CN214485980U - Filter core structure and purifier - Google Patents

Abstract

The utility model discloses a filter element structure and a water purifier, wherein the filter element structure comprises a filter flask body, a filter flask cover and an end cover, the filter flask body is provided with an installation cavity and an opening communicated with the installation cavity; the filter bottle cover is provided with an accommodating cavity, and the filter bottle cover is sleeved at the opening end through the accommodating cavity; the end cover is used for plugging the opening and is connected to the inner wall of the accommodating cavity; the filter bottle cover can move relative to the filter bottle body, and moves relative to the opening end along the direction in which the opening end is sleeved to drive the end cover to move along the first state that the opening extends into the installation cavity relative to the opening end along the direction in which the opening end exits the opening end and drive the end cover to exit the second state of the installation cavity along the opening end. This filter core structure and purifier when using, can be more convenient demolish the filter core.

Description

Filter core structure and purifier

Technical Field

The utility model relates to a purifier technical field especially relates to a filter core structure and purifier.

Background

Along with the improvement of living standard, people pay more and more attention to living health quality, and the health problem of family drinking water has been the focus of social concern for a long time, therefore, people often select the purifier to purify domestic water in order to promote water quality.

Filter core life in the purifier is limited, and the purifier needs the renew cartridge after long-time the use, however, traditional purifier is when the renew cartridge, and the filter core dismouting is inconvenient, influences the efficiency of renew cartridge.

SUMMERY OF THE UTILITY MODEL

Based on this, when renew cartridge to traditional purifier, the filter core dismouting is inconvenient, influences the problem of renew cartridge's efficiency, has provided a filter core structure and purifier, and this filter core structure and purifier can be more convenient demolish the filter core when using.

The specific technical scheme is as follows:

on one hand, the filter element structure comprises a filter bottle body, a filter bottle cover and an end cover, wherein an installation cavity is arranged in the filter bottle body, the filter bottle body comprises an opening end, and the opening end is provided with an opening communicated with the installation cavity; the filter bottle cover is provided with an accommodating cavity, and the filter bottle cover is sleeved at the opening end through the accommodating cavity; the end cover is used for plugging the opening and is connected to the inner wall of the accommodating cavity; the filter bottle cover can move relative to the filter bottle body, and when the filter bottle cover is in a first state, the filter bottle cover moves relative to the opening end along the direction sleeved on the opening end so as to drive the end cover to extend into the first state of the installation cavity along the opening; when the filter bottle cover is in the second state, the filter bottle cover moves relative to the opening end along the direction of withdrawing the opening end and drives the end cover to withdraw from the second state of the mounting cavity along the opening.

The technical solution is further explained below:

in one embodiment, the device further comprises a connecting piece, and the end cover is movably connected with the inner wall of the accommodating cavity through the connecting piece;

when the filter bottle cap is in a first state, the filter bottle cap moves relative to the opening end along the direction sleeved on the opening end, and the filter bottle cap pushes the end cover to extend into the mounting cavity along the opening through the inner wall of the accommodating cavity;

when the filter bottle cover is in a second state, the filter bottle cover moves relative to the opening end along the direction of withdrawing from the opening end, and the filter bottle cover pulls the end cover through the connecting piece to withdraw from the mounting cavity along the opening.

In one embodiment, the inner wall of the receiving cavity is rotatably connected to the filter flask body.

In one embodiment, the inner wall of the accommodating cavity is provided with a first thread structure, and the outer wall of the opening end is provided with a second thread structure which is in threaded fit with the first thread structure.

In one embodiment, the outer diameter of the filter bottle body is D, the thread pitch of the first thread structure is D, wherein D is more than or equal to 0.04D and less than or equal to 0.08D.

In one embodiment, the first thread structure is provided with a first thread stop, and the second thread structure is provided with a second thread stop which is in limit fit with the first thread stop.

In one embodiment, the starting end of the second thread structure includes a spiral protrusion, the end surface of the spiral protrusion is the second thread stop, the end of the first thread structure is provided with a spiral groove for spirally matching with the spiral protrusion, and the end surface of the spiral groove is the first thread stop for limiting and matching with the spiral protrusion.

In one embodiment, the filter bottle cap comprises a mounting body, the mounting body is fixedly arranged on the inner wall of the accommodating cavity, the end cover is provided with a first mounting surface and a second mounting surface which are arranged oppositely, the end cover is further provided with mounting holes penetrating through the first mounting surface and the second mounting surface, and the first mounting surface is closer to the bottom wall of the accommodating cavity than the second mounting surface;

the mounting body is movably inserted into the mounting hole from one side of the first mounting surface, one end of the connecting piece extends into the mounting hole along one side of the second mounting surface and is connected with the mounting body, and the other end of the connecting piece is in limit fit with the inner wall of the mounting hole or the second mounting surface.

In one embodiment, the bottom wall of the accommodating cavity is formed with a support portion for supporting the first mounting surface.

In one embodiment, the connecting piece comprises a screw, one end of the screw is connected with the mounting body, and the other end of the screw is in limit fit with the inner wall of the mounting hole.

In one embodiment, a first limiting protrusion is formed on the inner wall of the mounting hole, the first limiting protrusion comprises a first limiting surface facing the second mounting surface, the height of the first limiting surface from the first mounting surface is smaller than the length of the mounting body, and the other end of the connecting piece is in limiting fit with the first limiting surface;

when the filter bottle cover is in a first state, the filter bottle cover moves relative to the opening end along the direction sleeved on the opening end, and the filter bottle cover pushes the end cover to extend into the mounting cavity along the opening through the contact fit of the inner wall of the accommodating cavity and the first mounting surface;

when the filter bottle cap is in a second state, the filter bottle cap moves relative to the open end in the direction of withdrawing from the open end, and the filter bottle cap pulls the end cover to withdraw from the installation cavity along the opening through the contact fit of the other end of the connecting piece and the first limiting surface.

In one embodiment, the first limiting surface is provided with an abutting protrusion, the abutting protrusion is used for abutting with the connecting piece, and the height of the abutting protrusion from the first mounting surface is smaller than the length of the mounting body.

In one embodiment, the mounting body further comprises a first sealing ring, the mounting body comprises an insertion portion and a boss, the boss is fixedly arranged on the bottom wall of the accommodating cavity, the insertion portion is fixedly arranged on the boss, the boss protrudes out relative to the circumferential side wall of the insertion portion, the first limiting protrusion further comprises a second limiting surface arranged relative to the first limiting surface, when the insertion portion is inserted into the mounting hole, the second limiting surface and the boss are arranged at intervals to form a first mounting space, and the first sealing ring is sleeved on the insertion portion and is hermetically arranged in the first mounting space.

In one embodiment, the filter bottle further comprises a limiting member, one end of the limiting member is connected with the filter bottle cap, and the other end of the limiting member is in limiting fit with the filter bottle body to limit the filter bottle cap to be separated from the open end so as to open the opening.

