CN218491536U - Composite filter element and water purifier - Google Patents

Abstract

The utility model relates to a water purification unit technical field discloses a combined filter core and purifier. The composite filter element comprises a shell assembly, a front filter assembly, a reverse osmosis filter assembly and a rear filter assembly, the front filter assembly and the reverse osmosis filter assembly are sequentially connected in series and arranged in the shell assembly, the front filter assembly comprises an inner ring filter element and an outer ring filter element arranged on the outer peripheral side of the inner ring filter element, the reverse osmosis filter assembly comprises a reverse osmosis membrane, and the rear filter assembly comprises a rear filter element. The utility model discloses establish ties rearmounted filter assembly, leading filter assembly and reverse osmosis filter assembly in proper order and set up in casing subassembly, change when upgrading the large-pass and add more filter materials and can not increase too many diameters, realized that multistage filter core simplifies the structural design who is the single-stage filter core, simplified the core operation of trading, optimized complete machine water route system, reduced the complete machine volume, reduced product cost.

Description

Composite filter element and water purifier

Technical Field

The utility model relates to a water purification unit technical field especially relates to a combined filter core and purifier.

Background

Water purification machines on the market at present adopt 2-5 filter cores to build waterway systems mostly, and a series of problems can be faced to filter core quantity is many: the more the filter core, the more loaded down with trivial details of core operation is traded, and the complete machine water route is more complicated, changes and produces risks such as leaking, and the complete machine is with high costs, and occupation space is big.

SUMMERY OF THE UTILITY MODEL

Based on the above problem, an object of the utility model is to provide a combined filter core and purifier, trade core convenient operation, the complete machine water route is simple, and is with low costs, and occupation space is little.

In order to realize the purpose, the following technical scheme is provided:

in a first aspect, the utility model provides a composite filter element, including casing assembly, leading filtering component, reverse osmosis filter assembly and rearmounted filtering component, rearmounted filtering component leading filtering component with reverse osmosis filter assembly series connection in proper order set up in the casing assembly, leading filtering component include the inner circle filter and set up in the outer lane of inner circle filter periphery side filters the piece, reverse osmosis filter includes reverse osmosis membrane, rearmounted filtering component includes rearmounted filter.

As the utility model provides an alternative of composite filter element, casing assembly is including the lid and the shell that are connected, be provided with the raw water entry and the raw water runner that are linked together on the lid, be provided with first water proof cover in the shell, first water proof cover with be formed with raw water input channel between the inner wall of shell, raw water input channel's one end with raw water runner intercommunication, the other end with the outer lane filters the side intercommunication of intaking.

As the utility model provides a composite filter element's alternative, be provided with first support muscle on the first water proof cover, first support muscle with the inner wall of shell supports and leans on.

As the utility model provides a composite filter element's alternative, be provided with first sealed face on the first water proof cover, leading filtering component still includes leading upper end cover, be provided with first seal groove on the leading upper end cover, first sealed face with the sealed cooperation of first seal groove.

As the utility model provides an alternative of composite filter element, be provided with the water purification export and the water purification runner that are linked together on the lid, be provided with the pure water switching pipe in the shell, the inner circle filter piece with be formed with water purification input channel between the pure water switching pipe, water purification input channel with reverse osmosis membrane's the side of intaking intercommunication.

As the utility model provides a composite filter element's alternative, be provided with the fourth seal groove on the first water proof cover, the fourth seal groove pass through the second sealing washer with the sealed cooperation of outer wall of water purification runner.

As the utility model provides an alternative of composite filter element, be provided with the second water proof cover in the shell, the second water proof cover sets up in the periphery side of rearmounted filtration piece, first water proof cover sets up in the periphery side of second water proof cover, first water proof cover with be formed with water purification delivery channel between the second water proof cover, water purification delivery channel's one end with water purification input channel intercommunication, the other end with water purification runner intercommunication.

As the utility model provides an alternative of composite filter element, be provided with the sealed face of second on the second water proof cover, rearmounted filter assembly still includes back bottom end cover, be provided with the second seal groove on the back bottom end cover, the sealed face of second with the sealed cooperation of second seal groove.

As the utility model provides an alternative of composite filter element, rearmounted filtering component still includes rearmounted upper end cover, be provided with the third seal groove on the rearmounted upper end cover, the third seal groove through first sealing washer with the sealed cooperation of inner wall of second water proof cover.

As the utility model provides a composite filter element's alternative, first water proof covers and is provided with first spacing muscle, first spacing muscle with the second water proof covers pastes and leans on.

As the utility model provides a composite filter element's alternative, be provided with the fifth seal groove on the second water proof cover, be provided with the pure water runner on the lid, the fifth seal groove pass through the third sealing washer with the outer wall seal cooperation of pure water runner.

As the utility model provides an alternative of composite filter element, be provided with the waste water export and the waste water runner that are linked together on the lid, be provided with the waste water honeycomb duct in the shell, the one end of waste water honeycomb duct with reverse osmosis membrane's dense water side intercommunication, the other end with the waste water runner intercommunication.

As the utility model provides an alternative of composite filter core, the bottom of waste water honeycomb duct is provided with first waste water via hole, reverse osmosis membrane's dense water side passes through first waste water via hole with waste water honeycomb duct intercommunication.

As the utility model provides an alternative of composite filter element, rearmounted filtering component still includes rearmounted upper end cover, be provided with the sealed face of third on the rearmounted upper end cover, be provided with the top seal groove on the waste water honeycomb duct, the sealed face of third with the top seal groove passes through the sealed cooperation of fourth sealing washer.

As the utility model provides an alternative of composite filter element, rearmounted filtering component still includes the back bottom end cover, be provided with the sealed face of fourth on the back bottom end cover, be provided with the middle part seal groove on the waste water honeycomb duct, the sealed face of fourth with the sealed cooperation of middle part seal groove.

As the utility model provides an alternative of composite filter element, be provided with the pure water export and the pure water runner that are linked together on the lid, be provided with the pure water center tube in the shell, the inner circle filter piece set up in the periphery side of pure water switching pipe, reverse osmosis membrane set up in the periphery side of pure water center tube, the pure water center tube with be formed with pure water output channel between the waste water honeycomb duct, pure water output channel with the pure water runner intercommunication.

