CN212067934U - Filter core structure and purifier - Google Patents

Abstract

The utility model relates to a purifier technical field, concretely relates to filter core structure and purifier, filter core structure includes: a filter flask; the first filter material structure is arranged in the filter bottle and forms a first water inlet channel with the inner wall of the filter bottle; the first sleeve is arranged in the first filter material structure, and a first water outlet channel is formed between the first sleeve and the first filter material structure; the second filter material structure is arranged in the first sleeve, a second water inlet channel is formed between the second filter material structure and the first sleeve, and a second water outlet channel is formed in the second filter material structure; the adapter assembly is arranged at the first end of the filter bottle, a first water inlet end communicated with the first water inlet channel is formed between the adapter assembly and the filter bottle, and a first water outlet end, a second water inlet end and a second water outlet end are respectively arranged in the adapter assembly; the bottle cap is arranged at the second end of the filter bottle in a sealing mode. This filter core structure composite filter core structure as an organic whole, change and easy maintenance can reduce the purifier volume, improve space utilization.

Description

Filter core structure and purifier

Technical Field

The utility model relates to a purifier technical field, concretely relates to filter core structure and purifier.

Background

At present, the filter core of most of water purifiers is formed for a plurality of filter core combinations usually, and the water purifier is bulky, and every filter core needs to be changed alone and maintained, not only occupies that the volume is great, with high costs, and the filter core is changed manyly moreover, seriously influences user experience.

In the prior art, a filter element is a composite filter element, at least two filter materials are filled in the filter element, a water path is arranged in the filter element to connect different filter materials in series, a water inlet and one or two water outlets are arranged outside the filter element, water flow enters from the water inlet and sequentially passes through different filter materials in the filter element along the water path and then flows out of the composite filter element from the water outlets, but the composite filter element cannot process multi-path water inflow, and the application of the composite filter element has certain limitation.

In the prior art, the shells of the filter elements of a plurality of single filter materials are directly connected together, so that the filter elements with multiple filtering functions are combined, but the connection of the shells of the filter elements can form a plurality of exposed connecting parts, so that the connecting parts can become a plurality of exposed water leakage hidden dangers, and once the connecting parts are sealed or welded, the water leakage risk can be caused.

SUMMERY OF THE UTILITY MODEL

Therefore, an object of the utility model is to provide a can reduce purifier volume, improve space utilization's filter core structure and purifier.

In order to solve the technical problem, the utility model provides a pair of filter core structure, include:

a filter flask;

the first filter material structure is arranged in the filter bottle and forms a first water inlet channel with the inner wall of the filter bottle;

the first sleeve is arranged in the first filter material structure, and a first water outlet channel is formed between the first sleeve and the first filter material structure;

the second filter material structure is arranged in the first sleeve, a second water inlet channel is formed between the second filter material structure and the first sleeve, and a second water outlet channel is formed in the second filter material structure;

the adapter assembly is arranged at the first end of the filter bottle, a first water inlet end communicated with the first water inlet channel is formed between the adapter assembly and the filter bottle, and a first water outlet end communicated with the first water outlet channel, a second water inlet end communicated with the second water inlet channel and a second water outlet end communicated with the second water outlet channel are respectively arranged in the adapter assembly;

and the bottle cap is arranged at the second end of the filter bottle in a sealing way.

And a positioning component for positioning the first filter material structure is arranged in the filter bottle.

The positioning assembly comprises:

the lower end cover is matched and clamped with the adapter assembly, and a first groove suitable for embedding the first end of the first filter material structure is formed in the lower end cover;

and the upper end cover is sleeved outside the first sleeve, and is provided with a second groove suitable for embedding the second end of the first filter material structure.

The upper end cover is provided with a plurality of positioning bones, and the positioning bones are suitable for being embedded into a gap between the upper end cover and the filter flask.

The first filter structure includes:

the first filter material is annular;

the framework is annular and is arranged on the inner side of the first filter material, and water through holes are formed in the framework.

