Detachable Filter Element Assembly and Water Purifier

Abstract

The present invention relates to a detachable filter element assembly and a water purifier, which includes a filter bottle for placing a filter element and a limiting member provided on the filter bottle. The filter bottle includes a filter bottle body having a first bottle mouth and a filter bottle cap that can be screwed onto the first bottle mouth. The limiting member can move back and forth along the axial direction of the filter bottle relative to the filter bottle. When the limiting member moves forward to the locking position, both the filter bottle body and the filter bottle cap are in limiting cooperation with the limiting member, avoiding water leakage during the disassembly process. When the limiting member moves out of the locking position, at least one of the filter bottle body and the filter bottle cap can move relative to the limiting member, so that the filter bottle cap can be unscrewed from the filter bottle body. Based on the fact that the limiting member switches states by moving back and forth in the axial direction of the filter bottle, during the operation process, when the detachable filter element assembly is removed from the water purifier, the limit in the moving direction of the limiting member can be released at the same time, and then the filter bottle cap can be unscrewed and removed from the filter bottle body. The entire disassembly process is smooth and fast, and the filter element replacement is convenient.

Description

Technical Field

[0001] The invention relates to the technical field of water purification equipment, in particular to a detachable filter element component and a water purifier. Background Art

[0002] With the development of the field of water purification equipment technology, the use of water purifiers has become more and more popular. The filtering capacity of the filter element in the water purifier will decrease after a period of use. In order to maintain a good filtering effect, the filter element needs to be replaced. The filter element is generally encapsulated in a filter bottle body to form a filter element assembly. The filter bottle body is connected to the housing of the water purifier, so that the filter element assembly is assembled in the water purifier. The methods of replacing the filter element include replacing the filter element assembly as a whole and replacing only the filter element while retaining the filter bottle body. The replacement method of only replacing the filter element and retaining the filter bottle body can effectively reduce the replacement cost, and the filter bottle body can be used continuously if it is not damaged.

[0003] For the replacement method of only replacing the filter element and retaining the filter bottle body, in order to remove the filter element from the filter bottle body, a detachable filter bottle cover is generally provided on the filter bottle body. After the filter bottle cover is removed from the filter bottle body, the filter element can be pulled out from the first bottle mouth and replaced with a new filter element. The filter bottle cover and the filter bottle body are generally connected by threads, and the filter bottle body and the whole machine housing are connected by a screw buckle. Since the force is all in the circumferential direction, in the process of disassembling and replacing the filter element, it is easy to loosen the filter bottle cover without disassembling the filter bottle body from the whole machine housing, resulting in water leakage during the process of disassembling and replacing the filter element. In order to avoid water leakage, the filter bottle cover can be restricted from rotating relative to the filter bottle body during the process of twisting the filter bottle body relative to the whole machine. However, to complete the process of disassembling and replacing the filter element, the filter bottle cover must be disassembled from the filter bottle body, and the two need to be able to rotate relative to each other. Therefore, how to avoid water leakage during disassembly and make the process of replacing the filter element more convenient has become an important aspect of improving the performance of the water purifier. Summary of the invention

[0004] In order to solve the problem that the process of disassembling and replacing the filter element is not convenient in order to avoid water leakage during the process of replacing the filter element, the present invention proposes a detachable filter element assembly and a water purifier, which can improve the convenience of replacing the filter element while avoiding water leakage during the process of disassembling and replacing the filter element.

[0005] A detachable filter element assembly, a filter bottle for placing a filter element, and a limiting member disposed on the filter bottle. The filter bottle includes a filter bottle body having a first bottle mouth and a filter bottle cap that can be screwed onto the first bottle mouth. The limiting member can move back and forth along the axial direction of the filter bottle relative to the filter bottle. When the limiting member moves forward to the locking position, both the filter bottle body and the filter bottle cap are in limiting cooperation with the limiting member, restricting the filter bottle cap from loosening and opening the first bottle mouth at the first bottle mouth. When the limiting member moves out of the locking position, at least one of the filter bottle body and the filter bottle cap can move relative to the limiting member, so that the filter bottle cap can be unscrewed from the filter bottle body.

