Filter element locking unit and water purifier

Abstract

The present invention relates to a filter element locking unit and a water purifier, which include a filter bottle body, a filter bottle cap and a limiting member. The filter bottle cap can be screwed onto the first bottle mouth of the filter bottle body to form a filter bottle for placing a filter element. One of the limiting member and the filter bottle is provided with convex teeth, and the other is provided with a set of tooth grooves. The set of tooth grooves includes at least two tooth grooves sequentially connected in the circumferential direction of the filter bottle. When the filter bottle cap is screwed to seal the first bottle mouth, the convex teeth are inserted into the tooth grooves to limit the filter bottle cap from loosening and opening the first bottle mouth. Based on the fact that the set of tooth grooves includes at least two tooth grooves sequentially connected in the circumferential direction of the filter bottle, during the process of replacing the filter element in the filter bottle, as long as the filter bottle cap is screwed so that the convex teeth are inserted into one of the tooth grooves, the filter bottle cap can be limited from loosening and opening the first bottle mouth, avoiding water leakage, allowing a certain assembly error, reducing the requirement for manufacturing precision, and at the same time improving the convenience of assembly.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification equipment, particularly to a filter element locking unit 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 validity period. At this time, the water purification capacity of the water purifier can be restored and its service life can be extended by replacing the filter element.

[0003] Based on the fact that the screwing direction of the filter cap relative to the filter bottle body is the same as that 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, after replacing the new filter element into the filter bottle, in order to enable the filter cap and the filter bottle body to be reliably assembled together, the manufacturing precision requirements are relatively high. Summary of the Invention

[0004] Aiming at the problem that after replacing the filter element, in order to enable the filter cap and the filter bottle body to be reliably assembled together, the manufacturing precision requirements are relatively high, the present invention provides a filter element locking unit and a water purifier, which can reduce the requirements for manufacturing precision.

[0005] A filter element locking unit includes a filter bottle body, a filter cap and a limiting member. The filter cap can be screwed onto the first bottle mouth of the filter bottle body to form a filter bottle for placing a filter element. One of the limiting member and the filter bottle is provided with convex teeth, and the other is provided with a set of tooth grooves. The set of tooth grooves includes at least two tooth grooves arranged in sequence in the circumferential direction of the filter bottle. When the filter cap is screwed to block the first bottle mouth, the convex teeth are inserted into the tooth grooves to limit the filter cap from loosening and opening the first bottle mouth at the first bottle mouth.

[0006] The above solution provides a filter element locking unit. Based on the fact that the set of tooth grooves includes at least two tooth grooves connected in sequence in the circumferential direction of the filter bottle, during the process of replacing the filter element in the filter bottle, as long as the filter cap is screwed so that the convex teeth are inserted into one of the tooth grooves, the filter cap can be limited from loosening and opening at the first bottle mouth, avoiding water leakage, allowing a certain assembly error, reducing the requirements for manufacturing precision, and at the same time improving the convenience of assembly.

[0007] In one embodiment, the convex teeth are an isosceles triangle convex structure, and the apex angle of the convex teeth is 55° - 65°.

[0008] In one embodiment, when the convex tooth is located in the tooth groove, the force F1 that causes the convex tooth to elastically deform and disengage from the tooth groove when the filter bottle is screwed is greater than the force F2 for unscrewing the filter bottle body from the filter element mounting seat.

[0009] In one embodiment, the height of the convex tooth is 3 mm to 5 mm.

[0010] In one embodiment, the limiting member is in sliding fit with the filter bottle body, and the limiting member can move back and forth relative to the filter bottle body in a direction away from or close to the first bottle mouth. When the limiting member slides to the locking position, the convex tooth can be inserted into the tooth groove, and the tooth groove is formed on the end face of the filter bottle cap facing the limiting member.

[0011] In one embodiment, a guiding protrusion is provided outside the filter bottle body, the limiting member covers the guiding protrusion, and first limiting ribs and second limiting ribs are provided on the surface of the limiting member facing the guiding protrusion and are arranged along the sliding direction. The first limiting rib and the second limiting rib are arranged at intervals relative to each other to form a guiding groove, and the guiding protrusion is located in the guiding groove.

