A top-mounted filter device for fish tanks

Abstract

This utility model discloses a top-mounted filter device for aquariums, including a filter box body connected to the aquarium via a connecting mechanism. The filter box body is characterized by having an inlet chamber, a sedimentation chamber, and a filter chamber arranged sequentially along the water flow direction. A water pump is installed in the inlet chamber. A water baffle is installed between the sedimentation chamber and the filter chamber, with an overflow port on the baffle to allow the sedimentation chamber to connect to the filter chamber via top overflow. The sedimentation chamber is also connected to a drain pipe. The filter chamber contains multiple filter plate units for supporting filter cotton. A deluge pipe is also installed on the filter box body and connected to the filter chamber. The advantages are that it enables pre-separation of large particles of dirt, reduces the load on the filter media, extends the service life of the filter media, facilitates cleaning and maintenance, and improves overall filtration efficiency.

Description

Technical Field

[0001] This utility model relates to a filtration device, and more particularly to a top-mounted filtration device for aquariums. Background Technology

[0002] Aquarium filtration systems are the core equipment in aquarium systems, playing a crucial role in maintaining stable water quality and fish health. With the rapid development of the ornamental fish farming industry and the improvement of people's living standards, home aquariums have become an important part of indoor decoration and leisure activities. High-efficiency filtration systems not only remove pollutants such as suspended particles, fish feces, and food residue from the water, but also degrade harmful ammonia nitrogen through biological filtration, providing a clean and healthy living environment for fish while reducing the frequency of water changes and lowering maintenance costs.

[0003] Existing aquarium filtration systems are mainly divided into several types, including bottom filters, back filters, side filters, and top filters. Among them, top filters are widely used due to their ease of installation and space-saving design. Traditional top filters typically employ a multi-layered filtration structure, including physical and biological filtration layers. A water pump draws water from the aquarium into the filter box, where it is filtered by the filter media before flowing back into the aquarium. This design, through the combination of different functional filter media, effectively removes pollutants from the water. Most top filters directly deliver raw water containing a large amount of impurities to the filter media layer for filtration.

[0004] However, existing top-mounted filters generally suffer from excessive filter media load. Lacking a pre-sedimentation stage, raw water containing large particles of fish feces, uneaten food, and other debris directly impacts the filter media. These particles quickly accumulate on the media surface, forming a fouling layer. This not only severely reduces the filtration efficiency but also necessitates frequent cleaning or replacement of the media, increasing maintenance costs and workload. Another critical issue is that the accumulation of debris in the filter media leads to anaerobic decomposition, producing harmful ammonia nitrogen compounds. These harmful substances continuously circulate with the water flow, further exacerbating water quality deterioration. Furthermore, when large particles directly enter the biological filter media area, they occupy the attachment space of nitrifying bacteria, affecting the biological filtration effect and disrupting the ecological balance of the aquatic body.

[0005] Therefore, developing a new type of top-mounted aquarium filter that can effectively separate large particles of dirt before filtration and reduce the burden on the filter media has important practical value. Summary of the Invention

[0006] The purpose of this invention is to provide a top-mounted filter device for aquariums, which can pre-separate large particles of dirt, reduce the load on the filter media, extend the service life of the filter media, and facilitate cleaning and maintenance, thereby improving the overall filtration efficiency.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a top-mounted filter device for a fish tank, comprising a filter box body, which is connected to the fish tank via a connecting mechanism. Inside the filter box body, along the water flow direction, are sequentially arranged a water inlet chamber, a sedimentation chamber, and a filter chamber. A water pump is installed in the water inlet chamber. A water baffle is installed between the sedimentation chamber and the filter chamber. An overflow port is formed on the water baffle, allowing the sedimentation chamber to connect to the filter chamber via top overflow. The sedimentation chamber is also connected to a drain pipe. Multiple filter plate units for supporting filter cotton are installed inside the filter chamber. A rain shower pipe is also installed on the filter box body, and the rain shower pipe is connected to the filter chamber.

[0008] Preferably, the filter plate unit includes a bracket and a partition, the bracket and the partition are detachably connected, and an installation space for accommodating filter cotton is formed between the bracket and the partition. A water-permeable window is provided on the upper part of one side of the bracket, and a closed water-blocking part is provided on the lower part. Multiple water-permeable holes are evenly distributed on the partition.

