CN108295541B

CN108295541B - Filtering component, composite filter element and water treatment equipment with same

Info

Publication number: CN108295541B
Application number: CN201810396091.3A
Authority: CN
Inventors: 郑跃东; 蔡雪刚; 桂鹏; 彭晶; 廖榆敏
Original assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Priority date: 2018-04-27
Filing date: 2018-04-27
Publication date: 2023-10-24
Anticipated expiration: 2038-04-27
Also published as: CN108295541A

Abstract

The invention discloses a filter component, a composite filter element and water treatment equipment with the same, wherein the filter component comprises: the filter cartridge, form first filtration runner and the second filtration runner of mutual isolation in the filter cartridge, wherein, be equipped with in the filter cartridge and be used for filtering the first filter piece of fluid in the first filtration runner, and be used for filtering the second filter piece of fluid in the second filtration runner, the second filter piece includes first stage filter medium and second stage filter medium, wherein, the second stage filter medium is located and is close to the one end of first filter piece, the length L1 of first stage filter medium with the length L2 of second stage filter medium satisfies: L2/L1 is more than or equal to 0.5 and less than or equal to 1. The filter assembly provided by the invention has the advantages of simple and compact structure and good filter effect.

Description

Filtering component, composite filter element and water treatment equipment with same

Technical Field

The invention relates to the technical field of water treatment equipment, in particular to a filter assembly, a composite filter element and water treatment equipment with the same.

Background

In order to improve the filtering effect, the water treatment equipment in the related art is provided with a plurality of filter cores, the filter cores are connected through pipelines, the pipeline layout is complex, the structure is not compact, the occupied space is large, the size is large, and the disassembly and the assembly are inconvenient.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides the filter assembly which is compact in structure, small in occupied space, convenient to assemble and disassemble and good in filter effect.

The invention also discloses water treatment equipment with the filtering component.

The filter assembly according to the present invention comprises: the filter cartridge, form first filtration runner and the second filtration runner of mutual isolation in the filter cartridge, wherein, be equipped with in the filter cartridge and be used for filtering the first filter piece of fluid in the first filtration runner, and be used for filtering the second filter piece of fluid in the second filtration runner, the second filter piece includes first stage filter medium and second stage filter medium, wherein, the second stage filter medium is located and is close to the one end of first filter piece, the length L1 of first stage filter medium with the length L2 of second stage filter medium satisfies: L2/L1 is more than or equal to 0.5 and less than or equal to 1.

The filter assembly provided by the invention has the advantages of simple and compact structure, reduced occupied space, contribution to reasonable layout, reduced disassembly and assembly difficulty, maintenance cost saving and good filter effect.

According to some embodiments of the invention, the filter cartridge comprises: a first filter cartridge having a first filter cavity defined therein; the first filter element is arranged in the first filter cavity; the second filter cartridge is arranged at one axial end of the first filter cartridge, a second filter cavity is defined in the second filter cartridge, and the second filter element is arranged in the second filter cavity; the isolation assembly is connected with the first filter cartridge and the second filter cartridge respectively and is used for isolating the first filtering flow passage and the second filtering flow passage.

Optionally, the isolation assembly includes: a septum connected between the first filter cartridge and the second filter cartridge and separating the first filter chamber and the second filter chamber; the central tube is arranged in the first filter cavity, one end of the central tube is connected with the middle partition plate, the other end of the central tube penetrates out of the first filter cylinder, a first tube water passing channel communicated with the second filter cavity is formed in the central tube, and the first tube water passing channel is mutually isolated from the first filter cavity.

Optionally, the first pipe water passing channel is communicated with the second filter cavity through a partition water passing hole arranged on the partition.

Further, a positioning support table is arranged in the water hole of the separation disc, and one end of the central tube is stopped against the positioning support table.

Optionally, the middle separation disc is provided with a positioning rib which surrounds the water passing holes of the middle separation disc and extends towards the first filter cavity along the axial direction of the filter cylinder, and the central tube is inserted into the positioning rib.

Further, one of the positioning ribs and the central tube is provided with an accommodating groove, and a sealing ring for sealing a gap between the central tube and the middle partition plate is arranged in the accommodating groove.

Optionally, the filter assembly further comprises: the bottom cover is arranged on the second filter cylinder and is provided with a bottom cover water passing hole communicated with the second filter cavity.

Optionally, the bottom cover water through hole is arranged in the middle of the bottom cover.

Optionally, the bottom cover water passing holes comprise a plurality of bottom cover water passing holes which are distributed at intervals.

According to the water treatment equipment provided by the invention, the filter element assembly is arranged, so that the filtering effect can be improved, the volume can be reduced, and more installation requirements can be met.

The invention also discloses a composite filter element and water treatment equipment with the composite filter element.

The composite filter element according to the invention comprises: the filter comprises a filter shell and a filter cartridge, wherein an installation cavity is defined in the filter shell; the filter cartridge is arranged in the mounting cavity and forms a first filtering flow passage and a second filtering flow passage which are mutually isolated from the filter shell, wherein a first filtering piece used for filtering fluid in the first filtering flow passage and a second filtering piece used for filtering fluid in the second filtering flow passage are arranged in the filter cartridge, the second filtering piece comprises a first-stage filtering material and a second-stage filtering material, the second-stage filtering material is positioned at one end of the first filtering piece, in the direction of water flow, the second-stage filtering material is positioned at the downstream of the first-stage filtering material, and in the axial direction of the filter shell, the length L1 of the first-stage filtering material and the length L2 of the second-stage filtering material meet the following conditions: L2/L1 is more than or equal to 0.5 and less than or equal to 1.

The composite filter element provided by the invention has the advantages of simple and compact structure, reduced occupied space, contribution to reasonable layout, reduced disassembly and assembly difficulty, maintenance cost saving and good filtering effect.

According to some embodiments of the invention, the outer wall surface of the filter cartridge is spaced apart from the inner wall surface of the filter housing to form a water gap.

Optionally, the minimum inner diameter of the filter shell is D1, the maximum outer diameter of the filter cartridge is D2, and D1 and D2 satisfy the following conditions: D1-D2 is more than or equal to 0.5mm.

According to some embodiments of the invention, the filter cartridge comprises a first filter cartridge disposed within the mounting cavity and a second filter cartridge, the first filter cartridge defining a first filter cavity therein; the first filter element is arranged in the first filter cavity; the second filter cartridge is provided in the mounting cavity, a second filter cavity is defined in the second filter cartridge, the second filter element is mounted in the second filter cavity, and the composite filter element further comprises: a septum connected between the first filter cartridge and the second filter cartridge and separating the first filter chamber and the second filter chamber; the central tube is arranged in the first filter cavity, one end of the central tube is connected with the middle partition plate, the other end of the central tube penetrates out of the first filter cylinder, a first tube water passing channel communicated with the second filter cavity is formed in the central tube, and the first tube water passing channel is mutually isolated from the first filter cavity.

Optionally, the minimum inner diameter d of the first pipe water passage satisfies: d is more than or equal to 3mm.

Optionally, the second filter comprises at least two stages of filter media distributed along the axial direction of the filter cartridge.

Further, the second filter element comprises a first-stage filter material in a cylindrical shape and a second-stage filter material in a cylindrical shape, the second-stage filter material is arranged at one end of the first filter element adjacent to the first filter element, and the first-stage filter material and the second-stage filter material are separated by a separation plate.

Optionally, the outer wall surface of the filter cartridge is spaced from the inner wall surface of the filter shell to form a water gap, and the second filter cavity is communicated with the water gap.

Further, the first-stage filter material is internally provided with a first filter material water channel, the second-stage filter material is internally provided with a second filter material water channel, the first filter material water channel is communicated with the water passing gap, and the second filter material water channel is communicated with the first pipe water passing channel.

The water treatment equipment comprises a waterway plate and a filter element, wherein a filter element connecting seat is arranged on the waterway plate; the filter element is the composite filter element, and the composite filter element is detachably connected to the filter element connecting seat.

According to the water treatment equipment disclosed by the invention, the filtering effect can be improved, the volume can be reduced, and more installation requirements can be met.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a perspective view of a filter cartridge assembly according to an embodiment of the present invention;

FIG. 2 is an exploded view of a filter cartridge assembly according to an embodiment of the present invention;

FIG. 3 is a front view of a filter cartridge assembly according to an embodiment of the present invention;

FIG. 4 is a cross-sectional view of a filter cartridge assembly according to one embodiment of the invention;

fig. 5 is an enlarged view of a portion a circled in fig. 4;

FIG. 6 is a cross-sectional view of a composite filter cartridge according to one embodiment of the invention;

FIG. 7 is an enlarged view of B, circled in FIG. 6;

FIG. 8 is an enlarged view of C, circled in FIG. 6;

FIG. 9 is an enlarged view of D, circled in FIG. 6;

fig. 10 is a perspective view of a waterway plate according to an embodiment of the present invention;

fig. 11 is a side view of the waterway plate of fig. 10;

fig. 12 is a bottom view of the waterway plate of fig. 10;

fig. 13 is a cross-sectional view of the waterway plate of fig. 10;

FIG. 14 is a perspective view of a filter housing in a composite cartridge according to an embodiment of the invention;

Fig. 15 is a bottom view of the filter housing of fig. 14;

FIG. 16 is a side view of the filter housing of FIG. 14;

FIG. 17 is a cross-sectional view taken along line E-E of FIG. 16;

fig. 18 is an enlarged view of the F portion circled in fig. 17;

FIG. 19 is a perspective view of a first cartridge in a composite cartridge according to an embodiment of the present disclosure;

FIG. 20 is a top view of the first filter cartridge of FIG. 19;

FIG. 21 is a side view of a first cartridge in a composite cartridge;

FIG. 22 is a cross-sectional view taken along line G-G of FIG. 21;

FIG. 23 is a perspective view of a top cap in a composite cartridge according to an embodiment of the present invention;

FIG. 24 is a top plan view of the overcap of FIG. 23;

FIG. 25 is a side view of the top cover of FIG. 23;

FIG. 26 is a perspective view of a second cartridge in a composite cartridge according to some embodiments of the present disclosure;

FIG. 27 is a side view of the second filter cartridge of FIG. 26;

FIG. 28 is a top view of the second cartridge of FIG. 26;

fig. 29 to a sectional view taken along the line H-H in fig. 28;

FIG. 30 is an enlarged view of section I circled in FIG. 29;

FIG. 31 is a cross-sectional view of a second cartridge in a composite filter cartridge according to further embodiments of the invention;

FIG. 32 is a perspective view of a bottom cap in a composite cartridge according to an embodiment of the present invention;

fig. 33 is a side view of the bottom cover of fig. 32;

fig. 34 is a top view of the bottom cover of fig. 32;

FIG. 35 is a cross-sectional view taken along line J-J of FIG. 34;

FIG. 36 is a perspective view of a midplate of a composite filter cartridge according to an embodiment of the invention;

FIG. 37 is a side view of the midplane of FIG. 36;

FIG. 38 is a top view of a midplate of the composite filter element;

FIG. 39 is a cross-sectional view taken along line K-K of FIG. 38;

FIG. 40 is a perspective view of a center tube of a composite cartridge according to an embodiment of the present invention;

FIG. 41 is a side view of the center tube of FIG. 40;

FIG. 42 is a top view of a center tube of the composite cartridge;

FIG. 43 is a cross-sectional view taken along line L-L of FIG. 42;

FIG. 44 is a perspective view of a center tube in a composite cartridge according to some embodiments of the invention;

FIG. 45 is a cross-sectional view of the center tube of FIG. 44;

FIG. 46 is a perspective view of a base pipe in a composite cartridge according to some embodiments of the present invention;

