Water purification assembly and water purification device

Abstract

The present application relates to water purification technical field, provide a kind of water purification assembly and water purification equipment, above-mentioned water purification assembly includes filter core, including capacitive deionization filter core and post filter core, the capacitive deionization filter core and the post filter core are coaxially arranged;The capacitive deionization filter core includes water outlet pipe and electrode assembly, the electrode assembly is wound in the peripheral wall of the water outlet pipe, the post filter core is formed with first water outlet, the water outlet pipe has first water outlet passage and first water pass hole and second water outlet, which are communicated with the first water outlet passage, the first water pass hole is arranged in the peripheral wall of the water outlet pipe;Wherein, water body can successively pass through the electrode assembly, the second water outlet and the outside of the post filter core, then from the first water outlet discharge.Such, capacitive deionization filter core and post filter core are integrated into one, simplify the waterway structure of existing water purification assembly.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and more particularly to a water purification component and a water purification device. Background Technology

[0002] Capacitive Deionization (CDI) is a water desalination and purification technology based on the double-layer capacitance theory. Its basic principle is that when a low voltage is applied to the electrodes, cations, anions, or charged particles in the solution migrate towards the electrodes under the influence of the electric field and concentration gradient, adsorbing onto the electrode surface to form an electric double layer, thereby achieving desalination or purification. CDI technology can achieve different effluent water qualities under different voltages, while retaining ions beneficial to the human body and removing heavy metal ions. In related technologies, CDI filter cartridges are usually combined with other filter cartridges used for physical filtration to ensure water purification effects. However, because each filter cartridge is used independently, this combination of components not only creates a complex water circuit, making it difficult to ensure purification effects, but also occupies a large space, which is not conducive to application in water purification equipment. Summary of the Invention

[0003] This invention aims to at least solve one of the technical problems existing in related technologies. To this end, this invention proposes a water purification component that integrates a capacitive deionization filter and a post-filter into one unit, occupying little space, simplifying the water circuit structure of existing water purification components, and facilitating its application in water purification equipment.

[0004] This invention also proposes a water purification device.

[0005] A water purification assembly according to a first aspect of the present invention includes:

[0006] The filter element includes a capacitive deionization filter element and a post-filter element, which are coaxially arranged. The capacitive deionization filter element includes a water outlet pipe and an electrode assembly. The electrode assembly is wound around the peripheral wall of the water outlet pipe. The post-filter element has a first water outlet. The water outlet pipe has a first water outlet channel and a first water passage hole and a second water outlet communicating with the first water outlet channel. The first water passage hole is located on the peripheral wall of the water outlet pipe. Water can sequentially pass through the electrode assembly, the second water outlet, and the outer surface of the post-filter element, and then be discharged from the first water outlet.

[0007] According to one embodiment of the present invention, the electrode assembly includes: an insulating sheet and at least two layers of electrode sheets, wherein the insulating sheet and the electrode sheets are stacked, and the insulating sheet is sandwiched between two adjacent layers of electrode sheets;

[0008] The electrode sheet includes a current collector layer and an adsorption layer, and the adsorption layer is provided on both the front and back sides of the current collector layer; adjacent two electrode sheets are respectively configured as positive electrode sheets and negative electrode sheets, and a water passage is formed between the positive electrode sheet and the negative electrode sheet to accommodate the insulating sheet;

[0009] The electrode assembly is formed as an outlet end and an inlet end relative to the inner and outer ends of the outlet pipe; the inlet end is connected to the outlet end through the water passage, and the outlet end extends toward the peripheral wall of the outlet pipe and forms fluid communication with the first water passage hole.

[0010] According to one embodiment of the present invention, the adsorption layer comprises activated carbon, titanium dioxide, a conductive agent and a binder, wherein the mass ratio of the activated carbon to the titanium dioxide is (5~1):1.

[0011] According to one embodiment of the present invention, the activated carbon has a particle size of 5-15 μm and a specific surface area of ​​1500-2200 m². 2 / g, wherein the average pore size of the activated carbon is 1-5nm.

[0012] According to one embodiment of the present invention, the titanium dioxide has a particle size of 0.25-1.5 mm and a surface area of ​​200-240 m². 2 / g, the average pore size of the titanium dioxide is 6-9nm.

[0013] According to one embodiment of the present invention, the conductive agent accounts for 2% to 5% of the total mass of the adsorption layer;

[0014] And / or, based on the total mass of the adsorption layer, the mass percentage of the adhesive is 5% to 10%.

[0015] According to one embodiment of the present invention, the filter element further includes a first end cap, the first end cap including a housing and a sealing plate, the housing being disposed at the first end of the capacitive deionization filter element, the housing having a storage space and a first opening and a second opening communicating with the storage space, the post-filter element being confined between the top wall of the storage space and the sealing plate, a first gap being left between the sealing plate and the bottom wall of the storage space, a second gap being left between the post-filter element and the side wall of the storage space, the first gap communicating with the second gap, the first outlet communicating with the first opening, and the second outlet communicating with the second gap through the second opening.

[0016] According to one embodiment of the present invention, the box includes a box body and a cover that are sealed together, the box body and the cover forming the storage space, the cover being glued to the first end of the capacitor deionization filter element, the cover having a second opening, and the box body having a first opening.

[0017] According to one embodiment of the present invention, the post-filter cartridge is provided with a second water outlet channel, the second water outlet channel forming the first water outlet, and a first annular support portion is formed inside the housing near the first opening, the outer side of the first annular support portion abutting against the inner wall of the second water outlet channel; and / or,

[0018] The sealing plate has a second annular support portion formed on the side facing the rear filter element, and the outer side of the second annular support portion abuts against the inner wall of the second water outlet channel.

[0019] According to an embodiment of the present invention, the water purification assembly further includes a first housing and a second housing connected to each other. The first housing is provided with a first insertion hole and a second insertion hole. The electrode assembly has a positive electrode tab and a negative electrode tab. The positive electrode tab and the negative electrode tab are located inside the first housing. At least a portion of the positive electrode tab is exposed in the first insertion hole, and at least a portion of the negative electrode tab is exposed in the second insertion hole. The outer side of the filter element is sealed to the inner wall of the second housing, and a third gap is left between the outer side of the filter element and the inner wall of the second housing. The second housing is provided with a purified water outlet and a raw water inlet communicating with the third gap. The first outlet is communicating with the purified water outlet.

[0020] According to one embodiment of the present invention, the filter element further includes a second end cap, the second end cap including a side wall, a top wall and a sealant wall connected in sequence by bending, the side wall being connected to the inner wall of the first housing, the top wall being bonded to the second end of the capacitive deion filter element, the inner side of the sealant wall being connected to the outer side of the capacitive deion filter element, and the outer side of the sealant wall being sealed to the inner wall of the second housing; wherein, the side wall encloses to form an installation space, the top wall is provided with a first through hole and a second through hole, the positive electrode tab passes through the first through hole and extends into the installation space, and the negative electrode tab passes through the second through hole and extends into the installation space.

[0021] According to one embodiment of the present invention, the filter element further includes a fixing seat, the fixing seat is disposed on the side wall, and is provided with a first positioning hole corresponding to the positive electrode tab and a second positioning hole corresponding to the negative electrode tab;

[0022] The capacitor deionization filter element further includes a positive electrode electrical connector and a negative electrode electrical connector. The positive electrode electrical connector is inserted through the first positioning hole and is detachably connected to the positive electrode tab. The negative electrode electrical connector is inserted through the second positioning hole and is detachably connected to the negative electrode tab.

[0023] According to one embodiment of the present invention, each of the first positioning hole and the second positioning hole is a stepped hole, the stepped hole is provided with a stepped surface, and the outer side of each of the positive electrode electrical connector and the negative electrode electrical connector is provided with an abutting surface, the abutting surface abutting against the stepped surface.

[0024] According to one embodiment of the present invention, the fixing seat is detachably disposed on the inner side of the side wall, the fixing seat is provided with a slot on the side facing the top wall, and the inner side of the side wall is provided with a buckle. The fixing seat and the second end cover are engaged in the circumferential direction through the slot and the buckle.

[0025] According to one embodiment of the present invention, each of the positive and negative electrical connectors has a slot on its connection surface, and the corresponding tab is inserted into the slot.

[0026] According to one embodiment of the present invention, the inner wall of the second housing is provided with a partition, and the partition and the end of the post-filter element away from the capacitor deionization filter element enclose a water outlet space, and the first water outlet is connected to the purified water outlet through the water outlet space.

[0027] According to one embodiment of the present invention, the filter element further includes a guide tube, a second water outlet is formed at the first end of the water outlet pipe, the second end of the water outlet pipe is closed, the guide tube is inserted into the water outlet pipe to form a water passage gap between the guide tube and the water outlet pipe; the peripheral wall of the first end of the guide tube is sealed to the inner wall of the water outlet pipe, and a second water passage hole is formed between the second end of the guide tube and the second end of the water outlet pipe;

[0028] The first water passage hole, the water passage gap, the second water passage hole, the inner cavity of the guide pipe, and the second water outlet are sequentially connected in a fluid communication.

