Filter housing structure, filter core assembly, water purifying device and installation method of filter core assembly

Abstract

The application provides a filter shell structure, a filter core assembly, a water purifying device and a mounting method of the filter core assembly, wherein the filter shell structure comprises: an inner shell having a containing cavity for containing a filter core; an outer shell sleeved outside the inner shell, the outer shell being rotatably arranged relative to the inner shell; a water inlet joint and a water outlet joint, both of which are arranged in communication with the containing cavity; and a joint member arranged on the inner shell and / or the outer shell; when the outer shell and the inner shell rotate relative to each other, the joint member is engaged with a corresponding joint mechanism on the water purifying device. The technical scheme of the application meets the requirement of the existing water purifying device on the filter core shell containing a relative rotation structure, provides a filter shell structure with a relative rotation between the inner shell and the outer shell, avoids arranging an additional driving rod and a channel for the driving rod to pass through in the filter shell, and ensures the sealing reliability of the filter shell structure.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment, and more specifically, to a filter housing structure, a filter element assembly, a water purification device, and a method for installing the filter element assembly. Background Technology

[0002] As public awareness of drinking water safety increases, the filtration precision of water filtration devices is constantly improving, leading to increasingly complex structures in water purification systems. In existing technologies, water filter housings are typically injection molded and welded together as a single unit. However, with the development of water purification technology, some water purification devices require filter cartridges with structures that can rotate relative to the filter housing, so that specific functions can be achieved simply by installing the filter cartridge.

[0003] For example, when the filter cartridge body cannot rotate, rotating the rotatable structure (such as a rotating rod) on the filter cartridge body can drive the rotating valve rod of the water purification device, thereby opening the valve of the water purification device; or drive the limiting component on the rotatable structure to achieve the snap-fit ​​installation of the filter cartridge and the water purification device; or limit the rotation of the filter cartridge body by the limiting component, and achieve other operations that can only be completed by rotating by rotating the rotatable structure on the filter cartridge.

[0004] In existing technologies, a separate rotatable drive rod is axially inserted into the filter housing, with a channel running through the housing for the drive rod. However, this channel design significantly increases the structural complexity and manufacturing difficulty of the filter housing. Existing filter housings are injection molded and welded together, typically requiring only one weld to form a single integrated structure. However, if a channel for the drive rod is incorporated into the filter housing, at least two welds are needed to weld the housing into a single unit. As a component subjected to water pressure, the seal at the weld seams of the water purifier filter cartridge is more prone to failure under high water pressure or prolonged use, even posing a risk of bursting. Therefore, this increased number of weld seams in existing technologies not only significantly reduces the structural strength of the filter housing but also affects its sealing performance. Summary of the Invention

[0005] The main objective of this invention is to provide a filter housing structure, a filter element assembly, a water purification device, and a method for installing the filter element assembly. By dividing the filter housing into an outer shell and an inner shell, and allowing the outer shell and inner shell to rotate relative to each other, the invention avoids the need for additional drive rods and channels for the drive rods to pass through the filter housing, thus ensuring the structural strength of the filter housing. This not only meets the requirements of existing water purification devices for filter housings to include a relatively rotating structure, but also features a simple filter housing structure, low manufacturing difficulty, and ensures the sealing reliability of the filter housing structure. This solves the problem of low structural strength and poor sealing performance of existing filter housings.

[0006] To achieve the above objectives, according to one aspect of the present invention, a filter housing structure is provided, comprising: an inner shell having a receiving cavity for accommodating a filter element; an outer shell sleeved outside the inner shell, the outer shell being rotatably disposed relative to the inner shell; an inlet connector and an outlet connector, both of which are connected in communication with the receiving cavity; and a coupling member disposed on the inner shell and / or the outer shell, wherein, when relative rotation occurs between the outer shell and the inner shell, the coupling member engages with a corresponding coupling mechanism on a water purification device.

[0007] Furthermore, the connecting component is a transmission component. When relative rotation occurs between the outer shell and the inner shell, the transmission component rotates synchronously with the rotating side of the outer shell and the inner shell, and drives the corresponding connecting mechanism to rotate synchronously.

[0008] Furthermore, the transmission component is mounted on the outer casing; when the outer casing rotates relative to the inner casing, the outer casing drives the transmission component to rotate synchronously, so that the transmission component controls the corresponding engagement mechanism to open or close.

[0009] Furthermore, the transmission component is located in the middle of one end of the outer casing, and the outer casing rotates relative to the inner casing around the central axis of the transmission component.

[0010] Furthermore, the connecting member is a limiting member. When relative rotation occurs between the outer shell and the inner shell, the limiting member rotates with one of the rotating parts of the outer shell and the inner shell until it engages with the corresponding connecting mechanism on the water purification device, so that the filter shell structure is limited to the water purification device.

[0011] Furthermore, the limiting member is provided on the outer shell. When the outer shell rotates relative to the inner shell, the limiting member rotates with the outer shell to engage with the corresponding engagement mechanism on the water purification device, so that the filter shell structure is limited to the water purification device; and / or, the limiting member is provided on the inner shell. When the inner shell rotates relative to the outer shell, the limiting member rotates with the inner shell to engage with the corresponding engagement mechanism on the water purification device, so that the filter shell structure is limited to the water purification device.

[0012] Furthermore, the connecting member is a limiting member. When relative rotation occurs between the outer shell and the inner shell, the limiting member engages with the corresponding connecting mechanism on the water purification device and does not rotate, so as to prevent one of the outer shell and the inner shell from rotating synchronously with the other.

[0013] Furthermore, a limiting member is provided on the outer shell. When the inner shell rotates relative to the outer shell, the limiting member engages with the corresponding engagement mechanism on the water purification device to prevent the outer shell from rotating with the inner shell; and / or, a limiting member is provided on the inner shell. When the outer shell rotates relative to the inner shell, the limiting member engages with the corresponding engagement mechanism on the water purification device to prevent the inner shell from rotating with the outer shell.

[0014] Furthermore, the outer shell is configured to form an installation cavity, and the inner shell is disposed within the installation cavity.

[0015] Furthermore, the inlet and outlet connectors are located at the same end of the inner shell, and both the inlet and outlet connectors extend out of the outer shell.

[0016] Furthermore, both the inlet and outlet connectors extend from the first end of the housing. The first end of the housing is provided with a first clearance hole and a second clearance hole. When the housing rotates, the first clearance hole clears the inlet connector, and the second clearance hole clears the outlet connector.

[0017] Furthermore, both the first clearance hole and the second clearance hole extend circumferentially along the outer casing; wherein, the first clearance hole has a first clearance groove on its wall, the first clearance groove being located between the first end and the second end of the first clearance hole, and a first stop member is provided on the outer wall of the water inlet connector, the first clearance groove being for the first stop member to pass through in the axial direction of the outer casing, and the portion of the first clearance hole without the first clearance groove engaging with the first stop member; and / or, the second clearance hole has a second clearance groove on its wall, the second clearance groove being located between the first end and the second end of the second clearance hole, and a second stop member is provided on the outer wall of the water outlet connector, the second clearance groove being for the second stop member to pass through in the axial direction of the outer casing, and the portion of the second clearance hole without the second clearance groove engaging with the second stop member.

