Water purifying assembly and water purifying device

Abstract

The present application relates to water purification technical field, provide a kind of water purification assembly and water purification equipment.The water purification assembly includes: shell, front filter element, capacitive deionization filter element, rear filter element and reversing valve;Shell has accommodating cavity and with accommodating cavity communication inlet port, outlet port and waste water outlet;Front filter element, capacitive deionization filter element and rear filter element are respectively arranged in accommodating cavity, inlet port, front filter element and capacitive deionization filter element sequentially form fluid communication, and fluid communication is formed between rear filter element and outlet port;Reversing valve has first state and second state, when reversing valve is in first state, reversing valve controls the flow direction of the purified water output by capacitive deionization filter element to rear filter element;When reversing valve is in second state, reversing valve controls the flow direction of the waste water output by capacitive deionization filter element to waste water outlet.The present application realizes the integrated design of water purification assembly, and the space occupied is small, and the switching between purified water outlet mode and waste water outlet mode can be conveniently carried out.

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 theory of double-layer capacitance. 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.

[0003] In related technologies, capacitive deionization filter cartridges are usually combined with other filter cartridges used for physical filtration to ensure water purification effect. However, since each filter cartridge is used independently, the water purification components formed by this combination are not only complex in terms of water circuit and occupy a large space, but also cannot easily switch between different water output modes. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes a water purification component that integrates a pre-filter, a capacitive deionization filter, and a post-filter into one unit, occupying little space, simplifying the water circuit structure of existing water purification components, and enabling convenient switching between purified water output mode and wastewater output mode.

[0005] This invention also proposes a water purification device.

[0006] A water purification assembly according to a first aspect of the present invention includes:

[0007] The housing has a receiving cavity and an inlet port, an outlet port and a wastewater outlet communicating with the receiving cavity;

[0008] A pre-filter, a capacitor deionization filter, and a post-filter are respectively disposed in the accommodating cavity. The water inlet port, the pre-filter, and the capacitor deionization filter are sequentially connected in fluid communication, and the post-filter and the water outlet port are connected in fluid communication.

[0009] The reversing valve has a first state and a second state, and the capacitor deionization filter element is connected to the post-filter element and the wastewater outlet respectively through the reversing valve;

[0010] When the reversing valve is in the first state, the reversing valve is used to control the flow of purified water output from the capacitor deionization filter to the post-filter; when the reversing valve is in the second state, the reversing valve is used to control the flow of wastewater output from the capacitor deionization filter to the wastewater outlet.

[0011] According to one embodiment of the present invention, the pre-filter is sleeved on the outside of the capacitive deionization filter, and the capacitive deionization filter and the post-filter are coaxially arranged.

[0012] The post-filter includes a housing and a filter body, the filter body is disposed inside the housing, a water passage space is formed between the filter body and the housing, and a water outlet channel is provided inside the filter body;

[0013] The first port of the reversing valve is connected to the water outlet of the capacitor deionization filter element, the second port of the reversing valve is connected to the water passage, the third port of the reversing valve is connected to one end of the water outlet channel, and the other end of the water outlet channel is connected to the water outlet port.

[0014] Specifically, when the reversing valve is in the first state, the first port and the second port of the reversing valve are connected; when the reversing valve is in the second state, the first port and the third port of the reversing valve are connected, and the outlet port is used as the wastewater outlet.

[0015] According to one embodiment of the present invention, the capacitive deionization filter element comprises:

[0016] An electrode assembly, wound into a cylindrical shape, 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;

[0017] 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.

[0018] According to an embodiment of the present invention, the capacitive deionization filter element further includes: a central column having a water outlet channel and a water passage hole communicating with the water outlet channel, the water outlet channel being disposed inside the central column, and the water passage hole being disposed on the peripheral wall of the central column;

[0019] The electrode assembly is wound around the peripheral wall of the central column, and the two ends of the electrode assembly along the axial direction of the central column are sealed. The inner and outer ends of the electrode assembly relative to the central column are respectively formed as the water outlet and the water inlet.

[0020] 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 fluid communication with the water passage hole.

[0021] According to one embodiment of the present invention, the central column has an outlet communicating with the water outlet channel. The outlet is located at the first end of the central column and is configured to communicate with the post-filter and the wastewater outlet respectively through the reversing valve. The water passage hole is located on the peripheral wall near the second end of the central column.

[0022] According to one embodiment of the present invention, the peripheral wall of the central column is provided with a flow guide groove, and the flow guide groove and the water passage hole are in fluid communication;

[0023] One end of the guide channel is located on the peripheral wall near the first end of the central column, and the other end is located on the peripheral wall near the second end of the central column.

[0024] According to one embodiment of the present invention, two adjacent electrode sheets are arranged opposite each other along the stacking direction, and the insulating sheet and the electrode sheets are staggered along the stacking direction so that the electrode sheets are hidden between two adjacent insulating sheets.

[0025] According to one embodiment of the present invention, the capacitive deionization filter further includes: a power connection component, including a positive terminal and a negative terminal, the positive terminal and the negative terminal being used for connection to an external power source;

[0026] The capacitor deionization filter element has a positive electrode tab and a negative electrode tab at one end away from the post-filter element. The positive terminal is connected to the positive electrode plate through the positive electrode tab, and the negative terminal is connected to the negative electrode plate through the negative electrode tab.

[0027] According to one embodiment of the present invention, the water purification component further includes:

[0028] A flow regulating valve is located at the outlet end of the capacitor deionization filter element and is used to regulate the flow rate of purified water or wastewater output by the capacitor deionization filter element.

[0029] According to one embodiment of the present invention, the water purification component further includes:

[0030] A first TDS sensor is installed at the water inlet port to detect the TDS value of the water entering through the water inlet port;

[0031] And / or, a second TDS sensor, located between the reversing valve and the post-filter, is used to detect the TDS value of the purified water output by the capacitive deionization filter.

[0032] And / or, a third TDS sensor, located between the reversing valve and the wastewater outlet, is used to detect the TDS value of the wastewater output from the capacitive deionization filter.

[0033] 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.

[0034] According to one embodiment of the present invention, the water purification device further includes:

[0035] A flow meter is used to collect the outflow rate of the water at the outlet port;

[0036] A flow regulating valve is located at the outlet end of the capacitor deionization filter element.

[0037] The control module is connected to the flow meter, the flow regulating valve and the reversing valve respectively;

[0038] The control module is used to control the opening degree of the flow regulating valve according to the water flow rate, and to determine the water output of the water outlet port according to the water flow rate and the water output area of ​​the water outlet port. When the water output is greater than the preset water output, the module controls the reversing valve to switch from the first state to the second state.

