Filter element assembly and water purifying device

Abstract

The utility model discloses a filter element assembly and a water purification device, and relates to the technical field of water purification, the filter element assembly comprises a filter bottle, an end cover and a sealing ring assembly; the filter bottle is provided with a filter material inlet, and the filter material inlet is communicated with an inner cavity of the filter bottle; an accommodating concave cavity is formed in the end cover and is opposite to the filter material loading opening; the end cover detachably covers the filter material inlet so as to seal the inner cavity of the filter bottle; the end part of one side of the sealing ring assembly is detachably mounted in the filter material loading opening, and the end part of one side of the sealing ring assembly is in sealing fit with the inner wall of the filter material loading opening; the end portion of the other side of the sealing ring assembly is detachably installed in the containing concave cavity, and the end portion of the other side of the sealing ring assembly is matched with the cavity wall of the containing concave cavity in a sealing mode. According to the technical scheme, the problems that an existing filter element is complex in production process and high in element replacement cost can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to a filter element component and a water purification device. Background Art

[0002] The core component of a water purifier is the filter element. This element filters raw water through the corresponding membrane elements, removing impurities and contaminants such as bacteria, calcium and magnesium ions, and heavy metals to ensure water quality. The filter element has a limited lifespan and needs to be replaced after a certain period of use to maintain the purifier's normal filtration function and guarantee the water flow rate and quality.

[0003] The filter bottle and end cap of the existing filter element are fixedly connected by a spin-melting method. Once spin-melted, they cannot be opened or disassembled. Therefore, the filter element needs to be replaced as a whole after the use cycle. This method has the following disadvantages: first, since the outer shell (filter bottle, end cap) needs to be replaced together with the inner core (filter material), the cost of replacing the core is relatively high; on the other hand, since the production process of the spin-melting method is relatively complicated, the manufacturing precision of the filter bottle and the end cap is required to be high, so it takes more manpower, material resources and time costs during manufacturing. Utility Model Content

[0004] The main purpose of the utility model is to provide a filter element assembly, aiming to solve the problems of complex production process and high cost of filter element replacement in the existing filter element.

[0005] To achieve the above-mentioned purpose, the filter element assembly proposed by the present invention includes:

[0006] The filter bottle is provided with a filter material loading port, the filter material loading port being in communication with the inner cavity of the filter bottle;

[0007] The end cap is provided with a receiving cavity, the receiving cavity being opposite to the filter material loading port; the end cap is detachably attached to the filter material loading port to form a sealing effect on the inner cavity of the filter bottle;

[0008] A sealing ring assembly, one side end of the sealing ring assembly is detachably mounted in the filter material loading port, and one side end of the sealing ring assembly is sealed with the inner wall of the filter material loading port; the other side end of the sealing ring assembly is detachably mounted in the accommodating cavity, and the other side end of the sealing ring assembly is sealed with the cavity wall of the accommodating cavity.

[0009] In one embodiment, the sealing ring assembly includes an annular structure, one end of which is detachably mounted in the filter material loading port, and the other end of which is detachably mounted in the accommodating cavity.

[0010] A first sealing groove is formed at one end of the annular structure. The sealing ring assembly further comprises a first sealing ring installed in the first sealing groove. The first sealing ring is sealed against the inner wall of the filter material loading port.

[0011] In one embodiment, a second sealing groove is formed at the other end of the annular structure, and the sealing ring assembly further includes a second sealing ring installed in the second sealing groove, and the second sealing ring is sealed against the cavity wall of the accommodating cavity.

[0012] In one embodiment, the filter bottle includes a first bottle segment and a second bottle segment connected in sequence, the diameter of the first bottle segment is larger than the diameter of the second bottle segment, and the filter material loading port is opened on the end surface of the first bottle segment facing away from the second bottle segment.

[0013] In one embodiment, the end cover includes a first cover segment and a second cover segment connected in sequence, the diameter of the first cover segment is larger than the diameter of the second cover segment, and the accommodating cavity is opened on the end surface of the first cover segment facing away from the second cover segment.

