CN217838539U

CN217838539U - Filter core device, center tube and water purification unit

Info

Publication number: CN217838539U
Application number: CN202222000527.7U
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: 2022-11-18
Anticipated expiration: 2032-07-29

Abstract

The utility model relates to a water purification technology field provides a filter core device, center tube and water purification unit. The filter element device comprises a central tube assembly and a filter element assembly, wherein the central tube assembly is formed by splicing at least two central tubes extending along the same direction, and two adjacent central tubes are connected through a clamping part; the filter element assembly is wound around the periphery of the center tube assembly. According to the filter element device provided by the embodiment of the utility model, the clamping component is adopted to connect two adjacent central pipes together, so that the filter element component is tightly clamped between the two adjacent central pipes, and the filter element component is prevented from shifting in the process of rolling the filter element; two adjacent center tubes pass through the joint part and connect, and the filter core system in-process need not to fix every center tube, and it is more convenient to operate.

Description

Filter core device, center tube and water purification unit

Technical Field

The utility model relates to a water purification technology field especially relates to a filter core device, center tube and water purification unit.

Background

The domestic water purification market is mainly reverse osmosis water purification equipment at present, the reverse osmosis water purification equipment is deeply loved by users due to extremely high filtration precision and long service cycle, the market proportion reaches more than 90 percent, along with 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 is mainly realized through a water quality adjusting filter element, a plurality of central tubes are arranged inside the water quality adjusting filter element, and in the process of rolling the filter element, because the central tubes are not effectively fixed with the central tubes, the problem that the central tubes cannot effectively clamp the filter element exists in the process of rolling the filter element; the operation is very inconvenient because other central tubes need to be fixed by hands or tools in the process of rolling the filter element.

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 filter core device for there is the center tube to carry out effectual centre gripping to the filter core in solving the correlation technique, and the inconvenient problem of system process operation is rolled up to the filter core.

The utility model discloses still provide a center tube.

The utility model discloses still provide a water purification unit.

According to the utility model discloses a filter core device of first aspect embodiment includes:

the central pipe assembly is formed by splicing at least two central pipes extending along the same direction, and every two adjacent central pipes are connected through a clamping component;

and the filter element component is wound on the periphery of the central pipe component.

According to the filter element device provided by the embodiment of the utility model, the clamping component is adopted to connect two adjacent central pipes together, so that the filter element component is tightly clamped between the two adjacent central pipes, and the filter element component is prevented from shifting in the process of rolling the filter element; two adjacent center tubes pass through the joint part and connect, and the filter core system in-process need not to fix every center tube, and it is more convenient to operate.

According to the utility model discloses an embodiment, the center tube subassembly includes first center tube and second center tube, the joint part including set up in the block tongue of the at least one end of second center tube, the at least one end of first center tube is formed with the draw-in groove, block tongue joint in corresponding in the draw-in groove.

According to the utility model discloses an embodiment, first center tube orientation one side of second center tube is formed with the edge the first constant head tank that the length direction of first center tube extends, the second center tube inlays to be located in the first constant head tank.

According to the utility model discloses an embodiment, the lateral wall of draw-in groove is formed with the second constant head tank, at least one side of block tongue is formed with the location arch, the location arch inlays and locates correspondingly in the second constant head tank.

According to the utility model discloses an embodiment, the at least one end of first center tube is formed with location portion.

According to the utility model discloses an embodiment, first center tube with the second center tube is formed with a plurality of inlet openings in the one side that deviates from each other.

According to the utility model discloses an embodiment, the filter element group spare includes filtering membrane part and two at least different filter element parts, filtering membrane part's clamping part is followed the length direction centre gripping of center tube is in adjacent two between the center tube, filter element set up in between two adjacent filter element of filtering membrane part, filtering membrane part's filter element with filter element convolutes in the periphery of center tube subassembly.

According to an embodiment of the present invention, 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 connected with the clamping part; 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 an embodiment of the present invention, the filter element assembly includes a first filter element and a second filter element, the first filter element is located the first pure water guide deviates from one side of the first filter portion, the second filter element is located the second filter portion deviates from one side of the first pure water guide.

According to the utility model discloses an embodiment, first filter unit include pure water lead cloth, the filtration membrane of fifty percent discount and centre gripping in filter screen between the filtration membrane, filtration membrane with pure water lead cloth set gradually in turn set up in first pure water lead cloth deviates from one side of first filter house.

