Limit ring, detachable filter element assembly and water purifier

Abstract

The present invention relates to a limit ring, a detachable filter element assembly and a water purifier, including a limiting member. The limiting member is of an annular structure. The inner side surface of the limiting member is provided with a first limiting rib and a second limiting rib that are arranged at intervals in the circumferential direction of the limiting member. Both the first limiting rib and the second limiting rib extend along the axial direction of the limiting member. The part of the limiting member located between the first limiting rib and the second limiting rib is a snap buckle. The inner side surface of the snap buckle is provided with an anti-retreat protrusion, and the snap buckle can be elastically deformed by being extruded outwards. During assembly, the limit ring can be sleeved outside the filter bottle body. Based on the elastic deformation ability of the snap buckle, the anti-retreat protrusion can be located on the side of the guiding protrusion on the filter bottle body away from the first bottle mouth by pushing the limit ring along the axial direction of the filter bottle body. At the same time, the guiding protrusion is also located between the first limiting rib and the second limiting rib, restricting the circumferential rotation of the limit ring relative to the filter bottle body. A single alignment and assembly process completes the limitation in multiple directions, improving the convenience of assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification equipment, and particularly to a limiting ring, a detachable filter element assembly, and a water purifier. Background Art

[0002] With the continuous development of the field of water purifier equipment, in order to extend the service life of the whole water purifier, the filter element in a general water purifier is designed in a replaceable assembly form. In other words, after the water purifier is used for a period of time, the filtering capacity of the filter element will decrease as the usage time goes by, but the outer shell and other components of the whole water purifier are still within the valid period. At this time, the water purifying capacity of the water purifier can be restored by replacing the filter element, and the service life of the water purifier can be extended.

[0003] Based on the fact that the screwing direction of the filter cap relative to the filter bottle body is the same as the screwing direction of the filter bottle body relative to the whole housing of the water purifier. Therefore, during the process of replacing the filter element, in order to avoid water leakage, when the filter bottle body is not removed from the whole housing, it is necessary to ensure that the filter cap and the filter bottle body are in a reliable mating and locking state. However, in the case of ensuring the locking reliability between the filter cap and the filter bottle body, the assembly process is not convenient enough. Summary of the Invention

[0004] Aiming at the problem of inconvenient assembly, the present invention provides a limiting ring, a detachable filter element assembly, and a water purifier, which can effectively improve the convenience of assembly.

[0005] A limiting ring includes a limiting member, the limiting member is of an annular structure, a first limiting rib and a second limiting rib which are arranged at intervals in the circumferential direction of the limiting member are provided on the inner side surface of the limiting member, both the first limiting rib and the second limiting rib extend along the axial direction of the limiting member, the part of the limiting member between the first limiting rib and the second limiting rib is an elastic buckle, a retaining protrusion is provided on the inner side surface of the elastic buckle, and the elastic buckle can be extruded outward to undergo elastic deformation.

[0006] The above solution provides a limiting ring. During assembly, the limiting ring can be sleeved outside the filter bottle body. Based on the elastic deformation ability of the elastic buckle, the retaining protrusion can be made to be located on the side of the guiding protrusion on the filter bottle body away from the first bottle mouth by pushing the limiting ring along the axial direction of the filter bottle body, and at the same time, the guiding protrusion is also between the first limiting rib and the second limiting rib, restricting the circumferential rotation of the limiting ring relative to the filter bottle body. One-time alignment and assembly process completes the limitation in multiple directions, improving the convenience of assembly.

[0007] In one embodiment, there is a notch between the part of the limiting member where the first limiting rib is provided and the elastic buckle, and there is a notch between the part of the limiting member where the second limiting rib is provided and the elastic buckle.

[0008] In one embodiment, the notch penetrates through the first end face of the limiting member, and the anti-retreat protrusion is located at a position on the snap closer to the first end face.

[0009] In one embodiment, the second end face of the limiting member is provided with convex teeth or tooth grooves.

[0010] In one embodiment, the convex teeth or tooth grooves are located between the first limiting rib and the second limiting rib.

[0011] In one embodiment, the first limiting rib, the second limiting rib and the snap closer form a limiting group, and there are multiple such limiting groups which are arranged at intervals in the circumferential direction of the limiting member.

[0012] A detachable filter element assembly includes a filter bottle body and the above-mentioned limiting ring. The filter bottle body is provided with a first bottle mouth for opening and closing cooperation with a filter bottle cap. The limiting ring is sleeved outside the filter bottle body and can slide along the axial direction of the filter bottle body. A guiding protrusion is provided on the filter bottle body, and the guiding protrusion is located between the first limiting rib and the second limiting rib. The guiding protrusion is limited to one side of the anti-retreat protrusion close to the first bottle mouth of the filter bottle body.

[0013] The above solution provides a detachable filter element assembly. By adopting the limiting ring described in any of the above embodiments, during the assembly process, when the limiting ring is pushed axially along the filter bottle body so that the anti-retreat protrusion is located on one side of the guiding protrusion on the filter bottle body away from the first bottle mouth, at the same time, the guiding protrusion is also located between the first limiting rib and the second limiting rib, restricting the rotation of the limiting ring relative to the filter bottle body in the circumferential direction. A single alignment and assembly process completes the limitation in multiple directions, improving the convenience of assembly.

[0014] In one embodiment, an anti-falling protrusion is provided outside the filter bottle body, and the anti-falling protrusion is limited to one side of the anti-retreat protrusion away from the first bottle mouth. The anti-retreat protrusion can move between the anti-falling protrusion and the guiding protrusion in the axial direction of the filter bottle body.

[0015] In one embodiment, the anti-falling protrusion surrounds the filter bottle body at least once in the circumferential direction.

[0016] In one embodiment, it further includes a filter bottle cap which is screwed onto the first bottle mouth of the filter bottle body to form a filter bottle for placing a filter element. The filter bottle cap and the limiting ring are in concave-convex cooperation to prevent the filter bottle cap from being unscrewed and loosened from the first bottle mouth of the filter bottle body to open the first bottle mouth.

[0017] A water purifier includes the above-mentioned detachable filter element assembly.

