Filter element

Abstract

The filter element comprises a shell, a water guide pipe and a first filter part, a filter cavity used for containing a filter material is formed in the shell, a water inlet and a water outlet which are communicated with the filter cavity are formed in the bottom of the shell, and a step corresponding to the water inlet in position is arranged at the cavity bottom of the filter cavity in a protruding mode; a through groove communicated with the inner side and the outer side of the step is formed in the step, the first filtering piece is arranged on the inner side of the step, one end of the water guide pipe is connected to the water outlet in a sealed mode, the other end of the water guide pipe extends to the cavity top of the filtering cavity, and a gap is reserved between the water guide pipe and the cavity top and used for containing a filtering material. The through groove is formed in the step at the water inlet, so that the water outlet area of the first filtering piece can be increased, the resistance is reduced, the water inlet efficiency is improved, and the water inlet can be effectively prevented from being blocked.

Description

Technical Field

[0001] This application relates to the technical field of filter elements, and more particularly to a filter element. Background Technology

[0002] In existing fluid filtration devices, traditional filter cartridge structures often employ a single-layer or unidirectional filter media arrangement. This design typically requires fluid to flow in a fixed direction through a linear channel formed by a dense filter layer, subjecting the filter media surface to significant initial impact pressure. Due to the inherent trade-off between fluid flux and filtration accuracy, this type of structure is prone to flux decay during long-term use, manifesting as a significant reduction in processing efficiency per unit time. More critically, limited by the planar arrangement of the filter media, impurity particles easily accumulate locally in the inlet area, causing a continuous reduction in the flow channel cross-sectional area. This not only leads to an abnormal increase in differential pressure parameters but also accelerates the structural fatigue of the filter media. Utility Model Content

[0003] The purpose of this application embodiment is to provide a filter element that, by setting a through groove on the step at the water inlet, can increase the water outlet area of ​​the first filter element, thereby reducing resistance, improving water inlet efficiency, and effectively preventing blockage at the water inlet.

[0004] To achieve the above objectives, this application adopts the following technical solution:

[0005] On one hand, a filter element is provided, comprising: a shell, a water guide pipe, and a first filter element. The shell has a filter chamber for placing filter media inside, and an inlet and an outlet communicating with the filter chamber at the bottom. The bottom of the filter chamber has a step corresponding to the position of the inlet. A through groove communicating with its inner and outer sides is opened on the step. The first filter element is disposed on the inner side of the step. One end of the water guide pipe is sealed and connected to the outlet, and the other end extends to the top of the filter chamber, with a gap reserved between the pipe and the top of the chamber for accommodating the filter media.

[0006] Furthermore, a limiting member for restricting the first filter element is provided on the inner side of the step.

[0007] Furthermore, a second filter element is provided on the inner side of the end of the water guide pipe near the water outlet.

[0008] Furthermore, the outer casing includes a housing and an end cap, the end cap being detachably mounted on the top of the housing, and the inlet and outlet being spaced apart at the bottom of the housing.

[0009] Furthermore, a locking structure is provided at the connection between the housing and the end cap.

[0010] Furthermore, the locking structure includes a first locking buckle disposed on the outer wall of the housing and a second locking buckle disposed on the inner wall of the end cap, wherein the first locking buckle and the second locking buckle cooperate to lock together.

[0011] Furthermore, the locking structure also includes an anti-disengagement buckle disposed on the outer edge of the housing and an anti-disengagement groove disposed on the inner edge of the end cap, wherein the anti-disengagement buckle can be embedded in the anti-disengagement groove.

[0012] Furthermore, a sealing element is provided at the connection between the housing and the end cap.

[0013] Furthermore, a fixing seat is provided on the outer wall surface of the outer casing.

[0014] Furthermore, the bottom of the outer casing is provided with a first connecting post corresponding to the water inlet and a second connecting post corresponding to the water outlet, and the interior of the first connecting post and the second connecting post forms an inlet and outlet channel.

