Water outlet control method and device of water purification equipment

Abstract

The invention relates to the technical field of water purification, and provides a water outlet control method and device of water purification equipment. The water outlet control method of the water purification equipment comprises the following steps: acquiring a first TDS value of a water body received by a front filter element and the water outlet flow of a rear filter element; according to the water outlet flow and the water outlet time of the rear filter element, the water outlet amount of the water purification equipment is determined; determining that the first TDS value is greater than a first preset value, controlling to apply forward voltage to the capacitive deionization filter element, and controlling the reversing valve to be in a first state, so that purified water output by the capacitive deionization filter element flows to a rear filter element; and determining that the water yield is greater than the preset water yield, controlling to apply reverse voltage to the capacitive deionization filter element, and controlling the reversing valve to be in a second state, so that the wastewater output by the capacitive deionization filter element flows to the wastewater outlet. According to the method disclosed by the invention, the water path structure of the water purification equipment is optimized, and the water purification equipment can be automatically switched between a purified water outlet mode and a waste water outlet mode.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and in particular to a water outlet control method and device for water purification equipment. Background Art

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

[0003] In the related art, capacitive deionization filter elements are usually combined with other filter elements used for physical filtration to ensure water purification effect. However, since each filter element is used independently, the water purification component formed by this combination not only has complex water channels and occupies a large site space, but also cannot easily switch between different water outlet modes. Summary of the invention

[0004] The present invention aims to solve at least one of the technical problems existing in the related art. To this end, the present invention proposes a water outlet control method of a water purification device, which optimizes the water channel structure of the water purification device and can automatically switch the water purification device between a clean water outlet mode and a waste water outlet mode.

[0005] The invention also provides a water outlet control device for the water purification equipment.

[0006] According to a water outlet control method of a water purification device according to an embodiment of the first aspect of the present invention, the water purification device comprises: a pre-filter element, a capacitor deionizing filter element, a post-filter element and a reversing valve; the pre-filter element and the capacitor deionizing filter element are fluidically connected in sequence, and the capacitor deionizing filter element is respectively connected to the post-filter element and the wastewater outlet of the water purification device through the reversing valve; the method comprises: Obtaining a first TDS value of the water body received by the pre-filter and an outlet water flow rate of the post-filter; Determining the water output of the water purification device according to the water output flow rate and the water output time of the post-filter element; Determining that the first TDS value is greater than a first preset value, controlling the application of a forward voltage to the capacitor deionization filter element, and controlling the reversing valve to be in a first state, so that the clean water output by the capacitor deionization filter element flows to the post-filter element; Determine that the water output is greater than a preset water volume, control the application of a reverse voltage to the capacitor deionization filter element, and control the reversing valve to be in a second state, so that the wastewater output by the capacitor deionization filter element flows to the wastewater outlet.

[0007] According to an embodiment of the present invention, when the first TDS value exceeds the first preset value, the method further includes: Obtain a second TDS value of the water output by the post-filter; Determine that the second TDS value is not lower than a second preset value, and control the reversing valve to be in a second state so that the water output by the capacitive deionization filter element flows to the wastewater outlet; Determining that the second TDS value is lower than a second preset value, controlling the reversing valve to be in a first state so that the water output by the capacitive deionization filter element flows to the post-filter element; Wherein, the second TDS value is smaller than the first TDS value.

[0008] According to one embodiment of the present invention, the method further comprises: determining the water purification capacity of the capacitive deionization filter element using the following formula: S=1-(K1 / K2); Among them, S is the water purification capacity, K1 is the second TDS value, and K2 is the first TDS value.

[0009] According to one embodiment of the present invention, the water purification device further includes: a flow regulating valve, the flow regulating valve being arranged between the capacitor deionizing filter element and the reversing valve; after the capacitor deionizing filter element receives a forward voltage, the method further includes: According to the difference between the water outlet flow rate and the set flow rate, the opening of the flow regulating valve is controlled so that the water outlet flow rate is equal to 90% to 110% of the set flow rate.

