Locking mounting structure of filter element

Abstract

The utility model discloses a filter element locking installation structure which comprises a filter element and a filter seat assembly, the filter element is provided with an installation part, the installation part is provided with a plurality of water guide holes communicated with an inner cavity of the filter element, and a locking structure is arranged between the installation part and the filter seat assembly. The filter element can be rotationally switched between a locking state and an unlocking state relative to the filter seat assembly through the locking structure; when the filter element is installed on the filter seat assembly, one end of the communicating pipe is inserted into the water guide hole of the installation part and communicated with the water guide hole of the installation part, and the filter element can drive the water path connecting disc to rotate relative to the filter seat assembly. When the filter element rotates to a locking state relative to the filter seat assembly, the water passing pipe is communicated with the corresponding water guide hole in the mounting part through the communicating pipe. The filter seat assembly has the advantages that the filter element is convenient to install, and the water leakage prevention performance of the filter seat assembly after the filter element is detached is improved.

Description

Technical Field

[0001] This utility model relates to the field of filter cartridge installation technology for water purifiers, and in particular to a locking installation structure for filter cartridges. Background Technology

[0002] As people's pursuit of quality of life increases, water purifiers are becoming increasingly common in homes. Water purifiers are primarily used for deep filtration and purification of water, removing harmful substances and excess minerals while retaining only beneficial components. However, with prolonged use, the filter cartridges accumulate more and more dirt. When this dirt reaches a certain level, the purifier will fail to filter water properly, resulting in poorer filtration or reduced water flow. At this point, the filter cartridge needs to be replaced to ensure the purifier's continued operation. However, current water purifiers have a closed casing, and the filter cartridge and its holder are typically fixed with bolts. To ensure a watertight seal, a sealing ring is often installed at the connection point to prevent leaks. However, this bolt-locking method can lead to leaks at the connection point when the sealing ring ages or is installed at a slightly cheaper location. Furthermore, bolt-locking is time-consuming and laborious for filter replacement, and assembly is cumbersome, requiring improvement. Utility Model Content

[0003] The purpose of this utility model is to provide a locking installation structure for filter elements, which has the effects of convenient filter element installation and improved water leakage prevention performance of the filter seat assembly after the filter element is removed.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a locking installation structure for a filter element, comprising a filter element and a filter base assembly, wherein the filter element is provided with an installation part, the installation part is provided with a plurality of water guide holes communicating with the inner cavity of the filter element, and a locking structure is provided between the installation part and the filter base assembly, wherein the filter element can rotate and switch between a locked state and an unlocked state relative to the filter base assembly through the locking structure;

[0005] The filter base assembly is rotatably provided with a water passage connection plate, and the filter base assembly is provided with a water passage pipe corresponding to the water guide hole. The water passage connection plate is provided with a connecting pipe. When the filter element is installed on the filter base assembly, one end of the connecting pipe is inserted into the water guide hole of the mounting part and communicates with it. The filter element can drive the water passage connection plate to rotate relative to the filter base assembly. When the filter element rotates relative to the filter base assembly to the locked state, the water passage pipe communicates with the corresponding water guide hole on the mounting part through the connecting pipe.

[0006] By adopting the above technical solution, during assembly, the water circuit connection plate is first installed on the filter base assembly. Then, the installation part of the filter element is aligned with the water circuit connection plate and connected to the pre-installation position of the filter base assembly, so that the connecting pipe on the water circuit connection plate is inserted into the water guide hole of the filter element. Then, the filter element is rotated relative to the filter base assembly in the locking direction. When the filter element rotates, it will drive the water circuit connection plate to rotate synchronously. The locking structure locks and fixes the filter element on the filter base assembly. When the filter element is rotated to the locked state, the water pipe, the connecting pipe and the water guide hole are connected in sequence. When the filter element needs to be removed for cleaning or replacement after long-term use, the filter element can be rotated relative to the filter base assembly in the unlocking direction. The filter element drives the water circuit connection plate to rotate, so that the connecting pipe and the water pipe on the filter base assembly are misaligned. Then, the filter element is removed. The water pipe of the filter base assembly is blocked by the water circuit connection plate, which can achieve the purpose of keeping the water pipe self-sealed after the filter element is removed. It has the effects of convenient filter element installation and improved water leakage prevention performance of the filter base assembly after the filter element is removed.

