Filter element structure and water purification equipment

Abstract

The utility model discloses a filter element structure and water purification equipment, and relates to the technical field of water purification, the filter element structure comprises a first filter bottle, a filter assembly and a valve body assembly, the first filter bottle is internally provided with a cavity, and the first filter bottle is provided with a first water inlet hole and a first water outlet hole; the filtering assembly is arranged in the cavity; the valve body assembly comprises a first water stop valve and a second water stop valve, the first water stop valve is arranged in the first water inlet hole, and the periphery of the first water stop valve is in interference fit connection with the inner wall of the first water inlet hole; the second water stop valve is arranged in the first water outlet hole, and the periphery of the second water stop valve is connected with the inner wall of the first water outlet hole in an interference fit mode. According to the technical scheme, the first water stop valve and the second water stop valve are in interference fit connection with the first water inlet hole and the first water outlet hole in the first filter bottle, so that the situation that the first water stop valve and the second water stop valve are installed through an ultrasonic welding pressing plate is avoided, welding defects of the filter element structure are avoided, the production yield is increased, and the production cost is reduced. And the filter element structure can bear higher water pressure.

Description

Technical Field

[0001] This application relates to the field of water purification technology, and in particular to a filter element structure and water purification equipment. Background Technology

[0002] Currently, some filter cartridges are equipped with a stop valve. After the stop valve is installed inside the filter cartridge, an ultrasonic welding plate is needed to seal the cartridge. However, ultrasonic welding of the plate may reduce the pressure-bearing capacity of the filter cartridge and increase the risk of water leakage. Furthermore, in actual production, ultrasonic welding may cause weld damage and burrs on the filter cartridge, thus affecting the production quality. Therefore, the existing filter cartridge structure with a stop valve suffers from low pressure-bearing capacity and low production yield. Utility Model Content

[0003] The main purpose of this application is to propose a filter element structure and water purification equipment, which aims to solve the problems of low pressure bearing capacity and low production yield of filter element structures with water stop valves.

[0004] To achieve the above objectives, the filter element structure proposed in this application includes:

[0005] The first filter bottle has an internal cavity and a first water inlet and a first water outlet.

[0006] A filter assembly, wherein the filter assembly is disposed within the cavity;

[0007] The valve body assembly includes a first stop valve and a second stop valve. The first stop valve is disposed in the first inlet hole, and the outer periphery of the first stop valve is connected to the inner wall of the first inlet hole through interference fit. The second stop valve is disposed in the first outlet hole, and the outer periphery of the second stop valve is connected to the inner wall of the first outlet hole through interference fit.

[0008] In one embodiment, the outer periphery of the first stop valve is interference-fitted with the inner wall of the first inlet hole; the outer periphery of the second stop valve is interference-fitted with the inner wall of the first outlet hole; or,

[0009] The outer periphery of the first stop valve is threadedly connected to the inner wall of the first inlet hole; the outer periphery of the second stop valve is threadedly connected to the inner wall of the first outlet hole.

[0010] In one embodiment, the outer periphery of the first stop valve is provided with a first external thread structure, and the inner wall of the first inlet hole is provided with a first internal thread connection, wherein the first external thread structure and the first internal thread structure are threadedly engaged; and / or,

[0011] The second stop valve has a second external thread structure on its outer periphery, and the inner wall of the first outlet hole has a second internal thread connection. The second external thread structure and the second internal thread structure are threadedly engaged; and / or,

[0012] The outer periphery of the first stop valve is sealed to the inner wall of the first inlet hole; and / or,

[0013] The outer periphery of the second stop valve is sealed to the inner wall of the first outlet hole.

[0014] In one embodiment, the outer surface of the first stop valve is provided with a first mounting groove, and a first sealing ring is provided in the first mounting groove; and / or,

[0015] The outer surface of the second stop valve is provided with a second mounting groove, and a second sealing ring is provided in the second mounting groove.

[0016] In one embodiment, the first stop valve has a first tightening groove at the opening end near the first inlet hole; and / or,

[0017] The second stop valve has a second tightening groove at the opening end near the first outlet hole.

[0018] In one embodiment, the first tightening groove is configured as a cross groove or a slotted groove; and / or,

[0019] The second tightening groove is configured as a cross groove or a slotted groove.