[0015] The beneficial effects of this application are as follows: By creating through channels in the steps, the fluid dynamics limitations of traditional unidirectional filtration structures are overcome. The multi-dimensional flow guiding network formed by the through channels allows the water flow to form a distributed permeation mode on the surface of the first filter element, expanding the original linear flow channel into a three-dimensional flow distribution structure, significantly reducing inlet resistance and increasing the throughput per unit time. At the same time, the through channels can disperse the initial impact of impurities on the surface of the filter media, preventing particulate matter from accumulating at the inlet and significantly delaying the clogging cycle of the first filter element. The gap layout between the water guide pipe and the top of the chamber, combined with the vertical flow guiding characteristics of the filter chamber, further optimizes the utilization efficiency of the filter media layer, achieving a synergistic improvement in high-precision filtration and long-term stable operation while maintaining the compact structure of the device. Attached Figure Description

[0016] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0017] Figure 1 This is a perspective view of the filter element described in the embodiments of this application;

[0018] Figure 2 This is an exploded view of the filter element described in the embodiments of this application;

[0019] Figure 3 This is a schematic diagram of the interior of the housing described in the embodiment of this application;

[0020] Figure 4 This is a perspective view of the end cap described in an embodiment of this application;

[0021] Figure 5 This is a cross-sectional view of the filter element described in the embodiment of this application.

[0022] In the diagram: 1. Outer shell; 101. Shell; 102. End cap; 2. Water guide pipe; 3. First filter element; 4. Limiting element; 5. Second filter element; 6. Locking structure; 601. First locking buckle; 602. Second locking buckle; 603. Anti-disengagement buckle; 604. Anti-disengagement groove; 7. Sealing element; 8. Fixing base; 9. First connecting post; 10. Second connecting post; 11. Water inlet; 12. Water outlet; 13. Step; 14. Through groove; 110. Filter media. Detailed Implementation

[0023] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0024] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0025] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] like Figures 1 to 5As shown, this embodiment provides a filter element, including: a housing 1, a water guide pipe 2, and a first filter element 3. The housing 1 has a filter chamber for placing filter media 110 inside, and an inlet 11 and an outlet 12 communicating with the filter chamber at the bottom. The bottom of the filter chamber has a step 13 corresponding to the position of the inlet 11. A through groove 14 communicating with its inner and outer sides is opened on the step 13. The first filter element 3 is disposed on the inner side of the step 13. One end of the water guide pipe 2 is sealed and connected to the outlet 12, and the other end extends to the top of the filter chamber, with a gap reserved between it and the top of the chamber for accommodating the filter media 110.

[0027] Based on the above scheme, after the water flows into the filtration chamber through the inlet 11, it directly acts on the first filter element 3 set inside the step 13. The step 13, as the core structure of the water inlet channel, has a through-groove 14 on its surface that penetrates the inner and outer walls of the step 13, forming a three-dimensional flow channel surrounding the filter element inlet. When the water flows through the inlet 11, part of the water flows axially directly through the first filter element 3 to complete primary filtration, while the other part flows radially through the lateral opening of the through-groove 14, evenly covering the circumferential surface of the first filter element 3. This design allows the water flow to form a multi-dimensional penetration path when it comes into contact with the filter media, ensuring both efficient passage of the main axial flow and expanding the effective filtration area through the diversion effect of the through-groove 14. The water that has completed primary filtration then enters the filter media 110 layer in the filtration chamber for deep purification, and finally enters the pipe body through the gap at the top of the water guide pipe 2, and is discharged from the outlet 12. The gap design between the water guide pipe 2 and the top of the chamber ensures that the filter media 110 is evenly distributed, avoiding local blockage.

[0028] This solution optimizes the water flow distribution on the filter element surface through a three-dimensional flow-diverting design with steps 13 and channels 14. Channel 14 adds a radial permeation component to the axial mainstream water flow, significantly reducing the water flow impact intensity per unit area, thereby minimizing the risk of instantaneous impurity accumulation on the filter media surface. The synergistic effect of the multi-directional flow channels not only increases the effective outlet area and alleviates the pressure drop problem of traditional unidirectional filtration, but also extends the anti-clogging cycle of the filter element by dispersing water flow impact. Furthermore, the gap between the water guide pipe 2 and the top of the chamber, combined with the vertical filling structure of 110 layers of filter media, ensures the uniformity and stability of secondary filtration, achieving high precision and high flow rate compatibility within a compact space, making it particularly suitable for applications with large water quality fluctuations and high suspended solids concentrations.

