Water purification system

Abstract

The present application relates to the technical field of water purification, and provides a water purification system, comprising: a pre-filter, a first water path and a second water path; the pre-filter is used for filtering and impurity-removing treatment of water; the first water path comprises a first filter, a water tank and a first proportional valve which are sequentially arranged along the water flow direction; the second water path comprises a second filter and a second proportional valve which are sequentially arranged along the water flow direction; the water outlet end of the pre-filter is communicated with the water inlet end of the first water path and the water inlet end of the second water path respectively, and the water outlet end of the first water path and the water outlet end of the second water path are communicated; wherein the first filter comprises a nanofiltration membrane or an RO reverse osmosis membrane, and the second filter comprises a capacitive deionization filter. The present application can control the water quality of the output water body of the whole water purification system by respectively adjusting the water outlet flow of the first water path and the second water path, and ensure that different water outlet water qualities meeting the requirements of users are output.

Description

Technical Field

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

[0002] In household water use, the mainstream solutions for filtering out charged ions in water currently include ultrafiltration, nanofiltration, and reverse osmosis. Among them, reverse osmosis technology has become the market's first choice due to its excellent filtration effect (99%). However, it also brings the problem that, with people's awareness of drinking water and their attention to drinking water health, reverse osmosis water is too pure and does not retain mineral ions that are beneficial to the human body, and cannot output water of different qualities that meet the needs of users. Summary of the Invention

[0003] 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 system that can utilize the physical filtration function of a pre-filter to remove impurities from water, and mix the purified water output from a capacitive deionization filter with the purified water output from a nanofiltration membrane or RO reverse osmosis membrane in a certain proportion according to actual needs, ensuring that purified water with different output water qualities is output to users, thus meeting users' healthy drinking water needs.

[0004] A water purification system according to a first aspect of the present invention includes: Pre-filter cartridges are used to filter and remove impurities from water. The first water passage includes a first filter element, a water tank, and a first proportional valve arranged sequentially along the water flow direction; The second water passage includes a second filter element and a second proportional valve arranged sequentially along the water flow direction; The water outlet of the pre-filter is connected to the water inlet of the first water path and the water inlet of the second water path, respectively, and the water outlet of the first water path and the water outlet of the second water path are connected. The first filter element includes a nanofiltration membrane or an RO reverse osmosis membrane, and the second filter element includes a capacitive deionization filter element.

[0005] According to one embodiment of the present invention, the water purification system further includes: The first TDS sensor is used to collect the TDS value of the water output from the first filter cartridge. The second TDS sensor is used to collect the TDS value of the water output from the second filter cartridge. The control module is electrically connected to the first TDS sensor, the second TDS sensor, the first proportional valve, and the second proportional valve, respectively. The control module is used to control the opening degree of the first proportional valve and the second proportional valve according to the TDS values ​​fed back by the first TDS sensor and the second TDS sensor.

[0006] According to one embodiment of the present invention, the water purification system further includes: The third TDS sensor is used to collect the TDS value of the water received by the pre-filter. The control module is electrically connected to the third TDS sensor and the capacitive deionization filter element respectively. The control module is used to control the polarity of the voltage connected to the capacitive deionization filter element so that the capacitive deionization filter element works in a water purification state or a regeneration state. When the TDS value fed back by the third TDS sensor is greater than the first preset value, the control module controls the capacitive deionization filter to work in the water purification state; When the capacitor deionization filter element is in the regeneration state, the control module is also used to control the capacitor deionization filter element to stop working or control the capacitor deionization filter element to work in the water purification state when the difference between the TDS values ​​fed back by the second TDS sensor and the third TDS sensor is less than a second preset value.

[0007] According to one embodiment of the present invention, the capacitive deionization filter element includes a filter element body, the filter element body including a central column and an electrode assembly; The central column has a water outlet channel and a water passage hole communicating with the water outlet channel. The water passage hole is located on the peripheral wall of the central column, and the water outlet channel is located inside the central column. The electrode assembly is wound around the peripheral wall of the central column, and both ends of the electrode assembly along the axial direction of the central column are sealed. The outer side of the electrode assembly is used to receive the input of raw water, and the inner side of the electrode assembly is used to output purified water or wastewater.

[0008] According to one embodiment of the present invention, the electrode assembly includes an insulating sheet and at least two electrode layers, the insulating sheet and the electrode layers being stacked, the insulating sheet being sandwiched between two adjacent electrode layers; each electrode layer includes a current collector layer and an adsorption layer, the adsorption layer being provided on both the front and back sides of the current collector layer; each adjacent electrode layer is respectively configured as a positive electrode and a negative electrode, and a water passage for accommodating the insulating sheet is formed between the positive electrode and the negative electrode; The electrode assembly is formed as an outlet and an inlet at its inner and outer ends relative to the central column. The inlet is connected to the outlet through the water passage, and the outlet extends toward the peripheral wall of the central column and is in fluid communication with the water passage hole.

[0009] According to one embodiment of the present invention, the first end of the central column is provided with a water outlet, and the water outlet is connected to the water outlet channel; The water passage hole is located on the peripheral wall near the second end of the central column. The peripheral wall of the central column is provided with a flow guide groove, and a fluid communication is formed between the flow guide groove and the water passage hole.

[0010] According to one embodiment of the present invention, the capacitive deionization filter element further includes: a housing having a receiving cavity and an inlet port and an outlet port communicating with the receiving cavity; The filter element body is disposed in the receiving cavity, and a gap is left between the peripheral wall of the filter element body and the inner wall of the receiving cavity. The water inlet port and the gap are in fluid communication, and the water outlet channel and the water outlet port are in fluid communication.

[0011] According to one embodiment of the present invention, the water tank comprises: The container is used to hold the water purified by the first filter element; The first sterilization component is connected to the tank body and is used to sterilize the water inside the tank body; A liquid level detection component is connected to the tank and is used to detect the water level information inside the tank.

[0012] According to one embodiment of the present invention, the first water path further includes a booster pump, which is disposed on the water inlet side of the first filter element along the water flow direction; And / or, the first water path further includes a water pump, which is located between the water tank and the first proportional valve along the water flow direction.