As the utility model provides an alternative of composite filter element, rearmounted filter piece pure water adapter tube with the pure water center tube establish ties in proper order set up in the periphery side of waste water honeycomb duct.

As the utility model provides an alternative of composite filter element, be provided with the bottom seal groove on the waste water honeycomb duct, be provided with the sealed face of fifth on the pure water center tube, the bottom seal groove with the sealed cooperation of the sealed face of fifth.

As the utility model provides an alternative of composite filter element, be provided with the spacing muscle of second on the pure water adapter tube, the spacing muscle of second with the outer wall of waste water honeycomb duct supports and leans on.

As the utility model provides a composite filter element's alternative, the top of the spacing muscle of second is provided with the protrusion muscle, rearmounted filter assembly still includes the back lower extreme lid, the protrusion muscle with the back lower extreme lid supports and leans on.

As the utility model provides an alternative of composite filter element, be provided with the pure water center tube in the shell, be provided with the second brace rod on the pure water center tube, the second brace rod with the inner wall of shell supports and leans on.

As the utility model provides a composite filter element's alternative, be provided with pure water center tube and pure water switching pipe in the shell, be provided with the sixth seal groove on the pure water switching pipe, be provided with the sealed face of sixth on the pure water center tube, the sixth seal groove with the sealed cooperation of face of sixth.

As the utility model provides an alternative of composite filter element, be provided with the pure water switching pipe in the shell, be provided with first pure water via hole on the pure water switching pipe, the pure water in the pure water switching pipe gets into via first pure water via hole the rearmounted piece that filters.

As the utility model provides an alternative of composite filter element, be provided with the pure water switching pipe in the shell, be provided with the seventh seal groove on the pure water switching pipe, leading filtering component still includes leading upper end cover, be provided with the sealed face of seventh on the leading upper end cover, the seventh seal groove with the sealed cooperation of face is sealed to the seventh.

As the utility model provides an alternative of composite filter element, reverse osmosis filter element still includes the reverse osmosis upper end cover, be provided with first water purification via hole on the reverse osmosis upper end cover, first water purification via hole is used for through the flow direction reverse osmosis membrane's water purification.

As the utility model provides an alternative of composite filter element, reverse osmosis filter assembly still includes the reverse osmosis upper end cover, be provided with the support ring muscle on the reverse osmosis upper end cover, the inner wall of shell be provided with the spacing long muscle that the support ring muscle supported and leans on.

As the utility model provides an alternative of composite filter element, reverse osmosis filter assembly still includes the reverse osmosis upper end cover, be provided with the third brace rod on the reverse osmosis upper end cover, the third brace rod with reverse osmosis membrane's the side of intaking is leaned on.

As the utility model provides an alternative of composite filter element, reverse osmosis filter assembly still includes the reverse osmosis upper end cover, be provided with the eighth seal groove on the reverse osmosis upper end cover, the eighth seal groove with the sealed cooperation of inner wall of shell.

As the utility model provides a composite filter element's alternative, rearmounted filtering component still includes rearmounted upper end cover, be provided with second pure water via hole on the rearmounted upper end cover.

As the utility model provides a composite filter element's alternative, second pure water via hole inboard is provided with anti-overflow carbon non-woven fabrics.

As the utility model provides an alternative of composite filter element, rearmounted filtering component still includes rearmounted upper end cover, be provided with the ninth seal groove on the rearmounted upper end cover, be provided with the waste water runner on the lid, the ninth seal groove through the fifth sealing washer with the sealed cooperation of inner wall of waste water runner.

As the utility model provides a composite filter element's alternative, rearmounted filtering component still includes rearmounted upper end cover, be provided with the fourth brace rod on the rearmounted upper end cover, the fourth brace rod with rearmounted filtering piece pastes and leans on.

As the utility model provides an alternative of composite filter element, rearmounted filtering component still includes the back bottom end cover, be provided with the sealed face of eighth on the back bottom end cover, leading filtering component still includes leading upper end cover, be provided with the tenth seal groove on the leading upper end cover, the sealed face of eighth with the sealed cooperation of tenth seal groove.

As the utility model provides an alternative of composite filter element, rearmounted filtering component still includes the back bottom end cover, be provided with the fifth brace rod on the back bottom end cover, reverse osmosis filtering component still includes the reverse osmosis upper end cover, the fifth brace rod with the reverse osmosis upper end cover pastes and leans on.

In a second aspect, the utility model also provides a water purifier, including foretell composite filter element.

The utility model has the advantages that:

the utility model provides a composite filter element and purifier, with rearmounted filter assembly, leading filter assembly and reverse osmosis filter assembly establish ties in proper order and set up in the casing subassembly, change more filter materials and can not increase too many diameters when upgrading the large flux, the raw water filters the piece with inner circle filter piece filtration for the water purification via the outer lane of leading filter assembly, the water purification filters for the pure water via reverse osmosis filter assembly's reverse osmosis membrane, the pure water can supply the user directly to drink after filtering through the rearmounted filter piece of rearmounted filter assembly, the filter effect is good, drinking water safety has been guaranteed, through with single PP + C composite filter core, the compound filter core that is PP + C + RO that is single reverse osmosis membrane filter core, the structural design that multistage filter core simplifies to single-stage filter core has been realized, the core operation of trading has been simplified, the complete machine water route system has been optimized, the complete machine volume has been reduced, the product cost is reduced.

