Front filter element and water purification equipment with front filter element
By designing a pre-filter with a multi-layered membrane bag structure and a water-guiding structure, the problems of small filtration area, low dirt holding capacity, and short life of PP cotton filter cartridges have been solved, achieving a larger filtration area, higher flow rate, and longer life.
Patent Information
- Application Number
- CN202520443845.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-02-27
- Estimated Expiration
- 2035-03-13
AI Technical Summary
Existing PP cotton pre-filters have limited filtration area, small dirt holding capacity and throughput, and short lifespan.
A pre-filter cartridge is designed, comprising multiple stacked membrane bags, each consisting of two stacked membrane sheets. The first and third sides of the membrane sheets are not adjacent, forming multiple filtration surfaces, increasing the filtration area and dirt holding capacity. The water flow direction is optimized through a water guiding structure to reduce water flow resistance.
It significantly increases the filtration area and dirt holding capacity, improves the flow rate, extends the service life of the filter element, and maintains the stability and smoothness of the water flow.
Smart Images
Figure CN223945394U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to filter core technical field, and specifically provide a front filter core and have the water purification equipment of this front filter core. BACKGROUND
[0002] In recent years, people's living standards are constantly improved, and people pay more and more attention to drinking water health, and water purifiers gradually become more and more common household appliances.
[0003] In the water purification equipment using reverse osmosis filter core, the upstream pipeline of the reverse osmosis filter core is usually provided with a front filter core, and tap water is filtered through the front filter core first and then through the reverse osmosis filter core. The front filter core is usually a PP cotton filter core, which is used to remove suspended solids, large particles, rust and the like in water. However, the filtering surface of the PP cotton filter core is only the outer circumferential surface of the PP cotton structure, and the trapped pollutants accumulate on the outer circumferential surface of the PP cotton. The filtering area of the PP cotton filter core is limited, the pollutant carrying capacity and flux are small, and the service life is short.
[0004] Therefore, there is a need in the art for a new technical solution to solve the above problems. UTILITY MODEL CONTENT
[0005] The utility model aims at solving the above technical problems, i.e. solving the problems of limited filtering area, small pollutant carrying capacity and flux, and short service life of the existing PP cotton front filter core.
[0006] In a first aspect, the utility model provides a front filter core, which comprises a membrane structure, a first end cover and a second end cover respectively arranged on a first side and a third side of the membrane structure, and a water barrier structure wrapped on other sides of the membrane structure except the first side and the third side and sealingly connected with edges of the first end cover and the second end cover, and first and second through holes are respectively formed in the first end cover and the second end cover; the membrane structure comprises a plurality of membrane bags stacked, each of which comprises two stacked membrane sheets; in each of the membrane bags, first side edges of the two membrane sheets form a first opening at a first side edge of the membrane bag, and the remaining side edges are respectively connected to form corresponding side edges of the membrane bag; a second opening is formed between third side edges of adjacent membrane bags, and the remaining side edges are respectively connected; the first side edge and the third side edge of the membrane bag are respectively located on the first side and the third side of the membrane structure, and the four peripheral edges of the first side of the membrane structure are sealingly connected with the inner wall of the first end cover or the water barrier structure, and the four peripheral edges of the third side of the membrane structure are sealingly connected with the inner wall of the second end cover or the water barrier structure; wherein the membrane sheet has at least four side edges, and the first side edge and the third side edge of the membrane sheet are not adjacent.
[0007] In the preferred technical scheme of the pre-filter, the pre-filter comprises a shell composed of the first end cover, the second end cover and a shell body connected with the first end cover and the second end cover, and the shell body is sleeved outside the water-proof structure.
[0008] In the preferred technical scheme of the pre-filter, the pre-filter comprises a shell composed of the first end cover, the second end cover and the water-proof structure.
[0009] In the preferred technical scheme of the pre-filter, the water-proof structure is a flexible film wrapped around the sides of the membrane structure except the first side and the third side.
[0010] In the preferred technical scheme of the pre-filter, all the membrane sheets in the plurality of membrane bags are formed by folding one membrane sheet.
