Filter cartridge assembly, joint seat and water purifier

Abstract

The utility model provides a kind of filter element assembly, joint seat and pure drinking machine belong to filter element technical field, a kind of filter element assembly, for filter element, including filter element joint and the shell fixedly connected with filter element joint, shell is enclosed into the cavity of accommodating filter element, filter element is RO membrane filter element and has the central pipeline for gathering purified water, raw water enters by the top of filter element, waste water flows out by the bottom of filter element and enters the waste water passage formed by the gap of filter element and shell, the technical scheme can realize positive washing, without setting valve structure, without frequent operation.

Description

Technical Field

[0001] This utility model relates to the field of filter technology, and more specifically, to filter components, connectors, and water purifiers. Background Technology

[0002] Water purifier filter cartridges are used to filter tap water through ultrafiltration or reverse osmosis to obtain purified water suitable for drinking. Generally, pre-filtration is performed to remove larger impurities before ultrafiltration or reverse osmosis to extend the lifespan of the filter cartridge. Filter cartridges typically include PP cotton, carbon granules, ceramic filter cartridges, carbon rods, carbon fiber filter cartridges, and RO (Reverse Osmosis) membranes.

[0003] These water purifiers partially integrate filtration and raw water supply functions, while others feature forward and / or reverse rinsing to extend the lifespan of the filter cartridges. Most water purifiers achieving these functions use control valves and valve cores, rotating them to control water flow and achieve forward or reverse rinsing. However, the valve-based adjustment system can be difficult for users to operate, and improper operation can easily lead to severe wear of the valve core, failing to achieve the intended filtration purpose.

[0004] Based on the above-mentioned technological status, this application proposes a forward-rinsing filter element and its components, as well as a water purifier having the above-mentioned components. Utility Model Content

[0005] The technical solution disclosed in this application can achieve forward flushing without the need for a valve structure or frequent operation.

[0006] A filter cartridge assembly includes a filter cartridge connector and a housing fixedly connected to the filter cartridge connector. The housing encloses a cavity for accommodating the filter cartridge. The filter cartridge is an RO membrane filter cartridge and has a central conduit for collecting purified water. Raw water enters from the top of the filter cartridge, and wastewater flows out from the bottom of the filter cartridge and enters a wastewater channel formed by the gap between the filter cartridge and the housing.

[0007] The filter element connector has flanges on both sides for locking connection. The circular platform on the inner side of the flange extends upward to form a sealing port I, and the circular platform on the inner side of the flange extends downward to form an annular platform. The outer side of the annular platform is circumferentially spaced with slots.

[0008] The filter element assembly also includes a sealing element I assembled inside the filter element connector. The sealing element I is coaxially constructed into multiple cylindrical structures with different diameters and a conical structure. The lower end of the sealing element I is a first annular surface for including the filter element. A second annular surface is connected above the first annular surface. Guide plates are circumferentially spaced inside the second annular surface. The bottom of the guide plates abuts against the top of the filter element. The central pipe extends into the second space enclosed by the second annular surface. A third annular surface is connected above the second annular surface. An inner annular surface is constructed on the inner side of the third annular surface. A sealing port II is connected to the top of the third annular surface. The top of the third annular surface forms an end face platform that abuts against the bottom of the annular platform.

[0009] The filter element assembly also includes a sealing element II assembled inside the sealing element I. The lower end of the sealing element II is constructed as a sleeve structure. The upper part of the sleeve structure is a sealing section. A groove is constructed on the upper outer side of the sealing section. The outer diameter of the upper part of the sealing section is larger than the outer diameter of the lower part of the sealing section. A through hole is opened laterally below the sealing section. The through hole is separated from the space I enclosed by the sleeve structure. A sealing port III connected to the upper part of the sealing section and communicating with the through hole is connected to the upper part of the sealing section. A guide hole is opened above the sealing section. The guide hole communicates with the space I and is separated from the through hole.

[0010] The sealing section is sealed to the inner annular surface, and the top of the sealing section abuts against the bottom of the sealing port II.

[0011] Preferably, a retaining protrusion is provided on the lower side of the flange.

[0012] Preferably, the filter element connector is heat-fused to the outer shell.

