Filter element and water purification equipment

Abstract

The utility model discloses a filter element and water purification equipment, and relates to the technical field of water purification, the filter element comprises a first filter assembly and a second filter assembly, the first filter assembly comprises a first filter bottle and a first filter element, the first filter element is arranged in the first filter bottle, and a first water inlet channel is formed between the first filter element and the inner wall of the first filter bottle; a first water outlet channel is formed in the side, away from the water inlet channel, of the first filter element, and raw water is filtered by the first filter element to obtain first filtered fluid; the first water outlet end of the first water outlet channel is used for outputting first filtering fluid; the second filter assembly comprises a second filter bottle, a second filter element and a central pipe, the first filter assembly is arranged in the second filter bottle, a second water inlet channel is formed between the inner wall of the second filter bottle and the second filter element, a wastewater channel is formed between the second filter element and the outer wall of the first filter bottle, and the central pipe is arranged in the middle of the first filter element; a second water outlet channel is formed in the central pipe; the second water outlet end of the first water outlet channel is used for being communicated with the second water inlet channel through a connecting piece.

Description

Technical Field

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

[0002] Water purification equipment is widely used in daily life to eliminate pollution and its impact on water quality from the source and transportation processes, ensuring safe drinking water. In residential water use, different applications require different water quality after filtration, depending on the intended use. For example, applications with high water quality requirements (e.g., obtaining drinking water after filtration) often require the raw water (e.g., municipal tap water) to undergo a high degree of filtration; while applications with lower water quality requirements do not require such filtration. If all raw water filtered by the water purification equipment has the same quality, it is impossible to simultaneously meet both requirements. If all raw water undergoes a high degree of filtration, it is unnecessary for applications with lower water quality requirements, unnecessarily increasing the filtration load on the water purifier; conversely, if all raw water undergoes only a low degree of filtration, the filtered water quality will not meet the requirements of applications with higher water quality requirements. Utility Model Content

[0003] The main purpose of this application is to propose a filter element and a water purification device, which aims to solve the problem that existing water purification devices cannot adapt to different water filtration levels according to the water quality requirements.

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

[0005] The first filtration assembly includes a first filter bottle and a first filter element. The first filter element is disposed inside the first filter bottle. A first water inlet channel is formed between the first filter element and the inner wall of the first filter bottle. A first water outlet channel is formed on the side of the first filter element away from the water inlet channel. Raw water is filtered by the first filter element to obtain a first filtered fluid. The first water outlet end of the first water outlet channel is used to output the first filtered fluid.

[0006] The second filtration assembly includes a second filter bottle, a second filter element, and a central tube. The first filtration assembly is disposed inside the second filter bottle. A second water inlet channel is formed between the inner wall of the second filter bottle and the second filter element, and a wastewater channel is formed between the second filter element and the outer wall of the first filter bottle. The central tube is disposed in the middle of the first filter element, and a second water outlet channel is formed inside the central tube. The second water outlet end of the first water outlet channel is used to communicate with the second water inlet channel through a connector. The first filtered fluid is filtered by the second filter element to obtain a second filtered fluid, and the second water inlet channel is used to output the second filtered fluid.

[0007] In one embodiment, the first filter bottle has a first cavity and a second cavity inside, and the first filter element is disposed in the first cavity; the second filtration assembly further includes a third filter element, which is disposed in the second cavity, and a first water passage is formed in the middle of the third filter element, which is connected to the second water outlet passage; the second cavity is connected to the second water inlet passage, and the second filtered fluid flows to the second cavity.

[0008] In one embodiment, the central tube includes a water guide pipe and an installation cylinder, the water guide pipe having a second water outlet channel inside; the connection between the installation cylinder and the water guide pipe has an abutment protrusion, the abutment protrusion being sealed to the inner wall of the first filter bottle, so that the interior of the first filter bottle is divided to form the first cavity and the second cavity; the third filter element is disposed inside the installation cylinder, the installation cylinder communicating with the second cavity, and the second cavity communicating with the second water inlet channel.

