A filtration system and a purified drinking machine

Abstract

A kind of filtering system, including waterway board, integrated filter core module and reverse osmosis filtering module, the integrated filter core module includes prefilter unit and postfilter unit integrated in the same shell, and the bottom is equipped with four water guide ports respectively with the water inlet and outlet end of prefilter unit and postfilter unit communication;The waterway board is equipped with two-input two-output type first integrated interface adapted to integrated filter core module, including first water inlet, first water outlet, second water inlet and second water outlet, each mouth is respectively connected corresponding water guide port and reverse osmosis module corresponding port.The utility model discloses by integrated filter core and special multi-interface waterway board cooperation, replace multiple independent external pipeline, realized the compact multi-waterway circulation of " prefiltering → RO membrane → postfiltering ",Effectively improve system integration, assembly efficiency and space utilization, reduce leakage and flow resistance risk, especially suitable for household and office etc. Small-scale pure drinking equipment.

Description

Technical Field

[0001] This utility model relates to the field of fluid processing and distribution equipment technology, specifically to a filtration system adapted to multi-channel water circulation, and a water purifier using the filtration system. Background Technology

[0002] In water purification equipment, the filtration system is the core unit for achieving deep water treatment. It contains key components such as water circuit board, filter element, and connecting pipes. Among them, the water circuit board is the core carrier that connects the pre-filter, RO membrane, and post-filter and guides the distribution of fluid. Its flow channel design and interface layout directly affect the fluid treatment efficiency, overall integration and space utilization of the filtration system.

[0003] There are still technical limitations in the compatibility of composite integrated filter cartridges and water circuit boards in existing filtration systems: the water circuit board interface and the integrated filter cartridge are not sufficiently coordinated. In order to solve the problems of large size and complicated maintenance of traditional independent filter cartridges, the industry has introduced integrated filter cartridge designs that combine pre- and post-filters. However, the water circuit board in the filtration system still uses the traditional "one inlet and one outlet" dual-hole water channel design. It is necessary to connect the pre-filter unit, post-filter unit and RO membrane module of the integrated filter cartridge through multiple sets of independent pipelines. This results in a mismatch between the interface and the filter cartridge function, and it is impossible to form a compact multi-water circulation path.

[0004] Chinese utility model patent application number 201922151602.8 (authorization announcement number CN211752964U) discloses "An Integrated Composite Pre- and Post-Filter Cartridge". This filter cartridge effectively reduces its volume by integrating the pre- and post-filter units into a cylindrical filter body. However, this filter cartridge only focuses on the integrated design of the filter cartridge itself and does not involve the adaptation and optimization with the water circuit board in the filtration system. The pre- and post-filter inlet and outlet ports of the integrated filter cartridge still need to be connected to the water circuit board and RO membrane assembly through independent external pipelines. Moreover, the water circuit board does not have a dedicated interface designed for the dual filtration units of this integrated filter cartridge and still adopts the traditional single-channel layout. As a result, the entire filtration system cannot support the multi-channel circulation deep treatment requirements of "pre-filtration → RO membrane → post-filtration".

[0005] In summary, while existing filtration systems have made breakthroughs in filter integration, the lack of simultaneous interface optimization in the water circuit board prevents them from better adapting to the multi-channel water circulation requirements of integrated filters and hinders the overall integration and miniaturization of the filtration system. This makes water purifiers equipped with such filtration systems unsuitable for the needs of small-scale applications such as homes and offices.

[0006] Therefore, how to optimize the design of the adapter interface between the water circuit board and the pre- and post-filter integrated cartridges in the filtration system to achieve multi-water circulation adaptation and high integration of the filtration system has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0007] The first technical problem to be solved by this utility model is to provide an integrated interface with two inlets and two outlets formed on the water circuit board by merging the water circuits of the pre-filter and post-filter cartridges, in order to adapt to the filtration system with multiple water circuit circulation.

[0008] The second technical problem to be solved by this utility model is to provide a water purifier that uses the filtration system, in view of the above-mentioned technical status.

[0009] The technical solution adopted by this utility model to solve the first technical problem is as follows: The filtration system includes a water circuit board, an integrated filter module and a reverse osmosis filtration module. The integrated filter module includes a pre-filtration unit and a post-filtration unit integrated in the same housing. The bottom of the integrated filter module is provided with four water inlets, which are respectively connected to the water inlet and water outlet of the pre-filtration unit and the water inlet and water outlet of the post-filtration unit.

