CN210001670U

CN210001670U - composite filter element assembly

Info

Publication number: CN210001670U
Application number: CN201920160687.3U
Authority: CN
Inventors: 朱泽春; 任汪洋; 宋斌; 刘宗印; 马明阳
Original assignee: Joyoung Co Ltd
Current assignee: Hangzhou Jiuchuang Home Appliances Co ltd
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2020-01-31
Anticipated expiration: 2029-01-30

Abstract

The utility model discloses an combined type filter element group spare this combined type filter element group spare includes the shell and sets up filter core and the second filter core in the shell, is provided with 0 on the shell and crosses the mouth of a river, second and cross mouth of a river and third and cross the mouth of a river, the filter core is reverse osmosis filter core, reverse osmosis membrane's orientation the th terminal surface of second filter core forms water passing end, and the inboard end and the outside end of reverse osmosis membrane form second water passing end and third water passing end in proper order, and the water crossing mouth passes through second filter core and water passing end and the intercommunication in the second water passing end, and the second is crossed mouth of a river and is crossed another intercommunications in water passing end and the second water passing end with the water passing end with the second, and the third is crossed mouth of a river and is crossed water passing end intercommunication.

Description

composite filter element assembly

Technical Field

The utility model relates to a water treatment technical field, concretely relates to kinds of combined type filter element group spare.

Background

The existing reverse osmosis water purifier is generally four-stage filtration, filter element assemblies are arranged in each -stage filtration, and the four-stage filtration generally comprises -stage PP cotton filter element assemblies, second-stage granular activated carbon filter element assemblies, third-stage reverse osmosis filter element assemblies and fourth-stage activated carbon filter element assemblies, wherein the four-stage filter element assemblies work independently and are connected with one another by parts such as water pipes, quick connectors and the like.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides an aim at, provide combined type filter element subassemblies to reduce the quantity of filter element subassembly in the reverse osmosis water purification machine, simplify water purifier inner tube way connection.

In order to solve the technical problem, the utility model provides an combined type filter core, include the shell and set up second filter core and second filter core in the shell, be provided with 0 on the shell and cross mouth of a river, second cross mouth of a river and third cross mouth of a river, 1 filter core is the reverse osmosis filter core, the reverse osmosis filter core includes central body and twines reverse osmosis membrane on the body of center, reverse osmosis membrane's orientation the 2 terminal surface of second filter core forms the 3 end of crossing water, reverse osmosis membrane's inboard end forms the second end of crossing water, reverse osmosis membrane's the terminal third end of crossing water that forms in the outside, be provided with and second water route in the central body, water route with the end of crossing water intercommunication, the second water route with the second end of crossing water intercommunication, the end of crossing water pass through the second filter core with the end of crossing water and water routes in the second, the second cross mouth of a river with the second end of crossing water with the in the second water, the third end of crossing water communicates with the third end of crossing water.

The utility model discloses combined type filter element group spare, filter core and second filter core have been integrateed in the shell, the second filter core is the reverse osmosis filter core, therefore, filter core can be the leading filter core or the rearmounted filter core of reverse osmosis filter core, thereby, the raw water can accomplish the two-stage filtration when passing through this combined type filter element group spare, just so can reduce the quantity of the filter element group spare of installation in the reverse osmosis water purification machine, simplify the tube coupling between the filter element group spare, improve the reliability of purifier, reduce the whole volume of purifier.

Optionally, the second filter element is disposed at the end of the th filter element, the second filter element comprises a cylinder and a filter element body disposed in the cylinder, the direction of the cylinder is provided with a th flow port on the th end wall of the housing, the th flow port is communicated with the th water passage port, the direction of the cylinder is provided with a second flow port on the second end wall of the th filter element, and the second flow port is connected with the central tube body, so that the second flow port is communicated with the th water passage end and the second water passages.

In addition, the second filter element is arranged at the end of the filter element, so that the axial size of the filter element assembly can be increased without increasing the radial size of the filter element assembly, and the length of the water purifier cannot be influenced.

Optionally, the barrel includes an annular side wall, an end of the annular side wall facing the reverse osmosis membrane is hermetically connected with an end face of the reverse osmosis membrane, a th water passing gap is formed between the second end wall and the reverse osmosis membrane, a hollow structure is arranged on a part of the annular side wall located between the second end wall and the reverse osmosis membrane, the second water passing port is communicated with the th water passing end through the hollow structure and the th water passing gap, and the second circulation port is communicated with the second water path.

Through setting up water clearance and hollow out construction, simplified the water route between second mouth of a river and the end of crossing water.