[0009] In one embodiment, the mounting cylinder has a plurality of first through holes on its side wall, and the interior of the mounting cylinder communicates with the second cavity through the first through holes; the second cavity has a second through hole on its side wall, and the second cavity communicates with the second water inlet channel through the second through hole; and / or,

[0010] The diameter of the mounting cylinder is larger than the diameter of the water guide pipe. The first filter element is sleeved on the outer surface of the water guide pipe, and one end of the first filter element abuts against the end of the mounting cylinder that connects to the water guide pipe; and / or,

[0011] The water guide pipe and the mounting cylinder are an integral structure.

[0012] In one embodiment, the second filter bottle is provided with a first water inlet, a first water outlet, a second water inlet, a second water outlet, and a wastewater outlet. The first water inlet is connected to the first water inlet channel, and the first water outlet is connected to the first water outlet channel. The second water inlet is connected to the second water inlet channel, the second water outlet is connected to the second water outlet channel, and the wastewater outlet is connected to the wastewater channel.

[0013] In one embodiment, the second filter bottle includes a bottle body and an end cap. The bottle body has a third cavity with an opening, and the end cap is connected to the end of the bottle body with the opening. The first filter assembly is disposed in the third cavity, and the first inlet, the first outlet, the second inlet, and the second outlet are disposed on the end cap; and / or,

[0014] The filter element also includes a connector, and the connector further includes a first valve body. The first interface of the first valve body is connected to the first water outlet, the first interface of the first valve body is connected to the second water outlet, the third interface of the first valve body is connected to the first water outlet, the fourth interface of the first valve body is connected to the second water inlet, and the fifth interface of the first valve body is connected to the second water outlet. The first interface is connected to the third interface, the second interface is connected to the fourth interface, and the fifth interface is connected to the third interface.

[0015] In one embodiment, the second filter element includes a reverse osmosis membrane and a first filter element cover. The first filter element cover is connected to one end of the reverse osmosis membrane. The inner wall of the end cover has a first extension section extending toward the first filter element cover. The first filter element cover is sealed to the first extension section. A second water passage is formed between the first extension section and the inner wall of the end cover. The second water passage is connected to the second water inlet channel and the second water inlet, respectively.

[0016] In one embodiment, the first filter element includes a filter media layer and a second filter element cover. The second filter element cover is connected to one end of the filter media layer. The inner wall of the end cover has a second extension section extending toward the second filter element cover. The second filter element cover is sealed to the second extension section. A third water passage is formed between the second extension section and the first extension section. The second water passage is connected to the first water inlet channel and the first water inlet, respectively.

[0017] In one embodiment, the inner wall of the end cap has a third extension section extending toward the central tube, and the end of the central tube is sealed to the third extension section; a fourth water passage is formed between the third extension section and the second extension section, and the fourth water passage is connected to the first water outlet channel and the first water outlet; a fifth water passage is formed in the middle of the third extension section, and the fifth water passage is connected to the second water outlet channel and the second water outlet respectively.

[0018] This application also proposes a water purification device, including the filter element as described above.

[0019] The technical solution of this application forms a multi-stage filtration function by setting a first filter component and a second filter component in the filter element. This allows raw water to pass through some or all of the filter components in the multi-stage filtration system, achieving different degrees of filtration depending on the intended use, all through a single filter element. This avoids mixing of fluids with different filtration levels and allows for the output of fluids with different filtration levels according to the water quality requirements. Specifically, raw water enters through the first inlet channel, and after filtration by the first filter element, forms the first filtered fluid. This first filtered fluid can be directly output from the first outlet end of the first outlet channel. The first filtered fluid is suitable for applications with low water quality requirements. Alternatively, if higher water quality is required, a connector can be used to connect the second outlet end of the first outlet channel to the second inlet channel, allowing the first filtered fluid to continue flowing from the second outlet end of the first outlet channel into the second inlet channel. After further filtration by the second filter element, it forms the second filtered fluid. The second filtered fluid is output through the second outlet channel and is suitable for applications with higher water quality requirements. This filter cartridge can be used with one or two filter components to filter water according to different water quality requirements, thereby outputting fluids with different degrees of filtration. This helps to optimize resource use, reduce unnecessary filtration steps, and meet water quality requirements in different scenarios. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the structure of an embodiment of the filter element provided in this application;

[0022] Figure 2 This is a partial structural diagram of an embodiment of the filter element provided in this application;

[0023] Figure 3 This is an exploded structural diagram of an embodiment of the filter element provided in this application.

