Bottom filter fish tank

Abstract

The utility model relates to a kind of bottom filter type fish tanks, including cylinder body, bottom filter assembly, upper water pipe assembly, cap and water pump;The bottom filter assembly is located at the bottom of the cylinder body, the bottom filter assembly is opened with the bottom filter mouth and bottom water inlet that are connected;The upper water pipe assembly is located in the cylinder body, the upper water pipe assembly is formed in the axial through upper water channel, and water outlet is formed on the outside, the bottom end of the upper water channel is connected with the bottom water inlet, and the top end forms drain outlet;The cap is detachably covered in the drain outlet, to form the return flow channel between the drain outlet and the water outlet, the water pump is located in the flow channel between the bottom filter mouth and the water outlet. Fish tank's drainage and circulation switching are more smooth and simple, and structure maintenance is facilitated simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of aquarium technology, and in particular to a bottom-filtered fish tank. Background Technology

[0002] In the aquarium industry, sump-filter aquariums are widely popular due to their high-efficiency filtration performance and aesthetically pleasing design. Sump-filter aquariums typically place the filter assembly at the bottom of the tank, using a water pump to circulate the water, allowing it to flow through the filter structure to remove impurities and degrade harmful substances, thus maintaining clean and stable water quality. At the same time, the sump-filter design makes full use of the space at the bottom of the aquarium, avoiding the filter structure taking up too much side space and affecting the overall aesthetics and harmony of the aquarium.

[0003] For bottom-filtered aquariums, the water circulation system needs to guide the water filtered by the bottom filter to a higher level, allowing the filtered water to circulate from the surface back into the aquarium. Furthermore, since water needs to be drained from the aquarium for replacement, a rotary valve is typically installed between the circulation channel and the drain outlet to control the water circulation or drainage. However, in this design, if the rotary valve becomes clogged, it may not rotate completely, causing water to flow out from both the circulation channel and the drain outlet simultaneously, disrupting the normal water system. Additionally, this rotary valve structure is difficult to remove from the piping, making cleaning and maintenance challenging. Utility Model Content

[0004] Therefore, it is necessary to provide a bottom-filtered aquarium to make the drainage and circulation switching of the aquarium smoother and simpler, while also facilitating structural maintenance.

[0005] An embodiment of this utility model provides a bottom-filtered aquarium, including a tank body, a bottom filter assembly, a water inlet pipe assembly, a cap, and a water pump; the bottom filter assembly is located at the bottom of the tank body, and the bottom filter assembly has a connected bottom filter port and a bottom water inlet;

[0006] The water supply pipe assembly is located inside the cylinder body, forming an axially penetrating water supply channel within the water supply pipe assembly, and forming a water outlet on the outer side. The bottom end of the water supply channel is connected to the bottom water inlet, and the top end forms a drain outlet. The cap is detachably placed on the drain outlet to form a zigzag flow channel between the drain outlet and the water outlet. The water pump is located in the flow channel formed between the bottom filter and the water outlet.

[0007] Compared to existing technologies, the bottom-filter aquarium provided in this application uses a cap mechanism installed within the water inlet assembly to form a zigzag flow channel. This allows the rising water, filtered by the bottom filter assembly, to return to the tank through the outlet for circulation. When the cap is detached from the drain outlet, the user can drain the water out of the tank. This structure makes switching between the aquarium's drainage and circulation functions smoother and simpler. Furthermore, the cap can be detached from the drain outlet to remove the cover, facilitating cleaning and maintenance.

[0008] In one embodiment, the water supply pipe assembly includes a main pipe body and a water outlet. The main pipe body forms the water supply channel, and the water outlet is connected to the side wall of the main pipe body and located below the cap. The water outlet is formed in the water outlet, and a deflection channel is formed between the water outlet and the outer wall of the main pipe body. Water flows through the outer wall of the main pipe body to the water outlet and then circulates back into the cylinder. This structure makes full use of the radial internal and external space of the main pipe body, allowing for a more compact circulation system.