[0013] According to one embodiment of the present invention, the pre-filter element includes any one of PP cotton filter element, carbon rod filter element or carbon fiber filter element.

[0014] According to one embodiment of the present invention, the water purification system further includes: The second sterilization component is located on the rear side of the outlet end of the first water path and the second water path along the water flow direction, and is used to sterilize the water output from the first water path and the second water path.

[0015] According to one embodiment of the present invention, the water purification system further includes: A temperature control component is located on the rear side of the outlet end of the first water path and the second water path along the water flow direction, and is used to regulate the temperature of the water output from the first water path and the second water path. The temperature control component includes a heating element and / or a cooling element.

[0016] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: By setting up a first water path and a second water path on the outlet side of the pre-filter, in practical applications, the physical filtration function of the pre-filter can be used to filter the received raw water and remove impurities from the water. Then, based on the corresponding first and second filter elements in the first and second water paths, desalination treatment is performed on the water in their respective water paths. According to actual needs, the outlet flow rate of the first filter element in the first water path can be adjusted by using a first proportional valve, and the outlet flow rate of the second filter element in the second water path can be adjusted by using a second proportional valve, thereby controlling the water quality of the output water of the entire water purification system and ensuring that different water qualities that meet the user's needs are output.

[0017] 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

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the water purification system provided in an embodiment of the present invention; Figure 2 This is one of the structural schematic diagrams of the capacitor deionization filter element provided in the embodiments of the present invention; Figure 3 This is the second schematic diagram of the structure of the capacitor deionization filter element provided in the embodiment of the present invention; Figure 4 This is the third schematic diagram of the structure of the capacitor deionization filter element provided in the embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the capacitor deionization filter element provided in the embodiment of the present invention; Figure 6 This is one of the structural schematic diagrams of the central column provided in the embodiments of the present invention; Figure 7 This is a second schematic diagram of the structure of the central column provided in an embodiment of the present invention; Figure 8 This is a schematic diagram of the structure of the electrode assembly wound around the central column according to an embodiment of the present invention; Figure 9 This is a schematic diagram of the structure of the first end cap provided in an embodiment of the present invention; Figure 10 This is a schematic diagram of the structure of the second end cap provided in an embodiment of the present invention; Figure 11This is a cross-sectional schematic diagram of the stacked arrangement of the electrode assembly provided in an embodiment of the present invention; Figure 12 This is a cross-sectional schematic diagram of the electrode sheet provided in an embodiment of the present invention; Figure label: 10. Pre-filter; 20. First water path; 201. First filter; 202. Water tank; 2021. Tank body; 2022. First sterilization component; 2023. Liquid level detection assembly; 203. First proportional valve; 204. Booster pump; 205. Water pump; 30. Second water path; 301. Second filter; 302. Second proportional valve; 40. Second sterilization component; 50. Temperature control assembly; 501. Heating element; 502. Cooling element; 100. First TDS sensor; 200. Second TDS sensor; 300. Third TDS sensor; 1. Shell; 101. Inlet port; 102. Outlet port; 111. Outlet space; 112. Accommodation space; 121. First partition; 122. Second partition; 2. Filter element body; 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; 2001. Positive electrode tab; 2002. Negative electrode tab; 3. First end cap; 31. First side wall; 32. First cover body; 33. First adhesive barrier wall; 4. Second end cap; 41. Second cover body; 42. Second baffle wall; 5. Electrical connection assembly; 51. Positive terminal; 52. Negative terminal. Detailed Implementation

[0020] 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.

[0021] 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.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] The following is combined with Figures 1-12 The invention provides a detailed description of the water purification system through specific embodiments and application scenarios.

[0026] like Figure 1 As shown, an embodiment of the present invention provides a water purification system, including: a pre-filter 10, a first water path 20, and a second water path 30; The pre-filter 10 is used to filter and remove impurities from the water; the first water path 20 includes a first filter 201, a water tank 202 and a first proportional valve 203 arranged sequentially along the water flow direction; the second water path 30 includes a second filter 301 and a second proportional valve 302 arranged sequentially along the water flow direction. The water outlet of the pre-filter 10 is connected to the water inlet of the first water path 20 and the water inlet of the second water path 30, respectively, and the water outlet of the first water path 20 and the water outlet of the second water path 30 are connected.

[0027] Understandably, the pre-filter 10 can filter and remove impurities from raw water from the tap water system. Depending on the material used, the pre-filter 10 may include any one of PP cotton filter, carbon rod filter, or carbon fiber filter. Alternatively, the pre-filter 10 may include multiple filter layers, which are nested together from the inside out. Each filter layer may include any one of PP cotton filter, carbon rod filter, or carbon fiber filter. Adjacent filter layers may have different types. For example, when the pre-filter 10 has two filter layers, the outermost filter layer may be a PP cotton filter, and the innermost filter layer may be a carbon rod filter or a carbon fiber filter.

[0028] The number of the first waterway 20 and the second waterway 30 can be one or more; the outlet of the first waterway 20 and the outlet of the second waterway 30 are connected and configured to be connected to the drinking water inlet, so that the user can receive the water treated by the first waterway 20 and the second waterway 30 at the drinking water inlet.

[0029] For the first filter element 201 in the first water path 20, the first filter element 201 includes a nanofiltration membrane or an RO reverse osmosis membrane; specifically, a nanofiltration membrane is a thin film used in separation technology, which is located between reverse osmosis and ultrafiltration. The main feature of nanofiltration membrane is that it can effectively remove divalent ions and organic matter with molecular weight between 200 and 1000 from water, thereby softening water quality (reducing hardness), while retaining some monovalent salts that are beneficial to the human body, such as potassium and sodium.

