WO2023179012A1 - 一种级段式滤芯、级段式滤芯组件、净水装置和净水系统 - Google Patents

一种级段式滤芯、级段式滤芯组件、净水装置和净水系统 Download PDF

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Publication number
WO2023179012A1
WO2023179012A1 PCT/CN2022/127395 CN2022127395W WO2023179012A1 WO 2023179012 A1 WO2023179012 A1 WO 2023179012A1 CN 2022127395 W CN2022127395 W CN 2022127395W WO 2023179012 A1 WO2023179012 A1 WO 2023179012A1
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WO
WIPO (PCT)
Prior art keywords
filter element
water
filter
post
staged
Prior art date
Application number
PCT/CN2022/127395
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English (en)
French (fr)
Inventor
李友铃
陈宝
安德荣
陈群
符之之
Original Assignee
珠海格力电器股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN202210300368.4A external-priority patent/CN114618200A/zh
Priority claimed from CN202210300359.5A external-priority patent/CN114618213B/zh
Priority claimed from CN202210301840.6A external-priority patent/CN114570077A/zh
Application filed by 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Publication of WO2023179012A1 publication Critical patent/WO2023179012A1/zh

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J31/00—Apparatus for making beverages
    • A47J31/44—Parts or details or accessories of beverage-making apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/11—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with bag, cage, hose, tube, sleeve or like filtering elements
    • B01D29/13—Supported filter elements
    • B01D29/15—Supported filter elements arranged for inward flow filtration
    • B01D29/21—Supported filter elements arranged for inward flow filtration with corrugated, folded or wound sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/92—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging filtrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/88—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices
    • B01D29/94—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor having feed or discharge devices for discharging the filter cake, e.g. chutes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • 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

Definitions

  • the present disclosure belongs to the field of water purification technology, and specifically relates to a staged filter element, a staged filter element assembly, a water purification device and a water purification system.
  • the core component of the water purifier is the filter element, of which the fine filtration filter element plays the main purification effect.
  • the fine filtration filter elements used in existing water purifiers mainly include rolled reverse osmosis and rolled nanofiltration membrane filter elements, both of which are The rolled diaphragm is rolled on the central tube using a glue-making process to achieve a single-stage high-precision filtration function.
  • existing technical means include adding a chemical anti-scaling filter element before the fine filtration filter element to effectively inhibit the scaling tendency of divalent ions and thus increase the water production rate; it also includes using two fine filtration filter elements in series. , the concentrated water from the previous filter element is used as the raw water for the second filter element to achieve a high water production rate.
  • the above two methods have good results in achieving purified water production rate, but they also have corresponding problems. They are that the release of chemical anti-scaling substances affects water quality and safety, and the use of multiple filter elements in series is not conducive to the volume control of the whole machine.
  • the water purified by the fine filter element is generally weakly acidic.
  • a carbon filter element needs to be connected in series to improve the taste.
  • the problem caused by the series filter element is that the design complexity of the whole machine is increased, and it is not conducive to the volume control of the whole machine.
  • High water production rate is the development trend of water purifiers. Its realization methods mainly include adding chemical scale inhibitors and multiple filter elements connected in series to form staged filtration. However, although both of the above technologies can achieve high recovery rates, they have the following problems:
  • the staged filter element technology has good application prospects.
  • the series connection of multiple filter elements results in a large volume. If the staged filtering function is realized on the same central tube, then It can effectively utilize the characteristics of staged filtration technology and at the same time solve the volume problem caused by multiple filter elements.
  • an immediate problem is that if the same central tube realizes the staged filtration function, the central tube will inevitably be used in sections, which will reduce the effective flow channel length of the filter element and affect the service life of the filter element.
  • this disclosure researches and designs a staged filter element, staged filter element assembly, water purification device and water purification device. system.
  • the technical problem to be solved by the present disclosure is to overcome the shortcomings of the traditional filter element assembly in the related art that it is unable to increase the recovery rate and reduce the volume at the same time, thereby providing a segmented filter element, a segmented filter element assembly, and a purifier. Water fixtures and water purification systems.
  • staged filter element which includes:
  • a first filter element, a second filter element and a support member can support the first filter element and the second filter element at the same time.
  • Raw water can be filtered through the first filter element and filtered out through the first filter element.
  • the pure water can enter the inside of the support member and be discharged along the support member.
  • the concentrated water filtered out by the first filter element can reach the second filter element for filtration, and is filtered by the second filter element.
  • the purified water can also enter the inside of the support member and be discharged along the support member, and the concentrated water filtered by the second filter element can pass through the concentrated water outlet and be discharged.
  • the support member is a structure of a central tube.
  • the central tube is a cylindrical tube with a hollow cavity.
  • the tube wall is provided with a flow guide hole penetrating the inner and outer walls.
  • the flow guide hole includes The first guide hole is opposite to the position of the first filter element and the second guide hole is opposite to the position of the second filter element.
  • the pure water filtered by the first filter element can pass through the first guide hole.
  • the flow hole enters the inside of the central tube, and the pure water filtered out by the second filter element can enter the inside of the central tube through the first guide hole.
  • the central tube includes a first shaft section, a second shaft section and a third shaft section in sequence along its axial direction, the first guide hole is opened on the first shaft section, and the third shaft section A second guide hole is provided on the three-axis section, and no guide hole is provided on the second shaft section.
  • the first filter element is wrapped around the outer circumference of the first shaft section, and the second filter element is wrapped around the outer circumference of the first shaft section. The outer circumference of the triaxial segment.
  • the central tube is an injection molded part; the first filter element and the second filter element are spaced apart, and a first water sealing part is provided at the spaced location, and the first water sealing part is connected to the first water sealing part.
  • the second shaft segment is opposite; and/or,
  • the axial length of the first shaft section is D1
  • the axial length of the second shaft section is D2
  • the axial length of the third shaft section is D3
  • D1:D2 1 ⁇ 2.5.
  • the central tube is arranged with its central axis along a vertical direction, the first filter element is located above the second filter element, and the first shaft section, the second shaft section and the The third shaft segments are connected in sequence from top to bottom, the upper end of the central tube is a closed end, and raw water enters the first filter element through the top of the first filter element.
  • the lower end of the central tube is an open end, forming a pure water outlet
  • the lower end of the second filter element is provided with a second water sealing member, and the second water sealing member can seal water
  • the lower end of the second water sealing member is provided with the concentrated water outlet.
  • the central tube further includes a fourth shaft segment and a fifth shaft segment, the fifth shaft segment is also provided with a third guide hole, and the staged filter element further includes a third filter element,
  • the first filter element is wound around the outer periphery of the first shaft section.
  • the concentrated water filtered through the second filter element can reach the third filter element for filtration, and the pure water filtered out through the third filter element can also be filtered. It can enter the interior of the central tube and be discharged along the central tube, and the concentrated water filtered through the third filter element can pass through the concentrated water outlet and be discharged.
  • the support member includes an end cap assembly, a first post-filter element, and a second post-filter element.
  • the first post-filter element has a first hollow cavity inside, and the second post-filter element There is a second hollow cavity inside, the first post-filter element is opposite to the first filter element, and the pure water filtered out by the first filter element can be further filtered by the first post-filter element and enter the In the first hollow cavity, the pure water filtered out by the second filter element can be further filtered by the second post-filter element and enter the second hollow cavity.
  • the first hollow cavity and the The second hollow cavity is connected.
  • the end cap assembly includes a first end cap, a second end cap and a third end cap.
  • the first end cap is connected to the first rear filter element and is connected with the second end cap.
  • the opposite axial end of the rear filter element, the second end cap is connected and arranged between the first rear filter element and the second rear filter element, and the third end cap is connected and arranged between the second rear filter element and the first rear filter element.
  • the first filter element is wrapped around the outer periphery of the first post-filter element
  • the second filter element is wrapped around the outer periphery of the second post-filter element
  • the first filter element is connected to the second post-filter element.
  • the filter elements are arranged at intervals, and first water-sealing parts are provided at intervals, and the first water-sealing parts are opposite to the second end cap.
  • the first post-filter element is located above the second post-filter element, and the central axis of the first post-filter element coincides with the second post-filter element and extends in a vertical direction;
  • the first end cap, the second end cap and the third end cap are arranged at intervals from top to bottom;
  • the upper end of the first end cap is a closed end, and raw water enters the first filter element through the top of the first filter element;
  • the lower end of the third end cap is an open end and is formed as a pure water outlet.
  • the lower end of the second filter element is provided with a second water sealing member.
  • the second water sealing member can seal water
  • the third water sealing member is capable of sealing water.
  • the concentrated water outlet is formed between the two water sealing parts and the third end cap.
  • the first end cap, the second end cap and the third end cap are all injection molded parts; the first post-filter element and the second post-filter element are all made of microporous
  • the microporous filter material has a pore size of 0.02 to 15 ⁇ m.
  • the microporous filter material includes at least one of activated carbon and ceramics.
  • one axial end of the first post-filter element is bonded to the first end cap, and the other axial end of the first post-filter element is bonded to the second end cap;
  • One axial end of the second post-filter element is bonded to the second end cap, and the other axial end of the second post-filter element is bonded to the third end cap;
  • the outer diameter of the first post-filter element is less than or equal to the outer diameter of the first end cap, and the outer diameter of the first post-filter element is also less than or equal to the outer diameter of the second end cap;
  • the outer diameter of the second post-filter element is less than or equal to the outer diameter of the second end cap, and the outer diameter of the second post-filter element is also less than or equal to the outer diameter of the third end cap.
  • staged filter element assembly which includes the staged filter element described in the previous item, and also includes:
  • the filter bottle body and the filter bottle cap, the filter bottle body and the filter bottle cap together form an internal cavity, and the first filter element, the second filter element and the support member are all arranged in the internal cavity. middle.
  • the filter bottle cap is provided on the upper end of the filter bottle body:
  • the lower end of the filter bottle body is provided with a raw water inlet, the lower end of the support member forms a pure water outlet, and a concentrated water outlet is provided between the lower end of the filter bottle body and the support member; or, on the cover of the filter bottle A raw water inlet is provided, the lower end of the support member forms a pure water outlet, and a concentrated water outlet is provided between the lower end of the filter bottle body and the support member.
  • a first gap channel through which water can flow is formed between the upper end of the first filter element and the filter bottle cap, and a first gap channel through which water can flow is formed between the outer periphery of the first filter element and the filter bottle body.
  • a second interstitial flow channel is formed between the outer periphery of the second filter element and the filter bottle body, and a third interstitial flow channel capable of flowing water is formed between the outer circumference of the second filter element and the filter bottle body.
  • the lower end of the second filter element when the lower end of the filter bottle body is provided with a raw water inlet, the lower end of the second filter element is also provided with a first water sealing member, and the first water sealing member can seal the second filter element
  • the lower end of the structure is sealed, and the first water sealing member is provided with an opening to form a first outlet, which allows the concentrated water filtered by the second filter element to flow downward through the first water sealing member to the The concentrated water outlet is discharged;
  • a second water sealing member is provided at the outer circumferential position between the axial direction of the first filter element and the second filter element to separate the raw water on the outer periphery of the second water sealing member and the second water sealing member.
  • the concentrated water in the inner periphery is sealed;
  • a first water sealing member is also provided at the lower end of the second filter element, and the first water sealing member can seal the lower end of the second filter element. Part of the structure is sealed, and an opening is provided on the first water sealing member to form a first outlet, which allows the concentrated water filtered by the second filter element to flow downward to the concentrated water outlet through the first outlet. and discharge; a second water sealing member is also provided between the outer periphery of the first filter element and the filter bottle body to seal the raw water above the second water sealing member.
  • the present disclosure also provides a water purification device, which includes the step-type filter element described in the previous item or the step-type filter element assembly mentioned in the previous item.
  • the present disclosure provides a water purification system including a staged filter element, which includes:
  • a segmented filter element, a pretreatment filter element and a post-treatment filter element includes a first filter element, a second filter element and a supporting member.
  • the segmented filter element also includes a raw water inlet, a pure water outlet and a concentrated water outlet.
  • the water outlet of the pretreatment filter element can be connected to the raw water inlet, and the water inlet of the post-treatment filter element can be connected to the pure water outlet;
  • the support member can support the first filter element and the second filter element at the same time
  • Raw water can be filtered through the first filter element, pure water filtered through the first filter element can enter the inside of the support member and be discharged along the support member, and concentrated water filtered out through the first filter element can It can reach the second filter element for filtration.
  • the pure water filtered through the second filter element can enter the inside of the support member and be discharged along the support member.
  • the concentrated water filtered through the second filter element can Water can pass through the concentrated water outlet and be discharged;
  • the water outlet of the pretreatment filter element can be connected to the raw water inlet through a first pipeline, and the water inlet of the post-treatment filter element can be connected to the pure water outlet through a second pipeline.
  • a filter element housing is further included, and the raw water inlet, the pure water outlet and the concentrated water outlet are all arranged at the axial first end of the filter element housing; or, the raw water inlet is arranged at the The axial first end of the filter element housing, the pure water outlet and the concentrated water outlet are both located at the axial second end of the filter element housing.
  • the first filter element, the second filter element and the support member are all provided in the same filter element housing;
  • the second filter element is located at one axial end of the first filter element.
  • the second filter element is disposed close to the raw water inlet relative to the first filter element.
  • the support member is located at both the first filter element and the Radially inner side of the second filter element.
  • the raw water inlet, the pure water outlet and the concentrated water outlet are all provided at the upper end of the filter element housing; the first filter element is located below the second filter element, and the first filter element is located below the second filter element.
  • a first gap flow channel for water supply is formed between the lower end of the filter element and the filter element shell.
  • a second gap flow channel for water supply is formed between the outer periphery of the first filter element and the filter element shell.
  • the second gap flow channel is formed between the lower end of the filter element and the filter element shell.
  • a third gap channel through which water can flow is formed between the outer periphery of the filter element and the filter element shell, and a fourth gap channel through which water can flow is formed between the upper end of the second filter element and the filter element shell.
  • the upper end of the second filter element is further provided with a first water sealing member, and the first water sealing member can seal part of the structure of the upper end of the second filter element; the first filter element and A second water sealing member is provided at an outer peripheral position between the axial directions of the second filter element to seal the raw water on the outer periphery of the second water sealing member and the concentrated water on the inner periphery of the second water sealing member.
  • a third water sealing member is provided at the lower end of the first filter element.
  • the third water sealing member can seal part of the structure of the lower end of the first filter element.
  • An opening is provided on the top to form a first inlet, which can allow water under the first filter element to flow upward into the first filter element through the first inlet.
  • a fourth water sealing member is disposed between the upper end of the first filter element and the lower end of the second filter element.
  • the fourth water sealing member can seal part of the upper end of the first filter element.
  • the structure is sealed, and an opening is provided on the fourth water sealing member to form a second inlet, which allows the concentrated water filtered by the first filter element to flow upward into the second filter element through the second inlet;
  • An opening is provided on the first water sealing member to form a third outlet, which allows the concentrated water filtered by the second filter element to flow upward through the third outlet to the concentrated water outlet and be discharged.
  • the first inlet is disposed radially inward relative to the second inlet, and the third outlet is disposed radially inward relative to the second inlet; or the first inlet is opposite
  • the second inlet is disposed close to the radial outer side, and the third outlet is disposed close to the radial outer side relative to the second inlet.
  • it also includes a third pipeline, a fourth pipeline and a fifth pipeline, as well as a pump and a wastewater valve.
  • One end of the third pipeline is connected to the inlet of the pretreatment filter element to pass into the raw water.
  • one end of the fourth pipeline is connected to the concentrated water outlet to export concentrated water or concentrated water
  • one end of the fifth pipeline is connected to the outlet of the post-treatment filter element to export pure water
  • the fourth pipeline The wastewater valve is provided on the pipeline.
  • a staged filter element, staged filter element assembly, water purification device and water purification system provided by the present disclosure have the following beneficial effects:
  • first and second filter elements are provided on the same support member.
  • the pure water filtered by the first filter element is discharged from the pure water outlet, and the filtered concentrated water (impurity water) enters the second filter element for filtration, forming at least One-stage and two-stage filtration, compared to the staged filtration technology of multiple fine filter elements connected in series, can realize the staged filter element filtration function on the same central pipe, which can improve the recycling rate of waste water.
  • Each existing filter element requires a membrane shell, so the series filter element requires multiple membrane shells.
  • the present disclosure can effectively save the volume of membrane shells, etc., and ultimately can increase the recovery rate while reducing the volume, effectively solving the problem.
  • the volume has an important promoting effect; compared with the use of anti-scaling agents to achieve high recovery rate filter technology (through one stage and two stages (at least two stages), there is no need to use anti-scaling agents), the stage-type filter element technology does not have anti-scaling agents Hygiene and safety issues caused by the release of scale substances.
  • This disclosure implements staged filter element filtration technology on the same central tube, eliminating the use of multiple filter bottles in series with filter elements, enabling integrated filter element design, which plays an important role in reducing the volume of the filter element and the entire machine;
  • the present disclosure also arranges the support member including an end cover assembly and two rear filter elements to ensure that the fine filtration filter element can exert its staged filtration function to improve the water purification rate, and can also be integrated with the rear taste filter element.
  • Optimizing the integration of the filter element and reducing the number of filter bottles is conducive to the small-volume design of the whole machine; the integration of the fine filter element and the post-taste filter element is conducive to the small-volume design of the whole machine.
  • this disclosure realizes the staged filtration function on the same central tube without reducing the effective flow channel length of the filter element, thereby achieving high water production rate while effectively ensuring the service life of the filter element.
  • Figure 1 is a schematic structural diagram of a traditional center tube in related technology
  • Figure 2 is a schematic structural diagram of the central tube (pure injection molded part) of the first-stage two-stage filter element according to the first embodiment of the present disclosure (Embodiment 1);
  • Figure 3 is a schematic structural diagram of the central tube (injection molding + filter material combination) of the first-stage two-stage filter element according to the first embodiment of the present disclosure (Embodiment 2);
  • FIG 4 is a schematic structural diagram of the cooperation between the central tube and the filter element in Figure 2 of the present disclosure (Embodiment 1);
  • FIG 5 is a schematic structural diagram of the cooperation between the central tube and the filter element in Figure 3 of the present disclosure (Embodiment 2);
  • Figure 6 is a schematic structural diagram of the central tube (injection molded part) of the first-stage three-stage filter element according to the first embodiment of the present disclosure (Embodiment 3).
  • Figure 7 is a schematic structural diagram of Example 4 of the staged filter element assembly according to the second embodiment of the present disclosure.
  • Figure 8 is a schematic structural diagram of Example 5 of the staged filter element assembly according to the second embodiment of the present disclosure.
  • Figure 9 is a structural diagram of the segmented filter element according to the second embodiment of the present disclosure when the gluing line is unfolded;
  • Figure 10 is a mold modification structural diagram of the staged filter element according to the second embodiment of the present disclosure.
  • Figure 11 is a structural diagram of the glue application method of the one-stage and three-stage stage filter element according to the second embodiment of the present disclosure
  • Figure 12 is a schematic structural diagram of the one-stage three-stage filter element after mold modification according to the second embodiment of the present disclosure (Embodiment 6;
  • Figure 13 is a schematic structural diagram of the cooperation between the central tube (pure injection molded part) and the filter element according to the second embodiment of the present disclosure
  • Figure 14 is a schematic structural diagram of the center tube (injection molded part + filter material combination) and the filter element in the second embodiment of the present disclosure
  • Figure 15 is a schematic structural diagram of the central tube (pure injection molded part) of the first-stage two-stage filter element according to the second embodiment of the present disclosure.
  • Figure 16 is a schematic diagram of a water purification system (short channel stage filter element) including an axial one-stage and two-stage filter element according to the third embodiment of the present disclosure
  • Figure 17 is a schematic diagram of a water purification system (long flow channel stage filter element) including an axial one-stage and two-stage filter element according to the third embodiment of the present disclosure
  • Figure 18 is a schematic structural diagram of a short flow channel segmented filter element according to the third embodiment of the present disclosure.
  • Figure 19 is a schematic structural diagram of a long flow channel segmented filter element according to the third embodiment of the present disclosure.
  • Figure 20 is a schematic structural diagram of the central tube (pure injection molded part) of the first-stage two-stage filter element according to the third embodiment of the present disclosure (Embodiment 7);
  • Figure 21 is a schematic structural diagram of the central tube (injection molding + filter material combination) of the first-stage two-stage filter element according to the third embodiment of the present disclosure (Embodiment 8);
  • Figure 22 is a schematic structural diagram of the cooperation between the central tube and the filter element in Figure 20 of the present disclosure (Embodiment 7);
  • Figure 23 is a schematic structural diagram of the cooperation between the central tube and the filter element in Figure 20 of the present disclosure (Embodiment 8);
  • Figure 24 is a schematic structural diagram of the central tube (injection molded part) of the primary three-stage filter element according to the third embodiment of the present disclosure (Embodiment 9).
  • 3a Raw water inlet hole of central pipe; 71a. First outlet; 73. First glue line; 74. Second glue line; 9. End cover assembly; 91. First end cover; 92. Second end cover; 93. Third end cap; 12. Filter bottle body; 13. Filter bottle cap; 14. Water inlet screen; 15a, blade one; 15b, blade two; 15c, blade three; 15d, blade four; 16a, point one; 16b , point two; 16c, point three; 16d, point four; 17, gap; 101, first gap flow channel; 102, second gap flow channel; 103, third gap flow channel; 104, fourth gap flow channel;
  • staged filter element which includes:
  • the support member can support the first filter element 1 and the second filter element 2 at the same time.
  • Raw water can be filtered through the first filter element 1 and through the
  • the pure water filtered by the first filter element 1 can enter the inside of the support member and be discharged along the support member, and the concentrated water filtered by the first filter element 1 can reach the second filter element 2 for filtration.
  • the pure water filtered through the second filter element 2 can also enter the inside of the support member and be discharged along the support member, and the concentrated water filtered through the second filter element 2 can pass through the concentrated water outlet 4 and be discharged.
  • first and second filter elements are arranged on the same support member.
  • the pure water filtered by the first filter element is discharged from the pure water outlet, and the filtered concentrated water (impurity water) enters the second filter element for filtration, forming at least one level.
  • Two-stage filtration compared with the staged filtration technology of multiple fine filter elements connected in series, can realize the staged filter element filtration function on the same central pipe, which can improve the recycling rate of waste water. Due to the existing Each filter element requires a membrane shell, so the series filter element requires multiple membrane shells.
  • the present disclosure can effectively save the volume of membrane shells, etc., and ultimately can increase the recovery rate while reducing the volume, effectively solving the problem of multiple
  • the volume control problem of the whole machine caused by the series connection of filter elements compared with the use of anti-scaling agents to achieve high recovery rate filter element technology (through one stage and two stages (at least two stages), without using anti-scaling agents), the stage-type filter element technology
  • This disclosure uses the filter element glueing process design and combined with the post-film repair process to achieve one-stage and two-stage rolled membrane filter element stage filtration technology in the same central tube. Compared with the existing single-stage filter element filtration, it has the characteristics of high water production rate. Compared with the segmented filter element technology where multiple filter elements are connected in series, the integrated design can promote the reduction of the volume of the filter element and the volume of the corresponding model.
  • One-stage two-stage explanation It contains two parts of filter elements. The filtration accuracy of these two parts of filter elements is the same, so it is called first-stage.
  • the first part of the filter element produces concentrated water, which is called one stage.
  • the concentrated water in the first part enters the second part of the filter element as raw water. , which also produces concentrated water, is called the second section. In general, it is one level and two sections.
  • Segment corresponds to the number of times concentrated water is generated
  • Rolled membrane filter elements are all flat membranes that are wound and rolled on a central tube with holes through the action of glue, tape, etc.
  • the central tube used in the traditional single-stage fine filtration filter element is shown in Figure 1. Its material is generally an injection molded part.
  • the central tube is cylindrical and has a through-hole pure water diversion hole.
  • the pure water diversion hole is generally evenly divided. Distribution; in addition, in the axial direction, one end of the central tube is closed to separate the collected pure water from other water; the other end is open and is configured to guide the collected pure water out.
  • the support member is a structure of a central tube 5.
  • the central tube 5 is a cylindrical tube with a hollow cavity, and is provided with a A guide hole penetrating through the inner and outer walls, the guide hole including a first guide hole 61 opposite to the position of the first filter element 1 and a second guide hole 62 opposite to the position of the second filter element 2,
  • the pure water filtered through the first filter element 1 can enter the interior of the central tube 5 through the first guide hole 61
  • the pure water filtered out through the second filter element 2 can pass through the second guide hole 61 .
  • the flow hole 62 enters the interior of the central tube 5 .
  • the support member is specifically configured as a central tube structure (the whole is an injection molded part), which can effectively support the first and second filter elements. , it can also effectively introduce the pure water filtered by the first filter element into the internal cavity of the central tube through the first diversion hole opened on it, and export the pure water, and the second diversion hole can effectively filter out the second filter element.
  • the pure water is introduced into the internal cavity of the central tube and exported, while the impurity water (concentrated water) filtered out by the first filter element enters the second filter element for filtration, which can effectively improve the filtration effect of concentrated water and improve the wastewater recovery rate, thus The water production is increased while the volume is reduced, making the structure more compact.
  • Figure 4 is a schematic diagram of the water path structure of the filter element based on the one-stage and two-stage central tube of the injection molded part shown in Figure 2. It only has the function of one-stage and two-stage purification of the same central tube to increase the water production rate.
  • the specific composition includes a central tube, a first filter element 1, a second filter element 2, and a first water sealing member 71 and a second water sealing member 72. Among them, the raw water enters from the end face of the first filter element 1 near the tail end of the central tube, the pure water is collected into the central tube through the diversion hole, and the concentrated water is used as the raw water of the second filter element 2 and enters from the concentrated water end of the first filter element 1.
  • the pure water After being collected through the diversion hole, it is combined with the pure water of the first filter element 1 and discharged from the pure water port, while the concentrated water is discharged from the end face.
  • the function of the first water sealing part 71 is to separate the raw water (the outer circumference is raw water) and the concentrated water of the first filter element 1
  • the function of the second water sealing part 72 is to separate the concentrated water and raw water of the second filter element 2 ( The outer circumference is surrounded by raw water) separated.
