Filter element structure and water purifier

Abstract

The utility model belongs to the technical field of water purification equipment, and discloses a filter element structure and a water purifier. The filter element structure comprises a filter bottle, a central pipe assembly and a filter assembly, the primary filter unit is used for purifying raw water and adjusting the TDS value to form purified water, and the purified water flows into the secondary filter unit, so that the purified water is separated to form water with a low calcium-magnesium ratio and water with a high calcium-magnesium ratio. According to the filter element structure, the first-stage filter unit and the second-stage filter unit are integrated in the same filter bottle and are arranged at intervals in the axial direction of the central pipe assembly, and an integrated composite design is used for replacing a multi-stage split design, so that the integration level of the filter element structure is improved, and the size of the filter element structure is reduced; according to the filter element structure, the primary filter unit is used for purifying raw water and adjusting the TDS value, the secondary filter unit is used for separating at least part of purified water generated by the primary filter unit to form water with the high calcium-magnesium ratio and water with the low calcium-magnesium ratio, and the obtaining mode of the water with the low calcium-magnesium ratio is safe and reliable.

Description

Technical Field

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

[0002] Magnesium ions play a vital role in the human body, primarily by participating in catalytic enzyme reactions, enhancing muscle energy, promoting calcium absorption, regulating the nervous system, and protecting the cardiovascular system. Regarding magnesium's role in promoting the absorption of other ions, magnesium deficiency can lead to potassium and calcium loss. Insufficient magnesium intake can easily cause hypomagnesemia, resulting in hypokalemia and hypocalcemia, while hypermagnesemia is very rare. Current water purifier filter structures have a high magnesium ion retention rate but a low calcium ion retention rate, resulting in a high calcium-to-magnesium ratio in the final water. Therefore, long-term consumption of water from water purifiers can easily lead to insufficient magnesium ion absorption. Current technologies generally introduce minerals into the water purification system artificially to increase magnesium ion content and thus lower the calcium-to-magnesium ratio. However, this method of lowering the calcium-to-magnesium ratio poses certain risks to hygiene and safety. Utility Model Content

[0003] The purpose of this utility model is to provide a filter element structure and a water purifier. This filter element structure not only has a high degree of integration, but also can produce purified water with a low calcium-magnesium ratio according to user needs, and the method of reducing the calcium-magnesium ratio is safe and reliable.

[0004] To achieve this objective, the present invention adopts the following technical solution:

[0005] A filter element structure includes: a filter bottle with an inlet; a central tube assembly disposed within the filter bottle, the central tube assembly forming a first outlet channel and a second outlet channel; and a filter assembly disposed within the filter bottle and sleeved outside the central tube assembly, the filter assembly including a primary filter unit and a secondary filter unit spaced apart axially on the central tube assembly, the inlet communicating with the inlet end of the primary filter unit, and a first water passage forming between the other end of the first outlet channel and the secondary filter unit. A second water passage is formed between the primary filtration unit and the first water outlet channel, and a third water outlet channel is formed between the filtration assembly and the filter bottle; wherein, the primary filtration unit is used to purify the raw water and adjust the TDS value of the raw water to form purified water; the secondary filtration unit is used to separate at least part of the purified water to form low calcium-magnesium ratio water and high calcium-magnesium ratio water, wherein the calcium-magnesium content ratio in the low calcium-magnesium ratio water is less than the calcium-magnesium content ratio in the high calcium-magnesium ratio water, the high calcium-magnesium ratio water flows to the second water outlet channel, and the low calcium-magnesium ratio water flows to the third water outlet channel.

[0006] Preferably, the filter bottle is provided with a first outlet, a second outlet, and a third outlet, one end of the first outlet channel is connected to the first outlet, the second outlet channel is connected to the second outlet, and the third outlet channel is connected to the third outlet; and / or, the primary filtration unit includes an RO membrane or a desalination nanofiltration membrane; and / or, the secondary filtration unit includes a salt separation nanofiltration membrane; and / or, the secondary filtration unit has a desalination rate of magnesium sulfate greater than or equal to 85%; and / or, the secondary filtration unit has a desalination rate of sodium chloride less than 50%; and / or, the secondary filtration unit has a desalination rate of calcium chloride less than 50%; and / or, the filtration assembly further includes a tertiary filtration unit, which is used to reduce the TDS value of the low calcium-magnesium ratio water, and the tertiary filtration unit is a desalination nanofiltration membrane or an RO membrane.

