CN219518029U - Filter element assembly - Google Patents

Abstract

The utility model discloses a filter element assembly, which comprises: the waterway plate is provided with a first limiting part; the filter element comprises a filter element main body, wherein a second limiting part is arranged on the filter element main body, one of the first limiting part and the second limiting part is a limiting protrusion, the other one is a limiting groove, the limiting protrusion and the limiting groove are slidably in limiting fit, the limiting groove is provided with a first position and a second position, the limiting groove comprises a return groove and a withdrawal groove which are communicated with each other, the limiting protrusion slides unidirectionally in the direction from the starting point of the withdrawal groove to the end point of the withdrawal groove in the process from the first position to the second position, and the limiting protrusion slides unidirectionally in the direction from the starting point of the return groove to the end point of the return groove in the process from the second position to the first position. From this, can prevent that spacing arch from sliding in the spacing groove in the opposite direction, cause unable normal installation of water route board and filter core main part or dismantle to can promote the reliability of water route board and filter core main part installation or dismantlement operation.

Description

Filter element assembly

Technical Field

The utility model relates to the technical field of water purifiers, in particular to a filter element assembly.

Background

Along with the development of technology and the improvement of health consciousness of people, the water purifier is widely used. The general water purifier is provided with the filter core, and the filter core can carry out the depth filtration to water, provides comparatively clean domestic water for people to protect people's health better. When the filter element is used for a period of time, the filter element is easy to be blocked due to accumulation of pollutants, and the filter element needs to be replaced at the moment in order to ensure the water inlet and outlet effect and the filtering capacity.

In the prior art, the filter core is generally connected with the waterway plate, because the structure of the filter core and the waterway plate is complex, if the design of the connection structure between the filter core and the waterway plate is not reasonable enough, the difficulty of installing the filter core on the waterway plate or detaching the filter core from the waterway plate is large, and the structure of the filter core or the waterway plate is possibly damaged, so that the problem of lower reliability and convenience of disassembly and assembly exists, and the use experience of a user is lower.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the filter element assembly, and the filter element body of the filter element assembly is simpler and more reliable to install and detach.

A filter element assembly according to an embodiment of the utility model comprises: the water channel plate is provided with a first limiting part; the filter element comprises a filter element main body, wherein a second limiting part is arranged on the filter element main body, one of the first limiting part and the second limiting part is a limiting protrusion, the other limiting part is a limiting groove, the limiting protrusion is in sliding limiting fit with the limiting groove, the limiting groove is provided with a first position and a second position, when the limiting protrusion is positioned at the first position, the waterway plate is fixedly connected with the filter element main body, when the limiting protrusion is positioned at the second position, the waterway plate is disconnected with the filter element main body, the limiting groove comprises a return groove and an exit groove which are mutually communicated, wherein the first position is positioned between the starting point of the exit groove and the ending point of the return groove, the second position is positioned between the ending point of the exit groove and the starting point of the return groove, in the process from the first position to the second position, the limiting protrusion slides unidirectionally in the direction from the starting point of the exit groove to the ending point of the exit groove, and in the process from the second position to the ending point of the return groove.

Therefore, the limiting protrusion can be prevented from sliding reversely in the limiting groove by sliding unidirectionally in the direction from the starting point of the withdrawing groove to the ending point of the withdrawing groove and in the direction from the starting point of the return groove to the ending point of the return groove, so that the waterway plate and the filter element main body cannot be normally installed or detached, and the reliability of the installation or detachment operation of the waterway plate and the filter element main body can be improved.

According to some embodiments of the utility model, the limiting protrusion comprises an elastic piece and a protruding thimble, and the protruding thimble is arranged at one end of the elastic piece and is elastically in limiting fit with the limiting groove.

According to some embodiments of the utility model, the return groove comprises a first groove section, a second groove section and a third groove section, the first groove section, the second groove section and the third groove section are sequentially communicated, the first groove section extends in a first direction, the second groove section obliquely extends towards one side of the first direction, the third groove section obliquely extends towards one side of the second direction away from the first groove section, and the limiting protrusion slides in the first groove section, the second groove section and the third groove section in a unidirectional manner in sequence in the process from the second position to the first position, wherein the first direction is the detachment direction of the filter element main body, and the second direction is the installation direction of the filter element main body.