FIG. 47 is a cross-sectional view of the center tube of FIG. 46;

FIG. 48 is a perspective view of a base pipe in a composite cartridge according to some embodiments of the present invention;

FIG. 49 is a cross-sectional view of the center tube of FIG. 48;

FIG. 50 is a perspective view of a base pipe in a composite cartridge according to some embodiments of the present invention;

FIG. 51 is a cross-sectional view of the center tube of FIG. 50;

FIG. 52 is a perspective view of a first cartridge of a composite cartridge according to an embodiment of the present disclosure;

FIG. 53 is a front view of the first filter cartridge of FIG. 52;

FIG. 54 is a top view of the first filter cartridge of FIG. 52;

FIG. 55 is a perspective view of a first cartridge of a composite cartridge according to an embodiment of the present disclosure;

FIG. 56 is a front view of the first filter cartridge of FIG. 55;

FIG. 57 is a top view of the first filter cartridge of FIG. 55;

FIG. 58 is a perspective view of a filter assembly according to some embodiments of the invention;

FIG. 59 is a perspective side view of a filter assembly according to some embodiments of the invention;

FIG. 60 is a cross-sectional view of the filter assembly of FIG. 59;

FIG. 61 is an exploded view of the filter assembly of FIG. 59;

FIG. 62 is a cross-sectional view of a portion of the construction of a composite filter cartridge in which a first filter cartridge is integrally formed with a septum, according to an embodiment of the invention;

FIG. 63 is a cross-sectional view of a composite filter cartridge according to some embodiments of the invention, wherein a first filter cartridge is integrally formed with a septum;

FIG. 64 is a cross-sectional view of the top cover of FIG. 63 with a first filter cartridge inserted into engagement at the arrow;

FIG. 65 is a cross-sectional view of a portion of the structure of a composite cartridge according to some embodiments of the present invention, wherein a center tube is integrally formed with a septum;

FIG. 66 is a cross-sectional view of a portion of the structure of a composite cartridge according to some embodiments of the invention, wherein the center tube is integrally formed with the top cap.

Reference numerals:

1000: a filter element assembly;

100: a composite filter element; the method comprises the steps of carrying out a first treatment on the surface of the 200: a second filter element;

1: a filter shell; 10: a mounting cavity; 10a: a water passing gap; 10a1: a first water gap; 10a2: a second water passing gap;

11: a housing body; 111: a shell body; 112: a shell bottom; 12: a connecting rib; 121: a first connecting rib; 122: a second connecting rib;

2: a filter cartridge:

21: a first filter cartridge; 210: a first filter chamber; 211: a cartridge body; 212: a connection part; 213: a mounting part; 214: a support; 215, respectively; a mating portion; 2151: a process hole;

2131: sealing the container; 214a: a support rib; 214b support table sets; 2141: a sub-support table;

22: a second filter cartridge; 220: a second filter chamber; 221: a first cylinder; 2210: a first cartridge cavity; 222: a second cylinder; 2220: a second cartridge cavity; 223: a connecting cylinder; 2230: a connecting cylinder is provided with a cavity; 224: ribs; 2241: a rib body; 2242: a rib connecting part;

3: a septum; 30: a water passing hole of the separation disc; 31: a spacer body; 32: a spacer disk connection portion; 321: sealing the groove; 33: an annular seal; 311: positioning a supporting table; 312: positioning ribs;

4: a first filter; 40: a filtration channel;

5: a second filter; 51: a first stage filter material; 52: a second stage filter material; 53: a partition plate;

510: a first filter material water channel; 520: a second filter material water channel;

6: a central tube; 60a: a first pipe water passage; 60b: a second pipe water passage;

61: a tube body; 611: a receiving groove; 62: a baffle; 621: a baffle body; 622: a guide part;

7: a top cover; 70: a top cover water flow passage 70;71: a water passing pipe; 72: a chute; 73: a limit part; 74: a top cover support rib;

721: a first extension; 7211: a support step; 722: a second extension;

8: a bottom cover; 80: a water passing hole of the bottom cover; 81: a bottom cover body; 82: a cover connection part;

821: a first connection portion; 822: a second connecting portion; 823: a mounting groove;

300: a waterway plate; 301: a plate body; 302: a water channel; 3011: a first connection base; 3012: a second connecting seat; 3013: annular sealing ribs; 3011a: a first water passing hole; 3012a: and a second water passing hole.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element in question must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; may be a mechanical connection; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.

A filter cartridge assembly 1000 according to an embodiment of the present application will be described in detail with reference to the accompanying drawings, and the filter cartridge assembly 1000 may be used in water treatment apparatuses such as a water purifier, a water dispenser, a water purifier, and the like, but is not limited thereto. In the present application, for convenience of description and understanding, the up-down direction, the left-right direction, and the front-rear direction are described by way of example with respect to the illustrated up-down direction, left-right direction, and front-rear direction, respectively.

As shown in fig. 1-5, a cartridge assembly 1000 according to one embodiment of the present application includes a waterway plate 300, a first cartridge (e.g., the illustrated composite cartridge 100), and a second cartridge 200, and the first cartridge and the second cartridge 200 may perform a filtering process for water flowing therethrough to output filtered purified water to enhance water quality.

Be equipped with first connecting seat 3011 and second connecting seat 3012 on the waterway board 300, first filter core demountable installation is in first connecting seat 3011, and second filter core 200 demountable installation is in second connecting seat 3012, and simple structure is compact, can conveniently pull down filter core and second filter core 200 from waterway board 300 and change and maintain moreover, and the dismouting degree of difficulty is low, and maintenance cost is low.

At least one of the first filter cartridge and the second filter cartridge 200 is a composite filter cartridge, which may be the composite filter cartridge 100 according to an embodiment of the present application. The composite filter element refers to a filter structure integrated with a plurality of common filter elements, and can realize a plurality of filter functions. That is, the first filter cartridge may be a composite filter cartridge 100 integrated with a plurality of common filter cartridges, or the second filter cartridge may be a composite filter cartridge 100 integrated with a plurality of common filter cartridges, or the first filter cartridge and the second filter cartridge 200 may be simultaneously provided as a composite filter cartridge 100 integrated with a plurality of common filter cartridges, respectively.

From this, can expand the filtration function of filter element assembly 1000, increase filter component's filtration volume, promote filtration efficiency, compact structure moreover, occupation space is little, does benefit to spatial layout, can satisfy more installation requirements.

The waterway plate 300 of cartridge assembly 1000 is first described below.

As shown in fig. 10 to 13, the waterway plate 300 for the cartridge assembly 1000 according to an embodiment of the present invention includes an integrally formed plate body 301, and a first connection base 3011 adapted to be connected to a first cartridge and a second connection base 3012 adapted to be connected to a second cartridge 200 are provided on the plate body 301.

The first connection base 3011 is spaced apart from the second connection base 3012 to reserve installation space for letting the first filter element and the second filter element 200, so as to avoid interference. The second connector 3012 and the second connector 3012 are provided on the same side in the thickness direction of the plate body 301, and the first filter element and the second filter element 200 can be mounted on the same side of the plate body 301. For example, in the illustrated example, the waterway plate 300 is horizontally disposed, and the first and second connection seats 3011 and 3012 are provided at the lower side of the plate body 301, so that the first and second cartridges 200 can be installed at the lower side of the plate body 301 in parallel, resulting in a compact structure, facilitating replacement of the first and second cartridges 200, and reducing the height of the cartridge assembly 1000.

The plate body 301 has at least three water passages 302, each water passage 302 having a water port adapted to connect a pipe, the at least three water passages 302 being connected to one of the first and second filter cartridges 200, respectively, for inputting water to be filtered to the first and second filter cartridges 200 and outputting purified water filtered through the first and second filter cartridges 200. Wherein at least three waterways 302 extend toward the same side of waterway plate 300, i.e., at least three waterways 302 are juxtaposed. Therefore, the external pipeline can be connected with a plurality of water channels 302 on the same side of the plate body 301, the connection is convenient and the efficiency is high, and the water channels 302 extending towards the same side of the waterway plate 300 can simplify the structure and optimize the appearance.

For example, in the example shown and described in fig. 10, the plate body 301 has four waterways 302, each waterway 302 having a water gap, the four waterways 302 extending toward the left side of the waterway plate 300, respectively. Of course, the number of water channels 302 may be other, for example, five, six, etc., and at least three water channels 302 may include a raw water channel, a clean water channel, a waste water channel, etc., and it should be noted that the number of water channels 302 is related to the types of the first filter element and the second filter element 200 and the connection manner, which will be understood by those skilled in the art, and will not be repeated herein.

According to some embodiments of the present invention, as shown in fig. 10-13, the first connection base 3011 and the second connection base 3012 may be disposed at intervals along the length direction of the plate body 301, the first filter element is the composite filter element 100, at least three water channels 302 may respectively extend along the length direction of the plate body 301, and one end of each water channel 302 adjacent to the composite filter element 100 is provided with a water gap. For example, the plate body 301 has a longitudinal direction in the left-right direction as shown, the first connector 3011 and the second connector 3012 are disposed at intervals in the left-right direction, the first connector 3011 is located on the left side of the second connector 3012, the composite filter element 100 is connected to the first connector 3011 and is located on the left side of the second filter element 200, at least three water channels 302 extend toward the composite filter element 100 to the left side of the plate body 301, a water gap is provided at the left end of each water channel 302, and external pipes are respectively communicated with the water gap. Thus, the water gap can be arranged on the same side of the waterway plate 300, the water gap can be arranged adjacent to the composite filter element 100, the water gap is convenient to be connected with an external road, the internal waterway 302 of the plate body 301 is simple, and the structural design is simpler and more convenient.

In some embodiments, at least three waterways 302 may be arranged along the width direction of the plate body 301, and in the example shown in fig. 10, the waterways 302 are arranged along the front-rear direction, so that the construction is compact, the connection of external pipelines is facilitated, and the beauty is better.

Alternatively, the diameter D of each nozzle may satisfy: d is more than or equal to 5mm and less than or equal to 30mm, namely, the diameter D of each water gap can be any value between 5mm and 30 mm. For example, the diameter of each nozzle may be 5mm, 10mm, 25m or 30mm, etc. The diameters of the water gaps can be the same so as to be connected with external pipelines with the same diameter, or the diameters of the water gaps can be different so as to adapt to the water inlet and outlet requirements of different water gaps.

The first filter element and the first connection base 3011 and the second filter element 200 and the second connection base 3012 can be detachably connected by threads or a buckle and other structures.

For example, in some embodiments, as shown in fig. 10, 11 and 13, the plate body 301 may be provided with a first annular flange and a second annular flange spaced apart from the first annular flange, the first and second annular flanges being formed as first and second connection seats 3011 and 3012, respectively, to which the first and second cartridges 200 are connected, respectively.

Alternatively, the outer circumferential surface of the first annular flange may be provided with a first external thread adapted to be screwed with the first filter cartridge, and the outer circumferential surface of the second annular flange may be provided with a second external thread adapted to be screwed with the second filter cartridge 200. Thus, the first cartridge is threadably coupled to the first annular flange and the second cartridge 200 is threadably coupled to the second annular flange.

In other embodiments, the plate body 301 is provided with a first annular groove (not shown in the drawings) and a second annular groove (not shown in the drawings) spaced from the first annular groove, the first annular groove and the second annular groove are respectively formed into a first connection seat 3011 and a second connection seat 3012, the first annular groove is connected to the first filter element, and the second annular groove is connected to the second filter element 200.

Alternatively, the inner surface of the first annular groove may be provided with a first internal thread adapted to threadedly engage the first cartridge, and the inner surface of the second annular groove may be provided with a second internal thread adapted to threadedly engage the second cartridge 200. Thus, the first filter cartridge is threadedly engaged with the first annular recess and the second filter cartridge 200 is threadedly coupled to the second annular recess.

