Drawer type filtering system and fish tank

Abstract

The utility model discloses a drawer type filter system and fish tank, wherein the drawer type filter system comprises a box body and a water feeding mechanism, a filter bin is arranged in the box body, a water outlet is arranged on the side wall of the box body, the water feeding mechanism is used for pumping water in the fish tank into the filter bin, and the drawer type filter system also comprises a biochemical filter box arranged in the filter bin; the drawer type filter box is mounted in the filter bin in a drawer type insertion manner and is positioned above the biochemical filter box; the limiting mechanism is arranged between the drawer type filter box and the box body and is used for limiting the movement of the drawer type filter box; wherein the limiting mechanism enables the drawer type filter box to be limited to move in the horizontal direction, and the drawer type filter box can be drawn out in the horizontal direction only when the drawer type filter box firstly moves by a preset distance in the vertical direction; the filter has the advantages of convenience in filter material replacement, sanitation and safety.

Description

Technical Field

[0001] The utility model relates to the technical field of fish tanks, and particularly relates to a drawer-type filtration system and a fish tank. Background Art

[0002] With the improvement of people's living standards, fishkeeping, as a leisure and entertainment activity, is increasingly favored by people. A fish tank is not only a place for fish to live but also a part of home decoration. However, to keep the water quality in the fish tank clean and provide a healthy living environment for fish, an effective water circulation and filtration system is required. Most of the common filtration systems on the market currently use built-in or hanging filters. Although these designs meet the daily filtration requirements to a certain extent, there are still some obvious defects in actual use.

[0003] The maintenance of traditional filtration systems usually involves manually disassembling the filtration unit and directly contacting the filter material. This method not only has many inconveniences in operation but also has potential health hazards. After the filter material has been used for a long time, a large amount of waste and microorganisms will accumulate. Directly contacting these substances by hand is not only unhygienic but also may cause irritation or infection to the skin of the hands. Especially for people with allergic constitutions, this direct contact method may cause discomfort. In addition, frequent manual disassembly also increases the risk of damage to other components inside the filter, reducing the reliability and lifespan of the overall system.

[0004] There are also integrated filtration devices on the market, that is, the filter material (such as filter cotton) is directly installed inside the filter. After using this design for a period of time, when the filter material needs to be cleaned or replaced, the operation is extremely inconvenient. Users usually need to disassemble the entire filter to perform maintenance. This process is both time-consuming and laborious. Frequent disassembly and assembly not only increase the workload of maintenance but also may cause damage to the seals of the filter, thereby affecting its normal operation.

[0005] Therefore, it is particularly necessary to develop a filtration system and a fish tank that are easy to maintain, hygienic, safe, and have a simple structure. Summary of the Invention

[0006] One of the purposes of the utility model is to provide a drawer-type filtration system, which is convenient for replacing filter material and is hygienic and safe.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A drawer-type filtration system includes a box body and a water inlet mechanism. The box body has a filter chamber inside, and a water outlet is provided on the side wall of the box body. The water inlet mechanism is used to pump the water in the fish tank into the filter chamber. It further includes,

[0008] A biochemical filtration box, which is arranged in the filter chamber;

[0009] A drawer - type filter cartridge is installed in the filter chamber in a drawer - type insertion manner and is located above the biochemical filter cartridge.

[0010] A limiting mechanism is arranged between the drawer - type filter cartridge and the box body and is used to limit the movement of the drawer - type filter cartridge.

[0011] Wherein, the limiting mechanism restricts the movement of the drawer - type filter cartridge in the horizontal direction, and the drawer - type filter cartridge can only be pulled out in the horizontal direction after it first moves a predetermined distance in the vertical direction.