In one embodiment, the filter bottle body is provided with a first limiting part and a second limiting part which are arranged at intervals along the length direction of the filter bottle body, the first limiting part and the second limiting part are arranged at intervals with the filter bottle cover, and the first limiting part is closer to the filter bottle cover relative to the second limiting part;

the limiting piece is sleeved on the filter flask body, one end of the limiting piece is provided with a first connecting part used for being connected with the filter flask cover, the other end of the limiting piece is provided with a third limiting part used for being in limiting fit with the first limiting part and the second limiting part, and the limiting piece can move between the second limiting part and the third limiting part through the limiting fit of the third limiting part and the first limiting part and the second limiting part;

when the limiting part moves along the direction from the second limiting part to the first limiting part, the filter flask cover is connected with the first connecting part and connected with the filter flask cover.

In one embodiment, the limiting member is a limiting ring, the third limiting portion is formed on the inner wall of the limiting member, the third limiting portion includes a limiting buckle, a second limiting protrusion and a third limiting protrusion, the second limiting protrusion and the third limiting protrusion are arranged at intervals along the circumferential direction of the limiting member, the limiting buckle is arranged between the second limiting protrusion and the third limiting protrusion, and the limiting buckle, the second limiting protrusion and the third limiting protrusion are all installed between the first limiting portion and the second limiting portion in a limiting manner;

the limiting buckle is in limiting fit with the first limiting part, the second limiting protrusion and/or the third limiting protrusion is in limiting fit with the second limiting part, and the first limiting part is in limiting installation between the second limiting protrusion and the third limiting protrusion.

In one embodiment, the first connecting part is a first plugging protrusion, and the filter bottle cap is provided with a first plugging groove which is plugged and matched with the first plugging protrusion.

In one embodiment, the filter bottle further comprises an installation cylinder, the filter bottle body is inserted into the installation cylinder, a fourth limiting portion is arranged on the inner wall of the installation cylinder, when the filter bottle body extends into the installation cylinder, the fourth limiting portion is in limiting fit with the limiting member, and the limiting member is pushed to move the filter bottle cover along the direction from the second limiting portion to the first limiting portion to be connected, so that the first connection portion can be connected with the filter bottle cover.

In one embodiment, one end of the limiting member is provided with a second connecting portion, the filter bottle cap is provided with a third connecting portion in clamping fit with the second connecting portion, and the limiting member is in clamping fit with the filter bottle cap through the second connecting portion and the third connecting portion to be connected with the filter bottle cap.

In one embodiment, the limiting member is a limiting ring, the second connecting portion is disposed on an inner wall of the limiting ring, the second connecting portion includes a buckle, a fourth limiting protrusion and a fifth limiting protrusion, the fourth limiting protrusion and the fifth limiting protrusion are disposed at intervals along a circumferential direction of the limiting member, and the buckle is disposed between the fourth limiting protrusion and the fifth limiting protrusion;

the third connecting portion are protruding, the buckle with protruding joint cooperation of card, just protruding spacing the installing of card in the fourth spacing arch with between the fifth spacing arch.

In one embodiment, the outer wall of the filter bottle body is provided with a first insertion part, the other end of the limiting part is provided with a second insertion part, and the other end of the limiting part is in insertion fit with the filter bottle body through the insertion fit of the first insertion part and the second insertion part so as to be in limit fit with the filter bottle body.

In one embodiment, the filter device further comprises an inner core, wherein the inner core comprises a filter material and an inner cylinder, the filter material is detachably arranged in the inner cylinder, and the inner cylinder is detachably arranged in the mounting cavity.

In another aspect, the present application further relates to a water purifier, including the filter element structure in any one of the above embodiments.

When the filter element structure and the water purifier are used, the filter element is arranged in the installation cavity, and at the moment, the end cover is driven to move along the direction sleeved on the opening end relative to the opening end by driving the filter bottle cover so as to drive the end cover to extend into the installation cavity along the opening end, so that the filter element is packaged in the installation cavity; when needing to change the filter core, then order about the filter bottle lid is relative the open end is along withdrawing from the direction removal of open end and drive the end cover is followed the opening, at this moment, opens the opening, and the user can take out the inner core along the installation intracavity, changes, and it is convenient to use, and need not to abandon whole filter core structure when the inner core reaches the life-span, and then can practice thrift the replacement cost.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention in any way.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Furthermore, the drawings are not to scale of 1:1, and the relative dimensions of the various elements in the drawings are drawn only by way of example and not necessarily to true scale.

FIG. 1 is an exploded view of a filter cartridge arrangement according to one embodiment;

FIG. 2 is an exploded schematic view of a filter cartridge arrangement according to another embodiment;

FIG. 3 is a cross-sectional view of a cartridge arrangement according to one embodiment;

FIG. 4 is a schematic view of an embodiment of the assembly of a filter cap and end cap;

FIG. 5 is an enlarged view of a portion B of FIG. 4;

FIG. 6 is a schematic structural view of an end cap according to an embodiment;

FIG. 7 is a schematic diagram of an embodiment of a filter cap;

FIG. 8 is a schematic view of an embodiment of a filter cartridge body assembled with a mounting cartridge;

FIG. 9 is an enlarged partial view of C in FIG. 8;

FIG. 10 is a schematic structural diagram of a position-limiting element according to an embodiment;

FIG. 11 is an enlarged view of a portion of FIG. 3;

FIG. 12 is a schematic structural diagram of a position limiting element according to another embodiment;

FIG. 13 is a schematic view of another embodiment of a filter cap;

FIG. 14 is a schematic view of another embodiment of the assembly of the filter cap, the retainer and the filter body;

FIG. 15 is a schematic view of another embodiment of the assembly of the filter cap, the retainer and the filter body;

FIG. 16 is a schematic view of a filter according to an embodiment;

FIG. 17 is a structural schematic of an inner barrel in one embodiment;

FIG. 18 is an enlarged partial view of D in FIG. 16;

FIG. 19 is an enlarged partial view of E in FIG. 17;

FIG. 20 is a schematic structural view of the core in one embodiment;

fig. 21 is a partially enlarged view of F in fig. 20.