The second filter material structure comprises a second filter material and a third filter material, the third filter material is arranged at the downstream position of the second filter material, and the second water outlet channel is formed in the second filter material and the third filter material respectively.

And a second sleeve is arranged outside the third filter material, and a second water inlet channel is formed between the second sleeve and the first sleeve.

A plurality of convex bones facing the first sleeve are arranged outside the second sleeve.

The first end of the second filter material is provided with a lower cover plate, the lower cover plate is covered on the second filter material and is in sealing connection with one end, close to the bottle cap, of the first sleeve, the second end of the second filter material is provided with an upper cover plate, the upper cover plate is covered on the second filter material, a through hole communicated with the second water outlet channel is formed in the upper cover plate, and the second sleeve is in sealing connection with the upper cover plate.

One end of the third filter material is provided with a sleeve cover, a second water inlet channel is formed between the sleeve cover and the first sleeve, and a channel communicated with the second water outlet channel and the second water outlet end is arranged in the sleeve cover.

The adapter subassembly includes first adapter, be formed with in the first adapter the second goes out water end, first adapter with first sleeve cooperation joint, the sealed cover of first adapter is established outside the cover.

The first sleeve inner wall is equipped with L type bone, be equipped with the constant head tank on the L type bone, be equipped with horizontal bone on the first adapter, be equipped with the arch on the horizontal bone, the arch is suitable for the card to be gone into in the constant head tank.

And a check valve is arranged between the first adapter and the sleeve cover.

The adapter subassembly is still established including the cover second adapter, the cover outside the first adapter are established third adapter outside the second adapter, the third adapter with form between the filter flask first end of intaking, the second adapter with form between the third adapter first water outlet end, the second adapter with form between the first adapter the second end of intaking, the second adapter with be equipped with the elastic component between the first adapter, the second adapter the third adapter has the messenger the operating condition that first end of intaking switched on, and make the initial condition of first end disconnection of intaking.

At least the third adapter is equipped with the sealing washer outward to make the third adapter is located during initial condition, the third adapter with filter flask sealing connection.

And a mounting groove is formed outside the third adapter, and the sealing ring is positioned in the mounting groove.

The utility model also provides a water purifier, include filter core structure.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a filter core structure is integrated first filter media structure, second filter media structure in the filter flask, and composite filter core structure as an organic whole changes and easy maintenance, can reduce the purifier volume, improves space utilization to this filter core structure has two ends of intaking, two water ends, can satisfy multiple water demand.

2. The utility model provides a filter element structure, it is right to be equipped with in the filter flask the locating component of first filter media structure location, locating component's setting can make things convenient for the installation of first filter media structure, also can avoid first filter media structure to take place the slope in the filter flask simultaneously.

3. The utility model provides a filter core structure, be equipped with a plurality of location bones on the upper end cover, the location bone is suitable for the embedding the upper end cover with in the clearance between the filter flask, the setting of location bone can further prevent that first filter media structure from taking place the slope in the filter flask.

4. The utility model provides a filter element structure, first filter media structure includes: the first filter material is annular; the framework is annular and is arranged on the inner side of the first filter material, water holes are formed in the framework, and the framework can support the first filter material to avoid deformation of the first filter material.

5. The utility model provides a filter core structure, second filter media structure includes second filter media, third filter media, the third filter media is established the low reaches position department of second filter media, the second filter media be formed with respectively in the third filter media the second goes out water passageway, second filter media structure are the composite construction of second filter media and third filter media, and water enters water passageway through the second end of intaking, filters through the third filter media after the second filter media filters again, and the water purity that goes out water passageway through the second is higher.

6. The utility model provides a filter core structure, the third filter media is equipped with the second sleeve outward, the second sleeve with form between the first sleeve the second inlet channel, the water in the second inlet channel can be avoided in the telescopic setting of second directly gets into the third filter media.