[0010] According to one embodiment of the present invention, the method further comprises: obtaining the clean water flow rate and the waste water flow rate output by the capacitive deionization filter element; The opening of the flow regulating valve is controlled according to a wastewater ratio of 1: (1-10), wherein the wastewater ratio is the ratio of the wastewater flow to the clean water flow.

[0011] According to one embodiment of the present invention, the water purification device further includes a switch valve, and the switch valve is used to control the water supply system to supply water to the pre-filter element; after the capacitive deionization filter element receives the reverse voltage, the method further includes: Obtaining a third TDS value of the water body output from the wastewater outlet; Determine that the difference between the third TDS value and the first TDS value is less than a third preset value, control the switch valve to close, control the capacitor deionization filter to stop running, and control the reversing valve to switch from the second state to the first state.

[0012] According to one embodiment of the present invention, the water purification device further includes: a sterilizing element and a water supply port, wherein the sterilizing element is disposed on a pipeline between the post-filter element and the water supply port; after the capacitor deionizing filter element receives a forward voltage, the method further includes: The sterilization element is controlled to start operation so as to sterilize the water outputted by the post-filter element.

[0013] According to one embodiment of the present invention, the capacitive deionization filter element comprises a water outlet pipe, a flow guide pipe and an electrode assembly, wherein the electrode assembly is wound around the peripheral wall of the water outlet pipe, and the electrode assembly is sealed at both ends along the axial direction of the water outlet pipe, and 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 clean water or waste water; The peripheral wall of the water outlet pipe is provided with a first water hole, the first end of the water outlet pipe forms a water outlet, and the second end of the water outlet pipe is closed; the guide pipe is inserted into the water outlet pipe to form a water gap between the guide pipe and the water outlet pipe; the peripheral wall of the first end of the guide pipe is sealedly connected to the inner wall of the water outlet pipe, and a second water hole is formed between the second end of the guide pipe and the second end of the water outlet pipe; The first water passage hole, the water passage gap, the second water passage hole, the inner cavity of the flow guide pipe and the water outlet are fluidically connected in sequence.

[0014] According to one embodiment of the present invention, the electrode assembly comprises: an insulating sheet and at least two layers of electrode sheets, the insulating sheet and the electrode sheets are stacked, and the insulating sheet is sandwiched between two adjacent layers of the electrode sheets; the electrode sheet comprises a current collector layer and an adsorption layer, and the adsorption layer is provided on both the front and back sides of the current collector layer; the two adjacent layers of the electrode sheets are respectively configured as a positive electrode sheet and a negative electrode sheet, and a water passage for accommodating the insulating sheet is formed between the positive electrode sheet and the negative electrode sheet; The inner and outer ends of the electrode assembly relative to the water outlet pipe are correspondingly formed as a water outlet end and a water inlet end; the water inlet end is connected to the water outlet end through the water passage, and the water outlet end extends to the peripheral wall of the water outlet pipe and forms a fluid connection with the first water hole.

[0015] According to an embodiment of the present invention, two adjacent layers of the electrode sheets are arranged opposite to each other along the stacking direction, and the insulating sheet and the electrode sheet are staggered along the stacking direction, so that the electrode sheet is hidden between the two adjacent layers of the insulating sheets.

[0016] According to an embodiment of the present invention, a plurality of groups of the first water holes are provided on the peripheral wall of the water outlet pipe along the circumferential direction, and each group of the first water holes is arranged along the axial direction of the water outlet pipe; The number of the electrode sheets is greater than two layers, so that the electrode assembly forms a plurality of water passages; the inner end of the electrode assembly forms a plurality of water outlets corresponding to the plurality of water passages, and the plurality of water outlets are arranged relative to the plurality of groups of the first water holes.

[0017] According to the water outlet control device of the water purification equipment of the second aspect of the present invention, the water purification equipment comprises: a pre-filter element, a capacitor deionizing filter element, a post-filter element and a reversing valve; the pre-filter element and the capacitor deionizing filter element are fluidically connected in sequence, and the capacitor deionizing filter element is respectively connected to the post-filter element and the wastewater outlet of the water purification equipment through the reversing valve; the device comprises: An acquisition module, used for acquiring a first TDS value of the water body received by the pre-filter and an outlet water flow rate of the post-filter; A determination module, used to determine the water output of the water purification device according to the water output flow rate and the water output time of the post-filter element; a first control module, configured to determine that the first TDS value is greater than a first preset value, control the application of a forward voltage to the capacitor deionization filter element, and control the reversing valve to be in a first state, so that the clean water output by the capacitor deionization filter element flows to the post-filter element; The second control module is used to determine that the water output is greater than a preset water volume, control the application of a reverse voltage to the capacitor deionization filter element, and control the reversing valve to be in a second state so that the wastewater output by the capacitor deionization filter element flows to the wastewater outlet.