[0039] According to one embodiment of the present invention, the water purification device further includes:

[0040] The human-computer interaction module is used to receive the user's first and second commands;

[0041] The control module is connected to the human-machine interaction module and the reversing valve respectively. The control module is used to control the reversing valve to switch to a first state in response to the first command, and to control the reversing valve to switch to a second state in response to the second command.

[0042] According to one embodiment of the present invention, the water purification device further includes:

[0043] A sterilization component is installed on the pipeline between the water outlet port and the water outlet of the water purification equipment. The sterilization component is used to sterilize the purified water output from the water outlet port.

[0044] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0045] By installing a pre-filter, a capacitive deionization filter, and a post-filter within the housing, and configuring a receiving cavity with an inlet port, an outlet port, and a wastewater outlet connected to the receiving cavity, raw water enters the receiving cavity through the inlet port, first undergoes filtration treatment by the pre-filter, and then enters the capacitive deionization filter. When the capacitive deionization filter is operating in desalination mode, it desalinates the received water before passing through a reversing valve to the post-filter, which further filters the purified water output from the capacitive deionization filter, thus achieving water output in purified water output mode. When the capacitive deionization filter is operating in regeneration mode, the ions adsorbed during desalination automatically detach and are discharged from the wastewater outlet along with the received water, thus achieving water output in wastewater output mode.

[0046] As can be seen from the above, the water purification component shown in this invention integrates the pre-filter, the capacitor deionization filter, and the post-filter into one unit, which occupies little space, simplifies the water circuit structure of existing water purification components, and can conveniently switch between purified water output mode and wastewater output mode.

[0047] 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

[0048] To more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0049] Figure 1 This is a schematic diagram of the water circuit structure of the water purification equipment provided in an embodiment of the present invention;

[0050] Figure 2 This is a schematic diagram of the structure of the water purification component provided in an embodiment of the present invention;

[0051] Figure 3 This is provided by the embodiments of the present invention. Figure 2 One of the cross-sectional schematic diagrams of the water purification components shown;

[0052] Figure 4 This is provided by the embodiments of the present invention. Figure 2 The second cross-sectional view of the water purification components shown;

[0053] Figure 5 This is provided by the embodiments of the present invention. Figure 3The diagram shown is a structural schematic of the water purification component without its housing.

[0054] Figure 6 This is a schematic diagram of the structure of the capacitor deionization filter element provided in the embodiment of the present invention;

[0055] Figure 7 This is one of the structural schematic diagrams of the central column provided in the embodiments of the present invention;

[0056] Figure 8 This is a second schematic diagram of the structure of the central column provided in an embodiment of the present invention;

[0057] Figure 9 This is a schematic diagram of the structure of the electrode assembly provided in an embodiment of the present invention, which is wound around the peripheral wall of the central column;

[0058] Figure 10 This is a schematic diagram of the structure of the first end cap provided in an embodiment of the present invention;

[0059] Figure 11 This is a cross-sectional schematic diagram of the electrode assembly stacking configuration provided in an embodiment of the present invention;

[0060] Figure 12 This is a cross-sectional schematic diagram of the electrode sheet provided in an embodiment of the present invention;

[0061] Figure label:

[0062] 1. Shell; 101. Inlet port; 102. Outlet port; 111. Outlet space; 112. Accommodation space; 121. Partition;

[0063] 2. Capacitive deionization filter element; 21. Central column; 22. Electrode assembly; 211. Water outlet channel; 212. Water passage hole; 213. Water outlet; 214. Flow guide groove; 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;

[0064] 3. First end cap; 31. First side wall; 32. First cover body; 33. First adhesive barrier wall;

[0065] 4. Second end cap; 41. Second cover body; 42. Second adhesive barrier wall; 43. Second side wall;

[0066] 5. Power connection assembly; 51. Positive terminal; 52. Negative terminal;

[0067] 10. Switch valve; 20. Pre-filter element; 30. Flow regulating valve; 40. Reversing valve; 50. Post-filter element; 501. Housing; 502. Filter element body; 5001. Outlet channel; 60. Flow meter; 70. Sterilization component; 100. First TDS sensor; 200. Second TDS sensor; 300. Third TDS sensor. Detailed Implementation

[0068] 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.

[0069] 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 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] The following is combined with Figures 1-12 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.

[0074] In the first aspect, such as Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a water purification component, including: a housing 1, a pre-filter 20, a capacitor deionization filter 2, a post-filter 50, and a reversing valve 40;

[0075] The housing 1 has a receiving cavity and an inlet port 101, an outlet port 102 and a wastewater outlet communicating with the receiving cavity;

[0076] The pre-filter 20, the capacitor deionization filter 2, and the post-filter 50 are respectively disposed in the receiving cavity. The inlet port 101, the pre-filter 20, and the capacitor deionization filter 2 are sequentially connected in fluid communication, and the post-filter 50 and the outlet port 102 are connected in fluid communication.

[0077] The reversing valve 40 has a first state and a second state. The capacitor deionization filter 2 is connected to the post-filter 50 and the wastewater outlet through the reversing valve 40, respectively.

[0078] When the reversing valve 40 is in the first state, the reversing valve 40 is used to control the flow of purified water output from the capacitor deionization filter 2 to the post-filter 50; when the reversing valve 40 is in the second state, the reversing valve 40 is used to control the flow of wastewater output from the capacitor deionization filter 2 to the wastewater outlet.

[0079] Understandably, the pre-filter 20 is used for physical filtration of impurities in the water. Depending on the material used, the pre-filter 20 can be any of the following: PP cotton filter, carbon rod filter, or carbon fiber filter. The pre-filter 20 can also consist of multiple layers, nested together from the inside out. Each layer includes any of the following: PP cotton filter, carbon rod filter, or carbon fiber filter. Adjacent layers may have different types. For example, when the pre-filter 20 has two layers, the outermost layer may be a PP cotton filter, and the innermost layer may be a carbon rod filter or a carbon fiber filter.

[0080] The capacitive deionization filter element 2 can be configured in a columnar shape. The capacitive deionization filter element 2 has an inlet end and an outlet end. The inlet end of the capacitive deionization filter element 2 is used to receive the water output from the pre-filter element 20. When the capacitive deionization filter element 2 is working in the desalination state, the outlet end of the capacitive deionization filter element 2 is used to output the purified water after desalination treatment. When the capacitive deionization filter element 2 is working in the regeneration state, the outlet end of the capacitive deionization filter element 2 is used to output wastewater.

