Filter element device and water purification equipment
By designing a detachable housing and end cap connection structure in the filter element device, the disassembly and replacement process of the composite filter element is simplified, solving the problem of complex operation in the prior art and achieving convenient replacement and sealing.
Patent Information
- Application Number
- CN202423104735.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-16
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-16
AI Technical Summary
The disassembly of composite filter elements in existing filter devices is complicated, especially since it requires separating different filters multiple times, which makes it inconvenient for users to replace them.
A filter cartridge device is designed, including a housing, a composite filter cartridge assembly, and a first end cap assembly. By providing a first opening at the bottom of the housing and detachably connecting the composite filter cartridge assembly to the first end cap assembly, the entire composite filter cartridge assembly can be detached from the cavity simply by removing the end cap, simplifying the replacement process.
It enables convenient replacement of composite filter elements, reduces operational complexity, and ensures the sealing of the housing and end caps to prevent water leakage.
Smart Images
Figure CN223615552U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water purification technology, and in particular to a filter cartridge device and a water purification equipment. Background Technology
[0002] Water purification equipment typically includes a filter cartridge unit. The filter cartridge's main function is to filter tap water and other water sources to improve the quality of the filtered water. As a crucial component of water purification equipment, the filter cartridge is usually not exposed but is typically housed inside the filter cartridge unit. After a period of use, a large amount of dirt and impurities will accumulate on the filter cartridge, requiring disassembly for cleaning or replacement.
[0003] However, the current filter cartridge devices are relatively complicated to disassemble, especially when composite filter cartridges are used. It may be necessary to separate the different filters in the composite filter cartridge from the filter cartridge device in multiple steps, which is quite complicated and causes inconvenience for users to disassemble and replace the filter cartridges.
[0004] Therefore, there is an urgent need for a new type of filter element device to solve the problem of the relatively complex disassembly operation required to remove the composite filter element from the filter element device. Utility Model Content
[0005] The main purpose of this utility model is to propose a filter cartridge device and a water purification equipment, which aims to solve the problem that the disassembly operation required to remove the composite filter cartridge from the filter cartridge device is relatively complicated.
[0006] To achieve the above objectives, the filter element device proposed in this utility model includes a housing, a composite filter element assembly, and a first end cap assembly. The housing has an internal cavity and a first opening at its bottom, and the housing has an inlet / outlet structure. The composite filter element assembly is disposed within the cavity. The composite filter element assembly includes at least a pre-filter and a post-filter, which are detachably connected. The top of the first end cap assembly is connected to the bottom of the composite filter element assembly, and the first end cap assembly is detachably connected to the first opening to form a sealing fit.
[0007] In one embodiment, the composite filter assembly further includes a front and rear partition structure and an inner partition structure; the front and rear partition structure has an annular outer wall and a bottom wall, and the bottom wall has a second opening; the inner partition structure is tubular, and the bottom end of the inner partition structure is connected to the opening of the second opening; the annular outer wall, the bottom wall, and the outer tube wall of the inner partition structure form a first container; the pre-filter is tubular, the pre-filter is disposed in the first container, and there is a first gap arranged radially between the outer wall of the pre-filter and the annular outer wall, and there is a second gap arranged radially between the inner wall of the pre-filter and the outer tube wall of the inner partition structure.
[0008] In one embodiment, the post-filter is tubular, with the bottom wall away from the inner partition structure being detachably connected to the top of the post-filter. The inner wall of the post-filter, the second opening, and the inner tube wall of the inner partition structure form a post-filter water passage. The bottom end of the post-filter is detachably connected to the top of the first end cap assembly.
[0009] In one embodiment, the filter element device further includes a reverse osmosis membrane element, which is tubular. The reverse osmosis membrane element is disposed in the cavity and sleeved on the outer periphery of the composite filter element assembly. The bottom of the reverse osmosis membrane element abuts against the bottom of the housing. The bottom of the inner sidewall of the reverse osmosis membrane element is used to engage with the first end cap assembly. The outer wall of the reverse osmosis membrane element is used to allow liquid located outside the outer wall of the reverse osmosis membrane element to flow between the outer wall and the inner wall of the reverse osmosis membrane element. The inner wall of the reverse osmosis membrane element is used to filter the liquid located between the outer wall and the inner wall of the reverse osmosis membrane element, so that the filtered reverse osmosis pure water flows through the inner wall of the reverse osmosis membrane element to the post-filter, and the remaining wastewater moves axially between the outer wall and the inner wall of the reverse osmosis membrane element.
[0010] In one embodiment, a second end cap assembly is provided on the top of the housing. The interior of the second end cap assembly is provided with a water inlet / outlet structure. One end of the multiple water passages in the water inlet / outlet structure is connected to the outside of the second end cap assembly, and the other end of the multiple water passages in the water inlet / outlet structure is connected to the interior of the cavity.
