Water purifying filter element and water purifying device

Abstract

The application relates to a water purification filter core and a water purification device. In the water purification filter core, a purification body is arranged between an inner filter element and an outer filter element. In the water purification process, impurities carried by water are sequentially filtered and adsorbed by the outer filter element and the purification body when the water passes through the outer filter element and the purification body. The adsorbed water can pass through the inner filter element and be filtered. At this time, the obtained purified water enters a conveying channel and is discharged from a water outlet. Since the inner filter element separates the containing cavity from the conveying channel, even if the purification body releases the adsorbed impurities in the water purification process, the inner filter element can block the released impurities from directly entering the conveying channel and polluting the purified water. In this way, the release of the adsorbed harmful substances to the purified water is effectively reduced, and the water purification effect is improved.

Description

Technical Field

[0001] This application relates to the field of water purification technology, and in particular to water purification filter cartridges and water purification equipment. Background Technology

[0002] To ensure the quality of drinking water and reduce costs, water purification equipment typically employs microporous activated carbon granules or powder filtration technology to physically adsorb and remove small amounts of impurities such as microorganisms, chloride ions, ammonia nitrogen, and metal ions from tap water. However, activated carbon has a limited adsorption capacity and is easily saturated. Furthermore, harmful substances adsorbed on the surface of activated carbon can be released secondaryly, easily causing water contamination. Utility Model Content

[0003] Therefore, it is necessary to provide a water purification filter element and water purification equipment to reduce the probability of adsorbed harmful substances being released into the purified water and improve the water purification effect.

[0004] A water purification filter element includes: an outer filter element; an inner filter element, which is sleeved inside the outer filter element and forms a receiving cavity with the outer filter element, both ends of the receiving cavity along the length direction of the inner filter element are closed, both the outer filter element and the inner filter element are constructed to be water-permeable and have a filtration function, the inner filter element is provided with a conveying channel extending along its own length direction, at least one end of the conveying channel along the length direction of the inner filter element is a water outlet end; and a purification body, which is housed in the receiving cavity and is used to at least adsorb impurities in the water.

[0005] The aforementioned water purifier filter cartridge incorporates a purification element between the inner and outer filter elements. During the purification process, as water passes through the outer filter and purification element, impurities carried by the water are sequentially filtered and adsorbed by both elements. The adsorbed water then passes through the inner filter and is filtered again. The resulting purified water enters the delivery channel and is discharged from the outlet. Because the receiving cavity and delivery channel are separated by the inner filter, even if the purification element releases adsorbed impurities during purification, these impurities are blocked by the inner filter, preventing them from directly entering the delivery channel and contaminating the purified water. This effectively reduces the likelihood of adsorbed harmful substances being released into the purified water, thus improving the purification effect.

[0006] In some embodiments, the water purification filter cartridge further includes a first cover. One end of the outer filter element along the length of the inner filter element is connected to the circumferential side of the inner filter element, and the other end has an opening communicating with the receiving cavity. The first cover is placed over the opening. Thus, one end of the receiving cavity is closed, and the other end is open, which facilitates filling the receiving cavity with the purification element and also makes it easy to replace the purification element inside the receiving cavity. Simultaneously, the introduction of the first cover to seal the opening prevents external water from directly entering the receiving cavity without passing through the outer filter element, which helps improve the water purification effect.

[0007] In some embodiments, the first cover has an output section, and the first cover also covers one end of the inner filter element, with the output section communicating with the water outlet. This allows the filtered water in the conveying channel to be discharged outwards from the water outlet and the output section, thus meeting the user's need for purified water.

[0008] In some embodiments, the outer filter element includes a cylindrical portion and an end seal portion. The cylindrical portion is fitted over the inner filter element, and the end seal portion connects the cylindrical portion and the inner filter element. Thus, the cylindrical portion has an annular structure, encircling the outer periphery of the inner filter element, with its two ends spaced apart from the inner filter element. The introduction of the end seal portion, connecting one end of the outer filter element and the inner filter element, closes one end of the receiving cavity while leaving the other end open.

[0009] In some embodiments, the water purification filter cartridge further includes a filter element, which is fitted onto the surface of the outer filter element facing away from the inner filter element and connected to the first cover. It is understood that by fitting the filter element onto the surface of the outer filter element, the external water undergoes filtration through the filter element and the outer filter element sequentially before entering the receiving cavity, removing some impurities from the water, thus further improving the water purification effect.

