Composite filter element and purification device

Abstract

The utility model provides a composite filter element and a purification device, the composite filter element comprises: a water collection component having a water collection channel, a water passing hole and an opening, the water passing hole is located in the side wall of the water collection component and communicates with the water collection channel, and the opening communicates with the water collection channel; the front filtering part is arranged on the outer side wall of the water collecting part in a sleeving manner and is communicated with the water passing hole; the rear filtering part is arranged in the water collecting channel; the water outlet connector is inserted into the end, with the opening, of the water collecting channel, covers the opening and is provided with a water outlet flow channel, and the water outlet flow channel communicates with the water collecting channel; the first blocking part is arranged between the rear filtering part and the water outlet connector, covers an opening in the end, close to the water collecting channel, of the water outlet flow channel and is used for blocking the first particulate matter released by the rear filtering part. The rear filtering part is integrated in the water collecting channel in the water collecting part, and the filter element is highly integrated, good in compactness, good in space utilization rate and easy to install under the condition that the overall performance of the filter element is not changed.

Description

Composite filter element and purification device Technical Field

[0001] This application relates to the field of water treatment technology, and in particular to a composite filter element and purification device. Background Technology

[0002] Currently, most composite filter cartridges on the market adopt an integrated design. For filter cartridges containing functional filter media, they mainly include a pre-filter element, a core filter element, and a post-filter element. Among them, the pre-filter element is sleeved on the outer peripheral wall of the core filter element, and the core filter element further purifies the water filtered by the pre-filter element. The post-filter element is installed outside the core filter element. The overall structure is not compact enough and the space utilization rate is low. Summary of the Invention

[0003] This application provides a composite filter element and purification device to solve the problem of low space utilization in related technologies. The technical solution is as follows:

[0004] In a first aspect, embodiments of this application provide a composite filter element, comprising:

[0005] A water collecting component has a water collecting channel, a water passage hole, and an opening. The water collecting channel extends vertically along the water collecting component. The water passage hole is located on the side wall of the water collecting component and communicates with the water collecting channel. The opening is located at the end of the water collecting component and communicates with the water collecting channel.

[0006] A pre-filter component is sleeved on the outer wall of the water collection component, and the pre-filter component is connected to the water passage hole;

[0007] A post-filter component is disposed within the water collection channel;

[0008] A water outlet connector, wherein the water outlet connector is inserted into one end of the water collection channel having the opening, the water outlet connector covers the opening, and the water outlet connector has a water outlet channel communicating with the water collection channel; and

[0009] A first blocking component is disposed between the post-filter component and the water outlet connector. The first blocking component covers the opening of the water outlet channel near the water collection channel. The first blocking component is used to allow the water output by the post-filter component to flow into the water outlet channel. The first blocking component is also used to intercept the first particulate matter released by the post-filter component.

[0010] In one embodiment, the composite filter element further includes:

[0011] The second barrier component is disposed in the water outlet channel. The second barrier component is used to allow the water output by the post-filter component to flow out of the water outlet channel. At the same time, the second barrier component is also used to intercept the second particulate matter released by the post-filter component. The outer diameter of the second particulate matter is smaller than the outer diameter of the first particulate matter.

[0012] In one embodiment, the water outlet channel includes:

[0013] A first water outlet section, the first water outlet section being connected to the water collection channel; and

[0014] The second water outlet section is connected to the first water outlet section. The first water outlet section and the second water outlet section are arranged one after another along the water outlet direction of the water outlet channel. The inner diameter of the second water outlet section is smaller than the inner diameter of the first water outlet section, so as to form a limiting end between the second water outlet section and the first water outlet section.

[0015] The second blocking component is disposed within the first water outlet section, the second blocking component abuts against the limiting end, and the second blocking component covers the opening of the second water outlet section near the first water outlet section.

[0016] In one embodiment, the water outlet channel further includes:

[0017] The third water outlet section is connected to the second water outlet section. The first water outlet section, the second water outlet section and the third water outlet section are arranged sequentially along the water outlet direction of the water outlet channel. The inner diameter of the third water outlet section is larger than the inner diameter of the second water outlet section.

