A hanging built-in filter

Abstract

This utility model discloses a hanging built-in filter, including a filter body and a hanging structure. The hanging structure includes a vertically arranged insertion groove on the side wall of the filter body and a hanging component that is movably inserted into the insertion groove. The hanging component includes a vertically arranged connecting part and a horizontally arranged upper part for hanging with a fish tank. The connecting part is vertically inserted into the insertion groove and can move vertically within the insertion groove to replace the hanging component or adjust its height. A positioning structure is provided between the connecting part and the insertion groove. The positioning structure includes multiple horizontally arranged and vertically arranged slots and a long hook. The hook head is engaged in the slot. The hanging component can be designed as an "L"-shaped hook and abutment wall structure or an inner abutment wall and an outer abutment wall structure. This utility model can match fish tanks of different shapes by changing the hanging components of the hanging component with different structures. It has strong applicability and is easy to use, solving the technical problems of narrow applicability and non-adjustable height of existing hanging built-in filters.

Description

Technical Field

[0001] This utility model relates to the field of aquarium filtration equipment, specifically to a hanging built-in filter. Background Technology

[0002] With the increasing popularity of aquarium keeping, aquarium filters, as essential equipment for maintaining water quality, are receiving more and more attention for their installation methods and ease of use. Currently, the most common aquarium filters on the market are divided into two types: built-in and external. Among them, the built-in hanging filter is widely used due to its advantages such as easy installation.

[0003] Existing hanging filters typically employ a fixed hanging structure. For example, CN222898054U discloses a filter installation structure including a filter body and a hanger mounted on the filter body. The hanger has a hanging space with a lower opening and a locking space connected to the hanging space. A locking element for pressing against the aquarium wall is movably inserted into the locking space. The locking element cooperates with the hanger to clamp and fix the side wall of the aquarium, thereby achieving the hanging installation of the filter. CN117121863A discloses a fully automatic filter that is easy to assemble onto an aquarium. It is equipped with a hanging fixing structure and a locking screw, which can ensure the stability of the hanging fixing structure after installation, and the filter can be disassembled through a plug-in assembly.

[0004] Regarding the structural design of filters, CN217936947U discloses an aquarium filter with easily replaceable filter elements. Its filter assembly consists of multiple filter housings connected sequentially, with the housings linked and fixed by a snap-fit ​​structure, allowing users to easily replace the filter modules within the housings. CN221901982U discloses a user-friendly aquarium filter where a magnetic snap-fit ​​structure allows the cover to be detachably installed on the main body, facilitating the removal and installation of the filter media.

[0005] In addition, CN206949266U discloses an easy-to-change fish tank, which has a drain outlet on one side of the fish tank body, a filter screen and a baffle plate at the drain outlet, and a groove for inserting the filter screen and the baffle plate on the side wall of the fish tank body. The groove is vertically arranged and has a sealing mechanism that cooperates with the baffle plate.

[0006] However, existing hanging filters have the following problems: First, most hanging filter designs are primarily suited for aquariums with flat sidewalls, such as typical square aquariums. They are less adaptable to curved, irregularly shaped, or other aquarium shapes, making universal installation impossible. Second, existing hanging structures are usually fixed designs, unable to adjust their height according to different aquarium depths and water levels. This results in the filter body's position within the aquarium being inflexible, affecting filtration efficiency. Third, existing hanging structures are generally one-piece designs. When adapting to different types of aquariums, the entire filter often needs to be replaced, increasing user costs. Finally, the installation and disassembly of existing hanging structures are relatively complex, requiring the use of screws and other fasteners, making daily maintenance and cleaning inconvenient for users.

[0007] Therefore, there is an urgent need for a hanging built-in filter that is height-adjustable, suitable for aquariums of different shapes, and easy to install and remove, in order to meet users' needs for filter versatility and convenience. Utility Model Content

[0008] The main purpose of this utility model is to provide a hanging built-in filter, which aims to make the installation height of the filter body adjustable and adaptable to aquariums of different shapes.

