CN110255743B - Composite filter element assembly and water purification system - Google Patents
Composite filter element assembly and water purification system Download PDFInfo
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- CN110255743B CN110255743B CN201910713435.3A CN201910713435A CN110255743B CN 110255743 B CN110255743 B CN 110255743B CN 201910713435 A CN201910713435 A CN 201910713435A CN 110255743 B CN110255743 B CN 110255743B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 175
- 239000002131 composite material Substances 0.000 title claims abstract description 64
- 238000000746 purification Methods 0.000 title claims abstract description 15
- 238000001914 filtration Methods 0.000 claims abstract description 34
- 239000012530 fluid Substances 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 49
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 10
- 229910052799 carbon Inorganic materials 0.000 claims description 10
- 239000012528 membrane Substances 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 239000000463 material Substances 0.000 claims description 6
- 238000000108 ultra-filtration Methods 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 5
- 238000001471 micro-filtration Methods 0.000 claims description 5
- 238000001728 nano-filtration Methods 0.000 claims description 5
- 239000012466 permeate Substances 0.000 claims description 5
- 238000001223 reverse osmosis Methods 0.000 claims description 5
- 239000012141 concentrate Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 21
- 238000013461 design Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 24
- 238000004519 manufacturing process Methods 0.000 description 10
- 229920000742 Cotton Polymers 0.000 description 7
- 239000012267 brine Substances 0.000 description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 4
- 239000000306 component Substances 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 2
- 230000005465 channeling Effects 0.000 description 2
- 229910052801 chlorine Inorganic materials 0.000 description 2
- 239000000460 chlorine Substances 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000012805 post-processing Methods 0.000 description 2
- 238000002203 pretreatment Methods 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
- C02F9/20—Portable or detachable small-scale multistage treatment devices, e.g. point of use or laboratory water purification systems
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
- C02F1/002—Processes for the treatment of water whereby the filtration technique is of importance using small portable filters for producing potable water, e.g. personal travel or emergency equipment, survival kits, combat gear
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/02—Non-contaminated water, e.g. for industrial water supply
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
- C02F2201/004—Seals, connections
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/16—Regeneration of sorbents, filters
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2307/00—Location of water treatment or water treatment device
- C02F2307/02—Location of water treatment or water treatment device as part of a bottle
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- Health & Medical Sciences (AREA)
- Clinical Laboratory Science (AREA)
- 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 provides a composite filter element component and a water purification system, wherein the composite filter element component comprises: the filter comprises a bottle body (604) and more than five stages of filter elements arranged in the bottle body (604), wherein the filter elements comprise a first stage pretreatment filter element (201), a second stage pretreatment filter element (202), a fine filter element (203), a first stage post-treatment filter element (204) and a second stage post-treatment filter element (205); the fluid is filtered by sequentially passing through the filter elements along the flowing direction of the fluid; the bottom or the top of the bottle body (604) is provided with a water inlet (701), and a pure water outlet (703) and a concentrated water outlet (702) are also arranged on the bottle body (604) and at the same side with the water inlet (701). The filter element integrates five-stage filtering functions, can improve the filtering effect, simultaneously can enable the volume of the filter element assembly and even the water purifier to be miniaturized, matches the service life of each filter element during design, and can solve the problem of frequent core replacement.
Description
Technical Field
The invention belongs to the technical field of water purification, and particularly relates to a composite filter element assembly and a water purification system.
Background
The core spare part of purifier is the filter core that plays filtering capability, and traditional purifier contains multistage filter core, and bottle quantity is many causes the complete machine volume to be partial big, and the filter core at every stage trades the core cycle inconsistent, increases to trade the core inconvenience. In recent years, the small size of the water purifier becomes an industry development trend, and more multistage composite filter cores are used on products. However, most of the existing composite filter elements are two-stage composite and three-stage composite, and compared with the traditional water purifier comprising a single-stage filter element, the volume of the existing composite filter element is obviously reduced. However, if the multi-stage filter element of the filter element composite water purifier can realize the purification effect, the volume of the water purifier is further reduced.
Because the water purifier in the prior art has the technical problems that the volume is large due to the fact that multistage filtration is additionally arranged for ensuring the filtration effect, and frequent core replacement is caused due to inconsistent core replacement period when each filter core is used independently, the invention designs a composite filter core component and a water purification system.
Disclosure of Invention
Therefore, the invention aims to overcome the defects that the water purifier in the prior art cannot ensure the better filtering effect and simultaneously can reduce the space volume, thereby providing the composite filter element assembly and the water purifying system.
The present invention provides a composite filter element assembly comprising:
the bottle body and the filter element with more than five stages arranged in the bottle body comprise a first-stage pretreatment filter element, a second-stage pretreatment filter element, a fine filter element, a first-stage post-treatment filter element and a second-stage post-treatment filter element; the fluid sequentially passes through the first-stage pretreatment filter element, the second-stage pretreatment filter element, the fine filtration filter element, the first-stage post-treatment filter element and the second-stage post-treatment filter element along the flowing direction of the fluid to be filtered; the bottom or the top of bottle is provided with the water inlet on the bottle and with the water inlet be located the position of same one side still be provided with pure water export and dense water export.
Preferably, the method comprises the steps of,
the material of the first-stage pretreatment filter element is PP; and/or, the second stage pretreatment cartridge (202) is a sintered carbon rod; and/or the fine filter element is a coiled reverse osmosis filter element or a coiled nanofiltration filter element; and/or the first stage post-treatment filter element is a sintered carbon rod; and/or the material of the second-stage post-treatment filter element is a microfiltration membrane and/or an ultrafiltration membrane.
Preferably, the method comprises the steps of,
the first-stage pretreatment filter element and the second-stage pretreatment filter element are positioned at the same height and are arranged inside and outside, and the first-stage pretreatment filter element is sleeved outside the second-stage pretreatment filter element.
Preferably, the method comprises the steps of,
the fine filter element is positioned below the first-stage pretreatment element or the second-stage pretreatment element, the first-stage post-treatment element is sleeved inside the fine filter element, and the second-stage post-treatment element is sleeved inside the fine filter element and below the first-stage post-treatment element.
