An external fish tank filter with water changing function

Abstract

The utility model discloses a kind of external fish tank filters with water changing function, including the shell for hanging on the cylinder body, the filter assembly for being located in shell and being used to filter in the cylinder body, and the water pump for extracting water in the cylinder body;Water outlet of water pump is transported to filter assembly by adjusting pipe assembly with water extracted from the cylinder body;By adjusting the water outlet of adjusting pipe assembly, the water outlet of adjusting pipe assembly is rotated or moved out from the water inlet of filter assembly, so that water extracted by water pump does not flow into filter assembly, and water changing of cylinder body is realized.The water outlet of the adjusting pipe assembly of the utility model and water pump is movably connected, that is, the adjusting pipe assembly can rotate and / or move relative to the water outlet of water pump;Adjusting pipe assembly can rotate relative to the water outlet of water pump Circumferentially, it can also be designed to move relative to the axis direction of the water outlet of water pump, and it can also be designed to rotate and move relative to the water outlet of water pump.

Description

Technical Field

[0001] This utility model relates to an external fish tank filter, and more particularly to an external fish tank filter with a water changing function. Background Technology

[0002] In aquariums, freshwater fish are typically kept with filters to filter and decompose fish waste, reducing the toxicity of ammonia and nitrogen in the water. Existing filters mainly include bottom filters, drip filters, and hang-on filters. Bottom filters and drip filters have long and complex piping, making installation and disassembly extremely inconvenient, as are cleaning and replacing filter media. Hang-on filters, on the other hand, are directly mounted on the aquarium wall and have a built-in pump, offering advantages such as easy and quick installation and disassembly, and convenient cleaning and replacement of filter media, both physical and biological. However, aquariums using hang-on filters require a separate pump to remove water during water changes, which is cumbersome and necessitates purchasing an additional pump, increasing the overall cost of aquarium keeping. Utility Model Content

[0003] The purpose of this invention is to solve the problems of existing external aquarium filters lacking water-changing functionality, requiring a separate water pump for water changes, and being functionally limited and cumbersome to operate. This invention provides a cleverly designed, multifunctional, and easy-to-use external aquarium filter with integrated water-changing capabilities. This external filter allows for water changes in the aquarium, making operation more convenient and eliminating the need for a separate water pump, thus reducing the risk of fish deaths.

[0004] The objective of this utility model can be achieved using the following technical solutions:

[0005] An external fish tank filter with water changing function, including

[0006] The housing is used for wall mounting on the cylinder body;

[0007] A filter assembly, located inside the housing, is used to filter the water inside the cylinder;

[0008] A water pump is used to draw water from the cylinder.

[0009] The water pump outlet delivers water drawn from the cylinder to the filter assembly via the regulating pipe assembly. By adjusting the outlet of the regulating pipe assembly, the outlet of the regulating pipe assembly is rotated or moved out of the inlet of the filter assembly, so that the water drawn by the water pump does not flow into the filter assembly, thus realizing the water replacement of the cylinder.

[0010] As a preferred embodiment, the inlet end of the regulating pipe assembly has an L-shaped structure. The inlet of the regulating pipe assembly is inserted into the outlet of the water pump. When the outlet of the regulating pipe assembly is adjusted to the inlet position of the filter assembly, the water pump draws water from the cylinder and delivers it to the filter assembly to achieve the purpose of circulation filtration. When the outlet of the regulating pipe assembly is rotated out of or moved out of the inlet position of the filter assembly, the water pump draws water out of the cylinder to achieve the purpose of water replacement.

[0011] As a preferred embodiment, the regulating pipe assembly is a U-shaped pipe, with the inlet of the U-shaped pipe inserted into the outlet of the water pump. When the outlet of the U-shaped pipe is adjusted to the inlet position of the filter assembly, the water pump draws water from the cylinder and delivers it to the filter assembly to achieve the purpose of circulation filtration. When the outlet of the U-shaped pipe is rotated out of or moved out of the inlet position of the filter assembly, the water pump draws water out of the cylinder to achieve the purpose of water replacement.

[0012] As a preferred embodiment, the regulating pipe assembly is an L-shaped pipe. The inlet of the L-shaped pipe is inserted into the outlet of the water pump. When the outlet of the L-shaped pipe is adjusted to the inlet position of the filter assembly, the water pump draws water from the cylinder and delivers it to the filter assembly to achieve the purpose of circulation filtration. When the outlet of the L-shaped pipe is rotated or moved out of the inlet position of the filter assembly, the water pump draws water out of the cylinder to achieve the purpose of water replacement.

[0013] As a preferred embodiment, a drain pipe is connected to the outlet of the regulating pipe assembly when the outlet of the regulating pipe assembly is rotated out of or moved out of the inlet position of the filter assembly.

