CN210885555U

CN210885555U - Composite filter element

Info

Publication number: CN210885555U
Application number: CN201921513619.7U
Authority: CN
Inventors: 谢小军; 贺天山; 李超; 潘大伟
Original assignee: Zhongshan Sms Water Purification Technology Co ltd
Current assignee: Zhongshan Sms Water Purification Technology Co ltd
Priority date: 2019-09-12
Filing date: 2019-09-12
Publication date: 2020-06-30
Anticipated expiration: 2029-09-12

Abstract

The utility model relates to a composite filter element, which comprises a filter element shell, a rear filter element cylinder assembly, a water pumping pipe and a front filter element cylinder assembly; the filter element shell is internally provided with a rear water filtering chamber and a front water filtering chamber which are independent from each other, the upper end surface of the filter element shell is provided with a first water inlet, a first water outlet, a second water inlet and a second water outlet, and the second water inlet is communicated with the front water filtering chamber; the rear filter element cylinder assembly and the water pumping pipe are respectively arranged in the rear water filtering chamber, a water inlet of the rear filter element cylinder assembly is communicated with the first water inlet, a water inlet at the lower end of the water pumping pipe is communicated with the rear water filtering chamber, and a water outlet at the upper end of the water pumping pipe is communicated with the first water outlet; the front filter element cylinder assembly is arranged in the front water filtering chamber, and a water outlet of the front filter element cylinder assembly is communicated with the second water outlet. The water purifier has the advantages of water filtering chambers for storing water, no need of a water tank during use, small volume and convenience in use and placement.

Description

Composite filter element

Technical Field

The utility model relates to a composite filter element.

Background

Currently, water purifiers include a front-mounted filter element, a rear-mounted filter element, and a water tank. During the use, water tank, leading filter core and rearmounted filter core are installed respectively in the water purifier casing, and water tank, leading filter core and rearmounted filter core are occupying the installation space in the water purifier respectively, lead to the water purifier volume great, and the inconvenient installation of water purifier.

Disclosure of Invention

The utility model aims at overcoming the not enough and providing a composite filter core of prior art, water tank, leading filter core and rearmounted filter core are collected together, compact structure, simple to operate.

In order to achieve the above object, the first technical solution of the present invention is implemented as follows, which is a composite filter element, and is characterized by comprising:

a filter element housing; a rear water filtering chamber and a front water filtering chamber are arranged in the filter element shell, the rear water filtering chamber and the front water filtering chamber are independent, a first water inlet, a first water outlet, a second water inlet and a second water outlet are arranged on the upper end face of the filter element shell, and the second water inlet is communicated with the front water filtering chamber;

a filter element cylinder assembly and a water pumping pipe are arranged at the rear part; the rear filter element cylinder assembly and the water pumping pipe are respectively arranged in the rear water filtering chamber, the water inlet of the rear filter element cylinder assembly is communicated with the first water inlet, the water inlet at the lower end of the water pumping pipe is communicated with the rear water filtering chamber, the water outlet at the upper end of the water pumping pipe is communicated with the first water outlet, and water filtered by the rear filter element cylinder assembly is led to the first water outlet through the water pumping pipe; and

a pre-cartridge assembly; the front filter element cylinder assembly is arranged in the front water filtering chamber, and a water outlet of the front filter element cylinder assembly is communicated with the second water outlet, so that water in the front water filtering chamber is filtered by the front filter element cylinder assembly and then flows to the second water outlet.

In the technical scheme, the water level monitoring device further comprises a water level monitoring assembly; the water level monitoring assembly is mounted in the post-filtration chamber to detect the water level in the post-filtration chamber.

In the technical scheme, the water level monitoring assembly comprises an upper floating ball water level monitoring structure, a first longitudinal slideway cavity, a lower floating ball water level monitoring structure and a second longitudinal slideway cavity; the first longitudinal slideway cavity and the second longitudinal slideway cavity are arranged in the rear water filtering chamber, the first longitudinal slideway cavity and the second longitudinal slideway cavity are communicated with the rear water filtering chamber, the first longitudinal slideway cavity is positioned at the middle upper part of the rear water filtering chamber, the second longitudinal slideway cavity is positioned at the middle lower part of the rear water filtering chamber, the floating ball water level monitoring structure is positioned in the first longitudinal slideway cavity and can move longitudinally so as to monitor the high water level of the rear water filtering chamber, and the lower floating ball water level monitoring structure is positioned in the second longitudinal slideway cavity and can move longitudinally so as to monitor the low water level of the rear water filtering chamber; and the upper part of the filter element shell is provided with an air outlet communicated with the rear water filtering chamber.

