Filtering structure of closed fish tank
By designing a combination of filter tank and culture box in the aquarium, the problem of unstable water quality in small-volume, high-density aquaculture scenarios is solved, achieving efficient water purification and stability, and improving culture efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGMEN CHANGRUI AQUATIC PROD CO LTD
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-21
AI Technical Summary
Existing aquarium filtration systems are insufficient in small-volume, high-density aquaculture scenarios, leading to instability in water quality and uneven water flow distribution, resulting in low bacterial cultivation efficiency.
Design a closed aquarium filtration structure, including a filter tank and a culture box. Water is introduced into the culture box through the filter holes of the filter tank to come into contact with the culture material, thereby achieving biodegradation and improving water quality.
It achieves stable and efficient water quality purification in small-volume aquariums, ensuring continuous water quality stability through multi-stage filtration and biodegradation.
Smart Images

Figure CN224139922U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to aquarium technology, and more particularly to a filtration structure for a closed aquarium. Background Technology
[0002] In aquarium water treatment systems, a water pump typically draws and circulates the water within the aquarium to maintain circulation. A filtration system is installed inside the aquarium to filter out impurities from the circulating water. To further improve water quality, nitrifying bacteria and other microbial communities are cultivated within the aquarium to biodegrade some of the impurities and purify the water.
[0003] However, existing filtration systems in aquariums have problems such as insufficient surface area for beneficial bacteria to attach and uneven water flow distribution leading to low bacterial cultivation efficiency. Especially in high-density aquarium farming scenarios with small volume, the biodegradation capacity of nitrifying bacteria is difficult to meet the requirements for stable water quality. Utility Model Content
[0004] To overcome the shortcomings of the existing technology, this utility model provides a closed aquarium filtration structure, which uses a filter tank to filter the aquarium water. The filtered water enters the culture box, where it comes into full contact with the culture material and undergoes biodegradation, thereby achieving the filtration and full degradation of circulating water and improving water quality.
[0005] The purpose of this utility model is to provide a filtration structure for a closed aquarium, including,
[0006] Cylinder block;
[0007] A filter assembly includes a filter support and a culture box. The filter support is installed on the tank body. The filter support has a filter groove, and the bottom wall of the filter groove has multiple filter holes. The culture box contains culture material and is located at the bottom of the filter support and below the filter groove. The multiple filter holes are used to guide water flow into the culture box.
[0008] A water pump assembly, comprising a water pump and a guide pipe, wherein the water pump is installed in the cylinder, one end of the guide pipe is connected to the water pump, and the other end of the guide pipe guides water flow to the filter tank.
[0009] In this utility model, as a preferred embodiment, the filter tank is provided with a plurality of filter plates, which are spaced apart in the filter tank to form a filter interval; the filter holes are provided in the filter interval.
[0010] In this utility model, as a preferred embodiment, at least one of the filter intervals is provided with a plurality of water-blocking plates, and the plurality of water-blocking plates are arranged in the filter interval.
[0011] In this utility model, as a preferred embodiment, the water-blocking plate is inclined.
[0012] In this utility model, as a preferred embodiment, the top of the culture box is provided with a conductive opening; a baffle plate is provided inside the culture box, which divides the culture box into a culture chamber section and a water outlet section; the bottom end of the baffle plate is spaced from the bottom wall of the culture box to form a conductive gap, and the bottom ends of the culture chamber section and the water outlet section are connected through the conductive gap; the culture chamber section is provided with the culture material and is correspondingly located below the filter tank; the water outlet section is connected to the cylinder body through the conductive opening.
[0013] In this utility model, as a preferred embodiment, the side wall of the culture box is provided with a first slot, and the side of the baffle plate is engaged with the first slot.
[0014] In this utility model, as a preferred embodiment, the bottom end of the filter bracket is provided with mounting supports on both sides, and the two mounting supports are spaced apart to form an installation interval; the culture box is installed in the installation interval and is detachably connected to the mounting supports.
[0015] In this utility model, as a preferred embodiment, the side of the mounting support is provided with a second slot, and the side of the culture box is provided with a snap-fit piece, which snaps into the second slot.
[0016] In this utility model, as a preferred embodiment, the mounting bracket is detachably connected to the filter bracket by connecting bolts.
