Reverse osmosis membrane filter element components for drinking water purification

Abstract

The present invention relates to the technical field of water purification equipment, in particular to a reverse osmosis membrane filter element assembly for drinking water purification, comprising a filter unit for purifying raw water and a water storage unit for backwashing the filter unit; the filter unit comprises a rotatable swivel, a plurality of collecting slot plates installed on the outer circumferential wall of the swivel, and two sealing plates installed on the left and right sides of the inside of the swivel, wherein the space between the two sealing plates is connected with each collecting slot plate and constitutes a water purification space; by purifying raw water with a reverse osmosis membrane and backwashing the reverse osmosis membrane with part of the purified water after purification, impurities on the reverse osmosis membrane can be quickly removed, thereby ensuring that the reverse osmosis membrane always has a high fluidity, so that the normal and stable supply effect of pure water can be achieved, and the tedious operation of frequent disassembly and assembly of the filter element can be avoided, thereby improving the convenience of equipment use and avoiding the problem of reduced service life of the equipment due to frequent disassembly and assembly.

Description

Technical Field

[0001] The invention relates to the technical field of water purification equipment, in particular to a reverse osmosis membrane filter element assembly for drinking water purification. Background Art

[0002] A water dispenser is one of the essential household appliances in people's daily life. The water dispenser can purify raw water to obtain pure water for people's drinking. The main working unit of the water dispenser is the filter element, which can filter and intercept impurities in the raw water. With the development of science and technology and the continuous improvement of people's requirements for raw water purification, reverse osmosis membrane filter elements have gradually become popular. This type of filter element can filter the raw water more carefully through the reverse osmosis membrane, so as to effectively intercept tiny particles, bacteria, viruses and other impurities in the raw water.

[0003] The shape of the reverse osmosis membrane filter element is generally cylindrical. When it is used, the raw water is pressurized so that the raw water can pass through the reverse osmosis membrane and reach the clean water pipeline. The intercepted concentrated water rich in impurities is discharged into the wastewater pipeline. After the filter element has been used for a long time, a large amount of impurities will adhere to it, which seriously affects the water flowability and purification effect. It needs to be disassembled for cleaning and then reassembled. This method causes the water flow in the clean water pipeline to gradually decrease in each cycle, and normal water supply cannot be maintained. At the same time, the operation of disassembling and cleaning the filter element is relatively cumbersome. Frequent disassembly and assembly will lead to a reduction in the service life of the equipment. In order to solve the above problems, the present invention provides a reverse osmosis membrane filter element assembly for drinking water purification. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a reverse osmosis membrane filter element assembly for drinking water purification, and the specific technical solution adopted is:

[0005] A reverse osmosis membrane filter element assembly for drinking water purification, comprising a filter unit for purifying raw water and a water storage unit for backwashing the filter unit;

[0006] The filtration unit comprises a rotatable rotating ring, a plurality of collecting slot plates installed on the outer circumferential wall of the rotating ring, and two sealing plates installed on the left and right sides of the rotating ring, wherein the space between the two sealing plates is connected with each collecting slot plate and forms a water purification space, the outer side of each collecting slot plate is covered with a reverse osmosis membrane, the outer side of each reverse osmosis membrane is covered with a shaping buckle plate, the shaping buckle plate is fixed on the rotating ring, and the collecting slot plates and the shaping buckle plates are densely covered with water holes, so that the raw water enters the water purification space through the water holes, the shaping buckle plates, the reverse osmosis membrane and the collecting slot plates, and at the same time, the collecting slot plates and the reverse osmosis membranes and shaping buckle plates thereon form a water purification group;

[0007] The water storage unit consists of two isolation areas distributed up and down and two storage areas distributed left and right, one of which is used to store raw water and the other is used to store concentrated water. When the water purification group passes through the isolation area, the inner wall of the isolation area blocks the water holes on the shaping plate, thereby isolating the two storage areas from each other.

[0008] Optimized in the above implementation, the reverse osmosis membrane is composed of the same multi-layer filtration structure, each filtration structure is composed of a membrane layer, a support layer, an intermediate layer and a cushion layer;

[0009] Among them, the membrane layer is used to filter and treat the raw water;

[0010] The support layer is used to support the membrane layer to improve its mechanical strength and stability;

[0011] The interlayer is used to reduce the pressure loss when water passes through the membrane layer;

[0012] The cushion layer is used to form a channel between the interlayer in a group of filtration structures and the membrane layer in the adjacent filtration structure, and the channel is used for concentrated water to flow.