Drawings

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

Fig. 1 is an exploded schematic view of a composite filter element according to an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of a composite filter element according to an embodiment of the present invention;

FIG. 3 is a schematic cross-sectional view of a composite filter element according to an embodiment of the present invention when pure water is separately prepared;

FIG. 4 is a schematic cross-sectional view of a composite filter element according to an embodiment of the present invention when separately preparing purified water;

fig. 5 is a schematic cross-sectional view of a cover body in a composite filter element according to an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of a first water shield in a composite filter element according to an embodiment of the present invention;

FIG. 7 is a schematic cross-sectional view of a second water shield in a composite filter element according to an embodiment of the present invention;

fig. 8 is a schematic structural view of a rear upper end cap in a composite filter element according to an embodiment of the present invention;

fig. 9 is a schematic cross-sectional view of a rear upper end cap in a composite filter element according to an embodiment of the present invention;

fig. 10 is a schematic cross-sectional view of a post-filter element in a composite filter cartridge according to an embodiment of the present invention;

fig. 11 is a schematic cross-sectional view of a rear bottom end cap of a composite filter element according to an embodiment of the present invention;

fig. 12 is a schematic cross-sectional view of a front upper end cap of a composite filter element according to an embodiment of the present invention;

fig. 13 is a schematic cross-sectional view of a pure water adapter tube in the composite filter element according to an embodiment of the present invention;

fig. 14 is a schematic cross-sectional view of an inner ring filter element of a composite filter cartridge according to an embodiment of the present invention;

fig. 15 is a schematic cross-sectional view of an outer ring filter element of a composite filter element according to an embodiment of the present invention;

FIG. 16 is a schematic cross-sectional view of a wastewater flow conduit in a composite filter element according to an embodiment of the present invention;

fig. 17 is a schematic cross-sectional view of an upper reverse osmosis end cap of a composite filter element according to an embodiment of the present invention;

fig. 18 is a schematic cross-sectional view of a pure water central tube in a composite filter element according to an embodiment of the present invention;

FIG. 19 is a schematic cross-sectional view of a reverse osmosis membrane in a composite filter element according to an embodiment of the present invention;

fig. 20 is a schematic cross-sectional view of a housing in a composite filter element according to an embodiment of the present invention.

In the figure:

1. a housing assembly; 2. a pre-filter assembly; 3. a reverse osmosis filtration component; 4. a post-filter assembly;

11. a cover body; 12. a housing; 13. a first water-insulating cover; 14. a pure water transfer pipe; 15. second water-proof

A cover; 16. a wastewater guide pipe; 17. a pure water central tube;

111. a raw water inlet; 112. a raw water flow passage; 113. a purified water outlet; 114. a purified water flow passage; 115. a waste water outlet; 116. a wastewater flow channel; 117. a pure water outlet; 118. a pure water flow passage;

121. limiting long ribs;

131. a first support rib; 132. a first sealing surface; 133. a fourth seal groove; 134. a first limiting rib;

141. a sixth seal groove; 142. a first pure water via hole; 143. a second limiting rib; 144. projecting ribs;

145. a seventh seal groove;

151. a second sealing surface; 152. a fifth seal groove;

161. a first waste water via; 162. a top seal groove; 163. a middle seal groove; 164. bottom seal

Sealing the groove;

171. a second support rib; 172. a fifth sealing surface; 173. a sixth sealing surface; 174. a fourth pure water via hole;

21. an inner ring filter element; 22. an outer ring filter element; 23. a front upper end cover;

231. a first seal groove; 232. a seventh sealing surface; 233. a tenth seal groove; 234. a second purified water via hole;

31. a reverse osmosis membrane; 32. a reverse osmosis upper end cover;

321. a first water purifying via hole; 322. supporting ring ribs; 323. a third support rib; 324. an eighth seal groove;

41. a post-filter element; 42. a rear lower end cover; 43. an upper end cover is arranged at the rear part;

421. a second seal groove; 422. a fourth sealing surface; 423. an eighth sealing surface; 424. fifth support

A rib; 425. a third pure water via hole;

431. a third seal groove; 432. a third sealing surface; 433. a second pure water via hole; 434. a ninth seal groove; 435. a fourth support rib; 436. and a second waste water via hole.

Detailed Description

In order to make the technical problems, technical solutions and technical effects achieved by the present invention more clear, the embodiments of the present invention will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments, not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.

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

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

As shown in fig. 1 to 20, the present embodiment provides a composite filter element, which includes a housing assembly 1, a front filter assembly 2, a reverse osmosis filter assembly 3 and a rear filter assembly 4, wherein the rear filter assembly 4, the front filter assembly 2 and the reverse osmosis filter assembly 3 are sequentially connected in series in the housing assembly 1, and more filter materials are more easily added and the diameter is not increased too much when a large flux is upgraded. The pre-filter assembly 2 includes an inner ring filter element 21 and an outer ring filter element 22 disposed on the outer peripheral side of the inner ring filter element 21, the reverse osmosis filter assembly 3 includes a reverse osmosis membrane 31, and the post-filter assembly 4 includes a post-filter element 41. The inner ring filter 21 may be PP cotton, the outer ring filter 22 may be origami PP cotton, and the post-filter 41 may be carbon rod, granular carbon, carbon fiber, or the like.

The raw water is filtered into the purified water through the outer ring filter piece 22 and the inner ring filter piece 21 of the front filter assembly 2, the purified water is filtered into the purified water through the reverse osmosis membrane 31 of the reverse osmosis filter assembly 3, the purified water is filtered through the rear filter piece 41 of the rear filter assembly 4 and then can be directly drunk by a user, the filter effect is good, and the drinking water safety is guaranteed. Through compounding single PP + C composite filter element, single reverse osmosis membrane 31 filter element for PP + C + RO's filter element, realized that multistage filter element simplifies the structural design who becomes single-stage filter element, simplified the core operation of trading, optimized complete machine waterway system, reduced the complete machine volume, reduced product cost.

Alternatively, the housing assembly 1 includes a cover 11 and a housing 12 connected to each other, a raw water inlet 111 and a raw water flow passage 112 are provided on the cover 11, a first water-proof cover 13 is provided in the housing 12, a raw water input passage is formed between the first water-proof cover 13 and an inner wall of the housing 12, one end of the raw water input passage is communicated with the raw water flow passage 112, and the other end is communicated with a water inlet side of the outer-ring filter member 22. The raw water from the outside enters the raw water flow passage 112 through the raw water inlet 111, enters the raw water inlet passage between the first water blocking cover 13 and the inner wall of the housing 12, and then enters the water inlet side of the outer ring filter 22 to start the preliminary filtration of the raw water. The first water-proof cover 13 can prevent raw water from mixing with purified water, and ensures the safety of drinking water.

Optionally, the first water-proof cover 13 is provided with a first supporting rib 131, and the first supporting rib 131 abuts against the inner wall of the housing 12. A plurality of first support muscle 131 set up the periphery side at first water proof cover 13 along the circumference interval, and the raw water can flow through the space between two adjacent first support muscle 131, so set up, can enough guarantee that first water proof cover 13 receives more even holding power, can guarantee again that the raw water flows through smoothly.