[0018] Furthermore, the connector is provided with a first limiting part, and the outer shell is provided with a second limiting part. The first limiting part and the second limiting part are connected by snap-fit, screw-fit, or adhesive.

[0019] Furthermore, both the inlet and outlet connectors are located at the first end of the inner shell, the second end of the inner shell is provided with a first guide portion, and the second end of the outer shell is provided with a second guide portion that guides and cooperates with the first guide portion. The first guide portion and the second guide portion are nested together.

[0020] Furthermore, the top of the connector has a connecting part that connects to the corresponding connecting structure, and a spiral groove is provided on the outer side wall of the connector, which can be guided and engaged with the fixing protrusion of the water purification device.

[0021] Furthermore, an installation status indicator structure is provided between the second end of the inner shell and the second end of the outer shell. The installation status indicator structure is used to indicate that the connecting parts are in the transmission position of opening or closing the corresponding connecting structure, and / or, the installation status indicator structure is used to indicate whether the filter shell structure is installed in place on the water purification device.

[0022] Furthermore, the installation status indicator structure includes an indicator mark on the inner shell and a through hole on the outer shell. The indicator mark is located on the rotation trajectory of the through hole. When the through hole and the indicator mark correspond, the indicator mark is exposed through the through hole, indicating that the connecting member is in the position of closing the corresponding connecting structure.

[0023] Furthermore, the outer end face of the first end of the inner shell is provided with a mounting groove for mounting the bottom end of the connector. The bottom end of the connector has an annular flange, which moves relative to the inner shell along the axial direction of the outer shell.

[0024] Furthermore, an operating part is provided on the outer casing, which drives the outer casing to rotate.

[0025] Furthermore, the connector is disposed at the first end of the housing, and a reinforcing part is provided on the first end of the housing, the reinforcing part being located on the outside of the connector.

[0026] Furthermore, the reinforcement includes a reinforcing plate embedded in the first end of the housing.

[0027] According to another aspect of the present invention, a filter element assembly is provided, including a filter housing structure and a filter element disposed within the filter housing structure, wherein the filter housing structure is the filter housing structure described above.

[0028] Furthermore, a water inlet cavity is formed between the filter element and the inner wall of the inner shell, and a clean water cavity is formed in the hollow inner cavity of the filter element. The water inlet connector is connected to the water inlet cavity, and the water outlet connector is connected to the clean water cavity.

[0029] Furthermore, the filter element includes a filter element body, a first end cap disposed at a first end of the filter element body, and a second end cap disposed at a second end of the filter element body. The first end cap is sealed to the first end of the inner shell, and the second end cap is supported to the second end of the inner shell.

[0030] According to another aspect of the present invention, a water purification device is provided, including a mounting base, an inlet valve, a bypass valve, and an outlet valve. The inlet valve, the bypass valve, and the outlet valve are all disposed on the mounting base. A filter element assembly is mounted on the mounting base. The filter element assembly is the aforementioned filter element assembly, and the corresponding engagement mechanism is the bypass valve.

[0031] According to another aspect of the present invention, a method for installing a filter element assembly on a water purification device is provided. The filter element assembly includes the aforementioned filter housing structure. The water purification device includes a mounting base, an inlet valve, an outlet valve, and corresponding engagement mechanisms. The inlet valve, outlet valve, and corresponding engagement mechanisms are all disposed on the mounting base. The installation method includes: connecting the inlet connector of the filter element assembly to the inlet valve of the water purification device, connecting the outlet connector of the filter element assembly to the outlet valve of the water purification device, and engaging the engagement member with the corresponding engagement mechanism on the water purification device; rotating the housing, causing the housing to rotate synchronously with the engagement member, and simultaneously, causing the engagement member to rotate synchronously with the corresponding engagement mechanism; simultaneously, the filter element assembly moves axially toward the direction closer to the mounting base, the inlet connector opens the inlet valve, and the outlet connector opens the outlet valve.

[0032] The filter housing structure, according to the technical solution of this invention, includes an inner shell, an outer shell, an inlet connector, an outlet connector, and a connecting member. The inner shell has a receiving cavity for accommodating the filter element. The outer shell is fitted over the inner shell and is rotatably disposed relative to the inner shell. Both the inlet and outlet connectors communicate with the receiving cavity. The connecting member is disposed on the inner shell and / or the outer shell. When relative rotation occurs between the outer and inner shells, the connecting member engages with the corresponding engagement mechanism on the water purification device. Thus, by dividing the filter housing into an outer shell and an inner shell, and allowing rotation between them, even when the inlet and outlet connectors of the filter element cannot rotate, the rotational opening and closing operation of the corresponding engagement mechanism of the water purification device can still be achieved. This avoids the need for additional drive rods and channels for the drive rods to pass through. The filter housing structure is simple, easy to manufacture, and has few welds, meeting the requirements of existing water purification devices for filter housings with relative rotational structures. It also improves the structural strength of the filter housing structure, ensures the sealing reliability of the filter housing structure, reduces the risk of breakage, and solves the problem of low strength in existing filter housing structures affecting their sealing performance. Attached Figure Description

[0033] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0034] Figure 1 A three-dimensional structural schematic diagram of the second shell cover after it is opened from the outer shell body according to an embodiment of the filter shell structure of the present invention is shown;

[0035] Figure 2 It shows Figure 1 A three-dimensional structural diagram of the filter housing structure from another perspective after the second cover is opened from the outer shell body;

[0036] Figure 3 A cross-sectional schematic diagram of an embodiment of the filter housing structure according to the present invention is shown;

[0037] Figure 4 An exploded structural diagram of an embodiment of a filter element assembly according to the present invention is shown;

[0038] Figure 5 It shows Figure 4 An enlarged schematic diagram of point A of the filter element assembly;

[0039] Figure 6 A cross-sectional schematic diagram of an embodiment of a filter element assembly according to the present invention is shown;

[0040] Figure 7 It shows Figure 6 An enlarged schematic diagram of point B of the filter element assembly;

[0041] Figure 8 It shows Figure 6 An enlarged schematic diagram of point C of the filter element assembly;

[0042] Figure 9 A three-dimensional structural diagram of the filter element assembly according to the present invention is shown after longitudinal half-section.

[0043] Figure 10 A bottom view schematic diagram is shown when the transmission component of an embodiment of the filter element assembly according to the present invention opens the bypass valve;

[0044] Figure 11 A bottom view schematic diagram is shown when the transmission component of an embodiment of the filter element assembly according to the present invention closes the bypass valve;

[0045] Figure 12 A cross-sectional schematic diagram of the mounting base, filter element assembly, inlet valve, bypass valve, and outlet valve when the transmission component of an embodiment of the water purification device according to the present invention opens the bypass valve is shown.

[0046] Figure 13 A cross-sectional schematic diagram of the mounting base, filter element assembly, inlet valve, bypass valve, and outlet valve when the transmission component of an embodiment of the water purification device according to the present invention closes the bypass valve is shown.