[0018] According to an embodiment of the third aspect of the present invention, the electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the water output control method of the water purification device as described above is implemented.

[0019] According to the non-transitory computer-readable storage medium of the fourth aspect of the present invention, a computer program is stored thereon, and when the computer program is executed by a processor, the water outlet control method of the water purification device as described above is implemented.

[0020] A computer program product according to an embodiment of the fifth aspect of the present invention includes a computer program, which, when executed by a processor, implements the water outlet control method of the water purification device as described above.

[0021] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: The water outlet control method shown in the present invention organically combines a pre-filter element, a capacitor deionization filter element and a post-filter element through a reversing valve. When the first TDS value of the water body received by the pre-filter element is greater than the first preset value, a positive voltage is controlled to be applied to the capacitor deionization filter element, and the reversing valve is controlled to be in a first state, so as to ensure that after the pre-filter element filters the raw water, the capacitor deionization filter element desalinates the water body output by the pre-filter element, and the post-filter element again filters the clean water output by the capacitor deionization filter element, so as to realize the water outlet of the water purification component in the clean water outlet mode; and when the water outlet of the post-filter element is greater than the preset water volume, a reverse voltage is controlled to be applied to the capacitor deionization filter element, and the reversing valve is controlled to be in a second state, so as to ensure that after the pre-filter element filters the raw water, the ions adsorbed by the capacitor deionization filter element in the desalination state are automatically detached and discharged from the wastewater outlet together with the received water body, so as to realize the water outlet of the water purification component in the wastewater outlet mode.

[0022] From the above, it can be seen that the water outlet control method shown in the present invention integrates the pre-filter element, the capacitor deionization filter element and the post-filter element into one, realizes the optimization of the water channel structure, and can conveniently realize the switching between the clean water outlet mode and the wastewater outlet mode.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0025] Figure 1 It is a schematic diagram of the waterway structure of the water purification equipment provided by an embodiment of the present invention; Figure 2 It is a schematic flow chart of a water outlet control method of a water purification device provided in an embodiment of the present invention; Figure 3 It is a schematic structural diagram of a water purification assembly formed by a pre-filter element, a capacitive deionizing filter element and a post-filter element provided in an embodiment of the present invention; Figure 4 The embodiment of the present invention provides Figure 3 One of the schematic cross-sectional views of the water purification assembly shown; Figure 5 The embodiment of the present invention provides Figure 3 A second schematic cross-sectional view of the water purification assembly shown; Figure 6 The embodiment of the present invention provides Figure 3 The schematic diagram of the structure of the water purification component shown in the figure without the shell; Figure 7 is a schematic diagram of the structure of a capacitive deionizing filter element provided in an embodiment of the present invention; Figure 8 It is a schematic structural diagram of an assembly of a water outlet pipe and a flow guide pipe provided in an embodiment of the present invention; Fig. 9 It is a cross-sectional schematic diagram of the assembly of a water outlet pipe and a flow guide pipe provided in an embodiment of the present invention; Fig.10 The embodiment of the present invention provides Fig. 9 A partial enlarged schematic diagram of the middle K section; Fig.11 It is a schematic structural diagram of an electrode assembly provided by an embodiment of the present invention wound around the peripheral wall of a water outlet pipe; Fig.12 is a schematic structural diagram of an end cover provided by an embodiment of the present invention; Fig.13 is a cross-sectional schematic diagram of a stacked arrangement of an electrode assembly provided by an embodiment of the present invention; Fig.14 is a cross-sectional schematic diagram of an electrode sheet provided by an embodiment of the present invention; Fig.15 It is a structural schematic diagram of a water outlet control device for a water purification device provided in an embodiment of the present invention; Fig.16 is a schematic diagram of the structure of an electronic device provided by an embodiment of the present invention; Reference numerals: 1. Shell; 101. Water inlet port; 102. Water outlet port; 111. Water outlet space; 112. Accommodation space; 121. Partition; 2. Capacitor deionization filter element; 21. Water outlet pipe; 22. Electrode assembly; 23. Flow guide tube; 211. First water hole; 212. Water outlet; 201. Water gap; 202. Second water hole; 230. Blocking member; 2301. Blocking plate; 2302. Protrusion; 221. Insulating sheet; 222. Electrode sheet; 2201. Water channel; 2221. Current collector layer; 2222. Adsorption layer; 2001. Positive electrode ear; 2002. Negative electrode ear; 3. first end cover; 31. first side wall; 32. first cover body; 33. first rubber retaining wall; 4. second end cover; 41. second cover body; 42. second rubber retaining wall; 43. second side wall; 5. Electrical connection assembly; 51. Positive terminal; 52. Negative terminal; 10. On-off valve; 20. Pre-filter element; 30. Flow regulating valve; 40. Reversing valve; 50. Post-filter element; 501. Housing; 502. Filter element body; 5001. Water outlet channel; 60. Flow meter; 70. Sterilization element; 100. First TDS sensor; 200. Second TDS sensor; 300. Third TDS sensor. DETAILED DESCRIPTION

