Filter element, filter element mounting structure and water purifier

Abstract

The utility model belongs to water purification equipment technical field provides a filter core, filter core mounting structure and water purifier, filter core includes: filter core cylinder body, filter core end cover is arranged in filter core body one end, is equipped with first joint arc buckle and second joint arc buckle on the outside wall of filter core end cover, first joint arc buckle and second joint arc buckle are equipped with first guide surface and second guide surface who links to each other and is mutually at one side away from filter core cylinder body Angle setting, first guide surface and second guide surface are used for guiding cooperation when dismounting filter core, the utility model discloses through first guide surface and second guide surface form enough length's guide structure, can carry out guiding cooperation when dismounting filter core, thereby avoid filter core to jam when dismounting, make the dismounting of filter core more laborsaving.

Description

Technical Field

[0001] This utility model relates to the field of water purification equipment technology, and in particular to a filter element, a filter element installation structure, and a water purifier. Background Technology

[0002] A water purifier, also known as a water filter or water purifier, is a water treatment device that performs deep filtration and purification of water according to the requirements for water use. With the development of the water purification industry and people's pursuit of quality of life, users have higher and higher requirements for the user experience of water purifier products, especially the operation of replacing filter cartridges.

[0003] In related technologies, most water purifier filter cartridges on the market currently use a snap-fit ​​quick-change method for installation. However, the designed guide rails have insufficient travel, which may cause the filter cartridges to get stuck or make disassembly and assembly difficult. Utility Model Content

[0004] This utility model provides a filter element, a filter element installation structure, and a water purifier to solve the technical problem that the guide rail travel of the existing water purifier filter element installation structure is insufficient, resulting in the filter element getting stuck or being difficult to disassemble and assemble.

[0005] This utility model provides a filter element, the filter element comprising: Filter cartridge body; A filter element end cap is disposed at one end of the filter element cylinder. A first snap-fit ​​arc buckle and a second snap-fit ​​arc buckle are provided on the outer side wall of the filter element end cap. The first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle are respectively provided with a first guide surface and a second guide surface that are connected and set at an included angle on the side away from the filter element cylinder. The first guide surface and the second guide surface are used for guiding and cooperating when the filter element is disassembled and assembled.

[0006] In one embodiment of the present invention, the first guide surface is set at an angle to the first horizontal plane, the first horizontal plane is perpendicular to the axis of the filter element cylinder, and the second guide surface may be partially parallel to the first horizontal plane.

[0007] In one embodiment of the present invention, the second guide surface extends between the first horizontal plane and the third horizontal plane, the first guide surface extends between the second horizontal plane and the third horizontal plane, the second horizontal plane is parallel to the first horizontal plane, and the third horizontal plane is located between the first horizontal plane and the second horizontal plane and is parallel to the first horizontal plane.

[0008] In one embodiment of the present invention, the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle do not contact each other. The first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle each have a first end and a second end. The first end is flush with the first horizontal plane, and the second end is flush with the second horizontal plane. The first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle both extend between the first horizontal plane and the second horizontal plane.

[0009] In one embodiment of the present invention, the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle are each provided with a first mounting surface on the side near the filter element cylinder. The first mounting surface is at least partially parallel to the first horizontal plane. A stop rib is provided on the first mounting surface. A guide start and stop surface is provided between the first mounting surface and the first end.

[0010] In one embodiment of the present invention, the projected arc length of the first snap-fit ​​arc buckle on the first horizontal plane is L1, and the projected arc length of the second snap-fit ​​arc buckle on the first horizontal plane is L2, wherein L1 > L2.

[0011] This utility model also provides a filter element mounting structure, including: A filter element mounting base is provided with a first guide rail and a second guide rail. A first positioning groove and a second positioning groove are formed between the first guide rail and the second guide rail. A guide boss is provided in both the first positioning groove and the second positioning groove. As described above, the first snap-fit ​​arc buckle cooperates with the first guide slide rail, the second snap-fit ​​arc buckle cooperates with the second guide slide rail, and the second guide surface cooperates with the guide boss.

[0012] In one embodiment of the present invention, the projection arc length of the first positioning groove on the first horizontal plane is L3, and the projection arc length of the second positioning groove on the first horizontal plane is L4, wherein L3 = L1 + A1, A1 is the first fitting clearance, L4 = L2 + A2, A2 is the second fitting clearance, and L1 > L4.

