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, the filter core includes capacitive deionization filter core and the front filter core of the outer side of capacitive deionization filter core, the capacitive deionization filter core includes water outlet pipe and electrode assembly, the electrode assembly is wound in the peripheral wall of water outlet pipe, the water outlet pipe has water outlet passage and with the first water hole of water outlet passage communication, the water outlet passage is formed with water outlet, and the first water hole is arranged in the peripheral wall of water outlet pipe;Wherein, water can successively pass through the outer side surface of front filter core and electrode assembly, then discharge from water outlet.Such, by integrating front filter core and capacitive deionization filter core to form composite filter core, and this composite filter core occupies small space, simplifies 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 pre-filter and a capacitive deionization 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] The present 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 pre-filter element sleeved on the outside of the capacitive deionization filter element. 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 water outlet pipe has a water outlet channel and a first water passage hole communicating with the water outlet channel. The water outlet channel forms a water outlet. The first water passage hole is located on the peripheral wall of the water outlet pipe. Water can pass sequentially through the outer side of the pre-filter element and the electrode assembly, and then be discharged from the water outlet.

[0007] According to one embodiment of the present invention, the water purification assembly further includes a housing, the filter element is disposed inside the housing, a first end of the filter element forms an accommodating space with the inner wall of the housing, a second end of the filter element forms a water outlet space with the inner wall of the housing, the water outlet space and the accommodating space are disposed opposite to each other, and a first gap is left between the outer side of the filter element and the inner wall of the housing.

[0008] The housing is provided with an outlet port communicating with the outlet space and an inlet port communicating with the first gap. The outlet port and the inlet port are located on the same side of the housing. The outlet port is communicating with the outlet space. The positive and negative conductors electrically connected to the electrode assembly extend into the accommodating space. The positive and negative conductors are spaced apart and adapted to be connected to an external power source.

[0009] According to one embodiment of the present invention, the water purification assembly further includes a first end cap, the first end cap including a side wall and a top wall connected to each other, the side wall being connected to the inner wall of the housing, the top wall being sealed to the first end of the filter element by a filler adhesive, and the top wall, the side wall and the inner wall of the housing enclosing the accommodating space; wherein, the top wall is provided with a first through hole for the positive electrode conductor to pass through and a second through hole for the negative electrode conductor to pass through.

[0010] According to an embodiment of the present invention, the water purification assembly further includes a fixing base, the fixing base being detachably disposed on the side wall, the fixing base being provided with a first positioning hole adapted to the positive electrode conductor and a second positioning hole adapted to the negative electrode conductor, the positive electrode conductor being inserted through the first positioning hole and the negative electrode conductor being inserted through the second positioning hole.

[0011] According to one embodiment of the present invention, the housing is provided with a first insertion hole and a second insertion hole, the positive electrode conductor and the negative electrode conductor are located inside the housing, at least a portion of the positive electrode conductor is exposed in the first insertion hole, and at least a portion of the negative electrode conductor is exposed in the second insertion hole.

[0012] According to one embodiment of the present invention, the housing includes a first housing and a second housing connected to each other, the first housing being provided with a first insertion hole and a second insertion hole; the first end cap further includes a first baffle wall bent and connected to the top wall, the inner side of the first baffle wall being connected to the outer side of the filter element, and the outer side of the first baffle wall being sealed to the inner wall of the second housing.

[0013] According to one embodiment of the present invention, the inner wall of the housing is provided with a partition, and the partition and the second end of the filter element enclose a water outlet space, and the water outlet is connected to the water outlet port through the water outlet space.

[0014] According to one embodiment of the present invention, the water purification assembly further includes a second end cap, the second end cap including a bottom wall, the bottom wall being located between the second end of the capacitive deion filter and the side of the partition away from the inner wall of the housing; wherein, the bottom wall is provided with a through hole, and the water outlet communicates with the water outlet space through the through hole.

[0015] According to one embodiment of the present invention, the second end cap further includes a second baffle wall that is bent and connected to the bottom wall, the inner side of the second baffle wall being connected to the outer side of the pre-filter element, and a second gap being left between the outer side of the second baffle wall and the inner wall of the housing.

