CN218871795U - Reverse osmosis filter core and purifier - Google Patents

Abstract

The utility model belongs to the technical field of water purification equipment, and discloses a reverse osmosis filter element and a water purification device, wherein the reverse osmosis filter element comprises a central tube and a plurality of filter membrane components, a plurality of water through holes are arranged on the central tube, and two ends of the central tube are provided with concentrated water outlets communicated with the water through holes; the filter element comprises a central tube, a plurality of filter membrane assemblies, a water inlet, a raw water outlet, a pure water bag, a raw water inlet, a raw water bag, a raw water inlet, a raw water bag and a raw water outlet. The utility model discloses a reverse osmosis filter core, the inflow is many, and pure water flow is big, washes purifying effect good. Purifier includes above-mentioned reverse osmosis filter core, can promote the quality of water of the first cup of water after the standing, has dirty advantage that stifled risk is little and pure water flux is big concurrently.

Description

Reverse osmosis filter core and purifier

Technical Field

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

Background

Reverse osmosis is a process of separating water molecules from solutes in a water body by using the selective permeability that a selective membrane can only permeate water but cannot permeate solutes, with the pressure higher than the osmotic pressure as a driving force; reverse osmosis water purification is a water treatment method using the above reverse osmosis principle. The core structure of most reverse osmosis water purifiers on the market is a reverse osmosis filter element, and the existing reverse osmosis filter element consists of a central tube and a reverse osmosis membrane. The reverse osmosis membrane is folded along the functional surface to form a raw water bag; and forming a pure water bag between the two same folded membranes, and then rolling the reverse osmosis membrane into a central pipe to manufacture the reverse osmosis filter element. Raw water enters from one end face of the reverse osmosis filter element, the raw water enters the raw water bag and is filtered by the reverse osmosis membrane, concentrated water formed by filtering flows out from the other end face of the reverse osmosis filter element, and pure water formed by filtering flows out from the central tube. The water inlet and outlet structure ensures that the reverse osmosis filter element is always in a concentrated water environment in the water production process and the standing process; when the water purifier is used after standing for a period of time, the concentrated water can permeate to one side of the pure water due to the osmosis of salt ions, so that the Total Dissolved Solids (TDS) of the first cup of water is large and the water cannot be drunk.

Moreover, the water flow direction ensures that a filtering flow channel of raw water is short, the flushing effect on the reverse osmosis membrane is poor and the flushing is not uniform during the flushing process, and the position close to the central tube is easy to scale and block, so that the service life of the reverse osmosis filter element is shortened; the concentrated water near the central tube has high impurity concentration and serious concentration polarization, resulting in increased osmotic pressure and lowered pure water flow.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a reverse osmosis filter core, the inflow is many, and pure water flow is big, washes purifying effect good.

To achieve the purpose, the utility model adopts the following technical proposal:

there is provided a reverse osmosis cartridge comprising:

the central pipe is provided with a plurality of water through holes penetrating through the pipe wall, two ends of the central pipe are provided with concentrated water outlets for discharging concentrated water, and the concentrated water outlets are communicated with the water through holes;

the filter element comprises a central tube, a plurality of filter membrane components and a water filter, wherein the central tube is wound by the filter membrane components to form a filter element main body, two end faces of the filter element main body are provided with raw water inlets, the side face of the filter element main body is provided with a pure water outlet, a raw water bag and a pure water bag are arranged in the filter element main body, the raw water bag is communicated with the water passing hole and the raw water inlets, and the filter membrane components can filter raw water in the raw water bag to form pure water and concentrated water.

As an optimized structure of the utility model, it is a plurality of the range upon range of setting of filter membrane module, raw water bag set up in adjacent two between the filter membrane module, the pure water bag set up in the filter membrane module.

As a preferred structure of the utility model, the filter membrane subassembly includes two-layer osmotic membrane, the osmotic membrane includes water purification layer and filter layer, and is two-layer the water purification layer sets up relatively and interconnect is in order to form the pure water bag.