[0020] In one embodiment, the filtration assembly includes a first filter element disposed within a first filter bottle, a first water inlet channel being formed between the outer surface of the first filter element and the inner wall of the first filter bottle, the first water inlet channel communicating with the first water inlet hole; and a first water outlet channel being formed inside the first filter element, the first water outlet channel communicating with the first water outlet hole.

[0021] In one embodiment, the first filter bottle is further provided with a second water inlet and a second water outlet; the valve body assembly further includes a third stop valve and a fourth stop valve, the third stop valve is disposed in the second water inlet, and the outer periphery of the third stop valve is detachably connected to the inner wall of the second water inlet; the fourth stop valve is disposed in the second water outlet, and the outer periphery of the fourth stop valve is detachably connected to the inner wall of the second water outlet.

[0022] In one embodiment, the filtration assembly further includes a second filter bottle, a second filter element, and a central tube disposed within the first filter bottle. The first filter element is sleeved on the outer surface of the second filter bottle, and a first water outlet channel is formed between the inner wall of the first filter element and the outer surface of the second filter bottle. The second filter element is disposed within the second filter bottle, and a first water passage is formed inside the second filter element. One end of the central tube communicates with the first water passage, and the other end of the central tube communicates with the second water outlet. A second water outlet channel is formed inside the central tube, and the second water outlet channel communicates with both the first water passage and the second water outlet. A second water inlet channel is formed between the inner wall of the second filter bottle and the outer surface of the central tube, and a second water passage is formed between the inner wall of the second filter bottle and the outer surface of the second filter element. The second water inlet channel communicates with both the second water passage and the second water inlet.

[0023] This application also proposes a water purification device, including the filter element structure as described above.

[0024] The technical solution of this application utilizes the interference fit between the first stop valve and the first inlet hole on the first filter bottle to create a certain amount of interference between them, thereby achieving the purpose of fastening and fixing the first stop valve and the first filter bottle; and utilizes the interference fit between the second stop valve and the first outlet hole on the first filter bottle to achieve installation limit of the first and second stop valves, thereby creating a certain amount of interference between them, and achieving the purpose of fastening and fixing the second stop valve and the first filter bottle; this filter element structure avoids the use of ultrasonic welding pressure plates to install the first and second stop valves, thus avoiding welding defects in the filter element structure, improving product consistency and reliability, and achieving the purpose of increasing production yield; at the same time, it can enhance the structural strength of the entire filter element structure, enabling it to withstand higher water pressure. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 A schematic diagram of an embodiment of the filter element structure provided in this application;

[0027] Figure 2 An exploded view of an embodiment of the filter element structure provided in this application;

[0028] Figure 3 A schematic diagram of the structure of the first stop valve in an embodiment of the filter element structure provided in this application.

[0029] Explanation of icon numbers:

[0030] 1. First filter bottle; 11. First water inlet; 13. First water outlet; 14. Second water inlet; 15. Second water outlet; 2. Filter assembly; 21. First filter element; 22. Second filter bottle; 23. Second filter element; 24. Central tube; 3. Valve body assembly; 31. First stop valve; 311. First external thread structure; 312. First mounting groove; 313. First sealing ring; 314. First tightening groove; 32. Second stop valve; 33. Third stop valve; 34. Fourth stop valve; 101. First water inlet channel; 102. First water outlet channel; 103. Second water inlet channel; 104. Second water outlet channel; 105. First water passage channel; 106. Second water passage channel.

[0031] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0032] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0033] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0034] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0035] Currently, some filter cartridges are equipped with a stop valve. After the stop valve is installed inside the filter cartridge, an ultrasonic welding plate is needed to seal the cartridge. However, ultrasonic welding of the plate may reduce the pressure-bearing capacity of the filter cartridge and increase the risk of water leakage. Furthermore, in actual production, ultrasonic welding may cause weld damage and burrs on the filter cartridge, thus affecting the production quality. Therefore, the existing filter cartridge structure with a stop valve suffers from low pressure-bearing capacity and low production yield.

[0036] To address the aforementioned issues, this application proposes a filter element structure.