[0007] Preferably, the central tube assembly includes a first central tube and a second central tube, the first central tube being sleeved outside the second central tube, a first water outlet channel being formed between the second central tube and the first central tube, and a second water outlet channel being formed inside the second central tube; the second central tube includes a first tube portion located inside the first central tube and a second tube portion protruding outside the first central tube, the primary filtration unit being sleeved outside the first central tube, and the secondary filtration unit being sleeved outside the second tube portion.

[0008] Preferably, the central tube assembly includes a first central tube, a second central tube, and a third central tube. The first central tube is sleeved outside the second central tube, and a first water outlet channel is formed between the second central tube and the first central tube. The third central tube is coaxially connected to the second central tube, and the second water outlet channel is formed together inside the second central tube and the third central tube. The primary filtration unit is sleeved outside the first central tube, and the secondary filtration unit is sleeved outside the third central tube.

[0009] Preferably, the filter element structure further includes a separator, which includes a separator plate, a first insertion pipe and a second insertion pipe protruding from one side of the separator plate, and a third insertion pipe protruding from the other side of the separator plate. The first insertion pipe is sleeved over the second insertion pipe and is inserted into the first central tube. The second insertion pipe is inserted into the second central tube, and the third insertion pipe is inserted into the third central tube. The first water passage includes a first flow hole disposed on the separator plate and located between the first insertion pipe and the second insertion pipe.

[0010] Preferably, the filter element structure further includes a separator, which is disposed between the primary filtration unit and the secondary filtration unit and is used to support the primary filtration unit and the secondary filtration unit. The first water passage includes at least one first flow hole disposed on the separator.

[0011] Preferably, the separator includes a separator plate, a first annular plate, and a second annular plate. The first annular plate protrudes to one side along the circumference of the separator plate to form a first mounting cavity, and the second annular plate protrudes to the other side along the circumference of the separator plate to form a second mounting cavity. The first flow hole is disposed on the separator plate and is positioned directly opposite the first water outlet channel. The water outlet end of the primary filter unit is inserted into the first mounting cavity, and the water inlet end of the secondary filter unit is inserted into the second mounting cavity.

[0012] Preferably, the filter element structure further includes a support member disposed inside the filter bottle. The support member includes a support ring plate and a third annular plate. The third annular plate is arranged circumferentially along the support ring plate and protrudes to one side of the support ring plate. The support ring plate and the third annular plate together form a third mounting cavity, and the water inlet end of the primary filtration unit is inserted into the third mounting cavity.

[0013] Preferably, the filter element structure further includes a support member, the support member including a fourth annular plate, the filter bottle body including a first annular portion, one of the first annular portion and the fourth annular plate forming a first insertion groove, and the other forming a first insertion portion, the first insertion portion and the first insertion groove being inserted into each other; and / or, the filter bottle body including a second annular portion, one of the second annular portion and the first central tube forming a second insertion groove, and the other forming a second insertion portion, the second insertion portion and the second insertion groove being inserted into each other; and / or, the filter bottle body including a third annular portion, one of the third annular portion and the second central tube forming a third insertion groove, and the other forming a third insertion portion, the third insertion portion and the third insertion groove being inserted into each other.

[0014] A water purifier includes a housing and the aforementioned filter element structure, wherein the filter element structure is disposed within the housing.

[0015] The beneficial effects of this utility model are:

[0016] The filter element structure provided by this utility model includes a filter bottle, a central tube assembly, and a filter assembly. This filter element structure integrates a primary filtration unit and a secondary filtration unit into the same filter bottle and sets them at intervals along the axial direction of the central tube assembly. It uses an integrated composite design to replace the multi-stage split design, which improves the integration of the filter element structure and reduces its volume. The primary filtration unit of this filter element structure purifies the raw water and adjusts the TDS value. The secondary filtration unit separates at least part of the purified water produced by the primary filtration unit to form high calcium-magnesium ratio water and low calcium-magnesium ratio water. The method of obtaining low calcium-magnesium ratio water is safe and reliable. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the filter element structure of this utility model;

[0018] Figure 2 This is a bottom view of the filter element structure of this utility model;

[0019] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0020] Figure 4 yes Figure 2 Cross-sectional view along the BB direction;

[0021] Figure 5 This is a top view of the bottle body containing the filter element structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the separator component of the filter element structure of this utility model;

[0023] Figure 7 This is a schematic diagram of the separator of the filter element structure of this utility model from another perspective;

[0024] Figure 8 This is an assembly drawing of the separator and central tube assembly of the filter element structure of this utility model;

[0025] Figure 9 This is an assembly diagram of the separator and central tube assembly of the filter element structure of this utility model from another perspective;

[0026] Figure 10 This is a schematic diagram of the support component of the filter element structure of this utility model;

[0027] Figure 11 This is a cross-sectional view of the bottle body of the filter element structure of this utility model.

