An external fish tank filter with waterfall flow and slow flow switching function

Abstract

The utility model discloses a kind of external hanging fish tank filters with waterfall flow and slow flow switching function, including the shell for hanging on the cylinder body, the filter assembly for being located in shell and being used to filter the water in the cylinder body, and the water pump for extracting the water in the cylinder body;Water flow in the cylinder body is extracted by water pump and passes through filter assembly, and the water passing through filter assembly flows into the cylinder body from the water outlet of shell;Water outlet of the shell is equipped with water flow regulating device, and water flow regulating device adjusts the flow rate and / or angle of water flowing into the cylinder body, so that water flow forms waterfall flow and / or slow flow.The utility model only needs to use an external hanging filter, which can be applied to the whole process of opening cylinder (cultivating aquatic plants and raising water at the same time) and fish raising of grass cylinder, and cannot purchase another filter suitable for cultivating aquatic plants or raising fish separately, which reduces the investment of hardware cost, and there is no need to replace different filters at different stages.

Description

Technical Field

[0001] This utility model relates to an external aquarium filter, and more particularly to an external aquarium filter with a waterfall flow and slow flow switching function. Background Technology

[0002] In aquarium design, when creating a planted aquarium for freshwater fish, it's essential to plant aquatic plants before setting up the new tank. To save time, a water conditioning process is also necessary. This conditioning requires running an external filter to circulate the water, ensuring a constant flow of aquarium water through the filter components. During the plant cultivation phase, the water flow from the filter outlet should be gentle; otherwise, it will significantly impact the plant substrate, washing seeds to the surface and severely affecting germination rates. Once the plants are established and the water has been conditioned, ornamental fish are introduced. At this point, to increase oxygen levels, a high-velocity, waterfall-like flow from the filter outlet is typically needed to create significant agitation and oxygenation. However, the outlets of existing external filters can only achieve a gentle or waterfall-like water flow, which is not suitable for the entire process of setting up a planted aquarium (simultaneously cultivating aquatic plants and conditioning the water) and keeping fish, causing great inconvenience to both. Summary of the Invention

[0003] The purpose of this invention is to solve the problem that the outlet of existing external aquarium filters cannot switch between waterfall flow and slow flow, which makes the filters unsuitable for the entire process of setting up a planted aquarium (simultaneously cultivating aquatic plants and conditioning the water) and raising fish. This invention provides an external aquarium filter with a cleverly designed structure, diverse functions, and easy-to-use features that can switch between waterfall flow and slow flow.

[0004] The objective of this utility model can be achieved using the following technical solutions: An external aquarium filter with waterfall and slow flow switching functions, including The housing is used for wall mounting on the cylinder body; The filter assembly is located inside the housing and is used to filter the water pairs inside the cylinder. A water pump is used to draw water from the cylinder. The water pump draws water from the cylinder and flows it through the filter assembly. The water flowing through the filter assembly flows into the cylinder from the outlet of the housing. The outlet of the housing is equipped with a water flow regulating device, which adjusts the flow rate and / or angle of the water flowing into the cylinder to form a waterfall flow and / or a slow flow.

[0005] As a preferred embodiment, the water flow regulating device has two outlets with different exit angles; the angle between the water flowing into the cylinder through the first outlet and the water surface is smaller than the angle between the water flowing into the cylinder through the second outlet and the water surface; the water flow regulating device controls the water flowing into the cylinder to flow out from the first outlet, forming a slow flow; the water flow regulating device controls the water flowing into the cylinder to flow out from the second outlet, forming a waterfall flow.

[0006] As a preferred embodiment, the water flow regulating device has two water outlets at different heights; the water flow regulating device controls the water flowing from the filter assembly to flow out from the first water outlet, forming a slow flow; the water flow regulating device controls the water flowing from the filter assembly to flow out from the second water outlet, forming a waterfall flow; the height of the second water outlet is higher than the height of the first water outlet.

[0007] Furthermore, when the water flow regulating device opens the first outlet, water flows into the cylinder from the first outlet, forming a slow flow; when the water flow regulating device closes or reduces the size of the first outlet, water flows into the cylinder from the second outlet, forming a waterfall flow.