[0013] Optimized in the above implementation, the reverse osmosis membrane also includes a membrane antifouling layer and a raw water guide layer located on the surface, wherein the membrane antifouling layer is located on the outside of the raw water guide layer, the membrane antifouling layer is used to reduce the accumulation of impurities on the membrane layer, and the raw water guide layer is used to make the raw water pass through the membrane layer evenly.

[0014] Optimized in the above implementation, the shapes of the filtering structure, the membrane antifouling layer and the raw water diversion layer are all irregular.

[0015] Optimized in the above implementation, the reverse osmosis membrane and the shaping gusset plate are provided with holes, a convex block is fixed on the collecting tank plate, and the end surface of the convex block passes through the holes on the reverse osmosis membrane and the holes on the shaping gusset plate and is flush with the outer wall of the collecting tank plate;

[0016] Among them, a plurality of discharge channels are opened on the end surface of the convex block, and the plurality of discharge channels extend to different depth positions of the holes on the reverse osmosis membrane.

[0017] Optimized in the above implementation, the edge of the reverse osmosis membrane is adhered by glue.

[0018] Optimized in the above implementation, the water storage unit is provided with a diversion channel, and the diversion channel is located on one side of the storage area for storing concentrated water.

[0019] Optimized in the above implementation, each storage area on the water storage unit is connected to a first water pipe, wherein the first water pipe on the storage area for storing concentrated water is provided with a water valve;

[0020] A sealing plate on the rotating ring is provided with a rotating drum connected to the water purification space, spiral blades are provided inside the rotating drum, a supporting drum is provided on the outer wall of the rotating drum, and the rotating drum can rotate on the supporting drum, the rotating drum is connected to the supporting drum, and a second water pipe for connecting to external water-using equipment or a faucet is provided on the supporting drum.

[0021] Optimized in the above implementation, a side pressure device for detecting the pressure difference is provided between the storage area storing the raw water and the support cylinder;

[0022] The side pressure device includes a movable sleeve and two auxiliary tubes that are slidably inserted into the movable sleeve through the two ends of the movable sleeve, one of the auxiliary tubes is connected to the storage area, and the other auxiliary tube is connected to the support tube. A partition for blocking water is provided in the movable sleeve, and the partition is located between the two auxiliary tubes. The movable sleeve is connected to the auxiliary tube on the support tube through a spring and a pressure gauge.

[0023] Optimized in the above implementation, the water storage unit consists of a first shell and a second shell, the first shell and the second shell are interlocked and connected by bolts, the diversion channel and the first water pipe are both arranged on the first shell, the first shell and the second shell together form two isolation areas and two storage areas, and the second shell is provided with a plurality of connecting plates for fixing the filter element.

[0024] The advantages of the present invention are:

[0025] By using the reverse osmosis membrane to purify the raw water and backwashing the reverse osmosis membrane with part of the purified water, the impurities on the reverse osmosis membrane can be quickly removed, thereby ensuring that the reverse osmosis membrane always has a high fluidity. In this way, the normal and stable supply of pure water can be achieved, and the tedious operation of frequent disassembly and assembly of the filter element can be avoided, thereby improving the convenience of equipment use and avoiding the problem of reduced service life due to frequent disassembly and assembly of the equipment, thereby achieving the effect of long-term use of the filter element without disassembly and assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 yes Figure 1 Right view structural diagram;

[0029] Figure 3 yes Figure 1 Schematic diagram of explosion structure;

[0030] Figure 4 yes Figure 1 A schematic diagram of the enlarged structure of the middle filtration unit;

[0031] Figure 5 yes Figure 4 Schematic diagram of explosion structure;

[0032] Figure 6 yes Figure 5 Schematic diagram of the cross-sectional structure of the transfer ring;

[0033] Figure 7 yes Figure 5 Schematic diagram of the cross-sectional structure of the transfer ring from the right side;

[0034] Figure 8 yes Figure 5 Schematic diagram of the internal structure of the reverse osmosis membrane;