Preferably, the method comprises the steps of,
the fine filter core is arranged in the fine filter core and is positioned outside the first-stage aftertreatment filter core and the second-stage aftertreatment filter core, a central pipe is further arranged outside the fine filter core, and a first guide groove is formed in the outer wall surface of the central pipe, so that fluid is led to permeate into the first guide groove through the fine filter core.
Preferably, the method comprises the steps of,
the inside of the central tube is provided with a sixth cavity, the first stage post-treatment filter element and the second stage post-treatment filter element are arranged in the sixth cavity, the first guide groove extends linearly or curvilinearly along the axis direction of the central tube, and the first guide groove is not communicated with the sixth cavity.
Preferably, the method comprises the steps of,
the upper end of the first guide groove is also communicated with a second guide groove, the second guide groove is arranged between the inner wall and the outer wall of the central tube, and the other end of the second guide groove is communicated with the upper end of the central tube so as to be communicated with the sixth cavity.
Preferably, the method comprises the steps of,
the interior of the first stage aftertreatment filter element has a seventh cavity, and fluid in the sixth cavity permeates into the seventh cavity through the first stage aftertreatment filter element.
Preferably, the method comprises the steps of,
the seventh cavity inside the first stage aftertreatment filter element is downwards communicated with the second stage aftertreatment filter element, the bottom end of the bottle body is provided with a pure water outlet, and the lower end of the second stage aftertreatment filter element is communicated with the pure water outlet.
Preferably, the method comprises the steps of,
the bottom end of the bottle body is also provided with a concentrated water outlet, and the lower end of the fine filter element can be communicated with the concentrated water outlet.
Preferably, the method comprises the steps of,
the top end of the bottle body is provided with a first connecting end cover so as to seal the upper end of the bottle body; and/or, the upper ends of the first-stage pretreatment filter element and the second-stage pretreatment filter element are also provided with a second connecting end cover, and the second connecting end cover is fixedly arranged on the bottle body; and/or, the bottom ends of the first-stage pretreatment filter element and the second-stage pretreatment filter element are also provided with a third connecting end cover, and the outer wall of the third connecting end cover is provided with a water channel formed by ribs;
when the center tube is also included:
and/or a fourth connecting end cover is arranged above the central tube, and a gap is formed between the upper end of the central tube and the fourth connecting end cover; and/or a fifth connecting end cover is arranged between the first-stage aftertreatment filter element and the second-stage aftertreatment filter element, and a channel allowing fluid to circulate is arranged in the middle of the fifth connecting end cover; and/or, a sixth connecting end cover is further arranged below the first-stage post-treatment filter element and the second-stage post-treatment filter element, and a water passing channel formed by ribs is formed on the outer wall of the sixth connecting end cover.
Preferably, the method comprises the steps of,
a first sealing piece is arranged between the top end of the first-stage aftertreatment filter element and the inner wall of the central tube; and/or the upper part of the fine filter element and the inner wall of the third connecting end cover are provided with second sealing pieces; and/or a third sealing piece is arranged between the lower part of the fine filter element and the sixth connecting end cover; and/or a fourth sealing piece is arranged between the lower outer peripheral wall of the first stage aftertreatment filter element and the inner peripheral wall of the central tube; and/or a second post-treatment bottle body is arranged between the second-stage post-treatment filter element and the central tube, and a fifth sealing piece is arranged on the outer wall of the lower end of the second post-treatment bottle body; and/or a sixth sealing element is arranged on the outer wall of the lower end of the sixth connecting end cover; and/or a seventh sealing piece is arranged between the lower part of the central tube and the pure water outlet of the bottle body.
Preferably, the method comprises the steps of,
a first cavity is formed between the bottom of the sixth connecting end cover and the bottle body; and/or a second cavity is formed between the periphery of the fine filter element and the bottle body; and/or a third cavity is formed between the periphery of the first-stage pretreatment filter element and the bottle body; and/or the interior of the second stage pretreatment filter element is provided with a fourth cavity extending in the vertical direction; and/or a fifth cavity is arranged between the third connecting end cover and the second sealing piece; and/or an eighth cavity is formed between the bottom end of the second-stage post-treatment filter element and the central tube; and/or a ninth cavity is formed between the bottom of the fine filter element and the sixth connecting end cover, and the ninth cavity is communicated with the concentrated water outlet; and/or a tenth cavity is formed between the outer peripheral wall of the bottom of the central tube and the sixth connecting end cover.
The invention also provides a water purification system comprising the composite filter element assembly according to any one of the preceding claims.
The composite filter element component and the water purification system provided by the invention have the following beneficial effects:
according to the invention, more than five stages of filter elements are arranged in the bottle body, fluid sequentially passes through the first stage pretreatment filter element, the second stage pretreatment filter element, the fine filtration filter element, the first stage post-treatment filter element and the second stage post-treatment filter element along the flowing direction of the fluid to be filtered, and the integrated composite filter element comprises five stages of filter elements which can be independently used on a water purifier to exert a purifying function, compared with the existing single-stage filter elements or two-stage, three-stage and even four-stage filter elements, the five-stage filter effect can be realized in one bottle body, the filter effect can be effectively improved, meanwhile, the filter element assembly and even the water purifier are miniaturized in volume, the filter element integrates the five-stage filter function, the service lives of the filter elements are matched in design, and the volume is considered, so that the integrated composite filter element has a large volume and only smaller volume than that when the filter element is independently used; all water inlets such as a water inlet, a pure water outlet and a concentrated water outlet are arranged at one end of the bottle body, so that the problem of large space occupation ratio caused by distribution at two ends of the interface can be effectively avoided;
And set up the filter core in through a bottle, it is integrative to effectively collect five-stage filtration function, the life-span of each filter core has been matchd in the design, compare in the life-span between the bottle of single-stage filter core or second grade, tertiary even four-stage filter core has the mismatching and leads to the inconsistent problem of core replacement cycle, bring the frequent problem of core replacement, the life of the inside filter core of bottle is unanimous basically when changing inside filter core, therefore the core replacement cycle is unanimous, the integrative core replacement, the frequent problem of core replacement that the core replacement cycle that exists when effectively avoiding each filter core to use alone brings.
