A filter and water purifier

Abstract

The utility model discloses a filter and water purifier belong to water treatment technical field, including primary filter core and secondary filter core. Primary filter core includes a plurality of activated carbon filter stick and water cavity. Secondary filter core includes first porous base material layer, ultrafiltration membrane layer and cooperation cavity. The filter is through setting up activated carbon filter stick with water cavity, and water can enter activated carbon inside along filter stick axial fully, thereby significantly increasing the contact area of water flow and activated carbon, improve adsorption efficiency and removal capacity. The cooperation cavity in secondary filter core and activated carbon filter stick adopt the structure of setting up, and water flow directly enters the ultrafiltration membrane coating area after flowing out from activated carbon filter stick, forms compact flow path, makes full use of limited filter space. Realize high contact efficiency and low flow resistance filter form, reduce pressure drop, improve overall water speed and filter efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of water treatment technology, specifically a filter and a water purifier. Background Technology

[0002] Currently, multi-stage filtration structures are commonly used in household and industrial water purification equipment to remove impurities such as sediment, rust, residual chlorine, organic matter, and bacteria from tap water or raw water. Common filters and pre-filtration systems for water purifiers primarily employ a combination of activated carbon and ultrafiltration membrane technologies.

[0003] Activated carbon filters primarily utilize the microporous structure and strong adsorption capacity of activated carbon to remove odors, residual chlorine, and some organic pollutants from water, improving the taste of the water. Ultrafiltration membrane filters, on the other hand, achieve physical retention through their microporous membrane structure, effectively removing suspended solids, colloids, bacteria, and other tiny particles for deep purification.

[0004] However, in existing technologies, multi-stage filter cartridges generally adopt a simple series structure, where raw water flows sequentially through an activated carbon layer and an ultrafiltration membrane layer to complete the filtration step by step. While this series filtration method can achieve multiple purification effects, it has the following drawbacks: After each filter layer is connected in series independently, the water flow must overcome the pressure drop of each filter media in turn, resulting in a decrease in overall water flow velocity and lower filtration efficiency. In the series structure, the upstream filter media bears the main responsibility for intercepting impurities, making it prone to localized clogging or saturation, while the effective filtration area of ​​the downstream filter media cannot be fully utilized. Series-connected multi-stage filter cartridges typically require segmented sealing and connection, leading to inconsistent replacement cycles and increased maintenance difficulty. Utility Model Content

[0005] The purpose of this invention is to provide a filter and a water purifier to solve the problems mentioned in the prior art.

[0006] Provide a filter, comprising: The primary filter element consists of multiple activated carbon filter rods, with one end of each activated carbon filter rod extending inward to form a water passage cavity. The secondary filter element includes a first porous substrate layer and an ultrafiltration membrane layer. The first porous substrate layer has multiple mating cavities that can be sleeved with corresponding activated carbon filter rods. The ultrafiltration membrane layer is arranged along the side wall of the first porous substrate layer located in the mating cavity area. The opening of the water passage cavity faces the end of the activated carbon filter rod away from the secondary filter element.

[0007] As a further embodiment of this invention, a second porous substrate layer is provided between the ultrafiltration membrane layer and the mating cavity.

[0008] A second porous substrate layer is added between the ultrafiltration membrane layer and the mating cavity. This layer can play a role in equalizing and buffering the water flow before it enters the ultrafiltration membrane from the activated carbon section, while also supporting the ultrafiltration membrane layer to prevent it from deforming under pressure. This makes the filtration transition smoother, the water flow distribution more uniform, reduces local resistance and the risk of membrane clogging, and further improves the overall filtration stability.

[0009] As a further embodiment of this utility model: a first base is provided on the end wall of the secondary filter element near the opening of the mating cavity, and a second base is provided on the end wall of the secondary filter element near the closed end of the mating cavity. The first base and the second base are connected by a sealing bracket.

[0010] By setting a first base and a second base at each end of the mating cavity and connecting them with a sealing bracket, a robust encapsulation support frame is formed. This structure increases the overall installation strength of the secondary filter element and allows it to be disassembled and installed separately as a modular component, ensuring stable sealing and assembly precision inside the filter element. This facilitates independent replacement or maintenance of the secondary filter element and reduces maintenance costs.

[0011] As a further embodiment of this utility model: the inner ring surface of the first base is provided with a sealing ring that can contact the corresponding activated carbon filter element.

[0012] A sealing ring is provided on the inner ring surface of the first base, which can fit tightly against the outer wall of the activated carbon filter rod to prevent water filtered by the activated carbon layer from leaking from the mating surface, thus achieving effective sealing and partitioning between the primary and secondary filter elements.