[0018] The above solution provides a water purifier. By adopting the detachable filter element assembly described in any of the above embodiments, multi-directional restrictions are completed in a single alignment and assembly process, improving the convenience of assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings forming a part of this application are used to provide a further understanding of the present invention. The schematic embodiments and descriptions thereof of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0021] Figure 1 It is an exploded view of the detachable filter element assembly described in this embodiment;

[0022] Figure 2 It is a schematic diagram of the disassembly principle of the detachable filter element assembly described in this embodiment;

[0023] Figure 3 It is a schematic structural diagram of the limit ring described in this embodiment;

[0024] Figure 4 It is a cross-sectional view of the detachable filter element assembly described in this embodiment;

[0025] Figure 5 For Figure 4 a partial enlarged view of A in

[0026] Figure 6 For Figure 4 a cross-sectional view of the detachable filter element assembly shown from another perspective;

[0027] Figure 7 It is a cross-sectional view of the detachable filter element assembly after being assembled with the whole machine housing in this embodiment;

[0028] Figure 8 For Figure 7 a partial enlarged view of B in

[0029] Figure 9 It is a schematic structural diagram of the filter cap described in this embodiment;

[0030] Figure 10 For Figure 9 a cross-sectional view of the filter cap shown;

[0031] Figure 11 It is a schematic structural diagram of the filter element described in this embodiment;

[0032] Figure 12 A cross-sectional view when the filter bottle cap, end cap, and limit ring are assembled together;

[0033] Figure 13 is Figure 12 a cross-sectional view of the end cap in

[0034] Description of the reference numerals:

[0035] 10. Removable filter element assembly; 11. Filter bottle body; 111. First bottle mouth; 112. Second bottle mouth; 113. Guide projection; 114. Anti-falling projection; 12. Filter bottle cap; 121. Mounting body; 122. Support member; 13. Limit ring; 131. Limiting member; 132. Elastic buckle; 133. Guide groove; 134. First limiting rib; 135. Second limiting rib; 136. Anti-retreat projection; 14. Convex teeth; 15. Tooth groove group; 16. Tooth groove; 17. End cap; 171. First sealing ring; 172. Second sealing ring; 173. Third end face; 174. Fourth end face; 175. Mounting hole; 176. Limiting projection; 177. Abutting projection; 18. Connecting member; 181. Limiting end; 19. Filter element; 191. Inner cylinder; 192. Flushing and drainage hole; 193. Handle; 20. Filter element mounting seat; 30. Whole machine housing; 31. Locking projection. Detailed implementation manners

[0036] To make the above objects, features, and advantages of the present invention more obvious and understandable, the following detailed description of the specific implementation manners of the present invention will be given with reference to the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] As Figure 1 , Figure 2 and Figure 3 shown, in one embodiment, a removable filter element assembly 10 is provided, including a filter bottle body 11. A filter bottle cap 12 can be screwed onto the first bottle mouth 111 of the filter bottle body 11 to seal the first bottle mouth 111. The second bottle mouth 112 of the filter bottle body 11 can be snapped onto the filter element mounting seat 20 of the water purifier, so that the filter element 19 in the filter bottle body 11 is in corresponding communication with each water port on the filter element mounting seat 20.

[0038] Furthermore, as Figure 1 and Figure 2 shown, in one embodiment, the removable filter element assembly 10 further includes a filter bottle cap 12, and the filter bottle cap 12 is screwed onto the first bottle mouth 111 of the filter bottle body 11 to form a filter bottle for placing the filter element 19.

[0039] When the filter element 19 in the filter bottle needs to be replaced after a period of use, the filter bottle body 11 can be first removed from the filter element mounting seat 20, so that the water flow path in the water purifier is separated from the filter bottle body 11. Then, the filter bottle cap 12 is removed from the filter bottle body 11, the first bottle mouth 111 is opened, and the filter element 19 is taken out of the filter bottle for replacement. Since the filter bottle body 11 has been separated from the filter element mounting seat 20 when the filter bottle cap 12 is loosened, there will be no water leakage when the first bottle mouth 111 is opened at this time.

[0040] Further, as Figure 2 shown, when the rotation direction when the filter bottle cap 12 is screwed onto the filter bottle body 11 is the same as the rotation direction when the filter bottle body 11 is screwed onto the filter element mounting seat 20, during the process of unscrewing the filter element 19 for replacement, the rotational force acting on the filter bottle may loosen the filter bottle cap 12 from the filter bottle body 11 before the filter bottle body 11 is removed from the filter element mounting seat 20, resulting in water leakage.

[0041] Based on this, in one embodiment, as Figure 3 shown, a limiting member 131 is provided. Using the limiting member 131 as an intermediate element between the filter bottle body 11 and the filter bottle cap 12, the situation where the filter bottle cap 12 is loosened from the filter bottle body 11 before the filter bottle body 11 is removed from the filter element mounting seat 20 is avoided during the disassembly process.

[0042] Specifically, as Figure 4 shown, the limiting member 131 can move back and forth relative to the filter bottle in a direction away from or close to the first bottle mouth 111. When the limiting member 131 moves forward to the locking position, as Figure 4 and Figure 6 shown, both the filter bottle body 11 and the filter bottle cap 12 are in limiting cooperation with the limiting member 131, restricting the filter bottle cap 12 from loosening and opening the first bottle mouth 111 at the first bottle mouth 111. When the limiting member 131 moves out of the locking position, at least one of the filter bottle body 11 and the filter bottle cap 12 can move relative to the limiting member 131, so that the filter bottle cap 12 can be unscrewed from the filter bottle body 11.

[0043] When the filter bottle body 11 is assembled to the filter element mounting seat 20, the limiting member 131 is in the locking position, and the filter bottle cap 12 is restricted and cannot be loosened and opened at the first bottle mouth 111. At this time, the rotational force acting on the filter bottle can only be transmitted to the mating part between the filter bottle body 11 and the filter element mounting seat 20, so that the filter bottle body 11 and the filter element mounting seat 20 are rotated and disassembled.

[0044] Generally, after the detachable filter element assembly 10 is assembled on the water purifier, the end where the filter bottle cap 12 is located is exposed. For convenience during the disassembly process, force is generally directly applied to the filter bottle cap 12 to provide a rotational force for the filter bottle. Therefore, it is more necessary to provide the limiting member 131 to avoid water leakage.

[0045] When the filter bottle body 11 is removed from the filter element mounting seat 20, the limiting member 131 moves out of the locking position, and the filter bottle cap 12 can rotate relative to the filter bottle body 11 and be removed from the first bottle mouth 111.

[0046] In other words, only when the filter bottle body 11 is first removed from the filter element mounting seat 20 can the filter bottle cap 12 be screwed relative to the filter bottle body 11, effectively avoiding water leakage. And based on the fact that the limiting member 131 switches states by moving on the filter bottle, and the moving direction is away from or towards the first bottle mouth 111, during the operation process, when the detachable filter element assembly 10 is removed from the water purifier, the limit in the moving direction of the limiting member 131 can be released, and then the filter bottle cap 12 can be unscrewed and removed from the filter bottle body 11. The entire disassembly process is smooth and fast, making it more convenient to replace the filter element 19.

[0047] Specifically, in one embodiment, as Figure 7 and Figure 8 shown, a locking protrusion 31 can be provided on the whole machine housing 30 of the water purifier. The whole machine housing 30 is connected to the filter element mounting seat 20. When the detachable filter element assembly 10 is assembled with the filter element mounting seat 20, the locking protrusion 31 abuts and limits the limiting member 131 in the locking position, restricting the filter bottle cap 12 from loosening and opening the first bottle mouth 111 from the first bottle mouth 111.

[0048] Alternatively, in another embodiment, a snap - locking member can be provided on the whole machine housing 30 of the water purifier. After the detachable filter element assembly 10 is assembled with the filter element mounting seat 20, the limiting member 131 can be manually pushed to the locking position. When the limiting member 131 reaches the locking position, the snap - locking member on the whole machine housing 30 is snap - fitted with the limiting member 131 to prevent the limiting member 131 from moving out of the locking position.

