Water outlet control method and device of water purification equipment

Abstract

The present application relates to the technical field of water purification, and provides a water outlet control method and device for a water purification device. The water outlet control method for the water purification device comprises the following steps: obtaining a first TDS value of water received by a pre-filter element and an outlet flow rate of a post-filter element; determining an outlet flow rate of the water purification device according to the outlet flow rate and an outlet time of the post-filter element; determining that the first TDS value is greater than a first preset value, controlling a positive voltage to be applied to a capacitive deionization filter element, and controlling a reversing valve to be in a first state, so that purified water output by the capacitive deionization filter element flows to the post-filter element; determining that the outlet flow rate is greater than a preset water flow rate, controlling a reverse voltage to be applied to the capacitive deionization filter element, and controlling the reversing valve to be in a second state, so that waste water output by the capacitive deionization filter element flows to a waste water outlet. The method provided by the present application realizes optimization of a water channel structure of the water purification device, and can automatically realize switching of the water purification device between a purified water outlet mode and a waste water outlet mode.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, and in particular to a method and apparatus for controlling the output water of a water purification device. Background Technology

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

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

[0004] This invention aims to solve at least one of the technical problems existing in related technologies. To this end, this invention proposes a water outlet control method for a water purification device, which optimizes the water circuit structure of the water purification device and can automatically switch between purified water outlet mode and wastewater outlet mode.

[0005] The present invention also proposes a water outlet control device for a water purification equipment.

[0006] According to a first aspect of the present invention, a water purification device is used to control the water output of a water purification device, the water purification device comprising: a pre-filter, a capacitive deionization filter, a post-filter, and a reversing valve; the pre-filter and the capacitive deionization filter are sequentially connected in fluid communication, and the capacitive deionization filter is connected to the post-filter and the wastewater outlet of the water purification device respectively through the reversing valve; the method includes:

[0007] Obtain the first TDS value of the water received by the pre-filter and the outflow rate of the post-filter;

[0008] The water output of the water purification device is determined based on the water flow rate and the water output time of the post-filter.

[0009] If the first TDS value is determined to be greater than the first preset value, a positive voltage is applied to the capacitor deionization filter element, and the reversing valve is controlled to be in the first state, so that the purified water output by the capacitor deionization filter element flows to the post-filter element.

[0010] If the outflow rate is determined to be greater than the preset flow rate, a reverse voltage is applied to the capacitor deionization filter element, and the reversing valve is controlled to be in the second state, so that the wastewater output from the capacitor deionization filter element flows to the wastewater outlet.

[0011] According to an embodiment of the present invention, when the first TDS value exceeds the first preset value, the method further includes:

[0012] Obtain the second TDS value of the water output from the post-filter cartridge;

[0013] Once the second TDS value is determined to be no lower than the second preset value, the reversing valve is controlled to be in the second state so that the water output from the capacitor deionization filter flows to the wastewater outlet.

[0014] If the second TDS value is determined to be lower than the second preset value, the reversing valve is controlled to be in the first state so that the water output from the capacitor deionization filter cartridge flows to the post-filter cartridge;

[0015] The second TDS value is less than the first TDS value.

[0016] According to an embodiment of the present invention, the method further includes: determining the water purification capacity of the capacitive deionization filter element using the following formula: S=1-(K1 / K2).

[0017] Wherein, S is the water purification capacity, K1 is the second TDS value, and K2 is the first TDS value.

[0018] According to one embodiment of the present invention, the water purification device further includes: a flow regulating valve, the flow regulating valve being disposed between the capacitive deionization filter element and the reversing valve; after the capacitive deionization filter element receives a positive voltage, the method further includes:

[0019] The opening of the flow regulating valve is controlled based on the difference between the outflow rate and the set flow rate, so that the outflow rate is equal to 90% to 110% of the set flow rate.

[0020] According to an embodiment of the present invention, the method further includes: obtaining the purified water flow rate and wastewater flow rate output by the capacitor deionization filter cartridge;

[0021] The opening of the flow regulating valve is controlled according to a wastewater ratio of 1:(1~10), where the wastewater ratio is the ratio of the wastewater flow rate to the clean water flow rate.

[0022] According to one embodiment of the present invention, the water purification device further includes a switching valve for controlling the water supply system to supply water to the pre-filter cartridge; after the capacitive deionization filter cartridge receives a reverse voltage, the method further includes:

[0023] Obtain the third TDS value of the wastewater outlet water body;

[0024] If the difference between the third TDS value and the first TDS value is less than a third preset value, the switching valve is controlled to close, the capacitor deionization filter element is controlled to stop operating, and the reversing valve is controlled to switch from the second state to the first state.

[0025] According to one embodiment of the present invention, the water purification device further includes: a sterilization element and a water inlet, the sterilization element being disposed on a pipeline between the post-filter cartridge and the water inlet; after the capacitive deionization filter cartridge receives a positive voltage, the method further includes:

[0026] The sterilization unit is activated to sterilize the water output from the post-filter.

[0027] According to one embodiment of the present invention, the capacitive deionization filter element includes a water outlet pipe, a guide pipe, and an electrode assembly. The electrode assembly is wound around the peripheral wall of the water outlet pipe, and both ends of the electrode assembly along the axial direction of the water outlet pipe 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.

[0028] The water outlet pipe has a first water passage hole on its peripheral wall, a water outlet is formed at the first end of the water outlet pipe, and the second end of the water outlet pipe is closed; the guide pipe passes through the water outlet pipe to form a water passage gap between the guide pipe and the water outlet pipe; the peripheral wall of the first end of the guide pipe is sealed to the inner wall of the water outlet pipe, and a second water passage hole is formed between the second end of the guide pipe and the second end of the water outlet pipe;

[0029] The first water passage hole, the water passage gap, the second water passage hole, the inner cavity of the guide pipe, and the water outlet are sequentially connected in a fluid communication.

[0030] According to one embodiment of the present invention, the electrode assembly includes: an insulating sheet and at least two electrode sheets, wherein the insulating sheet and the electrode sheets are stacked, and the insulating sheet is sandwiched between two adjacent electrode sheets; each electrode sheet includes a current collector layer and an adsorption layer, wherein the adsorption layer is provided on both the front and back sides of the current collector layer; each adjacent electrode sheet is respectively configured as a positive electrode sheet and a negative electrode sheet, and a water passage for accommodating the insulating sheet is formed between the positive electrode sheet and the negative electrode sheet;

[0031] The electrode assembly is formed as an outlet end and an inlet end relative to the inner and outer ends of the outlet pipe; the inlet end is connected to the outlet end through the water passage, and the outlet end extends toward the peripheral wall of the outlet pipe and forms fluid communication with the first water passage hole.

[0032] According to one embodiment of the present invention, two adjacent electrode sheets are arranged opposite each other along the stacking direction, and the insulating sheet and the electrode sheets are staggered along the stacking direction so that the electrode sheets are hidden between two adjacent insulating sheets.

[0033] According to one embodiment of the present invention, the peripheral wall of the water outlet pipe is provided with a plurality of sets of first water passage holes along the circumferential direction, and each set of first water passage holes is arranged along the axial direction of the water outlet pipe.

[0034] The number of electrode sheets is greater than two layers, so that the electrode assembly forms multiple water passages; the inner end of the electrode assembly forms multiple water outlets corresponding to the multiple water passages, and the multiple water outlets are arranged opposite to multiple sets of the first water passage holes.

[0035] According to a second aspect embodiment of the present invention, the water purification equipment includes a water outlet control device comprising: a pre-filter, a capacitor deionization filter, a post-filter, and a reversing valve; the pre-filter and the capacitor deionization filter are sequentially connected in fluid communication, and the capacitor deionization filter is connected to the post-filter and the wastewater outlet of the water purification equipment respectively through the reversing valve; the device includes:

[0036] The acquisition module is used to acquire the first TDS value of the water received by the pre-filter and the outflow rate of the post-filter;

[0037] The determining module is used to determine the water output of the water purification device based on the water flow rate and the water output time of the post-filter cartridge;

[0038] The first control module is used to determine that the first TDS value is greater than the first preset value, control the application of a positive voltage to the capacitor deionization filter element, and control the reversing valve to be in a first state so that the purified water output by the capacitor deionization filter element flows to the post-filter element.

