WO2021190002A1 - 反渗透膜元件、滤芯和净水器 - Google Patents

反渗透膜元件、滤芯和净水器 Download PDF

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Publication number
WO2021190002A1
WO2021190002A1 PCT/CN2020/138217 CN2020138217W WO2021190002A1 WO 2021190002 A1 WO2021190002 A1 WO 2021190002A1 CN 2020138217 W CN2020138217 W CN 2020138217W WO 2021190002 A1 WO2021190002 A1 WO 2021190002A1
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WO
WIPO (PCT)
Prior art keywords
membrane element
sealing
pure water
element body
wall
Prior art date
Application number
PCT/CN2020/138217
Other languages
English (en)
French (fr)
Inventor
桂鹏
李杨敏
郑跃东
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 CN202010210199.6A external-priority patent/CN113491950B/zh
Priority claimed from CN202020378777.2U external-priority patent/CN212309332U/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
Publication of WO2021190002A1 publication Critical patent/WO2021190002A1/zh

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    • 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
    • B01D61/06—Energy recovery
    • 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
    • B01D61/10—Accessories; Auxiliary operations
    • 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

Definitions

  • This application relates to the field of water purification equipment, in particular to a reverse osmosis membrane element, a filter element and a water purifier.
  • the pressure of the reverse osmosis membrane is greater due to the higher water pressure of the raw water.
  • the outer side of the reverse osmosis membrane is spaced apart from the shell where the reverse osmosis membrane is installed, which leads to an excessive volume of the entire filter element .
  • the main purpose of this application is to propose a reverse osmosis membrane element, which aims to reduce the volume of the reverse osmosis element.
  • the reverse osmosis membrane element proposed in this application includes:
  • the membrane element body is rolled into a cylindrical shape, the inner side of the membrane element body has a pure water outlet, and the end surface of the membrane element body has a raw water inlet and a waste water outlet; and,
  • the sealing layer covers the outer surface of the membrane element body and seals the outer surface of the membrane element body.
  • the sealing layer includes a sealing winding strip, and the sealing winding strip is wound on the outer side surface of the membrane element body.
  • the sealing winding strip is glass fiber; and/or,
  • one end of the membrane element body is provided with a first end cover, and the other end is provided with a second end cover.
  • the second end cover has a second sealing wall ringed on the outer side of the membrane element body;
  • the first sealing wall, the second sealing wall and the sealing winding strip jointly seal and wrap the outer side surface of the membrane element body.
  • the outer surface of the membrane element body is wound with multiple layers of the sealing winding strip
  • first sealing wall and the second sealing wall are both arranged between two adjacent layers of the sealing winding strips; alternatively, the first sealing wall and the second sealing wall are both arranged at all Between the sealing winding strip and the membrane element body.
  • the first sealing wall is provided with a first glue containing hole, and the sealing winding strip seals and wraps the first glue containing hole; and/or,
  • the second sealing wall is provided with a second glue containing hole, and the sealing winding strip is sealingly wound around the second glue containing hole.
  • the first end cover is further provided with a limiting ring groove, the limiting ring groove extends along the circumferential direction of the first sealing wall, and the sealing ring is wound around the limiting ring groove. Winding strips.
  • the sealing layer includes a sealing cylinder, and the sealing cylinder is sleeved on the outer surface of the membrane element body.
  • the two ends of the sealing cylinder are respectively spliced with the first sealing wall and the second sealing wall to jointly wrap the outer surface of the membrane element; and/or,
  • the sealing layer further includes a sealant layer arranged between the sealing cylinder and the outer side surface of the membrane element body.
  • one end of the membrane element body is provided with a second end cover, the second end cover has a third sealing wall, and the third sealing wall is sealed with the end surface of the membrane element body.
  • Glue sealing and bonding; and the third sealing wall is provided with a supporting rib, and the supporting rib abuts against the end surface of the membrane element body.
  • the raw water inlet and the waste water outlet are located on the same end surface of the membrane element body.
  • This application also proposes a filter element, including a housing and a reverse osmosis membrane element;
  • the housing has an installation cavity, a pure water storage cavity, a raw water inlet, a waste water outlet, and a pure water outlet.
  • the raw water inlet is in communication with the raw water inlet, and the waste water outlet is in communication with the wastewater outlet.
  • the pure water outlet is in communication with the pure water outlet, the pure water storage cavity is in communication with the pure water outlet; the reverse osmosis membrane element is located in the installation cavity.
  • the reverse osmosis membrane element has a first end surface and a second end surface opposite to each other, the pure water storage cavity includes an end storage cavity, and the end storage cavity is located between the second end surface and the second end surface. Between the walls of the shell.
  • the second end surface and the wall surface of the casing are arranged at intervals, and the interval constitutes the end storage cavity; or, the wall surface of the casing facing the second end surface is provided with a groove, The groove constitutes the end storage cavity.
  • the pure water storage cavity further includes an annular storage cavity, the annular storage cavity is in communication with the end storage cavity, and there is a gap between the outer side surface of the membrane element body and the wall surface of the housing An annular gap, which constitutes the annular storage cavity.
  • the filter element further includes a central tube, and the membrane element body is rolled around the central tube to form a cylindrical shape;
  • the peripheral wall of the central pipe is provided with a through hole to communicate with the pure water outlet, the two ends of the central pipe pass through, the pure water outlet is arranged close to the first end surface, and the central pipe is close to the first end.
  • One end of the end surface is in communication with the pure water outlet, and the end of the central pipe close to the second end surface is in communication with the pure water storage cavity; or,
  • the peripheral wall of the central pipe is provided with a through hole to communicate with the pure water outlet, the end of the central pipe close to the first end surface is closed, the end of the central pipe close to the second end surface is connected, and the pure water
  • the water outlet is arranged close to the first end surface, and the pure water storage cavity is in communication with the pure water outlet; or,
  • the application also proposes a water purifier, which includes a filter element.
  • the sealing layer in this application covers the outer side of the membrane element body, and the sealing layer is tightly attached to the outer side of the membrane element body, so that the size of the final product is smaller and the space for the entire device is reduced. Of occupation.
  • the high-strength protective layer formed by the sealing layer can effectively prevent the outer surface of the membrane element body from expanding.
  • Fig. 1 is a cut-away schematic diagram of the first embodiment of the filter element of the present application
  • Fig. 2 is a schematic diagram of the water circuit of the filter element in Fig. 1 after the pressure at the raw water end is disconnected;
  • Fig. 3 is a schematic cross-sectional view of a second embodiment of the filter element of the present application.
  • Fig. 4 is a cut-away schematic diagram of a third embodiment of a filter element according to the present application.
  • Fig. 5 is a cut-away schematic diagram of a fourth embodiment of the filter element of the present application.
  • Figure 6A is a front view of the first end cap in Figure 1;
  • Figure 6B is a bottom view of the first end cap in Figure 6A;
  • Figure 7C is a top view of the third end cap in Figure 7A;
  • Fig. 12A is a schematic structural diagram of the third end cover in Fig. 9;
  • Fig. 15 is an enlarged schematic view of A in Fig. 14.
  • a plurality of through holes 23 are provided on the peripheral wall of the central pipe 20 to communicate with the pure water outlet, wherein at least one end of the central pipe 20 is penetrated to discharge the pure water.
  • the membrane element body 10 is wound on the central tube 20, and the two are attached to each other.
  • the raw water enters the membrane element body 10 from the raw water inlet 11 on the end face of the membrane element body 10.
  • the pure water flows from the inner side of the membrane element body 10, for example, through The through hole 23 on the center tube 20 flows into the center tube 20 and finally flows out from the end of the center tube 20.
  • waste water flows out from the waste water outlet 12 on the end face of the membrane element body 10.
  • the reverse osmosis membrane element further includes a sealing layer 30 that covers the outer surface of the membrane element body 10 and seals the outer surface of the membrane element body 10.
  • the sealing layer 30 covers the outer surface of the membrane element body 10, which means that the entire outer surface of the membrane element body 10 is completely covered, so as to effectively prevent the outer surface of the membrane element body 10 from expanding.
  • sealing layer 30 is described in detail below through two embodiments, but it is not limited thereto.
  • the sealing layer 30 includes a sealing and fastening layer, the sealing and fastening layer is a sealing winding strip 31, and the sealing winding strip 31 Wrapped on the outer side of the membrane element body 10.
  • the sealing winding strip 31 refers to a belt-like structure, which can be a round belt or a flat structure.
  • the length of the sealing winding strip 31 is relatively long, so that it can be more on the outer surface of the membrane element body 10. Times winding.
  • the sealing winding strip 31 may be a glass fiber or a metal wire, and the metal wire may be a stainless steel wire.
  • the sealing winding strip 31 can be wound with multiple layers on the outer side of the membrane element body 10, and each layer seals the outer side of the membrane element body 10 or the previous layer.
  • the winding strip 31 is wrapped inside.
  • the sealing layer 30 further includes a sealant layer 33 (as shown in FIG. 3), and the sealant layer 33 connects the adjacent sealing winding strip 31, the sealing winding strip and the membrane element body. 10.
  • a sealant layer 33 can be brushed on the outer side of the membrane element body 10 first, and then the sealing winding strip 31 is wound on the sealant layer 33, so that the sealing winding strip 31 and the membrane element body 10 The connection is more tight.
  • the sealant layer 33 can also connect two adjacent sealing winding strips 31 together. For the embodiment with multiple sealing winding strips 31, after each layer of sealing winding strip 31 is wound, a layer of sealant 33 is brushed on the wound sealing winding strip 31 to improve the adjacent two layers of sealing winding strips.
  • the sealing winding strip 31 is soaked in glue in advance, and then the sealing winding strip 31 soaked with glue is wound on the membrane element body 10, and the glue can form a sealant between the sealing winding strip 31 and the membrane element body 10 after the glue is solidified
  • the layer 33 and the sealant layer 33 are formed between two adjacent layers of sealing and winding strips 31.
  • a sealant layer 33 can be formed between two adjacent layers of sealing and winding strips 31.
  • the sealant layer 33 may be epoxy glue or food grade AB glue, and the main component is polyurethane.
  • the glass fiber has good compatibility with the resin, which can increase the adhesion of glue and improve the tightness between the sealing winding strip 31 and the membrane element body 10.
  • the reverse osmosis membrane element further includes a first end cover 40 and a second end cover 50, the first end cover 40 and the second end cover 50 are respectively arranged in the At both ends of the membrane element body 10, the first end cover 40 has a first sealing wall 41 ringed on the outer side of the membrane element body 10, and the second end cover 50 has a ring ring arranged on the membrane element body. 10 The second sealing wall 51 on the outer side.