[0011] In one embodiment, the filter element device further includes a wastewater separation structure, which is annular in shape. The bottom of the wastewater separation structure is provided with an annular snap-fit groove, which engages with the top of the reverse osmosis membrane element. The top of the wastewater separation structure abuts against the second end cap assembly. The inlet and outlet water structure includes a first water passage. The wastewater separation structure is provided with a wastewater pipe inside, one end of which is connected to the annular snap-fit groove, and the other end of which is connected to the first water passage. The wastewater pipe is used to receive wastewater flowing axially between the outer and inner walls of the reverse osmosis membrane element and to allow the wastewater to flow out of the cavity along the first water passage.
[0012] In one embodiment, the composite filter assembly further includes a pre-separation structure, wherein the end of the pre-filter away from the bottom wall is connected to the bottom of the pre-separation structure, and the top of the pre-separation structure abuts against the second end cap assembly. The pre-separation structure is annular. The pre-separation structure and the pre-filter divide the first container into a first sub-container and a second sub-container, with the first sub-container located outside the second sub-container. The water inlet / outlet structure further includes a second water passage and a third water passage. The second water passage is connected to the top of the first sub-container and is used to introduce tap water into the first sub-container. The third water passage is connected to the top of the second sub-container and is used to discharge the pre-filtered water in the second sub-container out of the chamber.
[0013] In one embodiment, the inner wall of the cavity, the outer wall of the reverse osmosis membrane element, and the outer wall of the wastewater separation structure form a second container; the inlet and outlet water structure further includes a fourth water passage, which is connected to the top of the second container and is used to introduce pre-filtered water into the second container; and / or, the inlet and outlet water structure further includes a fifth water passage, which is connected to the post-filtered water passage; the fifth water passage is used to discharge the post-filtered water in the post-filtered water passage out of the cavity.
[0014] In one embodiment, the outer side wall of the first end cap assembly is provided with a protruding structure and a sealing ring, and the first opening is provided with a circumferentially extending guide snap-fit structure; the protruding structure is used to rotate along the guide snap-fit structure to a preset angle so that the first end cap assembly snaps into the housing and the first end cap assembly is sealed with the first opening through the sealing ring; and / or, the top of the first end cap assembly is provided with a vertically extending sleeve, which engages with the bottom of the post-filter.
[0015] This utility model also proposes a water purification device, including the above-mentioned filter cartridge device.
[0016] The technical solution of this utility model adopts a filter element device, which includes a housing, a composite filter element assembly, and a first end cap assembly. The housing has an internal cavity and a first opening at the bottom. The housing has an inlet and outlet water structure. The composite filter element assembly is disposed in the cavity. The composite filter element assembly includes at least a pre-filter and a post-filter, which are detachably connected. The top of the first end cap assembly is connected to the bottom of the composite filter element assembly, and the first end cap assembly is detachably connected to the first opening to form a sealing fit.
[0017] The technical solution of this utility model involves providing a cavity inside the housing and housing a composite filter element assembly within the cavity. The housing also includes an inlet / outlet structure, allowing tap water and other water sources from outside the housing to be injected into the cavity through this structure. The water is then filtered by the pre-filter and post-filter within the composite filter element assembly before being output to the inlet / outlet structure, thus achieving water filtration. The composite filter element assembly includes at least a pre-filter and a post-filter. The pre-filter performs preliminary filtration of tap water and other water sources, primarily removing large particles such as sediment, colloids, and rust. The post-filter further filters the filtered liquid, adsorbing harmful substances such as discoloration, odor, and residual chlorine. This material improves the taste of water by employing a dual filtration system with both pre- and post-filters, thus enhancing the filtration effect on tap water and other water sources. Furthermore, a first opening is located at the bottom of the housing, detachably connected to a first end cap assembly. The composite filter element assembly is also connected to the first end cap assembly. When the composite filter element assembly needs replacement, the first end cap assembly can be disassembled to separate from the first opening, allowing the composite filter element assembly to move out of the cavity along the first opening. After replacement, the composite filter element assembly is placed back into the cavity, and the first end cap assembly is detachably connected to the first opening to form a sealed fit, ensuring a tight seal between the housing and the first end cap assembly and preventing water leakage from the cavity.
[0018] During the entire process of disassembling and replacing the composite filter element assembly, it is not necessary to separate the pre-filter and post-filter from the filter element device in multiple steps. Only the first end cap assembly needs to be disassembled and separated from the first opening, which can drive the entire composite filter element assembly out of the cavity together. This enables convenient replacement of the composite filter element assembly and reduces the complexity of disassembling the composite filter element assembly from the filter element device. Attached Figure Description
[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0020] Figure 1 A schematic diagram of the structure of an embodiment of the filter element device provided by this utility model;
[0021] Figure 2 An exploded structural diagram of an embodiment of the filter element device provided by this utility model;
[0022] Figure 3A cross-sectional view of the second end cap assembly of an embodiment of the filter cartridge device provided by this utility model;
[0023] Figure 4 A cross-sectional view of the housing of an embodiment of the filter element device provided by this utility model;
[0024] Figure 5 A schematic diagram of the water circuit principle of an embodiment of the filter element device provided by this utility model.