[0039] The second control module is used to determine that the outflow volume is greater than the preset volume, control the application of reverse voltage to the capacitor deionization filter element, and control the reversing valve to be in the second state so that the wastewater output by the capacitor deionization filter element flows to the wastewater outlet.

[0040] An electronic device according to a third aspect of the present invention includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the water output control method of the water purification device as described above.

[0041] According to a fourth aspect of the present invention, a non-transitory computer-readable storage medium is provided thereon storing a computer program that, when executed by a processor, implements the water outlet control method of the water purification device as described above.

[0042] According to a fifth aspect of the present invention, a computer program product includes a computer program that, when executed by a processor, implements the water outlet control method of the water purification device as described above.

[0043] The above-described one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects:

[0044] The water output control method of this invention organically combines a pre-filter, a capacitive deionization filter, and a post-filter through a reversing valve. When the first TDS value of the water received by the pre-filter is greater than a first preset value, a positive voltage is applied to the capacitive deionization filter, and the reversing valve is controlled to be in a first state. This ensures that after the pre-filter filters the raw water, the capacitive deionization filter desalinates the water output from the pre-filter, and the post-filter filters the purified water output from the capacitive deionization filter again, thus realizing water output from the water purification component in purified water output mode. Furthermore, when the water output of the post-filter is greater than a preset water volume, a reverse voltage is applied to the capacitive deionization filter, and the reversing valve is controlled to be in a second state. This ensures that after the pre-filter filters the raw water, the ions adsorbed by the capacitive deionization filter in the desalination state are automatically released and discharged from the wastewater outlet along with the received water, thus realizing water output from the water purification component in wastewater output mode.

[0045] As can be seen from the above, the water output control method shown in this invention integrates the pre-filter, the capacitor deionization filter, and the post-filter into one unit, thereby optimizing the water circuit structure and enabling convenient switching between purified water output mode and wastewater output mode.

[0046] 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

[0047] 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.

[0048] Figure 1 This is a schematic diagram of the water circuit structure of the water purification equipment provided in an embodiment of the present invention;

[0049] Figure 2 This is a schematic flowchart of the water outlet control method for the water purification equipment provided in this embodiment of the invention;

[0050] Figure 3 This is a schematic diagram of the water purification assembly formed by the pre-filter, the capacitor deionization filter, and the post-filter provided in an embodiment of the present invention.

[0051] Figure 4 This is provided by the embodiments of the present invention. Figure 3 One of the cross-sectional schematic diagrams of the water purification components shown;

[0052] Figure 5 This is provided by the embodiments of the present invention. Figure 3 The second cross-sectional view of the water purification components shown;

[0053] Figure 6 This is provided by the embodiments of the present invention. Figure 3 The diagram shown is a structural schematic of the water purification component without its housing.

[0054] Figure 7 This is a schematic diagram of the structure of the capacitor deionization filter element provided in the embodiment of the present invention;

[0055] Figure 8 This is a schematic diagram of the assembly of the water outlet pipe and the guide pipe provided in an embodiment of the present invention;

[0056] Figure 9 This is a cross-sectional schematic diagram of the assembly of the water outlet pipe and the guide pipe provided in an embodiment of the present invention;

[0057] Figure 10 This is provided by the embodiments of the present invention. Figure 9 A magnified view of a portion of the central K section;

[0058] Figure 11 This is a schematic diagram of the structure of the electrode assembly provided in an embodiment of the present invention wound around the peripheral wall of the water outlet pipe;

[0059] Figure 12 This is a schematic diagram of the end cap structure provided in an embodiment of the present invention;

[0060] Figure 13 This is a cross-sectional schematic diagram of the electrode assembly stacking configuration provided in an embodiment of the present invention;

[0061] Figure 14 This is a cross-sectional schematic diagram of the electrode sheet provided in an embodiment of the present invention;

[0062] Figure 15 This is a schematic diagram of the water outlet control device of the water purification equipment provided in the embodiment of the present invention;

[0063] Figure 16 This is a schematic diagram of the structure of the electronic device provided in an embodiment of the present invention;

[0064] Figure label:

[0065] 1. Shell; 101. Inlet port; 102. Outlet port; 111. Outlet space; 112. Accommodation space; 121. Partition;

[0066] 2. Capacitor deionization filter element; 21. Water outlet pipe; 22. Electrode assembly; 23. Guide pipe; 211. First water passage hole; 212. Water outlet; 201. Water passage gap; 202. Second water passage hole; 230. Sealing component; 2301. Sealing plate; 2302. Protrusion; 221. Insulating sheet; 222. Electrode sheet; 2201. Water passage channel; 2221. Current collector layer; 2222. Adsorption layer; 2001. Positive electrode tab; 2002. Negative electrode tab;

[0067] 3. First end cap; 31. First side wall; 32. First cover body; 33. First adhesive barrier wall;

[0068] 4. Second end cap; 41. Second cover body; 42. Second adhesive barrier wall; 43. Second side wall;

[0069] 5. Power connection assembly; 51. Positive terminal; 52. Negative terminal;

[0070] 10. Switch valve; 20. Pre-filter element; 30. Flow regulating valve; 40. Reversing valve; 50. Post-filter element; 501. Housing; 502. Filter element body; 5001. Outlet channel; 60. Flow meter; 70. Sterilization component; 100. First TDS sensor; 200. Second TDS sensor; 300. Third TDS sensor. Detailed Implementation

[0071] 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.

[0072] 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.

[0073] 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.

[0074] 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.

[0075] 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.

[0076] The following is combined Figures 1-16 The water output control method and device of the water purification equipment provided in this invention will be described in detail through specific embodiments and application scenarios.

[0077] In the first aspect, such as Figure 1 , Figure 3 and Figure 4 As shown, this embodiment of the invention provides a water purification device, which includes: a pre-filter 20, a capacitor deionization filter 2, a post-filter 50, and a reversing valve 40; the pre-filter 20 and the capacitor deionization filter 2 are in fluid communication in sequence, and the capacitor deionization filter 2 is connected to the post-filter 50 and the wastewater outlet of the water purification device through the reversing valve 40.

[0078] The reversing valve 40 has a first state and a second state. When the reversing valve 40 is in the first state, it controls the flow of purified water output from the capacitor deionization filter 2 to the post-filter 50, which is connected to the purified water outlet of the water purification equipment. When the reversing valve 40 is in the second state, it controls the flow of wastewater output from the capacitor deionization filter 2 to the wastewater outlet of the water purification equipment.

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

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

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

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

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

[0084] Furthermore, the pre-filter 20, the capacitive deionization filter 2, and the post-filter 50 are installed inside the housing 1 to form a water purification assembly; the housing 1 has a receiving cavity and an inlet port 101, an outlet port 102, and a wastewater outlet communicating with the receiving cavity; the pre-filter 20, the capacitive deionization filter 2, and the post-filter 50 are respectively disposed in the receiving cavity; the inlet port 101, the pre-filter 20, and the capacitive deionization filter 2 are sequentially connected in fluid communication, and the post-filter 50 and the outlet port 102 are connected in fluid communication.

[0085] As can be seen from the above, by setting a pre-filter 20, a capacitor deionization filter 2 and a post-filter 50 in the housing 1, and configuring a receiving cavity and an inlet port 101, an outlet port 102 and a wastewater outlet connected to the receiving cavity, this design integrates the pre-filter 20, the capacitor deionization filter 2 and the post-filter 50 into one unit based on the housing 1, which occupies less space and simplifies the water circuit structure of existing water purification components.

[0086] Furthermore, such as Figure 2 As shown, this embodiment of the invention also provides a water outlet control method for a water purification device as described above. The execution subject of this method can be a server or a controller of the water purification device. The method includes the following steps:

[0087] Step S21: Obtain the first TDS value of the water received by the pre-filter 20 and the outflow rate of the post-filter 50;

[0088] Understandably, such as Figure 1 As shown, by setting a first TDS sensor 100 on the water inlet side of the pre-filter 20, the first TDS value of the water received by the pre-filter 20 can be collected by the first TDS sensor 100; by setting a flow meter 60 on the water outlet side of the post-filter 50, the water flow rate of the post-filter 50 can be collected by the flow meter 60.