  • the central tube 5 sequentially includes a first shaft section 51 , a second shaft section 52 and a third shaft section 53 along its axial direction.
  • the first shaft section 51 is provided with the first flow guide. hole 61
  • the third shaft section 53 is provided with a second guide hole 62
  • the second shaft section 52 is not provided with a guide hole
  • the first filter element 1 is wound around the outer circumference of the first shaft section 51
  • the second filter element 2 is wound around the outer circumference of the third shaft section 53 .
  • the central tube of the present disclosure is provided with first, second and third shaft sections along the axial direction.
  • a first guide hole is opened on the first shaft section, and the first filter element is wound around the outer circumference of the first shaft section, so that the first shaft section can be
  • the pure water filtered by the filter element is introduced into the internal cavity of the central tube through the first guide hole.
  • a second guide hole is opened on the third shaft section.
  • the second filter element is wound around the outer periphery of the third shaft section to filter the second filter element.
  • the pure water that comes out is introduced into the internal cavity of the central tube through the second guide hole.
  • a distance of D2 i.e. the second axis section
  • the purpose is to form two parts of the filter element during film repair.
  • the upper end starting surface of D2 is the end surface of the first filter element close to the second filter element
  • the termination surface is the end surface of the second filter element close to the first filter element.
  • the central tube 5 is an injection molded part; the first filter element 1 and the second filter element 2 are spaced apart, and a first water sealing member 71 is provided at the spaced location.
  • the water member 71 is opposite to the second shaft section 52; and/or,
  • the axial length of the first shaft section 51 is D1
  • the axial length of the second shaft section 52 is D2
  • the axial length of the third shaft section 53 is D3
  • D1:D2 1 ⁇ 2.5.
  • the central tube of Embodiment 1 of the present disclosure is an integral injection molded part (specifically implemented as an integral plastic injection molding), which can effectively support the inner circumference of the filter element and also guide pure water; the first water seal
  • the components are configured to effectively isolate and separate the concentrated water inside the filter element and the raw water on the outside to prevent the two from mixing.
  • a central tube capable of realizing one-stage and two-stage functions is taken as an example for explanation.
  • Figure 2 is a structure that can realize a one-stage two-section central tube. Compared with the traditional central tube in Figure 1, its pure water diversion hole is divided into two parts, specifically the first pure water diversion hole (the first pure water diversion hole). 61) and the second pure water guide hole (second guide hole 62).
  • the first guide hole 61 is set to collect the pure water generated by the first filter element, and its position is distributed in the D1 area; the second guide hole 62 It is set to collect the pure water produced by the second filter element, and its location is distributed in the D3 area.
  • the central tube 5 is arranged with its central axis along the vertical direction, the first filter element 1 is located above the second filter element 2, the first shaft section 51, the second The shaft section 52 and the third shaft section 53 are connected in sequence from top to bottom.
  • the upper end of the central tube 5 is a closed end.
  • Raw water enters the first filter element through the top of the first filter element 1 (raw water inlet 3). 1 in.
  • the central tube arranged along the vertical direction of the central axis forms the first, second and third shaft segments from top to bottom.
  • the first filter element and the second filter element are also formed from top to bottom.
  • the upper end of the central tube is closed to prevent raw water from entering the inside of the central tube.
  • the raw water inlet is above the first filter element.
  • the raw water enters the first filter element for filtering, and the filtered pure water enters through the first diversion hole.
  • the interior of the central tube is
  • the lower end of the central tube 5 is an open end, forming a pure water outlet 8.
  • the lower end of the second filter element 2 is provided with a second water sealing member 72, and the second water sealing member 72 can The water is sealed, and the concentrated water outlet 4 is provided at the lower end of the second water sealing member 72 .
  • the lower end of the central tube of the present disclosure is an open end, which can effectively form a pure water outlet to effectively lead out the pure water in the central tube.
  • the present disclosure can also seal and separate the lower end of the second filter element through the second water sealing member, and the third A concentrated water outlet is formed between the lower end of the second water sealing member and the central tube to effectively lead out the impurity water filtered by the second filter element.
  • the central tube 5 further includes a fourth shaft segment 54 and a fifth shaft segment 55.
  • the fifth shaft segment 55 is also provided with a third guide hole 63.
  • the stage The segmented filter element also includes a third filter element.
  • the first filter element 1 is wound around the outer circumference of the first shaft section 51.
  • the concentrated water filtered out by the second filter element 2 can reach the third filter element for filtration.
  • the pure water filtered through the third filter element can also enter the interior of the central tube and be discharged along the central tube, and the concentrated water filtered through the third filter element can pass through the concentrated water outlet 4 and be discharged along the central tube. be discharged.
  • Embodiment 3 of the present disclosure is arranged in five shaft segments in the axial direction, and has three parts of guide holes at the beginning, which can realize one-stage and multi-stage purification.
  • the position of pure water diversion holes is opened according to the needs of the staged filter element, and it can also achieve one-stage multi-stage purification function.
  • the support member includes an end cover assembly 9, a first post-filter element 10 and a second post-filter element 11.
  • the interior of the first post-filter element 10 There is a first hollow cavity, and the second post-filter element 11 has a second hollow cavity inside.
  • the first post-filter element 10 is opposite to the first filter element 1.
  • the first filter element 1 filters out The pure water can be further filtered by the first post-filter element 10 and enter the first hollow cavity, and the pure water filtered by the second filter element 2 can be further filtered by the second post-filter element 11 And enters the second hollow cavity, the first hollow cavity is connected with the second hollow cavity.
  • the present disclosure also arranges the support member including an end cover assembly and two rear filter elements to ensure that the fine filtration filter element can exert its staged filtration function to improve the water purification rate, and can also be integrated with the rear taste filter element.
  • Optimizing the integration of the filter element and reducing the number of filter bottles is conducive to the small-volume design of the whole machine; the integration of the fine filter element and the post-taste filter element is conducive to the small-volume design of the whole machine.
  • Figure 5 is a schematic diagram of the water path structure of the filter element based on the one-stage and two-stage central tube of the injection molded part shown in Figure 3. It also has the same central tube to achieve one-stage and two-stage purification functions, improve the water production rate, and can be closely connected with the post-filter element. Fitted to achieve two-stage purification functions in one filter element assembly. Its structure is basically the same as the filter element shown in Figure 4. The difference is that the central tube is composed of an injection molded part and a microporous filter material. It can achieve one-stage and two-stage purification to increase the water production rate, and at the same time, it can achieve the original water production of the fine filtration filter element. position purification, realizing a two-in-one filter element structure.
  • the end cap assembly 9 includes a first end cap 91 , a second end cap 92 and a third end cap 93 , and the first end cap 91 is connected to the first post-filter element 10 And at the axial end opposite to the second post-filter element 11, the second end cap 92 is connected and disposed between the first post-filter element 10 and the second post-filter element 11.
  • the three-end cap 93 is connected to an axial end provided on the second post-filter element 11 and opposite to the first post-filter element 10 .
  • the central tube shown in Figure 3 can realize one-stage and two-stage functions.
  • its composition is composed of injection molded parts and filter media. It can realize the purpose of high water production rate in one-stage and two-stage fine filtration filters. At the same time It can be combined with the post-filter element of the fine filter element in situ to form a segmented filter element with two-stage filtration function.
  • the specific composition includes a first end cover 91 , a second end cover 92 and a third end cover 93 , as well as a first post-filter element 10 and a second post-filter element 11 .
  • the outer outer diameter and the effective inner diameter of the three end caps are the same to facilitate the production of the initial filter element; the first end cap 91 is sealed at one end for the purpose of realizing waterway separation; the two ends of the second end cap 92 are connected for the purpose In order to achieve waterway conduction, the third end cap 93 is also connected at both ends for the purpose of draining the collected pure water. At the same time, its outer surface close to the water outlet end has a sealing groove feature to achieve waterway separation.
  • the first filter element 1 is wrapped around the outer periphery of the first post-filter element 10
  • the second filter element 2 is wrapped around the outer periphery of the second post-filter element 11 .
  • the first filter element 1 It is spaced apart from the second filter element 2 and is provided with a first water sealing member 71 at the spaced location.
  • the first water sealing member 71 is opposite to the second end cap 92 .
  • the first filter element is wrapped around the outer circumference of the first post-filter element, and the pure water filtered by the first filter element can be transported radially inward to the first post-filter element for further filtration and purification.
  • the second filter element is wrapped around the second post-filter element.
  • the outer circumference of the filter element can transport the pure water filtered by the second filter element radially inward to the second post-filter element for further filtration and purification; the first water sealing member can separate the concentrated water on the inner circumference and the raw water on the outer circumference. Separate and seal between them to prevent the two from mixing.
  • the first post-filter element 10 is located above the second post-filter element 11 , and the central axes of the first post-filter element 10 and the second post-filter element 11 are coincident and vertically aligned. Extend in straight direction;
  • the first end cap 91, the second end cap 92 and the third end cap 93 are arranged at intervals from top to bottom;
  • the upper end of the first end cap 91 is a closed end, and raw water enters the first filter element 1 through the top of the first filter element 1;
  • the lower end of the third end cap 93 is an open end, forming a pure water outlet 8.
  • the lower end of the second filter element 2 is provided with a second water sealing member 72, and the second water sealing member 72 can seal water.
  • the concentrated water outlet 4 is formed between the second water sealing member 72 and the third end cover 93 .
  • Embodiment 2 of the present disclosure is the specific implementation structure of Embodiment 2 of the present disclosure, that is, the first and second post-filter elements are arranged in a vertical direction, allowing raw water to flow into the first filter element for filtration from top to bottom, and then filter the water in the first filter element.
  • the concentrated water is transported to the second filter element for filtration, forming a one-stage and two-stage filtration structure.
  • the pure water opening formed under the third end cover can effectively export the pure water filtered by the post-filter element.
  • the concentrated water outlet is set to The impurity water filtered out by the second filter element is exported.
  • the first end cap 91 , the second end cap 92 and the third end cap 93 are all injection molded parts; the first post-filter element 10 and the second post-filter element 11 are all made of microporous filter material, and the pore size of the microporous filter material is 0.02 ⁇ 10pm.
  • the three end caps of the present disclosure are all made of injection molded parts, which can effectively play a supporting and fixing role.
  • the first and second rear filter elements are made of microporous filter materials, which can filter the pure water filtered out by the first and second filter elements. Further fine filtration of water can improve the taste of water and improve filtration accuracy.
  • the microporous filter material includes at least one of activated carbon and ceramics. Compared with the visible hole of the injection molded part, it can achieve surface contact between the water produced by the fine filter element and the post-filter element, resulting in a better purification effect.
  • the length ratio of the first post-filter element 10 and the second post-filter element 11 is preferably between 1 and 2.5.
  • one axial end of the first post-filter element 10 is bonded to the first end cap 91 , and the other axial end of the first post-filter element 10 is bonded to the second end cap 92 Bonding; one axial end of the second post-filter element 11 is bonded to the second end cap 92, and the other axial end of the second post-filter element 11 is bonded to the third end cap 93;
  • the outer diameter of the first post-filter element 10 is less than or equal to the outer diameter of the first end cap 91, and the outer diameter of the first post-filter element 10 is also less than or equal to the outer diameter of the second end cap 92;
  • the outer diameter of the second post-filter element 11 is less than or equal to the outer diameter of the second end cap 92 , and the outer diameter of the second post-filter element 11 is also less than or equal to the outer diameter of the third end cap 93 .
  • the first post-filter element of the present disclosure and the two end caps are fixed by bonding.
  • the first post-filter element 10 is cylindrical, and its outer diameter ⁇ the first end cap 91 and the second end cap.
  • the outer diameter of the cover 92 is equal to the inner diameter of the effective inner diameter outer wall of the two end caps to achieve fit.
  • the connection between the first rear filter element 10 and the two end caps is fixed on the matching end surface through glue bonding;
  • the second rear filter element 11 is cylindrical, its outer diameter ⁇ the outer diameter of the second end cover 92 and the third end cover 93, and its inner diameter is equal to the effective inner diameter and outer wall of the two end covers to achieve fit.
  • the connection between the rear filter element 11 and the two end caps is fixed on the matching end faces through glue;
  • the present disclosure also provides a water purification device, which includes the staged filter element described in the preceding item.
  • This disclosure uses staged filter element technology as a way to achieve high water production rate.
  • staged filter element technology By providing an optimally designed central tube, it realizes staged filter element technology on the same central tube, that is, it realizes staged filter element technology on one filter element assembly.
  • the filtration function achieves the purpose of increasing the water production rate of purified water, and at the same time solves the volume control problem caused by the staged filter element technology of multiple filter elements connected in series.
  • the central tube provided by this technical solution not only ensures that the fine filter element can perform staged filtration to improve the water purification rate, but can also be integrated with the post-taste filter element to improve the integration of the filter element and reduce the number of filter bottles used. , which is conducive to the small size design function of the whole machine.
  • staged filter element assembly which includes:
  • the first filter element 1, the second filter element 2, the support member, the filter bottle body 12 and the filter bottle cap 13 (wherein the first filter element 1, the second filter element 2 and the support member form a step-type structure with the same structure as in the first embodiment) filter element), the support member can support the first filter element 1 and the second filter element 2 at the same time, raw water can be filtered through the first filter element 1, and the pure water filtered through the first filter element 1 can Entering the interior of the support member and being discharged along the support member, the concentrated water filtered through the first filter element 1 can reach the second filter element 2 for filtration, and is filtered out through the second filter element 2
  • the pure water can also enter the inside of the support member and be discharged along the support member, and the concentrated water filtered through the second filter element 2 can pass through the concentrated water outlet 4 and be discharged;
  • the filter bottle body 12 and the filter bottle cap 13 together form an internal cavity, and the first filter element 1, the second filter element 2 and the support member are all arranged in the internal cavity;
  • the upper end of the first filter element 1 is not provided with a water sealing member.
  • the present disclosure provides a staged filtration rolled membrane filter element structure with a shared central tube.
  • the concentrated water from the first-level filter element is used as the raw water for the next-level filter element, thereby achieving the purpose of high water production rate and avoiding the possible release of chemical substances from chemical scale inhibitors, the volume problem caused by multiple filter elements in series, and the purity of a single filter element. Realize the filter element fouling problem caused by high water production rate.
  • first and second filter elements are arranged on the same support member.
  • the pure water filtered by the first filter element is discharged from the pure water outlet, and the filtered concentrated water (impurity water) enters the second filter element for filtration, forming at least one level.
  • the two-stage filtration can effectively realize the staged filtration technology compared to the series connection of multiple fine filter elements. It can realize the staged filter element filtration function on the same central pipe, which can improve the recycling rate of waste water.
  • Each existing filter element requires a membrane shell, so the series filter element requires multiple membrane shells.
  • the present disclosure can effectively save the volume of membrane shells, etc., and ultimately can increase the recovery rate while reducing the volume, effectively solving The volume control problem of the whole machine caused by the series connection of multiple filter elements; the staged filter element filtration technology is implemented on the same central tube, which eliminates the use of multiple filter bottles with filter elements in series. It can realize the integrated design of the filter element and reduce the cost of the filter element and the whole machine.
  • the volume has an important promoting effect; compared with the use of anti-scaling agents to achieve high recovery rate filter technology (through one stage and two stages (at least two stages), there is no need to use anti-scaling agents), the stage-type filter element technology does not have anti-scaling agents Hygiene and safety issues caused by the release of scale substances.
  • This disclosure 1) realizes one-stage and two-stage filter element filtration technology on the same central tube, which reduces the use of two filter elements in series to exert the one-stage and two-stage filtration technology and multiple filter bottles, realizes the integrated design of filter elements, and reduces the cost of filter elements. It plays an important role in promoting the size of the whole machine;
  • high water production rate can be achieved by controlling the relationship between flow rate and recovery rate, which can effectively extend the service life of the filter element;
  • the segmented filter element technology can improve the water purification rate of the filter element compared to the single-stage filter element technology.
  • the filter bottle cap 13 is provided on the upper end of the filter bottle body 12:
  • the lower end of the filter bottle body 12 is provided with a raw water inlet 3, the lower end of the support member forms a pure water outlet 8, and a concentrated water outlet 4 is provided between the lower end of the filter bottle body 12 and the support member; or,
  • the filter bottle cap 13 is provided with a raw water inlet 3, the lower end of the support member forms a pure water outlet 8, and a concentrated water outlet 4 is provided between the lower end of the filter bottle body 12 and the support member.
  • Embodiment 4 As shown in Figure 7.
  • the raw water enters from the lower end of the filter bottle body at the lower end. After reaching the upper end, it enters the first filter element, and then flows downward and comes over in sequence.
  • the water outlet and the pure water outlet are both located at the lower end, and finally the filtered pure water (without impurities) and concentrated water (containing impurities) are discharged through the pure water outlet and the concentrated water outlet respectively;
  • Embodiment 5, as shown in Figure 8 the raw water is discharged from Water enters the filter bottle cap at the upper end and flows down and over in sequence.
  • the concentrated water outlet and the pure water outlet are both located at the lower end.
  • the filtered pure water (without impurities) and concentrated water (containing impurities) pass through the pure water outlet respectively. and concentrated water outlet.
  • the present disclosure provides an integrated rolled membrane filter element with a staged filtration function and its structure.
  • the staged functions it can realize are not limited to one stage and two stages, but also include one stage and three stages. Or even more segments, so the specific filter element structure can be selected according to the desired water purification rate.
  • the structure and production method of the filter element that realizes one-stage and two-stage functions with the same central tube are mainly explained, as follows:
  • Nanofiltration and reverse osmosis filter elements generally include three water inlets, raw water inlet, concentrated water outlet and pure water outlet. According to the arrangement of the water inlets, there are two forms: 1. The three water inlets are distributed at the same end; 2. The concentrated water outlet The pure water outlet is arranged at one end, and the raw water inlet is arranged at a separate end. As follows, the one-stage and two-stage filtration functions are realized based on the same central tube, and the details are explained according to the arrangement of the water inlets.
  • a first gap channel 101 capable of flowing water is formed between the upper end of the first filter element 1 and the filter bottle cap 13 , and the outer periphery of the first filter element 1 and the filter bottle body 12
  • a second interstitial flow channel 102 is formed between the outer circumference of the second filter element 2 and the filter bottle body 12 and a third interstitial flow channel 103 is formed between the outer periphery of the second filter element 2 and the filter bottle body 12 to allow the flow of water.
  • a fourth gap channel 104 through which water can flow is formed between the lower end and the filter bottle body 12 .
  • the disclosure passes through the first gap flow channel between the upper end of the first filter element and the filter bottle cap, the second gap flow channel around the first filter element, the third gap flow channel around the second filter element, and the fourth gap at the lower end of the second filter element.
  • the flow channel enables the raw water as shown in the embodiment to sequentially pass through the fourth gap flow channel, the third gap flow channel, the second gap flow channel and the first gap flow channel to enter the upper end of the first filter element and enter the first gap flow channel.
  • this is a specific implementation structural form of Embodiment 4 of the present disclosure.
  • the lower end of the second filter element 2 is also provided with a first water sealing member 71, and the first water sealing member 71 can A part of the structure of the lower end of the second filter element 2 is sealed, and an opening is provided on the first water sealing member 71 to form a first outlet 71a, which allows the concentrated water filtered by the second filter element 2 to pass through the
  • the first water sealing member 71 flows downward to the concentrated water outlet 4 and is discharged;
  • a second water sealing member 72 is provided at the outer circumferential position between the first filter element 1 and the second filter element 2 in the axial direction to prevent The raw water on the outer periphery of the second water sealing member 72 is sealed with the concentrated water on the inner periphery of the second water sealing member 72;
  • a first water sealing member 71 is also provided at the lower end of the second filter element 2.
  • the first water sealing member 71 can seal the lower end of the second filter element 2.
  • the first water sealing member 71 is provided with an opening to form a first outlet 71a, which allows the concentrated water filtered by the second filter element 2 to flow downward to the desired location through the first outlet 71a.
  • the concentrated water outlet 4 is discharged;
  • a second water sealing member 72 is also provided between the outer periphery of the first filter element 1 and the filter bottle body 12 to seal the raw water above the second water sealing member 72 .
  • the first water sealing member at the lower end of the second filter element can separate the raw water at the lower end of the second filter element and the concentrated water filtered out by the second filter element.
  • Providing the second water sealing member can effectively separate the concentrated water on the inner periphery from the raw water on the outer periphery.
  • the raw water in Embodiment 4 of the present disclosure enters between the second filter element and the filter bottle body from below, and reaches the first filter upward.
  • the filtered pure water enters the inside of the central tube from the first diversion hole to be discharged.
  • the filtered pure water enters the second filter element along the axial direction downward for filtration.
  • the first water sealing member at the lower end of the second filter element can separate the raw water at the lower end of the second filter element and the concentrated water filtered out by the second filter element.
  • the second water sealing member can effectively separate the concentrated water on the inner periphery from the raw water on the outer periphery, and also prevent the raw water from falling downward from the gap between the first filter element and the filter bottle body, thereby preventing effective filtration.
  • the filtered pure water enters the inside of the central tube from the first diversion hole for discharge, and the filtered pure water enters the second filter element along the axial direction downward for filtration.
  • FIG. 7 is a schematic structural diagram of an integrated rolled membrane filter element with one-stage and two-stage filtration functions arranged at the same end of the water inlet.
  • the raw water enters the filter bottle body from the raw water inlet, passes through the periphery of the second filter element 2 and reaches the end of the first filter element 1, and then enters the inside of the first filter element 1 for filtration.
  • the pure water passes through the pure water diversion port (first diversion hole) on the central tube.
  • first filter element 1 and second filter element 2 are formed from the same film sheet through gluing and film repair. They form non-independent filter elements at the same time, as will be mentioned in the subsequent sections.
  • a water sealing member (first water sealing member 71) and a water sealing member (second water sealing member 72) are also included.
  • the first water sealing member 71 is mainly used to separate the concentrated water in the second filter element 2 and the raw water in the first filter element 1.
  • the inner cavity of the first water sealing member 71 covers the end of the second filter element 2, and the outer periphery is in contact with the second filter element 1. 2.
  • the outer periphery is fixed and sealed by tape wrapping;
  • the second water sealing member 72 is mainly used to separate the concentrated water and raw water of the first filter element 1 to prevent the water flow from mixing with each other. It is formed after the first filter element 1 and the second filter element 2 are repaired.
  • the water sealing member has a T-shaped feature.
  • the T-shaped part enters the gap, and at the same time, both ends are placed on the outer periphery of the first filter element 1 and the second filter element 2. Finally, it is sealed by the tape and the two parts of the filter element.
  • Figure 8 is a schematic structural diagram of an integrated rolled membrane filter element with one-stage and two-stage filtration functions arranged at different ends of the water inlet.
  • Raw water enters the filter bottle from the raw water inlet and enters the end face of the first filter element 1 through the raw water inlet hole on the central tube for filtration.
  • the pure water is collected through the pure water diversion port (first diversion hole 61) on the central tube, and the concentrated water is It flows into the gap formed after film repair, and enters the end face of the second filter element 2 under pressure drive.
  • the raw water used as the filter element is filtered and purified again.
  • the pure water is collected through the pure water diversion port (second diversion hole 62) on the central tube and
  • the pure water in the first filter element 1 flows out through the pure water port after being merged, and the concentrated water flows out from the concentrated water port.
  • the integrated filter element with heterogeneously distributed water inlets also includes a water sealing part (first water sealing part 71) and a water sealing part (second water sealing part 72).
  • first water sealing part 71 a water sealing part
  • second water sealing part 72 a water sealing part
  • the position of the first water sealing member 71 and the water inlet are distributed at the same end, and the fixing method and structure of the second filter element 2 are the same. The difference is reflected in the function.
  • the main function of the first water sealing member 71 is to protect the second filter element 2
  • the raw water of the second filter element 2 is separated from the concentrated water produced by the second filter element 2;
  • the second water sealing member 72 is located on the side of the first filter element 1 away from the second filter element 2, and its overall shape is Y-shaped, with the big end close to the end surface of the first filter element 1 , the small end puts the first filter element 1 into it to achieve a tight fit, and at the same time achieves sealing through the tape and the outer peripheral surface of the first filter element 1, which serves to separate the raw water of the first filter element 1 and the generated concentrated water.
  • Glue line settings This technical solution is to realize segmented filter element technology through gluing and film repair on the same central tube.
  • Figure 9 shows the specific gluing method. After placing the first film sheet according to the method mentioned in the film unit, apply glue according to Figure 8. Because this technical solution is a staged filter element technology and an integrated filter element design, the first and second-stage filter elements are referred to as filter element one and filter element two respectively. As can be seen from Figure 8, the glue lines of the first filter element 1 and the second filter element 2 are glued on the other three sides except for the central tube and the diaphragm.
  • the first filter element 1 and the second filter element 2 are two A separate and complete glue line, which is perpendicular to the central tube and does not coincide with the outer edge of the diaphragm, needs to be set at a certain distance to roll the filter element and repair the membrane after the glue is cured to ensure the sealing of the filter element; each The glue line width of each filter element needs to be greater than the width of the corresponding filter element water guide port to prevent the glue from blocking the water guide port and affecting water production; the adjacent glue lines between the first filter element 1 and the second filter element 2 need to leave a distance d1 , the distance d1 is reserved for repairing the filter element after solidification to form a segmented filter element (see film repair description); the glue line position of the second filter element 2 is close to the pure water outlet end; each membrane page placed, All need to be glued according to the glueing method shown in Figure 9. After the last film sheet is placed, glue is applied and then rolled up to roll the filter element into a cylindrical shape. After the glue solidifies, the film repair
  • first filter element 1 serves as the concentrated water outlet end of the first filter element 1 and also serves as the raw water inlet end of the second filter element 2.
  • second filter element 2 serves as the concentrated water outlet end of the first filter element 1 and also serves as the raw water inlet end of the second filter element 2.
  • the support member is a structure of a central tube 5.
  • the central tube 5 is a cylindrical tube with a hollow cavity.
  • the tube wall is provided with flow guide holes penetrating the inner and outer walls.