[0016] According to one embodiment of the present invention, the capacitive deionization filter element further includes a guide tube, the first end of the water outlet pipe forms the water outlet, 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;

[0017] The first water passage hole, the water passage gap, the second water passage hole, the inner cavity of the guide pipe, and the water outlet are sequentially connected in a fluid communication.

[0018] According to one embodiment of the present invention, a sealing element is provided inside the water outlet pipe, and the sealing element is located near the second end of the water outlet pipe;

[0019] The peripheral wall of the first end of the guide pipe is sealed to the inner wall of the first end of the outlet pipe, and the second water passage hole is formed between the second end of the guide pipe and the sealing member.

[0020] According to one embodiment of the present invention, the sealing element comprises:

[0021] A sealing plate is connected to the inner wall of the water outlet pipe;

[0022] Multiple protrusions are provided on the side of the sealing plate facing the water outlet. The multiple protrusions are spaced apart circumferentially. The second end of the guide pipe abuts against at least a portion of the multiple protrusions. A second water passage is formed between two adjacent protrusions.

[0023] 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;

[0024] 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;

[0025] 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.

[0026] According to one embodiment of the present invention, the pre-filter element includes any one of PP cotton filter element, carbon rod filter element or carbon fiber filter element;

[0027] Alternatively, the pre-filter may include multiple filter elements, which are nested together from the inside out, and each filter element may include any one of PP cotton filter, carbon rod filter, or carbon fiber filter.

[0028] 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.

[0029] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0030] Water first passes radially through the pre-filter, then is received by the gap between the pre-filter and the capacitive deionizer filter after purification by the pre-filter. Water from the gap then enters the capacitive deionizer filter from the side, and is finally discharged from the outlet after purification. In this way, by integrating the pre-filter and the capacitive deionizer filter into a single composite filter, a smaller space is occupied, simplifying the water circuit structure of existing water purification components.

[0031] 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

[0032] 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.

[0033] Figure 1 This is one of the structural schematic diagrams of the water purification component provided in the embodiments of the present invention.

[0034] Figure 2 This is the second structural schematic diagram of the water purification component provided in the embodiment of the present invention.

[0035] Figure 3This is the third structural schematic diagram of the water purification component provided in the embodiment of the present invention.

[0036] Figure 4 This is a schematic diagram of the structure of the capacitor deionization filter element provided in an embodiment of the present invention.

[0037] 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.

[0038] 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.

[0039] Figure 7 This is provided by the embodiments of the present invention. Figure 6 A magnified view of part K in the middle.

[0040] 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.

[0041] Figure 9 This is a schematic diagram of the structure of the first end cap provided in an embodiment of the present invention.

[0042] Figure 10 This is a schematic diagram of the structure of the second end cap provided in an embodiment of the present invention.

[0043] Figure 11 This is a cross-sectional schematic diagram of the electrode assembly stacking configuration provided in an embodiment of the present invention.

[0044] Figure 12 This is a cross-sectional schematic diagram of the electrode sheet provided in an embodiment of the present invention.

[0045] Figure 13 This is a schematic diagram of the structure of the fixing base provided in an embodiment of the present invention.

[0046] Figure 14 This is a schematic diagram of the assembly structure of the filter element, the first end cap, and the second end cap 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. Pre-filter element; 211. First water passage hole; 212. 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; 201. Positive electrode tab; 202. Negative electrode tab;

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

[0051] 4. Second end cap; 41. Bottom wall; 42. Second baffle wall;

[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 with Figures 1 to 14 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, an embodiment of the present invention provides a water purification component, including: a filter element 2.

[0061] The filter element 2 includes a capacitive deionization filter element 20 and a pre-filter element 24 sleeved on the outside of the capacitive deionization filter element 20. The capacitive 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 water outlet pipe 21 has a water outlet channel and a first water passage hole 211 communicating with the water outlet channel. The water outlet channel forms a water outlet 212. The first water passage hole 211 is located on the peripheral wall of the water outlet pipe 21. Water can pass through the outer side of the pre-filter element 24 and the capacitive deionization filter element 20 in sequence, and then be discharged from the water outlet 212.