[0089] Step S22: Determine the water output of the water purification equipment based on the water flow rate and the water output time of the post-filter 50.

[0090] Understandably, since the water output is the integral of flow rate over time, and considering that the water flow rate of the water purifier may change in real time, and based on the user's drinking habits, the user may take water multiple times within the same time period (e.g., a week or a month), the water purifier will start running each time water is taken. Thus, each time the water purifier starts running, the water flow rate of the water purifier is integrated with the water output time to obtain the water output of the water purifier each time it starts running. Then, the water output of the water purifier each time it starts running is added together to obtain the current water output of the water purifier.

[0091] Step S23: Determine that the first TDS value is greater than the first preset value, control the application of a positive voltage to the capacitor deionization filter 2, and control the reversing valve 40 to be in the first state so that the purified water output by the capacitor deionization filter 2 flows to the post-filter 50.

[0092] Understandably, the first preset value can be 10-100ppm. When the first TDS value is greater than the first preset value, it can be considered that the water received by the pre-filter 20 has a high hardness and needs to be deionized.

[0093] TDS is an abbreviation for Total Dissolved Solids. The TDS value refers to the concentration of total dissolved substances in water, measured in milligrams per liter (mg / L). It primarily reflects the concentration of calcium in the water. 2+ Mg 2+ Na + K + Plasma concentration.

[0094] When a positive voltage is applied to the capacitive deionization filter element 2, the capacitive deionization filter element 2 operates in a desalination state, and the capacitive deionization filter element 2 desalinates the water received from the pre-filter element 20. When the reversing valve 40 is in the first state, a fluid connection is formed between the capacitive deionization filter element 2 and the post-filter element 50, and the post-filter element 50 is used to filter the desalinated water output from the capacitive deionization filter element 2 again.

[0095] Step S24: Determine that the outflow rate is greater than the preset flow rate, control the application of reverse voltage to the capacitor deionization filter 2, and control the reversing valve 40 to be in the second state so that the wastewater output from the capacitor deionization filter 2 flows to the wastewater outlet.

[0096] Understandably, when the outflow is greater than the preset flow, it can be assumed that a large number of anions, cations or other charged particles are adsorbed on the electrode assembly 22 of the capacitor deion filter 2. The capacitor deion filter 2 can no longer adsorb charged particles or ions in the newly input water or the adsorption effect on these charged particles or ions is small. The desalination capacity of the capacitor deion filter 2 drops significantly. At this time, it is necessary to control the capacitor deion filter 2 to work in the regeneration state.

[0097] When a reverse voltage is applied to the capacitor deionization filter element 2, the capacitor deionization filter element 2 operates in the regeneration state. The ions adsorbed by the capacitor deionization filter element 2 in the desalination state are automatically removed under the action of the reverse electric field. When the reversing valve 40 is in the second state, a fluid connection is formed between the capacitor deionization filter element 2 and the wastewater outlet, and the wastewater output by the capacitor deionization filter element 2 is directly discharged from the wastewater outlet.

[0098] The water output control method of this invention organically combines a pre-filter 20, a capacitive deionizer 2, and a post-filter 50 via a reversing valve 40. When the first TDS value of the water received by the pre-filter 20 exceeds a first preset value, a positive voltage is applied to the capacitive deionizer 2, and the reversing valve 40 is controlled to be in a first state. This ensures that after the pre-filter 20 filters the raw water, the capacitive deionizer 2 desalinates the water output from the pre-filter 20, and the post-filter 50 further desalinates the water. The purified water output from the deionized filter cartridge 2 is filtered to achieve water output from the water purification component in purified water output mode. When the water output of the post-filter cartridge 50 is greater than the preset water output, a reverse voltage is applied to the deionized filter cartridge 2, and the reversing valve 40 is controlled to be in the second state. This ensures that after the pre-filter cartridge 20 filters the raw water, the ions adsorbed by the deionized filter cartridge 2 in the desalination state are automatically removed and discharged from the wastewater outlet along with the received water, thus achieving water output from the water purification component in wastewater output mode.

[0099] As can be seen from the above, the water output control method shown in this invention integrates the pre-filter 20, the capacitor deionization filter 2, and the post-filter 50 into one unit, thereby optimizing the water circuit structure and enabling convenient switching between purified water output mode and wastewater output mode.

[0100] In some embodiments, such as Figure 4 and Figure 5 As shown, the pre-filter 20 is sleeved on the outside of the capacitor deion filter 2, and the capacitor deion filter 2 and the post-filter 50 are coaxially arranged; the post-filter 50 includes a shell 501 and a filter body 502, the filter body 502 is disposed inside the shell 501, a water passage space is formed between the filter body 502 and the shell 501, and a water outlet channel 5001 is provided inside the filter body 502;

[0101] The first port of the reversing valve 40 is connected to the water outlet of the capacitor deion filter 2, the second port of the reversing valve 40 is connected to the water passage space, the third port of the reversing valve 40 is connected to one end of the water outlet channel 5001, and the other end of the water outlet channel 5001 is connected to the water outlet port 102.

[0102] When the reversing valve 40 is in the first state, the first port and the second port of the reversing valve 40 are connected; when the reversing valve 40 is in the second state, the first port and the third port of the reversing valve 40 are connected, and the outlet port 102 is used as a wastewater outlet.

[0103] It is understandable that the pre-filter 20 is cylindrical and the capacitive deionization filter 2 is cylindrical. When the pre-filter 20 is sleeved on the outside of the capacitive deionization filter 2, the pre-filter 20 and the capacitive deionization filter 2 can be configured to be coaxial or non-coaxial, and there is no specific limitation on this.

[0104] When the pre-filter 20, the capacitor deionization filter 2, and the post-filter 50 are arranged inside the housing 1, the pre-filter 20 is sleeved on the outside of the capacitor deionization filter 2 to form a composite filter. The first end of the composite filter abuts against the inner wall of the first end of the housing 1, the second end of the composite filter abuts against the first end of the post-filter 50, and the second end of the post-filter 50 abuts against the inner wall of the second end of the housing 1.

[0105] The composite filter element is designed with sealed ends along the axial direction. The outlet end of the capacitor deion filter element 2 extends from the second end of the composite filter element and is connected to the post-filter element 50 through the reversing valve 40.

[0106] Meanwhile, for the post-filter element 50, the filter element body 502 is provided with a water outlet channel 5001 extending along the axial direction of the capacitive deion filter element 2, and both ends of the filter element body 502 along its axial direction are sealed; thus, when the reversing valve 40 is in the first state, the purified water output by the capacitive deion filter element 2 enters the water passage space after passing through the reversing valve 40, and then enters the filter element body 502 from the peripheral wall on the side of the filter element body 502. After filtering the received water, the filter element body 502 outputs purified water from the water outlet channel 5001 and discharges it from the water outlet port 102; when the reversing valve 40 is in the second state, the wastewater output by the capacitive deion filter element 2 enters the water outlet channel 5001 of the filter element body 502 through the reversing valve 40 and is directly discharged from the water outlet port 102.

[0107] In some embodiments, when the first TDS value exceeds a first preset value, the effluent control method of the present invention further includes:

[0108] Obtain the second TDS value of the water output from the post-filter cartridge 50;

[0109] Once the second TDS value is determined to be no lower than the second preset value, the reversing valve 40 is controlled to be in the second state so that the water output from the capacitor deionization filter 2 flows to the wastewater outlet.

[0110] Once the second TDS value is determined to be lower than the second preset value, the reversing valve 40 is controlled to be in the first state so that the water output from the capacitor deionization filter 2 flows to the post-filter 50.

[0111] The second TDS value is less than the first TDS value.

[0112] Understandably, such as Figure 1 As shown, the water purification equipment is equipped with a second TDS sensor 200, which is located between the reversing valve 40 and the post-filter cartridge 50. The second TDS sensor 200 is used to detect the second TDS value of the water output from the post-filter cartridge 50. The first TDS sensor 100 and the second TDS sensor 200 are electrically connected to the control module, and the control module is electrically connected to the capacitor deionization cell.