[0013] Preferably, multiple sealing grooves are provided on the outer side of the sealing port I.

[0014] Preferably, multiple sealing grooves are provided on the outer side of the sealing port II.

[0015] Preferably, a plurality of sealing grooves are provided on the upper outer side of the sealing port III.

[0016] Preferably, guide vanes are provided at circumferential intervals on the lower outer side of the sealing port III.

[0017] This application also proposes a connector for the above-mentioned filter element assembly, wherein the connector is assembled with the filter element assembly, and the lower inner side of the connector is provided with a engaging mating part that engages with the flange; the lower inner side of the connector is coaxially constructed with annular surface I, annular surface II and annular surface III in sequence, annular surface I and annular surface II are adjacent to each other and form channel I, annular surface II and annular surface III are adjacent to each other and form channel II, and annular surface III is formed on the inner side of channel III; the upper part of the connector is vertically provided with opening I, opening I extends upward to form pipe I; on one side of opening I, non-connected openings II and III are provided laterally, opening II extends laterally to form pipe II, and opening III extends laterally to form pipe III;

[0018] Channel I is connected to pipe III, channel II is connected to pipe II, and channel III is connected to pipe I.

[0019] Preferably, the annular surface I is sealed and assembled with the sealing port I, the annular surface II is sealed and assembled with the sealing port II, and the annular surface III is sealed and assembled with the sealing port III.

[0020] This application also proposes a water purifier, including the above-mentioned filter assembly and the above-mentioned connector (20).

[0021] The technical solution of this application provides a filter element assembly for use as a filter element, including a filter element connector and a housing fixedly connected to the filter element connector. The housing encloses a cavity for accommodating the filter element. The filter element is an RO membrane filter element and has a central pipe for collecting purified water. Raw water enters from the top of the filter element, and wastewater flows out from the bottom of the filter element and enters the wastewater channel formed by the gap between the filter element and the housing. This technical solution can achieve forward flushing, without the need for a valve structure and without frequent operation. Attached Figure Description

[0022] Referring to the accompanying drawings, the drawings used in the following description of the embodiments or prior art will be briefly introduced. Obviously, the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model.

[0023] Figure 1 This is a three-dimensional structural diagram of the overall structure and installation state of the filter element assembly involved in this application;

[0024] Figure 2 This is a three-dimensional structural diagram of the filter element body and filter element connector involved in this application;

[0025] Figure 3 This is a three-dimensional structural diagram of the connector seat involved in this application;

[0026] Figure 4 This is a three-dimensional structural diagram of the connector seat from another perspective related to this application;

[0027] Figure 5 This is a three-dimensional structural diagram of the connector seat from another perspective related to this application;

[0028] Figure 6 This is a cross-sectional view of the transversely cut joint seat involved in this application;

[0029] Figure 7 This is a cross-sectional view of the filter element assembly involved in this application in its assembled state;

[0030] Figure 8 This is a cross-sectional view of the filter element connector involved in this application;

[0031] Figure 9 This is a cross-sectional view of the seal I involved in this application;

[0032] Figure 10 This is a three-dimensional structural diagram of the seal II involved in this application;

[0033] Figure 11 This is a three-dimensional structural schematic diagram of seal II from another perspective related to this application;

[0034] Figure 12 This is a cross-sectional view of the seal II involved in this application.

[0035] Explanation of icon numbers:

[0036] 100. Filter element assembly;

[0037] 10. Filter element body;

[0038] 11. Filter element connector; 111. Engaging part; 112. Flange; 113. Engaging protrusion; 114. Circular platform; 115. Sealing port I; 1151. Sealing groove; 116. Circular platform; 1161. Groove;

[0039] 12. Outer casing; 1211. Wastewater channel;

[0040] 13. Filter element; 131. Central pipe;

[0041] 14. Seal I; 141. Lower end face; 142. First annular surface; 143. First space; 144. Second annular surface; 145. Second space; 146. Guide plate; 147. Third annular surface; 147a. Inner annular surface; 147b. End face platform; 148. Third space; 149. Sealing port II; 1491. Sealing groove;

