A faucet water purifier

Abstract

This application discloses a faucet water purifier, including a housing, a filter element, and a water path switching valve assembly. The housing has a water path switching chamber for accommodating the water path switching valve assembly and a filter chamber for accommodating the filter element. The water path switching valve assembly includes a valve body, a valve core, and a raw water guide component. The valve body has an inlet and a purified water channel, with a filter inlet and a filter outlet connected to the filter chamber. The raw water guide component is installed in the valve body and has a raw water channel, with a raw water inlet and a raw water outlet. The raw water inlet and the filter inlet are arranged opposite each other. The valve core is coaxially inserted through the raw water guide component and has a sealing part at one end. The valve core, through axial displacement relative to the raw water guide component, causes the sealing part to open one of the filter inlet and the raw water inlet and simultaneously close the other. The inlet is connected to either the open raw water inlet or the open filter inlet. The independent design of the valve body and the raw water guide component simplifies the manufacturing process and reduces assembly difficulty.

Description

Technical Field

[0001] This application relates to the technical field of tap water purification equipment, specifically to a faucet water purifier. Background Technology

[0002] Faucet water purifiers, as small water purification devices installed directly on faucets, are widely popular due to their ease of installation and flexible use. Existing faucet water purifiers typically offer two water output modes: purified water and raw water, which users can switch between according to their needs. One of their core components is the water path switching valve assembly, which controls the flow direction of raw water and purified water, playing a crucial role in the normal operation and user experience of the entire water purifier.

[0003] In existing technologies, the valve body and related internal structures of a water circuit switching valve assembly are typically designed as a single unit. This integrated design has gradually revealed several problems in practical applications. First, during valve core assembly, because the entire structure is integrated, the valve core needs to be installed inside the already formed and relatively enclosed valve body. This results in extremely limited operating space, making it difficult for assembly workers or automated equipment to accurately place the valve core in the intended position. Furthermore, the operation process can easily damage the pre-machined flow channels and other structures inside the valve body, increasing assembly difficulty and scrap rate. Second, regarding the machining of the water circuits inside the valve body, the integrated valve body structure means that the water circuits need to be formed in one piece using complex molds within a single component. This machining method requires extremely high precision in the molds; even slight deviations in the molds can lead to the water circuits' dimensions and shape not meeting design requirements, thus affecting the smoothness of water flow and sealing. Furthermore, complex water channel shapes, such as curved or branching channels, make it difficult to ensure consistent machining precision across all parts during one-piece manufacturing. This can easily lead to issues like localized roughness and burrs, increasing water flow resistance and potentially causing leaks. Additionally, when improvements or repairs are needed, a one-piece valve body is difficult to adjust or repair locally, often requiring complete replacement, which is costly. Moreover, the one-piece valve body and internal structure present inconveniences for later maintenance and parts replacement. For example, if the valve core malfunctions and needs replacement, its deep location within the valve body and limited space make disassembly and installation extremely difficult. Similarly, replacing aging or damaged sealing components like seals is cumbersome with a one-piece structure, impacting the maintainability and lifespan of the entire faucet water purifier. Utility Model Content

[0004] The purpose of this application is to provide a faucet water purifier that can effectively solve the problems in assembly, water circuit processing and maintenance of valve body and internal structure, and improve the overall performance and ease of use of the faucet water purifier.

[0005] The technical solution adopted in this application is as follows:

[0006] A faucet-mounted water purifier includes a housing, a filter element, and a water path switching valve assembly. The housing has a water path switching chamber for accommodating the water path switching valve assembly and a filter chamber for accommodating the filter element. The water path switching valve assembly includes a valve body, a valve core, and a raw water guide component. The valve body has an inlet and a purified water channel. The purified water channel has a filter inlet and a filter outlet, and the filter outlet communicates with the filter chamber. The raw water guide component is installed in the valve body and has a raw water channel. The raw water channel has a raw water inlet and a raw water outlet. The raw water inlet is arranged opposite to the filter inlet. The valve core is coaxially inserted through the raw water guide component and has a sealing portion at one end. The valve core, by axial displacement relative to the raw water guide component, causes the sealing portion to open one of the filter inlet and the raw water inlet and simultaneously close the other. The inlet communicates with either the raw water inlet or the filter inlet in the open state.

[0007] In this technical solution, the water circuit switching valve assembly is designed as a structure comprising a valve body, a valve core, and a raw water guide component. For valve core assembly, the raw water guide component is separated from the valve body, allowing the valve core to be coaxially inserted into it. Since the raw water guide component is an independent and easier-to-operate component relative to the valve body, it provides ample and regular space for valve core installation, reducing assembly difficulty. Assembly workers can place the valve core more accurately and easily, avoiding potential damage to the valve core and valve body interior caused by operation within the narrow space of a one-piece valve body, effectively improving assembly efficiency and product yield. Regarding the water circuit, the clean water flow channel is located in the valve body, and the raw water flow channel is located in the raw water guide component. This split water circuit layout is less restricted by water circuit processing, allowing for more suitable processing techniques to be applied to the valve body and raw water guide component separately, ensuring smooth inner walls of the flow channels, optimizing water flow, reducing water flow resistance, and improving the performance of the entire water circuit system. Furthermore, the opening and closing of the raw water inlet and the filter inlet are controlled by the axial displacement of the valve core relative to the raw water guide component, realizing the switching function between raw water and purified water. This design structure is simple and the switching action is reliable. Only by changing the position of the valve core can the corresponding inlet be opened or closed precisely, ensuring that the water inlet is connected to the corresponding inlet in the open state, effectively avoiding unnecessary water flow interference and leakage, and improving the accuracy and stability of the product's water flow control.

