WO2020088572A1 - 复合滤芯和具有其的水处理装置 - Google Patents

复合滤芯和具有其的水处理装置 Download PDF

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Publication number
WO2020088572A1
WO2020088572A1 PCT/CN2019/114625 CN2019114625W WO2020088572A1 WO 2020088572 A1 WO2020088572 A1 WO 2020088572A1 CN 2019114625 W CN2019114625 W CN 2019114625W WO 2020088572 A1 WO2020088572 A1 WO 2020088572A1
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WO
WIPO (PCT)
Prior art keywords
pac
water
filter
inner tube
filter element
Prior art date
Application number
PCT/CN2019/114625
Other languages
English (en)
French (fr)
Inventor
李杨敏
Original Assignee
佛山市顺德区美的饮水机制造有限公司
美的集团股份有限公司
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.)
Filing date
Publication date
Priority claimed from CN201811289499.7A external-priority patent/CN111115871B/zh
Priority claimed from CN201821791222.XU external-priority patent/CN209307052U/zh
Priority claimed from CN201811291322.0A external-priority patent/CN111115880B/zh
Priority claimed from CN201821790310.8U external-priority patent/CN209307050U/zh
Priority claimed from CN201821792306.5U external-priority patent/CN209352649U/zh
Application filed by 佛山市顺德区美的饮水机制造有限公司, 美的集团股份有限公司 filed Critical 佛山市顺德区美的饮水机制造有限公司
Priority to US17/288,920 priority Critical patent/US11851351B2/en
Publication of WO2020088572A1 publication Critical patent/WO2020088572A1/zh

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/025—Reverse osmosis; Hyperfiltration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
    • B01D61/08—Apparatus therefor
    • B01D61/081—Apparatus therefor used at home, e.g. kitchen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
    • B01D61/14—Ultrafiltration; Microfiltration
    • B01D61/18—Apparatus therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D63/00—Apparatus in general for separation processes using semi-permeable membranes
    • B01D63/06—Tubular membrane modules
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2311/00—Details relating to membrane separation process operations and control
    • B01D2311/26—Further operations combined with membrane separation processes
    • B01D2311/2649—Filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2313/00—Details relating to membrane modules or apparatus
    • B01D2313/44—Cartridge types
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2319/00—Membrane assemblies within one housing
    • B01D2319/02—Elements in series
    • B01D2319/025—Permeate series
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/003—Coaxial constructions, e.g. a cartridge located coaxially within another
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00—Apparatus for treatment of water, waste water or sewage
    • C02F2201/002—Construction details of the apparatus
    • C02F2201/004—Seals, connections

Definitions

  • the present application belongs to the technical field of household appliances, and in particular, relates to a composite filter element and a water treatment device having the same.
  • water treatment devices such as net drinking machines include multiple grading filter elements, which occupy a large space and have a small flux, not only occupying a large indoor space, but also bringing a large Inconvenient, and can not meet users' water needs.
  • This application aims to solve at least one of the technical problems in the prior art.
  • the present application proposes a composite filter element, which has a small volume and saves space.
  • the present application also proposes a water treatment device having the above composite filter element.
  • a composite filter element includes: a housing; a first filter group, the first filter group is provided in the housing, and a filter material installation cavity is defined in the first filter group; An inner tube, the inner tube is provided in the filter material installation cavity; a second filter group, the second filter group is provided in the inner tube.
  • the second filter group is set in the inner tube
  • the inner tube is set in the first filter group, that is to say, the first filter group, the inner tube and the second filter group are nested in sequence .
  • the inner tube is detachably provided in the filter material installation cavity.
  • the first filter group is an RO filter element
  • the second filter group is a PAC filter element
  • the wall thickness of the PAC filter element is greater than 10 mm.
  • the housing is provided with a first water inlet, a first water outlet, a second water inlet and a second water outlet; the outer wall of the first filter group and the inner wall of the housing A first water purifying cavity communicating with the second water inlet is defined; an inner wall of the first filter group and an outer wall of the inner tube define a pure water cavity communicating with the second water outlet; The inner wall and the outer wall of the second filter group define a tap water chamber that communicates with the first water inlet; the second filter group defines a second water purification chamber that communicates with the first water outlet.
  • the first filtration group includes: a central tube, the filter material installation cavity is provided in the central tube, a pure water through hole is formed on the wall of the central tube; an RO filter membrane, The RO filter membrane is sleeved on the center tube; an annular inner cover is sleeved on the center tube, and the inner peripheral edge of the annular inner cover is connected to the upper end edge of the inner tube , And the lower end surface of the ring-shaped inner cover comes into contact with the upper end surface of the RO filter membrane.
  • the annular inner cover defines a downwardly opened waste water tank, and the upper end surface of the RO filter membrane cooperates with the annular inner cover to close the waste water tank to form a waste water chamber, the inner The top of the cover is provided with a waste water port communicating with the waste water cavity.
  • a third water outlet that communicates with the waste water outlet is provided on the top of the housing.
  • the second filter group includes: a PAC skeleton, the PAC skeleton is located in the inner tube and extends along the axial direction of the inner tube, and the second water purification chamber is provided in the PAC framework; PAC filter membrane, the PAC filter membrane is sleeved on the PAC framework and extends along the axial direction of the PAC framework, the tap water chamber is defined in the outer wall of the PAC filter membrane and the inner Between the inner peripheral walls of the tube.
  • the PAC skeleton is tubular, the inner cavity of the PAC skeleton communicates with the first water outlet, and a wall of the PAC skeleton is formed with a water purification through hole.
  • the second filter group further includes: a PAC upper end cover, the PAC upper end cover is sleeved on the upper portion of the PAC skeleton, and a lower surface of the PAC upper end cover is sealed against the upper end surface of the PAC filter membrane ,
  • the upper end cover of the PAC defines a first water hole communicating the tap water cavity and the first water inlet and a second water hole communicating the second water purifying cavity and the first water outlet;
  • a PAC lower end cover, the PAC lower end cover is sleeved on the lower part of the PAC skeleton, and the upper surface of the PAC lower end cover is sealingly abutted against the lower end surface of the PAC filter membrane.
  • the outer edge of the upper end cap of the PAC is formed with an upwardly turned down flange, and the inner wall of the upper turned edge stops against the outer peripheral wall of the PAC filter membrane; the lower end cap of the PAC The outer peripheral edge of the is formed with a downwardly turned down flange, and the inner wall of the downward turned flange stops against the peripheral wall of the PAC filter membrane.
  • the composite filter element further includes: a third filter group disposed in the pure water chamber, and the third filter group divides the pure water chamber into the The original pure water chamber outside the third filtration group and the water outlet chamber located in the third filtration group, the water outlet chamber communicates with the second water outlet.
  • the third filter group and the inner tube are arranged along the axial direction of the first filter group.
  • the composite filter element further includes: a water outlet pipe, the water outlet pipe penetrates the inner pipe in the axial direction of the inner pipe, one end of the water outlet pipe communicates with the water outlet chamber, and the water outlet pipe The other end of is connected to the second water outlet.
  • the housing includes: a cylinder, the bottom of the cylinder is open, the first filter group is disposed in the cylinder, the first water inlet, the first outlet The water inlet, the second water inlet and the second water outlet are all provided on the top of the cylinder; a lower cover is connected to the cylinder to close the open opening of the cylinder, and The upper surface of the lower cover is in sealing contact with the lower end surface of the first filter group.
  • the central axis of the first filtration group, the central axis of the second filtration group, and the central axis of the inner tube coincide with the central axis of the housing.
  • one end of the inner tube is open, the outer edge of the open end of the inner tube is in sealing contact with the inner peripheral wall of the filter material installation cavity, and the water pressure inside the inner tube is greater than the Water pressure outside the inner tube.
  • the top of the inner tube is open, and the inner diameter of the upper portion of the filter material installation cavity remains unchanged or gradually decreases from top to bottom.
  • the length of the inner tube in the filter material installation cavity in the axial direction is greater than the length of the inner tube.
  • the outer diameter of the upper end edge of the inner tube is equal to the inner diameter of the upper end edge of the filter material installation cavity.
  • a sealing ring is provided between the outer peripheral wall of the inner tube and the inner wall of the central tube.
  • a sealing ring mounting groove is formed on an upper portion of the outer peripheral wall of the inner tube, and the sealing ring mounting groove extends along the circumferential direction of the inner tube.
  • a support platform extending in the axial direction of the third filter group is provided in the filter material installation cavity, and the support platform abuts on the lower end of the inner tube and the filter material Between the bottom walls of the installation cavity.
  • the composite filter element further includes: a water outlet pipe, one end of the water outlet pipe communicates with the second water outlet, and the other end of the water outlet pipe penetrates the inner pipe along the axial direction of the inner pipe Afterwards, extend the inner tube and into the filter material installation cavity, wherein the outer wall of the outlet pipe is provided with a PAC lower end cover, and the second filter group is glued on the PAC lower end cover A rubber stop ring, the rubber stop ring is sheathed on the water outlet pipe, and the outer periphery of the rubber stop ring is blocked on the circumferential outer side of the lower end cover of the PAC.
  • the second filter group is disposed around the water outlet pipe
  • the lower end cover of the PAC is formed as an annular plate and is connected to an end surface of the second filter group
  • the rubber retaining ring includes: A connecting ring and a sealing ring, the sealing ring becomes cylindrical and sleeved on the outside of the second filter group and the lower end cap of the PAC, the connecting ring is away from the end of the sealing ring away from the second filter group
  • the rim extends radially inward.
  • a locking protrusion is provided on the lower end cover of the PAC, and a locking hole matched with the locking protrusion is provided on the rubber retaining ring.
  • the water outlet pipe is an integral injection molded part
  • the PAC lower end cover is integrally injection molded on the water outlet pipe.
  • the water treatment device includes the composite filter element according to the above embodiment.
  • the structure is compact, which is advantageous for reducing the overall volume.
  • FIG. 1 is a schematic structural view of a composite filter element according to an embodiment of the present application.
  • FIG. 2 is a schematic diagram of a structure of a composite filter element located in a housing according to an embodiment of the present application
  • FIG. 3 is a cross-sectional view taken along line A-A in FIG. 1;
  • FIG. 4 is a cross-sectional view taken along line B-B in FIG. 2;
  • Figure 5 is an exploded view of the mechanism in Figure 4.
  • FIG. 6 is an exploded view of the housing of the composite filter element according to an embodiment of the present application.
  • FIG. 7 is a schematic diagram of cooperation between an inner tube and a third filter group according to an embodiment of the present application.
  • FIG. 8 is a cross-sectional view taken along line C-C in FIG. 7;
  • FIG. 9 is a schematic structural diagram of an annular inner cover according to an embodiment of the present application.
  • FIG. 10 is a cross-sectional view of an annular inner cover according to an embodiment of the present application.
  • FIG. 11 is a plan view of an annular inner cover according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a central tube according to an embodiment of the present application.
  • FIG. 13 is a cross-sectional view of the center tube according to an embodiment of the present application.
  • FIG. 14 is a side view of the center tube according to an embodiment of the present application.
  • 16 is a schematic diagram of the cooperation relationship between the first fixing structure and the first plug-in structure of the composite filter element assembly in some embodiments of the present application;
  • FIG. 17 is a partially enlarged schematic diagram of the first fixing structure and the first plug-in structure in a first position when they cooperate in some embodiments of the present application;
  • FIG. 18 is a schematic diagram of the cooperation relationship between the first fixing structure and the first plug-in structure of the composite filter element assembly in some embodiments of the present application;
  • FIG. 19 is a partially enlarged schematic diagram of the first fixing structure and the first plug-in structure in a second position when they cooperate in some embodiments of the present application;
  • 20 is a three-dimensional structural schematic diagram of a handle with a first plug-in structure according to some embodiments of the present application.
  • 21 is a schematic diagram of the cooperation relationship between the second fixing structure and the second plug-in structure of the composite filter element assembly in some embodiments of the present application;
  • 22 is a partial structural schematic diagram of the second fixing structure and the second plug-in structure cooperating in the first position in some embodiments of the present application;
  • 23 is a schematic diagram of the cooperation relationship between the second fixing structure and the second plug-in structure of the composite filter element assembly in some embodiments of the present application;
  • 24 is a schematic structural diagram of a second fixing structure and a second plug-in structure in a second position when they cooperate in some embodiments of the present application;
  • 25 is a plan view of a second fixing structure and a second plug-in structure of a composite filter element assembly according to some embodiments of this application;
  • 26 is a three-dimensional structural schematic diagram of a handle with a second plug structure according to some embodiments of the present application.
  • Figure 27 is a partially enlarged view of Figure 3;
  • FIG. 28 is a partially enlarged schematic view of the water outlet pipe and the rubber retaining ring in some embodiments.
  • 20 first filter group; 21: center tube; 210: filter material installation cavity; 211: surrounding board; 2111: pure water through hole; 2112: water guide trough; 212: lower cover plate; 213: support table; 22: RO Filter membrane; 23: annular inner cover; 231: waste water chamber; 232: waste water port;
  • 40 second filter group; 41: PAC skeleton; 42: PAC filter membrane; 43: PAC upper end cap; 431: upper cuff; 44: PAC lower end cap; 440: card convex; 441: lower cuff; 442: block Glue ring; 443: raised;
  • 50 third filtration group; 51: first water purification chamber; 52: pure water chamber; 521: outlet water chamber; 522: original pure water chamber; 53: tap water chamber; 54: second water purification chamber;
  • connection should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components.
  • installation should be understood in a broad sense, for example, it can be fixed connection or detachable Connected, or connected integrally; either mechanically or electrically; directly connected, or indirectly connected through an intermediary, or internally connected between two components.
  • the composite filter element 100 and the water treatment device having the same according to an embodiment of the present application will be described below with reference to FIGS. 1-28.
  • the composite filter element 100 includes: a housing 10, a first filter group 20, an inner tube 30 and a second filter group 40.
  • the first filter group 20 is provided in the housing 10, and a filter material installation cavity 210 is defined in the first filter group 20.
  • the inner tube 30 is provided in the filter material installation cavity 210, the second filter group 40 is provided in the inner tube 30.
  • the inner tube 30 is formed into a tubular shape with one end open and the other end closed.
  • the inner tube 30 can divide the filter material installation cavity 210 into an inner cavity and an outer cavity.
  • the second filter group 40 is provided in the inner cavity.
  • One side of 210 is open, the water flow can not only pass through the first filter group 20 to pass through the filtration of the first filter group 20, but also enter the inner cavity through the open opening of the filter material installation cavity 210 and pass through the filtration of the second filter group 40 effect.
  • the second filter group 40 is provided in the inner tube 30, and the inner tube 30 is provided in the first filter group 20, that is, the first filter group 20,
  • the inner tube 30 and the second filter group 40 are nested in sequence, so that the space in the first filter group 20 can be fully utilized, and the first filter group 20 and the second filter group 40 are separated and combined in the housing 10 by using the inner tube 30
  • the space that originally contained one filter element can accommodate two filter tubes, saving the space occupied by the first filter group 20 and the second filter group 40.