Therefore, the waterway plate 300 is simple in structure and convenient to process, and the first filter element and the second filter element 200 are connected to the plate body 301 through threaded fit, so that the waterway plate is convenient and labor-saving to assemble and disassemble, and is beneficial to control of maintenance cost.

According to some embodiments of the present invention, as shown in fig. 12 and 13, at least two annular sealing ribs 3013 may be provided in each of the first and second connection seats 3011 and 3012, the annular sealing ribs 3013 in the first connection seat 3011 being adapted to sealingly connect to the first filter element, and the annular sealing ribs 3013 in the second connection seat 3012 being adapted to sealingly connect to the second filter element 200 to ensure that the respective waterways 302 do not cross each other. At least one first water passing hole 3011a is arranged between two adjacent annular sealing ribs 3013 in the first connecting seat 3011 so as to be communicated with the water channel 302 and the first filter element, and water to be filtered is input into the first filter element; at least one second water passing hole 3012a is arranged between two adjacent annular sealing ribs 3013 in the second connecting seat 3012 so as to be communicated with the water channel 302 and the second filter element 200, water to be filtered is input into the second filter element 200, and purified water after filtration is output.

Optionally, at least two annular sealing ribs 3013 in the first connection base 3011 are arranged concentrically and at least two annular sealing ribs 3013 in the second connection base 3012 are arranged concentrically. Therefore, the structure is compact, the layout is reasonable, the sealing performance can be optimized, and the reliability is improved.

For example, in the example shown in fig. 13, three concentrically arranged annular sealing ribs 3013 are provided in the first connection base 3011, wherein one annular sealing rib 3013 located at the innermost side surrounds one first water passing hole 3011a, one first water passing hole 3011a is provided between two adjacent annular sealing ribs 3013, and one first water passing hole 3011a is provided between one annular sealing rib 3013 located at the outermost side and the inner wall surface of the first connection base 3011; similarly, three annular sealing ribs 3013 are arranged in the second connecting seat 3012, one annular sealing rib 3013 positioned at the innermost side surrounds one second water passing hole 3012a, one second water passing hole 3012a is arranged between two adjacent annular sealing ribs 3013, and one second water passing hole 3012a is arranged between one annular sealing rib 3013 positioned at the outermost side and the inner wall surface of the second connecting seat 3012.

In short, the waterway board 300 for the filter element assembly 1000 of the embodiment of the invention has the advantages of simple and compact structure, good aesthetic property, small occupied space, reasonable layout, convenient disassembly and assembly and labor saving, and can meet more installation requirements.

The structure of the composite cartridge 100 in the cartridge assembly 1000 is described in detail below.

As shown in connection with fig. 4 and 6, a composite filter cartridge 100 according to an embodiment of the present invention includes: the filter cartridge comprises a filter housing 1 and a filter cartridge 2, wherein a mounting cavity 10 is defined in the filter housing 1, the filter cartridge 2 is arranged in the mounting cavity 10, the filter cartridge 2 and the filter housing 1 can form a first filter flow passage and a second filter flow passage which are isolated from each other, a first filter 4 for filtering fluid in the first filter flow passage and a second filter 5 for filtering fluid in the second filter flow passage are arranged in the filter cartridge 2, and the second filter 5 comprises at least two stages of filter materials.

That is, the first filtering flow passage and the second filtering flow passage which are not communicated with each other are provided in the composite filter element 100, the fluid in the first filtering flow passage can be filtered through the first filtering piece 4, the fluid in the second filtering flow passage can be filtered through the second filtering piece 5, and the filtering process in the first filtering flow passage and the filtering process in the second filtering flow passage are mutually independent and are not influenced. Wherein the second filter 5 comprises two or more stages of filter media.

For example, in the example shown in fig. 4 and 6, the second filter 5 includes a first stage filter 51 and a second stage filter 52, and the first stage filter 51 and the second stage filter 52 are arranged in the flow direction of the water flow to perform two-stage filtration of the fluid in the second filtration flow path. Of course, the present invention is not limited thereto, and the second filter 5 may include three or more stages of filter media, for example, four stages, five stages, and the like.

The filter cartridge 2 and the filter shell 1 are utilized to form a first filter flow passage and a second filter flow passage which are isolated from each other, so that two mutually independent filter processes can be simultaneously carried out in the composite filter element 100, and the second filter element 5 is arranged to comprise at least two stages of filter materials, so that the structure is simple and compact, the occupied space is reduced, and the filter effect can be improved.

In one embodiment as shown in fig. 1-5, a composite filter cartridge 100 includes: waterway plate 300, filter shell 1, filter cartridge 2, middle separator 3, first filter 4, second filter 5, and center tube 6.

The waterway board 300 is provided with a filter element connecting seat (for example, a first connecting seat 3011 in the drawing), the filter casing 1 is connected to the mounting seat so as to realize fixation, a mounting cavity 10 is defined in the filter casing 1, and the filter cartridge 2, the first filter element 4, the second filter element 5 and the like can be mounted in the mounting cavity 10.

The filter cartridge 2 is installed in the installation cavity 10, and a filter cavity is defined in the filter cartridge 2, and an outer wall surface of the filter cartridge 2 is spaced apart from an inner wall surface of the filter housing 1 to form a water gap 10a. The middle partition 3 is disposed in the filter cartridge 2, and the middle partition 3 is hermetically connected to the filter cartridge 2 to divide the filter chamber into a first filter chamber 210 adjacent to the waterway plate 300 and a second filter chamber 220 remote from the waterway plate 300, as shown in fig. 4, 5 and 6, and the middle partition 3 is provided with a partition water passing hole 30 communicating the first filter chamber 210 and the second filter chamber 220.

As shown in fig. 4 and 5, the first filter 4 is installed in the first filter chamber 210, and the filter passage 40 is formed in the first filter 4. The second filter element 5 is mounted within the second filter chamber 220. The first filtering piece 4 and the second filtering piece 5 are respectively used for filtering the flowing water, entrapping impurities, microorganisms and bacteria in the flowing water, removing peculiar smell in the water and outputting purified water after improving the water quality.

The central tube 6 may be disposed in the filter passage 40 in the first filter element 4, and the central tube 6 is connected to the septum 3, a first tube water passage 60a is formed in the central tube 6, and a second tube water passage 60b is formed between the central tube 6 and the first filter element 4.

The water gap 10a, the second filter cavity 220 and the first water channel 60a are communicated to form a first filter channel, the first filter cavity 210 is communicated with the second water channel 60b to form a second filter channel, and the first filter channel and the second filter channel are isolated from each other, that is, the first filter channel and the second filter channel are not communicated and are independent from each other.

It will be appreciated that the first filter element 4 is disposed in the first filter flow path and filters water flowing through the first filter flow path, and the second filter element 5 is disposed in the second filter flow path and filters water flowing through the second filter flow path, and the two filtering processes are performed independently and do not affect each other.

In this way, the filtering process in the first filtering flow channel and the filtering process in the second filtering flow channel can be performed simultaneously, and when the first filtering piece 4 and the second filtering piece 5 are the same type of filtering pieces, the filtering quantity can be effectively increased, and the filtering efficiency of the composite filter element 100 is improved; when the first filter element 4 and the second filter element 5 are different kinds of filter elements, the first filter flow passage and the second filter flow passage can simultaneously carry out the filtration processes with different filtration functions.

From this, the user can select to filter water through one or two in first filtration runner and the second filtration runner as required, and the suitability is good, can satisfy multiple different demands, and integrated setting makes simple structure compact moreover, and occupation space is little, does benefit to spatial layout.

The filter housing 1 of the composite filter element 100 according to the embodiment of the present invention will be described below with reference to fig. 14 to 18.

The filter housing 1 is detachably connected to a filter cartridge connecting seat, and in the illustrated example, the filter housing 1 is connected to a first connecting seat 3011, an inner circumferential surface of the filter housing 1 is provided with an inner thread, and the filter cartridge connecting seat is provided with an adapted outer thread. Thus, after the service life of the filter material in the composite filter element 100 expires or is damaged, the filter shell 1 can be detached, the internal filter material can be replaced, the filter shell 1 can be reserved for reuse, the environment is protected, the saving is realized, and the cost can be effectively reduced.

According to some embodiments of the present invention, the filter housing 1 of the composite filter cartridge 100 includes a housing body 11 and a connection rib 12, wherein an installation cavity 10 having an open top is defined in the housing body 11, and as shown in fig. 16 to 18, the housing body 11 includes a housing body 111 and a housing bottom 112 provided at the bottom of the housing body 111, the connection rib 12 may be integrally provided at the housing bottom 112, and the connection rib 12 may be connected with the housing body 111.

Therefore, the strength of the filter shell 1 can be effectively improved, the damage probability of the filter shell 1 is reduced, and the service life is prolonged.

According to some embodiments of the present invention, as shown in fig. 14-18, the connecting rib 12 may include: the first connection rib 121 may be disposed on a side surface of the case facing away from the case 111, and the first connection rib 121 may extend in a radial direction of the case bottom 112, i.e., the first connection rib 121 is disposed on an outer surface of the case bottom 112, and the first connection rib 121 is connected with the case 111 in the radial direction. Thereby can optimize the intensity of shell end 112 and shell body 111 junction, in addition, the setting of first tie rod 121 is convenient for handle the operation to straining shell 1, and easy dismounting is laborsaving more.

In some embodiments, as shown in fig. 15, both ends of the first connection rib 121 may be connected to both diametrically opposite sidewalls of the housing body 111, respectively. In other words, the first connecting ribs 121 are connected to two side walls of the housing 111 in the radial direction, that is, the first connecting ribs 121 are disposed on the bottom surface of the housing bottom 112 and two ends are respectively connected to two opposite sides of the housing 111 in the radial direction, which is simple in structure and reliable in connection.

In other embodiments, the first connecting rib 121 is a plurality disposed around the central axis of the housing bottom 112. For example, in the example shown in fig. 15, the number of the first connection ribs 121 is three, and the three first connection ribs 121 are arranged at intervals in the radial direction, so that the connection strength can be optimized and the reliability can be improved.

Alternatively, one ends of the first connecting ribs 121 are connected, and the other ends of the first connecting ribs 121 are connected to the housing body 111, that is, the first connecting ribs 121 are disposed at the bottom 112 and radially connect the housing body 111.

Advantageously, the plurality of first connecting ribs 121 may be uniformly spaced apart along the circumference of the housing bottom 112. Thereby, the reliability of the filter housing 1 is further improved, and the appearance of the filter housing 1 is more neat and beautiful.

As shown in fig. 16 to 18, the housing body 111 is smoothly connected with the housing bottom 112, and the first connection rib 121 is smoothly connected with the housing body 111, so that stress concentration can be reduced, and connection strength can be further improved.

According to some embodiments of the invention, the connecting bar 12 comprises: at least two second connection ribs 122, at least two second connection ribs 122 may be spaced apart from each other on a side surface of the case bottom 112 facing the case body 111, and at least two second connection ribs 122 extend in a radial direction of the case bottom 112. That is, at least two second connection ribs 122 are provided on the inner surface of the case bottom 112, and at least two second connection ribs 122 extend in the radial direction of the case bottom 112, and at least two connection ribs 12 are provided at intervals.

In this way, the strength of the bottom 112 can be enhanced from the inside, damage to the filter housing 1 can be avoided, and the service life of the filter housing 1 can be prolonged. In addition, the second connecting ribs 122 arranged at intervals can be beneficial to forming the water gap 10a among the second connecting ribs 122, the shell bottom 112 and the filter cartridge 2, and is beneficial to the arrangement of the flow channels.

