WO2021164335A1 - 一种中心管、卷式膜组件、复合滤芯组件和净水系统 - Google Patents

一种中心管、卷式膜组件、复合滤芯组件和净水系统 Download PDF

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Publication number
WO2021164335A1
WO2021164335A1 PCT/CN2020/128100 CN2020128100W WO2021164335A1 WO 2021164335 A1 WO2021164335 A1 WO 2021164335A1 CN 2020128100 W CN2020128100 W CN 2020128100W WO 2021164335 A1 WO2021164335 A1 WO 2021164335A1
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WIPO (PCT)
Prior art keywords
filter element
central tube
cavity
wall
roll
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PCT/CN2020/128100
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English (en)
French (fr)
Inventor
李友铃
张量
申鸿海
柏长升
秦利利
张玉莹
董平安
李援开
Original Assignee
珠海格力电器股份有限公司
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Publication of WO2021164335A1 publication Critical patent/WO2021164335A1/zh

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    • 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

Definitions

  • the present disclosure belongs to the technical field of water purification, and specifically relates to a central tube, a roll-type membrane module, a composite filter element module, and a water purification system.
  • the roll membrane elements in the related art all need to be wound on a central tube made of plastic parts, and the central tube functions to support the roll membrane and collect the produced water.
  • the rear end of the film needs to be connected in series to improve the taste of the filter element, resulting in an increase in the number of filter elements, which is not conducive to the reduction of the volume of the whole machine.
  • the core component of the water purifier is the filter element that performs the filtering function, while the traditional water purifier contains multi-stage filter elements.
  • the large number of bottles causes the size of the whole machine to be too large, and the replacement cycle of all levels of filter elements is inconsistent, which increases the inconvenience of replacing the core. .
  • the small size of water purifiers has become an industry development trend, and more and more multi-stage composite filter elements are used in products.
  • most of the existing composite filter elements are two-stage composite and three-stage composite. Compared with the traditional water purifiers containing single-stage filter elements, the volume has been significantly reduced.
  • the multi-stage filter element of a filter element composite water purifier can be realized to play a purifying effect, the volume of the water purifier will have room for further reduction.
  • the central tube in the water purifier in the related technology functions to support the roll membrane and collect the produced water
  • the rear end needs to be connected in series to improve the taste of the filter element, which causes the number of filter elements to increase, which is not conducive to the reduction of the volume of the whole machine;
  • the machine also has technical problems such as adding multi-stage filtration to ensure the filtering effect, but resulting in larger volume, and the inconsistent core replacement cycle when each filter element is used alone, which leads to frequent core replacement. Therefore, the present disclosure researches and designs a central tube, Roll membrane module, composite filter element module and water purification system.
  • the purpose of the present disclosure is to provide a center tube, roll membrane module, composite filter element assembly, and water purification system in view of the above-mentioned drawbacks, so as to solve the related technology, the center tube of the water purifier has a single function, which leads to the need to improve filtration. The effect needs to increase the number of filter element stages, resulting in increased volume and other problems.
  • the present disclosure provides a central tube, wherein:
  • the central tube is a cylindrical structure, the cylindrical structure includes an inner wall and an outer wall, and a cavity located inside the inner wall, and the central tube is made of a filter material that can allow fluid to pass through to allow fluid to pass
  • the inner wall circulates to the outer wall, or circulates from the outer wall to the inner wall to reach the cavity.
  • the filter material that can allow fluid to pass through includes at least one of carbon material, polypropylene pp material, and ceramic material.
  • the center tube is a cylindrical carbon rod structure composed of the carbon material; or, the center tube is a cylindrical PP structure composed of the polypropylene pp material; or, the center The tube is a cylindrical ceramic tube composed of the ceramic material.
  • the present disclosure also provides a roll film module, which includes the central tube for roll film described in any one of the preceding items, and also includes a roll film wound around the outer circumference of the central tube, and the roll film Able to allow water to pass through and filter the water.
  • it further includes a first end cap disposed at one axial end of the central tube, and the first end cap can seal the axial end of the central tube; and/or,
  • It also includes a second end cover arranged at the other axial end of the central pipe, and a water outlet joint is also connected to the radial inner side of the second end cover to allow the water in the central pipe to escape from the water outlet. The joint flows out.
  • the first end cap includes a first extension arm located radially outside and extending in the axial direction, and a second extension arm located radially inside and extending in the axial direction.
  • the first extension A space capable of clamping the inner wall and outer wall of the central tube is formed between the arm and the second extension arm.
  • the second extension arm is fitted and clamped at the inner wall of the axial end of the central tube; the outer wall of the central tube is also formed with a first A step, the first extension arm is engaged with the first step, so that the outer peripheral surface of the first extension arm is flush with the outer peripheral surface of the central tube.
  • the center position of the first end cap is further formed with a film rolling groove for film rolling toward the axial direction of the center tube; and/or, the first end cap of the first end cap
  • An extension arm and the second extension arm are further provided with a first fixing rib extending in the axial direction.
  • the axial end of the central tube is also provided with a fixing groove recessed in the axial direction.
  • a fixing rib can form a clamping position with the fixing groove; and/or, the direction of the first end cover opposite to the direction of extension of the first extension arm and the second extension arm is also At least one first limiting rib is protrudingly provided.
  • the second end cap includes a third extension arm located radially outside and extending in the axial direction, and a fourth extension arm located radially inside and extending in the axial direction.
  • the third extension Between the arm and the fourth extension arm is formed a space capable of clamping the inner wall and the outer wall of the other end in the axial direction of the central tube.
  • the fourth extension arm is fitted and clamped at the inner wall of the other end of the central tube in the axial direction; and/or, the outer wall of the central tube is further in the axial direction.
  • a second step is also formed at one end, and the third extension arm is clamped at the outer peripheral wall of the second step so that the outer peripheral surface of the third extension arm is flush with the outer peripheral surface of the center tube together.
  • a second fixing rib and the shaft of the central tube are further provided extending in the axial direction.
  • the other end is also provided with a fixing groove recessed in the axial direction, and the second fixing rib can form a clamping limit with the fixing groove; and/or, the fourth end of the second end cover
  • the inner side of the extension arm is also provided with a second limiting rib protruding in the radial direction, and the second limiting rib can form a limiting and/or positioning between the second limiting rib and the water outlet joint.
  • the connecting part between the first end cap and the central tube is also connected by bonding; and/or, the connecting part between the second end cap and the central tube It is also connected by bonding; and/or, the roll film is wound around the axial end of the central tube and arranged at the outer periphery of the first end cap; and/or, the roll film is placed on the outer periphery of the first end cap; The other axial end of the central tube is wound around the outer circumference of the second end cap.
  • the roll film includes a roll film, a glue line, a water production screen and a water inlet screen, the roll film includes a separation layer and a non-separation layer, and the roll film The sheet is folded in half at the separation layer, the water inlet screen is placed in the folded position of the roll membrane, and one side of the non-separated layer is superimposed between the water production screen, and the The glue line is arranged on the inner peripheral side of the roll film and at a position opposite to the first end cover and/or the second end cover.
  • the present disclosure provides a composite filter element assembly, which includes:
  • the bottle body and the multi-stage filter element arranged inside the bottle body include a pretreatment filter element, a fine filter element, and a post-treatment filter element group;
  • the post-treatment filter element group includes a central tube made of a water-permeable filter material; It is filtered through the pretreatment filter element, the fine filter element, and the post-processing filter element group.
  • the multi-stage filter element is a filter element with five or more stages
  • the pre-treatment filter element includes a first-stage pre-treatment filter element and a second-stage pre-treatment filter element
  • the post-treatment filter element group further includes a post-treatment filter element; The fluid is filtered through the first-stage pretreatment filter element, the second-stage pretreatment filter element, the fine filter element, the central pipe and the post-treatment filter element in sequence.
  • the material of the first-stage pretreatment filter element is PP; and/or, the second-stage pretreatment filter element is a sintered carbon rod; and/or, the fine filter element is a roll-type reverse osmosis Filter element or roll-type nanofiltration filter element; and/or, the water-permeable filter material includes at least one of carbon material, polypropylene pp material and ceramic material; and/or, the material of the post-processing filter element is Microfiltration membrane and/or ultrafiltration membrane.
  • a cylindrical support sleeve is further provided on the radial inner side of the central tube, and at least one water through hole is also provided on the support sleeve.
  • the first-stage pretreatment filter element and the second-stage pretreatment filter element are located at the same height and arranged inside and outside, and the first-stage pretreatment filter element is sleeved on the second-stage pretreatment filter element Outside.
  • the fine filter element is located below the first-stage pretreatment filter element or the second-stage pretreatment filter element, and the central tube is sleeved inside the fine filter element, and the The post-processing filter element is sleeved inside the central tube.
  • the center tube has a sixth cavity inside, and the post-processing filter element is disposed in the sixth cavity.
  • the bottom end of the bottle body is provided with a pure water outlet, and the lower end of the post-processing filter element is in communication with the pure water outlet.
  • 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 communicate with the concentrated water outlet.
  • the top end of the bottle body is provided with a first connecting end cap to close the upper end of the bottle body; and/or, the first-stage pretreatment filter element and the second-stage pretreatment
  • the upper end of the filter element is further provided with a second connecting end cap, the second connecting end cap being fixedly arranged on the bottle body; and/or, the first-stage pretreatment filter element and the second-stage pretreatment filter element
  • the bottom end of the third connecting end cover is also provided with a water passage formed by ribs on the outer wall of the third connecting end cover;
  • the upper position of the central tube is further provided with a first end cover; and/or, the lower end of the post-processing filter element is further provided with a second end cover; and/or, the lower end of the fine filter element is also A sixth connecting end cover is provided, and the outer wall of the sixth connecting end cover is provided with a water passage formed by ribs.
  • the upper part of the fine filter element and the inner wall of the third connecting end cover are provided with a first seal; and/or, the lower part of the fine filter element and the sixth connecting end cover are different from each other.
  • a third sealing member is provided on the outer wall of the lower end of the sixth connecting end cover; and/or, the lower end of the central pipe is also provided with a water outlet joint, and the water outlet A fourth seal is also provided on the outer periphery of the lower end of the joint.
  • a first cavity is formed between the bottom of the sixth connecting end cap and the bottle body; and/or a second cavity is formed between the periphery of the fine filter element and the bottle body.
  • Cavity; and/or, a third cavity is formed between the outer periphery of the first-stage pretreatment filter element and the bottle body; and/or, the inside of the second-stage pretreatment filter element has a first Four cavities; and/or, a fifth cavity is formed between the third connecting end cover and the second sealing element; and/or, a fifth cavity is formed between the bottom end of the post-processing filter element and the center tube
  • a seventh cavity; and/or, an eighth cavity is formed between the bottom of the fine filter element and the sixth connecting end cover, between the inner wall of the lower end of the sixth connecting end cover and the outer wall of the lower end of the outlet connector
  • a ninth cavity is formed, and the upper end of the ninth cavity is in communication with the eighth cavity, and the lower end is in communication with the concentrated water outlet.
  • the present disclosure also provides a water purification system, which includes the roll-type membrane module described in any one of the preceding items or the composite filter element assembly described in any one of the preceding items.
  • the central pipe, the roll membrane module and the water purification system for the roll membrane provided by the present disclosure have the following beneficial effects:
  • the central tube of the roll membrane is made of a filter material that allows fluid to pass through, so that water can flow through the central tube made of the filter material, thereby forming a primary filtration effect on the water.
  • the central tube itself can form the role of primary filtration, which realizes the integration of the structural function of the central tube and makes it not only able to support the roll type Membrane and collected product water can also achieve filtration, which effectively reduces the increase in the volume of the filter element, which is conducive to the effective reduction of the volume of the whole machine;
  • the present disclosure can abandon the center tube of the plastic parts used in the roll membrane in the related technology, avoid the use of the center tube of the plastic parts in the roll membrane element in the related technology, and can realize that a membrane element has a two-stage filtration function; use a carbon center
  • the membrane element integrates the two-stage filtration function of the fine filter element and the post-position filter element; the carbon center tube has no macroscopic holes visible to the naked eye, and its surface is covered with structural micropores. Compared with traditional plastic parts with visible large holes in the central tube, the water produced by the roll diaphragm is easier to collect.
  • a five-stage or more filter element is arranged inside the bottle body, and the fluid passes through the first-stage pretreatment filter element, the second-stage pretreatment filter element, the fine filter element, and the filter element in sequence along the flow direction of the fluid.
  • the central tube and the post-processing filter element are filtered.
  • the integrated composite filter element contains a five-stage filter element, which can be used alone in a water purifier to perform its purification function.
  • five-stage filtration effect can be realized in one bottle body, which can effectively improve the filtration effect while miniaturizing the filter element assembly and even the water purifier.
  • the filter element integrates the five-stage filtration function.
  • each filter element is matched and the volume is taken into consideration, so it will not cause a large volume, but will only be smaller than when the filter element is alone; all nozzles such as the water inlet, pure water outlet and concentrated water outlet are set at one end of the bottle body
  • the layout can effectively avoid the problem of large space occupation ratio caused by the distribution of the two ends of the interface;
  • the filter element is set in a bottle body to effectively integrate the five-stage filtration function.
  • the design matches the life of each filter element, compared with the single-stage filter element or the two-stage, three-stage or even four-stage filter element. Life mismatches lead to inconsistent core replacement cycles and frequent core replacement issues.
  • the service life of the filter element inside the bottle body is basically the same. Therefore, the replacement cycle is the same, and the core replacement is effective. Avoid frequent core replacement problems caused by inconsistent core replacement cycles when each filter element is used alone.
  • Fig. 1 is a front cross-sectional structural diagram of a roll-type membrane module with a central tube of the present disclosure
  • Figure 2a is a sectional structural view of the central tube in Figure 1;
  • Figure 2b is a left structural view of the central tube in Figure 2a;
  • Figure 3a is a sectional structural view of the first end cap in Figure 1;
  • Figure 3b is a left structural view of the first end cap in Figure 3a;
  • Figure 4 is a sectional structural view of the second end cover in Figure 1;
  • Fig. 5 is a schematic diagram of the unfolded structure of the roll film of the roll film module with the central tube of the present disclosure.
  • FIG. 6 is a schematic diagram of the three-dimensional internal structure (flow path direction) of the composite filter element assembly of the present disclosure and the structure of the filter element part and the center tube are marked;
  • Fig. 7 is a three-dimensional internal structure diagram of the composite filter element assembly in Fig. 6 when the seal part and the cavity part are marked;
  • FIG. 8 is a schematic diagram of the appearance structure of the composite filter element assembly of the present disclosure.