[0014] In one embodiment, a first limiting rib is protruded from the inner wall of the filter material loading port, and the first limiting rib abuts against one end surface of the sealing ring assembly.

[0015] In one embodiment, a second limiting rib is protruding from the cavity wall of the accommodating cavity, and the second limiting rib abuts against the other end surface of the sealing ring assembly.

[0016] In one embodiment, the filter bottle is provided with a first stopper structure, which is arranged around the filter material loading port; the end cap is provided with a second stopper structure, which is arranged around the accommodating cavity; the first stopper structure and the second stopper structure are engaged with each other;

[0017] One of the first stop structure and the second stop structure is a limiting protrusion, and the other one of the first stop structure and the second stop structure is a limiting groove.

[0018] In one embodiment, the end cap is locked to the filter bottle by a threaded fastener.

[0019] In one embodiment, the end cap is locked to the filter bottle by a threaded fastener, and a reserved gap exists between the first stop structure and the second stop structure in the locking direction of the threaded fastener.

[0020] In one embodiment, an art line structure is provided at the joint between the filter bottle and the end cap.

[0021] The utility model also provides a water purification device, comprising the filter element assembly as described above.

[0022] In the technical solution of the present invention, the end cap is detachably mounted on the filter bottle, and the sealing between the filter bottle and the end cap is ensured by the sealing cooperation between the sealing ring assembly, the filter bottle and the end cap. The assembly process is simpler than the existing spin-melt fixing method, does not require complicated process steps, and has low manufacturing precision requirements for the filter bottle and the end cap, thereby reducing the manpower, material resources and time costs consumed in the filter element production process; in addition, since the filter bottle and the end cap are detachable, the end cap can be opened after the use cycle and the filter material inside the filter bottle can be replaced separately without replacing the filter element assembly as a whole. The filter bottle and the end cap can still be retained for use, thereby reducing the cost of replacing the element. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the overall exploded structure of an embodiment of a filter element assembly provided by the present utility model;

[0025] Figure 2 This is a schematic diagram of the overall cross-sectional structure of an embodiment of a filter element assembly provided by the present utility model;

[0026] Figure 3 This is a partial cross-sectional structural diagram of an embodiment of a filter element assembly provided by the present utility model;

[0027] Figure 4 for Figure 3 A magnified schematic diagram of point A in the middle;

[0028] Figure 5 This is a schematic structural diagram of a filter bottle in an embodiment of a filter element assembly provided by the present invention;

[0029] Figure 6 This is a structural diagram of the end cover in one embodiment of the filter element assembly provided by the present invention;

[0030] Figure 7 This is a structural schematic diagram of the sealing ring assembly in one embodiment of the filter element assembly provided by the present invention.

[0031] Description of Figure Numbers:

[0032] 1. Filter bottle; 11. Filter material loading port; 12. First bottle section; 13. Second bottle section; 14. First stop structure; 111. First limiting rib;

[0033] 2. End cover; 21. Accommodating cavity; 22. First cover section; 23. Second cover section; 24. Second stopper structure; 211. Second limiting rib;

[0034] 3. Sealing ring assembly; 31. Ring-shaped structural member; 32. First sealing ring; 33. Second sealing ring; 311. First sealing groove; 312. Second sealing groove;

[0035] 4. Filter material;

[0036] 5. Threaded fasteners.

[0037] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] The core component of a water purifier is the filter element. This element filters raw water through the corresponding membrane elements, removing impurities and contaminants such as bacteria, calcium and magnesium ions, and heavy metals to ensure water quality. The filter element has a limited lifespan and needs to be replaced after a certain period of use to maintain the purifier's normal filtration function and guarantee the water flow rate and quality.

[0042] The filter bottle and end cap of the existing filter element are fixedly connected by a spin-melting method. Once spin-melted, they cannot be opened or disassembled. Therefore, the filter element needs to be replaced as a whole after the use cycle. This method has the following disadvantages: first, since the outer shell (filter bottle, end cap) needs to be replaced together with the inner core (filter material), the cost of replacing the core is relatively high; on the other hand, since the production process of the spin-melting method is relatively complicated, the manufacturing precision of the filter bottle and the end cap is required to be high, so it takes more manpower, material resources and time costs during manufacturing.

