CN115159707B

CN115159707B - Filter element and water purifying equipment

Info

Publication number: CN115159707B
Application number: CN202210908322.0A
Authority: CN
Inventors: 桂鹏; 郑跃东
Original assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Current assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2023-09-22
Anticipated expiration: 2042-07-29
Also published as: CN115159707A

Abstract

The invention relates to the technical field of water purification, and provides a filter element and water purification equipment. The filter element comprises a shell, a fresh-keeping bin assembly, a central tube assembly and a filter element assembly, wherein the filter element assembly comprises a filter membrane component and at least two different filter components; the clamping part of the filtering membrane component is clamped between two adjacent central pipes along the length direction of the central pipes, the filtering component is arranged between two adjacent filtering parts of the filtering membrane component, and the filtering parts of the filtering membrane component and the filtering component are wound on the periphery of the central pipe component. Because form the water storage chamber between fresh-keeping storehouse subassembly and the casing, the water storage chamber is stored in the part pure water that water purification unit in-process after filter core subassembly filters can be entered into, after the start-up next time, and the pure water in the water storage chamber loops through the first end of center tube, the output of apopore under the pressure effect, effectively solves the problem of first cup water. Because the water storage cavity and the fresh-keeping bin component are integrated in the filter element, the volume of the water purifier is effectively reduced.

Description

Filter element and water purifying equipment

Technical Field

The invention relates to the technical field of water purification, in particular to a filter element and water purification equipment.

Background

The main stream of the household water purification market is a reverse osmosis water purifier at present, and the household water purification market is deeply favored by users due to extremely high filtering precision and service cycle, and the market proportion reaches more than 90 percent. As is known, the reverse osmosis filter element has the first cup water phenomenon (the desalination rate is rapidly reduced due to ion permeation after a period of shutdown), and the problems of large volume and complex structure of the whole machine are solved by adopting pure water reflux, double-membrane mutual flushing and water-driven tank flushing in the industry.

Disclosure of Invention

The present invention is directed to solving at least one of the technical problems existing in the related art. Therefore, the invention provides the filter element, which effectively reduces the volume of the filter element, simplifies the structure of the filter element and avoids the problem of first cup water.

The invention also provides water purifying equipment.

An embodiment of a filter cartridge according to the first aspect of the invention comprises:

a housing formed with a water inlet port and at least two water outlet ports;

the fresh-keeping bin assembly is arranged in the shell, and a water storage cavity suitable for storing water is formed between the fresh-keeping bin assembly and the shell; the fresh-keeping bin assembly is internally provided with a cavity, a first water inlet is formed in the fresh-keeping bin assembly, and the first water inlet is communicated with the water inlet port;

the central pipe assembly is arranged in the cavity and comprises at least two central pipes, water inlet holes are formed in the pipe walls of the central pipes, the first ends of the central pipes are communicated with the water outlet ports in a one-to-one correspondence mode, and the second ends of one central pipe are communicated with the water storage cavity;

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

According to the filter element provided by the embodiment of the invention, the fresh-keeping bin assembly is arranged outside the filter element assembly, the water storage cavity is formed between the fresh-keeping bin assembly and the shell, the second end of one of the central pipes is communicated with the water storage cavity, part of pure water filtered by the filter element assembly in the use process of the water purifying equipment can enter the water storage cavity for storage, and after the next starting-up, the pure water in the water storage cavity sequentially passes through the first end of the central pipe and the water outlet port under the action of pressure and is output, so that the problem of first cup of water is effectively solved. The fresh-keeping bin assembly has a simple structure, so that the fresh-keeping bin assembly has extremely high stability; because the water storage cavity and the fresh-keeping bin component are integrated in the filter element, the volume of the water purifier is effectively reduced.

According to one embodiment of the invention, the fresh food compartment assembly comprises:

the fresh-keeping bin body is sleeved on the periphery of the filter element assembly and is in sealing fit with the periphery of the filter element assembly;

the first end cover is arranged at the first end of the fresh-keeping bin body and is respectively in sealing fit with the first end of the filter element assembly and the fresh-keeping bin body; the first water inlet is positioned on the first end cover, and a first water outlet is formed on the first end cover;

The second end cover is arranged at the second end of the fresh-keeping bin body and is respectively in sealing fit with the second end of the filter element assembly and the fresh-keeping bin body; the second end cover is provided with a water passing hole, and the water storage cavity is communicated with the second end of the corresponding central pipe through the water passing hole.

According to one embodiment of the invention, the fresh-keeping bin body comprises a colloid and a flexible connecting piece wound on the outer peripheral surface of the filter element assembly, the colloid is coated on the outer peripheral surface of the filter element assembly, and the flexible connecting piece is embedded in the colloid.

According to one embodiment of the invention, the thickness of the fresh-keeping bin body is 1-3mm.

According to one embodiment of the 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 part, and the two ends of the filtering membrane component form a first filtering part and a second filtering part which are connected with the clamping part; the clamping part is clamped between the first central tube and the second central tube.

According to one embodiment of the invention, a first pure water guide cloth is arranged on one side, away from the first central tube, of the first filtering part, and one end, close to the second central tube, of the first pure water guide cloth is clamped between the second central tube and the clamping part.