[0035] Fig. 9 yes Figure 5 A schematic diagram of the enlarged structure of the middle convex block in cross-section and top view;

[0036] Fig.10 yes Figure 2 A schematic diagram of the enlarged structure of the middle movable sleeve;

[0037] Fig.11 yes Figure 1 Schematic diagram of the enlarged structure of the water storage unit;

[0038] Fig.12 yes Fig.11 A schematic diagram of the structure of the first shell from the right side;

[0039] Markings in the accompanying drawings: 1. filtration unit; 2. water storage unit; 3. swivel; 4. collecting trough plate; 5. sealing plate; 6. reverse osmosis membrane; 7. shaping buckle plate; 8. isolation area; 9. storage area; 10. membrane layer; 11. supporting layer; 12. interlayer; 13. cushion layer; 14. membrane antifouling layer; 15. raw water guide layer; 16. bump; 17. discharge channel; 18. guide channel; 19. first water pipe; 20. water valve; 21. rotating drum; 22. spiral blade; 23. supporting drum; 24. second water pipe; 25. movable sleeve; 26. auxiliary pipe; 27. partition; 28. spring; 29. ​​pressure gauge; 30. first shell; 31. second shell; 32. connecting plate. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by “center”, “up”, “down”, “left”, “right”, “vertical”, “horizontal”, “inside” and “outside”, etc., are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred 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 present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. This embodiment is written in a progressive manner.

[0043] like Figures 1 to 7 , Fig.11 As shown, the reverse osmosis membrane filter element assembly for drinking water purification of the present invention comprises a filter unit 1 for purifying raw water and a water storage unit 2 for backwashing the filter unit 1;

[0044] The filtering unit 1 includes a rotatable rotating ring 3, a plurality of collecting slot plates 4 installed on the outer circumferential wall of the rotating ring 3, and two sealing plates 5 installed on the left and right sides of the rotating ring 3, wherein the space between the two sealing plates 5 is connected with each collecting slot plate 4 and constitutes a water purification space, the outer side of each collecting slot plate 4 is covered with a reverse osmosis membrane 6, the outer side of each reverse osmosis membrane 6 is covered with a shaping buckle plate 7, the shaping buckle plate 7 is fixed on the rotating ring 3, and the collecting slot plates 4 and the shaping buckle plates 7 are densely covered with water holes, so that the raw water enters the water purification space through the water holes, the shaping buckle plates 7, the reverse osmosis membrane 6 and the collecting slot plates 4, and at the same time, the collecting slot plates 4 and the reverse osmosis membrane 6 and the shaping buckle plates 7 thereon constitute a water purification group;

[0045] The water storage unit 2 consists of two isolation areas 8 distributed up and down and two storage areas 9 distributed left and right, one storage area 9 is used to store raw water, and the other storage area 9 is used to store concentrated water. When the water purification group passes through the isolation area 8, the inner wall of the isolation area 8 blocks the water holes on the shaping buckle plate 7, thereby isolating the two storage areas 9 from each other.

[0046] In detail, the rotating ring 3 is used to support the collecting tank plate 4, the sealing plate 5, the reverse osmosis membrane 6 and the shaping buckle plate 7, and the rotating ring 3 can drive the collecting tank plate 4, the sealing plate 5, the reverse osmosis membrane 6 and the shaping buckle plate 7 thereon to rotate, the collecting tank plate 4 is buckled on the outer wall of the rotating ring 3, and the collecting tank plate 4 is connected with the internal space of the rotating ring 3, combined with the two sealing plates 5 to block the internal space of the rotating ring 3, so that the space between the two sealing plates 5 and the space inside the multiple collecting tank plates 4 form a clean water space, so as to facilitate the storage of clean water, and the outer side of the collecting tank plate 4 is covered in sequence There are reverse osmosis membrane 6 and shaping gusset plate 7, shaping gusset plate 7 isolates reverse osmosis membrane 6 inside, raw water can pass through the water holes on shaping gusset plate 7, reverse osmosis membrane 6 and water holes on collecting tank plate 4 into water purification space, in this process, reverse osmosis membrane 6 purifies raw water, storage area 9 for storing raw water in two storage areas 9 is connected with water source pipeline, storage area 9 for storing concentrated water is connected with waste water pipeline, water purification group is rotating with rotating ring 3, it passes through two isolation areas 8 and two storage areas 9 continuously, when water purification group is located in isolation area 8 When the water purification group is in the storage area 9 for storing raw water, the water in the water source pipeline causes the raw water to pass through the water purification group and enter the water purification space due to the water pressure. At this time, due to the obstruction of the reverse osmosis membrane 6, the water pressure in the water purification space decreases, and the reverse osmosis membrane 6 intercepts impurities in the raw water. As the rotating ring 3 rotates, the reverse osmosis membrane 6 moves with the impurities. When the water purification group moves to the storage area 9 for storing concentrated water, the water purification space Part of the water in the space can reversely pass through the water purification group and enter the storage area 9. At this time, the water backwashes the reverse osmosis membrane 6 in the water purification group, so that the impurities intercepted by the reverse osmosis membrane 6 enter the storage area 9, and the reverse osmosis membrane 6 is cleaned. With the rotation of the rotating ring 3, the cleaned reverse osmosis membrane 6 moves again to the storage area 9 for storing raw water and purifies the raw water, thereby realizing continuous purification of the raw water and continuous backwashing and self-cleaning of the reverse osmosis membrane 6. The water in the water purification space can be used by people for daily use.