[0018] In one embodiment, the water collection component includes:

[0019] Water collection pipe body, the water collection pipe body having the water collection channel, the water passage hole and the opening; and

[0020] A water-sealing body is provided on the end of the water collection pipe that is away from the opening. The water-sealing body closes the open end of the water collection channel that is away from the opening. The water-sealing body and the water collection pipe are integrally formed together.

[0021] In one embodiment, the end of the water sealing body facing away from the water collection channel has a connecting hole for connecting to the outer shell of the purification device, and the end of the water outlet connector facing away from the water collection channel has a connecting part for connecting to the outer shell of the purification device.

[0022] In one embodiment, the pre-filter component is a structure made of reverse osmosis membrane material;

[0023] The post-filtration component includes mineralized filter media, or the post-filtration component includes mineralized carbon rods.

[0024] In one embodiment, the pre-filter component is a structure made of reverse osmosis membrane material;

[0025] The post-filter component includes a post-carbon rod and mineralized filter media. The post-carbon rod is inserted into the water collection channel and has a central hole that connects to the water outlet channel. The mineralized filter media is disposed in the central hole.

[0026] In one embodiment, the composite filter element further includes:

[0027] The third barrier component is disposed at the vertical first end of the central hole, and the third barrier component covers the vertical first end opening of the central hole. The third barrier component is used to allow the water output from the mineralized filter media to flow into the water outlet channel. At the same time, the third barrier component is also used to intercept the mineralized filter media.

[0028] A fourth barrier component is disposed at the second vertical end of the central hole, covering the opening at the second vertical end of the central hole, and is used to intercept the mineralized filter material.

[0029] Secondly, embodiments of this application provide a purification device, including the aforementioned composite filter element.

[0030] The advantages or beneficial effects of the above technical solutions include at least the following:

[0031] This invention integrates the post-filter component into the water collection channel within the water collection component. While maintaining the overall performance of the filter element, it achieves high integration, compactness, good space utilization, and simple installation. Secondly, because the composite filter element of this invention has a first blocking component, it can intercept the first particulate matter released by the post-filter component during water purification, preventing it from entering the outlet channel with the water flow. This design effectively avoids the deposition of the first particulate matter inside the composite filter element or in the downstream purification device, thereby reducing the risk of channel blockage and ensuring the long-term stability of filtration efficiency.

[0032] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0033] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0034] Figure 1 is a three-dimensional structural diagram of the composite filter element of this utility model;

[0035] Figure 2 is a cross-sectional view of the composite filter element according to the first embodiment of the present invention;

[0036] Figure 3 is a cross-sectional view of the composite filter element according to the second embodiment of the present invention;

[0037] Figure 4 is a cross-sectional view of the composite filter element according to the second embodiment of the present invention.

[0038] Figure Labels

[0039] 1. Water collection component; 11. Water collection pipe body; 111. Water collection channel; 112. Water passage hole; 12. Water sealing body; 121. Connecting hole; 2. Pre-filter component; 3. Post-filter component; 31. Mineralized filter media; 32. Mineralized carbon rod; 33. Post-carbon rod; 4. Water outlet connector; 41. Water outlet channel; 411. First water outlet section; 412. Second water outlet section; 413. Third water outlet section; 42. Connecting part; 5. First barrier component; 6. Second barrier component; 7. Third barrier component; 8. Fourth barrier component; 9. Sealing component. Detailed Implementation

[0040] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0041] Referring to Figures 1-4, a composite filter element according to a preferred embodiment of the present invention is shown, comprising:

[0042] Water collecting component 1 has a water collecting channel 111, a water passage hole 112 and an opening. The water collecting channel 111 extends vertically along the water collecting component 1. The water passage hole 112 is located on the side wall of the water collecting component 1 and is connected to the water collecting channel 111. The opening is located at the end of the water collecting component 1 and is connected to the water collecting channel 111.

[0043] The pre-filter component 2 is sleeved on the outer wall of the water collection component 1, and the pre-filter component 2 is connected to the water passage 112.