[0009] This utility model proposes a hanging built-in filter, including a filter body and a hanging structure. The hanging structure includes a vertically arranged insertion groove on the side wall of the filter body and a hanging member movably inserted into the insertion groove. The hanging member includes a vertically arranged connecting part and a horizontally arranged hanging head part at the upper end. The connecting part is vertically inserted into the insertion groove and can move vertically within the insertion groove to replace the hanging member or adjust its height. A positioning structure is provided between the connecting part and the insertion groove. The hanging built-in filter can be matched with aquariums of different shapes by changing the hanging members of different hanging head parts.

[0010] Preferably, the positioning structure includes a plurality of slots arranged horizontally and vertically in sequence, and a long hook. The long hook includes a vertically arranged elastically pressable lever and a hook head disposed at the lower end of the lever. The hook head engages in the slot. The hook head has an upwardly inclined sliding surface on its upper inner side facing the slot, which slopes from bottom to top and away from the slot. The hook head also has a downwardly inclined sliding surface on its lower inner side facing the slot, which slopes from top to bottom and away from the slot. The upwardly inclined sliding surface is located above the downwardly inclined sliding surface. The slot is composed of two adjacent spaced-apart clips. When the hook moves from top to bottom in the insertion slot, the clips apply force from top to bottom to the upper inclined sliding surface, causing the long arm hook to push away from the slot, thereby allowing the hook head to slide into the next level slot step by step. When the hook moves from bottom to top in the insertion slot, the clips apply force from bottom to top to the lower inclined sliding surface, causing the long arm hook to push away from the slot, thereby allowing the hook head to slide into the next level slot step by step.

[0011] Preferably, the card strip has a triangular cross-section and includes an upper inclined abutment surface that can engage with the lower inclined sliding surface and a lower inclined abutment surface that can engage with the upper inclined sliding surface.

[0012] Preferably, the slot is located on the front side of the connector, and the long arm hook is located in the hollow area of ​​the side wall opposite to the slot of the insertion groove.

[0013] Preferably, a guide slide is vertically provided in the insertion slot, the guide slide extends out of the insertion slot, and the connecting part has a sliding part adapted to the guide slide. When the hook member moves in the insertion slot, the sliding part slides along the guide slide.

[0014] Preferably, the hook-and-loop connector is provided with an "L"-shaped snap hook and an abutment wall facing downwards, and the abutment wall and the snap hook are spaced apart from each other.

[0015] Preferably, the hook-on end is provided with an inner abutment wall and an outer abutment wall facing downwards. The inner abutment wall and the outer abutment wall are arranged at intervals relative to each other. The inner abutment wall is provided with a stepped structure, the stepped structure is facing the outer abutment wall, and the distance between the stepped structure and the outer abutment wall gradually decreases from bottom to top.

[0016] Preferably, the hook-on component has two types: hook-on component one and hook-on component two. Hook-on component one has an "L"-shaped snap hook and an abutment wall facing downwards at the hook-on end, with the abutment wall and the snap hook being spaced apart from each other. Hook-on component two has an inner abutment wall and an outer abutment wall facing downwards at the hook-on end, with the inner abutment wall and the outer abutment wall being spaced apart from each other. The inner abutment wall has a stepped structure facing the outer abutment wall, and the distance between the stepped structure and the outer abutment wall gradually decreases from bottom to top.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] By designing replaceable mounting brackets and an adjustable height plug-in structure, this hanging built-in filter is suitable not only for aquariums with flat side walls (such as square aquariums) but also for most common irregular-shaped aquariums. The height of the filter body within the aquarium can be adjusted by moving the mounting brackets up and down in the plug-in slots, and the position is fixed by a positioning structure after adjustment. Different aquarium shapes can be matched by replacing mounting brackets with different structures; for example, mounting bracket one is suitable for irregular-shaped aquariums with an inverted L-shaped upper side wall, while mounting bracket two is suitable for aquariums with flat side walls. This expands the applicability of the hanging built-in filter and solves the technical problems of narrow applicability and non-adjustable height in existing hanging built-in filters. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the hanging built-in filter and two types of hanging parts in an embodiment of this utility model.