[0042] 15. Seal II; 151. Sleeve structure; 151a. Space I; 152. Sealing section; 152a. Sealing groove; 152b. Through hole; 152c. Guide hole; 153. Sealing port III; 153a. Sealing groove; 153b. Guide plate;

[0043] 20. Connector base;

[0044] 21. Lower part of connector seat; 211. Engaging part; 212. Slot;

[0045] 22. Upper part of the connector seat; 221. Opening I; 2211. Pipe I; 222. Opening II; 2221. Pipe II; 223. Opening III; 2231. Pipe III;

[0046] 231. Circular surface I; 2311. Channel I; 232. Circular surface II; 2321. Channel II; 233. Circular surface III; 2331. Channel III;

[0047] 30. Fixture 30.

[0048] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0049] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. Based on the described embodiments of this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0050] It should be noted that if the embodiments of this utility model 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 certain specific posture (as shown in the figure). If the specific posture changes, the directional indicators will also change accordingly.

[0051] See Figure 1 , Figure 1 The overall structure and installation status of the filter element assembly are shown. The filter element assembly 100 includes a filter element body 10, a connector 20 connected to the filter element body 10, and a fixing bracket 30 for fixing the connector 20.

[0052] In some embodiments, the filter element body 10 is engaged with the connector seat 20 to facilitate the installation and replacement of the filter element body 10.

[0053] Specifically, such as Figure 2 As shown, the filter element body 10 has a filter element connector 11, and engaging portions 111 are constructed on both sides of the filter element connector 11. The engaging portions 111 are flanges 112 symmetrically arranged circumferentially along the filter element connector 11, and engaging protrusions 113 are provided on the lower side of the flanges 112; correspondingly, as Figure 3 As shown, the lower part 21 of the connector seat has an inner structure of a locking engagement part 211 that mates with the locking part. The locking engagement part 211 is symmetrically arranged circumferentially along the inner side of the lower part 21 of the connector seat, corresponding to the locking protrusion 113 on the lower side of the flange 112. The upper side of the locking engagement part 211 is provided with a locking groove 212. The locking protrusion 113 mates with the locking groove 212. The filter element body 10 and the connector seat 20 are locked together by screwing. The locking connection is achieved by rotation, and the separation is achieved by reverse rotation, which enables convenient installation, disassembly and replacement.

[0054] See Figure 4 The lower part of the connector 20 is connected to the upper part of the connector 22. The upper part of the connector 22 is vertically provided with an opening I221. The opening I221 extends upward to form a pipe I2211. On one side of the opening I221, there are two non-connecting openings II222 and III223. The openings II222 and III223 extend laterally to both sides to form pipes II2221 and III2231 that can be suspended or locked on the fixing frame 30.

[0055] Pipe I 2211 is connected to the raw water or the outlet of the pre-filter, serving as the inlet water for the filter element body 10; pipe II 2221 serves as the outlet water pipe for purified water, and pipe III 2231 serves as the outlet water pipe for wastewater.

[0056] See Figure 5 , Figure 5 A three-dimensional schematic diagram of the internal structure of the connector seat is shown. The upper part 22 of the connector seat forms a multi-layered annular cylindrical structure on the inner side, which cooperates with the components inside the filter element connector 11 to form a sealed space.

[0057] See also Figure 5 The upper part 22 of the connector seat has annular surfaces of different diameters constructed from the sidewall inwards. Annular surface I 231 is formed on the inner side of the sidewall. Annular surface II 232 is constructed inside and adjacent to annular surface I 231. Annular surface III 233 is constructed inside annular surface II 232. A channel I 2311 is formed between annular surface I 231 and annular surface II 232, and channel I 2311 communicates with pipe III 2231. Figure 6 A channel II2321 is formed between toroidal surface II232 and toroidal surface III233, and channel II2321 is connected to pipe II2221. Figure 6 A channel Ⅲ2331 is formed inside the toroidal surface Ⅲ233, and the channel Ⅲ2331 is connected to the pipe Ⅰ2211. Figure 6 ).

[0058] See Figure 7 , Figure 7 A cross-sectional view of the filter cartridge connector and connector seat in their assembled state is shown. The gray dashed curve in the figure indicates the flow direction of raw water, the green solid curve indicates the flow direction of purified water, and the gray solid curve indicates the flow direction of wastewater.