[0013] As a further embodiment of this utility model: the shape of the mating cavity is a regular hexagon, and the outer shape of the activated carbon filter rod is a regular hexagon that is compatible with the mating cavity.

[0014] The cross-section of the cavity and activated carbon filter rods adopts a regular hexagonal design, which can be closely arranged, reduce ineffective gap space, increase the arrangement density of activated carbon filter rods per unit volume, and at the same time have good resistance to deformation under pressure, improving the utilization rate of filtration area and structural stability.

[0015] As a further embodiment of this utility model, it also includes a first base and a second base, with the first-stage filter element cooperating with the first base and the second-stage filter element cooperating with the second base, and a threaded connecting sleeve provided between the first base and the second base.

[0016] By setting a first base and a second base, and connecting them with a threaded connecting sleeve, a separate, detachable structure for the primary and secondary filter elements is achieved. Both filter elements can be replaced or cleaned independently. During assembly, the threaded connection forms a sealed whole, facilitating segmented maintenance and quick replacement of the filter elements, avoiding the scrapping of the entire element, and reducing operating costs.

[0017] As a further embodiment of this utility model: a sealing gasket is provided on the first base, through which the activated carbon filter rod penetrates and can contact the end face of the secondary filter element.

[0018] This sealing gasket can form a reliable sealing contact between the end faces of the primary and secondary filter elements, preventing water leakage at the connection, ensuring the integrity of the filtration path and the uniqueness of the water flow direction, and further improving the sealing reliability and water quality of the filtration system.

[0019] Another aspect of this utility model provides a water purifier, comprising the above-mentioned filter, including: The booster pump, PO membrane, tee, T33 filter element, and water supply end are connected in sequence to the filter. The tee is connected to a TDS probe.

[0020] After initial filtration through the filter assembly structure, the water undergoes deep filtration through a PO membrane and improves taste with a T33 filter cartridge. Finally, the TDS probe monitors the water quality, achieving a complete purification process from physical adsorption and interception to deep desalination and taste optimization, ensuring clean water, excellent taste, and real-time monitoring.

[0021] As a further embodiment of this utility model: an inlet solenoid valve is provided between the filter and the booster pump, and one output port of the inlet solenoid valve is connected to the water-using end.

[0022] One end of the inlet solenoid valve is connected to the water-using end, and the inlet and supply water paths can be selected according to the operating status. This enables the on / off control of purified water purified by the filter alone and raw water that has passed through the filter and PO membrane for deep purification in sequence, allowing switching according to different water usage needs.

[0023] As a further embodiment of this utility model: the input end of the filter is connected to the water supply end, and a switching valve is provided on the connecting pipeline.

[0024] When the filter fails or is under maintenance, the raw water can be switched to the water outlet directly to meet the water demand during special periods by using the switching valve.

[0025] Compared with the prior art, the beneficial effects of this utility model are as follows: This filter utilizes activated carbon filter rods with water passage chambers, allowing incoming water to fully penetrate the activated carbon along the filter rod's axis. This significantly increases the contact area between the water flow and the activated carbon, improving adsorption efficiency and removal capacity. The mating chamber in the secondary filter cartridge and the activated carbon filter rod employ a nested mating structure, allowing water to flow directly from the activated carbon filter rod into the ultrafiltration membrane coating area, forming a compact flow path and fully utilizing the limited filtration space. This achieves a filtration method with high contact efficiency and low flow resistance, reducing pressure drop and improving overall water flow velocity and filtration efficiency. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this drawing or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this drawing. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the overall structure of the filter; Figure 2 This is a schematic diagram of the overall structure of a water purifier.

[0028] In the diagram: 1. Primary filter element; 11. Activated carbon filter rod; 12. Water passage chamber; 2. Secondary filter element; 21. First porous substrate layer; 22. Ultrafiltration membrane layer; 23. Fitting cavity; 24. Second porous substrate layer; 25. First base; 26. Second base; 27. Sealing bracket; 28. Sealing ring; 31. First base; 32. Second base; 33. Threaded connecting sleeve; 34. Sealing gasket; 4. Booster pump; 5. PO membrane; 6. Tee; 7. T33 filter element; 8. Water supply end; 9. TDS probe; 101. Inlet solenoid valve; 102. Switching valve. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this application clearer, the application is described and illustrated below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application without inventive effort are within the scope of protection of this application.