[0008] The valve body has an installation hole that extends from the outside to the inside to the filter inlet. The raw water guide includes a plug-in part that is inserted into the installation hole. The valve core passes through the plug-in part, and the raw water flow channel is formed in the plug-in part and surrounds the valve core.

[0009] In this technical solution, the valve body has a mounting hole extending from the outside to the filter inlet. The insertion part of the raw water guide component is inserted into this mounting hole. This embedded connection method makes the assembly process of the raw water guide component and the valve body clear and convenient, facilitates positioning, reduces alignment errors during assembly, and improves the overall assembly speed. Moreover, the raw water flow channel is formed in the insertion part and surrounds the valve core, making full use of the annular space of the insertion part. Without increasing the overall volume, the layout of the raw water flow channel is rationally planned, ensuring smooth flow of raw water and making the structure of the entire water circuit switching valve assembly more compact, optimizing space utilization, and avoiding space waste or component interference problems caused by unreasonable water circuit layout.

[0010] A pair of slots are provided on opposite sides of the inlet end of the mounting hole, symmetrically arranged around the axis of the mounting hole. The raw water guide is provided with radial extensions symmetrically connected to both sides of the plug-in part. The plug-in part is inserted into the mounting hole and rotated by a predetermined angle around the axis of the mounting hole, so that the radial extensions on both sides are respectively engaged in the corresponding slots, thereby achieving axial positioning.

[0011] In this technical solution, during assembly, a pair of slots on opposite sides of the inlet end of the mounting hole and radial extensions symmetrically connected to both sides of the insertion part on the raw water guide component constitute a rotary snap-fit ​​axial limiting structure. When the insertion part is inserted into the mounting hole, simply rotating it around the axis of the mounting hole by a predetermined angle allows the radial extensions to accurately engage with the corresponding slots, achieving axial limiting. This installation method eliminates the need for complex fasteners such as screws and nuts, simplifying the assembly process, reducing assembly time and cost, and avoiding the potential loosening issues caused by fasteners, thus improving the structural stability of the product during long-term use.

[0012] The filter inlet is provided with a first stop surface, and the raw water inlet is provided with a second stop surface. The first stop surface and the second stop surface define the axial displacement distance of the valve core. When the sealing part abuts against the first stop surface, the filter inlet is closed. When the sealing part abuts against the second stop surface, the raw water inlet is closed.

[0013] In this technical solution, during actual use, when the valve core moves axially, the sealing part can precisely seal the filter inlet when it abuts against the first stop surface, and seal the raw water inlet when it abuts against the second stop surface. This design achieves precise control of the valve core displacement. Compared with traditional designs that lack a clear limiting structure, it avoids problems such as sealing failure and cross-contamination caused by excessive valve core displacement, ensuring that raw water and purified water can flow along the set path without interfering with each other under any working condition, thus improving the accuracy and sealing performance of water circuit switching.

[0014] The sealing part is provided with a first sealing ring, and the insertion part and the inner wall of the mounting hole are provided with a second sealing ring and a third sealing ring. The inner wall of the mounting hole is provided with a water passage hole for the raw water outlet to exit. The raw water outlet and the water passage hole are located in the isolation space between the second sealing ring and the third sealing ring. A fourth sealing ring is provided between the valve core and the raw water guide. The third sealing ring and the fourth sealing ring together prevent water from exiting to the inlet end of the mounting hole.

[0015] In this technical solution, the first sealing ring of the sealing part directly acts to seal the filter inlet and the raw water inlet. When the valve core moves to switch water paths, the first sealing ring ensures the sealing of the inlet in the closed state, effectively preventing water leakage from the gap between the sealing part and the inlet, and ensuring the isolation effect of raw water and purified water. The second and third sealing rings between the insertion part and the inner wall of the mounting hole form an annular sealing structure around the raw water outlet. The raw water outlet and the water passage hole are located in the isolation space between the second and third sealing rings. This layout ensures that the raw water can only flow out from the raw water outlet through the water passage along a set path, preventing raw water leakage to other areas and preventing external impurities from entering the raw water channel, ensuring the purity and stability of the water flow within the raw water channel. The fourth sealing ring between the valve core and the raw water guide works in conjunction with the third sealing ring to prevent water from flowing out to the inlet end of the mounting hole, further strengthening the sealing of the entire structure and preventing backflow or seepage from unnecessary gaps.

[0016] The other end of the valve core, opposite to the sealing part, protrudes outside the valve body, forming a force-bearing end for axial displacement under force.

[0017] In this technical solution, during actual water circuit switching, the protruding force-bearing end of the valve core provides a direct and convenient point of application for external driving force, allowing users to easily apply axial force to the valve core to achieve displacement and change the on / off state of the water circuit. Compared to the traditional structure that requires transmitting operating force within the complex space inside the valve body, this design, which directly acts on the force-bearing end externally, simplifies the transmission path of operating force, reduces energy loss, and lowers the force required for operation. This makes switching between raw water and purified water easier and more convenient for users, improving the user experience.

[0018] The water circuit switching valve assembly also includes an operating component surrounding the valve body. The operating component has a driving ramp on the side facing the valve body and a lever on the side away from the valve body. The operating component can swing back and forth relative to the valve body between the raw water setting and the purified water setting, and during the swinging process, it drives the valve core to move axially through the driving ramp.

