Filter element assembly

The design of sliders and elastic components simplifies the installation and removal of water purifier filter cartridges, solving the problems of easy damage to the water circuit board and complicated operation when using screw-type cartridge replacement, thus improving user experience and safety.

CN223732275UActive Publication Date: 2025-12-30NINGBO FOTILE KITCHEN WARE CO LTD
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Patent Information

Application Number
CN202520064096.1
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-01-11
Publication Date
2025-12-30
Estimated Expiration
2035-01-11

AI Technical Summary

Technical Problem

Traditional water purifier filter cartridges have a screw-on replacement mechanism that is prone to deformation and damage to the water circuit board, poses a high risk of leakage, and is complicated to operate, making it inconvenient for users to replace the cartridges.

Method used

The design incorporates a slider and elastic element. The slider slides within the groove, and the locking element is used to lock and unlock the filter element, simplifying the installation and disassembly process.

Benefits of technology

The installation and removal of the filter element are made smoother, the risk of leakage is reduced, structural damage is avoided, and the operation is more convenient for users.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model provides a filter element assembly and relates to the technical field of water purifiers. The filter element assembly comprises a filter element body, a waterway plate, a sliding block, a sliding groove and an elastic piece. One of the sliding block and the sliding groove is fixed to the filter element body, the other one of the sliding block and the sliding groove is fixed to the waterway plate, the sliding block can slide in the sliding groove, one end of the elastic piece is fixed to the sliding groove, the other end of the elastic piece can be attached to the sliding block, and the elastic force direction of the elastic piece is consistent with the moving direction of the filter element body. The filter element assembly further comprises a locking piece, a locking part is arranged on the sliding block, the locking piece is elastically connected to the sliding groove, and the locking piece can be connected with or disengaged from the locking part. The filter element body is arranged to be capable of moving between a locking position and an unlocking position, when the filter element body is located at the locking position, the locking piece is connected to the locking part, and when the filter element body is located at the unlocking position, the locking piece is separated from the locking part. A user can mount and dismount the filter element more conveniently, the risk of water leakage is reduced, and structural damage is not likely to be caused.
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Description

TECHNICAL FIELD

[0001] The utility model relates to water purifier technical field, especially relate to a filter element assembly. BACKGROUND

[0002] The traditional water purifier filter element's core structure is screwing type, fixes through the rotation structure of filter element bottom and water route board, needs the water inlet and outlet of filter element to aim at water route board and carries out the rotation, is easy to cause water route board deformation damage in the rotation process, and the connecting place of filter element and water route board is easy to dislocate after the frequent use, has the risk of water leakage. SUMMARY

[0003] The utility model solves the technical problem that the prior art water purifier filter element is easy to cause structural damage, has a large water leakage risk and is inconvenient to replace the filter element, and provides a filter element assembly.

[0004] The utility model solves the above technical problem through the following technical scheme:

[0005] The utility model provides a filter element assembly, the filter element assembly includes filter element body, water route board, sliding block, sliding slot and elastic part,

[0006] One of the sliding block and the sliding slot is fixed on the filter element body, and the other is fixed on the water route board, the sliding block can slide in the sliding slot, one end of the elastic part is fixed in the sliding slot, the other end of the elastic part can be attached with the sliding block, the elastic force direction of the elastic part is consistent with the movement direction of the filter element body,

[0007] The filter element assembly further includes a locking member, the sliding block is provided with a locking portion, the locking member is elastically connected to the sliding slot, and the locking member can be connected or separated from the locking portion.

[0008] The filter element body is arranged to be movable between a locked position and an unlocked position, when the filter element body is in the locked position, the locking member is connected to the locking portion, and when the filter element body is in the unlocked position, the locking member is separated from the locking portion.