[0062] The capacitive 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 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. The water outlet pipe 21 has a water outlet channel and a first water passage hole 211 and a water outlet 212 connected to the water outlet channel. The water outlet channel is located inside the water outlet pipe 21, the water outlet 212 is located at the first end of the water outlet pipe 21, and the first water passage hole 211 is located on the peripheral wall of the water outlet pipe 21.

[0063] 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.

[0064] 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.

[0065] It should be noted that the pre-filter 24 is used to physically filter impurities in the water. The pre-filter 24 is cylindrical. Depending on the material used, the pre-filter 24 can be any one of PP cotton filter, carbon rod filter, or carbon fiber filter; or, the pre-filter includes multiple filter elements, which are nested together from the inside out, and each filter element includes any one of PP cotton filter, carbon rod filter, or carbon fiber filter.

[0066] The capacitive deionization filter element 20 is columnar. When the pre-filter element 24 is sleeved on the outside of the capacitive deionization filter element 20, the pre-filter element 24 and the capacitive deionization filter element 20 can be configured to be coaxial or non-coaxial, without specific limitations.

[0067] Water first passes radially through the pre-filter 24, then is received by the water passage 201 between the pre-filter 24 and the capacitive deionizer 20 after purification by the pre-filter 24. Water then enters the capacitive deionizer 20 from the side of the passage 201, and is discharged from the outlet 212 after purification by the capacitive deionizer 20. Thus, by integrating the pre-filter 24 and the capacitive deionizer 20 into a single composite filter, a smaller space is occupied, simplifying the water path structure of existing water purification components.

[0068] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the water purification assembly also includes a housing 1, a filter element 2 disposed inside the housing 1, a first end of the filter element 2 forming an accommodating space 112 with the inner wall of the housing 1, a second end of the filter element 2 forming a water outlet space 111 with the inner wall of the housing 1, the water outlet space 111 and the accommodating space 112 being arranged opposite to each other, and a first gap being left between the outer side of the filter element 2 and the inner wall of the housing 1.

[0069] The housing 1 is provided with an outlet port 102 communicating with the outlet space 111 and an inlet port 101 communicating with the first gap. The outlet port 102 and the inlet port 101 are located on the same side of the housing 1. The outlet 212 is communicating with the outlet space 111. The positive and negative conductors that are electrically connected to the electrode assembly 22 extend into the accommodating space 112. The positive and negative conductors are spaced apart and are suitable for connection to an external power source.

[0070] 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.

[0071] A receiving space 112 is formed between the first end of the filter element 2 and the inner wall of the first end of the housing 1, and a water outlet space 111 is formed between the second end of the filter element 2 and the inner wall of the second end of the housing 1; the water inlet port 101 and the water outlet port 102 are respectively located at the second end of the housing 1 and are connected to the receiving cavity.

[0072] Since the positive and negative conductors are located in the accommodating space 112, and the outlet 212 of the capacitor deionization filter 20 is located in the outlet space 111, this design, based on the mutually isolated outlet space 111 and accommodating space 112, achieves water and electricity isolation of the water purification component, ensuring the reliability of the water purification operation of the water purification component.

[0073] In some embodiments, such as Figure 2 , Figure 3 and Figure 9As shown, the water purification assembly also includes: a first end cap 3; the first end cap 3 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 housing 1, the top wall 32 is connected to the first end of the filter element 2, and the top wall 32, the side wall 31 and the inner wall of the housing 1 enclose a receiving space 112; the top wall 32 is provided with a first through hole 322 for the positive electrode conductor to pass through and a second through hole for the negative electrode conductor to pass through.

[0074] 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 filter element 2 and abuts against the inner wall of the first end of the housing 1, so that the top wall 32, the side wall 31 and the inner wall of the housing 1 enclose and form an accommodating space 112.

[0075] In some embodiments, such as Figure 2 , Figure 3 and Figure 9 As shown, the first 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 housing 1, the top wall 32 and the first end of the filter element 2 are sealed to each other by a filler adhesive, and the inner side of the first baffle wall 33 is attached to the outer side of the filter element 2.