[0025] Explanation of icon numbers:
[0026] 1. Shell; 11. First opening; 111. Guide snap-fit structure; 12. Inlet / outlet water structure; 121. First water channel; 122. Second water channel; 123. Third water channel; 124. Fourth water channel; 125. Fifth water channel; 13. Second end cap assembly; 2. Composite filter element assembly; 21. Pre-filter; 22. Post-filter; 23. Pre- and post-filter separation structure; 231. Annular outer wall; 232. Bottom wall; 24. Inner separation structure; 241. Annular protrusion; 25. Pre-filter separation structure; 3. First end cap assembly; 31. Protrusion structure; 32. Connecting pipe; 4. Reverse osmosis membrane element; 5. Wastewater separation structure.
[0027] 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
[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.
[0029] 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 specific posture. If the specific posture changes, the directional indicators will also change accordingly.
[0030] Furthermore, if the embodiments of this utility model 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 where both A and B are satisfied simultaneously. 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 by this utility model.
[0031] Water purification equipment typically includes a filter cartridge unit. The filter cartridge's main function is to filter tap water and other water sources to improve the quality of the filtered water. As a crucial component of water purification equipment, the filter cartridge is usually not exposed but is typically housed inside the filter cartridge unit. After a period of use, a large amount of dirt and impurities will accumulate on the filter cartridge, requiring disassembly for cleaning or replacement.
[0032] However, the current filter cartridge devices are relatively complicated to disassemble, especially when composite filter cartridges are used. It may be necessary to separate the different filters in the composite filter cartridge from the filter cartridge device in multiple steps, which is quite complicated and causes inconvenience for users to disassemble and replace the filter cartridges.
[0033] Therefore, there is an urgent need for a new type of filter element device to solve the problem of the relatively complex disassembly operation required to remove the composite filter element from the filter element device.
[0034] To address the aforementioned problems, this utility model proposes a filter element device.
[0035] Please see Figures 1 to 5 In one embodiment of the present invention, the filter element device includes a housing 1, a composite filter element assembly 2, and a first end cap assembly 3. The housing 1 has a cavity inside, a first opening 11 at the bottom of the housing 1, and an inlet / outlet structure 12. The composite filter element assembly 2 is disposed in the cavity. The composite filter element assembly 2 includes at least a pre-filter 21 and a post-filter 22, which are detachably connected. The top of the first end cap assembly 3 is connected to the bottom of the composite filter element assembly 2, and the first end cap assembly 3 is detachably connected to the first opening 11 to form a sealing fit.
[0036] The technical solution of this utility model is achieved by providing a cavity inside the housing 1 and placing the composite filter element assembly 2 inside the cavity. The housing 1 also has an inlet / outlet structure 12, allowing tap water and other water sources outside the housing 1 to be injected into the cavity through the inlet / outlet structure 12. The water is then filtered by the pre-filter 21 and post-filter 22 in the composite filter element assembly 2 before being output to the inlet / outlet structure 12, thus achieving water filtration. The composite filter element assembly 2 includes at least a pre-filter 21 and a post-filter 22. The pre-filter 21 performs preliminary filtration of tap water and other water sources, primarily removing large particulate impurities such as sediment, colloids, and rust. The post-filter 22 further filters the filtered liquid, adsorbing harmful substances such as discoloration, odor, and residual chlorine, improving the taste of the water. By comprehensively employing the pre-filter 21 and post-filter 22 for dual filtration, the filtration effect on tap water and other water sources is improved. Furthermore, by providing a first opening 11 at the bottom of the housing 1, the first opening 11 is detachably connected to the first end cap assembly 3, and the composite filter element assembly 2 is connected to the first end cap assembly 3, when the composite filter element assembly 2 needs to be replaced, the first end cap assembly 3 can be disassembled to separate from the first opening 11, thereby driving the composite filter element assembly 2 to move out of the cavity along the first opening 11; after the composite filter element assembly 2 is replaced, it is placed back into the cavity, and the first end cap assembly 3 is detachably connected to the first opening 11 to form a sealed fit, ensuring the sealing between the housing 1 and the first end cap assembly 3, and preventing water from leaking out of the cavity. During the entire process of disassembling and replacing the composite filter element assembly 2, it is not necessary to separate the pre-filter 21 and post-filter 22 from the filter element device in multiple steps. Only the first end cap assembly 3 needs to be disassembled and separated from the first opening 11, which can drive the entire composite filter element assembly 2 out of the cavity together, thereby realizing the convenient replacement of the composite filter element assembly 2 and reducing the complexity of disassembling the composite filter element assembly 2 from the filter element device.