[0014] As a preferred embodiment, the water pump outlet is provided with several first annular grooves or first annular protrusions, and correspondingly, the inlet of the regulating pipe assembly is provided with several first annular protrusions or first annular grooves. The first annular grooves and first annular protrusions are fitted together, and the regulating pipe assembly is inserted into the water pump outlet, so that the regulating pipe assembly and the water pump outlet are connected by an interference fit. Multiple first annular grooves or first annular protrusions are provided to form a multi-stage height and angle adjustment structure. The number of first annular grooves and first annular protrusions is one to multiple.

[0015] As a preferred embodiment, the U-shaped pipe includes a first L-shaped pipe and a second L-shaped pipe. The inlet of the second L-shaped pipe is connected to the outlet of the water pump through the first L-shaped pipe. The outer wall of the outlet of the first L-shaped pipe has several second annular grooves or second annular protrusions along its axial direction. Correspondingly, the inner wall of the inlet of the second L-shaped pipe has second annular protrusions or second annular grooves. The second annular grooves and second annular protrusions are fitted together to provide an interference fit between the first L-shaped pipe and the second L-shaped pipe. Multiple second annular grooves or second annular protrusions are provided to form a multi-stage length and angle adjustment structure. The number of second annular grooves and second annular protrusions is one to multiple.

[0016] As a preferred embodiment, the L-shaped pipe includes a first L-shaped pipe and a straight pipe. The inlet of the straight pipe is connected to the outlet of the water pump through the first L-shaped pipe. The outer wall of the outlet of the first L-shaped pipe has several second annular grooves or second annular protrusions along the axial direction. Correspondingly, the inner wall of the inlet of the straight pipe is provided with second annular protrusions or second annular grooves. The second annular grooves and second annular protrusions are fitted together to connect the first L-shaped pipe and the straight pipe with an interference fit. Multiple second annular grooves or second annular protrusions are provided to form a multi-stage length adjustment structure.

[0017] As a preferred embodiment, the water pump outlet is equipped with a flow regulating valve, which includes a valve body, a valve core located inside the valve body, and a knob located outside the valve body for controlling the rotation angle of the valve core. One end of the valve core has a thin plate structure, and when the valve core is rotated by the knob, the valve core causes the water flow to cycle from large to small to large to small.

[0018] As a preferred embodiment, the number of first annular grooves is multiple, and the number of first annular protrusions is one or more, with the number of first annular protrusions being less than the number of first annular grooves. Alternatively, the number of second annular grooves is multiple, and the number of second annular protrusions is one or more, with the number of second annular protrusions being less than the number of second annular grooves.

[0019] As a preferred solution, the valve core ensures that the water flow rate is not zero even when the water flow rate is at its minimum.

[0020] As a preferred option, the water pump inlet extends into the water body inside the cylinder through an inlet pipe.

[0021] As a preferred embodiment, the filtration assembly includes a pre-filter, a middle filter for deodorization, and a biochemical culture. The water flowing out of the regulating pipe assembly flows into the pre-filter, and after passing through the middle filter for deodorization, it flows into the biochemical culture.

[0022] The present invention has the following beneficial effects:

[0023] 1. When changing the water in the tank, simply pull the regulating pipe assembly upwards so that its outlet is away from the filter assembly's outlet. Then, use a basin to collect the water or a hose to connect to the regulating pipe assembly's outlet to complete the drainage function. Alternatively, the regulating pipe assembly can be rotated outside the housing, and then a basin or hose can be used to collect the water or connect to the regulating pipe assembly's outlet to complete the drainage purpose. Finally, the regulating pipe assembly can be pulled upwards first, then rotated away from the filter assembly's outlet, and then a basin or hose can be used to collect the water or connect to the regulating pipe assembly's outlet to drain the tank. The regulating pipe assembly in this structure is movably connected to the water pump's outlet, meaning it can rotate and / or move relative to the water pump's outlet. The regulating pipe assembly can rotate circumferentially relative to the water pump's outlet, or it can be designed to move axially relative to the water pump's outlet, or it can be designed to both rotate and move relative to the water pump's outlet.

[0024] 2. This utility model, by pulling the regulating pipe assembly upwards, causes the first annular protrusion to continuously disengage from one first annular groove and then re-enter the adjacent first annular groove, thus forming a multi-stage height adjustment structure for the regulating pipe assembly. Conversely, applying force to the regulating pipe assembly continuously lowers its height. After raising the height of the regulating pipe assembly so that its outlet is away from the inlet of the filter assembly, water can be collected in a basin or connected to the outlet of the regulating pipe assembly using a flexible hose to complete the drainage. The first annular groove and the first annular protrusion are tightly fitted, thereby achieving a limiting effect through the force between them, preventing the regulating pipe assembly from disengaging from the water pump outlet under the impact of water flow. Furthermore, the tight fit also provides a sealing effect to prevent leakage. Since the first annular protrusion and the first annular groove are fitted together in a circumferential manner, when a circumferential force is applied to the regulating pipe assembly, the first annular protrusion can rotate along the first annular groove, realizing the multi-angle adjustment structure of the regulating pipe assembly. It has the advantages of ingenious structural design and flexible adjustment, which greatly facilitates the switching between the two functions of water pumping and filtration and water pumping and discharge of the regulating pipe assembly.