[0113] When the TDS value fed back by the first TDS sensor 100 is greater than the first preset value, for example, the first preset value is 10-100 ppm, the control module controls the capacitive deion filter 2 to work in the water purification state. When the TDS value fed back by the second TDS sensor 200 is less than the second preset value, the control module controls the reversing valve 40 to be in the first state, so that the purified water output by the capacitive deion filter 2 flows to the post-filter 50, and the post-filter 50 filters the purified water output by the capacitive deion filter 2 again. When the TDS value fed back by the second TDS sensor 200 is greater than or equal to the second preset value, the control module controls the reversing valve 40 to be in the second state, so that the water output by the capacitive deion filter 2 flows to the wastewater outlet. Thus, only when the TDS value of the water output by the capacitive deion filter 2 meets the requirements will the water output by the capacitive deion filter 2 be controlled by the reversing valve 40 to flow to the post-filter 50.

[0114] In some embodiments, the water output control method of the present invention further includes: determining the water purification capacity of the capacitor deionization filter element 2 using the following formula: S=1-(K1 / K2).

[0115] Where S represents the water purification capacity, K1 represents the second TDS value of the water output by the post-filter cartridge 50, and K2 represents the first TDS value of the water received by the pre-filter cartridge 20.

[0116] In some embodiments, such as Figure 1 As shown, the water purification equipment also includes: a flow regulating valve 30, which is located between the capacitor deionization filter element 2 and the reversing valve 40; after the capacitor deionization filter element 2 receives a positive voltage, the water outlet control method shown in this embodiment further includes:

[0117] Based on the difference between the outflow rate and the set flow rate, the opening of the flow regulating valve 30 is controlled so that the outflow rate is equal to 90% to 110% of the set flow rate.

[0118] Understandably, in practical applications, the difference between the outlet flow rate and the set flow rate can be set as close to zero as possible. If the outlet flow rate is detected to be greater than or less than the set flow rate, the opening of the flow regulating valve 30 can be reduced or increased accordingly to ensure that the water purification equipment outputs water at the set flow rate within an error range of ±10%.

[0119] In some embodiments, the water effluent control method of the present invention further includes:

[0120] Obtain the purified water flow rate and wastewater flow rate output by capacitor deionization filter cartridge 2;

[0121] The opening of the flow regulating valve 30 is controlled according to the wastewater ratio of 1:(1~10), where the wastewater ratio is the ratio of wastewater flow rate to clean water flow rate.

[0122] Understandably, when the water purifier operates in the purified water output mode, the purified water flow rate output by the capacitor deionization filter 2 is obtained; when the water purifier operates in the wastewater output mode again, the wastewater flow rate output by the capacitor deionization filter 2 is obtained. At this time, the opening of the flow regulating valve 30 is adjusted according to the wastewater ratio of 1: (1~10). This design can ensure the advantage of the wastewater ratio of the water purifier.

[0123] In some embodiments, such as Figure 1 As shown, the water purification equipment also includes a switching valve 10, which is used to control the water supply system to supply water to the pre-filter 20; after the capacitive deion filter 2 receives a reverse voltage, the water outlet control method shown in this invention further includes:

[0124] Obtain the third TDS value of the wastewater outlet water body;

[0125] If the difference between the third TDS value and the first TDS value is less than the third preset value, control the switch valve 10 to close, control the capacitor deionization filter element 2 to stop operating, and control the reversing valve 40 to switch from the second state to the first state.

[0126] Understandably, the water purification equipment also includes a third TDS sensor 300, which is located between the reversing valve 40 and the wastewater outlet. The third TDS sensor 300 is used to detect the third TDS value of the wastewater output from the capacitive deionization filter 2. The first TDS sensor 100 and the third TDS sensor 300 are electrically connected to the control module, and the control module is electrically connected to the capacitive deionization filter.

[0127] When the capacitive deionization filter element 2 receives a reverse voltage, it enters the regeneration state and discharges wastewater. The control module can determine whether the capacitive deionization filter element 2 has completed regeneration based on the difference between the TDS values ​​fed back by the first TDS sensor 100 and the third TDS sensor 300. For example, when the difference is zero, it can be determined that the capacitive deionization filter element 2 has completed regeneration. At this time, the control module can control the power supply to the capacitive deionization filter element 2 to stop, or control the reversing valve 40 to switch from the second state to the first state, and control the capacitive deionization filter element 2 to operate in the purified water state.

[0128] In some embodiments, such as Figure 1 As shown, the water purification equipment also includes: a sterilization element 70 and a water inlet, wherein the sterilization element 70 is disposed on the pipeline between the post-filter cartridge 50 and the water inlet; after the capacitive deionization filter cartridge 2 receives a positive voltage, the method further includes:

[0129] The sterilization component 70 is activated to sterilize the water output from the post-filter 50.

[0130] Understandably, the sterilization component 70 can be configured to be electrically connected to the control module. The sterilization component 70 can be an ultraviolet germicidal lamp to sterilize the purified water output from the post-filter 50 by ultraviolet irradiation; the sterilization component 70 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.

[0131] In some embodiments, such as Figure 4 and Figure 5 As shown, the capacitive deionization filter element 2 includes an outlet pipe 21, a guide pipe 23, and an electrode assembly 22. The electrode assembly 22 is wound around the peripheral wall of the outlet pipe 21. The two ends of the electrode assembly 22 along the axial direction of the outlet pipe 21 are sealed. The outer side of the electrode assembly 22 is used to receive the input of raw water, and the inner side of the electrode assembly 22 is used to output purified water or wastewater.

[0132] The peripheral wall of the water outlet pipe 21 is provided with a first water passage hole 211, the first end of the water outlet pipe 21 forms a water outlet 212, and the second end of the water outlet pipe 21 is closed; the guide pipe 23 is inserted into the water outlet pipe 21 to form a water passage gap 201 between the guide pipe 23 and the water outlet pipe 21; the peripheral wall of the first end of the guide pipe 23 is sealed to the inner wall of the water outlet pipe 21, and a second water passage hole 202 is formed between the second end of the guide pipe 23 and the second end of the water outlet pipe 21;

[0133] The first water passage 211, the water passage gap 201, the second water passage 202, the inner cavity of the guide pipe 23 and the water outlet 212 are sequentially connected to form a fluid connection.

[0134] Understandably, electrode assembly 22 typically includes stacked positive and negative electrodes, which are isolated from each other, and a flow channel for water supply is formed between the positive and negative electrodes.

[0135] like Figure 11 As 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 21, and then the electrode assembly 22 is wound layer by layer with the water outlet pipe 21 as the central axis until the electrode assembly 22 is wound into a columnar distribution.

[0136] Since the electrode assembly 22 is wound around the peripheral wall of the outlet pipe 21 and both ends of the electrode assembly 22 are sealed along the axial direction of the outlet pipe 21, when a positive voltage is applied to the positive and negative electrodes, cations, anions, or charged particles in the water will migrate to the surface of the positive and negative electrodes under the action of the electric field force, so that the inner side of the electrode assembly 22 outputs desalinated water; when a reverse voltage is applied to the positive and negative electrodes, or when the voltage is stopped, the anions, cations, or charged particles adsorbed on the surface of the positive and negative electrodes will automatically detach, so that the inner side of the electrode assembly 22 outputs wastewater with a higher concentration.

[0137] Considering that the peripheral wall of the existing water outlet pipe 21 is usually densely covered with multiple water passage holes, the water output from the inner side of the electrode assembly 22 will evenly pass through each water passage hole into the water outlet channel. If air bubbles appear in the electrode assembly 22, the air bubbles may adhere to the surface of the positive electrode and / or negative electrode. The flowing water will not have an effect on the desorption of the air bubbles. However, this application, by inserting a guide pipe 23 inside the outlet pipe 21 and setting a second water passage hole 202 between the second end of the guide pipe 23 and the second end of the outlet pipe 21, makes the second water passage hole 202 located away from the outlet 212. This design can limit the water output from the inner side of the electrode assembly 22 to gradually converge towards the area where the second water passage hole 202 is located after entering the water passage gap 201 from the first water passage hole 211, and then enter the guide pipe 23 through the second water passage hole 202. Finally, under the guidance of the guide pipe 23, it is output from the outlet 212. During the water flow, because the second water passage hole 202 is located away from the outlet 212, the flowing water gradually converges towards the area where the second water passage hole 202 is located. This will gradually squeeze the air bubbles generated in the electrode assembly 22 to the area where the second water passage hole 202 is located, and then discharge them with the water under the guidance of the guide pipe 23, thereby effectively removing the air bubbles that appear in the capacitor deion filter 2.