[0013] In one embodiment of this utility model, both the first guide rail and the second guide rail are provided with an inclined guide surface, a backstop groove, a second mounting surface, and a stop surface. The guide start and stop surfaces of the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle cooperate with the inclined guide surface of the first guide rail and the second guide rail to guide the guide rail until the guide start and stop surfaces of the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle contact the stop surface of the first guide rail and the second guide rail, so as to match the stop rib of the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle with the backstop groove of the first guide rail and the second guide rail. The first mounting surface of the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle contacts the second mounting surface of the first guide rail and the second guide rail.

[0014] This utility model also provides a water purifier, including the filter cartridge installation structure described above.

[0015] The beneficial effects of this utility model are as follows: The filter element proposed by this utility model has a first guide surface and a second guide surface that are connected and set at an included angle on the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle. The first guide surface and the second guide surface form a guide structure of sufficient length, which can guide and cooperate during the installation and removal of the filter element, thereby avoiding jamming of the filter element during installation and removal, and making the installation and removal of the filter element more labor-saving. Attached Figure Description

[0016] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0017] In the attached diagram: Figure 1 This is a schematic diagram of the filter element and filter element mounting structure provided in an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of a filter element end cap provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the first snap-fit ​​arc buckle on the filter element end cap according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of the second snap-fit ​​arc buckle on the filter element end cap according to an embodiment of the present invention; Figure 5 This is a first-view structural schematic diagram of a filter element mounting base provided in an embodiment of the present invention; Figure 6 This is a second-view structural schematic diagram of a filter element mounting base provided in an embodiment of the present invention; Figure 7 A first-view assembly diagram of the filter element and filter element mounting base provided in an embodiment of the present utility model; Figure 8 A second-view assembly diagram of the filter element and filter element mounting base provided in an embodiment of the present utility model; Figure 9 A third-view assembly diagram of the filter element and filter element mounting base provided in an embodiment of the present utility model; Figure 10 A fourth-view assembly diagram of the filter element and filter element mounting base provided in an embodiment of the present utility model; Figure 11 A cross-sectional view of the filter element and filter element mounting base after assembly, according to an embodiment of the present invention.

[0018] The attached figures are labeled as follows: 1-Filter cartridge body; 2-Filter cartridge end cap; 3-Filter cartridge mounting base; 4-Integrated water circuit board; 5-First snap-fit ​​arc buckle; 6-Second snap-fit ​​arc buckle; 7-First guide surface; 8-Second guide surface; 9-First mounting surface; 10-Stop rib; 11-Guide start and stop surface; 12-First positioning groove; 13-Second positioning groove; 14-First guide slide rail; 15-Second guide slide rail; 16-Guide boss; 17-Angled guide surface; 18-Anti-reverse groove; 19-Second mounting surface; 20-Stop surface. Detailed Implementation

[0019] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0020] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0021] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0022] Please see Figures 1 to 11 This utility model provides an exemplary filter element, comprising: Filter cartridge body 1; The filter element end cap 2 is disposed at one end of the filter element cylinder 1. The outer side wall of the filter element end cap 2 is provided with a first snap-fit ​​arc buckle 5 and a second snap-fit ​​arc buckle 6. The first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 are respectively provided with a first guide surface 7 and a second guide surface 8 connected to each other and arranged at an included angle on the side away from the filter element cylinder 1. The first guide surface 7 and the second guide surface 8 are used to provide guiding engagement when the filter element is disassembled and installed. The first guide surface 7 is used to guide engagement with the guide slide rail of the filter element mounting base 3 when the filter element is disassembled and installed. The second guide surface 8 is used to guide engagement with the guide boss 16 of the filter element mounting base 3 when the filter element is disassembled and installed.

[0023] In the filter element provided by this utility model, the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 are provided with a first guide surface 7 and a second guide surface 8 that are connected and set at an included angle. The first guide surface 7 and the second guide surface 8 form a guide structure of sufficient length, which can guide and cooperate when the filter element is disassembled and installed, thereby preventing the filter element from getting stuck during disassembly and installation, and making the disassembly and installation of the filter element easier.