[0059] The filter element body 10 involved in this application includes a filter element connector 11 and a housing 12 fixedly connected to the filter element connector 11. The housing 12 contains a filter element 13. A sealing element I14 and a sealing element II15 are provided on the top of the filter element 13. The sealing element I14 is sleeved on the outside of the sealing element II15 and fixedly fixed inside the filter element connector 11.

[0060] The outer shell 12 and the filter element 13 form a wastewater channel 1211. The filter element 13 is a traditional RO membrane filter element with a porous central pipe 131. Raw water enters from the top 132 of the filter element 13 (gray dashed curve). Under pressure, the raw water enters the RO membrane filter element from the top 132 of the filter element 13 for filtration. The filtered purified water is collected and discharged through the porous central pipe 131 (green solid curve). The wastewater generated by the RO membrane filter element is discharged from the bottom of the filter element 13 and discharged through the wastewater channel 1211 (gray solid curve).

[0061] For descriptions of traditional RO membrane filter cartridges, please refer to CN119330461A and CN220891193U.

[0062] See Figure 8 , Figure 8 A cross-sectional view of the filter element connector is shown. The filter element connector 11 is fixedly connected to the housing 12, and in some embodiments, the filter element connector 11 and the housing 12 are heat-fused together.

[0063] The circular platform 114 inside the engaging portion 111 of the filter element connector 11 extends upward to form a sealing port I 115 with multiple sealing grooves 1151. The sealing port I 115 is sealed to the annular surface I 231 of the connector seat 20. For example, a sealing ring is provided in the sealing groove 1151, so that the internal space of the sealing port I 115 communicates with the channel I 2331. Figure 7 As shown.

[0064] See also Figure 8 The circular platform 114 on the inner side of the engaging part 111 of the filter element connector 11 extends downward to form an annular platform 116. The annular platform 116 abuts against the sealing element I14 to ensure that the sealing element I14 and the filter element connector 11 are concentrically assembled and to ensure that the sealing element I14 and the filter element 13 are in close contact.

[0065] The outer circumferential structure of the annular platform 116 has multiple slots 1161, and the slot structure 1161 allows the wastewater channel 1211 to be connected to the channel 12311.

[0066] See Figure 9 , Figure 9 A cross-sectional view of seal I is shown. Seal I is assembled inside filter element connector 11. Figure 7 Specifically, the seal I14 is coaxially constructed into multiple cylindrical structures with different diameters, and the overall structure is roughly conical.

[0067] The lower end face 141 of the sealing member I14 surrounds the first annular surface 142 and forms the first space 143 that encloses part of the filter element 13. It can be seen that the first annular surface 142 of the sealing member I14 encloses the filter element 13 to prevent wastewater in the wastewater channel 1211 from entering the first space 143.

[0068] The first annular surface 142 is connected to the second annular surface 144 above it. The second annular surface 144 encloses a second space 145, which is connected to the first space 143. Guide plates 146 are arranged circumferentially on the inner side of the second annular surface 144. The lower end of the guide plate 146 abuts against the top of the filter element 13. The central pipe 131 of the filter element 13 extends into the second space 145.

[0069] The third toroidal surface 147 is connected above the second toroidal surface 144. The third toroidal surface 147 encloses a third space 148, which is connected to the second space 145. An inner toroidal surface 147a is constructed inside the third toroidal surface 147, and the lower end of the inner toroidal surface 147a extends toward the third space 148.

[0070] The top of the third annular surface 147 is connected to a sealing port II 149 having multiple sealing grooves 1491. The sealing port II 149 is sealed to the inner side of the annular surface II 232. For example, a sealing ring is provided in the sealing groove 1491, so that the internal space of the sealing port II 149 communicates with the channel II 2321. Figure 7 As shown.

[0071] The top of the third annular surface 147 forms an end face platform 147b, which mates with the annular platform 116 of the filter element connector 11. Specifically, the end face platform 147b abuts against the bottom of the annular platform 116, and the sealing port II 149 extends into the top of the annular platform 116. With this assembly, the filter element connector 11 uses the annular platform 116 to press the seal I14, and the guide plate 146 of the seal I14 presses the filter element 13, thus achieving coaxial assembly.