[0024] Explanation of icon numbers:

[0025] 1. First filter assembly; 11. First filter bottle; 111. First chamber; 112. Second chamber; 12. First filter element; 121. Filter media layer; 122. Second filter element cover; 13. First water inlet channel; 14. First water outlet channel; 2. Second filter assembly; 21. Second filter bottle; 211. Bottle body; 212. End cap; 2121. First extension section; 2122. Second extension section; 2123. Third extension section; 2124. Second filter element Water channel; 2125, Third water passage; 2126, Fourth water passage; 2127, Fifth water passage; 22, Second filter element; 221, Reverse osmosis membrane; 222, First filter element cover; 23, Central tube; 231, Water guide pipe; 232, Mounting cylinder; 2321, First through hole; 233, Abutting protrusion; 24, Second water inlet channel; 25, Second water outlet channel; 26, Third filter element; 261, First water passage; 27, Wastewater channel.

[0026] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0027] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0028] It should be noted that if the embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0029] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0030] Water purification equipment is widely used in daily life to eliminate pollution and its impact on water quality from the source and transportation processes, ensuring safe drinking water. In residential water use, different applications require different water quality after filtration, depending on the intended use. For example, applications with high water quality requirements (e.g., obtaining drinking water after filtration) often require the raw water (e.g., municipal tap water) to undergo a high degree of filtration; while applications with lower water quality requirements do not require such filtration. If all raw water filtered by the water purification equipment has the same quality, it is impossible to simultaneously meet both requirements. If all raw water undergoes a high degree of filtration, it is unnecessary for applications with lower water quality requirements, unnecessarily increasing the filtration load on the water purifier; conversely, if all raw water undergoes only a low degree of filtration, the filtered water quality will not meet the requirements of applications with higher water quality requirements.

[0031] To address the aforementioned problems, this application proposes a filter element.

[0032] Please see Figures 1 to 3 In one embodiment of this application, the filter element includes a first filter assembly 1 and a second filter assembly 2. The first filter assembly 1 includes a first filter bottle 11 and a first filter element 12. The first filter element 12 is disposed inside the first filter bottle 11, and a first water inlet channel 13 is formed between the inner walls of the first filter element 12 and the first filter bottle 11. A first water outlet channel 14 is formed on the side of the first filter element 12 away from the water inlet channel. Raw water is filtered by the first filter element 12 to obtain a first filtered fluid. The first water outlet end of the first water outlet channel 14 is used to output the first filtered fluid. The second filter assembly 2 includes a second filter bottle 21 and a second filter element 22. The filter element 22 and the central tube 23 are arranged in the second filter bottle 21. The first filter assembly 1 is disposed inside the second filter bottle 21. The inner wall of the second filter bottle 21 and the second filter element 22 form a second water inlet channel 24. The second filter element 22 and the outer wall of the first filter bottle 11 form a wastewater channel 27. The central tube 23 is disposed in the middle of the first filter element 12. The interior of the central tube 23 forms a second water outlet channel 25. The second water outlet end of the first water outlet channel 14 is connected to the second water inlet channel 24. The first filtered fluid is filtered by the second filter element 22 to obtain the second filtered fluid. The second water inlet channel 24 is used to output the second filtered fluid.

[0033] In the above structure, a multi-stage filtration function is formed by setting the first filter component 1 and the second filter component 2 in the filter element. The raw water can be selectively filtered through some or all of the filter components. Different degrees of filtration of the fluid can be achieved through a single filter element according to the purpose of use. At the same time, it can also avoid the mixing between filtered fluids of different filtration levels, so as to achieve the purpose of outputting fluids of different filtration levels according to the water quality requirements. Specifically, raw water enters the first filter assembly 1 through the first inlet channel 13 for filtration. After filtration by the first filter element 12, it forms the first filtered fluid. This first filtered fluid can be directly output from the first outlet end of the first outlet channel 14. This first filtered fluid is suitable for applications with low water quality requirements. Alternatively, if higher water quality is required, a connector can be used to connect the second outlet end of the first outlet channel to the second inlet channel, allowing the first filtered fluid to continue to be input from the second outlet end of the first outlet channel 14 to the second filter assembly 2 for filtration. The first filtered fluid enters the first inlet channel 13 and undergoes further filtration by the second filter element 22 to form the second filtered fluid. The second filtered fluid is output through the second outlet channel 25, suitable for applications with higher water quality requirements. This filter element can select one or two filter assemblies for filtration according to different water quality needs, thereby outputting fluids with different levels of filtration. This helps optimize resource use, reduce unnecessary filtration steps, and meet water quality requirements in different scenarios.

