Front filter element and water purification equipment with front filter element
By designing a pre-filter cartridge with a large-area membrane bag structure and a water-guiding structure, the problems of small filtration area, insufficient dirt holding capacity and flow rate of PP cotton filter cartridges have been solved, achieving more efficient filtration and a longer service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-26
- Publication Date
- 2026-03-31
AI Technical Summary
Existing PP cotton pre-filters have limited filtration area, small dirt holding capacity and throughput, and short lifespan.
Design a pre-filter cartridge including a central rod, a coaxial membrane structure and end caps. The membrane structure consists of multiple stacked membrane bags, each membrane bag consisting of two stacked rectangular membrane sheets. The membrane bags are wound around the central rod to form a large-area filtration structure. A water guiding structure is provided to improve water flow smoothness.
It significantly increases the filtration area, dirt holding capacity, and flow rate, extends the service life of the filter element, and improves the smoothness of water flow.
Smart Images
Figure CN224057109U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to filter core technical field, 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 improving, 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, a front filter core is usually arranged on the upstream pipeline of the reverse osmosis filter core, and tap water is filtered by the front filter core first and then by 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 center rod, a membrane structure formed on the outer circumferential surface of the center rod and coaxial with the center rod, and a first end cover and a second end cover arranged at both ends of the membrane structure, wherein a first water passage hole is formed on the first end cover; the membrane structure comprises a plurality of membrane bags arranged in layers; each membrane bag comprises two rectangular membrane sheets arranged in layers, the first side edge, the second side edge and the third side edge of the two rectangular membrane sheets in each membrane bag are connected to form the first side edge, the second side edge and the third side edge of the membrane bag, respectively, and the first opening at the fourth side edge of the membrane bag is formed between the fourth side edges of the two rectangular membrane sheets in each membrane bag; the second side edge, the third side edge and the fourth side edge of adjacent two membrane bags are connected, respectively, and the second opening is formed between the first side edges of the adjacent two membrane bags, and the first side edge and the fourth side edge of the membrane bag are adjacent; one side edge of the plurality of membrane bags is connected to the surface of the center rod and parallel to the center rod, and the plurality of membrane bags are wound on the center rod to form the membrane structure; the first opening and the second opening are used as one and the other of the water inlet and the water outlet, respectively, and the first opening or the second opening is in communication with the first water passage hole.
[0007] In the preferred technical scheme of the pre-filter cartridge, the second side edge or the third side edge of the plurality of membrane bags is connected to the surface of the center rod.
[0008] In the preferred technical scheme of the pre-filter cartridge, the second side edge of the plurality of membrane bags is connected to the surface of the center rod, the second opening is located at one end of the membrane structure, the second opening is in communication with the first water passage hole, and the second opening serves as the water inlet.
[0009] In the preferred technical scheme of the pre-filter cartridge, the first side edge of the plurality of membrane bags is connected to the surface of the center rod, the center rod is a center pipe, a water collecting hole is formed on the center pipe, the second opening is in communication with the water collecting hole, the second opening serves as the water outlet, and the first opening is in communication with the first water passage hole; or the fourth side edge of the plurality of membrane bags is connected to the surface of the center rod, the center rod is a center pipe, a water collecting hole is formed on the center pipe, the first opening is in communication with the water collecting hole, the first opening serves as the water outlet, and the second opening is in communication with the first water passage hole.
[0010] In the preferred technical scheme of the pre-filter cartridge, the first end of the center pipe is blocked, and the second end of the center pipe is open; the second end of the center pipe penetrates through the first end cover or the second end cover, or the second end of the center pipe is in communication with the second water passage hole on the first end cover or the second end cover.
[0011] In the preferred technical scheme of the pre-filter cartridge, all the rectangular membrane sheets in the plurality of membrane bags are formed by folding one membrane sheet.
[0012] In the preferred technical scheme of the pre-filter cartridge, a first water guide structure is arranged between the two rectangular membrane sheets of each membrane bag; and / or a second water guide structure is arranged between adjacent membrane bags.
[0013] In the preferred technical scheme of the pre-filter cartridge, 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.
[0014] In the preferred technical scheme of the pre-filter cartridge, the material of the rectangular membrane sheet is non-woven fabric, microfiltration membrane, ultrafiltration membrane, or nanofiltration membrane.