Description of reference numerals:

10. a filter element structure; 100. a filter flask body; 110. a mounting cavity; 120. an open end; 122. an opening; 124. a second thread formation; 1242. a spiral protrusion; 12422. stopping the second thread; 130. a first limiting part; 140. a second limiting part; 150. a first insertion part; 200. a filter bottle cap; 210. an accommodating chamber; 212. a first thread formation; 2122. a spiral groove; 21222. stopping the first thread; 214. a support portion; 220. an installation body; 222. an insertion portion; 224. a boss; 230. a first installation space; 240. a first insertion groove; 250. a third connecting portion; 300. an end cap; 310. a first mounting surface; 320. a second mounting surface; 330. mounting holes; 332. a first limit protrusion; 3322. a first limiting surface; 33222. an abutment projection; 3324. a second limiting surface; 400. a connecting member; 500. a limiting member; 510. a first connection portion; 520. a third limiting part; 522. a limit buckle; 524. a second limit bulge; 526. a third limiting bulge; 530. a second connecting portion; 532. buckling; 534. a fourth limit bulge; 536. a fifth limiting bulge; 540. a second insertion part; 600. mounting the cylinder; 610. a fourth limiting part; 700. an inner core; 710. a filter material; 712. a filter material body; 714. a mounting frame; 7142. a fifth limiting part; 716. a seventh limiting part; 7162. a sixth limiting bulge; 7164. a limiting groove; 720. an inner barrel; 722. a sixth limiting part; 724. an eighth limiting part; 7242. a seventh limiting bulge; 7244. an eighth limiting bulge; 7246. a ninth limiting bulge; 726. a second installation space; 810. a first seal ring; 820. a second seal ring; 900. a handle.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Referring to fig. 1 and 2, an embodiment of a filter element structure 10 includes an inner core 700, a filter bottle body 100, a filter bottle cap 200, and an end cap 300, wherein the filter bottle body 100 includes an open end 120, an installation cavity 110 is disposed in the filter bottle body 100, the open end 120 is provided with an opening 122 communicating with the installation cavity 110, the inner core 700 is inserted into the installation cavity 110 along the opening 122 and is disposed in the installation cavity 110, the end cap 300 is inserted into the installation cavity 110 through the opening 122 to close the opening 122, the filter bottle cap 200 covers the end cap 300 and is sleeved outside the filter bottle body 100, and when a filter element needs to be replaced, the filter bottle cap 200 and the end cap 300 are removed, and the inner core 700 is removed from the installation cavity 110.

Referring to fig. 3 and 4, the filter cap 200 has a receiving cavity 210, and the filter cap 200 is sleeved on the opening end 120 through the receiving cavity 210. Referring to fig. 3, the end cap 300 is used for sealing the opening 122, and the end cap 300 is connected to the inner wall of the accommodating cavity 210. During the process of sleeving the filter bottle cap 200 on the filter bottle body 100, the filter bottle cap 200 pushes the end cap 300 to be inserted into the mounting cavity 110 along the opening 122 to seal the opening 122. When it is desired to replace the filter cartridge, the filter cap 200 is removed from the filter body 100, and during removal of the filter cap 200, the filter cap 200 can be pulled along with the end cap 300 out of the mounting cavity 110 to open the opening 122.

Alternatively, the filter cap 200 can be moved relative to the filter bottle body 100, and the filter cap 200 can be inserted into the filter bottle body 100 or removed from the filter bottle body 100 by moving relative to the filter bottle body 100. The manner of movement of the filter bottle cap 200 relative to the filter bottle body 100 may be: the filter bottle cap 200 moves in a linear direction relative to the filter bottle body 100, similar to a plugging and unplugging manner; alternatively, the filter cap 200 may be rotated relative to the filter bottle body 100, for example, the filter cap 200 may be threadably coupled to the filter bottle body 100, and the filter cap 200 may be threadably mounted to the filter bottle body 100.

In the implementation process, referring to fig. 3, when the filter bottle cap 200 is in the first state, at this time, the filter bottle cap 200 moves relative to the open end 120 along the direction of sleeving the open end 120, and the filter bottle cap 200 drives the end cap 300 to extend into the mounting cavity 110 along the opening 122, at this time, the sealing of the opening 122 and the mounting of the filter bottle cap 200 are completed.

Referring to fig. 2, when the filter bottle cap 200 is in the second state, the filter bottle cap 200 moves relative to the open end 120 in a direction of withdrawing from the open end 120, and the filter bottle cap 200 drives the end cap 300 to withdraw from the mounting cavity 110 along the opening 122, at this time, the inner core 700 can be taken out along the mounting cavity 110, and the inner core 700 is cleaned or replaced, so that the use is convenient. Moreover, the entire filter cartridge assembly 10 need not be discarded when the core 700 has reached its life, thereby saving replacement costs.

The alternative mounting between the end cap 300 and the filter cap 200 will be described with reference to the following embodiments.

Referring to fig. 3, to facilitate the end cap 300 sealing the opening 122, a second sealing ring 820 is generally disposed between the end cap 300 and the inner wall of the filter flask body 100 at the opening 122. Because the end cap 300 is connected to the inner wall of the accommodating cavity 210, when the filter bottle cap 200 is mounted on the filter bottle body 100 in a relative rotation manner, the friction between the end cap 300 and the second sealing ring 820 and between the second sealing ring 820 and the inner wall of the accommodating cavity 210 is too large to prevent the end cap 300 and the filter bottle cap 200 from being detached and installed due to the fact that the filter bottle body 100 drives the end cap 300 to rotate relative to the accommodating cavity 210 during rotation. Referring to fig. 4 and 5, in the present embodiment, the filter element structure 10 further includes a connector 400, and the end cap 300 is movably connected to the inner wall of the accommodating cavity 210 through the connector 400. Therefore, when the filter cap 200 rotates, the end cap 300 will not be driven to rotate, and only the inner wall of the accommodating cavity 210 will press the end cap 300 to extend into the mounting cavity 110 along the opening 122.

In use, when the filter bottle cap 200 is in the first state, the filter bottle cap 200 moves relative to the open end 120 in a direction of sleeving the open end 120, and the filter bottle cap 200 pushes the end cap 300 to extend into the mounting cavity 110 along the opening 122 through the inner wall of the accommodating cavity 210. When the filter cap 200 is in the second state, the filter cap 200 is moved relative to the open end 120 in a direction to withdraw the open end 120, and the filter cap 200 is pulled by the connector 400 to withdraw the end cap 300 from the mounting cavity 110 along the opening 122.

Referring to fig. 5, which shows an assembly manner between the end cap 300 and the filter bottle cap 200 in an embodiment, in the embodiment, the filter bottle cap 200 includes a mounting body 220, and referring to fig. 4, the mounting body 220 is fixedly disposed on an inner wall of the accommodating cavity 210.

Specifically, referring to fig. 6, the end cap 300 is provided with a first mounting surface 310 and a second mounting surface 320 which are oppositely arranged, the end cap 300 is further provided with a mounting hole 330 which penetrates through the first mounting surface 310 and the second mounting surface 320, and the first mounting surface 310 is closer to the bottom wall of the accommodating cavity 210 than the second mounting surface 320. The mounting body 220 is movably inserted into the mounting hole 330 from one side of the first mounting surface 310, so that when the filter cap 200 rotates, the mounting body 220 cannot drive the end cap 300 to rotate, and thus, the friction between the end cap 300 and the side wall of the accommodating cavity 210 when the end cap 300 rotates relative to the side wall of the accommodating cavity 210 is prevented from hindering the rotation of the filter cap 200.