[0081] Specifically, the capacitive deionization filter element 2 typically includes an electrode assembly 22, which includes a stacked positive electrode and a negative electrode. The positive and negative electrode are isolated from each other, and a flow channel for water flow is formed between them. When a positive voltage is applied to the positive and negative electrode, the capacitive deionization filter element 2 operates in a desalination state. Cations, anions, or charged particles in the water migrate to the surface of the positive and negative electrode under the action of the electric field, and the electrode assembly 22 outputs desalinated purified water. When a reverse voltage is applied to the positive and negative electrode, the capacitive deionization filter element 2 operates in a regeneration state. The anions, cations, or charged particles adsorbed on the surface of the positive and negative electrode automatically detach, and the electrode assembly 22 outputs wastewater with a higher concentration.

[0082] The post-filter 50 is used to perform physical filtration again on the desalinated purified water output from the capacitor deionization filter 2; depending on the material used in the post-filter 50, the post-filter 50 can be any of the following: carbon rod filter or carbon fiber filter.

[0083] The reversing valve 40 can be a two-position three-way solenoid reversing valve 40. The reversing valve 40 can be configured to be electrically connected to a control module or electronic control unit, and the control module or electronic control unit controls the reversing valve 40 to switch between a first state and a second state. Specifically, when the capacitive deion filter element 2 is working in the desalination state, the reversing valve 40 is in the first state; when the capacitive deion filter element 2 is working in the regeneration state, the reversing valve 40 is in the second state.

[0084] As can be seen from the above, by setting a pre-filter 20, a capacitive deionization filter 2, and a post-filter 50 in the housing 1, and configuring a receiving cavity in the housing 1 and an inlet port 101, an outlet port 102, and a wastewater outlet connected to the receiving cavity, the raw water enters the receiving cavity through the inlet port 101, first passes through the pre-filter 20 for filtration, and then enters the capacitive deionization filter 2. When the capacitive deionization filter 2 is working in the desalination state, it desalinates the received water, and then enters the post-filter 50 through the reversing valve 40. The post-filter 50 then filters the purified water output by the capacitive deionization filter 2 again, realizing the water purification component in the purified water output mode. When the capacitive deionization filter 2 is working in the regeneration state, the ions adsorbed by the capacitive deionization filter 2 in the desalination state are automatically released and discharged from the wastewater outlet along with the received water, realizing the water purification component in the wastewater output mode.

[0085] Therefore, the water purification component shown in this invention integrates the pre-filter 20, the capacitor deionization filter 2, and the post-filter 50 into one unit, which occupies little space, simplifies the water circuit structure of existing water purification components, and can conveniently switch between purified water output mode and wastewater output mode.

[0086] In some embodiments, such as Figure 3 and Figure 4 As shown, the pre-filter 20 is sleeved on the outside of the capacitor deion filter 2, and the capacitor deion filter 2 and the post-filter 50 are coaxially arranged; the post-filter 50 includes a shell 501 and a filter body 502, the filter body 502 is disposed inside the shell 501, a water passage space is formed between the filter body 502 and the shell 501, and a water outlet channel 5001 is provided inside the filter body 502;

[0087] The first port of the reversing valve 40 is connected to the water outlet of the capacitor deion filter 2, the second port of the reversing valve 40 is connected to the water passage space, the third port of the reversing valve 40 is connected to one end of the water outlet channel 5001, and the other end of the water outlet channel 5001 is connected to the water outlet port 102.

[0088] When the reversing valve 40 is in the first state, the first port and the second port of the reversing valve 40 are connected; when the reversing valve 40 is in the second state, the first port and the third port of the reversing valve 40 are connected, and the outlet port 102 is used as a wastewater outlet.

[0089] It is understandable that the pre-filter 20 is cylindrical and the capacitive deionization filter 2 is cylindrical. When the pre-filter 20 is sleeved on the outside of the capacitive deionization filter 2, the pre-filter 20 and the capacitive deionization filter 2 can be configured to be coaxial or non-coaxial, and there is no specific limitation on this.

[0090] When the pre-filter 20, the capacitor deionization filter 2, and the post-filter 50 are arranged inside the housing 1, the pre-filter 20 is sleeved on the outside of the capacitor deionization filter 2 to form a composite filter. The first end of the composite filter abuts against the inner wall of the first end of the housing 1, the second end of the composite filter abuts against the first end of the post-filter 50, and the second end of the post-filter 50 abuts against the inner wall of the second end of the housing 1.

[0091] The composite filter element is designed with sealed ends along the axial direction. The outlet end of the capacitor deion filter element 2 extends from the second end of the composite filter element and is connected to the post-filter element 50 through the reversing valve 40.

[0092] Meanwhile, for the post-filter element 50, the filter element body 502 is provided with a water outlet channel 5001 extending along the axial direction of the capacitive deion filter element 2, and both ends of the filter element body 502 along its axial direction are sealed; thus, when the reversing valve 40 is in the first state, the purified water output by the capacitive deion filter element 2 enters the water passage space after passing through the reversing valve 40, and then enters the filter element body 502 from the peripheral wall on the side of the filter element body 502. After filtering the received water, the filter element body 502 outputs purified water from the water outlet channel 5001 and discharges it from the water outlet port 102; when the reversing valve 40 is in the second state, the wastewater output by the capacitive deion filter element 2 enters the water outlet channel 5001 of the filter element body 502 through the reversing valve 40 and is directly discharged from the water outlet port 102.

[0093] In some embodiments, such as Figure 3 , Figure 11 and Figure 12 As shown, the capacitor deionization filter element 2 includes: an electrode assembly 22, wound into a column shape, including 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.

[0094] 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.

[0095] 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.

[0096] 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.

[0097] In some embodiments, the adsorption layer 2222 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. This design can utilize the excellent adsorption properties of activated carbon to adsorb ions in the raw water. The surface of titanium dioxide has many functional groups (carboxyl groups, hydroxyl groups, etc.), which can undergo complexation reactions with heavy metal ions, thereby removing heavy metals from the water through surface complexation.

[0098] Specifically, in activated carbon, heavy metals are mainly removed through pore adsorption. Titanium dioxide, on the other hand, has many functional groups (carboxyl groups, hydroxyl groups, etc.) on its surface that can complex with heavy metal ions, removing heavy metals from water through surface complexation. This combination of complexation and adsorption achieves the desired removal effect. However, titanium dioxide cannot remove other beneficial ions in the raw water; these are removed through the electric double layer of activated carbon and adsorption. Therefore, the retention of beneficial ions can be achieved by regulating the electric field. The inventors discovered that controlling the mass ratio of activated carbon to titanium dioxide to be (5~1):1 not only effectively removes heavy metals from water but also retains beneficial ions, achieving water purification. For example, the mass ratios of activated carbon to titanium dioxide are 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-mentioned range, 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.

