Water purification assembly and water purification equipment

Abstract

The utility model relates to the technical field of water purification, and provides a water purification assembly and water purification equipment. The water purification assembly comprises a front filter element, a capacitive deionization filter element, a first end cover and a second end cover; the front filter element sleeves the outer side of the capacitive deionization filter element and is separated from the capacitive deionization filter element, so that a water passing gap is formed between the inner wall of the front filter element and the peripheral wall of the capacitive deionization filter element; the first end cover is respectively connected with the first ends of the front filter element and the capacitive deionization filter element in a sealing manner, and the second end cover is respectively connected with the second ends of the front filter element and the capacitive deionization filter element in a sealing manner; the first end of the capacitive deionization filter element is provided with a water outlet, and the gap width of the water passing gap is not less than 0.3 mm. According to the water purification assembly disclosed by the utility model, the front filter element and the capacitive deionization filter element are integrated, so that the occupied space is small, the waterway structure of the existing water purification assembly is simplified, and the water purification treatment effect can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of water purification, in particular to a water purification component and water purification equipment. Background Art

[0002] Capacitive deionization (CDI) is a water desalination and purification technology based on double-layer capacitance theory. Its basic principle is that when a low voltage is applied to electrodes, cations, anions, or charged particles in the solution migrate toward the two poles under the influence of the electric field and concentration gradient, adsorbing on the electrode surface to form a double layer, thereby achieving desalination or purification. Capacitive deionization technology can achieve different output water qualities at different voltages, while retaining ions beneficial to the human body and removing heavy metal ions.

[0003] In related technologies, capacitive deionization filters are usually combined with other filter elements used for physical filtration to ensure water purification effects. However, since each filter element is used independently, the water purification component formed by this combination not only has complex water channels, but also occupies a large site space, which is not conducive to application in water purification equipment. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a water purification assembly that integrates a pre-filter element and a capacitor deionizing filter element into one unit, which occupies a small space, simplifies the water path structure of the existing water purification assembly, and ensures a stable water flow gap between the pre-filter element and the capacitor deionizing filter element, thereby ensuring the water purification effect of the water purification assembly and facilitating its application in water purification equipment.

[0005] The utility model also provides a water purification device.

[0006] According to the first embodiment of the present invention, the water purification component includes:

[0007] A pre-filter element and a capacitor deionizing filter element, wherein the pre-filter element is sleeved on the outside of the capacitor deionizing filter element, the pre-filter element is separated from the capacitor deionizing filter element, and a water-passing gap is formed between the inner wall of the pre-filter element and the peripheral wall of the capacitor deionizing filter element, and the gap width of the water-passing gap is not less than 0.3 mm;

[0008] a first end cap and a second end cap, wherein the first end cap is sealedly connected to the first end of the pre-filter element and the capacitor deionizing filter element, respectively, and the second end cap is sealedly connected to the second end of the pre-filter element and the capacitor deionizing filter element, respectively;

[0009] The first end of the capacitor deionizing filter element is provided with a water outlet extending from the first end cover, and water can sequentially pass through the pre-filter element, the water gap and the capacitor deionizing filter element, and then be discharged from the water outlet.

[0010] According to one embodiment of the present invention, the pre-filter element and the capacitive deionization filter element are coaxially arranged.

[0011] According to one embodiment of the present invention, the second end cover comprises: a second cover body and a first adhesive stop wall connected in a bent manner; a first positioning portion is provided at the center of the second cover body, and the first adhesive stop wall is extended circumferentially relative to the first positioning portion;

[0012] A second positioning portion is provided at the center of the second end of the capacitor deionization filter element, and the first positioning portion and the second positioning portion are connected; the second cover body is sealed with the pre-filter element and the second end of the capacitor deionization filter element respectively through filling glue, and the first glue blocking wall is sleeved on the peripheral wall of the pre-filter element.

[0013] According to an embodiment of the present invention, the first positioning portion includes a positioning protrusion, the second positioning portion includes a positioning groove, and the positioning protrusion is inserted into the positioning groove.

[0014] According to one embodiment of the present invention, the inner wall surface of the first glue retaining wall is provided with a plurality of first positioning ribs, the plurality of first positioning ribs are arranged circumferentially relative to the first positioning portion, and each first positioning rib extends along the axial direction of the capacitor deionization filter element; each first positioning rib is used to contact the peripheral wall of the pre-filter element.

[0015] According to one embodiment of the present invention, a second positioning rib is further provided on the second cover body, and the second positioning rib extends circumferentially relative to the first positioning portion, and the second positioning rib is embedded between the inner wall of the pre-filter element and the peripheral wall of the capacitor deionization filter element.

[0016] According to one embodiment of the present invention, the pre-filter element includes any one of a PP cotton filter element, a carbon rod filter element or a carbon fiber filter element;

[0017] Alternatively, the pre-filter element includes multiple layers of filter elements, which are sequentially integrated from the inside to the outside, and each layer of the filter element includes any one of a PP cotton filter element, a carbon rod filter element or a carbon fiber filter element.

[0018] According to one embodiment of the present invention, the capacitive deionization filter element includes: a central column and an electrode assembly; the electrode assembly is wound around the peripheral wall of the central column, and the water gap is formed between the inner wall of the pre-filter element and the peripheral wall of the electrode assembly; the first end cap is sealed to the first end of the electrode assembly, and the second end cap is sealed to the second end of the electrode assembly;

[0019] The central column has a water outlet channel and a water hole connected to the water outlet channel and the water outlet. The water outlet channel is arranged in the central column, the water outlet is arranged at the first end of the central column, and the water hole is arranged on the peripheral wall near the second end of the central column.

[0020] According to an embodiment of the present invention, a guide groove is provided on the peripheral wall of the central column, and fluid communication is formed between the guide groove and the water hole.

[0021] 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 the electrode sheets;

[0022] 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; two adjacent electrode sheets are respectively configured as a positive electrode sheet and a negative electrode sheet, and a water passage for accommodating the insulating sheet is formed between the positive electrode sheet and the negative electrode sheet;

[0023] The inner and outer ends of the electrode assembly relative to the central column are correspondingly formed as a water outlet and a water inlet; the water inlet is connected to the water outlet through the water passage, and the water outlet extends toward the peripheral wall of the central column and forms a fluid connection with the water hole.

