Filter bottle body unit, detachable filter element assembly and water purifier

Abstract

The present invention relates to a filter bottle body unit, a detachable filter element assembly and a water purifier. The filter bottle body unit includes a filter bottle body and a limiting ring. The limiting ring is sleeved outside the filter bottle body and can move axially along the filter bottle body. One of the filter bottle body and the limiting ring is provided with a guiding protrusion, and the other is provided with a guiding groove arranged axially along the filter bottle body. The guiding groove includes a guiding section and a limiting section that are communicated with each other. The width of the guiding section is greater than the width of the limiting section. When the limiting ring moves to the locking position, the guiding protrusion enters from the guiding section into the limiting section, and the limiting ring can be in limiting cooperation with the filter bottle cap to limit the movement of the filter bottle cap relative to the limiting ring so that the filter bottle cap is loosened from the filter bottle body. During the process of moving the limiting ring, by setting the guiding groove in the form including the guiding section and the limiting section, the guiding section with a larger width can play a guiding role for the guiding protrusion, so that the guiding protrusion can quickly and smoothly enter the limiting section, improving the convenience of assembly.

Description

Technical Field

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

[0002] With the continuous development of the water purifier industry, water purifiers with replaceable filter cartridges have become widely used due to their cost-saving and long service life. During the filter cartridge replacement process, a removable filter cap is typically provided on the filter body to remove the filter cartridge from the filter bottle. Once the cap is removed from the filter bottle body, the filter cartridge can be pulled out from the first bottle opening and replaced with a new one. The cap and the body are typically connected by threads, while the body and the housing are connected by a screw-on connection. Because the forces acting are circumferential, during the process of removing and replacing the filter cartridge, it is easy for the filter bottle to be unscrewed while the cap is still attached to the housing, leading to water leakage during the process. To prevent water leakage, an intermediate element can be provided between the cap and the body to limit relative rotation between the two. However, the addition of an intermediate element makes the assembly process less convenient. Summary of the Invention

[0003] In order to solve the problem of inconvenient assembly, the present invention proposes a filter bottle unit, a detachable filter element assembly and a water purifier, which can improve the convenience of assembly.

[0004] A filter bottle unit comprises a filter bottle body and a limiting ring, the limiting ring being sleeved on the filter bottle body, the limiting ring being capable of moving along the axial direction of the filter bottle body, one of the filter bottle body and the limiting ring being provided with a guide protrusion, and the other being provided with a guide groove arranged along the axial direction of the filter bottle body, the inner side surface of the limiting ring being provided with a guide groove arranged along the axial direction of the filter bottle body, the guide groove comprising a guide section and a limiting section that are interconnected, the width of the guide section being greater than the width of the limiting section, when the limiting ring moves to a locking position, the guide protrusion enters the limiting section from the guide section, the limiting ring being capable of cooperating with the filter bottle cover to limit the movement of the filter bottle cover relative to the limiting ring until the filter bottle cover is loosened from the filter bottle body.

[0005] The above solution provides a filter bottle body unit. The included limit ring is sleeved outside the filter bottle body. During the assembly process, the limit ring moves axially along the filter bottle body so that the limit ring reaches the locking position, facilitating the restriction of the movement of the filter bottle cap relative to the filter bottle body to loosen. Specifically, when the limit ring moves to the locking position, the guiding protrusion is located in the limiting section. Further, the limit ring cannot rotate relative to the filter bottle body. At this time, the filter bottle cap assembled on the filter bottle body is in limit cooperation with the limit ring, thereby indirectly restricting the loosening of the filter bottle cap relative to the filter bottle body through the limit ring. And during the process of moving the limit ring, by setting the guiding groove in a form including the guiding section and the limiting section, the guiding section with a larger width can guide the guiding protrusion, so that the guiding protrusion can quickly and smoothly enter the limiting section, improving the convenience of assembly.

[0006] In one embodiment, the width of the guiding section gradually decreases in the direction close to the limiting section.

[0007] In one embodiment, both side walls of the guiding section are arc surfaces convex towards the inside of the guiding section.

[0008] In one embodiment, reinforcing limit ribs are provided at the positions of both side walls of the limiting section, and the reinforcing limit ribs are arranged along the axial direction of the filter bottle body.