[0011] In the preferred technical scheme of the pre-filter, a first water guide structure is arranged between the two membrane sheets of each membrane bag; and / or a second water guide structure is arranged between adjacent membrane bags.
[0012] In the preferred technical scheme of the pre-filter, the first water guide structure is a water guide cloth or a grid; and / or the second water guide structure is a water guide cloth or a grid; and / or the thickness of the water guide structure for guiding raw water in the first water guide structure and the second water guide structure is greater than the thickness of the water guide structure for guiding clean water.
[0013] In the preferred technical scheme of the pre-filter, the material of the membrane sheet is non-woven fabric, microfiltration membrane, ultrafiltration membrane or nanofiltration membrane.
[0014] In the preferred technical scheme of the pre-filter, the shape of the membrane sheet is rectangular, trapezoidal or other quadrilateral.
[0015] In the technical scheme, the pre-filter cartridge comprises a membrane structure, first and second end covers respectively arranged at first and third sides of the membrane structure, and a water-proof structure wrapped on other sides of the membrane structure except the first and third sides and sealedly connected with edges of the first and second end covers; the first and second end covers are respectively provided with first and second through holes; the membrane structure comprises a plurality of membrane bags stacked together, each of the membrane bags comprises two stacked membrane sheets; in each of the membrane bags, first openings are formed between first side edges of the two membrane sheets at first side edges of the membrane bag, and the remaining side edges are connected to form corresponding side edges of the membrane bag; second openings are formed between third side edges of adjacent membrane bags, and the remaining side edges are connected; the first and third side edges of the membrane bag are respectively located at the first and third sides of the membrane structure, and the four edges of the first side of the membrane structure are sealedly connected with the inner wall of the first end cover or the water-proof structure, and the four edges of the third side of the membrane structure are sealedly connected with the inner wall of the second end cover or the water-proof structure; wherein the membrane sheet has at least four side edges, and the first and third side edges of the membrane sheet are not adjacent.
[0016] In use of the pre-filter cartridge, one of the first and second through holes is used as a water inlet, and the other is used as a water outlet; water flows into the water inlet, is filtered by the membrane sheets of the membrane structure, and then flows out of the water outlet. When the first and second through holes are respectively used as the water inlet and the water outlet, water flows from the first through hole to the first openings and then flows into the membrane bags through the first openings, and then passes through the membrane sheets and flows into the spaces between adjacent two membrane bags; impurities in the water are trapped in the membrane bags, and the water (i.e. filtered water) flowing into the spaces between adjacent two membrane bags flows out of the second through hole through the second openings. When the first and second through holes are respectively used as the water outlet and the water inlet, water flows into the second through hole, flows to the second openings and then flows into the spaces between adjacent membrane bags through the second openings, and then passes through the membrane sheets and flows into the membrane bags; impurities in the water are trapped between the adjacent membrane bags, and the water (i.e. filtered water) flowing into the membrane bags flows out of the first through hole through the first openings. Since the membrane structure comprises a plurality of membrane bags stacked together, each of the membrane bags comprises two stacked membrane sheets, and the surfaces of the two membrane sheets of each of the membrane bags form filtering surfaces, the filtering area of the membrane structure is much larger than the area of the outer circumferential surface of the membrane structure, so that the filtering area, the impurity trapping capacity and the flux of the pre-filter cartridge are greatly increased, the increasing speed of the impurity thickness on the filtering surface is reduced, and the service life of the pre-filter cartridge is prolonged. The flow channels with the first openings are formed in the membrane bags, and the flow channels with the second openings are formed between the adjacent membrane bags, so that the water before filtering and the water after filtering can flow in a certain direction, the water flow is stable and smooth, and the filtering performance of the pre-filter cartridge is ensured.
[0017] Preferably, the pre-filter cartridge comprises a shell composed of the first and second end covers and a shell body connected with the first and second end covers, and the shell body is sleeved outside the water-proof structure.
[0018] Through the arrangement, the membrane structure and the water-proof structure can be protected, and the risk of damage of the membrane structure and the water-proof structure during installation of the pre-filter cartridge can be reduced.