According to some embodiments of the utility model, the groove bottom height of the first groove section increases gradually in the first direction, the groove bottom height of the second groove section is unchanged, the groove bottom height of the third groove section increases gradually in a direction away from the second groove section, and the second groove section falls down to the third groove section to form a first step.

According to some embodiments of the utility model, the third groove section comprises a first portion and a second portion, the first portion being in communication with the second groove section and having a gradually increasing groove bottom height in a direction away from the second groove section, the second portion being in communication with the first portion and having a constant groove bottom height.

According to some embodiments of the utility model, the exit slot comprises a fourth slot section, a fifth slot section and a sixth slot section, wherein the third slot section, the fourth slot section, the fifth slot section and the sixth slot section are sequentially communicated, the fourth slot section extends obliquely towards one side of the first direction away from the third slot section, the fifth slot section extends in the second direction, the sixth slot section extends obliquely towards one side of the second direction close to the first slot section, and the limiting protrusion slides unidirectionally in the fourth slot section, the fifth slot section and the sixth slot section sequentially in the process from the first position to the second position.

According to some embodiments of the utility model, the groove bottom height of the fourth groove section increases gradually in a direction away from the third groove section, the groove bottom height of the fifth groove section increases gradually in the second direction, the groove bottom height of the sixth groove section increases gradually in a direction away from the fifth groove section, and the fourth groove section falls down to the fifth groove section to form a second step.

According to some embodiments of the utility model, the fourth groove section comprises a third portion and a fourth portion, the third portion and the third groove section being in communication and the groove bottom height in a direction away from the third groove section gradually increasing, the fourth portion being in communication with the third portion, the fourth portion being of constant height.

According to some embodiments of the utility model, the third groove section is formed with a third step down to the fourth groove section, and the sixth groove section is formed with a fourth step down to the first groove section.

According to some embodiments of the utility model, the waterway board comprises a waterway board body and a connection turntable, the connection turntable is rotatably arranged on the waterway board body, the first limiting part is arranged on the connection turntable, and the connection turntable is rotatable relative to the waterway board body in the limiting cooperation process of the first limiting part and the second limiting part.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

FIG. 1 is a schematic illustration of a filter cartridge assembly according to an embodiment of the present utility model;

FIG. 2 is an exploded view of a filter cartridge assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a cartridge body according to an embodiment of the present utility model;

FIG. 4 is a schematic view of area A of FIG. 3;

fig. 5 is a schematic view of an elastic member according to an embodiment of the present utility model.

Reference numerals:

100. a filter element assembly;

10. a waterway plate; 11. a waterway plate body; 12. the connecting turntable; 121. a first limit part; 1211. an elastic member; 1212. a protruding thimble;

20. a cartridge body; 21. a second limit part; 211. a first position; 212. a second position; 213. a return groove; 2131. a first trough section; 2132. a second trough section; 2133. a third trough section; 21331. a first portion; 21332. a second portion; 214. a withdrawal slot; 2141. a fourth trough section; 21411. a third section; 21412. a fourth section; 2142. a fifth trough section; 2143. a sixth slot section; 215. a first step; 216. a second step; 217. a third step; 218. and a fourth step.

Detailed Description

Embodiments of the present utility model will be described in detail below, by way of example with reference to the accompanying drawings.

A filter cartridge assembly 100 according to an embodiment of the present utility model is described below with reference to fig. 1-5.