[0012] In one embodiment, when the limiting member moves to the locking position and the convex tooth is located in the tooth groove, the guiding protrusion is in clearance fit with the first limiting rib and / or the second limiting rib, and the clearance width between the guiding protrusion and the first limiting rib is less than the circumferential distance required for the convex tooth to move out of the corresponding tooth groove group.

[0013] In one embodiment, a tooth groove group includes 2n + 1 tooth grooves, where n is an integer, the pitch of the tooth groove group is h. When the convex tooth is located in the middle tooth groove of this tooth groove group, the guiding protrusion is in clearance fit with both the first limiting rib and the second limiting rib, and the clearance width between the guiding protrusion and the first limiting rib and the second limiting rib is d, and 0.5h < d ≤ (n + 0.5)h.

[0014] In one embodiment, the convex tooth is located on the end face of the limiting member close to the first bottle mouth, and the convex tooth is located between the first limiting rib and the second limiting rib.

[0015] In one embodiment, the limiting member is of an annular structure, the limiting member is sleeved outside the filter bottle body, the limiting member can slide along the axial direction of the filter bottle body, there are multiple convex teeth, and the multiple convex teeth are arranged at intervals in the circumferential direction of the limiting member. There are multiple tooth groove groups, and the multiple tooth groove groups are arranged at intervals in the circumferential direction of the filter bottle cap. The convex teeth and the tooth groove groups correspond to each other one by one.

[0016] In one embodiment, the limiting member is slidably engaged with the filter bottle body, and the sliding direction is away from the first bottle mouth. When the limiting member moves out of the locking position, the convex teeth move out of the tooth grooves.

[0017] A water purifier includes the above-mentioned filter element locking unit, and a filter element is installed in the filter bottle.

[0018] The above solution provides a water purifier. By adopting the filter element locking unit described in any of the above embodiments, during the assembly process after replacing the filter element, it is only necessary to screw the filter bottle cap until the convex teeth are inserted into one of the tooth grooves, allowing a certain assembly error, reducing the requirement for manufacturing precision, and at the same time 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 to 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 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 disassembly principle diagram of the detachable filter element assembly described in this embodiment;

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

[0028] Figure 8 ForFigure 7 Partial enlarged view at B in the middle

[0029] Figure 9 Structural schematic diagram of the filter bottle cap described in this embodiment

[0030] Figure 10 is Figure 9 Cross-sectional view of the shown filter bottle cap

[0031] Figure 11 Structural schematic diagram of the filter element described in this embodiment

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

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

[0034] Explanation of reference numerals in the drawings:

[0035] 10. Removable filter element assembly; 11. Filter bottle body; 111. First bottle mouth; 112. Second bottle mouth; 113. Guide protrusion; 114. Anti-falling protrusion; 12. Filter bottle cap; 121. Installation 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 protrusion; 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. Installation hole; 176. Limiting protrusion; 177. Abutting protrusion; 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 protrusion. Detailed implementation manners

[0036] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the following will describe the detailed implementation manners of the present invention with reference to the accompanying drawings in detail. 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 shown in Figure 1 , Figure 2 and Figure 3As shown, in one embodiment, a detachable 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 snap - fastened onto the filter element mounting seat 20 of the water purifier, so that the filter element 19 in the filter bottle body 11 is correspondingly connected to each water port on the filter element mounting seat 20.

[0038] Further, as Figure 1 and Figure 2 shown, in one embodiment, the detachable filter element assembly 10 further includes a filter bottle cap 12. 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 being used for a period of time, the filter bottle body 11 can be first removed from the filter element mounting seat 20 to separate the water flow path in the water purifier 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, no water leakage will occur 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 snap - fastened 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. The limiting member 131 is used as an intermediate element between the filter bottle body 11 and the filter bottle cap 12 to prevent the situation that 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 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 the first bottle mouth 111. When the limiting member 131 moves forward to the locking position, as Figure 4 and Figure 6As shown, the filter bottle body 11 and the filter bottle cap 12 are both in limit fit 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, enabling the filter bottle cap 12 to be unscrewed from the filter bottle body 11.

