A filter cartridge

Abstract

The utility model discloses a filter core, including the shell, its inside solid setting has the central tube and spiral flow guide plate, the central tube is along the axis of shell and is arranged, and the water outlet cavity is formed in the central tube, and the lateral wall of water outlet cavity is equipped with a plurality of water passing holes along the circumference, and the spiral flow guide plate is connected between the outer wall of central tube and the inner wall of shell, and spiral flow guide plate extends along the axis direction of shell spiral, to make the outer wall of central tube, the inner wall of shell and the spiral flow guide plate between the spiral cavity way, and the lower extreme of shell is equipped with a plurality of water inlet holes, and spiral cavity way is connected with water inlet hole and water passing hole, and the top of shell is equipped with the water outlet. The utility model discloses the spiral cavity way of forming spiral flow guide plate, and the spiral cavity way of long path must be flowed along to the water outlet from water inlet hole by forced water flow, and the water flow can fully contact with the filter material in the spiral cavity way, can greatly improve the effective contact area of water and filter material under the prerequisite of not increasing the shell volume, and the water quality of water outlet is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and in particular to a filter element. Background Technology

[0002] Currently, most common air purifier filter cartridges on the market are simple straight-through type cartridges. They use a direct filling of functional filter media particles to perform filtration, aiming to make bath water more hygienic and healthy. However, straight-through type cartridges have the following drawbacks: when water flows through the filter media bed, it spontaneously seeks the path of least resistance. This results in a large amount of water passing directly through the gaps between the filter media and the inner wall of the filter housing without sufficient contact with the media. Some areas of the filter media inside the housing cannot effectively reach the water and therefore cannot function properly. The consumption rate of the filter media varies across different areas within the filter housing, leading to uneven and unmaximized filter cartridge lifespan, resulting in media waste and low actual utilization. Especially under high-flow conditions in bathrooms, it is difficult to guarantee that the performance of the filter media will meet user needs. Utility Model Content

[0003] The present invention aims to at least partially solve one of the aforementioned technical problems in the related art. Therefore, the present invention proposes a filter element.

[0004] To achieve the above objectives, the technical solution of this utility model is as follows:

[0005] According to an embodiment of the present invention, a filter element includes a housing, inside which a central tube and a spiral guide plate are fixedly disposed. The central tube is arranged along the axis of the housing, and a water outlet cavity is formed inside the central tube, with the water outlet cavity located at the upper end of the central tube. The side wall of the water outlet cavity is provided with a plurality of water passage holes along the circumferential direction. The spiral guide plate is connected between the outer wall of the central tube and the inner wall of the housing, and the spiral guide plate extends spirally along the axis of the housing, so that the outer wall of the central tube, the inner wall of the housing, and the spiral guide plate form a spiral channel. The spiral channel is filled with filter media. The lower end of the housing is provided with a plurality of water inlet holes, and the spiral channel communicates with the water inlet holes and water passage holes. The top of the housing is provided with a water outlet, which communicates with the water outlet cavity.

[0006] The filter element according to the embodiment of this utility model has at least the following beneficial effects:

[0007] 1. This utility model utilizes a spiral guide plate to form a spiral cavity, in which filter media is uniformly filled. This forces the water flow from the inlet to the outlet to follow the long path of the spiral cavity, ensuring sufficient contact between the water flow and the filter media within the spiral cavity. Without increasing the volume of the outer shell, it can significantly increase the effective contact area between the water and the filter media. For reactive functional filter media, it can improve the effective reaction time; for leaching and releasing functional filter media, it can improve the effective contact time. The filter media has a high utilization rate, and the effluent water quality is stable and reliable.

[0008] 2. Water flow within the spiral cavity gathers from the water passages into the outlet chamber, and then flows out from the outlet. The water passages must prevent filter media from entering the outlet chamber while ensuring sufficient water flow; therefore, numerous small-diameter water passages are required. The sidewalls of the outlet chamber are three-dimensional circumferential walls, providing ample area for these water passages. Furthermore, the outlet chamber is formed within the central tube, without occupying additional internal space, maximizing the filling space for the filter media.

[0009] According to some embodiments of the present invention, the outer shell includes a main cylinder, an upper end cover, and a lower end cover. The upper and lower ends of the main cylinder are both open. The central tube and the spiral guide plate are disposed inside the main cylinder. The lower end cover seals the open end of the lower end of the main cylinder, and the upper end cover seals the open end of the upper end of the main cylinder. The water outlet is disposed on the upper end cover.

[0010] According to some embodiments of the present invention, a threaded connector is fixedly provided on the upper surface of the upper end cover. The threaded connector is annular and coaxially arranged with the water outlet. The outer peripheral wall of the threaded connector is provided with external threads.

[0011] According to some embodiments of the present invention, the water inlet is provided on the side wall of the main cylinder, and the water inlet is distributed along the circumference of the main cylinder.

[0012] According to some embodiments of this utility model, the water inlet is provided on the side wall of the main cylinder, and the ratio of the total area S1 of all the water inlets to the area S2 of the side wall of the main cylinder, S1 / S2, is 1%-2%.