According to one embodiment of the invention, the filter cartridge comprises a first filter element and a second filter element, the first filter element being located on a side of the first pure water guide facing away from the first filter portion, the second filter element being located on a side of the second filter portion facing away from the first pure water guide.

According to one embodiment of the present invention, the first filtering component includes a first filtering membrane, a first filtering screen, a second pure water guiding cloth, a second filtering membrane, a second filtering screen and a third pure water guiding cloth, the folded first filtering membrane is disposed on one side of the first pure water guiding cloth, which is away from the first filtering portion, the first filtering screen is clamped between the first filtering membranes, the second pure water guiding cloth is disposed on one side of the first filtering membrane, which is away from the first pure water guiding cloth, the folded second filtering membrane is disposed on one side of the second pure water guiding cloth, which is away from the first filtering membrane, the second filtering screen is clamped between the second filtering membranes, and the third pure water guiding cloth is disposed on one side of the second filtering membrane, which is away from the second pure water guiding cloth.

According to one embodiment of the present invention, the second filtering component includes a fourth pure water guiding cloth, a third filtering membrane, a third filtering screen, a fifth pure water guiding cloth, a fourth filtering membrane and a fourth filtering screen, wherein the fourth pure water guiding cloth is arranged at one side of the second filtering portion, which is away from the third pure water guiding cloth, the third filtering membrane folded in half is arranged at one side of the fourth pure water guiding cloth, which is away from the second filtering portion, the third filtering screen is clamped between the third filtering membranes, the fifth pure water guiding cloth is arranged at one side of the third filtering membrane, which is away from the fourth pure water guiding cloth, the fourth filtering membrane folded in half is arranged at one side of the fifth pure water guiding cloth, which is away from the third filtering membrane, and the fourth filtering screen is clamped between the fourth filtering membranes.

According to one embodiment of the present invention, a sixth pure water guide cloth is disposed between the fourth filtering membrane and the first filtering part, a first end of the sixth pure water guide cloth is connected to the first central tube, and a second end of the sixth pure water guide cloth is wound around the outer circumferential surface of the filter element assembly.

According to one embodiment of the present invention, further comprising:

the water channel conversion assembly is arranged in the installation cavity, a waste water flow channel is formed between the water channel conversion assembly and the inner wall of the installation cavity, a waste water port is formed in the shell, and the waste water flow channel is respectively communicated with the waste water port and the first water outlet; a water inlet flow channel is formed in the shell and is respectively communicated with the first water inlet and the water inlet port; the inside of waterway conversion subassembly is formed with two at least water outlet flow channels, the first end of center tube passes through water outlet flow channel with the outlet port one-to-one intercommunication.

According to one embodiment of the invention, the first end cover is provided with a mounting hole, and one end of the waterway conversion assembly, which is close to the central tube, is penetrated through the mounting hole and is detachably connected with the first end of the central tube.

According to a second aspect of the present invention, a water purifying apparatus includes a housing and a filter element according to any one of the above, where the filter element is disposed in the housing.

The above technical solutions in the embodiments of the present invention have at least one of the following technical effects:

Further, by using the filter element, the stability of the water purifying equipment is effectively improved, the volume of the water purifying equipment is reduced, and the product competitiveness 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 embodiments of the present invention or the technical solutions in the related art, the drawings that are required to be used in the embodiments or the related technical descriptions will be briefly described, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.

FIG. 1 is a schematic side sectional view of a filter element according to an embodiment of the present invention;

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

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

FIG. 4 is a schematic illustration of a filter element assembly rolling process provided by an embodiment of the present invention;

fig. 5 is a schematic structural view of a fresh keeping bin assembly according to an embodiment of the invention.

Reference numerals:

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

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of 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", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus 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 describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.

In embodiments of the invention, unless expressly specified and limited otherwise, a first feature "up" or "down" on a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 the embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed 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. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Fig. 1 illustrates a schematic side sectional structure of a filter cartridge according to an embodiment of the present invention, and fig. 2 illustrates a schematic enlarged partial structure at a in fig. 1, as shown in fig. 1 and 2, the filter cartridge includes a housing 50, a fresh-keeping bin assembly, a center tube assembly 40, and a filter cartridge assembly 10, and the housing 50 is formed with an inlet port 53 and at least two outlet ports 55. The fresh-keeping bin assembly is arranged in the shell 50, and a water storage cavity 56 suitable for storing water is formed between the fresh-keeping bin assembly and the shell 50; the interior of the fresh keeping bin assembly is formed with a cavity, the fresh keeping bin assembly is formed with a first water inlet 64, and the first water inlet 64 is communicated with the water inlet port 53. The central tube assembly 40 is disposed in the cavity, the central tube assembly 40 includes at least two central tubes, the walls of the central tubes are formed with water inlet holes, the first ends of the central tubes are communicated with the water outlet ports 55 in one-to-one correspondence, and the second end of one of the central tubes is communicated with the water storage cavity 56. The filter element assembly 10 is disposed within the cavity, the filter element assembly 10 comprising a filter membrane member 17 and at least two different filter members; the clamping portion 11 of the filtering membrane member 17 is clamped between two adjacent center tubes along the length direction of the center tubes, the filtering member is disposed between two adjacent filtering portions of the filtering membrane member 17, and the filtering portion and the filtering member of the filtering membrane member 17 are wound around the outer periphery of the center tube assembly 40.

