CN220300474U - Composite filter element, waterway system of water purifying equipment and water purifying equipment - Google Patents

Abstract

A composite filter element comprises a shell, wherein a first water inlet and a water outlet are formed in the shell; the first filter module is accommodated in the shell and positioned on the water flow path of the first water inlet and the water outlet; the second filter module is accommodated in the shell, and the filter precision of the second filter module is smaller than that of the first filter module; the method is characterized in that: the shell is also provided with a second water inlet, and the second filtering module is positioned on a water flow path between the second water inlet and the water outlet, so that at least two kinds of purified water with different mineral contents can be filtered. The utility model provides a water purification unit's waterway system, includes governing valve, its characterized in that: the composite filter element is applied, and the regulating valve is communicated with the first water inlet. Also relates to a water purifying device.

Description

Composite filter element, waterway system of water purifying equipment and water purifying equipment

Technical Field

The utility model relates to water purifying equipment, in particular to a composite filter element, a waterway system of the water purifying equipment with the composite filter element, and the water purifying equipment with the waterway system of the water purifying equipment.

Background

In the water purifying apparatus, a filter core is used as a core member for filtering water. The filter element is classified by the filtering precision of the filter material, and the existing filter element is divided into a plurality of types of rough filtration, micro filtration, ultrafiltration, nanofiltration and reverse osmosis. The rough filtration is usually a pre-filter of stainless steel net, the filtration precision is about 30-40 microns, and only silt rust and worm eggs can be filtered out. The micro-filtration is generally a ceramic filter element or a pp cotton filter element, the filtering precision is 1-20 microns, partial bacteria and organic matters can be filtered, residual chlorine, chromaticity and turbidity in tap water can be absorbed by combining the micro-filtration with active carbon, and the micro-filtration is generally used as a front-mounted or tap water purifier. The ultrafiltration accuracy is about 0.01 micron, and bacteria, organic matters, partial viruses and heavy metals in the water can be filtered. Nanofiltration has a filtration accuracy of about 0.001 microns and is capable of filtering out not only bacteria, viruses, organics, but also some antibiotics, inorganic substances and heavy metals. The reverse osmosis has the filtering precision of about 0.0001 micron, can filter out all harmful substances and inorganic mineral substances in water, only retains trace elements with the diameter smaller than 0.0001 micron, and can drink water directly.

In order to improve the water purifying effect, the existing water purifying equipment generally adopts a combination of filter elements with different multi-stage filtering precision to treat water. Because the water outlets and the water inlets among different filter element components are connected through external pipelines, the internal pipelines of the water purifying equipment are numerous and miscellaneous, the volume of the water purifying equipment is larger, and the water purifying equipment is inconvenient to install and use; moreover, the filter element needs to be replaced regularly, but the service lives of different filter elements are different, so that the filter element is inconvenient to replace.

In order to solve the problems, a composite filter element integrated in a cylindrical shell by a multi-stage filter element assembly is arranged at present, the space occupation of the water purifier can be greatly reduced, the installation and the use are more convenient, the composite filter element can be integrally replaced, and the filter element replacement is also more convenient. As disclosed in chinese patent No. ZL201921866766.2 (grant No. CN 210915578U), a composite filter element.

The higher the filtering precision of the filter element to water is, the lower the mineral ion retention rate in the water is. The composite filter element can only filter out purified water with single mineral ion retention rate, and the filtering precision of the composite filter element on water depends on the filtering module with highest filtering precision. However, with the attention of people on drinking water health, different people have different demands on mineral content in purified water, and the composite filter element cannot meet the demands of various users at the same time.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide a composite filter element capable of filtering out at least two purified water with different mineral contents, aiming at the state of the art.

The second technical problem to be solved by the utility model is to provide a waterway system of the water purifying equipment with the composite filter element aiming at the state of the art.