[0006] The above solution provides a detachable filter element assembly. By using the limiting member to move back and forth on the filter bottle to switch states, when the detachable filter element assembly is not removed from the water purifier, the limiting member can be located at the locking position, and the filter bottle cap will not rotate in the opposite direction of the first direction relative to the filter bottle body, avoiding water leakage during the disassembly process. During the disassembly process, when the detachable filter element assembly is removed from the water purifier, the limiting member can move out of the locking position, so that the filter bottle cap can rotate in the opposite direction of the first direction relative to the filter bottle body, remove the filter bottle cap from the filter bottle body, and then replace the filter element in the filter bottle. Based on the fact that the limiting member switches states by moving on the filter bottle, and the moving direction is the direction away from or close to the first bottle mouth. Thus, during the operation, when the detachable filter element assembly is removed from the water purifier, the limit in the moving direction of the limiting member can be released at the same time, and then the filter bottle cap can be unscrewed and removed from the filter bottle body. The entire disassembly process is smooth and fast, and it is more convenient to replace the filter element.

[0007] In one embodiment, the limiting member is in sliding fit with the filter bottle body. The limiting member can move back and forth in the direction away from or close to the first bottle mouth relative to the filter bottle body. One of the limiting member and the filter bottle cap is provided with convex teeth, and the other is provided with tooth grooves. When the limiting member moves forward to the locking position, the convex teeth are inserted into the tooth grooves. When the limiting member moves out of the locking position, the convex teeth exit the tooth grooves.

[0008] In one embodiment, the part of the limiting member close to the filter bottle cap is provided with the convex teeth. The convex teeth are located on the end face of the limiting member close to the first bottle mouth. The part of the filter bottle cap facing the convex teeth is provided with tooth grooves. The tooth grooves are located on the end face of the filter bottle cap facing the convex teeth.

[0009] In one embodiment, the limiting member is of an annular structure. The limiting member is sleeved outside the filter bottle body, and the limiting member can slide axially along the filter bottle body. There are a plurality of convex teeth, and the plurality of convex teeth are arranged at intervals in the circumferential direction of the limiting member. There are a plurality of tooth grooves, and each convex tooth corresponds to a plurality of tooth grooves. The plurality of tooth grooves corresponding to the same convex tooth are connected in sequence to form a tooth groove group. There are a plurality of tooth groove groups, and the plurality of tooth groove groups are arranged at intervals in the circumferential direction of the filter bottle cap.

[0010] In one embodiment, convex teeth are provided at a position on the filter bottle cap close to the limiting member, and tooth grooves are provided at a position on the limiting member facing the convex teeth.

[0011] In one embodiment, a retaining projection is provided on a side surface of the limiting member facing the filter bottle body, and a guiding projection is provided on a side surface of the filter bottle body facing the limiting member. The guiding projection is limited to one side of the retaining projection close to the first bottle mouth.

[0012] In one embodiment, a retaining projection is provided on a side surface of the limiting member facing the filter bottle body, and an anti-falling projection is provided on a side surface of the filter bottle body facing the limiting member. The anti-falling projection is limited to one side of the retaining projection away from the first bottle mouth.

[0013] In one embodiment, guiding projections are provided outside the filter bottle body, the limiting member covers the guiding projections, and first limiting ribs and second limiting ribs are provided on a surface of the limiting member facing the guiding projections and are all arranged along the sliding direction. The first limiting rib and the second limiting rib are arranged opposite to each other at intervals to form a guiding groove, and the guiding projection is located in the guiding groove.

[0014] In one embodiment, when the convex tooth is inserted into the tooth groove, the convex tooth is located between the first limiting rib and the second limiting rib.

[0015] In one embodiment, a part of the limiting member between the first limiting rib and the second limiting rib is a snap buckle. There are gaps between the part of the limiting member provided with the first limiting rib and the snap buckle, and there are gaps between the part of the limiting member provided with the second limiting rib and the snap buckle. A retaining projection is provided on an inner side surface of the snap buckle, and the guiding projection is limited to one side of the retaining projection close to the first bottle mouth.

[0016] In one embodiment, an anti-falling projection is provided outside the filter bottle body, and the anti-falling projection is limited to one side of the retaining projection away from the first bottle mouth.

[0017] In one embodiment, the limiting member is slidably engaged with the filter bottle cap, and the sliding direction is the axial direction of the filter bottle cap. One of the limiting member and the filter bottle body is provided with convex teeth, and the other is provided with tooth grooves. When the limiting member moves forward to the locking position, the convex teeth are inserted into the tooth grooves. When the limiting member moves out of the locking position, the convex teeth are withdrawn from the tooth grooves.

[0018] In one embodiment, the limiting member is located on the outer side surface of the filter bottle cap, the convex teeth are located on the outer side surface of the filter bottle body, and the tooth grooves are provided at the part of the limiting member facing the convex teeth.