[0043] Researchers of this application have discovered that the reason existing filter cartridges use a spin-melt method to securely connect the filter bottle and end cap is primarily because this method ensures a tight seal between the filter bottle and the end cap, preventing external impurities from entering the filter bottle and contaminating the inner core (filter material). In other words, as long as the seal between the filter bottle and the end cap is guaranteed, the filter bottle and end cap are not limited to a fixed connection using a spin-melt method; other detachable connection methods are also possible.

[0044] Based on the above findings, the present invention provides a filter element assembly, which aims to achieve a detachable connection between the filter bottle and the end cover while ensuring the sealing between the filter bottle and the end cover.

[0045] See also Figures 1 to 6 The filter element assembly provided by the embodiment of the present invention includes:

[0046] The filter bottle 1 is provided with a filter material loading port 11, and the filter material loading port 11 is connected to the inner cavity of the filter bottle 1;

[0047] The end cap 2 is provided with a receiving cavity 21, which is opposite to the filter material loading port 11; the end cap 2 is detachably covered on the filter material loading port 11 to form a capping effect on the inner cavity of the filter bottle 1;

[0048] The sealing ring assembly 3, one side end of the sealing ring assembly 3 is detachably installed in the filter material loading port 11, and one side end of the sealing ring assembly 3 is sealed with the inner wall of the filter material loading port 11; the other side end of the sealing ring assembly 3 is detachably installed in the accommodating cavity 21, and the other side end of the sealing ring assembly 3 is sealed with the cavity wall of the accommodating cavity 21.

[0049] In this embodiment, filter material 4 can be loaded into the inner cavity of filter bottle 1 through filter material loading port 11. The filter material 4 may include a reverse osmosis membrane filter layer, a chemical fiber filter layer, an activated carbon filter layer, a carbon fiber filter layer, a polypropylene filter layer, and other functional structural layers for filtering, separating, and purifying the raw water supplied to filter bottle 1. As the filtration and purification process continues, the performance of the filter material 4 gradually degrades; when the performance of the filter material 4 degrades to a critical point, the filter element assembly's life cycle ends.

[0050] The end cap 2 can be detachably sealed on the filter material loading port 11 by means of locking, snap connection, etc.; the accommodating cavity 21 of the end cap 2 and the inner cavity of the filter bottle 1 form a closed cavity, and the filter material 4 is accommodated in the closed cavity; the end cap 2 and the filter bottle 1 together form the outer shell of the filter element assembly to protect the internal filter material 4.

[0051] The two side ends of the sealing ring assembly 3 can be provided with additional sealing devices, or an integrally formed sealing structure can be provided on the two side ends of the sealing ring assembly 3 to achieve a sealed fit between the two side ends of the sealing ring assembly 3 and the filter material loading port 11 and the accommodating cavity 21. The outer diameter of the sealing ring assembly 3 should be compatible with the diameter of the filter material loading port 11 and the diameter of the accommodating cavity 21 to ensure that the sealing ring assembly 3 can be smoothly loaded. At the same time, the inner wall of the filter material loading port 11 and the cavity wall of the accommodating cavity 21 can be used to provide a certain radial limit to the sealing ring assembly 3. The inner diameter of the sealing ring assembly 3 should be larger than the diameter of the filter material 4 to avoid interference with the filter material 4. Preferably, the sealing ring assembly 3 is arranged around the filter material 4.