[0049] Specifically, the limiting member 131 can be slidably engaged with the filter bottle body 11, or the limiting member 131 is slidably engaged with the filter bottle cap 12, enabling the limiting member 131 to move to the locking position and also be able to move out of the locking position under certain circumstances.

[0050] For example, in one embodiment, as Figure 4As shown, the limiting member 131 is in sliding fit with the filter bottle body 11, and the limiting member 131 can move back and forth relative to the filter bottle body 11 in a direction away from the first bottle mouth 111.

[0051] As Figure 4 shown, the filter bottle body 11 is of a cylindrical structure, and the limiting member 131 can move along the axial direction of the filter bottle body 11.

[0052] When the limiting member 131 moves to the locking position, the limiting fit relationship between the limiting member 131 and the filter bottle cap 12 can be achieved by concave-convex fit. Specifically, convex teeth 14 can be provided on one of the limiting member 131 and the filter bottle cap 12, and a tooth groove 16 can be provided on the other. When the limiting member 131 moves forward to the locking position, the convex teeth 14 are inserted into the tooth groove 16 to restrict the filter bottle cap 12 from rotating relative to the limiting member 131 until the filter bottle cap 12 is loosened to open the first bottle mouth 111. When the limiting member 131 moves out of the locking position, the convex teeth 14 exit the tooth groove 16, and the filter bottle cap 12 can rotate relative to the limiting member 131, and then the filter bottle cap 12 can be unscrewed from the filter bottle body 11.

[0053] Further, the freedom of the limiting member 131 to rotate relative to the filter bottle body 11 in the circumferential direction of the filter bottle body 11 is restricted, so that when the filter bottle cap 12 cannot rotate relative to the limiting member 131, the filter bottle cap 12 cannot rotate relative to the filter bottle body 11. The so-called inability to rotate here means that the filter bottle cap 12 cannot rotate to loosen and open the first bottle mouth 111, but if the filter bottle cap 12 rotates a small angle and does not loosen from the first bottle mouth 111, this small-angle rotation is allowed.

[0054] Further, in one embodiment, a filter bottle body unit is provided, and the filter bottle body unit includes a limiting member 131 and a filter bottle body 11. As Figure 3 and Figure 4 shown, one of the limiting member 131 and the filter bottle body 11 is provided with a guiding protrusion 113, and the other is provided with a guiding groove 133. The guiding protrusion 113 is located in the guiding groove 133, and there is a clearance fit between the side wall of the guiding groove 133 and the guiding protrusion 113 in the screwing direction of the filter bottle cap 12.

[0055] A filter bottle body unit provided by the above solution. The limiting member 131 and the filter bottle body 11 are matched through the cooperation between the guiding protrusion 113 and the guiding groove 133, so that the rotation of the limiting member 131 relative to the filter bottle body 11 in the screwing direction of the filter bottle cap 12 is restricted. Thus, when the filter bottle cap 12 and the limiting member 131 are matched through the convex teeth 14 and the tooth grooves 16, the filter bottle cap 12 cannot be unscrewed and loosened from the first bottle mouth 111 of the filter bottle body 11 to open the first bottle mouth 111, achieving the effect of preventing water leakage. When the filter bottle cap 12 is screwed onto the filter bottle body 11, in order to facilitate the cooperation between the convex teeth 14 and the tooth grooves 16, a clearance fit is provided between the side wall of the guiding groove 133 and the guiding protrusion 113, so that the limiting member 131 can rotate a certain small angle in the screwing direction of the filter bottle cap 12, so that the convex teeth 14 and the tooth grooves 16 can be fitted together, improving the convenience of assembly and at the same time reducing the requirements for manufacturing precision.

[0056] Further, in one embodiment, as Figure 1 、 Figure 2 and Figure 4 shown, the guiding protrusion 113 is provided outside the filter bottle body 11. The guiding protrusion 113 can be used as the basis for the sliding fit of the limiting member 131 relative to the filter bottle body 11, and can also be used as the limiting basis to prevent the limiting member 131 from falling off the filter bottle body 11.

[0057] For example, in one embodiment, as Figure 4 、 Figure 6 and Figure 7 shown, the limiting member 131 covers the guiding protrusion 113. As Figure 3 shown, the surface of the limiting member 131 facing the guiding protrusion 113 is provided with a first limiting rib 134 and a second limiting rib 135 both arranged along the axial direction of the filter bottle body 11. The first limiting rib 134 and the second limiting rib 135 are arranged at intervals relative to each other to form the guiding groove 133. The guiding protrusion 113 can slide along the axial direction of the filter bottle body 11 in the guiding groove 133. Under the guiding action of the guiding groove 133, the limiting member 131 can slide along the axial direction of the filter bottle body 11 to the locking position on the filter bottle body 11, or can also slide out of the locking position, and switch between the two states.

[0058] The first limiting rib 134 and the second limiting rib 135 constitute two side walls of the guiding groove 133. In one embodiment, when the limiting member 131 moves to the locking position and the convex tooth 14 is located in the tooth groove 16, there is a clearance fit between the guiding protrusion 113 and the first limiting rib 134 and / or the second limiting rib 135. During the assembly process, the limiting member 131 can rotate a certain small angle relative to the filter bottle body 11 in the screwing direction of the filter bottle cap 12, so that the convex tooth 14 and the tooth groove 16 can be engaged together, improving the convenience of assembly and reducing the requirement for manufacturing precision at the same time.

[0059] Further, in one embodiment, as Figure 3 shown, a retaining protrusion 136 is provided on the side of the limiting member 131 facing the filter bottle body 11. As Figure 4 shown, the guiding protrusion 113 is limited to the side of the retaining protrusion 136 close to the first bottle mouth 111. Thus, the limiting member 131 is prevented from slipping off from the end where the first bottle mouth 111 is located.

[0060] Further, in one embodiment, in order to prevent the limiting member 131 from slipping off from the other end of the filter bottle body 11, as Figure 1 , Figure 2 and Figure 4 shown, an anti-falling protrusion 114 is provided on the side of the filter bottle body 11 facing the limiting member 131, and the anti-falling protrusion 114 is limited to the side of the retaining protrusion 136 far from the first bottle mouth 111.

[0061] Further, in one embodiment, as Figure 4 shown, the retaining protrusion 136 can move between the anti-falling protrusion 114 and the guiding protrusion 113 in the axial direction of the filter bottle body 11. In other words, although the anti-falling protrusion 114 and the guiding protrusion 113 are respectively limited to both sides of the retaining protrusion 136, the distance between the anti-falling protrusion 114 and the guiding protrusion 113 is greater than the thickness of the retaining protrusion 136, so that the retaining protrusion 136 can move between them.

[0062] More specifically, in one embodiment, as Figure 1 and Figure 2 shown, the anti-falling protrusion 114 surrounds the filter bottle body 11 circumferentially for at least one week. The reliability of anti-falling is improved, and no matter how the retaining protrusion 136 is distributed circumferentially on the filter bottle body 11, the anti-falling protrusion 114 can limit it.