[0015] In the technical scheme, the pre-filter cartridge comprises a center rod, a membrane structure formed on the outer circumferential surface of the center rod and coaxial with the center rod, and a first end cover and a second end cover arranged at two ends of the membrane structure, and a first water passage hole is formed on the first end cover; the membrane structure comprises a plurality of membrane bags arranged in layers; each membrane bag comprises two rectangular membrane sheets arranged in layers; the first side edge, the second side edge and the third side edge of the two rectangular membrane sheets in each membrane bag are connected to form the first side edge, the second side edge and the third side edge of the membrane bag respectively; the fourth side edges of the two rectangular membrane sheets in each membrane bag are connected to form a first opening at the fourth side edge of the membrane bag; the second side edges, the third side edges and the fourth side edges of two adjacent membrane bags are connected respectively, and the first side edges of the two adjacent membrane bags are connected to form a second opening, and the first side edge and the fourth side edge of the membrane bag are adjacent; one side edge of the plurality of membrane bags is connected to the surface of the center rod and is parallel to the center rod, and the plurality of membrane bags are wound on the center rod to form the membrane structure; the first opening and the second opening are used as one and the other of the water inlet and the water outlet respectively, and the first opening or the second opening is communicated with the first water passage hole.
[0016] In use of the pre-filter cartridge, one of the first opening and the second opening is used as the water inlet, and the other is used as the 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 opening and the second opening are used as the water inlet and the water outlet respectively, water flows into the membrane bag from the first opening, then passes through the membrane sheets and flows into the space between the two adjacent membrane bags, and the impurities in the water are intercepted in the membrane bag, and the water (i.e. filtered water) flowing into the space between the two adjacent membrane bags flows out of the second opening. When the first opening and the second opening are used as the water outlet and the water inlet respectively, water flows into the adjacent membrane bag from the second opening, then passes through the membrane sheets and flows into the membrane bag, and the impurities in the water are intercepted between the two adjacent membrane bags, and the water (i.e. filtered water) flowing into the membrane bag flows out of the first opening. Since the membrane structure comprises a plurality of membrane bags arranged in layers, each membrane bag comprises two rectangular membrane sheets arranged in layers, the surfaces of the two rectangular membrane sheets of the membrane bag form the filtering surfaces, and the plurality of membrane bags are arranged in layers and wound on the center rod to form the membrane structure, the filtering area of the membrane structure is much larger than the outer circumferential surface of the membrane structure, so that the filtering area, the impurity carrying 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.
[0017] Preferably, the second side edges or the third side edges of the plurality of membrane bags are connected to the surface of the center rod.
[0018] Through the arrangement, one of the first opening and the second opening is distributed on one end surface of the membrane structure, and the other of the first opening and the second opening is distributed on the outer circumferential surface of the membrane structure, compared with the arrangement that the first opening or the second opening is arranged on the outer circumferential surface of the center rod, the opening degree of the first opening and the second opening can be ensured, the resistance of water flow is reduced, the smoothness of water flow is improved, and the pre-filter cartridge can maintain a large flux.
[0019] Preferably, all the rectangular membrane sheets in the plurality of membrane bags are formed by folding one membrane sheet.
[0020] By such an arrangement, the connecting process of the side edges of the rectangular membrane sheets can be reduced, and the manufacturing efficiency of the pre-filter cartridge can be improved.
[0021] Preferably, a first water guide structure is arranged between the two rectangular membrane sheets of each membrane bag; and / or a second water guide structure is arranged between adjacent membrane bags.
[0022] By such an arrangement, the gap between the rectangular membrane sheets is increased, the rectangular membrane sheets can be prevented from being attached to each other to increase the resistance of water flow, the smoothness of water flow is improved, and more impurities can be accommodated between the rectangular membrane sheets, so that the flux and the impurity capacity of the pre-filter cartridge are increased, and the service life of the pre-filter cartridge is further prolonged.
[0023] 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.