[0019] In one embodiment, the limiting member is of an annular structure, the limiting member is sleeved outside the filter bottle cap, the limiting member can slide along the axial direction of the filter bottle cap, there are a plurality of convex teeth, the plurality of convex teeth are arranged at intervals along the circumferential direction of the filter bottle body, there are a plurality of tooth grooves, each convex tooth corresponds to a plurality of tooth grooves, and the tooth grooves corresponding to the same convex tooth are sequentially connected to form a tooth groove group, and the plurality of tooth groove groups are arranged at intervals in the circumferential direction of the limiting member.

[0020] A water purifier includes the above-mentioned detachable filter element assembly.

[0021] The above solution provides a water purifier. By adopting the detachable filter element assembly described in any of the above embodiments, the convenience of replacing the filter element is improved while avoiding water leakage during the disassembly and replacement of the filter element.

[0022] In one embodiment, it further includes a filter element mounting seat. The filter bottle body is screwed onto the filter element mounting seat. The screwing direction of the filter bottle body is the same as the rotation direction of screwing the filter bottle cap onto the filter bottle body. The second bottle mouth of the filter bottle body communicates with the filter element mounting seat.

[0023] In one embodiment, it further includes an integral machine housing. The filter element mounting seat is connected to the integral machine housing. The integral machine housing is provided with a locking protrusion. When the detachable filter element assembly is assembled with the filter element mounting seat, the locking protrusion abuts and limits the limiting member at the locking position.

[0024] In one embodiment, a filter element is installed in the filter bottle. The filter element includes a core body and an inner cylinder. The core body is arranged in the inner cylinder. The inner cylinder is arranged at an interval from the filter bottle. A handle is provided at the part of the inner cylinder close to the first bottle mouth. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0026] 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.

[0027] Figure 1 Exploded view of the detachable filter element assembly described in this embodiment;

[0028] Figure 2 Schematic diagram of the disassembly principle of the detachable filter element assembly described in this embodiment;

[0029] Figure 3 Schematic diagram of the structure of the limit ring described in this embodiment;

[0030] Figure 4 Cross-sectional view of the detachable filter element assembly described in this embodiment;

[0031] Figure 5 For Figure 4 Partial enlarged view at position A in

[0032] Figure 6 For Figure 4 Cross-sectional view of the detachable filter element assembly shown from another perspective;

[0033] Figure 7 Cross-sectional view of the detachable filter element assembly after assembly with the whole machine housing described in this embodiment;

[0034] Figure 8 For Figure 7 Partial enlarged view at position B in

[0035] Figure 9 Schematic diagram of the structure of the filter cap described in this embodiment;

[0036] Figure 10 For Figure 9 Cross-sectional view of the filter cap shown;

[0037] Figure 11 Schematic diagram of the structure of the filter element described in this embodiment;

[0038] Figure 12 Cross-sectional view when the filter cap, end cap and limit ring are assembled together;

[0039] Figure 13 For Figure 12 Cross-sectional view of the end cap in

[0040] Explanation of reference numerals:

[0041] 10. Detachable 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. Limiting ring; 131. Limiting member; 132. Elastic buckle; 133. Guide groove; 134. First limiting rib; 135. Second limiting rib; 136. Anti-reverse 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

[0042] 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 in conjunction with 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.

[0043] As Figure 1 、 Figure 2 and Figure 3 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 at 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-fitted 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 communicated with each water port on the filter element mounting seat 20.

[0044] 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 at the first bottle mouth 111 of the filter bottle body 11 to form a filter bottle for placing the filter element 19.

[0045] 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 from 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.

[0046] Further, as Figure 2 shown, when the rotating direction of the filter bottle cap 12 when it is screwed onto the filter bottle body 11 is the same as the rotating 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.

[0047] 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 filter bottle cap 12 from being 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.

[0048] 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 limit fit with the limiting member 131, restricting the filter bottle cap 12 from loosening from the first bottle mouth 111 to open 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.

[0049] 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 from the first bottle mouth 111 to open 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.

[0050] Generally, after the detachable filter element assembly 10 is assembled on the water purifier, the end where the filter bottle cover 12 is located is exposed to the outside. For convenience, during the disassembly process, force is generally directly applied to the filter bottle cover 12 to provide a rotational force for the filter bottle. Therefore, it is more necessary to set the stopper 131 to avoid water leakage.

[0051] 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 cover 12 can rotate relative to the filter bottle body 11 and be removed from the first bottle opening 111 .