Alternatively, as shown in fig. 18, each second connecting rib 122 may be formed in an L shape, the filter cartridge 2 may be supported on the L-shaped second connecting rib 122, the outer circumferential surface and the bottom surface of the filter cartridge 2 are respectively stopped on the second connecting ribs 122, stability is good, dislocation of the filter cartridge 2 may be prevented, and sealing reliability is also improved.

Advantageously, the second connection ribs 122 are plural, and the plural second connection ribs 122 are uniformly distributed along the circumferential direction of the case bottom 112, so that stability and reliability can be further improved.

As shown in fig. 17 and 18, the inner ends of the second connecting ribs 122 are spaced apart, so that the water resistance in the water gap 10a can be reduced, and the structural layout can be optimized.

Alternatively, the filter housing 1 may be an integrally formed injection molded piece. In other words, the housing body 111, the housing bottom 112, and the connecting rib 12 may be integrally injection molded. Therefore, the processing is convenient, the assembly process can be omitted, the assembly precision is improved, and the control of the cost is facilitated.

The filter cartridge 2 is installed in the installation cavity 10 of the filter shell 1, a filter cavity is limited in the filter cartridge 2, the outer wall surface of the filter cartridge 2 and the inner wall surface of the filter shell 1 are separated to form a water passing gap 10a, a middle partition plate 3 is arranged in the filter cartridge 2, and the middle partition plate 3 divides the filter cavity into a first filter cavity 210 adjacent to the waterway plate 300 and a second filter cavity 220 far away from the waterway plate 300.

In one embodiment of the present invention, as shown in fig. 4 and 6, the filter cartridge 2 includes a first filter cartridge 21 and a second filter cartridge 22. Wherein the first filter cartridge 21 is disposed in the installation cavity 10, and the first filter cartridge 21 is mounted on a filter cartridge connecting seat (i.e., the first connecting seat 3011 shown in the drawing), a first filter cavity 210 is defined in the first filter cartridge 21, the first filter element 4 is mounted in the first filter cavity 210, the outer circumferential surface of the first filter cartridge 21 is spaced from the inner circumferential surface of the filter housing 1 to form a first water passing gap 10a1, and the second filter cartridge 22 is disposed in the installation cavity 10, optionally, the central axis of the first filter cartridge 21 coincides with the central axis of the second filter cartridge 22, i.e., the second filter cartridge 22 is located at one axial end (e.g., the lower end shown in the drawing) of the first filter cartridge 21, and the structure is more compact. The second filter cartridge 22 defines a second filter chamber 220 therein, the second filter 5 is mounted in the second filter chamber 220, the outer wall surface of the second filter chamber 220 is spaced apart from the inner wall surface of the filter housing 1 to form a second water passing gap 10a2 communicating with the first water passing gap 10a1, and the first water passing gap 10a1 and the second water passing gap 10a2 together form the water passing gap 10a.

The structure of the first filter cartridge 21 will be described in detail with reference to fig. 19 to 22.

According to some embodiments of the present invention, as shown in fig. 19 and 21, the first filter cartridge 21 includes: the cartridge body 211, the mounting portion 213, and the plurality of supports 214.

The cartridge body 211 may have a first filter chamber 210 formed therein, the mounting portion 213 may be connected to one axial end of the cartridge body 211 by a connection portion 212, and the mounting portion 213 may be mounted to a cartridge connection seat (i.e., a first connection seat 3011 as shown), for example, the mounting portion 213 may extend into the cartridge connection seat to cooperate with the annular seal bead 3013, the mounting portion 213 communicating with the first filter chamber 210 to allow water flow within the mounting portion 213 and the cartridge body 211.

As shown in fig. 19 to 21, a plurality of support members 214 may be provided at the outer circumferential surface of the cartridge body 211, and the plurality of support members 214 may be disposed at intervals along the circumferential direction of the cartridge body 211, and each support member 214 may extend outward in the radial direction of the cartridge body 211. That is, the outer peripheral surface of the cylinder body 211 is provided with a plurality of support pieces 214 arranged at intervals in the circumferential direction, and the plurality of support pieces 214 extend away from the central axis of the cylinder body 211, respectively.

The supporting pieces 214 can be stopped against the inner peripheral surface of the filter shell 1, so that a first water passing gap 10a1 can be formed between the inner peripheral surface of the filter shell 1, the outer peripheral surface of the cylinder body 211 and two adjacent supporting pieces 214, the strength of the first filter cylinder 21 can be improved, the first filter cylinder 21 is prevented from being damaged, the concentricity of the first filter cylinder 21 and the filter shell 1 is guaranteed, the water passing smoothness is good, the sealing is stable and reliable, and water leakage is avoided.

Alternatively, as shown in fig. 21, the central axis of the mounting portion 213 and the central axis of the cylinder body 211 may coincide, i.e., the mounting portion 213 is provided at one axial end of the cylinder body 211.

As shown in fig. 21 and 22, the connection portion 212 may extend in the circumferential direction and the radial direction of the cylinder body 211, an outer end of the connection portion 212 may be connected to the cylinder body 211, and an inner end of the connection portion 212 may be connected to the mounting portion 213. Thus, the through body and the mounting portion 213 can be connected by the connection portion 212, and the structure is simple and compact.

In some embodiments, the plurality of supports 214 may include: the plurality of support ribs 214a may be provided at intervals along the circumferential direction of the cylinder body 211 on the outer circumferential surface of the cylinder body 211, and each support rib 214a may extend in the axial direction of the cylinder body 211. Thus, the first water gap 10a1 extending in the axial direction of the cartridge body 211 can be formed between the outer peripheral surface of the cartridge body 211 and the inner peripheral surface of the filter housing 1, and the concentricity of the first filter cartridge 21 and the filter housing 1 can be effectively improved with high reliability.

Alternatively, as shown in fig. 20, the plurality of support ribs 214a may be provided at regular intervals along the circumferential direction of the cartridge body 211, so that the first water passing gap 10a1 may be uniformly arranged on the outer circumferential surface of the cartridge body 211, the water passing resistance is small, the filtering effect is good, and the appearance of the first filter cartridge 21 may be neat and beautiful, and the strength is improved.

Alternatively, as shown in fig. 19 and 21, each of the support ribs 214a may extend from one axial end surface of the cartridge body 211 to the other axial end surface of the cartridge body 211. In the illustrated example, the central axis of the first filter cartridge 21 is oriented in the up-down direction, and each of the support ribs 214a extends from the lower end surface of the cartridge body 211 to the upper end surface of the cartridge body 211. Simple structure, processing is convenient, does benefit to the control cost.

In other embodiments, the plurality of supports 214 may include: at least one support table set 214b, each support table set 214b includes a plurality of sub-support tables 2141, the plurality of sub-support tables 2141 in each support table set 214b are disposed on the outer circumferential surface of the cylinder body 211 and are arranged along the circumferential direction of the cylinder body 211, and each sub-support table 2141 may extend along the circumferential direction of the cylinder body 211. For example, in the example shown in fig. 21, the plurality of support members 214 includes a set of support table groups 214b, the set of support table groups 214b includes six sub-support tables 2141, the six sub-support tables 2141 are provided on the outer peripheral surface of the tube body 211 and are arranged in the circumferential direction of the tube body 211, and each sub-support table 2141 extends in the circumferential direction of the tube body 211. Thus, the outer end of each sub-support 2141 can be stopped against the inner peripheral surface of the filter casing 1, and a water passing gap 10a, preferably water, through which water can pass is formed between the outer peripheral surface of the cylinder body 211 and the inner peripheral surface of the filter casing 1 by the adjacent two sub-support 2141.

Alternatively, the supporting table groups 214b may be multiple groups, and the multiple groups of supporting table groups 214b may be disposed at intervals along the axial direction of the cartridge body 211, so that the inner peripheral surface of the filter housing 1 may be stopped at multiple positions in the axial direction of the cartridge body 211, and further concentricity of the cartridge body 211 and the filter housing 1 may be further ensured, and the assembly stability and the sealing reliability may be better.

Optionally, each sub-support 2141 has a rectangular cross section, is strong, is easy to manufacture, and facilitates cost control.

In still other embodiments, as shown in fig. 19-21, the plurality of supports 214 may include: a plurality of support ribs 214a and a plurality of sub-support blocks 2141. Wherein, the plurality of support ribs 214a are disposed on the outer circumferential surface of the cylinder body 211 and are spaced apart along the circumferential direction of the cylinder body 211, each support rib 214a may extend along the axial direction of the cylinder body 211, each sub-support platform 2141 may be disposed on the outer circumferential surface of the cylinder body 211, and each sub-support platform 2141 extends along the circumferential direction of the cylinder body 211, each sub-support platform 2141 may be located between two adjacent support ribs 214a, and each sub-support platform 2141 is spaced apart from two adjacent support ribs 214 a.

Therefore, the strength of the cartridge body 211 can be effectively improved, the damage probability of the first filter cartridge 21 is further reduced, the concentricity of the cartridge body 211 and the filter shell 1 can be improved by utilizing the plurality of supporting ribs 214a and the plurality of sub supporting platforms 2141, water flowing is smooth, and in addition, the sealing stability and reliability can be effectively improved.

According to some embodiments of the present invention, the outer edges of the plurality of supporting members 214 may be located on the same imaginary circle in the cross section of the cartridge body 211, so that the plurality of supporting members 214 are stopped against the inner circumferential surface of the filter housing 1, and the concentricity of the cartridge body 211 and the filter housing 1 may be ensured to be superior.

As shown in fig. 6 in combination with fig. 4, the mounting portion 213 may be mounted to the cartridge connecting seat, one end (e.g., the upper end as illustrated) of the mounting portion 213 remote from the cylinder body 211 may be provided with a sealing receiving groove 2131 adapted to receive a sealing member for sealing a gap between the mounting portion 213 and the cartridge connecting seat, the sealing receiving groove 2131 is provided at an outer circumferential surface of the mounting portion 213, and the sealing receiving groove 2131 extends in a circumferential direction of the mounting portion 213 to form a closed ring shape. That is, the outer circumferential surface of the mounting portion 213 far from the cylinder body 211 is provided with an annular sealing receiving groove 2131, and a sealing member may be mounted in the sealing receiving groove 2131, and the sealing member is used for sealing a gap between the mounting portion 213 and the filter element connecting seat, so as to avoid occurrence of a water leakage phenomenon, and reduce a water leakage probability.

Optionally, the sealing container 2131 is a plurality, and the plurality of sealing containers 2131 are axially spaced apart. Therefore, the mounting part 213 and the filter element connecting seat can be sealed through a plurality of sealing pieces, the sealing performance is good, the water stringing probability can be greatly reduced, and the reliability is high.

According to some embodiments of the invention, the first filter cartridge 21 is an integrally molded injection molded piece. In other words, the cartridge body 211, the mounting portion 213, and the plurality of supporters 214 are integrally injection molded. Therefore, the processing is convenient, the assembly process is omitted, the control of the cost is facilitated, the assembly precision can be improved, and the concentricity is further ensured.

In some embodiments, a top cover 7 is mounted within the filter cavity of the filter cartridge 2, the top cover 7 being operable to locate the first filter element 4. For example, in the example shown in fig. 4 and 6, the top cover 7 is cooperatively associated with the first filter cartridge 21. The top cover 7 and its related structure will be described in detail below by taking an example in which the top cover 7 is fitted to the first filter cartridge 21.