Further, with reference to fig. 5, one end of the connecting member 400 extends into the mounting hole 330 along one side of the second mounting surface 320 and is connected to the mounting body 220, and the other end of the connecting member 400 is in limit fit with the inner wall of the mounting hole 330 or the second mounting surface 320. Thus, the end cap 300 is connected to the inner wall of the receiving cavity 210 through the mounting body 220 and the connecting member 400, and it can be understood that the end cap 300 is indirectly connected to the inner wall of the receiving cavity 210. And the connector 400 is capable of pulling the end cap 300 out of the opening 122 and out of the mounting cavity 110 as the filter bottle cap 200 is withdrawn from the filter bottle body 100.

Referring to fig. 5, in the present embodiment, the connecting member 400 is in limit fit with the inner wall of the mounting hole 330; specifically, a first limiting protrusion 332 is formed on an inner wall of the mounting hole 330, the first limiting protrusion 332 includes a first limiting surface 3322 facing the second mounting surface 320, a height of the first limiting surface 3322 from the first mounting surface 310 is smaller than a length of the mounting body 220, and the other end of the connecting member 400 is in limiting fit with the first limiting surface 3322. In this way, it is ensured that the mounting body 220 can be movably disposed in the mounting hole 330, and when the filter cap 200 is in the second state, the connecting member 400 can pull the end cap 300 out of the accommodating cavity 210.

In use, when the filter cap 200 is in the first state, the filter cap 200 moves relative to the open end 120 in a direction of being sleeved on the open end 120, and the filter cap 200 pushes the end cap 300 to extend into the mounting cavity 110 along the opening 122 through the contact fit between the inner wall of the accommodating cavity 210 and the first mounting surface 310.

When the filter bottle cap 200 is in the second state, the filter bottle cap 200 moves relative to the open end 120 in a direction of withdrawing from the open end 120, and the filter bottle cap 200 is in contact with the first stopper surface 3322 through the other end of the connecting member 400 to pull the end cap 300 to withdraw from the mounting cavity 110 along the opening 122.

Optionally, referring to fig. 5, the connecting member 400 includes a screw, one end of the screw is connected to the mounting body 220, and the other end of the screw is in limit fit with the inner wall of the mounting hole 330. One end of the screw is a fixed end, the other end of the screw is a screw cap of the screw, and the screw cap is in limit fit with the inner wall of the mounting cavity 110. Specifically, referring to fig. 5, the screw cap is engaged with the first position-limiting surface 3322 in a position-limiting manner, and when the end cap 300 is installed in the installation cavity 110, the screw cap and the first position-limiting surface 3322 are spaced apart from each other, so that when the filter bottle cap 200 is removed from the filter bottle body 100, the screw cap is driven to move upward to pull the end cap 300 out of the installation cavity 110.

In one embodiment, referring to fig. 6, the first position-limiting surface 3322 is formed with an abutting protrusion 33222, the abutting protrusion 33222 is used for abutting against the connector 400, and the height of the abutting protrusion 33222 from the first mounting surface 310 is less than the length of the mounting body 220. Thus, when the connector 400 is rotated and withdrawn by the filter cap 200, the friction between the connector 400 and the end cap 300 can be reduced.

Further, the connecting member 400 further includes a gasket, the gasket is inserted into the screw and disposed on the screw cap, and the abutting protrusion 33222 abuts against the gasket to reduce the friction force between the end cap 300 and the gasket.

Further, on the basis of the foregoing embodiment, in order to ensure the sealing performance of the assembly between the installation body 220 and the installation hole 330, referring to fig. 5, in this embodiment, the filter element structure 10 further includes a first sealing ring 810, and the first sealing ring 810 is disposed between the installation body 220 and the inner wall of the installation hole 330 to achieve the effect of sealing the installation hole 330.

Specifically, with reference to fig. 5, the mounting body 220 includes an insertion portion 222 and a boss 224, the boss 224 is fixedly disposed on the bottom wall of the accommodating cavity 210, the insertion portion 222 is fixedly disposed on the boss 224, and the boss 224 protrudes relative to the circumferential side wall of the insertion portion 222 to form a structure similar to a stepped column; the first position-limiting protrusion 332 further includes a second position-limiting surface 3324 opposite to the first position-limiting surface 3322, when the insertion portion 222 is inserted into the installation hole 330, the second position-limiting surface 3324 and the boss 224 are spaced apart to form a first installation space 230, and the first sealing ring 810 is sleeved on the insertion portion 222 and hermetically disposed in the first installation space 230. Thus, the first sealing ring 810 can seal the gap between the mounting body 220 and the mounting hole 330, so as to seal the mounting hole 330; in addition, the protrusion and the second limiting surface 3324 cooperate to prevent the first sealing ring 810 from falling off. Preferably, referring to fig. 5, the boss 224 is fixedly disposed at a central position of the bottom wall of the accommodating cavity 210, so that the end cap 300 can be positioned at the central position of the accommodating cavity 210 when the end cap 300 is mounted on the mounting body 220, so that the end cap 300 is aligned with the opening 122.

Referring to fig. 4, the bottom wall of the receiving cavity 210 forms a support portion 214 for supporting the first mounting surface 310, and when the end cap 300 is mounted in the mounting cavity 110, the end cap 300 is supported by the support portion 214 to avoid pressure-bearing deformation and fracture. Alternatively, the support portion 214 may be a support rib.

In the above embodiments, it is mentioned that the filter bottle cap 200 and the filter bottle body 100 can be installed in a straight-line sleeved or rotating manner. In this embodiment, as one of the mounting means, the inner wall of the receiving chamber 210 is rotatably connected to the filter flask body 100.

An alternative embodiment for achieving the rotational connection of the filter cap 200 and the filter body 100 will be described in detail with reference to the following examples.

Referring to fig. 2 and 7, the inner wall of the accommodating chamber 210 is provided with a first thread structure 212, and the outer wall of the open end 120 is provided with a second thread structure 124 which is spirally engaged with the first thread structure 212. In this manner, the filter cap 200 is assembled with the filter body 100 in a spiral manner. In addition, when the filter bottle body 100 and the filter bottle cap 200 are assembled by threads, the end cap 300 moves linearly when the filter bottle cap 200 advances or retreats in a screwing manner, so that the friction force generated when the end cap 300 and the filter bottle body 100 move linearly is overcome by the torque generated in the screwing process, and the assembly and disassembly are more labor-saving.

Further, the outer diameter of the filter flask body 100 is D, the thread pitch of the first thread structure 212 is D, wherein D is more than or equal to 0.04D and less than or equal to 0.08D. Thus, when the pitch of the first thread structure 212 is within the range, the filter bottle cap 200 can be rotated in a labor-saving manner and is convenient to disassemble and assemble.

In the conventional filter element structure 10, the first thread structure 212 on the filter bottle cap 200 is provided with a relief groove with gradually decreasing width, and when the second thread structure 124 is screwed with the first thread structure 212, the end of the second thread structure 124 can be screwed into the relief groove to generate holding force, so as to prevent the filter bottle cap 200 from falling off, but the filter bottle cap 200 and the filter bottle body 100 are difficult to detach.