[0037] Please see Figures 1 to 3 In one embodiment of this application, the filter element structure includes a first filter bottle 1, a filter assembly 2, and a valve body assembly 3. The first filter bottle 1 has an internal cavity and a first water inlet 11 and a first water outlet 13. The filter assembly 2 is disposed in the cavity. The valve body assembly 3 includes a first stop valve 31 and a second stop valve 32. The first stop valve 31 is disposed in the first water inlet 11, and the outer periphery of the first stop valve 31 is connected to the inner wall of the first water inlet 11 through interference fit. The second stop valve 32 is disposed in the first water outlet 13, and the outer periphery of the second stop valve 32 is connected to the inner wall of the first water outlet 13 through interference fit.

[0038] In the above structure, by using the interference fit between the first stop valve 31 and the first water inlet 11 on the first filter bottle 1, a certain amount of interference is created between the first stop valve 31 and the first water inlet 11, so as to achieve the purpose of fastening and fixing the first stop valve 31 and the first filter bottle 1; and by using the interference fit between the second stop valve 32 and the first water outlet 13 on the first filter bottle 1, the installation of the first stop valve 31 and the second stop valve 32 is limited, so as to create a certain amount of interference between the second stop valve 32 and the first water outlet 13, so as to achieve the purpose of fastening and fixing the second stop valve 32 and the first filter bottle 1. This filter element structure can avoid the use of ultrasonic welding pressure plates to install the first stop valve 31 and the second stop valve 32, thereby avoiding welding defects in the filter element structure, improving product consistency and reliability, and achieving the purpose of improving production yield; at the same time, it can enhance the structural strength of the entire filter element structure, enabling the filter element structure to withstand higher water pressure.

[0039] In one embodiment, the outer periphery of the first stop valve 31 is interference-fitted with the inner wall of the first inlet hole 11; the outer periphery of the second stop valve 32 is interference-fitted with the inner wall of the first outlet hole 13.

[0040] By using an interference fit between the first stop valve 31 and the first water inlet 11 on the first filter bottle 1, the first stop valve 31 and the first filter bottle 1 are secured and fixed; and by using an interference fit between the second stop valve 32 and the first water outlet 13 on the first filter bottle 1, the second stop valve 32 and the first filter bottle 1 are secured and fixed. The interference fit eliminates the need for additional fasteners, simplifying the structure.

[0041] In another embodiment, the outer periphery of the first stop valve 31 is threadedly connected to the inner wall of the first inlet hole 11; the outer periphery of the second stop valve 32 is threadedly connected to the inner wall of the first outlet hole 13.

[0042] In the above structure, the outer periphery of the first stop valve 31 is connected to the inner wall of the first inlet hole 11 by threads, and the outer periphery of the second stop valve 32 is also connected to the inner wall of the first outlet hole 13 by threads. This facilitates disassembly and reassembly when needed, which is helpful for maintenance and repair. Moreover, the threaded connection has self-locking properties, which can ensure the stability of the connection between the first stop valve 31 and the second stop valve 32 even under water flow impact. By using threaded fit instead of ultrasonic pressure plate welding for fixing, welding defects in the filter element structure can be avoided, and the consistency and reliability of the produced filter element structure can be improved.

[0043] In one embodiment, the outer periphery of the first water stop valve 31 is provided with a first external thread structure 311, and the inner wall of the first water inlet hole 11 is provided with a first internal thread connection, and the first external thread structure 311 and the first internal thread structure are threadedly engaged; the outer periphery of the second water stop valve 32 is provided with a second external thread structure, and the inner wall of the first water outlet hole 13 is provided with a second internal thread connection, and the second external thread structure and the second internal thread structure are threadedly engaged.

[0044] The outer periphery of the first stop valve 31 is provided with a first external thread structure 311, and the inner wall of the first inlet hole 11 is provided with a corresponding first internal thread connection, so that the first stop valve 31 can be screwed into or out of the first inlet hole 11 by rotation, which has the advantages of easy installation and disassembly, good sealing and certain self-locking characteristics; similarly, the outer periphery of the second stop valve 32 is provided with a second external thread structure, and the inner wall of the first outlet hole 13 is provided with a corresponding second internal thread connection, so that the second stop valve 32 can be screwed into or out of the first outlet hole 13 by rotation, which has the advantages of easy installation and disassembly and certain self-locking characteristics.