[0010] In some embodiments, the water purification filter cartridge further includes a second cover, which covers the ends of the inner filter element, outer filter element, and filter element that are away from the first cover. It is understood that by introducing the second cover, the ends of the inner filter element, outer filter element, and filter element located on the same side can be covered and sealed, preventing external water from seeping in between the filter element and the outer filter element and affecting the water purification effect.

[0011] In some embodiments, the second cover includes an end cap, an edge portion, and an insertion portion. The edge portion is spaced apart from the insertion portion at the end cap and surrounds the outer periphery of the insertion portion. The insertion portion is inserted into one end of the conveying channel. The filter element, the outer filter element, and the inner filter element are all located between the insertion portion and the edge portion, and the edge portion surrounds the side of the filter element facing away from the outer filter element. Therefore, when sealing, the end cap can be placed over the ends of the filter element, the outer filter element, and the inner filter element on the same side, allowing the insertion portion to be inserted into one end of the conveying channel, and the filter element, the outer filter element, and the inner filter element are all inserted between the insertion portion and the edge portion. At this time, the edge portion surrounds the outer periphery of the filter element, forming an interlocking structure, thereby ensuring that the second cover stably covers one end of the filter element, the outer filter element, and the inner filter element.

[0012] In some embodiments, a first reinforcing portion and a second reinforcing portion are protruding from the surface of the end cap facing away from the insertion portion. The first reinforcing portion surrounds at least a portion of the outer periphery of the insertion portion, and the second reinforcing portion is connected to the side of the first reinforcing portion facing away from the insertion portion. Therefore, to resist water pressure, the first and second reinforcing portions can be provided on the back of the end cap. The first reinforcing portion surrounds the outer periphery of the insertion portion, strengthening the structure at the junction of the end cap and the insertion portion; while the second reinforcing portion is connected to the side of the first reinforcing portion facing away from the insertion portion, strengthening the structure of the first reinforcing portion on the end cap. This ensures that the second cap has a more stable and reliable structure during the water purification process.

[0013] In some embodiments, both the external and internal filter elements are constructed as microporous ceramic structures. Therefore, by utilizing the properties of microporous ceramics, impurities in the water can be filtered, which helps improve the quality of the purified water. Simultaneously, the microporous ceramic structure of the internal filter element can block impurities released by the purifier, preventing these impurities from re-entering the purified water and affecting its quality.

[0014] In some embodiments, the purifier includes one of activated carbon particles, silica balls, molecular sieves, diatomaceous earth, metal-organic framework compounds, and water purification materials loaded with antibacterial agents.

[0015] A water purification device, comprising any one of the above-mentioned water purification filter elements.

[0016] The aforementioned water purification equipment uses the above-mentioned water purification filter element, with a purification body placed between the inner and outer filter elements. During the purification process, as water passes through the outer filter element and the purification body, any impurities it carries are sequentially filtered and adsorbed by both elements. The adsorbed water can then pass through the inner filter element for further filtration. The resulting purified water enters the delivery channel and is discharged from the outlet. Because the receiving chamber and the delivery channel are separated by the inner filter element, even if the purification body releases adsorbed impurities during the purification process, these impurities will be blocked by the inner filter element, preventing them from directly entering the delivery channel and contaminating the purified water. This effectively reduces the likelihood of adsorbed harmful substances being released into the purified water, improving the purification effect. Attached Figure Description

[0017] Figure 1 This is a perspective view of the structure of the water purification filter element described in some embodiments of this application.

[0018] Figure 2 This is a cross-sectional view of the structure of the water purification filter element described in some embodiments of this application.

[0019] Figure 3 This is another perspective view of the structure of the water purification filter element described in some embodiments of this application.

[0020] 10. External filter element; 11. Cylinder body; 12. End seal; 20. Receiving cavity; 21. Opening; 30. Internal filter element; 31. Conveying channel; 32. Water outlet; 40. Filter element; 50. First cover; 51. Output section; 60. Second cover; 61. End cap; 62. Edge; 63. Insertion section; 64. First reinforcing section; 65. Second reinforcing section; 66. Third reinforcing section. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application.