[0030] Meanwhile, RO reverse osmosis membranes are a core component widely used in water purification technology. Reverse osmosis (RO) is a pressure-driven separation process that forces water molecules through a semi-permeable membrane by applying external force (usually pressure generated by a high-pressure pump), thereby separating water from impurities dissolved within it. RO membranes primarily allow water molecules to pass through, while most dissolved solids (such as salts), organic matter, colloidal particles, viruses, and bacteria are retained and discharged with the concentrate. RO membranes effectively remove salts and other dissolved substances from water, with desalination rates typically exceeding 95%, and even reaching over 99% for certain specific substances (such as calcium and magnesium ions). The pore size of RO membranes is extremely small, reaching 0.0001 micrometers (approximately 1 angstrom), allowing them to intercept the vast majority of microorganisms, bacteria, and viruses.

[0031] The second filter element 301 in the second water path 30 includes a capacitive deionization filter element. The capacitive deionization filter element has an inlet port 101 and an outlet port 102 for outputting purified water or wastewater. The capacitive deionization filter element includes a wound, columnar electrode assembly 22. The electrode assembly 22 typically includes stacked positive and negative electrode plates, which are isolated from each other, forming a flow channel between them for water flow. When a positive voltage is applied to the positive and negative electrode plates, the capacitive deionization filter element is in a purified water state. At this time, cations, anions, or charged particles in the water migrate to the surface of the positive and negative electrode plates under the influence of the electric field, thereby outputting desalinated purified water from the outlet port 102 of the capacitive deionization filter element. The concentration of the water output from the outlet port 102 of the capacitive deionization filter element can be controlled by controlling the magnitude of the positive voltage applied to the capacitive deionization filter element.

[0032] Correspondingly, when a reverse voltage is applied to the positive and negative electrodes, the capacitor deionization filter is in a regeneration state. At this time, the anions, cations, or charged particles adsorbed on the surfaces of the positive and negative electrodes will automatically detach, so that the outlet port 102 of the capacitor deionization filter outputs wastewater with a higher concentration.

[0033] Both the first proportional valve 203 and the second proportional valve 302 can be electromagnetic proportional valves. The controlled end of the electromagnetic proportional valve can be configured to be electrically connected to the control module, and the control module controls the opening degree of the electromagnetic proportional valve.

[0034] In practical applications, the first filter element 201 in the first water path 20 can be started first. After the water tank 202 is full of water output from the first filter element 201, the second filter element 301 in the second water path 30 can be started. Finally, the opening degree of the first proportional valve 203 and the second proportional valve 302 can be controlled according to the design requirements to achieve the output of water with different ion contents of the whole water purification system.

[0035] Since the first filter element 201 in the first water path 20 uses a nanofiltration membrane or an RO reverse osmosis membrane, while the second filter element 301 in the second water path 30 uses a capacitive deionization filter element, the TDS value of the water output from the first water path 20 is usually lower than the TDS value of the water output from the second water path 30. Therefore, by simply adjusting the opening of the first proportional valve 203 and the second proportional valve 302, the TDS value of the mixed water output from the first water path 20 and the second water path 30 can be controlled to achieve water quality output with different ion contents.

[0036] In practical applications, the TDS value of the water output from the capacitor deionization filter can be controlled to maintain a first fixed value, such as 100-125 ppm. The TDS value of the water output from the first filter 201 is not finely controlled. Water with different ion contents can be output by controlling the opening of the first proportional valve 203 and the second proportional valve 302.

[0037] 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 mainly reflects the concentration of ions such as Ca2+, Mg2+, Na+, and K+ in the water.

[0038] As can be seen from the above, by setting a first water path 20 and a second water path 30 on the outlet side of the pre-filter cartridge 10, in practical applications, the physical filtration function of the pre-filter cartridge 10 can be used to filter the received raw water and remove impurities from the water. Then, based on the corresponding first filter cartridge 201 and second filter cartridge 301 of the first water path 20 and the second water path 30, the water in their respective water paths can be desalinated. According to actual needs, the outlet flow rate of the first filter cartridge 201 in the first water path 20 can be adjusted by the first proportional valve 203, and the outlet flow rate of the second filter cartridge 301 in the second water path 30 can be adjusted by the second proportional valve 302, thereby controlling the water quality of the output water of the entire water purification system and ensuring that different water qualities that meet the user's needs are output.

[0039] In some embodiments, such as Figure 1 As shown, the water purification system also includes: a first TDS sensor 100, a second TDS sensor 200, and a control module; The first TDS sensor 100 is used to collect the TDS value of the water output from the first filter element 201, and the second TDS sensor 200 is used to collect the TDS value of the water output from the second filter element 301. The control module is electrically connected to the first TDS sensor 100, the second TDS sensor 200, the first proportional valve 203, and the second proportional valve 302, respectively. The control module is used to control the opening degree of the first proportional valve 203 and the second proportional valve 302 according to the TDS values ​​fed back by the first TDS sensor 100 and the second TDS sensor 200.

[0040] Understandably, the control module can adjust the opening of the first proportional valve 203 independently based on the TDS value fed back by the first TDS sensor 100, and the control module can also adjust the opening of the second proportional valve 302 independently based on the TDS value fed back by the second TDS sensor 200.

[0041] Since the drinking water obtained by the user is a mixture of water output from the first water channel 20 and the second water channel 30, the control module adjusts the opening of the first proportional valve 203 and the opening of the second proportional valve 302 according to the user's water quality requirements, such as the user inputting a target TDS to the control module through the human-computer interaction module. The control module adjusts the opening of the first proportional valve 203 and the opening of the second proportional valve 302 according to the target TDS and the TDS values ​​fed back by the first TDS sensor 100 and the second TDS sensor 200, respectively, to ensure that the water quality of the mixed water output from the first water channel 20 and the second water channel 30 meets the user's requirements.

[0042] The human-machine interaction module can be a touch screen, and it is configured to be electrically connected to the control module, which can be a microcontroller or a PLC controller.

[0043] In some embodiments, such as Figure 1 As shown, the water purification system also includes: a third TDS sensor 300; the third TDS sensor 300 is used to collect the TDS value of the water received by the pre-filter cartridge 10; the control module is electrically connected to the third TDS sensor 300 and the capacitor deionization filter cartridge respectively, and the control module is used to control the polarity of the voltage connected to the capacitor deionization filter cartridge so that the capacitor deionization filter cartridge works in the water purification state or the regeneration state.