[0024] According to one embodiment of the present invention, the water purification component further includes:

[0025] a housing having a water inlet port and a water outlet port, wherein the water inlet port and the water outlet port are located at a first end of the housing;

[0026] The pre-filter element and the capacitor deionizing filter element are arranged in the housing, and a gap is left between the peripheral wall of the pre-filter element and the inner wall of the housing; a water outlet space and a receiving space that are isolated from each other are formed between the first end of the capacitor deionizing filter element and the inner wall of the first end of the housing, and the receiving space is located outside the water outlet space; the second end cap abuts against the inner wall of the second end of the housing;

[0027] In which, the water inlet port is connected to the gap, and the water outlet, the water outlet space and the water outlet port are connected in sequence; the positive pole tab and the negative pole tab of the capacitor deionization filter element both extend into the accommodating space, and the positive pole tab and the negative pole tab are spaced apart and suitable for connection to an external power supply.

[0028] According to one embodiment of the present invention, the inner wall of the first end of the shell is provided with a first partition and a second partition, and the first end cover has a central hole, and the central hole is used to accommodate the positive electrode tab, the negative electrode tab and the water outlet;

[0029] The second partition is located outside the first partition, and the water outlet space is formed between the first partition and the first end of the capacitor deionization filter element. The accommodating space is formed between the first partition, the second partition and the first end of the capacitor deionization filter element.

[0030] According to one embodiment of the present invention, the first end cover includes a first side wall and a first cover body connected by a bending motion, the center hole is provided in the first cover body, and the first side wall is provided to extend circumferentially relative to the center hole;

[0031] The outer side surface of the first side wall is sealed to the inner side surface of the second partition, and the first cover is sealed to the first end of the pre-filter element and the first end of the capacitor deionization filter element respectively through filling glue;

[0032] The positive electrode tab and the negative electrode tab are located in an area enclosed by the first side wall and the first separator.

[0033] According to an embodiment of the present invention, the first end cover further includes: a second rubber blocking wall, the second rubber blocking wall is bent and connected to the first cover body, and the second rubber blocking wall is arranged on the outside of the peripheral wall of the pre-filter element.

[0034] According to the second embodiment of the present invention, the water purification device includes: a body and the water purification component as described above; the body has an installation cavity, and the water purification component is detachably arranged in the installation cavity.

[0035] The above-mentioned one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: by integrating the pre-filter element and the capacitor deionization filter element into one to form a composite filter element, this composite filter element occupies a small space and simplifies the water path structure of the existing water purification component; at the same time, the two ends of the composite filter element are sealed by the first end cover and the second end cover, so that a stable water flow gap can be formed between the pre-filter element and the capacitor deionization filter element, ensuring that the water body is purified along the water flow path of the pre-filter element, the water flow gap and the capacitor deionization filter element, while ensuring the purification effect of the water body. This water purification component can be widely applicable to water purification equipment.

[0036] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 This is one of the structural diagrams of the water purification assembly provided by the embodiment of the present utility model;

[0039] Figure 2 This is the second structural diagram of the water purification component provided by the embodiment of the utility model;

[0040] Figure 3 This is the third structural diagram of the water purification assembly provided by the embodiment of the utility model;

[0041] Figure 4 This is a partial cross-sectional view of the pre-filter element and the capacitor deionization filter element provided by an embodiment of the present utility model, which are coaxially arranged based on the second end cap;

[0042] Figure 5 This is a schematic structural diagram of the second end cover provided by an embodiment of the present utility model;

[0043] Figure 6 This is a schematic structural diagram of a first end cover provided by an embodiment of the present utility model;

[0044] Figure 7 This is one of the structural diagrams of the central column provided by the embodiment of the present utility model;

[0045] Figure 8 This is the second structural diagram of the central column provided by the embodiment of the present utility model;

[0046] Figure 9 This is a schematic structural diagram of an electrode assembly provided by an embodiment of the present invention wound around the peripheral wall of a central column;

[0047] Figure 10 This is a schematic cross-sectional view of the electrode assembly provided by an embodiment of the present utility model;

[0048] Figure 11 This is a schematic cross-sectional view of an electrode sheet provided by an embodiment of the present utility model;

[0049] Reference numerals:

[0050] 1. Shell; 101. Water inlet port; 102. Water outlet port; 111. Water outlet space; 112. Accommodation space; 121. First partition; 122. Second partition;

[0051] 2. Capacitive deionization filter element; 20. Second positioning portion; 21. Center column; 22. Electrode assembly; 211. Water outlet channel; 212. Water hole; 213. Water outlet; 214. Diversion groove; 221. Insulation sheet; 222. Electrode sheet; 2201. Water outlet channel; 2221. Current collector layer; 2222. Adsorption layer; 201. Positive electrode tab; 202. Negative electrode tab;

[0052] 3. First end cover; 31. First side wall; 32. First cover body; 33. Second rubber retaining wall;

[0053] 4. Second end cover; 41. Second cover body; 42. First adhesive retaining wall; 410. First positioning portion; 420. First positioning rib;

[0054] 5. Electrical connection assembly; 51. Positive terminal; 52. Negative terminal;

[0055] 6. Pre-filter element. DETAILED DESCRIPTION

[0056] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0057] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0058] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0059] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0061] The following combination Figures 1-11, the water purification component and water purification equipment provided by the embodiment of the utility model are described in detail through specific embodiments and their application scenarios.

[0062] In the first aspect, Figure 2 、 Figure 3 and Figure 4 As shown, the embodiment of the present utility model provides a water purification component, comprising: a pre-filter element 6, a capacitive deionizing filter element 2, a first end cap 3 and a second end cap 4;

[0063] The pre-filter element 6 is sleeved on the outside of the capacitor deionizing filter element 2. The pre-filter element 6 and the capacitor deionizing filter element 2 are separated from each other. A water-passing gap is formed between the inner wall of the pre-filter element 6 and the peripheral wall of the capacitor deionizing filter element 2. The gap width of the water-passing gap is not less than 0.3 mm.

[0064] The first end cap 3 is sealed and connected to the first end of the pre-filter element 6 and the capacitor deionizing filter element 2, respectively. The second end cap 4 is sealed and connected to the second end of the pre-filter element 6 and the capacitor deionizing filter element 2, respectively.

[0065] Among them, the first end of the capacitor deionization filter element 2 is provided with a water outlet 213 extending from the first end cover 3. The water body can pass through the pre-filter element 6, the water gap and the capacitor deionization filter element 2 in sequence and then be discharged from the water outlet 213.

[0066] It is understood that the pre-filter element 6 is used to physically filter impurities in the water body. The pre-filter element 6 is cylindrical and, depending on the material selected for the pre-filter element 6, can be any one of a PP cotton filter element, a carbon rod filter element, or a carbon fiber filter element. The pre-filter element 6 can also include a multi-layer filter element, which is sequentially integrated from the inside to the outside, and each layer of the filter element includes any one of a PP cotton filter element, a carbon rod filter element, or a carbon fiber filter element; wherein the types of the filter elements in two adjacent layers are different; for example, when the pre-filter element 6 is a two-layer filter element, the filter element in the outer layer can be a PP cotton filter element, and the filter element in the outer layer can be a carbon rod filter element or a carbon fiber filter element.