The third technical problem to be solved by the present utility model is to provide a water purifying device using the water path system of the water purifying device aiming at the above state of the art.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a composite filter element comprises a shell, wherein a first water inlet and a water outlet are formed in the shell;

the first filter module is accommodated in the shell and positioned on the water flow path of the first water inlet and the water outlet;

the second filter module is accommodated in the shell, and the filter precision of the second filter module is smaller than that of the first filter module;

the method is characterized in that: the shell is also provided with a second water inlet, and the second filtering module is positioned on a water flow path between the second water inlet and the water outlet.

In order to be convenient for form the water flow path of second filtration module, the inside of casing is equipped with the core shell, the inside of core shell forms the second appearance chamber that supplies second filtration module to hold wherein, just the inside of second appearance chamber is equipped with out water channel and is located out water channel outlying second water inlet channel, the water inlet end of second filtration module is through second water inlet channel and second water inlet fluid communication, the water outlet end of second filtration module is through water outlet channel and delivery port fluid communication.

In order to be convenient for form the water flow path of first filtration module, form the first appearance chamber that supplies first filtration module to hold wherein between the surface of core shell and the internal surface of casing, the inside of first appearance chamber is equipped with first inlet channel, first filtration module's inlet end is through first inlet channel and first water inlet fluid communication, be equipped with on the core shell with the intercommunication mouth of first filtration module's play water end intercommunication, and this intercommunication mouth is through play water channel and delivery port fluid communication.

As a first way of waterway design, the first filter module and the second filter module can be connected in series, and the communication port is in fluid communication with the water inlet end of the second filter module.

As a second mode of waterway design, the first filter module and the second filter module can be connected in parallel, a communication channel is arranged in the second filter module, the inlet of the communication channel is communicated with the communication port, and the outlet of the communication channel is in fluid communication with the inlet of the water outlet channel.

In order to facilitate the opening of the shell, the shell is in a strip shape, and the first water inlet, the second water inlet and the water outlet are all arranged on the same end wall of the shell.

In order to avoid local too weak of the end wall of one end of the shell and in order to reduce the size of the end wall of the shell and further reduce the volume of the composite filter element, the first water inlet, the second water inlet and the water outlet are not on the same straight line.

In order to facilitate the composite filter element to stop water by itself, the water stop valves are arranged in the first water inlet, the second water inlet and the water outlet, so that the composite filter element is prevented from dripping after being disassembled.

The technical scheme adopted by the utility model for solving the first technical problem is as follows: a composite filter element comprises a shell, wherein the shell is provided with a water inlet and a first water outlet;

the first filtering module is accommodated in the shell and is positioned on the water flow path of the water inlet and the first water outlet;

the second filter module is accommodated in the shell, and the filter precision of the second filter module is smaller than that of the first filter module;

the method is characterized in that: the shell is also provided with a second water outlet, and the second filtering module is positioned on a water flow path between the water inlet and the second water outlet.

In order to facilitate the formation of the flow channels of the first filter module and the second filter module, a water inlet channel is arranged in the shell, the inlet of the water inlet channel is communicated with the water inlet, and the outlet of the water inlet channel is in fluid communication with the water inlet end of the first filter module and the water inlet end of the second filter module; a first water outlet channel is arranged in the first filtering module, and the outlet of the first water outlet channel is in fluid communication with a first water outlet; the second filter module is internally provided with a second water outlet channel positioned at the periphery of the first water outlet channel, and the outlet of the second water outlet channel is in fluid communication with the second water outlet.

Further designed, the first filtering module comprises a first central pipe and a first filtering material arranged at the periphery of the first central pipe, wherein a first through hole which enables the water outlet side of the first filtering material to be in fluid communication with a first water outlet is arranged on the pipe wall of the first central pipe;

the second filtering module comprises a second central pipe and a second filtering material arranged at the periphery of the second central pipe, and a second through hole which enables the water outlet side of the second filtering material to be in fluid communication with a second water outlet is arranged on the pipe wall of the second central pipe;

the first central tube is provided with a first section corresponding to the first filter material and a second section corresponding to the second filter material, the first through hole is positioned on the first section, and the second central tube is sleeved on the periphery of the second section, so that the first central tube can be used as a mounting foundation of the second filter element module, and water can be prevented from being mixed between the first water outlet channel and the second water outlet channel.

