Composite filter element

Abstract

The composite filter element comprises a first filter cavity, a second filter cavity, an upper water distributor, a first water inlet channel and a water outlet channel which are located in a filter bottle, the first filter cavity is used for being filled with granular filter materials, and the upper water distributor comprises a first water distribution disc and a second water distribution disc; the second water distribution disc is communicated with the top end of the first filtering cavity and the top end of the second filtering cavity, the top end of the guide pipe is communicated with the first water distribution disc, and the bottom end of the guide pipe is communicated with the first filtering cavity; by means of the arrangement, raw water is guided to the bottom of the first filtering cavity through the first water distribution disc and the guide pipe, and enters the second water distribution disc above the first filtering cavity after being filtered by the granular filtering materials in the first filtering cavity; the direction of water flowing through the first filtering cavity is from bottom to top, granular filtering materials are scattered, the filtering effect is improved, and the service life of the filtering materials is prolonged.

Description

Technical Field

[0001] This application relates to the field of water filtration technology, and in particular to a composite filter element. Background Technology

[0002] Existing water purifiers generally employ multi-stage filtration with various filter types, such as PP cotton filters, activated carbon filters, ultrafiltration membrane filters, reverse osmosis membrane filters, and ion exchange resin filters. To balance the complementary functions of different filter types and the miniaturization of the water purifier, current technology typically integrates several different filter types into a single filter, forming a composite filter. This achieves multiple filtration functions, improves filtration efficiency, and integrates multiple filter material layers into a single unit, resulting in a compact size and flexible layout. Among these composite filters, the use of ion exchange resin filters removes calcium, magnesium, and heavy metal ions (such as lead and copper) from the water through ion exchange reactions, thereby softening the water and removing harmful ions. This is suitable for hard water areas or scenarios with high water quality requirements.

[0003] In current composite filter cartridges, water typically flows from top to bottom. Since the resin in ion exchange resin filter cartridges usually exists in granular form, the granular resin filter media is gradually compressed into sticky lumps under the pressure of the water flow, which prevents it from fully contacting the water, resulting in poor filter media performance and short lifespan.

[0004] Furthermore, although some composite filter cartridges currently have pH adjustment functions, they can usually only adjust and maintain the pH value at a fixed value, and cannot flexibly adjust the pH value according to different user needs.

[0005] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0006] In view of this, the present application aims to provide a composite filter element that can provide water flow from bottom to top, which is beneficial to dispersing granular resin filter media, improving filtration effect, extending the service life of filter media, and achieving flexible adjustment of pH value through a simple structure.

[0007] In a first aspect, embodiments of this application provide a composite filter element, comprising:

[0008] A filter bottle, the interior of which has a first filter chamber and a second filter chamber separated from each other, the first filter chamber and the second filter chamber extending along the height direction of the filter bottle, the first filter chamber being used to fill particulate filter media;

[0009] An upper water distributor is disposed inside the filter bottle, with the first filter chamber and the second filter chamber located below the upper water distributor; the upper water distributor includes a first water distribution plate and a second water distribution plate, with the second water distribution plate respectively connected to the top of the first filter chamber and the top of the second filter chamber;

[0010] The conduit has its top end connected to the first water distribution plate and its bottom end connected to the bottom end of the first filter chamber.

[0011] A first inlet channel and an outlet channel are connected. The first inlet channel is connected to the first water distribution plate, and the second filter chamber is connected to the outlet channel, thereby forming a first flow path that flows sequentially through the first inlet channel, the first water distribution plate, the conduit, the first filter chamber, the second water distribution plate, the second filter chamber, and the outlet channel.

[0012] This application sets up two water distribution plates and two filter chambers, with the top of the conduit connected to the first water distribution plate and the bottom connected to the first filter chamber. The first inlet and outlet channels are also connected to each water distribution plate and filter chamber. This arrangement allows raw water to flow into the conduit through the first water distribution plate. Based on the connection between the conduit and the first filter chamber, the raw water can be directly guided to the bottom of the first filter chamber. The water to be filtered flows from top to bottom through the granular filter media in the first filter chamber and then enters the second water distribution plate above the first filter chamber. This arrangement allows the water to simultaneously disperse the granular filter media during filtration, continuously renewing the contact surface and ensuring full contact with the water, thus improving the filtration effect and extending the service life of the filter media.

[0013] In conjunction with the first aspect of this application, in an optional embodiment, a filter cartridge holder assembly is included, disposed above the filter bottle, and the first water inlet channel and the water outlet channel are disposed on the filter cartridge holder assembly.

[0014] By placing the filter cartridge holder assembly above the filter bottle, the first inlet channel, the second inlet channel, and the outlet channel are integrated on the filter cartridge holder assembly, facilitating the placement of the filter cartridge and allowing for easy connection of water pipes from above the filter cartridge, thus simplifying the installation and removal of the filter cartridge. In conjunction with the first aspect of this application, in an optional embodiment, the filter cartridge holder assembly further includes a second inlet channel, which is connected to the second water distribution plate, thereby forming a second flow path that sequentially flows through the second inlet channel, the second water distribution plate, the second filter chamber, and the outlet channel; the composite filter cartridge also includes a proportional regulating valve, which is located upstream of the filter cartridge holder assembly, and is used to regulate the proportion of raw water entering the first inlet channel and the second inlet channel respectively.

[0015] By dividing the raw water into two flow paths, the water distribution ratio between the two flow paths can be adjusted by a proportional regulating valve, thereby flexibly adjusting the pH value to meet different user needs. The adjustment structure is simple and the adjustment method is convenient.