[0052] by Figure 2Taking the orientation shown as an example, in the actual assembly process, the filter material 4 can be first loaded into the inner cavity of the filter bottle 1 through the filter material loading port 11, and then the sealing ring assembly 3 can be loaded into the filter material loading port 11, so that the lower side end of the sealing ring assembly 3 is sealed with the inner wall of the filter material loading port 11; or the sealing ring assembly 3 can be first loaded into the filter material loading port 11, so that the lower side end of the sealing ring assembly 3 is sealed with the inner wall of the filter material loading port 11, and the filter material 4 can be loaded into the inner cavity of the filter bottle 1 through the filter material loading port 11; after the filter material 4 and the sealing ring assembly 3 are installed, the upper side end of the sealing ring assembly 3 protrudes above the filter material loading port 11, and finally the end cap is installed. 2 is covered on the filter material loading port 11, and the end cap 2 is fixed to the filter bottle 1 by locking, snap connection, etc., so that the upper end of the sealing ring assembly 3 is sealed with the cavity wall of the accommodating cavity 21; in this way, the assembly of the filter element assembly is completed in a convenient and efficient manner. Compared with the existing spin-melt fixing method, this method is simpler to operate, does not require complicated process steps, and has lower manufacturing precision requirements for the filter bottle 1 and the end cap 2, thereby reducing the manpower, material resources and time costs consumed in the filter element production process.

[0053] When the service life of the filter element assembly ends, since the filter bottle 1 and the end cap 2 are detachable, the end cap 2 can be opened, the filter material 4 whose performance has dropped to the critical point can be taken out from the filter bottle 1 and replaced with a new filter material 4, and then the end cap 2 can be closed without replacing the entire filter element assembly. The filter bottle 1 and the end cap 2 can still be retained for use, thereby reducing the cost of replacing the element.

[0054] It can be seen that the filter element assembly provided in this embodiment, the end cap 2 is detachably mounted on the filter bottle 1, and the sealing between the filter bottle 1 and the end cap 2 is ensured by the sealing cooperation between the sealing ring assembly 3 and the filter bottle 1 and the end cap 2. The assembly process is simpler than the existing spin-melt fixing method, does not require complicated process steps, and has low manufacturing precision requirements for the filter bottle 1 and the end cap 2, thereby reducing the manpower, material and time costs consumed in the filter element production process; in addition, since the filter bottle 1 and the end cap 2 are detachable, the end cap 2 can be opened after the use cycle and the filter material 4 inside the filter bottle 1 can be replaced separately without replacing the filter element assembly as a whole. The filter bottle 1 and the end cap 2 can still be retained for use, thereby reducing the cost of replacing the element.

[0055] Optionally, refer to Figures 1 to 7 The sealing ring assembly 3 includes an annular structure 31, one end of the annular structure 31 is detachably mounted in the filter material loading port 11, and the other end of the annular structure 31 is detachably mounted in the accommodating cavity 21;

[0056] A first sealing groove 311 is formed at one end of the annular structure 31 . The sealing ring assembly 3 further includes a first sealing ring 32 installed in the first sealing groove 311 and sealingly fitted to the inner wall of the filter material loading port 11 .

[0057] The first sealing groove 311 is circumferentially opened on the outer cylindrical surface of the annular structure 31, and the inner side of the first sealing ring 32 fits in the first sealing groove 311; when the lower end of the annular structure 31 is installed into the filter material loading port 11, the inner wall of the filter material loading port 11 will squeeze the outer side of the first sealing ring 32, causing the first sealing ring 32 to deform, thereby achieving a sealed fit between the inner wall of the filter material loading port 11 and the outer ring portion of the annular structure 31.

[0058] Preferably, two first sealing grooves 311 are provided on the annular structure 31, and the two first sealing grooves 311 are arranged at intervals along the axial direction of the annular structure 31, and a first sealing ring 32 is installed in each first sealing groove 311. In this way, the sealing effect can be improved by the sealing cooperation between the two first sealing rings 32 and the inner wall of the filter material loading port 11.

[0059] Optionally, refer to Figures 1 to 7 A second sealing groove 312 is formed at the other end of the annular structure 31 . The sealing ring assembly 3 also includes a second sealing ring 33 . The second sealing ring 33 is installed in the second sealing groove 312 . The second sealing ring 33 is sealed and fits with the cavity wall of the accommodating cavity 21 .