  • first end cover 40 and the membrane element body 10 can be provided with a sealant for sealing connection.
  • second end cover 50 and the membrane element body 10 can also be provided with a sealant for sealing connection.
  • the first sealing wall 41 and the second sealing wall 51 are both ring-shaped and tightly wrapped on the outer surface of the membrane element body 10.
  • the first sealing wall 41, the second sealing wall 51 and the sealing winding strip 31 jointly seal and wrap the outer surface of the membrane element body 10.
  • the first sealing wall 41 and the second sealing wall 51 are both arranged between two adjacent layers of the sealing winding strips 31. Specifically, first wind one or more layers of sealing winding strips 31 on the outer surface of the membrane element body 10, and after winding for a period of time, then install the first end cap 40 and the second end cap 50 to the membrane element body 10. Then continue to wind the sealing winding strip 31 until the first sealing wall 41 of the first end cover 40 and the second sealing wall 51 of the second end cover 50 are completely wound and sealed by the sealing winding strip 31.
  • the first sealing wall 41 and the second sealing wall 51 are both arranged between two adjacent layers of the sealing winding strip 31.
  • the sealing between the first sealing wall 41 and the sealing winding strip 31 can be improved.
  • first sealing wall 41 and the second sealing wall 51 may be arranged between the sealing winding strip 31 and the membrane element body.
  • the reverse osmosis membrane element has a first end surface 13 and a second end surface 14 opposite to the first end surface 13, the end where the first end cover 40 is located is the first end surface 13, and the end where the second end cover 50 is located is the second end surface 14.
  • FIG. 10A, FIG. 10B, and FIG. 11A, FIG. 11B wherein the structure of the first end cap 40 shown in FIG. 10A and FIG. 10B is slightly different from the structure of the first end cap 40 in FIG. 6A and FIG. 6B different.
  • the structure of the second end cap 50 shown in FIGS. 11A and 11B is also slightly different from the structure of the second end cap 50 in FIG. 1.
  • the first sealing wall 41 can be provided with a first glue containing hole 411, the sealing winding strip 31 sealingly wraps around the first glue containing hole 411; and/or, the second sealing wall A second glue-containing hole 511 may be opened in 51, and the sealing winding strip 31 seals and wraps the second glue-containing hole 511.
  • a plurality of first glue containing holes 411 may be opened, and the plurality of first glue containing holes 411 are arranged at intervals along the circumferential direction of the first sealing wall 41.
  • the shape of the first glue containing hole 411 may be a strip, a square, a triangle, a circle, etc., for example, the long first glue containing hole 411 extends along the axial direction of the first end cover 40.
  • a plurality of second glue containing holes 511 may be opened, and the plurality of second glue containing holes 511 are arranged at intervals along the circumferential direction of the second sealing wall 51.
  • the shape of the second glue containing hole 511 may be elongated, square, triangular or circular, etc.
  • the elongated second glue containing hole 511 extends along the axial direction of the second end cover 50.
  • the sealing winding strip 31 seals and winds the first glue containing hole 411 and the second glue containing hole 511, which means that the sealing winding strip 31 sealingly covers the first glue containing hole 411 and the second glue containing hole 511.
  • the sealing winding strip can be accommodated in the first glue containing hole 411 and the second glue containing hole 511.
  • first glue containing hole 411 and the second glue containing hole 511 By providing the first glue containing hole 411 and the second glue containing hole 511, excess glue can be contained in the first glue containing hole 411 and the second glue containing hole 511, which increases the glue containing space and improves the bonding effect.
  • the first end cover 40 may further be provided with a limiting ring groove 431, the limiting ring groove 431 extending along the circumferential direction of the first sealing wall, the limiting ring groove 431 is provided with the sealing winding Article 31.
  • the limiting ring groove 431 may be provided in multiples, and the plurality of limiting ring grooves 431 are arranged at intervals along the axial direction of the first end cover 40.
  • the arrangement of the limiting ring groove 431 enables at least one or more turns of the sealing winding strip to be embedded in the limiting ring groove 431, thereby limiting the sealing winding strip and avoiding its axial direction in the first end cover. move.
  • the first end cap further has a connecting wall 43 and a limiting wall 42, the limiting wall 42 faces the end surface of the membrane element body, and the connecting wall 43 and the first sealing wall are respectively connected to the
  • the limiting wall 42 extends in the opposite direction, that is, the connecting wall 43 and the first sealing wall are separately provided on two opposite sides of the limiting wall 42, and the two are arranged along the axial direction of the first end cover.
  • the connecting wall 43 protrudes out of the membrane element body in a direction away from the membrane element body.
  • the limiting wall 42 may directly abut against the end surface of the membrane element body 10, or the limiting wall 42 may abut against the third end cover 60, so that the first end cover 40 can be restricted from facing the direction where the second end cover 50 is located. sports.
  • the first sealing wall 41 is connected to the edge of the limiting wall 42, and the cross section of the two forms an L-shaped structure.
  • the connection position of the first sealing wall and the limiting wall 42 is spaced apart from the edge of the limiting wall 42, and the cross section of the two forms a T-shaped structure.
  • the connecting wall 43 may be connected to the edge of the limiting wall 42, and the cross section of the two forms an L-shaped structure.
  • the connecting position of the connecting wall 43 and the limiting wall 42 is spaced apart from the edge of the limiting wall 42, and the cross section of the two forms a T-shaped structure.
  • the limiting ring groove 431 is provided on the connecting wall 43.
  • the first end cover 40 can receive the pulling force of the sealing winding strip toward the second end cover 50 under the action of the sealing winding strip, so that the first end cover 40 is better fixed to the membrane element body and preventing the first Movement of the end cap 40.
  • Both the raw water inlet 11 and the waste water outlet 12 can be arranged close to the first end surface 13, and some communication ports are formed on the first end cover 40, namely the limiting wall 4242, which communicate with the raw water inlet 11, the pure water outlet and the waste water outlet 12 respectively.
  • One end of the membrane element body 10 is provided with a second end cover 50, the second end cover 50 has a third sealing wall 52, and the third sealing wall 52 is sealed with the end surface of the membrane element body 10 Glue sealing and bonding.
  • the third sealing wall 52 faces the end surface of the membrane element body 10, and the second sealing wall 51 is connected to the third sealing wall 52.
  • Support ribs are provided on the third sealing wall, and the support ribs abut against the end surface of the membrane element body 10.
  • the number of supporting ribs is multiple, and they are arranged at intervals along the circumferential direction of the second end cover 50.
  • the plurality of supporting ribs includes a first supporting rib 521 and a second supporting rib 522. Arrange to the interval.
  • the second supporting rib 522 may have a ring shape, and the ring-shaped second supporting rib 522 also extends along the circumference of the second end cover 50. In this way, the contact force distribution between the membrane element body 10 and the third sealing wall 52 is more uniform.
  • the support ribs are arranged so that there is a gap between the third sealing wall 52 and the end surface of the membrane element body 10, which can accommodate more sealant, thereby improving the gap between the third sealing wall 52 and the end face of the membrane element body 10. Connection effect.
  • the second end cover 50 can be provided with a limiting post 53 inserted into the central tube 20 to restrict the movement of the central tube 20.
  • a through hole 23 may be provided on the limiting column 53.
  • the sealing and fastening layer is a sealing cylinder 32, and the sealing cylinder 32 is sleeved on the outer surface of the membrane element body 10.
  • the material of the sealing cylinder 32 may be plastic or stainless steel, wherein the cost of plastic is low, and the strength of stainless steel is high.
  • the sealing cylinder 32 can be directly sleeved outside the membrane element body 10, the installation method is simple, and the production efficiency can be greatly improved.
  • the sealing cylinder 32 may wrap the entire outer surface of the membrane element body 10; or, the sealing cylinder 32 may only wrap a part of the outer surface of the membrane element body 10 inside.
  • the sealing cylinder 32 may be provided in the middle area of the outer side surface of the membrane element body 10.
  • the two ends of the sealing cylinder 32 are respectively spliced with the first sealing wall 41 and the second sealing wall 51 to jointly wrap the outer surface of the membrane element.
  • the two ends of the sealing cylinder 32 can form a stepped structure or a slot structure, and the first sealing wall 41 and the second sealing wall 51 are respectively inserted and matched to form a spliced structure.
  • both the first sealing wall 41 and the second sealing wall 51 may be formed with a stepped structure or a slot structure, and the two ends of the sealing cylinder 32 are respectively inserted.
  • a stepped structure is formed on both ends of the sealing cylinder 32, the first sealing wall 41 and the second sealing wall 51, so that the outer surface of the finally formed sealing layer 30 is a smooth surface.
  • the end surfaces of the sealing cylinder 32 may abut the end surfaces of the first sealing wall 41 and the end surfaces of the second sealing wall 51, respectively.
  • the sealing layer 30 also includes a sealant layer 33 arranged between the sealing and fastening layer and the outer side surface of the membrane element body 10.
  • sealant is filled between the sealing cylinder 32 and the outer surface of the membrane element body 10 to form a sealant layer 33.
  • the second sealing wall 51 Glue is filled between the outer surface of the membrane element body 10 and the membrane element body 10, thereby sealing the entire outer surface of the membrane element body 10, which can ensure the tightness between the sealing layer 30 and the membrane element body 10, avoid the generation of gaps, and thus can prevent The outer side of the membrane element body 10 bursts.
  • first end cover 40 and the membrane element body 10 can also be ultrasonically welded.
  • the reverse osmosis membrane element may further include a third end cover 60, the third end cover 60 and the first end cover 40 are arranged at the same end of the membrane element body 10, and The third end cover 60 is located between the first end cover 40 and the end surface of the membrane element body 10.
  • the third end cover 60 and the first end cover 40 may jointly form a plurality of communication ports.
  • a communication port is formed between the outside of the third end cover 60 and the inside of the first sealing wall 41, and the communication port is used for the raw water to enter the raw water inlet 11 of the membrane element body 10.
  • a communication port is opened on the third end cover 60 near the center tube 20, and the communication port is used for the waste water to flow out.
  • a through hole may be opened in the middle area of the third end cover 60 for the central pipe 20 to pass through, so that pure water flows from this end of the central pipe 20 to the pure water outlet 76.