[0010] The water circuit board is provided with a first integrated interface adapted to the integrated filter module. The first integrated interface has a two-inlet, two-outlet structure, which includes...

[0011] The first water inlet is connected to the water guide corresponding to the water inlet end of the pre-filter unit;

[0012] The first water outlet is connected to the water guide corresponding to the water outlet of the pre-filter unit and to the water inlet of the reverse osmosis filter module.

[0013] The second water inlet is connected to the water guide corresponding to the water inlet of the post-filtration unit and to the pure water end of the reverse osmosis filtration module.

[0014] The second water outlet is connected to the water guide corresponding to the water outlet of the post-filter unit.

[0015] To improve the docking accuracy and sealing reliability of the integrated filter module and the water circuit board, and to achieve a compact layout and independent conduction of multiple flow channels, preferably, the integrated filter module further includes an interface base connected to the bottom of the housing. The interface base has a central tubular channel and three annular flow channels formed on it. The three annular flow channels are arranged sequentially from the inside to the outside of the central tubular channel, and the central tubular channel and each annular flow channel are independently connected to the inside of the housing. The central tubular channel and the three annular flow channels are respectively connected to the four water inlets at the bottom of the integrated filter module.

[0016] To optimize the installation structure and water flow path of the pre- and post-filter units, improve space utilization, and ensure the independence of the inlet and outlet water paths of each filter unit, preferably, the post-filter unit is located below the pre-filter unit; in the interface base, the outermost annular flow channel is connected to the inlet end of the pre-filter unit through a corresponding water guide, and the central tubular channel is connected to the outlet end of the pre-filter unit through a corresponding water guide; in the interface base, the second annular flow channel from the outside to the inside is connected to the inlet end of the post-filter unit through a corresponding water guide, and the third annular flow channel from the outside to the inside is connected to the outlet end of the post-filter unit through a corresponding water guide.

[0017] To further improve the modularity and assembly convenience of the integrated filter module, and to ensure reliable connection and sealing between each flow channel and the water inlet, preferably, the interface base includes a connecting sleeve, a first interface seat, and a second interface seat connected to the bottom of the first interface seat. Both the first and second interface seats are built into the connecting sleeve. The central tubular channel and three annular flow channels are provided on the first interface seat. The bottom of the second interface seat has four insertion pipes, which are respectively connected to the central tubular channel and the three annular flow channels. The bottom opening of the insertion pipes constitutes the four water inlets.

[0018] To achieve quick insertion and reliable sealing between the integrated filter module and the water circuit board, reduce assembly steps, and lower the risk of leakage, preferably, the first integrated interface further includes four first tubular connecting parts protruding from the upper and lower end faces of the water circuit board body and distributed adjacently; the upper opening of each first tubular connecting part on the upper end face of the water circuit board body is used for the insertion pipe of the bottom of the integrated filter module to be inserted and connected, and the side wall of each first tubular connecting part on the lower end face of the water circuit board body is respectively connected to a first connecting pipe, and each first tubular connecting part and the corresponding first connecting pipe are interconnected, and the opening of the four first connecting pipes away from the first tubular connecting parts respectively forms the first inlet, the first outlet, the second inlet, and the second outlet.

[0019] To achieve the positioning and assembly of the integrated filter module and the water circuit board, a snap-fit ​​structure is used to improve connection stability and avoid leakage caused by misalignment. Preferably, the first integrated interface further includes a first annular connecting wall protruding from the upper surface of the water circuit board body for positioning and connecting the integrated filter module. The portion of the first tubular connecting part located on the upper surface of the water circuit board body is located inside the first annular connecting wall. The inner side wall of the first annular connecting wall is provided with a first slot, and the outer side wall of the connecting sleeve is provided with a first locking block adapted to the first slot.

[0020] To achieve efficient integration and reliable connection between the reverse osmosis filtration module and the water circuit board, and to construct a complete "pre-filtration → RO membrane → post-filtration" water circuit cycle, preferably, the reverse osmosis filtration module includes an RO membrane assembly, and the main body of the water circuit board is also provided with a second integrated interface for connecting the RO membrane assembly. The second integrated interface includes an RO membrane inlet, an RO membrane pure water outlet, and an RO membrane wastewater outlet; the first outlet is connected to the RO membrane inlet, and the RO membrane pure water outlet is connected to the second inlet.