[0019] In this technical solution, the operating component is arranged around the valve body. Its driving ramp facing the valve body and the lever facing away from the valve body constitute a reasonable and ingenious driving structure. When the user operates the lever to make the operating component swing back and forth between the raw water and purified water positions relative to the valve body, the driving ramp effectively converts the swinging motion of the operating component into the axial displacement of the valve core. This motion conversion method is simple and efficient, avoiding the need for complex linkages, gears, and other transmission mechanisms to achieve the same function. This reduces the number of parts, lowers product complexity and manufacturing costs, and also reduces problems caused by wear and failure of transmission components, thus improving product reliability.

[0020] At least one of the valve body and the raw water guide is provided with an elastic element between itself and the valve core. When the operating member swings toward the raw water position, the driving inclined surface drives the valve core to compress the elastic element; when the operating member swings toward the purified water position, the elastic element drives the valve core to reset.

[0021] In this technical solution, when the operating component swings towards the raw water position, the driving inclined plane drives the valve core to compress the elastic element. The elastic element acts as a buffer, absorbing the impact force during operation and preventing the valve core from violently colliding with the valve body and other components due to sudden force. This reduces wear between components and extends the service life of the valve core and related parts. When the operating component swings towards the purified water position, the elastic element releases its stored elastic potential energy, driving the valve core to reset. This automatic reset function ensures that the water circuit switching valve assembly can quickly and accurately return to its initial state after operation, guaranteeing the normal operation of the water circuit system and preventing problems such as water circuit chaos and leakage caused by the valve core's inability to reset in time.

[0022] The filter chamber is provided with a water inlet, and the filter outlet and the water inlet are connected by a connecting pipe. One end of the connecting pipe is inserted and sealed in the filter outlet, and the other end is inserted and sealed in the water inlet.

[0023] In this technical solution, one end of the connecting pipe is inserted and sealed inside the filter outlet, and the other end is inserted and sealed inside the water inlet. This insertion and sealing connection method is simple and efficient. During assembly, the connection is completed simply by accurately inserting the connecting pipe into the corresponding interface. The operation is simple and does not require complicated procedures such as applying sealant or tightening threads, which greatly improves assembly efficiency and reduces assembly costs.

[0024] The outer casing includes an upper casing and a lower casing. The upper casing has a first opening corresponding to the water circuit switching chamber and a second opening corresponding to the filter chamber. The first opening is for connecting the water inlet of the valve body to a faucet, and the second opening is for disassembling and assembling the filter element. The upper casing is equipped with a detachable cover for opening or closing the second opening. The lower casing has a first water outlet area and a second water outlet area. The first water outlet area corresponds to the water outlet end of the filter element, and the second water outlet area corresponds to the raw water outlet.

[0025] In this technical solution, the outer casing is divided into an upper casing and a lower casing. The upper casing has a first opening corresponding to the water circuit switching chamber and a second opening corresponding to the filter chamber. The first opening is for connecting the valve body's inlet to the faucet. This layout makes the connection between the faucet and the valve body simple and direct, allowing for convenient connection operations through the first opening and improving installation efficiency. The second opening is for filter cartridge removal and installation and is equipped with a removable cover. This allows users to easily open the cover when the filter cartridge needs to be replaced, remove the old filter cartridge from the second opening, and install the new filter cartridge. This simplifies the filter cartridge replacement process, reduces user maintenance costs, and improves product maintainability. The first water outlet area corresponds to the filter cartridge's water outlet, and the second water outlet area corresponds to the raw water outlet. This partitioned design achieves physical isolation between raw water and purified water at the outlet, avoiding water pollution caused by mixing raw water and purified water. This ensures that users can obtain raw water and purified water that meet their needs separately, improving the product's safety and hygiene. Attached Figure Description

[0026] 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:

[0027] Figure 1 This is an exploded view of the faucet water purifier provided in the embodiments of this application;

[0028] Figure 2 Assembly of the faucet water purifier provided in the embodiments of this application Figure 1 ;

[0029] Figure 3 Assembly of the faucet water purifier provided in the embodiments of this application Figure 2 ;

[0030] Figure 4 Cross-sectional view of the faucet water purifier provided in the embodiments of this application. Figure 1 It shows the state where the operating element is in the raw water position, causing the valve core to close the filter inlet;

[0031] Figure 5 Cross-sectional view of the faucet water purifier provided in the embodiments of this application. Figure 2It indicates the flow path of raw water discharged through the raw water channel by arrows;

[0032] Figure 6 Cross-sectional view of the faucet water purifier provided in the embodiments of this application. Figure 3 It indicates the flow path of raw water through the water purification channel towards the filter element by arrows;

[0033] Figure 7 This is a cross-sectional view of the valve body and the raw water guide component in their mating state, as provided in the embodiment of this application.

[0034] Figure 8 This is a cross-sectional view of the valve body provided in an embodiment of this application;

[0035] Figure 9 This is a schematic diagram of the raw water guide provided in the embodiments of this application;

[0036] Figure 10 This is a schematic diagram of the valve body provided in an embodiment of this application;

[0037] Figure 11 This is an assembly drawing of the valve body and the raw water guide provided in the embodiments of this application;

[0038] Figure 12 This is a schematic diagram of the valve core structure provided in the embodiments of this application;

[0039] Figure 13 This is a cross-sectional view of the valve body, valve core, and raw water guide component in their mating state as provided in the embodiments of this application.

[0040] Figure 14 This is a schematic diagram of the structure of the operating component provided in the embodiments of this application;

[0041] Figure 15 This is a schematic diagram of the upper shell structure provided in an embodiment of this application;

[0042] Figure 16 This is a schematic diagram of the lower housing provided in an embodiment of this application.