[0013] According to some embodiments of the present invention, the ratio of the total area S3 of all the water passage holes to the total area S1 of all the water inlet holes, S3 / S1, is ≥10%.

[0014] According to some embodiments of the present invention, at least three spiral guide plates are provided, and all the spiral guide plates are arranged in parallel to each other to form at least three spiral cavities.

[0015] According to some embodiments of this utility model, the main cylinder is cylindrical, and the ratio of its axial length L to its inner diameter d1, L / d1, is 4-8.

[0016] According to some embodiments of this utility model, the ratio d2 / d1 of the diameter d2 of the central tube to the inner diameter d1 of the main cylinder is 0.3-0.5.

[0017] According to some embodiments of the present invention, a filter screen is also included, which is sleeved on the outer peripheral wall of the outer shell, covers the water inlet hole, and the pore size of the filter screen is smaller than the particle size of the filter material.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0020] Figure 1 This is an exploded view of the filter element of this utility model;

[0021] Figure 2 This is a cross-sectional view of the filter element of this utility model;

[0022] Figure 3 This is a cross-sectional view of the main cylinder of this utility model.

[0023] Reference numerals: Main cylinder 110, water inlet 111, upper end cover 120, water outlet 121, threaded joint 122, lower end cover 130, central tube 200, water outlet cavity 210, water passage 211, spiral guide plate 300, spiral cavity 310. Detailed Implementation

[0024] 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 denote 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.

[0025] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, 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. Therefore, they should not be construed as limitations on this utility model.

[0026] Reference Figure 1-2A filter element includes a cylindrical outer shell, inside which a central tube 200 and a spiral guide plate 300 are fixed. The central tube 200 is arranged along the axis of the outer shell, and a water outlet cavity 210 is formed inside the central tube 200. The water outlet cavity 210 is located at the upper end of the central tube 200. The side wall of the water outlet cavity 210 is provided with a plurality of water passage holes 211 along the circumferential direction. The spiral guide plate 300 is connected between the outer wall of the central tube 200 and the inner wall of the outer shell, and the spiral guide plate 300 extends spirally along the axis of the outer shell so that the outer wall of the central tube 200, the inner wall of the outer shell, and the spiral guide plate 300 form a spiral cavity 310. The spiral cavity 310 is filled with filter media. The lower end of the outer shell is provided with a plurality of water inlet holes 111. The spiral cavity 310 communicates with the water inlet holes 111 and the water passage holes 211. The top of the outer shell is provided with a water outlet 121, which communicates with the water outlet cavity 210. Water inlets 211 are evenly distributed at the upper end of the central tube 200, and water outlets 111 are evenly distributed at the lower end of the outer shell. Water enters through the water outlets 111 and flows upward along a spiral path, eventually passing through the water inlets 211 and entering the outlet chamber 210 to collect and exit the water. This extends the water flow path, allowing the water to fully contact the filter media within the spiral channel. Without increasing the volume of the outer shell, the effective contact area between water and filter media is significantly increased, resulting in high utilization of the filter media and stable and reliable effluent quality. The inner and outer edges of the spiral guide plate 300 are sealed to the outer wall of the central tube 200 and the inner wall of the outer shell through interference fit or bonding, respectively. This prevents water from directly passing through the gaps between the spiral guide plate 300 and the inner wall of the outer shell or between the spiral guide plate 300 and the outer wall of the central tube 200, thus preventing short-circuiting and forcing the water to flow along the long spiral channel.

[0027] In some embodiments of this utility model, the outer shell includes a main cylinder 110, an upper end cover 120, and a lower end cover 130. Both the upper and lower ends of the main cylinder 110 are open. A central tube 200 and a spiral guide plate 300 are disposed inside the main cylinder 110. The lower end cover 130 seals the lower end opening of the main cylinder 110, and the upper end cover 120 seals the upper end opening of the main cylinder 110. An outlet 121 is located on the upper end cover 120. The upper end cover 120 and the lower end cover 130 can be sealed to the main cylinder 110 by snap-fit ​​or welding. During assembly, filter media is inserted through either the upper or lower end opening of the main cylinder 110, and then the upper end cover 120 is sealed.

[0028] In some embodiments of this utility model, a threaded connector 122 is fixedly provided on the upper surface of the upper end cover 120. The threaded connector 122 is annular and coaxially arranged with the water outlet 121. The outer peripheral wall of the threaded connector 122 is provided with external threads. The threaded connector 122 is the connection interface between the filter element and external equipment. The two are fixed by thread engagement, and the detachable design of the threaded connector 122 facilitates the replacement of the filter element.

[0029] In some embodiments of this utility model, the water inlet hole 111 is provided on the side wall of the main cylinder 110, and the water inlet hole 111 is distributed along the circumference of the main cylinder 110, so that the water flow can enter the spiral cavity 310 synchronously and evenly from the circumference of the side wall of the main cylinder 110.

