A reverse osmosis type composite filter element and water purifier

Abstract

The application discloses a reverse osmosis type composite filter element and a water purifier. The reverse osmosis type composite filter element comprises a filter element wall, the filter element wall is a hollow tubular structure, the filter element wall is in a curled state in an initial state and can automatically stretch to adapt to water flow in a water flow state, the filter element wall is internally provided with a pre-filter cavity, a reverse osmosis filter cavity and a post-filter cavity which are respectively filled with pre-filter material, post-filter material and a reverse osmosis membrane, the reverse osmosis membrane divides the reverse osmosis cavity into a concentrated water area and a purified water area, the pre-filter cavity is communicated with the concentrated water area of the reverse osmosis cavity, a concentrated water pipeline and a purified water pipeline are arranged in the post-filter cavity, the concentrated water pipeline is communicated with the concentrated water area, the purified water pipeline is communicated with the purified water area, the pre-filter material, the reverse osmosis filter material and the post-filter material are integrated on the filter element to form the composite filter element and improve water quality, the filter element wall also stretches and curls when water pressure dynamically changes, the filtering surface area is increased, the self-pressure increasing and self-cleaning functions of water pressure are realized, and a pressure increasing device and a backwashing water pipeline do not need to be additionally arranged.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water purification equipment, in particular to a reverse osmosis type composite filter element and a water purifier. BACKGROUND

[0002] In the field of kitchen appliances, a water purifier is one of the indispensable devices in a family. The water purifiers on the current market mainly adopt a multi-stage filter element mode in multiple filter element cartridges to purify water quality, resulting in a large volume of the entire water purifier, which occupies a large cabinet space of the user. The existing water purifier needs to additionally configure a booster pump to pressurize the water pressure when there is a reverse osmosis filter element. Due to long-term use, the filter element of the water purifier is scaled, which affects normal use, and therefore needs to be cleaned. The existing water purifier often adopts a backflushing water path for flushing, resulting in the need for an additional backflushing water path. There is also a filter element that is taken out for flushing without a backflushing water path, but the operation is inconvenient, which brings inconvenience to the user. SUMMARY

[0003] The present application provides a reverse osmosis type composite filter element and a water purifier to overcome the defects of the prior art that multiple filter element cartridges result in a large volume of the water purifier, the need for a booster pump to pressurize, or the need for an additional backflushing water path.

[0004] The present application solves the above technical problems by the following technical solutions:

[0005] The present application provides a reverse osmosis type composite filter element, comprising: a filter element wall, which is a hollow tubular structure, and is in a curled state in an initial state and can automatically stretch to adapt to water flow in a water flow state; a pre-filter cavity, a reverse osmosis filter cavity, and a post-filter cavity are formed in the filter element wall, the pre-filter cavity is filled with pre-filter material; the post-filter cavity is filled with post-filter material, the reverse osmosis filter cavity is filled with a reverse osmosis membrane and is divided into a concentrated water area and a purified water area, the pre-filter cavity is in communication with the concentrated water area of the reverse osmosis filter cavity, a concentrated water pipeline and a purified water pipeline are arranged in the post-filter cavity, the concentrated water pipeline is in communication with the concentrated water area, and the purified water pipeline is in communication with the purified water area.

[0006] In the scheme, the filter core wall is arranged in a crimped state in the initial state and can automatically stretch to adapt to the water flow in the state of water flow, that is, the filter core wall also dynamically stretches and crimps when the water pressure dynamically changes, thereby increasing the filtering surface area and improving the filtering efficiency; moreover, the water pressure is autonomously pressurized without additional pressurization; the automatic stretching and crimping actions of the filter core wall also help to remove impurities attached to the surface of the filter core, thereby reducing the cleaning frequency of the filter core and prolonging the service life of the filter core; the filter core wall is formed with a pre-filter cavity, a reverse osmosis filter cavity and a post-filter cavity, which are respectively filled with pre-filter material, reverse osmosis membrane and post-filter material, so that the pre-filter material, reverse osmosis filter material and post-filter material are integrated on one filter core, thereby forming a composite filter core, which can improve the water quality while saving space; the concentrated water pipeline is in communication with the concentrated water area; and the clean water pipeline is in communication with the clean water area, so as to ensure the separation of the concentrated water and the clean water and avoid cross contamination therebetween, thereby further improving the purity of the water quality.

