Water purification system

Abstract

The utility model relates to the technical field of water purification, and provides a water purification system which comprises a front filter element, a plurality of capacitive deionization filter elements, a three-way valve and a two-way valve, each capacitive deionization filter element is provided with a water inlet port and a water outlet port used for outputting purified water or waste water, the multiple capacitive deionization filter elements are sequentially connected in series, and the front filter element is connected to the front side of the first capacitive deionization filter element in series; the three-way valve is connected in series between two adjacent capacitive deionization filter elements, and is communicated with the water outlet port of the last capacitive deionization filter element in the plurality of capacitive deionization filter elements; the front filter element is respectively communicated with water inlet ports of all capacitive deionization filter elements except the first capacitive deionization filter element in the plurality of capacitive deionization filter elements through a two-way valve. According to the water purification system disclosed by the utility model, different effluent qualities meeting requirements can be conveniently output to a user, and each capacitive deionization filter element can quickly complete regeneration, so that the water purification system can conveniently work in a water purification mode for a long time, and water meeting actual requirements is supplied to the user.

Description

Technical Field

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

[0002] In domestic water use, the current mainstream solutions for filtering charged ions in water include ultrafiltration, nanofiltration, and reverse osmosis. Among them, reverse osmosis technology has become the market's first choice due to its excellent filtering effect (99%). However, the same problem is that with the improvement of people's awareness of drinking water and the attention to drinking water health, the reverse osmosis effluent is too pure and does not retain the mineral ions beneficial to the human body, and it is impossible to output different water qualities that meet the user's needs. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems existing in the related art. For this purpose, the utility model provides a water purification system, which can not only utilize the physical filtering function of the pre-filter to remove impurities in the water body, but also control the operation of one or more capacitive deionization filters according to actual needs to perform desalination treatment on the water body, ensuring that different water qualities that meet the requirements are output to users.

[0004] The water purification system according to the first aspect embodiment of the utility model includes:

[0005] A pre-filter and a plurality of capacitive deionization filters. The capacitive deionization filter has a water inlet port and a water outlet port for outputting purified water or wastewater. The plurality of capacitive deionization filters are connected in series in sequence, and the pre-filter is connected in series on the front side of the first one of the plurality of capacitive deionization filters;

[0006] A three-way valve, which is connected in series between two adjacent capacitive deionization filters and is communicated with the water outlet port of the last one of the plurality of capacitive deionization filters;

[0007] A two-way valve, through which the pre-filter is respectively communicated with the water inlet ports of each capacitive deionization filter except the first one of the plurality of capacitive deionization filters;

[0008] Wherein, when the capacitive deionization filter is in the purified water state, the two-way valve is cut off, and the three-way valve is used to realize the connection between two adjacent capacitive deionization filters;

[0009] When the capacitive deionization filter is in the regeneration state, the two-way valve is turned on, and the three-way valve is used to realize the connection between the previous capacitive deionization filter connected to it and the water outlet port of the last one of the plurality of capacitive deionization filters.

[0010] According to an embodiment of the present utility model, the capacitive deionization filter element includes a filter element body, and the filter element body includes a central column and an electrode assembly;

[0011] The central column has a water outlet channel and water passing holes communicating with the water outlet channel. The water passing holes are provided on the peripheral wall of the central column, and the water outlet channel is provided inside the central column and forms a fluid connection with the water outlet port;

[0012] The electrode assembly is wound around the peripheral wall of the central column. Both ends of the electrode assembly along the axial direction of the central column are sealed. The outside of the electrode assembly is used to receive the input of raw water, and the inside of the electrode assembly is used to output purified water or wastewater.

[0013] According to an embodiment of the present utility model, the electrode assembly includes an insulating sheet and at least two layers of electrode sheets. The insulating sheet and the electrode sheets are arranged in a laminated manner, and the insulating sheet is clamped between adjacent two layers of the electrode sheets; the electrode sheet includes a current collector layer and an adsorption layer, and the adsorption layers are provided on both the front and back sides of the current collector layer; adjacent two layers of the electrode sheets are respectively configured as a positive electrode sheet and a negative electrode sheet, and a water passing channel for accommodating the insulating sheet is formed between the positive electrode sheet and the negative electrode sheet;

[0014] The inner and outer ends of the electrode assembly corresponding to the central column are respectively formed as a water outlet end and a water inlet end; the water inlet end is communicated with the water outlet end through the water passing channel, and the water outlet end extends to the peripheral wall of the central column and forms a fluid connection with the water passing holes.

[0015] According to an embodiment of the present utility model, a water outlet is provided at the first end of the central column, and the water outlet is communicated with the water outlet channel;

[0016] The water passing holes are provided on the peripheral wall near the second end of the central column, and a diversion groove is provided on the peripheral wall of the central column, and a fluid connection is formed between the diversion groove and the water passing holes.

[0017] According to an embodiment of the present utility model, the capacitive deionization filter element further includes: a housing having an accommodation cavity, and the water inlet port and the water outlet port communicating with the accommodation cavity;

[0018] The filter element body is arranged in the accommodation cavity, and a gap is left between the peripheral wall of the filter element body and the inner wall of the accommodation cavity. A fluid connection is formed between the water inlet port and the gap, and a fluid connection is formed between the water outlet channel and the water outlet port.

[0019] According to an embodiment of the present utility model, the water purification system further includes:

[0020] A post-filter element, which is connected in series behind the last one of a plurality of the capacitive deionization filter elements.

[0021] According to an embodiment of the present utility model, the water purification system further includes:

[0022] A flow meter, connected in series on the output side of the post-filter element, for collecting the water output flow of the post-filter element;

[0023] A flow regulating valve, connected in series between the capacitive deionization filter element and the post-filter element;

[0024] A control module, respectively connected to the flow meter and the flow regulating valve, and the control module is used to control the opening degree of the flow regulating valve according to the flow information fed back by the flow meter.

[0025] According to an embodiment of the present utility model, the water purification system further includes:

[0026] A first TDS sensor, for collecting the TDS value of the raw water received by the pre-filter element;

[0027] A second TDS sensor, for collecting the TDS value of the water body output by each capacitive deionization filter element;

[0028] A control module, electrically connected to the controlled ends of the first TDS sensor, the second TDS sensor and each capacitive deionization filter element respectively, and the control module is used to control the working state of each capacitive deionization filter element according to the TDS value fed back by the first TDS sensor and / or the second TDS sensor.

[0029] According to an embodiment of the present utility model, the pre-filter element includes any one of a PP cotton filter element, a carbon rod filter element or a carbon fiber filter element, or the pre-filter element includes multiple layers of filter elements, and the multiple layers of filter elements are sleeved together in sequence from the inside to the outside, and each layer of filter element includes any one of a PP cotton filter element, a carbon rod filter element or a carbon fiber filter element; the post-filter element includes any one of a carbon rod filter element or a carbon fiber filter element.