  • Fig. 9 is a structural diagram of the water purification system of the present disclosure.
  • Composite filter element; 200 filter element; 201, first-stage pretreatment filter element; 202, second-stage pretreatment filter element; 203, fine filter element; 205, post-treatment filter element; 301, first seal; 302, second Seal; 303, the third seal; 304, the fourth seal; 401, the first connection end cover; 402, the second connection end cover; 403, the third connection end cover; 406, the sixth connection end cover; 501 , The first cavity; 502, the second cavity; 503, the third cavity; 504, the fourth cavity; 505, the fifth cavity; 506, the sixth cavity; 507, the seventh cavity; 508, The eighth cavity; 509, the ninth cavity; 601, the handle; 604, the bottle body; 701, the water inlet; 702, the concentrated water outlet; 703, the pure water outlet; 202b, the support sleeve; 202a, the water through hole; 801, water inlet valve; 802, pump; 804, waste water valve, 805; faucet switch; 806, gooseneck faucet; 901, water inlet check valve; 90
  • the present disclosure provides a center tube for roll film, wherein the center tube 102 is a cylindrical structure, and the cylindrical structure includes an inner wall 102d and an outer wall 102e, and is located on the inner wall.
  • the cavity 102f inside 102d, and the central tube 102 is made of a filter material that can allow fluid to pass (mainly water permeable) to allow fluid to circulate from the inner wall 102d to the outer wall 102e, or from the outer wall 102e circulates to the inner wall 102d and reaches the cavity 102f.
  • the central tube of the roll membrane is made of a filter material that allows fluid to pass through, so that water can flow through the central tube made of the filter material, thereby forming a primary filtration effect on the water, which can make the Compared with the structure of the related technology that needs to increase the filter element technology to improve the filtering effect, the central tube itself can form the role of primary filtration, which realizes the integration of the structure and function of the central tube, so that it can not only support the roll membrane and Collecting the produced water can also achieve the filtering effect, which effectively reduces the increase in the volume of the filter element, which is conducive to the effective reduction of the volume of the whole machine.
  • the center tube is a plastic center tube, which only has a hole in the center of the tube, and other places are closed.
  • the water produced by the membrane in the unopened area needs to flow into the open area along the wall, and the flow path is long; In the membrane area of the hole, the product water is directly discharged from the membrane hole, and the flow path is short.
  • the center tube is made of carbon rods, because of the uniform structural microporous structure distributed on its surface, the water produced by the diaphragm in contact with the carbon rods can be led out into the cavity in time.
  • the rear carbon rod filter element is made into a structure that can wrap the RO membrane, which can realize the composite of the RO membrane and the rear filter element, and realize the function of one core and two stages of purification.
  • the filter material that can allow fluid to pass through includes at least one of carbon material, polypropylene pp material, and ceramic material. This is the material of the filter material of the present disclosure in some embodiments. It can allow the effective passage of water. In addition, it can also filter the water passing through it, and realize the support function of the center tube while still The formation of a first-level filtering effect overcomes the defect of the increase in volume caused by the increase in the number of filter elements, reduces the volume and saves costs.
  • the central tube 102 is a cylindrical carbon rod structure composed of the carbon material; or, the central tube 102 is a cylindrical PP structure composed of the polypropylene pp material; or, so The central tube 102 is a cylindrical ceramic tube composed of the ceramic material.
  • the filter material that can allow fluid to pass through in the present disclosure may include: carbon rod, cylindrical polypropylene pp material filter material, ceramic tube, etc.
  • carbon that can improve the taste is used as the center tube material of the rolled membrane element.
  • the center tube of the plastic parts used in the roll membrane in the related technology can be discarded, and the use of the center tube of the plastic part of the roll membrane element in the related technology can be avoided, and a membrane element with two-stage filtering function can be realized;
  • the membrane element integrates the two-stage filtration function of the fine filter filter element and the rear taste filter element;
  • the carbon central tube has no macroscopic holes visible to the naked eye, and its surface is covered with structural micropores, compared with traditional plastics The central tube with large holes can be seen, and the water produced by the rolled membrane is easier to collect; the PP cylindrical central tube can effectively remove all kinds of particles and impurities in the filtered liquid.
  • the ceramic cylindrical center tube can filter, antibacterial and activate drinking water, and remove harmful residual chlorine and suspended pollutants, organic chemicals, colors and odors. By using this filter element, drinking water that meets a certain drinking standard can be filtered out.
  • the present disclosure also provides a roll-type membrane module, which includes the central tube set as a roll-type membrane described in any one of the preceding items, and also includes a roll-type membrane 103 wound around the outer circumference of the central tube 102, and The roll membrane 103 can allow water to pass through and filter the water.
  • the roll-type membrane module of the present disclosure uses a central tube (filter material) of a new structure and is rolled with a roll-type membrane, so that the prepared roll-type membrane module has a two-stage filtration function at the same time, so that water can flow through the filter material.
  • the center tube is made into a primary filtration effect on water, which can make it possible to form a primary filtration effect through the center tube itself compared with the structure of the related technology that needs to increase the filter element technology to improve the filtration effect.
  • the integration of the structure and function of the central tube makes it not only able to support the roll membrane and collect the produced water but also realize the filtering effect, which effectively reduces the increase in the volume of the filter element, which is conducive to the effective reduction of the volume of the whole machine.
  • it further includes a first end cap 101 disposed at an axial end of the central tube 102, the first end cap can seal the axial end of the central tube 102; and/ or,
  • It also includes a second end cap 104 that is clamped and arranged at the other axial end of the central tube 102, and a water outlet connector 105 is also connected to the radial inner side of the second end cap 104 to allow the inner part of the central tube 102 The water in the water flows out from the outlet connector 105.
  • the first end cap can form a sealing effect on the axial end of the central tube, so that The water at this end penetrates from the end surface of the roll membrane 103 and then enters the central tube and cavity to achieve the effect of secondary filtration.
  • the water flowing out through the roll membrane 103 is concentrated water and flows out through the inner cavity of the central tube.
  • the water is pure water.
  • the second end cover can be used to clamp and seal the other end of the central pipe in the axial direction, so that water can only flow out from the outlet joint inside the central pipe (pure water), Or flow out from the lower end of the roll membrane (concentrated water).
  • the first end cap 101 includes a first extension arm 101d located radially outside and extending in the axial direction, and a second extension arm 101e located radially inside and extending in the axial direction.
  • the space between the first extension arm 101d and the second extension arm 101e is formed as a space capable of clamping the inner wall and the outer wall of the central tube 102.
  • This is the structural form of the first end cover of the present disclosure in some embodiments.
  • the arrangement of the first and second extension arms can form a snap-fit connection with the axial end of the central tube, which is convenient for assembly and positioning.
  • the second extension arm 101e is attached to the inner wall of the axial end of the central tube 102; the outer wall of the central tube 102 is also located at the axial end.
  • a first step 102 a is formed, and the first extension arm 101 d is engaged with the first step 102 a so that the outer peripheral surface of the first extension arm 101 d is flush with the outer peripheral surface of the central tube 102.
  • the central position of the first end cap 101 is further formed with a film roll groove 101a configured as a film roll toward the axial direction of the central tube 102; and/or, the first end
  • the first extension arm 101d and the second extension arm 101e of the cover 101 are further provided with a first fixing rib 101b extending in the axial direction, and the axial end of the central tube 102 is also axially extending.
  • a fixing groove 102c is recessed, and a clamping limit can be formed between the first fixing rib 101b and the fixing groove 102c to clamp and fix the end surface of the axial end of the central tube 102 And/or, the direction opposite to the extending direction of the first extension arm 101d and the second extension arm 101e of the first end cover 101 is also convexly provided with at least one first limiting rib 101c.
  • the film rolling card slot can allow the shaft of the film rolling machine to be inserted into it when the film is rolled to drive the central tube to rotate. In this way, the film rolling effect of the roll film is realized; the first fixing rib and the fixing groove provided on the end surface of the center tube can form a snap fit between the two, which can be formed when the first end cover and the center tube are assembled.
  • the positioning or limiting function improves the assembly effect; the first limiting rib can make the first end cover protrude upward to form a convex structure, so that water can pass between the protrusions, so that the roll film can be normally reached from The upper end surface of the water flows downwards to ensure the normal flow of water.
  • the second end cover 104 includes a third extension arm 104c located radially outside and extending in the axial direction, and a fourth extension arm 104d located radially inside and extending in the axial direction.
  • the space between the third extension arm 104c and the fourth extension arm 104d is formed as a space capable of clamping the inner wall and the outer wall of the other end of the central tube 102 in the axial direction.
  • This is the structural form of the second end cap of the present disclosure in some embodiments.
  • the third and fourth extension arms it can form a snap-fit connection with the other end of the central tube in the axial direction, which is convenient for assembly and positioning. .
  • the fourth extension arm 104d fits and clamps on the inner wall of the other end of the central tube in the axial direction; and/or, the outer wall of the central tube 102 is located on the shaft
  • a second step 102b is also formed at a position toward the other end, and the third extension arm 104c is clamped at the outer peripheral wall of the second step 102b so that the outer peripheral surface of the third extension arm 104c is in contact with the The outer circumference of the central tube 102 is flush.
  • This is a structural form in which the third extension arm and the fourth extension arm of the present disclosure are matched with the inner and outer walls of the center tube respectively. It can be realized that the center tube is effectively snapped together while ensuring that the outer circumference of the center tube and the third The outer circumferential surface of the extension arm is flush, so that the roll film is conveniently wound on the outer circumferential surface.
  • a second fixing rib 104b and the center tube The other end in the axial direction of 102 is also provided with a fixing groove 102c recessed in the axial direction.
  • the end surface of the other end in the axial direction is clamped and fixed; and/or, the inner side of the fourth extension arm 104d of the second end cover 104 is further provided with a second limiting rib protruding in the radial direction 104a, the second limiting rib 104a can form a limiting and/or positioning with the outlet joint 105.
  • the second fixing rib and the fixing groove provided on the end surface of the central tube can make a clamping connection between the two
  • the cooperation can form a positioning or limiting effect on the assembly between the first end cap and the center tube, and improve the assembly effect; the second limiting rib can make it form a limiting effect on the water outlet joint, forming a positioning assembly, and improving assembly Effect.
  • the connecting portion between the first end cap 101 and the center tube 102 is also connected by bonding; and/or, the second end cap 104 and the center tube 102 are connected
  • the roll film 103 is wound around the axial end of the central tube 102 and arranged on the outer periphery of the first end cap 101; and/or, The roll film 103 is wound around the outer periphery of the second end cap 104 at the other end in the axial direction of the central tube 102.
  • the first end cover and the second end cover are respectively connected to the center tube by bonding, which improves the connection firmness between the end cover and the center tube, and improves the sealing strength.
  • the roll film wound on the end cover can improve the winding Effect and sealing effect.
  • the assembly form of the parts of the carbon center tube is as follows: the first end cap 101 and the second end cap 104 are fixedly connected to the steps corresponding to the two ends of the carbon rod by means of glue.
  • the water outlet connector 105 is directly installed in the second end cover 104 after the roll film is rolled, and its function is to conduct pure water.
  • the roll film 103 includes a roll film 201a, a glue line 202a, a water production screen 203a and a water inlet screen
  • the roll film 201a includes a separation layer and a non-separation layer
  • the roll membrane 201a is folded in half at the separation layer, the water inlet screen is placed in the folded position of the roll membrane, and one side of the non-separated layer and the water production screen 203a are
  • the glue line 202a is arranged on the inner peripheral side of the roll film 103 and opposite to the first end cover 101 and/or the second end cover 104. This is the structure of the roll film of the present disclosure in some embodiments.
  • the water production screen is wound around the outer circumference of the central tube, the roll film is then wound around the outer circumference of the water production screen, and the glue line is tied to the corresponding end cap.
  • the position can be sealed with the diaphragm and the end cap through glue.
  • FIG. 5 When the carbon center tube is used to prepare a roll film, the schematic diagram of the roll film is shown in FIG. 5.
  • the roll diaphragm 201a is evenly distributed at the end caps near the two ends of the carbon center tube.
  • the water production screen 203a, the water production screen 203a and the roll diaphragm 201a are overlapped, and the glue line is placed close to the roll diaphragm 201a.
  • the edge position of the water separation net 203a but not overlapped with the edge. It needs to keep a distance from the edge line.
  • the glue line 202a needs to be punched on the first end cover 101 and the second end cover 104. Its function is to realize the roll type with the help of the end cover
  • the membrane element is sealed, because if it is hit on the carbon center tube, it cannot be sealed due to its porous structure.
  • the present disclosure also provides a water purification system, which includes the roll-type membrane module described in any one of the preceding items.
  • the central pipe of the water purifier is made of a filter material that allows fluid to pass through, so that water can flow through the central pipe made of the filter material, thereby forming a primary filtering effect on the water, which can make the Compared with the structure of the related technology that needs to increase the filter element technology to improve the filtering effect, the central tube itself can form the role of primary filtration, which realizes the integration of the structure and function of the central tube, so that it can not only support the roll membrane and Collecting the produced water can also achieve the filtering effect, which effectively reduces the increase in the volume of the filter element, which is conducive to the effective reduction of the volume of the whole machine;
  • the present disclosure can abandon the center tube of the plastic parts used in the roll membrane in the related technology, avoid the use of the center tube of the plastic part of the roll membrane element in the related technology, and can realize that a membrane element has a two-stage filtering function; using a carbon center tube, It can avoid the subsequent use of the taste filter element.
  • the membrane element integrates the two-stage filtration function of the fine filter filter element and the rear taste filter element; the carbon center tube has no macroscopic holes visible to the naked eye, and its surface is covered with structural micropores, compared with the traditional Plastic parts can be seen in the central tube with large holes, and the water produced by the roll diaphragm is easier to collect.
  • a composite filter element assembly which includes:
  • the bottle body 604 and the multi-stage filter element arranged inside the bottle body include a pre-treatment filter element, a fine filter element 203, and a post-treatment filter element group;
  • the post-treatment filter element group includes a central tube 102 made of a water-permeable filter material
  • the fluid sequentially passes through the pretreatment filter element, the fine filter element, and the post-treatment filter element group to be filtered;
  • the bottom or top of the bottle body 604 is provided with a water inlet 701, on the bottle body 604 and
  • a pure water outlet 703 and a concentrated water outlet 702 are also provided at a position on the same side as the water inlet.
  • the central pipe of the water purifier is made of a permeable filter material, so that water can flow through the central pipe made of the filter material, thereby forming a primary filtering effect on the water, which can make the
  • improving the filtering effect requires increasing the structure of the filter element technology.