[0076] Understandably, the filler adhesive forms a sealant layer at the first end of the filter element 2, 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.

[0077] 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.

[0078] A first support rib may be provided on one side of the top wall 32 facing the filter element 2. The first support rib may be configured to extend radially along the filter element 2. The first support rib is used to ensure the thickness of the filling adhesive at the first end of the filter element 2 and to help ensure the molding quality of the filling adhesive.

[0079] By sealing the outer side of the first baffle wall 33 with the inner wall of the shell 1, 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 shell 1.

[0080] In some embodiments, such as Figure 2 As shown, in order to ensure the molding quality of the filler adhesive, the first end cap 3 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 filter element 2 and is disposed close to the outer side of the filter element 2.

[0081] 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.

[0082] In some embodiments, such as Figure 9 As shown, the projected area of ​​the first through hole 322 on the first end of the filter element 2 is greater than the projected area of ​​the positive conductor on the first end of the filter element 2, and the projected area of ​​the second through hole on the first end of the filter element 2 is greater than the projected area of ​​the negative conductor on the first end of the filter element 2.

[0083] This facilitates sealing of the positive and negative conductors at the first end of the filter element 2. In other words, after sealing the area between the baffle plate 321 and the first baffle wall 33 at the first end of the filter element 2, the remaining area (the area enclosed by the baffle plate 321) at the first end of the filter element 2 is sealed through the first through hole 322 and the second through hole.

[0084] In some embodiments, such as Figure 3 As shown, the inner wall of the housing 1 is provided with a partition 121, and the partition 121 and the second end of the filter element 2 enclose a water outlet space 111. The water outlet 212 is connected to the water outlet port 102 through the water outlet space 111.

[0085] Understandably, the partition 121 extends circumferentially relative to the water outlet 102, and the peripheral wall of the water outlet 212 of the capacitor deion filter 20 is sealed to the inner side of the partition 121, so that the partition 121 and the second end of the capacitor deion filter 20 enclose and form a water outlet space 111.

[0086] In some embodiments, such as Figure 2 , Figure 3 and Figure 10 As shown, the water purification assembly also includes: a second end cap 4, the second end cap 4 including a bent bottom wall 41 and a second baffle wall 42, the bottom wall 41 being located between the second end of the filter element 2 and the side of the partition 121 away from the inner wall of the housing 1, the bottom wall 41 having a through hole, the water outlet 212 passing through the through hole and communicating with the water outlet space 111;

[0087] The bottom wall 41 is sealed to the second end of the filter element 2 by a filler adhesive. The second baffle wall 42 is attached to the peripheral wall of the filter element 2. A second gap is left between the outer side of the second baffle wall 42 and the inner wall of the housing 1. The water inlet port 101 is connected to the first gap through the second gap.

[0088] Understandably, the filler adhesive forms a sealant layer at the second end of the filter element 2. The second sealant wall 42 is located on the outer edge of the bottom wall 41 and extends circumferentially relative to the outlet 212. The inner diameter of the second sealant wall 42 is adapted to the diameter of the filter element 2.

[0089] Multiple ribs can be provided on the outer side of the second baffle wall 42. The multiple ribs are arranged circumferentially along the second baffle wall 42 and abut against the inner wall of the housing 1, so that a second gap is formed between the outer side of the second baffle wall 42 and the inner wall of the housing 1. Of course, multiple ribs can also be provided on the inner wall of the housing 1. The multiple ribs are arranged circumferentially relative to the axis where the water outlet 212 is located and abut against the outer side of the second baffle wall 42. This design can also form a second gap between the outer side of the second baffle wall 42 and the inner wall of the housing 1.

[0090] Furthermore, in order to ensure the sealing effect of the second end of the filter element 2, a second support rib is provided on one side of the bottom wall 41 facing the filter element 2. The second support rib can be configured to extend radially along the filter element 2. The second support rib is used to ensure the thickness of the filling adhesive at the second end of the filter element 2 and to help ensure the molding quality of the filling adhesive.