7. The utility model provides a filter core structure, the second sleeve is equipped with a plurality of orientations outward first telescopic protruding bone can prevent that the water pressure in first water inlet channel and the first water outlet channel is too high and cause first sleeve to sink and warp.

8. The utility model provides a filter core structure, the one end of third filter media is equipped with the sleeve cover, the sleeve cover with be formed with between the first sleeve the second passageway of intaking, be equipped with in the sleeve cover with the second go out the water passageway with the passageway of second play water end intercommunication, the setting of sleeve cover can further avoid the water in the second passageway of intaking to get into the third filter media in, make simultaneously that the water after the third filter media filters can only follow the second and go out the water end and flow.

9. The utility model provides a filter core structure, the adapter subassembly includes first adapter, be formed with in the first adapter the second goes out the water end, first adapter with first sleeve cooperation joint, first adapter sealing cap is established outside the cover, first adapter and first sleeve connected mode are simple and convenient, and assembly efficiency is high.

10. The utility model provides a filter core structure, first sleeve inner wall is equipped with L type bone, be equipped with the constant head tank on the L type bone, be equipped with horizontal bone on the first adapter, be equipped with the arch on the horizontal bone, the arch is suitable for the card to go into in the constant head tank, first sleeve and first adapter assemble through rotatory mode, and the assembly mode is simple and convenient.

11. The utility model provides a filter core structure, first adapter with be equipped with the check valve between the sleeve cap, can avoid the pure water after the filtration to reversely get into in the third filter media.

12. The utility model provides a filter element structure, the adapter assembly further comprises a second adapter sleeved outside the first adapter, a third adapter sleeved outside the second adapter, the first water inlet end is formed between the third adapter and the filter flask, the first water outlet end is formed between the second adapter and the third adapter, the second water inlet end is formed between the second adapter and the first adapter, an elastic element is arranged between the second adapter and the first adapter, the second adapter and the third adapter have a working state for switching on the first water inlet end and an initial state for switching off the first water inlet end, when the filter element structure is installed on a water purifier body, a structure on the water purifier body can support the second adapter, and the elastic element is compressed by the movement of the second adapter and the third adapter, first inlet channel switches on automatically, and this filter core structure is when leaving the organism, and the elastic component makes second adapter, third adapter automatic re-setting, and first inlet channel breaks off, can automatic lock water.

13. The utility model provides a filter core structure, at least the third adapter is equipped with the sealing washer outward, so that the third adapter is located during initial condition, the third adapter with filter flask sealing connection, this filter core structure can automatic stagnant water when installation logical water and change are pulled down.

14. The utility model provides a filter core structure, the third adapter is equipped with the mounting groove outward, the sealing washer is located in the mounting groove, the installation of the sealing washer of being convenient for.

15. The utility model provides a water purifier, include filter core structure, this water purifier is small, space utilization is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a cross-sectional view of a filter cartridge arrangement provided in embodiment 1 of the present invention;

FIG. 2 is a partial sectional view of the cartridge assembly of FIG. 1 when installed in a body of a water purifier;

FIG. 3 is a front view of the upper end cap shown in FIG. 1;

FIG. 4 is a top view of the upper end cap shown in FIG. 1;

FIG. 5 is a top view of the upper end cap of FIG. 1 mounted on a filter flask;

fig. 6 is an exploded view of a filter cartridge arrangement provided in example 1 of the present invention;

FIG. 7 is a schematic view of a portion of the structure of FIG. 1;

FIG. 8 is a cross-sectional view of the first sleeve of FIG. 1 assembled with a first adapter;

FIG. 9 is a top view of the first sleeve of FIG. 1 assembled with the first adapter;

FIG. 10 is a partial cross-sectional view of the first sleeve shown in FIG. 1;

FIG. 11 is a schematic view of the first sleeve shown in FIG. 1;

fig. 12 is a schematic structural view of the first adapter shown in fig. 1.