[0029] Furthermore, a limiting member 4 is provided on the inner side of the step 13 to restrict the first filter element 3. The limiting member 4, located on the inner side of the step 13, precisely positions the first filter element 3 within a preset working range through mechanical constraint. Its working principle is reflected in the fact that during the water flow impact process, the limiting member 4 and the edge of the first filter element 3 form a three-dimensional contact surface, preventing axial displacement of the filter element due to fluid impact and offsetting radial vibration through the annular support structure. This constraint mechanism ensures that the first filter element 3 always maintains a geometric alignment with the diversion channel of the through-slot 14, allowing the radial water flow from the through-slot 14 to act uniformly on the entire circumference surface of the filter element.

[0030] Furthermore, a second filter element 5 is provided on the inner side of the end of the water guide pipe 2 near the outlet 12. Water treated by the filter media 110 layer must forcefully penetrate the second filter element 5 to complete the final fine filtration after entering the water guide pipe 2. The second filter element 5 forms a flow channel constraint with the inner wall of the water guide pipe 2 through a ring-shaped nested structure, forcing the water flow to diffuse evenly across the entire cross-sectional area of ​​the second filter element 5 during axial flow, avoiding backflow of the filter media 110 due to excessively high local flow velocities. Simultaneously, the fit gap between the second filter element 5 and the inner wall of the water guide pipe 2 constitutes a dynamic pressure buffer layer, which can absorb the impact of water flow pulsations on the filter media 110 layer. This design, through the synergistic effect of a dual filtration mechanism and end-point interception, not only intercepts fine particles that may escape from the front-end filter media 110 but also balances the pressure difference inside and outside the water guide pipe 2. While ensuring the quality of the effluent, it significantly reduces the risk of structural deformation of the filter media 110 layer due to back pressure fluctuations, achieving enhanced stability throughout the entire process from coarse filtration to fine filtration.

[0031] In some embodiments, the housing 1 includes a housing 101 and an end cap 102. The end cap 102 is detachably mounted on the top of the housing 101, and the inlet 11 and the outlet 12 are spaced apart at the bottom of the housing 101. A threaded or snap-fit ​​sealing structure is used at the assembly interface between the end cap 102 and the top of the housing 101, ensuring that the cavity can be separated by only partially releasing the lock during disassembly. The spaced-apart inlet 11 and outlet 12 at the bottom form independent flow channels, allowing unfiltered water and purified water to flow in opposite directions within the housing 101, avoiding the risk of cross-contamination. When the end cap 102 is open, the top of the filter chamber is fully exposed, allowing direct replenishment or replacement of the filter media 110 layer, and facilitating the cleaning of any impurities that may have accumulated in the gaps at the top of the water guide pipe 2.

[0032] Specifically, a locking structure 6 is provided at the connection between the housing 101 and the end cap 102. The locking structure 6 includes a first locking buckle 601 disposed on the outer wall of the housing 101 and a second locking buckle 602 disposed on the inner wall of the end cap 102. The first locking buckle 601 and the second locking buckle 602 cooperate to lock together. The housing 101 and the end cap 102 achieve quick assembly and sealing through the locking structure 6. Its working principle relies on the elastic engagement mechanism of the first locking buckle 601 and the second locking buckle 602. When the end cap 102 is rotated to a preset angle, the second locking buckle 602 on the inner wall of the end cap 102 undergoes radial deformation under the guidance of the inclined surface of the first locking buckle 601 on the outer wall of the housing 101 until the two enter the conjugate groove to complete self-locking. During the locking process, the normal pressure generated by the fastening structure forces the sealing surface of the end cap 102 and the housing 101 to fit tightly together, forming a continuous circumferential sealing band. This design, through the dual effects of elastic deformation and mechanical limiting, ensures a uniform distribution of axial locking force and adapts to thermal expansion and contraction under different working conditions through the self-compensating characteristics of the interlocking structure.