  • the central tube itself can form a first-level filtration function, which realizes the integration of the central tube structure and functions, so that it can not only support the roll membrane and collect the product.
  • the water can also achieve a filtering effect, which effectively reduces the increase in the volume of the filter element, which is conducive to the effective reduction of the volume of the whole machine.
  • a support sleeve radially inside the inner wall of the center tube, it can support the material with filtering function (because of its filtering function, usually its structural strength is not enough to support or the support strength is not high enough), thereby improving the center
  • the firm fixation of the tube provides conditions for long-term filtration.
  • the center tube is a plastic center tube, which only has a hole in the center of the tube, and other places are closed.
  • the water produced by the membrane in the unopened area needs to flow into the open area along the wall, and the flow path is long; In the membrane area of the hole, the product water is directly discharged from the membrane hole, and the flow path is short.
  • the center tube is made of carbon rods, because of the uniform structural microporous structure distributed on its surface, the water produced by the diaphragm in contact with the carbon rods can be led out into the cavity in time.
  • the rear carbon rod filter element is made into a structure that can wrap the RO membrane, which can realize the composite of the RO membrane and the rear filter element, and realize the function of one core and two stages of purification.
  • the central tube supporting the rolled membrane is a post-activated carbon filter material, which reduces the use of traditional plastic central tubes, and can simultaneously play supporting and purifying functions; the fine filter element does not require a separate cavity, and its cavity and pretreatment filter element
  • the water chamber is shared to reduce the use of the fine filter element in a separate closed chamber; the rear ultrafilter is installed upside down, but the installation cavity has enough exhaust space to avoid the suffocation problem that occurs when the ultrafiltration is installed upside down.
  • the multi-stage filter element is a filter element with five or more stages
  • the pre-treatment filter element includes a first-stage pre-treatment filter element 201 and a second-stage pre-treatment filter element 202
  • the post-treatment filter element group also includes post-treatment Filter element 205; along the flow direction of the fluid, the fluid sequentially passes through the first-stage pretreatment filter element 201, the second-stage pretreatment filter element 202, the fine filter element 203, the center tube 102, and the post-treatment filter element 205 and Is filtered.
  • a five-stage or more filter element is arranged inside the bottle body, and the fluid sequentially passes through the first-stage pretreatment filter element, the second-stage pretreatment filter element, the fine filter element, and the center along the flow direction of the fluid.
  • Tube and the post-processing filter element to be filtered an integrated composite filter element, which contains a five-stage filter element, which can be used alone in a water purifier to perform the purification function, compared with the single-stage filter element or the two-stage, three-stage or even the related technology in the related technology.
  • a five-stage filtration effect can be achieved in a bottle body, which can effectively improve the filtration effect while miniaturizing the filter element assembly and even the water purifier.
  • the filter element integrates the five-stage filtration function and is designed to match The life of each filter element takes into account the volume, so it will not cause a large volume, but will only be smaller than the single filter element;
  • the filter element is set in a bottle body, which effectively integrates the five-stage filtration function.
  • the design matches the life of each filter element, which is compared with the life of the single-stage filter element or the bottle body of the two-stage, three-stage or even four-stage filter element.
  • the service life of the filter element inside the bottle body is basically the same when the internal filter element is replaced. Frequent replacement of the core caused by the inconsistent replacement cycle when the filter element is used alone.
  • all the water inlets such as the water inlet, pure water outlet, and concentrated water outlet, are arranged at one end of the bottle body, which can effectively avoid the problem of large space occupation ratio caused by the distribution of the two ends of the interface.
  • the material of the first-stage pretreatment filter element 201 is PP cotton (in some embodiments, spray pp cotton, origami pp cotton, etc.); and/or, the second-stage pretreatment filter element 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 water-permeable filter material includes: carbon material, polypropylene pp material And at least one of ceramic materials; and/or, a cylindrical support sleeve 202b is further provided on the radial inner side of the central tube 102, and at least one water-passing hole 202a is also provided on the support sleeve 202b; And/or, the material of the post-treatment filter element 205 is a microfiltration membrane and/or an ultrafiltration membrane; and/or, the post-treatment filter element 205 is mounted upside down (the post-treatment filter element includes a mounting seat and a hollow fiber membrane
  • the first-stage pretreatment filter element 201 can be spray-melted PP cotton, origami pp cotton, and its function is mainly to play the first-stage filtration to remove large suspended solids, sediment, rust and other pollutants in the water body;
  • the second-stage pretreatment The treatment filter element 202 can be a sintered carbon rod, whose function is mainly to adsorb and remove residual chlorine and small molecular organic substances in the water body;
  • the fine filter element 203 can be a roll-type reverse osmosis filter element or a roll-type nanofiltration filter element, and its function is fine filtration. It can remove heavy metal ions, small molecular organics, etc.
  • the material of the filter material of the central tube is at least one of carbon material, polypropylene pp material and ceramic material. This can allow water to pass through and be filtered. Also, by providing a support sleeve radially inside the inner wall of the center tube, it can support the material with filtering function (because of its filtering function, usually its structural strength is not enough to support or the support strength is not high enough), thereby improving the center
  • the firm fixation of the tube provides conditions for achieving long-term filtration;
  • the post-processing filter element 205 can be a microfiltration membrane, an ultrafiltration membrane, etc., and its role is to prevent the effluent microorganisms from exceeding the standard and ensure the sanitation and safety of the water.
  • the first stage pretreatment filter element 201 and the second stage pretreatment filter element 202 are located at the same height and arranged inside and outside, and the first stage pretreatment filter element 201 is sleeved on the second stage The outside of the filter element 202 is pre-treated. In this way, the water flow passes through the outer first-stage pretreatment filter element for purification and then enters the inner second-stage pretreatment filter element for processing, so as to realize the pretreatment or coarse filtration before fine filtration.
  • the fine filter element 203 is located below the first-stage pretreatment filter element 201 or the second-stage pretreatment filter element 202, and the central pipe 102 and the post-treatment filter element 205 are sheathed Inside the fine filter element 203, and the post-processing filter element 205 is sleeved inside the central tube 102.
  • the layout of the filter element structure is as follows: the first-stage pre-treatment filter element 201 is wrapped or nested on the outer surface of the second-stage pre-treatment filter element 202 to form an internal and external structure; the last three-stage filter element and the first two-stage pre-treatment filter element are upper and lower structure layouts ; Central tube 102, post-processing filter element 205 two-stage post-processing filter element is packed in the fine filter element 203 filter element central tube; this structural layout can effectively omit the inner cylinder structure used in related technologies, and is realized by multiple connection end caps
  • the above two-stage pretreatment filter element is fixedly set, and the fixed setting of the fine filter element and the two-stage post-processing filter element (including ultrafiltration) are realized through the arrangement of multiple connecting end caps and central pipes, which effectively reduces The volume is reduced, and the volume miniaturization is realized.
  • the central tube 102 has a sixth cavity 506 inside, and the post-processing filter element 205 is disposed in the sixth cavity 506. This is the structural form of the central tube of the present disclosure in some embodiments.
  • the bottom end of the bottle body 604 is provided with a pure water outlet 703, and the lower end of the post-processing filter element 205 is in communication with the pure water outlet 703.
  • the water after the fine filtration filter element flows out through the first stage (central pipe) and the post-processing filter element, and is discharged from the bottom end to obtain pure water.
  • the bottom end of the bottle body 604 is further provided with a concentrated water outlet 702, and the lower end of the fine filter element 203 can communicate with the concentrated water outlet 702.
  • the water filtered out of the fine filter element but not 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 and cannot be used).
  • the top end of the bottle body 604 is provided with a first connecting end cap 401 to close the upper end of the bottle body 604; and/or, the first-stage pretreatment filter element 201 and the second
  • the upper end of the secondary pretreatment filter element 202 is further provided with a second connection end cap 402, and the second connection end cap 402 is fixedly arranged on the bottle body 604; and/or, the first stage pretreatment filter element 201
  • the bottom end of the second-stage pretreatment filter element 202 is also provided with a third connecting end cover 403, and the outer wall of the third connecting end cover 403 has a water passage formed by ribs to allow water to pass through (ribs refer to Is a protruding strip-shaped structure that protrudes outward on the outer wall);
  • a first end cap 101 is further provided at the upper position of the central tube 102, and a second end cap 104 is further provided at the lower end of the post-processing filter element 205; and/or, the lower end of the fine filter element 203
  • a sixth connecting end cover 406 is also provided, and the outer wall of the sixth connecting end cover 406 has a water passage formed by ribs to allow fluid to flow through.
  • the first connecting end cap can realize the function of closing and supporting the upper end of the bottle body, and the second connecting end cap forms a pair of The upper end of the second-stage pretreatment filter element supports the upper end, and the third connecting end cover supports and closes the lower ends of the first and second-stage pretreatment filter elements.
  • the first end cover can support the upper end of the central pipe.
  • the cover supports the post-processing filter element, and the sixth connecting end cover supports the fine filter element.
  • first connecting end cap 401 which is a bottle body end cap, which is connected to the bottle body by screwing or threading, and functions as a bottle body to achieve sealing
  • second connecting end cap 402 which is the first and second pretreatment
  • the upper end cover of the filter element is used for fixing and sealing
  • the third connecting end cover 403, specifically the lower end cover of the first and second pretreatment filter elements, is used to realize the limit and fixation of the first and second
  • the filter element 203 is connected to realize water communication.
  • the limit bar on the side wall of the end cover also provides a water passage function; the first end cover 101, which is the upper end cover of the center tube, is used for fixing; the second end cover 104, which is the lower end cover of the post-processing filter element; the sixth connection end cover 406, which is the lower end cover of the fine filter element, is used to separate the water inlet and the fine filter element.
  • the limit bar on the end cover To play the role of the water channel.
  • the upper part of the fine filter element 203 and the inner wall of the third connecting end cover 403 are provided with a first sealing member 301; and/or, the lower part of the fine filter element 203 and the sixth A second sealing member 302 is provided between the connecting end caps 406; and/or, a third sealing member 303 is provided on the outer peripheral wall of the lower end of the sixth connecting end cap 406; and/or, the lower end of the central tube 102
  • a water outlet connector 105 is also provided, and a fourth seal 304 is also provided on the outer periphery of the lower end of the water outlet connector 105.
  • the first sealing element realizes the sealing between the upper part of the fine filter element and the bottle body, so that the water can only flow down from the fine filter element, so that the water is fully subjected to the fine filtering treatment;
  • the second sealing element realizes the lower part of the fine filter element
  • the seal with the sixth connecting end cover makes the water from the fine filter element enter the post-processing filter element through the central pipe and the support sleeve to be filtered, which improves the filtering effect;
  • the third seal can ensure the sixth connecting end
  • the sealing effect between the cover and the bottom end of the central pipe prevents the water from the fine filter element from leaking to the pure water outlet from between the sixth connecting end cover and the central pipe;
  • the fourth sealing element can prevent the water from the pure water outlet Perform a sealing function.
  • the first seal 301 and the second seal 302 are salt water seal rings, which are used to separate the water inlet channel and the fine filter element; the third seal 303 is an O-ring on the sixth connecting end cover 406; The four sealing member 304 is an O-ring for sealing the water outlet joint.
  • the functions of the above-mentioned seals are to prevent water channeling and to achieve sealing.
  • first cavity 501 between the bottom of the sixth connecting end cap 406 and the bottle body 604; and/or, there is a first cavity 501 between the outer periphery of the fine filter element 203 and the bottle body 604 Second cavity 502; and/or, a third cavity 503 is formed between the outer periphery of the first-stage pretreatment filter element 201 and the bottle body 604; and/or, the second-stage pretreatment filter element 202
  • a fourth cavity 504 extending in a vertical direction inside; and/or, there is a fifth cavity 505 between the third connecting end cover 403 and the second sealing member 302; and/or, the post-processing
  • a seventh cavity 507 is formed between the bottom end of the filter element 205 and the central tube 102; and/or an eighth cavity 508 is formed between the bottom end of the fine filter element 203 and the sixth connecting end cover 406,
  • a ninth cavity 509 is formed between the inner wall of the lower end of the sixth connecting end cover 406 and the outer wall of the
  • the first cavity 501 is composed of the water inlet, the sixth connection end cap 406 and the bottle body 604, which is the raw water inlet cavity;
  • the second cavity 502 is the sixth connection end cap 406, the fine filter element 203, and the third connection
  • the end cap 403, the second sealing member 302, the third sealing member 303 and the bottle body 604 are composed of the raw water inlet cavity;
  • the third cavity 503 is the second connecting end cap 402, the third connecting end cap 403, and the bottle body 604 and the first and second pretreatment filter elements are combined to form a raw water inlet cavity.
  • the first cavity 501, the second cavity 502, and the third cavity 503 communicate with each other.
  • the fourth cavity 504 is the second pretreatment filter element cavity, which is a filtered water outlet cavity; the fifth cavity 505 is in communication with the fourth cavity 504, which is a fine filter element inlet cavity; the sixth cavity 506 It is the water inlet cavity of the center tube; the seventh cavity 507 is the water outlet cavity of the center tube; the eighth cavity 508 is the concentrated water outflow cavity of the fine filter element, communicates with the ninth cavity 509, and flows out from the concentrated water outlet.
  • the present disclosure also provides a water purification system, which includes the composite filter element assembly described in any one of the preceding items.
  • a five-stage or more filter element is arranged inside the bottle body, and the fluid sequentially passes through the first-stage pretreatment filter element, the second-stage pretreatment filter element, the fine filter element, and the center along the flow direction of the fluid.
  • a five-stage filtration effect can be achieved in a bottle body, which can effectively improve the filtration effect while miniaturizing the filter element assembly and even the water purifier.
  • the filter element integrates the five-stage filtration function and is designed to match The life of each filter element takes into account the volume, so it will not cause a large volume, but will only be smaller than the single filter element;
  • the filter element is set in a bottle body, which effectively integrates the five-stage filtration function.
  • the design matches the life of each filter element, which is compared with the life of the single-stage filter element or the bottle body of the two-stage, three-stage or even four-stage filter element.
  • the service life of the filter element inside the bottle body is basically the same when the internal filter element is replaced. Frequent replacement of the core caused by the inconsistent replacement cycle when the filter element is used alone.
  • the overall appearance of the composite filter element is shown in Fig. 9, and the bottle body is provided with a handle for easy access when changing the element. It can be expected that the bottle body is only to match the structure of the composite filter element assembly, which can realize the water inlet and outlet functions and replacement functions, and is not limited to the appearance provided in the drawings.
