Filter element and water purifier

Abstract

The utility model belongs to the technical field of water purification equipment, and discloses a filter element and a water purifier. A filter assembly of the filter element comprises a first-stage filter unit and a second-stage filter unit. According to the filter element, the first-stage filter unit and the second-stage filter unit are integrated in the same filter bottle, and a multi-stage split design is replaced by an integrated composite design, so that the integration level of the filter element is improved, and the volume of the filter element is reduced; the primary filtering unit adopted by the filter element can divide raw water into first water flow with higher magnesium ion content and second water flow with lower magnesium ion content, the first water flow flows to the secondary filtering unit and forms concentrated water and purified water after being filtered and divided by the secondary filtering unit, the TDS value of the first water flow is reduced by the secondary filtering unit, and the TDS value of the second water flow is reduced by the secondary filtering unit. Therefore, the content of magnesium ions in the purified water is adjusted to a proper range. Compared with purified water provided by an existing water purification filter element, the content of magnesium ions in the purified water generated by the water purification filter element is improved, and the mode of increasing the content of the magnesium ions 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 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 filters have a high magnesium ion retention rate, which can lead to insufficient magnesium absorption if users drink water from purifiers long-term. Current technologies typically introduce minerals into the water purification system artificially, posing certain risks to hygiene and safety. Utility Model Content

[0003] The purpose of this invention is to provide a filter element and a water purifier, which not only has a high degree of integration, but also effectively increases the magnesium ion content in the produced water.

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

[0005] A filter element includes: a filter bottle with an inlet; and a filter assembly disposed within the filter bottle, the filter assembly including a primary filtration unit and a secondary filtration unit. The inlet is connected to the inlet of the primary filtration unit, and a first water flow channel is formed between the primary filtration unit and the secondary filtration unit. The primary filtration unit is used to divert raw water into a first water flow and a second water flow. The magnesium ion content in the first water flow is higher than that in the second water flow. The first water flow enters the secondary filtration unit through the first water flow channel. The secondary filtration unit is used to adjust the TDS value of the first water flow and to split the first water flow into concentrated water and purified water. The magnesium ion content in the purified water is lower than that in the first water flow.

[0006] Preferably, the primary filtration unit includes a salt separation nanofiltration membrane; and / or, the primary filtration unit has a desalination rate of magnesium sulfate greater than or equal to 85%; and / or, the primary filtration unit has a desalination rate of sodium chloride less than 40%; and / or, the primary filtration unit has a desalination rate of calcium chloride less than 40%; and / or, the secondary filtration unit includes a salt separation nanofiltration membrane, a desalination nanofiltration membrane, or a reverse osmosis membrane.

[0007] Preferably, the filter element further includes: a central tube assembly disposed inside the filter bottle, and the filter assembly sleeved outside the central tube assembly; a first water outlet channel and a second water outlet channel are formed inside the central tube assembly; a first water outlet and a second water outlet are formed on the filter bottle; a second water passage channel is formed between the primary filtration unit and the first water outlet channel; the first water outlet channel communicates with the first water outlet; the second water outlet channel communicates with the second water outlet; the second water flow is discharged from the first water outlet; and the purified water is discharged from the second water outlet; or... A first water outlet channel is formed within the central tube assembly, a first water outlet is formed on the filter bottle, a second water passage is formed between the primary filtration unit and the first water outlet channel, the first water outlet channel is connected to the first water outlet, the purified water and the second water flow both flow into the first water outlet channel and mix before being discharged from the first water outlet; and / or, a third water outlet is formed on the filter bottle, a third water outlet channel is formed between the filtration assembly and the filter bottle, the third water outlet channel is connected to the third water outlet, and the concentrated water is discharged from the third water outlet.

[0008] Preferably, the central tube assembly extends along a first direction, and the primary filter unit and the secondary filter unit are spaced apart in the first direction; the primary filter unit is located between the secondary filter unit and the water inlet; or, the secondary filter unit is located between the primary filter unit and the water inlet.