Description of reference numerals:

1-a filter flask; 1 a-bone block; 2-bottle cap; 3-a first filter material; 4-upper end cover; 4 a-positioning bone; 5-a framework; 6-lower end cover; 7-a first sleeve; 7 a-L-shaped bone; 7 b-a positioning groove; 8-a second filter material; 9-lower cover plate; 10-an upper cover plate; 11-a second sleeve; 11 a-a convex bone; 12-a third filter material; 13-sleeve cover; 14-a check valve; 15-a third adapter; 16-a second adapter; 17-a first swivel joint; 17 a-transverse bone; 17 b-a bump; 18-a spring; 19-a first water circuit; 19 a-a first water inlet channel; 19 b-a first outlet channel; 20-a second waterway; 20 a-a second water inlet channel; 20 b-second water outlet channel.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

This example provides a specific embodiment of a filter cartridge arrangement, as shown in fig. 1-12, comprising: the filter flask comprises a filter flask 1, a first filter material structure, a first sleeve 7, a second filter material structure, an adapter assembly, a second sleeve 11 and a sleeve cover 13.

Wherein filter flask 1 is the equal open-ended structure in both ends, and is concrete, and filter flask 1 has a plurality of step portions including being straight pipy body, the first end of filter flask 1, makes filter flask 1's open area reduce step by step, and the open area of filter flask 1's second end equals with the inside area of body.

The first filter structure is arranged in the filter bottle 1 and forms a first water inlet channel 19a with the inner wall of the filter bottle 1. In the present embodiment, the first filter structure includes the annular first filter 3 and the annular frame 5, the frame 5 is disposed inside the first filter 3, the frame 5 is formed with water holes, and the frame 5 can support the first filter 3 to prevent the first filter 3 from deforming. In other alternative embodiments, when the first filter 3 is a harder material, the skeleton 5 may not be provided.

In order to facilitate the positioning and installation of the first filter material structure, a positioning component for positioning the first filter material structure is arranged in the filter bottle 1. Specifically, the locating component comprises a lower end cover 6 and an upper end cover 4, the lower end cover 6 is connected with the adapter component in a matched and clamped mode, a first groove suitable for embedding of a first end of the first filter material structure is formed in the lower end cover 6, the upper end cover 4 is sleeved outside the first sleeve 7, and a second groove suitable for embedding of a second end of the first filter material structure is formed in the upper end cover 4. The first filter material structure is clamped between the first groove and the second groove. A bone block 1a is arranged at the first end of the body in the filter flask 1, and the lower end cover 6 is propped against the bone block 1 a.

As shown in fig. 3 to 5, the upper end cap 4 is provided with a plurality of positioning ribs 4a, the positioning ribs 4a are adapted to be inserted into a gap between the upper end cap 4 and the filter flask 1, the positioning ribs 4a can further prevent the first filter medium structure from inclining in the filter flask 1, and in the present embodiment, a plurality of positioning ribs 4a are uniformly provided in the circumferential direction.

The first sleeve 7 is arranged in the first filter material structure and forms a first water outlet channel 19b with the first filter material structure, the first sleeve 7 is used for isolating a first water channel 19 formed by the first water inlet channel 19a and the first water outlet channel 19b and a second water channel 20 formed by the second water inlet channel 20a and the second water outlet channel 20b, so that water in different water channels can meet different requirements, and the first sleeve 7 can be used for supporting and installing the adapter assembly.

The second filter structure is arranged in the first sleeve 7, a second water inlet channel 20a is formed between the second filter structure and the first sleeve 7, and a second water outlet channel 20b is formed inside the second filter structure. In the present embodiment, the second filter structure includes the second filter 8 and the third filter 12, the third filter 12 is disposed at a downstream position of the second filter 8, the second water outlet channel 20b is formed in the second filter 8 and the third filter 12, the second filter structure is a composite structure of the second filter 8 and the third filter 12, water enters the second water inlet channel 20a through the second water inlet end, and is filtered by the second filter 8 and then by the third filter 12, and the purity of the water flowing out through the second water outlet channel 20b is higher. In other alternative embodiments, the second filter structure may comprise only the second filter 8.