[0044] Post-filter component 3 is installed inside the water collection channel 111;

[0045] Water outlet connector 4 is inserted into the end of the water collection channel 111 that has an opening, the water outlet connector 4 covers the opening, and the water outlet connector 4 has a water outlet channel 41 that connects to the water collection channel 111; and

[0046] The first blocking component 5 is disposed between the post-filter component 3 and the water outlet connector 4. The first blocking component 5 covers one end opening of the water outlet channel 41 near the water collection channel 111. The first blocking component 5 is used to allow the water output from the post-filter component 3 to flow into the water outlet channel 41. The first blocking component 5 is also used to intercept the first particulate matter released by the post-filter component 3.

[0047] This invention integrates the post-filter component 3 into the water collection channel 111 inside the water collection component 1. While maintaining the overall performance of the filter element, this design achieves high integration, compactness, good space utilization, and simple installation. Furthermore, because the composite filter element of this invention is equipped with a first blocking component 5, it can intercept the first particulate matter released by the post-filter component 3 during the water purification process, preventing it from entering the outlet channel 41 with the water flow. This design effectively avoids the deposition of the first particulate matter inside the composite filter element or in the downstream purification device, thereby reducing the risk of channel blockage and ensuring the long-term stability of filtration efficiency.

[0048] Referring to Figures 2-4, in one embodiment, the composite filter element further includes:

[0049] The second barrier component 6 is located within the water outlet channel 41. It allows water from the post-filter component 3 to flow out of the channel 41. Simultaneously, it intercepts second particulate matter released by the post-filter component 3. The outer diameter of the second particulate matter is smaller than that of the first particulate matter, meaning the interception accuracy of the second barrier component 6 is higher than that of the first barrier component 5. Thus, during water purification, the second barrier component 6 intercepts the second particulate matter released by the post-filter component 3, preventing it from entering the water outlet channel 41 with the water flow. This design effectively avoids the deposition of second particulate matter inside the composite filter element or in downstream purification devices, thereby reducing the risk of channel blockage and ensuring the long-term stability of filtration efficiency.

[0050] In one embodiment, both the first barrier component 5 and the second barrier component 6 can be structures made of cotton. The use of cotton for the first barrier component 5 and the second barrier component 6 can effectively intercept particulate matter released during the filtration process, preventing it from entering the interior of the composite filter element or the downstream purification device.

[0051] In one embodiment, the cotton material is preferably polypropylene cotton, which has high porosity, good mechanical strength and chemical stability, and can balance high-efficiency filtration and durability. In addition, polypropylene cotton is a common industrial material, which helps to control production costs while ensuring filtration effect.

[0052] Referring to Figures 2-4, in one embodiment, the water outlet channel 41 includes:

[0053] The first water outlet section 411 is connected to the water collection channel 111; and

[0054] The second water outlet section 412 is connected to the first water outlet section 411. The first water outlet section 411 and the second water outlet section 412 are arranged one after the other along the water outlet direction of the water outlet channel 41. The inner diameter of the second water outlet section 412 is smaller than the inner diameter of the first water outlet section 411, so as to form a limiting end between the second water outlet section 412 and the first water outlet section 411.

[0055] The second barrier component 6 is disposed within the first outlet section 411, abutting against the limiting end, and covering the opening of the second outlet section 412 near the first outlet section 411. Thus, the stepped structure of the first outlet section 411 and the second outlet section 412 (with a smaller inner diameter in the second outlet section 412) forms the limiting end, ensuring the second barrier component 6 is securely installed and preventing displacement or detachment. Secondly, the second barrier component 6 covers the inlet of the second outlet section 412, completely intercepting particulate matter and preventing it from entering the downstream flow channel, ensuring the purity of the effluent. Furthermore, the segmented flow channel design (first outlet section 411 → second outlet section 412) achieves efficient filtration within a limited space while reducing water flow resistance and maintaining good water flow efficiency. Additionally, the tight abutment between the second barrier component 6 and the limiting end enhances sealing, preventing unfiltered water from flowing around the end and improving overall filtration reliability.