As a preferred structure of the utility model, the filter membrane module still includes first viscose layer, first viscose layer is connected relative two the water purification layer, so that the pure water delivery port set up in the filter membrane module is kept away from the one end of center tube.

As a preferred structure of the utility model, it is two-layer the osmotic membrane is by the one deck the osmotic membrane fifty percent discount forms, pure water delivery port and the broken line sets up relatively, first viscose layer includes first banding and second banding, follows the axial of center tube, first banding with the second banding set up respectively in the both ends edge of water purification layer.

As an optimized structure of the utility model, the filter membrane component further comprises a second adhesive layer, the second adhesive layer is connected with two adjacent filter layers to form the raw water bag.

As a preferred structure of the present invention, the second adhesive layer includes a third edge seal, a fourth edge seal and a fifth edge seal; the edge of the filter layer is provided with a third sealing edge and a fourth sealing edge, the third sealing edge and the fourth sealing edge are respectively arranged at the edges of two ends of the filter layer, and the fifth sealing edge is arranged at the position, far away from the filter layer, of one end and two ends of the center pipe and is respectively connected with the third sealing edge and the fourth sealing edge.

As a preferred structure of the utility model, the third banding with the fourth banding all is provided with the breach in order to form the raw water inlet.

As an optimized structure of the utility model, two the breach sets up or dislocation set relatively.

As a preferred structure of the utility model, the ratio of the length of the gap to the length of the third sealing edge or the fourth sealing edge is 1/3-1/4.

As a preferred structure of the present invention, the notch and the distance between the central tubes is greater than the third sealing edge or half of the length of the fourth sealing edge.

As the utility model discloses a preferred structure, the filter membrane subassembly still includes the preliminary treatment frame, the preliminary treatment frame encloses to be located around the filter layer, the laminating of second viscose layer connect in the preliminary treatment frame.

As a preferred structure of the utility model, the preliminary treatment frame includes end to end's first frame and second frame, first frame set up in the both ends of filter core main part, the second frame is followed the axial extension of center tube, the width of first frame is greater than the width of second frame.

As an optimized structure of the utility model, the reverse osmosis filter core still includes pure water diversion net and raw water diversion net, the pure water diversion net set up in the pure water bag, the raw water diversion net set up in the raw water bag.

As the utility model discloses an optimal structure, the reverse osmosis filter core still includes the sealed rete, the sealed rete encircles the filter membrane subassembly, the sealed rete is provided with a plurality of apopores, the apopore can communicate pure water delivery port.

Another object of the utility model is to provide a water purification device, the reverse osmosis filter core that it has can promote the quality of water of the first cup of water behind the static, has the advantage that dirty stifled risk is little and pure water flux is big concurrently.

To achieve the purpose, the utility model adopts the following technical proposal:

a purifier, includes as above-mentioned reverse osmosis filter core, still includes the casing, reverse osmosis filter core set up in the casing.

The utility model has the advantages that:

the utility model provides a reverse osmosis filter core, raw water inlet are located the both ends face of filter core body, and dense water delivery port is located the center tube both ends, and the pure water delivery port is located the side of filter core body, and the mode that this kind of terminal surface advances raw water, center tube play dense water, and the area of intaking is big, and the inflow is many, satisfies big flux water purification requirement, promotes the pure water flow; when washing, because the area of intaking is far greater than the play water area, under the certain circumstances of inflow, the play water area is less, and it is faster to wash the velocity of flow, and the velocity of flow of washing from the concentrated water of center tube exhaust is bigger, and in addition, the former water inlet sets up the position at the both ends face of filter core body, and the flow resistance of former water is little, and is effectual to washing of former water bag, reduces the stifled condition of dirt of filter membrane subassembly. Concentrated water after the concentration is discharged from the central tube in time, the concentrated water amount remained in the raw water bag is relatively reduced, and the concentration polarization layer is improved, so that the back pressure of the filter membrane component is reduced, the effective driving pressure is increased, the scaling of the high-concentration concentrated water on the surface of the filter membrane component is reduced, and the flux and the service life of the filter membrane component are prolonged. The filtered pure water flows out through a pure water outlet of the pure water bag, and the pure water outlet is positioned on the side surface of the filter element body, so that the side surface of the reverse osmosis filter element is used for discharging water; when the reverse osmosis filter element is made into a filter flask, the filter flask is filled with pure water, so that a pure water bubble membrane is realized, the osmotic pressure caused by concentration polarization is improved under the condition of long-time stop use, and the permeation of concentrated water to one side of the pure water is avoided.