  • the layout of one end of the water inlet, pure water and concentrated water port is a technical feature of the present disclosure.
  • the composite filter element of the present disclosure can replace the traditional multi-stage filter element, and a single composite filter element of the present disclosure can be used to prepare a water purification device.
  • the upper and lower structures, inner and outer structures of the filter element disclosed in the present technology, and the upper and lower structures, and the inner and outer structures of the components are a way to cooperate to realize the integrated composite filter element.
  • the structure of the composite filter element includes an upper and lower structure, an inner and an outer structure.
  • the upper and lower structure is based on separation by end caps, but the upper and lower spaces are connected spaces.
  • the connecting channel is a water diversion groove on the side wall of the end cover.
  • the end cover is a common end cover for the pretreatment filter element and the fine filter element at the same time, saving space
  • the inner and outer structure is based on the central tube.
  • the central tube is different from the traditional central tube and has a large cavity.
  • the evenly distributed water diversion trough can increase the output of water.
  • the nozzles are distributed at one end, including a pressurized water inlet, a pure water outlet, and a concentrated water outlet.
  • the number of interfaces is small, which can effectively reduce the longitudinal space occupation caused by the distribution of the two ends of the interface.
  • the system principle is water source-pump-pretreatment-fine filter element-post-processing filter element.
  • the composite filter element can be set as a countertop water purifier, a drinking machine, etc.
  • the first-stage pretreatment filter element 201, the second-stage pretreatment filter element 202, the fine filter element 203, the central tube 102, and the post-processing filter element 205 can be spray-melted PP cotton, origami pp cotton, and its function is mainly to play the first-stage filtration to remove large suspended solids, sediment, rust and other pollutants in the water body;
  • the second-stage pretreatment The filter element can be a sintered carbon rod, which is mainly used to adsorb and remove residual chlorine and small molecular organics in the water;
  • the fine filter element can be a roll-type reverse osmosis filter element or a roll-type nanofiltration filter element, which is used for fine filtration and can remove water Medium and heavy metal ions, small molecular organics, etc., to achieve deep purification of the water;
  • the central tube can be a sintered carbon rod, which serves to improve the taste of the water produced by the fine filter element;
  • the post-processing filter element can be
  • the layout form of the filter element structure is as follows: the first-stage pretreatment filter element 201 is wrapped or nested on the outer surface of the second-stage pretreatment filter element 202 to form an internal and external structural layout; The first two-stage pretreatment filter element is an up-and-down structure; the two-stage post-processing filter element is packed in the center tube of the fine filter element.
  • first connecting end cap 401 which is a bottle body end cap, which is connected to the bottle body by screwing or threading, and functions as a bottle body to achieve sealing
  • second connecting end cap 402 which is the first and second pretreatment
  • the upper end cover of the filter element is used for fixing and sealing
  • the third connecting end cover 403, specifically the lower end cover of the first and second pretreatment filter elements, is used to realize the limit and fixation of the first and second
  • the filter element 203 is connected to realize water communication.
  • the limit bar on the side wall of the end cover also provides a water passage function; the first end cover 101, which is the upper end cover of the center tube, is used for fixing; the second end cover 104. It is the lower end cover of the center tube and can be connected to the post-processing filter element at the same time; the sixth connection end cover 406, which is the lower end cover of the fine filter element, is used to separate the water inlet and the fine filter element, and at the same time , The end cap has a limit bar to play the role of the water passage.
  • the first seal 301 is an O-ring at the water inlet end of the central tube, and its function is to cooperate with the first end cap 101 to seal the cavity of the central tube 102; the second seal 302 and the third seal 303 are salt water seals. , Its function is to realize the separation of the water inlet water path and the water path of the fine filter element; the fourth seal 304 is the O-ring on the second end cover 104; the fifth seal is the second housing (that is, the second post-processing bottle body) ) Is an O-ring for sealing; the sixth sealing element is an O-ring for sealing on the central tube 102; the seventh sealing element is an O-ring on the sixth connecting end cover 406.
  • the functions of the above-mentioned seals are to prevent water channeling and to achieve sealing.
  • the first cavity 501 is composed of the water inlet, the sixth connection end cap 406 and the bottle body 604, which is the raw water inlet cavity;
  • the second cavity 502 is the sixth connection end cap 406, the fine filter element 203, and the third connection
  • the end cap 403, the second sealing member 302, the third sealing member 303 and the bottle body 604 are composed of the raw water inlet cavity;
  • the third cavity 503 is the second connecting end cap 402, the third connecting end cap 403, and the bottle body 604 and the first and second pretreatment filter elements are combined to form a raw water inlet cavity.
  • the first cavity 501, the second cavity 502, and the third cavity 503 communicate with each other.
  • the fourth cavity 504 is the second pretreatment filter element cavity, which is a filtered water outlet cavity; the fifth cavity 505 is in communication with the fourth cavity 504, which is a fine filter element inlet cavity; the sixth cavity 506 It is the water inlet cavity of the center tube; the seventh cavity 507 is the water outlet cavity of the center tube; the eighth cavity 508 is the concentrated water outflow cavity of the fine filter element, communicates with the ninth cavity 509, and flows out from the concentrated water outlet.
  • Bottle body 604 which is the outer bottle body of the entire composite filter element; the second bottle body (ie, the second post-processing bottle body), is the outer bottle body of the second post-processing filter element; the sealing rubber stopper is used for sealing when the filter element is not in use .
