CN109694138B - Reverse osmosis composite filter element assembly - Google Patents

Reverse osmosis composite filter element assembly Download PDF

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Publication number
CN109694138B
CN109694138B CN201710983782.9A CN201710983782A CN109694138B CN 109694138 B CN109694138 B CN 109694138B CN 201710983782 A CN201710983782 A CN 201710983782A CN 109694138 B CN109694138 B CN 109694138B
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reverse osmosis
water
wall
filter element
mounting head
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CN109694138A (en
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王旭宁
宋斌
刘宗印
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Joyoung Co Ltd
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Joyoung Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/28Treatment of water, waste water, or sewage by sorption
    • C02F1/283Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/02Odour removal or prevention of malodour

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Water Treatment By Sorption (AREA)

Abstract

The invention discloses a reverse osmosis composite filter element assembly, which comprises an installation head, a shell and a reverse osmosis filter element positioned in the shell, wherein a first water passing gap is formed between the reverse osmosis filter element and the shell, the installation head is positioned at the end part of the shell, a raw water inlet, a pure water outlet and a concentrated water outlet are arranged on the installation head, a rear purification unit is arranged between the reverse osmosis filter element and the installation head, a central pipe is communicated with the pure water outlet through the rear purification unit, one of the raw water inlet or the concentrated water outlet is communicated with one end, close to the installation head, of the reverse osmosis filter element through a first flow passage, a second water passing gap is formed between the rear purification unit and the shell, and the other of the raw water inlet or the concentrated water outlet is communicated with one end, far away from the installation head, of the reverse osmosis filter element through the second water passing gap and the first water passing gap. The invention reduces the number of the filter elements in the water purifier and simplifies the pipeline layout among the filter elements.

Description

Reverse osmosis composite filter element assembly
Technical Field
The invention relates to a reverse osmosis composite filter element assembly, and belongs to the technical field of water treatment.
Background
Along with the improvement of the requirements of people on the quality of drinking water, a pure water system gradually enters a drinking water system of every family. The existing reverse osmosis water purifier is generally four-stage filtration, and each stage of filtration has a filter element. The first-stage PP cotton filter element mainly filters large-particle impurities; the second-stage front activated carbon filter element is mainly used for adsorbing impurities such as heterochromatic peculiar smell, colloid, residual chlorine and the like and protecting a reverse osmosis filter element at the rear end; the third-stage reverse osmosis filter element can filter impurities such as organic matters, colloid, bacteria, viruses and the like in raw water, particularly has extremely high filtering efficiency on impurities such as inorganic salt, heavy metal ions and the like, so that the reverse osmosis filter element forms a core component of the water purifier, and the filtering effect of the water purifier is directly related to that of the reverse osmosis filter element; the fourth-stage rear active carbon filter element mainly plays a role in absorbing heterochromatic peculiar smell and improving the taste. The four filter elements respectively play their roles, one of the filter elements is absent, and the other filter element can be a PP cotton filter element or an ultrafiltration filter element between the front active carbon filter element and the reverse osmosis filter element, so that the protection effect and the purification effect on the reverse osmosis filter element are further improved. However, the structure of a plurality of filter cores results in that the complete machine is bulky, occupies a large amount of kitchen spaces, and simultaneously, the pipeline overall arrangement between the filter cores is complicated, has improved the risk of leaking, and in addition, the filter core also can lead to filter core life monitoring and warning to complicate more, and the filter core is changed also relatively complicatedly, if have the filter core of the same or similar structure among the multistage filter core, the user has the possibility of changing the mistake even when changing the filter core, has influenced the purifying effect and the user experience of purifier greatly.
Disclosure of Invention
The invention provides a reverse osmosis composite filter element assembly, which aims at solving a series of problems of large volume, complex pipeline layout among filter elements, complex monitoring and reminding of filter element service life, complex replacement of filter elements and the like caused by a plurality of filter elements in a reverse osmosis water purifier, and the like, and comprises an installation head, a shell and a reverse osmosis filter element positioned in the shell, wherein a first water passing gap is formed between the reverse osmosis filter element and the shell, the installation head is positioned at the end part of the shell, the installation head is provided with a raw water inlet, a pure water outlet and a concentrated water outlet, the reverse osmosis filter element comprises a central tube and a reverse osmosis membrane wound on the central tube, and a raw water guide layer and a pure water guide layer communicated with the central tube are formed in the reverse osmosis membrane, and the reverse osmosis composite filter element assembly is characterized by comprising: the rear purification unit is positioned between the reverse osmosis filter element and the mounting head, and the central pipe is communicated with the pure water outlet through the rear purification unit; the first flow passage is communicated with one of the raw water inlet or the concentrated water outlet and one end of the reverse osmosis filter element, which is close to the mounting head; and the other of the raw water inlet or the concentrated water outlet is communicated with one end of the reverse osmosis filter element, which is far away from the mounting head, through the second water passing gap and the first water passing gap.
Furthermore, the rear purification unit comprises a cylinder body and a filter material positioned in the cylinder body, the cylinder body comprises a top wall close to one end of the mounting head, a bottom wall far away from one end of the mounting head and a peripheral wall, the second water passing gap is positioned between the cylinder body and the shell, a water guide pipe is arranged in the rear purification unit, a first flow channel is formed in the water guide pipe, and a filter material filling area is arranged between the outer wall of the water guide pipe and the inner wall of the cylinder body.
Furthermore, a first through hole communicated with the filter material filling area and the pure water outlet is formed in the top wall of the cylinder body, a first channel and a second channel penetrating through the bottom wall of the cylinder body are arranged in the rear purification unit, the first channel is communicated with the central pipe and the filter material filling area, and the second channel is communicated with the water guide pipe and one end, close to the mounting head, of the reverse osmosis filter element.
Furthermore, the first channel and the second channel are positioned in the flow divider, the bottom wall of the barrel is provided with a second through hole, the side wall of the flow divider is in sealing fit with the hole edge of the second through hole, the flow divider is divided into a first section close to the mounting head and a second section far away from the mounting head by taking the sealing fit part with the second through hole as a boundary, the side wall of the first section is provided with a first overflowing hole, the end part of the second section is provided with a second overflowing hole, the first overflowing hole is communicated with the filter material filling area, the second overflowing hole is communicated with the central pipe, a first channel is arranged between the first overflowing hole and the second overflowing hole, the side wall of the second section is provided with a third overflowing hole, the end part of the first section is provided with a fourth overflowing hole, the third overflowing hole is communicated with one end, close to the mounting head, of the reverse osmosis filter element, the fourth overflowing hole is communicated with the water guide pipe, and a second channel is arranged between the third overflowing hole and the fourth overflowing hole, the first section is provided with a first sealing part which is in sealing fit with the pipe wall of the water guide pipe between the fourth overflowing hole and the first overflowing hole, and the second section is provided with a second sealing part which is in sealing fit with the pipe wall of the central pipe between the second overflowing hole and the third overflowing hole.