Optionally, the central tube includes an outer tube and an inner tube sleeved in the outer tube, an end of the inner tube facing away from the second filter element is connected to an inner side surface of the outer tube in a sealing manner, the outer tube and the inner tube form the second water path therebetween, a tube wall of the outer tube is provided with a water through hole, the second water path is communicated with the second water passing end through the water through hole, the inner tube forms the water path therein, the second water port is connected to the central tube through a water separator, and the water separator is provided with a channel for communicating the water passing gap with the water path and a second channel for communicating the second water port with the second water path.

The water separator well realizes the connection between the filter element and the second filter element, and simplifies the water path.

Optionally, be provided with the water-stop sheet along axial extension in the body of center pipe, the water-stop sheet will the inside of body of center is cut apart into water routes with the second water route, keeping away from in second water route the end of second filter core is sealed, be provided with the on the lateral wall in second water route and cross the water hole, the second water route passes through the water hole with the second is crossed water end intercommunication, the second flow port with the body of center is connected and is made the second flow port with the second water route intercommunication, the orientation in water route the end of second filter core is sealed, be provided with the third on the lateral wall in water route and cross the water hole, the water clearance with the water route passes through the third is crossed the water hole intercommunication.

Alternatively,

a water stop plate extending along the axial direction is arranged in the central pipe body, the water stop plate divides the interior of the central pipe body into an th water channel and a second water channel, the end of the second water channel far away from the mounting head is closed, the side wall of the second water channel is provided with a th water through hole, the second water channel is communicated with the second water through hole th water through hole, the end of the th water channel facing the second filter element is closed, the side wall of the th water channel is provided with a third water through hole,

the cylinder body comprises an annular side wall, the second end wall is connected with the lower end of the annular side wall, a water passing gap is arranged between the second end wall and the water passing end,

an end of the central tube body facing the second filter element has a stepped side surface, the second flow port has a second stepped side surface matching the stepped side surface, the second flow port is connected with the central tube body so that the second stepped side surface abuts against the stepped side surface, the second flow port is communicated with the second water channel, and the second water passing port is communicated with the water channel through the water passing gap and the third water passing hole.

The second step-shaped side surface is abutted with the th step-shaped side surface, so that the filter element plays a role in supporting the second filter element at , and the internal structure of the filter element assembly is stabilized.

Alternatively,

the filter element body is active carbon particles filled in the cylinder body, the th flow port is communicated with the second flow port through the lower end surface of the filter element body, or,

the filter core body is for filling in the active carbon granule in the barrel, flow opening passes through the up end of filter core body with second flow opening intercommunication.

Alternatively,

a flow buffering plate is arranged between the lower end surface of the filter element body and the second end wall of the cylinder body, a second water through hole is formed in the flow buffering plate, and the lower end surface of the filter element body is communicated with the second flow through hole through the second water through hole; alternatively, the first and second electrodes may be,

a buffer plate is arranged between the upper end surface of the filter element body and the th end wall of the cylinder body, a second water passing hole is formed in the buffer plate, and the upper end surface of the filter element body is communicated with the th flow opening through the second water passing hole.

The setting of current buffering board can increase the damping that the water flows to make the water that flows into the filter core body keep longer time in the part of filter core body near current buffering board, make water can distribute in the part of filter core body near current buffering board uniformly, make the active carbon granule in this part can make full use of.

Alternatively,

the filter element body is a carbon rod filter element with an annular structure, water flowing in from the second flow port enters the filter element body through the outer side surface of the filter element body, flows out from the inner side surface of the filter element body and flows to the flow port, or,

the filter core body is the carbon-point filter core that has the annular structure, certainly water that the circulation mouth flowed in passes through the outside surface entering of filter core body this is internal, and certainly the inside surface outflow of filter core body, and flow to the second circulation mouth.

Optionally, still include be located the shell and detain and establish reverse osmosis filter core deviates from the end cover on the second end face of second filter core, the end cover with the outer loop portion sealing connection of second end face, the second end face pass through the waterway with terminal surface intercommunication.

With the structure, the two end faces of the reverse osmosis membrane can act on the th water passing end simultaneously, so that the water passing amount of the reverse osmosis membrane is increased, and the filtering efficiency is improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

The accompanying drawings are provided to provide an -step understanding of the technical solutions of the present invention, and constitute part of the specification, serve to explain the technical solutions of the present invention with example of the present application, and do not constitute a limitation on the technical solutions of the present invention.