[0034] In one embodiment, the first outlet end of the first water outlet channel 14 can be directly connected to an external water-using device, and the first filtered fluid is output to the external water-using device for direct use through the first outlet end of the first water outlet channel 14. Additionally, a second valve body can be provided at the first outlet end of the first water outlet channel 14, which can be used to control the opening or closing of the first outlet end of the first water outlet channel 14. If the connecting component is a connecting pipe, a connector, or a first valve body, the second outlet end of the first water outlet channel 14 can be connected to the second inlet end through a connecting pipe, a connector, or a first valve body. If the connecting component is a connecting pipe or a connector, the second outlet end of the first water outlet channel 14 can be directly connected to the second inlet channel 24, and the second filtered fluid is output to the external water-using device for use after filtration. Furthermore, a third valve body can be provided at the second outlet end of the first water outlet channel 14, which can be used to control the opening or closing of the second outlet end of the first water outlet channel 14.

[0035] In addition, if the connector adopts a fourth valve body, the fourth valve body can be connected to the water-using equipment, the second water outlet end and the second water outlet end of the first water outlet channel 14 respectively, and the opening or closing of the first water outlet end and the second water outlet end can be directly controlled through the fourth valve body; when the first water outlet end is open and the second water outlet end is closed, the purpose of outputting the first filtered water body to the water-using equipment is achieved; when the first water outlet end is closed and the second water outlet end is open, the purpose of outputting the second filtered water body to the water-using equipment is achieved.

[0036] In one embodiment, the first filter bottle 11 has a first cavity 111 and a second cavity 112 inside, and the first filter element 12 is disposed in the first cavity 111; the second filter assembly 2 also includes a third filter element 26, which is disposed in the second cavity 112. A first water passage 261 is formed in the middle of the third filter element 26, and the first water passage 261 is connected to the second water outlet 25; the second cavity 112 is connected to the second water inlet 24, and the second filtered fluid flows to the second cavity 112.

[0037] In the above structure, by adding a third filter element 26 to improve the filtration effect, impurities in the water can be removed more effectively, and the water quality of the second filtered fluid can be improved. In addition, the formation of a first cavity 111 and a second cavity 112 in the first filter bottle 11 allows the first filtered fluid and the second filtered fluid to flow separately physically, avoiding the mixing of fluids from different filtration stages. Specifically, the raw water first flows into the first inlet channel 13 and undergoes preliminary filtration through the first filter element 12 to form the first filtered fluid. The first filtered fluid enters the second filter assembly 2 through the second inlet channel 24, and after being filtered by the second filter element 22, it can continue to flow into the second cavity 112, where the third filter element 26 further filters the fluid, ultimately forming the second filtered fluid. The second filtered fluid passes through the first water passage 261 in the middle of the third filter element 26 and finally flows out through the second outlet channel 25.

[0038] In one embodiment, the central tube 23 includes a water guide pipe 231 and an installation cylinder 232. The water guide pipe 231 is provided with a second water outlet channel 25. The connection between the installation cylinder 232 and the water guide pipe 231 is provided with an abutting protrusion 233. The abutting protrusion 233 is sealed to the inner wall of the first filter bottle 11, so that the interior of the first filter bottle 11 is divided into a first cavity 111 and a second cavity 112. The third filter element 26 is disposed in the installation cylinder 232. The installation cylinder 232 is connected to the second cavity 112, and the second cavity 112 is connected to the second water inlet channel 24.