[0024] 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
[0025] The preferred embodiments of the utility model will be described below with reference to the accompanying drawings, in which:
[0026] Figure 1 is the structural schematic view of the pre-filter cartridge of the first embodiment of the utility model;
[0027] Figure 2 is the exploded view of the pre-filter cartridge of the first embodiment of the utility model;
[0028] Figure 3 is the perspective view of the semi-finished product of the membrane structure of the pre-filter cartridge of the first embodiment of the utility model;
[0029] Figure 4 is the sectional view of the pre-filter cartridge of the first embodiment of the utility model in the plane passing through the center axis;
[0030] Figure 5 is the sectional view of the pre-filter cartridge of the second embodiment of the utility model in the plane passing through the center axis.
[0031] LIST OF REFERENCE NUMERALS:
[0032] 1, center rod; 1', center tube; 11', water collecting hole; 2, membrane structure; 21, membrane bag; 211, first rectangular membrane sheet; 212, second rectangular membrane sheet; 22, first opening; 23, second opening; 24, water guide cloth; 25, grid; 3, first end cover; 31, first water through hole; 4, second end cover; 41, second water through hole. DETAILED DESCRIPTION
[0033] Firstly, those skilled in the art should understand that the embodiments described below are only used to explain the technical principles of the utility model, and are not intended to limit the protection scope of the utility model.
[0034] It should be noted that in the description of the utility model, the terms indicating the direction or positional relationship of "upper", "lower" and the like are based on the direction or positional relationship shown in the drawings, which is only for the convenience of description, and is not intended to indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third", "fourth" are only for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0035] In addition, it should also be noted that in the description of the utility model, unless otherwise explicitly specified and limited, the term "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection, it can be direct connection, or indirect connection. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0036] Based on the problems of the existing PP cotton pre-filter element mentioned in the background art, such as limited filtering area, small pollution carrying capacity and flux, and short service life, the utility model provides a pre-filter element, which comprises a center rod, a membrane structure formed on the outer circumferential surface of the center rod and coaxial with the center rod, and a first end cover and a second end cover arranged at both ends of the membrane structure, and a first water through hole is formed on the first end cover; the membrane structure comprises a plurality of membrane bags arranged in layers; each membrane bag comprises two rectangular membrane sheets arranged in layers, and the first side edge, the second side edge and the third side edge of the two rectangular membrane sheets in each membrane bag are connected to form the first side edge, the second side edge and the third side edge of the membrane bag, respectively, and the fourth side edges of the two rectangular membrane sheets in each membrane bag form a first opening at the fourth side edge of the membrane bag; the second side edge, the third side edge and the fourth side edge of adjacent two membrane bags are connected, respectively, and the first side edges of the adjacent two membrane bags form a second opening, and the first side edge and the fourth side edge of the membrane bag are adjacent; one side edge of the plurality of membrane bags is connected to the surface of the center rod and parallel to the center rod, and the plurality of membrane bags are wound on the center rod to form the membrane structure; the first opening and the second opening are used as one and the other of the water inlet and the water outlet, respectively, and the first opening or the second opening is in communication with the first water through hole.
[0037] In use of the pre-filter cartridge of the utility model, one of the first opening and the second opening is used as a water inlet, and the other is used as a water outlet. Water flows into the water inlet, and then flows out of the water outlet after being filtered by the diaphragm of the membrane structure. When the first opening and the second opening are used as the water inlet and the water outlet respectively, water flows into the membrane bag from the first opening, and then flows into the space between the adjacent two membrane bags through the diaphragm. The impurities in the water are intercepted in the membrane bag. The water (i.e. filtered water) flowing into the space between the adjacent two membrane bags flows out of the second opening. When the first opening and the second opening are used as the water outlet and the water inlet respectively, water flows into the adjacent membrane bag from the second opening, and then flows into the membrane bag through the diaphragm. The impurities in the water are intercepted between the adjacent membrane bags. The water (i.e. filtered water) flowing into the membrane bag flows out of the first opening. Since the membrane structure comprises a plurality of stacked membrane bags, each of which comprises two stacked rectangular diaphragms, the surfaces of the two rectangular diaphragms of the membrane bag each constitute a filtering surface. The plurality of membrane bags are stacked and wound on the central rod to form the membrane structure, so that the filtering area of the membrane structure is much larger than the outer circumferential surface of the membrane structure, thereby greatly increasing the filtering area, the impurity carrying capacity and the flux of the pre-filter cartridge, reducing the increasing speed of the impurity thickness on the filtering surface, and prolonging the service life of the pre-filter cartridge.
