Segmented combined composite filter element and water purification device with water inlet and outlet at one end

Abstract

The present invention belongs to the technical field of water purification equipment, and discloses a segmented combined composite filter element with water inlet and outlet at one end, characterized in that it comprises a bottom filter element and more than one series filter element, the bottle mouth of the lower series filter element is sequentially inserted into the bottle mouth of the upper series filter element to form a whole, the bottom filter element is inserted into the bottle bottom of the adjacent series filter element, and the water inlet and outlet of the segmented combined composite filter element with water inlet and outlet at one end and connected to the outside are both arranged at the bottle mouth of the top series filter element; the segmented combined composite filter element with water inlet and outlet at one end provided by the present invention can realize a composite filter element with multiple filter materials as a whole, and greatly improves the flexibility of filter element use, and users can freely match series filter elements with different filter materials according to local water quality, and the application is flexible and convenient, and when replacing the filter element, there is no need to discard the filter element as a whole, only the series filter element or the bottom filter element whose service life has expired needs to be replaced, which greatly reduces the user's use cost.

Description

Technical Field

[0001] The invention belongs to the technical field of water purification equipment, and in particular relates to a segmented combined composite filter element with water inlet and outlet at one end and a water purification device. Background Art

[0002] As people pay more and more attention to the safety of drinking water, household water dispensers and water purifiers have gradually become essential household appliances for household drinking water, and the water purification filter is the most core component of the water purifier. According to different requirements for filtered water and differences in water quality in different regions, different types and numbers of filter elements can be set in the water purifier to meet users' needs for different drinking water.

[0003] At present, the filter element settings on the market are roughly divided into two categories. One is that a filter element is only loaded with one filter material. When in use, multiple filter elements are placed side by side in the water purifier according to different needs of users, and then the filter elements are connected by complex external water channels. The assembly is cumbersome, the water purifier is large in size, and occupies a large space; the other is a composite filter element, which integrates multiple filter materials in the filter barrel of a filter element. Although the composite filter element can effectively reduce the number of filter elements, thereby reducing the size of the water purifier, the defects are also very obvious. This filter element is an inseparable whole. Due to the differences in water quality in various places, filter elements with different combinations of filter materials need to be used. Therefore, the flexibility of the existing composite filter element is greatly limited. Users cannot conveniently adjust it at any time according to their needs. In addition, since the composite filter element is an inseparable whole, as long as one filter material expires, the entire filter element must be replaced, resulting in a large waste of filter materials, thereby increasing user usage costs.

[0004] In summary, the prior art has the following technical problems and defects:

[0005] (1) Multiple filter elements with a single filter material are arranged side by side, which is cumbersome to assemble and occupies a large volume inside the water purifier;

[0006] (2) Although the existing composite filter element can effectively reduce the number of filter elements, its flexibility is poor. Users cannot conveniently adjust the filter element at any time according to water demand. In addition, since the composite filter element is a non-detachable whole, as long as one type of filter material expires, the entire filter element must be replaced, resulting in a large waste of filter materials, thereby increasing user costs. Summary of the invention

[0007] In view of the problems existing in the prior art, the present invention provides a segmented combined composite filter element with water inlet and outlet at one end, comprising a bottom filter element and more than one series filter element, wherein the bottle mouth of the lower series filter element is sequentially inserted into the bottle mouth of the upper series filter element to form a whole, and the bottom filter element is inserted into the bottle bottom of the adjacent series filter element;

[0008] The water inlet and outlet of the segmented combined composite filter element for water inlet and outlet at one end and the water inlet and outlet communicating with the outside are both arranged at the bottle mouth located at the top end in series with the filter element;

[0009] The interior of the series filter element is provided with an inlet flow path and an outlet flow path that are not connected to each other, and the inlet flow paths of two adjacent series filter elements are independently connected to each other, and the outlet flow paths are independently connected to each other. A filter material assembly is provided on the outlet flow path of the series filter element, and the bottom filter element is provided with an inlet flow path and an outlet flow path that are connected to each other. The inlet flow path and the outlet flow path of the bottom filter element are independently connected to the inlet flow path and the outlet flow path of the adjacent series filter element.