[0009] 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, a second water outlet channel being formed inside the second central tube, the second central tube including 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.

[0010] 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.

[0011] Preferably, the filter element 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 at least one first flow hole disposed on the separator plate and located on the outer side of the first insertion pipe away from the second insertion pipe.

[0012] Preferably, the filter element further includes a separator, which is supported between the primary filtration unit and the secondary filtration unit, and the first water passage includes at least one first flow hole disposed on the separator.

[0013] Preferably, the separator includes a separator plate, a first mounting cavity formed on one side of the separator plate, and a second mounting cavity formed on the other side of the separator plate. The first water passage includes at least one first flow hole provided on the separator plate. The first flow hole is disposed opposite to the primary filter unit and the secondary filter unit. The water outlet of the primary filter unit is inserted into the first mounting cavity, and the water inlet of the secondary filter unit is inserted into the second mounting cavity.

[0014] Preferably, the filter element 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.

[0015] A water purifier includes a housing and the aforementioned filter element, wherein the filter element is disposed within the housing.

[0016] The beneficial effects of this utility model are:

[0017] The filter element provided by this utility model includes a filter bottle, a central tube assembly, and a filtration assembly. This filter element integrates a primary filtration unit and a secondary filtration unit within the same filter bottle, using an integrated composite design to replace a multi-stage, separate design, thus improving the integration of the filter element and reducing its volume. The primary filtration unit of this filter element can divert raw water into a first water stream with a higher magnesium ion content and a second water stream with a lower magnesium ion content. The first water stream flows to the secondary filtration unit, where it is filtered and diverted to form concentrated water and purified water. The secondary filtration unit reduces the TDS value of the first water stream, thereby adjusting the magnesium ion content in the purified water to a suitable range. Compared to the purified water provided by existing water purifiers, the purified water produced by the filter element provided by this utility model has a higher magnesium ion content, and this method of increasing magnesium ion content is safe and reliable. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the filter element of this utility model;

[0019] Figure 2 This is a bottom view of the filter element of this utility model;

[0020] Figure 3 yes Figure 2 A cross-sectional view along the AA direction;

[0021] Figure 4 yes Figure 2 Cross-sectional view along the BB direction;

[0022] Figure 5 This is a top view of the bottle body of the filter element of this utility model;

[0023] Figure 6 This is a schematic diagram of the separator of the filter element of this utility model;

[0024] Figure 7 This is a schematic diagram of the separator of the filter element of this utility model from another perspective;

[0025] Figure 8 This is an assembly drawing of the separator and central tube assembly of the filter element of this utility model;

[0026] Figure 9 This is an assembly diagram of the separator and central tube assembly of the filter element of this utility model from another perspective;

[0027] Figure 10 This is a schematic diagram of the support component for the filter element of this utility model;

[0028] Figure 11 This is a cross-sectional view of the bottle body of the filter element of this utility model.

[0029] In the picture:

[0030] 10. Filter element;

[0031] 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;

[0032] 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;

[0033] 300. Filter assembly; 310. Primary filter unit; 320. Secondary filter unit;

[0034] 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;

[0035] 500, Support component; 510, Support ring plate; 520, Third ring plate; 530, Fourth ring plate. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] like Figures 1 to 5 As shown, this utility model discloses a filter element 10, which is used in a water purifier to purify raw water into purified water that meets user needs. Specifically, the filter element 10 includes a filter bottle 100 and a filter assembly 300. The filter bottle 100 is provided with a water inlet 101 for supplying raw water. The filter assembly 300 is disposed inside the filter bottle 100 and includes a primary filtration unit 310 and a secondary filtration unit 320. The water inlet 101 is connected to the water inlet end of the primary filtration unit 310, and a first water flow channel is formed between the primary filtration unit 310 and the secondary filtration unit 320. The primary filtration unit 310 is used to split the raw water into a first water flow and a second water flow. The magnesium ion content in the first water flow is higher than that in the second water flow. The first water flow enters the secondary filtration unit 320 through the first water passage. The secondary filtration unit 320 is used to adjust the TDS value of the first water flow and split the first water flow into concentrated water and purified water. The magnesium ion content in the purified water is lower than that in the first water flow.