[0099] The current collector layer 2221 includes, but is not limited to, copper foil, aluminum foil, stainless steel foil, titanium foil, nickel foil, etc. Conductive agents include, but are not limited to, acetylene black, conductive carbon black, graphite powder, etc. Binders include, but are not limited to, polyurethane, polyvinylidene fluoride, polystyrene, polyacrylate, polytetrafluoroethylene, etc.

[0100] In some embodiments, heavy metals include, but are not limited to, Pb, As, Fe, Cr, and Cu.

[0101] 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~2200 m 2 / g, the average pore size of activated carbon is 1nm~5nm. For example, the particle size of activated carbon is 5μm, 7μm, 9μm, 11μm, 13μm, 15μm, etc., and the specific surface area of ​​activated carbon is 1500 m². 2 / g, 1600 m 2 / g, 1700 m 2 / g, 1800 m 2 / g, 1900 m 2 / g, 2000m 2 / g, 2100 m 2 / g, 2200 m 2 The activated carbon has an average pore size of 1 nm, 2 nm, 3 nm, 4 nm, and 5 nm, etc. The inventors discovered that by controlling the particle size, specific surface area, and average pore size of the activated carbon within the above ranges, the activated carbon can provide more active sites and has a larger adsorption capacity, thus exhibiting excellent ion adsorption performance and heavy metal removal ability. Furthermore, activated carbon can better synergize with titanium dioxide to remove heavy metal ions while retaining a certain amount of beneficial ions.

[0102] 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 2The 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.

[0103] In some embodiments, the conductive agent accounts for 2% to 5% of the total mass of the adsorption layer 2222. For example, the mass percentage can be 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc. This improves the conductivity and electron transport capability of the electrode sheet 222.

[0104] In some embodiments, the binder accounts for 5% to 10% of the total mass of the adsorption layer 2222. For example, the mass percentage can be 5%, 6%, 7%, 8%, 9%, 10%, etc. This improves the contact performance of the various materials in the adsorption layer 2222.

[0105] 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.

[0106] 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.

[0107] Furthermore, based on the total mass of the adsorption layer 2222, the mass percentage of the cellulose-based binder is not less than 1%. For example, the mass percentage of the cellulose-based binder is not less than 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, etc. By controlling the mass percentage of the cellulose-based binder to be not less than 1%, it can be ensured that the binder has a large number of active groups, thereby ensuring a large ion adsorption capacity and improving the ion adsorption effect and ion removal rate of the electrode.

[0108] Furthermore, the binder also includes at least one of styrene-butadiene rubber, polytetrafluoroethylene, and polyvinylidene fluoride. By adding the above-mentioned type of binder, the stability of the adsorption layer 2222 in water is improved, reducing phenomena such as dissolution, detachment, peeling, and cracking of the activated carbon material layer during operation. According to embodiments of the present invention, based on the total mass of the adsorption layer 2222, the mass percentage of the binder is 2% to 15%, preferably 3% to 7%. For example, the mass percentages are 2%, 5%, 7%, 10%, 12%, 15%, etc. The inventors have found that controlling the mass percentage of the binder within the above range can maintain the bonding performance, provide usable selective groups, and ensure the ratio of active ingredients and conductive agents, thus maintaining the total adsorption capacity. In the adsorption layer 2222, the mass ratio of the binder is very small compared to the activated carbon material. Therefore, compared to the existing modification of activated carbon materials, the binder modification used in this application can not only significantly reduce production costs, but also, in terms of adsorption performance, the performance of the electrode sheet 222 prepared by the binder modification in this application is no worse than that of the electrode sheet 222 prepared by the activated carbon material modification. Therefore, this invention provides a new approach to improve the adsorption performance of the electrode sheet 222.

[0109] 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.

[0110] 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.

[0111] In practical applications, the operation of the capacitive deionization filter element 2 includes an adsorption purification process and a desorption regeneration process. When the two adjacent 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 2 is the adsorption purification process.

[0112] Correspondingly, when a reverse voltage is applied to two adjacent electrode plates 222, the ions adsorbed by the adsorption layer 2222 are released into the water body of the water passage 2201, and at this time the water passage 2201 will output concentrated water with a high ion concentration.

[0113] As can be seen from the above, the capacitive deion filter element 2 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 simply 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.

[0114] 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 2 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.

[0115] In some embodiments, such as Figure 3 and Figure 4 As shown, the capacitor deionization filter element 2 also includes: a central column 21, having a water outlet channel 211 and a water passage hole 212 communicating with the water outlet channel 211, the water passage hole 212 being disposed on the peripheral wall of the central column 21;

[0116] Electrode assembly 22 is wound around the peripheral wall of central column 21. Both ends of electrode assembly 22 along the axial direction of central column 21 are sealed. The inner and outer ends of electrode assembly 22 relative to central column 21 are formed as water outlet and water inlet respectively.

[0117] 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 central column 21 and forms a fluid connection with the water passage 212.

[0118] Understandably, such as Figure 9 As shown, during the winding of the electrode assembly 22, the inner side of one end of the electrode assembly 22 contacts the peripheral wall of the central column 21, and then the electrode assembly 22 is wound layer by layer with the central column 21 as the central axis until the electrode assembly 22 is wound into a columnar distribution.

[0119] Since the electrode assembly 22 is wound around the peripheral wall of the central column 21 and the two ends of the electrode assembly 22 along the axial direction of the central column 21 are sealed, when a positive voltage is applied to the positive and negative electrode plates, cations, anions or charged particles in the water will migrate to the surface of the positive and negative electrode plates under the action of the electric field force, so that the inner side of the electrode assembly 22 outputs desalinated water. This water enters the water outlet channel 211 through the water passage 212 and is then discharged along the water outlet channel 211.

[0120] Correspondingly, when a reverse voltage is applied to the positive and negative electrodes, the anions, cations, or charged particles adsorbed on the surfaces of the positive and negative electrodes will automatically detach, thereby outputting a higher concentration of wastewater from the inner side of the electrode assembly 22. This wastewater enters the outlet channel 211 through the water passage 212 and is then discharged along the outlet channel 211.

[0121] The capacitive deionization filter element 2 also includes a protective sleeve, such as a cylindrical membrane. The protective sleeve is fitted onto the peripheral wall of the electrode assembly 22. The protective sleeve has multiple water inlets to ensure that water can reach the outside of the electrode assembly 22 through the water inlets, and then the electrode assembly 22 will desalinate the received water.

[0122] In some embodiments, such as Figure 11 As shown, in order to ensure the purification effect on the raw water, the two adjacent electrode plates 222 are arranged opposite each other along the stacking direction to ensure the coverage of the electric field between the two adjacent electrode plates 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 plates 222.

[0123] 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 water passage hole 212 on the peripheral wall of the water outlet pipe, ensuring that the water passage channel 2201 inside the electrode assembly 22 and the water passage gap inside the water outlet pipe remain unobstructed.