[0037] In an embodiment of this utility model, the composite filter assembly 2 further includes a front and rear partition structure 23 and an inner partition structure 24; the front and rear partition structure 23 has an annular outer wall 231 and a bottom wall 232, and the bottom wall 232 has a second opening; the inner partition structure 24 is tubular, and the bottom end of the inner partition structure 24 is connected to the opening of the second opening; the annular outer wall 231, the bottom wall 232, and the outer tube wall of the inner partition structure 24 form a first container; the pre-filter 21 is tubular, and the pre-filter 21 is disposed in the first container, and there is a first gap arranged radially between the outer wall of the pre-filter 21 and the annular outer wall 231, and there is a second gap arranged radially between the inner wall of the pre-filter 21 and the outer tube wall of the inner partition structure 24.
[0038] In the above structure, the annular outer wall 231, bottom wall 232 of the front and rear partition structure 23, and the outer tube wall of the inner partition structure 24 form a first container, which is annular; and the pre-filter 21 is set as a tube, so that the tubular pre-filter 21 can be accommodated in the annular first container, thereby separating the pre-filter 21 from the rear filter 22. Furthermore, by having a first radially arranged gap between the outer wall of the pre-filter 21 and the annular outer wall 231, and a second radially arranged gap between the inner wall of the pre-filter 21 and the outer tube wall of the inner partition structure 24, when tap water is introduced between the outer wall of the pre-filter 21 and the annular outer wall 231, the tap water flows sequentially through the outer wall and inner wall of the pre-filter 21 and is filtered into pre-filtered water, which is accommodated between the inner wall of the pre-filter 21 and the outer tube wall of the inner partition structure 24, thereby achieving the separation of tap water and pre-filtered water. The length of the first gap and the length of the second gap can be the same or different. The lengths of the first gap and the second gap are not limited here.
[0039] In addition, in the above structure, as an optional implementation, the bottom end of the inner partition structure 24 is detachably connected to the opening of the second opening. The outer tube wall of the inner partition structure 24 is also provided with a radially extending annular protrusion 241. The annular protrusion 241 is located above the bottom wall 232 of the front and rear partition structures 23. The pre-filter 21 is disposed in the first container, and the bottom end of the pre-filter 21 abuts against the upper side of the annular protrusion 241. In this way, by having the bottom end of the pre-filter 21 abut against the upper side of the annular protrusion 241, when the composite filter assembly 2 is disassembled to the outside of the cavity, the user can separate the inner partition structure 24 from the front and rear partition structures 23. During the process of disassembling the inner partition structure 24, the annular protrusion 241 will drive the pre-filter 21 out of the first container, reducing the difficulty for the user to disassemble the pre-filter 21 from the first container.
[0040] In the above embodiments, the bottom end of the inner partition structure 24 and the opening of the second opening can adopt various optional detachable connection methods. For example, the opening of the second opening is provided with a sleeve structure extending vertically, which is sleeved and fitted with the bottom end of the pre-filter 21; or, one of the opening of the second opening and the bottom end of the pre-filter 21 is provided with a snap-fit protrusion and the other is provided with a snap-fit groove, and the second opening is snap-fitted with the pre-filter 21. The detachable connection methods between the bottom end of the inner partition structure 24 and the opening of the second opening will not be described in detail here.
[0041] In an embodiment of this utility model, the post-filter 22 is tubular, and the side of the bottom wall 232 away from the inner partition structure 24 is detachably connected to the top of the post-filter 22. The inner wall of the post-filter 22, the second opening, and the inner tube wall of the inner partition structure 24 form a post-filter water channel. The bottom end of the post-filter 22 is detachably connected to the top of the first end cap assembly 3.
[0042] In the above structure, the side of the bottom wall 232 away from the inner partition structure 24 is detachably connected to the top of the post-filter 22, and the bottom of the post-filter 22 is detachably connected to the top of the first end cap assembly 3. Thus, when the first end cap assembly 3 is disassembled, it moves the post-filter 22, thereby moving the bottom wall 232 of the front and rear partition structures 23, the entire first container, and the pre-filter 21 located within the first container, thus moving the entire composite filter assembly 2 from the first opening 11 to the outside of the cavity. Furthermore, liquid outside the outer wall of the post-filter 22 can be filtered into post-filtered water after passing through the outer and inner walls of the post-filter 22 in sequence. Since the inner wall of the post-filter 22, the second opening, and the inner tube wall of the inner partition structure 24 form a post-filtered water path, the post-filtered water inside the inner wall of the post-filter 22 is contained within this path, preventing the post-filtered water from contacting other liquids and becoming contaminated.
[0043] To prevent liquid from seeping between the post-filter water path and the first container, thus avoiding liquid contamination, the bottom end of the inner partition structure 24 is sealed to the opening of the second opening. Various sealing configurations are possible between the inner partition structure 24 and the second opening. For example, if the second opening has a vertically extending sleeve structure that engages with the bottom end of the pre-filter 21, the sleeve structure and / or the bottom end of the pre-filter 21 may have a sealing element. While the sleeve structure engages with the bottom end of the pre-filter 21, a sealing fit is formed between the sleeve structure and the bottom end of the pre-filter 21 through the sealing element. This sealing element can be either a sealing ring or a sealing packing.
