Composite filter element and water purifier

Abstract

The utility model provides a composite filter element and a water purifier, the composite filter element comprises: a support base body, the support base body is provided with an inner cavity, a first water inlet and a first water outlet; the positioning framework is arranged in the inner cavity, the positioning framework is provided with a raw water inlet channel, the raw water inlet channel is communicated with the first water inlet, the positioning framework and the cavity wall of the inner cavity form a filtering and purifying channel, and the filtering and purifying channel is communicated with the raw water inlet channel and the first water outlet; and the carbon filtering material is filled in the filtering and purifying channel. Due to the fact that the raw water inlet channel is formed in the positioning framework, water flows smoothly, water inlet resistance can be reduced, meanwhile, due to the fact that the carbon filtering material is a porous medium, the water flows can be dispersed into countless zigzag micro-channels when passing through the carbon filtering material, friction resistance between the water flows and the surface of the filtering material can be remarkably reduced, water outlet flow resistance is reduced, water outlet is smoother, and water outlet efficiency is improved. Therefore, the water outlet flow is improved, and the requirements of large flux and high flow speed can be met.

Description

Technical Field

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

[0002] The filter element is the core component of a water purifier. Different filter elements filter impurities in the water step by step through physical or chemical methods to ensure that the output water is safe and clean.

[0003] Currently, most pre-filter cartridges on the market typically use PPC or RO membrane reverse osmosis materials. They require a high-pressure booster pump to pressurize the cartridges to achieve the purpose of pre-filtration. This method of pressurizing the cartridges results in high water resistance and low flow rate, which cannot meet users' needs for high flow rate and high velocity. Utility Model Content

[0004] This application provides a composite filter element and a water purifier to solve the problems of high water resistance and low flow rate of existing pre-filter elements. The technical solution is as follows:

[0005] In a first aspect, embodiments of this application provide a composite filter element, comprising:

[0006] A supporting base having an inner cavity, a first inlet, and a first outlet;

[0007] A positioning frame is disposed within the inner cavity. The positioning frame has a raw water inlet channel that connects to the first water inlet. The positioning frame and the cavity wall of the inner cavity form a filtration and purification channel that connects to the raw water inlet channel and the first water outlet.

[0008] Carbon filter media, which is filled into the filtration and purification channel.

[0009] In one embodiment, the carbon filter media comprises:

[0010] Carbon granular filter media, wherein the carbon granular filter media fills the filtration and purification channel; and

[0011] Resin granular filter media, which is filled in the filtration and purification channel.

[0012] In one embodiment, the filtration and purification channel includes a first channel segment and a second channel segment, wherein the first channel segment and the second channel segment are arranged sequentially along the water outlet direction of the composite filter element;

[0013] Both the carbon granule filter media and the resin granule filter media are disposed within the first channel section;

[0014] The carbon filter media also includes:

[0015] Dry carbon fiber filter media, wherein the dry carbon fiber filter media is disposed within the second channel section.

[0016] In one embodiment, the composite filter element further includes:

[0017] The first porous filter medium is disposed on the positioning frame and is used to intercept particles in the raw water output from the raw water inlet channel.

[0018] In one embodiment, the composite filter element further includes:

[0019] The second porous filter medium is located within the filtration and purification channel. The second porous filter medium is used to intercept particles in the raw water before it enters the filtration and purification channel. The second porous filter medium is also used to prevent particles in the carbon filter media from escaping from the filtration and purification channel.

[0020] In one embodiment, the composite filter element further includes: a third porous filter medium located within the filtration and purification channel, the third porous filter medium being used to intercept particles in the purified water output from the filtration and purification channel, and the third porous filter medium also being used to prevent particles in the carbon filter media from escaping from the filtration and purification channel.

[0021] In one embodiment, the positioning skeleton includes:

[0022] A first end cap is connected to the support base. The first end cap has a second water inlet and a second water outlet. The second water inlet is connected to the first water inlet, and the second water outlet is connected to the filtration and purification channel and the first water outlet.

[0023] A central pipe, the first axial end of which is connected to the first end cap, the central pipe having the raw water inlet channel, the first axial end of which is connected to the second inlet; and

[0024] The second end cap is connected to the support base. The second end cap has a third water inlet and a third water outlet. The third water outlet is connected to the axial second end of the raw water inlet channel. The second end cap and the support base form a water passage. The water passage is connected to the third water outlet and the third water inlet. The third water inlet is also connected to the filtration and purification channel.