[0047] Figure 14 It shows Figure 13 A three-dimensional structural diagram of the filter element assembly's mounting base, inlet valve, bypass valve, and outlet valve.

[0048] Figure 15 It shows Figure 14 A three-dimensional structural diagram showing the longitudinal section of the filter element assembly's mounting base, inlet valve, bypass valve, and outlet valve.

[0049] Figure 16 It shows Figure 14 A partial three-dimensional structural diagram of the longitudinal section of the filter element assembly mounting base and bypass valve.

[0050] The above figures include the following reference numerals:

[0051] 10. Inner shell; 11. Receiving cavity; 12. First guide section; 13. Partition plate; 14. Installation space; 15. Inner shell body; 16. First shell cover; 17. Support cylinder; 18. Installation groove; 19. Installation cavity;

[0052] 20. Outer shell; 21. First clearance hole; 211. First clearance groove; 22. Second clearance hole; 221. Second clearance groove; 23. Second limiting part; 24. Second guide part; 25. Operating part; 26. Reinforcing part; 27. Outer shell body; 28. Second shell cover;

[0053] 30. Filter element; 31. Inlet chamber; 32. Purified water chamber; 33. Filter element body; 34. First end cap; 35. Second end cap;

[0054] 41. Water inlet connector; 411. First connecting port; 412. First stop; 42. Water outlet connector; 421. Second connecting port; 422. Second stop; 43. Sealing ring;

[0055] 50. Connecting part; 51. First limiting part; 52. Connecting part; 53. Spiral groove; 54. Annular flange;

[0056] 60. Installation status indicator structure; 61. Indicator mark; 62. Through hole;

[0057] 71. Mounting base; 72. Bypass valve; 73. Inlet valve; 74. Outlet valve; 75. Fixing protrusion. Detailed Implementation

[0058] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0059] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0060] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0061] like Figures 1 to 8 , Figure 12 and Figure 13 As shown, this application provides a filter housing structure. An embodiment of the filter housing structure includes: an inner shell 10, an outer shell 20, an inlet connector 41, an outlet connector 42, and a connecting member 50. The inner shell 10 has a receiving cavity 11 for accommodating a filter element 30. The outer shell 20 is sleeved on the inner shell 10 and is rotatably disposed relative to the inner shell 10. Both the inlet connector 41 and the outlet connector 42 are connected to the receiving cavity 11. The connecting member 50 is disposed on the outer shell 20 and rotates synchronously with the outer shell 20. When relative rotation occurs between the outer shell 20 and the inner shell 10, the connecting member 50 engages with a corresponding engaging mechanism on the water purification device. In this way, by dividing the filter housing into an outer shell and an inner shell, which can rotate relative to each other, it not only meets the requirements of existing water purification devices for filter housings to include a relatively rotating structure, but also avoids the need for additional drive rods and channels for drive rods to pass through. The filter housing structure is simple and easy to manufacture, ensuring the structural strength and sealing reliability of the filter housing, and solving the problem of low structural strength of existing filter housings that affects the sealing performance of the filter housing. The connecting part 50 is a joint.

[0062] Furthermore, the connecting member 50 is a transmission member. When relative rotation occurs between the outer shell 20 and the inner shell 10, the transmission member rotates synchronously with either the outer shell 20 or the inner shell 10, driving the corresponding connecting mechanism to rotate synchronously. Through the transmission member, the relative rotation between the outer shell and the inner shell is effectively converted into rotation of the corresponding connecting mechanism of the water purification device, thereby controlling specific functions of the water purification device (such as opening or closing the corresponding connecting mechanism). This design avoids the need for additional drive rods and channels for them to pass through, reducing structural complexity and manufacturing difficulty, ensuring the overall structural strength of the filter housing, simplifying the internal layout of the water purification device, and improving operational convenience and purification efficiency.

[0063] Furthermore, the transmission component is mounted on the outer casing 20. When the outer casing 20 rotates relative to the inner casing 10, it drives the transmission component to rotate synchronously, thereby controlling the opening or closing of the corresponding engagement mechanism. This design directly converts the rotation of the outer casing into the rotation of the transmission component, which in turn controls the corresponding engagement mechanism of the water purification device. This simplifies the power transmission process, avoids additional intermediate transmission components, and improves the efficiency and stability of power transmission. Simultaneously, the tight connection between the transmission component and the outer casing prevents possible displacement during transmission, enhancing the reliability and accuracy of the transmission.

[0064] Furthermore, the transmission component is located at the middle of one end of the outer shell 20, and the outer shell 20 rotates relative to the inner shell 10 around the central axis L1 of the transmission component. By placing the transmission component in the middle of the outer shell 20, power transmission and functional control are achieved directly by utilizing the rotation of the outer shell 20 relative to the inner shell 10, avoiding the complex structure of additional drive rods and channels for drive rods to pass through, as required in existing designs. This simplified design not only reduces the number of components in the manufacturing process and reduces potential sealing failure points, but also lowers the difficulty of manufacturing and assembly, production costs, and improves manufacturing efficiency. Applying the technical solutions of some embodiments of this application, the filter housing structure includes: an inner shell 10, an outer shell 20, an inlet connector 41, an outlet connector 42, and a transmission component. The installation process of the filter housing on the water purification device: the inlet connector 41 and the outlet connector 42 correspond to the inlet valve 73 and the outlet valve 74 of the water purification device, respectively, and the transmission component engages with the corresponding engagement mechanism on the water purification device; the outer shell 20 is rotated, and the transmission component drives the corresponding engagement mechanism to rotate; at the same time, the transmission component moves along the axis L2 of the outer shell 20 towards the direction of the water purification device, driving the outer shell 20 to move as a whole, so that the inner shell 10 located inside the outer shell 20 moves with the outer shell 20, so that the inlet connector 41 is connected to the inlet valve 73 of the water purification device, and the inlet valve 73 is opened by the inlet connector 41; the outlet connector 42 is connected to the outlet valve 74 of the water purification device, and the outlet valve 74 is opened by the outlet connector 42. At this time, the transmission component closes the corresponding engagement mechanism, and the water to be purified flows from the inlet valve 73 into the inlet connector 41, then flows into the inner shell 10. After being filtered by the filter element 30 inside the inner shell 10, the water to be purified is purified water, which flows into the outlet connector 42 and then into the outlet valve 74. This application provides a filter shell structure with a relatively rotating inner shell and outer shell. When the inlet connector 41 and the outlet connector 42 cannot rotate, the outer shell 20 drives the transmission component to rotate, thereby driving the corresponding engagement mechanism on the water purification device to rotate to open and close the corresponding engagement mechanism. This application can still achieve the rotational opening and closing operation of the corresponding engagement mechanism even when the inlet and outlet connectors cannot rotate; there is no need to set up an additional drive rod and a channel for the drive rod to pass through. The filter shell structure is simple, easy to manufacture, and has fewer welds, which improves the structural strength of the filter shell structure, ensures the sealing reliability of the filter shell structure, and reduces the risk of breakage. During the replacement of the filter element, only the outer shell needs to be rotated, making the replacement of the filter element simpler.