As shown in connection with fig. 1-5, a filter cartridge assembly 100 according to an embodiment of the present utility model may generally include: the waterway plate 10 and the filter element main body 20, wherein the waterway plate 10 is provided with a first limiting part 121, the filter element main body 20 is provided with a second limiting part 21, one of the first limiting part 121 and the second limiting part 21 is a limiting protrusion, the other is a limiting groove, the limiting protrusion and the limiting groove are slidably in limiting fit, the limiting groove is provided with a first position 211 and a second position 212, when the limiting protrusion is positioned at the first position 211, the waterway plate 10 and the filter element main body 20 are fixedly connected, when the limiting protrusion is positioned at the second position 212, the waterway plate 10 and the filter element main body 20 are disconnected,

specifically, through setting up first spacing portion 121 on water route board 10, set up second spacing portion 21 on filter core main part 20, and set up as spacing protruding with one of first spacing portion 121 and second spacing portion 21, another is set up as the spacing groove, can make spacing protruding selectively be located the first position 211 or the second position 212 of spacing groove through the spacing cooperation between spacing protruding and the spacing groove, when spacing groove is in first position 211, can connect fixedly between water route board 10 and the filter core main part 20, water can flow between water route board 10 and the filter core, thereby can guarantee filter core assembly 100 to the purification of water, guarantee the normal work of filter core assembly 100, when spacing groove is in second position 212, can disconnect between water route board 10 and the filter core main part 20, can dismantle filter core main part 20 from water route board 10, thereby can conveniently change filter core main part 20, guarantee the water inlet effect and the water purification ability of filter core assembly 100.

As shown in connection with fig. 2-4, the limit groove may include a return groove 213 and an exit groove 214 that are in communication with each other, wherein the first position 211 is located between a start point of the exit groove 214 and an end point of the return groove 213, the second position 212 is located between an end point of the exit groove 214 and a start point of the return groove 213, the limit protrusion unidirectionally slides in a direction from the start point of the exit groove 214 to the end point of the exit groove 214 during a process from the first position 211 to the second position 212, and the limit protrusion unidirectionally slides in a direction from the start point of the return groove 213 to the end point of the return groove 213 during a process from the second position 212 to the first position 211.

Specifically, the start point of the withdrawal slot 214 is communicated with the end point of the return slot 213, the end point of the withdrawal slot 214 is communicated with the start point of the return slot 213, the first position 211 is located between the start point of the withdrawal slot 214 and the end point of the return slot 213, the second position 212 is located between the end point of the withdrawal slot 214 and the start point of the return slot 213, when the filter element main body 20 needs to be detached from the waterway plate 10, the filter element main body 20 can be pressed, the limit protrusion is enabled to slide unidirectionally in the direction from the start point of the withdrawal slot 214 to the end point of the withdrawal slot 214, the limit protrusion is switched from the first position 211 to the second position 211, when the filter element main body 20 needs to be detached from the waterway plate 10, the limit protrusion is prevented from sliding unidirectionally in the limit slot, and the filter element main body 20 is enabled to be detached from the waterway plate 10, or the filter element main body 20 can be detached from the waterway plate 10 accurately and safely, and the filter element main body 20 can be detached from the waterway plate 100 reliably, and the filter element main body can be further reliably and the waterway assembly can be lifted by the user.

Thus, by making the stopper protrusion unidirectionally slide in both the direction from the start point of the withdrawal groove 214 to the end point of the withdrawal groove 214 and the direction from the start point of the return groove 213 to the end point of the return groove 213, the stopper protrusion can be prevented from reversely sliding in the stopper groove, causing the waterway plate 10 and the cartridge body 20 to be unable to be normally mounted or dismounted, and thus the reliability of the mounting or dismounting operation of the waterway plate 10 and the cartridge body 20 can be improved.

As shown in fig. 5, the limiting protrusion may include an elastic element 1211 and a protruding thimble 1212, where the protruding thimble 1212 is disposed at one end of the elastic element 1211 and is elastically and limitedly matched with the limiting groove. Specifically, through setting up protruding thimble 1212 in the one end of elastic component 1211, make protruding thimble 1212 and spacing groove elasticity spacing cooperation, like this when spacing protruding in the spacing inslot slides, elastic component 1211 can follow the tank bottom height variation of each position department in the spacing groove and take place elastic deformation, protruding thimble 1212 can contact with the spacing groove all the time to can promote spacing cooperation's between spacing protruding and the spacing groove stability and reliability, can further guarantee the unidirectional slip of spacing protruding in the spacing groove.