According to the filter element provided by the embodiment of the invention, as shown in fig. 1, by arranging the fresh-keeping bin assembly outside the filter element assembly 10, a water storage cavity 56 is formed between the fresh-keeping bin assembly and the shell 50, and the second end of one of the central pipes is communicated with the water storage cavity 56, and part of pure water filtered by the filter element assembly 10 in the use process of the water purifying equipment can enter the water storage cavity 56 for storage, so that the air in the water storage cavity 56 is compressed; when the machine is stopped, the pure water is closed, the pressure of the raw water end is disconnected, the pure water slowly descends under the action of air pressure, part of wastewater is discharged through the first water outlet, the amount of wastewater exchange is reduced, and the concentration balance is achieved as soon as possible. After the next start-up, pure water in the water storage cavity 56 sequentially passes through the first end of the central tube and the water outlet port 55 under the pressure effect, so that the problem of first cup of water is effectively solved. The fresh-keeping bin assembly has a simple structure, so that the fresh-keeping bin assembly has extremely high stability; because the water storage cavity 56 and the fresh-keeping bin assembly are integrated in the filter element, the volume of the water purifier is effectively reduced.

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

It should be noted that, the filter element assembly 10 is in sealing fit with the inner wall of the fresh-keeping bin assembly mainly through an adhesive connection mode, and other connection modes can be adopted.

It will be appreciated that the housing 50 is also formed with a waste water port 54, and the fresh food compartment assembly is disposed within the housing 50, and the fresh food compartment assembly is formed with a first water outlet which communicates with the waste water port 54.

It will be appreciated that as shown in fig. 1, the housing 50 includes a housing body 51 and a cover 52, the housing body 51 being a cylindrical barrel, the housing 50 being hollow internally, the housing 50 being adapted to receive the cartridge assembly 10. Of course, the shape of the housing 50 is not limited to this, and may be a cylindrical body having a regular polygon in cross section, and is specifically determined according to the shape of the cartridge assembly 10. The first end of the housing main body 51 is formed with an opening, the cover 52 is covered on the opening, and the cover 52 and the housing main body 51 constitute a closed space. A water inlet port 53, a wastewater port 54, and a water outlet port 55 are formed in the cover 52.

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

It can be understood that, because the problems of the first cup of water are usually solved by pure water backflow, double-membrane mutual flushing and water-driven tank flushing in the related technology, the problems of more waste water, large noise, large whole machine volume and complex and unreliable system exist although a certain effect is achieved. While the above problems are theoretically solved by modifying the RO 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 carry out; secondly, in the reverse osmosis operation process, a higher pressure fluctuation exists, and the general materials cannot bear higher pressure; thirdly, the colloid requirement on the sealed fresh-keeping bin is higher, and food-grade environment-friendly colloid is needed. Fourth, higher reliability is necessary. Therefore, the filter element of the present invention is provided with the fresh-keeping bin assembly outside the filter element assembly 10, which can effectively solve the above-mentioned problems.

Fig. 5 illustrates a schematic structural diagram of a fresh-keeping bin assembly according to an embodiment of the present invention, as shown in fig. 1 and 5, the fresh-keeping bin assembly includes a fresh-keeping bin body 61, a first end cover 62 and a second end cover 63, the fresh-keeping bin body 61 is sleeved on the periphery of the filter element assembly 10, and an inner wall of the fresh-keeping bin body 61 is in sealing fit with the peripheral surface of the filter element assembly 10, so as to prevent streaming between the fresh-keeping bin body 61 and the 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 adhesive, and can be in sealing fit in other manners.

The first end cover 62 is disposed at a first end of the fresh-keeping bin body 61, and the first end cover 62 is respectively in sealing fit with the first end of the filter element assembly 10 and the fresh-keeping bin body 61. The first end cap 62 may be in sealing engagement with the first end of the filter element assembly 10 in a variety of manners, such as by adhesive sealing, or by providing an annular ridge on the side of the first end cap 62 facing the filter element assembly 10, and by inserting the annular ridge into the first end of the filter element assembly 10.

The first end cover 62 is also in sealing fit with the first end of the fresh-keeping bin body 61, the first end cover 62 and the fresh-keeping bin body 61 are sealed by adopting gluing, in the process of manufacturing the fresh-keeping bin body 61 by using glass fibers, part of the glass fibers immersed in glue are wound on the first end cover 62, and after the glue is solidified, the glass fibers are connected with the first end cover 62 by gluing, so that the sealing between the first end cover 62 and the fresh-keeping bin body 61 is realized.