[0063] Further, in one embodiment, as Figure 4As shown, when the convex tooth 14 is inserted into the tooth groove 16, the anti-retreat protrusion 136 is spaced from both the guiding protrusion 113 and the anti-falling protrusion 114. Ensure that the settings of the guiding protrusion 113 and the anti-falling protrusion 114 do not restrict the insertion of the convex tooth 14 into the tooth groove 16.

[0064] Further, in one embodiment, as Figure 4 shown, when the convex tooth 14 is inserted into the tooth groove 16, the distance between the anti-retreat protrusion 136 and the anti-falling protrusion 114 is greater than the height of the convex tooth 14. To ensure that the limiting member 131 can move away from the first bottle mouth 111 until the convex tooth 14 exits the tooth groove 16.

[0065] Specifically, in one embodiment, when the convex tooth 14 is inserted into the tooth groove 16, the difference between the distance between the anti-retreat protrusion 136 and the anti-falling protrusion 114 and the height of the convex tooth 14 is not less than 1 mm.

[0066] Further, in one embodiment, the convex tooth 14 can be provided on the limiting member 131, and the tooth groove 16 is located on the filter bottle cap 12; or the convex tooth 14 is located on the filter bottle cap 12, and the tooth groove 16 is located on the limiting member 131.

[0067] Specifically, as Figure 3 shown, in one embodiment, the convex tooth 14 can be located at a position on the limiting member 131 close to the filter bottle cap 12. The tooth groove 16 is formed at a position on the filter bottle cap 12 facing the convex tooth 14. Or, in another embodiment, the convex tooth 14 is located at a position on the filter bottle cap 12 close to the limiting member 131, and the tooth groove 16 is formed at a position on the limiting member 131 facing the convex tooth 14.

[0068] Further, in one embodiment, a filter element locking unit is provided, including the filter bottle body 11, the filter bottle cap 12 and the limiting member 131. As Figure 9 and Figure 10 shown, there are at least two tooth grooves 16, and a plurality of tooth grooves 16 are arranged in sequence in the circumferential direction of the filter bottle to form a tooth groove group 15, and the convex tooth 14 is correspondingly matched with the tooth groove group 15.

[0069] Thus, during the assembly process, as long as the convex tooth 14 is inserted into one of the tooth grooves 16, it can limit the filter bottle cap 12 from loosening and opening at the first bottle mouth 111, avoid water leakage, allow a certain assembly error, reduce the requirement for manufacturing precision, and improve the convenience of assembly at the same time.

[0070] In particular, when there are multiple convex teeth 14 and multiple tooth groove groups 15, and the convex teeth 14 correspond to the tooth groove groups 15 one by one, setting the tooth groove group 15 to include multiple tooth grooves 16 connected in sequence in the circumferential direction of the filter bottle can ensure that each convex tooth 14 can be inserted into the tooth groove 16 of the corresponding tooth groove group 15.

[0071] Further, in one embodiment, as Figure 3 shown, the convex tooth 14 is located on the end face of the limiting member 131 close to the first bottle mouth 111. As Figure 9 and Figure 10 shown, the tooth groove 16 is located on the end face of the filter bottle cap 12 facing the convex tooth 14. In other words, the tooth groove group 15 can be formed on the end face of the filter bottle cap 12 facing the limiting member 131. After the filter bottle cap 12 is screwed and assembled onto the filter bottle body 11, when the limiting member 131 moves to the locking position, the end face of the limiting member 131 provided with the convex tooth 14 faces the end face of the filter bottle cap 12, and the convex tooth 14 is located in the tooth groove 16.

[0072] Optionally, the convex tooth 14 and the tooth groove 16 can also be arranged at other positions, as long as the convex tooth 14 can be inserted into the tooth groove 16 when the filter bottle cap 12 is screwed and assembled onto the filter bottle body 11 and the limiting member 131 moves to the locking position.

[0073] Further, in one embodiment, as Figures 1 to 4 shown, the limiting member 131 is of an annular structure. The limiting member 131 is sleeved outside the filter bottle body 11, and the limiting member 131 can slide axially along the filter bottle body 11. Thus, the limiting member 131 can be reliably assembled on the filter bottle body 11.

[0074] Further, as Figure 3 shown, there are multiple convex teeth 14, and the multiple convex teeth 14 are arranged at intervals in the circumferential direction of the limiting member 131. As Figure 9 shown, there are multiple tooth grooves 16, each convex tooth 14 corresponds to multiple tooth grooves 16, and the multiple tooth grooves 16 corresponding to the same convex tooth 14 are connected in sequence to form the tooth groove group 15. There are multiple tooth groove groups 15, and the multiple tooth groove groups 15 are arranged at intervals in the circumferential direction of the filter bottle cap 12.

[0075] When the limiting member 131 and the filter bottle cap 12 are in limiting cooperation, the convex teeth 14 and the tooth groove groups 15 can correspond to each other one by one, increasing the resistance to the rotation of the filter bottle cap 12 relative to the limiting member 131.

[0076] Moreover, since each tooth groove group 15 corresponding to each convex tooth 14 includes at least two tooth grooves 16, during the assembly process, as long as each convex tooth 14 is inserted into one of the tooth grooves 16 in this tooth groove group 15. A certain assembly error is allowed to ensure that all convex teeth 14 can be inserted into each tooth groove group 15 simultaneously, reducing the requirement for manufacturing precision and improving the convenience of assembly.

[0077] Further, in one embodiment, as Figure 3 shown, the convex tooth 14 is an isosceles triangle convex structure, and the apex angle of the convex tooth 14 is 55° - 65°.

[0078] The apex angle of the convex tooth 14 can play a guiding role in the insertion process of the convex tooth 14. And the apex angle is located at 55° - 65°, which not only ensures a good guiding effect during assembly but also makes the disassembly feel better. Specifically, when the apex angle is less than 55°, the tooth pitch is too small, making it inconvenient to align, and the guiding effect of the convex tooth 14 inserted into the tooth groove 16 is poor; when the apex angle is greater than 65°, when the detachable filter element assembly 10 is disassembled and assembled from the whole machine housing 30 of the water purifier, the rotational force will be decomposed into a force in the disassembly and assembly direction of the detachable filter element assembly 10 outward through the mating inclined surface of the convex tooth 14 and the tooth groove 16, increasing the frictional force between the filter bottle body 11 and the filter element mounting seat 20 and increasing the disassembly torque, affecting the disassembly feel.

[0079] Further, in one embodiment, when the convex tooth 14 is located in the tooth groove 16, the acting force F1 that causes the convex tooth 14 to elastically deform and disengage from the tooth groove 16 when the filter bottle is screwed, and the acting force F2 for unscrewing the filter bottle body 11 from the filter element mounting seat 20, F1 is greater than F2. Ensure that during the disassembly process, the force acting on the filter bottle first removes the filter bottle body 11 from the filter element mounting seat 20, rather than screwing the convex tooth 14 out of the tooth groove 16.

[0080] Based on this, in order to ensure that the resistance provided between the convex tooth 14 and the tooth groove 16 is sufficient, in one embodiment, the height of the convex tooth 14 is set to 3 mm - 5 mm.