[0009] Preferably, the bracket is provided with a handle at the top, the partition is provided with guide strips on both sides, and the filter chamber is provided with guide grooves on both inner walls, and the guide strips are slidably inserted into the guide grooves.

[0010] Preferably, the edge of the partition is provided with a claw, and the corresponding position of the bracket is provided with a snap-fit ​​protrusion. The claw and the snap-fit ​​protrusion cooperate to realize the detachable connection between the partition and the bracket.

[0011] Preferably, the bottom of the water inlet chamber is detachably connected to an extended splicing box, and the upper two side walls of the extended splicing box are provided with outwardly extending snap-fit ​​flanges. The side walls of the water inlet chamber are provided with corresponding snap-fit ​​grooves. The snap-fit ​​flanges and the snap-fit ​​grooves are detachably connected by snap-fit. The bottom of the extended splicing box is also provided with a water inlet.

[0012] Preferably, the rain pipe has a flat box structure, including an inlet chamber and an outlet chamber that are interconnected. The rain pipe is horizontally fixed to the side wall of the filter box and extends to the top of the filter chamber. The inlet chamber is connected to the filter chamber. The bottom surface of the outlet chamber has multiple rain holes that are arranged in an array.

[0013] Preferably, the sewage pipe includes a pipe body and a connecting joint. The connecting joint is fixedly disposed on the bottom wall of the sedimentation tank. One end of the pipe body is connected to the connecting joint, and the other end of the pipe body is provided with a connecting cap. A clip is fixed on the connecting cap, and a hanging plate for the clip to be engaged is fixed on the side wall of the filter box.

[0014] Preferably, a guiding space is formed between the side wall of the filter chamber and the side wall of the filter box body. The lower part of the guiding space is connected to the sedimentation chamber, and the upper part is connected to the filter chamber. The bottom of the sedimentation chamber is provided with a sloping bottom plate. The outlet of the water pump is connected to an outlet pipe. The outlet pipe extends upward and passes through the sloping bottom plate before entering the guiding space. The end of the outlet pipe is located in the guiding space and is fixed with a rain shower component. The bottom of the rain shower component is provided with multiple dispersion holes.

[0015] Preferably, the connecting mechanism includes a hook bracket, which is disposed on the upper back of the filter box. The hook bracket includes a mounting plate fixedly connected to the back wall of the filter box and a hook portion extending outward from the mounting plate and bent downward to form a hook portion for hanging on the upper edge of the aquarium wall.

[0016] Preferably, the top of the filter housing is provided with a removable top cover.

[0017] Compared with existing technologies, the advantages of this invention are as follows: During operation, the water pump draws raw water containing fish feces, uneaten food, and other waste from the bottom of the aquarium into the inlet chamber, and then transports it to the sedimentation chamber. In the sedimentation chamber, large particles of waste naturally settle due to gravity, achieving the first line of defense in physical separation. This pre-sedimentation treatment effectively reduces the load on subsequent filter media and avoids the problem of waste directly clogging the surface of filter media in traditional filters. The drain pipe connected to the bottom of the sedimentation chamber can periodically discharge accumulated waste, preventing secondary decomposition and pollution within the system. After preliminary sedimentation, the upper layer of clear water overflows naturally into the filter chamber through the overflow port at the top of the baffle plate. This overflow design ensures that only relatively clean upper layer water enters the next stage of filtration, further improving filtration efficiency. Inside the filter chamber, multiple filter plate units carry filter cotton to perform fine filtration of the water flow. The detachable design of the filter plate units makes it simple and convenient to replace and clean the filter cotton without stopping the entire filtration system. The filtered clean water returns to the aquarium through the deluge pipe, increasing the dissolved oxygen content in the water and improving water quality. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention when used with a fish tank;

[0020] Figure 2 This is a three-dimensional structural diagram of the present invention;

[0021] Figure 3 This is a cross-sectional view of the present invention;

[0022] Figure 4 This is a schematic diagram of the internal structure of the filter chamber in this utility model;

[0023] Figure 5 This is a three-dimensional structural diagram of the filter plate unit in this utility model;

[0024] Figure 6 This is a three-dimensional structural diagram of the rain shower component and the water outlet pipe in this utility model.