[0039] In the above structure, the central tube 23 includes a water guide pipe 231 and a mounting cylinder 232. The water guide pipe 231 has a second water outlet channel 25, which guides the fluid filtered through the second filter to flow out to the outside of the filter element. The mounting cylinder 232 is used to install the third filter element 26, so as to achieve further filtration of the fluid in the second cavity 112. In addition, the sealing connection between the abutting protrusion 233 and the inner wall of the first filter bottle 11 ensures that the interior of the first filter bottle 11 can be effectively divided into the first cavity 111 and the second cavity 112, preventing the fluids in the first cavity 111 and the second cavity 112 from mixing.

[0040] In one embodiment, the side wall of the mounting cylinder 232 is provided with a plurality of first through holes 2321, and the interior of the mounting cylinder 232 is connected to the second cavity 112 through the first through holes 2321; the side wall of the second cavity 112 is provided with a second through hole, and the second cavity 112 is connected to the second water inlet channel 24 through the second through hole.

[0041] In the above structure, the first through hole 2321 on the mounting cylinder 232 and the second through hole on the second cavity 112 allow fluid to flow smoothly between the mounting cylinder 232, the second cavity 112, and the first water inlet channel 13, ensuring the continuity of fluid flow within the filter element. Specifically, the first filtered fluid in the second water inlet channel 24, after being filtered by the second filter element 22, flows into the second cavity 112 through the first through hole 2321 of the mounting cylinder 232. Within the second cavity 112, the third filter element 26 further filters the fluid to form the second filtered fluid. The second filtered fluid can flow into the second water inlet channel 24 through the second through hole of the second cavity 112 and is finally output from the second water outlet channel 25.

[0042] In one embodiment, the diameter of the mounting cylinder 232 is larger than the diameter of the water guide pipe 231, and the first filter element 12 is sleeved on the outer surface of the water guide pipe 231. One end of the first filter element 12 abuts against the end of the mounting cylinder 232 that is connected to the water guide pipe 231.

[0043] In the above structure, the diameter of the mounting cylinder 232 is larger than the diameter of the water guide pipe 231, so that there is enough space between the outer wall of the water guide pipe 231 and the inner wall of the second filter element 22 to accommodate the first filter element 12; at the same time, the mounting cylinder 232 can provide support for the first filter element 12; secondly, there is also enough space inside the mounting cylinder 232 to place the third filter element 26, so as to make reasonable use of space and optimize the layout of the first filter element 12 and the second filter element 22.

[0044] In one embodiment, the water guide pipe 231 and the mounting cylinder 232 are an integral structure.

[0045] In the above structure, the water pipe 231 and the mounting cylinder 232 are integrated into one structure, which can improve the connection stability between the water pipe 231 and the mounting cylinder 232, and also reduce the number of parts in the manufacturing process and simplify the production process.

[0046] In one embodiment, the second filter bottle 21 is provided with a first water inlet, a first water outlet, a second water inlet, a second water outlet and a wastewater outlet. The first water inlet is connected to the first water inlet channel 13, the first water outlet is connected to the first water outlet channel 14, the second water inlet is connected to the second water inlet channel 24, the second water outlet is connected to the second water outlet channel 25, and the wastewater outlet is connected to the wastewater channel 27.

[0047] In the above structure, by setting independent first inlet, first outlet, second inlet, second outlet, and wastewater outlet, the fluid channels for different filtration stages can be clearly distinguished, ensuring that the fluid flows along a predetermined path. Specifically, the first inlet is connected to the first inlet channel 13, through which raw water enters for preliminary filtration. The first outlet is connected to the first outlet channel 14, through which the first filtered fluid flows out, ready for direct use or into the next filtration stage. The second inlet is connected to the second inlet channel 24, through which the first filtered fluid flows for secondary filtration. The second outlet is connected to the second outlet channel 25, through which the second filtered fluid flows out, and is used in scenarios with higher water quality requirements. Additionally, the wastewater generated after the first filtered fluid passes through the second filter element 22 is discharged from the wastewater outlet.

[0048] In one embodiment, the filter element further includes a connector, which includes a first valve body. The first port of the first valve body is connected to a first outlet, a second outlet, a third port, a fourth port, and a fifth port. The first port is connected to the second outlet. The first port is connected to the third port, the second port to the fourth port, and the fifth port to the third port. When the first filtered fluid needs to be output, the first and third ports of the first valve body are opened, and the first filtered fluid output from the first outlet is output to the water-using device. When the second fluid needs to be output, the second and fourth ports of the first valve body are opened, and the first filtered fluid output from the first outlet is output from the second outlet and input into the second inlet channel 24 for filtration through the second inlet. Then, the fifth and third ports of the first valve body are opened, and the resulting second filtered fluid is output to the water-using device.