The utility model provides a purifier, including foretell reverse osmosis filter core, realize that the filter core terminal surface advances raw water, the center tube goes out the business turn over water mode of dense water, filter core side play pure water for reverse osmosis filter core in the casing is in the pure water environment, improves the osmotic pressure that the concentration polarization leads to. Improving the water quality of the first cup of water; and, the area of intaking is big, and the inflow is many, has dirty stifled advantage that the risk is little and pure water flux is big concurrently.

Drawings

FIG. 1 is a sectional view of a reverse osmosis cartridge according to the prior art;

fig. 2 is a schematic structural diagram of a reverse osmosis filter element provided by an embodiment of the present invention;

FIG. 3 is a cross-sectional view of the filter membrane module according to an embodiment of the present invention before being wound;

FIG. 4 is a schematic diagram of a permeable membrane according to an embodiment of the present invention;

FIG. 5 is a schematic view showing a filter membrane module according to an embodiment of the present invention before being wound;

FIG. 6 is a schematic structural view II of the filter membrane module provided in the embodiment of the present invention before being wound;

FIG. 7 is a schematic structural view III of the filter membrane module provided by the embodiment of the present invention before being wound;

fig. 8 is a schematic structural diagram of a preprocessing frame provided in an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a center tube according to an embodiment of the present invention.

In the figure:

1. a central tube; 11. water passing holes; 12. a concentrated water outlet; 2. a filter membrane assembly; 21. a raw water bag; 22. a pure water bag; 221. a pure water outlet; 23. a permeable membrane; 231. a water purification layer; 232. a filter layer; 233. a support layer; 24. a first adhesive layer; 241. first edge sealing; 242. second edge sealing; 25. a second adhesive layer; 251. thirdly, sealing edges; 252. fourthly, sealing edges; 253. fifth edge sealing; 254. a notch; 26. a pre-processing frame; 261. a first frame; 262. a second frame; 3. a pure water diversion net; 4. a raw water diversion net; 5. a sealing film layer; 51. a water outlet hole;

100. an inner tube; 200. a reverse osmosis membrane; 300. a pure water drainage net; 400. a raw water diversion net; 500. a raw water bag; 600. a pure water bag.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used in the orientation or positional relationship shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to be limiting.

Reverse osmosis is a process of separating water molecules from solutes in a water body by using the selective permeability that a selective membrane can only permeate water but cannot permeate solutes, with the pressure higher than the osmotic pressure as a driving force; reverse osmosis water purification is a water treatment method using the above reverse osmosis principle. The core structure of most reverse osmosis water purifiers on the market is a reverse osmosis filter element, and as shown in fig. 1, the existing filter element consists of an inner tube 100, a reverse osmosis membrane 200, a pure water diversion network 300 and a raw water diversion network 400. The reverse osmosis membrane 200 is folded in half, and the raw water diversion net 400 is placed in the middle to form a raw water bag 500; the pure water drainage net 300 is placed between two identical folded reverse osmosis membranes 200, the adjacent reverse osmosis membranes 200 are bonded to form a pure water bag 600, and finally, the reverse osmosis membranes 200 are rolled on the inner tube 100 to form the filter element. Raw water enters the raw water bag 500 from the end face of the filter element and is filtered by the reverse osmosis membrane 200, the filtered concentrated water flows out from the other end face of the reverse filter element, and the filtered pure water flows out from the inner tube 100. The water flow direction is that raw water enters from one end face of the filter element, concentrated water is discharged from the other end face of the filter element, and pure water is discharged from both ends of the inner tube 100, and the arrows in fig. 1 indicate the water flow direction. This kind of water inlet and play water structure makes the filter core be in concentrated water environment at the system water in-process and the in-process of stewing always, when the purifier stood a period and used again, because salt ion's osmosis, concentrated water can permeate to pure water one side, causes the Total Dissolved Solids (TDS) of first glass of water great, can not drunk. Moreover, the axial length of the filtering flow passage of the raw water is equal to that of the inner tube 100, the filtering flow passage is shorter, the flushing effect on the reverse osmosis membrane 200 is not uniform during the flushing process, and the position close to the inner tube 100 is more easily fouled due to the membrane rolling pressure, so that the service life of the reverse osmosis filter element is shortened; therefore, the embodiment of the utility model provides a reverse osmosis filter core to solve above-mentioned problem.

