An external filter bag filter for a fish tank which is easy to maintain

Abstract

The utility model discloses a fish tank external filter bag filter convenient to maintain relates to fish tank water purification technical field, including external filter groove body, special water pump subassembly and water inlet pipeline, the filter groove body is the groove structure of top open, its inside is equipped with the water turning board, and the quantity of water turning board at least selects one, the water turning board divides the filter groove body into two and above independent compartment that communicates in proper order, at least one in the independent compartment is set as the physical filter compartment, and at least one is set as the biochemical filter compartment, water pump subassembly and water inlet pipeline integrated pipeline connection, and water pump subassembly can be hung in the physical filter compartment inside. The utility model discloses since the physical filter compartment open design and filter bag direct visibility, the user can observe the dirt degree of filter bag at a glance to timely, accurate cleaning can be carried out, effectively avoid the problem of the decline of filter efficiency or overflow because of cleaning not in time.

Description

Technical Field

[0001] This utility model relates to the field of aquarium water purification technology, specifically to an easy-to-maintain external filter bag filter for aquariums, suitable for various aquariums such as freshwater and saltwater aquariums, enabling efficient water filtration, convenient maintenance, and intuitive monitoring of filtration status. Background Technology

[0002] Currently, aquarium filters on the market are mainly divided into several types, including built-in, storage box, bottom filter, canister filter, and external wall-mounted filters. Built-in filters occupy internal space in the aquarium, affecting aesthetics and making cleaning inconvenient. Common closed external canister filters or wall-mounted filters (such as the AnCai EX650) save space in the tank, but routine maintenance and cleaning require disassembling the main body to remove the filter media, which is cumbersome, time-consuming, and labor-intensive. Furthermore, users cannot visually assess the level of dirt in the main physical filtration unit (usually the filter media), making it difficult to accurately determine the optimal cleaning time. Therefore, there is an urgent need for a new type of filtration device that combines space-saving external installation, convenient maintenance and cleaning, and the ability to visually assess the condition of the filter media. Utility Model Content

[0003] This utility model provides an easy-to-maintain external filter bag for aquariums to solve the problems mentioned in the background art. It aims to overcome the shortcomings of existing aquarium filters, such as cumbersome maintenance, invisible filtration status, space occupation in the aquarium, and low functional integration. It provides an external filter bag for aquariums with reasonable structure, convenient maintenance, high filtration efficiency, and intuitive monitoring of filtration status.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An easy-to-maintain external filter bag for aquariums includes an external filter tank, a dedicated water pump assembly, and an inlet pipe.

[0005] The filter tank is a trough-shaped structure with an open top. It is equipped with a water-turning plate inside, and at least one water-turning plate is selected. The water-turning plate divides the filter tank into two or more independent compartments that are connected in sequence, and the height of the water-turning plate is lower than the overall height of the filter tank.

[0006] At least one of the independent compartments is configured as a physical filtration compartment, and at least one is configured as a biochemical filtration compartment.

[0007] The water pump assembly is connected to the inlet water pipeline integrated pipeline, and the water pump assembly can be suspended inside the physical filter compartment.

[0008] The water inlet pipeline is equipped with a water inlet and an oil film removal inlet.

[0009] The above technical solution includes an external filter tank, a dedicated water pump assembly, and an inlet pipe. The filter tank is divided into two or more interconnected independent compartments (including physical and biochemical filtration compartments) by at least one water-turning plate. The water pump assembly can be suspended in the physical filtration compartment. The inlet pipe is equipped with an inlet and an oil removal film inlet.

[0010] A further improvement of this utility model is that the number of water-turning plates is three, and the three water-turning plates divide the filter tank into a physical filtration chamber, a first biochemical filtration chamber, and a second biochemical filtration chamber that are connected in sequence.

[0011] The physical filtration compartment is for physical filtration and is used to place easily removable filter bags; the first and second biochemical filtration compartments are for biochemical filtration and are used to place biochemical filter media or to fit and install protein separators.