[0030] According to an embodiment of the present utility model, the water purification system further includes:

[0031] A sterilization component, connected in series on the output side of the post-filter element, for performing sterilization treatment on the purified water output by the post-filter element.

[0032] One or more of the above technical solutions in the embodiments of the present utility model have at least one of the following technical effects: when the water purification system operates in the water purification mode, the two-way valve can be controlled to be cut off, and the three-way valve can be controlled to be in the first state, so that the water outlet port of the previous capacitive deionization filter element is communicated with the water inlet port of the next capacitive deionization filter element. At this time, the filter element bodies of each capacitive deionization filter element are sequentially formed in fluid communication. According to actual needs, a positive voltage can be applied to one or more of the multiple capacitive deionization filter elements, and the capacitive deionization filter element receiving the positive voltage can perform desalination treatment on the water body in sequence. The other capacitive deionization filter elements that do not receive the positive voltage only serve as flow channels for the water body to flow through. This design can output different water outlet qualities that meet the needs to users according to actual needs.

[0033] When the water purification system operates in the wastewater mode, the two-way valve can be controlled to be conducted, and the three-way valve can be controlled to be in the second state, so that the water body output by the pre-filter is sequentially supplied to the water inlet ports of each capacitive deionization filter element, and the water outlet ports of each capacitive deionization filter element are respectively communicated with the water outlet port of the last one among the multiple capacitive deionization filter elements, that is, the multiple capacitive deionization filter elements are arranged in parallel; this design when the water purification system operates in the wastewater mode, each capacitive deionization filter element directly receives the water body purified by the pre-filter, which is beneficial to shortening the working time of each capacitive deionization filter element when it is in the regeneration state.

[0034] As can be seen from the above, the water purification system shown in the present utility model can utilize the physical filtration function of the pre-filter to remove impurities in the water body, can control one or more capacitive deionization filter elements to work according to actual needs, perform desalination treatment on the water body, ensure that different water outlet qualities that meet the needs are output to users, and each capacitive deionization filter element can be quickly regenerated, which is convenient for the water purification system to operate in the water purification mode for a long time and supply water bodies that meet actual needs to users.

[0035] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. Description of the Drawings

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or related technologies, the following will briefly introduce the drawings required for use in the description of the embodiments or related technologies. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0037] Figure 1 It is a schematic diagram of the water circuit structure of the water purification system provided by the embodiment of the present utility model;

[0038] Figure 2 It is one of the schematic structural diagrams of the capacitive deionization filter element provided by the embodiment of the present utility model;

[0039] Figure 3 It is the second of the schematic structural diagrams of the capacitive deionization filter element provided by the embodiment of the present utility model;

[0040] Figure 4 It is the third of the schematic structural diagrams of the capacitive deionization filter element provided by the embodiment of the present utility model;

[0041] Figure 5 It is the schematic structural diagram of the filter element body provided by the embodiment of the present utility model;

[0042] Figure 6 It is one of the schematic structural diagrams of the central column provided by the embodiment of the present utility model;

[0043] Figure 7 It is the second of the schematic structural diagrams of the central column provided by the embodiment of the present utility model;

[0044] Figure 8 It is the schematic structural diagram of winding the electrode assembly around the central column provided by the embodiment of the present utility model;

[0045] Figure 9 It is the schematic structural diagram of the first end cap provided by the embodiment of the present utility model;

[0046] Figure 10 It is the schematic structural diagram of the second end cap provided by the embodiment of the present utility model;

[0047] Figure 11 It is the schematic cross-sectional view of the laminated arrangement of the electrode assembly provided by the embodiment of the present utility model;

[0048] Figure 12 It is the schematic cross-sectional view of the electrode plate provided by the embodiment of the present utility model;

[0049] Reference numerals:

[0050] 1, capacitive deionization filter element; 2, pre-filter element; 3, post-filter element; 4, three-way valve; 5, two-way valve; 6, flow meter; 7, flow regulating valve; 8, pressure stabilizing valve; 9, sterilizing member; 100, first TDS sensor; 200, second TDS sensor;

[0051] 11, housing; 1101, water inlet port; 1102, water outlet port; 1111, water outlet space; 1112, accommodating space; 1121, first partition; 1122, second partition;

[0052] 12. Filter element body; 121. Central column; 122. Electrode assembly; 1211. Water outlet channel; 1212. Water passing hole; 1213. Water outlet; 1214. Diversion groove; 11221. Insulating sheet; 222. Electrode plate; 12201. Water passing channel; 12221. Current collector layer; 12222. Adsorption layer; 1201. Positive electrode tab; 1202. Negative electrode tab;

[0053] 13. First end cap; 131. First side wall; 132. First cover body; 133. First rubber blocking wall;

[0054] 14. Second end cap; 141. Second cover body; 142. Second rubber blocking wall;

[0055] 15. Power connection assembly; 151. Positive terminal; 152. Negative terminal. Detailed implementation manners

[0056] The following further describes in detail the implementation manners of the present utility model in conjunction with the drawings and embodiments. The following embodiments are used to illustrate the present utility model, but cannot be used to limit the scope of the present utility model.

[0057] In the description of the embodiments of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiments of the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0058] In the description of the embodiments of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present utility model can be understood according to specific situations.

[0059] In the embodiments of the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature has a lower horizontal height than the second feature.

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

[0061] The following combines Figures 1-12 , and details the water purification system provided by the embodiments of the present utility model through specific embodiments and their application scenarios.

[0062] As Figure 1 shown, the embodiments of the present utility model provide a water purification system, including: a pre-filter 2, a plurality of capacitive deionization filters 1, a three-way valve 4, and a two-way valve 5;

[0063] The capacitive deionization filter 1 has a water inlet port 1101 and a water outlet port 1102 for outputting purified water or wastewater. A plurality of capacitive deionization filters 1 are connected in series in sequence, and the pre-filter 2 is connected in series on the front side of the first one of the plurality of capacitive deionization filters 1;

[0064] The three-way valve 4 is connected in series between two adjacent capacitive deionization filters 1 and is communicated with the water outlet port 1102 of the last one of the plurality of capacitive deionization filters 1; the pre-filter 2 is respectively communicated with the water inlet ports 1101 of each capacitive deionization filter 1 except the first one of the plurality of capacitive deionization filters 1 through the two-way valve 5;

[0065] Wherein, when the capacitive deionization filter 1 is in the purified water state, the two-way valve 5 is closed, and the three-way valve 4 is used to realize the communication between two adjacent capacitive deionization filters 1;

[0066] When the capacitive deionization filter element 1 is in the regeneration state, the two-way valve 5 is turned on, and the three-way valve 4 is used to realize the connection between the previous capacitive deionization filter element 1 connected to it and the water outlet port 1102 of the last one among the multiple capacitive deionization filter elements 1.