[0021] To improve the ease of assembly and sealing reliability of the RO membrane module and the water circuit board, and to achieve interface integration and standardization, preferably, the second integrated interface further includes three second tubular connecting parts protruding from the upper and lower end faces of the water circuit board body and distributed adjacently; the upper opening of each second tubular connecting part on the upper end face of the water circuit board body is used to connect to the corresponding interface of the RO membrane module, and the side wall of each second tubular connecting part on the lower end face of the water circuit board body is respectively connected to a second connecting pipe, and the second tubular connecting part and the corresponding second connecting pipe are interconnected, and the opening of the three second connecting pipes away from the second tubular connecting parts respectively forms the RO membrane inlet, RO membrane pure water outlet and RO membrane wastewater outlet.

[0022] To improve the positioning accuracy and connection stability of the RO membrane module installation and avoid leakage caused by docking misalignment, preferably, the second integrated interface further includes a second annular connecting wall protruding from the upper end face of the water circuit board body for positioning and connecting the RO membrane module. The portion of the second tubular connecting part located on the upper end face of the water circuit board body is located inside the second annular connecting wall. The inner side wall of the second annular connecting wall is also provided with a second slot for engaging the RO membrane module.

[0023] To optimize the layout and structure of the water circuit board and facilitate better manufacturing, the water circuit board body preferably includes a first water circuit board and a second water circuit board that are separately arranged and adjacent to each other, with the first integrated interface disposed on the first water circuit board and the second integrated interface disposed on the second water circuit board.

[0024] The technical solution adopted by this utility model to solve the second technical problem is: a water purifier, the water purifier including the aforementioned filtration system, the second water outlet of the filtration system being connected to the water outlet of the water purifier.

[0025] Compared with the prior art, the advantages of this utility model are as follows: By setting an integrated filter module with a pre-filter unit and a post-filter unit in the filtration system, and setting four water guide ports at the bottom of the module that are respectively connected to the inlet and outlet of the pre-filter unit and the post-filter unit, and setting a first integrated interface with a two-inlet and two-outlet structure adapted to the integrated filter module on the water circuit board, the first inlet, first outlet, second inlet and second outlet of the first integrated interface are respectively connected to the corresponding water guide ports and the corresponding ports of the reverse osmosis filtration module. Since the first integrated interface of the water circuit board forms a two-inlet and two-outlet structure specifically adapted to the inlet and outlet water circuit of the integrated filter module, the problem of mismatch between the traditional water circuit board and the integrated filter function is solved. Multiple sets of independent external pipelines are not required, thus forming a compact "pre-filter → RO membrane → post-filter" multi-water circulation path, which greatly improves the integration, reliability and space utilization of the filtration system, making the water purifier more suitable for small scenarios such as homes and offices. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of this embodiment;

[0027] Figure 2 This is a schematic diagram of the decomposed state structure of this embodiment;

[0028] Figure 3 This is a bottom-view three-dimensional structural diagram of the integrated filter module in this embodiment;

[0029] Figure 4 This is a three-dimensional structural diagram of the reverse osmosis filtration module from the bottom view in this embodiment;

[0030] Figure 5 This is a cross-sectional view of the integrated filter module in this embodiment.

[0031] Figure 6 This is a cross-sectional view of the integrated filter module in this embodiment.

[0032] Figure 7 This is a three-dimensional structural diagram of the interface base in this embodiment;

[0033] Figure 8 This is a schematic diagram of the exploded state structure of the interface base in this embodiment;

[0034] Figure 9 This is a schematic diagram of the exploded state structure of the interface base from another angle in this embodiment;

[0035] Figure 10 This is a top-view orthographic projection view of the first interface socket in this embodiment;

[0036] Figure 11This is a bottom orthographic projection view of the first interface socket in this embodiment;

[0037] Figure 12 This is a three-dimensional structural diagram of the water channel plate from the top view in this embodiment;

[0038] Figure 13 This is a three-dimensional structural diagram of the water channel plate from the bottom view in this embodiment;

[0039] Figure 14 This is a cross-sectional view of the water channel plate in this embodiment.

[0040] Figure 15 This is a three-dimensional structural diagram of the water purifier in this embodiment. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] Figures 1-15 The figure shown is the preferred embodiment of this utility model.