Optionally, the first water-proof cover 13 is provided with a first sealing surface 132, the prefilter assembly 2 further includes a prefilter cover 23, the prefilter cover 23 is used for fixedly mounting the inner-ring filter element 21 and the outer-ring filter element 22, the prefilter cover 23 is provided with a first sealing groove 231, and the first sealing surface 132 is in sealing engagement with the first sealing groove 231. Under the sealed cooperation of first sealed face 132 and first seal groove 231, can effectively avoid raw water and water purification to mix, guaranteed drinking water safety. The first water insulating cover 13 may be a substantially cylindrical body of revolution, and the first sealing surface 132 may be an inner circumferential surface. The first seal groove 231 may be provided in two or more in the axial direction depending on the desired degree of sealing.

Optionally, a purified water outlet 113 and a purified water flow passage 114 which are communicated with each other are provided on the cover body 11, a purified water adapter tube 14 is provided in the housing 12, a purified water input channel is formed between the inner ring filter member 21 and the purified water adapter tube 14, the purified water input channel is communicated with the water inlet side of the reverse osmosis membrane 31, a second water-proof cover 15 is provided in the housing 12, the second water-proof cover 15 is provided on the outer peripheral side of the post-filter member 41, the first water-proof cover 13 is provided on the outer peripheral side of the second water-proof cover 15, a purified water output channel is formed between the first water-proof cover 13 and the second water-proof cover 15, one end of the purified water output channel is communicated with the purified water input channel, and the other end is communicated with the purified water flow passage 114. Raw water in the raw water input channel enters the water inlet side of the outer ring filter piece 22 to start primary filtration of the raw water, the raw water is sequentially filtered into purified water through the outer ring filter piece 22 and the inner ring filter piece 21, and the purified water enters the purified water input channel between the inner ring filter piece 21 and the purified water adapter tube 14. When only pure water is needed, the pure water in the pure water input channel can sequentially pass through the pure water output channel and the pure water flow channel 114, and then is discharged through the pure water outlet 113. When the water needs to be further filtered into pure water, the pure water of the pure water input channel can enter the water inlet side of the reverse osmosis membrane 31. That is to say, this composite filter core both can export the water purification alone, also can export the pure water alone, can also export water purification and pure water simultaneously, and the function is various, can satisfy the demand of different application scenarios.

Optionally, a second sealing surface 151 is disposed on the second water insulating cover 15, the rear filter assembly 4 further includes a rear lower end cap 42, the rear lower end cap 42 is used for fixedly mounting the rear filter element 41, a second sealing groove 421 is disposed on the rear lower end cap 42, and the second sealing surface 151 is in sealing engagement with the second sealing groove 421. Under the sealed cooperation of the sealed face 151 of second and second seal groove 421, can effectively avoid water purification and pure water to mix, avoid influencing the drinking water taste. The second water insulating cover 15 may be a substantially cylindrical rotator, and the second sealing surface 151 may be an inner circumferential surface. The second sealing groove 421 may be provided with two or more in the axial direction, depending on the desired degree of sealing.

Optionally, the rear filter assembly 4 further includes a rear upper end cap 43, the rear upper end cap 43 is used for fixedly mounting the rear filter element 41, and a third sealing groove 431 is provided on the rear upper end cap 43, and the third sealing groove 431 is in sealing engagement with the inner wall of the second water-proof cover 15 through the first sealing ring. Realize the sealed cooperation of third seal groove 431 and second water proof cover 15 through first sealing washer, can effectively avoid water purification and pure water to mix, avoid influencing the drinking water taste. The first and third seal grooves 431 may be provided in two or more in the axial direction depending on the desired degree of sealing.

Optionally, a fourth sealing groove 133 is disposed on the first water-proof cover 13, and the fourth sealing groove 133 is in sealing fit with the outer wall of the purified water flow passage 114 through a second sealing ring. The fourth sealing groove 133 is in sealing fit with the outer wall of the water purifying flow passage 114 through the second sealing ring, so that mixing of raw water and purified water can be avoided, and drinking water safety is guaranteed. The second and fourth seal grooves 133 may be provided in two or more in the axial direction, depending on the desired degree of sealing.

In order to axially position the first water-proof cover 13 and the second water-proof cover 15, optionally, a first limiting rib 134 is arranged on the first water-proof cover 13, and the first limiting rib 134 abuts against the second water-proof cover 15. Because be formed with water purification output channel between first water proof cover 13 and the second water proof cover 15, the smooth circulation of water purification can be guaranteed to a plurality of spacing muscle 134 that set up along circumference interval. The front upper end cover 23 can be provided with a second purified water through hole 234, so that purified water can enter a purified water output channel between the first water-stop cover 13 and the second water-stop cover 15 through the second purified water through hole 234.

Optionally, a fifth sealing groove 152 is formed in the second water-proof cover 15, the pure water flow passage 118 is formed in the cover 11, and the fifth sealing groove 152 is in sealing engagement with an outer wall of the pure water flow passage 118 through a third sealing ring. Realize the sealed cooperation of fifth seal groove 152 and the outer wall of pure water runner 118 through the third sealing washer, can avoid water purification and pure water to mix, avoid influencing the drinking water taste. The third and fifth seal grooves 152 may be provided in two or more in the axial direction, depending on the desired degree of sealing.

Optionally, a wastewater outlet 115 and a wastewater channel 116 which are communicated with each other are provided on the lid 11, a wastewater guide pipe 16 is provided in the housing 12, one end of the wastewater guide pipe 16 is communicated with the concentrate side of the reverse osmosis membrane 31, and the other end is communicated with the wastewater channel 116. The purified water is filtered into pure water and wastewater by the reverse osmosis membrane 31, and the wastewater collected on the concentrated water side of the reverse osmosis membrane 31 enters the wastewater runner 116 through the wastewater draft tube 16 and is discharged through the wastewater outlet 115. The wastewater guide pipe 16 can be arranged at the center of the shell 12, the wastewater guide pipe 16 adopts a whole slender pipe structure, occupies small volume, has good sealing performance, ensures that wastewater is directly discharged from the concentrated water side of the reverse osmosis membrane 31 through the wastewater flow channel 116 and the wastewater outlet 115, and avoids polluting raw water, purified water and pure water.