[0016] In conjunction with the first aspect of this application, in an optional embodiment, the conduit is located within the first filter chamber, and the conduit extends downward to the bottom end of the first filter chamber. By directly placing the conduit within the first filter chamber, the connection and installation of the conduit are facilitated, which helps to simplify the overall structure of the filter element and reduce its volume.

[0017] In conjunction with the first aspect of this application, in an optional embodiment, the first water distribution plate is located above the second water distribution plate, the first water distribution plate and the second water distribution plate abut against each other, a first water-containing space is formed between the first water distribution plate and the inner wall of the filter bottle, and a second water-containing space is formed between the first water distribution plate and the second water distribution plate. Through the reasonable arrangement of the positions of the two water distribution plates and the first and second water-containing spaces, a simple structure can be used to smoothly divide the raw water into two flow paths. Positioning the second water distribution plate below allows the water filtered by the first filtration chamber to easily enter the second water distribution plate, and facilitates the subsequent convergence of the two flow paths within the second filtration chamber.

[0018] In conjunction with the first aspect of this application, in an optional embodiment, the first water distribution plate has a first water distribution hole communicating with the conduit; the second water distribution plate has a second water distribution hole communicating with the first filter chamber and a third water distribution hole communicating with the second filter chamber, wherein there are a plurality of second and third water distribution holes arranged at intervals along the circumference of the second water distribution plate. By setting the first, second, and third water distribution holes, the communication between the first and second water distribution plates and the first and second filter chambers is achieved without a complex structure, resulting in a simple structure and ease of manufacturing.

[0019] In conjunction with the first aspect of this application, in an optional embodiment, a lower water distributor is further included within the filter bottle, the lower water distributor being located at the bottom end of the first filter chamber and the second filter chamber; the lower water distributor has a fourth water distribution hole communicating with the conduit, and a fifth water distribution hole communicating with the first filter chamber, the fifth water distribution holes being a plurality of holes arranged at intervals along the circumference of the lower water distributor. By providing the lower water distributor, it can effectively fit against the inner wall of the filter bottle, and combined with the upper water distributor, a closed flow path is formed inside the filter element, facilitating assembly and effectively preventing leakage.

[0020] In conjunction with the first aspect of this application, in an optional embodiment, the first filter chamber surrounds the outside of the second filter chamber, a spacer is provided inside the filter bottle, the spacer is disposed below the second water distribution plate, the first filter chamber is located between the spacer and the filter bottle, and the inner cavity of the spacer forms the second filter chamber. The spacer effectively separates the first and second filter chambers inside the filter bottle and provides support for the upper water distributor, facilitating the assembly of the filter element components.

[0021] In conjunction with the first aspect of this application, in an optional embodiment, the second filtration chamber includes a first accommodating region located above and a second accommodating region located below. The first accommodating region is used to accommodate an ultrafiltration membrane assembly, and the second accommodating region is used to accommodate activated carbon filter media. By dividing the second filtration chamber into a first accommodating region and a second accommodating region, with the ultrafiltration membrane assembly placed in the first accommodating region and the activated carbon filter media placed in the second accommodating region, more types of filter media can be accommodated, achieving multiple filtration and improving the filtration effect.

[0022] In conjunction with the first aspect of this application, in an optional embodiment, a separator is provided between the first accommodating area and the second accommodating area. The second water distribution plate, the ultrafiltration membrane assembly, the separator, and the spacer together form a flow channel from the second water distribution plate to the second accommodating area. A water outlet is provided in the middle of the separator, and the second accommodating area and the ultrafiltration membrane assembly are connected through the water outlet. By setting the separator, the first accommodating area and the second accommodating area are separated, and the ultrafiltration membrane assembly can be supported. By setting the flow channel and the water outlet, the second water distribution plate and the second filtration chamber are connected, so that the water in the second water distribution plate first enters the activated carbon filter material below through the flow channel for filtration, and then enters the ultrafiltration membrane assembly above through the water outlet for final filtration. At the same time, an upward water flow is formed in the second filtration chamber, which facilitates the filtered water to enter the upper water outlet channel, simplifying the flow path.

[0023] In conjunction with the first aspect of this application, in an optional embodiment, the ultrafiltration membrane module employs ultrafiltration membrane fibers, which are encapsulated using polyethersulfone or polyetheramide after being drawn into fibers. This configuration enables high-precision physical interception, with a pore size of approximately 0.01 micrometers, removing microplastics, microorganisms, viruses, etc., thereby improving the purification effect.

[0024] The composite filter element provided in this application embodiment features two water distribution plates and two filter chambers. The top end of the conduit is connected to the first water distribution plate, and the bottom end is connected to the first filter chamber. The first inlet and outlet channels are also connected to each water distribution plate and filter chamber. This configuration allows raw water to flow into the conduit through the first water distribution plate. Based on the connection between the conduit and the first filter chamber, the raw water can be directly guided to the bottom of the first filter chamber. The water to be filtered flows from top to bottom through the granular filter media in the first filter chamber and then enters the second water distribution plate above the first filter chamber. This configuration allows the water to simultaneously disperse the granular filter media during filtration, continuously renewing the contact surface and ensuring full contact with the water, thus improving the filtration effect and extending the service life of the filter media.

[0025] The composite filter element provided in this application embodiment forms two flow paths by setting a first water distribution plate and a second water distribution plate, and a first water inlet channel and a second water inlet channel corresponding to the first water distribution plate and the second water distribution plate, respectively. The water in the first flow path flows into the second filter chamber through the second water distribution plate after being filtered by the first filter chamber. The water in the second flow path flows directly into the second filter chamber through the second water distribution plate. The water in the first flow path and the water in the second flow path flow together into the second filter chamber and are discharged after being filtered by the filter media in the second filter chamber. The water distribution ratio of the two flow paths can be adjusted by a proportional regulating valve, thereby flexibly adjusting the pH value to meet different user needs. The adjustment structure is simple and the adjustment method is convenient.