[0043] The filtration system in this embodiment mainly includes a water circuit board 1, an integrated filter module 2, and a reverse osmosis filtration module 3. It aims to solve the problem that the water circuit board in the existing filtration system uses a traditional "one inlet and one outlet" design, which is incompatible with the function of the integrated pre- and post-filter cartridges. This results in low integration and miniaturization due to the need for multiple independent pipeline connections, and the inability to support the multi-channel water circulation requirements of "pre-filtration → RO membrane → post-filtration". By integrating the filter module into a single design, using two inlet and two outlet integrated interfaces, and adopting a modular layout, it achieves multi-channel circulation adaptation and a high degree of integration of the filtration system, meeting the needs of small-scale applications.

[0044] The structure and connection relationship of each component in this embodiment are as follows:

[0045] This integrated filter module 2: Reference Figure 3 , Figures 5 to 9 As shown, the integrated filter module 2 is a composite component that integrates pre-filtration and post-filtration functions. Its core function is to achieve dual filtration of pre-treatment and post-taste optimization. It mainly includes a shell 2a, a pre-filtration unit 2b, a post-filtration unit 2c, four water inlets 2d, and an interface base 2e.

[0046] The outer casing 2a has a columnar structure and is sealed and molded from food-grade plastic. The upper part of the internal chamber houses the pre-filter unit 2b, and the lower part houses the post-filter unit 2c, i.e., the post-filter unit 2c is located below the pre-filter unit 2b. The pre-filter unit 2b is filled with a composite filter media of PP cotton and activated carbon to remove large particles such as sediment and rust from the raw water. The post-filter unit 2c is filled with compressed activated carbon filter media to adsorb residual chlorine in the water and improve the taste of drinking water.

[0047] The interface base 2e is a key component connecting the integrated filter module and the water circuit board. It is connected to the bottom of the outer casing 2a and includes a connecting sleeve 2f, a first interface seat 2e5, and a second interface seat 2e6 that abuts below the first interface seat 2e5. (Reference) Figure 7 , Figure 8 , Figure 9 , Figure 10 and Figure 11 As shown, the first interface seat 2e5 has a central tubular channel 2e1 and three annular channels. The three annular channels, from the inside out, are the first annular channel 2e2, the second annular channel 2e3, and the third annular channel 2e4. These three annular channels surround the outside of the central tubular channel 2e1, and each annular channel is independently connected to the interior of the outer shell 2a. The bottom of the second interface seat 2e6 has four insertion pipes 2e7. These four insertion pipes 2e7 are respectively connected to the central tubular channel 2e1, the first annular channel 2e2, the second annular channel 2e3, and the third annular channel 2e4. The bottom openings of the insertion pipes 2e7 form four water inlets 2d. The central tubular channel 2e1, the first annular channel 2e2, the second annular channel 2e3, and the third annular channel 2e4 are respectively connected to their corresponding water inlets 2d via drain outlets 2e8 located at their bottoms. For the specific structure and location of the drain outlets 2e8, please refer to [reference needed]. Figure 10 , Figure 11 as well as Figure 5 , Figure 6 As shown.

[0048] The connecting sleeve 2f is connected to the bottom of the outer shell 2a, and the first interface seat 2e5 and the second interface seat 2e6 are both built into the connecting sleeve 2f. The outer side wall of the connecting sleeve 2f is provided with a first locking block 2f1 that is adapted to the first locking groove 1a6a, which is used to lock and position the connecting block 2f with the first annular connecting wall 1a6 of the water circuit board 1.

[0049] The third annular flow channel 2e4 is connected to the inlet of the pre-filter unit through the corresponding water guide 2d, and the central tubular channel 2e1 is connected to the outlet of the pre-filter unit through the corresponding water guide 2d; the second annular flow channel 2e3 is connected to the inlet of the post-filter unit through the corresponding water guide 2d, and the first annular flow channel 2e2 is connected to the outlet of the post-filter unit through the corresponding water guide 2d.