The center of the first end cover 62 is provided with a mounting hole, the first water inlet 64 is positioned at the outer edge of the first end cover 62, raw water enters the filter element assembly 10 through the first water inlet 64 arranged at the outer edge, the flowing distance of the raw water in the radial direction of the filter element assembly 10 can be increased, and the purifying effect of the filter element is enhanced. To increase the inflow amount of the first water inlet 64, the first water inlet 64 is provided as an annular water inlet. The first end cover 62 is formed with a first water outlet, the first water outlet is located at a position where the first end cover 62 is opened into the mounting hole, the first water outlet is arranged around the mounting hole, and the first water outlet is an annular water outlet. Of course, the first water outlets can also be a plurality of independent strip-shaped or round water outlets, and the first water outlets are arranged at the periphery of the mounting hole at equal intervals.

The second end cover 63 is disposed at the second end of the fresh-keeping bin body 61, the second end cover 63 is respectively in sealing fit with the second end of the filter element assembly 10, the sealing fit modes of the second end cover 63 and the second end of the filter element assembly 10 can be multiple, and the sealing fit can be realized by gluing, or by disposing an annular protruding edge on one side of the second end cover 63, facing the filter element assembly 10, and embedding the annular protruding edge into the second end of the filter element assembly 10. The second end cap 63 is also in sealing engagement with the fresh food compartment body 61, and the sealing engagement of the second end cap 63 with the fresh food compartment body 61 is the same as the sealing engagement of the first end cap 62 with the fresh food compartment body 61 and will not be described in detail herein. The second end cap 63 is formed with a water passing hole through which the water storage chamber 56 communicates with the second end of the corresponding center tube.

It will be appreciated 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 small, the thickness of the fresh-keeping bin body 61 is required to be very thin, the thinner the fresh-keeping bin body 61 is, the larger the water storage capacity of the water storage cavity 56 is, and in this embodiment, the thickness of the fresh-keeping bin body 61 is 1-3mm. The fresh-keeping bin body 61 needs to have high strength because the fresh-keeping bin body 61 needs to bear large pressure fluctuation in the use process. The filter element of the embodiment of the invention is formed by the flexible piece and the colloid, so that the fresh-keeping bin still has high strength by using the flexible connecting piece 65 with high strength under the condition of reducing the thickness of the fresh-keeping bin body 61, so as to meet the compression-resistant requirement of the fresh-keeping bin body 61.

It can be appreciated that the colloid is food-grade glue, and the food-grade glue is adopted to manufacture the fresh-keeping bin body 61, so that the problem that the pure water in the filter element has peculiar smell can be avoided, the quality of the drinking water is improved, the user experience is enhanced, and the product competitiveness is improved.

In order to facilitate understanding of the advantages of the fresh-keeping bin body 61, the invention also provides a manufacturing process of the fresh-keeping bin assembly, wherein the fresh-keeping bin body 61 is composed of glue and a flexible piece, the main component of the glue is AB glue, and the glue is preferably food-grade polyurethane glue. The density of the adhesive A is 0.95-1.05g/cm ³ The density of the adhesive B is 1.18-1.28g/cm ³ The method comprises the steps of carrying out a first treatment on the surface of the The viscosity of the A glue is 1600-2400mPa.s at 20 ℃, the viscosity of the B glue is 30-70mPa.s at 20 ℃, and the viscosity of the AB glue is 200-600mPa.s at 20 ℃. The surface drying time of the glue is 30min-1h, and the surface drying time of the glue is the time from the beginning of the curing to the curing of the surface of the glue. Since the bearing strength of the fresh food compartment body 61 is related to the strength of the flexible connector 65 and also to the gluePerformance is relevant. In this embodiment, the curing strength of the glue is 5Mpa, however, the curing strength of the glue is not limited thereto, and is specifically selected according to actual needs.

The flexible piece is 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:

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

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

the AB glue impregnated fiberglass was wound onto the outer peripheral surface of the cartridge assembly 10 by automated means starting from the beginning of the first end cap 62 and feeding the glue impregnated fiberglass while rotating, reciprocally winding 2-3 turns.

After the glue is solidified, the fresh-keeping bin body 61 is adhered to the first end cover 62, the second end cover 63 and the outer peripheral surface of the filter element assembly 10 respectively, so that the filter element assembly 10 is sealed in the fresh-keeping bin assembly, and the pressure bearing of the solidified fresh-keeping bin assembly 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 will also be appreciated that as shown in fig. 1, the number of central tubes is the same as the number of filter elements, and when the number of filter elements is two, both filter elements are different, so that different water qualities can be output. When the number of filter elements is three or more, each filter element may be different, or at least two filter elements may be different.

Here, the different filtering components in the embodiments of the present invention refer to different materials of the filtering membrane in the filtering components. The materials of the filtering membranes are different, the water quality is different after the filtering membranes are used for filtering, and the mineral substances in the water are different. Since the pure water guiding cloth in the filter member does not change the water quality, the pure water guiding cloth in different filter members may be the same, and the number of pure water guiding cloths may be the same.

It will also be appreciated that, as shown in fig. 1, the inside of the central tube is formed with a flow passage, and the outer surface of the central tube includes a fixed side and a water inlet side connected with the fixed side, wherein the water inlet side is provided with a plurality of water inlet holes, the water inlet holes 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 cartridge has been rolled up, the water inlet side of the central tube is covered by the filter membrane member 17 and the corresponding filter member. Before the unfiltered raw water enters the flow passage of the central tube, the unfiltered raw water must be filtered by the filtering membrane on one side of the filtering membrane component 17 and the filtering component; pure water filtered by the filtering membrane component 17 and the filtering component enters the corresponding central pipe flow channel through the water inlet hole and finally is output to the outside of the filter element through the flow channel.