[0012] Using the above technical solution, the filter tank is divided into three interconnected physical filtration chambers (for easily accessible filter bags), a first biochemical filtration chamber, and a second biochemical filtration chamber (for biochemical filter media or protein separators) by three water-turning plates.

[0013] A further improvement of this utility model is that: the front outer wall of the filter tank is provided with a hanging slot, the side wall of the filter tank is provided with a water outlet, the height of the hanging slot is the same as the height of the water outlet, and the filter tank is hung on the outer wall of the fish tank through the hanging slot and the water outlet.

[0014] The above technical solution features a hanging slot on the front outer wall of the filter tank and a water outlet on the side wall. Both are at the same height and can be mounted on the outer wall of the aquarium using this matching structure.

[0015] A further improvement of this utility model is that the water pump assembly includes a submersible pump and a wire, and a switch is provided at the wire to control the power supply to the submersible pump.

[0016] The water inlet pipe is configured as a right-angle bend pipe fitting. The submersible pump is detachably connected to the interface of the right-angle bend pipe fitting, and the submersible pump is suspended inside the filter bag of the physical filter compartment through the right-angle bend pipe fitting.

[0017] The above technical solution includes a submersible pump, a wire with a switch, and a right-angle bend in the inlet pipe. The submersible pump is detachably connected to the bend and suspended inside the filter bag of the physical filter chamber through the bend.

[0018] A further improvement of this utility model is that the right-angle bend pipe fitting includes an inner section, an inner section of the fish tank, and a bend section. The inner section is located inside the filter tank and connected to the submersible pump. The inner section of the fish tank is located inside the fish tank. The bend section is equipped with a water flow regulating valve, which is used to regulate the water flow rate.

[0019] The above technical solution includes a right-angle bend pipe fitting that is connected to a submersible pump, a section inside the aquarium located in the aquarium, and a bend section with a water flow regulating valve (for regulating flow).

[0020] A further improvement of this utility model is that: the lower end of the inner section of the fish tank is provided with a water inlet, the top end of the inner section of the fish tank is provided with an oil removal film inlet, the end face of the oil removal film inlet is a beveled cut, and the oil removal film inlet can be in contact with the water surface of the fish tank.

[0021] The above technical solution includes a water inlet at the lower end of the inner section of the aquarium and an oil film removal inlet at the top (the end face is beveled so that it can fit in close to the water surface of the aquarium).

[0022] A further improvement of this utility model is that the filter bag is made of nylon mesh or polyester fiber, and the bag opening is provided with a plastic retaining ring. The plastic retaining ring is used to hang the filter bag in the filter tank, and the filter bag is fully exposed to the open area of ​​the physical filter chamber.

[0023] The above technical solution uses nylon mesh or polyester fiber material for the filter bag, with a plastic retaining ring at the bag opening, and is fully exposed to the open area of ​​the physical filter compartment.

[0024] A further improvement of this utility model is that: the power of the submersible pump is 5-50W, the rated flow rate is 500-1500L / h, the right-angle bend pipe fitting is integrally formed of acrylic material, and the connection method between the submersible pump and the right-angle bend pipe fitting is threaded connection or quick connection.

[0025] Using the above technical solution, the submersible pump has a power of 5-50W and a rated flow of 500-1500L / h. The right-angle bend pipe fitting is made of acrylic material and is integrally formed. The two are connected by threads or quick couplings.

[0026] Due to the adoption of the above technical solution, the technological progress achieved by this utility model compared to the prior art is as follows: 1. During routine maintenance of this utility model, first turn off the water pump switch, then directly remove the pipe assembly that integrates the water pump, and then remove the filter bag for cleaning or replacement. The entire process does not require disassembling the water pipes, moving the entire filter body, or touching the biochemical filter media in the second and third biochemical filter chambers, thus maximizing the protection of the stability of the biochemical filtration system and saving time and effort. If the water pump malfunctions and needs to be replaced, it is also very convenient.