The second sleeve 11 is arranged outside the third filter material 12, a second water inlet channel 20a is formed between the second sleeve 11 and the first sleeve 7, the second sleeve 11 is arranged to prevent water in the second water inlet channel 20a from directly entering the third filter material 12, and meanwhile, the second sleeve 11 can be made into the third filter material 12 to prevent the third filter material 12 from deforming.

One end of the third filter material 12 is provided with a sleeve cover 13, a second water inlet channel 20a is formed between the sleeve cover 13 and the first sleeve 7, a channel communicated with the second water outlet channel 20b and the second water outlet end is arranged in the sleeve cover 13, the sleeve cover 13 can further prevent water in the second water inlet channel 20a from entering the third filter material 12, and meanwhile, water filtered by the third filter material 12 can only flow out from the second water outlet end.

With further reference to fig. 1, the second sleeve 11 is externally provided with a plurality of ribs 11a facing the first sleeve 7, which can prevent the first sleeve 7 from collapsing and deforming due to too high water pressure in the first water inlet passage 19a and the first water outlet passage 19 b.

The first end of the second filter material 8 is provided with a lower cover plate 9, the lower cover plate 9 is covered on the second filter material 8 and is in sealing connection with one end, close to the bottle cap 2, of the first sleeve 7, the second end of the second filter material 8 is provided with an upper cover plate 10, the upper cover plate 10 is covered on the second filter material 8, a through hole communicated with the second water outlet channel 20b is formed in the upper cover plate 10, and the second sleeve 11 is in sealing connection with the upper cover plate 10.

The adapter assembly is arranged at the first end of the filter bottle 1, a first water inlet end communicated with the first water inlet channel 19a is formed between the adapter assembly and the filter bottle 1, and a first water outlet end communicated with the first water outlet channel 19b, a second water inlet end communicated with the second water inlet channel 20a and a second water outlet end communicated with the second water outlet channel 20b are respectively arranged in the adapter assembly.

In the present embodiment, the adapter assembly includes a first adapter 17, a second adapter 16, and a third adapter 15. A second water outlet end is formed in the first rotating joint 17, the first rotating joint 17 is in matched clamping connection with the first sleeve 7, and the first rotating joint 17 is hermetically arranged outside the sleeve cover 13 in a sealing mode.

Specifically, the inner wall of the first sleeve 7 is provided with an L-shaped bone 7A, a positioning groove 7b is formed in the L-shaped bone 7A, a transverse bone 17A is arranged on the first adapter 17, a protrusion 17b is arranged on the transverse bone 17A, the protrusion 17b is suitable for being clamped into the positioning groove 7b, the first sleeve 7 and the first adapter 17 are assembled in a rotating mode, and the assembling mode is simple and convenient.

In order to prevent the filtered pure water from reversely entering the third filter material 12, a check valve 14 is arranged between the first adapter 17 and the sleeve cover 13. In the using process, the check valve 14 can be electrically connected with the controller, when the water outlet faucet is closed, a high water pressure value is generated in a water path between the faucet and the filter element, the high water pressure value is sensed by a pressure switch of the check valve 14 and then fed back to the controller, and the controller controls the water purifier to stop water production.