[0047] It should be pointed out here that due to the function of the two isolation areas 8, the two storage areas 9 can be isolated from each other. Even if a small amount of water leaks between the two storage areas 9 due to sealing problems, it will not affect the working effect of the filter element in purifying raw water, and the leakage problem can be solved by common sealing methods such as sealing rings and rubber strips.

[0048] By utilizing the reverse osmosis membrane 6 to purify the raw water and backwashing the reverse osmosis membrane 6 with part of the purified water, impurities on the reverse osmosis membrane 6 can be quickly removed, thereby ensuring that the reverse osmosis membrane 6 always has a high fluidity, thereby achieving a normal and stable supply of pure water, and avoiding the tedious operation of frequent disassembly and assembly of the filter element, thereby improving the convenience of equipment use, and avoiding the problem of reduced service life due to frequent disassembly and assembly of the equipment, thereby achieving the effect of long-term use of the filter element without disassembly and assembly.

[0049] like Figure 8 As shown, the reverse osmosis membrane 6 is composed of the same multi-layer filtration structure, and each layer of the filtration structure is composed of a membrane layer 10, a support layer 11, an interlayer 12 and a cushion layer 13;

[0050] Wherein, the membrane layer 10 is used to filter the raw water;

[0051] The support layer 11 is used to support the membrane layer 10 to improve its mechanical strength and stability;

[0052] The interlayer 12 is used to reduce the pressure loss when water passes through the membrane layer 10;

[0053] The cushion layer 13 is used to form a channel between the interlayer 12 in one filter structure and the membrane layer 10 in an adjacent filter structure, and the channel is used for concentrated water to flow.

[0054] In detail, the membrane layer 10 is the core layer of the filter element, and its main function is to separate soluble solids, ions, microorganisms, etc. in the raw water to produce clean water, and the membrane layer 10 can be made of materials such as polyacrylic acrylate, polyamide and polytetrafluoroethylene to present a microporous structure or a nanoporous structure, the supporting layer 11 can be made of materials such as polyester and polyethersulfone, the interlayer 12 is composed of a polyester grid or a spiral winding, and the cushion layer 13 is a multi-strip structure made of polyester fiber, and two adjacent strips are connected by lines made of the same material. By adopting the reverse osmosis membrane 6 of this structure, it is possible to enhance the filtering effect, improve its mechanical strength, and ensure the rapid discharge of concentrated water.

[0055] like Figure 8 As shown, the reverse osmosis membrane 6 also includes a membrane antifouling layer 14 and a raw water guiding layer 15 located on the surface, wherein the membrane antifouling layer 14 is located on the outside of the raw water guiding layer 15, the membrane antifouling layer 14 is used to reduce the accumulation of impurities on the membrane layer 10, and the raw water guiding layer 15 is used to allow the raw water to pass through the membrane layer 10 evenly.