[0007] A further feature of this invention is that the filter seat assembly has an installation groove corresponding to the mounting part, the side wall of the water circuit connection plate has an annular groove, a first sealing ring is provided in the annular groove, and the side wall of the water circuit connection plate is sealed to the inner wall of the installation groove through the first sealing ring.

[0008] By adopting the above technical solution, the ring can improve the installation firmness of the first sealing ring on the side wall of the water connection plate, and the first sealing ring can improve the water leakage prevention performance between the water connection plate and the inner wall of the installation groove.

[0009] A further feature of this invention is that a valve structure is provided inside the water guide hole. When the filter element is installed on the filter base assembly, the connecting pipe activates the valve structure to the open state. When the filter element is separated from the filter base assembly, the water guide hole remains sealed through the valve structure.

[0010] By adopting the above technical solution, when the filter element is separated from the filter base assembly, the filter element can achieve self-sealing through the valve structure, preventing water leakage after the filter element is removed.

[0011] A further feature of this invention is that the valve structure includes an elastic element and a sealing element disposed in the corresponding water guide hole. The elastic element has a tendency to push the sealing element to block the opening end of the water guide hole. A water guide notch is provided on the side wall of the end of the connecting pipe. When the filter element is installed on the filter seat assembly, the connecting pipe pushes the sealing element away from the opening end of the corresponding water guide hole, so that the connecting pipe communicates with the inner cavity of the filter element through the water guide notch.

[0012] By adopting the above technical solution, after the filter element is installed on the filter base assembly, the connecting pipe of the water circuit connection plate is inserted into the water guide hole of the filter element. The connecting pipe pushes the sealing element to move away from the opening end of the water guide hole, so that the connecting pipe can communicate with the inner cavity of the filter element through the water guide notch.

[0013] A further feature of this invention is that a second sealing ring is provided inside the water guide hole. When the connecting pipe is inserted into the corresponding water guide hole, the outer side of the connecting pipe is sealed to the inner wall of the water guide hole through the second sealing ring.

[0014] By adopting the above technical solution, the second sealing ring can seal and wrap the outer wall of the connecting pipe inserted into the water guide hole, thereby improving the water-proof performance between the outer wall of the connecting pipe and the inner wall of the water guide hole.

[0015] A further feature of this invention is that the filter seat assembly includes a seat body and a mounting sleeve, the mounting groove is formed on the seat body, the mounting sleeve is fixedly connected to the mounting groove, so that the water circuit connecting plate and the mounting sleeve are anti-detached, the water pipe is disposed through the seat body, and the locking structure is disposed between the mounting part and the mounting sleeve.

[0016] By adopting the above technical solution, during assembly, the water circuit connection plate is first rotated and placed in the installation groove, and then the installation sleeve is fixedly installed in the installation groove, so that the lower end of the installation sleeve is stopped and prevented from detaching from the upper end of the water circuit connection plate.

[0017] A further feature of this invention is that the base has a groove at the outlet end of the water pipe, and a third sealing ring is installed in the groove. When the filter element is in an unlocked state relative to the filter base assembly, the water circuit connecting plate and the base are sealed together by the third sealing ring.

[0018] By adopting the above technical solution, when the filter element drives the water circuit connection plate to be in the unlocked state relative to the filter seat assembly, the connecting pipe of the water circuit connection plate and the water pipe of the filter seat assembly are misaligned. The third sealing ring can be used to achieve water sealing between the water outlet end of the water pipe and the water circuit connection plate.