When the user is installing filter bottle lid 200, on the one hand need filter bottle lid 200 can not drop from filter bottle body 100 easily, on the other hand needs again to dismantle laborsavingly between filter bottle lid 200 and the filter bottle body 100, so, then need not produce the power of holding tightly between first helicitic texture 212 and the second helicitic texture 124 in the complex in-process.

Referring to fig. 2 and 7, in the present embodiment, the first thread structure 212 has a first thread stop 21222, and the second thread structure 124 has a second thread stop 12422 engaging with the first thread stop 21222. As such, when the first and second thread structures 212, 124 are in limited engagement by the first and second thread stops 21222, 12422, the first and second thread structures 212, 124 cannot be rotated further to generate a tightening force.

Optionally, referring to fig. 2 and fig. 7, the starting end of the second thread structure 124 includes a spiral protrusion 1242, an end surface of the spiral protrusion 1242 is a second thread stop 12422, the end of the first thread structure 212 is provided with a spiral groove 2122 for spirally mating with the spiral protrusion 1242, and an end surface of the spiral groove 2122 is a first thread stop 21222 for limiting and mating with the thread protrusion. So, when the filter bottle cap 200 is screwed into the filter bottle body 100, the end surface of the spiral protrusion 1242 is in spacing fit with the end surface of the spiral groove 2122, the filter bottle cap 200 cannot rotate continuously but the tightening force between the filter bottle cap 200 and the filter bottle body 100 cannot be generated, when the filter bottle cap 200 is screwed out, the end surface of the spiral protrusion 1242 and the end surface of the spiral groove 2122 can be easily separated, and then the filter bottle cap 200 can be easily screwed out from the filter bottle body 100.

In addition to any of the above embodiments, referring to fig. 8 and 9, the filter element structure 10 further includes a mounting tube 600, and the filter bottle body 100 is inserted into the mounting tube 600. The filter cap 200 also includes a handle 900, and it is generally necessary to grasp the handle 900 and rotate the filter cap 200 to rotate the filter cap 200 and filter body 100 out of the mounting cartridge 600 when removing the mounting cartridge 600 and filter body 100. In order to prevent the filter bottle cap 200 from being screwed down together when the mounting cartridge 600 is removed, thereby preventing water in the filter bottle body 100 from leaking, the filter bottle cap 200 needs to be fixed or the rotation range of the filter bottle cap 200 needs to be limited.

Referring to fig. 3, the filter element structure 10 further includes a limiting member 500, one end of the limiting member 500 is connected to the filter bottle cap 200, and the other end of the limiting member 500 is in limiting fit with the filter bottle body 100 to limit the separation of the filter bottle cap 200 and the open end 120 to open the opening 122. The limiting member 500 is installed on the filter bottle body 100, and when the filter bottle cap 200 is sleeved on the filter bottle body 100, the filter bottle cap 200 is limited on the filter bottle body 100 by the limiting member 500, so that the filter bottle cap 200 is prevented from being detached together when the mounting cylinder 600 is detached.

Wherein, the other end of locating part 500 and the spacing cooperation of filter flask body 100 can be: the limiting member 500 can be directly fixed on the filter bottle body 100 or the limiting member 500 can move with the filter bottle body 100, but the filter bottle body 100 limits the moving range of the limiting member 500 by the limiting cooperation of the limiting member 500 and the filter bottle body 100, thereby indirectly limiting the opening 122 which can not be opened by separating the filter bottle cover 200 from the filter bottle body 100.

Referring to fig. 3 and 10, in one embodiment, the limiting member 500 is sleeved on the filter bottle body 100, one end of the limiting member 500 is provided with a first connecting portion 510 for connecting with the filter bottle cap 200, and when the filter bottle body 100 is inserted into the mounting cylinder 600, the mounting cylinder 600 pushes the limiting member 500 to move until the first connecting portion 510 is connected with the filter bottle cap 200. Optionally, referring to fig. 9, the inner wall of the mounting tube 600 is provided with a fourth limiting portion 610, and when the filter bottle assembly extends into the mounting tube 600, the fourth limiting portion 610 is in limiting fit with the limiting member 500, and pushes the limiting member 500 to move along, so that the first connecting portion 510 can be detachably connected with the filter bottle cap 200.

In order to avoid that the limiting member 500 falls off from the filter bottle body 100 when the mounting barrel 600 is detached, referring to fig. 11, the filter bottle body 100 is provided with a first limiting portion 130 and a second limiting portion 140 which are arranged at intervals along the length direction of the filter bottle body 100, the first limiting portion 130 is closer to the filter bottle cap 200 than the second limiting portion 140, the other end of the limiting member 500 is provided with a third limiting portion 520 which is used for limiting and matching with the first limiting portion 130 and the second limiting portion 140, and the limiting member 500 can move between the second limiting portion 140 and the third limiting portion 520 through the limiting and matching of the third limiting portion 520 and the first limiting portion 130 and the second limiting portion 140. Alternatively, the first position-limiting part 130 may be protrusions, and the number of the protrusions corresponds to the number of the third position-limiting parts 520; the second position-limiting portion 140 is an annular protrusion.

Specifically, referring to fig. 11, when the filter bottle body 100 is mounted on the mounting tube 600, the limiting member 500 moves along the direction from the second limiting portion 140 to the first limiting portion 130 until the first connecting portion 510 is detachably connected to the filter bottle cap 200 under the pushing of the mounting tube 600.

Further, in order to enable the stopper 500 to be detachably connected to the filter cap 200 when pushed by the mounting cylinder 600, the rotation range of the stopper 500 needs to be limited. Based on this, referring to fig. 10 and fig. 11, in the present embodiment, the limiting member 500 is a limiting ring, a third limiting portion 520 is formed on an inner wall of the limiting member 500, the third limiting portion 520 includes a limiting buckle 522, a second limiting protrusion 524 and a third limiting protrusion 526, and the second limiting protrusion 524 and the third limiting protrusion 526 are disposed at intervals along a circumferential direction of the limiting member 500. The limit button 522 is arranged between the second limit protrusion 524 and the third limit protrusion 526, and the limit button 522, the second limit protrusion 524 and the third limit protrusion 526 are all installed between the first limit part 130 and the second limit part 140 in a limiting manner. The position-limiting buckle 522 is engaged with the first position-limiting portion 130 in a position-limiting manner, so that the position-limiting member 500 cannot be separated from the bottle body 100 from the opening end 120. In addition, the second limiting protrusion 524 and/or the third limiting protrusion 526 are/is in limiting fit with the second limiting portion 140, so that the limiting member 500 cannot be separated from the filter bottle body 100 from the other end opposite to the open end 120, and further, the limiting member 500 is limited on the filter bottle body 100 and cannot fall off. The second limiting protrusion 524 and the third limiting protrusion 526 are protruded along the inner wall of the limiting member 500, so that when the limiting member 500 is separated from the filter bottle cap 200, the filter bottle cap 200 just falls down to overlap with the second limiting portion 140 for limiting and matching.