[0060] The second sealing groove 312 is circumferentially opened on the outer cylindrical surface of the annular structure 31, and the inner side of the second sealing ring 33 fits in the second sealing groove 312; when the end cover 2 is closed on the filter material loading port 11, the upper end of the annular structure 31 is located in the accommodating cavity 21, and the cavity wall of the accommodating cavity 21 will squeeze the outer side of the second sealing ring 33, causing the second sealing ring 33 to deform, thereby achieving a sealed fit between the cavity wall of the accommodating cavity 21 and the outer ring portion of the annular structure 31.

[0061] Preferably, two second sealing grooves 312 are provided on the annular structure 31, and the two second sealing grooves 312 are arranged at intervals along the axial direction of the annular structure 31, and a second sealing ring 33 is installed in each second sealing groove 312. In this way, the sealing effect can be improved by the sealing cooperation between the two second sealing rings 33 and the cavity wall of the accommodating cavity 21.

[0062] Optionally, refer to Figures 1 to 3 The filter bottle 1 includes a first bottle segment 12 and a second bottle segment 13 connected in sequence. The diameter of the first bottle segment 12 is larger than the diameter of the second bottle segment 13. The filter material loading port 11 is opened on the end surface of the first bottle segment 12 facing away from the second bottle segment 13.

[0063] As shown schematically, the first and second bottle segments 12, 13 are actually formed by dividing the filter bottle 1 into two upper and lower parts through a horizontal cross-section. By setting the diameter of the first bottle segment 12 larger than the diameter of the second bottle segment 13, a radially outward expansion structure is formed on the filter bottle 1 at the position for docking with the end cap 2. Based on the extended space provided by this radially outward expansion structure, the diameter of the filter material loading port 11 can be set larger than the diameter of the inner cavity portion below during design. Since the diameter of the sealing ring assembly 3 is compatible with the diameter of the filter material loading port 11, and the diameter of the filter material 4 is not larger than the diameter of the inner cavity portion below the filter material loading port 11, the sealing ring assembly 3 can be prevented from radially encroaching on the space for accommodating the filter material 4 after being installed in the filter material loading port 11.

[0064] In addition, by setting the diameter of the filter material loading port 11 to be larger than the diameter of the inner cavity portion below, a first stepped cavity structure can be formed inside the filter bottle 1. Therefore, when the sealing ring assembly 3 is loaded into the filter material loading port 11, the turning portion of the first stepped cavity structure can be utilized to form an axial limiting effect on the lower end portion of the sealing ring assembly 3 to control the loading depth of the sealing ring assembly 3.

[0065] Optionally, refer to Figures 1 to 3 The end cover 2 includes a first cover section 22 and a second cover section 23 connected in sequence. The diameter of the first cover section 22 is larger than the diameter of the second cover section 23. The accommodating cavity 21 is opened on the end surface of the first cover section 22 away from the second cover section 23.

[0066] As shown schematically, the first and second cover segments 22, 23 are actually formed by dividing the end cap 2 into two parts, one above the other, through a horizontal cross-section. By setting the diameter of the first cover segment 22 larger than that of the second cover segment 23, a radially outward-expanding structure is formed on the end cap 2 at the location for docking with the filter bottle 1. Based on the extended space provided by this radially outward-expanding structure, the accommodating cavity 21 can be designed as a second stepped cavity structure, with the lower half of the second stepped cavity structure having a larger diameter than the upper half. This ensures that the lower half of the second stepped cavity structure matches the diameter of the sealing ring assembly 3. Furthermore, the transition portion of the second stepped cavity can also be used to axially limit the upper end of the sealing ring assembly 3.

[0067] Optionally, refer to Figures 1 to 5 A first limiting rib 111 is protruded from the inner wall of the filter material loading port 11 , and the first limiting rib 111 abuts against one end surface of the sealing ring assembly 3 .

[0068] Illustratively, by providing the first limiting rib 111, when the sealing ring assembly 3 is installed into the filter material installation port 11, the lower end portion of the sealing ring assembly 3 can be placed on the first limiting rib 111 to form an axial limiting effect on the sealing ring assembly 3, thereby realizing control over the installation depth of the sealing ring assembly 3; in addition, the first limiting rib 111 can also serve as a reinforcing rib structure to enhance the overall structural strength of the filter bottle 1.