[0019] A further feature of this invention is that the side wall of the mounting sleeve extends with a snap-fit ​​portion, and the base body has a snap-fit ​​groove corresponding to the snap-fit ​​portion that communicates with the mounting groove. The snap-fit ​​portion engages with the snap-fit ​​groove, thereby preventing the mounting sleeve from rotating and positioning it within the mounting groove. The snap-fit ​​portion is then locked and fixed to the base body by bolts.

[0020] By adopting the above technical solution, the mounting sleeve can be positioned on the base by the snap-fit ​​of the snap-fit ​​part and the snap-fit ​​groove, and then the mounting sleeve can be firmly locked on the base by bolts to complete the assembly of the mounting sleeve.

[0021] A further feature of this invention is that the locking structure includes a plurality of locking blocks and locking grooves. The locking blocks are arranged in a ring along the horizontal direction on the side wall of the mounting part. The locking grooves are correspondingly opened on the inner wall of the mounting sleeve. Each locking groove includes a connected insertion section and a locking section. The locking blocks are inserted into the locking groove through the insertion section and rotated to lock in the corresponding locking section.

[0022] By adopting the above technical solution and utilizing the locking cooperation of the locking block and locking groove, the installation part of the filter element can be installed and removed from the mounting sleeve, improving the ease of installation and removal between the filter element and the filter base assembly.

[0023] A further feature of this invention is that the bottom of the water channel connecting plate is provided with a protrusion, and the seat body is provided with an arc groove corresponding to the protrusion. When the water channel connecting plate rotates relative to the seat body, the protrusion is constrained within the arc groove and guided by it.

[0024] By adopting the above technical solution, the protrusion and the arc groove guide and limit each other, which can limit the rotation angle of the water circuit connection plate on the base. At the same time, since the filter element and the water circuit connection plate are relatively anti-rotating, the limited rotation of the filter element on the base is achieved.

[0025] In summary, this utility model has the following beneficial effects:

[0026] The water circuit connection plate is rotatably installed within the mounting groove of the base, while a mounting sleeve is fixedly installed on the base to stop the water circuit connection plate from detaching. A locking structure is also provided between the mounting sleeve and the filter element mounting part. The base has a water pipe, and a connecting pipe runs through the water circuit connection plate. The mounting part has a water guide hole. During assembly, the water circuit connection plate is first installed on the filter base assembly. Then, the mounting part of the filter element is aligned with the water circuit connection plate and connected to the pre-installation position of the filter base assembly, so that the connecting pipe on the water circuit connection plate is inserted into the water guide hole of the filter element. Finally, the filter element is rotated relative to the filter base assembly in the locking direction. The rotation of the filter element drives the water circuit... The connecting plate rotates synchronously, using a locking structure to lock and fix the filter element to the filter base assembly. When the filter element rotates to the locked state, the water pipe, connecting pipe, and water guide hole are connected in sequence. When the filter element needs to be removed for cleaning or replacement after long-term use, the filter element can be rotated relative to the filter base assembly in the unlocking direction. The filter element drives the water connecting plate to rotate, causing the connecting pipe and the water pipe on the filter base assembly to be misaligned. Then the filter element is removed. At this time, the water pipe of the filter base assembly is blocked by the water connecting plate, which can achieve the purpose of keeping the water pipe self-sealing after the filter element is removed. It has the effects of convenient filter element installation and improved water leakage prevention performance of the filter base assembly after the filter element is removed. Attached Figure Description

[0027] Figure 1 This is a structural diagram of the present invention.

[0028] Figure 2 This is a longitudinal sectional view of the present invention.

[0029] Figure 3 This is a utility model Figure 2 A magnified view of a portion of region A in the middle.

[0030] Figure 4 This is an exploded view of this utility model.

[0031] Figure 5 This is an exploded view of the present invention from another perspective.