The top cover 7 is pivotally provided in the filter chamber, one of the filter cartridge 2 and the top cover 7 may be provided with a slide groove 72 extending in the circumferential direction of the filter cartridge 2, and the other of the filter cartridge 2 and the top cover 7 is provided with an engaging portion 215 extending in the circumferential direction of the filter cartridge 2, the engaging portion 215 being slidably engaged with the slide groove 72 in the circumferential direction of the filter cartridge 2. That is, when the chute 72 is disposed on the filter cartridge 2, the engaging portion 215 may be disposed on the top cover 7, or the filter cartridge 2 may be provided with the engaging portion 215, and the top cover 7 may be provided with the chute 72.

For example, in the examples shown in fig. 4 and 6, the sliding groove 72 is provided on the top cover 7, the matching portion 215 is provided on the first filter cartridge 21, the top cover 7 is installed in the first filter cartridge 21, then the top cover 7 or the first filter cartridge 21 is rotated, so that the matching portion 215 on the first filter cartridge 21 slides into the sliding groove 72 to be matched in the sliding groove 72, thereby the assembly of the top cover 7 and the filter cartridge 2 can be realized quickly, the matching of the top cover 7 and the filter cartridge 2 can be disassembled easily, the maintenance and the maintenance are convenient, and the sliding groove 72 is provided on the top cover 7, the processing and the production are convenient, and the cost is convenient to control.

The other end (i.e. the upper end in the drawing) of center tube 6 passes top cap 7, is equipped with top water pipe 71 on the top cap 7, and center tube 6 peg graft in top water pipe 71, top water pipe 71 cooperate the annular seal rib 3013 on the waterway board 300, and top water pipe 71 communicates with waterway 302 on the waterway board 300, compact structure, simple to operate. Moreover, the mode of sliding fit can make the concentricity that improves the annular seal rib 3013 on top cap 7 and the waterway board 300, can prevent that serious decentration from appearing when top cap 7 assembles, can avoid seal structure skew, prevents to appear the cluster water phenomenon, in addition can also prevent that first filter media 4 is eccentric, can improve assembly precision, has improved reliability and stability.

As shown in fig. 4, 6, and 23-25, the engagement portion 215 may be provided to the filter cartridge 2, and the engagement portion 215 may extend toward a central axis of the filter cartridge 2, the slide groove 72 may be provided to a surface (i.e., an upper surface as shown) of the top cover 7, and the slide groove 72 may include, in a section perpendicular to an extending direction of the slide groove 72: a first extension 721 and a second extension 722. Specifically, one end (lower end shown) of the first extension 721 may be connected to the top cover 7, and the other end of the first extension 721 extends away from the top cover 7, and one end of the second extension 722 may be connected to the other end of the first extension 721, and the other end of the second extension 722 extends away from the central axis of the filter cartridge 2.

Alternatively, as shown in fig. 4, 6, 19 and 20, the fitting 215 may extend radially toward the central axis of the filter cartridge 2, the other end of the first extension 721 may extend away from the top cover 7 in the circumferential direction of the filter cartridge 2, and the other end of the second extension 722 may extend radially outward of the filter cartridge 2.

Therefore, the sliding groove 72 can be arranged on the surface of the top cover 7, the sliding groove 72 extends along the circumferential direction, the sliding groove 72 is provided with the first extending section 721 positioned at the inner side and the second extending section 722 extending outwards away from the first extending section 721, the surface of the top cover 7, the first extending section 721 and the second extending section 722 jointly form the sliding groove 72 with the open outer side, the matching part 215 on the filter cylinder 2 can extend from the outer side to the inner side, and when the top cover 7 and the filter cylinder 2 rotate relatively, the matching part 215 can slide into or slide out of the sliding groove 72 along the circumferential direction, so that the structure is simple and compact, the design is ingenious, and the disassembly is convenient.

In some embodiments, as shown in fig. 23 and 25, at the front end of the sliding direction of the mating portion 215, a limiting portion 73 is disposed on the top cover 7 in the sea, so that the mating portion 215 is limited after the mating portion 215 slides into the sliding groove 72 and slides in place, excessive sliding of the mating portion 215 can be avoided, and the mating stability of the mating portion 215 and the sliding groove 72 can be improved, so that the top cover 7 and the mating top frame of the filter cartridge 2 are more stable and reliable, and the sealing performance is further improved.

Alternatively, the stopper 73 may be formed as a stopper plate, and the stopper plate is connected to the first extension 721, the second extension 722, and the top cover 7, respectively. The sliding groove 72 which is open on the radial outer side and the rear side in the sliding direction can be defined between the top cover 7, the first extension 721, the second extension 722 and the limiting plate, so that the structure is simple and compact, and the processing, the assembling and the manufacturing are convenient.

According to some embodiments of the present invention, as shown in fig. 19 and 20, at least one process hole 2151 penetrating the mating portion 215 in the axial direction of the filter cartridge 2 may be provided on the mating portion 215, so that materials may be saved, weight may be reduced, deformation of the mating portion 215 may be avoided, and stability may be improved.

In some embodiments, the sliding grooves 72 are a plurality of sliding grooves 72 distributed at intervals along the circumferential direction of the top cover 7, and as shown in fig. 20, the matching portions 215 are a plurality of sliding grooves 72 in one-to-one correspondence. As shown in fig. 20, the engaging portion 215 and the slide groove 72 may be two, respectively. Thus, the top cover 7 and the filter cartridge 2 can be matched with the matching part 215 through the plurality of sliding grooves 72 to realize multiple positioning, so that the stability is better and the reliability is better.

Alternatively, as shown in fig. 20, the plurality of slide grooves 72 may be uniformly spaced along the circumferential direction of the filter cartridge 2, and the plurality of engaging portions 215 may be uniformly spaced along the circumferential direction of the filter cartridge 2. Therefore, the assembly of the top cover 7 and the filter cartridge 2 can be completed through one-time rotation, the operation is convenient, the efficiency is high, and the sealing is uniform and stable.

According to some embodiments of the present invention, as shown in fig. 23 and 24, the outer circumferential surface of the top cover 7 may be provided with a plurality of top cover support ribs 74 spaced apart along the circumferential direction of the top cover 7, and each top cover support rib 74 may extend in the axial direction and the radial direction of the filter cartridge 2. Optionally, each top cover support rib 74 rests against an inner wall surface of the filter cartridge 2.

In this way, the outer peripheral surface of the top cover 7, the inner peripheral surface of the filter cartridge 2 and the two adjacent top cover supporting ribs 74 can construct the top cover water flow channel 70 which allows water to pass through, water in the filter cavity can flow from the top cover 7 water flow channel 70 to the first filter element 4, and after being filtered by the first filter element 4, the water can flow out of the second filter cavity 220 from the second pipe water flow channel 60b between the first filter element 4 and the central pipe 6, so that the filtering is finished, the structure is simple and compact, the occupied space of the composite filter element 100 can be effectively reduced, the space layout is facilitated, and more installation requirements can be met.

For the second filter cartridge 22, in some embodiments, as shown in fig. 4 and 26-31, the second filter cartridge 22 is disposed within the installation cavity 10 of the filter housing 1, and the second filter cartridge 22 is located at one axial end (e.g., the illustrated lower end) of the first filter cartridge 21, a second filter cavity 220 may be defined within the second filter cartridge 22, a second water gap 10a2 may be formed by being spaced apart between an outer wall surface of the second filter cartridge 22 and an inner wall surface of the filter housing 1, and the second water gap 10a2 communicates with the first water gap 10a1 to form the water gap 10a.

The second filter cartridge 22 may include: the first cylinder 221, the second cylinder 222, and the plurality of ribs 224, specifically, the first cylinder 221 may have a first cylinder chamber 2210 formed therein, the second cylinder 222 is connected to one end of the first cylinder 221 adjacent to the first filter cartridge 21 in the axial direction of the first cylinder 221, and the second cylinder 222 may have a second cylinder chamber 2220 formed therein in communication with the first cylinder chamber 2210.

As shown in fig. 26, 29 and 31, the second cylinder 222 may have an inner diameter smaller than that of the first cylinder 221, an outer diameter of the second cylinder 222 smaller than that of the first cylinder 221, a plurality of ribs 224 may be provided on an outer circumferential surface of the second cylinder 222, and the plurality of ribs 224 may be disposed at intervals along a circumferential direction of the second cylinder 222, and each rib 224 may extend outwardly in a radial direction of the second cylinder 222 and be connected to the first cylinder 221. Thus, the first cylinder 221 is connected to the second cylinder 222, and the plurality of ribs 224 are provided on the outer circumferential surface of the second cylinder 222, so that the second filter chamber 220 can be configured as a chamber having a large lower diameter and a small upper diameter, and the second filter cartridge 22 can be configured as a rocket tube.

Therefore, the structural strength of the second filter cartridge 22 is enhanced, the probability of deformation of the second filter cavity 220 can be reduced, the roundness of the second filter cavity 220 can be guaranteed not to be deformed, effective protection can be provided for the second filter element 5 in the second filter cavity 220, collapse of the second filter element 5 is avoided, the stability is good, the reliability is high, and the service life of the second filter element 5 can be prolonged.

According to some embodiments of the present invention, as shown in connection with fig. 26, 29 and 31, the second filter cartridge 22 further comprises: the connection cylinder 223 may be disposed between the first cylinder 221 and the second cylinder 222, and the connection cylinder 223 may be connected to the first cylinder 221 and the second cylinder 222, respectively, and a connection cylinder 2230 may be formed in the connection cylinder 223 to communicate with the first cylinder 2210 and the second cylinder 2220, respectively, it being understood that the first cylinder 2210, the second cylinder 2220, and the connection cylinder 2230 together constitute the second filter chamber 220 described above. Wherein each rib 224 is connected to the first cylinder 221, the connection cylinder 223, and the second cylinder 222, respectively.

In other words, the first cylinder 221 and the second cylinder 222 are connected through the connecting cylinder 223, and the plurality of ribs 224 not only can enhance the strength of the first cylinder 221 and the connecting cylinder 223, but also can enhance the connection strength of the connection between the first cylinder 221 and the connecting cylinder 223 and the connection between the connecting cylinder 223 and the second cylinder 222, thereby avoiding deformation and damage of the connection and improving the reliability.

In some embodiments, as shown in fig. 31, the connection cylinder 223 may extend in the circumferential direction and the radial direction of the first cylinder 221, an outer end of the connection cylinder 223 may be connected to the first cylinder 221, and an inner end of the connection cylinder 223 may be connected to the second cylinder 222. That is, the connection cylinder 223 is formed in a hollow cylinder ring shape. Simple structure and convenient processing.

In other embodiments, as shown in fig. 26, 27 and 29, the connection cylinder 223 may extend in the axial direction of the first cylinder 221, one axial end (e.g., the illustrated lower end) of the connection cylinder 223 may be connected to the first cylinder 221, and the other axial end (i.e., the illustrated upper end) of the connection cylinder 223 may be connected to the second cylinder 222, with the radial dimension of the connection cylinder 223 gradually decreasing in the direction from the first cylinder 221 toward the second cylinder 222. That is, the connecting cylinder 223 is a reducing cylinder, and the first cylinder 221 and the second cylinder 222 are communicated by the reducing cylinder, so that when the second filter cartridge 22 receives an external force, the sharp impact applied to the connecting portion is reduced, and at the same time, the external shape of the second filter cartridge 22 can be optimized, and the aesthetic property of the second filter cartridge 22 can be improved.

Alternatively, as shown in fig. 29, in the direction from the first cylinder 221 to the second cylinder 222, the side wall of the connection cylinder 223 may be inclined toward the central axis of the second cylinder 222, i.e., the inner wall of the connection cylinder 223 faces the second cylinder 222 and is inclined inward, so that the internal structure of the second filter chamber 220 may be optimized, facilitating the layout and installation of the second filter 5.