[0067] It can be understood that the pre-filter element 2 is used to filter and remove impurities from the input raw water. According to the material selected for the pre-filter element 2, the pre-filter element 2 includes any one of a PP cotton filter element, a carbon rod filter element, or a carbon fiber filter element. Alternatively, the pre-filter element 2 includes multiple layers of filter elements, and the multiple layers of filter elements are sleeved together in sequence from the inside to the outside. Each layer of the filter element includes any one of a PP cotton filter element, a carbon rod filter element, or a carbon fiber filter element; among them, the types of adjacent two layers of filter elements are different; for example, when the pre-filter element 2 is a two-layer filter element, the filter element in the outer layer can be a PP cotton filter element, and the filter element in the outer layer can be a carbon rod filter element or a carbon fiber filter element.

[0068] The number of capacitive deionization filter elements 1 is greater than or equal to two. The capacitive deionization filter element 1 includes an electrode assembly 122 wound into a column shape. The electrode assembly 122 generally includes a positive electrode plate and a negative electrode plate arranged in a stacked manner. The positive electrode plate and the negative electrode plate are isolated from each other, and a flow channel for the water body to flow is formed between the positive electrode plate and the negative electrode plate. When a positive voltage is applied to the positive electrode plate and the negative electrode plate, the capacitive deionization filter element 1 is in the water purification state. At this time, cations, anions, or charged particles in the water body will migrate to the surfaces of the positive electrode plate and the negative electrode plate under the action of the electric field force, so that the water outlet port 1102 of the capacitive deionization filter element 1 outputs purified water after desalination treatment; when a negative voltage is applied to the positive electrode plate and the negative electrode plate, the capacitive deionization filter element 1 is in the regeneration state. At this time, the anions, cations, or charged particles adsorbed on the surfaces of the positive electrode plate and the negative electrode plate will automatically detach, so that the water outlet port 1102 of the capacitive deionization filter element 1 outputs wastewater with a higher concentration.

[0069] The two-way valve 5 can be a one-position two-way solenoid valve, and the two-way valve 5 is marked as K1 in Figure 1 ; the three-way valve 4 can be a two-position three-way solenoid valve. There are multiple three-way valves 4, and the multiple three-way valves 4 are marked as S1, S2,... Sn in Figure 1 in sequence, where n is a natural number greater than or equal to 2; the number of three-way valves 4 is the number of capacitive deionization filter elements 1 - 1; the two-way valve 5 and the three-way valve 4 can be respectively configured to be electrically connected to the control module, and the control module controls the working states of the two-way valve 5 and the three-way valve 4.

[0070] When the water purification system operates in the water purification mode, the two-way valve 5 can be controlled to be cut off, and the three-way valve 4 can be controlled to be in the first state, so that the water outlet port 1102 of the previous capacitive deionization filter element 1 is communicated with the water inlet port 1101 of the next capacitive deionization filter element 1. At this time, the filter element bodies 12 of the respective capacitive deionization filter elements 1 are sequentially formed in fluid communication. According to actual needs, a positive voltage can be applied to one or more of the plurality of capacitive deionization filter elements 1, and the capacitive deionization filter element 1 receiving the positive voltage sequentially performs desalination treatment on the water body, and the other capacitive deionization filter elements 1 not receiving the positive voltage only serve as flow channels for the water body to flow through. This design can output different water outlet qualities that meet the needs to users according to actual needs.

[0071] When the water purification system operates in the wastewater mode, the two-way valve 5 can be controlled to be conducted, and the three-way valve 4 can be controlled to be in the second state, so that the water body output by the pre-filter 2 is sequentially supplied to the water inlet ports 1101 of the respective capacitive deionization filter elements 1, and the output ports of the respective capacitive deionization filter elements 1 are respectively communicated with the water outlet port 1102 of the last one among the plurality of capacitive deionization filter elements 1, that is, the plurality of capacitive deionization filter elements 1 are arranged in parallel; this design enables each capacitive deionization filter element 1 to directly receive the water body purified by the pre-filter 2 when the water purification system operates in the wastewater mode, which is beneficial to shortening the working time of each capacitive deionization filter element 1 when it is in the regeneration state.

[0072] In some embodiments, as Figure 3 , Figure 5 and Figure 7 shown, the capacitive deionization filter element 1 includes a filter element body 12, and the filter element body 12 includes a central column 121 and an electrode assembly 122;

[0073] The central column 121 has a water outlet channel 1211 and water passing holes 1212 communicated with the water outlet channel 1211. The water passing holes 1212 are arranged on the peripheral wall of the central column 121, and the water outlet channel 1211 is arranged inside the central column 121 and forms fluid communication with the water outlet port 1102;

[0074] The electrode assembly 122 is wound around the peripheral wall of the central column 121, and both ends of the electrode assembly 122 along the axial direction of the central column 121 are sealed. The outside of the electrode assembly 122 is used for receiving the input of raw water, and the inside of the electrode assembly 122 is used for outputting purified water or wastewater.

[0075] It can be understood that, as Figure 8 shown, when winding the electrode assembly 122, the inner side surface of one end of the electrode assembly 122 contacts the peripheral wall of the central column 121, and then, with the central column 121 as the central axis, the electrode assembly 122 is wound layer by layer until the electrode assembly 122 is wound into a columnar distribution form.

[0076] One end of the central column 121 is closed, and the other end of the central column 121 forms a water outlet 1213 communicating with the water outlet channel 1211, and a fluid communication is formed between the water outlet 1213 and the water outlet port 1102.

[0077] In actual work, raw water enters the electrode assembly 122 from the outside of the electrode assembly 122, and then flows along the flow channel between the positive electrode plate and the negative electrode plate of the electrode assembly 122 until it reaches the inside of the electrode assembly 122; then, the water body output by the electrode assembly 122 enters the water outlet channel 1211 from the water passing hole 1212 and is discharged from the water outlet 1213.

[0078] In some embodiments, such as Figure 5 、 Figure 11 and Figure 12 as shown, the electrode assembly 122 includes an insulating sheet 11221 and at least two layers of electrode sheets 222. The insulating sheet 11221 and the electrode sheets 222 are arranged in a laminated manner, and the insulating sheet 11221 is sandwiched between two adjacent layers of electrode sheets 222; the electrode sheet 222 includes a current collector layer 12221 and an adsorption layer 12222, and the adsorption layers 12222 are provided on both the front and back sides of the current collector layer 12221; two adjacent layers of electrode sheets 222 are respectively configured as a positive electrode plate and a negative electrode plate, and a water passing channel 12201 for accommodating the insulating sheet 11221 is formed between the positive electrode plate and the negative electrode plate;

[0079] The inner and outer ends of the electrode assembly 122 corresponding to the central column 121 are respectively formed as a water outlet end and a water inlet end; the water inlet end is communicated with the water outlet end through the water passing channel 12201, and the water outlet end extends to the peripheral wall of the central column 121 and forms a fluid communication with the water passing hole 1212.