[0009] In one embodiment, both the cap and the water outlet are fitted onto the outer wall of the main pipe body. The cap and the water outlet abut against each other in the axial direction, and there is a gap between the water outlet and the cap and the outer wall of the main pipe body to form part of the deflection channel. The cap and the water outlet abut against each other and together surround the main pipe body to form a water outlet channel between themselves and the outer wall of the main pipe body. This structure uses the existing cap and water outlet to form the sidewall of the water flow channel, reducing additional accessories, making the overall structure simpler and the assembly cost lower.

[0010] In one embodiment, the spacer has an annular structure. By utilizing the relationship between the cap and the outlet fitting over the main body, the flow channel between them and the main body is designed as an annular structure, which significantly increases the water flow channel and allows for a larger water output.

[0011] In one embodiment, the water inlet pipe assembly further includes a support member disposed on the outer wall of the main pipe body. Both the cap and the water outlet are detachably fitted onto the outer wall of the main pipe body, and the water outlet is supported by the support member. The cap and water outlet are not integral with the main pipe body or present molding difficulties, thus allowing for a detachable relationship. Furthermore, by providing the support member, the water outlet above can be held in place, preventing the water outlet from sliding down the main pipe body due to the force of the water flow and thus maintaining the airtightness of the return flow channel.

[0012] In one embodiment, the support member is a rubber ring structure, fitted onto the outer wall of the main pipe body. The top of the support member forms an annular recessed groove, and the bottom of the water outlet is engaged within this groove. In the zigzag flow channel, water flows downwards from the cap side towards the water outlet. Therefore, the support member below the water outlet adopts an annular rubber structure. This elastic structure fits around the main pipe body and embeds the bottom of the water outlet within it, effectively preventing water with high impact force from leaking through the gap between the water outlet and the main pipe body.

[0013] In one embodiment, the bottom-filter aquarium further includes a hook fastener, which is sleeved and connected to the outer wall of the water outlet and the cap, with the bottom of the hook fastener supported by the water outlet. The hook fastener is attached to the top of the aquarium body. The hook fastener can fix the upper end of the water supply pipe assembly to the top of the aquarium body, thus securing the upper end of the water supply pipe assembly and preventing swaying when water flows inside, improving stability. At the same time, the hook fastener can also cover the cap and the water outlet, improving the connection stability between the cap and the water outlet, and increasing the sealing at the connection between the two.

[0014] In one embodiment, the top of the hook-and-loop fastener forms an assembly opening, through which the top end of the main body passes. The cap is detachably fixed in the assembly opening and surrounds the main body. The hook-and-loop fastener provides an assembly opening for the cap, allowing it to be fixed to the hook-and-loop fastener without requiring a fixing structure on the main body. This facilitates increasing the flow channel cross-section between the cap and the main body, thereby increasing the flow rate.

[0015] In one embodiment, the bottom filter assembly includes a bottom filter plate, with a bottom filter port formed on the bottom filter plate. A first flow channel is formed between the bottom filter plate and the bottom of the cylinder body. The bottom filter plate also has an installation port, and the first flow channel connects the bottom filter port and the installation port. A bottom mounting plate is connected to the bottom of the main pipe body and fixed to the installation port. The water pump is fixed to the bottom mounting plate and extends into the installation port. The water pump's inlet is located in the installation port, and its outlet is connected to the upper water flow channel. The water pump, installed at the bottom of the main pipe body, pumps water upwards into the upper water flow channel. This design keeps the center of gravity of the upper water pipe assembly low, improving the stability of the main pipe body during operation. Furthermore, the water pump being submerged in water prevents dry running.