[0072] See Figure 10 , Figure 10 A perspective view of seal II is shown. Seal II 15 is assembled inside seal I 14. Figure 7 Specifically, the sealing element II 15 is coaxially constructed into a multi-segment structure. The lower end of the sealing element II 15 is constructed into a sleeve structure 151 that fits tightly with the central pipe 131 of the filter element 13. The sleeve structure 152 encloses a space I 151a that accommodates the central pipe 131. A sealing section 152 is provided above the sleeve structure 151. A sealing groove 152a is opened on the outer side of the upper part of the sealing section 152. The outer diameter of the upper part of the sealing section 152 is larger than the outer diameter of the lower part of the sealing section 152. A through hole 152b is opened laterally below the sealing section 152. The through hole 152b and the space I 151a is separated; sealing section 152 is connected to sealing port Ⅲ153 above, sealing groove 153a is provided above the outer side of sealing port Ⅲ153, and guide plates 153b are provided circumferentially at intervals below the outer side of sealing port Ⅲ153. Sealing port Ⅲ153 is connected to through hole 152b. Guide hole 152c is opened on sealing section 152 of sealing port Ⅲ153. Guide hole 152c is connected to space I 151a and separated from through hole 152b.

[0073] See also Figure 10 , Figure 11 and Figure 12 and combined Figure 7 The sleeve structure 151 of the sealing element II 15 is sleeved on the upper end of the central pipe 131 of the filter element 13. The sealing section 152 of the sealing element II 15 is sealed and connected to the inner annular surface 147a of the sealing element I 14, and the top of the sealing section 152 of the sealing element II 15 abuts against the bottom of the sealing port II 149 of the sealing element I 14. The sealing port III 153 of the sealing element II 15 passes through the sealing port II 149 of the sealing element I 14 and is sealed and connected to the annular surface III 233 of the connector seat 20, so that the channel III 2331 communicates with the sealing port III 153; the sealing section 152 The lower through hole 152b communicates with the third space 148 of the sealing element I14. The third space 148, the second space 145, and the first space 143 of the sealing element I14 are interconnected. Raw water or the outlet water of the pre-filter can enter the channel Ⅲ2331 through the pipe I2211. The channel Ⅲ2331 communicates with the sealing port Ⅲ153. Raw water enters the through hole 152b through the sealing port Ⅲ153, and then sequentially enters the third space 148, the second space 145, and the first space 143 of the sealing element I14, and finally enters the RO membrane filter element 13. Figure 7 (thick dashed curve in the image).

[0074] Purified water flows out from the central pipe 131 of the RO membrane filter element 13 and enters the sealing element II 15. It then enters the gap between the sealing port II 149 of the sealing element I 14 and the sealing port III 153 of the sealing element II 15 through the guide hole 152c connected to the sleeve structure 151. Finally, it flows into the channel II 2321 of the connector seat 20 and exits through the pipe II 2221 connected to the channel II 2321, serving as the purified water outlet. Figure 7(The thick green curve in the image).

[0075] Wastewater filtered by RO membrane filter element 13 enters wastewater channel 1211 through the bottom of filter element 13. Wastewater in wastewater channel 1211 flows into channel I 2311 through the slot 1161 of filter element connector 11, and is discharged through pipe III 2231 connected to channel I 2311. Figure 7 (The gray thick solid curve in the image).

[0076] This application also proposes a water purifier that includes the above-mentioned filter assembly and filter connector.

