pipe 29 which is open to the outside. The lower partition 23 is provided with the third partition plate 14 as described above, and a gap 14 a is formed between the upper end of the third partition plate 14 and the cover plate 16. Third partition plate 14
Has a lower end surface in contact with the bottom plate 11c, a front end surface in contact with the front plate 11e, and a closing plate 15 is provided below the front plate 11e. Accordingly, the lower inflow socket 27 (first lower discharge channel 23a) and the lower discharge pipe 29 (second lower discharge channel 23b) communicate with each other only in the gap 14a in the unit body 11. In addition, a small hole 11f is formed in the front plate 11e located at a position where the gap 14a is formed.

In the overflow unit 10,
Further, a lower discharge pipe L, which is a joint (hereinafter referred to as “L-bore”) for changing the flow direction by 90 °, is provided in the lower discharge pipe 29.
A lower discharge extension pipe 52 is connected to the L-boat 51. This lower discharge extension pipe 52
A plurality of horizontal discharge holes 52b are formed in a row in the longitudinal direction in addition to the discharge holes 52a at the end.

In the overflow unit 10 thus configured, the discharge socket 25 is fitted to the inflow pipe 35, the upper inflow socket 26 is fitted to the first discharge pipe 36, and the lower inflow socket 2 is fitted.
7 is fitted inside the second discharge pipe 37 and disposed inside the water tank main body 31. When the sockets 25 and the pipes 35 and the like are fitted in this manner, the back plate 11d of the unit main body 11 abuts on the right side plate 31b of the water tank main body 31 or is located near the right side plate 31b. It is formed so that.

For this reason, in the overflow unit 10, the horizontal portion 10b is arranged along the bottom plate 31a of the water tank main body 31, and the upright portion 10a is arranged along the right side plate 31b of the water tank main body 31. It will be arranged. The bottom plate 10c of the horizontal portion 10b does not contact the upper surface of the bottom plate 31a, and has a slight gap. The lower discharge extension pipe 52 is disposed along a corner formed by the bottom plate 31a and the front plate 31e,
The horizontal discharge hole 52b is provided so as to open horizontally toward the center of the water tank main body 31.

The flow of water in the water tank 30 provided with the overflow unit 10 will be described.
When water is supplied to the water tank main body 31 and the water surface reaches the upper surface of the overflow unit 10, the outlet 21
When the water in the water tank main body 31 flows into a and the supply of water is further continued, the water flowing through the discharge flow path 21 flows into the filter unit 33 via the inflow pipe 35. When water is stored in the filter unit 33, the pump 34 is driven to supply water to the upper discharge channel 22 and the lower discharge channel 23.

The water supplied to the upper discharge channel 22 rises in the channel 22 and flows from the upper discharge pipe 28 to the water tank main body 31.
It is discharged into. The water supplied to the lower discharge channel 23 rises in the first lower discharge channel 23 a connected to the lower inflow socket 27, of the portion of the channel 23 partitioned by the third partition plate 14. After that, the second lower discharge flow path 23 passes through the gap 14a (over the third partition plate 14).
b, and is discharged from the lower discharge extension pipe 53 connected to the lower discharge pipe 29.

According to the water tank 30 provided with the overflow unit 10 configured as described above, the water containing impurities such as feces in the water tank body 31 is discharged to the discharge passage 21.
After being filtered into the filter unit 33, the water is discharged by the pump 34 from the discharge holes 52a and the horizontal discharge holes 52b of the upper discharge pipe 28 and the lower discharge extension pipe 52. Therefore, the tank body 31
It can be filtered while circulating the water inside, and
The filtered water is discharged into the water tank main body 31 from above and below.
Further, in the lower part of the water tank main body 31, the filtered water is discharged from the plurality of discharge holes 52a and 52b having different discharge directions, so that the filtered water can be supplied into the water tank main body 31 with good balance. The water in the water tank main body 31 can always be purified without precipitation of impurities. In the overflow unit 10 described above, the L-bottle 51 and the lower discharge extension pipe 52 need not always be provided, and the filtered water may be directly discharged from the lower discharge pipe 29.

The above-mentioned overflow unit 10
, A portion located on the upper portion of the front plate 11e and located in the lower discharge passage 23 (portion connected to the gap 14a)
Has a small hole 11f formed through the front plate 11e. That is, when the operation of the pump 34 is stopped, the discharge side of the pump 34 (the first and second discharge pipes 3
When the operation of the pump 34 is stopped, the water in each of the discharge passages 22 and 23 is discharged when the pumps 34 and 37 are connected to a drain pipe (not shown). Get out. At this time, if the lower discharge pipe 29 (lower discharge extension pipe 52) is provided in the lower part like the overflow unit 10, not only the water in the lower discharge flow path 23 but also the lower discharge pipe 29 is formed by the principle of siphon. The water in the aquarium main body 31 is sucked out.