  • the holes include a first guide hole 61 opposite to the position of the first filter element 1 and a second guide hole 62 opposite to the position of the second filter element 2. Pure water filtered through the first filter element 1 It can enter the inside of the central tube 5 through the first guide hole 61 , and the pure water filtered out by the second filter element 2 can enter the inside of the central tube 5 through the second guide hole 62 .
  • the present disclosure specifically implements the support member as a central tube structure (the whole is an injection molded part), which can be used to filter the first and second filter elements.
  • the pure water filtered by the first filter element can be effectively introduced into the internal cavity of the central tube through the first guide hole opened thereon, and the pure water can be exported.
  • the second guide hole can effectively The pure water filtered by the second filter element is introduced into the internal cavity of the central tube and exported, while the impurity water (concentrated water) filtered by the first filter element enters the second filter element for filtration, which can effectively improve the filtration effect of concentrated water.
  • the wastewater recovery rate is increased, thereby increasing the water production volume, and the volume is reduced, making the structure more compact.
  • the raw water enters from the end face of the first filter element 1 near the tail end of the central tube.
  • the pure water is collected into the central tube through the guide hole.
  • the concentrated water is used as the raw water of the second filter element 2 and enters from the concentrated water end of the first filter element 1.
  • the pure water passes through the guide hole. After the flow hole is collected, it is combined with the pure water of the first filter element 1 and discharged from the pure water port, while the concentrated water is discharged from the end face.
  • the central tube 5 sequentially includes a first shaft section 51 , a second shaft section 52 and a third shaft section 53 along its axial direction.
  • the first shaft section 51 is provided with the first flow guide. hole 61
  • the third shaft section 53 is provided with a second guide hole 62
  • the second shaft section 52 is not provided with a guide hole
  • the first filter element 1 is wound around the outer circumference of the first shaft section 51
  • the second filter element 2 is wound around the outer circumference of the third shaft section 53 .
  • the disclosed central tube is specifically configured as first, second and third shaft sections along the axial direction.
  • a first guide hole is opened on the first shaft section, and the first filter element is wound around the outer periphery of the first shaft section, so that the third shaft section can be The pure water filtered by a filter element is introduced into the internal cavity of the central tube through the first guide hole.
  • a second guide hole is opened on the third shaft section. The second filter element is wound around the outer periphery of the third shaft section, so that the second filter element can be The filtered pure water is introduced into the internal cavity of the central tube through the second guide hole.
  • D1 refers to the axial length of the first filter element
  • D3 refers to the axial length of the second filter element
  • D2 is the axial length of the interval between the two filter elements
  • the purpose is to form two parts of the filter element during film repair.
  • the starting surface of the upper end of D2 is the end surface of the first filter element close to the second filter element
  • the ending surface is the end surface of the second filter element close to The end face of the first filter element.
  • the disclosed one-stage and two-stage central tube can integrate the traditional one-stage and two-stage technology of multiple filter elements in series on the same central tube to achieve high water production rate while reducing the number of filter bottles used.
  • its filtration function is only the purification function of the fine filter element, which is a single-stage purification.
  • the central tube 5 is an injection molded part; the central tube 5 is arranged with its central axis along the vertical direction, and the first filter element 1 is located above the second filter element 2.
  • the first shaft section 51, the second shaft section 52 and the third shaft section 53 are connected in sequence from top to bottom.
  • the upper end of the central tube 5 is a closed end, and raw water enters through the top of the first filter element 1. In the first filter element 1.
  • the central tube of the present disclosure is implemented as an integral injection molded part (the specific implementation mode is integral plastic injection molding), which can effectively support the inner circumference of the filter element and also play a role in guiding pure water; vertically along the central axis
  • the central tube arranged in the direction forms the first, second and third axis segments from top to bottom.
  • the first filter element and the second filter element are also arranged from top to bottom.
  • the upper end of the central tube is closed to prevent raw water from entering the central tube. Inside, the raw water inlet is above the first filter element. The raw water enters the first filter element and is filtered. The filtered pure water then enters the inside of the central tube through the first diversion hole.
  • the central tube 5 also includes a fourth shaft section 54 and a fifth shaft section 55, and the fifth shaft section 55 is also provided with a third guide hole 63.
  • the staged filter element also includes a third filter element, the first filter element 1 is wound around the outer circumference of the first shaft section 51, and the concentrated water filtered out by the second filter element 2 can reach the third filter element The pure water filtered through the third filter element can also enter the interior of the central tube and be discharged along the central tube, and the concentrated water filtered through the third filter element can pass through the concentrated water. Water exits 4 and is discharged.
  • Embodiment 6 of the present disclosure is arranged in five shaft segments in the axial direction, and has three parts of guide holes at the beginning, which can realize one-stage and multi-stage purification.
  • the position of pure water diversion holes is opened according to the needs of the staged filter element, and it can also achieve one-stage multi-stage purification function.
  • the support member includes an end cover assembly 9, a first post-filter element 10 and a second post-filter element 11.
  • the first post-filter element 10 has a first hollow cavity inside.
  • the second post-filter element 11 has a second hollow cavity inside
  • the first post-filter element 10 is opposite to the first filter element 1, and the pure water filtered by the first filter element 1 can pass through the
  • the first post-filter element 10 is further filtered and enters the first hollow cavity.
  • the pure water filtered by the second filter element 2 can be further filtered by the second post-filter element 11 and enters the second hollow cavity.
  • the first hollow cavity is connected with the second hollow cavity.
  • the support member includes an end cover assembly and two rear filter elements, which ensures that the fine filtration filter element exerts its staged filtration function to increase the water purification rate.
  • the support member can also be integrated with the post-taste filter element to improve the integration of the filter element and reduce the number of filter bottles used, which is conducive to the small-volume design function of the whole machine; the integration of the fine filter element and the post-taste filter element is conducive to the small-volume design of the whole machine. .
  • the disclosed staged filter element assembly has one-stage and two-stage purification functions to increase the water production rate. At the same time, it can be closely matched with the post-filter element to realize two-stage purification functions in one filter element assembly.
  • Its structure is basically the same as the central tube filter element of pure injection molded parts. The difference is that the central tube is composed of injection molded parts and microporous filter materials. It can achieve one-stage and two-stage purification to increase the water production rate, and at the same time realize the production of fine filtration filter elements. Water is purified in situ to achieve a two-in-one filter element structure.
  • the first filter element 1 is wrapped around the outer periphery of the first post-filter element 10
  • the second filter element 2 is wrapped around the outer periphery of the second post-filter element 11 .
  • the first filter element 1 It is spaced apart from the second filter element 2 and is provided with the first water sealing member 71 at a spaced apart position.
  • the first water sealing member 71 is opposite to the second end cover 92 .
  • the first filter element is wrapped around the outer circumference of the first post-filter element, and the pure water filtered by the first filter element can be transported radially inward to the first post-filter element for further filtration and purification.
  • the second filter element is wrapped around the second post-filter element.
  • the outer circumference of the filter element can transport the pure water filtered by the second filter element radially inward to the second post-filter element for further filtration and purification; the first water sealing member can separate the concentrated water on the inner circumference and the raw water on the outer circumference. Separate and seal between them to prevent the two from mixing.
  • the end cap assembly 9 includes a first end cap 91 , a second end cap 92 and a third end cap 93 , and the first end cap 91 is connected to the first post-filter element 10 And at the axial end opposite to the second post-filter element 11, the second end cap 92 is connected and disposed between the first post-filter element 10 and the second post-filter element 11.
  • the three-end cap 93 is connected to an axial end provided on the second post-filter element 11 and opposite to the first post-filter element 10 .
  • the support member shown in Figure 14 is composed of injection molded parts and filter media. It can realize the purpose of high water production rate in one stage and two stages of the fine filter element. At the same time, it can be combined with the rear filter element of the fine filter element in situ to form a two-stage filtration function. Staged filter elements.
  • the specific composition includes a first end cover 91 , a second end cover 92 and a third end cover 93 , as well as a first post-filter element 10 and a second post-filter element 11 .
  • the outer outer diameter and the effective inner diameter of the three end caps are the same to facilitate the production of the initial filter element; the first end cap 91 is sealed at one end for the purpose of realizing waterway separation; the two ends of the second end cap 92 are connected for the purpose In order to achieve waterway conduction, the third end cap 93 is also connected at both ends for the purpose of draining the collected pure water. At the same time, its outer surface close to the water outlet end has a sealing groove feature to achieve waterway separation.
  • the first post-filter element 10 is located above the second post-filter element 11 , and the central axes of the first post-filter element 10 and the second post-filter element 11 are coincident and vertically aligned. Extend in straight direction;
  • the first end cap 91, the second end cap 92 and the third end cap 93 are arranged at intervals from top to bottom;
  • the upper end of the first end cap 91 is a closed end, and raw water enters the first filter element 1 through the top of the first filter element 1;
  • the lower end of the third end cap 93 is an open end, forming a pure water outlet 8.
  • the lower end of the second filter element 2 is provided with a second water sealing member 72, and the second water sealing member 72 can seal water.
  • the concentrated water outlet 4 is formed between the second water sealing member 72 and the third end cover 93 .
  • the pure water opening formed under the third end cover can effectively discharge the pure water filtered by the post-filter element, and the concentrated water is The water outlet is configured to lead out the impurity water filtered by the second filter element.
  • the first end cap 91 , the second end cap 92 and the third end cap 93 are all injection molded parts; the first post-filter element 10 and the second post-filter element 11 are all made of microporous filter material, and the pore diameter of the microporous filter material is 0.02 ⁇ 15um.
  • the three end caps of the present disclosure are all made of injection molded parts, which can effectively play a supporting and fixing role.
  • the first and second rear filter elements are made of microporous filter materials, which can filter the pure water filtered out by the first and second filter elements. Further fine filtration of water can improve the taste of water and improve filtration accuracy.
  • the microporous filter material includes at least one of activated carbon and ceramics. Compared with the visible hole of the injection molded part, it can achieve surface contact between the water produced by the fine filter element and the post-filter element, resulting in a better purification effect.
  • the length ratio of the first post-filter element 10 and the second post-filter element 11 is preferably between 1 and 2.5.
  • one axial end of the first post-filter element 10 is bonded to the first end cap 91 , and the other axial end of the first post-filter element 10 is bonded to the second end cap 92 Bonding; one axial end of the second post-filter element 11 is bonded to the second end cap 92, and the other axial end of the second post-filter element 11 is bonded to the third end cap 93;
  • the outer diameter of the first post-filter element 10 is less than or equal to the outer diameter of the first end cap 91, and the outer diameter of the first post-filter element 10 is also less than or equal to the outer diameter of the second end cap 92;
  • the outer diameter of the second post-filter element 11 is less than or equal to the outer diameter of the second end cap 92 , and the outer diameter of the second post-filter element 11 is also less than or equal to the outer diameter of the third end cap 93 .
  • the first post-filter element of the present disclosure and the two end caps are fixed by bonding.
  • the first post-filter element 10 is cylindrical, and its outer diameter ⁇ the first end cap 91 and the second end cap.
  • the outer diameter of the cover 92 is equal to the inner diameter of the effective inner diameter outer wall of the two end caps to achieve fit.
  • the connection between the first rear filter element 10 and the two end caps is fixed on the matching end surface through glue bonding;
  • the second rear filter element 11 is cylindrical, its outer diameter ⁇ the outer diameter of the second end cover 92 and the third end cover 93, and its inner diameter is equal to the effective inner diameter and outer wall of the two end covers to achieve fit.
  • the connection between the rear filter element 11 and the two end caps is fixed on the matching end faces by glue.
  • the present disclosure also provides a water purification device, which includes the staged filter element assembly described in the preceding item.
  • the present disclosure provides an integrated rolled membrane filter element with a staged filtration function. Compared with the traditional multiple filter elements connected in series to achieve staged functions, it can be realized by sharing a central tube, which has a promoting effect on reducing the volume of the filter element. , and has the characteristics of high water production rate of staged filter element filtration technology; at the same time, combined with the filter element characteristics provided by this technical solution, the staged functions it can realize are not limited to one level and two stages, including one level multi-stage function ( ⁇ 2 stages ), so the net water production rate has adjustable characteristics.
  • the present disclosure also arranges the support member including an end cover assembly and two rear filter elements to ensure that the fine filtration filter element can exert its staged filtration function to improve the water purification rate, and can also be integrated with the rear taste filter element.
  • Optimizing the integration of the filter element and reducing the number of filter bottles is conducive to the small-volume design of the whole machine; the integration of the fine filter element and the post-taste filter element is conducive to the small-volume design of the whole machine.
  • this disclosure realizes the staged filtration function on the same central tube without reducing the effective flow channel length of the filter element, thereby achieving high water production rate while effectively ensuring the service life of the filter element; this disclosure also adopts the first
  • the sealing structures and clearance channels provided at the axial and radial ends of the filter element and the second filter element form a compact flow channel structure to improve filtration efficiency.
  • the present disclosure provides an integrated rolled membrane filter element with a staged filtration function. Compared with the traditional multiple filter elements connected in series to achieve staged functions, it can be realized by sharing a central tube, which has a promoting effect on reducing the volume of the filter element.
  • staged filter element filtration technology has the characteristics of high water production rate of staged filter element filtration technology; at the same time, combined with the filter element characteristics provided by this technical solution, the staged functions it can realize are not limited to one level and two stages, including one level multi-stage function ( ⁇ 2 stages ), so the net water production rate has adjustable characteristics.
  • the present disclosure also provides a water purification system including a staged filter element, which includes:
  • the staged filter element 900 includes a first-stage multi-stage filter element, a support member, a raw water inlet 100, a pure water outlet 200, and a concentrated water outlet 300.
  • the support member The first-stage multi-stage filter element can be supported at the same time, the water outlet of the pretreatment filter element 20 can be connected to the raw water inlet 100, and the water inlet of the post-treatment filter element 21 can be connected to the pure water outlet 200;
  • the one-stage multi-stage filter element includes: a first filter element 1 (i.e., a first-stage filter element), a second filter element 2 (i.e., a second-stage filter element) (wherein the first filter element 1, the second filter element 2, and the supporting member are formed in the same manner as in the first embodiment).
  • Segmented filter elements with the same structure, one-stage multi-stage filter element that is, the structure of the first filter element and the second filter element combined
  • the support member can support the first filter element 1 and the second filter element 2 at the same time, and the raw water can After being filtered by the first filter element 1, the pure water filtered by the first filter element 1 can enter the inside of the support member and be discharged along the support member, and the concentrated water filtered by the first filter element 1 can The water can reach the second filter element 2 for filtering, and the pure water filtered out by the second filter element 2 can also enter the inside of the support member and be discharged along the support member, passing through the second filter element 2 2.
  • the filtered concentrated water can pass through the concentrated water outlet 300 and be discharged;
  • the water outlet of the pre-treatment filter element 20 can be connected to the raw water inlet 100 through the first pipeline 400, and the water inlet of the post-treatment filter element 21 can be connected to the pure water outlet 200 through the second pipeline 500.
  • the present disclosure forms at least one-stage and two-stage filtration, can realize the stage-type filter element filtration function on the same support member, and improves the recycling rate of concentrated water.
  • the present disclosure can also effectively save the volume of membrane shells, etc., and improve the efficiency of the process.
  • the recovery rate can also be reduced while the volume is reduced, effectively solving the volume control problem of the entire machine caused by the series connection of multiple filter elements; the staged filter element technology does not have health and safety issues caused by the release of scale-inhibiting substances.
  • the disclosure makes the membrane surface flow velocity differ, thereby producing the effect of dividing the membrane surface scaling area (the area that is first scaled is close to the concentrated water outlet end), and can also effectively improve the efficiency of the filter element and the water purification system.
  • the service life enables the water purification system of the present disclosure to also have the technical effect of "long life”.
  • first and second filter elements are arranged on the same support member.
  • the pure water filtered by the first filter element is discharged from the pure water outlet, and the filtered concentrated water and impurity water enter the second filter element for filtration, forming at least one level and two sections.
  • the staged filter element filtration function on the same central pipe, which can improve the recycling rate of concentrated water.
  • Due to the existing Each filter element requires a membrane shell, so the series filter element requires multiple membrane shells.
  • the present disclosure can effectively save the volume of membrane shells, etc., and ultimately can increase the recovery rate while reducing the volume, effectively solving the problem of multiple filter elements.
  • the volume control problem of the whole machine caused by series connection compared with the use of anti-scaling agents to achieve high recovery rate filter technology (through one stage and two stages (at least two stages), without using anti-scaling agents), the stage-type filter element technology does not There are health and safety issues caused by the release of anti-scaling substances.
  • the disclosure makes the membrane surface flow velocity differ, thereby producing the effect of dividing the membrane surface scaling area (the area that is first scaled is close to the concentrated water outlet end), and can also effectively improve the efficiency of the filter element and the water purification system.
  • the service life enables the water purification system of the present disclosure to also have the technical effect of "long life".
  • This disclosure uses the filter element glueing process design and combined with the post-film repair process to achieve one-stage and two-stage rolled membrane filter element segmented filtration technology in the same central tube. Compared with the existing single-stage filter element filtration, it has the characteristics of high pure water rate and relatively high purity. Compared with the segmented filter element technology in which multiple filter elements are connected in series, the integrated design can promote the reduction of the volume of the filter element and the volume of the corresponding model.
  • One-stage two-stage explanation It contains two parts of filter elements.
  • the pure water from the first part of the filter element and the pure water from the second part of the filter element are collected together. Neither of them undergoes secondary fine filtration, so it is called the first level.
  • the first part of the filter element produces concentrated water, which is called concentrated water. It is one stage, and the concentrated water in the first part enters the second part of the filter element as raw water, and the concentrated water is also produced, which is called the second stage. In general, it is one level and two sections.
  • the present disclosure proposes a one-stage and two-stage filter element water purification system, including core components such as a pretreatment filter element, a pump, a one-stage two-stage composite filter element, and a post-treatment filter element.
  • the pretreatment filter element is carbon, PP cotton, ultrafiltration, etc.
  • the raw water After waiting for the pre-filter element, the raw water enters the pre-treatment filter element through the water inlet for the first step of preliminary filtration, which removes sediment and other large particle impurities in the raw water. Because nanofiltration, reverse osmosis, etc. require a certain osmotic pressure during filtration, the raw water needs to be pressurized through a water pump. After pressurization, it passes through the core one-stage two-stage composite filter element.
  • the filter element can be reverse osmosis, nanofiltration, etc.
  • the raw water is first filtered by the first-stage filter element to produce pure water and wastewater respectively.
  • the pure water part flows out from the pure water port through the pure water channel, while the wastewater part is used as the raw water for the second-stage filter element. It flows through the second-stage filter element to continue filtration.
  • the filtered pure water flows out from the pure water port, and the waste water flows through the waste water solenoid valve and is discharged.
  • This process can be achieved in two ways: 1. axial type (the first-stage filter element is below the second-stage filter element), 2. radial type (the first-stage filter element surrounds the second-stage filter element).
  • the wastewater solenoid valve opens.
  • the post-treatment filter element can be: activated carbon, ultrafiltration, etc.
  • the pure water is passed through the post-treatment filter element to improve the taste and then flows out for drinking.
  • the wastewater valve When making water, the wastewater valve is closed, and the raw water enters the pretreatment filter element from the water inlet for primary treatment. After being pressurized by the pump, the pretreated raw water enters the first-stage two-stage filter element through the raw water inlet. The raw water passes through the first-stage filter element and the second-stage filter element successively.
  • the produced water flows from the pure water port into the post-treatment filter element, and the pure water treated by the post-treatment filter element flows out through the pure water port; the wastewater generated by the first-stage filter element is used as the raw water of the second-stage filter element for filtering treatment, and the produced water is mixed with the first-stage filter element.
  • the product water flows into the post-treatment filter element and then flows out through the pure water port, and the waste water flows out through the concentrated water port.
  • the wastewater valve is opened, and the raw water passes through the treated filter element and uses high-speed water flow to wash the surface of the filter element.
  • the dirt on the surface of the filter element is discharged from the wastewater outlet with the water flow.
  • Level corresponds to pure water, the raw water of the next part of the filter element is the pure water of the previous part of the filter element.
  • Section Corresponds to concentrated water.
  • the raw water of the next part of the filter element is the concentrated water of the previous part of the filter element.
  • it also includes a filter element housing 3b (i.e., a membrane shell).
  • the raw water inlet 100, the pure water outlet 200, and the concentrated water outlet 300 are all provided at the axial first end of the filter element housing 3b. ;
  • the raw water inlet 100 is provided at the axial first end of the filter housing 3b, and the pure water outlet 200 and the concentrated water outlet 300 are both provided at the axial second end of the filter housing 3b.
  • the first filter element 1, the second filter element 2 and the support member are all provided in the same filter element housing 3b;
  • the second filter element 2 is located at one axial end of the first filter element 1 .
  • the second filter element 2 is disposed close to the raw water inlet 100 relative to the first filter element 1 .
  • the support member is also located on the third filter element 1 .
  • the shape of the shell can be defined by the filter element shell.
  • the first section and the second filter element and the support member are provided inside, and the support member is used to define the first and second filter elements.
  • the first filter element and the second filter element are arranged up and down in the axial direction, so that water is filtered from the first filter element at the lower end and sent out from the pure water outlet at the upper end. The water that has not entered the first filter element then reaches the second filter element for filtration. It forms a one-stage and two-stage filtration structure to improve the utilization efficiency and recycling efficiency of waste water.
  • the raw water inlet 100, the pure water outlet 200 and the concentrated water outlet 300 are all provided at the upper end of the filter element housing 3b.
  • the first filter element 1 is located below the second filter element 2, and a first gap flow channel 101 for water supply is formed between the lower end of the first filter element 1 and the filter element housing 3b.
  • a second gap channel 102 for water supply is formed between the outer periphery of the first filter element 1 and the filter element housing 3b, and a third gap channel 102 for water supply is formed between the outer periphery of the second filter element 2 and the filter element housing 3b.
  • Three gap flow channels 103, a fourth gap flow channel 104 capable of flowing water is formed between the upper end of the second filter element 2 and the filter element housing 3b.
  • the present disclosure passes through the first gap flow channel between the lower end of the first filter element and the filter element shell, the second gap flow channel on the outer periphery of the first filter element, the third gap flow channel on the outer periphery of the second filter element, and the fourth gap flow at the upper end of the second filter element.
  • channel which enables the raw water as shown in the embodiment to sequentially pass through the fourth gap flow channel, the third gap flow channel, the second gap flow channel and the first gap flow channel to enter the lower end of the first filter element and enter the first filter element in for further filtration and purification.
  • the upper end of the second filter element 2 is also provided with a first water sealing member 71, and the first water sealing member 71 can seal the second filter element 2.
  • a second water sealing part 72 is provided at the outer circumferential position between the first filter element 1 and the second filter element 2 in the axial direction to seal the outer circumference of the second water sealing part 72
  • the raw water is sealed with the concentrated water in the inner circumference of the second water sealing member 72 .
  • the short flow channel segmented filter element structure of the present disclosure can separate the raw water from the second filter element and the concentrated water filtered by the second filter element through the first water sealing member at the upper end of the second filter element.
  • Providing a second water sealing member on the outer periphery of the interval between the two filter elements can effectively separate the concentrated water on the inner periphery from the raw water on the outer periphery.
  • the raw water in the short flow channel structure of the present disclosure enters between the first filter element and the outer shell from below. And upward to the first filter element, it can enter the first filter element along the axial direction for filtration.
  • the filtered pure water enters the inside of the central tube from the first diversion hole to be discharged.
  • the filtered pure water enters upward along the axial direction. Filter in the second filter element.
  • the short flow channel segmented filter element structure of the present disclosure can separate the raw water at the upper end of the second filter element from the concentrated water filtered out by the second filter element through the first water sealing member at the upper end of the second filter element.
  • the first filter element and The second water sealing member provided between the casings can effectively separate the concentrated water on the inner periphery from the raw water on the outer periphery, and also prevent the raw water from falling downward from the gap between the first filter element and the casing.
  • the filtered pure water enters the inside of the central tube from the first diversion hole to be discharged, and the filtered pure water enters the second filter element upward along the axial direction for filtration.
  • a third water sealing member 73' is provided at the lower end of the first filter element 1, and the third water sealing member 73' can seal the third water sealing member 73'.
  • a partial structure of the lower end of a filter element 1 is sealed, and an opening is provided on the third water sealing member 73' to form a first inlet 73a, which can allow water under the first filter element 1 to pass through the first inlet 73a. Flow upward into the first filter element 1 .
  • the third water sealing member and the first inlet, fourth water sealing member and third outlet opened thereon can effectively ensure that water can only enter from the first inlet. It is filtered in the first filter element, and the concentrated water filtered out in the first filter element can only enter the second filter element for filtration through the second inlet, and the concentrated water filtered out in the second filter element can only be effectively exported through the third outlet. It is discharged from the concentrated water outlet, and the first inlet and the second inlet are located at different ends in the radial direction, which can increase the flow path of the water in the radial direction in the first filter element and prevent the water from being filtered along the axial direction without effective filtering.
  • the second inlet and the third outlet located at different ends in the radial direction can increase the flow path of water in the radial direction in the second filter element, preventing the water from being ineffective along the axial direction.
  • the filtration will be discharged, thereby improving the filtration effect of the second filter element.
  • a fourth water sealing member 74' is provided between the upper end of the first filter element 1 and the lower end of the second filter element 2.
  • the fourth water sealing member 74' can seal the third water sealing member 74'.
  • a partial structure of the upper end of the filter element 1 is sealed, and an opening is provided on the fourth water sealing member 74' to form a second inlet 74a, which allows the concentrated water filtered by the first filter element 1 to pass through the second inlet 74a.
  • the inlet 74a flows upward into the second filter element 2;
  • the first water sealing member 71 is provided with an opening to form a third outlet 71b, which allows the concentrated water filtered by the second filter element 2 to pass through the third outlet.
  • 71b flows upward to the concentrated water outlet 300 and is discharged.
  • the first inlet 73a is disposed radially inward relative to the second inlet 74a, and the third outlet 71b is disposed radially inward relative to the second inlet 74a; or The first inlet 73a is disposed radially outward relative to the second inlet 74a, and the third outlet 71b is disposed radially outward relative to the second inlet 74a.