[0008] As a preferred embodiment, the water flow regulating device includes a water guide channel installed on the outlet of the housing, and a movable cover plate disposed on the water guide channel; the inlet of the water guide channel is connected to the outlet of the filter assembly, and a first outlet is opened in the water guide channel; the movable cover plate can open or close the first outlet; when the movable cover plate opens the first outlet, water flows into the cylinder from the first outlet; when the movable cover plate closes or reduces the size of the first outlet, water flows into the cylinder from the second outlet of the water guide channel; the second outlet of the water guide channel is higher than the height of the first outlet; or the angle from the first outlet into the cylinder is less than the angle from the second outlet into the cylinder.

[0009] As a preferred embodiment, the inner bottom surface of the water guide channel and the bottom surface of the movable cover are both arc-shaped surfaces, and the two ends of the movable cover are hinged to the housing; when the movable cover is swung to the first water outlet position, the movable cover gradually closes the first water outlet; when the movable cover swings away from the first water outlet position, the movable cover gradually opens the first water outlet.

[0010] As a preferred embodiment, the water flow regulating device includes a water guide channel installed on the outlet of the housing, and a first movable cover and a second movable cover provided on the water guide channel; the inlet of the water guide channel is connected to the outlet of the filter assembly, and a first outlet is opened in the water guide channel; the first movable cover can open or close the first outlet; the second movable cover is used to adjust the water flow height of the second outlet of the water guide channel; when the first movable cover is closed or the first outlet is reduced, the water flow height and angle flowing into the cylinder are adjusted by adjusting the position of the second movable cover at the second outlet of the water guide channel.

[0011] As a preferred embodiment, the water guide channel, the first movable cover plate, and the second movable cover plate are all arc-shaped, and both ends of the first and second movable cover plates are hinged to the housing. When the first movable cover plate is swung to the first outlet position, the first movable cover plate gradually closes the first outlet. When the first movable cover plate swings away from the first outlet position, the first movable cover plate gradually opens the first outlet. When the second movable cover plate swings to the second outlet extending out of the water guide channel, the water flow height into the cylinder is increased.

[0012] As a preferred embodiment, the end of the second movable cover away from the first outlet is provided with a baffle with multiple diversion channels; when the water flows through the baffle, the water flow is diverted into multiple branches.

[0013] 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.

[0014] As a preferred embodiment, the movable cover is provided with locking blocks or slots on both sides, and correspondingly, the housing is provided with locking slots or locking blocks; the multi-stage swing adjustment structure of the movable cover is formed by the locking of the locking blocks and the slots.

[0015] As a preferred embodiment, the first movable cover plate is provided with first locking blocks or first locking slots on both sides, and correspondingly, the housing is provided with first locking slots or first locking blocks; a multi-stage swing adjustment structure for the first movable cover plate is formed by the locking between the first locking blocks and the first locking slots; the second movable cover plate is provided with second locking blocks or second locking slots on both sides, and correspondingly, the housing is provided with second locking slots or second locking blocks; a multi-stage swing adjustment structure for the second movable cover plate is formed by the locking between the second locking blocks and the second locking slots.

[0016] The present invention has the following beneficial effects: 1. This utility model uses a water flow regulating device at the outlet of the shell to control the flow rate or angle of water entering the tank, ensuring that the water flowing back into the tank after passing through the filtration components adapts to the tank's environmental conditions. For example, when a planted aquarium is newly set up and in the aquatic plant cultivation stage, adjusting the water flow regulating device slows down the flow rate and / or decreases the angle to create a gentle flow, reducing the impact of the water flow on the sediment and seeds in the aquarium, improving the germination and survival rates of the aquatic plants. Simultaneously, the water pump's circulation filtration helps to condition the water in the tank. After the aquatic plants are cultivated and fish are introduced, adjusting the water flow regulating device speeds up the flow rate and / or increases the angle to create a waterfall flow, increasing the disturbance of the water in the tank, improving water flow and oxygen content, thereby increasing the fish's survival rate and reducing the risk of fish dying from oxygen deficiency. This invention requires only one external filter to be used for the entire process of setting up a planted aquarium (simultaneously cultivating aquatic plants and conditioning the water) and raising fish. It eliminates the need to purchase a separate filter for cultivating aquatic plants or raising fish, thus reducing hardware costs. It also eliminates the need to replace different filters at different stages, making it ingeniously designed and easy to use.