[0029] According to a second aspect of the present invention, a water purification device includes: a body and a water purification component as described above; the body has a mounting cavity, and the water purification component is detachably disposed in the mounting cavity.

[0030] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0031] Water enters the first outlet channel of the capacitive deionization filter cartridge through the electrode assembly. The water filtered by the capacitive deionization filter cartridge flows out through the second outlet, which is located along the axial direction of the cartridge. The water flowing out of the second outlet passes through the outer surface of the post-filter cartridge and enters the post-filter cartridge. Finally, the water filtered by the post-filter cartridge flows out through the first outlet, which is located along the axial direction of the post-filter cartridge. By integrating the capacitive deionization filter cartridge and the post-filter cartridge into a single unit, a composite filter cartridge is formed. This composite filter cartridge occupies less space and simplifies the water circuit structure of existing water purification components.

[0032] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0034] Figure 1 This is one of the structural schematic diagrams of the water purification component provided in the embodiments of the present invention.

[0035] Figure 2 This is the second structural schematic diagram of the water purification component provided in the embodiment of the present invention.

[0036] Figure 3 This is the third structural schematic diagram of the water purification component provided in the embodiment of the present invention.

[0037] Figure 4 This is a schematic diagram of the structure of the capacitor deionization filter element provided in an embodiment of the present invention.

[0038] Figure 5 This is one of the structural schematic diagrams of the assembly of the water outlet pipe and the guide pipe provided in the embodiment of the present invention.

[0039] Figure 6 This is the second schematic diagram of the assembly of the water outlet pipe and the guide pipe provided in the embodiment of the present invention.

[0040] Figure 7 This is provided by the embodiments of the present invention. Figure 6 A magnified view of part K in the middle.

[0041] Figure 8 This is a schematic diagram of the structure of the electrode assembly wound around the water outlet pipe according to an embodiment of the present invention.

[0042] Figure 9This is a schematic diagram of the structure of the first end cap provided in an embodiment of the present invention.

[0043] Figure 10 This is a schematic diagram of the structure of the fixing base provided in an embodiment of the present invention.

[0044] Figure 11 This is a schematic diagram of the filter element provided in an embodiment of the present invention.

[0045] Figure 12 This is a cross-sectional schematic diagram of the electrode assembly stacking configuration provided in an embodiment of the present invention.

[0046] Figure 13 This is a cross-sectional schematic diagram of the electrode sheet provided in an embodiment of the present invention.

[0047] Figure label:

[0048] 1. Housing; 11. First housing; 12. Second housing; 101. Water inlet port; 102. Water outlet port; 103. First insertion hole; 104. Second insertion hole; 111. Water outlet space; 112. Accommodation space; 121. Partition plate;

[0049] 2. Filter element; 20. Capacitor deionization filter element; 21. Water outlet pipe; 22. Electrode assembly; 23. Guide pipe; 24. Post-filter element; 241. Second water outlet channel; 2411. First water outlet; 211. First water passage hole; 212. Second water outlet; 201. Water passage gap; 202. Second water passage hole; 230. Sealing component; 2301. Sealing plate; 2302. Protrusion; 221. Insulating sheet; 222. Electrode sheet; 2201. Water passage channel; 2221. Current collector layer; 2222. Adsorption layer; 2223. Positive electrode tab; 2224. Negative electrode tab;

[0050] 3. Second end cap; 31. Side wall; 311. Buckle; 32. Top wall; 321. Baffle plate; 322. First through hole; 33. First baffle wall;

[0051] 4. First end cap; 41. Box body; 411. First annular support part; 412. Second baffle wall; 413. Third annular support part; 414. Annular guide part; 42. Sealing plate; 421. Second annular support part;

[0052] 5. Electrical connection components; 51. Positive electrical connector; 52. Negative electrical connector;

[0053] 6. Fixing base; 61. Slot; 62. First positioning hole. Detailed Implementation

[0054] The embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of the invention.

[0055] In the description of the embodiments of the present invention, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the embodiments of the present invention and for simplifying the description, 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 the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, in the description of the present invention, unless otherwise stated, "multiple," "multiple roots," and "multiple groups" mean two or more.

[0056] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0057] In embodiments of the present invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0058] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0059] The following is combined Figures 1 to 13 The water purification components and water purification equipment provided in the embodiments of the present invention will be described in detail through specific embodiments and application scenarios.

[0060] like Figure 2 , Figure 3 and Figure 4 As shown, the water purification component of this embodiment includes a filter element 2. The filter element 2 includes a capacitive deionization filter element 20 and a post-filter element 24, which are coaxially arranged.

[0061] The capacitive deionization filter element 20 includes an outlet pipe 21 and an electrode assembly 22. The electrode assembly 22 is wound around the peripheral wall of the outlet pipe 21. The post-filter element 24 has a first outlet 2411. The outlet pipe 21 has a first outlet channel and a first water passage hole 211 and a second outlet 212 connected to the first outlet channel. The first water passage hole 211 is located on the peripheral wall of the outlet pipe 21. Water can pass through the electrode assembly 22, the second outlet 212 and the outer surface of the post-filter element 24 in sequence, and then be discharged from the first outlet 2411.

[0062] Understandably, the electrode assembly 22 typically includes stacked positive and negative electrode plates, which are isolated from each other, and a flow channel for water supply is formed between the positive and negative electrode plates. When the electrode assembly 22 is wound, the inner side of one end of the electrode assembly 22 contacts the peripheral wall of the water outlet pipe 21, and then the electrode assembly 22 is wound layer by layer with the water outlet pipe 21 as the central axis until the electrode assembly 22 is wound into a columnar distribution.

[0063] Since the electrode assembly 22 is wound around the peripheral wall of the outlet pipe 21 and both ends of the electrode assembly 22 are sealed along the axial direction of the outlet pipe 21, when a positive voltage is applied to the positive and negative electrodes, cations, anions, or charged particles in the water will migrate to the surface of the positive and negative electrodes under the action of the electric field force, so that the inner side of the electrode assembly 22 outputs desalinated water; when a reverse voltage is applied to the positive and negative electrodes, or when the voltage is stopped, the anions, cations, or charged particles adsorbed on the surface of the positive and negative electrodes will automatically detach, so that the inner side of the electrode assembly 22 outputs wastewater with a higher concentration.

[0064] It should be noted that the post-filter 24 can be a carbon rod, which can further adsorb organic matter and improve the taste, while intercepting impurities such as the adsorption layer 2222 that may fall off the capacitive deion filter 20.

[0065] Water enters the first outlet channel of the capacitive deionization filter element 20 through the electrode assembly 22. The water filtered by the capacitive deionization filter element 20 flows out through the second outlet 212, which is located along the axial direction of the capacitive deionization filter element 20. The water flowing out of the second outlet 212 passes through the outer side of the post-filter element 24 and enters the post-filter element 24. Finally, the water filtered by the post-filter element 24 flows out through the first outlet 2411, which is located along the axial direction of the post-filter element 24. By integrating the capacitive deionization filter element 20 and the post-filter element 24 into one unit, a composite filter element is formed. This composite filter element occupies less space and simplifies the water circuit structure of existing water purification components.

[0066] In some embodiments, such as Figure 8 , Figure 12 and Figure 13 As shown, the electrode assembly 22 includes: an insulating sheet 221 and at least two layers of electrode sheets 222. The insulating sheet 221 and the electrode sheets 222 are stacked, and the insulating sheet 221 is sandwiched between two adjacent layers of electrode sheets 222.

[0067] The electrode sheet 222 includes a current collector layer 2221 and an adsorption layer 2222. The current collector layer 2221 has an adsorption layer 2222 on both its front and back sides. Two adjacent electrode sheets 222 are respectively configured as a positive electrode sheet and a negative electrode sheet. A water passage 2201 for accommodating the insulating sheet 221 is formed between the positive electrode sheet and the negative electrode sheet.

[0068] The electrode assembly 22 is formed as an outlet end and an inlet end relative to the inner and outer ends of the outlet pipe 21. The inlet end is connected to the outlet end through the water passage 2201, and the outlet end extends to the peripheral wall of the outlet pipe 21 and forms a fluid communication with the first water passage hole 211.

[0069] Understandably, the insulating sheet 221 and the electrode sheet 222 are stacked in an alternating arrangement to sandwich the insulating sheet 221 between two adjacent layers of electrode sheets 222. Since the adjacent layers of electrode sheets 222 are respectively configured as positive and negative electrodes, when the number of electrode sheets 222 is greater than two layers, in order to meet the filtration requirements of the electrode assembly 22 for raw water, when designing the power supply of the electrode assembly 22, the positive and negative electrodes can be arranged alternately in the stacking direction, with the insulating sheet 221 sandwiched between the positive and negative electrodes. Furthermore, the current collector layer 2221 of the positive electrode is electrically connected to the positive terminal of the power supply, and the current collector layer 2221 of the negative electrode is electrically connected to the negative terminal of the power supply. When the number of electrode sheets 222 is equal to two layers, the insulating sheet 221 can be directly sandwiched between the positive and negative electrodes.