[0080] It can be understood that the insulating sheet 11221 and the electrode sheets 222 are stacked in an alternating arrangement to realize that the insulating sheet 11221 is sandwiched between two adjacent layers of electrode sheets 222. Since two adjacent layers of electrode sheets 222 are respectively configured as a positive electrode plate and a negative electrode plate, when the number of electrode sheets 222 is greater than two layers, in order to meet the water filtration requirement of the electrode assembly 122 for raw water, when designing the power supply of the electrode assembly 122, the positive electrode plate and the negative electrode plate can be alternately arranged in sequence according to the stacking direction, the insulating sheet 11221 is sandwiched between the positive electrode plate and the negative electrode plate, and the current collector layer 12221 of the positive electrode plate is electrically connected to the positive electrode of the power supply, and the current collector layer 12221 of the negative electrode plate is electrically connected to the negative electrode of the power supply. When the number of electrode sheets 222 is equal to two layers, the insulating sheet 11221 can be directly sandwiched between the positive electrode plate and the negative electrode plate.

[0081] For the electrode sheet 222, the current collector layer 12221 of the electrode sheet 222 can be made of metal or graphite material so that the current collector layer 12221 is formed into a conductive layer, and the adsorption layer 12222 of the electrode sheet 222 can be made of activated carbon and other adsorption materials to adsorb ions in raw water.

[0082] At the same time, the insulating sheet 11221 can be made of plastic material. The insulating sheet 11221 is used to play a supporting role between the positive electrode sheet and the negative electrode sheet, not only preventing the positive electrode sheet and the negative electrode sheet from being short-circuited, but also ensuring that a water passage 12201 is formed between the positive electrode sheet and the negative electrode sheet.

[0083] In practical applications, the operation of the capacitive deionization filter element 1 includes an adsorption purification process and a desorption regeneration process. When adjacent two layers of electrode sheets 222 are electrically connected to the positive and negative electrodes of the power supply and the power supply is started to supply power, anions and cations in the raw water are attracted to the electrode sheets 222 with opposite charges and are adsorbed by the adsorption layer 12222 on the electrode sheets 222. This operation process of the capacitive deionization filter element 1 is the adsorption purification process.

[0084] Correspondingly, when a reverse voltage is applied to adjacent two layers of electrode sheets 222, the ions adsorbed by the adsorption layer 12222 are detached into the water body of the water passage 12201. At this time, the water passage 12201 will output concentrated water containing a higher ion concentration.

[0085] As can be seen from the above, for the capacitive deionization filter element 1 shown in this embodiment, by arranging the adsorption layer 12222 on the front and back sides of the current collector layer 12221, an integrated design of the electrode sheet 222 is realized. Only by stacking the electrode sheet 222 and the insulating sheet 11221 in an alternating arrangement can the electrode assembly 122 be formed; this stacked arrangement design of the electrode assembly 122 simplifies the arrangement structure of the electrode assembly 122, is convenient for processing and production, and is beneficial to reducing production costs.

[0086] At the same time, in practical applications, only by electrically connecting adjacent two layers of electrode sheets 222 to the positive and negative electrodes of the power supply can the ions in the raw water passing through the water passage 12201 be adsorbed and processed to achieve the purpose of purifying the raw water; since the adsorption layer 12222 is provided on both sides of the current collector layer 12221 of each electrode sheet 222, both sides of each electrode sheet 222 can adsorb ions, thus ensuring the purification effect of the raw water to a certain extent. The capacitive deionization filter element 1 can effectively remove heavy metal ions in water and retain beneficial ions required by the human body to meet the needs of household water purification.

[0087] In some embodiments, such as Figure 11As shown, in order to ensure the purification effect of the raw water, two adjacent electrode sheets 222 are arranged oppositely along the stacking direction, so as to ensure the coverage range of the electric field between 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 two adjacent electrode sheets 222.

[0088] Furthermore, by arranging the insulating sheet 11221 and the electrode sheet 222 in a dislocation manner along the stacking direction, the electrode sheet 222 is hidden between two adjacent insulating sheets 11221. This design not only ensures the electrical isolation between two adjacent electrode sheets 222, but also facilitates the arrangement of the water outlet end of the electrode assembly 122 at a position opposite to the water passing hole 1212 on the peripheral wall of the central column 121, so as to ensure the fluid communication between the water passing channel 12201 in the electrode assembly 122 and the water outlet channel 1211 in the central column 121. Wherein, the stacking direction is along the thickness direction of the insulating sheet 11221 or the electrode sheet 222.

[0089] In some embodiments, as Figure 8 shown, in order to facilitate the connection of two adjacent electrode sheets 222 to the positive and negative electrodes of the power supply, the electrode assembly 122 further includes: a positive electrode tab 1201 and a negative electrode tab 1202; the positive electrode tab 1201 is electrically connected to the current collector layer 12221 of the positive electrode sheet; the negative electrode tab 1202 is electrically connected to the current collector layer 12221 of the negative electrode sheet.

[0090] Specifically, a first extension portion is provided on one side edge of the current collector layer 12221 of each positive electrode sheet, and a second extension portion is provided on one side edge of the current collector layer 12221 of each negative electrode sheet; when the electrode assembly 122 is wound around the peripheral wall of the central column 121, the first extension portions of the positive electrode sheets are stacked to form the positive electrode tab 1201, and the second extension portions of the negative electrode sheets are stacked to form the negative electrode tab 1202.

[0091] In some embodiments, the current collector layer 12221 includes any one of copper foil, titanium foil and graphite paper, and the current collector layer 12221 is configured to be electrically connected to the positive or negative electrode of the power supply.

[0092] The adsorption layer 12222 is attached to the surface of the current collector layer 12221. The adsorption layer 12222 includes an activated carbon layer, and the activated carbon layer has excellent adsorption performance and can adsorb ions in the raw water.

[0093] In some embodiments, since the thickness of the current collector layer 12221 of the electrode sheet 222 determines the support strength, winding difficulty, and cost of the electrode sheet 222, if the current collector layer 12221 is too thin, the current collector layer 12221 is prone to damage, and if the current collector layer 12221 is too thick, the cost of the electrode sheet 222 is too high. Therefore, the thickness of the current collector layer 12221 is set to 15 - 50 microns; optionally, the thickness of the current collector layer 12221 is specifically 25 microns, 30 microns, 35 microns, 40 microns, 45 microns, 50 microns, etc.

[0094] Meanwhile, since the thickness of the adsorption layer 12222 of the electrode sheet 222 determines the adsorption capacity and adsorption speed, however, if the adsorption layer 12222 is too thick, the adsorption layer 12222 will crack during winding. Therefore, the thickness of the adsorption layer 12222 is set to 25 - 200 microns; optionally, the thickness of the adsorption layer 12222 is specifically 25 microns, 30 microns, 50 microns, 65 microns, 100 microns, 150 microns, 185 microns, 200 microns, etc.

