Reverse osmosis type composite filter element and water purifier

Abstract

The invention 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 of a hollow tubular structure, the filter element wall is in a curled state in an initial state, and the filter element wall can adapt to water flow to automatically stretch in a water flow state; a front filter cavity, a reverse osmosis filter cavity and a rear filter cavity are formed in the wall of the filter element and are respectively filled with a front filter material, a rear filter material, a reverse osmosis membrane and a reverse osmosis membrane, the reverse osmosis cavity is divided into a concentrated water area and a purified water area, the front 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 rear filter cavity, and the concentrated water pipeline is communicated with the concentrated water area; the water purification pipeline is communicated with the water purification area; the front filter material, the reverse osmosis filter material and the rear filter material are integrated on one filter element to form a composite filter element to improve the water quality, the wall of the filter element extends and curls along with dynamic change of water pressure, the filtering surface area is increased, the functions of automatically pressurizing the water pressure and self-cleaning are achieved, and extra pressurizing equipment and a backwashing water path do not need to be configured.

Description

Technical Field

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

[0002] In the field of kitchen appliances, water purifiers are one of the indispensable devices in the home. The water purifiers on the current market mainly use multiple filter cartridges in a multi-stage filter cartridge method to purify water quality, which results in a large volume of the entire water purifier, occupying a large space in the user's cabinet; the existing water purifiers, when there is a reverse osmosis filter cartridge, need to be equipped with an additional booster pump to increase the water pressure; due to long-term use, the scale of the filter cartridge of the water purifier affects normal use, so it needs to be cleaned. The existing water purifiers often use backwashing water channels for flushing, resulting in the need for additional backwashing water channels; there are also water purifiers that are not equipped with backwashing water channels to remove the filter cartridge for flushing, but the operation is inconvenient, which brings inconvenience to users. Summary of the invention

[0003] In order to overcome the defects in the prior art that multiple filter cartridges lead to a large volume of a water purifier, a booster pump is required for pressurization, or an additional backwashing water circuit is required, the present invention provides a reverse osmosis type composite filter element and a water purifier.

[0004] The present invention solves the above technical problems through the following technical solutions:

[0005] The present invention provides a reverse osmosis composite filter element, comprising: a filter element wall, wherein the filter element wall is a hollow tubular structure, wherein the filter element wall is in a curled state in an initial state, and can automatically stretch to adapt to the water flow in a state where there is water flow; wherein a pre-filter chamber, a reverse osmosis filter chamber and a post-filter chamber are formed in the filter element wall, wherein the pre-filter chamber is filled with a pre-filter material; wherein the post-filter chamber is filled with a post-filter material; wherein the reverse osmosis chamber is filled with a reverse osmosis membrane and the reverse osmosis chamber is divided into a concentrated water area and a clean water area; wherein the pre-filter chamber is connected to the concentrated water area of ​​the reverse osmosis chamber; wherein a concentrated water pipeline and a clean water pipeline are arranged in the post-filter chamber; wherein the concentrated water pipeline is connected to the concentrated water area; and wherein the clean water pipeline is connected to the clean water area.

[0006] In this solution, the filter element wall is set to be in a curled state in the initial state, and can automatically stretch to adapt to the water flow when there is water flow, that is, the filter element wall also stretches and curls dynamically when the water pressure changes dynamically, thereby increasing the filtration surface area and improving the filtration efficiency; and the water pressure is automatically pressurized without additional pressurization; the automatic stretching and curling action of the filter element wall also helps to remove impurities attached to the surface of the filter element, reduces the cleaning frequency of the filter element, and extends the service life of the filter element; a pre-filter chamber, a reverse osmosis filter chamber and a post-filter chamber are formed in the filter element wall, which are filled with pre-filter materials, reverse osmosis membranes and post-filter materials respectively, so that the pre-filter materials, reverse osmosis filter materials and post-filter materials are integrated on a filter element, thereby forming a composite filter element, which can save space while improving water quality; the concentrated water pipeline is connected to the concentrated water area; the clean water pipeline is connected to the clean water area to ensure the separation of concentrated water and clean water, avoid cross contamination between the two, and further improve the purity of the water quality.

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

[0008] In this solution, the filter element wall is made of shape memory material, and the shape memory material is used to achieve the stretching and curling of the filter element wall under the action of water flow. Usually, a shape memory material with corresponding shape memory parameters is selected according to the rated water inlet pressure and water production pressure.