[0091] In an alternative embodiment, such as Figure 9 and Figure 13 As shown, the water purification assembly also includes a fixing base 6. The fixing base 6 is provided with a first positioning hole 62 adapted to the positive conductor and a second positioning hole adapted to the negative conductor. The fixing base 6 is detachably mounted on the side wall 31. The positive conductor passes through the first positioning hole 62 and the first through hole 322 in sequence, and the negative conductor passes through the second positioning hole and the second through hole in sequence.

[0092] Thus, the coaxiality of the positive and negative conductors can be ensured through the first positioning hole 62 and the second positioning hole, further improving the docking progress of the positive conductor and the first through hole 322, as well as the docking progress of the negative conductor and the second through hole.

[0093] In some embodiments, such as Figure 9 and Figure 13 As shown, in order to improve the installation stability of the fixing seat 6 and the first end cover 3, 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 3 are engaged in the circumferential direction through the slot 61 and the buckle 311.

[0094] In an optional embodiment, each of the positive and negative conductors includes an electrical connector and a tab connected to the core. The tab is detachably electrically connected to the electrical connector, and the electrical connector is sequentially inserted into a corresponding positioning hole.

[0095] Specifically, the power connection component 5 includes a positive electrical connector 51 and a negative electrical connector 52. The electrode component 22 is provided with a positive electrode tab 201 and a negative electrode tab 202. The positive electrical connector 51 is electrically connected to the positive electrode tab 201 and can pass through the first positioning hole 62. The negative electrical connector 52 is electrically connected to the negative electrode tab 202 and can pass through the second positioning hole.

[0096] In some embodiments, 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 is provided with an abutting surface, the abutting surface abutting against the stepped surface.

[0097] 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.

[0098] In some embodiments, 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 201 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.

[0099] like Figure 2 As shown, the housing 1 is provided with a first insertion hole 103 and a second insertion hole 104. The positive electrode conductor and the negative electrode conductor are located inside the housing 1. At least a portion of the positive electrode conductor is exposed in the first insertion hole 103, and at least a portion of the negative electrode conductor is exposed in the second insertion hole 104.

[0100] Specifically, the housing 1 is provided with a first insertion hole 103 and a second insertion hole 104 communicating with the accommodating space 112. The first insertion hole 103 and the second insertion hole 104 are located on one side of the housing 1, and the water outlet port 102 and the water inlet port 101 are located on the other side of the housing 1. The first insertion hole 103 corresponds to the positive electrical connector 51, and the second insertion hole 104 corresponds to the negative electrical connector 52. Exemplarily, the positive electrical connector 51 can be exposed through the first through hole 322, and the negative electrical connector 52 can be exposed through the second through hole, thus enabling the positive electrode tab 201 and the negative electrode tab 202 to be connected to an external power source.

[0101] like Figure 2 and Figure 3As shown, the housing 1 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 first end of the capacitor deionization filter element 20 has a positive electrode conductor and a negative electrode conductor, which are located inside the first housing 11. At least a portion of the positive electrode conductor is exposed in the first insertion hole 103, and at least a portion of the negative electrode conductor is exposed in the second insertion hole 104. The outer surface of the capacitor deionization filter element 20 is sealed to the inner wall of the second housing 12 near its first end. A first gap is left between the outer surface of the capacitor deionization filter element 20 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 first gap. The water outlet 212 located at the second end of the capacitor deionization filter element 20 is connected to the water outlet port 102.

[0102] 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.

[0103] In addition, the outer side of the capacitive deion filter element 20 is sealed to the inner wall of the second housing 12 near its first 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 the water entering the second housing 12 through the water inlet port 101 cannot enter the first housing 11.

[0104] When assembling the capacitive deionization filter element 20 into the housing 1, the capacitive deionization filter element 20 is first installed into the second housing 12, so that the outlet 212 at the second end of the capacitive deionization filter element 20 is connected to the outlet port 102 at 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 conductor at the first end of the capacitive deionization filter element 20 is exposed in the first insertion hole 103, and at least a portion of the negative electrode conductor is exposed in the second insertion hole 104. After the positive electrode conductor is joined to the first insertion hole 103 and the negative electrode conductor 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 between the positive electrode conductor and the first insertion hole 103, and the alignment accuracy between the negative electrode conductor and the second insertion hole 104, can be ensured.