  • FIG. 19 is a schematic structural diagram of a long flow channel, one-stage and two-stage integrated rolled membrane filter element distributed at the same end of the water inlet.
  • the raw water enters from the raw water port of the filter bottle, passes through the water sealing part (first water sealing part 71), the second filter element 2, the water sealing part (the second water sealing part 72), and the outside of the first filter element 1 in sequence, and then reaches the water sealing part.
  • the inlet of the first filter element 1 (the third water sealing member 73') enters the end surface of the first filter element 1 for filtration and purification.
  • the pure water is collected through the pure water diversion port (the first diversion hole 61) on the central tube, and the concentrated water is collected along the
  • the axial filtering of the first filter element 1 enters the end surface of the second filter element 2 from the inlet of the water sealing member (second water sealing member 72).
  • the concentrated water in the first filter element 1 is filtered again as the raw water of the second filter element 2 to achieve a water production rate.
  • the pure water in the second filter element 2 is collected through the pure water diversion port (second diversion hole 62) on the central tube, then merges with the pure water in the first filter element 1, and is discharged through the pure water port on the central tube, and the concentrated water Then it is discharged from the outlet of the water sealing member (the first water sealing member 71) and reaches the concentrated water discharge port of the filter bottle body for discharge.
  • the water sealing member (the third water sealing member 73') functions to separate the raw water of the first filter element 1 and the concentrated water of the first filter element 1, and at the same time combines the glue with the end face seal of the first filter element 1, leaving an inlet to realize the third The long flow channel feature of the first filter element 1;
  • the function of the water sealing member (the second water sealing member 72) is to separate the raw water of the first filter element 1 and the concentrated water of the first filter element 1, and at the same time, it is combined with glue to realize the separation between the first filter element 1 and the first filter element 1.
  • the contacting end faces of the filter element are sealed, leaving an inlet, which works together with the water sealing part (the first water sealing part 71) and the water sealing part (the third water sealing part 73') to realize the long flow channel characteristics of the two-stage filter element;
  • the function of the water sealing member (the fourth water sealing member 74') separates the raw water in the first filter element 1 and the concentrated water in the second filter element 2.
  • the binding glue contacts the water sealing member (the first water sealing member 71) and the second water sealing member 74'.
  • the end face of the filter element 2 is sealed, leaving an outlet to realize the long flow channel feature inside the second filter element 2 .
  • the position of the water sealing member (the third water sealing member 73') - the first inlet 73a and the position of the water sealing member (the fourth water sealing member 74') - the second inlet 74a are in a diagonal distribution relationship, and the purpose is to avoid The direction of water flow and the short flow path affect the life of the filter element; the positions of the water sealing part (the fourth water sealing part 74') - the second inlet 74a and the water sealing part (the first water sealing part 71) - the third outlet 71b are also diagonal
  • the purpose of distribution relationship is also to avoid the direction of water flow to shorten the flow path and affect the life of the filter element.
  • the main body of the water sealing member (the third water sealing member 73') is quasi-cylindrical, and is fixed and sealed by sticking with the outer periphery of the first filter element 1; the main body of the water sealing member (the second water sealing member 72') is expandable.
  • the groove corresponding to the tip part and the outer surface of the central tube is sealed with glue, and the sections at both ends of the tip part that are in contact with the first filter element 1 and the second filter element 2 are sealed with glue, and the water sealing part (second water sealing part)
  • the tip of the component 72 After the tip of the component 72) is inserted into the gap between the first filter element 1 and the second filter element 2 and fixed with glue, it forms a circle that wraps the first filter element 1 and the second filter element 2, and its outer surface is consistent with the first filter element 1 and the second filter element.
  • the main body of the water sealing member (first water sealing member 71) is cylindrical, the second filter element 2 is inserted into its inner cavity, and the outer surface and the second filter element 2 are sealed and fixed by adhesive tape.
  • the bottom of the water sealing member away from the second filter element 2 has a sealing ring setting position, which is set to a corresponding position inside the filter bottle to achieve installation and sealing to achieve the purpose of waterway separation.
  • Rolled membrane filter elements are all flat membranes that are wound and rolled on a central tube with holes through the action of glue, tape, etc.
  • the central tube used in the traditional single-stage fine filtration filter element is generally made of injection molded parts.
  • the central tube is cylindrical and has through-hole pure water diversion holes.
  • the pure water diversion holes are generally evenly distributed; in addition, on the shaft Upwards, one end of the central tube is closed to separate the collected pure water from other water; the other end is open and is configured to guide the collected pure water out.
  • the support member is a structure of a central tube 5.
  • the central tube 5 is a cylindrical tube with a hollow cavity, and is provided with a A guide hole penetrating through the inner and outer walls, the guide hole including a first guide hole 61 opposite to the position of the first filter element 1 and a second guide hole 62 opposite to the position of the second filter element 2,
  • the pure water filtered through the first filter element 1 can enter the interior of the central tube 5 through the first guide hole 61
  • the pure water filtered out through the second filter element 2 can pass through the second guide hole 61 .
  • the flow hole 62 enters the interior of the central tube 5 .
  • the support member is specifically configured as a central tube structure (the whole is an injection molded part), which can effectively support the first and second filter elements. , it can also effectively introduce the pure water filtered by the first filter element into the internal cavity of the central tube through the first diversion hole opened on it, and export the pure water, and the second diversion hole can effectively filter out the second filter element. Pure water is introduced into the internal cavity of the central tube and exported, while the impurity water (concentrated water) filtered out by the first filter element enters the second filter element for filtration, which can effectively improve the filtration effect of concentrated water and increase the recovery rate of concentrated water. This increases the amount of pure water while reducing the volume, making the structure more compact.
  • Figure 22 is a schematic diagram of the water path structure of the filter element based on the one-stage and two-stage central tube of the injection molded part shown in Figure 20. It only has the function of one-stage and two-stage purification of the same central tube to increase the pure water rate.
  • the specific composition includes a central tube, a first filter element 1, a second filter element 2, and a first water sealing member 71 and a second water sealing member 72. Among them, the raw water enters from the end face of the first filter element 1 near the tail end of the central tube, the pure water is collected into the central tube through the diversion hole, and the concentrated water is used as the raw water of the second filter element 2 and enters from the concentrated water end of the first filter element 1.
  • the pure water After being collected through the diversion hole, it is combined with the pure water of the first filter element 1 and discharged from the pure water port, while the concentrated water is discharged from the end face.
  • the function of the second water sealing part 72 is to separate the raw water (the outer circumference is raw water) and the concentrated water of the first filter element 1
  • the function of the first water sealing part 71 is to separate the concentrated water and raw water of the second filter element 2 ( The outer circumference is surrounded by raw water) separated.
  • the central tube 5 sequentially includes a first shaft section 51 , a second shaft section 52 and a third shaft section 53 along its axial direction.
  • the first shaft section 51 is provided with the first flow guide. hole 61
  • the third shaft section 53 is provided with a second guide hole 62
  • the second shaft section 52 is not provided with a guide hole
  • the first filter element 1 is wound around the outer circumference of the first shaft section 51
  • the second filter element 2 is wound around the outer circumference of the third shaft section 53 .
  • the central tube of the present disclosure is specifically configured as first, second and third shaft sections along the axial direction.
  • a first guide hole is opened on the first shaft section, and the first filter element is wound around the outer periphery of the first shaft section, which can The pure water filtered by the first filter element is introduced into the internal cavity of the central tube through the first guide hole.
  • a second guide hole is opened on the third shaft section. The second filter element is wound around the outer periphery of the third shaft section, so that the second guide hole can be The pure water filtered by the filter element is introduced into the internal cavity of the central tube through the second guide hole.
  • a distance of D2 i.e. the second shaft section
  • D3 is used to form a two-part filter element during film repair.
  • the upper end of D2 starts from The surface is the end surface of the first filter element close to the second filter element, and the end surface is the end surface of the second filter element close to the first filter element.
  • the one-stage two-stage central tube shown in Figure 20 can integrate the traditional one-stage two-stage technology of multiple filter elements in series on the same central tube to achieve high pure water rate and reduce the number of filter bottles.
  • its filtration function is only the purification function of the fine filter element, which is a single-stage purification.
  • the central tube 5 is an injection molded part; the first filter element 1 and the second filter element 2 are spaced apart, and a second water sealing member 72 is provided at the spaced location.
  • the water member 72 is opposite to the second shaft section 52; and/or,
  • the axial length of the first shaft section 51 is D1
  • the axial length of the second shaft section 52 is D2
  • the axial length of the third shaft section 53 is D3
  • D1:D2 1 ⁇ 2.5.
  • the central tube in Embodiment 7 of the present disclosure is an integral injection molded part (specifically implemented as an integral plastic injection molding), which can effectively support the inner circumference of the filter element and also guide pure water; the second water seal
  • the components are configured to effectively isolate and separate the concentrated water inside the filter element and the raw water on the outside to prevent the two from mixing.
  • a central tube capable of realizing one-stage and two-stage functions is taken as an example for explanation.
  • Figure 20 shows a structure that can realize a one-stage two-section central tube. Compared with the traditional central tube, its pure water diversion hole is divided into two parts, specifically the first pure water diversion hole (first diversion hole 61) and the second pure water diversion hole.
  • the first guide hole 61 is set to collect the pure water generated by the first filter element, and its position is distributed in the D1 area; the second guide hole 62 is set to collect The pure water produced by the second filter element is located in the D3 area.
  • the central tube 5 is arranged with its central axis along the vertical direction, the first filter element 1 is located below the second filter element 2, the first shaft section 51, the second The shaft section 52 and the third shaft section 53 are connected in sequence from bottom to top.
  • the lower end of the central tube 5 is a closed end, and raw water enters the first filter element 1 through the bottom of the first filter element 1 .
  • This is a specific structural form of the central tube of the present disclosure.
  • the central tube arranged along the vertical direction of the central axis forms the first, second and third shaft segments from bottom to top.
  • the first filter element and the second filter element are also arranged from bottom to top. Arranged at the top, the lower end of the central tube is closed to prevent raw water from entering the inside of the central tube.
  • the raw water inlet is above the first filter element.
  • the raw water enters the first filter element from below and is filtered.
  • the filtered pure water enters through the first diversion hole.
  • the upper end of the central tube 5 is an open end, forming a pure water outlet 200.
  • the upper end of the second filter element 2 is provided with a first water sealing member 71, and the first water sealing member 71 can The water is sealed, and the concentrated water outlet 300 is provided at the upper end of the first water sealing member 71 .
  • the lower end of the central tube of the present disclosure is an open end, which can effectively form a pure water outlet to effectively lead out the pure water in the central tube.
  • the present disclosure can also seal and separate the upper end of the second filter element through the first water sealing member, and the third A concentrated water outlet is formed between the upper end of the water sealing member and the central tube to effectively lead out the impurity water filtered by the second filter element.
  • the central tube 5 further includes a fourth shaft segment 54 and a fifth shaft segment 55.
  • the fifth shaft segment 55 is also provided with a third guide hole 63.
  • the stage The segmented filter element also includes a third filter element.
  • the first filter element 1 is wound around the outer circumference of the first shaft section 51.
  • the concentrated water filtered out by the second filter element 2 can reach the third filter element for filtration.
  • the pure water filtered through the third filter element can also enter the interior of the central tube and be discharged along the central tube, and the concentrated water filtered through the third filter element can pass through the concentrated water outlet 300 and be discharged along the central tube. be discharged.
  • Embodiment 9 of the present disclosure is arranged in five shaft segments in the axial direction, and has three parts of guide holes at the beginning, which can realize one-stage and multi-stage purification.
  • the position of pure water diversion holes is opened according to the needs of the staged filter element, and it can also achieve one-stage multi-stage purification function.
  • the support member includes an end cover assembly 9, a first post-filter element 10 and a second post-filter element 11.
  • the interior of the first post-filter element 10 There is a first hollow cavity, and the second post-filter element 11 has a second hollow cavity inside.
  • the first post-filter element 10 is opposite to the first filter element 1.
  • the first filter element 1 filters out The pure water can be further filtered by the first post-filter element 10 and enter the first hollow cavity, and the pure water filtered by the second filter element 2 can be further filtered by the second post-filter element 11 And enters the second hollow cavity, the first hollow cavity is connected with the second hollow cavity.
  • the present disclosure also arranges the support member including an end cover assembly and two rear filter elements to ensure that the fine filtration filter element can exert its staged filtration function to improve the water purification rate, and can also be integrated with the rear taste filter element.
  • Optimizing the integration of the filter element and reducing the number of filter bottles is conducive to the small-volume design of the whole machine; the integration of the fine filter element and the post-taste filter element is conducive to the small-volume design of the whole machine.
  • Figure 23 is a schematic diagram of the water path structure of the filter element based on the one-stage and two-stage central tube of the injection molded part shown in Figure 21. It also has the same central tube to achieve one-stage and two-stage purification functions, improve the pure water rate, and can be closely connected with the post-filter element. Fitted to achieve two-stage purification functions in one filter element assembly. Its structure is basically the same as the filter element shown in Figure 20. The difference is that the central tube is composed of an injection molded part and a multi-microporous filter material. It can achieve one-stage and two-stage purification to increase the pure water rate, and at the same time, it can achieve fine filtration of pure water. position purification, realizing a two-in-one filter element structure.
  • the end cap assembly 9 includes a first end cap 91 , a second end cap 92 and a third end cap 93 , and the first end cap 91 is connected to the first post-filter element 10 And at the axial end opposite to the second post-filter element 11, the second end cap 92 is connected and disposed between the first post-filter element 10 and the second post-filter element 11.
  • the three-end cap 93 is connected to an axial end provided on the second post-filter element 11 and opposite to the first post-filter element 10 .
  • the central tube shown in Figure 21 can realize one-stage and two-stage functions.
  • its composition is composed of injection molded parts and filter media. It can realize the purpose of high-purity water rate in one-stage and two-stage fine filtration elements. At the same time, it can Combined with the post-filter element of the fine filter element in situ, it forms a segmented filter element with two-stage filtration function.
  • the specific composition includes a first end cover 91 , a second end cover 92 and a third end cover 93 , as well as a first post-filter element 10 and a second post-filter element 11 .
  • the outer outer diameter and the effective inner diameter of the three end caps are the same to facilitate the production of the initial filter element; the first end cap 91 is sealed at one end for the purpose of realizing waterway separation; the two ends of the second end cap 92 are connected for the purpose In order to achieve waterway conduction, the third end cap 93 is also connected at both ends for the purpose of draining the collected pure water. At the same time, its outer surface close to the water outlet end has a sealing groove feature to achieve waterway separation.
  • the first filter element 1 is wrapped around the outer periphery of the first post-filter element 10
  • the second filter element 2 is wrapped around the outer periphery of the second post-filter element 11 .
  • the first filter element 1 It is spaced apart from the second filter element 2 and is provided with a second water sealing member 72 at the spaced location.
  • the second water sealing member 72 is opposite to the second end cap 92 .
  • the first filter element is wrapped around the outer circumference of the first post-filter element, and the pure water filtered by the first filter element can be transported radially inward to the first post-filter element for further filtration and purification.
  • the second filter element is wrapped around the second post-filter element.
  • the outer circumference of the filter element can transport the pure water filtered out by the second filter element radially inward to the second post-filter element for further filtration and purification; the second water sealing member can separate the concentrated water on the inner circumference and the raw water on the outer circumference. Separate and seal between them to prevent the two from mixing.
  • the first post-filter element 10 is located below the second post-filter element 11 , and the central axes of the first post-filter element 10 and the second post-filter element 11 are coincident and vertically aligned. Extend in straight direction;
  • the first end cap 91, the second end cap 92 and the third end cap 93 are arranged at intervals from bottom to top;
  • the lower end of the first end cap 91 is a closed end, and raw water enters the first filter element 1 through the bottom of the first filter element 1;
  • the upper end of the third end cap 93 is an open end, forming a pure water outlet 8.
  • the upper end of the second filter element 2 is provided with a first water sealing member 71, and the first water sealing member 71 can seal water.
  • the concentrated water outlet 300 is formed between the first water sealing member 71 and the third end cover 93 .
  • Embodiment 8 of the present disclosure is the specific implementation structure of Embodiment 8 of the present disclosure, that is, the first and second post-filter elements are arranged in the vertical direction, allowing the raw water to flow into the first filter element for filtration from bottom to top, and then filter the concentrated water in the first filter element.
  • the water is transported to the second filter element for filtration, forming a one-stage and two-stage filtration structure.
  • the pure water opening formed under the third end cover can effectively export the pure water filtered by the post-filter element.
  • the concentrated water outlet is set to discharge the third filter element.
  • the impurity water filtered out by the second filter element is exported.
  • the first end cap 91 , the second end cap 92 and the third end cap 93 are all injection molded parts; the first post-filter element 10 and the second post-filter element 11 are all made of microporous filter material, and the pore size of the microporous filter material is 0.02 ⁇ 10pm.
  • the three end caps of the present disclosure are all made of injection molded parts, which can effectively play a supporting and fixing role.
  • the first and second rear filter elements are made of microporous filter materials, which can filter the pure water filtered out by the first and second filter elements. Further fine filtration of water can improve the taste of water and improve filtration accuracy.
  • the microporous filter material includes at least one of activated carbon and ceramics. Compared with the visible hole of the injection molded part, it can achieve surface contact between the pure water of the fine filter element and the post-filter element, resulting in a better purification effect.
  • the length ratio of the first post-filter element 10 and the second post-filter element 11 is preferably between 1 and 2.5.
  • one axial end of the first post-filter element 10 is bonded to the first end cap 91 , and the other axial end of the first post-filter element 10 is bonded to the second end cap 92 Bonding; one axial end of the second post-filter element 11 is bonded to the second end cap 92, and the other axial end of the second post-filter element 11 is bonded to the third end cap 93;
  • the outer diameter of the first post-filter element 10 is less than or equal to the outer diameter of the first end cap 91, and the outer diameter of the first post-filter element 10 is also less than or equal to the outer diameter of the second end cap 92;
  • the outer diameter of the second post-filter element 11 is less than or equal to the outer diameter of the second end cap 92 , and the outer diameter of the second post-filter element 11 is also less than or equal to the outer diameter of the third end cap 93 .
  • the first post-filter element of the present disclosure and the two end caps are fixed by bonding.
  • the first post-filter element 10 is cylindrical, and its outer diameter ⁇ the first end cap 91 and the second end cap.
  • the outer diameter is 92, and its inner diameter is equal to the effective inner diameter and outer wall of the two end caps to achieve fit.
  • the connection between the first rear filter element 10 and the two end caps is fixed on the matching end surface through glue bonding;
  • the second rear filter element 11 is cylindrical, its outer diameter ⁇ the outer diameter of the second end cover 92 and the third end cover 93, and its inner diameter is equal to the effective inner diameter and outer wall of the two end covers to achieve fit.
  • the connection between the rear filter element 11 and the two end caps is fixed on the matching end faces through glue;
  • it also includes a third pipeline 600 , a fourth pipeline 700 and a fifth pipeline 800 , as well as a pump 22 and a wastewater valve 23 .
  • One end of the third pipeline 600 is connected to the pretreatment filter element 20
  • the inlet of the fourth pipeline 700 is connected to the raw water
  • one end of the fourth pipeline 700 is connected to the concentrated water outlet 300 to export concentrated water or concentrated water
  • one end of the fifth pipeline 800 is connected to the post-treatment filter element 21
  • the outlet is connected to lead out pure water, and the waste water valve 23 is provided on the fourth pipeline 700 .
  • the present disclosure proposes a one-stage and two-stage filter element water purification system, including core components such as a pretreatment filter element, a pump, a one-stage two-stage composite filter element (i.e., a stage filter element 900), a post-treatment filter element, and a control component 24.
  • the pretreatment filter element is a pre-filter element such as carbon, PP cotton, ultrafiltration, etc.
  • the raw water enters the pretreatment filter element through the water inlet for the first step of primary filtration to filter out large particle impurities such as sediment in the raw water. Because nanofiltration, reverse osmosis, etc. require a certain osmotic pressure during filtration, the raw water needs to be pressurized through a water pump.
  • the filter element can be reverse osmosis, nanofiltration, etc.
  • the raw water is first filtered by the first-stage filter element to produce pure water and wastewater respectively.
  • the pure water part flows out from the pure water port through the pure water channel, while the wastewater part is used as the raw water for the second-stage filter element. It flows through the second-stage filter element to continue filtration.
  • the filtered pure water flows out from the pure water port, and the waste water flows through the waste water solenoid valve and is discharged.
  • This disclosure uses staged filter element technology as a way to achieve high pure water rate.
  • By providing an optimally designed central tube it realizes staged filter element technology on the same central tube, that is, it realizes staged filtration on one filter element assembly.
  • the function achieves the purpose of improving the pure water rate of water purification, and at the same time solves the volume control problem caused by the staged filter element technology of multiple filter elements connected in series.
  • the central tube provided by this technical solution not only ensures that the fine filter element can perform staged filtration to improve the water purification rate, but can also be integrated with the post-taste filter element to improve the integration of the filter element and reduce the number of filter bottles used. , which is conducive to the small size design function of the whole machine.