[0056] In detail, the raw water guide layer 15 is located on the water inlet side of the reverse osmosis membrane 6, and is usually composed of a series of vertical or oblique small pipes or structures, which helps to reduce the resistance of water flow and improve the uniformity of water distribution. Since the surface of the reverse osmosis membrane is easily adsorbed with impurities, the presence of the membrane antifouling layer 14 can reduce the adsorption capacity of these pollutants on the membrane surface, preventing them from adhering and affecting the permeability of the membrane.

[0057] like Figure 8 As shown, the filtering structure, the membrane antifouling layer 14 and the raw water guiding layer 15 are all in irregular shapes.

[0058] In detail, by making the filter structure, the membrane antifouling layer 14 and the raw water guide layer 15 have a special shape, their working area can be increased, which facilitates improving the purification efficiency, and the special shape can be wavy, concave-convex, folded, etc., as long as it can increase the area of ​​the reverse osmosis membrane 6.

[0059] like Figure 5 and Fig. 9 As shown, holes are provided on the reverse osmosis membrane 6 and the shaping buckle plate 7, and a protrusion 16 is fixed on the collecting tank plate 4, and the end surface of the protrusion 16 passes through the holes on the reverse osmosis membrane 6 and the holes on the shaping buckle plate 7 and is flush with the outer wall of the collecting tank plate 4;

[0060] A plurality of discharge channels 17 are formed on the end surface of the protrusion 16 , and the plurality of discharge channels 17 extend to different depth positions of the holes on the reverse osmosis membrane 6 .

[0061] In detail, one end of the discharge channel 17 on the end surface of the protrusion 16 is set as the outlet end, and the other end of the discharge channel 17 is set as the inlet end. The depth of the inlet end of the multiple discharge channels 17 on the protrusion 16 is not easy, so that the multiple discharge channels 17 can correspond to the filter structures of different depths on the reverse osmosis membrane 6. The concentrate between two adjacent layers of filter structures can be discharged through the discharge channel 17, and this structure can make the multi-layer filter structures of different depths not communicate with each other, so as to avoid the concentrated water in the surface filter structure from flowing into the deep filter structure.

[0062] Furthermore, the edge of the reverse osmosis membrane 6 is bonded by glue.

[0063] In detail, in order to prevent the concentrated water between the multi-layer filtration structures in the reverse osmosis membrane 6 from flowing to the outside of the reverse osmosis membrane 6, the edge of the reverse osmosis membrane 6 can be sealed and bonded by glue.

[0064] like Fig.11 and Fig.12 As shown, the water storage unit 2 is provided with a guide channel 18, and the guide channel 18 is located at one side of the storage area 9 for storing concentrated water.

[0065] In detail, when the water purification group is in the isolation area 8, the isolation area 8 can block the multiple discharge channels 17 on the protrusion 16; when the water purification group is located in the storage area 9 storing raw water, the storage area 9 also blocks the multiple discharge channels 17 on the protrusion 16; when the water purification group is located in the storage area 9 storing concentrated water, the discharge channel 17 on the protrusion 16 can be connected to the inside of the storage area 9 through the guide channel 18. At this time, due to the backwashing effect, the concentrated water between adjacent filter structures can be discharged into the storage area 9 through the discharge channel 17, thereby quickly discharging the concentrated water between the two adjacent layers of filter structures.

[0066] It should be pointed out here that due to the backwashing effect, the concentrated water between two adjacent layers of the filter structure can be discharged, and at the same time, the impurities adsorbed on the membrane layer 10 can also be cleaned and separated from the membrane layer 10 through the backwashing effect.

[0067] like Figure 7 and Fig.11 As shown, each storage area 9 on the water storage unit 2 is connected to a first water pipe 19, wherein the first water pipe 19 on the storage area 9 for storing concentrated water is provided with a water valve 20;

[0068] A sealing plate 5 on the rotating ring 3 is provided with a rotating drum 21 connected to the water purification space, a spiral blade 22 is provided inside the rotating drum 21, a supporting drum 23 is provided on the outer wall of the rotating drum 21, and the rotating drum 21 can rotate on the supporting drum 23, the rotating drum 21 is connected to the supporting drum 23, and a second water pipe 24 for connecting to an external water-using device or a faucet is provided on the supporting drum 23.