FIG. 1 is a schematic view of a composite filter element assembly according to embodiment of the present invention;

FIG. 2a is a schematic view of cross-sectional configurations of the water separator of FIG. 1;

FIG. 2b is a schematic view of another cross-sectional configurations of the water separator of FIG. 1;

FIG. 3 is a schematic cross-sectional structural view of the annular side wall and the second end wall of the cartridge of FIG. 1;

FIG. 4 is a schematic view of a composite filter element assembly according to a second embodiment of the present invention;

FIG. 5 is a schematic view of a composite filter element assembly according to a third embodiment of the present invention;

FIG. 6 is a schematic view of a fourth embodiment of a composite filter element assembly according to the present invention;

FIG. 7 is a schematic view of a composite filter element assembly according to a fifth embodiment of the present invention;

fig. 8 is a schematic view of a composite filter element assembly according to a sixth embodiment of the present invention.

Description of reference numerals:

10-a housing;	11- water outlet;	12-a second water gap;
			13-third water gap;	20-an th cartridge;	201-a second water passing gap;
21-a central tube body;	211- th waterway;	212 — a second water circuit;
			213-outer body;	214 — an inner tube;	215-water passing hole ;
216-a water-stop sheet;	217-third water passing hole;	22-a reverse osmosis membrane;
			221- th water passing end;	222-a second water passing end;	223-a third water passing end;
224 — a second end face;	23-end cap;	30-a second filter element;
			31-a barrel;	311- th end wall;	312-second endA wall;
313 — a flow port ;	314 — second flow port;	315 — annular sidewall;
			316- th stiffener;	317-a second reinforcing rib;	318-third reinforcing rib;
32-a cartridge body;	321-a buffer plate;	322-second water passing hole;
			323-bottom cover;	33- th water passing gap;	34-hollow structure;
40-a water separator;	41-channel ;	411 — th blind hole;
			412-radial hole;	42 — a second channel;	421 — second blind hole;
422-through hole;	100-a filter element seat;	101-a mounting head;
			200-waterway conversion device;	3151-step-like extensionAnd (5) ribs.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.

The present invention will be described in detail below with reference to specific embodiments.

example:

fig. 1 is a schematic view of a composite filter element assembly according to an embodiment of the present invention, which includes a housing 10, and a th filter element 20 and a second filter element 30 disposed in the housing 10. the housing 10 is provided with a th water passing port 11, a second water passing port 12, and a third water passing port 13. in this embodiment, an upper end of the housing 10 forms a mounting head 101 assembled with a filter cartridge holder 100, and the th water passing port 11, the second water passing port 12, and the third water passing port 13 are all disposed on the mounting head 101, i.e., an upper end of the housing 10. in other embodiments, the th water passing port 11, the second water passing port 12, and the third water passing port 13 may be further disposed at both ends of the housing 10, respectively, as required.

In this embodiment, the th filter element 20 is a reverse osmosis filter element, the reverse osmosis filter element comprises a central tube 21 and a reverse osmosis membrane 22 wound on the central tube 21, the end surface of the reverse osmosis membrane 22 facing the second filter element 30 forms a 0 th water passing end 221, the inner end of the reverse osmosis membrane forms a second water passing end 222, the outer end of the reverse osmosis membrane forms a third water passing end 223, a th water channel 211 and a second water channel 212 which are isolated from each other are arranged in the central tube 21, the th water channel 211 is communicated with the th water passing end 221, the second water channel 212 is communicated with the second water passing end 222, the water passing port 11 is communicated with the th water passing end 221 and of the second water channels 212 through the second filter element 30, the second water passing port 12 is communicated with the th water passing end 221 and the of the second water channel 212, and the third water passing port 13 is communicated with the third water passing end 223.

As shown in FIG. 1, in this embodiment, the outer end of the reverse osmosis membrane forms a third water passing end 223, so that the reverse osmosis membrane of this embodiment is a side-flow reverse osmosis membrane, in order to enable the second end surface 224 of the reverse osmosis membrane facing away from the second filter element 30 to perform the same function as the end surface, i.e., the water passing end 221, the composite filter element assembly further comprises an end cover 23 positioned in the housing 10, the end cover 23 is fastened on the second end surface 224 of the reverse osmosis filter element, the end cover 23 is hermetically connected with the outer ring part of the second end surface 224, and the second end surface 224 is communicated with the water passing end 221 through the water channel 211, so that when the water passing port or the second water passing port is communicated with the water passing end 221, the water passing port or the second water passing port is also communicated with the second end surface 224.