In this technical scheme, the up end detachable of filter core casing installs the upper end at the filter core casing and sealed cooperation.

In the technical scheme, the rear filter element cylinder assembly comprises a rear filter cylinder, a rear filter element upper cover and a rear filter element lower cover; the rear filter cartridge is fixed between the upper cover of the rear filter cartridge and the lower cover of the rear filter cartridge, the upper part of the upper cover of the rear filter cartridge is installed on the upper end surface and is in sealing fit with the upper cover of the rear filter cartridge, a water inlet flow passage is arranged on the upper cover of the rear filter cartridge, a water inlet of the water inlet flow passage is communicated with a first water inlet, and a water outlet of the water inlet flow passage is communicated with a cartridge core of the rear filter cartridge.

In the technical scheme, the front filter element barrel assembly comprises a front filter cylinder, a front filter element upper cover and a front filter element lower cover; the pre-filter cartridge is fixed between the pre-filter cartridge upper cover and the pre-filter cartridge lower cover, the upper part of the pre-filter cartridge upper cover is arranged on the upper end surface and is in sealing fit with the upper end surface, a water outlet flow passage is arranged on the pre-filter cartridge upper cover, the water outlet of the water outlet flow passage is communicated with a second water outlet, and the water inlet of the water outlet flow passage is communicated with the cartridge core of the pre-filter cartridge.

In order to achieve the above object, the second technical solution of the present invention is implemented as follows, which is a composite filter element, and is characterized by comprising:

a filter element cylinder assembly, an end cover and a water pumping pipe are arranged at the rear part; the water pumping pipe and the rear filter element cylinder assembly are respectively positioned in the rear water filtering chamber, a water inlet at the lower part of the water pumping pipe is positioned in a cylinder center of the rear filter element cylinder assembly, a water outlet at the upper part of the water pumping pipe is communicated with a first water outlet, so that water filtered by the rear filter element cylinder assembly is led to the first water outlet through the water pumping pipe; and

In this technical scheme, the up end detachable of filter core casing installs at filter core casing upper end and sealed cooperation.

In this technical scheme, still include the inlet tube, the inlet tube is arranged in rearmounted drainage cavity, and the water inlet and the first water inlet intercommunication on inlet tube upper portion, the delivery port and the rearmounted drainage cavity intercommunication of inlet tube lower part.

In the technical scheme, the rear filter element cylinder assembly comprises a rear filter cylinder, a rear filter element upper cover and a rear filter element lower cover; the rear filter cylinder is fixed between the upper cover of the rear filter element and the lower cover of the rear filter element,

be equipped with the jack on the rearmounted filter core upper cover, the drinking-water pipe inserts in the jack and the outer wall of drinking-water pipe and the sealed cooperation of the inner wall of jack, and the water inlet of drinking-water pipe lower part is arranged in the section of thick bamboo core of rearmounted section of thick bamboo.

Compared with the prior art, the utility model the advantage do: the water tank, the front filter element and the rear filter element are integrated together, the structure is compact, and the installation is convenient.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention;

fig. 2 is a bottom view of the first embodiment of the present invention;

FIG. 3 is an enlarged sectional view A-A of FIG. 2;

FIG. 4 is an enlarged sectional view B-B of FIG. 2;

FIG. 5 is an enlarged cross-sectional view of C-C of FIG. 2;

fig. 6 is a front view of a first embodiment of the present invention;

FIG. 7 is an enlarged cross-sectional view of D-D of FIG. 6;

fig. 8 is a schematic structural diagram of a second embodiment of the present invention;

fig. 9 is a bottom view of the second embodiment of the present invention;

FIG. 10 is an enlarged cross-sectional view E-E of FIG. 9;

FIG. 11 is an enlarged cross-sectional view F-F of FIG. 9;

FIG. 12 is an enlarged sectional view G-G of FIG. 9;

fig. 13 is a front view of a second embodiment of the present invention;

fig. 14 is an enlarged sectional view of H-H of fig. 13.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. Furthermore, the technical features mentioned in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

In the description of the present invention, the terms "upper", "lower", "middle-lower" and "middle-upper" indicate the position or positional relationship based on the position or positional relationship shown in the drawings, which is only for convenience of description of the present invention and does not require the present invention to be constructed and operated in a specific position, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Example one

