CN108246103B - Lateral flow type reverse osmosis filter - Google Patents
Lateral flow type reverse osmosis filter Download PDFInfo
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- CN108246103B CN108246103B CN201611242200.3A CN201611242200A CN108246103B CN 108246103 B CN108246103 B CN 108246103B CN 201611242200 A CN201611242200 A CN 201611242200A CN 108246103 B CN108246103 B CN 108246103B
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- 238000001223 reverse osmosis Methods 0.000 title claims abstract description 103
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 259
- 239000012528 membrane Substances 0.000 claims abstract description 81
- 238000000746 purification Methods 0.000 claims abstract description 23
- 230000008676 import Effects 0.000 claims abstract description 7
- 239000008213 purified water Substances 0.000 claims description 21
- 238000004519 manufacturing process Methods 0.000 claims description 19
- 230000000694 effects Effects 0.000 abstract description 10
- 238000001914 filtration Methods 0.000 abstract description 8
- 238000005406 washing Methods 0.000 description 6
- 238000009792 diffusion process Methods 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 235000020188 drinking water Nutrition 0.000 description 2
- 239000003651 drinking water Substances 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- 241000700605 Viruses Species 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000035622 drinking Effects 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910017053 inorganic salt Inorganic materials 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 244000000010 microbial pathogen Species 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 239000000575 pesticide Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/02—Reverse osmosis; Hyperfiltration ; Nanofiltration
- B01D61/08—Apparatus therefor
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- Engineering & Computer Science (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Organic Chemistry (AREA)
- Nanotechnology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a lateral flow type reverse osmosis filter, which solves a series of problems that a membrane element cannot be completely utilized, the utilization area of the membrane element is unbalanced, the raw water introduction efficiency is low, the filtration speed is low, the filtration effect is not ideal and the like in the prior art. The technical scheme who solves this problem sets up water purification passageway and dense water passageway mainly including the center of filter, water purification passageway and dense water passageway communicate with water purification delivery port and dense water delivery port respectively, the membrane element twines and forms the reverse osmosis filter core outside water purification passageway and dense water passageway, form the system water runner that the heliciform extends to the center between the adjacent two-layer membrane element, the end that the membrane element is located on the lateral wall of reverse osmosis filter core has formed the raw water import with system water runner intercommunication, it holds the chamber to form the raw water between the outside of reverse osmosis filter core and the inboard of shell, the raw water import holds chamber and raw water inlet intercommunication through the raw water. The invention is mainly used for reverse osmosis water purification.
Description
Technical Field
The invention relates to a side-flow reverse osmosis filter, belonging to the technical field of water treatment.
Background
Water is an important part of human body, the water in human body accounts for about 50% of the weight of an adult, the average water consumption of normal people is 2000-. However, as water pollution is continuously increased, it is more and more difficult to drink healthy water, and other organs of the human body are damaged due to long-term pollution. Tap water for daily drinking can reach the national sanitary standard through various cleaning, sterilizing and disinfecting means and water quality detection after leaving factory, and then flows into thousands of households through a long pipeline and a secondary pressurized water tank. Before the water flows into a resident, long pipelines pass through complex terrains and roads, some pipelines are repaired every year, some water pipes are crossed with sewage pipes, and some water pipes in a building can reach a kitchen only by passing through a toilet. Because the leakage around the water pipe and the secondary pressurized water tank are rarely cleaned and disinfected, the water tank cannot be polluted once, and the rust in the water pipe and other reasons can cause secondary pollution to the water quality, pathogenic microorganisms and pesticides such as rust, lead and phenol appear in different degrees, and the pollution condition is dazzlingly surprised.