[0124] 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.

[0125] In some embodiments, such as Figure 9 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.

[0126] 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 central post 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] In some embodiments, the insulating sheet 221 may be configured as a porous structure, for example, the insulating sheet 221 may include insulating fabric or insulating mesh. The insulating fabric may be woven fabric or meltblown fabric.

[0132] 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.

[0133] 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 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.

[0134] In some embodiments, such as Figure 3 , Figure 7 and Figure 8 As shown, the central column 21 has an outlet 213 that communicates with the water outlet channel 211. The outlet 213 is located at the first end of the central column 21 and is configured to communicate with the post-filter 50 and the wastewater outlet respectively through the reversing valve 40. The water passage hole 212 is located on the peripheral wall near the second end of the central column 21.

[0135] Understandably, considering that the peripheral wall of the existing central column 21 is usually densely covered with multiple water passage holes 212, the water output from the inner side of the electrode assembly 22 will uniformly pass through each water passage hole 212 into the water outlet channel 211. 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, and the flowing water will not have an effect on the desorption of the air bubbles. However, by setting the water passage 212 on the peripheral wall near the second end of the central column 21, the water passage 212 is located away from the outlet 213. This design limits the water output from the inner side of the electrode assembly 22 to gradually converge towards the area where the water passage 212 is located, and then output through the water passage 212, the water outlet channel 211 and the outlet 213 in sequence. During the water flow, because the water passage 212 is located away from the outlet 213, the flowing water will gradually converge towards the area where the water passage 212 is located. This will gradually squeeze the air bubbles generated in the electrode assembly 22 to the area where the water passage 212 is located, and then enter the water outlet channel 211 from the water passage 212 and be discharged with the water, thereby effectively removing the air bubbles that appear in the capacitor deion filter 2.

[0136] As can be seen from the above, during the desalination process of the capacitor deion filter 2, the air bubbles generated inside the filter can be effectively discharged, which can prevent the capacitor deion filter 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 deion filter 2.

[0137] In some embodiments, such as Figure 3 , Figure 7 and Figure 8As shown, the peripheral wall of the central column 21 is provided with a flow guide groove 214, and a fluid communication is formed between the flow guide groove 214 and the water passage hole 212; one end of the flow guide groove 214 is provided on the peripheral wall near the first end of the central column 21, and the other end is provided on the peripheral wall near the second end of the central column 21.

[0138] Understandably, by setting a flow guide 214 on the peripheral wall of the central column 21, the gap between the inner side of the electrode assembly 22 and the peripheral wall of the central column 21 is too small, which would restrict the flow of water. This makes it easier to collect the purified water output from the inner side of the electrode assembly 22 using the flow guide 214, and then guide the collected purified water to the water passage 212.

[0139] The depth of the guide groove 214 can be set to 2-5mm.

[0140] In some embodiments, such as Figure 7 As shown, since the length of the central column 21 is approximately the same as the axial length of the electrode assembly 22 along the central axis, one end of the guide channel 214 is located on the peripheral wall near the first end of the central column 21, and the other end is located on the peripheral wall near the second end of the central column 21. The guide channel 214 can effectively collect the purified water output from the inner side of the electrode assembly 22 at various positions along the axial direction of the central column 21, ensuring the drainage effect of the purified water.

[0141] The guide groove 214 can be configured to be located on the peripheral wall of the central column 21 along a spiral trajectory or along a straight trajectory, without any specific limitation.

[0142] In some embodiments, such as Figure 7 As shown, the guide channel 214 is configured to extend along the axial direction of the central column 21. This design effectively reduces the flow path of the purified water and also facilitates the processing of the guide channel 214.

[0143] Meanwhile, since the inner and outer ends of the electrode assembly 22 are respectively formed as the water outlet and water inlet ends relative to the central column 21, and the electrode assembly 22 is configured to be wound around the peripheral wall of the central column 21, the water outlet end of the electrode assembly 22 extends along the axial direction of the central column 21. By setting the guide groove 214 to extend along the axial direction of the central column 21, it is convenient to set the guide groove 214 opposite to the water outlet end of the electrode assembly 22, thus ensuring the diversion effect of purified water.

[0144] In some embodiments, such as Figure 8 As shown, in order to enhance the diversion effect of purified water, multiple diversion channels 214 and multiple water passage holes 212 are provided. Multiple diversion channels 214 and multiple water passage holes 212 are arranged opposite to each other, and at least a portion of the multiple water passage holes 212 are arranged along the circumference of the central column 21.

[0145] Optionally, each guide channel 214 may be configured to form fluid communication with a plurality of water passage holes 212 arranged axially along the central column 21, each guide channel 214 extending axially along the central column 21.

[0146] Optionally, multiple guide channels 214 and multiple water passage holes 212 are arranged opposite to each other, the multiple water passage holes 212 are arranged circumferentially along the central column 21, and the multiple guide channels 214 are also arranged circumferentially along the central column 21, with each guide channel 214 extending axially along the central column 21.

[0147] In some embodiments, multiple water passage holes 212 are provided, and the sum of the water passage areas of the multiple water passage holes 212 is not less than 20 mm. 2 For example, the sum of the water passage areas of multiple water passage holes 212 is 20mm. 2 25mm 2 35mm 2 and 50mm 2 This design avoids significant flow resistance when water passes through the water passage 212, preventing the water passage 212 from restricting the flow of water.

[0148] In some embodiments, in order to ensure the venting effect of the capacitive deion filter element 2, the axial distance between the water passage 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.

[0149] Optionally, the length of the capacitor deion filter element 2 is approximately 333-350mm, and the axial distance between the water passage hole 212 and the second end of the central column 21 can be set to be less than 50mm, so that the water passage hole 212 is as far away from the water outlet 213 of the capacitor deion filter element 2 as possible, thereby ensuring the air venting effect.

[0150] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, the first end of the composite filter element abuts against the inner wall of the first end of the housing 1, the second end of the composite filter element abuts against the first end of the post-filter element 50, and the second end of the post-filter element 50 abuts against the inner wall of the second end of the housing 1; wherein, the composite filter element includes a capacitor deionization filter element 2 and a pre-filter element 20 coaxially sleeved on the outside of the capacitor deionization filter element 2.

[0151] Since the capacitive deionization filter element 2 must rely on power supply to operate, in order to achieve water-electricity isolation design, a receiving space 112 is formed between the first end of the capacitive deionization 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 post-filter element 50 and the inner wall of the first end of the housing 1. The receiving space 112 and the water outlet space 111 are arranged opposite to each other and isolated from each other. The water inlet port 101 and the water outlet port 102 on the housing 1 are located at the second end of the housing 1 and are connected to the receiving cavity inside the housing 1.