[0017] 2. This utility model's water flow regulating device employs two outlets with different projection angles. By opening the first outlet, water flows into the tank. Because the angle between the projection direction of the first outlet and the water surface is small, the impact and disturbance of the water flow on the tank are minimal, creating a gentle flow that ensures the water returning to the tank will not damage the aquatic plant substrate and seeds during the cultivation stage. When the first outlet is closed or reduced in size, all or part of the water flows out from the second outlet. Because the angle between the projection direction of the second outlet and the water surface is larger, the impact and disturbance of the water flow on the tank are greater, creating a waterfall-like flow. This increases the disturbance of the water in the tank, improving water flow and oxygen content, thereby increasing the fish survival rate and reducing fish deaths due to oxygen deficiency. This device is suitable for the fish rearing stage after aquatic plant cultivation is complete.

[0018] 3. This utility model's water flow regulating device employs two outlets positioned at different heights. By opening the first outlet, water flows into the tank. Due to the lower height of the first outlet, the water flow into the tank is slower, creating a gentle flow that prevents water returning to the tank from damaging the aquatic plant substrate and seeds during the cultivation stage. When the first outlet is closed or reduced in size, all or part of the water flows out from the second outlet. Because the second outlet is higher, the water flow has a greater impact and disturbance on the tank water, creating a waterfall-like flow. This increased disturbance enhances water flow and oxygen levels, thereby improving fish survival rates and reducing fish mortality due to oxygen deprivation. It is suitable for the fish rearing stage after aquatic plant cultivation is complete.

[0019] 4. In this invention, during the water flow within the water guide channel, the water first flows through the first outlet. When the first outlet is open, the water flows into the tank from the first outlet, forming a slow flow. When the movable cover is controlled to close the first outlet, some water flows to the second outlet, forming a dual water flow structure of slow flow and waterfall flow. When the movable cover is completely closed, all water flows to the second outlet and into the tank, forming a waterfall flow. Therefore, the movement pattern and path of the water flow can be controlled simply by operating the movable cover, making the water flow suitable for different stages of setting up a planted aquarium. It is simple, convenient, and quick to use.

[0020] 5. This utility model ingeniously sets the inner bottom surface of the water guide channel and the bottom surface of the movable cover plate as matching arc surfaces, so that the movable cover plate can move in an arc along the inner bottom surface of the water guide channel, and ensure that the bottom surface of the movable cover plate can fit against the inner bottom surface of the water guide channel. Therefore, the function of switching between waterfall flow and slow flow can be realized by pushing and pulling the movable cover plate with one hand.

[0021] 6. This utility model can control the opening, closing, or reducing of the first water outlet through the first movable cover plate, thereby controlling the opening, closing, and flow rate of the slow flow. At the same time, it can control the height of the second water outlet through the second movable cover plate, thereby controlling the flow rate and angle of the waterfall. Therefore, by controlling the swing position of the first and second movable cover plates, the movement state of the water flow at the first and second water outlets can be controlled. This makes it suitable for all stages of a planted aquarium, from newly opened breeding tanks to water conditioning and fish raising, and has the advantages of high versatility, ease of use, and diverse functions. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a schematic diagram of the structure of an external aquarium filter with waterfall flow and slow flow switching function in Embodiment 1 of this utility model when the movable cover is in the closed first outlet state.

[0024] Figure 2 yes Figure 1 Side view.

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure when the movable cover is in the open first outlet state.

[0026] Figure 4 yes Figure 3 A structural diagram showing the structure when the movable cover is removed.

[0027] Figure 5 This is a schematic diagram of the structure of an external aquarium filter with waterfall flow and slow flow switching function in Embodiment 2 of this utility model, with the first movable cover plate closing the first water outlet and the second movable cover plate in the initial position.

[0028] Figure 6 yes Figure 5 A structural diagram showing the first and second movable cover plates after they have been removed.

[0029] Figure 7 yes Figure 5 A schematic diagram of the structure when the second movable cover is adjusted to extend out of the second outlet.

[0030] Figure 8 yes Figure 7 Top view.

[0031] Figure 9 This utility model relates to a flow regulating valve for an external aquarium filter with waterfall and slow flow switching functions, after the valve body has been removed. Detailed Implementation

[0032] 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. Example

[0033] Reference Figure 1 and Figure 4 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 the water in the aquarium body, and a water pump for drawing water from the aquarium body; the water pump draws water from the aquarium body and flows through the filter assembly 2, and the water flowing through the filter assembly 2 flows into the aquarium body from the outlet of the housing 1; the outlet of the housing 1 is provided with a water flow regulating device 3, which regulates the flow rate and / or angle of the water flowing into the aquarium body, so that the water flow forms a waterfall flow and / or a slow flow.