[0028] In the picture:

[0029] 10. Filter element structure;

[0030] 100. Filter bottle; 101. Inlet; 102. First outlet; 103. Second outlet; 104. Third outlet; 110. Bottle body; 111. First annular portion; 112. Second annular portion; 113. Third annular portion; 120. Cover; 130. Fourth seal; 140. Fifth seal; 150. Sixth seal;

[0031] 200, Central tube assembly; 201, First outlet channel; 202, Second outlet channel; 203, Third outlet channel; 210, First central tube; 211, Second flow hole; 220, Second central tube; 230, Third central tube; 231, Third flow hole;

[0032] 300. Filter assembly; 310. Primary filter unit; 320. Secondary filter unit;

[0033] 400, Separator; 401, First flow hole; 402, First mounting cavity; 403, Second mounting cavity; 410, Separator plate; 420, First annular plate; 430, Second annular plate; 440, First insertion pipe; 450, Second insertion pipe; 460, Third insertion pipe; 470, First seal; 480, Second seal; 490, Third seal;

[0034] 500, Support component; 510, Support ring plate; 520, Third ring plate; 530, Fourth ring plate. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0036] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0039] like Figures 1 to 5 As shown, this utility model discloses a filter element structure 10, which is used in a water purifier to purify raw water into purified water that meets user needs. Specifically, the filter element structure 10 includes a filter bottle 100, a central tube assembly 200, and a filter assembly 300. The filter bottle 100 is provided with a water inlet 101 for supplying raw water. The central tube assembly 200 is disposed inside the filter bottle 100, and a first water outlet channel 201 and a second water outlet channel 202 are formed inside the central tube assembly 200. The filter assembly 300 is disposed inside the filter bottle 100 and sleeved outside the central tube assembly 200. The filter assembly 300 includes a primary filter unit 310 and a secondary filter unit 320. The primary filter unit 310 and the secondary filter unit 320 are arranged axially and spaced apart from each other in the central tube assembly 200, i.e., arranged vertically. The inlet 101 is connected to the inlet end of the primary filter unit 310. A second water passage is formed between the primary filter unit 310 and the first water outlet channel 201. A first water passage is formed between the other end of the first water outlet channel 201 and the secondary filter unit 320. A third water outlet channel 203 is formed between the filter assembly 300 and the filter bottle 100. The primary filtration unit 310 is used to purify the raw water and adjust the TDS value of the raw water to form purified water. The TDS value is also known as total dissolved solids. The secondary filtration unit 320 is used to separate at least part of the purified water to form low calcium-magnesium ratio water and high calcium-magnesium ratio water. The calcium-magnesium content ratio in the low calcium-magnesium ratio water is less than that in the high calcium-magnesium ratio water. The low calcium-magnesium ratio water flows to the second outlet channel 202, and the high calcium-magnesium ratio water flows to the third outlet channel 203.

[0040] In some embodiments, the filter bottle 100 is further provided with a first outlet 102, a second outlet 103, and a third outlet 104. The first outlet 102, second outlet 103, and third outlet 104 are used for water discharge. One end of the first outlet channel 201 is connected to the first outlet 102, the second outlet channel 202 is connected to the second outlet 103, and the third outlet channel 203 is connected to the third outlet 104. The water flowing out of the filter element structure 10 through different outlets has different water quality. This arrangement allows the purified water entering the first outlet channel 201 to be directly discharged through the first outlet 102, or it can flow upwards to the secondary filtration unit 320 for further treatment. In some parallel embodiments, the filter bottle 100 is only provided with a second outlet 103 and a third outlet 104. The purified water entering the first outlet channel 201 cannot be directly discharged outside the filter element structure 10, but can only flow upwards to the secondary filtration unit 320.