The second adapter 16 is sleeved outside the first adapter 17, the third adapter 15 is sleeved outside the second adapter 16, a first water inlet end is formed between the third adapter 15 and the filter bottle 1, a first water outlet end is formed between the second adapter 16 and the third adapter 15, a second water inlet end is formed between the second adapter 16 and the first adapter 17, an elastic part is arranged between the second adapter 16 and the first adapter 17, specifically, the elastic part is a spring 18, the second adapter 16 and the third adapter 15 have a working state for enabling the first water inlet end to be conducted, and an initial state for enabling the first water inlet end to be disconnected. When on the organism with this filter core structure installation purifier, second adapter 16 can be supported to the structure on the organism, and second adapter 16, the removal of third adapter 15 make the elastic component compressed, and first inhalant canal 19a switches on automatically, and this filter core structure is when leaving the organism, and the elastic component makes second adapter 16, the automatic re-setting of third adapter 15, and the disconnection of first inhalant canal 19a can automatic lock water.

At least the third adapter 15 is provided with a sealing ring outside, so that when the third adapter 15 is in an initial state, the third adapter 15 is in sealing connection with the filter bottle 1. Specifically, the first adapter 17, the second adapter 16, and the third adapter 15 are all provided with a sealing ring. The setting of sealing washer can make this filter core structure automatic stagnant water when the installation is led to water and is changed and pull down.

Specifically, a mounting groove is formed outside the third adapter 15, and the sealing ring is located in the mounting groove.

Bottle lid 2 is sealed to be set up at the second end of filter flask 1, and is specific, and bottle lid 2 accessible threaded connection's mode is connected with filter flask 1, also can be connected with filter flask 1 through spin-melt welding's mode. Certain clearance all has between bottle lid 2 and upper end cap 4, first sleeve 7, the lower cover plate 9, and when installation bottle lid 2, bottle lid 2 does not contact with the part in the filter flask 1, can not drive the part rotation in the filter flask 1 to can not cause the damage of part in the filter flask 1.

When the filter element structure is assembled, the second filter material 8 and the third filter material 12 are assembled into the second filter material structure, the first sleeve 7 is sleeved outside the second filter material structure, the first filter material structure is sleeved outside the first sleeve 7, the adapter assembly is installed, then the assembled structures are installed in the filter bottle 1, and the bottle cap 2 is sealed at the second end of the filter bottle 1. Because first filter media structure, second filter media structure integration are in filter flask 1, the combined filter core structure as an organic whole, change and easy maintenance, can reduce the purifier volume, improve space utilization to this filter core structure has two and intakes end, two play water ends, can satisfy multiple water demand.

Example 2

The embodiment provides a water purifier, including the filter core structure that the embodiment provided. The water purifier has small volume and high space utilization rate.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims (17)

1. A filter cartridge arrangement, comprising:

a filter flask (1);

the first filter material structure is arranged in the filter bottle (1) and forms a first water inlet channel (19a) with the inner wall of the filter bottle (1);

the first sleeve (7) is arranged in the first filter material structure, and a first water outlet channel (19b) is formed between the first sleeve and the first filter material structure;

the second filter material structure is arranged in the first sleeve (7), a second water inlet channel (20a) is formed between the second filter material structure and the first sleeve (7), and a second water outlet channel (20b) is formed in the second filter material structure;

the adapter assembly is arranged at the first end of the filter bottle (1), a first water inlet end communicated with the first water inlet channel (19a) is formed between the adapter assembly and the filter bottle (1), and a first water outlet end communicated with the first water outlet channel (19b), a second water inlet end communicated with the second water inlet channel (20a) and a second water outlet end communicated with the second water outlet channel (20b) are respectively arranged in the adapter assembly;

and the bottle cap (2) is arranged at the second end of the filter bottle (1) in a sealing manner.

2. The filter cartridge arrangement according to claim 1, wherein a positioning assembly is provided in the filter bottle (1) for positioning the first filter means.

3. The filter cartridge arrangement of claim 2, wherein the positioning assembly comprises:

the lower end cover (6) is matched and clamped with the adapter assembly, and a first groove suitable for embedding the first end of the first filter material structure is formed in the lower end cover (6);

and the upper end cover (4) is sleeved outside the first sleeve (7), and a second groove suitable for embedding the second end of the first filter material structure is formed in the upper end cover (4).