[0026] The composite filter element provided in this application embodiment facilitates the placement of the filter element by placing the filter element seat assembly above the filter bottle and integrating the first water inlet channel, the second water inlet channel, and the water outlet channel on the filter element seat assembly, and makes it easy to connect the water pipe from above the filter element, thereby facilitating the installation and removal of the filter element.

[0027] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 A first-view cross-sectional schematic diagram of the composite filter element provided in an embodiment of this application;

[0030] Figure 2 A cross-sectional schematic diagram from a second perspective of the composite filter element provided in an embodiment of this application;

[0031] Figure 3 for Figure 1 Enlarged view of point A in the middle;

[0032] Figure 4 for Figure 1 Enlarged view of point B in the middle;

[0033] Figure 5 for Figure 2 Enlarged view of point C in the middle;

[0034] Figure 6 for Figure 2 Enlarged view of point D in the middle;

[0035] Figure 7 Exploded view of the main components of the composite filter element provided in the embodiments of this application;

[0036] Figure 8 A schematic diagram showing the combination of the first water distribution plate, the second water distribution plate, the conduit, the ultrafiltration membrane assembly, the activated carbon filter element, and the lower water distributor provided in the embodiments of this application;

[0037] Figure 9 This is a schematic diagram showing the cooperation of the first water distribution plate, the second water distribution plate, the conduit, the ultrafiltration membrane assembly, the septum, and the lower water distributor of the composite filter element provided in the embodiments of this application.

[0038] Figure label:

[0039] 1. Filter bottle; 11. First filter chamber; 12. Second filter chamber; 121. First receiving area; 122. Second receiving area; 123. Divider; 1231. Water outlet; 1232. Seventh sealing ring; 1233. Third PP cotton partition;

[0040] 2. Upper water distributor; 21. First water distribution plate; 211. First water distribution hole; 212. First extension; 213. Second extension; 214. Fourth sealing ring; 22. Second water distribution plate; 221. Second water distribution hole; 222. Third water distribution hole; 223. Water outlet pipe; 224. Fourth extension; 225. First sealing ring; 226. Third sealing ring;

[0041] 3. Catheter;

[0042] 4. Filter cartridge assembly; 41. First water inlet channel; 411. First water inlet; 42. Second water inlet channel; 421. Second water inlet; 43. Water outlet channel;

[0043] 5. Spacer sleeve; 51. Flow channel; 52. First PP cotton partition;

[0044] 6. Ultrafiltration membrane module; 61. First support flange; 62. Second support flange;

[0045] 7. Activated carbon filter media;

[0046] 8. Lower water distributor; 81. Fourth water distribution hole; 82. Fifth water distribution hole; 83. Third extension; 84. Fifth sealing ring; 85. Second PP cotton partition;

[0047] 9. Filter bottle cap;

[0048] 10. Decorative cap for filter bottle. Detailed Implementation

[0049] To make the technical solution and beneficial effects of this utility model more apparent and understandable, a detailed description is provided below by listing specific embodiments. The accompanying drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meanings as those in the technical field to which this application pertains.

[0050] In the description of this utility model, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "height", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of simplifying the description of this utility model and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. In other words, they should not be construed as limitations on this utility model.

[0051] In this utility model, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating the relative importance of the indicated features or the number of indicated technical features. Therefore, a feature specified as "first" or "second" can explicitly indicate that at least one of those features is included. In the description of this utility model, "multiple" means at least two, such as two, three, etc.; "several" means at least one, such as one, two, three, etc., unless otherwise explicitly specified.

[0052] In this utility model, unless otherwise explicitly defined, the terms "installation," "connection," "linking," "fixing," and "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0053] In this utility model, unless otherwise explicitly defined, the terms "above," "on top of," "above," "over," "below," "below," "below," or "below" for "first feature above second feature" can refer to direct contact between the first and second features, or indirect contact between the first and second features through an intermediate medium. Furthermore, "above," "above," and "over" for "first feature above second feature" can mean the first feature is directly above or diagonally above the second feature, or simply indicates that the horizontal height of the first feature is higher than the horizontal height of the second feature. Similarly, "below," "below," and "below" for "first feature below second feature" can mean the first feature is directly below or diagonally below the second feature, or simply indicates that the horizontal height of the first feature is lower than the horizontal height of the second feature.

[0054] This disclosure provides an embodiment of a composite filter element, such as... Figures 1 to 9 As shown, the composite filter element includes, from top to bottom, a filter element seat assembly 4, a filter bottle 1, a filter bottle cap 9, and a filter bottle decorative cap 10. The filter bottle 1 is a hollow column with a first opening at the top and a second opening at the bottom. The filter element seat assembly 4 is installed above the filter bottle 1 and covers the first opening of the filter bottle 1. The filter bottle cap 9 is installed below the filter bottle 1 to seal the second opening of the filter bottle 1. The filter bottle decorative cap 10 is installed below the filter bottle cap 9 to serve a decorative and aesthetic purpose.