As shown in fig. 2, 3 and 9, the reverse osmosis filter element of the present embodiment includes a central tube 1 and a plurality of filter membrane assemblies 2, the central tube 1 is provided with a plurality of water holes 11 penetrating through a tube wall, two ends of the central tube 1 are provided with concentrated water outlets 12 for discharging concentrated water, and the concentrated water outlets 12 are communicated with the water holes 11; the plurality of filter membrane assemblies 2 are wound on the central tube 1 to form a filter element main body, two end faces of the filter element main body are provided with raw water inlets, a pure water outlet 221 is formed in the side face of the filter element main body, a raw water bag 21 and a pure water bag 22 are arranged in the filter element main body, the raw water bag 21 is communicated with the water through hole 11 and the raw water inlets, and the filter membrane assemblies 2 can filter raw water in the raw water bag 21 to form pure water and concentrated water.

The reverse osmosis filter element of the embodiment adopts the mode that raw water enters the end face of the filter element body and concentrated water exits from the central tube 1, so that the water inlet area is large, the water inlet amount is large, the requirement of large-flux water purification is met, and the flow of pure water is increased; when washing, because the area of intaking is far greater than the play water area, under the certain circumstances of inflow, the play water area is less, and it is faster to wash the velocity of flow, and the velocity of flow of washing from the concentrated water of central siphon 1 exhaust is bigger, and in addition, the raw water inlet sets up in filter element body terminal surface position, and the flow resistance of raw water is little, and is effectual to washing of raw water bag 21, reduces the stifled condition of dirt of filter membrane module 2. The concentrated water is discharged from the central pipe 1 in time, the concentrated water amount remained in the raw water bag 21 is relatively reduced, and the concentration polarization layer is improved, so that the back pressure of the filter membrane component 2 is reduced, the effective driving pressure is increased, the scale formation of the high-concentration concentrated water on the surface of the filter membrane component 2 is reduced, the flux is improved, and the service life of the filter membrane component 2 is prolonged. The filtered pure water flows out through a pure water outlet 221 of the pure water bag 22, and the pure water outlet 221 is positioned on the side surface of the wound reverse osmosis filter element, so that the side surface water outlet of the reverse osmosis filter element is realized; when the reverse osmosis filter core made the filter flask, be full of the pure water in the filter flask, realize the pure water bubble membrane, under the condition of long-time stop use, improve the osmotic pressure that concentration polarization leads to, avoid dense water to pure water one side infiltration, the quality of water of first cup of water obtains very big promotion.