[0095] In some embodiments, the insulating sheet 11221 can be configured as a porous structure. For example, the insulating sheet 11221 includes insulating fabric or insulating grid. The insulating fabric can be woven fabric or meltblown fabric.

[0096] Thus, although the insulating sheet 11221 is disposed in the water passage 12201, since the insulating sheet 11221 is a porous structure, the insulating sheet 11221 does not affect the migration of ions between two adjacent electrode sheets 222, and thus does not affect the adsorption of ions in the water body by the adsorption layer 12222 of the electrode sheet 222. The insulating sheet 11221 ensures the uniform flow of water in the water passage 12201, and can ensure the adsorption effect of the adsorption layer 12222 on ions to a certain extent.

[0097] In some embodiments, considering that the greater the thickness of the insulating sheet 11221, the smaller the water flow pressure loss and the lower the blockage risk. However, the greater the thickness of the insulating sheet 11221, the greater 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. Therefore, in order to comprehensively consider the pressure loss and water purification effect, the thickness of the insulating sheet 11221 is set to 0.1 - 1.0 mm; optionally, the thickness of the insulating sheet 11221 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.

[0098] In some embodiments, such as Figure 3 、 Figure 6 and Figure 7As shown in the figure, a water outlet 1213 is provided at the first end of the central column 121, and the water outlet 1213 is communicated with the water outlet channel 1211; a water passing hole 1212 is provided on the peripheral wall near the second end of the central column 121, and a diversion groove 1214 is provided on the peripheral wall of the central column 121, and a fluid communication is formed between the diversion groove 1214 and the water passing hole 1212.

[0099] It can be understood that considering that the peripheral wall of the existing central column 121 is usually densely provided with a plurality of water passing holes, the water output from the inner side of the electrode assembly 122 will uniformly pass through each water passing hole and enter the water outlet channel. If there are bubbles in the electrode assembly 122, the bubbles may adhere to the surface of the positive electrode plate and / or the negative electrode plate, and the flowing water body will not act on the desorption of the bubbles. However, in the present application, by arranging the water passing hole 1212 on the peripheral wall near the second end of the central column 121, the water passing hole 1212 is arranged far away from the water outlet 1213. This design can limit the water output from the inner side of the electrode assembly 122 to gradually converge towards the area where the water passing hole 1212 is located, and then pass through the water passing hole 1212, the water outlet channel 1211 and the water outlet in sequence. Then, during the flow of the water body, since the water passing hole 1212 is arranged far away from the water outlet 1213, the flowing water body will gradually converge towards the area where the water passing hole 1212 is located, which will gradually squeeze the bubbles generated in the electrode assembly 122 towards the area where the water passing hole 1212 is located, and then enter the water outlet channel 1211 from the water passing hole 1212 and be discharged together with the water body, thereby effectively removing the bubbles appearing in the capacitive deionization filter element 1.

[0100] As can be seen from the above, during the desalination process of the capacitive deionization filter element 1, the bubbles generated in the filter element can be effectively discharged, which can prevent the capacitive deionization filter element 1 from generating noise during operation, ensure the stability of the internal electric field of the electrode assembly 122, and thus ensure the water purification treatment effect of the capacitive deionization filter element 1.

[0101] At the same time, by arranging the diversion groove 1214 on the peripheral wall of the central column 121, it is possible to avoid the gap between the inner side of the electrode assembly 122 and the peripheral wall of the central column 121 from being too small to cause water flow restriction, so as to facilitate collecting the purified water output from the inner side of the electrode assembly 122 by means of the diversion groove 1214 and then diverting the collected purified water to the water passing hole 1212.

[0102] Among them, the depth of the diversion groove 1214 can be set to 2-5 mm.

[0103] In some embodiments, since the length of the central column 121 is substantially the same as the axial length of the electrode assembly 122 along the central axis, one end of the diversion groove 1214 is provided on the peripheral wall near the first end of the central column 121, and the other end is provided on the peripheral wall near the second end of the central column 121. The diversion groove 1214 can effectively collect the purified water output from the inside of the electrode assembly 122 at various positions along the axial direction of the central column 121, ensuring the diversion effect on the purified water.

[0104] Among them, the diversion groove 1214 can be configured to be provided on the peripheral wall of the central column 121 along a spiral trajectory or along a straight trajectory, and no specific limitation is made thereto.

[0105] In some embodiments, as Figure 6 shown, the diversion groove 1214 is configured to extend along the axial direction of the central column 121. This design can effectively reduce the diversion path of the purified water and is also convenient for processing the diversion groove 1214.

[0106] At the same time, since the inner and outer ends of the electrode assembly 122 relative to the central column 121 are correspondingly formed as the water outlet end and the water inlet end, and the electrode assembly 122 is configured to be wound around the peripheral wall of the central column 121, the water outlet end of the electrode assembly 122 extends along the axial direction of the central column 121. By setting the diversion groove 1214 to extend along the axial direction of the central column 121, it is convenient to relatively arrange the diversion groove 1214 with the water outlet end of the electrode assembly 122, ensuring the diversion effect on the purified water.

[0107] In some embodiments, as Figure 7 shown, in order to enhance the diversion effect on the purified water, a plurality of diversion grooves 1214 and water passing holes 1212 are provided. The plurality of diversion grooves 1214 and the plurality of water passing holes 1212 are relatively arranged, and at least part of the plurality of water passing holes 1212 are arranged along the circumferential direction of the central column 121.

[0108] Optionally, each diversion groove 1214 can be configured to form a fluid communication with a plurality of water passing holes 1212 arranged along the axial direction of the central column 121, and each diversion groove 1214 extends along the axial direction of the central column 121.

[0109] Optionally, the plurality of diversion grooves 1214 and the plurality of water passing holes 1212 are arranged in a one-to-one correspondence. The plurality of water passing holes 1212 are arranged along the circumferential direction of the central column 121, and the plurality of diversion grooves 1214 are also arranged along the circumferential direction of the central column 121. Each diversion groove 1214 extends along the axial direction of the central column 121.

[0110] In some embodiments, there are multiple water passing holes 1212, and the sum of the water passing areas of the multiple water passing holes 1212 is not less than 20 mm². For example, the sum of the water passing areas of the multiple water passing holes 1212 is 20 mm², 25 mm², 35 mm², 50 mm², etc. This design avoids a large flow resistance when water passes through the water passing holes 1212 and prevents the water passing holes 1212 from restricting the flow of water.

[0111] In some embodiments, to ensure the exhaust effect of the capacitive deionization filter element 1, the ratio of the axial distance between the water passing holes 1212 and the second end of the central column 121 to the length of the central column 121 is not greater than 15%.

[0112] In some embodiments, as Figure 2 , Figure 3 and Figure 4 shown, the capacitive deionization filter element 1 further includes: a housing 11 having a receiving cavity and a water inlet port 1101 and a water outlet port 1102 communicating with the receiving cavity; a filter element body 12 disposed in the receiving cavity, with a gap left between the peripheral wall of the filter element body 12 and the inner wall of the receiving cavity, and a fluid communication formed between the water inlet port 1101 and the gap, and a fluid communication formed between the water outlet channel 1211 and the water outlet port 1102.

