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CN111185098B - A water purifier filter core central tube, a rolled membrane assembly and a composite filter core assembly - Google Patents

A water purifier filter core central tube, a rolled membrane assembly and a composite filter core assembly Download PDF

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Publication number
CN111185098B
CN111185098B CN202010103362.9A CN202010103362A CN111185098B CN 111185098 B CN111185098 B CN 111185098B CN 202010103362 A CN202010103362 A CN 202010103362A CN 111185098 B CN111185098 B CN 111185098B
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China
Prior art keywords
filter
central tube
columnar
columnar filter
rods
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Active
Application number
CN202010103362.9A
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Chinese (zh)
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CN111185098A (en
Inventor
李援开
盛先贺
张长春
高威
李友铃
申鸿海
孔艳
李见
钟小榛
李叶松
叶英东
董情
张梦轩
王映涵
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Publication of CN111185098A publication Critical patent/CN111185098A/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/10—Supported membranes; Membrane supports
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/10—Spiral-wound membrane modules
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2649—Filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/08—Flow guidance means within the module or 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

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

Abstract

The invention provides a water purifier filter element central tube, a coiled membrane assembly and a composite filter element assembly, wherein the water purifier filter element central tube comprises at least three columnar filter rods (1), the at least three columnar filter rods (1) are arranged in the same direction along the axis direction, the at least three columnar filter rods (1) are arranged along the circumferential direction, two adjacent columnar filter rods (1) are connected, and the columnar filter rods (1) are made of filter material materials capable of allowing fluid to pass through. The special-shaped central tube structure formed by combining a plurality of monomers can be formed, fluid can pass through the special-shaped central tube structure, the contact area between the central tube and the fluid can be effectively increased under the condition that the volume of the central tube is not increased, the filtering area of the central tube is effectively increased, the filtering effect is enhanced, and the volume of the filter element can be reduced under the condition that the filtering effect is the same.