[0012] Preferably, the limiting mechanism includes a limiting plate arranged on the front side of the box body. The drawer - type filter cartridge includes a main frame and a panel. The panel is fixedly arranged at the front end of the main frame, and a handle is also fixedly arranged on the front side of the panel. A recess is formed between the panel and the main frame. When the drawer - type filter cartridge is installed in the filter chamber, the recess cooperates with the limiting plate so that the limiting plate is inserted into the recess, thereby restricting the movement of the drawer - type filter cartridge in the horizontal direction. After the drawer - type filter cartridge can move a certain distance in the vertical direction, when the recess is separated from the limiting plate, the drawer - type filter cartridge is then allowed to be pulled out in the horizontal direction.

[0013] Preferably, the drawer - type filter cartridge further includes

[0014] A cover plate, which is detachably installed in the main frame. Multiple pressing ribs are arranged at intervals in the cover plate, and a water inlet gap is formed between adjacent pressing ribs.

[0015] Filter cotton, which is placed in the accommodation space formed between the cover plate and the main frame. The filter cotton is any one or a combination of sponge - like filter cotton, fibrous filter cotton, activated carbon filter cotton, and biochemical ball filter cotton.

[0016] Preferably, it further includes

[0017] A top cover, which is detachably installed on the box body and is used to cover the filter chamber.

[0018] A rain - shower box, which is fixed to the lower end of the top cover.

[0019] Wherein, the rain - shower box is communicated with the water supply mechanism and is used to receive and disperse the water conveyed by the water supply mechanism. A plurality of diversion ports are arranged at the lower end of the rain - shower box.

[0020] Preferably, the water supply mechanism includes

[0021] A water pump, which is used to pump the water in the fish tank.

[0022] The water inlet pipe, one end of which is connected to the inlet of the water pump;

[0023] The water outlet pipe, one end of which is connected to the outlet of the water pump, and the other end extends into the rain box.

[0024] Preferably, it further includes an oil film processor, and the oil film processor includes,

[0025] A pipe, which is communicated with the water inlet pipe;

[0026] An adsorption end cover, which is arranged at the upper end of the pipe and close to the water surface;

[0027] Wherein, a plurality of guiding ribs are circumferentially and uniformly arranged on the end surface of the adsorption end cover, the plurality of guiding ribs are spirally distributed, and a water inlet gap communicated with the pipe is formed between adjacent guiding ribs.

[0028] Preferably, biochemical filter media are placed in the biochemical filter box, and the biochemical filter media are any one or a combination of quartz balls, ceramic rings, and biochemical balls.

[0029] Preferably, the bottom of the filter chamber has an inclined surface, a plurality of support ribs are fixedly arranged at intervals on the inclined surface, the biochemical filter box is placed between the plurality of support ribs, a vertically distributed water baffle is further fixed at the bottom of the filter chamber, the water baffle is arranged close to the water outlet, and a notch is formed on one side of the water baffle.

[0030] The second object of the present utility model is to provide a fish tank, which includes a tank body and a cover body movably arranged on the tank body, and further includes a drawer-type filtration system, and the drawer-type filtration system is arranged in the tank body.

[0031] Compared with the prior art, the advantages of the present utility model are as follows: This filtration system solves the problem of difficult maintenance of traditional fish tank filters, and at the same time improves the convenience and safety of use. The inside of the box body is provided with a filter chamber, and the side wall has a water outlet. A water supply mechanism is equipped to pump the fish tank water into the filter chamber. The biochemical filter box and the drawer-type filter box are sequentially arranged from bottom to top inside the filter chamber. This vertical layout makes full use of the gravity effect to ensure that the water flow can pass through different filter layers in sequence. The drawer-type filter box is installed in a drawer-type insertion manner and is located above the biochemical filter box, which is convenient for being taken out separately for maintenance. The most crucial is the design of the limiting mechanism, which restricts the movement of the drawer-type filter box, requiring the filter box to move a certain distance in the vertical direction first before it can be horizontally pulled out. This design not only prevents the filter box from accidentally sliding out, but also forms a sealing effect when taken out to avoid sewage overflow.