[0023] Furthermore, where the terms "first" and "second" appear, these terms are 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 with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

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

[0025] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0026] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0027] In some embodiments, please refer to Figure 1 and Figure 2 This application provides a water purification filter element, comprising: an outer filter element 10, an inner filter element 30, and a purification body. The inner filter element 30 is sleeved inside the outer filter element 10, forming a receiving cavity 20 between them. Both ends of the receiving cavity 20 along the length direction of the inner filter element 30 are closed. Both the outer filter element 10 and the inner filter element 30 are constructed to be water-permeable and have a filtration function. The inner filter element 30 is provided with a conveying channel 31 extending along its own length direction, and at least one end of the conveying channel 31 along the length direction of the inner filter element 30 is a water outlet 32. The purification body is housed in the receiving cavity 20 and is used to at least adsorb impurities in the water.

[0028] The aforementioned water purification filter cartridge incorporates a purification element between the inner filter element 30 and the outer filter element 10. During the purification process, as water passes through the outer filter element 10 and the purification element, any impurities it carries are sequentially filtered and adsorbed by these elements. The adsorbed water can then pass through the inner filter element 30 and be filtered again. The resulting purified water enters the delivery channel 31 and is discharged from the outlet 32. Because the receiving cavity 20 and the delivery channel 31 are separated by the inner filter element 30, even if the purification element releases adsorbed impurities during the purification process, these impurities are blocked by the inner filter element 30, preventing them from directly entering the delivery channel 31 and contaminating the purified water. This effectively reduces the likelihood of adsorbed harmful substances being released into the purified water, thus improving the purification effect.

[0029] It should be noted that both the inner filter element 30 and the outer filter element 10 are water-permeable structures with filtration functions, such as, but not limited to, microporous ceramics, nanocomposite membranes, etc. When water passes through the outer filter element 10 and enters the receiving cavity 20 between the outer filter element 10 and the inner filter element 30, some impurities carried in the water can be filtered by the outer filter element 10. Since the receiving cavity 20 contains a purification body, the purification body can further filter and purify the water entering the receiving cavity 20, for example, it can adsorb at least trihalomethanes, organic matter, microorganisms, iron, manganese, heavy metals, chloride ions, etc. in the water. The purified water can pass through the inner filter element 30, enter the conveying channel 31, and be discharged outward from the outlet 32.

[0030] Furthermore, since an internal filter element 30 separates the receiving cavity 20 from the conveying channel 31, even if the purifier releases some impurities back into the receiving cavity 20 due to its own saturation, the internal filter element 30 will intercept these impurities, reducing the chance of secondary contamination of the purified water. The purifier can fill the receiving cavity 20 completely, or it can be left unfilled depending on actual needs. The purifier can be made of various materials, such as activated carbon particles, modified silica balls, molecular sieves, diatomaceous earth, MOFs (Metal-Organic Frameworks), and other adsorption-type porous materials, or functional purification materials loaded with antibacterial agents.

[0031] It should also be noted that both ends of the receiving cavity 20 along the length of the inner filter element 30 must be sealed to ensure that the receiving cavity 20 is in a closed state, preventing external water from directly entering the receiving cavity 20 without passing through the outer filter element 10 and causing water contamination. There are several ways to seal the two ends of the receiving cavity 20. For example, both ends of the outer filter element 10 can be sealed and connected to the inner filter element 30, forming the receiving cavity 20 between the middle of the outer filter element 10 and the middle of the inner filter element 30; or, one end of the outer filter element 10 can be connected to the inner filter element 30, while the other end is not connected, and the unconnected end is sealed using a cover plate structure.

[0032] Further, please refer to Figure 2 The water purification filter cartridge also includes a first cover 50. One end of the outer filter element 10 along the length of the inner filter element 30 is connected to the circumferential side of the inner filter element 30, and the other end has an opening 21 communicating with the receiving cavity 20. The first cover 50 is placed over the opening 21. Thus, one end of the receiving cavity 20 is closed, and the other end is open, which facilitates filling the receiving cavity 20 with the purification material and makes it easy to replace the purification material inside the receiving cavity 20. Simultaneously, the introduction of the first cover 50 to seal the opening 21 prevents external water from directly entering the receiving cavity 20 without passing through the outer filter element 10, which helps improve the water purification effect.

[0033] It should be noted that since the inner filter element 30 is fitted inside the outer filter element 10, the resulting opening 21 is an annular structure. Thus, when sealing the opening 21, the first cover 50 can also be an annular structure to cover the opening 21. Of course, the first cover 50 can also be a plate-like structure, which, while sealing the opening 21, also seals one end of the inner filter element 30. In this case, the end of the conveying channel 31 away from the first cover 50 can be the water outlet 32.