Description

Water purifier filter core center tube, roll-type membrane module and composite filter element module
Technical Field
The invention belongs to the technical field of water purification, and particularly relates to a water purifier filter core central tube, a coiled membrane component and a composite filter core component.
Background
The core element of the reverse osmosis water purifier is a reverse osmosis membrane (ReverseOsmosismembrane, RO) filter element. The reverse osmosis filter core generally includes the center tube and twine in the peripheral reverse osmosis membrane group of center tube, traditional purifier center tube be tubular hollow structure, and this center tube of this center tube concave surface of locating the pipe wall of center tube of as disclosed in patent CN207091063U is equipped with the guiding gutter to with pure water hole intercommunication, increased the water inflow area of pure water hole on the center tube, thereby ensured the pure water volume through the pure water hole, and then guaranteed the play water velocity of center tube.
Because the composite filter element of the water purifier in the prior art has the technical problems of limited filtering area, poor filtering effect, larger filter element volume and the like when the filtering area is increased, the invention designs a central tube, a coiled membrane component and a composite filter element component of the water purifier.
Disclosure of Invention
Therefore, the invention aims to overcome the defect of limited filtering area of the composite filter element of the water purifier in the prior art, thereby providing a central tube, a coiled membrane component and a composite filter element component of the water purifier.
The invention provides a water purifier filter element central tube, which comprises:
At least three columnar filter sticks, at least three columnar filter sticks are arranged in the same direction along the axial direction, at least three columnar filter sticks are arranged along the circumferential direction, two adjacent columnar filter sticks are connected, and the columnar filter sticks are made of filter material capable of allowing fluid to pass through.
Preferably, the method comprises the steps of,
The filter material capable of allowing the fluid to pass through comprises at least one of a carbon material, a polypropylene pp material and a ceramic material.
Preferably, the method comprises the steps of,
The filter material capable of allowing the fluid to pass through is made of carbon, so that the columnar filter rod is a carbon rod, and/or the columnar filter rod is of a solid structure.
Preferably, the method comprises the steps of,
The columnar filter sticks are of a columnar structure, the central tube of the filter element of the water purifier comprises a central axis, and at least three columnar filter sticks are arranged around the central axis along the circumferential direction.
Preferably, the method comprises the steps of,
At least three columnar filter sticks are uniformly distributed and arranged around the central axis.
Preferably, the method comprises the steps of,
At least three columnar filter sticks are integrally formed to form an integral structure, or at least three columnar filter sticks are of a split structure, and two adjacent columnar filter sticks are sealed at the joint.
Preferably, the method comprises the steps of,
At least three columnar filter rods are integrally formed through injection molding or casting.
Preferably, the method comprises the steps of,
The outer surface of the columnar filter rod is formed into a structure with at least one groove, and/or the inner part of the columnar filter rod is provided with at least one hole structure.
Preferably, the method comprises the steps of,
The shape of the groove is strip-shaped or thread-shaped, and/or the outer surface of the columnar filter stick is provided with a plurality of grooves, and/or the interior of the columnar filter stick is provided with a plurality of hole structures to form a honeycomb structure.
The invention also provides a rolled membrane assembly, which comprises the central tube of the water purifier filter element, and further comprises a rolled membrane wound around the periphery of the central tube, wherein the rolled membrane can allow water to pass through and filter the water.
Preferably, the method comprises the steps of,
The radial inner side of the central tube is also provided with a supporting sleeve with a cylindrical structure, the inner side of the inner wall of the supporting sleeve is provided with a cavity, and the supporting sleeve is also provided with at least one water through hole.
The invention also provides a central tube of the filter element of the water purifier, which comprises the coiled membrane assembly.
The water purifier filter element central tube, the coiled membrane component and the composite filter element component provided by the invention have the following beneficial effects:
According to the invention, the central tube of the filter element is arranged in a structural form comprising at least three columnar filter rods, the columnar filter rods are arranged along the circumferential direction and are mutually connected, the columnar filter rods are made of filter material materials capable of allowing fluid to pass through, a special-shaped central tube structure formed by combining a plurality of monomers can be formed, and the fluid can pass through the special-shaped central tube, so that the contact area between the central tube and the fluid can be effectively increased under the condition that the volume of the central tube is not increased, the filtering area of the central tube is effectively increased, the filtering effect is enhanced, and the volume of the filter element can be reduced under the condition that the filtering effect is the same.
Drawings
FIG. 1 is a schematic diagram of a central tube of a water purifier filter element according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a second embodiment of a central tube of a water purifier filter element according to the present invention;
FIG. 3 is a schematic diagram of a third embodiment of a central tube of a water purifier filter element according to the present invention;
FIG. 4 is a schematic view of an embodiment of a rolled membrane module according to the invention;
FIG. 5 is a schematic diagram of a second embodiment of a rolled membrane module according to the invention;
FIG. 6 is a schematic view of a third embodiment of a net wound membrane module of the invention;
FIG. 7 is a schematic illustration of a fourth embodiment of a net wound membrane module of the invention;
fig. 8 is a schematic view of the internal structure of the composite filter element assembly of the present invention.
The reference numerals in the drawings are as follows:
10. central tube, cylindrical filter stick, central axis, recess, hole structure, coiled film, supporting sleeve, and cavity.
Detailed Description
As shown in fig. 1 to 8, the present invention provides a water purifier cartridge center tube, comprising:
at least three columnar filter rods 1, at least three columnar filter rods 1 are arranged in the same direction along the axial direction, at least three columnar filter rods 1 are arranged along the circumferential direction, two adjacent columnar filter rods 1 are arranged in a connected mode, and the columnar filter rods 1 are made of filter material capable of allowing fluid to pass through.
According to the invention, the central tube of the filter element is arranged in a structural form comprising at least three columnar filter rods, the columnar filter rods are arranged along the circumferential direction and are mutually connected, the columnar filter rods are made of filter material materials capable of allowing fluid to pass through, a special-shaped central tube structure formed by combining a plurality of monomers can be formed, and the fluid can pass through the special-shaped central tube, so that the contact area between the central tube and the fluid can be effectively increased under the condition that the volume of the central tube is not increased, the filtering area of the central tube is effectively increased, the filtering effect is enhanced, and the volume of the filter element can be reduced under the condition that the filtering effect is the same.
Preferably, the method comprises the steps of,
The filter material capable of allowing the fluid to pass through comprises at least one of a carbon material, a polypropylene pp material and a ceramic material. The filter material is a preferable material of the filter material, can realize the effective passing of water, can filter the water passing through the filter material, can realize the supporting function of the central tube, can form the first-stage filtering effect, overcomes the defect of volume increase caused by the increase of the number of stages of the filter element, reduces the volume and saves the cost.