[0020] Figure 2 This is a schematic diagram of the assembly of the hanging built-in filter and the hanging component in an embodiment of this utility model.

[0021] Figure 3 This is a schematic diagram of the assembly of the hanging built-in filter and the hanging bracket in an embodiment of this utility model.

[0022] Figure 4 This is a schematic diagram of the insertion groove on the back of the filter body of the hanging built-in filter in an embodiment of this utility model.

[0023] Figure 5 This is a cross-sectional view of the filter body of the hanging built-in filter in an embodiment of this utility model.

[0024] Figure 6 This is a schematic diagram of the structure of the first hanging component in an embodiment of this utility model.

[0025] Figure 7 This is a cross-sectional view of the assembly of the hanging built-in filter and the hanging bracket in an embodiment of this utility model.

[0026] Figure 8 This is an assembly diagram showing the hanging built-in filter being installed onto a square fish tank via a second mounting bracket in an embodiment of this utility model.

[0027] Figure 9 This is an assembly diagram showing the hanging built-in filter being installed onto an irregularly shaped fish tank via a mounting bracket in an embodiment of this utility model.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals identify the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0030] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] Reference Figures 1 to 9This utility model provides a hanging built-in filter, including a filter body 1 and a hanging structure. The filter body 1 includes a shell, a filter element and a centrifugal pump installed inside the shell. An inlet is provided at the bottom of the shell, and an outlet is provided on the upper outer side of the shell. A filter chamber communicating with the inlet is provided inside the shell, and the filter element is installed in the filter chamber. A centrifugal pump chamber and an outlet chamber are also provided inside the shell. The centrifugal pump chamber is located above the filter chamber. The centrifugal pump chamber includes a power chamber and an impeller chamber. The power system of the centrifugal pump is installed in the power chamber, and the impeller of the centrifugal pump is located in the impeller chamber. The power system is a waterproof motor, which drives the impeller to rotate. The power chamber is located above the impeller chamber. The impeller chamber and the filter chamber are connected through a connecting port. The impeller of the centrifugal pump is located directly above and facing the connecting port. A connecting channel communicating with the outlet chamber is provided on the side of the impeller of the centrifugal pump. The filter body is installed and fixed to the side wall of the aquarium via a hanging structure. The filter chamber and impeller chamber of the filter body are immersed in the water in the aquarium. Water enters the filter chamber from the inlet and is filtered by the filter element before entering the impeller chamber. The power system drives the impeller to rotate and generate centrifugal force, which outputs the filtered water in the impeller chamber to the outlet chamber. The filtered water flows back into the aquarium from the outlet, realizing the circulation and filtration of water in the aquarium.

[0033] The mounting structure includes a vertically positioned insertion slot 10 on the back of the filter body 1 and a mounting bracket that is movably inserted into the insertion slot 10. The mounting bracket is inverted L-shaped, comprising a vertically positioned elongated connecting part and a horizontally positioned mounting head at the upper end of the connecting part. The connecting part is vertically inserted into the insertion slot 10 and can move vertically within the insertion slot 10 to replace the mounting bracket or adjust its height. A positioning structure is provided between the connecting part and the insertion slot 10. When the mounting bracket moves to a suitable position, it is positioned within the insertion slot 10 by the positioning structure. The mounting head is used to hang on the side wall of the aquarium to achieve filter installation and fixation. Due to different aquarium depths and water levels, the position of the filter body 1 extending into the aquarium also needs to be adjusted according to the water level. This product allows adjustment of the height of the filter body 1 within the aquarium by moving the mounting bracket up and down within the insertion slot 10, and the positioning structure fixes the position after adjustment to a suitable level.

[0034] The positioning structure includes multiple slots arranged horizontally and vertically in sequence, and a long hook 11. The slots are located on the front side of the connecting part. The front side wall of the insertion groove 10 has an inverted U-shaped hollow area with an opening at the lower end, and the long hook 11 is located in the hollow area. The long hook 11 is made of plastic and includes a vertically arranged elastically pressable lever 111 and a hook head 112 located at the lower end of the lever 111. The upper end of the lever 111 is connected to the upper edge of the hollow area, and there is a gap between the two sides of the lever 111 and the two side edges of the hollow area, so that the lever 111 can be pushed back and forth. When the connecting part is inserted into the insertion groove 10, the hook head 112 engages in the slot, thereby positioning the connecting part in the insertion groove 10.