[0016] In one embodiment, the cap forms an installation cavity inside, which covers the top of the water supply pipe assembly to block the drain outlet. A gap exists between the bottom of the installation cavity and the drain outlet to form a partial return flow channel. The cap completely covers the upper end of the water supply pipe assembly, ensuring the drain outlet is located within the installation cavity. Water flowing from the drain outlet through the water supply channel will not overflow but will instead bend back towards the outlet within the installation cavity along the return flow channel. The cap ensures a tight seal at the water return point after covering the water supply pipe assembly. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0018] Figure 1 This is a schematic diagram of a fish tank structure in a drainage configuration according to an embodiment of this application;

[0019] Figure 2 for Figure 1 A magnified view of region A shown in the image;

[0020] Figure 3 This is a cross-sectional view of a fish tank in a circulating water filtration configuration according to an embodiment of this application;

[0021] Figure 4 for Figure 3 A magnified view of region B shown in the image;

[0022] Figure 5 An exploded view of a fish tank provided in one embodiment of this application;

[0023] Figure 6 Figure 5 The enlarged view of region C shown in the image.

[0024] Figure label:

[0025] Cylinder block 10; foldback channel 101; partition space 102; bottom filter assembly 20; bottom filter plate 210; bottom filter port 211; mounting port 212; first flow channel 213; water supply pipe assembly 30; main pipe body 31; water supply channel 301; water inlet 302; drain port 303; water outlet 304; water outlet component 310; support component 320; embedded groove 321; bottom mounting plate 34; cap 40; mounting cavity 410; water pump 50; hook fastener 60; assembly port 601. Detailed Implementation

[0026] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to 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 of this utility model.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0030] In the aquarium industry, bottom-filter aquariums are widely popular due to their high-efficiency filtration performance and aesthetically pleasing design. Bottom-filter aquariums typically place the filter assembly at the bottom of the water column, using a water pump to circulate the water and guide the filtered water to a higher level, allowing it to circulate back into the aquarium. However, common water inlet designs often struggle to effectively balance the flow between the circulation outlet and the drain, resulting in overly complex structures requiring multiple accessories. Furthermore, conventional water flow switching mechanisms, such as rotary valves, are difficult to disassemble, clean, and maintain. Therefore, this application provides a bottom-filter aquarium that simplifies drainage and circulation switching while also facilitating structural maintenance.

[0031] refer to Figures 1 to 4 The bottom-filtered aquarium provided in this application embodiment includes a tank body 10, a bottom filter assembly 20, a water inlet pipe assembly 30, a cap 40, and a water pump 50; the bottom filter assembly 20 is located at the bottom of the tank body 10, and the bottom filter assembly 20 has a connected bottom filter port 211 and a bottom water inlet 302.

[0032] The water inlet pipe assembly 30 is located inside the cylinder body 10. An axial water inlet channel 301 is formed inside the water inlet pipe assembly 30, and an outlet 304 is formed on the outside. The bottom end of the water inlet channel 301 is connected to the bottom water inlet 302, and the top end forms a drain outlet 303. The cap 40 is detachably covered on the drain outlet 303 to form a zigzag channel 101 between the drain outlet 303 and the outlet 304. The water pump 50 is located in the channel formed between the bottom filter port 211 and the outlet 304.

[0033] Combination Figure 1 and Figure 2 When the user needs to drain the water from the cylinder 10, the cap 40 is removed, and then a hose is connected to the drain port 303 so that the water flows out from the hose.

[0034] Combination Figure 3 and Figure 4 When the user needs to use the circulating filtration function, the cap 40 is closed to form a reversal channel 101, so that the water flowing out of the drain 303 reaches the outlet 304 through the reversal channel 101 and then flows back into the cylinder 10.

[0035] The bottom filter assembly 20 has a preliminary filtration function, which can filter out large particulate impurities in the water. Furthermore, a layer of sand and gravel is laid above the bottom filter inlet 211, which can further filter out small particulate impurities in the water.

[0036] Both the bottom filter assembly 20 and the water inlet assembly 30 are housed within the tank body 10, allowing the entire aquarium to be made more compact and suitable for use as a desktop aquarium. By providing a circulation outlet 304 and a replacement water outlet 303 on the water inlet assembly 30, and by using a cap 40 to cover and remove the drain outlet 303 to switch between circulation and drainage functions, the difficulty of switching water circuits is greatly reduced. Furthermore, users can remove the cap 40 for cleaning or replacement, and also clean the drain outlet 303.