[0050] Waterway board 1: Reference Figure 1 , Figure 2 , Figures 12 to 14As shown, the water channel plate 1 is the core carrier and flow distribution carrier of the entire filtration system, including the water channel plate body 1b, the first integrated interface 1a, and the second integrated interface 1c, all made of food-grade plastic. The water channel plate body 1b has a flat structure, including a separate and adjacent first water channel plate 1b1 and a second water channel plate 1b2. The first water channel plate 1b1 is specifically used to install the first integrated interface 1a, and the second water channel plate 1b2 is specifically used to install the second integrated interface 1c. The separate arrangement enables modular management of the interfaces, while the adjacent layout avoids pipe dispersion, balancing flexibility and integration.

[0051] The first integrated interface 1a is a "two-in, two-out" interface adapted to the integrated filter module 2, and is set on the first water circuit board 1b1. It includes a first inlet 1a1, a first outlet 1a2, a second inlet 1a3, a second outlet 1a4, four first tubular connecting parts 1a5, and a first annular connecting wall 1a6. The first inlet 1a1 is used to connect with the guide port 2d corresponding to the water inlet end of the pre-filter unit. The first outlet 1a2 is used to connect with the guide port 2d corresponding to the water outlet end of the pre-filter unit and to the water inlet end of the reverse osmosis filter module 3. The second inlet 1a3 is used to connect with the guide port 2d corresponding to the water inlet end of the post-filter unit and to the pure water end of the reverse osmosis filter module 3. The second outlet 1a4 is used to connect with the guide port 2d corresponding to the water outlet end of the post-filter unit.

[0052] refer to Figure 1 , Figure 2 , Figures 12 to 14 As shown, there are four first tubular connecting parts 1a5, all of which are hollow cylindrical structures. They protrude from the upper and lower end faces of the water circuit board body 1b and are distributed adjacent to each other. The side walls of each first tubular connecting part 1a5 are connected in sequence to enhance the structural strength and reduce the layout space. The upper opening of each first tubular connecting part 1a5 located on the upper end face of the water circuit board body 1b is used for the insertion pipe 2e7 at the bottom of the integrated filter module 2 to be inserted and connected. The side walls of each first tubular connecting part 1a5 located on the lower end face of the water circuit board body 1b are respectively connected to first connecting pipes 1a5a, and each first tubular connecting part 1a5 and the corresponding first connecting pipe 1a5a are interconnected. The openings of the four first connecting pipes 1a5a away from the first tubular connecting parts 1a5 respectively form the first inlet 1a1, the first outlet 1a2, the second inlet 1a3, and the second outlet 1a4.

[0053] refer to Figure 2 and Figure 12As shown, the first annular connecting wall 1a6 is an annular protrusion structure protruding from the upper end face of the water circuit board body 1b, used for positioning and connecting the integrated filter module 2. The portion of the first tubular connecting part 1a5 located on the upper end face of the water circuit board body 1b is located inside the first annular connecting wall 1a6. The inner side wall of the first annular connecting wall 1a6 is also provided with a first slot 1a6a, which is adapted to the first locking block 2f1 on the outer side wall of the connecting sleeve 2f to achieve a stable locking connection.

[0054] The second integrated interface 1c is used to connect the RO membrane module 3c in the reverse osmosis filtration module 3. It is set on the second water circuit plate 1b2 and includes an RO membrane inlet 1c1, an RO membrane pure water outlet 1c2, an RO membrane wastewater outlet 1c3, three second tubular connecting parts 1c4 and a second annular connecting wall 1c5.

[0055] refer to Figure 2 , Figures 12 to 14 As shown, there are three second tubular connecting parts 1c4, all of which are hollow cylindrical structures, protruding from the upper and lower end faces of the water circuit board body 1b and distributed adjacently. The side walls of each second tubular connecting part 1c4 are connected in sequence. The upper opening of each second tubular connecting part 1c4 located on the upper end face of the water circuit board body 1b is used to connect to the corresponding interface of the RO membrane module; the side wall of each second tubular connecting part 1c4 located on the lower end face of the water circuit board body 1b is respectively connected to a second connecting pipe 1c4a, and the second tubular connecting part 1c4 and the corresponding second connecting pipe 1c4a are interconnected. The openings of the three second connecting pipes 1c4a away from the second tubular connecting part 1c4 respectively form the RO membrane inlet 1c1, the RO membrane pure water inlet 1c2, and the RO membrane wastewater inlet 1c3.