[0030] In some embodiments of this utility model, the water inlet hole 111 is provided on the side wall of the main cylinder 110, and the ratio of the total area S1 of all water inlets 111 to the area S2 of the side wall of the main cylinder 110, S1 / S2, is 1%-2%. This ratio can well balance the inlet flow rate and the outlet flow rate, reduce the filter element pressure, and reduce the flow rate attenuation rate.

[0031] In some embodiments of this utility model, the ratio of the total area S3 of all water passage holes 211 to the total area S1 of all water inlet holes 111, S3 / S1, is ≥10%. This ensures that the water flow has enough time to contact the filter media and that the drainage capacity of the water passage holes 211 is sufficient to match the water inlet capacity of the water inlet holes 111. This prevents abnormal pressure rise in the spiral cavity 310 and maintains the normal flow state of the water in the spiral cavity 310.

[0032] In some embodiments of this utility model, at least three spiral guide plates 300 are provided, and all spiral guide plates 300 are arranged parallel to each other to form at least three spiral channels 310. Multiple spiral guide plates 300 divide the internal space of the outer shell into multiple independent spiral channels 310, further increasing the actual contact area between the water flow and the filter media.

[0033] In some embodiments of this utility model, reference is made to Figure 3 The main body 110 is cylindrical, and the ratio of its axial length L to its inner diameter d1, L / d1, is 4-8. Under the same volume, the slender cylindrical structure of the outer shell can extend the water flow path.

[0034] In some embodiments of this utility model, the ratio d2 / d1 of the diameter d2 of the central tube 200 to the inner diameter d1 of the main cylinder 110 is 0.3-0.5, which takes into account both the strength of the central tube 200 and the smoothness of water flow.

[0035] In some embodiments of this utility model, a filter screen (not shown in the drawings) is also included. The filter screen is fitted onto the outer peripheral wall of the housing and covers the water inlet hole 111. The pore size of the filter screen is smaller than the particle size of the filter media. For some filter media that are too small, the filter screen can prevent the filter media from falling out of the water inlet hole 111. The pore size of the filter screen depends on the size of the filter media.

[0036] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A filter element, characterized in that, The device includes an outer shell, inside which a central tube (200) and a spiral guide plate (300) are fixed. The central tube (200) is arranged along the axis of the outer shell, and a water outlet cavity (210) is formed inside the central tube (200). The water outlet cavity (210) is located at the upper end of the central tube (200). The sidewall of the water outlet cavity (210) is provided with a plurality of water passage holes (211) along the circumferential direction. The spiral guide plate (300) is connected between the outer wall of the central tube (200) and the inner wall of the outer shell, and the spiral guide plate (300) is... 0) The outer wall of the central tube (200), the inner wall of the outer shell, and the spiral guide plate (300) form a spiral cavity (310). The spiral cavity (310) is filled with filter media. The lower end of the outer shell is provided with several water inlet holes (111). The spiral cavity (310) is connected to the water inlet holes (111) and the water passage holes (211). The top of the outer shell is provided with a water outlet (121). The water outlet (121) is connected to the water outlet cavity (210).

2. The filter cartridge of claim 1, wherein, The outer shell includes a main cylinder (110), an upper end cover (120), and a lower end cover (130). The upper and lower ends of the main cylinder (110) are open. The central tube (200) and the spiral guide plate (300) are disposed inside the main cylinder (110). The lower end cover (130) seals the lower end of the main cylinder (110), and the upper end cover (120) seals the upper end of the main cylinder (110). The water outlet (121) is located on the upper end cover (120).

3. The filter element according to claim 2, characterized in that, The upper surface of the upper end cover (120) is fixed with a threaded connector (122). The threaded connector (122) is annular and coaxially arranged with the water outlet (121). The outer peripheral wall of the threaded connector (122) is provided with external threads.

4. The filter cartridge of claim 2, wherein, The water inlet (111) is located on the side wall of the main cylinder (110), and the water inlet (111) is distributed along the circumference of the main cylinder (110).

5. The filter cartridge of claim 2 wherein, The water inlet (111) is located on the side wall of the main cylinder (110), and the ratio of the total area S1 of all the water inlets (111) to the area S2 of the side wall of the main cylinder (110) is 1%-2%.

6. The filter cartridge of claim 5, wherein, The ratio of the total area S3 of all the water passage holes (211) to the total area S1 of all the water inlet holes (111) is S3 / S1≥10%.

7. The filter cartridge of claim 1 wherein, At least three spiral guide plates (300) are provided, and all the spiral guide plates (300) are arranged in parallel to each other to form at least three spiral cavities (310).

8. The filter cartridge of claim 2, wherein, The main cylinder (110) is cylindrical, and the ratio of its axial length L to its inner diameter d1, L / d1, is 4-8.

9. The filter cartridge of claim 8, wherein, The ratio d2 of the diameter of the central tube (200) to the inner diameter d1 of the main cylinder (110) is 0.3-0.

5.

10. The filter cartridge of claim 1, wherein, It also includes a filter screen, which is fitted onto the outer peripheral wall of the housing and covers the water inlet hole (111). The pore size of the filter screen is smaller than the particle size of the filter media.

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