[0081] Further, when the limiting member 131 moves to the locking position and the convex tooth 14 is located in the tooth groove 16, the guiding protrusion 113 and the first limiting rib 134 and / or the second limiting rib 135 are in clearance fit, facilitating the smooth insertion of the convex tooth 14 into the corresponding tooth groove group 15 during the assembly process. However, the clearance between the guiding protrusion 113 and the first limiting rib 134 and / or the second limiting rib 135 cannot be too large, otherwise the first limiting rib 134 and the second limiting rib 135 will lose their limiting and guiding functions, and the convex tooth 14 will disengage from the corresponding tooth groove group 15.

[0082] Therefore, in one embodiment, the clearance width between the guiding protrusion 113 and the first limiting rib 134 is less than the circumferential distance required for the convex tooth 14 to move out of the corresponding tooth groove group 15. That is, although the limiting member 131 can rotate slightly in the circumferential direction of the filter bottle body 11, its rotation angle is limited to ensure that the convex tooth 14 is always aligned with the corresponding tooth groove group 15 without deviation, ensuring that the limiting function of the limiting member 131 on the filter bottle cap 12 is not lost.

[0083] Further, in one embodiment, a tooth groove group 15 includes 2n + 1 tooth grooves 16, where n is an integer. That is, the number of tooth grooves 16 included in a tooth groove group 15 is odd. The pitch of the tooth groove group 15 is h. When the convex tooth 14 is located in the middle tooth groove 16 of this tooth groove group 15, the guiding protrusion 113 has a clearance fit with both the first limiting rib 134 and the second limiting rib 135, and the clearance width between the guiding protrusion 113 and the first limiting rib 134 and the second limiting rib 135 is d, where 0.5h < d ≤ (n + 0.5)h.

[0084] Under the limiting action of the first limiting rib 134 and the second limiting rib 135, even if the guiding protrusion 113 sways between them, the clearance width is such that the convex tooth 14 always faces the tooth groove group 15 without deviation.

[0085] For example, specifically, in one embodiment, as Figure 9 and Figure 10 shown, the tooth groove group 15 includes 3 tooth grooves 16. When the convex tooth 14 is located in the middle tooth groove 16 of this tooth groove group 15, the guiding protrusion 113 has a clearance fit with both the first limiting rib 134 and the second limiting rib 135, and the clearance width between the guiding protrusion 113 and the first limiting rib 134 and the second limiting rib 135 is d, where 0.5h < d ≤ 1.5h.

[0086] Further, in one embodiment, as Figure 3 shown, the limiting member 131 is of an annular structure. There are multiple guiding protrusions 113, and the multiple guiding protrusions 113 are arranged at intervals in the circumferential direction of the filter bottle body 11. There are multiple guiding grooves 133, and the multiple guiding grooves 133 are arranged at intervals in the circumferential direction of the limiting member 131, and the guiding protrusions 113 correspond to the guiding grooves 133 one by one. In other words, assuming that the first limiting rib 134, the second limiting rib 135, and the snap button 132 form a limiting group, then there are multiple limiting groups, and the multiple limiting groups are arranged at intervals in the circumferential direction of the limiting member 131.

[0087] Further, in one embodiment, asFigure 3 As shown, the convex tooth 14 is located between the first limiting rib 134 and the second limiting rib 135.

[0088] Here, the convex tooth 14 being located between the first limiting rib 134 and the second limiting rib 135 means that the convex tooth 14 is located between the extension line of the first limiting rib 134 and the extension line of the second limiting rib 135. In other words, it is not limited to the convex tooth 14 being located between the first limiting rib 134 and the second limiting rib 135. For the case where the convex tooth 14 is located on the end face of the limiting member 131, the convex tooth 14 is located between the extension line of the first limiting rib 134 and the extension line of the second limiting rib 135.

[0089] In addition, when the convex tooth 14 is provided on the filter bottle cap 12, when the convex tooth 14 is inserted into the tooth groove 16, the convex tooth 14 is also located between the first limiting rib 134 and the second limiting rib 135.

[0090] Furthermore, in one embodiment, as Figure 3 shown, the part of the limiting member 131 located between the first limiting rib 134 and the second limiting rib 135 is a snap 132. The anti-back-off protrusion 136 is located on the inner side surface of the snap 132, and the snap 132 can be elastically deformed by being extruded outward.

[0091] During the assembly process, the limiting member 131 moves axially along the filter bottle body 11, so that the anti-back-off protrusion 136 moves from one side of the guiding protrusion 113 close to the first bottle mouth 111 to the other side. During this process, the snap 132 is elastically deformed so that the anti-back-off protrusion 136 can cross the guiding protrusion 113. When the anti-back-off protrusion 136 reaches the side of the guiding protrusion 113 away from the first bottle mouth 111, the snap 132 resets, so that the anti-back-off protrusion 136 is limited by the guiding protrusion 113 on the side away from the first bottle mouth 111, and the limiting member 131 is prevented from falling off from this end of the first bottle mouth 111.

[0092] Especially when the limiting member 131 is of an annular structure, as long as the limiting member 131 can be prevented from slipping off both ends of the filter bottle body 11, the limiting member 131 will not fall off from the filter bottle body 11, effectively avoiding the situation of the limiting member 131 being lost.

[0093] In one embodiment, as Figure 3As shown, a limit ring 13 is provided, including a limiting member 131. The limiting member 131 is of an annular structure. On the inner side of the limiting member 131, a first limiting rib 134 and a second limiting rib 135 are arranged along the axial direction of the limiting member 131. The part of the limiting member 131 between the first limiting rib 134 and the second limiting rib 135 is a snap 132. On the inner side of the snap 132, an anti-retreat protrusion 136 is provided. The snap 132 can be elastically deformed by being extruded outward.

[0094] During assembly, the limit ring 13 can be sleeved outside the filter bottle body 11. Based on the elastic deformation ability of the snap 132, the anti-retreat protrusion 136 can be located on the side of the guiding protrusion 113 away from the first bottle mouth 111 by axially pushing the limit ring 13 along the filter bottle body 11. At the same time, the guiding protrusion 113 is also between the first limiting rib 134 and the second limiting rib 135, restricting the circumferential rotation of the limit ring 13 relative to the filter bottle body 11. One alignment and assembly process completes the restriction in multiple directions, improving the convenience of assembly.

[0095] Further, in one embodiment, as Figure 3 shown, there is a notch between the part of the limiting member 131 where the first limiting rib 134 is provided and the snap 132, and there is a notch between the part of the limiting member 131 where the second limiting rib 135 is provided and the snap 132. Only one side of the snap 132 is connected to the limiting member 131, making the snap 132 have a certain elastic deformation ability.

[0096] Specifically, in one embodiment, as Figure 3 shown, the notch penetrates the first end face of the limiting member 131. The anti-retreat protrusion 136 is located at the part of the snap 132 close to the first end face. The end of the snap 132 for connecting to the limiting member 131 is the fixed end, and the end of the snap 132 far from the fixed end is the free end. The anti-retreat protrusion 136 is located at the free end of the snap 132. During the assembly process, the snap 132 undergoes elastic deformation, so that the anti-retreat protrusion 136 crosses the guiding protrusion 113 and is limited by the guiding protrusion 113 on the side away from the first bottle mouth 111.