[0034] This structure uses a water flow regulating device 3 at the outlet of the shell 1 to control the flow rate and / or angle of water flowing into the tank, ensuring that the water flowing back into the tank after passing through the filter assembly 2 adapts to the tank's environmental conditions. For example, when a planted tank is newly set up and in the aquatic plant cultivation stage, adjusting the water flow regulating device 3 slows down the flow rate and / or decreases the angle to create a gentle flow, reducing the impact of the water flow on the sediment and seeds in the tank, improving the germination and survival rates of the aquatic plants. Simultaneously, the water pump's circulation filtration system conditioned the water in the tank. After the aquatic plants are cultivated and fish are introduced, adjusting the water flow regulating device 3 speeds up the flow rate and / or increases the angle to create a waterfall effect, increasing the water's movement and oxygen content, thereby improving the fish's survival rate and reducing the risk of fish dying from oxygen deprivation. This invention requires only one external filter to be used for the entire process of setting up a planted aquarium (simultaneously cultivating aquatic plants and conditioning the water) and raising fish. It eliminates the need to purchase a separate filter for cultivating aquatic plants or raising fish, thus reducing hardware costs. It also eliminates the need to replace different filters at different stages, making it ingeniously designed and easy to use.

[0035] As one type of water flow regulation structure, the water flow regulation device 3 of this structure is provided with two water outlets (31, 32), and the two water outlets have different exit angles; the angle between the water flowing into the cylinder through the first water outlet 31 and the water surface is smaller than the angle between the water flowing into the cylinder through the second water outlet 32 ​​and the water surface; the water flow regulation device 3 controls the water flowing into the cylinder to flow out from the first water outlet 31, forming a slow flow; the water flow regulation device 3 controls the water flowing into the cylinder to flow out from the second water outlet 32, forming a waterfall flow.

[0036] The water flow regulating device 3 in this structure employs two outlets with different projection angles. Opening the first outlet 31 allows water to flow into the tank. Because the angle between the projection direction of the first outlet 31 and the water surface is small, the impact and disturbance of the water flow on the tank is minimal, creating a gentle flow that prevents damage to the aquatic plant substrate and seeds during the cultivation stage. When the first outlet 31 is closed or reduced in size, all or part of the water flows out from the second outlet 32. Because the angle between the projection direction of the second outlet 32 ​​and the water surface is larger, the impact and disturbance of the water flow on the tank is greater, creating a waterfall-like flow. This increases the disturbance to the tank water, improving water flow and oxygen levels, thereby increasing fish survival rates and reducing fish mortality due to oxygen deprivation. This method is suitable for fish rearing after aquatic plant cultivation is complete.

[0037] Another type of water flow regulation structure can be adopted, in which the water flow regulation device 3 is provided with two water outlets at different heights; the water flow regulation device 3 controls the water flowing out of the filter component 2 to flow out from the first water outlet 31, forming a slow flow; the water flow regulation device 3 controls the water flowing out of the filter component 2 to flow out from the second water outlet 32, forming a waterfall flow; the height of the second water outlet 32 ​​is higher than the height of the first water outlet 31.

[0038] The water flow regulating device 3 in this structure employs two outlets at different heights. By opening the first outlet 31, water flows into the tank from it. Due to the lower height of the first outlet 31, the water flow into the tank is slower, creating a gentle flow that prevents water returning to the tank from damaging the aquatic plant substrate and seeds during the cultivation stage. When the first outlet 31 is closed or reduced in size, all or part of the water flows out from the second outlet 32. Because the second outlet 32 ​​is higher, the water flow has a greater impact and disturbance on the tank water, creating a waterfall-like flow. This increases the disturbance to the tank water, improving water flow and oxygen content, thereby increasing fish survival rates and reducing fish deaths due to oxygen deficiency. This method is suitable for fish rearing after the aquatic plants have been cultivated.

[0039] When the water flow regulating device 3 opens the first outlet 31, water flows into the tank from the first outlet 31, forming a slow flow. At this time, all the water flows into the tank from the first outlet 31. When the water flow regulating device 3 closes the first outlet 31, all the water flows into the tank from the second outlet 32, forming a waterfall flow. When the water flow regulating device 3 reduces the opening of the first outlet 31, part of the water flows into the tank from the first outlet 31, while another part flows into the tank from the second outlet 32. At this time, a dual water flow structure of slow flow and waterfall flow is formed. The impact force of the waterfall flow in this dual water flow structure is smaller than the impact force of the water flow when the first outlet 31 is completely closed. Therefore, this dual water flow structure is suitable for situations where aquatic plant cultivation is in the later stages and fish have already been placed in the tank.