[0052] In other words, only when the filter bottle body 11 is removed from the filter element mounting seat 20 first, the filter bottle cover 12 can be twisted relative to the filter bottle body 11, thereby effectively avoiding water leakage. Moreover, since the limiter 131 switches the state by moving on the filter bottle, and the moving direction is away from or close to the first bottle mouth 111, during the operation, when the detachable filter element assembly 10 is removed from the water purifier, the limit of the limiter 131 in the moving direction can be released, and then the filter bottle cover 12 can be twisted and removed from the filter bottle body 11. The entire disassembly process is smooth and fast, and it is more convenient to replace the filter element 19.

[0053] Specifically, in one embodiment, Figure 7 and Figure 8 As shown, a locking protrusion 31 can be provided on the whole housing 30 of the water purifier, and the whole housing 30 is connected to the filter element mounting seat 20. When the detachable filter element assembly 10 and the filter element mounting seat 20 are assembled, the locking protrusion 31 abuts against the limit member 131 and limits it to the locking position, thereby limiting the filter bottle cover 12 from loosening from the first bottle mouth 111 and opening the first bottle mouth 111.

[0054] Alternatively, in another embodiment, a snap-on locking member can be provided on the entire housing 30 of the water purifier. After the detachable filter element assembly 10 and the filter element mounting seat 20 are assembled, the limit member 131 can be manually pushed to the locking position. When the limit member 131 reaches the locking position, the snap-on locking member on the entire housing 30 snaps into engagement with the limit member 131 to prevent the limit member 131 from moving out of the locking position.

[0055] Specifically, the limiting member 131 can be slidably matched with the filter bottle body 11, or the limiting member 131 can be slidably matched with the filter bottle cover 12, so that the limiting member 131 can move to the locking position, and can also exit the locking position under certain circumstances.

[0056] For example, in one embodiment, 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.

[0057] 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.

[0058] 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 realized by concave-convex fit. 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 can be 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 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 tooth 14 exits 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.

[0059] Further, the freedom degree of the limiting member 131 rotating 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 be loosened to open the first bottle mouth 111, but if the filter bottle cap 12 rotates by a small angle and the filter bottle cap 12 will not be loosened from the first bottle mouth 111, this small-angle rotation is allowed.

[0060] 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, a guiding protrusion 113 is provided on one of the limiting member 131 and the filter bottle body 11, and a guiding groove 133 is provided on the other. 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.

[0061] A filter bottle body unit provided by the above solution. Through the cooperation between the guiding protrusion 113 and the guiding groove 133 between the limiting member 131 and the filter bottle body 11, 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 engaged through the convex teeth 14 and the tooth grooves 16, the filter bottle cap 12 cannot be unscrewed and removed 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, a clearance fit is provided 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 assembly convenience and simultaneously reducing the requirement for manufacturing precision.

[0062] 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 to prevent the limiting member 131 from falling off the filter bottle body 11.

[0063] 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 3 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 to form the guiding groove 133, and the guiding protrusion 113 can slide axially along 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 axially on the filter bottle body 11 to the locking position or slide away from the locking position, switching between the two states.

[0064] The first limiting rib 134 and the second limiting rib 135 form 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 engaged together, improving the convenience of assembly and at the same time reducing the requirement for manufacturing precision.

[0065] Further, in one embodiment, as Figure 3 shown, a reverse-stop 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 reverse-stop protrusion 136 close to the first bottle mouth 111. Thereby preventing the limiting member 131 from slipping off from the end where the first bottle mouth 111 is located.

[0066] Further, in one embodiment, 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 reverse-stop protrusion 136 away from the first bottle mouth 111.

[0067] Further, in one embodiment, as Figure 4 shown, the reverse-stop 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 on both sides of the reverse-stop protrusion 136, the distance between the anti-falling protrusion 114 and the guiding protrusion 113 is greater than the thickness of the reverse-stop protrusion 136, enabling the reverse-stop protrusion 136 to move between them.

[0068] More specifically, in one embodiment, as Figure 1 and Figure 2As shown, the anti-falling protrusion 114 circumferentially surrounds the filter bottle body 11 for at least one week. To improve the reliability of anti-falling, regardless of how the anti-reverse protrusion 136 is distributed circumferentially on 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, preventing the limiting member 131 from falling from the end of the filter bottle body 11 away from the first bottle mouth 111.

[0069] Further, in one embodiment, as Figure 4 shown, when the convex tooth 14 is inserted into the tooth groove 16, the anti-reverse 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.

[0070] 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-reverse 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.