[0034] When the first cover 50 is closed on the opening 21, sealing treatment can be performed between the outer filter element 10 and the inner filter element 30 and the first cover 50 respectively. For example, rubber strips, glue, etc. can be set between the outer filter element 10 and the first cover 50, and between the inner filter element 30 and the first cover 50, to improve the overall sealing performance of the water purification filter element.

[0035] In some embodiments, please refer to Figure 2 The first cover 50 is provided with an output section 51, and the first cover 50 is also covered at one end of the inner filter element 30, and the output section 51 is connected to the water outlet 32. Therefore, when the first cover 50 is placed on the opening 21, the output section 51 is connected to the water outlet 32, so that the purified water filtered into the conveying channel 31 can be discharged outward from the water outlet 32 ​​and the output section 51 to meet the user's demand for purified water.

[0036] It should be noted that the output part 51 can be an orifice-shaped structure or a tubular structure on the first cover 50, and protrudes from the surface of the first cover 50.

[0037] For specific examples, please refer to Figure 2 The output section 51 is a tubular structure that penetrates the first cover 50. One end extends into the conveying channel 31, and the other end protrudes from the surface of the first cover 50 facing away from the opening 21. Thus, when purified water flows in the conveying channel 31, it can flow in from one end of the output section 51 and exit from the other end. The connection between the output section 51 and the first cover 50 can be, but is not limited to, threaded connection, welding, or bonding, or it can be a single-piece molding method, such as injection molding, die casting, or 3D printing.

[0038] In some embodiments, please refer to Figure 2 The outer filter element 10 includes a cylindrical portion 11 and an end seal portion 12. The cylindrical portion 11 is fitted over the inner filter element 30, and the end seal portion 12 connects the cylindrical portion 11 and the inner filter element 30. Thus, the cylindrical portion 11 has an annular structure, encircling the outer periphery of the inner filter element 30, with its two ends spaced apart from the inner filter element 30. The introduction of the end seal portion 12, connecting one end of the outer filter element 10 to the inner filter element 30, closes one end of the receiving cavity 20, leaving the other end open.

[0039] The end seal 12 connects the cylindrical body 11 and the inner filter element 30. The end seal 12 is also an annular structure, resulting in an approximately U-shaped relationship between the outer surfaces of the cylindrical body 11, the end seal 12, and the inner filter element 30. Furthermore, the end seal 12 and the cylindrical body 11 can be an integrated structure, which enhances the bonding strength and improves structural stability. Alternatively, the end seal 12 and the inner filter element 30 can also be designed as an integrated structure.

[0040] In some embodiments, please refer to Figure 2 The water purification filter cartridge also includes a filter element 40, which is fitted onto the surface of the outer filter element 10 facing away from the inner filter element 30 and connected to the first cover 50. It can be seen that by fitting the filter element 40 onto the surface of the outer filter element 10, the water from the outside undergoes filtration through the filter element 40 and the outer filter element 10 in sequence before entering the receiving cavity 20, removing some impurities from the water and thus further improving the water purification effect.

[0041] It should be noted that filter element 40 refers to the filtration structure fitted onto the outer surface of outer filter element 10, which provides preliminary filtration of water, such as removing larger particles like protozoa, algae, clay, silt, and viruses. The material of filter element 40 can be varied, including but not limited to non-woven fabric origami and gauze. In some specific examples, filter element 40 is made of non-woven fabric origami, which not only provides preliminary filtration but also increases the specific surface area of ​​filter element 40 through the folding process, thereby improving its filtration capacity.

[0042] When the filter element 40 is fitted onto the surface of the outer filter element 10, one end of the filter element 40 can be connected to the first cover 50. This seals the gap between one end of the filter element 40 and the outer filter element 10, preventing external water from seeping in between the filter element 40 and the outer filter element 10 and affecting the water purification effect. There are various ways to connect the filter element 40 and the first cover 50, such as, but not limited to, bonding and pressing.

[0043] Further, please refer to Figure 2 The water purification filter cartridge also includes a second cover 60, which covers the ends of the inner filter element 30, outer filter element 10, and filter element 40 that are away from the first cover 50. It can be seen that by introducing the second cover 60, the ends of the inner filter element 30, outer filter element 10, and filter element 40 located on the same side can be covered and sealed, preventing external water from seeping in between the filter element 40 and the outer filter element 10 and affecting the water purification effect.