Abstract

一种级段式滤芯和净水装置，级段式滤芯包括：第一滤芯（1）、第二滤芯（2）和支撑构件，支撑构件能同时对第一滤芯（1）和第二滤芯（2）进行支撑，原水能够经过第一滤芯（1）过滤，经过第一滤芯（1）过滤出的纯水能够进入支撑构件的内部并沿着支撑构件排出，经过第一滤芯（1）过滤出的浓水能够到达第二滤芯处（2）进行过滤，经过第二滤芯（2）过滤出的纯水也能够进入支撑构件的内部并沿着支撑构件排出，经过第二滤芯（2）过滤出的浓水能够通过浓水出口（4）并排出。

Description

一种级段式滤芯、级段式滤芯组件、净水装置和净水系统
本公开要求于2022年03月25日提交中国专利局、申请号为202210301840.6、发明名称为“一种级段式滤芯和净水装置”的中国专利申请的优先权，和要求于2022年03月25日提交中国专利局、申请号为202210300368.4、发明名称为“一种级段式滤芯组件和净水装置”的中国专利申请的优先权，以及要求于2022年03月25日提交中国专利局、申请号为202210300359.5、发明名称为“一种包含级段式滤芯的净水系统”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，具体涉及一种级段式滤芯、级段式滤芯组件、净水装置和净水系统。
背景技术
净水机的核心部件是滤芯，其中发挥主要净化效果的是使用的精细过滤滤芯，现有的净水机使用的精细过滤滤芯主要包括卷式反渗透和卷式纳滤膜滤芯，其均为卷式膜片结合打胶工艺卷制在中心管上，实现单级高精度过滤功能。随着净水机的发展，高产水率成为近年来净水机的一个发展趋势。在家用净水领域为了实现该趋势，现有的技术手段包括在精细过滤滤芯前添加化学阻垢滤芯，有效抑制二价离子结垢趋势从而提升产水率；还包括采用两支精细过滤滤芯串联，前一支滤芯的浓水作为第二支滤芯的原水而实现高产水率。以上两种途径实现净水产水率均具有很好的效果，但是也均存在其对应的问题，分别是化学阻垢物质释放影响水质卫生安全、多支滤芯串联使用不利于整机体积控制。
经过精细滤芯净化的水一般偏弱酸性，为了提升口感均需在后串联一支碳滤芯改善口感，串联滤芯带来的问题是整机设计复杂度增加，同时不利于整机体积控制。
高产水率作为净水机的发展趋势，其实现途径主要包括添加化学阻垢剂、 多个滤芯串联组成级段式过滤等。然而，虽然如上两种技术均可实现高回收率，但是其存在如下问题：
问题1：添加化学阻垢剂可以实现很好的阻垢效果提升净水产水率，但是存在阻垢物质释放带来卫生安全问题；
问题2：相比于单级滤芯，多个滤芯串联的级段技术回收率可以一定程度上的提升，但是对于追求体积的家用机来说技术路线待优化。
不通过化学阻垢剂实现高产水率，级段式滤芯技术具有很好的应用前景，但是多个滤芯串联的形式导致体积大，那么如在同一根中心管上实现级段式过滤功能，则可以有效发挥级段式过滤技术的特征，同时可解决多滤芯带来的体积问题。然而一个摆在眼前的问题是，同一根中心管实现级段式过滤功能，势必将中心管分段使用，会降低滤芯的有效流道长度从而影响滤芯使用寿命。
由于相关技术中的传统滤芯组件存在无法同时提高回收率的同时还能减小体积等技术问题，因此本公开研究设计出一种级段式滤芯、级段式滤芯组件、净水装置和净水系统。
发明内容
因此，本公开要解决的技术问题在于克服相关技术中的传统滤芯组件存在无法同时提高回收率的同时还能减小体积的缺陷，从而提供一种级段式滤芯、级段式滤芯组件、净水装置和净水系统。
本公开提供一种级段式滤芯，其包括：
第一滤芯、第二滤芯和支撑构件，所述支撑构件能同时对所述第一滤芯和所述第二滤芯进行支撑，原水能够经过所述第一滤芯过滤，经过所述第一滤芯过滤出的纯水能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第一滤芯过滤出的浓水能够到达所述第二滤芯处进行过滤，经过所述第二滤芯过滤出的纯水也能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第二滤芯过滤出的浓水能够通过浓水出口并被排出。
在一些实施方式中，所述支撑构件为中心管的结构，所述中心管为具有中空空腔的圆柱形管，其管壁上设置有贯穿内外壁的导流孔，所述导流孔包括与所述第一滤芯的位置相对的第一导流孔和与所述第二滤芯的位置相对的第二 导流孔，经过所述第一滤芯过滤出的纯水能够经过所述第一导流孔进入所述中心管的内部，经过所述第二滤芯过滤出的纯水能够经过所述第一导流孔进入所述中心管的内部。
在一些实施方式中，所述中心管沿其轴向依次包括第一轴段、第二轴段和第三轴段，所述第一轴段上开设所述第一导流孔，所述第三轴段上开设第二导流孔，所述第二轴段上不开设导流孔，所述第一滤芯缠绕在所述第一轴段的外周，所述第二滤芯缠绕在所述第三轴段的外周。
在一些实施方式中，所述中心管为注塑件；所述第一滤芯与所述第二滤芯间隔布置，且在间隔的部位设置有第一封水件，所述第一封水件与所述第二轴段相对；和/或，
所述第一轴段的轴向长度为D1，所述第二轴段的轴向长度为D2，所述第三轴段的轴向长度为D3，并有D1：D2＝1～2.5。
在一些实施方式中，所述中心管布置为其中心轴线沿着竖直方向，所述第一滤芯位于所述第二滤芯的上方，所述第一轴段、所述第二轴段和所述第三轴段从上至下依次连接，所述中心管的上端为封闭端，原水通过所述第一滤芯的上方进入所述第一滤芯中。
在一些实施方式中，所述中心管的下端为开口端，形成为纯水出口，所述第二滤芯的下端设置有第二封水件，所述第二封水件能够对水进行密封，且所述第二封水件的下端设置所述浓水出口。
在一些实施方式中，所述中心管还包括第四轴段和第五轴段，所述第五轴段上还开设有第三导流孔，所述级段式滤芯还包括第三滤芯，所述第一滤芯缠绕在所述第一轴段的外周，经过所述第二滤芯过滤出的浓水能够到达所述第三滤芯处进行过滤，经过所述第三滤芯过滤出的纯水也能够进入所述中心管的内部并沿着所述中心管被排出，经过所述第三滤芯过滤出的浓水能够通过所述浓水出口并被排出。
在一些实施方式中，所述支撑构件包括端盖组件、第一后置滤芯和第二后置滤芯，所述第一后置滤芯的内部具有第一中空空腔，所述第二后置滤芯的内部具有第二中空空腔，所述第一后置滤芯与所述第一滤芯相对，所述第一滤芯过滤出的纯水能够经过所述第一后置滤芯进一步过滤后并进入所述第一中空 空腔中，所述第二滤芯过滤出的纯水能够经过所述第二后置滤芯进一步过滤后并进入所述第二中空空腔中，所述第一中空空腔与所述第二中空空腔连通。
在一些实施方式中，所述端盖组件包括第一端盖、第二端盖和第三端盖，所述第一端盖连接设置在所述第一后置滤芯上且与所述第二后置滤芯相背的轴向一端，所述第二端盖连接设置在所述第一后置滤芯与所述第二后置滤芯之间，所述第三端盖连接设置在所述第二后置滤芯上且与所述第一后置滤芯相背的轴向一端。
在一些实施方式中，所述第一滤芯缠绕在所述第一后置滤芯的外周，所述第二滤芯缠绕在所述第二后置滤芯的外周，所述第一滤芯与所述第二滤芯间隔布置，且在间隔的部位设置有第一封水件，所述第一封水件与所述第二端盖相对。
在一些实施方式中，所述第一后置滤芯位于所述第二后置滤芯的上方，所述第一后置滤芯与所述第二后置滤芯的中心轴线重合并沿竖直方向延伸；
所述第一端盖、所述第二端盖和所述第三端盖从上至下依次间隔排布；
所述第一端盖的上端为封闭端，原水通过所述第一滤芯的上方进入所述第一滤芯中；
所述第三端盖的下端为开口端，形成为纯水出口，所述第二滤芯的下端设置有第二封水件，所述第二封水件能够对水进行密封，且所述第二封水件与所述第三端盖之间形成所述浓水出口。
在一些实施方式中，所述第一端盖、所述第二端盖和所述第三端盖均为注塑件；所述第一后置滤芯和所述第二后置滤芯均采用微孔滤材制成，所述微孔滤材的孔径为0.02～15μm。
在一些实施方式中，所述微孔滤材包括活性碳和陶瓷中的至少一种。
在一些实施方式中，所述第一后置滤芯的轴向一端与所述第一端盖粘接，所述第一后置滤芯的轴向另一端与所述第二端盖粘接；所述第二后置滤芯的轴向一端与所述第二端盖粘接，所述第二后置滤芯的轴向另一端与所述第三端盖粘接；
所述第一后置滤芯的外径小于等于所述第一端盖的外径，所述第一后置滤芯的外径也小于等于所述第二端盖的外径；
所述第二后置滤芯的外径小于等于所述第二端盖的外径，所述第二后置滤芯的外径也小于等于所述第三端盖的外径。
本公开还提供一种级段式滤芯组件，其包括前任一项所述的级段式滤芯，还包括：
滤瓶体和滤瓶盖，所述滤瓶体和所述滤瓶盖共同围成内部空腔，所述第一滤芯、所述第二滤芯和所述支撑构件均设置于所述内部空腔中。
在一些实施方式中，所述滤瓶盖盖设于所述滤瓶体的上端：
所述滤瓶体的下端设置有原水进口，所述支撑构件的下端形成纯水出口，所述滤瓶体的下端与所述支撑构件之间设置浓水出口；或者，所述滤瓶盖上设置有原水进口，所述支撑构件的下端形成纯水出口，所述滤瓶体的下端与所述支撑构件之间设置浓水出口。
在一些实施方式中，所述第一滤芯的上端与所述滤瓶盖之间形成能供水流通的第一间隙流道，所述第一滤芯的外周与所述滤瓶体之间形成能供水流通的第二间隙流道，所述第二滤芯的外周与所述滤瓶体之间形成能供水流通的第三间隙流道，所述第二滤芯的下端与所述滤瓶体之间形成能供水流通的第四间隙流道。
在一些实施方式中，当所述滤瓶体的下端设置有原水进口时，所述第二滤芯的下端还设置有第一封水件，所述第一封水件能对所述第二滤芯的下端的部分结构进行密封，所述第一封水件上设置有开口，以形成第一出口，能允许所述第二滤芯过滤出的浓水通过所述第一封水件向下流至所述浓水出口并排出；所述第一滤芯与所述第二滤芯的轴向之间的外周位置设置有第二封水件，以对第二封水件外周的原水与第二封水件内周的浓水进行密封；
在一些实施方式中，当所述滤瓶盖上设置原水进口时，所述第二滤芯的下端还设置有第一封水件，所述第一封水件能对所述第二滤芯的下端的部分结构进行密封，所述第一封水件上设置有开口，以形成第一出口，能允许所述第二滤芯过滤出的浓水通过所述第一出口向下流至所述浓水出口并排出；所述第一滤芯的外周与所述滤瓶体之间还设置有第二封水件，以对第二封水件上方的原水进行密封。
本公开还提供一种净水装置，其包括前任一项所述的级段式滤芯或前任一 项所述的级段式滤芯组件。
本公开提供一种包含级段式滤芯的净水系统，其包括：
级段式滤芯、预处理滤芯和后处理滤芯，所述级段式滤芯包括第一滤芯、第二滤芯和支撑构件，所述级段式滤芯还包括原水进口、纯水出口、浓水出口，所述预处理滤芯的出水能与所述原水进口连通，所述后处理滤芯的进水口能与所述纯水出口连通；
所述支撑构件能同时对所述第一滤芯和所述第二滤芯进行支撑，
原水能够经过所述第一滤芯过滤，经过所述第一滤芯过滤出的纯水能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第一滤芯过滤出的浓水能够到达所述第二滤芯处进行过滤，经过所述第二滤芯过滤出的纯水能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第二滤芯过滤出的浓水能够通过浓水出口并被排出；
所述预处理滤芯的出水能通过第一管路与所述原水进口连通，所述后处理滤芯的进水口能通过第二管路与所述纯水出口连通。
在一些实施方式中，还包括滤芯外壳，所述原水进口、所述纯水出口和所述浓水出口均设置在所述滤芯外壳的轴向第一端；或者，所述原水进口设置在所述滤芯外壳的轴向第一端，所述纯水出口和所述浓水出口均设置在所述滤芯外壳的轴向第二端。
在一些实施方式中，所述第一滤芯、所述第二滤芯和所述支撑构件均设置于同一所述滤芯外壳中；
所述第二滤芯位于所述第一滤芯的轴向一端，所述第二滤芯相对于所述第一滤芯而靠近所述原水进口设置，所述支撑构件同时位于所述第一滤芯和所述第二滤芯的径向内侧。
在一些实施方式中，所述原水进口、所述纯水出口和所述浓水出口均设置在所述滤芯外壳的上端；所述第一滤芯位于所述第二滤芯的下方，所述第一滤芯的下端与所述滤芯外壳之间形成能供水流通的第一间隙流道，所述第一滤芯的外周与所述滤芯外壳之间形成能供水流通的第二间隙流道，所述第二滤芯的外周与所述滤芯外壳之间形成能供水流通的第三间隙流道，所述第二滤芯的上端与所述滤芯外壳之间形成能供水流通的第四间隙流道。
在一些实施方式中，所述第二滤芯的上端还设置有第一封水件，所述第一封水件能对所述第二滤芯的上端的部分结构进行密封；所述第一滤芯与所述第二滤芯的轴向之间的外周位置设置有第二封水件，以对第二封水件外周的原水与第二封水件内周的浓水进行密封。
在一些实施方式中，所述第一滤芯的下端设置有第三封水件，所述第三封水件能对所述第一滤芯的下端的部分结构进行密封，所述第三封水件上设置有开口，以形成第一入口，能允许所述第一滤芯下方的水通过所述第一入口向上流入所述第一滤芯。
在一些实施方式中，所述第一滤芯的上端与所述第二滤芯的下端之间还设置有第四封水件，所述第四封水件能对所述第一滤芯的上端的部分结构进行密封，所述第四封水件上设置有开口，以形成第二入口，能允许所述第一滤芯过滤出的浓水通过所述第二入口向上流入所述第二滤芯；所述第一封水件上设置有开口，以形成第三出口，能允许所述第二滤芯过滤出的浓水通过所述第三出口向上流至所述浓水出口并排出。
在一些实施方式中，其中所述第一入口相对于所述第二入口靠近径向内侧设置，所述第三出口相对于所述第二入口靠近径向内侧设置；或者所述第一入口相对于所述第二入口靠近径向外侧设置，所述第三出口相对于所述第二入口靠近径向外侧设置。
在一些实施方式中，还包括第三管路、第四管路和第五管路、以及泵和废水阀，所述第三管路的一端与所述预处理滤芯的进口连通以通入原水，所述第四管路的一端与所述浓水出口连通以导出浓水或浓水，所述第五管路的一端与所述后处理滤芯的出口连通以导出纯水，所述第四管路上设置所述废水阀。
本公开提供的一种级段式滤芯、级段式滤芯组件、净水装置和净水系统具有如下有益效果：
1.本公开通过在同一支撑构件上设置第一和第二滤芯，第一滤芯过滤出的纯水从纯水出口排出，过滤出的浓水(杂质水)进入第二滤芯中过滤，形成至少一级两段式的过滤，相比于多支精细过滤滤芯串联实现级段式过滤技术，可实现在同一支中心管上的级段式滤芯过滤功能，能够提高对废水的回收利用率，由于现有的每个滤芯都需要一个膜壳，因此串联式滤芯需要多个膜壳，本公开 能够有效省掉膜壳等的体积，最终能够在提高回收率的同时还能减小体积，有效解决多支滤芯串联带来的整机体积控制问题；同一根中心管上实现级段式滤芯过滤技术，省去了滤芯串联的多滤瓶使用，可实现滤芯集成化设计，对降低滤芯和整机的体积具有重要的促进作用；相比于使用阻垢剂手段实现高回收率滤芯技术(通过一级两段(至少两段式)，不必采用阻垢剂)，级段式滤芯技术不存在阻垢物质释放带来的卫生安全问题。
2.本公开通过同一根中心管上实现级段式滤芯过滤技术，省去了滤芯串联的多滤瓶使用，可实现滤芯集成化设计，对降低滤芯和整机的体积具有重要的促进作用；本公开还通过将支撑构件包括端盖组件和两个后置滤芯的设置形式，在确保精细过滤滤芯发挥级段式过滤功能提升净水产水率的同时，还可实现与后置口感滤芯一体化提升滤芯集成度、降低滤瓶使用数量，利于整机小体积设计功能；精细过滤滤芯和后置口感滤芯一体化，有利于整机小体积设计。
3.本公开通过结构针对设计，在同一根中心管上实现级段式过滤功能的同时没有降低滤芯的有效流道长度，从而可实现高产水率的同时有效保障滤芯使用寿命。
附图说明
图1是相关技术的传统中心管的结构示意图；
图2是本公开第一实施方式的一级两段滤芯中心管(纯注塑件)的结构示意图(实施例1)；
图3是本公开第一实施方式的一级两段滤芯中心管(注塑件+滤材结合)的结构示意图(实施例2)；
图4是本公开图2中的中心管与滤芯配合的结构示意图(实施例1)；
图5是本公开图3中的中心管与滤芯配合的结构示意图(实施例2)；
图6是本公开第一实施方式的一级三段滤芯中心管(注塑件)的结构示意图(实施例3)。
图7是本公开第二实施方式的级段式滤芯组件实施例4的结构示意图；
图8是本公开第二实施方式的级段式滤芯组件实施例5的结构示意图；
图9是本公开第二实施方式的级段式滤芯的展开打胶胶线时的结构图；
图10是本公开第二实施方式的级段式滤芯的修模结构图；
图11是本公开第二实施方式的一级三段式级段式滤芯的打胶方式结构图；
图12是本公开第二实施方式的一级三段式滤芯修模后的结构示意图(实施例6；
图13是本公开第二实施方式中心管(纯注塑件)与滤芯配合的结构示意图；
图14是本公开第二实施方式中心管(注塑件+滤材结合)与滤芯配合的结构示意图；
图15是本公开第二实施方式的一级两段滤芯中心管(纯注塑件)的结构示意图。
图16是本公开第三实施方式的包含轴向一级两段滤芯的净水系统(短流道级段式滤芯)的示意图；
图17是本公开第三实施方式的包含轴向一级两段滤芯的净水系统(长流道级段式滤芯)的示意图；
图18是本公开第三实施方式的短流道级段式滤芯的结构示意图；
图19是本公开第三实施方式的长流道级段式滤芯的结构示意图；
图20是本公开第三实施方式的一级两段滤芯中心管(纯注塑件)的结构示意图(实施例7)；
图21是本公开第三实施方式的一级两段滤芯中心管(注塑件+滤材结合)的结构示意图(实施例8)；
图22是本公开图20中的中心管与滤芯配合的结构示意图(实施例7)；
图23是本公开图20中的中心管与滤芯配合的结构示意图(实施例8)；
图24是本公开第三实施方式的一级三段滤芯中心管(注塑件)的结构示意图(实施例9)。
图中附图标记表示为：
1、第一滤芯；2、第二滤芯；3、原水进口；4、浓水出口；5、中心管；51、第一轴段；52、第二轴段；53、第三轴段；54、第四轴段；55、第五轴段；61、第一导流孔；62、第二导流孔；63、第三导流孔；71、第一封水件；72、第二封水件；8、纯水出口；9、端盖组件；91、第一端盖；92、第二端盖；93、 第三端盖；10、第一后置滤芯；11、第二后置滤芯；
3a、中心管原水入孔；71a、第一出口；73、第一胶线；74、第二胶线；9、端盖组件；91、第一端盖；92、第二端盖；93、第三端盖；12、滤瓶体；13、滤瓶盖；14、进水隔网；15a、刀片一；15b、刀片二；15c、刀片三；15d、刀片四；16a、点一；16b、点二；16c、点三；16d、点四；17、空隙；101、第一间隙流道；102、第二间隙流道；103、第三间隙流道；104、第四间隙流道；
100、原水进口；200、纯水出口；300、浓水出口；400、第一管路；500、第二管路；600、第三管路；700、第四管路；800、第五管路；900、级段式滤芯；3b、滤芯外壳；101、第一间隙流道；102、第二间隙流道；103、第三间隙流道；104、第四间隙流道；71、第一封水件；71b、第三出口；72、第二封水件；73’、第三封水件；73a、第一入口；74’、第四封水件；74a、第二入口；20、预处理滤芯；21、后处理滤芯；22、泵；23、废水阀；24、控制部件。
具体实施方式
第一实施方式
如图2-6所示，本公开提供一种级段式滤芯，其包括：
第一滤芯1、第二滤芯2和支撑构件，所述支撑构件能同时对所述第一滤芯1和所述第二滤芯2进行支撑，原水能够经过所述第一滤芯1过滤，经过所述第一滤芯1过滤出的纯水能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第一滤芯1过滤出的浓水能够到达所述第二滤芯2处进行过滤，经过所述第二滤芯2过滤出的纯水也能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第二滤芯2过滤出的浓水能够通过浓水出口4并被排出。
本公开通过在同一支撑构件上设置第一和第二滤芯，第一滤芯过滤出的纯水从纯水出口排出，过滤出的浓水(杂质水)进入第二滤芯中过滤，形成至少一级两段式的过滤，相比于多支精细过滤滤芯串联实现级段式过滤技术，可实现在同一支中心管上的级段式滤芯过滤功能，能够提高对废水的回收利用率，由于现有的每个滤芯都需要一个膜壳，因此串联式滤芯需要多个膜壳，本公开能够有效省掉膜壳等的体积，最终能够在提高回收率的同时还能减小体积，有 效解决多支滤芯串联带来的整机体积控制问题；相比于使用阻垢剂手段实现高回收率滤芯技术(通过一级两段(至少两段式)，不必采用阻垢剂)，级段式滤芯技术不存在阻垢物质释放带来的卫生安全问题。
本公开通过滤芯打胶工艺设计并结合后期修膜工艺，在同一根中心管实现一级两段卷式膜滤芯级段式过滤技术，相比于现有单级滤芯过滤具有高产水率特征，相比于多只滤芯串联的级段式滤芯技术，集成式设计对于降低滤芯体积以及相应机型的体积具有促进作用。
一级两段解释：包含两部分滤芯，这两部分滤芯的过滤精度相同，所以称为一级；第一部分滤芯产生浓水，称为一段，第一部分的浓水又作为原水进入第二部分滤芯，同样产生浓水，称为第二段。总的来说，就是一级两段。
级：对应过滤进度
段：对应浓水产生次数
卷式膜滤芯，均为平板膜通过与胶水、胶带等作用，缠绕卷制在带有孔的中心管上。传统的单级精细过滤滤芯使用的中心管如图1所示，其材质一般为注塑件，中心管为圆柱形，开设有贯通的纯水导流孔，其纯水导流孔一般为均分分布；此外，在轴向上，中心管一端封闭，作用为将收集的纯水与其它水隔开；另一端敞开，被设置为导流出收集的纯水。
实施例1，如图2，4所示，在一些实施方式中，所述支撑构件为中心管5的结构，所述中心管5为具有中空空腔的圆柱形管，其管壁上设置有贯穿内外壁的导流孔，所述导流孔包括与所述第一滤芯1的位置相对的第一导流孔61和与所述第二滤芯2的位置相对的第二导流孔62，经过所述第一滤芯1过滤出的纯水能够经过所述第一导流孔61进入所述中心管5的内部，经过所述第二滤芯2过滤出的纯水能够经过所述第二导流孔62进入所述中心管5的内部。
这是本公开的实施例1的具体实施结构形式，本公开将支撑构件具体实施设置成中心管的结构(整体为注塑件)，能够在对第一和第二滤芯起到有效支撑的作用下，还能通过其上开设的第一导流孔有效地将第一滤芯过滤出的纯水导入中心管的内部空腔，并导出纯水，第二导流孔有效地将第二滤芯过滤出的纯水导入中心管的内部空腔并导出，而第一滤芯过滤出的杂质水(浓水)进入第二滤芯中进行过滤，能够有效提高对浓水的过滤效果，提高废水回收率，从 而提高产水量，同时减小了体积，使得结构更为紧凑。
图4为基于图2所示注塑件一级两段中心管的滤芯水路结构示意图，仅具备同一根中心管一级两段净化提升产水率功能。具体组成包括中心管、第一滤芯1、第二滤芯2，以及第一封水件71和第二封水件72。其中，原水从第一滤芯1靠近中心管尾端的端面进入，纯水经导流孔收集进中心管内，浓水则作为第二滤芯2的原水从靠近第一滤芯1浓水端进入，纯水经导流孔收集后与第一滤芯1的纯水汇合从纯水口排出，浓水则从端面排出。其中，第一封水件71的作用为将原水(外周都是原水)和第一滤芯1的浓水分隔开，第二封水件72的作用为将第二滤芯2的浓水和原水(外周都是原水)分隔开。
在一些实施方式中，所述中心管5沿其轴向依次包括第一轴段51、第二轴段52和第三轴段53，所述第一轴段51上开设所述第一导流孔61，所述第三轴段53上开设第二导流孔62，所述第二轴段52上不开设导流孔，所述第一滤芯1缠绕在所述第一轴段51的外周，所述第二滤芯2缠绕在所述第三轴段53的外周。本公开的中心管设置成沿轴向的第一、第二和第三轴段，第一轴段上开设第一导流孔，第一滤芯缠绕在第一轴段的外周，能够将第一滤芯过滤出的纯水通过第一导流孔导入中心管的内部空腔，第三轴段上开设第二导流孔，第二滤芯缠绕在第三轴段的外周，能够将第二滤芯过滤出的纯水通过第二导流孔导入中心管的内部空腔。同一根中心管上实现一级两段，需要在D1和D3之间预留一个D2的距离(即第二轴段)，目的为修膜时形成两部分滤芯，其中，D2的上端起始面为第一滤芯靠近第二滤芯的端面，终止面为第二滤芯靠近第一滤芯的端面。图2所述的一级两段中心管，可将传统多支滤芯串联的一级两段技术集成在同一支中心管上，实现高产水率的同时并减少滤瓶数量的使用。但是其过滤功能仅为精细过滤滤芯的净化功能，为单级净化。
在一些实施方式中，所述中心管5为注塑件；所述第一滤芯1与所述第二滤芯2间隔布置，且在间隔的部位设置有第一封水件71，所述第一封水件71与所述第二轴段52相对；和/或，
所述第一轴段51的轴向长度为D1，所述第二轴段52的轴向长度为D2，所述第三轴段53的轴向长度为D3，并有D1：D2＝1～2.5。