[0105] In practical applications, such as Figure 9 , Figure 10 , Figure 13 and Figure 14As shown, firstly, a layer of filler adhesive is applied to a first region at the first end of the capacitive deionization filter element 20. This first region is the area between the first adhesive-blocking wall 33 and the adhesive-blocking plate 321. Then, the first end cap 3 is placed on the first end of the capacitive deionization filter element 20. Since the first adhesive-blocking wall 33 adheres to the peripheral wall of the capacitive deionization 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 capacitive deionization filter element 20, but also limits the capacitive deionization filter element 20 radially, ensuring the coaxiality of the capacitive deionization filter element 20 and the water outlet port 102. Next, a layer of filler adhesive is applied to a second region at the first end of the capacitive deionization filter element 20. This second region is the area enclosed by the adhesive-blocking plate 321, thus completing the sealing of the first end of the capacitive deionization filter element 20. 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 201, and the second positioning hole can correspond to the negative electrode tab 202. 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 201. The negative electrode electrical connector 52 is installed in the second positioning hole and completes the insertion cooperation with the negative electrode tab 202. 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.

[0106] In an optional embodiment, 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 two ends of the electrode assembly 22 along the axial direction of the 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.

[0107] The water outlet pipe 21 has a water outlet channel and a water passage hole and a water outlet 212 connected to the water outlet channel. The water outlet channel is located inside the water outlet pipe 21 and forms a water outlet 212. The water passage hole is located on the peripheral wall of the water outlet pipe 21.

[0108] Furthermore, such as Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 As shown, the capacitive deionization filter element 20 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.

[0109] 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 212, 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;

[0110] 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 212 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.

[0111] 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.

[0112] 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.

[0113] 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 located away from the outlet 212. 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, under the guidance of the guide pipe 23, it is output from the outlet 212. During the water flow, because the second water passage hole 202 is located away from the outlet 212, 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 capacitor deion filter 20.

[0114] 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.

[0115] 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.

[0116] 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.

[0117] 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.

[0118] 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.

[0119] 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 212, 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.

[0120] 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.

[0121] In some embodiments, in order to ensure the venting effect of the capacitive deion filter 20, 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.

[0122] 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 outlet 212 accounts for no more than 15% of the length of the outlet pipe 21.

[0123] Optionally, the length of the capacitor deionization filter element 20 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 as possible from the outlet 212 of the capacitor deionization filter element 20, thereby ensuring the air venting effect.

[0124] 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 20 mm². For example, the sum of the water passage areas of the multiple second water passage holes 202 is 20 mm², 25 mm², 35 mm², and 50 mm², etc. This design avoids large flow resistance when water passes through the second water passage holes 202 and prevents the second water passage holes 202 from restricting the flow of water.

[0125] In some embodiments, such as Figure 8 , Figure 10 and Figure 12 As shown, 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;

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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 capacitive deionization filter element 20 is the adsorption purification process.

[0132] 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.

[0133] As can be seen from the above, the capacitive deionization 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.

[0134] 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 passage 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 capacitive deionization filter element 20 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.

[0135] 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.

[0136] 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.

[0137] Among them, such as Figure 11 As shown, the stacking direction is along the thickness direction of the insulating sheet 221 or the electrode sheet 222.

[0138] 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.

[0139] 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.

[0140] Understandably, by setting the number of electrode plates 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 capacitor deion filter 20 at the same time, thereby improving the purification efficiency of the raw water.

[0141] 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 capacitor deion filter element 20.

[0142] 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.

[0143] 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 201 and a negative electrode tab 202; the positive electrode tab 201 is electrically connected to the current collector layer 2221 of the positive electrode plate; the negative electrode tab 202 is electrically connected to the current collector layer 2221 of the negative electrode plate.