4. The filter cartridge arrangement according to claim 3, wherein the upper end cap (4) is provided with a plurality of positioning ribs (4a), the positioning ribs (4a) being adapted to be inserted into a gap between the upper end cap (4) and the filter flask (1).

5. The filter cartridge arrangement of any of claims 1-4, wherein the first filter arrangement includes:

a first filter material (3) having a ring shape;

the framework (5) is annular and is arranged on the inner side of the first filter material (3), and water through holes are formed in the framework (5).

6. Filter element arrangement according to any one of claims 1-4, wherein the second filter element arrangement comprises a second filter element (8) and a third filter element (12), the third filter element (12) being provided at a position downstream of the second filter element (8), the second outlet passage (20b) being formed in each of the second filter element (8) and the third filter element (12).

7. Filter element arrangement according to claim 6, wherein a second sleeve (11) is provided outside the third filter medium (12), the second water inlet channel (20a) being formed between the second sleeve (11) and the first sleeve (7).

8. Cartridge structure according to claim 7, wherein the second sleeve (11) is externally provided with a plurality of ribs (11a) directed towards the first sleeve (7).

9. The filter element structure as recited in claim 7, wherein a lower cover plate (9) is disposed at a first end of the second filter element (8), the lower cover plate (9) is disposed on the second filter element (8) and is hermetically connected with one end of the first sleeve (7) close to the bottle cap (2), an upper cover plate (10) is disposed at a second end of the second filter element (8), the upper cover plate (10) is disposed on the second filter element (8), a through hole communicated with the second water outlet channel (20b) is formed in the upper cover plate (10), and the second sleeve (11) is hermetically connected with the upper cover plate (10).

10. The filter element structure of claim 6, wherein a sleeve cover (13) is arranged at one end of the third filter material (12), the second water inlet channel (20a) is formed between the sleeve cover (13) and the first sleeve (7), and a channel communicated with the second water outlet channel (20b) and the second water outlet end is arranged in the sleeve cover (13).

11. The filter element structure of claim 10, wherein the adapter assembly comprises a first adapter (17), the second water outlet end is formed in the first adapter (17), the first adapter (17) is in fit clamping connection with the first sleeve (7), and the first adapter (17) is hermetically sleeved outside the sleeve cover (13).

12. The filter element structure according to claim 11, wherein the inner wall of the first sleeve (7) is provided with an L-shaped rib (7a), the L-shaped rib (7a) is provided with a positioning groove (7b), the first adapter (17) is provided with a transverse rib (17a), the transverse rib (17a) is provided with a protrusion (17b), and the protrusion (17b) is suitable for being clamped into the positioning groove (7 b).

13. Cartridge arrangement according to claim 11, wherein a non-return valve (14) is provided between the first swivel joint (17) and the sleeve cover (13).

14. Filter element arrangement according to claim 11, wherein the adapter assembly further comprises a second adapter (16) fitted over the first adapter (17), a third adapter (15) fitted over the second adapter (16), the first water inlet end is formed between the third adapter (15) and the filter flask (1), the second adapter (16) and the third adapter (15) form a first water outlet end, the second water inlet end is formed between the second adapter (16) and the first adapter (17), an elastic piece is arranged between the second adapter (16) and the first adapter (17), the second adapter (16) and the third adapter (15) have a working state for enabling the first water inlet end to be connected and an initial state for enabling the first water inlet end to be disconnected.

15. A filter element arrangement according to claim 14, characterised in that at least the third adapter (15) is provided with a sealing ring outside, so that the third adapter (15) is in sealing connection with the filter flask (1) when the third adapter (15) is in the initial state.

16. A filter element arrangement as claimed in claim 15, characterised in that the third adapter (15) is externally provided with a mounting groove, the sealing ring being located in the mounting groove.

17. A water purification machine comprising a filter cartridge arrangement according to any one of claims 1 to 16.

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