Furthermore, the filter material is granular activated carbon, pure water passes through the granular activated carbon along the axial direction, a first flow dividing plate is arranged on the bottom wall of the cylinder body, a plurality of water passing holes are formed in the first flow dividing plate, a first flow dividing gap is formed between the first flow dividing plate and the bottom wall of the cylinder body, and the first channel is communicated with the granular activated carbon sequentially through the first flow dividing gap and the water passing holes in the first flow dividing plate; or, the filter media is granular activated carbon, and the granular activated carbon is passed through along the axial to the pure water, the second reposition of redundant personnel board has been placed on the roof of barrel, be equipped with a plurality of water holes of crossing on the second reposition of redundant personnel board, form the second reposition of redundant personnel clearance between the diapire of second reposition of redundant personnel board and barrel, granular activated carbon loops through water hole and the second reposition of redundant personnel clearance on the second reposition of redundant personnel board and communicates with each other with first through-hole.
Further, the filter media is rod-shaped activated carbon, the center of rod-shaped activated carbon is equipped with the centre runner, form the clearance runner between the lateral wall of rod-shaped activated carbon and the inner wall of barrel, rod-shaped activated carbon is kept away from installation head one end and is equipped with the end cover of sealed this tip, the end cover seals the centre runner and keeps away from installation head one end, form the third reposition of redundant personnel clearance between the diapire of end cover and barrel, first passageway communicates with each other through third reposition of redundant personnel clearance and clearance runner, the centre runner is close to installation head one end and communicates with each other with first through-hole.
Furthermore, a first sealing annular wall is arranged at one end, close to the reverse osmosis filter element, of the barrel body, and the first sealing annular wall is in sealing fit with the side wall, close to one end of the mounting head, of the reverse osmosis filter element.
Furthermore, a positioning step is arranged on the inner wall of the first sealing ring wall, and the positioning step and one end, close to the mounting head, of the reverse osmosis filter element are abutted and positioned, so that an overflowing gap for water to pass through is formed between the bottom wall of the barrel and the end, close to the mounting head, of the reverse osmosis filter element; or, the outer side of the bottom wall of the barrel body is provided with a guide rib extending along the radial direction, the guide rib is abutted against the end part of the reverse osmosis filter element close to the mounting head, and then an overflowing gap for water flow to pass through is formed between the bottom wall of the barrel body and the end part of the reverse osmosis filter element close to the mounting head.
Furthermore, the top wall of the cylinder body is provided with a pure water outlet pipe extending outwards, the outer end part of the pure water outlet pipe forms one of a raw water inlet and a concentrated water outlet, the pure water outlet pipe is communicated with the water guide pipe, the top wall of the cylinder body is provided with a water passing groove at the periphery of the pure water outlet pipe, the water passing groove is a first through hole, a water path converter is arranged between the mounting head and the cylinder body, the water path converter is sleeved outside the pure water outlet pipe and forms a second flow passage with the pipe wall of the pure water outlet pipe, the second flow channel is communicated with the filter material filling area through a water passing groove, the periphery of the water passing groove is provided with a sealing ring rib extending towards the mounting head, one end of the waterway converter, which is far away from the mounting head, is in sealing fit with the sealing ring rib, a third water passing gap is formed between the outer wall of the waterway converter and the inner wall of the mounting head, and the third water passing gap is communicated with the second water passing gap; or the top wall of the cylinder body is provided with a pure water outlet pipe extending outwards, the outer end part of the pure water outlet pipe forms one of a raw water inlet or a concentrated water outlet, the pure water outlet pipe is communicated with the water guide pipe, the top wall of the cylinder body is provided with a water passing groove at the periphery of the pure water outlet pipe, the water passing groove is a first through hole, a water path converter is arranged between the mounting head and the cylinder body, the water path converter is sleeved outside the pure water outlet pipe and forms a second flow passage with the pipe wall of the pure water outlet pipe, the second flow channel is communicated with the filter material filling area through a water passing groove, the periphery of the water passing groove is provided with a sealing ring rib extending towards the mounting head, one end of the waterway converter far away from the mounting head is in sealing fit with the sealing ring rib, the outer wall of the waterway converter is in sealing fit with the inner wall of the mounting head, and a third flow channel is arranged in the waterway converter and is communicated with a second water passing gap.
Furthermore, the outer end part of the water guide pipe forms one of a raw water inlet or a concentrated water outlet and penetrates through the first through hole, a second sealing annular wall extending outwards in the axial direction is arranged on the periphery of the first through hole on the top wall of the barrel, a second flow channel is formed between the inner wall of the second sealing annular wall and the outer wall of the water guide pipe and communicated with the filter material filling area, a third water passing gap is formed between the outer wall of the second sealing annular wall and the inner wall of the mounting head, and the third water passing gap is communicated with the second water passing gap.
According to the invention, the reverse osmosis filter element and the post-purification unit are arranged in one filter element assembly, so that the number of filter elements in the reverse osmosis water purifier is reduced, the pipeline layout between the filter elements is correspondingly simplified, and meanwhile, the service life monitoring and reminding of the filter elements and the filter element replacement are also simplified. The reverse osmosis composite filter element assembly provided by the invention can completely filter impurities such as organic matters, colloid, bacteria, viruses and the like in raw water, particularly inorganic salt, heavy metal ions and the like, and also has the effects of absorbing peculiar smell, improving the taste of pure water and the like. The reverse osmosis composite filter element assemblies provided by the invention can be arranged in a reverse osmosis water purifier, and can also be arranged in series, so that raw water can be repeatedly filtered for many times, and the produced water is cleaner, or the reverse osmosis composite filter element assemblies provided by the invention can also be connected in parallel, so that the water production efficiency is improved. The reverse osmosis filter element structure adopts the standardized central tube and the reverse osmosis membrane structure wound on the central tube, so that a complex water path structure is not required to be arranged, and the product cost is well controlled.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a cross-sectional view of a reverse osmosis cartridge assembly according to an embodiment of the invention;
FIG. 2 is a partial cross-sectional view of a reverse osmosis cartridge assembly according to an embodiment of the invention;
FIG. 3 is a side view of the cartridge in accordance with one embodiment of the present invention;
FIG. 4 is a top view of the cartridge in accordance with one embodiment of the present invention;
FIG. 5 is a schematic view of a first flow divider plate according to one embodiment of the present invention;
FIG. 6 is a side view of an isolation mask body according to an embodiment of the present invention;
FIG. 7 is a top view of an isolation mask body according to an embodiment of the present invention;
FIG. 8 is an isometric view of an isolation mask body according to an embodiment of the present invention;
FIG. 9 is a schematic diagram of a water circuit switch according to an embodiment of the present invention;
FIG. 10 is a cross-sectional view of a water circuit switch according to an embodiment of the present invention;
FIG. 11 is a partial cross-sectional view of a reverse osmosis cartridge assembly according to an embodiment of the invention;
FIG. 12 is a schematic view of a hermetic end cap according to a second embodiment of the present invention;
FIG. 13 is a schematic view of a can cover according to a second embodiment of the present invention;
FIG. 14 is a partial cross-sectional view of a three reverse osmosis cartridge assembly according to an embodiment of the invention;
FIG. 15 is a schematic view of an isolation mask body according to a third embodiment of the present invention;
FIG. 16 is a schematic view of a cartridge according to a third embodiment of the present invention;
FIG. 17 is a partial cross-sectional view of a four reverse osmosis cartridge assembly according to an embodiment of the invention;
FIG. 18 is a cross-sectional view of a five reverse osmosis cartridge assembly according to an embodiment of the invention;
FIG. 19 is a partial cross-sectional view of a five reverse osmosis cartridge assembly according to an embodiment of the invention;
FIG. 20 is a schematic view of a flow splitter according to an embodiment of the present invention;
FIG. 21 is a partial schematic view of a flow divider in accordance with an embodiment of the present invention;
FIG. 22 is a schematic view of a cartridge in accordance with an embodiment of the present invention;
FIG. 23 is a cross-sectional view of a cartridge in accordance with a fifth embodiment of the present invention;
FIG. 24 is a top view of a cartridge according to a fifth embodiment of the present invention;
FIG. 25 is a schematic view of the top wall of the cartridge in accordance with an embodiment of the present invention;
FIG. 26 is a cross-sectional view of the top wall of the cartridge in accordance with the fifth embodiment of the present invention;
FIG. 27 is a partial cross-sectional view of a six reverse osmosis cartridge assembly according to an embodiment of the invention;
FIG. 28 is a schematic view of the top wall of the cartridge in a sixth embodiment of the invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1-10, a reverse osmosis composite filter element assembly comprises a mounting head 1, a housing 2 and a reverse osmosis filter element 3 positioned in the housing 2. Wherein, reverse osmosis filter core 3 includes center tube 31 and the winding reverse osmosis membrane 32 on center tube 31, form raw water guide layer and the communicating pure water guide layer with center tube 31 in the reverse osmosis membrane 32, in the process of making water, the raw water gets into raw water guide layer from the side of intaking of raw water guide layer, and flow along the runner wherein, in flow process, because the effect of front end pressure, form the pure water in pure water guide layer through reverse osmosis membrane 32 gradually, the pure water flows and is collected in center tube 31 along pure water guide layer, on the other hand, the water that flows out from the play water side of raw water guide layer then forms dense water.