[0065] In some embodiments of this application, the outer shell 20 being fitted outside the inner shell 10 means that the entire inner shell 10 is disposed inside the outer shell 20, i.e., the outer shell 20 surrounds the mounting cavity 19, and the inner shell 10 is disposed within the mounting cavity 19. Alternatively, the main body of the inner shell 10 is disposed inside the outer shell 20, and the remaining part of the inner shell 10 protrudes from the outer shell 20. In another embodiment of the filter housing structure, the connecting member 50 is a limiting member. When relative rotation occurs between the outer shell 20 and the inner shell 10, the limiting member rotates with the rotating side of the outer shell 20 and the inner shell 10 until it engages with the corresponding connecting mechanism on the water purification device, so that the filter housing structure is limited to the water purification device. By providing a limiting member on the inner shell or the outer shell, the limiting member rotates with the rotating side and rotates to the snap-fit ​​position, realizing the snap-fit ​​of the filter element structure on the water purification device, thereby limiting the installation position of the filter housing structure on the water purification device, simplifying the installation process of the filter housing structure, and improving the accuracy and efficiency of installation.

[0066] Furthermore, a limiting member is provided on the outer shell 20. When the filter housing structure is installed on the water purification device, due to installation and structural requirements, the inner shell 10 remains stationary while the outer shell 20 rotates relative to the inner shell 10. The limiting member rotates with the outer shell 20 until it engages with the corresponding engagement mechanism on the water purification device, thus limiting the filter housing structure to the water purification device and completing the installation of the filter housing structure on the water purification device. Alternatively, the limiting member is provided on the inner shell 10. When the filter housing structure is installed on the water purification device, due to installation and structural requirements, the outer shell 20 remains stationary while the inner shell 10 rotates relative to the outer shell 20. The limiting member rotates with the inner shell 10 until it engages with the corresponding engagement mechanism on the water purification device, thus limiting the filter housing structure to the water purification device and completing the installation of the filter housing structure on the water purification device. Depending on its placement, the limiting member can adapt to different types of filter housing structures and water purification devices, providing a flexible limiting method. Both the outer and inner shell limiting components ensure accurate installation and positioning of the filter housing structure on the water purification device, reducing installation difficulty and improving the interchangeability of the filter housing structure. At the same time, this limiting method eliminates the need for additional fixing devices, reducing the internal complexity of the water purification device and improving the convenience of assembly and maintenance.

[0067] In another embodiment of the filter housing structure, the connecting member 50 is a limiting member. When relative rotation occurs between the outer shell 20 and the inner shell 10, the limiting member engages with the corresponding connecting mechanism on the water purification device and does not rotate, thus preventing one of the outer shell 20 and the inner shell 10 from rotating synchronously with the other. By providing a limiting member on the inner shell or the outer shell to prevent one from rotating synchronously with the other, the relative rotation between the inner shell and the outer shell is ensured, thereby ensuring the stability of the filter housing structure on the water purification device. The static engagement of the limiting member with the corresponding connecting mechanism can prevent misoperation, protect the filter element from damage, and also ensure the sealing performance of the filter housing structure.

[0068] Furthermore, a limiting member is provided on the outer shell 20. When the inner shell 10 rotates relative to the outer shell 20, the limiting member engages with the corresponding engagement mechanism on the water purification device to prevent the outer shell 20 from rotating with the inner shell 10. Alternatively, the limiting member is provided on the inner shell 10. When the outer shell 20 rotates relative to the inner shell 10, the limiting member engages with the corresponding engagement mechanism on the water purification device to prevent the inner shell 10 from rotating with the outer shell 20. This arrangement of the limiting member provides a limiting option when different components inside the filter housing structure rotate relative to each other. By providing the limiting member on the outer shell 20 and / or the inner shell 10, the rotational freedom of the outer shell or inner shell can be specifically controlled, ensuring the functionality and stability of the filter housing structure in the water purification device.

[0069] like Figures 1 to 6 As shown, the inlet connector 41 and the outlet connector 42 are located at the same end of the inner shell 10. This design simplifies the water circuit layout of the filter housing structure, concentrating the inlet and outlet functions at the same end of the inner shell. This reduces the complexity of the filter housing structure, facilitates production and assembly, and improves the intuitiveness and convenience of operation. Both the inlet connector 41 and the outlet connector 42 extend through the outer shell 20, avoiding the use of existing additional drive rods and channels for the drive rods to pass through. This reduces manufacturing costs and improves the sealing reliability of the filter housing structure, while ensuring the water circuit connection of the filter housing structure in the water purification device.

[0070] like Figures 1 to 6 As shown, both the inlet connector 41 and the outlet connector 42 extend from the first end of the housing 20. The fact that both the inlet connector 41 and the outlet connector 42 extend from the same end of the housing 20 simplifies the water circuit layout and connection, avoids the installation difficulties and maintenance inconveniences caused by complex connectors, and also reduces the space occupied inside the water purification device, making the overall design more compact and efficient. The first end of the housing 20 is provided with a first clearance hole 21 and a second clearance hole 22. When the housing 20 rotates, the first clearance hole 21 avoids the inlet connector 41, and the second clearance hole 22 avoids the outlet connector 42. This prevents interference between the inlet connector 41 and the outlet connector 42 and the housing 20 during rotation, facilitating the smooth rotation of the transmission components by the housing 20.

[0071] like Figures 1 to 8As shown, both the first clearance hole 21 and the second clearance hole 22 extend circumferentially along the outer casing 20. Thus, during the rotation of the transmission component driven by the outer casing 20, the first clearance hole 21 can sufficiently avoid the water inlet connector 41, and the second clearance hole 22 can sufficiently avoid the water outlet connector 42. A first clearance groove 211 is provided on the wall of the first clearance hole 21, located between the first end and the second end of the first clearance hole 21. A first stop member 412 is provided on the outer wall of the water inlet connector 41. Along the axis L2 of the outer casing 20, the first clearance groove 211 allows the first stop member 412 to pass through, and the portion of the first clearance hole 21 without the first clearance groove 211 engages with the first stop member 412. The second clearance hole 22 has a second clearance groove 221 on its wall. The second clearance groove 221 is located between the first end and the second end of the second clearance hole 22. A second stop 422 is provided on the outer wall of the water outlet connector 42. In the direction of the axis L2 of the outer casing 20, the second clearance groove 221 allows the second stop 422 to pass through, and the portion of the wall of the second clearance hole 22 without the second clearance groove 221 engages with the second stop 422. Both the first clearance hole 21 and the second clearance hole 22 are preferably arc-shaped holes.