[0007] Preferably, the filter core wall is made of a shape memory material.

[0008] In the scheme, the filter core wall is made of a shape memory material, and the stretching and crimping of the filter core wall under the action of water flow are realized by the shape memory material. Generally, a shape memory material with corresponding shape memory parameters is selected according to the rated water inlet pressure and the water production pressure.

[0009] Preferably, the two ends of the filter core wall are respectively a water inlet end and a water outlet end, and the water outlet end is provided with a concentrated water outlet and a clean water outlet; and / or, the pre-filter cavity, the reverse osmosis filter cavity and the post-filter cavity are arranged in sequence along the direction from the water inlet end to the water outlet end.

[0010] In the scheme, the water inlet end and the water outlet end are respectively distributed at the two ends of the filter core wall, raw water enters the filter core wall through the water inlet end and is filtered, and then the concentrated water and the clean water are discharged from the concentrated water outlet and the clean water outlet provided at the water outlet end, so as to avoid cross contamination; the pre-filter cavity, the reverse osmosis filter cavity and the post-filter cavity are arranged in sequence along the direction from the water inlet end to the water outlet end, that is, the raw water is preliminarily filtered in the pre-filter cavity and then enters the reverse osmosis filter cavity for filtering, so as to reduce the burden of the reverse osmosis filter core, and finally the water quality is further improved in the post-filter cavity, thereby improving the taste of the clean water.

[0011] Preferably, the pore size of the filter core wall gradually decreases from the water inlet end to the water outlet end.

[0012] In the scheme, the pore size of the filter core wall gradually decreases from the water inlet end to the water outlet end, which on the one hand facilitates the crimping of the filter core wall to reduce the volume of the filter core, and on the other hand facilitates the increase of the pressure to increase the filtering efficiency.

[0013] Preferably, the reverse osmosis filter cavity is further provided with a center tube, the center tube is closed towards one end of the pre-filter cavity, and the reverse osmosis membrane is wound outside the center tube, so that the center tube is located in the purified water area, and the water passing through the reverse osmosis membrane is collected in the center tube, and the center tube is made of flexible material.

[0014] In this scheme, a center tube is further provided in the reverse osmosis filter cavity for collecting water passing through the reverse osmosis membrane, the center tube is closed towards one end of the pre-filter cavity, thereby avoiding the water in the pre-filter cavity directly entering the purified water area to cause cross contamination; and the center tube is made of flexible material so that it can stretch and contract with the filter wall.

[0015] Preferably, the cross section of the pre-filter cavity is annular or circular, and the water inlet is arranged on the water inlet end corresponding to the area where the pre-filter cavity is located.

[0016] In this scheme, the water inlet is arranged on the water inlet end corresponding to the area where the pre-filter cavity is located, so as to ensure that the water flow can directly enter the pre-filter cavity for preliminary filtration; the cross section of the pre-filter cavity is annular, and the pre-filter material is arranged only in the annular area, thereby saving raw materials and ensuring uniform water flow in the annular area; and the cross section of the pre-filter cavity is circular, and the pre-filter material is arranged in the entire circular area, thereby improving the water quantity subjected to preliminary filtration.

[0017] Preferably, the pre-filter cavity is divided into a plurality of sub-cavities along the water flow direction, the plurality of sub-cavities are connected, and the pre-filter material is arranged in the plurality of sub-cavities in multiple stages.

[0018] In this scheme, the pre-filter cavity is provided with multiple stages of pre-filter material along the water flow direction, so as to perform multiple-stage filtration, further improve the water quality subjected to the pre-filter cavity, and reduce the burden of the reverse osmosis filter cavity.

[0019] Preferably, the pre-filter material is selected from one or more of PP cotton, activated carbon, and ceramic.