A first water passing gap 21 is formed between the reverse osmosis filter element 3 and the shell 2, the mounting head 1 is positioned at the end part of the shell 2, and the mounting head 1 is provided with a raw water inlet 11, a pure water outlet 12 and a concentrated water outlet 13. According to the reverse osmosis composite filter element assembly, the three water inlets and the three water outlets are arranged at one end of the reverse osmosis composite filter element assembly, so that a user can conveniently disassemble and assemble the reverse osmosis composite filter element assembly, and water leakage risk points are reduced.
In the invention, the post-purification unit 4 is arranged between the reverse osmosis filter element 3 and the mounting head 1, the central tube 31 is communicated with the pure water outlet 12 through the post-purification unit 4, namely, the pure water enters the post-purification unit 4 after passing through the central tube 31 and then flows out from the pure water outlet 12 after being purified by the post-purification unit 4, namely, two stages of filter elements are compounded in one shell 2 to form a composite filter element, so that the number of the filter elements in the reverse osmosis water purifier is reduced, correspondingly, the pipeline layout between the filter elements is simplified, and meanwhile, the service life monitoring and reminding of the filter elements and the filter element replacement are also simplified. Specifically, an isolation cover body 5 covering the rear purification unit 4 is further arranged in the filter element assembly, a first flow passage 51 is formed between the isolation cover body 5 and the rear purification unit 4, and the raw water inlet 11 is communicated with one end, close to the mounting head 1, of the reverse osmosis filter element 3 through the first flow passage 51. This first flow channel 51 has great water cross sectional area, the rivers of being convenient for smoothly pass through, simultaneously, because rivers need change radial flow into from axial flow to the flow direction when getting into in the raw water guide layer from reverse osmosis filter core 3 near installation head 1 one end, the great water cross sectional area of crossing of first flow channel 51 makes the speed of rivers axial flow slower, be favorable to the rivers diversion and make the raw water change into radial flow more easily, and then the even reverse osmosis filter core 3 that floods is close to installation head 1 one end, make reverse osmosis filter core 3 obtain even utilization. It should be noted that, in this context, the axial direction refers to a direction parallel to the central axis of the reverse osmosis filter element, and the radial direction refers to a direction perpendicular to the central axis of the reverse osmosis filter element. It should be noted that a filter material may be placed in the first flow passage to form a pre-purification unit, for example, granular activated carbon, PP cotton, activated resin, etc. may be placed in the first flow passage. A second water passing gap 22 is formed between the isolation cover body 5 and the shell 2, the concentrated water outlet 13 is communicated with one end of the reverse osmosis filter element 3 far away from the mounting head 1 through the second water passing gap 22 and the first water passing gap 21, raw water flows out from one end of the reverse osmosis filter element 3 far away from the mounting head 1 after flowing through a raw water guide layer to form concentrated water, and the concentrated water sequentially flows through the first water passing gap 21 and the second water passing gap 22 and flows out of the filter element assembly from the concentrated water outlet 13.
It will be understood by those skilled in the art that the raw water inlet 11 and the concentrated water outlet 13 in the above embodiments can be reversed, that is, the raw water and the concentrated water flow in opposite directions, the raw water enters the filter element assembly and then enters the raw water guide layer from the end of the reverse osmosis filter element 3 away from the mounting head 1 along the second water passing gap 22 and the first water passing gap 21 in sequence, the concentrated water is formed at the end of the reverse osmosis filter element 3 close to the mounting head 1, the concentrated water flows out of the filter element assembly after passing through the first flow channel 51, and the flow direction of the pure water portion is unchanged.
In this embodiment, the post-purification unit 4 includes a cylinder 41 and a filter 42 located in the cylinder 41. The cylinder 41 includes a top wall 411 near one end of the mounting head 1, a bottom wall 412 far from one end of the mounting head 1, and a peripheral wall 413, and it is understood that the top wall and the bottom wall are only distinguished according to their relative positions, and the top wall 411 and the bottom wall 412 in the present embodiment are flat, but may be curved or have other shapes. The bottom wall 412 is provided with a second through hole 415 communicating with the center tube 31, a sealing wall 416 extending towards the center tube 31 is provided in the hole of the second through hole 415, the sealing wall 416 extends into the center tube 31 and forms a seal with the inner wall thereof, of course, the sealing may also be performed in other manners, for example, the center tube extends towards the mounting head and extends into the second through hole, and the outer wall of the center tube forms a seal with the hole edge of the second through hole.
It is worth mentioning that, in the scheme that has set up the isolation cover body, first flow channel has other formation modes in addition, for example, set up the isolation cover body to the double-deck isolation cover body, form first flow channel between them, and the isolation cover body of inboard then can lean on the cooperation with the barrel outer wall for have better isolation effect between the water route runner, avoid sealed the inefficacy to take place to cross water.
The inner side of the peripheral wall of the isolation cover body 5 is provided with a positioning boss 52, and the positioning boss 52 is abutted and positioned with one end of the reverse osmosis filter element 3 close to the mounting head 1, so that the isolation cover body 5 can be conveniently confirmed to be mounted in place. The peripheral wall of the isolation cover body 5 is also provided with an installation ring rib 53 extending back to the installation head 1, the installation ring rib 53 is wrapped outside the side wall of the reverse osmosis filter element 3 close to one end of the installation head 1 and is in sealing fit with the end part of the reverse osmosis filter element 3, generally, a sealing adhesive tape can be wound outside the installation ring rib 53 to bond and fix the installation ring rib and the reverse osmosis filter element, the first flow passage 51 and the second water passing gap 22 are effectively isolated, and the phenomenon that dense water and raw water are mixed with each other is avoided. In addition, a positioning bulge can be arranged on the outer side of the peripheral wall of the isolating cover body and abutted against the inner wall of the shell to prevent the sealing adhesive tape from being separated due to the fact that the isolating cover body is pressed, and the positioning bulge can be a rib extending along the axial direction to further improve the guiding effect on water flow in the second water passing gap.