  • the central pipe 102 has no penetrating water diversion holes on the central pipe. It is different from the traditional central pipe structure. The water diversion trough is used on the surface of the central pipe.
  • the second guide groove A is opened on the side wall of the end of the central pipe 102, and its function is to lead the produced water collected by the first guide groove A to the sixth under the action of the first end cover 101.
  • the inner space of the central tube cavity can be placed with a filter material.
  • the limiting device the first limiting device, is prepared integrally with the third connecting end cap 403 to realize the positioning function of the fine filter element 203; the second limiting device is integrally provided with the central tube 102 and acts as a positioning post-processing filter element 205.
  • the composite filter element In order to successfully prepare the composite filter element, it needs to include a nozzle, and the nozzle is arranged at one end.
  • the first water inlet is the raw water inlet 701, and the inlet water 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 the pure water outlet 703, the front-stage inlet water sequentially passes through the sixth cavity 506, the seventh cavity 507, and the eighth cavity 508 to enter the pure water outlet 703;
  • the third water outlet is the concentrated water outlet 702, and the front-stage inlet water sequentially passes through the first After the fourth cavity 504, the fifth cavity 505, the ninth cavity 509, and the tenth cavity enter the concentrated water outlet 702.
  • FIG. 9 The overall appearance of the composite filter element is shown in Figure 9, and the bottle body is provided with a handle (not shown) for the purpose of facilitating access when changing the element. It can be expected that the bottle body is only to match the structure of the composite filter element assembly, which can realize the water inlet and outlet functions and replacement functions, and is not limited to the appearance provided in the drawings.

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Abstract

一种中心管、卷式膜组件、复合滤芯组件和净水系统，中心管（102）为筒体结构，筒体结构包括内壁（102d）和外壁（102e）、以及位于内壁（102d）内侧的空腔（102f），且中心管（102）由能允许流体通过的滤材材质制成、以允许流体从内壁（102d）流通至外壁（102e）、或从外壁（102e）流通至内壁（102d）而到达空腔（102f）中。

Description

一种中心管、卷式膜组件、复合滤芯组件和净水系统
本公开要求于2020年02月19日提交中国专利局、申请号为202010103184.X、发明名称为“一种复合滤芯组件和净水系统”的中国专利申请的优先权，以及要求于2020年02月19日提交中国专利局、申请号为202010103366.7、发明名称为“一种用于卷式膜的中心管、卷式膜组件和净水系统”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开属于净水技术领域，具体涉及一种中心管、卷式膜组件、复合滤芯组件和净水系统。
背景技术
相关技术中的卷式膜元件，均需要缠绕在塑料件制备的中心管上，该中心管发挥的功能为支撑卷式膜和收集产水。此外，卷式膜在使用时，其后端均需要串联口感改善滤芯，造成滤芯级数增加，不利于整机体积减少。
净水机的核心零部件是发挥过滤功能的滤芯，而传统净水机包含多级滤芯，瓶体数量多造成整机体积偏大，且各级滤芯换芯周期不一致，增加换芯不便利性。近年来，净水机小体积成为一个行业发展趋势，越来越多的多级复合滤芯被使用在产品上。然而，目前已有的复合滤芯大多为两级复合、三级复合，相比于传统的包含单级滤芯的净水机，体积已有明显降低。但是，如若能实现一颗滤芯复合净水机多级滤芯发挥净化作用，净水机体积将有进一步减少的空间。
由于相关技术中的净水机中的中心管的作用为支撑卷式膜和收集产水，存在其后端需要串联口感改善滤芯，从而造成滤芯级数增加，不利于整机体积减少；净水机还存在为了保证过滤效果而增设多级过滤却导致体积较大、且各滤芯单独使用时存在换芯周期不一致而带来频繁换芯等技术问题，因此本公开研究设计出一种中心管、卷式膜组件、复合滤芯组件和净水系统。
发明内容
本公开的目的在于，针对上述缺陷，提供一种中心管、卷式膜组件、复合滤芯组件和净水系统，以解决相关技术中，净水机的中心管由于功能单一而导致若需提高过滤效果则需增加滤芯级数、导致体积增加等问题。
本公开提供一种中心管，其中：
所述中心管为筒体结构，所述筒体结构包括内壁和外壁、以及位于所述内壁内侧的空腔，且所述中心管由能允许流体通过的滤材材质制成、以允许流体从所述内壁流通至所述外壁、或从所述外壁流通至所述内壁而到达所述空腔中。
在一些实施方式中，所述能允许流体通过的滤材材质包括：碳材质、聚丙烯pp材质和陶瓷材质中的至少一种。
在一些实施方式中，所述中心管为由所述碳材质组成的筒状碳棒结构；或，所述中心管为由所述聚丙烯pp材质组成的筒状PP结构；或，所述中心管为由所述陶瓷材质组成的筒状陶瓷管的结构。
本公开还提供一种卷式膜组件，其包括前任一项所述的用于卷式膜的中心管，还包括围绕所述中心管的外周进行绕设的卷式膜、所述卷式膜能够允许水通过并对水进行过滤。
在一些实施方式中，还包括设置在所述中心管的轴向一端的第一端盖、所述第一端盖能对所述中心管的所述轴向一端进行密封；和/或，
还包括设置在所述中心管的轴向另一端的第二端盖、所述第二端盖的径向内侧还连接设置有出水接头、以允许所述中心管内部中的水从所述出水接头流出。
在一些实施方式中，所述第一端盖包括位于径向外侧且沿轴向方向延伸的第一延伸臂以及位于径向内侧且沿轴向方向延伸的第二延伸臂，所述第一延伸臂和所述第二延伸臂之间形成为能对所述中心管的内壁和外壁进行卡设的空间。
在一些实施方式中，所述第二延伸臂贴合卡设在所述中心管的所述轴向一端的内壁处；所述中心管的外壁在所述轴向一端的位置处还形成有第一台阶，所述第一延伸臂与所述第一台阶卡合、以使得所述第一延伸臂的外周面与所述中心管的外周面相平齐。
在一些实施方式中，所述第一端盖的中心位置还朝所述中心管的轴向方向 形成有用于卷膜的卷膜卡槽；和/或，所述第一端盖的所述第一延伸臂和所述第二延伸臂之间还沿轴向延伸地设置有第一固定筋条、所述中心管的所述轴向一端也沿轴向凹陷地设置有固定槽，所述第一固定筋条能与所述固定槽之间形成卡接定位；和/或，所述第一端盖的与所述第一延伸臂和所述第二延伸臂的延伸方向相背的方向还凸出地设置有至少一个第一限位筋条。
在一些实施方式中，所述第二端盖包括位于径向外侧且沿轴向方向延伸的第三延伸臂以及位于径向内侧且沿轴向方向延伸的第四延伸臂，所述第三延伸臂和所述第四延伸臂之间形成为能对所述中心管的所述轴向另一端的内壁和外壁进行卡设的空间。
在一些实施方式中，所述第四延伸臂贴合卡设在所述中心管的所述轴向另一端的内壁处；和/或，所述中心管的所述外壁在所述轴向另一端的位置处还形成有第二台阶，所述第三延伸臂卡接在所述第二台阶的外周壁处、以使得所述第三延伸臂的外周面与所述中心管的外周面相平齐。
在一些实施方式中，所述第二端盖的所述第三延伸臂和所述第四延伸臂之间还沿轴向延伸地设置有第二固定筋条、所述中心管的所述轴向另一端也沿轴向凹陷地设置有固定槽，所述第二固定筋条能与所述固定槽之间形成卡接限位；和/或，所述第二端盖的所述第四延伸臂的内侧还沿径向凸出地设置有第二限位筋条，所述第二限位筋条能与所述出水接头之间形成限位和/或定位。
在一些实施方式中，所述第一端盖与所述中心管之间的相接部位还通过粘接连接；和/或，所述第二端盖与所述中心管之间的相接部位还通过粘接连接；和/或，所述卷式膜在所述中心管的所述轴向一端缠绕设置在所述第一端盖的外周处；和/或，所述卷式膜在所述中心管的所述轴向另一端缠绕设置在所述第二端盖的外周处。
在一些实施方式中，所述卷式膜包括卷式膜片、胶线和产水隔网和进水隔网，所述卷式膜片包括分离层和非分离层，且所述卷式膜片在所述分离层处进行对折，所述进水隔网放置于卷式膜片的对折位置中，且所述非分离层的一面和所述产水隔网之间叠置，且所述胶线设置在所述卷式膜的内周侧、且与所述第一端盖和/或所述第二端盖相对的位置。
本公开提供一种复合滤芯组件，其包括：
瓶体和设置在所述瓶体内部的多级滤芯，包括预处理滤芯、精细过滤滤芯、 和后处理滤芯组；所述后处理滤芯组包括由可透水滤材做成的中心管；流体依次经过所述预处理滤芯、所述精细过滤滤芯、和所述后处理滤芯组而被过滤。
在一些实施方式中，所述多级滤芯为五级以上的滤芯，所述预处理滤芯包括第一级预处理滤芯和第二级预处理滤芯，所述后处理滤芯组还包括后处理滤芯；流体依次经过第一级预处理滤芯、第二级预处理滤芯、精细过滤滤芯、中心管和后处理滤芯而被过滤。
在一些实施方式中，所述第一级预处理滤芯的材料为PP；和/或，所述第二级预处理滤芯为烧结碳棒；和/或，所述精细过滤滤芯为卷式反渗透滤芯或卷式纳滤滤芯；和/或，所述能透水的滤材材质包括：碳材质、聚丙烯pp材质和陶瓷材质中的至少一种；和/或，所述后处理滤芯的材料为微滤膜和/或超滤膜。
在一些实施方式中，述中心管的径向内侧还设置有筒状结构的支撑套筒，所述支撑套筒上还设置有至少一个通水孔。
在一些实施方式中，所述第一级预处理滤芯和所述第二级预处理滤芯位于相同高度且内外布置，且所述第一级预处理滤芯套设于所述第二级预处理滤芯的外部。
在一些实施方式中，所述精细过滤滤芯位于所述第一级预处理滤芯或所述第二级预处理滤芯的下方，且所述中心管被套设于所述精细过滤滤芯的内部，所述后处理滤芯被套设于所述中心管的内部。
在一些实施方式中，所述中心管的内部具有第六空腔、所述后处理滤芯设置于所述第六空腔中。
在一些实施方式中，所述瓶体底端设置有纯水出口，所述后处理滤芯的下端与所述纯水出口连通。
在一些实施方式中，所述瓶体底端还设置有浓水出口，所述精细过滤滤芯的下端能与所述浓水出口进行连通。
在一些实施方式中，所述瓶体的顶端设置有第一连接端盖、以对所述瓶体上端进行封闭；和/或，所述第一级预处理滤芯和所述第二级预处理滤芯的上端还设置有第二连接端盖，所述第二连接端盖被固定设置于所述瓶体上；和/或，所述第一级预处理滤芯和所述第二级预处理滤芯的底端还设置有第三连接端盖，所述第三连接端盖外壁上具有筋条形成的过水通道；
和/或，所述中心管的上方位置还设置有第一端盖；和/或，所述后处理滤 芯的下端还设置有第二端盖；和/或，所述精细过滤滤芯的下端还设置有第六连接端盖，所述第六连接端盖外壁上具有筋条形成的过水通道。
在一些实施方式中，所述精细过滤滤芯的上部与所述第三连接端盖的内壁设置有第一密封件；和/或，所述精细过滤滤芯的下部与所述第六连接端盖之间设置有第二密封件；和/或，所述第六连接端盖的下端外壁上设置有第三密封件；和/或，所述中心管的下端还设置有出水接头，且所述出水接头的下端外周还设置有第四密封件。
在一些实施方式中，所述第六连接端盖底部与所述瓶体之间具有第一空腔；和/或，所述精细过滤滤芯周与所述瓶体之间之间形成第二空腔；和/或，所述第一级预处理滤芯的外周与所述瓶体之间形成第三空腔；和/或，所述第二级预处理滤芯的内部具有竖直方向延伸的第四空腔；和/或，所述第三连接端盖与所述第二密封件之间具有第五空腔；和/或，所述后处理滤芯的底端与所述中心管之间形成第七空腔；和/或，所述精细过滤滤芯的底部与所述第六连接端盖之间形成第八空腔、所述第六连接端盖下端内壁与所述出水接头下端外壁之间形成第九空腔，所述第九空腔上端与所述第八空腔连通、下端与所述浓水出口连通。
本公开还提供一种净水系统，其包括前任一项所述的卷式膜组件或包括前任一项所述的复合滤芯组件。
本公开提供的一种用于卷式膜的中心管、卷式膜组件和净水系统具有如下有益效果：
1.本公开通过将卷式膜的中心管通过由能允许流体通过的滤材材质制作，能够使得水能够流经该滤材材质制作成的中心管，从而对水形成一级过滤作用，可使得在相对于相关技术中提高过滤效果需要增加滤芯技术的结构而言，能够通过中心管本身便能形成一级过滤的作用，实现了中心管结构功能的集成化、使其不仅能够支撑卷式膜和收集产水还能实现过滤作用，有效地减小了滤芯体积的增加，利于整机体积的有效减小；
2.本公开可舍弃相关技术中卷式膜使用的塑料件中心管，避免相关技术中卷式膜元件塑料件中心管的使用，可实现一支膜元件具有两级过滤功能；利用碳质中心管，可避免后续再使用口感滤芯，膜元件集精细过滤滤芯和后置口感滤芯两级过滤功能于一体；碳质中心管无肉眼可视大孔，其表面布满结构性微孔，相比于传统塑料件可视大孔的中心管，卷式膜片产水更容易收集。
3.本公开通过在瓶体内部设置五级以上的滤芯，沿着流体的流动方向流体依次经过所述第一级预处理滤芯、所述第二级预处理滤芯、所述精细过滤滤芯、所述中心管和所述后处理滤芯而被过滤，一体式复合滤芯，其包含五级滤芯，可单独使用于净水机上发挥净化功能，相比于相关技术中的单级滤芯或者二级、三级甚至四级滤芯而言，在一个瓶体里能够实现五级过滤效果，能够有效提高过滤效果的同时还能使得滤芯组件乃至净水机体积小型化，滤芯集五级过滤功能一体，设计时匹配了各滤芯的寿命，且考虑了体积，所以不会造成体积大，只会比单独滤芯时体积小；将进水口、纯水出口以及浓水出口等所有水口均设置为在瓶体的一端布局，能有效避免接口两端分布造成的空间占用比大问题；