[0044] Understandably, when the TDS value fed back by the third TDS sensor 300 is greater than the first preset value, for example, the first preset value is 10-100ppm, the control module controls the capacitive deion filter to work in the water purification state so as to desalinate the water delivered by the pre-filter 10 to the second water path 30.

[0045] When the capacitive deionization filter cartridge is in regeneration mode, the control module is also used to control the capacitive deionization filter cartridge to stop working or to operate in water purification mode if the difference between the TDS values ​​fed back by the second TDS sensor 200 and the third TDS sensor 300 is less than a second preset value. The second preset value is less than the first preset value.

[0046] Understandably, the control module can determine whether the capacitive deionization filter cartridge has completed regeneration based on the difference in TDS values ​​fed back by the second TDS sensor 200 and the third TDS sensor 300. For example, when the difference is zero, it can be determined that the capacitive deionization filter cartridge has completed regeneration. At this time, the control module can control the power supply to the capacitive deionization filter cartridge to stop, or control the capacitive deionization filter cartridge to operate in water purification mode.

[0047] In some embodiments, such as Figure 1 As shown, in order to facilitate the control of the water outlet status of the first water channel 20, the first water channel 20 is also equipped with a first switch valve K1, which is located on the front side of the first filter element 201 along the water flow direction.

[0048] In some embodiments, such as Figure 1 As shown, in order to facilitate the control of the water outlet state of the second water circuit 30, the second water circuit 30 is also equipped with a first switching valve K2, which is located on the front side of the second filter element 301 along the water flow direction.

[0049] In some embodiments, such as Figure 1 As shown, in order to control the water output of the entire water purification system, the water purification system is also equipped with a third switch valve K3, which is located on the front side of the pre-filter 10 along the water flow direction.

[0050] In some embodiments, such as Figure 1 As shown, in order to control the stability of the entire water purification system, the water purification system is also equipped with a pressure regulating valve K4, which is located on the front side of the pre-filter 10 along the water flow direction.

[0051] The pre-filter 10 is configured to receive tap water from the tap water system, and the pressure regulating valve is used to regulate the pressure of the raw water supplied from the tap water system to the pre-filter 10.

[0052] In some embodiments, such as Figure 1 As shown, the first water path 20 also includes a booster pump 204, which is located on the inlet side of the first filter element 201 along the water flow direction.

[0053] Understandably, since the first filter element 201 includes a nanofiltration membrane or an RO reverse osmosis membrane, and the corresponding filter membrane of the nanofiltration membrane or RO reverse osmosis membrane has a small pore size, the booster pump 204 is used to provide driving force for the flow of water along the first filter element 201, so as to ensure that the first filter element 201 can properly filter the water.

[0054] In some embodiments, such as Figure 1 As shown, the first water path 20 also includes a water pump 205, which is located between the water tank 202 and the first proportional valve 203 along the water flow direction.

[0055] Understandably, the water tank 202 is connected in series between the first filter element 201 and the water pump 205. The water tank 202 is a sealed design, and a vent hole can be configured on the top of the water tank 202. The water pump 205 is used to drive the water to flow out of the water tank 202 and flow to the first proportional valve 203.

[0056] In some embodiments, such as Figure 1As shown, the water tank 202 includes: a tank body 2021, a first sterilization component 2022, and a liquid level detection component 2023; the tank body 2021 is used to hold the water purified by the first filter element 201; the first sterilization component 2022 is connected to the tank body 2021 and is used to sterilize the water in the tank body 2021; the liquid level detection component 2023 is connected to the tank body 2021 and is used to detect the water level information in the tank body 2021.

[0057] Understandably, the first sterilization component 2022 can be configured to be electrically connected to the control module. The first sterilization component 2022 can be an ultraviolet germicidal lamp to sterilize the purified water stored in the cabinet 2021 by ultraviolet irradiation; the sterilization component can also include an ultraviolet lamp and a titanium dioxide photocatalytic layer, which, under ultraviolet irradiation, can combine with titanium dioxide to generate active oxygen, such as hydroxyl radicals, to achieve sterilization.

[0058] The liquid level detection component 2023 can be configured to be electrically connected to the control module, and the control module is electrically connected to the water pump 205. The control module can control the working status of the water pump 205 based on the water level information in the tank 2021 fed back by the liquid level detection component 2023.

[0059] In some examples, the liquid level detection component 2023 includes a first liquid level switch and a second liquid level switch, which are arranged vertically opposite each other inside the housing 2021; the first liquid level switch is used to detect the maximum water level that the water in the housing 2021 can reach, and the second liquid level switch is used to detect the minimum water level that the water in the housing 2021 can reach.

[0060] In some examples, the level detection component 2023 includes a float switch that floats on the surface of the water inside the tank 2021 to detect the water level information inside the tank 2021.

[0061] In some embodiments, such as Figure 3 , Figure 4 and Figure 5 As shown, the capacitive deionization filter element includes a filter element body 2, which includes a central column 21 and an electrode assembly 22. The central column 21 has a water outlet channel 211 and a water passage hole 212 communicating with the water outlet channel 211. The water passage hole 212 is located on the peripheral wall of the central column 21, and the water outlet channel 211 is located inside the central column 21. 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 outer side of electrode assembly 22 is used to receive the input of raw water, and the inner side of electrode assembly 22 is used to output purified water or wastewater.

[0062] Among them, such as Figure 8As shown, when the electrode assembly 22 is wound, the inner side of one end of the electrode assembly 22 contacts the peripheral wall of the water outlet pipe, and then the electrode assembly 22 is wound layer by layer with the water outlet pipe as the central axis until the electrode assembly 22 is wound into a columnar distribution.

[0063] In some embodiments, such as Figure 3 , Figure 4 , Figure 11 and Figure 12 As shown, the electrode assembly 22 includes an insulating sheet 221 and at least two electrode sheets 222. The insulating sheet 221 and the electrode sheets 222 are stacked, with the insulating sheet 221 sandwiched between two adjacent electrode sheets 222. 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, and a water passage 2201 for accommodating the insulating sheet 221 is formed between the positive electrode sheet and the negative electrode sheet. The electrode assembly 22 is formed as an outlet end and an inlet end at its inner and outer ends relative to the central column 21. The inlet end is connected to the outlet end through the water passage 2201, and the outlet end extends toward the peripheral wall of the central column 21 and forms a fluid communication with the water passage hole 212.