[0037] Compared to typical bottom-filtration systems, the aquarium provided in this application uses a cap 40 mechanism installed within the water inlet assembly 30 to form a zigzag flow channel 101. This allows the rising water, filtered by the bottom filter assembly 20, to return to the tank body 10 through the outlet 304 for circulation. When the cap 40 is detached from the drain outlet 303, the user can drain the water from the tank body 10 through the drain outlet 303. This structure makes switching between the aquarium's drainage and circulation functions smoother and simpler. Furthermore, the cap 40 can be detached from the drain outlet 303 to remove the cover, facilitating cleaning and maintenance.

[0038] Regarding the water supply pipe assembly 30, the water supply pipe assembly 30 includes a main pipe body 31 and a water outlet 310. A water supply channel 301 is formed inside the main pipe body 31, extending through both ends of the main pipe body 31 along its axial direction. The main pipe body 31 can generally be a columnar structure, with its length direction within the cylinder 10 parallel to the height direction of the cylinder 10, or it can be inclined. The water outlet 310 is connected to the side wall of the main pipe body 31 and located below the cap 40. A water outlet 304 is formed in the water outlet 310, and a portion of the return flow channel 101 is formed between the water outlet 310 and the outer wall of the main pipe body 31. The water outlet 310 can be integrally formed with the main pipe body 31, or it can be detachably connected to the main pipe body 31, for example, through a snap-fit ​​connection, fastener connection, or threaded connection. The cap 40 can be directly or indirectly connected to the main pipe 31. The cap 40 is used to block the water flow from the upper water channel 301 to the drain outlet 303, causing the water flow to be blocked and deflected downwards towards the outer wall of the main pipe 31. The cap can be made of elastic rubber material to improve the tightness of the connection between it and the upper water pipe assembly 30.

[0039] After being filtered by the bottom filter assembly 20, the water flows from the bottom of the cylinder 10 to the top along the upper water flow channel 301. Then, under the obstruction of the cap 40, it turns back to the outer wall of the main pipe 31 and flows through the outer wall of the main pipe 31 to the outlet 304, and then circulates back into the cylinder 10. This structure makes full use of the radial inner and outer space of the main pipe 31, so that the size of the circulation system can be more compact.

[0040] refer to Figure 4In a further embodiment, both the cap 40 and the water outlet 310 are fitted onto the outer wall of the main pipe 31. The fitting relationship can be a direct connection or simply a spaced-around relationship. The cap 40 and the water outlet 310 abut against each other axially, which is the axial direction of the main pipe 31. A space 102 is provided between the water outlet 310 and the cap 40 and the outer wall of the main pipe 31 to form a partial reversing flow channel 101. To ensure the sealing of the reversing flow channel 101, the cap 40 can be made of rubber, ensuring a tight seal at the connection point when it abuts against the water outlet 310. The cap 40 and the water outlet 310 abut against and together surround the main pipe 31 to form a water outlet channel between themselves and the outer wall of the main pipe 31. This structure uses the existing cap 40 and water outlet 310 to form the sidewall of the water flow channel, reducing additional accessories, making the overall structure simpler, and lowering assembly costs. The cap 40, the water outlet 310 and the outer wall of the main pipe 31 together form the deflection channel 101, making full use of the radial space of the main pipe 31. This allows the radial dimension of the entire water circulation system to be effectively compressed, making the whole system more compact and efficient.

[0041] The cap 40 and the water outlet 310 can be configured as an annular structure or a partially annular structure. Due to the nesting relationship between the cap 40 and the water outlet 310 and the main pipe 31, the space 102 between them and the outer wall of the main pipe 31 can be configured as an annular structure surrounding the main pipe 31. This annular space 102 extends downwards to the vicinity of the water outlet 304 of the water outlet 310 and communicates with the water outlet 304. Water flowing out of the water outlet 304 and blocked by the cap 40, then turning back, can enter the annular space 102 from all sides and flow downwards to the water outlet 304. This significantly increases the water flow channel, resulting in a larger water output from the water outlet 304, while also fully utilizing the radial space of the main pipe 31. Alternatively, this space 102 can also be a vertically extending linear flow channel.