[0067] The capacitor deionizing filter element 2 is cylindrical. When the pre-filter element 6 is sleeved on the outside of the capacitor deionizing filter element 2, the pre-filter element 6 and the capacitor deionizing filter element 2 can be configured to be coaxial or non-coaxial, and there is no specific limitation on this. Among them, the first end cap 3 and the second end cap 4 are used to realize the integration of the pre-filter element 6 and the capacitor deionizing filter element 2 separated from each other to form a composite filter element, and the first end cap 3 and the second end cap 4 also realize the sealing of the two ends of the composite filter element to ensure that the water body first passes through the pre-filter element 6 in the radial direction, and then receives the water body purified by the pre-filter element 6 in the water gap, and then the water body in the water gap enters the capacitor deionizing filter element 2 from the side of the capacitor deionizing filter element 2, and the water body purified by the capacitor deionizing filter element 2 is discharged from the water outlet 213.

[0068] At the same time, the inner wall of the pre-filter element 6 does not contact the peripheral wall of the capacitor deionization filter element 2, so as to form a water gap between the relative wall surfaces of the pre-filter element 6 and the capacitor deionization filter element 2. This design ensures the smooth flow of the water path between the pre-filter element 6 and the capacitor deionization filter element 2. After the pre-filter element 6 filters the water body, the pre-filter element 6 can transport the treated water body to the peripheral wall of the capacitor deionization filter element 2, and then the capacitor deionization filter element 2 desalinates the received water body.

[0069] like Figure 4 As shown, the gap width of the water gap is represented by the letter D, and the gap width can be specifically set to 0.3mm, 0.35mm, 0.4mm, 0.45mm, 0.5mm, 0.55mm, 0.6mm, etc.

[0070] The capacitor deionization filter element 2 includes a cylindrically wound electrode assembly 22. The electrode assembly 22 typically includes a stacked positive electrode sheet and a negative electrode sheet. The positive electrode sheet and the negative electrode sheet are isolated from each other, and a flow channel for the water body to flow is formed between the positive electrode sheet and the negative electrode sheet. Because the capacitor deionization filter element 2 is sealed at both ends along its axial direction, when a positive voltage is applied to the positive electrode sheet and the negative electrode sheet, cations, anions, or charged particles in the water body will migrate to the surfaces of the positive electrode sheet and the negative electrode sheet under the action of the electric field force, thereby outputting purified water after desalination treatment from the inside of the electrode assembly 22. When a reverse voltage is applied to the positive electrode sheet and the negative electrode sheet, or when the voltage is stopped, the anions, cations, or charged particles adsorbed on the surfaces of the positive electrode sheet and the negative electrode sheet will automatically detach, thereby outputting wastewater with a higher concentration from the inside of the electrode assembly 22.

[0071] As can be seen from the above, by integrating the pre-filter element 6 and the capacitor deionization filter element 2 into one to form a composite filter element, this composite filter element occupies a small space and simplifies the water path structure of the existing water purification component; at the same time, the two ends of the composite filter element are sealed by the first end cover 3 and the second end cover 4, so that a stable water flow gap can be formed between the pre-filter element 6 and the capacitor deionization filter element 2. While ensuring that the water body is purified along the water flow path of the pre-filter element 6, the water flow gap and the capacitor deionization filter element 2, the purification effect of the water body is ensured. This water purification component can be widely used in water purification equipment.

[0072] In some embodiments, as Figure 2 and Figure 3As shown, the pre-filter element 6 and the capacitor deionization filter element 2 are coaxially arranged, which can ensure that a cylindrical water gap is formed between the pre-filter element 6 and the capacitor deionization filter element 2, and the gap widths of various parts of the water gap are kept consistent. This design can ensure that the flow rate of water received by various parts of the peripheral wall of the capacitor deionization filter element 2 is the same or close, so that the capacitor deionization filter element 2 can be effectively utilized, ensuring the water purification effect of the capacitor deionization filter element 2.

[0073] In some embodiments, as Figure 2 、 Figure 4 and Figure 5 As shown, the second end cover 4 includes: a second cover body 41 and a first rubber stop wall 42 connected by bending; a first positioning portion 410 is provided at the center of the second cover body 41, and the first rubber stop wall 42 is extended along the circumferential direction relative to the first positioning portion 410;

[0074] A second positioning portion 20 is provided at the center of the second end of the capacitor deionization filter element 2, and the first positioning portion 410 is connected to the second positioning portion 20; the second cover body 41 is sealed and connected to the pre-filter element 6 and the second end of the capacitor deionization filter element 2 respectively through filling glue, and the first glue blocking wall 42 is sleeved on the peripheral wall of the pre-filter element 6.

[0075] It is understood that the first positioning portion 410 and the second positioning portion 20 both extend along the axial direction of the capacitor deionization filter element 2 and can be configured to be arranged opposite to each other along the axial direction of the capacitor deionization filter element 2. The first positioning portion 410 and the second positioning portion 20 can be configured to be magnetically attracted or plug-fitted to achieve connection between the first positioning portion 410 and the second positioning portion 20.

[0076] Based on the mutual cooperation between the first positioning portion 410 and the second positioning portion 20, it can be ensured that the capacitor deionization filter element 2 and the axis where the first positioning portion 410 is located remain coaxially arranged; since the first rubber blocking wall 42 is extended circumferentially relative to the first positioning portion 410, the first rubber blocking wall 42 and the axis where the first positioning portion 410 is located remain coaxially arranged; since the first rubber blocking wall 42 is sleeved on the peripheral wall of the pre-filter element 6, under the limitation of the first rubber blocking wall 42, it can be ensured that the pre-filter element 6 and the capacitor deionization filter element 2 remain coaxially distributed, and the first rubber blocking wall 42 is also used to prevent the filling rubber from overflowing to the outer side of the pre-filter element 6.

[0077] Furthermore, the second cover 41 is disc-shaped, and the filling glue forms a sealant layer at the second end of the capacitor deionization filter element 2. The second cover 41 is in contact with the surface of the sealant layer to achieve a seal on the second end of the composite filter element formed by the pre-filter element 6 and the capacitor deionization filter element 2. A first support rib can be provided on the side of the second cover 41 facing the capacitor deionization filter element 2. The first support rib can be configured to extend radially along the capacitor deionization filter element 2. The first support rib is used to ensure the thickness of the filling glue at the second end of the composite filter element and helps to ensure the molding quality of the filling glue.