[0019] Preferably, the pre-filter cartridge comprises a shell composed of the first end cover, the second end cover and the water-proof structure.
[0020] Through the arrangement, the membrane structure can be protected, the risk of damage of the membrane structure during installation of the pre-filter cartridge can be reduced, and the structure of the pre-filter cartridge can be simplified to a certain extent.
[0021] Preferably, the water-proof structure is a flexible film wrapped around the membrane structure except the first side and the third side.
[0022] The water-proof structure is arranged as a flexible film wrapped around the membrane structure except the first side and the third side, so that the material cost of the water-proof structure can be reduced, thereby reducing the manufacturing cost of the pre-filter cartridge.
[0023] Preferably, all the membrane sheets in the plurality of membrane bags are folded from one membrane sheet.
[0024] Through the arrangement, the connecting process of the side edges of the membrane sheets can be reduced, and the manufacturing efficiency of the pre-filter cartridge can be improved.
[0025] Preferably, a first water guide structure is arranged between the two membrane sheets of each membrane bag; and / or a second water guide structure is arranged between adjacent membrane bags.
[0026] Through the arrangement, the gap between the membrane sheets is increased, the adhesion between the membrane sheets can be avoided, the resistance of water flow is reduced, the smoothness of water flow is improved, more impurities can be accommodated between the membrane sheets, the flux and the pollution capacity of the pre-filter cartridge are increased, and the service life of the pre-filter cartridge is further prolonged.
[0027] Preferably, the thickness of the water guide structure for guiding raw water in the first water guide structure and the second water guide structure is greater than the thickness of the water guide structure for guiding clean water.
[0028] Through the arrangement, the membrane structure can accommodate more impurities, the flux and the pollution capacity of the pre-filter cartridge are increased, and the service life of the pre-filter cartridge is further prolonged.
[0029] In a second aspect, the utility model also provides a water purification equipment, the water purification equipment includes the pre-filter cartridge of any one of the above technical solutions.
[0030] It should be noted that the water purification equipment has all the technical effects of the pre-filter cartridge of any one of the above technical solutions, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS
[0031] The preferred embodiments of the present application will be described below with reference to the accompanying drawings, in which:
[0032] Figure 1 is a structural schematic diagram of a pre-filter element of an embodiment of the present application;
[0033] Figure 2 is a top view of the pre-filter element of an embodiment of the present application;
[0034] Figure 3 is a sectional view along Figure 2 A-A plane;
[0035] Figure 4 is a structural schematic diagram of a membrane bag in the pre-filter element of an embodiment of the present application Figure 1 ;
[0036] Figure 5 is a structural schematic diagram of a membrane bag in the pre-filter element of the first embodiment of the present application Figure 2 ;
[0037] Figure 6 is a schematic diagram of the state of the plurality of membrane bags in the pre-filter element of an embodiment of the present application before being connected to form a membrane structure.
[0038] LIST OF REFERENCE NUMERALS
[0039] 1, housing; 11, first end cap; 111, first through hole; 112, first flange; 12, second end cap; 121, second through hole; 122, second flange; 13, shell; 2, membrane structure; 21, membrane bag; 211, first membrane sheet; 212, second membrane sheet; 221, first opening; 231, grid. DETAILED DESCRIPTION
[0040] First, those skilled in the art should understand that the embodiments described below are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.
[0041] It should be noted that in the description of the present application, the terms "up", "down", "left", "right", "front", "back", and other terms indicating the direction or positional relationship are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and does not indicate or imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", "fourth" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0042] In addition, it needs to be explained that, in the description of the utility model, unless another explicit provision and limitation, the term "connection" should be understood broadly, for example, can be fixed connection, also can be detachable connection, or integral connection, can be direct connection, also can be indirect connection. For the person skilled in the art, the specific meaning of the above-mentioned term in the utility model can be understood according to the specific circumstances.