  • a positioning column 61 is provided in the middle area of the third end cover 60, and the positioning column 61 is inserted into the central tube 20 to limit the central tube 20.
  • the positioning column 61 can close this end of the central tube 20 so that pure water flows toward the other end of the central tube 20.
  • the positioning column 61 may be provided with water flow holes, so that the pure water flows from the water flow holes to the pure water outlet 76.
  • the structure of the third end cap 60 can also be as shown in Figure 9, Figure 12A and Figure 12B.
  • the fifth end cap 96 to be installed.
  • the reverse osmosis membrane element may also include a fifth end cap 96, the fifth end cap 96 and the first end cap 40 are provided on the same end of the membrane element body 10, and the fifth The end cap 96 is located inside the third end cap 60.
  • the third end cap 60 and the fifth end cap 96 may jointly form a plurality of communication ports.
  • the structure for positioning the central tube 20, for example, the positioning column 61 may be formed on the fifth end cover 96.
  • the third end cover 60 is disposed between the first end cover 40 and the fifth end cover 96.
  • the filter element includes a housing 70 and a reverse osmosis membrane element.
  • a reverse osmosis membrane element For the specific structure of the reverse osmosis membrane element, please refer to the above-mentioned embodiment, which will not be repeated here.
  • the housing 70 has an installation cavity, a pure water storage cavity 73, a raw water inlet 74, a waste water outlet 75, and a pure water outlet 76.
  • the raw water inlet 74 is in communication with the raw water inlet 11
  • the waste water outlet 75 is in communication with the waste water outlet 12
  • the pure water outlet 76 is in communication with the pure water outlet
  • the pure water storage cavity 73 is in communication with the pure water outlet; the reverse osmosis membrane element Located in the installation cavity.
  • the housing 70 is substantially cylindrical, and the housing 70 and the reverse osmosis membrane element are substantially coaxially arranged.
  • the housing 70 includes a cylinder 71 and a fourth end cover 72. One end of the cylinder 71 is closed and the other end is open.
  • the fourth end cover 72 covers the opening of the cylinder 71.
  • the fourth end cover 72 is provided with a raw water inlet 74, a waste water outlet 75, and a pure water outlet 76.
  • a plurality of communication ports formed on the first end cover 40 and the third end cover 60 sequentially connect the raw water inlet 74 with the raw water inlet 11, the waste water outlet 75 and the waste water outlet 12, and the pure water outlet 76 and the pure water outlet are connected. .
  • the space in the housing 70 excluding the installation cavity may constitute a pure water storage cavity 73.
  • the pure water storage cavity 73 may be located at the end of the housing 70, or the pure water storage cavity 73 may be located on the peripheral side of the housing 70. At least, the pure water storage cavity 73 is located outside the reverse osmosis membrane element. After the pure water flows out from the end of the central pipe 20, it flows to the pure water storage cavity 73.
  • part of the pure water is always stored in the pure water storage cavity 73.
  • the arrangement of the pure water storage cavity 73 makes the amount of pure water retained in the entire filter element greatly increase after the water purifier is shut down. Therefore, even if the wastewater seeps into the pure water side after the shutdown, this part of the wastewater that has penetrated into the pure water side will be diluted by a large amount of pure water after being mixed with a larger amount of pure water, so that the unit volume of pure water contains The amount of harmful substances is greatly reduced, that is, the TDS value in the retained pure water is lower.
  • the sealing layer 30 can ensure that the entire reverse osmosis membrane element has sufficient strength and sealability, so that pure wastewater does not flow through. Water can prevent the pressure difference (6-12 kg) between the raw water and the pure water at the same time, thereby realizing the setting of the pure water storage cavity 73. Compared with the traditional additional water tank to backwash the membrane element body 10, the solution in the embodiment of the present application does not need to add other equipment, so that the TDS value of the first glass of water can be reduced.
  • the pure water storage cavity 73 includes an end storage cavity 731, and the end storage cavity 731 is located between the second end surface 14 and the wall surface of the housing 70.
  • the central tube 20 is inserted into the end storage cavity 731, or the end of the central tube 20 is butted with the end storage cavity 731.
  • the end storage cavity 731 has a variety of structures. Please refer to FIGS. 1 to 4 in combination.
  • the second end surface 14 and the wall surface of the housing 70 are arranged at intervals, and the interval constitutes the end storage cavity. Cavities 731.
  • the wall surface of the housing 70 refers to the surface facing the second end surface 14.
  • the second end cover 50 may be provided with a supporting protrusion 54, and the supporting protrusion 54 abuts against the surface of the casing 70 facing the second end surface 14.
  • the surface of the housing 70 facing the second end surface 14 may also be provided with a mounting protrusion, and the mounting protrusion abuts against the second end surface 14.
  • a drainage groove 55 may be provided on the second end cover 50, and the drainage groove 55 can contain pure water.
  • the drainage groove 55 can also drain pure water to the annular storage cavity 732.
  • the wall surface of the housing 70 facing the second end surface 14 is provided with a groove, and the groove constitutes the end storage cavity 731.
  • the second end surface 14 can be in contact with the wall surface of the housing 70 facing the second end surface 14, and the end storage cavity 731 is a groove opened on the wall surface.
  • the second end surface 14 may be spaced from the wall surface of the housing 70 facing the second end surface 14, and the space and the groove together constitute the end storage cavity 731.
  • the pure water storage cavity 73 further includes an annular storage cavity 732, and the annular storage cavity 732 communicates with the end storage cavity 731.
  • annular gap between the outer side surface of the membrane element body 10 and the wall surface of the casing 70, and the annular gap constitutes the annular storage cavity 732.
  • the arrangement of the annular storage cavity 732 and the end storage cavity 731 makes the entire reverse osmosis membrane element basically immersed in pure water, which improves the life of the reverse osmosis membrane.
  • the annular storage cavity 732 and the end storage cavity 731 jointly store pure water, which realizes a substantial increase in the amount of pure water and effectively reduces the dilution of the first glass of water.
  • the two ends of the central pipe 20 pass through, the pure water outlet 76 is located close to the first end surface 13, and the central pipe 20 is close to the One end of the first end surface 13 is in communication with the pure water outlet 76, and an end of the central pipe 20 close to the second end surface 14 is in communication with the pure water storage cavity 73.
  • the pure water storage cavity 73 having both an end storage cavity 731 and an annular storage cavity 732 as an example.
  • the end of the annular storage cavity 732 close to the second end surface 14 is open.
  • And communicate with the end storage cavity 731, and the end of the annular storage cavity 732 close to the first end surface 13 is closed, so as to ensure that the pure water storage cavity 73 only has a communication port with the central pipe 20, which can prevent the pure water from approaching the first end One end of the end face 13 flows away, ensuring the water storage function of the pure water storage cavity 73.
  • first sealing wall 41 of the first end cover 40 can be in sealing abutment with the inner wall of the housing 70, so that the end of the annular storage cavity 732 close to the first end surface 13 is closed.
  • a sealing ring rib may be provided on the first sealing wall 41 or on the inner wall of the housing 70 to realize that the end of the annular storage cavity 732 close to the first end surface 13 is closed.
  • the pure water storage cavity 73 having an end storage cavity 731 as an example.
  • the outside of the end storage cavity 731 is sealed.
  • the water storage cavity 73 only has a communication port with the central pipe 20, which can prevent pure water from flowing out from other locations.
  • the pure water outlet 76 is closed, the pressure at the raw water end is disconnected, and the pure water in the pure water storage chamber 73 can be reversed to flush the membrane element body under the reverse pressure of the compressed gas 10.
  • the waste water is squeezed out from the waste water outlet 75, so that the amount of waste water in the filter element can be reduced, thereby further reducing the amount of waste water exchange, so that the concentration balance inside the filter element can be reached as soon as possible.
  • the remaining pure water after backwashing the membrane element body 10 in the pure water storage cavity 73 can also dilute the first glass of water. Thereby, the effect of the first glass of water is further improved, and real fresh water with large flux is realized.
  • the tds value of the first cup of water is about 80 (the TDS value of the raw water is 100) after it is not connected.
  • Figure 8 is a comparison test effect diagram of the first glass of water with a single core. It can be clearly seen from the figure that after the filter element in the embodiment of the present application is used, the first glass of water is especially the first three cups of water compared to the Industry 4.0 side flow membrane. The desalination rate of water is gradually increasing, while the desalination rate of the first glass of water in the industry 4.0 side flow film, especially the first three glasses of water, is gradually decreasing. It can be seen that the filter element in the embodiment of the present application can effectively reduce the TDS value of the first glass of water.
  • the two ends of the central pipe 20 penetrate through, the pure water outlet 76 is arranged close to the first end surface 13, and the end of the central pipe 20 close to the first end surface 13 is connected to the pure water
  • the discharge port 76 is in communication, and the end of the central pipe 20 close to the second end surface 14 is in communication with the pure water storage cavity 73.
  • FIG. 5 in conjunction with FIG. 5, taking the pure water storage cavity 73 having both an end storage cavity 731 and an annular storage cavity 732 as an example.
  • the end of the annular storage cavity 732 close to the second end surface 14 is open, and The end storage cavity 731 is in communication, and the end of the annular storage cavity 732 close to the first end surface 13 is also open.
  • a water flow channel 77 is formed between the housing 70 and the first sealing wall 41, and the water flow channel 77 is respectively connected to the ring The storage cavity 732 and the pure water discharge port 76.
  • the pure water produced by the membrane element body 10 flows into the central pipe 20, and a part of the pure water flows from the end of the central pipe 20 close to the first end surface 13 to the pure water outlet 76; the other part of pure water flows from the central pipe 20 close to the second One end of the two end surfaces 14 flows to the end storage cavity 731 and the annular storage cavity 732, and then flows to the pure water outlet 76 via the water flow channel 77.
  • pure water is discharged from both ends of the central pipe 20, which can reduce the pressure on the pure water side, realize the rapid preparation of pure water, and increase the water discharge rate.
  • the end of the central tube 20 close to the first end surface 13 is closed, the end of the central tube 20 close to the second end surface 14 is connected, and the pure The water outlet 76 is arranged close to the first end surface 13, and the pure water storage cavity 73 is in communication with the pure water outlet 76.
  • the central pipe 20 has a first pipe section 21 and a second pipe section 22.
  • the first pipe section 21 is close to the first end surface 13, and the second pipe section 22 is close to the second end surface 14.
  • the second pipe section 22 is provided with a through hole 23.