[0069] In detail, the first water pipe 19 on the storage area 9 for storing raw water is connected to the raw water pipeline, and the first water pipe 19 on the storage area 9 for storing concentrated water is connected to the wastewater pipeline, thereby achieving the purpose of one water intake and one wastewater discharge. The water valve 20 can control the discharge of wastewater, and the purified pure water can be discharged through the rotating drum 21, the supporting drum 23 and the second water pipe 24. Due to the action of the water flow in the rotating drum 21, the spiral blades 22 can drive the rotating drum 21 to rotate, thereby driving the filter unit 1 to rotate.

[0070] It should be noted that, in order to rotate the drum 21 and the filter unit 1 , a micro motor may be used to provide power to the filter unit 1 .

[0071] like Fig.10 As shown, a side pressure device for detecting the pressure difference is provided between the storage area 9 storing the raw water and the support cylinder 23;

[0072] The side pressure device includes a movable sleeve 25 and two auxiliary pipes 26 that are slidably inserted into the movable sleeve 25 through the two ends of the movable sleeve 25, one of the auxiliary pipes 26 is connected to the storage area 9, and the other auxiliary pipe 26 is connected to the support tube 23. A partition 27 for blocking water is provided in the movable sleeve 25, and the partition 27 is located between the two auxiliary pipes 26. The movable sleeve 25 and the auxiliary pipes 26 on the support tube 23 are connected through a spring 28 and a pressure gauge 29.

[0073] In detail, the spring 28 can provide an elastic thrust for the movable sleeve 25, so that the movable sleeve 25 carries the partition 27 to seal and abut the secondary pipe 26 on the storage area 9. The pressure gauge 29 detects the pressure of the spring 28. When the raw water is purified normally, there is a water pressure difference between the storage area 9 and the support cylinder 23. At this time, the water pressure will push the movable sleeve 25 to move through the partition 27, and the spring 28 will undergo elastic deformation. The pressure gauge 29 detects the elastic force of the spring 28 in real time, thereby detecting the pressure difference. When the pressure difference reaches the specified value, the water valve 20 is opened to discharge the concentrated water. At this time, the filter element is backwashed.

[0074] In actual use, the water valve 20 can be controlled by a solenoid valve, and the automatic opening and closing of the water valve 20 can be realized by means of an electronic controller. At this time, the pressure gauge 29 can transmit the detection signal to the electronic controller.

[0075] like Fig.11 As shown, the water storage unit 2 is composed of a first shell 30 and a second shell 31, which are interlocked and connected by bolts, and the guide channel 18 and the first water pipe 19 are both arranged on the first shell 30. The first shell 30 and the second shell 31 together form two isolation areas 8 and two storage areas 9, and the second shell 31 is provided with a plurality of connecting plates 32 for fixing the filter element.

[0076] In detail, by combining the water storage unit 2 with the first shell 30 and the second shell 31, the filter element can be easily inspected and maintained, and assembly is also convenient.

[0077] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A reverse osmosis membrane filter element assembly for drinking water purification, characterized in that: It comprises a filtering unit (1) for purifying raw water and a water storage unit (2) for backwashing the filtering unit (1); The filtering unit (1) comprises a rotatable rotating ring (3), a plurality of collecting slot plates (4) mounted on the outer circumferential wall of the rotating ring (3), and two sealing plates (5) mounted on the left and right sides of the rotating ring (3), wherein the space between the two sealing plates (5) is connected to each collecting slot plate (4) and forms a water purification space, the outer side of each collecting slot plate (4) is covered with a reverse osmosis membrane (6), the outer side of each reverse osmosis membrane (6) is covered with a shaping buckle plate (7), the shaping buckle plate (7) is fixed on the rotating ring (3), and the collecting slot plates (4) and the shaping buckle plates (7) are densely covered with water holes, so that raw water enters the water purification space through the water holes, the shaping buckle plates (7), the reverse osmosis membrane (6) and the collecting slot plates (4), and the collecting slot plates (4) and the reverse osmosis membrane (6) and the shaping buckle plates (7) thereon form a water purification group; The water storage unit (2) is composed of two isolation areas (8) distributed vertically and two storage areas (9) distributed horizontally, wherein one storage area (9) is used to store raw water and the other storage area (9) is used to store concentrated water. When the water purification group passes through the isolation area (8), the inner wall of the isolation area (8) blocks the water holes on the shaping buckle plate (7), thereby isolating the two storage areas (9) from each other. Holes are provided on the reverse osmosis membrane (6) and the shaping buckle plate (7), a protrusion (16) is fixed on the collecting tank plate (4), and the end surface of the protrusion (16) passes through the hole on the reverse osmosis membrane (6) and the hole on the shaping buckle plate (7) and is flush with the outer wall of the collecting tank plate (4); A plurality of discharge channels (17) are provided on the end surface of the protrusion (16), and the plurality of discharge channels (17) extend to different depth positions of the holes on the reverse osmosis membrane (6).