[0010] Preferably, the water inlet ends of the series filter element and the bottom filter element are both provided with a raw water inlet and a filtered water outlet, the water inlet flow path of the series filter element is respectively connected to its own raw water inlet and the raw water inlet of the adjacent series filter element, and the water outlet flow path of the series filter element is respectively connected to its own filtered water outlet and the filtered water outlet of the adjacent series filter element;

[0011] The raw water inlet of the bottom filter element is respectively connected to its own water inlet flow path and the water inlet flow path of the adjacent series filter element, and the filtered water outlet of the bottom filter element is respectively connected to its own water outlet flow path and the water outlet flow path of the adjacent series filter element.

[0012] Preferably, the filter material assembly is a full-filter filter material assembly, such as an activated carbon filter material assembly, a granular carbon filter material assembly, a composite carbon fiber filter material assembly, a PP cotton filter material assembly or a UF filter material assembly.

[0013] Preferably, the serial filter element comprises an outer tube 1, the upper end of the outer tube 1 is provided with a protruding bottle mouth, the lower end is provided with a stepped hole, the outer wall of the protruding bottle mouth of the outer tube 1 is provided with a clamping boss, and the outer hole of the stepped hole of the outer tube 1 is installed with a clamping block;

[0014] Preferably, two clamping blocks are symmetrically arranged and can elastically telescopically slide in a direction away from or close to the central axis of the filter element.

[0015] Preferably, a separation cylinder is provided inside the outer cylinder 1 of the series filter element to divide the interior of the outer cylinder 1 into two independent cavities, and a filter material assembly is provided inside the separation cylinder.

[0016] Preferably, the upper end of the separation cylinder extends to the bottle mouth of the outer cylinder to separate the bottle mouth into the raw water inlet and the filtered water outlet of the series filter element, and the lower end of the separation cylinder extends to the stepped hole at the lower end of the outer cylinder.

[0017] Preferably, the separation cylinder comprises a guide tower, a cylinder body and a lower end cover, and the guide tower and the lower end cover are respectively mounted on both ends of the cylinder body.

[0018] Preferably, the cavity between the separation cylinder and the outer cylinder forms a water inlet flow path of the series-connected filter element, and the interior of the separation cylinder forms a water outlet flow path of the series-connected filter element.

[0019] Preferably, the bottom filter element includes a series filter element and a plugging cover, which are assembled by the series filter element and the plugging cover. The plugging cover is provided with a snap-in boss on the outer wall. The plugging cover is clamped in the stepped hole of the outer tube through a snap-in block. The outer wall of the plugging cover is sealed with the inner wall of the inner hole of the stepped hole.

[0020] A water inlet flow path of the bottom filter element is formed between the filter material assembly and the outer cylinder, and a water outlet flow path of the bottom filter element is formed inside the filter material assembly.

[0021] Preferably, the bottom filter element comprises a second outer cylinder, a filter material assembly and a guide tower, the upper end of the second outer cylinder is provided with a protruding bottle mouth, the lower end is sealed, the filter material assembly is arranged inside the second outer cylinder, and the guide tower is arranged inside the bottle mouth of the second outer cylinder to separate the bottle mouth into a raw water inlet and a filtered water outlet of the bottom filter element;

[0022] The upper end of the filter material assembly is sealed and connected to the lower end of the guide tower.

[0023] Preferably, a water inlet flow path of the bottom filter element is formed between the filter material assembly and the second outer cylinder, and a water outlet flow path of the bottom filter element is formed inside the filter material assembly. The water flow in the water inlet flow path of the bottom filter element can be filtered through the filter material and enter the water outlet flow path of the bottom filter element.

[0024] Another object of the present invention is to provide a water purification device, which is equipped with the segmented combined composite filter element with water inlet and outlet at one end.