[0025] In the diagram, 1. Filter box; 2. Connecting mechanism; 3. Fish tank; 4. Water inlet; 5. Sedimentation chamber; 6. Filter chamber; 7. Water pump; 8. Baffle; 9. Overflow outlet; 10. Drain pipe; 11. Filter plate unit; 12. Filter cotton; 13. Deluge pipe; 14. Bracket; 15. Water permeable window; 16. Water barrier; 17. Water permeable hole; 18. Handle; 19. Guide ridge; 20. Guide groove; 21. Claw; 22. Snap-fit ​​protrusion; 23. Addition... 24. Long splicing box; 25. Snap-fit ​​flange; 26. Slot; 27. Water inlet; 28. Water inlet chamber; 29. ​​Water outlet chamber; 30. Deluge hole; 31. Pipe body; 32. Connecting joint; 33. Connecting cap; 34. Clip; 35. Hanging plate; 36. Guide space; 37. Sloping bottom plate; 38. Water outlet pipe; 39. Deluge component; 40. Dispersion hole; 41. Hook bracket; 42. Mounting plate; 43. Hook part; 44. Top cover; 45. Waterproof plate. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0027] Example 1: As Figures 1-6 As shown, a top-mounted filter device for a fish tank includes a filter box 1, which is connected to a fish tank 3 via a connecting mechanism 2. Inside the filter box 1, along the water flow direction, there are an inlet chamber 4, a sedimentation chamber 5, and a filter chamber 6 arranged sequentially. A water pump 7 is installed in the inlet chamber 4. A water baffle 44 is installed between the sedimentation chamber 5 and the filter chamber 6. An overflow port 9 is formed on the water baffle 44 so that the sedimentation chamber 5 is connected to the filter chamber 6 through the overflow from the top. The sedimentation chamber 5 is also connected to a drain pipe 10. The filter chamber 6 is provided with multiple filter plate units 11 for carrying filter cotton 12. A rain pipe 13 is also provided on the filter box 1 and is connected to the filter chamber 6.

[0028] Example 2: Figures 1-6 As shown, unlike Embodiment 1, the filter plate unit 11 includes a bracket 14 and a partition 8. The bracket 14 and the partition 8 are detachably connected, and an installation space for accommodating the filter cotton 12 is formed between the bracket 14 and the partition 8. A water-permeable window 15 is provided on the upper part of one side of the bracket 14, and a closed water-blocking part 16 is provided on the lower part. A plurality of water-permeable holes 17 are evenly distributed on the partition 8.

[0029] The aquarium top-mounted filter device of this utility model achieves efficient staged filtration through a three-chamber separation design. During operation, the water pump 7 draws raw water containing fish feces, uneaten food, and other waste from the bottom of the aquarium 3 into the inlet chamber 4, and then transports it to the sedimentation chamber 5. In the sedimentation chamber 5, large particles of waste naturally settle due to gravity, achieving the first line of defense in physical separation. This pre-sedimentation treatment effectively reduces the load on subsequent filter media. After initial sedimentation, the upper layer of clear water overflows naturally into the filter chamber 6 through the overflow port 9 at the top of the partition 8. Inside the filter chamber 6, the water flows through the water permeable holes 17 on the partition 8 into the installation space between the bracket 14 and the partition 8. Because the lower part of the bracket 14 has a closed water-blocking part 16, the water cannot pass through directly horizontally and is forced to change its flow direction and move upward. This forced upward flow path means that the water must pass through a larger area of ​​the filter cotton 12 before it can flow out from the water permeable window 15 at the top of the bracket 14. Compared with the traditional horizontal penetration filtration, this design extends the filtration path of the filter cotton 12 from a single thickness direction to the height direction, making full use of the three-dimensional space of the filter cotton 12, significantly improving the utilization rate and filtration efficiency of the filter material. At the same time, the detachable connection design of the bracket 14 and the partition 8 makes it extremely convenient to replace the filter cotton 12. Users can easily replace the filter cotton 12 by simply removing the partition 8 without disassembling the entire filtration system.

[0030] In this embodiment, the top of the bracket 14 is provided with a handle 18, the two sides of the partition 8 are provided with guide protrusions 19, and the two inner walls of the filter chamber 6 are provided with guide grooves 20 respectively. The guide protrusions 19 can be slidably inserted into the guide grooves 20.