  • the first pipe section 21 and the second pipe section 22 are separated by a partition plate 24, pure water flows from the through hole 23 on the second pipe section 22 to the pure water outlet 76, and no pure water is discharged from the first pipe section 21.
  • the closed end of the central tube 20 close to the first end surface 13 may mean that the end surface of the central tube 20 is closed.
  • the end of the annular storage cavity 732 close to the second end surface 14 is open and communicates with the end storage cavity 731 .
  • the end of the annular storage cavity 732 close to the first end surface 13 is also open, and communicates with the pure water outlet 76.
  • the pure water outlet 76 When the machine is shut down, the pure water outlet 76 is closed, so pure water is always reserved in the pure water storage cavity 73. This part of the pure water can be mixed with some substances penetrated by the wastewater to dilute it, so when the machine is turned on again At this time, the TDS value of the first glass of water alive is greatly reduced.
  • the first pipe section 21 of the central pipe 20 can also communicate with the waste water outlet 12 from the end surface of the membrane element body 10 (which can be the side where the first end surface 13 is located, or the second end surface 14 is located).
  • the waste water flowing out on the side can flow into the first pipe section 21 and flow from the end of the central pipe 20 close to the first end surface 13 to the waste water outlet 75 of the housing 70.
  • the end of the central tube 20 close to the first end surface 13 can be blocked by the positioning post 61 on the third end cover 60. After the waste water flows out from the end surface of the membrane element body 10, it can also directly flow from the first end. The opening in the cover 40, the second end cover 50, or the third end cover 60 flows out.
  • the two ends of the central pipe 20 pass through, the pure water outlet 76 is disposed close to the first end surface 13, and the central pipe 20 is close to the first end surface 13.
  • One end of the central tube 20 communicates with the pure water outlet 75, and one end of the central pipe 20 close to the second end surface 14 communicates with the pure water outlet of the membrane element body 10 and the pure water storage cavity 73, respectively.
  • the filter element may be a composite filter element and includes a first filter group 80 disposed in the annular gap between the membrane element body 10 and the central tube 20.
  • the first filter group 80 includes an inner tube 81 and a first filter element 82.
  • the inner tube 81 separates the annular gap into an inner cavity and an outer cavity 85.
  • the inside of the inner tube 81 is an inner cavity, and the first filter element 82 is installed in The inner cavity and the first filter element 82 are arranged around the central tube 20, and the first water outlet gap 84 is formed between the two.
  • the first filter element 82 and the inner tube 81 are equally spaced apart to form a first water inlet gap 83.
  • the membrane element body 10 is an RO membrane
  • the first filter element 82 is a PAC filter element.
  • the above-mentioned combined membrane element body 10 and the first filter group 80 occupies the smallest space under the condition of meeting the filtering requirements of the composite filter element, which can maximize the utilization efficiency of the internal space of the housing 70, and is beneficial to reduce the volume of the composite filter element. Provides convenience for users to use.
  • the raw water enters the first water inlet gap 83, flows along the radial direction of the first filter element 82, enters the first water outlet gap 84 after being filtered by the first filter element 82, and then flows out from the first water outlet gap 84. Then, the water flow enters from the raw water inlet on the end surface of the membrane element body 10, and after being filtered by the membrane element body 10, the waste water is discharged from the waste water outlet, and the pure water flows out from the pure water outlet to the outer cavity 85. Then a part of pure water flows into the central pipe 20 from one end of the central pipe 20 and flows from the other end to the pure water outlet 76; the other part of pure water flows directly to the pure water storage chamber 73.
  • the filter element also includes a frame 93, the frame 93 is cylindrical, and the membrane element body 10 is wound on the frame 93.
  • the first filter group 80 is located in the frame 93 and is spaced apart from the frame 93. The space is the outer cavity 85.
  • the peripheral wall of the frame 93 is provided with a plurality of water passing holes for the pure water discharged from the membrane element body 10 to flow into the frame 93.
  • the frame 93 is generally a structure with one end open and the other end closed, that is, one end of the frame 93 is an open end, and the other end is provided with a cover plate 94.