[0043] List of components and reference numerals:

[0044] 1 Outer shell, 11 Water circuit switching chamber, 12 Filter chamber, 121 Water inlet, 13 Limiting slide, 14 Upper shell, 141 First opening, 142 Second opening, 15 Lower shell, 151 First water outlet area, 152 Second water outlet area;

[0045] 2 filter elements;

[0046] 3 Valve body, 31 Water inlet, 32 Clean water flow channel, 321 Filter inlet, 322 Filter outlet, 323 First stop surface, 33 Mounting hole, 34 Slot, 35 Water passage hole;

[0047] 4. Valve core; 41. Sealing part; 42. First sealing ring;

[0048] 5 Raw water guide component, 51 Insertion part, 511 Raw water flow channel, 5111 Raw water inlet, 5112 Raw water outlet, 5113 Second stop surface, 52 Radial extension part;

[0049] 6. Second sealing ring;

[0050] 7. Third sealing ring;

[0051] 8. Fourth sealing ring;

[0052] 9 operating components, 91 drive ramp, 92 lever;

[0053] 10. First helical spring;

[0054] 20. Second helical spring;

[0055] 30 connecting tubes;

[0056] 40 casing;

[0057] 50 decorative cases. Detailed Implementation

[0058] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0059] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0060] Furthermore, it should be understood in the description of this application that the terms "upper," "lower," "top," "bottom," "inner," "outer," "axial," "radial," "circumferential," "lateral," and "longitudinal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0061] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can 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 application according to the specific circumstances.

[0062] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0063] In the embodiments of this application, reference is made to Figures 1 to 16 As shown, a faucet water purifier is provided. For ease of explanation and understanding, the following content provided in this application is based on the illustrated product structure. Of course, those skilled in the art will understand that the above structure is only a specific example and illustrative illustration, and does not constitute a specific limitation on the technical solution provided in this application.

[0064] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the faucet water purifier includes a housing 1, a filter element 2, and a water path switching valve assembly. The housing 1 has a water path switching chamber 11 for accommodating the water path switching valve assembly and a filter chamber 12 for accommodating the filter element 2. The water path switching valve assembly includes a valve body 3, a valve core 4, and a raw water guide component 5. The valve body 3 has a water inlet 31 and a purified water flow channel 32. The purified water flow channel 32 has a filter inlet 321 and a filter outlet 322. The filter outlet 322 connects to the filter chamber 12. The raw water guide component 5 is installed inside the valve body 3 and has a raw water flow channel 511. The raw water channel 511 has a raw water inlet 5111 and a raw water outlet 5112. The raw water inlet 5111 is arranged opposite to the filter inlet 321. The valve core 4 is coaxially inserted through the raw water guide 5 and has a sealing part 41 at one end. The valve core 4 moves axially relative to the raw water guide 5, so that the sealing part 41 opens one of the filter inlet 321 and the raw water inlet 5111 and simultaneously closes the other. The water inlet 31 is connected to the raw water inlet 5111 or the filter inlet 321 in the open state.

[0065] like Figure 4 and Figure 5 As shown, the valve core 4 has closed the filter inlet 321 and opened the raw water inlet 5111. At this time, the faucet water purifier is in raw water outlet mode, and the inlet 31 is connected to the raw water inlet 5111. Figure 5 The arrows in the diagram illustrate the fluid path of water entering through inlet 31 and then being discharged directly along the original water channel 511; for example... Figure 6 As shown, the valve core 4 is open at the filter inlet 321 and closed at the raw water inlet 5111. At this time, the faucet water purifier is in the purified water output mode, and the water inlet 31 is connected to the filter inlet 321. Figure 6 The arrows in the diagram illustrate the fluid path of water flowing from the inlet 31 along the purified water channel 32 toward the filter element 2, and finally being filtered by the filter element 2 to produce purified water for discharge.

[0066] In this application, by designing the water circuit switching valve assembly as a structure including a valve body 3, a valve core 4, and a raw water guide 5, the raw water guide 5 is made independent of the valve body 3 for the assembly of the valve core 4. This allows the valve core 4 to be coaxially inserted into the raw water guide 5 first, and then the two are inserted into the valve body 3 as a whole. Since the raw water guide 5 is an independent and easier-to-operate component relative to the valve body 3, it provides a spacious and regular space for the installation of the valve core 4, reducing the assembly difficulty. Assembly workers or automated equipment can place the valve core 4 in place more accurately and easily, avoiding the damage to the valve core and valve body interior that may be caused by operation in the narrow space of the integrated valve body, effectively improving assembly efficiency and product yield.

[0067] In terms of the water circuit, the purified water flow channel 32 is located in the valve body 3, and the raw water flow channel 511 is located in the raw water guide component 5. This split water circuit layout has fewer restrictions on water circuit processing, and more suitable processing technology can be adopted for the valve body 3 and the raw water guide component 5 respectively. For example, the purified water flow channel 32 of the valve body 3 can use processes such as die casting to ensure its overall structural strength and approximate shape, while the raw water flow channel 511 of the raw water guide component 5 can achieve a more refined internal structure through processes such as precision injection molding, ensuring that the inner wall of the flow channel is smooth, optimizing the water flow state, reducing water flow resistance, and improving the performance of the entire water circuit system.