As shown in fig. 1 to 7, it is a composite filter element comprising:

a cartridge housing 12; a rear water filtering chamber 121 and a front water filtering chamber 122 are arranged in the filter element shell 12, the rear water filtering chamber 121 and the front water filtering chamber 122 are independent, a first water inlet 111, a first water outlet 112, a second water inlet 113 and a second water outlet 114 are arranged on the upper end surface 11 of the filter element shell 12, and the second water inlet 113 is communicated with the front water filtering chamber 122;

a filter element cylinder component 3 and a water pumping pipe 7 are arranged at the rear part; the rear filter element cylinder assembly 3 and the water pumping pipe 7 are respectively arranged in a rear water filtering chamber 121, a water inlet of the rear filter element cylinder assembly 3 is communicated with a first water inlet 111, a water inlet at the lower end of the water pumping pipe 7 is communicated with the rear water filtering chamber 121, a water outlet at the upper end of the water pumping pipe 7 is communicated with a first water outlet 112, and water filtered by the rear filter element cylinder assembly 3 is led to the first water outlet 112 through the water pumping pipe 7; and

a front filter element cylinder component 4; the front filter element cartridge assembly 4 is installed in the front water filtering chamber 122, and a water outlet of the front filter element cartridge assembly 4 is communicated with the second water outlet 114, so that water in the front water filtering chamber 122 is filtered by the front filter element cartridge assembly 4 and then is led to the second water outlet 114.

When the water tank works, water passing through the first water outlet 112 firstly enters the post-filter element cylinder assembly 3, the water filtered by the post-filter element cylinder assembly 3 enters the post-filtering water chamber 121, the post-filtering water chamber 121 plays a role of a water tank, and the water in the post-filtering water chamber 121 is discharged through the water pumping pipe 7; the water passing through the second water inlet 113 enters the pre-filtering chamber 122 first, the pre-filtering chamber 122 also functions as a water tank, and the water in the pre-filtering chamber 122 is filtered by the pre-filter cartridge assembly 4 and then discharged through the water outlet of the pre-filter cartridge assembly 4.

In the embodiment, the water level monitoring assembly 2 is also included; the water level monitoring assembly 2 is installed in the post-filtering water chamber 121 to detect the water level in the post-filtering water chamber 121.

In this embodiment, the water level monitoring assembly 2 includes an upper floating ball water level monitoring structure 21, a first longitudinal slide cavity 22, a lower floating ball water level monitoring structure 24, and a second longitudinal slide cavity 23; the first longitudinal slide way cavity 22 and the second longitudinal slide way cavity 23 are installed in the rear water filtering chamber 121, the first longitudinal slide way cavity 22 and the second longitudinal slide way cavity 23 are communicated with the rear water filtering chamber 121, the first longitudinal slide way cavity 22 is located at the middle upper part of the rear water filtering chamber 121, the second longitudinal slide way cavity 23 is located at the middle lower part of the rear water filtering chamber 121, the upward floating ball water level monitoring structure 21 is located in the first longitudinal slide way cavity 22 and can move longitudinally so as to monitor the high water level of the rear water filtering chamber 121, and the downward floating ball water level monitoring structure 24 is located in the second longitudinal slide way cavity 23 and can move longitudinally so as to monitor the low water level of the rear water filtering chamber 121; the upper part of the filter element shell 12 is provided with an air outlet 115 communicated with the rear water filtering chamber 121, and the air outlet 115 plays a role of pressure relief, so that the upper floating ball water level monitoring structure 21 and the lower floating ball water level monitoring structure 24 work normally. The types of the upper floating ball water level monitoring structure 21 and the lower floating ball water level monitoring structure 24 can be FB-D2411, FB-D3008, FB-231515 or FB-D301610, and a user can select other types of the upper floating ball water level monitoring structure 21 and the lower floating ball water level monitoring structure 24 according to actual conditions.

In this embodiment, the upper end face 11 of the cartridge housing 12 is removably mounted to the upper end of the cartridge housing 12 and sealingly engaged.

In the present embodiment, the rear filter cartridge assembly 3 includes a rear filter cartridge 31, a rear filter upper cover 32 and a rear filter lower cover 34; the rear filter cartridge 31 is fixed between a rear filter element upper cover 32 and a rear filter element lower cover 34, the upper part of the rear filter element upper cover 32 is mounted on the upper end surface 11 and is in sealing fit with the upper end surface, a water inlet flow passage 33 is arranged on the rear filter element upper cover 32, a water inlet of the water inlet flow passage 33 is communicated with the first water inlet 111, and a water outlet of the water inlet flow passage 33 is communicated with the cartridge center of the rear filter cartridge 31.

