CN217838538U - Water purifier filter element and water purifier - Google Patents

Abstract

The utility model relates to a water purification technology field provides a water purifier filter core and water purifier. The filter element of the water purifier comprises a fresh-keeping bin assembly, a central tube assembly and a filter element assembly, wherein the filter element assembly is arranged in the cavity and comprises a filter membrane component and at least two different filter components; the clamping parts of the filtering membrane components are clamped between two adjacent central pipes along the length direction of the central pipes, the filtering components are arranged between two adjacent filtering parts of the filtering membrane components, and the filtering parts and the filtering components of the filtering membrane components are wound on the periphery of the central pipe assembly. Because the filtering parts arranged between the two adjacent filtering parts of the filtering membrane part are different, the water quality output to the central tube after filtering is different, and the purpose that a core outputs various water qualities is realized; because improve through the filter core structure and realize exporting different quality of water, need not to realize quality of water through a plurality of filter cores and adjust, reduced the quantity of filter core, effectively reduced the volume of water purifier, simplified the structure of water purifier.

Description

Water purifier filter element and water purifier

Technical Field

The utility model relates to a water purification technical field especially relates to a water purifier filter core and water purifier.

Background

The main stream of the household water purification market is the reverse osmosis water purifier at present, the reverse osmosis water purifier is deeply loved by users due to extremely high filtering precision and long service cycle, the market proportion reaches over 90 percent, and along with the further pursuit of people for healthy water, the water quality can be adjusted to be expected to become a new trend in the future, and water with different water qualities is used in different life scenes, so that the better life quality is achieved.

At present, the mainstream water quality adjusting mode mainly comprises two filter elements with different filtering precision, and water quality adjustment is carried out on the outside.

SUMMERY OF THE UTILITY MODEL

The present invention aims to solve at least one of the technical problems existing in the related art. Therefore, the utility model provides a water purifier filter core for there is bulky and the complicated problem of structure in solving the water quality adjusting device in the correlation technique.

The utility model discloses still provide a water purifier.

According to the utility model discloses water purifier filter core of first aspect embodiment includes:

the fresh-keeping bin assembly is internally provided with a cavity, and the fresh-keeping bin assembly is provided with a first water inlet;

the central pipe assembly is arranged in the cavity and comprises at least two central pipes, and water inlet holes are formed in the pipe walls of the central pipes;

a filter element assembly disposed within the cavity, the filter element assembly comprising a filter membrane component and at least two different filter components; the clamping parts of the filtering membrane components are clamped between two adjacent central pipes along the length direction of the central pipes, the filtering components are arranged between two adjacent filtering parts of the filtering membrane components, and the filtering parts of the filtering membrane components and the filtering components are wound on the periphery of the central pipe assembly.

According to the filter element of the water purifier provided by the embodiment of the utility model, because the filtering parts arranged between the two adjacent filtering parts of the filtering film part are different, the water quality output to the central tube after filtering is different, and the purpose that one core outputs multiple water qualities is realized; because the filter element structure is improved to output different water qualities, the water quality adjustment is not required to be realized through a plurality of filter elements, the number of the filter elements is reduced, the volume of the water purifier is effectively reduced, and the structure of the water purifier is simplified.

According to an embodiment of the present invention, the central tube assembly comprises a first central tube and a second central tube, the middle part of the filtering membrane component forms the clamping portion, and the two ends of the filtering membrane component form a first filtering portion and a second filtering portion connected with the clamping portion; the clamping portion is clamped between the first center pipe and the second center pipe.

According to the utility model discloses an embodiment, first filter house deviates from one side of first center tube is provided with first pure water and leads the cloth, first pure water is led the cloth and is close to the one end centre gripping of second center tube in the second center tube with between the clamping part.

According to the utility model discloses an embodiment, the filter core includes first filter component and second filter component, first filter component is located first pure water lead deviates from one side of first filter house, second filter component is located the second filter house deviates from one side of first pure water lead.

According to the utility model discloses an embodiment, first filter unit includes first filtration membrane, first filter screen, second pure water cloth guide, second filtration membrane, second filter screen and third pure water cloth guide, the fifty percent discount first filtration membrane set up in first pure water cloth guide deviates from one side of first filter portion, first filter screen centre gripping in between the first filtration membrane, second pure water cloth guide set up in first filtration membrane deviates from one side of first pure water cloth guide, the fifty percent discount second filtration membrane set up in second pure water cloth guide deviates from one side of first filtration membrane, second filter screen centre gripping in between the second filtration membrane, third pure water cloth guide set up in second filtration membrane deviates from one side of second pure water cloth guide.

According to an embodiment of the invention, the side of second pure water lead respectively with the side of first filtration membrane and the side of second filtration membrane is connected, the side of third pure water lead respectively with the side of second filtration membrane and the side of second filter house is connected.

According to the utility model discloses an embodiment, the second filter component includes fourth pure water cloth guide, third filtration membrane, third filter screen, fifth pure water cloth guide, fourth filtration membrane and fourth filter screen, fourth pure water cloth guide set up in the second filter portion deviates from one side of third pure water cloth guide, the fifty percent discount third filtration membrane set up in fourth pure water cloth guide deviates from one side of second filter portion, third filter screen centre gripping in between the third filtration membrane, fifth pure water cloth guide set up in third filtration membrane deviates from one side of fourth pure water cloth guide, the fifty percent discount fourth filtration membrane set up in fifth pure water cloth guide deviates from one side of third filtration membrane, fourth filter screen centre gripping in between the fourth filtration membrane.

According to an embodiment of the present invention, the side of the fourth pure water guide is connected to the side of the third filtration membrane and the side of the second filtration section, respectively, and the side of the fifth pure water guide is connected to the side of the third filtration membrane and the side of the fourth filtration membrane, respectively.

According to the utility model discloses an embodiment, fourth filtration membrane with be provided with sixth pure water between the first filter house and lead the cloth, sixth pure water lead the cloth first end with first center tube is connected, sixth pure water lead the cloth the second end twine in the outer peripheral face of filter element group spare.

According to the utility model discloses an embodiment, the filtering membrane part include the fifth filter screen and set up respectively in the fifth filter membrane and the sixth filtration membrane of fifth filter screen both sides, first filtering component with the fifth filtration membrane is located one side of fifth filter screen, the sixth filtration membrane with the second filtering component is located the opposite side of fifth filter screen.