Further, the first limiting portion 130 is installed between the second limiting protrusion 524 and the third limiting protrusion 526 in a limiting manner, so that the rotation range of the limiting member 500 is limited by the limiting cooperation of the second limiting protrusion 524 and the first limiting portion 130 and the limiting cooperation of the third limiting protrusion 526 and the first limiting portion 130, and then the limiting member 500 can only rotate in the region, so that the detachable connection between the limiting member 500 and the filter bottle cap 200 is facilitated. In addition, the rotation range of the limiting member 500 is further limited by the limiting fit of the second limiting protrusion 524 and the first limiting portion 130 and the limiting fit of the third limiting protrusion 526 and the first limiting portion 130, that is, the rotation range of the filter bottle cap 200 can be limited, and even if the mounting cylinder 600 is screwed out of the filter bottle body 100, the filter bottle cap 200 cannot be screwed out, so that the filter bottle body 100 and the filter bottle cap 200 can be separated from the mounting cylinder 600 together, and the inner core 700 can be conveniently and subsequently replaced or maintained independently.

Optionally, the first connection portion 510 is a first insertion protrusion, and the filter bottle cap 200 is provided with a first insertion groove 240 for insertion fit with the first insertion protrusion.

Referring to fig. 10, the first inserting protrusion is in the shape of an isosceles triangle, the first inserting groove 240 is in the shape of a trapezoid, four first inserting protrusions are arranged at intervals along the circumferential direction of the limiting member 500, four first inserting grooves 240 are arranged at intervals along the circumferential direction of the filter bottle cap 200, each first inserting groove 240 includes three first inserting grooves 240, and the three first inserting grooves 240 are arranged at certain intervals along the circumferential direction of the filter bottle cap 200, and the specific interval is designed as required. The first plug-in projections, when assembled, engage with the first plug-in grooves 240 located in the single group of first plug-in grooves 240 in an intermediate position. Optionally, the longitudinal section of the first plugging protrusion is an isosceles triangle, and the base angle is 55-65 °. Within this range, the stopper 500 and the filter flask cover 200 can be easily attached and detached. The height of the first inserting projection is 3 mm-5 mm, when the first inserting projection is matched with the first inserting groove 240, the torque of the screw buckle at the water outlet end of the filter element is smaller than the maximum force of the elastic deformation of the first inserting projection, and therefore the filter bottle body 100 and the filter bottle cap 200 do not rotate relatively.

Further, the distance between the second limiting protrusion 524 and the third limiting protrusion 526 is greater than the length of the first limiting portion 130, and the difference between the distance between the second limiting protrusion 524 and the third limiting protrusion 526 and the length of the first limiting portion 130 is 2 to 3 times of the distance between two adjacent first insertion grooves 240 in a single group of first insertion grooves 240, so that a certain moving distance of the first insertion protrusions can be ensured when the first insertion protrusions are inserted into the first insertion grooves 240, and the sharp corners at the tops of the first insertion protrusions can be led into the first insertion grooves 240 along the oblique edges of the first insertion grooves 240 within the range of the first insertion grooves 240, thereby facilitating assembly between the first insertion protrusions and the first insertion grooves 240.

In another embodiment, referring to fig. 12 and 14, one end of the limiting member 500 is provided with a second connecting portion 530, the filter bottle cap 200 is provided with a third connecting portion 250 which is in snap fit with the second connecting portion 530, and the limiting member 500 is in snap fit with the third connecting portion 250 through the second connecting portion 530 so as to be detachably connected with the filter bottle cap 200.

Optionally, referring to fig. 12, the limiting member 500 is a limiting ring, the second connecting portion 530 is disposed on an inner wall of the limiting ring, the second connecting portion 530 includes a buckle 532, a fourth limiting protrusion 534 and a fifth limiting protrusion 536, the fourth limiting protrusion 534 and the fifth limiting protrusion 536 are disposed at intervals along a circumferential direction of the limiting member 500, and the buckle 532 is disposed between the fourth limiting protrusion 534 and the fifth limiting protrusion 536. The third connecting portion 250 is a snap, and the snap 532 is engaged with the snap, so that when the filter bottle cap 200 is installed on the filter bottle body 100, the filter bottle cap 200 can be connected to the position-limiting member 500 through the engagement of the snap and the snap 532.

Further, a snap bump stopper is installed between the fourth stopper protrusion 534 and the fifth stopper protrusion 536. Therefore, when the limit fit between the clamping projection and the fourth limit projection 534 and the limit fit between the clamping projection and the fifth limit projection 536 limit the rotation range of the limiting member 500, and further the limiting member 500 can limit the rotation range of the filter bottle cap 200, on one hand, the clamping fit between the clamping projection and the buckle is convenient; on the other hand, even if the mounting cylinder 600 is unscrewed from the filter bottle body 100, the filter bottle cap 200 is not unscrewed, so that the filter bottle body 100 and the filter bottle cap 200 are separated from the mounting cylinder 600 together, and the filter element is convenient to replace or maintain independently.

Further, referring to fig. 13 to 15, the outer wall of the filter bottle 100 is provided with a first insertion portion 150, the other end of the limiting member 500 is provided with a second insertion portion 540, and the other end of the limiting member 500 is inserted and matched with the filter bottle 100 through the first insertion portion 150 and the second insertion portion 540 to limit and match. Thus, the insertion and engagement of the first insertion portion 150 and the second insertion portion 540 prevents the limiting member 500 from falling off along the other end of the filter bottle body 100 opposite to the inlet end, and further limits the limiting member 500 on the filter bottle body 100, thereby limiting the filter bottle body 100 from separating along the opening end 120 to open the opening 122.

Alternatively, the first mating part 150 may be a second mating protrusion, and the second mating part 540 may be a second mating groove.

Based on any of the above embodiments, referring to fig. 16 and 17, the filter element structure 10 further includes an inner core 700, the inner core 700 includes a filter material 710 and an inner cylinder 720, the filter material 710 is detachably installed in the inner cylinder 720, and the inner cylinder 720 is detachably installed in the installation cavity 110. Thus, when the filter material 710 is used, the inner cylinder 720 can be detachably mounted in the mounting cavity 110, and when the filter material 710 is used for a certain time, the inner cylinder 720 can be detached from the mounting cavity 110. Because filter media 710 and inner tube 720 are detachable and are connected, so, directly dismantle filter media 710 from the inner tube 720 in get off and wash, install in the inner tube 720 after the washing finishes again, then install inner tube 720 in installation cavity 110 again to avoid changing the whole inner core 700 that contains filter media 710, reduced the replacement cost.