4.并且通过一个瓶体里设置滤芯，有效集五级过滤功能一体，设计时匹配了各滤芯的寿命，相比于单级滤芯或者二级、三级甚至四级滤芯的瓶体之间的寿命存在不匹配而导致换芯周期不一致的问题、带来换芯频繁的问题而言，更换内部滤芯时瓶体内部的滤芯的使用寿命基本都一致，因此换芯周期一致，一体换芯，有效避免各滤芯单独使用时存在的换芯周期不一致带来的换芯频繁问题。
本公开的其它特征和优点将在随后的说明书中阐述，并且，部分地从说明书中变得显而易见，或者通过实施本公开而了解。
下面通过附图和实施例，对本公开的技术方案做进一步的详细描述。
附图说明
图1是本公开的具有中心管的卷式膜组件的正面剖视结构示意图；
图2a是图1中的中心管的剖视结构图；
图2b是图2a中的中心管的左视结构图；
图3a是图1中的第一端盖的剖视结构图；
图3b是图3a中的第一端盖的左视结构图；
图4是图1中的第二端盖的剖视结构图；
图5是本公开的具有中心管的卷式膜组件的卷式膜展开的结构示意图。
图6是本公开的复合滤芯组件的立体内部结构(流路方向)以及标注出滤芯部分以及中心管等结构的示意图；
图7是图6中的复合滤芯组件的标注出密封件部分和空腔部分时的立体内 部结构示意图；
图8是本公开的复合滤芯组件的外观结构示意图；
图9是本公开的净水系统的结构图。
结合附图，本公开实施例中附图标记如下：
101、第一端盖；101a、卷膜卡槽；101b、第一固定筋条；101c、第一限位筋条；101d、第一延伸臂；101e、第二延伸臂；102、中心管；102a、第一台阶；102b、第二台阶；102c、固定槽；102d、内壁；102e、外壁；102f、空腔；103、卷式膜；104、第二端盖；104a、第二限位筋条；104b、第二固定筋条；104c、第三延伸臂；104d、第四延伸臂；105、出水接头；201a、卷式膜片；202a、胶线；203a、产水隔网；
10、复合滤芯；200、滤芯；201、第一级预处理滤芯；202、第二级预处理滤芯；203、精细过滤滤芯；205、后处理滤芯；301、第一密封件；302、第二密封件；303、第三密封件；304、第四密封件；401、第一连接端盖；402、第二连接端盖；403、第三连接端盖；406、第六连接端盖；501、第一空腔；502、第二空腔；503、第三空腔；504、第四空腔；505、第五空腔；506、第六空腔；507、第七空腔；508、第八空腔；509、第九空腔；601、把手；604、瓶体；701、进水口；702、浓水出口；703、纯水出口；202b、支撑套筒；202a、通水孔；801、进水阀；802、泵；804、废水阀，805；龙头开关；806、鹅颈龙头；901、进水单向阀；902、浓水止水阀；903、纯水止水阀。
具体实施方式
为使本公开的目的、技术方案和优点更加清楚，下面将结合本公开具体实施例及相应的附图对本公开技术方案进行清楚、完整地描述。显然，所描述的实施例仅是本公开一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
如图1-5所示，本公开提供一种用于卷式膜的中心管，其中所述中心管102为筒体结构，所述筒体结构包括内壁102d和外壁102e、以及位于所述内壁102d 内侧的空腔102f，且所述中心管102由能允许流体通过(主要是透水)的滤材材质制成、以允许流体从所述内壁102d流通至所述外壁102e、或从所述外壁102e流通至所述内壁102d而到达所述空腔102f中。
本公开通过将卷式膜的中心管通过由能允许流体通过的滤材材质制作，能够使得水能够流经该滤材材质制作成的中心管，从而对水形成一级过滤作用，可使得在相对于相关技术中提高过滤效果需要增加滤芯技术的结构而言，能够通过中心管本身便能形成一级过滤的作用，实现了中心管结构功能的集成化、使其不仅能够支撑卷式膜和收集产水还能实现过滤作用，有效地减小了滤芯体积的增加，利于整机体积的有效减小。
相关技术中中心管，为塑料件中心管，只在管中央开孔，其它地方为封闭的，由此造成未开孔区域膜片产水需要沿壁流入开孔区域，流径长；而开孔区域膜片，产水直接从膜孔出去，流径短。而用碳棒做中心管，由于其本身表面分布有均匀的结构性微孔结构，因此和碳棒接触的膜片的产水均能及时导出到空腔内。将后置碳棒滤芯做成可缠绕RO膜的结构形式，可实现RO膜和后置滤芯的复合，实现一芯两级净化功能。
在一些实施方式中，所述能允许流体通过的滤材材质包括：碳材质、聚丙烯pp材质和陶瓷材质中的至少一种。这是本公开的滤材材质的在一些实施方式中的材质，能够实现允许水的有效通过，除此之外还能对经过其的水进行过滤作用，将中心管实现支撑功能的同时还能形成一级的过滤效果，克服了由于滤芯级数增加而带来的体积增加的缺陷，减小体积，节省成本。
在一些实施方式中，所述中心管102为由所述碳材质组成的筒状碳棒结构；或，所述中心管102为由所述聚丙烯pp材质组成的筒状PP结构；或，所述中心管102为由所述陶瓷材质组成的筒状陶瓷管的结构。这是本公开的在一些实施方式中的过滤结构形式，如碳棒、PP筒状以及陶瓷管的结构形式。
本公开能允许流体通过的滤材可包括：碳棒、圆筒状聚丙烯pp材质滤材、陶瓷管等，在一些实施方式中利用可改善口感的碳作为卷式膜元件的中心管材质，可舍弃相关技术中的卷式膜使用的塑料件中心管，避免相关技术中卷式膜元件塑料件中心管的使用，可实现一支膜元件具有两级过滤功能；利用碳质中心管，可避免后续再使用口感滤芯，膜元件集精细过滤滤芯和后置口感滤芯两级过滤功能于一体；碳质中心管无肉眼可视大孔，其表面布满结构性微孔，相 比于传统塑料件可视大孔的中心管，卷式膜片产水更容易收集；PP筒状中心管能有效去除所过滤液体中的各种颗粒杂质，可多层式深度结构，纳污量大，过滤流量大，压差小，不含任何化学粘合剂，更卫生，安全，耐酸、碱、有机溶液、油类，有良好的化学稳定性，集表面、深层、粗精滤为一体；具有流量大、耐腐蚀耐高压低成本等特点。用以阻挡水中的铁锈、泥沙、虫卵等大颗粒物质。陶瓷筒状中心管能够对饮用水进行过滤、抗菌和活化处理，有害的去除余氯和悬浮污染物、有机化学物质、颜色与异味，通过使用该滤芯能够过滤出达到一定饮用标准的饮用水。
本公开还提供一种卷式膜组件，其包括前任一项所述的被设置为卷式膜的中心管，还包括围绕所述中心管102的外周进行绕设的卷式膜103、所述卷式膜103能够允许水通过并对水进行过滤。本公开的卷式膜组件利用新结构形式的中心管(过滤材质)，用卷式膜卷制，使得制备的卷式膜组件同时具有两级过滤功能，能够使得水能够流经该滤材材质制作成的中心管，从而对水形成一级过滤作用，可使得在相对于相关技术中提高过滤效果需要增加滤芯技术的结构而言，能够通过中心管本身便能形成一级过滤的作用，实现了中心管结构功能的集成化、使其不仅能够支撑卷式膜和收集产水还能实现过滤作用，有效地减小了滤芯体积的增加，利于整机体积的有效减小。
在一些实施方式中，还包括设置在所述中心管102的轴向一端的第一端盖101、所述第一端盖能对所述中心管102的所述轴向一端进行密封；和/或，
还包括卡接设置在所述中心管102的轴向另一端的第二端盖104、所述第二端盖104的径向内侧还连接设置有出水接头105、以允许所述中心管102内部中的水从所述出水接头105流出。
这是本公开的中心管轴向一端的第一端盖的结构形式和轴向另一端的第二端盖的结构形式，通过第一端盖能够对中心管的轴向一端形成密封作用，使得该端的水从卷式膜103的端面进行渗透、进而进入中心管、空腔中，实现二级过滤的效果，经过卷式膜103而流出的水为浓水、经过中心管内部空腔流出的水为纯水，如图1所示，通过第二端盖能够对中心管的轴向另一端进行卡接作用和密封作用，使得水只能从中心管内部的出水接头流出(纯水)、或从卷式膜下端流出(浓水)。
在一些实施方式中，所述第一端盖101包括位于径向外侧且沿轴向方向延 伸的第一延伸臂101d以及位于径向内侧且沿轴向方向延伸的第二延伸臂101e，所述第一延伸臂101d和所述第二延伸臂101e之间形成为能对所述中心管102的内壁和外壁进行卡设的空间。这是本公开的第一端盖的在一些实施方式中的结构形式，通过第一和第二延伸臂的设置能够与中心管的轴向一端端部形成卡接式连接、方便装配和定位。
在一些实施方式中，所述第二延伸臂101e贴合卡设在所述中心管102的所述轴向一端的内壁处；所述中心管102的外壁在所述轴向一端的位置处还形成有第一台阶102a，所述第一延伸臂101d与所述第一台阶102a卡合、以使得所述第一延伸臂101d的外周面与所述中心管102的外周面相平齐。这是本公开的第一延伸臂和第二延伸臂分别与中心管的内外壁匹配相接的结构形式，能够实现在于中心管之间有效卡接的同时还能保证中心管外周面与第一延伸臂的外周面平齐，从而方便卷式膜在该外周面上卷式缠绕。
在一些实施方式中，所述第一端盖101的中心位置还朝所述中心管102的轴向方向形成有被设置为卷膜的卷膜卡槽101a；和/或，所述第一端盖101的所述第一延伸臂101d和所述第二延伸臂101e之间还沿轴向延伸地设置有第一固定筋条101b、所述中心管102的所述轴向一端也沿轴向凹陷地设置有固定槽102c，所述第一固定筋条101b能与所述固定槽102c之间形成卡接限位，以对所述中心管102的所述轴向一端的端面进行卡接固定；和/或，所述第一端盖101的与所述第一延伸臂101d和所述第二延伸臂101e的延伸方向相背的方向还凸出地设置有至少一个第一限位筋条101c。
这是本公开的第一端盖以及中心管相应部位上设置的在一些实施方式中的结构形式，卷膜卡槽能够容许在卷膜的时候将卷膜机的轴插入其中、带动中心管转动从而实现卷式膜的卷膜作用；通过第一固定筋条和中心管端面上设置的固定槽能够使得二者之间形成卡接配合，能够对第一端盖和中心管之间装配时形成定位或限位作用，提高装配效果；通过第一限位筋条能够使得第一端盖朝上方凸出形成凸起结构，从而使得凸起之间能够通过水、使得从能够正常到达卷式膜的上端面而往下流，保证了正常的水流流过。
在一些实施方式中，所述第二端盖104包括位于径向外侧且沿轴向方向延伸的第三延伸臂104c以及位于径向内侧且沿轴向方向延伸的第四延伸臂104d，所述第三延伸臂104c和所述第四延伸臂104d之间形成为能对所述中心管102 的所述轴向另一端的内壁和外壁进行卡设的空间。这是本公开的第二端盖的在一些实施方式中的结构形式，通过第三和第四延伸臂的设置能够与中心管的轴向另一端端部形成卡接式连接、方便装配和定位。
在一些实施方式中，所述第四延伸臂104d贴合卡设在所述中心管的所述轴向另一端的内壁处；和/或，所述中心管102的所述外壁在所述轴向另一端的位置处还形成有第二台阶102b，所述第三延伸臂104c卡接在所述第二台阶102b的外周壁处、以使得所述第三延伸臂104c的外周面与所述中心管102的外周面相平齐。这是本公开的第三延伸臂和第四延伸臂分别与中心管的内外壁匹配相接的结构形式，能够实现在于中心管之间有效卡接的同时还能保证中心管外周面与第三延伸臂的外周面平齐，从而方便卷式膜在该外周面上卷式缠绕。
在一些实施方式中，所述第二端盖104的所述第三延伸臂104c和所述第四延伸臂104d之间还沿轴向延伸地设置有第二固定筋条104b、所述中心管102的所述轴向另一端也沿轴向凹陷地设置有固定槽102c，所述第二固定筋条104b能与所述固定槽102c之间形成卡接限位，以对所述中心管102的所述轴向另一端的端面进行卡接固定；和/或，所述第二端盖104的所述第四延伸臂104d的内侧还沿径向凸出地设置有第二限位筋条104a，所述第二限位筋条104a能与所述出水接头105之间形成限位和/或定位。
这是本公开的第二端盖以及中心管相应部位上设置的在一些实施方式中的结构形式，通过第二固定筋条和中心管端面上设置的固定槽能够使得二者之间形成卡接配合，能够对第一端盖和中心管之间装配时形成定位或限位作用，提高装配效果；通过第二限位筋条能够使得其对出水接头形成限位作用，形成定位装配，提高装配效果。
在一些实施方式中，所述第一端盖101与所述中心管102之间的相接部位还通过粘接连接；和/或，所述第二端盖104与所述中心管102之间的相接部位还通过粘接连接；和/或，所述卷式膜103在所述中心管102的所述轴向一端缠绕设置在所述第一端盖101的外周处；和/或，所述卷式膜103在所述中心管102的所述轴向另一端缠绕设置在所述第二端盖104的外周处。
第一端盖、第二端盖分别与中心管之间通过粘接连接，提高了端盖与中心管之间的连接牢固性、提高了密封强度，卷式膜缠绕在端盖上能够提高缠绕效果和密封效果。该碳质中心管，其各零部件的组装形式为：第一端盖101和第 二端盖104通过粘胶形式与碳棒上两端对应的阶梯进行固定连接。出水接头105为完成卷式膜卷制后，再直接装入第二端盖104里边，其作用为导纯水。
在一些实施方式中，所述卷式膜103包括卷式膜片201a、胶线202a、产水隔网203a和进水隔网，所述卷式膜片201a包括分离层和非分离层，且所述卷式膜片201a在所述分离层处进行对折，所述进水隔网放置于卷式膜片的对折位置中，且所述非分离层的一面和所述产水隔网203a之间叠置，且所述胶线202a设置在所述卷式膜103的内周侧、且与所述第一端盖101和/或所述第二端盖104相对的位置。这是本公开的卷式膜的在一些实施方式中的结构形式，产水隔网缠绕在中心管外周、卷式膜片再缠绕在产水隔网外周，胶线打在于端盖相对应的位置能够通过粘胶使得膜片与端盖实现密封连接。
利用该碳质中心管制备卷式膜时，其卷膜示意图如图5所示。
卷式膜片201a均匀分布在碳质中心管靠近两端的端盖位置，产水隔网203a，产水隔网203a和卷式膜片201a重叠摆放，胶线打在靠近卷式膜片201a和产水隔网203a边缘位置但不与边缘重合，需与边缘线保持距离，同时胶线202a需要打在第一端盖101和第二端盖104上，其作用为借助端盖实现卷式膜元件密封，因为若打在碳质中心管上，由于其为多孔结构，不能实现密封。
本公开还提供一种净水系统，其包括前任一项所述的卷式膜组件。
本公开通过将净水机的中心管通过由能允许流体通过的滤材材质制作，能够使得水能够流经该滤材材质制作成的中心管，从而对水形成一级过滤作用，可使得在相对于相关技术中提高过滤效果需要增加滤芯技术的结构而言，能够通过中心管本身便能形成一级过滤的作用，实现了中心管结构功能的集成化、使其不仅能够支撑卷式膜和收集产水还能实现过滤作用，有效地减小了滤芯体积的增加，利于整机体积的有效减小；
本公开可舍弃相关技术中卷式膜使用的塑料件中心管，避免相关技术中卷式膜元件塑料件中心管的使用，可实现一支膜元件具有两级过滤功能；利用碳质中心管，可避免后续再使用口感滤芯，膜元件集精细过滤滤芯和后置口感滤芯两级过滤功能于一体；碳质中心管无肉眼可视大孔，其表面布满结构性微孔，相比于传统塑料件可视大孔的中心管，卷式膜片产水更容易收集。
如图6-9所示，本公开提供一种复合滤芯组件，其包括：
瓶体604和设置在所述瓶体内部的多级滤芯，包括预处理滤芯、精细过滤 滤芯203、和后处理滤芯组；所述后处理滤芯组包括由能透水滤材做成的中心管102；流体依次经过所述预处理滤芯、所述精细过滤滤芯、和所述后处理滤芯组而被过滤；所述瓶体604的底部或顶部设置有进水口701，在所述瓶体604上且与所述进水口位于同一侧的位置还设置有纯水出口703和浓水出口702。
本公开通过将净水机的中心管通过由能透水的滤材材质制作，能够使得水能够流经该滤材材质制作成的中心管，从而对水形成一级过滤作用，可使得在相对于相关技术中提高过滤效果需要增加滤芯技术的结构而言，能够通过中心管本身便能形成一级过滤的作用，实现了中心管结构功能的集成化、使其不仅能够支撑卷式膜和收集产水还能实现过滤作用，有效地减小了滤芯体积的增加，利于整机体积的有效减小。还通过在中心管的内壁径向内侧设置支撑套筒、能够对具有过滤功能的材料起到支撑作用(因为其存在过滤作用、通常其结构强度不足以支撑或支撑强度不够高)，从而提高中心管的牢固固定的作用，为实现长时间过滤作用提供条件。
相关技术中中心管，为塑料件中心管，只在管中央开孔，其它地方为封闭的，由此造成未开孔区域膜片产水需要沿壁流入开孔区域，流径长；而开孔区域膜片，产水直接从膜孔出去，流径短。而用碳棒做中心管，由于其本身表面分布有均匀的结构性微孔结构，因此和碳棒接触的膜片的产水均能及时导出到空腔内。将后置碳棒滤芯做成可缠绕RO膜的结构形式，可实现RO膜和后置滤芯的复合，实现一芯两级净化功能。