[0009] In the present scheme, the filter core body is arranged to be movable between a locked position and an unlocked position. When the user needs to install the filter core body, the user presses the filter core body to move the filter core body to the locked position, when the filter core body is in the locked position, the locking member is connected to the locking portion, and then the sliding block is fixed to the sliding groove, so that the filter core body is fixed to the waterway plate, and the installation of the filter core is realized. At this time, the elastic member arranged between the sliding block and the sliding groove is compressed. When the user needs to disassemble the filter core body, the user presses the filter core body, and then drives the filter core body to move to the unlocked position. When the filter core body is in the unlocked position, the locking member is separated from the locking portion, and then the sliding block is separated from the sliding groove. The elastic force of the elastic member is released. Under the action of the elastic force, the one of the sliding block or the sliding groove connected with the filter core body is popped out by the elastic member, and then drives the filter core body to be popped out. The filter core body is separated from the waterway plate, and the disassembly of the filter core body is realized. The user only needs to press the filter core body to realize the installation and disassembly of the filter core body. The user operation is more convenient, the risk of water leakage is reduced, and the structure is not easy to be damaged.

[0010] Preferably, the sliding block is provided with a guide groove on one side in the thickness direction thereof, and the guide groove is communicated with the locking portion.

[0011] One end of the locking member is elastically connected to the sliding groove, and the other end of the locking member is slidable in the guide groove.

[0012] In the present scheme, the sliding block is provided with a guide groove on one side in the thickness direction thereof. When the other end of the locking member slides in the guide groove, the other end of the locking member is more easily guided to the locking portion through the guidance of the guide groove, and then the locking member is connected to the locking portion, so that the sliding block is fixed to the sliding groove, and the installation of the filter core body is more smooth.

[0013] Preferably, the sliding block further comprises a separation portion, the locking portion is communicated with the separation portion, and the locking member can be separated from the sliding block in the separation portion.

[0014] In the present scheme, the sliding block is further provided with a separation portion, and the separation portion is communicated with the locking portion. When the filter core body is unlocked, the other end of the locking member slides out of the locking portion to the separation portion, and then separates from the sliding block, so that the sliding block is separated from the sliding groove, and the filter core body is separated from the waterway plate, and the disassembly of the filter core body is realized.

[0015] Preferably, the locking portion is arranged at the upper end of the guide groove.

[0016] The guide groove comprises a first guide segment, and the first guide segment extends upwardly in the direction from bottom to top.

[0017] In the scheme, in the direction from bottom to top, the extension direction of the first guide section is set to extend obliquely upward, so as to more conveniently guide the other end of the locking member upward to the locking portion, and further connect the other end of the locking member to the locking portion, so as to make the installation of the filter core body more smooth.

[0018] Preferably, the guide groove further comprises a second guide section, the first guide section and the second guide section are sequentially arranged in the direction from bottom to top, and the second guide section communicates with the locking portion.

[0019] In the direction from bottom to top, the second guide section is inclined to the direction close to the locking portion.

[0020] In the scheme, the first guide section and the second guide section are sequentially arranged in the direction from bottom to top, the other end of the locking member slides from the first guide section to the second guide section, and then slides from the second guide section to the locking portion, and in the direction from bottom to top, the second guide section is inclined to the direction close to the locking portion, so as to more conveniently guide the other end of the locking member to the locking portion, and more conveniently connect the locking member to the locking portion, and further improve the smoothness of the installation of the filter core body.

[0021] Preferably, the disengaging portion comprises a disengaging section.

[0022] In the width direction of the guide groove, the disengaging section is arranged opposite to the second guide section.

[0023] In the direction from top to bottom, the disengaging section is inclined to the direction away from the locking portion.

[0024] In the scheme, the disengaging portion comprises a disengaging section, the disengaging section and the second guide section are arranged opposite to each other in the width direction of the guide groove, so as to make the locking member slide from the second guide section to the locking portion in the same direction as that of the locking member sliding from the locking portion to the disengaging section, and the locking member does not need to change direction when locking and unlocking, so as to make the movement of the locking member more smooth. In the direction from top to bottom, the disengaging section is inclined to the direction away from the locking portion, so as to more conveniently move the locking member from the locking portion to the disengaging section, and further disengage the slider, and further improve the smoothness of the installation and unlocking of the filter core body.

[0025] Preferably, the locking portion is further provided with a protrusion, so as to form a first opening between the locking portion and the guide groove, and form a second opening between the locking portion and the disengaging portion.

[0026] The size of the first opening is smaller than the size of the other end of the locking portion, and the size of the second opening is larger than the size of the other end of the locking portion.