Here, the fixed side refers to a side for sandwiching the filter membrane member 17, and the water inlet side refers to a side where the center tube is attached to the filter membrane of the filter membrane module or the filter membrane member 17. The fixed side is a plane, and the water inlet side is a cambered surface.

The cross section of the central tube is in a sector shape, the central angles of all sectors are equal, and the sum of all the central angles is less than or equal to 360 degrees. When the central angles of each sector are the same, the more the number of central tubes, the smaller the central angle of each sector. Of course, the central angles of the sectors may be different, and at this time, the central angle corresponding to the central tube with large water yield is large, the central angle corresponding to the central tube with small water yield is small, and the size of the central angle is 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 trapezoid, and the cross section of the center tube assembly 40 formed by splicing the center tubes may be a regular polygon.

It will be appreciated that the center tube assembly 40 includes a first center tube 41 and a second center tube 42, as shown in FIG. 1, the first center tube 41 and the second center tube 42 each having a semicircular sector 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 filtering membrane component 17 and the filtering component to be wound on the periphery of the central tube component 40.

The fixing sides of the first and second center tubes 41 and 42 are flat surfaces to facilitate clamping of the clamping portion of the first pure water guide 21 and the clamping portion 11 of the filtering membrane member 17. 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 are buckled together to form a circular tube body, and the rolled filter element is ensured to be a cylinder.

Fig. 4 illustrates a schematic diagram of a rolling process of a filter element assembly according to an embodiment of the present invention, as shown in fig. 4, the filter element includes a filter membrane member 17, a clamping portion 11 is formed in the middle of the filter membrane member 17, a first filter portion 12 and a second filter portion 13 connected to the clamping portion 11 are formed at two ends of the filter membrane member 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 unit 12 refers to a portion on the left side of the central tube assembly 40, and the second filter unit 13 refers to a portion on the right side of the central tube assembly 40, and the length of the first filter unit 12 is the same as that of the second filter unit 13, however, the length of the first filter unit 12 and the length of the second filter unit 13 may be different.

The clamping portion 11 and the filtering portion are part of the filtering membrane member 17, and the clamping portion 11 and the filtering portion are only different regions functionally distinguished from each other. The clamping portion 11 is a portion of the filtering membrane member 17 clamped between the corresponding two center tubes, and the remaining portion is defined as a filtering portion. The clamping portion 11 and the filtering portion are defined only for convenience in describing the structure and rolling process of the filter cartridge, and are not intended to limit the scope of patent protection. The filter parts and the clamping parts 11 are distributed along the length direction perpendicular to the central tube, the width of the clamping parts 11 is the same as the width of the fixed side of the central tube, when the filter element comprises a filter membrane part 17, the clamping parts 11 are positioned in the middle of the filter membrane part 17, and the two ends of the filter membrane part 17 are filter parts. When the filter cartridge includes three or more filter membrane members 17, one end of each filter membrane member 17 serves as the clamping portion 11, and the remaining portion is a filter portion.

It will also be appreciated that the first central tube 41 or the second central tube 42 are provided with first positioning mechanisms at both ends, the first positioning mechanisms being for facilitating the mounting of the central tube to the film rolling machine during the rolling process of the filter element, the first positioning mechanisms being positioning protrusions or positioning grooves. The two ends of the first central tube 41 and the second central tube 42 are respectively provided with a second positioning mechanism, the second positioning mechanisms are used for conveniently buckling the first central tube 41 and the second central tube 42 together, and the second positioning mechanisms are combinations of positioning protrusions and positioning grooves. When the positioning projections 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 projections are provided at both ends of the second center pipe 42.

It will also be appreciated that the cartridge comprises three filter membrane elements 17 and three filter elements, all of which are of different materials. The center tube assembly 40 includes three center tubes (not shown) each having a cross section of a sector shape with a central angle of 120 deg., and the three center tubes are spliced to form a circular tube body. The clamping portion 11 of each filter membrane member 17 is clamped between two adjacent center tubes, and each filter member is disposed between two adjacent clamping portions 11. Because the material of each filtering membrane component 17 is different, the quality of pure water entering the central tube after filtering by the filtering membrane is different, thereby realizing that one filtering core outputs three different qualities of water. Of course, the number of the filtration membrane members 17 and the number of the filtration members are not limited thereto, and are specifically determined according to actual needs.

The water quality can be regulated by adding mineral elements in the related art, but the concentration of the mineral elements is uncontrollable in the mode, and whether the added substances are effective to the human body cannot be proved. The filter element film rolling method can accurately control the amount of mineral substances by changing the type of the filter film and the number of the filter films in the filter element.