Along with the improvement of the requirements of people on the quality of drinking water, a water purification system gradually enters a drinking water system of every family. The purifier in the existing market generally adopts reverse osmosis filter, and reverse osmosis filter can filter impurities such as organic matter, colloid, bacterium, virus in raw water, especially has high filtration efficiency to impurities such as inorganic salt, heavy metal ion. Therefore, the reverse osmosis filter forms a core component of the water purifier, and the filtering effect of the water purifier is directly related to the filtering effect of the reverse osmosis filter. The structure of the reverse osmosis filter may be various, but a membrane element and a center tube are used in the reverse osmosis filter. In most existing products, only one central tube is adopted, the membrane element is wound on the central tube to form a reverse osmosis filter element, and when the reverse osmosis filter element is used for filtering, raw water enters from the surface, the side edge or the two sides of the reverse osmosis filter element and is collected into the central tube after being filtered. The reverse osmosis filter with the structure has a series of problems of low water inflow, short water making flow channel, unstable internal pressure, low desalination rate, incomplete utilization of membrane elements, unbalanced utilization area of the membrane elements, low filtration speed, unsatisfactory filtration effect and the like. In order to solve the problems, a cross-flow reverse osmosis filter is also proposed by optimizing the reverse osmosis filter, and the utilization rate of a membrane element is improved and the utilization area is more balanced by constructing an internal flow passage. The cross-flow reverse osmosis filter in the prior art adopts a central double-channel structure, the double channels are respectively used for introducing raw water and collecting purified water, the outer side of the reverse osmosis filter element is used for leading out concentrated water, but the water channel design also causes the problems of low raw water introduction efficiency, large internal water resistance, obvious pressure drop and the like.
Disclosure of Invention
In order to solve the problems, the invention provides a lateral flow type reverse osmosis filter which comprises a shell and membrane elements, wherein a raw water inlet, a purified water outlet and a concentrated water outlet are formed in the shell, and the lateral flow type reverse osmosis filter is characterized in that a purified water channel and a concentrated water channel are formed in the center of the filter and are respectively communicated with the purified water outlet and the concentrated water outlet, the membrane elements are wound on the purified water channel and the concentrated water channel to form a reverse osmosis filter element, a water production flow channel spirally extending towards the center is formed between every two adjacent layers of membrane elements, a raw water inlet communicated with the water production flow channel is formed at the tail end of each membrane element positioned on the side wall of the reverse osmosis filter element, a raw water accommodating cavity is formed between the outer side of the reverse osmosis filter element and the inner side of the shell, and.
Further, the longitudinal total length of the raw water inlet accounts for at least 70% of the height of the reverse osmosis filter element.
Furthermore, a supporting structure for supporting the tail end of the membrane element is arranged in the reverse osmosis filter.
Further, the support structure includes support rods at ends of the membrane elements.
Furthermore, the two ends of the reverse osmosis filter element are respectively provided with an upper end cover and a lower end cover, and the two ends of the support rod are respectively connected with the upper end cover and the lower end cover.
Furthermore, the outer edges of the upper end cover and the lower end cover are respectively provided with a clamping groove, and two ends of the supporting rod are respectively clamped in the clamping grooves; or the upper end cover and the lower end cover are fixed with the support rod through screws; or one of the upper end cover and the lower end cover is integrally formed with one end of the supporting rod, and the other end of the upper end cover and the lower end cover is fixed with the other end of the supporting rod; or the upper end cover and the lower end cover are respectively integrally formed with two ends of the supporting rod.
Furthermore, the upper end cover and the lower end cover at least cover three layers of membrane elements, and a water making flow channel is formed between two adjacent layers of membrane elements at the covering positions of the upper end cover and the lower end cover; or the upper end cover is provided with a water outlet channel communicated with the pure water channel and the concentrated water channel, and the tail end of the water outlet channel is respectively provided with a pure water outlet and a concentrated water outlet; or the upper end cover is provided with a through hole for the pure water channel and the concentrated water channel to pass through.