[0009] In one embodiment, both the guiding protrusion and the guiding groove are multiple. The multiple guiding protrusions are arranged at intervals along the circumferential direction of the filter bottle body, and the multiple guiding grooves are arranged at intervals along the circumferential direction of the limit ring. The guiding protrusions and the guiding grooves correspond to each other one by one.

[0010] In one embodiment, a limiting protrusion is provided on the limit ring, and a backstop protrusion is provided on the outer side surface of the filter bottle body. When the limit ring moves to the locking position, the backstop protrusion is limited on the side of the limiting protrusion away from the filter bottle cap.

[0011] In one embodiment, the backstop protrusion includes an annular protrusion surrounding the outer side surface of the filter bottle body, and the limiting protrusions are multiple. The multiple limiting protrusions are arranged at intervals in the circumferential direction of the limit ring.

[0012] In one embodiment, the guiding protrusion is located on the filter bottle body, the guiding groove is located on the inner side surface of the limit ring, the guiding protrusion is connected to the backstop protrusion, the guiding protrusion is located on the side of the backstop protrusion away from the filter bottle cap, and the limiting protrusion is located at a position on the limit ring close to the filter bottle cap.

[0013] In one embodiment, the guiding protrusion is located on the filter bottle body, the guiding groove is located on the inner side surface of the limiting ring, the limiting protrusion is connected to the end surface of the limiting ring facing the filter bottle cap, the limiting protrusion extends into the space surrounded by the limiting ring, the guiding groove penetrates through both end surfaces of the limiting ring, and the limiting protrusions are provided on both sides at the entrance of the guiding section.

[0014] In one embodiment, the end surface of the limiting protrusion facing the filter bottle cap is provided with convex teeth.

[0015] In one embodiment, an external thread is provided on the outer side surface of the filter bottle body, and the external thread is limited to the side of the limiting protrusion close to the filter bottle cap.

[0016] A detachable filter element assembly includes a filter bottle cap and the filter bottle body unit described in any one of the above, the filter bottle cap is detachably connected to the filter bottle body, when the limiting ring moves to the locking position, the filter bottle cap can be in limiting cooperation with the limiting ring, the filter bottle cap seals the first bottle mouth of the filter bottle body, and when the limiting ring moves out of the locking position, the filter bottle cap can be loosened from the first bottle mouth of the filter bottle body.

[0017] The above solution provides a detachable filter element assembly. By adopting the filter bottle body described in any one of the above embodiments, the guiding protrusion can quickly and accurately enter the limiting section during the assembly process, thereby restricting the movement of the filter bottle cap relative to the filter bottle body and improving the convenience of assembly.

[0018] In one embodiment, a tooth groove is provided at the open end of the filter bottle cap for limiting cooperation with the limiting ring located at the locking position.

[0019] In one embodiment, there are a plurality of the tooth grooves, and the plurality of tooth grooves are distributed in a circle along the circumferential direction of the filter bottle cap.

[0020] A water purifier includes the detachable filter element assembly described in any one of the above.

[0021] The above solution provides a water purifier. By adopting the detachable filter element assembly described in any one of the above embodiments, the convenience during assembly is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] 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.

[0024] Figure 1 It is a schematic structural diagram of the detachable filter element assembly described in this embodiment;

[0025] Figure 2 is Figure 1 an exploded view of the detachable filter element assembly shown;

[0026] Figure 3 is Figure 1 a schematic structural diagram of the filter bottle body in the detachable filter element assembly shown;

[0027] Figure 4 is Figure 1 a schematic structural diagram of the limit ring in the detachable filter element assembly shown;

[0028] Figure 5 is Figure 1 a schematic structural diagram of the filter cap in the detachable filter element assembly shown.

[0029] Explanation of reference numerals:

[0030] 10. Detachable filter element assembly; 11. Filter bottle body; 111. Guide protrusion; 112. Anti-return protrusion; 113. External thread; 114. First bottle mouth; 115. Second bottle mouth; 12. Limit ring; 121. Guide groove; 1211. Guide section; 1212. Limit section; 13. Reinforcing limit rib; 14. Limit protrusion; 15. Convex tooth; 16. Filter cap; 161. Tooth groove. Detailed implementation manners

[0031] 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 in conjunction with the 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. 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.