[0055] Filter bottle 1 is mainly used to accommodate various filter media and arrange the flow channels, such as Figures 1-2 , Figure 9As shown, the interior of the filter bottle 1 includes components such as an upper water distributor 2, a lower water distributor 8, and a spacer 5. The upper water distributor 2 is located on the top side of the internal space of the filter bottle 1, and the lower water distributor 8 is located at the bottom of the internal space of the filter bottle 1. The space between the upper water distributor 2 and the lower water distributor 8 forms a filtration chamber. A spacer 5 is provided between the upper water distributor 2 and the lower water distributor 8. The filtration chamber is divided into a first filtration chamber 11 and a second filtration chamber 12 by the spacer 5. The first filtration chamber 11 and the second filtration chamber 12 extend along the height direction of the filter bottle 1, respectively. Specifically, in the filtration chamber between the upper water distributor 2 and the lower water distributor 8, the first filtration chamber 11 surrounds the outside of the second filtration chamber 12. The spacer 5 and the filter bottle 1 form the first filtration chamber 11, and the inner cavity enclosed by the spacer 5 forms the second filtration chamber 12. The spacer 5 can also support the upper water distributor 2, which facilitates the assembly of the filter element components. The first filtration chamber 11 is filled with granular filter media, such as granular resin filter media. By using an ion exchange resin filter cartridge in the composite filter cartridge, calcium, magnesium ions, and heavy metal ions (such as lead and copper) in the water can be removed through ion exchange reactions, thereby softening the water and removing harmful ions. This is suitable for hard water areas or scenarios with high water quality requirements. However, the water flow in current composite filter cartridges is usually from top to bottom. Since the resin in the ion exchange resin filter cartridge is usually in granular form, the granular resin filter media is gradually compressed into sticky lumps under the pressure of the water flow, which cannot fully contact the water, resulting in poor filter media performance and short lifespan. Furthermore, although some composite filter cartridges have pH adjustment functions, they can usually only adjust and maintain the pH value at a fixed value, and cannot flexibly adjust the pH value according to different user needs. In addition, due to unreasonable flow path arrangement, there is a problem of inconvenient filter cartridge installation.

[0056] Therefore, the composite filter element of the present disclosure embodiment, such as Figures 1-6 As shown, the first filter chamber 11 and the second filter chamber 12 are located below the upper water distributor 2. The upper water distributor 2 includes a first water distribution plate 21 and a second water distribution plate 22. The second water distribution plate 22 is connected to the top end of the first filter chamber 11 and the top end of the second filter chamber 12, respectively. The composite filter element of this embodiment also includes a guide tube 3. The top end of the guide tube 3 is connected to the first water distribution plate 21, and the bottom end of the guide tube 3 is connected to the first filter chamber 11. The composite filter element of this embodiment also includes a first water inlet channel 41 and a water outlet channel 43. The first water inlet channel 41 is connected to the first water distribution plate 21, and the second filter chamber 12 is connected to the water outlet channel 43, thereby forming a first flow path that flows sequentially through the first water inlet channel 41, the first water distribution plate 21, the guide tube 3, the first filter chamber 11, the second water distribution plate 22, the second filter chamber 12, and the water outlet channel 43. The path of the first flow path can be found in [reference needed]. Figure 1 , Figures 3-4 The arrow in the diagram illustrates this.

[0057] Specifically, by setting up a first water distribution plate 21 and a second water distribution plate 22, raw water flows into the conduit 3 through the first water distribution plate 21. Since the conduit 3 is connected to the bottom of the first filter chamber 11, the raw water is directly guided to the bottom of the first filter chamber 11. After being filtered by the granular resin filter material in the first filter chamber 11, it enters the second water distribution plate 22 above the first filter chamber 11. The second water distribution plate 22 is connected to both the first filter chamber 11 and the second filter chamber 12. The water entering the second water distribution plate 22 from the first filter chamber 11 further flows into the second filter chamber 12 for filtration and finally flows out through the water outlet channel 43. Therefore, this application, by setting up two water distribution plates and two filter chambers, and configuring the top end of the conduit to communicate with the first water distribution plate and the bottom end to communicate with the first filter chamber, as well as the communication relationship between the first water inlet channel and the water outlet channel and each water distribution plate and each filter chamber, allows raw water to flow into the conduit through the first water distribution plate. Based on the communication relationship between the conduit and the first filter chamber, the raw water can be directly guided to the bottom of the first filter chamber through the conduit. The water to be filtered flows from top to bottom through the granular filter media in the first filter chamber and then enters the second water distribution plate above the first filter chamber. This configuration allows the granular filter media to be dispersed during the process of water flowing through it. At the same time, the granular filter media continuously renews its contact surface, making full contact with the water, improving the filtration effect, and extending the service life of the filter media.

[0058] The composite filter element of this disclosure embodiment, such as Figure 3 , Figure 5 As shown, both the first inlet channel 41 and the outlet channel 43 are disposed on the filter element holder assembly 4. The filter element holder assembly 4 also includes a second inlet channel 42, which is connected to the second water distribution plate 22, thereby forming a second flow path through which water flows sequentially through the second inlet channel 42, the second water distribution plate 22, the second filter chamber 12, and the outlet channel 43. The path of the second flow path can be seen in [reference needed]. Figure 2 , Figures 5-6 The arrow in the diagram illustrates this.

[0059] In this embodiment of the composite filter element, the filter element seat assembly 4 is disposed above the filter bottle 1, and the first water inlet channel 41, the second water inlet channel 42 and the water outlet channel 43 are integrated on the filter element seat assembly 4, which facilitates the placement of the filter element and makes it easy to connect the water pipe from the top of the filter element, thereby facilitating the installation and disassembly of the filter element.

[0060] Furthermore, by dividing the raw water into two flow paths, the water in the first flow path is filtered through the first filter chamber 11 and then merges with the water in the second flow path in the second filter chamber 12. The water in the first flow path is simultaneously filtered by the filter media in the first filter chamber 11 and the second filter chamber 12, while the water in the second flow path is only filtered by the filter media in the second filter chamber 12. The granular resin filter media in the first filter chamber 11 has the function of adjusting the pH value, thereby changing the pH value of the raw water.