In one embodiment, a plurality of filter membrane modules 2 are stacked, a raw water bag 21 is formed between adjacent filter membrane modules 2, and the raw water bag 21 is communicated with the water through hole 11; it can be understood that one end of the filter membrane module 2 is connected with the central tube 1, the adjacent filter membrane modules 2 are staggered and overlapped, and a plurality of filter membrane modules 2 are stacked and jointly wound on the central tube 1; a raw water bag 21 is formed between adjacent filter membrane modules 2, and thus, a plurality of raw water bags 21 are provided at different positions along the outer circumference of the central tube 1. Fig. 2 schematically shows a structure in which 2 filter membrane modules 2 are stacked, and actually, other numbers of filter membrane modules 2 may be provided. The raw water bag 21 is provided with a raw water inlet which is positioned at two ends of the filter membrane component 2 along the axial direction of the central tube 1; therefore, when the filter membrane module 2 is wound around the central tube 1, the raw water inlet is positioned at both end surfaces of the reverse osmosis filter element, that is, the raw water flows in through both end surfaces of the reverse osmosis filter element. The pure water bag 22 is arranged in the filter membrane component 2, the pure water bag 22 is provided with a pure water outlet 221, the pure water outlet 221 is positioned at one end of the filter membrane component 2 far away from the central tube 1, and the filter membrane component 2 can filter raw water in the raw water bag 21 to form pure water and concentrated water. Raw water enters the raw water bag 21 through the raw water inlet, and is filtered by the reverse osmosis of the filter membrane component 2, formed concentrated water flows to the central tube 1 along the winding direction and is discharged through the concentrated water outlets 12 at two ends of the central tube 1, a water flow channel of the raw water extends along the winding direction, and the water flow channel is longer, so that the membrane utilization rate of the filter membrane component 2 is higher, and the membrane flushing effect is improved.

In order to facilitate the discharge of the concentrated water, the concentrated water outlets 12 on the central tube 1 may be designed according to the flux, and the concentrated water discharging speed is faster by arranging more concentrated water outlets 12, and the concentrated water outlets 12 may be circular, square or other irregular shapes, not limited to the drawings of this embodiment.

Specifically, the filter membrane module 2 is formed by folding the permeable membrane 23 in half, and the permeable membrane 23 includes a water purification layer 231, a support layer 233, and a filtration layer 232, as shown in fig. 4. The support layer 233 is disposed between the water purification layer 231 and the filtration layer 232, and the permeable membrane 23 is folded in half so that the water purification layer 231 is disposed opposite to each other, thereby forming the pure water bag 22. The water-purifying layer 231 is generally made of a nonwoven fabric, and the filter layer 232 is made of a polyamide film. The polyamide membrane is a high polymer material, is an artificial semipermeable membrane with certain characteristics, and has the advantages of small aperture and good filtering performance.

Preferably, the filter membrane assembly 2 further includes a first adhesive layer 24, as shown in fig. 5, the first adhesive layer 24 is connected to the opposite water purification layer 231, the first adhesive layer 24 includes a first sealing edge 241 and a second sealing edge 242, the first sealing edge 241 and the second sealing edge 242 are respectively disposed on two end edges of the water purification layer 231 along the axial direction of the center tube 1, the first sealing edge 241 and the second sealing edge 242 extend along the winding direction, and a pure water outlet 221 is formed between one end of the first sealing edge 241 away from the center tube 1 and one end of the second sealing edge 242 away from the center tube 1. The first sealing edge 241, the second sealing edge 242 and the folded edges of the permeable membrane 23 form the pure water bag 22 together, and the structure is simple, so that the processing difficulty is reduced. The arrows in fig. 5 indicate the flow direction of pure water.

Preferably, the filter membrane assembly 2 further includes a second adhesive layer 25, as shown in fig. 6, the second adhesive layer 25 connects two adjacent filter layers 232, the second adhesive layer 25 includes a third sealed edge 251, a fourth sealed edge 252, and a fifth sealed edge 253, along the axial direction of the central tube 1, the third sealed edge 251 and the fourth sealed edge 252 are respectively disposed at two end edges of the filter layers 232, the third sealed edge 251 and the fourth sealed edge 252 extend along the winding direction, and the fifth sealed edge 253 is disposed at one end of the filter layers 232 away from the central tube 1 and extends along the axial direction of the central tube 1. More specifically, the third and fourth sealing edges 251 and 252 are each provided with a notch 254 to form a raw water inlet. After two adjacent filter membrane assemblies 2 are bonded through the second adhesive layer 25, the raw water bag 21 is formed between the two filter membrane assemblies 2, a raw water inlet is formed at the notch 254, the second adhesive layer 25 is not arranged at one end of each filter membrane assembly 2 close to the central tube 1, and the two filter membrane assemblies are not bonded, so that the raw water bag 21 is communicated with the water through hole 11 in the central tube 1, the raw water flows to the central tube 1 after passing through the notch 254 and being filtered, and the arrows in fig. 6 indicate the flowing directions of the raw water and the concentrated water.