[0020] In this scheme, the pre-filter material can effectively remove large-particle impurities, peculiar smell, residual chlorine, and small particles in water, improve the purity and taste of the water, and reduce the maintenance cost.

[0021] Preferably, the post-filter material is arranged in the purified water pipeline; and / or the post-filter material is selected from one or more of activated carbon, ultrafiltration membrane, and membrane chromatography.

[0022] In this scheme, the activated carbon can reduce the pollution of the ultrafiltration membrane, prolong the service life of the ultrafiltration membrane, and reduce the maintenance cost; and the ultrafiltration membrane and the membrane chromatography can effectively remove microorganisms and specific pollutants in water, ensure that the microbial indicators of the effluent meet the drinking water standards, and improve the purity and taste of the water.

[0023] The application also provides a water purifier, which comprises the reverse osmosis type composite filter element, so that the volume of the water purifier is reduced, the space occupied by the water purifier in the user's cabinet is reduced, the quality of the water output by the water purifier is improved, and the requirement of the water purifier for the placement space is reduced.

[0024] The positive progress effect of the application is that the filter element wall of the reverse osmosis type composite filter element is arranged in a curled state in an initial state, can automatically stretch under the water flow in a water flow state, and is formed with a pre-filter cavity, a reverse osmosis filter cavity and a post-filter cavity, so that the pre-filter material, the reverse osmosis filter material and the post-filter material are integrated on one filter element, thereby forming the reverse osmosis type composite filter element; the filter element wall also dynamically stretches and curls when the water pressure dynamically changes, the filtering surface area is increased, the self-cleaning function is realized, the additional booster arrangement and backwashing waterway are not required, the cost is reduced, and the water quality is improved and the structure is simplified. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a structural schematic view of a reverse osmosis type composite filter element in an initial state according to an embodiment of the application.

[0026] Figure 2 FIG. 2 is a schematic view of the reverse osmosis type composite filter element in the initial state in a first direction (I).

[0027] Figure 3 FIG. 3 is a schematic view of the reverse osmosis type composite filter element in the initial state in a first direction (II).

[0028] Figure 4 FIG. 4 is an internal sectional view of the reverse osmosis type composite filter element in the initial state (I).

[0029] Figure 5 FIG. 5 is a structural schematic view of the reverse osmosis type composite filter element in a stretched limit state.

[0030] Figure 6 FIG. 6 is an internal sectional view of the reverse osmosis type composite filter element. Figure 5

[0031] Figure 7 FIG. 7 is a schematic view of the reverse osmosis type composite filter element in a water outlet end direction. Figure 5

[0032] Figure 8 FIG. 8 is an internal sectional view of the reverse osmosis type composite filter element in the initial state (II).

[0033] Figure 9 FIG. 9 is an internal sectional view of the reverse osmosis type composite filter element in the initial state (III).

[0034] REFERENCE SIGNS​​

[0035] reverse osmosis type composite filter element 1

[0036] filter element wall 2

[0037] pre-filter chamber 3

[0038] reverse osmosis filter chamber 4

[0039] post-filter chamber 5

[0040] reverse osmosis membrane 6

[0041] concentrated water zone 7

[0042] purified water zone 8

[0043] concentrated water line 9

[0044] purified water line 10

[0045] water inlet end 11

[0046] water outlet end 12

[0047] central tube 13

[0048] water outlet tube 14

[0049] chamber 15 DETAILED DESCRIPTION

[0050] The present application will be further described by way of example but without intending to limit the application to the examples described.