本公开的实施例1的中心管为整体注塑件(具体实施为整体塑料一体注塑 成型)，能够有效起到支撑滤芯内周的同时还能对纯水起到导流的作用；第一封水件被设置为将滤芯内部的浓水与外周的原水进行有效的隔开和分离，防止二者产生混合。本公开的技术方案中，以能实现一级两段功能的中心管为例进行说明。图2为可实现一级两段中心管的结构，相比于图1中的传统中心管，其纯水导流孔分两部分，具体为第一纯水导流孔(第一导流孔61)和第二纯水导流孔(第二导流孔62)第一导流孔61被设置为收集第一滤芯产生的纯水，其位置分布于D1区域内；第二导流孔62被设置为收集第二滤芯产生的纯水，其位置分布于D3区域内。为了实现一级两段，对D1区域和D2区域的长度比还有要求，其最优方案为D1：D2＝(1～2.5)：1之间，能够保证有效修膜的同时还能实现一级两段的过滤。
在一些实施方式中，所述中心管5布置为其中心轴线沿着竖直方向，所述第一滤芯1位于所述第二滤芯2的上方，所述第一轴段51、所述第二轴段52和所述第三轴段53从上至下依次连接，所述中心管5的上端为封闭端，原水通过所述第一滤芯1的上方(原水进口3)进入所述第一滤芯1中。这是本公开的中心管的具体实施结构形式，沿中心轴线竖直方向布置的中心管，形成从上之下的第一、第二和第三轴段，第一滤芯和第二滤芯也从上之下排布，中心管上端封闭，以不允许原水进入中心管内部，原水进口为第一滤芯的上方，原水进入第一滤芯中过滤，过滤出的纯水再通过第一导流孔进入中心管的内部。
在一些实施方式中，所述中心管5的下端为开口端，形成为纯水出口8，所述第二滤芯2的下端设置有第二封水件72，所述第二封水件72能够对水进行密封，且所述第二封水件72的下端设置所述浓水出口4。本公开的中心管下端为开口端能够有效形成纯水出口，以有效导出中心管中的纯水，本公开还通过第二封水件能够对第二滤芯的下端进行密封个分隔作用，并且第二封水件的下端与中心管之间形成浓水出口，以有效地将第二滤芯过滤出的杂质水导出。
实施例3，在一些实施方式中，所述中心管5还包括第四轴段54和第五轴段55，所述第五轴段55上还开设有第三导流孔63，所述级段式滤芯还包括第三滤芯，所述第一滤芯1缠绕在所述第一轴段51的外周，经过所述第二滤芯2过滤出的浓水能够到达所述第三滤芯处进行过滤，经过所述第三滤芯过滤出的纯水也能够进入所述中心管的内部并沿着所述中心管被排出，经过所述第三滤 芯过滤出的浓水能够通过所述浓水出口4并被排出。这是本公开的实施例3的具体实施结构形式，如图6所示，即其在轴向方向上设置为五个轴段，并且开始有三部分的导流孔，能够实现一级多段的净化过滤效果，配合级段式滤芯需求开设纯水导流孔位置，还可实现一级多段净化功能。
实施例2，如图3，5，在一些实施方式中，所述支撑构件包括端盖组件9、第一后置滤芯10和第二后置滤芯11，所述第一后置滤芯10的内部具有第一中空空腔，所述第二后置滤芯11的内部具有第二中空空腔，所述第一后置滤芯10与所述第一滤芯1相对，所述第一滤芯1过滤出的纯水能够经过所述第一后置滤芯10进一步过滤后并进入所述第一中空空腔中，所述第二滤芯2过滤出的纯水能够经过所述第二后置滤芯11进一步过滤后并进入所述第二中空空腔中，所述第一中空空腔与所述第二中空空腔连通。本公开还通过将支撑构件包括端盖组件和两个后置滤芯的设置形式，在确保精细过滤滤芯发挥级段式过滤功能提升净水产水率的同时，还可实现与后置口感滤芯一体化提升滤芯集成度、降低滤瓶使用数量，利于整机小体积设计功能；精细过滤滤芯和后置口感滤芯一体化，有利于整机小体积设计。
图5为基于图3所示注塑件一级两段中心管的滤芯水路结构示意图，其同时具备同一根中心管实现一级两段净化功能，提升产水率，同时可与后置滤芯实现紧密贴合，实现一个滤芯组件上两级净化功能。其结构与图4所示滤芯基本相同，差异点在中心管由注塑件和多微孔滤材结合而成，可实现一级两段净化提升产水率，同时可实现精细过滤滤芯产水原位净化，实现二合一滤芯结构。
在一些实施方式中，所述端盖组件9包括第一端盖91、第二端盖92和第三端盖93，所述第一端盖91连接设置在所述第一后置滤芯10上且与所述第二后置滤芯11相背的轴向一端，所述第二端盖92连接设置在所述第一后置滤芯10与所述第二后置滤芯11之间，所述第三端盖93连接设置在所述第二后置滤芯11上且与所述第一后置滤芯10相背的轴向一端。这是本公开的端盖组件的具体实施结构形式，即第一端盖被设置为对第一后置滤芯的一端进行支撑和固定，第二端盖被设置为对第一后置滤芯的另一端进行支撑和固定，第二端盖还能对第二后置滤芯的一端支撑固定，第三端盖对第二后置滤芯的另一端支撑固定。
图3所示的可实现一级两段功能的中心管，相比于图2，其组成由注塑件和过滤滤材共同组成，可实现精细过滤滤芯一级两段实现高产水率目的，同时可与精细过滤滤芯的后置滤芯原位复合形成两级过滤功能的级段式滤芯。具体组成包括第一端盖91、第二端盖92和第三端盖93，以及第一后置滤芯10和第二后置滤芯11。
所述3个端盖的外外径和有效内径相同，目的为方便初始滤芯制作；所述第一端盖91一端封口，目的为实现水路分离；所述第二端盖92两端连通，目的为实现水路导通；所述第三端盖93同样为两端连通，目的为将收集的纯水排出，同时其靠近出水端外表面具有密封凹槽特征，作用为实现水路分离。
在一些实施方式中，所述第一滤芯1缠绕在所述第一后置滤芯10的外周，所述第二滤芯2缠绕在所述第二后置滤芯11的外周，所述第一滤芯1与所述第二滤芯2间隔布置，且在间隔的部位设置有第一封水件71，所述第一封水件71与所述第二端盖92相对。第一滤芯缠绕在第一后置滤芯的外周，能够将第一滤芯过滤出的纯水通过径向向内输送至第一后置滤芯中进行进一步过滤净化，第二滤芯缠绕在第二后置滤芯的外周，能够将第二滤芯过滤出的纯水通过径向向内输送至第二后置滤芯中进行进一步过滤净化；通过第一封水件能够对其内周的浓水与外周的原水之间进行分隔密封，防止二者混合。
在一些实施方式中，所述第一后置滤芯10位于所述第二后置滤芯11的上方，所述第一后置滤芯10与所述第二后置滤芯11的中心轴线重合并沿竖直方向延伸；
所述第一端盖91、所述第二端盖92和所述第三端盖93从上至下依次间隔排布；
所述第一端盖91的上端为封闭端，原水通过所述第一滤芯1的上方进入所述第一滤芯1中；
所述第三端盖93的下端为开口端，形成为纯水出口8，所述第二滤芯2的下端设置有第二封水件72，所述第二封水件72能够对水进行密封，且所述第二封水件72与所述第三端盖93之间形成所述浓水出口4。
这是本公开的实施例2的具体实施结构形式，即竖直方向布置的第一和第二后置滤芯，能够使得原水从上至下流入第一滤芯中过滤，再将第一滤芯中的 浓水输送至第二滤芯中过滤，形成一级两段式的过滤结构，第三端盖下方形成的纯水开口能够有效将后置滤芯过滤后的纯水导出，浓水出口被设置为将第二滤芯过滤出的杂质水导出。
在一些实施方式中，所述第一端盖91、所述第二端盖92和所述第三端盖93均为注塑件；所述第一后置滤芯10和所述第二后置滤芯11均采用微孔滤材制成，所述微孔滤材的孔径为0.02～10pm。本公开的三个端盖均通过注塑件制成，能够有效起到支撑固定的作用，第一和第二后置滤芯采用微孔滤材制成能够对第一和第二滤芯过滤出的纯水进行进一步的精细过滤的作用，能够改善水的口感等，提高过滤精度。
在一些实施方式中，所述微孔滤材包括活性碳和陶瓷中的至少一种。相比于注塑件的可视孔，其可实现精细过滤滤芯的产水与后置滤芯实现面式接触，净化效果更佳。所述第一后置滤芯10和第二后置滤芯11的长度比例，在1～2.5之间为较优方案。
在一些实施方式中，所述第一后置滤芯10的轴向一端与所述第一端盖91粘接，所述第一后置滤芯10的轴向另一端与所述第二端盖92粘接；所述第二后置滤芯11的轴向一端与所述第二端盖92粘接，所述第二后置滤芯11的轴向另一端与所述第三端盖93粘接；
所述第一后置滤芯10的外径小于等于所述第一端盖91的外径，所述第一后置滤芯10的外径也小于等于所述第二端盖92的外径；
所述第二后置滤芯11的外径小于等于所述第二端盖92的外径，所述第二后置滤芯11的外径也小于等于所述第三端盖93的外径。
本公开的第一后置滤芯与两个端盖之间具体实施为通过粘接的方式固定，所述第一后置滤芯10为圆柱形，其外径≤第一端盖91和第二端盖92的外径，其内径与两个端盖的有效内径外壁相等，实现贴合，第一后置滤芯10和两个端盖的连接通过胶水粘接固定于相配合的端面上；
所述第二后置滤芯11为圆柱形，其外径≤第二端盖92和第三端盖93的外径，其内径与两个端盖的有效内径外壁相等，实现贴合，第二后置滤芯11和两个端盖的连接通过胶水粘接固定于相配合的端面上；
本公开还提供一种净水装置，其包括前任一项所述的级段式滤芯。
本公开以级段式滤芯技术为实现高产水率途径，通过提供一种优化设计的中心管，实现在同一支中心管上实现级段式滤芯技术，也即一支滤芯组件上实现级段式过滤功能达到提升净水产水率目的，同时解决多支滤芯串联的级段式滤芯技术带来的体积控制问题。此外，本技术方案提供的中心管，在确保精细过滤滤芯发挥级段式过滤功能提升净水产水率的同时，还可实现与后置口感滤芯一体化提升滤芯集成度、降低滤瓶使用数量，利于整机小体积设计功能。
第二实施方式
如图7-15所示，本公开提供一种级段式滤芯组件，其包括：
第一滤芯1、第二滤芯2、支撑构件、滤瓶体12和滤瓶盖13(其中第一滤芯1、第二滤芯2和支撑构件构成与第一实施方式中的相同结构的级段式滤芯)，所述支撑构件能同时对所述第一滤芯1和所述第二滤芯2进行支撑，原水能够经过所述第一滤芯1过滤，经过所述第一滤芯1过滤出的纯水能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第一滤芯1过滤出的浓水能够到达所述第二滤芯2处进行过滤，经过所述第二滤芯2过滤出的纯水也能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第二滤芯2过滤出的浓水能够通过浓水出口4并被排出；
所述滤瓶体12和所述滤瓶盖13共同围成内部空腔，所述第一滤芯1、所述第二滤芯2和所述支撑构件均设置于所述内部空腔中；所述第一滤芯1的上端不设置封水件。
为了解决阻垢剂、多个滤芯串联的级段式滤芯技术，以及单个滤芯为了实现高产水率而存在的问题，本公开提供一种共用中心管的级段式过滤卷式膜滤芯结构，前一级滤芯的浓水作为后一级滤芯的原水，从而达到高产水率的目的，避免了化学阻垢剂可能存在的化学物质释放问题、多个滤芯串联带来的体积问题，以及单个滤芯纯粹实现高产水率带来的滤芯污堵问题。
本公开通过在同一支撑构件上设置第一和第二滤芯，第一滤芯过滤出的纯水从纯水出口排出，过滤出的浓水(杂质水)进入第二滤芯中过滤，形成至少一级两段式的过滤，相比于多支精细过滤滤芯串联能够有效实现级段式过滤技术，可实现在同一支中心管上的级段式滤芯过滤功能，能够提高对废水的回收利用率，由于现有的每个滤芯都需要一个膜壳，因此串联式滤芯需要多个膜壳， 本公开能够有效省掉膜壳等的体积，最终能够在提高回收率的同时还能减小体积，有效解决多支滤芯串联带来的整机体积控制问题；同一根中心管上实现级段式滤芯过滤技术，省去了滤芯串联的多滤瓶使用，可实现滤芯集成化设计，对降低滤芯和整机的体积具有重要的促进作用；相比于使用阻垢剂手段实现高回收率滤芯技术(通过一级两段(至少两段式)，不必采用阻垢剂)，级段式滤芯技术不存在阻垢物质释放带来的卫生安全问题。
本公开：1)在同一根中心管上实现一级两段式滤芯过滤技术，减少了两支滤芯串联发挥一级两段过滤技术多个滤瓶的使用，实现滤芯集成化设计，对降低滤芯和整机的体积具有重要的促进作用；
2)相比于使用阻垢剂手段实现高回收率滤芯技术，级段式滤芯技术不存在阻垢物质释放带来的卫生安全问题；
3)相比于单个滤芯纯粹通过提高回收率实现高产水率，可通过控制流量、回收率关系实现高产水率，可有效延长滤芯使用寿命；
4)级段式滤芯技术，相比于单级滤芯技术，能提高滤芯净水产水率。
在一些实施方式中，所述滤瓶盖13盖设于所述滤瓶体12的上端：
所述滤瓶体12的下端设置有原水进口3，所述支撑构件的下端形成纯水出口8，所述滤瓶体12的下端与所述支撑构件之间设置浓水出口4；或者，所述滤瓶盖13上设置有原水进口3，所述支撑构件的下端形成纯水出口8，所述滤瓶体12的下端与所述支撑构件之间设置浓水出口4。这是本公开的两种不同的结构形式，即实施例4，如图7，原水从下端的滤瓶体下端进水，到达上端后再进入第一滤芯，再依次向下流动并过来，浓水出口和纯水出口均位于下端，最终将过滤出的纯水(不含杂质)和浓水(含杂质)分别通过纯水出口和浓水出口排出；实施例5，如图8，原水从上端的滤瓶盖进水，依次向下流动并过来，浓水出口和纯水出口均位于下端，最终将过滤出的纯水(不含杂质)和浓水(含杂质)分别通过纯水出口和浓水出口排出。
本公开提供了一种具有级段式过滤功能的集成式卷式膜滤芯及其结构，按照其结构特征，其可实现的级段式功能不限于一级两段，还包括一级三段，甚至更多段，因此可按照需要达到的净水产水率选择具体滤芯结构。本公开中，主要就同一根中心管实现一级两段功能的滤芯结构、制作方法进行说明，具体 如下：
本公开中的级段式滤芯关注于卷式膜滤芯领域，卷式膜包括纳滤、反渗透等。纳滤和反渗透滤芯，一般包含有三个水口，原水入口、浓水出口和纯水出口，按照其水口位置的排布有两种形式：1、三个水口同端分布；2、浓水出口和纯水出口一端排布、原水入口单独一端排布。如下基于同一根中心管实现一级两段过滤功能，按水口位置排布进行具体说明。
在一些实施方式中，所述第一滤芯1的上端与所述滤瓶盖13之间形成能供水流通的第一间隙流道101，所述第一滤芯1的外周与所述滤瓶体12之间形成能供水流通的第二间隙流道102，所述第二滤芯2的外周与所述滤瓶体12之间形成能供水流通的第三间隙流道103，所述第二滤芯2的下端与所述滤瓶体12之间形成能供水流通的第四间隙流道104。本公开通过第一滤芯上端与滤瓶盖之间的第一间隙流道、第一滤芯外周的第二间隙流道、第二滤芯外周的第三间隙流道和第二滤芯下端的第四间隙流道，能够使得如实施例所示的原水依次通过第四间隙流道、第三间隙流道、第二间隙流道和第一间隙流道而进入到第一滤芯的上端，并进入第一滤芯中，这是本公开的实施例4的具体实施结构形式。
在一些实施方式中，当所述滤瓶体12的下端设置有原水进口3时，所述第二滤芯2的下端还设置有第一封水件71，所述第一封水件71能对所述第二滤芯2的下端的部分结构进行密封，所述第一封水件71上设置有开口，以形成第一出口71a，能允许所述第二滤芯2过滤出的浓水通过所述第一封水件71向下流至所述浓水出口4并排出；所述第一滤芯1与所述第二滤芯2的轴向之间的外周位置设置有第二封水件72，以对第二封水件72外周的原水与第二封水件72内周的浓水进行密封；
当所述滤瓶盖13上设置原水进口3时，所述第二滤芯2的下端还设置有第一封水件71，所述第一封水件71能对所述第二滤芯2的下端的部分结构进行密封，所述第一封水件71上设置有开口，以形成第一出口71a，能允许所述第二滤芯2过滤出的浓水通过所述第一出口71a向下流至所述浓水出口4并排出；所述第一滤芯1的外周与所述滤瓶体12之间还设置有第二封水件72，以对第二封水件72上方的原水进行密封。
本公开实施例4，通过第二滤芯下端的第一封水件能够对第二滤芯下端的原水与第二滤芯过滤出的浓水之间进行分隔，通过第一和第二滤芯间隔位置的外周设置第二封水件能够有效对其内周的浓水与外周的原水之间进行分隔，本公开的实施例4的原水从下方进入第二滤芯与滤瓶体之间，并向上到达第一滤芯处，可沿径向方向进入第一滤芯中过滤，也可从第一滤芯的上方进入第一滤芯中进行过滤作用，过滤出的纯水从第一导流孔进入中心管的内部以排除，过滤出的纯水沿着轴向向下进入第二滤芯中进行过滤。
本公开实施例5，通过第二滤芯下端的第一封水件能够对第二滤芯下端的原水与第二滤芯过滤出的浓水之间进行分隔，通过第一滤芯和滤瓶体之间设置的第二封水件能够有效对其内周的浓水与外周的原水之间进行分隔，也防止原水从第一滤芯与滤瓶体之间的间隙处向下落下而无法起到有效过滤的作用，过滤出的纯水从第一导流孔进入中心管的内部以排除，过滤出的纯水沿着轴向向下进入第二滤芯中进行过滤。
1、水口同端分布。图7为水口同端排布的具有一级两段式过滤功能的集成式卷式膜滤芯结构示意图。原水从原水口进入滤瓶体内，经第二滤芯2外围达到第一滤芯1端部后，进入第一滤芯1内部进行过滤，纯水经中心管上纯水导流口(第一导流孔61)收集进入中心管中，浓水则进入第二滤芯2与第一滤芯1相对的端面，作为第二滤芯2的原水进行再次过滤净化，从而实现净水产水率的提高，纯水则经中心管上纯水导流口(第二导流孔62)收集与第一滤芯1的纯水汇合后从纯水出口流出，浓水则从浓水口排走。上述所述第一滤芯1和第二滤芯2为同一张膜页通过打胶和修膜形成，为同时形成非单独滤芯，后续部分有提及。
为了实现如上所述水路功能，还包括封水件(第一封水件71)和封水件(第二封水件72)。其中，第一封水件71主要是对第二滤芯2的浓水与第一滤芯1的原水进行分离，第一封水件71内腔套住第二滤芯2端部，外周与第二滤芯2外周通过胶带缠绕固定密封；第二封水件72主要是对第一滤芯1的浓水与原水进行分离，实现水流不互混，其位于第一滤芯1和第二滤芯2修膜后形成的空隙中，该封水件具有T型特征，T型部分进入空隙中，同时两端架在第一滤芯1和第二滤芯2的外周，最后通过胶带和两部分滤芯进行密封。
2、水口异端分布。图8为水口异端排布的具有一级两段式过滤功能的集成式卷式膜滤芯结构示意图。原水从原水口进入滤瓶中，经过中心管上原水入孔进入到第一滤芯1端面进行过滤，纯水经中心管上纯水导流口(第一导流孔61)收集，浓水则流入修膜后形成的空隙中，在压力驱动下进入第二滤芯2端面，作为滤芯的原水进行再次过滤净化，纯水经中心管上纯水导流口(第二导流孔62)收集与第一滤芯1的纯水汇合后经纯水口流出，浓水则从浓水口流出。
为了实现如上所述水路功能，水口异端分布的集成式滤芯还包括封水件(第一封水件71)和封水件(第二封水件72)。其中，第一封水件71与水口同端分布的位置、与第二滤芯2的固定方式及结构均相同，差异表现在作用上，第一封水件71的主要作用为对第二滤芯2的原水和第二滤芯2产水的浓水进行分离；第二封水件72位于第一滤芯1远离第二滤芯2的一侧，其整体形状呈Y形，大端靠近第一滤芯1端面，小端将第一滤芯1套入其中实现紧配，同时通过胶带和第一滤芯1外周面实现密封，其作用为对第一滤芯1的原水和产生的浓水实现分离。
以上提及的两种形式水口一级两段的滤芯，其差异点在于装配入滤瓶后的水路和密封；相同点为使用的基本的一级两段滤芯。如下为对基本滤芯的制作进行说明，包括胶线设置和修膜，具体如下：
胶线设置。本技术方案，为在同一根中心管上通过打胶和修膜实现级段式滤芯技术，图9为具体的打胶方式。将膜片按膜单元中提及的方式摆放好第一张膜页后，按图8进行打胶。因本技术方案为级段式滤芯技术，为滤芯集成设计，因此将第一、二级滤芯分别简称为滤芯一和滤芯二。从图8中可知，第一滤芯1和第二滤芯2的胶线，除靠近中心管除膜片上不打胶外，其它三边均打胶；第一滤芯1和第二滤芯2为两个单独完整的胶线，垂直于中心管的胶线，不与膜片外边缘重合，需要留一定距离被设置为卷指好滤芯、胶水固化后修膜用，以保证滤芯的密封性；每个滤芯的胶线宽度，均需要大于对应的滤芯导水口宽度，以防胶水正对导水口堵塞影响产水；第一滤芯1和第二滤芯2之间相邻的胶线需要留一个距离d1，预留d1的距离被设置为滤芯固化后修膜从而形成级段式滤芯(见修膜描述)；第二滤芯2的胶线位置靠近纯水出口端；每摆放的一张膜页，均需要按图9所示的打胶方式进行打胶，最后一张膜页放置完 后打胶再进行收卷，实现滤芯卷制为圆柱形，待胶水固化后进行修膜操作。
修膜。本技术方案中，为在同一根中心管上借助胶线设置和修膜实现级段式滤芯技术，具体修膜方式如图10所示。待滤芯固化后，使用相应的修膜刀片进行修膜，为了实现修膜，本技术方案以4刀片修膜方式进行说明。拿一根为未卷制滤芯的中心管，按刀片一对应点一，刀片二对应点二等位置调节好刀片位置，再启动修膜设备(不做具体说明)对需要去掉的膜进行去除，去除修剪部分得到修膜后的样品形式后第一滤芯1和第二滤芯2中间具有空隙，作用为第一滤芯1的浓水出水端，同时也作为第二滤芯2的原水进水端，实现一级两段式过滤。
通过采用本技术方案，得到修剪后的滤芯，对于第一滤芯1和第二滤芯2中间的空隙，具有不同的处理方式，在两种形式水口的滤芯处有进行说明。
以上为在同一根中心管上实现一级两段式的级段滤芯过滤技术的滤芯打胶及修膜处理的方式描述，获得的滤芯，相比于其它实现高产水率途径在安全性、体积、性能等方面具有优势。
此外，沿用本技术方案的滤芯结构，其还可实现一级三段式过滤功能，具体打胶工艺和修膜后滤芯状态见图11和图12，此处不做具体说明。
在一些实施方式中，所述支撑构件为中心管5的结构，所述中心管5为具有中空空腔的圆柱形管，其管壁上设置有贯穿内外壁的导流孔，所述导流孔包括与所述第一滤芯1的位置相对的第一导流孔61和与所述第二滤芯2的位置相对的第二导流孔62，经过所述第一滤芯1过滤出的纯水能够经过所述第一导流孔61进入所述中心管5的内部，经过所述第二滤芯2过滤出的纯水能够经过所述第二导流孔62进入所述中心管5的内部。
这是本公开的支撑构件的第一种具体实施结构形式，如图12，本公开将支撑构件具体实施设置成中心管的结构(整体为注塑件)，能够在对第一和第二滤芯起到有效支撑的作用下，还能通过其上开设的第一导流孔有效地将第一滤芯过滤出的纯水导入中心管的内部空腔，并导出纯水，第二导流孔有效地将第二滤芯过滤出的纯水导入中心管的内部空腔并导出，而第一滤芯过滤出的杂质水(浓水)进入第二滤芯中进行过滤，能够有效提高对浓水的过滤效果，提高废水回收率，从而提高产水量，同时减小了体积，使得结构更为紧凑。
原水从第一滤芯1靠近中心管尾端的端面进入，纯水经导流孔收集进中心管内，浓水则作为第二滤芯2的原水从靠近第一滤芯1浓水端进入，纯水经导流孔收集后与第一滤芯1的纯水汇合从纯水口排出，浓水则从端面排出。
在一些实施方式中，所述中心管5沿其轴向依次包括第一轴段51、第二轴段52和第三轴段53，所述第一轴段51上开设所述第一导流孔61，所述第三轴段53上开设第二导流孔62，所述第二轴段52上不开设导流孔，所述第一滤芯1缠绕在所述第一轴段51的外周，所述第二滤芯2缠绕在所述第三轴段53的外周。公开的中心管具体实施设置成沿轴向的第一、第二和第三轴段，第一轴段上开设第一导流孔，第一滤芯缠绕在第一轴段的外周，能够将第一滤芯过滤出的纯水通过第一导流孔导入中心管的内部空腔，第三轴段上开设第二导流孔，第二滤芯缠绕在第三轴段的外周，能够将第二滤芯过滤出的纯水通过第二导流孔导入中心管的内部空腔。如图9，同一根中心管上实现一级两段，需要在D1和D3之间预留一个D2的距离(D1指第一滤芯轴向上的长度，D3指第二滤芯轴向上的长度，D2为两滤芯之间间隔的轴向长度)，目的为修膜时形成两部分滤芯，其中，D2的上端起始面为第一滤芯靠近第二滤芯的端面，终止面为第二滤芯靠近第一滤芯的端面。本公开的一级两段中心管，可将传统多支滤芯串联的一级两段技术集成在同一支中心管上，实现高产水率的同时并减少滤瓶数量的使用。但是其过滤功能仅为精细过滤滤芯的净化功能，为单级净化。
在一些实施方式中，所述中心管5为注塑件；所述中心管5布置为其中心轴线沿着竖直方向，所述第一滤芯1位于所述第二滤芯2的上方，所述第一轴段51、所述第二轴段52和所述第三轴段53从上至下依次连接，所述中心管5的上端为封闭端，原水通过所述第一滤芯1的上方进入所述第一滤芯1中。
本公开的中心管具体实施为整体注塑件(具体实施方式为整体塑料一体注塑成型)，能够有效起到支撑滤芯内周的同时还能对纯水起到导流的作用；沿中心轴线竖直方向布置的中心管，形成从上至下的第一、第二和第三轴段，第一滤芯和第二滤芯也从上至下排布，中心管上端封闭，以不允许原水进入中心管内部，原水进口为第一滤芯的上方，原水进入第一滤芯中过滤，过滤出的纯水再通过第一导流孔进入中心管的内部。
如图11-12所示，在一些实施方式中，所述中心管5还包括第四轴段54和第五轴段55，所述第五轴段55上还开设有第三导流孔63，所述级段式滤芯还包括第三滤芯，所述第一滤芯1缠绕在所述第一轴段51的外周，经过所述第二滤芯2过滤出的浓水能够到达所述第三滤芯处进行过滤，经过所述第三滤芯过滤出的纯水也能够进入所述中心管的内部并沿着所述中心管被排出，经过所述第三滤芯过滤出的浓水能够通过所述浓水出口4并被排出。这是本公开的实施例6的具体实施结构形式，如图12所示，即其在轴向方向上设置为五个轴段，并且开始有三部分的导流孔，能够实现一级多段的净化过滤效果，配合级段式滤芯需求开设纯水导流孔位置，还可实现一级多段净化功能。