[0078] In some embodiments, as Figure 2 and Figure 4 As shown, in order to facilitate the connection between the first positioning portion 410 and the second positioning portion 20, the first positioning portion 410 includes a positioning protrusion, and the second positioning portion 20 includes a positioning groove, and the positioning protrusion is inserted into the positioning groove.

[0079] The diameter of the positioning protrusion can be configured to gradually increase from the end close to the capacitor deionization filter element 2 to the end far away from the capacitor deionization filter element 2, and the positioning groove is adapted to the structure of the positioning protrusion.

[0080] In some embodiments, as Figure 4 and Figure 5 As shown, the inner wall surface of the first rubber retaining wall 42 is provided with a plurality of first positioning ribs 420, and the plurality of first positioning ribs 420 are arranged circumferentially relative to the first positioning portion 410, and each first positioning rib 420 extends along the axial direction of the capacitor deionization filter element 2; each first positioning rib 420 is used to contact the peripheral wall of the pre-filter element 6.

[0081] It is understandable that the multiple first positioning ribs 420 can be configured to be evenly arranged along the circumferential direction relative to the first positioning portion 410, and the multiple first positioning ribs 420 cooperate with each other to position the pre-filter element 6 along the circumferential direction to ensure that the pre-filter element 6 and the capacitor deionization filter element 2 maintain a coaxial distribution.

[0082] At the same time, the first positioning rib 420 can also ensure that a certain gap is maintained between the inner wall surface of the first rubber barrier 42 and the peripheral wall of the pre-filter element 6, so that the pre-filter element 6 can also receive raw water in the area corresponding to the first rubber barrier 42, thereby purifying the raw water.

[0083] In some embodiments, the second cover 41 is further provided with a second positioning rib, which extends circumferentially relative to the first positioning portion 410 and is embedded between the inner wall of the pre-filter element 6 and the peripheral wall of the capacitor deionization filter element 2. This design can ensure that the pre-filter element 6 and the capacitor deionization filter element 2 are coaxially arranged based on the second positioning rib, thereby forming a stable water flow gap between the pre-filter element 6 and the capacitor deionization filter element 2.

[0084] In some embodiments, as Figure 2 、 Figure 7 、 Figure 8 and Figure 9 As shown, the capacitive deionization filter element 2 includes: a central column 21 and an electrode assembly 22; the electrode assembly 22 is wound around the peripheral wall of the central column 21, and a water gap is formed between the inner wall of the pre-filter element 6 and the peripheral wall of the electrode assembly 22; the first end cap 3 is sealed to the first end of the electrode assembly 22, and the second end cap 4 is sealed to the second end of the electrode assembly 22;

[0085] The center column 21 has a water outlet channel 211 and a water hole 212 and a water outlet 213 connected to the water outlet channel 211. The water outlet channel 211 is arranged in the center column 21, the water outlet 213 is arranged at the first end of the center column 21, and the water hole 212 is arranged on the peripheral wall near the second end of the center column 21.

[0086] It is understandable that when winding the electrode assembly 22, the inner side surface of one end of the electrode assembly 22 can be in contact with the peripheral wall of the central column 21, and then the electrode assembly 22 can be wound layer by layer with the central column 21 as the central axis until the electrode assembly 22 is wound in a columnar distribution form.

[0087] Considering that the surrounding wall of the existing central column is usually densely covered with multiple water holes, the water output from the inner side of the electrode assembly 22 will evenly pass through each water hole into the water outlet channel. If bubbles appear in the electrode assembly 22, the bubbles may adhere to the surface of the positive electrode sheet and / or the negative electrode sheet, and the flowing water will not have an effect on the desorption of the bubbles. However, the present application arranges the water hole 212 on the peripheral wall near the second end of the central column 21 so that the water hole 212 is arranged away from the water outlet 213. This design can limit the water output from the inner side of the electrode assembly 22 to gradually converge toward the area where the water hole 212 is located, and then be output in sequence through the water hole 212, the water outlet channel 211 and the water outlet 213. In the process of water flow, since the water hole 212 is arranged away from the water outlet 213, the flowing water will gradually converge toward the area where the water hole 212 is located. This will gradually squeeze the bubbles generated in the electrode assembly 22 to the area where the water hole 212 is located, and then enter the water outlet channel 211 from the water hole 212 and be discharged together with the water, thereby effectively removing the bubbles appearing in the capacitor deionization filter element 2.

[0088] From the above, it can be seen that during the desalination process of the capacitor deionization filter element 2, the bubbles generated in the filter element can be effectively discharged, which can prevent the capacitor deionization filter element 2 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 deionization filter element 2.

[0089] It should be pointed out here that the capacitive deionization filter element 2 also includes a protective cover, for example, the protective cover is a cylindrical film, the protective cover is arranged on the peripheral wall of the electrode assembly 22, and a plurality of water outlets are constructed on the protective cover to ensure that the water body can reach the outside of the electrode assembly 22 through the water outlet, and then the electrode assembly 22 desalinates the received water body.

[0090] In some embodiments, as Figure 7 and Figure 8 As shown, a guide groove 214 is provided on the peripheral wall of the central column 21 , and fluid communication is formed between the guide groove 214 and the water hole 212 .

[0091] It can be understood that by providing a guide groove 214 on the peripheral wall of the central column 21, it is possible to avoid the gap between the inner side of the electrode assembly 22 and the peripheral wall of the central column 21 being too small to limit the flow of water, thereby facilitating the use of the guide groove 214 to collect the purified water output from the inner side of the electrode assembly 22, and then drain the collected purified water into the water hole 212.

[0092] The depth of the guide groove 214 can be set to 2-5 mm.

[0093] In some embodiments, since the length of the center column 21 is approximately the same as the axial length of the electrode assembly 22 along the center axis, one end of the guide groove 214 is arranged on the peripheral wall near the first end of the center column 21, and the other end is arranged on the peripheral wall near the second end of the center column 21. The guide groove 214 can be used at various positions along the axial direction of the center column 21 to effectively collect the purified water output from the inner side of the electrode assembly 22, thereby ensuring the drainage effect of the purified water.

[0094] The guide groove 214 can be arranged along a spiral trajectory on the peripheral wall of the central column 21 , or can be arranged along a straight trajectory on the peripheral wall of the central column 21 , and there is no specific limitation on this.

[0095] In some embodiments, as Figure 7 As shown, the guide groove 214 is configured to extend along the axial direction of the central column 21 . This design can effectively reduce the drainage path of the purified water and also facilitate the processing of the guide groove 214 .