  • the open end of the skeleton 93 is used for the installation of the first filter group 80, and the open end can be connected to the first filter group 80 in a sealed manner or with other structures to prevent water flow from entering and exiting from the open end.
  • the end of the first filter group 80 and the cover plate 94 of the skeleton 93 are spaced apart to form a pure water cavity, and the central pipe partially extends into the pure water cavity, or the central pipe does not extend into the pure water cavity.
  • the filter element also includes a second filter group 90, which is arranged in the pure water cavity.
  • the second filter group 90 can be arranged around the central tube, and the pure water cavity is set as the second water inlet gap 91 And the second water outlet gap 92, the second water inlet gap 91 is located on the outer circumference of the second filter group 90, and the second water outlet gap 92 is located on the inner circumference of the second filter group 90.
  • the second filter group 90 may adopt an activated carbon filter structure.
  • the cover plate 94 of the frame 93 is provided with a water outlet hole 95, and the water outlet hole 95 connects the second water outlet gap 92 with the pure water storage cavity.

Abstract

一种反渗透膜元件、滤芯和净水器，其中，所述反渗透膜元件包括：膜元件本体（10），卷设呈筒状，所述膜元件本体（10）的内侧面具有纯水出口，所述膜元件本体（10）的端面具有原水进口（11）和废水出口（12）；以及密封层（30），包覆于所述膜元件本体（10）的外侧面，并将所述膜元件本体（10）的外侧面密封。

Description

反渗透膜元件、滤芯和净水器
优先权信息
本申请要求于2020年3月21日申请的、申请号为202010210199.6、202020378777.2的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及净水设备领域，特别涉及一种反渗透膜元件、滤芯和净水器。
背景技术
对于端面进原水，内侧面出纯水的传统反渗透膜，由于原水的水压较大，因此反渗透膜侧向受到的压力较大。为了避免反渗透膜外侧面由于原水压力过大而朝外胀开，通常，反渗透膜外侧面与安装该反渗透膜的壳体之间是间隔开来的，如此导致整个滤芯的体积过大。
发明内容
本申请的主要目的是提出一种反渗透膜元件，旨在减小反渗透元件的体积。
为实现上述目的，本申请提出的反渗透膜元件包括：
膜元件本体，卷设呈筒状，所述膜元件本体的内侧面具有纯水出口，所述膜元件本体的端面具有原水进口和废水出口；以及，
密封层，包覆于所述膜元件本体的外侧面，并将所述膜元件本体的外侧面密封。
在一实施例中，所述密封层包括密封缠绕条，所述密封缠绕条缠绕在所述膜元件本体的外侧面。
在一实施例中，所述密封缠绕条为玻璃纤维；和/或，
所述密封层还包括密封胶层，所述密封胶层连接相邻的所述密封缠绕条、以及所述密封缠绕条和所述膜元件本体。
在一实施例中，所述膜元件本体的一端设有第一端盖，另一端设有第二端盖，所述第一端盖具有环设在所述膜元件本体外侧面的第一密封壁，所述第二端盖具有环设在所述膜元件本体外侧面的第二密封壁；
所述第一密封壁、所述第二密封壁和所述密封缠绕条共同密封包裹所述膜元件本体的外侧面。
在一实施例中，所述膜元件本体的外侧面缠绕有多层所述密封缠绕条；
其中，所述第一密封壁和所述第二密封壁均设置在相邻的两层所述密封缠绕条之间；或者，所述第一密封壁和所述第二密封壁均设置在所述密封缠绕条与所述膜元件本体之间。
在一实施例中，所述第一密封壁开设有第一容胶孔，所述密封缠绕条密封缠绕所述第一容胶孔；和/或，
所述第二密封壁开设有第二容胶孔，所述密封缠绕条密封缠绕所述第二容胶孔。
在一实施例中，所述第一端盖还设有限位环槽，所述限位环槽沿所述第一密封壁的周向延伸，所述限位环槽内绕设有所述密封缠绕条。
在一实施例中，所述第一端盖还具有连接壁和限位壁，所述限位壁面向所述膜元件本体的端面，所述连接壁和所述第一密封壁分别连接所述限位壁，并沿相反反向延伸，所述连接壁上设有所述限位环槽。
在一实施例中，所述密封层包括密封筒，所述密封筒套设在所述膜元件本体的外侧面。
在一实施例中，所述密封筒的两端分别与第一密封壁和第二密封壁拼接，而共同包裹所述膜元件的外侧面；和/或，
所述密封层还包括设置在所述密封筒和所述膜元件本体外侧面之间的密封胶层。
在一实施例中，所述膜元件本体的一端设有第二端盖，所述第二端盖具有第三密封壁，所述第三密封壁与所述膜元件本体的端面之间通过密封胶密封粘接；并且所述第三密封壁上设有支撑筋，所述支撑筋与所述膜元件本体的端面抵接。
在一实施例中，所述原水进口和废水出口位于所述膜元件本体的同一端面。
本申请还提出一种滤芯，包括壳体和反渗透膜元件；
所述壳体具有安装腔、纯水存储腔、原水入口、废水排出口和纯水排出口，所述原水入口与所述原水进口连通，所述废水排出口与所述废水出口连通，所述纯水排出口与所述纯水出口连通，所述纯水存储腔与所述纯水出口连通；所述反渗透膜元件位于所述安装腔内。
在一实施例中，所述反渗透膜元件具有相对的第一端面和第二端面，所述纯水存储腔包括端部存储腔，所述端部存储腔位于所述第二端面和所述壳体的壁面之间。
在一实施例中，所述第二端面和所述壳体的壁面间隔设置，该间隔构成所述端部存储腔；或者，所述壳体面向所述第二端面的壁面开设有凹槽，该凹槽构成所述端部存储腔。
在一实施例中，所述纯水存储腔还包括环形存储腔，所述环形存储腔与所述端部存储腔连通，所述膜元件本体的外侧面与所述壳体的壁面之间具有环形间隙，该环形间隙构成所述环形存储腔。
在一实施例中，所述滤芯还包括中心管，所述膜元件本体环绕所述中心管卷设而呈筒状；
其中，所述中心管的周壁开设有通孔而连通所述纯水出口，所述中心管的两端贯通，所述纯水排出口靠近第一端面设置，所述中心管靠近所述第一端面的一端与所述纯水排出口连通，所述中心管靠近第二端面的一端与所述纯水存储腔连通；或者，
所述中心管的周壁开设有通孔而连通所述纯水出口，所述中心管靠近所述第一端面的一端封闭，所述中心管靠近所述第二端面的一端导通，所述纯水排出口靠近所述第一端面设置，所述纯水存储腔与所述纯水排出口连通；或者，
所述中心管的两端贯通，所述纯水排出口靠近第一端面设置，所述中心管靠近所述第一端面的一端与所述纯水排出口连通，所述中心管靠近第二端面的一端分别与所述膜元件本体的纯水出口和所述纯水存储腔连通。
本申请还提出一种净水器，所述净水器包括滤芯。
本申请中的密封层包覆于膜元件本体的外侧面，该密封层与膜元件本体的外侧面是紧紧贴合的，使得最终形成的产品的尺寸更小，减小对整个装置的空间的占用。同时，该密封层形成的高强度保护层能够有效防止膜元件本体的外侧面胀开。
附图说明
为了更清楚地说明本申请实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为本申请滤芯第一实施例的剖切示意图；
图2为图1中滤芯在原水端压力断开后的水路示意图；
图3为本申请滤芯第二实施例的剖切示意图；
图4为本申请滤芯第三实施例的剖切示意图；
图5为本申请滤芯第四实施例的剖切示意图；
图6A为图1中第一端盖的主视图；
图6B为图6A中第一端盖的仰视图；
图7A为图1中第三端盖的仰视图；
图7B为图7A中第三端盖的主视图；
图7C为图7A中第三端盖的俯视图；
图8为单芯首杯水对比测试效果图；
图9为本申请滤芯第五实施例的剖切示意图；
图10A为图9中第一端盖的结构示意图；
图10B为图9中第一端盖从另一角度看的结构示意图；
图11A为图9中第二端盖的结构示意图；
图11B为图9中第二端盖从另一角度看的结构示意图；
图12A为图9中第三端盖的结构示意图；
图12B为图9中第三端盖从另一角度看的结构示意图；
图13A为图9中第五端盖的结构示意图；
图13B为图9中第五端盖从另一角度看的结构示意图；
图14为本申请滤芯第六实施例的剖切示意图；
图15为图14中A处的放大示意图。
附图标号说明：
标号 名称 标号 名称
10 膜元件本体 54 支撑凸起
11 原水进口 55 引流槽
12 废水出口 60 第三端盖
13 第一端面 61 定位柱
14 第二端面 70 壳体
20 中心管 71 筒体
21 第一管段 72 第四端盖
22 第二管段 73 纯水存储腔
23 通孔 731 端部存储腔
24 隔板 732 环形存储腔
30 密封层 74 原水入口
31 密封缠绕条 75 废水排出口
32 密封筒 76 纯水排出口
33 密封胶层 77 水流通道
40 第一端盖 80 第一过滤组
41 第一密封壁 81 内管
411 第一容胶孔 82 第一过滤元件
42 限位壁 83 第一进水间隙
43 连接壁 84 第一出水间隙
431 限位环槽 85 外腔
50 第二端盖 90 第二过滤组
51 第二密封壁 91 第二进水间隙
511 第二容胶孔 92 第二出水间隙
52 第三密封壁 93 骨架
521 第一支撑筋 94 盖板
522 第二支撑筋 95 出水孔
53 限位柱 96 第五端盖
本申请目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本申请的一部分实施例，而不是全部的实施例。基于本申请中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本申请保护的范围。
需要说明，若本申请实施例中有涉及方向性指示(诸如上、下、左、右、前、后……)，则该方向性指示仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，若本申请实施例中有涉及“第一”、“第二”等的描述，则该“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括至少一个该特征。另外，全文中出现的“和/或”的含义为，包括三个并列的方案，以“A和/或B为例”，包括A方案，或B方案，或A和B同时满足的方案。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本申请要求的保护范围之内。