[0113] Specifically, the water inlet port 1101 and the water outlet port 1102 are located on the same side of the housing 11; the filter element body 12 is disposed in the housing 11 and is configured to be coaxially arranged with the housing 11; a mutually isolated water outlet space 1111 and a receiving space 1112 are formed between the first end of the filter element body 12 and the inner wall of the housing 11, and the receiving space 1112 is located outside the water outlet space 1111; a gap is left between the outer side surface of the filter element body 12 and the inner wall of the housing 11;

[0114] wherein; the water inlet port 1101 communicates with the gap, and the water outlet 1213, the water outlet space 1111 and the water outlet port 1102 are sequentially communicated; the positive electrode tab 1201 and the negative electrode tab 1202 of the capacitive deionization filter element 1 both extend into the receiving space 1112, and the positive electrode tab 1201 and the negative electrode tab 1202 are spaced apart and adapted to be connected to an external power source.

[0115] It can be understood that the housing 11 is columnar, and the water inlet port 1101 and the water outlet port 1102 are respectively located at the first end of the housing 11 and communicate with the receiving cavity.

[0116] There is a mutually isolated water outlet space 1111 and accommodation space 1112 formed between the first end of the filter element body 12 and the inner wall of the first end of the housing 11, and the second end of the filter element body 12 abuts against the inner wall of the second end of the housing 11. Since the positive electrode tab 1201 and negative electrode tab 1202 of the capacitive deionization filter element 1 are provided in the accommodation space 1112, and the water outlet 1213 of the capacitive deionization filter element 1 is provided in the water outlet space 1111, this design realizes the electrical and water isolation of the capacitive deionization filter element 1 based on the mutually isolated water outlet space 1111 and accommodation space 1112, ensuring the reliability of the water purification work of the capacitive deionization filter element 1.

[0117] Among them, a power connection component 15 can be arranged in the accommodation space 1112. The power connection component 15 includes a positive terminal 151 and a negative terminal 152. At least part of the positive terminal 151 and at least part of the negative terminal 152 are exposed outside the housing 11. The positive terminal 151 is electrically connected to the positive electrode tab 1201 of the electrode assembly 122, and the negative terminal 152 is electrically connected to the negative electrode tab 1202 of the electrode assembly 122. This design facilitates the application of voltage to the positive electrode plate and negative electrode plate by an external power supply through the power connection component 15.

[0118] In some embodiments, such as Figure 3 and Figure 4 as shown, a first partition 1121 and a second partition 1122 are arranged on the inner wall of the housing 11. The second partition 1122 is located outside the first partition 1121. The first partition 1121 and the first end of the filter element body 12 enclose a water outlet space 1111, and the first partition 1121, the second partition 1122 and the first end of the filter element body 12 enclose an accommodation space 1112.

[0119] It can be understood that the first partition 1121 and the second partition 1122 are respectively arranged on the inner wall of the first end of the housing 11, the water outlet port 1102 is arranged at the center of the first end of the housing 11, and the first partition 1121 and the second partition 1122 respectively extend circumferentially around the water outlet port 1102 in a ring shape. Since the second partition 1122 is located outside the first partition 1121, the accommodation space 1112 is located outside the water outlet space 1111.

[0120] In practical applications, only by abutting the first end of the filter element body 12 against the inner wall of the first end of the housing 11, a water outlet space 1111 and an accommodation space 1112 can be formed between the first end of the filter element body 12 and the first end of the housing 11 based on the first partition 1121 and the second partition 1122.

[0121] In some embodiments, such as Figure 3 and Figure 9As shown, the capacitive deionization filter element 1 further includes: a first end cap 13; the first end cap 13 includes a first side wall 131 and a first cover body 132 that are bent and connected, the first side wall 131 is sealingly connected to the inner side surface of the second partition 1122, and the first cover body 132 is sealingly connected to the first end of the filter element body 12; wherein, the positive electrode tab 1201 and the negative electrode tab 1202 are located in the area enclosed by the first side wall 131 and the first partition 1121.

[0122] It can be understood that the first cover body 132 is in a disc shape, the first cover body 132 is provided with a central hole, the central hole is coaxially arranged with the water outlet port 1102, the first side wall 131 extends circumferentially relative to the central hole, and the positive electrode tab 1201, the negative electrode tab 1202 and the water outlet 1213 of the capacitive deionization filter element 1 penetrate through the central hole.

[0123] When the first end of the filter element body 12 abuts against the inner wall of the first end of the housing 11, the outer side surface of the first side wall 131 is sealingly connected to the inner side surface of the second partition 1122, and a closed accommodation space 1112 is formed between the first side wall 131, the first partition 1121 and the first end of the filter element body 12, and waterproof isolation of the positive electrode tab 1201 and the negative electrode tab 1202 can be achieved based on the accommodation space 1112.

[0124] At the same time, the peripheral wall of the water outlet 1213 (such as the peripheral wall of the first end of the central column 121) and the inner side surface of the first partition 1121 can also be configured to be sealingly connected. This design can ensure that the water body output from the water outlet 1213 directly discharges from the water outlet port 1102 after entering the water outlet space 1111, and the water body in the water outlet space 1111 will not flow into the accommodation space 1112.

[0125] In some embodiments, as Figure 3 and Figure 9 shown, the first end cap 13 further includes: a first glue blocking wall 133, the first glue blocking wall 133 is bent and connected to the first cover body 132, the first cover body 132 and the first end of the filter element body 12 are sealingly connected by a filling glue, the first glue blocking wall 133 is arranged on the outer side of the peripheral wall of the filter element body 12, for example, the inner side surface of the first glue blocking wall 133 is attached to the peripheral wall of the filter element body 12; of course, the inner side surface of the first glue blocking wall 133 and the peripheral wall of the filter element body 12 can also be arranged at intervals; wherein, there is a water passing gap between the outer side surface of the first glue blocking wall 133 and the inner wall of the housing 11, and the water inlet port 1101 is communicated with the gap through the water passing gap.

[0126] It can be understood that the filling glue can be epoxy resin glue, and the filling glue forms a sealing glue layer at the first end of the filter element body 12. The first glue blocking wall 133 is arranged on the outer edge of the first cover body 132 and extends circumferentially relative to the central hole, and the inner diameter of the first glue blocking wall 133 is adapted to the diameter of the filter element body 12.

[0127] A protrusion may be provided on the outer side of the first glue-blocking wall 133, and the protrusion abuts against the inner wall of the filter element body 12, so as to form a water passing gap between the outer side of the first glue-blocking wall 133 and the inner wall of the housing 11.