[0043] When the filter bottle body 11 is assembled onto 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 loosen and open the first bottle mouth 111 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, causing the filter bottle body 11 and the filter element mounting seat 20 to be rotationally disassembled.

[0044] Generally, after the detachable filter element assembly 10 is assembled onto the water purifier, the end where the filter bottle cap 12 is located is exposed. For convenience during the disassembly process, generally, the force is 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] After 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. Moreover, 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 is 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 at the first bottle mouth 111.

[0048] Alternatively, in another embodiment, a snap locking member may be provided on the overall 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 overall 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 may be slidably engaged with the filter bottle body 11, or the limiting member 131 is slidably engaged with the filter bottle cap 12. This enables the limiting member 131 to move to the locking position and also to move out of the locking position under certain circumstances.

[0050] For example, in one embodiment, as Figure 4 shown, the limiting member 131 is slidably engaged 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 or towards 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 cooperation relationship between the limiting member 131 and the filter bottle cap 12 can be achieved by concave-convex cooperation. Specifically, a convex tooth 14 can be provided on one of the limiting member 131 and the filter bottle cap 12, and a tooth groove 16 is provided on the other. When the limiting member 131 moves forward to the locking position, the convex tooth 14 is inserted into the tooth groove 16 to restrict the filter bottle cap 12 from rotating relative to the limiting member 131 to loosen and open the first bottle mouth 111. When the limiting member 131 moves out of the locking position, the convex tooth 14 exits the tooth groove 16, and the filter bottle cap 12 can rotate relative to the limiting member 131, and thus the filter bottle cap 12 can be unscrewed from the filter bottle body 11.

[0053] Furthermore, the freedom of the limiting member 131 to rotate circumferentially relative to the filter bottle body 11 is restricted. Thus, 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. However, 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. 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] For the filter bottle body unit provided by the above solution, the cooperation between the guiding protrusion 113 and the guiding groove 133 between the limiting member 131 and the filter bottle body 11 restricts the rotation of the limiting member 131 relative to the filter bottle body 11 in the screwing direction of the filter bottle cap 12. Thus, after the filter bottle cap 12 and the limiting member 131 are engaged 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 engagement between the convex teeth 14 and the tooth grooves 16, there is a clearance fit between the side wall of the guiding groove 133 and the guiding protrusion 113, enabling the limiting member 131 to 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 engaged together, improving the convenience of assembly and at the same time reducing the requirement 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 serve both as the basis for the sliding fit of the limiting member 131 relative to the filter bottle body 11 and as the limiting basis for preventing the limiting member 131 from falling off the filter bottle body 11.

[0057] For example, in one embodiment, as Figure 3 、 Figure 4 、 Figure 6 and Figure 7 shown, the limiting member 131 covers the guiding protrusion 113. As Figure 3As shown, on the surface of the limiting member 131 facing the guiding protrusion 113, a first limiting rib 134 and a second limiting rib 135 are provided, both arranged along the axial direction of the filter bottle body 11. The first limiting rib 134 and the second limiting rib 135 are spaced apart relatively, forming the guiding groove 133. The guiding protrusion 113 can slide axially along the filter bottle body 11 in the guiding groove 133. Under the guiding effect of the guiding groove 133, the limiting member 131 can slide axially along the filter bottle body 11 to the locking position, or can also slide away from the locking position, switching between the two states.

[0058] The first limiting rib 134 and the second limiting rib 135 constitute the two side walls of the guiding groove 133. In one embodiment, when the limiting member 131 moves to the locking position and the convex teeth 14 are located in the tooth grooves 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 teeth 14 and the tooth grooves 16 can be fitted together, improving the convenience of assembly and at the same time reducing the requirement for manufacturing precision.

[0059] Further, in one embodiment, as Figure 3 shown, on the side surface of the limiting member 131 facing the filter bottle body 11, a retaining protrusion 136 is provided. 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, it is avoided that the limiting member 131 slides off from the end where the first bottle mouth 111 is located.