[0040] The water flow regulating device 3 includes a water guide groove 33 installed on the outlet of the housing 1, and a movable cover plate 34 disposed on the water guide groove 33; the inlet of the water guide groove 33 is connected to the outlet of the filter assembly 2, and a first outlet 31 is opened in the water guide groove 33; the movable cover plate 34 can open or close the first outlet 31; when the movable cover plate 34 opens the first outlet 31, water flows into the cylinder from the first outlet 31; when the movable cover plate 34 closes or reduces the size of the first outlet 31, water flows into the cylinder from the second outlet 32 ​​of the water guide groove 33; the second outlet 32 ​​of the water guide groove 33 is higher than the height of the first outlet 31; or the angle from the first outlet 31 into the cylinder is less than the angle from the second outlet 32 ​​into the cylinder.

[0041] The movable cover 34 is used to open or close the first outlet 31. Water flowing from the outlet of the filter assembly 2 flows into the guide channel 33. During the flow of water in the guide channel 33, the water first flows through the first outlet; when the first outlet 31 is open, water flows into the tank body from the first outlet 31, forming a slow flow; when the movable cover 34 is controlled to close the first outlet 31, some water flows to the second outlet 32, forming a dual-flow structure of slow flow and waterfall flow; when the movable cover 34 is controlled to completely close the first outlet 31, all water flows to the second outlet 32 ​​and into the tank body, forming a waterfall flow. This structure is equipped with a movable cover 34, which allows control of the water flow pattern and path simply by operating the movable cover 34, making the water flow suitable for different stages of setting up a planted aquarium, and is simple, convenient, and quick to use.

[0042] The inner bottom surface of the water guide channel 33 and the bottom surface of the movable cover plate 34 are both arc-shaped. The two ends of the movable cover plate 34 are hinged to the housing 1. When the movable cover plate 34 is swung to the position of the first water outlet 31, the movable cover plate 34 gradually closes the first water outlet 31. When the movable cover plate 34 swings away from the position of the first water outlet 31, the movable cover plate 34 gradually opens the first water outlet 31. During the process of pushing the movable cover plate 34 to swing, the movable cover plate 34 is in contact with the inner bottom surface of the guide channel. Therefore, when the movable cover plate 34 is swung to the position of the first water outlet 31, the first water outlet 31 is gradually closed. When the movable cover plate 34 swings away from the position of the first water outlet 31, the first water outlet 31 is gradually opened. This structure cleverly sets the inner bottom surface of the water guide channel 33 and the bottom surface of the movable cover plate 34 as matching arc surfaces, so that the movable cover plate 34 can move in an arc along the inner bottom surface of the water guide channel 33, and ensure that the bottom surface of the movable cover plate 34 can fit against the inner bottom surface of the water guide channel 33. The function of switching between waterfall flow and slow flow can be realized by simply pushing and pulling the movable cover plate 34 with one hand.

[0043] The movable cover 34 has locking blocks 341 or locking slots 342 on both sides, and correspondingly, the housing has locking slots 342 or locking blocks 341. The locking blocks 341 and locking slots 342 engage to form a multi-stage swing adjustment structure for the movable cover 34. The movable cover 34 is hinged to the housing 1 on both sides via connecting plates 35. Locking blocks 341 or locking slots 342 are located on the connecting plate 35, and corresponding locking slots 342 or locking blocks 341 are located on the housing. Multiple locking slots 342 are provided, and they are arranged in an arc shape. When the movable cover 34 is pushed to swing, the locking blocks 341 continuously engage with the corresponding locking slots 342, allowing the movable cover 34 to be stably stopped at the corresponding position, achieving the purpose of multi-stage adjustment. When the movable cover 34 swings to the position where the first outlet 31 is closed, the locking block 341 engages with the locking groove 342, keeping the movable cover 34 stably in the closed position. This prevents the movable cover 34 from being washed open by the continuous water flow, thus preventing the first outlet 31 from opening automatically. Additionally, the movable cover 34, through the engagement between the locking block 341 and the locking groove 342, can also be stably positioned with the first outlet 31 partially closed. Furthermore, the movable cover 34 of this structure can also be stably positioned with the first outlet 31 open, or stably extended from the second outlet 32, through the engagement between the locking block 341 and the locking groove 342. This design offers advantages such as versatility, convenient adjustment, and stable reliability.