[0025] The first end cap, the second end cap, the outer peripheral wall of the central tube, and the side wall of the inner cavity form the filtration and purification channel, and the carbon filter material is axially sandwiched between the first end cap and the second end cap.

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

[0027] The first porous filter medium is disposed on the second end cap. The first porous filter medium is located on one side of the axial second end near the raw water inlet channel. The first porous filter medium is used to intercept particles in the raw water output from the raw water inlet channel.

[0028] The second porous filter medium is located in the filtration and purification channel. The second porous filter medium is sandwiched between the second end cap and the carbon filter media located in the filtration and purification channel. The second porous filter medium is used to intercept particles in the raw water before entering the filtration and purification channel. The second porous filter medium is also used to prevent particles in the carbon filter media from leaving the filtration and purification channel.

[0029] The third porous filter medium is located within the filtration and purification channel. The third porous filter medium is sandwiched between the first end cap and the carbon filter media located within the filtration and purification channel. The third porous filter medium is used to intercept particles in the purified water output from the filtration and purification channel. The third porous filter medium is also used to prevent particles in the carbon filter media from escaping from the filtration and purification channel.

[0030] In one embodiment, the first end cap has a first mounting hole, and the second end cap has a second mounting hole;

[0031] The first axial end of the central tube is sealed and inserted into the first mounting hole, and the second axial end of the central tube is sealed and inserted into the second mounting hole.

[0032] In one embodiment, the support substrate includes:

[0033] A barrel body having the inner cavity, a first axial end of the barrel body having a first water inlet and a first water outlet, and a second axial end of the barrel body having a mounting port communicating with the inner cavity, the mounting port being used for the positioning frame to enter and exit the inner cavity; and

[0034] A bucket lid is located at the second axial end of the bucket body. The bucket lid can close the mounting opening to confine the positioning skeleton within the inner cavity.

[0035] Secondly, embodiments of this application provide a water purifier, including the aforementioned composite filter element.

[0036] The advantages or beneficial effects of the above technical solutions include at least the following:

[0037] This novel composite filter cartridge, during filtration, allows water to flow through the first inlet into the raw water inlet channel, and then into the filtration and purification channel. In the purification channel, water comes into contact with the carbon filter media, which adsorbs residual chlorine and organic matter from the water flow, thus achieving water filtration. The raw water inlet channel formed on the positioning frame ensures smooth water flow and significantly reduces inlet resistance. Simultaneously, because the carbon filter media is a porous medium, the water flow is dispersed into numerous tortuous microchannels, significantly reducing frictional resistance between the water flow and the filter media surface. This reduces energy loss and, consequently, reduces outlet water flow resistance, resulting in smoother water flow and increased flow rate, meeting the demands of high throughput and high flow velocity.

[0038] 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

[0039] 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.

[0040] Figure 1 This is a three-dimensional structural diagram of the composite filter element of this utility model;

[0041] Figure 2 This is a cross-sectional view of the composite filter element of this utility model;

[0042] Figure 3 This is a three-dimensional structural diagram of the first end cap in this utility model.

[0043] Figure 4 This is a three-dimensional structural diagram of the second end cap in this utility model.

[0044] Figure Labels

[0045] 1. Supporting base; 11. Barrel body; 111. Inner cavity; 112. First water inlet; 113. First water outlet; 12. Barrel lid; 2. Positioning frame; 21. First end cap; 211. Second water inlet; 212. Second water outlet; 213. First mounting hole; 22. Central pipe; 221. Raw water inlet channel; 23. Second end cap; 231. Third water inlet; 232. Third water outlet; 233. Second mounting hole; 3. Filtration and purification channel; 4. Carbon granule filter media; 5. Resin granule filter media; 6. Dry carbon fiber filter media; 7. First porous filter medium; 8. Second porous filter medium; 9. Third porous filter medium. Detailed Implementation

[0046] 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.

[0047] See Figures 1-4 This invention illustrates a preferred embodiment of a composite filter element, comprising:

[0048] Support base 1, the support base 1 has an inner cavity 111, a first water inlet 112 and a first water outlet 113;

[0049] Positioning frame 2 is located inside the inner cavity 111. Positioning frame 2 has a raw water inlet channel 221, which is connected to the first water inlet 112 to deliver raw water to the raw water inlet channel 221. Positioning frame 2 and the cavity wall of the inner cavity 111 form a filtration and purification channel 3. The filtration and purification channel 3 is connected to the raw water inlet channel 221 and the first water outlet 113 so that the raw water output from the raw water inlet channel 221 can be delivered to the filtration and purification channel 3, and at the same time, the purified water output from the filtration and purification channel 3 can be delivered to the first water outlet 113 for use.