[0032] Such as Figure 1 and Figure 2As shown, in one embodiment, a filter bottle body unit is provided, including a filter bottle body 11. A filter bottle cap 16 can be screwed onto the first bottle mouth 114 of the filter bottle body 11 to form a filter bottle, thereby sealing the first bottle mouth 114. The second bottle mouth 115 of the filter bottle body 11 can be snap-fitted onto a filter element mounting seat (not shown in the figure) of a water purifier, so that the filter element in the filter bottle body 11 is correspondingly communicated with each water port on the filter element mounting seat.

[0033] When the filter element 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, so that the water flow path in the water purifier is separated from the filter bottle body 11. Then, the filter bottle cap 16 can be removed from the filter bottle body 11, the first bottle mouth 114 can be opened, and the filter element can be taken out of the filter bottle for replacement. Since the filter bottle body 11 has been separated from the filter element mounting seat when the filter bottle cap 16 is loosened, no water leakage will occur when the first bottle mouth 114 is opened.

[0034] Furthermore, when the rotation direction when the filter bottle cap 16 is screwed onto the filter bottle body 11 is the same as the rotation direction when the filter bottle body 11 is snap-fitted onto the filter element mounting seat, during the process of replacing the filter element, the rotational force acting on the filter bottle may loosen the filter bottle cap 16 from the filter bottle body 11 before the filter bottle body 11 is removed from the filter element mounting seat, resulting in water leakage.

[0035] Based on this, as Figure 1 and Figure 2 shown, the filter bottle body unit further includes a limiting ring 12. The limiting ring 12 is sleeved outside the filter bottle body 11, and the limiting ring 12 can move axially along the filter bottle body 11. One of the filter bottle body 11 and the limiting ring 12 is provided with a guiding protrusion 111, and the other is provided with a guiding groove 121 arranged axially along the filter bottle body 11. Specifically, as Figure 2 and Figure 3 shown, in some embodiments, the guiding protrusion 111 is provided outside the filter bottle body 11. As Figure 4 shown, the inner side surface of the limiting ring 12 is provided with a guiding groove 121 arranged axially along the filter bottle body 11. The guiding groove 121 includes a guiding section 1211 and a limiting section 1212 that are communicated with each other. The width of the guiding section 1211 is greater than the width of the limiting section 1212. When the limiting ring 12 moves to the locking position, the guiding protrusion 111 enters the limiting section 1212 from the guiding section 1211, and the limiting ring 12 can be in limiting cooperation with the filter bottle cap 16 to limit the movement of the filter bottle cap 16 relative to the limiting ring 12 until the filter bottle cap 16 is loosened from the filter bottle body 11.

[0036] A filter bottle body unit provided by the above solution includes a limiting ring 12 sleeved outside the filter bottle body 11. During the assembly process, the limiting ring 12 moves axially along the filter bottle body 11 so that the limiting ring 12 reaches the locking position, which is convenient for restricting the movement of the filter bottle cap 16 relative to the filter bottle body 11 to loosen. Specifically, when the limiting ring 12 moves to the locking position, the guiding protrusion 111 is located in the limiting section 1212. Further, the limiting ring 12 cannot rotate relative to the filter bottle body 11. At this time, the filter bottle cap 16 assembled on the filter bottle body 11 is in limiting cooperation with the limiting ring 12, so as to indirectly restrict the loosening of the filter bottle cap 16 relative to the filter bottle body 11 through the limiting ring 12. During the process of moving the limiting ring 12, by setting the guiding groove 121 to include the guiding section 1211 and the limiting section 1212, the guiding section 1211 with a larger width can guide the guiding protrusion 111, so that the guiding protrusion 111 can quickly and smoothly enter the limiting section 1212, improving the convenience of assembly.

[0037] Further specifically, as Figure 4 shown, in one embodiment, the width of the guiding section 1211 gradually decreases in the direction close to the limiting section 1212. Thus, when the limiting ring 12 moves axially along the filter bottle body 11, the guiding protrusion 111 first enters the guiding groove 121 from the entrance with the largest width of the guiding section 1211, and then gradually moves under the guiding action of the guiding section 1211, and finally accurately and quickly enters the limiting section 1212.