[0009] Preferably, the two ends of the filter element 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 chamber, reverse osmosis filter chamber, and post-filter chamber are arranged in sequence from the water inlet end to the water outlet end.

[0010] In this scheme, the water inlet and the water outlet are respectively distributed at the two ends of the filter element wall. The raw water enters the filter element wall through the water inlet, and after filtration, the concentrated water and the clean water are discharged from the concentrated water outlet and the clean water outlet respectively arranged at the water outlet to avoid cross contamination; the pre-filter chamber, the reverse osmosis filter chamber, and the post-filter chamber are arranged in sequence from the water inlet to the water outlet, that is, the raw water is initially filtered through the pre-filter chamber and then enters the reverse osmosis filter chamber for filtration, which reduces the burden on the reverse osmosis filter element, and finally passes through the post-filter chamber to further improve the water quality and enhance the taste of the purified water.

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

[0012] In this solution, the pore size of the filter element wall gradually decreases from the water inlet end to the water outlet end, which facilitates the curling of the filter element wall to reduce the volume of the filter element on the one hand, and facilitates increasing the pressure and enhancing the filtration efficiency on the other hand.

[0013] Preferably, a central tube is also provided in the reverse osmosis filter chamber, and the central tube is closed at one end facing the pre-filter chamber. The reverse osmosis membrane is wound outside the central tube so that the central tube is located in the water purification area. Water passing through the reverse osmosis membrane is collected in the central tube, and the central tube is made of flexible material.

[0014] In this solution, a central tube is also provided in the reverse osmosis filter chamber for collecting water passing through the reverse osmosis membrane. The central tube is closed at one end facing the pre-filter chamber, thereby preventing the water in the pre-filter chamber from directly entering the water purification area and causing cross contamination; the central tube is made of a flexible material so that it can adapt to the curling and stretching of the filter element wall.

[0015] Preferably, the cross-section of the pre-filter chamber is annular or circular, and the water inlet is arranged at the area where the water inlet end corresponds to the pre-filter chamber.

[0016] In this solution, the water inlet is opened at the water inlet end corresponding to the area where the pre-filter chamber is located, ensuring that the water flow can directly enter the pre-filter chamber for preliminary filtration; the cross-section of the pre-filter chamber is annular and the pre-filter material is placed only in the annular area, saving raw materials and ensuring that the water flow in the annular area is uniform; the cross-section of the pre-filter chamber is circular, and the arrangement of the pre-filter material in the entire circular area can increase the amount of water for initial filtration.

[0017] Preferably, the pre-filter chamber is divided into a plurality of sub-chambers along the water flow direction, the plurality of sub-chambers are interconnected, and the pre-filter materials are placed in the plurality of sub-chambers in a multi-stage arrangement.

[0018] In this solution, the pre-filter chamber is provided with multi-stage pre-filter materials distributed along the water flow direction to perform multi-polar filtration, thereby further improving the water quality passing through the pre-filter chamber and reducing the burden on the reverse osmosis filter chamber.

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

[0020] In this solution, large particles of impurities, odor, residual chlorine and tiny particles in the water can be effectively removed, the purity and taste of the water can be improved, and maintenance costs can be reduced.

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

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

[0023] The present invention also provides a water purifier, which includes the reverse osmosis composite filter element 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, while improving the water quality of the water purifier and reducing the water purifier's requirement for placement space.

[0024] The positive and progressive effects of the present invention are as follows: the filter element wall of the reverse osmosis composite filter element is set to a curled state in the initial state, and can automatically stretch to adapt to the water flow when there is water flow, and a pre-filter chamber, a reverse osmosis filter chamber and a post-filter chamber are formed in the filter element wall, and the pre-filter material, the reverse osmosis filter material and the post-filter material are integrated on one filter element, thereby forming a reverse osmosis composite filter element; the filter element wall also dynamically stretches and curls when the water pressure changes dynamically, thereby increasing the filtration surface area, realizing the autonomous pressurization of the water pressure and the self-cleaning function, without the need for additional configuration of a booster device and a backwashing waterway, thereby reducing costs, that is, simplifying the structure while improving the water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic structural diagram of a reverse osmosis composite filter element in an initial state according to an embodiment of the present invention.