[0032] In the diagram: 1. Filter element; 11. Mounting part; 111. Water guide hole; 1111. Second sealing ring; 112. Elastic element; 113. Sealing element; 114. Locking block; 1141. Guide part; 2. Filter seat assembly; 21. Seat body; 211. Water pipe; 212. Mounting groove; 213. Embedded groove; 2131. Third sealing ring; 214. Snap-fit ​​groove; 215. Arc groove; 22. Mounting sleeve; 221. Snap-fit ​​part; 222. Locking groove; 2221. Insertion section; 22211. Arc-shaped guide surface; 2222. Locking section; 3. Water connection plate; 31. Connecting pipe; 311. Water guide notch; 32. Annular groove; 321. First sealing ring; 33. Protrusion. Detailed Implementation

[0033] The present invention will be further described below with reference to the accompanying drawings.

[0034] A locking installation structure for a filter element, such as Figure 1-5As shown, the system includes a filter element 1 and a filter base assembly 2. The filter element 1 has a mounting part 11 with several water guide holes 111 communicating with the inner cavity of the filter element 1. A locking structure is provided between the mounting part 11 and the filter base assembly 2, allowing the filter element 1 to rotate between locked and unlocked states relative to the filter base assembly 2. A water channel connecting plate 3 is rotatably mounted on the filter base assembly 2. A water pipe 211 is provided on the filter base assembly 2 corresponding to the water guide holes 111. A connecting pipe 31 is provided on the water channel connecting plate 3. When the filter element 1 is mounted on the filter base assembly 2, one end of the connecting pipe 31 is inserted into and communicates with the water guide hole 111 of the mounting part 11. The filter element 1 can drive the water channel connecting plate 3 to rotate. When the filter element 1 rotates relative to the filter base assembly 2 to the locked state, the water pipe 211 is connected to the corresponding water guide hole 111 on the mounting part 11 through the connecting pipe 31. The filter base assembly 2 is provided with a mounting groove 212 corresponding to the mounting part 11, and the side wall of the water circuit connection plate 3 is provided with an annular groove 32. A first sealing ring 321 is provided in the annular groove 32. The side wall of the water circuit connection plate 3 is sealed with the inner wall of the mounting groove 212 through the first sealing ring 321. The annular shape can improve the installation firmness of the first sealing ring 321 on the side wall of the water circuit connection plate 3, and the first sealing ring 321 can improve the water leakage prevention performance between the water circuit connection plate 3 and the inner wall of the mounting groove 212.

[0035] like Figure 2-3 As shown, a valve structure is provided inside the water guide hole 111. When the filter element 1 is installed on the filter base assembly 2, the connecting pipe 31 activates the valve structure to the open state. When the filter element 1 is separated from the filter base assembly 2, the water guide hole 111 remains sealed through the valve structure. When the filter element 1 is separated from the filter base assembly 2, the filter element 1 can achieve self-sealing using the valve structure to prevent water leakage after the filter element 1 is removed. The valve structure includes an elastic element 112 and a sealing element 113 disposed in the corresponding water guide hole 111. The elastic element 112 has the ability to push the sealing element 113 to seal the opening end of the water guide hole 111. The connecting pipe 31 has a water guide notch 311 on its side wall. When the filter element 1 is installed on the filter base assembly 2, the connecting pipe 31 pushes the sealing member 113 away from the opening end of the corresponding water guide hole 111, so that the connecting pipe 31 communicates with the inner cavity of the filter element 1 through the water guide notch 311. After the filter element 1 is installed on the filter base assembly 2, the connecting pipe 31 of the water circuit connecting plate 3 is inserted into the water guide hole 111 of the filter element 1. The connecting pipe 31 pushes the sealing member 113 to move away from the opening end of the water guide hole 111, so that the connecting pipe 31 can communicate with the inner cavity of the filter element 1 through the water guide notch 311.