[0069] Preferably, a plurality of first limiting ribs 111 are provided and are evenly arranged along the circumference of the filter bottle 1 .

[0070] Optionally, refer to Figures 1 to 6 A second limiting rib 211 is convexly provided on the cavity wall of the accommodating cavity 21 , and the second limiting rib 211 abuts against the other end surface of the sealing ring assembly 3 .

[0071] Illustratively, by providing a second limiting rib 211, when the end cover 2 is closed on the filter material loading port 11, the second limiting rib 211 can also form an axial limiting effect on the sealing ring assembly 3 below; in addition, the second limiting rib 211 can also serve as a reinforcing rib structure to enhance the overall structural strength of the end cover 2.

[0072] Preferably, a plurality of second limiting ribs 211 are provided and are evenly arranged along the circumference of the end cover 2 .

[0073] Furthermore, when the first limiting rib 111 and the second limiting rib 211 are provided at the same time, the sealing ring assembly 3 can be clamped in the axial direction by the abutment between the first limiting rib 111 and the lower end of the sealing ring assembly 3 and the abutment between the second limiting rib 211 and the upper end of the sealing ring assembly 3, thereby ensuring the positional stability of the sealing ring assembly 3.

[0074] Optionally, refer to Figures 1 to 6 The filter bottle 1 is provided with a first stopper structure 14, which is arranged around the filter material loading port 11; the end cap 2 is provided with a second stopper structure 24, which is arranged around the accommodating cavity 21; the first stopper structure 14 and the second stopper structure 24 are engaged with each other;

[0075] One of the first stop structure 14 and the second stop structure 24 is a limiting protrusion, and the other one of the first stop structure 14 and the second stop structure 24 is a limiting groove.

[0076] By means of the snap fit between the first stop structure 14 and the second stop structure 24 , the filter bottle 1 and the end cap 2 can be quickly aligned during the assembly process, thereby reducing the difficulty of assembly.

[0077] Optionally, refer to Figures 1 to 4 The end cap 2 is locked to the filter bottle 1 through a threaded fastener 5.

[0078] The locking installation method using the threaded fastener 5 can achieve a stable connection between the end cap 2 and the filter bottle 1, while also facilitating disassembly. The threaded fastener 5 may include bolts, screws, studs, etc., which are not limited here.

[0079] Optionally, refer to Figures 1 to 4 The end cap 2 is locked to the filter bottle 1 through a threaded fastener 5 , and a reserved gap a exists between the first stop structure 14 and the second stop structure 24 in the locking direction of the threaded fastener 5 .

[0080] by Figure 4 As shown in the example, the threaded fastener 5 vertically locks the end cap 2 to the filter bottle 1. Accordingly, a reserved gap a is provided vertically between the first stop structure 14 and the second stop structure 24. When the threaded fastener 5 secures the end cap 2 to the filter bottle 1, compression occurs between the two. However, by providing the reserved gap a, the direct contact area between the end cap 2 and the filter bottle 1 is reduced, thereby reducing the degree of compression between the end cap 2 and the filter bottle 1. This arrangement not only facilitates assembly of the end cap 2 and the filter bottle 1, but also prevents excessive rebound force between the end cap 2 and the filter bottle 1 due to excessive compression, thereby preventing the problem of excessive rebound force affecting the proper locking of the threaded fastener 5.

[0081] Preferably, the spacing of the reserved gap a is set to 0.1-0.2 mm, which can not only prevent excessive rebound force from being generated between the end cap 2 and the filter bottle 1, but also avoid other adverse effects caused by excessive gap.

[0082] Optionally, refer to Figures 1 to 7 The joint between the filter bottle 1 and the end cover 2 is provided with an art line structure (not shown in the figure).