[0026] Figure 2 FIG1 is a schematic diagram of a reverse osmosis composite filter element in one embodiment of the present invention in one direction of the initial structure. FIG1 is a schematic diagram of a reverse osmosis composite filter element in one direction of the initial structure.

[0027] Figure 3 FIG2 is a schematic diagram of the reverse osmosis composite filter element in one embodiment of the present invention in the initial state structure in one direction. ...

[0028] Figure 4 FIG1 is an internal cross-sectional view of a reverse osmosis composite filter element in an initial state according to an embodiment of the present invention (I).

[0029] Figure 5 It is a schematic structural diagram of a reverse osmosis composite filter element in an embodiment of the present invention when it is stretched to its limit.

[0030] Figure 6 for Figure 5 Internal cross-sectional view of .

[0031] Figure 7 for Figure 5 Schematic diagram of the reverse osmosis composite filter element in the direction of the water outlet.

[0032] Figure 8 This is an internal cross-sectional view of a reverse osmosis composite filter element in an initial state according to an embodiment of the present invention (II).

[0033] Fig. 9 This is an internal cross-sectional view of a reverse osmosis composite filter element in an initial state according to an embodiment of the present invention (III).

[0034] Description of Reference Numerals

[0035] Reverse osmosis composite filter element 1

[0036] Filter 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 area 7

[0042] Water purification area 8

[0043] Concentrated water pipeline 9

[0044] Clean water pipeline 10

[0045] Water inlet 11

[0046] Water outlet 12

[0047] Center tube 13

[0048] Outlet pipe 14

[0049] Chamber 15 DETAILED DESCRIPTION

[0050] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0051] The siphon mouthpart is a mouthpart unique to Lepidoptera moths and butterflies, suitable for sucking nectar, fruit juice and other liquid foods. The mandibular lobe of this mouthpart is extended to form a curlable and elastic beak. The cross-section of the mandibular lobe is crescent-shaped, and the cavity is filled with blood, which contains trachea, nerves and short muscles extending obliquely along the wall of the mandibular lobe. The left and right mandibular lobes are connected on the dorsal and ventral surfaces to form a beak, forming a food tract. Except for the hole at the end and the opening at the base of the mouth, the beak cavity is sealed and can only slide longitudinally. The suction mechanism is the food sinus - the throat pump. The mouth is located at the base of the beak. Normally, the beak is curled between the two labial palps. When feeding, the beak extensor muscles contract, forcing part of the blood to flow into the mandibular lobe cavity, so the beak stretches, and liquid food is sucked into the food tract through the opening of the beak and then enters the mouth. When the beak extensor muscle relaxes, the inner muscle of the outer maxilla contracts, blood flows backward from the outer maxilla, and the beak curls. The present invention draws on the siphon mouthparts, imitates the structural design of the siphon mouthparts of insects, and combines the principles of biology and engineering to provide a reverse osmosis composite filter element 1, such as Figure 1-Figure 7As shown, the reverse osmosis composite filter element 1 includes: a filter element wall 2, which is a hollow tubular structure. The filter element wall 2 is in a curled state in the initial state, and can automatically stretch to adapt to the water flow when there is water flow; a pre-filter chamber 3, a reverse osmosis filter chamber 4 and a post-filter chamber 5 are formed in the filter element wall 2, and the pre-filter chamber 3 is filled with a pre-filter material; the post-filter chamber 5 is filled with a post-filter material, the reverse osmosis chamber is filled with a reverse osmosis membrane 6 and the reverse osmosis chamber is divided into a concentrated water area 7 and a clean water area 8, the pre-filter chamber 3 is connected to the concentrated water area 7 of the reverse osmosis chamber, and a concentrated water pipeline 9 and a clean water pipeline 10 are arranged in the post-filter chamber 5, the concentrated water pipeline 9 is connected to the concentrated water area 7; the clean water pipeline 10 is connected to the clean water area 8.