[0036] like Figure 3-5As shown, a second sealing ring 1111 is provided inside the water guide hole 111. When the connecting pipe 31 is inserted into the corresponding water guide hole 111, the outer side of the connecting pipe 31 is sealed to the inner wall of the water guide hole 111 through the second sealing ring 1111. The second sealing ring 1111 can seal and wrap the outer wall of the connecting pipe 31 inserted into the water guide hole 111, improving the water leakage prevention performance between the outer wall of the connecting pipe 31 and the inner wall of the water guide hole 111. The filter seat assembly 2 includes a seat body 21 and a mounting sleeve 22. The mounting groove 212 is opened on the seat body 21. The mounting sleeve 22 is fixedly connected to the mounting groove 212, so that the water connection plate 3 and the mounting sleeve 22 are anti-detached. The water pipe 211 is installed through the base 21. The locking structure is located between the mounting part 11 and the mounting sleeve 22. During assembly, the water connection plate 3 is first rotated and placed in the mounting groove 212, and then the mounting sleeve 22 is fixedly installed in the mounting groove 212, so that the lower end of the mounting sleeve 22 stops and prevents detachment from the upper end of the water connection plate 3. The base 21 has a groove 213 at the outlet end of the water pipe 211. A third sealing ring 2131 is installed inside the filter element 1. When the filter element 1 is in the unlocked state relative to the filter seat assembly 2, the water connection plate 3 and the seat 21 are sealed together by the third sealing ring 2131. When the filter element 1 drives the water connection plate 3 to be in the unlocked state relative to the filter seat assembly 2, the connecting pipe 31 of the water connection plate 3 and the water pipe 211 of the filter seat assembly 2 are misaligned. The third sealing ring 2131 can be used to seal the water between the outlet end of the water pipe 211 and the water connection plate 3. The side wall of the mounting sleeve 22 has a snap-fit ​​part. 221, the base body 21 has a snap-fit ​​groove 214 that connects to the mounting groove 212. The snap-fit ​​part 221 and the snap-fit ​​groove 214 engage and cooperate, so that the mounting sleeve 22 is positioned in the mounting groove 212 to prevent rotation. The snap-fit ​​part 221 is locked and fixed to the base body 21 by bolts. By using the snap-fit ​​positioning of the snap-fit ​​part 221 and the snap-fit ​​groove 214, the mounting sleeve 22 can be positioned in the base body 21 to prevent rotation. Then, the mounting sleeve 22 can be firmly locked to the base body 21 by bolts to complete the assembly of the mounting sleeve 22.The locking structure includes several locking blocks 114 and locking grooves 222. The locking blocks 114 are arranged in a ring along the horizontal direction on the side wall of the mounting part 11. The locking grooves 222 are correspondingly opened on the inner wall of the mounting sleeve 22. The locking grooves 222 include a connected insertion section 2221 and a locking section 2222. The locking blocks 114 are inserted into the locking grooves 222 through the insertion section 2221 and rotated to lock into the corresponding locking section 2222. By utilizing the locking cooperation of the locking blocks 114 and the locking grooves 222, the mounting part 11 of the filter element 1 can be disassembled and assembled on the mounting sleeve 22, improving the ease of disassembly and assembly between the filter element 1 and the filter base assembly 2. The contact surface between the insertion section 2221 and the locking block 114 in the insertion direction is set as an arc-shaped guide surface 22211. When the locking block 114 is inserted into the insertion section 2221, the locking block 114 is guided into the corresponding locking section 2222 by the arc-shaped guide surface 22211. In addition, in this embodiment, The locking block 114 has a guide portion 1141 extending obliquely at its tail. During the process of the filter element 1 rotating relative to the filter seat assembly 2 from the locked state to the unlocked state, the guide portion 1141, in conjunction with the arc-shaped guide surface 22211, allows the locking block 114 to slide more smoothly from the locking section 2222 of the locking groove 222 to the insertion section 2221, facilitating the separation of the filter element 1 from the filter seat assembly 2. The bottom of the water channel connecting plate 3 has a protrusion 33, and the seat body 21 has an arc-shaped groove 215 corresponding to the protrusion 33. When the water channel connecting plate 3 rotates relative to the seat body 21, the protrusion 33 is constrained within the arc-shaped groove 215 and guided by it. The protrusion 33 and the arc-shaped groove 215 mutually guide and limit each other, thus restricting the rotation angle of the water channel connecting plate 3 on the seat body 21. Simultaneously, since the filter element 1 and the water channel connecting plate 3 are relatively anti-rotating, the limited rotation of the filter element 1 on the seat body 21 is achieved.