[0027] In this design, a protrusion is provided on the locking part, creating a first opening between the locking part and the guide groove, and a second opening between the locking part and the disengagement part. The size of the first opening is smaller than the size of the other end of the locking part, while the size of the second opening is larger than the size of the other end of the locking part. Therefore, when the user presses the filter body, the filter body will not slide back into the guide groove from the first opening, but will slide out through the second opening to the disengagement part, where it will disengage from the slider, thus unlocking the filter body. By providing the protrusion, the locking element does not need to change direction during locking and unlocking, making its movement smoother and further improving the smoothness of filter body installation and unlocking.

[0028] Preferably, the slider is provided with a protrusion at one end near the elastic member, and the elastic member is provided with a notch that matches the shape of the protrusion;

[0029] In the direction of movement of the filter element body, the protrusion is aligned with the recess.

[0030] In this design, by setting a protrusion and a notch that matches the shape of the protrusion, a guiding function is provided. When the filter element assembly is installed, the slider and the elastic element can be better aligned, allowing the spring to be compressed more smoothly and accumulate elastic force.

[0031] Preferably, the slider is disposed on the filter element body, and the groove is disposed on the water channel plate;

[0032] The slide groove also includes a guide groove, and the filter element body is provided with a guide member. The guide groove extends along the movement direction of the filter element body, and the guide member can slide within the guide groove.

[0033] In this design, when the filter element body is installed, it gradually moves from the unlocked position to the locked position. The guide component on the filter element body also moves accordingly, enters the guide groove, and slides within it. This guides the movement direction of the filter element body, allowing the slider to be more easily fixed in the groove. Similarly, when the filter element body is disassembled, the cooperation between the guide component and the guide groove can better guide the movement direction of the filter element body, making disassembly smoother and further improving the fluidity of filter element body installation and disassembly.

[0034] Preferably, the guide groove includes a first guide section and a second guide section, the first guide section is located at the end of the second guide section away from the elastic member in the direction of movement of the filter element body, and the end of the first guide section away from the second guide section passes through the slide groove;

[0035] The width of the first guide segment gradually increases in the direction from the end of the first guide segment near the second guide segment to the end of the first guide segment away from the second guide segment.

[0036] In this solution, during filter element installation, the guide first passes through the first guide section and then enters the second guide section. In the direction from the end of the first guide section near the second guide section to the end of the first guide section away from the second guide section, the width of the first guide section is gradually increased, making it easier for the guide to enter the first guide section. This avoids the problem that the guide is difficult to enter the guide groove due to the width of the first guide section being too small, and further improves the smoothness of filter element installation and disassembly.

[0037] The positive and progressive effects of this utility model are as follows:

[0038] The filter cartridge body is designed to move between a locked position and an unlocked position. When installing the filter cartridge body, the user presses it to move to the locked position. In this position, the locking element engages with the locking part, fixing the slider to the slide groove, thus securing the filter cartridge body to the water channel plate. The elastic element between the slider and the slide groove is compressed. When removing the filter cartridge body, the user presses it to move to the unlocked position. In this position, the locking element disengages from the locking part, disengaging the slider from the slide groove. The elastic element's force is released, causing the slider or slide groove connected to the filter cartridge body to be ejected by the elastic element, thus ejecting the filter cartridge body and detaching it from the water channel plate. This simple pressing action allows for easy installation and removal of the filter cartridge body, reducing the risk of leakage and minimizing structural damage. Attached Figure Description

[0039] Fig. 1 This is a three-dimensional structural diagram of a filter element assembly according to an embodiment of the present invention.

[0040] Fig. 2 This is a three-dimensional structural diagram of the groove and slider in the locked position according to an embodiment of the present invention.

[0041] Fig. 3 This is a three-dimensional structural diagram of the groove and slider in the unlocked position according to an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] Filter body 100

[0044] Waterway board 200

[0045] Slider 300

[0046] Locking unit 310

[0047] 311 protrusions

[0048] First opening 312

[0049] Second opening 313

[0050] Guide groove 320

[0051] First guide section 321

[0052] Second guide section 322

[0053] Separation section 330

[0054] Separation section 331

[0055] 332

[0056] Protrusion 340

[0057] 400 Slide

[0058] Guide slot 410

[0059] First guiding section 411

[0060] Second guiding section 412

[0061] Elastic element 500

[0062] Notch 510

[0063] Locking part 600

[0064] Guide component 700 Detailed Implementation

[0065] The present invention will be further described below by way of embodiments, but the present invention is not limited to the scope of the following embodiments.