Furthermore, the support structure also comprises a support cylinder positioned outside the reverse osmosis filter element; alternatively, the support structure further comprises a plurality of support rings located outside the reverse osmosis filter element; or the gap between the support rod and the side wall of the reverse osmosis filter element is gradually reduced along the water inlet direction.
Furthermore, the center of the filter is provided with a first central pipe and a second central pipe which are separated from each other, and a pure water channel and a concentrated water channel are respectively formed inside the first central pipe and the second central pipe.
Furthermore, a third central tube and a fourth central tube nested in the third central tube are arranged in the center of the filter, a concentrated water channel is formed inside the fourth central tube, and a purified water channel is formed between the third central tube and the fourth central tube; or the center of the filter is provided with a third central tube and a fourth central tube nested in the third central tube, a pure water channel is formed inside the fourth central tube, and a concentrated water channel is formed between the third central tube and the fourth central tube.
In the present invention, since the curvature is smaller closer to the outer side and the resistance to the flow of water in the gap with the smaller curvature is smaller, the pressure drop of the water flow is smaller. Compared with the scheme that the raw water inlet is positioned in the center of the reverse osmosis filter element in the prior art, the scheme of the invention can enable the membrane element with a larger area to be efficiently utilized under the condition of the same original water pressure. And because the water production efficiency is high, the section flow velocity of the raw water on the surface of the membrane element is obviously improved, and the risk of surface scaling is reduced. On the other hand, the raw water containing cavity stores raw water with a certain volume, and can buffer high-pressure water flow entering from the raw water inlet to a certain degree, so that the water pressure at the raw water inlet is uniform and stable. Importantly, under the non-water production condition, in the scheme of the prior art that the raw water inlet is positioned at the center of the reverse osmosis filter element, when water production is just finished, the raw water is only filled in the central pipe positioned at the center of the reverse osmosis filter element, and the space between the reverse osmosis filter element and the shell is filled with the concentrated water, so that the membrane element is soaked in the concentrated water with high TDS within a certain time, even if after a certain time, due to the diffusion effect, the TDS of the concentrated water and the raw water tend to be consistent, and due to the small volume of the raw water and the large volume of the concentrated water, the TDS of the neutralized water is still high, the thickness of a salt layer attached to the surface of the membrane element can be increased, the washing times and the washing time need to be increased, and even the subsequent purification efficiency and the service life of the membrane can be adversely affected, compared with the scheme of the present invention, when water production is finished, the reverse osmosis filter element is soaked in the raw water with low TD, in addition, only a small amount of concentrated water is positioned at the rear end of the water making channel, most of the concentrated water enters the concentrated water channel, and after a certain time, the TDS of the neutralized water is still low even under the diffusion effect, so that the reverse osmosis membrane filter element washing frequency and time are reduced, the purification efficiency is improved, and the service life of the membrane is prolonged.
Drawings
The invention is described in further detail below with reference to the following figures and detailed description:
FIG. 1 is a schematic longitudinal cross-sectional view of a side-flow reverse osmosis filter of the present invention;
FIG. 2 is an expanded schematic view of a reverse osmosis cartridge of the present invention;
FIG. 3 is a schematic view of a reverse osmosis cartridge of the present invention;
FIG. 4 is a schematic cross-sectional view of a reverse osmosis cartridge of the present invention;
FIG. 5 is a schematic view of a second embodiment of the support structure of the present invention;
FIG. 6 is a schematic view of a third embodiment of the support structure of the present invention;
