A fish tank top filter structure

By designing a top filter structure for aquariums and adopting a multi-stage filtration system and forced circulation, the problem of insufficient biological filtration capacity of traditional aquarium filtration devices has been solved, achieving efficient water purification and simplified maintenance.

CN224440118UActive Publication Date: 2026-07-03SUQIAN STAR AQUARIUM TECHNOLOGY CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
SUQIAN STAR AQUARIUM TECHNOLOGY CO LTD
Filing Date
2025-09-30
Publication Date
2026-07-03

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  • Figure CN224440118U_ABST
    Figure CN224440118U_ABST
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Abstract

This utility model discloses a fish tank top filter structure, including a water tank, filter devices arranged on both sides of the water tank, and a cover covering the filter devices. A water outlet is provided on one side of the bottom of the water tank. An air pump is installed inside the water tank, and filter media is provided at the bottom of the water tank. The filter devices include a box body with a first water inlet. A support boss is provided inside the box body, and a first filter box filled with activated carbon is placed on the upper part of the support boss. A second filter box filled with filter cotton is placed on the lower part of the support boss. Both the first and second filter boxes have perforations. Product advantages: This structure provides a complete physical, chemical, and biological three-in-one filtration system. Physical filtration is achieved by filter cotton, chemical filtration by activated carbon, and the filter media at the bottom of the water tank are mainly used for biological filtration. This multi-stage filtration can effectively remove impurities, odors, and harmful substances from the water, keeping the water quality clear and healthy.
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Description

Technical Field

[0001] This utility model relates to the field of aquarium technology, and in particular to an aquarium top filter structure. Background Technology

[0002] In the field of aquarium keeping, maintaining clean and stable water quality is of paramount importance. The filtration system is the core component of the aquarium, and its performance directly affects the health of aquatic organisms. Filtration systems typically need to have three functions: physical filtration, chemical filtration, and biological filtration. Physical filtration is used to trap solid impurities such as feces and food residues; chemical filtration mainly uses activated carbon and other materials to adsorb pigments, odors, and drug residues in the water; and biological filtration relies on microbial communities such as nitrifying bacteria attached to the filter media to decompose substances such as ammonia and nitrite that are toxic to fish. Utility Model Content

[0003] The purpose of this invention is to solve the problem that traditional filtration devices mainly perform physical filtration, have weak biological filtration capabilities, resulting in unstable water quality, the need for frequent cleaning and replacement of filter media, or the need for frequent and regular water changes in the aquarium, which is too troublesome to operate and cannot reduce the cleaning cycle of the aquarium.

[0004] This utility model achieves the above objectives through the following technical solutions:

[0005] A fish tank top filter structure includes a water tank, filter devices disposed on both sides of the water tank, and a cover covering the filter devices. The water tank has an outlet on one side of its bottom, an air pump inside the water tank, and filter media at the bottom of the water tank. Each filter device includes a housing with a first inlet. A support boss is located inside the housing, and a first filter box filled with activated carbon is placed on the upper part of the support boss. A second filter box filled with filter cotton is placed on the lower part of the support boss. Both the first and second filter boxes have perforations, providing at least two stages of filtration. The filtration system combines chemical filtration with activated carbon and physical filtration with filter cotton, along with auxiliary filter media (commonly used for biological filtration) at the bottom of the tank, forming a complete physical, chemical, and biological three-in-one filtration system. This effectively removes impurities, odors, and harmful substances from the water, resulting in clearer and healthier water. The first and second filter boxes within the filtration device feature a repositionable design, allowing users to easily replace activated carbon and filter cotton as needed, simplifying daily maintenance and cleaning. The filtration system is located on both sides of the tank, making it a top filter type with a compact structure that effectively utilizes the upper space of the aquarium, reducing the space occupied inside or outside the aquarium.

[0006] Furthermore, the cover includes a T-shaped cover body, the T-shaped cover body is provided with a vent hole, the front end of the T-shaped cover body is provided with an observation cover, the lower end of the T-shaped cover body is provided with a lighting lamp, and the T-shaped cover body is also provided with a second water inlet.

[0007] Furthermore, the filter device is fixedly connected to the bottom of the cover via a plug-in slot. This plug-in slot fixing method makes the connection and separation between the filter device and the cover quick and easy. While providing convenience, the plug-in slot connection method also ensures that the fixed connection between the filter device and the cover is stable and reliable, preventing accidental detachment during use.

