A water purifier filter core central tube, a rolled membrane assembly and a composite filter core assembly

Abstract

The present invention provides a water purifier filter core center tube, a roll membrane assembly and a composite filter core assembly, wherein the water purifier filter core center tube comprises: at least three columnar filter rods (1), and at least three of the columnar filter rods (1) are arranged so that the axial directions are all in the same direction, and at least three of the columnar filter rods (1) are arranged in a circumferential direction, and two adjacent columnar filter rods (1) are connected and arranged, and the columnar filter rods (1) are made of a filter material that allows fluid to pass through. The present invention can form a special-shaped center tube structure composed of multiple monomers, and the fluid can pass through it, and the contact area between the center tube and the fluid can be effectively increased without increasing the volume of the center tube, thereby effectively increasing the filtration area of ​​the center tube and enhancing the filtration effect; the volume of the filter core can be reduced under the same filtration effect.

Description

Technical Field

[0001] The invention belongs to the technical field of water purification, and in particular relates to a central tube of a filter element of a water purifier, a rolled membrane assembly and a composite filter element assembly. Background Art

[0002] The core component of the reverse osmosis water purifier is the reverse osmosis membrane (RO) filter element. The reverse osmosis filter element generally includes a central tube and a reverse osmosis membrane group wrapped around the periphery of the central tube. The central tube of the traditional water purifier is a tubular hollow structure. For example, patent CN207091063U discloses a central tube. The central tube is recessed in the outer surface of the tube wall of the central tube and is provided with a water guide groove, which is connected to the pure water hole, increasing the water inlet area of ​​the pure water hole on the central tube, thereby ensuring the amount of pure water passing through the pure water hole, and then ensuring the water outlet speed of the central tube.

[0003] Since the composite filter element of the water purifier in the prior art has technical problems such as limited filtration area, resulting in poor filtration effect, or increasing the filtration area while making the filter element larger, the present invention studies and designs a water purifier filter element central tube, a rolled membrane assembly and a composite filter element assembly. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of limited filtration area of ​​the composite filter element of the water purifier in the prior art, thereby providing a water purifier filter element central tube, a rolled membrane assembly and a composite filter element assembly.

[0005] The present invention provides a water purifier filter core tube, which comprises:

[0006] At least three columnar filter rods are arranged with their axial directions along the same direction, at least three columnar filter rods are arranged along the circumferential direction, and two adjacent columnar filter rods are connected to each other. The columnar filter rods are made of filter material that allows fluid to pass through.

[0007] Preferably,

[0008] The filter material that allows fluid to pass through includes at least one of carbon material, polypropylene (PP) material and ceramic material.

[0009] Preferably,

[0010] The filter material that allows fluid to pass through is made of carbon material, so that the columnar filter rod is a carbon rod; and / or the columnar filter rod is a solid structure.

[0011] Preferably,

[0012] The columnar filter rod is a cylindrical structure, and the central tube of the water purifier filter element includes a central axis, and at least three columnar filter rods are arranged in a circumferential direction around the central axis.

[0013] Preferably,

[0014] At least three columnar filter rods are evenly arranged around the central axis.

[0015] Preferably,

[0016] At least three of the columnar filter rods are integrally formed to form an integrated structure; or at least three of the columnar filter rods are split structures, and two adjacent columnar filter rods are sealed at the joint.

[0017] Preferably,

[0018] At least three of the columnar filter rods are integrally formed by injection molding or casting.

[0019] Preferably,

[0020] The outer surface of the columnar filter rod is formed into a structure having at least one groove; and / or the interior of the columnar filter rod has at least one hole structure.

[0021] Preferably,

[0022] The groove is in the shape of a strip or a thread; and / or, the outer surface of the columnar filter rod has a plurality of the grooves; and / or, the interior of the columnar filter rod has a plurality of the hole structures to form a honeycomb structure.

[0023] The present invention also provides a rolled membrane assembly, which includes the central tube of the water purifier filter element as described in any of the preceding items, and also includes a rolled membrane wound around the outer circumference of the central tube, and the rolled membrane can allow water to pass through and filter the water.