[0138] As can be seen from the above, during the desalination process of the capacitor deion filter 2, the air bubbles generated inside the filter can be effectively discharged, which can prevent the capacitor deion filter 2 from generating noise during operation, ensure the stability of the internal electric field of the electrode assembly 22, and thus also ensure the water purification effect of the capacitor deion filter 2.

[0139] It should be noted that the capacitive deionization filter element 2 also includes a protective sleeve, such as a cylindrical membrane. The protective sleeve is fitted onto the peripheral wall of the electrode assembly 22. The protective sleeve has multiple water inlets to ensure that water can reach the outside of the electrode assembly 22 through the water inlets, and then the electrode assembly 22 will desalinate the received water.

[0140] In some embodiments, such as Figure 8 and Figure 9 As shown, a sealing element 230 is provided inside the water outlet pipe 21, and the sealing element 230 is located near the second end of the water outlet pipe 21; the peripheral wall of the first end of the guide pipe 23 is sealed to the inner wall of the first end of the water outlet pipe 21, and a second water passage hole 202 is formed between the second end of the guide pipe 23 and the sealing element 230.

[0141] Understandably, the axial distance between the sealing element 230 and the second end of the outlet pipe 21 is less than the axial distance between the sealing element 230 and the first end of the outlet pipe 21.

[0142] The length of the guide pipe 23 can be configured such that the axial length between the sealing member 230 and the first end of the outlet pipe 21 is equal. A sealing ring can be used to achieve a sealing connection between the peripheral wall of the first end of the guide pipe 23 and the inner wall of the first end of the outlet pipe 21. The second end of the guide pipe 23 can be configured to abut against the sealing member 230; however, a gap is reserved between the second end of the guide pipe 23 and the sealing member 230 to form the aforementioned second water passage 202.

[0143] Furthermore, such as Figure 9 and Figure 10 As shown, the sealing component 230 includes: a sealing plate 2301 and a plurality of protrusions 2302; the sealing plate 2301 is connected to the inner wall of the water outlet pipe 21, for example, the periphery of the sealing plate 2301 is connected to the inner wall of the water outlet pipe 21; the plurality of protrusions 2302 are provided on the side of the sealing plate 2301 facing the water outlet 212, the plurality of protrusions 2302 are spaced apart circumferentially, the second end of the guide pipe 23 abuts against at least a portion of the plurality of protrusions 2302, and a second water passage hole 202 is formed between two adjacent protrusions 2302.

[0144] Understandably, since multiple protrusions 2302 are spaced apart circumferentially, multiple second water passage holes 202 are provided. The multiple second water passage holes 202 are limited to being arranged circumferentially, and each second water passage hole 202 can realize fluid communication between the water passage gap 201 and the inner cavity of the guide pipe 23.

[0145] In some embodiments, in order to ensure the venting effect of the capacitive deion filter 2, the axial distance between the sealing member 230 and the second end of the water outlet pipe 21 is set to be no more than 15% of the length of the water outlet pipe 21.

[0146] It is understandable that, since a second water passage hole 202 is formed between the second end of the guide pipe 23 and the sealing member 230, the axial length between the second water passage hole 202 and the outlet 212 accounts for no more than 15% of the length of the outlet pipe 21.

[0147] Optionally, the length of the capacitor deion filter element 2 is approximately 333-350mm, and the axial distance between the sealing component 230 and the second end of the outlet pipe 21 can be set to be less than 50mm, so that the second water passage 202 is as far away from the outlet 212 of the capacitor deion filter element 2 as possible, thereby ensuring the air venting effect.

[0148] In some embodiments, multiple second water passage holes 202 are provided, and the sum of the water passage areas of the multiple second water passage holes 202 is not less than 20 mm². For example, the sum of the water passage areas of the multiple second water passage holes 202 is 20 mm², 25 mm², 35 mm², and 50 mm², etc. This design avoids large flow resistance when water passes through the second water passage holes 202 and prevents the second water passage holes 202 from restricting the flow of water.

[0149] In some embodiments, such as Figure 4 , Figure 13 and Figure 14 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, and the insulating sheet 221 is sandwiched between two adjacent electrode sheets 222; the electrode sheet 222 includes a current collector layer 2221 and an adsorption layer 2222, and the current collector layer 2221 is provided with 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;

[0150] The electrode assembly 22 is formed as an outlet end and an inlet end relative to the inner and outer ends of the outlet pipe 21. The inlet end is connected to the outlet end through the water passage 2201, and the outlet end extends to the peripheral wall of the outlet pipe 21 and forms a fluid communication with the first water passage hole 211.

[0151] 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.

[0152] For electrode 222, the current collector layer 2221 of electrode 222 can be made of metal or graphite material so that the current collector layer 2221 forms a conductive layer, and the adsorption layer 2222 of electrode 222 can be made of activated carbon and other adsorption materials to achieve adsorption of ions in raw water.

[0153] 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.

[0154] 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.

[0155] 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.

[0156] In some embodiments, heavy metals include, but are not limited to, Pb, As, Fe, Cr, and Cu.

[0157] 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.

[0158] In some embodiments, the particle size of titanium dioxide is 0.25 mm to 1.5 mm, the surface area of ​​titanium dioxide is 200 m² / g to 240 m² / g, and the average pore size of titanium dioxide is 6 nm to 9 nm. For example, the particle size of titanium dioxide is 0.25 mm, 0.5 mm, 0.7 mm, 0.9 mm, 1.3 mm, 1.5 mm, etc., the surface area of ​​titanium dioxide is 200 m² / g, 210 m² / g, 220 m² / g, 230 m² / g, 240 m² / g, etc., and the average pore size of titanium dioxide is 6 nm, 7 nm, 8 nm, 9 nm, etc. The inventors have found that controlling the particle size, surface area, and average pore size of titanium dioxide within the above range can provide better active functional groups, have better ion complexing ability, thereby improving the removal rate of heavy metals, and better synergistic effect with activated carbon, retaining a certain amount of beneficial ions needed by the human body while removing heavy metals.

[0159] 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.

[0160] 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.

[0161] 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.

[0162] 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.

[0163] 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.

[0164] 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.

[0165] 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.

[0166] 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.

[0167] In practical applications, the operation of the capacitive deionization filter element 2 includes an adsorption purification process and a desorption regeneration process. When the two adjacent electrode plates 222 are electrically connected to the positive and negative poles of the power supply and the power supply is turned on, the anions and cations in the raw water are attracted to the electrode plates 222 with opposite charges and adsorbed by the adsorption layer 2222 on the electrode plates 222. This working process of the capacitive deionization filter element 2 is the adsorption purification process.

[0168] Correspondingly, when a reverse voltage is applied to two adjacent electrode layers 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.

[0169] As can be seen from the above, the capacitive deion filter element 2 shown in this embodiment achieves the integrated design of the electrode sheet 222 by setting the adsorption layer 2222 on the front and back sides of the current collector layer 2221. The electrode assembly 22 can be formed by simply stacking the electrode sheet 222 and the insulating sheet 221 in an alternating arrangement. This stacked arrangement design of the electrode assembly 22 simplifies the arrangement structure of the electrode assembly 22, facilitates processing and production, and helps to reduce production costs.

[0170] Meanwhile, in practical applications, simply connecting two adjacent electrode layers 222 to the positive and negative poles of the power supply allows for the adsorption of ions in the raw water passing through the water passage 2201, achieving the purpose of purifying the raw water. Since both sides of the current collector layer 2221 of each electrode layer 222 are equipped with adsorption layers 2222, both sides of each electrode layer 222 can adsorb ions, thus ensuring the purification effect of the raw water to a certain extent. The capacitive deionization filter 2 can effectively remove heavy metal ions from the water while retaining beneficial ions needed by the human body, meeting the needs of household water purification.

[0171] In some embodiments, such as Figure 13 As shown, in order to ensure the purification effect on the raw water, the two adjacent electrode plates 222 are arranged opposite each other along the stacking direction to ensure the coverage of the electric field between the two adjacent electrode plates 222 as much as possible, and then remove anions, cations and other charged particles in the raw water based on the electric field between the two adjacent electrode plates 222.

