WO2018129743A1 - Filter element assembly and water purifier provided with same - Google Patents

Abstract

A filter element assembly (100) and a water purifier provided with the same. The filter element assembly (100) comprises a filter housing (10), a joint (20), a seal cover (30), a filter element (40), a central tube (50), and a seal ring (80). A water inlet and a water outlet communicating with a filter chamber (10a) are formed in the joint (20). The seal cover (30) is disposed on the joint (20) and is located in the filter chamber (10a). The seal cover (30) comprises a joint tube (31), a supporting plate (32), a first baffle plate (33), and a second baffle plate (34). The outer end of the joint tube (31) is connected to the joint (20). The supporting plate (32) is disposed outside the inner end of the joint tube (31). The first baffle plate (33) and second baffle plate (34) are respectively disposed on the supporting plate (32). The filter element (40) is clipped between the first baffle plate (33) and the second baffle plate (34). The central tube (50) is plugged in the joint tube (31) and communicates with the water outlet. The seal ring (80) is disposed on the central tube (50) and is sealedly connected the central tube (50) and the joint (20).

Description

Filter element and water purifier with same Technical field

The present invention relates to the field of water purification equipment, and more particularly to a filter element assembly and a water purifier having the same.

Background technique

At present, the filter element is widely used in water purification equipment, and the filter element can effectively filter out impurities in the water and achieve bactericidal action, and it is essential to ensure that the water path inside the filter element does not generate string water in the filter design, however, in the related art In the actual manufacturing process, due to the abnormality of the injection molding materials and the structural design defects, it is easy to cause deviations in the matching dimensions, which in turn affects the sealing effect between the components, resulting in a string of water problems between the raw water and the purified water, which seriously affects user experience.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

To this end, the present invention proposes a filter element assembly which has a simple structure, good sealing performance, high production efficiency, and good user experience.

The invention also proposes a water purifier having the above-described filter element assembly.

A filter element assembly according to an embodiment of the first aspect of the present invention includes: a filter housing, a joint, a cover, a filter element, a center tube and a sealing ring, wherein the filter housing defines a filter chamber, and the joint is disposed on the filter housing The joint is provided with a water inlet and a water outlet communicating with the filter chamber, the cover is disposed on the joint and located in the filter chamber, and the cover comprises: a joint tube, the joint tube Forming a tubular shape extending along an axial direction of the filter housing, an outer end of the joint pipe is connected to the joint; a support plate disposed outside the inner end of the joint pipe and along the filter casing Radially extending outwardly; a first partition and a second partition, the first partition and the second partition being respectively disposed on the support plate and extending toward the filter housing, the first a partition plate and the second partition plate are respectively formed into a ring shape extending along a circumferential direction of the filter case, and the filter element is disposed in the filter cavity and is engaged with the first partition plate and the second block Between the partitions, the center tube is inserted into the joint pipe and communicates with the water outlet, and the seal ring is sleeved And the upper central tube sealingly connected to the central tube and the fitting.

According to the filter element assembly of the embodiment of the invention, by sealing the central tube with a sealing ring, the sealing ring is sealed with the outer wall of the central tube and the inner wall of the joint, thereby ensuring the sealing of the water passage, thereby avoiding the outer wall of the central tube and the inner wall of the joint. There is a gap between them to cause water shattering, which effectively enhances the sealability inside the filter element assembly, reduces the structural dimensional accuracy requirements, and improves production efficiency. Therefore, the filter element assembly has a simple structure, good sealing performance, high production efficiency, and good user experience.

In addition, the filter element assembly according to the embodiment of the present invention may further have the following additional technical features:

According to an embodiment of the present invention, the inner wall of the joint is provided with a groove recessed inward, and the seal ring is disposed at the Inside the groove.

According to an embodiment of the invention, the cartridge assembly further includes: a limiting core, the limiting core being disposed in the joint and at least a portion extending into the groove to press the sealing ring into the Inside the groove.

According to an embodiment of the invention, the limit core is ultrasonically welded to the joint.

According to an embodiment of the invention, the central tube is in an interference fit with the joint tube.

According to an embodiment of the invention, the water inlet is provided at an outer circumference of the joint pipe.