[0025] Combining all the above technical solutions, the advantages and positive effects of the present invention are as follows:

[0026] (1) The segmented combined composite filter element with water inlet and outlet at one end provided by the present invention divides the filter element in the water purifier into multiple series-connected filter elements and a bottom filter element. The multiple series-connected filter elements and the bottom filter element can be connected and spliced ​​into an integral composite filter element. Different types of full-flow filtration filter material components can be placed in each series-connected filter element and the bottom filter element, which can not only realize that a plurality of filter materials are combined into one filter element as a whole, reduce the number of filter elements used to achieve the purpose of reducing the volume of the water purifier, but also greatly improve the flexibility of filter element use. The series-connected filter element and the bottom filter element can be connected in series in any number according to needs. Users can freely match series-connected filter elements with different filter materials according to local water quality. The application is flexible and convenient. When replacing the filter element, there is no need to discard the filter element as a whole. Only the series-connected filter element or the bottom filter element whose service life has expired needs to be replaced, which greatly reduces the user's use cost.

[0027] (2) The segmented combined composite filter element for water inlet and outlet at one end provided by the present invention and the water inlet and outlet connected to the outside are both arranged at the bottle mouth of the top serial filter element. Such an arrangement makes the filter element more simple and convenient when docking with the internal water channel of the water purifier, greatly improving the adaptability of the overall filter element and the water purifier, and also making it more convenient for users to replace the filter element.

[0028] (3) In a preferred embodiment, the bottom filter element includes a series filter element and a plugging cover. With such an arrangement, all accessories of the bottom filter element can be shared with the series sub-filter element. The bottom filter element can be formed by simply inserting a plugging cover at the tail of the series filter element, which greatly improves the commonality between the filter elements and reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 It is a structural cross-sectional view of a segmented combined composite filter element with water inlet and outlet at one end provided by an embodiment of the present invention;

[0031] Figure 2 This is an exploded view of the structure of a segmented combined composite filter element with water inlet and outlet at one end provided by an embodiment of the present invention;

[0032] Figure 3 is a structural cross-sectional view of a series-connected filter element provided by an embodiment of the present invention;

[0033] Figure 4 is a structural cross-sectional view of a serially connected filter element outer cylinder 1 provided by an embodiment of the present invention;

[0034] Figure 5 is a structural cross-sectional view of a bottom filter element provided in Embodiment 1 of the present invention;

[0035] Figure 6 is a cross-sectional view of a bottom filter element provided in Embodiment 2 of the present invention;

[0036] Figure 7 It is a schematic diagram of the structure of a full-flow filtration material assembly provided by an embodiment of the present invention;

[0037] In the figure: 100, series filter element; 200, bottom filter element; 1, filter material assembly; 2, outer cylinder one; 3, separation cylinder; 4, guide tower; 5, cylinder body; 6, lower end cover; 7, snap-in block; 8, drive block; 9, clamping cover; 10, spring; 11, plugging cover; 12, outer cylinder two; 101, stepped hole; 102, snap-in boss; 103, button hole; 801, inclined guide column; 701, inclined guide hole; L1, water inlet flow path; L2, water outlet flow path; K1, raw water inlet; K2, filtered water outlet. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0039] like Figure 1-2 As shown, the present invention provides a segmented combined composite filter element with water inlet and outlet at one end, comprising a bottom filter element 200 and more than one series filter element 100, the bottle mouths of the lower series filter elements 100 are sequentially inserted into the bottle mouths of the upper series filter elements 100 to form a whole, and the bottom filter element 200 is inserted into the bottle bottom of the adjacent series filter element 100; the water inlet and outlet of the segmented combined composite filter element with water inlet and outlet at one end connected to the outside are both arranged at the bottle mouth of the top series filter element 100, and the inside of the series filter element 100 There are water inlet flow path L1 and water outlet flow path L2 that are not connected to each other, and the water inlet flow paths L1 between two adjacent series-connected filter elements 100 are independently connected to each other, and the water outlet flow paths L2 are independently connected to each other. A filter material assembly 1 is provided on the water outlet flow path L2 of the series-connected filter element 100, and the bottom filter element 200 is provided with a water inlet flow path L1 and a water outlet flow path L2 that are connected to each other. The water inlet flow path L1 and the water outlet flow path L2 of the bottom filter element 200 are independently connected to the water inlet flow path L1 and the water outlet flow path L2 of the adjacent series-connected filter element 100.