More specifically, the two notches 254 are disposed opposite or offset. As shown in fig. 6, the two notches 254 are disposed oppositely and located at the intersection of the third sealing edge 251 and the fifth sealing edge 253 and the intersection of the fourth sealing edge 252 and the fifth sealing edge 253, and the arrangement position of the raw water inlet of the raw water bag 21 makes the raw water bag 21 have no viscose dead angle, so that the problem of faster scaling caused by that part of the surface of the permeable membrane 23 cannot be washed out is solved. In another embodiment, as shown in fig. 7, two notches 254 are disposed in a staggered manner, wherein one notch 254 is located at the intersection of the third sealing edge 251 and the fifth sealing edge 253, and the other notch 254 is located at the middle position of the fourth sealing edge 252, and this positional relationship can prevent the raw water at the two ends from being flushed when entering water, so as to improve the flowability and the filtration efficiency of the raw water. Optionally, the distance between the notch 254 and the central tube 1 is greater than half of the length of the third sealing edge 251 or the fourth sealing edge 252, that is, the notch 254 needs to be disposed in the other half area of the fourth sealing edge 252 away from the central tube 1, so that after the filter membrane assembly 2 is wound on the central tube 1, the raw water inlet can also be located away from the central tube 1 and in the area on the end surface of the reverse osmosis filter element close to the outer edge. It can be understood that the filter membrane component 2 is wound on the central tube 1, along the winding direction under the condition that the number of winding turns is increased, the pressure of the region close to the outer edge on the end surface of the reverse osmosis filter element is smaller than the pressure of the region close to the central tube 1, the raw water inlet is arranged at the region position with smaller pressure, the water inlet resistance of the raw water is favorably reduced, and the flowing performance of the raw water is improved.

Preferably, the ratio of the length of the notch 254 to the length of the third edge seal 251 or the fourth edge seal 252 is 1/3 to 1/4. The length of the notch 254 can limit the area of the raw water inlet, thereby ensuring the inflow flux of raw water.

Preferably, the filter membrane module 2 further includes a pretreatment frame 26, the pretreatment frame 26 is disposed around the filter layer 232, and the second adhesive layer 25 is attached to the pretreatment frame 26. Since the permeable membrane 23 is used as the polyamide layer of the filter layer 232 and has poor adhesive performance, the second adhesive layer 25 is disposed on the filter layer 232, and the second adhesive layer 25 is easily damaged after long-term use, which may cause the raw water bag 21 to be broken. In order to ensure the stability of the reverse osmosis filter element, a pretreatment frame 26 is arranged around the filter layer 232 as a reserved viscose margin, as shown in fig. 8. The pre-treatment frame 26 may be formed by removing the filter layer 232 in this area over the support layer 233.

Preferably, the preprocessing frame 26 includes a first frame 261 and a second frame 262, the first frame 261 extends in the winding direction, the second frame 262 extends in the axial direction of the center pipe 1, and the width of the first frame 261 is greater than the width of the second frame 262. As shown in fig. 8, D1 is the width of the first frame 261, D2 is the width of the second frame 262, D2 is not less than D1, and D2 is not less than 10mm, so as to ensure that the second adhesive layer 25 has sufficient adhesion stability. The reverse osmosis filter element after winding needs to be cut at both ends to ensure the end surface smoothness, and therefore, the width of the first frame 261 needs to be larger than that of the second frame 262.