[0038] Assume that one end of the filter bottle body 11 assembled with the filter element mounting seat is the head end, and the end assembled with the filter bottle cap 16 is the tail end. Then during the assembly process, the limiting ring 12 is sleeved on the filter bottle body 11 from the head end of the filter bottle body 11, and then moves from the head end to the tail end until the guiding protrusion 111 slides into the limiting section 1212.

[0039] Further specifically, in one embodiment, as Figure 4 shown, both side walls of the guiding section 1211 are arc surfaces convex toward the inside of the guiding section 1211.

[0040] Optionally, both side walls of the guiding section 1211 can also be two planes that gradually approach each other in the direction close to the limiting section 1212.

[0041] Further, based on the main function of the limiting section 1212 is to restrict the rotation of the guiding protrusion 111 relative to the limiting section 1212 in the circumferential direction of the filter bottle body 11. Therefore, in one embodiment, as Figure 4As shown, reinforcing limit ribs 13 are provided at the positions of both side walls of the limit section 1212, and the reinforcing limit ribs 13 are arranged along the axial direction of the filter bottle body 11. The arrangement of the reinforcing limit ribs 13 can increase the reliability of limiting the guiding protrusion 111, and avoid the situation that the guiding protrusion 111 disengages from the limit section 1212 when the rotational force is large.

[0042] Further, as Figure 2 and Figure 3 shown, the guiding protrusion 111 is a rectangular block structure, and the long side of the guiding protrusion 111 is arranged along the length direction of the reinforcing limit rib 13. The width of the guiding protrusion 111 matches the width of the limit section 1212. Specifically, the width of the guiding protrusion 111 can be slightly smaller than the width of the limit section 1212, so that during the assembly process, the limit ring 12 can rotate by a certain angle Δd relative to the filter bottle body 11, so that the limit ring 12 can be in limit cooperation with the filter bottle cap 16.

[0043] Assume that the filter bottle cap 16 and the limit ring 12 are in concave-convex fit. The rotation of the limit ring 12 relative to the filter bottle body 11 within a certain allowable angle Δd can effectively improve the convenience of the assembly between the limit ring 12 and the filter bottle body 11, and at the same time reduce the requirement for manufacturing precision. However, the size of the angle Δd by which the limit ring 12 can rotate relative to the filter bottle body 11 should be ensured that when the filter bottle cap 16 drives the limit ring 12 to rotate by the angle Δd, the filter bottle cap 16 will not move relative to the filter bottle body 11 to become loose. In other words, the filter bottle cap 16 can still block the bottle mouth of the filter bottle body 11 to avoid water leakage.

[0044] Further, as Figure 3 shown, the guiding protrusion 111 is located on the outer side surface of the filter bottle body 11. The end surface of the guiding protrusion 111 facing the head end of the filter bottle body 11 is an outwardly convex arc-shaped guiding surface, which plays a guiding role and improves the convenience of assembly.

[0045] Furthermore, in one embodiment, as Figure 3 and Figure 4 shown, there are multiple guiding protrusions 111 and multiple guiding grooves 121. The multiple guiding protrusions 111 are arranged at intervals along the circumferential direction of the filter bottle body 11, the multiple guiding grooves 121 are arranged at intervals along the circumferential direction of the limit ring 12, and the guiding protrusions 111 and the guiding grooves 121 correspond to each other one by one.

[0046] The arrangement of multiple guiding protrusions 111 and guiding grooves 121 makes the circumferential limit between the limiting ring 12 and the filter bottle body 11 more reliable. However, to ensure that all the multiple guiding protrusions 111 and multiple guiding grooves 121 are properly engaged, higher requirements are imposed on the assembly accuracy and assembly convenience. At this time, the necessity of setting the guiding groove 121 in the form including the guiding section 1211 becomes more obvious.

[0047] Further, in one embodiment, as Figure 4 shown, a limiting protrusion 14 is provided on the limiting ring 12. As Figure 2 and Figure 3 shown, a retaining protrusion 112 is provided on the outer side surface of the filter bottle body 11. When the limiting ring 12 moves to the locking position, the retaining protrusion 112 is limited to the side of the limiting protrusion 14 away from the filter bottle cap 16.

[0048] Thus, after the limiting ring 12 is assembled onto the filter bottle body 11, the retaining protrusion 112 can prevent the limiting ring 12 from falling off the head end of the filter bottle body 11.