According to an embodiment of the present invention, the first partition plate is disposed coaxially with the second partition plate and the first partition plate is located at an outer circumference of the second partition plate, and a cross section of the filter element is formed into a ring shape. The inner wall surface of the filter element has an interference fit with the outer wall surface of the second partition plate, and the outer wall surface of the filter element has an interference fit with the inner wall surface of the first partition plate.

According to an embodiment of the invention, the axial height of the first partition is smaller than the axial height of the second partition.

According to an embodiment of the invention, the closure is an integrally formed piece.

A water purifier according to an embodiment of the second aspect of the present invention includes the filter element assembly described in the above embodiments.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

1 is a schematic structural view of a filter element assembly according to an embodiment of the present invention;

Figure 2 is an enlarged view of a portion A shown in Figure 1;

Figure 3 is a bottom plan view of a joint of a cartridge assembly in accordance with an embodiment of the present invention;

Figure 4 is a cross-sectional view taken along line B-B of Figure 3;

Fig. 5 is a schematic view showing still another structure of a filter element assembly according to an embodiment of the present invention.

Reference mark:

100: filter element assembly;

10: filter housing; 10a: filter chamber; 11: filter shell support rib;

20: joint; 21: groove;

30: cover;

31: joint pipe; 32: support plate; 33: first partition; 34: second partition; 35: support rib;

40: filter element;

50: center tube;

60: water stop rubber pad; 61: connecting portion; 62: movable portion;

70: limit core head; 71: upper boss; 72: lower boss;

80: Sealing ring.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

The filter cartridge assembly 100 according to the embodiment of the first aspect of the present invention will be specifically described below with reference to FIGS. 1 through 5.

The cartridge assembly 100 in accordance with an embodiment of the present invention includes a filter housing 10, a joint 20, a closure 30, a filter cartridge 40, a center tube 50, and a seal ring 80. Specifically, the filter housing 10 defines a filter chamber 10a. The joint 20 is disposed on the filter housing 10. The joint 20 is provided with a water inlet and a water outlet communicating with the filter chamber 10a. The cover 30 is disposed on the joint 20 and located at Filter chamber 10a.

The cover 30 includes: a joint pipe 31, a support plate 32, a first partition plate 33, and a second partition plate 34. The joint pipe 31 is formed in a tubular shape extending along the axial direction of the filter casing 10, and the outer end of the joint pipe 31 is The joints 20 are connected, the support plate 32 is disposed outside the inner end of the joint pipe 31 and extends outward in the radial direction of the filter casing 10, and the first partition plate 33 and the second partition plate 34 are respectively disposed on the support plate 32 and facing the filter casing The inner partition 10 and the second partition 34 are respectively formed into a ring shape extending along the circumferential direction of the filter housing 10, and the filter element 40 is disposed in the filter chamber 10a and is engaged with the first partition 33 and the second partition. Between the plates 34, the central tube 50 is inserted into the joint tube 31 and communicates with the water outlet, and the sealing sleeve 80 is disposed on the central tube 50 and is sealingly connected to the central tube 50 and the joint 20, respectively.

In other words, the filter element assembly 100 is mainly composed of the filter housing 10, the joint 20, the cover 30, the filter element 40, the center tube 50 and the sealing ring 80. The inside of the filter housing 10 defines a filter chamber 10a with one end open, and the joint 20 is arranged in the filter. The casing 10 is connected to the open end of the filter casing 10 to close the opening of the filter chamber 10a, and the joint 20 extends in the vertical direction (up and down direction as shown in Fig. 1) at one end of the joint 20 (as shown in Fig. 1). The lower end has a water inlet and a water outlet communicating with the filter chamber 10a, the upper end of the joint 20 is connected to the filter housing 10, the cover 30, the filter element 40 and the central tube 50 are located in the filter chamber 10a, and the central tube 50 is disposed in the filter In the central position of the cavity 10a, the central tube 50 extends along the central axis of the filter housing 10, and the lower end of the central tube 50 is inserted into the joint 20 and communicates with the water outlet on the joint 20, and the upper end of the central tube 50 can pass through the filter element. The support ribs 11 are supported (as shown in FIG. 5) to facilitate the flow of purified water through the center tube 50.