[0049] In one embodiment, the second filter bottle 21 includes a bottle body 211 and an end cap 212. The bottle body 211 has a third cavity with an opening. The end cap 212 is connected to the end of the bottle body 211 with the opening. The first filter assembly 1 is disposed in the third cavity, and the first water inlet, the first water outlet, the second water inlet and the second water outlet are disposed on the end cap 212.

[0050] In the above structure, the bottle body 211 and the end cap 212 form a closed container that can be used to accommodate the second filter element 22 and the second filter assembly 2, which is convenient for installation. The first water inlet, the first water outlet, the second water inlet, and the second water outlet are integrated on the end cap 212, which is convenient for connecting pipes and operation. It should be noted that the bottle body 211 and the end cap 212 are connected by a spin welding process, which can improve the connection stability of the bottle body 211 and the end cap 212, and at the same time facilitate the installation of the first filter assembly 1 and the second filter element 22 into the third cavity.

[0051] In one embodiment, the second filter element 22 includes a reverse osmosis membrane 221 and a first filter element 12 cover. The first filter element 12 cover is connected to one end of the reverse osmosis membrane 221. The inner wall of the end cover 212 has a first extension section 2121 extending toward the first filter element 12 cover. The first filter element 12 cover is sealed to the first extension section 2121. A second water passage 2124 is formed between the first extension section 2121 and the inner wall of the end cover 212. The second water passage 2124 is connected to the second water inlet channel 24 and the second water inlet, respectively.

[0052] In the above structure, the reverse osmosis membrane 221 effectively removes dissolved salts, organic matter, bacteria, etc. from the water, improving water quality. Furthermore, the sealed connection between the first filter element 12 cover and the first extension 2121 on the inner wall of the end cover 212 ensures the sealing of the second water passage 2124 and the overall sealing of the filter element. Specifically, the space between the first extension 2121 and the first filter element 12 cover forms the second water passage 2124, providing a flow path for the fluid. The first filtered fluid enters the second water passage 2124 through the second inlet and then flows to the reverse osmosis membrane 221 for filtration. The filtered water (the second filtered fluid) can flow out through the second outlet 25, and the wastewater produced after filtration can flow out through the wastewater passage 27, ultimately being discharged from the wastewater outlet.

[0053] In one embodiment, the first filter element 12 includes a filter medium layer 121 and a second filter element 22 cover 122. The second filter element 22 cover 122 is connected to one end of the filter medium layer 121. The inner wall of the end cap 212 has a second extension section 2122 extending toward the second filter element 22 cover 122. The second filter element 22 cover 122 is sealed to the second extension section 2122. A third water passage 2125 is formed between the second extension section 2122 and the first extension section 2121. The second water passage 2125 is connected to the first water inlet channel 13 and the first water inlet, respectively.

[0054] The filter media layer 121 is used to remove large particles such as silt and rust from the water, achieving preliminary filtration of the raw water. Additionally, adding the filter media layer 121 reduces the workload on the second filter element 22 and the third filter element 26, extending their service life. The cover 122 of the second filter element 22 is connected to one end of the filter media layer 121, serving a fixing and sealing function. The inner wall of the end cover 212 has a second extension section 2122 extending towards the cover 122 of the second filter element 22. The second extension section 2122 cooperates with the cover 122 of the second filter element 22 to form a sealed connection, preventing interference with the internal water flow and reducing the use of additional connectors and materials, thus lowering manufacturing costs. Specifically, after passing through the first inlet, the raw water flows through the third water passage 2125 into the first inlet channel 13. It should be noted that the second extension section 2122 and the cover 122 of the second filter element 22 can be sealed by adhesive bonding or by a sealing ring.