[0049] Further, as Figure 2 and Figure 3 shown, when the filter bottle body 11 and the filter bottle cap 16 are threadedly connected, an external thread 113 can be provided on the outer side surface of the filter bottle body 11. Then, the protruding external thread 113 can be limited to the end of the limiting protrusion 14 close to the filter bottle cap 16, thereby preventing the limiting ring 12 from falling off the tail end of the filter bottle body 11.

[0050] It should be noted that under the limiting action of the external thread 113 and the retaining protrusion 112, it can be ensured that the limiting ring 12 is always sleeved on the filter bottle body 11, but the limiting ring 12 can still move axially on the filter bottle body 11. In other words, the distance between the external thread 113 and the retaining protrusion 112 is greater than the thickness of the limiting protrusion 14, and the limiting protrusion 14 can move between the external thread 113 and the retaining protrusion 112.

[0051] When the filter bottle cap 16 is assembled onto the filter bottle body 11, in order to keep the limiting ring 12 and the filter bottle cap 16 in a limiting fit, the whole machine housing of the water purifier can be utilized. Specifically, a locking protrusion can be provided on the whole machine housing (not shown in the figure) of the water purifier. When the filter bottle body unit and the filter element mounting seat are assembled, the locking protrusion on the whole machine housing connected to the filter element mounting seat can abut and limit the limiting ring 12 at the locking position, restricting the filter bottle cap 16 from loosening from the filter bottle body 11.

[0052] Further specifically, when the filter bottle cap 16 and the limiting ring 12 are in concave-convex fit, and the way to release the concave-convex fit is that the limiting ring 12 and the filter bottle cap 16 move away from each other in the axial direction of the filter bottle body 11, the locking protrusion can abut against the side of the limiting ring 12 away from the filter bottle cap 16 to prevent the limiting ring 12 from moving away from the filter bottle cap 16, thereby ensuring the reliability of the limiting fit between the limiting ring 12 and the filter bottle cap 16.

[0053] Further, in one embodiment, as Figure 2 and Figure 3 shown, the anti-retreat protrusion 112 includes an annular protrusion surrounding the outer side surface of the filter bottle body 11. As Figure 4 shown, there are multiple limiting protrusions 14, and the multiple limiting protrusions 14 are arranged at intervals in the circumferential direction of the limiting ring 12. It effectively prevents the limiting ring 12 from falling off from the head end of the filter bottle body 11.

[0054] Further, in one embodiment, the guiding protrusion 111 is located on the filter bottle body 11, and the guiding groove 121 is located on the inner side surface of the limiting ring 12. The guiding protrusion 111 is connected to the anti-retreat protrusion 112, and the guiding protrusion 111 is located on the side of the anti-retreat protrusion 112 away from the filter bottle cap 16. The limiting protrusion 14 is located at a position on the limiting ring 12 close to the filter bottle cap 16.

[0055] When the limiting protrusion 14 passes over the anti-retreat protrusion 112 and reaches the side of the anti-retreat protrusion 112 close to the filter bottle cap 16, the guiding protrusion 111 is just located in the guiding groove 121.

[0056] Further specifically, in one embodiment, as Figure 4 shown, the guiding protrusion 111 is located on the filter bottle body 11, and the guiding groove 121 is located on the inner side surface of the limiting ring 12. The limiting protrusion 14 is connected to the end face of the limiting ring 12 facing the filter bottle cap 16, and the limiting protrusion 14 extends into the space surrounded by the limiting ring 12. The guiding groove 121 penetrates through the two end faces of the limiting ring 12, and the limiting protrusions 14 are provided on both sides of the entrance of the guiding section 1211. As Figure 4 shown, when there are multiple guiding grooves 121, both ends of the anti-retreat protrusion 112 are connected to the side walls of the adjacent two guiding grooves 121.

[0057] Thus, the limiting protrusion 14 can not only cooperate with the anti-retreat protrusion 112 to prevent dropping, but also play a role in guiding and limiting the guiding protrusion 111, so that the guiding protrusion 111 can enter the guiding section 1211 more accurately. Specifically, based on the fact that the limiting protrusions 14 are provided on both sides of the outlet of the guiding section 1211, and the limiting protrusions 14 extend into the space surrounded by the limiting ring 12, the guiding protrusion 111 can only slide between the two limiting protrusions 14 and enter the guiding section 1211.