As shown in connection with fig. 2-4, the return groove 213 may include a first groove segment 2131, a second groove segment 2132, and a third groove segment 2133, where the first groove segment 2131, the second groove segment 2132, and the third groove segment 2133 are sequentially communicated, the first groove segment 2131 extends in a first direction, the second groove segment 2132 extends obliquely toward one side of the first direction, the third groove segment 2133 extends obliquely toward one side of the second direction away from the first groove segment 2131, and the limit protrusion slides in one direction in the first groove segment 2131, the second groove segment 2132, and the third groove segment 2133 sequentially during a process from the second position 212 to the first position 211, wherein the first direction is a removal direction of the cartridge body 20, and the second direction is an installation direction of the cartridge body 20.

Specifically, the first direction is defined as the disassembly direction of the filter element main body 20, the second direction is defined as the installation direction of the filter element main body 20, the first groove segment 2131 is extended in the first direction, the second groove segment 2132 is extended obliquely towards one side of the first direction, and the third groove segment 2133 is extended obliquely towards one side of the second direction away from the first groove segment 2131, so that the filter element main body 20 is installed on the waterway plate 10, the filter element main body 20 is only required to be pressed along the second direction relative to the waterway plate 10, the limiting protrusion can enter the second position 212, then slides unidirectionally in the first groove segment 2131, the second groove segment 2132 and the third groove segment 2133 in sequence, so that the first position 211 is entered, the fixed connection between the filter element main body 20 and the waterway plate 10 is realized, the unidirectional sliding of the limiting protrusion in the return groove 213 can be ensured, the structural design of the return groove 213 can be optimized, the sliding track of the limiting protrusion in the return groove 213 is more reasonable, and the sliding of the limiting protrusion in the return groove 213 is smoother.

Further, as shown in conjunction with fig. 2 to 4, the groove bottom height of the first groove segment 2131 is gradually increased in the first direction, the groove bottom height of the second groove segment 2132 is unchanged, the groove bottom height of the third groove segment 2133 is gradually increased in the direction away from the second groove segment 2132, and the second groove segment 2132 falls down toward the third groove segment 2133 to form the first step 215.

Specifically, when the cartridge body 20 is pressed and the cartridge body 20 is mounted on the waterway plate 10, the limiting protrusion slides up to the second groove segment 2132 along the first groove segment 2131, the limiting protrusion can naturally pass through the first step 215 to enter the third groove segment 2133 by making the second groove segment 2132 fall down to form the first step 215, at this time, the pressing force to the cartridge body 20 is removed, and the limiting protrusion can slide to the first position 211 along the third groove segment 2133, so that the limiting protrusion can be prevented from sliding back to the second groove segment 2132, the unidirectional sliding of the limiting protrusion in the return groove 213 can be ensured, and the cartridge body 20 can be more reliably mounted on the waterway plate 10.

Further, by gradually increasing the groove bottom height of the first groove segment 2131 in the first direction, the groove bottom height of the second groove segment 2132 is made constant, and the groove bottom height of the third groove segment 2133 is gradually increased in the direction away from the second groove segment 2132, not only can stability of the stopper protrusion when the second groove segment 2132 slides be ensured, but also on the premise of ensuring that the first step 215 is formed, excessive fall of the groove bottom heights of the first groove segment 2131, the second groove segment 2132 and the third groove segment 2133 is prevented, resulting in lower stability and reliability of the fit between the stopper protrusion and the return groove 213, and thus, sliding of the stopper protrusion in the return groove 213 can be made more stable and smooth.

As shown in connection with fig. 2-4, the third groove segment 2133 may include a first portion 21331 and a second portion 21332, where the first portion 21331 is communicated with the second groove segment 2132 and the groove bottom height in a direction away from the second groove segment 2132 is gradually increased, and the second portion 21332 is communicated with the first portion 21331 and the groove bottom height is unchanged.