[0024] Preferably,

[0025] A support sleeve with a cylindrical structure is also arranged on the radial inner side of the central tube, the inner side of the inner wall of the support sleeve has a cavity, and at least one water hole is also arranged on the support sleeve.

[0026] The present invention also provides a central tube of a water purifier filter element, which comprises the rolled membrane assembly described in any of the preceding items.

[0027] The water purifier filter core central tube, spiral membrane assembly and composite filter core assembly provided by the present invention have the following beneficial effects:

[0028] The present invention arranges the central tube of the filter element into a structural form including at least three columnar filter rods, and the columnar filter rods are arranged in a circumferential direction and connected to each other, and the columnar filter rods are made of a filter material that allows fluid to pass through, so as to form a special-shaped central tube structure composed of a plurality of monomers, through which the fluid can pass. The contact area between the central tube and the fluid can be effectively increased without increasing the volume of the central tube, thereby effectively increasing the filtration area of ​​the central tube and enhancing the filtration effect; the volume of the filter element can be reduced while maintaining the same filtration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of a first embodiment of the central tube of a water purifier filter element of the present invention;

[0030] Figure 2 This is a structural schematic diagram of a second embodiment of the central tube of a water purifier filter element of the present invention;

[0031] Figure 3 This is a schematic structural diagram of a third embodiment of the central tube of a water purifier filter element of the present invention;

[0032] Figure 4 1 is a schematic structural diagram of a first embodiment of a spiral membrane assembly of the present invention;

[0033] Figure 5 1 is a schematic structural diagram of a second embodiment of a spiral membrane assembly of the present invention;

[0034] Figure 6 1 is a schematic structural diagram of a third embodiment of a clean roll membrane assembly of the present invention;

[0035] Figure 7 1 is a schematic structural diagram of a fourth embodiment of a clean roll membrane assembly of the present invention;

[0036] Figure 8 It is a schematic diagram of the internal structure of the composite filter element assembly of the present invention.

[0037] The reference numerals in the figure represent:

[0038] 10. Center tube; 1. Columnar filter rod; o. Center axis; 2. Groove; 3. Hole structure; 4. Rolled membrane; 5. Support sleeve; 51. Cavity. DETAILED DESCRIPTION

[0039] like Figure 1-8 As shown, the present invention provides a water purifier filter core central tube, which includes:

[0040] At least three columnar filter rods 1 are arranged with their axial directions along the same direction, at least three columnar filter rods 1 are arranged along the circumferential direction, and two adjacent columnar filter rods 1 are connected to each other, and the columnar filter rods 1 are made of filter material that allows fluid to pass through.

[0041] The present invention arranges the central tube of the filter element into a structural form including at least three columnar filter rods, and the columnar filter rods are arranged in a circumferential direction and connected to each other, and the columnar filter rods are made of a filter material that allows fluid to pass through, so as to form a special-shaped central tube structure composed of a plurality of monomers, through which the fluid can pass. The contact area between the central tube and the fluid can be effectively increased without increasing the volume of the central tube, thereby effectively increasing the filtration area of ​​the central tube and enhancing the filtration effect; the volume of the filter element can be reduced while maintaining the same filtration effect.

[0042] Preferably,

[0043] The filter material that allows fluid to pass through includes at least one of carbon material, polypropylene pp material and ceramic material. This is the preferred material of the filter material of the present invention, which can effectively allow water to pass through. In addition, it can also filter the water passing through it, and can achieve a primary filtering effect while supporting the central tube, thereby overcoming the defect of increased volume due to increased filter element levels, reducing volume and saving costs.

[0044] Preferably,

[0045] The filter material that allows fluid to pass through is made of carbon material, so that the columnar filter rod 1 is a carbon rod; and / or, the columnar filter rod 1 is a solid structure. It is preferred to use carbon that can improve the taste as the central tube material of the rolled membrane element, so that the plastic central tube used in the existing rolled membrane can be discarded, avoiding the use of the existing plastic central tube of the rolled membrane element, and realizing that one membrane element has a two-stage filtration function; using the carbon central tube, the subsequent use of the taste filter element can be avoided, and the membrane element integrates the two-stage filtration functions of the fine filtration filter element and the post-taste filter element; the carbon central tube has no visible macropores, and its surface is covered with structural micropores. Compared with the traditional plastic central tube with visible macropores, the water produced by the rolled membrane is easier to collect.