Drawings
FIG. 1 is a schematic view of the three-dimensional internal structure (flow path direction) of the composite cartridge assembly of the present invention and the structure of the cartridge portion and center tube identified;
FIG. 2 is a schematic view of the three-dimensional interior structure of the composite filter element assembly of FIG. 1 with seal member portions and cavity portions identified;
FIG. 3 is a schematic view of a partial enlarged structure of a portion C in FIG. 2;
FIG. 4 is a schematic exterior structural view of the composite filter element assembly of the present invention;
fig. 5 is a schematic view of the bottom view of fig. 4 (see water inlet, pure water outlet and concentrated water outlet).
The reference numerals in the drawings are as follows:
10. a composite filter element; 200. a filter element; 201. a first stage pretreatment cartridge; 202. a second stage pretreatment cartridge; 203. a fine filtration cartridge; 204. a first stage post-treatment cartridge; 205. a second stage post-treatment cartridge; 301. a first seal; 302. a second seal; 303. a third seal; 304. a fourth seal; 305. a fifth seal; 306. a sixth seal; 307. a seventh seal; 401. a first connection end cap; 402. a second connecting end cap; 403. a third connecting end cap; 404. a fourth connecting end cap; 405. a fifth connecting end cap; 406. a sixth connecting end cap; 501. a first cavity; 502. a second cavity; 503. a third cavity; 504. a fourth cavity; 505. a fifth cavity; 506. a sixth cavity; 507. a seventh cavity; 508. an eighth cavity; 509. a ninth cavity; 510. a tenth cavity; 511. a slit; 602. a central tube; 603. a second post-treatment bottle body; 604. a bottle body; 701. a water inlet; 702. a concentrated water outlet; 703. a pure water outlet; A. a first guide groove; B. and a second guide groove.
Detailed Description
As shown in fig. 1-5, the present invention provides a composite filter element assembly comprising:
the bottle 604 and the filter elements with more than five stages are arranged in the bottle 604, and comprise a first stage pretreatment filter element 201, a second stage pretreatment filter element 202, a fine filter element 203, a first stage post-treatment filter element 204 and a second stage post-treatment filter element 205; fluid is filtered through the first stage pretreatment cartridge 201, the second stage pretreatment cartridge 202, the fine filtration cartridge 203, the first stage post-treatment cartridge 204, and the second stage post-treatment cartridge 205 in that order along the flow direction of the fluid; the bottom or the top of the bottle 604 is provided with a water inlet 701, and the same side of the bottle 604 as the water inlet 701 is also provided with a pure water outlet 703 and a concentrated water outlet 702.
According to the invention, more than five stages of filter elements are arranged in the bottle body, fluid sequentially passes through the first stage pretreatment filter element, the second stage pretreatment filter element, the fine filtration filter element, the first stage post-treatment filter element and the second stage post-treatment filter element along the flowing direction of the fluid to be filtered, and the integrated composite filter element comprises five stages of filter elements which can be independently used on a water purifier to exert a purifying function, compared with the existing single-stage filter elements or two-stage, three-stage and even four-stage filter elements, the five-stage filter effect can be realized in one bottle body, the filter effect can be effectively improved, meanwhile, the filter element assembly and even the water purifier are miniaturized in volume, the filter element integrates the five-stage filter function, the service lives of the filter elements are matched in design, and the volume is considered, so that the integrated composite filter element has a large volume and only smaller volume than that when the filter element is independently used;
And set up the filter core in through a bottle, it is integrative to effectively collect five-stage filtration function, the life-span of each filter core has been matchd in the design, compare in the life-span between the bottle of single-stage filter core or second grade, tertiary even four-stage filter core has the mismatching and leads to the inconsistent problem of core replacement cycle, bring the frequent problem of core replacement, the life of the inside filter core of bottle is unanimous basically when changing inside filter core, therefore the core replacement cycle is unanimous, the integrative core replacement, the frequent problem of core replacement that the core replacement cycle that exists when effectively avoiding each filter core to use alone brings.
And all water inlets such as a water inlet, a pure water outlet and a concentrated water outlet are arranged at one end of the bottle body, so that the problem of large space occupation ratio caused by distribution at two ends of the interface can be effectively avoided.
Preferably, the method comprises the steps of,
the material of the first stage pretreatment filter element 201 is PP cotton (preferably, PP cotton, paper folding PP cotton, etc.); and/or, the second stage pretreatment cartridge 202 is a sintered carbon rod; and/or, the fine filter element 203 is a roll-type reverse osmosis filter element or a roll-type nanofiltration filter element; and/or, the first stage aftertreatment filter element 204 is a sintered carbon rod; and/or, the material of the second stage post-treatment filter 205 is a microfiltration membrane and/or an ultrafiltration membrane.
The first-stage pretreatment filter element 201 can be spray-melted PP cotton or paper folding PP cotton, and has the main functions of performing first-stage filtration and removing pollutants such as large suspended matters, sediment, rust and the like in the water body; the second stage pretreatment filter element 202 can be a sintered carbon rod, and the function of the second stage pretreatment filter element is mainly to adsorb and remove residual chlorine, micromolecular organic matters and the like in the water body; the fine filter element 203 can be a coiled reverse osmosis filter element or a coiled nanofiltration filter element, and has the function of fine filtration, and can remove heavy metal ions, micromolecular organic matters and the like in the water body so as to realize the deep purification of the water body; the first stage post-treatment filter element 204 may be a sintered carbon rod that serves to improve the water-producing mouthfeel of the fine filter element 203; the second stage post-treatment filter 205 may be a micro-filtration membrane, an ultra-filtration membrane, etc., and is used for preventing the out-water microorganism from exceeding the standard and ensuring the sanitation and safety of the water.
Preferably, the method comprises the steps of,
the first-stage pretreatment filter element 201 and the second-stage pretreatment filter element 202 are located at the same height and are arranged inside and outside, and the first-stage pretreatment filter element 201 is sleeved outside the second-stage pretreatment filter element 202. Thus, the water flow enters the second-stage pretreatment filter element for treatment after the purification treatment of the first-stage pretreatment filter element outside, and the pretreatment or rough filtration before the fine filtration is realized.