As shown in connection with fig. 2-4, the exit slot 214 may include a fourth slot segment 2141, a fifth slot segment 2142, and a sixth slot segment 2143, the third slot segment 2133, the fourth slot segment 2141, the fifth slot segment 2142, and the sixth slot segment 2143 being in communication in sequence, the fourth slot segment 2141 extending obliquely toward a side of the first direction away from the third slot segment 2133, the fifth slot segment 2142 extending in the second direction, the sixth slot segment 2143 extending obliquely toward a side of the second direction closer to the first slot segment 2131, and the stop tab sliding unidirectionally in the fourth slot segment 2141, the fifth slot segment 2142, and the sixth slot segment 2143 in sequence during the transition from the first position 211 to the second position 212.

Specifically, by sequentially connecting the third slot segment 2133, the fourth slot segment 2141, the fifth slot segment 2142, and the sixth slot segment 2143, and by extending the fourth slot segment 2141 obliquely toward the side away from the third slot segment 2133 in the first direction, extending the fifth slot segment 2142 in the second direction, and extending the sixth slot segment 2143 obliquely toward the side closer to the first slot segment 2131 in the second direction, when the cartridge body 20 is detached from the waterway plate 10, only the cartridge body 20 needs to be pressed against the waterway plate 10 in the second direction, the limit protrusions at the first position 211 can slide in the fourth slot segment 2141, the fifth slot segment 2142, and the sixth slot segment 2143 in sequence, so as to enter the second position 212, thereby realizing disconnection between the cartridge body 20 and the waterway plate 10.

Further, as shown in conjunction with fig. 2 to 4, the groove bottom height of the fourth groove section 2141 gradually increases in a direction away from the third groove section 2133, the groove bottom height of the fifth groove section 2142 gradually increases in the second direction, the groove bottom height of the sixth groove section 2143 gradually increases in a direction away from the fifth groove section 2142, and the fourth groove section 2141 drops down toward the fifth groove section 2142 to form the second step 216.

Specifically, when the cartridge body 20 is pressed and the cartridge body 20 is detached from the waterway plate 10, the limiting protrusion can slide obliquely along the fourth groove section 2141 in the first direction relative to the cartridge body 20, the limiting protrusion can naturally pass over the second step 216 to enter the fifth groove section 2142 by making the fourth groove section 2141 fall down to the fifth groove section 2142 to form the second step 216, at this time, the pressing force to the cartridge body 20 is removed, the limiting protrusion can slide to the second position 212 along the fifth groove section 2142 and the sixth groove section 2143, the limiting protrusion can be prevented from sliding reversely to the fourth groove section 2141, thereby ensuring that the limiting protrusion slides unidirectionally in the return groove 213, and ensuring that the cartridge body 20 can be mounted to the waterway plate 10 more reliably.

Further, by gradually increasing the groove bottom height of the fourth groove section 2141 in a direction away from the third groove section 2133 and gradually increasing the groove bottom height of the fifth groove section 2142 in a second direction, on the premise of ensuring the formation of the second step 216, it is possible to prevent the drop of the groove bottom heights of the fourth groove section 2141, the fifth groove section 2142 and the sixth groove section 2143 from being excessively large, resulting in lower stability and reliability of the fit between the stopper protrusion and the escape groove 214, and thus it is possible to make the sliding of the stopper protrusion in the escape groove 214 more stable and smooth.

As shown in fig. 4, the fourth groove section 2141 may include a third portion 21411 and a fourth portion 21412, where the third portion 21411 and the third groove section 2133 are communicated and the groove bottom height of the third portion 2143 is gradually increased in a direction away from the third groove section 2133, the fourth portion 21412 is communicated with the third portion 21411, and the groove bottom height of the fourth portion 21412 is unchanged, so that not only can the drop of the groove bottom height of the fourth groove section 2141 or even the exit groove 214 be further reduced, but also the stability and reliability of the cooperation between the limit protrusion and the exit groove 214 can be improved, and the end of the fourth portion 21412 away from the third portion 21411 and the end of the fifth groove section 2142 close to the fourth groove section 2141 can be formed into a second step 216, the stability of the limit protrusion at the fourth portion 21412 is better, the limit protrusion can more stably cross the second step 216, and the structural design of the fourth groove section 2141 or even the exit groove 214 can be further optimized.

As shown in fig. 4, the third groove segment 2133 falls down toward the fourth groove segment 2141 to form the third step 217, and the sixth groove segment 2143 falls down toward the first groove segment 2131 to form the fourth step 218.