[0061] Based on this, the composite filter element also includes a proportional control valve (not shown). The proportional control valve is located upstream of the filter element housing assembly 4 and is used to adjust the ratio of raw water entering the first inlet channel 41 and the second inlet channel 42 respectively. Specifically, the inlet of the proportional control valve is connected to tap water, and the outlet of the proportional control valve is divided into two paths: one path connects to the first inlet channel 41, and the other path connects to the second inlet channel 42. The water distribution ratio of the two flow paths can be adjusted by the proportional control valve. Compared with the prior art, this application can flexibly adjust the pH value to meet different user needs, and the adjustment structure is simple and the adjustment method is convenient.

[0062] like Figure 1-2 As shown, the first water inlet channel 41 includes a first water inlet 411, and the second water inlet channel 42 includes a second water inlet 421. The first water inlet 411 and the second water inlet 421 extend outward from the filter element seat assembly 4 to facilitate connection to external pipelines.

[0063] In some alternative embodiments, such as Figure 3 , Figure 5 As shown, the first water distribution plate 21 is located above the second water distribution plate 22. The first water distribution plate 21 and the second water distribution plate 22 abut against each other. A first water-holding space is formed between the first water distribution plate 21 and the inner wall of the filter bottle 1, and a second water-holding space is formed between the first water distribution plate 21 and the second water distribution plate 22. Specifically, the outer periphery of the upper water distributor 2 is in contact with the inner wall of the filter bottle 1, and there is a certain gap between the first water distributor plate 21 and the inner top wall of the filter bottle 1. The first water distributor plate 21, the inner top wall of the filter bottle 1, and the inner wall of the filter bottle 1 form a first water-containing space. The second water distributor plate 22 has an inwardly recessed cavity. The first water distributor plate 21 and the second water distributor plate 22 are respectively provided with mutually cooperating abutting structures. The first water distributor plate 21 abuts against the second water distributor plate 22, thereby forming a second water-containing space between the first water distributor plate 21 and the second water distributor plate 22. After the water from the first flow path flows into the first water-containing space, it flows into the first filter chamber 11 through the conduit 3. After the water from the first flow path flows out of the first filter chamber 11, it enters the second water-containing space. After merging with the second flow path in the second water-containing space, it enters the second filter chamber 12. By rationally positioning the two water distribution plates and arranging the first and second water storage spaces, a simple structure can be used to smoothly divide the raw water into two flow paths. The second water distribution plate 22 is positioned at the bottom so that the water filtered by the first filter chamber 11 can easily enter the second water distribution plate 22, and facilitate the subsequent convergence of the two flow paths in the second filter chamber 12.

[0064] In some alternative embodiments, such as Figure 3 , Figure 5As shown, the outer periphery of the second water distribution plate 22 is fitted with a first sealing ring 225 that mates with the inner wall of the filter bottle 1 to prevent water from the upper water distributor 2 from leaking into the first filter chamber 11 and affecting the filtration effect. In other optional embodiments, in order to prevent leakage between the first water holding space and the second water holding space, a second sealing ring (not shown) that mates with the inner wall of the filter bottle 1 can also be fitted with the outer periphery of the first water distribution plate 21, or a sealing structure can be provided on the contact surface between the first water distribution plate 21 and the second water distribution plate 22.

[0065] In some alternative embodiments, such as Figure 3 , Figures 8-9 As shown, the first water distribution plate 21 has a first water distribution hole 211 connected to the conduit 3, and the second water distribution plate 22 has a second water distribution hole 221 connected to the first filter chamber 11 and a third water distribution hole 222 connected to the second filter chamber 12. The second water distribution holes 221 and 222 are several in number and arranged at intervals along the circumference of the second water distribution plate 22. Corresponding to the positions of the first filter chamber 11 and the second filter chamber 12, the second water distribution hole 221 is located on the radially outer side of the second water distribution plate 22, and the third water distribution hole 222 is located on the radially inner side of the second water distribution plate 22. By setting the first water distribution hole 211, the second water distribution hole 221, and the third water distribution hole 222, communication between the first water distribution plate 21 and the second water distribution plate 22 and the first filter chamber 11 and the second filter chamber 12 is achieved without a complex structure. The structure is simple and easy to manufacture. Furthermore, several second water distribution holes 221 and third water distribution holes 222 are respectively arranged at intervals along the circumference of the second water distribution plate 22, so that water can flow evenly and quickly from the first filter chamber 11 into the second water distribution plate 22 and from the second water distribution plate 22 into the second filter chamber 12. It should also be noted that, in order to simplify the filter element structure and avoid leakage risks, in this embodiment, only one first water distribution hole 211 and one corresponding conduit 3 are used. Of course, in other alternative embodiments, the number of first water distribution holes 211 and corresponding conduits 3 can be multiple.

[0066] In some alternative embodiments, such as Figure 1 , Figures 3-4 As shown, the conduit 3 is located inside the first filter chamber 11 and extends downward to the bottom of the first filter chamber 11, which facilitates the connection and installation of the conduit 3, simplifies the overall structure of the filter element, and reduces the volume of the filter element.

[0067] Further optional, such as Figure 3As shown, the first water distribution plate 21 has a downwardly extending first extension 212 at the first water distribution hole 211. The first extension 212 cooperates with the top end of the conduit 3. In this embodiment, the first extension 212 is sleeved on the outside of the conduit 3. In other alternative embodiments, the conduit 3 can also be sleeved on the outside of the first extension 212. The first extension 212 passes through the second water distribution plate 22, and a through hole for the first extension 212 to pass through is provided at the corresponding external position of the second water distribution plate 22.