According to the utility model discloses an embodiment, first filtration membrane second filtration membrane and the material of fifth filtration membrane is the same, third filtration membrane fourth filtration membrane and the material of sixth filtration membrane is the same.

According to the utility model discloses an embodiment, the both ends of filter element group spare and the outer peripheral face of filter element group spare all with the sealed cooperation of inner wall of fresh-keeping storehouse subassembly.

According to the utility model discloses an embodiment still includes:

the fresh-keeping bin assembly is arranged in the shell, the first water inlet is communicated with the water inlet port, and the water outlet ports are communicated with the first ends of the central pipes in a one-to-one correspondence manner; the fresh-keeping bin component is provided with a first water outlet which is communicated with the waste water port.

According to the utility model discloses the water purifier of second aspect embodiment, including casing and above-mentioned arbitrary one the water purifier filter core, the filter core set up in the casing.

The embodiment of the utility model provides an in above-mentioned one or more technical scheme, one of following technological effect has at least:

according to the filter element of the water purifier provided by the embodiment of the utility model, because the filter elements arranged between the two adjacent filter parts of the filter element are different, the water quality output to the central tube after filtration is different, and a core can output a plurality of water qualities; because the filter element structure is improved to output different water qualities, the water quality adjustment is not required to be realized through a plurality of filter elements, the number of the filter elements is reduced, the volume of the water purifier is effectively reduced, and the structure of the water purifier is simplified.

Furthermore, according to the water purifier provided by the embodiment of the utility model, a plurality of water qualities can be output by one core; the quantity of the filter elements is reduced, the volume of the water purifier is effectively reduced, the structure of the water purifier is simplified, and the competitiveness of the product is enhanced.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention or the related art, the drawings required to be used in the description of the embodiments or the related art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a schematic side view, sectional structural diagram of a filter element provided in an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the enlarged structure at A in FIG. 1;

fig. 3 is a schematic structural diagram of a cover body according to an embodiment of the present invention;

FIG. 4 is a schematic diagram illustrating a rolling process of a filter element assembly according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a fresh-keeping bin assembly provided by the embodiment of the present invention.

Reference numerals:

10. a filter element assembly; 11. a clamping part; 12. a first filter unit; 13. a second filter unit; 14. fifthly, filtering by a filter screen; 15. a fifth filtration membrane; 16. a sixth filtration membrane; 17. a filtration membrane component; 20. a first filter element; 21. a first pure water guide cloth; 22. a first filter membrane; 23. a first filter screen; 24. second pure water guiding; 25. a second filter membrane; 26. a second filter screen; 27. third pure water cloth guiding; 30. a second filter element; 31. fourth pure water cloth guiding; 32. a third filtration membrane; 33. a third filter screen; 34. fifth pure water cloth guiding; 35. a fourth filtration membrane; 36. a fourth filter screen; 37. sixth pure water cloth guiding; 40. a central tube assembly; 41. a first center tube; 42. a second center tube; 50. a housing; 51. a housing main body; 52. a cover body; 53. a water inlet port; 54. a waste water port; 55. a water outlet port; 56. a water storage cavity; 61. a fresh-keeping bin body; 62. a first end cap; 63. a second end cap; 64. a first water inlet; 65. a flexible connector; 70. a waterway conversion component; 71. a mounting cavity; 72. a wastewater flow channel; 73. a water inlet flow passage; 74. and a water outlet flow passage.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the drawings and examples. The following examples are provided to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description of the embodiments and for simplicity of description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Moreover, various embodiments or examples and features of various embodiments or examples described in this specification can be combined and combined by one skilled in the art without being mutually inconsistent.

Fig. 1 illustrates a schematic side view cross-sectional structural diagram of a filter element provided in an embodiment of the present invention, and fig. 2 illustrates a schematic partially enlarged structural diagram of a position a in fig. 1, as shown in fig. 1 and fig. 2, the filter element of the water purifier includes a fresh keeping bin assembly, a center tube assembly 40 and a filter element assembly 10, a cavity is formed inside the fresh keeping bin assembly, and a first water inlet 64 is formed in the fresh keeping bin assembly. The central tube assembly 40 is disposed in the cavity, and the central tube assembly 40 includes at least two central tubes, and water inlets are formed on the walls of the central tubes. The filter element assembly 10 is arranged in the cavity, and the filter element assembly 10 comprises a filter membrane part 17 and at least two different filter parts; the clamping part 11 of the filtering membrane part 17 is clamped between two adjacent central pipes along the length direction of the central pipes, the filtering membrane part is arranged between two adjacent filtering parts of the filtering membrane part 17, and the filtering part and the filtering component of the filtering membrane part 17 are wound on the outer periphery of the central pipe assembly 40.

According to the filter element of the water purifier provided by the embodiment of the utility model, because the filter elements arranged between the two adjacent filter parts of the filter element 17 are different, the water quality output to the central tube after filtration is different, and a core can output a plurality of water qualities; because the filter element structure is improved to output different water qualities, the water quality adjustment is not required to be realized through a plurality of filter elements, the number of the filter elements is reduced, the volume of the water purifier is effectively reduced, and the structure of the water purifier is simplified.

It will be appreciated that the housing 50 is formed with an inlet port 53 and at least two outlet ports 55. The fresh food compartment assembly is disposed within the housing 50 with the first water inlet 64 communicating with the water inlet port 53. The first ends of the center tubes are in one-to-one correspondence with the outlet ports 55.

It will be appreciated that to address the issue of the first cup of water, a water storage chamber 56 is formed between the crisper module and the housing 50 adapted to store water, wherein a second end of a central tube communicates with the water storage chamber 56.

According to the utility model discloses the filter core, as shown in fig. 1, set up fresh-keeping storehouse subassembly through the outside at filter element subassembly 10, form water storage chamber 56 between fresh-keeping storehouse subassembly and casing 50, and make the second end and the water storage chamber 56 intercommunication of one of them center tube, the water purifier in-process can enter into water storage chamber 56 through the partial pure water after filter element subassembly 10 filters and save, when shutting down, the pure water is closed, raw water end pressure disconnection, the pure water descends slowly under the atmospheric pressure effect, discharge partial waste water through first delivery port, reduce and waste water exchange capacity, reach concentration balance as early as possible. After the machine is started next time, pure water in the water storage cavity 56 is output through the first end of the central pipe and the water outlet port 55 in sequence under the action of pressure, so that the problem of the first cup of water is effectively solved. The fresh-keeping bin component has a simple structure, so that the fresh-keeping bin component has extremely high stability; because the water storage cavity 56 and the fresh-keeping bin component are integrated in the filter element, the volume of the water purifier is effectively reduced.