[0038] The pre-filter cartridge of the utility model will be described in detail below with reference to Figures 1 to 5 . Among them, Figure 1 is a structural schematic view of the pre-filter cartridge of the first embodiment of the utility model;
[0039] Figure 2 is an exploded view of the pre-filter cartridge of the first embodiment of the utility model; Figure 3 is a perspective view of a semi-finished product of the membrane structure in the pre-filter cartridge of the first embodiment of the utility model; Figure 4 is a sectional view of the pre-filter cartridge of the first embodiment of the utility model in the plane passing through the central axis; Figure 5 is a sectional view of the pre-filter cartridge of the second embodiment of the utility model in the plane passing through the central axis.
[0040] In the first embodiment of the utility model, as Figures 1 to 4 indicated and with reference to Figure 1 indicated, the pre-filter cartridge comprises a hollow central rod 1, a membrane structure 2 formed on the outer circumferential surface of the central rod 1, and a first end cover 3 and a second end cover 4 respectively arranged at the upper end and the lower end of the membrane structure 2. The membrane structure 2 is coaxial with the central rod 1, and the first end cover 3 is formed with a first water through hole 31.
[0041] As Figure 3 indicated and with reference to Figure 3The film structure 2 comprises a plurality of film bags 21 arranged in a stack. Each film bag 21 comprises two rectangular film pieces arranged in a stack. The first side edge, the second side edge and the third side edge of the two rectangular film pieces in each film bag 21 are connected to form the first side edge, the second side edge and the third side edge of the film bag 21 respectively. The fourth side edges of the two rectangular film pieces in each film bag 21 are connected to form a first opening 22 at the fourth side edge of the film bag 21. The second side edges, the third side edges and the fourth side edges of adjacent two film bags 21 are connected respectively. The first side edges of adjacent two film bags 21 are connected to form a second opening 23. The first side edge and the fourth side edge of the film bag 21 are adjacent. Specifically, each film bag 21 comprises a first rectangular film piece 211 and a second rectangular film piece 212 arranged in a stack. The back side edge of the first rectangular film piece 211 and the back side edge of the second rectangular film piece 212 are connected to form the back side edge of the film bag 21. The right side edge of the first rectangular film piece 211 and the right side edge of the second rectangular film piece 212 are connected to form the right side edge of the film bag 21. The front side edge of the first rectangular film piece 211 and the front side edge of the second rectangular film piece 212 are connected to form the front side edge of the film bag 21. The left side edge of the first rectangular film piece 211 and the left side edge of the second rectangular film piece 212 are connected to form a first opening 22 at the left side edge of the film bag 21. The right side edges of adjacent two film bags 21 are connected to each other. The front side edges of adjacent two film bags 21 are connected to each other. The left side edges of adjacent two film bags 21 are connected to each other. The back side edges of adjacent two film bags 21 are connected to form a second opening 23. Preferably, the first rectangular film piece 211 and the second rectangular film piece 212 in the plurality of film bags 21 are folded from one film piece. Therefore, the right side edge of the first rectangular film piece 211 and the right side edge of the second rectangular film piece 212 in each film bag 21 are connected after folding the film piece. The left side edge of the second rectangular film piece 212 in each film bag 21 and the left side edge of the first rectangular film piece 211 in the adjacent film bag 21 are connected after folding the film piece. Only the front side edge of the first rectangular film piece 211 and the front side edge of the second rectangular film piece 212, the back side edge of the first rectangular film piece 211 and the back side edge of the second rectangular film piece 212, the right side edge of the second rectangular film piece 212 in each film bag 21 and the right side edge of the first rectangular film piece 211 in the adjacent film bag 21, and the front side edge of the second rectangular film piece 212 in each film bag 21 and the front side edge of the first rectangular film piece 211 in the adjacent film bag 21 need to be connected, for example, by using glue. The first rectangular film piece 211 and the second rectangular film piece 212 can be non-woven fabric made of one or more of PP, PE, polyester, polysulfone, polyethersulfone, polyamide, polyvinylidene fluoride, with a thickness of 0.15mm to 1mm and a filtration accuracy of 1nm to 100um. The first rectangular film piece 211 and the second rectangular film piece 212 can also be microfiltration membrane, ultrafiltration membrane or nanofiltration membrane, etc.