[0128] In practical applications, first, a layer of filling glue is provided in the first area at the first end of the filter element body 12, and the first area is disposed opposite to the first cover body 132 along the axial direction of the central column 121; then, the first end cover 13 is covered on the first end of the filter element body 12. Since the first glue-blocking wall 133 fits against the peripheral wall of the filter element body 12 and the first glue-blocking wall 133 extends circumferentially relative to the water outlet port 1102, the first glue-blocking wall 133 can not only prevent the filling glue from overflowing to the side of the capacitive deionization filter element 1, but also limit the filter element body 12 radially to ensure the coaxiality between the filter element body 12 and the water outlet port 1102. Then, a layer of filling glue is provided in the second area at the first end of the filter element body 12, and the second area corresponds to the area where the central hole is located on the first cover body 132, so as to complete the sealing of the first end of the filter element body 12.

[0129] Optionally, in order to ensure the sealing effect of the first end of the filter element body 12, a first support rib is provided on the side of the first cover body 132 facing the filter element body 12. The first support rib can be configured to extend radially along the central column 121. The first support rib is used to ensure the thickness of the filling glue filled at the first end of the filter element body 12 and is beneficial to ensuring the molding quality of the filling glue.

[0130] Optionally, in order to ensure the molding quality of the filling glue, a stop rib is further provided on the side of the first cover body 132 facing the capacitive deionization filter element 1. The stop rib is provided on the inner edge of the first cover body 132 and extends circumferentially relative to the central hole. The stop rib is used to limit the flow of the filling glue towards the area where the central hole is located.

[0131] In some embodiments, as Figure 3 and Figure 10 shown, the capacitive deionization filter element 1 further includes: a second end cover; the second end cover includes a second cover body 141 and a second glue-blocking wall 142 which are bent and connected. The second cover body 141 and the second end of the filter element body 12 are hermetically connected by filling glue. The second glue-blocking wall 142 is disposed outside the peripheral wall of the filter element body 12. For example, the inner side of the second glue-blocking wall 142 fits against the peripheral wall of the filter element body 12. Of course, the inner side of the second glue-blocking wall 142 and the peripheral wall of the filter element body 12 may also be spaced apart.

[0132] It can be understood that the second cover body 141 is in a disc shape, and the filling glue forms a sealing glue layer at the second end of the filter element body 12. The second cover body 141 fits against the surface of the sealing glue layer to achieve the sealing of the second end of the filter element body 12.

[0133] The second glue-blocking wall 142 is arranged along the outer edge of the second cover body 141 and extends circumferentially relative to the center of the second cover body 141. The inner diameter of the second glue-blocking wall 142 is adapted to the diameter of the filter element body 12. The second glue-blocking wall 142 is used to prevent the filling glue from overflowing to the peripheral wall of the filter element body 12.

[0134] Further, a first positioning portion is provided at the center of the second cover body 141, and the second glue-blocking wall 142 extends circumferentially relative to the first positioning portion.

[0135] A second positioning portion is provided at the center of the second end of the filter element body 12, and the first positioning portion and the second positioning portion are connected; the second glue-blocking wall 142 is sleeved on the peripheral wall of the filter element body 12. Among them, the first positioning portion includes a positioning protrusion, and the second positioning portion includes a positioning groove, and the positioning protrusion is inserted into the positioning groove.

[0136] A second support rib may also be provided on one side of the second cover body 141 facing the capacitive deionization filter element 1. The second support rib can be configured to extend radially along the central column 121. The second support rib is used to ensure the filling thickness of the filling glue at the second end of the filter element body 12 and is beneficial to ensuring the molding quality of the filling glue.

[0137] In some embodiments, as Figure 1 shown, the water purification system further includes: a post-filter 3, and the post-filter 3 is connected in series behind the last one of the plurality of capacitive deionization filter elements 1.

[0138] It can be understood that the post-filter 3 includes any one of a carbon rod filter element or a carbon fiber filter element. The post-filter 3 is used to filter and remove impurities from the water output by the plurality of capacitive deionization filter elements 1 again to ensure that the whole water purification system outputs clean purified water.

[0139] In some embodiments, as Figure 1 shown, the water purification system further includes: a flow meter 6, a flow regulating valve 7, and a control module; the flow meter 6 is connected in series on the output side of the post-filter 3 for collecting the water output flow of the post-filter 3; the flow regulating valve 7 is connected in series between the capacitive deionization filter element 1 and the post-filter 3; the control module is respectively connected to the flow meter 6 and the flow regulating valve 7, and the control module is used to control the opening degree of the flow regulating valve 7 according to the flow information fed back by the flow meter 6.

[0140] It can be understood that the control module can adjust the opening degree of the flow regulating valve 7 according to the flow information fed back by the flow meter 6 to ensure that the water purification system supplies purified water according to the set target flow.

[0141] In practical applications, the control module can also control the opening degree of the flow regulating valve 7 to be smaller when each capacitive deionization filter element 1 is in the regeneration state than when each capacitive deionization filter element 1 is in the water purification state, so as to control the waste water ratio of the water output of the water purification system.

[0142] Among them, the flow regulating valve 7 can adopt an electromagnetic proportional valve, and the waste water ratio is the water output flow of the water purification system when each capacitive deionization filter element 1 is in the regeneration state and the water output flow of the water purification system when each capacitive deionization filter element 1 is in the water purification state.

[0143] In some embodiments, as Figure 1 shown, the water purification system further includes: a first TDS sensor 100, a second TDS sensor 200 and a control module. The control module can be a single-chip microcomputer or a PLC controller; the first TDS sensor 100 is used to collect the TDS value of the raw water received by the pre-filter 2; the second TDS sensor 200 is used to collect the TDS value of the water body output by each capacitive deionization filter element 1;

[0144] The first TDS sensor 100 and the second TDS sensor 200 are respectively electrically connected to the control module, and the control module is respectively electrically connected to the controlled ends of each capacitive deionization filter element 1. The control module is used to control the working state of each capacitive deionization filter element 1 according to the TDS value fed back by the first TDS sensor 100 and / or the second TDS sensor 200.

[0145] It can be understood that TDS is the English initials abbreviation of Total Dissolved Solids. The TDS value refers to the concentration of total dissolved substances in the water body, with the unit of milligram per liter (mg / L), which mainly reflects the concentration of Ca 2+ 、Mg 2+ 、Na + 、K + and other ions in the water.

[0146] Optionally, when the first TDS sensor 100 detects that the TDS value of the raw water is greater than the first preset value, for example, the first preset value is set to 10 - 100 ppm, the control module can control one or more of the multiple capacitive deionization filter elements 1 to work in the water purification state to desalinate the water body output by the pre-filter 2.

[0147] Optionally, when each capacitive deionization filter element 1 operates in the regeneration state, the control module can determine whether each capacitive deionization filter element 1 has completed regeneration according to the difference between the TDS value detected by the first TDS sensor 100 and the TDS value of the water body output by each capacitive deionization filter element 1. For example, when the difference between the TDS value detected by the first TDS sensor 100 and the TDS value of the water body output by the capacitive deionization filter element 1 is zero, it can be determined that the capacitive deionization filter element 1 has completed regeneration. At this time, the control module can control the power supply to the capacitive deionization filter element 1 to be stopped, or control the capacitive deionization filter element 1 to operate in the water purification state.

