CN215530927U - Fish tank - Google Patents

Abstract

The application relates to the technical field of fish tanks, and particularly discloses a fish tank which comprises a first seat body, a tank body and a second seat body which are sequentially arranged, wherein a circulating water pipe is arranged in the tank body, a plurality of circulating water openings are formed in the circulating water pipe, and the circulating water openings face to the bottom surface of the tank body so as to spray water flow for washing the bottom surface of the tank body; a water pump, a water outlet pipe and a first on-off key are arranged in the second seat body, the water pump is communicated with the circulating water pipe, a first water inlet of the water outlet pipe is communicated with the cylinder body, a first water outlet of the water outlet pipe is communicated with the outside, and the first on-off key is used for opening or closing the first water outlet. The utility model provides a water tank which can provide flow force for water flow in a circulating water pipe through a water pump, and the water flow is sprayed out through a circulating water port to wash the bottom surface of a tank body, so that the bottom of the fish tank can be cleaned conveniently, dirt at the bottom of the fish tank can be discharged to the outside, a user can change water for the fish tank conveniently, and the experience of the user is improved.

Description

Fish tank

Technical Field

The application relates to the technical field of fish tanks in general, and particularly provides a fish tank.

Background

The water changing process of the existing household fish tank is troublesome, fish need to be fished out for water changing many times, the water in the fish tank is put to clean residues at the bottom, the whole process is troublesome, and the fish can be injured in the process. Sometimes, when water is changed, the water is not needed to be changed all at once, and only a part of the water is changed. The requirement is realized in two modes, the first mode is that a part of water is taken out firstly, and then the fish tank is cleaned, and the mode is complex in water changing; secondly, a part of water in the fish tank is taken out, then new water is added, residues of the method are all at the bottom of the fish tank, and the fish tank is still dirty.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that water is not easy to change in the fish tank in the prior art, the application provides a fish tank.

In order to realize the purpose of the utility model, the following technical scheme is adopted in the application:

according to an aspect of the embodiment of the application, a fish tank is provided, which comprises a first seat body, a cylinder body and a second seat body which are arranged in sequence, wherein a circulating water pipe is arranged in the cylinder body, a plurality of circulating water ports are formed in the circulating water pipe, and the circulating water ports face to the bottom surface of the cylinder body so as to spray water flow for washing the bottom surface of the cylinder body;

the second seat body is internally provided with:

the water pump is communicated with the circulating water pipe;

the first water inlet of the water outlet pipe is communicated with the cylinder body, and the first water outlet of the water outlet pipe is communicated with the outside; and

and the first switch key is used for opening or closing the first water outlet.

According to an embodiment of the application, each of the circulating water gaps is arranged towards the first water inlet.

According to an embodiment of the present application, the first water inlet is located at a middle position of the second seat, and the circulating water pipe is disposed on an inner wall of the cylinder.

According to an embodiment of the present application, a baffle is disposed in the cylinder, the baffle divides the cylinder into a first portion and a second portion, and the second portion is communicated with the second seat through the first water inlet; the baffle plate is provided with a plurality of overflowing holes which are used for communicating the first part with the second part.

According to an embodiment of the application, the second part is conical in cross section in the height direction of the fish tank, and the first water inlet is located at the top of the cone.

According to an embodiment of the application, wherein first pedestal includes indent base and apron, first water inlet with the intercommunication has the pipeline between the indent base, the water accessible that first water inlet flowed in the pipeline flows in the indent base, still be provided with on the indent base with the second delivery port of cylinder body intercommunication.

According to an embodiment of the application, wherein the end of intaking of pipeline passes through the water pump with first water inlet intercommunication, be provided with the second on & off switch on the water pump, the second on & off switch has the intercommunication first water inlet with circulating pipe's first state and intercommunication first water inlet with the second state of pipeline.

According to an embodiment of the application, wherein the indent base is in the play water end of pipeline with set gradually a plurality of regions through the baffle between the second delivery port, a plurality of opening has been seted up on the baffle, be provided with the adsorption element that is used for filtering impurity in the region.

According to an embodiment of the present application, a U-shaped or serpentine water flow channel is formed on the concave base through a vertical plate, and two ends of the water flow channel are respectively communicated with the water outlet end of the pipeline and the second water outlet; a plurality of areas are formed in the water flow direction of the water flow channel through a plurality of spaced partition plates, a plurality of circulation holes are formed in the partition plates, and adsorption pieces used for filtering impurities are arranged in the areas.