[0050] Carbon filter media is filled in the filtration and purification channel 3. The carbon filter media is used to adsorb organic matter, residual chlorine, odor, pesticide residues and heavy metals in the raw water.

[0051] In this composite filter element, during filtration, water flows through the first inlet 112 into the raw water inlet channel 221, and then into the filtration and purification channel 3. In the filtration and purification channel 3, water comes into contact with the carbon filter media, which adsorbs residual chlorine and organic matter from the water flow, thus filtering the water. The raw water inlet channel 221 formed on the positioning frame 2 ensures smooth water flow and significantly reduces inlet resistance. Simultaneously, because the carbon filter media is a porous medium, the water flow is dispersed into numerous tortuous microchannels, significantly reducing the frictional resistance between the water flow and the filter media surface. This reduces energy loss and, consequently, reduces the resistance to outflow, resulting in smoother outflow and increased flow rate, meeting the requirements for high throughput and high flow velocity.

[0052] See Figure 2 In one embodiment, the carbon filter media includes:

[0053] Carbon granule filter media 4 is filled into the filtration and purification channel 3. Specifically, activated carbon granule filter media 4 is used to adsorb organic matter, residual chlorine, odors, pesticide residues, and heavy metals from the raw water.

[0054] Resin granular filter media 5 is filled in the filtration and purification channel 3. The resin granular filter media 5 is used to remove heavy metals (such as lead and mercury), soften water (remove calcium and magnesium ions), or specific pollutants (such as nitrates) from the raw water. It is combined with carbon granular filter media 4 to form a composite adsorption material, which takes into account both physical adsorption and chemical ion exchange, and can improve water quality.

[0055] In this composite filter cartridge, during filtration, water flows through the first inlet 112 into the raw water inlet channel 221, and then into the filtration and purification channel 3. In the filtration and purification channel 3, the water comes into contact with the carbon particle filter media 4, which adsorbs residual chlorine, organic matter, etc. in the water flow. At the same time, the water comes into contact with the resin particle filter media 5, which replaces calcium and magnesium ions, thereby improving the taste. In this design, the filtration and purification channel 3 is formed by the positioning frame 2 and the cavity wall of the inner cavity 111. The filtration and purification channel 3 simultaneously carries both carbon granular filter media 4 and resin granular filter media 5, meaning that the carbon granular filter media 4 and resin granular filter media 5 are directly mixed and filled into the same filtration and purification channel 3, achieving shared filtration and purification channel 3 instead of being separately packaged in independent shells. This eliminates the partitions, seals, and other structures in traditional composite filter elements, thus reducing the volume of the composite filter element and the space it occupies. In addition, the raw water inlet channel 221 formed on the positioning frame 2 ensures smooth water flow and greatly reduces inlet resistance. At the same time, the carbon granular filter media 4 and resin granular filter media 5 form a porous medium, which disperses the water flow into countless tortuous micro-channels, significantly reducing the frictional resistance between the water flow and the filter media surface. This reduces energy loss, thereby reducing water flow resistance and making the water flow smoother, thus increasing the water flow rate and meeting the demand for high-flow water. In summary, this composite filter cartridge, through the shared filtration and purification channel 3 and the mixed filter media, can significantly reduce its volume while ensuring filtration performance.

[0056] See Figure 2 In one embodiment, the filtration and purification channel 3 includes a first channel section and a second channel section, which are arranged sequentially along the water outlet direction of the composite filter element. Specifically, in this embodiment, the first channel section and the second channel section are arranged sequentially along the water outlet direction of the composite filter element. Figure 2 The vertical arrangement shown is from top to bottom;

[0057] Both the carbon granular filter media 4 and the resin granular filter media 5 are located within the first channel section;

[0058] Carbon filter media also includes:

[0059] Dry carbon fiber filter media 6 is installed in the second channel section. The dry carbon fiber filter media is used to adsorb odors, residual chlorine, pesticide residues, etc. in the water output from the first channel section, which can further improve the filtration effect. At the same time, since the micropores of the dry carbon fiber filter media 6 are evenly distributed, the flow rate can be reduced. The reduced flow rate will significantly reduce the frictional resistance between the water flow and the surface of the filter media, thereby reducing energy loss, that is, reducing water flow resistance, making the water output smoother, and further increasing the water flow rate.