[0031] In the above structure, the filter plate unit 11 adopts a guide installation structure, which significantly improves ease of use and maintenance efficiency. The handle 18 set on the top of the bracket 14 provides users with a convenient gripping point, making the removal and placement of the filter plate unit 11 easier and less strenuous. Especially after the filter cotton 12 absorbs water and becomes heavy, the design of the handle 18 allows users to smoothly remove the entire filter plate unit 11 from the filter chamber 6 with one hand, avoiding the problems of squeezing and deforming the filter cotton 12 or splashing dirty water that may occur when holding it with both hands from both sides in the traditional design.

[0032] The sliding fit structure formed by the guide protrusions 19 on both sides of the partition 8 and the guide grooves 20 on the inner wall of the filter chamber 6 offers several advantages: First, it ensures accurate installation and positioning of the filter plate unit 11. Users only need to align the guide protrusions 19 with the guide grooves 20 to smoothly slide the filter plate unit 11 into place, avoiding installation misalignment or displacement. Second, the guide structure provides stable lateral support during filter plate unit 11 operation, preventing shaking or displacement caused by water flow impact and ensuring the stability of the filtration effect. Third, the standardized guide groove design allows multiple filter plate units 11 to be neatly arranged, maintaining a uniform spacing between adjacent filter plate units 11 to form a regular filtration channel. This modular installation method not only simplifies daily maintenance operations, allowing users to remove any filter plate unit 11 for cleaning or replacement of the filter cotton 12 without affecting other units, but also improves the reliability and service life of the entire filtration system.

[0033] In this embodiment, the edge of the partition 8 is provided with a claw 21, and the corresponding position of the bracket 14 is provided with a snap-fit ​​protrusion 22. The claw 21 and the snap-fit ​​protrusion 22 cooperate to realize the detachable connection between the partition 8 and the bracket 14.

[0034] The filter plate unit 11 of this utility model adopts a reliable snap-fit ​​connection structure, effectively solving the technical problem of difficult filter media replacement in traditional filters. The claws 21 on the edge of the partition 8 engage with the corresponding snap-fit ​​protrusions 22 on the bracket 14. This snap-fit ​​structure has significant technical advantages: First, the snap-fit ​​connection method achieves tool-free assembly and disassembly. Users can connect or separate the partition 8 and the bracket 14 simply by pressing or inserting, greatly simplifying the operation process and improving maintenance efficiency compared to traditional methods such as threaded connections or adhesive fixation. Second, the snap-fit ​​structure provides stable and reliable connection strength. The interference fit between the claws 21 and the snap-fit ​​protrusions 22 ensures that a stable connection is formed after the two are connected. The sealed space for the filter cotton 12 prevents it from shifting or falling off under the impact of water flow, and also avoids water from short-circuiting through the connection gaps, thus reducing the filtration effect. Furthermore, this detachable design makes the replacement of the filter cotton 12 extremely convenient. Users only need to remove the partition 8 from the bracket 14 to directly remove or insert the filter cotton 12. The entire replacement process can be completed in a few seconds without moving the entire filter plate unit 11 or stopping the filtration system. The above design not only reduces the user's maintenance costs, but also extends the service life of the entire filtration device.

[0035] In this embodiment, the bottom of the water inlet chamber 4 is detachably connected to an extended splicing box 23. The upper two side walls of the extended splicing box 23 are provided with outwardly extending snap-fit ​​flanges 24, and the side walls of the water inlet chamber 4 are provided with corresponding slots 25. The snap-fit ​​flanges 24 and the slots 25 are detachably connected by snap-fit. The bottom of the extended splicing box 23 is also provided with a water inlet 26.

[0036] The bottom of the water inlet chamber 4 of this utility model adopts a detachable extended splicing box 23 design, which solves the problem of the adaptability of the filter device to fish tanks 3 of different depths. The outwardly extending snap-fit ​​flanges 24 on the upper two side walls of the extended splicing box 23 form a reliable snap-fit ​​engagement with the snap-fit ​​grooves 25 on the side wall of the water inlet chamber 4. By adding or removing the extended splicing box 23, the height of the water inlet 26 from the bottom of the fish tank 3 can be flexibly adjusted, so that the same filter device can be used for fish tanks 3 of various sizes with different depths, which greatly improves the versatility and market adaptability of the product. Users do not need to buy a new filter when changing fish tanks 3 of different depths.