  • the inner tube 30 is detachably provided in the filter material installation cavity 210, and the detachably provided inner tube 30 is simple to assemble, which provides convenience for the assembly of the first filter group 20.
  • the inner tube 30 is open.
  • the inner tube 30 is disposed in the housing 10 and separates the inner cavity of the housing 10 into an inner cavity and an outer cavity.
  • the first filter group 20 is located in the outer cavity and the second filter group 40 is located in the inner cavity.
  • the inner tube 30 is formed into a cylindrical shape with one end open, the closed end of the cylindrical inner tube 30 extends into the housing 10, and the open opening of the inner tube 30 is hermetically connected to the inner wall of the housing 10.
  • the water pressure inside the inner tube 30 is greater than the water pressure outside the inner tube 30
  • the pressure inside the inner tube 30 is greater than the pressure between the inner tube 30 and the housing 10, under the action of the high pressure inside the inner tube 30
  • the force direction of the inner tube 30 is toward the inside of the housing 10, that is, the pressure will only press the inner tube 30 toward the inside of the housing 10, which can prevent the inner tube 30 from detaching from the housing 10.
  • the first filter group 20 and the second filter group 40 are separated and compounded in the housing 10 by the inner tube 30, which not only saves the first filter group 20 and the second filter
  • the occupied space of the group 40 can also improve the filtering effect of the composite filter element 100.
  • the inner water pressure of the inner tube 30 is greater than the outer water pressure.
  • the top of the filter material installation cavity 210 is open, the top of the inner tube 30 is open, the inner tube 30 is installed in the first filter group 20 from the top of the filter material installation cavity 210, the outer peripheral wall of the inner tube 30 and the filter material installation cavity 210 The perimeter wall abuts.
  • the inner diameter of the upper part of the filter material installation cavity 210 remains unchanged or gradually decreases from top to bottom, and the internal water pressure of the inner tube 30 exerts a downward force on the inner tube 30 to prevent the inner tube 30 Detach from the filter material installation cavity 210, and the inner diameter of the upper part of the filter material installation cavity 210 gradually decreases from top to bottom.
  • the inner tube 30 moves downward, the outer peripheral wall of the inner tube 30 and the first filter group The sealing effect between the inner peripheral walls of 20 will gradually increase, and the tightness of the composite filter element 100 will also increase.
  • the length of the filter material installation cavity 210 in the axial direction of the inner tube 30 is greater than the length of the inner tube 30, that is, when the upper edge of the inner tube 30 abuts on the filter material installation cavity 210 There is still a certain distance between the bottom of the inner tube 30 and the bottom of the filter material installation cavity 210 when the upper edge of the inner tube 30 is provided, which can provide a moving space for the water pressure to squeeze the inner tube 30 downward, preventing the lower end of the inner tube 30 The inability to move downwards results in a tight seal between the upper edge of the inner tube 30 and the upper edge of the filter material installation cavity 210.
  • the space at the lower end of the inner tube 30 can be used to accommodate the purified water of the first filter group 20, which improves the performance of the composite filter element 100.
  • the outer diameter of the upper end edge of the inner tube 30 is equal to the inner diameter of the upper end edge of the filter material installation cavity 210.
  • a sealing ring 301 is provided between the outer peripheral wall of the inner tube 30 and the inner wall of the central tube 21, and the sealing ring 301 is sleeved on the inner tube 30 and passes through the inner tube
  • a sealing ring 301 is provided between the 30 and the center tube 21, which can improve the airtightness between the inner tube 30 and the center tube 21 and prevent the leakage of high-pressure water flow.
  • a sealing ring mounting groove is formed on the upper portion of the outer peripheral wall of the inner tube 30, and the sealing ring mounting groove is recessed inward along the radial direction of the inner tube 30 and extends along the circumferential direction of the inner tube 30, and the sealing ring 301 accommodates the radial direction
  • the inside is accommodated in the seal ring installation groove, and the width of the seal ring 301 is greater than the depth of the seal ring installation groove, that is, the radius of the outer ring of the seal ring 301 minus the radius of the inner ring is greater than the depth of the seal ring installation groove.
  • the outer circumferential edge of the seal ring 301 protrudes from the outer circumferential wall of the inner tube 30, the outer circumferential edge of the seal ring 301 cooperates with the inner circumferential wall of the center tube 21, and the upper edge of the inner tube 30 is sealed with The gap between the upper edges of the central tube 21.
  • the sealing ring mounting groove By providing the sealing ring mounting groove, not only can the sealing performance of the sealing ring 301 be improved, but also the stability of the sealing ring 301 on the inner tube 30 can be improved, preventing the sealing ring 301 from being axially along the inner tube 30 under the effect of water pressure slide.
  • the outer diameter of the sealing ring 301 is larger than the opening diameter of the filter material installation cavity 210, and the assembly of the sealing ring 301 can be facilitated by providing the sealing ring mounting groove.
  • the first filter group 20 is an RO filter element (ie, reverse osmosis membrane filter element), and the second filter group 40 is a PAC filter element.
  • the wall thickness of the PAC filter element is greater than 10 mm.
  • a first water inlet 111, a first water outlet 112, a second water inlet 113, and a second water outlet 114 are provided on the housing 10, wherein A water inlet 111 and a first water outlet 112 communicate with the filter material installation cavity 210.
  • the outer wall of the first filter group 20 and the inner wall of the housing 10 define a first water purification chamber 51 communicating with the second water inlet 113, and the inner wall of the first filter group 20 and the outer wall of the inner tube 30 define a second water outlet 114
  • the pure water chamber 52, the inner wall of the inner tube 30 and the outer wall of the second filter group 40 define a tap water chamber 53 that communicates with the first water inlet 111, and the second filter group 40 defines a second net that communicates with the first water outlet 112 ⁇ ⁇ 54.
  • the water flow enters the tap water chamber 53 through the first water inlet 111, and the water flow in the tap water chamber 53 enters the second water purification chamber 54 through the filtering action of the second filter group 40 and flows out through the first water outlet 112, and the purified water flowing out is pressurized
  • the function of the pump enters the first water purification chamber 51 through the second water inlet 113.
  • the water flow in the first water purification chamber 51 passes through the filtering action of the first filter group 20 and enters the pure water chamber 52.
  • the water in the pure water chamber 52 flows through the first The second water outlet 114 flows out for users to drink.
  • the first water inlet 111 of the composite filter 100 is connected to the water pipe of the user's house, and the water flow in the water pipe passes through the first water inlet 111 to enter the water chamber 53, that is, the water pressure of the water chamber 53 is equal to the water pressure of the user's house.
  • the second water outlet 114 is connected to the atmosphere for the user to take water, that is to say the water pressure in the pure water chamber 52 is equal to the atmospheric pressure.
  • the water pressure of the tap water is much greater than the atmospheric pressure. Therefore, the inner tube 30 moves toward the inner wall of the housing 10 under the effect of the tap water pressure, and does not separate from the housing 10.
  • a first water purification chamber 51 is provided on the outer side of the first filter group 20, the water flow enters the first water purification chamber 51 after being pressurized, and then flows out from the second water outlet 114 through the filtering action of the first filter group 20, that is, the first When the filter group 20 filters, the water flow penetrates from the outside to the inside.
  • the booster pump pressurizes the water flow and then penetrates inward from the outside of the first filter group 20, thereby preventing high pressure
  • the water flow enters the outer side of the inner tube 30 and affects the difference between the inner and outer water pressures of the inner tube 30, thereby preventing the change in water pressure from affecting the stability of the inner tube 30.
  • a second water purification cavity 54 is defined inside the first filter group 20, and the high-pressure water flow in the tap water cavity 53 penetrates the first filter group 20 and flows out through the second water purification cavity 54, which can also prevent the water in the tap water cavity 53 High-pressure water flow leakage affects the pressure balance on the inner and outer sides of the inner tube 30.
  • the inner tube 30 includes an inner wall 31 and an inner lower cover 32.
  • the inner wall 31 is formed into a tubular shape extending in the axial direction of the housing 10, and the upper end of the inner wall 31 Open, the upper end of the inner wall 31 is sealingly connected to the inner wall of the housing 10, and the upper end of the inner wall 31 is open.
  • the second filter group 40 is provided in the inner wall 31 and extends in the axial direction of the inner wall 31 , And the length of the second filter group 40 is less than or equal to the length of the inner wall 31.
  • the inner lower cover 32 is connected to the lower end of the inner enclosure 31 and closes the lower end of the inner enclosure 31.
  • High-pressure tap water acts on the upper surface of the inner wall 31 and the inner lower cover 32 of the wall to provide a downward force to the inner tube 30.
  • the sealing effect of the inner tube 30 gradually increases. Not only can the inner tube 30 be prevented from detaching from the housing 10, but also the sealing effect of the composite filter element 100 can be improved.
  • the gap between the inner wall of the housing 10 and the outer wall of the first filter group 20 is 1.2 mm
  • the gap between the inner wall of the first filter group 20 and the outer wall of the inner tube 30 is 1.2 mm
  • the inner tube The gap between the inner wall of 30 and the outer wall of the second filter group 40 is 1.2 mm.
  • the inner wall of the housing 10, the inner wall of the first filter group 20, the outer wall of the first filter group 20, the inner wall of the inner tube 30, the outer wall of the inner tube 30 and the outer wall of the second filter group 40 cooperate to define the first purified water
  • the cavity 51, the second water purification cavity 54, the tap water cavity 53 and the pure water cavity 52 have a simple structure and are easy to realize, which is beneficial to simplify the structural design of the composite filter element 100 and can reduce the production cost of the composite filter element 100.
  • the first filter group 20 includes: a central tube 21, an RO filter membrane 22 and an annular inner cover 23, the central tube 21 extends along the axial direction of the housing 10, the central tube The upper end of 21 is open to define a filter material installation cavity 210, an inner tube 30 is provided in the center tube 21, a pure water cavity 52 is defined between the inner wall of the center tube 21 and the outer wall of the inner tube 30, and the RO filter membrane 22 is a reverse osmosis filter The membrane and the RO filter membrane 22 are sleeved on the central tube 21 and extend along the axial direction of the central tube 21.
  • the ring-shaped inner cover 23 is sleeved on the central tube 21, and the inner peripheral edge of the ring-shaped inner cover 23 is in sealing contact with the upper edge of the inner tube 30, and the lower surface of the ring-shaped inner cover 23 is in sealing fit with the upper end surface of the RO filter membrane 22.
  • the annular inner cover 23 is provided with a waste water port 232.
  • the annular inner cover 23 defines a waste water tank with an open lower surface.
  • the waste water tank extends along the circumferential direction of the annular inner cover 23, and RO filters
  • the upper end surface of the membrane 22 cooperates with the annular inner cover 23 to close the waste water tank to form a waste water chamber 231, and a waste water channel connecting the waste water chamber 231 and the third water outlet 115 is defined in the annular inner cover 23.
  • the RO filter element separates the waste water during the filtration process, and the waste water can be guided to be discharged by setting the waste water port 232, the waste water chamber 231 and the waste water channel. Limiting the waste water chamber 231 on the annular inner cover 23 can prevent the waste water from stringing into the first water purification chamber 51, the pure water chamber 52, the tap water chamber 53 and the second water purification chamber 54, thereby improving the quality of the filtered water flow.
  • the waste water of the RO filter element is discharged from the end of the RO filter element, and the waste water chamber 231 is limited to the annular inner cover 23, which can provide convenience for the waste water to enter the waste water chamber 231, and the structure is simple, eliminating the gap between the RO filter element and the waste water chamber 231
  • the diversion channel 1431 simplifies the structural design and waterway design of the composite filter element 100.
  • the top of the housing 10 is provided with a third water outlet 115 communicating with the waste water port 232, and the waste water in the waste water chamber 231 is discharged through the third water outlet 115, and a waste water plug 14 is provided on the third water outlet 115.
  • the casing 10 is connected, and when the waste water in the waste water chamber 231 reaches a certain pressure, the waste water plug 14 is opened and the waste water is discharged.
  • the second filter group 40 is a PAC filter element.
  • the second filter group 40 includes: a PAC skeleton 41 and a PAC filter membrane 42.
  • the PAC skeleton 41 is located in the inner tube 30 and along The axial extension of the tube 30, the PAC filter 42 is sleeved on the PAC skeleton 41 and extends along the axial direction of the PAC skeleton 41.
  • the PAC filter membrane 42 is sleeved on the PAC skeleton 41 and extends in the axial direction of the PAC skeleton 41.
  • the annular upper end cover 43 is sleeved on the water outlet pipe 60. The lower surface of the annular upper end cover 43 seals against the upper end surface of the PAC filter membrane 42 To prevent the water flow from passing through the PAC filter 42 and flowing out from the upper end surface of the PAC filter 42.
  • the PAC filter 42 is a tubular filter made of polyaluminum chloride material, and the thickness of the PAC filter 42 is greater than 10 mm.
  • the PAC filter 42 is a roll made of non-woven fabric, polypropylene layer, and carbon fiber, and has a long service life. When used in the filtration of tap water, it can initially remove sediment, rust and residual chlorine.
  • the second filter group 40 may also be formed by rolling only one or two layers of filter materials, which is not specifically limited here.
  • the filtering effect of the PAC filter membrane 42 is related to the wall thickness of the PAC filter membrane 42.
  • the filtration effect of the reverse osmosis filter element is related to the area of the filter membrane.
  • the filter material installation cavity 210 is defined in the reverse osmosis filter element, and the PAC filter membrane 42 is provided in the reverse osmosis filter element, which can reduce the volume of the PAC filter membrane 42 while ensuring the filtering effect of the PAC filter membrane 42, and thus can be reduced
  • the space occupied by the PAC filter membrane 42 can also reduce the production material of the PAC filter membrane 42 and thus can save costs.
  • the reverse osmosis filter element is arranged outside the PAC filter membrane 42 and the reverse osmosis filter element has a larger diameter and is the same in winding. In the case of an area filter membrane, the wall thickness of the reverse osmosis filter element can be reduced, and the space occupied by the reverse osmosis filter element can also be reduced.
  • the occupied space is small, which can maximize the utilization efficiency of the internal space of the housing 10, which is conducive to shrinking
  • the overall volume of the composite filter element 100 provides convenience for users.
  • the PAC skeleton 41 defines a second water purification cavity 54
  • the outer wall of the PAC filter 42 and the inner wall of the inner tube 30 define a tap water cavity 53
  • tap water enters the tap water cavity 53 through the first water inlet 111
  • the water flows through the PAC filter membrane 42 and passing through the filtering action of the PAC filter membrane 42 flows out from the inner wall of the PAC skeleton 41 into the second water purification chamber 54 and then flows out from the first water outlet 112.