[0060] See Figure 2 In one embodiment, the composite filter element further includes:

[0061] The first porous filter medium 7 is disposed on the positioning frame 2. The first porous filter medium 7 is used to intercept particles in the raw water output from the raw water inlet channel 221 to play a preliminary filtration role, prevent the pores between the particle filter media from being blocked, and extend the service life of the composite filter element.

[0062] In one embodiment, the first porous filter medium 7 may specifically be filter cotton. Of course, in other embodiments, the first porous filter medium 7 may also be non-woven fabric.

[0063] See Figure 2 In one embodiment, the composite filter element further includes:

[0064] The second porous filter medium 8 is located inside the filtration and purification channel 3. The second porous filter medium 8 is used to intercept particles in the raw water before entering the filtration and purification channel 3, so as to play a preliminary filtration role, prevent the pores between the particle filter media from being blocked, and extend the service life of the composite filter element. The second porous filter medium 8 is also used to prevent the carbon particle filter media 4 and the resin particle filter media 5 from leaving the filtration and purification channel 3, ensuring that the carbon particle filter media 4 and the resin particle filter media 5 are reliably installed in the filtration and purification channel 3.

[0065] In one embodiment, the second porous filter medium 8 can be a non-woven fabric. Of course, in other embodiments, the second porous filter medium 8 can also be filter cotton.

[0066] See Figure 3 In one embodiment, the composite filter element further includes a third porous filter medium 9, which is located within the filtration and purification channel 3. The third porous filter medium 9 is used to intercept particles in the purified water output from the filtration and purification channel 3 to perform secondary filtration and further improve water quality. The third porous filter medium 9 is also used to prevent the carbon particle filter media 4 and the resin particle filter media 5 from detaching from the filtration and purification channel 3, ensuring that the carbon particle filter media 4 and the resin particle filter media 5 are reliably installed within the filtration and purification channel 3.

[0067] In one embodiment, the third porous filter medium 9 can be a non-woven fabric. Of course, in other embodiments, the third porous filter medium 9 can also be filter cotton.

[0068] See Figure 2 In one embodiment, the positioning skeleton 2 includes:

[0069] The first end cap 21 is connected to the support base 1. The first end cap 21 has a second inlet 211 and a second outlet 212. The second inlet 211 is connected to the first inlet 112, and the second outlet 212 is connected to the filter purification channel 3 and the first outlet 113, so that the purified water output from the filter purification channel 3 can be delivered to the first outlet 113.

[0070] A central pipe 22, with its axial first end connected to a first end cap 21, has a raw water inlet channel 221. The axial first end of the raw water inlet channel 221 is connected to a second inlet 211, so that the axial first end of the raw water inlet channel 221 is connected to the first inlet 112, ensuring that raw water can be input into the raw water inlet channel 221; and

[0071] The second end cap 23 is connected to the support base 1. The second end cap 23 has a third inlet 231 and a third outlet 232. The third outlet 232 is connected to the second axial end of the raw water inlet channel 221. The second end cap 23 and the support base 1 form a water passage. The water passage connects the third outlet 232 and the third inlet 231. The third inlet 231 is also connected to the filtration and purification channel 3, so that the raw water output from the second axial end of the raw water inlet channel 221 can be transported to the filtration and purification channel 3 through the water passage. The water passage serves as an intermediate transition cavity connecting the raw water inlet channel 221 and the filtration and purification channel 3, realizing a seamless change of water flow from the axial direction (raw water inlet channel 221) to the axial direction (filtration and purification channel 3), avoiding additional connecting pipes.

[0072] The outer peripheral wall of the first end cap 21, the second end cap 23, the central tube 22, and the side wall of the inner cavity 111 form a filtration and purification channel 3. That is, the filtration and purification channel 3 is arranged around the raw water inlet channel 221. The first end cap 21 and the second end cap 23 axially clamp carbon granule filter media 4 and resin granule filter media 5 to restrict their axial movement and ensure their stable distribution. The first end cap 21 and the second end cap 23 connect to the support base 1, reliably installing the positioning frame 2 within the inner cavity 111. Simultaneously, since the axial ends of the central tube 22 are connected to the first end cap 21 and the second end cap 23 respectively, a stable frame structure is formed, ensuring the long-term stable distribution of the filter media within the filtration and purification channel 3.