It will be appreciated that both ends of the filter element assembly 10 and the outer peripheral surface of the filter element assembly 10 are in sealing engagement with the interior wall of the fresh food compartment assembly. Raw water enters the fresh-keeping bin assembly through the first water inlet 64, and then is in sealing fit with the inner wall of the fresh-keeping bin assembly, so that part of raw water can only flow to the second end of the filter element assembly 10 along the length direction of the filter element assembly 10, and meanwhile, part of raw water flows into the central pipe along the radial direction of the filter element assembly 10.

It should be noted that the filter cartridge assembly 10 is sealed with the inner wall of the fresh food compartment assembly by adhesive connection, but other connection methods can be used.

It will be appreciated that the housing 50 is also formed with a waste water port 54, the crisper module being disposed inside the housing 50, the crisper module being formed with a first water outlet, the first water outlet being in communication with the waste water port 54.

It will be appreciated that, as shown in fig. 1, the housing 50 includes a housing main body 51 and a cover 52, the housing main body 51 is a cylindrical cylinder, the housing 50 is hollow, and the housing 50 is used for accommodating the filter element assembly 10. Of course, the shape of the housing 50 is not limited thereto, and may be a cylinder having a cross section of a regular polygon, which is determined according to the shape of the filter element assembly 10. An opening is formed at a first end of the housing main body 51, the cover 52 covers the opening, and the cover 52 and the housing main body 51 form a closed space. A water inlet port 53, a waste water port 54, and a water outlet port 55 are formed in the cover 52.

Fig. 3 illustrates a schematic structural diagram of the cover body provided in the embodiment of the present invention, as shown in fig. 3, two water inlet ports 53, a waste water port 54 and two water outlet ports 55 are formed on the cover body 52 for facilitating connection with an external pipeline. The inlet port 53, waste port 54 and outlet port 55 are arranged side by side to facilitate connection with a pipeline.

It can be understood that because the problem of the first cup of water is solved by generally adopting pure water backflow, double-film mutual flushing and water-driven tank flushing in the related art, although a certain effect is obtained, the problems of more waste water, large noise, large whole machine volume and complex and unreliable system exist. Although theoretically, the above problems could be solved by improving the RO filter cartridge, there are several difficulties: firstly, the internal space of the reverse osmosis membrane filter element is extremely small, and conventional sealing is extremely difficult to perform; secondly, in the reverse osmosis operation process, a higher pressure fluctuation exists, and common materials cannot bear the higher pressure; thirdly, the colloid of the sealed fresh-keeping bin is required to be high, and food-grade environment-friendly colloid is required. Fourth, higher reliability is necessary. Therefore, the utility model discloses a filter core is provided with fresh-keeping storehouse subassembly in filter element group spare 10 outside, can effectively solve above-mentioned problem.

Fig. 5 illustrates the structural schematic diagram of the fresh-keeping bin assembly provided by the embodiment of the present invention, as shown in fig. 1 and fig. 5, the fresh-keeping bin assembly comprises a fresh-keeping bin body 61, a first end cap 62 and a second end cap 63, the filter element assembly 10 is sleeved on the fresh-keeping bin body 61, and the inner wall of the fresh-keeping bin body 61 is in sealing fit with the outer peripheral surface of the filter element assembly 10 to prevent streaming between the fresh-keeping bin body 61 and the outer peripheral surface of the filter element assembly 10. The inner wall of the fresh-keeping bin body 61 and the outer peripheral surface of the filter element assembly 10 can be connected through gluing, and can also be matched in a sealing way through other modes.

The first end cap 62 is disposed at the first end of the fresh-keeping bin body 61, and the first end cap 62 is respectively matched with the first end of the filter element assembly 10 and the fresh-keeping bin body 61 in a sealing manner. The first end cover 62 can have the multiple with the sealed complex mode of the first end of filter element group spare 10, can be sealed through gluing, also can be through setting up annular protruding stupefied in first end cover 62 towards one side of filter element group spare 10, realizes sealed cooperation through the first end of the protruding stupefied embedding filter element group spare 10 of annular.

First end cover 62 still with the sealed cooperation of the first end of fresh-keeping storehouse body 61, first end cover 62 adopts sticky the sealing with fresh-keeping storehouse body 61, at the in-process that uses the fresh-keeping storehouse body 61 of glass fiber preparation, twines in first end cover 62 through the part glass fiber who will impregnate in the glue, treat after the glue solidification, alright pass through adhesive bonding with glass fiber and first end cover 62 to realize the sealed between first end cover 62 and the fresh-keeping storehouse body 61.

The center of first end cover 62 is formed with the mounting hole, and first water inlet 64 is located the outward flange of first end cover 62, and the raw water gets into filter element group spare 10 through setting up in the first water inlet 64 of outward flange, can increase the raw water at filter element group spare 10 radial ascending flow distance, has strengthened the purifying effect of filter core. In order to increase the water inflow of the first water inlet 64, the first water inlet 64 is provided as a ring-shaped water inlet. The first end cover 62 is formed with a first water outlet, and the first water outlet is located the position that the first end cover 62 opened into the mounting hole, and the first water outlet arranges around the mounting hole, and the first water outlet is annular water outlet. Of course, the first water outlet can also be a plurality of independent strip-shaped or round water outlets, and the first water outlets are arranged on the periphery of the mounting hole at equal intervals.

The second end cover 63 sets up in the second end of fresh-keeping storehouse body 61, and second end cover 63 respectively with the sealed cooperation of second end of filter element group spare 10, the sealed cooperation mode of second end cover 63 and filter element group spare 10 second end can have the multiple, can be through sticky sealed, also can be through setting up the protruding stupefied of annular in one side of second end cover 63 orientation filter element group spare 10, the second end through the protruding stupefied embedding filter element group spare 10 of annular realizes sealed cooperation. The second end cap 63 is also in sealing fit with the fresh-keeping bin body 61, and the sealing fit manner of the second end cap 63 and the fresh-keeping bin body 61 is the same as that of the first end cap 62 and the fresh-keeping bin body 61, and will not be described in detail herein. The second end cap 63 is formed with a water through hole through which the water storage chamber 56 communicates with the second end of the corresponding center pipe.