如图14，在一些实施方式中，所述支撑构件包括端盖组件9、第一后置滤芯10和第二后置滤芯11，所述第一后置滤芯10的内部具有第一中空空腔，所述第二后置滤芯11的内部具有第二中空空腔，所述第一后置滤芯10与所述第一滤芯1相对，所述第一滤芯1过滤出的纯水能够经过所述第一后置滤芯10进一步过滤后并进入所述第一中空空腔中，所述第二滤芯2过滤出的纯水能够经过所述第二后置滤芯11进一步过滤后并进入所述第二中空空腔中，所述第一中空空腔与所述第二中空空腔连通。这是本公开的支撑构件的另外一种具体实施结构形式，即支撑构件包括端盖组件和两个后置滤芯的设置形式，在确保精细过滤滤芯发挥级段式过滤功能提升净水产水率的同时，还可实现与后置口感滤芯一体化提升滤芯集成度、降低滤瓶使用数量，利于整机小体积设计功能；精细过滤滤芯和后置口感滤芯一体化，有利于整机小体积设计。
本公开的级段式滤芯组件具备一级两段净化功能，提升产水率，同时可与后置滤芯实现紧密贴合，实现一个滤芯组件上两级净化功能。其结构与纯注塑件的中心管滤芯基本相同，差异点在中心管由注塑件和多微孔滤材结合而成，可实现一级两段净化提升产水率，同时可实现精细过滤滤芯产水原位净化，实现二合一滤芯结构。
在一些实施方式中，所述第一滤芯1缠绕在所述第一后置滤芯10的外周，所述第二滤芯2缠绕在所述第二后置滤芯11的外周，所述第一滤芯1与所述第二滤芯2间隔布置，且在间隔的部位设置所述第一封水件71，所述第一封水件71与所述第二端盖92相对。第一滤芯缠绕在第一后置滤芯的外周，能够将 第一滤芯过滤出的纯水通过径向向内输送至第一后置滤芯中进行进一步过滤净化，第二滤芯缠绕在第二后置滤芯的外周，能够将第二滤芯过滤出的纯水通过径向向内输送至第二后置滤芯中进行进一步过滤净化；通过第一封水件能够对其内周的浓水与外周的原水之间进行分隔密封，防止二者混合。
在一些实施方式中，所述端盖组件9包括第一端盖91、第二端盖92和第三端盖93，所述第一端盖91连接设置在所述第一后置滤芯10上且与所述第二后置滤芯11相背的轴向一端，所述第二端盖92连接设置在所述第一后置滤芯10与所述第二后置滤芯11之间，所述第三端盖93连接设置在所述第二后置滤芯11上且与所述第一后置滤芯10相背的轴向一端。这是本公开的端盖组件的具体实施结构形式，即第一端盖被设置为对第一后置滤芯的一端进行支撑和固定，第二端盖被设置为对第一后置滤芯的另一端进行支撑和固定，第二端盖还能对第二后置滤芯的一端支撑固定，第三端盖对第二后置滤芯的另一端支撑固定。
图14所示的支撑构件由注塑件和过滤滤材共同组成，可实现精细过滤滤芯一级两段实现高产水率目的，同时可与精细过滤滤芯的后置滤芯原位复合形成两级过滤功能的级段式滤芯。具体组成包括第一端盖91、第二端盖92和第三端盖93，以及第一后置滤芯10和第二后置滤芯11。
所述3个端盖的外外径和有效内径相同，目的为方便初始滤芯制作；所述第一端盖91一端封口，目的为实现水路分离；所述第二端盖92两端连通，目的为实现水路导通；所述第三端盖93同样为两端连通，目的为将收集的纯水排出，同时其靠近出水端外表面具有密封凹槽特征，作用为实现水路分离。
在一些实施方式中，所述第一后置滤芯10位于所述第二后置滤芯11的上方，所述第一后置滤芯10与所述第二后置滤芯11的中心轴线重合并沿竖直方向延伸；
所述第一端盖91、所述第二端盖92和所述第三端盖93从上至下依次间隔排布；
所述第一端盖91的上端为封闭端，原水通过所述第一滤芯1的上方进入所述第一滤芯1中；
所述第三端盖93的下端为开口端，形成为纯水出口8，所述第二滤芯2 的下端设置有第二封水件72，所述第二封水件72能够对水进行密封，且所述第二封水件72与所述第三端盖93之间形成所述浓水出口4。
这是本公开的注塑件+滤材组合的支撑构件的具体实施结构形式，即竖直方向布置的第一和第二后置滤芯，能够使得原水从上至下流入第一滤芯中过滤，再将第一滤芯中的浓水输送至第二滤芯中过滤，形成一级两段式的过滤结构，第三端盖下方形成的纯水开口能够有效将后置滤芯过滤后的纯水导出，浓水出口被设置为将第二滤芯过滤出的杂质水导出。
在一些实施方式中，所述第一端盖91、所述第二端盖92和所述第三端盖93均为注塑件；所述第一后置滤芯10和所述第二后置滤芯11均采用微孔滤材制成，所述微孔滤材的孔径为0.02～15um。本公开的三个端盖均通过注塑件制成，能够有效起到支撑固定的作用，第一和第二后置滤芯采用微孔滤材制成能够对第一和第二滤芯过滤出的纯水进行进一步的精细过滤的作用，能够改善水的口感等，提高过滤精度。
在一些实施方式中，所述微孔滤材包括活性碳和陶瓷中的至少一种。相比于注塑件的可视孔，其可实现精细过滤滤芯的产水与后置滤芯实现面式接触，净化效果更佳。所述第一后置滤芯10和第二后置滤芯11的长度比例，在1～2.5之间为较优方案。
在一些实施方式中，所述第一后置滤芯10的轴向一端与所述第一端盖91粘接，所述第一后置滤芯10的轴向另一端与所述第二端盖92粘接；所述第二后置滤芯11的轴向一端与所述第二端盖92粘接，所述第二后置滤芯11的轴向另一端与所述第三端盖93粘接；
所述第一后置滤芯10的外径小于等于所述第一端盖91的外径，所述第一后置滤芯10的外径也小于等于所述第二端盖92的外径；
所述第二后置滤芯11的外径小于等于所述第二端盖92的外径，所述第二后置滤芯11的外径也小于等于所述第三端盖93的外径。
本公开的第一后置滤芯与两个端盖之间具体实施为通过粘接的方式固定，所述第一后置滤芯10为圆柱形，其外径≤第一端盖91和第二端盖92的外径，其内径与两个端盖的有效内径外壁相等，实现贴合，第一后置滤芯10和两个端盖的连接通过胶水粘接固定于相配合的端面上；
所述第二后置滤芯11为圆柱形，其外径≤第二端盖92和第三端盖93的外径，其内径与两个端盖的有效内径外壁相等，实现贴合，第二后置滤芯11和两个端盖的连接通过胶水粘接固定于相配合的端面上。
本公开还提供一种净水装置，其包括前任一项所述的级段式滤芯组件。
本公开提供了一种具有级段式过滤功能的集成式卷式膜滤芯，相比于传统多支滤芯串联实现级段式功能，其可共用一根中心管实现，对降低滤芯体积具有促进作用，且具备级段式滤芯过滤技术高产水率的特征；同时，结合本技术方案提供的滤芯特征，其可实现的级段式功能不限于一级两段，包括一级多段功能(≥2段)，因此净水产水率具有可调节特征。
本公开还通过将支撑构件包括端盖组件和两个后置滤芯的设置形式，在确保精细过滤滤芯发挥级段式过滤功能提升净水产水率的同时，还可实现与后置口感滤芯一体化提升滤芯集成度、降低滤瓶使用数量，利于整机小体积设计功能；精细过滤滤芯和后置口感滤芯一体化，有利于整机小体积设计。
本公开通过结构针对设计，在同一根中心管上实现级段式过滤功能的同时没有降低滤芯的有效流道长度，从而可实现高产水率的同时有效保障滤芯使用寿命；本公开还通过第一滤芯和第二滤芯的轴向端和径向端设置的密封结构以及间隙通道，形成紧凑型流道结构，提高过滤效率。本公开提供了一种具有级段式过滤功能的集成式卷式膜滤芯，相比于传统多支滤芯串联实现级段式功能，其可共用一根中心管实现，对降低滤芯体积具有促进作用，且具备级段式滤芯过滤技术高产水率的特征；同时，结合本技术方案提供的滤芯特征，其可实现的级段式功能不限于一级两段，包括一级多段功能(≥2段)，因此净水产水率具有可调节特征。
第三实施方式
如图16-24所示，本公开还提供一种包含级段式滤芯的净水系统，其包括：
级段式滤芯900、预处理滤芯20和后处理滤芯21，所述级段式滤芯900包括一级多段滤芯、支撑构件、原水进口100、纯水出口200、浓水出口300，所述支撑构件能同时对所述一级多段滤芯进行支撑，所述预处理滤芯20的出水能与所述原水进口100连通，所述后处理滤芯21的进水口能与所述纯水出口200连通；所述一级多段滤芯包括：第一滤芯1(即第一段滤芯)、第二滤 芯2(即第二段滤芯)(其中第一滤芯1、第二滤芯2和支撑构件构成与第一实施方式中相同结构的级段式滤芯，一级多段滤芯即第一滤芯和第二滤芯组合的结构)，所述支撑构件能同时对所述第一滤芯1和所述第二滤芯2进行支撑，原水能够经过所述第一滤芯1过滤，经过所述第一滤芯1过滤出的纯水能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第一滤芯1过滤出的浓水能够到达所述第二滤芯2处进行过滤，经过所述第二滤芯2过滤出的纯水也能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第二滤芯2过滤出的浓水能够通过浓水出口300并被排出；
所述预处理滤芯20的出水能通过第一管路400与所述原水进口100连通，所述后处理滤芯21的进水口能通过第二管路500与所述纯水出口200连通。
本公开形成至少一级两段式的过滤，能够实现在同一支撑构件的级段式滤芯过滤功能，提高对浓水的回收利用率，本公开还能有效省掉膜壳等的体积，在提高回收率的同时还能减小体积，有效解决多支滤芯串联带来的整机体积控制问题；级段式滤芯技术不存在阻垢物质释放带来的卫生安全问题。本公开通过水流流场的改变，使得膜面流速产生差异，产生膜面结垢区域划分的效果(先结垢的区域为靠近浓水出水口端)，还能有效提高滤芯和净水系统的使用寿命，使得本公开的净水系统还能具有“长寿命”的技术效果。
本公开通过在同一支撑构件上设置第一和第二滤芯，第一滤芯过滤出的纯水从纯水出口排出，过滤出的浓水杂质水进入第二滤芯中过滤，形成至少一级两段式的过滤，相比于多支精细过滤滤芯串联实现级段式过滤技术，可实现在同一支中心管上的级段式滤芯过滤功能，能够提高对浓水的回收利用率，由于现有的每个滤芯都需要一个膜壳，因此串联式滤芯需要多个膜壳，本公开能够有效省掉膜壳等的体积，最终能够在提高回收率的同时还能减小体积，有效解决多支滤芯串联带来的整机体积控制问题；相比于使用阻垢剂手段实现高回收率滤芯技术(通过一级两段(至少两段式)，不必采用阻垢剂)，级段式滤芯技术不存在阻垢物质释放带来的卫生安全问题。本公开通过水流流场的改变，使得膜面流速产生差异，产生膜面结垢区域划分的效果(先结垢的区域为靠近浓水出水口端)，还能有效提高滤芯和净水系统的使用寿命，使得本公开的净 水系统还能具有“长寿命”的技术效果。
本公开通过滤芯打胶工艺设计并结合后期修膜工艺，在同一根中心管实现一级两段卷式膜滤芯级段式过滤技术，相比于现有单级滤芯过滤具有高纯水率特征，相比于多只滤芯串联的级段式滤芯技术，集成式设计对于降低滤芯体积以及相应机型的体积具有促进作用。
一级两段解释：包含两部分滤芯，第一部分滤芯的纯水和第二部分滤芯的纯水汇合收集，均未进行二次精滤，所以称为一级；第一部分滤芯产生浓水，称为一段，第一部分的浓水又作为原水进入第二部分滤芯，同样产生浓水，称为第二段。总的来说，就是一级两段。
本公开提出的一种一级两段滤芯的净水系统，包含预处理滤芯、泵、一级两段式复合滤芯、后处理滤芯等核心部件，其中预处理滤芯为碳、PP棉、超滤等前置过滤元件，原水经水口进入预处理滤芯进行第一步初过滤，滤除原水中的泥沙等大颗粒杂质。因纳滤、反渗透等在过滤时需要一定的渗透压，所以需要通过水泵对原水加压，加压后经过核心一级两段式复合滤芯，滤芯可为反渗透、纳滤等。在制水过程中，原水先经过第一级滤芯过滤，分别产生出纯水和废水，其中纯水部分经由纯水流道从纯水口流出，而废水部分则作为第二级滤芯的原水，流经第二级滤芯继续过滤，过滤后的纯水由纯水口流出，废水则流经废水电磁阀再排出。该过程可分两种方式实现：1、轴向式(第一级滤芯在第二级滤芯下方)，2、径向式(第一级滤芯包围第二级滤芯)。在冲洗过程中，废水电磁阀打开，因滤芯膜前压力消失，滤芯无法起到过滤作用，则水流经过滤芯，带走其表面的赃污后由废水口流出，达到对滤芯清洁的目的。后处理滤芯可为：活性炭、超滤等，纯水经后处理滤芯改善口感后流出饮用。
制水时，废水阀关闭，原水从水口进入预处理滤芯进行初级处理，经泵加压后，预处理后的原水经原水口进入一级两段滤芯，原水先后经过第一级滤芯和第二级滤芯，产水从纯水口流入后处理滤芯，后处理滤芯处理后纯水经纯水 口流出；第一级滤芯产生的废水作为第二级滤芯的原水进行过滤处理，产水与第一级产水共同流入后处理滤芯再经纯水口流出，废水经浓水口流出。
冲洗时，废水阀打开，原水经与处理滤芯后利用高速水流冲刷滤芯表面，滤芯表面的脏污随水流从废水口水口排出。
级：对应纯水，下一部分滤芯的原水为上一部分滤芯的纯水。
段：对应浓水，下一部分滤芯的原水为上一部分滤芯的浓水。
在一些实施方式中，还包括滤芯外壳3b(即膜壳)，所述原水进口100、所述纯水出口200和所述浓水出口300均设置在所述滤芯外壳3b的轴向第一端；或者，所述原水进口100设置在所述滤芯外壳3b的轴向第一端，所述纯水出口200和所述浓水出口300均设置在所述滤芯外壳3b的轴向第二端。
在一些实施方式中，所述第一滤芯1、所述第二滤芯2和所述支撑构件均设置于同一所述滤芯外壳3b中；
所述第二滤芯2位于所述第一滤芯1的轴向一端，所述第二滤芯2相对于所述第一滤芯1而靠近所述原水进口100设置，所述支撑构件同时位于所述第一滤芯1和所述第二滤芯2的径向内侧。
这是本公开的级段式滤芯的具体实施结构形式，通过滤芯外壳能够限定出外壳形状，其内部设置第一段和第二滤芯和支撑构件，支撑构件用来限定第一和第二滤芯，使得第一滤芯与第二滤芯在轴向方向上上下布置，使得水从下端的第一滤芯过滤并由上端的纯水出口送出，未进入第一滤芯中的水再到达第二滤芯处过滤，形成一级两段的过滤结构形式，提高对废水的利用效率和回收效率。
在一些实施方式中，所述原水进口100、所述纯水出口200和所述浓水出口300均设置在所述滤芯外壳3b的上端。
在一些实施方式中，所述第一滤芯1位于所述第二滤芯2的下方，所述第一滤芯1的下端与所述滤芯外壳3b之间形成能供水流通的第一间隙流道101，所述第一滤芯1的外周与所述滤芯外壳3b之间形成能供水流通的第二间隙流道102，所述第二滤芯2的外周与所述滤芯外壳3b之间形成能供水流通的第三间隙流道103，所述第二滤芯2的上端与所述滤芯外壳3b之间形成能供水流通的第四间隙流道104。本公开通过第一滤芯下端与滤芯外壳之间的第一间隙流 道、第一滤芯外周的第二间隙流道、第二滤芯外周的第三间隙流道和第二滤芯上端的第四间隙流道，能够使得如实施例所示的原水依次通过第四间隙流道、第三间隙流道、第二间隙流道和第一间隙流道而进入到第一滤芯的下端，并进入第一滤芯中，进一步进行过滤净化。
如图16和18，短流道实施例，在一些实施方式中，所述第二滤芯2的上端还设置有第一封水件71，所述第一封水件71能对所述第二滤芯2的上端的部分结构进行密封；所述第一滤芯1与所述第二滤芯2的轴向之间的外周位置设置有第二封水件72，以对第二封水件72外周的原水与第二封水件72内周的浓水进行密封。
本公开的短流道级段式滤芯结构，通过第二滤芯上端的第一封水件能够对第二滤芯使得的原水与第二滤芯过滤出的浓水之间进行分隔，通过第一和第二滤芯间隔位置的外周设置第二封水件能够有效对其内周的浓水与外周的原水之间进行分隔，本公开的短流道结构的原水从下方进入第一滤芯与外壳之间，并向上到达第一滤芯处，可沿轴向方向进入第一滤芯中过滤，过滤出的纯水从第一导流孔进入中心管的内部以排除，过滤出的纯水沿着轴向向上进入第二滤芯中进行过滤。
本公开的短流道级段式滤芯结构，通过第二滤芯上端的第一封水件能够对第二滤芯上端的原水与第二滤芯过滤出的浓水之间进行分隔，通过第一滤芯和外壳之间设置的第二封水件能够有效对其内周的浓水与外周的原水之间进行分隔，也防止原水从第一滤芯与外壳之间的间隙处向下落下而无法起到有效过滤的作用，过滤出的纯水从第一导流孔进入中心管的内部以排除，过滤出的纯水沿着轴向向上进入第二滤芯中进行过滤。
如图17和19，长流道实施例，在一些实施方式中，所述第一滤芯1的下端设置有第三封水件73’，所述第三封水件73’能对所述第一滤芯1的下端的部分结构进行密封，所述第三封水件73’上设置有开口，以形成第一入口73a，能允许所述第一滤芯1下方的水通过所述第一入口73a向上流入所述第一滤芯1。
这是本公开的长流道的具体实施结构形式，第三封水件以及其上开设的第一入口、第四封水件和第三出口，能够有效地保证水只能从第一入口进入第一 滤芯中过滤，而第一滤芯中过滤出的浓水只能通过第二入口进入第二滤芯中过滤，而第二滤芯中过滤出的浓水只能通过第三出口被有效地导出，从浓水出口排出，而第一入口和第二入口位于径向方向的不同端能够增长水在第一滤芯中的沿径向方向的流动路径，防止水沿着轴向未有效的过滤便被排出，从而提高第一滤芯的过滤效果；第二入口和第三出口位于径向方向的不同端能够增长水在第二滤芯中的沿径向方向的流动路径，防止水沿着轴向未有效的过滤便被排出，从而提高第二滤芯的过滤效果。
在一些实施方式中，所述第一滤芯1的上端与所述第二滤芯2的下端之间还设置有第四封水件74’，所述第四封水件74’能对所述第一滤芯1的上端的部分结构进行密封，所述第四封水件74’上设置有开口，以形成第二入口74a，能允许所述第一滤芯1过滤出的浓水通过所述第二入口74a向上流入所述第二滤芯2；所述第一封水件71上设置有开口，以形成第三出口71b，能允许所述第二滤芯2过滤出的浓水通过所述第三出口71b向上流至所述浓水出口300并排出。
在一些实施方式中，其中所述第一入口73a相对于所述第二入口74a靠近径向内侧设置，所述第三出口71b相对于所述第二入口74a靠近径向内侧设置；或者所述第一入口73a相对于所述第二入口74a靠近径向外侧设置，所述第三出口71b相对于所述第二入口74a靠近径向外侧设置。
水口同端分布滤芯方案。图19为水口同端分布的长流道、一级两段式集成式卷式膜滤芯结构示意图。原水从滤瓶提原水口进入，依次经过封水件(第一封水件71)、第二滤芯2、封水件(第二封水件72)、第一滤芯1外部后，到达封水件(第三封水件73’)入口，从该入口进入第一滤芯1端面进行过滤净化，纯水经中心管上纯水导流口(第一导流孔61)收集，浓水则沿第一滤芯1轴向过滤从封水件(第二封水件72)的入口进入第二滤芯2端面，第一滤芯1的浓水作为第二滤芯2的原水进行再次过滤，实现产水率提高，第二滤芯2的纯水经中心管上纯水导流口(第二导流孔62)收集后与第一滤芯1的纯水汇合，通过中心管上的纯水口排出，浓水则从封水件(第一封水件71)的出口排出，到达滤瓶体浓水排出口排出。
其中，封水件(第三封水件73’)作用为实现第一滤芯1的原水和第一滤 芯1的浓水分隔，同时结合胶水与第一滤芯1的端面密封，留下入口实现第一滤芯1的长流道特征；封水件(第二封水件72)的作用为实现第一滤芯1的原水和第一滤芯1的浓水分隔，同时结合胶水实现与第一滤芯1和滤芯相接触的端面实现密封，留下入口，与封水件(第一封水件71)和封水件(第三封水件73’)共同作用，实现两段滤芯的长流道特征；封水件(第四封水件74’)的作用对第一滤芯1的原水和第二滤芯2的浓水实现分隔，同时结合胶水与封水件(第一封水件71)接触第二滤芯2的端面通密封，留下出口实现第二滤芯2内部长流道特征。
其中，封水件(第三封水件73’)-第一入口73a的位置与封水件(第四封水件74’)-第二入口74a的位置为对角分布关系，目的为避免水流取向走短流道影响滤芯寿命；封水件(第四封水件74’)-第二入口74a和封水件(第一封水件71)-第三出口71b的位置同样为对角分布关系，目的也为避免水流取向走短流道影响滤芯寿命。
其中，封水件(第三封水件73’)主体为类圆柱形，与第一滤芯1外周通过胶带粘贴实现固定和密封；封水件(第二封水件72)为主体为可展开倒T形，其尖端部分与中心管外表面对应的凹槽通过胶水密封，同时尖端部分两端与第一滤芯1和第二滤芯2接触的断面通过胶水密封，封水件(第二封水件72)尖端嵌入第一滤芯1和第二滤芯2中间的空隙并打胶固定后，形成包裹第一滤芯1、第二滤芯2的圆形，其外表面与第一滤芯1和第二滤芯2分别通过胶带粘贴实现密封；封水件(第一封水件71)主体为类圆柱形，将第二滤芯2套入其内腔中，外表面和第二滤芯2通过胶带粘贴密封固定，同时封水件远离第二滤芯2的底部具有密封圈设置位置，被设置为与滤瓶内部对应位置实现安装密封达到水路分离目的。
卷式膜滤芯，均为平板膜通过与胶水、胶带等作用，缠绕卷制在带有孔的中心管上。传统的单级精细过滤滤芯使用的中心管其材质一般为注塑件，中心管为圆柱形，开设有贯通的纯水导流孔，其纯水导流孔一般为均分分布；此外，在轴向上，中心管一端封闭，作用为将收集的纯水与其它水隔开；另一端敞开，被设置为导流出收集的纯水。
实施例7，如图20，22所示，在一些实施方式中，所述支撑构件为中心管 5的结构，所述中心管5为具有中空空腔的圆柱形管，其管壁上设置有贯穿内外壁的导流孔，所述导流孔包括与所述第一滤芯1的位置相对的第一导流孔61和与所述第二滤芯2的位置相对的第二导流孔62，经过所述第一滤芯1过滤出的纯水能够经过所述第一导流孔61进入所述中心管5的内部，经过所述第二滤芯2过滤出的纯水能够经过所述第二导流孔62进入所述中心管5的内部。
这是本公开的实施例7的具体实施结构形式，本公开将支撑构件具体实施设置成中心管的结构(整体为注塑件)，能够在对第一和第二滤芯起到有效支撑的作用下，还能通过其上开设的第一导流孔有效地将第一滤芯过滤出的纯水导入中心管的内部空腔，并导出纯水，第二导流孔有效地将第二滤芯过滤出的纯水导入中心管的内部空腔并导出，而第一滤芯过滤出的杂质水(浓水)进入第二滤芯中进行过滤，能够有效提高对浓水的过滤效果，提高浓水回收率，从而提高纯水量，同时减小了体积，使得结构更为紧凑。
图22为基于图20所示注塑件一级两段中心管的滤芯水路结构示意图，仅具备同一根中心管一级两段净化提升纯水率功能。具体组成包括中心管、第一滤芯1、第二滤芯2，以及第一封水件71和第二封水件72。其中，原水从第一滤芯1靠近中心管尾端的端面进入，纯水经导流孔收集进中心管内，浓水则作为第二滤芯2的原水从靠近第一滤芯1浓水端进入，纯水经导流孔收集后与第一滤芯1的纯水汇合从纯水口排出，浓水则从端面排出。其中，第二封水件72的作用为将原水(外周都是原水)和第一滤芯1的浓水分隔开，第一封水件71的作用为将第二滤芯2的浓水和原水(外周都是原水)分隔开。
在一些实施方式中，所述中心管5沿其轴向依次包括第一轴段51、第二轴段52和第三轴段53，所述第一轴段51上开设所述第一导流孔61，所述第三轴段53上开设第二导流孔62，所述第二轴段52上不开设导流孔，所述第一滤芯1缠绕在所述第一轴段51的外周，所述第二滤芯2缠绕在所述第三轴段53的外周。本公开的中心管具体实施设置成沿轴向的第一、第二和第三轴段，第一轴段上开设第一导流孔，第一滤芯缠绕在第一轴段的外周，能够将第一滤芯过滤出的纯水通过第一导流孔导入中心管的内部空腔，第三轴段上开设第二导流孔，第二滤芯缠绕在第三轴段的外周，能够将第二滤芯过滤出的纯水通过第二导流孔导入中心管的内部空腔。同一根中心管上实现一级两段，需要在D1 和D3之间预留一个D2的距离(即第二轴段)，目的用于修膜时形成两部分滤芯，其中，D2的上端起始面为第一滤芯靠近第二滤芯的端面，终止面为第二滤芯靠近第一滤芯的端面。图20所述的一级两段中心管，可将传统多支滤芯串联的一级两段技术集成在同一支中心管上，实现高纯水率的同时并减少滤瓶数量的使用。但是其过滤功能仅为精细过滤滤芯的净化功能，为单级净化。
在一些实施方式中，所述中心管5为注塑件；所述第一滤芯1与所述第二滤芯2间隔布置，且在间隔的部位设置有第二封水件72，所述第二封水件72与所述第二轴段52相对；和/或，
所述第一轴段51的轴向长度为D1，所述第二轴段52的轴向长度为D2，所述第三轴段53的轴向长度为D3，并有D1：D2＝1～2.5。
本公开的实施例7的中心管为整体注塑件(具体实施为整体塑料一体注塑成型)，能够有效起到支撑滤芯内周的同时还能对纯水起到导流的作用；第二封水件被设置为将滤芯内部的浓水与外周的原水进行有效的隔开和分离，防止二者产生混合。本公开的技术方案中，以能实现一级两段功能的中心管为例进行说明。图20为可实现一级两段中心管的结构，相比于传统中心管，其纯水导流孔分两部分，具体为第一纯水导流孔(第一导流孔61)和第二纯水导流孔(第二导流孔62)第一导流孔61被设置为收集第一滤芯产生的纯水，其位置分布于D1区域内；第二导流孔62被设置为收集第二滤芯产生的纯水，其位置分布于D3区域内。为了实现一级两段，对D1区域和D2区域的长度比还有要求，其最优方案为D1：D2＝(1～2.5)：1之间，能够保证有效修膜的同时还能实现一级两段的过滤。