  • the PAC filter 42 and the PAC skeleton 41 form a second filter group 40 and are arranged in the inner tube 30, which reduces the second filter group
  • the diameter of 40 can further reduce the occupied space of the second filter group 40, and can reduce the volume and production materials of the PAC filter 42, which is beneficial to reduce costs.
  • the PAC skeleton 41 is tubular, and a plurality of holes are formed in the wall of the PAC skeleton 41 through the wall of the PAC skeleton 41 along the thickness direction of the wall of the PAC skeleton 41.
  • the second filter group 40 further includes: a PAC upper end cap 43 and a PAC lower end cap 44, the PAC upper end cap 43 is sleeved on the upper end of the PAC skeleton 41, and the PAC upper end cap 43 The lower surface seals against the upper end surface of the PAC filter membrane 42, the PAC lower end cover 44 is sleeved on the lower end of the PAC skeleton 41, and the upper surface of the PAC lower end cover 44 seals against the lower end surface of the PAC filter membrane 42.
  • the tightness of the upper and lower ends of the PAC filter 42 can be improved to prevent the water flow in the PAC filter 42 from flowing out from the upper or lower end of the PAC filter 42, which can not only prevent the water flow from entering the outlet water Cavity 521, and can improve the tightness of the tap water cavity 53.
  • the outer edge of the upper end cap 43 of the PAC is formed with an upwardly turned down flange 431, and the inner wall of the upward turned flange 431 abuts against the outer peripheral wall of the PAC filter 42, and the upper flange
  • the outer wall of 431 and the inner wall of the inner tube 30 define a tap water channel, and the water flow enters the tap water cavity 53 from the first water inlet 111 through the tap water channel.
  • the outer edge of the lower end cap 44 of the PAC is formed with an upwardly folded lower flange 441, and the inner wall of the lower flange 441 abuts against the outer peripheral wall of the PAC filter 42.
  • the second filter group 40 is glued to the PAC lower end cap 44, the glued PAC lower end cap 44 and A good seal is formed between the second filter groups 40, so that water flows of different water qualities on both sides of the second filter group 40 are less likely to cross-flow at the bottom.
  • the rubber blocking ring 442 is sheathed on the water outlet pipe 60, and the outer periphery of the rubber blocking ring 442 is blocked on the outer side of the PAC lower end cover 44 in the circumferential direction.
  • the water outlet pipe 60 with the structure of the rubber stop ring 442 and the PAC lower end cover 44 can make the water pipe 60 separate from the rubber stop ring 442 during manufacturing, and does not affect the water outlet pipe 60 to be half-opened and mass-produced. After the manufacturing is completed, it is convenient to assemble the whole outlet pipe 60, and then assemble with the rubber retaining ring 442, the efficiency of processing and manufacturing is greatly improved.
  • the baffle ring 442 can also make the lower end cap 44 of the PAC and the second filter group 40 reduce the glue that overflows from the gap between the two when the glue is glued, and prevent the spilled glue from affecting the filtering effect.
  • the second filter group 40 is disposed around the water outlet pipe 60, the lower end cap 44 of the PAC is formed as an annular plate and connected to the end surface of the second filter group 40, and the rubber retaining ring 442 includes: a connecting ring and a seal The ring, the sealing ring becomes cylindrical and is sleeved on the outside of the second filter group 40 and the lower end cap 44 of the PAC, and the connecting ring extends radially inward from the edge of the seal ring away from the end of the second filter group 40.
  • the connecting ring can further seal the circumferential leakage of glue when sealing between the second filter group 40 and the lower end cap 44 of the PAC.
  • the sealing ring can increase the contact between the connecting ring and the lower end cap 44 of the PAC to prevent the glue from overflowing from the gap between the connecting ring and the lower end cap 44 of the PAC.
  • the lower peripheral edge of the seal ring is connected to the outer peripheral edge of the connecting ring, the inner peripheral wall of the sealing ring abuts against the outer peripheral wall of the PAC filter 42, and the cross section of the rubber ring 442 is formed into an L shape.
  • the lower end cover 44 of the PAC is provided with a locking protrusion 440
  • the rubber retaining ring 442 is provided with a locking hole (not shown) that cooperates with the locking protrusion 440.
  • the cooperation between the locking protrusion 440 and the locking hole can make the rubber retaining ring 442 to be sleeved on the water outlet pipe 60 and further be stuck on the lower end cap 44 of the PAC, so that the rubber retaining ring 442 can be easily assembled on the water outlet pipe 60 and the connection is increased Reliability and ease of assembly.
  • the baffle ring 442 can also be used as an independent component, so that it will not affect the glue effect of the second filter group 40, nor will it affect the filtration effect of the second filter group 40, and greatly improve Manufacturability.
  • the rubber retaining ring 442 protrudes outwardly to form a protrusion 443 corresponding to each locking hole, which can facilitate contact positioning of the rubber retaining ring 442 with external components.
  • the water outlet pipe 60 is an integral injection molded part, and the PAC lower end cap 44 is integrally injection-molded on the water outlet pipe 60.
  • the PAC lower end cover 44 and the water outlet pipe 60 are integrally injection-molded, which is convenient for manufacturing by using a mold, and the PAC lower end cover 44 has sufficient carrying capacity and is not easy to separate from the water outlet pipe 60. Prevent skew during long-term use.
  • the composite filter element 100 further includes: a third filter group 50, the third filter group 50 is disposed in the pure water chamber 52, and the third filter group 50 separates the pure water
  • the cavity 52 is divided into a raw pure water cavity 522 located outside the third filter group 50 and a water outlet cavity 521 located inside the third filter group 50.
  • the water outlet cavity 521 communicates with the second water outlet 114.
  • the pure water filtered by the first filter group 20 enters the original pure water cavity 522, the water flow in the original pure water cavity 522 passes through the third filter group 50, and enters the water outlet cavity through the filtering action of the third filter group 50 521, which can further remove impurities or odors in the water.
  • the first filter group 20 is an RO filter element.
  • the water filtered by the RO filter element becomes weakly acidic and has a poor taste, which is not suitable for users to drink directly.
  • the filtering effect of the active carbon filter element can further improve the quality of pure water. Improve the taste of drinking water.
  • setting the third filter group 50 in the pure water chamber 52 can further enhance the degree of compounding of the composite filter element 100 and enhance the filtering effect of the composite filter element 100 on water flow.
  • setting the third filter group 50 alone Not only can the water flow design of the composite filter element 100 be simplified, but also the volume of the composite filter element 100 can be reduced.
  • the third filter group 50 and the inner tube 30 are arranged along the axial direction of the first filter group 20, that is, the first filter group 20 is defined along the first filter The axially extending filter media mounting cavity 210 of the group 20.
  • the sum of the axial length of the inner tube 30 and the axial length of the third filter group 50 is less than or equal to the axial length of the filter material installation cavity 210, and the third filter group 50 is provided at the bottom of the filter material installation cavity 210, The inner tube 30 is provided on the top of the third filter group 50.
  • the third filter group 50 and the inner tube 30 arranged in the axial direction of the first filter group 20 can make full use of the space of the filter material installation cavity 210, which is helpful to reduce the inner diameter of the filter material installation cavity 210, and thus can reduce the first filter group
  • the diameter and volume of 20, and the structure of the third filter group 50 and the inner tube 30 of the above structure are simple and easy to assemble.
  • the composite filter element 100 further includes a water outlet pipe 60.
  • the water outlet pipe 60 penetrates the inner pipe 30 along the axial direction of the inner pipe 30, and the water outlet pipe 60 is inserted into the PAC skeleton 41
  • One end of the outlet pipe 60 (the lower end shown in FIG. 8) communicates with the outlet chamber 521, and the other end of the outlet pipe 60 (the upper end shown in FIG. 8) communicates with the second outlet 114, the inner wall of the PAC skeleton 41 and the outlet pipe
  • a second water purification cavity 54 is defined between the outer walls of 60.
  • the second water outlet 114 is located above the inner tube 30, and the water outlet cavity 521 is located in the third filter group 50 and below the inner tube 30.
  • the water outlet tube 60 By providing the water outlet tube 60, the water flow in the water outlet cavity 521 can be The outflow from the second water outlet 114 provides convenience, and the structure of the water outlet pipe 60 is simple and easy to implement.
  • the central tube 21 includes: a surrounding plate 211 and a lower cover plate 212, the surrounding plate 211 is formed into a cylindrical shape with open ends, and the RO filter membrane 22 is sleeved on the surrounding plate 211, the lower cover plate 212 is disposed in the surrounding plate 211 and is located at the lower part of the surrounding plate 211, the lower cover plate 212 closes the lower end opening of the surrounding plate 211 and cooperates with the surrounding plate 211 to define a filter material installation cavity 210, a third filter group The lower end of 50 stops against the upper surface of the lower cover 212.
  • the central tube 21 is formed into a cylindrical shape with an open upper end and a closed lower end.
  • the inner wall of the surrounding plate 211 and the upper surface of the lower cover plate 212 cooperate with the outer surface of the inner tube 30 to define a pure water chamber 52.
  • a pure water through hole 2111 is formed on the wall of the center tube 21, and the pure water through hole 2111 penetrates the wall of the center tube 21 along the thickness direction of the wall of the center tube 21, and the water flow enters the RO filter film 22 from the lower end of the RO filter film 22, RO
  • the filter membrane 22 separates the water flow into waste water and pure water.
  • the waste water flows out from the upper end of the RO filter membrane 22 and is discharged through the waste water chamber 231 and the third water outlet 115.
  • Pure water flows out from the inner wall of the RO filter membrane 22 and enters the pure water cavity 52 through the pure water through hole 2111, and is discharged through the second water outlet 114 for the user to drink.
  • a water guide groove 2112 communicating with the pure water through hole 2111 is formed on the outer peripheral wall of the surrounding plate 211.
  • the water guiding groove 2112 is recessed inward relative to the outer peripheral wall of the surrounding plate 211, and the water flow filtered by the RO filter membrane 22 passes through The water guiding groove 2112 flows into the pure water through hole 2111, and then collects in the filter material installation cavity 210, and then leads out.
  • the RO filter membrane 22 is wound around the surrounding plate 211, by providing the water guide groove 2112 on the surrounding plate 211, the flow efficiency of the outflow of water from the RO filter membrane 22 can be increased, and the water outlet efficiency of the RO filter membrane 22 can be increased, thereby improving the RO Water purification efficiency of the filter element assembly.
  • the water guiding groove 2112 extends along the circumferential direction of the surrounding plate 211, that is to say, the water guiding groove 2112 is formed in a ring shape extending along the circumferential direction of the surrounding plate 211, and the pure water through hole 2111 is provided in the water guiding groove 2112, thereby
  • the length of the water guiding groove 2112 can be further increased, and the water outlet efficiency of the RO filter membrane 22 can be further improved.
  • the water outlet efficiency of the RO filter membrane 22 can be ensured to be uniform in the circumferential direction to prevent the partial water outlet obstruction from affecting the water purification efficiency of the RO filter membrane 22.
  • the central tube 21 of the above structure is closed at the lower end, which can prevent the pure water flow from leaking from the lower end of the pure water chamber 52. During the assembly process of the RO filter element, only need to pay attention to the tightness of the upper end of the central tube 21.
  • a support platform 213 extending in the axial direction of the third filter group 50 is provided in the filter material installation cavity 210.
  • the support platform 213 abuts the lower end of the inner tube 30 and Between the bottom walls of the filter material installation cavity 210, that is, a support table 213 may be provided outside the third filter group 50, the inner tube 30 is supported by the support table 213, and the support table 213 is used to define the support table 213.
  • the distance that the inner tube 30 slides downward prevents the inner tube 30 from continuously sliding downward, and can prevent damage to the third filter group 50 due to excessive water pressure in the inner tube 30.
  • the plurality of supporting tables 213 are spaced apart along the circumferential direction of the third filter group 50.
  • the supporting strength of the supporting table 213 can be improved, and the inner tube 30 can be promoted Even by force.
  • the squeezing effect of the inner tube 30 on the third filter group 50 is reduced to prevent the excessive pressure of the inner tube 30 from damaging the third filter group 50, which is beneficial to prolong the service life of the third filter group 50.
  • the spaced-apart support tables 213 can promote water flow through the third filter group 50, the water flow passes between adjacent support tables 213, and then passes through the third filter group 50 into the water outlet cavity 521.
  • the supporting table 213 extends along the circumferential direction of the surrounding board 211, that is, the supporting table 213 is formed in a ring shape extending along the circumferential direction of the surrounding board 211, and the supporting table 213 may also be formed along the axial direction of the surrounding board 211
  • the lower end of the support table 213 abuts against the upper surface of the lower cover plate 212 of the central tube 21, and the third filter group 50 is provided in the support table 213.
  • the tubular support platform 213 can improve the uniformity of the inner tube 30 and prevent the inner tube 30 from being damaged or tilted due to uneven force.
  • the support table 213, the surrounding plate 211 and the lower cover plate 212 are integrally formed, that is to say, the central tube 21 is an integrally formed piece, and the integrally formed central tube 21 can lift between the supporting table 213, the surrounding plate 211 and the lower cover plate 212
  • the connection stability and strength of the connection can further improve the functional stability and reliability of the center tube 21, and can eliminate the connection mechanism between the support table 213, the surrounding plate 211 and the lower cover plate 212, and improve the center tube 21 and the composite
  • the assembly efficiency of the filter element 100, and the strength of the integrally formed central tube 21 are large, and the service life is long.
  • the housing 10 includes: a barrel 11 and a lower cover 12, the bottom of the barrel 11 is open, the first filter group 20 is provided in the barrel 11, and the lower cover 12 is closed The lower end of the barrel 11.
  • the first water inlet 111, the first water outlet 112, the second water inlet 113, and the second water outlet 114 are all provided on the top of the barrel 11, and the lower cover 12 is connected to the barrel 11 to close the opening of the barrel 11 And the upper surface of the lower cover 12 is in sealing contact with the lower end surface of the first filter group 20.
  • the housing 10 is further provided with four adapters 13.
  • the four adapters 13 are inserted into the first water inlet 111, the first water outlet 112, and the second water inlet 113 in a one-to-one correspondence.
  • the adapter 13 is provided to provide convenience for the composite filter 100 to assemble the waterway, and to improve the airtightness of the waterway.
  • a waste water plug 14 is provided at the third water outlet 115.
  • the waste water plug 114 is inserted into the third water outlet 115.
  • the waste water plug 14 generates a certain resistance to the water in the waste water chamber 231.
  • the waste water plug 14 is turned on, and the waste water is discharged from the waste water chamber 231.
  • the waste water plug 14 includes: a sleeve 140 and a plurality of capillaries 143.
  • the sleeve 140 is inserted into the waste water outlet 115 and connected to the housing 10
  • the capillary 143 is provided on the inner wall of the sleeve 140 and extends inward in the radial direction of the sleeve 140.
  • capillaries 143 There are a large number of capillaries 143.