[0056] Referring to Figures 2-4, in one embodiment, the water outlet channel 41 further includes:

[0057] The third outlet section 413 connects to the second outlet section 412. The first outlet section 411, the second outlet section 412, and the third outlet section 413 are arranged sequentially along the outlet direction of the outlet channel 41. The inner diameter of the third outlet section 413 is larger than that of the second outlet section 412, meaning that the outlet channel 41 is a three-section channel. The three-section channel design (first outlet section 411 → second outlet section 412 → third outlet section 413) forms a stepped structure through changes in inner diameter (large → small → large), which can adjust the water flow velocity and pressure, reduce turbulence, and improve water flow stability. Secondly, the enlarged inner diameter of the third outlet section 413 can reduce the flow velocity, reduce the risk of secondary particle carryover, and further improve filtration reliability. In addition, the gradient change in the inner diameter of the channel can reduce the risk of impurity accumulation and avoid local blockage. Furthermore, the three-section channel design can flexibly adjust the length and inner diameter ratio of each section to adapt to different filtration needs, making it more adaptable and expandable.

[0058] Referring to Figures 2-4, in one embodiment, the water collection component 1 includes:

[0059] Water collection pipe 11, the water collection pipe 11 having a water collection channel 111, a water passage hole 112 and an opening; and

[0060] The water seal 12 is located on the end of the water collection pipe 11 facing away from the opening. The water seal 12 closes the open end of the water collection channel 111 facing away from the opening. The water seal 12 and the water collection pipe 11 are integrally formed, which is a robust structure with excellent sealing performance. This completely avoids the leakage risk that may occur in traditional assembled structures and improves product reliability. At the same time, the integrated water collection component 1 has a simpler structure and fewer parts, which can reduce assembly steps, reduce production complexity and cost, and avoid failure problems caused by the aging of additional seals. In addition, the integrated water collection component 1 can enhance the overall mechanical strength and pressure resistance, which is especially suitable for high water pressure applications. Furthermore, the water seal 12 precisely closes one end of the water collection channel 111 and forms a directional water flow channel with the open end, ensuring that the water flows strictly according to the design path (water collection channel 111 → water passage 112) to prevent short circuits or leakage.

[0061] Referring to Figures 2-4, in one embodiment, the end of the water-sealing body 12 facing away from the water collection channel 111 has a connecting hole 121 for connecting to the outer shell of the purification device. The end of the water outlet connector 4 facing away from the water collection channel 111 has a connecting part 42 for connecting to the outer shell of the purification device. The double-end connection structure between the water-sealing body 12 and the water outlet connector 4 (fixed via the connecting hole 121 and the connecting part 42 respectively) enhances the mechanical locking force between the composite filter element and the outer shell, preventing displacement or loosening caused by water flow impact. Secondly, the standardized design of the connecting hole 121 and the connecting part 42 enables quick docking with the outer shell of the purification device, simplifying the composite filter element replacement process and improving user convenience. Furthermore, the double-end connection structure between the water-sealing body 12 and the water outlet connector 4 (fixed via the connecting hole 121 and the connecting part 42 respectively) enhances the mechanical locking force between the filter element and the outer shell, preventing displacement or loosening caused by water flow impact.

[0062] Referring to Figures 2 and 3, in one embodiment, the pre-filter component 2 is a structure made of reverse osmosis membrane material;

[0063] The post-filter component 3 includes mineralized filter media 31, or it includes mineralized carbon rods 32. Thus, the pre-filter reverse osmosis membrane can deeply filter out microorganisms, heavy metals, and other minute impurities in the water, providing high-purity effluent. The post-filter mineralized filter media 31 or mineralized carbon rods 32, on top of purification, supplement beneficial minerals (such as calcium and magnesium), optimizing the taste and health of the water, achieving a dual function of "purification + mineralization." Furthermore, the synergistic design of the pre-filter reverse osmosis membrane and the post-filter mineralized filter media 31 or mineralized carbon rods 32 thoroughly removes contaminants first, then selectively adds minerals, avoiding the secondary precipitation problems that may occur with traditional activated carbon filtration. Additionally, the post-filter component 3 can be selected from mineralized filter media 31 (emphasizing mineral addition) or mineralized carbon rods 32 (balancing odor adsorption and mineralization) to meet the different water quality needs of users.