In the present embodiment, the front filter cartridge assembly 4 includes a front filter cartridge 41, a front filter upper cover 42 and a front filter lower cover 44; the front filter cartridge 41 is fixed between a front filter element upper cover 42 and a front filter element lower cover 44, the upper part of the front filter element upper cover 42 is installed on the upper end surface 11 and is in sealing fit with the upper end surface, a water outlet flow passage 43 is arranged on the front filter element upper cover 42, the water outlet of the water outlet flow passage 43 is communicated with a second water outlet 114, and the water inlet of the water outlet flow passage 43 is communicated with the cartridge center of the front filter cartridge 41.

Example two

As shown in fig. 8 to 14, it is a composite filter element comprising:

a cartridge housing 12; a rear water filtering chamber 121 and a front water filtering chamber 122 are arranged in the filter element shell 12, the rear water filtering chamber 121 and the front water filtering chamber 122 are independent of each other, a first water inlet 111, a first water outlet 112, a second water inlet 113 and a second water outlet 114 are arranged on the filter element shell 12, the first water inlet 111 is communicated with the rear water filtering chamber 121, and the second water inlet 113 is communicated with the front water filtering chamber 122;

a filter element cylinder component 3, an end cover 6 and a water pumping pipe 7 are arranged at the rear part; the water pumping pipe 7 and the rear filter element cylinder assembly 3 are respectively positioned in the rear water filtering chamber 121, a water inlet at the lower part of the water pumping pipe 7 is positioned in the cylinder core of the rear filter element cylinder assembly 3, a water outlet at the upper part of the water pumping pipe 7 is communicated with the first water outlet 112, so that water filtered by the rear filter element cylinder assembly 3 is led to the first water outlet 112 through the water pumping pipe 7; and

When the water tank works, water passing through the first water outlet 112 firstly enters the post-filter water chamber 121, the water in the post-filter water chamber 121 is filtered by the post-filter element cylinder assembly 3 and then is discharged through the water pumping pipe 7, and the post-filter water chamber 121 plays a role of a water tank; the water passing through the second water inlet 113 enters the pre-filtering chamber 122 first, the pre-filtering chamber 122 also functions as a water tank, and the water in the pre-filtering chamber 122 is filtered by the pre-filter cartridge assembly 4 and then discharged through the water outlet of the pre-filter cartridge assembly 4.

In this embodiment, the water level monitoring assembly 2 includes an upper floating ball water level monitoring structure 21, a first longitudinal slide cavity 22, a lower floating ball water level monitoring structure 24, and a second longitudinal slide cavity 23; the first longitudinal slide way cavity 22 and the second longitudinal slide way cavity 23 are installed in the rear water filtering chamber 121, the first longitudinal slide way cavity 22 and the second longitudinal slide way cavity 23 are communicated with the rear water filtering chamber 121, the first longitudinal slide way cavity 22 is located at the middle upper part of the rear water filtering chamber 121, the second longitudinal slide way cavity 23 is located at the middle lower part of the rear water filtering chamber 121, the upward floating ball water level monitoring structure 21 is located in the first longitudinal slide way cavity 22 and can move longitudinally so as to monitor the high water level of the rear water filtering chamber 121, and the downward floating ball water level monitoring structure 24 is located in the second longitudinal slide way cavity 23 and can move longitudinally so as to monitor the low water level of the rear water filtering chamber 121; the upper part of the filter element shell 12 is provided with an air outlet 115 communicated with the rear water filtering chamber 121, and the air outlet 115 plays a role of pressure relief, so that the upper floating ball water level monitoring structure 21 and the lower floating ball water level monitoring structure 24 work normally. The types of the upper floating ball water level monitoring structure 21 and the lower floating ball water level monitoring structure 24 can be FB-D2411, FB-D3008, FB-231515 or FB-D301610, and users can also use other types of the upper floating ball water level monitoring structure 21 and the lower floating ball water level monitoring structure 24 according to actual requirements.

In this embodiment, the upper end face 11 of the cartridge housing 12 is removably mounted to the upper end of the cartridge housing 12 and sealingly engaged therewith.

In this embodiment, still include inlet tube 8, inlet tube 8 is arranged in rearmounted drainage chamber 121, and the water inlet on inlet tube 8 upper portion communicates with first water inlet 111, and the delivery port of inlet tube 8 lower part communicates with rearmounted drainage chamber 121.