It will also be appreciated that, as shown in fig. 4, the winding of the filter portion and the filter member of the filter membrane member 17 around the outer periphery of the center tube assembly 40 is accomplished by a film winding machine, and the center tube assembly 40 is driven to rotate counterclockwise by means of the film winding machine, so that the filter portion and the filter member of the filter membrane member 17 are wound around the outer periphery of the center tube assembly 40. To improve the quality of the filter cartridge, the rotational speed of the center tube assembly 40 should be maintained constant during the rolling process to ensure uniform stress during the filter wrapping process. The rotational speeds of the two ends of the central tube should be kept synchronous during rotation to ensure that the filter parts of the filter membrane part 17 will not deviate from each other during winding.

It will also be appreciated that, as shown in fig. 4, the filtering membrane member 17 includes a fifth filtering membrane 14, and a fifth filtering membrane 15 and a sixth filtering membrane 16 respectively disposed at both sides of the fifth filtering membrane 14. 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 is also understood that the side of the first filtering portion 12 facing away from the first central tube 41 is provided with a first pure water guide 21, and one end of the first pure water guide 21, which is close to the second central tube 42, is clamped between the second central tube 42 and the clamping portion 11.

Here, since the filter membrane member 17 is in a folded state, that is, the first filter member 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 layer of the members is in a curled state, when the first member is on one side of the second member, the first member is always on one side of the second member regardless of the number of curls, and thus the position between the two members is the same regardless of before or after the curling.

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

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

In this embodiment, the first filtering member 20 includes two filtering membranes, i.e., the first filtering membrane 22 and the second filtering membrane 25, and of course, other filtering membranes and pure water guiding cloths may be disposed on the side of the third pure water guiding cloth 27 facing away from the second filtering membrane 25. The more the number of the filtering membranes is, the higher the filtering precision of water is, and the number of the filtering membranes is specifically set according to the water quality requirement which is required to be output.

The filter membranes are folded in half before the filter element is rolled, and the filter screen sandwiched between the filter membranes is placed between the filter membranes during the folding process. In the process of folding the first filtering membrane 22 in half, the first filtering membrane 22 is folded in half along the central line of the width direction of the first filtering membrane 22, and the length of the first filtering membrane 22 is halved after folding in half. The first filter screen 23 is clamped between the folded first filter membranes 22, and the length of the first filter screen 23 is half of the length of the first filter membrane 22. The second filtering membrane 25 is folded in half in the same manner as the first filtering membrane 22, and will not be described in detail herein.

It is understood that the side edges of the second pure water guide 24 are respectively connected with the side edges of the first filtering membrane 22 and the side edges of the second filtering membrane 25 by gluing. In the process of rolling the filter element, glue is applied to the side of the first filter membrane 22, which is away from the first pure water guide 21, according to a preset track. The glue can penetrate the second pure water guide 24, and the side edge of the second pure water guide 24 is adhesively connected with the side edge of the first filtering membrane 22 and the side edge of the second filtering membrane 25. The predetermined track may be rectangular or U-shaped, and in the gluing process, it is necessary to ensure that the glue track is located at the side edge of the filtering membrane, so as to ensure that the other parts are not adhered except the side edge of the second pure water guiding cloth 24, which is adhered to the side edge of the first filtering membrane 22 and the side edge of the second filtering membrane 25 respectively.

Similarly, the side edge of the third pure water guide 27 is connected to the side edge of the second filtering membrane 25 and the side edge of the second filtering section 13 by adhesion, respectively. The side edge of the third pure water guiding cloth 27 is connected with the side edge of the second filtering membrane 25 and the side edge of the second filtering part 13, and the glue spraying mode is the same as the glue spraying mode by spraying glue on the side, away from the second pure water guiding cloth 24, of the second filtering membrane 25 according to a preset track.

Similarly, the side edge of the first pure water guiding cloth 21 is connected with the side edge of the first filtering membrane 22 and the side edge of the fifth filtering membrane 15 through adhesive, and the side edge of the first pure water guiding cloth 21 is connected with the side edge of the first filtering membrane 22 and the side edge of the fifth filtering membrane 15, and the glue spraying manner is the same as the glue spraying manner through glue spraying on the side, away from the first central tube 41, of the first filtering part 12.

It is to be understood that the second filter member 30 includes a fourth pure water cloth 31, a third filter membrane 32, a third filter screen 33, a fifth pure water cloth 34, a fourth filter membrane 35, and a fourth filter screen 36, the fourth pure water cloth 31 is disposed on a side of the second filter portion 13 facing away from the third pure water cloth 27, the folded third filter membrane 32 is disposed on a side of the fourth pure water cloth 31 facing away from the second filter portion 13, the third filter screen 33 is sandwiched between the third filter membranes 32, the fifth pure water cloth 34 is disposed on a side of the third filter membrane 32 facing away from the fourth pure water cloth 31, the folded fourth filter membrane 35 is disposed on a side of the fifth pure water cloth 34 facing away from the third filter membrane 32, and the fourth filter screen 36 is sandwiched between the fourth filter membranes 35. The manner of folding the third filtering membrane 32 and the manner of folding the fourth filtering membrane 35 are the same as the manner of folding the same as described above, and will not be described in detail here.