[0044] like Figure 1 and Figure 9As shown, a flow regulating valve 4 is installed at the outlet of the water pump. The flow regulating valve 4 includes a valve body 41, a valve core 42 located inside the valve body 41, and a knob 43 located outside the valve body 41 for controlling the rotation angle of the valve core 41. One end of the valve core 42 has a thin plate structure. When the valve core 41 is rotated by the knob 43, the valve core 41 causes the water flow rate to cycle from large to small to large to small. When the valve core 41 sets the water flow rate to its minimum value, the water flow rate is not zero, which can prevent the water pumped by the pump from being unable to flow and causing overload, thus preventing damage to the water pump. The water pump inlet extends into the water body inside the cylinder through an inlet pipe. A filter head is installed at the lower end of the inlet pipe. Example

[0045] This embodiment is an improvement on the water flow regulating device 3 based on embodiment 1, such as... Figures 5 to 8 As shown, the water flow regulating device 3 includes a water guide trough 33 installed on the outlet of the housing 1, and a first movable cover plate 35 and a second movable cover plate 36 provided on the water guide trough 33; the inlet of the water guide trough 33 is connected to the outlet of the filter assembly 2, and a first outlet 31 is opened in the water guide trough 33. The first movable cover plate 35 can open or close the first outlet 31; the second movable cover plate 36 is used to adjust the water flow height of the second outlet 32 ​​of the water guide trough 33; when the first movable cover plate 35 is closed or the first outlet 31 is reduced, the water flow height and angle flowing into the cylinder are adjusted by adjusting the position of the second movable cover plate 36 at the second outlet 32 ​​of the water guide trough 33.

[0046] The first movable cover 35 is used to open or close the first outlet 31. Water flowing from the outlet of the filter assembly 2 flows into the water guide trough 33. During the flow of water in the water guide trough 33, the water first flows through the first outlet; when the first outlet 31 is open, the water flows from the first outlet 31 into the cylinder, forming a slow flow; when the first movable cover 35 is controlled to close the first outlet 31, some of the water flows to the second outlet 32, forming a dual water flow structure of slow flow and waterfall flow; when the first movable cover 35 is controlled to completely close the first outlet 31, all the water flows to the second outlet 32 ​​and into the cylinder, forming a waterfall flow. At the same time, the second movable cover 36 is used to adjust the height of the second outlet 32 ​​and the angle of the water flowing into the cylinder. When the first outlet 31 is closed or partially closed by the first movable cover 35, the second movable cover 36 can be swung to extend beyond the outlet end of the water guide trough 33, thereby increasing the height of the second outlet 32. This, in turn, increases the height of the waterfall flow into the tank from the second outlet 32. Because the height of the second outlet 32 ​​is increased, the speed of the water flowing into the tank from the second outlet 32 ​​increases, enhancing the disturbance to the water in the tank, improving water flow and oxygen content, and thus improving the fish survival rate. Furthermore, as the height of the waterfall increases, the angle at which the water flows into the tank also changes. Therefore, by adjusting the extension of the second movable cover 36, the angle at which the waterfall flows into the tank can be adjusted to increase the impact force on the water in the tank, further improving water flow and oxygen content.