[0073] See Figure 2 In one embodiment, the first porous filter medium 7 is disposed in the first positioning groove of the second end cap 23 to fix the first porous filter medium 7. The first porous filter medium 7 is located on one side near the axial second end of the raw water inlet channel 221.

[0074] See Figure 2In one embodiment, the second porous filter medium 8 is disposed in the second positioning groove of the second end cap 23, and the second porous filter medium 8 is sandwiched between the second end cap 23 and the carbon particle filter material 4 and the resin particle filter material 5 located in the filtration and purification channel 3, so as to fix the second porous filter medium 8.

[0075] See Figure 2 In one embodiment, the third porous filter medium 9 is sandwiched between the first end cap 21 and the carbon particle filter media 4 and resin particle filter media 5 located in the filtration and purification channel 3. The third porous filter medium 9 is used to intercept particles in the purified water output from the filtration and purification channel 3 to fix the third porous filter medium 9.

[0076] To achieve rapid installation of the central tube 22, see [link / reference]. Figure 2 In one embodiment, the first end cap 21 has a first mounting hole 213, and the second end cap 23 has a second mounting hole 233;

[0077] The first axial end of the central tube 22 is sealed and inserted into the first mounting hole 213. A first sealing ring is sandwiched between the first axial end of the central tube 22 and the first mounting hole 213 to seal the gap between the central tube 22 and the first mounting hole 213. The second axial end of the central tube 22 is sealed and inserted into the second mounting hole 233. A second sealing ring is sandwiched between the second axial end of the central tube 22 and the second mounting hole 233 to seal the gap between the central tube 22 and the second mounting hole 233.

[0078] See Figure 1 In one embodiment, the support substrate 1 includes:

[0079] The barrel body 11 has an inner cavity 111. A first axial end of the barrel body 11 has a first inlet 112 and a first outlet 113. A second axial end of the barrel body 11 has a mounting port that communicates with the inner cavity 111 and is used for the positioning frame 2 to enter and exit the inner cavity 111.

[0080] The barrel lid 12 is located at the second axial end of the barrel body 11. The barrel lid 12 can close the installation port to confine the positioning frame 2 within the inner cavity 111. Thus, during installation, the assembly of the first end cap 21 and the central tube 22 is inserted into the inner cavity 111 through the installation port, followed by filling with filter media, then installing the second end cap 23, and finally installing the barrel lid 12. This greatly simplifies the installation process and improves installation efficiency.

[0081] Specifically, in other embodiments, one of the bucket body 11 and the bucket lid 12 is provided with a locking hole, and the other is provided with a buckle. The buckle and the locking hole cooperate to connect the bucket body 11 and the bucket lid 12 together without tools. The connection operation is convenient, the connection efficiency is high, and the installation is convenient. At the same time, a third sealing ring is sandwiched between the bucket body 11 and the bucket lid 12 to seal the gap between the bucket body 11 and the bucket lid 12 and prevent water leakage.

[0082] Specifically, in one embodiment, the barrel body 11 has a third mounting hole located inside the inner cavity 111. The first end cap 21 is provided with a plug-in part, which is sealed and inserted into the third mounting hole. That is, the plug-in part is inserted into the third mounting hole. A fourth sealing ring is sandwiched between the plug-in part and the third mounting hole to achieve tool-free connection of the first end cap 21 and the support base 1. The connection operation is convenient, the connection efficiency is high, and the installation is convenient.

[0083] Specifically, in one embodiment, the second end cap 23 abuts against the barrel cap 12 to achieve a connection between the second end cap 23 and the support base 1 without connection, which is convenient, efficient and easy to install.

[0084] A preferred embodiment of this utility model provides a water purifier, including the aforementioned composite filter element.

[0085] This water purifier, employing the aforementioned composite filter element, allows water to enter the raw water inlet channel 221 through the first inlet 112 during filtration. It then enters the filtration and purification channel 3, where it comes into contact with the carbon filter media. The carbon filter media adsorbs residual chlorine and organic matter from the water, thus filtration. The raw water inlet channel 221, formed on the positioning frame 2, ensures smooth water flow and significantly reduces inlet resistance. Furthermore, the porous nature of the carbon filter media disperses the water flow into numerous tortuous microchannels, significantly reducing frictional resistance between the water flow and the filter media surface. This reduces energy loss and decreases outlet water flow resistance, resulting in smoother water flow and increased flow rate, meeting the demands for high throughput and high velocity.