Optionally, the reverse osmosis filter element further comprises a pure water diversion net 3 and a raw water diversion net 4, the pure water diversion net 3 is arranged in the pure water bag 22, and the raw water diversion net 4 is arranged in the raw water bag 21. The pure water guiding net 3 supports the adjacent pure water layers 231 to form a pure water flow path for guiding the flow direction of the pure water in the pure water bag 22; similarly, the raw water flow guiding net 4 supports the adjacent filter layers 232 to form a raw water flow passage for guiding the flow direction of the raw water in the raw water bag 21.

As preferred scheme, the reverse osmosis filter core still includes sealed rete 5, and sealed rete 5 encircles filter membrane module 2, and sealed rete 5 is provided with a plurality of apopores 51, and apopore 51 can communicate pure water bag 22. The sealing film layer 5 can be formed by sleeving a sealing glue outside the filter membrane component 2. The sealing film layer 5 is provided with a plurality of water outlet holes 51, as shown in fig. 2, the shape of the water outlet hole 51 may be a plurality of shapes such as a circular hole, which is not limited to the drawings of the present embodiment.

The reverse osmosis filter element of the present embodiment is rolled as follows:

1. the permeable membrane 23 is folded in half, the pure water diversion net 3 is placed, and the filter membrane component 2 with the pure water bag 22 is formed by bonding through the first adhesive layer 24;

2. arranging a second adhesive layer 25 on the filter membrane assemblies 2, stacking a plurality of filter membrane assemblies 2, arranging a raw water diversion net 4 between adjacent filter membrane assemblies 2, and bonding the filter membrane assemblies through the second adhesive layer 25 to form a raw water bag 21;

3. connecting one end of the stacked filter membrane assemblies 2 with a central tube 1, and simultaneously winding the filter membrane assemblies 2 in a multi-layer manner in a tension membrane winding manner until the filter membrane assemblies 2 are completely wound on the central tube 1;

4. the periphery of the filter membrane component 2 is sleeved with a sealing membrane layer 5 to form the reverse osmosis filter element.

In the step 2, it is necessary to place a raw water guiding net 4 above the uppermost filter membrane module 2 or place a raw water guiding net 4 below the lowermost filter membrane module 2, so that a raw water bag 21 can be formed between the uppermost filter membrane module 2 and the lowermost filter membrane module 2 during winding, thereby improving the utilization rate of the permeable membranes 23.

The embodiment of the utility model provides a still provide a purifier simultaneously, purifier include foretell reverse osmosis filter core, and purifier still includes the casing, and the reverse osmosis filter core sets up in the casing. The reverse osmosis filter element of the water purifying device realizes the water inlet and outlet modes of raw water inlet at the end face of the filter element, concentrated water outlet at the central tube 1 and pure water outlet at the side face of the filter element, so that the reverse osmosis filter element in the shell is positioned in a pure water environment, and the osmotic pressure caused by concentration polarization is improved. Improving the water quality of the first cup of water; and, the area of intaking is big, and the inflow is many, has dirty stifled advantage that the risk is little and pure water flux is big concurrently.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (16)

1. A reverse osmosis cartridge, comprising:

the water pipe comprises a central pipe (1), wherein a plurality of water through holes (11) penetrating through the pipe wall are formed in the central pipe (1), concentrated water outlets (12) used for discharging concentrated water are formed in two ends of the central pipe (1), and the concentrated water outlets (12) are communicated with the water through holes (11);

the filter core comprises a plurality of filter membrane assemblies (2), wherein the filter membrane assemblies (2) are wound on a central tube (1) to form a filter core main body, raw water inlets are formed in two end faces of the filter core main body, a pure water outlet (221) is formed in the side face of the filter core main body, a raw water bag (21) and a pure water bag (22) are formed in the filter core main body, the raw water bag (21) is communicated with the water through hole (11) and the raw water inlets, and the filter membrane assemblies (2) can filter raw water in the raw water bag (21) to form pure water and concentrated water.