Specifically, referring to fig. 16, 18 and 19, the filter material 710 includes a filter material body 712 and a mounting frame 714 fixedly connected to the filter material body 712, the mounting frame 714 is provided with a fifth limiting portion 7142, the inner wall of the inner cylinder 720 is provided with a sixth limiting portion 722, and when the filter material body 712 is inserted into the inner cylinder 720, the mounting frame 714 is in limiting fit with the sixth limiting portion 722 through the fifth limiting portion 7142 so that the filter material 710 is in limiting arrangement in the inner cylinder 720.

Optionally, referring to fig. 18 and fig. 19, in one embodiment, the fifth limiting portion 7142 is a limiting notch, a limiting step that is in limiting fit with the limiting notch is disposed at the inlet and outlet of the inner cylinder 720 on the inner wall of the inner cylinder 720, and the sixth limiting portion 722 is a limiting step, and when the filter material body 712 is inserted into the inner cylinder 720, the limiting step is in limiting fit with the limiting notch. Thus, the filter material 710 can be placed on the inner cylinder 720 by matching the limiting step with the limiting notch. Wherein, the spacing breach just matches with the step form of spacing step.

Further, when the filter material 710 is provided with a limiting step at the inlet and outlet of the inner cylinder 720, referring to fig. 18, the mounting frame 714 is further provided with a seventh limiting portion 716, and the seventh limiting portion 716 and the fifth limiting portion 7142 are arranged at intervals along the insertion direction of the mounting frame 714; referring to fig. 19, the inner wall of the inner cylinder 720 is further provided with an eighth limiting portion 724, and the eighth limiting portion 724 and the sixth limiting portion 722 are disposed at intervals along the depth direction of the inner cylinder 720; when the fifth limiting portion 7142 and the sixth limiting portion 722 are in limiting engagement, the mounting bracket 714 is in limiting engagement with the seventh limiting portion 716 and the eighth limiting portion 724 to limit the rotation of the mounting bracket 714 relative to the inner cylinder 720. Specifically, the timing of the limit fit between the seventh limit portion 716 and the eighth limit portion 724 may be: when the limit step is passed and the limit notch is in limit fit, the seventh limit portion 716 is in limit fit with the eighth limit portion 724 instantly; or when the limit matching between the limit step and the limit notch is passed, the filtering material 710 and the inner cylinder 720 are driven to rotate relatively, and when the filtering material 710 or the inner cylinder 720 rotates to a preset position, the seventh limit portion 716 is in limit matching with the eighth limit portion 724.

Optionally, referring to fig. 18, in one embodiment, the seventh limiting portion 716 includes a sixth limiting protrusion 7162, and the sixth limiting protrusion 7162 is provided with a limiting groove 7164; referring to fig. 19, the eighth limiting portion 724 includes a seventh limiting protrusion 7242, an eighth limiting protrusion 7244 and a ninth limiting protrusion 7246, the seventh limiting protrusion 7242 extends along the insertion direction of the inner tube 720, the eighth limiting protrusion 7244 extends along the circumferential direction of the inner tube 720, the seventh limiting protrusion 7242 and the eighth limiting protrusion 7244 are connected and surround to form a second mounting space 726, and the ninth limiting protrusion 7246 is disposed in the second mounting space 726.

Referring to fig. 20 and 21, when the fifth limiting portion 7142 and the sixth limiting portion 722 are in limiting engagement, the mounting frame 714 and the inner cylinder 720 can rotate relatively to limit the sixth limiting protrusion 7162 to be mounted in the second mounting space 726 and to be in limiting engagement with the seventh limiting protrusion 7242 and the eighth limiting protrusion 7244, and the ninth limiting protrusion 7246 is mounted in the limiting groove 7164. Thus, the mounting frame 714 and the inner cylinder 720 will not rotate relatively, and the filter 710 can be fixed in the inner cylinder 720. When the filter 710 needs to be cleaned, the mounting frame 714 and the inner cylinder 720 are driven to rotate in the opposite direction, so that the ninth limiting protrusion 7246 is separated from the limiting groove 7164, the sixth limiting protrusion 7162 is separated from the second mounting space 726, and the mounting frame 714 is pulled out of the inner cylinder 720.

In addition, an embodiment still relates to a purifier, includes the filter core structure 10 in any above-mentioned embodiment.

When the water purifier is used, the filter element is installed in the installation cavity 110, and at the moment, the end cover 300 is driven to extend into the installation cavity 110 along the opening 122 by driving the filter bottle cap 200 to move relative to the opening end 120 along the direction sleeved on the opening end 120, so that the filter element is packaged in the installation cavity 110; when the filter element needs to be replaced, the filter bottle cap 200 is driven to move relative to the open end 120 along the direction of withdrawing from the open end 120 and drive the end cover 300 to move along the opening 122, at the moment, the opening 122 is opened, a user can take out the inner core 700 along the installation cavity 110 for replacement, the use is convenient, the whole filter element structure 10 does not need to be discarded when the inner core 700 reaches the service life, and then the replacement cost can be saved.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only represent some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (23)

1. A filter cartridge arrangement, comprising:

the filter flask body is internally provided with an installation cavity and comprises an opening end, and the opening end is provided with an opening communicated with the installation cavity;

the filter bottle cover is provided with an accommodating cavity, and the filter bottle cover is sleeved at the opening end through the accommodating cavity; and

the end cover is used for plugging the opening and connected to the inner wall of the accommodating cavity;

the filter bottle cover can move relative to the filter bottle body, and when the filter bottle cover is in a first state, the filter bottle cover moves relative to the opening end along the direction sleeved on the opening end so as to drive the end cover to extend into the first state of the installation cavity along the opening; when the filter bottle cover is in the second state, the filter bottle cover moves relative to the opening end along the direction of withdrawing the opening end and drives the end cover to withdraw from the second state of the mounting cavity along the opening.

2. The filter cartridge arrangement of claim 1, further comprising a connector by which the end cap is movably connected to an inner wall of the receiving cavity;

when the filter bottle cap is in a first state, the filter bottle cap moves relative to the opening end along the direction sleeved on the opening end, and the filter bottle cap pushes the end cover to extend into the mounting cavity along the opening through the inner wall of the accommodating cavity;

when the filter bottle cover is in a second state, the filter bottle cover moves relative to the opening end along the direction of withdrawing from the opening end, and the filter bottle cover pulls the end cover through the connecting piece to withdraw from the mounting cavity along the opening.

3. The filter cartridge arrangement of claim 2, wherein an inner wall of the receiving cavity is rotatably coupled to the filter bottle body.

4. The filter cartridge arrangement of claim 3, wherein the inner wall of the receiving cavity is provided with a first thread arrangement and the outer wall of the open end is provided with a second thread arrangement that threadedly mates with the first thread arrangement.

5. The filter cartridge arrangement according to claim 4, wherein the filter cartridge body has an outer diameter D and the first thread arrangement has a pitch D, wherein D is 0.04D or more and 0.08D or less.

6. The filter cartridge arrangement of claim 4, wherein the first thread arrangement is provided with a first thread stop and the second thread arrangement is provided with a second thread stop that is stop-fit with the first thread stop.