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

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

[0062] Further specifically, in one embodiment, as Figure 1 and Figure 2 shown, the anti-falling protrusion 114 surrounds the filter bottle body 11 at least once in the circumferential direction. The reliability of preventing falling is improved. No matter how the anti-drop protrusion 136 is distributed in the circumferential direction of the filter bottle body 11, the anti-falling protrusion 114 can limit it. Moreover, when the thickness of the anti-falling protrusion 114 in the radial direction of the filter bottle body 11 is sufficient, the anti-falling protrusion 114 can directly block the end face of the limiting member 131, so as to prevent the limiting member 131 from falling from the end of the filter bottle body 11 far from the first bottle mouth 111.

[0063] Further, in one embodiment, as Figure 4 shown, when the convex tooth 14 is inserted into the tooth groove 16, the anti-drop protrusion 136 is spaced apart 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 limit 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-drop 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-drop 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 3As shown, in one embodiment, the convex teeth 14 may be located on the limiting member 131 near the filter bottle cap 12. The tooth grooves 16 are formed on the filter bottle cap 12 at a position facing the convex teeth 14. Alternatively, in another embodiment, the convex teeth 14 are located on the filter bottle cap 12 near the limiting member 131, and the tooth grooves 16 are formed on the limiting member 131 at a position facing the convex teeth 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 teeth 14 are correspondingly matched with the tooth groove group 15.

[0069] Thus, during the assembly process, as long as the convex teeth 14 are inserted into one of the tooth grooves 16, the filter bottle cap 12 can be restricted from loosening and opening at the first bottle mouth 111, avoiding water leakage, allowing a certain assembly error, reducing the requirement for manufacturing precision, and at the same time improving the convenience of assembly.

[0070] In particular, when there are multiple convex teeth 14 and multiple tooth groove groups 15, and the convex teeth 14 and the tooth groove groups 15 correspond to each other 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 teeth 14 are located on the end face of the limiting member 131 near the first bottle mouth 111. As Figure 9 and Figure 10 shown, the tooth grooves 16 are located on the end face of the filter bottle cap 12 facing the convex teeth 14. In other words, the tooth groove group 15 may be formed on the end face of the filter bottle cap 12 facing the limiting member 131. 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, the end face of the limiting member 131 provided with the convex teeth 14 faces the end face of the filter bottle cap 12, and the convex teeth 14 are located in the tooth grooves 16.

[0072] Optionally, the convex teeth 14 and the tooth grooves 16 may also be arranged at other positions, as long as the convex teeth 14 can be inserted into the tooth grooves 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, asFigures 1 to 4 As shown, the limiting member 131 has 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. 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 one by one, increasing the resistance to the rotation of the filter bottle cap 12 relative to the limiting member 131.

[0076] Moreover, based on that each tooth groove group 15 corresponding to each convex tooth 14 includes at least two tooth grooves 16, thus during the assembly process, as long as each convex tooth 14 is inserted into one of the tooth grooves 16 in the corresponding 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 at the same time.

[0077] Further, in one embodiment, as Figure 3 shown, the convex tooth 14 has 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, which is inconvenient for alignment, 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] Furthermore, in one embodiment, when the protruding teeth 14 are located in the tooth grooves 16, the force applied to twist the filter bottle to elastically deform the protruding teeth 14 and disengage them from the tooth grooves 16 is F1, and the force applied to loosen the filter bottle body 11 from the filter cartridge mounting seat 20 is F2, where F1 is greater than F2. This ensures that during disassembly, the force acting on the filter bottle first removes the filter bottle body 11 from the filter cartridge mounting seat 20, rather than unscrewing the protruding teeth 14 out of the tooth grooves 16.

[0080] Based on this, in order to ensure the cooperation between the protruding teeth 14 and the tooth grooves 16 and to provide sufficient resistance, in one embodiment, the height of the protruding teeth 14 is set to 3 mm to 5 mm.

[0081] Furthermore, when the limiting member 131 moves to the locked position and the protruding tooth 14 is located in the tooth groove 16, the clearance between the guiding protrusion 113 and the first limiting rib 134 and / or the second limiting rib 135 cooperates, facilitating smooth insertion of the protruding tooth 14 into the corresponding tooth groove group 15 during assembly. 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 function, and the protruding tooth 14 will be disengaged from the corresponding tooth groove group 15.