To facilitate the circulation of the wastewater, optionally, the bottom of the wastewater draft tube 16 is provided with a first wastewater via hole 161, and the concentrate side of the reverse osmosis membrane 31 is communicated with the wastewater draft tube 16 through the first wastewater via hole 161. The first waste water passing hole 161 may be provided in plurality along the circumferential direction of the waste water guide pipe 16, thereby improving the waste water circulation efficiency.

Optionally, a third sealing surface 432 is disposed on the rear upper end cover 43, a top sealing groove 162 is disposed on the wastewater guide pipe 16, and the third sealing surface 432 is in sealing engagement with the top sealing groove 162 through a fourth sealing ring. Under the sealed cooperation of third sealed face 432 and top seal groove 162, can effectively avoid pure water and waste water to mix, guaranteed drinking water safety. The top seal groove 162 may be provided in two or more axial directions depending on the desired degree of sealing. The rear upper end cap 43 may be provided with a second waste water via hole, the second waste water via hole is communicated with the inner cavity of the waste water guide pipe 16, and waste water in the waste water guide pipe 16 enters the waste water runner 116 through the second waste water via hole and is discharged through the waste water outlet 115.

Optionally, a fourth sealing surface 422 is disposed on the rear lower end cover 42, a middle sealing groove 163 is disposed on the wastewater guide pipe 16, and the fourth sealing surface 422 is in sealing engagement with the middle sealing groove 163. Under the sealed cooperation of the fourth sealing surface 422 and the middle sealing groove 163, the mixing of pure water and waste water can be effectively avoided, and the drinking water safety is ensured. The middle seal groove 163 may be provided in two or more in the axial direction, depending on the desired degree of sealing.

Optionally, a pure water outlet 117 and a pure water flow passage 118 which are communicated with each other are provided on the cover 11, a pure water central tube 17 is provided in the housing 12, an inner ring filter 21 is provided on an outer peripheral side of the pure water adapter tube 14, a reverse osmosis membrane 31 is provided on an outer peripheral side of the pure water central tube 17, a pure water output channel is formed between the pure water central tube 17 and the wastewater guide tube 16, and the pure water output channel is communicated with the pure water flow passage 118. The purified water is filtered into pure water through the reverse osmosis membrane 31, and the pure water enters a pure water output channel between the pure water central pipe 17 and the wastewater guide pipe 16, then enters a pure water flow channel 118, and is discharged through a pure water outlet 117 for a user to drink. The pure water central pipe 17 may be provided with a fourth pure water through hole 174 for communicating the inner cavity of the pure water central pipe 17 with the reverse osmosis membrane 31, and pure water formed after the pure water is filtered by the reverse osmosis membrane 31 enters the inner cavity of the pure water central pipe 17 through the fourth pure water through hole 174.

In order to reduce the occupied space, optionally, the post-filter 41, the pure water adapter tube 14 and the pure water central tube 17 are sequentially arranged in series on the outer periphery side of the wastewater guide tube 16.

Optionally, a bottom sealing groove 164 is formed in the wastewater guide pipe 16, a fifth sealing surface 172 is formed in the pure water central pipe 17, and the bottom sealing groove 164 is in sealing fit with the fifth sealing surface 172. Under the sealed cooperation of the fifth sealing surface 172 and the bottom sealing groove 164, the mixing of pure water and waste water can be effectively avoided, and the drinking water safety is ensured. The bottom seal groove 164 may be axially disposed in two or more numbers, depending on the desired degree of sealing.

Optionally, a second support rib 171 is provided on the pure water center pipe 17, and the second support rib 171 abuts against the inner wall of the housing 12. A plurality of second brace rods 171 set up in the bottom of pure water center tube 17 along circumference interval, and the waste water of reverse osmosis membrane 31's dense water side can flow through the space between two adjacent second brace rods 171, so set up, can enough guarantee that pure water center tube 17 receives more even holding power, can guarantee again that waste water flows through smoothly.

Optionally, a sixth sealing groove 141 is formed in the pure water adaptor tube 14, a sixth sealing surface 173 is formed in the pure water central tube 17, and the sixth sealing groove 141 is in sealing fit with the sixth sealing surface 173. Under the sealing cooperation of the sixth sealing surface 173 and the sixth sealing groove 141, the sealing performance of the pure water central pipe 17 and the pure water adapter pipe 14 is ensured, the mixing of pure water and waste water or pure water can be effectively avoided, and the drinking water safety is ensured. The sixth sealing groove 141 may be provided in two or more in the axial direction according to a desired degree of sealing.

In order to facilitate the circulation of pure water, optionally, a first pure water through hole 142 is provided on the pure water adapter tube 14, and pure water in the pure water adapter tube 14 enters the post-filter 41 through the first pure water through hole 142. The first pure water passing holes 142 may be provided in a plurality in the circumferential direction of the pure water adapter tube 14, thereby improving the circulation efficiency of pure water.

In order to avoid the pure water adapter tube 14 from shaking relative to the wastewater guide tube 16, optionally, the pure water adapter tube 14 is provided with a second limiting rib 143, and the second limiting rib 143 abuts against the outer wall of the wastewater guide tube 16. The second limiting ribs 143 can be arranged in a plurality at intervals along the circumferential direction, so that the pure water adapter tube 14 can be guaranteed to receive uniform supporting force, and pure water can be guaranteed to flow through smoothly.

In order to axially position the pure water adapter tube 14 and the rear lower end cap 42, optionally, a protruding rib 144 is disposed on the top of the second limiting rib 143, and the protruding rib 144 abuts against the rear lower end cap 42.

Optionally, a seventh sealing groove 145 is formed in the pure water adapter tube 14, a seventh sealing surface 232 is formed in the front upper end cover 23, and the seventh sealing groove 145 is in sealing fit with the seventh sealing surface 232. Under the sealed cooperation of seventh sealed face 232 and seventh seal groove 145, can effectively avoid pure water and water mixing, guarantee the drinking water taste. The seventh seal groove 145 may be provided in two or more in the axial direction, depending on the desired degree of sealing.