In order to facilitate the opening of the shell, the shell is in a strip shape, and the water inlet, the first water outlet and the second water outlet are all arranged on the same end wall of the shell.

In order to avoid local too weak of the end wall of one end of the shell and in order to reduce the size of the end wall of the shell and further reduce the volume of the composite filter element, the water inlet, the first water outlet and the second water outlet are not on the same straight line.

In order to facilitate the composite filter element to stop water by itself, water stop valves are arranged in the water inlet, the first water outlet and the second water outlet, so that the composite filter element is prevented from dripping after being disassembled.

Further designed, the first filtering module is a reverse osmosis filtering module or a nanofiltration module.

Because the reverse osmosis filtration module can generate waste water in the operation process, the shell is also provided with a waste water port which is in fluid communication with the waste water end of the reverse osmosis filtration module.

Further designed, the second filter module is at least one of a nanofiltration module, a reverse osmosis filter module, an ultrafiltration module, an activated carbon filter module or a membrane chromatography filter module.

In order to simplify assembly of the composite filter element, the first filter module and the second filter module are spaced apart in the longitudinal direction of the housing.

The utility model solves the second technical problem as follows: the utility model provides a water purification unit's waterway system, includes governing valve, its characterized in that: the composite filter element is applied, and the regulating valve is communicated with the second water inlet.

The utility model solves the second technical problem as follows: the utility model provides a water purification unit's waterway system, includes governing valve, its characterized in that: the composite filter element is applied, and the regulating valve is communicated with the first water outlet and the second water outlet.

The utility model solves the third technical problem as follows: a water purification apparatus, characterized in that: the waterway system of the water purifying device is applied.

Compared with the prior art, the utility model has the advantages that: the composite filter element is provided with the first water inlet, the second water inlet and the water outlet, the first filter module is arranged on the water flow path of the first water inlet and the water outlet, the second filter module is arranged on the water flow path between the second water inlet and the water outlet, and the filter precision of the second filter module is smaller than that of the first filter module, so that two water flow paths with different filter precision are arranged inside the composite filter element, the composite filter element can filter out at least two purified water with different mineral contents, and the requirements of users on different mineral contents in the purified water can be met; the composite filter element is provided with the water inlet, the first water outlet and the second water outlet, the first filter module is arranged on the water flow path of the water inlet and the first water outlet, the second filter module is arranged on the water flow path between the water inlet and the second water outlet, and the filter precision of the second filter module is smaller than that of the first filter module, so that the composite filter element is internally provided with two water flow paths with different filter precision, and further the composite filter element can filter out at least two purified water with different mineral contents, and the requirements of users on different mineral contents in the purified water can be met.

Drawings

FIG. 1 is a perspective view of a composite filter element according to embodiment 1 of the present utility model;

FIG. 2 is a cross-sectional view of the composite cartridge of example 1 of the present utility model;

FIG. 3 is a schematic diagram of a waterway system of the water purifying apparatus in embodiment 1 of the present utility model;

FIG. 4 is a cross-sectional view of a composite cartridge of example 2 of the present utility model;

FIG. 5 is a schematic diagram of a waterway system of the water purifying apparatus in embodiment 2 of the present utility model;

FIG. 6 is a perspective view of the composite filter element of embodiment 3 of the utility model;

FIG. 7 is a cross-sectional view of a composite cartridge of example 3 of the present utility model;

fig. 8 is a schematic diagram of a waterway system of a water purifying apparatus in embodiment 3 of the present utility model.

Detailed Description

Embodiments of the present utility model are described in further detail below.

Example 1

As shown in fig. 1-3, is a first preferred embodiment of the present utility model.

As shown in fig. 2, the composite filter element in the present embodiment includes main components such as a first filter module 1, a second filter module 2, and a housing 3.