The outer side of the bottom wall 412 of the cylinder 41 is provided with a first guide rib 431 extending along the radial direction, and the first guide rib 431 is abutted against the end part of the reverse osmosis filter element 3 close to the mounting head 1, so that on one hand, the flow of water is guided along the radial direction, and on the other hand, the axial mounting and positioning of the cylinder 41 are facilitated. The second guiding rib 432 extending along the axial direction is arranged outside the circumferential wall 413 of the cylinder 41, which is beneficial to guiding water flow to flow along the axial direction in the first flow channel 51, and preferably, the second guiding rib 432 can abut against the inner wall of the isolation cover body 5, so that the relative position of the cylinder 4 and the isolation cover body 5 can be conveniently positioned, and certainly, a third guiding rib extending along the axial direction can be arranged inside the circumferential wall of the isolation cover body. In this embodiment, the inner side of the top wall of the isolation cover body 5 is provided with a fourth guide rib 434 extending along the radial direction, the fourth guide rib 434 abuts against the outer side of the top wall of the cylinder body 4, water flow is guided to flow along the radial direction, meanwhile, the isolation cover body 5 and the cylinder body 4 are positioned and installed, or a fifth guide rib extending along the radial direction can be arranged on the outer side of the top wall of the cylinder body, and the fifth guide rib abuts against the inner wall of the isolation cover body.
In this embodiment, filter media 42 is granular activated carbon, and the pure water passes through granular activated carbon along the axial, and rearmounted purification unit 4 has undertaken the function of rearmounted activated carbon filter core in traditional reverse osmosis water purification machine promptly, in addition, can optimize the route and the contact time when pure water passes through rearmounted purification unit 4 through the axial dimension of adjusting rearmounted purification unit 4 for it is long to reach better purifying effect. The first flow distribution plate 44 is disposed on the bottom wall of the cylinder 41, the first flow distribution plate 44 is provided with a plurality of water passing holes 441, preferably, the water passing holes 441 are uniformly distributed on the first flow distribution plate 44, meanwhile, a first flow distribution gap 442 is formed between the first flow distribution plate 44 and the bottom wall 412 of the cylinder 41, and the second through holes 415 sequentially pass through the first flow distribution gap 442 and the water passing holes 441 on the first flow distribution plate 44 and are communicated with the granular activated carbon, so that the pure water can effectively flow and disperse along the first flow distribution gap 442 in the radial direction after passing through the second through holes 415, and then uniformly enters from the end of the granular activated carbon through the water passing holes 441, thereby preventing the granular activated carbon in a partial area from being not utilized, and improving the utilization rate of the granular activated carbon. Wherein, the inner side of the bottom wall 412 of the cylinder 41 is provided with a raised rib 436, the rib 436 abuts against the first flow dividing plate 44 to form a first flow dividing gap 442, and the rib 436 extends along the radial direction to facilitate guiding the water flow to be dispersed along the radial flow. In addition, the outer edge of the first splitter plate 44 may be attached to the inner wall of the cylinder 41, or a gap may be left between the outer edge and the inner wall to facilitate the flow of water. In order to prevent the granular activated carbon from leaking from water holes or other gaps, structures which can pass water, such as non-woven fabrics or nylon nets, can be arranged at corresponding positions. It will be appreciated that the first diversion gap may also be formed by other means, such as: ribs or protrusions are arranged on one side, facing the bottom of the cylinder, of the first flow dividing plate, so that a first flow dividing gap is supported; or, a bulge or a step structure is arranged on the inner wall of the cylinder, and the outer edge of the first flow dividing plate is erected on the bulge or the step structure so as to support the first flow dividing gap. Similarly, in order to avoid uneven utilization rate of the end, close to the mounting head, of the granular activated carbon, a second flow dividing plate can be arranged on the top wall of the cylinder body, a plurality of water passing holes are formed in the second flow dividing plate, a second flow dividing gap is formed between the second flow dividing plate and the bottom wall of the cylinder body, and the granular activated carbon is communicated with the first through hole sequentially through the water passing holes in the second flow dividing plate and the second flow dividing gap.
One end of the isolation cover body 5 close to the mounting head 1 is provided with a pure water through hole 54 communicated with the pure water outlet 12, the periphery of the pure water through hole 54 is provided with a water passing groove 55, and the water passing groove 55 is communicated with the first flow passage 51 and the raw water inlet 11. Specifically, the isolation cover body 5 is close to installation head 1 one end and is equipped with outside pure water outlet pipe 56 that extends, the outer tip of pure water outlet pipe 56 constitutes pure water delivery port 12, pure water through-hole 54 is located pure water outlet pipe 56, it is located the periphery of pure water outlet pipe 56 to cross basin 55, it is fixed with pure water outlet pipe 56 through splice bar 551 to cross the outer edge of water basin 55, and then make pure water outlet pipe 56 and the isolation cover body 5 form an organic whole, be convenient for holistic reliable assembly, of course, pure water outlet pipe and the isolation cover body also can be the components of dividing, the pure water outlet pipe is through with the isolation cover body, the cooperation of leaning on of parts such as barrel realizes fixed mounting. The top wall 411 of the cylinder 41 is provided with a first through hole 414 communicated with the pure water outlet 12, the hole edge of the first through hole 414 is provided with a sealing wall 417 extending towards the mounting head 1, and the sealing wall 417 is inserted into the pure water outlet pipe 56 to form sealing fit.
In this embodiment, a waterway converter 6 is disposed between the mounting head 1 and the isolation cover body 5, the waterway converter 6 is sleeved outside the pure water outlet pipe 56 and forms a second flow channel 62 with a pipe wall of the pure water outlet pipe 56, the second flow channel 62 is communicated with the first flow channel 51 through the water channel 55, a sealing ring rib 552 extending toward the mounting head 1 is disposed on the periphery of the water channel 55, and one end of the waterway converter 6, which is far away from the mounting head 1, is in sealing fit with the sealing ring rib 552. Of course, the waterway converter may be integrally formed with the isolation cover. Preferably, the inner wall of the waterway converter 6 is provided with a sixth guide rib 64, the sixth guide rib 64 extends along the axial direction, and plays a role in guiding when being assembled with the pure water outlet pipe 56 and extending into the process, and has a certain guiding effect on water flow, on the other hand, the sixth guide rib 64 abuts against and is positioned with the outer wall of the pure water outlet pipe 56, generally, the sixth guide rib 64 is at least three. The mounting head 1 and the housing 2 are generally connected by spin-melting, and considering the rotation between the sixth guiding rib 64 and the outer wall of the pure water outlet pipe 56 during spin-melting, a gap of 0.2-1 mm can be preferably maintained between the sixth guiding rib and the outer wall, so as to avoid the mounting deviation between the sixth guiding rib and the outer wall. In order to avoid damage to the pure water outlet pipe 56 during the rotary melting process, the outer wall of the pure water outlet pipe 56 is provided with an anti-melting ring mounting groove 561, an anti-melting ring is arranged in the anti-melting ring mounting groove 561, an anti-melting ring rib 65 abutted against the anti-melting ring is arranged in the water path converter 6, the water path converter 6 is positioned through the anti-melting ring and the anti-melting ring rib 65 after being assembled, and due to the fact that the two parts are in continuous contact, the heat generated by relative movement of the two parts in the rotary melting process and the probability of damage to the parts are greatly reduced. Meanwhile, the anti-melting ring rib 65 is fixed in the waterway converter 6 through the sixth guide rib 64, and a gap 66 is formed between the anti-melting ring rib 65 and the inner wall of the waterway converter 6, and the gap 66 is a part of the second flow channel 62 for passing the raw water.