[0041] When the filter bottle 100 is equipped with three outlets—a first outlet 102, a second outlet 103, and a third outlet 104—the detailed process of the filter element structure 10 purifying raw water is as follows: Raw water enters the filter bottle 100 through the inlet 101 and directly enters the primary filtration unit 310 for filtration. The primary filtration unit 310 purifies the raw water and adjusts the TDS value, specifically reducing the TDS to the target range. The purified raw water, under pressure, flows through the second water passage into the first outlet passage 201. Figure 3 As shown, the purified water entering the first water outlet channel 201 can flow downwards according to the user's needs, and then be discharged directly through the first water outlet 102 for the user to drink, or as... Figure 4 As shown, the purified water entering the first outlet channel 201 flows upward and through the first water passage into the secondary filtration unit 320. The secondary filtration unit 320 has the ability to separate magnesium ions from calcium and sodium ions. Thus, the purified water entering the secondary filtration unit 320 can be separated into high calcium-magnesium ratio water and low calcium-magnesium ratio water under the action of the secondary filtration unit 320. The high calcium-magnesium ratio water flows to the second outlet channel 202 and is finally discharged from the filter element structure 10 from the second outlet 103. The low calcium-magnesium ratio water flows to the third outlet channel 203 and is finally discharged from the filter element structure 10 from the third outlet 104. It should be noted that the ratio of calcium ion content to magnesium ion content (referred to as calcium-magnesium ratio) in the two streams of purified water entering the secondary filtration unit 320 is different. The stream with a high calcium-magnesium ratio is defined as high calcium-magnesium ratio water, and the stream with a low calcium-magnesium ratio is defined as low calcium-magnesium ratio water. The specific values ​​of the calcium-magnesium ratio in the high calcium-magnesium ratio water and the low calcium-magnesium ratio water are not specifically limited.

[0042] Compared to the multi-stage, separate filter cartridge structures used in existing technologies, the filter cartridge structure 10 provided by this utility model adopts an integrated composite design, integrating the primary filtration unit 310 and the secondary filtration unit 320 within the same filter bottle 100. The primary filtration unit 310 and the secondary filtration unit 320 are spaced apart on the central tube assembly 200, improving the integration of the filter cartridge structure 10, reducing its volume, and simplifying the internal flow channels. Furthermore, the primary filtration unit 310 of this filter cartridge structure 10 purifies the raw water and adjusts the TDS value, while the secondary filtration unit 320 separates magnesium ions from calcium and sodium ions, thus forming low-calcium-magnesium ratio water rich in magnesium ions and high-calcium-magnesium ratio water rich in calcium and sodium ions. Drinking water with a low calcium-magnesium ratio can effectively prevent hypomagnesemia, while drinking water with a high magnesium ion content can promote calcium ion absorption, thereby preventing hypocalcemia. Long-term consumption is beneficial for improving the user's physical condition. As for the water with a high calcium-to-magnesium ratio, it can be returned to the inlet 101 for reuse, or used in other situations where needed. In addition, compared to artificially adding minerals, directly using the minerals in the raw water to obtain a water flow with a low calcium-to-magnesium ratio is safer and more reliable.

[0043] Continue to refer to Figure 1 and Figure 5 As shown, the filter bottle 100 includes a detachably connected bottle body 110 and a cap 120. One end of the bottle body 110 is provided with an inlet 101, a first outlet 102, a second outlet 103, and a third outlet 104. The other end of the bottle body 110 forms a mounting opening, and the cap 120 is detachably mounted at the mounting opening. Removing the cap 120 opens the mounting opening, allowing the central tube assembly 200 and the filter assembly 300 to be installed inside the bottle body 110 through the mounting opening.

[0044] The central tube assembly 200 is used to install the filter assembly 300, form the outlet water channel, and deliver purified water to the secondary filtration unit 320. (Continue to refer to...) Figure 4As shown, in some embodiments, the central tube assembly 200 includes three central tubes. Specifically, the central tube assembly 200 includes a first central tube 210, a second central tube 220, and a third central tube 230. The first central tube 210 is sleeved outside the second central tube 220, and the lengths of the first and second central tubes 210 are approximately the same. The third central tube 230 is coaxially arranged with the second central tube 220. A first water outlet channel 201 is formed between the second central tube 220 and the first central tube 210. The third central tube 230 is coaxially connected to the second central tube 220, so that a second water outlet channel 202 can be formed together inside the second central tube 220 and the third central tube 230. A primary filtration unit 310 is sleeved outside the first central tube 210, and a secondary filtration unit 320 is sleeved outside the third central tube 230. This arrangement makes it easier to repair and replace the central tube assembly 200 in case of failure, such as blockage or damage.