[0056] refer to Figure 1 and Figure 12 As shown, the second annular connecting wall 1c5 is an annular protrusion structure protruding from the upper end face of the water circuit board body 1b, used for positioning and connecting the RO membrane module 3c. The portion of the second tubular connecting part 1c4 located on the upper end face of the water circuit board body 1b is located inside the second annular connecting wall 1c5. The inner sidewall of the second annular connecting wall 1c5 is also provided with a second slot 1c5a for engaging the RO membrane module 3c, achieving precise positioning and stable connection of the RO membrane module.

[0057] Among them, reference Figure 1 and Figure 14As shown, the first outlet 1a2 of the first integrated interface 1a is connected to the RO membrane inlet 1c1 of the second integrated interface 1c via a pipe passage. The RO membrane pure water outlet 1c2 of the second integrated interface 1c is also connected to the second inlet 1a3 of the first integrated interface 1a via a pipe passage, forming a complete filtration water circuit. Simultaneously, the first annular connecting wall 1a6, the first tubular connecting part 1a5, and the first connecting pipe 1a5a are integrally formed with the first water circuit plate 1b1; the second annular connecting wall 1c5, the second tubular connecting part 1c4, and the second connecting pipe 1c4a are also integrally formed with the second water circuit plate 1b2, reducing assembly steps while improving sealing.

[0058] Reverse osmosis filtration module 3: Reference Figure 4 As shown, the reverse osmosis filtration module 3 includes an RO membrane component 3c, which is the core component for achieving deep water purification. Its corresponding interface is connected to the second tubular connection part 1c4 of the second integrated interface 1c, and the outer peripheral protrusion is adapted to and engaged with the second slot 1c5a of the second annular connecting wall 1c5, so as to achieve stable assembly and fluid communication.

[0059] An additional explanation is needed here: We can install one-way valves (not shown in the attached drawings) inside the first tubular connection 1a5 and the second tubular connection 1c4 to control the opening and closing of the flow channels. At the same time, we can seal the lower ends of the first tubular connection 1a5 and the second tubular connection 1c4, allowing liquid to flow only from the first tubular connection 1a5 to the corresponding first connecting pipe 1a5a and from the second tubular connection 1c4 to the corresponding second connecting pipe 1c4a, thereby effectively preventing backflow of water and ensuring the one-wayness and reliability of the filtration process.

[0060] The filtration system in this embodiment achieves advanced water treatment through a multi-path water circulation process of "pre-filtration → reverse osmosis filtration → post-filtration". Its specific working principle is explained as follows:

[0061] Pre-filtration stage: Raw water enters the corresponding first connecting pipe 1a5a through the first inlet 1a1 of the first integrated interface 1a. Since the first connecting pipe 1a5a is interconnected with the corresponding first tubular connecting part 1a5, the raw water flows smoothly into the first tubular connecting part 1a5 and connects to the insertion pipe 2e7 of the integrated filter module 2 through the opening at the upper end of the first tubular connecting part 1a5. It then enters the pre-filtration unit 2b through the third annular flow channel 2e4. After the pre-filtration removes large particles such as silt and rust, the raw water flows from the outlet of the pre-filtration unit into the central tubular channel 2e1, then back to the first tubular connecting part 1a5 through the corresponding insertion pipe 2e7, and finally flows out from the first outlet 1a2 through the corresponding first connecting pipe 1a5a. Figure 5 The arrows shown indicate the water path diagram for the pre-filter.

[0062] Reverse osmosis filtration stage: The pre-filtered water flowing out from the first outlet 1a2 enters the RO membrane inlet 1c1 of the second integrated interface 1c through the pipeline, flows into the corresponding second tubular connection part 1c4 through the second connecting pipe 1c4a, and enters the RO membrane module 3c through the opening at the upper end of the second tubular connection part 1c4. The RO membrane module 3c performs reverse osmosis treatment on the water, removing heavy metals, bacteria and other harmful substances from the water. The produced pure water flows out from the RO membrane pure water outlet 1c2, and the produced wastewater is discharged from the system from the RO membrane wastewater outlet 1c3.

[0063] Post-filtration stage: Pure water flowing from the RO membrane pure water outlet 1c2 returns to the second inlet 1a3 of the first integrated interface 1a through the pipeline, flows into the corresponding first tubular connection part 1a5 via the first connecting pipe 1a5a, and enters the post-filtration unit 2c of the integrated filter element through the insertion pipe 2e7 and the second annular flow channel 2e3. After the pure water is post-filtered to improve its taste, it flows from the outlet of the post-filtration unit into the first annular flow channel 2e2, then returns to the first tubular connection part 1a5 via the corresponding insertion pipe 2e7, and finally flows out from the second outlet 1a4 after passing through the corresponding first connecting pipe 1a5a, for user use. Figure 6 The arrows shown indicate the water path diagram for post-filtration.