It can be understood that, as shown in fig. 5, the fresh-keeping bin body 61 includes a colloid and a flexible connecting member 65 wound around the outer peripheral surface of the filter element assembly 10, the colloid is coated on the outer peripheral surface of the filter element assembly 10, and the flexible connecting member 65 is embedded in the colloid. Because the installation space of the fresh-keeping bin body 61 is smaller, the thickness of the fresh-keeping bin body 61 needs to be very thin, the thinner the thickness of the fresh-keeping bin body 61 is, the larger the water storage amount of the water storage cavity 56 is, and the thickness of the fresh-keeping bin body 61 is 1-3mm in the embodiment. Since the fresh-keeping bin body 61 needs to withstand large pressure fluctuations during use, the fresh-keeping bin body 61 needs to have high strength. The utility model discloses the filter core is owing to fresh-keeping storehouse body 61 comprises flexible piece and colloid, under the condition that reduces fresh-keeping storehouse body 61 thickness, makes fresh-keeping storehouse still have very high intensity through the flexonics spare 65 that uses higher strength to satisfy fresh-keeping storehouse body 61's resistance to compression requirement.

It can be understood that the colloid is food-grade glue, adopts food-grade glue preparation fresh-keeping storehouse body 61, can avoid the problem that there is the peculiar smell in the pure water in the filter core, has improved the quality of drinking water, has strengthened user experience and has felt, has improved product competitiveness.

For the convenient advantage of understanding fresh-keeping storehouse body 61, the utility model also provides a manufacturing process of fresh-keeping storehouse subassembly, wherein, fresh-keeping storehouse body 61 comprises glue and flexible piece, and the major component of glue is AB glue, and the polyurethane of the preferred food level of glue is glued. The density of the A glue is 0.95-1.05g/cm ³ The density of the B glue is 1.18-1.28g/cm ³ (ii) a The viscosity of the adhesive A at the temperature of 20 ℃ is 1600-2400mPa.s, the viscosity of the adhesive B at the temperature of 20 ℃ is 30-70mPa.s, and the viscosity of the adhesive AB at the temperature of 20 ℃ is 200-600mPa.s. The curing tack-free time of the glue is 30min-1h, and the curing tack-free time refers to the time from the beginning of the curing of the glue to the curing of the surface of the glue. The pressure-bearing strength of the fresh-keeping bin body 61 is related to the performance of glue besides the strength of the flexible connecting piece 65. The curing strength of the glue in this embodiment is 5Mpa, but is not limited thereto, and is specifically selected according to actual needs.

The flexible part is made of glass fiber, the water content of the glass fiber is 0-0.05%, the combustible content of the glass fiber is 0.45-0.75%, the breaking strength of the glass fiber is more than or equal to 0.45cN/tex, and the linear density variation coefficient of the glass fiber is less than or equal to 5.0.

As shown in fig. 5, the manufacturing process of the fresh-keeping bin assembly mainly comprises the following steps:

mounting a first end cap 62 to a first end of the filter cartridge assembly 10 and a second end cap 63 to a second end of the filter cartridge assembly 10, respectively;

immersing the glass fiber into a glue groove filled with AB glue through a tool, so that the AB glue is coated on the surface of the glass fiber;

and (3) winding the glass fiber impregnated with the AB glue on the outer peripheral surface of the filter element component 10 in a reciprocating way by adopting automatic equipment while rotating and feeding the glass fiber impregnated with the AB glue from the starting point of the first end cover 62.

After the glue is cured, the preservation bin body 61 can be respectively adhered to the first end cover 62, the second end cover 63 and the outer peripheral surface of the filter element assembly 10, so that the filter element assembly 10 is sealed in the preservation bin assembly, and the pressure bearing capacity of the preservation bin assembly formed by curing can reach 5Mpa. In order to strengthen the connection between the fresh-keeping bin body 61 and the two end covers, the end covers are provided with glue overflow grooves.

It can also be understood that, as shown in fig. 1, the number of the central pipes is the same as that of the filter elements, and when the number of the filter elements is two, both the filter elements are different, so that different water qualities can be output. When the number of the filter elements is three or more, each filter element may be different, or at least two of the filter elements may be different.

It should be noted that, in the embodiments of the present invention, different filter elements refer to different materials of filter membranes in the filter elements. The filtering membranes are made of different materials, the water quality is different after the filtering by the filtering membranes, and the mineral substances in the water are different. Because the pure water guide cloth in the filtering parts can not change the water quality, the pure water guide cloth in different filtering parts can be the same, and the quantity of the pure water guide cloth can also be the same.

It can also be understood that, as shown in fig. 1, a flow passage is formed inside the central tube, and the outer surface of the central tube includes a fixed side and a water inlet side connected to the fixed side, wherein the water inlet side is provided with a plurality of water inlet holes which are arranged at intervals along the length direction of the central tube, and the water inlet holes are communicated with the flow passage inside the central tube. After the filter element is rolled, the water inlet side of the central tube is covered by the filter membrane part 17 and the corresponding filter part. Before the raw water which is not filtered enters the flow channel of the central pipe, the raw water must be filtered by a filtering membrane and a filtering part on one side of the filtering membrane part 17; the pure water filtered by the filtering membrane part 17 and the filtering part enters the corresponding central pipe flow channel through the water inlet hole and is finally output to the outside of the filter element through the flow channel.

Here, the fixed side means a side for holding the filter membrane unit 17, and the water inlet side means a side where the center pipe is attached to the filter membrane of the filter membrane module or the filter membrane unit 17. The fixed side is a plane, and the water inlet side is an arc surface.

The cross section of the central tube is in a sector shape, the central angles of all the sectors are equal, and the sum of all the central angles is less than or equal to 360 degrees. When the central angles of the sectors are the same, the larger the number of the central pipes is, the smaller the central angle of each sector is. Of course, the central angles of the sectors may be different, at this time, the central angle corresponding to the central tube with a large water yield is large, the central angle corresponding to the central tube with a small water yield is small, and the size of the central angle is specifically determined according to the number of the central tubes and the water yield of the central tubes. Of course, the shape of the cross-section of the center tube is not limited to this, and may be a regular triangle or a trapezoid, in which case the cross-section of the center tube assembly 40 formed by splicing the center tubes is a regular polygon.