[0033] More specifically, the locking structure 6 further includes an anti-disengagement buckle 603 disposed on the outer edge of the housing 101 and an anti-disengagement groove 604 disposed on the inner edge of the end cap 102, wherein the anti-disengagement buckle 603 can be embedded in the anti-disengagement groove 604. The nested structure of the anti-disengagement buckle 603 and the anti-disengagement groove 604 forms a redundant constraint mechanism for the locking system. When the end cap 102 is rotated to the locked position, the anti-disengagement buckle 603 on the outer edge of the housing 101 slides into the anti-disengagement groove 604 on the inner edge of the end cap 102, forming an axial displacement hard limit through geometric fitting. This structure, based on the elastic engagement of the locking buckle, further prevents the end cap 102 from accidentally rotating out under vibration or pressure fluctuations. The nested structure of the anti-disengagement latch 603 and the anti-disengagement groove 604 can disperse the shear stress borne by the locking latch, avoiding fatigue fracture caused by long-term alternating loads at a single locking point. Simultaneously, the dual locking mechanism ensures that the end cap 102 maintains uniform pressure on the sealing surface under high-pressure conditions, preventing fluid leakage. Furthermore, the directional embedding characteristics of the anti-disengagement latch 603 and the groove assist operators in quickly aligning the assembly reference, reducing the risk of seal failure caused by angular deviations, and significantly improving the structural robustness and maintenance convenience of the filter element under complex operating conditions.

[0034] It is worth mentioning that a sealing element 7 is also provided at the connection between the housing 101 and the end cap 102. The sealing element 7 is embedded at the connection interface between the housing 101 and the end cap 102, and achieves dynamic sealing compensation through elastic deformation. When the end cap 102 is closed by the locking structure 6, the sealing element 7 expands radially under the action of axial clamping force, and its cross-sectional profile simultaneously fills the assembly gap and micro-uneven area between the housing 101 and the end cap 102, forming multiple circumferential sealing barriers. This design combines the rebound characteristics of the elastomeric material with the mechanical pressing effect of the locking structure 6. Under the conditions of thermal expansion and contraction or pressure fluctuation, the sealing element 7 can maintain the stability of the interface contact stress through adaptive deformation, blocking the fluid penetration path along the thread or snap gap. The beneficial effect is that the synergistic effect of the sealing element 7 and the locking structure 6 forms a dual sealing mechanism of "mechanical pressing + elastic compensation", which not only overcomes the high dependence of traditional rigid seals on machining accuracy, but also eliminates the risk of seal failure caused by vibration or temperature changes through material elasticity. In addition, the redundant sealing design of seal 7 can adapt to different media characteristics (such as corrosive fluids), and its wear resistance and anti-aging performance further extend the maintenance-free cycle of the filter element under harsh working conditions, while reducing the overall replacement cost caused by wear of the sealing surface.

[0035] Generally, the outer wall of the outer casing 1 is provided with a fixing seat 8. The array of pre-set screw holes on the surface of the fixing seat 8 and the reinforcing rib structure form a composite bearing surface. When installed vertically, the screw tightening force in the vertical direction forms a shear-resistant support with the bracket. When installed horizontally, the distributed anchoring of the horizontal fixing points resists the fluid impact torque. During installation, the operator can choose the vertical or horizontal mode according to the site space constraints, and use general-purpose screws to pass through the countersunk screw holes of the fixing seat 8 to fasten it to the bracket, so that the outer casing 1 and the external support structure form a rigid connection.