2. The reverse osmosis membrane filter element assembly for drinking water purification according to claim 1, characterized in that: The reverse osmosis membrane (6) is internally composed of a plurality of identically arranged filtration structures, each filtration structure being composed of a membrane layer (10), a support layer (11), an interlayer (12) and a cushion layer (13); The membrane layer (10) is used to filter the raw water; The support layer (11) is used to support the membrane layer (10) to improve its mechanical strength and stability; The interlayer (12) is used to reduce the pressure loss when water passes through the membrane layer (10); The cushion layer (13) is used to form a channel between the interlayer (12) in a group of filter structures and the membrane layer (10) in an adjacent filter structure, and the channel is used for concentrated water to flow.

3. The reverse osmosis membrane filter element assembly for drinking water purification according to claim 2, characterized in that: The reverse osmosis membrane (6) further comprises a membrane antifouling layer (14) and a raw water guiding layer (15) located on the surface, wherein the membrane antifouling layer (14) is located outside the raw water guiding layer (15), the membrane antifouling layer (14) is used to reduce the accumulation of impurities on the membrane layer (10), and the raw water guiding layer (15) is used to allow raw water to pass through the membrane layer (10) evenly.

4. The reverse osmosis membrane filter element assembly for drinking water purification according to claim 3, characterized in that: The filtering structure, the membrane antifouling layer (14) and the raw water diversion layer (15) are all of irregular shapes.

5. The reverse osmosis membrane filter element assembly for drinking water purification according to claim 4, characterized in that: The edge of the reverse osmosis membrane (6) is bonded by glue.

6. The reverse osmosis membrane filter element assembly for drinking water purification according to claim 5, characterized in that: The water storage unit (2) is provided with a flow guide channel (18), and the flow guide channel (18) is located on one side of the storage area (9) for storing concentrated water.

7. The reverse osmosis membrane filter element assembly for drinking water purification according to claim 1, characterized in that: Each storage area (9) on the water storage unit (2) is connected to a first water pipe (19), wherein the first water pipe (19) on the storage area (9) for storing concentrated water is provided with a water valve (20); A sealing plate (5) on the rotating ring (3) is provided with a rotating drum (21) which is connected to the water purification space. A spiral blade (22) is provided inside the rotating drum (21). A supporting drum (23) is provided on the outer wall of the rotating drum (21). The rotating drum (21) can rotate on the supporting drum (23). The rotating drum (21) is connected to the supporting drum (23). A second water pipe (24) for connecting to an external water-using device or a faucet is provided on the supporting drum (23).

8. The reverse osmosis membrane filter element assembly for drinking water purification according to claim 7, characterized in that: A side pressure device for detecting a pressure difference is provided between the storage area (9) storing raw water and the support cylinder (23); The side pressure device comprises a movable sleeve (25) and two auxiliary pipes (26) which are slidably inserted into the movable sleeve (25) through the two ends of the movable sleeve (25), wherein one of the auxiliary pipes (26) is connected to the storage area (9), and the other auxiliary pipe (26) is connected to the support tube (23). A baffle (27) for blocking water is provided in the movable sleeve (25), and the baffle (27) is located between the two auxiliary pipes (26). The movable sleeve (25) and the auxiliary pipe (26) on the support tube (23) are connected via a spring (28) and a pressure gauge (29).

9. The reverse osmosis membrane filter element assembly for drinking water purification according to claim 8, characterized in that: The water storage unit (2) is composed of a first shell (30) and a second shell (31); the first shell (30) and the second shell (31) are interlocked and connected by bolts; the flow guide channel (18) and the first water pipe (19) are both arranged on the first shell (30); the first shell (30) and the second shell (31) together form two isolation areas (8) and two storage areas (9); and the second shell (31) is provided with a plurality of connection plates (32) for fixing the filter element.

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