[0024] In this embodiment, the first guide surface 7 is set at an angle to the first horizontal plane, the first horizontal plane is perpendicular to the axis of the filter element cylinder 1, and the second guide surface 8 can be partially parallel to the first horizontal plane. Specifically, the first guide surface 7 is an inclined surface. When installing the filter element, the first guide surface 7 provides guidance for installation, which facilitates the installation of the filter element.

[0025] In some embodiments, the second guide surface 8 extends between the first horizontal plane and the third horizontal plane, and the first guide surface 7 extends between the second horizontal plane and the third horizontal plane. The second horizontal plane is parallel to the first horizontal plane, and the third horizontal plane is located between the first horizontal plane and the second horizontal plane and is parallel to the first horizontal plane. Specifically, the second guide surface 8 is set at an angle to the first guide surface 7. The second guide surface 8 has an inclined surface, and the inclination of the inclined surface is less than the inclination of the first guide surface 7. The second guide surface 8 is connected to the first end through an inclined transition surface. Through the arrangement of the first guide surface 7 and the second guide surface 8, the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 form an irregular arc structure.

[0026] In this embodiment, the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 do not contact each other. The first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 each have a first end and a second end. The first end is flush with the first horizontal plane, and the second end is flush with the second horizontal plane. The first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 both extend between the first horizontal plane and the second horizontal plane.

[0027] Furthermore, both the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 have a first mounting surface 9 on the side near the filter element cylinder 1. The first mounting surface 9 is at least partially parallel to the first horizontal plane. A stop rib 10 is provided on the first mounting surface 9. A guide start and stop surface 11 is provided between the first mounting surface 9 and the first end. Specifically, the first mounting surface 9 has a horizontal part parallel to the first horizontal plane and an arc-shaped and inclined part that is not parallel to the first horizontal plane. The guide start and stop surface 11 is connected to both the first mounting surface 9 and the first end.

[0028] In the above embodiment, the projected arc length of the first snap-fit ​​arc buckle 5 on the first horizontal plane is L1, and the projected arc length of the second snap-fit ​​arc buckle 6 on the first horizontal plane is L2, wherein L1 > L2. Specifically, the projected arc lengths of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 on the first horizontal plane correspond to the lengths of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6. The asymmetrical design of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 means that the lengths of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 are different on both sides of the filter element end cap 2. The filter element cannot be installed after being rotated 180°, so that the filter element cannot be installed in reverse and the uniqueness of the sequential installation is maintained.

[0029] It is worth noting that the projected arc length of the second guide surface 8 of the first snap-fit ​​arc buckle 5 on the first horizontal plane is L5, and the projected arc length of the second guide surface 8 of the second snap-fit ​​arc buckle 6 on the first horizontal plane is L6, where L5 > L6. By limiting the length of the second guide surface 8 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6, the design of different lengths of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 is satisfied.

[0030] In another embodiment, the present invention also provides a filter element mounting structure, comprising: The filter element mounting base 3 is provided with a first guide slide rail 14 and a second guide slide rail 15. A first positioning groove 12 and a second positioning groove 13 are formed between the first guide slide rail 14 and the second guide slide rail 15. A guide boss 16 is provided in both the first positioning groove 12 and the second positioning groove 13. And the filter element as described above, the first snap-fit ​​arc buckle 5 cooperates with the first guide slide rail 14, the second snap-fit ​​arc buckle 6 cooperates with the second guide slide rail 15, and the second guide surface 8 cooperates with the guide boss 16 for guiding.

[0031] In some embodiments, the filter element mounting structure also includes an integrated water circuit board 4. The filter element mounting base 3 is detachably connected to or integrally connected to the integrated water circuit board 4. Specifically, when the filter element is installed in the filter element mounting base 3, the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 of the filter element are installed by the first positioning groove 12 and the second positioning groove 13 respectively. Since the lengths of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 are different, the first snap-fit ​​arc buckle 5 can only slide down from the first positioning groove 12 into the filter element mounting base 3, and the second snap-fit ​​arc buckle 6 can only slide down from the second positioning groove 13 into the filter element mounting base 3. Then, the first guide slide rail 14 and the second guide slide rail 15 respectively guide and match the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6, thereby realizing the installation of the filter element on the filter element mounting base 3 and avoiding water leakage caused by reverse installation of the filter element.