The cover 30 is mainly composed of a joint pipe 31, a support plate 32, a first partition plate 33, and a second partition plate 34. The joint pipe 31 is arranged in a tubular shape along the axial direction of the filter casing 10, and the joint pipe 31 is disposed at the joint 20 The inner side is connected to the joint 20, the support plate 32 is disposed in the filter chamber 10a and adjacent to the inner end of the joint 20, and the support plate 32 extends outward in the radial direction of the filter housing 10, along the radial direction of the support plate 32. The first partition plate 33 and the second partition plate 34 are disposed at intervals, that is, the first partition plate 33 and the second partition plate 34 are spaced apart in the radial direction of the support plate 32. Specifically, the first partition plate 33 is located at the support plate. The outer periphery of the second partition plate 34 is located inside the support plate 32, and the first partition plate 33 and the second partition plate 34 are respectively arranged in a ring shape along the circumferential direction of the filter housing 10.

Further, the filter element 40 is formed substantially in the shape of a ring cylinder and is disposed in the filter chamber 10a. The inner diameter of the ring-shaped filter element 40 and the The radial dimensions of the two partitions 34 are substantially equal, and the outer diameter of the annular cylindrical filter element 40 is substantially equal to the radial dimension of the first partition plate 33, so that the filter element 40 is snapped onto the first partition plate 33 and the second partition plate 34. Between the filter elements 40, the fixed connection of the filter element 40 is realized to avoid the phenomenon of water leakage.

Moreover, the sealing ring 80 is formed substantially in an annular structure, and the sealing ring 80 is sleeved on the central tube 50. The sealing ring 80 is sealingly connected with the central tube 50 and the joint 20, that is, the inner wall of the sealing ring 80 and the central tube 50. Between the outer walls, the outer wall of the sealing ring 80 and the inner wall of the joint 20 are sealed and connected, thereby avoiding the phenomenon of water leakage between the outer wall of the central pipe and the inner wall of the joint.

When the filter element assembly 100 is in operation, the water flow enters the filter chamber 10a from the water inlet on the joint 20, passes through the outside of the cover 30 to the filter element 40, continues to flow upward through the filtering action of the filter element 40, and is then filtered again through the upper portion of the filter element assembly 100. Thereafter, the upper end of the central tube 50 enters the central tube 50, flows along the central tube 50 to the water outlet, and the filtered water after a plurality of filtrations finally flows out of the filter element assembly 100 for use by the user.

Therefore, according to the filter element assembly of the embodiment of the present invention, the sealing ring 80 is sleeved on the central tube 50, and the sealing ring 80 is sealedly connected with the outer wall of the central tube 50 and the inner wall of the joint, thereby ensuring the sealing of the water passage, thereby avoiding A gap is left between the outer wall of the center tube 50 and the inner wall of the joint 20 to cause water leakage, which effectively enhances the sealing property inside the filter element assembly 100, reduces structural dimensional accuracy requirements, and improves production efficiency. Therefore, the filter element assembly 100 has a simple structure, good sealing performance, high production efficiency, and good user experience.

Advantageously, the cartridge assembly 100 further includes a water stop pad 60 and a support rib 35 movably disposed on the joint tube 31 to open and close the water inlet, the water stop pad 60 being configured to enter the water inlet When the water is opened, the water inlet is opened and the water inlet is closed when the water inlet is not filled, and the support rib 35 is provided at the upper end surface of the support plate 32.

Referring to FIGS. 1 and 2, the water stop pad 60 extends in the axial direction (up and down direction as shown in FIG. 1), and the water stop pad 60 is coaxially sleeved on the outer side of the joint pipe 31, and passes through the water stop pad 60. The cooperation with the joint 20 realizes opening or automatically closing the water inlet, thereby ensuring the water inlet of the filter element assembly 100, and avoiding the safety of the water flow flowing back through the water inlet when the water inlet is stopped.

Alternatively, the cross-sectional shape of the support ribs 35 may be formed in a triangular shape, and the support ribs 35 are located between the first partition plate 33 and the second partition plate 34, and the filter element 40 is engaged with the first partition plate 33 and the second partition plate 34, the lower end surface of the filter element 40 is in contact with the upper end surface of the support plate 32, the lower end surface of the filter element 40 is abutted against the support rib 35, and the top of the support rib 35 is embedded in the end surface of the filter element 40, so that the support plate 32 and the filter element can be ensured. The sealing between the 40 and the connection reliability prevent the occurrence of water in the filter element assembly 100.