As can be seen from FIG. 1, the composite filter core assembly further comprises a waterway conversion device 200, the waterway conversion device 200 is arranged on the end of the filter element 20 facing the mounting head 101, a th flow passage, a second flow passage and a third flow passage are arranged on the waterway conversion device 200, the water passing port 11 is communicated with the th water passing end 221 and of the second water passages 212 through the th flow passage and the second filter element, the second water passing port 12 is communicated with the water passing end 221 and the other of the second water passages 212 through the second flow passage, the third water passing port 13 is communicated with the third water passing end 223 through the third flow passage, and the second filter element 30 is arranged between the waterway conversion device 200 and the filter element 20.

In this embodiment, as shown in fig. 1, the second cartridge 30 is disposed at the end (upper end in fig. 1) of the -th cartridge 20, the second cartridge 30 includes a barrel 31 and a cartridge body 32, the cartridge body 32 is disposed within the barrel 31, the barrel 31 has a -th end wall 311 facing the housing 10 and a second end wall 312 facing the -th cartridge 20, a -th communication port 313 is disposed on the -th end wall 311, a second communication port 314 is disposed on the second end wall 212, and the second communication port 314 is connected to the central tube 21 such that the second communication port 314 communicates with the -th water passing end 221 and of the second water channels 212.

In addition, the second filter element 30 is arranged at the end of the filter element 20, the axial size of the filter element assembly can be increased, the radial size of the filter element assembly cannot be increased, and therefore the length of the water purifier cannot be influenced.

In this embodiment, as shown in fig. 1, the cylinder 31 includes an annular side wall 315, an end of the annular side wall 315 facing the reverse osmosis membrane 22 is in sealed connection with an outer ring of an end surface of the reverse osmosis membrane 22, in this embodiment, an end of the annular side wall 315 facing the second filter element 20 is provided with a step-shaped extension rib 3151, the step-shaped extension rib 3151 is sleeved on the end surface where the water passing end 221 is located along a circumferential direction of the filter element 20 and is in sealed connection with an outer ring portion of the end surface where the water passing end 221 is located, a side wall of the water path switching device 200 is overlapped on an outer side of the step-shaped extension rib 3151 and is in sealed connection with the step-shaped extension rib 3151, a second water passing gap 201 is provided between the annular side wall 315 and an inner side wall of the water path switching device 200, a second water passing gap 33 is provided between the second end wall 312 and the reverse osmosis membrane 22, a hollowed-out structure 34 is provided on a portion of the annular side wall 315 located between the second end wall 312 and the reverse osmosis membrane 22, a water passing end 221 of the is communicated with the second water passing port.

It will be readily appreciated that in a reverse osmosis cartridge, the inner end of the reverse osmosis membrane is typically reverse osmosis membrane filtered water, i.e. the water exiting the second water passing end 222 is reverse osmosis membrane filtered water, then the second water path 212 is a pure water path, in this embodiment, the second fluid port 314 is in communication with the second water path 212, such that pure water in the second water path 212 enters the second cartridge 30 through the second fluid port 314 and exits the water passing port 11 through the fluid port 313, thereby completing step filtration, and therefore, in this embodiment, the second cartridge 30 is a post-stage cartridge of the cartridge 20, i.e. a reverse osmosis cartridge, the water passing port 11 is a pure water port filtered by the cartridge 20 and the second cartridge 30, the second water passing port 12 is a raw water port, and the third water passing port 13 is a concentrate port.

As shown in FIG. 1, the central tube 21 includes an outer tube 213 and an inner tube 214 disposed inside the outer tube 213. the end of the inner tube 214 facing away from the second filter element 30 is connected to the inner surface of the outer tube 213 in a sealing manner, a second water path 212 is formed between the outer tube 213 and the inner tube 214, a water path 211 is formed inside the inner tube 214. the tube wall of the outer tube 213 is provided with a water through hole 215, the second water path 212 is communicated with the second water through end 222 through the water through hole 215, and the second end 224 is communicated with the water through end 221 through the water path 211.

FIG. 2a is a schematic view of cross-sectional structures of the water separator of FIG. 1, FIG. 2b is a schematic view of another cross-sectional structures of the water separator of FIG. 1, in order to communicate the second port 314 with the second waterway 212, in this embodiment, the second port 314 is connected to the central body 21 through the water separator 40. As shown in FIGS. 2a and 2b, a channel 41 and a second channel 42 are provided on the water separator 40. the 1 channel 41 includes a second blind hole centrally disposed from the lower end and a second radial hole 412 communicating with the inner end of the blind hole 411 of 3. the second channel 42 includes a second blind hole 421 centrally disposed from the upper end and a through hole 422 axially penetrating the water separator body from the bottom surface of the second blind hole 421. the through hole 422 is not in communication with both the blind hole 411 of 5 and the radial hole . the second blind hole 421 has a larger diameter than the second blind hole 411 of the waterway 7, the second blind hole 421 is in sealed connection with the second port 314, the second port is in sealed connection with the second blind hole , the outer surface of the second port 3935 is in communication with the water separator surface of the through gap 39213, and the outer pipe 33, the second port 3633 is in communication with the water passage 33, the outer pipe 33, the second port 3633 is in communication with the outer pipe 3, the water passage 33, the outer pipe 211, the second port 3633.