A third water passing gap 23 is arranged between the outer wall of the waterway converter 6 and the inner wall of the mounting head 1, and the third water passing gap 23 is communicated with the second water passing gap 22 so as to communicate the second water passing gap 22 with the concentrated water outlet 13. Or a third flow passage can be arranged in the waterway converter, the third flow passage is communicated with the second water passing gap, and the outer wall of the waterway converter is in sealing fit with the inner wall of the mounting head.
Based on the filter element assembly with the structure, in the water preparation process, raw water enters the filter element assembly from the raw water inlet 11, flows along the second flow passage 62 between the water path converter 6 and the pure water outlet pipe 56, enters the first flow passage 51 between the isolation cover body 5 and the cylinder body 41 through the water passing groove 55, and reaches the end part, close to the mounting head 1, of the reverse osmosis filter element 3 along the first flow passage 51. Then, the raw water enters the raw water guide layer and passes through the raw water guide layer along the axial direction, under the action of membrane forward pressure, part of the water enters the pure water guide layer through the reverse osmosis membrane 32 to form pure water, the pure water flows along the pure water guide layer and gradually enters the central tube 31, then flows along the central tube 31 and enters the first diversion gap 442 in the post-purification unit 4 through the second through hole 415, and under the action of the first diversion plate 44, the pure water uniformly contacts with the filter material 42 in the cylinder 41, passes through the filter material 42 along the axial direction, passes through the first through hole 414 and the pure water outlet pipe 56 in sequence, and finally flows out from the pure water outlet 12. Part of the raw water which does not pass through the reverse osmosis membrane 32 flows out from one end of the raw water guide layer far away from the mounting head 1 to form concentrated water, and the concentrated water passes through the first water passing gap 21, the second water passing gap 22 and the third water passing gap 23 in sequence and finally flows out from the concentrated water outlet 13.
As a second embodiment of the present invention, as shown in fig. 11 to 13, unlike the first embodiment, the filter medium 42a in the post-purification unit 4a in this embodiment is rod-shaped activated carbon, which may be compressed activated carbon or rod-shaped activated carbon formed by winding carbon fibers around a holder. Because the filter element group spare inner space is limited, under the certain condition of filter element group spare height, the axial height of rearmounted purification unit is big, then the axial height of reverse osmosis filter core has been little, and this is unfavorable for guaranteeing reverse osmosis filter core desalination. In the embodiment, the rod-shaped activated carbon has higher purification efficiency in unit volume, can be better matched with a large-flux reverse osmosis filter element, and has purification effect and service life.
Specifically, a central flow passage 421a is provided in the center of the rod-shaped activated carbon 42a, a gap flow passage 422a is formed between the side wall of the rod-shaped activated carbon 42a and the inner wall of the cylinder 41a, and water flows from the gap flow passage 422a through the rod-shaped activated carbon 42a into the central flow passage 421a, passes through the pure water outlet pipe 56a after the purification operation of the post-purification unit 4a, and flows out of the filter element module from the pure water outlet 12 a. Of course, axially extending ribs may also be provided on the inside of the sidewall of the cylinder 41a to guide the axial flow of water within the interstitial flow channel 422 a. The end of the rod-shaped activated carbon 42a far away from the mounting head 1a is provided with a sealing end cover 44a for sealing the end, meanwhile, the sealing end cover 44a seals the end of the central flow passage 421a far away from the mounting head 1a, the side of the sealing end cover 44a facing the rod-shaped activated carbon 42a is provided with a positioning convex rib 443a, and the positioning convex rib 443a extends into the central flow passage 421a and is abutted against the inner wall of the central flow passage 421a for positioning. The end cap 44a serves to fix the rod-shaped activated carbon 42a and to prevent pure water from directly entering the central flow passage 421a from the end of the rod-shaped activated carbon 42a, thereby impairing the purification effect. A third diversion gap 444a is formed between the sealing end cover 44a and the bottom wall of the cylinder, and the second through hole 415a is communicated with the gap flow channel 422a through the third diversion gap 444a, so that the water entering from the second through hole 415a enters the gap flow channel 422a, wherein the forming manner of the third diversion gap 444a may refer to the forming manner of the first diversion gap 442 in the first embodiment, and the details thereof are not repeated. The center flow path 421a communicates with the first through hole 414a near the mounting head 1a and is connected to the pure water outlet 12 a.
Further, the rod-shaped activated carbon 42a is hermetically fitted to the top wall 411a of the cylinder 41a at the end close to the mounting head 1 a. In this embodiment, the cylinder 41a includes a cylinder cover 411a, and the cylinder cover 411a constitutes a top wall of the cylinder 41 a. The outer edge of the cylinder cover 411a is provided with a positioning convex rib 418a, and the positioning convex rib 418a and the side wall of the rod-shaped activated carbon 42a abut against and limit.
Other structures in this embodiment, such as the isolation cover body, the water path converter, the first flow channel, the guiding rib, the reverse osmosis filter element, the central tube, and their corresponding coordination and mutual communication relation, can refer to the above-mentioned embodiments, and are not described herein again.
As a third embodiment of the present invention, as shown in fig. 14 to 16, a pure water outlet pipe 56b extending outward is provided at one end of the cylinder 41b near the mounting head 1b, and an outer end of the pure water outlet pipe 56b forms the pure water outlet 12 b. One end of the isolation cover body 5b close to the mounting head 1b is provided with a water passing through hole 57b, and the pure water outlet pipe 56b passes through the water passing through hole 57 b. A water passing groove 571b is formed between the outer wall of the pure water outlet pipe 56b and the hole edge of the water passing through hole, the water passing groove 571b is communicated with the first flow passage 51b and the raw water inlet 11b, wherein one of the hole edge of the water passing through hole or the outer wall of the pure water outlet pipe can be provided with a positioning rib extending in the radial direction for abutting against the other one of the hole edge of the water passing through hole or the outer wall of the pure water outlet pipe for positioning, and the assembly position of the cylinder and the isolation cover body is ensured.
A water path converter 6b is arranged between the mounting head 1b and the isolation cover body 5b, the water path converter 6b is sleeved outside the pure water outlet pipe 56b and forms a second flow channel 62b with the pipe wall of the pure water outlet pipe 56b, and the second flow channel 62b is communicated with the first flow channel 51b through a water tank 571 b. The periphery of the water passing groove 571b has a sealing ring rib 552b extending toward the mounting head 1b, and one end of the waterway switcher 6b far away from the mounting head 1b is in sealing fit with the sealing ring rib 552 b. Of course, the waterway converter may be integrally formed with the isolation cover.
Other structures in this embodiment, such as the isolation cover body, the first flow channel, the guiding rib, the reverse osmosis filter element, the central tube and their corresponding matching and mutual communicating relationship, the filter material in the cylinder and its waterway structure, etc. can refer to the above embodiments, and are not described herein again.