[0058] Further, in one embodiment, as Figure 4 shown, the end face of the limiting protrusion 14 facing the filter bottle cap 16 is provided with convex teeth 15. The convex teeth 15 are used to cooperate with the tooth grooves 161 on the filter bottle cap 16, so as to realize the limiting cooperation between the limiting ring 12 and the filter bottle cap 16. Moreover, based on the fact that the limiting protrusion 14 is located on the end face of the limiting ring 12 facing the filter bottle cap 16 and the limiting protrusion 14 extends into the space surrounded by the limiting ring 12, the end face area of the limiting protrusion 14 facing the filter bottle cap 16 is relatively large. On the one hand, it is convenient to arrange the convex teeth 15, and on the other hand, it is also convenient for the surface near the convex teeth 15 to fit with the end face of the filter bottle cap 16 to ensure that the convex teeth 15 can be limited in the tooth grooves 161.

[0059] Furthermore, as Figure 1 and Figure 2 shown, in another embodiment, a detachable filter element assembly 10 is provided, which includes a filter bottle cap 16 and the filter bottle body unit described in any one of the above. The filter bottle cap 16 is detachably connected to the filter bottle body 11. When the limiting ring 12 moves to the locking position, the filter bottle cap 16 can be in limiting cooperation with the limiting ring 12, and the filter bottle cap 16 seals the first bottle mouth 114 of the filter bottle body 11. When the limiting ring 12 moves out of the locking position, the filter bottle cap 16 can be loosened from the first bottle mouth 114 of the filter bottle body 11.

[0060] For the detachable filter element assembly 10 provided by the above solution, by adopting the filter bottle body 11 described in any one of the above embodiments, the guiding protrusion 111 can enter the limiting section 1212 quickly and accurately during the assembly process, thereby restricting the movement of the filter bottle cap 16 relative to the filter bottle body 11 and improving the convenience of assembly.

[0061] Specifically, as Figure 5 shown, in one embodiment, the opening end of the filter bottle cap 16 is provided with tooth grooves 161 for limiting cooperation with the limiting ring 12 located at the locking position. Specifically, the tooth grooves 161 are used to cooperate with the convex teeth 15 on the limiting ring 12.

[0062] Further, as Figure 5 shown, in one embodiment, there are multiple tooth grooves 161, and the multiple tooth grooves 161 are distributed in a circle along the circumferential direction of the filter bottle cap 16. Thus, during the assembly process, as long as the convex teeth 15 on the limiting ring 12 are inserted into one of the tooth grooves 161, the concave-convex fit between the limiting ring 12 and the filter bottle cap 16 can be achieved, further improving the convenience of assembly and reducing the requirement for manufacturing precision.

[0063] Further, in another embodiment, a water purifier is provided, which includes the detachable filter element assembly 10 described in any one of the above.

[0064] The water purifier provided by the above solution improves the convenience during assembly by adopting the detachable filter element assembly 10 described in any one of the above embodiments.

[0065] Specifically, the water purifier may include the filter element mounting seat, the filter bottle body 11 is screwed onto the filter element mounting seat, the screwing direction of the filter bottle body 11 is the same as the rotation direction of screwing the filter bottle cap 16 onto the filter bottle body 11, and the bottle mouth at the head end of the filter bottle body 11 is communicated with the filter element mounting seat.

[0066] Further, in one embodiment, the water purifier further includes an overall machine housing, the filter element mounting seat is connected to the overall machine housing, and a locking protrusion is provided on the overall machine housing. 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.

[0067] During the disassembly process, when the filter bottle body 11 is not removed from the filter element mounting seat, the locking protrusion always limits the limiting member at the locking position. As the filter bottle body 11 is gradually pulled out from the overall machine housing, the limiting member gradually disengages from the locking protrusion. At this time, the limiting member can be pushed in a direction away from the first bottle mouth 114, so that the limiting member exits the locking position and the convex teeth 15 exit the tooth grooves 161.

[0068] 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.