Further, as shown in fig. 29, each rib 224 may include: the rib body 2241 and the rib connecting part 2242, the rib body 2241 may be provided on the outer circumferential surface of the second cylinder 222, and the rib body 2241 may extend outward in the radial direction of the second cylinder 222, the rib connecting part 2242 may be connected to an axial end of the rib body 2241, and the rib connecting part 2242 may be connected to the connecting cylinder 223 and the first cylinder 221, respectively, and the structure is simple and compact, and the strength and reliability of the second filter cartridge 22 may be effectively improved.

Alternatively, as shown in fig. 28, the ribs 224 may be uniformly spaced along the circumference of the second cylinder 222, so that the second filter cartridge 22 may be uniformly supported and protected in the circumferential direction, and the reinforcing effect is good, and the overall structure is neat and beautiful.

Optionally, each rib 224 may extend along the axial direction of the second through body, so that a second water passing gap 10a2 extending along the axial direction may be formed between adjacent ribs 224, which is beneficial to reducing the resistance of flowing water and improving the smoothness of water flow.

Alternatively, each rib 224 may extend from an axial end surface (e.g., an upper end surface as illustrated) of the second cylinder 222 away from the first cylinder 221 to the first cylinder 221, that is, each rib 224 extends from an end surface of the second cylinder to be connected to the first cylinder 221 in an axial direction, which is convenient for processing, and may further reduce the probability of deformation damage of the second filter cartridge 22.

Optionally, in the cross section of the second cylinder 222, the outer edges of the ribs 224 are located on the same imaginary circle, so that concentricity of the ribs 224 and the second through cylinder 22 can be ensured, and the mounting accuracy can be further improved.

Alternatively, as shown in fig. 29 and 31, in a section through the central axis of the first through body, the outer edge of each rib 224 is flush with the outer edge of the first cylinder 221. Optionally, the plurality of ribs 224 lie on the same imaginary circle as the outer edge of the first through body in projection along the axial direction of the second through body.

That is, the outer side surface of each rib 224 is coplanar with the outer circumferential surface of the first through body. Thereby, the radial maximum size of the second filter cartridge 22 can be controlled, so that concentricity of the second filter cartridge 22 and the filter shell 1 can be ensured, occupied space can be reduced, layout is facilitated, and more installation requirements can be met.

As shown in fig. 29 and 31, the outer side of the end of each rib 224 remote from the first cylinder 221 is provided with a support step 7211, and the support step 7211 is adapted to cooperate with the septum 3 to support the septum 3 for mounting and positioning the second filter material 5, and the specific structure of the septum 3 will be described in detail later.

To facilitate disassembly and positioning, and to aid in the dual-flow technology of the composite cartridge 100, the bottom of the cartridge 2 may be provided with a bottom cover 8. Specifically, as shown in fig. 4 and 6, a bottom cover 8 may be provided at the bottom of the second filter cartridge 22, the second filter 5 may be mounted on the bottom cover 8, and the bottom cover 8 may be provided with a bottom cover water passing hole 80 communicating the water passing gap 10a and the second filter chamber 220. Thus, the bottom cover 8 can support the second filter 5, thereby improving the stability and reliability of the second filter 5 and preventing water from flowing.

According to some embodiments of the present invention, as shown in fig. 32 to 35, the bottom cover 8 may include a bottom cover body 81 and a cover connection part 82 provided on the bottom cover body 81, the cover connection part 82 may have a ring shape, the bottom cover water passing hole 80 is provided on the bottom cover body 81, the filter cartridge 2 (specifically, the second filter cartridge 22 in the illustrated example) may be stopped against the bottom cover body 81 as shown in fig. 4 and 6, and the filter cartridge 2 may be connected with the cover connection part 82 in a sealing manner. Therefore, the bottom cover 8 can be connected to the bottom of the second filter cartridge 22, the bottom cover 8 is sealed with the second filter cartridge 22 in the circumferential direction, and the bottom cover water passing holes 80 can communicate the second water passing gap 10a2 outside the bottom cover 8 with the second filter cavity 220 in the second filter cartridge 22, so that the installation of the second filter 5 can be facilitated, and the reasonable utilization of the inner space of the second filter cavity 220 is facilitated.

As shown in connection with fig. 32, 34 and 35, the annular connecting portion 212 may include: an annular first connection part 821 and an annular second connection part 822, wherein the first connection part 821 is connected with the outer peripheral edge of the bottom cover body 81, the first connection part 821 extends towards the filter cartridge 2 along the axial direction of the filter cartridge 2, the second connection part 822 can be arranged on one side of the bottom cover body 81 towards the filter cartridge 2, the second connection part 822 can be arranged on the inner side of the first connection part 821 at intervals with the first connection part 821, an annular mounting groove 823 can be formed between the first connection part 821 and the second connection part 822, the filter cartridge 2 can be inserted between the first connection part 821 and the second connection part 822, namely, the filter cartridge 2 is inserted into the mounting groove 823, the bottom cover water passing hole 80 is arranged in the second connection part 822, and the structure is simple and compact, and the installation is convenient and quick.

In some embodiments, as shown in fig. 4 and 6, the filter cartridge 2 may be stopped against the bottom cover body 81, and the filter cartridge 2 may be sealingly connected with at least one of the first connection portion 821 and the second connection portion 822, in other words, the bottom surface of the filter cartridge 2 is stopped against the upper surface of the bottom cover body 81, the filter cartridge 2 is sealingly connected with the first connection portion 821, or the filter cartridge 2 is sealingly connected with the second connection portion 822, or, further, the filter cartridge 2 is simultaneously sealingly connected with the first connection portion 821 and the second connection portion 822. Therefore, the bottom cover 8 and the filter cartridge 2 are convenient to assemble in place, the stability is good, the probability of accidental falling of the bottom cover 8 can be reduced, and the sealing reliability is high.

Alternatively, an annular seal may be provided between a portion of the filter cartridge 2 inserted between the first connection portion 821 and the second connection portion 822 and at least one of the first connection portion 821 and the second connection portion 822. That is, an annular seal may be provided between the filter cartridge 2 and the first connection portion 821, or an annular seal may be provided between the filter cartridge 2 and the second connection portion 822, or an annular seal may be provided between the filter cartridge 2 and the first connection portion 821 and between the filter cartridge 2 and the second connection portion 822, respectively. Therefore, the sealing effect can be further improved, and water can be effectively prevented from being mixed and leaked.

Alternatively, a sealant may be provided between the first connection portion 821 and the second connection portion 822, and the filter cartridge 2 is hermetically connected to the first connection portion 821 and the second connection portion 822 by the sealant. In other words, the filter cartridge 2 is inserted into the annular mounting groove 823 between the first connecting portion 821 and the second connecting portion 822, and sealant is poured into the annular mounting groove 823, so that the sealing connection between the filter cartridge 2 and the first connecting portion 821 and the second connecting portion 822 is realized, dislocation is not easy, a better sealing effect can be ensured, and the cost is controlled.

Alternatively, the filter cartridge 2 and the cover connection 82 may be connected by hot melt. Alternatively, the filter cartridge 2 and the cover connection 82 may be welded and sealed, for example, the filter cartridge 2 and the cover connection 82 may be welded by spin welding or ultrasonic welding. Therefore, not only can the connection between the filter cartridge 2 and the bottom cover 8 be realized, but also the sealing between the filter cartridge 2 and the bottom cover 8 can be realized, the water flowing between the first filter flow passage and the second filter flow passage can be avoided, and the multiple filtering functions of the composite filter element 100 can be realized more stably and reliably.

In some embodiments, as shown in fig. 35, the bottom cover water passing hole 80 may be provided at the middle of the bottom cover body 81, that is, the water passing gap 10a outside the filter cartridge 2 communicates with the filter cavity inside the filter cartridge 2 at the middle of the bottom cover 8, so that the layout of the second filter 5 may be optimized, and the structure may be more compact. Optionally, the bottom cover water passing holes 80 may include a plurality of bottom cover 8 water passing holes (not shown in the drawings) that are distributed at intervals, so that uniformity of water flowing through the bottom cover water passing holes 80 can be improved, strong impact of water flowing on the second filter material 5 when the water pressure is too high can be avoided, and protection can be provided for the second filter material 5 to a certain extent.

In the embodiment illustrated in fig. 4 and 6, the composite filter cartridge 100 further includes a septum 3. The septum 3 and its associated structure are described in detail below with reference to the accompanying drawings.

A middle partition plate 3 is installed in the filter cartridge 2, and the middle partition plate 3 is connected with the filter cartridge 2 in a sealing way so as to divide a filter cavity in the filter cartridge 2 into a first filter cavity 210 adjacent to the waterway plate 300 and a second filter cavity 220 far away from the waterway plate 300. In the illustrated embodiment. The filter cartridge 2 includes a first filter cartridge 21 and a second filter cartridge 22, the septum 3 is connected between the first filter cartridge 21 and the second filter cartridge 22, and the septum 3 separates a first filter chamber 210 and a second filter chamber 220. That is, the middle partition 3 may be hermetically connected to the first filter cartridge 21 and the second filter cartridge 22, respectively, and the middle partition 3 is provided with a partition water passing hole 30 for communicating the first pipe water passing channel 60a in the central pipe 6 with the second filter chamber 220 in the second filter cartridge 22 to isolate the first filter channel from the second filter channel.

Optionally, an annular seal may be provided between the middle spacer 3 and the filter cartridge 2 to separate the first filter chamber 2 from the second filter chamber 220, so as to avoid water leakage.

According to some embodiments of the present invention, as shown in fig. 36-39, the septum 3 may include: the baffle body 31 and the annular baffle connecting part 32, the baffle body 31 can extend along the circumference and the radial direction of the first filter cartridge 21, the baffle water holes 30 can be arranged on the baffle body 31, the baffle body 31 is connected with the second filter cartridge 22 in a sealing way, the baffle connecting part 32 can be connected with the peripheral edge of the baffle body 31, the baffle connecting part 32 can extend along the axial direction of the first filter cartridge 21, and the baffle connecting part 32 can be connected with the first filter cartridge 21 in a sealing way, so that the first filter cavity 210 in the first filter cartridge 21 and the second filter cavity 220 in the second filter cartridge 22 can be separated, the water flowing phenomenon between the first filter cavity 210 and the second filter cavity 220 is prevented, the sealing reliability is good, and dislocation failure is not easy to occur.

Alternatively, as shown in fig. 4 and 6, the first filter cartridge 21 extends downward beyond the middle spacer 3, and an annular sealing member 33 may be disposed between the first filter cartridge 21 and the middle spacer connecting portion 32, that is, a seal is achieved between an inner circumferential surface of the first filter cartridge 21 and an outer circumferential surface of the middle spacer connecting portion 32 by the annular sealing member 33, so that the disassembly and assembly are convenient, and the cost is easy to control.

Further, one of the upper shells of the partition plate connecting part 32 and the first filter cartridge 21 is provided with an annular sealing groove 321, and the annular sealing element 33 is arranged in the sealing groove 321, so that the annular sealing element 33 can be limited in the sealing groove 321, dislocation of the sealing element is avoided, and the sealing reliability is further improved. In the example shown in fig. 4, the seal groove 321 is provided at the spacer connecting portion 32, and in the axial direction of the filter cartridge 2, the seal groove 321 may correspond to the position of the spacer body 31. Therefore, the sealing device is convenient to process, is beneficial to assembly, can effectively control the cost, and can improve the sealing stability.