As shown in fig. 17, according to a fourth embodiment of the present invention, the isolation cover body 5c is a separate body, and includes an isolation cover body 58c and a filter element end cap 59 c. The shield body 58c is disposed outside the rear purge unit 4c with the first flow passage 51c formed therebetween. The filter element end cover 59c is fixed at the end part of the reverse osmosis filter element 3c close to the mounting head 1c to separate the raw water flow passage and the concentrated water flow passage at the two sides. The filter element end cap 59c has a mounting hole at the center thereof for mounting and fixing with the isolation cover body 58c, and the mounting hole is in sealing fit after assembly, and the hole of the second through hole 415c of the cylinder 41c has a pipeline extending away from the mounting head 1c, and the pipeline passes through the mounting hole to be in sealing fit with the center tube 31c, but of course, the center tube may also pass through the mounting hole to be in sealing fit with the second through hole. The cartridge end cap 59c in this embodiment has a top wall that forms a radially diverging gap for the feed water flow with the end of the reverse osmosis cartridge 3 c. It will be appreciated that the top of the filter element end cap may not have a top wall, but may be open, with the filter element end cap sealingly engaging the end of the isolation cup body adjacent the reverse osmosis filter element. Other structures in this embodiment can be used in reference to the above-described embodiment, and will not be further developed here.
As an embodiment five of the present invention, as shown in fig. 18 to 26, a reverse osmosis composite filter element assembly comprises a mounting head 1d, a housing 2d and a reverse osmosis filter element 3d positioned in the housing 2d, wherein a first water passing gap 21d is formed between the reverse osmosis filter element 3d and the housing. The mounting head 1d is located at the end of the housing 2d, and the mounting head 1d is provided with a raw water inlet 11d, a pure water outlet 12d and a concentrated water outlet 13 d. The reverse osmosis filter element 3d comprises a central tube 31d and a reverse osmosis membrane 32d wound on the central tube 31d, and a raw water guide layer and a pure water guide layer communicated with the central tube are formed in the reverse osmosis membrane. The reverse osmosis composite filter element assembly further comprises: and a post-purification unit 4d positioned between the reverse osmosis filter element 3d and the mounting head 1d, wherein the central tube 31d is communicated with the pure water outlet 12d through the post-purification unit 4 d. The raw water inlet 11d is communicated with one end of the reverse osmosis filter element 3d close to the mounting head 1d through a first flow passage 51d, specifically, a water conduit 5d is arranged inside the rear purification unit 4d, and a first flow passage 51d is formed inside the water conduit 5 d. A second water passing gap 22d is formed between the rear purification unit 4d and the shell 2d, and the concentrated water outlet 13d is communicated with one end of the reverse osmosis filter element 3d far away from the mounting head 1d through the second water passing gap 22d and the first water passing gap 21 d.
In the present invention, the post-purification unit 4d includes a cylinder 41d and a filter material located in the cylinder 41d, wherein a filter material filling region 42d is provided between an outer wall of the water conduit 5d and an inner wall of the cylinder 41 d. It is worth mentioning that the first flow channel has other forming manners, for example, the side wall of the cylinder body is thicker, and a channel for water to pass through is arranged in the side wall of the cylinder body, so that the internal structure of the filter element assembly of the embodiment is more compact, and more filter materials can be arranged in the limited internal space of the filter element assembly. The cylindrical body 41d includes a top wall 411d near an end of the mounting head 1d, a bottom wall 412d remote from the end of the mounting head 1d, and a peripheral wall 413d, and the second water passing gap 22d is located between the cylindrical body 4d and the housing 2 d. The top wall 411d of the cylinder is provided with a first through hole 414d communicating the filter filling region 42d and the pure water outlet 12 d. The post-purification unit 4d is provided with a first channel 71d and a second channel 72d which penetrate through the bottom wall 412d of the cylinder body, the first channel 71d is communicated with the central tube 31d and the filter material filling area 42d, and the second channel 72d is communicated with the water guide tube 5d and one end of the reverse osmosis filter element 3d close to the mounting head 1 d.
Wherein the first channel and the second channel can be through holes arranged on the bottom wall of the cylinder, preferably, a flow divider 7d is arranged in the post-purification unit 4d, and the first channel 71d and the second channel 72d are arranged in the flow divider 7 d. The bottom wall 412d of the cylinder 41d is provided with a second through hole 415d, and the side wall of the shunt 7d is in sealing fit with the hole edge of the second through hole 415 d. The shunt 7d is divided into a first section 731d close to the mounting head 1d and a second section 732d far from the mounting head 1d by a portion which is in sealing engagement with the second through hole 415 d. A first overflowing hole 741d is formed in the side wall of the first section 731d, a second overflowing hole 742d is formed in the end portion of the second section 732d, the first overflowing hole 741d communicates with the filter material filling region 42d, the second overflowing hole 742d communicates with the central tube 31d, and a first passage 71d is formed between the first overflowing hole 741d and the second overflowing hole 742 d. On the other hand, the side wall of the second section 732d is provided with a third overflowing hole 743d, the end of the first section 731d is provided with a fourth overflowing hole 744d, the third overflowing hole 743d communicates with the end of the reverse osmosis filter element 3d close to the mounting head 1d, the fourth overflowing hole 744d communicates with the water conduit 5d, and a second passage 72d is formed between the third overflowing hole 743d and the fourth overflowing hole 744 d. The first section 731d is provided with a first sealing portion 751d which is in sealing engagement with the wall of the water guide duct 5d between the fourth overflowing hole 744d and the first overflowing hole 741 d. The second section 732d is provided with a second sealing portion 752d that is in sealing engagement with the wall of the center tube 31d between the second overflowing hole 742d and the third overflowing hole 743 d. In general, the first sealing portion 751d and the second sealing portion 752d may be seal grooves formed in the side walls of the flow divider, and corresponding seal rings may be fitted in the seal grooves to form a seal by pressing the seal rings, and similarly, the third sealing portion 753d may be provided at a seal engagement portion between the flow divider 7d and the second through hole 415 d. In addition, the side wall of the flow divider 7d may be provided with a positioning rib 76d, and the positioning rib 76d is positioned with the end of the central tube 31d to facilitate confirmation of the installation of the components in place.
In this embodiment, the filter material is granular activated carbon, pure water passes through granular activated carbon along the axial direction, the first flow distribution plate 44d has been placed on the diapire 412d of the barrel 41d, be equipped with a plurality of water holes on the first flow distribution plate 44d, it is preferred, a plurality of water holes 441 evenly distribute on the first flow distribution plate 44, form first flow gap 442d between the diapire 412d of first flow distribution plate 44d and barrel, first passageway 71d loops through the water holes on first flow gap 442d and the first flow distribution plate 44d and communicates with granular activated carbon, make pure water can effectively radially flow along first flow gap 442d and disperse, then get into from the even tip of granular activated carbon in water hole, avoid the granular activated carbon of partial region to obtain unable the utilization, the utilization ratio of granular activated carbon has been improved. The inner side of the bottom wall 412d of the cylinder 41d is provided with a raised rib 436d, the rib 436d abuts against the first flow dividing plate 44d to form a first flow dividing gap 442d, and the rib 436d extends along the radial direction, which is favorable for guiding the water flow to flow and disperse in the radial direction. In addition, other forming manners of the first shunting gap may refer to the scheme in the first embodiment, and are not described herein again. Similarly, in order to avoid uneven utilization rate of the end, close to the mounting head, of the granular activated carbon, a second flow dividing plate can be arranged on the top wall of the cylinder body, a plurality of water passing holes are formed in the second flow dividing plate, a second flow dividing gap is formed between the second flow dividing plate and the bottom wall of the cylinder body, and the granular activated carbon is communicated with the first through hole sequentially through the water passing holes in the second flow dividing plate and the second flow dividing gap.