[0025] 3. The first L-shaped tube is movably connected to the outlet of the water pump through the fit between the first annular protrusion and the first annular groove; while the second L-shaped tube is movably connected to the outlet of the first L-shaped tube through the fit between the first annular protrusion and the second annular groove. When the first L-shaped tube is pulled upwards and / or rotated, causing the outlet of the second L-shaped tube to leave the inlet of the filter assembly, the second annular protrusion can be continuously disengaged from one second annular groove and then engaged with another adjacent second annular groove by pulling the second L-shaped tube, thus increasing the overall length of the regulating tube assembly. This forms a multi-stage length adjustment structure for the regulating tube assembly, facilitating water collection in the basin or installation of a drain pipe onto the outlet of the second L-shaped tube. Conversely, applying force to the regulating tube assembly continuously shortens its length. The second annular groove and the second annular protrusion are tightly fitted, thereby achieving a limiting effect through the force between them, preventing the second L-shaped tube from disengaging from the outlet of the first L-shaped tube under the impact of water flow. The tight fit also provides a sealing effect, preventing leakage. Since the second annular protrusion and the second annular groove are fitted together in a circumferential manner, when a circumferential force is applied to the second L-shaped tube, the second annular protrusion can rotate along the second annular groove, forming a multi-angle adjustment structure for the second L-shaped tube.

[0026] 4. This utility model allows for drainage and water exchange by rotating the second L-shaped tube, causing its outlet to be rotated out of the filter assembly's inlet. Connecting the drain pipe to the outlet of the second L-shaped tube achieves this functionality. By designing the U-shaped regulating pipe assembly as two interconnected L-shaped tubes, the position of the outlet can be adjusted. This allows for switching between water filtration and drainage functions, as well as adjusting the length and outlet angle for convenient water discharge. The structure allows for switching between these two functions simply by rotating the second L-shaped tube and adjusting its outlet angle, demonstrating ingenious design and flexible adjustment.

[0027] 5. When one second annular protrusion corresponds to multiple second annular grooves, the structure has an adjustable length corresponding to the number of second annular grooves. When multiple second annular protrusions correspond to multiple second annular grooves, the structure simultaneously has multiple levels of tightly fitted second annular protrusions and second annular grooves, forming a multi-layered sealing structure. It is evident that the design of this structure is extremely ingenious. By inserting the regulating pipe assembly into the water pump outlet through the tightly fitted structure of the second annular protrusions and second annular grooves, it not only enables the movement and rotation of the second L-shaped pipe for convenient drainage operations and the switching between filtration and drainage functions, but also ensures reliable sealing and prevents leakage.

[0028] 6. This utility model can achieve the purpose of drainage and complete the water replacement by directly pushing the straight pipe to shorten the length of the regulating pipe assembly, so that the outlet of the straight pipe is away from the inlet of the filter assembly, and then connecting the drain pipe to the outlet of the straight pipe. By designing the L-shaped regulating pipe assembly as two mutually connected L-shaped pipes and a straight pipe, the position of the outlet of the regulating pipe assembly can be adjusted, realizing the switching between water pumping and filtration and water pumping and discharge functions, and also adjusting the length of the regulating pipe assembly and the position of the outlet for convenient drainage operation. This structure only requires moving the straight pipe so that the outlet of the straight pipe is away from the inlet of the filter assembly to realize the switching between the two functions of water pumping and filtration and water pumping and discharge, which has the advantages of ingenious structural design and flexible adjustment. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a schematic diagram of the structure of the external fish tank filter with water changing function of this utility model.

[0031] Figure 2 yes Figure 1 A structural diagram after the top cover has been removed.

[0032] Figure 3 This is a schematic diagram of the structure of the adjustment pipe assembly of the external fish tank filter with water changing function, which adopts an L-shaped pipe.

[0033] Figure 4 yes Figure 3 A schematic diagram of the structure where the outlet of the regulating pipe assembly is rotated out of the outer casing.

[0034] Figure 5 yes Figure 3 The L-shaped pipe is a structural diagram consisting of a first L-shaped pipe and a straight pipe.

[0035] Figure 6 yes Figure 5 A schematic diagram of the structure where the outlet of the regulating pipe assembly is rotated out of the outer casing.

[0036] Figure 7 This is a schematic diagram of the U-shaped tube structure of the adjustment tube assembly of the external fish tank filter with water changing function of this utility model.

[0037] Figure 8 yes Figure 7A schematic diagram of the structure where the outlet of the regulating pipe assembly is rotated out of the outer casing.

[0038] Figure 9 yes Figure 1 The rear view after the outlet of the regulating pipe assembly has been rotated out of the housing.