[0045] In one embodiment, the outer periphery of the first stop valve 31 is sealed to the inner wall of the first inlet hole 11; the outer periphery of the second stop valve 32 is sealed to the inner wall of the first outlet hole 13. The sealing connection can be achieved in various ways, including but not limited to the use of O-rings, Teflon tape, or other sealing materials. A good sealing connection can prevent water leakage, thereby improving the reliability of the entire filter element structure and reducing the need for maintenance and replacement due to leakage.

[0046] In one embodiment, the outer surface of the first water stop valve 31 is provided with a first mounting groove 312, and a first sealing ring 313 is provided in the first mounting groove 312; the outer surface of the second water stop valve 32 is provided with a second mounting groove, and a second sealing ring is provided in the second mounting groove.

[0047] A first mounting groove 312 is provided on the outer surface of the first stop valve 31, which can provide a fixed position for the first sealing ring 313 to ensure that the first sealing ring 313 will not shift during assembly; similarly, a second mounting groove is provided on the outer surface of the second stop valve 32, which can provide a fixed position for the second sealing ring to ensure that the second sealing ring will not shift during assembly.

[0048] In one embodiment, the first water stop valve 31 is provided with a first tightening groove 314 at the opening end near the first water inlet 11, and the second water stop valve 32 is provided with a second tightening groove at the opening end near the first water outlet 13.

[0049] The first stop valve 31 has a first tightening groove 314 at the open end of the first inlet hole 11. The first tightening groove 314 can be used to engage with a tightening tool to provide sufficient friction and gripping points when installing or removing the first stop valve 31, thereby reducing the risk of the first stop valve 31 slipping off during installation or removal and improving operational safety. Similarly, the second stop valve 32 has a second tightening groove at the open end of the first outlet hole 13. The function of the second tightening groove is similar to that of the first tightening groove 314, which is used to facilitate the installation and removal of the second stop valve 32.

[0050] In one embodiment, the first tightening groove 314 is configured as a cross groove or a slotted groove; the second tightening groove is configured as a cross groove or a slotted groove.

[0051] The first tightening groove 314 and the second tightening groove are configured as either Phillips head or slotted head grooves. Both groove types are common fastener groove types, providing convenient tool access points for installing and removing the first stop valve 31 or the second stop valve 32. The Phillips head groove is a groove with vertical intersecting lines. It is typically used with a Phillips head screwdriver, whose head has a cross-shaped tip that inserts into the groove and provides good torque transmission. The Phillips head groove provides torque transmission in multiple directions, which helps apply force at different angles and is less prone to slippage. The slotted head groove is a straight groove, typically used with a flathead screwdriver (also called a flathead screwdriver). The flathead screwdriver's head has a straight section that inserts into the slot. The slotted head groove has low requirements for tightening tools; even without special tools, it can be operated with other straight objects. Both Phillips head and slotted head grooves ensure quick disassembly and replacement of the first stop valve 31 and the second stop valve 32 while maintaining ease of operation and safety. It should be noted that since the first stop valve 31 and the second stop valve 32 are both provided with water flow holes in the middle, the water flow holes pass through the cross groove or the straight groove, making the center of the cross groove and the straight groove a discontinuous structure.

[0052] In one embodiment, the filter assembly 2 includes a first filter element 21 disposed in a first filter bottle 1, a first water inlet channel 101 is formed between the outer surface of the first filter element 21 and the inner wall of the first filter bottle 1, and the first water inlet channel 101 is connected to a first water inlet hole 11; a first water outlet channel 102 is formed inside the first filter element 21, and the first water outlet channel 102 is connected to a first water outlet hole 13.

[0053] The first filter element 21 is disposed inside the first filter bottle 1. The first filter element 21 is used to filter the flowing water or other liquids. A first water inlet channel 101 is formed between the outer surface of the first filter element 21 and the inner wall of the first filter bottle 1, and a first water outlet channel 102 is formed inside the first filter element 21. The fluid to be filtered flows into the first water inlet channel 101 from the first water inlet hole 11, and after being filtered by the first filter element 21, it forms a first filtered fluid. The first filtered fluid flows out from the first water outlet hole 13 through the first water outlet channel 102.

[0054] In one embodiment, the first filter bottle 1 is further provided with a second water inlet 14 and a second water outlet 15; the valve body assembly 3 further includes a third water stop valve 33 and a fourth water stop valve 34, the third water stop valve 33 is disposed in the second water inlet 14, and the outer periphery of the third water stop valve 33 is detachably connected to the inner wall of the second water inlet 14; the fourth water stop valve 34 is disposed in the second water outlet 15, and the outer periphery of the fourth water stop valve 34 is detachably connected to the inner wall of the second water outlet 15.