[0027] 2. Due to the open design of the physical filter compartment and the direct visibility of the filter bag, users can easily observe the degree of dirt on the filter bag, thus enabling timely and accurate cleaning and effectively avoiding problems such as decreased filtration efficiency or overflow caused by untimely cleaning.

[0028] 3. This utility model is an externally mounted unit, which does not occupy the valuable viewing and biological activity space inside the aquarium. At the same time, the open-cell design is more convenient for placing and organizing filter media compared to a completely closed filter cartridge.

[0029] 4. The water flow path of this utility model is reasonably designed (fish tank → water inlet → water pump → filter bag → water flap → biological filter media grid → water outlet → fish tank), which ensures that the water first passes through physical filtration (filter bag) to remove large particulate impurities, and then passes through biological filtration (filter media) to decompose harmful substances. The process is scientific and the filtration effect is significant.

[0030] 5. The water inlet right-angle pipe fitting of this utility model integrates an oil film removal inlet, which can effectively remove oil film from the water surface and improve the dissolved oxygen content and aesthetics of the water. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This utility model Figure 1 A cross-sectional structural diagram of the middle filter tank and filter bag; Figure 3 This is a schematic diagram of the mounting structure of the filter tank and the fish tank according to this utility model. Figure 4 This is a cross-sectional structural diagram of the filter tank of this utility model.

[0032] In the diagram: 1. Filter tank; 11. Water flap; 12. Physical filtration chamber; 13. First biological filtration chamber; 14. Second biological filtration chamber; 15. Water outlet; 16. Suspension slot; 2. Water pump assembly; 21. Submersible pump; 22. Wire; 3. Right-angle bend pipe fitting; 31. Tank section; 32. Aquarium section; 33. Bend section; 34. Water flow regulating valve; 35. Water inlet; 36. Oil film removal inlet; 4. Filter bag; 5. Biological filter media; 6. Protein skimmer; 7. Aquarium. Detailed Implementation

[0033] like Figures 1-4 As shown, this utility model provides an easy-to-maintain external filter bag filter for aquariums, including an external filter tank 1, a dedicated water pump assembly 2, and an inlet pipe. The filter tank 1 has a hanging slot 16 on its front outer wall and an outlet 15 on its side wall. The height of the hanging slot 16 is the same as the height of the outlet 15. The filter tank 1 is hung on the outer wall of the aquarium 7 through the hanging slot 16 and the outlet 15. It should be noted that the water pump assembly 2 and the right-angle bend pipe fitting 3 are integrated and can rotate within a certain range around the filter bag 4 inside the filter bag 4, so as to adjust the position of the inlet 35 and the oil film removal inlet 36 inside the aquarium 7.

[0034] The filter tank 1 is a trough-shaped structure with an open top. It is equipped with a water-turning plate 11 inside, and the number of water-turning plates 11 is at least one. The water-turning plate 11 divides the filter tank 1 into two or more independent compartments that are connected in sequence. The height of the water-turning plate 11 is lower than the overall height of the filter tank 1. There are three water-turning plates 11. The three water-turning plates 11 divide the filter tank 1 into a physical filtration compartment 12, a first biochemical filtration compartment 13, and a second biochemical filtration compartment 14 that are connected in sequence.

[0035] At least one of the independent compartments is configured as a physical filtration compartment 12, and at least one is configured as a biochemical filtration compartment. The physical filtration compartment 12 is for physical filtration and is used to place a filter bag 4 that can be easily removed and placed. The filter bag 4 is made of nylon mesh or polyester fiber. The bag opening of the filter bag 4 is provided with a plastic retainer ring, which is used to hang the filter bag 4 in the filter tank. The filter bag 4 is completely exposed in the open area of ​​the physical filtration compartment 12. The first biochemical filtration compartment 13 and the second biochemical filtration compartment 14 are biochemical filtration compartments and are used to place biochemical filter media 5 or to adapt and install a protein separator 6.