[0070] For electrode 222, the current collector layer 2221 of electrode 222 can be made of metal or graphite material so that the current collector layer 2221 forms a conductive layer, and the adsorption layer 2222 of electrode 222 can be made of activated carbon and other adsorption materials to achieve adsorption of ions in raw water.

[0071] Meanwhile, the insulating sheet 221 can be made of plastic. The insulating sheet 221 is used to support the positive electrode and the negative electrode, not only preventing short circuit connection between the positive electrode and the negative electrode, but also ensuring that a water passage 2201 is formed between the positive electrode and the negative electrode.

[0072] In practical applications, the operation of the capacitive deionization filter element 20 includes an adsorption purification process and a desorption regeneration process. When the adjacent two electrode plates 222 are electrically connected to the positive and negative poles of the power supply and the power supply is turned on, the anions and cations in the raw water are attracted to the electrode plates 222 with opposite charges and adsorbed by the adsorption layer 2222 on the electrode plates 222. This working process of the core is the adsorption purification process.

[0073] Correspondingly, when the power supply is stopped, or when a reverse voltage is applied to the two adjacent electrode plates 222, the ions adsorbed by the adsorption layer 2222 are released into the water in the water passage 2201. At this time, the water passage 2201 will output concentrated water with a high ion concentration.

[0074] As can be seen from the above, the capacitive deion filter element 20 shown in this embodiment achieves the integrated design of the electrode sheet 222 by setting the adsorption layer 2222 on the front and back sides of the current collector layer 2221. The electrode assembly 22 can be formed by stacking the electrode sheet 222 and the insulating sheet 221 in an alternating arrangement. This stacked arrangement design of the electrode assembly 22 simplifies the arrangement structure of the electrode assembly 22, facilitates processing and production, and helps to reduce production costs.

[0075] Meanwhile, in practical applications, simply connecting two adjacent electrode layers 222 to the positive and negative poles of the power supply allows for the adsorption of ions in the raw water passing through the water channel 2201, achieving the purpose of purifying the raw water. Since both sides of the current collector layer 2221 of each electrode layer 222 are equipped with adsorption layers 2222, both sides of each electrode layer 222 can adsorb ions, thus ensuring the purification effect of the raw water to a certain extent. The core can effectively remove heavy metal ions from the water while retaining beneficial ions needed by the human body, meeting the needs of household water purification.

[0076] In some embodiments, in order to ensure the purification effect on the raw water, two adjacent electrode sheets 222 are arranged opposite each other along the stacking direction to ensure the coverage of the electric field between the two adjacent electrode sheets 222 as much as possible, and then remove anions, cations and other charged particles in the raw water based on the electric field between the two adjacent electrode sheets 222.

[0077] Furthermore, by staggering the insulating sheet 221 and the electrode sheet 222 along the stacking direction, the electrode sheet 222 is hidden between two adjacent insulating sheets 221. This design ensures electrical isolation between two adjacent electrode sheets 222, and also facilitates positioning the water outlet end of the electrode assembly 22 opposite to the first water passage hole 211 on the peripheral wall of the water outlet pipe 21, ensuring that the water passage channel 2201 inside the electrode assembly 22 and the water passage gap 201 inside the water outlet pipe 21 remain unobstructed.

[0078] Among them, such as Figure 12 As shown, the stacking direction is along the thickness direction of the insulating sheet 221 or the electrode sheet 222.

[0079] In some embodiments, such as Figure 6 and Figure 8 As shown, the peripheral wall of the water outlet pipe 21 is provided with multiple sets of first water passage holes 211 along the circumferential direction, and each set of first water passage holes 211 is arranged along the axial direction of the water outlet pipe 21.

[0080] The number of electrode sheets 222 is greater than two layers, so that the electrode assembly 22 forms multiple water passages 2201; the inner end of the electrode assembly 22 forms multiple water outlets corresponding to the multiple water passages 2201, and the multiple water outlets are arranged opposite to multiple sets of first water passage holes 211.

[0081] Understandably, by setting the number of electrode sheets 222 to be greater than two layers, multiple water passages 2201 formed by the electrode assembly 22 can be used to purify the raw water flowing through multiple channels in the core at the same time, thereby improving the purification efficiency of the raw water.

[0082] At the same time, by setting multiple water outlets and multiple sets of first water passage holes 211 opposite to each other, the smoothness of the water passage between each water passage 2201 and the water passage gap 201 inside the water outlet pipe 21 can be ensured, which in turn helps to ensure the clean water output flow of the core.

[0083] In practical applications, while ensuring electrical isolation between two adjacent electrode sheets 222, the insulating sheet 221 and the end of the electrode sheet 222 near the end of the electrode assembly 22 close to the water outlet pipe 21 can be staggered in sequence and arranged circumferentially along the extension direction of the electrode sheet 222.

[0084] In some embodiments, such as Figure 3 , Figure 4 and Figure 8 As shown, in order to facilitate the connection of two adjacent electrode plates 222 to the positive and negative terminals of the power supply, the electrode assembly 22 further includes: a positive electrode tab 2223 and a negative electrode tab 2224; the positive electrode tab 2223 is electrically connected to the current collector layer 2221 of the positive electrode plate; the negative electrode tab 2224 is electrically connected to the current collector layer 2221 of the negative electrode plate.

[0085] Specifically, each positive electrode has a first extension on one side of its current collector layer 2221, and each negative electrode has a second extension on one side of its current collector layer 2221. When the electrode assembly 22 is wound around the peripheral wall of the water outlet pipe 21, the first extensions of each positive electrode are stacked to form a positive electrode tab 2223, and the second extensions of each negative electrode are stacked to form a negative electrode tab 2224.

[0086] In some embodiments, the current collector layer 2221 comprises any one of copper foil, titanium foil, and graphite paper, and the current collector layer 2221 is configured to be electrically connected to the positive or negative terminal of the power supply.

[0087] The adsorption layer 2222 is attached to the surface of the current collector layer 2221. The adsorption layer 2222 includes an activated carbon layer, which has excellent adsorption performance and can adsorb ions in the raw water.

[0088] In some embodiments, since the thickness of the current collector layer 2221 of the electrode sheet 222 determines the support strength, winding difficulty and cost of the electrode sheet 222, if the current collector layer 2221 is too thin, the current collector layer 2221 is easily damaged, and if the current collector layer 2221 is too thick, the cost of the electrode sheet 222 is too high. Therefore, the thickness of the current collector layer 2221 is set to 15-50 micrometers. Optionally, the thickness of the current collector layer 2221 is specifically 25 micrometers, 30 micrometers, 35 micrometers, 40 micrometers, 45 micrometers, 50 micrometers, etc.

[0089] Meanwhile, since the thickness of the adsorption layer 2222 of the electrode sheet 222 determines the adsorption capacity and adsorption rate, but if the adsorption layer 2222 is too thick, the adsorption layer 2222 will crack during winding. Therefore, the thickness of the adsorption layer 2222 is set to 25-200 micrometers; optionally, the thickness of the adsorption layer 2222 is specifically 25 micrometers, 30 micrometers, 50 micrometers, 65 micrometers, 100 micrometers, 150 micrometers, 185 micrometers, 200 micrometers, etc.

[0090] In some embodiments, the insulating sheet 221 may be configured as a porous structure, for example, the insulating sheet 221 may include an insulating fabric or an insulating mesh. The insulating fabric may be a woven fabric or a meltblown fabric.

[0091] Thus, although the insulating sheet 221 is disposed in the water passage 2201, because the insulating sheet 221 has a porous structure, the insulating sheet 221 will not affect the migration of ions between two adjacent electrode sheets 222, thereby not affecting the adsorption of ions in the water by the adsorption layer 2222 of the electrode sheet 222. The insulating sheet 221 will ensure the uniform flow of water in the water passage 2201, which can ensure the adsorption effect of the adsorption layer 2222 on ions to a certain extent.

[0092] In some embodiments, considering that the greater the thickness of the insulating sheet 221, the smaller the water pressure loss and the lower the risk of clogging, but the greater the thickness of the insulating sheet 221, the larger the distance between two adjacent electrode sheets 222, and thus the greater the resistance between two adjacent electrode sheets 222, resulting in poorer water purification performance, the thickness of the insulating sheet 221 is set to 0.1-1.0 mm in order to comprehensively consider pressure loss and water purification effect; optionally, the thickness of the insulating sheet 221 is specifically set to 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.