[0144] 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 201, and the second extensions of each negative electrode are stacked to form a negative electrode tab 202.

[0145] 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.

[0146] 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.

[0147] 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.

[0148] 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.

[0149] 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.

[0150] 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.

[0151] 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.

[0152] In optional embodiments, such as Figure 3 As shown, one end of the water outlet pipe 21 with the water outlet 212 extends into the water outlet space 111, and the outer side of the water outlet pipe 21 is sealed to the inner wall of the water outlet space 111.

[0153] In other words, one end of the water outlet pipe 21 with the water outlet 212 extends into the partition 121, and the outer side of the water outlet pipe 21 is sealed to the inner side of the partition 121, for example, by means of a sealing ring.

[0154] The adsorption layer includes activated carbon, titanium dioxide, a conductive agent, and a binder, with the mass ratio of activated carbon to titanium dioxide being (5~1):1.

[0155] For the electrode sheet, the current collector layer can be made of metal or graphite material so that the current collector layer forms a conductive layer, and the adsorption layer of the electrode sheet can be made of activated carbon and other adsorption materials to adsorb ions in the raw water.

[0156] Meanwhile, the insulating sheet can be made of plastic. The insulating sheet serves as a support between the positive and negative electrode plates, preventing short circuits between them and ensuring the formation of a water passage between them.

[0157] Furthermore, by setting the adsorption layer 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.

[0158] It should be noted that both the current collector layer 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 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.

[0159] In some embodiments, heavy metals include, but are not limited to, Pb, As, Fe, Cr, and Cu.

[0160] In some embodiments, the particle size of the activated carbon is 5 μm to 15 μm, and the specific surface area of ​​the activated carbon is 1500 m². 2 / g~2200m 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 m 2 / g, 1900 m 2 / g, 2000 m 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.

[0161] 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.

[0162] In some embodiments, the conductive agent comprises 2% to 5% of the total mass of the adsorption layer. For example, the mass percentage could be 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, or 5%. This improves the conductivity and electron transport capability of the electrode sheet.

[0163] In some embodiments, the binder accounts for 5% to 10% of the total mass of the adsorption layer. 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.

[0164] 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 has excellent ion adsorption performance and a high ion removal rate.

[0165] 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.

[0166] Furthermore, based on the total mass of the adsorption layer, 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 and ion removal rate of the electrode.

[0167] 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 122 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 122, 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, the mass ratio of the binder is very small compared to that of the activated carbon material. Therefore, compared to existing modifications 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 prepared by the binder modification in this application is no worse than that of the electrode sheet prepared by the activated carbon material modification. Therefore, this invention provides a new approach to improve the adsorption performance of the electrode sheet 12.

[0168] 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.

[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 pre-filter element (24) sleeved on the outside of the capacitor deionization filter element (20). 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 water outlet pipe (21) has a water outlet channel and a first water passage hole (211) communicating with the water outlet channel. The water outlet channel forms a water outlet (212). The first water passage hole (211) is located on the peripheral wall of the water outlet pipe (21). Water can pass through the outer side of the pre-filter element (24) and the electrode assembly (22) in sequence, and then be discharged from the water outlet (212). The water purification assembly also includes a housing (1), and the filter element (2) is disposed inside the housing (1). The first end of the filter element (2) forms an accommodating space (112) with the inner wall of the housing (1), and the second end of the filter element (2) forms a water outlet space (111) with the inner wall of the housing (1). The water outlet space (111) and the accommodating space (112) are arranged opposite to each other, and a first gap is left between the outer side of the filter element (2) and the inner wall of the housing (1). The housing (1) is provided with an outlet port (102) communicating with the outlet space (111) and an inlet port (101) communicating with the first gap. The outlet port (102) and the inlet port (101) are located on the same side of the housing (1). The outlet (212) is communicating with the outlet space (111). The positive electrode conductor and the negative electrode conductor electrically connected to the electrode assembly (22) both extend into the accommodating space (112). The positive electrode conductor and the negative electrode conductor are spaced apart and are suitable for connection to an external power source. The water purification assembly also includes a first 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 housing (1), and the top wall (32) is sealed to the first end of the filter element (2) by a filler adhesive. The top wall (32), the side wall (31), and the inner wall of the housing (1) enclose the accommodating space (112). The top wall (32) is provided with a first through hole (322) for the positive conductor to pass through and a second through hole for the negative conductor to pass through.