  • a plurality of capillaries 143 are arranged along the circumferential direction of the sleeve 140 to form a group of capillaries 143.
  • the plurality of capillaries 143 are filled in the sleeve 140 along the axial direction of the sleeve 140.
  • the waste water plug 14 of the above structure has a simple structure and is easy to manufacture, and can effectively improve the water purification effect of the RO filter element assembly 20.
  • the sleeve 140 includes: a plug-in section 141 and a guide section 142, one end of the plug-in section 141 is inserted in the waste water outlet 115, and the plug-in section 141 is along the waste water outlet The axial extension of 115, the guide section 142 communicates with the other end of the plug section 141.
  • a capillary 143 is provided in both the insertion section 141 and the guide section 142, or the capillary 143 may be provided in only one of the insertion section 141 and the guide section 142.
  • the sleeve 140 of the above structure can not only increase the water pressure of the waste water outlet 115, but also insert the insertion section 141 in the waste water outlet 115, which has good stability and tightness.
  • the guide section 142 is suitable for connecting the waste water outlet 115 and the waste water drainage pipe Among them, the guide section 142 is perpendicular to the insertion section 141, which facilitates the connection of the wastewater drainage pipe to the guide section 142, and can provide convenience for wastewater discharge.
  • a capillary 143 is provided in the insertion section 141, and the radial inner end of the capillary 143 cooperates to define a diversion channel 1431.
  • the diameter of the channel 1431 is small.
  • the guide section 142 is provided with a water guide column 1421 extending along the axial direction of the guide section 142.
  • the water guide column 1421 closes the guide channel 1431.
  • the water guiding column 1421 closes the guiding channel 1431, and the water flows through the capillary 143 from the insertion section 141 to the guiding section 142, so that the waste water plug 14 can pressurize the waste water chamber 231.
  • the housing 10 is also provided with a decorative cover 15, the decorative cover 15 is disposed on the top of the barrel 11, the first water inlet 111, the first water outlet 112, the second water inlet 113, the second water outlet 114 and the first The three water outlets 115 are all covered in the decorative cover 15, thereby improving the uniformity of the appearance of the composite filter element 100.
  • a handle 16 is also provided on the top of the barrel 11, and a first connection point and a second connection point are arranged on the side wall of the barrel 11, and the handle 16 One end is connected to the first connection point, and the other end is connected to the second connection point.
  • a fixed structure 17 is provided on the housing 10, and a matching structure 161 is provided on the handle 16, and the matching structure 161 can rotate and cooperate with the fixed structure 17.
  • the handle 16 can be rotatably connected to the housing 10, and it is convenient to directly take the handle 16 without holding the housing 10 when the composite filter element assembly 100 is taken and placed .
  • the mating structure 161 has a first position and a second position relative to the fixed structure 17 in the direction of rotation. In the first position, the mating structure 161 can be plugged and connected to the fixed structure 17. In the second position, the mating structure 161 and the fixed structure 17 Engage to form anti-off structure.
  • the mating structure 161 on the handle 16 can rotate in the fixed structure 17 and change between the first position and the second position. In the first position, the mating structure 161 and the fixed structure 17 are convenient to connect, and only the mating structure 161 needs to be connected by pulling out In the fixed structure 17, the handle 16 is therefore easy to install on the housing 10.
  • the mating structure 161 and the fixing structure 17 are engaged with each other, so that the mating structure 161 and the fixing structure 17 form a firmer connection, which can be prevented from coming off, thereby facilitating lifting, and preventing the lifting of the handle 16 during the process
  • the handle 16 is separated from the housing 10.
  • the composite filter element assembly 100 with the structure of the handle 16 in the present application has the convenience of installation. And the bearing performance during installation and use.
  • the limit post 1712 faces the guide groove 16112 when the handle 16 with the above connection and fitting structure is in the first position.
  • the guide post 1711 is inserted into the sleeve 16111, and the limit post 1712 is inserted into the guide groove 16112. That is, in the first position, the guide post 1711 and the limit post 1712 are simultaneously inserted from the sleeve 16111 and the guide groove 16112 without obstruction, and the guide post 1711 and the limit post 1712 can also be removed from the sleeve 16111 and the guide groove without obstruction Pull out in 16112 to facilitate the installation of the handle 16 on the housing 10.
  • the limit post 1712 In the second position, as shown in FIGS. 18 and 19, the limit post 1712 is snapped into the snap hole 16113. That is, when the limit post 1712 rotates from the first position into the second position, the limit post 1712 is inserted into the card hole 16113 by the guide groove 16112, and the card hole 16113 prevents the limit post 1712 from moving in the axial direction.
  • the fixing structure 17 that cooperates with the first plug structure 1611 is referred to as a first fixing structure 171
  • the fixing structure 17 that cooperates with the second plug structure 1612 is referred to as a second fixing structure 172.
  • first”, “second”, and “third” may explicitly or implicitly include one or more of the features, used to distinguish the features described, no order, no importance .
  • the guide groove 16112 extends in the axial direction of the sleeve 16111.
  • moving the sleeve 16111 in the axial direction can move the locking hole 16113 to the limit column 1712, and then rotate the handle 16 to make the limit column 1712 Stuck in the card hole 16113.
  • the guide groove 16112 spirally extends in a direction from the end to the card hole 16113, that is, the guide groove 16112 is a spiral extension groove.
  • the sleeve 16111 When the sleeve 16111 is inserted into the guide post 1711, the sleeve 16111 must be rotated along the axial direction while rotating the sleeve 16111 (similar to the action of screwing) to move the card hole 16113 to the limit post 1712 and then rotate By carrying the handle 16, the limit post 1712 can be caught in the card hole 16113.
  • the guide groove 16112 and the clamping hole 16113 both penetrate the sleeve 16111 in the thickness direction of the sleeve 16111. In this way, it is also very convenient to machine the guide groove 16112 and the clamping hole 16113 on the sleeve 16111.
  • the present application is not limited to this, for example, the guide groove 16112 and the clamping hole 16113 may also be provided on the inner wall of the sleeve 16111, and the above functions can also be achieved.
  • the mating structure 161 is a second plug-in structure 1612.
  • the second plug-in structure 1612 includes a plug-in post 16121, and an end of the plug-in post 16121 is provided with a card Block 16123, as shown in FIG. 26, the arrangement of the block 16123 makes the contour of the end of the post 16121 non-circular.
  • a groove 1721 is defined in the fixing structure 17, and the end of the groove 1721 has a constriction 1722 formed as a non-circular shape to fit the end of the post 16121.
  • the choke 1722 here is formed as a non-circular shape that fits the end of the post 16121, which means that when the handle 16 is in the first position, the shape of the end of the post 16121 corresponds to the shape of the choke 1722 Consistent, of course, the shrinkage 1722 is slightly larger than the end of the post 16121.
  • the internal shape of the groove 1721 is not limited, as long as the insertion post 16121 can be rotated to the second position after the insertion post 16121 is inserted into the groove 1721, that is, in the second position, the inside of the groove 1721 cannot interfere with the block 16123.
  • the insertion post 16121 can be inserted into the groove 1721 through the narrowing 1722, and in the second position, the locking block 16123 is stuck inside the narrowing 1722.
  • the insertion post 16121 is provided with a coaxially arranged jack 16122, and the groove 1721 is provided with a connection post 1724, and the connection post 1724 is inserted into the jack 16122.
  • the connecting post 1724 and the socket 16122 cooperate with each other.
  • the handle 16 when in the first position, the handle 16 is installed on the housing 10, which can play a certain guiding role.
  • the handle 16 rotates from the first position to the first position. In the second position, a rotation axis is provided.
  • the connecting post 1724 can serve as a load-bearing rod and play a certain supporting role.
  • the outer shape of the end of the post 16121 is half semicircular, the other half semielliptical, and the shape of the recess 1722 of the groove 1721 is half It is semi-circular and the other half is semi-elliptical.
  • the two form a fit, which makes it easy to identify and assemble the handle 16;
  • the stable support function makes it difficult for the handle 16 to escape from the outside of the housing 10.
  • the RO filter membrane 22 is first wound around the central tube 21, and then the third filter group 50 is set in the filter material installation cavity 210, and then the inner tube 30 is assembled in the filter material installation cavity 210 Inner, the lower end of the inner tube 30 stops against the third filter group 50, and then the outlet pipe 60 is inserted into the inner tube 30, then the second filter group 40 is sleeved on the outlet pipe 60, and finally the annular inner cover 23 is covered Set on the central tube 21, the water outlet tube 60 and the PAC upper end cap 43 protrude from the middle of the annular inner cap 23.
  • the first filter group 20 is inserted into the barrel 11, and the top wall of the cavity of the barrel 11 is provided with a first water channel, a second water channel, a third water channel, a fourth water channel and a fifth water channel, the first water channel is connected
  • the second water outlet 114 and the water outlet pipe 60 one end of the second water channel communicates with the first water inlet 111, and the other end communicates with the passage between the outer peripheral wall of the PAC upper end cap 43 and the inner peripheral wall of the ring-shaped inner cover 23; one end of the third water channel communicates
  • the first water outlet 112 has the other end connected to the passage between the inner peripheral wall of the PAC upper end cap 43 and the outer peripheral wall of the water outlet pipe 60, one end of the fourth water passage communicates with the second water inlet 113, and the other end communicates with the outer peripheral wall of the RO filter membrane 22 With the passage between the inner peripheral wall of the barrel 11, the fifth water passage communicates the third water outlet 115 and the waste water outlet 232.
  • the central axis of the first filter group 20, the central axis of the second filter group 40, the central axis of the inner tube 30, and the central axis of the outlet pipe 60 coincide with the central axis of the housing 10.
  • the outlet pipe 60, the second filter group 40, the inner pipe 30, the first filter group 20 and the housing 10 are nested in this order, so that the outlet pipe 60, the second filter group 40, the inner pipe 30 can be reduced
  • the occupied space of the first filter group 20 improves the utilization efficiency of the internal space of the composite filter element 100, and thus can reduce the volume of the housing 10, which provides convenience for the use and assembly of the composite filter element 100.
  • the following specific embodiments use purified tap water as an example to describe the three-stage filtration function of the composite filter element 100, and explain the highly integrated design structure of the composite filter element 100, and the handle 16 for the composite filter element 100 to be easily accessed.
  • the second filter group 40 will be described by taking a roll-type primary filter made of non-woven fabric, polypropylene layer, carbon fiber, and PAC carriage 41 as an example;
  • the first filter group 20 uses a reverse osmosis filter as the middle Take filtering as an example.
  • the third filter group 50 will be described using cylindrical hollow carbon rods as final filtration.
  • a composite filter element 100 is installed in a vertical state under normal conditions.
  • the composite filter element 100 includes a housing 10, a first filter group 20, an inner tube 30, a second filter group 40, a third filter group 50, a water outlet tube 60, and a rubber ring 442.
  • the housing 10 defines a filter cavity
  • the first filter group 20 is disposed in the filter cavity
  • the first filter group 20 defines a filter material installation cavity 210 with one side open
  • the inner tube 30 is detachably disposed in the filter material installation cavity
  • the second filter group 40 is provided in the inner tube 30.
  • the outer wall of the first filter group 20 and the inner wall of the housing 10 define a first water purification chamber 51 communicating with the second water inlet 113, and the inner wall of the first filter group 20 and the outer wall of the inner tube 30 define a second water outlet 114
  • the pure water chamber 52, the inner wall of the inner tube 30 and the outer wall of the second filter group 40 define a tap water chamber 53 that communicates with the first water inlet 111, and the second filter group 40 defines a second net that communicates with the first water outlet 112 ⁇ ⁇ 54.
  • the upper part of the housing 10 is also provided with a waste water port 232 communicating with the first filter group 20.
  • the inner tube 30 and the third filter group 50 are arranged in the filter material installation cavity 210 forward and backward in the axial direction, the pure water cavity 52 is formed inside the central tube 21 in the first filter group 20, and the third filter group 50 will
  • the pure water chamber 52 is divided into an external original pure water chamber 522 and an internal water outlet chamber 521.
  • Two ends of the upper part of the casing 10 near the decorative cover 15 are respectively provided with a connection point to be connected to the handle 16.
  • One end of the water outlet pipe 60 communicates with the second water outlet 114. After the other end of the water outlet pipe 60 penetrates the inner pipe 30 along the axial direction of the inner pipe 30, it extends out of the inner pipe 30 and into the PAC carriage 41 of the third filter group 40 , ⁇ ⁇ ⁇ 521.
  • the second filter group 40 is disposed around the water outlet pipe 60, the PAC lower end cover 44 and the water outlet pipe 60 are integrally injection molded, and the PAC lower end cover 44 is formed as an annular plate and connected to the end surface of the second filter group 40.
  • the rubber retaining ring 442 includes a connecting ring and a sealing ring.
  • the sealing ring is cylindrical and is sleeved on the outside of the second filter group 40 and the lower end cap 44 of the PAC.
  • the connecting ring extends from the edge of the sealing ring away from the end of the second filter group 40 Extend inward.
  • the lower end cover 44 of the PAC is provided with a plurality of locking protrusions 440, and the rubber blocking ring 442 is provided with a locking hole matching with the locking protrusion 440.
  • the rubber blocking ring 442 is sleeved on the water outlet pipe 60, the locking protrusion 440 and the locking hole are locked with each other Then cooperate.
  • the entire tap water filtration process is that tap water enters the tap water chamber 53 from the first water inlet 111 and flows radially inward, enters the second water purification chamber 54 through the filtering action of the second filter group 40 and flows out through the first water outlet 112 .
  • the outflowing purified water enters the first water purification chamber 51 through the second water inlet 113 through the function of the booster pump.
  • the water flow in the first water purification chamber 51 passes through the filtering action of the first filter group 20 and enters the original pure water chamber 522.
  • the water in the pure water chamber 522 is filtered by the third filter group 50 and enters the water outlet chamber 521, and then flows upward from the water outlet pipe 60 to flow out from the second water outlet 114 for the user to drink.
  • the matching structure of the rubber retaining ring 442 of the present application and the PAC lower end cap 44 can also be used in other parts of the filter element assembly that require rubber retaining, which is not limited to the retaining of the water outlet pipe 60 of the composite filter element 100 mentioned in this application
  • the glue block between the glue plate 44 and the second filter group 40 when glue is applied is not limited to the retaining of the water outlet pipe 60 of the composite filter element 100 mentioned in this application.
  • the water treatment device includes the composite filter element 100 described in the above embodiment.
  • the volume of the water treatment device can be reduced, the occupied space can be saved, and it can be improved.
  • the stability of the water treatment device prevents water leakage.
  • Some water treatment devices also include a booster pump and a tank.
  • the tank is provided with a water supply device, a water outlet, and a drain.
  • the composite filter 100 and the booster pump are provided in the tank.