[0042] Preferably, a first water guide structure is arranged between the first rectangular membrane sheet 211 and the second rectangular membrane sheet 212 of each membrane bag 21, and a second water guide structure is arranged between adjacent membrane bags 21, the first water guide structure being the water guide cloth 24, and the second water guide structure being the grid 25. The material of the water guide cloth 24 is PP, PE, PA or polyester, and the thickness is 0.1mm to 1mm. The material of the grid 25 is PP, PE or PET, and the thickness is 5mil to 34mil.
[0043] The right side edges of the plurality of membrane bags 21 are connected to the surface of the central rod 1 and are parallel to the central rod 1, the plurality of membrane bags 21 are wound on the central rod 1 to form a cylindrical membrane structure 2, the first opening 22 is located at the outer peripheral surface of the membrane structure 2, and the second opening 23 is located at one end surface of the membrane structure 2.
[0044] As shown in the orientation shown in Figure 4 and shown in Figure 4 , the second opening 23 is located at the upper end surface of the membrane structure 2, the second opening 23 serves as a water inlet, and the first opening 22 serves as a water outlet. The first end cover 3 is installed at the upper end of the membrane structure 2, the second end cover 4 is installed at the lower end of the membrane structure 2, and the second opening 23 communicates with the first water through hole 31 on the first end cover 3. In the use state, the first water through hole 31 of the pre-filter is connected to the water inlet pipeline, and the water flows in the direction indicated by the arrow in Figure 4 , the water entering from the first water through hole 31 flows into the space between the membrane bags 21 and passes through the first rectangular membrane sheet 211 and the second rectangular membrane sheet 212 in the membrane bags 21, the impurities in the water are intercepted on the outer surface of the membrane bag 21, and the water filtered by the first rectangular membrane sheet 211 and the second rectangular membrane sheet 212 flows in the membrane bag 21 and flows out from the first opening 22. Since the second side edge, the third side edge and the fourth side edge of the two adjacent membrane bags 21 are connected respectively, the third side edges of all the membrane bags 21 are wound together to form the lower end of the membrane structure 2, and the second end cover 4 is installed at the lower end of the membrane structure 2 to seal the lower end of the membrane structure 2, so that after flowing into the space between the membrane bags 23 from the second opening 23, the water can only pass through the first rectangular membrane sheet 211 and the second rectangular membrane sheet 212 to be filtered into pure water.
[0045] Through the structure of the pre-filter described above, since the membrane structure 2 includes a plurality of membrane bags 21 stacked, each membrane bag 21 includes two stacked rectangular membrane sheets, the surfaces of the two rectangular membrane sheets of the membrane bag 21 constitute the filtering surface, and the plurality of membrane bags 21 are stacked and wound on the central rod 1 to form the membrane structure 2, so that the filtering area of the membrane structure 2 is much larger than the outer peripheral surface of the membrane structure 2, thereby greatly increasing the filtering area, the pollution capacity and the flux of the pre-filter, reducing the increasing speed of the impurity thickness on the filtering surface, and prolonging the service life of the pre-filter.
[0046] The first rectangular membrane sheet 211 and the second rectangular membrane sheet 212 in the plurality of membrane bags 21 are formed by folding one membrane sheet, so that the connecting process of the side edges of the rectangular membrane sheet is reduced, and the manufacturing efficiency of the pre-filter is improved.
[0047] The first water guide structure is arranged between the first rectangular membrane sheet 211 and the second rectangular membrane sheet 212 of each membrane bag 21, and the second water guide structure is arranged between adjacent membrane bags 21, so that the gap between the rectangular membrane sheets is increased, the rectangular membrane sheets are prevented from being attached to each other to increase the resistance of water flow, the smoothness of water flow is improved, more impurities can be accommodated between the rectangular membrane sheets, the flux and the pollution capacity of the pre-filter are increased, and the service life of the pre-filter is further prolonged.
[0048] The center rod 1 is hollow, so that the weight of the center rod 1 is reduced, and the weight of the pre-filter is reduced.