[0096] At the same time, since the inner and outer ends of the electrode assembly 22 relative to the center column 21 are correspondingly formed as the water outlet end and the water inlet end, the electrode assembly 22 is configured to be wound around the peripheral wall of the center column 21, and the water outlet end of the electrode assembly 22 extends along the axial direction of the center column 21. By setting the guide groove 214 to extend along the axial direction of the center column 21, it is convenient to set the guide groove 214 relative to the water outlet end of the electrode assembly 22, thereby ensuring the drainage effect of the purified water.

[0097] In some embodiments, as Figure 8As shown, in order to enhance the drainage effect of purified water, multiple guide grooves 214 and multiple water holes 212 are provided, and multiple guide grooves 214 and multiple water holes 212 are arranged relatively to each other, and at least part of the multiple water holes 212 are arranged along the circumference of the central column 21.

[0098] Optionally, each guide groove 214 may be configured to form fluid communication with a plurality of water holes 212 arranged along the axial direction of the central column 21 , and each guide groove 214 is extended along the axial direction of the central column 21 .

[0099] Optionally, multiple guide grooves 214 and multiple water holes 212 are arranged one by one relative to each other, multiple water holes 212 are arranged along the circumference of the center column 21, and multiple guide grooves 214 are also arranged along the circumference of the center column 21, and each guide groove 214 is extended along the axial direction of the center column 21.

[0100] In some embodiments, there are multiple water holes 212, and the total water flow area of ​​the multiple water holes 212 is not less than 20mm. 2 For example, the total water flow area of ​​the plurality of water holes 212 is 20 mm 2 , 25 mm 2 , 35 mm 2 and 50 mm 2 This design avoids a large flow resistance when the water passes through the water hole 212, and prevents the water hole 212 from limiting the flow of the water.

[0101] In some embodiments, in order to ensure the exhaust effect of the capacitor deionization filter element 2, the axial distance between the water hole 212 and the second end of the central column 21 is set to be no more than 15% of the length of the central column 21.

[0102] Optionally, the length of the capacitor deionization filter element 2 is approximately 333-350 mm, and the axial distance between the water hole 212 and the second end of the center column 21 can be set to be less than 50 mm, so that the water hole 212 is as far away from the water outlet 213 of the capacitor deionization filter element 2 as possible, thereby ensuring the exhaust effect.

[0103] In some embodiments, as Figure 9 、 Figure 10 and Figure 11 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;

[0104] 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 configured as a positive electrode sheet and a negative electrode sheet, respectively. A water passage 2201 for accommodating the insulating sheet 221 is formed between the positive electrode sheet and the negative electrode sheet.

[0105] The inner and outer ends of the electrode assembly 22 relative to the central column 21 are correspondingly formed as a water outlet and a water inlet; the water inlet is connected to the water outlet through the water channel 2201, and the water outlet extends to the peripheral wall of the central column 21 and forms a fluid connection with the water hole 212.

[0106] It is understood that the insulating sheets 221 and electrode sheets 222 are stacked in an alternating arrangement so that the insulating sheet 221 is sandwiched between two adjacent layers of electrode sheets 222. Since the two adjacent layers of electrode sheets 222 are configured as positive and negative electrodes, respectively, when the number of electrode sheets 222 is greater than two, in order to meet the raw water filtration requirements of the electrode assembly 22, when the electrode assembly 22 is powered, 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 sheet is electrically connected to the positive electrode of the power supply, and the current collector layer 2221 of the negative electrode sheet is electrically connected to the negative electrode of the power supply. When the number of electrode sheets 222 is equal to two, the insulating sheet 221 can be directly sandwiched between the positive and negative electrodes.

[0107] For the electrode sheet 222, the current collector layer 2221 of the electrode sheet 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 the electrode sheet 222 can be made of activated carbon and other adsorption materials to achieve adsorption of ions in the raw water.

[0108] At the same time, the insulating sheet 221 can be made of plastic material. The insulating sheet 221 is used to play a supporting role between the positive electrode sheet and the negative electrode sheet, not only preventing the positive electrode sheet and the negative electrode sheet from short-circuiting, but also ensuring that a water channel 2201 is formed between the positive electrode sheet and the negative electrode sheet.

[0109] In practice, the capacitive deionization filter element 2 operates through an adsorption purification process and a desorption regeneration process. When two adjacent electrode sheets 222 are electrically connected to the positive and negative poles of a power source and the power supply is activated, the anions and cations in the raw water are attracted to the oppositely charged electrode sheet 222 and adsorbed by the adsorption layer 2222 on the electrode sheet 222. This operation of the capacitive deionization filter element 2 is the adsorption purification process.

[0110] Accordingly, when the power supply is stopped or a reverse voltage is applied to two adjacent electrode sheets 222, the ions adsorbed by the adsorption layer 2222 are released into the water body of the water channel 2201. At this time, the water channel 2201 will output concentrated water with a higher ion concentration.

[0111] As can be seen from the above, by setting the adsorption layer 2222 on the front and back sides of the current collector layer 2221, the integrated design of the electrode sheet 222 can be realized. The electrode assembly 22 can be formed by simply stacking the electrode sheet 222 and the insulating sheet 221 in an alternating arrangement. This stacking 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.

[0112] At the same time, in actual applications, simply electrically connecting two adjacent layers of electrode sheets 222 to the positive and negative poles of a power source can adsorb ions in the raw water passing through water passage 2201, achieving the purpose of raw water purification. Because adsorption layers 2222 are provided on both sides of the current collector layer 2221 of each electrode sheet 222, both sides of each electrode sheet 222 can adsorb ions, thereby ensuring a certain degree of raw water purification. The capacitive deionization filter element 2 can effectively remove heavy metal ions from water, retaining beneficial ions required by the human body, and meeting the needs of household water purification.

[0113] In some embodiments, as Figure 10 As shown, in order to ensure the purification effect of raw water, two adjacent layers of electrode sheets 222 are arranged relative to each other along the stacking direction to ensure the coverage range of the electric field between the two adjacent layers of 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 layers of electrode sheets 222.

[0114] Furthermore, by staggering the insulating sheets 221 and the electrode sheets 222 along the stacking direction, the electrode sheets 222 are hidden between two adjacent layers of insulating sheets 221. This design not only ensures electrical isolation between two adjacent layers of electrode sheets 222, but also facilitates positioning the water outlet end of the electrode assembly 22 opposite the water holes 212 and / or the guide grooves 214 on the peripheral wall of the central column 21, thereby ensuring fluid flow through the water passage 2201 in the electrode assembly 22 and the water outlet passage 211 in the central column 21. The stacking direction is along the thickness of the insulating sheets 221 or the electrode sheets 222.