In the present embodiment, the rear filter cartridge assembly 3 includes a rear filter cartridge 31, a rear filter upper cover 32 and a rear filter lower cover 34; the postposition filter cylinder 31 is fixed between a postposition filter core upper cover 32 and a postposition filter core lower cover 34, a jack 35 is arranged on the postposition filter core upper cover 32, the water pumping pipe 7 is inserted into the jack 35, the outer wall of the water pumping pipe 7 is in sealing fit with the inner wall of the jack 35, and a water inlet at the lower part of the water pumping pipe 7 is positioned in the cylinder center of the postposition filter cylinder 31.

The embodiments of the present invention are described in detail with reference to the drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in the embodiments without departing from the principles and spirit of the invention.

Claims

1. A composite filter element, comprising:

a cartridge housing (12); a rear water filtering chamber (121) and a front water filtering chamber (122) are arranged in the filter element shell (12), the rear water filtering chamber (121) and the front water filtering chamber (122) are mutually independent, a first water inlet (111), a first water outlet (112), a second water inlet (113) and a second water outlet (114) are arranged on the upper end surface (11) of the filter element shell (12), and the second water inlet (113) is communicated with the front water filtering chamber (122);

a filter element cylinder assembly (3) and a water pumping pipe (7) are arranged at the rear part; the rear filter element cylinder assembly (3) and the water pumping pipe (7) are respectively arranged in a rear water filtering chamber (121), a water inlet of the rear filter element cylinder assembly (3) is communicated with a first water inlet (111), a water inlet at the lower end of the water pumping pipe (7) is communicated with the rear water filtering chamber (121), a water outlet at the upper end of the water pumping pipe (7) is communicated with a first water outlet (112), so that water filtered by the rear filter element cylinder assembly (3) is led to the first water outlet (112) through the water pumping pipe (7); and

a pre-cartridge assembly (4); the pre-filter cartridge assembly (4) is arranged in the pre-filter chamber (122), the water outlet of the pre-filter cartridge assembly (4) is communicated with the second water outlet (114), so that water in the pre-filter chamber (122) is filtered by the pre-filter cartridge assembly (4) and then is led to the second water outlet (114).

2. The composite filter element according to claim 1, characterized by further comprising a water level monitoring assembly (2); the water level monitoring assembly (2) is installed in the post-filtering water chamber (121) so as to detect the water level in the post-filtering water chamber (121).

3. The composite filter element according to claim 2, characterized in that the water level monitoring assembly (2) comprises an upper floating ball water level monitoring structure (21), a first longitudinal slide cavity (22), a lower floating ball water level monitoring structure (24) and a second longitudinal slide cavity (23); the first longitudinal slide way cavity (22) and the second longitudinal slide way cavity (23) are installed in the rear water filtering chamber (121), the first longitudinal slide way cavity (22) and the second longitudinal slide way cavity (23) are communicated with the rear water filtering chamber (121), the first longitudinal slide way cavity (22) is located at the middle upper part of the rear water filtering chamber (121), the second longitudinal slide way cavity (23) is located at the middle lower part of the rear water filtering chamber (121), the floating ball water level monitoring structure (21) is located in the first longitudinal slide way cavity (22) and can move longitudinally so as to monitor the high water level of the rear water filtering chamber (121), and the floating ball water level monitoring structure (24) is located in the second longitudinal slide way cavity (23) and can move longitudinally so as to monitor the low water level of the rear water filtering chamber (121); and the upper part of the filter element shell (12) is provided with an air outlet (115) communicated with the rear water filtering chamber (121).

4. A composite filter element according to claim 1, wherein the upper end face (11) of the filter element housing (12) is removably mounted in sealing engagement with the upper end of the filter element housing (12).

5. The composite filter element according to claim 4, characterized in that the post-cartridge assembly (3) comprises a post-cartridge (31), a post-cartridge upper cover (32) and a post-cartridge lower cover (34); the rear filter cartridge (31) is fixed between a rear filter element upper cover (32) and a rear filter element lower cover (34), the upper portion of the rear filter element upper cover (32) is installed on the upper end face (11) and is in sealing fit with the upper end face, a water inlet flow channel (33) is arranged on the rear filter element upper cover (32), a water inlet of the water inlet flow channel (33) is communicated with the first water inlet (111), and a water outlet of the water inlet flow channel (33) is communicated with the cartridge center of the rear filter cartridge (31).