[0071] Specifically, in one embodiment, when the convex tooth 14 is inserted into the tooth groove 16, the difference between the distance between the anti-reverse protrusion 136 and the anti-falling protrusion 114 and the height of the convex tooth 14 is not less than 1 mm.

[0072] 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.

[0073] 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.

[0074] 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 10As shown, there are at least two of the 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 cooperate with the tooth groove group 15 correspondingly.

[0075] 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, preventing water leakage, allowing a certain assembly error, reducing the requirement for manufacturing precision, and at the same time improving the convenience of assembly.

[0076] In particular, when there are a plurality of the convex teeth 14, a plurality of the 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 a plurality of 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.

[0077] Further, in one embodiment, as Figure 3 shown, the convex teeth 14 are 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 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 can 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.

[0078] Optionally, the convex teeth 14 and the tooth grooves 16 can 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.

[0079] Furthermore, 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 along the axial direction of the filter bottle body 11. Thus, the limiting member 131 can be reliably assembled on the filter bottle body 11.

[0080] Further, as Figure 3 shown, there are a plurality of the convex teeth 14, and a plurality of the convex teeth 14 are arranged at intervals in the circumferential direction of the limiting member 131. As Figure 9As shown, there are multiple alveolar grooves 16, and each convex tooth 14 corresponds to multiple alveolar grooves 16. The multiple alveolar grooves 16 corresponding to the same convex tooth 14 are connected in sequence to form the alveolar groove group 15. There are multiple alveolar groove groups 15, and the multiple alveolar groove groups 15 are arranged at intervals in the circumferential direction of the filter bottle cap 12.

[0081] When the limiting member 131 and the filter bottle cap 12 are in limiting cooperation, the convex teeth 14 and the alveolar groove groups 15 can be in one-to-one correspondence, increasing the resistance to the rotation of the filter bottle cap 12 relative to the limiting member 131.

[0082] Moreover, based on the fact that each alveolar groove group 15 corresponding to each convex tooth 14 includes at least two alveolar grooves 16, during the assembly process, as long as each convex tooth 14 is inserted into one of the alveolar grooves 16 in the alveolar groove group 15 corresponding to it. A certain assembly error is allowed to ensure that all convex teeth 14 can be inserted into the respective alveolar groove groups 15 simultaneously, reducing the requirement for manufacturing precision and improving the convenience of assembly at the same time.

[0083] Furthermore, 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°.

[0084] 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 not convenient for alignment, and the guiding effect of the convex tooth 14 inserted into the alveolar 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 alveolar 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.

[0085] Furthermore, in one embodiment, when the convex tooth 14 is located in the alveolar groove 16, the acting force F1 that causes the convex tooth 14 to elastically deform and disengage from the alveolar 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 > 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 alveolar groove 16.

[0086] Based on this, in order to ensure that the resistance provided by the cooperation between the convex tooth 14 and the alveolar groove 16 is sufficient, in one embodiment, the height of the convex tooth 14 is set to 3 mm - 5 mm.

[0087] Furthermore, when the limiting member 131 moves to the locking position and the convex tooth 14 is located in the tooth groove 16, the clearance between the guide protrusion 113 and the first limiting rib 134 and / or the second limiting rib 135 is matched, so that the convex tooth 14 can be smoothly inserted into the corresponding tooth groove group 15 during the assembly process. However, the clearance between the guide 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 guiding function, and the convex tooth 14 will be separated from the corresponding tooth groove group 15.

[0088] Therefore, in one embodiment, the gap width between the guide protrusion 113 and the first limiting rib 134 is smaller than the circumferential distance that the convex tooth 14 needs to rotate 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, ensuring 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 cover 12 is not lost.

[0089] 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 an odd number. The tooth pitch of the tooth groove group 15 is h. When the convex tooth 14 is located in the middle tooth groove 16 in the tooth groove group 15, the guide protrusion 113 and the first limiting rib 134 and the second limiting rib 135 are both clearance-fitted, and the gap widths between the guide protrusion 113 and the first limiting rib 134 and the second limiting rib 135 are both d, and 0.5h<d≤(n+0.5)h.

[0090] 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 is large enough to ensure that the protruding tooth 14 is always opposite to the tooth groove set 15 without deviation.

[0091] For example, specifically, in one embodiment, Figure 9 and Figure 10 As shown, the tooth groove group 15 includes three tooth grooves 16. When the protruding tooth 14 is located in the middle tooth groove 16 in the tooth groove group 15, there is a clearance fit between the guide protrusion 113 and the first limiting rib 134 and the second limiting rib 135, and the gap widths between the guide protrusion 113 and the first limiting rib 134 and the second limiting rib 135 are both d, 0.5h<d≤1.5h.