[0115] In some embodiments, as Figure 9 and Figure 11As shown, in order to facilitate the connection of two adjacent electrode sheets 222 to the positive and negative poles of the power supply, the electrode assembly 22 also 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 sheet; the negative electrode tab 202 is electrically connected to the current collector layer 2221 of the negative electrode sheet.

[0116] Specifically, a first extension portion is provided on one side of the current collector layer 2221 of each positive electrode sheet, and a second extension portion is provided on one side of the current collector layer 2221 of each negative electrode sheet; when the electrode assembly 22 is wound around the peripheral wall of the central column 21, the first extension portions of each positive electrode sheet are stacked to form a positive electrode tab 201, and the second extension portions of each negative electrode sheet are stacked to form a negative electrode tab 202.

[0117] In some embodiments, the current collector layer 2221 includes 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 electrode or the negative electrode of the power source.

[0118] The adsorption layer 2222 is attached to the surface of the current collector layer 2221 . The adsorption layer 2222 includes an activated carbon layer. The activated carbon layer has excellent adsorption properties and can adsorb ions in the raw water.

[0119] In some embodiments, since the thickness of the current collector layer 2221 of the electrode sheet 222 determines the supporting 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, so the thickness of the current collector layer 2221 is set to 15-50 microns; optionally, the thickness of the current collector layer 2221 is specifically 25 microns, 30 microns, 35 microns, 40 microns, 45 microns, 50 microns, etc.

[0120] At the same time, since the thickness of the adsorption layer 2222 of the electrode sheet 222 determines the adsorption capacity and adsorption speed, however, if the adsorption layer 2222 is too thick, the adsorption layer 2222 may crack during winding, so the thickness of the adsorption layer 2222 is set to 25-200 microns; optionally, the thickness of the adsorption layer 2222 is specifically 25 microns, 30 microns, 50 microns, 65 microns, 100 microns, 150 microns, 185 microns, 200 microns, etc.

[0121] In some embodiments, the insulating sheet 221 may be configured as a porous structure, for example, the insulating sheet 221 includes an insulating woven fabric or an insulating mesh. The insulating woven fabric may be a woven fabric or a melt-blown fabric.

[0122] In this way, although the insulating sheet 221 is arranged in the water channel 2201, since the insulating sheet 221 is 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 body by the adsorption layer 2222 of the electrode sheet 222. The insulating sheet 221 will ensure the uniform flow of water in the water channel 2201, and can ensure the adsorption effect of the adsorption layer 2222 on ions to a certain extent.

[0123] In some embodiments, considering that the greater the thickness of the insulating sheet 221, the smaller the water flow pressure loss and the lower the blockage risk, however, the greater the thickness of the insulating sheet 221, the greater the distance between two adjacent electrode sheets 222, and thus the greater the resistance between two adjacent electrode sheets 222, resulting in worse water purification performance. Therefore, in order to comprehensively consider the pressure loss and water purification effect, the thickness of the insulating sheet 221 is set to 0.1-1.0 mm; optionally, the thickness of the insulating sheet 221 is specifically set to 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, etc.

[0124] In some embodiments, as Figure 1 、 Figure 2 and Figure 3 As shown, the water purification assembly further includes: a housing 1 having a water inlet port 101 and a water outlet port 102, wherein the water inlet port 101 and the water outlet port 102 are located at a first end of the housing 1;

[0125] The pre-filter element 6 and the capacitor deionizing filter element 2 are disposed within the housing 1, with a gap being left between the peripheral wall of the pre-filter element 6 and the inner wall of the housing 1; a water outlet space 111 and a receiving space 112, which are isolated from each other, are formed between the first end of the capacitor deionizing filter element 2 and the inner wall of the first end of the housing 1, with the receiving space 112 being located outside the water outlet space 111; the second end cap 4 abuts against the inner wall of the second end of the housing 1;

[0126] Among them, the water inlet port 101 is connected to the gap, and the water outlet 213, the water outlet space 111 and the water outlet port 102 are connected in sequence; the positive pole ear 201 and the negative pole ear 202 of the capacitor deionization filter element 2 both extend into the accommodating space 112, and the positive pole ear 201 and the negative pole ear 202 are arranged at intervals and are suitable for connection to an external power supply.

[0127] It is understood that the housing 1 is cylindrical and has a receiving chamber therein. The composite filter element formed by the pre-filter element 6 and the capacitive deionizing filter element 2 is installed in the receiving chamber and is configured to be coaxial with the housing 1. The water inlet port 101 and the water outlet port 102 are respectively located at the first end of the housing 1 and communicate with the receiving chamber.

[0128] With the cooperation of the first end cap 3, a mutually isolated water outlet space 111 and a receiving space 112 are formed between the first end of the capacitor deionization filter element 2 and the inner wall of the first end of the housing 1. Since the positive electrode tab 201 and the negative electrode tab 202 of the capacitor deionization filter element 2 are arranged in the receiving space 112, and the water outlet 213 of the capacitor deionization filter element 2 is arranged in the water outlet space 111, this design based on the isolated water outlet space 111 and the receiving 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.

[0129] The housing 112 may include a power connection assembly 5, which includes a positive terminal 51 and a negative terminal 52. At least a portion of the positive terminal 51 and at least a portion of the negative terminal 52 are exposed outside the housing 1. The positive terminal 51 is electrically connected to the positive tab 201 of the electrode assembly 22, and the negative terminal 52 is electrically connected to the negative tab 202 of the electrode assembly 22. This design facilitates application of voltage from an external power source to the positive and negative electrode sheets via the power connection assembly 5.

[0130] In some embodiments, as Figure 2 and Figure 3 As shown, the inner wall of the first end of the shell 1 is provided with a first partition 121 and a second partition 122, and the first end cover 3 has a central hole for accommodating the positive electrode tab 201, the negative electrode tab 202 and the water outlet 213;

[0131] The second partition 122 is located outside the first partition 121. A water outlet space 111 is formed between the first partition 121 and the first end of the capacitor deionization filter element 2. A accommodating space 112 is formed between the first partition 121, the second partition 122 and the first end of the capacitor deionization filter element 2.

[0132] It is understood that the first partition 121 and the second partition 122 are respectively disposed on the inner wall of the first end of the housing 1, the water outlet port 102 is disposed at the center of the first end of the housing 1, and the first partition 121 and the second partition 122 extend circumferentially relative to the water outlet port 102 to form a ring shape. Since the second partition 122 is located outside the first partition 121, the accommodating space 112 is located outside the water outlet space 111.