[0097] Further, in one embodiment, as Figure 3 and Figure 4 shown, the convex teeth 14 or the tooth grooves 16 are located on the second end face of the limiting member 131. When the limiting member 131 is assembled onto the filter bottle body 11, the first end face faces the end of the filter bottle body 11 away from the first bottle mouth 111, and the second end face faces the filter bottle cap 12. When the filter bottle cap 12 is screwed onto the filter bottle body 11, the convex teeth 14 just insert into the tooth grooves 16.

[0098] When Figure 3 the shown limit ring 13 is assembled onto Figure 4 the filter bottle body 11 of the shown angle-removable filter element assembly 10, the first end face faces downward and the second end face faces upward.

[0099] Further, in one embodiment, as Figure 3 shown, the limiting member 131 is of an annular structure. The second end face of the limiting member 131 is provided with convex teeth 14 or tooth grooves 16. The convex teeth 14 or tooth grooves 16 are located between the first limiting rib 134 and the second limiting rib 135. The anti-retreat protrusion 136 is located at a position on the snap 132 close to the first end face. During the assembly process, the guiding protrusion 113 is limited between the first limiting rib 134 and the second limiting rib 135. After the anti-retreat protrusion 136 passes over the guiding protrusion 113, the position of the convex teeth 14 (tooth grooves 16) on the limiting member 131 just corresponds to the tooth grooves 16 (convex teeth 14) on the filter bottle cap 12. Adjacent arrangement of the convex teeth 14 or tooth grooves 16 with the snap 132, the first limiting rib 134 and the second limiting rib 135 can effectively improve the assembly accuracy.

[0100] Further, in another embodiment, the limiting member 131 is in sliding fit with the filter bottle cap 12, and the sliding direction is the axial direction of the filter bottle cap 12. In other words, the limiting member 131 is arranged on the filter bottle cap 12. The limiting member 131 is initially assembled onto the filter bottle body 11 together with the filter bottle cap 12, and then the limiting member 131 is moved relative to the filter bottle cap 12 so that the limiting member 131 moves to the locking position. When the limiting member 131 reaches the locking position, the limiting member 131 and the filter bottle body 11 are in cooperation and limitation, so that the filter bottle body 11 cannot rotate relative to the limiting member 131, and further the filter bottle cap 12 cannot be loosened from the first bottle mouth 111.

[0101] Specifically, in one embodiment, one of the limiting member 131 and the filter bottle body 11 is provided with convex teeth 14, and the other is provided with tooth grooves 16. When the limiting member 131 moves forward to the locking position, the convex teeth 14 are inserted into the tooth grooves 16 to limit the rotation of the filter bottle body 11 relative to the limiting member 131. When the limiting member 131 moves out of the locking position, the convex teeth 14 withdraw from the tooth grooves 16, so that the filter bottle cap 12 and the limiting member 131 can be removed from the filter bottle body 11 together, and then the filter element 19 in the filter bottle body 11 can be taken out and replaced.

[0102] Further specifically, in one embodiment, the limiting member 131 is located on the outer side surface of the filter bottle cap 12, the convex tooth 14 is located on the outer side surface of the filter bottle body 11, and the tooth groove 16 is provided at a portion of the limiting member 131 facing the convex tooth 14.

[0103] Specifically, in one embodiment, the tip of the convex tooth 14 on the filter bottle body 11 can face outward along the radial direction of the filter bottle body 11. The limiting member 131 is of an annular structure, the tooth groove 16 is located on the inner side surface of the limiting member 131. When the limiting member 131 moves to the locking position, the portion of the limiting member 131 provided with the tooth groove 16 is sleeved outside the portion of the filter bottle body 11 provided with the convex tooth 14, and the convex tooth 14 is located in the tooth groove 16.

[0104] When the convex tooth 14 is an isosceles triangle convex structure, the apex angle of the convex tooth 14 is the tip of the convex tooth 14. In the embodiment where the limiting ring 13 is as shown in Figure 3 , when the limiting ring 13 is assembled onto the filter bottle body 11, the tip of the convex tooth 14 faces the filter bottle cap 12 along the axial direction of the filter bottle body 11.

[0105] Optionally, the convex tooth 14 can also be located on the limiting member 131, and the tooth groove 16 is located on the filter bottle body 11.

[0106] Further, in one embodiment, the limiting member 131 is of an annular structure, the limiting member 131 is sleeved outside the filter bottle cap 12, and the limiting member 131 can slide along the axial direction of the filter bottle cap 12. The convex teeth 14 are multiple, and the multiple convex teeth 14 are arranged at intervals along the circumferential direction of the filter bottle body 11. The tooth grooves 16 are multiple, and each convex tooth 14 corresponds to multiple tooth grooves 16. The tooth grooves 16 corresponding to the same convex tooth 14 are sequentially connected to form a tooth groove group 15, and the multiple tooth groove groups 15 are arranged at intervals in the circumferential direction of the limiting member 131.

[0107] Similar to the solution of slidably arranging the limiting ring 13 on the filter bottle body 11, with the limiting member 131 sleeved outside the filter bottle cap 12 and the setting of the tooth groove group 15, the requirement for the alignment accuracy between the limiting member 131 and the filter bottle body 11 during the assembly process can be reduced, as long as the convex tooth 14 is inserted into one of the tooth grooves 16 in the corresponding tooth groove group 15.

[0108] Further, in one embodiment, as shown in Figure 4As shown, the detachable filter element assembly 10 further includes an end cap 17, which is connected to the filter bottle cap 12 and is located within the space enclosed by the filter bottle cap 12. When the filter bottle cap 12 is assembled to the first bottle mouth 111 of the filter bottle body 11, the end cap 17 moves together with the filter bottle cap 12 and inserts into the filter bottle body 11 to block the first bottle mouth 111.

[0109] During the disassembly process, after the limit between the limit ring 13 and the filter bottle cap 12 is released, when the filter bottle cap 12 is unscrewed and removed from the filter bottle body 11, the end cap 17 moves together with the filter bottle cap 12, so that the end cap 17 is withdrawn from the filter bottle body 11, and then the filter element 19 in the filter bottle body 11 is replaced.

[0110] Further, as Figure 4 shown, a first sealing ring 171 is provided between the end cap 17 and the inner wall at the first bottle mouth 111 of the filter bottle body 11 to ensure that the first bottle mouth 111 can be reliably blocked after the end cap 17 is inserted into the filter bottle body 11.