[0068] Furthermore, the opening and closing of the raw water inlet 5111 and the filter inlet 321 are controlled by the axial displacement of the valve core 4 relative to the raw water guide component 5, realizing the switching function between raw water and purified water. This design structure is simple and the switching action is reliable. Only by changing the position of the valve core 4 can the corresponding inlet be opened or closed precisely, ensuring that the water inlet 31 is connected to the corresponding inlet in the open state, effectively avoiding unnecessary water flow interference and leakage, and improving the accuracy and stability of the product's water flow control. The valve core 4 only makes pure axial linear movement. The valve core 4 axially seals the flow channel, and the sealing surface is always perpendicular to the raw water inlet 5111 and the filter inlet 321. The contact pressure is uniform, the sealing surface is evenly stressed, reducing the leakage rate and extending the service life. Moreover, the pure axial movement of the valve core 4 results in a small movement space, and the valve core 4 and valve body 3 fit together more compactly, which is conducive to the miniaturization of the water purifier.

[0069] As a preferred embodiment of this application, such as Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, the valve body 3 has a mounting hole 33 extending from the outside to the inside of the filter inlet 321. The raw water guide 5 includes a plug-in portion 51, which is inserted into the mounting hole 33. The valve core 4 passes through the plug-in portion 51, and the raw water flow channel 511 is formed in the plug-in portion 51 and surrounds the valve core 4. In this technical solution, the valve body 3 has a mounting hole 33 extending from the outside to the inside of the filter inlet 321. The plug-in portion 51 of the raw water guide 5 is inserted into the mounting hole 33. This embedded connection method makes the assembly process of the raw water guide 5 and the valve body 3 clear and convenient. For example, on the production line, workers can intuitively align the raw water guide 5 with the valve core 4 with the mounting hole 33 and insert it, which is convenient for positioning, reduces the alignment error during assembly, and improves the overall assembly speed. Furthermore, the raw water flow channel 511 is formed in the insertion part 51 and surrounds the valve core 4, making full use of the annular space of the insertion part 51. Without increasing the overall volume, the layout of the raw water flow channel 511 is rationally planned, ensuring smooth flow of raw water and making the structure of the entire water circuit switching valve assembly more compact, optimizing space utilization, and avoiding space waste or component interference problems caused by unreasonable water circuit layout. In terms of processing and manufacturing, this split design with an insertion structure allows different processing techniques to be used for the mounting hole 33 of the valve body 3 and the insertion part 51 of the raw water guide 5 to meet their respective precision requirements. For example, the mounting hole 33 can be machined with high precision to ensure the dimensional accuracy of its diameter, cylindricity, etc., to fit the insertion part 51; while the insertion part 51 can be precision injection molded and then subjected to a small amount of finishing to ensure its external dimensions and the accuracy of its fit with the valve core 4. In this way, the processing quality of each component is improved, which also helps to improve the assembly accuracy and performance of the entire water circuit switching valve assembly.

[0070] As a preferred embodiment of this implementation, such as Figure 8 , Figure 9 , Figure 10 and Figure 11As shown, a pair of slots 34 symmetrically arranged around the axis of the mounting hole 33 are provided on opposite sides of the inlet end of the mounting hole 33. The raw water guide 5 has radial extensions 52 symmetrically connected to both sides of the insertion part 51. The insertion part 51 is inserted into the mounting hole 33 and rotated by a predetermined angle around the axis of the mounting hole 33, so that the radial extensions 52 on both sides are respectively engaged in the corresponding slots 34, thereby achieving axial limiting. During assembly, the pair of slots 34 on opposite sides of the inlet end of the mounting hole 33 and the radial extensions 52 symmetrically connected to both sides of the insertion part 51 on the raw water guide 5 constitute a rotary engaging axial limiting structure. When the insertion part 51 is inserted into the mounting hole 33, it is only necessary to rotate it around the axis of the mounting hole 33 by a predetermined angle, and the radial extensions 52 can be accurately engaged in the corresponding slots 34 to achieve axial limiting. During disassembly, it is only necessary to rotate the raw water guide 5 in the opposite direction to disengage the radial extensions 52 from the slots 34, and the raw water guide 5 can be pulled out of the mounting hole 33. This installation method eliminates the need for complex fasteners such as screws and nuts, simplifying the assembly process, reducing assembly time and costs, and avoiding the potential loosening issues that can arise from using fasteners. This improves the structural stability of the product during long-term use. Furthermore, because the slot 34 is symmetrical around the axis of the mounting hole 33, and the radial extension 52 corresponds to it, the raw water guide 5 experiences uniform stress after installation. This allows it to better withstand various forces such as water flow impact and valve core 4 movement, preventing the raw water guide 5 from shifting or shaking within the valve body 3. This ensures the relative stability between the raw water channel 511 and the clean water channel 32, guaranteeing the reliability of the water circuit switching function and the sealing of the entire water system, thus extending the product's service life.