[0051] The siphuncular mouthparts are characteristic of the Lepidoptera and are adapted for sucking up liquid food such as nectar and fruit juice. The outer mandibular lobe is elongated and forms a proboscis which can be curled and is elastic. The outer mandibular lobe is crescent-shaped in cross-section and is filled with blood. The trachea, nerves and short muscles which run obliquely along the wall of the outer mandibular lobe are contained in the lobe. The two outer mandibular lobes join together at the dorsal-ventral surface to form a proboscis which forms a food channel. The proboscis cavity is sealed except for the hole at the end and the opening at the base of the mouth. The proboscis can only slide longitudinally. The sucking mechanism is the food sinus-pharyngeal pump. The mouth is located at the base of the proboscis. Normally, the proboscis is curled between the two lower labial palps. When feeding, the proboscis extension muscle contracts, forcing some blood to flow into the outer mandibular lobe cavity. The proboscis is thus extended and liquid food is sucked into the food channel through the opening of the proboscis and then into the mouth. When the proboscis extension muscle relaxes, the outer mandibular lobe retraction muscle contracts and blood flows back from the outer mandibular lobe. The proboscis is curled. The present application imitates the siphuncular mouthparts. By imitating the structure of the siphuncular mouthparts of insects and combining the principles of biology and engineering, a reverse osmosis type composite filter element 1 is provided, as shown in Figures 1-7As shown, the reverse osmosis type composite filter element 1 comprises: a filter element wall 2, which is a hollow tubular structure, and can automatically stretch under water flow in a water flow state from a curled state in an initial state; a pre-filter cavity 3, a reverse osmosis filter cavity 4 and a post-filter cavity 5 are formed in the filter element wall 2, the pre-filter cavity 3 is filled with pre-filter material; the post-filter cavity 5 is filled with post-filter material, and the reverse osmosis filter cavity is filled with a reverse osmosis membrane 6 and is divided into a concentrated water area 7 and a purified water area 8, the pre-filter cavity 3 is communicated with the concentrated water area 7 of the reverse osmosis filter cavity, and the post-filter cavity 5 is provided with a concentrated water pipeline 9 and a purified water pipeline 10, the concentrated water pipeline 9 is communicated with the concentrated water area 7; and the purified water pipeline 10 is communicated with the purified water area 8.

[0052] The reverse osmosis type composite filter element 1 simulates the structure of the siphon type mouth and the dynamic change in the feeding process, and the filter element wall 2 of the reverse osmosis type composite filter element 1 is set to a curled state in an initial state and can automatically stretch under water flow in a water flow state, that is, the filter element wall 2 also dynamically stretches and curls when the water pressure dynamically changes, thereby increasing the filtering surface area and improving the filtering efficiency; moreover, the water pressure is automatically pressurized without additional pressurization; the automatic stretching and curling action of the filter element wall 2 also helps to remove impurities attached to the surface of the filter element, reduces the cleaning frequency of the filter element, and prolongs the service life of the filter element; the pre-filter cavity 3, the reverse osmosis filter cavity 4 and the post-filter cavity 5 are formed in the filter element wall 2, and are respectively filled with pre-filter material, a reverse osmosis membrane 6 and post-filter material, so that the pre-filter, the reverse osmosis and the post-filter are integrated on one filter element, thereby forming the reverse osmosis type composite filter element 1, which can improve water quality while saving space; the concentrated water pipeline 9 is communicated with the concentrated water area 7; and the purified water pipeline 10 is communicated with the purified water area 8, which ensures the separation of concentrated water and purified water and avoids cross contamination between them, thereby further improving the purity of the water quality, wherein the initial state refers to a state without water pressure and without water, and the water flow state refers to a state with water pressure and with water.

[0053] The beak of the siphon type mouth is curled and stretched by its muscles, the filter element wall 2 of the present application is made of shape memory material, and the filter element wall 2 is stretched and curled under the action of water flow by the shape memory material, and the shape memory material with corresponding shape memory parameters is usually selected according to the rated water inlet pressure and the water making pressure.