Specifically, the third step 217 is formed by allowing the third groove segment 2133 to fall toward the fourth groove segment 2141, so that after the cartridge body 20 is pressed to connect and fix the cartridge body 20 with the waterway plate 10, the limit protrusion can slide along the return groove 213 with respect to the cartridge body 20 and then naturally pass over the third step 217, so that the limit protrusion is stably located at the first position 211, and when the cartridge body 20 is pressed by a user to disconnect the cartridge body 20 from the waterway plate 10, the third step 217 can prevent the limit protrusion from entering the return groove 213 from the first position 211, ensuring the one-way sliding of the limit protrusion in the return groove 213.

Further, by allowing the sixth groove segment 2143 to drop down toward the first groove segment 2131 to form the fourth step 218, after the cartridge body 20 is pressed to detachably connect the cartridge body 20 with the waterway plate 10, the limiting protrusion can slide along the withdrawal groove 214 with respect to the cartridge body 20 and then naturally pass over the fourth step 218, so that the limiting protrusion is located at the second position 212, and when the user presses the cartridge body 20 to fixedly connect the cartridge body 20 with the waterway plate 10, the fourth step 218 can prevent the limiting protrusion from entering the withdrawal groove 214 from the second position 212, thereby ensuring the one-way sliding of the limiting protrusion in the return groove 213.

By means of the arrangement, one-way sliding of the limiting protrusion in the limiting groove can be further guaranteed, and the reliability of connection or disconnection operation of the waterway plate 10 and the filter element main body 20 can be further improved, so that the structural reliability of the filter element assembly 100 can be further improved.

Referring to fig. 1 and 2, the waterway board 10 may include a waterway board body 11 and a connection turntable 12, where the connection turntable 12 is rotatably disposed on the waterway board body 11, and a first limiting portion 121 is disposed on the connection turntable 12, and the connection turntable 12 is rotatable relative to the waterway board body 11 during a process of limiting cooperation between the first limiting portion 121 and the second limiting portion 21. Specifically, considering that the first limiting portion 121 and the second limiting portion 21 are in the process of limiting cooperation, the connection turntable 12 not only can slide in the first direction and the second direction relative to the filter element body 20, but also can slide in the circumferential direction relative to the filter element body 20, the connection turntable 12 is rotatably arranged on the waterway plate body 11, the first limiting portion 121 is arranged on the connection turntable 12, and thus when the filter element body 20 is pressed, the filter element body 20 and the waterway plate 10 are connected or disconnected, the filter element body 20 and the connection turntable 12 can rotate relatively, and the connection turntable 12 can rotate relative to the waterway plate body 11, so that a user only needs to press the filter element body 20, can install the filter element body 20 on the waterway plate 10 or detach the filter element body from the waterway plate 10 without applying circumferential acting force, the filter element body 20 can be conveniently replaced, the operation of the user can be simpler and more labor-saving, and the use experience of the user can be improved.

In the description of the present utility model, it should 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", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A filter cartridge assembly (100), comprising:

the water channel plate (10), the water channel plate (10) is provided with a first limit part (121);

the filter element main body (20), a second limiting part (21) is arranged on the filter element main body (20), one of the first limiting part (121) and the second limiting part (21) is a limiting protrusion, the other is a limiting groove, the limiting protrusion and the limiting groove are slidably in limiting fit,

the limiting groove is provided with a first position (211) and a second position (212), when the limiting protrusion is positioned at the first position (211), the waterway plate (10) is fixedly connected with the filter element main body (20), when the limiting protrusion is positioned at the second position (212), the waterway plate (10) is disconnected with the filter element main body (20),

the limiting groove comprises a return groove (213) and an exit groove (214) which are communicated with each other, wherein,

the first position (211) is located between the start point of the exit groove (214) and the end point of the return groove (213), the second position (212) is located between the end point of the exit groove (214) and the start point of the return groove (213), and the limit protrusion unidirectionally slides in a direction from the start point of the exit groove (214) to the end point of the exit groove (214) in a process from the first position (211) to the second position (212), and the limit protrusion unidirectionally slides in a direction from the start point of the return groove (213) to the end point of the return groove (213) in a process from the second position (212) to the first position (211).