It is to be understood that, as shown in fig. 1, the center tube assembly 40 includes a first center tube 41 and a second center tube 42, and the first center tube 41 and the second center tube 42 are each a sector of a semicircle in cross section. The first central tube 41 and the second central tube 42 are spliced together to form a circular tube body, and the circular tube body can facilitate the filter membrane component 17 and the filter component to be wound on the periphery of the central tube component 40.

The fixed sides of the first center tube 41 and the second center tube 42 are flat surfaces, so that the clamping portion of the first pure water guide 21 and the clamping portion 11 of the filter membrane unit 17 can be clamped conveniently. The water inlet sides of the first central tube 41 and the second central tube 42 are arc-shaped surfaces, so that the first central tube 41 and the second central tube 42 can be buckled together to form a circular tube body, and the rolled filter element is ensured to be cylindrical.

Fig. 4 illustrates a schematic diagram of a filter element assembly rolling process provided by an embodiment of the present invention, as shown in fig. 4, the filter element includes a filter membrane component 17, a clamping portion 11 is formed at a middle portion of the filter membrane component 17, a first filtering portion 12 and a second filtering portion 13 connected to the clamping portion 11 are formed at two ends of the filter membrane component 17, and the clamping portion 11 is clamped between a first central tube 41 and a second central tube 42. As shown in fig. 4, the first filter part 12 is a portion of the left side of the center tube assembly 40, and the second filter part 13 is a portion of the right side of the center tube assembly 40, and the length of the first filter part 12 is the same as that of the second filter part 13, but the length of the first filter part 12 may be different from that of the second filter part 13.

Here, the clamping part 11 and the filtering part are both part of the filtering membrane member 17, and the clamping part 11 and the filtering part are only different regions separated by functions. The clamping portion 11 refers to a portion of the filter membrane component 17 clamped between the two central tubes, and the remaining portion is defined as a filter portion. The definition of the clamping portion 11 and the filter portion is only for convenience of describing the structure and the rolling process of the filter cartridge, and is not intended to limit the scope of patent protection. The filter part and the clamping part 11 are distributed along the length direction vertical to the central tube, the width of the clamping part 11 is the same as that of the fixed side of the central tube, when the filter element comprises one filter membrane part 17, the clamping part 11 is positioned in the middle of the filter membrane part 17, and two ends of the filter membrane part 17 are filter parts. When the filter element comprises three or more filter membrane parts 17, one end of each filter membrane part 17 is used as the clamping part 11, and the rest is the filter part.

It can also be understood that the two ends of the first central tube 41 or the second central tube 42 are provided with first positioning mechanisms, the first positioning mechanisms are used for conveniently installing the central tube in the film rolling machine in the filter element rolling process, and the first positioning mechanisms are positioning protrusions or positioning grooves. The two ends of the first central tube 41 and the second central tube 42 are both provided with a second positioning mechanism, the second positioning mechanism is used for conveniently buckling the first central tube 41 and the second central tube 42 together, and the second positioning mechanism is a combination of a positioning protrusion and a positioning groove. When the positioning protrusions are provided at both ends of the first center tube 41, the positioning grooves are provided at both ends of the second center tube 42. When the positioning grooves are provided at both ends of the first center pipe 41, the positioning protrusions are provided at both ends of the second center pipe 42.

It can also be understood that the filter element comprises three filter membrane elements 17 and three filter elements, all of which are made of different materials. The central tube assembly 40 includes three central tubes (not shown) which are all fan-shaped with a central angle of 120 ° in cross section and are spliced together to form a circular tube. The clamping portions 11 of each filtering membrane component 17 are clamped between two adjacent central tubes, and each filtering membrane component is arranged between two adjacent clamping portions 11. Because the material of every filtration membrane part 17 is different, the quality of water that gets into the pure water of center tube after filtration membrane filters is different to realize that a filter core outputs three kinds of quality of water. Of course, the number of the filter membrane unit 17 and the filter unit is not limited thereto, and is determined according to actual needs.

In the related art, the water quality can be adjusted by adding mineral elements, but the concentration of the mineral elements cannot be controlled in the mode, and whether the added substances are effective to a human body cannot be proved. The utility model discloses a but filter core roll membrane method is through the quantity that changes filtration membrane's type and filtration membrane's quantity accurate control mineral substance among the filter unit.

It can also be understood that, as shown in fig. 4, winding the filtering part and the filtering part of the filtering membrane part 17 around the outer circumference of the central tube assembly 40 is accomplished by a membrane winding machine, and by driving the central tube assembly 40 to rotate counterclockwise by means of the membrane winding machine, the filtering part and the filtering part of the filtering membrane part 17 are wound around the outer circumference of the central tube assembly 40. To improve the quality of the filter cartridge, the rotational speed of the central tube assembly 40 during rolling should be kept constant to ensure uniform stress during the filter membrane winding process. The rotation speed of the two ends of the central tube during rotation should be kept synchronous to ensure that the filter part of the filter membrane element 17 and the filter element are not displaced during winding.

It will also be appreciated that the filter membrane unit 17 comprises a fifth filter screen 14 and a fifth filter membrane 15 and a sixth filter membrane 16, which are arranged on either side of the fifth filter screen 14, respectively, as shown in fig. 4. The fifth filter membrane 15 and the first filter element 20 are located on one side of the fifth filter screen 14 and the sixth filter membrane 16 and the second filter element 30 are located on the other side of the fifth filter screen 14.

It can also be understood that a side of the first filter unit 12 facing away from the first center tube 41 is provided with a first pure water guide cloth 21, and one end of the first pure water guide cloth 21 close to the second center tube 42 is clamped between the second center tube 42 and the clamping unit 11.

Here, since the filter membrane unit 17 is in a folded state, that is, the first filter unit 20 is sandwiched between the fifth filter membranes 15, a part of the sixth filter membrane 16 is located on a side of the second filter portion 13 facing away from the first filter portion 12, and another part of the sixth filter membrane 16 is located on a side of the first filter portion 12 facing away from the second filter portion 13. Although each part is in a curled state, when the first part is on one side of the second part, the first part is always on one side of the second part regardless of how many turns are curled, and thus the position between the two parts is the same regardless of before or after curling.

It will also be appreciated that the filter cartridge includes a first filter member 20 and a second filter member 30, the first filter member 20 being located on a side of the first deionized water guide 21 facing away from the first filter portion 12, and the second filter member 30 being located on a side of the second filter portion 13 facing away from the first deionized water guide 21. As shown in fig. 4, the first filter unit 20 is a filter unit on the left side of the filter membrane unit 17, and the second filter unit 30 is a filter unit on the right side of the filter membrane unit 17.