[0049] It should be noted that the first water guide structure is a water guide cloth 24, and the second water guide structure is a grid 25, which is only one specific setting mode, and in actual application, it can be adjusted, for example, the first water guide structure can also be a grid or other suitable water guide structure, and the second water guide structure can also be a water guide cloth or other suitable water guide structure. In addition, the first water guide structure is arranged between the first rectangular membrane sheet 211 and the second rectangular 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, for example, in another feasible embodiment, only one of the first water guide structure and the second water guide structure is arranged, and the first water guide structure and the second water guide structure described above can also not be arranged. In addition, the first rectangular membrane sheet 211 and the second rectangular membrane sheet 212 in the plurality of membrane bags 21 are formed by folding one membrane sheet, which is also a more preferred setting mode, and in actual application, it can be adjusted, for example, in another feasible embodiment, the first rectangular membrane sheet 211 and the second rectangular membrane sheet 212 are respectively cut into shape and then stacked and connected to the corresponding side edges.
[0050] It should be noted that the second opening 23 is used as the water inlet and the first opening 22 is used as the water outlet, which is a specific arrangement, and in actual application, the first opening 22 in the first embodiment can be used as the water inlet and the second opening 23 can be used as the water outlet. In addition, the center rod 1 is hollow, which is a preferred arrangement, and in actual application, the center rod 1 can be arranged as a solid rod. Furthermore, the right side edges of the plurality of membrane bags 21 in the first embodiment are connected to the surface of the center rod 1 and are parallel to the center rod 1, and the plurality of membrane bags 21 are wound on the center rod 1 to form a cylindrical membrane structure 2, which is a specific arrangement, and in actual application, the front side edges of the plurality of membrane bags 21 in the first embodiment can be connected to the surface of the center rod 1 and are parallel to the center rod 1, and the plurality of membrane bags 21 are wound on the center rod 1 to form a cylindrical membrane structure 2.
[0051] In the second embodiment of the utility model, as shown in Figure 5 and referring to Figure 5 , the center rod 1 is replaced by a center pipe 1' with a closed upper end and an open lower end, a plurality of water collecting holes 11' penetrating the pipe wall of the center pipe 1' are arranged on the pipe wall of the center pipe 1' in the axial direction, a second water passage 41 is formed on the second end cover 4, the lower end of the center pipe 1' communicates with the second water passage 41, Figure 4 the left side edges of the plurality of membrane bags 21 are connected to the surface of the center pipe 1' and are parallel to the center pipe 1', the plurality of membrane bags 21 are wound on the center pipe 1' to form a cylindrical membrane structure 2, the first opening 22 communicates with the water collecting holes 11' on the center pipe 1', and the second opening 23 is located at the upper end face of the membrane structure 2.
[0052] In the use state, the first water passage 31 of the front filter element is connected to the water inlet pipeline, water flows in the direction indicated by the arrow in Figure 5 , the water entering from the first water passage 31 flows into the membrane bags 21 from the second opening 23 and passes through the first rectangular membrane 211 and the second rectangular membrane 212 in the membrane bags 21, the impurities in the water are retained on the outer surface of the membrane bags 21, most of the water filtered by the first rectangular membrane 211 and the second rectangular membrane 212 flows out from the first opening 22 in the membrane bags 21, a small part of the water filtered by the first rectangular membrane 211 and the second rectangular membrane 212 directly passes through the first rectangular membrane 211 and the second rectangular membrane 212 and flows out along the radial direction of the membrane structure 2, and the filtered water is finally collected in the center pipe 1' through the water collecting holes 11' and flows out from the lower end of the center pipe 1'.
[0053] It should be noted that the first opening 22 in the second embodiment can be used as the water inlet and the second opening 23 can be used as the water outlet, and the water flow will be in the direction indicated by the arrow in Figure 5In addition, the second water through hole 41 is formed on the second end cover 4, and the lower end of the center pipe 1' communicates with the second water through hole 41. This is only a specific arrangement, and in actual application, it can be adjusted, for example, the second end cover 4 is not provided with the second water through hole 41, and the lower end of the center pipe 1' directly penetrates out of the second end cover 4. In addition, the upper end of the center pipe 1' is blocked, and the lower end is open. The lower end of the center pipe 1' communicates with the second water through hole 41 on the second end cover 4. This is also a specific arrangement, and in actual application, it can be adjusted, for example, in another feasible embodiment, the lower end of the center pipe 1' is blocked, and the upper end is open. The upper end of the center pipe 1' penetrates out of the first end cover 3 or is provided with a second water through hole on the first end cover 3. The upper end of the center pipe 1' communicates with the second water through hole on the first end cover 3.