Preferably, the method comprises the steps of,
the fine filter element 203 is located below the first stage pretreatment element 201 or the second stage pretreatment element 202, and the first stage post-treatment element 204 and the second stage post-treatment element 205 are both sleeved inside the fine filter element 203, and the second stage post-treatment element 205 is located below the first stage post-treatment element 204.
The layout form of the filter element structure is as follows: the first-stage pretreatment filter element 201 wraps or is nested on the outer surface of the filter element of the second-stage pretreatment filter element 202 to form an internal-external structural layout; the rear three-stage filter element and the front two-stage pretreatment filter element are in an up-down structural layout; the first-stage aftertreatment filter element 204 and the second-stage aftertreatment filter element 205 are filled in the central tube of the fine filter element 203; the structure layout can effectively omit an inner cylinder structure adopted in the prior art, the upper two-stage pretreatment filter element is fixedly arranged through the plurality of connecting end covers, the fixing arrangement of the fine filter element and the fixing arrangement of the two-stage aftertreatment filter element (comprising ultrafiltration) are realized through the arrangement of the plurality of connecting end covers and the central tube, the volume is effectively reduced, and the volume is miniaturized.
Preferably, the method comprises the steps of,
a central pipe 602 is further disposed inside the fine filter element 203 and outside the first stage aftertreatment element 204 and the second stage aftertreatment element 205, and a first guide groove a is disposed on an outer wall surface of the central pipe 602, so that fluid is led after penetrating into the first guide groove a through the fine filter element 203. Through the setting of center tube can realize the supporting role of center pin and can also collect the water of producing to back two-stage treatment filter core and meticulous filter core to can make meticulous water that filters the filter core and come can not directly get into the center tube inside through first guide way, but along first guide way direction at the center tube outer wall, further strengthened the further filterable length of meticulous filter core like this and increased the filter length of the inside two-stage aftertreatment filter core of center tube, further effectively improved the filter effect.
Preferably, the method comprises the steps of,
the center tube 602 has a sixth cavity 506 inside, the first stage aftertreatment filter element 204 and the second stage aftertreatment filter element 205 are disposed in the sixth cavity 506, the first guide groove a extends linearly or curvedly along the axial direction of the center tube 602, and the first guide groove a is not communicated with the sixth cavity 506. This is a preferred structural form of the center tube of the present invention, in which the first guide groove a extends in the axial direction without communicating with the sixth cavity, so that water coming from the fine filter element does not directly enter the inside of the center tube but is guided to the upper portion of the center tube along the first guide groove at the outer wall of the center tube, which effectively increases the further filtering length of the fine filter element and the filtering length of the two-stage post-treatment element inside the center tube, and maximizes the filtering length, further effectively improves the filtering effect.
Preferably, the method comprises the steps of,
the upper end of the first guide groove a is further communicated with a second guide groove B, the second guide groove B is located between the inner wall and the outer wall of the central tube 602, and the other end of the second guide groove B is communicated with the upper end of the central tube 602 to be communicated with the sixth cavity 506. Through set up the second guide way rather than leading out the sixth cavity at first guide way lower extreme and the second guide way that makes the second guide way be located between the inner and outer wall and upper end intercommunication center tube, can lead the water that first guide way comes to the upper portion of center tube through the second guide way and lead into the sixth cavity, rather than leading out the sixth cavity, further increase filtration length to prevent rivers leak outwards.
Preferably, the method comprises the steps of,
the first stage aftertreatment filter element 204 has a seventh cavity 507 within, and fluid in the sixth cavity 506 permeates through the first stage aftertreatment filter element 204 into the seventh cavity 507. Through setting up the seventh cavity in first order aftertreatment filter core inside for the water in the sixth cavity gets into the seventh cavity by filtration purification after getting into first aftertreatment filter core, provides clean water for getting into the second order aftertreatment filter core, makes the filter effect better.
Preferably, the method comprises the steps of,
the seventh cavity 507 inside the first stage aftertreatment filter element 204 is downward communicated with the second stage aftertreatment filter element 205, a pure water outlet 703 is arranged at the bottom end of the bottle 604, and the lower end of the second stage aftertreatment filter element 205 is communicated with the pure water outlet 703. And the water after passing through the fine filter element flows out through the first-stage and second-stage post-treatment filter elements and is discharged from the bottom end, so that pure water is obtained.
Preferably, the method comprises the steps of,
the bottom end of the bottle 604 is further provided with a concentrated water outlet 702, and the lower end of the fine filter element 203 can be communicated with the concentrated water outlet 702. The water filtered out from the fine filter element without passing through the latter two-stage filter element is discharged through the ninth cavity 509 and the concentrated water outlet to obtain concentrated water (high salt content, incapable of being cited).
Preferably, the method comprises the steps of,
the top end of the bottle 604 is provided with a first connecting end cover 401 to seal the upper end of the bottle 604; and/or, the upper ends of the first stage pretreatment filter element 201 and the second stage pretreatment filter element 202 are further provided with a second connection end cover 402, and the second connection end cover 402 is fixedly arranged on the bottle 604; and/or, the bottom ends of the first stage pretreatment filter element 201 and the second stage pretreatment filter element 202 are further provided with a third connection end cover 403, and the outer wall of the third connection end cover 403 is provided with a water channel formed by ribs to allow water to pass through (the ribs refer to a protruding strip structure formed by protruding outwards on the outer wall);
When the center tube 602 is also included:
and/or, a fourth connection end cover 404 is further disposed above the central tube 602, and a gap 511 is formed between the upper end of the central tube 602 and the fourth connection end cover 404; and/or, a fifth connection end cover 405 is further disposed between the first stage aftertreatment filter element 204 and the second stage aftertreatment filter element 205, and a channel allowing fluid to circulate is provided in the middle of the fifth connection end cover 405; and/or, a sixth connecting end cover 406 is further arranged below the first stage aftertreatment filter element 204 and the second stage aftertreatment filter element 205, and a water passing channel formed by ribs is formed on the outer wall of the sixth connecting end cover 406 so as to allow fluid to flow through.