[0072] In the above structure, in the direction of axis L2 of the outer shell 20, during the process of the outer shell 20 being fitted over the inner shell 10, the first clearance groove 211 allows the first stop 412 to pass through, and the second clearance groove 221 allows the second stop 422 to pass through. Thus, the first stop 412 is located on the side of the first clearance hole 21 away from the inner shell 10, and the second stop 422 is located on the side of the second clearance hole 22 away from the inner shell 10. Furthermore, during the switching between the position where the first end of the first clearance hole 21 mates with the water inlet connector 41 and the position where the second end of the first clearance hole 21 mates with the water inlet connector 41, the portion of the first clearance hole 21 without the first clearance groove 211 engages with the first stop 412, preventing the first stop 412 from dislodging from the first clearance hole 21. Similarly, during the switching between the position where the first end of the second clearance hole 22 mates with the water outlet connector 42 and the position where the second end of the second clearance hole 22 mates with the water outlet connector 42, the portion of the wall of the second clearance hole 22 without the second clearance groove 221 engages with the second stop 422, preventing the second stop 422 from dislodging from the second clearance hole 22, thereby preventing the outer shell 20 from moving relative to the inner shell 10 along its axis L2.

[0073] like Figures 1 to 5As shown, the transmission component is provided with a first limiting part 51, and the outer casing 20 is provided with a second limiting part 23. The first limiting part 51 and the second limiting part 23 are connected by snap-fit, screw-fit, or adhesive. This ensures that the transmission component and the outer casing 20 are limited together and can rotate synchronously, avoiding loosening and misalignment during the rotation of the transmission component driven by the outer casing 20, and improving transmission efficiency and the reliability of the limiting fit.

[0074] In some embodiments of this application, one of the first limiting part 51 and the second limiting part 23 is a limiting protrusion and the other is a limiting groove.

[0075] like Figure 3 , Figures 5 to 8 As shown, both the inlet connector 41 and the outlet connector 42 are located at the first end of the inner shell 10. A first guide portion 12 is provided at the second end of the inner shell 10, and a second guide portion 24, which guides and cooperates with the first guide portion 12, is provided at the second end of the outer shell 20. The first guide portion 12 and the second guide portion 24 are nested together. The guiding cooperation between the first guide portion 12 and the second guide portion 24 ensures the smoothness and accuracy of the rotation of the outer shell 20 relative to the inner shell 10, helps improve the accuracy of the rotation of the transmission component around the axis L2 of the outer shell 20, and thus ensures the accurate operation of opening or closing the corresponding engagement mechanism (such as the bypass valve 72 described below).

[0076] It should be noted that the aforementioned nested fit refers to a concave-convex fit, that is, one of the first guide portion 12 and the second guide portion 24 is a guide convex circle or guide ring, and the other is a groove structure that nests with the guide convex circle or guide ring. When the second guide portion 24 is a guide ring, the first guide portion 12 is a groove structure, and the bottom of the groove structure protrudes towards the inside of the guide ring. This ensures that the inner shell 10 and the outer shell 20 can be accurately aligned in their nested positions during assembly, effectively limiting the relative movement of the outer shell 20 relative to the inner shell 10 in directions other than the axis L2 of the outer shell 20, thus improving the stability of the rotation of the outer shell 20. When the user rotates the outer shell 20, they can feel the guiding effect, improving the accuracy of operation and user-friendliness. At the same time, good guidance reduces resistance during operation, making the operation process smoother and less strenuous. Furthermore, the nested fit between the guide ring and the groove structure reduces friction of the outer shell 20 during rotation relative to the inner shell 10, avoiding possible wear and positioning misalignment during long-term use, thereby improving the durability and stability of the filter shell structure.

[0077] like Figure 5 , Figures 12 to 16As shown, to facilitate the linkage between the transmission component and the bypass valve 72, the top of the transmission component has a connecting portion 52 that connects to the bypass valve 72. A spiral groove 53 is provided on the outer wall of the transmission component. The spiral groove 53 can guide and engage with the fixing protrusion 75 of the water purification device, allowing the transmission component to move along the axis L2 of the outer casing 20 during rotation, thereby controlling the opening or closing of the bypass valve. The connecting portion 52 is preferably a flat groove, into which the end of the valve stem of the bypass valve 72 is inserted, so that the transmission component and the bypass valve 72 are linked together.

[0078] like Figure 2 , Figures 9 to 13 As shown, to facilitate user confirmation that the filter cartridge on the water purifier is properly installed, an installation status indicator structure 60 is provided between the second end of the inner shell 10 and the second end of the outer shell 20. The installation status indicator structure 60 is used to indicate whether the transmission component is in the transmission position of opening or closing the bypass valve 72. In this embodiment, to facilitate user identification of the installation status indicator structure 60, the outer shell 20 is made of a transparent material.

[0079] like Figure 2 , Figures 9 to 13 As shown, the installation status indicator structure 60 includes an indicator mark 61 on the inner shell 10 and a through hole 62 on the outer shell 20. The indicator mark 61 is located on the rotation trajectory of the through hole 62. When the through hole 62 and the indicator mark 61 correspond, the indicator mark 61 is exposed through the through hole 62, indicating that the transmission component is in the open or closed position of the bypass valve 72. Through the cooperation of the indicator mark 61 and the through hole 62, the user can intuitively judge whether the transmission component is in the correct position of opening or closing the bypass valve 72. When the transmission component is in the correct position of opening or closing the bypass valve 72, the indicator mark 61 is exposed through the through hole 62, providing the user with clear operating guidance and avoiding the bypass valve 72 not being fully closed or opened due to inaccurate position of the transmission component, thus ensuring the normal operation of the water purification process.

[0080] Specifically, indicator 61 consists of an unlocked sign and a locked sign spaced apart, and through holes 62 correspond to the unlocked sign and the locked sign respectively. When the housing 20 rotates, when the through hole 62 corresponds to the unlocked sign, the unlocked sign is exposed through the through hole 62, indicating that the transmission component is in the position where the bypass valve 72 is open, and the water inlet connector 41 is separated from the water inlet valve 73 of the water purifier, and the water outlet connector 42 is separated from the water outlet valve 74 of the water purifier. When the through hole 62 corresponds to the locked sign, the locked sign is exposed through the through hole 62, indicating that the transmission component is in the position where the bypass valve 72 is closed, and the water inlet connector 41 is connected to the water inlet valve 73 of the water purifier, and the water outlet connector 42 is connected to the water outlet valve 74 of the water purifier.

[0081] like Figure 6 , Figure 7 , Figure 12 and Figure 13 As shown, the connection between the inlet connector 41 and the first end of the inner shell 10 forms a first communication port 411, and the connection between the outlet connector 42 and the first end of the inner shell 10 forms a second communication port 421. A partition 13 is provided on the end wall of the first end of the inner shell 10, and an installation space 14 for installing the filter element 30 is formed inside the inner shell 10. One end of the filter element 30 is sealed and installed between the partition 13 and the inner wall of the inner shell 10. The first communication port 411 connects the cavity between the outer side of the filter element 30 and the inner wall of the inner shell 10, and the second communication port 421 connects the internal cavity of the filter element 30. The design of the partition 13 and the installation space 14 optimizes the installation layout of the filter element 30, ensures a reasonable flow path of water from the inlet connector 41 to the outlet connector 42, and makes the replacement and maintenance of the filter element 30 more convenient, thereby improving the water treatment efficiency of the water purification device.