[0055] In one embodiment, the inner wall of the end cap 212 has a third extension section 2123 extending toward the central tube 23, and the end of the central tube 23 is sealed to the third extension section 2123; a fourth water passage 2126 is formed between the third extension section 2123 and the second extension section 2122, and the fourth water passage 2126 is connected to the first water outlet 14 and the first water outlet; a fifth water passage 2127 is formed in the middle of the third extension section 2123, and the fifth water passage 2127 is connected to the second water outlet 25 and the second water outlet respectively.

[0056] In the above structure, the inner wall of the end cap 212 is provided with a third extension section 2123 extending toward the central tube 23. The third extension section 2123 is used to form a sealed connection with the central tube 23, which enhances the structural stability of the filtration system, prevents water leakage, and ensures the long-term stable operation of the filter element. When the water passes through different filter elements, it passes through multiple water passages to prevent internal water flow from affecting the filtration effect. Specifically, the first filtered fluid formed after filtration by the first filter element 12 flows sequentially through the first water outlet channel 14 and the fourth water passage channel 2126 and is output from the first water outlet; the second filtered fluid after filtration by the second filter flows sequentially through the second water outlet channel 25 and the fifth water passage channel 2127 and is output from the second water outlet. It should be noted that the third extension section 2123 and the end of the central tube 23 can be sealed by adhesive bonding or by sealing ring.

[0057] In one embodiment, the first filter element 1 is a pre-filter element, which can effectively remove large particulate impurities in the water, such as silt, rust, and insect eggs. The first filter element 12 can be made of PP cotton or stainless steel filter screen. The second filter element 22 and the third filter element 26 act as post-filters. The first filter element 12 can be made of reverse osmosis membrane, and the second filter element 22 can remove dissolved salts, organic matter, bacteria, etc. from the water. The third filter element 26 can be made of carbon fiber filter cartridge, which can be made of activated carbon or carbon fiber material. The third filter element 26 can further remove residual chlorine and odors from the water, thereby further improving water quality.

[0058] The technical solution of this application forms a multi-stage filtration function by setting a first filter component 1 and a second filter component 2 in the filter element. It can selectively filter the raw water through some or all of the filter components. Different degrees of filtration of the fluid can be achieved through a single filter element according to the purpose of use. At the same time, it can also avoid the mixing between filtered fluids of different filtration levels, so as to achieve the purpose of outputting fluids of different filtration levels according to the water quality requirements. Specifically, raw water enters the first filter assembly 1 through the first inlet channel 13 for filtration. After filtration by the first filter element 12, it forms the first filtered fluid. This first filtered fluid can be directly output from the first outlet end of the first outlet channel 14. This first filtered fluid is suitable for applications with low water quality requirements. Alternatively, if higher water quality is required, a connector can be used to connect the second outlet end of the first outlet channel to the second inlet channel, allowing the first filtered fluid to continue to be input from the second outlet end of the first outlet channel 14 to the second filter assembly 2 for filtration. The first filtered fluid enters the first inlet channel 13 and undergoes further filtration by the second filter element 22 to form the second filtered fluid. The second filtered fluid is output through the second outlet channel 25, suitable for applications with higher water quality requirements. This filter element can select one or two filter assemblies for filtration according to different water quality needs, thereby outputting fluids with different levels of filtration. This helps optimize resource use, reduce unnecessary filtration steps, and meet water quality requirements in different scenarios.

[0059] This application also proposes a water purification device, which includes a filter element. The specific structure of the filter element 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.

[0060] The above are merely exemplary embodiments of this application and do not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A filter element, characterized in that, include: The first filtration assembly includes a first filter bottle and a first filter element. The first filter element is disposed inside the first filter bottle. A first water inlet channel is formed between the first filter element and the inner wall of the first filter bottle. A first water outlet channel is formed on the side of the first filter element away from the water inlet channel. Raw water is filtered by the first filter element to obtain a first filtered fluid. The first outlet end of the first water outlet channel is used to output the first filtered fluid; The second filtration assembly includes a second filter bottle, a second filter element, and a central tube. The first filtration assembly is disposed inside the second filter bottle. A second water inlet channel is formed between the inner wall of the second filter bottle and the second filter element. A wastewater channel is formed between the second filter element and the outer wall of the first filter bottle. The central tube is disposed in the middle of the first filter element. A second water outlet channel is formed inside the central tube. The second outlet end of the first water outlet channel is used to connect with the second water inlet channel through a connector; the first filtered fluid is filtered by the second filter element to obtain the second filtered fluid, and the second water inlet channel is used to output the second filtered fluid.