[0066] like Figs. 1-3 As shown, this embodiment provides a filter element assembly, which includes a filter element body 100, a water channel plate 200, a slider 300, a sliding groove 400, and an elastic element 500.

[0067] One of the slider 300 and the groove 400 is fixed to the filter element body 100, and the other is fixed to the water channel plate 200. The slider 300 can slide within the groove 400. One end of the elastic member 500 is fixed to the groove 400, and the other end of the elastic member 500 can fit against the slider 300. The elastic force direction of the elastic member 500 is consistent with the movement direction of the filter element body 100. The filter element assembly also includes a locking member 600. The slider 300 is provided with a locking part 310. The locking member 600 is elastically connected to the groove 400, and the locking member 600 can be connected to or disengaged from the locking part 310.

[0068] The filter element body 100 is configured to move between a locked position and an unlocked position. When the user needs to install the filter element body 100, the user presses the filter element body 100 to move it to the locked position. When the filter element body 100 is in the locked position, the locking member 600 is connected to the locking part 310, thereby fixing the slider 300 to the slide groove 400, thus fixing the filter element body 100 to the water channel plate 200, realizing the installation of the filter element. At this time, the elastic member 500 provided between the slider 300 and the slide groove 400 is compressed.

[0069] When the user needs to disassemble the filter element body 100, the user presses the filter element body 100, which moves the filter element body 100 to the unlocked position. When the filter element body 100 is in the unlocked position, the locking member 600 disengages from the locking part 310, thereby causing the slider 300 to disengage from the slide groove 400. The elastic force of the elastic member 500 is released. Under the action of the elastic force, the slider 300 or the one in the slide groove 400 connected to the filter element body 100 is ejected by the elastic member 500, thereby causing the filter element body 100 to be ejected. The filter element body 100 disengages from the water circuit board 200, realizing the disassembly of the filter element body 100. The user only needs to press the filter element body 100 to realize the installation and disassembly of the filter element body 100, which makes the operation more convenient for the user, reduces the risk of water leakage, and is less likely to cause structural damage.

[0070] In this embodiment, the slider 300 is disposed on the filter element body 100, and the groove 400 is disposed on the water channel plate 200. In other embodiments, the groove 400 may be disposed on the filter element body 100, and the slider 300 may be disposed on the water channel plate 200.

[0071] In this embodiment, the chute 400 is directly fixed to the water circuit board 200. In other embodiments, a frame can be set inside the water softener, and both the chute 400 and the water circuit board 200 can be fixed to the frame, so that the chute 400 is fixed relative to the water circuit board 200. Those skilled in the art can choose a suitable fixing structure for the chute 400 and the water circuit board 200.

[0072] The slider 300 has a guide groove 320 on one side of its thickness direction, which connects to the locking part 310. One end of the locking member 600 is elastically connected to the slide groove 400, and the other end of the locking member 600 can slide within the guide groove 320. When the other end of the locking member 600 slides within the guide groove 320, since the guide groove 320 connects to the locking part 310, the other end of the locking member 600 is more easily guided to the locking part 310 through the guidance of the guide groove 320, thereby connecting the locking member 600 to the locking part 310, so that the slider 300 is fixed to the slide groove 400, making the installation of the filter element body 100 smoother.

[0073] The slider 300 also includes a disengagement part 330, and a locking part 310 is connected to the disengagement part 330. The locking member 600 can disengage from the slider 300 at the disengagement part 330. When the filter element body 100 is unlocked, the other end of the locking member 600 slides out from the locking part 310 to the disengagement part 330, and then disengages from the slider 300 at the disengagement part 330, thereby disengaging the slider 300 from the slide groove 400, and disengaging the filter element body 100 from the water channel plate 200, thus realizing the disassembly of the filter element body 100.