The water stop pad 60 includes a connecting portion 61 and a movable portion 62. The connecting portion 61 is sleeved on the joint tube 31, and the movable portion 62 is movably connected with the connecting portion 61. The movable portion 62 is squeezed when the water inlet is filled with water. Press to open the water inlet and return and close the water inlet when the water inlet does not enter the water.

Referring to FIG. 2, the water stop pad 60 is mainly composed of a connecting portion 61 and a movable portion 62, and the connecting portion 61 is sleeved on the joint tube 31. In other words, the connecting portion 61 is disposed coaxially with the joint pipe 31, and the connecting portion 61 is provided on the outer peripheral side of the joint pipe 31, and the movable portion 62 is formed substantially in an annular body extending in the radial direction, and the annular body movable portion The inner wall surface of the 62 (i.e., the side adjacent to the joint pipe 31) is movably connected to the joint portion 61, and the outer wall surface of the movable portion 62 (i.e., the side away from the joint pipe 31) is abutted against the inner wall of the joint 20.

When the water flow flows into the filter chamber 10a from the water inlet on the joint 20, the water stop pad 60 is deformed under the pressure of the water flow, thereby connecting the filter chamber 10a and the water inlet, so that the water flow can flow into the inside of the filter chamber 10a, and then is sealed. The outer side of the cover 30 reaches the filter element 40, and continues to flow upward through the filtering action of the filter element 40. Finally, the filtered water passes through the upper end of the central tube 50 into the central tube 50, flows along the central tube 50 to the water outlet, and is filtered. The purified water finally flows out of the filter element assembly 100 for use by the user.

When the water flow stops flowing, the water stop pad 60 recovers and deforms, thereby closing the water inlet, thereby blocking the passage of the water flow through the water inlet and the outside, effectively preventing the water flow from flowing back through the water inlet to the filter element assembly 100, Come to security risks and reduce the user experience.

The inner wall of the joint 20 is provided with a recess 21 recessed inwardly, and a seal ring 80 is disposed in the recess 21.

Specifically, as shown in FIGS. 1 and 2, a portion of the inner wall surface of the joint 20 adjacent to the center tube 50 is recessed in the radial direction, thereby defining a groove 21 with the outer wall of the center tube 50, and the radial dimension of the groove 21 ( That is, the dimension between the outer wall surface of the center tube 50 and the inner wall surface of the recess of the joint 20 is not larger than the size of the seal ring 80, so that the seal ring 80 can be fastened in the groove 21, and the sealing effect is achieved, avoiding the center tube 50. A gap is left between the joint 20 and the water is generated.

Optionally, the limit core 70 is disposed within the joint 20 and at least a portion extends into the recess 21 to press the seal ring 80 into the recess 21.

Specifically, as shown in FIGS. 1 and 2, the limiting core 70 substantially forms an inverted circular boss extending in the axial direction (up and down direction as shown in FIG. 1), and the lower boss 72 of the limiting core 70 is formed. The outer diameter is smaller than the outer diameter of the upper boss 71 of the limiting core 70, and the lower boss 72 is formed substantially in a cylindrical shape, and the inner wall surface of the lower boss 72 has a radial dimension greater than or equal to the outer diameter of the center tube 50. Dimensions, the radial dimension of the outer wall surface of the lower boss 72 is less than or equal to the radial dimension of the inner wall surface of the groove 21 of the joint 20, and is assembled when the filter housing 10 is assembled with the joint 20, the seal cover 30, the filter element 40, the center tube 50, and the like. When the limiting core 70 is pushed against the joint pipe 31 of the sealing cover 30, the lower end surface of the upper boss 71 is abutted in the joint 20 and adjacent to the inner wall surface of the groove 21, and the upper end surface abuts against the joint of the sealing cover 30. The lower end surface of the tube 31 is then pressed into the recess 21 by the cooperation of the limiting core 70 with the central tube 50, the joint 20 and the cover 30, thereby further limiting the seal 80 relative to the center. The degree of freedom of the tube 50, and the limiting core 70 can also serve to reduce the gap between the inner wall surface of the joint 20 and the outer wall surface of the center tube 50. Further string of water may be avoided.