[0043] Based on the problems of the prior art PP cotton prefilter mentioned in the background that the filtering area is limited, the pollution capacity and flux are small, and the service life is short, the utility model provides a prefilter, the prefilter includes a membrane structure, a first end cover and a second end cover respectively arranged on the first side and the third side of the membrane structure, and a water isolation structure wrapped on the other side of the membrane structure except the first side and the third side and sealedly connected with the edge of the first end cover and the second end cover, a first through hole and a second through hole are respectively formed on the first end cover and the second end cover; The membrane structure includes a plurality of laminated membrane bags, each membrane bag includes two laminated membrane sheets; In each membrane bag, the first side edges of the two membrane sheets form a first opening at the first side edge of the membrane bag, and the remaining side edges are connected to form the corresponding side edges of the membrane bag; The third side edges of adjacent membrane bags form a second opening, and the remaining side edges are connected; The first side edge and the third side edge of the membrane bag are located at the first side and the third side of the membrane structure, and the four peripheral edges of the first side of the membrane structure are sealedly connected with the inner wall of the first end cover or the water isolation structure, and the four peripheral edges of the third side of the membrane structure are sealedly connected with the inner wall of the second end cover or the water isolation structure; Wherein, the membrane sheet has at least four side edges, and the first side edge and the third side edge of the membrane sheet are not adjacent.
[0044] In use of the pre-filter cartridge, one of the first through hole and the second through hole is used as the water inlet, and the other is used as the water outlet, water flows into the water inlet, and flows out of the water outlet after being filtered by the diaphragm of the membrane structure. When the first through hole and the second through hole are used as the water inlet and the water outlet respectively, water flows from the first through hole to the first opening and flows into the membrane bag through the first opening, and then passes through the diaphragm and flows into the adjacent two membrane bags, and the impurities in the water are intercepted in the membrane bag, and the water (i.e. filtered water) flowing into the adjacent two membrane bags flows to the second opening through the second opening and flows out of the second through hole. When the first through hole and the second through hole are used as the water outlet and the water inlet respectively, water flows into the second through hole and flows to the second opening, and then flows into the adjacent membrane bag through the second opening, and then passes through the diaphragm and flows into the membrane bag, and the impurities in the water are intercepted between the adjacent membrane bags, and the water (i.e. filtered water) flowing into the membrane bag flows to the first through hole through the first opening and flows out of the second through hole. Since the membrane structure includes a plurality of stacked membrane bags, each membrane bag includes two stacked diaphragms, and the surfaces of the two diaphragms of the membrane bag form the filtering surface, so that the filtering area of the membrane structure is much larger than the area of the outer circumferential surface of the membrane structure, thereby greatly increasing the filtering area, the pollution capacity and the flux of the pre-filter cartridge, reducing the increasing speed of the impurity thickness on the filtering surface, thereby prolonging the service life of the pre-filter cartridge. The flow channel with the first opening is formed in the membrane bag, and the flow channel with the second opening is formed between the adjacent membrane bags, so that the water before filtering and the water after filtering can flow along a certain direction, so that the water flow is stable and smooth, and the filtering performance of the pre-filter cartridge is guaranteed.
[0045] The pre-filter cartridge of the utility model will be introduced in detail below with reference to Figures 1 to 6 . Among them, Figure 1 is the structure schematic view of the pre-filter cartridge of an embodiment of the utility model; Figure 2 is the top view of the pre-filter cartridge of an embodiment of the utility model; Figure 3 is the sectional view along Figure 2 A-A surface; Figure 4 is the structure schematic view of the membrane bag in the pre-filter cartridge of an embodiment of the utility model Figure 1 ; Figure 5 is the structure schematic view of the membrane bag in the pre-filter cartridge of the first embodiment of the utility model Figure 2 ; Figure 6 is the state schematic view of the plurality of membrane bags in the pre-filter cartridge of an embodiment of the utility model before being connected to form the membrane structure.
[0046] As Figures 1 to 3As shown, the pre-filter element includes a housing 1 and a membrane structure 2 disposed within the housing 1. The housing 1 includes a first end cap 11, a second end cap 12, and a cylindrical shell 13. A first through hole 111 is formed on the first end cap 11, and a first flange 112 extends to the left from the four edges of the first end cap 11. A second through hole 121 is formed on the second end cap 12, and a second flange 122 extends to the right from the four edges of the first end cap 11. The right end of the cylindrical shell 13 is sealed to the first flange 112 of the first end cap 11, and the left end of the cylindrical shell 13 is sealed to the second flange 122 of the second end cap 12.