2. The filter cartridge assembly (100) of claim 1, wherein the limit projection comprises an elastic member (1211) and a projection pin (1212), the projection pin (1212) being disposed at one end of the elastic member (1211) and being in elastic limit fit with the limit slot.

3. The filter cartridge assembly (100) of claim 1, wherein the return groove (213) comprises a first groove segment (2131), a second groove segment (2132) and a third groove segment (2133), the first groove segment (2131), the second groove segment (2132) and the third groove segment (2133) being in communication in sequence, the first groove segment (2131) extending in a first direction, the second groove segment (2132) extending obliquely to one side of the first direction, the third groove segment (2133) extending obliquely to one side of the second direction away from the first groove segment (2131), the limiting protrusion sliding in sequence in the first groove segment (2131), the second groove segment (2132) and the third groove segment (2133), wherein the first direction is the removal direction of the filter cartridge body (20) and the third groove segment (2133) extends obliquely to one side of the second direction away from the first groove segment (2131) from the second position (212) to the first position (211).

4. The filter cartridge assembly (100) of claim 3 wherein the trough bottom height of the first trough section (2131) increases gradually in the first direction, the trough bottom height of the second trough section (2132) does not change, the trough bottom height of the third trough section (2133) increases gradually in a direction away from the second trough section (2132),

and, the second groove section (2132) falls to the third groove section (2133) to form a first step (215).

5. The filter cartridge assembly (100) of claim 4, wherein the third groove segment (2133) includes a first portion (21331) and a second portion (21332), the first portion (21331) being in communication with the second groove segment (2132) and a groove bottom height gradually increasing in a direction away from the second groove segment (2132), the second portion (21332) being in communication with the first portion (21331) and the groove bottom height being constant.

6. The filter element assembly (100) of claim 3, wherein the exit slot (214) comprises a fourth slot segment (2141), a fifth slot segment (2142), and a sixth slot segment (2143), the third slot segment (2133), the fourth slot segment (2141), the fifth slot segment (2142), and the sixth slot segment (2143) being in communication in sequence, the fourth slot segment (2141) extending obliquely toward a side of the first direction away from the third slot segment (2133), the fifth slot segment (2142) extending in the second direction, the sixth slot segment (2143) extending obliquely toward a side of the second direction toward the first slot segment (2131), the stop tab sliding unidirectionally in the fourth slot segment (2141), fifth slot segment (2142), and sixth slot segment (2143) in sequence from the first position (211) to the second position (212).

7. The filter cartridge assembly (100) of claim 6 wherein the trough bottom height of the fourth trough section (2141) increases gradually in a direction away from the third trough section (2133), the trough bottom height of the fifth trough section (2142) increases gradually in the second direction, the trough bottom height of the sixth trough section (2143) increases gradually in a direction away from the fifth trough section (2142),

and, the fourth groove section (2141) is formed with a second step (216) falling down to the fifth groove section (2142).

8. The filter element assembly (100) of claim 7, wherein the fourth channel segment (2141) includes a third portion (21411) and a fourth portion (21412), the third portion (21411) and the third channel segment (2133) being in communication and a channel bottom height in a direction away from the third channel segment (2133) being progressively increasing, the fourth portion (21412) being in communication with the third portion (21411), the height of the fourth portion (21412) being constant.

9. The filter cartridge assembly (100) of claim 6, wherein the third groove segment (2133) is formed with a third step (217) that drops toward the fourth groove segment (2141), and the sixth groove segment (2143) is formed with a fourth step (218) that drops toward the first groove segment (2131).

10. The filter element assembly (100) according to claim 1, wherein the waterway plate (10) comprises a waterway plate body (11) and a connecting turntable (12), the connecting turntable (12) is rotatably arranged on the waterway plate body (11), the first limiting portion (121) is arranged on the connecting turntable (12), and the connecting turntable (12) is rotatable relative to the waterway plate body (11) in the process of limiting cooperation of the first limiting portion (121) and the second limiting portion (21).