In order to facilitate the circulation of purified water, optionally, the reverse osmosis filtration module 3 further comprises a reverse osmosis upper end cap 32, wherein a first purified water through hole 321 is formed in the reverse osmosis upper end cap 32, and the first purified water through hole 321 is used for purified water flowing to the reverse osmosis membrane 31. The first purified water passing hole 321 may be provided in a plurality in the circumferential direction of the reverse osmosis upper end cap 32, so that purified water circulation efficiency is improved.

Optionally, a support ring rib 322 is arranged on the reverse osmosis upper end cover 32, and a limiting long rib 121 abutted against the support ring rib 322 is arranged on the inner wall of the housing 12. The support ring rib 322 and the limit long rib 121 are abutted, so that the axial positioning of the reverse osmosis upper end cover 32 and the shell 12 is realized, and the installation accuracy of the reverse osmosis upper end cover 32 is ensured.

Optionally, a third support rib 323 is arranged on the reverse osmosis upper end cover 32, and the third support rib 323 abuts against the water inlet side of the reverse osmosis membrane 31. The third support rib 323 is attached to the water inlet side of the reverse osmosis membrane 31, so that the axial positioning of the reverse osmosis upper end cover 32 and the reverse osmosis membrane 31 is realized, and the installation accuracy of the reverse osmosis membrane 31 is ensured.

Optionally, an eighth seal groove 324 is provided on the reverse osmosis upper end cap 32, and the eighth seal groove 324 is in sealing engagement with the inner wall of the housing 12. Under the sealing fit of the eighth sealing groove 324 and the inner wall of the housing 12, the mixing of raw water and purified water can be effectively avoided, and the drinking water safety is ensured. Eight sealing grooves 324 may be provided in two or more axial directions depending on the desired degree of sealing.

In order to facilitate the circulation of pure water, a second pure water via 433 is optionally provided on the rear upper end cap 43. Second pure water via hole 433 can be provided with a plurality ofly along the circumference of rearmounted upper end cover 43, improves the water purification circulation efficiency.

In order to prevent carbon leakage, optionally, an anti-overflow carbon non-woven fabric is disposed inside the second pure water via hole 433.

Optionally, a ninth sealing groove 434 is formed in the rear upper end cover 43, the waste water runner 116 is formed in the cover 11, and the ninth sealing groove 434 is in sealing fit with the inner wall of the waste water runner 116 through a fifth sealing ring. Under the sealing fit of the ninth sealing groove 434 and the inner wall of the wastewater runner 116, the wastewater can be effectively prevented from being mixed with the pure water, and the drinking safety is ensured. The ninth sealing groove 434 may be provided in two or more in the axial direction depending on the desired degree of sealing.

Optionally, a fourth support rib 435 is provided on the rear upper end cover 43, and the fourth support rib 435 abuts against the rear filter element 41. The fourth support rib 435 and the post-filter 41 are attached to each other, so that the axial positioning of the post-upper end cover 43 and the post-filter 41 is realized, and the installation accuracy of the post-filter 41 is ensured.

Optionally, an eighth sealing surface 423 is disposed on the rear lower end cover 42, a tenth sealing groove 233 is disposed on the front upper end cover 23, and the eighth sealing surface 423 is in sealing engagement with the tenth sealing groove 233. Under the sealed cooperation of eighth sealed face 423 and tenth seal groove 233, can effectively avoid pure water and water purification to mix, guarantee the drinking water taste. The tenth sealing groove 233 may be provided in two or more in the axial direction depending on a desired degree of sealing.

Optionally, the rear lower end cap 42 is provided with a fifth support rib 424, and the fifth support rib 424 abuts against the reverse osmosis upper end cap 32. The fifth support rib 424 is attached to the reverse osmosis upper end cover 32, so that the rear lower end cover 42 and the reverse osmosis upper end cover 32 are axially positioned, and the installation accuracy of the reverse osmosis upper end cover 32 is ensured. The rear lower end cap 42 may be provided with a third pure water through hole 425, and pure water in the pure water adapter tube 14 enters the water inlet side of the rear filter 41 through the third pure water through hole 425.

When the purified water is prepared separately, the raw water flows to the raw water flow passage 112 through the raw water inlet 111, firstly enters the raw water input passage between the first water-stop cover 13 and the inner wall of the housing 12, then flows to the raw water input passage between the outer ring filter piece 22 and the inner wall of the housing 12, then sequentially passes through the outer ring filter piece 22 and the inner ring filter piece 21 to be filtered to form the purified water, and a part of the purified water flows upwards through the second purified water through hole 234 of the front upper end cover 23, enters the purified water output passage between the first water-stop cover 13 and the second water-stop cover 15, and then flows to the purified water flow passage 114 and the purified water outlet 113; the other part of the purified water enters the reverse osmosis membrane 31 all the way down, and because the raw water pressure during the purified water preparation is the tap water pressure (generally between 0.1-0.4 MPa), and the purified water outlet 117 is closed, the purified water is hardly generated, and after passing through the reverse osmosis membrane 31, the purified water enters the wastewater draft tube 16 through the first wastewater through hole 161, and finally flows out from the wastewater outlet 115. Salt ions and the like accumulated on the concentrated water side of the reverse osmosis membrane 31 in the process can be taken away by purified water, so that the amount of the salt ions diffused to the pure water side is very small, when the purified water is prepared again by the water purifier, the TDS value of the first cup of water can not rise almost, and the water safety of a user is guaranteed.

When pure water is prepared separately, pressurized raw water flows to the raw water flow passage 112 through the raw water inlet 111, firstly enters the raw water input passage between the first water-proof cover 13 and the inner wall of the shell 12, then flows to the raw water input passage between the outer ring filter member 22 and the inner wall of the shell 12, then sequentially passes through the outer ring filter member 22 and the inner ring filter member 21 to be filtered to form purified water, as the purified water outlet 113 is closed, the purified water flows to the reverse osmosis membrane 31 through the reverse osmosis upper end cover 32, the filtered pure water enters the pure water output passage between the pure water central pipe 17 and the wastewater guide pipe 16, and then flows to the post-filter member 41 through the passage between the pure water adapter pipe 14 and the wastewater guide pipe 16, the pure water enters the post-filter member 41 through the third pure water through hole 425 on the post-lower end cover 42 to be filtered, and flows to the pure water flow passage 118 through the second pure water through hole 433 of the post-upper end cover 43 and then flows out of the pure water outlet 117; the wastewater enters the wastewater guide pipe 16 through the first wastewater through hole 161, then enters the second wastewater through hole of the rear upper end cover 43, and then flows out through the wastewater outlet 115.