Preferably, the method comprises the steps of,
The filter material capable of allowing the fluid to pass through is made of carbon, so that the columnar filter rod 1 is a carbon rod, and/or the columnar filter rod 1 is of a solid structure. The carbon capable of improving the taste is preferably used as the central tube material of the coiled membrane element, the plastic part central tube used by the traditional coiled membrane can be abandoned, the use of the plastic part central tube of the traditional coiled membrane element is avoided, one membrane element can realize the two-stage filtering function, the taste filter element can be avoided to be reused subsequently by using the carbonaceous central tube, the membrane element integrates the two-stage filtering functions of the fine filter element and the rear taste filter element, the carbonaceous central tube has no macroscopic macropores, structural micropores are distributed on the surface of the carbonaceous central tube, and compared with the central tube with the macroscopic macropores of the traditional plastic part, the coiled membrane produced water is easier to collect.
Preferably, the method comprises the steps of,
The columnar filter stick 1 is of a columnar structure, the central tube of the water purifier filter element comprises a central axis o, and at least three columnar filter sticks 1 are arranged along the circumferential direction around the central axis o. This is a preferred form of construction of the cylindrical filter rod of the present invention, which enables the formation of a cylindrical shape of the central tube, thereby increasing the filtering effect.
Preferably, the method comprises the steps of,
At least three columnar filter rods 1 are uniformly distributed around the central axis o. The filtering effect of the columnar filter stick can be enhanced.
Preferably, the method comprises the steps of,
At least three columnar filter sticks 1 are integrally formed to form an integral structure, or at least three columnar filter sticks 1 are of a split structure, and two adjacent columnar filter sticks 1 are sealed at the joint. The columnar filter stick is a preferable forming mode, an integral structure can be formed in an integral forming mode, the assembly precision is improved, the sealing performance is improved, the sealing effect can be improved, the filtering area is enhanced, and the filtering effect is improved through a split structure and sealing at the joint. A carbon rod central tube for a reverse osmosis filter element of a water purifier is formed by uniformly distributing and combining a plurality of (at least 3, such as 8 in the attached drawing, the actual number is selected according to the requirement) long and thin carbon rods along the same axis, or can be integrally formed, if the carbon rods are split, the intersecting positions of the two thin carbon rods need to be sealed to form a closed flow channel, the sealing mode can be but is not limited to sealant,
Preferably, the method comprises the steps of,
At least three of the cylindrical filter rods 1 are integrally formed by injection molding or casting. This is a preferred integral molding method of the columnar filter rod of the present invention, and improves molding efficiency.
Preferably, the method comprises the steps of,
The outer surface of the cylindrical filter rod 1 is formed into a structure with at least one groove 2, and/or the interior of the cylindrical filter rod 1 is provided with at least one hole structure 3. The filter rod is in a preferred structural form of the second and third embodiments, the second embodiment can increase the outer surface area of the columnar filter rod, so that the contact area between the columnar filter rod and fluid is effectively increased, and the filtering effect is increased, and the third embodiment can increase the basic area between the inner part of the columnar filter rod and the fluid, and the filtering effect is increased, as shown in fig. 3 and 6.
That is, in order to further increase the filtering area, a plurality of grooves can be further added on the outer surface of the fine carbon rod, and the shape of the grooves can be strip-shaped, thread-shaped or other shapes, so long as the area can be increased.
To further increase the filtration area, the fine carbon rod internal structure may be a honeycomb structure or other structure that can increase the area.
Preferably, the method comprises the steps of,
The grooves 2 are strip-shaped or thread-shaped, and/or the outer surface of the columnar filter rod 1 is provided with a plurality of the grooves 2, and/or the interior of the columnar filter rod 1 is provided with a plurality of the hole structures 3 to form a honeycomb structure. The grooves are in the preferred shape and the preferred structural form, the hole structures are in the preferred structural form, the contact area between the outer surface of the filter rod and the fluid can be further effectively increased by the grooves, the contact area between the inner part of the filter rod and the fluid can be further effectively increased by the hole structures, and therefore the filtering area is effectively increased, and the filtering effect is improved.
The invention also provides a rolled membrane assembly, which comprises the central tube of the water purifier filter element, and further comprises a rolled membrane 4 (reverse osmosis membrane, RO membrane) wound around the periphery of the central tube 10, wherein the rolled membrane 4 can allow water to pass through and filter the water. According to the invention, the central tube of the filter element is arranged in a structural form comprising at least three columnar filter rods, the columnar filter rods are arranged along the circumferential direction and are mutually connected, the columnar filter rods are made of filter material materials capable of allowing fluid to pass through, a special-shaped central tube structure formed by combining a plurality of monomers can be formed, and the fluid can pass through the special-shaped central tube, so that the contact area between the central tube and the fluid can be effectively increased under the condition that the volume of the central tube is not increased, the filtering area of the central tube is effectively increased, the filtering effect is enhanced, and the volume of the filter element can be reduced under the condition that the filtering effect is the same.
Preferably, the method comprises the steps of,
The radial inner side of the central tube 10 is also provided with a supporting sleeve 5 with a cylindrical structure, the inner side of the inner wall of the supporting sleeve 5 is provided with a cavity 51, and the supporting sleeve 5 is also provided with at least one water through hole. The support sleeve is arranged on the radial inner side of the inner wall of the central tube, so that the material with the filtering function can be supported (because the material has the filtering function and is usually insufficient in structural strength or insufficient in supporting strength), the firm fixing function of the central tube is improved, and conditions are provided for realizing the long-time filtering function. In order to strengthen the strength of the fine carbon rod, a supporting sleeve can be added at the center of the carbon rod, the supporting sleeve can be cylindrical, annular, fence-shaped or the like, through holes are formed in the outer surface of the supporting sleeve so that water can pass through, and the supporting sleeve can be made of high-hardness materials such as metal.
The invention also provides a composite filter element assembly comprising a rolled membrane assembly according to any one of the preceding claims.
The composite filter element comprises the carbon rod central tube, a pretreatment filter element, an RO filter element and a post-filtration filter element, wherein the pretreatment filter element can be a PP cotton and activated carbon filter element, the post-filtration filter element can be an ultrafiltration filter element, raw water is changed into purified water after passing through the pretreatment filter element, the purified water enters the RO filter element, the central tube of the RO filter element is the carbon rod central tube, the RO filter element plays a role in post-filtration, the water passing through the RO filter element is changed into pure water, and finally the pure water is output to a user terminal for use after post-ultrafiltration bacteriostasis.
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 (8)