The bottle body is characterized in that the bottle body is provided with a first connecting end cover, a second connecting end cover, a third connecting end cover, a fourth connecting end cover, a fifth connecting end cover and a sixth connecting end cover, wherein the first connecting end cover is used for supporting the first-stage post-treatment filter element, the second connecting end cover is used for supporting the second-stage post-treatment filter element, the third connecting end cover is used for supporting the lower ends of the first-stage pre-treatment filter element and the second-stage pre-treatment filter element, the fourth connecting end cover is used for supporting the upper end of the central pipe, the fifth connecting end cover is used for supporting the first-stage post-treatment filter element, and the sixth connecting end cover is used for supporting the second-stage post-treatment filter element.
In order to successfully manufacture the composite filter element, it is necessary to include an end cap portion. Specifically, the first connecting end cover 401 is a bottle body end cover, is connected with the bottle body in a spin-melting or screw thread mode, and is used for sealing the bottle body; a second connecting end cap 402, which is the upper end cap of the first and second stage pretreatment cartridges, acts as a fixation and seal; the third connecting end cover 403, specifically, the lower end cover of the first and second stage pretreatment filter element, is used for limiting and fixing the first and second stage filter element, and meanwhile, is connected with the fine filter element 203 to realize waterway intercommunication, and in addition, a limiting strip on the side wall of the end cover is used for providing a water channel function; a fourth connecting end cap 404, which is the upper end cap of the first stage aftertreatment cartridge, acts as a fixture; a fifth connecting end cap 405, which is a lower end cap of the first stage aftertreatment filter element, and can connect with the second stage aftertreatment filter element; the sixth connection end cap 406 is a lower end cap of the fine filter element, and is used for separating a water inlet waterway from a water channel of the fine filter element, and meanwhile, a limit strip is arranged on the end cap, so that the water passing channel is realized.
Preferably, the method comprises the steps of,
a first seal 301 is disposed between the top end of the first stage aftertreatment cartridge 204 and the inner wall of the base pipe 602; and/or the upper part of the fine filter cartridge 203 and the inner wall of the third connection end cap 403 are provided with a second seal member 302; and/or a third seal 303 is provided between the lower portion of the fine filter cartridge 203 and the sixth connecting end cap 406; and/or a fourth seal 304 is provided between the lower peripheral wall of the first stage aftertreatment cartridge 204 and the inner peripheral wall of the base pipe 602; and/or, a second post-treatment bottle body 603 is further arranged between the second stage post-treatment filter element 205 and the central pipe 602, and a fifth sealing piece 305 is further arranged on the outer wall of the lower end of the second post-treatment bottle body 603; and/or, a sixth sealing member 306 is disposed on the lower end peripheral wall of the sixth connecting end cap 406; and/or a seventh sealing member 307 is further provided between the lower side of the center pipe 602 and the pure water outlet 703 of the bottle 604.
The first sealing piece can be used for sealing the first stage post-treatment filter element and the central tube, so that the water flow is reduced; the second sealing piece is used for sealing the upper part of the fine filter element and the bottle body, so that water can only flow downwards from the fine filter element, and the water is fully subjected to fine filtration treatment; the third sealing piece is used for sealing the lower part of the fine filter element and the sixth connecting end cover, so that water from the fine filter element cannot flow out through the gap, but enters the first and second post-treatment filter elements through the diversion trench of the central tube to be filtered, and the filtering effect is improved; the sealing effect between the bottom end of the first post-treatment filter element and the central tube is realized through the fourth sealing piece, so that water from the first post-treatment filter element can only enter the second post-treatment filter element downwards from the seventh cavity, leakage is prevented, and the filtering effect is improved; the sealing effect between the second post-treatment filter element and the central tube is realized through the fifth sealing piece, so that water can only flow downwards from the middle part of the second post-treatment filter element, and the filtering effect is improved; the sealing effect between the sixth connecting end cover and the bottom end of the central tube can be ensured through the sixth sealing piece, so that water from the fine filter element cannot leak to the pure water outlet from the position between the sixth connecting end cover and the central tube; the seventh sealing member seals the pure water outlet.
In order to successfully manufacture the composite filter element, it is necessary to include a seal member portion. The first seal 301 is an O-ring against the water inlet end of the central tube and functions to seal the cavity of the central tube 602 in cooperation with the fourth connection end cap 404; the second sealing piece 302 and the third sealing piece 303 are brine sealing rings, and the brine sealing rings are used for separating a water inlet waterway from a waterway of the fine filter element; the fourth seal 304 is an O-ring on the fifth connection end cap 405; the fifth seal 305 is an O-ring on the second housing (i.e., the second post-processing vial 603) to achieve a seal; the sixth seal 306 is an O-ring on the center tube 602 that effects a seal; the seventh seal 307 is an O-ring on the sixth connection end cap 406. The sealing elements have the functions of preventing water channeling and realizing sealing.
Preferably, the method comprises the steps of,
a first cavity 501 is provided between the first connection end cap 401 and the second connection end cap 402; and/or, a second cavity 502 is formed between the second connection end cap 402 and the second seal member 302; and/or the interior of the second stage pretreatment cartridge 202 has a third cavity 503 extending vertically upward; and/or a fourth cavity 504 is provided between the second seal 302 and the fifth seal 305; and/or the gap between the bottom end of the center tube 602 and the fourth connection end cap 404 is a sixth cavity 506; and/or, an eighth cavity 508 is formed between the top end of the second stage aftertreatment cartridge 205 and the base pipe 602.