[0039] Figure 10 yes Figure 9 A cross-sectional view along the AA direction.

[0040] Figure 11 yes Figure 9 A cross-sectional view along the BB direction.

[0041] Figure 12 yes Figure 10 An enlarged view of part A.

[0042] Figure 13 yes Figure 11 An enlarged view of part B.

[0043] Figure 14 This is a schematic diagram of the flow regulating valve of the external fish tank filter with water changing function after the valve body has been removed. Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0045] Example 1

[0046] Reference Figures 1 to 8 This embodiment relates to an aquarium filter, including a housing 1 for wall mounting on the aquarium body, a filter assembly 2 disposed inside the housing 1 for filtering water in the aquarium body, and a water pump 4 for drawing water from the aquarium body; the outlet of the water pump 4 delivers water drawn from the aquarium body to the filter assembly 2 through an adjusting pipe assembly 3; by adjusting the outlet of the adjusting pipe assembly 3, the outlet of the adjusting pipe assembly 3 is rotated and / or moved out from the inlet of the filter assembly 2, so that the water drawn by the water pump 4 does not flow into the filter assembly 2, thereby realizing the water change of the aquarium body.

[0047] Under normal conditions, water pump 4 draws water from the cylinder and flows through regulating pipe assembly 3 into the inlet 201 of filter assembly 2, then flows back into the cylinder from the outlet 202 of filter assembly 2, thus achieving the purpose of circulating and filtering the water in the cylinder. When it is necessary to replace the water in the cylinder, simply pull regulating pipe assembly 3 upwards so that the outlet 301 of regulating pipe assembly 3 is away from the outlet 202 of filter assembly 2. Then, use a basin to collect the water or connect a hose to the outlet 301 of regulating pipe assembly 3 to complete the drainage function. Alternatively, regulating pipe assembly 3 can be rotated outside the housing 1, and then use a basin to collect the water or connect a hose to the outlet 301 of regulating pipe assembly 3 to complete the drainage purpose. Finally, regulating pipe assembly 3 can be pulled upwards first, then rotated away from the outlet 202 of filter assembly 2, and then use a basin to collect the water or connect a hose to the outlet 301 of regulating pipe assembly 3 to drain the cylinder. The regulating pipe assembly 3 of this structure is movably connected to the outlet of the water pump 4, that is, the regulating pipe assembly 3 can rotate and / or move relative to the outlet of the water pump 4; the regulating pipe assembly 3 can rotate circumferentially relative to the outlet of the water pump 4, or it can be designed to move in the axial direction relative to the outlet of the water pump 4, or it can be designed to both rotate and move relative to the outlet of the water pump 4.

[0048] The inlet end of the regulating pipe assembly 3 has an L-shaped structure. The inlet of the regulating pipe assembly 3 is inserted into the outlet 401 of the water pump 4. When the outlet 301 of the regulating pipe assembly 3 is adjusted to the inlet position of the filter assembly 2, the water pump 4 draws water from the tank and delivers it to the filter assembly 2, achieving the purpose of circulation filtration. When the outlet 301 of the regulating pipe assembly 3 is rotated out of or moved out of the inlet position of the filter assembly 2, the water pump 4 draws water out of the tank, achieving the purpose of water replacement. The L-shaped end of the regulating pipe assembly 3 is inserted into the outlet 401 of the water pump 4, and the two are movably connected. The regulating pipe assembly 3 can rotate and / or move relative to the outlet 401 of the water pump 4. The movable connection structure between the regulating pipe assembly 3 and the outlet 401 of the water pump 4 can adopt the following structure:

[0049] like Figures 3 to 8As shown, the outlet 401 of the water pump 4 is provided with several first annular grooves 41 or first annular protrusions 42. Correspondingly, the inlet of the regulating pipe assembly 3 is provided with several first annular protrusions 42 or first annular grooves 41. The first annular grooves 41 and the first annular protrusions 42 are fitted together, and the regulating pipe assembly 3 is inserted into the outlet 401 of the water pump 4, so that the regulating pipe assembly 3 and the outlet 401 of the water pump 4 are connected by an interference fit. There are multiple first annular grooves 41 or first annular protrusions 42, forming a multi-stage height and angle adjustment structure. When it is necessary to move the regulating pipe assembly 3, simply pull the regulating pipe assembly 3 upward, so that the first annular protrusions 42 continuously disengage from one first annular groove 41 and then snap into the adjacent previous first annular groove 41, thereby forming a multi-stage height adjustment structure of the regulating pipe assembly 3. Applying a force to the regulating pipe assembly 3 in the opposite direction will continuously lower the height of the regulating pipe assembly 3. After raising the height of the regulating pipe assembly 3 so that its outlet 301 is away from the inlet of the filter assembly 2, water can be collected in a basin or connected to the outlet 301 of the regulating pipe assembly 3 using a flexible hose to complete the drainage. The first annular groove 41 and the first annular protrusion 42 are tightly fitted together, thus achieving a limiting effect through the force between them, preventing the regulating pipe assembly 3 from dislodging from the outlet 401 of the water pump 4 under the impact of water flow. The tight fit also provides a sealing effect to prevent leakage. Because the first annular protrusion 42 and the first annular groove are circumferentially tightly fitted, when a circumferential force is applied to the regulating pipe assembly 3, the first annular protrusion 42 can rotate along the first annular groove 41, realizing a multi-angle adjustment structure for the regulating pipe assembly 3. This structure has the advantages of ingenious design and flexible adjustment, greatly facilitating the switching between the functions of water pumping and filtration and water pumping and discharge.