FIG. 7 is a schematic longitudinal cross-sectional view of another embodiment of a side-flow reverse osmosis filter of the present invention.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1 to 4, a side-flow reverse osmosis filter includes a housing 1 and a membrane element 21, wherein the membrane element 21 is a closed bag-shaped structure formed by oppositely bonding two reverse osmosis membranes or a closed bag-shaped structure formed by bonding a single reverse osmosis membrane folded in half, a desalination layer of the reverse osmosis membrane is generally located on an outer surface of the bag-shaped membrane element 21, raw water enters the bag-shaped membrane element 21 through the reverse osmosis membrane and flows along an inner purified water flow passage 211, and in order to improve flow efficiency, a separation net is provided in the bag-shaped membrane element 21 to widen a gap width of the purified water flow passage 211. Be equipped with raw water inlet 11 on the shell 1, water purification delivery port 12 and dense water delivery port 13, the center of filter is equipped with water purification passageway 31 and dense water passageway 32, water purification passageway 31 and dense water passageway 32 communicate with water purification delivery port 12 and dense water delivery port 13 respectively, membrane element 21 twines and forms reverse osmosis filter core 2 outside water purification passageway 31 and dense water passageway 32, form the system water runner 4 that the heliciform extends to the center between the adjacent two-layer membrane element 21, membrane element 21 is located the terminal raw water import 41 that has formed the intercommunication with system water runner 4 on the lateral wall of reverse osmosis filter core 2, it holds chamber 5 to form the raw water between the outside of reverse osmosis filter core 2 and the inboard of shell 1, raw water import 41 holds chamber 5 and communicates with raw water inlet 11 through the raw water. The raw water inlet 41 is a strip-shaped and longitudinally extending, but may be a raw water inlet having other irregular shapes, such as a spiral shape extending along the sidewall of the reverse osmosis filter element, a wave shape extending, etc., or may be a raw water inlet having a plurality of sections, i.e., a portion at the end of each membrane element is bonded and fixed to an adjacent membrane element inside, so that the raw water inlet is divided into a plurality of sections by the bonded and fixed portion.
The side-flow reverse osmosis filter comprises a shell and membrane elements, wherein a raw water inlet, a purified water outlet and a concentrated water outlet are formed in the shell, raw water enters a water production flow channel between two adjacent membrane elements from a raw water inlet on the side wall of a reverse osmosis filter element under a water production working condition, purified water is formed in the raw water passing part of the membrane elements and is collected to a purified water channel at the rear end of the purified water flow channel along the purified water flow channel in the membrane elements, and simultaneously concentrated water is formed at the rear end of the water production flow channel and is collected by a concentrated water channel at the rear end of the water production flow channel. In combination with the above-described structure, after entering the reverse osmosis filter from the raw water inlet 11, the raw water is collected in the raw water accommodating chamber 5 and enters the water production flow channel 4 from the raw water inlet 41, on one hand, the raw water passes through the membrane element 21 to form purified water and is collected along the purified water flow channel 211 inside the membrane element 21 to the purified water channel 31 located at the rear end of the purified water flow channel 211, and on the other hand, the raw water in the water production flow channel 4 forms concentrated water at the rear end of the water production flow channel 4 and is collected by the concentrated water channel 32 located at the rear end of the water production flow channel 4. The pressure drop of the water flow is smaller since the closer to the outside the curvature is, the smaller the resistance to the flow of water in the gap with the smaller curvature is. Compared with the scheme that the raw water inlet is positioned at the center of the reverse osmosis filter element in the prior art, the scheme of the invention can enable the membrane element 21 with a larger area to be efficiently utilized under the condition of the same original water pressure. Because the water production efficiency is high, the section flow velocity of the raw water on the surface of the membrane element 21 is obviously improved, and the risk of surface scaling is reduced. In order to ensure efficient introduction of the raw water, it is preferable that the total length of the raw water inlet 41 in the longitudinal direction is at least 70% of the height of the reverse osmosis filter element 2, where the longitudinal direction is parallel to the axial direction of the reverse osmosis filter element 2, if the raw water inlet is a single inlet, the parameter refers to the length in the direction, and if the raw water inlet is a plurality of sections, the parameter refers to the sum of the lengths of the sections in the direction. When the ratio of the longitudinal total length of the raw water inlet to the height of the reverse osmosis filter element is less than 70%, the raw water needs to flow to the part dislocated with the raw water inlet when entering the raw water inlet, which is equivalent to increase the water resistance for the raw water, and influences the effective utilization area of the membrane element.