[0152] The peripheral wall of the post-filter 50 and the inner wall of the housing 1 have a first gap, and the peripheral wall of the pre-filter 20 and the inner wall of the housing 1 have a second gap. The inlet port 101, the first gap, the second gap and the pre-filter 20 are connected in sequence to form a fluid connection. The outlet channel 5001, the outlet space 111 and the outlet port 102 of the post-filter 50 are connected in sequence to form a fluid connection.

[0153] In some embodiments, such as Figure 4 and Figure 6 As shown, the capacitor deionization filter element 2 also includes: an electrical connection component 5 disposed in the accommodating space 112, including a positive terminal 51 and a negative terminal 52, which are used to connect to an external power source.

[0154] The capacitive deionization filter element 2 has a positive electrode tab 201 and a negative electrode tab 202 at the end opposite to the post-filter element 50. The positive terminal 51 is connected to the positive electrode plate through the positive electrode tab 201, and the negative terminal 52 is connected to the negative electrode plate through the negative electrode tab 202. This design facilitates the application of voltage to the positive and negative electrodes by an external power source through the power connection component 5.

[0155] In some embodiments, such as Figure 3 , Figure 5 and Figure 10 As shown, the water purification assembly also includes: a first end cap 3; the first end cap 3 includes a first side wall 31 and a first cover body 32 that are bent and connected, the first side wall 31 abuts against the inner wall of the first end of the housing 1, the first cover body 32 is sealed to the first end of the composite filter element, and the first cover body 32, the first side wall 31 and the inner wall of the first end of the housing 1 enclose and form an accommodating space 112.

[0156] The electrode assembly 22 also includes a positive electrode tab 201 connected to the positive electrode plate and a negative electrode tab 202 connected to the negative electrode plate. The first cover 32 is provided with a first through hole for the positive electrode tab 201 to pass through and a second through hole for the negative electrode tab 202 to pass through.

[0157] Understandably, the first cover 32 is disc-shaped, and the first sidewall 31 extends circumferentially relative to the central axis of the capacitor deionization filter element 2. The first sidewall 31 is located on the side of the first cover 32 away from the capacitor deionization filter element 2 and abuts against the inner wall of the first end of the housing 1, so that the first cover 32, the first sidewall 31 and the inner wall of the housing 1 enclose and form an accommodating space 112.

[0158] In some embodiments, such as Figure 3 , Figure 5 and Figure 10 As shown, the first end cap 3 further includes a first baffle wall 33 that is bent and connected to the first cover body 32. The outer side of the first baffle wall 33 is sealed to the inner wall of the housing 1. The first cover body 32 and the first end of the composite filter element are sealed together by a filler adhesive. The first baffle wall 33 is located on the outer side of the peripheral wall of the pre-filter element 20. For example, the inner side of the first baffle wall 33 is attached to the peripheral wall of the pre-filter element 20. Of course, the inner side of the first baffle wall 33 and the peripheral wall of the pre-filter element 20 can also be spaced apart.

[0159] Understandably, the filler adhesive forms a sealant layer at the first end of the composite filter element, and the first cover 32 adheres to the surface of the sealant layer to achieve a seal at the first end of the composite filter element.

[0160] The first adhesive barrier 33 is located on the outer edge of the first cover 32 and extends circumferentially relative to the center of the first cover 32. The inner diameter of the first adhesive barrier 33 is adapted to the diameter of the pre-filter element 20. The first adhesive barrier 33 is used to prevent the filling adhesive from overflowing to the peripheral wall of the pre-filter element 20.

[0161] A first support rib may be provided on one side of the first cover 32 facing the composite filter element. The first support rib may 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 adhesive at the first end of the composite filter element and to help ensure the molding quality of the filling adhesive.

[0162] 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 first cover 32, the first side wall 31 and the inner wall of the shell 1.

[0163] In some embodiments, such as Figure 3 and Figure 4 As shown, a partition 121 is provided on the inner wall of the second end of the housing 1, and the partition 121 and the second end of the post-filter 50 enclose a water outlet space 111.

[0164] Understandably, the partition 121 extends circumferentially relative to the water outlet 102, and the peripheral wall of the water outlet end of the post-filter 50 is sealed to the inner side of the partition 121, so that the partition 121 and the second end of the post-filter 50 enclose a water outlet space 111.

[0165] In some embodiments, such as Figure 3 and Figure 4 As shown, the water purification assembly also includes: a second end cap 4, which includes a second cover body 41 and a second baffle wall 42 that are bent and connected. The second cover body 41 is sandwiched between the second end of the composite filter element and the first end of the post-filter element 50. The second cover body 41 is provided with a through hole, which is used to realize the connection between the outlet 213 of the central column 21 and the first port of the reversing valve 40.

[0166] The second cover 41 is sealed to the second end of the composite filter element by a filler adhesive. The second baffle wall 42 is located on the outer side of the peripheral wall of the pre-filter element 20. For example, the inner side of the second baffle wall 42 is attached to the peripheral wall of the pre-filter element 20. Of course, the inner side of the second baffle wall 42 and the peripheral wall of the pre-filter element 20 can also be spaced apart. A third 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, the first gap, the third gap, the second gap and the pre-filter element 20 are sequentially connected in fluid communication.

[0167] Understandably, the filler adhesive forms a sealing layer at the second end of the composite filter element. The second sealing wall 42 is located on the outer edge of the second cover 41 and extends circumferentially relative to the central column 21. The inner diameter of the second sealing wall 42 is adapted to the diameter of the pre-filter element 20.

[0168] Furthermore, such as Figure 3 and Figure 4 As shown, the second end cap 4 also includes a second side wall 43, which is located on the side of the second cover 41 facing the rear filter element 50 and extends circumferentially relative to the central column 21; the second side wall 43 is used to fit onto the peripheral wall of the rear filter element 50 to install and position the rear filter element 50.

[0169] A fourth gap is left between the outer side of the second sidewall 43 and the inner wall of the housing 1, and the water inlet port 101, the first gap, the fourth gap, the third gap, the second gap and the pre-filter 20 are connected in sequence to form a fluid connection.

[0170] Furthermore, in order to ensure the sealing effect of the second end of the composite filter element, the second cover 41 is provided with a second support rib on one side facing the composite filter element. The second support rib can be configured to extend radially along one side of the composite filter element. The second support rib is used to ensure the thickness of the filling adhesive at the second end of one side of the composite filter element and to help ensure the molding quality of the filling adhesive.

[0171] In some embodiments, such as Figure 1 As shown, the water purification assembly also includes a flow regulating valve 30, which is located at the outlet end of the capacitor deionization filter element 2. The flow regulating valve 30 is used to regulate the flow rate of purified water or wastewater output by the capacitor deionization filter element 2.