[0032] Furthermore, the projected arc length of the first positioning groove 12 on the first horizontal plane is L3, and the projected arc length of the second positioning groove 13 on the first horizontal plane is L4. Wherein, L3=L1+A1, A1 is the first fitting gap, and L4=L2+A2, A2 is the second fitting gap. Specifically, the first fitting gap is the installation gap reserved for the first snap-fit ​​arc buckle 5 when the first positioning groove 12 is installed, and the second fitting gap is the installation gap reserved for the second snap-fit ​​arc buckle 6 when the second positioning groove 13 is installed. L1>L4. When installing the filter element, the first snap-fit ​​arc buckle 5 and the second positioning groove 13 are different in size, so the first snap-fit ​​arc buckle 5 cannot fall into the second positioning groove 13, thereby avoiding the reverse installation operation of the filter element and ensuring the uniqueness of the installation direction.

[0033] In some embodiments, both the first guide rail 14 and the second guide rail 15 are provided with an inclined guide surface 17, a backstop groove 18, a second mounting surface 19, and a stop surface 20. The backstop groove 18 is disposed on the second mounting surface 19. The guide start and stop surfaces 11 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 cooperate with the inclined guide surfaces 17 of the first guide rail 14 and the second guide rail 15 to guide the guide rails until the guide start and stop surfaces 11 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 contact the stop surface 20 of the first guide rail 14 and the second guide rail 15, so as to connect the stop ribs 10 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 with the first guide rail 14 and the second guide rail 15. The anti-reverse groove 18 of the slide rail 15 is matched. The first mounting surface 9 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 is in contact with the second mounting surface 19 of the first guide slide rail 14 and the second guide slide rail 15. Specifically, after the filter element is installed on the filter element mounting base 3, the stop ribs 10 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 respectively cooperate with the anti-reverse grooves 18 of the first guide slide rail 14 and the second guide slide rail 15 to prevent the filter element from being pulled out due to water pressure during operation and causing water leakage. The first mounting surface 9 and the second mounting surface 19 are in close contact to bear the axial pressure of the filter element. The stop rib 10 is stuck on the anti-reverse groove 18 to bear the radial rotation pressure of the filter element and prevent the filter element from retracting.

[0034] It is worth noting that the method of using this utility model is as follows: When installing the filter element, first move the filter element end cap 2 towards the filter element mounting base 3 and downwards, while simultaneously rotating the filter element clockwise. The first snap-fit ​​arc buckle 5 on the filter element end cap 2 will align and fall into the first positioning groove 12 of the filter element mounting base 3, and the second snap-fit ​​arc buckle 6 will align and fall into the second positioning groove 13. At this time, the first guide surfaces 7 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 respectively contact the first guide slide rail 14 and the second guide slide rail 15 of the filter element mounting base 3, and the guide start and stop surfaces 11 contact the inclined guide surfaces. Continue pressing and rotating the filter element clockwise, the first guide surfaces 7 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 guide and cooperate with the first guide slide rail 14 and the second guide slide rail 15. Under the oblique push, the filter element can rotate smoothly until the first guide surface 7 disengages from the first guide slide rail 14 and the second guide slide rail 15. At this time, the second guide surface 8 and the guide boss The 16-point contact mechanism ensures smooth rotation of the filter element. When the filter element rotates to the point where the guide start and stop surfaces 11 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 contact the stop surfaces 20 of the first guide rail 14 and the second guide rail 15 respectively, the filter element is blocked and cannot rotate, indicating that the filter element is installed in place. When disassembling the filter element, simply rotate it counterclockwise. During the process of the filter element being rotated out, the guide boss 16 first contacts the second guide surface 8 and pushes the filter element outward. After being pushed out for a certain distance, the first guide rail 14 and the second guide rail 15 of the filter element mounting base 3 contact the first guide surface 7 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 respectively, and continue to push the filter element outward until the filter element is removed. Through the cooperation of the first guide surface 7 and the second guide surface 8 with the first guide rail 14, the second guide rail 15 and the guide boss 16, the filter element rotates more smoothly, avoiding jamming and making disassembly and assembly easier.

[0035] Understandably, during the disassembly and assembly process, the first guide surface 7 of the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 respectively contacts and engages with the first guide slide rail 14 and the second guide slide rail 15 to guide the rotation of the filter element. When the first guide surface 7 separates from the first guide slide rail 14 and the second guide slide rail 15, the second guide surface 8 contacts and engages with the guide boss 16 to continue guiding the rotation of the filter element, thereby preventing the filter element from jamming during rotation and making the disassembly and assembly of the filter element easier.