In addition, the raw water accommodating cavity 5 stores a certain volume of raw water, and can buffer high-pressure water flow entering from the raw water inlet 11 to a certain extent, so that the water pressure at the raw water inlet 41 is uniform and stable. Importantly, in the non-water production situation, in the prior art scheme that the raw water inlet is positioned in the center of the reverse osmosis filter element, when water production is just finished, the raw water is only filled in the central pipe positioned in the center of the reverse osmosis filter element, and the space between the reverse osmosis filter element and the shell is filled with the concentrated water, so that the membrane element is soaked in the concentrated water with high TDS within a certain time, even if after a certain time, due to the diffusion effect, the TDS of the concentrated water and the raw water tend to be consistent, and due to the fact that the volume of the raw water is small and the volume of the concentrated water is large, the TDS of the neutralized water is still high, for the membrane element, the thickness of a salt layer attached to the surface of the membrane element is increased, the washing times and the washing time are increased, and even the subsequent purification efficiency and the service life of the membrane are possibly affected adversely, in contrast, when water production is finished, the reverse osmosis filter element 2 is soaked in the raw water with low TDS, in addition, only a small amount of concentrated water is positioned at the rear end of the water making channel 4, most of the concentrated water enters the concentrated water channel 32, and after a certain time, the TDS of the neutralized water is still low even under the diffusion effect, so that the washing times and time of the reverse osmosis filter element 2 are reduced, the purification efficiency is improved, and the service life of the membrane is prolonged.
It should be noted that the raw water inlet 11 in this embodiment is a single water inlet, and a plurality of water inlets may be provided on the housing to improve the efficiency and uniformity of the raw water introduction, for example, the raw water inlets are provided at the upper and lower ends of the housing, respectively.
Because the skin of reverse osmosis filter core is located the great front end of raw water pressure, forms great effort of outside expansion to the end of membrane element, if do not adopt bearing structure to fix a position, under the long-term use, reverse osmosis filter core has the risk of expansion, influences the waterway structure in the filter, even under some extreme circumstances, can lead to the fact the destruction and lead to the water purification runner and raw water to hold the chamber intercommunication to the end of membrane element. In order to avoid the above problem, the reverse osmosis filter is provided with a support structure for supporting the end of the membrane element 21, and specifically, the support structure comprises a support rod 6, and the support rod 6 is located at the end of the membrane element 21. The support rod 6 and the tail end of the membrane element 21 are integrally formed by injection molding, or a clamping part for clamping the tail end of the membrane element is arranged on the support rod. The bracing piece 6 has played the location support effect to the end of membrane element 21, still plays the guide effect to raw water entering system water passageway 4 in addition, is convenient for control raw water import 41's size, reduces the water resistance of this department, promotes the leading-in efficiency of raw water to can also regard as the location benchmark when reverse osmosis filter core 2 installs. Preferably, the gap between the support rod 6 and the side wall of the reverse osmosis filter element 2 is gradually reduced along the water inlet direction, so that the raw water is better guided. In the present embodiment, the raw water inlet 41 is longitudinally extended, and correspondingly, the support rod 6 is long, and if the raw water inlet adopts the above-mentioned other special-shaped structure, the support rod 6 also needs to adopt a shape corresponding to the shape. The supporting rod covers the whole raw water inlet, of course, the supporting rod can only cover part of the raw water inlet, and in addition, the supporting rod can also be in a multi-section type, for example, an upper section and a lower section are adopted and are respectively fixed, and a gap can be left between the two sections and can also be mutually abutted.