[0032] In summary, the above design greatly simplifies the maintenance process. Users can replace or clean the filter material without contacting the sewage, improving the hygiene and safety. At the same time, since the entire filter does not need to be frequently disassembled, the service life of the equipment is extended and the reliability of the system is improved. Brief Description of the Drawings

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the provided drawings.

[0034] Figure 1 Schematic perspective view of the three-dimensional structure of the first embodiment of the present utility model;

[0035] Figure 2 Schematic perspective view of the three-dimensional structure in the disassembled state of the first embodiment of the present utility model;

[0036] Figure 3 Schematic perspective view of the three-dimensional structure of the box body in the first embodiment of the present utility model;

[0037] Figure 4 Schematic perspective view of the three-dimensional structure of the top cover in the first embodiment of the present utility model;

[0038] Figure 5 Schematic perspective view of the three-dimensional structure of the drawer-type filter cartridge in the first embodiment of the present utility model;

[0039] Figure 6 Schematic perspective view of the three-dimensional structure in the disassembled state of the drawer-type filter cartridge in the first embodiment of the present utility model;

[0040] Figure 7 Schematic perspective view of the three-dimensional structure of the water supply mechanism in the first embodiment of the present utility model;

[0041] Figure 8 Schematic perspective view of the three-dimensional structure of the adsorption end cover in the first embodiment of the present utility model;

[0042] Figure 9 Schematic perspective view of the three-dimensional structure of the second embodiment of the present utility model;

[0043] In the figure, 1 is a drawer-type filtration system; 2 is a box body; 3 is a water inlet mechanism; 4 is a filter chamber; 5 is a water outlet; 6 is a biochemical filter box; 7 is a drawer-type filter box; 8 is a limiting mechanism; 9 is a limiting plate; 10 is a main frame; 11 is a panel; 12 is a handle; 13 is a depression; 14 is a cover plate; 15 is a bead; 16 is a water inlet gap; 17 is a top cover; 18 is a rain box; 19 is a diversion port; 20 is a water pump; 21 is an upper water pipe; 22 is an outlet pipe; 23 is an oil film processor; 24 is a pipeline; 25 is an adsorption end cover; 26 is a guiding rib; 27 is an inclined surface; 28 is a supporting rib; 29 is a water baffle; 30 is a notch; 31 is a fish tank; 32 is a tank body; 33 is a cover body. Detailed implementation mode

[0044] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0045] Embodiment 1: As shown in the figure, a drawer-type filtration system 1 includes a box body 2 and a water inlet mechanism 3. There is a filter chamber 4 inside the box body 2, and a water outlet 5 is provided on the side wall of the box body 2. The water inlet mechanism 3 is used to pump the water in the fish tank 31 into the filter chamber 4. It also includes

[0046] A biochemical filter box 6, which is arranged in the filter chamber 4;

[0047] A drawer-type filter box 7, which is installed in the filter chamber 4 in a drawer-type insertion manner and is located above the biochemical filter box 6;

[0048] A limiting mechanism 8, which is arranged between the drawer-type filter box 7 and the box body 2 and is used to limit the movement of the drawer-type filter box 7;

[0049] Among them, the limiting mechanism 8 restricts the movement of the drawer-type filter box 7 in the horizontal direction, and the drawer-type filter box 7 can only be pulled out in the horizontal direction after it first moves a predetermined distance in the vertical direction.

[0050] In this embodiment, the limiting mechanism 8 includes a limiting plate 9 arranged on the front side of the box body 2. The drawer-type filter cartridge 7 includes a main frame 10 and a panel 11. The panel 11 is fixedly arranged at the front end of the main frame 10. A handle 12 is also fixedly arranged on the front side of the panel 11. A recess 13 is formed between the panel 11 and the main frame 10. When the drawer-type filter cartridge 7 is installed in the filter chamber 4, the recess 13 cooperates with the limiting plate 9, so that the limiting plate 9 is inserted into the recess 13, thereby restricting the movement of the drawer-type filter cartridge 7 in the horizontal direction. When the drawer-type filter cartridge 7 can move a certain distance in the vertical direction and then the recess 13 is separated from the limiting plate 9, the drawer-type filter cartridge 7 is allowed to be pulled out in the horizontal direction.