[0071] As a preferred embodiment of this implementation, such as Figure 8 and Figure 9 As shown, a first stop surface 323 is provided inside the filter inlet 321, and a second stop surface 5113 is provided inside the raw water inlet 5111. The first stop surface 323 and the second stop surface 5113 define the axial displacement distance of the valve core 4. When the sealing part 41 abuts against the first stop surface 323, the filter inlet 321 is closed; when the sealing part 41 abuts against the second stop surface 5113, the raw water inlet 5111 is closed. Figure 5 As shown, the sealing part 41 is in contact with the first stop surface 323; as Figure 6As shown, the sealing part 41 abuts against the second stop surface 5113. In actual use, when the valve core 4 moves axially, the sealing part 41 can precisely seal the filter inlet 321 when it abuts against the first stop surface 323, and can seal the raw water inlet 5111 when it abuts against the second stop surface 5113. This design achieves precise control of the displacement of the valve core 4. Compared with the traditional design that lacks a clear limiting structure, it avoids problems such as sealing failure and cross-contamination of the flow channel caused by excessive displacement of the valve core 4, ensuring that raw water and purified water can flow along the set path without interfering with each other under any working state, thus improving the accuracy and sealing performance of water circuit switching. From a manufacturing perspective, the first stop surface 323 and the second stop surface 5113 can be precisely manufactured through mold forming or machining during the processing of the valve body 3 and the raw water guide component 5, ensuring their positional and dimensional accuracy. Furthermore, since they are processed on their respective components (valve body 3 corresponding to filter inlet 321 and raw water guide component 5 corresponding to raw water inlet 5111), it is convenient for quality control and precision adjustment, which helps to improve the quality stability of the entire water circuit switching valve assembly and reduce the product defect rate caused by inaccurate displacement control of valve core 4.

[0072] As a preferred embodiment of this implementation, such as Figure 8 , Figure 12 and Figure 13As shown, the sealing part 41 is provided with a first sealing ring 42, and a second sealing ring 6 and a third sealing ring 7 are provided between the insertion part 51 and the inner wall of the mounting hole 33. A water passage hole 35 for the raw water outlet 5112 is provided on the inner wall of the mounting hole 33. The raw water outlet 5112 and the water passage hole 35 are located in the isolation space between the second sealing ring 6 and the third sealing ring 7. A fourth sealing ring 8 is provided between the valve core 4 and the raw water guide 5. The third sealing ring 7 and the fourth sealing ring 8 together prevent water from flowing out to the inlet end of the mounting hole 33. Preferably, the first sealing ring 42, the second sealing ring 6, the third sealing ring 7, and the fourth sealing ring 8 can all be rubber sealing rings. In this technical solution, the first sealing ring 42 of the sealing part 41 directly acts on the sealing of the filter inlet 321 and the raw water inlet 5111. When the valve core 4 moves to switch the water path, the first sealing ring 42 ensures the sealing of the inlet in the closed state, effectively preventing water from leaking from the gap between the sealing part 41 and the inlet, and ensuring the isolation effect of raw water and purified water. The second sealing ring 6 and the third sealing ring 7 between the plug part 51 and the inner wall of the mounting hole 33 form an annular sealing structure around the raw water outlet 5112. The raw water outlet 5112 and the water passage hole 35 are located in the isolation space between the second sealing ring 6 and the third sealing ring 7. This layout ensures that the raw water can only flow out from the raw water outlet 5112 through the water passage hole 35 according to the set path, avoiding the leakage of raw water to other areas, and also preventing external impurities from entering the raw water channel 511, ensuring the purity and stability of the water flow in the raw water channel 511. The fourth sealing ring 8, located between the valve core 4 and the raw water guide component 5, works in conjunction with the third sealing ring 7 to prevent water from flowing out of the inlet end of the mounting hole 33. This further enhances the sealing performance of the entire structure, preventing water from flowing back or leaking out from unnecessary gaps. Especially when facing high water pressure, the cooperation of multiple sealing rings can better withstand the water pressure, ensuring that the entire water circuit switching valve assembly can maintain good sealing performance under various operating conditions. This reduces the risk of product failure due to water leakage and extends the product's maintenance cycle and service life.

[0073] As a preferred embodiment of this application, such as Figure 13As shown, the other end of the valve core 4, opposite to the sealing part 41, protrudes outside the valve body 3, forming a force-bearing end for axial displacement. During actual water circuit switching, the protruding force-bearing end of the valve core 4 provides a direct and convenient point of application for external driving force. Whether through manual operation or subsequent possible automated control (such as connecting to an electric actuator or other driving device), users can easily apply axial force to the valve core 4 to achieve displacement and change the on / off state of the water circuit. Compared to the traditional structure that requires transmitting operating force within the complex space inside the valve body 3, this design, which directly acts on the force-bearing end externally, simplifies the transmission path of operating force, reduces energy loss, and lowers the required operating force, making it easier and more convenient for users to switch between raw water and purified water, thus improving the user experience. Meanwhile, the force-bearing end is located outside the valve body 3, which facilitates maintenance and testing. For example, when problems such as the valve core 4 not moving smoothly occur, maintenance personnel can directly inspect and adjust the force-bearing end from the outside without the need for complex operations such as disassembling the entire valve body 3. This improves the maintainability of the product, shortens maintenance time, and reduces maintenance costs.