[0042] refer to Figure 4 In one embodiment, the cap 40 forms an installation cavity 410 inside, which covers the top of the water supply pipe assembly 30 to block the drain outlet 303. There is a gap between the bottom of the installation cavity 410 and the drain outlet 303 to form a partial reversal channel 101. The cap 40 can completely cover the upper end of the water supply pipe assembly 30, so that the drain outlet 303 is located in the installation cavity 410. The water flowing out of the drain outlet 303 through the water supply channel 301 will not overflow, but can only be reversed along the reversal channel 101 in the installation cavity 410 towards the outlet 304. After the cap 40 covers the water supply pipe assembly 30, it can ensure the sealing of the water flow reversal point.

[0043] On the other hand, since the water flow impact force against the outlet 310 due to the retraction of the cap 40 may be relatively large, if the outlet 310 is not fixedly connected to the main pipe 31, it may slide down relative to the main pipe 31 due to the force of the water flow. Therefore, it is advisable to refer to... Figure 4 and Figure 6 In some embodiments, the water supply pipe assembly 30 further includes a support member 320, which is disposed on the outer wall of the main pipe body 31. The cap 40 and the water outlet 310 are detachably fitted onto the outer wall of the main pipe body 31, and the water outlet 310 is supported by the support member 320. Thus, the cap 40 and the water outlet 310 are not integral structures with the main pipe body 31 or are difficult to demold, so they can be detached from the main pipe body 31. Furthermore, by providing the support member 320, the water outlet 310 can be held in place, preventing the water outlet 310 from sliding down the main pipe body 31 due to excessive water flow force, thus separating from the cap 40 and compromising the airtightness of the return flow channel 101.

[0044] The support member 320 can be a protrusion structure on the outer wall of the main pipe body 31, which can be integral with the main pipe body 31 or detachably connected to it. For example, the support member 320 has a rubber ring structure. The support member 320 is fitted onto the outer wall of the main pipe body 31 by elastic contraction to achieve a seal. The top of the support member 320 forms an annular inner groove 321, and the bottom end of the water outlet 310 is engaged in the inner groove 321. In the foldback channel 101, the water flows down from the cap 40 side to the water outlet 310. Therefore, the support member 320 below the water outlet 310 adopts an annular rubber structure. This elastic structure fits the main pipe body 31 and embeds the bottom of the water outlet 310 into it, which can effectively prevent water with large impact force from leaking from the gap between the water outlet 310 and the main pipe body 31. The outer wall of the main pipe body 31 can also be further provided with an integrally formed boss structure to support the support member 320.

[0045] For the columnar main pipe 31, although its lower end is fixed to the bottom of the bottom filter assembly 20 or the tank 10, its upper end may sway due to the impact of strong water flow. Therefore, this application also provides an embodiment in which a hook 60 is provided in the fish tank. The hook 60 is sleeved and connected to the outer wall of the water outlet 310 and the cap 40, and the bottom of the hook 60 is supported by the water outlet 310. The hook 60 is hooked to the top of the tank 10, so that the hook 60 can fix the top structure of the water supply pipe assembly 30 to the top of the tank 10, thereby effectively fixing both the upper and lower ends of the water supply pipe assembly 30. In this embodiment, the hook fastener 60 can fix the upper end of the water supply pipe assembly 30 to the top of the cylinder body 10, thus securing the upper end of the water supply pipe assembly 30 and preventing swaying when water flows inside, thereby improving stability. Simultaneously, the hook fastener 60 can also cover the cap 40 and the water outlet 310, improving the connection stability between the cap 40 and the water outlet 310, and increasing the sealing at the connection point. In other embodiments, the hook fastener 60 can also be directly fitted and fixed onto the main pipe body 31, and then hung on the top of the cylinder body 10 via the hook structure.