It can also be understood that, as shown in fig. 4, the first filter unit 20 includes a first filter membrane 22, a first filter screen 23, a second pure water guide 24, a second filter membrane 25, a second filter screen 26 and a third pure water guide 27, the first filter membrane 22 folded in half is disposed on a side of the first pure water guide 21 away from the first filter unit 12, the first filter screen 23 is clamped between the first filter membranes 22, the second pure water guide 24 is disposed on a side of the first filter membrane 22 away from the first pure water guide 21, the second filter membrane 25 folded in half is disposed on a side of the second pure water guide 24 away from the first filter membrane 22, the second filter screen 26 is clamped between the second filter membranes 25, and the third pure water guide 27 is disposed on a side of the second filter membrane 25 away from the second pure water guide 24.

In the present embodiment, first filter element 20 includes two filter membranes, i.e., first filter membrane 22 and second filter membrane 25, but other filter membranes and pure water guides may be provided on the side of third pure water guide 27 away from second filter membrane 25. The more the number of the filtering membranes is, the higher the filtering precision of the water is, and the number of the filtering membranes is specifically set according to the water quality requirement output as required.

It should be noted here that each filter membrane is folded in half before the filter element is rolled, and the filter net clamped between the filter membranes is placed between the filter membranes in the folding process. In the process of folding the first filtering membrane 22 in half, the first filtering membrane 22 is firstly folded in half along the center line of the first filtering membrane 22 in the width direction, and the length of the first filtering membrane 22 is halved after the folding in half. The first filter mesh 23 is sandwiched between the folded first filter membranes 22, and the length of the first filter mesh 23 is half of the length of the first filter membrane 22. The second filter membrane 25 is folded in half in the same way as the first filter membrane 22 and will not be described in detail here.

It will be understood that the side edges of the second pure water guide 24 are adhesively connected to the side edges of the first filter membrane 22 and the second filter membrane 25, respectively. In the process of rolling the filter element, glue is applied according to a preset track on one side of the first filtering membrane 22, which is deviated from the first pure water guide cloth 21. Glue can penetrate the second pure water guide 24 and glue the side of the second pure water guide 24 to the side of the first filter membrane 22 and the side of the second filter membrane 25. The predetermined track can be rectangular or U-shaped, and the glue track needs to be ensured to be positioned at the side edges of the filtering membranes in the gluing process so as to ensure that the side edges of the second pure water guide cloth 24 are not adhered to the side edges of the first filtering membrane 22 and the second filtering membrane 25 respectively, and the rest parts are not adhered.

Similarly, the side edges of the third pure water guide 27 are bonded to the side edges of the second filter membrane 25 and the second filter unit 13 by adhesive. The side of the third pure water guide 27 is connected to the side of the second filter membrane 25 and the side of the second filter part 13, and is also glued on the side of the second filter membrane 25 facing away from the second pure water guide 24 according to a predetermined track, in the same way as the glue.

Similarly, the side of the first pure water guide cloth 21 is connected to the side of the first filter membrane 22 and the side of the fifth filter membrane 15 by gluing on the side of the first filter part 12 away from the first central tube 41, and the gluing mode is the same as the gluing mode described above.

It can be understood that the second filter unit 30 includes a fourth pure water guide cloth 31, a third filter membrane 32, a third filter screen 33, a fifth pure water guide cloth 34, a fourth filter membrane 35 and a fourth filter screen 36, the fourth pure water guide cloth 31 is disposed on one side of the second filter portion 13 departing from the third pure water guide cloth 27, the folded third filter membrane 32 is disposed on one side of the fourth pure water guide cloth 31 departing from the second filter portion 13, the third filter screen 33 is clamped between the third filter membrane 32, the fifth pure water guide cloth 34 is disposed on one side of the third filter membrane 32 departing from the fourth pure water guide cloth 31, the folded fourth filter membrane 35 is disposed on one side of the fifth pure water guide cloth 34 departing from the third filter membrane 32, and the fourth filter screen 36 is clamped between the fourth filter membrane 35. The manner of folding the third filter membrane 32 in half and the fourth filter membrane 35 in half is the same as described above and will not be described in detail here.

It should be noted that, during the process of rolling the filter element, each filter membrane is placed in such a way that the end of the filter membrane having the fold is placed close to the side of the central tube. The second filter unit 30 in this embodiment includes two filter membranes, i.e., a third filter membrane 32 and a fourth filter membrane 35, but other filter membranes and pure water guides may be disposed on the side of the fourth filter membrane 35 away from the fifth pure water guide 34. The greater the number of filtration membranes, the greater the filtration accuracy of the water, and the more the number of filtration membranes of the second filtration part 30 is set according to the water quality requirement to be output.

It is understood that a sixth pure water guide 37 is disposed between the fourth filtering membrane 35 and the first filtering part 12, a first end of the sixth pure water guide 37 is connected to the first central tube 41, and a second end of the sixth pure water guide 37 is wound around the outer circumferential surface of the filter element assembly 10. The sixth pure water guide 37 is provided to separate the fourth filtration membrane 35 from the sixth filtration membrane 16, and a water flow path is formed between the fourth filtration membrane 35 and the sixth filtration membrane 16. The length of the sixth pure water guide cloth 37 is greater than that of the filtering membrane part 17, so that after the sixth pure water guide cloth 37 is wound around the outer circumference of the central tube assembly 40 along with the filtering part and the filtering part of the filtering membrane part 17, the remaining part of the sixth pure water guide cloth 37 can be continuously wound around the outer circumference of the filter element assembly 10 for several turns, so as to wrap the filtering membrane part 17 and the filtering part inside, and the adjacent two filters are tightly attached.

It is understood that the first filtration membrane 22, the second filtration membrane 25 and the fifth filtration membrane 15 are made of the same material and are NF membranes. The third filtration membrane 32, the fourth filtration membrane 35 and the sixth filtration membrane 16 are made of the same material, and are RO membranes. Of course, the specific type of the filtering membrane is not limited to this, and is set according to actual needs.