As shown in fig. 1 and 2, the housing 3 has a long strip shape, and an upper end wall 3a of the housing 3 is provided with a first water inlet 311, a second water inlet 312, a water outlet 323, and a waste water port 33. The first water inlet 311, the second water inlet 312, the water outlet 323, and the waste gate 33 are not collinear. The inside of the first water inlet 311 (not shown), the inside of the second water inlet 312, the inside of the water outlet 323, and the inside of the waste water outlet 33 are provided with water stop valves 8. Each water stop valve 8 comprises a spring and a valve core, each valve core can move relative to the shell and can open or close the corresponding water gap, and each spring enables the corresponding valve core to always have a movement trend of closing the corresponding water gap.

As shown in fig. 2, the first filter module 1 is a reverse osmosis filter module, and the first filter module 1 includes a first central tube 11 and a first filter medium 12 disposed at the periphery of the first central tube 11. The water inlet end and the wastewater end of the first filter module 1 are both arranged at the end part of the first filter material 12, and the water outlet end of the first filter module 1 is arranged at the upper end port of the first central tube 11. The second filter module 2 is a membrane chromatography filter module, so that the filter accuracy of the second filter module 2 is smaller than that of the first filter module 1. The second filter module 2 includes an upper bracket 23, a lower bracket 24, and a second filter medium 22 provided between the upper bracket 23 and the lower bracket 24. The water inlet end of the second filter module 2 is disposed on the peripheral side of the second filter medium 22, the upper bracket 23 is provided with a central hole 231, and the water outlet end of the second filter module 2 is the central hole 231 of the upper bracket 23.

As shown in fig. 2, the inside of the housing 3 is provided with a core case 4 adjacent to the upper end 3a, the inside of the core case 4 forms a second accommodating chamber 40 in which the second filter module 2 is accommodated, and the inside of the second accommodating chamber 40 is provided with a water outlet passage 101c and a second water inlet passage 100b located at the periphery of the water outlet passage 101c, and both the water outlet passage 101c and the second water inlet passage 100b are formed by the core case 4. A first water passing gap is formed between the outer surface of the second filter module 2 and the inner surface of the core shell 4, and the second water inlet 312 is communicated with the water inlet end of the second filter module 2 through the second water inlet channel 100b and the first water passing gap in sequence. The central hole 231 of the second filter module 2 communicates with the inlet of the water outlet channel 101c, and the outlet of the water outlet channel 101c communicates with the water outlet 323.

As shown in fig. 2, a first receiving chamber 30 in which the first filter module 1 is received is formed between the outer surface of the core case 4 and the inner surface of the housing 3, and the first receiving chamber 30 is spaced apart from the second receiving chamber 40 in the length direction of the housing 3. The first water inlet channel 100a is disposed in the first cavity 30, an inlet of the first water inlet channel 100a is communicated with the first water inlet 311 (not shown), and an outlet of the first water inlet channel 100a is communicated with the water inlet end of the first filter medium 12. The core housing 4 is provided with a communication port 41 which is communicated with the upper end port of the first central tube 11, and the communication port 41 is in fluid communication with the water inlet end of the second filter material 22, so that the first filter module 1 and the second filter module 2 are connected in series, and the water outlet end of the first filter module 1 is communicated with the water outlet 323 through the communication port 41, the second filter module 2 and the water outlet channel 101c in sequence. The second chamber 30 is further provided with a waste water channel 102, the waste water end of the first filter medium 12 is communicated with the inlet of the waste water channel 102, and the outlet of the waste water channel 102 is communicated with the waste water port 33.

As shown in fig. 3, the waterway system of the water purifying apparatus in this embodiment sequentially includes a pre-filter element 201, a TDS probe 7, a composite filter element 200, and a post-filter element 202 along a water flow path, and a regulating valve 5 is disposed between the TDS probe 7 and a second water inlet 312 of the composite filter element 200, for opening a valve port, so as to regulate and control a TDS value of the produced purified water. The waste water port 33 of the composite filter element is also communicated with a waste water electromagnetic valve 6.