[0041] Compared to the multi-stage, separate filter cartridges used in existing technologies, the filter cartridge 10 provided by this invention adopts an integrated composite design, integrating the primary filtration unit 310 and the secondary filtration unit 320 within the same filter bottle 100, thereby improving the integration of the filter cartridge 10 and reducing its volume. Furthermore, the primary filtration unit 310 of this filter cartridge 10 can redistribute magnesium ions, thus splitting the raw water into a first water flow with a higher magnesium ion content and a second water flow with a lower magnesium ion content. For example, 95% of the magnesium ions in the raw water are in the first water flow, and 5% are in the second water flow. The first water flow then flows to the secondary filtration unit 320, where the TDS value can be further altered. After passing through the secondary filtration unit 320, the first water flow is split into concentrated water and purified water, thereby adjusting the magnesium ion content in the purified water to a suitable range. Compared to existing water purifiers, the filter element 10 provided by this invention produces water with increased magnesium ion content. Compared to artificially adding minerals, directly utilizing the minerals in the raw water to increase the magnesium ion content in the output water is safer and more reliable. Drinking water rich in magnesium ions can effectively prevent hypomagnesemia. Furthermore, drinking water with high magnesium ion content can promote calcium ion absorption, thus preventing hypocalcemia. Long-term consumption is beneficial for improving the user's physical health.

[0042] Continue to refer to Figure 4 As shown, the filter element 10 also includes a central tube assembly 200, which is disposed inside the filter bottle 100, and the filter assembly 300 is sleeved on the outside of the central tube assembly 200. The central tube assembly 200 is used to support the primary filtration unit 310 and the secondary filtration unit 320, and to assist in forming the water outlet channel.

[0043] In some embodiments, the filter bottle 100 is provided with a first outlet 102, a second outlet 103, and a third outlet 104. The first outlet 102, the second outlet 103, and the third outlet 104 are used for water discharge, and the water flowing out of the filter element 10 through different outlets has different quality. A first outlet channel 201 and a second outlet channel 202 are formed within the central tube assembly 200. The first outlet channel 201 communicates with the first outlet 102, and the second outlet channel 202 communicates with the second outlet 103. A second water passage is formed between the primary filtration unit 310 and the first outlet channel 201, and a third outlet channel 203 is formed between the filter assembly 300 and the filter bottle 100. The third outlet channel 203 communicates with the third outlet 104.

[0044] The detailed process of purifying raw water using the filter element 10 with the above structure 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 has the ability to separate magnesium ions from calcium and sodium ions, so that after the raw water passes through the primary filtration unit 310, it can form a first water flow with high magnesium ion content and low calcium and magnesium ion content, and a second water flow with low magnesium ion content and high calcium and magnesium ion content. The second water flow enters the first water outlet channel 201 through the second water passage and is finally discharged from the first water outlet 102. This part of the water can be used for... The water can be returned to the inlet 101 or used for direct drinking; while the first water flow continues to flow into the secondary filtration unit 320. The first water flow enters the secondary filtration unit 320 through the first water passage. The secondary filtration unit 320 can be used to adjust the TDS value of the water in the first water flow. The TDS value is also known as the total dissolved solids. After filtration, the water entering the secondary filtration unit 320 forms concentrated water and purified water. The purified water flows to the second outlet channel 202 and is finally discharged from the filter element 10 from the second outlet 103, while the concentrated water flows to the third outlet channel 203 and is finally discharged from the filter element 10 from the third outlet 104.

[0045] In some parallel embodiments, the central tube assembly 200 may also have only a first water outlet channel 201, the filter bottle 100 may have a first water outlet 102, a second water passage may be formed between the primary filtration unit 310 and the first water outlet channel 201, the first water outlet channel 201 may be connected to the first water outlet 102, the purified water formed by the secondary filtration unit 320 and the second water flow formed by the primary filtration unit 310 may both flow to the first water outlet channel 201, and after mixing in the first water outlet channel 201, they may be discharged from the first water outlet 102.