[0036] The water pump assembly 2 is connected to the inlet water pipeline integrated pipeline, and the water pump assembly 2 can be suspended inside the physical filter chamber 12. The water pump assembly 2 includes a submersible pump 21 and a wire 22. The power of the submersible pump 21 is 5-50W and the rated flow rate is 500-1500L / h. A switch is installed at the wire 22 to control the power supply of the submersible pump 21.

[0037] The water inlet pipe is configured as a right-angle bend fitting 3, which is integrally molded from acrylic material. The interface between the submersible pump 21 and the right-angle bend fitting 3 is detachable. The connection between the submersible pump 21 and the right-angle bend fitting 3 is either threaded or quick-connect. The submersible pump 21 is suspended inside the filter bag 4 of the physical filter chamber 12 via the right-angle bend fitting 3. The right-angle bend fitting 3 includes an inner section 31, an inner section 32, and a bend section 33. 1 is located inside the filter tank 1 and connected to the submersible pump 21. The aquarium inner section 32 is located inside the aquarium 7. The bend section 33 is equipped with a water flow regulating valve 34, which is used to regulate the water flow rate. The side wall of the aquarium inner section 32 is equipped with a water inlet 35. The top of the aquarium inner section 32 is equipped with an oil removal film inlet 36. The end face of the oil removal film inlet 36 is a beveled cut, and the oil removal film inlet 36 can be in contact with the water surface of the aquarium 7. The water inlet pipe is equipped with a water inlet 35 and an oil removal film inlet 36.

[0038] The present invention will be further described in detail below with reference to the implementation scheme and embodiments: Implementation Plan like Figures 1-4 As shown in the figure, this embodiment provides a specific structure for an easy-to-maintain external filter bag filter for aquariums, as detailed below: Filter tank 1: Made of food-grade PP plastic through one-piece injection molding, with a length of 300-500mm, a width of 100-250mm, and a height of 200-300mm. Three parallel water-turning plates 11 are arranged along the length of the tank. The height of the water-turning plates 11 is 5-15mm (preferably 8mm) lower than the upper edge of the filter tank 1. The three water-turning plates 11 divide the filter tank 1 into sequentially connected physical filtration chambers 12, a first biological filtration chamber 13, and a second biological filtration chamber 14. The depth of the physical filtration chambers 12 is the same as the height of the filter tank 1, and they are suitable for placing cylindrical or square filter bags 4. The filter bags 4 are made of nylon mesh or polyester fiber (mesh count 10). The filter bag has a mesh size of 0-200 mesh and a plastic retaining ring at the opening. The plastic retaining ring is used to hang the filter bag 4 in the filter tank. The depth of the first biological filter chamber 13 and the second biological filter chamber 14 is 100-260mm. They are used to fill the biological filter media 5 (such as ceramic rings, biological balls, live rock fragments, etc.) or install the protein separator 6. The upper part of the side wall of the second biological filter chamber 14 of the filter tank 1 has an outlet 15 with an inner diameter of 20-30mm. The outer wall of the front of the filter tank 1 has two symmetrical hanging slots 16 at the height of the outlet 15. The opening of the hanging slots 16 faces the aquarium 7 and can be engaged with the outer wall of the aquarium 7 to fix the filter tank 1.

[0039] Water pump assembly 2: Submersible pump 21 is a DC silent submersible pump 21 with a power of 5-20W and a rated flow of 500-1500L / h. The outlet 15 of submersible pump 21 is detachably connected to the groove section 31 of right angle bend pipe fitting 3 through a thread or quick-connect structure. The length of wire 22 is 1.5-2.0m. The switch is a rocker switch, integrated into the end of wire 22 near the power plug, for convenient control of the power on and off of submersible pump 21.