[0047] like Figures 4 to 6 As shown, the membrane structure 2 includes multiple stacked membrane bags 21. Each membrane bag 21 includes a first membrane sheet 211 and a second membrane sheet 212 stacked on top of each other. The first membrane sheet 211 and the second membrane sheet 212 are rectangular membrane sheets of the same size. A first opening 221 is formed between the right side of the first membrane sheet 211 and the right side of the second membrane sheet 212 at the right side of the membrane bag 21. The left side of the first membrane sheet 211 is connected to the left side of the second membrane sheet 212 to form the left side of the membrane bag 21. The front side of the first membrane sheet 211 is connected to the front side of the second membrane sheet 212 to form the front side of the membrane bag 21. The rear side of the first membrane sheet 211 is connected to the rear side of the second membrane sheet 212 to form the rear side of the membrane bag 21. A first water guiding structure, which is a grid 231, is provided between the first membrane sheet 211 and the second membrane sheet 212 of each membrane bag 21. The material of grid 231 is PP, PE, PET or modified materials thereof, with a thickness of 5mil to 34mil.
[0048] like Figure 3 and Figure 6As shown, the plurality of film bags 21 are stacked together in the same orientation, the second openings (not shown in the figure) are formed between the left side edges of adjacent film bags 21, the front side edges of adjacent film bags 21 are connected, the rear side edges of adjacent film bags 21 are connected, the right side edges of adjacent film bags 21 are connected, and the second water guide structures are provided between adjacent film bags 21, which are water guide cloths (not shown in the figure), the material of the water guide cloth is PP, PE, PA, PET or modified materials thereof, thereby forming a cuboid-shaped film structure 2, the first openings 221 of all film bags 21 are located on the right side of the film structure 2, and the second openings of all film bags 21 are located on the left side of the film structure 2. The four peripheral edges of the left side of the film structure 2 (i.e. the left side edges of the uppermost first film sheets 211, the left side edges of the lowermost second film sheets 212, the portions of the front side edges of all first film sheets 211 and second film sheets 212 close to the left end, and the portions of the rear side edges of all first film sheets 211 and second film sheets 212 close to the left end) are sealingly bonded to the left end portion of the inner wall of the shell 13, and the four peripheral edges of the right side of the film structure 2 (i.e. the right side edges of the uppermost first film sheets 211, the right side edges of the lowermost second film sheets 212, the portions of the front side edges of all first film sheets 211 and second film sheets 212 close to the right end, and the portions of the rear side edges of all first film sheets 211 and second film sheets 212 close to the right end) are sealingly bonded to the right end portion of the inner wall of the shell 13, and the inner wall of the shell 13 is attached to the front side, the rear side, the upper side and the lower side of the film structure 2, thereby forming a water isolation structure of the film structure 2. The first end cover 11 is located on the right side of the film structure 2, all first openings 221 communicate with the first through holes 111 on the first end cover 11, and all second openings communicate with the second through holes 121 on the second end cover 12. The first through holes 111 are used for connecting the water inlet pipeline, and the second through holes 121 are used for connecting the water outlet pipeline.
[0049] The first film sheet 211 and the second film sheet 212 can be a non-woven fabric made of one or more of PP, PE, polyester, polysulfone, polyether sulfone, polyamide, polyvinylidene fluoride, carbon fiber, the thickness is 0.15mm to 1mm, and the filtration precision is 1nm to 100μm. The first film sheet 211 and the second film sheet 212 can also be microfiltration membranes, ultrafiltration membranes or nanofiltration membranes, etc.