[0044] The second cover 60 can be connected to the inner filter element 30, the outer filter element 10 and the filter element 40 in various ways, such as, but not limited to, pressing and bonding.

[0045] In some embodiments, please refer to Figure 2The second cover 60 includes an end cap portion 61, an edge portion 62, and an insertion portion 63. The edge portion 62 and the insertion portion 63 are spaced apart from each other on the end cap portion 61, and the edge portion 62 is arranged around the outer periphery of the insertion portion 63. The insertion portion 63 is inserted into one end of the conveying channel 31. The filter element 40, the outer filter element 10, and the inner filter element 30 are all located between the insertion portion 63 and the edge portion 62, and the edge portion 62 surrounds the side of the filter element 40 facing away from the outer filter element 10. It can be seen that when sealing, the end cap portion 61 can cover the ends of the filter element 40, the outer filter element 10, and the inner filter element 30 on the same side, so that the insertion portion 63 can be inserted into one end of the conveying channel 31, and the filter element 40, the outer filter element 10, and the inner filter element 30 are all inserted between the insertion portion 63 and the edge portion 62. At this time, the edge portion 62 surrounds the outer periphery of the filter element 40, forming an interlocking structure, so that the second cover 60 stably covers one end of the filter element 40, the outer filter element 10 and the inner filter element 30.

[0046] It should be noted that the end cap portion 61 refers to the main structure of the second cap body 60, which can cover the ends of the filter element 40, the outer filter element 10, and the inner filter element 30 on the same side, and can be a sheet-like or plate-like structure. The edge portion 62 can be a structure provided on the edge of the end cap portion 61, which protrudes along the thickness direction of the end cap portion 61 to form a flange structure, surrounding the outer surface of the filter element 40.

[0047] The insertion part 63 refers to the protruding structure on the end cap part 61. When the second cover 60 is installed on the water filter element, the insertion part 63 can be inserted into one end of the conveying channel 31. The insertion depth of the insertion part 63 in the conveying channel 31 can be determined according to the actual product and is not specifically limited here. At the same time, the insertion part 63 can be a hollow structure or a solid structure.

[0048] The edge portion 62 and the insertion portion 63 can be fixed to the end cap portion 61 by means of bonding, snap-fitting, etc. Of course, the three can also be integrated into one structure.

[0049] In some embodiments, please refer to Figure 2 and Figure 3 The end cap 61 has a first reinforcing part 64 and a second reinforcing part 65 protruding from its surface opposite to the insertion part 63. The first reinforcing part 64 surrounds at least a portion of the outer periphery of the insertion part 63, and the second reinforcing part 65 is connected to the side of the first reinforcing part 64 opposite to the insertion part 63. Therefore, to resist water pressure, the first reinforcing part 64 and the second reinforcing part 65 can be provided on the back of the end cap 61. The first reinforcing part 64 surrounds the outer periphery of the insertion part 63, strengthening the structure at the junction of the end cap 61 and the insertion part 63; while the second reinforcing part 65 is connected to the side of the first reinforcing part 64 opposite to the insertion part 63, strengthening the structure of the first reinforcing part on the end cap 61. This ensures that the second cap 60 has a more stable and reliable structure during the water purification process.

[0050] It should be noted that the number of first reinforcing parts 64 and second reinforcing parts 65 can be one or more. When there are multiple first reinforcing parts 64 and second reinforcing parts 65, all the first reinforcing parts 64 can be distributed at intervals around the outer periphery of the insertion part 63, and at least one second reinforcing part 65 is connected to each first reinforcing part 64. At the same time, in order to further improve the overall structural strength of the second cover 60, a third reinforcing part 66 can be provided between two adjacent second reinforcing parts 65.

[0051] Meanwhile, the connection method between the first reinforcing part 64 and the second reinforcing part 65 on the end cap part 61 can be, but is not limited to, bonding, bolting, snap-fitting, etc. Of course, the first reinforcing part 64, the second reinforcing part 65 and the end cap part 61 can also be an integrated structure.

[0052] In some embodiments, both the external filter element 10 and the internal filter element 30 are constructed as microporous ceramic structures. Therefore, by utilizing the properties of microporous ceramics, impurities in the water can be filtered, which helps improve the quality of purified water. Simultaneously, the microporous ceramic structure of the internal filter element 30 can block impurities released by the purifier, preventing these impurities from re-entering the purified water and affecting its quality.