[0040] Right-angle bend pipe fitting 3: Made of acrylic material in one piece, with an overall 90° bend structure, including inner section 31 (length 50-80mm), inner section 32 (length 100-150mm), and bend section 33; the outer wall of the bend section 33 is equipped with a knob-type water flow regulating valve 34, which can change the water flow cross-sectional area inside the fitting by rotating the regulating valve to achieve flow regulation; the lower side wall of the inner section 32 is equipped with a water inlet 35 (inner diameter 15-25mm), and the top of the inner section 32 is equipped with an oil film removal inlet 36 (inner diameter 8-12mm). The end face of the oil film removal inlet 36 is beveled, which can be set to fit the water surface of the aquarium 7, and the oil film is adsorbed by the negative pressure of the water flow. Example 1

[0041] like Figures 1-4 As shown, this example is for use in a freshwater tropical fish tank 7. This embodiment is suitable for a freshwater tropical fish tank 7 with a length of 60cm, a width of 30cm, and a height of 40cm (for raising small tropical fish such as guppies and neon tetras). The specific configuration is as follows: Filter tank 1: A PP plastic tank with a length of 350mm, a width of 100mm, and a height of 250mm is selected. The height of the water-tumbling plate 11 is 242mm (8mm lower than the upper edge of the tank). Physical filtration: The physical filtration compartment 12 holds cylindrical filter bags 4 (150mm in diameter and 220mm in height) made of 150-mesh nylon mesh. The bag opening is secured to the filter tank with a plastic clip. Biochemical filtration: The first biochemical filtration chamber 13 is filled with ceramic rings with a diameter of 8-10 mm (filling height 200 mm, stacked volume about 5 L), and the second biochemical filtration chamber 14 is filled with biochemical balls with a length of 10-15 mm (filling height 200 mm, stacked volume about 5 L). Water pump assembly 2: Select a 10W DC submersible pump 21 with a rated flow of 800L / h, a wire 22 with a length of 1.8m, and a rocker switch; Water inlet pipe: The groove section 31 of the right-angle bend fitting 3 is 60mm long, the aquarium section 32 is 120mm long, the water inlet 35 has an inner diameter of 20mm, and the oil film removal inlet 36 has an inner diameter of 10mm. During installation, the water inlet 35 of the aquarium section 32 is located 50mm below the water level in the aquarium 7, and the oil film removal inlet 36 is flush with the water surface in the aquarium 7. The flow rate is adjusted to 600L / h through the water flow regulating valve 34 to ensure that the water flows through the filter bag 4 at a moderate speed, which avoids impurities from penetrating the filter bag 4 and prevents the filter bag from clogging too quickly. Example 2

[0042] like Figures 1-4 As shown, this example is for use in saltwater coral aquariums. It is suitable for saltwater coral aquariums with a length of 80cm, a width of 40cm, and a height of 50cm (for keeping hard corals, soft corals, etc.). The specific configuration is as follows: Filter tank 1: PP plastic tank with a length of 450mm, a width of 220mm, and a height of 280mm is selected. The height of the water-tumbling plate 11 is 272mm (8mm lower than the upper edge of the tank). Physical filtration: The physical filtration chamber 12 holds a cylindrical filter bag 4 (100mm in diameter and 250mm in height) made of 200-mesh polyester fiber. The bag opening is secured with a plastic clip to hang the filter bag 4 inside the filter tank. Biochemical filtration and functional adaptation: The first biochemical filtration chamber 13 is adapted to install a Q100 mini protein separator 6 (power 8W, water treatment capacity 500-800L / h). The inlet pipe of the separator is connected to the outlet 15 of the submersible pump 21 via a quick connector. The outlet pipe of the separator extends to the second biochemical filtration chamber 14. The second biochemical filtration chamber 14 is filled with activated rock fragments with a diameter of 5-8mm (filling height 220mm, stacked volume approximately 10L). Water pump assembly 2: Select a 15W DC submersible pump 21 with a rated flow of 1200L / h, a wire 22 with a length of 2.0m, and a rocker switch; Water inlet pipe: The length of the groove section 31 of the right-angle bend pipe fitting 3 is 70mm, the length of the fish tank section 32 is 140mm, the inner diameter of the water inlet 35 is 25mm, and the inner diameter of the oil film removal inlet 36 is 12mm. During installation, the water inlet 35 of the fish tank section 32 is located 80mm below the water level in the fish tank 7, and the oil film removal inlet 36 is flush with the water surface of the fish tank 7. The flow rate is adjusted to 900L / h through the water flow regulating valve 34 to ensure that the protein skimmer 6 generates bubbles normally (bubble diameter 1-2mm), while meeting the circulation filtration requirements of the saltwater tank and maintaining the stability of water salinity and water quality.