In this embodiment, two ends of the support rod 6 are respectively connected to the upper end cap 71 and the lower end cap 72 at two ends of the reverse osmosis filter element 2. The specific connection mode between the support rod and the upper end cover and the lower end cover is as follows: the outer edges of the upper end cover 71 and the lower end cover 72 are respectively provided with a clamping groove, two ends of the support rod 6 are respectively clamped in the clamping grooves, wherein the outer edges of the upper end cover 71 and the lower end cover 72 are provided with flanges extending towards the reverse osmosis filter element 2, and the clamping grooves are positioned on the inner side or the outer side of the flanges; or the upper end cover and the lower end cover are not provided with the flanges, the end surfaces of the outer edges of the upper end cover and the lower end cover, which face to one side of the reverse osmosis filter element, are in the same plane with the central area of the reverse osmosis filter element, and clamping grooves for clamping and fixing the supporting rods are arranged on the outer edges of the upper end cover and the lower end cover; or the upper end cover and the lower end cover can be fixed with the support rod through screws; or one of the upper end cover and the lower end cover is integrally formed with one end of the supporting rod, and the other end of the upper end cover and the lower end cover is fixed with the other end of the supporting rod; or the upper end cover and the lower end cover are respectively integrally formed with the two ends of the support rod. In addition to the above-mentioned mounting manner of the support rod, the support rod may also be fixed by the housing, for example, the inner side of the bottom and/or top of the housing is provided with a fixing hole for inserting the end of the support rod, or the inner side of the sidewall of the housing is provided with a slot for inserting the support rod along the direction parallel to the axial direction of the reverse osmosis filter element. In addition, the support rod can be fixed by a central tube located at the center of the filter, for example, the upper end and the lower end of the central tube are respectively provided with a fixing part extending outwards in the radial direction, and the fixing parts are clamped and fixed with the support rod or fixed by screws. It is worth mentioning that on the premise of having the upper end cover and the lower end cover, the supporting structure can also be a tensioning mechanism positioned on the upper end cover and the lower end cover, the tensioning mechanism is fixed with the upper end and the lower end of the tail end of the membrane element, and can be clamped and fixed or integrally formed, and after the upper end cover and the lower end cover are installed in place, the tensioning mechanism can support and position the tail end of the membrane element, so that the tail end of the membrane element is prevented from expanding outwards.
The upper end cover 71 and the lower end cover 72 cover at least three layers of membrane elements 21, and a water making flow passage 4 is formed between two adjacent layers of membrane elements 21 where the upper end cover 71 and the lower end cover 72 cover. Because the inlet of the water making flow passage 4 is the raw water inlet 41, and the outlet is the communication part of the rear end and the concentrated water passage 32, the upper end and the lower end of the water making flow passage 4 need to be sealed to drive the raw water to flow in the water making flow passage 4. In the scheme that the membrane element is not sealed by the upper end cover and the lower end cover, even the upper end cover and the lower end cover are not arranged, after the membrane element is rolled to form the reverse osmosis filter element, glue is applied to the upper end and the lower end of the reverse osmosis filter element for sealing. In addition, the upper end cover 71 is provided with an extension wall 711 extending toward the filter outlet, and a purified water outlet or a concentrated water outlet is formed between the extension wall 711 and the upwardly extending channel side wall of the purified water channel or the concentrated water channel. As another embodiment, a water outlet channel communicated with the pure water channel and the concentrated water channel can be arranged on the upper end cover, and a pure water outlet and a concentrated water outlet are respectively formed at the tail ends of the water outlet channel; or the upper end cover is provided with a through hole for the pure water channel and the concentrated water channel to pass through.
In this embodiment, the filter is provided at the center with a first center tube 33 and a second center tube 34 spaced apart from each other, and the inside of the first center tube 33 and the second center tube 34 form a clear water passage 31 and a concentrated water passage 32, respectively. Through holes are respectively arranged on the side walls of the first central pipe 33 and the second central pipe 34 and are respectively communicated with the water purifying flow passage 211 and the water preparing flow passage 4. It should be noted that, in the specific membrane rolling process, before the reverse osmosis membrane forms the bag-shaped membrane element 21, the first central tube 33 is wrapped inside, the second central tube 34 is placed on one side of the first central tube, and then the membrane element 21 is wound around the first central tube 33 and the second central tube 34, so as to form the columnar reverse osmosis filter element 2. Preferably, the first central tube 33 and the second central tube 34 have semicircular cross-sectional outer contours respectively, and the two are spliced to form a complete circle for facilitating film rolling.