[0093] In some embodiments, the adsorption layer 2222 includes activated carbon, titanium dioxide, a conductive agent, and a binder, wherein the mass ratio of activated carbon to titanium dioxide is (5~1):1.

[0094] For electrode 222, the current collector layer 2221 of electrode 222 can be made of metal or graphite material so that the current collector layer 2221 forms a conductive layer, and the adsorption layer 2222 of electrode 222 can be made of activated carbon and other adsorption materials to achieve adsorption of ions in raw water.

[0095] Meanwhile, the insulating sheet 221 can be made of plastic. The insulating sheet 221 is used to support the positive electrode and the negative electrode, not only preventing short circuit connection between the positive electrode and the negative electrode, but also ensuring that a water passage 2201 is formed between the positive electrode and the negative electrode.

[0096] Furthermore, by setting the adsorption layer 2222 to include activated carbon, titanium dioxide, a conductive agent, and a binder, and configuring the mass ratio of activated carbon to titanium dioxide to be (5~1):1, the excellent adsorption performance of activated carbon can be utilized to adsorb ions in the raw water. Titanium dioxide has many functional groups (carboxyl groups, hydroxyl groups, etc.) on its surface, which can undergo complexation reactions with heavy metal ions, thus removing heavy metals from the water through surface complexation. Specifically, in activated carbon, heavy metal removal is mainly achieved through pore size adsorption, while the surface of titanium dioxide has many functional groups (carboxyl groups, hydroxyl groups, etc.) that can undergo complexation reactions with heavy metal ions, removing heavy metals from the water through surface complexation. The combined effect of complexation and adsorption achieves the removal effect. However, titanium dioxide cannot remove other beneficial ions in the raw water; they can only be removed through the double electric layer of activated carbon and adsorption. Therefore, the retention of beneficial ions can be achieved through the regulation of the electric field. The inventors discovered that controlling the mass ratio of activated carbon to titanium dioxide to be (5~1):1, this design can not only effectively remove heavy metals from the water but also retain beneficial ions, achieving the purpose of water purification. For example, the mass ratio of activated carbon to titanium dioxide can be 5:1, 4.5:1, 4:1, 3.5:1, 3:1, 2.5:1, 2:1, 1.5:1, 1:1, etc. Therefore, by adding titanium dioxide to the electrode material and controlling the mass ratio of activated carbon to titanium dioxide within the above ranges, this application can effectively remove heavy metal ions from water while retaining beneficial ions needed by the human body, thus meeting the needs of household water purification.

[0097] It should be noted that both the current collector layer 2221 and the conductive agent are made of conventional materials in the art, and those skilled in the art can select them according to actual needs. For example, the current collector layer 2221 includes, but is not limited to, copper foil, aluminum foil, stainless steel foil, titanium foil, nickel foil, etc. The conductive agent includes, but is not limited to, acetylene black, conductive carbon black, graphite powder, etc. The binder includes, but is not limited to, polyurethane, polyvinylidene fluoride, polystyrene, polyacrylate, polytetrafluoroethylene, etc.

[0098] In some embodiments, heavy metals include, but are not limited to, Pb, As, Fe, Cr, and Cu.

[0099] In some embodiments, the particle size of the activated carbon can be 5 μm to 15 μm, and the specific surface area of ​​the activated carbon is 1500 m². 2 / g~2200 m 2 / g, the average pore size of activated carbon is 1nm~5nm. For example, the particle size of activated carbon is 5μm, 7μm, 9μm, 11μm, 13μm, 15μm, etc., and the specific surface area of ​​activated carbon is 1500m². 2 / g, 1600m 2 / g, 1700 m 2 / g, 1800 m2 / g, 1900 m 2 / g, 2000m 2 / g, 2100 m 2 / g, 2200 m 2 The activated carbon has an average pore size of 1 nm, 2 nm, 3 nm, 4 nm, and 5 nm, etc. The inventors discovered that by controlling the particle size, specific surface area, and average pore size of the activated carbon within the above ranges, the activated carbon can provide more active sites and has a larger adsorption capacity, thus exhibiting excellent ion adsorption performance and heavy metal removal ability. Furthermore, activated carbon can better synergize with titanium dioxide to remove heavy metal ions while retaining a certain amount of beneficial ions.

[0100] In some embodiments, the titanium dioxide particle size is 0.25 mm to 1.5 mm, and the surface area of ​​the titanium dioxide is 200 m². 2 / g ~240 m 2 / g, the average pore size of titanium dioxide is 6nm~9nm. For example, the particle size of titanium dioxide is 0.25mm, 0.5mm, 0.7mm, 0.9mm, 1.3mm, 1.5mm, etc., and the surface area of ​​titanium dioxide is 200 m². 2 / g, 210 m 2 / g, 220 m 2 / g, 230 m 2 / g, 240m 2 The average pore size of titanium dioxide is 6 nm, 7 nm, 8 nm, 9 nm, etc. The inventors discovered that controlling the particle size, surface area, and average pore size of titanium dioxide within the above range provides better active functional groups and superior ion complexing ability, thereby improving the removal rate of heavy metals. Furthermore, it better synergizes with activated carbon, retaining a certain amount of beneficial ions needed by the human body while removing heavy metals.

[0101] In some embodiments, the conductive agent accounts for 2% to 5% of the total mass of the adsorption layer 2222. For example, the mass percentage can be 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc. This improves the conductivity and electron transport capability of the electrode sheet 222.

[0102] In some embodiments, the binder accounts for 5% to 10% of the total mass of the adsorption layer 2222. For example, the mass percentage can be 5%, 6%, 7%, 8%, 9%, 10%, etc. This improves the contact performance of the various materials in the adsorption layer 2222.

[0103] In some embodiments, the binder comprises a cellulose-based binder grafted with active groups, wherein the cellulose-based binder is sodium carboxymethyl cellulose and / or carboxymethyl cellulose, and the active groups include at least one of sulfonic acid groups, carboxyl groups, and amino groups. Cellulose-based binders have a large number of hydroxyl groups. On the one hand, during cyclic electrolysis, -CH2-OH is easily oxidized to form carboxyl groups. The presence of carboxyl groups in the negative electrode material is beneficial for enhancing the adsorption capacity for cations, inhibiting the adsorption of anions, reducing common ion repulsion, and increasing the adsorption capacity. On the other hand, cellulose-based binders are easily grafted with sulfonic acid groups, amino groups, etc. The grafted binder exhibits anion and cation selectivity, reducing the decrease in adsorption capacity caused by common ion repulsion and significantly increasing the ion adsorption capacity. Therefore, this capacitive deionization filter element 20 has excellent ion adsorption performance and a high ion removal rate.

[0104] Furthermore, for the positive electrode, the active group includes an amino group; for the negative electrode, the active group includes at least one of a sulfonic acid group and a carboxyl group.

[0105] Furthermore, based on the total mass of the adsorption layer 2222, the mass percentage of the cellulose-based binder is not less than 1%. For example, the mass percentage of the cellulose-based binder is not less than 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, etc. By controlling the mass percentage of the cellulose-based binder to be not less than 1%, it can be ensured that the binder has a large number of active groups, thereby ensuring a large ion adsorption capacity and improving the ion adsorption effect and ion removal rate of the electrode.

[0106] Furthermore, the binder also includes at least one of styrene-butadiene rubber, polytetrafluoroethylene, and polyvinylidene fluoride. By adding the above-mentioned type of binder, the stability of the adsorption layer 2222 in water is improved, reducing phenomena such as dissolution, detachment, peeling, and cracking of the activated carbon material layer during operation. According to embodiments of the present invention, based on the total mass of the adsorption layer 2222, the mass percentage of the binder is 2% to 15%, preferably 3% to 7%. For example, the mass percentages are 2%, 5%, 7%, 10%, 12%, 15%, etc. The inventors have found that controlling the mass percentage of the binder within the above range can maintain the bonding performance, provide usable selective groups, and ensure the ratio of active ingredients and conductive agents, thus maintaining the total adsorption capacity. In the adsorption layer 2222, the mass ratio of the binder is very small compared to the activated carbon material. Therefore, compared to the existing modification of activated carbon materials, the binder modification used in this application can not only significantly reduce production costs, but also, in terms of adsorption performance, the performance of the electrode sheet 22212 prepared by the binder modification in this application is no worse than that of the electrode sheet 222 prepared by the activated carbon material modification. Therefore, this invention provides a new approach to improve the adsorption performance of the electrode sheet 22212.

[0107] Furthermore, the activated carbon is grafted with the aforementioned active groups, including at least one of sulfonic acid groups, carboxyl groups, and amino groups. By grafting active groups onto the activated carbon material, the ion adsorption capacity and ion removal rate of the electrode can be further improved.