支撑卷式膜片的中心管为后置活性炭滤材，减少传统塑料件中心管的使用，可同时发挥支撑和净化功能；精细过滤滤芯不需要单独腔体，其腔体与预处理滤芯的进水腔体共用，减少精细过滤滤芯单独密闭腔体使用；后置超滤具为倒置安装，但其安装腔体内具有足够的排气空间，可避免倒置安装超滤会出现的憋气问题。
在一些实施方式中，所述多级滤芯为五级以上的滤芯，所述预处理滤芯包括第一级预处理滤芯201和第二级预处理滤芯202，所述后处理滤芯组还包括后处理滤芯205；沿着流体的流动方向流体依次经过所述第一级预处理滤芯201、所述第二级预处理滤芯202、所述精细过滤滤芯203、中心管102和所述后处理滤芯205而被过滤。
本公开通过在瓶体内部设置五级以上的滤芯，沿着流体的流动方向流体依 次经过所述第一级预处理滤芯、所述第二级预处理滤芯、所述精细过滤滤芯、所述中心管和所述后处理滤芯而被过滤，一体式复合滤芯，其包含五级滤芯，可单独使用于净水机上发挥净化功能，相比于相关技术中的单级滤芯或者二级、三级甚至四级滤芯而言，在一个瓶体里能够实现五级过滤效果，能够有效提高过滤效果的同时还能使得滤芯组件乃至净水机体积小型化，滤芯集五级过滤功能一体，设计时匹配了各滤芯的寿命，且考虑了体积，所以不会造成体积大，只会比单独滤芯时体积小；
并且通过一个瓶体里设置滤芯，有效集五级过滤功能一体，设计时匹配了各滤芯的寿命，相比于单级滤芯或者二级、三级甚至四级滤芯的瓶体之间的寿命存在不匹配而导致换芯周期不一致的问题、带来换芯频繁的问题而言，更换内部滤芯时瓶体内部的滤芯的使用寿命基本都一致，因此换芯周期一致，一体换芯，有效避免各滤芯单独使用时存在的换芯周期不一致带来的换芯频繁问题。
并且将进水口、纯水出口以及浓水出口等所有水口均设置为在瓶体的一端布局，能有效避免接口两端分布造成的空间占用比大问题。
在一些实施方式中，所述第一级预处理滤芯201的材料为PP棉(在一些实施方式中为喷融pp棉、折纸pp棉等)；和/或，所述第二级预处理滤芯202为烧结碳棒；和/或，所述精细过滤滤芯203为卷式反渗透滤芯或卷式纳滤滤芯；和/或，所述能透水的滤材材质包括：碳材质、聚丙烯pp材质和陶瓷材质中的至少一种；和/或，述中心管102的径向内侧还设置有筒状结构的支撑套筒202b，所述支撑套筒202b上还设置有至少一个通水孔202a；和/或，所述后处理滤芯205的材料为微滤膜和/或超滤膜；和/或，所述后处理滤芯205倒装安装(后处理滤芯包括安装座和中空纤维膜丝，其安装座位于下端，中空纤维膜丝位于上端、其下端与安装座连接、并朝上方延伸伸出)。
其中，第一级预处理滤芯201可为喷融PP棉、折纸pp棉，其作用主要为发挥第一级过滤，去除水体中大的悬浮物、泥沙、铁锈等污染物；第二级预处理滤芯202可为烧结碳棒，其作用主要为吸附去除水体中的余氯、小分子有机物等；精细过滤滤芯203可为卷式反渗透滤芯或卷式纳滤滤芯，其作用为精细过滤，可去除水体中重金属离子、小分子有机物等，实现对水体的深度净化；通过对中心管的滤材材质的在一些实施方式中的材质为碳材质、聚丙烯pp材质和陶瓷材质中的至少一种，能够实现允许水通过并进行过滤。还通过在中心 管的内壁径向内侧设置支撑套筒、能够对具有过滤功能的材料起到支撑作用(因为其存在过滤作用、通常其结构强度不足以支撑或支撑强度不够高)，从而提高中心管的牢固固定的作用，为实现长时间过滤作用提供条件；后处理滤芯205可为微滤膜、超滤膜等，其作用为防止出水微生物超标，保证用水卫生安全。
在一些实施方式中，所述第一级预处理滤芯201和所述第二级预处理滤芯202位于相同高度且内外布置，且所述第一级预处理滤芯201套设于所述第二级预处理滤芯202的外部。这样使得水流通过外部的第一级预处理滤芯净化处理后再进入内部的第二级预处理滤芯中处理，实现精滤前的预处理或粗滤的作用。
在一些实施方式中，所述精细过滤滤芯203位于所述第一级预处理滤芯201或所述第二级预处理滤芯202的下方，且所述中心管102和所述后处理滤芯205被套设于所述精细过滤滤芯203的内部，且所述后处理滤芯205套设于所述中心管102的内部。
滤芯结构的布局形式为：第一级预处理滤芯201包裹或嵌套在第二级预处理滤芯202滤芯外表面，形成内外结构布局；后三级滤芯与前两级预处理滤芯为上下结构布局；中心管102、后处理滤芯205两级后处理滤芯装填在精细过滤滤芯203滤芯中心管内；这样的结构布局能够有效地省去相关技术中采用的内筒体结构，通过多个连接端盖实现对上面两级预处理滤芯进行固定设置，通过多个连接端盖和中心管的布置实现对精细过滤滤芯的固定设置和两级后处理滤芯(包括超滤)的固定设置作用，有效地减小了体积，实现了体积小型化。
在一些实施方式中，所述中心管102的内部具有第六空腔506、所述后处理滤芯205设置于所述第六空腔506中。这是本公开的中心管的在一些实施方式中的结构形式。
在一些实施方式中，所述瓶体604底端设置有纯水出口703，所述后处理滤芯205的下端与所述纯水出口703连通。经过精细过滤滤芯后的水再经过第一级(中心管)和后处理滤芯流出，从底端排出，获得纯水。
在一些实施方式中，所述瓶体604底端还设置有浓水出口702，所述精细过滤滤芯203的下端能与所述浓水出口702进行连通。将精细过滤滤芯过滤出来而未经后两级过滤滤芯的水、通过第九空腔509和浓水出口排出，获得浓水 (含盐量较高、不能引用)。
在一些实施方式中，所述瓶体604的顶端设置有第一连接端盖401、以对所述瓶体604上端进行封闭；和/或，所述第一级预处理滤芯201和所述第二级预处理滤芯202的上端还设置有第二连接端盖402，所述第二连接端盖402被固定设置于所述瓶体604上；和/或，所述第一级预处理滤芯201和所述第二级预处理滤芯202的底端还设置有第三连接端盖403，所述第三连接端盖403外壁上具有筋条形成的过水通道、以允许水流通过(筋条指的是在外壁上向外凸出形成的凸出条状的结构)；
和/或，所述中心管102的上方位置还设置有第一端盖101，所述后处理滤芯205的下端还设置有第二端盖104；和/或，所述精细过滤滤芯203的下端还设置有第六连接端盖406，所述第六连接端盖406外壁上具有筋条形成的过水通道、以允许流体流过。
这是本公开的五个连接端盖的在一些实施方式中的结构形式，通过第一连接端盖能够实现对瓶体上端的封闭和支撑的作用，通过第二连接端盖形成对第一和第二级预处理滤芯上端进行支撑作用，第三连接端盖实现对第一和第二级预处理滤芯的下端的支撑和封闭，第一端盖能够对中心管上端进行支撑作用，第二端盖对后处理滤芯实现支撑，第六连接端盖对精细过滤滤芯实现支撑。
为了成功制备该复合滤芯，其需要包含端盖部分。具体有第一连接端盖401，其为瓶体端盖，与瓶体通过旋熔或螺纹方式连接，作用为瓶体实现密封；第二连接端盖402，其为第一、二级预处理滤芯的上端盖，作用为固定和密封；第三连接端盖403，具体为第一、二级预处理滤芯的下端盖，作用实现对第一、二级滤芯的限位固定，同时实现与精细过滤滤芯203连接，实现水路互通，此外，该端盖侧壁上的限位条同时提供过水通道作用；第一端盖101，其为中心管的上端盖，作用为固定；第二端盖104，其为后处理滤芯的下端盖；第六连接端盖406，其为精细过滤滤芯的下端盖，作用为实现进水水路和精细过滤滤芯水路分开，同时，其端盖上具有限位条，发挥过水通道的作用。
在一些实施方式中，所述精细过滤滤芯203的上部与所述第三连接端盖403的内壁设置有第一密封件301；和/或，所述精细过滤滤芯203的下部与所述第六连接端盖406之间设置有第二密封件302；和/或，所述第六连接端盖406的下端外周壁上设置有第三密封件303；和/或，所述中心管102的下端还设置 有出水接头105，且所述出水接头105的下端外周还设置有第四密封件304。
通过第一密封件实现对精细过滤滤芯上部与瓶体之间的密封、使得水只能精细过滤滤芯向下流出，使水被充分的进行精细过滤处理；通过第二密封件实现精细过滤滤芯下部与第六连接端盖之间的密封，使得精细过滤滤芯出来的水经过中心管、支撑套筒而进入后处理滤芯而被过滤，提高了过滤效果；通过第三密封件能够保证第六连接端盖与中心管底端之间的密封作用，使得精细过滤滤芯出来的水不能从第六连接端盖和中心管之间而泄漏到纯水出口；通过第四密封件能够对纯水出口的水进行密封作用。
为了成功制备该复合滤芯，其需要包括密封件部分。第一密封件301、第二密封件302为盐水密封圈，其作用为实现进水水路与精细过滤滤芯的水路分隔；第三密封件303为第六连接端盖406上的O型圈；第四密封件304为出水接头上实现密封的O型圈。上述所述密封件，其作用均为防止窜水和实现密封。
在一些实施方式中，所述第六连接端盖406底部与所述瓶体604之间具有第一空腔501；和/或，所述精细过滤滤芯203外周与所述瓶体604之间具有第二空腔502；和/或，所述第一级预处理滤芯201的外周与所述瓶体604之间形成第三空腔503；和/或，所述第二级预处理滤芯202的内部具有竖直方向延伸的第四空腔504；和/或，所述第三连接端盖403与所述第二密封件302之间具有第五空腔505；和/或，所述后处理滤芯205的底端与所述中心管102之间形成第七空腔507；和/或，所述精细过滤滤芯203的底部与所述第六连接端盖406之间形成第八空腔508、所述第六连接端盖406下端内壁与所述出水接头105下端外壁之间形成第九空腔509，所述第九空腔509上端与所述第八空腔508连通、下端与所述浓水出口702连通。
为了成功制备该复合滤芯，其需要包括空腔部分。第一空腔501为进水、第六连接端盖406及瓶体604共同组成，为原水进水空腔；第二空腔502为第六连接端盖406、精细过滤滤芯203、第三连接端盖403、第二密封件302、第三密封件303及瓶体604共同组成，为原水进水腔；第三空腔503为第二连接端盖402、第三连接端盖403，瓶体604以及第一、二级预处理滤芯共同组成，为原水进水空腔。其中，第一空腔501、第二空腔502和第三空腔503相通。第四空腔504为第二预处理滤芯空腔，为过滤水出水空腔；第五空腔505与第四空腔504为连通，其为精细过滤滤芯进水空腔；第六空腔506为中心管进水 腔；第七空腔507为中心管出水腔；第八空腔508为精细过滤滤芯浓缩水流出空腔、与第九空腔509相通，从浓水出口流出。
本公开还提供一种净水系统，其包括前任一项所述的复合滤芯组件。本公开通过在瓶体内部设置五级以上的滤芯，沿着流体的流动方向流体依次经过所述第一级预处理滤芯、所述第二级预处理滤芯、所述精细过滤滤芯、所述中心管和所述后处理滤芯而被过滤，一体式复合滤芯，其包含五级滤芯，可单独使用于净水机上发挥净化功能，相比于相关技术中的单级滤芯或者二级、三级甚至四级滤芯而言，在一个瓶体里能够实现五级过滤效果，能够有效提高过滤效果的同时还能使得滤芯组件乃至净水机体积小型化，滤芯集五级过滤功能一体，设计时匹配了各滤芯的寿命，且考虑了体积，所以不会造成体积大，只会比单独滤芯时体积小；
并且通过一个瓶体里设置滤芯，有效集五级过滤功能一体，设计时匹配了各滤芯的寿命，相比于单级滤芯或者二级、三级甚至四级滤芯的瓶体之间的寿命存在不匹配而导致换芯周期不一致的问题、带来换芯频繁的问题而言，更换内部滤芯时瓶体内部的滤芯的使用寿命基本都一致，因此换芯周期一致，一体换芯，有效避免各滤芯单独使用时存在的换芯周期不一致带来的换芯频繁问题。
该复合滤芯，其整体外观如图9所示，其瓶体上具有把手设置，目的为换芯时方便拿取。可预期的，瓶体只为匹配复合滤芯组件的结构，能实现进出水功能、替换功能即可，不限于附图提供的外观。
本公开的复合滤芯，进水、纯水和浓水口一端布局是本公开的一个技术特点。本公开的复合滤芯可替代传统的多级滤芯，使用单独一支的本公开的复合滤芯即可制备出净水设备。本技术公开的滤芯上下、内外结构，以及组件的上下、内外结构为配合实现本一体复合滤芯的方式。
该复合滤芯结构形式同时包含有上下结构、内外结构。其上下结构实现基础为借助端盖分离，但是上下空间为连通空间，其连通通道为端盖侧壁上具有引水槽，该端盖同时为预处理滤芯和精细过滤滤芯的共用端盖，节省空间；其内外结构实现基础为中心管，该中心管区别于传统中心管，具有大空腔特征，可被设置为装填后处理滤芯滤材，同时该中心管上无透水孔，其引水结构为表面上均匀分布的引水槽，可增加产水导出。其水口一端分布，包含加压水进水口、纯水出水口和浓水出水口，接口数少，可有效降低由于接口两端分布造成 的纵向空间占用。其系统原理为水源-泵-预处理-精细过滤滤芯-后处理滤芯，该复合滤芯可被设置为台面式净水机、净饮机等。
为达到上述目的，本公开可通过以下技术方案实现：
1)为了成功制备该复合滤芯，其需要包括多级滤芯。
第一级预处理滤芯201，第二级预处理滤芯202，精细过滤滤芯203，中心管102，后处理滤芯205。其中，第一级预处理滤芯可为喷融PP棉、折纸pp棉，其作用主要为发挥第一级过滤，去除水体中大的悬浮物、泥沙、铁锈等污染物；第二级预处理滤芯可为烧结碳棒，其作用主要为吸附去除水体中的余氯、小分子有机物等；精细过滤滤芯可为卷式反渗透滤芯或卷式纳滤滤芯，其作用为精细过滤，可去除水体中重金属离子、小分子有机物等，实现对水体的深度净化；中心管可为烧结碳棒，其作用为改善精细过滤滤芯产水口感；后处理滤芯可为微滤膜、超滤膜等，其作用为防止出水微生物超标，保证用水卫生安全。对应的，为了成功制备该复合滤芯，滤芯结构的布局形式为：第一级预处理滤芯201包裹或嵌套在第二级预处理滤芯202滤芯外表面，形成内外结构布局；后三级滤芯与前两级预处理滤芯为上下结构布局；两级后处理滤芯装填在精细过滤滤芯中心管内。
2)为了成功制备该复合滤芯，其需要包含端盖部分。
为了成功制备该复合滤芯，其需要包含端盖部分。具体有第一连接端盖401，其为瓶体端盖，与瓶体通过旋熔或螺纹方式连接，作用为瓶体实现密封；第二连接端盖402，其为第一、二级预处理滤芯的上端盖，作用为固定和密封；第三连接端盖403，具体为第一、二级预处理滤芯的下端盖，作用实现对第一、二级滤芯的限位固定，同时实现与精细过滤滤芯203连接，实现水路互通，此外，该端盖侧壁上的限位条同时提供过水通道作用；第一端盖101，其为中心管的上端盖，作用为固定；第二端盖104，其为中心管的下端盖，同时可实现与后处理滤芯的连接；第六连接端盖406，其为精细过滤滤芯的下端盖，作用为实现进水水路和精细过滤滤芯水路分开，同时，其端盖上具有限位条，发挥过水通道的作用。
3)为了成功制备该复合滤芯，其需要包括密封件部分。
第一密封件301为靠经中心管进水端的O型圈，其作用为配合第一端盖101对中心管102空腔实现密封；第二密封件302、第三密封件303为盐水密 封圈，其作用为实现进水水路与精细过滤滤芯的水路分隔；第四密封件304为第二端盖104上的O型圈；第五密封件为第二壳体(即第二后处理瓶体)上实现密封的O型圈；第六密封件为中心管102上实现密封的O型圈；第七密封件为第六连接端盖406上的O型圈。上述所述密封件，其作用均为防止窜水和实现密封。
4)为了成功制备该复合滤芯，其需要包括空腔部分。
第一空腔501为进水、第六连接端盖406及瓶体604共同组成，为原水进水空腔；第二空腔502为第六连接端盖406、精细过滤滤芯203、第三连接端盖403、第二密封件302、第三密封件303及瓶体604共同组成，为原水进水腔；第三空腔503为第二连接端盖402、第三连接端盖403，瓶体604以及第一、二级预处理滤芯共同组成，为原水进水空腔。其中，第一空腔501、第二空腔502和第三空腔503相通。第四空腔504为第二预处理滤芯空腔，为过滤水出水空腔；第五空腔505与第四空腔504为连通，其为精细过滤滤芯进水空腔；第六空腔506为中心管进水腔；第七空腔507为中心管出水腔；第八空腔508为精细过滤滤芯浓缩水流出空腔、与第九空腔509相通，从浓水出口流出。
5)为了成功制备该复合滤芯，其还需要包含图6-7所示的零部件。
瓶体604，其为整个复合滤芯的外瓶体；第二瓶体(即第二后处理瓶体)，为第二后处理滤芯的外瓶体；密封橡胶塞，为滤芯不用时其密封作用。中心管102，所述中心管上无贯通的引水孔，与传统中心管结构不同，其表面发挥引水功能的为引水槽，第一导向槽A开设于中心管表面，其作用为收集精细过滤滤芯产水，第二导向槽A开设于中心管102尾端侧壁上，其作用为将第一导向槽A收集的产水导出，并在第一端盖101的作用下将产水引至第六空腔506；此外，所述中心管空腔内空间可以放置滤材。限位装置，第一限位，与第三连接端盖403一体制备，作用为对精细过滤滤芯203实现定位作用；第二限位与中心管102一体设置，作用为定位后处理滤芯205。