[0035] The hook head 112 has an upwardly inclined sliding surface 1121 facing the upper side of the card slot, which slopes upwards and away from the card slot. The hook head 112 also has a downwardly inclined sliding surface 1122 facing the lower side of the card slot, which slopes downwards and away from the card slot. The upwardly inclined sliding surface 1121 is located above the downwardly inclined sliding surface 1122. The card slot is composed of two adjacent, spaced-apart card strips. Each card strip has a triangular cross-section and includes an upwardly inclined abutment surface that engages with the downwardly inclined sliding surface and a downwardly inclined abutment surface that engages with the upwardly inclined sliding surface. Insert the hook into the insertion slot from top to bottom. Use your hand to forcefully move the hook into the insertion slot 10 from top to bottom. The downward inclined contact surface of the locking strip applies force from top to bottom to the upward inclined sliding surface 1121 of the hook head 112, causing the long hook 11 to push away from the slot. This allows the hook head 112 to slide into the next level slot, realizing the downward movement of the hook in the insertion slot 10. When the hook stops moving, the hook head 112 is placed in the corresponding slot at that position, fixing the hook in that position.

[0036] When the hook needs to be lifted or removed, the hook is moved upward in the insertion slot 10 by hand. The upward inclined contact surface of the locking strip applies force from bottom to top to the downward inclined sliding surface 1122 of the hook head 112, causing the long hook 11 to push away from the slot. This allows the hook head 112 to slide into the next slot step by step, thus realizing the upward movement of the hook in the insertion slot 10. When the hook stops moving, the hook head 112 is placed in the corresponding slot at that position, fixing the hook in that position.

[0037] The plug groove 10 has guide slides 12 running vertically through both sides. The guide slides 12 extend out of the plug groove 10. The connecting part has a sliding part that is adapted to the guide slides 12. When the hook moves in the plug groove 10, the sliding part slides along the guide slides 12.

[0038] Because fish tanks come in different shapes, their upper sidewalls also vary, requiring hook-and-loop connectors with corresponding matching connectors. This product's connectors can be pulled out of the slot, allowing for the replacement of connectors with different structures to match fish tank shapes. For example... Figure 8 The square fish tank 200 has a flat upper side wall. The second bracket 2 is suitable for the square fish tank 2. The filter body is hung on the square fish tank 200 through the second bracket 2. Figure 9 The irregularly shaped fish tank 300 has an inverted L-shaped cross-section at the upper end of its side wall. The hanger-3 is suitable for this type of irregularly shaped fish tank. The filter body 1 is hung on the irregularly shaped fish tank 200 through the hanger-3.

[0039] The positioning slots on hook-and-loop fasteners with different head structures are all the same.

[0040] In this embodiment, the mounting bracket 3 is suitable for irregularly shaped fish tanks with an inverted L-shaped cross-section at the upper side wall, such as... Figure 1 , 6 As shown, the hook-on portion 32 of the first hook-on component 3 has an "L"-shaped snap hook 321 and an abutment wall 322 facing downwards. In this embodiment, there are two abutment walls 322, which are spaced apart from the snap hook 321. The connecting portion 31 of the first hook-on component 3 has a slot 311 for positioning and engaging with the long arm hook. The slot 311 is composed of two adjacent and spaced-apart clips 312. The clips 312 are toothed structures with a triangular cross-section, including an upper inclined abutment surface that can engage with the lower inclined sliding surface 1122 and a lower inclined abutment surface that can engage with the upper inclined sliding surface 1121. Insert the first hook part 3 into the insertion slot 10 from top to bottom. When the first hook part 3 is moved from top to bottom in the insertion slot 10 by hand, the downward inclined contact surface of the locking strip 312 applies force from top to bottom to the upward inclined sliding surface 1121 of the hook head 112, causing the long arm hook 11 to push away from the slot 311, thereby causing the hook head 112 to slide into the next level slot 311 step by step, realizing the downward movement of the first hook part 3 in the insertion slot 10. When the first hook part 3 stops moving, the hook head 112 is placed in the slot 311 corresponding to it at this time, fixing the first hook part 3 in this position. When it is necessary to lift or remove the hook part 3, force is applied by hand to move the hook part 3 from bottom to top in the insertion slot 10. The upward inclined contact surface of the locking strip 312 applies force from bottom to top to the downward inclined sliding surface 1122 of the hook head 112, causing the long arm hook 11 to push away from the slot 311. This allows the hook head 112 to slide into the next level slot 311, realizing the upward movement of the hook part 3 in the insertion slot 10. When the hook part 3 stops moving, the hook head 112 is placed in the slot 311 corresponding to it at this time, fixing the hook part 3 in that position.