[0172] Furthermore, by staggering the insulating sheet 221 and the electrode sheet 222 along the stacking direction, the electrode sheet 222 is hidden between two adjacent insulating sheets 221. This design ensures electrical isolation between two adjacent electrode sheets 222, and also facilitates positioning the water outlet end of the electrode assembly 22 opposite to the first water passage hole 211 on the peripheral wall of the water outlet pipe 21, ensuring that the water passage channel 2201 inside the electrode assembly 22 and the water passage gap 201 inside the water outlet pipe 21 remain unobstructed.

[0173] Among them, such as Figure 13 As shown, the stacking direction is along the thickness direction of the insulating sheet 221 or the electrode sheet 222.

[0174] In some embodiments, such as Figure 8 , Figure 9 and Figure 11 As shown, the peripheral wall of the water outlet pipe 21 is provided with multiple sets of first water passage holes 211 along the circumferential direction, and each set of first water passage holes 211 is arranged along the axial direction of the water outlet pipe 21.

[0175] The number of electrode sheets 222 is greater than two layers, so that the electrode assembly 22 forms multiple water passages 2201; the inner end of the electrode assembly 22 forms multiple water outlets corresponding to the multiple water passages 2201, and the multiple water outlets are arranged opposite to multiple sets of first water passage holes 211.

[0176] Understandably, by setting the number of electrode plates 222 to be greater than two layers, multiple water passages 2201 formed by the electrode assembly 22 can be used to purify the raw water flowing through multiple channels in the capacitor deion filter 2 at the same time, thereby improving the purification efficiency of the raw water.

[0177] At the same time, by setting multiple water outlets and multiple sets of first water passage holes 211 opposite to each other, the smoothness of the water passage between each water passage 2201 and the water passage gap 201 inside the water outlet pipe 21 can be ensured, which in turn helps to ensure the clean water output flow of the capacitor deion filter element 2.

[0178] In practical applications, while ensuring electrical isolation between two adjacent electrode sheets 222, the insulating sheet 221 and the end of the electrode sheet 222 near the end of the electrode assembly 22 close to the water outlet pipe 21 can be staggered in sequence and arranged circumferentially along the extension direction of the electrode sheet 222.

[0179] In some embodiments, such as Figure 5 , Figure 7 and Figure 11 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.

[0180] 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, 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.

[0181] 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.

[0182] 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.

[0183] 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.

[0184] 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.

[0185] 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.

[0186] 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.

[0187] 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.

[0188] In some embodiments, such as Figure 4 , Figure 5 and Figure 6As shown, the composite filter element includes a capacitor deionization filter element 2 and a pre-filter element 20 coaxially sleeved on the outside of the capacitor deionization filter element 2; the first end of the composite filter element abuts against the inner wall of the first end of the housing 1, the second end of the composite filter element abuts against the first end of the post-filter element 50, and the second end of the post-filter element 50 abuts against the inner wall of the second end of the housing 1.

[0189] Since the capacitive deionization filter element 2 must rely on power supply to operate, in order to achieve water-electricity isolation design, a receiving space 112 is formed between the first end of the capacitive deionization filter element 2 and the inner wall of the first end of the housing 1, and a water outlet space 111 is formed between the second end of the post-filter element 50 and the inner wall of the first end of the housing 1. The receiving space 112 and the water outlet space 111 are arranged opposite to each other and isolated from each other. The water inlet port 101 and the water outlet port 102 on the housing 1 are located at the second end of the housing 1 and are connected to the receiving cavity inside the housing 1.

[0190] The post-filter 50 has a first gap between its peripheral wall and the inner wall of the housing 1, and the pre-filter 20 has a second gap between its peripheral wall and the inner wall of the housing 1. The inlet port 101, the first gap, the second gap and the pre-filter 20 are connected in a fluid manner. The outlet channel 5001, the outlet space 111 and the outlet port 102 of the post-filter 50 are connected in a fluid manner.

[0191] In some embodiments, such as Figure 5 As shown, the capacitor deionization filter element 2 also includes: an electrical connection component 5 disposed in the accommodating space 112, including a positive terminal 51 and a negative terminal 52, which are used to connect to an external power source.

[0192] The capacitive deionization filter element 2 has a positive electrode tab 2001 and a negative electrode tab 2002 at the end opposite to the post-filter element 50. The positive terminal 51 is connected to the positive electrode plate through the positive electrode tab 2001, and the negative terminal 52 is connected to the negative electrode plate through the negative electrode tab 2002. This design facilitates the application of voltage to the positive and negative electrodes by an external power source through the power connection component 5.

[0193] In some embodiments, such as Figure 4 , Figure 6 and Figure 12 As shown, the water purification equipment also includes: a first end cap 3; the first end cap 3 includes a first side wall 31 and a first cover body 32 that are bent and connected. The first side wall 31 abuts against the inner wall of the first end of the housing 1, and the first cover body 32 is sealed to the first end of the composite filter element. The first cover body 32, the first side wall 31 and the inner wall of the first end of the housing 1 enclose and form an accommodating space 112.

[0194] The electrode assembly 22 also includes a positive electrode tab 2001 connected to the positive electrode plate and a negative electrode tab 2002 connected to the negative electrode plate. The first cover 32 is provided with a first through hole for the positive electrode tab 2001 to pass through and a second through hole for the negative electrode tab 2002 to pass through.

[0195] Understandably, the first cover 32 is disc-shaped, and the first sidewall 31 extends circumferentially relative to the central axis of the capacitor deionization filter element 2. The first sidewall 31 is located on the side of the first cover 32 away from the capacitor deionization filter element 2 and abuts against the inner wall of the first end of the housing 1, so that the first cover 32, the first sidewall 31 and the inner wall of the housing 1 enclose and form an accommodating space 112.

[0196] In some embodiments, such as Figure 4 and Figure 12 As shown, the first end cap 3 further includes a first baffle wall 33 that is bent and connected to the first cover body 32. The outer side of the first baffle wall 33 is sealed to the inner wall of the housing 1. The first cover body 32 and the first end of the composite filter element are sealed together by a filler adhesive. The first baffle wall 33 is located on the outer side of the peripheral wall of the pre-filter element 20. For example, the inner side of the first baffle wall 33 is attached to the peripheral wall of the pre-filter element 20. Of course, the inner side of the first baffle wall 33 and the peripheral wall of the pre-filter element 20 can also be spaced apart.

[0197] Understandably, the filler adhesive forms a sealant layer at the first end of the composite filter element, and the first cover 32 adheres to the surface of the sealant layer to achieve a seal at the first end of the composite filter element.

[0198] The first adhesive barrier 33 is located on the outer edge of the first cover 32 and extends circumferentially relative to the center of the first cover 32. The inner diameter of the first adhesive barrier 33 is adapted to the diameter of the pre-filter element 20. The first adhesive barrier 33 is used to prevent the filling adhesive from overflowing to the peripheral wall of the pre-filter element 20.

[0199] A first support rib may be provided on one side of the first cover 32 facing the composite filter element. The first support rib may be configured to extend radially along the capacitor deionization filter element 2. The first support rib is used to ensure the thickness of the filling adhesive at the first end of the composite filter element and to help ensure the molding quality of the filling adhesive.

[0200] By sealing the outer side of the first baffle wall 33 with the inner wall of the shell 1, water can be prevented from entering the accommodating space 112 formed between the first cover 32, the first side wall 31 and the inner wall of the shell 1.

[0201] In some embodiments, such as Figure 3 and Figure 4 As shown, a partition 121 is provided on the inner wall of the second end of the housing 1, and the partition 121 and the second end of the post-filter 50 enclose a water outlet space 111.

[0202] Understandably, the baffle 121 extends circumferentially relative to the water outlet 102, and the peripheral wall of the water outlet end of the post-filter 50 is sealed to the inner side of the baffle 121, so that the baffle 121 and the second end of the post-filter 50 enclose and form a water outlet space 111.

[0203] In some embodiments, such as Figure 3 and Figure 4 As shown, the water purification equipment also includes: a second end cover 4, which includes a second cover body 41 and a second baffle wall 42 that are bent and connected. The second cover body 41 is sandwiched between the second end of the composite filter element and the first end of the post-filter element 50. The second cover body 41 is provided with a through hole, which is used to realize the connection between the outlet 212 of the central column and the first port of the reversing valve 40.