According to an embodiment of the present application, the cover plate is provided with a vent hole, and two ends of the vent hole are respectively communicated with the outside and the second water outlet.

According to the technical scheme, the fish tank has the advantages that: make the water in the fish bowl can flow in the outlet pipe and discharge through first delivery port through setting up of outlet pipe, and simultaneously, make the water in the fish bowl have the power that flows in circulating pipe through setting up of water pump, and spout towards the cylinder body bottom surface through the circulation mouth of a river, make rivers can wash the cylinder body bottom surface, play the effort of stirring to the water of fish bowl bottom, be convenient for clear up fish bowl bottom and can arrange the dirty east and west of fish bowl bottom to the external world, convenience of customers trades the fish bowl, improve user's experience and feel.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the utility model and together with the description, serve to explain the principles of the utility model.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present invention, the drawings used in the description of the embodiments or prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.

Fig. 1 is a schematic view illustrating an overall structure of a fish tank according to an exemplary embodiment.

Fig. 2 is a cross-sectional view of a fish tank according to an exemplary embodiment.

Fig. 3 is an exploded schematic view illustrating the overall structure of a fish tank according to an exemplary embodiment.

Fig. 4 is a schematic axial view of a fish tank according to an exemplary embodiment, mainly for embodying a circulating water pipe.

Fig. 5 is a schematic structural diagram (i) of a fish tank mainly used for representing a water flow movement track according to an exemplary embodiment.

Fig. 6 is a schematic structural diagram (ii) of a fish tank mainly used for showing a water flow movement track according to an exemplary embodiment.

Wherein the reference numerals are as follows:

1. a first seat body; 2. a cylinder body; 3. a second seat body; 4. a circulating water pipe; 5. a first water inlet; 6. a water pump; 7. a circulating water gap; 8. a first water outlet; 9. a first on-off key; 10. a baffle plate; 11. an overflowing hole; 12. a first portion; 13. a second portion; 14. a concave base; 15. a cover plate; 16. a pipeline; 17. a second water outlet; 18. a partition plate; 19. a flow-through hole; 20. an area; 21. a vertical plate; 22. a vent hole; 23. a second on-off key; 24. and (5) discharging a water pipe.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It is noted that in the description and claims of the present application and in the above-mentioned drawings, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Also, the terms "comprises," "comprising," and "having," as well as any variations thereof or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements explicitly listed, but may include other steps or elements not explicitly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

Referring to fig. 1 to 6, the embodiment of the present disclosure provides a fish tank, which includes a first seat body 1, a tank body 2, and a second seat body 3, which are sequentially disposed, a circulating water pipe 4 is disposed in the tank body 2, a plurality of circulating water ports 7 are disposed on the circulating water pipe 4, and the circulating water ports 7 face the bottom surface of the tank body 2 to spray water for washing the bottom surface of the tank body 2. A water pump 6, a water outlet pipe 24 and a first switch key 9 are arranged in the second seat body 3, and the water pump 6 is communicated with the circulating water pipe 4. The first water inlet 5 of the water outlet pipe 24 is communicated with the cylinder body 2, and the first water outlet 8 of the water outlet pipe 24 is communicated with the outside; and the first switch key 9 is used for opening or closing the first water outlet 8.

In the in-service use process, make the water in the fish bowl can flow into outlet pipe 24 and discharge to the external world through first delivery port 8 through first water inlet 5 through the setting of outlet pipe 24, and simultaneously, make the water in the fish bowl have the power that flows in circulating pipe 4 through the setting of water pump 6, and spout towards 2 bottom surfaces of cylinder body through circulation mouth of a river 7, make rivers can wash 2 bottom surfaces of cylinder body, play the effort of stirring to the water of fish bowl bottom, be convenient for clear up the fish bowl bottom and can arrange the dirty east and west of fish bowl bottom to the external world, convenience of customers trades water to the fish bowl, improve user's experience and feel.

Specifically, the water inlet end of the pump body 6 is communicated with the cylinder body 2, so that the water flow in the cylinder body 2 has power flowing to the circulating water pipe 4, and a continuous source can be provided for the water flow flowing out from the circulating water port 7, and the circulation function of the water flow in the cylinder body 2 is realized. Meanwhile, the water inlet end of the pump body 6 is communicated with the first water inlet 5, so that water flow in the cylinder body 2 enters the circulating water pipe 4 through the first water inlet 5 and is sprayed out through the circulating water port 7, the bottom surface of the cylinder body 2 is washed by the water flow sprayed out from the circulating water port 7, the flushing action force is exerted on impurities and dirty objects attached to the bottom surface of the cylinder body 2, water with the impurities and the dirty objects can be sucked into the first water inlet 5 under the action of the water pump 6, and when the first water outlet 8 is opened by the first switch key 9, the impurities and the dirty objects can be discharged to the outside from the first water outlet 8, and the water changing work of the fish tank is realized.

Further, each of the circulating water gaps 7 is provided toward the first water inlet 5. Under the effect of water pump 6, the hydrologic cycle in circulating water pipe 4 flows, makes first water inlet 5 play the effect of suction to circulating water port 7 through seting up of circulating water port 7 for the water activity of fish bowl bottom is got up, is convenient for clear up the impurity in the fish bowl. And each circulating water gap 7 is arranged towards the direction of the first water inlet 5, so that the suction force of the first water inlet 5 to the circulating water gap 7 is further improved.

Further, the first water inlet 5 is located in the middle of the second seat 3, and the circulating water pipe 4 is disposed on the inner wall of the cylinder 2. Through setting up first water inlet 5 in the middle part position, locate circulating pipe 4 dish on the inner wall of cylinder body 2, be convenient for set up the circulation mouth of a river 7 on circulating pipe 4, can also guarantee simultaneously that first water inlet 5 is balanced to the suction of each circulation mouth of a river 7.

Optionally, the outer wall surface of the circulating water pipe 4 is fixedly connected with the inner wall surface of the cylinder 2, so that the reliability of the position of the circulating water pipe 4 is ensured.

Optionally, a clamping groove is formed in the cylinder body 2, and the circulating water pipe 4 is clamped in the clamping groove. Through setting up 4 joints of circulating pipe in cylinder body 2, be convenient for the fish bowl take out circulating pipe 4 or install in the use, be convenient for change or maintain circulating pipe 4.

Further, a baffle plate 10 is arranged in the cylinder body 2, the baffle plate 10 divides the cylinder body 2 into a first part 12 and a second part 13, and the second part 13 is communicated with the second seat body 3 through the first water inlet 5; the baffle 10 is provided with a plurality of overflowing holes 11, and the overflowing holes 11 are used for communicating the first part 12 with the second part 13. The baffle plate 10 is arranged to divide the tank body 2 into two parts, one part is used for living areas of fishes in the fish tank, the other part is used for placing parts for work, and the first part 12 and the second part 13 are communicated through the overflowing hole 11, so that the water flow activity is realized.

Alternatively, the baffle 10 may be vertically placed to divide the left and right portions of the cylinder body 2 into the first portion 12 and the second portion 13.

Similarly, the baffle 10 may be horizontally disposed to divide the upper and lower portions of the cylinder 2 into a first portion 12 and a second portion 13; the baffle 10 in this application is in a horizontal position. During the use process, a user can arrange stones or ornaments and the like on the baffle plate 10 according to the needs of the user or the functions of ornaments and the like. The diameter of the overflowing hole 11 should not be excessively large to satisfy the passage of water flow, foreign materials, dirt, etc. in the cylinder 2, and also to prevent the falling of ornaments such as stones.

Specifically, the circulating water pipe 4 is located in the second portion 13, the top of the circulating water pipe 4 abuts against the bottom of the baffle plate 10, and the position of the circulating water pipe 4 above and below can be further limited by the baffle plate 10.

Further, the section of the second part 13 in the height direction of the fish tank is conical, and the impurities in the second part 13 can slide to the first water inlet 5 through the inclined angle of the side wall through the conical arrangement, so that the impurities can be discharged conveniently.

Optionally, the first water inlet 5 is located at the conical top of the cone. Through setting up first water inlet 5 in the top of toper circular cone for first water inlet 5 is located the bottommost of second part 13, and the impurity that the event is located 13 lateral walls of second part all can flow to first water inlet 5 through the slope lateral wall, thereby can follow first delivery port 8 and discharge, and then improves the interior impurity exhaust effect of fish bowl, guarantees to trade the water effect.

Alternatively, the side wall of the second portion 13 may also be an arc-shaped wall surface which is concave or convex, and the arc-shaped wall surface can also guide the water flow flowing out of the water circulating port 7.

Further, the first seat body 1 comprises a concave base 14 and a cover plate 15, a pipeline 16 is communicated between the first water inlet 5 and the concave base 14, water flowing in from the first water inlet 5 can flow into the concave base 14 through the pipeline 16, and a second water outlet 17 communicated with the cylinder body 2 is further arranged on the concave base 14. Water in the tank body 2 flows through the first water inlet 5, the pipeline 16, the concave base 14 and the second water outlet 17 in sequence through the water pump 6, and water flowing out of the second water outlet 17 flows into the tank body 2 again, so that water circulation in the fish tank is realized. Specifically, the present application does not limit the specific arrangement positions of the water outlet end of the pipeline 16 and the second water outlet 17, so that the water flow can flow from the water outlet end of the pipeline 16 to the second water outlet 17 to realize water circulation.

Further, the water inlet end of the pipeline 16 is communicated with the first water inlet 5 through the water pump 6, the water pump 6 is provided with a second on-off key 23, and the second on-off key 23 has a first state communicating the first water inlet 5 with the circulating water pipe 4 and a second state communicating the first water inlet 5 with the pipeline 16. The second switch key 23 is switched to the first state, the water pump 6 is started to enable the water flow in the cylinder body 2 to flow into the circulating water pipe 4 through the first water inlet 5; the second switch 23 is switched to the second state, and the water pump 6 is turned on, so that the water in the cylinder 2 flows into the concave base 14 through the first water inlet 5 and the pipeline 16.

Specifically, the first switch key 9 and the second switch key 23 can be any one of the prior art to achieve the above purpose. The first on-off switch 9 and the second on-off switch 23 in the embodiment of the present application both adopt solenoid valves.

Referring to fig. 2 and 3, for example, the water outlet end of the pipeline 16 and the second water outlet 17 may be located at two opposite sides of the length direction or the width direction of the concave base 14, respectively. The concave base 14 is sequentially provided with a plurality of areas 20 between the water outlet end of the pipeline 16 and the second water outlet 17 through a partition plate 18, the partition plate 18 is provided with a plurality of through holes 19, and an adsorption piece for filtering impurities is arranged in each area 20. In the embodiment of the present disclosure, in the case shown in fig. 2, a straight line extending in the left-right direction in the drawing is the length direction of the concave base 14, a straight line extending in the up-down direction in the drawing is the height direction of the concave base 14, and an extending direction of a straight line perpendicular to both the length direction and the height direction of the concave base 14 is the width direction of the concave base 14.

In order to facilitate the arrangement of the partition 18, the water outlet end of the pipeline 16 and the second water outlet 17 may be located at two sides of the length direction of the concave base 14. Namely, one of the water outlet end of the pipeline 16 and the second water outlet 17 is located at the leftmost end of the concave base 14, the other one is located at the rightmost end of the concave base 14, the plurality of partition plates 18 are arranged from left to right at intervals to form a plurality of areas 20 arranged from left to right, and each area 20 from the water outlet section of the pipeline 16 to the second water outlet 17 is a first area, a second area, a third area, a fourth area and the like to the last area; therefore, the water flowing out from the water outlet end of the pipeline 16 flows through the first area, the second area and the like to the last area in sequence through the circulating hole 19, and the water flowing through each area 20 can be sequentially adsorbed and filtered through the arrangement of the adsorption piece from the second water outlet 17, so that the quality of the water in the cylinder 2 is improved.

Similarly, the water outlet end of the pipeline 16 and the second water outlet 17 may also be located at two sides of the width direction of the concave base 14, respectively, in order to reduce the overall volume of the concave base 14, a vertical plate 21 is disposed on the concave base 14, a U-shaped or serpentine water flow channel is formed on the concave base 14 through the vertical plate 21, and two ends of the water flow channel are respectively communicated with the water outlet end of the pipeline 16 and the second water outlet 17; a plurality of areas 20 are formed by a plurality of partition plates 18 at intervals in the water flow direction of the water flow channel, a plurality of through holes 19 are arranged on the partition plates 18, and an adsorption piece for filtering impurities is arranged in the area 20. The arrangement of the vertical plate 21 enables the water flow to flow on the concave base 14 in a bending manner, which not only meets the requirement of forming a plurality of areas 20 on the concave base 14, but also reduces the overall volume of the concave base 14.

It should be noted that, the position of the water outlet end of the pipeline 16 and the second water outlet 17 is not limited in the embodiments of the present disclosure. In the actual use process, a person skilled in the art can change the positions of the water outlet end of the pipeline 16 and the second water outlet 17 according to the arrangement requirement and the requirement of the actual machining size, and it should be noted that, in order to satisfy the circulation flow of the water flow, it is necessary to ensure that the water outlet end of the pipeline 16 is communicated with the first area and the second water outlet 17 is communicated with the last area.

For example, the vertical plate 21 in the present application extends along the length direction of the concave base 14, a U-shaped water flow channel is formed in the concave base 14 through the vertical plate 21, and the water flow at the water outlet end of the pipeline 16 sequentially flows to each region 20 through the U-shaped flow track and is discharged from the second water outlet 17 to the cylinder 2, so as to realize water circulation.

Specifically, the adsorption member in the first region is a filter screen, and macromolecular substances in water, such as fish feces, can be filtered through the filter screen. The absorption piece in the second region is filtering foam, and small molecular substances are filtered through the filtering foam. The adsorption element in the third area is activated carbon, and the water quality is further cleaned by adsorbing unfiltered impurities in the first two areas through the activated carbon. The fourth area is that the absorption piece in the last area is medicine stone, and medicine stone can release some mineral substance ions, improves quality of water. Similarly, the adsorbing member can also be selected from other substances having an adsorbing effect in the prior art to achieve the effect of adsorbing impurities and improving water quality, and the selection of the adsorbing member is only an alternative in the embodiment of the present application.

With reference to fig. 1 to 6, further, a vent hole 22 is disposed on the cover plate 15, and two ends of the vent hole 22 are respectively communicated with the outside and the second water outlet 17. Through the setting of the vent hole 22, the cylinder body 2 can be communicated with the outside through the vent hole 22, and the effect of adding oxygen to the water in the cylinder body 2 is achieved, so that the water in the cylinder body 2 is kept rich in oxygen.

The working principle of the water changing process of the embodiment of the disclosure is as follows: the first water outlet 8 is opened by the first switch key 9, so that the water in the fish tank flows into the water outlet pipe 24 from the first water inlet 5 and is discharged to the outside through the first water outlet 8, and part of the water in the fish tank can be discharged firstly. After a certain time is set, for example, one minute of water is drained outwards, part of the water at the bottom of the fish tank can be drained to the outside, and most of impurities in the fish tank are deposited at the bottom of the fish tank, so that the flowing of water flow can drive part of the impurities to move synchronously, and further the impurities are drained to the outside through the water outlet pipe 24. At this moment, the acting force of the water flow on the impurities attached to the bottom surface of the fish tank is small, so that the impurities attached to the bottom of the fish tank are difficult to drive to move, the water pump 6 is started, the second switch key 23 is adjusted to be in the first state, the water in the cylinder body 2 flows in through the first water inlet 5 and respectively flows into the circulating water pipe 4 and the water outlet pipe 24, the water in the circulating water pipe 4 flows out from the circulating water port 7 under the action of the water pump 6, the circulating water port 7 is sprayed towards the bottom surface of the cylinder body 2, so that the acting force for washing the bottom surface of the cylinder body 2 is exerted after the water flows out from the circulating water port 7, the impurities located at the bottom surface of the cylinder body 2 are washed, the impurities synchronously flow to the first water inlet 5 along with the flow of the water flow, and the water flow part flowing in from the first water inlet 5 is discharged to the outside through the water outlet pipe 24. After the water pump 6 is operated for a period of time, for example, after the water pump 6 is operated for one minute, the water pump 6 is turned off, so that all the water flowing from the first water inlet 5 is discharged to the outside through the water outlet pipe 24, in an operating state of the water pump 6, the impurities attached to the bottom surface of the cylinder 2 are washed by the water flow sprayed from the circulating water port 7, float in the water flow and can move synchronously with the flow of the water flow, and after the water pump 6 is turned off, the impurities floating in the water flow can be discharged through the first water outlet 8. If the bottom surface of the cylinder body 2 is still attached with impurities, the water pump 6 can be kept in an intermittent working state, so that the water flow sprayed out of the circulating water port 7 washes the bottom surface of the cylinder body 2, the impurities remained in the cylinder body 2 are cleaned until the impurities on the bottom surface of the cylinder body 2 are all discharged, and the water changing work of the fish tank is realized.

It should be noted that, the embodiments of the present disclosure do not limit each of the time nodes, and in the actual use process, a user may increase or decrease each of the time nodes according to the volume of water in the cylinder 2 and the amount of impurities in the cylinder 2.

The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications and changes to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A fish tank is characterized by comprising a first seat body (1), a tank body (2) and a second seat body (3) which are sequentially arranged, wherein a circulating water pipe (4) is arranged in the tank body (2), a plurality of circulating water openings (7) are formed in the circulating water pipe (4), and the circulating water openings (7) face to the bottom surface of the tank body (2) to spray water flow for washing the bottom surface of the tank body (2);

the second seat body (3) is internally provided with:

the water pump (6), the said water pump (6) communicates with said circulating water pipe (4);

the first water inlet (5) of the water outlet pipe (24) is communicated with the cylinder body (2), and the first water outlet (8) of the water outlet pipe (24) is communicated with the outside; and

a first switch key (9) for opening or closing the first water outlet (8).

2. A fish tank as claimed in claim 1, characterized in that each of the circulating water openings (7) is arranged towards the first water inlet (5).

3. A fish tank as claimed in claim 1, characterized in that the first water inlet (5) is located at the middle position of the second seat (3), and the circulating water pipe (4) is arranged on the inner wall of the tank body (2).

4. A fish tank as claimed in claim 1, characterized in that a baffle (10) is arranged in the tank body (2), the baffle (10) divides the tank body (2) into a first part (12) and a second part (13), and the second part (13) is communicated with the second seat body (3) through the first water inlet (5); the baffle plate (10) is provided with a plurality of overflowing holes (11), and the overflowing holes (11) are used for communicating the first part (12) with the second part (13).

5. A fish tank as claimed in claim 4, characterized in that the second part (13) is conical in cross-section in the direction of the height of the tank, the first water inlet (5) being located at the top of the cone.

6. A fish tank as claimed in any one of claims 1 to 5, characterized in that the first seat (1) comprises a concave base (14) and a cover plate (15), a pipeline (16) is communicated between the first water inlet (5) and the concave base (14), water flowing in from the first water inlet (5) can flow into the concave base (14) through the pipeline (16), and a second water outlet (17) communicated with the tank body (2) is further arranged on the concave base (14).

7. A fish tank as claimed in claim 6, characterized in that the water inlet end of the pipeline (16) is communicated with the first water inlet (5) through the water pump (6), a second on-off switch (23) is arranged on the water pump (6), and the second on-off switch (23) has a first state of communicating the first water inlet (5) with the circulating water pipe (4) and a second state of communicating the first water inlet (5) with the pipeline (16).

8. An aquarium according to claim 6, wherein the concave base (14) is sequentially provided with a plurality of areas (20) between the water outlet end of the pipeline (16) and the second water outlet (17) through a partition plate (18), the partition plate (18) is provided with a plurality of through holes (19), and an adsorption piece for filtering impurities is arranged in the area (20).

9. An aquarium according to claim 6, wherein the concave base (14) is provided with a U-shaped or snake-shaped water flow channel through a vertical plate (21), and two ends of the water flow channel are respectively communicated with the water outlet end of the pipeline (16) and the second water outlet (17); a plurality of areas (20) are formed by a plurality of partition plates (18) at intervals in the water flow direction of the water flow channel, a plurality of circulation holes (19) are formed in the partition plates (18), and adsorption pieces for filtering impurities are arranged in the areas (20).

10. A fish tank as claimed in claim 6, characterized in that the cover plate (15) is provided with a vent hole (22), and two ends of the vent hole (22) are respectively communicated with the outside and the second water outlet (17).

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