[0074] The locking part 310 is located at the upper end of the guide groove 320. The guide groove 320 includes a first guide section 321. The first guide section 321 extends obliquely upward in the direction from bottom to top, which makes it easier to guide the other end of the locking member 600 upward to the locking part 310, thereby connecting the other end of the locking member 600 to the locking part 310, making the installation of the filter element body 100 smoother.

[0075] The guide groove 320 also includes a second guide section 322. In the direction from bottom to top, the first guide section 321 and the second guide section 322 are arranged sequentially. The second guide section 322 is connected to the locking part 310. The other end of the locking member 600 slides from the first guide section 321 to the second guide section 322, and then slides from the second guide section 322 to the locking part 310. In the direction from bottom to top, the second guide section 322 is inclined towards the locking part 310, which makes it easier to guide the other end of the locking member 600 to the locking part 310 and makes it easier to connect the locking member 600 and the locking part 310, further improving the smoothness of the installation of the filter body 100.

[0076] The disengagement portion 330 includes a disengagement section 331. In the width direction of the guide groove 320, the disengagement section 331 is positioned opposite to the second guide section 322, allowing the locking member 600 to slide from the second guide section 322 to the locking portion 310 in the same direction as the locking member 600 sliding from the locking portion 310 to the disengagement section 331. This eliminates the need for the locking member 600 to change direction during locking and unlocking, resulting in smoother movement. In the downward direction, the disengagement section 331 is inclined away from the locking portion 310, further facilitating the movement of the locking member 600 from the locking portion 310 to the disengagement section 331 and subsequently disengaging from the slider 300, further improving the smoothness of the installation and unlocking of the filter element body 100.

[0077] In this embodiment, the disengagement part 330 further includes a disengagement port 332, which is located at the lower end of the disengagement section 331. After the locking member 600 moves to the disengagement section 331, it disengages from the slider 300 at the disengagement port 332. By providing the disengagement port 332, it is easier for the locking member 600 to disengage from the slider 300.

[0078] The locking part 310 is also provided with a protrusion 311, which forms a first opening 312 between the locking part 310 and the guide groove 320, and a second opening 313 between the locking part 310 and the disengagement part 330. The size of the first opening 312 is smaller than the size of the other end of the locking part 310, and the size of the second opening 313 is larger than the size of the other end of the locking part 310. Therefore, when the user presses the filter body 100, the filter body 100 will not slide back from the first opening 312 to the guide groove 320, but can slide out from the second opening 313 to the disengagement part 330, and then disengage from the slider 300 at the disengagement part 330, thereby unlocking the filter body 100. By setting the protrusion 311, the locking member 600 does not need to change direction when locking and unlocking, and the movement of the locking member 600 is smoother, further improving the smoothness of the installation and unlocking of the filter body 100.

[0079] The slider 300 has a protrusion 340 at one end near the elastic member 500, and the elastic member 500 has a recess 510 that matches the shape of the protrusion 340. In the direction of movement of the filter element body 100, the protrusion 340 and the recess 510 are aligned. By providing the protrusion 340 and the recess 510 that matches the shape of the protrusion 340, a guiding function is provided. When the filter element assembly is installed, the slider 300 and the elastic member 500 can be better aligned, allowing the spring to be compressed more smoothly and accumulate elastic force.

[0080] The slide groove 400 also includes a guide groove 410. A guide member 700 is provided on the filter element body 100. The guide groove 410 extends along the movement direction of the filter element body 100, and the guide member 700 can slide within the guide groove 410. When the filter element body 100 is installed, it gradually moves from the unlocked position to the locked position. The guide member 700 on the filter element body 100 also moves accordingly, entering the guide groove 410 and sliding within it. This guides the movement direction of the filter element body 100, allowing the slider 300 to be more easily fixed in the slide groove 400. Similarly, when the filter element body 100 is disassembled, the cooperation between the guide member 700 and the guide groove 410 better guides the movement direction of the filter element body 100, making disassembly smoother and further improving the fluidity of the filter element body 100's installation and disassembly.

[0081] The guide groove 410 includes a first guide section 411 and a second guide section 412. The first guide section 411 is located at the end of the second guide section 412 away from the elastic member 500 in the direction of movement of the filter body 100. The end of the first guide section 411 away from the second guide section 412 passes through the slide groove 400. The width of the first guide section 411 gradually increases in the direction from the end of the first guide section 411 near the second guide section 412 to the end of the first guide section 411 away from the second guide section 412.