Preferably, the limiting core 70 is ultrasonically welded to the joint 20, specifically, a stepped surface is formed between the upper boss 71 and the lower boss 72 of the limiting core 70. When the limiting core 70 is assembled with the joint 20, firstly The lower boss 72 of the limit core 70 extends into the recess 21 of the joint 20, during which the lower boss 72 of the limit core 70 gradually pushes the seal ring 80 into the recess 21. When the step surface and the joint 20 are stopped, the limit core 70 is finally fixed on the joint 20 by ultrasonic welding to ensure the fixed connection of the two, and the position of the seal ring 80 is defined to avoid sealing. The ring 80 is disengaged from the groove 21. Thereby, the limiting core 70 is fixed on the joint 20 by means of ultrasonic welding, thereby increasing the joint strength between the two, improving the assembly efficiency, reducing the energy consumption, and further reducing the manufacturing cost.

The central tube 50 is interference-fitted with the joint tube 31.

Referring to Fig. 2, the center tube 50 extends in the axial direction and is inserted into the joint pipe 31. The outer wall surface of the center pipe 50 is interference-fitted with the inner wall surface of the lower end of the joint pipe 31, that is, the outer diameter of the center pipe 50. Slightly larger than the radial dimension at the opening of the lower end surface of the structural tube 31, thereby ensuring the tightness of the joint by the interference fit of the two, effectively avoiding the gap between the central tube 50 and the opening of the joint tube 31. Water phenomenon.

Alternatively, the water inlet is provided at the outer circumference of the joint pipe 31.

Specifically, as shown in FIG. 1, the water inlet is provided on the outer circumference of the joint pipe 31, so that interference with the joint pipe 31 can be avoided, and the structure of the filter element assembly 100 can be simplified. Of course, the number of water inlets can be set according to actual design requirements. Adjustments are made to ensure filtration efficiency and filtration uniformity of the filter element assembly 100.

As shown in FIG. 1, the first partition plate 33 is disposed coaxially with the second partition plate 34 and the first partition plate 33 is located at the outer periphery of the second partition plate 34, and the cross section of the filter element 40 is formed in a ring shape.

That is, the first partition plate 33 coincides with the central axis of the second partition plate 34, and the first partition plate 33 is located outside the second partition plate 34 in the radial direction of the filter housing 10, and the cross section of the filter element 40 is annular. Arrangement, that is, the filter element 40 is formed along the circumferential direction of the filter housing 10 as an annular cylinder extending in the vertical direction, and water entering the filter chamber 10a passes through the filter core 40 from the outside to the inside along the radial direction of the filter housing 10, thereby Filter the water to filter out impurities in the water.

Advantageously, the inner wall surface of the filter element 40 is interference-fitted with the outer wall surface of the second diaphragm 34, and the outer wall surface of the filter element 40 is interference-fitted with the inner wall surface of the first diaphragm 33. That is, the radial dimension of the inner wall of the filter element 40 is smaller than the radial dimension of the outer wall of the second partition plate 34, and the radial dimension of the outer wall of the filter element 40 is larger than the radial dimension of the inner wall of the first partition plate 33, through the inner wall surface of the filter element 40 and The outer wall surface of the second partition plate 34 is interference fit, and the outer wall surface of the filter element 40 is interference fit with the inner wall surface of the first partition plate 33. The structure of the filter element 40 and the second partition plate 34 is simple, and the processing process is convenient, and The sealing between the inner wall surface of the filter element 40 and the outer wall surface of the second partition plate 34, the outer wall surface and the inner wall surface of the first partition plate 33 is effectively ensured, and the filter element 40 and the second partition plate 34 and the first partition plate 33 are prevented. There is a gap between them to prevent water from collapsing.

The axial height of the first partition plate 33 is smaller than the axial height of the second partition plate 34.

Specifically, as shown in FIG. 1, the height of the second partition plate 34 in the axial direction of the filter element 40 is greater than the height of the first partition plate 33 in the axial direction of the filter element 40, so that not only the second partition plate 34 but also the second partition plate 34 can be enlarged. The interference fit area of the inner wall surface of the filter element 40 ensures an effective sealing between the outer wall of the second partition plate 34 and the inner wall of the filter element 40, and is also advantageous for the filter element 40 to be firmly engaged in the cover 30 to ensure the structure. Stability, the connection is very reliable.

