Filter of one-piece construction

Abstract

The utility model relates to a filter of integrated structure, including filter shell, the filter screen of setting in the inside of filter shell, one end of filter shell is integrative connection has filter lower end cover, the filter lower end cover can export water in the inside of filter shell to outside, the waterway of another end of filter shell is connected in outside, the integrated forming process of filter shell and filter lower end cover makes stress distribution more uniform, and the compression resistance improves, reduces assembly procedure, especially applicable to batch production scene, avoids the sealing failure of thread wear, prolongs the life.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, specifically to a filter with an integrated structure. Background Technology

[0002] A pre-filter for a washing machine can filter out large particles such as sediment, rust, insect eggs, and red worms from tap water. Pre-filters are generally installed at the beginning of the pipe, hence the name "pre-filter," while "filtration" refers to the basic principle behind this type of equipment. The filter's mesh size varies from 5 to 300 microns depending on the brand and model. It primarily removes sediment, bacteria, microbial debris, rust, sand, and other particles larger than 5 microns from pipes, preventing harm to humans and skin. It also provides positive protection for downstream pipes, water purifiers, water heaters, washing machines, high-end faucets, and showerheads. Pre-filters can also include a "hydrochloric acid polyphosphate" scale inhibitor filter to prevent scale buildup in solar water heaters and water dispensers. Application announcement number CN117298695A discloses a self-cleaning microplastic filter device. According to its instruction manual and drawings, the device includes a filter body, a filter top cover that is snap-fitted to the upper end of the filter body, and a filter bottom cover that is threaded to the lower end of the filter body.

[0003] However, the solution has certain limitations: 1. Since the filter cover and filter body are detachable, a separate assembly process is required, which reduces the production speed; 2. If there are errors in the installation process between the filter cover and filter body, it is easy to cause subsequent water leakage problems, and the pressure resistance of the entire filter device will change. Summary of the Invention

[0004] This invention addresses the problems existing in the assembly and structure of filters by proposing an integrated filter structure. The one-piece molding process of the filter housing and the lower end cover makes the stress distribution more uniform and improves the pressure resistance; it also reduces assembly steps and avoids sealing failure caused by thread wear.

[0005] The objective of this invention is achieved through the following technical solution: a filter with an integrated structure, including a filter housing, a filter screen disposed inside the filter housing, a filter lower end cover integrally connected to one end of the filter housing, the filter lower end cover being able to discharge water inside the filter housing to the outside, and the other end of the filter housing being connected to an external water passage.

[0006] Preferably, the other end of the filter housing is detachably connected to a filter top cover, and one end of the filter top cover has a first threaded groove inside.

[0007] Preferably, the end of the filter housing is provided with a first threaded boss, and the other end of the filter upper cover is provided with a second threaded groove adapted to the first threaded boss.

[0008] Preferably, the side wall of the lower end cover of the filter is provided with several annular support plates, and a first anti-slip protrusion is provided between adjacent annular support plates to increase friction.

[0009] Preferably, the bottom of the filter's lower end cover is provided with a columnar outlet, and the surface of the columnar outlet is provided with an annular groove adapted to be snapped into external pipes or connectors. The annular groove optimizes the sealing performance, reduces the risk of leakage and maintains the stability of system pressure after the plug-in assembly is completed.

[0010] Preferably, the filter housing has a first annular protrusion and a second annular protrusion inside, and the gap between the first annular protrusion and the second annular protrusion is used to hold the end of the filter screen.

[0011] Preferably, the interior of the second annular protrusion is hollow and is used to house a one-way valve. The interior of the second annular protrusion is connected to the columnar outlet. The one-way valve blocks the backflow of water into the filter housing through an internal valve core spring mechanism, thus maintaining stable pressure.