As another embodiment of the supporting structure, as shown in fig. 5, the supporting structure includes a supporting rod 6a and a supporting cylinder 61a, the supporting cylinder 61a covers the outside of the reverse osmosis filter element, the supporting rod 6a and the supporting cylinder 61a are integrally formed by injection molding or are fixed on the supporting cylinder 61a by insertion, and the supporting cylinder 61a is provided with a through groove for raw water to enter at the position of the supporting rod 6 a. In order to better guide the flow of the raw water, the support rod 6a is tilted relative to the arc surface where the support cylinder 61a is located. The support structure of the embodiment has good coating support for the outer layer of the membrane element, and the trend of the whole outward expansion of the reverse osmosis filter element is restrained. As shown in fig. 6, the support structure may also be a support bar 6b and a plurality of support rings 62b, the support rings 62b are located outside the reverse osmosis filter element, and the support bar 6b and the support rings 62b are integrally formed by injection molding or are fixed on the support rings 62b by insertion. Likewise, the support structure can inhibit the tendency of the reverse osmosis filter element to expand integrally. In addition, tie rods may also be provided between adjacent support rings 62b to improve strength. Of course, the supporting structure can also be provided with only the supporting cylinder or the supporting ring instead of the supporting rod, so that the structure is simplified and the cost is reduced.
As another example of the water purification passage and the concentrated water passage at the center, as shown in fig. 7, the center of the filter is provided with a third center tube 35c and a fourth center tube 36c nested in the third center tube 35c, the inside of the fourth center tube 36c forms the concentrated water passage 32c, and the water purification passage 31c is formed between the third center tube 35c and the fourth center tube 36 c. Wherein, the side wall of the third central tube 35c is provided with a through hole for passing the purified water, and the upper and lower ends of the reverse osmosis filter element 2c are partially non-closed in the area near the center, which can allow the concentrated water at the rear end of the membrane element to flow out from the water making flow channel and be collected by the concentrated water channel 32c in the fourth central tube 36 c. It can be understood that the positions of the pure water channel and the concentrated water channel can be changed, specifically, the center of the filter is provided with a third central tube and a fourth central tube nested in the third central tube, the pure water channel is formed inside the fourth central tube, and the concentrated water channel is formed between the third central tube and the fourth central tube. Other structures of this embodiment can be referred to the above embodiments, and are not described herein again.
It should be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the scope of the invention, which is defined by the appended claims.
Claims (10)
1. The utility model provides a lateral flow formula reverse osmosis filter, includes shell and membrane element, be equipped with raw water inlet, water purification delivery port and dense water delivery port on the shell, its characterized in that, the center of filter is equipped with water purification passageway and dense water passageway, water purification passageway and dense water passageway communicate with water purification delivery port and dense water delivery port respectively, the membrane element twines to become the reverse osmosis filter core in water purification passageway and dense water passageway appearance, forms the system water runner that the heliciform extends to the center between the adjacent two-layer membrane element, the end that the membrane element is located on the lateral wall of reverse osmosis filter core has formed the raw water import with system water runner intercommunication, it holds the chamber to form the raw water between the outside of reverse osmosis filter core and the inboard of shell, the raw water import holds chamber and raw water.
2. The side-flow reverse osmosis filter of claim 1, wherein the total longitudinal length of the raw water inlet is at least 70% of the height of the reverse osmosis cartridge.
3. The side-flow reverse osmosis filter of claim 1, wherein a support structure is provided within the reverse osmosis filter to support an end of the membrane element.