7. The filter element structure as claimed in claim 6, wherein the starting end of the second thread structure comprises a spiral protrusion, the end surface of the spiral protrusion is the second thread stop, the end of the first thread structure is provided with a spiral groove for spirally matching with the spiral protrusion, and the end surface of the spiral groove is the first thread stop for limit matching with the spiral protrusion.

8. The filter cartridge arrangement of any one of claims 2 to 7, wherein the filter cap includes a mounting body fixedly secured to an inner wall of the cavity, the end cap having first and second oppositely disposed mounting surfaces, the end cap further having mounting apertures extending through the first and second mounting surfaces, the first mounting surface being closer to the bottom wall of the cavity than the second mounting surface;

the mounting body is movably inserted into the mounting hole from one side of the first mounting surface, one end of the connecting piece extends into the mounting hole along one side of the second mounting surface and is connected with the mounting body, and the other end of the connecting piece is in limit fit with the inner wall of the mounting hole or the second mounting surface.

9. A filter element arrangement as claimed in claim 8, wherein the bottom wall of the cavity is formed with a support portion for supporting the first mounting face.

10. The filter cartridge arrangement of claim 8, wherein the connector comprises a screw, one end of the screw is connected to the mounting body, and the other end of the screw is in limit fit with the inner wall of the mounting hole.

11. The filter element structure as claimed in claim 8, wherein the inner wall of the mounting hole is formed with a first limiting protrusion, the first limiting protrusion comprises a first limiting surface facing the second mounting surface, the height of the first limiting surface from the first mounting surface is smaller than the length of the mounting body, and the other end of the connecting piece is in limiting fit with the first limiting surface;

when the filter bottle cover is in a first state, the filter bottle cover moves relative to the opening end along the direction sleeved on the opening end, and the filter bottle cover pushes the end cover to extend into the mounting cavity along the opening through the contact fit of the inner wall of the accommodating cavity and the first mounting surface;

when the filter bottle cap is in a second state, the filter bottle cap moves relative to the open end in the direction of withdrawing from the open end, and the filter bottle cap pulls the end cover to withdraw from the installation cavity along the opening through the contact fit of the other end of the connecting piece and the first limiting surface.

12. The filter cartridge arrangement according to claim 11, wherein the first stopper surface is formed with an abutment projection for abutment with the connector, the abutment projection having a height from the first mounting surface smaller than the length of the mounting body.

13. The filter element structure according to claim 11, further comprising a first sealing ring, wherein the mounting body comprises an insertion portion and a boss, the boss is fixedly disposed on the bottom wall of the accommodating cavity, the insertion portion is fixedly disposed on the boss, the boss protrudes from a circumferential side wall of the insertion portion, the first limiting protrusion further comprises a second limiting surface disposed opposite to the first limiting surface, when the insertion portion is inserted into the mounting hole, the second limiting surface and the boss are spaced to form a first mounting space, and the first sealing ring is sleeved on the insertion portion and is hermetically disposed in the first mounting space.

14. The filter cartridge arrangement of claim 1, further comprising a retaining member, one end of the retaining member being connected to the filter cartridge cap and the other end of the retaining member being in retaining engagement with the filter cartridge body to limit separation of the filter cartridge cap from the open end to open the opening.

15. The filter cartridge arrangement of claim 14, wherein the filter cartridge body has a first and a second spacing portion spaced apart along a length of the filter cartridge body, the first and second spacing portions being spaced apart from the filter cartridge cap, the first spacing portion being closer to the filter cartridge cap than the second spacing portion;

the limiting piece is sleeved on the filter flask body, one end of the limiting piece is provided with a first connecting part used for being connected with the filter flask cover, the other end of the limiting piece is provided with a third limiting part used for being in limiting fit with the first limiting part and the second limiting part, and the limiting piece can move between the second limiting part and the third limiting part through the limiting fit of the third limiting part and the first limiting part and the second limiting part;

when the limiting part moves along the direction from the second limiting part to the first limiting part, the filter flask cover is connected with the first connecting part and connected with the filter flask cover.

16. The filter element structure according to claim 15, wherein the limiting member is a limiting ring, the inner wall of the limiting member is formed with the third limiting portion, the third limiting portion comprises a limiting buckle, a second limiting protrusion and a third limiting protrusion, the second limiting protrusion and the third limiting protrusion are arranged at intervals along the circumferential direction of the limiting member, the limiting buckle is arranged between the second limiting protrusion and the third limiting protrusion, and the limiting buckle, the second limiting protrusion and the third limiting protrusion are all installed between the first limiting portion and the second limiting portion in a limiting manner;

the limiting buckle is in limiting fit with the first limiting part, the second limiting protrusion and/or the third limiting protrusion is in limiting fit with the second limiting part, and the first limiting part is in limiting installation between the second limiting protrusion and the third limiting protrusion.

17. The filter cartridge arrangement of claim 15, wherein the first connector is a first mating projection and the filter cap is provided with a first mating groove that mates with the first mating projection.

18. The filter element structure according to any one of claims 15 to 17, further comprising an installation cylinder, wherein the filter bottle body is inserted into the installation cylinder, the inner wall of the installation cylinder is provided with a fourth limiting portion, when the filter bottle assembly extends into the installation cylinder, the fourth limiting portion is in limiting fit with the limiting member, and pushes the limiting member to move the filter bottle cap along the direction from the second limiting portion to the first limiting portion so as to connect the first connection portion with the filter bottle cap.

19. The filter element structure according to claim 14, wherein one end of the limiting member is provided with a second connecting portion, the filter bottle cap is provided with a third connecting portion snap-fitted with the second connecting portion, and the limiting member is snap-fitted with the filter bottle cap through the second connecting portion and the third connecting portion.

20. The filter element structure according to claim 19, wherein the limiting member is a limiting ring, the second connecting portion is disposed on an inner wall of the limiting ring, the second connecting portion includes a buckle, a fourth limiting protrusion and a fifth limiting protrusion, the fourth limiting protrusion and the fifth limiting protrusion are spaced apart from each other along a circumferential direction of the limiting member, and the buckle is disposed between the fourth limiting protrusion and the fifth limiting protrusion;

the third connecting portion are protruding, the buckle with protruding joint cooperation of card, just protruding spacing the installing of card in the fourth spacing arch with between the fifth spacing arch.

21. The filter cartridge assembly of claim 19, wherein the outer wall of the filter cartridge body is provided with a first insertion portion, the other end of the limiting member is provided with a second insertion portion, and the other end of the limiting member is engaged with the filter cartridge body in a limiting manner through the insertion engagement of the first insertion portion and the second insertion portion.

22. The filter element structure of claim 1, further comprising an inner core, wherein the inner core comprises a filter element and an inner cylinder, the filter element is detachably mounted in the inner cylinder, and the inner cylinder is detachably mounted in the mounting cavity.

23. A water purification machine comprising a filter cartridge arrangement according to any one of claims 1 to 22.

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