[0037] The basic working principle of this utility model is as follows: A water connection plate 3 is rotatably installed in the mounting groove 212 of the base 21, and a mounting sleeve 22 is fixedly installed on the base 21. The mounting sleeve 22 is used to stop and prevent the water connection plate 3 from falling off. In addition, a locking structure is set between the mounting sleeve 22 and the mounting part 11 of the filter element 1. The base 21 is provided with a water pipe 211, and a connecting pipe 31 is provided through the water connection plate 3. The mounting part 11 is provided with a water guide hole 111. During assembly, the water connection plate 3 is first installed on the filter base assembly 2, and then the mounting part 11 of the filter element 1 is aligned with the water connection plate 3 and connected to the pre-installation position of the filter base assembly 2, so that the connecting pipe 31 on the water connection plate 3 is inserted into the water guide hole 111 of the filter element 1. Then, the filter element 1 is rotated relative to the filter base assembly 2 in the locking direction. When the filter element 1 rotates, it will drive the water connection plate 3 to rotate synchronously. The locking structure locks and fixes the filter element 1 to the filter base assembly 2. When the filter element 1 rotates to the locked state, the water pipe 211, the connecting pipe 31 and the water guide hole 111 are connected in sequence. When the filter element 1 needs to be removed for cleaning or replacement after long-term use, the filter element 1 can be rotated relative to the filter base assembly 2 in the unlocking direction. The filter element 1 drives the water connection plate 3 to rotate, so that the connecting pipe 31 and the water pipe 211 on the filter base assembly 2 are misaligned. Then the filter element 1 is removed. At this time, the water pipe 211 of the filter base assembly 2 is blocked by the water connection plate 3, which can achieve the purpose of keeping the water pipe 211 self-sealed after the filter element 1 is removed. It has the effects of convenient filter element installation and improved water leakage prevention performance of the filter base assembly after the filter element is removed.

[0038] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. A lock-in installation structure of a filter cartridge, characterized by: The utility model provides a filter element (1) and filter seat assembly (2) including, the filter element (1) is equipped with mounting portion (11), the mounting portion (11) is opened with a plurality of water guide hole (111) of the communication filter element (1) inner chamber, the mounting portion (11) with filter seat assembly (2) between is equipped with locking structure, the filter element (1) passes through locking structure can rotate switching between locking state and unlocking state with filter seat assembly (2) relatively, The filter seat assembly (2) is rotatably provided with a waterway connecting disc (3), the filter seat assembly (2) is provided with a water pipe (211) corresponding to the water guide hole (111), and the waterway connecting disc (3) is provided with a communication pipe (31). When the filter element (1) is installed on the filter seat assembly (2), one end of the communication pipe (31) is inserted into the water guide hole (111) of the mounting portion (11) and communicates with it. The filter element (1) can drive the waterway connecting disc (3) to rotate relative to the filter seat assembly (2). When the filter element (1) rotates relative to the filter seat assembly (2) to the locking state, the water pipe (211) communicates with the corresponding water guide hole (111) on the mounting portion (11) through the communication pipe (31).