[0051] In the above structure, the limiting mechanism 8 is composed of the limiting plate 9 on the front side of the box body 2 and the structure of the drawer-type filter cartridge 7. The drawer-type filter cartridge 7 includes a main frame 10 and a panel 11 fixed at its front end. A handle 12 is also arranged on the front side of the panel 11 for convenient operation. The key design lies in the recess 13 formed between the panel 11 and the main frame 10. This recess 13 cooperates with the limiting plate 9 to form a simple and effective locking mechanism. When the filter cartridge is installed in place, the limiting plate 9 is inserted into the recess 13, firmly restricting the movement of the filter cartridge in the horizontal direction and preventing accidental sliding out or water leakage.

[0052] The above design not only ensures the stability during daily use, but also effectively prevents the displacement of the filter cartridge caused by water flow impact or other external forces. When the user needs to take out the filter cartridge for maintenance, the user only needs to lift the filter cartridge slightly upward by a certain distance to separate the recess 13 from the limiting plate 9, and then the filter cartridge can be easily pulled out in the horizontal direction. This two-step removal method is simple and intuitive, and can effectively prevent misoperation, greatly reducing the risk of sewage overflow during the maintenance process. At the same time, this design also enables the filter cartridge to be accurately positioned when reinstalled, ensuring correct positioning every time.

[0053] In this embodiment, the drawer-type filter cartridge 7 further includes,

[0054] a cover plate 14 detachably installed in the main frame 10. A plurality of ribbing 15 are arranged at intervals in the cover plate 14, and a water inlet gap 16 is formed between adjacent ribbing 15;

[0055] filter cotton placed in the accommodation space formed between the cover plate 14 and the main frame, and the filter cotton is any one or a combination of sponge-like filter cotton, fibrous filter cotton, activated carbon filter cotton, and biochemical ball filter cotton.

[0056] In the above structure, multiple reinforcing ribs 15 arranged at intervals inside the cover plate 14 not only enhance the structural strength but also form water inlet gaps 16 between adjacent reinforcing ribs 15, ensuring that water flow can be evenly distributed across the entire surface of the filter media, making full use of the filtering capacity of the filter media. The detachable feature of the cover plate 14 makes it extremely simple to replace or clean the filter media. Users can easily access the internal filter media by removing the cover plate 14.

[0057] Diverse options are selected for the filter media, including sponge-like filter cotton, fibrous filter cotton, activated carbon filter cotton, and biochemical ball filter cotton. Users can choose a single type or a combination of multiple types according to actual needs. This flexibility enables the system to handle different water quality problems: Sponge-like and fibrous filter cotton are mainly used for mechanical filtration to remove suspended particles in water; activated carbon filter cotton can effectively adsorb harmful substances and odors in water; biochemical ball filter cotton provides good biological filtration function, helping to decompose organic substances in water. The accommodation space formed between the cover plate 14 and the main frame not only provides sufficient placement area for the filter media but also ensures that water flow must pass through the filter media, maximizing the filtration effect.

[0058] Therefore, the above design not only improves the filtration efficiency but also greatly simplifies the maintenance process. Users can easily adjust the filter media combination according to different water quality requirements to achieve personalized water quality management.

[0059] In this embodiment, it further includes,

[0060] A top cover 17, detachably mounted on the box body 2 for covering the filter chamber 4;

[0061] A rain shower box 18, fixed to the lower end of the top cover 17;

[0062] Wherein, the rain shower box 18 is communicated with the water supply mechanism 3 for receiving and dispersing the water conveyed by the water supply mechanism 3. A plurality of diversion openings 19 are provided at the lower end of the rain shower box 18.