[0047] The inner bottom surface of the water guide channel 33, the bottom surface of the first movable cover plate 35, and the bottom surface of the second movable cover plate 36 are all arc-shaped surfaces. Both ends of the first movable cover plate 35 and the second movable cover plate 36 are hinged to the housing 1. When the first movable cover plate 35 is swung to the position of the first water outlet 31, the first movable cover plate 35 gradually closes the first water outlet 31. When the first movable cover plate 35 swings away from the position of the first water outlet 31, the first movable cover plate 35 gradually opens the first water outlet 31. When the second movable cover plate 36 swings to the second water outlet 32 ​​extending out of the water guide channel 33, the water flow height into the cylinder is increased. During the process of pushing the first movable cover plate 35 to swing, the bottom surface of the first movable cover plate 35 is in contact with the inner bottom surface of the guide channel. Therefore, when the first movable cover plate 35 is swung to the position of the first water outlet 31, the first water outlet 31 is gradually closed. When the movable cover plate swings away from the position of the first water outlet 31, the first water outlet 31 is gradually opened. When the second movable cover 36 is pushed to swing and extend the second water outlet 32, the height of the second water outlet 32 ​​is increased, thereby increasing the height of the waterfall flow; conversely, the height of the waterfall flow is decreased. The first movable cover 35 is hinged to the housing 1 on both sides through the first connecting plate 37, and the second movable cover 36 is hinged to the housing 1 on both sides through the second connecting plate 38. This structure cleverly sets the inner bottom surface of the water guide channel 33 and the bottom surfaces of the first movable cover 35 and the second movable cover 36 as matching arc surfaces, so that the first movable cover 35 and the second movable cover 36 can move in an arc along the inner bottom surface of the water guide channel 33, and ensure that the bottom surfaces of the first movable cover 35 and the second movable cover 36 can fit against the inner bottom surface of the water guide channel 33. Therefore, the function switching between waterfall flow and slow flow can be achieved by pushing and pulling the first movable cover 35 with one hand. This structure can control the opening, closing, or reducing of the first water outlet 31 via the first movable cover plate 35, thereby controlling the opening, closing, and flow rate of the slow flow. Simultaneously, it can control the height of the second water outlet 32 ​​via the second movable cover plate 36, thereby controlling the flow rate and angle of the waterfall. Therefore, by controlling the swing position of the first movable cover plate 35 and the second movable cover plate 36, the movement state of the water flow at the first water outlet 31 and the second water outlet 32 ​​can be controlled. This makes it suitable for all stages of a planted aquarium, from newly set up the breeding tank to water conditioning and fish raising, and has the advantages of high versatility, ease of use, and diverse functions.

[0048] The first movable cover plate 35 has first locking blocks 351 or first locking slots 352 on both sides, and correspondingly, the housing 1 has first locking slots 352 or first locking blocks 351. A multi-stage swing adjustment structure for the first movable cover plate 35 is formed by the engagement between the first locking blocks 351 and the first locking slots 352. Similarly, the second movable cover plate 36 has second locking blocks 361 or second locking slots 362 on both sides, and correspondingly, the housing 1 has second locking slots 362 or second locking blocks 361. A multi-stage swing adjustment structure for the second movable cover plate is formed by the engagement between the second locking blocks 361 and the second locking slots 362. Multiple first locking slots 352 and second locking slots 362 are provided, and they are arranged in an arc shape. When the first movable cover plate 35 is pushed to swing, the first locking blocks 351 continuously engage with the corresponding first locking slots 352, allowing the first movable cover plate 35 to be stably stopped at the corresponding position, achieving the purpose of multi-stage adjustment. When the first movable cover 35 swings to the position where the first outlet 31 is closed, the first locking block 351 engages with the first locking groove 352, keeping the first movable cover 35 stably in the closed position of the first outlet 31. This prevents the first movable cover 35 from being washed open by the continuous flow of water, thus preventing the first outlet 31 from being automatically opened. Additionally, the first movable cover 35, through the cooperation between the first locking block 351 and the first locking groove 352, can also be in a stable position where the first outlet 31 is partially closed. The first movable cover 35 of this structure can also be in a stable position where the first outlet 31 is open, or in a stable position where the second outlet 32 ​​is extended, through the cooperation between the first locking block 351 and the first locking groove 352. This structure offers advantages such as versatility, convenient adjustment, and stable reliability.

[0049] The second movable cover 36 can adjust the extension of the second movable cover 36 out of the second outlet 32 ​​through the engagement between the second locking block 361 and the second locking groove 362, and keep it stably in that position, preventing the second movable cover 36 from being pushed by the continuous flushing of water, which would cause changes in the height and angle of the second outlet 32.

[0050] The second movable cover plate 36 is provided with a baffle 6 with multiple diversion channels 61 at the end away from the first outlet 31; when the water flows through the baffle 6, the water flow is diverted into multiple branches. The diversion channels 61 disperse the incoming water flow into multiple water flows to prevent a large number of water droplets from splashing out due to excessive water volume and concentration.

[0051] 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 aquarium filter with waterfall flow and slow flow switching 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 draws water from the cylinder and flows it through the filter assembly. The water flowing through the filter assembly flows into the cylinder from the outlet of the housing. The outlet of the housing is equipped with a water flow regulating device, which adjusts the flow rate and / or angle of the water flowing into the cylinder to form a waterfall flow and / or a slow flow.