2. A reverse osmosis filter element according to claim 1, wherein a plurality of the filter membrane modules (2) are arranged in a stacked manner, the raw water bag (21) is arranged between two adjacent filter membrane modules (2), and the pure water bag (22) is arranged in the filter membrane modules (2).

3. A reverse osmosis cartridge according to claim 1, wherein the membrane module (2) comprises two permeable membranes (23), the permeable membranes (23) comprising a purified water layer (231) and a filter layer (232), the two purified water layers (231) being arranged opposite and connected to each other to form the purified water bag (22).

4. A reverse osmosis filter cartridge according to claim 3, wherein the filter membrane assembly (2) further comprises a first adhesive layer (24), and the first adhesive layer (24) connects the two opposite purified water layers (231) so that the purified water outlet (221) is arranged at one end of the filter membrane assembly (2) far away from the central tube (1).

5. The reverse osmosis filter cartridge according to claim 4, wherein two layers of the osmosis membranes (23) are formed by folding one layer of the osmosis membranes (23), the pure water outlet (221) and the folding line are oppositely arranged, the first adhesive layer (24) comprises a first sealing edge (241) and a second sealing edge (242), and the first sealing edge (241) and the second sealing edge (242) are respectively arranged at two end edges of the pure water layer (231) along the axial direction of the central tube (1).

6. A reverse osmosis cartridge according to claim 3 wherein the filter membrane module (2) further comprises a second glue layer (25), the second glue layer (25) connecting two adjacent filter layers (232) to form the raw water bag (21).

7. The reverse osmosis cartridge of claim 6, wherein the second adhesive layer (25) comprises a third seal edge (251), a fourth seal edge (252), and a fifth seal edge (253); along the axial direction of center tube (1), third banding (251) with fourth banding (252) set up respectively in the both ends edge of filter layer (232), fifth banding (253) set up in keep away from on filter layer (232) one end and both ends of center tube (1) connect respectively third banding (251) with fourth banding (252).

8. The reverse osmosis filter cartridge of claim 7, wherein the third and fourth sealing edges (251, 252) are each provided with a notch (254) to form the raw water inlet.

9. The reverse osmosis cartridge of claim 8, wherein the notches (254) are disposed in an opposing or offset arrangement.

10. The reverse osmosis filter cartridge of claim 8, wherein the ratio of the length of the notch (254) to the length of the third seal edge (251) or the fourth seal edge (252) is 1/3 to 1/4.

11. The reverse osmosis cartridge of claim 8, wherein the distance between the notch (254) and the central tube (1) is greater than half the length of the third seal (251) or the fourth seal (252).

12. The reverse osmosis filter element of claim 6, wherein the filter membrane assembly (2) further comprises a pretreatment frame (26), the pretreatment frame (26) is arranged around the filter layer (232), and the second adhesive layer (25) is attached to the pretreatment frame (26).

13. The reverse osmosis cartridge of claim 12, wherein the pre-treatment frame (26) comprises first and second end-to-end rims (261, 262), the first rim (261) being disposed at opposite ends of the cartridge body, the second rim (262) extending axially of the centre tube (1), the first rim (261) having a width greater than the width of the second rim (262).

14. A reverse osmosis filter element according to any one of claims 1-13, further comprising a pure water conducting net (3) and a raw water conducting net (4), wherein the pure water conducting net (3) is arranged in the pure water bag (22) and the raw water conducting net (4) is arranged in the raw water bag (21).

15. A reverse osmosis filter cartridge according to any one of claims 1-13, further comprising a sealing membrane layer (5), wherein the sealing membrane layer (5) surrounds the filter membrane assembly (2), and wherein the sealing membrane layer (5) is provided with a plurality of outlet holes (51), and wherein the outlet holes (51) are in communication with the pure water outlet (221).

16. A water purification apparatus comprising the reverse osmosis cartridge of any one of claims 1-15, and further comprising a housing, the reverse osmosis cartridge being disposed within the housing.

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