[0054] The beak of the siphon type mouth is curled and stretched by its muscles, the filter element wall 2 of the present application is made of shape memory material, and the filter element wall 2 is stretched and curled under the action of water flow by the shape memory material, and the shape memory material with corresponding shape memory parameters is usually selected according to the rated water inlet pressure and the water making pressure. Figures 1-4 The reverse osmosis type composite filter element 1 in the initial state is shown, and the filter element wall 2 is like a spiral spring, of course, other curved shapes can also be provided in other embodiments; Figure 5 、 Figure 6The reverse osmosis type composite filter element 1 in the water flow state is shown in the limit stretch state, the filter element wall 2 is in a straight line type, which does not mean that the filter element wall 2 of the reverse osmosis type composite filter element 1 is in a straight line type during the water production process, which is adapted to the water flow stretch and bending, the two ends of the filter element wall 2 are respectively the water inlet end 11 and the water outlet end 12, the water outlet end 12 is provided with a concentrated water outlet and a pure water outlet; the pre-filter cavity 3, the reverse osmosis filter cavity 4 and the post-filter cavity 5 are arranged in the filter element wall 2 in the direction from the water inlet end 11 to the water outlet end 12. The water inlet end 11 and the water outlet end 12 are respectively distributed at the two ends of the filter element wall 2, the raw water enters the filter element wall 2 through the water inlet end 11 and is filtered, and the concentrated water and the pure water are respectively discharged from the concentrated water outlet and the pure water outlet provided at the water outlet end 12, so as to avoid cross contamination; the pre-filter cavity 3, the reverse osmosis filter cavity 4 and the post-filter cavity 5 are arranged in the direction from the water inlet end 11 to the water outlet end 12, that is, the raw water is preliminarily filtered in the pre-filter cavity 3 and then enters the reverse osmosis filter cavity 4 for filtering, so as to reduce the burden of the reverse osmosis filter element, and finally the water quality is further improved in the post-filter cavity 5, and the taste of the pure water is improved. The water outlet end 12 is also provided with a water outlet pipe 14, and the water outlet pipe 14 is provided with a concentrated water outlet and a pure water outlet.

[0055] As shown in Figures 1-7 , the pore size of the filter element wall 2 gradually decreases from the water inlet end 11 to the water outlet end 12, which is arranged on one hand to facilitate the curling of the filter element wall 2 to reduce the volume of the filter element, and on the other hand to facilitate the increase of the pressure to improve the filtering efficiency. The center pipe 13 is also provided in the reverse osmosis filter cavity 4, one end of the center pipe 13 facing the pre-filter cavity 3 is closed, the reverse osmosis membrane 6 is wound outside the center pipe 13, so that the center pipe 13 is located in the pure water area 8, the water passing through the reverse osmosis membrane 6 is collected to the center pipe 13, and the center pipe 13 is made of flexible material. The center pipe 13 is also provided in the reverse osmosis filter cavity 4 for collecting water passing through the reverse osmosis membrane 6, one end of the center pipe 13 facing the pre-filter cavity 3 is closed, so as to avoid the water in the pre-filter cavity 3 directly entering the pure water area 8 to cause cross contamination; the center pipe 13 is made of flexible material, so that it can adapt to the curling and stretching of the filter element wall 2.

[0056] As shown in Figure 4 , the cross section of the pre-filter cavity 3 is annular, and the water inlet is arranged on the region corresponding to the pre-filter cavity 3 at the water inlet end 11. The cross section of the pre-filter cavity 3 is annular, and the pre-filter material is placed in the annular region, which saves raw materials and makes the water flow uniform in the annular region; the water inlet is arranged on the region corresponding to the pre-filter cavity 3 at the water inlet end 11, which ensures that the water flow can directly enter the pre-filter cavity 3 for preliminary filtration;

[0057] Of course, the cross section of the pre-filter cavity 3 can also be circular, as shown in Figure 8 , arranging the pre-filter material in the entire circular cross section can improve the water quantity of the preliminary filtration. In other embodiments, the pre-filter cavity 3 is divided into a plurality of sub-cavities 15 along the water flow direction, as shown in Figure 9As shown, the plurality of sub-chambers 15 are in communication, and the pre-filter material is arranged in multiple stages in the plurality of sub-chambers 15, so that the pre-filter chamber 3 distributes the pre-filter material in multiple stages along the water flow direction, performs multi-stage filtration, further improves the water quality of the water passing through the pre-filter chamber 3, and reduces the burden of the reverse osmosis filter chamber 4. The pre-filter material is selected from one or more of PP cotton, activated carbon, and ceramic, which can effectively remove large particles, odors, residual chlorine, and small particles in the water, improve the purity and taste of the water, and reduce maintenance costs.