[0082] During the installation of the filter element body 100, the guide 700 first passes through the first guide section 411 and then enters the second guide section 412 from the first guide section 411. In the direction from the end of the first guide section 411 near the second guide section 412 to the end of the first guide section 411 away from the second guide section 412, the width of the first guide section 411 is gradually increased, making it easier for the guide 700 to enter the first guide section 411. This avoids the problem that the guide 700 has difficulty entering the guide groove 410 due to the width of the first guide section 411 being too small, and further improves the smoothness of the installation and removal of the filter element body 100.

[0083] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship of the device or component during normal use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation at any time, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model in this respect.

[0084] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A filter cartridge assembly characterized by, The filter core assembly comprises a filter core body, a waterway plate, a sliding block, a sliding groove and an elastic member; One of the sliding block and the sliding groove is fixed on the filter core body, and the other is fixed on the waterway plate; the sliding block can slide in the sliding groove; one end of the elastic member is fixed on the sliding groove, and the other end of the elastic member can be attached to the sliding block; the elastic force direction of the elastic member is consistent with the movement direction of the filter core body; The filter core assembly further comprises a locking member; the sliding block is provided with a locking portion; the locking member is elastically connected to the sliding groove; the locking member can be connected to or separated from the locking portion; The filter core body is arranged to be movable between a locked position and an unlocked position; when the filter core body is in the locked position, the locking member is connected to the locking portion; when the filter core body is in the unlocked position, the locking member is separated from the locking portion.

2. The filter cartridge assembly of claim 1, wherein, The sliding block is provided with a guide groove on one side in the thickness direction of the sliding block; the guide groove is connected to the locking portion; One end of the locking member is elastically connected to the sliding groove; the other end of the locking member can slide in the guide groove.

3. The filter cartridge assembly of claim 2 wherein, The sliding block further comprises a separation portion; the locking portion is connected to the separation portion; the locking member can be separated from the sliding block in the separation portion.

4. The filter cartridge assembly of claim 3 wherein, The locking portion is arranged at the upper end of the guide groove; The guide groove comprises a first guide segment; in the upward direction, the first guide segment extends upwardly and obliquely.

5. The filter cartridge assembly of claim 4 wherein, The guide groove further comprises a second guide segment; in the upward direction, the first guide segment and the second guide segment are arranged in sequence; the second guide segment is connected to the locking portion; In the upward direction, the second guide segment is inclined toward the locking portion.

6. The filter cartridge assembly of claim 5 wherein, The separation portion comprises a separation segment; In the width direction of the guide groove, the separation segment is arranged opposite to the second guide segment; In the downward direction, the separation segment is inclined away from the locking portion.

7. The filter cartridge assembly of claim 3 wherein, The locking portion is further provided with a protrusion; the first opening is formed between the locking portion and the guide groove; the second opening is formed between the locking portion and the separation portion; The size of the first opening is smaller than the size of the other end of the locking portion; the size of the second opening is larger than the size of the other end of the locking portion.

8. The filter cartridge assembly of claim 1 wherein, The sliding block is further provided with a protruding portion at one end close to the elastic member; the elastic member is provided with a notch matching the shape of the protruding portion; In the movement direction of the filter core body, the protruding portion is aligned with the notch.

9. The filter cartridge assembly of any of claims 1-8, wherein, The sliding block is arranged on the filter core body; the sliding groove is arranged on the waterway plate; The sliding groove further comprises a guide groove; the filter core body is provided with a guide member; the guide groove extends in the movement direction of the filter core body; the guide member can slide in the guide groove.

10. The filter cartridge assembly of claim 9 wherein, The guide groove comprises a first guide segment and a second guide segment; the first guide segment is arranged at one end of the second guide segment away from the elastic member in the movement direction of the filter core body; one end of the first guide segment away from the second guide segment penetrates the sliding groove; The width of the first guide section gradually increases in a direction from one end of the first guide section closer to the second guide section to the other end of the first guide section farther from the second guide section.