本申请提出一种反渗透膜元件。
在本申请实施例中，请结合参考图1，反渗透膜元件包括膜元件本体10。膜元件本体10卷设呈筒状，所述膜元件本体10的内侧面具有纯水出口，所述膜元件本体10的端面具有原水进口11和废水出口12。
其中，原水进口11和废水进口可以设置在同一个端面上，当然，其它实施例中，原水进口11和废水进口也可以分设于两个端面。
膜元件本体10大体呈中空的圆柱形，反渗透膜元件还可以包括中心管20，该中心管20安装在膜元件本体10的中空区域内，即膜元件本体10环绕中心管20卷设而呈筒状。膜元件本体10是以中心管20为中心进行缠绕卷膜的，中心管20为膜元件本体10提供了中心支撑结构。
一实施例中，中心管20的周壁上开设有多个通孔23而连通纯水出口，其中，中心管20的至少一端是贯通的，以将纯水排出。该实施例中，膜元件本体10卷绕在中心管20上，两者贴合。
一实施例中，中心管20的两端贯通，中心管20的一端与所述膜元件本体10的纯水出口连通，所述中心管20的另一端则供纯水排出。该实施例中，膜元件本体10可以直接绕设在中心管20上，或者，膜元件本体10与中心管20间隔设置。
具体地，原水从膜元件本体10端面上的原水进口11进入到膜元件本体10内部，在经过膜元件本体10过滤后，纯水从膜元件本体10的内侧面即内侧面，例如，可经由中心管20上的通孔23流入到中心管20，并最终从中心管20的端部流出。同时，废水则从膜元件本体10端面上的废水出口12流出。
请结合参考图3，反渗透膜元件还包括密封层30，密封层30包覆于所述膜元件本体10的外侧面，并将所述膜元件本体10的外侧面密封。
本申请实施例中的密封层30包覆于膜元件本体10的外侧面，指的是密封层30与膜元件本体10的外侧面是紧紧贴合的，同时也使得最终形成的产品的尺寸更小，减小对整个装置的空间的占用。
另外，密封层30包覆于膜元件本体10的外侧面，指的是将膜元件本体10的整个外侧面均全部包覆在内，从而能够有效防止膜元件本体10的外侧面胀开。
一实施例中，密封层30可以是外壳结构，膜元件本体10与外壳紧配合，该外壳将膜元件本体10紧紧包裹在内。一实施例中，密封层30可以是由带状结构一层层紧紧卷绕在膜元件本体10的外侧面上所形成。一实施例中，密封层30还可以是由膜状结构一层层卷绕在膜元件本体10的外侧面所形成。一实施例中，密封层30可以是外壳和带状结构共同形成。
以下通过两个实施例详细介绍密封层30的结构，但不限于此。
请再次结合参考图1、图2、图9和图14，一实施例中，所述密封层30包括密封紧固层，所述密封紧固层为密封缠绕条31，所述密封缠绕条31缠绕在所述膜元件本体10的外侧面。
密封缠绕条31指的是类似带状的结构，其可以是圆形的带状或是扁平结构的带状，密封缠绕条31的长度较长，以能够在膜元件本体10的外侧面上多次缠绕。例如，密封缠绕条31可以是玻璃纤维或金属丝，其中金属丝可以是不锈钢丝。
密封缠绕条31缠绕膜元件本体10的外侧面，可以是将整个膜元件本体10的外侧面均缠绕在内，或者，密封缠绕条31仅缠绕膜元件本体10的部分外侧面，在一实施例中，密封缠绕条31缠绕膜元件本体10外侧面的中间区域，膜元件本体10外侧面的两端区域则可通过其它的密封结构进行密封。
为使得密封缠绕条31的紧固性更好，密封缠绕条31可以在膜元件本体10的外侧面缠绕多层，并且每一层均将膜元件本体10的外侧面或是将前一层密封缠绕条31包裹在内。
所述膜元件本体10的外侧面缠绕有多层所述密封缠绕条31，相邻的两层所述密封缠绕条31之间均设有密封胶层33，如此密封胶层33将相邻的两层密封缠绕条31粘接在一起，从而提高了密封缠绕条31对膜元件本体10的束缚力。同时，对于同一层上相邻两圈密封缠绕条31，也是通过密封胶层33紧紧粘接在一起的，从而可以避免相邻两圈密封缠绕条31散开。采用密封胶层33后，能够使得密封缠绕条31所形成的密封层30的硬度极强。
采用密封缠绕条31进行缠绕的形式，密封缠绕条31所形成的密封层30硬度极强，可以防止原水与纯水间的压力差(对于家用膜元件而言，该压力差通常为6～12公斤)将膜元件本体10外侧面胀开，从而形成一个创新的反渗透膜元件。
另外，所述密封层30还包括密封胶层33(如图3所示)，所述密封胶层33连接相邻的所述密封缠绕条31、以及所述密封缠绕条和所述膜元件本体10。具体而言，可以先在膜元件本体10的外侧面刷上一层密封胶层33，然后再将密封缠绕条31缠绕在密封胶层33上，使得密封缠绕条31与膜元件本体10之间的连接更加紧固。同时，该密封胶层33还能够将相邻的两圈密封缠绕条31连接在一起。对于具有多层密封缠绕条31的实施例而言，每缠绕一层密封缠绕条31后，均在缠绕好的密封缠绕条31上刷一层密封胶层33，提高相邻两层密封缠绕条31之间的紧固力。或者，密封缠绕条31提前在胶水里面浸泡，然后再将浸泡有胶水的密封缠绕条31缠绕到膜元件本体10上，胶水凝固后能够在密封缠绕条31和膜元件本体10之间形成密封胶层33，以及在相邻的两层密封缠绕条31之间形成密封胶层33，同时，还能够在相邻的两圈密封缠绕条31之间形成密封胶层33。
上述中，密封胶层33可以是环氧胶或是食品级AB胶，主要成分为聚氨酯。另外，玻璃纤维与树脂相容性好，可以增加胶水的附着，提高密封缠绕条31与膜元件本体10之间的紧固性。
请结合参考图1、图6A和图6B，所述反渗透膜元件还包括第一端盖40和第二端盖50，所述第一端盖40和第二端盖50分别设置在所述膜元件本体10的两端，所述第一端盖40具有环设在所述膜元件本体10外侧面的第一密封壁41，所述第二端盖50具有环设在所述膜元件本体10外侧面的第二密封壁51。
其中，第一端盖40和膜元件本体10之间可以设置密封胶密封连接，同样地，第二端盖50和膜元件本体10之间也可以设置密封胶密封连接。
第一密封壁41和第二密封壁51均呈环状，而紧紧包裹在膜元件本体10的外侧面上。
所述第一密封壁41、所述第二密封壁51和所述密封缠绕条31共同密封包裹所述膜元件本体10的 外侧面。在一实施例中，所述第一密封壁41和所述第二密封壁51均设置在相邻的两层所述密封缠绕条31之间。具体地，先在膜元件本体10的外侧面上缠绕一层或多层密封缠绕条31，待缠绕一段时间后，然后再将第一端盖40和第二端盖50安装到膜元件本体10的两端，接着继续缠绕密封缠绕条31，直至第一端盖40的第一密封壁41和第二端盖50的第二密封壁51完全被密封缠绕条31缠绕密封。
第一密封壁41和所述第二密封壁51均设置在相邻的两层所述密封缠绕条31之间的形式，一方面可以提高第一密封壁41和密封缠绕条31之间的密封性能，以及所述第二密封壁51和密封缠绕条31之间的密封性能，避免膜元件本体10外侧爆破；另一方面可以提高第一端盖40和膜元件本体10的安装可靠性，以及第二端盖50和膜元件本体10的安装可靠性。
此外，其它实施例中，第一密封壁41和第二密封壁51可以设置在密封缠绕条31和膜元件本体之间。
该反渗透膜元件具有第一端面13和与之相对的第二端面14，第一端盖40所在的一端为第一端面13，第二端盖50所在的一端为第二端面14。
请结合参考图10A、图10B，以及图11A、图11B，其中，图10A和图10B中示出的第一端盖40的结构与图6A和图6B中第一端盖40的结构略有不同。图11A和图11B中示出的第二端盖50的结构也与图1中第二端盖50的结构略有不同。
为提高胶水的附着力，所述第一密封壁41可开设第一容胶孔411，所述密封缠绕条31密封缠绕所述第一容胶孔411；和/或，所述第二密封壁51可开设第二容胶孔511，所述密封缠绕条31密封缠绕所述第二容胶孔511。
具体而言，第一容胶孔411可开设多个，多个第一容胶孔411沿着第一密封壁41的周向间隔排布。第一容胶孔411的形状可以是长条形、方形、三角形或是圆形等，例如，长条形的第一容胶孔411沿着第一端盖40的轴向延伸。
同理，第二容胶孔511可开设多个，多个第二容胶孔511沿着第二密封壁51的周向间隔排布。第二容胶孔511的形状可以是长条形、方形、三角形或是圆形等，例如，长条形的第二容胶孔511沿着第二端盖50的轴向延伸。
密封缠绕条31密封缠绕第一容胶孔411和第二容胶孔511，指的是，密封缠绕条31密封覆盖在第一容胶孔411和第二容胶孔511上，对于环形的且为盲孔的第一容胶孔411和第二容胶孔511而言，密封缠绕条能够容置在第一容胶孔411和第二容胶孔511内。
通过设置第一容胶孔411和第二容胶孔511，多余的胶水可以容纳在第一容胶孔411和第二容胶孔511内，提高胶水的容纳空间，从而提升粘接效果。
所述第一端盖40还可设置限位环槽431，所述限位环槽431沿所述第一密封壁的周向延伸，所述限位环槽431内绕设有所述密封缠绕条31。限位环槽431可以设置多个，多个限位环槽431沿第一端盖40的轴向间隔排布。限位环槽431的设置，使得至少一圈或多圈密封缠绕条能够嵌入限位环槽431内，从而可以对密封缠绕条起到限位效果，避免其在第一端盖轴向上的移动。
一实施例中，所述第一端盖还具有连接壁43和限位壁42，所述限位壁42面向膜元件本体的端面，所述连接壁43和所述第一密封壁分别连接所述限位壁42，并沿相反反向延伸，即连接壁43和第一密封壁分设于限位壁42的两相对侧，并且两者沿着第一端盖的轴向排布，如此该连接壁43是朝远离膜元件本体的方向凸出在膜元件本体外的。
其中，限位壁42可以直接与膜元件本体10的端面抵接，或者，限位壁42与第三端盖60抵接，如此可以限制第一端盖40朝第二端盖50所在的方向运动。
第一密封壁41连接在限位壁42的边缘，两者的截面形成L形结构。或者，第一密封壁与限位壁42的连接位置距离限位壁42的边缘间隔设置，两者的截面形成T形结构。
连接壁43可以连接在限位壁42的边缘，两者的截面形成L形结构。或者，连接壁43与限位壁42的连接位置距离限位壁42的边缘间隔设置，两者的截面形成T形结构。
一实施例中，所述连接壁43上设有所述限位环槽431。如此，该第一端盖40能够在密封缠绕条的作用下，受到密封缠绕条朝向第二端盖50的拉扯力，从而使得第一端盖40更好的与膜元件本体固定，防止第一端盖40的移动。
原水进口11和废水出口12均可靠近第一端面13设置，则在第一端盖40上即限位壁4242形成有一些连通口，而分别连通原水进口11、纯水出口和废水出口12。
所述膜元件本体10的一端设有第二端盖50，所述第二端盖50具有第三密封壁52，所述第三密封壁52与所述膜元件本体10的端面之间通过密封胶密封粘接。该实施例中，第三密封壁52面向膜元件本体10的端面，第二密封壁51与第三密封壁52连接。
所述第三密封壁上设有支撑筋，所述支撑筋与所述膜元件本体10的端面抵接。在一实施例中，支撑筋的数量为多个，并沿着第二端盖50的周向间隔排布。为使得支撑效果更好，一实施例中，多个支撑筋包括第一支撑筋521和第二支撑筋522，第一支撑筋521的数量为多个，并沿着第二端盖50的周向间隔排布。第二支撑筋522可呈环形，环形的第二支撑筋522同样是沿着第二端盖50的周向延伸的。如此，膜元件本体10与第三密封壁52之间的接触力分布更加均匀。
支撑筋的设置，使得第三密封壁52和膜元件本体10的端面之间具有间隙，该间隙能够容纳更多的密封胶，从而提升第三密封壁52和膜元件本体10的端面之间的连接效果。
此外，第二端盖50上可以设置限位柱53插入到中心管20，以限制中心管20的移动。为实现纯水从第二端盖50所在的一侧流出，限位柱53上可以开设通孔23。
请结合参考图3至图5，一实施例中，所述密封紧固层为密封筒32，所述密封筒32套设在所述膜元件本体10的外侧面。