[0108] In optional embodiments, such as Figure 2 , Figure 3 and Figure 11 As shown, the filter element 2 also includes a first end cap 4, which includes a housing 41 and a sealing plate 42. The housing 41 is located at the first end of the capacitor deionization filter element 20, that is, the end where the second outlet 212 is provided. The housing 41 is provided with a storage space and a first opening and a second opening communicating with the storage space. The post-filter element 24 is located between the top wall 32 of the storage space and the sealing plate 42. A first gap is left between the sealing plate 42 and the bottom wall of the storage space, and a second gap is left between the post-filter element 24 and the side wall 31 of the storage space. The first gap and the second gap are connected. The first outlet 2411 is connected with the first opening, and the second outlet 212 is connected with the second gap through the second opening.

[0109] It should be noted that the housing 41 can be cylindrical, and the post-filter 24 can be cylindrical. The post-filter 24 can be coaxially arranged with the housing 41. The housing 41 has a first side and a second side. The first side is provided with a second opening. The first side is bonded to the end face of the capacitive deionization filter 20, and the second opening is connected to the second outlet 212 of the water outlet pipe 21. The second side is provided with a first opening.

[0110] In addition, the first end of the post-filter 24 is bonded to the top wall 32 of the storage space, and the first outlet 2411 at the first end of the post-filter 24 corresponds to and is connected to the first opening, and the second end of the post-filter 24 is bonded to the sealing plate 42.

[0111] In practical applications, water enters the capacitor deionization filter 20 through the outer side of the filter element 20, and the filter element 20 completes the first purification of the water. The water purified by the filter element 20 flows out through the second outlet 212. After that, the water flows into the second gap through the second opening, and then into the third gap through the second gap. In this way, the water can complete the second purification through the post-filter element 24. The purified water flows out through the first outlet 2411.

[0112] like Figure 2 , Figure 3 as well as Figure 11As shown, in order to facilitate the installation of the post-filter 24 inside the housing 41 and the bonding of the post-filter 24 to the sealing plate 42, the housing 41 includes a sealed housing body and a cover. The housing body and the cover enclose the storage space. The cover is bonded to the first end of the capacitor deionization filter 20. The cover is provided with a second opening, and the housing body is provided with a first opening.

[0113] In other words, the installation of the post-filter 24 to the housing body can be completed first. After the post-filter 24 is installed to the housing body, the post-filter 24 can be glued to the sealing plate 42. Finally, the connection between the housing body and the cover, as well as the connection between the capacitor deionization filter 20 and the cover, can be completed.

[0114] It should be noted that the cover includes a bent sealing part and a connecting part. The sealing part is glued to the second end of the capacitor deionization filter element 20, and the inner side of the connecting part is sealed to the outer side of the box body. In other words, the second opening is located in the sealing part.

[0115] like Figure 2 and Figure 3 As shown, the post-filter element 24 is provided with a second water outlet channel 241, which forms a first water outlet 2411. Inside the housing 41, near the first opening, a first annular support portion 411 is formed, with its outer side abutting against the inner wall of the second water outlet channel 241. A second annular support portion 421 is formed on the side of the sealing plate 42 facing the post-filter element 24, with its outer side abutting against the inner wall of the second water outlet channel 241.

[0116] The post-filter element 24 can be cylindrical, and a second water outlet channel 241 is provided at the central axis of the post-filter element 24. The first annular support part 411 and the second annular support part 421 limit the post-filter element 24, which can ensure the coaxiality of the post-filter element 24 with the housing 41.

[0117] It is understood that the cover also includes a second baffle wall 412 that is bent and connected to the sealing part. The bending direction of the second baffle wall 412 is opposite to the bending direction of the connecting part, and the second baffle wall 412 is connected to the outer side of the capacitor deion filter element 20.

[0118] It should be noted that a third annular support portion 413 is formed on the outside of the housing 41 near the second opening. The third annular support portion 413 extends into the interior of the water outlet pipe 21, and the outer side of the third annular support portion 413 is sealed to the inner wall of the water outlet pipe 21.

[0119] like Figure 1 , Figure 2 and Figure 3As shown, the water purification assembly also includes a first housing 11 and a second housing 12 connected to each other. The first housing 11 is provided with a first insertion hole 103 and a second insertion hole 104. The electrode assembly 22 has a positive electrode tab 2223 and a negative electrode tab 2224. The positive electrode tab 2223 and the negative electrode tab 2224 are located inside the first housing 11. At least a portion of the positive electrode tab 2223 is exposed outside the first insertion hole 103, and at least a portion of the negative electrode tab 2224 is exposed outside the second insertion hole 104. The outer side of the filter element 2 is sealed to the inner wall of the second housing 12, and a third gap is left between the outer side of the filter element 2 and the inner wall of the second housing 12. The second housing 12 is provided with a water outlet port 102 and a water inlet port 101 communicating with the third gap. The first water outlet 2411 is connected to the water outlet port 102.

[0120] Understandably, the housing 1 is cylindrical, and a receiving cavity is provided inside the housing 1. The filter element 2 is installed in the receiving cavity and is configured to be coaxial with the housing 1.

[0121] The second end of the capacitive deionization filter element 20 has a positive electrode tab 2223 and a negative electrode tab 2224. The positive electrode tab 2223 and the negative electrode tab 2224 are located inside the first housing 11. At least part of the positive electrode tab 2223 is exposed through the first insertion hole 103, and at least part of the negative electrode tab 2224 is exposed through the second insertion hole 104. The outer side of the capacitive deionization filter element 20 is sealed to the inner wall of the second housing 12. A fourth gap is left between the outer side of the capacitive deionization filter element 20 and the inner wall of the second housing 12 at its second end. The second housing 12 is provided with a water outlet port 102 and a water inlet port 101 communicating with the fourth gap. The water outlet located at the second end of the filter element 2 is connected to the water outlet port 102.

[0122] It should be noted that the first housing 11 has a first insertion hole 103 and a second insertion hole 104, and the second housing 12 has a water inlet port 101 and a water outlet port 102. That is, the first insertion hole 103 and the second insertion hole 104 are located on one side of the housing 1, and the water inlet port 101 and the water outlet port 102 are located on the other side of the housing 1.

[0123] Furthermore, the outer surface of the capacitive deionization filter element 20 is sealed to the inner wall of the second housing 12 near its second end. This ensures that the first insertion hole 103 and the second insertion hole 104 are isolated from the water inlet port 101 and the water outlet port 102, and that water entering the second housing 12 through the water inlet port 101 cannot enter the first housing 11.

[0124] When assembling the filter element 2 into the housing 1, firstly, the second housing 12 of the filter element 2 is assembled so that the first outlet 2411 at the second end of the filter element 2 is connected to the outlet port 102 of the second housing 12. Then, the first housing 11 and the second housing 12 are joined together so that at least a portion of the positive electrode tab 2223 at the first end of the filter element 2 is exposed in the first insertion hole 103, and at least a portion of the negative electrode tab 2224 is exposed in the second insertion hole 104. After the positive electrode tab 2223 is joined to the first insertion hole 103 and the negative electrode tab 2224 is joined to the second insertion hole 104, the connection between the first housing 11 and the second housing 12 is completed. Thus, by setting the housing 1 as the first housing 11 and the second housing 12, the alignment accuracy of the positive electrode tab 2223 with the first insertion hole 103 and the alignment accuracy of the negative electrode tab 2224 with the second insertion hole 104 can be ensured.

[0125] like Figure 2 , Figure 3 , Figure 9 Figure 11 As shown, the filter element 2 also includes a second end cap 3, which includes a side wall 31 and a top wall 32 connected to each other. The side wall 31 is connected to the inner wall of the first housing 11, and the top wall 32 is sealed to the second end of the capacitor deion filter element 20 by a filler adhesive. The top wall 32, the side wall 31 and the inner wall of the first housing 11 enclose and form an accommodating space 112. The top wall 32 is provided with a first through hole 322 for the positive electrode tab 2223 to pass through and a second through hole for the negative electrode tab 2224 to pass through.

[0126] Understandably, the top wall 32 is disc-shaped, and the side wall 31 extends circumferentially relative to the central axis of the filter element 2. The side wall 31 is located on the side of the top wall 32 away from the capacitor deion filter element 20 and abuts against the inner wall of the first end of the first housing 11, so that the top wall 32, the side wall 31 and the inner wall of the first housing 11 enclose and form an accommodating space 112.

[0127] like Figure 2 , Figure 3 and Figure 9 As shown, the second end cap 3 also includes: a first baffle wall 33 that is bent and connected to the top wall 32. The outer side of the first baffle wall 33 is sealed to the inner wall of the second housing 12. The top wall 32 and the first end of the filter element 2 are sealed to each other by a filler adhesive. The inner side of the first baffle wall 33 is attached to the outer side of the filter element 2.

[0128] Understandably, the filler adhesive forms a sealant layer at the second end of the capacitive deionization filter element 20, and the top wall 32 adheres to the surface of the sealant layer to achieve a seal at the first end of the filter element 2.