[0050] In use, water supplied by the water inlet pipeline flows through the first through hole 111 to the first opening 221 and into the membrane bag 21, and the water in the membrane bag 21 flows under the drainage effect of the grid 231 and finally passes through the first membrane sheet 211 and the second membrane sheet 212 in the membrane bag 21 to enter between adjacent membrane bags 21, and impurities in the water are trapped on the inner surface of the membrane bag 21, and the water filtered by the first membrane sheet 211 and the second membrane sheet 212 flows between adjacent membrane bags 21 under the guidance of the drainage cloth to the second opening and flows out of the second opening, and the water flowing out of the second opening flows into the water outlet pipeline through the second through hole 121.
[0051] Through the above structure of the pre-filter element, since the membrane structure 2 includes a plurality of stacked membrane bags 21, each membrane bag 21 includes two stacked membrane sheets, and the surfaces of the two membrane sheets of the membrane bag 21 each constitute a filtering surface, so that the filtering area of the membrane structure 2 is much larger than the outer circumferential surface of the membrane structure 2, thereby greatly increasing the filtering area, the impurity carrying capacity and the flux of the pre-filter element, reducing the increase speed of the impurity thickness on the filtering surface, thereby prolonging the service life of the pre-filter element. The flow channel with the first opening 221 is formed in the membrane bag 21, and the flow channel with the second opening is formed between adjacent membrane bags 21, so that the water before filtration and the water after filtration can flow in a certain specific direction, so that the water flow is stable and smooth, and the filtering performance of the pre-filter element is guaranteed.
[0052] The first water guide structure is arranged between the first membrane sheet 211 and the second membrane sheet 212 of each membrane bag 21, and the second water guide structure is arranged between adjacent membrane bags 21, which increases the gap between the membrane sheets and can avoid the adhesion between the membrane sheets to increase the resistance of the water flow, thereby improving the smoothness of the water flow, and the membrane sheets can also accommodate more impurities, thereby increasing the flux and the impurity carrying capacity of the pre-filter element, and further prolonging the service life of the pre-filter element.
[0053] By arranging the shell 1, the shell 1 is composed of the first end cover 11, the second end cover 12 and the shell 13 as the water-proof structure, which can not only play a protective role for the membrane structure 2 and reduce the risk of damage to the membrane structure 2 due to bumps during installation of the pre-filter element, but also can simplify the structure of the pre-filter element to a certain extent.
[0054] It should be noted that the first water guide structure is the grid 231 and the second water guide structure is the water guide cloth, which is only a specific setting mode, and in actual application, it can be adjusted, such as the first water guide structure can also be a water guide cloth or other suitable water guide structure, and the second water guide structure can also be a grid or other suitable water guide structure. In addition, the first water guide structure is arranged between the first membrane sheet 211 and the second membrane sheet 212 of each membrane bag 21, and the second water guide structure is arranged between adjacent membrane bags 21, which is only a more preferred setting mode, and in actual application, it can be adjusted, such as in another feasible embodiment, only one of the first water guide structure and the second water guide structure is arranged, and the above-mentioned first water guide structure and second water guide structure can also not be arranged. In addition, the first through hole 111 is used to connect the water inlet pipeline, and the second through hole 121 is used to connect the water outlet pipeline, which is also a specific setting mode, and in actual application, it can be adjusted, such as the first through hole 111 in the above-mentioned embodiment can be connected to the water outlet pipeline, and the second through hole 121 can be connected to the water inlet pipeline, so that the water provided by the water inlet pipeline first flows to the second opening through the second through hole 121 and flows into the adjacent membrane bags 21 through the second opening. The water entering the adjacent membrane bags 21 flows under the drainage action of the second water guide structure and finally passes through the first membrane sheet 211 and the second membrane sheet 212 in the membrane bag 21 to enter the membrane bag 21, and the impurities in the water are intercepted on the outer surface of the membrane bag 21. The water filtered through the first membrane sheet 211 and the second membrane sheet 212 flows to the first opening 221 under the guidance of the first water guide structure in the membrane bag 21 and flows out of the first opening 221, and the water flowing out of the first opening 221 flows into the water outlet pipeline through the first through hole 111.