6. The composite filter element according to claim 4, characterized in that the pre-filter cartridge assembly (4) comprises a pre-filter cartridge (41), a pre-filter upper cover (42) and a pre-filter lower cover (44); the pre-filter cartridge (41) is fixed between a pre-filter element upper cover (42) and a pre-filter element lower cover (44), the upper part of the pre-filter element upper cover (42) is installed on the upper end surface (11) and is in sealing fit with the upper end surface, a water outlet flow channel (43) is arranged on the pre-filter element upper cover (42), a water outlet of the water outlet flow channel (43) is communicated with a second water outlet (114), and a water inlet of the water outlet flow channel (43) is communicated with the cartridge center of the pre-filter cartridge (41).

7. A composite filter element, comprising:

a rear filter element cylinder assembly (3), an end cover (6) and a water pumping pipe (7); the water pumping pipe (7) and the rear filter element cylinder assembly (3) are respectively positioned in the rear water filtering chamber (121), a water inlet at the lower part of the water pumping pipe (7) is positioned in the cylinder core of the rear filter element cylinder assembly (3), a water outlet at the upper part of the water pumping pipe (7) is communicated with the first water outlet (112), so that water filtered by the rear filter element cylinder assembly (3) is led to the first water outlet (112) through the water pumping pipe (7); and

8. The composite filter element according to claim 7, characterized by further comprising a water level monitoring assembly (2); the water level monitoring assembly (2) is installed in the post-filtering water chamber (121) so as to detect the water level in the post-filtering water chamber (121).

9. The composite filter element according to claim 7, characterized in that the water level monitoring assembly (2) comprises an upper floating ball water level monitoring structure (21), a first longitudinal slide cavity (22), a lower floating ball water level monitoring structure (24) and a second longitudinal slide cavity (23); the first longitudinal slide way cavity (22) and the second longitudinal slide way cavity (23) are installed in the rear water filtering chamber (121), the first longitudinal slide way cavity (22) and the second longitudinal slide way cavity (23) are communicated with the rear water filtering chamber (121), the first longitudinal slide way cavity (22) is located at the middle upper part of the rear water filtering chamber (121), the second longitudinal slide way cavity (23) is located at the middle lower part of the rear water filtering chamber (121), the floating ball water level monitoring structure (21) is located in the first longitudinal slide way cavity (22) and can move longitudinally so as to monitor the high water level of the rear water filtering chamber (121), and the floating ball water level monitoring structure (24) is located in the second longitudinal slide way cavity (23) and can move longitudinally so as to monitor the low water level of the rear water filtering chamber (121); and the upper part of the filter element shell (12) is provided with an air outlet (115) communicated with the rear water filtering chamber (121).

10. A composite filter element according to claim 7, characterised in that the upper end face (11) of the filter element housing (12) is removably mounted on the upper end of the filter element housing (12) and sealingly engaged therewith.

11. The composite filter element according to claim 7, further comprising a water inlet pipe (8), wherein the water inlet pipe (8) is positioned in the post-filtering water chamber (121), a water inlet at the upper part of the water inlet pipe (8) is communicated with the first water inlet (111), and a water outlet at the lower part of the water inlet pipe (8) is communicated with the post-filtering water chamber (121).

12. The composite filter element according to claim 7, characterized in that the post-cartridge assembly (3) comprises a post-cartridge (31), a post-cartridge upper cover (32) and a post-cartridge lower cover (34); the rear filter cylinder (31) is fixed between the rear filter core upper cover (32) and the rear filter core lower cover (34),

be equipped with jack (35) on rearmounted filter core upper cover (32), the inner wall of the outer wall that draws water pipe (7) and jack (35) and draw water pipe (7) in inserting jack (35) sealed cooperation, the water inlet of drawing water pipe (7) lower part is arranged in the core of a section of thick bamboo of rearmounted filter cylinder (31).

13. The composite filter element according to claim 10, wherein the pre-filter cartridge assembly (4) comprises a pre-filter cartridge (41), a pre-filter upper cover (42) and a pre-filter lower cover (44); the pre-filter cartridge (41) is fixed between a pre-filter element upper cover (42) and a pre-filter element lower cover (44), the upper part of the pre-filter element upper cover (42) is installed on the upper end surface (11) and is in sealing fit with the upper end surface, a water outlet flow channel (43) is arranged on the pre-filter element upper cover (42), a water outlet of the water outlet flow channel (43) is communicated with a second water outlet (114), and a water inlet of the water outlet flow channel (43) is communicated with the cartridge center of the pre-filter cartridge (41).