2. The lock-in installation structure of a filter cartridge according to claim 1, characterized in that: The filter seat assembly (2) is provided with a mounting groove (212) corresponding to the mounting portion (11), and the sidewall of the waterway connecting disc (3) is provided with an annular groove (32). The first sealing ring (321) is arranged in the annular groove (32). The sidewall of the waterway connecting disc (3) is sealingly matched with the inner wall of the mounting groove (212) through the first sealing ring (321).

3. The lock-in installation structure of a filter cartridge according to claim 1, wherein: The water guide hole (111) is provided with a valve structure. When the filter element (1) is installed on the filter seat assembly (2), the communication pipe (31) drives the valve structure to the open state. When the filter element (1) is separated from the filter seat assembly (2), the water guide hole (111) is sealed by the valve structure.

4. The lock-in installation structure of a filter cartridge according to claim 3, characterized in that: The valve structure includes an elastic member (112) and a sealing member (113) arranged in the water guide hole (111). The elastic member (112) has a movement tendency to push the sealing member (113) to block the opening end of the water guide hole (111). The sidewall of the end portion of the communication pipe (31) is provided with a water guide notch (311). When the filter element (1) is installed on the filter seat assembly (2), the communication pipe (31) pushes the sealing member (113) away from the opening end corresponding to the water guide hole (111), so that the communication pipe (31) communicates with the inner chamber of the filter element (1) through the water guide notch (311).

5. The lock-in installation structure of a filter cartridge according to claim 1, characterized by: The water guide hole (111) is provided with a second sealing ring (1111). When the communication pipe (31) is inserted into the water guide hole (111), the outer side of the communication pipe (31) is sealingly matched with the inner wall of the water guide hole (111) through the second sealing ring (1111).

6. The lock-in installation structure of a filter cartridge according to claim 2, wherein: The filter seat assembly (2) comprises a seat body (21) and a mounting sleeve (22), the mounting groove (212) is arranged on the seat body (21), the mounting sleeve (22) is fixedly connected in the mounting groove (212), the waterway connecting disc (3) is prevented from being disengaged from the mounting sleeve (22), the water pipe (211) is arranged through the seat body (21), and the locking structure is arranged between the mounting portion (11) and the mounting sleeve (22).

7. A lock-in installation structure of a filter cartridge according to claim 6, characterized in that: The seat body (21) is provided with an embedding groove (213) at the water outlet end of the water pipe (211), the third sealing ring (2131) is arranged in the embedding groove (213), and when the filter core (1) is in the unlocked state relative to the filter seat assembly (2), the waterway connecting disc (3) and the seat body (21) are sealingly connected through the third sealing ring (2131).

8. The lock-in installation structure of a filter cartridge according to claim 6, characterized by: The mounting sleeve (22) is provided with a clamping portion (221) on the side wall, the seat body (21) is provided with a clamping groove (214) corresponding to the clamping portion (221) and communicating with the mounting groove (212), the clamping portion (221) is clamped and matched with the clamping groove (214), so that the mounting sleeve (22) is rotationally positioned in the mounting groove (212), and the clamping portion (221) is fixed on the seat body (21) by means of a bolt.

9. The lock-in installation structure of a filter cartridge according to claim 6, characterized by: The locking structure comprises a plurality of locking blocks (114) and locking grooves (222), the locking blocks (114) are annularly distributed on the side wall of the mounting portion (11) in the horizontal direction, the locking grooves (222) are correspondingly arranged on the inner wall of the mounting sleeve (22), the locking groove (222) comprises an insertion section (2221) and a locking section (2222) connected with each other, the locking block (114) is inserted into the locking groove (222) through the insertion section (2221) and is locked in the corresponding locking section (2222) by rotating.

10. The lock-in installation structure of a filter cartridge according to claim 9, characterized in that: The waterway connecting disc (3) is provided with a protrusion (33) at the bottom, the seat body (21) is provided with an arc groove (215) corresponding to the protrusion (33), when the waterway connecting disc (3) rotates relative to the seat body (21), the protrusion (33) is constrained in the arc groove (215) and guided matched with the arc groove (215).

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