[0064] Referring to Figure 4, in one embodiment, the pre-filter component 2 is a structure made of reverse osmosis membrane material;

[0065] The post-filter component 3 includes a post-carbon rod 33 and a mineralized filter media 31. The post-carbon rod 33 is inserted into the water collection channel 111. The post-carbon rod 33 has a central hole that connects to the water outlet channel 41. The mineralized filter media 31 is disposed in the central hole. In this way, the pre-filter effectively removes pollutants such as bacteria, heavy metals, and organic matter from the water, ensuring water purity. The combination of post-filter carbon rod 33 and mineralized filter media 31 further adsorbs residual impurities (such as residual chlorine and odors) while replenishing the body with essential minerals (such as calcium and magnesium), improving water health and taste. In addition, the post-filter carbon rod 33 is inserted into the water collection channel 111, saving space and optimizing the internal layout of the filter element. The mineralized filter media 31 is built into the central hole of the post-filter carbon rod 33, forming an integrated "adsorption-mineralization" flow channel, reducing water flow resistance and improving filtration efficiency. Furthermore, the mineralized filter media 31 is directly placed in the water outlet path (central hole), ensuring uniform release of minerals and avoiding excessively high or low local concentrations, thus improving drinking water quality.

[0066] In one embodiment, the mineralized filter media 31 may be a filter media that releases metasilicic acid, a filter media that releases strontium, a filter media that improves the pH value of pure water, or other filter media containing beneficial elements.

[0067] Of course, in other embodiments, the mineralized filter media 31 can also be other similar functional filter media. Preferably, the functional filter media can be filter media that produces sparkling water or filter media that produces various beverage flavors.

[0068] Referring to Figure 4, in one embodiment, the composite filter element further includes:

[0069] The third barrier component 7 is located at the vertical first end of the central hole and covers the vertical first end opening of the central hole. The third barrier component 7 is used to allow the water output from the mineralized filter media 31 to flow into the water outlet channel 41. At the same time, the third barrier component 7 is also used to intercept the mineralized filter media 31.

[0070] The fourth barrier component 8 is located at the second vertical end of the central hole, covering the opening at the second vertical end of the central hole. The fourth barrier component 8 is used to intercept the mineralized filter media 31. The third barrier component 7 and the fourth barrier component 8, respectively covering the upper and lower openings of the central hole, form a double protection, effectively preventing the mineralized filter media 31 particles from escaping with the water flow and ensuring the purity of the effluent. Furthermore, the barrier design at both ends of the central hole fixes the position of the mineralized filter media 31, preventing it from shifting or loosening during the transportation or use of the composite filter element, ensuring long-term stability. Additionally, the third barrier component 7 also has a flow guiding function, allowing the mineralized water to enter the effluent channel 41 in an orderly manner, avoiding turbulence or local stagnation, and improving filtration efficiency.

[0071] In one embodiment, both the third barrier component 7 and the fourth barrier component 8 can be nonwoven fabric or cotton material.

[0072] Referring to Figures 2-4, in one embodiment, the composite filter element further includes:

[0073] The sealing component 9 is sandwiched between the hole wall of the water collection channel 111 and the outer wall of the water outlet connector 4. The sealing component 9 is arranged around the center line of the water outlet connector 4 along the water outlet direction to seal the gap between the water collection component 1 and the water outlet connector 4, ensuring that the water can be effectively filtered and improving the filtration effect.

[0074] A preferred embodiment of this utility model provides a purification device, including the aforementioned composite filter element.