[0050] The number of first annular grooves 41 is set to multiple, and the number of first annular protrusions 42 can be one or more, with the number of first annular protrusions 42 being less than the number of first annular grooves 41. When one first annular protrusion 42 corresponds to multiple second annular grooves 41, the structure has an adjustable height that is proportional to the number of first annular grooves 41. When multiple first annular protrusions 42 correspond to multiple first annular grooves 41, the structure simultaneously has multiple levels of tightly fitted first annular protrusions 42 and first annular grooves 41, forming a multi-layered sealing structure. It can be seen that the design of this structure is extremely ingenious. By inserting the regulating pipe assembly 3 into the outlet 401 of the water pump 4 through the tightly fitted structure of the first annular protrusions 42 and first annular grooves 41, the movement and rotation of the regulating pipe assembly 3 can be realized, achieving the functions of filtration and drainage, while ensuring the reliability of the seal and preventing water leakage.

[0051] like Figure 7 and Figure 8As shown, the regulating pipe assembly 3 is a U-shaped pipe. The inlet of the U-shaped pipe is inserted into the outlet 401 of the water pump 4. When the outlet of the U-shaped pipe is adjusted to the inlet position of the filter assembly 2, the water pump 4 draws water from the cylinder and delivers it to the filter assembly 2 to achieve the purpose of circulation filtration. When the outlet of the U-shaped pipe is rotated out of or moved out of the inlet position of the filter assembly 2, the water pump 4 draws water out of the cylinder to achieve the purpose of water replacement.

[0052] When the outlet 301 of the regulating pipe assembly 3 is rotated out of or moved out of the inlet position of the filter assembly 2, a drain pipe is connected to the outlet 301 of the regulating pipe assembly 3. This invention allows for two drainage methods for water replacement: 1. After rotating and / or moving the outlet 301 of the regulating pipe assembly 3 out of and / or moving it out of the inlet position of the filter assembly 2, water flowing from the outlet 301 of the regulating pipe assembly 3 can be collected in a basin to achieve water replacement; 2. A drain pipe is connected to the outlet 301 of the regulating pipe assembly 3 to directly discharge water into the toilet, eliminating the hassle of carrying a basin and emptying the water.

[0053] like Figures 7 to 13As shown, the U-shaped pipe includes a first L-shaped pipe 31 and a second L-shaped pipe 32. The inlet of the second L-shaped pipe 32 is connected to the outlet 401 of the water pump 4 through the first L-shaped pipe 31. The outer wall of the outlet of the first L-shaped pipe 31 has several second annular grooves 33 or second annular protrusions 34 along the axial direction. Correspondingly, the inner wall of the inlet of the second L-shaped pipe 32 has second annular protrusions 34 or second annular grooves 33. The second annular grooves 33 and second annular protrusions 34 are fitted together to connect the first L-shaped pipe 31 and the second L-shaped pipe 32 with an interference fit. Multiple second annular grooves 33 or second annular protrusions 34 are provided to form a multi-stage length and angle adjustment structure. The first L-shaped pipe 31 is movably connected to the outlet 401 of the water pump 4 through the fit between the first annular protrusion 42 and the first annular groove 41; while the second L-shaped pipe 32 is movably connected to the outlet of the first L-shaped pipe 31 through the fit between the first annular protrusion 42 and the second annular groove 33. After pulling up and / or rotating the first L-shaped tube 31 so that the outlet of the second L-shaped tube 32 leaves the inlet of the filter assembly 2, the second annular protrusion 34 can be continuously dislodged from one second annular groove 33 and then inserted into another adjacent second annular groove 33 by pulling the second L-shaped tube 32, thereby increasing the overall length of the regulating tube assembly 3. This forms a multi-stage length adjustment structure for the regulating tube assembly 3, facilitating water collection in the basin or installation of the drain pipe onto the outlet of the second L-shaped tube 32 (i.e., the outlet 301 of the regulating tube assembly). Conversely, applying force to the regulating tube assembly 3 continuously shortens its length. The second annular groove 33 and the second annular protrusion 34 are tightly fitted, thereby achieving a limiting effect through the force between them, preventing the second L-shaped tube 32 from dislodging from the outlet of the first L-shaped tube 31 under the impact of water flow. The tight fit also has a sealing effect, preventing leakage. Because the second annular protrusion 34 and the second annular groove 33 are circumferentially fitted, when a circumferential force is applied to the second L-shaped tube 32, the second annular protrusion 34 can rotate along the second annular groove 33, forming a multi-angle adjustment structure for the second L-shaped tube 32. When water needs to be changed, the outlet of the second L-shaped tube 32 can be rotated out of the inlet of the filter assembly 2, and then the drain pipe can be connected to the outlet of the second L-shaped tube 32 to achieve the purpose of drainage and complete the water change function.By designing the U-shaped regulating pipe assembly 3 as two L-shaped pipes that are movably connected to each other, the position of the outlet 301 of the regulating pipe assembly 3 can be adjusted. This allows for switching between the functions of water pumping and filtration and water pumping and discharge. It also allows for adjusting the length of the regulating pipe assembly 3 and the angle of the outlet to facilitate water discharge. This structure only requires rotating the second L-shaped pipe 32 to adjust the rotation angle of the outlet of the second L-shaped pipe 32 (i.e., the outlet 301 of the regulating pipe assembly), thereby enabling the switching between the two functions of water pumping and filtration and water pumping and discharge. It has the advantages of ingenious structural design and flexible adjustment.