[0036] Meanwhile, the bottom of the outer casing 1 is respectively provided with a first connecting post 9 corresponding to the inlet 11 and a second connecting post 10 corresponding to the outlet 12. Both the first connecting post 9 and the second connecting post 10 have inlet and outlet channels inside. The first connecting post 9 and the second connecting post 10 are integrated into the bottom of the outer casing 1, achieving rapid adaptation of fluid pipelines through a modular interface design. Its working principle is as follows: the inlet and outlet channels of the first connecting post 9 are directly connected to the inlet 11, and the channel of the second connecting post 10 is connected to the outlet 12. The internal flow channels of both adopt a gradually narrowing cross-section optimization, and a guide cone surface is set at the inlet section to reduce turbulence generation. When connecting a connector or hose, the anti-slip threads or grooves on the outer wall of the connecting post form a mechanical lock with the external pipeline. At the same time, the annular sealing groove at its end has a built-in O-ring, generating radial sealing force when axially compressed, preventing interface leakage. This design adapts to pipeline specifications in different engineering scenarios through standardized geometric parameters of the connecting post (such as thread specifications and pipe diameter), allowing the filter element to be connected to the system without additional adapters. The beneficial effects are as follows: the integrated structure of the connecting column avoids the bolt pre-tightening operation of traditional flange connections, reducing installation complexity; the fluid dynamics optimization of the internal flow channel reduces energy loss caused by local eddies, while the anti-detachment interface design ensures connection reliability under high flow rate conditions. In addition, the rigid integrated casting process of the connecting column and the outer shell 1 eliminates the corrosion risk of traditional welded interfaces, and its surface anti-corrosion coating further extends its service life in acidic and alkaline water environments.

[0037] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0038] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0039] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0040] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. A filter element, characterized in that, include: The housing (1), water guide pipe (2), and first filter element (3) are provided. The housing (1) has a filter chamber for placing filter media (110) inside. The bottom is provided with an inlet (11) and an outlet (12) communicating with the filter chamber. The bottom of the filter chamber is provided with a step (13) corresponding to the position of the inlet (11). A through groove (14) communicating with the inside and outside of the step (13) is provided on the step (13). The first filter element (3) is located inside the step (13). One end of the water guide pipe (2) is sealed and connected to the outlet (12), and the other end extends to the top of the filter chamber, with a gap reserved between it and the top of the chamber for accommodating the filter media (110).

2. The filter element according to claim 1, characterized in that, The inner side of the step (13) is provided with a limiting member (4) for restricting the first filter element (3).

3. The filter element according to claim 1, characterized in that, A second filter element (5) is provided on the inner side of the end of the water pipe (2) near the water outlet (12).

4. The filter element according to any one of claims 1-3, characterized in that, The outer casing (1) includes a housing (101) and an end cap (102). The end cap (102) is detachably installed on the top of the housing (101), and the inlet (11) and the outlet (12) are spaced apart at the bottom of the housing (101).

5. The filter element according to claim 4, characterized in that, A locking structure (6) is provided at the connection between the housing (101) and the end cap (102).

6. The filter element according to claim 5, characterized in that, The locking structure (6) includes a first locking buckle (601) disposed on the outer wall of the housing (101) and a second locking buckle (602) disposed on the inner wall of the end cap (102), wherein the first locking buckle (601) and the second locking buckle (602) cooperate to lock together.

7. The filter element according to claim 6, characterized in that, The locking structure (6) further includes an anti-disengagement buckle (603) disposed on the outer edge of the housing (101) and an anti-disengagement groove (604) disposed on the inner edge of the end cap (102), wherein the anti-disengagement buckle (603) can be embedded in the anti-disengagement groove (604).

8. The filter element according to claim 4, characterized in that, A sealing element (7) is also provided at the connection between the housing (101) and the end cap (102).

9. The filter element according to any one of claims 1-3, characterized in that, The outer wall of the outer casing (1) is provided with a fixing seat (8).

10. The filter element according to any one of claims 1-3, characterized in that, The bottom of the outer shell (1) is provided with a first connecting post (9) corresponding to the water inlet (11) and a second connecting post (10) corresponding to the water outlet (12), and the interior of the first connecting post (9) and the second connecting post (10) both form inlet and outlet channels.

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