[0045] In some parallel embodiments, the central tube assembly 200 may consist of two central tubes. Specifically, the central tube assembly 200 includes a first central tube 210 and a second central tube 220. The first central tube 210 is sleeved outside the second central tube 220, forming a first water outlet channel 201 between the second central tube 220 and the first central tube 210, and a second water outlet channel 202 is formed inside the second central tube 220. The second central tube 220 includes a first tube portion located inside the first central tube 210 and a second tube portion protruding outside the first central tube 210. A primary filtration unit 310 is sleeved outside the first central tube 210, and a secondary filtration unit 320 is sleeved outside the second tube portion. This arrangement helps reduce the number of central tubes used, thereby reducing the difficulty of sealing.

[0046] To support and separate the primary filtration unit 310 and the secondary filtration unit 320, so that the separated water of different qualities does not easily mix, such as Figure 3 , Figure 6 and Figure 7 As shown, the filter element structure 10 also includes a separator 400, which is disposed between the primary filtration unit 310 and the secondary filtration unit 320. The separator 400 is used to stably support the primary filtration unit 310 and the secondary filtration unit 320. The first water passage includes at least one first flow hole 401 disposed on the separator 400.

[0047] Specifically, the separator 400 includes a separator plate 410, a first annular plate 420, and a second annular plate 430. The first annular plate 420 is arranged circumferentially along the separator plate 410 and protrudes to one side of the separator plate 410. The second annular plate 430 is arranged circumferentially along the separator plate 410 and protrudes to the other side of the separator plate 410. The separator plate 410 and the first annular plate 420 together form a first mounting cavity 402 on one side of the separator plate 410, and the separator plate 410 and the second annular plate 430 together form a second mounting cavity 403 on the other side of the separator plate 410. The outlet end of the primary filtration unit 310 is inserted into the first mounting cavity 402, and the inlet end of the secondary filtration unit 320 is inserted into the second mounting cavity 403. This arrangement allows the primary filtration unit 310 and the secondary filtration unit 320 to be stably assembled on the separator 400, which not only helps to improve assembly stability but also effectively separates the primary filtration unit 310 and the secondary filtration unit 320.

[0048] Continue to refer to Figure 6 and Figure 7 As shown, the first water passage includes at least one first flow hole 401 disposed on the partition plate 410. The first flow hole 401 is disposed directly opposite the first water outlet passage 201. This arrangement allows purified water entering the first water outlet passage 201 to quickly pass through the partition plate 410 and enter the secondary filtration unit 320. Optionally, multiple first flow holes 401 are provided, and the multiple first flow holes 401 are arranged in a ring. Optionally, the first flow hole 401 is a fan-shaped hole; of course, in other embodiments, the first flow hole 401 can also be a through hole of other shapes such as a round hole or a square hole.

[0049] To achieve stable assembly of the separator 400 and the central tube assembly 200, continue to refer to... Figure 6 and Figure 7 As shown, the separator 400 also includes a first insertion pipe 440 and a second insertion pipe 450 protruding from one side of the separator 410, and a third insertion pipe 460 protruding from the other side of the separator 410. Figure 3 , Figure 4 , Figure 8 and Figure 9 As shown, the first insertion tube 440 is sleeved outside the second insertion tube 450. The first insertion tube 440 is inserted into the first central tube 210, the second insertion tube 450 is inserted into the second central tube 220, and the third insertion tube 460 is inserted into the third central tube 230. This arrangement helps to improve the assembly stability of the central tube assembly 200 within the filter bottle 100. It should be noted that the first flow hole 401 is located precisely on the portion of the partition plate 410 between the first insertion tube 440 and the second insertion tube 450.

[0050] Furthermore, continue to refer to Figure 3As shown, a first sealing element 470 is provided between the first insertion pipe 440 and the first central pipe 210. The first sealing element 470 helps to improve the sealing performance between the first insertion pipe 440 and the first central pipe 210, preventing water from flowing between them. Optionally, the first sealing element 470 is a first sealing ring, and multiple first sealing rings can be provided at intervals as needed to form a multi-layer seal.

[0051] A second seal 480 is provided between the second insertion connector 450 and the second central tube 220. The second seal 480 helps to improve the sealing between the second insertion connector 450 and the second central tube 220, preventing water from flowing between them. Optionally, the second seal 480 is a second sealing ring, and multiple second sealing rings can be provided at intervals as needed to form a multi-layer seal.