[0064] 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.

[0065] For electrode sheet 222, the current collector layer 2221 of 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 electrode sheet 222 can be made of activated carbon and other adsorption materials to achieve adsorption of ions in raw water.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] In some embodiments, heavy metals include, but are not limited to, Pb, As, Fe, Cr, and Cu.

[0070] In some embodiments, the activated carbon has a particle size of 5 μm to 15 μm, a specific surface area of ​​1500 m² / g to 2200 m² / g, and an average pore size of 1 nm to 5 nm. For example, the activated carbon has particle sizes of 5 μm, 7 μm, 9 μm, 11 μm, 13 μm, 15 μm, etc., specific surface areas of 1500 m² / g, 1600 m² / g, 1700 m² / g, 1800 m² / g, 1900 m² / g, 2000 m² / g, 2100 m² / g, 2200 m² / g, etc., and average pore sizes of 1 nm, 2 nm, 3 nm, 4 nm, 5 nm, etc. The inventors discovered that when the particle size, specific surface area, and average pore size of activated carbon are controlled within the above-mentioned range, 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.

[0071] In some embodiments, the titanium dioxide particle size is 0.25 mm to 1.5 mm, the surface area is 200 m² / g to 240 m² / g, and the average pore size is 6 nm to 9 nm. For example, titanium dioxide particle sizes of 0.25 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1.3 mm, and 1.5 mm, surface areas of 200 m² / g, 210 m² / g, 220 m² / g, 230 m² / g, and 240 m² / g, and average pore sizes of 6 nm, 7 nm, 8 nm, and 9 nm, etc., are used. The inventors have found that controlling the particle size, surface area, and average pore size of titanium dioxide within the above ranges provides better active functional groups, exhibits better ion complexation ability, thereby improving the removal rate of heavy metals, and better synergistically works with activated carbon, retaining a certain amount of beneficial ions needed by the human body while removing heavy metals.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

[0080] In practical applications, the operation of a capacitive deionization filter cartridge includes an adsorption purification process and a desorption regeneration process. When two adjacent electrode plates 222 are electrically connected to the positive and negative poles of a power source 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 cartridge is the adsorption purification process.

[0081] 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, at which time the water passage 2201 will output concentrated water with a high ion concentration.

[0082] As can be seen from the above, the capacitive deionization filter 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.

[0083] 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 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.

[0084] In some embodiments, in order to ensure the purification effect on the raw water, two adjacent electrode sheets 222 are arranged opposite each other along the stacking direction to ensure the coverage of the electric field between the two adjacent electrode sheets 222 as much as possible, and then remove anions, cations and other charged particles in the raw water based on the electric field between the two adjacent electrode sheets 222.

[0085] 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 while also facilitating the placement of the water outlet end of the electrode assembly 22 opposite to the water passage 212 and / or guide groove 214 on the peripheral wall of the central column 21, ensuring unobstructed flow between the water passage 2201 within the electrode assembly 22 and the water outlet channel 211 within the central column 21. The stacking direction is along the thickness direction of the insulating sheet 221 or the electrode sheet 222.

[0086] In some embodiments, such as Figure 3 , Figure 5 and Figure 8 As shown, in order to facilitate the connection of two adjacent electrode plates 222 to the positive and negative terminals of the power supply, the electrode assembly 22 further includes: a positive electrode tab 2001 and a negative electrode tab 2002; the positive electrode tab 2001 is electrically connected to the current collector layer 2221 of the positive electrode plate; the negative electrode tab 2002 is electrically connected to the current collector layer 2221 of the negative electrode plate.

[0087] 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 2001, and the second extensions of each negative electrode are stacked to form a negative electrode tab 2002.

[0088] 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.

[0089] 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.

[0090] 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.

[0091] 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.

[0092] In some embodiments, the insulating sheet 221 may be configured as a porous structure, for example, the insulating sheet 221 may include an insulating fabric or an insulating mesh. The insulating fabric may be a woven fabric or a meltblown fabric.

[0093] 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.

[0094] In some embodiments, considering that the greater the thickness of the insulating sheet 221, the smaller the water pressure loss and the lower the risk of clogging, but the greater the thickness of the insulating sheet 221, the larger the distance between two adjacent electrode sheets 222, and thus the greater the resistance between two adjacent electrode sheets 222, resulting in poorer water purification performance, the thickness of the insulating sheet 221 is set to 0.1-1.0 mm in order to comprehensively consider pressure loss and water purification effect; optionally, the thickness of the insulating sheet 221 is specifically set to 0.1 mm, 0.2 mm, 0.3 mm, 0.4 mm, 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1.0 mm, etc.

[0095] In some embodiments, such as Figure 6 and Figure 7 As shown, the first end of the central column 21 is provided with a water outlet 213, and the water outlet 213 is connected to the water outlet channel 211; The water passage 212 is located on the peripheral wall of the second end near the central column 21. 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 212.

[0096] Understandably, considering that the peripheral wall of the existing central column 21 is usually densely covered with multiple water passage holes, the water output from the inner side of the electrode assembly 22 will uniformly enter the water outlet channel through each water passage hole. 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 positioned away from the outlet 213. This design limits the water output from the inner side of the electrode assembly 22 to gradually converge toward the area where the water passage 212 is located, and then sequentially pass through the water passage 212, the water outlet channel 211, and the outlet 213. During the water flow, because the water passage 212 is positioned away from the outlet 213, the flowing water will gradually converge toward 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.

[0097] As can be seen from the above, during the desalination process of the capacitor deion filter, the air bubbles generated inside the filter can be effectively discharged, which can prevent the capacitor deion filter from generating noise during operation, ensure the stability of the internal electric field of the electrode assembly 22, and thus ensure the water purification effect of the capacitor deion filter.

[0098] It should be pointed out here that, as Figure 5 As shown, the capacitor deionization filter 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.