[0054] In addition, the utility model also provides a kind of water purification equipment, and the water inlet equipment includes the front filter element of any embodiment described above.
[0055] It needs to be explained that the water purification equipment has the technical effect of the front filter element described in any embodiment described above, and will not be repeated here. In addition, the water purification equipment can be a water purifier, or a water and heat integrated machine.
[0056] 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 center rod (1), a membrane structure (2) formed on the outer circumferential surface of the center rod (1) and coaxial with the center rod (1), and a first end cover (3) and a second end cover (4) arranged at both ends of the membrane structure (2), wherein a first water passage hole (31) is formed on the first end cover (3); The membrane structure (2) comprises a plurality of stacked membrane bags (21); each membrane bag (21) comprises two stacked rectangular membrane sheets (211, 212), and the first side edge, the second side edge and the third side edge of the two rectangular membrane sheets (211, 212) in each membrane bag (21) are connected to form the first side edge, the second side edge and the third side edge of the membrane bag (21), respectively, and the fourth side edges of the two rectangular membrane sheets (211, 212) in each membrane bag (21) are connected to form a first opening (22) at the fourth side edge of the membrane bag (21); The second side edge, the third side edge and the fourth side edge of adjacent two membrane bags (21) are connected, respectively, and the first side edges of adjacent two membrane bags (21) are connected to form a second opening (23), and the first side edge and the fourth side edge of the membrane bag (21) are adjacent; One side edge of the plurality of membrane bags (21) is connected to the surface of the center rod (1) and parallel to the center rod (1), and the plurality of membrane bags (21) are wound on the center rod (1) to form the membrane structure (2); The first opening (22) and the second opening (23) are used as one and the other of the water inlet and the water outlet, respectively, and the first opening (22) or the second opening (23) communicates with the first water passage hole (31).
2. The prefilter cartridge of claim 1, wherein, The second side edge or the third side edge of the plurality of membrane bags (21) is connected to the surface of the center rod (1).
3. The prefilter cartridge of claim 2, wherein, The second side edge of the plurality of membrane bags (21) is connected to the surface of the center rod (1), the second opening (23) is located at one end of the membrane structure (2), the second opening (23) communicates with the first water passage hole (31), and the second opening (23) is used as the water inlet.
4. The pre-filter cartridge of claim 1, wherein, The first side edge of the plurality of membrane bags (21) is connected to the surface of the center rod (1), the center rod (1) is a center pipe (1'), a water collecting hole (11') is formed on the center pipe (1'), the second opening (23) communicates with the water collecting hole (11'), the second opening (23) is used as the water outlet, and the first opening (22) communicates with the first water passage hole (31); or The fourth side edge of the plurality of membrane bags (21) is connected to the surface of the center rod (1), the center rod (1) is a center pipe (1'), a water collecting hole (11') is formed on the center pipe (1'), the first opening (22) communicates with the water collecting hole (11'), the first opening (22) is used as the water outlet, and the second opening (23) communicates with the first water passage hole (31).
5. The prefilter cartridge of claim 4, wherein, The first end of the center pipe (1') is blocked, and the second end of the center pipe (1') is open. The second end of the central pipe (1') penetrates out of the first end cover (3) or the second end cover (4), or the second end of the central pipe (1') communicates with a second water through hole (41) on the first end cover (3) or the second end cover (4).
6. The prefilter cartridge of any one of claims 1-5, wherein, All the rectangular membrane pieces (211, 212) in the plurality of membrane bags (21) are formed by folding a membrane piece.
7. The prefilter cartridge of any one of claims 1-5, wherein, First water guide structures are arranged between the two rectangular membrane pieces (211, 212) of each membrane bag (21); and / or second water guide structures are arranged between adjacent membrane bags (21).
8. The prefilter cartridge of claim 7, wherein, The first water guide structures are water guide cloths or meshes; and / or the second water guide structures are water guide cloths or meshes.
9. The prefilter cartridge of any one of claims 1-5, wherein, The material of the rectangular membrane pieces (211, 212) is non-woven fabric, microfiltration membrane, ultrafiltration membrane or nanofiltration membrane.
10. A water purification apparatus characterized by comprising: The water purification equipment comprises the front filter element according to any one of claims 1 to 9.