[0055] By adding a second inlet hole 14 and a second outlet hole 15 to the first filter bottle 1, and by placing a third stop valve 33 inside the second inlet hole 14 and a fourth stop valve 34 inside the second outlet hole 15, the water flow in the second inlet hole 14 and the fourth stop valve 34 respectively allows for unidirectional water flow in the second inlet hole 14 and the second outlet hole 15. The addition of the second inlet hole 14 and the second outlet hole 15 provides additional water flow channels for the filter element structure, which can be used for different filtration needs or as backup channels, thereby improving the overall processing capacity of the filter element structure. It should be noted that the structures of the third stop valve 33 and the fourth stop valve 34 are the same as those of the first stop valve 31 and the second stop valve 32.

[0056] In one embodiment, the filter assembly 2 further includes a second filter bottle 22, a second filter element 23, and a central tube 24 disposed within the first filter bottle 1. The first filter element 21 is sleeved on the outer surface of the second filter bottle 22, and a first water outlet channel 102 is formed between the inner wall of the first filter element 21 and the outer surface of the second filter bottle 22. The second filter element 23 is disposed within the second filter bottle 22, and a first water passage channel 105 is formed inside the second filter element 23. One end of the central tube 24 is connected to the first water passage channel 105, and the other end of the central tube 24 is connected to the first water passage channel 105. One end is connected to the second water outlet 15. A second water outlet channel 104 is formed inside the central tube 24, which is connected to both the first water passage 104 and the second water outlet 15. A second water inlet channel 103 is formed between the inner wall of the second filter bottle 22 and the outer surface of the central tube 24. A second water passage 106 is formed between the inner wall of the second filter bottle 22 and the outer surface of the second filter element 23. The second water inlet channel 103 is connected to both the second water passage 106 and the second water inlet 14. It should be noted that the first filter element 21 is a pre-filter element, and the second filter element 23 is a post-filter element.

[0057] In the above structure, the first filter element 21 and the second filter element can be used to handle different filtration tasks respectively. Since the first water outlet 13 and the second water inlet 14 are connected by a connector, the filter element structure can achieve dual-stage filtration, improve the filtration effect, and ensure the purity of the water. The connector can be a connecting pipe or a connecting joint. For example, the fluid to be filtered enters the first water inlet channel 101 from the first water inlet 11, and after being filtered by the first filter element 21, it forms the first filtered fluid. The first filtered fluid passes through the first water outlet channel 102 and is then output from the first water outlet 13. Since the first water outlet 13 and the second water inlet 14 are connected by a connector, the first filtered fluid is input from the second water inlet 14 into the second water inlet channel 103, passes through the second water passage channel 106, and is then filtered by the second filter element 23 to form the second filtered fluid, which converges in the first water passage channel 105. After being guided by the second water outlet channel 104 of the central pipe 24, the second filtered fluid is finally output from the second water outlet 15.

[0058] It should be noted that the first stop valve 31, the second stop valve 32, the third stop valve 33 and the fourth stop valve 34 are used to enable the fluid to be filtered or the fluid to be filtered to flow in one direction, ensuring that the fluid to be filtered or the fluid to be filtered can only flow in one direction and preventing backflow.

[0059] The technical solution of this application utilizes the interference fit between the first stop valve 31 and the first inlet hole 11 on the first filter bottle 1 to create a certain amount of interference between the first stop valve 31 and the first inlet hole 11, thereby achieving the purpose of fastening and fixing the first stop valve 31 and the first filter bottle 1; and utilizes the interference fit between the second stop valve 32 and the first outlet hole 13 on the first filter bottle 1 to achieve the installation limit of the first stop valve 31 and the second stop valve 32, thereby creating a certain amount of interference between the second stop valve 32 and the first outlet hole 13, thereby achieving the purpose of fastening and fixing the second stop valve 32 and the first filter bottle 1; this filter element structure can avoid the use of ultrasonic welding pressure plates to install the first stop valve 31 and the second stop valve 32, thereby avoiding welding defects in the filter element structure, improving product consistency and reliability, and achieving the purpose of improving production yield; at the same time, it can enhance the structural strength of the entire filter element structure, enabling the filter element structure to withstand higher water pressure.