[0129] The first baffle wall 33 is located on the outer edge of the top wall 32 and extends circumferentially relative to the center of the top wall 32. The inner diameter of the first baffle wall 33 is adapted to the diameter of the filter element 2. The first baffle wall 33 is used to prevent the filling adhesive from overflowing to the peripheral wall of the filter element 2.

[0130] A first support rib may be provided on one side of the top wall 32 facing the capacitor deionization filter element 20. The first support rib may be configured to extend radially along the capacitor deionization filter element 20. The first support rib is used to ensure the thickness of the filler adhesive at the first end of the capacitor deionization filter element 20 and to help ensure the molding quality of the filler adhesive.

[0131] By sealing the outer side of the first baffle wall 33 with the inner wall of the second housing 12, water can be prevented from entering the accommodating space 112 formed between the top wall 32, the side wall 31 and the inner wall of the first housing 11.

[0132] In some embodiments, such as Figure 2 As shown, in order to ensure the molding quality of the filler adhesive, the first end cap 4 also includes a baffle plate 321. The baffle plate 321 is disposed on the side of the top wall 32 facing the first end of the capacitor deion filter element 20 and is disposed close to the outer side surface of the capacitor deion filter element 20.

[0133] In other words, the annular baffle plate 321 is disposed on the inner side of the top wall 32. The annular baffle plate 321 is coaxially disposed with the first baffle wall 33, and the baffle plate 321 and the first baffle wall 33 are spaced apart. The baffle plate 321 is used to restrict the flow of the filling adhesive toward the area where the through hole is located.

[0134] In some embodiments, such as Figure 9 As shown, the projected area of ​​the first through hole 322 on the second end of the capacitor deion filter element 20 is greater than the projected area of ​​the positive electrode tab 2223 on the second end of the capacitor deion filter element 20, and the projected area of ​​the second through hole on the second end of the capacitor deion filter element 20 is greater than the projected area of ​​the negative electrode tab 2224 on the second end of the capacitor deion filter element 20.

[0135] This facilitates sealing of the positive electrode tab 2223 and the negative electrode tab 2224 at the second end of the capacitor deion filter element 20. In other words, after sealing the area between the baffle plate 321 and the first baffle wall 33 at the second end of the capacitor deion filter element 20, the remaining area (the area enclosed by the baffle plate 321) at the second end of the capacitor deion filter element 20 is sealed through the first through hole 322 and the second through hole.

[0136] In optional embodiments, such as Figure 2 , Figure 3 , Figure 9 and Figure 10As shown, the filter element 2 also includes a fixing base 6, and the capacitor deionization filter element 20 also includes a power connection component 5. The power connection component 5 includes a positive electrode electrical connector 51 and a negative electrode electrical connector 52. The fixing base 6 is detachably mounted on the side wall 31. The fixing base 6 is provided with a first positioning hole 62 corresponding to the positive electrode tab 2223 and a second positioning hole corresponding to the negative electrode tab 2224. The positive electrode electrical connector 51 is inserted into the first positioning hole 62 and is detachably connected to the positive electrode tab 2223. The negative electrode electrical connector 52 is inserted into the second positioning hole and is detachably connected to the negative electrode tab 2224.

[0137] The electrical connection assembly 5 includes a positive electrical connector 51 and a negative electrical connector 52. The positive electrical connector 51 is electrically connected to the positive electrode tab 2223 and can pass through the first positioning hole 62. The negative electrical connector 52 is electrically connected to the negative electrode tab 2224 and can pass through the second positioning hole. Thus, the coaxiality of the positive electrical connector 51 and the negative electrical connector 52 can be ensured through the first positioning hole 62 and the second positioning hole.

[0138] To improve the installation stability of the fixing seat 6 and the first end cover 4, the fixing seat 6 is provided with a slot 61 on the side facing the top wall 32, and a buckle 311 is provided on the inner side of the side wall 31. The fixing seat 6 and the first end cover 4 are engaged in the circumferential direction through the slot 61 and the buckle 311.

[0139] In some embodiments, such as Figure 10 As shown, each of the first positioning hole 62 and the second positioning hole is a stepped hole. The stepped hole has a stepped surface, and the outer side of each electrical connector has an abutting surface that abuts against the stepped surface.

[0140] In other words, the fixing seat 6 ensures the coaxiality of the electrical connector and the electrode, and ensures that the electrical connector will not move excessively during the connection process, so as to avoid squeezing damage to the electrode.

[0141] In some embodiments, such as Figure 3 As shown, each of the positive electrode connector 51 and the negative electrode connector 52 is provided with a slot, and the corresponding tab is inserted into the slot. For example, the bottom of the positive electrode connector 51 is provided with a slot, and the positive electrode tab 2223 can be inserted into the slot of the positive electrode connector 51. In this way, the fast and stable connection between the electrical connector and the tab can be ensured.

[0142] The electrical connector has a conductive surface and a connecting surface, which are arranged opposite to each other. The conductive surface is used to connect to an external power source, and the connecting surface is used to connect to a tab. The conductive surface of each electrical connector is flush with the side of the fixing base 6 that is away from the top wall 32.

[0143] To ensure accurate connection between the external power supply and the positive and negative electrical connectors 51 and 52, the positive and negative electrical connectors 51 and 52 are located inside the housing 1. The projected area of ​​the first insertion hole 103 on the bottom wall is less than or equal to the projected area of ​​the conductive surface of the positive electrical connector 51 on the bottom wall, and the projected area of ​​the second insertion hole 104 on the bottom wall is less than or equal to the projected area of ​​the conductive surface of the negative electrical connector 52 on the bottom wall. In other words, the positive electrical connector 51 does not extend into the first insertion hole 103, and the negative electrical connector 52 does not extend into the first insertion hole 103. External positive power supply terminals can enter the first insertion hole 103 to connect with the positive electrical connector 51, and external negative power supply terminals can enter the second insertion hole 104 to connect with the negative electrical connector 52.

[0144] In practical applications, a layer of filler adhesive is first applied to a first region at the first end of the filter element 2. This first region is the area between the first adhesive-blocking wall 33 and the adhesive-blocking plate 321. Then, the first end cap 4 is placed on the first end of the filter element 2. Since the first adhesive-blocking wall 33 is in contact with the peripheral wall of the capacitive deion filter element 20 and extends circumferentially relative to the water outlet port 102, the first adhesive-blocking wall 33 not only prevents the filler adhesive from overflowing to the side of the filter element 2, but also limits the filter element 2 radially, ensuring the coaxiality of the filter element 2 and the water outlet port 102. Next, a layer of filler adhesive is applied to a second region at the first end of the filter element 2. This second region is the area enclosed by the adhesive-blocking plate 321, thus completing the sealing of the first end of the filter element 2. Subsequently, the fixing base 6 is installed on the side wall 31. With the limiting cooperation of the slot 61 and the buckle 311, the first positioning hole 62 can correspond to the positive electrode tab 2223, and the second positioning hole can correspond to the negative electrode tab 2224. Then, the positive electrode electrical connector 51 is installed in the first positioning hole 62 and completes the insertion cooperation with the positive electrode tab 2223. The negative electrode electrical connector 52 is installed in the second positioning hole and completes the insertion cooperation with the negative electrode tab 2224. That is to say, under the action of the fixing base 6, the coaxiality of the electrical connector and the tab can be ensured, and the electrical connector will not move excessively during the docking process to avoid damage to the tab.

[0145] like Figure 2 , Figure 3 and Figure 11 As shown, the inner wall of the second housing 12 is provided with a partition 121. The partition 121 and the end of the post-filter 24 where the first water outlet 2411 is located enclose each other to form a water outlet space 111. The first water outlet 2411 is connected to the water outlet port 102 through the water outlet space 111.

[0146] An annular flow guide 414 is provided on the outer side of the housing 41 at the first opening. An annular baffle 121 is fitted onto the outer side of the annular flow guide 414. The annular baffle 121 and the annular flow guide 414 enclose and form a water outlet space 111.

[0147] It should be noted that the outer side of the annular guide section 414 and the inner side of the annular partition 121 are directly sealed together. For example, multiple sealing rings are provided on the outer side of the annular guide section 414 along its axial direction, so as to prevent the water flowing out from the first opening from entering the interior of the housing 1 through the water outlet space 111.

[0148] It is particularly important to note that a fifth gap is left directly between the outer side of the housing 41 and the inner wall of the second housing 12. In this way, the water inlet port 101 can be connected to the first gap through the fifth gap, and the water can reach the outer side of the capacitor deion filter element 20.