  • the water supply device communicates with the first water inlet 111
  • a booster pump is connected between the first water outlet 112 and the second water inlet 113 for boosting the water flowing out of the second water purification chamber 54 and pumping it into the first water purification chamber 51
  • the water outlet is connected to the second water outlet 114 for users to take water, and the water outlet is connected to the third water outlet 115 for discharging waste water.
  • the water treatment device includes the composite filter element 100 described in the above embodiment.
  • the volume of the water treatment device can be reduced, the occupied space can be saved, and the water quality can be improved , Which provides convenience for users.

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

Abstract

一种复合滤芯和具有其的水处理装置，复合滤芯包括：壳体、第一过滤组、内管和第二过滤组，所述第一过滤组设在所述壳体内，且所述第一过滤组内限定有滤材安装腔，所述内管设在所述滤材安装腔内，所述第二过滤组设在所述内管内。

Description

复合滤芯和具有其的水处理装置
相关申请的交叉引用
本申请基于申请号为201811289499.7、申请日为2018年10月31日的中国专利申请、申请号为201821792306.5、申请日为2018年10月31日的中国专利申请、申请号为201811291322.0、申请日为2018年10月31日的中国专利申请、申请号为201821790310.8、申请日为2018年10月31日的中国专利申请以及申请号为201821791222.X、申请日为2018年10月31日的中国专利申请提出，并要求上述中国专利申请的优先权，上述中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本申请属于家用电器技术领域，具体地，涉及一种复合滤芯和具有其的水处理装置。
背景技术
相关技术中，诸如净饮机之类的水处理装置，包括多个分级滤芯，占用空间较大，而且通量较小，不仅占用了较大的室内空间，为用户使用带来了较大的不便，而且不能满足用户的用水需求。
发明内容
本申请旨在至少解决现有技术中存在的技术问题之一。
为此，本申请提出一种复合滤芯，所述复合滤芯的体积较小，节省占用空间。
本申请还提出一种具有上述复合滤芯的水处理装置。
根据本申请第一方面实施例的复合滤芯，包括：壳体；第一过滤组，所述第一过滤组设在所述壳体内，且所述第一过滤组内限定有滤材安装腔；内管，所述内管设在所述滤材安装腔内；第二过滤组，所述第二过滤组设在所述内管内。
根据本申请实施例的复合滤芯，将第二过滤组设在内管内，并将内管设在第一过滤组内，也就是说第一过滤组、内管和第二过滤组依次嵌套设置，可以充分利用第一过滤组内的空间，而且利用内管将第一过滤组和第二过滤组间隔开复合在壳体内，原来一个过滤管的空间容纳两个过滤管，节省了第一过滤组和第二过滤组的占用空间。
在一些可选实施例中，所述内管可拆卸地设在所述滤材安装腔内。
在一些可选实施例中，所述第一过滤组为RO滤芯，所述第二过滤组为PAC滤芯， 所述PAC滤芯的壁厚大于10mm。
在一些可选实施例中，所述壳体上设有第一进水口、第一出水口、第二进水口和第二出水口；所述第一过滤组的外壁与所述壳体的内壁限定出连通所述第二进水口的第一净水腔；所述第一过滤组的内壁与所述内管的外壁限定出连通所述第二出水口的纯水腔；所述内管的内壁与所述第二过滤组的外壁限定出连通所述第一进水口的自来水腔；所述第二过滤组内限定有连通所述第一出水口的第二净水腔。
在一些可选实施例中，所述第一过滤组包括：中心管，所述滤材安装腔设在所述中心管内，所述中心管的壁上形成有纯水通孔；RO滤膜，所述RO滤膜套设在所述中心管上；环形内盖，所述环形内盖套设在所述中心管上，所述环形内盖的内周沿与所述内管的上端沿相连，且所述环形内盖的下端面与所述RO滤膜的上端面止抵。
在一些可选实施例中，所述环形内盖内限定有向下敞开的废水槽，所述RO滤膜的上端面与所述环形内盖配合封闭所述废水槽形成废水腔，所述内盖顶部设有连通所述废水腔的废水口。
可选地，所述壳体的顶部设有连通所述废水口的第三出水口。
在一些可选实施例中，所述第二过滤组包括：PAC骨架，所述PAC骨架位于所述内管内并沿所述内管的轴向延伸，所述第二净水腔设在所述PAC骨架内；PAC滤膜，所述PAC滤膜套设在所述PAC骨架上并沿所述PAC骨架的轴向延伸，所述自来水腔限定在所述PAC滤膜的外周壁与所述内管的内周壁之间。
具体地，所述PAC骨架为管状，所述PAC骨架的内腔连通所述第一出水口，所述PAC骨架的壁上形成有净水通孔。
进一步地，所述第二过滤组还包括：PAC上端盖，所述PAC上端盖套设在所述PAC骨架的上部，所述PAC上端盖的下表面密封抵接所述PAC滤膜的上端面，所述PAC上端盖上限定有连通所述自来水腔与所述第一进水口的第一通水孔和连通所述第二净水腔与所述第一出水口的第二通水孔；PAC下端盖，所述PAC下端盖套设在所述PAC骨架的下部，所述PAC下端盖的上表面密封抵接所述PAC滤膜的下端面。
在一些可选实施例中，所述PAC上端盖的外周沿形成有向下翻折的上翻边，所述上翻边的内壁止抵所述PAC滤膜的外周壁；所述PAC下端盖的外周沿形成有向上翻折的下翻边，所述下翻边的内壁止抵所述PAC滤膜的外周壁。
在一些可选实施例中，复合滤芯还包括：第三过滤组，所述第三过滤组设在所述纯水腔内，所述第三过滤组将所述纯水腔分割成位于所述第三过滤组外的原纯水腔和位于所述第三过滤组内的出水腔，所述出水腔连通所述第二出水口。
在一些可选实施例中，所述第三过滤组与所述内管沿所述第一过滤组的轴向排列。
在一些可选实施例中，复合滤芯还包括：出水管，所述出水管沿所述内管的轴向贯穿所述内管，所述出水管的一端连通所述出水腔，所述出水管的另一端连通所述第二出水口。
在一些可选实施例中，所述壳体包括：筒体，所述筒体的底部敞开，所述第一过滤组设在所述筒体内，所述第一进水口、所述第一出水口、所述第二进水口和所述第二出水口均设在所述筒体的顶部；下盖，所述下盖与所述筒体相连以封闭所述筒体的敞开口，且所述下盖的上表面与所述第一过滤组的下端面密封抵接。
在一些可选实施例中，所述第一过滤组的中心轴线、所述第二过滤组的中心轴线、所述内管的中心轴线与所述壳体的中心轴线重合。
在一些可选实施例中，所述内管的一端敞开，所述内管的敞开端的外沿与所述滤材安装腔的内周壁密封抵接，所述内管内侧的水压大于所述内管外侧的水压。
在一些可选实施例中，所述内管的顶部敞开，且所述滤材安装腔上部的内直径在从上到下的方向上保持不变或逐渐减小。
在一些可选实施例中，所述滤材安装腔内所述内管轴向方向上的长度大于所述内管的长度。
在一些可选实施例中，所述内管上端沿的外直径等于所述滤材安装腔的上端沿的内直径。
在一些可选实施例中，所述内管的外周壁与所述中心管的内壁之间设有密封圈。
在一些可选实施例中，所述内管的外周壁的上部形成有密封圈安装槽，所述密封圈安装槽沿所述内管的周向延伸。
在一些可选实施例中，所述滤材安装腔内设有沿所述第三过滤组的轴向延伸的支撑台，所述支撑台抵接在所述内管的下端与所述滤材安装腔的底壁之间。
在一些可选实施例中，所述支撑台为多个，多个所述支撑台沿所述第三过滤组的周向间隔开设置。
在一些可选实施例中，复合滤芯还包括：出水管，所述出水管的一端连通所述第二出水口，所述出水管的另一端沿所述内管的轴向贯穿所述内管后，伸出所述内管并伸到所述滤材安装腔中，其中，所述出水管的外周壁上设有PAC下端盖，所述第二过滤组胶粘在所述PAC下端盖上；挡胶环，所述挡胶环外套在所述出水管上，所述挡胶环的外周沿挡在所述PAC下端盖的周向外侧。
在一些可选实施例中，所述第二过滤组环绕所述出水管设置，所述PAC下端盖形成为环形板且连接在所述第二过滤组的端面上，所述挡胶环包括：连接环和密封环，所述密封环形成为筒形且套在所述第二过滤组和所述PAC下端盖的外侧，所述连接环从 所述密封环的远离所述第二过滤组的一端边沿沿径向向内延伸。
在一些可选实施例中，所述PAC下端盖上设有卡凸，所述挡胶环上设有与所述卡凸配合的卡孔。
在一些可选实施例中，所述出水管为一体注塑成型件，且所述出水管上一体注塑出所述PAC下端盖。
根据本申请第二方面实施例的水处理装置，包括根据上述实施例所述的复合滤芯。
根据本申请第二方面实施例的水处理装置，结构紧凑，有利于减小整体体积。
本申请的附加方面和优点将在下面的描述中部分给出，部分将从下面的描述中变得明显，或通过本申请的实践了解到。
附图说明
本申请的上述和/或附加的方面和优点从结合下面附图对实施例的描述中将变得明显和容易理解，其中：
图1是根据本申请实施例的复合滤芯的结构示意图；
图2是根据本申请实施例的复合滤芯的位于壳体内结构的示意图；
图3是沿图1中A-A线的剖视图；
图4是沿图2中B-B线的剖视图；
图5是图4中机构的爆炸图；
图6是根据本申请实施例的复合滤芯的壳体的爆炸图；
图7是根据本申请实施例的内管和第三过滤组的配合示意图；
图8是沿图7中C-C线的剖视图；
图9是根据本申请实施例的环形内盖的结构示意图；
图10是根据本申请实施例的环形内盖的剖视图；
图11是根据本申请实施例的环形内盖的俯视图；
图12是根据本申请实施例的中心管的结构示意图；
图13是根据本申请实施例的中心管的剖视图；
图14是根据本申请实施例的中心管的侧视图；
图15(a)是根据本申请实施例的废水塞的结构示意图；
图15(b)是根据本申请实施例的废水塞的剖视图；
图16为本申请一些实施例的复合滤芯组件的第一固定结构与第一插接结构在第一位置时的配合关系示意图；
图17为本申请一些实施例的第一固定结构与第一插接结构在第一位置配合时的局 部放大示意图；
图18为本申请一些实施例的复合滤芯组件的第一固定结构与第一插接结构在第二位置时的配合关系示意图；
图19为本申请一些实施例的第一固定结构与第一插接结构在第二位置配合时的局部放大示意图；
图20为本申请一些实施例的带第一插接结构的提手的立体结构示意图；
图21为本申请一些实施例的复合滤芯组件的第二固定结构与第二插接结构在第一位置时的配合关系示意图；
图22为本申请一些实施例的第二固定结构与第二插接结构在第一位置配合的局部结构示意图；
图23为本申请一些实施例的复合滤芯组件的第二固定结构与第二插接结构在第二位置时的配合关系示意图；
图24为本申请一些实施例的第二固定结构与第二插接结构在第二位置配合时的结构示意图；
图25为本申请一些实施例的复合滤芯组件的第二固定结构与第二插接结构的俯视图；
图26为本申请一些实施例的带第二插接结构的提手的立体结构示意图；
图27为图3中局部放大图；
图28为一些实施例中出水管和挡胶环的局部放大示意图。
附图标记：
100：复合滤芯；
10：壳体；11：筒体；111：第一进水口；112：第一出水口；113：第二进水口；114：第二出水口；115：第三出水口；12：下盖；13：转接头；14：废水塞；140：套管；141：插接段；142：导向段；1421：导水柱；143：毛细管；1431：导流通道；15：装饰盖；16：提手；161：配合结构；1611：第一插接结构；16111：轴套；16112：导向槽；16113：卡孔；1612：第二插接结构；16121：插柱；16122：插孔；16123：卡块；17：固定结构；171：第一固定结构；1711：导向柱；1712：限位柱；172：第二固定结构；1721：凹槽；1722：缩口；1724：连接柱；。
20：第一过滤组；21：中心管；210：滤材安装腔；211：围板；2111：纯水通孔；2112：导水槽；212：下盖板；213：支撑台；22：RO滤膜；23：环形内盖；231：废水腔；232：废水口；
30：内管；31：内围板；32：内下盖；301：密封圈；
40：第二过滤组；41：PAC骨架；42：PAC滤膜；43：PAC上端盖；431：上翻边；44：PAC下端盖；440：卡凸；441：下翻边；442：挡胶环；443：凸起；
50：第三过滤组；51：第一净水腔；52：纯水腔；521：出水腔；522：原纯水腔；53：自来水腔；54：第二净水腔；
60：出水管。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，仅用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”、“轴向”、“径向”、“周向”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以具体情况理解上述术语在本申请中的具体含义。
下面参考图1-图28描述根据本申请实施例的复合滤芯100和具有其的水处理装置。
如图1和3所示，根据本申请实施例，复合滤芯100包括：壳体10、第一过滤组20、内管30和第二过滤组40。
具体而言，第一过滤组20设在壳体10内，且第一过滤组20内限定有滤材安装腔210，通过在第一过滤组20内设置滤材安装腔210，内管30设在滤材安装腔210内，第二过滤组40设在内管30内。
其中，内管30形成为一端敞开另一端封闭的管状，内管30将可以将滤材安装腔210间隔成内腔和外腔，第二过滤组40设在内腔内，由于滤材安装腔210的一侧敞开，水 流不仅可以穿过第一过滤组20从而经过第一过滤组20的过滤，还可以通过滤材安装腔210的敞开口进入内腔，并经过第二过滤组40的过滤作用。