[0054] The number of second annular grooves 33 is set to multiple, and the number of second annular protrusions 34 can be one or more, with the number of second annular protrusions 34 being less than the number of second annular grooves 33. When one second annular protrusion 34 corresponds to multiple second annular grooves 33, the structure has an adjustable length corresponding to the number of second annular grooves 33. When multiple second annular protrusions 34 correspond to multiple second annular grooves 33, the structure simultaneously has multiple levels of tightly fitted second annular protrusions 34 and second annular grooves 33, forming a multi-layered sealing structure. It can be seen that the design of this structure is extremely ingenious. By inserting the regulating pipe assembly 3 into the outlet 401 of the water pump 4 through the tightly fitted structure of the second annular protrusions 34 and second annular grooves 33, it is possible to move and rotate the second L-shaped pipe 32 for convenient drainage operations and to switch between filtration and drainage functions, while ensuring the reliability of the seal and preventing water leakage.

[0055] like Figure 1 and Figure 14 As shown, a flow regulating valve 5 is provided on the outlet 401 of the water pump 4. The flow regulating valve 5 includes a valve body 51, a valve core 52 located inside the valve body 51, and a knob 53 located outside the valve body 51 for controlling the rotation angle of the valve core 52. One end of the valve core 52 has a thin plate structure. When the valve core 52 is rotated by the knob 53, the valve core 52 causes the water flow rate to cycle from large to small to large to small. When the valve core 52 sets the water flow rate to the minimum value, the water flow rate is not zero, which can prevent the water pumped by the water pump 4 from being unable to flow and causing overload, thus preventing damage to the water pump 4. The inlet of the water pump 4 extends into the water body in the cylinder through the inlet pipe 6. A filter head 7 is installed at the lower end of the inlet pipe 6.

[0056] like Figure 2 and Figure 3As shown, the filter assembly 2 includes a pre-filter 21, a middle filter for deodorization 22, and a biochemical culture 23. Water flowing out of the regulating pipe assembly 3 flows into the pre-filter 21, passes through the middle filter for deodorization 22, and then flows into the biochemical culture 23. The pre-filter 21 includes a housing 211 and filter cotton disposed within the housing. The inlet of the housing 211 is located at the upper end of the housing 211, and the housing 211 is detachably installed within the first accommodating space 11 of the housing 1. The outlet 301 of the regulating pipe assembly 3 is located above the inlet of the housing 211, and the outlet 301 of the regulating pipe assembly 3 is directly above the inlet of the housing 211. The middle filtration and deodorization unit 22 includes activated carbon, which is disposed in the second accommodating space 12 within the housing 1. The inlet of the second accommodating space 12 is connected to the outlet of the box 211, and the outlet of the second accommodating space 12 is connected to the inlet of the biochemical culture unit 23. The biochemical culture unit 23 includes a second box 231 and biochemical materials disposed within the second box 231. The second box 231 is detachably installed in the third accommodating space 13 of the housing 1.

[0057] Example 2

[0058] This embodiment is an improvement on the regulating tube assembly 3 based on embodiment 1, such as... Figures 3 to 6 As shown, the regulating pipe assembly 3 includes an L-shaped pipe. The inlet of the L-shaped pipe is inserted into the outlet 401 of the water pump 4. When the outlet of the L-shaped pipe is adjusted to the inlet position of the filter assembly 2, the water pump 4 draws water from the cylinder and delivers it to the filter assembly 2 to achieve the purpose of circulation filtration. When the outlet of the L-shaped pipe is rotated and / or moved out of the inlet position of the filter assembly 2, the water pump 4 draws water out of the cylinder to achieve the purpose of water replacement.