[0133] In actual application, it is only necessary to place the first end of the capacitor deionization filter element 2 against the inner wall of the first end of the shell 1, and based on the first partition 121 and the second partition 122, a water outlet space 111 and a receiving space 112 can be formed between the first end of the capacitor deionization filter element 2 and the first end of the shell 1.

[0134] In some embodiments, as Figure 2 and Figure 6As shown, the first end cover 3 includes a first side wall 31 and a first cover body 32 connected by bending, a center hole is provided in the first cover body 32, and the first side wall 31 is provided to extend circumferentially relative to the center hole;

[0135] The outer side surface of the first side wall 31 is sealed to the inner side surface of the second partition 122, and the first cover 32 is sealed to the first end of the pre-filter element 6 and the capacitor deionization filter element 2 respectively through filling glue;

[0136] The positive electrode tab 201 and the negative electrode tab 202 are located in the area enclosed by the first side wall 31 and the first separator 121 .

[0137] It is understood that the first cover 32 is disc-shaped, with a central hole of the first cover 32 coaxially disposed with the water outlet port 102, and the first sidewall 31 extending circumferentially relative to the central hole. The filler may be an epoxy resin, forming a sealant layer at the first end of the composite filter element formed by the pre-filter element 6 and the capacitive deionizing filter element 2.

[0138] In order to ensure the sealing effect of the first end of the composite filter element formed by the pre-filter element 6 and the capacitor deionization filter element 2, a second support rib is provided on the side of the first cover body 32 facing the capacitor deionization filter element 2. The second support rib can be configured to extend radially along the capacitor deionization filter element 2. The second support rib is used to ensure the thickness of the filling glue filled at the first end of the composite filter element, and is conducive to ensuring the molding quality of the filling glue.

[0139] When the first end of the capacitor deionizing filter element 2 abuts against the inner wall of the first end of the shell 1, the outer side surface of the first side wall 31 is sealedly connected to the inner side surface of the second partition 122, and a closed accommodating space 112 is formed between the first side wall 31, the first partition 121 and the first end of the capacitor deionizing filter element 2. Waterproof isolation of the positive electrode tab 201 and the negative electrode tab 202 can be achieved based on the accommodating space 112.

[0140] At the same time, the peripheral wall of the water outlet 213 (for example, the peripheral wall of the first end of the center column 21) and the inner side surface of the first partition 121 can also be configured to be sealed and connected. This design ensures that the water output from the water outlet 213 is directly discharged from the water outlet port 102 after entering the water outlet space 111, and the water in the water outlet space 111 will not flow into the accommodating space 112.

[0141] In some embodiments, as Figure 2 and Figure 6 As shown, the first end cap 3 further includes a second adhesive retaining wall 33, which is bent and connected to the first cover body 32. The second adhesive retaining wall 33 is disposed outside the peripheral wall of the pre-filter element 6. For example, the inner side of the second adhesive retaining wall 33 is in contact with the peripheral wall of the pre-filter element 6. Of course, the inner side of the second adhesive retaining wall 33 and the peripheral wall of the pre-filter element 6 can also be spaced apart.

[0142] It is understood that the second rubber retaining wall 33 is provided along the outer edge of the first cover 32 and extends circumferentially relative to the water outlet port 102. The inner diameter of the second rubber retaining wall 33 is adapted to the outer diameter of the pre-filter element 6. The second rubber retaining wall 33 not only prevents the filling rubber at the first end of the composite filter element from overflowing onto the peripheral wall of the pre-filter element 6, but also, in conjunction with the second end cap 4, ensures that the pre-filter element 6 and the capacitor deionizing filter element 2 remain coaxially distributed, thereby maintaining a stable water flow gap between the pre-filter element 6 and the capacitor deionizing filter element 2, thereby ensuring the water purification effect of the water purification assembly.

[0143] In addition, in order to ensure the molding quality of the filling glue, a stop rib is provided on the side of the first cover body 32 facing the capacitor deionization filter element 2. The stop rib is arranged on the inner edge of the first cover body 32 and extends circumferentially relative to the center hole. The stop rib is used to limit the flow of the filling glue toward the area where the center hole is located.

[0144] In actual application, a layer of filling glue is first set in the first area of ​​the first end of the composite filter element, and the first area and the first cover body 32 are arranged opposite to each other along the axial direction of the center column 21; then, the first end cover 3 is set on the first end of the composite filter element, and the second glue blocking wall 33 is fitted with the peripheral wall of the pre-filter element 6 to prevent the filling glue from overflowing to the outer side of the pre-filter element 6; then, a layer of filling glue is set in the second area of ​​the first end of the composite filter element, and the second area corresponds to the area where the center hole on the first cover body 32 is located, thereby completing the sealing of the first end of the composite filter element.

[0145] In a second aspect, an embodiment of the present invention further provides a water purification device, comprising: a body and the water purification component as described above; the body has an installation cavity, and the water purification component is detachably arranged in the installation cavity.

[0146] Specifically, the water purification device can be an instant hot water dispenser, and the body can be provided with an installation port communicating with the installation cavity, and the capacitor deionization filter element 2 can be inserted into the installation cavity through the installation port.

[0147] Since the water purification equipment includes a water purification component, the specific structure of the water purification component refers to the above embodiment, and the water purification equipment of this embodiment includes all the technical solutions of the above embodiment, and therefore has at least all the beneficial effects achieved by all the technical solutions of the above embodiment, which will not be repeated here.

[0148] Finally, it should be noted that the above embodiments are intended only to illustrate the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, or equivalent substitutions of the technical solutions of the present invention do not depart from the spirit and scope of the technical solutions of the present invention and are intended to be encompassed by the claims of the present invention.

Claims

1. A water purification component, characterized in that: include: A pre-filter element (6) and a capacitor deionizing filter element (2), wherein the pre-filter element (6) is sleeved on the outside of the capacitor deionizing filter element (2), and the pre-filter element (6) and the capacitor deionizing filter element (2) are separated from each other to form a water-passing gap between the inner wall of the pre-filter element (6) and the peripheral wall of the capacitor deionizing filter element (2); a first end cap (3) and a second end cap (4), wherein the first end cap (3) is sealedly connected to the first end of the pre-filter element (6) and the capacitor deionizing filter element (2), respectively, and the second end cap (4) is sealedly connected to the second end of the pre-filter element (6) and the capacitor deionizing filter element (2), respectively; The first end of the capacitor deionizing filter element (2) is provided with a water outlet (213), and water can sequentially pass through the pre-filter element (6), the water gap, and the capacitor deionizing filter element (2), and then be discharged from the water outlet (213); Wherein, the gap width of the water gap is not less than 0.3 mm.