[0030] Obviously, the accompanying drawings described below are merely some examples or embodiments of this application. Those skilled in the art can apply this application to other similar scenarios based on these drawings without any inventive effort. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this application, any changes to design, manufacturing, or production based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient disclosure of the content of this application.

[0031] However, there may be instances where unnecessary detailed descriptions are omitted. For example, detailed descriptions of well-known matters or repetitive descriptions of essentially the same structures may be omitted. This is to avoid unnecessarily lengthy descriptions and to facilitate understanding by those skilled in the art. Furthermore, the accompanying drawings and the following description are provided to enable those skilled in the art to fully understand this application and are not intended to limit the subject matter of the claims.

[0032] Please see Figure 1 As shown in the embodiment of this utility model, a filter and water purifier include a primary filter element 1 and a secondary filter element 2. The primary filter element 1 includes a plurality of activated carbon filter rods 11, one end of which extends inward to form a water passage cavity 12. The secondary filter element 2 includes a first porous substrate layer 21 and an ultrafiltration membrane layer 22. The first porous substrate layer 21 has a plurality of mating cavities 23 that can be sleeved with corresponding activated carbon filter rods 11. The ultrafiltration membrane layer 22 is arranged along the sidewall of the first porous substrate layer 21 located in the area of ​​the mating cavity 23. The opening of the water passage cavity 12 faces the end of the activated carbon filter rod 11 away from the secondary filter element 2.

[0033] After water enters the water passage chamber 12, it permeates from the inside out through the porous structure of the activated carbon filter rod 11. During this process, the pores of the activated carbon adsorb residual chlorine, organic matter, odors, color ions, etc. in the water. Because the water passage chamber 12 provides an internal through-channel, the water flow is continuously distributed axially and uniformly permeates radially inside the activated carbon filter rod 11, avoiding the problem of surface adsorption saturation caused by water only flowing over the outer surface.

[0034] Water purified by activated carbon adsorption flows from the outer wall of the activated carbon filter rod 11 to the mating cavity 23 area of ​​the secondary filter element 2. The mating cavity 23 here is tightly fitted with the activated carbon filter rod 11, forming a directional flow path, preventing water leakage or sideflow between filter elements. Water flows from the mating cavity 23 into the space covered by the ultrafiltration membrane layer 22. This effectively traps tiny impurities such as bacteria, colloids, and suspended particles. Simultaneously, the first porous substrate layer 21 provides support and diversion, ensuring the fluid passes evenly through the membrane surface and is discharged outwards, preventing localized clogging.

[0035] A second porous substrate layer 24 is disposed between the ultrafiltration membrane layer 22 and the mating cavity 23. Ultrafiltration membranes are typically thin and easily deformed or locally bent under pressure. The second porous substrate layer 24 provides mechanical support, preventing local collapse or stretching of the membrane when flow rate or operating pressure fluctuates, coping with transient pressure peaks, and reducing the risk of membrane rupture. This support layer also prevents the membrane from being clamped into hard contact surfaces during assembly, improving sealing consistency.

[0036] In one specific embodiment, the first porous substrate layer 21 may be made of the following materials: hydrophilic polypropylene nonwoven fabric, hydrophilic treated polyester nonwoven fabric, sintered polypropylene or polyethylene porous support plate, polytetrafluoroethylene sintered mesh, ceramic porous plate, etc., with a pore size range of 0.1μm-500μm and a porosity of 50%-70%.

[0037] In one specific embodiment, the second porous substrate layer 24 may be made of the following materials: hydrophilic polypropylene nonwoven fabric, hydrophilic treated polyester nonwoven fabric, sintered polypropylene or polyethylene porous support plate, polytetrafluoroethylene sintered mesh, ceramic porous plate, etc., with a pore size range of 0.1μm-500μm and a porosity of 50%-70%.

[0038] The ultrafiltration membrane layer 22 and the porous substrate are flexible or semi-rigid structures. If the filter media is stacked on its own, it is easy to deform under high-pressure filtration and leakage may occur. The first base 25, the second base 26 and the sealing bracket 27 together form a rigid support frame, which maintains the stable shape of the mating cavity 23 under the action of external force and internal fluid pressure, and prevents the ultrafiltration membrane layer 22 from bulging, collapsing or shifting.

[0039] The filter also includes a first base 31 and a second base 32, with the primary filter element 1 cooperating with the first base 31 and the secondary filter element 2 cooperating with the second base 32.