[0060] This application also proposes a water purification device, which includes a filter element structure. The specific structure of the filter element structure is as described in the above embodiments. Since this water purification device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0061] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A filter element structure, characterized in that, include: The first filter bottle has an internal cavity and a first water inlet and a first water outlet. A filter assembly, wherein the filter assembly is disposed within the cavity; The valve body assembly includes a first stop valve and a second stop valve. The first stop valve is disposed in the first inlet hole, and the outer periphery of the first stop valve is connected to the inner wall of the first inlet hole through interference fit. The second stop valve is disposed in the first outlet hole, and the outer periphery of the second stop valve is connected to the inner wall of the first outlet hole through interference fit.

2. The filter element structure as described in claim 1, characterized in that, The outer periphery of the first stop valve is interference-fitted with the inner wall of the first inlet hole; the outer periphery of the second stop valve is interference-fitted with the inner wall of the first outlet hole; or, The outer periphery of the first stop valve is threadedly connected to the inner wall of the first inlet hole; the outer periphery of the second stop valve is threadedly connected to the inner wall of the first outlet hole.

3. The filter element structure as described in claim 2, characterized in that, The outer periphery of the first stop valve is provided with a first external thread structure, and the inner wall of the first inlet hole is provided with a first internal thread connection. The first external thread structure and the first internal thread structure are threadedly engaged; and / or, The second stop valve has a second external thread structure on its outer periphery, and the inner wall of the first outlet hole has a second internal thread connection. The second external thread structure and the second internal thread structure are threadedly engaged; and / or, The outer periphery of the first stop valve is sealed to the inner wall of the first inlet hole; and / or, The outer periphery of the second stop valve is sealed to the inner wall of the first outlet hole.

4. The filter element structure as described in claim 3, characterized in that, The outer surface of the first stop valve is provided with a first mounting groove, and a first sealing ring is provided in the first mounting groove; and / or, The outer surface of the second stop valve is provided with a second mounting groove, and a second sealing ring is provided in the second mounting groove.

5. The filter element structure as described in claim 1, characterized in that, The first stop valve has a first tightening groove at the opening end near the first inlet hole; and / or, The second stop valve has a second tightening groove at the opening end near the first outlet hole.

6. The filter element structure as described in claim 5, characterized in that, The first tightening groove is configured as a cross groove or a slotted groove; and / or, The second tightening groove is configured as a cross groove or a slotted groove.

7. The filter element structure according to any one of claims 1 to 6, characterized in that, The filtration assembly includes a first filter element disposed inside a first filter bottle, a first water inlet channel being formed between the outer surface of the first filter element and the inner wall of the first filter bottle, the first water inlet channel being connected to the first water inlet hole; and a first water outlet channel being formed inside the first filter element, the first water outlet channel being connected to the first water outlet hole.

8. The filter element structure as described in claim 7, characterized in that, The first filter bottle is also provided with a second water inlet and a second water outlet; the valve body assembly further includes a third stop valve and a fourth stop valve, the third stop valve is disposed in the second water inlet, and the outer periphery of the third stop valve is detachably connected to the inner wall of the second water inlet; the fourth stop valve is disposed in the second water outlet, and the outer periphery of the fourth stop valve is detachably connected to the inner wall of the second water outlet.

9. The filter element structure as described in claim 8, characterized in that, The filtration assembly further includes a second filter bottle, a second filter element, and a central tube disposed inside the first filter bottle. The first filter element is sleeved on the outer surface of the second filter bottle, and the first water outlet channel is formed between the inner wall of the first filter element and the outer surface of the second filter bottle. The second filter element is disposed inside the second filter bottle. A first water passage is formed inside the second filter element. One end of the central tube is connected to the first water passage, and the other end of the central tube is connected to the second water outlet. A second water outlet is formed inside the central tube. The second water outlet is connected to both the first water passage and the second water outlet. A second water inlet is formed between the inner wall of the second filter bottle and the outer surface of the central tube. A second water passage is formed between the inner wall of the second filter bottle and the outer surface of the second filter element. The second water inlet is connected to both the second water passage and the second water inlet.

10. A water purification device, characterized in that, Includes the filter element structure as described in any one of claims 1 to 9.

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