2. The filter element as described in claim 1, characterized in that, The first filter bottle has a first cavity and a second cavity inside, and the first filter element is disposed in the first cavity; the second filter assembly also includes a third filter element, which is disposed in the second cavity, and a first water passage is formed in the middle of the third filter element, which is connected to the second water outlet passage; the second cavity is connected to the second water inlet passage, and the second filtered fluid flows to the second cavity.

3. The filter element as described in claim 2, characterized in that, The central tube includes a water guide pipe and an installation cylinder. The water guide pipe is provided with a second water outlet channel. The connection between the installation cylinder and the water guide pipe is provided with an abutting protrusion. The abutting protrusion is sealed to the inner wall of the first filter bottle, so that the interior of the first filter bottle is divided into a first cavity and a second cavity. The third filter element is disposed in the installation cylinder. The installation cylinder is connected to the second cavity, and the second cavity is connected to the second water inlet channel.

4. The filter element as described in claim 3, characterized in that, The mounting cylinder has several first through holes on its side wall, and the interior of the mounting cylinder communicates with the second cavity through the first through holes; the second cavity has second through holes on its side wall, and the second cavity communicates with the second water inlet channel through the second through holes; and / or, The diameter of the mounting cylinder is larger than the diameter of the water guide pipe. The first filter element is sleeved on the outer surface of the water guide pipe, and one end of the first filter element abuts against the end of the mounting cylinder that connects to the water guide pipe; and / or, The water guide pipe and the mounting cylinder are an integral structure.

5. The filter element according to any one of claims 1 to 4, characterized in that, The second filter bottle is provided with a first water inlet, a first water outlet, a second water inlet, a second water outlet and a wastewater outlet. The first water inlet is connected to the first water inlet channel, and the first water outlet is connected to the first water outlet channel. The second water inlet is connected to the second water inlet channel, the second water outlet is connected to the second water outlet channel, and the wastewater outlet is connected to the wastewater channel.

6. The filter element as described in claim 5, characterized in that, The second filter bottle includes a bottle body and an end cap. The bottle body has a third cavity with an opening. The end cap is connected to the end of the bottle body with the opening. The first filter assembly is disposed within the third cavity. The first inlet, the first outlet, the second inlet, and the second outlet are located on the end cap; and / or, The filter element also includes a connector, which includes a first valve body. The first interface of the first valve body is connected to the first water outlet, the first interface of the first valve body is connected to the second water outlet, the third interface of the first valve body is connected to the first water outlet, the fourth interface of the first valve body is connected to the second water inlet, and the fifth interface of the first valve body is connected to the second water outlet. The first interface is connected to the third interface, the second interface of the first valve body is connected to the fourth interface, and the fifth interface is connected to the third interface.

7. The filter element as described in claim 6, characterized in that, The second filter element includes a reverse osmosis membrane and a first filter element cover. The first filter element cover is connected to one end of the reverse osmosis membrane. The inner wall of the end cover has a first extension section extending toward the first filter element cover. The first filter element cover is sealed to the first extension section. A second water passage is formed between the first extension section and the inner wall of the end cover. The second water passage is connected to the second water inlet channel and the second water inlet, respectively.

8. The filter element as described in claim 7, characterized in that, The first filter element includes a filter media layer and a second filter element cover. The second filter element cover is connected to one end of the filter media layer. The inner wall of the end cover has a second extension section extending toward the second filter element cover. The second filter element cover is sealed to the second extension section. A third water passage is formed between the second extension section and the first extension section. The third water passage is connected to the first water inlet channel and the first water inlet, respectively.

9. The filter element as described in claim 8, characterized in that, The inner wall of the end cap has a third extension section extending toward the central tube, and the end of the central tube is sealed to the third extension section; a fourth water passage is formed between the third extension section and the second extension section, and the fourth water passage is connected to the first water outlet and the first water outlet; a fifth water passage is formed in the middle of the third extension section, and the fifth water passage is connected to the second water outlet and the second water outlet respectively.

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

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