[0017] In this utility model, as a preferred embodiment, the filter bracket is fitted around the top perimeter of the fish tank; the bottom of the filter bracket is provided with a light, which is offset from the culture box; and the top of the filter bracket is covered with a cover plate.
[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:
[0019] By installing a water pump in the tank, connecting one end of a guide pipe to the water pump, and guiding the other end of the guide pipe to the filter tank, the water in the tank can enter the filter tank through the water pump and the guide pipe for filtration. Then, by placing the culture box at the bottom of the filter support and below the filter tank, and by having multiple filter holes on the bottom wall of the filter tank, the water entering the filter tank can flow into the culture box through the filter holes and fully contact the culture material in the culture box for biodegradation before flowing back into the tank. This achieves impurity filtration and biodegradation purification of the circulating water in the tank, thereby ensuring the stability of the water quality in the tank. Attached Figure Description
[0020] Figure 1 This is a cross-sectional view of the fish tank according to this utility model;
[0021] Figure 2 This is a cross-sectional view of the fish tank of this utility model from another perspective;
[0022] Figure 3 This is an exploded structural diagram of the filter assembly of this utility model;
[0023] Figure 4 This is a schematic diagram of the structure of the filter support of this utility model;
[0024] Figure 5 This is a schematic diagram of the structure of the culture box of this utility model;
[0025] Figure 6 This is a schematic diagram of the structure of the filter assembly of this utility model;
[0026] Figure 7 This is a schematic diagram of the overall structure of the fish tank according to this utility model.
[0027] In the diagram: 10. Cylinder body; 20. Filter bracket; 21. Filter tank; 22. Filter disc; 23. Filter hole; 24. Water baffle; 30. Culture box; 31. Clip-on piece; 32. Water baffle; 33. Culture chamber section; 34. Water outlet section; 35. Conductive opening; 36. First slot; 40. Mounting support; 41. Second slot; 42. Connecting bolt; 50. Cover plate; 70. Lighting lamp. Detailed Implementation
[0028] The utility model will now be further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments. Unless otherwise specified, the materials and equipment used in this embodiment are all commercially available. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.
[0029] In the description of this application, it should be understood that the terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "a plurality of" means two or more, unless otherwise precisely specified.
[0030] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "connected," "linked," and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a connection through an intermediary, or a connection within two elements or an interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0031] The terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus.
[0032] like Figures 1-7 The diagram shows a closed aquarium filtration structure, including a tank body 10, a filter assembly, and a water pump assembly. Specifically, the filter assembly includes a filter support 20 and a culture box 30. The filter support 20 can be installed on the tank body 10, and the filter support 20 has a filter groove 21 with multiple filter holes 23 on the bottom wall of the filter groove 21. The culture box 30 contains culture material and can be placed at the bottom of the filter support 20 and below the filter groove 21. The multiple filter holes 23 are used to guide water flow into the culture box 30. The water pump assembly includes a water pump and a connecting pipe. The water pump can be installed on the tank body 10, and one end of the connecting pipe is connected to the water pump, while the other end of the connecting pipe guides water flow to the filter groove 21.
[0033] Based on the above structure, when using the closed aquarium filtration structure of this utility model, a water pump can be installed on the tank body 10, and one end of the water pump can be electrically connected to an external power source. Then, one end of the connecting pipe is connected to the water pump, and the other end of the connecting pipe is used to guide water flow to the filter tank 21. This allows the water in the tank body 10 to enter the filter tank 21 through the connecting pipe via the water pump for filtration, thereby filtering impurities in the water in the tank body 10. Then, the culture box 30 can be placed at the bottom of the filter support 20 and located in the filter tank 21. Below, multiple filter holes 23 are provided on the bottom wall of the filter tank 21, so that water entering the filter tank 21 can flow into the culture box 30 through the filter holes 23. Culture materials can be placed in the culture box 30, so that the water entering the culture box 30 can fully contact the culture materials and undergo biodegradation. Then, the water is guided back to the tank body 10 through the water outlet of the culture box 30. This can achieve impurity filtration and biodegradation purification of the circulating water in the tank body 10, thereby maintaining the continuous stability of the water quality in the tank body 10.