However, the overflow unit 1
At 0, the upper discharge passage 22 is released to atmospheric pressure by the upper discharge pipe 28, and the lower discharge passage 23 is released to atmospheric pressure by the small holes 11f. Therefore, only the water in the upper discharge passage 22 and the first lower discharge passage 23a is drained, and the water in the water tank main body 31 does not escape.

The water tank 30 is provided with a cover 40 which is substantially the same height as the upright portion 10a of the overflow unit 10 and covers the front surface and the left and right side surfaces of the overflow unit 10. This cover 4
Reference numeral 0 denotes an upright cover portion 40a and a horizontal portion 10a which cover the outer periphery of the upright portion 10a with a transparent or opaque plate-like material.
and a horizontal cover portion 40b that covers the outer periphery of b. A lower suction slit 41 is formed at the lower end of the front surface of the horizontal cover portion 40b, and a cutout 45 for preventing interference with the lower discharge extension pipe 52 is formed to the right of the lower suction slit 41.

An upper right suction slit 42 is formed in the upper part from the front to the right side of the upright cover part 40a, an upper left suction slit 43 is formed in the upper part of the left side, and an upper discharge is formed in the upper part of the front. An upper through hole 44 through which the pipe 28 can pass is formed.

By mounting the cover 40 configured as described above, the discharge of the filtered water from the discharge pipes 28 and 29 is not hindered, and the welded portions of the discharge pipes 28 and 29 are exposed. However, the overflow unit 10 can be manufactured at low cost, and the aesthetic appearance of the entire water tank 30 can be improved. If the cover 40 is configured not to be in close contact with the overflow unit 10 but to be attached with a slight gap, water is sucked from the lower portion of the water tank main body 31 through the lower suction slit 41 and the cover 40 and the overflow unit 10 are attached. And discharge outlet 21a
Can be discharged from

Here, the sectional area of the lower intake slit 41 is formed so as to be smaller than the sectional area of the outlet 21a. For this reason, the suction flow velocity in the lower suction slit 41 can be made faster than the discharge flow velocity in the discharge port 21a, and the impurities precipitated in the water tank main body 31 can be efficiently discharged. Further, since the upper right suction slit 42 and the upper left suction slit 43 are formed in the upper part of the upright cover portion 40a, an oil film near the water surface can be efficiently discharged.

In the overflow unit 10 configured as described above, a PVC pipe (VU 40, outer diameter 48 mm, inner diameter 44) having a nominal diameter of 40 is used as the discharge pipe 111.
mm) to the same size as the tank that used the tank.
, The inner size of the discharge port 21a is set to a depth of 20 mm ×
If it is formed to have a width of 75 mm, it can have a cross-sectional area substantially equal to that of the PVC pipe of VU40, and has a depth of 20 mm x a width of 50 mm
In this case, a circumferential length substantially equal to that of the PVC pipe of the VU 40 can be obtained. Therefore, since the thickness of the upright portion 10a can be reduced as compared with the related art, even if the upright portion 10a is arranged along the inner wall of the aquarium main body 31, the aesthetic appearance is not impaired, and the aquarium main body 31 is effective. There is no reduction in the volume. In addition, by forming each of the flow paths 21 and the like in a rectangular cross-sectional shape as described above, the noise when water flows can be reduced, and thus the noise when filtering the water in the water tank 30 can be reduced. .

In the above embodiment, the case where the overflow unit 10 is formed so as to have a size along one of the left and right side plates (the right side plate 31b in FIG. 1) of the water tank main body 31 has been described. However, the present invention is not limited to such a configuration. For example, when formed in a shape having a wider width, the inflow pipe 35 and the like are disposed near the rear plate 31c, and the overflow unit 10 is disposed along the rear plate 31c. Is also good.

In the above embodiment, the discharge section having the discharge flow path 21 and the discharge section having the upper discharge flow path 22 and the lower discharge flow path 23 are integrally connected in the width direction. Although the case where the overflow unit 10 is provided has been described, the present invention is not limited to such a configuration. For example, a discharge unit 50 as shown in FIG. 3, an upper discharge unit 60 as shown in FIG. 4A, and a lower discharge unit 70 as shown in FIG. 4B may be used.