The embodiment still provides a water purifier, including foretell composite filter element, with rearmounted filter assembly 4, leading filter assembly 2 and reverse osmosis filter assembly 3 establish ties in proper order and set up in casing subassembly 1, change when upgrading the big flux and add more filter materials and can not increase too many diameters, the raw water filters for the water purification via outer lane filter piece 22 and the inner circle filter piece 21 of leading filter assembly 2, the water purification filters for the pure water via reverse osmosis membrane 31 of reverse osmosis filter assembly 3, the pure water can supply the user directly to drink after filtering through rearmounted filter piece 41 of rearmounted filter assembly 4, the filter effect is good, drinking water safety has been guaranteed, through with single PP + C composite filter element, the filter core of single reverse osmosis membrane 31 complex for PP + C + RO, the structural design that multistage filter core simplifies to single-stage filter core has been realized, the core operation of trading has been simplified, water path system has been optimized, the volume has been reduced, product cost is reduced.

It should be noted that the foregoing is only illustrative of the preferred embodiments of the present invention and the technical principles applied thereto. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments illustrated herein, but is capable of various obvious modifications, rearrangements and substitutions without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (35)

1. The utility model provides a composite filter element, its characterized in that, includes casing subassembly (1), leading filtering component (2), reverse osmosis filtering component (3) and rearmounted filtering component (4), rearmounted filtering component (4) leading filtering component (2) with reverse osmosis filtering component (3) establish ties in proper order set up in casing subassembly (1), leading filtering component (2) include that the inner circle filters piece (21) and set up in the outer lane of inner circle filtration piece (21) periphery side filters piece (22), reverse osmosis filtering component (3) include reverse osmosis membrane (31), rearmounted filtering component (4) include rearmounted filtration piece (41).

2. The composite filter element according to claim 1, wherein the housing assembly (1) comprises a cover (11) and a shell (12) which are connected, a raw water inlet (111) and a raw water flow passage (112) which are communicated with each other are arranged on the cover (11), a first water-proof cover (13) is arranged in the shell (12), a raw water input channel is formed between the first water-proof cover (13) and the inner wall of the shell (12), one end of the raw water input channel is communicated with the raw water flow passage (112), and the other end of the raw water input channel is communicated with the water inlet side of the outer ring filter element (22).

3. The composite filter element according to claim 2, characterized in that the first water-proof cover (13) is provided with first support ribs (131), the first support ribs (131) abutting against the inner wall of the housing (12).

4. The composite filter element according to claim 2 wherein a first sealing surface (132) is provided on the first water shield (13), the pre-filter assembly (2) further comprising a pre-head cap (23), a first sealing groove (231) being provided on the pre-head cap (23), the first sealing surface (132) being in sealing engagement with the first sealing groove (231).

5. The composite filter element according to claim 2, wherein the cover (11) is provided with a purified water outlet (113) and a purified water flow passage (114) which are communicated with each other, the housing (12) is provided with a purified water transfer pipe (14) therein, a purified water input passage is formed between the inner ring filter member (21) and the purified water transfer pipe (14), and the purified water input passage is communicated with the water inlet side of the reverse osmosis membrane (31).

6. The composite filter element according to claim 5, wherein a fourth sealing groove (133) is formed in the first water-proof cover (13), and the fourth sealing groove (133) is in sealing fit with the outer wall of the purified water flow passage (114) through a second sealing ring.

7. The composite filter element according to claim 5, wherein a second water-proof cover (15) is arranged in the housing (12), the second water-proof cover (15) is arranged on the outer peripheral side of the post-filter element (41), the first water-proof cover (13) is arranged on the outer peripheral side of the second water-proof cover (15), a purified water output channel is formed between the first water-proof cover (13) and the second water-proof cover (15), one end of the purified water output channel is communicated with the purified water input channel, and the other end of the purified water output channel is communicated with the purified water flow channel (114).

8. The composite filter element according to claim 7, wherein a second sealing surface (151) is provided on the second water-proof cover (15), the rear filter assembly (4) further comprises a rear lower end cap (42), a second sealing groove (421) is provided on the rear lower end cap (42), and the second sealing surface (151) is in sealing engagement with the second sealing groove (421).

9. The composite filter element according to claim 7, wherein the rear filter assembly (4) further comprises a rear upper end cap (43), wherein a third sealing groove (431) is formed in the rear upper end cap (43), and the third sealing groove (431) is in sealing fit with the inner wall of the second water-proof cover (15) through a first sealing ring.

10. The composite filter element according to claim 7, characterized in that a first limiting rib (134) is arranged on the first water-proof cover (13), and the first limiting rib (134) is attached to the second water-proof cover (15).

11. The composite filter element according to claim 7, wherein a fifth sealing groove (152) is formed in the second water-proof cover (15), a pure water flow passage (118) is formed in the cover body (11), and the fifth sealing groove (152) is in sealing fit with the outer wall of the pure water flow passage (118) through a third sealing ring.

12. The composite filter element according to claim 2, characterized in that the cover (11) is provided with a wastewater outlet (115) and a wastewater channel (116) which are communicated with each other, and a wastewater guide pipe (16) is arranged in the housing (12), wherein one end of the wastewater guide pipe (16) is communicated with the concentrate side of the reverse osmosis membrane (31), and the other end is communicated with the wastewater channel (116).

13. The composite filter element according to claim 12, wherein the bottom of the wastewater draft tube (16) is provided with a first wastewater through hole (161), and the concentrate side of the reverse osmosis membrane (31) is communicated with the wastewater draft tube (16) through the first wastewater through hole (161).

14. The composite filter element according to claim 12, wherein the rear filter assembly (4) further comprises a rear upper end cap (43), a third sealing surface (432) is provided on the rear upper end cap (43), a top sealing groove (162) is provided on the wastewater guide pipe (16), and the third sealing surface (432) is in sealing engagement with the top sealing groove (162) through a fourth sealing ring.