The water separator 40 with the structure not only well realizes the communication between the th water path 211 and the th water passing gap 33 and the communication between the second water path and the second circulation port 314, but also well isolates the th water path and the second water path, thereby avoiding the water mixing phenomenon and ensuring the water quality.

In other embodiments, by properly arranging the structure of the portion of the cylinder 31 between the second end wall 312 and the reverse osmosis membrane 22 and the structure of the water separator, the th waterway 211 can communicate with the second flow port 314 (i.e., the th water passing end 221 communicates with the second flow port 314), and the second waterway 212 can communicate with the second water passing opening 12 through the second water passing gap 201, that is, the th water passing opening 11 can communicate with the th water passing end 221 through the second filter element 30, and the second water passing opening 12 communicates with the second waterway 212, so that the second filter element 30 is the front-stage filter element of the th filter element 20, i.e., the reverse osmosis filter element.

In this embodiment, as shown in fig. 1, the filter element body 32 is activated carbon particles filled in the cylinder 31, in this embodiment, the second filter element 30 is a rear-stage filter element of the -th filter element 20, and therefore, in order to ensure that water discharged from the -th filter element 20 can be more sufficiently filled in the activated carbon particles of the entire second filter element 30, water entering from the second flow port 314 enters the filter element body 32 from the lower end surface of the filter element body 32, that is, toward the end surface of the second flow port 314, so that the filter element body 32 can be filled with water to be filtered from the lower end surface, thereby increasing the filtering area of the second filter element 30 and improving the efficiency.

In order to improve the utilization rate of the activated carbon particles located at the lower portion of the filter element body 32, as shown in fig. 1, a flow slowing plate 321 is disposed between the lower end surface of the filter element body 32 and the second end wall 312, a second water through hole 322 is disposed on the flow slowing plate 321, the lower end surface of the filter element body 32 is communicated with the second through hole 314 through the second water through hole 322, that is, water flowing out of the second through hole 314 passes through the second water through hole 322 and then enters the filter element body 32 through the lower end surface of the filter element body 32.

The arrangement of the flow damper 321 can increase the damping of the water flowing, so that the water flowing into the filter element body 32 from the second flow opening 314 can be kept for a longer time at the lower part of the filter element body 32, the water can be uniformly distributed at the lower part of the filter element body 32, and the activated carbon particles at the lower part can be fully utilized.

In other embodiments, the second filter element 30 may be a preceding stage filter element of the -th filter element 20, the filter element body is activated carbon granules filled in the cylinder, and the -th communication port 313 communicates with the second communication port 314 through the upper end surface of the filter element body, in order to improve the utilization rate of the activated carbon granules on the upper portion of the filter element body, a buffer plate may be disposed between the upper end surface of the filter element body 32 and the -th end wall 311, and a second water through hole may be disposed on the buffer plate, so that the -th communication port communicates with the upper end surface of the filter element body through the second water through hole, that is, water flowing from the -th communication port may enter the filter element body through the upper end surface of the filter element body after passing through.

The utility model discloses combined type filter element group spare, the raw water that gets into from second water passing mouth 12 simultaneously through water passing end 221 and second terminal surface 224 gets into filter core 20 reverse osmosis filter core promptly, water after filter core filters passes through second water route 212 flow direction second circulation mouth 314, and then get into second filter core 30, pure water after second filter core 30 filters flows out from water passing mouth 11, filter core is dense water that reverse osmosis filter core produced promptly and flows out from third water passing mouth 13.

Fig. 3 is a schematic cross-sectional view of the annular side wall and the second end wall of the cylinder body in fig. 1, as shown in fig. 3, a plurality of th ribs 316 extending in the axial direction are provided on the outer side surface of the annular side wall 315, a plurality of th ribs 316 are sequentially provided at intervals, the th ribs 316 can increase the structural strength of the cylinder body and can guide the water flowing through the second water passing gap 201 while ensuring the width of the second water passing gap 201, a plurality of second ribs 317 extending in the radial direction are provided on the inner side of the second end wall 312, the second ribs 317 can increase the structure of the second end wall 312 and can guide the water flowing from the second water passing holes 314 to the baffle plate 321 by while ensuring a required gap between the baffle plate 321 and the second end wall 312.