2. The external aquarium filter with waterfall flow and slow flow switching function according to claim 1, characterized in that, The water flow regulating device has two outlets with different exit angles. The angle between the water flowing into the cylinder through the first outlet and the water surface is smaller than the angle between the water flowing into the cylinder through the second outlet and the water surface. The water flow regulating device controls the water flowing into the cylinder to flow out from the first outlet, forming a slow flow. The water flow regulating device controls the water flowing into the cylinder to flow out from the second outlet, forming a waterfall flow.

3. An external aquarium filter with waterfall flow and slow flow switching function according to claim 1, characterized in that, The water flow regulating device has two water outlets at different heights. The water flow regulating device controls the water flowing from the filter assembly to flow out from the first water outlet, forming a slow flow. The water flow regulating device controls the water flowing from the filter assembly to flow out from the second water outlet, forming a waterfall flow. The height of the second water outlet is higher than that of the first water outlet.

4. An external aquarium filter with waterfall flow and slow flow switching function according to claim 2 or 3, characterized in that, When the water flow regulating device opens the first outlet, water flows into the cylinder from the first outlet, forming a slow flow; when the water flow regulating device closes or reduces the size of the first outlet, water flows into the cylinder from the second outlet, forming a waterfall flow.

5. An external aquarium filter with waterfall flow and slow flow switching function according to claim 2 or 3, characterized in that, The water flow regulating device includes a water guide groove installed on the outlet of the housing, and a movable cover plate provided on the water guide groove; the inlet of the water guide groove is connected to the outlet of the filter assembly, and a first outlet is opened in the water guide groove; the movable cover plate can open or close the first outlet. When the movable cover opens the first outlet, water flows into the cylinder from the first outlet; when the movable cover closes or reduces the size of the first outlet, water flows into the cylinder from the second outlet of the water guide channel; the second outlet of the water guide channel is higher than the height of the first outlet; or the angle from the first outlet into the cylinder is less than the angle from the second outlet into the cylinder.

6. An external aquarium filter with waterfall flow and slow flow switching function according to claim 5, characterized in that, The inner bottom surface of the water guide channel and the bottom surface of the movable cover plate are both arc-shaped surfaces, and the two ends of the movable cover plate are hinged to the shell. When the movable cover plate is swung to the first water outlet position, the movable cover plate gradually closes the first water outlet. When the movable cover plate swings away from the first water outlet position, the movable cover plate gradually opens the first water outlet.

7. An external aquarium filter with waterfall flow and slow flow switching function according to claim 2 or 3, characterized in that, The water flow regulating device includes a water guide channel installed on the outlet of the housing, and a first movable cover plate and a second movable cover plate provided on the water guide channel; the inlet of the water guide channel is connected to the outlet of the filter assembly, and a first outlet is opened in the water guide channel; the first movable cover plate can open or close the first outlet; the second movable cover plate is used to adjust the water flow height of the second outlet of the water guide channel. When the first movable cover is closed or the first water outlet is partially closed, the height and angle of the water flowing into the cylinder are adjusted by adjusting the position of the second movable cover at the second water outlet of the water guide channel.

8. An external aquarium filter with waterfall flow and slow flow switching function according to claim 7, characterized in that, The water guide channel, the first movable cover plate, and the second movable cover plate are all arc-shaped, and both ends of the first and second movable cover plates are hinged to the housing. When the first movable cover plate is swung to the first outlet position, the first movable cover plate gradually closes the first outlet. When the first movable cover plate swings away from the first outlet position, the first movable cover plate gradually opens the first outlet. When the second movable cover plate swings to the second outlet extending out of the water guide channel, the height of the water flowing into the cylinder is increased.

9. An external aquarium filter with waterfall flow and slow flow switching function according to claim 5, characterized in that, The movable cover plate has locking blocks or slots on both sides, and correspondingly, the housing has locking slots or locking blocks; the locking blocks and slots are used to form a multi-stage swing adjustment structure for the movable cover plate.

10. An external aquarium filter with waterfall flow and slow flow switching function according to claim 7, characterized in that, The first movable cover plate has a first locking block or a first locking groove on both sides, and correspondingly, the housing has a first locking groove or a first locking block; the first movable cover plate has a multi-stage swing adjustment structure through the locking between the first locking block and the first locking groove; the second movable cover plate has a second locking block or a second locking groove on both sides, and correspondingly, the housing has a second locking groove or a second locking block; the second movable cover plate has a multi-stage swing adjustment structure through the locking between the second locking block and the second locking groove.

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