[0008] Furthermore, the outlet is connected to a hose and a pumping device to draw polluted water into the second inlet for filtration. Through the external hose and pumping device, polluted water from the bottom of the tank is actively drawn and sent to the second inlet on the cover for filtration, forming a forced circulation. This ensures that all water in the aquarium is effectively filtered, significantly improving filtration efficiency and water quality maintenance capabilities.

[0009] Furthermore, the observation cover is hinged to the T-shaped cover body, and the observation cover is made of transparent material.

[0010] Furthermore, the second water inlet on the cover is connected to the first water inlet on the filter device.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This structure provides a complete three-in-one filtration system integrating physical, chemical, and biological filtration. Physical filtration is achieved through filter cotton, chemical filtration through activated carbon, and the filter media at the bottom of the tank primarily for biological filtration. This multi-stage filtration effectively removes impurities, odors, and harmful substances from the water, keeping it clear and healthy. A connected hose and pump forcefully draws polluted water from the bottom of the tank into the second inlet on the lid for filtration, creating an active and efficient circulation system. This ensures that all water in the aquarium is thoroughly purified, significantly improving filtration efficiency and water quality maintenance. The air pump inside the tank further ensures sufficient oxygen levels in the water, which is beneficial for the healthy growth of the fish.

[0013] 2. This top filter structure has been optimized in terms of user experience and maintenance. The first and second filter boxes inside the filter device adopt a repositionable box design, allowing users to easily replace filter media such as activated carbon and filter cotton as needed, greatly simplifying daily maintenance and cleaning operations. The filter device is fixedly connected to the bottom of the cover through a plug-in slot, realizing quick and easy installation and disassembly, while ensuring a stable and reliable connection. In addition, the transparent hinged observation cover on the T-shaped cover allows users to easily observe the internal conditions of the aquarium and the status of the fish at any time, while the lighting provides necessary illumination and enhances the viewing experience.

[0014] 3. This top-filter structure integrates multiple functions such as filtration, oxygenation, lighting, and observation into the upper part of the aquarium. The filter devices are located on both sides of the tank and covered by a lid, effectively utilizing the space at the top of the aquarium and avoiding occupying valuable space inside the aquarium or additional space outside the aquarium. This makes the overall structure more compact and aesthetically pleasing. This integrated design reduces the number of external devices and wiring, making the aquarium environment cleaner. At the same time, the vents on the T-shaped lid help maintain air circulation inside the aquarium and ensure the ecological balance of the aquarium. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the filtration device of this utility model;

[0017] Figure 3 This is a schematic diagram of the lid of this utility model;

[0018] In the diagram, 1-water tank, 2-filtration device, 3-cover, 4-outlet, 5-oxygenation pump, 6-filter auxiliary material, 21-box body, 22-first inlet, 23-supporting boss, 24-leakage hole, 25-first filter box, 26-activated carbon, 27-second filter box, 28-filter cotton, 31-T-shaped cover, 32-vent hole, 33-observation cover, 34-lighting lamp, 35-second inlet. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Combination Figure 1-3As shown, a fish tank top filter structure includes a water tank 1, filter devices 2 disposed on both sides of the water tank 1, and a cover 3 covering the filter devices 2. A water outlet 4 is provided on one side of the bottom of the water tank 1. An air pump 5 is installed inside the water tank 1. Filter media 6 is provided at the bottom of the water tank 1. The filter device 2 includes a box body 21 with a first water inlet 22. A support boss 23 is provided inside the box body 21. A first filter box 25 is placed on the upper end of the support boss 23 and filled with activated carbon 26. A second filter box 27 is placed at the lower end of the support boss 23 and filled with filter cotton 28. Both the first filter box 25 and the second filter box 27 have a leak-proof design. The 24-hole filter provides at least two stages of filtration: chemical filtration with activated carbon and physical filtration with filter cotton. Combined with the filter media at the bottom of the tank (commonly used for biological filtration), it forms a complete physical, chemical, and biological three-in-one filtration system. It can effectively remove impurities, odors, and harmful substances from the water, making the water clearer and healthier. The first and second filter boxes inside the filter device adopt a repositionable box design, which makes it convenient for users to replace filter media such as activated carbon and filter cotton as needed, simplifying daily maintenance and cleaning operations. The filter device is set on both sides of the tank, which is a top filter type. The structure is compact and effectively utilizes the space above the aquarium, reducing the space occupied inside or outside the aquarium.