[0046] Preferably,

[0047] The columnar filter rod 1 is a cylindrical structure, and the central tube of the water purifier filter element includes a central axis o, and at least three columnar filter rods 1 are arranged in a circumferential direction around the central axis o. This is the preferred structural form of the columnar filter rod of the present invention, which can form a structural form of a cylindrical central tube, thereby increasing the filtering effect.

[0048] Preferably,

[0049] At least three columnar filter rods 1 are evenly arranged around the central axis o, which can enhance the filtering effect of the columnar filter rods.

[0050] Preferably,

[0051] At least three of the columnar filter rods 1 are integrally formed to form an integrated structure; or at least three of the columnar filter rods 1 are split structures, and two adjacent columnar filter rods 1 are sealed at the joint. This is the preferred molding method of the columnar filter rod of the present invention. The integral structure can be formed by the integral molding method, which improves the assembly accuracy and the sealing performance. The split structure and sealing at the joints can improve the sealing effect, increase the filtration area, and improve the filtration effect. A carbon rod center tube for a reverse osmosis filter element of a water purifier, which is composed of a plurality of (at least 3, such as 8 in the attached figure, the actual number is selected as needed) long and thin carbon rods arranged and combined evenly along the same axis. It can also be integrally formed. If it is split, the position where the two thin carbon rods intersect needs to be sealed to form a closed flow channel. The sealing method can be but is not limited to sealant.

[0052] Preferably,

[0053] At least three of the columnar filter rods 1 are integrally formed by injection molding or casting, which is a preferred integral molding method for the columnar filter rod of the present invention, and improves molding efficiency.

[0054] Preferably,

[0055] The outer surface of the columnar filter rod 1 is formed into a structure having at least one groove 2; and / or, the interior of the columnar filter rod 1 has at least one hole structure 3. This is the preferred structural form of the second and third embodiments of the present invention. For the second embodiment, see Figure 2 and Figure 5 , which can increase the outer surface area of ​​the columnar filter rod, thereby effectively increasing the contact area between it and the fluid and increasing the filtering effect; Example 3, see Figure 3 and Figure 6 , which can increase the basic area of ​​the interior of the columnar filter rod and the fluid, thereby increasing the filtering effect.

[0056] That is, in order to further increase the filtering area, a number of grooves can be further added to the outer surface of the thin carbon rod. The shape of the grooves can be strip-shaped, spiral-shaped or other shapes, as long as the area can be increased.

[0057] In order to further increase the filtering area, the internal structure of the thin carbon rod can be a honeycomb structure or other structures that can increase the area.

[0058] Preferably,

[0059] The shape of the groove 2 is strip-shaped or thread-shaped; and / or, the outer surface of the columnar filter rod 1 has a plurality of the grooves 2; and / or, the interior of the columnar filter rod 1 has a plurality of the hole structures 3 to form a honeycomb structure. This is the preferred shape and preferred structural form of the grooves of the present invention, and the preferred structural form of the hole structure. The plurality of grooves can further effectively increase the contact area between the outer surface of the filter rod and the fluid, and the plurality of hole structures can further effectively increase the contact area between the interior of the filter rod and the fluid, thereby effectively increasing the filtration area and improving the filtration effect.

[0060] The present invention also provides a roll membrane assembly, which includes the central tube of the water purifier filter element as described in any of the preceding items, and also includes a roll membrane 4 (reverse osmosis membrane, RO membrane) wound around the outer circumference of the central tube 10, and the roll membrane 4 can allow water to pass through and filter the water. The present invention arranges the central tube of the filter element into a structural form including at least three columnar filter rods, and the columnar filter rods are arranged in a circumferential direction and connected to each other, and the columnar filter rods are made of a filter material that allows fluid to pass through, so as to form a special-shaped central tube structure composed of multiple monomers, and the fluid can pass through it, and the contact area between the central tube and the fluid can be effectively increased without increasing the volume of the central tube, thereby effectively increasing the filtration area of ​​the central tube and enhancing the filtration effect; the volume of the filter element can be reduced under the same filtration effect.