[0034] It should be noted that the culture material can be any existing bacterial culture material used for water purification, such as nitrifying bacteria, photosynthetic bacteria, Bacillus, yeast, etc. The appropriate culture material can be selected according to different usage scenarios to meet the needs of water purification. For example, nitrifying bacteria culture material can be used to purify the water in aquariums.
[0035] In this utility model, as a preferred embodiment, multiple filter plates 22 can be provided in the filter tank 21. The multiple filter plates 22 can be arranged at intervals in the filter tank 21 to form a filter interval, and then filter holes 23 are provided in the filter interval. The filter plates 22 can filter impurities in the water entering the filter tank 21. The multiple filter plates 22 improve the overall filtration efficiency of the water entering the filter tank 21 and avoid the blockage caused by a single filter plate 22 due to excessive interception of impurities, which would affect the filtration effect. The water filtered by the filter plates 22 can be guided into the culture box 30 through the filter holes 23 provided in the filter interval.
[0036] In this utility model, as a preferred embodiment, multiple water-blocking plates 24 can be provided in at least one filter interval, and multiple water-blocking plates 24 can be arranged in the filter interval. The water-blocking plates 24 can make the water flow form a tortuous flow path in the filter tank 21, increasing the residence time of the water in the filter tank 21. This allows the water to fully contact the filter plates 22, thereby improving the filtration effect. Multiple water-blocking plates 24 can distribute the incoming water more evenly on the cross-section of the filter tank 21, ensuring sufficient filtration of the water flow and avoiding the existence of filtration blind spots due to excessive water flow, thereby improving filtration efficiency.
[0037] In this utility model, as a preferred embodiment, the baffle plate 24 can be set at an angle, which allows the water to flow along the inclined direction, guiding the water flow to be more evenly distributed in the filter tank 21, avoiding short-circuiting or deflection of the water flow, optimizing the water flow guidance, and the inclined baffle plate 24 can cause local changes in the water flow velocity, which is conducive to the suspended particles in the water settling along the inclined surface of the baffle plate 24 to the bottom of the filter tank 21 under the action of gravity, improving the settling efficiency and reducing the impurity content in the water.
[0038] In this invention, as a preferred embodiment, a conductive opening 35 is provided at the top of the culture box 30, and a baffle plate 32 is provided inside the culture box 30. The baffle plate 32 divides the culture box 30 into a culture chamber section 33 and a water outlet section 34. Specifically, the bottom end of the baffle plate 32 forms a conductive gap with the bottom wall of the culture box 30, and the bottom ends of the culture chamber section 33 and the water outlet section 34 are connected through the conductive gap. The culture chamber section 33 is correspondingly located below the filter tank 21, so that water entering the filter tank 21 flows into the culture chamber of the culture box 30 through the filter hole 23. Section 33 is equipped with a culture material, which allows the water entering the culture chamber to fully contact the culture material and undergo degradation to purify the water. The water then enters the outlet chamber 34 through the bottom guide gap, where it fully contacts the culture material from top to bottom. The water then flows from bottom to top into the outlet chamber 34. The outlet chamber 34 is connected to the tank body through the guide opening 35, allowing the purified water to flow back into the tank body. This achieves impurity filtration and biodegradation purification of the circulating water in the tank body 10, thereby ensuring the stability of the water quality in the tank body 10.
[0039] It should be noted that the through-hole can extend through the top of the culture chamber. During assembly, the portion of the through-hole corresponding to the culture chamber section is positioned below the filter tank, while the portion corresponding to the water outlet section protrudes outwards, connecting with the filter support and the tank body. This allows for communication between the filter tank and the culture chamber section, as well as between the through-hole and the tank body, simplifying manufacturing. Alternatively, the through-hole can be positioned only at the top of the water outlet section, while multiple water passages at the top of the culture chamber section can correspond to the filter holes in the filter tank, thus achieving communication between the culture chamber section and the filter tank.
[0040] In this utility model, as a preferred embodiment, a first slot can be provided on the side wall of the culture box 30, and the side of the baffle plate 32 can be snapped into the first slot 36. This also allows the baffle plate 32 to be snapped into the side wall of the culture box 30 through the first slot 36, which facilitates the later disassembly and maintenance of the baffle plate 32.