[0082] like Figures 1 to 6 As shown, an operating part 25 is provided on the outer casing 20, which drives the outer casing 20 to rotate. The operating part 25 makes the rotation of the outer casing 20 more convenient. The operating part 25 is preferably a handle.

[0083] like Figures 1 to 6 , Figure 12 and Figure 13 As shown, the transmission component is located at the first end of the housing 20. A reinforcing portion 26 is provided at the first end of the housing 20, surrounding the transmission component and enhancing its structural strength. This ensures the stability of the transmission component under stress, guaranteeing its stable engagement with the bypass valve 72 and ensuring the filter housing structure can be reliably installed on the mounting base 71 of the water purification device. The reinforcing portion 26 can be a portion of the housing wall at the first end of the housing 20, with a thickness greater than the remaining portion. Alternatively, the reinforcing portion 26 can be a reinforcing plate or rib located at the first end of the housing 20. When the reinforcing portion 26 is a reinforcing plate at the first end of the housing 20, the reinforcing plate is embedded into the first end of the housing 20 through injection molding. This injection molding process not only ensures a tight fit between the reinforcing plate and the housing 20 but also simplifies the manufacturing process of the filter housing structure, reduces assembly steps, increases production efficiency, and contributes to a compact structure. The reinforcing plate is preferably a metal plate.

[0084] Specifically, the reinforcing plate includes a ring plate surrounding the outside of the transmission component and two T-shaped plates connecting both sides of the ring plate. The vertical section of each T-shaped plate connects to the outside of the ring plate, and the horizontal section of each T-shaped plate extends circumferentially along the outer shell 20. The addition of the reinforcing plate significantly improves the structural strength of the first end of the outer shell 20. In particular, the ring plate surrounding the outside of the transmission component provides additional support, reducing deformation and wear during transmission, and improving the stability of the transmission component and the durability of the overall structure. The T-shaped plate design provides stable guidance for the transmission component, ensuring accurate alignment during movement and rotation along the axis L2 of the outer shell 20, which helps improve transmission efficiency and reduce transmission resistance.

[0085] In some embodiments of this application, a mounting groove 18 for mounting the bottom end of a transmission component is provided on the outer end face of the first end of the inner shell 10. The bottom end of the transmission component has an annular flange 54, which engages with a stop at the first end of the outer shell 20 along the axis L2 direction to restrict the movement of the transmission component relative to the inner shell 10 along the axis L2 direction of the outer shell 20. A first limiting part 51 is provided on the annular flange 54, and a second limiting part 23 is provided on the first end of the outer shell 20.

[0086] In some embodiments of this application, the outer shell 20 includes an outer shell body 27 and a second shell cover 28 disposed at the opening of the outer shell body 27. The inner shell 10 passes through the opening of the outer shell body 27 and enters the outer shell body 27. The second shell cover 28 covers the opening of the outer shell body 27, and the water inlet connector 41 and water outlet connector 42 on the inner shell 10 both pass through the second shell cover 28. The first clearance hole 21 and the second clearance hole 22 are both disposed on the second shell cover 28. The inner shell 10 includes an inner shell body 15 that accommodates the filter element 30 and a first shell cover 16 disposed at the opening of the inner shell body 15.

[0087] This application also provides a filter element assembly, such as Figures 4 to 11 As shown, the embodiment of the filter cartridge assembly includes a filter housing structure and a filter cartridge 30 disposed within the filter housing structure, the filter housing structure being the aforementioned filter housing structure. When the outer shell 20 and inner shell 10 of the aforementioned filter housing structure rotate relative to each other, the connecting member 50 engages with the corresponding connecting mechanism on the water purification device. Thus, by dividing the filter housing into an outer shell and an inner shell, and allowing the outer shell and inner shell to rotate relative to each other, an additional drive rod and a channel for the drive rod to pass through are avoided at the center of the filter housing, ensuring the structural strength of the filter housing. This not only meets the requirements of existing water purification devices for filter housings to include a relative rotation structure, but also features a simple filter housing structure, low manufacturing difficulty, and ensures the sealing reliability of the filter housing structure, enabling the filter cartridge assembly including this filter housing structure to achieve the same technical effect.

[0088] like Figures 4 to 11As shown, a water inlet chamber 31 is formed between the filter element 30 and the inner wall of the inner shell 10, and a purified water chamber 32 is formed within the hollow inner cavity of the filter element 30. Separating the water inlet chamber 31 and the purified water chamber 32 ensures that the water flow can fully contact the filter element 30 as it passes through, thereby improving filtration efficiency. The water inlet connector 41 is connected to the water inlet chamber 31, and the water outlet connector 42 is connected to the purified water chamber 32. With the purified water chamber 32, formed within the hollow inner cavity, capable of holding a sufficient amount of purified water, the adsorption surface area is increased, thereby increasing the water flow rate from the water outlet connector 42.

[0089] like Figures 4 to 11 As shown, the filter element 30 includes a filter element body 33, a first end cap 34 disposed at a first end of the filter element body 33, and a second end cap 35 disposed at a second end of the filter element body 33. The first end cap 34 is sealed to the first end of the inner shell 10, and the second end cap 35 is supported to the second end of the inner shell 10, ensuring the sealing and stability between the filter element 30 and the inner shell 10, and preventing unfiltered water from flowing directly out of the outlet connector 42 during water treatment, thus affecting the filtration effect. A sealing ring 43 is provided on the first end cap 34, and the first end cap 34 is sealed to the first end of the inner shell 10 through the sealing ring 43. A support cylinder 17 is provided on the second end of the inner shell 10 to support the second end cap 35. The filter element body 33 is preferably a hollow carbon rod.

[0090] This application also provides a water purification device, such as Figures 12 to 16 As shown, an embodiment of the water purification device includes a mounting base 71, an inlet valve 73, a bypass valve 72, and an outlet valve 74. The inlet valve 73, bypass valve 72, and outlet valve 74 are all mounted on the mounting base 71. A filter element assembly, as described above, is mounted on the mounting base 71. When the outer shell 20 and inner shell 10 of the filter element assembly rotate relative to each other, the connecting member 50 engages with the corresponding engaging mechanism on the water purification device. Thus, by dividing the filter housing into an outer shell and an inner shell, and allowing them to rotate relative to each other, the need for additional drive rods and channels for the drive rods to pass through is avoided, ensuring the structural strength of the filter housing. This not only meets the requirements of existing water purification devices for filter housings to include a relative rotation structure, but also results in a simple filter housing structure, low manufacturing difficulty, and ensures the sealing reliability of the filter housing structure, enabling the water purification device with the filter element assembly to achieve the same technical effect. A fixing protrusion 75 is provided on the mounting base 71, and the fixing protrusion 75 extends radially towards the axis of the bypass valve 72.