[0204] The second cover 41 is sealed to the second end of the composite filter element by a filler adhesive. The second baffle wall 42 is located on the outer side of the peripheral wall of the pre-filter element 20. For example, the inner side of the second baffle wall 42 is attached to the peripheral wall of the pre-filter element 20. Of course, the inner side of the second baffle wall 42 and the peripheral wall of the pre-filter element 20 can also be provided at intervals.

[0205] A third gap is left between the outer side of the second baffle wall 42 and the inner wall of the housing 1. The water inlet port 101, the first gap, the third gap, the second gap and the pre-filter 20 are connected in sequence to form a fluid connection.

[0206] Understandably, the filler adhesive forms a sealing layer at the second end of the composite filter element. The second sealing wall 42 is located on the outer edge of the second cover 41 and extends circumferentially relative to the central column. The inner diameter of the second sealing wall 42 is adapted to the diameter of the pre-filter element 20.

[0207] Furthermore, such as Figure 3 and Figure 4 As shown, the second end cap 4 also includes a second side wall 43, which is disposed on the side of the second cover 41 facing the rear filter element 50 and extends circumferentially relative to the central column; the second side wall 43 is used to fit onto the peripheral wall of the rear filter element 50 to install and position the rear filter element 50.

[0208] A fourth gap is left between the outer side of the second sidewall 43 and the inner wall of the housing 1, and the water inlet port 101, the first gap, the fourth gap, the third gap, the second gap and the pre-filter 20 are connected in sequence to form a fluid connection.

[0209] Furthermore, in order to ensure the sealing effect of the second end of the composite filter element, the second cover 41 is provided with a second support rib on one side facing the composite filter element. The second support rib can be configured to extend radially along one side of the composite filter element. The second support rib is used to ensure the thickness of the filling adhesive at the second end of one side of the composite filter element and to help ensure the molding quality of the filling adhesive.

[0210] In the second aspect, such as Figure 1 and Figure 15 As shown, this embodiment of the invention also provides a water outlet control device for a water purification system. The water purification system includes: a pre-filter, a capacitor deionization filter, a post-filter, and a reversing valve; the pre-filter and the capacitor deionization filter are sequentially connected in fluid communication, and the capacitor deionization filter is connected to the post-filter and the wastewater outlet of the water purification system respectively through the reversing valve; the device includes the following modules:

[0211] The acquisition module 151 is used to acquire the first TDS value of the water received by the pre-filter and the outflow rate of the post-filter.

[0212] The determining module 152 is used to determine the water output of the water purification equipment based on the water flow rate and the water output time of the post-filter cartridge.

[0213] The first control module 153 is used to determine that the first TDS value is greater than the first preset value, control the application of a positive voltage to the capacitor deionization filter element, and control the reversing valve to be in the first state so that the purified water output by the capacitor deionization filter element flows to the post-filter element.

[0214] The second control module 154 is used to determine that the outflow is greater than the preset flow, control the application of reverse voltage to the capacitor deionization filter element, and control the reversing valve to be in the second state so that the wastewater output from the capacitor deionization filter element flows to the wastewater outlet.

[0215] Understandably, the water output control device shown in this invention organically combines the pre-filter, the capacitor deionization filter, and the post-filter through a reversing valve. When the first TDS value of the water received by the pre-filter is greater than a first preset value, a positive voltage is applied to the capacitor deionization filter, and the reversing valve is controlled to be in a first state. This ensures that after the pre-filter filters the raw water, the capacitor deionization filter desalinates the water output from the pre-filter, and the post-filter filters the purified water output from the capacitor deionization filter again, thus realizing water output from the water purification component in purified water output mode. Furthermore, when the water output of the post-filter is greater than a preset water volume, a reverse voltage is applied to the capacitor deionization filter, and the reversing valve is controlled to be in a second state. This ensures that after the pre-filter filters the raw water, the ions adsorbed by the capacitor deionization filter in the desalination state are automatically released and discharged from the wastewater outlet along with the received water, thus realizing water output from the water purification component in wastewater output mode.

[0216] As can be seen from the above, the water outlet control device shown in this invention integrates the pre-filter, the capacitor deionization filter, and the post-filter into one unit, thereby optimizing the water circuit structure and enabling convenient switching between purified water outlet mode and wastewater outlet mode.

[0217] Figure 16 An example is a schematic diagram of the physical structure of an electronic device, such as... Figure 16 As shown, the electronic device may include: a processor 161, a communication interface 162, a memory 163, and a communication bus 164, wherein the processor 161, the communication interface 162, and the memory 163 communicate with each other through the communication bus 164. The processor 161 can call logic instructions in the memory 163 to execute the water output control method of the water purification device as described below. The method includes: acquiring a first TDS value of the water received by the pre-filter and the water output flow rate of the post-filter; determining the water output volume of the water purification device based on the water output flow rate and the water output time of the post-filter; determining that the first TDS value is greater than a first preset value, controlling the application of a positive voltage to the capacitive deionization filter and controlling the reversing valve to a first state so that the purified water output by the capacitive deionization filter flows to the post-filter; determining that the water output volume is greater than a preset water volume, controlling the application of a reverse voltage to the capacitive deionization filter and controlling the reversing valve to a second state so that the wastewater output by the capacitive deionization filter flows to the wastewater outlet.

[0218] Furthermore, the logical instructions in the aforementioned memory 163 can be implemented as software functional units and, when sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, essentially, or the part that contributes to related technologies, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0219] On the other hand, this invention discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium. The computer program includes program instructions, and when the program instructions are executed by a computer, the computer can execute the water output control method of the water purification device provided in the above-described method embodiments. The method includes: acquiring a first TDS value of the water received by the pre-filter and the water output flow rate of the post-filter; determining the water output of the water purification device based on the water output flow rate and the water output time of the post-filter; determining that the first TDS value is greater than a first preset value, controlling the application of a positive voltage to the capacitive deionization filter and controlling the reversing valve to a first state so that the purified water output by the capacitive deionization filter flows to the post-filter; determining that the water output is greater than a preset water volume, controlling the application of a reverse voltage to the capacitive deionization filter and controlling the reversing valve to a second state so that the wastewater output by the capacitive deionization filter flows to the wastewater outlet.

[0220] In another aspect, embodiments of the present invention also provide a non-transitory computer-readable storage medium storing a computer program thereon. When executed by a processor, the computer program implements a water outlet control method for the water purification device provided in the above embodiments. The method includes: acquiring a first TDS value of the water received by the pre-filter and the water flow rate of the post-filter; determining the water output of the water purification device based on the water flow rate and the water output time of the post-filter; determining that the first TDS value is greater than a first preset value, controlling the application of a positive voltage to the capacitive deionization filter and controlling the reversing valve to a first state so that the purified water output by the capacitive deionization filter flows to the post-filter; determining that the water output is greater than a preset water volume, controlling the application of a reverse voltage to the capacitive deionization filter and controlling the reversing valve to a second state so that the wastewater output by the capacitive deionization filter flows to the wastewater outlet.

[0221] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Those skilled in the art can understand and implement this without any creative effort.

[0222] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus necessary general-purpose hardware platforms, and of course, it can also be implemented by hardware. Based on this understanding, the above technical solutions, in essence or the parts that contribute to the related technology, can be embodied in the form of software products. This computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, magnetic disk, optical disk, etc., and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute the methods described in the various embodiments or some parts of the embodiments.