[0012] Preferably, the side wall of the filter upper cover is provided with several second anti-slip protrusions, and the interior of the filter upper cover is provided with an annular support plate. The design of the annular support plate allows the connector to abut against the annular support plate after being connected to the inner groove of the first thread, thereby limiting the installation position.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. Eliminates the micro-gaps caused by threaded connections in the traditional split structure of filter housing and filter bottom cover, fundamentally eliminating the risk of leakage, and the absence of connection gaps prevents the growth of microorganisms; 2. The one-piece molding process of the filter housing and the lower end cover of the filter makes the stress distribution more uniform and improves the compressive strength; it reduces the assembly process and is especially suitable for mass production scenarios; it avoids sealing failure caused by thread wear and extends the service life. 3. The one-piece molding process of the filter housing and the lower end cover of the filter meets the filtration requirements of different scenarios; it saves the axial space occupied by traditional end covers, reducing the overall volume; it reduces the use of auxiliary parts such as sealing rings, thus reducing the material cost per piece. Attached Figure Description

[0014] Figure 1 This is a perspective view of the present utility model; Figure 2 This is a cross-sectional view of the present invention; Figure 3 This is an exploded cross-sectional view of the present invention; Figure 4 This is a perspective view of the present invention.

[0015] The markings in the diagram are: 1. Filter housing; 11. First threaded boss; 12. First annular protrusion; 13. Second annular protrusion; 2. Filter screen; 3. Filter lower end cover; 31. Annular support plate; 32. First anti-slip boss; 33. Columnar outlet; 34. Annular groove; 4. Filter upper end cover; 41. First threaded inner groove; 42. Second threaded inner groove; 43. Second anti-slip boss; 44. Annular support plate. Detailed Implementation

[0016] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: like Figure 1 , Figure 2 and Figure 4 As shown, a filter with an integrated structure includes a filter housing 1. One end of the filter housing 1 is integrally connected to a lower filter cover 3, which allows water inside the filter housing 1 to be discharged to the outside. The other end of the filter housing 1 is connected to an external water passage. The bottom of the lower filter cover 3 is provided with a columnar water outlet 33, and the surface of the columnar water outlet 33 is provided with an annular groove 34 adapted to be snapped into an external pipe or connector.

[0017] The integrated design of the filter housing 1 and the lower end cover 3 is achieved through injection molding. Furthermore, both the filter housing 1 and the lower end cover 3 can be manufactured in transparent or opaque forms depending on requirements. This design offers numerous advantages: it eliminates the micro-gaps caused by threaded connections in the traditional separate structure of the filter housing 1 and the lower end cover 3, fundamentally preventing leakage risks; the integrated molding process ensures more uniform stress distribution and improved pressure resistance; it reduces assembly steps, making it particularly suitable for mass production; it avoids sealing failures caused by thread wear, extending service life; the absence of seams prevents microbial growth, meeting the filtration requirements of different scenarios; it saves axial space occupied by traditional end covers, reducing the overall volume; and it reduces the use of auxiliary components such as sealing rings, lowering the material cost per unit.

[0018] The annular groove 34 on the surface of the columnar outlet 33 significantly improves the installation efficiency and ease of operation of the entire filter body 1. Users can directly and quickly snap external pipes or connectors onto the columnar outlet 33 without the need for auxiliary tools. This groove structure ensures the stability of the interface through mechanical interlocking, effectively preventing accidental detachment caused by water flow impact or vibration, and ensuring the long-term reliability of the connection.

[0019] The annular groove 34 optimizes sealing performance, reducing leakage risk and maintaining system pressure stability after plug-in assembly. Simultaneously, the quick-connect design of the entire filter to external components supports modular maintenance, simplifies filter replacement, and enhances filter adaptability, making it suitable for environments with pulsating water flow, such as washing machine inlets.

[0020] Please continue to refer to this. Figure 3 The filter housing 1 is provided with a filter screen 2 inside. The filter housing 1 is provided with a first annular protrusion 12 and a second annular protrusion 13 inside. The gap between the first annular protrusion 12 and the second annular protrusion 13 is used to hold the end of the filter screen 2.

[0021] Filter 2 can intercept large particles of impurities in the water, such as sediment, rust, and insect eggs, preventing these impurities from entering the washing machine and causing wear or blockage, thus extending the washing machine's lifespan. Filter 2 can remove suspended solids from the water, reducing harmful substances such as scale and rust, indirectly improving the safety of washing water.