[0091] This application also provides a method for installing a filter cartridge assembly on a water purification device, such as... Figures 12 to 16As shown, the filter element assembly includes the aforementioned filter housing structure. The water purification device includes a mounting base 71, an inlet valve 73, an outlet valve 74, and corresponding connecting mechanisms. The inlet valve 73, the outlet valve 74, and the corresponding connecting mechanisms are all mounted on the mounting base 71. The installation method includes: connecting the inlet connector 41 of the filter element assembly to the inlet valve 73 of the water purification device, connecting the outlet connector 42 of the filter element assembly to the outlet valve 74 of the water purification device, and engaging the connecting member 50 with the corresponding connecting mechanism on the water purification device; rotating the outer shell 20, which drives the connecting member 50 to rotate synchronously, and simultaneously, the connecting member 50 drives the corresponding connecting mechanism to rotate synchronously; at the same time, the filter element assembly moves axially towards the mounting base 71, the inlet connector 41 opens the inlet valve 73, and the outlet connector 42 opens the outlet valve 74. Thus, because the filter cartridge assembly includes the aforementioned filter housing structure, which divides the filter housing into an outer shell and an inner shell that can rotate relative to each other, it avoids the need for additional drive rods and channels for the drive rods to pass through the filter housing. This ensures the structural strength of the filter housing, not only meeting the requirements of existing water purification devices for filter housings with relative rotation structures, but also offering a simple structure, low manufacturing difficulty, and guaranteed sealing reliability. This method of installing the filter cartridge assembly on a water purification device achieves the same technical effect.

[0092] Specifically, when the filter element assembly is not installed in the mounting base 71, the bypass valve 72 is in the open state, the bypass in the mounting base 71 is connected, the inlet valve 73 and the outlet valve 74 are both in the closed state, and the water enters directly from the inlet of the mounting base 71 through the bypass valve 72 and flows out to the outlet of the mounting base 71.

[0093] When the filter element assembly is installed in the mounting base 71, the connecting part on the transmission component is linked with the valve stem of the bypass valve 72. Rotating the housing 20 drives the transmission component to rotate, thereby driving the valve stem of the bypass valve 72 to rotate. At the same time as the valve stem of the bypass valve 72 rotates, the transmission component undergoes axial displacement toward the mounting base 71, and the filter element assembly also undergoes synchronous axial displacement toward the mounting base 71. At this time, the spiral groove 53 is guided and engaged with the fixed protrusion 75 on the mounting base 71. As the transmission component rotates, the spiral groove 53 slides relative to the fixed protrusion 75. At this time, the transmission component rotates relative to the fixed protrusion 75 and displaces toward the mounting base 71 along the axis L2 of the housing 20.

[0094] When the filter cartridge assembly is installed in place, the lock indicator is revealed through the through hole, indicating to the user that the filter cartridge has been installed in the water purification device. At this time, the bypass valve 72 is completely closed, and the bypass is shut off. The inlet valve 73 is connected to the inlet connector 41, and the inlet valve 73 is pushed open by the inlet connector 41, so that the inlet valve 73 is connected to the inlet connector 41. The outlet valve 74 is connected to the outlet connector 42, and the outlet valve 74 is pushed open by the outlet connector 42, so that the outlet valve 74 is connected to the outlet connector 42. Water enters the inlet valve 73 through the inlet port of the mounting base 71, passes through the inlet valve 73 and enters the inlet connector 41, enters the inlet chamber 31 through the inlet connector 41, is filtered by the filter cartridge 30 and enters the purified water chamber 32, then flows through the outlet connector 42 to the outlet valve 74, and then flows out through the outlet port of the mounting base 71.

[0095] When the filter element assembly is removed from the mounting base 71, the reverse rotation of the housing 20 drives the transmission component to rotate, thereby driving the valve stem of the bypass valve 72 to rotate. At the same time as the valve stem of the bypass valve 72 rotates, the transmission component undergoes axial displacement away from the inlet and outlet of the mounting base 71. Simultaneously, the filter element also undergoes synchronous axial displacement away from the inlet and outlet of the mounting base 71. As the transmission component rotates, the spiral groove 53 rotates and slides relative to the fixed protrusion 75. At this time, the transmission component rotates relative to the fixed protrusion 75 and simultaneously displaces away from the inlet and outlet of the mounting base 71 along the axis L2 of the housing 20.

[0096] When the filter element assembly is completely disassembled, the unlocking indicator is revealed through the through hole, indicating to the user that the filter element has been completely disassembled; at this time, the bypass valve 72 is opened, and the bypass is connected; the inlet valve 73 and the outlet valve 74 are closed; water enters the bypass through the inlet of the mounting base 71, and then flows out directly through the outlet of the mounting base 71.

[0097] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0098] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0099] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0100] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A filter housing structure, characterized in that, include: The inner shell (10) has a receiving cavity (11) for accommodating the filter element (30); An outer shell (20) is fitted over the inner shell (10), and the outer shell (20) is rotatably disposed relative to the inner shell (10); Water inlet connector (41) and water outlet connector (42) are provided in communication with the receiving cavity (11); A coupling (50) is provided on the inner shell (10) and / or the outer shell (20); When the outer shell (20) and the inner shell (10) rotate relative to each other, the connecting member (50) engages with the corresponding connecting mechanism on the water purification device.

2. The filter housing structure according to claim 1, characterized in that, The connecting member (50) is a transmission member. When the outer shell (20) and the inner shell (10) rotate relative to each other, the transmission member rotates synchronously with the rotating side of the outer shell (20) and the inner shell (10) and drives the corresponding connecting mechanism to rotate synchronously.

3. The filter housing structure according to claim 2, characterized in that, The transmission component is disposed on the outer shell (20); when the outer shell (20) rotates relative to the inner shell (10), the outer shell (20) drives the transmission component to rotate synchronously, so that the transmission component controls the corresponding engagement mechanism to open or close.

4. The filter housing structure according to claim 3, characterized in that, The transmission component is located at the middle of one end of the outer shell (20), and the outer shell (20) rotates relative to the inner shell (10) around the central axis (L1) of the transmission component.

5. The filter housing structure according to claim 1, characterized in that, The connecting member (50) is a limiting member. When the outer shell (20) and the inner shell (10) rotate relative to each other, the limiting member rotates with the rotating side of the outer shell (20) and the inner shell (10) until it engages with the corresponding connecting mechanism on the water purification device, so that the filter shell structure is limited to the water purification device.

6. The filter housing structure according to claim 5, characterized in that, The limiting member is disposed on the outer shell (20). When the outer shell (20) rotates relative to the inner shell (10), the limiting member rotates with the outer shell (20) to engage with the corresponding engagement mechanism on the water purification device, so that the filter shell structure is limited to the water purification device; and / or, The limiting member is provided on the inner shell (10). When the inner shell (10) rotates relative to the outer shell (20), the limiting member rotates with the inner shell (10) to engage with the corresponding engagement mechanism on the water purification device, so that the filter shell structure is limited to the water purification device.

7. The filter housing structure according to claim 1, characterized in that, The connecting member (50) is a limiting member. When the outer shell (20) and the inner shell (10) rotate relative to each other, the limiting member engages with the corresponding connecting mechanism on the water purification device and does not rotate, so as to prevent one of the outer shell (20) and the inner shell (10) from rotating synchronously with the other.