[0083] In actual manufacturing, the actual dimensions of the filter bottle 1 and end cap 2 often deviate from the designed dimensions. This deviation is often visually manifested as uneven edge contours and insufficient flatness, leading to an uneven appearance gap at the joint between the filter bottle 1 and the end cap 2. To address this issue, this embodiment provides an art line structure at the joint between the filter bottle 1 and the end cap 2. Specifically, this art line structure can be provided at the location on the end cap 2 that interfaces with the filter bottle 1. This art line structure can visually reduce this unevenness and enhance the appearance of the filter element assembly.

[0084] Art line structures are commonly used on plastic housing parts. They typically extend a portion of the lower housing into the upper housing, creating a seamless visual fit between the upper and lower housings and addressing issues with insufficient straightness at the housing edges. For details, please refer to the prior art and will not be elaborated on here.

[0085] See also Figures 1 to 7 , an embodiment of the present invention also provides a water purification device, which includes the filter element assembly in any of the above embodiments.

[0086] In this embodiment, the specific structure of the filter element assembly can be referred to the above embodiment. Since the water purification device in this embodiment adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described in detail here.

[0087] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A filter element assembly, characterized in that: include: The filter bottle is provided with a filter material loading port, the filter material loading port being in communication with the inner cavity of the filter bottle; The end cap is provided with a receiving cavity, the receiving cavity being opposite to the filter material loading port; the end cap is detachably attached to the filter material loading port to form a sealing effect on the inner cavity of the filter bottle; A sealing ring assembly, one side end of the sealing ring assembly is detachably mounted in the filter material loading port, and one side end of the sealing ring assembly is sealed with the inner wall of the filter material loading port; the other side end of the sealing ring assembly is detachably mounted in the accommodating cavity, and the other side end of the sealing ring assembly is sealed with the cavity wall of the accommodating cavity.

2. The filter element assembly according to claim 1, wherein: The sealing ring assembly includes an annular structure, one end of which is detachably mounted in the filter material loading port, and the other end of which is detachably mounted in the accommodating cavity; A first sealing groove is formed at one end of the annular structure, and the sealing ring assembly further comprises a first sealing ring installed in the first sealing groove, and the first sealing ring is in sealing contact with the inner wall of the filter material loading port; And / or, a second sealing groove is formed at the other end of the annular structure, and the sealing ring assembly further includes a second sealing ring, which is installed in the second sealing groove and is sealed to the cavity wall of the accommodating cavity.

3. The filter element assembly according to claim 1, wherein: The filter bottle includes a first bottle segment and a second bottle segment connected in sequence, the diameter of the first bottle segment is larger than the diameter of the second bottle segment, and the filter material loading port is opened on the end surface of the first bottle segment on a side away from the second bottle segment; And / or, the end cover includes a first cover segment and a second cover segment connected in sequence, the diameter of the first cover segment is larger than the diameter of the second cover segment, and the accommodating cavity is opened on the end surface of the first cover segment facing away from the second cover segment.

4. The filter element assembly according to claim 1, wherein: A first limiting rib is protruded from the inner wall of the filter material loading port, and the first limiting rib abuts against one end surface of the sealing ring assembly.

5. The filter element assembly according to claim 1, wherein: A second limiting rib is protruding from the cavity wall of the accommodating cavity, and the second limiting rib abuts against the other end surface of the sealing ring assembly.

6. The filter element assembly according to claim 1, wherein: The filter bottle is provided with a first stopper structure, which is arranged around the filter material loading port; the end cap is provided with a second stopper structure, which is arranged around the accommodating cavity; the first stopper structure and the second stopper structure are engaged with each other; One of the first stop structure and the second stop structure is a limiting protrusion, and the other one of the first stop structure and the second stop structure is a limiting groove.

7. The filter element assembly according to claim 6, characterized in that The end cap is locked to the filter bottle via a threaded fastener.

8. The filter element assembly according to claim 6, wherein: The end cap is locked to the filter bottle via a threaded fastener, and a reserved gap exists between the first stop structure and the second stop structure in the locking direction of the threaded fastener.

9. The filter element assembly according to any one of claims 1 to 8, wherein: An art line structure is provided at the joint position between the filter bottle and the end cover.

10. A water purification device, characterized in that: Comprising the filter element assembly according to any one of claims 1 to 9.

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