[0099] Furthermore, such as Figure 3 , Figure 6 and Figure 7 As shown, by setting a guide groove 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 guide groove 214, and then guide the collected purified water to the water passage hole 212.

[0100] The depth of the guide groove 214 can be set to 2-5mm.

[0101] In some embodiments, such as Figure 6As 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.

[0102] 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.

[0103] In some embodiments, such as Figure 6 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.

[0104] 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.

[0105] In some embodiments, such as Figure 7 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.

[0106] 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.

[0107] 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.

[0108] 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 mm2. For example, the sum of the water passage areas of the multiple water passage holes 212 is 20 mm2, 25 mm2, 35 mm2 and 50 mm2, etc. This design avoids large flow resistance when water passes through the water passage holes 212 and prevents the water passage holes 212 from restricting the flow of water.

[0109] In some embodiments, in order to ensure the venting effect of the capacitor deionization filter, 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.

[0110] Optionally, the length of the capacitor deionization filter element 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 as possible from the outlet 213 of the capacitor deionization filter element, thereby ensuring the air venting effect.

[0111] In some embodiments, such as Figure 2 , Figure 3 and Figure 5 As shown, the capacitive deionization filter element also includes: a housing 1, having a receiving cavity and an inlet port 101 and an outlet port 102 communicating with the receiving cavity; The filter element body 2 is located in the receiving cavity. A gap is left between the peripheral wall of the filter element body 2 and the inner wall of the receiving cavity. The water inlet port 101 and the gap are in fluid communication, and the water outlet channel 211 and the water outlet port 102 are in fluid communication.

[0112] Specifically, the inlet port 101 and the outlet port 102 are located at the first end of the housing 1 and are connected to the accommodating cavity; the filter element body 2 is disposed inside the housing 1, and the first end of the filter element body 2 and the inner wall of the housing 1 form mutually isolated outlet space 111 and accommodating space 112, with the accommodating space 112 located outside the outlet space 111; a gap is left between the outer side of the filter element body 2 and the inner wall of the housing 1; wherein, the inlet port 101 is connected to the gap, and the outlet port 213, the outlet space 111 and the outlet port 102 are connected in sequence; the positive electrode tab 2001 and the negative electrode tab 2002 of the capacitor deionization filter element both extend into the accommodating space 112, and the positive electrode tab 2001 and the negative electrode tab 2002 are spaced apart and adapted to be connected to an external power source.

[0113] Understandably, a mutually isolated water outlet space 111 and a receiving space 112 are formed between the first end of the filter element body 2 and the inner wall of the first end of the housing 1, and the second end of the filter element body 2 abuts against the inner wall of the second end of the housing 1. Since the positive electrode tab 2001 and the negative electrode tab 2002 of the capacitor deionization filter element are located in the receiving space 112, and the water outlet 213 of the capacitor deionization filter element is located in the water outlet space 111, this design, based on the mutually isolated water outlet space 111 and receiving space 112, achieves water and electricity isolation of the capacitor deionization filter element, ensuring the reliability of the capacitor deionization filter element's water purification operation.

[0114] The accommodating space 112 can accommodate a power connection component 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 electrode tab 2001 of the electrode assembly 22, and the negative terminal 52 is electrically connected to the negative electrode tab 2002 of the electrode assembly 22. This design facilitates the application of voltage from an external power source to the positive and negative electrodes through the power connection component 5.

[0115] In some embodiments, such as Figure 3 and Figure 4 As shown, the inner wall of the housing 1 is provided with a first partition 121 and a second partition 122. The second partition 122 is located outside the first partition 121. The first partition 121 and the first end of the filter element body 2 enclose a water outlet space 111. The first partition 121, the second partition 122 and the first end of the filter element body 2 enclose a receiving space 112.

[0116] Understandably, the first partition 121 and the second partition 122 are respectively disposed on the inner wall of the first end of the housing 1, and the water outlet 102 is disposed at the center of the first end of the housing 1. The first partition 121 and the second partition 122 extend circumferentially relative to the water outlet 102 in 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.

[0117] In practical applications, simply placing the first end of the filter element body 2 against the inner wall of the first end of the housing 1 will create an outlet space 111 and a containment space 112 between the first end of the filter element body 2 and the first end of the housing 1, based on the first partition 121 and the second partition 122.

[0118] In some embodiments, such as Figure 3 , Figure 4 and Figure 9As shown, the capacitor deionization filter element 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 is sealed to the inner side of the second partition 122, and the first cover body 32 is sealed to the first end of the filter element body 2. The positive electrode tab 2001 and the negative electrode tab 2002 are located in the area enclosed by the first sidewall 31 and the first partition 121.

[0119] Understandably, the first cover 32 is disc-shaped and has a central hole. The central hole is coaxially arranged with the water outlet 102. The first sidewall 31 extends circumferentially relative to the central hole. The positive electrode tab 2001, negative electrode tab 2002 and water outlet 213 of the filter element body 2 pass through the central hole.

[0120] When the first end of the filter element body 2 abuts against the inner wall of the first end of the housing 1, the outer side of the first side wall 31 is sealed to the inner side 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 filter element body 2, which can achieve waterproof isolation of the positive electrode tab 2001 and the negative electrode tab 2002.

[0121] Meanwhile, the peripheral wall of the outlet 213 (e.g., the peripheral wall of the first end of the central column 21) and the inner side of the first partition 121 can also be configured to be sealed. This design ensures that the water output from the outlet 213 is discharged directly from the outlet port 102 after entering the outlet space 111, and the water in the outlet space 111 will not flow into the accommodating space 112.

[0122] In some embodiments, such as Figure 3 , Figure 4 and Figure 9 As shown, the first end cap 3 also includes: a first baffle wall 33, which is bent and connected to the first cover body 32. The first cover body 32 and the first end of the filter element body 2 are sealed together by filler glue. The first baffle wall 33 is located on the outer side of the peripheral wall of the filter element body 2. For example, the inner side of the first baffle wall 33 is attached to the peripheral wall of the filter element body 2. Of course, the inner side of the first baffle wall 33 and the peripheral wall of the filter element body 2 can also be spaced apart. A water passage gap is left between the outer side of the first baffle wall 33 and the inner wall of the housing 1, and the water inlet port 101 is connected to the above gap through the water passage gap.