[0063] In the above structure, the detachable top cover 17 not only seals the filter chamber 4 to prevent dust from entering and moisture from evaporating, but also facilitates daily inspection and maintenance by the user. The rain box 18 is directly connected to the water supply mechanism 3 and becomes the core component for water flow distribution. The main function of the rain box 18 is to receive and evenly disperse the water delivered by the water supply mechanism 3, and the multiple diversion ports 19 provided at its lower end further optimize the water flow distribution. This design mimics the rainfall process in nature, enabling the water to be evenly sprinkled on the filter material below in a rain-like manner, greatly increasing the contact area and contact time between the water and the filter material. The evenly distributed water flow can not only make full use of the filtering capacity of the entire filtration system, but also prevent the local filter material from failing too quickly due to concentrated water flow. The design of the multiple diversion ports 19 can also reduce the impact force of the water flow, reduce mechanical damage to the filter material, and extend its service life. In addition, this rain-like water flow distribution method can also increase the dissolved oxygen content in the water, which is beneficial to the progress of biochemical filtration.

[0064] In this embodiment, the water supply mechanism 3 includes,

[0065] a water pump 20 for pumping water in the fish tank 31;

[0066] an upper water pipe 21, one end of which is connected to the inlet of the water pump 20;

[0067] an outlet water pipe 22, one end of which is connected to the outlet of the water pump 20 and the other end extends into the rain box 18.

[0068] In the above structure, the water pump 20 serves as the power source and is responsible for pumping the water to be filtered from the fish tank 31. The upper water pipe 21 is connected to the inlet of the water pump 20 to ensure that the water pump 20 can continuously draw water from the fish tank 31. The outlet water pipe 22 connects the outlet of the water pump 20 and the rain box 18, forming a complete water circuit system.

[0069] The advantages of the above design are mainly reflected in the following aspects: First, the structure is simple, reducing the possible failure links and improving the reliability and durability of the system. Second, the water circuit design is direct and efficient, minimizing the water flow resistance to the greatest extent, improving the working efficiency of the water pump 20, and saving energy consumption. Third, the outlet water pipe 22 directly extends into the rain box 18, ensuring that the water flow can be evenly distributed to all parts of the filtration system, making full use of the surface area of the filter material and improving the filtration effect.

[0070] In this embodiment, it further includes an oil film processor 23, and the oil film processor 23 includes,

[0071] a pipe 24, which is connected and communicated with the upper water pipe 21;

[0072] an adsorption end cover 25, which is arranged at the upper end of the pipe 24 and is close to the water surface;

[0073] Among them, a plurality of guiding ribs 26 are circumferentially and uniformly arranged on the end face of the adsorption end cover 25. The plurality of guiding ribs 26 are spirally distributed, and a water inlet gap communicating with the pipeline 24 is formed between adjacent guiding ribs 26.

[0074] In the above structure, the adsorption end cover 25 is provided with a plurality of spiral guiding ribs 26 that are circumferentially and uniformly arranged on its end face. This ingenious design makes a water inlet gap communicating with the pipeline 24 formed between adjacent guiding ribs 26. Its working principle is as follows: When the water pump 20 operates, the suction force generated through the pipeline 24 will cause the oil film on the water surface to be sucked into the water inlet gap along with the water flow. The spirally distributed guiding ribs 26 can create a vortex effect, enhancing the adsorption capacity for the oil film and also preventing a large amount of air from entering the system.

[0075] The advantages of the above design are mainly reflected in the following aspects: First, it can effectively remove the oil film on the water surface, improving water quality and aesthetics; Second, the design of the spiral guiding ribs 26 increases the efficiency of oil-water separation, making the oil film easier to be adsorbed; Third, the uniformly distributed water inlet gaps ensure comprehensive coverage of the entire water surface, avoiding the generation of dead corners; In addition, this design can also prevent fish or other aquatic organisms from being accidentally sucked in; Finally, since this device is directly connected to the existing water supply system, no additional power device is required, saving energy and reducing the system complexity.