[0082] Therefore, in one embodiment, the width of the gap between the guide protrusion 113 and the first limiting rib 134 is less than the circumferential distance required for the protruding tooth 14 to move out of the corresponding tooth groove group 15. In other words, although the limiting member 131 can rotate slightly in the circumferential direction of the filter bottle body 11, its rotation angle is limited, ensuring that the protruding tooth 14 always aligns with the corresponding tooth groove group 15 without deviation, and ensuring that the limiting member 131 does not lose its function of limiting the filter bottle cover 12.

[0083] Furthermore, in one embodiment, a tooth slot group 15 includes 2n+1 tooth slots 16, where n is an integer. That is, the number of tooth slots 16 included in a tooth slot group 15 is an odd number. The tooth pitch of the tooth slot group 15 is h. When the protruding tooth 14 is located in the centermost tooth slot 16 in the tooth slot group 15, there is a clearance fit between the guide protrusion 113 and the first and second limiting ribs 134, 135, and the gap widths between the guide protrusion 113 and the first and second limiting ribs 134, 135 are both d, and 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 guide protrusion 113 swings between the two, the width of the gap ensures that the protruding tooth 14 is always opposite to the tooth groove group 15 without deviation.

[0085] For example, specifically, in one embodiment, as Figure 9 and Figure 10 shown, the tooth socket group 15 includes 3 tooth sockets 16. When the convex tooth 14 is located in the middle tooth socket 16 of this tooth socket group 15, there is a clearance fit between the guiding protrusion 113 and 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] Furthermore, 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 and the guiding grooves 133 correspond to each other one by one. In other words, assuming that the first limiting rib 134, the second limiting rib 135 and the snap 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] Furthermore, in one embodiment, as Figure 3 shown, the convex tooth 14 is located between the first limiting rib 134 and the second limiting rib 135.

[0088] Here, the fact that the convex tooth 14 is located between the first limiting rib 134 and the second limiting rib 135 means that the convex tooth 14 is located between the extension lines of the first limiting rib 134 and 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 lines of the first limiting rib 134 and 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 socket 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 the snap 132. The anti-retreat protrusion 136 is located on the inner side of the snap 132, and the snap 132 can be elastically deformed by being extruded outwards.

[0091] During the assembly process, the limiting member 131 moves axially along the filter bottle body 11, causing the anti-retreat protrusion 136 to move from the side of the guiding protrusion 113 close to the first bottle mouth 111 to the other side. During this process, the snap button 132 undergoes elastic deformation so that the anti-retreat protrusion 136 can cross over the guiding protrusion 113. When the anti-retreat protrusion 136 reaches the side of the guiding protrusion 113 away from the first bottle mouth 111, the snap button 132 resets, causing the anti-retreat protrusion 136 to be limited by the guiding protrusion 113 on the side away from the first bottle mouth 111, thus preventing the limiting member 131 from falling off from this end of the first bottle mouth 111.

[0092] Particularly when the limiting member 131 is of an annular structure, as long as it can prevent the limiting member 131 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 3 shown, a limiting ring 13 is provided, which includes the limiting member 131. The limiting member 131 is of an annular structure. The inner side surface of the limiting member 131 is provided with a first limiting rib 134 and a second limiting rib 135 that are both arranged axially along the limiting member 131. The part of the limiting member 131 between the first limiting rib 134 and the second limiting rib 135 is the snap button 132. The inner side surface of the snap button 132 is provided with an anti-retreat protrusion 136, and the snap button 132 can be extruded outward to undergo elastic deformation.

[0094] During assembly, the limiting ring 13 can be sleeved outside the filter bottle body 11. Based on the elastic deformation ability of the snap button 132, the anti-retreat protrusion 136 can be made to be located on the side of the guiding protrusion 113 away from the first bottle mouth 111 by axially pushing the limiting ring 13 along the filter bottle body 11. At the same time, the guiding protrusion 113 is also located between the first limiting rib 134 and the second limiting rib 135, restricting the circumferential rotation of the limiting 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] Furthermore, in one embodiment, as Figure 3 shown, there is a gap between the part of the limiting member 131 where the first limiting rib 134 is provided and the snap button 132, and there is a gap between the part of the limiting member 131 where the second limiting rib 135 is provided and the snap button 132. Only one side of the snap button 132 is connected to the limiting member 131, making the snap button 132 have a certain elastic deformation ability.