[0064] Throughout the entire operation, the first annular connecting wall 1a6 engages with the connecting sleeve 2f of the integrated filter module 2 via the first slot 1a6a, and the second annular connecting wall 1c5 engages with the RO membrane assembly 3c via the second slot 1c5a, ensuring precise assembly positioning and a stable connection, thus preventing fluid flow and filtration efficiency from being affected by assembly misalignment. The adjacent first water circuit board 1b1 and second water circuit board 1b2, while enabling modular interface management, also facilitate manufacturing. The integrated molding structure reduces weak points in the seal, lowers the risk of leakage, and significantly optimizes the pipeline layout, achieving integration and miniaturization of the filtration system. This allows water purifiers equipped with this system to be adapted to small scenarios such as homes and offices.

[0065] In addition, this embodiment also provides a water purifier; please refer to the following for details. Figure 15 As shown, it includes a main body and a filtration system installed inside the main body. The second water outlet 1a4 of the filtration system is connected to the water outlet of the water purifier through an internal pipe.

[0066] The water purifier in this embodiment integrates the traditionally dispersed pre-filtration, reverse osmosis filtration, and post-filtration modules and their complex connecting pipes by incorporating the filtration system. This greatly reduces the internal space occupied, lowers the assembly complexity and leakage risk, and makes the whole machine very compact, which can be easily adapted to small-scale scenarios with limited space, such as home kitchen countertops and office tea rooms.

[0067] It should be noted that in the description of this embodiment, the terms "front," "rear," "left," "right," "up," "down," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are merely for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

Claims

1. A filtration system comprising a water circuit board (1), an integrated filter module (2), and a reverse osmosis filtration module (3), characterized in that: The integrated filter module (2) includes a pre-filter unit (2b) and a post-filter unit (2c) integrated in the same housing (2a). The bottom of the integrated filter module (2) is provided with four water inlets (2d), which are respectively connected to the water inlet and water outlet of the pre-filter unit and the water inlet and water outlet of the post-filter unit. The water circuit board (1) is provided with a first integrated interface (1a) adapted to the integrated filter module (2). The first integrated interface (1a) has a two-inlet and two-outlet structure, which includes... The first water inlet (1a1) is connected to the water guide (2d) corresponding to the water inlet end of the pre-filter unit; The first outlet (1a2) is connected to the guide port (2d) corresponding to the outlet end of the pre-filter unit, and is also connected to the inlet end of the reverse osmosis filter module (3). The second inlet (1a3) is connected to the guide port (2d) corresponding to the inlet end of the post-filtration unit, and is also connected to the pure water end of the reverse osmosis filtration module (3). The second outlet (1a4) is connected to the water guide (2d) corresponding to the water outlet of the post-filter unit.

2. The filtration system according to claim 1, characterized in that: The integrated filter module (2) also includes an interface base (2e) connected to the bottom of the outer shell (2a). The interface base (2e) has a central tubular channel (2e1) and three annular channels. The three annular channels are arranged from the inside to the outside as a first annular channel (2e2), a second annular channel (2e3), and a third annular channel (2e4) and surround the outside of the central tubular channel (2e1). The central tubular channel (2e1) and each annular channel are independently connected to the inside of the outer shell (2a). The central tubular channel (2e1) and the three annular channels are respectively connected to the four water inlets (2d) at the bottom of the integrated filter module (2).

3. The filtration system according to claim 2, characterized in that: The post-filter unit (2c) is disposed below the pre-filter unit (2b); In the interface base (2e), the third annular flow channel (2e4) is connected to the inlet end of the pre-filter unit through the corresponding water guide (2d), and the central tubular channel (2e1) is connected to the outlet end of the pre-filter unit through the corresponding water guide (2d). In the interface base (2e), the second annular flow channel (2e3) is connected to the inlet end of the post-filter unit through the corresponding water guide (2d), and the first annular flow channel (2e2) is connected to the outlet end of the post-filter unit through the corresponding water guide (2d).