In the process of rolling the filter element, the filter membranes are placed in such a manner that the end of the filter membrane having the folds is placed on the side close to the central tube. In this embodiment, the second filtering member 30 includes two filtering membranes, namely, the third filtering membrane 32 and the fourth filtering membrane 35, and of course, other filtering membranes and pure water guiding cloths may be disposed on the side of the fourth filtering membrane 35 facing away from the fifth pure water guiding cloth 34. The greater the number of filter membranes, the greater the water filtration accuracy, and the number of filter membranes of the second filter member 30 is specifically set according to the water quality requirement to be output.

It will be appreciated that a sixth pure water guide 37 is provided between the fourth filtering membrane 35 and the first filtering portion 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 cartridge assembly 10. The sixth pure water guide 37 is provided to separate the fourth filter membrane 35 from the sixth filter membrane 16, and forms a water flow path between the fourth filter membrane 35 and the sixth filter membrane 16. The length of the sixth pure water guide 37 is greater than the length of the filtering membrane member 17 such that after the sixth pure water guide 37 is wound around the outer circumference of the central tube assembly 40 along with the filtering portion and the filtering member of the filtering membrane member 17, the sixth pure water guide 37 and the remaining portion may be continuously wound several times around the outer circumference of the cartridge assembly 10, thereby wrapping the filtering membrane member 17 and the filtering member inside such that the fit between the adjacent two filters is tight.

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

It will be appreciated that the filtering precision for water is different due to the different materials of the filtering membrane of the first filtering member 20 and the filtering membrane of the second filtering member 30. The filtering parts arranged between two adjacent filtering parts of the filtering membrane part 17 are different, so that 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 realize different water quality output, the water quality adjustment is not needed 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.

By adopting the filter element provided by the embodiment of the invention, different water qualities can be output only by one filter element, and the filter element rolled by the filter element rolling method provided by the embodiment of the invention is matched with an external adjusting device of the filter element, so that the flow adjustment of various water qualities can be realized, and the stepless adjustment of the desalination rate and ions can be realized.

In order to facilitate understanding of the structure of the filter element, the invention also provides a filter element film rolling method, as shown in fig. 4, which comprises the following steps:

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

placing the clamping portion 11 of the filtering membrane member 17 on a side of the sixth pure water guide 37 facing away from the first center tube 41 along the length direction of the first center tube 41;

gluing according to a predetermined trajectory on the side of the first filter house 12 facing away from the first central tube 41;

a first pure water guide 21 is placed on the side of the first filter portion 12 facing away from the first central tube 41;

the second central tube 42 is placed on one side of the first pure water guide cloth 21 away from the first filtering part 12 and buckled with the first central tube 41, so that the clamping part 11 of the first pure water guide cloth 21 and the clamping part 11 of the filtering membrane part 17 are clamped between the first central tube 41 and the second central tube 42;

the first filtering membrane 22 is arranged on one side of the first pure water guide 21 away from the first filtering part 12;

gluing the side of the first filtering membrane 22 facing away from the first pure water guide 21 according to a preset track;

placing a second pure water guide 24 on a side of the first filtering membrane 22 facing away from the first pure water guide 21;

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

Gluing the side of the second filtering membrane 25 facing away from the second pure water guide 24 according to a preset track;

placing a third pure water guide 27 on a side of the second filtering membrane 25 facing away from the second pure water guide 24;

turning the second filter part 13 around the second central tube 42 to a side of the third pure water guide 27 facing away from the second filtering membrane 25;

the second filter portion 13 is glued on a side facing away from the third pure water guide 27 in a predetermined trajectory.

Placing the fourth pure water guide 31 on a side of the second filtering portion 13 facing away from the third pure water guide 27;

placing the third filtering membrane 32 on the side of the fourth pure water guide 31 facing away from the second filtering section 13;

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

placing a fifth pure water guide 34 on a side of the third filtering membrane 32 facing away from the fourth pure water guide 31;

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

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

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 subassembly 70 is close to the center tube, and water route conversion subassembly 70 and the border sealing fit of mounting hole, and the one end that water route conversion subassembly 70 is close to the center tube is formed with two grafting portions, and the inside cavity of grafting portion communicates with corresponding outlet flow channel 74, and grafting portion inserts in the first end of corresponding center tube to through sealing washer and center tube sealing fit. Of course, the detachable connection method of the waterway conversion assembly 70 and the first end of the central tube is not limited to the above-described insertion method, and the inner diameter of the insertion portion may be set larger than the outer diameter of the central tube, and the first end of the central tube may be inserted into the insertion portion.

It can be understood that two positioning members are formed on the 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, and of course, the connection mode of the positioning members and the second end cover 63 is not limited to this, and threads can be provided on the inner wall of the water passing hole, and the positioning members can be installed in the water passing hole through the threads. One of the positioning members is hollow in the interior, and the two positioning members are inserted into the second ends of the corresponding central tubes, and the hollow positioning members in the interior communicate the second ends of the central tubes with the water storage cavity 56. In order to facilitate the installation of the second end cap 63 at the second end of the filter element assembly 10, the edge of the locating piece far away from one end of the second end cap 63 is provided with a guiding inclined plane, the guiding inclined plane is arranged to reduce the outer diameter of the locating piece far away from one end of the second end cap 63, so that the locating piece is conveniently inserted into a corresponding central tube, and meanwhile, the guiding inclined plane plays a guiding role in the inserting process, so that the locating piece can be quickly inserted into place.