[0046] The top of the hook fastener 60 can form an assembly opening 601. The top end of the main body 31 passes through the assembly opening 601, and the cap 40 is detachably fixed in the assembly opening 601 and surrounds the main body 31. An annular protrusion can be provided on the wall of the assembly opening 601, and an annular groove adapted to the annular protrusion is provided on the outer wall of the cap 40. Thus, when the cap 40 is inserted into the assembly opening 601, it can be snapped and fixed through the structure of the annular protrusion and the annular groove; alternatively, the outer wall of the cap 40 and the assembly opening 601 can be respectively provided with compatible threaded structures, and the two are fixed by threaded connection. The cap 40 and the hook fastener can be fixed using any common and easily detachable fixing method, which will not be elaborated here. In this embodiment, the hook fastener 60 provides the assembly opening 601 for the cap 40, so that the cap 40 can be fixed on the hook fastener 60 without the need for a fixing structure on the main body 31. This helps to increase the flow channel cross-section between the cap 40 and the main body 31, increasing the flow rate.

[0047] refer to Figure 3 In a specific embodiment, the bottom filter assembly 20 includes a bottom filter plate 210, with a bottom filter port 211 opened on the bottom filter plate 210. A first flow channel 213 is formed between the bottom filter plate 210 and the bottom of the tank body 10. The bottom filter plate 210 effectively isolates impurities such as sand and aquatic plants at the bottom of the water body from the water pump 50, preventing sand and gravel from clogging the water passage of the water pump 50. In addition, the bottom filter plate 210 and the bottom panel are located under the aquascaping of sand and gravel, forming a hidden filtration space that does not occupy the side space of the tank body 10, thus ensuring the aesthetics of the aquarium.

[0048] refer to Figure 5The bottom filter plate 210 is also provided with an installation port 212. The first flow channel 213 connects the bottom filter port 211 and the installation port 212. The bottom of the main body 31 is connected to a bottom mounting plate 34, which is fixed to the installation port 212. The water pump 50 is fixed to the bottom mounting plate 34 and extends into the installation port 212. The inlet end of the water pump 50 is located in the installation port 212, and the outlet end is connected to the upper water flow channel 301. The water pump 50 is installed at the bottom of the main body 31, which can pump water upward to the upper water flow channel 301. This design can keep the center of gravity of the upper water pipe assembly 30 at a low position, which is beneficial to improve the stability of the main body 31 during operation. The fact that the water pump 50 is submerged in water can also prevent the problem of dry running. Of course, the water pump 50 can also be installed inside the main body 31 or near the drain port 303.

[0049] After the water pump 50 is installed on the water inlet pipe assembly 30, the two can be installed and removed simultaneously as a single structure at the mounting port 212. Due to turbulent water flow or collisions with fish, the water inlet pipe assembly 30 may become loose relative to the mounting port 212. To solve this problem, in the embodiments of this application, the mounting base plate can be inserted into the mounting port 212 along the height direction and transitionally fitted with the mounting port 212. For example, the structural dimensions of the mounting base plate inserted into the mounting port 212 can be the same as or slightly larger than the diameter of the mounting port 212, so that the two can provide damping through the structural elastic deformation during installation; or the mounting base plate and the mounting port 212 can be threaded together, with threads at the joint. The user can control the tightening or loosening by rotating the top of the water inlet pipe assembly 30 to rotate the mounting base plate synchronously relative to the mounting port 212, thereby achieving installation and removal. This transitional fit method can achieve smooth insertion and removal operations between the mounting base plate and the mounting part, making installation and removal very convenient. The threaded connection provides higher connection strength and stability between the mounting base and the mounting part, preventing the water pipe assembly 30 from falling off the mounting port 212 due to accidental collision or strong current impact.

[0050] The installation method between the water pump 50 and the mounting base plate can be varied, but the water pump 50 must remain stable relative to the mounting base plate and the water inlet pipe. Therefore, in some embodiments, at least two clips can be provided extending downwards from the bottom of the mounting base plate. These clips secure the water pump 50 to the mounting base plate, ensuring a tight seal between the water outlet 304 and the water inlet channel 301. This structure also facilitates quick installation and removal of the water pump 50 from the mounting base plate. Besides the clip-on connection method, the mounting base plate and the water pump 50 can also be fixed using common assembly methods such as fasteners.