[0123] Understandably, the filler adhesive can be epoxy resin adhesive, and the filler adhesive forms a sealant layer at the first end of the filter element body 2. The first sealant-blocking wall 33 is provided on the outer edge of the first cover 32 and extends circumferentially relative to the central hole. The inner diameter of the first sealant-blocking wall 33 is adapted to the diameter of the filter element body 2.

[0124] The outer side of the first baffle wall 33 may be provided with a protrusion, which abuts against the inner wall of the housing 1, so that a water passage gap is formed between the outer side of the first baffle wall 33 and the inner wall of the housing 1.

[0125] In practical applications, a layer of filler adhesive is first applied to a first region at the first end of the filter element body 2. This first region is positioned opposite the first cover 32 along the axial direction of the central column 21. Then, the first end cap 3 is placed on the first end of the filter element body 2. Since the first baffle wall 33 adheres to the peripheral wall of the filter element body 2 and extends circumferentially relative to the water outlet port 102, the first baffle wall 33 not only prevents the filler adhesive from overflowing to the side of the filter element body 2 but also limits the filter element body 2 radially, ensuring the coaxiality of the filter element body 2 and the water outlet port 102. Next, a layer of filler adhesive is applied to a second region at the first end of the filter element body 2. This second region corresponds to the region where the central hole on the first cover 32 is located, thus completing the sealing of the first end of the filter element body 2.

[0126] Optionally, in order to ensure the sealing effect on the first end of the filter element body 2, the first cover 32 is provided with a first support rib on one side facing the filter element body 2. The first support rib can be configured to extend radially along the central column 21. The first support rib is used to ensure the thickness of the filling adhesive at the first end of the filter element body 2 and to help ensure the molding quality of the filling adhesive.

[0127] Optionally, in order to ensure the molding quality of the filler adhesive, a stop rib is also provided on one side of the first cover 32 facing the filter element body 2. The stop rib is provided on the inner edge of the first cover 32 and extends circumferentially relative to the central hole. The stop rib is used to restrict the flow of the filler adhesive toward the area where the central hole is located.

[0128] In some embodiments, such as Figure 3 , Figure 4 and Figure 10 As shown, the capacitive deionization filter element also includes: a second end cap 4; the second end cap 4 includes a second cover body 41 and a second baffle wall 42 connected by bending. The second cover body 41 is sealed to the second end of the filter element body 2 by a filler adhesive. The second baffle wall 42 is located on the outer side of the peripheral wall of the filter element body 2, for example, the inner side of the second baffle wall 42 is attached to the peripheral wall of the filter element body 2. Of course, the inner side of the second baffle wall 42 and the peripheral wall of the filter element body 2 can also be spaced apart.

[0129] Understandably, the second cover 41 is disc-shaped, and the filler adhesive forms a sealing layer at the second end of the filter element body 2. The second cover 41 is attached to the surface of the sealing layer to achieve a seal at the second end of the filter element body 2.

[0130] The first baffle wall 33 is located on the outer edge of the second cover 41 and extends circumferentially relative to the center of the second cover 41. The inner diameter of the first baffle wall 33 is adapted to the diameter of the filter element body 2. The second baffle wall 42 is used to prevent the filling adhesive from overflowing to the peripheral wall of the filter element body 2.

[0131] Furthermore, the second cover 41 has a first positioning part at its center, and the second baffle wall 42 extends circumferentially relative to the first positioning part.

[0132] A second positioning part is provided at the center of the second end of the filter element body 2, and the first positioning part and the second positioning part are connected; the first baffle wall 33 is sleeved on the peripheral wall of the filter element body 2. The first positioning part includes a positioning protrusion, and the second positioning part includes a positioning groove, with the positioning protrusion inserted into the positioning groove.

[0133] A second support rib may also be provided on one side of the second cover 41 facing the filter element body 2. The second support rib may be configured to extend radially along the central column 21. The second support rib is used to ensure the thickness of the filling adhesive at the second end of the filter element body 2 and to help ensure the molding quality of the filling adhesive.

[0134] In some embodiments, such as Figure 1 As shown, the water purification system also includes a second sterilization element 40; the second sterilization element 40 is disposed on the rear side of the outlet end of the first water path 20 and the second water path 30 along the water flow direction, and is used to sterilize the water output from the first water path 20 and the second water path 30.

[0135] Understandably, the second sterilization element 40 is similar to the first sterilization element 2022. The second sterilization element 40 can also use an ultraviolet sterilization lamp to sterilize the mixed water output from the first water channel 20 and the second water channel 30 by ultraviolet irradiation.

[0136] The second sterilization element 40 can be configured to be electrically connected to the control module, and the control module controls the working state of the second sterilization element 40.

[0137] In some embodiments, such as Figure 1 As shown, the water purification system also includes a temperature control component 50; the temperature control component 50 is located on the rear side of the outlet end of the first water path 20 and the second water path 30 along the water flow direction, and is used to regulate the temperature of the water output from the first water path 20 and the second water path 30; wherein, the temperature control component 50 includes a heating element 501 and / or a cooling element 502.

[0138] Understandably, the temperature control component 50 is used to regulate the temperature of the mixed water output from the first water path 20 and the second water path 30, ensuring that the temperature of the water output from the entire water purification system meets the user's drinking needs.

[0139] The temperature control component 50 includes a heating element 501 and / or a cooling element 502. In practical applications, at least one of the heating element 501 and the cooling element 502 can be controlled to work according to actual needs, so as to regulate the temperature of the water output from the water purification system.

[0140] Among them, the heating element 501 can be an electric heating element, and the cooling element 502 can be a semiconductor cooling element.

[0141] To facilitate more precise control of the water temperature output of the water purification system, a temperature sensor can also be configured in the water purification system. The temperature sensor is located in the water path behind the temperature regulating component 50 along the water flow direction. The temperature sensor is electrically connected to the control module, and the control module is electrically connected to the temperature regulating component 50. The control module can control the working state of the temperature regulating component 50 based on the temperature feedback from the temperature sensor to ensure that the water temperature output by the water purification system reaches the target value or the user's set value.