[0044] To further filter impurities in the pre-filtered water, in this embodiment of the invention, the filter element device further includes a reverse osmosis membrane element 4, which is tubular. The reverse osmosis membrane element 4 is disposed in the cavity and sleeved on the outer periphery of the composite filter element assembly 2. The bottom of the reverse osmosis membrane element 4 abuts against the bottom of the housing 1. The bottom of the inner wall of the reverse osmosis membrane element 4 is used to engage with the first end cap assembly 3. The outer wall of the reverse osmosis membrane element 4 is used to allow liquid located outside the outer wall of the reverse osmosis membrane element 4 to flow between the outer wall and the inner wall of the reverse osmosis membrane element 4. The inner wall of the reverse osmosis membrane element 4 is used to filter the liquid located between the outer wall and the inner wall of the reverse osmosis membrane element 4, so that the filtered reverse osmosis pure water flows through the inner wall of the reverse osmosis membrane element 4 to the post-filter 22, and the remaining wastewater moves axially between the outer wall and the inner wall of the reverse osmosis membrane element 4.
[0045] In the above structure, a reverse osmosis membrane element 4 (i.e., RO membrane element, Reverse Osmosis membrane element) is provided in the cavity and sleeved on the outside of the composite filter element assembly 2. When liquid located on the outside of the outer wall of the reverse osmosis membrane element 4 (such as pre-filtered water) is introduced into the outside of the outer wall of the reverse osmosis membrane element 4, the liquid located on the outside of the outer wall of the reverse osmosis membrane element 4 will pass through the outer wall and inner wall of the reverse osmosis membrane element 4 in sequence and be filtered into reverse osmosis pure water (i.e., RO pure water). The reverse osmosis pure water will flow to the post-filter 22 and be filtered by the post-filter 22. Since the reverse osmosis membrane element 4 can only allow water molecules and a small amount of mineral ions to pass through its inner wall, impurities such as bacteria, viruses, heavy metal ions, and organic matter are trapped between the outer wall and inner wall of the reverse osmosis membrane element 4 and move axially between the outer wall and inner wall of the reverse osmosis membrane element 4 with the wastewater. Thus, this filter device incorporates a reverse osmosis membrane element 4 outside the pre-filter 21 and post-filter 22 of the composite filter assembly 2. First, the pre-filter 21 performs preliminary filtration of tap water and other water sources, removing large particles such as sediment, colloids, and rust to obtain pre-filtered water. Then, the reverse osmosis membrane element 4 filters the pre-filtered water, removing mineral ions such as calcium and magnesium, and further removing residual chlorine and odors, thereby reducing the hardness of the pre-filtered water and improving its taste to obtain reverse osmosis pure water. Finally, the post-filter 22 filters the reverse osmosis pure water, further adsorbing harmful substances such as discoloration, odor, and residual chlorine, further improving the taste to obtain the final post-filtered water.
[0046] To solve the problem of communication between different liquids inside the cavity and the outside of the shell 1, in an embodiment of this utility model, a second end cap assembly 13 is provided on the top of the shell 1, and a water inlet / outlet structure 12 is provided inside the second end cap assembly 13. One end of the multiple water channels in the water inlet / outlet structure 12 is connected to the outside of the second end cap assembly 13, and the other end of the multiple water channels in the water inlet / outlet structure 12 is connected to the inside of the cavity.
[0047] In the above structure, by providing a second end cap assembly 13 on the top of the housing 1, and providing an inlet / outlet water structure 12 inside the second end cap assembly 13, the interior of the cavity is connected to the exterior of the second end cap assembly 13 through multiple water passages in the inlet / outlet water structure 12, achieving the effect of transferring different water bodies between the cavity and the exterior of the housing 1. As an optional implementation, the second end cap assembly 13 can be fixedly connected to the top of the housing 1 via spin welding, avoiding gaps at the connection between the top of the housing 1 and the second end cap assembly 13, thus preventing water leakage from this connection. Furthermore, the ends of the multiple water passages in the inlet / outlet water structure 12 facing the exterior of the second end cap assembly 13 can be provided with multiple connectors, each connector corresponding to a different water passage, allowing each water passage to connect to an external water pipe through the connector. Further, to prevent water leakage from the connection between the connector and the water passage, sealing rings can be provided at the ends of the water passages and / or on the connectors, allowing the water passages to form a sealed fit with the connectors through the sealing rings.
[0048] In an embodiment of this utility model, the filter element device further includes a wastewater separation structure 5, which is annular in shape. The bottom of the wastewater separation structure 5 is provided with an annular snap-fit groove, which snaps into the top of the reverse osmosis membrane element 4. The top of the wastewater separation structure 5 abuts against the second end cap assembly 13. The inlet and outlet water structure 12 includes a first water passage 121. The wastewater separation structure 5 is provided with a wastewater pipe inside, one end of which is connected to the annular snap-fit groove, and the other end of which is connected to the first water passage 121. The wastewater pipe is used to receive wastewater flowing axially between the outer and inner walls of the reverse osmosis membrane element 4 and to allow the wastewater to flow out of the cavity along the first water passage 121.