[0058] As shown in Figure 4 The post-filter material is arranged in the water purification pipeline 10; the post-filter material is selected from one or more of activated carbon, ultrafiltration membrane, and membrane chromatography. The activated carbon can reduce the pollution of the ultrafiltration membrane, prolong the service life of the ultrafiltration membrane, and reduce the maintenance cost; the ultrafiltration membrane and the membrane chromatography can effectively remove microorganisms and specific pollutants in the water, ensure that the microbial indicators of the outlet water meet the drinking water standards, and improve the purity and taste of the water. Of course, the post-filter chamber 5 can also be arranged in multiple sub-chambers 15, and the post-filter material is arranged in multiple stages in the multiple sub-chambers 15, so as to further improve the purity and taste of the water and reduce the maintenance cost.

[0059] The application also provides a water purifier comprising the reverse osmosis type composite filter element 1 as described above, so that the volume of the water purifier is reduced, thereby reducing the space occupied by the water purifier in the user's cabinet, improving the water quality of the water purifier, and reducing the requirements of the water purifier for the placement space.

[0060] Although the specific embodiments of the application are described above, those skilled in the art should understand that this is only an example, and the protection scope of the application is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the application, and these changes and modifications all fall within the protection scope of the application.

Claims

1. A reverse osmosis composite filter element, characterized in that, It comprises: A filter core wall, which is a hollow tubular structure, can automatically stretch under water flow in a crimped state in an initial state; The filter core wall is formed with a pre-filter cavity, a reverse osmosis filter cavity and a post-filter cavity, the pre-filter cavity is filled with pre-filter material, the post-filter cavity is filled with post-filter material, and the reverse osmosis filter cavity is filled with reverse osmosis membrane and divided into a concentrated water area and a pure water area, the pre-filter cavity communicates with the concentrated water area of the reverse osmosis filter cavity, the post-filter cavity is provided with a concentrated water pipeline and a pure water pipeline, the concentrated water pipeline communicates with the concentrated water area, and the pure water pipeline communicates with the pure water area; The filter core wall is made of shape memory material, and the filter core wall is stretched and crimped under the action of water flow by the shape memory material.

2. The reverse osmosis composite filter cartridge of claim 1, wherein, The filter core wall comprises a water inlet end and a water outlet end, the water outlet end is provided with a concentrated water outlet and a pure water outlet; and / or, the pre-filter cavity, reverse osmosis filter cavity, post-filter cavity are arranged in sequence along the direction from the water inlet end to the water outlet end.

3. The reverse osmosis composite filter cartridge of claim 2, wherein, The pore size of the filter core wall gradually decreases from the water inlet end to the water outlet end.

4. The reverse osmosis composite filter cartridge of claim 3, wherein, The reverse osmosis filter cavity is also provided with a center pipe, the reverse osmosis membrane is wound outside the center pipe, so that the center pipe is located in the pure water area, and the water passing through the reverse osmosis membrane is collected to the center pipe, and the center pipe is made of flexible material.

5. The reverse osmosis composite filter cartridge of claim 4, wherein, The pre-filter cavity is ring-shaped or circular tube-shaped, and the water inlet is opened on the water inlet end corresponding to the area where the pre-filter cavity is located.

6. The reverse osmosis composite filter cartridge of claim 5, wherein, The pre-filter cavity is divided into a plurality of sub-cavities along the water flow direction, the plurality of sub-cavities are communicated, and the pre-filter material is placed in the plurality of sub-cavities in a multi-stage arrangement.

7. The reverse osmosis composite filter cartridge of claim 6, wherein the reverse osmosis membrane is a spiral wound reverse osmosis membrane. The pre-filter material is selected from one or more of PP cotton, activated carbon and ceramic.

8. The reverse osmosis composite filter cartridge of any one of claims 1-7, wherein, The post-filter material is arranged in the pure water pipeline; and / or, the post-filter material is selected from one or more of activated carbon, ultrafiltration membrane and membrane chromatography.

9. A water purifier characterized by comprising: It comprises the reverse osmosis type composite filter core according to any one of claims 1-8.

Images