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 the utility model discloses an embodiment still includes:

fresh-keeping storehouse subassembly, inside is formed with the cavity, filter element group spare set up in the cavity, fresh-keeping storehouse subassembly is formed with first water inlet.

According to the utility model discloses second aspect embodiment the center tube subassembly, the center tube subassembly comprises two piece at least center tubes concatenation that extend along same direction, adjacent two connect through joint part between the center tube.

According to the utility model discloses water purification unit of third aspect embodiment, including casing and above-mentioned arbitrary one the filter core device, the filter core device 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:

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 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 perspective view of a center tube assembly according to an embodiment of the present invention;

fig. 2 is a side view, cross-sectional, structural schematic diagram of a center tube assembly provided by an embodiment of the present invention;

figure 3 is a cross-sectional structural schematic view of a center tube assembly provided by an embodiment of the present invention;

fig. 4 is a schematic side view of a first center tube according to an embodiment of the present invention;

fig. 5 is a schematic side view, sectional structure of a filter element provided by the embodiment of the present invention;

FIG. 6 is an enlarged partial schematic view of FIG. 5 at A;

fig. 7 is a schematic structural diagram of a cover body according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a filter element assembly rolling process provided by an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a fresh-keeping bin assembly provided by the embodiment of the present invention.

Reference numerals are as follows:

10. a filter element assembly; 11. a clamping portion; 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 guiding; 30. a second filter element; 31. fourth pure water 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 guiding; 40. a central tube assembly; 41. a first center tube; 42. a second center tube; 43. a card slot; 44. a latch; 45. a first positioning groove; 46. a second positioning groove; 47. positioning a projection; 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 channel; 74. and a water outlet flow passage.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are intended 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 as specific cases to those of ordinary skill 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 being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Fig. 1 illustrates a schematic perspective view of a center tube assembly according to an embodiment of the present invention, and fig. 2 illustrates a schematic side view cross-sectional structure of the center tube assembly according to an embodiment of the present invention; as shown in fig. 1 and 2, the filter cartridge assembly includes a central tube assembly 40 and a filter cartridge assembly 10, the central tube assembly 40 is formed by splicing at least two central tubes extending along the same direction, two adjacent central tubes are connected by a clamping member, and the filter cartridge assembly 10 is wound around the periphery of the central tube assembly 40.

According to the filter element device provided by the embodiment of the utility model, the two adjacent central pipes are connected together by the clamping component, and the filter element component 10 is tightly clamped between the two adjacent central pipes, so that the filter element component 10 is prevented from shifting in the process of rolling the filter element; two adjacent center tubes pass through the joint part and connect, and the filter core system in-process need not to fix every center tube, and it is more convenient to operate.

It can be understood that fig. 3 illustrates a cross-sectional structural schematic view of a center tube assembly provided in an embodiment of the present invention, as shown in fig. 3, the center tube assembly 40 includes a first center tube 41 and a second center tube 42, the first center tube 41 and the second center tube 42 are both semicircular tubes, and the first center tube 41 and the second center tube 42 are spliced to form a center tube assembly 40 with a circular cross-section. The clamping component comprises clamping tongues 44 arranged at two ends of the second central tube 42, the clamping tongues 44 and the first central tube 41 are integrally formed, two clamping tongues 44 are arranged at two ends of the first central tube 41, and the two clamping tongues 44 are arranged at intervals. Of course, it is also possible to provide the second center tube 42 with a latch 44 at one end and connect the other end to the first center tube 41 in other ways. The number of the locking tongues 44 at each end of the central tube is not limited to two, and one, three or more may be provided.

The two ends of the first central tube 41 are both formed with locking grooves 43, the number of the locking grooves 43 is the same as that of the locking tongues 44, and the number of the locking grooves 43 corresponds to the positions of the locking tongues 44 one by one. The clamping tongues 44 are clamped in the corresponding clamping grooves 43, so that the two adjacent central pipes are quickly connected, the installation steps of the central pipes are simplified, and the operation is more convenient.