In some embodiments, the second filter cartridge 22 is provided with a supporting step 7211, and the tray connection portion 32 may abut against the supporting step 7211, specifically, the supporting step 7211 is provided on the ribs 224 of the second filter cartridge 22, and the tray connection portion 32 abuts against the supporting step 7211 on the ribs 224. Thus, the second filter cartridge 22 can be used to support the spacer connection portion 32, and the spacer 3 is provided between the first filter cartridge 21 and the second filter cartridge 22, so that the first filter element 4 in the first filter chamber 210 can be prevented from collapsing, and the reliability can be improved.

According to some embodiments of the present invention, as shown in fig. 4, 38 and 39, the central tube 6 is communicated with the water passing holes 30 of the separation disc, a positioning support table 311 may be disposed in the water passing holes 30 of the separation disc, and one end of the central tube 6 abuts against the positioning support table 311, so that the central tube 6 may be positioned in the first filter cartridge 21, and the structure design is ingenious and the assembly is convenient. Alternatively, the positioning support table 311 may be formed as an annular support table extending in the radial and circumferential directions, so that the center tube 6 can be positioned in the entire circumferential direction with high assembly accuracy and better stability.

According to some embodiments of the present invention, as shown in fig. 39, the spacer body 31 may be provided with a positioning rib 312 surrounding the spacer water hole 30 and extending toward the first filter cartridge 21 in the axial direction, and the central tube 6 may be inserted into the positioning rib 312, so that the positioning rib 312 may limit the central tube 6 in the circumferential direction, preventing the central tube 6 from tilting, and the positioning rib 312 cooperates with the positioning support stand 311 to stably mount the central tube 6 on the septum 3.

Alternatively, one of the positioning rib 312 and the central tube 6 may be provided with a receiving groove 611, and a sealing ring for sealing a gap between the central tube 6 and the septum 3, that is, a sealing ring is provided in the receiving groove 611 to be in sealing communication with the first tube water passage 60a and the septum water hole 30. For example, in the example illustrated in the drawings, the central tube 6 is provided with a receiving groove 611, and the sealing ring is sleeved on the central tube 6 and received in the receiving groove 611. Thus, when the center pipe 6 is installed in the positioning rib 312, the gasket seals the gap between the center pipe 6 and the positioning rib 312 to communicate the diaphragm water passing hole 30 with the first pipe water passing passage 60 a. Simple structure is compact, and sealed effectual, easy dismounting does benefit to the control cost moreover.

In one embodiment of the present invention, the composite filter element 100 includes a central tube 6, wherein the central tube 6 is disposed in the first filter cavity 210, and one end of the central tube 6 is connected to the middle partition 3, the other end of the central tube 6 passes through the first filter cartridge 21, and a first tube water passage 60a communicating with the second filter cavity 220 may be formed in the central tube 6, and the first tube water passage 60a is isolated from the first filter cavity 210. Therefore, the central tube 6 can pass through the first filter cavity 210 and be communicated with the second filter cavity 220, so that the first filter flow channel and the second filter flow channel are mutually isolated, the first filter flow channel and the second filter flow channel can be independently filtered, the mutual influence is avoided, the structure is compact, and the design is ingenious.

As shown in fig. 40 to 43, the center tube 6 is provided in the first filter chamber 210, and one end of the center tube is connected to the middle septum, and in the illustrated example, the center tube 6 is provided in the filter passage 40 in the first filter medium 4, the center tube 6 may include: the pipe body 61 and a plurality of baffle plates 62, wherein a first pipe water passage 60a is formed in the pipe body 61, the plurality of baffle plates 62 may be provided on an outer circumferential surface of the pipe body 61, and the plurality of baffle plates 62 may be provided at intervals along a circumferential direction of the pipe body 61, and each baffle plate 62 may extend outward in a radial direction of the pipe body 61 to form a second pipe water passage 60b between two adjacent baffle plates 62 and the first filter medium 4.

That is, the hollow tube body 61 is formed therein with the first tube water passing passage 60a, the plurality of baffle plates 62 are provided on the outer circumferential surface of the tube body 61 and extend outwardly, and the second tube water passing passage 60b may be formed between the outer circumferential surface of the tube body 61, the adjacent two baffle plates 62 and the inner wall surface of the filter passage 40 in the first filter medium 4, and the first tube water passing passage 60a and the second tube water passing passage 60b are independent from each other and are not communicated with each other on the inner and outer sides of the tube body 61, respectively.

Therefore, the plurality of baffle plates 62 can play a supporting role on the first filter material 4, can improve the strength of the second filter material 5, prevent the filter material from deforming and collapsing, can improve the filtering stability, can form the second pipe water channel 60b, and enable the first pipe water channel 60a and the second pipe water channel 60b to be independently arranged, so that the structure design is ingenious and the space utilization rate is high.

Alternatively, as shown in fig. 40 and 42, the plurality of baffle plates 62 may be uniformly spaced along the circumference of the pipe body 61, so that a plurality of uniformly distributed flow passages may be formed on the outer circumferential surface of the pipe body 61, so that the water flowing is smooth and stable, and the filtering effect is improved.

Alternatively, in the axial direction of the pipe body 61, both ends of each of the blocking pieces 62 may have a gap in the axial direction of the pipe body 61 with both ends of the pipe body 61, respectively. That is, each of the blocking pieces 62 is located at the middle of the tube body 61. Thereby, pipe sections may be reserved for assembling the central pipe 6 with the waterway plate 300 and the middle septum 3.

In some embodiments of the present invention, as shown in fig. 43, each flap 62 may include: a blocking body 621 and a guide portion 622, wherein the blocking body 621 may be provided on an outer circumferential surface of the pipe body 61, and the blocking body 621 may extend radially outward, the guide portion 622 may be connected to an axial end portion of the body, and the guide portion 622 may be connected to the pipe body 61, and an outer side surface of the guide portion 622 is a slope extending away from the blocking body 621 and inclined toward a central axis of the pipe body 61. For example, in the illustrated example, the pipe body 61 is oriented in the up-down direction, and each of the stoppers 62 includes a stopper body 621 and two guide portions 622 provided at both upper and lower ends of the stopper body 621, wherein the outer side of the upper guide portion 622 extends obliquely upward and inward, and the outer side of the lower guide portion 622 extends downward and obliquely inward.

Thus, the inclined surface on the guide portion 622 can provide an auxiliary effect in mounting, facilitating the installation of the center tube 6 into the filter passage 40 in the first filter medium 4, reducing the difficulty in assembly, improving the assembly efficiency, and reducing the assembly error.

Alternatively, the first water channel 60a extends along the axial direction of the pipe body 61, as shown in fig. 43, the first water channel 60a may extend from one axial end surface of the pipe body 61 to the other axial end surface of the pipe body 61, i.e. the first water channel 60a extends along the axial direction of the pipe body 61 through both ends of the pipe body 61, so that the structure is compact, the processing and manufacturing are convenient, and the assembly is facilitated.

In some embodiments, as shown in fig. 42, the cross section of the pipe body 61 and the cross section of the first pipe water passing channel 60a may be circular, that is, the pipe body 61 is a circular pipe, the first pipe water passing channel 60a is a circular channel, and, in the cross section of the pipe body 61, the outer edges of the plurality of baffle plates 62 may be located on the same imaginary circle, so that the plurality of baffle plates 62 may abut against the inner circumferential surface of the first filter material 4, the concentricity between the first filter material 4 and the first filter cavity 210 may be improved, the water passing is smooth, and the filtering effect is good.

As shown in fig. 43, the pipe body 61 is provided at both axial ends thereof with receiving grooves 611 adapted to receive the sealing members, respectively, the receiving grooves 611 being provided on the outer peripheral surface of the pipe body 61 and extending in a closed loop shape in the circumferential direction of the pipe body 61. Thus, after the central tube 6 is installed in the first filter cartridge 21, the sealing element at the top can seal the gap between the annular sealing rib 3013 in the first installation connecting seat 3011 and the central tube 6, and meanwhile, the sealing element at the bottom can seal the gap between the water passing holes 30 of the separation disc and the central tube 6, so that the mutual independence of the first filtering flow passage and the second filtering flow passage is realized, and water stringing is avoided.

Optionally, the accommodating grooves 611 may be multiple, and the multiple accommodating grooves 611 may be disposed along the axial direction of the pipe body 61 at intervals, so that a plurality of sealing rings may be installed to seal the gaps between the central pipe 6 and the middle partition 3 and between the central pipe 6 and the water path plate 300, so as to further avoid water flowing and leaking, improve filtering stability, and prolong the service life of the composite filter element 100.

Advantageously, the central tube 6 may be an integrally formed part, in other words, the tube body 61 and the plurality of baffle plates 62 may be integrally formed, so that the assembly process can be omitted, the error caused by the assembly can be avoided, the concentricity of the first filter material 4 and the first filter cavity 210 is ensured, the water passing is smooth and stable, and the filtering effect is better.

Wherein the central tube 6, the middle partition 3 and the first filter cartridge 21 and the second filter cartridge 22 cooperate to form an isolation assembly for isolating the first filter flow path from the second filter flow path.

As for the first filter 4 and the second filter 5, as shown in connection with fig. 2, 4 and 6, the first filter 4 is installed in the first filter chamber 210, the second filter 5 may be located at one axial end of the first filter 4, and the second filter 5 is installed in the second filter chamber 220. Wherein, in the direction of water flow, the second filter element 5 may be located downstream of the first filter element 4, in the axial direction of the filter housing 1, and the second stage filter material is located downstream of the first stage filter material, in the axial direction of the filter housing, the length L1 of the first stage filter material and the length L2 of the second stage filter material satisfy: L2/L1 is more than or equal to 0.5 and less than or equal to 1.

That is, the filter elements are arranged in segments, and the first filter element 4 and the second filter element 5 are distributed in the axial direction. The water to be filtered can be filtered by the first filter element 4 and then filtered by the second filter element 5, namely, the first filter element 4 is a front filter material core, the second filter element 5 is a rear filter material core, and the length ratio of the front filter material core to the rear filter material core is 1:1 to 1:5. Therefore, the waterway layout in the filtering process can be optimized, the occupied space is reduced, the expected service lives of the first filtering piece 4 and the second filtering piece 5 can be matched, the replacement frequency can be reduced, and the control cost is facilitated.

Here, the second filter element 5 is located downstream of the first filter element 4 in the direction of the water flow, which may be that the water flow first passes through the first filter element 4 and then directly passes through the second filter element 5 to be filtered again, or that the water flow first passes through the first filter element 4 and then passes through other filter elements (for example, the second filter element 200 illustrated in the drawing) to be filtered again, and then passes through the second filter element 5 to be filtered again.

Alternatively, the minimum inner diameter of the filter housing 1 may be D1, and the maximum outer diameter of the filter cartridge 2 may be D2, and D1 and D2 may satisfy: D1-D2 is more than or equal to 0.5mm. In other words, the annular water passing gap 10a formed between the inner peripheral surface of the filter housing 1 and the outer peripheral surface of the filter cartridge 2 may have a size of 0.25mm or more. For example, the inner peripheral surface of the filter housing 1 and the outer peripheral surface of the filter cartridge 2 may have a gap of 0.5mm therebetween, at which time d1—d2=10 mm. Of course, the present invention is not limited thereto, and the gap formed between the inner peripheral surface of the filter housing 1 and the outer peripheral surface of the filter cartridge 2 may be of other dimensions. Like this, can reduce the water resistance in the first filtration runner, make the water smooth and easy, can promote the filter effect, the water purification output is stable.

Alternatively, the minimum inner diameter d of the first tube water passage 60a in the center tube 6 may satisfy: d is more than or equal to 3mm. For example, the inner diameter of the first pipe water passage 60a may be 3mm, 5mm, 10mm, etc. Therefore, the water pressure in the first pipe water flow passage 60a can be reduced, the filtering effect is good, and the purified water output is smooth and stable.