[0149] Considering that the existing outlet pipe 21 typically has multiple water passage holes densely distributed on its peripheral wall, the water output from the inner side of the electrode assembly 22 will uniformly pass through each water passage hole into the outlet channel. If air bubbles appear in the electrode assembly 22, the bubbles may adhere to the surface of the positive and / or negative electrode plates, and the flowing water will not have an effect on the desorption of the bubbles. However, by setting the water passage holes on the peripheral wall near the second end of the outlet pipe 21, making the water passage holes far away from the outlet, this design can limit the water output from the inner side of the electrode assembly 22 to gradually converge towards the area where the water passage holes are located, and then sequentially pass through the water passage holes, the outlet channel, and the outlet. During the water flow, because the water passage holes are far away from the outlet, the flowing water will gradually converge towards the area where the water passage holes are located. This will gradually squeeze the air bubbles generated in the electrode assembly 22 to the area where the water passage holes are located, and then enter the outlet channel from the water passage holes and be discharged with the water, thereby effectively removing the air bubbles appearing in the capacitor deion filter 20.

[0150] As can be seen from the above, the water purification component shown in this invention can effectively remove the air bubbles generated inside the filter element during the desalination process of the capacitor deion filter element 20, which can prevent the capacitor deion filter element 20 from generating noise during operation, ensure the stability of the internal electric field of the electrode assembly 22, and thus also ensure the water purification effect of the capacitor deion filter element 20.

[0151] It should be noted that the capacitive deionization filter element 20 also includes a protective sleeve, such as a cylindrical membrane. The protective sleeve is fitted onto the peripheral wall of the electrode assembly 22 and has multiple water inlets to ensure that water can reach the outside of the electrode assembly 22 through the water inlets, and then the electrode assembly 22 will desalinate the received water.

[0152] Furthermore, such as Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the filter element 2 of this embodiment includes a water outlet pipe 21, a guide pipe 23 and an electrode assembly 22. The electrode assembly 22 is wound around the peripheral wall of the water outlet pipe 21. The two ends of the electrode assembly 22 along the axial direction of the water outlet pipe 21 are sealed. The outer side of the electrode assembly 22 is used to receive the input of raw water, and the inner side of the electrode assembly 22 is used to output purified water or wastewater.

[0153] The peripheral wall of the water outlet pipe 21 is provided with a first water passage hole 211, the first end of the water outlet pipe 21 forms a water outlet, and the second end of the water outlet pipe 21 is closed; the guide pipe 23 is inserted into the water outlet pipe 21 to form a water passage gap 201 between the guide pipe 23 and the water outlet pipe 21; the peripheral wall of the first end of the guide pipe 23 is sealed to the inner wall of the water outlet pipe 21, and a second water passage hole 202 is formed between the second end of the guide pipe 23 and the second end of the water outlet pipe 21;

[0154] The first water passage 211, the water passage gap 201, the second water passage 202, the inner cavity of the guide pipe 23 and the water outlet are connected in sequence to form a fluid connection. The outer diameter of the guide pipe 23 is smaller than the inner diameter of the water outlet pipe 21, so as to form a water passage gap 201 between the guide pipe 23 and the water outlet pipe 21.

[0155] Understandably, the electrode assembly 22 typically includes stacked positive and negative electrode plates, which are isolated from each other, and a flow channel for water supply is formed between the positive and negative electrode plates. When the electrode assembly 22 is wound, the inner side of one end of the electrode assembly 22 contacts the peripheral wall of the water outlet pipe 21, and then the electrode assembly 22 is wound layer by layer with the water outlet pipe 21 as the central axis until the electrode assembly 22 is wound into a columnar distribution.

[0156] Since the electrode assembly 22 is wound around the peripheral wall of the outlet pipe 21 and both ends of the electrode assembly 22 are sealed along the axial direction of the outlet pipe 21, when a positive voltage is applied to the positive and negative electrodes, cations, anions, or charged particles in the water will migrate to the surface of the positive and negative electrodes under the action of the electric field force, so that the inner side of the electrode assembly 22 outputs desalinated water; when a reverse voltage is applied to the positive and negative electrodes, or when the voltage is stopped, the anions, cations, or charged particles adsorbed on the surface of the positive and negative electrodes will automatically detach, so that the inner side of the electrode assembly 22 outputs wastewater with a higher concentration.

[0157] Considering that the peripheral wall of the existing water outlet pipe 21 is usually densely covered with multiple water passage holes, the water output from the inner side of the electrode assembly 22 will evenly pass through each water passage hole into the water outlet channel. If air bubbles appear in the electrode assembly 22, the air bubbles may adhere to the surface of the positive electrode and / or negative electrode. The flowing water will not have an effect on the desorption of the air bubbles. However, this application, by inserting a guide pipe 23 inside the outlet pipe 21 and setting a second water passage hole 202 between the second end of the guide pipe 23 and the second end of the outlet pipe 21, makes the second water passage hole 202 far away from the outlet. This design can limit the water output from the inner side of the electrode assembly 22 to gradually converge towards the area where the second water passage hole 202 is located after entering the water passage gap 201 from the first water passage hole 211, and then enter the guide pipe 23 through the second water passage hole 202. Finally, it is output from the outlet under the guidance of the guide pipe 23. During the water flow, because the second water passage hole 202 is far away from the outlet, the flowing water gradually converges towards the area where the second water passage hole 202 is located. This will gradually squeeze the air bubbles generated in the electrode assembly 22 to the area where the second water passage hole 202 is located, and then discharge them with the water under the guidance of the guide pipe 23, thereby effectively removing the air bubbles that appear in the core.

[0158] As can be seen from the above, the water purification component shown in this invention can effectively remove the air bubbles generated inside the filter element during the desalination process of the core, which can prevent the core from generating noise during operation, ensure the stability of the internal electric field of the electrode assembly 22, and thus also ensure the water purification effect of the core.

[0159] It should be noted that the filter element 2 also includes a protective sleeve, such as a cylindrical membrane. The protective sleeve is fitted onto the peripheral wall of the electrode assembly 22. The protective sleeve has multiple water inlets to ensure that water can reach the outside of the electrode assembly 22 through the water inlets, and then the electrode assembly 22 will desalinate the received water.

[0160] In some embodiments, such as Figure 6 and Figure 7 As shown, a sealing element 230 is provided inside the water outlet pipe 21, and the sealing element 230 is located near the second end of the water outlet pipe 21; the peripheral wall of the first end of the guide pipe 23 is sealed to the inner wall of the first end of the water outlet pipe 21, and a second water passage hole 202 is formed between the second end of the guide pipe 23 and the sealing element 230.

[0161] Understandably, the axial distance between the sealing element 230 and the second end of the outlet pipe 21 is less than the axial distance between the sealing element 230 and the first end of the outlet pipe 21.

[0162] The length of the guide pipe 23 can be configured such that the axial length between the sealing member 230 and the first end of the outlet pipe 21 is equal. A sealing ring can be used to achieve a sealing connection between the peripheral wall of the first end of the guide pipe 23 and the inner wall of the first end of the outlet pipe 21. The second end of the guide pipe 23 can be configured to abut against the sealing member 230; however, a gap is reserved between the second end of the guide pipe 23 and the sealing member 230 to form the aforementioned second water passage 202.

[0163] Furthermore, such as Figure 7 As shown, the sealing component 230 includes: a sealing plate 2301 and a plurality of protrusions 2302; the sealing plate 2301 is connected to the inner wall of the water outlet pipe 21, for example, the periphery of the sealing plate 2301 is connected to the inner wall of the water outlet pipe 21; the plurality of protrusions 2302 are provided on the side of the sealing plate 2301 facing the water outlet, the plurality of protrusions 2302 are spaced apart circumferentially, the second end of the guide pipe 23 abuts against at least a portion of the plurality of protrusions 2302, and a second water passage hole 202 is formed between two adjacent protrusions 2302.

[0164] Understandably, since multiple protrusions 2302 are spaced apart circumferentially, multiple second water passage holes 202 are provided. The multiple second water passage holes 202 are limited to being arranged circumferentially, and each second water passage hole 202 can realize fluid communication between the water passage gap 201 and the inner cavity of the guide pipe 23.

[0165] In some embodiments, in order to ensure the venting effect on the core, the axial distance between the sealing member 230 and the second end of the water outlet pipe 21 is set to be no more than 15% of the length of the water outlet pipe 21.

[0166] It is understandable that, since a second water passage hole 202 is formed between the second end of the guide pipe 23 and the sealing member 230, the axial length between the second water passage hole 202 and the water outlet is no more than 15% of the length of the water outlet pipe 21.

[0167] Optionally, the length of the core is approximately 333-350mm, and the axial distance between the sealing component 230 and the second end of the outlet pipe 21 can be set to be less than 50mm, so that the second water passage 202 is as far away from the outlet of the core as possible, thereby ensuring the air venting effect.

[0168] In some embodiments, multiple second water passage holes 202 are provided, and the sum of the water passage areas of the multiple second water passage holes 202 is not less than 20mm. 2 For example, the sum of the water passage areas of multiple second water passage holes 202 is 20 mm. 2 25 mm 2 35 mm 2 and 50 mm 2This design avoids significant flow resistance when water passes through the second water passage 202, preventing the second water passage 202 from restricting the flow of water.