Preferably, the cover 30 is an integrally formed piece, whereby the integrally formed structure not only ensures the filter cartridge assembly 100 The structure and the performance stability are convenient for molding and manufacturing, and the redundant fittings and the connecting process are omitted, the assembly efficiency of the filter element assembly 100 is greatly improved, the connection reliability of the filter element assembly 100 is ensured, and further, the integrated structure is formed. The overall strength and stability of the structure is high, assembly is more convenient, and the life is longer.

The water purifier (not shown) according to the second aspect of the present invention includes the filter element assembly 100 of the above embodiment, and since the filter element assembly 100 according to the above embodiment of the present invention has the above-described technical effects, the net according to the embodiment of the present invention The water device also has the corresponding technical effect, that is, the structure of the water purifier is simple and compact, the components are connected reliably, the assembly and disassembly is convenient, the sealing performance is good, the production efficiency is high, water leakage and water stringing problems do not occur, and the performance is high, the user Experience is good.

Specifically, by sealing the sealing ring 80 on the central tube 50 of the filter element assembly 100 of the water purifier, a sealing space is formed between the outer wall of the central tube 50 and the inner wall of the joint by the sealing ring 80, thereby avoiding the outer wall of the central tube 50 and the joint 20 A gap is formed between the inner walls to cause water shattering, the quality of the water purifier is improved, and the central tube 50 is interference-fitted with the joint tube 31 to further avoid the occurrence of water in the filter element assembly 100, thereby effectively reinforcing the filter element assembly 100. The internal sealing property reduces the structural dimensional accuracy requirements and improves the production efficiency of the water purifier.

Other configurations and operations of the cartridge assembly 100 and the water purifier having the same according to embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be in either or Combinations are made in a suitable manner in various embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims (10)

A filter cartridge assembly, comprising: a filter housing, wherein the filter housing defines a filter chamber; a joint, the joint is disposed on the filter housing, and the joint is provided with a water inlet and a water outlet communicating with the filter chamber; a cover, the cover is disposed on the joint and located in the filter cavity, and the cover comprises: a joint pipe formed as a tubular shape extending in an axial direction of the filter casing, the outer end of the joint pipe being connected to the joint; a support plate disposed outside the inner end of the joint tube and extending outward in a radial direction of the filter housing; a first partition and a second partition, wherein the first partition and the second partition are respectively disposed on the support plate and extend toward the filter housing, the first partition and the first partition The two partitions are respectively formed into a ring shape extending along the circumferential direction of the filter housing; a filter element, the filter element is disposed in the filter chamber and is caught between the first partition plate and the second partition plate; a central tube, the central tube being inserted into the joint tube and communicating with the water outlet; a sealing ring sleeved on the central tube and sealingly connected to the central tube and the joint, respectively. The cartridge assembly according to claim 1, wherein the inner wall of the joint is provided with an inwardly recessed recess, and the seal ring is disposed in the recess. The cartridge assembly of claim 2, further comprising: a limiting core, the limiting core being disposed within the joint and at least a portion extending into the recess to press the sealing ring Advancing into the groove. The cartridge assembly of claim 3 wherein said limit core is ultrasonically welded to said joint. A cartridge assembly according to any one of claims 1 to 4, wherein the central tube is in an interference fit with the joint tube. A cartridge assembly according to any one of claims 1 to 5, wherein the water inlet is provided at an outer circumference of the joint pipe. The filter cartridge assembly according to any one of claims 1 to 6, wherein the first partition plate is disposed coaxially with the second partition plate and the first partition plate is located at the second partition plate a cross section of the filter element is formed in a ring shape, an inner wall surface of the filter element is interference fit with an outer wall surface of the second partition plate, and an outer wall surface of the filter element is interference-fitted with an inner wall surface of the first partition plate . A cartridge assembly according to any one of claims 1 to 7, wherein the first spacer has an axial height that is less than an axial height of the second spacer. A cartridge assembly according to any one of claims 1-8, wherein the closure is an integrally formed piece. A water purifier comprising the filter cartridge assembly of any of claims 1-9.

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