[0052] A third seal 490 is provided between the third connector 460 and the third central tube 230. The third seal 490 helps to improve the sealing between the third connector 460 and the third central tube 230, preventing water from flowing between them. Optionally, the third seal 490 is a third sealing ring, and multiple third sealing rings can be provided at intervals as needed to form a multi-layer seal.

[0053] Continue to refer to Figure 8 and Figure 9 As shown, the second water flow channel is a second flow hole 211 provided on the first central pipe 210. Optionally, multiple second flow holes 211 are provided, and the multiple second flow holes 211 are evenly distributed in the first central pipe 210 to improve the water flow volume and water flow rate.

[0054] Continue to refer to Figure 8 As shown, a third flow-through hole 231 is also provided on the third central pipe 230, so that the high calcium-magnesium ratio water generated by the secondary filtration unit 320 can flow laterally into the third central pipe 230. Optionally, multiple third flow-through holes 231 are provided, and the multiple third flow-through holes 231 are evenly distributed in the third central pipe 230 to improve the water flow rate and flow volume.

[0055] Regarding the primary filtration unit 310, depending on the user's requirements for the TDS value and purification level of the effluent, it may include a desalination nanofiltration membrane or a reverse osmosis membrane (RO membrane) to filter out harmful substances in the water and obtain purified water. The recovery rate of the primary filtration unit 310 is 100%.

[0056] Regarding the secondary filtration unit 320, it separates purified water. The secondary filtration unit 320 has a low desalination rate for sodium chloride and calcium chloride, generally below 50%, but a high desalination rate for magnesium ions (mainly magnesium sulfate) in the water. In some embodiments, the secondary filtration unit 320 has a filtration capacity of ≥85% for magnesium sulfate; in other embodiments, it has a filtration capacity of ≥90% for magnesium sulfate. Therefore, the secondary filtration unit 320 can perform secondary separation of magnesium ions (mainly magnesium sulfate), sodium ions (mainly sodium chloride), and calcium ions (mainly calcium chloride) in the water. The secondary filtration unit 320 preferably includes a salt-separating nanofiltration membrane. Of course, in other embodiments, other filter cartridge structures with magnesium ion separation functions can also be selected. In some embodiments, the recovery rate of the secondary filtration unit 320 is 5%-50%.

[0057] Furthermore, the filter assembly 300 also includes a three-stage filtration unit. This three-stage filtration unit is used to reduce the TDS value of the low calcium-magnesium ratio water. Optionally, the three-stage filtration unit can be a desalination nanofiltration membrane or a reverse osmosis membrane (RO membrane) to facilitate optimization according to different product water TDS requirements. Specifically, if the raw water quality is good, the low calcium-magnesium ratio water produced by the primary filtration unit 310 and the secondary filtration unit 320 can already meet the user's needs; however, if the raw water quality is poor, the low calcium-magnesium ratio water produced by the primary filtration unit 310 and the secondary filtration unit 320 can have its TDS value further reduced through the three-stage filtration unit to better meet the user's needs.

[0058] like Figure 3 and Figure 10 As shown, the filter element structure 10 also includes a support member 500, which is disposed inside the filter bottle 100 and is used to support the water inlet end of the primary filtration unit 310. Optionally, the support member 500 includes a support ring plate 510 and a third annular plate 520. The third annular plate 520 is arranged circumferentially along the support ring plate 510 and protrudes to one side of the support ring plate 510. The support ring plate 510 and the third annular plate 520 together form a third mounting cavity, into which the water inlet end of the primary filtration unit 310 is inserted.

[0059] To achieve stable fixing of the support member 500 and the filter bottle 100, the support member 500 further includes a fourth annular plate 530, which is arranged circumferentially along the inner hole of the support ring plate 510 and protrudes to the other side of the support ring plate 510. For example... Figure 11 As shown, the bottle body 110 also includes a first annular portion 111. One of the first annular portion 111 and the fourth annular plate 530 forms a first insertion groove, and the other forms a first insertion part. The first insertion part and the first insertion groove are inserted into each other, thereby realizing the insertion and engagement of the support member 500 and the bottle body 110.