[0092] Further, in one embodiment, if Figure 3As shown, the limiting member 131 is of an annular structure. There are a plurality of guiding protrusions 113, and the plurality of guiding protrusions 113 are arranged at intervals in the circumferential direction of the filter bottle body 11. There are a plurality of guiding grooves 133, and the plurality of 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 a plurality of such limiting groups, and the plurality of limiting groups are arranged at intervals in the circumferential direction of the limiting member 131.

[0093] Further, 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.

[0094] 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 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.

[0095] 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.

[0096] Further, 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 surface of the snap 132, and the snap 132 can be elastically deformed by being extruded outward.

[0097] During the assembly process, the limiting member 131 moves axially along the filter bottle body 11, so that the anti-retreat protrusion 136 moves from the side of the guiding protrusion 113 close to the first bottle mouth 111 to the other side. During this process, the snap 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 132 resets, so that the anti-retreat protrusion 136 is 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 the end of the first bottle mouth 111.

[0098] Particularly when the limiting member 131 is in 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 the filter bottle body 11, effectively avoiding the situation of the loss of the limiting member 131.

[0099] In one embodiment, as Figure 3 shown, a limiting ring 13 is provided, including the limiting member 131. The limiting member 131 is in 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 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. The inner side surface of the snap 132 is provided with an anti-retreat protrusion 136, and the snap 132 can be elastically deformed by being extruded outward.

[0100] During assembly, the limiting 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 pushing the limiting ring 13 along the axial direction of 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. The one-time alignment and assembly process completes the restriction in multiple directions, improving the convenience of assembly.

[0101] Furthermore, 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.

[0102] Specifically, in one embodiment, as Figure 3 shown, the notch penetrates through the first end surface of the limiting member 131. The anti-retreat protrusion 136 is located on the part of the snap 132 close to the first end surface. The end of the snap 132 for connecting to the limiting member 131 is the fixed end, and the end of the snap 132 away 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.

[0103] Furthermore, in one embodiment, as Figure 3 andFigure 4 As 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 to 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.

[0104] When Figure 3 the shown limiting ring 13 is assembled to Figure 4 the filter bottle body 11 of the shown angle-detachable filter element assembly 10, the first end face is downward and the second end face is upward.

[0105] 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-return 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-return 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. Arranging the convex teeth 14 or tooth grooves 16 adjacent to the snap 132, the first limiting rib 134 and the second limiting rib 135 can effectively improve the assembly accuracy.

[0106] 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 to 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 is in limiting fit with the filter bottle body 11, so that the filter bottle body 11 cannot rotate relative to the limiting member 131, and further the filter bottle cap 12 cannot loosen from the first bottle mouth 111.

[0107] 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 restrict 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 together from the filter bottle body 11, and then the filter element 19 in the filter bottle body 11 can be taken out and replaced.

[0108] 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 position on the limiting member 131 facing the convex tooth 14.

[0109] 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 part of the limiting member 131 provided with the tooth groove 16 is sleeved outside the part of the filter bottle body 11 provided with the convex tooth 14, and the convex tooth 14 is located in the tooth groove 16.

[0110] When the convex tooth 14 is an isosceles triangle convex structure, the tip of the convex tooth 14 is the vertex angle 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.

[0111] 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.

[0112] 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. 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, each convex tooth 14 corresponds to multiple tooth grooves 16, and 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.

[0113] Similar to the solution of slidably disposing 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 in the corresponding tooth groove group 15.

[0114] 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 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.

[0115] During the disassembly process, when the limit between the limit 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.

[0116] 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.

[0117] 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, so that the end cap 17 is inserted 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.

[0118] Specifically, as Figure 4 、 Figure 5 and Figure 12As shown, in one embodiment, an installation body 121 is provided on the inner side 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 face 173, and the end face of the end cap 17 facing the inside of the filter bottle body 11 is the fourth end face 174. As Figure 13 shown, the end cap 17 is provided with an installation hole 175, and the installation hole 175 penetrates through the third end face 173 and the fourth end face 174 of the end cap 17. The installation body 121 is inserted into the installation hole 175, and the end cap 17 can rotate relative to the installation body 121. As Figure 4 and Figure 5 shown, one end of the connecting member 18 is connected to the installation 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 on 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 with the filter bottle cap 12, but the end cap 17 will move axially with the filter bottle cap 12 on the filter bottle cap 12.