密封筒32的材质可以是塑料或不锈钢，其中塑料的成本低，不锈钢的强度高。
采用密封筒32的形式，将密封筒32直接套设在膜元件本体10外即可，安装方式简单，因此可以大大提高生产效率。
同样地，密封筒32可以将膜元件本体10的整个外侧面均包裹在内；或者，密封筒32仅将膜元件本体10的部分外侧面包裹在内。例如，密封筒32可以设置在膜元件本体10外侧面的中间区域。
具体地，所述密封筒32的两端分别与第一密封壁41和第二密封壁51拼接，而共同包裹所述膜元件的外侧面。
密封筒32的两端部可以形成台阶结构或是插槽结构，而分别供第一密封壁41和第二密封壁51插接配合，从而形成拼接的结构。或者，第一密封壁41和第二密封壁51上均可以形成台阶结构或是插槽结构，而分别供密封筒32的两端插接。或者，在密封筒32的两端部、第一密封壁41和第二密封壁51上均形成台阶结构，使得最后形成的密封层30的外侧面为光滑的表面。另外，上述中的拼接也可以是，密封筒32的两端面分别与第一密封壁41的端面和第二密封壁51的端面抵接。
所述密封层30还包括设置在所述密封紧固层和所述膜元件本体10外侧面之间的密封胶层33。本实施例中，在密封筒32和膜元件本体10外侧面之间填充密封胶而形成密封胶层33，同时，第一密封壁41和膜元件本体10外侧面之间，第二密封壁51和膜元件本体10外侧面之间均填满胶水，从而把膜元件本体10外侧面整个密封住，能够保证密封层30和膜元件本体10之间的紧密性，避免间隙的产生，从而可以防止膜元件本体10的外侧爆破。
其它实施例中，第一端盖40和膜元件本体10之间，第二端盖50和膜元件本体10之间也可采用超声焊接。
请结合参考图3、图7A、图7B和图7C，反渗透膜元件还可以包括第三端盖60，第三端盖60与第一端盖40设置在膜元件本体10的同一端，且该第三端盖60位于第一端盖40和膜元件本体10的端面之间。第三端盖60和第一端盖40之间可以共同形成多个连通口。
例如，第三端盖60的外侧和第一密封壁41的内侧之间共同形成连通口，该连通口用以供原水进入到膜元件本体10的原水进口11。第三端盖60上且靠近中心管20的位置开设有连通口，该连通口用以供废水流出。
此外，如图1所示，第三端盖60的中间区域可开设通孔以供中心管20穿过，以使纯水从中心管20的这一端流向纯水排出口76。或者，如图3所示，第三端盖60的中间区域设置有定位柱61，定位柱61插入到中心管20内，用以对中心管20进行限位。采用定位柱61的形式，该定位柱61可以将中心管20的这一端封闭，以使得纯水朝中心管20的另一端流动。当然，定位柱61上可以开设水流孔，以使得纯水从水流孔流向纯水排出口76。
此外，其它实施例中，第三端盖60的结构也可如图9、图12A和图12B所示，第三端盖60的中间区域的通孔供中心管20穿过，同时，还用以供第五端盖96安装。
请结合参考图9、图13A和图13B，反渗透膜元件还可以包括第五端盖96，第五端盖96与第一端盖40设置在膜元件本体10的同一端，且该第五端盖96位于第三端盖60的内侧。第三端盖60和五端盖96之间可以共同形成多个连通口。其中，用于定位中心管20的结构，例如，定位柱61可以形成在第五端盖96上。第三端盖60设置在第一端盖40与第五端盖96之间。
本申请还提出一种滤芯，滤芯包括壳体70和反渗透膜元件，其中，反渗透膜元件的具体结构请参见上述实施例，此处不再赘述。
请再次结合参考图1，所述壳体70具有安装腔、纯水存储腔73、原水入口74、废水排出口75和 纯水排出口76，所述原水入口74与所述原水进口11连通，所述废水排出口75与所述废水出口12连通，所述纯水排出口76与所述纯水出口连通，所述纯水存储腔73与所述纯水出口连通；所述反渗透膜元件位于所述安装腔内。
壳体70大体呈圆筒状，壳体70与反渗透膜元件两者之间大体同轴设置。壳体70包括筒体71和第四端盖72，筒体71的一端闭合，另一端敞口，第四端盖72盖合筒体71的敞口。第四端盖72上设置有原水入口74、废水排出口75和纯水排出口76。第一端盖40和第三端盖60上所形成的多个连通口依次将原水入口74与原水进口11连通、废水排出口75和废水出口12连通，纯水排出口76和纯水出口连通。
壳体70内除安装腔以外的空间可构成纯水存储腔73。例如，纯水存储腔73可以位于壳体70的端部，或者，纯水存储腔73位于壳体70的周侧。至少地，该纯水存储腔73位于反渗透膜元件外，纯水从中心管20的端部流出后，再流向纯水存储腔73。
对于传统的滤芯，当原水端压力断开后，滤芯内不可避免会有部分废水无法排出，由于原水压力的下降，因此这部分废水会逐渐朝纯水侧渗透，导致停机后留存的纯水中的TDS值较高。当重新开机后，滤芯先排出的纯水即首杯水大部分为上一次停机后留存的纯水。可想而知，首杯水的TDS值是很高的。
针对此，本申请滤芯中，纯水存储腔73内始终存储有部分纯水，纯水存储腔73的设置，使得净水器停机后，整个滤芯内留存的纯水的量大大增加。因此在停机后即使出现废水朝纯水侧渗透的现象，这部分渗透到纯水侧的废水与较大量的纯水混合后，也会被大量纯水所稀释，使得单位体积的纯水所含有的有害物质的量大大减少，即留存的纯水中的TDS值较低。在再次开机后，这部分存储在纯水存储腔73内的纯水会流向纯水排出口76，并与重新制备的纯水混合，使得首杯水(指的是前8杯水，每杯水定义200ml)的浓度得到稀释，从而大大降低首杯水的TDS值。
另外，由于滤芯中的膜元件本体10，其整个外侧面均是被密封层30所密封住的，密封层30能够保证整个反渗透膜元件具有足够的强度以及保证密封性，使纯废水不串水，同时可以防止原水和纯水间的压力差(6～12公斤)，从而实现了纯水存储腔73的设置。相对于传统的额外设置水罐来反向冲洗膜元件本体10而言，本申请实施例中的方案无需增加其他设备，就可以对首杯水实现TDS值的降低。
一实施例中，所述纯水存储腔73包括端部存储腔731，所述端部存储腔731位于所述第二端面14和所述壳体70的壁面之间。该实施例中，中心管20插入到端部存储腔731内，或者，中心管20的端部与端部存储腔731对接。
端部存储腔731的结构具有多种，请结合参考图1至图4，一实施例中，所述第二端面14和所述壳体70的壁面间隔设置，该间隔构成所述端部存储腔731。该实施例中，壳体70的壁面指的是面向第二端面14的表面。为实现第二端面14与壳体70壁面之间间隔，第二端盖50上可以设置有支撑凸起54，支撑凸起54与壳体70面向第二端面14的表面抵接。当然，壳体70面向第二端面14的表面也可设置安装凸起，该安装凸起抵接在第二端面14。或者，如图11A所示，第二端盖50上可以设置引流槽55，引流槽55能够容纳纯水。另外，在设置环形存储腔732的实施例中，引流槽55还能够将纯水引流至环形存储腔732。
或者，请结合参考图5，一实施例中，所述壳体70面向所述第二端面14的壁面开设有凹槽，该凹槽构成所述端部存储腔731。该实施例中，第二端面14可与壳体70面向第二端面14的壁面接触，则端部存储腔731为该壁面上开设的凹槽。或者，第二端面14可与壳体70面向第二端面14的壁面间隔，该间隔和凹槽共同构成端部存储腔731。
为能够进一步增大纯水存储腔73的容积，一实施例中，所述纯水存储腔73还包括环形存储腔732，所述环形存储腔732与所述端部存储腔731连通，所述膜元件本体10的外侧面与所述壳体70的壁面之间具有环形间隙，该环形间隙构成所述环形存储腔732。如此，由于滤芯外圈为纯水，所以可以充分利用滤芯空间，最大化膜面积，实现单芯膜元件性能的提升。同时，环形存储腔732和端部存储腔731的设置，使得整个反渗透膜元件基本上被浸泡在纯水中，对反渗透膜的寿命有提升作用。并且，环形存储腔732和端部存储腔731共同存储纯水，实现了纯水水量的大幅度上升，有效实现了首杯水的稀释降低。
此外，需要说明的是，工业膜上，由于应用场景压力过大(海水膜最大80公斤压力)，若采用膜元件本体10外侧面密封的方式，该工艺端面进水防止膜元件爆裂，此压力的存在是一种剪切压力。而在本申请的家用膜上，由于进水放水的不同，反渗透膜元件外面是纯水，膜表面是废水，这个力是一个垂直力，采用此工艺是为了防止纯水与原水间出现大压力差(预计0-12公斤左右)而导致串水。
关于纯水的水路具有多种，以下通过四个实施例进行具体说明，但不限于此：
请结合参考图1、图2和图5，一实施例中，所述中心管20的两端贯通，所述纯水排出口76靠近所述第一端面13设置，所述中心管20靠近所述第一端面13的一端与所述纯水排出口76连通，所述中心管20靠近所述第二端面14的一端与所述纯水存储腔73连通。
请结合参考图1和图2，以纯水存储腔73同时具有端部存储腔731和环形存储腔732为例，该实施例中，环形存储腔732靠近第二端面14的一端是敞口的，并与端部存储腔731连通，而环形存储腔732靠近第一端面13的一端是闭合的，从而确保纯水存储腔73仅具有与中心管20的连通口，可以阻止纯水从靠近第一端面13的一端流走，保证了纯水存储腔73的储水功能。
其中，第一端盖40的第一密封壁41可以与壳体70的内壁密封抵接，从而实现环形存储腔732靠近第一端面13的一端闭合。或者，也可以在第一密封壁41上或是壳体70的内壁上设置密封环筋，实现环形存储腔732靠近第一端面13的一端闭合。
以纯水存储腔73具有端部存储腔731为例，该实施例中，端部存储腔731的外侧是密封的，此处的外侧指的靠近壳体70内侧面的一侧，从而确保纯水存储腔73仅具有与中心管20的连通口，可以阻止纯水从其它位置流出。
具体而言，当开机时，纯水流入到中心管20，大部分纯水从中心管20靠近第一端面13的一端流向壳体70上的纯水排出口76，并排出到滤芯外供用户使用。其余的小部分纯水则从中心管20靠近第二端面14的一端流向端部存储腔731和环形存储腔732，在这个过程中，这部分纯水能够将纯水存储腔73内的气体进行压缩。
请结合参考图2，在停止进原水后，纯水排出口76关闭，原水端压力断开，纯水存储腔73内的纯水在压缩气体反向压力作用下，可以反向冲洗膜元件本体10，从而将废水从废水排出口75挤出，如此可以减少滤芯内的废水量，从而进一步减少了废水交换量，使得滤芯内部尽快达到浓度平衡。同时，纯水存储腔73内对膜元件本体10反向冲洗后剩余的纯水还能够对首杯水进行稀释。从而进一步提升首杯水效果，实现大通量水真正的鲜活水。
假如整个滤芯中加入400ml纯水(壳体70内径92mm，反渗透膜元件外径79mm，反渗透膜元件高度h＝230mm，则V＝S*h＝π(46*46-39.5*39.5)*230约等于400ml，根据经验滤芯废水抽出约650ml，不接后置首杯水tds值在80左右(原水的TDS值在100)，假若纯水与原水互换(忽略中心管20中的纯水)，相当于往RO膜(反渗透膜)加入纯水(纯水的TDS＝10)，则650*80+400*10＝1050*X；X＝53.3，则预测稀释效果为50％，若加上后置水的稀释(假设后置水的稀释量为200ml)，以及一代首杯水纯水回流改善(纯水稀释效果降低50％，初始70％左右)，初步预测总体首杯水的稀释效果可以至少达到80％以上。
图8为单芯首杯水对比测试效果图，从图上可以明显看出，在采用本申请实施例中的滤芯后，相对于工业4.0侧流膜而言，首杯水尤其是前面三杯水的脱盐率是逐渐升高的，而工业4.0侧流膜首杯水尤其是前面三杯水的脱盐率是逐渐下降的。由此可知，本申请实施例中的滤芯能够有效降低首杯水的TDS值。
一实施例中，所述中心管20的两端贯通，所述纯水排出口76靠近所述第一端面13设置，所述中心管20靠近所述第一端面13的一端与所述纯水排出口76连通，所述中心管20靠近所述第二端面14的一端与所述纯水存储腔73连通。