1. A roll-to-roll membrane assembly, characterized by:
The water purifier comprises a water purifier filter core central tube, a coiled membrane (4) which is wound around the periphery of the central tube (10), wherein the coiled membrane (4) can allow water to pass through and filter the water;
the purifier filter core center tube includes:
At least three columnar filter rods (1), wherein the at least three columnar filter rods (1) are arranged in the same direction along the axial direction, the at least three columnar filter rods (1) are arranged along the circumferential direction, two adjacent columnar filter rods (1) are connected, and the columnar filter rods (1) are made of filter material capable of allowing fluid to pass through;
The radial inner side of the central tube (10) is also provided with a supporting sleeve (5) with a cylindrical structure, the inner side of the inner wall of the supporting sleeve (5) is provided with a cavity (51), and the supporting sleeve (5) is also provided with at least one water through hole;
The columnar filter sticks (1) are of a cylindrical structure, the central tube of the filter element of the water purifier comprises a central axis (o), and at least three columnar filter sticks (1) are arranged along the circumferential direction around the central axis (o);
at least three columnar filter sticks (1) are integrally formed to form an integral structure, or at least three columnar filter sticks (1) are of a split structure, and two adjacent columnar filter sticks (1) are sealed at the joint.
2. The roll film assembly of claim 1, wherein:
the filter material capable of allowing the fluid to pass through comprises at least one of a carbon material, a polypropylene pp material and a ceramic material.
3. The roll film assembly of claim 2, wherein:
the filter material capable of allowing the fluid to pass through is made of carbon, so that the columnar filter rod (1) is a carbon rod, and/or the columnar filter rod (1) is of a solid structure.
4. The roll film assembly of claim 1, wherein:
At least three columnar filter sticks (1) are uniformly distributed around the central axis (o).
5. The roll film assembly of claim 1, wherein:
at least three columnar filter rods (1) are integrally formed by injection molding or casting.
6. The roll film assembly of any one of claims 1-5, wherein:
The outer surface of the columnar filter rod (1) is formed into a structure with at least one groove (2), and/or the interior of the columnar filter rod (1) is provided with at least one hole structure (3).
7. The roll film assembly of claim 6, wherein:
the shape of the groove (2) is strip-shaped or thread-shaped, and/or the outer surface of the columnar filter rod (1) is provided with a plurality of grooves (2), and/or the interior of the columnar filter rod (1) is provided with a plurality of hole structures (3).
8. A composite filter element assembly comprising the rolled membrane module according to any one of claims 1 to 7.
CN202010103362.9A 2019-08-02 2020-02-19 A water purifier filter core central tube, a rolled membrane assembly and a composite filter core assembly Active CN111185098B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201910713454 2019-08-02
CN2019107134546 2019-08-02