[0040] The first base 25 is located at the open end and can be connected to the second base 32 to form a sealed interface. The second base 26 is located at the end of the mating cavity 23 to prevent unfiltered raw water from bypassing and leaking, or to prevent filtered clean water from flowing back. After the sealing bracket 27 connects the two bases, the secondary filter element 2 becomes a sealed filter cartridge unit, forming a complete water flow channel to ensure the uniqueness of the filtration direction and path.

[0041] In one embodiment, the mating cavity 23 is hexagonal in shape. The edge-sealing bracket 27 consists of multiple strip-shaped supports, each of which fits along the corner of the hexagon, forming a multi-faceted water-passing area in the selected region.

[0042] It should be further explained that the shape of the cavity 23, through the regular hexagon, forms a honeycomb structure in the first porous substrate layer 21, creating uniform flow channel gaps between adjacent filter rod surfaces, resulting in a more uniform flow field distribution when water flows through. If cylindrical filter rods are used, the uneven gaps after arrangement can easily form dead zones or bypass flow, leading to insufficient local adsorption.

[0043] Furthermore, a threaded connecting sleeve 33 is provided between the first base 31 and the second base 32. During filter element assembly, the primary filter element 1 and the secondary filter element 2 are respectively installed on the corresponding first base 31 and second base 32. Then, the two bases are tightened by screwing the threaded connecting sleeve 33, so that the two parts of the filter element are pressed and fixed in the axial direction. The tightening process of the threaded pair puts pressure on the sealing element on the end face of the base, achieving a sealed fit, thereby forming an integral sealed filter element assembly. When the filter element needs to be cleaned or replaced, the user can directly loosen the threaded connecting sleeve 33 to separate the primary filter element 1 and the secondary filter element 2. Since the two parts are designed separately, the user can replace or clean only one part of the filter element without scrapping the whole thing. This structure facilitates disassembly and maintenance, shortens the replacement cycle, and reduces the cost of use and maintenance.

[0044] Since the primary filter element 1 and the secondary filter element 2 are separate structures, and the first base 31 and the second base 32 are separate structures, if the joint between the two filter elements is not sealed, some of the water that has been pre-filtered by activated carbon may leak or flow out through the joint gaps without passing through the ultrafiltration membrane layer 22, and then leak from the joint between the first base 31 and the second base 32.

[0045] Therefore, the sealing ring 28 forms an annular fit seal between the inner ring surface of the first base 25 and the outer wall of the activated carbon filter rod 11, effectively separating the flow channels of the primary filter element 1 and the secondary filter element 2, ensuring that all water flows through the two stages of filtration in sequence according to the predetermined path.

[0046] In one specific embodiment, the sealing ring 28 is made of an elastic material, such as silicone, rubber or EPDM, which has the ability to rebound and compensate for its flexibility, and can automatically fill tiny gaps to maintain continuous contact between the sealing surfaces.

[0047] A sealing gasket 34, penetrated by the activated carbon filter rod 11 and capable of contacting the end face of the secondary filter element 2, is provided on the first base 31, further forming a reliable sealed contact interface at the connection between the primary filter element 1 and the secondary filter element 2. When the filter element assembly is installed in place, the sealing gasket 34 undergoes elastic deformation under the action of end face clamping force, filling the tiny gap between the end faces of the two filter elements, thereby blocking the possibility of unfiltered water leaking through the connection.

[0048] In an additional embodiment, the filter comprises a multi-stage filter element, including a pre-coarse filter element, a primary ultrafiltration filter element, a secondary pre-sintered activated carbon filter element, a tertiary reverse osmosis membrane filter element, a quaternary post-sintered activated carbon filter element, and a quinary multi-functional mineralization filter element, for a total of six stages.

[0049] Please see Figure 1 and Figure 2As shown, another aspect of this utility model provides a water purifier, including a booster pump 4, a PO membrane 5, a three-way valve 6, a T33 filter element 7 and a water supply end 8, which are connected in sequence to the filter. The three-way valve 6 is connected to a TDS probe 9.

[0050] The front-end filter is used to remove silt, residual chlorine, organic matter and large particles, reduce fouling of the back-end membrane, slow down scaling and clogging, protect the high-precision PO membrane, extend its life and maintain stable flux.

[0051] The booster pump 4 provides the required operating pressure to the downstream PO membrane 5, providing a higher pressure differential to drive the permeate flow.

[0052] PO membrane 5 plays a crucial role in deep removal, such as dissolved ions, small organic molecules, bacteria, and viruses, producing purified water and concentrated wastewater. The concentrated wastewater is discharged from another channel.