[0037] The detachable snap-fit ​​structure makes length adjustment simple and quick. Users simply align the snap-fit ​​flange 24 with the slot 25 and push it in to complete the installation. The entire process requires no tools, and even first-time users can easily complete it in seconds. The position of the water inlet 26 at the bottom of the extended splicing box 23 can be adjusted according to the actual depth of the aquarium 3. This avoids the water inlet 26 being too low and sucking in substrate, causing blockage, while also preventing the water inlet 26 from being too high and affecting the absorption of bottom debris, ensuring optimal water intake performance. This modular design also brings convenience to maintenance. When the water inlet pipe needs cleaning, users can easily remove the extended splicing box 23 for separate cleaning, completely solving the problem of difficult cleaning of the inner wall of the pipes in traditional integrated designs, effectively extending the service life of the equipment.

[0038] In this embodiment, the rain pipe 13 has a flat box structure, including an inlet chamber 27 and an outlet chamber 28 that are connected to each other. The rain pipe 13 is horizontally fixed on the side wall of the filter box 1 and extends to the top of the filter chamber 6. The inlet chamber 27 is connected to the filter chamber 6. The bottom surface of the outlet chamber 28 is provided with a plurality of rain holes 29, which are distributed in an array.

[0039] The deluge pipe 13 of this invention adopts a flat box-shaped structure design, internally divided into two interconnected functional areas: an inlet chamber 27 and an outlet chamber 28. This structural design excels in improving the uniformity of water flow distribution. Compared with the traditional round tube deluge pipe 13, the flat box-shaped structure has a larger cross-sectional area, providing ample buffer space before the water flows into the outlet chamber 28, effectively reducing water flow velocity and pressure, and avoiding water splashing caused by direct impact from high-speed water flow.

[0040] The arrangement of the rain pipe 13, which is horizontally fixed to the side wall of the filter box 1 and extends to the top of the filter chamber 6, makes full use of the upper space of the filter device without occupying additional installation space, while ensuring that the rainwater flow can evenly cover the entire water surface area. The direct connection between the water inlet chamber 27 and the filter chamber 6 simplifies the water circuit structure, reduces water flow resistance and energy loss, and improves the working efficiency of the water pump 7.

[0041] The multiple deluge holes 29 on the bottom surface of the water outlet chamber 28 are arranged in a circular array. This regular arrangement ensures that the water output of each deluge hole 29 is basically consistent, and the water flows evenly like a fine rain. This increases the contact area between the water and the air, improves the dissolved oxygen content, and avoids the stress response to fish caused by concentrated water flow. The circular hole design also facilitates manufacturing and is not easily clogged. Even if a small amount of impurities adhere after long-term use, it can be restored to normal use by simple rinsing or clearing with a fine needle, greatly reducing the difficulty of maintenance.

[0042] Example 3: Figures 1-6 As shown, unlike Embodiment 2, the sewage pipe 10 includes a pipe body 30 and a connecting joint 31. The connecting joint 31 is fixedly installed on the bottom wall of the sedimentation tank 5. One end of the pipe body 30 is connected to the connecting joint 31, and the other end of the pipe body 30 is provided with a connecting cap 32. A clip 33 is fixed on the connecting cap 32, and a hanging plate 34 for the clip 33 to be engaged is fixed on the side wall of the filter box 1.

[0043] The sewage pipe 10 of this utility model adopts a flexible and convenient suspended structure design. The efficient sewage discharge function is achieved through the cooperation of the pipe body 30 and the connecting joint 31. The design of the connecting joint 31 being fixedly set on the bottom wall of the sedimentation tank 5 ensures the stability and sealing of the sewage outlet position. Setting the sewage outlet at the lowest point of the sedimentation tank 5 can maximize the discharge of sediment.

[0044] One end of the pipe body 30 is connected to the connecting joint 31, forming a complete sewage discharge channel. The connecting cap 32 at the other end of the pipe body 30 not only serves as a seal to prevent odors from escaping or sewage from flowing back when not in use, but also acts as a fixing base for the clip 33. The clip 33 fixed on the connecting cap 32 and the side wall mounting plate 34 of the filter box 1 form a temporary fixing structure. During daily filtration, the sewage discharge pipe 10 is stably suspended on the mounting plate 34 by the clip 33, keeping the pipe body 30 vertical. This saves space and maintains the neat and aesthetically pleasing appearance of the device. When sewage needs to be discharged, the user only needs to remove the clip 33 from the mounting plate 34 to move the sewage discharge pipe 10 to a suitable discharge position for sewage discharge. The entire process requires no disassembly and is extremely simple and quick. After sewage discharge, the clip 33 is simply repositioned onto the mounting plate 34 to restore the original position. The entire process is convenient and greatly improves the user experience.