[0022] In this embodiment, a filter upper cover 4 is detachably connected to the other end of the filter housing 1. One end of the filter upper cover 4 has a first threaded groove 41 inside. The end of the filter housing 1 has a first threaded boss 11, and the other end of the filter upper cover 4 has a second threaded groove 42 adapted to the first threaded boss 11 inside.

[0023] In this embodiment, the side wall of the lower end cover 3 of the filter is provided with several annular support plates 31, and a first anti-slip protrusion 32 for increasing friction is provided between adjacent annular support plates 31. The side wall of the upper end cover 4 of the filter is provided with several second anti-slip protrusions 43, and an annular support plate 44 is provided inside the upper end cover 4 of the filter.

[0024] The process of assembling and disassembling the filter upper cover 4 from the filter housing 1 is achieved through the engagement between the first threaded boss 11 at the end of the filter housing 1 and the second threaded inner groove 42 of the filter upper cover 4. During the assembly and disassembly process, the first anti-slip boss 32 and the second anti-slip boss 43 can increase the friction, thereby facilitating assembly and disassembly. The first threaded inner groove 41 is mainly used to connect to the external water source, so that the water entering the washing machine will first pass through the filter screen 2 for filtration.

[0025] In this embodiment, the interior of the second annular protrusion 13 is hollow and is used to house the one-way valve 5. The interior of the second annular protrusion 13 is connected to the columnar outlet 33. The one-way valve 5 uses an internal valve core spring mechanism to prevent water from flowing back into the filter housing 1, maintaining stable pressure and preventing backflow of impurities due to the siphon effect.

[0026] Working principle and usage of this utility model: Connect the first threaded groove 41 of the filter's upper cover 4 to an external water source. The user can directly snap the pipes or connectors on the washing machine onto the columnar water outlet 33, so that the water entering the washing machine will first be filtered through the filter screen 2 inside the filter housing 1. The filter screen 2 can intercept large particles of impurities in the water, such as mud, rust, and insect eggs, preventing these impurities from entering the washing machine and causing wear or blockage, thus extending the washing machine's service life.

[0027] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A filter with an integrated structure, comprising a filter housing (1) and a filter screen (2) disposed inside the filter housing (1), characterized in that, One end of the filter housing (1) is integrally connected to the lower end cover (3), which can discharge the water inside the filter housing (1) to the outside. The other end of the filter housing (1) is connected to the external water passage.

2. The filter with an integrated structure according to claim 1, characterized in that, The filter housing (1) is detachably connected to a filter top cover (4), and a first threaded groove (41) is provided inside one end of the filter top cover (4).

3. The filter with an integrated structure according to claim 2, characterized in that, The filter housing (1) has a first threaded boss (11) at one end, and the filter upper cover (4) has a second threaded groove (42) inside the other end that is adapted to the first threaded boss (11).

4. The filter with an integrated structure according to claim 1, characterized in that, The side wall of the lower end cover (3) of the filter is provided with several annular support plates (31), and a first anti-slip protrusion (32) is provided between adjacent annular support plates (31) to increase friction.

5. The filter with an integrated structure according to claim 4, characterized in that, The bottom of the filter lower end cover (3) is provided with a columnar water outlet (33), and the surface of the columnar water outlet (33) is provided with an annular groove (34) adapted to be snapped into external pipes or connectors.

6. The filter with an integrated structure according to claim 5, characterized in that, The filter housing (1) has a first annular protrusion (12) and a second annular protrusion (13) inside, and the gap between the first annular protrusion (12) and the second annular protrusion (13) is used to hold the end of the filter screen (2).

7. The filter with an integrated structure according to claim 6, characterized in that, The interior of the second annular protrusion (13) is hollow and the interior of the second annular protrusion (13) is used to house the one-way valve (5). The interior of the second annular protrusion (13) is connected to the columnar outlet (33).

8. The filter with an integrated structure according to claim 3, characterized in that, The filter upper cover (4) has several second anti-slip protrusions (43) on its side wall, and the filter upper cover (4) has an annular support plate (44) inside.

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