[0041] In this utility model, as a preferred embodiment, mounting supports 40 are provided on both sides of the bottom end of the filter bracket 20, with a mounting gap formed between the two mounting supports 40. The culture box 30 can then be installed in the mounting gap and detachably connected to the mounting supports 40. For example, the side of the mounting support 40 is provided with a second slot 41, and the side of the culture box 30 is provided with a snap-fit piece 31. The culture box 30 can be detachably installed on the mounting support 40 by snapping the snap-fit piece 31 into the second slot 41. Alternatively, a connection port can be provided on the mounting support 40, and a connection through hole can be opened on the culture box 30. This allows for a detachable connection between the culture box 30 and the mounting support 40 by using a screw structure that passes through the connection through hole and screws into the connection port, facilitating the disassembly and replacement of the culture box 30 according to different usage scenarios.
[0042] In this utility model, as a preferred embodiment, the mounting bracket 40 can be detachably connected to the filter bracket 20 by connecting bolts 42. This allows the mounting bracket 40 to be stably installed on the filter bracket 20, improving the overall stability of the mounting bracket 40 and facilitating the disassembly and maintenance of the mounting bracket 40.
[0043] In this invention, as a preferred embodiment, the filter support 20 can be fitted around the top edge of the fish tank, and a light 70 is provided at the bottom of the filter support 20 for illumination. The light 70 is offset from the culture box 30, and the top of the filter support 20 is covered with a cover plate 50.
[0044] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.
Claims
1. A filter structure for a closed fish tank, characterized by include, Cylinder block; A filter assembly includes a filter support and a culture box. The filter support is installed on the tank body. The filter support has a filter groove, and the bottom wall of the filter groove has multiple filter holes. The culture box contains culture material and is located at the bottom of the filter support and below the filter groove. The multiple filter holes are used to guide water flow into the culture box. A water pump assembly, comprising a water pump and a guide pipe, wherein the water pump is installed in the cylinder, one end of the guide pipe is connected to the water pump, and the other end of the guide pipe guides water flow to the filter tank.
2. The filter structure of a closed fish tank according to claim 1, wherein, The filter tank is provided with a plurality of filter plates, which are arranged at intervals in the filter tank to form filter intervals; the filter holes are provided in the filter intervals.
3. The filter structure of a closed fish tank according to claim 2, wherein, At least one of the filter intervals is provided with a plurality of water-blocking plates, and the plurality of water-blocking plates are arranged in the filter interval.
4. The filtration structure of the closed aquarium according to claim 3, characterized in that, The water-blocking plate is set at an angle.
5. A filter construction for a closed fish tank according to any one of claims 1-4, characterized in that The top of the culture box is provided with a conductive opening; a baffle plate is provided inside the culture box, which divides the culture box into a culture chamber section and a water outlet section; the bottom end of the baffle plate is spaced from the bottom wall of the culture box to form a conductive gap, and the bottom ends of the culture chamber section and the water outlet section are connected through the conductive gap; the culture chamber section is provided with the culture material and is correspondingly located below the filter tank; the water outlet section is connected to the cylinder body through the conductive opening.
6. The filter structure of a closed fish tank according to claim 5, wherein, The side wall of the culture box is provided with a first slot, and the side of the baffle plate is engaged with the first slot.
7. A filter construction for a closed fish tank according to any one of claims 1-4, characterized in that The filter support is provided with mounting brackets on both sides of its bottom end, and the two mounting brackets are spaced apart to form an installation interval; the culture box is installed in the installation interval and is detachably connected to the mounting brackets.
8. The filter structure of a closed fish tank according to claim 7, wherein, The mounting bracket has a second slot on its side, and the culture box has a snap-fit piece protruding from its side, which snaps into the second slot.
9. The filter structure of a closed fish tank according to claim 8, wherein, The mounting bracket is detachably connected to the filter bracket via connecting bolts.
10. The filter structure of the closed aquarium according to any one of claims 1-4, characterized in that, The filter support is fitted around the top edge of the fish tank; a light is provided at the bottom of the filter support, and the light is offset from the culture box; a cover is provided at the top of the filter support.