It is to be noted that, in addition to the filter filling scheme of the granular activated carbon, the rod-shaped activated carbon filter filling scheme as in the second embodiment described above may be employed. The center of the rod-shaped activated carbon is provided with a central flow passage, a gap flow passage is formed between the side wall of the rod-shaped activated carbon and the inner wall of the barrel, one end, far away from the mounting head, of the rod-shaped activated carbon is provided with a sealing end cover for sealing the end part, the sealing end cover seals one end, far away from the mounting head, of the central flow passage, a third shunting gap is formed between the sealing end cover and the bottom wall of the barrel, the first passage is communicated with the gap flow passage through the third shunting gap, and one end, close to the mounting head, of the central flow passage is communicated with the first through hole. The specific refinement structure can refer to the scheme in the second embodiment, and is not expanded here.
The first sealing annular wall 451d is arranged at one end of the cylinder body 41d close to the reverse osmosis filter element 3d, and the first sealing annular wall 451d is in sealing fit with the side wall of the reverse osmosis filter element 3d close to the mounting head 1d to isolate the raw water and the concentrated water at two sides. The inner wall of first seal rampart 451d is equipped with location step 452d, and location step 452d and reverse osmosis filter core 3d lean on the location near installation head 1d one end, and then form the overflowing clearance 46d that the water supply flow passes through between the diapire 412d of barrel and the end that reverse osmosis filter core 3d is close to installation head 1d, are favorable to rivers radial flow and even to be filled reverse osmosis filter core 3d and are close to installation head 1d one end for reverse osmosis filter core 3d obtains even utilization. Of course, the overflowing gap may also be formed in other manners, for example, a guide rib extending along the radial direction is disposed on the outer side of the bottom wall of the cylinder, the guide rib abuts against the end portion of the reverse osmosis filter element close to the mounting head, and then an overflowing gap for water to pass through is formed between the bottom wall of the cylinder and the end portion of the reverse osmosis filter element close to the mounting head. In addition, an axially extending guiding rib 419d may be disposed outside the peripheral wall 413d of the cylindrical body, so as to facilitate guiding the water flow in the second water passing gap 22d to pass through along the axial direction.
At the position of the mounting head 1d, the outer end of the water conduit 5d forms the raw water inlet 11d and passes through the first through hole 414d, the top wall 411d of the cylinder is provided with a second sealing ring wall 452d extending axially and outwardly at the periphery of the first through hole 414d, and a second flow passage 62d is formed between the inner wall of the second sealing ring wall 452d and the outer wall of the water conduit 5 d. The second flow channel 62d is communicated with the filter material filling area 42d, a third water passing gap 23d is formed between the outer wall of the second sealing annular wall 452d and the inner wall of the mounting head 1d, and the third water passing gap 23d is communicated with the second water passing gap 22 d. The inner side of the outer end portion of the second sealing ring wall 452d is provided with a guide rib 47d extending in the axial direction, the guide rib 47d plays a role in guiding in the process of being assembled with the water guide pipe 5d and extending into the water guide pipe, and has a certain guiding effect on water flow passing, on the other hand, the guide rib 47d abuts against and is positioned with the outer wall of the water guide pipe 5d, and generally, the number of the guide ribs 47d is at least three. In addition, the outer side of the outer end of the second sealing ring wall 452d is further provided with a sealing part 48d and a fixing part 49d for assembling and sealing with a mounting seat on the water purifier body.
Based on the filter element assembly with the above structure, in the water preparation process, the raw water enters the filter element assembly from the raw water inlet 11d, flows along the first flow passage 51d in the water conduit 5d, and enters the flow passage gap 46d between the bottom wall 412d of the cylinder and the end of the reverse osmosis filter element 3d close to the mounting head 1d through the second passage 72d in the flow divider 7 d. Then, the raw water enters the raw water guide layer and passes through the raw water guide layer along the axial direction, under the action of membrane forward pressure, part of the water enters the pure water guide layer through the reverse osmosis membrane 32d to form pure water, the pure water flows along the pure water guide layer and gradually enters the central tube 31d, then flows along the central tube 31d, enters the first flow dividing gap 442d in the post-purification unit 4d through the first channel 71d in the flow divider 7d, is uniformly contacted with the filter material in the filter material filling area 42d under the action of the first flow dividing plate 44d, passes through the filter material along the axial direction, passes through the gap between the first through hole 414d, the second seal ring wall 452d and the water guide pipe 5d in sequence, and finally flows out from the pure water outlet 12 d. Part of the raw water which does not pass through the reverse osmosis membrane 32d flows out from one end of the raw water guide layer far away from the mounting head 1d to form concentrated water, and the concentrated water passes through the first water passing gap 21d, the second water passing gap 22d and the third water passing gap 23d in sequence and finally flows out from the concentrated water outlet 13 d.
As a sixth embodiment of the present invention, as shown in fig. 27 and 28, the difference from the fifth embodiment is that the inlet/outlet water path at the end of the post-purification unit near the mounting head is different. Specifically, a pure water outlet pipe 56e extending outwards is arranged on the top wall 412e of the cylinder 41e, the outer end portion of the pure water outlet pipe 56e forms the raw water inlet 11e, and the pure water outlet pipe is communicated with the water guide pipe 5 e. A water passing groove 55e is formed in the top wall 411e of the cylinder body at the periphery of the pure water outlet pipe 56e, and the water passing groove 55e is a first through hole for communicating the filter material filling area 42e and the pure water outlet 12 e. A water path converter 6e is arranged between the mounting head 1e and the cylinder 41e, the water path converter 6e is sleeved outside the pure water outlet pipe 56e and forms a second flow channel 62e with the pipe wall of the pure water outlet pipe 56e, and the second flow channel 62e is communicated with the filter material filling area 42e through a water channel 55 e. The periphery of the water passing groove 55e has a sealing rib 552e extending toward the mounting head 1e, and one end of the waterway switcher 6e away from the mounting head 1e is fitted with the sealing rib 552 e. A third water passing gap 23e is formed between the outer wall of the water channel converter 6e and the inner wall of the mounting head 1e, and the third water passing gap 23e is communicated with the second water passing gap 22 e. Or a third flow passage communicated with the second water passing gap can be arranged in the waterway converter, and the outer wall of the waterway converter is in sealing fit with the inner wall of the mounting head. Other structures in this embodiment, such as the flow divider, the first flow channel, the guiding rib, the reverse osmosis filter element, the central tube and their corresponding matching and communicating relationship, and the filter material in the cylinder and its water path structure, etc., can refer to the above embodiments, and are not described herein again.
It should be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, which is defined by the appended claims.