[0119] Specifically, as Figure 5 shown, the connecting member 18 is a screw, the screw is arranged in the installation body 121, and the nut of the screw is in limit fit with the end cap 17, restricting the end cap 17 from moving axially relative to the connecting member 18 on the filter bottle cap 12, but the nut is spaced from the side wall of the installation hole 175, so that the end cap 17 will not rotate with the filter bottle cap 12.

[0120] 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.

[0121] Further, as Figure 5 and Figure 12 shown, in one embodiment, one end of the connecting member 18 for limit fit with the end cap 17 is a limit end 181, and a limit protrusion 176 is provided on the inner wall of the installation hole 175. The limit protrusion 176 is limited on the 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 on the filter bottle cap 12.

[0122] 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 the side of the limit protrusion 176 away from the third end face 173.

[0123] Specifically, as Figure 5 shown, 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.

[0124] 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.

[0125] 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, and the abutting protrusion 177 abuts against the limiting end 181 to reduce the frictional force between the connecting member 18 and the end cover 17 when the filter bottle cap 12 rotates.

[0126] Specifically, as Figure 13 shown, there are multiple abutting protrusions 177, and the multiple abutting protrusions 177 are arranged at intervals in the circumferential direction of the mounting hole 175.

[0127] 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 frictional force indirectly applied to the filter bottle cap 12 by the end cover 17 when rotating the filter bottle cap 12.

[0128] 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.

[0129] 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 the end of the mounting body 121 away from the bottom wall of the filter bottle cap 12.

[0130] 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 10As shown, the mounting body 121 can be axially divided into a first section and a second section on 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 greater than that of the second section, and a step is formed 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 to the side of the second sealing ring 172 close to the third end face 173.

[0131] Thus, by combining 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.

[0132] 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 to prevent the end cap 17 from being deformed and fractured under pressure. Specifically, the support member 122 can be a support rib.

[0133] 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 need to screw the filter bottle cap 12 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 improving the convenience of assembly at the same time.

[0134] 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 reducing the requirement for manufacturing precision at the same time.

[0135] Further, in one embodiment, a water purifier is provided, including the detachable filter element assembly 10 described in any of the above embodiments.

[0136] By adopting the detachable filter element assembly 10 described in any of the above embodiments, while avoiding water leakage during the disassembly and replacement of the filter element 19, the convenience of replacing the filter element 19 is improved.

[0137] Further, in one embodiment, as Figure 2As 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 communicates with the filter element mounting seat 20.

[0138] 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 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 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 situation of the filter bottle cap 12 loosening and leaking water first, but also enable the filter bottle cap 12 to be smoothly removed after the filter bottle body 11 and the filter element mounting seat 20 are separated.

[0139] Further, in one embodiment, as Figure 7 and Figure 8 shown, the water purifier further includes an integral machine housing 30. The filter element mounting seat 20 is connected to the integral machine housing 30. The integral 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.

[0140] 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.

[0141] 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 integral 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.

[0142] Further, in one embodiment, a filter element 19 is installed in the filter bottle, as Figure 11As shown, the filter element 19 includes a core body and an inner cylinder 191, and the core body is arranged in the inner cylinder 191. The inner cylinder 191 is spaced from the filter bottle, and a handle 193 is provided at a position on the inner cylinder 191 close to the first bottle mouth 111.

[0143] 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.

[0144] Furthermore, as Figure 11 shown, a flushing and drainage 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, 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 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.

[0145] 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 to the present invention.

[0146] 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 specifying 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.

[0147] In the present invention, unless otherwise clearly specified or limited, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral one; 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 connection of two components or the interaction relationship between two components, 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.

[0148] In the present invention, unless otherwise clearly specified or limited, 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.

[0149] 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", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0150] 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 falling within the scope described in this specification.