[0052] The present invention imitates the structure of the beak of a siphon mouthpart and its dynamic changes during feeding, sets the filter element wall 2 of the reverse osmosis composite filter element 1 to a curled state in the initial state, and can automatically stretch to adapt to the water flow when there is water flow, that is, the filter element wall 2 also stretches and curls dynamically when the water pressure changes dynamically, thereby increasing the filtering surface area and improving the filtering efficiency; and 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 filter element A pre-filter chamber 3, a reverse osmosis filter chamber 4 and a post-filter chamber 5 are formed in the wall 2, which are filled with a pre-filter material, a reverse osmosis membrane 6 and a post-filter material respectively, so that the pre-filter, reverse osmosis and post-filter are integrated on a filter element, thereby forming a reverse osmosis composite filter element 1, which can save space while improving water quality; the concentrated water pipeline 9 is connected with the concentrated water area 7; the clean water pipeline 10 is connected with the clean water area 8 to ensure the separation of concentrated water and clean water, avoid cross contamination between the two, and further improve the purity of the water quality, wherein the initial state refers to the state of no water pressure and no water production, and the water flow state refers to the state of water production with water pressure.

[0053] Among them, the beak of the siphon mouthparts achieves curling and extension through its muscles. The filter element wall 2 of the present invention is made of shape memory material, and the filter element wall 2 is stretched and curled under the action of water flow through the shape memory material. Usually, a shape memory material with corresponding shape memory parameters is selected according to the rated water inlet pressure and water production pressure.

[0054] in Figure 1-Figure 4 The reverse osmosis composite filter element 1 is shown in an initial state, in which the filter element wall 2 is spirally shaped like a clockwork spring. Of course, in other embodiments, other curved shapes may also be provided; Figure 5 , Figure 6The reverse osmosis composite filter element 1 is shown in an extreme extension state in a water flow state, and its filter element wall 2 is straight, which does not mean that the filter element wall 2 of the reverse osmosis composite filter element 1 must be in a straight line during the water production process. It adapts to the extension and bending of the water flow. The two ends of the filter element wall 2 are respectively an inlet end 11 and an outlet end 12. The outlet end 12 is provided with a concentrated water outlet and a clean water outlet; the pre-filter chamber 3, the reverse osmosis filter chamber 4, and the post-filter chamber 5 are arranged in sequence in the filter element wall 2 along the direction from the inlet end 11 to the outlet end 12. The water inlet 11 and the water outlet 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 11, and after filtration, the concentrated water and the purified water are discharged from the concentrated water outlet and the purified water outlet provided at the water outlet 12, respectively, to avoid cross contamination; the pre-filter chamber 3, the reverse osmosis filter chamber 4, and the post-filter chamber 5 are arranged in sequence from the water inlet 11 to the water outlet 12, that is, the raw water is initially filtered through the pre-filter chamber 3 and then enters the reverse osmosis filter chamber 4 for filtration, which reduces the burden on the reverse osmosis filter element, and finally passes through the post-filter chamber 5 to further improve the purified water quality and enhance the purified water taste. The water outlet 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 purified water outlet.

[0055] like Figure 1-Figure 7 As shown, the pore size of the filter element wall 2 gradually decreases from the water inlet end 11 to the water outlet end 12. This arrangement facilitates the curling of the filter element wall 2 to reduce the volume of the filter element on the one hand, and facilitates the increase of pressure and the filtration efficiency on the other hand. A central tube 13 is also provided in the reverse osmosis filter chamber 4. The central tube 13 is closed at one end toward the pre-filter chamber 3. The reverse osmosis membrane 6 is wound outside the central tube 13, so that the central tube 13 is located in the clean water area 8. The water passing through the reverse osmosis membrane 6 is collected in the central tube 13. The central tube 13 is made of flexible material. A central tube 13 is also provided in the reverse osmosis filter chamber 4 for collecting water passing through the reverse osmosis membrane 6. The central tube 13 is closed at one end toward the pre-filter chamber 3, thereby preventing the water in the pre-filter chamber 3 from directly entering the clean water area 8 and causing cross contamination; the central tube 13 is made of flexible material so that it can respond to the curling and stretching of the filter element wall 2.

[0056] like Figure 4 As shown, the cross section of the pre-filter chamber 3 is annular, and the water inlet is opened at the water inlet end 11 corresponding to the area where the pre-filter chamber 3 is located. The cross section of the pre-filter chamber 3 is annular, and the pre-filter material is placed only in the annular area, saving raw materials, and the water flow in the annular area is uniform; the water inlet is opened at the water inlet end 11 corresponding to the area where the pre-filter chamber 3 is located, ensuring that the water flow can directly enter the pre-filter chamber 3 for preliminary filtration;