The discharge unit 50 includes the overflow unit 1
As in the case of the unit body 11 in FIG. 0, the unit has an upright portion 50a and a horizontal portion 50b, and has an L-shaped discharge channel 51 like the discharge channel 21. Then, by inserting the discharge socket 55 into the inflow pipe 35,
The water tank main body 31 can be disposed along the bottom plate 31a to the right side plate 31b.

The upper discharge section 60 is provided with the upper inflow socket 6.
6, a horizontal portion 60b extending horizontally in connection with the upper inflow socket 66, and an upper discharge pipe 60a extending upward from the horizontal portion 60b. An L-bore 60c is connected to the upper end of the upper discharge pipe 60a,
The upper discharge pipe 60d is connected to the L-bore 60c.

The lower discharge portion 70 includes a lower inflow socket 77, a horizontal portion 70b extending in the horizontal direction connected to the lower inflow socket 77, and a first lower discharge pipe extending upward from the horizontal portion 70b. 70a, an L-bore 70c connected to the first lower discharge pipe 70a,
A second lower discharge pipe 70d connected to the second lower discharge pipe 70d, and an L-bottom 70f connected to the second lower discharge pipe 70d.
And the third lower discharge pipe 7 connected to the L
0g and L connected to the third lower discharge pipe 70g.
And a fourth lower discharge pipe 70i connected to the L-boss 70h.

Each of the discharge units 60, 70 thus configured
According to this, each socket 66, 77 is connected to each discharge pipe 36,
By inserting into the 37, the filtered water can be discharged from the upper part and the lower part in the water tank main body 31 in the same manner as described above, and the discharge part 50 and the discharge parts 60 and 70 can be easily formed. Note that a small hole 70e is formed in the second lower discharge pipe 70d for the same purpose as the small hole 11f.

When the discharge section 50 and the upper and lower discharge sections 60 and 70 are separately formed as described above,
If the discharge section 50 and the upper discharge section 60 and the upper discharge section 60 and the lower discharge section 70 are not disposed in close contact with each other but are arranged so as to have a predetermined gap, the lower suction slit is formed by using this gap. The water sucked in from 41 can be discharged from the outlet 21a. For this reason, when it is configured to have a predetermined gap, it is not necessary to provide a gap between the cover 40 and the overflow unit 10.

Further, as described above, the discharge portion 50 and the upper and lower discharge portions 60 and 70 are separately formed, so that the discharge portion 50 follows the left or right side plate 31b or 31d of the water tank main body 31 as described above. It is not necessary to arrange the discharge portion 50 along one of the left and right side plates 31b or 31d, and the upper and lower discharge portions 60 and 70 along the other side plate 31b or 31d.
May be arranged. In addition, the upper discharge unit 6
The 0 and lower discharge sections 70 do not necessarily need to be formed separately as described above, and have a rectangular shape similar to the part forming the upper discharge flow path 22 and the lower discharge flow path 23 in the overflow unit 10. It may be formed in a shape (L-shape) that is integrally connected in the width direction.

The overflow unit 10 according to the present invention is not used only for the water tank main body 31 configured as described above, but can also be attached to a water tank main body 81 with a lid as shown in FIG. This tank body 81
Has a rectangular window hole 81b formed in the center of a top plate 81a made of a transparent material.
1b, a window plate 82 also made of a transparent material is detachably configured. A backing plate 81c for supporting the window plate 82 is attached from the back side of the top plate 81a.

In the water tank main body 81 thus formed, the overflow unit 1 extends along the right side plate 81b.
If an attempt is made to dispose 0, the overflow unit 10 cannot be mounted straight from above because the top plate 81a is in the way. Therefore, the overflow unit 10 is inserted from the window hole 81b, and the inflow socket 35 is inserted.
However, a space for fitting each socket 25 and each pipe to each pipe 35 and the like is required below the top plate 81a. For this reason, the overflow unit 10
In order to mount the camera in the tank body 81, the unit body 1
1 and the height of the discharge unit 50 must be reduced, but if the height of the discharge unit 50 or the like is reduced, the water level in the water tank main body 81 will decrease.

Therefore, as shown by a chain line in FIG. 3, for example, a discharge adapter 90 is provided above the upright portion 50a so as to be able to move up and down with respect to the upright portion 50a. The discharge adapter 90 may be moved downward after the attachment is completed so that the water level does not drop. Also, cover 4
0, the upright cover portion 40
a may be divided into an upper portion 40c and a lower portion 40d from the position shown by the chain line in FIG.