The water purifying device in this embodiment is applied with the waterway system of the water purifying device.

In the water purifying apparatus in this embodiment, since the composite filter element 200 has two water flow paths with different filtering precision, and the adjusting valve 5 controls the water inflow of the second water inlet 312, the purified water filtered by the two water flow paths with different filtering precision can be mixed to obtain at least two purified water with different mineral contents, so as to satisfy the demands of users on different mineral contents in the purified water.

Example 2

As shown in fig. 4 to 5, is a second preferred embodiment of the present utility model.

This embodiment differs from embodiment 1 in that: the second filter module 2 is an ultrafiltration module, and the second filter module 2 includes only an upper bracket 23 and a second filter material 23. The water inlet side of the second filter module 2 is disposed on the peripheral side of the second filter medium 22, and the water outlet end of the second filter module 2 is disposed on the upper side of the upper bracket 23.

A connecting piece 91 is arranged in the second containing cavity 40, and a partial second water inlet channel 100b is formed between the connecting piece 91 and the inner surface of the core shell 4; the connection 91 forms a second water gap with the upper side of the upper bracket 23. The water outlet channel 101c is disposed in the connector 91, and the inlet of the water outlet channel 101c is connected to the second water gap, and the outlet of the water outlet channel 101c is connected to the water outlet 323.

The second filter module 2 is provided with a connection pipe 92 inside, and the connection pipe 92 is arranged inside the upper bracket 23 in a penetrating manner. The inside of the connection pipe 92 is provided with a communication passage 921, an inlet of the communication passage 921 communicates with the communication port 41, and an outlet of the communication passage 921 fluidly communicates with an inlet of the water outlet passage 101c, thereby connecting the first filter module 1 and the second filter module 2 in parallel.

As shown in fig. 5, in the waterway system of the water purifying apparatus of this embodiment, the TDS probe 7 is located between the composite filter element 200 and the post-filter element 202.

Example 2

As shown in fig. 6 to 8, a third preferred embodiment of the present utility model.

As shown in fig. 6, the housing 3 is elongated, and an upper end 3a of the housing 3 is provided with a water inlet 313, a first water outlet 321, a second water outlet 322, and a waste water outlet 33. The water inlet 313, the first water outlet 321, the second water outlet 322, and the waste water outlet 33 are not collinear. The water inlet 313 is provided with a water stop valve 8 in the interior (not shown), in the interior of the first water outlet 321, in the interior of the second water outlet 322 and in the interior of the waste water outlet 33. Each water stop valve 8 comprises a spring and a valve core, each valve core can move relative to the shell and can open or close the corresponding water gap, and each spring enables the corresponding valve core to always have a movement trend of closing the corresponding water gap. The first filter module 1 and the second filter module 2 are arranged at intervals along the longitudinal direction of the housing 3.

As shown in fig. 7, the first filter module 1 is a reverse osmosis filter module, and the first filter module 1 includes a first central tube 11 and a first filter medium 12 disposed at the periphery of the first central tube 11. The water inlet end and the waste water end of the first filter module 1 are arranged at the end part of the first filter material 12; the first central tube 11 has a first section 111 corresponding to the first filter medium 12 and a second section 112 corresponding to the second filter module 2, a first through hole 1111 is formed in a wall of the first section 111, the first through hole 1111 communicates with a water outlet side of the first filter medium 12 and an inlet of the first water outlet channel 101a, and an outlet of the first water outlet channel 101a forms a water outlet end of the first filter module 1 and is disposed at an upper end of the first central tube 11.