Publications (2)

Publication Number Publication Date
CN111185098A CN111185098A (en) 2020-05-22
CN111185098B true CN111185098B (en) 2025-02-14

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Application Number Title Priority Date Filing Date
CN202010103369.0A Pending CN111229057A (en) 2019-08-02 2020-02-19 A composite filter element assembly and water purification system
CN202020187694.5U Active CN211886282U (en) 2019-08-02 2020-02-19 Spiral wound membrane module and water purification system
CN202020186724.0U Active CN211886280U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202010103364.8A Active CN111185099B (en) 2019-08-02 2020-02-19 Composite filter element assembly and water purification system
CN202010103163.8A Withdrawn CN111229055A (en) 2019-08-02 2020-02-19 A composite filter element assembly and water purification system
CN202010103362.9A Active CN111185098B (en) 2019-08-02 2020-02-19 A water purifier filter core central tube, a rolled membrane assembly and a composite filter core assembly
CN202020187695.XU Active CN211886283U (en) 2019-08-02 2020-02-19 Central tube for roll type membrane, roll type membrane component and water purification system
CN202020186746.7U Active CN211886281U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020191957.XU Active CN211886285U (en) 2019-08-02 2020-02-19 Spiral wound membrane module and water purification system
CN202010103186.9A Pending CN111229056A (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020191911.8U Active CN211886284U (en) 2019-08-02 2020-02-19 Purifier filter core center tube, spiral wound membrane module and compound filter core subassembly
CN202020186723.6U Active CN211886279U (en) 2019-08-02 2020-02-19 Roll up formula membrane module, compound filter element group spare and water purification system
CN202020186747.1U Active CN212091724U (en) 2019-08-02 2020-02-19 Water purification unit with filter element group spare
CN202010105792.4A Pending CN111185101A (en) 2019-08-02 2020-02-19 Water purification unit with filter element group spare
CN202010103366.7A Pending CN111185100A (en) 2019-08-02 2020-02-19 Central tube for roll type membrane, roll type membrane component and water purification system
CN202010103184.XA Pending CN111185096A (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020186722.1U Active CN211886278U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020186748.6U Active CN212091725U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020186721.7U Active CN211886277U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202010105862.6A Active CN112295417B (en) 2019-08-02 2020-02-19 A center pipe for roll-type membrane, roll-type membrane module and water purification system
CN202010103189.2A Pending CN111185097A (en) 2019-08-02 2020-02-19 Roll up formula membrane module, compound filter element group spare and water purification system
CN202020187693.0U Active CN212142159U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202010103151.5A Pending CN111229054A (en) 2019-08-02 2020-02-19 A composite filter element assembly and water purification system
CN202010105864.5A Pending CN111185102A (en) 2019-08-02 2020-02-19 Spiral wound membrane module and water purification system
CN202010105797.7A Pending CN111318175A (en) 2019-08-02 2020-02-19 Spiral wound membrane module and water purification system