It can be understood that fig. 4 illustrates a schematic side view of the first center tube according to an embodiment of the present invention, as shown in fig. 4, a length of the first center tube 41 is greater than a length of the second center tube 42, a first positioning groove 45 extending along a length direction of the first center tube 41 is formed on a side of the first center tube 41 facing the second center tube 42, and the second center tube 42 is embedded in the first positioning groove 45. The provision of the snap member enables the first center tube 41 and the second center tube 42 to be connected together, preventing the two center tubes from being separated in the radial direction. The second center tube 42 is fitted in the first positioning groove 45, so that the second center tube 42 and the first center tube 41 are prevented from being misaligned in the longitudinal direction of the center tube assembly 40.

It can be understood that the two side walls of the locking slot 43 are respectively formed with a second positioning slot 46, the two sides of the locking tongue 44 are respectively formed with a positioning protrusion 47, and the positioning protrusions 47 are embedded in the corresponding second positioning slots 46. The positioning protrusion 47 is engaged with the second positioning groove 46, so that the latch 44 is locked in the slot 43, and the latch 44 is prevented from being separated from the slot 43. Of course, the second positioning groove 46 may be provided only on one side wall of the card slot 43, and correspondingly, the positioning protrusion 47 may be provided only on one side of the card tongue 44.

It will be understood that at least one end of the first center tube 41 is formed with a positioning portion, which is a positioning hole, and in this embodiment, the positioning portion is a section of the inner flow passage of the center tube at the end of the center tube. The locating holes are suitable for being matched with locating pieces of the film rolling machine to fix the central tube assembly 40. Of course, the specific type of the positioning portion is not limited to the positioning hole, and may be the positioning protrusion 47.

It will be understood that the first center tube 41 and the second center tube 42 are formed with a plurality of water inlet holes, respectively, on sides facing away from each other. The inlet openings are circular openings and a plurality of inlet openings are spaced equidistantly along the length of the center tube assembly 40.

It can be understood that the filter cartridge assembly further comprises a fresh keeping bin assembly, a cavity is formed inside the fresh keeping bin assembly, the filter cartridge assembly 10 is arranged in the cavity, and the fresh keeping bin assembly is formed with the first water inlet 64.

According to the filter element device of the embodiment of the present invention, fig. 5 illustrates a schematic side view cross-sectional structure of the filter element provided by the embodiment of the present invention, fig. 6 illustrates a schematic partial enlarged structure at a in fig. 5, as shown in fig. 5 and fig. 6, the filter element assembly 10 includes a filter membrane component 17 and at least two different filter components; the clamping part 11 of the filtering membrane component 17 is clamped between two adjacent central pipes along the length direction of the central pipes, the filtering membrane component is arranged between two adjacent filtering parts of the filtering membrane component 17, and the filtering part and the filtering component of the filtering membrane component 17 are wound on the outer periphery of the central pipe assembly 40.

Because the filtering parts arranged between the two adjacent filtering parts of the filtering membrane part 17 are different, the water quality output to the central tube after filtering is different, and the purpose that one 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 water purification unit's volume, simplified water purification unit's structure. It will be appreciated that the cartridge assembly further includes a housing 50, as shown in fig. 5, the housing 50 being formed with a water inlet port 53 and at least two water outlet ports 55. The fresh food compartment assembly is disposed inside the housing 50, and the first water inlet 64 is in communication 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 first cup of water, a water storage chamber 56 is formed between the fresh food bin assembly and the housing 50 adapted to store water, with a second end of one of the center tubes communicating with the water storage chamber 56.

It should be noted that, the first central tube or the second central tube may be in communication with the water storage cavity 56.

According to the utility model discloses the filter core, as shown in fig. 5, set up fresh-keeping storehouse subassembly through the outside at filter core 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 purification unit use in filter core subassembly 10 filtration after partial pure water can enter into water storage chamber 56 and save, when shutting down, the pure water is closed, raw water end pressure disconnection, the pure water slowly descends under atmospheric pressure, 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, the pure water in the water storage cavity 56 is output through the first end of the central pipe and the water outlet port 55 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 purifying device 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 sealingly engaged with the inner wall of the fresh food compartment assembly. The inside back of fresh-keeping storehouse subassembly is got into through first water inlet 64 to raw water, because the sealed cooperation of the inner wall of filter element group spare 10 with the fresh-keeping storehouse subassembly, partial raw water can only flow to the second end of filter element group spare 10 along the length direction of filter element group spare 10, and partial raw water flows into the center tube along the radial direction of filter element group spare 10 simultaneously.