[0045] In this embodiment, a guiding space 35 is formed between the side wall of the filter chamber 6 and the side wall of the filter box 1. The lower part of the guiding space 35 is connected to the sedimentation chamber 5, and the upper part is connected to the filter chamber 6. The bottom of the sedimentation chamber 5 is provided with a sloping bottom plate 36. The outlet of the water pump 7 is connected to an outlet pipe 37. The outlet pipe 37 extends upward and passes through the sloping bottom plate 36 before entering the guiding space 35. The end of the outlet pipe 37 is located in the guiding space 35 and is fixed with a rain shower component 38. The bottom of the rain shower component 38 is provided with multiple dispersion holes 39.

[0046] This invention features a guiding space 35 between the side wall of the filter chamber 6 and the side wall of the filter box 1. This sandwich structure makes full use of the internal space of the filter device and achieves optimized water flow distribution. The guiding space 35, as a vertical water flow channel, is designed to connect the lower part to the sedimentation chamber 5 and the upper part to the filter chamber 6, forming a water flow distribution system. When the water flow is normal, the water mainly enters the sedimentation chamber 5 through the lower opening for pre-sedimentation treatment. When the water flow is large, the excess water can overflow directly into the filter chamber 6 from the upper opening, effectively avoiding the risk of overflow caused by excessively high water level in the sedimentation chamber 5.

[0047] The sloping bottom plate 36 at the bottom of the sedimentation tank 5 not only facilitates the collection of dirt towards the drain outlet but also provides an ideal installation location for the outlet pipe 37. The arrangement of the outlet pipe 37, connected to the outlet of the water pump 7, extending upwards and passing through the sloping bottom plate 36 into the guide space 35, creates an upward flow path for the water. This upward flow helps buffer and disperse the kinetic energy of the water. The deluge element 38 fixed at the end of the outlet pipe 37 is the core component of the entire water distribution system. Multiple dispersion holes 39 at the bottom of the deluge element 38 transform the concentrated water flow into multiple fine streams, greatly reducing the impact force of the water flow and preventing strong water flow from disturbing the dirt already deposited at the bottom of the sedimentation tank 5, thus ensuring the sedimentation effect. The placement of the deluge element 38 within the guide space 35 also allows for sufficient buffering and pre-dispersion of the water flow before it enters the sedimentation tank 5, creating a relatively gentle inlet state. This gentle inlet method not only improves sedimentation efficiency but also reduces water flow noise, enhancing the overall quietness of the filtration device.

[0048] In this embodiment, the connecting mechanism 2 includes a hook bracket 40, which is disposed on the upper part of the back side of the filter box 1. The hook bracket 40 includes a mounting plate 41 fixedly connected to the back wall of the filter box 1 and a hook portion 42 formed by extending outward from the mounting plate 41 and bending downward. The hook portion 42 is used to hang on the upper edge of the wall of the fish tank 3.

[0049] In the above structure, the fixed connection between the mounting plate 41 and the back wall of the filter box 1 provides reliable structural strength, capable of withstanding the overall weight after being filled with water and filter media, ensuring safety for long-term use. The hook portion 42, which extends outward from the mounting plate 41 and bends downward, adopts an ergonomic arc design. This inverted L-shaped structure can firmly hook onto the upper edge of the aquarium 3 wall, forming a stable three-point support. The horizontal section of the hook portion 42 bears the vertical load, while the vertical section provides anti-fall protection. The back wall of the filter box 1, against the outer wall of the aquarium 3, provides lateral stability.

[0050] This suspended installation method has significant advantages. Users do not need any tools or drilling; they can simply place the hook 42 on the edge of the aquarium 3 to complete the installation. The entire process takes only a few seconds, greatly simplifying the installation process. The width and depth of the hook 42 are designed according to the common wall thickness of aquarium 3 on the market, which has good versatility and can be adapted to various aquariums 3 with different glass thicknesses. The suspended structure also facilitates the movement and adjustment of the filter device. Users can change the position of the filter on the aquarium 3 at any time as needed, or easily remove it when cleaning the aquarium 3.