由此，根据本申请实施例的复合滤芯100，将第二过滤组40设在内管30内，并将内管30设在第一过滤组20内，也就是说，第一过滤组20、内管30和第二过滤组40依次嵌套设置，可以充分利用第一过滤组20内的空间，而且利用内管30将第一过滤组20和第二过滤组40间隔开复合在壳体10内，不仅提升了复合滤芯100的过滤效果，而且原来容纳一个滤芯的空间可以容纳两个过滤管，节省了第一过滤组20和第二过滤组40的占用空间。
可选地，内管30可拆卸地设在滤材安装腔210内，可拆卸设置的内管30装配简单，为第一过滤组20装配提供方便。
内管30的一端敞开，内管30设在壳体10内并将壳体10的内腔间隔成内外两腔，第一过滤组20位于外腔，第二过滤组40位于内腔。
内管30形成为一端敞开的筒状，筒状内管30的封闭端伸入壳体10内，内管30的敞开口与壳体10的内壁密封相连。
如图3所示，内管30内侧的水压大于内管30外侧的水压，内管30内部的压力大于内管30与壳体10之间的压力，在内管30内部高压的作用下，内管30的受力方向是朝向壳体10内部的，也就是说，压力只会将内管30朝向壳体10的内部压，可以防止内管30脱离壳体10。
由此，根据本申请实施例的复合滤芯100，利用内管30将第一过滤组20和第二过滤组40间隔开复合在壳体10内，不仅可以节省第一过滤组20和第二过滤组40的占用空间，还能提升复合滤芯100的过滤效果。而且内管30的内侧水压大于外侧水压，随着复合滤芯100的使用，内管30在水压的作用下逐渐朝壳体10的内侧移动，由此可以逐渐提升内管30与壳体10的配合稳定性，防止内管30脱离。
滤材安装腔210的顶部敞开，内管30的顶部敞开，内管30从滤材安装腔210的顶部安装在第一过滤组20内，内管30的外周壁与滤材安装腔210的内周壁抵接。其中，滤材安装腔210上部的内直径在从上到下的方向上保持不变或逐渐减小，内管30在内部的水压对内管30施加一个向下的力，防止内管30从滤材安装腔210脱离，而且，滤材安装腔210上部的内直径在从上到下的方向上逐渐减小，内管30向下移动时，内管30的外周壁与第一过滤组20的内周壁之间的密封作用也会逐渐增大，复合滤芯100的密闭性也会这件增大。
如图2-图4所示，滤材安装腔210在内管30轴向方向上的长度大于内管30的长度，也就是说，当内管30的上沿抵接在滤材安装腔210的上沿时，内管30的底部和滤材安 装腔210的底部之间仍有一定的距离，由此可以为水压向下挤压内管30提供了移动空间，防止内管30的下端无法向下移动导致内管30的上沿与滤材安装腔210的上沿之间密封不严。而且，内管30下端的空间可以用来容纳第一过滤组20净化后的水，提升了复合滤芯100的性能。
在一些实施例中，内管30上端沿的外直径等于滤材安装腔210的上端沿的内直径，内管30容纳在滤材安装腔210内时，当内管30的上沿与滤材安装腔210的上沿平齐时，内管30的外周壁的上沿与滤材安装腔210的内周壁的上沿之间密封抵接。防止内管30在滤材安装腔210内持续向下滑动，提升了复合滤芯100的稳定性。
如图8和图27所示，在一些实施例中，内管30的外周壁与中心管21的内壁之间设有密封圈301，密封圈301套设在内管30上，通过在内管30与中心管21之间设置密封圈301，可以提升内管30与中心管21之间的密闭性，防止高压水流泄漏。
进一步地，内管30的外周壁的上部形成有密封圈安装槽，密封圈安装槽沿内管30的径向向内凹陷，并沿内管30的周向延伸，密封圈301容的径向内侧容纳在密封圈安装槽内，密封圈301的宽度大于密封圈安装槽的深度，也就是说，密封圈301的外圈的半径减去内圈的半径大于密封圈安装槽的深度。密封圈301安装在密封圈安装槽内时，密封圈301的外周沿凸出于内管30的外周壁，密封圈301的外周沿与中心管21的内周壁配合，密封内管30上沿与中心管21上沿之间的间隙。
通过设置密封圈安装槽，不仅可以提升密封圈301的密封性能，还可以提升密封圈301装配在内管30上的稳定性，防止密封圈301在水压的作用下沿内管30的轴向滑动。密封圈301装配在内管30上时，密封圈301的外直径是大于滤材安装腔210开口直径的，通过设置密封圈安装槽可以为密封圈301的装配提供方便。
根据本申请的一些实施例，第一过滤组20为RO滤芯(即反渗透膜滤芯)，第二过滤组40为PAC滤芯。可选地，PAC滤芯的壁厚大于10mm。由此，上述组合的第一过滤组20和第二过滤组40，在满足复合滤芯100过滤要求的情况下，占用空间最小，可以最大程度的提升壳体10内部空间的利用效率，有利于缩小复合滤芯100的体积，为用户使用提供了方便。
如图1所示，根据本申请一些实施例的复合滤芯100，壳体10上设有第一进水口111、第一出水口112、第二进水口113和第二出水口114，其中，第一进水口111和第一出水口112连通滤材安装腔210。
第一过滤组20的外壁与壳体10的内壁限定出连通第二进水口113的第一净水腔51，第一过滤组20的内壁与内管30的外壁限定出连通第二出水口114的纯水腔52，内管30的内壁与第二过滤组40的外壁限定出连通第一进水口111的自来水腔53，第 二过滤组40内限定有连通第一出水口112的第二净水腔54。
水流经过第一进水口111进入自来水腔53，自来水腔53内的水流经过第二过滤组40的过滤作用进入第二净水腔54并通过第一出水口112流出，流出的净水经过增压泵的作用通过第二进水口113进入第一净水腔51，第一净水腔51内的水流经过第一过滤组20的过滤作用进入纯水腔52，纯水腔52中的水流经第二出水口114流出供用户饮用。
复合滤芯100的第一进水口111连通用户家的自来水管，自来水管内的水流经过第一进水口111进入自来水腔53，也就是说，自来水腔53的水压等于用户家的自来水压。第二出水口114连通大气供用户取水，也就是说纯水腔52内的水压等于大气压。一般而言，自来水的水压远大于大气压，因此，内管30在自来水压的作用下朝向壳体10的内壁移动，不会脱离壳体10。
第一过滤组20的外侧设置第一净水腔51，水流加压后进入第一净水腔51然后经过第一过滤组20的过滤作用从第二出水口114流出，也就是说，第一过滤组20过滤时，水流从外向内渗透，例如当第一过滤组20为RO滤芯时，增压泵对水流进行增压然后从第一过滤组20的外部向内渗透，由此可以防止高压水流进入内管30的外侧，影响内管30的内外水压差，进而防止水压变化影响内管30的稳定性。
在第一过滤组20的内部限定出第二净水腔54，自来水腔53中的高压水流渗透穿过第一过滤组20后通过第二净水腔54流出，同样可以防止自来水腔53内的高压水流泄漏影响内管30内外两侧的压力平衡。
在一些实施例中，如图8所示，内管30包括：内围板31和内下盖32，内围板31形成为沿壳体10的轴向延伸的管状，内围板31的上端敞开，内围板31的上端沿与壳体10的内壁密封相连，且内围板31的上端敞开，第二过滤组40设在内围板31内，并沿内围板31的轴向延伸，且第二过滤组40的长度小于等于内围板31的长度。内下盖32连接在内围板31的下端并封闭内围板31的下端。
高压自来水作用在围板的内围板31和内下盖32的上表面，为内管30提供一个向下的作用力，在复合滤芯100的使用过程中，内管30的密封效果逐渐增强，不仅可以防止内管30脱离壳体10，而且可以提升复合滤芯100的密封效果。
在一些实施例中，壳体10的内壁与第一过滤组20的外壁之间的间隙为1.2mm，第一过滤组20的内壁与内管30的外壁之间的间隙为1.2mm，内管30的内壁与第二过滤组40的外壁之间的间隙为1.2mm。由此不仅可以保证水流的正常通过，而且可以缩小第一过滤组20和壳体10的体积，提升空间利用效率。
而且，利用壳体10内壁、第一过滤组20的内壁、第一过滤组20的外壁、内管30 的内壁、内管30的外壁和第二过滤组40的外壁配合限定出第一净水腔51、第二净水腔54、自来水腔53和纯水腔52，结构简单，容易实现，有利于简化复合滤芯100的结构设计，而且可以降低复合滤芯100的生产成本。
如图3和图4所示，在一些实施例中，第一过滤组20包括：中心管21、RO滤膜22和环形内盖23，中心管21沿壳体10的轴向延伸，中心管21的上端敞开限定出滤材安装腔210，内管30设在中心管21内，纯水腔52限定在中心管21的内壁与内管30的外壁之间，RO滤膜22为反渗透滤膜，RO滤膜22套设在中心管21上并沿中心管21的轴向延伸。环形内盖23套设在中心管21上，且环形内盖23的内周沿与内管30的上沿密封抵接，环形内盖23的下表面与RO滤膜22的上端面密封配合。
进一步地，如图9-11所示，环形内盖23上设有废水口232，环形内盖23内限定有下表面敞开的废水槽，废水槽沿环形内盖23的周向延伸，RO滤膜22的上端面与环形内盖23配合封闭废水槽形成废水腔231，环形内盖23内限定有连通废水腔231与第三出水口115的废水通道。
RO滤芯在过滤过程中分离出废水，通过设置废水口232、废水腔231和废水通道可以引导废水排出。将废水腔231限定在环形内盖23上，可以防止废水串入第一净水腔51、纯水腔52、自来水腔53和第二净水腔54，进而可以提升过滤出的水流质量。而且RO滤芯的废水从RO滤芯的端部排出，将废水腔231限定在环形内盖23上，可以为废水进入废水腔231提供方便，而且结构简单，消除了RO滤芯与废水腔231之间的导流通道1431，简化了复合滤芯100的结构设计和水路设计。
其中，壳体10的顶部设有连通废水口232的第三出水口115，废水腔231中的废水通过第三出水口115排出，第三出水口115上设有废水塞14，废水塞14与壳体10相连，当废水腔231内的废水达到一定的压力时，废水塞14打开，废水排出。
如图3和4所示，在一些实施例中，第二过滤组40为PAC滤芯，第二过滤组40包括：PAC骨架41和PAC滤膜42，PAC骨架41位于内管30内并沿内管30的轴向延伸，PAC滤膜42套设在PAC骨架41上并沿PAC骨架41的轴向延伸。PAC滤膜42套设在PAC骨架41上并沿PAC骨架41的轴向延伸，环形上端盖43套设在出水管60上，环形上端盖43的下表面密封抵接PAC滤膜42的上端面，防止水流穿过PAC滤膜42后从PAC滤膜42的上端面流出。
可选地，PAC滤膜42为聚合氯化铝材料制作而成的管状过滤件，且PAC滤膜42的厚度大于10mm。
在本申请一些示例中，PAC滤膜42为由无纺布、聚丙烯层、碳纤维卷制而成的卷筒，使用寿命较长。当用于自来水的过滤时，可初步去除泥沙、铁锈及余氯。当然，第 二过滤组40也可以仅由其中一种或两种材料的滤层卷制而成，这里不做具体限制。
PAC滤膜42的过滤效果与PAC滤膜42的壁厚有关，PAC滤膜42的壁越厚过滤效果越好，当PAC滤膜42的壁厚大于10mm时，可以满足用户对水流的过滤要求。反渗透滤芯的过滤效果与绕设的滤膜的面积有关。因此，在反渗透滤芯内限定出滤材安装腔210，将PAC滤膜42设在反渗透滤芯内，在保证PAC滤膜42过滤效果的同时可以缩小PAC滤膜42的体积，进而可以减小PAC滤膜42的占用空间，而且可以减少PAC滤膜42的生产材料，进而可以节省成本，而将反渗透滤芯设在PAC滤膜42的外部，反渗透滤芯的直径较大，在绕设相同面积滤膜的情况下，可以降低反渗透滤芯的壁厚，同样可以降低反渗透滤芯的占用空间。
由此，上述组合的第一过滤组20和第二过滤组40，在满足复合滤芯100过滤要求的情况下，占用空间小，可以最大程度的提升壳体10内部空间的利用效率，有利于缩小复合滤芯100的总体体积，为用户使用提供了方便。
其中，PAC骨架41内限定出第二净水腔54，PAC滤膜42外壁与内管30的内壁限定出自来水腔53，自来水通过第一进水口111进入自来水腔53，水流穿过PAC滤膜42并经过PAC滤膜42的过滤作用从PAC骨架41的内壁流出进入第二净水腔54，然后从第一出水口112流出。
由于PAC滤膜42的过滤效果与水流穿过PAC滤膜42的厚度有关，因此将PAC滤膜42和PAC骨架41组成第二过滤组40并设在内管30内，缩小了第二过滤组40的直径，进而可以减小第二过滤组40的占用空间，而且可以减小PAC滤膜42的体积和生产材料，有利于降低成本。
进一步地，PAC骨架41为管状，PAC骨架41的壁上形成有若干沿PAC骨架41的壁的厚度方向贯穿PAC骨架41的壁的孔。通过在PAC骨架41的壁上设置孔，可以促进PAC滤膜42内的水流穿过孔进入第二净水腔54。
如图3和8所示，在一些实施例中，第二过滤组40还包括：PAC上端盖43和PAC下端盖44，PAC上端盖43套设在PAC骨架41的上端，PAC上端盖43的下表面密封抵接PAC滤膜42的上端面，PAC下端盖44套设在PAC骨架41的下端，PAC下端盖44的上表面密封抵接PAC滤膜42的下端面。
通过设置PAC上端盖43和PAC下端盖44，可以提升PAC滤膜42上端和下端的密闭性，防止PAC滤膜42内的水流从PAC滤膜42的上端或下端流出，不仅可以防止水流进入出水腔521，而且可以提升自来水腔53的密闭性。
如图8所示，在一些实施例中，PAC上端盖43的外周沿形成有向下翻折的上翻边431，上翻边431的内壁止抵PAC滤膜42的外周壁，上翻边431的外壁与内管30的内 壁限定有自来水通道，水流从第一进水口111经过自来水通道进入自来水腔53。
PAC下端盖44的外周沿形成有向上翻折的下翻边441，下翻边441的内壁止抵PAC滤膜42的外周壁。由此可以提升第二滤芯组件40的性能，而且可以提升自来水腔53的密闭性和可靠性，防止水流泄漏。
如图4、图5、图8所示，当出水管60的外周壁上设有PAC下端盖44，第二过滤组40胶粘在PAC下端盖44上，胶粘后的PAC下端盖44和第二过滤组40之间形成较好的密封，使得第二过滤组40两侧不同水质的水流不易在底部发生串流。
另外，如图28所示，挡胶环442外套在出水管60上，挡胶环442的外周沿挡在PAC下端盖44的周向外侧。本申请具有上述挡胶环442和PAC下端盖44结构的出水管60，可使得出水管60自身在制造时，与挡胶环442分离，不影响出水管60进行对半开模，大规模制造，制造完成方便组装成整根出水管60，再与挡胶环442装配在一起，加工制造的效率大幅度提高。挡胶环442还可以使PAC下端盖44和第二过滤组40在胶粘时，减小从两者之间的缝隙溢出的胶，防止溢出的胶影响过滤效果。
如图3-图8所示，第二过滤组40环绕出水管60设置，PAC下端盖44形成为环形板且连接在第二过滤组40的端面上，挡胶环442包括：连接环和密封环，密封环形成为筒形且套在第二过滤组40和PAC下端盖44的外侧，连接环从密封环的远离第二过滤组40的一端边沿沿径向向内延伸。