[0223] 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 method for controlling the water output of a water purification device, characterized in that, The water purification equipment includes: a pre-filter (20), a capacitor deionization filter (2), a post-filter (50), and a reversing valve (40); the pre-filter (20) and the capacitor deionization filter (2) are connected in fluid order, and the capacitor deionization filter (2) is connected to the post-filter (50) and the wastewater outlet of the water purification equipment through the reversing valve (40); the capacitor deionization filter (2) includes an outlet pipe (21), a guide pipe (23), and an electrode assembly (22), the electrode assembly (22) is wound around the peripheral wall of the outlet pipe (21), the electrode assembly (22) is sealed at both ends along the axial direction of the outlet pipe (21), 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 outlet pipe (21) has a first water passage hole (211) on its peripheral wall, and the first end of the water outlet pipe (21) forms a water outlet (212), and the second end of the water outlet pipe (21) is closed; the guide pipe (23) is inserted into the water outlet pipe (21) to form a water passage gap (201) between the guide pipe (23) and the water outlet pipe (21); the peripheral wall of the first end of the guide pipe (23) is sealed to the inner wall of the water outlet pipe (21), and a second water passage hole (202) is formed between the second end of the guide pipe (23) and the second end of the water outlet pipe (21); wherein, the first water passage hole (211), the water passage gap (201), the second water passage hole (202), the inner cavity of the guide pipe (23) and the water outlet (212) are sequentially connected in fluid communication; the method includes: Obtain the first TDS value of the water received by the pre-filter (20) and the outflow rate of the post-filter (50); The water output of the water purification device is determined based on the water flow rate and the water output time of the post-filter (50); If the first TDS value is determined to be greater than the first preset value, a positive voltage is applied to the capacitor deionization filter (2), and the reversing valve (40) is controlled to be in the first state so that the purified water output by the capacitor deionization filter (2) flows to the post-filter (50). If the outflow rate is determined to be greater than the preset flow rate, a reverse voltage is applied to the capacitor deionization filter element (2), and the reversing valve (40) is controlled to be in the second state so that the wastewater output by the capacitor deionization filter element (2) flows to the wastewater outlet.

2. The water outlet control method of the water purification equipment according to claim 1, characterized in that, When the first TDS value exceeds the first preset value, the method further includes: Obtain the second TDS value of the water output from the post-filter cartridge (50); If the second TDS value is determined to be not lower than the second preset value, the reversing valve (40) is controlled to be in the second state so that the water output from the capacitor deion filter (2) flows to the wastewater outlet; If the second TDS value is determined to be lower than the second preset value, the reversing valve (40) is controlled to be in the first state so that the water output from the capacitor deionization filter (2) flows to the post-filter (50). The second TDS value is less than the first TDS value.

3. The water outlet control method for the water purification equipment according to claim 2, characterized in that, The method further includes determining the water purification capacity of the capacitive deionization filter element (2) using the following formula: S = 1 - (K1 / K2); Wherein, S is the water purification capacity, K1 is the second TDS value, and K2 is the first TDS value.

4. The water outlet control method of the water purification equipment according to claim 1, characterized in that, The water purification equipment further includes: a flow regulating valve (30), the flow regulating valve (30) being disposed between the capacitor deionization filter element (2) and the reversing valve (40); after the capacitor deionization filter element (2) receives a positive voltage, the method further includes: Based on the difference between the outflow rate and the set flow rate, the opening of the flow regulating valve (30) is controlled so that the outflow rate is equal to 90% to 110% of the set flow rate.

5. The water outlet control method of the water purification equipment according to claim 4, characterized in that, The method further includes: obtaining the clean water flow rate and wastewater flow rate output by the capacitor deionization filter (2); The opening of the flow regulating valve (30) is controlled according to a wastewater ratio of 1:(1~10), where the wastewater ratio is the ratio of the wastewater flow rate to the clean water flow rate.

6. The water outlet control method of the water purification equipment according to claim 1, characterized in that, The water purification equipment also includes a switch valve (10), which is used to control the water supply system to supply water to the pre-filter (20); after the capacitor deion filter (2) receives a reverse voltage, the method further includes: obtaining the third TDS value of the wastewater outlet water body; If the difference between the third TDS value and the first TDS value is less than a third preset value, control the switching valve (10) to close, control the capacitor deionization filter (2) to stop running, and control the reversing valve (40) to switch from the second state to the first state.

7. The water outlet control method of the water purification equipment according to claim 1, characterized in that, The water purification equipment further includes: a sterilization element (70) and a water inlet, wherein the sterilization element (70) is disposed on the pipeline between the post-filter cartridge (50) and the water inlet; after the capacitor deionization filter cartridge (2) receives a positive voltage, the method further includes: The sterilization component (70) is started and operated to sterilize the water output from the post-filter (50).

8. The water outlet control method of the water purification equipment 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), wherein the insulating sheet (221) and the electrode sheets (222) are stacked, and the insulating sheet (221) is sandwiched between two adjacent layers of electrode sheets (222); The electrode sheet (222) includes a current collector layer (2221) and an adsorption layer (2222). The adsorption layer (2222) is provided on both the front and back sides of the current collector layer (2221). Two adjacent electrode sheets (222) are respectively configured as a positive electrode sheet and a negative electrode sheet, and a water passage (2201) for accommodating the insulating sheet (221) is formed between the positive electrode sheet and the negative electrode sheet. The electrode assembly (22) is formed as an outlet end and an inlet end relative to the inner and outer ends of the outlet pipe (21); the inlet end is connected to the outlet end through the water passage (2201), and the outlet end extends toward the peripheral wall of the outlet pipe (21) and forms a fluid connection with the first water passage hole (211).

9. The water outlet control method of the water purification equipment according to claim 8, characterized in that, The two adjacent electrode sheets (222) are arranged opposite each other along the stacking direction, and the insulating sheet (221) and the electrode sheet (222) are staggered along the stacking direction so that the electrode sheet (222) is hidden between the two adjacent insulating sheets (221).

10. The water outlet control method of the water purification equipment according to claim 8, characterized in that, The peripheral wall of the water outlet pipe (21) is provided with multiple sets of first water passage holes (211) along the circumferential direction, and each set of first water passage holes (211) is arranged along the axial direction of the water outlet pipe (21). The number of electrode sheets (222) is greater than two layers, so that the electrode assembly (22) forms multiple water passages (2201); the inner end of the electrode assembly (22) forms multiple water outlets corresponding to the multiple water passages (2201), and the multiple water outlets are arranged opposite to multiple sets of the first water passage holes (211).

11. A water outlet control device for a water purification system, characterized in that, The water purification equipment includes: a pre-filter (20), a capacitor deionization filter (2), a post-filter (50), and a reversing valve (40); the pre-filter (20) and the capacitor deionization filter (2) are connected in fluid order, and the capacitor deionization filter (2) is connected to the post-filter (50) and the wastewater outlet of the water purification equipment through the reversing valve (40); the capacitor deionization filter (2) includes an outlet pipe (21), a guide pipe (23), and an electrode assembly (22), the electrode assembly (22) is wound around the peripheral wall of the outlet pipe (21), the electrode assembly (22) is sealed at both ends along the axial direction of the outlet pipe (21), 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 outlet pipe (21) has a first water passage hole (211) on its peripheral wall, and the first end of the water outlet pipe (21) forms a water outlet (212), and the second end of the water outlet pipe (21) is closed; the guide pipe (23) passes through the water outlet pipe (21) to form a water passage gap (201) between the guide pipe (23) and the water outlet pipe (21); the peripheral wall of the first end of the guide pipe (23) is sealed to the inner wall of the water outlet pipe (21), and a second water passage hole (202) is formed between the second end of the guide pipe (23) and the second end of the water outlet pipe (21); wherein, the first water passage hole (211), the water passage gap (201), the second water passage hole (202), the inner cavity of the guide pipe (23) and the water outlet (212) are sequentially connected in fluid communication; the device includes: The acquisition module (151) is used to acquire the first TDS value of the water body received by the pre-filter (20) and the outflow rate of the post-filter (50); The determining module (152) is used to determine the water output of the water purification device based on the water flow rate and the water output time of the post-filter (50); The first control module (153) is used to determine that the first TDS value is greater than the first preset value, control the application of a positive voltage to the capacitor deionization filter (2), and control the reversing valve (40) to be in the first state so that the purified water output by the capacitor deionization filter (2) flows to the post-filter (50). The second control module (154) is used to determine that the outflow volume is greater than the preset volume, control the application of reverse voltage to the capacitor deionization filter (2), and control the reversing valve (40) to be in the second state so that the wastewater output by the capacitor deionization filter (2) flows to the wastewater outlet.

12. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the computer program, it implements the water outlet control method of the water purification device as described in any one of claims 1 to 10.

13. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the water outlet control method of the water purification device as described in any one of claims 1 to 10.

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