8. The filter housing structure according to claim 7, characterized in that, The limiting member is disposed on the outer shell (20). When the inner shell (10) rotates relative to the outer shell (20), the limiting member engages with the corresponding engagement mechanism on the water purification device to prevent the outer shell (20) from rotating with the inner shell (10); and / or, The limiting member is provided on the inner shell (10). When the outer shell (20) rotates relative to the inner shell (10), the limiting member engages with the corresponding engagement mechanism on the water purification device to prevent the inner shell (10) from rotating with the outer shell (20).

9. The filter housing structure according to any one of claims 1 to 8, characterized in that, The outer shell (20) is configured to form an installation cavity (19), and the inner shell (10) is disposed within the installation cavity (19).

10. The filter housing structure according to any one of claims 1 to 8, characterized in that, The water inlet connector (41) and the water outlet connector (42) are located at the same end of the inner shell (10), and both the water inlet connector (41) and the water outlet connector (42) extend through the outer shell (20).

11. The filter housing structure according to claim 10, characterized in that, Both the water inlet connector (41) and the water outlet connector (42) extend from the first end of the housing (20). The first end of the housing (20) is provided with a first clearance hole (21) and a second clearance hole (22). When the housing (20) rotates, the first clearance hole (21) avoids the water inlet connector (41), and the second clearance hole (22) avoids the water outlet connector (42).

12. The filter housing structure according to claim 11, characterized in that, Both the first clearance hole (21) and the second clearance hole (22) extend circumferentially along the outer casing (20); wherein, A first clearance groove (211) is provided on the wall of the first clearance hole (21), the first clearance groove (211) being located between the first end and the second end of the first clearance hole (21). A first stop (412) is provided on the outer wall of the water inlet connector (41). In the axial direction (L2) of the outer casing (20), the first clearance groove (211) allows the first stop (412) to pass through, and the portion of the first clearance hole (21) without the first clearance groove (211) engages with the first stop (412); and / or, A second clearance groove (221) is provided on the wall of the second clearance hole (22). The second clearance groove (221) is located between the first end and the second end of the second clearance hole (22). A second stop (422) is provided on the outer wall of the water outlet connector (42). In the direction of the axis (L2) of the outer shell (20), the second clearance groove (221) allows the second stop (422) to pass through, and the part of the wall of the second clearance hole (22) without the second clearance groove (221) is stopped and engaged with the second stop (422).

13. The filter housing structure according to claim 9, characterized in that, The connector (50) is provided with a first limiting part (51), and the outer shell (20) is provided with a second limiting part (23). The first limiting part (51) and the second limiting part (23) are connected by snap-fit, screw-fit or adhesive.

14. The filter housing structure according to claim 10, characterized in that, The water inlet connector (41) and the water outlet connector (42) are both located at the first end of the inner shell (10). The second end of the inner shell (10) is provided with a first guide part (12). The second end of the outer shell (20) is provided with a second guide part (24) that guides and cooperates with the first guide part (12). The first guide part (12) and the second guide part (24) are nested together.

15. The filter housing structure according to claim 1, characterized in that, The top of the connector (50) has a connecting part (52) that connects to the corresponding connecting mechanism. A spiral groove (53) is provided on the outer side wall of the connector (50). The spiral groove (53) can be guided and engaged with the fixing protrusion (75) of the water purification device.

16. The filter housing structure according to any one of claims 1 to 8, characterized in that, An installation status indicator structure (60) is provided between the second end of the inner shell (10) and the second end of the outer shell (20). The installation status indicator structure (60) is used to indicate that the connecting member (50) is in the transmission position of opening or closing the corresponding connecting mechanism, and / or, the installation status indicator structure (60) is used to indicate whether the filter shell structure is installed in place on the water purification device.

17. The filter housing structure according to claim 16, characterized in that, The installation status indication structure (60) includes an indicator mark (61) disposed on the inner shell (10) and a through hole (62) disposed on the outer shell (20). The indicator mark (61) is located on the rotation trajectory of the through hole (62). When the through hole (62) and the indicator mark (61) correspond, the indicator mark (61) is exposed through the through hole (62) to indicate that the coupling (50) is in the position of opening or closing the corresponding coupling mechanism.

18. The filter housing structure according to any one of claims 1 to 8, characterized in that, The outer end face of the first end of the inner shell (10) is provided with a mounting groove (18) for mounting the bottom end of the connector (50). The bottom end of the connector (50) has an annular flange (54). The annular flange (54) engages with the first end stop of the outer shell (20) in the direction of the axis (L2) of the outer shell (20) to restrict the connector (50) from moving relative to the inner shell (10) along the direction of the axis (L2) of the outer shell (20).

19. The filter housing structure according to claim 9, characterized in that, An operating part (25) is provided on the outer shell (20), and the operating part (25) drives the outer shell (20) to rotate.

20. The filter housing structure according to any one of claims 1 to 8, characterized in that, The connector (50) is disposed at the first end of the housing (20), and a reinforcing part (26) is provided on the first end of the housing (20), the reinforcing part (26) surrounding the outside of the connector (50).

21. The filter housing structure according to claim 20, characterized in that, The reinforcing part (26) includes a reinforcing plate embedded in the first end of the outer shell (20).

22. A filter element assembly, comprising a filter housing structure and a filter element (30) disposed within the filter housing structure, characterized in that, The filter housing structure is the filter housing structure according to any one of claims 1 to 21.

23. The filter element assembly according to claim 22, characterized in that, A water inlet cavity (31) is formed between the filter element (30) and the inner wall of the inner shell (10), and a clean water cavity (32) is formed in the hollow inner cavity of the filter element (30). The water inlet connector (41) is connected to the water inlet cavity (31), and the water outlet connector (42) is connected to the clean water cavity (32).

24. A water purification device, comprising a mounting base (71), an inlet valve (73), a bypass valve (72), and an outlet valve (74), wherein the inlet valve (73), the bypass valve (72), and the outlet valve (74) are all disposed on the mounting base (71), characterized in that, A filter element assembly is mounted on the mounting base (71), the filter element assembly being the filter element assembly as described in claim 22 or 23, and the corresponding engagement mechanism being the bypass valve (72).

25. A method for installing a filter cartridge assembly on a water purification device, characterized in that, The filter element assembly includes the filter housing structure as described in any one of claims 1 to 21; The water purification device includes a mounting base (71), an inlet valve (73), an outlet valve (74), and a corresponding connecting mechanism. The inlet valve (73), the outlet valve (74), and the corresponding connecting mechanism are all mounted on the mounting base (71). The installation method includes: The inlet connector (41) of the filter element assembly is connected to the inlet valve (73) of the water purification device, the outlet connector (42) of the filter element assembly is connected to the outlet valve (74) of the water purification device, and the connecting member (50) is connected to the corresponding connecting mechanism on the water purification device. Rotating the outer casing (20) causes the connecting member (50) to rotate synchronously, and at the same time, the connecting member (50) causes the corresponding connecting mechanism to rotate synchronously; simultaneously, the filter element assembly moves axially toward the mounting base (71), the water inlet connector (41) opens the water inlet valve (73), and the water outlet connector (42) opens the water outlet valve (74).

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