15. The composite filter element of claim 12, wherein the post-filter assembly (4) further comprises a post-bottom end cap (42), wherein a fourth sealing surface (422) is disposed on the post-bottom end cap (42), wherein a middle sealing groove (163) is disposed on the waste water guide pipe (16), and wherein the fourth sealing surface (422) is in sealing engagement with the middle sealing groove (163).

16. The composite filter element according to claim 12, wherein a pure water outlet (117) and a pure water flow passage (118) which are communicated with each other are arranged on the cover body (11), a pure water central tube (17) and a pure water adapter tube (14) are arranged in the housing (12), the inner ring filter piece (21) is arranged on the outer peripheral side of the pure water adapter tube (14), the reverse osmosis membrane (31) is arranged on the outer peripheral side of the pure water central tube (17), a pure water output channel is formed between the pure water central tube (17) and the wastewater guide tube (16), and the pure water output channel is communicated with the pure water flow passage (118).

17. The composite filter element according to claim 16, characterized in that the post-filter element (41), the pure water adapter tube (14) and the pure water central tube (17) are arranged in series in sequence on the outer circumference of the waste water guide tube (16).

18. The composite filter element according to claim 16, wherein a bottom sealing groove (164) is formed in the wastewater guide pipe (16), a fifth sealing surface (172) is formed in the pure water center pipe (17), and the bottom sealing groove (164) is in sealing fit with the fifth sealing surface (172).

19. The composite filter element according to claim 16, wherein a second limiting rib (143) is arranged on the pure water adapter tube (14), and the second limiting rib (143) abuts against the outer wall of the wastewater guide tube (16).

20. The composite filter element according to claim 19, wherein a protruding rib (144) is provided at the top of the second limiting rib (143), the rear filter assembly (4) further comprises a rear lower end cap (42), and the protruding rib (144) abuts against the rear lower end cap (42).

21. The composite filter element according to claim 2, wherein a pure water central pipe (17) is arranged in the shell (12), a second support rib (171) is arranged on the pure water central pipe (17), and the second support rib (171) is abutted against the inner wall of the shell (12).

22. The composite filter element according to claim 2, wherein a pure water central pipe (17) and a pure water adapter pipe (14) are arranged in the housing (12), a sixth sealing groove (141) is arranged on the pure water adapter pipe (14), a sixth sealing surface (173) is arranged on the pure water central pipe (17), and the sixth sealing groove (141) is in sealing fit with the sixth sealing surface (173).

23. The composite filter element according to claim 2, characterized in that a pure water adapter tube (14) is arranged in the housing (12), a first pure water through hole (142) is arranged on the pure water adapter tube (14), and pure water in the pure water adapter tube (14) enters the post-filter element (41) through the first pure water through hole (142).

24. The composite filter element according to claim 2, wherein a pure water adapter tube (14) is arranged in the housing (12), a seventh sealing groove (145) is arranged on the pure water adapter tube (14), the front filter assembly (2) further comprises a front upper end cap (23), a seventh sealing surface (232) is arranged on the front upper end cap (23), and the seventh sealing groove (145) is in sealing fit with the seventh sealing surface (232).

25. The composite filter element according to any one of claims 1 to 24, wherein the reverse osmosis filtration module (3) further comprises a reverse osmosis upper end cap (32), wherein the reverse osmosis upper end cap (32) is provided with a first purified water passing hole (321), and the first purified water passing hole (321) is used for passing purified water flowing to the reverse osmosis membrane (31).

26. The composite filter element according to any one of claims 2 to 24, wherein the reverse osmosis filtration assembly (3) further comprises a reverse osmosis upper end cover (32), a support ring rib (322) is arranged on the reverse osmosis upper end cover (32), and a limiting long rib (121) abutting against the support ring rib (322) is arranged on the inner wall of the shell (12).

27. The composite filter element according to any one of claims 1 to 24, wherein the reverse osmosis filtration module (3) further comprises a reverse osmosis upper end cap (32), and a third support rib (323) is arranged on the reverse osmosis upper end cap (32), and the third support rib (323) is abutted against the water inlet side of the reverse osmosis membrane (31).

28. The composite filter element according to any one of claims 2 to 24, wherein the reverse osmosis filtration assembly (3) further comprises a reverse osmosis upper end cap (32), wherein an eighth seal groove (324) is formed in the reverse osmosis upper end cap (32), and the eighth seal groove (324) is in sealing fit with the inner wall of the housing (12).

29. The composite filter element according to any one of claims 1 to 24, wherein the post-filter assembly (4) further comprises a post-upper end cap (43), the post-upper end cap (43) being provided with a second pure water passage hole (433).

30. The composite filter element according to claim 29, wherein a non-overflow carbon non-woven fabric is arranged inside the second pure water passing hole (433).

31. The composite filter element according to any one of claims 2 to 24, wherein the rear filter assembly (4) further comprises a rear upper end cap (43), a ninth sealing groove (434) is formed in the rear upper end cap (43), the cover body (11) is provided with a waste water channel (116), and the ninth sealing groove (434) is in sealing fit with the inner wall of the waste water channel (116) through a fifth sealing ring.

32. A composite filter element according to any one of claims 1 to 24, characterised in that the post-filter assembly (4) further comprises a post-upper end cap (43), the post-upper end cap (43) being provided with fourth support ribs (435), the fourth support ribs (435) abutting against the post-filter element (41).

33. The composite filter element according to any one of claims 1 to 24 wherein the rear filter assembly (4) further comprises a rear bottom end cap (42), wherein an eighth sealing surface (423) is provided on the rear bottom end cap (42), wherein the front filter assembly (2) further comprises a front top end cap (23), wherein a tenth sealing groove (233) is provided on the front top end cap (23), and wherein the eighth sealing surface (423) is in sealing engagement with the tenth sealing groove (233).

34. The composite filter element according to any one of claims 1 to 24, wherein the rear filter assembly (4) further comprises a rear lower end cap (42), a fifth support rib (424) is arranged on the rear lower end cap (42), the reverse osmosis filter assembly (3) further comprises a reverse osmosis upper end cap (32), and the fifth support rib (424) abuts against the reverse osmosis upper end cap (32).

35. A water purification machine comprising a composite filter element as claimed in any one of claims 1 to 34.

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