[0040] like Figure 3-4As shown, the serial sub-filter element includes an outer tube 2, a separator tube 3 and a filter material assembly 1. The upper end of the outer tube 2 is provided with a protruding bottle mouth, and the lower end is provided with a stepped hole 101. The inner part of the outer tube 2 of the serial filter element 100 is provided with a separator tube 3, which divides the inner part of the outer tube 2 into two independent cavities. The filter material assembly 1 is installed inside the separator tube 3, and a seal is formed between the upper end outer wall of the filter material assembly 1 and the inner wall of the separator tube 3. The cavity between the separator tube 3 and the outer tube 2 forms the water inlet flow path L1 of the serial filter element 100, and the internal cavity of the separator tube 3 forms the water outlet flow path L2 of the serial filter element 100; the separator tube 3 includes a guide tower 4, a cylinder 5 and a lower end cover 6, and the guide tower 4 and the lower end cover 6 are respectively installed on both sides of the cylinder 5 with sealed covers on the circumferential walls. The guide tower 4 and the lower end cover 6 are both provided with through holes in the center for passing water. The upper end of the guide tower 4 of the separation cylinder 3 extends to the bottle mouth of the outer cylinder 2 to separate the bottle mouth into the raw water inlet K1 and the filtered water outlet K2 of the series filter element 100. Finally, the filtered water outlet K2 is formed at the upper end of the guide tower 4, and the raw water inlet K1 is formed between the guide tower 4 and the bottle mouth of the outer cylinder 2. The lower end of the lower end cover 6 of the separation cylinder 3 extends to the stepped hole 101 at the lower end of the outer cylinder 2; a clamping boss 102 is provided on the outer wall of the bottle mouth of the outer cylinder 2, and the stepped hole 101 of the outer cylinder 2 The outer hole of the filter element is equipped with a clamping block 7, and two clamping blocks 7 are symmetrically arranged, and can elastically extend and slide in the direction away from or close to the central axis of the filter element. The outer hole of the outer cylinder-2 stepped hole 101 is also equipped with a driving block 8 and a clamping cover 9. The outer wall of the stepped hole 101 of the serial filter element 100 is provided with a button hole 103, and the side of the driving block 8 is provided with a button and the bottom surface is provided with an inclined guide column 801. The driving block 8 is installed on the inner end surface of the outer hole of the stepped hole 101 and the button extends to the outer wall of the sub-filter element through the button hole 103. The side wall of the clamping block 7 is provided with a spring hole and the front is provided with an inclined guide hole 701. The two clamping blocks 7 are symmetrically installed in the horizontal direction. The springs installed in the spring holes are pressed on the inner wall of the clamping cover 9. The clamping cover 9 equipped with the clamping block 7 is pressed onto the driving block 8 as a whole, and the inclined guide column 801 of the driving block 8 is inserted into the inclined guide hole 701 of the slider. Fixedly docked with the bottom of the outer cylinder 2, the driving block 8 moves horizontally under the action of the key pressure, and drives the clamping block 7 to move away from the axis through the inclined guide column 801, and at the same time completes the reset of the slider under the action of the spring.