2. The water purification component according to claim 1, characterized in that, The water purification assembly also includes a fixing seat (6), which is detachably disposed on the side wall (31). The fixing seat (6) is provided with a first positioning hole (62) adapted to the positive electrode conductor and a second positioning hole adapted to the negative electrode conductor. The positive electrode conductor is inserted through the first positioning hole (62), and the negative electrode conductor is inserted through the second positioning hole.

3. The water purification component according to claim 1, characterized in that, The housing (1) is provided with a first insertion hole (103) and a second insertion hole (104). The positive electrode conductor and the negative electrode conductor are located inside the housing (1). At least part of the positive electrode conductor is exposed in the first insertion hole (103), and at least part of the negative electrode conductor is exposed in the second insertion hole (104).

4. The water purification component according to claim 3, characterized in that, The housing (1) 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 first end cap (3) also includes a first baffle wall (33) that is bent and connected to the top wall (32). The inner side of the first baffle wall (33) is connected to the outer side of the filter element (2), and the outer side of the first baffle wall (33) is sealed to the inner wall of the second housing (12).

5. The water purification component according to claim 1, characterized in that, The inner wall of the housing (1) is provided with a partition (121), and the partition (121) and the second end of the filter element (2) enclose a water outlet space (111). The water outlet (212) is connected to the water outlet port (102) through the water outlet space (111).

6. The water purification component according to claim 5, characterized in that, The water purification assembly further includes a second end cap (4), which includes a bottom wall (41) located between the second end of the capacitor deion filter (20) and the side of the partition (121) away from the inner wall of the housing (1); wherein the bottom wall (41) is provided with a through hole, and the water outlet (212) is connected to the water outlet space (111) through the through hole.

7. The water purification component according to claim 6, characterized in that, The second end cap (4) also includes a second baffle wall (42) that is bent and connected to the bottom wall (41). The inner side of the second baffle wall (42) is connected to the outer side of the pre-filter (24), and a second gap is left between the outer side of the second baffle wall (42) and the inner wall of the housing (1).

8. The water purification component according to any one of claims 1 to 7, characterized in that, The capacitor deionization filter element (20) also includes a guide tube (23). The first end of the water outlet pipe (21) forms the water outlet (212), and the second end of the water outlet pipe (21) is closed. The guide tube (23) passes through the water outlet pipe (21) to form a water passage gap (201) between the guide tube (23) and the water outlet pipe (21). The peripheral wall of the first end of the guide tube (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 tube (23) and the second end of the water 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 water outlet (212) are sequentially connected in a fluid communication.

9. The water purification component according to claim 8, characterized in that, The outlet pipe (21) is provided with a sealing element (230), which is located near the second end of the 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 outlet pipe (21), and the second water passage hole (202) is formed between the second end of the guide pipe (23) and the sealing member (230).

10. The water purification component according to claim 9, characterized in that, The sealing element (230) includes: The sealing plate (2301) is connected to the inner wall of the water outlet pipe (21); Multiple protrusions (2302) are provided on the side of the sealing plate (2301) facing the outlet (212). The multiple protrusions (2302) are spaced apart circumferentially. The second end of the guide pipe (23) abuts against at least a portion of the multiple protrusions (2302). A second water passage hole (202) is formed between two adjacent protrusions (2302).

11. The water purification component according to any one of claims 1 to 7, 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).

12. The water purification component according to any one of claims 1 to 7, characterized in that, The pre-filter (24) includes any one of PP cotton filter, carbon rod filter or carbon fiber filter; Alternatively, the pre-filter (24) may include multiple filter elements, which are nested together from the inside out, and each filter element may include any one of PP cotton filter element, carbon rod filter element or carbon fiber filter element.

13. 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 12; The machine body has an installation cavity, and the water purification component is detachably disposed in the installation cavity.

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