The second filter module 2 is a nanofiltration module, so that the filtration accuracy of the second filter module 2 is smaller than that of the first filter module 1. The second filter module 2 includes a second central tube 21 sleeved on the periphery of the second section 112, and a second filter medium 22 provided on the periphery of the second central tube 21. The water inlet end of the second filter module 2 is provided at the end of the second filter medium 22. A second water outlet passage 101b located at the periphery of the first water outlet passage 101a is formed between the inner peripheral surface of the second center tube 21 and the outer peripheral surface of the second section 112 of the first center tube 21. The wall of the second central tube 21 is provided with a second through hole 222, and the second through hole 222 communicates the water outlet side of the second filter medium 22 with the inlet of the second water outlet channel 101b.

As shown in fig. 7, a water inlet channel 100c is provided in the housing 3, an inlet of the water inlet channel 100c is communicated with the water inlet 313, and an outlet of the water inlet channel 100c is communicated with both the water inlet end of the first filter medium 12 and the water inlet end of the second filter medium 22; the outlet of the first water outlet channel 101a is communicated with a first water outlet 321; the outlet of the second water outlet channel 101b communicates with the second water outlet 322.

The waterway system of the water purifying device in this embodiment sequentially includes a pre-filter element 201, a TDS probe 7, a composite filter element 200, a regulating valve 5, a TDS probe 7 and a post-filter element 202 along a water flow path, and a first water outlet 321 and a second water outlet 322 of the composite filter element 200 are both communicated with the regulating valve 5, so that purified water with two different TDS values is mixed, thereby regulating and controlling the TDS value of produced purified water. The waste water port 33 of the composite filter element is also communicated with a waste water electromagnetic valve 6.

The water purifying device in this embodiment is applied with the waterway system of the water purifying device.

Claims (21)

1. A composite filter cartridge comprising

A housing (3) provided with a first water inlet (311) and a water outlet (323);

a first filter module (1) accommodated in the interior of the housing (3) and located on a water flow path between the first water inlet (311) and the water outlet (323);

the second filter module (2) is accommodated in the shell (3), and the filter precision of the second filter module (2) is smaller than that of the first filter module (1);

the method is characterized in that: the shell (3) is also provided with a second water inlet (312), and the second filter module (2) is positioned on a water flow path between the second water inlet (312) and the water outlet (323).

2. A composite filter element according to claim 1, wherein: the inside of casing (3) is equipped with core shell (4), the inside of core shell (4) forms second appearance chamber (40) that supplies second filtration module (2) holding wherein, just the inside of second appearance chamber (40) is equipped with outlet channel (101 c) and is located outlet channel (101 c) outlying second inlet channel (100 b), the inlet end of second filtration module (2) is through second inlet channel (100 b) and second water inlet (312) fluid communication, the outlet end of second filtration module (2) is through outlet channel (101 c) and delivery port (323) fluid communication.

3. A composite filter element according to claim 2, wherein: a first containing cavity (30) for containing the first filter module (1) therein is formed between the outer surface of the core shell (4) and the inner surface of the shell (3), a first water inlet channel (100 a) is arranged in the first containing cavity (30), the water inlet end of the first filter module (1) is in fluid communication with the first water inlet (311) through the first water inlet channel (100 a), a communication port (41) communicated with the water outlet end of the first filter module (1) is formed in the core shell (4), and the communication port (41) is in fluid communication with the water outlet (323) through the water outlet channel (101 c).

4. A composite filter element according to claim 3, wherein: the communication port (41) is in fluid communication with the water inlet end of the second filter module (2).

5. A composite filter element according to claim 3, wherein: the second filter module (2) is internally provided with a communication channel (921), an inlet of the communication channel (921) is communicated with the communication port (41), and an outlet of the communication channel (921) is in fluid communication with an inlet of the water outlet channel (101 c).

6. A composite filter element according to claim 1, wherein: the shell (3) is in a strip shape, and the first water inlet (311), the second water inlet (312) and the water outlet (323) are all arranged on the same end wall of the shell (3).

7. A composite filter element according to claim 6, wherein: the first water inlet (311), the second water inlet (312) and the water outlet (323) are not on the same straight line.