[0096] Specifically, in one embodiment, as Figure 3As shown, the notch penetrates through the first end face of the limiting member 131. The anti-retreat protrusion 136 is located at a position on the snap 132 close to the first end face. The end of the snap 132 for connecting with 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, causing the anti-retreat protrusion 136 to cross over the guiding protrusion 113 and be limited by the guiding protrusion 113 on the side far 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 far 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 limiting ring 13 shown is assembled onto Figure 4 the filter bottle body 11 of the angle-detachable filter element assembly 10 shown, 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, and 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, and after the anti-retreat protrusion 136 crosses 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. Arranging the convex teeth 14 or tooth grooves 16 in proximity to 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 slidably engaged 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 provided 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 cooperatively limited, 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 a convex tooth 14, and the other is provided with a tooth groove 16. When the limiting member 131 moves forward to the locking position, the convex tooth 14 is inserted into the tooth groove 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 tooth 14 exits the tooth groove 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] More 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 in 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 tip of the convex tooth 14 is the apex 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. [[ID= sixteen]]

[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 axially along the filter bottle cap 12. There are multiple convex teeth 14, and the multiple convex teeth 14 are arranged at intervals along the circumferential direction of the filter bottle body 11. There are multiple tooth grooves 16, 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, the above-mentioned limiting member 131 is sleeved outside the filter bottle cap 12. The arrangement of the tooth groove group 15 can reduce the requirement for the alignment accuracy between the limiting member 131 and the filter bottle body 11 during the assembly process. As long as the convex tooth 14 is inserted into one of the tooth grooves 16 of the corresponding tooth groove group 15.

[0108] Further, in one embodiment, as Figure 4 shown, the detachable filter element assembly 10 further includes an end cap 17. The end cap 17 is connected to the filter bottle cap 12, and the end cap 17 is located within the space surrounded 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 is inserted into the filter bottle body 11 to block the first bottle mouth 111.

[0109] During the disassembly process, when the limit between the limiting ring 13 and the filter bottle cap 12 is released, and 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 of 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, which may cause a large resistance during the screwing process and inconvenient disassembly. In one embodiment, as Figure 4 、 Figure 5 、 Figure 12 and Figure 13As shown, the detachable filter element assembly 10 also includes a connecting piece 18, and the end cap 17 is movably connected to the bottom wall of the filter bottle cover 12 through the connecting piece 18, so that the filter bottle cover 12 will not drive the end cap 17 to rotate when it rotates. When the filter bottle cover 12 is assembled on the filter bottle body 11, the bottom wall of the filter bottle cover 12 can squeeze the end cap 17 so that the end cap 17 is inserted into the filter bottle body 11; when the filter bottle cover 12 is removed from the filter bottle body 11, the filter bottle cover 12 can pull the end cap 17 out of the filter bottle through the connecting piece 18.

[0112] Specifically, if Figure 4 、 Figure 5 and Figure 12 As shown, in one embodiment, a mounting body 121 is provided on the inner side of the bottom wall of the filter bottle cover 12. Figure 12 and Figure 13 As shown, the surface of the end cap 17 facing the bottom wall of the filter bottle cover 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. Figure 13 As shown, the end cover 17 is provided with a mounting hole 175, and the mounting hole 175 passes through the third end surface 173 and the fourth end surface 174 of the end cover 17. The mounting body 121 is inserted into the mounting hole 175, and the end cover 17 can rotate relative to the mounting body 121. Figure 4 and Figure 5 As shown, one end of the connector 18 is connected to the mounting body 121, and the other end of the connector 18 is limitedly engaged with the end cap 17 to limit the movement of the end cap 17 relative to the connector 18 in the axial direction of the filter bottle cover 12. Therefore, when the filter bottle cover 12 rotates relative to the filter bottle body 11, the end cap 17 will not rotate with the filter bottle cover 12, but will move with the filter bottle cover 12 in the axial direction of the filter bottle cover 12.