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 assembly being disposed within the housing 50, the crisper assembly 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. 5, the housing 50 comprises a housing body 51 and a cover 52, the housing 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 regular polygon cross section, 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. 7 illustrates a schematic structural diagram of a cover body provided in an embodiment of the present invention, and as shown in fig. 7, 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.

Because adopt pure water backward flow, two membrane each other towards, water drive jar washes the problem of solving first cup of water among the correlation technique usually, though obtained certain effect, but there are waste water many, and the noise is big, and the complete machine is bulky, and the complicated unreliable problem of system. 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 has high requirements and needs food-grade environment-friendly colloid. 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. 9 illustrates the structural schematic diagram of the fresh-keeping bin assembly provided by the embodiment of the present invention, as shown in fig. 5 and fig. 9, 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 component 10 can be connected by gluing, and can be matched in a sealing way by 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 raw water gets into filter element group spare 10 through setting up in the first water inlet 64 of outward flange, can increase raw water at the radial ascending flow distance of filter element group spare 10, has strengthened the purifying effect of filter element. In order to increase the water inflow 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, and the first water outlet is located the position that the first end cover 62 opened into the mounting hole, and first water outlet arranges around the mounting hole, and 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 seals the cooperation with the second end of filter element subassembly 10 respectively, and second end cover 63 can have the multiple with the sealed cooperation mode of filter element subassembly 10 second end, can be sealed through gluing, also can be through setting up the protruding stupefied of annular in one side of second end cover 63 orientation filter element subassembly 10, and the second end through the protruding stupefied embedding filter element subassembly 10 of annular realizes sealed cooperation. The second end cap 63 is also in sealing fit with the fresh food compartment body 61, and the sealing fit between the second end cap 63 and the fresh food compartment body 61 is the same as the sealing fit between the first end cap 62 and the fresh food compartment 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. 9, the fresh food compartment 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 capacity of the water storage cavity 56 is, and the thickness of the fresh-keeping bin body 61 in the embodiment is 1-3mm. Because the fresh-keeping bin body 61 needs to bear large pressure fluctuation in the using process, 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 level glue, adopts food level's glue preparation fresh-keeping storehouse body 61, can avoid the problem that the pure water in the filter core has the peculiar smell, has improved the quality of drinking water, has strengthened the user experience and has felt, has improved product competitiveness.

In order to conveniently know the advantage of 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 principal ingredients 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 it should be noted here that 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 the glue besides the strength of the flexible connecting piece 65. The curing strength of the glue in this embodiment is 5Mpa, but of course, the curing strength of the glue 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. 9, 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) starting from the starting point of the first end cover 62, feeding the glass fiber impregnated with the AB glue while rotating by using automatic equipment, winding the glass fiber with the AB glue on the outer peripheral surface of the filter element component 10, and winding for 2-3 circles in a reciprocating manner.

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. 5, 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 here that, in the embodiments of the present invention, different filter elements refer to different materials of the filter membrane in the filter element. 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 component can not change the water quality, the pure water guide cloth in different filtering components 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. 5, 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, 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 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 fan shape, and when the circle center angles of all the fan shapes are the same, the more the number of the central tubes is, the smaller the circle center angle of each fan shape is. Of course, the central angles of the sectors may be different, and 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 cross-sectional shape of the base pipe is not limited to this, and may be regular triangle or trapezoid, and the cross-section of the base pipe assembly 40 formed by splicing the base pipes is regular polygon.

It will be appreciated that the first centre tube 41 and the second centre tube 42 are each sector of a semi-circle in cross-section, as shown in figure 5. 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 both 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 cylindrical.

Fig. 8 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. 8, the filter element assembly includes a filter membrane 17, a clamping portion 11 is formed at a middle portion of the filter membrane 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 17, and the clamping portion 11 is clamped between a first central tube 41 and a second central tube 42. As shown in fig. 8, the first filter part 12 refers to a portion of the left side of the center tube assembly 40, and the second filter part 13 refers to 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 unit 17 clamped between the corresponding two center 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 perpendicular to the central pipe, the width of the clamping part 11 is the same as that of the fixed side of the central pipe, when the filter element assembly comprises one filter membrane part 17, the clamping part 11 is 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 core assembly 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 used as 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 assembly comprises three filter membrane elements 17 and three filter elements, the three filter elements being 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 part 11 of each filtering membrane part 17 is clamped between two adjacent central pipes, and each filtering membrane part is arranged between two adjacent clamping parts 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 membrane method is rolled up to filter core can the accurate control quantity of mineral substance through the type that changes filtration membrane and filtration membrane's quantity in the filter unit.