[0086] 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.

[0087] 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.

[0088] 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 supporting base having an inner cavity, a first inlet, and a first outlet; A positioning frame is disposed within the inner cavity. The positioning frame has a raw water inlet channel that connects to the first water inlet. The positioning frame and the cavity wall of the inner cavity form a filtration and purification channel that connects to the raw water inlet channel and the first water outlet. as well as Carbon filter media, which is filled into the filtration and purification channel.

2. The composite filter element according to claim 1, characterized in that, The carbon filter media includes: Carbon granular filter media, wherein the carbon granular filter media fills the filtration and purification channel; and Resin granular filter media, which is filled in the filtration and purification channel.

3. The composite filter element according to claim 2, characterized in that, The filtration and purification channel includes a first channel section and a second channel section, which are arranged sequentially along the water outlet direction of the composite filter element. Both the carbon granule filter media and the resin granule filter media are disposed within the first channel section; The carbon filter media also includes: Dry carbon fiber filter media, wherein the dry carbon fiber filter media is disposed within the second channel section.

4. The composite filter element according to claim 1, characterized in that, The composite filter element also includes: The first porous filter medium is disposed on the positioning frame and is used to intercept particles in the raw water output from the raw water inlet channel.

5. The composite filter element according to claim 4, characterized in that, The composite filter element also includes: The second porous filter medium is located within the filtration and purification channel. The second porous filter medium is used to intercept particles in the raw water before it enters the filtration and purification channel. The second porous filter medium is also used to prevent particles in the carbon filter media from escaping from the filtration and purification channel.

6. The composite filter element according to claim 4, characterized in that, The composite filter element further includes a third porous filter medium located within the filtration and purification channel. The third porous filter medium is used to intercept particles in the purified water output from the filtration and purification channel and also to prevent particles in the carbon filter media from escaping from the filtration and purification channel.

7. The composite filter element according to claim 1, characterized in that, The positioning skeleton includes: A first end cap is connected to the support base. The first end cap has a second water inlet and a second water outlet. The second water inlet is connected to the first water inlet, and the second water outlet is connected to the filtration and purification channel and the first water outlet. A central pipe, the first axial end of which is connected to the first end cap, the central pipe having the raw water inlet channel, the first axial end of which is connected to the second inlet; and The second end cap is connected to the support base. The second end cap has a third water inlet and a third water outlet. The third water outlet is connected to the axial second end of the raw water inlet channel. The second end cap and the support base form a water passage. The water passage is connected to the third water outlet and the third water inlet. The third water inlet is also connected to the filtration and purification channel. The first end cap, the second end cap, the outer peripheral wall of the central tube, and the side wall of the inner cavity form the filtration and purification channel, and the carbon filter material is axially sandwiched between the first end cap and the second end cap.

8. The composite filter element according to claim 7, characterized in that, The composite filter element also includes: The first porous filter medium is disposed on the second end cap. The first porous filter medium is located on one side of the axial second end near the raw water inlet channel. The first porous filter medium is used to intercept particles in the raw water output from the raw water inlet channel. The second porous filter medium is located in the filtration and purification channel. The second porous filter medium is sandwiched between the second end cap and the carbon filter media located in the filtration and purification channel. The second porous filter medium is used to intercept particles in the raw water before entering the filtration and purification channel. The second porous filter medium is also used to prevent particles in the carbon filter media from leaving the filtration and purification channel. The third porous filter medium is located within the filtration and purification channel. The third porous filter medium is sandwiched between the first end cap and the carbon filter media located within the filtration and purification channel. The third porous filter medium is used to intercept particles in the purified water output from the filtration and purification channel. The third porous filter medium is also used to prevent particles in the carbon filter media from escaping from the filtration and purification channel.

9. The composite filter element according to claim 1, characterized in that, The supporting matrix includes: A barrel body having the inner cavity, a first axial end of the barrel body having a first water inlet and a first water outlet, and a second axial end of the barrel body having a mounting port communicating with the inner cavity, the mounting port being used for the positioning frame to enter and exit the inner cavity; and A bucket lid is located at the second axial end of the bucket body. The bucket lid can close the mounting opening to confine the positioning skeleton within the inner cavity.

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

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