In order to facilitate understanding of the working principle of the filter element, the working principle of the filter element will be described with reference to fig. 1 and 2.

Raw water (single solid arrow) firstly enters the water inlet channel 73 through the water inlet port 53, then enters the first end of the filter element assembly 10 through the first water inlet 64, and 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 due to the sealing fit of the filter element assembly 10 and the inner wall of the fresh-keeping bin assembly. Meanwhile, part of water flows into the central tube along the radial direction of the filter element assembly 10, in the process of flowing into the central tube, due to different materials of the filtering components, pure water with two different water qualities can be formed, namely, first pure water (wide solid arrow) and second pure water (wide hollow arrow), after the first pure water enters the corresponding central tube, 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 passage 74 through the first end of the central tube and finally is 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 passage 74 through the first end of the central tube, and finally is output through the corresponding water outlet port 55. The wastewater (single line open arrow) generated during the filtration process enters the wastewater channel 72 through the first water outlet and is finally output through the wastewater port 54.

The invention also provides water purifying equipment, which comprises a shell and any filter element, wherein the filter element is arranged in the shell. By using the filter element, the stability of the water purifying equipment is effectively improved, the volume of the water purifying equipment is reduced, and the product competitiveness is enhanced.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A filter cartridge, comprising:

a housing formed with a water inlet port and at least two water outlet ports;

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

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 part, and the two ends of the filtering membrane component form a first filtering part and a second filtering part which are connected with the clamping part; the clamping part is clamped between the first central tube and the second central tube;

a first pure water guide cloth is arranged on one side, away from the first central tube, of the first filtering part, and one end, close to the second central tube, of the first pure water guide cloth is clamped between the second central tube and the clamping part;

The filter element comprises a first filter component and a second filter component, the first filter component is positioned at one side of the first pure water guide cloth, which is away from the first filter part, and the second filter component is positioned at one side of the second filter part, which is away from the first pure water guide cloth;

the first filtering component comprises a first filtering membrane, a first filtering screen, a second pure water guide cloth, a second filtering membrane, a second filtering screen and a third pure water guide cloth, the first filtering membrane is folded in half, the first filtering membrane is arranged on one side, deviating from the first filtering part, of the first pure water guide cloth, the first filtering screen is clamped between the first filtering membranes, the second pure water guide cloth is arranged on one side, deviating from the first pure water guide cloth, of the first filtering membrane, the second filtering membrane is folded in half, the second filtering membrane is arranged on one side, deviating from the first filtering membrane, of the second pure water guide cloth, the second filtering screen is clamped between the second filtering membranes, and the third pure water guide cloth is arranged on one side, deviating from the second pure water guide cloth, of the second filtering membrane;

the second filtering component comprises a fourth pure water guide cloth, a third filtering membrane, a third filtering screen, a fifth pure water guide cloth, a fourth filtering membrane and a fourth filtering screen, wherein the fourth pure water guide cloth is arranged on one side, deviating from the third pure water guide cloth, of the second filtering portion, the third filtering membrane which is folded in half is arranged on one side, deviating from the second filtering portion, of the fourth pure water guide cloth, the third filtering screen is clamped between the third filtering membranes, the fifth pure water guide cloth is arranged on one side, deviating from the fourth pure water guide cloth, of the third filtering membrane, the fourth filtering membrane which is folded in half is arranged on one side, deviating from the third filtering membrane, of the fifth pure water guide cloth, and the fourth filtering screen is clamped between the fourth filtering membranes;

A sixth pure water guide cloth is arranged between the fourth filtering membrane and the first filtering part, a first end of the sixth pure water guide cloth is connected with the first central tube, and a second end of the sixth pure water guide cloth is wound on the outer peripheral surface of the filter element assembly;

the filtering membrane component comprises a fifth filtering membrane and a sixth filtering membrane which are respectively arranged at two sides of the fifth filtering membrane; the fifth filtering membrane and the first filtering component are positioned on one side of the fifth filtering screen, and the sixth filtering membrane and the second filtering component are positioned on the other side of the fifth filtering screen;

the first filtering component is clamped between the fifth filtering membranes, one part of the sixth filtering membrane is positioned at one side of the second filtering part, which is away from the first filtering part, and the other part of the sixth filtering membrane is positioned at one side of the first filtering part, which is away from the second filtering part.

2. The filter cartridge of claim 1, wherein the fresh cartridge assembly comprises:

3. The filter element according to claim 2, wherein the fresh-keeping bin body comprises a colloid and a flexible connecting piece wound on the outer peripheral surface of the filter element assembly, the colloid is coated on the outer peripheral surface of the filter element assembly, and the flexible connecting piece is embedded in the colloid.

4. The filter cartridge of claim 2, wherein the fresh cartridge body has a thickness of 1-3mm.

5. The filter cartridge of claim 2, further comprising:

6. The filter cartridge of claim 5, wherein the first end cap defines a mounting aperture, and wherein an end of the waterway conversion assembly adjacent to the central tube is threaded through the mounting aperture and is removably coupled to the first end of the central tube.

7. A water purification apparatus comprising a housing and the cartridge of any one of claims 1 to 6, the cartridge being disposed within the housing.