[0055] It should be further noted that the four peripheral edges of the left side of the membrane structure 2 are sealingly bonded to the left end portion of the inner wall of the shell 13, and the four peripheral edges of the right side of the membrane structure 2 are sealingly bonded to the right end portion of the inner wall of the shell 13, which is only one specific arrangement, and in actual applications, it can be adjusted, such as in another feasible arrangement, the four peripheral edges of the left side of the membrane structure 2 are sealingly bonded to the four peripheral edges of the second end cover 12, and the four peripheral edges of the right side of the membrane structure 2 are sealingly bonded to the four peripheral edges of the first end cover 11. In addition, the first membrane 211 and the second membrane 212 are rectangular membranes of the same size, which is only a more preferred arrangement, and in actual applications, it can be adjusted, such as the first membrane 211 and the second membrane 212 are trapezoidal membranes or other quadrilateral membranes of the same size, and they can also be polygonal membranes with more than four sides. When the first membrane 211 and the second membrane 212 are polygonal membranes with more than four sides of the same size, the shape of the shell 13 is adaptively adjusted to cover the sides of the membrane structure other than the first side and the third side, and the first end cover and the second end cover are arranged on the first side and the third side of the membrane structure, respectively. In each membrane bag, the first side edges of the two membranes form a first opening at the first side edge of the membrane bag, and the remaining side edges are connected to form the corresponding side edges of the membrane bag, respectively. The third side edges of adjacent membrane bags form a second opening, and the remaining side edges are connected, respectively. The first side edge and the third side edge of the membrane bag are located on the first side and the third side of the membrane structure, respectively. The four peripheral edges of the first side of the membrane structure are sealingly connected to the inner wall of the shell, and the four peripheral edges of the third side of the membrane structure are sealingly connected to the inner wall of the shell.
[0056] In another feasible embodiment, on the basis of the above-mentioned embodiment, the shell 13 is no longer used as a water barrier structure, and a flexible film is wound on the front side, the rear side, the upper side and the lower side of the membrane structure 2. The flexible film serves as a water barrier structure, and the portions of the flexible film located at the right end and the left end of the membrane structure 2 are sealingly connected to the edges of the first end cover 11 and the second end cover 12, respectively.
[0057] In another feasible embodiment, unlike the above-mentioned embodiment, the shell 13 is not included, and the first end cover 11 and the second end cover 12 are not part of the outer shell. A flexible film is wound on the front side, the rear side, the upper side and the lower side of the membrane structure 2. The flexible film serves as a water barrier structure, and the portions of the flexible film located at the right end and the left end of the membrane structure 2 are sealingly connected to the edges of the first end cover 11 and the second end cover 12, respectively. The pre-filter cartridge further includes an outer shell, and the first end cover 11, the second end cover 12, the water barrier structure and the membrane structure 2 are located in the outer shell. The outer shell is provided with a water inlet and a water outlet, and the first through hole 111 on the first end cover 11 and the second through hole 121 on the second end cover 12 are in communication with the water inlet and the water outlet of the outer shell, respectively.
[0058] In another possible embodiment, different from the above-mentioned embodiments, the shell 13 is not included, the first end cover 11 and the second end cover 12 are not part of the outer shell, the flexible film is wound on the front side, the back side, the upper side and the lower side of the membrane structure 2 as a water-proof structure, and the part of the flexible film at the right end and the left end of the membrane structure 2 is respectively sealed and connected with the edge of the first end cover 11 and the second end cover 12. That is, the front filter element does not include an outer shell.
[0059] Preferably, the first membrane sheet 211 and the second membrane sheet 212 in the plurality of membrane bags 21 in each of the above-mentioned embodiments are formed by folding one membrane sheet, so that the connecting process of the side edges of the membrane sheet is reduced, and the manufacturing efficiency of the front filter element is improved.
[0060] Preferably, the thickness of the water guide structure for guiding raw water (i.e. water before filtration) in the first water guide structure and the second water guide structure is greater than the thickness of the water guide structure for guiding clean water. Through such arrangement, the membrane structure 2 can accommodate more impurities, thereby increasing the flux and the pollution capacity of the front filter element, and further prolonging the service life of the front filter element.