It can be understood that the filtering accuracy of water is different because the filtering membranes of the first filtering part 20 and the second filtering part 30 are different in material. The filtering parts arranged between the two adjacent filtering parts of the filtering membrane part 17 are different, so that the water quality output to the central pipe after filtering is different, and the purpose that one core outputs multiple water qualities is realized; because the filter element structure is improved to output different water qualities, the water quality adjustment is not required to be realized through a plurality of filter elements, the number of the filter elements is reduced, the volume of the water purifier is effectively reduced, and the structure of the water purifier is simplified.

Through adopting the utility model discloses the filter core only needs a filter core just can export different quality of water, uses the utility model discloses the filter core that membrane method was rolled up to the filter core of membrane is used with the outside adjusting device cooperation of filter core, can realize the flow control of multiple quality of water, can realize the stepless adjustable of desalination and ion again.

In order to facilitate understanding of the structure of the filter element, the present invention further provides a filter element rolling membrane method, as shown in fig. 4, the filter element rolling membrane method includes the following steps:

one end of the sixth pure water guide cloth 37 is connected to the first center pipe 41;

the clamping part 11 of the filter membrane component 17 is placed on the side of the sixth pure water guide cloth 37, which is far away from the first central tube 41, along the length direction of the first central tube 41;

gluing according to a preset track on one side of the first filter part 12, which is far away from the first central tube 41;

a first pure water guide cloth 21 is arranged on one side of the first filter part 12, which is far away from the first central pipe 41;

placing the second center tube 42 on the side of the first pure water guide 21 away from the first filter part 12, and engaging with the first center tube 41, so that the clamping part 11 of the first pure water guide 21 and the clamping part 11 of the filter membrane component 17 are clamped between the first center tube 41 and the second center tube 42;

the first filtering membrane 22 is arranged at one side of the first pure water guide cloth 21, which is far away from the first filtering part 12;

gluing according to a preset track on one side of the first filtering membrane 22, which is far away from the first pure water guide cloth 21;

the second pure water guide 24 is placed on the side of the first filter membrane 22 facing away from the first pure water guide 21;

a second filter membrane 25 is arranged on the side of the second pure water guide 24 facing away from the first filter membrane 22;

gluing according to a preset track on one side of the second filtering membrane 25, which is far away from the second pure water guide cloth 24;

a third pure water guide 27 is placed on the side of the second filter membrane 25 facing away from the second pure water guide 24;

the second filtering part 13 is turned around the second central tube 42 to the side of the third pure water guide cloth 27 away from the second filtering membrane 25;

and gluing according to a preset track on the side of the second filter part 13, which is far away from the third pure water guide cloth 27.

A fourth pure water guide cloth 31 is arranged at one side of the second filter part 13, which is far away from the third pure water guide cloth 27;

the third filter membrane 32 is arranged on the side of the fourth pure water guide cloth 31 away from the second filter part 13;

gluing the side of the third filtering membrane 32, which is far away from the fourth pure water guide cloth 31, according to a preset track;

a fifth pure water guide 34 is placed on the side of the third filter membrane 32 facing away from the fourth pure water guide 31;

the fourth filter membrane 35 is placed on the side of the fifth pure water guide 34 facing away from the third filter membrane 32.

It will be appreciated that as shown in fig. 1 and 2, the filter cartridge further includes a waterway conversion assembly 70, a mounting cavity 71 is formed on a side of the first end cap 62 facing away from the filter cartridge assembly 10, and an end of the mounting cavity 71 facing away from the first end cap 62 is open. The cover 52 is formed with a fixing ring on a side facing the first end cap 62, the fixing ring is sleeved on the edge of the opening and is in sealing fit with the opening of the mounting cavity 71 through the sealing ring. Waterway conversion assembly 70 is disposed in installation cavity 71, waterway conversion assembly 70 and installation cavity 71 are coaxially disposed, a wastewater channel 72 is formed between waterway conversion assembly 70 and the inner wall of installation cavity 71, wastewater channel 72 is an annular channel, housing 50 is formed with a wastewater port 54, and wastewater channel 72 is respectively communicated with wastewater port 54 and the first water outlet. A water inlet passage 73 is formed in the housing 50, and the water inlet passage 73 is communicated with the first water inlet 64 and the water inlet port 53, respectively. Two water outlet channels 74 are formed inside the water path switching assembly 70, the number of the water outlet channels 74 is the same as that of the central pipes, and the first ends of the central pipes are in one-to-one correspondence communication with the water outlet ports 55 through the water outlet channels 74. Of course, the number of the outlet flow passages 74 is not limited to two, and is determined according to the number of the central pipes.

It will be appreciated that the first end cap 62 is formed with a mounting hole that is centrally located in the first end cap 62. The mounting hole is worn to locate by the one end that water route conversion component 70 is close to the center tube, and water route conversion component 70 and the sealed cooperation in border of mounting hole, the one end that water route conversion component 70 is close to the center tube is formed with two grafting portions, the inside cavity of grafting portion and the play water flow channel 74 intercommunication that corresponds, grafting portion insert in the first end of corresponding center tube to through sealing washer and center tube seal fit. Of course, the detachable connection method of the water path switching unit 70 and the first end of the center pipe is not limited to the above-mentioned insertion method, and the inner diameter of the insertion part may be set larger than the outer diameter of the center pipe, and the first end of the center pipe may be inserted into the insertion part.

It can be understood that two positioning members are formed on one side of the second end cover 63 facing the filter element assembly 10, the positioning members and the second end cover 63 are integrally formed, but the connection mode of the positioning members and the second end cover 63 is not limited thereto, and the inner wall of the water through hole may be provided with threads, and the positioning members are installed in the water through hole through the threads. One of the positioning members is hollow, and the two positioning members are inserted into the second end of the corresponding center tube, and the hollow positioning member connects the second end of the center tube with the water storage chamber 56. In order to conveniently install the second end cover 63 at the second end of the filter element assembly 10, the edge of the positioning element far away from one end of the second end cover 63 is provided with a guide inclined plane, the guide inclined plane is arranged to reduce the outer diameter of the positioning element far away from one end of the second end cover 63, the positioning element is conveniently inserted into the corresponding central tube, and the guide inclined plane plays a role in guiding during the insertion process, so that the positioning element can be rapidly inserted in place.

In order to facilitate understanding of the working principle of the filter cartridge, the working principle of the filter cartridge is explained below with reference to fig. 1 and 2.