[0051] In this embodiment, the top of the filter box 1 is provided with a removable top cover 43.

[0052] When it is necessary to add or replace filter media, clean sedimentation tank 5, or check the working status of water pump 7, simply open the top cover 43 to perform the operation directly without moving or disassembling the entire filter device, which greatly improves the convenience of daily maintenance.

[0053] The above description is merely an embodiment of this application and does not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. An over-the-tank filter device for a fish tank, comprising a filter box body connected to the fish tank by a connecting mechanism, characterized in that: The filter housing contains an inlet chamber, a sedimentation chamber, and a filter chamber arranged sequentially along the water flow direction. A water pump is installed in the inlet chamber. A baffle plate is installed between the sedimentation chamber and the filter chamber. An overflow port is formed on the baffle plate, allowing the sedimentation chamber to connect to the filter chamber via an overflow from the top. The sedimentation chamber is also connected to a drain pipe. The filter chamber contains multiple filter plate units for supporting filter cotton. A deluge pipe is also installed on the filter housing and is connected to the filter chamber.

2. An over-the-tank filter according to claim 1, wherein: The filter plate unit includes a bracket and a partition. The bracket and the partition are detachably connected, and an installation space for accommodating filter cotton is formed between the bracket and the partition. A water-permeable window is provided on the upper part of one side of the bracket, and a closed water-blocking part is provided on the lower part. Multiple water-permeable holes are evenly distributed on the partition.

3. An over-the-tank filter apparatus as claimed in claim 2, wherein: The bracket is provided with a handle at the top, the partition is provided with guide strips on both sides, and the filter chamber is provided with guide grooves on both inner walls. The guide strips can be slidably inserted into the guide grooves.

4. An over-the-tank filter according to claim 2, wherein: The partition is provided with claws on its edge, and the bracket is provided with a snap-fit ​​protrusion at the corresponding position. The claws and the snap-fit ​​protrusion cooperate to realize the detachable connection between the partition and the bracket.

5. An above filter device for an aquarium as defined in claim 1, wherein: The bottom of the water inlet chamber is detachably connected to an extended splicing box. The upper two side walls of the extended splicing box are provided with outwardly extending snap-fit ​​flanges, and the side walls of the water inlet chamber are provided with corresponding snap-fit ​​grooves. The snap-fit ​​flanges and the snap-fit ​​grooves are detachably connected by snap-fit. The bottom of the extended splicing box is also provided with a water inlet.

6. An above filter fish tank as claimed in claim 1, wherein: The rain tube has a flat box structure, including an inlet chamber and an outlet chamber that are connected to each other. The rain tube is horizontally fixed to the side wall of the filter box and extends to the top of the filter chamber. The inlet chamber is connected to the filter chamber. The bottom surface of the outlet chamber has multiple rain holes that are arranged in an array.

7. An above filter device for an aquarium as defined in claim 1, wherein: The sewage pipe includes a pipe body and a connecting joint. The connecting joint is fixedly installed on the bottom wall of the sedimentation tank. One end of the pipe body is connected to the connecting joint, and the other end of the pipe body is provided with a connecting cap. A clip is fixed on the connecting cap, and a hanging plate for the clip to be engaged is fixed on the side wall of the filter box.

8. An above filter fish tank as claimed in claim 1, wherein: A guiding space is formed between the side wall of the filter chamber and the side wall of the filter box. The lower part of the guiding space is connected to the sedimentation chamber, and the upper part is connected to the filter chamber. The bottom of the sedimentation chamber is provided with a sloping bottom plate. The outlet of the water pump is connected to an outlet pipe. The outlet pipe extends upward and passes through the sloping bottom plate before entering the guiding space. The end of the outlet pipe is located in the guiding space and is fixed with a rain shower component. The bottom of the rain shower component has multiple dispersion holes.

9. An above filter fish tank as claimed in claim 1, wherein: The connecting mechanism includes a hook bracket, which is disposed on the upper back of the filter box. The hook bracket includes a mounting plate fixedly connected to the back wall of the filter box and a hook portion extending outward from the mounting plate and bent downward to form a hook portion for hanging on the upper edge of the aquarium wall.

10. An above filter fish tank as claimed in claim 1, wherein: The filter housing has a removable top cover.

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