请结合参考图5，以纯水存储腔73同时具有端部存储腔731和环形存储腔732为例，该实施例中，环形存储腔732靠近第二端面14的一端是敞口的，并与端部存储腔731连通，而环形存储腔732靠近第一端面13的一端同样也是敞口的，在壳体70和第一密封壁41之间形成有水流通道77，该水流通道77分别连通环形存储腔732和纯水排出口76。
具体地，膜元件本体10制得的纯水流入到中心管20，其中一部分纯水从中心管20靠近第一端面13的一端流向纯水排出口76；另一部分纯水从中心管20靠近第二端面14的一端流向端部存储腔731和环形存储腔732，然后再经由水流通道77流向纯水排出口76。
本实施例中，中心管20两端均出纯水，可以降低纯水侧的压力，实现纯水的快速制备，提高出水速度。
请结合参考图3和图4，一实施例中，所述中心管20靠近所述第一端面13的一端封闭，所述中心管20靠近所述第二端面14的一端导通，所述纯水排出口76靠近所述第一端面13设置，所述纯水存储腔73与所述纯水排出口76连通。
具体地，中心管20具有第一管段21和第二管段22，第一管段21靠近第一端面13，第二管段22则靠近第二端面14，第二管段22上开设有通孔23，第一管段21和第二管段22之间通过隔板24隔开，纯水从第二管段22上的通孔23流向纯水排出口76，第一管段21内则无纯水排出。当然，其它实施例中，中心管20靠近所述第一端面13的一端封闭可以指的是，中心管20的端面闭合。
以纯水存储腔73同时具有端部存储腔731和环形存储腔732为例，该实施例中，环形存储腔732靠近第二端面14的一端是敞口的，并与端部存储腔731连通。环形存储腔732靠近第一端面13的一端同样也是敞口的，并与纯水排出口76连通。
具体而言，当开机时，纯水流入到中心管20，所有的纯水从中心管20靠近第二端面14的一端，例如从第二管段22流向端部存储腔731和环形存储腔732，并最终从壳体70上的纯水排出口76排出到滤芯外供用户使用。相当于从中心管20流出的纯水经由端部存储腔731和环形存储腔732绕壳体70一圈后，再从纯水排出口76排出。
当停机时，纯水排出口76关闭，如此纯水存储腔73内会始终预留有纯水，这部分纯水能够与废水渗透过来的一些物质进行混合，对其进行稀释，如此当再次开机时，活得的首杯水的TDS值大大降低。
请结合参考图3，此外，中心管20的第一管段21还可以与废水出口12连通，从膜元件本体10端面(可以是第一端面13所在的一侧，也可以是第二端面14所在的一侧)上流出的废水，能够流入到第一管段21，并从中心管20靠近第一端面13的一端流向壳体70的废水排出口75。
请结合参考图4，当然，中心管20靠近第一端面13的一端可以通过第三端盖60上的定位柱61封堵，废水从膜元件本体10端面流出后，也可直接从第一端盖40、第二端盖50或是第三端盖60上的开口流出。
请结合参考图14和图15，一实施例中，所述中心管20的两端贯通，所述纯水排出口76靠近第一端面13设置，所述中心管20靠近所述第一端面13的一端与所述纯水排出口75连通，所述中心管20靠近第二端面14的一端分别与所述膜元件本体10的纯水出口和所述纯水存储腔73连通。
该实施例中，滤芯可以是复合滤芯，并包括第一过滤组80，第一过滤组80设置在膜元件本体10与中心管20之间的环形间隙内。第一过滤组80包括内管81和第一过滤元件82，内管81将环形间隙分隔为内腔和外腔85，其中，内管81的内部为内腔，第一过滤元件82则安装在内腔，并且第一过滤元件82环绕中心管20设置，两者间隔形成第一出水间隙84。第一过滤元件82与内管81之间同样间隔设置，以形成第一进水间隙83。
其中，膜元件本体10为RO膜，第一过滤元件82为PAC滤芯。
上述组合的膜元件本体10和第一过滤组80，在满足复合滤芯过滤要求的情况下，占用空间最小，可以最大程度的提升壳体70内部空间的利用效率，有利于缩小复合滤芯的体积，为用户使用提供了方便。
具体地，原水进入第一进水间隙83，沿第一过滤元件82的径向流动，经过第一过滤元件82过滤后进入第一出水间隙84，然后从第一出水间隙84流出。接着，水流从膜元件本体10端面的原水进口进入，经过膜元件本体10过滤后，废水从废水出口排出，纯水从纯水出口流出到外腔85。然后一部分纯水从中心管20的其中一个端部流入中心管20，并从另一端部流向纯水排出口76；另一部分纯水则直接流向纯水存储腔73。
滤芯还包括骨架93，骨架93呈筒状，膜元件本体10绕设在骨架93上，第一过滤组80位于骨架93内，并与骨架93之间间隔设置，该间隔即为外腔85。骨架93的周壁开设有多个过水孔，以供膜元件本体10排出的纯水流入到骨架93内部。
骨架93大体呈一端敞口，另一端闭合的结构，即骨架93的一端为敞口端，另一端设置有盖板94。其中，骨架93的敞口端用于供第一过滤组80安装，该敞口端能够与第一过滤组80密封连接，或是与其它结构密封连接，避免水流从敞口端进出。第一过滤组80的端部与骨架93的盖板94之间间隔设置而形成纯水腔，中心管部分伸入到纯水腔内，或者中心管未伸入到纯水腔。
此外，滤芯还包括第二过滤组90，第二过滤组90设置在纯水腔内，同样地，第二过滤组90可以环绕中心管设置，将纯水腔隔设为第二进水间隙91和第二出水间隙92，第二进水间隙91位于第二过滤组90外周，第二出水间隙92位于第二过滤组90内周。
第二过滤组90具体可以采用活性炭过滤结构。
骨架93的盖板94上开设有出水孔95，出水孔95将第二出水间隙92和纯水存储腔连通。
具体地，外腔85内的纯水能够流入到第二进水间隙91内，纯水经过第二过滤组90过滤后，流入第二出水间隙92。其中，一部分纯水从中心管的端部进入到中心管，并从中心管20的另一端流出到纯水排出口。另一部分纯水则从骨架93上的出水孔95流入到纯水存储腔73内。
本申请还提出一种净水器，所述净水器包括滤芯，滤芯的结构请参见上述实施例，此处不再赘述。
以上仅为本申请的可选实施例，并非因此限制本申请的专利范围，凡是在本申请的发明构思下，利用本申请说明书及附图内容所作的等效结构变换，或直接/间接运用在其他相关的技术领域均包括在本申请的专利保护范围内。

Claims (18)

  1. 一种反渗透膜元件，其中，包括：
    膜元件本体，卷设呈筒状，所述膜元件本体的内侧面具有纯水出口，所述膜元件本体的端面具有原水进口和废水出口；以及，
    密封层，包覆于所述膜元件本体的外侧面，并将所述膜元件本体的外侧面密封。
  2. 根据权利要求1所述的反渗透膜元件，其中，所述密封层包括密封缠绕条，所述密封缠绕条缠绕在所述膜元件本体的外侧面。
  3. 根据权利要求2所述的反渗透膜元件，其中，所述密封缠绕条为玻璃纤维；和/或，
    所述密封层还包括密封胶层，所述密封胶层连接相邻的所述密封缠绕条、以及连接所述密封缠绕条和所述膜元件本体。
  4. 根据权利要求2所述的反渗透膜元件，其中，所述膜元件本体的一端设有第一端盖，另一端设有第二端盖，所述第一端盖具有环设在所述膜元件本体外侧面的第一密封壁，所述第二端盖具有环设在所述膜元件本体外侧面的第二密封壁；
    所述第一密封壁、所述第二密封壁和所述密封缠绕条共同密封包裹所述膜元件本体的外侧面。
  5. 根据权利要求4所述的反渗透膜元件，其中，所述膜元件本体的外侧面缠绕有多层所述密封缠绕条；
    其中，所述第一密封壁和所述第二密封壁均设置在相邻的两层所述密封缠绕条之间；或者，所述第一密封壁和所述第二密封壁均设置在所述密封缠绕条与所述膜元件本体之间。
  6. 根据权利要求5所述的反渗透膜元件，其中，所述第一密封壁开设有第一容胶孔，所述密封缠绕条密封缠绕所述第一容胶孔；和/或，
    所述第二密封壁开设有第二容胶孔，所述密封缠绕条密封缠绕所述第二容胶孔。
  7. 根据权利要求4所述的反渗透膜元件，其中，所述第一端盖还设有限位环槽，所述限位环槽沿所述第一密封壁的周向延伸，所述限位环槽内绕设有所述密封缠绕条。
  8. 根据权利要求7所述的反渗透膜元件，其中，所述第一端盖还具有连接壁和限位壁，所述限位壁面向所述膜元件本体的端面，所述连接壁和所述第一密封壁分别连接所述限位壁，并沿相反反向延伸，所述连接壁上设有所述限位环槽。
  9. 根据权利要求1所述的反渗透膜元件，其中，所述密封层包括密封筒，所述密封筒套设在所述膜元件本体的外侧面。
  10. 根据权利要求9所述的反渗透膜元件，其中，所述密封筒的两端分别与第一密封壁和第二密封壁拼接，而共同包裹所述膜元件的外侧面；和/或，
    所述密封层还包括设置在所述密封筒和所述膜元件本体外侧面之间的密封胶层。
  11. 根据权利要求1所述的反渗透膜元件，其中，所述膜元件本体的一端设有第二端盖，所述第二端盖具有第三密封壁，所述第三密封壁与所述膜元件本体的端面之间通过密封胶密封粘接；并且所述第三密封壁上设有支撑筋，所述支撑筋与所述膜元件本体的端面抵接。
  12. 根据权利要求1至11任意一项所述的反渗透膜元件，其中，所述原水进口和废水出口位于所述膜元件本体的同一端面。
  13. 一种滤芯，其中，包括壳体和如权利要求1-12任意一项所述的反渗透膜元件；
    所述壳体具有安装腔、纯水存储腔、原水入口、废水排出口和纯水排出口，所述原水入口与所述原水进口连通，所述废水排出口与所述废水出口连通，所述纯水排出口与所述纯水出口连通，所述纯水存储腔与所述纯水出口连通；所述反渗透膜元件位于所述安装腔内。
  14. 根据权利要求13所述的滤芯，其中，所述反渗透膜元件具有相对的第一端面和第二端面，所述纯水存储腔包括端部存储腔，所述端部存储腔位于所述第二端面和所述壳体的壁面之间。
  15. 根据权利要求14所述的滤芯，其中，所述第二端面和所述壳体的壁面间隔设置，该间隔构成所述端部存储腔；或者，
    所述壳体面向所述第二端面的壁面开设有凹槽，该凹槽构成所述端部存储腔。
  16. 根据权利要求14所述的滤芯，其中，所述纯水存储腔还包括环形存储腔，所述环形存储腔与所述端部存储腔连通，所述膜元件本体的外侧面与所述壳体的壁面之间具有环形间隙，该环形间隙构成所述环形存储腔。
  17. 根据权利要求13至16任意一项所述的滤芯，其中，所述滤芯还包括中心管，所述膜元件本体环绕所述中心管卷设而呈筒状；
    其中，所述中心管的周壁开设有通孔而连通所述纯水出口；所述中心管的两端贯通，所述纯水排 出口靠近第一端面设置，所述中心管靠近所述第一端面的一端与所述纯水排出口连通，所述中心管靠近第二端面的一端与所述纯水存储腔连通；或者，
    所述中心管的周壁开设有通孔而连通所述纯水出口；所述中心管靠近所述第一端面的一端封闭，所述中心管靠近所述第二端面的一端导通，所述纯水排出口靠近所述第一端面设置，所述纯水存储腔与所述纯水排出口连通；或者，
    所述中心管的两端贯通，所述纯水排出口靠近第一端面设置，所述中心管靠近所述第一端面的一端与所述纯水排出口连通，所述中心管靠近第二端面的一端分别与所述膜元件本体的纯水出口和所述纯水存储腔连通。
  18. 一种净水器，其中，所述净水器包括如权利要求13-17任意一项所述的滤芯。
PCT/CN2020/138217 2020-03-21 2020-12-22 反渗透膜元件、滤芯和净水器 WO2021190002A1 (zh)

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CN115888395A (zh) * 2022-08-31 2023-04-04 广东领尚净水科技有限公司 一种净水水路系统及滤芯结构
CN115888395B (zh) * 2022-08-31 2023-12-12 广东领尚净水科技有限公司 滤芯结构

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