Raw water (single-line solid arrow) enters the water inlet channel 73 through the water inlet port 53, and then enters the first end of the filter element assembly 10 through the first water inlet 64, and because the filter element assembly 10 is in sealing fit with the inner wall of the fresh-keeping bin assembly, the raw water can only flow to the second end of the filter element assembly 10 along the length direction of the filter element assembly 10. Meanwhile, part of water flows into the central tube along the radial direction of the filter element assembly 10, and in the process of flowing to the central tube, two kinds of pure water with different water qualities can be formed due to different materials of the filter elements, namely first pure water (wide-line solid arrow) and second pure water (wide-line hollow arrow), after the first pure water enters the corresponding central tube, one part of the first pure water in the central tube enters the water storage cavity 56 for storage, and the other part of the first pure water enters the corresponding water outlet flow channel 74 through the first end of the central tube and is finally output through the water outlet port 55. After the second pure water enters the corresponding central tube, all the second pure water in the central tube enters the corresponding water outlet flow channel 74 through the first end of the central tube, and is finally output through the corresponding water outlet port 55. The waste water produced during the filtration process (single line hollow arrows) enters the waste water channel 72 through the first water outlet and is finally output through the waste water port 54.

The utility model also provides a water purifier, including casing and the arbitrary one of above-mentioned embodiment the water purifier filter core, the filter core set up in the casing. According to the water purifier provided by the embodiment of the utility model, a core can output a plurality of water qualities; the quantity of the filter elements is reduced, the volume of the water purifier is effectively reduced, the structure of the water purifier is simplified, and the competitiveness of the product is enhanced.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (14)

1. A water purifier filter element, comprising:

the fresh-keeping bin assembly is internally provided with a cavity, and the fresh-keeping bin assembly is provided with a first water inlet;

the central pipe assembly is arranged in the cavity and comprises at least two central pipes, and water inlet holes are formed in the pipe walls of the central pipes;

a filter element assembly disposed within the cavity, the filter element assembly including a filter membrane component and at least two different filter components; the clamping parts of the filtering membrane components are clamped between two adjacent central tubes along the length direction of the central tubes, the filtering components are arranged between two adjacent filtering parts of the filtering membrane components, and the filtering parts and the filtering components of the filtering membrane components are wound on the periphery of the central tube assembly.

2. The water purifier cartridge according to claim 1, wherein the center tube assembly comprises a first center tube and a second center tube, the middle of the filter membrane member forms the clamping portion, and both ends of the filter membrane member form a first filter portion and a second filter portion connected to the clamping portion; the clamping portion is clamped between the first center pipe and the second center pipe.

3. The water purifier filter element according to claim 2, wherein a first pure water guide cloth is provided on a side of the first filter unit facing away from the first center tube, and one end of the first pure water guide cloth close to the second center tube is clamped between the second center tube and the clamping unit.

4. The water purifier filter element according to claim 3, wherein said filter element comprises a first filter member and a second filter member, said first filter member being located on a side of said first pure water guide facing away from said first filter portion, said second filter member being located on a side of said second filter portion facing away from said first pure water guide.

5. The water purifier filter element of claim 4, wherein the first filter element comprises a first filter membrane, a first filter screen, a second pure water guide, a second filter membrane, a second filter screen, and a third pure water guide, the first filter membrane folded in half is disposed on a side of the first pure water guide facing away from the first filter portion, the first filter screen is clamped between the first filter membrane, the second pure water guide is disposed on a side of the first filter membrane facing away from the first pure water guide, the second filter membrane folded in half is disposed on a side of the second pure water guide facing away from the first filter membrane, the second filter screen is clamped between the second filter membrane, and the third pure water guide is disposed on a side of the second filter membrane facing away from the second pure water guide.

6. The water purifier filter element according to claim 5, wherein sides of the second pure water guide are connected to sides of the first filter membrane and sides of the second filter membrane, respectively, and sides of the third pure water guide are connected to sides of the second filter membrane and sides of the second filter unit, respectively.

7. The water purifier filter element of claim 5 or 6, wherein the second filter element comprises a fourth pure water guide, a third filter membrane, a third filter screen, a fifth pure water guide, a fourth filter membrane, and a fourth filter screen, the fourth pure water guide is disposed on a side of the second filter portion facing away from the third pure water guide, the folded third filter membrane is disposed on a side of the fourth pure water guide facing away from the second filter portion, the third filter screen is clamped between the third filter membranes, the fifth pure water guide is disposed on a side of the third filter membrane facing away from the fourth pure water guide, the folded fourth filter membrane is disposed on a side of the fifth pure water guide facing away from the third filter membrane, and the fourth filter screen is clamped between the fourth filter membranes.

8. The water purifier cartridge as recited in claim 7, wherein the fourth pure water guide has a side connected to a side of said third filtration membrane and a side of said second filtration unit, respectively, and the fifth pure water guide has a side connected to a side of said third filtration membrane and a side of said fourth filtration membrane, respectively.

9. The water purifier filter element according to claim 7, wherein a sixth pure water guide cloth is provided between the fourth filter membrane and the first filter unit, a first end of the sixth pure water guide cloth is connected to the first center tube, and a second end of the sixth pure water guide cloth is wound around an outer circumferential surface of the filter element assembly.

10. The water purifier filter element according to claim 7, wherein said filter membrane member comprises a fifth filter screen and a fifth filter membrane and a sixth filter membrane disposed on either side of said fifth filter screen, respectively, said first filter member and said fifth filter membrane being disposed on one side of said fifth filter screen, said sixth filter membrane and said second filter member being disposed on the other side of said fifth filter screen.

11. The water purifier filter element according to claim 10, wherein the first filter membrane, the second filter membrane and the fifth filter membrane are made of the same material, and the third filter membrane, the fourth filter membrane and the sixth filter membrane are made of the same material.

12. The water purifier filter element according to any one of claims 1 to 6, wherein both ends of the filter element assembly and the outer peripheral surface of the filter element assembly are in sealing engagement with the inner wall of the fresh food compartment assembly.

13. The water purifier cartridge according to any one of claims 1 to 6, further comprising:

the fresh-keeping bin assembly is arranged in the shell, the first water inlet is communicated with the water inlet port, and the water outlet ports are communicated with the first ends of the central pipes in a one-to-one correspondence manner; the fresh-keeping bin assembly is provided with a first water outlet which is communicated with the waste water port.

14. A water purifier comprising a housing and the water purifier filter element according to any one of claims 1 to 13, the filter element being disposed in the housing.

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