[0068] In some alternative embodiments, such as Figure 3 , Figure 5 As shown, it also includes a water outlet pipe 223, which is located in the middle of the second water distribution plate 22 and extends upward along the second water distribution plate 22. The second filter chamber 12 and the water outlet channel 43 are connected through the water outlet pipe 223. The water outlet pipe 223 serves as a transition connection pipe between the second filter chamber 12 and the filter element seat assembly 4, guiding the finally filtered water into the water outlet channel 43 of the filter element seat assembly 4 for discharge. In this embodiment, the water outlet pipe 223 is integrally formed with the second water distribution plate 22 as part of the second water distribution plate 22. Specifically, the second water distribution plate 22 has an opening in its middle, and the water outlet pipe 223 extends upward along the opening, simplifying the structure and saving parts. In other alternative embodiments, the water outlet pipe 223 can also be formed separately from the second water distribution plate 22. In addition, a second extension 213 corresponding to the water outlet pipe 223 is provided in the middle of the first water distribution plate 21. The second extension 213 extends upward along the first water distribution plate 21 and is hollow in the middle so that the water outlet pipe 223 can pass through. A third sealing ring 226 is provided in the circumference of the water outlet pipe 223, and a fourth sealing ring 214 is provided in the circumference of the second extension 213 to ensure sealing performance and prevent leakage.

[0069] The composite filter element of this disclosure embodiment, such as Figure 4 , Figures 7-9 As shown, a disc-shaped lower distributor 8 is installed inside the filter bottle 1. The lower distributor 8 is located at the bottom of the first filter chamber 11 and the second filter chamber 12, that is, at the bottom of the spacer 5. The spacer 5 is positioned between the upper distributor 2 and the lower distributor 8. The first filter chamber 11 and the second filter chamber 12 are located between the upper distributor 2 and the lower distributor 8. The conduit 3 is disposed between the first distributor disc 21 and the lower distributor 8. The lower distributor 8 has a fourth water distribution hole 81 corresponding to and communicating with the conduit 3, and a fifth water distribution hole 82 communicating with the first filter chamber 11. That is to say, the conduit 3 and the first filter chamber 11 are connected through the lower distributor 8. The lower water distributor 8 is installed on the filter bottle cover 9. The bottom end face of the lower water distributor 8, the inner wall of the filter bottle 1, and the filter bottle cover 9 form a third water-containing space. After the water flows through the conduit 3, it enters the third water-containing space through the fourth water-distribution hole 81, and then enters the first filter chamber 11 through the fifth water-distribution hole 82.

[0070] Furthermore, the lower water distributor 8 has an upwardly extending third extension 83 at the fourth water distribution hole 81. This third extension 83 cooperates with the bottom end of the conduit 3. In this embodiment, the third extension 83 is sleeved outside the conduit 3. In other alternative embodiments, the conduit 3 may also be sleeved outside the third extension 83. Several fifth water distribution holes 82 are arranged at intervals along the circumference of the lower water distributor 8, allowing water to flow evenly and quickly from the conduit 3 into the first filter chamber 11. The upper water distributor 2 is coaxially arranged with the lower water distributor 8. The outer periphery of the lower water distributor 8 is in contact with the inner wall of the filter bottle 1, and a fifth sealing ring 84 is sleeved on the outer periphery of the lower water distributor 8 to cooperate with the inner wall of the filter bottle 1.

[0071] This embodiment forms a closed flow path inside the filter element by setting up an upper water distributor 2, a lower water distributor 8, and a conduit 3. Existing technologies typically use thin-walled baffle structures to fit with the inner wall of the filter bottle 1, which cannot achieve a good seal. Furthermore, the filter bottle 1 has a large diameter and may deform into an elliptical shape during injection molding, making it difficult for the baffle structure to effectively fit and assemble with the filter bottle 1, leading to water leakage. In this embodiment, both the upper water distributor 2 and the lower water distributor 8 can effectively fit with the inner wall of the filter bottle 1 and employ effective sealing methods, making assembly easy and effectively preventing leakage.

[0072] Of course, in other alternative embodiments, the lower water distributor 8 may not be provided, and the bottom end of the conduit 3 may be directly connected to the first filter chamber 11.

[0073] In some alternative embodiments, such as Figures 1-6 As shown, the second filtration chamber 12 includes a first accommodating region 121 located above and a second accommodating region 122 located below. The first accommodating region 121 is used to accommodate the ultrafiltration membrane module 6, and the second accommodating region 122 is used to accommodate the activated carbon filter material 7. Furthermore, the activated carbon filter material 7 includes several activated carbon rods, thereby achieving multiple filtration and improving the filtration effect. In other alternative embodiments, other types of filter materials, such as reverse osmosis membrane filter materials, KDF filter cartridges, mineral filter cartridges, etc., can be selected for the first accommodating region 121 and the second accommodating region 122.

[0074] Furthermore, such as Figure 6 As shown, a separator 123 is provided between the first accommodating area 121 and the second accommodating area 122. The second water distribution plate 22, the ultrafiltration membrane assembly 6, the separator 123 and the spacer 5 together form a flow channel 51 from the second water distribution plate 22 to the second accommodating area 122. A water outlet hole 1231 is provided in the middle of the separator 123. The second accommodating area 122 and the ultrafiltration membrane assembly 6 are connected through the water outlet hole 1231.