Claims

1. A filter element assembly for a filter element, comprising a filter element connector (11) and a housing fixedly connected to the filter element connector (11), the housing forming a cavity for accommodating the filter element, the filter element being an RO membrane filter element and having a central conduit (131) for collecting purified water, wherein raw water enters from the top of the filter element, and wastewater flows out from the bottom of the filter element and enters a wastewater channel formed by the gap between the filter element and the housing, characterized in that: The filter element connector (11) has flanges (112) on both sides for locking connection. The circular platform (114) on the inner side of the flange (112) extends upward to form a sealing port I (115), and the circular platform (114) on the inner side of the flange (112) extends downward to form an annular platform (116). The outer side of the annular platform (116) has circumferentially spaced slots (1161). The filter element assembly also includes a sealing element I (14) assembled inside the filter element connector (11). The sealing element I (14) is coaxially constructed into multiple cylindrical structures with different diameters and a conical structure. The lower end of the sealing element I (14) is a first annular surface (142) for including the filter element. A second annular surface (144) is connected above the first annular surface (142). The second annular surface (144) is circumferentially spaced with guide plates (146), and the bottom of the guide plates (146) abuts against... At the top of the filter element, the central pipe (131) extends into the second space (145) enclosed by the second annular surface (144); a third annular surface (147) is connected above the second annular surface (144), and an inner annular surface (147a) is constructed on the inner side of the third annular surface (147); a sealing port II (149) is connected to the top of the third annular surface (147), and an end face platform (147b) is formed at the top of the third annular surface (147) that abuts against the bottom of the annular platform (116). The filter assembly also includes a sealing element II (15) assembled inside the sealing element I (14). The lower end of the sealing element II (15) is constructed as a sleeve structure (151). The upper part of the sleeve structure (151) is a sealing section (152). The upper outer side of the sealing section (152) is constructed with a groove. The outer diameter of the upper part of the sealing section (152) is larger than the outer diameter of the lower part of the sealing section (152). A through hole (152b) is opened laterally below the sealing section (152). The through hole (152b) is separated from the space I (151a) enclosed by the sleeve structure (151). A sealing port III (153) connected to the upper part of the sealing section (152) and communicating with the through hole (152b) is connected to the upper part of the sealing section (152). A guide hole (152c) is opened above the sealing section (152). The guide hole (152c) is connected to the space I (151a) and separated from the through hole (152b). The sealing section (152) is sealed to the inner annular surface (147a), and the top of the sealing section (152) abuts against the bottom of the sealing port II (149).

2. The filter element assembly according to claim 1, characterized in that, A retaining protrusion (113) is provided on the lower side of the flange (112).

3. The filter element assembly according to claim 1, characterized in that, The filter element connector (11) is heat-fused to the outer shell.

4. The filter element assembly according to claim 1, characterized in that, Multiple sealing grooves are provided on the outside of the sealing port I (115).

5. The filter element assembly according to claim 1, characterized in that, Multiple sealing grooves are provided on the outer side of the sealing port II (149).

6. The filter element assembly according to claim 1, characterized in that, Multiple sealing grooves are provided on the upper outer side of the sealing port Ⅲ (153).

7. The filter element assembly according to claim 1, characterized in that, The lower outer side of the sealing port Ⅲ (153) is provided with guide vanes (153b) spaced out in a circumferential manner.

8. A connector (20) for a filter element assembly according to any one of claims 1-7, the connector (20) being assembled with the filter element assembly, characterized in that, The lower inner side of the connector seat (20) is provided with a engaging part (211) that engages with the flange (112); the lower inner side of the connector seat (20) is coaxially constructed with annular surface I (231), annular surface II (232) and annular surface III (233), the annular surface I (231) and the annular surface II (232) are adjacent to each other and form channel I (2311), the annular surface II (232) and the annular surface III (233) are adjacent to each other and form channel II (2321). The inner side of the annular surface Ⅲ (233) forms a channel Ⅲ (2331); the upper part of the connector seat (20) is vertically provided with an opening I (221), which extends upward to form a pipe I (2211); on one side of the opening I (221), there are two non-connected openings Ⅱ (222) and Ⅲ (223), which extend laterally to form a pipe Ⅱ (2221) and a pipe Ⅲ (223) respectively. Channel I (2311) is connected to pipe III (2231), channel II (2321) is connected to pipe II (2221), and channel III (2331) is connected to pipe I (2211).

9. The connector seat (20) according to claim 8, characterized in that, The annular surface I (231) is sealed to the sealing port I (115), the annular surface II (232) is sealed to the sealing port II (149), and the annular surface III (233) is sealed to the sealing port III (153).

10. A water purifier, characterized in that, It includes the filter element assembly described in any one of claims 1-7, and the connector (20) described in any one of claims 8-9.

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