连接环可进一步封闭第二过滤组40和PAC下端盖44之间密封时向周向溢胶。密封环则可以增加连接环与PAC下端盖44的接触，防止胶从连接环和PAC下端盖44连接处的缝隙溢出。密封环的下周沿连接连接环的外周沿，密封环的内周壁密封抵接PAC滤膜42的外周壁，挡胶环442的断面形成为L形。
可选地，如图28所示，PAC下端盖44上设有卡凸440，挡胶环442上设有与卡凸440配合的卡孔(图未示出)。卡凸440和卡孔配合，可使挡胶环442在套在出水管60的基础上，进一步卡在PAC下端盖44上，使挡胶环442便于装配在出水管60上，且增加了连接的可靠性和装配的简易性。同时拆件后，挡胶环442还可以作为一个独立的部件使用，如此既不会影响第二过滤组40的打胶效果，也不会影响第二过滤组40的过滤效果，又大幅度提高了可制造性。
可选地，挡胶环442对应每个卡孔处向外凸出形成凸起443，这样可方便挡胶环442与外部部件接触定位。
有利地，如图5所示，出水管60为一体注塑成型件，且出水管60上一体注塑出PAC下端盖44。PAC下端盖44与出水管60一体注塑成型，方便使用模具制造，且PAC下端盖44具有足够的承载能力，不易从出水管60上分离脱落。防止因长时间使用的过程 中发生歪斜。
根据本申请的一些实施例，如图2和图3所示，复合滤芯100还包括：第三过滤组50，第三过滤组50设在纯水腔52内，第三过滤组50将纯水腔52分割成位于第三过滤组50外的原纯水腔522和位于第三过滤组50内的出水腔521，出水腔521连通第二出水口114。
也就是说，经过第一过滤组20过滤后的纯水进入原纯水腔522，原纯水腔522内的水流穿过第三过滤组50，经过第三过滤组50的过滤作用进入出水腔521，由此可以进一步清除水中的杂质或异味。其中，第一过滤组20为RO滤芯，经过RO滤芯过滤后的水成弱酸性，且味道较差，不适宜用户直接饮用，经过活心碳滤芯的过滤作用，可以进一步提升纯水的质量，提升了饮用水的口感。
而且，将第三过滤组50设在纯水腔52内，可以进一步提升复合滤芯100的复合程度，提升了复合滤芯100对水流的过滤作用，而且相对于单独设置第三过滤组50而言，不仅可以简化复合滤芯100的水流设计，还能减小复合滤芯100的体积。
如图8所示，根据本申请的一些实施例，第三过滤组50与内管30沿第一过滤组20的轴向排列，也就是说，第一过滤组20内限定有沿第一过滤组20的轴向延伸的滤材安装腔210。
可选地，内管30的轴向长度与第三过滤组50的轴向长度之和小于等于滤材安装腔210的轴向长度，第三过滤组50设在滤材安装腔210的底部，内管30设在第三过滤组50的顶部。
沿第一过滤组20的轴向排列的第三过滤组50与内管30，可以充分利用滤材安装腔210的空间，有利于缩小滤材安装腔210的内径，进而可以缩小第一过滤组20的直径和体积，而且上述结构的第三过滤组50与内管30结构简单，装配方便。
如图3和8所示，根据本申请的一些实施例，复合滤芯100还包括出水管60，出水管60沿内管30的轴向贯穿内管30，出水管60插接在PAC骨架41内，出水管60的一端(如图8所示的下端)连通出水腔521，出水管60的另一端(如图8所示的上端)连通第二出水口114，PAC骨架41的内壁与出水管60的外壁之间限定出第二净水腔54。
在一些实施例中，第二出水口114位于内管30的上方，出水腔521位于第三过滤组50内且位于内管30的下方，通过设置出水管60，可以为出水腔521内的水流从第二出水口114流出提供方便，而且出水管60的结构简单，容易实现。
在一些实施例中，如图12和图13所示，中心管21包括：围板211和下盖板212， 围板211形成为两端敞开的筒状，RO滤膜22套设在围板211，下盖板212设在围板211内且位于围板211的下部，下盖板212封闭围板211的下端敞口并与围板211配合限定出滤材安装腔210，第三过滤组50的下端止抵在下盖板212的上表面。也就是说，中心管21形成为上端敞开下端封闭的筒状，围板211的内壁、下盖板212的上表面与内管30的外表面配合限定出纯水腔52。
中心管21的壁上形成有纯水通孔2111，纯水通孔2111沿中心管21的壁的厚度方向贯穿中心管21的壁，水流从RO滤膜22的下端进入RO滤膜22，RO滤膜22将水流过滤分成废水和纯水，废水从RO滤膜22的上端流出并通过废水腔231和第三出水口115排出。纯水从RO滤膜22的内壁流出并通过纯水通孔2111进入纯水腔52，并通过第二出水口114排出供用户饮用。
如图12所示，围板211的外周壁上形成有连通纯水通孔2111的导水槽2112，导水槽2112相对于围板211的外周壁向内凹陷，RO滤膜22过滤后的水流通过导水槽2112流入纯水通孔2111，进而汇集在滤材安装腔210内，然后导出。
由于RO滤膜22绕设在围板211上，通过在围板211上设置导水槽2112，可以增加RO滤膜22中导出水流的流动效率，增加RO滤膜22的出水效率，进而可以提升RO滤芯组件的净水效率。
如图12所示，导水槽2112沿围板211的周向延伸，也就是说导水槽2112形成为沿围板211周向延伸的环形，纯水通孔2111设在导水槽2112内，由此可以进一步增加导水槽2112的长度，进一步提升了RO滤膜22的出水效率，而且可以保证RO滤膜22在周向上出水效率均匀，防止局部出水受阻影响RO滤膜22的净水效率。
上述结构的中心管21，下端封闭，可以防止纯水水流从纯水腔52的下端泄漏，RO滤芯装配过程中，只需要注意中心管21上端的密闭性即可。
如图13和图14所示，在一些实施例中，滤材安装腔210内设有沿第三过滤组50的轴向延伸的支撑台213，支撑台213抵接在内管30的下端与滤材安装腔210的底壁之间，也就是说，可在第三过滤组50的外侧设有支撑台213，利用支撑台213支撑内管30，通过设置支撑台213，利用支撑台213限定内管30向下滑动的距离，防止内管30持续向下滑动，而且可以防止因内管30内水压过大造成第三过滤组50的损坏。
其中，支撑台213为多个，多个支撑台213沿第三过滤组50的周向间隔开设置，通过设置多个支撑台213，可以提升支撑台213的支撑强度，而且可以促进内管30受力均匀。降低内管30对第三过滤组50的挤压作用，防止内管30压力过大对第三过滤组50造成损坏，有利于延长第三过滤组50的使用寿命。再者，间隔开设置的支撑台 213可以促进水流穿过第三过滤组50，水流从相邻支撑台213之间穿过，然后穿过第三过滤组50进入出水腔521。
进一步地，支撑台213沿围板211的周向延伸，也就是说，支撑台213形成为沿围板211的周向延伸的环形，支撑台213也可以沿围板211的轴向延伸形成为管状，支撑台213的下端止抵中心管21的下盖板212的上表面，第三过滤组50设在支撑台213内。
管状支撑台213可以提升内管30的受力均匀性，防止内管30局部受力不均匀损坏或倾斜。其中，支撑台213、围板211与下盖板212一体成型，也就是说中心管21是一体成型件，一体成型的中心管21可以提升支撑台213、围板211与下盖板212之间的连接稳定性和连接强度，进而可以提升中心管21的功能稳定性和可靠性，而且可以消除支撑台213、围板211与下盖板212之间的连接机构，提升了中心管21和复合滤芯100的装配效率，而且一体成型的中心管21的强度大，使用寿命较长。
如图6所示，根据本申请的一些实施例，壳体10包括：筒体11和下盖12，筒体11的底部敞开，第一过滤组20设在筒体11内，下盖12封闭筒体11的下端。
具体地，第一进水口111、第一出水口112、第二进水口113和第二出水口114均设在筒体11的顶部，下盖12与筒体11相连以封闭筒体11的敞开口，且下盖12的上表面与第一过滤组20的下端面密封抵接。
其中，如图1所示，壳体10上还设有四个转接头13，四个转接头13一一对应地插接在第一进水口111、第一出水口112、第二进水口113和第二出水口114内，通过设置转接头13为复合滤芯100装配水路提供了方便，而且提升了水路的密闭性。
第三出水口115处设有废水塞14，废水塞114插接在第三出水口115内，废水塞14对废水腔231内的水产生一定的阻力，当废水腔231内的水压达到预定压力值时，废水塞14导通，废水从废水腔231排出。
在本实施例中，如图15(a)和图15(b)所示，废水塞14包括：套管140和多个毛细管143，套管140插接在废水出口115内并与壳体10相连，毛细管143设在套管140的内壁上并沿套管140的径向向内延伸。
毛细管143的数量较多，多个毛细管143沿套管140的周向排列形成毛细管143组，多个毛细管143组沿套管140的轴向充满在套管140内。上述结构的废水塞14，结构简单，容易制作，而且可以有效提升RO滤芯组件20的净水效果。
如图15(a)所示，在本实施例中，套管140包括：插接段141和导向段142，插接段141的一端插接在废水出口115内，插接段141沿废水出口115的轴向延伸，导向段142连通插接段141的另一端。插接段141和导向段142内均设有毛细管143，也可 以仅在插接段141和导向段142中的一个内设置毛细管143。
上述结构的套管140不仅可以增加废水出口115的水压，而且插接段141插接在废水出口115内，稳定性和密闭性较好，导向段142适于连通废水出口115与废水排水管，其中，导向段142垂直于插接段141，方便废水排水管连接导向段142，可以为废水排放提供方便。
如图15(a)和图15(b)所示，根据本发明的一个实施例，毛细管143设在插接段141内，毛细管143的径向内端配合限定出导流通道1431，导流通道1431的直径较小，水流穿过导流通道1431时，水流阻力较大，导向段142内设有沿导向段142的轴向延伸的导水柱1421，导水柱1421封闭导流通道1431，利用导水柱1421封闭导流通道1431，水流穿过毛细管143从插接段141进入导向段142，由此可以满足废水塞14对废水腔231的增压作用。
其中，壳体10上还设有装饰盖15，装饰盖15罩设在筒体11的顶部，第一进水口111、第一出水口112、第二进水口113、第二出水口114和第三出水口115均罩设在装饰盖15内，由此提升了复合滤芯100的外观整齐性。
如图1所示，在一些实施例中，筒体11的顶部还设有提手16，筒体11的侧壁上设有间隔开布置的第一连接点和第二连接点，提手16的一端连接第一连接点，另一端连接第二连接点，在拆除或装配复合滤芯100时，用户通过提升16取放复合滤芯100，操作方便，稳定性强，而且提手16结构简单，容易实现。
如图16-图26所示，壳体10上设有固定结构17，提手16上设有配合结构161，配合结构161可与固定结构17转动配合。通过配合结构161和固定结构17的相互配合，使提手16可以转动地连接在壳体10上，方便取、放复合滤芯组件100时，直接拎取提手16，而无需握持壳体10。
配合结构161相对固定结构17在转动方向上具有第一位置和第二位置，在第一位置时配合结构161可抽插连接在固定结构17上，在第二位置时配合结构161与固定结构17卡合形成防脱结构。
提手16上的配合结构161可在固定结构17中转动并在第一位置和第二位置变换，在第一位置时配合结构161和固定结构17方便连接，只需将配合结构161抽插连接在固定结构17中，因此提手16容易安装在壳体10上。
在第二位置时配合结构161和固定结构17相互卡合，使得配合结构161与固定结构17之间形成较为牢固的连接，可防脱，从而便于提起，防止在拎起提手16的过程中提手16与壳体10之间分离。
本申请具有上述提手16结构的复合滤芯组件100，相比于现有技术中的无提手的滤 芯组件，或只能固定连接提手16的滤芯组件100，其兼具安装的便利性，以及安装后使用过程中的承力性能。
具有以上连接配合结构的提手16，在第一位置时，如图16和图17所示，当轴套16111正对导向柱1711时，限位柱1712正对着导向槽16112。导向柱1711插入轴套16111，同时限位柱1712插入导向槽16112。即在第一位置时，导向柱1711和限位柱1712同时从轴套16111和导向槽16112中无阻隔地插入，导向柱1711和限位柱1712也能无阻隔地从轴套16111和导向槽16112中拔出，便于提手16安装在壳体10上。
在第二位置时，如图18和图19所示，限位柱1712卡接在卡孔16113中。即限位柱1712从第一位置转动进入第二位置时，限位柱1712由导向槽16112插到卡孔16113中，卡孔16113使限位柱1712无法沿轴向移动。
为了方便描述，下文中，将与第一插接结构1611配合的固定结构17记为第一固定结构171，将于第二插接结构1612配合的固定结构17记为第二固定结构172。
此外，限定有“第一”、“第二”、“第三”的特征可以明示或者隐含地包括一个或者更多个该特征，用于区别描述特征，无顺序之分，无轻重之分。
可选地，导向槽16112沿轴套16111的轴向延伸。此时，在将轴套16111插上导向柱1711时，沿轴向移动轴套16111，就能将卡孔16113移到限位柱1712处，之后旋转提手16，就能使限位柱1712卡在卡孔16113内。
在其他一些实施例中，导向槽16112在从端部到卡孔16113的方向上螺旋延伸，即导向槽16112是螺旋延伸槽。在将轴套16111插上导向柱1711时，一边沿轴向移动轴套16111一边还要转动轴套16111(类似于拧螺丝的动作)，才能将卡孔16113移动限位柱1712处，之后旋转提手16，就能使限位柱1712卡在卡孔16113内。
可选地，导向槽16112和卡孔16113均在轴套16111的厚度方向上贯通轴套16111。这样在轴套16111上加工导向槽16112和卡孔16113，也非常方便。当然本申请不限于此，例如也可以将导向槽16112和卡孔16113设置在轴套16111的内壁上，也能实现上述功能。
在本申请的另一些实施例中，如图21-图26所示，配合结构161为第二插接结构1612，第二插接结构1612包括插柱16121，插柱16121的端部设有卡块16123，如图26所示，卡块16123的设置使插柱16121的端部轮廓为非圆形。
相对的，固定结构17内限定出凹槽1721，凹槽1721的端部具有缩口1722，缩口1722形成为与插柱16121的端部相适配的非圆形。这里说的缩口1722形成为与插柱16121的端部相适配的非圆形，指的是当提手16在第一位置时，插柱16121的端部形状与缩口1722的形状相一致，当然缩口1722要比插柱16121的端部略大。而凹槽1721 的内部形状不限，只要在插柱16121插入凹槽1721后插柱16121可转动到第二位置即可，即在第二位置时凹槽1721内部不能与卡块16123产生干涉。