Claims (9)

1. The utility model provides a compound filter element group spare of reverse osmosis, includes installation head, shell and the reverse osmosis filter core that is located the shell, first water clearance of crossing has between reverse osmosis filter core and the shell, the installation head is located the tip of shell, be equipped with raw water inlet, pure water delivery port and dense water delivery port on the installation head, reverse osmosis filter core includes the center tube and twines the reverse osmosis membrane on the center tube, form raw water guide layer in the reverse osmosis membrane and with the communicating pure water guide layer of center tube, its characterized in that includes:
the rear purification unit is positioned between the reverse osmosis filter element and the mounting head, the central pipe is communicated with the pure water outlet through the rear purification unit, the rear purification unit comprises a cylinder body and a filter material positioned in the cylinder body, a water guide pipe is arranged in the rear purification unit, a first flow channel is formed in the water guide pipe, a filter material filling area is arranged between the outer wall of the water guide pipe and the inner wall of the cylinder body, and a second through hole is formed in the bottom wall of the cylinder body;
the first flow passage is communicated with one of the raw water inlet or the concentrated water outlet and one end of the reverse osmosis filter element, which is close to the mounting head;
the other of the raw water inlet or the concentrated water outlet is communicated with one end of the reverse osmosis filter element, which is far away from the mounting head, through the second water passing gap and the first water passing gap;
the shunt, the lateral wall of shunt with the hole edge sealing fit of second through-hole, the shunt uses and divides into the first section that is close to the installation head and keeps away from the second section of installation head for the boundary with the sealing fit position of second through-hole, the lateral wall of first section is equipped with first overflowing hole, the tip of second section is equipped with the second and crosses the discharge orifice, first overflowing hole communicates with each other with filter media filling area, the second crosses the discharge orifice and communicates with each other with the center tube, and the lateral wall of second section is equipped with the third and crosses the discharge orifice, the tip of first section is equipped with the fourth and crosses the discharge orifice, the third crosses the discharge orifice and is close to installation head one end with reverse osmosis filter core and communicates with each other, the fourth cross the discharge orifice with the aqueduct communicates with each other.
2. The reverse osmosis composite filter element assembly of claim 1, wherein the barrel comprises a top wall proximate one end of the mounting head, a bottom wall distal the mounting head, and a perimeter wall, the second water passing gap being located between the barrel and the housing.
3. A reverse osmosis composite filter element assembly according to claim 2, wherein the top wall of the cylinder is provided with a first through hole for communicating the filter material filling area and the pure water outlet, the rear purification unit is provided with a first channel and a second channel which penetrate through the bottom wall of the cylinder, the first channel is communicated with the central pipe and the filter material filling area, and the second channel is communicated with the water guide pipe and one end of the reverse osmosis filter element close to the mounting head.
4. The reverse osmosis composite filter element assembly according to claim 3, wherein the first channel and the second channel are located in the flow divider, the first channel is located between the first overflowing hole and the second overflowing hole, the second channel is located between the third overflowing hole and the fourth overflowing hole, the first section is provided with a first sealing portion which is in sealing fit with the pipe wall of the water guide pipe between the fourth overflowing hole and the first overflowing hole, and the second section is provided with a second sealing portion which is in sealing fit with the pipe wall of the central pipe between the second overflowing hole and the third overflowing hole.
5. A reverse osmosis composite filter element assembly according to claim 3, wherein the filter material is granular activated carbon, pure water passes through the granular activated carbon along the axial direction, a first flow dividing plate is arranged on the bottom wall of the cylinder body, a plurality of water through holes are formed in the first flow dividing plate, a first flow dividing gap is formed between the first flow dividing plate and the bottom wall of the cylinder body, and the first channel is communicated with the granular activated carbon sequentially through the first flow dividing gap and the water through holes in the first flow dividing plate;
or, the filter media is granular activated carbon, and the granular activated carbon is passed through along the axial to the pure water, the second reposition of redundant personnel board has been placed on the roof of barrel, be equipped with a plurality of water holes of crossing on the second reposition of redundant personnel board, form the second reposition of redundant personnel clearance between the diapire of second reposition of redundant personnel board and barrel, granular activated carbon loops through water hole and the second reposition of redundant personnel clearance on the second reposition of redundant personnel board and communicates with each other with first through-hole.
6. A reverse osmosis composite filter element assembly according to claim 3, wherein the filter material is rod-shaped activated carbon, a central flow passage is formed in the center of the rod-shaped activated carbon, a gap flow passage is formed between the side wall of the rod-shaped activated carbon and the inner wall of the barrel, a sealing end cover for sealing the end part of the rod-shaped activated carbon is arranged at the end, away from the mounting head, of the rod-shaped activated carbon, the sealing end cover seals the end, away from the mounting head, of the central flow passage, a third shunting gap is formed between the sealing end cover and the bottom wall of the barrel, the first channel is communicated with the gap flow passage through the third shunting gap, and the end, close to the mounting head, of the central flow passage is communicated with the first through hole.
7. The reverse osmosis composite filter element assembly of claim 2, wherein the barrel is provided with a first sealing ring wall at one end close to the reverse osmosis filter element, and the first sealing ring wall is in sealing fit with the side wall of the reverse osmosis filter element at one end close to the mounting head.
8. The reverse osmosis composite filter element assembly according to claim 7, wherein the inner wall of the first sealing ring wall is provided with a positioning step, the positioning step and the reverse osmosis filter element are abutted and positioned at one end close to the mounting head, and then an overflowing gap for water to pass through is formed between the bottom wall of the barrel body and the end part of the reverse osmosis filter element close to the mounting head; or, the outer side of the bottom wall of the barrel body is provided with a guide rib extending along the radial direction, the guide rib is abutted against the end part of the reverse osmosis filter element close to the mounting head, and then an overflowing gap for water flow to pass through is formed between the bottom wall of the barrel body and the end part of the reverse osmosis filter element close to the mounting head.
9. The reverse osmosis composite filter element assembly according to claim 3, wherein the outer end of the water conduit forms one of a raw water inlet and a concentrated water outlet and passes through the first through hole, the top wall of the cylinder body is provided with a second sealing annular wall extending outwards in the axial direction at the periphery of the first through hole, a second flow channel is formed between the inner wall of the second sealing annular wall and the outer wall of the water conduit and is communicated with the filter material filling area, a third water passing gap is formed between the outer wall of the second sealing annular wall and the inner wall of the mounting head, and the third water passing gap is communicated with the second water passing gap.
CN201710983782.9A 2017-10-20 2017-10-20 Reverse osmosis composite filter element assembly Active CN109694138B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008100127A (en) * 2006-10-17 2008-05-01 Toyobo Co Ltd Fluid separation membrane element
CN103071334A (en) * 2013-01-30 2013-05-01 浙江沁园水处理科技有限公司 Composite filter element and adapter thereof
CN104338439A (en) * 2013-07-25 2015-02-11 珠海格力电器股份有限公司 Ro membrane filter core structure
CN105540902A (en) * 2016-03-08 2016-05-04 北京四季沐歌太阳能技术集团有限公司 Compact type RO (reverse osmosis) water purifier filter element
CN206156806U (en) * 2016-10-26 2017-05-10 佛山市美的清湖净水设备有限公司 Filter element and water purification equipment

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008100127A (en) * 2006-10-17 2008-05-01 Toyobo Co Ltd Fluid separation membrane element
CN103071334A (en) * 2013-01-30 2013-05-01 浙江沁园水处理科技有限公司 Composite filter element and adapter thereof
CN104338439A (en) * 2013-07-25 2015-02-11 珠海格力电器股份有限公司 Ro membrane filter core structure
CN105540902A (en) * 2016-03-08 2016-05-04 北京四季沐歌太阳能技术集团有限公司 Compact type RO (reverse osmosis) water purifier filter element
CN206156806U (en) * 2016-10-26 2017-05-10 佛山市美的清湖净水设备有限公司 Filter element and water purification equipment

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