In order to successfully manufacture the composite filter element, it is necessary to include a cavity portion. The first cavity 501 is a raw water inlet cavity, and is formed by the water inlet, the sixth connecting end cover 406 and the bottle 604; the second cavity 502 is formed by a sixth connecting end cover 406, the fine filter element 203, a third connecting end cover 403, a second sealing piece 302, a third sealing piece 303 and a bottle 604, and is a raw water inlet cavity; the third cavity 503 is a raw water inlet cavity and is formed by the second connecting end cover 402, the third connecting end cover 403, the bottle 604, the first and second stage pretreatment filter elements. Wherein the first cavity 501, the second cavity 502 and the third cavity 503 are in communication. The fourth cavity 504 is a second pretreatment filter element cavity and is a filtered water outlet cavity; the fifth cavity 505 is in communication with the fourth cavity 504, which is a fine filter cartridge inlet cavity; the sixth cavity 506 is the water inlet cavity of the first stage aftertreatment filter element; the seventh cavity 507 is the water outlet cavity of the first stage post-treatment filter element; eighth cavity 508 is a second stage post-treatment cartridge treated water outflow cavity; the ninth cavity 509 is communicated with the tenth cavity 510 and is used for discharging concentrated water of the fine filter element.
The invention also provides a water purification system comprising the composite filter element assembly according to any one of the preceding claims. According to the invention, more than five stages of filter elements are arranged in the bottle body, fluid sequentially passes through the first stage pretreatment filter element, the second stage pretreatment filter element, the fine filtration filter element, the first stage post-treatment filter element and the second stage post-treatment filter element along the flowing direction of the fluid to be filtered, and the integrated composite filter element comprises five stages of filter elements which can be independently used on a water purifier to exert a purifying function, compared with the existing single-stage filter elements or two-stage, three-stage and even four-stage filter elements, the five-stage filter effect can be realized in one bottle body, the filter effect can be effectively improved, meanwhile, the filter element assembly and even the water purifier are miniaturized in volume, the filter element integrates the five-stage filter function, the service lives of the filter elements are matched in design, and the volume is considered, so that the integrated composite filter element has a large volume and only smaller volume than that when the filter element is independently used;
And set up the filter core in through a bottle, it is integrative to effectively collect five-stage filtration function, the life-span of each filter core has been matchd in the design, compare in the life-span between the bottle of single-stage filter core or second grade, tertiary even four-stage filter core has the mismatching and leads to the inconsistent problem of core replacement cycle, bring the frequent problem of core replacement, the life of the inside filter core of bottle is unanimous basically when changing inside filter core, therefore the core replacement cycle is unanimous, the integrative core replacement, the frequent problem of core replacement that the core replacement cycle that exists when effectively avoiding each filter core to use alone brings.
The composite filter element has the overall appearance shown in fig. 4, and the bottle body is provided with a handle, so that the composite filter element is convenient to take when the filter element is replaced. It is contemplated that the bottle body is only a structure matched with the composite filter element assembly, can realize water inlet and outlet functions and replacement functions, and is not limited to the appearance provided by the drawings.
The composite filter element of the invention has one end layout of water inlet, pure water and water concentration mouth. The composite filter element can replace the traditional multi-stage filter element, and the water purifying equipment can be prepared by using a single composite filter element. The filter element of the invention has an up-down and inner-outer structure and an up-down and inner-outer structure of the component which are matched to realize the integrated composite filter element.
The composite filter element structure comprises an upper structure, a lower structure and an inner structure and an outer structure. The upper structure and the lower structure are realized by separating by virtue of the end cover, but the upper space and the lower space are communicated spaces, the communicated channels are water diversion grooves formed in the side walls of the end covers, and the end covers are shared end covers of the pretreatment filter element and the fine filter element at the same time, so that the space is saved; the inner and outer structure of the filter element is characterized in that the inner and outer structure of the filter element is a central tube, the central tube is different from the traditional central tube, has large cavity characteristics, can be used for filling the filter element for post-treatment, and meanwhile, the central tube is provided with no water permeable holes, and the water diversion structure of the filter element is water diversion grooves uniformly distributed on the surface, so that the water yield can be increased and the water diversion can be led out. The water gap is distributed at one end and comprises a pressurized water inlet, a pure water outlet and a concentrated water outlet, the number of the interfaces is small, and the occupation of the longitudinal space caused by the distribution at the two ends of the interfaces can be effectively reduced. The system principle is water source-pump-pretreatment-fine filter element-post-treatment filter element, and the composite filter element can be applied to table-type water purifiers, water purifying and drinking machines and the like.
In order to achieve the above purpose, the present invention can be realized by the following technical scheme:
1) In order to successfully manufacture the composite filter element, it is necessary to include multiple stages of filter elements.
A first stage pretreatment cartridge 201, a second stage pretreatment cartridge 202, a fine filtration cartridge 203, a first stage post-treatment cartridge 204, and a second stage post-treatment cartridge 205. The first-stage pretreatment filter element can be spray-melt PP cotton or paper folding PP cotton, and has the main functions of performing first-stage filtration and removing pollutants such as large suspended matters, sediment, rust and the like in the water body; the second-stage pretreatment filter element can be a sintered carbon rod, and has the main functions of adsorbing and removing residual chlorine, micromolecular organic matters and the like in the water body; the fine filter element can be a coiled reverse osmosis filter element or a coiled nanofiltration filter element, has the function of fine filtration, can remove heavy metal ions, micromolecular organic matters and the like in water body, and realizes the deep purification of the water body; the first stage post-treatment filter element can be a sintered carbon rod, and the function of the first stage post-treatment filter element is to improve the water production taste of the fine filter element; the second stage post-treatment filter element can be a micro-filtration membrane, an ultrafiltration membrane and the like, and has the function of preventing the out-of-water microorganism from exceeding the standard and ensuring the sanitation and safety of water. Correspondingly, in order to successfully prepare the composite filter element, the layout form of the filter element structure is as follows: the first-stage pretreatment filter element 201 wraps or is nested on the outer surface of the filter element of the second-stage pretreatment filter element 202 to form an internal-external structural layout; the rear three-stage filter element and the front two-stage pretreatment filter element are in an up-down structural layout; the two-stage post-treatment filter element is filled in the fine filter element central tube.
2) In order to successfully manufacture the composite filter element, it is necessary to include an end cap portion.