在第一位置时，插柱16121可通过缩口1722插入凹槽1721内，在第二位置时卡块16123卡在缩口1722的内侧。
可选地，如图22、图24、图25所示，插柱16121上设有同轴设置的插孔16122，凹槽1721内设有连接柱1724，连接柱1724插在插孔16122内。连接柱1724与插孔16122相互配合，一方面在第一位置时，提手16安装在壳体10上，可起到一定的导向作用，另一方面为提手16从第一位置转动到第二位置时，提供一个转动轴。另外，提手16转动后在第二位置时，连接柱1724可以作为承力杆，起到一定的支撑作用。
可选地，如图22、图24、图26所示，插柱16121的端部外轮廓形状是一半为半圆形、另一半为半椭圆形，凹槽1721的缩口1722的形状是一半为半圆形、另一半为半椭圆形。如此设置，一方面两者之间形成契合，容易识别和装配提手16；另一方面，插柱16121半椭圆形的一端带有卡块16123的部分，轮廓圆滑不易卡滞，更有利于形成稳定地支撑作用，使提手16不易从壳体10的外部脱出。
复合滤芯100在装配过程中，先将RO滤膜22绕设在中心管21上，然后将第三过滤组50设在滤材安装腔210内，然后将内管30装配在滤材安装腔210内，内管30的下端止抵第三过滤组50，然后将出水管60插接在内管30内，之后将第二过滤组40套设在出水管60上，最后将环形内盖23罩设在中心管21上，出水管60和PAC上端盖43从环形内盖23的中部伸出。然后将第一过滤组20插接在筒体11内，筒体11内腔的顶壁上设有第一水道、第二水道、第三水道、第四水道和第五水道，第一水道连通第二出水口114和出水管60，第二水道的一端连通第一进水口111，另一端连通PAC上端盖43的外周壁与环形内盖23内周壁之间的通道；第三水道的一端连通第一出水口112，另一端连通PAC上端盖43的内周壁与出水管60的外周壁之间的通道，第四水道的一端连通第二进水口113，另一端连通RO滤膜22的外周壁与筒体11内周壁之间的通道，第五水道连通第三出水口115和废水口232。
在一些实施例中，第一过滤组20的中心轴线、第二过滤组40的中心轴线、内管30的中心轴线、出水管60的中心轴线与壳体10的中心轴线重合。也就是说，出水管60，第二过滤组40、内管30、第一过滤组20和壳体10依次嵌套设置，由此可以减小出水管60、第二过滤组40、内管30和第一过滤组20的占用空间，提升了复合滤芯100内部空间的利用效率，进而可以缩小壳体10的体积，为复合滤芯100的使用和装配提供了方便。
为更好理解本申请实施例的方案，下面结合图1-图15描述本申请的一个具体实施 例中的复合滤芯100的结构。
下述具体实施例以净化自来水为例来讲述复合滤芯100的三级过滤功能，并说明复合滤芯100的高度集成化一体设计结构，以及复合滤芯100便于取放的提手16。另外，第二过滤组40以无纺布、聚丙烯层、碳纤维和PAC滑架41卷制而成的卷筒型的初级过滤件为例进行说明；第一过滤组20以反渗透滤芯作为中间过滤为例进行说明。第三过滤组50以圆筒形的中空碳棒作为终级过滤为例进行说明。
如图1-图15所示，一种复合滤芯100，整个复合滤芯1000常态下呈竖直状态装设。复合滤芯100包括：壳体10、第一过滤组20、内管30、第二过滤组40、第三过滤组50、出水管60、挡胶环442。壳体10内限定有过滤腔，第一过滤组20设在过滤腔内，且第一过滤组20内限定有一侧敞开的滤材安装腔210，内管30可拆卸地设在滤材安装腔210内，第二过滤组40设在内管30内。第一过滤组20的外壁与壳体10的内壁限定出连通第二进水口113的第一净水腔51，第一过滤组20的内壁与内管30的外壁限定出连通第二出水口114的纯水腔52，内管30的内壁与第二过滤组40的外壁限定出连通第一进水口111的自来水腔53，第二过滤组40内限定有连通第一出水口112的第二净水腔54。壳体10的上部还设有连通第一过滤组20的废水口232。
具体地，内管30、第三过滤组50沿轴向前、后布置在滤材安装腔210中，第一过滤组20内的中心管21内部形成纯水腔52，第三过滤组50将纯水腔52分为外部的原纯水腔522，以及内部的出水腔521。壳体10的上部靠近装饰盖15处的两端分别设有一个连接点与提手16相连。出水管60的一端连通第二出水口114，出水管60的另一端沿内管30的轴向贯穿内管30后，伸出内管30并伸到第三过滤组40的PAC滑架41中，连通出水腔521。
如图5所示，第二过滤组40环绕出水管60设置，PAC下端盖44与出水管60一体注塑成型，且PAC下端盖44形成为环形板且连接在第二过滤组40的端面上。挡胶环442包括：连接环和密封环，密封环形成为筒形且套在第二过滤组40和PAC下端盖44的外侧，连接环从密封环的远离第二过滤组40的一端边沿沿径向向内延伸。PAC下端盖44上设有多个卡凸440，挡胶环442上设有与卡凸440配合的卡孔，当挡胶环442套在出水管60上后，卡凸440和卡孔相互卡接配合。
整个自来水的过滤过程为，自来水从第一进水口111进入自来水腔53，并向径向内侧流动，经过第二过滤组40的过滤作用进入第二净水腔54并通过第一出水口112流出。流出的净水经过增压泵的作用通过第二进水口113进入第一净水腔51，第一净水腔51内的水流经过第一过滤组20的过滤作用进入原纯水腔522，原纯水腔522中的水流经第三过滤组50过滤后进入出水腔521，再从出水管60向上导流从第二出水口114流出 供用户饮用。
另外，本申请的挡胶环442与PAC下端盖44的配合结构也可以用在其他种类的滤芯组件需要挡胶的部位，不局限于本申请提到的复合滤芯100的出水管60上的挡胶板44与第二过滤组40之间的粘胶时的挡胶。
根据本申请第二方面实施例的水处理装置，包括上述实施例中描述的复合滤芯100，通过采用上述实施例中的复合滤芯100，可以缩小水处理装置的体积，节省占用空间，而且可以提升水处理装置的稳定性，防止水流泄漏。
在一些水处理装置中，还包括增压泵和箱体，箱体上设有供水装置、出水口和排水口，复合滤芯100和增压泵设在箱体内，供水装置连通第一进水口111为水处理装置供水，增压泵连通在第一出水口112和第二进水口113之间，用于将第二净水腔54流出的水增压后泵送至第一净水腔51内，出水口连通第二出水口114供用户取水，排水口连通第三出水口115用于排放废水。
根据本申请第二方面的水处理装置，包括上述实施例中描述的复合滤芯100，通过采用上述实施例中的复合滤芯100，可以缩小水处理装置的体积，节省占用空间，而且可以提升出水质量，为用户使用提供了方便。
根据本申请实施例的水处理装置的其他构成以及操作对于本领域普通技术人员而言都是已知的，这里不再详细描述。
在本说明书的描述中，参考术语“一些实施例”、“一些实施例”、“示意性实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一些实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
尽管已经示出和描述了本申请的实施例，本领域的普通技术人员可以理解：在不脱离本申请的原理和宗旨的情况下可以对这些实施例进行多种变化、修改、替换和变型，本申请的范围由权利要求及其等同物限定。

Claims (29)

  1. 一种复合滤芯，其特征在于，包括：
    壳体；
    第一过滤组，所述第一过滤组设在所述壳体内，且所述第一过滤组内限定有滤材安装腔；
    内管，所述内管设在所述滤材安装腔内；
    第二过滤组，所述第二过滤组设在所述内管内。
  2. 根据权利要求1所述的复合滤芯，其特征在于，所述内管可拆卸地设在所述滤材安装腔内。
  3. 根据权利要求1或2所述的复合滤芯，其特征在于，所述第一过滤组为RO滤芯，所述第二过滤组为PAC滤芯，所述PAC滤芯的壁厚大于10mm。
  4. 根据权利要求1-3中任一项所述的复合滤芯，其特征在于，所述壳体上设有第一进水口、第一出水口、第二进水口和第二出水口；
    所述第一过滤组的外壁与所述壳体的内壁限定出连通所述第二进水口的第一净水腔；
    所述第一过滤组的内壁与所述内管的外壁限定出连通所述第二出水口的纯水腔；
    所述内管的内壁与所述第二过滤组的外壁限定出连通所述第一进水口的自来水腔；
    所述第二过滤组内限定有连通所述第一出水口的第二净水腔。
  5. 根据权利要求4所述的复合滤芯，其特征在于，所述第一过滤组包括：
    中心管，所述滤材安装腔设在所述中心管内，所述中心管的壁上形成有纯水通孔；
    RO滤膜，所述RO滤膜套设在所述中心管上；
    环形内盖，所述环形内盖套设在所述中心管上，所述环形内盖的内周沿与所述内管的上端沿相连，且所述环形内盖的下端面与所述RO滤膜的上端面止抵。
  6. 根据权利要求5所述的复合滤芯，其特征在于，所述环形内盖内限定有向下敞开的废水槽，所述RO滤膜的上端面与所述环形内盖配合封闭所述废水槽形成废水腔，所述内盖顶部设有连通所述废水腔的废水口。
  7. 根据权利要求6所述的复合滤芯，其特征在于，所述壳体的顶部设有连通所述废水口的第三出水口。
  8. 根据权利要求4-7中任一项所述的复合滤芯，其特征在于，所述第二过滤组包括：
    PAC骨架，所述PAC骨架位于所述内管内并沿所述内管的轴向延伸，所述第二净水腔设在所述PAC骨架内；
    PAC滤膜，所述PAC滤膜套设在所述PAC骨架上并沿所述PAC骨架的轴向延伸，所述自来水腔限定在所述PAC滤膜的外周壁与所述内管的内周壁之间。
  9. 根据权利要求8所述的复合滤芯，其特征在于，所述PAC骨架为管状，所述PAC骨架的内腔连通所述第一出水口，所述PAC骨架的壁上形成有净水通孔。
  10. 根据权利要求8或9所述的复合滤芯，其特征在于，所述第二过滤组还包括：
    PAC上端盖，所述PAC上端盖套设在所述PAC骨架的上部，所述PAC上端盖的下表面密封抵接所述PAC滤膜的上端面，所述PAC上端盖上限定有连通所述自来水腔与所述第一进水口的第一通水孔和连通所述第二净水腔与所述第一出水口的第二通水孔；
    PAC下端盖，所述PAC下端盖套设在所述PAC骨架的下部，所述PAC下端盖的上表面密封抵接所述PAC滤膜的下端面。
  11. 根据权利要求10所述的复合滤芯，其特征在于，所述PAC上端盖的外周沿形成有向下翻折的上翻边，所述上翻边的内壁止抵所述PAC滤膜的外周壁；
    所述PAC下端盖的外周沿形成有向上翻折的下翻边，所述下翻边的内壁止抵所述PAC滤膜的外周壁。
  12. 根据权利要求4-11中任一项所述的复合滤芯，其特征在于，还包括：
    第三过滤组，所述第三过滤组设在所述纯水腔内，所述第三过滤组将所述纯水腔分割成位于所述第三过滤组外的原纯水腔和位于所述第三过滤组内的出水腔，所述出水腔连通所述第二出水口。
  13. 根据权利要求12所述的复合滤芯，其特征在于，所述第三过滤组与所述内管沿所述第一过滤组的轴向排列。
  14. 根据权利要求13所述的复合滤芯，其特征在于，还包括：
    出水管，所述出水管沿所述内管的轴向贯穿所述内管，所述出水管的一端连通所述出水腔，所述出水管的另一端连通所述第二出水口。
  15. 根据权利要求4-14中任一项所述的复合滤芯，其特征在于，所述壳体包括：
    筒体，所述筒体的底部敞开，所述第一过滤组设在所述筒体内，所述第一进水口、所述第一出水口、所述第二进水口和所述第二出水口均设在所述筒体的顶部；
    下盖，所述下盖与所述筒体相连以封闭所述筒体的敞开口，且所述下盖的上表面与所述第一过滤组的下端面密封抵接。
  16. 根据权利要求1-15中任一项所述的复合滤芯，其特征在于，所述第一过滤组的中心轴线、所述第二过滤组的中心轴线、所述内管的中心轴线与所述壳体的中心轴线重合。
  17. 根据权利要求1-16中任一项所述的复合滤芯，其特征在于，所述内管的一端敞开，所述内管的敞开端的外沿与所述滤材安装腔的内周壁密封抵接，所述内管内侧的水压大于所述内管外侧的水压。
  18. 根据权利要求17所述的复合滤芯，其特征在于，所述内管的顶部敞开，且所述滤材安装腔上部的内直径在从上到下的方向上保持不变或逐渐减小。
  19. 根据权利要求17或18所述的复合滤芯，其特征在于，所述滤材安装腔内所述内管轴向方向上的长度大于所述内管的长度。
  20. 根据权利要求17-19中任一项所述的复合滤芯，其特征在于，所述内管上端沿的外直径等于所述滤材安装腔的上端沿的内直径。
  21. 根据权利要求17-20中任一项所述的复合滤芯，其特征在于，所述内管的外周壁与所述中心管的内壁之间设有密封圈。
  22. 根据权利要求21所述的复合滤芯，其特征在于，所述内管的外周壁的上部形成有密封圈安装槽，所述密封圈安装槽沿所述内管的周向延伸。
  23. 根据权利要求12所述的复合滤芯，其特征在于，所述滤材安装腔内设有沿所述第三过滤组的轴向延伸的支撑台，所述支撑台抵接在所述内管的下端与所述滤材安装腔的底壁之间。
  24. 根据权利要求23所述的复合滤芯，其特征在于，所述支撑台为多个，多个所述支撑台沿所述第三过滤组的周向间隔开设置。
  25. 根据权利要求4所述的复合滤芯，其特征在于，还包括：
    出水管，所述出水管的一端连通所述第二出水口，所述出水管的另一端沿所述内管的轴向贯穿所述内管后，伸出所述内管并伸到所述滤材安装腔中，其中，所述出水管的外周壁上设有PAC下端盖，所述第二过滤组胶粘在所述PAC下端盖上；
    挡胶环，所述挡胶环外套在所述出水管上，所述挡胶环的外周沿挡在所述PAC下端盖的周向外侧。
  26. 根据权利要求25所述的复合滤芯，其特征在于，所述第二过滤组环绕所述出水管设置，所述PAC下端盖形成为环形板且连接在所述第二过滤组的端面上，
    所述挡胶环包括：连接环和密封环，所述密封环形成为筒形且套在所述第二过滤组和所述PAC下端盖的外侧，所述连接环从所述密封环的远离所述第二过滤组的一端边沿沿径向向内延伸。
  27. 根据权利要求25或26所述的复合滤芯，其特征在于，所述PAC下端盖上设有卡凸，所述挡胶环上设有与所述卡凸配合的卡孔。
  28. 根据权利要求25-27中任一项所述的复合滤芯，其特征在于，所述出水管为一 体注塑成型件，且所述出水管上一体注塑出所述PAC下端盖。
  29. 一种水处理装置，其特征在于，包括根据权利要求1-28中任一项所述的复合滤芯。
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