[0074] Furthermore, such as Figures 1 to 4 and Figure 14 As shown, the water switching valve assembly also includes an operating component 9 surrounding the valve body 3. The operating component 9 has a driving ramp 91 on the side facing the valve body 3 and a lever 92 on the side facing away from the valve body 3. The operating component 9 can swing back and forth relative to the valve body 3 between the raw water setting and the purified water setting, and during the swing, it drives the valve core 4 to move axially via the driving ramp 91. In the embodiment illustrated in the attached figure, when the operating component 9 swings towards the raw water setting, the valve core 4 moves towards the filter inlet 321 under the push of the driving ramp 91, ultimately closing the filter inlet 321; when the operating component 9 swings towards the purified water setting, the valve core 4 moves in the opposite direction, ultimately closing the raw water inlet 5111. The operating component 9 is arranged around the valve body 3, and its driving ramp 91 facing the valve body 3 and its lever 92 facing away from the valve body 3 constitute a reasonable and ingenious driving structure. When the user operates the lever 92, causing the operating component 9 to swing back and forth relative to the valve body 3 between the raw water and purified water positions, the driving inclined plane 91 effectively converts the swinging motion of the operating component 9 into the axial displacement of the valve core 4. This motion conversion method is simple and efficient, avoiding the need for complex linkages, gears, and other transmission mechanisms to achieve the same function. This reduces the number of parts, lowers product complexity and manufacturing costs, and also reduces problems caused by wear and failure of transmission components, thus improving product reliability. In a preferred embodiment, such as... Figure 3As shown, the housing can be used to form a limiting slide 13 to limit the swing angle of the operating element 9 (e.g., limited to 15°-60°). The design of using the swing of the operating element 9 to convert into the axial displacement of the valve core 4 to achieve water circuit switching is more efficient than the existing knob switching or valve core 4 swing scheme. Only a small angle reciprocating motion is needed to complete the full stroke displacement of the valve core 4, resulting in higher transmission efficiency and less effort required for operation.

[0075] Furthermore, such as Figure 1 and Figure 13 As shown, at least one of the valve body 3 and the raw water guide 5 is provided with an elastic element between itself and the valve core 4. When the operating member 9 swings towards the raw water position, the driving inclined surface 91 drives the valve core 4 to compress the elastic element; when the operating member 9 swings towards the purified water position, the elastic element drives the valve core 4 to reset. In the preferred embodiment shown in the figure, the elastic element includes a first helical spring 10 disposed between the valve body 3 and the valve core 4 and a second helical spring 20 disposed between the raw water guide 5 and the valve core 4. The two helical springs can work together to complete the reset stroke of the valve core 4. When the operating member 9 swings towards the raw water position, the driving inclined surface 91 drives the valve core 4 to compress the elastic element. The elastic element plays a buffering role in this process, absorbing the impact force during operation and preventing the valve core 4 from violently colliding with the valve body 3 and other components due to sudden force, reducing wear between components and extending the service life of the valve core 4 and related components. When the operating component 9 swings toward the water purification position, the elastic component releases its stored elastic potential energy, driving the valve core 4 to reset. This automatic reset function ensures that the water circuit switching valve assembly can quickly and accurately return to its initial state after the operation is completed, ensuring the normal operation of the water circuit system and avoiding problems such as water circuit chaos and leakage caused by the valve core 4 failing to reset in time. In addition, the presence of the elastic component gives the entire water circuit switching operation a certain degree of adaptability and fault tolerance. For example, when subjected to slight external interference or slight deviation in operating force, the elastic component can assist the valve core 4 in adjusting its position, maintaining a stable sealing and water circuit switching state, and improving the reliability and stability of the product in complex operating environments.

[0076] As a preferred embodiment of this application, such as Figure 1 , Figure 4 and Figure 8As shown, the filter chamber 12 is provided with a water inlet 121. The filter outlet 322 and the water inlet 121 are connected by a connecting pipe 30. One end of the connecting pipe 30 is inserted and sealed into the filter outlet 322, and the other end is inserted and sealed into the water inlet 121. This plug-in sealing connection method is simple and efficient. During assembly, the connection can be completed simply by accurately inserting the connecting pipe 30 into the corresponding interface. The operation is simple and does not require complicated procedures such as applying sealant or tightening threads, which greatly improves assembly efficiency and reduces assembly costs. At the same time, the plug-in sealing structure can ensure good sealing performance. It achieves sealing through the interference fit between the connecting pipe 30 and the interface or by using sealing materials (such as rubber sealing rings), effectively preventing purified water from leaking from the connection point during the flow process. This ensures the integrity and sealing of the purified water transmission path from the filter outlet 322 to the water inlet 121, ensuring that purified water can smoothly and without loss enter the filter chamber 12 for further purification treatment, thus improving the overall water purification efficiency and performance of the faucet water purifier. Moreover, this standardized plug-in sealing connection method facilitates later maintenance and replacement. When the connecting pipe 30 ages or is damaged, it can be easily pulled out and replaced without large-scale disassembly of the entire water system, further demonstrating the maintainability and ease of use of the product.

[0077] As a preferred embodiment of this application, such as Figure 1 , Figure 3 , Figure 4 , Figure 15 and Figure 16As shown, the outer casing 1 includes an upper casing 14 and a lower casing 15. The upper casing 14 is provided with a first opening 141 corresponding to the water circuit switching chamber 11 and a second opening 142 corresponding to the filter chamber 12. The first opening 141 is used to connect the water inlet 31 of the valve body 3 to the faucet, and the second opening 142 is used to install and remove the filter element 2. The upper casing 14 is equipped with a detachable cover 40 for opening or closing the second opening 142. The lower casing 15 is provided with a first water outlet area 151 and a second water outlet area 152. The first water outlet area 151 corresponds to the water outlet end of the filter element 2, and the second water outlet area 152 corresponds to the raw water outlet 5112. In this technical solution, the outer casing 1 is divided into an upper casing 14 and a lower casing 15. The upper casing 14 is provided with a first opening 141 corresponding to the water circuit switching chamber 11 and a second opening 142 corresponding to the filter chamber 12. The first opening 141 allows the water inlet 31 of the valve body 3 to be connected to a faucet. This layout makes the connection operation between the faucet and the valve body 3 simple and direct, and the connection operation can be easily performed through the first opening 141, improving installation efficiency. The second opening 142 is used for the installation and removal of the filter element 2, and is equipped with a removable cover 40. This allows users to easily open the cover 40 when the filter element 2 needs to be replaced, take out the old filter element 2 from the second opening 142, and install the new filter element 2. This simplifies the filter element 2 replacement process, reduces the user's maintenance costs, and improves the maintainability of the product. The lower housing 15 has a first water outlet zone 151 corresponding to the water outlet end of the filter element 2, and a second water outlet zone 152 corresponding to the raw water outlet 5112. This partitioned design achieves physical isolation between raw water and purified water at the outlet end, avoiding water pollution caused by mixing, ensuring users can obtain raw water and purified water that meet their needs separately, and improving the product's safety and hygiene. In a preferred embodiment, the cover 40 can be detachably connected to the upper housing 14 via clips, facilitating disassembly and assembly and improving the ease of filter element replacement. The upper housing 14 and lower housing 15 can also be connected by clips or screws for easy disassembly and maintenance. Furthermore, as... Figure 1 and Figure 2 As shown, a decorative shell 50 can also be fitted on the outside of the shell. The decorative shell 50 surrounds the joint between the upper shell 14 and the lower shell 15, beautifying the appearance and also providing protection.