Second embodiment:

fig. 4 is a schematic view of a composite cartridge assembly according to a second embodiment of the present invention, unlike the embodiment, in this embodiment, the cartridge body 32 is a carbon rod cartridge having a ring-shaped configuration, as shown in fig. 4. in this embodiment, the second cartridge 30 is a rear stage cartridge of the cartridge 20. water flowing in from the second fluid port 314 enters the cartridge body 32 through the outer side surface of the cartridge body 32 and flows out from the inner side surface of the cartridge body 32 to the fluid port 313.

In order to ensure that the water flowing in from the second communication port 314 flows to the outer side surface of the cartridge body 32, as shown in fig. 4, the bottom end of the cartridge body 32 is provided with a bottom cover 323, the bottom cover 323 is hermetically connected with the bottom end of the cartridge body 32, and a gap is formed between the bottom cover 323 and the second end wall 312, and at the same time, the top end of the cartridge body 32 is hermetically connected with the end wall 311, so that the water flowing in from the second communication port 314 can only enter the cartridge body 32 through the outer side surface of the cartridge body and can flow out from the inner side surface of the cartridge body 32 after being filtered by the cartridge body 32.

In other embodiments, the second cartridge 30 can be a pre-positioned cartridge of the -th cartridge 20, the cartridge body 32 can be a carbon rod cartridge having a ring-shaped configuration, the water flowing in through the port 313 enters the cartridge body through the outer surface of the cartridge body, flows out through the inner surface of the cartridge body, and flows toward the second port 314, in order to allow the water flowing in through the port 313 to enter the cartridge body 32 through the outer surface of the cartridge body, a top cap can be provided on the top end of the cartridge body 32, i.e., the end facing the port 313, in sealed connection with the top end of the cartridge body 32, with a gap between the top cap and the end wall 311, and the bottom end of the cartridge body 32, i.e., the end facing the second port 314, in sealed connection with the second end wall 312, such that the water flowing in through the port 313 can only enter the cartridge body from the outer surface of the cartridge body 32, and flow out through the inner surface of the cartridge body 32 after filtration.

The third embodiment:

fig. 5 is a schematic structural diagram of a composite filter element assembly according to a third embodiment of the present invention, different from the embodiment, in this embodiment, a water stop plate 216 is disposed in the central tube 21, the water stop plate 216 divides the interior of the central tube 21 into a water path 211 and a second water path 212, the 0 end of the second water path 212, which is far away from the second filter element 30, is closed, a th water through hole 215 is disposed on the side wall of the second water path 212, the second water path 212 communicates with the second water through end 222 through the th water through hole 215, the second flow port 314 is directly connected with the central tube 21 and communicates with the second water path 212, the end of the water path 211, which faces the second filter element 30, a 387 third water through hole 387217 is disposed on the side wall of the water path 211, and the second water gap 33 and the water path 211 communicate with each other through the third water through hole 217, so that the second water path 224 communicates with the water through end 221 through the .

In this embodiment, the second filter element 30 is a rear stage filter element of the -th filter element 20, raw water flowing in from the second water passing port 12 passes through the water passing gap 33 and simultaneously enters the -th filter element 20 through the water passing end 221 and the second end face 224 to be subjected to -stage filtration, water filtered by the -th filter element 20 passes through the second water channel 212 and the second flow port 314 to be subjected to second-stage filtration in the second filter element 30, pure water generated after filtration by the second filter element 30 flows out from the water passing port 11, and concentrated water generated by the -th filter element 20 flows out from the third water passing port 13.

It will be readily appreciated that the second fluid passage 314 is in communication with the th fluid passage 211 and the second fluid passage 212 is in communication with the second fluid passage 12 through the th and second

fluid gaps

33, 201 by appropriate arrangement of the portion of the barrel 31 between the second end wall 312 and the reverse osmosis membrane 22 and the central tube, so that the second filter cartridge 30 can be used as a pre-filter cartridge for the filter cartridge 20.

The fourth embodiment:

fig. 6 is a schematic view of a combined type cartridge assembly according to a fourth embodiment of the present invention, different from the third embodiment, in this embodiment, as shown in fig. 6, the cartridge body 32 is a carbon rod cartridge having a ring structure, in this embodiment, the second cartridge 30 is a rear stage cartridge of the cartridge 20, and the water flowing from the second communication port 314 enters the cartridge body 32 through the outer side surface of the cartridge body 32 and flows out of the inner side surface of the cartridge body 32 to the communication port 313.