[0061] Preferably,

[0062] The radial inner side of the central tube 10 is also provided with a support sleeve 5 of a cylindrical structure, the inner side of the inner wall of the support sleeve 5 has a cavity 51, and the support sleeve 5 is also provided with at least one water hole. The support sleeve is also provided on the radial inner side of the inner wall of the central tube, which can support the material with filtering function (because it has filtering function, usually its structural strength is not enough to support or the support strength is not high enough), thereby improving the function of firmly fixing the central tube and providing conditions for achieving long-term filtering. In order to strengthen the strength of the thin carbon rod, a support sleeve can be added at the center of the carbon rod. The support sleeve can be cylindrical, annular, or fence-shaped, etc. The support sleeve has a through hole on the surface to allow water to pass through. The support sleeve can be a high-hardness material such as metal.

[0063] The present invention also provides a composite filter element assembly, which comprises the rolled membrane assembly described in any of the preceding items.

[0064] The composite filter element of the present invention comprises the above-mentioned carbon rod central tube, and also includes a pretreatment filter element, an RO filter element and a post-filter element. The pretreatment filter element can be PP cotton and an activated carbon filter element, and the post-filter element can be an ultrafiltration element. The raw water becomes purified water after passing through the pretreatment filter element and enters the RO filter element. The central tube of the RO filter element is the above-mentioned carbon rod central tube, and also plays the role of post-filtration. The water passing through the RO filter element becomes pure water, and finally is output to the user terminal for use after post-ultrafiltration and antibacterial.

[0065] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention. These improvements and variations should also be regarded as the protection scope of the present invention.

Claims

1. A spiral membrane module, characterized in that: It comprises a central tube of a water purifier filter element, and also comprises a roll-type membrane (4) wound around the outer circumference of the central tube (10), wherein the roll-type membrane (4) is capable of allowing water to pass through and filtering the water; The water purifier filter core central tube comprises: At least three columnar filter sticks (1), wherein at least three columnar filter sticks (1) are arranged with their axial directions all in the same direction, and at least three columnar filter sticks (1) are arranged in a circumferential direction, and two adjacent columnar filter sticks (1) are arranged in contact with each other, and the columnar filter sticks (1) are made of a filter material that allows fluid to pass through; A support sleeve (5) with a cylindrical structure is also provided on the radial inner side of the central tube (10); the inner side of the inner wall of the support sleeve (5) has a cavity (51); and the support sleeve (5) is also provided with at least one water hole; The columnar filter rod (1) is a cylindrical structure, and the central tube of the water purifier filter element comprises a central axis (o), and at least three columnar filter rods (1) are arranged in a circumferential direction around the central axis (o); At least three of the columnar filter rods (1) are integrally formed to form an integrated structure; or at least three of the columnar filter rods (1) are split structures, and two adjacent columnar filter rods (1) are sealed at the joint.

2. The wound membrane assembly according to claim 1, characterized in that: The filter material that allows fluid to pass through includes at least one of carbon material, polypropylene (PP) material and ceramic material.

3. The wound membrane assembly according to claim 2, characterized in that: The filter material that allows fluid to pass through is made of carbon material, so that the columnar filter rod (1) is a carbon rod; and / or the columnar filter rod (1) is a solid structure.

4. The spiral wound membrane assembly according to claim 1, characterized in that: At least three of the columnar filter rods (1) are evenly arranged around the central axis (o).

5. The spiral wound membrane assembly according to claim 1, characterized in that: At least three of the columnar filter rods (1) are integrally formed by injection molding or casting.

6. The spiral wound membrane module according to any one of claims 1 to 5, characterized in that: The outer surface of the columnar filter rod (1) is formed into a structure having at least one groove (2); and / or the interior of the columnar filter rod (1) has at least one hole structure (3).

7. The spiral wound membrane assembly according to claim 6, characterized in that: The shape of the groove (2) is strip-shaped or thread-shaped; and / or the outer surface of the columnar filter rod (1) has a plurality of the grooves (2); and / or the interior of the columnar filter rod (1) has a plurality of the hole structures (3).

8. A composite filter element assembly, characterized in that: The invention comprises the spiral membrane assembly according to any one of claims 1 to 7.

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