[0049] In the above structure, by providing a reverse osmosis membrane water channel separation structure, an annular snap-fit groove is provided at the bottom of the reverse osmosis membrane water channel separation structure, and the annular snap-fit groove is snap-fitted with the top of the reverse osmosis membrane element 4, thereby preventing wastewater from overflowing outside the reverse osmosis membrane element 4 after moving axially, ensuring that the pre-filtered water located outside the reverse osmosis membrane element 4 and the reverse osmosis pure water located inside the reverse osmosis membrane element 4 are not contaminated by wastewater; in addition, by providing a wastewater pipe in the reverse osmosis membrane water channel separation structure, and allowing the top of the reverse osmosis membrane element 4 to be connected to the first water channel 121 through the wastewater pipe, the wastewater located between the outer wall and the inner wall of the reverse osmosis membrane element 4 moves axially sequentially to the wastewater pipe and the first water channel 121, and is finally discharged outside the cavity, thus preventing a large amount of wastewater from accumulating and overflowing between the outer wall and the inner wall of the reverse osmosis membrane element 4.
[0050] In an embodiment of this utility model, the composite filter assembly 2 further includes a pre-separation structure 25. The end of the pre-filter 21 away from the bottom wall 232 is connected to the bottom of the pre-separation structure 25, and the top of the pre-separation structure 25 abuts against the second end cap assembly 13. The pre-separation structure 25 is annular. The pre-separation structure 25 and the pre-filter 21 divide the first container into a first sub-container and a second sub-container. The first sub-container is located outside the second sub-container. The water inlet / outlet structure 12 further includes a second water passage 122 and a third water passage 123. The second water passage 122 is connected to the top of the first sub-container and is used to introduce tap water into the first sub-container. The third water passage 123 is connected to the top of the second sub-container and is used to discharge the pre-filtered water in the second sub-container out of the cavity.
[0051] In the above structure, a pre-separation structure 25 is provided, and the pre-separation structure 25 and the pre-filter 21 divide the first container into a first sub-container and a second sub-container. The second water passage 122 is connected to the top of the first sub-container, so that tap water can be introduced into the first sub-container through the second water passage 122. The tap water is filtered into pre-filtered water after passing through the outer wall and inner wall of the pre-filter 21 in sequence. The filtered pre-filtered water continuously accumulates in the second sub-container. Since the third water passage 123 is connected to the top of the second sub-container, the pre-filtered water will be discharged out of the cavity along the third water passage 123 after filling the second sub-container. Furthermore, thanks to the separation of the first container by the pre-separation structure 25 and the pre-filter 21, the tap water entering the first sub-container will not come into contact with the pre-filtered water discharged from the second sub-container, thus preventing the pre-filtered water from being contaminated by the tap water. Thanks to the aforementioned post-filtration water path, the post-filtration water path prevents the pre-filtered water in the second sub-container from coming into contact with the post-filtered water in the post-filtration water path, thus preventing the pre-filtered water from contaminating the post-filtered water. Additionally, as an optional implementation, a sealing element is provided between the top of the inner wall of the reverse osmosis membrane element 4 and the outer wall of the pre- and post-separation structure 23, forming a sealed fit. This prevents the tap water injected into the first sub-container from overflowing between the pre- and post-separation structure 23 and the reverse osmosis membrane element 4, thus preventing contamination of the reverse osmosis pure water. This sealing element can be a sealing ring.
[0052] In an embodiment of this utility model, the inner wall of the cavity, the outer wall of the reverse osmosis membrane element 4, and the outer wall of the wastewater separation structure 5 form a second container; the inlet / outlet water structure 12 further includes a fourth water passage 124, which is connected to the top of the second container and is used to introduce pre-filtered water into the second container; and / or, the inlet / outlet water structure 12 further includes a fifth water passage 125, which is connected to the post-filtered water passage; the fifth water passage 125 is used to discharge the post-filtered water in the post-filtered water passage out of the cavity.
[0053] In the above structure, a fourth water passage 124 is provided and connected to the top of the second container, so that pre-filtered water is injected into the second container through the fourth water passage 124; in addition, by forming the second container with the inner wall of the cavity, the outer wall of the reverse osmosis membrane element 4, and the outer wall of the reverse osmosis membrane water passage separation structure, the pre-filtered water injected into the second container is prevented from coming into contact with the wastewater between the outer and inner walls of the reverse osmosis membrane element 4; and by providing a fifth water passage 125, the post-filtered water in the post-filtration water passage is discharged out of the cavity through the fifth water passage 125.