[0076] In this embodiment, biochemical filter media are placed in the biochemical filter box 6, and the biochemical filter media are any one or a combination of quartz balls, ceramic rings, and biochemical balls.

[0077] This design uses quartz balls, ceramic rings, and biochemical balls as optional biochemical filter media. Users can choose a single type or a combination of multiple types according to specific needs. This diverse selection greatly improves the adaptability and efficiency of the filtration system. Quartz balls have excellent mechanical filtration ability and can effectively remove suspended particles in water; The ceramic ring provides a large surface area due to its porous structure and is very suitable for the growth of beneficial bacteria, enhancing the biological filtration effect; Biochemical balls not only have good biological filtration functions but also can adsorb harmful substances in water. The combined use of these materials creates a multi-level filtration system that can simultaneously perform mechanical filtration, biological filtration, and chemical filtration.

[0078] The working principle of the biochemical filter box 6 is to utilize the large surface area provided by these filter media to cultivate beneficial bacteria. These bacteria can decompose harmful substances such as ammonia and nitrite in water and convert them into relatively harmless nitrates, thereby maintaining the ecological balance of the water body.

[0079] In this embodiment, the bottom of the filter chamber 4 has an inclined surface 27, on which multiple support ribs 28 are fixedly arranged at intervals. The biochemical filter cartridge 6 is placed between the multiple support ribs 28. A vertically distributed water baffle 29 is also fixed to the bottom of the filter chamber 4. The water baffle 29 is arranged close to the water outlet 5, and a notch 30 is formed on one side of the water baffle 29.

[0080] In the above structure, the multiple support ribs 28 fixedly arranged at intervals not only provide stable support for the biochemical filter cartridge 6, but also allow water to flow freely at the bottom, preventing the formation of dead corners. This design forms a water flow channel between the biochemical filter cartridge 6 and the bottom of the filter chamber 4, effectively increasing the contact area and time between water and the biochemical filter media, and improving the efficiency of biochemical filtration.

[0081] The vertically distributed water baffle 29 is arranged close to the water outlet 5. Its main function is to control the water flow direction and speed. The notch 30 on one side of the water baffle 29 controls the water speed and flow direction, ensuring that sufficient water flows through the biochemical filter cartridge 6 while preventing the water flow from being too fast and affecting the filtration effect. This design also prevents the biochemical filter media from being accidentally drawn into the water outlet 5.

[0082] Embodiment 2: As shown in the figure, a fish tank 31 includes a tank body 32 and a cover body 33 movably arranged on the tank body 32, and also includes the drawer-type filtration system 1 in Embodiment 1. The drawer-type filtration system 1 is arranged inside the tank body 32.

[0083] The main frame of the fish tank 31 is composed of the tank body 32 and the movably arranged cover body 33. This structure not only maintains the basic functions of the traditional fish tank 31, but also provides better protection and isolation effects through the movable cover body 33, helping to reduce water evaporation, prevent dust from entering, and isolate external interference to a certain extent, creating a more stable living environment for fish.

[0084] The core of this design is to integrate the drawer-type filtration system 1 into the interior of the tank body 32. This design has multiple advantages: First, it saves extra space, making the overall fish tank 31 more compact and beautiful; Second, the built-in filtration system can make more effective use of the water body space and improve the filtration efficiency; Third, the drawer-type design greatly simplifies the daily maintenance and cleaning work. Users can easily draw out the filtration unit for cleaning or replacing the filter media without a complex disassembly process, improving the safety and reliability of the overall system.

[0085] The above are only the embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made by using the content of the specification and drawings of the present application, or directly or indirectly applied in other related technical fields, shall be included in the patent protection scope of the present application by the same token.