[0041] like Figure 9As shown, the hanger 3 is attached to the irregularly shaped fish tank 300, whose upper edge cross-section is an inverted L-shape. The "L"-shaped hook 321 of the hanger 3 is hooked onto the upper outer edge of the irregularly shaped fish tank 300, and the abutment wall 322 is attached to the upper inner wall of the irregularly shaped fish tank 300. The hanger 3 is fixed to the opening of the irregularly shaped fish tank. The filter body 1 and the hanger 3 can move up and down relative to each other, thereby adjusting the height of the filter body 1 inside the fish tank.

[0042] In this embodiment, the second mounting bracket 2 is suitable for fish tanks with flat side walls, such as... Figure 1 , 2 As shown in Figure 7, the hook-on portion 22 of the second hook-on component 2 has an inner abutment wall 222 and an outer abutment wall 221 facing downwards. The inner abutment wall 222 and the outer abutment wall 221 are spaced apart from each other, and the gap between the inner abutment wall 222 and the outer abutment wall 221 is used to clamp the flat side wall of the aquarium. To accommodate aquariums with side walls of different thicknesses, the inner abutment wall has a stepped structure 223. The stepped structure 223 faces the outer abutment wall 221, and the distance between the stepped structure 223 and the outer abutment wall 221 gradually decreases from bottom to top to accommodate aquarium side walls of different thicknesses. In this embodiment, the stepped structure 223 has three steps, suitable for fixing to aquarium side walls with a thickness of 2.5-6m. The distance between the lower step and the outer abutment wall 221 is the largest, suitable for aquarium side walls with a larger thickness; the distance between the top step and the outer abutment wall 221 is the smallest, suitable for aquarium side walls with a smaller thickness.

[0043] The connecting part 21 of the second hook is provided with a slot 211 for positioning and engaging with the long arm hook 11. The slot 211 is composed of two adjacent spaced-apart clips. The clips are toothed structures with a triangular cross-section, including an upper inclined abutment surface that can engage with the lower inclined sliding surface 1122 and a lower inclined abutment surface that can engage with the upper inclined sliding surface 1121. Insert the second hook 2 into the insertion slot 10 from top to bottom. When the second hook 2 is moved from top to bottom in the insertion slot 10 by hand, the downward inclined contact surface of the locking strip applies force from top to bottom to the upward inclined sliding surface 1121 of the hook head 112, causing the long arm hook 11 to push away from the slot 211, thereby causing the hook head 112 to slide into the slot 211 of the next level step by step, realizing the downward movement of the second hook 2 in the insertion slot 10. When the second hook 2 stops moving, the hook head 112 is placed in the slot 211 corresponding to it at this time, so that the second hook 2 is fixed in this position. When it is necessary to lift or remove the second hook part 2, force is applied by hand to move the second hook part 2 from bottom to top in the insertion groove 10. The upward inclined contact surface of the locking strip applies force from bottom to top to the downward inclined sliding surface 1122 of the hook head 112, causing the long arm hook 11 to push away from the slot 211, thereby causing the hook head 112 to slide into the next level slot 211 step by step, realizing the upward movement of the second hook part 2 in the insertion groove 10. When the second hook part 2 stops moving, the hook head 112 is placed in the slot 211 corresponding to it at this time, so that the second hook part 2 is fixed in this position.