[0113] Specifically, if Figure 5 As shown, the connecting member 18 is a screw, which is arranged in the mounting body 121. The nut of the screw is limitedly engaged with the end cover 17 to limit the axial movement of the end cover 17 relative to the connecting member 18 in the filter bottle cover 12, but the nut is spaced apart from the side wall of the mounting hole 175, so that the end cover 17 will not rotate with the filter bottle cover 12.

[0114] More specifically, Figure 12 As shown, the side wall of the end cap 17 is spaced apart from the side wall of the filter bottle cover 12 , so that when the end cap 17 is inserted into the filter bottle body 11 , the side wall of the filter bottle cover 12 is sleeved outside the filter bottle body 11 .

[0115] Further, as shown in Figure 5 and Figure 12 In one embodiment, one end of the connecting member 18 for limiting cooperation with the end cap 17 is a limiting end 181. A limiting protrusion 176 is provided on the inner wall of the mounting hole 175. The limiting protrusion 176 is limited to the side of the limiting end 181 close to the third end face 173, thereby restricting the movement of the end cap 17 relative to the connecting member 18 in the axial direction of the filter bottle cap 12.

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

[0117] Specifically, as shown in Figure 5 There are multiple limiting protrusions 176, and the multiple limiting protrusions 176 are arranged at intervals in the circumferential direction of the mounting hole 175. Or the limiting 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, thereby restricting the limiting end 181 to the side of the limiting protrusion 176 away from the third end face 173.

[0119] Further, as shown in Figure 13 A butt joint protrusion 177 is provided on the end face of the limiting protrusion 176 close to the limiting end 181. The butt joint protrusion 177 abuts against the limiting end 181, reducing the frictional force between the connecting member 18 and the end cap 17 when the filter bottle cap 12 rotates.

[0120] Specifically, as shown in Figure 13 There are multiple butt joint protrusions 177, and the multiple butt joint 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 provided between the limiting end 181 and the limiting protrusion 176, further reducing the frictional force indirectly applied to the filter bottle cap 12 by the end cap 17 when rotating the filter bottle cap 12.

[0122] Further, as shown in Figure 5 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 shown in Figure 5As 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 the 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 that 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, ensuring 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 surface 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, and is used 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, including the filter element locking unit described in any of the above embodiments. By adopting the filter element locking unit described in any of the above embodiments, during the assembly process after replacing the filter element 19, only the filter bottle cap 12 needs to be screwed until the convex teeth 14 are inserted into one of the tooth grooves 16, allowing a certain assembly error, reducing the requirement for manufacturing precision, and at the same time improving the convenience of assembly.

[0128] Further, in another embodiment, a water purifier is provided, including the filter bottle body unit described in any 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 at the same time reducing the requirement for manufacturing precision.

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

[0130] By adopting the detachable filter element assembly 10 described in any of the above embodiments, the convenience of replacing the filter element 19 is improved while avoiding 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 screwing the filter bottle cap 12 onto the filter bottle body 11. The second bottle mouth 112 of the filter bottle body 11 is communicated with the filter element mounting seat 20.

[0132] The bottle mouths at both ends of the filter bottle body 11 are respectively a first bottle mouth 111 and a second bottle mouth 112. The filter element 19 in the filter bottle is conducted through the second bottle mouth 112 with each water port on the filter element mounting seat 20. 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 the same as the rotation direction of screwing the filter bottle cap 12 onto the filter bottle body 11, in order to avoid the situation that the filter bottle cap 12 loosens first while the filter bottle body 11 and the filter element mounting seat 20 are not separated during the disassembly process. The limiting member 131 is further provided. Using the limiting member 131 as an intermediate element can not only avoid the occurrence of water leakage due to the premature loosening of the filter bottle cap 12, 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. There is a locking protrusion 31 on the whole machine housing 30. 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 confines the limiting member 131 in the locking position. As the filter bottle body 11 is gradually withdrawn 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 a 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, and the core body is disposed in the inner cylinder 191. The inner cylinder 191 is spaced apart from the filter bottle, and a handle 193 is provided at a portion of the inner cylinder 191 near 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 withdrawn from 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 in the filter bottle.