[0075] Specifically, by providing a separator 123 within the second filtration chamber 12, a first receiving area 121 and a second receiving area 122 are formed within the second filtration chamber 12. The activated carbon rod within the second receiving area 122 supports the separator 123. Furthermore, the ultrafiltration membrane assembly 6 extends a short section of a first support flange 61 outward in its circumferential direction, and a second support flange 62 extends downward along the first support flange 61. The ultrafiltration membrane assembly 6 is supported on the separator 123 by the second support flange 62. The second water distribution plate 22 has a downwardly extending fourth extension 224, which abuts against the first support flange 61. Thus, the separator 123, the ultrafiltration membrane assembly 6, and the upper water distributor 2 are sequentially supported and installed within the filter element. The second water distribution plate 22, the ultrafiltration membrane assembly 6, the separator 123, and the spacer 5 together form a flow channel 51 leading from the second water distribution plate 22 to the second receiving area 122. That is, water from the second water distribution plate 22 first enters the activated carbon filter material 7 below through the flow channel 51 for filtration, and then enters the ultrafiltration membrane assembly 6 above through the outlet hole 1231 for final filtration. Simultaneously, an upward water flow is formed within the second filtration chamber 12, facilitating the direct flow of filtered water through the outlet pipe 223 into the upper outlet channel 43, simplifying the flow path. The outer periphery of the ultrafiltration membrane assembly 6 is provided with a sixth sealing ring (not shown) that mates with the fourth extension 224 of the second water distribution plate 22, and the outer periphery of the separator 123 is provided with a seventh sealing ring 1232 that mates with the second support flange 62. This ensures the sealing of the ultrafiltration membrane assembly 6, allowing water to flow only through the outlet hole 1231 into the ultrafiltration membrane assembly 6, thus guaranteeing the filtration effect.

[0076] Optionally, the composite filter element has PP cotton separators at multiple locations. For example, a first PP cotton separator 52 is provided on the outer periphery of the separator 5 corresponding to the second water distributor, and a second PP cotton separator 85 is provided at the junction of the bottom of the lower water distributor 8 and the filter bottle cover 9, thereby isolating and adsorbing large particulate impurities. In addition, the separator 123 has a third PP cotton separator 1233 on the side of the water outlet 1231 facing the ultrafiltration membrane assembly 6. The third PP cotton separator 1233 covers the water outlet 1231 and is used to further filter the water after it has been filtered by the activated carbon filter material 7, removing large particulate impurities such as larger molecules of organic matter, which is beneficial to the subsequent filtration of the ultrafiltration membrane assembly 6.

[0077] Optionally, the activated carbon filter material 7 comprises the following components (by weight percentage): 25%-35% of a first carbon matrix, 25%-35% of a second carbon matrix, and 30%-50% of a third carbon matrix; wherein, the first carbon matrix is ​​used to adjust the taste, is not acid-washed, and has an iodine value of 900 or higher; the second carbon matrix is ​​used to remove residual chlorine, and has an iodine value of 1100 or higher; the third carbon matrix is ​​used to remove PFAS (perfluorinated and polyfluoroalkyl substances), and has an iodine value of 1100 or higher and a mesh size of 40-50 mesh; wherein, the iodine value, or iodine adsorption value, refers to the ability of activated carbon to adsorb iodine under specified conditions, expressed as the number of milligrams of iodine adsorbed per gram of activated carbon (mg / g). Preferably, the weight percentage of the first carbon matrix is ​​30%, the weight percentage of the second carbon matrix is ​​30%, and the weight percentage of the third carbon matrix is ​​40%. Optionally, one or more of the first, second, and third carbon matrices can be mixed and arranged in a powdered dispersion or arranged in a block form with intervals, etc. Through the above-mentioned reasonable proportioning of activated carbon, impurities in water can be effectively adsorbed, such as residual chlorine, COD, PFAS, VOCs, heavy metals, etc.

[0078] Optionally, the ultrafiltration membrane module 6 uses ultrafiltration membrane fibers, which are encapsulated after being drawn from polyethersulfone or polyetheramide. By setting the ultrafiltration membrane module 6, high-precision physical interception can be achieved, with a pore size of about 0.01 micrometers, which can remove microplastics, microorganisms, viruses, etc., and improve the purification effect.

[0079] Optionally, the granular resin filter media filled in the first filter chamber 11 comprises the following components (by weight percentage): 88%-92% polystyrene-based or polypropylene-based weak acid cation exchange resin, 7%-9% potassium-type cation exchange resin, and 1%-3% silver-loaded cation exchange resin. Preferably, the polystyrene-based or polypropylene-based weak acid cation exchange resin accounts for 90% by weight, the potassium-type cation exchange resin accounts for 8% by weight, and the silver-loaded cation exchange resin accounts for 2% by weight. Through the scientific formulation of the granular resin filter media, effective adsorption of metal ions such as calcium and magnesium is achieved, reducing water pH, carbonate hardness, and total hardness.

[0080] The filter media formulation described above, consisting of activated carbon filter media 7, ultrafiltration membrane module 6, and granular resin filter media, ensures high-quality filtration and purification of raw water, ultimately producing the filtered water desired by the user. This filter media formulation has a wide range of applications, suitable for both countertop and under-sink water purifiers.

[0081] When the above-mentioned filter media is loaded into the composite filter element in this embodiment, the raw water is filtered in two paths. One part of the water (e.g., 10%-90%) passes through the granular resin filter media in the first filter chamber 11 via the first flow path, while the other part of the water (e.g., 10%-90%) directly enters the second filter chamber 12 via the second flow path. The water from the two flow paths merges in the second filter chamber and is then filtered through the activated carbon filter media 7 and the ultrafiltration membrane assembly 6. The ratio of the two water paths is adjusted by a proportional regulating valve, thereby adjusting the pH, carbonate hardness, total hardness, etc. of the filtered water to meet different user needs.

[0082] Furthermore, this embodiment also provides a water purification device, including the aforementioned composite filter element.