[0059] This invention allows for two drainage methods for water exchange: 1. After rotating and / or moving the outlet 301 of the regulating pipe assembly 3 out of the inlet position of the filter assembly 2, water flowing from the outlet 301 of the regulating pipe assembly 3 can be collected in a basin to achieve water exchange; 2. A drain pipe is connected to the outlet 301 of the regulating pipe assembly 3 to directly discharge water into the toilet, eliminating the hassle of carrying a basin and emptying the water. Figure 3 As shown, by pulling the L-shaped pipe upwards, the outlet 301 of the regulating pipe assembly 3 is moved to a position sufficient for a basin to collect water or for installing a drain pipe, thus achieving drainage. Alternatively, it can be done as follows: Figure 4As shown, directly rotate the regulating pipe assembly 3 so that the outlet 301 of the regulating pipe assembly 3 is rotated out of the housing. Afterwards, water can be collected in a basin or drained by installing a drain pipe. Alternatively, the L-shaped pipe can be pulled upwards to move the outlet 301 of the regulating pipe assembly 3 away from the inlet of the filter assembly 2, and then the regulating pipe assembly 3 can be rotated so that the outlet 301 is rotated out of the housing. Afterwards, water can be collected in a basin or drained by installing a drain pipe.

[0060] like Figure 5 , Figure 6 and Figure 13 As shown, the L-shaped pipe includes a first L-shaped pipe 31 and a straight pipe 35. The inlet of the straight pipe 35 is connected to the outlet 401 of the water pump 4 through the first L-shaped pipe 31. The outer wall of the outlet of the first L-shaped pipe 31 has several second annular grooves 33 or second annular protrusions 34 along the axial direction. Correspondingly, the inner wall of the inlet of the straight pipe 35 is provided with second annular protrusions 34 or second annular grooves 33. The second annular grooves 33 and second annular protrusions 34 are fitted together to connect the first L-shaped pipe 31 and the straight pipe with an interference fit. There are multiple second annular grooves 33 or second annular protrusions 34 to form a multi-stage length adjustment structure.

[0061] like Figure 5 , Figure 6 , Figure 12 and Figure 13As shown, the first L-shaped pipe 31 is movably connected to the outlet 401 of the water pump 4 through the fit between the first annular protrusion 42 and the first annular groove 41; while the straight pipe 35 is movably connected to the outlet of the first L-shaped pipe 31 through the fit between the second annular protrusion 34 and the second annular groove 33. After the first L-shaped pipe 31 is pulled up and / or rotated so that the outlet of the straight pipe 35 (i.e., the outlet 301 of the regulating pipe assembly) leaves the inlet of the filter assembly 2, the second annular protrusion 34 can be continuously dislodged from one second annular groove 33 and then inserted into another adjacent second annular groove 33 by pulling the straight pipe 35, thereby increasing the overall length of the regulating pipe assembly 3, forming a multi-stage length adjustment structure for the regulating pipe assembly 3. This facilitates water collection in the basin or the installation of a drain pipe onto the outlet of the straight pipe 35 (i.e., the outlet 301 of the regulating pipe assembly); conversely, by applying force to the straight pipe 35, the length of the regulating pipe assembly 3 is continuously shortened. The second annular groove 33 and the second annular protrusion 34 are tightly fitted together, thereby achieving a limiting effect through the force between the two, preventing the straight pipe from coming off the outlet of the L-shaped pipe under the impact of water flow. The tight fit also has a sealing effect to prevent water leakage. When water needs to be changed, the straight pipe 35 can be directly pushed to shorten the length of the regulating pipe assembly 3, so that the outlet of the straight pipe 35 is away from the inlet of the filter assembly 2. Then, the drain pipe is connected to the outlet of the straight pipe 35 to achieve the purpose of drainage and complete the water change. By designing the L-shaped regulating pipe assembly 3 as consisting of two mutually connected L-shaped pipes and a straight pipe 35, the position of the outlet 301 of the regulating pipe assembly 3 can be adjusted. This allows for switching between the functions of water pumping and filtration and water pumping and discharge, and also allows for adjustment of the length of the regulating pipe assembly 3 and the position of the outlet to facilitate drainage operations. This structure only requires moving the straight pipe so that the outlet of the straight pipe 35 is away from the inlet of the filter assembly 2 to switch the regulating pipe assembly 3 between the two functions of water pumping and filtration and water pumping and discharge. It has the advantages of ingenious structural design and flexible adjustment.

[0062] The above-disclosed embodiment is merely a preferred embodiment of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.