4. The filtration system according to claim 2, characterized in that: The interface base (2e) includes a connecting sleeve (2f), a first interface seat (2e5), and a second interface seat (2e6) mating below the first interface seat (2e5). The first interface seat (2e5) and the second interface seat (2e6) are both built into the connecting sleeve (2f). The central tubular channel (2e1), the first annular flow channel (2e2), the second annular flow channel (2e3), and the third annular flow channel (2e4) are provided on the first interface seat (2e5). The bottom of the second interface seat (2e6) has four insertion pipes (2e7), which are respectively connected to the central tubular channel (2e1), the first annular flow channel (2e2), the second annular flow channel (2e3) and the third annular flow channel (2e4). The bottom opening of the insertion pipe (2e7) constitutes the four water inlets (2d).

5. The filtration system according to claim 4, characterized in that: The water circuit board (1) includes a water circuit board body (1b), and the first integrated interface (1a) further includes four first tubular connecting parts (1a5) protruding from the upper and lower end faces of the water circuit board body (1b) and distributed adjacent to each other. The upper openings of each first tubular connecting part (1a5) located on the upper end face of the water circuit board body (1b) are used for the insertion pipe (2e7) at the bottom of the integrated filter module (2) to be inserted and connected. The side walls of each first tubular connecting part (1a5) located on the lower end face of the water circuit board body (1b) are respectively connected to a first connecting pipe (1a5a), and each first tubular connecting part (1a5) and the corresponding first connecting pipe (1a5a) are interconnected. The openings of the four first connecting pipes (1a5a) away from the first tubular connecting part (1a5) respectively form the first water inlet (1a1), the first water outlet (1a2), the second water inlet (1a3) and the second water outlet (1a4).

6. The filtration system according to claim 5, characterized in that: The first integrated interface (1a) further includes a first annular connecting wall (1a6) protruding from the upper end face of the water circuit board body (1b) for positioning and connecting the integrated filter module (2). The portion of the first tubular connecting part (1a5) located on the upper end face of the water circuit board body (1b) is located inside the first annular connecting wall (1a6). The inner side wall of the first annular connecting wall (1a6) is provided with a first slot (1a6a). The outer side wall of the connecting sleeve (2f) is provided with a first locking block (2f1) adapted to the first slot (1a6a).

7. The filtration system according to claim 5, characterized in that: The reverse osmosis filtration module (3) includes an RO membrane assembly (3c). The water circuit board body (1b) is also provided with a second integrated interface (1c) for connecting the RO membrane assembly (3c). The second integrated interface (1c) includes an RO membrane inlet (1c1), an RO membrane pure water outlet (1c2), and an RO membrane wastewater outlet (1c3). The first outlet (1a2) is connected to the RO membrane inlet (1c1), and the RO membrane pure water outlet (1c2) is connected to the second inlet (1a3).

8. The filtration system according to claim 7, characterized in that: The second integrated interface (1c) also includes three second tubular connecting parts (1c4) protruding from the upper and lower end faces of the water circuit board body (1b) and distributed adjacent to each other; The upper opening of each second tubular connection part (1c4) located on the upper end face of the water circuit board body (1b) is used to connect to the corresponding interface of the RO membrane module. The side wall of each second tubular connection part (1c4) located on the lower end face of the water circuit board body (1b) is connected to a second connecting pipe (1c4a), and the second tubular connection part (1c4) and the corresponding second connecting pipe (1c4a) are interconnected. The opening of the end of the three second connecting pipes (1c4a) away from the second tubular connection part (1c4) respectively forms the RO membrane inlet (1c1), RO membrane pure water outlet (1c2) and RO membrane wastewater outlet (1c3).

9. The filtration system according to claim 8, characterized in that: The second integrated interface (1c) further includes a second annular connecting wall (1c5) protruding from the upper end face of the water circuit board body (1b) for positioning and connecting the RO membrane assembly (3c). The portion of the second tubular connecting part (1c4) located on the upper end face of the water circuit board body (1b) is located inside the second annular connecting wall (1c5). The inner side wall of the second annular connecting wall (1c5) is also provided with a second slot (1c5a) for engaging the RO membrane assembly (3c).

10. A water purifier (4), characterized in that: The water purifier (4) includes a filtration system according to any one of claims 1 to 9, wherein the second outlet (1a4) of the filtration system is connected to the outlet end of the water purifier (4).

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