In order to ensure that the water flowing in from the second communication port 314 flows to the outer side surface of the cartridge body 32, as shown in fig. 6, the bottom end of the cartridge body 32 is provided with a bottom cover 323, the bottom cover 323 is hermetically connected with the bottom end of the cartridge body 32, and a gap is formed between the bottom cover 323 and the second end wall 312, and at the same time, the top end of the cartridge body 32 is hermetically connected with the end wall 311, so that the water flowing in from the second communication port 314 can only enter the cartridge body 32 through the outer side surface of the cartridge body and can flow out from the inner side surface of the cartridge body 32 after being filtered by the cartridge body 32.

Fifth embodiment:

fig. 7 is a schematic structural diagram of a composite filter element assembly according to a fifth embodiment of the present invention, unlike the third embodiment, in this embodiment, as shown in fig. 7, the cylinder 31 includes an annular side wall 315, a second end wall 312 is connected to a lower end of the annular side wall 315, and a water gap 33 is formed between the second end wall 312 and the water passing end 221.

The end of the central tube 21 facing of the second filter element 30 has a stepped side surface and the second flow port 314 has a second stepped side surface matching the stepped side surface the second flow port 314 is connected to the central tube 21 such that the second stepped side surface abuts the stepped side surface, whereby the filter element 20 supports the second filter element 30. the second flow port 314 is in communication with the second waterway 212, and the second drain 12 is in communication with the waterway 211 via the second water gap 201, the water gap 33, and the third water hole 217.

In this embodiment, a plurality of third ribs 318 extending in a radial direction are disposed on the outer side of the second end wall 312. the third ribs 318 can increase the structure of the second end wall 312 to provide -determined guiding function for the water flowing from the second water passing opening 12 to the th water passing end 221.

Sixth embodiment:

fig. 8 is a schematic view of a composite cartridge assembly according to a sixth embodiment of the present invention, different from the fifth embodiment, in this embodiment, as shown in fig. 8, the cartridge body 32 is a carbon rod cartridge having a ring structure, in this embodiment, the second cartridge 30 is a rear stage cartridge of the cartridge 20, and the water flowing from the second communication port 314 enters the cartridge body 32 through the outer side surface of the cartridge body 32 and flows out of the inner side surface of the cartridge body 32 to the communication port 313.

In order to ensure that the water flowing in from the second communication port 314 flows to the outer side surface of the cartridge body 32, as shown in fig. 8, the bottom end of the cartridge body 32 is provided with a bottom cover 323, the bottom cover 323 is hermetically connected with the bottom end of the cartridge body 32, and a gap is formed between the bottom cover 323 and the second end wall 312, and at the same time, the top end of the cartridge body 32 is hermetically connected with the end wall 311, so that the water flowing in from the second communication port 314 can only enter the cartridge body 32 through the outer side surface of the cartridge body and can flow out from the inner side surface of the cartridge body 32 after being filtered by the cartridge body 32.

In the description of the embodiments of the present invention, it should be understood that the terms "middle", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In describing the embodiments of the present invention, it should be noted that unless otherwise explicitly stated or limited, the terms "connected" and "connecting" are used to mean, for example, a fixed connection, a detachable connection, or body-based connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediary, and a communication between two elements.

Although the embodiments of the present invention have been described above, the description is only for the convenience of understanding the present invention, and the present invention is not limited thereto. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