[0036] In another embodiment, the present invention also provides a water purifier, including the filter cartridge installation structure as described above.

[0037] In summary, in the filter cartridge installation structure and water purifier provided by this utility model, the first snap-fit ​​arc buckle 5 and the second snap-fit ​​arc buckle 6 are provided with a first guide surface 7 and a second guide surface 8 that are connected and set at an included angle. The first guide surface 7 and the second guide surface 8 form a guide structure of sufficient length, which can guide and cooperate during the installation and removal of the filter cartridge, thereby preventing the filter cartridge from getting stuck during installation and removal, and making the installation and removal of the filter cartridge easier.

[0038] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A filter element, characterized in that, include: Filter cartridge body; A filter element end cap is disposed at one end of the filter element cylinder. A first snap-fit ​​arc buckle and a second snap-fit ​​arc buckle are provided on the outer side wall of the filter element end cap. The first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle are respectively provided with a first guide surface and a second guide surface that are connected and set at an included angle on the side away from the filter element cylinder. The first guide surface and the second guide surface are used for guiding and cooperating when the filter element is disassembled and assembled.

2. The filter element according to claim 1, characterized in that, The first guide surface is set at an angle to the first horizontal plane, the first horizontal plane is perpendicular to the axis of the filter element cylinder, and the second guide surface is partially parallel to the first horizontal plane.

3. The filter element according to claim 2, characterized in that, The second guide surface extends between the first horizontal plane and the third horizontal plane, the first guide surface extends between the second horizontal plane and the third horizontal plane, the second horizontal plane is parallel to the first horizontal plane, and the third horizontal plane is located between the first horizontal plane and the second horizontal plane and is parallel to the first horizontal plane.

4. The filter element according to claim 3, characterized in that, The first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle do not contact each other. The first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle each have a first end and a second end. The first end is flush with the first horizontal plane, and the second end is flush with the second horizontal plane. The first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle both extend between the first horizontal plane and the second horizontal plane.

5. The filter element according to claim 4, characterized in that, Both the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle have a first mounting surface on the side near the filter element cylinder. The first mounting surface is at least partially parallel to the first horizontal plane. A stop rib is provided on the first mounting surface. A guide start and stop surface is provided between the first mounting surface and the first end.

6. The filter element according to claim 2, characterized in that, The first snap-fit ​​arc buckle has a projected arc length of L1 on the first horizontal plane, and the second snap-fit ​​arc buckle has a projected arc length of L2 on the first horizontal plane, wherein L1 > L2.

7. A filter element mounting structure, characterized in that, include: A filter element mounting base is provided with a first guide slide rail and a second guide slide rail. A first positioning groove and a second positioning groove are formed between the first guide slide rail and the second guide slide rail. A guide boss is provided in both the first positioning groove and the second positioning groove. And the filter element as described in any one of claims 1-6, wherein the first snap-fit ​​arc buckle cooperates with the first guide slide rail, the second snap-fit ​​arc buckle cooperates with the second guide slide rail, and the second guide surface cooperates with the guide boss.

8. The filter element mounting structure according to claim 7, characterized in that, The first positioning groove has a projected arc length of L3 on the first horizontal plane, and the second positioning groove has a projected arc length of L4 on the first horizontal plane. Wherein, L3 = L1 + A1, A1 is the first fitting clearance, L4 = L2 + A2, A2 is the second fitting clearance, and L1 > L4.

9. The filter element mounting structure according to claim 7, characterized in that, Both the first guide rail and the second guide rail are provided with an inclined guide surface, a backstop groove, a second mounting surface, and a stop surface. The guide start and stop surfaces of the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle cooperate with the inclined guide surfaces of the first guide rail and the second guide rail to guide the guide rail until the guide start and stop surfaces of the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle contact the stop surfaces of the first guide rail and the second guide rail, so that the stop ribs of the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle match the backstop grooves of the first guide rail and the second guide rail. The first mounting surface of the first snap-fit ​​arc buckle and the second snap-fit ​​arc buckle contacts the second mounting surface of the first guide rail and the second guide rail.

10. A water purifier, characterized in that, Includes the filter element mounting structure as described in any one of claims 7-9.

Images