[0069] Furthermore, the terms "first" and "second" are 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, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0070] In the present invention, unless otherwise clearly specified and defined, terms such as "mounted", "connected", "coupled", "fixed", etc. should be understood 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 communication inside two elements or the interaction relationship between two elements, 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.

[0071] 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 in indirect 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.

[0072] 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", "above", "below", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0073] 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 as within the scope described in this specification.

[0074] 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 bottle body unit, characterized in that, It includes a filter bottle body and a limit ring. The limit ring is sleeved outside the filter bottle body and can move axially along the filter bottle body. One of the filter bottle body and the limit ring is provided with a guiding protrusion, and the other is provided with a guiding groove arranged axially along the filter bottle body. The guiding groove includes a communicating guiding section and a limiting section. The width of the guiding section is greater than that of the limiting section. When the limit ring moves to the locking position, the guiding protrusion enters the limiting section from the guiding section, and the limit ring can be in limit cooperation with the filter bottle cap to limit the movement of the filter bottle cap relative to the limit ring to prevent the filter bottle cap from loosening from the filter bottle body. The filter bottle cap is screwed onto the first bottle mouth of the filter bottle body to seal the first bottle mouth, and the second bottle mouth of the filter bottle body is 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 end face of the limiting protrusion facing the filter bottle cap is provided with convex teeth, and the open end of the filter bottle cap is provided with tooth grooves for cooperating with the convex teeth on the limit ring. Reinforcing limit ribs are provided at the positions of both side walls of the limiting section and are arranged axially along the filter bottle body. The limit ring is provided with a limiting protrusion, and the outer side surface of the filter bottle body is provided with an anti-retreat protrusion. When the limit ring moves to the locking position, the anti-retreat protrusion is limited to the side of the limiting protrusion away from the filter bottle cap.

2. The filter bottle body unit according to claim 1, characterized in that, The width of the guiding section gradually decreases in the direction close to the limiting section.

3. The filter bottle body unit according to claim 2, characterized in that, Both side walls of the guiding section are arc surfaces convex towards the inside of the guiding section.

4. The filter bottle body unit according to claim 1, characterized in that, Both the guiding protrusion and the guiding groove are multiple. The multiple guiding protrusions are arranged at intervals along the circumferential direction of the filter bottle body, and the multiple guiding grooves are arranged at intervals along the circumferential direction of the limit ring. The guiding protrusions and the guiding grooves correspond to each other one by one.

5. The filter bottle body unit according to claim 1, characterized in that, The anti-retreat protrusion includes an annular protrusion surrounding the outer side surface of the filter bottle body. The limiting protrusions are multiple and are arranged at intervals in the circumferential direction of the limit ring.

6. The filter bottle body unit according to claim 5, characterized in that, The guiding protrusion is located on the filter bottle body, the guiding groove is located on the inner side surface of the limit ring. The guiding protrusion is connected to the anti-retreat protrusion and is located on the side of the anti-retreat protrusion away from the filter bottle cap. The limiting protrusion is located at the part of the limit ring close to the filter bottle cap.

7. The filter bottle body unit according to claim 1, characterized in that, The guiding protrusion is located on the filter bottle body, the guiding groove is located on the inner side surface of the limit ring. The limiting protrusion is connected to the end face of the limit ring facing the filter bottle cap and extends into the space surrounded by the limit ring. The guiding groove penetrates through both end faces of the limit ring, and the limiting protrusions are provided on both sides at the entrance of the guiding section.

8. The filter bottle body unit according to claim 1, characterized in that The outer side surface of the filter bottle body is provided with an external thread, and the external thread is limited to the side of the limiting protrusion close to the filter bottle cap.

9. A detachable filter element assembly, characterized in that, Comprising a filter bottle cap and the filter bottle body unit according to any one of claims 1 to 8, the filter bottle cap is detachably connected to the filter bottle body. When the limiting ring moves to the locking position, the filter bottle cap can be in limiting cooperation with the limiting ring, and the filter bottle cap seals the first bottle mouth of the filter bottle body. When the limiting ring moves out of the locking position, the filter bottle cap can be detached from the first bottle mouth of the filter bottle body.

10. The detachable filter element assembly according to claim 9, characterized in that, The tooth grooves are multiple, and the multiple tooth grooves are distributed in a circle along the circumferential direction of the filter bottle cap.

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

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