[0046] 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.

[0047] The central tube assembly 200 is used to mount the filter assembly 300 and form a water outlet channel. In some embodiments, the central tube assembly 200 extends along a first direction, and the primary filter unit 310 and the secondary filter unit 320 are spaced apart in the first direction, with the primary filter unit 310 located between the secondary filter unit 320 and the inlet 101. This arrangement allows water entering the filter bottle 100 from the inlet 101 to directly enter the primary filter unit 310, which simplifies the flow channel formed within the filter bottle 100.

[0048] Of course, in some other embodiments, the positions of the primary filter unit 310 and the secondary filter unit 320 can also be interchanged, that is, the secondary filter unit 320 is placed between the primary filter unit 310 and the inlet 101. This arrangement allows the third outlet channel 203 to be used as an inlet channel, the original inlet 101 to be used as the third outlet 104, and the original third outlet 104 to be used as the inlet 101.

[0049] Continue to refer to Figure 4 As 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.

[0050] 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.

[0051] 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 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. The first central tube 210 and the third central tube 230 are connected and together form a first water outlet channel 201, so that the purified water formed by the secondary filtration unit 320 and the second water flow formed by the primary filtration unit 310 both flow to the first water outlet channel 201 and mix there.

[0052] To separate the primary filtration unit 310 and the secondary filtration unit 320, so that the water of different qualities flowing out separately does not easily mix, such as Figure 3 , Figure 6 and Figure 7 As shown, the filter element 10 also includes a separator 400, which is disposed between the primary filtration unit 310 and the secondary filtration unit 320.

[0053] 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.

[0054] Continue to refer to Figure 6 and Figure 7 As shown, the first water flow channel includes at least one first flow hole 401 disposed on the partition plate 410. Optionally, multiple first flow holes 401 are provided, and the multiple first flow holes 401 are arranged in a ring. In this embodiment of the present invention, the first flow hole 401 is disposed directly opposite the primary filtration unit 310 and the secondary filtration unit 320.

[0055] To achieve stable assembly of the separator 400 and the central tube assembly 200, continue to refer to... Figure 6 and Figure 7As 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. In this embodiment of the invention, the first flow hole 401 is located on the outer side of the first insertion tube 440, away from the second insertion tube 450.

[0056] Furthermore, continue to refer to Figure 3 As 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] Continue to refer to Figure 8As shown, a third flow-through hole 231 is also provided on the third central pipe 230, so that the purified 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.

[0061] Regarding the primary filtration unit 310, it may include a salt-separating nanofiltration membrane with magnesium ion separation function. In some embodiments, the salt-separating nanofiltration membrane has a filtration function with a magnesium sulfate desalination rate ≥85%; in some embodiments, the salt-separating nanofiltration membrane has a magnesium sulfate desalination rate ≥90%; in some embodiments, the salt-separating nanofiltration membrane has a magnesium sulfate desalination rate ≥95%; in some embodiments, the salt-separating nanofiltration membrane has a sodium chloride desalination rate <40%; in some embodiments, the salt-separating nanofiltration membrane has a calcium chloride desalination rate <40%. This configuration allows the salt-separating nanofiltration membrane with magnesium ion separation function to separate magnesium ions (mainly magnesium sulfate), sodium ions (mainly sodium chloride), and calcium ions (mainly calcium chloride) in the water. Of course, in other embodiments, a filter element structure with magnesium ion separation function may also be selected.

[0062] Regarding the secondary filtration unit 320, it can include a salt separation nanofiltration membrane, a desalination nanofiltration membrane, or a reverse osmosis membrane, depending on the user's requirements for the TDS value of the effluent and the degree of water purification. Optionally, the desalination rate of the secondary filtration unit 320 for magnesium sulfate is less than that of the primary filtration unit 310 for magnesium sulfate. In one specific embodiment, the desalination rate of the secondary filtration unit 320 for magnesium sulfate is greater than 90%.