[0053] The three-way valve 6 is used to distribute the flow path on the PO membrane 5 outlet side. The TDS probe 9 measures the conductivity or total dissolved solids of the outlet water and sends real-time water quality information back to the control logic. When the TDS exceeds the set threshold, the system can trigger a shutdown, flushing, or switch the outlet water to a bypass (for non-potable use) to ensure water safety and protect the membrane elements.

[0054] The T33 filter cartridge 7 is used for end polishing of the water flow, which can adsorb residual odors and trace organic matter, improve taste, remove residual chlorine and odor, and is often used as the final water output stage.

[0055] The system's inlet water is divided into two paths after passing through the filter. One path leads directly to the water outlet 8 for general daily purified water (such as for washing vegetables and hands); the other path passes sequentially through the booster pump 4, PO membrane 5, T-junction 6, and T33 filter element 7, finally entering the water outlet 8 for drinking or high-quality water. The inlet solenoid valve 101 is located at the key node between these two paths and can select to open or close the corresponding channel according to the control signal.

[0056] In one specific embodiment, a one-way valve is provided between the PO membrane 5 and the three-way valve. The filter's inlet is connected to the water outlet 8, and a switching valve 102 is installed on the connecting pipeline. When the filter is in normal filtration mode, the switching valve 102 is in the closed position. Raw water enters the filter from the inlet 8, flows out after being adsorbed by activated carbon and filtered by an ultrafiltration membrane, and then enters the subsequent purification components before finally being output to the water outlet. At this time, all effluent has undergone a complete purification process, and the switching valve 102 does not participate in the fluid channel.

[0057] When filter blockage, saturation, or filter cartridge replacement or system maintenance is detected, the control system or manual operation will open the switching valve 102. After the switching valve 102 is opened, raw water can bypass the filter cartridge and enter the water-using end from the input end through the bypass channel. In this way, although the effluent is not filtered or purified, the system can still provide domestic water (such as for flushing or non-potable purposes) for a short period, ensuring uninterrupted water supply for users during maintenance.

[0058] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A filter, characterized in that, include: The primary filter element (1) includes multiple activated carbon filter rods (11), with one end of each activated carbon filter rod (11) extending inward to form a water passage cavity (12). The secondary filter element (2) includes a first porous substrate layer (21) and an ultrafiltration membrane layer (22). The first porous substrate layer (21) has multiple mating cavities (23) that can be fitted with the corresponding activated carbon filter rod (11). The ultrafiltration membrane layer (22) is arranged along the side wall of the first porous substrate layer (21) in the area of ​​the mating cavity (23). The opening of the water passage cavity (12) faces the end of the activated carbon filter rod (11) away from the secondary filter element (2).

2. A filter according to claim 1, characterized in that, A second porous substrate layer (24) is provided between the ultrafiltration membrane layer (22) and the mating cavity (23).

3. A filter according to claim 2, characterized in that, The secondary filter element (2) is provided with a first base (25) on the end wall near the opening of the mating cavity (23), and a second base (26) is provided on the end wall of the secondary filter element (2) at the closed end of the mating cavity (23). The first base (25) and the second base (26) are connected by a sealing bracket (27).

4. A filter according to claim 3, characterized in that, The inner ring surface of the first base (25) is provided with a sealing ring (28) that can contact the corresponding activated carbon filter rod (11).

5. A filter according to claim 1, characterized in that, The shape of the cavity (23) is a regular hexagon, and the outer shape of the activated carbon filter rod (11) is a regular hexagon that is compatible with the cavity (23).

6. A filter according to claim 1, characterized in that, It also includes a first base (31) and a second base (32), a primary filter element (1) is fitted with the first base (31), a secondary filter element (2) is fitted with the second base (32), and a threaded connecting sleeve (33) is provided between the first base (31) and the second base (32).

7. A filter according to claim 6, characterized in that, A sealing gasket (34) is provided on the first base (31) through which the activated carbon filter rod (11) passes and can contact the end face of the secondary filter element (2).

8. A water purifier, comprising the filter of claim 1, characterized in that, include: The booster pump (4), PO membrane (5), tee (6), T33 filter element (7) and water supply end (8) are connected in sequence to the filter. The tee (6) is connected to the TDS probe (9).

9. A water purifier according to claim 8, characterized in that, An inlet solenoid valve (101) is provided between the filter and the booster pump (4), and one of the output ports of the inlet solenoid valve (101) is connected to the water-using end (8).

10. A water purifier according to claim 9, characterized in that, The filter input is connected to the water supply end (8) and a switching valve (102) is installed on the connecting pipeline.

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