6)为了成功制备该复合滤芯，其需要包含水口，水口一端布局。
第一进水口为原水进水口701，其进水依次经过第一空腔501、第二空腔502和第三空腔503后进入第一级预处理滤芯201；第二进水口为纯水出口703，其前级进水依次经过第六空腔506、第七空腔507、第八空腔508进入纯水出口703；第三出水口为浓水出口702，其前级进水依次经过第四空腔504、第五 空腔505、第九空腔509、第十空腔后进入浓水出口702。
7)该复合滤芯，其整体外观如图9所示，其瓶体上具有把手设置(未示出)，目的为换芯时方便拿取。可预期的，瓶体只为匹配复合滤芯组件的结构，能实现进出水功能、替换功能即可，不限于附图提供的外观。
综上，本领域技术人员容易理解的是，在不冲突的前提下，上述各有利方式可以自由地组合、叠加。
以上所述仅为本公开的实施例而已，并不用于限制本公开，对于本领域的技术人员来说，本公开可以有各种更改和变化。凡在本公开的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本公开的权利要求范围之内。

Claims (31)

  1. 一种用于卷式膜组件的中心管，其中：
    所述中心管(102)为筒体结构，所述筒体结构包括内壁(102d)和外壁(102e)、以及位于所述内壁(102d)内侧的空腔(102f)，且所述中心管(102)由能允许流体通过的滤材材质制成，以允许流体从所述内壁(102d)流通至所述外壁(102e)，或从所述外壁(102e)流通至所述内壁(102d)而到达所述空腔(102f)中。
  2. 根据权利要求1所述的中心管，其中：
    所述能允许流体通过的滤材材质包括：碳材质、聚丙烯pp材质和陶瓷材质中的至少一种。
  3. 根据权利要求2所述的中心管，其中：
    所述中心管(102)为由所述碳材质组成的筒状碳棒结构；或，所述中心管(102)为由所述聚丙烯pp材质组成的筒状PP结构；或，所述中心管(102)为由所述陶瓷材质组成的筒状陶瓷管的结构。
  4. 一种卷式膜组件，其中：
    包括权利要求1-3中任一项所述的用于卷式组件膜的中心管，还包括围绕所述中心管(102)的外周进行绕设的卷式膜(103)、所述卷式膜(103)能够允许水通过并对水进行过滤。
  5. 根据权利要求4所述的卷式膜组件，其中：
    还包括设置在所述中心管(102)的轴向一端的第一端盖(101)、所述第一端盖能对所述中心管(102)的所述轴向一端进行密封；和，
    还包括设置在所述中心管(102)的轴向另一端的第二端盖(104)、所述第二端盖(104)的径向内侧还连接设置有出水接头(105)、以允许所述中心管(102)内部中的水从所述出水接头(105)流出。
  6. 根据权利要求5所述的卷式膜组件，其中：
    所述第一端盖(101)包括位于径向外侧且沿轴向方向延伸的第一延伸臂(101d)以及位于径向内侧且沿轴向方向延伸的第二延伸臂(101e)，所述第一延伸臂(101d)和所述第二延伸臂(101e)之间形成为能对所述中心管(102)的内壁和外壁进行卡设的空间。
  7. 根据权利要求6所述的卷式膜组件，其中：
    所述第二延伸臂(101e)贴合卡设在所述中心管(102)的所述轴向一端的内壁处；所述中心管(102)的外壁在所述轴向一端的位置处还形成有第一台阶(102a)，所述第一延伸臂(101d)与所述第一台阶(102a)卡合、以使得所述第一延伸臂(101d)的外周面与所述中心管(102)的外周面相平齐。
  8. 根据权利要求6所述的卷式膜组件，其中：
    所述第一端盖(101)的中心位置还朝所述中心管(102)的轴向方向形成有用于卷膜的卷膜卡槽(101a)；和，所述第一端盖(101)的所述第一延伸臂(101d)和所述第二延伸臂(101e)之间还沿轴向延伸地设置有第一固定筋条(101b)、所述中心管(102)的所述轴向一端也沿轴向凹陷地设置有固定槽(102c)，所述第一固定筋条(101b)能与所述固定槽(102c)之间形成卡接限位；和，所述第一端盖(101)的与所述第一延伸臂(101d)和所述第二延伸臂(101e)的延伸方向相背的方向还凸出地设置有至少一个第一限位筋条(101c)。
  9. 根据权利要求6所述的卷式膜组件，其中：
    所述第一端盖(101)的中心位置还朝所述中心管(102)的轴向方向形成有用于卷膜的卷膜卡槽(101a)；或，所述第一端盖(101)的所述第一延伸臂(101d)和所述第二延伸臂(101e)之间还沿轴向延伸地设置有第一固定筋条(101b)、所述中心管(102)的所述轴向一端也沿轴向凹陷地设置有固定槽(102c)，所述第一固定筋条(101b)能与所述固定槽(102c)之间形成卡接限位；或，所述第一端盖(101)的与所述第一延伸臂(101d)和所述第二延伸臂(101e)的延伸方向相背的方向还凸出地设置有至少一个第一限位筋条(101c)。
  10. 根据权利要求5所述的卷式膜组件，其中：
    所述第二端盖(104)包括位于径向外侧且沿轴向方向延伸的第三延伸臂(104c)以及位于径向内侧且沿轴向方向延伸的第四延伸臂(104d)，所述第三延伸臂(104c)和所述第四延伸臂(104d)之间形成为能对所述中心管(102)的所述轴向另一端的内壁和外壁进行卡设的空间。
  11. 根据权利要求10所述的卷式膜组件，其中：
    所述第四延伸臂(104d)贴合卡设在所述中心管的所述轴向另一端的内壁 处；和，所述中心管(102)的所述外壁在所述轴向另一端的位置处还形成有第二台阶(102b)，所述第三延伸臂(104c)卡接在所述第二台阶(102b)的外周壁处、以使得所述第三延伸臂(104c)的外周面与所述中心管(102)的外周面相平齐。
  12. 根据权利要求10所述的卷式膜组件，其中：
    所述第二端盖(104)的所述第三延伸臂(104c)和所述第四延伸臂(104d)之间还沿轴向延伸地设置有第二固定筋条(104b)、所述中心管(102)的所述轴向另一端也沿轴向凹陷地设置有固定槽(102c)，所述第二固定筋条(104b)能与所述固定槽(102c)之间形成卡接限位；和，所述第二端盖(104)的所述第四延伸臂(104d)的内侧还沿径向凸出地设置有第二限位筋条(104a)，所述第二限位筋条(104a)能与所述出水接头(105)之间形成限位和定位。
  13. 根据权利要求10所述的卷式膜组件，其中：
    所述第二端盖(104)的所述第三延伸臂(104c)和所述第四延伸臂(104d)之间还沿轴向延伸地设置有第二固定筋条(104b)、所述中心管(102)的所述轴向另一端也沿轴向凹陷地设置有固定槽(102c)，所述第二固定筋条(104b)能与所述固定槽(102c)之间形成卡接限位；或，所述第二端盖(104)的所述第四延伸臂(104d)的内侧还沿径向凸出地设置有第二限位筋条(104a)，所述第二限位筋条(104a)能与所述出水接头(105)之间形成限位或定位。
  14. 根据权利要求6所述的卷式膜组件，其中：
    所述第一端盖(101)与所述中心管(102)之间的相接部位还通过粘接连接；和，所述第二端盖(104)与所述中心管(102)之间的相接部位还通过粘接连接；和，所述卷式膜(103)在所述中心管(102)的所述轴向一端缠绕设置在所述第一端盖(101)的外周处；和，所述卷式膜(103)在所述中心管(102)的所述轴向另一端缠绕设置在所述第二端盖(104)的外周处。
  15. 根据权利要求14所述的卷式膜组件，其中：
    所述卷式膜(103)包括卷式膜片(201a)、胶线(202a)、产水隔网(203a)和进水隔网，所述卷式膜片(201a)包括分离层和非分离层，且所述卷式膜片(201a)在所述分离层处进行对折，所述进水隔网放置于卷式膜片的对折位置中，且所述非分离层的一面和所述产水隔网(203a)之间叠置，且所述胶线(202a)设置在所述卷式膜(103)的内周侧、且与所述第一端盖(101)和所述第二端 盖(104)相对的位置。
  16. 一种复合滤芯组件，其中：包括：
    瓶体(604)和设置在所述瓶体内部的多级滤芯，包括预处理滤芯、精细过滤滤芯(203)、和后处理滤芯组；所述后处理滤芯组包括由能允许流体通过滤材做成的中心管(102)；流体依次经过所述预处理滤芯、所述精细过滤滤芯、和所述后处理滤芯组而被过滤。
  17. 根据权利要求16所述的复合滤芯组件，其中：
    所述瓶体(604)的底部或顶部设置有进水口(701)，在所述瓶体(604)上且与所述进水口位于同一侧的位置还设置有纯水出口(703)和浓水出口(702)。
  18. 根据权利要求17所述的复合滤芯组件，其中：
    所述多级滤芯为五级以上的滤芯，所述预处理滤芯包括第一级预处理滤芯(201)和第二级预处理滤芯(202)，所述后处理滤芯组还包括后处理滤芯(205)；流体依次经过所述第一级预处理滤芯(201)、所述第二级预处理滤芯(202)、所述精细过滤滤芯(203)、所述中心管(102)和所述后处理滤芯(205)而被过滤。
  19. 根据权利要求18所述的复合滤芯组件，其中：
    所述第一级预处理滤芯(201)的材料为PP；和，所述第二级预处理滤芯(202)为烧结碳棒；和，所述精细过滤滤芯(203)为卷式反渗透滤芯或卷式纳滤滤芯；和，所述能允许流体通过的滤材材质包括：碳材质、聚丙烯pp材质和陶瓷材质中的至少一种；和，所述后处理滤芯(205)的材料为微滤膜和超滤膜；和，所述后处理滤芯(205)倒装安装。
  20. 根据权利要求18所述的复合滤芯组件，其中：
    所述第一级预处理滤芯(201)的材料为PP；或，所述第二级预处理滤芯(202)为烧结碳棒；或，所述精细过滤滤芯(203)为卷式反渗透滤芯或卷式纳滤滤芯；或，所述能允许流体通过的滤材材质包括：碳材质、聚丙烯pp材质和陶瓷材质中的至少一种；或，所述后处理滤芯(205)的材料为微滤膜或超滤膜；或，所述后处理滤芯(205)倒装安装。
  21. 根据权利要求17所述的复合滤芯组件，其中：
    所述中心管(102)的径向内侧还设置有筒状结构的支撑套筒(202b)， 所述支撑套筒(202b)上还设置有至少一个通水孔(202a)。
  22. 根据权利要求18所述的复合滤芯组件，其中：
    所述第一级预处理滤芯(201)和所述第二级预处理滤芯(202)位于相同高度且内外布置，且所述第一级预处理滤芯(201)套设于所述第二级预处理滤芯(202)的外部。
  23. 根据权利要求18所述的复合滤芯组件，其中：
    所述精细过滤滤芯(203)位于所述第一级预处理滤芯(201)或所述第二级预处理滤芯(202)的下方，且所述中心管(102)和所述后处理滤芯(205)均被套设于所述精细过滤滤芯(203)的内部，且所述后处理滤芯(205)套设于所述中心管(102)的内部。
  24. 根据权利要求18所述的复合滤芯组件，其中：
    所述中心管(102)的内部具有第六空腔(506)、所述后处理滤芯(205)设置于所述第六空腔(506)中。
  25. 根据权利要求18所述的复合滤芯组件，其中：
    所述纯水出口(703)设置在所述瓶体(604)底端，所述后处理滤芯(205)的下端与所述纯水出口(703)连通；和，
    所述浓水出口(702)设置在所述瓶体(604)底端，所述精细过滤滤芯(203)的下端能与所述浓水出口(702)进行连通。
  26. 根据权利要求18所述的复合滤芯组件，其中：
    所述瓶体(604)的顶端设置有第一连接端盖(401)、以对所述瓶体(604)上端进行封闭；和，所述第一级预处理滤芯(201)和所述第二级预处理滤芯(202)的上端还设置有第二连接端盖(402)，所述第二连接端盖(402)被固定设置于所述瓶体(604)上；和，所述第一级预处理滤芯(201)和所述第二级预处理滤芯(202)的底端还设置有第三连接端盖(403)，所述第三连接端盖(403)外壁上具有筋条形成的过水通道；
    和，所述中心管(102)的上方位置还设置有第一端盖(101)；和，所述后处理滤芯(205)的下端还设置有第二端盖(102)；和，所述精细过滤滤芯(203)的下端还设置有第六连接端盖(406)，所述第六连接端盖(406)外壁上具有筋条形成的过水通道。
  27. 根据权利要求18所述的复合滤芯组件，其中：
    所述瓶体(604)的顶端设置有第一连接端盖(401)、以对所述瓶体(604)上端进行封闭；或，所述第一级预处理滤芯(201)和所述第二级预处理滤芯(202)的上端还设置有第二连接端盖(402)，所述第二连接端盖(402)被固定设置于所述瓶体(604)上；或，所述第一级预处理滤芯(201)和所述第二级预处理滤芯(202)的底端还设置有第三连接端盖(403)，所述第三连接端盖(403)外壁上具有筋条形成的过水通道；
    或，所述中心管(102)的上方位置还设置有第一端盖(101)；或，所述后处理滤芯(205)的下端还设置有第二端盖(102)；或，所述精细过滤滤芯(203)的下端还设置有第六连接端盖(406)，所述第六连接端盖(406)外壁上具有筋条形成的过水通道。
  28. 根据权利要求27所述的复合滤芯组件，其中：
    所述精细过滤滤芯(203)的上部与所述第三连接端盖(403)的内壁设置有第一密封件(301)；和，所述精细过滤滤芯(203)的下部与所述第六连接端盖(406)之间设置有第二密封件(302)；和，所述第六连接端盖(406)的下端外周壁上设置有第三密封件(303)；和，所述中心管(102)的下端还设置有出水接头(105)，且所述出水接头(105)的下端外周还设置有第四密封件(304)。
  29. 根据权利要求28所述的复合滤芯组件，其中：
    所述第六连接端盖(406)底部与所述瓶体(604)之间具有第一空腔(501)；和，所述精细过滤滤芯(203)外周与所述瓶体(604)之间具有第二空腔(502)；和，所述第一级预处理滤芯(201)的外周与所述瓶体(604)之间形成第三空腔(503)；和，所述第二级预处理滤芯(202)的内部具有竖直方向延伸的第四空腔(504)；和，所述第三连接端盖(403)与所述第二密封件(302)之间具有第五空腔(505)；和，所述后处理滤芯(205)的底端与所述中心管(102)之间形成第七空腔(507)；和，所述精细过滤滤芯(203)的底部与所述第六连接端盖(406)之间形成第八空腔(508)、所述第六连接端盖(406)下端内壁与所述出水接头(105)下端外壁之间形成第九空腔(509)，所述第九空腔(509)上端与所述第八空腔(508)连通、下端与所述浓水出口(702)连通。
  30. 根据权利要求28所述的复合滤芯组件，其中：
    所述第六连接端盖(406)底部与所述瓶体(604)之间具有第一空腔(501)；或，所述精细过滤滤芯(203)外周与所述瓶体(604)之间具有第二空腔(502)；或，所述第一级预处理滤芯(201)的外周与所述瓶体(604)之间形成第三空腔(503)；或，所述第二级预处理滤芯(202)的内部具有竖直方向延伸的第四空腔(504)；或，所述第三连接端盖(403)与所述第二密封件(302)之间具有第五空腔(505)；或，所述后处理滤芯(205)的底端与所述中心管(102)之间形成第七空腔(507)；或，所述精细过滤滤芯(203)的底部与所述第六连接端盖(406)之间形成第八空腔(508)、所述第六连接端盖(406)下端内壁与所述出水接头(105)下端外壁之间形成第九空腔(509)，所述第九空腔(509)上端与所述第八空腔(508)连通、下端与所述浓水出口(702)连通。
  31. 一种净水系统，其中：包括权利要求4-15中任一项所述的卷式膜组件、或者包括权利要求16-30中任一项所述的复合滤芯组件。
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