2. The water purification assembly according to claim 1, characterized in that: The pre-filter element (6) and the capacitive deionizing filter element (2) are coaxially arranged.

3. The water purification assembly according to claim 2, characterized in that: The second end cover (4) comprises: a first adhesive stop wall (42) and a second cover body (41) connected by bending; a first positioning portion (410) is provided at the center of the second cover body (41); the first adhesive stop wall (42) is circumferentially extended relative to the first positioning portion (410); A second positioning portion (20) is provided at the center of the second end of the capacitor deionizing filter element (2), and the first positioning portion (410) is connected to the second positioning portion (20); the second cover (41) is sealedly connected to the pre-filter element (6) and the second end of the capacitor deionizing filter element (2) respectively through filling glue, and the first glue retaining wall (42) is sleeved on the peripheral wall of the pre-filter element (6).

4. The water purification assembly according to claim 3, characterized in that: The first positioning portion (410) comprises a positioning protrusion, and the second positioning portion (20) comprises a positioning groove, wherein the positioning protrusion is inserted into the positioning groove.

5. The water purification assembly according to claim 3, characterized in that: The inner wall surface of the first glue retaining wall (42) is provided with a plurality of first positioning ribs (420), the plurality of first positioning ribs (420) being arranged circumferentially relative to the first positioning portion (410), and each first positioning rib (420) extending along the axial direction of the capacitor deionization filter element (2); each first positioning rib (420) is used to contact the circumferential wall of the pre-filter element (6).

6. The water purification assembly according to claim 3, characterized in that: The second cover (41) is further provided with a second positioning rib, which extends circumferentially relative to the first positioning portion (410), and is embedded between the inner wall of the pre-filter element (6) and the peripheral wall of the capacitor deionization filter element (2).

7. The water purification assembly according to any one of claims 1 to 6, characterized in that: The pre-filter element (6) includes any one of a PP cotton filter element, a carbon rod filter element or a carbon fiber filter element; Alternatively, the pre-filter element (6) includes multiple layers of filter elements, and the multiple layers of filter elements are sequentially sleeved together from the inside out, and each layer of the filter element includes any one of a PP cotton filter element, a carbon rod filter element, or a carbon fiber filter element.

8. The water purification assembly according to any one of claims 1 to 6, characterized in that: The capacitive deionization filter element (2) comprises: a central column (21) and an electrode assembly (22); The electrode assembly (22) is wound around the peripheral wall of the central column (21), and the water gap is formed between the inner wall of the pre-filter element (6) and the peripheral wall of the electrode assembly (22); the first end cap (3) is sealed to the first end of the electrode assembly (22), and the second end cap (4) is sealed to the second end of the electrode assembly (22); The central column (21) has a water outlet channel (211), a water hole (212) and the water outlet (213) connected to the water outlet channel (211); the water outlet channel (211) is provided in the central column (21); the water outlet (213) is provided at a first end of the central column (21); and the water hole (212) is provided on a peripheral wall close to a second end of the central column (21).

9. The water purification assembly according to claim 8, characterized in that: A guide groove (214) is provided on the peripheral wall of the central column (21), and fluid communication is formed between the guide groove (214) and the water hole (212).

10. The water purification assembly according to claim 8, characterized in that: The electrode assembly (22) comprises: an insulating sheet (221) and at least two layers of electrode sheets (222), the insulating sheet (221) and the electrode sheets (222) being stacked, and the insulating sheet (221) being sandwiched between two adjacent layers of the electrode sheets (222); The electrode sheet (222) comprises a current collector layer (2221) and an adsorption layer (2222), and the adsorption layer (2222) is provided on both the front and back sides of the current collector layer (2221); two adjacent layers of the 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 inner and outer ends of the electrode assembly (22) relative to the central column (21) are formed as a water outlet and a water inlet, respectively; the water inlet is connected to the water outlet through the water passage (2201), and the water outlet extends toward the peripheral wall of the central column (21) and forms a fluid connection with the water hole (212).

11. The water purification assembly according to any one of claims 1 to 6, characterized in that: Also includes: A housing (1) having a water inlet port (101) and a water outlet port (102), wherein the water inlet port (101) and the water outlet port (102) are located at a first end of the housing (1); The pre-filter element (6) and the capacitor deionizing filter element (2) are arranged in the housing (1), and a gap is left between the peripheral wall of the pre-filter element (6) and the inner wall of the housing (1); a water outlet space (111) and a receiving space (112) isolated from each other are formed between the first end of the capacitor deionizing filter element (2) and the inner wall of the first end of the housing (1), and the receiving space (112) is located outside the water outlet space (111); the second end cover (4) is in contact with the inner wall of the second end of the housing (1); The water inlet port (101) is connected to the gap, and the water outlet (213), the water outlet space (111) and the water outlet port (102) are connected in sequence; the positive electrode tab (201) and the negative electrode tab (202) of the capacitor deionization filter element (2) both extend into the accommodating space (112), and the positive electrode tab (201) and the negative electrode tab (202) are spaced apart and suitable for connection to an external power supply.

12. The water purification assembly according to claim 11, characterized in that: The inner wall of the first end of the shell (1) is provided with a first partition (121) and a second partition (122); the first end cover (3) has a central hole, and the central hole is used to accommodate the positive electrode tab (201), the negative electrode tab (202) and the water outlet (213); The second partition (122) is located outside the first partition (121); the first partition (121) and the first end of the capacitor deionizing filter element (2) enclose the water outlet space (111); and the first partition (121), the second partition (122) and the first end of the capacitor deionizing filter element (2) enclose the accommodating space (112).

13. The water purification assembly according to claim 12, characterized in that: The first end cover (3) comprises a first side wall (31) and a first cover body (32) connected by bending, the center hole is provided in the first cover body (32), and the first side wall (31) is provided to extend circumferentially relative to the center hole; The outer side surface of the first side wall (31) is sealed to the inner side surface of the second partition (122), and the first cover (32) is sealed to the first ends of the pre-filter element (6) and the capacitor deionization filter element (2) respectively through filling glue; The positive electrode tab (201) and the negative electrode tab (202) are located in an area enclosed by the first side wall (31) and the first separator (121).

14. The water purification assembly according to claim 13, characterized in that: The first end cover (3) further comprises: a second rubber retaining wall (33), the second rubber retaining wall (33) being bent and connected to the first cover body (32), and the second rubber retaining wall (33) being arranged on the outside of the peripheral wall of the pre-filter element (6).

15. A water purification device, characterized in that: include: A machine body and a water purification component as described in any one of claims 1 to 14; the machine body has an installation cavity, and the water purification component is detachably arranged in the installation cavity.

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