[0083] The composite filter element of this application, through the structural arrangement of the first water distribution plate 21, the second water distribution plate 22, and the conduit 3, allows water to flow from bottom to top through the first filter chamber 11, which is beneficial for dispersing the granular resin filter media. While dispersing, the granular resin filter media continuously renews its contact surface, ensuring full contact with water, improving the filtration effect, and extending the service life of the filter media. By setting the first water distribution plate 21 and the second water distribution plate 22, two flow paths are formed. The water distribution ratio of the two flow paths can be adjusted by a proportional regulating valve, thereby flexibly adjusting the pH value to meet different user needs. The adjustment structure is simple and the adjustment method is convenient. By placing the filter element seat assembly 4 above the filter bottle 1 and integrating the first water inlet channel 41, the second water inlet channel 42, and the water outlet channel 43 on the filter element seat assembly 4, it is convenient to place the filter element and easy to connect the water pipe from the top of the filter element, thus facilitating the installation and removal of the filter element.

[0084] It should be understood that the above embodiments are exemplary and are not intended to encompass all possible implementations included in the claims. Various modifications and changes can be made to the above embodiments without departing from the scope of this disclosure. Similarly, the various technical features of the above embodiments can be arbitrarily combined to form other embodiments of this application that may not be explicitly described. Therefore, the above embodiments only illustrate several implementations of this application and do not limit the scope of protection of this patent application.

Claims

1. A composite filter element, characterized in that, include: A filter bottle (1) has a first filter chamber (11) and a second filter chamber (12) separated from each other inside the filter bottle (1). The first filter chamber (11) and the second filter chamber (12) extend along the height direction of the filter bottle (1). The first filter chamber (11) is used to fill particulate filter media. The upper water distributor (2) is located inside the filter bottle (1), and the first filter chamber (11) and the second filter chamber (12) are located below the upper water distributor (2); the upper water distributor (2) includes a first water distribution plate (21) and a second water distribution plate (22), and the second water distribution plate (22) is connected to the top of the first filter chamber (11) and the top of the second filter chamber (12) respectively; The top end of the conduit (3) is connected to the first water distribution plate (21), and the bottom end of the conduit (3) is connected to the bottom end of the first filter chamber (11). The first water inlet channel (41) and the water outlet channel (43) are connected. The first water inlet channel (41) is connected to the first water distribution plate (21), and the second filter chamber (12) is connected to the water outlet channel (43), thereby forming a first flow path that flows sequentially through the first water inlet channel (41), the first water distribution plate (21), the conduit (3), the first filter chamber (11), the second water distribution plate (22), the second filter chamber (12), and the water outlet channel (43).

2. The composite filter element according to claim 1, characterized in that, The filter element holder assembly (4) is located above the filter bottle (1), and the first water inlet channel (41) and the water outlet channel (43) are located on the filter element holder assembly (4).

3. The composite filter element according to claim 2, characterized in that, The filter cartridge assembly (4) further includes a second water inlet channel (42), which is connected to the second water distribution plate (22) to form a second flow path that flows sequentially through the second water inlet channel (42), the second water distribution plate (22), the second filter chamber (12), and the water outlet channel (43); The composite filter element also includes a proportional regulating valve, which is located upstream of the filter element seat assembly (4). The proportional regulating valve is used to adjust the proportion of raw water entering the first water inlet channel (41) and the second water inlet channel (42) respectively.

4. The composite filter element according to claim 1, characterized in that, The conduit (3) is located inside the first filter chamber (11) and extends downward to the bottom end of the first filter chamber (11).

5. The composite filter element according to claim 1, characterized in that, The first water distribution plate (21) is located above the second water distribution plate (22). The first water distribution plate (21) and the second water distribution plate (22) abut against each other. A first water-holding space is formed between the first water distribution plate (21) and the inner wall of the filter bottle (1). A second water-holding space is formed between the first water distribution plate (21) and the second water distribution plate (22).

6. The composite filter element according to claim 1, characterized in that, The first water distribution plate (21) has a first water distribution hole (211) connected to the conduit (3); the second water distribution plate (22) has a second water distribution hole (221) connected to the first filter chamber (11) and a third water distribution hole (222) connected to the second filter chamber (12), the second water distribution hole (221) and the third water distribution hole (222) are a plurality of each and are arranged at intervals along the circumference of the second water distribution plate (22).

7. The composite filter element according to claim 1, characterized in that, It also includes a lower water distributor (8) disposed in the filter bottle (1), the lower water distributor (8) being located at the bottom of the first filter chamber (11) and the second filter chamber (12); the lower water distributor (8) has a fourth water distribution hole (81) communicating with the conduit (3) and a fifth water distribution hole (82) communicating with the first filter chamber (11), the fifth water distribution hole (82) being a plurality of holes arranged at intervals along the circumference of the lower water distributor (8).

8. The composite filter element according to claim 1, characterized in that, The first filter chamber (11) surrounds the outside of the second filter chamber (12). The filter bottle (1) is provided with a septum (5). The septum (5) is located below the second water distribution plate (22). The first filter chamber (11) is located between the septum (5) and the filter bottle (1). The inner cavity of the septum (5) forms the second filter chamber (12).

9. The composite filter element according to claim 8, characterized in that, The second filtration chamber (12) includes a first accommodating area (121) located above and a second accommodating area (122) located below. The first accommodating area (121) is used to accommodate the ultrafiltration membrane assembly (6), and the second accommodating area (122) is used to accommodate the activated carbon filter material (7).

10. The composite filter element according to claim 9, characterized in that, A separator (123) is provided between the first accommodating area (121) and the second accommodating area (122). The second water distribution plate (22), the ultrafiltration membrane assembly (6), the separator (123) and the spacer (5) together form a flow channel (51) from the second water distribution plate (22) to the second accommodating area (122). A water outlet hole (1231) is provided in the middle of the separator (123). The second accommodating area (122) and the ultrafiltration membrane assembly (6) are connected through the water outlet hole (1231).

11. The composite filter element according to claim 9, characterized in that, The ultrafiltration membrane module (6) uses ultrafiltration membrane fibers, which are encapsulated after being drawn from polyethersulfone or polyetheramide.

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