在一些实施方式中，所述中心管5布置为其中心轴线沿着竖直方向，所述第一滤芯1位于所述第二滤芯2的下方，所述第一轴段51、所述第二轴段52和所述第三轴段53从下至上依次连接，所述中心管5的下端为封闭端，原水通过所述第一滤芯1的下方进入所述第一滤芯1中。这是本公开的中心管的具体实施结构形式，沿中心轴线竖直方向布置的中心管，形成从下至上的第一、第二和第三轴段，第一滤芯和第二滤芯也从下至上排布，中心管下端封闭，以不允许原水进入中心管内部，原水进口为第一滤芯的上方，原水从下方进入第一滤芯中过滤，过滤出的纯水再通过第一导流孔进入中心管的内部。
在一些实施方式中，所述中心管5的上端为开口端，形成为纯水出口200，所述第二滤芯2的上端设置有第一封水件71，所述第一封水件71能够对水进行密封，且所述第一封水件71的上端设置所述浓水出口300。本公开的中心管下端为开口端能够有效形成纯水出口，以有效导出中心管中的纯水，本公开还通过第一封水件能够对第二滤芯的上端进行密封和分隔作用，并且第一封水件的上端与中心管之间形成浓水出口，以有效地将第二滤芯过滤出的杂质水导出。
实施例9，在一些实施方式中，所述中心管5还包括第四轴段54和第五轴段55，所述第五轴段55上还开设有第三导流孔63，所述级段式滤芯还包括第三滤芯，所述第一滤芯1缠绕在所述第一轴段51的外周，经过所述第二滤芯2过滤出的浓水能够到达所述第三滤芯处进行过滤，经过所述第三滤芯过滤出的纯水也能够进入所述中心管的内部并沿着所述中心管被排出，经过所述第三滤芯过滤出的浓水能够通过所述浓水出口300并被排出。这是本公开的实施例9的具体实施结构形式，如图24所示，即其在轴向方向上设置为五个轴段，并且开始有三部分的导流孔，能够实现一级多段的净化过滤效果，配合级段式滤芯需求开设纯水导流孔位置，还可实现一级多段净化功能。
实施例8，如图21，23，在一些实施方式中，所述支撑构件包括端盖组件9、第一后置滤芯10和第二后置滤芯11，所述第一后置滤芯10的内部具有第一中空空腔，所述第二后置滤芯11的内部具有第二中空空腔，所述第一后置滤芯10与所述第一滤芯1相对，所述第一滤芯1过滤出的纯水能够经过所述第一后置滤芯10进一步过滤后并进入所述第一中空空腔中，所述第二滤芯2过滤出的纯水能够经过所述第二后置滤芯11进一步过滤后并进入所述第二中空空腔中，所述第一中空空腔与所述第二中空空腔连通。本公开还通过将支撑构件包括端盖组件和两个后置滤芯的设置形式，在确保精细过滤滤芯发挥级段式过滤功能提升净水纯水率的同时，还可实现与后置口感滤芯一体化提升滤芯集成度、降低滤瓶使用数量，利于整机小体积设计功能；精细过滤滤芯和后置口感滤芯一体化，有利于整机小体积设计。
图23为基于图21所示注塑件一级两段中心管的滤芯水路结构示意图，其同时具备同一根中心管实现一级两段净化功能，提升纯水率，同时可与后置滤芯实现紧密贴合，实现一个滤芯组件上两级净化功能。其结构与图20所示滤 芯基本相同，差异点在中心管由注塑件和多微孔滤材结合而成，可实现一级两段净化提升纯水率，同时可实现精细过滤滤芯纯水原位净化，实现二合一滤芯结构。
在一些实施方式中，所述端盖组件9包括第一端盖91、第二端盖92和第三端盖93，所述第一端盖91连接设置在所述第一后置滤芯10上且与所述第二后置滤芯11相背的轴向一端，所述第二端盖92连接设置在所述第一后置滤芯10与所述第二后置滤芯11之间，所述第三端盖93连接设置在所述第二后置滤芯11上且与所述第一后置滤芯10相背的轴向一端。这是本公开的端盖组件的具体实施结构形式，即第一端盖被设置为对第一后置滤芯的一端进行支撑和固定，第二端盖被设置为对第一后置滤芯的另一端进行支撑和固定，第二端盖还能对第二后置滤芯的一端支撑固定，第三端盖对第二后置滤芯的另一端支撑固定。
图21所示的可实现一级两段功能的中心管，相比于图20，其组成由注塑件和过滤滤材共同组成，可实现精细过滤滤芯一级两段实现高纯水率目的，同时可与精细过滤滤芯的后置滤芯原位复合形成两级过滤功能的级段式滤芯。具体组成包括第一端盖91、第二端盖92和第三端盖93，以及第一后置滤芯10和第二后置滤芯11。
所述3个端盖的外外径和有效内径相同，目的为方便初始滤芯制作；所述第一端盖91一端封口，目的为实现水路分离；所述第二端盖92两端连通，目的为实现水路导通；所述第三端盖93同样为两端连通，目的为将收集的纯水排出，同时其靠近出水端外表面具有密封凹槽特征，作用为实现水路分离。
在一些实施方式中，所述第一滤芯1缠绕在所述第一后置滤芯10的外周，所述第二滤芯2缠绕在所述第二后置滤芯11的外周，所述第一滤芯1与所述第二滤芯2间隔布置，且在间隔的部位设置有第二封水件72，所述第二封水件72与所述第二端盖92相对。第一滤芯缠绕在第一后置滤芯的外周，能够将第一滤芯过滤出的纯水通过径向向内输送至第一后置滤芯中进行进一步过滤净化，第二滤芯缠绕在第二后置滤芯的外周，能够将第二滤芯过滤出的纯水通过径向向内输送至第二后置滤芯中进行进一步过滤净化；通过第二封水件能够对其内周的浓水与外周的原水之间进行分隔密封，防止二者混合。
在一些实施方式中，所述第一后置滤芯10位于所述第二后置滤芯11的下方，所述第一后置滤芯10与所述第二后置滤芯11的中心轴线重合并沿竖直方向延伸；
所述第一端盖91、所述第二端盖92和所述第三端盖93从下至上依次间隔排布；
所述第一端盖91的下端为封闭端，原水通过所述第一滤芯1的下方进入所述第一滤芯1中；
所述第三端盖93的上端为开口端，形成为纯水出口8，所述第二滤芯2的上端设置有第一封水件71，所述第一封水件71能够对水进行密封，且所述第一封水件71与所述第三端盖93之间形成所述浓水出口300。
这是本公开的实施例8的具体实施结构形式，即竖直方向布置的第一和第二后置滤芯，能够使得原水从下至上流入第一滤芯中过滤，再将第一滤芯中的浓水输送至第二滤芯中过滤，形成一级两段式的过滤结构，第三端盖下方形成的纯水开口能够有效将后置滤芯过滤后的纯水导出，浓水出口被设置为将第二滤芯过滤出的杂质水导出。
在一些实施方式中，所述第一端盖91、所述第二端盖92和所述第三端盖93均为注塑件；所述第一后置滤芯10和所述第二后置滤芯11均采用微孔滤材制成，所述微孔滤材的孔径为0.02～10pm。本公开的三个端盖均通过注塑件制成，能够有效起到支撑固定的作用，第一和第二后置滤芯采用微孔滤材制成能够对第一和第二滤芯过滤出的纯水进行进一步的精细过滤的作用，能够改善水的口感等，提高过滤精度。
在一些实施方式中，所述微孔滤材包括活性碳和陶瓷中的至少一种。相比于注塑件的可视孔，其可实现精细过滤滤芯的纯水与后置滤芯实现面式接触，净化效果更佳。所述第一后置滤芯10和第二后置滤芯11的长度比例，在1～2.5之间为较优方案。
在一些实施方式中，所述第一后置滤芯10的轴向一端与所述第一端盖91粘接，所述第一后置滤芯10的轴向另一端与所述第二端盖92粘接；所述第二后置滤芯11的轴向一端与所述第二端盖92粘接，所述第二后置滤芯11的轴向另一端与所述第三端盖93粘接；
所述第一后置滤芯10的外径小于等于所述第一端盖91的外径，所述第一后置滤芯10的外径也小于等于所述第二端盖92的外径；
所述第二后置滤芯11的外径小于等于所述第二端盖92的外径，所述第二后置滤芯11的外径也小于等于所述第三端盖93的外径。
本公开的第一后置滤芯与两个端盖之间具体实施通过粘接的方式固定，所述第一后置滤芯10为圆柱形，其外径≤第一端盖91和第二端盖92的外径，其内径与两个端盖的有效内径外壁相等，实现贴合，第一后置滤芯10和两个端盖的连接通过胶水粘接固定于相配合的端面上；
所述第二后置滤芯11为圆柱形，其外径≤第二端盖92和第三端盖93的外径，其内径与两个端盖的有效内径外壁相等，实现贴合，第二后置滤芯11和两个端盖的连接通过胶水粘接固定于相配合的端面上；
在一些实施方式中，还包括第三管路600、第四管路700和第五管路800、以及泵22和废水阀23，所述第三管路600的一端与所述预处理滤芯20的进口连通以通入原水，所述第四管路700的一端与所述浓水出口300连通以导出浓水或浓水，所述第五管路800的一端与所述后处理滤芯21的出口连通以导出纯水，所述第四管路700上设置所述废水阀23。
本公开提出的一种一级两段滤芯的净水系统，包含预处理滤芯、泵、一级两段式复合滤芯(即级段式滤芯900)、后处理滤芯和控制部件24等核心部件，其中预处理滤芯为碳、PP棉、超滤等前置过滤元件，原水经水口进入预处理滤芯进行第一步初过滤，滤除原水中的泥沙等大颗粒杂质。因纳滤、反渗透等在过滤时需要一定的渗透压，所以需要通过水泵对原水加压，加压后经过核心一级两段式复合滤芯，滤芯可为反渗透、纳滤等。在制水过程中，原水先经过第一级滤芯过滤，分别产生出纯水和废水，其中纯水部分经由纯水流道从纯水口流出，而废水部分则作为第二级滤芯的原水，流经第二级滤芯继续过滤，过滤后的纯水由纯水口流出，废水则流经废水电磁阀再排出。
本公开以级段式滤芯技术为实现高纯水率途径，通过提供一种优化设计的中心管，实现在同一支中心管上实现级段式滤芯技术，也即一支滤芯组件上实现级段式过滤功能达到提升净水纯水率目的，同时解决多支滤芯串联的级段式 滤芯技术带来的体积控制问题。此外，本技术方案提供的中心管，在确保精细过滤滤芯发挥级段式过滤功能提升净水纯水率的同时，还可实现与后置口感滤芯一体化提升滤芯集成度、降低滤瓶使用数量，利于整机小体积设计功能。
以上所述仅为本公开的较佳实施例而已，并不用以限制本公开，凡在本公开的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本公开的保护范围之内。以上所述仅是本公开的具体实施方式，应当指出，对于本技术领域的普通技术人员来说，在不脱离本公开技术原理的前提下，还可以做出若干改进和变型，这些改进和变型也应视为本公开的保护范围。

Claims (28)

  1. 一种级段式滤芯，包括：
    第一滤芯(1)、第二滤芯(2)和支撑构件，所述支撑构件能同时对所述第一滤芯(1)和所述第二滤芯(2)进行支撑，原水能够经过所述第一滤芯(1)过滤，经过所述第一滤芯(1)过滤出的纯水能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第一滤芯(1)过滤出的浓水能够到达所述第二滤芯(2)处进行过滤，经过所述第二滤芯(2)过滤出的纯水也能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第二滤芯(2)过滤出的浓水能够通过浓水出口(4)并被排出。
  2. 根据权利要求1所述的级段式滤芯，其中：
    所述支撑构件为中心管(5)的结构，所述中心管(5)为具有中空空腔的圆柱形管，其管壁上设置有贯穿内外壁的导流孔，所述导流孔包括与所述第一滤芯(1)的位置相对的第一导流孔(61)和与所述第二滤芯(2)的位置相对的第二导流孔(62)，经过所述第一滤芯(1)过滤出的纯水能够经过所述第一导流孔(61)进入所述中心管(5)的内部，经过所述第二滤芯(2)过滤出的纯水能够经过所述第二导流孔(62)进入所述中心管(5)的内部。
  3. 根据权利要求2所述的级段式滤芯，其中：
    所述中心管(5)沿其轴向依次包括第一轴段(51)、第二轴段(52)和第三轴段(53)，所述第一轴段(51)上开设所述第一导流孔(61)，所述第三轴段(53)上开设第二导流孔(62)，所述第二轴段(52)上不开设导流孔，所述第一滤芯(1)缠绕在所述第一轴段(51)的外周，所述第二滤芯(2)缠绕在所述第三轴段(53)的外周。
  4. 根据权利要求3所述的级段式滤芯，其中：
    所述中心管(5)为注塑件；所述第一滤芯(1)与所述第二滤芯(2)间隔布置，且在间隔的部位设置有第一封水件(71)，所述第一封水件(71)与所述第二轴段(52)相对；
    所述第一轴段(51)的轴向长度为D1，所述第二轴段(52)的轴向长度为D2，所述第三轴段(53)的轴向长度为D3，并有D1：D2＝1～2.5。
  5. 根据权利要求3所述的级段式滤芯，其中：
    所述中心管(5)布置为其中心轴线沿着竖直方向，所述第一滤芯(1)位于所述第二滤芯(2)的上方，所述第一轴段(51)、所述第二轴段(52)和所述第三轴段(53)从上至下依次连接，所述中心管(5)的上端为封闭端，原水通过所述第一滤芯(1)的上方进入所述第一滤芯(1)中。
  6. 根据权利要求5所述的级段式滤芯，其中：
    所述中心管(5)的下端为开口端，形成为纯水出口(8)，所述第二滤芯(2)的下端设置有第二封水件(72)，所述第二封水件(72)能够对水进行密封，且所述第二封水件(72)的下端设置所述浓水出口(4)。
  7. 根据权利要求3-6中任一项所述的级段式滤芯，其中：
    所述中心管(5)还包括第四轴段(54)和第五轴段(55)，所述第五轴段(55)上还开设有第三导流孔(63)，所述级段式滤芯还包括第三滤芯，所述第一滤芯(1)缠绕在所述第一轴段(51)的外周，经过所述第二滤芯(2)过滤出的浓水能够到达所述第三滤芯处进行过滤，经过所述第三滤芯过滤出的纯水也能够进入所述中心管的内部并沿着所述中心管被排出，经过所述第三滤芯过滤出的浓水能够通过所述浓水出口(4)并被排出。
  8. 根据权利要求1-6中任一项所述的级段式滤芯，其中：
    所述支撑构件包括端盖组件(9)、第一后置滤芯(10)和第二后置滤芯(11)，所述第一后置滤芯(10)的内部具有第一中空空腔，所述第二后置滤芯(11)的内部具有第二中空空腔，所述第一后置滤芯(10)与所述第一滤芯(1)相对，所述第一滤芯(1)过滤出的纯水能够经过所述第一后置滤芯(10)进一步过滤后并进入所述第一中空空腔中，所述第二滤芯(2)过滤出的纯水能够经过所述第二后置滤芯(11)进一步过滤后并进入所述第二中空空腔中，所述第一中空空腔与所述第二中空空腔连通。
  9. 根据权利要求8所述的级段式滤芯，其中：
    所述端盖组件(9)包括第一端盖(91)、第二端盖(92)和第三端盖(93)，所述第一端盖(91)连接设置在所述第一后置滤芯(10)上且与所述第二后置滤芯(11)相背的轴向一端，所述第二端盖(92)连接设置在所述第一后置滤芯(10)与所述第二后置滤芯(11)之间，所述第三端盖(93)连接设置在所述第二后置滤芯(11)上且与所述第一后置滤芯(10)相背的轴向一端。
  10. 根据权利要求9所述的级段式滤芯，其中：
    所述第一滤芯(1)缠绕在所述第一后置滤芯(10)的外周，所述第二滤芯(2)缠绕在所述第二后置滤芯(11)的外周，所述第一滤芯(1)与所述第二滤芯(2)间隔布置，且在间隔的部位设置有第一封水件(71)，所述第一封水件(71)与所述第二端盖(92)相对。
  11. 根据权利要求9所述的级段式滤芯，其中：
    所述第一后置滤芯(10)位于所述第二后置滤芯(11)的上方，所述第一后置滤芯(10)与所述第二后置滤芯(11)的中心轴线重合并沿竖直方向延伸；
    所述第一端盖(91)、所述第二端盖(92)和所述第三端盖(93)从上至下依次间隔排布；
    所述第一端盖(91)的上端为封闭端，原水通过所述第一滤芯(1)的上方进入所述第一滤芯(1)中；
    所述第三端盖(93)的下端为开口端，形成为纯水出口(8)，所述第二滤芯(2)的下端设置有第二封水件(72)，所述第二封水件(72)能够对水进行密封，且所述第二封水件(72)与所述第三端盖(93)之间形成所述浓水出口(4)。
  12. 根据权利要求9所述的级段式滤芯，其中：
    所述第一端盖(91)、所述第二端盖(92)和所述第三端盖(93)均为注塑件；所述第一后置滤芯(10)和所述第二后置滤芯(11)均采用微孔滤材制成，所述微孔滤材的孔径为0.02～15μm。
  13. 根据权利要求12所述的级段式滤芯，其中：
    所述微孔滤材包括活性碳和陶瓷中的至少一种。
  14. 根据权利要求9所述的级段式滤芯，其中：
    所述第一后置滤芯(10)的轴向一端与所述第一端盖(91)粘接，所述第一后置滤芯(10)的轴向另一端与所述第二端盖(92)粘接；所述第二后置滤芯(11)的轴向一端与所述第二端盖(92)粘接，所述第二后置滤芯(11)的轴向另一端与所述第三端盖(93)粘接；
    所述第一后置滤芯(10)的外径小于等于所述第一端盖(91)的外径，所述第一后置滤芯(10)的外径也小于等于所述第二端盖(92)的外径；
    所述第二后置滤芯(11)的外径小于等于所述第二端盖(92)的外径，所述第二后置滤芯(11)的外径也小于等于所述第三端盖(93)的外径。
  15. 一种级段式滤芯组件，包括权利要求1-14中任一项所述的级段式滤芯，其中：还包括：
    滤瓶体(12)和滤瓶盖(13)，所述滤瓶体(12)和所述滤瓶盖(13)共同围成内部空腔，所述第一滤芯(1)、所述第二滤芯(2)和所述支撑构件均设置于所述内部空腔中。
  16. 根据权利要求15所述的级段式滤芯组件，其中：
    所述滤瓶盖(13)盖设于所述滤瓶体(12)的上端：
    所述滤瓶体(12)的下端设置有原水进口(3)，所述支撑构件的下端形成纯水出口(8)，所述滤瓶体(12)的下端与所述支撑构件之间设置浓水出口(4)；或者，所述滤瓶盖(13)上设置有原水进口(3)，所述支撑构件的下端形成纯水出口(8)，所述滤瓶体(12)的下端与所述支撑构件之间设置浓水出口(4)。
  17. 根据权利要求16所述的级段式滤芯组件，其中：
    所述第一滤芯(1)的上端与所述滤瓶盖(13)之间形成能供水流通的第一间隙流道(101)，所述第一滤芯(1)的外周与所述滤瓶体(12)之间形成能供水流通的第二间隙流道(102)，所述第二滤芯(2)的外周与所述滤瓶体(12)之间形成能供水流通的第三间隙流道(103)，所述第二滤芯(2)的下端与所述滤瓶体(12)之间形成能供水流通的第四间隙流道(104)。
  18. 根据权利要求16所述的级段式滤芯组件，其中：
    当所述滤瓶体(12)的下端设置有原水进口(3)时，所述第二滤芯(2)的下端还设置有第一封水件(71)，所述第一封水件(71)能对所述第二滤芯(2)的下端的部分结构进行密封，所述第一封水件(71)上设置有开口，以形成第一出口(71a)，能允许所述第二滤芯(2)过滤出的浓水通过所述第一封水件(71)向下流至所述浓水出口(4)并排出；所述第一滤芯(1)与所述第二滤芯(2)的轴向之间的外周位置设置有第二封水件(72)，以对第二封水件(72)外周的原水与第二封水件(72)内周的浓水进行密封；
    当所述滤瓶盖(13)上设置原水进口(3)时，所述第二滤芯(2)的下端还设置有第一封水件(71)，所述第一封水件(71)能对所述第二滤芯(2)的下端的部分结构进行密封，所述第一封水件(71)上设置有开口，以形成第一出口(71a)，能允许所述第二滤芯(2)过滤出的浓水通过所述第一出口(71a) 向下流至所述浓水出口(4)并排出；所述第一滤芯(1)的外周与所述滤瓶体(12)之间还设置有第二封水件(72)，以对第二封水件(72)上方的原水进行密封。
  19. 一种净水装置，包括权利要求1-14中任一项所述的级段式滤芯或权利要求15-18中任一项所述的级段式滤芯组件。
  20. 一种包含级段式滤芯的净水系统，包括：
    级段式滤芯(900)、预处理滤芯(20)和后处理滤芯(21)，所述级段式滤芯(900)包括第一滤芯(1)、第二滤芯(2)和支撑构件，所述级段式滤芯(900)还包括原水进口(100)、纯水出口(200)、浓水出口(300)，所述预处理滤芯(20)的出水能与所述原水进口(100)连通，所述后处理滤芯(21)的进水口能与所述纯水出口(200)连通；
    所述支撑构件能同时对所述第一滤芯(1)和所述第二滤芯(2)进行支撑，
    原水能够经过所述第一滤芯(1)过滤，经过所述第一滤芯(1)过滤出的纯水能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第一滤芯(1)过滤出的浓水能够到达所述第二滤芯(2)处进行过滤，经过所述第二滤芯(2)过滤出的纯水能够进入所述支撑构件的内部并沿着所述支撑构件被排出，经过所述第二滤芯(2)过滤出的浓水能够通过浓水出口(300)并被排出；
    所述预处理滤芯(20)的出水能通过第一管路(400)与所述原水进口(100)连通，所述后处理滤芯(21)的进水口能通过第二管路(500)与所述纯水出口(200)连通。
  21. 根据权利要求20所述的包含级段式滤芯的净水系统，其中：
    还包括滤芯外壳(3b)，所述原水进口(100)、所述纯水出口(200)和所述浓水出口(300)均设置在所述滤芯外壳(3b)的轴向第一端；或者，所述原水进口(100)设置在所述滤芯外壳(3b)的轴向第一端，所述纯水出口(200)和所述浓水出口(300)均设置在所述滤芯外壳(3b)的轴向第二端。
  22. 根据权利要求21所述的包含级段式滤芯的净水系统，其中：
    所述第一滤芯(1)、所述第二滤芯(2)和所述支撑构件均设置于同一所述滤芯外壳(3b)中；
    所述第二滤芯(2)位于所述第一滤芯(1)的轴向一端，所述第二滤芯(2) 相对于所述第一滤芯(1)而靠近所述原水进口(100)设置，所述支撑构件同时位于所述第一滤芯(1)和所述第二滤芯(2)的径向内侧。
  23. 根据权利要求21所述的包含级段式滤芯的净水系统，其中：
    所述原水进口(100)、所述纯水出口(200)和所述浓水出口(300)均设置在所述滤芯外壳(3b)的上端；
    所述第一滤芯(1)位于所述第二滤芯(2)的下方，所述第一滤芯(1)的下端与所述滤芯外壳(3b)之间形成能供水流通的第一间隙流道(101)，所述第一滤芯(1)的外周与所述滤芯外壳(3b)之间形成能供水流通的第二间隙流道(102)，所述第二滤芯(2)的外周与所述滤芯外壳(3b)之间形成能供水流通的第三间隙流道(103)，所述第二滤芯(2)的上端与所述滤芯外壳(3b)之间形成能供水流通的第四间隙流道(104)。
  24. 根据权利要求23所述的包含级段式滤芯的净水系统，其中：
    所述第二滤芯(2)的上端还设置有第一封水件(71)，所述第一封水件(71)能对所述第二滤芯(2)的上端的部分结构进行密封；所述第一滤芯(1)与所述第二滤芯(2)的轴向之间的外周位置设置有第二封水件(72)，以对第二封水件(72)外周的原水与第二封水件(72)内周的浓水进行密封。
  25. 根据权利要求24所述的包含级段式滤芯的净水系统，其中：
    所述第一滤芯(1)的下端设置有第三封水件(73’)，所述第三封水件(73’)能对所述第一滤芯(1)的下端的部分结构进行密封，所述第三封水件(73’)上设置有开口，以形成第一入口(73a)，能允许所述第一滤芯(1)下方的水通过所述第一入口(73a)向上流入所述第一滤芯(1)。
  26. 根据权利要求25所述的包含级段式滤芯的净水系统，其中：
    所述第一滤芯(1)的上端与所述第二滤芯(2)的下端之间还设置有第四封水件(74’)，所述第四封水件(74’)能对所述第一滤芯(1)的上端的部分结构进行密封，所述第四封水件(74’)上设置有开口，以形成第二入口(74a)，能允许所述第一滤芯(1)过滤出的浓水通过所述第二入口(74a)向上流入所述第二滤芯(2)；所述第一封水件(71)上设置有开口，以形成第三出口(71b)，能允许所述第二滤芯(2)过滤出的浓水通过所述第三出口(71b)向上流至所述浓水出口(300)并排出。
  27. 根据权利要求26所述的包含级段式滤芯的净水系统，其中：
    其中所述第一入口(73a)相对于所述第二入口(74a)靠近径向内侧设置，所述第三出口(71b)相对于所述第二入口(74a)靠近径向内侧设置；或者所述第一入口(73a)相对于所述第二入口(74a)靠近径向外侧设置，所述第三出口(71b)相对于所述第二入口(74a)靠近径向外侧设置。
  28. 根据权利要求20所述的包含级段式滤芯的净水系统，其中：
    还包括第三管路(600)、第四管路(700)和第五管路(800)、以及泵(22)和废水阀(23)，所述第三管路(600)的一端与所述预处理滤芯(20)的进口连通以通入原水，所述第四管路(700)的一端与所述浓水出口(300)连通以导出浓水或浓水，所述第五管路(800)的一端与所述后处理滤芯(21)的出口连通以导出纯水，所述第四管路(700)上设置所述废水阀(23)。
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