[0060] To ensure stable fixation of the central tube assembly 200 and the filter bottle 100, continue to refer to... Figure 11 As shown, the bottle body 110 also includes a second annular portion 112, which is disposed within the first annular portion 111. One of the second annular portion 112 and the first central tube 210 forms a second insertion groove, and the other forms a second insertion portion. The second insertion portion and the second insertion groove are inserted into each other, thereby realizing the insertion and engagement of the support member 500 with the first central tube 210. The bottle body 110 also includes a third annular portion 113, which is disposed within the second annular portion 112. One of the third annular portion 113 and the second central tube 220 forms a third insertion groove, and the other forms a third insertion portion. The third insertion portion and the third insertion groove are inserted into each other, thereby realizing the insertion and engagement of the support member 500 with the second central tube 220.

[0061] Optionally, continue to refer to Figure 3 As shown, a fourth seal 130 is provided between the first annular portion 111 and the fourth annular plate 530. The fourth seal 130 helps to improve the sealing between the first annular portion 111 and the fourth annular plate 530, preventing water from flowing between them. Optionally, the fourth seal 130 is a fourth sealing ring, and multiple fourth sealing rings can be provided at intervals as needed to form a multi-layer seal.

[0062] Optionally, continue to refer to Figure 3 As shown, a fifth seal 140 is provided between the second annular portion 112 and the first central tube 210. The fifth seal 140 helps to improve the sealing between the second annular portion 112 and the first central tube 210, preventing water from flowing between them. Optionally, the fifth seal 140 is a fifth sealing ring, and multiple fifth sealing rings can be provided at intervals as needed to form a multi-layer seal.

[0063] Optionally, continue to refer to Figure 3 As shown, a sixth seal 150 is provided between the third annular portion 113 and the second central tube 220. The sixth seal 150 helps to improve the sealing between the third annular portion 113 and the second central tube 220, preventing water from flowing between them. Optionally, the sixth seal 150 is a sixth sealing ring, and multiple sixth sealing rings can be provided at intervals as needed to form a multi-layer seal.

[0064] This utility model also provides a water purifier, which includes a housing and the aforementioned filter element structure 10, with the filter element structure 10 disposed inside the housing. By using the aforementioned filter element structure 10, this water purifier can reduce the overall size of the machine and produce purified water rich in magnesium ions.

[0065] The water purifier also includes a water circuit assembly, which includes an inlet pipe and an outlet pipe. The inlet pipe is connected to the inlet 101, and the outlet pipe is connected to at least a portion of the first outlet 102, the second outlet 103, and the third outlet 104.

[0066] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A filter element structure, characterized in that, include: A filter bottle (100) is provided with a water inlet (101); A central tube assembly (200) is disposed inside the filter bottle (100), and a first water outlet channel (201) and a second water outlet channel (202) are formed inside the central tube assembly (200); A filter assembly (300) is disposed inside the filter bottle (100) and sleeved outside the central tube assembly (200). The filter assembly (300) includes a primary filter unit (310) and a secondary filter unit (320) spaced apart axially on the central tube assembly (200). The inlet (101) is connected to the inlet end of the primary filter unit (310). A first water passage is formed between the other end of the first water outlet channel (201) and the secondary filter unit (320). A second water passage is formed between the primary filter unit (310) and the first water outlet channel (201). A third water outlet channel (203) is formed between the filter assembly (300) and the filter bottle (100). The primary filtration unit (310) is used to purify the raw water and adjust the TDS value of the raw water to form purified water; the secondary filtration unit (320) is used to separate at least part of the purified water to form low calcium-magnesium ratio water and high calcium-magnesium ratio water, wherein the calcium-magnesium content ratio in the low calcium-magnesium ratio water is less than that in the high calcium-magnesium ratio water, the high calcium-magnesium ratio water flows to the second outlet channel (202), and the low calcium-magnesium ratio water flows to the third outlet channel (203).

2. The filter element structure according to claim 1, characterized in that, The filter bottle (100) is provided with a first water outlet (102), a second water outlet (103) and a third water outlet (104). One end of the first water outlet channel (201) is connected to the first water outlet (102), the second water outlet channel (202) is connected to the second water outlet (103), and the third water outlet channel (203) is connected to the third water outlet (104). And / or, the primary filtration unit (310) includes an RO membrane or a desalination nanofiltration membrane; And / or, the secondary filtration unit (320) includes a salt separation nanofiltration membrane; And / or, the secondary filtration unit (320) has a desalination rate of magnesium sulfate greater than or equal to 85%; And / or, the secondary filtration unit (320) has a desalination rate of less than 50% for sodium chloride; And / or, the secondary filtration unit (320) has a desalination rate of less than 50% for calcium chloride; And / or, the filtration assembly (300) further includes a three-stage filtration unit for reducing the TDS value of the low calcium-magnesium ratio water, wherein the three-stage filtration unit is a desalination nanofiltration membrane or an RO membrane.