In order to successfully manufacture the composite filter element, it is necessary to include an end cap portion. Specifically, the first connecting end cover 401 is a bottle body end cover, is connected with the bottle body in a spin-melting or screw thread mode, and is used for sealing the bottle body; a second connecting end cap 402, which is the upper end cap of the first and second stage pretreatment cartridges, acts as a fixation and seal; the third connecting end cover 403, specifically, the lower end cover of the first and second stage pretreatment filter element, is used for limiting and fixing the first and second stage filter element, and meanwhile, is connected with the fine filter element 203 to realize waterway intercommunication, and in addition, a limiting strip on the side wall of the end cover is used for providing a water channel function; a fourth connecting end cap 404, which is the upper end cap of the first stage aftertreatment cartridge, acts as a fixture; a fifth connecting end cap 405, which is a lower end cap of the first stage aftertreatment filter element, and can connect with the second stage aftertreatment filter element; the sixth connection end cap 406 is a lower end cap of the fine filter element, and is used for separating a water inlet waterway from a water channel of the fine filter element, and meanwhile, a limit strip is arranged on the end cap, so that the water passing channel is realized.
3) In order to successfully manufacture the composite filter element, it is necessary to include a seal member portion.
The first seal 301 is an O-ring against the water inlet end of the central tube and functions to seal the cavity of the central tube 602 in cooperation with the fourth connection end cap 404; the second sealing piece 302 and the third sealing piece 303 are brine sealing rings, and the brine sealing rings are used for separating a water inlet waterway from a waterway of the fine filter element; the fourth seal 304 is an O-ring on the fifth connection end cap 405; the fifth seal 305 is an O-ring on the second housing (i.e., the second post-processing vial 603) to achieve a seal; the sixth seal 306 is an O-ring on the center tube 602 that effects a seal; the seventh seal 307 is an O-ring on the sixth connection end cap 406. The sealing elements have the functions of preventing water channeling and realizing sealing.
4) In order to successfully manufacture the composite filter element, it is necessary to include a cavity portion.
The first cavity 501 is a raw water inlet cavity, and is formed by the water inlet, the sixth connecting end cover 406 and the bottle 604; the second cavity 502 is formed by a sixth connecting end cover 406, the fine filter element 203, a third connecting end cover 403, a second sealing piece 302, a third sealing piece 303 and a bottle 604, and is a raw water inlet cavity; the third cavity 503 is a raw water inlet cavity and is formed by the second connecting end cover 402, the third connecting end cover 403, the bottle 604, the first and second stage pretreatment filter elements. Wherein the first cavity 501, the second cavity 502 and the third cavity 503 are in communication. The fourth cavity 504 is a second pretreatment filter element cavity and is a filtered water outlet cavity; the fifth cavity 505 is in communication with the fourth cavity 504, which is a fine filter cartridge inlet cavity; the sixth cavity 506 is the water inlet cavity of the first stage aftertreatment filter element; the seventh cavity 507 is the water outlet cavity of the first stage post-treatment filter element; eighth cavity 508 is a second stage post-treatment cartridge treated water outflow cavity; the ninth cavity 509 is communicated with the tenth cavity 510 and is used for discharging concentrated water of the fine filter element.
5) In order to successfully manufacture the composite filter element, it is also necessary to include the components shown in fig. 1-2.
A bottle 604, which is an outer bottle of the entire composite filter element; the second bottle ((i.e., second post-treatment bottle 603)) is the outer bottle of the second post-treatment cartridge; the sealing rubber plug is used for sealing the filter element when the filter element is not in use. The central tube 602, unlike the conventional central tube with no through water diversion hole, has a water diversion groove on its surface, and the first guide groove a is formed on the surface of the central tube and is used for collecting the water produced by the fine filter element, and the second guide groove a is formed on the sidewall of the tail end of the central tube 602 and is used for guiding the water collected by the first guide groove a out and guiding the water produced to the sixth cavity 506 under the action of the fourth connecting end cover 404; in addition, the filter material can be placed in the space in the cavity of the central tube. The limiting device, the first limiting device and the third connecting end cover 403 are integrally manufactured and are used for realizing the positioning function on the fine filter element 203; the second stop is integrally formed with the center tube 602 and functions to position the second stage aftertreatment cartridge 205.
6) In order to successfully prepare the composite filter element, the composite filter element needs to comprise a water gap, and one end of the water gap is distributed.
The first water inlet is a raw water inlet 701, and the inlet water of the first water inlet sequentially passes through the first cavity 501, the second cavity 502 and the third cavity 503 and then enters the first-stage pretreatment filter element 201; the second water inlet is a pure water outlet 703, and the advanced water enters the pure water outlet 703 through the sixth cavity 506, the seventh cavity 507 and the eighth cavity 508 in sequence; the third water outlet is a concentrated water outlet 702, and the advanced water sequentially passes through the fourth cavity 504, the fifth cavity 505, the ninth cavity 509 and the tenth cavity 510 and then enters the concentrated water outlet 702.
7) The composite filter element has the overall appearance shown in fig. 4, and the bottle body is provided with a handle (not shown) for facilitating taking during core replacement. It is contemplated that the bottle body is only a structure matched with the composite filter element assembly, can realize water inlet and outlet functions and replacement functions, and is not limited to the appearance provided by the drawings.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (12)
1. A composite filter element assembly, characterized in that: comprising the following steps:
the filter comprises a bottle body (604) and more than five stages of filter elements arranged in the bottle body (604), wherein the filter elements comprise a first stage pretreatment filter element (201), a second stage pretreatment filter element (202), a fine filter element (203), a first stage post-treatment filter element (204) and a second stage post-treatment filter element (205); fluid is filtered by passing through the first stage pretreatment filter element (201), the second stage pretreatment filter element (202), the fine filtration filter element (203), the first stage post-treatment filter element (204) and the second stage post-treatment filter element (205) in this order along the flow direction of the fluid; a water inlet (701) is formed in the bottom or the top of the bottle body (604), and a pure water outlet (703) and a concentrated water outlet (702) are further formed in the bottle body (604) and positioned on the same side with the water inlet (701);
the first-stage pretreatment filter element (201) and the second-stage pretreatment filter element (202) are positioned at the same height and are arranged inside and outside, and the first-stage pretreatment filter element (201) is sleeved outside the second-stage pretreatment filter element (202);
the fine filter element (203) is located below the first-stage pretreatment element (201) or the second-stage pretreatment element (202), the first-stage post-treatment element (204) and the second-stage post-treatment element (205) are both sleeved inside the fine filter element (203), and the second-stage post-treatment element (205) is located below the first-stage post-treatment element (204).