[0044] like Figure 8 As shown, the second mounting bracket 2 is attached to a square fish tank 200 with flat side walls. The side walls of the square fish tank 200 are held between the top step of the inner abutment wall 222 and the outer abutment wall 221. The filter body 1 and the second mounting bracket 2 can move up and down relative to each other, thereby adjusting the height of the filter body 1 inside the fish tank.

[0045] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A hanging built-in filter, comprising a filter body and a hanging structure, characterized in that, The mounting structure includes a vertically arranged insertion slot on the side wall of the filter body and a mounting member that is movably inserted into the insertion slot. The mounting member includes a vertically arranged connecting part and a horizontally arranged upper part for hanging with the fish tank. The connecting part is vertically inserted into the insertion slot and can move vertically within the insertion slot to replace the mounting member or adjust its height. A positioning structure is provided between the connecting part and the insertion slot. The mounting members with different structures of mounting members can be used to match fish tanks of different shapes.

2. The wall-mounted built-in filter according to claim 1, characterized in that, The positioning structure includes multiple slots arranged horizontally and vertically in sequence, and a long hook arm. The long hook arm includes a vertically arranged, elastically pressable lever arm and a hook head located at the lower end of the lever arm. The hook head engages with the slot. The hook head has an upwardly inclined sliding surface on its upper side facing the slot, tilting from bottom to top and away from the slot. The hook head also has a downwardly inclined sliding surface on its lower side facing the slot, tilting from top to bottom and away from the slot. The upwardly inclined sliding surface is located above the downwardly inclined sliding surface. The card slot is composed of two adjacent spaced-apart card strips. When the hook member moves from top to bottom in the insertion slot, the card strips apply force from top to bottom to the upper inclined sliding surface, causing the long arm hook to push away from the card slot, thereby causing the hook head to slide into the card slot of the next level step by step. When the hook member moves from bottom to top in the insertion slot, the card strips apply force from bottom to top to the lower inclined sliding surface, causing the long arm hook to push away from the card slot, thereby causing the hook head to slide into the card slot of the next level step by step.

3. The wall-mounted built-in filter according to claim 2, characterized in that, The card strip has a triangular cross-section and includes an upper inclined abutment surface that can engage with the lower inclined sliding surface and a lower inclined abutment surface that can engage with the upper inclined sliding surface.

4. The hanging built-in filter according to claim 2 or 3, characterized in that, The slot is located on the front side of the connector, and the long arm hook is located in the hollow area of ​​the side wall opposite to the slot of the insertion groove.

5. The wall-mounted built-in filter according to claim 4, characterized in that, A guide slide is vertically provided in the insertion slot, and the guide slide extends out of the insertion slot. The connecting part has a sliding part adapted to the guide slide. When the hook moves in the insertion slot, the sliding part slides along the guide slide.

6. The hanging built-in filter according to claim 1, 2, or 3, characterized in that, The hook-and-loop connector is provided with an "L"-shaped snap hook and an abutment wall facing downwards, with the abutment wall and the snap hook being spaced apart from each other.

7. The hanging built-in filter according to claim 1, 2, or 3, characterized in that, The hook-and-hold joint has an inner abutment wall and an outer abutment wall facing downwards. The inner abutment wall and the outer abutment wall are spaced apart from each other. The inner abutment wall has a stepped structure facing the outer abutment wall, and the distance between the stepped structure and the outer abutment wall gradually decreases from bottom to top.

8. The hanging built-in filter according to claim 1, 2, or 3, characterized in that, The hook-on component is provided in two types: hook-on component one and hook-on component two. Hook-on component one has an "L"-shaped snap hook and an abutment wall facing downwards at the hook-on end, with the abutment wall and the snap hook being spaced apart from each other. Hook-on component two has an inner abutment wall and an outer abutment wall facing downwards at the hook-on end, with the inner abutment wall and the outer abutment wall being spaced apart from each other. The inner abutment wall has a stepped structure, which faces the outer abutment wall, and the distance between the stepped structure and the outer abutment wall gradually decreases from bottom to top.

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