[0169] In a second aspect, embodiments of the present invention also provide a water purification device, comprising: a body and a water purification component as described above; the body has an installation cavity, and the water purification component is detachably disposed in the installation cavity.

[0170] Specifically, the water purification equipment can be an instant hot water dispenser, and the body can be provided with an installation port that communicates with the installation cavity. The capacitive deionization filter element 20 can be inserted into the installation cavity through the installation port.

[0171] Since the water purification equipment includes a water purification component, and the specific structure of the water purification component is as described in the above embodiments, the water purification equipment in this embodiment includes all the technical solutions of the above embodiments. Therefore, it has at least all the beneficial effects achieved by all the technical solutions of the above embodiments, which will not be described in detail here.

[0172] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water purification component, characterized in that, include: The filter element (2) includes a capacitor deionization filter element (20) and a post-filter element (24), which are coaxially arranged. The capacitor deionization filter element (20) includes a water outlet pipe (21) and an electrode assembly (22). The electrode assembly (22) is wound around the peripheral wall of the water outlet pipe (21). The post-filter element (24) has a first water outlet (2411). The water outlet pipe (21) has a first water outlet channel and a first water passage hole (211) and a second water outlet (212) communicating with the first water outlet channel. The first water passage hole (211) is located on the peripheral wall of the water outlet pipe (21). Water can pass through the electrode assembly (22), the second water outlet (212) and the outer surface of the post-filter element (24) in sequence, and then be discharged from the first water outlet (2411). The water purification assembly further includes a first housing (11) and a second housing (12) connected to each other. The first housing (11) is provided with a first insertion hole (103) and a second insertion hole (104). The electrode assembly (22) has a positive electrode tab (2223) and a negative electrode tab (2224). The positive electrode tab (2223) and the negative electrode tab (2224) are located inside the first housing (11), and at least part of the positive electrode tab (2223) is exposed outside the first insertion hole. The hole (103) and at least part of the negative electrode tab (2224) are exposed in the second insertion hole (104). The outer side of the filter element (2) is sealed to the inner wall of the second housing (12), and a third gap is left between the outer side of the filter element (2) and the inner wall of the second housing (12). The second housing (12) is provided with a clean water outlet and a raw water inlet communicating with the third gap. The first outlet (2411) is communicating with the clean water outlet. The filter element (2) also includes a first end cap (4), which includes a housing (41) and a sealing plate (42). The housing (41) is located at the first end of the capacitor deionization filter element (20). The housing (41) has a storage space and a first opening and a second opening connected to the storage space. The post-filter element (24) is located between the top wall (32) of the storage space and the sealing plate (42). A first gap is left between the sealing plate (42) and the bottom wall of the storage space. A second gap is left between the post-filter element (24) and the side wall (31) of the storage space. The first gap and the second gap are connected. The first outlet (2411) is connected to the first opening. The second outlet (212) is connected to the second gap through the second opening.

2. The water purification component according to claim 1, characterized in that, The electrode assembly (22) includes: an insulating sheet (221) and at least two layers of electrode sheets (222), wherein the insulating sheet (221) and the electrode sheets (222) are stacked, and the insulating sheet (221) is sandwiched between two adjacent layers of electrode sheets (222); The electrode sheet (222) includes a current collector layer (2221) and an adsorption layer (2222). The adsorption layer (2222) is provided on both the front and back sides of the current collector layer (2221). Two adjacent electrode sheets (222) are respectively configured as a positive electrode sheet and a negative electrode sheet, and a water passage (2201) for accommodating the insulating sheet (221) is formed between the positive electrode sheet and the negative electrode sheet. The electrode assembly (22) is formed as an outlet end and an inlet end relative to the inner and outer ends of the outlet pipe (21); the inlet end is connected to the outlet end through the water passage (2201), and the outlet end extends toward the peripheral wall of the outlet pipe (21) and forms a fluid connection with the first water passage hole (211).

3. The water purification component according to claim 2, characterized in that, The adsorption layer (2222) includes activated carbon, titanium dioxide, a conductive agent and a binder, wherein the mass ratio of activated carbon to titanium dioxide is (5~1):

1.

4. The water purification component according to claim 3, characterized in that, The activated carbon has a particle size of 5-15 μm and a specific surface area of ​​1500-2200 m². 2 / g, wherein the average pore size of the activated carbon is 1-5nm.

5. The water purification component according to claim 3, characterized in that, The titanium dioxide has a particle size of 0.25-1.5 mm and a surface area of ​​200-240 m². 2 / g, the average pore size of the titanium dioxide is 6-9nm.

6. The water purification component according to claim 3, characterized in that, Based on the total mass of the adsorption layer (2222), the mass percentage of the conductive agent is 2% to 5%. And / or, based on the total mass of the adsorption layer (2222), the mass percentage of the adhesive is 5% to 10%.

7. The water purification component according to claim 1, characterized in that, The box (41) includes a sealed box body and a cover, the box body and the cover enclose the storage space, the cover is glued to the first end of the capacitor deion filter (20), the cover is provided with a second opening, and the box body is provided with a first opening.

8. The water purification component according to claim 1, characterized in that, The post-filter (24) is provided with a second water outlet channel (241), the second water outlet channel (241) forms the first water outlet (2411), and the interior of the housing (41) has a first annular support portion (411) near the first opening, the outer side of the first annular support portion (411) abutting against the inner wall of the second water outlet channel (241); and / or, The sealing plate (42) has a second annular support (421) on the side facing the rear filter element (24), and the outer side of the second annular support (421) abuts against the inner wall of the second water outlet channel (241).

9. The water purification component according to claim 1, characterized in that, The filter element (2) further includes a second end cap (3), which includes a side wall (31), a top wall (32), and a sealant wall that are bent and connected in sequence. The side wall (31) is connected to the inner wall of the first housing (11), the top wall (32) is bonded to the second end of the capacitor deion filter element (20), the inner side of the sealant wall is connected to the outer side of the capacitor deion filter element (20), and the outer side of the sealant wall is sealed to the inner wall of the second housing (12). The side wall (31) encloses and forms an installation space, the top wall (32) is provided with a first through hole (322) and a second through hole, the positive electrode tab (2223) passes through the first through hole (322) and extends into the installation space, and the negative electrode tab (2224) passes through the second through hole and extends into the installation space.

10. The water purification component according to claim 9, characterized in that, The filter element (2) also includes a fixing seat (6), which is disposed on the side wall (31) and has a first positioning hole (62) corresponding to the positive electrode tab (2223) and a second positioning hole corresponding to the negative electrode tab (2224); The capacitor deionization filter element (20) further includes a positive electrode connector (51) and a negative electrode connector (52). The positive electrode connector (51) is inserted into the first positioning hole (62) and is detachably connected to the positive electrode tab (2223). The negative electrode connector (52) is inserted into the second positioning hole and is detachably connected to the negative electrode tab (2224).

11. The water purification component according to claim 10, characterized in that, Each of the first positioning hole (62) and the second positioning hole is a stepped hole, and the stepped hole has a stepped surface. The outer side of each of the positive electrode electrical connector (51) and the negative electrode electrical connector (52) is provided with an abutting surface, and the abutting surface abuts against the stepped surface.

12. The water purification component according to claim 10, characterized in that, The fixing seat (6) is detachably disposed on the inner side of the side wall (31). The fixing seat (6) is provided with a slot (61) on the side facing the top wall (32). The inner side of the side wall (31) is provided with a buckle (311). The fixing seat (6) and the second end cap (3) are engaged in the circumferential direction through the slot (61) and the buckle (311).

13. The water purification component according to claim 10, characterized in that, Each of the positive electrode electrical connector (51) and the negative electrode electrical connector (52) has a slot on its connection surface, and the corresponding tab is inserted into the slot.

14. The water purification component according to claim 9, characterized in that, The inner wall of the second housing (12) is provided with a partition (121). The partition (121) and the post-filter (24) form a water outlet space (111) by surrounding one end away from the capacitor deion filter (20). The first water outlet (2411) is connected to the purified water outlet through the water outlet space (111).

15. The water purification component according to any one of claims 1 to 6, characterized in that, The filter element (2) also includes a guide tube (23), the first end of the outlet pipe (21) forms a second outlet (212), the second end of the outlet pipe (21) is closed, the guide tube (23) passes through the outlet pipe (21) to form a water passage gap (201) between the guide tube (23) and the outlet pipe (21); the peripheral wall of the first end of the guide tube (23) is sealed to the inner wall of the outlet pipe (21), and a second water passage hole (202) is formed between the second end of the guide tube (23) and the second end of the outlet pipe (21). The first water passage hole (211), the water passage gap (201), the second water passage hole (202), the inner cavity of the guide pipe (23) and the second water outlet (212) are sequentially connected in a fluid communication.

16. A water purification device, characterized in that, include: The main body and the water purification component as described in any one of claims 1 to 15; The machine body has an installation cavity, and the water purification component is detachably disposed in the installation cavity.

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