2. A composite filter element assembly according to claim 1, wherein:
the first-stage pretreatment filter element (201) is made of PP; and/or, the second stage pretreatment cartridge (202) is a sintered carbon rod; and/or the fine filter element (203) is a roll-type reverse osmosis filter element or a roll-type nanofiltration filter element; and/or, the first stage post-treatment cartridge (204) is a sintered carbon rod; and/or the material of the second stage post-treatment filter element (205) is a microfiltration membrane and/or an ultrafiltration membrane.
3. A composite filter element assembly according to claim 1, wherein:
the fine filter element (203) is arranged inside the fine filter element (203) and outside the first-stage post-treatment filter element (204) and the second-stage post-treatment filter element (205), a central tube (602) is further arranged, a first guide groove (A) is formed in the outer wall surface of the central tube (602), and fluid is led to permeate into the first guide groove (A) through the fine filter element (203).
4. A composite filter element assembly according to claim 3, wherein:
the inside of the center tube (602) is provided with a sixth cavity (506), the first-stage aftertreatment filter element (204) and the second-stage aftertreatment filter element (205) are arranged in the sixth cavity (506), the first guide groove (A) extends linearly or curvedly along the axis direction of the center tube (602), and the first guide groove (A) is not communicated with the sixth cavity (506).
5. A composite filter element assembly according to claim 4, wherein:
the upper end of the first guide groove (A) is also communicated with a second guide groove (B), the second guide groove (B) is arranged between the inner wall and the outer wall of the central tube (602), and the other end of the second guide groove (B) is communicated with the upper end of the central tube (602) so as to be communicated with the sixth cavity (506).
6. A composite filter element assembly according to claim 4, wherein:
the first stage aftertreatment filter element (204) has a seventh cavity (507) inside, and fluid in the sixth cavity (506) permeates through the first stage aftertreatment filter element (204) into the seventh cavity (507).
7. A composite filter element assembly according to claim 6, wherein:
the seventh cavity (507) in the first stage aftertreatment filter element (204) is downwards communicated with the second stage aftertreatment filter element (205), the pure water outlet (703) is formed in the bottom end of the bottle body (604), and the lower end of the second stage aftertreatment filter element (205) is communicated with the pure water outlet (703).
8. A composite filter element assembly according to claim 1, wherein:
The bottom end of the bottle body (604) is also provided with the concentrated water outlet (702), and the lower end of the fine filter element (203) can be communicated with the concentrated water outlet (702).
9. A composite filter element assembly according to any one of claims 1-8, wherein:
the top end of the bottle body (604) is provided with a first connecting end cover (401) so as to seal the upper end of the bottle body (604); and/or, the upper ends of the first-stage pretreatment filter element (201) and the second-stage pretreatment filter element (202) are also provided with a second connecting end cover (402), and the second connecting end cover (402) is fixedly arranged on the bottle body (604); and/or, the bottom ends of the first-stage pretreatment filter element (201) and the second-stage pretreatment filter element (202) are also provided with a third connecting end cover (403), and the outer wall of the third connecting end cover (403) is provided with a water channel formed by ribs;
when further comprising a central tube (602):
and/or, a fourth connecting end cover (404) is further arranged above the central tube (602), and a gap is formed between the upper end of the central tube (602) and the fourth connecting end cover (404); and/or, a fifth connecting end cover (405) is further arranged between the first stage aftertreatment filter element (204) and the second stage aftertreatment filter element (205), and a channel allowing fluid to circulate is arranged in the middle of the fifth connecting end cover (405); and/or, a sixth connecting end cover (406) is further arranged below the first-stage aftertreatment filter element (204) and the second-stage aftertreatment filter element (205), and a water passing channel formed by ribs is formed on the outer wall of the sixth connecting end cover (406).
10. A composite filter element assembly according to claim 9, wherein:
a first sealing piece (301) is arranged between the top end of the first stage aftertreatment filter element (204) and the inner wall of the central tube (602); and/or the upper part of the fine filter element (203) and the inner wall of the third connecting end cover (403) are provided with a second sealing piece (302); and/or a third seal (303) is arranged between the lower part of the fine filter cartridge (203) and the sixth connecting end cap (406); and/or a fourth seal (304) is provided between the lower peripheral wall of the first stage aftertreatment cartridge (204) and the inner peripheral wall of the base pipe (602); and/or, a second post-treatment bottle body (603) is further arranged between the second-stage post-treatment filter element (205) and the central tube (602), and a fifth sealing piece (305) is further arranged on the outer wall of the lower end of the second post-treatment bottle body (603); and/or, a sixth sealing element (306) is arranged on the lower end peripheral wall of the sixth connecting end cover (406); and/or a seventh sealing piece (307) is arranged between the lower part of the central pipe (602) and the pure water outlet (703) of the bottle body (604).
11. A composite filter element assembly according to claim 10, wherein:
a first cavity (501) is formed between the bottom of the sixth connecting end cover (406) and the bottle body (604); and/or a second cavity (502) is arranged between the periphery of the fine filter element (203) and the bottle body (604); and/or a third cavity (503) is formed between the periphery of the first stage pretreatment filter element (201) and the bottle body (604); and/or, the interior of the second stage pretreatment cartridge (202) has a fourth cavity (504) extending in a vertical direction; and/or a fifth cavity (505) is provided between the third connection end cap (403) and the second seal (302); and/or, an eighth cavity (508) is formed between the bottom end of the second stage aftertreatment filter element (205) and the base pipe (602); and/or a ninth cavity (509) is formed between the bottom of the fine filtration cartridge (203) and the sixth connection end cap (406), and the ninth cavity (509) is in communication with the concentrate outlet (702); and/or a tenth cavity (510) is formed between the outer peripheral wall of the bottom of the center tube (602) and the sixth connection end cap (406).
12. A water purification system, characterized by: a composite filter element assembly comprising any one of claims 1-11.
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