[0111] Further, when the filter bottle cap 12 rotates relative to the filter bottle body 11, in order to prevent the end cap 17 from rotating relative to the filter bottle body 11, resulting in a large resistance during the screwing process and inconvenient disassembly. In one embodiment, as Figure 4 、 Figure 5 、 Figure 12 and Figure 13 shown, the detachable filter element assembly 10 further includes a connecting member 18. The end cap 17 is movably connected to the bottom wall of the filter bottle cap 12 through the connecting member 18, so that the filter bottle cap 12 does not drive the end cap 17 to rotate when rotating. When the filter bottle cap 12 is assembled to the filter bottle body 11, the bottom wall of the filter bottle cap 12 can squeeze the end cap 17 to make the end cap 17 insert into the filter bottle body 11; when the filter bottle cap 12 is removed from the filter bottle body 11, the filter bottle cap 12 can pull out the end cap 17 from the filter bottle through the connecting member 18.

[0112] Specifically, as Figure 4 、 Figure 5 and Figure 12 shown, in one embodiment, an installation body 121 is provided on the inner side surface of the bottom wall of the filter bottle cap 12. As Figure 12 and Figure 13 shown, the surface of the end cap 17 facing the bottom wall of the filter bottle cap 12 is the third end surface 173, and the end surface of the end cap 17 facing the inside of the filter bottle body 11 is the fourth end surface 174. As Figure 13As shown, the end cap 17 is provided with a mounting hole 175 which penetrates through the third end face 173 and the fourth end face 174 of the end cap 17. The mounting body 121 is inserted into the mounting hole 175, and the end cap 17 can rotate relative to the mounting body 121. As Figure 4 and Figure 5 shown, one end of the connecting member 18 is connected to the mounting body 121, and the other end of the connecting member 18 is in limit fit with the end cap 17 for restricting the end cap 17 from moving axially relative to the connecting member 18 in the filter bottle cap 12. Thus, when the filter bottle cap 12 rotates relative to the filter bottle body 11, the end cap 17 will not rotate following the filter bottle cap 12, but the end cap 17 will move axially in the filter bottle cap 12 following the filter bottle cap 12.

[0113] Specifically, as Figure 5 shown, the connecting member 18 is a screw, the screw is arranged in the mounting body 121, and the nut of the screw is in limit fit with the end cap 17 to restrict the end cap 17 from moving axially relative to the connecting member 18 in the filter bottle cap 12, but the nut is spaced from the side wall of the mounting hole 175, so that the end cap 17 will not rotate following the filter bottle cap 12.

[0114] Further specifically, as Figure 12 shown, there is a space between the side wall of the end cap 17 and the side wall of the filter bottle cap 12, so that when the end cap 17 is inserted into the filter bottle body 11, the side wall of the filter bottle cap 12 is sleeved outside the filter bottle body 11.

[0115] Furthermore, as Figure 5 and Figure 12 shown, in an embodiment, one end of the connecting member 18 for being in limit fit with the end cap 17 is a limit end 181, and the inner wall of the mounting hole 175 is provided with a limit protrusion 176 which is limited on one side of the limit end 181 close to the third end face 173, so as to restrict the end cap 17 from moving axially relative to the connecting member 18 in the filter bottle cap 12.

[0116] When the connecting member 18 is the screw, the limit end 181 is the nut of the screw, and the nut of the screw is located on one side of the limit protrusion 176 away from the third end face 173.

[0117] Specifically, as Figure 5 shown, there are multiple limit protrusions 176, and the multiple limit protrusions 176 are arranged at intervals in the circumferential direction of the mounting hole 175. Or the limit protrusion 176 is an annular protrusion arranged along the circumferential direction of the mounting hole 175.

[0118] The aperture of the space surrounded by the limiting protrusion 176 is smaller than the outer diameter of the limiting end 181, so as to limit the limiting end 181 on the side of the limiting protrusion 176 away from the third end face 173.

[0119] Further, as Figure 13 shown, an abutting protrusion 177 is provided on the end face of the limiting protrusion 176 close to the limiting end 181. The abutting protrusion 177 abuts against the limiting end 181 to reduce the friction force between the connecting member 18 and the end cover 17 when the filter bottle cap 12 rotates.

[0120] Specifically, as Figure 13 shown, there are a plurality of the abutting protrusions 177, and the plurality of abutting protrusions 177 are arranged at intervals in the circumferential direction of the mounting hole 175.

[0121] Further, in one embodiment, a gasket (not shown in the figure) is further provided between the limiting end 181 and the limiting protrusion 176 to further reduce the friction force indirectly applied to the filter bottle cap 12 by the end cover 17 when rotating the filter bottle cap 12.

[0122] Further, as Figure 5 shown, a second sealing ring 172 is provided between the side wall of the mounting body 121 and the mounting hole 175. To prevent the liquid in the filter bottle body 11 from leaking from the gap between the mounting body 121 and the mounting hole 175.

[0123] Further, as Figure 5 shown, the second sealing ring 172 is located on the side of the limiting protrusion 176 close to the third end face 173, so that the limiting protrusion 176 can effectively prevent the second sealing ring 172 from falling off from one end of the mounting body 121 away from the bottom wall of the filter bottle cap 12.

[0124] Further, in order to improve the stability of the limiting position of the second sealing ring 172 on the mounting body 121, as Figure 5 and Figure 10 shown, the mounting body 121 can be divided into a first section and a second section in the axial direction of the filter bottle cap 12. The first section is connected between the second section and the bottom wall of the filter bottle cap 12. The outer diameter of the first section is larger than the outer diameter of the second section, forming a step on the outer side surface of the mounting body 121. The second sealing ring 172 is sleeved on the second section, and the first section is limited on the side of the second sealing ring 172 close to the third end face 173.

[0125] Thus, in combination with the limiting protrusion 176 and the first section, the position of the second sealing ring 172 on the mounting body 121 is limited to ensure the sealing effectiveness of the second sealing ring 172.

[0126] Further, as Figure 10 and Figure 12 shown, a support member 122 is provided on the inner side of the bottom wall of the filter bottle cap 12. The support member 122 is located between the mounting body 121 and the side wall of the filter bottle cap 12. The support member 122 abuts against the end cap 17 to prevent the end cap 17 from being deformed and fractured under pressure. Specifically, the support member 122 can be a support rib.

[0127] Further, in another embodiment, a water purifier is provided, which includes the filter element locking unit described in any one of the above embodiments. By adopting the filter element locking unit described in any one of the above embodiments, during the assembly process after replacing the filter element 19, only the filter bottle cap 12 needs to be screwed onto the convex teeth 14 and inserted into one of the tooth grooves 16. A certain assembly error is allowed, the requirement for manufacturing precision is reduced, and the convenience of assembly is improved at the same time.

[0128] Further, in another embodiment, a water purifier is provided, which includes the filter bottle body unit described in any one of the above embodiments. Based on the gap between the guiding protrusion 113 and the side wall of the guiding groove 133, the limiting member 131 can rotate relative to the filter bottle body 11 within a certain angle, facilitating the cooperation of the convex teeth 14 and the tooth grooves 16, improving the convenience of assembly, and reducing the requirement for manufacturing precision at the same time.

[0129] Further, in one embodiment, a water purifier is provided, which includes the detachable filter element assembly 10 described in any one of the above embodiments.

[0130] By adopting the detachable filter element assembly 10 described in any one of the above embodiments, the convenience of replacing the filter element 19 is improved while preventing water leakage during the disassembly and replacement of the filter element 19.