[0151] The above-described embodiments merely represent several implementation manners of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting 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 detachable filter element assembly, characterized in that, Comprising a filter bottle for placing a filter element and a limiting member provided on the filter bottle, the filter bottle includes a filter bottle body having a first bottle mouth and a filter bottle cap that can be screwed onto the first bottle mouth. The limiting member can move back and forth along the axial direction of the filter bottle relative to the filter bottle. When the limiting member moves forward to the locking position, both the filter bottle body and the filter bottle cap are in limiting cooperation with the limiting member, restricting the filter bottle cap from loosening and opening the first bottle mouth at the first bottle mouth. When the limiting member moves out of the locking position, at least one of the filter bottle body and the filter bottle cap can move relative to the limiting member, so that the filter bottle cap can be unscrewed from the filter bottle body; the filter bottle body is further provided with a second bottle mouth, and the second bottle mouth can be screwed onto the filter element mounting seat of the water purifier; the rotation direction when the filter bottle cap is screwed onto the filter bottle body is the same as the rotation direction when the filter bottle body is screwed onto the filter element mounting seat. The limiting member is in sliding cooperation 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. One of the limiting member and the filter bottle cap is provided with convex teeth, and the other is provided with a tooth groove. When the limiting member moves forward to the locking position, the convex teeth are inserted into the tooth groove. When the limiting member moves out of the locking position, the convex teeth exit the tooth groove. The limiting member is of an annular structure, the limiting member is sleeved outside the filter bottle body, and the limiting member can slide along the axial direction of the filter bottle body. A guiding protrusion is provided outside the filter bottle body, the limiting member covers the guiding protrusion, and the surface of the limiting member facing the guiding protrusion is provided with a first limiting rib and a second limiting rib both arranged along the sliding direction. The first limiting rib and the second limiting rib are spaced apart relatively to form a guiding groove, and the guiding protrusion is located in the guiding groove.

2. The detachable filter element assembly according to claim 1, wherein The convex teeth are provided at a position of the limiting member close to the filter bottle cap, the convex teeth are located on the end face of the limiting member close to the first bottle mouth, and the tooth groove is provided at a position of the filter bottle cap facing the convex teeth, and the tooth groove is located on the end face of the filter bottle cap facing the convex teeth.

3. The detachable filter element assembly according to claim 2, wherein 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 grooves, and each convex tooth corresponds to multiple tooth grooves. The multiple tooth grooves corresponding to the same convex tooth are connected in sequence to form a tooth groove group. 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.

4. The detachable filter element assembly according to claim 1, characterized in that, The convex teeth are provided at a position of the filter bottle cap close to the limiting member, and the tooth groove is provided at a position of the limiting member facing the convex teeth.

5. The detachable filter element assembly according to any one of claims 1 to 4, characterized in that A retaining protrusion is provided on the side surface of the limiting member facing the filter bottle body, and a guiding protrusion is provided on the side surface of the filter bottle body facing the limiting member. The guiding protrusion is limited to the side of the retaining protrusion close to the first bottle mouth.

6. The detachable filter element assembly according to any one of claims 1 to 4, characterized in that A retaining protrusion is provided on the side surface of the limiting member facing the filter bottle body, and a falling prevention protrusion is provided on the side surface of the filter bottle body facing the limiting member. The falling prevention protrusion is limited to the side of the retaining protrusion away from the first bottle mouth.

7. The detachable filter element assembly according to claim 1, characterized in that, When the convex tooth is inserted into the tooth groove, the convex tooth is located between the first limiting rib and the second limiting rib.

8. The detachable filter element assembly according to claim 1, wherein, The part of the limiting member between the first limiting rib and the second limiting rib is a snap buckle. There is a notch between the part of the limiting member where the first limiting rib is provided and the snap buckle, and there is a notch between the part of the limiting member where the second limiting rib is provided and the snap buckle. A retaining projection is provided on the inner side surface of the snap buckle, and the guiding projection is limited to the side close to the first bottle mouth of the retaining projection.

9. The detachable filter element assembly according to claim 8, wherein, An anti-falling projection is provided outside the filter bottle body, and the anti-falling projection is limited to the side away from the first bottle mouth of the retaining projection.

10. A water purifier, characterized in that, It includes the detachable filter element assembly according to any one of claims 1 to 9.

11. The water purifier according to claim 10, characterized in that, It further includes a filter element mounting seat. The filter bottle body is screwed onto the filter element mounting seat, and the second bottle mouth of the filter bottle body communicates with the filter element mounting seat.

12. The water purifier according to claim 11, wherein, It further includes a whole machine housing. The filter element mounting seat is connected to the whole machine housing. A locking projection is provided on the whole machine housing. When the detachable filter element assembly is assembled with the filter element mounting seat, the locking projection abuts and limits the limiting member at the locking position.

13. The water purifier according to any one of claims 10 to 12, characterized in that, A filter element is installed in the filter bottle. The filter element includes a core body and an inner cylinder. The core body is arranged in the inner cylinder. The inner cylinder is arranged at an interval from the filter bottle. A handle is provided at a position on the inner cylinder close to the first bottle mouth.

Images