[0138] Further, as Figure 11 shown, the inner cylinder 191 is provided with a flushing and drainage hole 192. 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, 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. The flushing sewage is then discharged from the flushing and drainage 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 drainage port on the filter bottle body 11.

[0139] In the description of the present invention, it should be understood that 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. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It 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 should not be construed as a limitation to the present invention.

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

[0141] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. 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 and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

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

[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 embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0145] The above-described embodiments merely represent several implementation manners 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 fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A filter element locking unit, characterized in that: The filter bottle body comprises a filter bottle body, a filter bottle cover, and a stopper. The filter bottle cover can be screwed onto the first bottle opening of the filter bottle body to form a filter bottle for placing a filter element. One of the stopper and the filter bottle cover is provided with a convex tooth, and the other is provided with a tooth groove group. The tooth groove group includes at least two tooth grooves arranged in sequence in the circumferential direction of the filter bottle. When the filter bottle cover is screwed to block the first bottle opening, the convex tooth is inserted into the tooth groove, thereby preventing the filter bottle cover from loosening from the first bottle opening and opening the first bottle opening. The convex tooth is an isosceles triangle convex structure, and the vertex angle of the convex tooth is 55° to 65°. The height of the convex tooth is 3mm to 5mm. The limiting member is in sliding engagement with the filter bottle body, and the limiting member can move back and forth relative to the filter bottle body in a direction away from or close to the first bottle opening. When the limiting member slides to a locked position, the protruding teeth can be inserted into the tooth grooves. The tooth grooves are formed on the end surface of the filter bottle cover facing the limiting member. The filter bottle body is provided with a guide protrusion, the limiting member covers the outside of the guide protrusion, and the limiting member is provided with a first limiting rib and a second limiting rib arranged along the sliding direction on the surface facing the guide protrusion, the first limiting rib and the second limiting rib are arranged relative to each other and spaced apart to form a guide groove, and the guide protrusion is located in the guide groove; The limiting member is an annular structure, is sleeved outside the filter bottle body, and can slide along the axial direction of the filter bottle body.

2. The filter element locking unit according to claim 1, characterized in that: When the protruding teeth are located in the tooth grooves, the force acting on the filter bottle to cause the protruding teeth to elastically deform and disengage from the tooth grooves is F1, and the force acting on the filter bottle to loosen the filter body from the filter element mounting seat is F2, where F1 is greater than F2.

3. The filter element locking unit according to claim 1, characterized in that: When the limiting member moves to the locking position and the protruding tooth is located in the tooth groove, the gap between the guide protrusion and the first limiting rib and / or the second limiting rib is matched, and the width of the gap between the guide protrusion and the first limiting rib is smaller than the circumferential distance required for the protruding tooth to move out of the corresponding tooth groove group.

4. The filter element locking unit according to claim 1, characterized in that: A tooth groove group includes 2n+1 tooth grooves, where n is an integer, the tooth pitch of the tooth groove group is h, and when the convex tooth is located in the middle tooth groove in the tooth groove group, the guide protrusion and the first limiting rib and the second limiting rib are both clearance-fitted, and the gap widths between the guide protrusion and the first limiting rib and the second limiting rib are both d, 0.5h<d≤(n+0.5)h.

5. The filter element locking unit according to claim 1, characterized in that: The protruding tooth is located on the end surface of the limiting member close to the first bottle mouth, and the protruding tooth is located between the first limiting rib and the second limiting rib.

6. The filter element locking unit according to claim 1, characterized in that: There are multiple protruding teeth, which are arranged at intervals in the circumferential direction of the limiter; there are multiple tooth groove groups, which are arranged at intervals in the circumferential direction of the filter bottle cover; and the protruding teeth correspond to the tooth groove groups one by one.

7. The filter element locking unit according to claim 1 or 2, characterized in that: The limiting member is in sliding cooperation with the filter bottle body, and the sliding direction is a direction away from the first bottle mouth. When the limiting member moves out of the locking position, the protruding tooth exits the tooth groove.

8. A water purifier, characterized in that: The filter element locking unit comprises the filter element locking unit according to any one of claims 1 to 7, wherein a filter element is installed in the filter bottle.

Images