4. The side-flow reverse osmosis filter of claim 3, wherein the support structure comprises support rods at the ends of the membrane elements.
5. The lateral flow reverse osmosis filter of claim 4, wherein the reverse osmosis filter element is provided with an upper end cover and a lower end cover at two ends respectively, and the two ends of the support rod are connected with the upper end cover and the lower end cover respectively.
6. The lateral flow type reverse osmosis filter of claim 5, wherein the outer edges of the upper end cover and the lower end cover are respectively provided with a clamping groove, and two ends of the support rod are respectively clamped in the clamping grooves; or the upper end cover and the lower end cover are fixed with the support rod through screws; or one of the upper end cover and the lower end cover is integrally formed with one end of the supporting rod, and the other end of the upper end cover and the lower end cover is fixed with the other end of the supporting rod; or the upper end cover and the lower end cover are respectively integrally formed with two ends of the supporting rod.
7. The side-flow reverse osmosis filter of claim 5, wherein the upper end cover and the lower end cover at least three layers of membrane elements, and a water production flow channel is formed between two adjacent layers of membrane elements where the upper end cover and the lower end cover; or the upper end cover is provided with a water outlet channel communicated with the pure water channel and the concentrated water channel, and the tail end of the water outlet channel is respectively provided with a pure water outlet and a concentrated water outlet; or the upper end cover is provided with a through hole for the pure water channel and the concentrated water channel to pass through.
8. The side-flow reverse osmosis filter of claim 4, wherein the support structure further comprises a support cartridge located outside the reverse osmosis cartridge; alternatively, the support structure further comprises a plurality of support rings located outside the reverse osmosis filter element; or the gap between the support rod and the side wall of the reverse osmosis filter element is gradually reduced along the water inlet direction.
9. The side-flow reverse osmosis filter of claim 1, wherein the filter has a first central tube and a second central tube spaced apart from each other at the center thereof, and the first central tube and the second central tube have respective clean water passages and concentrated water passages formed therein.
10. The side-flow reverse osmosis filter of claim 1, wherein the filter is provided with a third central pipe and a fourth central pipe nested in the third central pipe, the inside of the fourth central pipe forms a concentrated water channel, and a purified water channel is formed between the third central pipe and the fourth central pipe; or the center of the filter is provided with a third central tube and a fourth central tube nested in the third central tube, a pure water channel is formed inside the fourth central tube, and a concentrated water channel is formed between the third central tube and the fourth central tube.
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| CN201611242200.3A CN108246103B (en) | 2016-12-29 | 2016-12-29 | Lateral flow type reverse osmosis filter |
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| CN201611242200.3A CN108246103B (en) | 2016-12-29 | 2016-12-29 | Lateral flow type reverse osmosis filter |
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| CN108246103B true CN108246103B (en) | 2020-12-25 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109987678A (en) * | 2019-03-13 | 2019-07-09 | 佛山市云米电器科技有限公司 | A kind of integrated flushing type filter core and the filtration system with the filter core |
| CN111186921B (en) * | 2019-06-25 | 2021-04-09 | 九阳股份有限公司 | Self-flushing type multi-stage filtering filter element assembly |
| CN113491950B (en) * | 2020-03-21 | 2022-12-30 | 佛山市美的清湖净水设备有限公司 | Reverse osmosis membrane element, filter element and water purifier |
| CN112125428A (en) * | 2020-10-19 | 2020-12-25 | 珠海格力电器股份有限公司 | Composite filter element and water purifier |
| CN114307657B (en) * | 2021-10-29 | 2023-06-30 | 浙江沁园水处理科技有限公司 | Film rolling structure with anti-pollution capability and filter element assembly |
| CN114011246B (en) * | 2021-10-29 | 2024-04-02 | 浙江沁园水处理科技有限公司 | Sidestream membrane filter element assembly |
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