[0054] In the above structure, as an optional implementation, the end of the fourth water passage 124 facing the outside of the housing 1 is connected to the end of the third water passage 123 facing the outside of the housing 1 via a pipe, thereby conveying the pre-filtered water output from the third water passage 123 to the fourth water passage 124 and allowing the pre-filtered water to enter the second container for filtration by the reverse osmosis membrane element 4. As another optional, and preferred, implementation, the end of the third water passage 123 facing the outside of the housing 1 is connected to other components in the water purification equipment via a connector or pipe. These other components are then connected to the fourth water passage 124 via other pipes or connectors, thereby conveying the pre-filtered water output from the third water passage 123 to other components of the water purification equipment before being conveyed to the fourth water passage 124, allowing the pre-filtered water to enter the second container and be filtered by the reverse osmosis membrane element 4. Furthermore, as an optional implementation, the end of the fifth water passage 125 facing the outside of the housing 1 is connected to a faucet via a connector or pipe, allowing the user to obtain post-filtered water by turning the faucet.
[0055] In an embodiment of this utility model, the outer side wall of the first end cap assembly 3 is provided with a protruding structure 31 and a sealing ring, and the first opening 11 is provided with a guide snap-fit structure 111 extending circumferentially; the protruding structure 31 is used to rotate along the guide snap-fit structure 111 to a preset angle so that the first end cap assembly 3 snaps into the housing 1 and the first end cap assembly 3 is sealed with the first opening 11 through the sealing ring; and / or, the top of the first end cap assembly 3 is provided with a sleeve 32 extending vertically, and the sleeve 32 is sleeved into the bottom of the post-filter 22.
[0056] In the above structure, by rotating the protruding structure 31 on the outer wall of the first end cap assembly 3 along the guide snap-fit structure 111 on the first opening 11 to a preset angle, the first end cap assembly 3 is snapped and locked to the housing 1, and the first end cap assembly 3 is sealed to the first opening 11 by a sealing ring. This rotational locking connection method facilitates connection and disassembly, and the sealing ring improves the sealing performance between the housing 1 and the first end cap assembly 3, ensuring the sealing performance inside the cavity. In addition, by providing a vertically extending sleeve 32 on the top of the first end cap assembly 3, and by fitting the sleeve 32 into the bottom of the post-filter 22, a detachable connection between the post-filter 22 and the first end cap assembly 3 is achieved, facilitating the disassembly and replacement of the post-filter 22.
[0057] Furthermore, in the above structure, as an optional implementation, the outer wall of the first end cap assembly 3 is provided with a plurality of sealing rings. A portion of the sealing rings are disposed between the outer wall of the first end cap assembly 3 and the opening of the first opening 11, so that the first end cap assembly 3 and the first opening 11 are sealed together. Another portion of the sealing rings are disposed between the outer wall of the first end cap assembly 3 and the bottom of the inner wall of the reverse osmosis membrane element 4, so that the first end cap assembly 3 and the reverse osmosis membrane element 4 are sealed together, thereby preventing wastewater inside the reverse osmosis membrane element 4 from permeating into the reverse osmosis pure water located inside the inner wall of the reverse osmosis membrane element 4.
[0058] For illustrative purposes, the water circuit principle and water flow direction of this filter element device are explained in this embodiment. Please refer to [link / reference]. Figures 1 to 5 , specifically:
[0059] First, tap water is introduced into the first sub-container through the second water passage 122. After entering the first sub-container, the tap water passes through the outer and inner walls of the pre-filter 21 in sequence and is filtered into pre-filtered water located in the second sub-container.
[0060] Afterwards, the pre-filtered water in the second sub-container gradually accumulates and moves along the axial direction. The pre-filtered water enters the third water path 123 and is transmitted to other components of the water purification equipment by the external pipeline. Then, the pre-filtered water is transmitted from the other components to the fourth water path 124 through the pipeline, so that the pre-filtered water enters the second container.
[0061] Then, the pre-filtered water in the second container is filtered by the reverse osmosis membrane element 4 to obtain reverse osmosis pure water located inside the inner wall of the reverse osmosis membrane element 4, and wastewater located between the outer and inner walls of the reverse osmosis membrane element 4; wherein, the wastewater moves axially between the outer and inner walls of the reverse osmosis membrane element 4, enters the first water path 121 and is finally discharged from the cavity; while the reverse osmosis pure water flows to the post-filter 22 and is filtered to obtain post-filtered water located in the post-filtration water path;
[0062] Finally, the post-filtered water flows along the post-filter water path to the fifth water path 125, and eventually flows to the faucet.
[0063] It should be noted that the above examples are only for understanding this utility model and do not constitute a limitation on the filter element device of this utility model. Any simple modifications based on this technical concept are within the protection scope of this utility model.
[0064] This utility model also proposes a water purification device, which includes a filter element device. The specific structure of the filter element device 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.
[0065] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.
Claims
1. A filter cartridge device, characterized in that, include: The shell has an internal cavity, a first opening at the bottom, and a water inlet / outlet structure. A composite filter element assembly is disposed within the cavity; the composite filter element assembly includes at least a pre-filter and a post-filter, the pre-filter and the post-filter being detachably connected. A first end cap assembly, the top of which is connected to the bottom of the composite filter element assembly, is detachably connected to the first opening and forms a sealing fit.