[0172] In some embodiments, such as Figure 1 As shown, the water purification assembly also includes a switch valve 10, which is located at the water inlet port 101 and is used to control the water flow status at the water inlet port 101.

[0173] In some embodiments, the water purification assembly further includes a pressure regulating valve, which is located at the water inlet port 101 and is used to control the water pressure of the raw water supplied through the water inlet port 101.

[0174] In some embodiments, such as Figure 1 As shown, the water purification component also includes: a first TDS sensor 100, which is located at the water inlet port 101 and is used to detect the TDS value of the water entering through the water inlet port 101.

[0175] Understandably, the first TDS sensor 100 is configured to be electrically connected to the control module, which is electrically connected to the deionized battery cell.

[0176] When the TDS value fed back by the first TDS sensor 100 is greater than the first preset value, for example, the first preset value is 10-100ppm, the control module controls the capacitive deion filter 2 to work in the water purification state, so as to control the capacitive deion filter 2 to desalinate the water delivered by the pre-filter 20.

[0177] TDS is an abbreviation for Total Dissolved Solids. The TDS value refers to the concentration of total dissolved substances in water, measured in milligrams per liter (mg / L). It primarily reflects the concentration of calcium in the water. 2+ Mg 2+ Na + K + Plasma concentration.

[0178] In some embodiments, such as Figure 1 As shown, the water purification assembly also includes a second TDS sensor 200, which is located between the reversing valve 40 and the post-filter 50. The second TDS sensor 200 is used to detect the TDS value of the purified water output by the capacitive deionization filter 2.

[0179] Understandably, the first TDS sensor 100 and the second TDS sensor 200 are electrically connected to the control module, and the control module is electrically connected to the deionized battery cell.

[0180] When the TDS value fed back by the first TDS sensor 100 is greater than a first preset value, for example, the first preset value is 10-100 ppm, the control module controls the capacitive deion filter 2 to operate in the water purification state; when the TDS value fed back by the second TDS sensor 200 is less than the second preset value, the control module controls the reversing valve 40 to be in the first state, so that the purified water output from the capacitive deion filter 2 flows to the post-filter 50, and the post-filter 50 filters the purified water output from the capacitive deion filter 2 again; when the TDS value fed back by the second TDS sensor 200 is greater than or equal to the second preset value, the control module controls the reversing valve 40 to be in the second state, so that the water output from the capacitive deion filter 2 flows to the wastewater outlet.

[0181] The second preset value is less than the first preset value.

[0182] In some embodiments, such as Figure 1 As shown, the water purification assembly also includes a third TDS sensor 300, which is located between the reversing valve 40 and the wastewater outlet. The third TDS sensor 300 is used to detect the TDS value of the wastewater output by the capacitive deionization filter 2.

[0183] Understandably, the first TDS sensor 100 and the third TDS sensor 300 are electrically connected to the control module, and the control module is electrically connected to the deionized battery cell.

[0184] When the deionized water filter element is in regeneration mode, the control module is also used to control the deionized water filter element 2 to stop working, or to put the reversing valve 40 in the first state, and to control the deionized water filter element 2 to work in water purification mode if the difference between the TDS values ​​fed back by the third TDS sensor 300 and the first TDS sensor 100 is less than a third preset value. The third preset value is less than the first preset value.

[0185] Understandably, the control module can determine whether the capacitive deionization filter element 2 has completed regeneration based on the difference in TDS values ​​fed back by the first TDS sensor 100 and the third TDS sensor 300. For example, when the difference is zero, it can be determined that the capacitive deionization filter element 2 has completed regeneration. At this time, the control module can control the power supply to the capacitive deionization filter element 2 to stop, or control the capacitive deionization filter element 2 to operate in the water purification state.

[0186] 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.

[0187] 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 2 can be inserted into the installation cavity through the installation port.

[0188] Since the water purification equipment includes a capacitor deionization filter element 2, and the specific structure of the capacitor deionization filter element 2 is as described in the above embodiments, the water purification equipment of 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.

[0189] In some embodiments, such as Figure 1 As shown, the water purification equipment also includes: a flow meter 60, a flow regulating valve 30, and a control module; the flow meter 60 is used to collect the water flow rate at the outlet port 102; the flow regulating valve 30 is located at the outlet end of the capacitor deionization filter element 2; the control module is connected to the flow meter 60, the flow regulating valve 30, and the reversing valve 40 respectively.

[0190] The control module is used to control the opening degree of the flow regulating valve 30 according to the water flow rate, and to determine the water output of the water outlet 102 according to the water flow rate and the water outlet area of ​​the water outlet 102. When the water output is greater than the preset water output, the control module controls the reversing valve 40 to switch from the first state to the second state.

[0191] Understandably, the control module can adjust the opening of the flow regulating valve 30 in real time based on the water flow rate fed back by the flow meter 60, so as to ensure that the water flow rate output by the water purification component is maintained at the set value.

[0192] After the working time of the capacitor deion filter 2 exceeds a certain period of time, the desalination efficiency of the capacitor deion filter 2 will be greatly reduced. Therefore, the water output of the outlet port 102 can be calculated by the water flow rate and the water output area of ​​the outlet port 102. When the water output is greater than the preset water output, the reversing valve 40 is controlled to switch from the first state to the second state. At this time, the capacitor deion filter 2 is controlled to be in the regeneration state to ensure that the capacitor deion filter 2 can be reused.

[0193] In some embodiments, the water purification device further includes: a human-machine interaction module and a control module;

[0194] The human-machine interaction module is used to receive the user's first command and second command; the control module is connected to the human-machine interaction module and the reversing valve 40 respectively. The control module is used to control the reversing valve 40 to switch to the first state in response to the first command, and to control the reversing valve 40 to switch to the second state in response to the second command.

[0195] Understandably, the human-machine interaction module can be a touch screen, through which users can send control commands. This allows users to actively control the reversing valve 40 to be in the first state and the capacitor deionization filter 2 to be in the desalination state, so that the water purification equipment works in the purified water output mode. Users can also actively control the reversing valve 40 to be in the second state and the capacitor deionization filter 2 to be in the regeneration state, so that the water purification equipment works in the wastewater output mode.

[0196] In some embodiments, such as Figure 1 As shown, the water purification equipment also includes a sterilization component 70; the sterilization component 70 is installed on the pipeline between the water outlet port 102 and the water outlet 213 of the water purification equipment, and the sterilization component 70 is used to sterilize the purified water output from the water outlet port 102.