Further, the window plate 82 attached to the water tank main body 81 is not limited to the above-mentioned flat plate, and a central portion 182a made of a transparent material projects downward as shown in FIG. A window plate 182 may be used.
As shown in FIG. 7, such a window plate 182 is
c and inserted into the window hole 81b,
Since the central portion 182a can be positioned below the water surface S, the central portion 182a is not affected by reflection or waves on the water surface, so that the inside of the water tank main body 81 can be seen well from above through the central portion 182a.

[0045]

As described above, the overflow unit of the present invention is formed in a rectangular shape extending upward from the discharge-side connection portion along the wall of the water tank with the discharge-side connection portion connected to the filtration device inlet. A discharge port for discharging the water in the water tank is formed at an upper portion of the discharge section. In addition, the water filtered by the filtration device is discharged into the water tank to a discharge portion formed extending upward from the inflow side connection portion along the wall of the water tank with the inflow side connection portion connected to the filtration device discharge port. A discharge port to be formed is formed. According to the overflow unit configured as described above, the discharge unit formed with the discharge port for discharging the water in the water tank and the discharge unit formed with the discharge port for discharging the purified water, Because it is formed to extend upward along the wall surface of the water tank, the inside of the water tank can be used effectively and widely, and the opening area (perimeter) of the outlet is increased to discharge the water required for filtration. Even if it does not spoil the aesthetics.

Further, since the overflow unit is configured to be detachable from the water tank, if dirt adheres due to long-term use, it can be easily cleaned by removing it from the water tank. Furthermore, the noise at the time of discharging water could be reduced by forming the discharge port into a rectangular shape.

In the overflow unit according to the present invention, it is preferable that not only the discharge section but also the discharge section be formed in a rectangular shape so that the discharge section and the discharge section are integrally connected in the width direction. With such a configuration, the design can be unified between the discharge unit and the discharge unit, so that the aesthetic appearance can be further improved, and no space is generated between the discharge unit and the discharge unit. Therefore, there is no damage by fish entering. Further, in the overflow unit according to the present invention, an upper discharge port for discharging water filtered by the filtration device from the upper part of the water tank,
It is preferable that a discharge part is constituted by a lower discharge port for discharging water filtered by the filtration device from a lower part of the water tank. With such a configuration, purified water can be efficiently supplied into the water tank, so that the inside of the water tank can always be kept clean.

[Brief description of the drawings]

FIG. 1 is a perspective view of an overflow unit according to the present invention and a water tank provided with the overflow unit.

FIG. 2 is a perspective view of the overflow unit.

FIG. 3 is a perspective view showing a different configuration of the overflow unit according to the present invention.

FIG. 4 is a perspective view showing a different configuration of the overflow unit according to the present invention, wherein FIG.
(B) shows the lower discharge section.

FIG. 5 is a perspective view showing a different configuration of a water tank provided with the overflow unit.

FIG. 6 is a perspective view showing a different configuration of a window plate used for the water tank.

FIG. 7 is a sectional view of the water tank and the window plate taken along the line VII-VII in FIG. 6;

FIG. 8 is a perspective view of a water tank provided with a conventional overflow pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Overflow unit 11 Unit main body 21 Discharge flow path 21a Discharge port 22 Upper discharge flow path 23 Lower discharge flow path 30 Water tank 31 Water tank main body 33 Filter unit 34 Pump

Claims (3)

[Claims] 1. A filter device for circulating and filtering water in a water tank formed in a bottomed rectangular box shape, wherein the water in the water tank flows into the filter device and is filtered by the filter device. An overflow unit detachably disposed in the water tank for discharging the discharged water into the water tank, wherein the overflow unit is connected to an inflow side of the filtration device and is connected to an inlet of a filtration device formed on a bottom surface of the water tank. A discharge-side connection portion to be connected, and a rectangular shape extending upward from the discharge-side connection portion along a wall surface of the water tank in a state where the discharge-side connection portion is connected to the filtration device inlet; An outlet having an outlet for discharging water therein, an inlet connecting to an outlet of the filter and connected to an outlet of a filter formed on the bottom of the water tank, Front connection Discharge having a discharge port formed so as to extend upward from the inflow side connection portion along the wall surface of the water tank in a state connected to the filter device discharge port, and discharge water filtered by the filter device into the water tank. An overflow unit comprising: 2. The overflow unit according to claim 1, wherein the discharge unit is formed in a rectangular shape and is integrally connected to the discharge unit in a width direction. 3. The discharge port has an upper discharge port for discharging water filtered by the filtration device from an upper part of the water tank, and a lower discharge port for discharging water filtered by the filter device from a lower part of the water tank. The overflow unit according to claim 1 or 2, wherein the overflow unit comprises: