CN220123731U - Back filtering fish tank - Google Patents

Abstract

The utility model relates to a back filtering fish tank, which comprises a tank body and a fish tank filtering module, wherein a filtering flow passage is arranged in the fish tank filtering module, a filtering device and a fluid power device are arranged in the filtering flow passage, the back filtering fish tank also comprises a mounting substrate which is used for being attached to the inner wall of the tank body, a positioning piece is arranged on the mounting substrate, a positioning matching part is arranged at the lower part of the fish tank filtering module corresponding to the positioning piece, and the positioning is realized through the matching connection of the positioning matching part and the positioning piece; the fish tank filter module is characterized in that a cylinder cover assembly which is arranged on a cylinder opening of the cylinder body in a hinged manner is arranged on the fish tank filter module in a turnover manner, a lighting device which irradiates the cylinder body, a feeding device which feeds food into the cylinder body and a control button for controlling each device to start and stop are arranged on the cylinder cover assembly, and the bottom of the fish tank filter module is positioned and fixed through the cooperation of a positioning piece and a positioning matching part, so that the bottom of the fish tank filter module is prevented from swinging left and right or the gravity center is shifted when the cylinder cover assembly is opened, so that the bottom of the fish tank filter module is prevented from tilting upwards.

Description

Back filtering fish tank

Technical Field

The utility model relates to the field of aquaculture, in particular to a back filtering fish tank.

Background

Many families and companies are pursued quality of life, can breed ornamental fish in life, office area to increase life enjoyment, and the inside dead water that is of fish bowl needs to change the inside water of fish bowl for a period of time, because change water can cause extravagant, so the device that filters the inside water of fish bowl appears in the market, through take out through filtering to the inside water of fish bowl, filter the impurity in the water back in the fish bowl inside, clean the impurity in the water, prevent that bacterium in the water is too much from causing death to the inside fish of fish bowl.

The filtering device in the prior art is shown in a 'fish tank' structure with a patent number of CN202211115944.4, the filtering device clamped on the wall of the fish tank and a cover plate component connected to the filtering device are arranged in the fish tank, and the cover plate component is integrated with a light source, a feeding device, a touch control and a display and other structures, so that the weight of the cover plate component is large, after the cover plate component is opened, the gravity center of the filtering device is easily shifted to cause the situation that the bottom of the filtering device is tilted upwards and even the whole filtering device is turned out of the fish tank, and the like, and the current part of the filtering device is provided with elastic pieces on the left side and the right side of the filtering device, the filtering device is limited by interference fit, but the filtering device is provided with elastic pieces formed by silica gel or rubber, and the elastic pieces are tightly rubbed with the wall of the fish tank in the assembling and disassembling process, so that the filtering device is difficult and unsmooth to produce harsh noise during the rubbing, and the use experience of a user is influenced.

Disclosure of Invention

The utility model aims to solve the existing problems and provides a back filtering fish tank which is simple and reasonable in structure and has the main function of preventing the bottom of the fish tank filtering module from swinging left and right or tilting upwards.

The back filtering fish tank comprises a tank body and a fish tank filtering module arranged on the back wall of the tank body, wherein a filtering flow passage is arranged in the fish tank filtering module, a filtering device and a fluid power device are arranged in the filtering flow passage, a tank cover assembly which is arranged on a tank opening of the tank body in a covering manner is hinged to the fish tank filtering module in a turnover manner, and a lighting device which irradiates the tank body, a feeding device which feeds food into the tank body and a control button which controls the starting and stopping of each device are arranged on the tank cover assembly; the fish tank filter module is characterized by further comprising an installation base body attached to the inner wall of the cylinder body, wherein a positioning piece is arranged on the installation base body, the lower part of the fish tank filter module is provided with a positioning matching part corresponding to the positioning piece, and the fish tank filter module is matched and connected with the positioning piece through the positioning matching part to realize positioning.

The aim of the utility model can be also solved by adopting the following technical measures:

as a more specific scheme, be equipped with water inlet and the delivery port of intercommunication filtration runner on the fish bowl filtration module, the bottom of cylinder body inner chamber still is provided with end filtration module, be equipped with advection filter chamber in the end filtration module, the water inlet passes through water channel and advection filter chamber intercommunication.

As a further proposal, the bottom filter module comprises a bottom filter plate with a plurality of water permeable holes, and the bottom filter plate is arranged on the cylinder bottom at intervals and forms a advection filter cavity between the bottom filter plate and the cylinder bottom.

As a further scheme, the locating piece includes the shell fragment, the shell fragment is crooked in the middle part and is formed a locating end and a free end, the locating end is connected on the installation base member, the free end elasticity of shell fragment supports and holds on location cooperation portion to with location cooperation portion location centre gripping between shell fragment and cylinder wall.

As a further scheme, the positioning matching part comprises a positioning concave cavity formed by upwardly and inwardly concave the bottom surface of the fish tank filtering module, the opening of the positioning concave cavity is downward, at least the part of the height of the free end of the elastic sheet can be accommodated and the width of the elastic sheet is adapted, and the free end of the elastic sheet is elastically propped against the outer cavity wall of the positioning concave cavity.

As a further scheme, the mounting base body comprises an adhesive base plate clamping piece, wherein the back side of the adhesive base plate clamping piece is provided with an attaching structure and is horizontally adhered to the inner bottom wall of the cylinder body through the attaching structure; the front side of the spring plate is provided with a slot and a buckling lug arranged below the slot, the positioning end of the spring plate is inserted into the slot, and the positioning end is correspondingly provided with a buckling opening buckled and positioned with the buckling lug; the attachment structure comprises an adhesive layer or a suction cup.

As a further scheme, an upper water inlet and a lower water inlet which are communicated with a filtering runner are formed in the fish tank filtering module, a filter plate is detachably connected to the lower water inlet, a guide cover which covers the lower water inlet b is correspondingly arranged on the bottom filter plate, a water passing channel is formed in the inner cavity of the guide cover, the water inlet end of the water passing channel is communicated with the advection filtering cavity, and the water outlet end of the water passing channel is correspondingly communicated with the lower water inlet b.

As a further scheme, a plurality of water outlets which are arranged at different heights and are communicated with the filtering flow passage are formed in the fish tank filtering module, and water blocking covers for adjusting the size of the water outlets are connected to at least part of the water outlets in a sliding manner.

As a further scheme, the upper part of the fish tank filtering module is provided with a supporting step surface on the side wall close to the tank body, and the fish tank filtering module is placed on the tank top edge of the tank body through the supporting step surface to realize installation and fixation.

As a further scheme, the fluid power device comprises a device shell, a water inlet cavity communicated with a water inlet is arranged in the device shell, a water pump is arranged in the water inlet cavity, a longitudinal pipe section and a transverse pipe section are connected to the water outlet end of the water pump, and a plurality of water outlet holes are formed in the transverse pipe section along the length direction of the transverse pipe section; the filtering device comprises a plurality of filter element modules arranged below the transverse pipe section, the water inlet ends of the filter element modules are arranged at the top and correspond to the water outlet holes, and the water outlet ends of the filter element modules are arranged at the bottom and communicated with the water outlet.

The beneficial effects of the utility model are as follows:

(1) According to the back filtering fish tank, in the assembling and disassembling process, the fish tank filtering module is not affected by a traditional fixing structure, the assembling and disassembling are smooth and convenient, the structure is simple, when the gravity center of the fish tank filtering module is deviated, the bottom of the filtering tank can be fixed in a positioning way through the matching of the positioning piece and the positioning matching part, the bottom of the fish tank filtering module is prevented from swinging left and right or tilting upwards, the lighting function and the feeding function are integrated on the tank cover assembly, the tank cover assembly has the multifunctional characteristics, and the back filtering fish tank is more compact and convenient to assemble and disassemble.

(2) When the bottom filter module of the structure is used, water in the advection filter cavity is sucked through the water inlet, after negative pressure is formed in the advection filter cavity, water in the inner cavity of the cylinder body flows downwards, then the water is filtered through the filter layer arranged on the bottom filter plate, the water passes through the water permeable holes and then enters the advection filter cavity, and finally the water is discharged to the cylinder body again through the water outlets with different heights.

(3) The lower part of the fish tank filter module is positioned through the fixing structure, so that the lower water inlet at the bottom of the fish tank filter module can be stably in butt joint with the guide cover on the bottom filter module, the lower water inlet can specifically extract water in the advection filter cavity, and water in the tank flows downwards.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model.

Fig. 2 is a schematic cross-sectional view of a bottom filter module according to the present utility model.

Fig. 3 is a schematic view of the bottom surface structure of the cylinder head assembly of the present utility model.

Fig. 4 is a schematic sectional partial structure of the present utility model.

Fig. 5 is a schematic diagram of an exploded structure of the adhesive base plate clip and the elastic sheet according to the present utility model.

Fig. 6 is a schematic diagram of an exploded structure of the aquarium filter module and the bottom filter plate of the present utility model.

Fig. 7 is a schematic diagram of an exploded structure of the bottom filter plate and the pod of the present utility model.

Fig. 8 is a schematic view of the supporting step surface structure of the present utility model.

Fig. 9 is a schematic diagram of a cross section and an exploded structure of the aquarium filter module of the present utility model.

FIG. 10 is a schematic cross-sectional view of a feeding device according to the present utility model.

FIG. 11 is an exploded view of the feeding device of the present utility model.

Detailed Description

The utility model will be further described with reference to the drawings and examples.

As shown in fig. 1 to 9, a back filtering fish tank comprises a tank body 1 and a fish tank filtering module 2 arranged on the back wall of the tank body 1, wherein a filtering flow passage 204 is arranged in the fish tank filtering module 2, a filtering device 11 and a fluid power device 12 are arranged in the filtering flow passage 204, a tank cover assembly 5 which is arranged on a tank opening of the tank body 1 in a hinged manner is arranged on the fish tank filtering module 2 in a turnover manner, and a lighting device 25 which irradiates the tank body 1, a feeding device 27 which feeds food into the tank body 1 and a control button 24 which controls the starting and stopping of each device are arranged on the tank cover assembly 5; the fish tank filter module is characterized by further comprising an installation base body attached to the inner wall of the cylinder body 1, wherein a positioning piece is arranged on the installation base body, a positioning matching part is arranged at the lower part of the fish tank filter module 2 corresponding to the positioning piece, and the fish tank filter module is matched and connected with the positioning piece through the positioning matching part to realize positioning.

The lighting function and the feeding function are integrated on the cylinder cover assembly 5, so that the cylinder cover assembly 5 has the multifunctional characteristic, the back filtering fish tank is more compact and convenient to assemble and disassemble, the control button 24 mainly controls the operation of the fluid power device 12 and the lighting device 25, the feeding device 27 is an automatic feeding device or a manual feeding device depending on whether the automatic feeding device or not is adopted, and when the feeding device 27 is an automatic feeding device, the control button 24 can also control the operation of the feeding device 27.

And, this kind of fish bowl filtration module is in the installation and removal in-process, does not receive traditional fixed knot and constructs the influence, and the dismouting is smooth and easy, convenient, simple structure, when back of the body filters and opens and lead to fish bowl filtration module 2 to appear the focus skew, can fix a position the bottom of fish bowl filtration module 2 through the cooperation of setting element and location cooperation portion, prevents that the bottom of fish bowl filtration module 2 from appearing the horizontal hunting or upwards perk.

In addition, a control circuit board is disposed in the cylinder cover assembly 5, the control circuit board is connected with each device and the control button 24, the control button 24 is disposed at a position near the front side of the top surface of the cylinder cover assembly 5, a display screen 28 is further disposed at the front end side of the cylinder cover assembly 5, the display screen 28 can display various information, such as information of working state, water quality index, water temperature, etc., the lighting device 25 mainly comprises a lamp board connected with the control circuit board, the lamp board is mounted on the bottom surface of the cylinder cover assembly 5 and irradiates the inner cavity of the cylinder body, the control button 24 can be utilized to set feeding time, the control circuit board is utilized to drive the feeding device 27 to automatically feed, and an air vent 51 communicated with the inner cavity of the cylinder body 1 is disposed between the feeding device 27 and the cylinder cover assembly 5; since the cylinder head assembly 5 completely covers the cylinder port, helping to prevent fish from jumping out of the cylinder, it is necessary to provide the ventilation port 51 to facilitate exchange of air in the cylinder with the outside.

The feeding device 27 is shown with reference to fig. 10 and 11, and specifically comprises a storage vat 271, wherein a barrel cover 272 for feeding is arranged on an upper opening movable cover of the storage vat 271, the bottom surface of the storage vat 271 is in a conical structure, a discharge hole 2711 is formed at the lowest point of the conical structure, a discharge hole baffle 273 is arranged at the bottom of the storage vat 271, a discharge slide plate 274 capable of sliding in a translation manner is arranged between the discharge hole baffle 273 and the storage vat 271, and a guide rail 275 for guiding the discharge slide plate 274 to slide in a straight line is arranged at the bottom of the storage vat 271;

and the one end of ejection of compact slide 274 is offered and is formed the discharge channel 2741 with discharge gate 2711 intercommunication, discharge channel 2741 and the cooperation of discharge gate baffle 273 form the graduated flask, and fixedly connected with motor 276 on the discharge gate baffle 273, be connected with eccentric pendulum 277 on the output shaft of motor 276, the holding mouth 2742 of holding eccentric pendulum 277 has been offered to the other end of ejection of compact slide 274, when feeding, thereby the motor 276 makes eccentric pendulum 277 rotate drive ejection of compact slide 274 reciprocating slip, when forming the graduated flask, the fish material in the storage vat 271 falls into discharge channel 2741, when discharge channel 2741 is pushed away from discharge gate baffle 273, the fish material falls into the fish bowl from discharge channel 2741 bottom opening, can set for the reciprocal number of times of ejection of compact slide 274 according to the number of feeding.

The fish tank filter module 2 is provided with a water inlet 201 and a water outlet 202 which are communicated with a filter runner 204, the bottom of the inner cavity of the cylinder body 1 is also provided with a bottom filter module 3, a advection filter cavity 4 is arranged in the bottom filter module 3, and the water inlet 201 is communicated with the advection filter cavity 4 through a water channel 601.

The bottom filter module 3 comprises a bottom filter plate 31 with a plurality of water permeable holes 301, the bottom filter plate 31 is arranged on the cylinder bottom at intervals to form a advection filter cavity 4, and a filter layer is arranged above the bottom filter plate 31 when in use.

When the bottom filtering module 3 of the structure is used, water in the advection filtering cavity 4 is sucked through the water inlet 201, so that after negative pressure is formed in the advection filtering cavity 4, the water in the inner cavity of the cylinder body 1 flows downwards, then passes through the filtering layer arranged on the bottom filtering plate to realize filtering, then passes through the water permeable holes and enters the advection filtering cavity, and finally is discharged from the upper part of the cylinder body 1 through the water outlet 202.

The water permeable holes 301 are uniformly distributed on the whole bottom filter plate 31 in a matrix; the filtering area of the bottom filter plate 31 is allowed to cover the entire cylinder bottom.

The bottom filter plate 31 is detachably arranged on the cylinder bottom; the bottom filter plate 31 can be detached, so that a user can conveniently and independently clean the fish tank and the bottom filter plate 31, and dirt is prevented from accumulating at the bottom of the fish tank; and allows the user to selectively install the bottom filtering module 3 so that the water in the cylinder 1 is bottom filtered and/or side filtered.

The positioning piece comprises a spring piece 7, the spring piece 7 is bent at the middle part to form a positioning end 71 and a free end 72, the positioning end 71 is connected to the mounting base body, the free end 72 of the spring piece 7 elastically abuts against the positioning matching part, and the positioning matching part is positioned and clamped between the spring piece 7 and the cylinder wall; the structure is easy to assemble by positioning the bottom of the fish tank filtering module 2 through the elastic sheet 7 and is simple to operate by fixing the elastic automatic clamping and positioning matching part of the elastic sheet 7.

The positioning matching part comprises a positioning concave cavity 203 which is formed by upwardly and inwardly concave from the bottom surface of the fish tank filter module 2, the opening of the positioning concave cavity 203 is downward, at least part of the height of the free end 72 of the elastic sheet 7 can be accommodated and the width of the elastic sheet 7 can be adapted, and the free end 72 of the elastic sheet 7 is elastically propped against the outer cavity wall of the positioning concave cavity 203; the width of the positioning concave cavity 203 is equal to or slightly larger than the width of the free end 72 of the elastic sheet 7, when the positioning concave cavity 203 is sleeved on the free end 72 of the elastic sheet 7, the bottom of the fish tank filter module 2 can be prevented from swinging left and right, the free end 72 of the elastic sheet 7 is propped against the wall of the outer cavity, and meanwhile, the bottom of the fish tank filter module 2 can be prevented from tilting upwards.

The installation base body is provided with an attaching structure including a base plate sticking clamping piece 8, when the depth of the fish tank is equal to or smaller than the height of the fish tank filtering module 2, the installation base body can adopt the base plate sticking clamping piece 8, the base plate sticking clamping piece 8 is horizontally stuck on the bottom wall A1 in the fish tank, moreover, a step surface 205 is concavely arranged at the cavity opening of the positioning cavity 203, the base plate sticking clamping piece 8 can be accommodated on the step surface 205 in an adapting manner, so that the bottom surface of the filtering box 21 is provided with a space accommodating manner even after the bottom surface of the fish tank is touched, and the base plate sticking clamping piece 8 is flush with the bottom surface of the fish tank filtering module 2.

The attaching structure comprises an adhesive layer 10 or a sucker, and the adhesive plate clamping piece 8 can be adhered to the cylinder wall through the adhesive layer 10 or the sucker.

The front side of the sticking bottom plate clamping piece 8 is provided with a slot 81 and a buckling projection 82 arranged below the slot 81, the positioning end 71 of the elastic sheet 7 is inserted into the slot 81, and the positioning end 71 is correspondingly provided with a buckling opening 711 buckled and positioned with the buckling projection 82; the engagement of the fastening projection 82 with the fastening opening 711 can fix the positioning end 71 of the spring 7.

The free end 72 of the spring 7 comprises an elastic piece 721 bent outwards and a guide piece 722 bent inwards, the elastic piece 721 and the guide piece 722 form a V-shaped structure, and a joint between the elastic piece 721 and the guide piece 722 forms a supporting point 73 which is supported on the filter box 21; the abutment point 73 can reduce the contact area between the elastic sheet 7 and the filter tank 21, and reduce friction, and the guide piece 722 helps to spread the elastic sheet 7 when the wall of the filter tank 21 is mounted on the fish tank, so that the wall cuts into the space between the elastic sheet 7 and the tank wall, and the free end of the elastic sheet 7 is inserted into the positioning cavity 203.

An upper water inlet 201a and a lower water inlet 201b which are communicated with a filtering flow passage are formed in the fish tank filtering module 2, in the embodiment, the upper water inlet 201a and the lower water inlet 201b are correspondingly arranged on the right side of the fish tank filtering module 2 up and down, a water outlet 202 is formed on the left side of the fish tank filtering module 2, the upper water inlet 201a is directly communicated with the inner cavity of the tank body, and a filtering flow passage 204 which transversely flows is formed in the fish tank filtering module 2 between the upper water inlet 201a, the lower water inlet 201b and the water outlet 202;

the lower water inlet 201b is detachably connected with a filter plate 13; the filter plate 13 can prevent impurities participating in the advection filter cavity 4 from entering the hydrodynamic device 12 through the lower water inlet 201 b;

because the impurities in the water mainly settle at the bottom of the cylinder body or float on the water surface, the water inlet is divided into an upper water inlet 201a and a lower water inlet 201b which correspond to the cylinder bottom and the water surface respectively, the upper water inlet 201a can directly suck the impurities on the water surface, and the lower water inlet 201b is specially used for sucking the water in the advection filter cavity 4, so that the water in the cylinder body 1 flows downwards and is adsorbed or filtered by the filter layer at the bottom, and the filtering effect is improved;

the bottom filter plate 31 is correspondingly provided with a guide cover 6 covering the lower water inlet 201b, the inner cavity of the guide cover 6 forms a water passing channel 601, the water inlet end of the water passing channel 601 is communicated with the advection filter cavity 4, and the water outlet end of the water passing channel 601 is correspondingly communicated with the lower water inlet 201 b; the lower water inlet 201b can only be communicated with the advection filter cavity 4 through the water passage 601 by guiding the air guide cover 6.

An opening 302 which is communicated with the advection filter cavity 4 is formed in the bottom filter plate 31 and close to the lower water inlet 201b, a buckling part 602 is arranged at the bottom of the air guide sleeve 6, and the air guide sleeve 6 is detachably buckled above the opening 302 through the buckling part 602; the diversion cover 6 is detachable, mainly if the horizontal flow filter cavity 4 is blocked by water inflow, only a small piece structure of the diversion cover 6 can be detached, the diversion cover is not required to be taken off integrally, and the whole cylinder is not required to be turned over; and be convenient for wash the inner wall of kuppe 6, can open lower water inlet 201b as required, make lower water inlet 201b direct and cylinder body 1 inner chamber intercommunication.

In this embodiment, the fastening portion 602 includes a limiting substrate extending downward, and a fastening protrusion fastened under the bottom filter plate 31 is disposed on the outer side of the limiting substrate.

The lower water inlet 201b is arranged on the fish tank filter module 2 by the side edge, and the guide cover 6 is arranged at the joint corner among the bottom filter plate 31, the fish tank filter module 2 and the tank wall; the air guide sleeve 6 is arranged at the joint corner, so that the shielding of the biological swimming path in the cylinder can be reduced, and the space in the cylinder is more regular.

The shape of the bottom filter plate 31 is matched with the shape of the cylinder bottom, the periphery of the bottom filter plate 31 is extended downwards to form a supporting retaining wall 311, and a plurality of supporting feet 312 which are aligned with the supporting retaining wall 311 are uniformly distributed on the bottom surface of the bottom filter plate 31; the bottom filter plate 31 can be arranged on the cylinder bottom at intervals through the supporting retaining wall 303 and the supporting legs 304, the strength of the bottom filter plate 31 can be improved through the supporting retaining wall 303, the supporting legs 304 can disperse the pressure in the middle of the bottom filter plate 31, and the collapse and the pressure loss in the middle of the bottom filter plate 31 caused by the weight of the filter layer are avoided.

The fish tank filter module 2 is provided with a plurality of water outlets 202 which are arranged at different heights and are communicated with the filter flow passage, and at least part of the water outlets 202 are connected with a water blocking cover 14 for adjusting the size of the water outlets 202 in a sliding way;

the water retaining cover 14 is provided with a small handle which is convenient for a user to operate, the water retaining cover 14 is helpful for the user to slide, the water outlet of the water outlet 202 is mainly adjusted by the small handle, the lower water retaining cover 14 can be opened, water is discharged from the lower water outlet 202, or the lower water retaining cover 14 is closed, water is discharged from the upper water outlet 202, and water can be discharged from each water outlet 202, so that the water is slow;

the fish tank filter module 2 is arranged on the cylinder body 1 through the support step surface 206, the fish tank filter module 2 is convenient to install and detach, and the side wall, close to the cylinder body 1, of the upper portion of the fish tank filter module 2 is provided with the support step surface 206, the fish tank filter module 2 is arranged on the cylinder top edge of the cylinder body 1 through the support step surface 206, so that the fish tank filter module 2 can be conveniently installed and detached, and the side wall, close to the cylinder body 1, of the support step surface 206 is beneficial to limiting the side-to-side swing or upward tilting of the fish tank filter module 2.

The fluid power device 12 comprises a device housing 121, a water inlet cavity 122 communicated with a water inlet 201 is arranged in the device housing 121, a water pump 123 is arranged in the water inlet cavity 122, a water outlet end of the water pump 123 is connected with a longitudinal pipe section 124 and a transverse pipe section 125, and a plurality of water outlet holes 1251 are formed in the transverse pipe section 125 along the length direction; the water pump 123 pumps water in the water inlet cavity 122 into the filtering device 11 from top to bottom after passing through the longitudinal pipe section 124 and the transverse pipe section 125;

the filtering device 11 comprises a plurality of filtering core modules 111 arranged below the horizontal pipe section, the water inlet ends of the filtering core modules 111 are arranged at the top and correspond to the water outlet holes 1251, the water outlet ends of the filtering core modules 111 are arranged at the bottom and are communicated with the water outlet 202, each filtering core module 111 comprises a multi-layer filtering structure, water containing impurities automatically flows downwards after being sprayed into the water inlet ends of the filtering core modules from the water outlet holes 1251, is filtered by the multi-layer filtering structure, is finally discharged from the bottom of the filtering core modules, and finally flows back to the inner cavity of the cylinder body 1 again through a plurality of water outlets with different heights.

The front side wall of the fish tank filter module 2 is provided with an L-shaped hinge lug 29, the bottom surface of the cylinder cover assembly 5 is correspondingly provided with an L-shaped hinge groove 30, and the cylinder cover assembly 5 is matched with the L-shaped hinge lug 29 through the L-shaped hinge groove 30 and is hinged to the fish tank filter module 2 in a turnover manner.

The fish tank filter module 2 comprises a module shell 2-1, two partition plates 2-2 are vertically arranged in the module shell 2-1, the two partition plates 2-2 divide the inner cavity of the module shell 2-1 into a first accommodating cavity 2-3, a second accommodating cavity 2-4 and a third accommodating cavity 2-5, a communicating opening 2-6 is formed in the top of the partition plate 2-2 between the first accommodating cavity 2-3 and the second accommodating cavity 2-4, and an upper communicating opening 2-7 and a lower communicating opening 2-8 are respectively formed in the top and the bottom of the partition plate 2-2 between the second accommodating cavity 2-4 and the third accommodating cavity 2-5.

Wherein the fluid power device 12 is arranged in the first accommodating cavity 2-3, and the upper water inlet 201a and the lower water inlet 201b are arranged at the positions of the module shell 2-1 corresponding to the first accommodating cavity 2-3; the filter device 11 is arranged in the second accommodating cavity 2-4, and the water outlet end at the bottom of the filter element module 111 is communicated with the lower communication port 2-8; the water outlets 202 with different heights are arranged at the positions of the module shell 2-1 corresponding to the third accommodating cavity 2-5, and the upper communication ports 2-7 are higher than the water outlets 202.

The foregoing is a preferred embodiment of the utility model showing and describing the general principles, features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the foregoing embodiments, which have been described in the foregoing embodiments and description merely illustrates the principles of the utility model, and various changes and modifications may be made therein without departing from the spirit and scope of the utility model as defined in the appended claims and their equivalents.

Claims (10)

1. The back filtering fish tank comprises a tank body (1) and a fish tank filtering module (2) arranged on the back wall of the tank body (1), wherein a filtering flow passage (204) is arranged in the fish tank filtering module (2), and a filtering device (11) and a fluid power device (12) are arranged in the filtering flow passage (204); the fish tank filter module is characterized by further comprising an installation base body attached to the inner wall of the cylinder body (1), wherein a positioning piece is arranged on the installation base body, the lower part of the fish tank filter module (2) is provided with a positioning matching part corresponding to the positioning piece, and the fish tank filter module is matched and connected with the positioning piece through the positioning matching part to realize positioning.

2. A back-filtering fish tank as in claim 1, wherein the fish tank filtering module (2) is provided with a water inlet (201) and a water outlet (202) which are communicated with a filtering runner (204), the bottom of the inner cavity of the tank body (1) is also provided with a bottom filtering module (3), a advection filtering cavity (4) is arranged in the bottom filtering module (3), and the water inlet (201) is communicated with the advection filtering cavity (4) through a water passage (601).

3. A backfilter aquarium according to claim 2 characterized in that the bottom filter module (3) comprises a bottom filter plate (31) with a plurality of water permeable perforations (301), the bottom filter plate (31) being spaced on the bottom of the aquarium and forming a advection filter chamber (4) therebetween.

4. A backfilter aquarium according to claim 1 characterized in that the positioning element comprises a spring (7), the spring (7) is bent in the middle to form a positioning end (71) and a free end (72), the positioning end (71) is connected to the mounting base, the free end (72) of the spring (7) is elastically held against the positioning mating portion and positions the positioning mating portion between the spring (7) and the aquarium wall.

5. A back-filtering aquarium as defined in claim 4 wherein the positioning mating part comprises a positioning cavity (203) formed by upwardly and inwardly concavely forming the bottom surface of the aquarium filtering module (2), the positioning cavity (203) is downward opened and can accommodate at least a part of the height of the free end (72) of the spring plate (7) and the width of the spring plate (7), and the free end (72) of the spring plate (7) is elastically abutted against the outer cavity wall of the positioning cavity (203).

6. A backfilter fish tank as claimed in claim 5, characterized in that the mounting base comprises an adhesive base plate clip (8) with an attachment structure on the back side and horizontally adhered to the inner bottom wall (A1) of the tank body by the attachment structure; the front side of the spring plate is provided with a slot (81) and a buckling lug (82) arranged below the slot (81), the positioning end (71) of the spring plate (7) is inserted into the slot (81), and the positioning end (71) is correspondingly provided with a buckling opening (711) buckled and positioned with the buckling lug (82); the attachment structure comprises an adhesive layer (10) or a suction cup.

7. A back filtering fish tank as defined in claim 3, wherein the fish tank filtering module (2) is provided with an upper water inlet (201 a) and a lower water inlet (201 b) which are communicated with a filtering flow passage, the lower water inlet (201 b) is detachably connected with a filter plate (13), the bottom filter plate (31) is correspondingly provided with a guide cover (6) covering the lower water inlet (201 b), the inner cavity of the guide cover (6) forms a water passing channel (601), the water inlet end of the water passing channel (601) is communicated with a advection filtering cavity (4), and the water outlet end of the water passing channel (601) is correspondingly communicated with the lower water inlet (201 b).

8. A back-filtering aquarium as defined in claim 2, wherein the aquarium filter module (2) is provided with a plurality of water outlets (202) which are arranged at different heights and are communicated with the filter flow passage, and at least part of the water outlets (202) are slidably connected with water blocking covers (14) for adjusting the size of the water outlets (202).

9. A back filtering fish tank as in claim 1, wherein the upper part of the fish tank filtering module (2) is provided with a supporting step surface (206) on the side wall close to the tank body (1), and the fish tank filtering module (2) is placed on the tank top edge of the tank body (1) through the supporting step surface (206) to realize installation and fixation.

10. A back-filtering aquarium according to claim 2 characterized in that the hydrodynamic device (12) comprises a device housing (121), a water inlet cavity (122) communicated with a water inlet (201) is arranged in the device housing (121), a water pump (123) is arranged in the water inlet cavity (122), a longitudinal pipe section (124) and a transverse pipe section (125) are connected to the water outlet end of the water pump (123), and a plurality of water outlet holes (1251) are formed in the transverse pipe section (125) along the length direction; the filtering device (11) comprises a plurality of filtering core modules (111) arranged below the transverse pipe section, the water inlet ends of the filtering core modules (111) are arranged at the top and correspond to the water outlet holes (1251), and the water outlet ends of the filtering core modules (111) are arranged at the bottom and are communicated with the water outlet (202).