[0053] In some embodiments, the purifier includes one of activated carbon particles, silica balls, molecular sieves, diatomaceous earth, metal-organic framework compounds, and water purification materials loaded with antibacterial agents.

[0054] In some embodiments, this application provides a water purification device, which includes the water purification filter element in any of the above embodiments.

[0055] The aforementioned water purification equipment uses the above-mentioned water purification filter cartridges, with a purification body placed between the inner filter element 30 and the outer filter element 10. During the purification process, as water passes through the outer filter element 10 and the purification body, any impurities it carries are sequentially filtered and adsorbed by these elements. The adsorbed water can then pass through the inner filter element 30 and be filtered again. The resulting purified water enters the conveying channel 31 and is discharged from the outlet 32. Because the receiving cavity 20 and the conveying channel 31 are separated by the inner filter element 30, even if the purification body releases adsorbed impurities during the purification process, these impurities will be blocked by the inner filter element 30, preventing them from directly entering the conveying channel 31 and contaminating the purified water. This effectively reduces the probability of adsorbed harmful substances being released into the purified water, improving the purification effect.

[0056] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A water purification filter element, characterized in that, The water purification filter element includes: External filter element (10); An inner filter element (30) is fitted inside the outer filter element (10) and forms a receiving cavity (20) with the outer filter element (10). Both ends of the receiving cavity (20) along the length direction of the inner filter element (30) are closed. Both the outer filter element (10) and the inner filter element (30) are constructed to be water-permeable and have a filtration function. The inner filter element (30) is provided with a conveying channel (31) extending along its own length direction. At least one end of the conveying channel (31) along the length direction of the inner filter element (30) is a water outlet (32). The purifier is housed in the containment cavity (20) and is used to adsorb at least impurities in the water.

2. The water purification filter element according to claim 1, characterized in that, The water purification filter element also includes a first cover (50). One end of the outer filter element (10) along the length direction of the inner filter element (30) is connected to the circumferential side of the inner filter element (30), and the other end has an opening (21) communicating with the receiving cavity (20) between it and the inner filter element (30). The first cover (50) covers the opening (21).

3. The water purification filter element according to claim 2, characterized in that, The first cover (50) is provided with an output part (51), and the first cover (50) is also covered on one end of the inner filter (30), and the output part (51) is connected to the water outlet (32).

4. The water purification filter element according to claim 2, characterized in that, The outer filter element (10) includes a cylindrical part (11) and an end seal part (12). The cylindrical part (11) is sleeved on the outside of the inner filter element (30), and the end seal part (12) is connected between the cylindrical part (11) and the inner filter element (30).

5. The water purification filter element according to claim 2, characterized in that, The water purification filter cartridge also includes a filter element (40), which is sleeved on the surface of the outer filter element (10) facing away from the inner filter element (30) and connected to the first cover (50).

6. The water purification filter element according to claim 5, characterized in that, The water purification filter element also includes a second cover (60), which covers the ends of the inner filter element (30), the outer filter element (10) and the filter element (40) that are away from the first cover (50).

7. The water purification filter element according to claim 6, characterized in that, The second cover (60) includes an end cap (61), an edge portion (62), and an insertion portion (63). The edge portion (62) and the insertion portion (63) are spaced apart from the end cap (61), and the edge portion (62) is arranged around the outer periphery of the insertion portion (63). The insertion portion (63) is inserted into one end of the conveying channel (31). The filter element (40), the outer filter element (10), and the inner filter element (30) are all located between the insertion portion (63) and the edge portion (62), and the edge portion (62) surrounds the side of the filter element (40) facing away from the outer filter element (10).

8. The water purification filter element according to claim 7, characterized in that, The end cap portion (61) has a first reinforcing portion (64) and a second reinforcing portion (65) protruding from the surface opposite to the insertion portion (63). The first reinforcing portion (64) surrounds at least a portion of the outer periphery of the insertion portion (63), and the second reinforcing portion (65) is connected to the side of the first reinforcing portion (64) opposite to the insertion portion (63).

9. The water purification filter element according to any one of claims 1-8, characterized in that, Both the outer filter element (10) and the inner filter element (30) are constructed as microporous ceramic structures; and / or, The purification body includes one of the following: activated carbon particles, silica balls, molecular sieves, diatomaceous earth, metal-organic framework compounds, and water purification materials loaded with antibacterial agents.

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

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