It can also be understood that, as shown in fig. 8, the winding of the filtering portion and the filtering part of the filtering membrane part 17 on the outer circumference of the central tube assembly 40 is completed by a membrane winding machine, and the filtering portion and the filtering part of the filtering membrane part 17 are wound on the outer circumference of the central tube assembly 40 by driving the central tube assembly 40 to rotate counterclockwise by means of the membrane winding machine. 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. 8. 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 filter part 12 facing away from the first center tube 41 is provided with the first pure water guide cloth 21, and one end of the first pure water guide cloth 21 near the second center tube 42 is clamped between the second center tube 42 and the clamping part 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 is also understood that the filter cartridge assembly includes a first filter member 20 and a second filter member 30, the first filter member 20 being located at a side of the first pure water guide 21 facing away from the first filter part 12, and the second filter member 30 being located at a side of the second filter part 13 facing away from the first pure water guide 21. As shown in fig. 8, 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 the first filtering component comprises a pure water guide cloth, a folded filtering membrane and a filter screen clamped between the filtering membranes, and the filtering membranes and the pure water guide cloth are sequentially and alternately arranged on one side of the first pure water guide cloth 21 departing from the first filtering part. That is, a filtration membrane is provided, a pure water guide is provided on the side of the filtration membrane facing away from the first pure water guide 21, and the above steps are repeated in sequence. The quantity of cloth is led with the pure water to filtration membrane in this embodiment is two-layer, specifically sets for as required the quality of water demand of exporting.

It can also be understood that, as shown in fig. 8, 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 filtering membrane is folded in half before the filter element is rolled, and the filter net clamped between the filtering membranes is placed between the filtering 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 manner as the first filter membrane 22, and will not be described in detail.

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. The glue may penetrate the second pure water guide 24 and adhesively bond the sides of the second pure water guide 24 to the sides of the first filter membrane 22 and to the sides 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 also be understood that the second filtering component comprises a pure water cloth guide, a folded filtering membrane and a filtering net clamped between the filtering membranes, and the pure water cloth guide and the filtering membranes are sequentially and alternately arranged on one side of the second filtering portion 13, which is far away from the third pure water cloth guide 27. Namely, a layer of pure water guide cloth is arranged, a layer of filtering membrane is arranged on the side of the pure water guide cloth, which is far away from the second filtering part 13, and the steps are sequentially repeated. The quantity of cloth is led with the pure water to filtration membrane in this embodiment is two-layer, specifically sets for as required the quality of water demand of exporting.

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 folding of the third filter membrane 32 and the folding of the fourth filter membrane 35 are 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 filter membrane 35 and the first filter unit 12, a first end of the sixth pure water guide 37 is connected to the first center pipe 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 thereto, 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 regulation 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 purifying equipment is effectively reduced, and the structure of the water purifying equipment 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. 8, 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 central tube 42 on the side of the first pure water guide cloth 21 away from the first filter part 12, and connecting the second central tube with the first central tube 41 through a clamping part, so that the clamping part 11 of the first pure water guide cloth 21 and the clamping part 11 of the filter membrane part 17 are clamped between the first central tube 41 and the second central 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;

turning over the second filter part 13 around the second central tube 42 to the side of the third pure water guide 27 facing away from the second filter 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 31 is placed on the side of the second filter unit 13 away from the third pure water guide 27;

the third filtration membrane 32 is placed on the side of the fourth pure water guide 31 away from the second filtration 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. 5 and 6, the cartridge assembly further includes a waterway conversion assembly 70, and a mounting cavity 71 is formed on a side of the first end cover 62 facing away from the cartridge assembly 10, and an end of the mounting cavity 71 facing away from the first end cover 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 arranged in installation cavity 71, waterway conversion assembly 70 and installation cavity 71 are coaxially arranged, 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, shell 50 is formed with a wastewater port 54, and wastewater channel 72 is respectively communicated with wastewater port 54 and a 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 of the waterway conversion assembly 70 to the first end of the central tube is not limited to the above-mentioned insertion method, and the first end of the central tube may be inserted into the insertion part by setting the inner diameter of the insertion part to be larger than the outer diameter of the central tube.