Claims

1. A drawer-type filtration system, comprising a box body and a water inlet mechanism. A filter chamber is provided inside the box body, and a water outlet is provided on the side wall of the box body. The water inlet mechanism is used to pump the water in the fish tank into the filter chamber, and is characterized in that: It further includes, a biochemical filter box disposed in the filter chamber; a drawer-type filter box installed in the filter chamber in a drawer-type insertion manner and located above the biochemical filter box; a limiting mechanism disposed between the drawer-type filter box and the box body for restricting the movement of the drawer-type filter box; wherein, the limiting mechanism restricts the movement of the drawer-type filter box in the horizontal direction, and the drawer-type filter box can be withdrawn in the horizontal direction only after it first moves a predetermined distance in the vertical direction.

2. The drawer type filtration system according to claim 1, wherein: The limiting mechanism includes a limiting plate disposed on the front side of the box body. The drawer-type filter box includes a main frame and a panel. The panel is fixedly arranged at the front end of the main frame, and a handle is also fixedly arranged on the front side of the panel. A recess is formed between the panel and the main frame. When the drawer-type filter box is installed in the filter chamber, the recess cooperates with the limiting plate so that the limiting plate is inserted into the recess, thereby restricting the movement of the drawer-type filter box in the horizontal direction; When the drawer-type filter box can move a certain distance in the vertical direction, after the recess is separated from the limiting plate, the drawer-type filter box is then allowed to be withdrawn in the horizontal direction.

3. A drawer-type filtration system according to claim 2, characterized in that: The drawer-type filter box further includes, a cover plate detachably installed in the main frame. Multiple pressing ribs are spacedly arranged in the cover plate, and a water inlet gap is formed between adjacent pressing ribs; filter cotton placed in the accommodation space formed between the cover plate and the main frame, wherein the filter cotton is any one or a combination of sponge-like filter cotton, fibrous filter cotton, activated carbon filter cotton, and biochemical ball filter cotton.

4. A drawer-type filtration system according to claim 1, characterized in that: It further includes, a top cover detachably installed on the box body for covering the filter chamber; a rain box fixed to the lower end of the top cover; wherein, the rain box is communicated with the water supply mechanism for receiving and dispersing the water conveyed by the water supply mechanism, and a plurality of diversion ports are arranged at the lower end of the rain box.

5. A drawer-type filtration system according to claim 4, characterized in that: The water supply mechanism includes, a water pump for pumping water in the fish tank; an upper water pipe, one end of which is connected to the inlet of the water pump; an outlet pipe, one end of which is connected to the outlet of the water pump and the other end extends into the rain box.

6. A drawer-type filtration system according to claim 5, wherein: It further includes an oil film processor, and the oil film processor includes, a pipeline communicated with the upper water pipe; an adsorption end cover disposed at the upper end of the pipeline and close to the water surface; wherein, a plurality of guiding ribs are circumferentially and uniformly arranged on the end surface of the adsorption end cover, and the plurality of guiding ribs are spirally distributed, and a water inlet gap communicated with the pipeline is formed between adjacent guiding ribs.

7. A drawer-type filtration system according to claim 1, wherein: The biochemical filter box contains biochemical filter materials, and the biochemical filter materials are any one or a combination of quartz balls, ceramic rings, and biochemical balls.

8. A drawer-type filtration system according to claim 1, wherein: The bottom of the filter chamber has an inclined surface, and a plurality of support ribs are spacedly and fixedly arranged on the inclined surface. The biochemical filter box is placed between the plurality of support ribs. A vertically distributed water baffle is also fixedly arranged at the bottom of the filter chamber. The water baffle is arranged close to the water outlet, and a notch is formed on one side of the water baffle.

9. A fish tank, comprising a tank body and a cover body movably arranged on the tank body, characterized in that: It further includes the drawer-type filtering system according to any one of claims 1-8, and the drawer-type filtering system is arranged in the cylinder body.

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