[0197] Understandably, the sterilization component 70 can be configured to be electrically connected to the control module. The sterilization component 70 can be an ultraviolet germicidal lamp to sterilize the purified water output from the water purification component by ultraviolet irradiation; the sterilization component 70 can also include an ultraviolet lamp and a titanium dioxide photocatalytic layer, which, under ultraviolet irradiation, can generate reactive oxygen species, such as hydroxyl radicals, to achieve sterilization.

[0198] Finally, it should be noted that the above embodiments are only for illustrating the present invention and not for limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand 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 should be covered within the scope of the claims of the present invention.

Claims

1. A water purification component, characterized in that, include: The housing (1) has a receiving cavity and an inlet port (101), an outlet port (102) and a wastewater outlet communicating with the receiving cavity; The pre-filter (20), the capacitor deionization filter (2) and the post-filter (50) are respectively disposed in the accommodating cavity. The water inlet port (101), the pre-filter (20) and the capacitor deionization filter (2) are sequentially connected in fluid communication. The post-filter (50) and the water outlet port (102) are connected in fluid communication. The reversing valve (40) has a first state and a second state. The capacitor deionization filter (2) is connected to the post-filter (50) and the wastewater outlet through the reversing valve (40). When the reversing valve (40) is in the first state, the reversing valve (40) is used to control the flow of purified water output from the capacitor deionization filter (2) to the post-filter (50); when the reversing valve (40) is in the second state, the reversing valve (40) is used to control the flow of wastewater output from the capacitor deionization filter (2) to the wastewater outlet. The pre-filter (20) is sleeved on the outside of the capacitor deionization filter (2), and the capacitor deionization filter (2) and the post-filter (50) are coaxially arranged. The post-filter element (50) includes a housing (501) and a filter element body (502). The filter element body (502) is disposed inside the housing (501), and a water passage space is formed between the filter element body (502) and the housing (501). A water outlet channel (5001) is provided inside the filter element body (502). The first port of the reversing valve (40) is connected to the outlet end of the capacitor deion filter (2), the second port of the reversing valve (40) is connected to the water passage space, the third port of the reversing valve (40) is connected to one end of the outlet channel (5001), and the other end of the outlet channel (5001) is connected to the outlet port (102). When the reversing valve (40) is in the first state, the first port and the second port of the reversing valve (40) are connected; when the reversing valve (40) is in the second state, the first port and the third port of the reversing valve (40) are connected, and the outlet port (102) is used as the wastewater outlet.

2. The water purification component according to claim 1, characterized in that, The capacitor deionization filter element (2) includes: an electrode assembly (22), wound into a column shape, including 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). The 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.

3. The water purification component according to claim 2, characterized in that, The capacitor deionization filter element (2) further includes: a central column (21), having a water outlet channel (211) and a water passage hole (212) communicating with the water outlet channel (211), the water outlet channel (211) being located inside the central column (21), and the water passage hole (212) being located on the peripheral wall of the central column (21); The electrode assembly (22) is wound around the peripheral wall of the central column (21), and the two ends of the electrode assembly (22) along the axial direction of the central column (21) are sealed. The inner and outer ends of the electrode assembly (22) relative to the central column (21) are respectively formed as the water outlet end and the water inlet end. 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 passage (212).

4. The water purification component according to claim 3, characterized in that, The central column (21) has an outlet (213) that communicates with the water outlet channel (211). The outlet (213) is located at the first end of the central column (21) and is configured to communicate with the post-filter (50) and the wastewater outlet respectively through the reversing valve (40). The water passage hole (212) is located on the peripheral wall near the second end of the central column (21).

5. The water purification component according to claim 4, characterized in that, The peripheral wall of the central column (21) is provided with a flow guide groove (214), and the flow guide groove (214) and the water passage hole (212) are in fluid communication. One end of the guide groove (214) is located on the peripheral wall near the first end of the central column (21), and the other end is located on the peripheral wall near the second end of the central column (21).

6. The water purification component according to claim 2, characterized in that, The two adjacent electrode sheets (222) are arranged opposite each other along the stacking direction, and the insulating sheet (221) and the electrode sheet (222) are staggered along the stacking direction so that the electrode sheet (222) is hidden between the two adjacent insulating sheets (221).

7. The water purification component according to claim 2, characterized in that, The capacitor deionization filter element (2) further includes: a power connection component (5), including a positive terminal (51) and a negative terminal (52), the positive terminal (51) and the negative terminal (52) being used to connect to an external power source; The capacitor deionization filter element (2) has a positive electrode tab (201) and a negative electrode tab (202) at one end away from the post-filter element (50). The positive electrode (51) is connected to the positive electrode plate through the positive electrode tab (201), and the negative electrode (52) is connected to the negative electrode plate through the negative electrode tab (202).

8. The water purification component according to any one of claims 1 to 7, characterized in that, Also includes: A flow regulating valve (30) is provided at the outlet end of the capacitor deion filter (2) to regulate the flow rate of purified water or wastewater output by the capacitor deion filter (2).

9. The water purification component according to any one of claims 1 to 7, characterized in that, Also includes: A first TDS sensor (100) is used to detect the TDS value of the water entering through the inlet port (101); And / or, a second TDS sensor (200) is disposed between the reversing valve (40) and the post-filter (50) for detecting the TDS value of the purified water output by the capacitive deionization filter (2); And / or, a third TDS sensor (300), located between the reversing valve (40) and the wastewater outlet, is used to detect the TDS value of the wastewater output by the capacitive deionization filter (2).

10. A water purification device, characterized in that, include: The body and the water purification component as described in any one of claims 1 to 9; the body has a mounting cavity, and the water purification component is detachably disposed in the mounting cavity.

11. The water purification equipment according to claim 10, characterized in that, Also includes: A flow meter (60) is used to collect the outflow rate of the water at the outlet port (102); A flow regulating valve (30) is provided at the outlet end of the capacitor deionization filter element (2); The control module is connected to the flow meter (60), the flow regulating valve (30), and the reversing valve (40) respectively; The control module is used to control the opening degree of the flow regulating valve (30) according to the water flow rate, and to determine the water output of the water outlet (102) according to the water flow rate and the water output area of ​​the water outlet (102), and to control the reversing valve (40) to switch from the first state to the second state when the water output is greater than the preset water output.

12. The water purification equipment according to claim 10, characterized in that, Also includes: The human-computer interaction module is used to receive the user's first and second commands; The control module is connected to the human-machine interaction module and the reversing valve (40) respectively. The control module is used to control the reversing valve (40) to switch to the first state in response to the first instruction, and to control the reversing valve (40) to switch to the second state in response to the second instruction.

13. The water purification device according to any one of claims 10 to 12, characterized in that, Also includes: The sterilization component (70) is disposed on the pipeline between the water outlet port (102) and the water outlet (213) of the water purification equipment. The sterilization component (70) is used to sterilize the purified water output from the water outlet port (102).

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