[0051] In some embodiments, the aquarium also includes a top cover, which is disposed on the top of the aquarium body 10, with the top end of the main pipe 31 passing through the top cover. In some embodiments with a hook 60, the top cover can be pressed onto the hook 60 simultaneously, increasing the stability of the main pipe 31. In other embodiments, the top end of the main pipe 31 can also be snapped onto the top cover, providing support for the top end of the main pipe 31. This disperses the water flow collisions in the water supply pipe assembly 30 and the vibrations from the operation of the water pump 50 throughout the aquarium frame, greatly enhancing the vertical stability of the entire water supply pipe assembly 30 and preventing it from swaying or tilting.

[0052] The bottom-filter aquarium provided in the embodiments of this application has a smoother and simpler drainage and circulation switching, and is also easier to maintain.

[0053] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A bottom-filtered aquarium, characterized in that, It includes a cylinder body, a bottom filter assembly, a water inlet pipe assembly, a cap, and a water pump; the bottom filter assembly is located at the bottom of the cylinder body, and the bottom filter assembly has a connected bottom filter port and a bottom water inlet. The water supply pipe assembly is located inside the cylinder body, forming an axially penetrating water supply channel within the water supply pipe assembly, and forming a water outlet on the outer side. The bottom end of the water supply channel is connected to the bottom water inlet, and the top end forms a drain outlet. The cap is detachably placed on the drain outlet to form a zigzag flow channel between the drain outlet and the water outlet. The water pump is located in the flow channel formed between the bottom filter and the water outlet.

2. The bottom-filtered aquarium according to claim 1, characterized in that, The water supply pipe assembly includes a main pipe body and a water outlet. The water supply channel is formed inside the main pipe body. The water outlet is connected to the side wall of the main pipe body and located below the cap. The water outlet is formed on the water outlet. The deflection channel is formed between the water outlet and the outer wall of the main pipe body.

3. The bottom-filtered fish tank according to claim 2, characterized in that, Both the cap and the water outlet are fitted onto the outer wall of the main body. The cap and the water outlet abut against each other in the axial direction. There is a gap between the water outlet and the cap and the outer wall of the main body to form part of the deflection channel.

4. The bottom-filtered fish tank according to claim 3, characterized in that, The space between the spaces has a ring structure.

5. The bottom-filtered fish tank according to claim 3, characterized in that, The water supply pipe assembly also includes a support member, which is disposed on the outer wall of the main pipe body. The cap and the water outlet are detachably fitted onto the outer wall of the main pipe body, and the water outlet is supported by the support member.

6. The bottom-filtered fish tank according to claim 5, characterized in that, The support member has a rubber ring structure and is sleeved on the outer wall of the main body. The top of the support member forms an annular inner groove, and the bottom of the water outlet is engaged in the inner groove.

7. The bottom-filtered fish tank according to claim 2, characterized in that, It also includes a hook fastener, which is sleeved and connected to the outer wall of the water outlet and the cap, and the bottom of the hook fastener is supported by the water outlet. The hook fastener is attached to the top of the cylinder body.

8. The bottom-filtered fish tank according to claim 7, characterized in that, The top of the hook fastener forms an assembly opening, the top of the main body passes through the assembly opening, and the cap is detachably fixed in the assembly opening and surrounds the main body.

9. The bottom-filtered fish tank according to claim 2, characterized in that, The bottom filter assembly includes a bottom filter plate, with a bottom filter port opened on the bottom filter plate, forming a first flow channel between the bottom filter plate and the bottom of the cylinder body; the bottom filter plate also has an installation port, the first flow channel connecting the bottom filter port and the installation port, a bottom mounting plate connected to the bottom of the main body, the bottom mounting plate being fixed to the installation port, and the water pump being fixed to the bottom mounting plate and extending into the installation port; the water pump's inlet is located in the installation port, and its outlet is connected to the upper water flow channel.

10. The bottom-filtered fish tank according to claim 1, characterized in that, The cap has an internal mounting cavity that covers the top of the water inlet pipe assembly to block the drain outlet. There is a gap between the bottom of the mounting cavity and the drain outlet to form part of the foldback channel.

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