[0021] The cover 3 includes a T-shaped cover 31 with a vent 32, an observation cover 33 on the front end of the T-shaped cover 31, a light 34 at the bottom of the T-shaped cover 31, and a second water inlet 35. The filter device 2 is fixedly connected to the bottom of the cover 3 via a plug-in slot. This plug-in slot method makes the connection and separation between the filter device and the cover quick and easy. While providing convenience, the plug-in slot connection also ensures a stable and reliable connection between the filter device and the cover, preventing accidental detachment during use. The outlet 4 is connected to a hose and a pumping device to draw polluted water into the second water inlet 35 for filtration. Through the hose and pumping device, polluted water from the bottom of the tank is actively drawn and fed into the second water inlet on the cover for filtration, forming a forced circulation. This ensures that all water in the aquarium is effectively filtered, significantly improving filtration efficiency and water quality maintenance. The observation cover 33 and the T-shaped cover 31 are connected to the T-shaped cover 31. The cover 31 is hinged, and the observation cover 33 is made of transparent material; the second water inlet 35 on the cover 3 is connected to the first water inlet 22 on the filter device 2.

[0022] Working principle: Polluted water from the bottom of the aquarium is actively extracted through a hose and pump connected to the outside via the outlet 4. This forced pumping circulation ensures that all water in the aquarium is sent to the filtration system for treatment, rather than relying solely on gravity or natural convection. The extracted polluted water is first transported to the second inlet 35 on the cover 3. Since the second inlet 35 is connected to the first inlet 22 on the filter device 2, the water flows from the cover 3 into the housing 21 of the filter device 2, which is located on both sides of the water tank 1. Guided by the support protrusion 23, the water flowing into the filter device 2 first flows through the first filter box 25 placed at the top. The first filter box 25 is filled with activated carbon 26, which performs chemical filtration through adsorption. The system effectively removes odors, pigments, residual chlorine, and harmful organic and inorganic compounds such as ammonia and nitrite from the water, thereby purifying the water quality. The perforations 24 on the first filter box 25 ensure smooth water flow. After being treated by activated carbon, the water continues to flow downwards to the second filter box 27 placed at the lower end of the support protrusion 23. The second filter box 27 is equipped with filter cotton 28, which provides physical filtration. The filter cotton 28 can effectively intercept large particulate impurities, fish excrement, residual feed, and suspended solids in the water, making the water clear. The perforations 24 on the second filter box 27 also ensure the smooth flow of water. The clean water, after being filtered by both physical and chemical methods, flows out from the bottom of the filter device 2 and returns to the water tank 1, completing the water purification cycle.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0024] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A fish tank top filter structure, comprising a water tank (1), filter devices (2) arranged on both sides of the water tank (1), and a cover (3) covering the filter devices (2), characterized in that: The water tank (1) has an outlet (4) on one side of its bottom. The water tank (1) is equipped with an oxygenation pump (5). The bottom of the water tank (1) is equipped with filter material (6). The filter device (2) includes a box body (21). The box body (21) is equipped with a first inlet (22). The box body (21) is equipped with a support boss (23). The support boss (23) is equipped with a first filter box (25) at its upper end. The first filter box (25) is filled with activated carbon (26). The support boss (23) is equipped with a second filter box (27) at its lower end. The second filter box (27) is equipped with filter cotton (28). Both the first filter box (25) and the second filter box (27) are equipped with leakage holes (24).

2. A fish tank upflow filter according to claim 1 wherein: The cover (3) includes a T-shaped cover (31), a vent hole (32) is provided on the T-shaped cover (31), an observation cover (33) is provided on the front end of the T-shaped cover (31), a lighting lamp (34) is provided at the lower end of the T-shaped cover (31), and a second water inlet (35) is also provided on the T-shaped cover (31).

3. A fish tank upflow filter according to claim 2 wherein: The filter device (2) is fixedly connected to the bottom of the cover (3) by means of a plug-in slot.

4. A fish tank upflow filter according to claim 3 wherein: The outlet (4) is connected to a hose and a pumping device to draw polluted water into the second inlet (35) for filtration.

5. A fish tank upflow filter according to claim 4 wherein: The observation cover (33) is hinged to the T-shaped cover (31), and the observation cover (33) is made of transparent material.

6. A fish tank upflow filter according to claim 5 wherein: The second water inlet (35) on the cover (3) is connected to the first water inlet (22) on the filter device (2).