[0063] In some embodiments, the recovery rate of the primary filtration unit 310 is 5%-40%; the recovery rate of the secondary filtration unit 320 is 45%-85%.

[0064] like Figure 3 and Figure 11 As shown, the filter element 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] This utility model also provides a water purifier, which includes a housing and the aforementioned filter element 10. The filter element 10 is placed inside the housing. By using the aforementioned filter element 10, the water purifier can reduce the overall size of the machine and produce purified water rich in magnesium ions.

[0071] Furthermore, 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.

[0072] 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, characterized in that, include: A filter bottle (100) is provided with a water inlet (101); A filter assembly (300) is disposed inside the filter bottle (100). The filter assembly (300) includes a primary filter unit (310) and a secondary filter unit (320). The water inlet (101) is connected to the water inlet end of the primary filter unit (310). A first water flow channel is formed between the primary filter unit (310) and the secondary filter unit (320). The primary filtration unit (310) is used to divert the raw water into a first water flow and a second water flow. The magnesium ion content in the first water flow is higher than that in the second water flow. The first water flow enters the secondary filtration unit (320) through the first water passage. The secondary filtration unit (320) is used to adjust the TDS value of the first water flow and to divert the first water flow into concentrated water and purified water. The magnesium ion content in the purified water is lower than that in the first water flow.

2. The filter element according to claim 1, characterized in that, The primary filtration unit (310) includes a salt separation nanofiltration membrane; And / or, the primary filtration unit (310) has a desalination rate of magnesium sulfate greater than or equal to 85%; And / or, the primary filtration unit (310) has a desalination rate of less than 40% for sodium chloride; And / or, the primary filtration unit (310) has a desalination rate of less than 40% for calcium chloride; And / or, the secondary filtration unit (320) includes a salt separation nanofiltration membrane, a desalination nanofiltration membrane, or a reverse osmosis membrane.

3. The filter element according to claim 1, characterized in that, The filter element further includes: a central tube assembly (200) disposed inside the filter bottle (100), and the filter assembly (300) sleeved outside the central tube assembly (200); The central tube assembly (200) has a first water outlet channel (201) and a second water outlet channel (202) formed inside. The filter bottle (100) has a first water outlet (102) and a second water outlet (103) formed on it. A second water passage is formed between the primary filtration unit (310) and the first water outlet channel (201). The first water outlet channel (201) is connected to the first water outlet (102), and the second water outlet channel (202) is connected to the second water outlet (103). The second water flow is discharged from the first water outlet (102), and the purified water is discharged from the second water outlet (103). Alternatively, a first water outlet channel (201) is formed inside the central tube assembly (200), a first water outlet (102) is formed on the filter bottle (100), a second water passage is formed between the primary filtration unit (310) and the first water outlet channel (201), the first water outlet channel (201) is connected to the first water outlet (102), and the purified water and the second water flow both flow to the first water outlet channel (201) and mix before being discharged from the first water outlet (102); And / or, a third outlet (104) is formed on the filter bottle (100), a third outlet channel (203) is formed between the filter assembly (300) and the filter bottle (100), the third outlet channel (203) is connected to the third outlet (104), and the concentrated water is discharged from the third outlet (104).

4. The filter element according to claim 3, 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.

5. The filter element according to claim 3, 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).

6. The filter element according to claim 5, characterized in that, The filter element 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 at least one first flow hole (401) disposed on the separator plate (410) and located on the outside of the first insertion pipe (440) away from the second insertion pipe (450).

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

8. The filter element according to claim 7, characterized in that, The separator (400) includes a separator plate (410), a first mounting cavity (402) formed on one side of the separator plate (410), and a second mounting cavity (403) formed on the other side of the separator plate (410). The first water passage includes at least one first flow hole (401) provided on the separator plate (410). The first flow hole (401) is disposed opposite to the primary filter unit (310) and the secondary filter unit (320). 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).

9. The filter element according to claim 1, characterized in that, The filter element 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.

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

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