It can be understood that two positioning members are formed on one side of the second end cap 63 facing the filter element assembly 10, the positioning members and the second end cap 63 are integrally formed, but the connection mode of the positioning members and the second end cap 63 is not limited thereto, and a thread may be provided on the inner wall of the water through hole, and the positioning members are installed in the water through hole by the thread. 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.

To facilitate understanding of the operating principle of the filter cartridge, the operating principle of the filter cartridge will be described below with reference to fig. 5 and 6.

Raw water (single-line solid arrow) enters the water inlet flow 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 pipe along the radial direction of the filter element assembly 10, and in the process of flowing to the central pipe, two kinds of pure water with different water qualities can be formed due to different materials of the filter element, namely first pure water (wide-line solid arrows) and second pure water (wide-line hollow arrows), after the first pure water enters the corresponding central pipe, one part of the first pure water in the central pipe 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 pipe and is finally output through the water outlet port 55. After the second pure water enters the corresponding central pipe, all the second pure water in the central pipe enters the corresponding water outlet flow channel 74 through the first end of the central pipe, and finally is 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 center tube subassembly, center tube subassembly constitute by two piece at least center tubes concatenations that extend along same direction, connect through the joint part between two adjacent center tubes.

The utility model also provides a water purification unit, including casing and an above-mentioned arbitrary embodiment the filter core device, the filter core device sets up in the casing.

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, it should be understood by those skilled in the art 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

1. A filter cartridge assembly, comprising:

2. The filter cartridge device of claim 1, wherein the center tube assembly comprises a first center tube and a second center tube, the clamping component comprises a clamping tongue arranged at least one end of the second center tube, at least one end of the first center tube is provided with a clamping groove, and the clamping tongue is clamped in the corresponding clamping groove.

3. A filter cartridge device as recited in claim 2, wherein a side of the first center tube facing the second center tube is formed with a first positioning groove extending along a length of the first center tube, and the second center tube is fitted in the first positioning groove.

4. The filter element device according to claim 2, wherein a second positioning groove is formed on a side wall of the clamping groove, a positioning protrusion is formed on at least one side of the clamping tongue, and the positioning protrusion is embedded in the corresponding second positioning groove.

5. A filter cartridge arrangement as claimed in any one of claims 2 to 4, wherein at least one end of the first centre tube is formed with a locating portion.

6. A filter cartridge arrangement according to any one of claims 2-4, characterised in that the first and second central tubes are each formed with a plurality of inlet openings on the sides facing away from each other.

7. The filter cartridge assembly of any one of claims 2-4, wherein the filter cartridge assembly comprises a filter membrane member and at least two different filter members, wherein the clamping portion of the filter membrane member is clamped between two adjacent central tubes along the length direction of the central tubes, the filter members are disposed between two adjacent filter portions of the filter membrane member, and the filter portions of the filter membrane member and the filter members are wound around the outer circumference of the central tube assembly.

8. The filter cartridge device of claim 7, wherein the middle portion of the filter membrane member forms the clamping portion, and the two 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.

9. A filter element arrangement according to claim 8, characterised in that the side of the first filter house facing away from the first centre tube is provided with a first pure water lead, one end of which, close to the second centre tube, is clamped between the second centre tube and the clamping part.

10. The filter cartridge arrangement of claim 9, wherein the filter cartridge assembly includes a first filter component located on a side of the first cloth filter facing away from the first filter portion and a second filter component located on a side of the second cloth filter facing away from the first cloth filter portion.

11. The filter cartridge device of claim 10, wherein the first filter component comprises a pure water guide, a folded filter membrane and a filter screen clamped between the filter membranes, and the filter membranes and the pure water guide are alternately arranged on one side of the first pure water guide, which is far away from the first filter part.

12. The filter cartridge assembly of claim 10, wherein the first filter element includes 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 retained 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 retained 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.

13. A filter cartridge arrangement according to any one of claims 1-4 further including:

14. The utility model provides a center tube subassembly which characterized in that, the center tube subassembly comprises two piece at least center tubes concatenation that extend along the equidirectional, adjacent two connect through joint part between the center tube.

15. A water purification apparatus comprising a housing and a filter element arrangement as claimed in any one of claims 1 to 13, the filter element arrangement being disposed within the housing.