[0131] Further, in one embodiment, as Figure 2 shown, the water purifier further includes a filter element mounting seat 20. The filter bottle body 11 is screwed onto the filter element mounting seat 20. The screwing direction of the filter bottle body 11 is the same as the rotation direction of the filter bottle cap 12 when it is screwed onto the filter bottle body 11. The second bottle mouth 112 of the filter bottle body 11 communicates with the filter element mounting seat 20.

[0132] The bottle mouths at both ends of the filter bottle body 11 are the first bottle mouth 111 and the second bottle mouth 112 respectively. The filter element 19 in the filter bottle is communicated with each water port on the filter element mounting seat 20 through the second bottle mouth 112. The filter bottle cap 12 is detachably assembled at the first bottle mouth 111 of the filter bottle body 11. Based on the fact that the screwing direction of the filter bottle body 11 is consistent with the rotation direction of the filter bottle cap 12 when screwing the filter bottle cap 12 onto the filter bottle body 11, therefore, in order to avoid the situation where the filter bottle body 11 and the filter element mounting seat 20 are not separated during the disassembly process, while the filter bottle cap 12 loosens first. The limiting member 131 is further provided. Using the limiting member 131 as an intermediate element can not only avoid the situation of the filter bottle cap 12 loosening and leaking water first, but also smoothly remove the filter bottle cap 12 after the filter bottle body 11 and the filter element mounting seat 20 are separated.

[0133] Further, in one embodiment, as Figure 7 and Figure 8 shown, the water purifier further includes a whole machine housing 30. The filter element mounting seat 20 is connected to the whole machine housing 30. The whole machine housing 30 is provided with a locking protrusion 31. When the detachable filter element assembly 10 is assembled with the filter element mounting seat 20, the locking protrusion 31 abuts and limits the limiting member 131 at the locking position.

[0134] When the limiting member 131 is slidably fitted on the filter bottle body 11, after the filter bottle body 11 and the filter element mounting seat 20 are assembled, the relative position between the filter bottle body 11 and the locking protrusion 31 is fixed, and the locking protrusion 31 abuts and limits the limiting member 131 at the locking position.

[0135] During the disassembly process, when the filter bottle body 11 is not removed from the filter element mounting seat 20, the locking protrusion 31 always limits the limiting member 131 at the locking position. As the filter bottle body 11 is gradually pulled out from the whole machine housing 30, the limiting member 131 gradually disengages from the locking protrusion 31. At this time, the limiting member 131 can be pushed in the direction away from the first bottle mouth 111, so that the limiting member 131 exits the locking position and the convex teeth 14 exit the tooth grooves 16.

[0136] Further, in one embodiment, a filter element 19 is installed in the filter bottle. As Figure 11 shown, the filter element 19 includes a core body and an inner cylinder 191. The core body is arranged in the inner cylinder 191. The inner cylinder 191 is arranged at an interval from the filter bottle. A handle 193 is provided at a position on the inner cylinder 191 close to the first bottle mouth 111.

[0137] After the filter bottle cap 12 is removed from the filter bottle body 11, the filter element 19 is drawn out of the filter bottle body 11 through the handle 193. Then, after the core body in the inner cylinder 191 is replaced, the filter element 19 with the new core body is installed into the filter bottle.

[0138] Further, as Figure 11 shown, a flushing drain hole 192 is provided on the inner cylinder 191. When the filter element 19 can be cleaned by flushing to restore its water purification ability, the filter element 19 does not need to be replaced first. At this time, the flushing water can be injected into the filter element 19 from the raw water inlet and / or the pure water outlet of the detachable filter element assembly 10 to flush the core body in the filter element 19, and the flushing sewage is discharged from the flushing drain hole 192 on the inner cylinder 191 to the gap between the inner cylinder 191 and the filter bottle body 11, and then discharged out of the filter bottle body 11 from the concentrated water drain port on the filter bottle body 11.

[0139] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention.

[0140] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0141] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0142] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "below" and "beneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0143] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0144] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0145] The above-described embodiments merely represent several embodiments of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent shall be subject to the appended claims.

Claims

1. A limit ring, characterized in that, It includes a limiting member. The limiting member is of an annular structure. On the inner side of the limiting member, a first limiting rib and a second limiting rib are arranged at intervals in the circumferential direction of the limiting member. Both the first limiting rib and the second limiting rib extend along the axial direction of the limiting member. The part of the limiting member located between the first limiting rib and the second limiting rib is a snap. On the inner side of the snap, there is a backstop protrusion, and the snap can be elastically deformed by being extruded outwards. On the second end face of the limiting member, there are convex teeth or tooth grooves, and the convex teeth and the tooth grooves are respectively used for inserting and mating with the tooth grooves and convex teeth provided on the filter bottle cap.

2. The limit ring according to claim 1, wherein, There is a notch between the part of the limiting member where the first limiting rib is provided and the snap, and there is a notch between the part of the limiting member where the second limiting rib is provided and the snap.

3. The limit ring according to claim 2, wherein The notch penetrates the first end face of the limiting member, and the backstop protrusion is located at the part of the snap close to the first end face.

4. The limit ring according to claim 1, wherein The convex teeth or tooth grooves are located between the first limiting rib and the second limiting rib.

5. The limiting ring according to any one of claims 1 to 4, characterized in that, The first limiting rib, the second limiting rib and the snap form a limiting group. There are multiple such limiting groups, and the multiple limiting groups are arranged at intervals in the circumferential direction of the limiting member.

6. A detachable filter element assembly, characterized in that, It includes a filter bottle body and the limiting ring according to any one of claims 1 to 5. The filter bottle body is provided with a first bottle mouth for opening and closing cooperation with the filter bottle cap. The limiting ring is sleeved outside the filter bottle body, and the limiting ring can slide axially along the filter bottle body. On the filter bottle body, there is a guiding protrusion, and the guiding protrusion is located between the first limiting rib and the second limiting rib. The guiding protrusion is limited to the side of the backstop protrusion close to the first bottle mouth of the filter bottle body.

7. The detachable filter element assembly according to claim 6, characterized in that, Outside the filter bottle body, there is an anti-falling protrusion, and the anti-falling protrusion is limited to the side of the backstop protrusion away from the first bottle mouth. Axially on the filter bottle body, the backstop protrusion can move between the anti-falling protrusion and the guiding protrusion.

8. The detachable filter element assembly according to claim 7, characterized in that The anti-falling protrusion surrounds the filter bottle body for at least one week in the circumferential direction.

9. The detachable filter element assembly according to any one of claims 6 to 8, characterized in that, It further includes a filter bottle cap. The filter bottle cap is screwed at the first bottle mouth of the filter bottle body to form a filter bottle for placing a filter element. There is a concave-convex fit between the filter bottle cap and the limiting ring to prevent the filter bottle cap from being unscrewed and loosened from the first bottle mouth of the filter bottle body to open the first bottle mouth.

10. A water purifier, characterized in that, It includes the detachable filter element assembly according to any one of claims 6 to 9.

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