[0057] Of course, the cross section of the pre-filter chamber 3 can also be circular, such as Figure 8 As shown, the arrangement of the pre-filter material in the corresponding area of ​​the entire circular cross section can increase the amount of water initially filtered. In other embodiments, the pre-filter chamber 3 is divided into a plurality of sub-chambers 15 along the water flow direction, such as Fig. 9As shown, multiple sub-cavities 15 are connected, and pre-filter materials are placed in multiple sub-cavities 15 in a multi-stage arrangement, so that the pre-filter cavity 3 distributes multi-stage pre-filter materials along the water flow direction, performs multi-polar filtration, further improves the water quality passing through the pre-filter cavity 3, and reduces the burden of the reverse osmosis filter cavity 4. The pre-filter material is selected from one or more of PP cotton, activated carbon, and ceramics, which can effectively remove large particle impurities, odors, residual chlorine and tiny particles in the water, improve the purity and taste of water quality, and reduce maintenance costs.

[0058] like Figure 4 As shown, 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. Activated carbon can reduce the pollution of ultrafiltration membrane, extend the service life of ultrafiltration membrane, and reduce maintenance costs; ultrafiltration membrane and 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 quality. Of course, the post-filter chamber 5 can also be arranged in multiple sub-chambers 15, and the post-filter material is placed in multiple sub-chambers 15 in a multi-stage arrangement, and the water coming out of the reverse osmosis filter chamber 4 is further subjected to multi-polar filtration to improve the purity and taste of the water quality and reduce maintenance costs.

[0059] The present invention also provides a water purifier, which includes the reverse osmosis 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, while improving the water quality of the water purifier and reducing the water purifier's requirement for placement space.

[0060] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that this is only for illustration and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A reverse osmosis composite filter element, characterized in that: include: The filter core wall is a hollow tubular structure, and the filter core wall is in a curled state in an initial state, and can automatically stretch to adapt to the water flow when there is water flow; A pre-filter chamber, a reverse osmosis filter chamber and a post-filter chamber are formed in the filter element wall. The pre-filter chamber is filled with a pre-filter material; the post-filter chamber is filled with a post-filter material; the reverse osmosis chamber is filled with a reverse osmosis membrane and the reverse osmosis chamber is divided into a concentrated water area and a clean water area; the pre-filter chamber is connected to the concentrated water area of ​​the reverse osmosis chamber; a concentrated water pipeline and a clean water pipeline are arranged in the post-filter chamber; the concentrated water pipeline is connected to the concentrated water area; the clean water pipeline is connected to the clean water area.

2. The reverse osmosis composite filter element according to claim 1, characterized in that: The filter element wall is made of shape memory material.

3. The reverse osmosis composite filter element according to claim 2, characterized in that: The filter element wall comprises a water inlet and a water outlet, the water outlet is provided with a concentrated water outlet and a clean water outlet; and / or the pre-filter chamber, the reverse osmosis filter chamber and the post-filter chamber are arranged in sequence from the water inlet to the water outlet.

4. The reverse osmosis composite filter element according to claim 3, characterized in that: The pore size of the filter element wall gradually decreases from the water inlet end to the water outlet end.

5. The reverse osmosis composite filter element according to claim 4, characterized in that: A central tube is also arranged in the reverse osmosis filter chamber, and the reverse osmosis membrane is wound outside the central tube, so that the central tube is located in the water purification area, and the water passing through the reverse osmosis membrane is collected in the central tube, and the central tube is made of flexible material.

6. The reverse osmosis composite filter element according to claim 5, characterized in that: The pre-filter chamber is in the shape of an annular tube or a circular tube, and the water inlet is arranged at the area where the water inlet end corresponds to the pre-filter chamber.

7. The reverse osmosis composite filter element according to claim 6, characterized in that: The pre-filter chamber is divided into a plurality of sub-chambers along the water flow direction, the plurality of sub-chambers are interconnected, and the pre-filter materials are placed in the plurality of sub-chambers in a multi-stage arrangement.

8. The reverse osmosis composite filter element according to claim 7, characterized in that: The pre-filter material is selected from one or more of PP cotton, activated carbon, and ceramics.

9. The reverse osmosis composite filter element according to any one of claims 1 to 8, characterized in that: The post-filter material is arranged in the water purification pipeline; and / or the post-filter material is selected from one or more of activated carbon, ultrafiltration membrane, and membrane chromatography.

10. A water purifier, characterized in that: It comprises the reverse osmosis composite filter element as described in any one of claims 1 to 9.

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