Claims

1. An external fish tank filter with water changing function, characterized in that, include The housing is used for wall mounting on the cylinder body; A filter assembly, located inside the housing, is used to filter the water inside the cylinder; A water pump is used to draw water from the cylinder. The water pump outlet delivers water drawn from the cylinder to the filter assembly via the regulating pipe assembly; by adjusting the outlet of the regulating pipe assembly, the outlet of the regulating pipe assembly is rotated and / or moved out of the inlet of the filter assembly, so that the water drawn by the water pump does not flow into the filter assembly, thus realizing the water replacement of the cylinder.

2. The external fish tank filter with water changing function according to claim 1, characterized in that, The inlet of the regulating pipe assembly has an L-shaped structure. The inlet of the regulating pipe assembly is inserted into the outlet of the water pump. When the outlet of the regulating pipe assembly is adjusted to the inlet position of the filter assembly, the water pump draws water from the cylinder and delivers it to the filter assembly to achieve the purpose of circulation filtration. When the outlet of the regulating pipe assembly is rotated out and / or moved out of the inlet position of the filter assembly, the water pump draws water out of the cylinder to achieve the purpose of water replacement.

3. The external fish tank filter with water changing function according to claim 1, characterized in that, The regulating pipe assembly is a U-shaped pipe. The inlet of the U-shaped pipe is inserted into the outlet of the water pump. When the outlet of the U-shaped pipe is adjusted to the inlet position of the filter assembly, the water pump draws water from the cylinder and delivers it to the filter assembly to achieve the purpose of circulation filtration. When the outlet of the U-shaped pipe is rotated out and / or moved out of the inlet position of the filter assembly, the water pump draws water out of the cylinder to achieve the purpose of water replacement.

4. The external fish tank filter with water changing function according to claim 1, characterized in that, The regulating pipe assembly is an L-shaped pipe. The inlet of the L-shaped pipe is inserted into the outlet of the water pump. When the outlet of the L-shaped pipe is adjusted to the inlet position of the filter assembly, the water pump draws water from the cylinder and delivers it to the filter assembly to achieve the purpose of circulation filtration. When the outlet of the L-shaped pipe is rotated or moved out of the inlet position of the filter assembly, the water pump draws water out of the cylinder to achieve the purpose of water replacement.

5. An external fish tank filter with water changing function according to claim 1, characterized in that, When the outlet of the regulating pipe assembly is rotated out of and / or moved out of the inlet position of the filter assembly, a drain pipe is connected at the outlet of the regulating pipe assembly.

6. An external fish tank filter with water changing function according to claim 1, characterized in that, The water pump outlet is provided with several first annular grooves or first annular protrusions. Correspondingly, the water inlet of the regulating pipe assembly is provided with several first annular protrusions or first annular grooves. The first annular grooves and first annular protrusions are sleeved together, and the regulating pipe assembly is inserted into the water pump outlet, so that the regulating pipe assembly and the water pump outlet are connected by an interference fit. There are multiple first annular grooves or first annular protrusions to form a multi-stage height and angle adjustment structure.

7. An external fish tank filter with water changing function according to claim 1, characterized in that, The U-shaped pipe includes a first L-shaped pipe and a second L-shaped pipe. The inlet of the second L-shaped pipe is connected to the outlet of the water pump through the first L-shaped pipe. The outer wall of the outlet of the first L-shaped pipe has several second annular grooves or second annular protrusions along the axial direction. Correspondingly, the inner wall of the inlet of the second L-shaped pipe is provided with second annular protrusions or second annular grooves. The second annular grooves and second annular protrusions are fitted together to connect the first L-shaped pipe and the second L-shaped pipe with an interference fit. There are multiple second annular grooves or second annular protrusions to form a multi-stage length and angle adjustment structure. The number of second annular grooves and second annular protrusions is one to multiple.

8. An external fish tank filter with water changing function according to claim 1, characterized in that, The L-shaped pipe includes a first L-shaped pipe and a straight pipe. The inlet of the straight pipe is connected to the outlet of the water pump through the first L-shaped pipe. The outer wall of the outlet of the first L-shaped pipe has several second annular grooves or second annular protrusions along the axial direction. Correspondingly, the inner wall of the inlet of the straight pipe is provided with second annular protrusions or second annular grooves. The second annular grooves and second annular protrusions are fitted together to connect the first L-shaped pipe and the straight pipe with an interference fit, forming a multi-stage length adjustment structure.

9. An external fish tank filter with water changing function according to claim 1, characterized in that, The water pump outlet is equipped with a flow regulating valve, which includes a valve body, a valve core inside the valve body, and a knob outside the valve body for controlling the rotation angle of the valve core. One end of the valve core is a thin plate structure. When the valve core is rotated by the knob, the valve core causes the water flow to cycle from large to small to large to small.

10. An external fish tank filter with water changing function according to claim 1, characterized in that, The number of first annular grooves is set to multiple, and the number of first annular protrusions is set to one or more, with the number of first annular protrusions being less than the number of first annular grooves; or the number of second annular grooves is set to multiple, and the number of second annular protrusions is set to one or more, with the number of second annular protrusions being less than the number of second annular grooves.

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