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CN202010103369.0A Pending CN111229057A (en) 2019-08-02 2020-02-19 A composite filter element assembly and water purification system
CN202020187694.5U Active CN211886282U (en) 2019-08-02 2020-02-19 Spiral wound membrane module and water purification system
CN202020186724.0U Active CN211886280U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202010103364.8A Active CN111185099B (en) 2019-08-02 2020-02-19 Composite filter element assembly and water purification system
CN202010103163.8A Withdrawn CN111229055A (en) 2019-08-02 2020-02-19 A composite filter element assembly and water purification system

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CN202020187695.XU Active CN211886283U (en) 2019-08-02 2020-02-19 Central tube for roll type membrane, roll type membrane component and water purification system
CN202020186746.7U Active CN211886281U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020191957.XU Active CN211886285U (en) 2019-08-02 2020-02-19 Spiral wound membrane module and water purification system
CN202010103186.9A Pending CN111229056A (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020191911.8U Active CN211886284U (en) 2019-08-02 2020-02-19 Purifier filter core center tube, spiral wound membrane module and compound filter core subassembly
CN202020186723.6U Active CN211886279U (en) 2019-08-02 2020-02-19 Roll up formula membrane module, compound filter element group spare and water purification system
CN202020186747.1U Active CN212091724U (en) 2019-08-02 2020-02-19 Water purification unit with filter element group spare
CN202010105792.4A Pending CN111185101A (en) 2019-08-02 2020-02-19 Water purification unit with filter element group spare
CN202010103366.7A Pending CN111185100A (en) 2019-08-02 2020-02-19 Central tube for roll type membrane, roll type membrane component and water purification system
CN202010103184.XA Pending CN111185096A (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020186722.1U Active CN211886278U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020186748.6U Active CN212091725U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202020186721.7U Active CN211886277U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202010105862.6A Active CN112295417B (en) 2019-08-02 2020-02-19 A center pipe for roll-type membrane, roll-type membrane module and water purification system
CN202010103189.2A Pending CN111185097A (en) 2019-08-02 2020-02-19 Roll up formula membrane module, compound filter element group spare and water purification system
CN202020187693.0U Active CN212142159U (en) 2019-08-02 2020-02-19 Compound filter element group spare and water purification system
CN202010103151.5A Pending CN111229054A (en) 2019-08-02 2020-02-19 A composite filter element assembly and water purification system
CN202010105864.5A Pending CN111185102A (en) 2019-08-02 2020-02-19 Spiral wound membrane module and water purification system
CN202010105797.7A Pending CN111318175A (en) 2019-08-02 2020-02-19 Spiral wound membrane module and water purification system

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