According to some embodiments of the present invention, each of the first filter element 4 and the second filter element 5 may include at least one filter material, and different impurities in the water may be purposefully filtered through different filter materials, improving taste quality of the water, and expanding filtering function of the composite filter element 100. For example, in the illustrated example, the first filter 4 includes one filter material, and the second filter 5 includes two stages of filter materials.

In some embodiments, the second filter 5 may include multiple stages of filter media, and the multiple stages of filter media may be distributed axially within the second filter cavity 220. From this, can expand the filtering capability of post filter core, can further optimize out water quality and play water taste, the inner space that simultaneously can rational utilization second filter chamber 220, structural layout is reasonable ingenious, easy dismounting.

Alternatively, as shown in fig. 4 and 6, the second filter 5 may include a first stage filter 51 having a cylindrical shape and a second stage filter 52 having a cylindrical shape, and the second stage filter 52 may be provided at one end (e.g., an upper end as illustrated) of the first stage filter 51 adjacent to the first filter 4, and the first stage filter 51 and the second stage filter 52 may be spaced apart from each other by a partition plate 53. In this way, the first stage filter material 51 and the second stage filter material 52 may be arranged in the axial direction, so that the water flow sequentially passes through the first stage filter material 51 and the second stage filter material 52 when flowing from the water gap 10a to the first pipe filter channel 6a through the second filter cavity 220, thereby realizing two-stage filtration, having simple and compact structure and good filtration effect.

Further, as shown in fig. 4 and 6, the first stage filter 51 may have a first filter water passage 510 therein, the second stage filter 52 may have a second filter water passage 520 therein, the first filter water passage 510 communicates with the water passing gap 10a, and the second filter water passage 520 communicates with the first pipe water passing passage 60 a. Thus, the water in the water gap 10a can flow into the first filter medium water passage 510, be filtered by the first filter medium 51, flow to the second filter medium 52, be filtered by the second filter medium 52, flow from the second filter medium water passage 520 to the first pipe water passage 60a, and be finally output.

Among them, regarding the constitution and type of the first filter member 4 and the second filter member 5, those skilled in the art can make an adaptive setting according to factors such as demand, cost, installation space, and the like. For example, the first filter element 4 comprises a single filter material and the second filter element 5 comprises a two-stage filter material including, but not limited to, a screen, a cloth, activated carbon, PP cotton, and the like. The present invention is not particularly limited thereto.

A filter cartridge assembly 1000 and its filtration process according to one embodiment of the present invention is described in detail below in conjunction with fig. 4 and 6.

In this embodiment, the filter element assembly 1000 includes a waterway board 300, a first filter element and a second filter element 200, where the first filter element is a composite filter element 100, and the second filter element 200 is a reverse osmosis filter element, that is, a front filter element and a rear filter element in the prior art are integrated into the composite filter element 100 in this embodiment, the composite filter element 100 is installed in a first connection base 3011, the second filter element 200 is installed in a second connection base 3012, the central axis of the composite filter element 100 and the central axis of the second filter element 200 are both oriented along the up-down direction, and the composite filter element 100 and the second filter element 200 are substantially perpendicular to the waterway board 300.

When the filter element assembly 1000 is in use, the first filter flow passage and the second filter flow passage in the composite filter element 100 are independent of each other and are not communicated with each other.

Specifically, when the filter element assembly 1000 is used, external water enters the composite filter element 100 from the waterway plate 300, as shown by solid straight arrows in the figure, the water passes through the top cover water flow channel 70 between the top cover support ribs 74 and the first filter cartridge 21, enters the first filter cavity 210, is filtered by the first filter element 4, flows from outside to inside, then flows into the second pipe water flow channel 60b between the first filter element 4 and the pipe body 61, and then flows out of the waterway 302 on the waterway plate 300, and the pre-filtration process in the second filter flow channel 1002 is completed.

The water filtered by the pre-filter element can flow to the second filter element 200 for secondary filtration, and in this embodiment, the second filter element 200 is a reverse osmosis filter element, and the filtration process of the reverse osmosis filter element is well known to those skilled in the art, and will not be described in detail herein.

The water filtered by the second filter cartridge 200 may flow from the waterway plate 300 into the filter housing 1, as indicated by the hollow straight arrow in fig. 4, from the first water passing gap 10a1 between the filter housing 1 and the first filter cartridge 21 to the second water passing gap 10a2 between the filter housing 1 and the second filter cartridge 22, then from the bottom cover water passing hole 80 on the bottom cover 8 into the second filter cavity 220, filtered from the first filter material waterway 510 through the first stage filter material 51, then from the edge of the partition plate 53 to the second stage filter material 52, filtered from the second stage filter material 52, then into the second filter material waterway 520 through the partition plate water passing hole 30 on the partition plate 3, then from the first pipe water passing channel 60a to the waterway plate 300, completing the post-filtration process in the first filter flow channel, and then through the waterway plate 300, outputting the filtered purified water.

In the above embodiment of the present invention, the filtration process in the first filtration flow path is different from the filtration process in the second filtration flow path, and continuous filtration can be realized in cooperation with the reverse osmosis filter element. Of course, it is understood that the filtration process in the first filtration flow path and the filtration process in the second filtration flow path may also be the same, and that the composite filter element 100 and the second filter element 200 may be side-by-side in separate filtration processes.

A water treatment apparatus according to an embodiment of the present invention includes a filter cartridge assembly 1000 according to the above-described embodiment of the present invention, the filter cartridge assembly 1000 having the composite filter cartridge 100 of the above-described embodiment.

According to the water treatment equipment provided by the embodiment of the invention, by arranging the composite filter element 100, double-flow-passage independent filtration can be realized, the filtering effect is good, the structure is simple and compact, reasonable layout is facilitated, the disassembly and assembly are convenient and labor-saving, the maintenance cost can be saved, in addition, the occupied space is reduced, and more installation requirements can be met.

The water treatment device can be a water purifier, a water purifying machine, a water dispenser and the like. Other structures and operations of the water treatment apparatus according to the 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 specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A filter assembly, comprising:

a filter cartridge, a first filtering flow passage and a second filtering flow passage which are isolated from each other are formed in the filter cartridge, wherein a first filtering piece for filtering fluid in the first filtering flow passage and a second filtering piece for filtering fluid in the second filtering flow passage are arranged in the filter cartridge, the second filtering piece comprises a first-stage filtering material and a second-stage filtering material,

Wherein, the second level filter media is located and is close to the one end of first filter media, the length L1 of first level filter media with the length L2 of second level filter media satisfies: L2/L1 is more than or equal to 0.5 and less than or equal to 1; wherein the method comprises the steps of

The filter cartridge includes:

a first filter cartridge having a first filter cavity defined therein; the first filter element is arranged in the first filter cavity;

the second filter cartridge is arranged at one axial end of the first filter cartridge, a second filter cavity is defined in the second filter cartridge, and the second filter element is arranged in the second filter cavity;

the isolation component is respectively connected with the first filter cartridge and the second filter cartridge and is used for isolating the first filtering flow passage and the second filtering flow passage;

the isolation assembly includes:

a septum connected between the first filter cartridge and the second filter cartridge and separating the first filter chamber and the second filter chamber;

the central tube is arranged in the first filter cavity, one end of the central tube is connected with the middle partition plate, the other end of the central tube penetrates out of the first filter cylinder, a first tube water passing channel communicated with the second filter cavity is formed in the central tube, and the first tube water passing channel and the first filter cavity are mutually isolated;

The center tube includes: the pipe body and separation blade, wherein, form in the pipe body first pipe water channel, a plurality of the separation blade is located the outer peripheral face of pipe body, a plurality of the separation blade is followed the circumference interval setting of pipe body, every the separation blade is followed the radial outside extension of pipe body forms the second pipe water channel between adjacent two the separation blade with first filter media.

2. The filter assembly of claim 1, wherein the first tube water passage communicates with the second filter chamber through a septum water passage provided on the septum.

3. The filter assembly of claim 2, wherein a positioning support is provided in the spacer water bore, and one end of the center tube is stopped against the positioning support.

4. The filter assembly of claim 2, wherein the septum is provided with a locating rib surrounding the septum water hole and extending toward the first filter cavity along the axial direction of the filter cartridge, and the center tube is inserted into the locating rib.

5. The filter assembly of claim 4, wherein one of the locating rib and the central tube is provided with a receiving groove, and wherein a sealing ring is provided in the receiving groove for sealing a gap between the central tube and the septum.

6. The filter assembly of claim 1, wherein the filter assembly further comprises:

the bottom cover is arranged on the second filter cylinder and is provided with a bottom cover water passing hole communicated with the second filter cavity.

7. The filter assembly of claim 6, wherein the bottom cap water passing hole is provided in a middle portion of the bottom cap.

8. The filter assembly of claim 7, wherein the bottom cap water passing holes comprise a plurality of bottom cap water passing holes spaced apart.

9. A water treatment apparatus, characterized by a filter assembly according to any one of claims 1-8.

10. A composite filter cartridge, comprising:

the filter shell is internally provided with an installation cavity;

a filter cartridge provided in the installation cavity and forming a first filter flow passage and a second filter flow passage isolated from each other with the filter housing, wherein a first filter member for filtering fluid in the first filter flow passage and a second filter member for filtering fluid in the second filter flow passage are provided in the filter cartridge, the second filter member comprises a first stage filter material and a second stage filter material,

the second-stage filter material is located at one end of the first filter element, and in the direction of water flow, the second-stage filter material is located at the downstream of the first-stage filter material, in the axial direction of the filter shell, the length L1 of the first-stage filter material and the length L2 of the second-stage filter material satisfy the following conditions: L2/L1 is more than or equal to 0.5 and less than or equal to 1;

Wherein the method comprises the steps of

The filter cartridge comprises a first filter cartridge and a second filter cartridge, the first filter cartridge is arranged in the mounting cavity, and a first filter cavity is defined in the first filter cartridge; the first filter element is arranged in the first filter cavity; the second filter cartridge is provided in the mounting cavity, a second filter cavity is defined in the second filter cartridge, the second filter element is mounted in the second filter cavity, and the composite filter element further comprises:

11. The composite filter cartridge of claim 10, wherein an outer wall surface of the filter cartridge is spaced apart from an inner wall surface of the filter housing to form a water gap.

12. The composite filter cartridge of claim 11, wherein the minimum inner diameter of the filter housing is D1 and the maximum outer diameter of the filter cartridge is D2, D1 and D2 satisfying: D1-D2 is more than or equal to 0.5mm.

13. The composite filter element of claim 10, wherein the minimum inner diameter d of the first tube water passage satisfies: d is more than or equal to 3mm.

14. The composite filter element of claim 10, wherein the second filter element comprises at least two stages of filter media distributed along an axial direction of the filter cartridge.

15. The composite filter element of claim 14, wherein the second filter element comprises a cylindrical first stage filter material and a cylindrical second stage filter material, the second stage filter material being disposed at an end of the first filter element adjacent the first filter element, the first stage filter material and the second stage filter material being separated by a separator.

16. The composite filter cartridge of claim 15, wherein an outer wall surface of the filter cartridge is spaced apart from an inner wall surface of the filter housing to form a water gap, the second filter cavity being in communication with the water gap.

17. The composite filter element of claim 16, wherein the first stage filter has a first filter water pass therein and the second stage filter has a second filter water pass therein, the first filter water pass in communication with the water gap and the second filter water pass in communication with the first tube water pass.

18. A water treatment apparatus, comprising:

the water channel plate is provided with a filter element connecting seat;

a filter cartridge, which is a composite filter cartridge according to any one of claims 10 to 16, the composite filter cartridge being detachably connected to the cartridge connecting seat.