8. A composite filter element according to claim 1, wherein: the water stop valves (8) are arranged in the first water inlet (311), the second water inlet (312) and the water outlet (323).

9. A composite filter cartridge comprising

A housing (3) provided with a water inlet (313) and a first water outlet (321);

a first filter module (1) accommodated in the interior of the housing (3) and located on a water flow path between the water inlet (313) and the first water outlet (321);

the second filter module (2) is accommodated in the shell (3), and the filter precision of the second filter module (2) is smaller than that of the first filter module (1);

the method is characterized in that: the shell (3) is also provided with a second water outlet (322), and the second filter module (2) is positioned on a water flow path between the water inlet (313) and the second water outlet (322).

10. A composite filter element according to claim 9, wherein: a water inlet channel (100 c) is arranged in the shell (3), an inlet of the water inlet channel (100 c) is communicated with the water inlet (313), and an outlet of the water inlet channel (100 c) is in fluid communication with a water inlet end of the first filter module (1) and a water inlet end of the second filter module (2); a first water outlet channel (101 a) is arranged in the first filtering module (1), and the outlet of the first water outlet channel (101 a) is in fluid communication with a first water outlet (321); the second filter module (2) is internally provided with a second water outlet channel (101 b) positioned at the periphery of the first water outlet channel (101 a), and the outlet of the second water outlet channel (101 b) is in fluid communication with a second water outlet (322).

11. A composite filter element according to claim 10, wherein: the first filtering module (1) comprises a first central tube (11) and a first filtering material (12) arranged on the periphery of the first central tube (11), wherein a first through hole (1111) which enables the water outlet side of the first filtering material (12) to be in fluid communication with a first water outlet (321) is arranged on the tube wall of the first central tube (11);

the second filtering module (2) comprises a second central tube (21) and a second filtering material (22) arranged on the periphery of the second central tube (21), and a second through hole (222) which enables the water outlet side of the second filtering material (22) to be in fluid communication with a second water outlet (322) is arranged on the tube wall of the second central tube (21);

the first central tube (11) is provided with a first section (111) corresponding to the first filter material (12) and a second section (112) corresponding to the second filter material (22), the first through hole (1111) is positioned on the first section (111), and the second central tube (21) is sleeved on the periphery of the second section (112).

12. A composite filter element according to claim 9, wherein: the shell (3) is in a strip shape, and the water inlet (313), the first water outlet (321) and the second water outlet (322) are all arranged on the same end wall of the shell (3).

13. A composite filter element according to claim 12, wherein: the water inlet (313), the first water outlet (321) and the second water outlet (322) are not on the same straight line.

14. A composite filter element according to claim 7, wherein: the water stop valves are arranged in the water inlet (313), the first water outlet (321) and the second water outlet (322).

15. A composite filter element according to any one of claims 1 to 14, wherein: the first filtering module (1) is a reverse osmosis filtering module or a nanofiltration module.

16. A composite filter element according to claim 15, wherein: the shell (3) is also provided with a waste water port (33) which is communicated with the waste water end phase of the reverse osmosis filtration module.

17. A composite filter element according to any one of claims 1 to 14, wherein: the second filter module (2) is at least one of a nanofiltration module, a reverse osmosis filter module, an ultrafiltration module, an activated carbon filter module or a membrane chromatography filter module.

18. A composite filter element according to claim 6 or 7 or 12 or 13, wherein: the first filter module (1) and the second filter module (2) are spaced in the length direction of the shell (3).

19. Waterway system of water purification equipment, including governing valve (5), its characterized in that: use of a composite filter cartridge (200) according to any one of claims 1 to 8, wherein the regulating valve (5) is in communication with the second water inlet (312).

20. Waterway system of water purification equipment, including governing valve (5), its characterized in that: the composite filter element (200) as claimed in any one of claims 9 to 18 is applied, and the regulating valve (5) is communicated with both the first water outlet (321) and the second water outlet (322).

21. A water purification apparatus, characterized in that: a waterway system using the water purifying apparatus of claim 19 or 20.