[0078] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0079] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0080] The above description is merely an embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this application should be included within the scope of the claims of this application.

Claims

1. A faucet-mounted water purifier, comprising a housing, a filter element, and a water path switching valve assembly, wherein the housing has a water path switching chamber for accommodating the water path switching valve assembly and a filter chamber for accommodating the filter element, characterized in that, The water circuit switching valve assembly includes a valve body, a valve core, and a raw water guide component. The valve body has an inlet and a clean water channel. The clean water channel has a filter inlet and a filter outlet. The filter outlet is connected to the filter chamber. The raw water guide component is installed in the valve body and has a raw water channel. The raw water channel has a raw water inlet and a raw water outlet. The raw water inlet is arranged opposite to the filter inlet. The valve core is coaxially inserted through the raw water guide component and has a sealing part at one end. The valve core, by axial displacement relative to the raw water guide, causes the sealing part to open one of the filter inlet and the raw water inlet and simultaneously close the other; the water inlet is connected to the raw water inlet in the open state or the filter inlet in the open state.

2. The faucet water purifier according to claim 1, characterized in that, The valve body has an installation hole that extends from the outside to the inside to the filter inlet. The raw water guide includes a plug-in part that is inserted into the installation hole. The valve core passes through the plug-in part, and the raw water flow channel is formed in the plug-in part and surrounds the valve core.

3. The faucet water purifier according to claim 2, characterized in that, A pair of slots are provided on opposite sides of the inlet end of the mounting hole, symmetrically arranged around the axis of the mounting hole. The raw water guide is provided with radial extensions symmetrically connected to both sides of the plug-in part. The plug-in part is inserted into the mounting hole and rotated by a predetermined angle around the axis of the mounting hole, so that the radial extensions on both sides are respectively engaged in the corresponding slots, thereby achieving axial positioning.

4. The faucet water purifier according to claim 2, characterized in that, The filter inlet is provided with a first stop surface, and the raw water inlet is provided with a second stop surface. The first stop surface and the second stop surface define the axial displacement distance of the valve core. When the sealing part abuts against the first stop surface, the filter inlet is closed. When the sealing part abuts against the second stop surface, the raw water inlet is closed.

5. The faucet water purifier according to claim 2, characterized in that, The sealing part is provided with a first sealing ring, and the insertion part and the inner wall of the mounting hole are provided with a second sealing ring and a third sealing ring. The inner wall of the mounting hole is provided with a water passage hole for the raw water outlet to exit. The raw water outlet and the water passage hole are located in the isolation space between the second sealing ring and the third sealing ring. A fourth sealing ring is provided between the valve core and the raw water guide. The third sealing ring and the fourth sealing ring together prevent water from exiting to the inlet end of the mounting hole.

6. The faucet water purifier according to claim 1, characterized in that, The other end of the valve core, opposite to the sealing part, protrudes outside the valve body, forming a force-bearing end for axial displacement under force.

7. The faucet water purifier according to claim 6, characterized in that, The water circuit switching valve assembly also includes an operating component surrounding the valve body. The operating component has a driving ramp on the side facing the valve body and a lever on the side away from the valve body. The operating component can swing back and forth relative to the valve body between the raw water setting and the purified water setting, and during the swinging process, it drives the valve core to move axially through the driving ramp.

8. The faucet water purifier according to claim 7, characterized in that, At least one of the valve body and the raw water guide is provided with an elastic element between itself and the valve core. When the operating member swings toward the raw water position, the driving inclined surface drives the valve core to compress the elastic element; when the operating member swings toward the purified water position, the elastic element drives the valve core to reset.

9. The faucet water purifier according to claim 1, characterized in that, The filter chamber is provided with a water inlet, and the filter outlet and the water inlet are connected by a connecting pipe. One end of the connecting pipe is inserted and sealed in the filter outlet, and the other end is inserted and sealed in the water inlet.

10. The faucet water purifier according to any one of claims 1-9, characterized in that, The outer casing includes an upper casing and a lower casing. The upper casing has a first opening corresponding to the water circuit switching chamber and a second opening corresponding to the filter chamber. The first opening is for connecting the water inlet of the valve body to a faucet, and the second opening is for disassembling and assembling the filter element. The upper casing is equipped with a detachable cover for opening or closing the second opening. The lower casing has a first water outlet area and a second water outlet area. The first water outlet area corresponds to the water outlet end of the filter element, and the second water outlet area corresponds to the raw water outlet.

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