[0061] In addition, the utility model also provides a kind of water purification equipment, and the water purification equipment includes the front filter element of any one of the above-mentioned embodiments.
[0062] It should be noted that the water purification equipment has all the technical effects of the front filter element described in any one of the above-mentioned embodiments, which will not be repeated here. In addition, the water purification equipment can be a water purifier or a water and heat integrated machine.
[0063] So far, the technical scheme of the utility model has been described in combination with the preferred embodiments shown in the drawings, but those skilled in the art can easily understand that the protection scope of the utility model is obviously not limited to these specific embodiments. Without deviating from the principles of the utility model, those skilled in the art can make equivalent changes or replacements to related technical features, and the technical scheme after these changes or replacements will fall within the protection scope of the utility model.
Claims
1. A pre-filter cartridge, characterized by, The front filter element comprises a membrane structure (2), a first end cover (11) and a second end cover (12) respectively arranged at a first side and a third side of the membrane structure (2), and a waterproof structure wrapped around the other sides of the membrane structure (2) except the first side and the third side and sealingly connected with the edges of the first end cover (11) and the second end cover (12), and a first through hole (111) and a second through hole (121) are respectively formed in the first end cover (11) and the second end cover (12); The membrane structure (2) comprises a plurality of membrane bags (21) stacked together, and each membrane bag (21) comprises two stacked membrane sheets (211, 212). In each membrane bag (21), a first opening (221) is formed between the first side edges of the two membrane sheets (211, 212) at the first side edge of the membrane bag (21), and the remaining side edges are connected to form the corresponding side edges of the membrane bag (21); A second opening is formed between the third side edges of adjacent membrane bags (21), and the remaining side edges are connected respectively; The first side edge and the third side edge of the membrane bag (21) are located at the first side and the third side of the membrane structure (2), respectively, and the peripheral edge of the first side of the membrane structure (2) is sealingly connected with the inner wall of the first end cover (11) or the waterproof structure, and the peripheral edge of the third side of the membrane structure (2) is sealingly connected with the inner wall of the second end cover (12) or the waterproof structure; The membrane sheet (211, 212) has at least four side edges, and the first side edge and the third side edge of the membrane sheet (211, 212) are not adjacent.
2. The prefilter cartridge of claim 1, wherein, The front filter element comprises an outer shell (1) composed of the first end cover (11), the second end cover (12), and a shell body (13) connected with the first end cover (11) and the second end cover (12), and the shell body (13) is sleeved outside the waterproof structure.
3. The pre-filter cartridge of claim 1, wherein, The front filter element comprises an outer shell (1) composed of the first end cover (11), the second end cover (12), and the waterproof structure.
4. The prefilter cartridge of claim 1 or 2, wherein, The waterproof structure is a flexible film wrapped around the other sides of the membrane structure (2) except the first side and the third side.
5. The prefilter cartridge of any one of claims 1-3, wherein, All the membrane sheets (211, 212) in the plurality of membrane bags (21) are formed by folding one membrane sheet (211, 212).
6. The prefilter cartridge of any one of claims 1-3, wherein, A first water guide structure is arranged between the two membrane sheets (211, 212) of each membrane bag (21); and / or a second water guide structure is arranged between adjacent membrane bags (21).
7. The prefilter cartridge of claim 6, wherein, The first water guide structure is a water guide cloth or a grid; And / or the second water guide structure is a water guide cloth or a grid; And / or the thickness of the water guide structure for guiding raw water in the first water guide structure and the second water guide structure is greater than the thickness of the water guide structure for guiding clean water.
8. The prefilter cartridge of any one of claims 1-3, wherein, The material of the membrane sheet (211, 212) is non-woven fabric, microfiltration membrane, ultrafiltration membrane, or nanofiltration membrane.
9. The pre-filter cartridge of any one of claims 1-3, wherein, The shape of the membrane sheet (211, 212) is rectangular, trapezoidal, or other quadrilateral.
10. A water purification apparatus characterized by comprising: The water purification device comprises the pre-filter cartridge according to any one of claims 1 to 9. The water purification device comprises the pre-filter cartridge according to any one of claims 1 to 9.