[0142] 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 system, characterized in that, include: The pre-filter (10) is used to filter and remove impurities from the water. The first water passage (20) includes a first filter element (201), a water tank (202) and a first proportional valve (203) arranged sequentially along the water flow direction. The second water passage (30) includes a second filter element (301) and a second proportional valve (302) arranged sequentially along the water flow direction. The outlet of the pre-filter (10) is connected to the inlet of the first water path (20) and the inlet of the second water path (30), respectively, and the outlet of the first water path (20) and the outlet of the second water path (30) are connected. The first filter element (201) includes a nanofiltration membrane or an RO reverse osmosis membrane, and the second filter element (301) includes a capacitive deionization filter element. The capacitive deionization filter element includes a filter element body (2), which includes a central column (21) and an electrode assembly (22). The central column (21) has a water outlet channel (211) and a water passage hole (212) communicating with the water outlet channel (211). The water passage hole (212) is located on the peripheral wall of the central column (21), and the water outlet channel (211) is located inside the central column (21). The electrode assembly (22) is wound around the peripheral wall of the central column (21). The two ends of the electrode assembly (22) along the axial direction of the central column (21) are sealed. The outer side of the electrode assembly (22) is used to receive the input of raw water, and the inner side of the electrode assembly (22) is used to output purified water or wastewater. The first end of the central column (21) is provided with a water outlet (213), which is connected to the water outlet channel (211); the water passage hole (212) is provided on the peripheral wall near the second end of the central column (21), and the peripheral wall of the central column (21) is provided with a guide groove (214). The guide groove (214) extends along the axial direction of the central column (21), one end of the guide groove (214) is provided on the peripheral wall near the first end of the central column (21) and is connected to the water passage hole (212), and the other end of the guide groove (214) is provided on the peripheral wall near the second end of the central column (21).

2. The water purification system according to claim 1, characterized in that, Also includes: The first TDS sensor (100) is used to collect the TDS value of the water output from the first filter element (201); The second TDS sensor (200) is used to collect the TDS value of the water output from the second filter element (301); The control module is electrically connected to the first TDS sensor (100), the second TDS sensor (200), the first proportional valve (203), and the second proportional valve (302), respectively. The control module is used to control the opening degree of the first proportional valve (203) and the second proportional valve (302) according to the TDS values ​​fed back by the first TDS sensor (100) and the second TDS sensor (200).

3. The water purification system according to claim 2, characterized in that, Also includes: The third TDS sensor (300) is used to collect the TDS value of the water body received by the pre-filter (10); The control module is electrically connected to the third TDS sensor (300) and the capacitor deionization filter element respectively. The control module is used to control the polarity of the voltage connected to the capacitor deionization filter element so that the capacitor deionization filter element works in a water purification state or a regeneration state. When the TDS value fed back by the third TDS sensor (300) is greater than the first preset value, the control module controls the capacitive deionization filter to work in the water purification state; When the capacitor deionization filter element is in the regeneration state, the control module is also used to control the capacitor deionization filter element to stop working or control the capacitor deionization filter element to work in the water purification state when the difference between the TDS values ​​fed back by the second TDS sensor (200) and the third TDS sensor (300) is less than a second preset value.

4. The water purification system according to claim 1, characterized in that, The electrode assembly (22) includes an insulating sheet (221) and at least two layers of electrode sheets (222). The insulating sheet (221) and the electrode sheets (222) are stacked, with the insulating sheet (221) sandwiched between two adjacent layers of electrode sheets (222). Each 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 layers of electrode sheets (222) are respectively configured as a positive electrode and a negative electrode, and a water passage (2201) for accommodating the insulating sheet (221) is formed between the positive electrode and the negative electrode. The electrode assembly (22) is formed as an outlet end and an inlet end at its inner and outer ends relative to the central column (21); the inlet end is connected to the outlet end through the water passage (2201), and the outlet end extends toward the peripheral wall of the central column (21) and forms a fluid communication with the water passage hole (212).

5. The water purification system according to claim 1, characterized in that, The capacitor deionization filter element further includes: a housing (1) having a receiving cavity and an inlet port (101) and an outlet port (102) communicating with the receiving cavity. The filter element body (2) is disposed in the accommodating cavity. A gap is left between the peripheral wall of the filter element body (2) and the inner wall of the accommodating cavity. The water inlet port (101) and the gap are in fluid communication. The water outlet channel (211) and the water outlet port (102) are in fluid communication.

6. The water purification system according to any one of claims 1 to 5, characterized in that, The water tank (202) includes: The container (2021) is used to hold the water purified by the first filter element (201); The first sterilization component (2022) is connected to the box (2021) and is used to sterilize the water in the box (2021); A liquid level detection component (2023) is connected to the tank (2021) and is used to detect the water level information inside the tank (2021).

7. The water purification system according to any one of claims 1 to 5, characterized in that, The first water path (20) also includes a booster pump (204), which is located on the inlet side of the first filter element (201) along the water flow direction; And / or, the first water path (20) further includes a water pump (205), which is located between the water tank (202) and the first proportional valve (203) along the water flow direction.

8. The water purification system according to any one of claims 1 to 5, characterized in that, The pre-filter (10) includes any one of PP cotton filter, carbon rod filter or carbon fiber filter.

9. The water purification system according to any one of claims 1 to 5, characterized in that, Also includes: The second sterilization component (40) is disposed on the rear side of the outlet end of the first water path (20) and the second water path (30) along the water flow direction, and is used to sterilize the water output from the first water path (20) and the second water path (30).

10. The water purification system according to any one of claims 1 to 5, characterized in that, Also includes: Temperature control component (50) is located on the rear side of the outlet end of the first water path (20) and the second water path (30) along the water flow direction, and is used to regulate the temperature of the water output from the first water path (20) and the second water path (30); The temperature control component (50) includes a heating element (501) and / or a cooling element (502).

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