[0148] In some embodiments, as Figure 1 shown, the water purification system further includes: a sterilization member 9, which is connected in series on the output side of the post-filter 3 and is used for sterilizing the purified water output by the post-filter 3.

[0149] It can be understood that the sterilization member 9 can be configured to be electrically connected to the control module. The sterilization member 9 can be an ultraviolet sterilization lamp to sterilize the purified water output by the post-filter 3 by means of ultraviolet irradiation; the sterilization member 9 can also include an ultraviolet lamp and a titanium dioxide photocatalytic layer, and active oxygen, such as hydroxyl radicals, can be generated by combining with titanium dioxide under the irradiation of ultraviolet light to achieve sterilization.

[0150] Finally, it should be noted that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that various combinations, modifications or equivalent replacements 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 all be covered by the scope of the claims of the present invention.

Claims

1. A water purification system, characterized in that, Comprising: A pre-filter (2) and a plurality of capacitive deionization filters (1), the capacitive deionization filter (1) having a water inlet port (1101) and a water outlet port (1102) for outputting purified water or wastewater, a plurality of the capacitive deionization filters (1) being connected in series in sequence, and the pre-filter (2) being connected in series on the front side of the first one of the plurality of capacitive deionization filters (1); A three-way valve (4), connected in series between two adjacent capacitive deionization filters (1) and communicating with the water outlet port (1102) of the last one of the plurality of capacitive deionization filters (1); A two-way valve (5), the pre-filter (2) being connected to the water inlet ports (1101) of each of the capacitive deionization filters (1) except the first one of the plurality of capacitive deionization filters (1) through the two-way valve (5); Wherein, when the capacitive deionization filter (1) is in the purified water state, the two-way valve (5) is cut off, and the three-way valve (4) is used to realize the connection between two adjacent capacitive deionization filters (1); When the capacitive deionization filter (1) is in the regeneration state, the two-way valve (5) is turned on, and the three-way valve (4) is used to realize the connection between the previous capacitive deionization filter (1) connected thereto and the water outlet port (1102) of the last one of the plurality of capacitive deionization filters (1).

2. The water purification system according to claim 1, wherein The capacitive deionization filter (1) includes a filter element body (12), and the filter element body (12) includes a central column (121) and an electrode assembly (122); The central column (121) has a water outlet channel (1211) and water passing holes (1212) communicating with the water outlet channel (1211), the water passing holes (1212) are arranged on the peripheral wall of the central column (121), the water outlet channel (1211) is arranged inside the central column (121) and forms a fluid connection with the water outlet port (1102); The electrode assembly (122) is wound around the peripheral wall of the central column (121), both ends of the electrode assembly (122) along the axial direction of the central column (121) are sealed, the outside of the electrode assembly (122) is used for receiving the input of raw water, and the inside of the electrode assembly (122) is used for outputting purified water or wastewater.

3. The water purification system according to claim 2, wherein, The electrode assembly (122) includes insulating sheets (11221) and at least two layers of electrode sheets (222), the insulating sheets (11221) and the electrode sheets (222) are arranged in a laminated manner, and the insulating sheets (11221) are sandwiched between two adjacent layers of the electrode sheets (222); the electrode sheets (222) include a current collector layer (12221) and an adsorption layer (12222), and the adsorption layers (12222) are arranged on both the front and back sides of the current collector layer (12221); two adjacent layers of the electrode sheets (222) are respectively configured as a positive electrode sheet and a negative electrode sheet, and a water passing channel (12201) for accommodating the insulating sheet (11221) is formed between the positive electrode sheet and the negative electrode sheet; The inner and outer ends of the electrode assembly (122) are correspondingly formed as a water outlet end and a water inlet end relative to the central column (121); the water inlet end is communicated with the water outlet end through the water passage (12201), and the water outlet end extends towards the peripheral wall of the central column (121) and forms a fluid communication with the water passage hole (1212).

4. The water purification system according to claim 2, wherein, A water outlet (1213) is provided at the first end of the central column (121), and the water outlet (1213) is communicated with the water outlet passage (1211); The water passage hole (1212) is provided on the peripheral wall near the second end of the central column (121), and a diversion groove (1214) is provided on the peripheral wall of the central column (121), and a fluid communication is formed between the diversion groove (1214) and the water passage hole (1212).

5. The water purification system according to claim 2, wherein, The capacitive deionization filter element (1) further includes: a housing (11), having an accommodation cavity and the water inlet port (1101) and the water outlet port (1102) communicated with the accommodation cavity; The filter element body (12) is arranged in the accommodation cavity, and a gap is left between the peripheral wall of the filter element body (12) and the inner wall of the accommodation cavity. A fluid communication is formed between the water inlet port (1101) and the gap, and a fluid communication is formed between the water outlet passage (1211) and the water outlet port (1102).

6. The water purification system according to any one of claims 1 to 5, characterized in that Further included is: A post-filter element (3), connected in series behind the last one of the plurality of capacitive deionization filter elements (1).

7. The water purification system according to claim 6, wherein Further included is: A flow meter (6), connected in series on the output side of the post-filter element (3) for collecting the water outlet flow of the post-filter element (3); A flow regulating valve (7), connected in series between the capacitive deionization filter element (1) and the post-filter element (3); A control module, respectively connected to the flow meter (6) and the flow regulating valve (7). The control module is used for controlling the opening degree of the flow regulating valve (7) according to the flow information fed back by the flow meter (6).

8. The water purification system according to claim 6, wherein Further included is: A first TDS sensor (100), used for collecting the TDS value of the raw water received by the pre-filter element (2); A second TDS sensor (200), used for collecting the TDS value of the water body output by each capacitive deionization filter element (1); A control module, respectively electrically connected to the first TDS sensor (100), the second TDS sensor (200) and the controlled ends of each capacitive deionization filter element (1). The control module is used for controlling the working state of each capacitive deionization filter element (1) according to the TDS value fed back by the first TDS sensor (100) and / or the second TDS sensor (200).

9. The water purification system according to claim 6, wherein The pre-filter element (2) includes any one of a PP cotton filter element, a carbon rod filter element or a carbon fiber filter element. Alternatively, the pre-filter element (2) includes multiple layers of filter elements, and the multiple layers of filter elements are sleeved together in sequence from the inside to the outside. Each layer of filter element includes any one of a PP cotton filter element, a carbon rod filter element or a carbon fiber filter element; The post-filter element (3) includes any one of a carbon rod filter element or a carbon fiber filter element.

10. The water purification system according to claim 6, characterized in that, Further included is: The sterilizing component (9) is connected in series to the output side of the post-filter element (3) and is used for sterilizing the purified water output by the post-filter element (3).

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