[0041] The structure of the bottom filter element 200 has the following implementation modes according to different application scenarios:

[0042] Embodiment 1:

[0043] like Figure 5As shown, in order to save production and manufacturing costs, the series filter element 100 and the bottom filter element 200 can share parts. In a preferred embodiment, the bottom filter element 200 can be assembled by the series filter element 100 and the plugging cover 11. The outer wall of the plugging cover 11 is provided with a snap-in boss 102. The plugging cover 11 is clamped in the stepped hole 101 of the outer cylinder 2 through the snap-in boss 102, and the outer wall of the plugging cover 11 is sealed with the inner wall of the inner hole of the stepped hole 101 to block the connection between the inside and the outside of the bottom filter element 200, while the through hole of the lower end cover 6 of the separation cylinder 3 is not sealed, so that the water inlet flow path L1 outside the separation cylinder 3 of the bottom filter element 200 is connected with the water outlet flow path L2 inside the separation cylinder 3; the bottom filter element 200 is arranged in this way, so that the series filter element 100 and the bottom filter element 200 can be shared, and the bottom filter element 200 only needs to add an additional plugging cover 11, which is more conducive to improving the convenience of production and saving production and manufacturing costs.

[0044] Embodiment 2:

[0045] like Figure 6 As shown, in order to make the structure of the bottom filter element 200 simpler, the bottom filter element 200 can also be independently arranged. In an optional embodiment, the bottom filter element 200 includes an outer cylinder 12, a filter material assembly 1 and a guide tower 4. The upper end of the outer cylinder 12 is provided with a protruding bottle mouth, and the lower end is sealed. The guide tower 4 is arranged on the outer cylinder 12. The inside of the bottle mouth is used to separate the bottle mouth into a raw water inlet K1 and a filtered water outlet K2 of the bottom filter element 200, and finally the filtered water outlet K2 is formed at the upper end of the guide tower 4, the raw water inlet K1 is formed between the guide tower 4 and the bottle mouth of the outer cylinder 12, the lower end of the guide tower 4 is sealed and connected with the upper end of the filter material assembly 1, the water inlet flow path L1 of the bottom filter element 200 is formed between the filter material assembly 1 and the outer cylinder 12, and the water outlet flow path L2 of the bottom filter element 200 is formed inside the filter material assembly 1, the water flow in the water inlet flow path L1 of the bottom filter element 200 can enter the water outlet flow path L2 of the bottom filter element 200 through the filter material filtration, and then flow out through the filtered water outlet K2 at the upper end of the guide tower 4; the bottom filter element 200 is arranged in this way, although it cannot be shared with the series filter element 100, but the structure is simple and saves a lot of additional components, such as the plugging cover 11, the separation cylinder 3 and the clamping block 7 structure at the bottom of the bottle, thereby reducing the component cost.

[0046] In the water purification industry, filter materials are divided into full-volume filtration and cross-flow filtration based on the form of filtration. The so-called full-volume filtration means that all the water molecules in the original liquid penetrate the filter material, and no concentrated liquid flows out. The water path is manifested in the form of an inlet waterway and an outlet waterway, such as activated carbon filter materials, granular carbon filter materials, carbon fiber filter materials, PP cotton filter materials or UF filter materials; while in cross-flow filtration, only a part of the water molecules penetrate the filter material during filtration, and the other part forms a concentrated liquid and is then discharged, such as a reverse osmosis membrane, a nanofiltration membrane, etc.; in all the above-mentioned embodiments of the present application, the filter material component 1 is a full-volume filtration filter material component 1, which can be any one of an activated carbon filter material component, a granular carbon filter material component, a composite carbon fiber filter material component, a PP cotton filter material component or a UF filter material component. These filter material components are all existing filter component products on the market, and their structures are no longer described in detail. The specific structures of various filter material components are as follows Figure 7 shown.

[0047] The following is a detailed description of the disassembly and filtration process of the segmented combined composite filter element with water inlet and outlet at one end provided in the embodiment of the present application:

[0048] When inserting the series filter elements 100 and the bottom filter element 200 into the series filter element 100, the clamping boss 102 of the bottle mouth of the lower filter element is clamped by the clamping block 7 of the upper filter element, so as to realize the clamping connection between the filter elements, so that all the series filter elements 100 and the bottom filter element 200 become a whole, and the filter elements are inserted into each other to form the following connection structure:

[0049] A seal is formed between the outer wall of the bottle mouth of the outer cylinder 12 of the lower-stage serial filter element 100 and the inner wall of the inner hole of the stepped hole 101 at the lower end of the outer cylinder 2 of the upper-stage serial filter element 100. The flow path guide upper end of the lower-stage serial filter element 100 is sealed and plugged with the lower end of the lower end cover 6 of the upper-stage serial filter element 100. According to the difference between the above two implementation methods adopted by the bottom filter element 200, a seal is finally formed between the outer cylinder 12 or the outer cylinder 2 of the bottom filter element 200 and the inner wall of the inner hole of the stepped hole 101 at the lower end of the outer cylinder 2 of the adjacent serial filter element 100. The flow path guide upper end of the bottom filter element 200 is sealed and plugged with the lower end of the lower end cover 6 of the adjacent serial filter element 100.

[0050] In this way, the water inlet L1 of the series filter element 100 is connected to its own raw water inlet K1 and the raw water inlet K1 of the adjacent series filter element 100, and the water outlet L2 of the series filter element 100 is connected to its own filtered water outlet K2 and the filtered water outlet K2 of the adjacent series filter element. The raw water inlet K1 is respectively connected to its own water inlet flow path L1 and the water inlet flow path L1 of the adjacent series-connected filter element 100, and the filtered water outlet K2 of the bottom filter element 200 is respectively connected to its own water outlet flow path L2 and the water outlet flow path L2 of the adjacent series-connected filter element 100, and finally the series connection of the water inlet flow paths L1 and the water outlet flow paths L2 between all the filter elements is achieved; the raw water flows in from the raw water inlet K1 of the topmost series-connected filter element 100, and flows into the bottom filter element 200 through the independently series-connected water inlet flow paths. Since the water inlet flow path L1 of the bottom filter element 200 is connected to the water outlet flow path L2 through water, the raw water enters the water outlet flow path L2 and is filtered step by step through the filter material assembly 1 of each filter element, and finally flows out from the filtered water outlet K2 of the topmost series-connected filter element 100;

[0051] When disassembling the filter elements, press the button corresponding to the filter element to be disassembled, and the driving block 8 moves horizontally under the action of the button pressure, and drives the clamping block 7 to move away from the axis through the inclined guide column 801, so that the clamping block 7 is disengaged from the blocking effect on the clamping boss 102, and the corresponding filter element can be directly pulled out, thereby realizing the disassembly between any series filter elements 100 or bottom filter elements 200.

[0052] In the description of the invention, unless otherwise specified, "plurality" means two or more than two; the directions or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "upper end", "lower end", "head", "tail", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance;

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0054] The above description is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Any modifications, equivalent substitutions and improvements made by any technician familiar with the technical field within the technical scope disclosed by the present invention and within the spirit and principle of the present invention should be covered by the protection scope of the present invention.

Claims

1. A segmented composite filter element with water inlet and outlet at one end, characterized in that: It comprises a bottom filter element and more than one series filter element, the bottle mouth of the lower series filter element is sequentially inserted into the bottle mouth of the upper series filter element to form a whole, and the bottom filter element is inserted into the bottle bottom of the adjacent series filter element; the water inlet and outlet of the segmented combined composite filter element for water inlet and outlet at one end and the water inlet and outlet connected to the outside are both arranged at the bottle mouth of the top series filter element; the interior of the series filter element is provided with an inlet flow path and an outlet flow path that are not connected to each other, and the inlet flow paths of two adjacent series filter elements are connected to each other, and the outlet flow paths are connected to each other, and a filter material component is arranged on the outlet flow path of the series filter element, and the bottom filter element An inlet flow path and an outlet flow path that are connected to each other are provided, and the inlet flow path and the outlet flow path of the bottom filter element are independently connected to the inlet flow path and the outlet flow path of the adjacent series filter element; the filter material assembly is a full-volume filtration filter material assembly; the series filter element comprises an outer cylinder one, the upper end of the outer cylinder one is provided with a protruding bottle mouth, the lower end is provided with a stepped hole, the outer wall of the protruding bottle mouth of the outer cylinder one is provided with a clamping boss, and the outer hole of the stepped hole of the outer cylinder one is installed with a clamping block; the interior of the outer cylinder one of the series filter element is provided with a separating cylinder to divide the interior of the outer cylinder one into two independent cavities, and the interior of the separating cylinder is provided with a filter material assembly.