[0043] The working principle of this easy-to-maintain external aquarium filter bag will be explained in detail below.

[0044] like Figures 1-4As shown, firstly, the filter tank 1 is connected to the outer wall of the fish tank 7 via the hanging slot 16 on the front outer wall, so that the water outlet 15 of the filter tank 1 is level with the water level of the fish tank 7, ensuring that the filtered water can flow smoothly back to the fish tank 7; then, the filter bag 4 is placed into the physical filter compartment 12 of the filter tank 1, the water pump assembly 2 is connected to the inner section 31 of the right-angle bend pipe fitting 3, and then the inner section 32 of the right-angle bend pipe fitting 3 is placed into the fish tank 7, so that the water inlet 35 is submerged in the water of the fish tank 7 and the oil film removal inlet 36 is close to the water surface, while the water pump is suspended inside the filter bag 4. Secondly, fill the filter tank with some water, enough to cover the submersible pump, and then close the switch on the wire 22 of the water pump assembly 2. The submersible pump 21 will be powered on and will generate negative pressure to drive the water flow in the fish tank 7. Secondly, under negative pressure, part of the water in the fish tank 7 enters the pipe fitting through the inlet 35 of the fish tank section 32, and the other part of the oil film on the water surface is absorbed into the pipe fitting through the oil removal inlet 36, and the oil film and water mix in the pipe fitting. Then, the mixed water is transported to the submersible pump 21 through the pipes. After being pressurized by the submersible pump 21, it is discharged into the filter bag 4. The water permeates from the inside to the outside of the filter bag 4. Large particles of impurities such as fish feces, uneaten food, and organic debris in the water are intercepted by the filter bag 4, thus completing physical filtration. Then, the water that has completed physical filtration flows out of the filter bag 4 to the bottom of the physical filtration chamber 12. Due to the obstruction of the tipping plate 11, the water needs to overflow the tipping plate 11 to enter the first biological filtration chamber 13. If it is used in a freshwater aquarium 7 (Example 1), the water flows through the ceramic rings of the first biological filtration chamber 13 and the bio-balls of the second biological filtration chamber 14. The nitrifying bacteria attached to the surface of the filter media decompose the ammonia nitrogen and nitrite in the water into harmless nitrate, thus completing the biological filtration. If it is used in a marine coral aquarium (Example 2), the water first enters the protein separator 6 of the first biological filtration chamber 13. The separator adsorbs the protein, organic debris and other substances in the water through the generated microbubbles, forming foam that is discharged. The treated water then enters the live rock fragment layer of the second biological filtration chamber 14. The bacteria on the surface of the live rock fragments further decompose harmful substances, thus completing the biological filtration. Finally, the water that has completed biological filtration flows back to the aquarium 7 from the outlet 15 of the second biological filtration chamber 14, forming a complete circulating filtration process. When the filter bag 4 becomes clogged due to excessive impurities, the water level in the physical filtration chamber 12 gradually rises. Because the height of the tipping plate 11 is lower than the upper edge of the filter tank 1, the water can overflow the tipping plate 11 and directly enter the subsequent chambers, preventing water from overflowing the filter tank 1. At the same time, the user can directly observe the dirt status of the filter bag 4 through the top opening of the filter tank 1, and promptly turn off the water pump switch, remove the filter bag 4 for cleaning or replacement, and ensure that the filtration system continues to work stably.