3. The filter element structure according to claim 1, characterized in that, The central tube assembly (200) includes a first central tube (210) and a second central tube (220). The first central tube (210) is sleeved outside the second central tube (220). A first water outlet channel (201) is formed between the second central tube (220) and the first central tube (210). A second water outlet channel (202) is formed inside the second central tube (220). The second central tube (220) includes a first tube portion located inside the first central tube (210) and a second tube portion protruding outside the first central tube (210). The primary filter unit (310) is sleeved outside the first central tube (210), and the secondary filter unit (320) is sleeved outside the second tube portion.

4. The filter element structure according to claim 1, characterized in that, The central tube assembly (200) includes a first central tube (210), a second central tube (220), and a third central tube (230). The first central tube (210) is sleeved outside the second central tube (220), and a first water outlet channel (201) is formed between the second central tube (220) and the first central tube (210). The third central tube (230) is coaxially connected to the second central tube (220), and a second water outlet channel (202) is formed together inside the second central tube (220) and the third central tube (230). The first-stage filtration unit (310) is sleeved outside the first central tube (210), and the second-stage filtration unit (320) is sleeved outside the third central tube (230).

5. The filter element structure according to claim 4, characterized in that, The filter element structure further includes a separator (400), which includes a separator plate (410), a first insertion pipe (440) and a second insertion pipe (450) protruding from one side of the separator plate (410), and a third insertion pipe (460) protruding from the other side of the separator plate (410). The first insertion pipe (440) is sleeved outside the second insertion pipe (450). The first insertion pipe (440) is inserted into the first central tube (210), the second insertion pipe (450) is inserted into the second central tube (220), and the third insertion pipe (460) is inserted into the third central tube (230). The first water passage includes a first flow hole (401) disposed on the separator plate (410) and located between the first insertion pipe (440) and the second insertion pipe (450).

6. The filter element structure according to claim 1, characterized in that, The filter element structure further includes a separator (400), which is disposed between the primary filter unit (310) and the secondary filter unit (320) and is used to support the primary filter unit (310) and the secondary filter unit (320). The first water passage includes at least one first flow hole (401) disposed on the separator (400).

7. The filter element structure according to claim 6, characterized in that, The separator (400) includes a separator plate (410), a first annular plate (420), and a second annular plate (430). The first annular plate (420) protrudes to one side along the circumference of the separator plate (410) to form a first mounting cavity (402). The second annular plate (430) protrudes to the other side along the circumference of the separator plate (410) to form a second mounting cavity (403). The first flow hole (401) is provided on the separator plate (410) and is positioned directly opposite the first water outlet channel (201). The water outlet end of the primary filter unit (310) is inserted into the first mounting cavity (402), and the water inlet end of the secondary filter unit (320) is inserted into the second mounting cavity (403).

8. The filter element structure according to claim 1, characterized in that, The filter element structure also includes a support member (500), which is disposed inside the filter bottle (100). The support member (500) includes a support ring plate (510) and a third annular plate (520). The third annular plate (520) is arranged circumferentially along the support ring plate (510) and protrudes to one side of the support ring plate (510). The support ring plate (510) and the third annular plate (520) together form a third mounting cavity. The water inlet end of the primary filtration unit (310) is inserted into the third mounting cavity.

9. The filter element structure according to claim 4, characterized in that, The filter element structure also includes a support member (500), the support member (500) includes a fourth annular plate (530), the bottle body (110) of the filter bottle (100) includes a first annular portion (111), one of the first annular portion (111) and the fourth annular plate (530) forms a first insertion groove, and the other forms a first insertion part, the first insertion part and the first insertion groove are inserted into each other; And / or, the body (110) of the filter bottle (100) includes a second annular portion (112), one of the second annular portion (112) and the first central tube (210) forms a second insertion groove, and the other forms a second insertion portion, the second insertion portion and the second insertion groove are inserted into each other; And / or, the body (110) of the filter bottle (100) includes a third annular portion (113), one of the third annular portion (113) and the second central tube (220) forms a third insertion groove, and the other forms a third insertion portion, the third insertion portion and the third insertion groove being inserted into each other.

10. A water purifier, characterized in that, It includes a housing and a filter element structure according to any one of claims 1-9, wherein the filter element structure is disposed within the housing.

Images