2. The segmented combined composite filter element with water inlet and outlet at one end as claimed in claim 1, characterized in that: The water inlet ends of the series filter element and the bottom filter element are both provided with a raw water inlet and a filtered water outlet. The water inlet flow path of the series filter element is respectively connected to its own raw water inlet and the raw water inlet of the adjacent series filter element, and the water outlet flow path of the series filter element is respectively connected to its own filtered water outlet and the filtered water outlet of the adjacent series filter element; the raw water inlet of the bottom filter element is respectively connected to its own water inlet flow path and the water inlet flow path of the adjacent series filter element, and the filtered water outlet of the bottom filter element is respectively connected to its own water outlet flow path and the water outlet flow path of the adjacent series filter element.

3. The segmented combined composite filter element with water inlet and outlet at one end as claimed in claim 2, characterized in that: The two clamping blocks are symmetrically arranged and can elastically telescope and slide in a direction away from or close to the central axis of the filter element.

4. The segmented combined composite filter element with water inlet and outlet at one end as claimed in claim 2, characterized in that: The upper end of the separation cylinder extends to the bottle mouth of the outer cylinder to separate the bottle mouth into the raw water inlet and the filtered water outlet of the series filter element, and the lower end of the separation cylinder extends to the stepped hole at the lower end of the outer cylinder.

5. The segmented combined composite filter element with water inlet and outlet at one end as claimed in claim 2, characterized in that: The separation cylinder comprises a guide tower, a cylinder body and a lower end cover, and the guide tower and the lower end cover are respectively mounted on both ends of the cylinder body.

6. The segmented combined composite filter element with water inlet and outlet at one end as claimed in claim 2, characterized in that: The cavity between the separation cylinder and the outer cylinder forms a water inlet flow path of the series-connected filter element, and the interior of the separation cylinder forms a water outlet flow path of the series-connected filter element.

7. The segmented combined composite filter element with water inlet and outlet at one end as claimed in any one of claims 2 to 5, characterized in that: The bottom filter element includes a series filter element and a plugging cover, which are assembled by the series filter element and the plugging cover. The plugging cover is provided with a clamping boss on the outer wall. The plugging cover is clamped in the stepped hole of the outer tube one through a clamping block. The outer wall of the plugging cover is sealed with the inner wall of the inner hole of the stepped hole. The water inlet flow path of the bottom filter element is formed between the filter material assembly and the outer tube one, and the water outlet flow path of the bottom filter element is formed inside the filter material assembly.

8. The segmented combined composite filter element with water inlet and outlet at one end as claimed in claim 2, characterized in that: The bottom filter element includes an outer tube II, a filter material assembly and a guide tower. The upper end of the outer tube II is provided with a protruding bottle mouth, and the lower end is provided with a sealed bottle bottom. The filter material assembly is arranged inside the outer tube II, and the guide tower is arranged inside the bottle mouth of the outer tube II to separate the bottle mouth into a raw water inlet and a filtered water outlet of the bottom filter element; the upper end of the filter material assembly is sealed and connected to the lower end of the guide tower.

9. The segmented combined composite filter element with water inlet and outlet at one end as claimed in claim 8, characterized in that: A water inlet flow path of the bottom filter element is formed between the filter material assembly and the second outer cylinder, and a water outlet flow path of the bottom filter element is formed inside the filter material assembly. The water flow in the water inlet flow path of the bottom filter element can be filtered by the filter material and enter the water outlet flow path of the bottom filter element.

10. A water purification device, characterized in that: The water purification device is equipped with a segmented combined composite filter element with water inlet and outlet at one end as described in any one of claims 1-9.

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