The combined filter element assembly is characterized by comprising a shell, and a th filter element and a second filter element which are arranged in the shell, wherein the shell is provided with a th water passing port, a second water passing port and a third water passing port, the th filter element is a reverse osmosis filter element, the reverse osmosis filter element comprises a central tube body and a reverse osmosis membrane wound on the central tube body, a th end surface of the reverse osmosis membrane facing the second filter element forms a th water passing end, the inner side end of the reverse osmosis membrane forms a second water passing end, the outer side end of the reverse osmosis membrane forms a third water passing end, a water channel and a second water channel are arranged in the central tube body, the th water channel is communicated with the th water passing end, the second water channel is communicated with the second water passing end, the th water passing port is communicated with water passing ends of the and the second water channels through the second filter element, the second water passing port is communicated with the th water passing end and another water passing end of the second water passing end, and the third water passing end is communicated with the third water passing end.
2. The composite filter element assembly of claim 1, wherein said second filter element is disposed at the end of said filter element, said second filter element comprising a barrel and a filter element body disposed within said barrel, said barrel having a end wall facing said housing having a fluid port disposed thereon, said fluid port being in communication with said water port, said barrel having a second fluid port disposed on a second end wall facing said filter element, said second fluid port being connected to said central tube body such that said second fluid port is in communication with said water passing end and of said second water paths.
3. The composite filter element assembly of claim 2, wherein the cylinder comprises an annular side wall, an end of the annular side wall facing the reverse osmosis membrane is sealingly connected with an end face of the reverse osmosis membrane, a th water passing gap is formed between the second end wall and the reverse osmosis membrane, a hollow structure is arranged on a part of the annular side wall between the second end wall and the reverse osmosis membrane, the second water passing port is communicated with the th water passing end through the hollow structure and the th water passing gap, and the second water passing port is communicated with the second water path.
4. The composite filter element assembly of claim 3, wherein the central tube comprises an outer tube and an inner tube disposed inside the outer tube, wherein the end of the inner tube facing away from the second filter element is sealingly connected to the inner surface of the outer tube, the outer tube and the inner tube form the second water path therebetween, the outer tube has a water through hole formed in a wall thereof, the second water path is communicated with the second water through hole through the water through hole, the inner tube has the water path formed therein, the second flow port is connected to the central tube through a water separator, and the water separator has a channel for communicating the water gap with the water path and a second channel for communicating the second flow port with the second water path.
5. The composite filter element assembly of claim 3, wherein an axially extending water-stop plate is disposed in the central tube, the water-stop plate divides the interior of the central tube into the th water path and the second water path, the end of the second water path, which is far away from the second filter element, is closed, a th water passing hole is disposed on a side wall of the second water path, the second water path is communicated with the second water passing end through the th water passing hole, the second flow port is connected with the central tube so that the second flow port is communicated with the second water path, the end of the th water path, which faces the second filter element, is closed, a third water passing hole is disposed on a side wall of the th water path, and the th water gap and the th water path are communicated through the third water passing hole.
6. The composite filter element assembly of claim 2,

a water stop plate extending along the axial direction is arranged in the central pipe body, the water stop plate divides the interior of the central pipe body into an th water channel and a second water channel, the end of the second water channel far away from the second filter element is closed, the side wall of the second water channel is provided with a th water passing hole, the second water channel is communicated with the second water passing end through the th water passing hole, the end of the th water channel facing the second filter element is closed, and the side wall of the th water channel is provided with a third water passing hole,

the cylinder body comprises an annular side wall, the second end wall is connected with the lower end of the annular side wall, a water passing gap is arranged between the second end wall and the water passing end,

an end of the central tube body facing the second filter element has a stepped side surface, the second flow port has a second stepped side surface matching the stepped side surface, the second flow port is connected with the central tube body so that the second stepped side surface abuts against the stepped side surface, the second flow port is communicated with the second water channel, and the second water passing port is communicated with the water channel through the water passing gap and the third water passing hole.
7. The composite filter element assembly of any of claims 2-6,

the filter element body is active carbon particles filled in the cylinder body, the th flow port is communicated with the second flow port through the lower end surface of the filter element body, or,

the filter core body is for filling in the active carbon granule in the barrel, flow opening passes through the up end of filter core body with second flow opening intercommunication.
8. The composite filter element assembly of claim 7,

a flow buffering plate is arranged between the lower end surface of the filter element body and the second end wall of the cylinder body, a second water through hole is formed in the flow buffering plate, and the lower end surface of the filter element body is communicated with the second flow through hole through the second water through hole; alternatively, the first and second electrodes may be,

a buffer plate is arranged between the upper end surface of the filter element body and the th end wall of the cylinder body, a second water passing hole is formed in the buffer plate, and the upper end surface of the filter element body is communicated with the th flow opening through the second water passing hole.
9. The composite filter element assembly of any of claims 2-6,

the filter element body is a carbon rod filter element with an annular structure, water flowing in from the second flow port enters the filter element body through the outer side surface of the filter element body, flows out from the inner side surface of the filter element body and flows to the flow port, or,

the filter core body is the carbon-point filter core that has the annular structure, certainly water that the circulation mouth flowed in passes through the outside surface entering of filter core body this is internal, and certainly the inside surface outflow of filter core body, and flow to the second circulation mouth.
10. The composite filter element assembly of claim 1, further comprising an end cap positioned within said housing and retained on a second end face of said reverse osmosis filter element facing away from said second filter element, said end cap being in sealing engagement with an outer annular portion of said second end face, said second end face being in communication with said end face via said water path.