[0075] The purification device of this invention, due to the use of the aforementioned composite filter element and the inclusion of a first blocking component 5, can intercept the first particulate matter released by the post-filter component 3 during the water purification process, preventing it from entering the outlet channel 41 with the water flow. This design effectively avoids the deposition of the first particulate matter inside the composite filter element or in the downstream purification device, thereby reducing the risk of channel blockage and ensuring the long-term stability of filtration efficiency.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," 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. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0078] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A composite filter element, characterized in that, include: A water collecting component has a water collecting channel, a water passage hole, and an opening. The water collecting channel extends vertically along the water collecting component. The water passage hole is located on the side wall of the water collecting component and communicates with the water collecting channel. The opening is located at the end of the water collecting component and communicates with the water collecting channel. A pre-filter component is sleeved on the outer wall of the water collection component and is connected to the water passage hole; a post-filter component is disposed in the water collection channel; and a water outlet connector is inserted into the end of the water collection channel with the opening, the water outlet connector covers the opening, and the water outlet connector has a water outlet channel that is connected to the water collection channel. And a first blocking component, the first blocking component being disposed between the post-filter component and the water outlet connector, the first blocking component covering the opening of the water outlet channel near the water collection channel, the first blocking component being used to allow the water output by the post-filter component to flow into the water outlet channel, the first blocking component also being used to intercept the first particulate matter released by the post-filter component.

2. The composite filter element according to claim 1, characterized in that, The composite filter element further includes a second barrier component, which is disposed in the water outlet channel. The second barrier component is used to allow the water output by the post-filter component to flow out of the water outlet channel. At the same time, the second barrier component is also used to intercept the second particulate matter released by the post-filter component. The outer diameter of the second particulate matter is smaller than the outer diameter of the first particulate matter.

3. The composite filter element according to claim 2, characterized in that, The water outlet channel includes: a first water outlet section connected to the water collection channel; and a second water outlet section connected to the first water outlet section. The first water outlet section and the second water outlet section are arranged one after the other along the water outlet direction of the water outlet channel. The inner diameter of the second water outlet section is smaller than the inner diameter of the first water outlet section, so as to form a limiting end between the second water outlet section and the first water outlet section. The second blocking component is disposed in the first water outlet section, the second blocking component abuts against the limiting end, and the second blocking component covers the opening of the second water outlet section near the first water outlet section.

4. The composite filter element according to claim 3, characterized in that, The water outlet channel further includes a third water outlet section, which is connected to the second water outlet section. The first water outlet section, the second water outlet section, and the third water outlet section are arranged sequentially along the water outlet direction of the water outlet channel. The inner diameter of the third water outlet section is larger than the inner diameter of the second water outlet section.

5. The composite filter element according to claim 1, characterized in that, The water collection component includes: a water collection pipe body having the water collection channel, the water passage hole, and the opening; and a water sealing body, which is disposed on the end of the water collection pipe body away from the opening, and the water sealing body closes the open end of the water collection channel away from the opening, and the water sealing body is integrally formed with the water collection pipe body.

6. The composite filter element according to claim 5, characterized in that, The water sealing body has a connecting hole at one end away from the water collection channel, which is used to connect to the outer shell of the purification device. The water outlet connector has a connecting part at one end away from the water collection channel, which is used to connect to the outer shell of the purification device.

7. The composite filter element according to claim 1, characterized in that, The pre-filter component is a structure made of reverse osmosis membrane material; the post-filter component includes mineralized filter media, or the post-filter component includes mineralized carbon rods.

8. The composite filter element according to claim 1, characterized in that, The pre-filter component is a structure made of reverse osmosis membrane material; the post-filter component includes a post-carbon rod and mineralized filter media. The post-carbon rod is inserted into the water collection channel and has a central hole that connects to the water outlet channel. The mineralized filter media is disposed in the central hole.

9. The composite filter element according to claim 8, characterized in that, The composite filter element further includes: a third barrier component, which is disposed at the vertical first end of the central hole and covers the vertical first end opening of the central hole. The third barrier component is used to allow water output from the mineralized filter media to flow into the water outlet channel, and at the same time, the third barrier component is also used to intercept the mineralized filter media; and a fourth barrier component, which is disposed at the vertical second end of the central hole and covers the vertical second end opening of the central hole. The fourth barrier component is used to intercept the mineralized filter media.

10. A purification device, characterized in that, The composite filter element includes any one of claims 1-9.

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