2. The filter element device as described in claim 1, characterized in that, The composite filter assembly also includes a front and rear partition structure and an inner partition structure; The front and rear partition structure has an annular outer wall and a bottom wall, and the bottom wall has a second opening; the inner partition structure is tubular, and the bottom end of the inner partition structure is connected to the opening of the second opening; the annular outer wall, the bottom wall, and the outer tube wall of the inner partition structure form a first container; The pre-filter is tubular and is disposed inside the first container. There is a first gap arranged radially between the outer wall of the pre-filter and the annular outer wall, and there is a second gap arranged radially between the inner wall of the pre-filter and the outer tube wall of the inner partition structure.
3. The filter element device as described in claim 2, characterized in that, The post-filter is tubular, and the bottom wall away from the inner partition structure is detachably connected to the top of the post-filter. The inner wall of the post-filter, the second opening, and the inner tube wall of the inner partition structure form a post-filter water path. The bottom end of the post-filter is detachably connected to the top of the first end cap assembly.
4. The filter element device as described in claim 3, characterized in that, The filter cartridge device also includes a reverse osmosis membrane element, which is tubular in shape; The reverse osmosis membrane element is disposed in the cavity, the reverse osmosis membrane element is sleeved on the outer periphery of the composite filter element assembly, the bottom of the reverse osmosis membrane element abuts against the bottom of the housing, and the bottom of the inner sidewall of the reverse osmosis membrane element is used to fit with the first end cap assembly. The outer wall of the reverse osmosis membrane element is used to allow liquid located outside the outer wall of the reverse osmosis membrane element to flow between the outer wall and the inner wall of the reverse osmosis membrane element; the inner wall of the reverse osmosis membrane element is used to filter the liquid located between the outer wall and the inner wall of the reverse osmosis membrane element, so that the filtered reverse osmosis pure water flows through the inner wall of the reverse osmosis membrane element to the post-filter, and the remaining wastewater moves axially between the outer wall and the inner wall of the reverse osmosis membrane element.
5. The filter element device as described in claim 4, characterized in that, The top of the housing is provided with a second end cap assembly, and the interior of the second end cap assembly is provided with the water inlet and outlet structure. One end of the multiple water passages in the water inlet and outlet structure is connected to the outside of the second end cap assembly, and the other end of the multiple water passages in the water inlet and outlet structure is connected to the interior of the cavity.
6. The filter element device as described in claim 5, characterized in that, The filter element device also includes a wastewater separation structure, which is annular in shape. The bottom of the wastewater separation structure is provided with an annular snap-fit groove, which snaps into the top of the reverse osmosis membrane element. The top of the wastewater separation structure abuts against the second end cap assembly. The water inlet and outlet structure includes a first water passage; the wastewater separation structure is provided with a wastewater pipe inside, one end of the wastewater pipe is connected to the annular snap-fit groove, and the other end of the wastewater pipe is connected to the first water passage; The wastewater pipeline is used to receive wastewater flowing axially between the outer and inner walls of the reverse osmosis membrane element, and to allow the wastewater to flow out of the cavity along the first water path.
7. The filter element device as described in claim 6, characterized in that, The composite filter assembly also includes a pre-separation structure, wherein the end of the pre-filter away from the bottom wall is connected to the bottom of the pre-separation structure, the top of the pre-separation structure abuts against the second end cap assembly, and the pre-separation structure is annular; The pre-separation structure and the pre-filter divide the first container into a first sub-container and a second sub-container, with the first sub-container located outside the second sub-container; The water inlet and outlet structure also includes a second water passage and a third water passage; The second water passage is connected to the top of the first sub-container, and the second water passage is used to supply tap water to the first sub-container; The third water passage is connected to the top of the second sub-container, and the third water passage is used to discharge the pre-filtered water in the second sub-container out of the cavity.
8. The filter element device as described in claim 6, characterized in that, The inner wall of the cavity, the outer wall of the reverse osmosis membrane element, and the outer wall of the wastewater separation structure form a second container; the inlet and outlet water structure also includes a fourth water passage, which is connected to the top of the second container and is used to introduce pre-filtered water into the second container; And / or, the water inlet / outlet structure further includes a fifth water channel, which is connected to the post-filter water channel; the fifth water channel is used to discharge the post-filtered water in the post-filter water channel out of the cavity.
9. The filter element device according to any one of claims 1 to 8, characterized in that, The outer side wall of the first end cap assembly is provided with a protruding structure and a sealing ring, and the first opening is provided with a guide snap-fit structure extending in the circumferential direction; the protruding structure is used to rotate along the guide snap-fit structure to a preset angle so that the first end cap assembly snaps into the housing and the first end cap assembly is sealed with the first opening through the sealing ring. And / or, the top of the first end cap assembly is provided with a vertically extending sleeve that engages with the bottom of the post-filter.
10. A water purification device, characterized in that, Includes the filter cartridge device as described in any one of claims 1 to 9.