[0045] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the protection scope of the present invention.

Claims

1. An easy-to-maintain external filter bag filter for aquariums, characterized in that, It includes an external filter tank (1), a dedicated water pump assembly (2), and an inlet pipe; The filter tank (1) is a trough-shaped structure with an open top. It is equipped with a water-turning plate (11) inside. At least one water-turning plate (11) is selected. The water-turning plate (11) divides the filter tank (1) into two or more independent compartments that are connected in sequence. The height of the water-turning plate (11) is lower than the overall height of the filter tank (1). At least one of the independent compartments is configured as a physical filtration compartment (12), and at least one is configured as a biochemical filtration compartment; The water pump assembly (2) is connected to the water inlet pipeline integrated pipeline, and the water pump assembly (2) can be suspended inside the physical filter chamber (12); The water inlet pipeline is provided with a water inlet (35) and an oil film removal inlet (36).

2. The easy-to-maintain external filter bag filter for aquariums according to claim 1, characterized in that, The number of the water-turning plates (11) is three, and the three water-turning plates (11) divide the filter tank (1) into a physical filter compartment (12), a first biochemical filter compartment (13) and a second biochemical filter compartment (14) connected in sequence. The physical filtration chamber (12) is for physical filtration and is used to place a filter bag (4) that can be easily removed and placed. The first biochemical filtration chamber (13) and the second biochemical filtration chamber (14) are biochemical filtration chambers and are used to place biochemical filter material (5) or to fit and install a protein separator (6).

3. The easy-to-maintain external filter bag filter for aquariums according to claim 1, characterized in that, The filter tank (1) has a hanging slot (16) on the front outer wall and a water outlet (15) on the side wall. The height of the hanging slot (16) is the same as the height of the water outlet (15). The filter tank (1) is hung on the outer wall of the fish tank (7) through the hanging slot (16) and the water outlet (15).

4. The easy-to-maintain external filter bag filter for aquariums according to claim 1, characterized in that, The water pump assembly (2) includes a submersible pump (21) and a wire (22). A switch is provided at the wire (22) to control the power supply to the submersible pump (21). The water inlet pipe is configured as a right-angle bend pipe fitting (3), the submersible pump (21) is detachably connected to the interface of the right-angle bend pipe fitting (3), and the submersible pump (21) is suspended inside the filter bag (4) of the physical filter chamber (12) through the right-angle bend pipe fitting (3).

5. The easy-to-maintain external filter bag filter for aquariums according to claim 4, characterized in that, The right-angle bend pipe fitting (3) includes a groove section (31), a fish tank section (32) and a bend section (33). The groove section (31) is located inside the filter tank (1) and connected to the submersible pump (21). The fish tank section (32) is located inside the fish tank (7). The bend section (33) is equipped with a water flow regulating valve (34), which is used to regulate the water flow rate.

6. The easy-to-maintain external filter bag filter for aquariums according to claim 5, characterized in that, The lower end of the inner section (32) of the fish tank is provided with a water inlet (35), and the top end of the inner section (32) of the fish tank is provided with an oil removal film inlet (36). The end face of the oil removal film inlet (36) is a slanted cut, and the oil removal film inlet (36) can be in contact with the water surface of the fish tank (7).

7. The easy-to-maintain external filter bag filter for aquariums according to claim 2, characterized in that, The filter bag (4) is made of nylon mesh or polyester fiber. The bag opening of the filter bag (4) is provided with a plastic retainer ring. The plastic retainer ring is used to hang the filter bag (4) in the filter tank and the filter bag (4) is completely exposed to the open area of ​​the physical filter chamber (12).

8. The easy-to-maintain external filter bag filter for aquariums according to claim 4, characterized in that, The submersible pump (21) has a power of 5-50W and a rated flow of 500-1500L / h. The right-angle bend pipe fitting (3) is integrally formed with acrylic material. The submersible pump (21) and the right-angle bend pipe fitting (3) are connected by threaded connection or quick connection.

Images