[0026] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0027] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0028] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0029] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0031] Combine the following Figure 1-Figure 16 , the water outlet control method and device of the water purification equipment provided by the embodiment of the present invention are described in detail through specific embodiments and their application scenarios.

[0032] In the first aspect, Figure 1 , Figure 3 and Figure 4 As shown, an embodiment of the present invention provides a water purification device, which includes: a pre-filter element 20, a capacitor deionizing filter element 2, a post-filter element 50 and a reversing valve 40; the pre-filter element 20 and the capacitor deionizing filter element 2 are fluidically connected in sequence, and the capacitor deionizing filter element 2 is respectively connected to the post-filter element 50 and the wastewater outlet of the water purification device through the reversing valve 40; The reversing valve 40 has a first state and a second state. When the reversing valve 40 is in the first state, the reversing valve 40 is used to control the clean water output by the capacitor deionizing filter element 2 to flow to the post-filter element 50, and the post-filter element 50 is connected to the clean water outlet of the water purification equipment; when the reversing valve 40 is in the second state, the reversing valve 40 is used to control the waste water output by the capacitor deionizing filter element 2 to flow to the waste water outlet of the water purification equipment.

[0033] It is understandable that the pre-filter element 20 is used to physically filter the impurities in the water body. According to the material selected by the pre-filter element 20, the pre-filter element 20 can be any one of PP cotton filter element, carbon rod filter element or carbon fiber filter element. Alternatively, the pre-filter element 20 includes multiple layers of filter elements, which are sequentially set as one from the inside to the outside, and each layer of filter element includes any one of PP cotton filter element, carbon rod filter element or carbon fiber filter element; wherein the types of adjacent two layers of filter elements are different; for example, when the pre-filter element 20 is a two-layer filter element, the filter element in the outer layer can be a PP cotton filter element, and the filter element in the outer layer can be a carbon rod filter element or a carbon fiber filter element.

[0034] The capacitor deionization filter element 2 can be configured in a columnar shape. The capacitor deionization filter element 2 has an inlet end and an outlet end. The inlet end of the capacitor deionization filter element 2 is used to receive the water output by the pre-filter element 20. When the capacitor deionization filter element 2 works in a desalination state, the outlet end of the capacitor deionization filter element 2 is used to output clean water after desalination treatment; when the capacitor deionization filter element 2 works in a regeneration state, the outlet end of the capacitor deionization filter element 2 is used to output waste water.

[0035] Specifically, the capacitor deionization filter element 2 generally includes an electrode assembly 22, which includes a stacked positive electrode sheet and a negative electrode sheet, the positive electrode sheet and the negative electrode sheet are isolated from each other, and a flow channel for water flow is formed between the positive electrode sheet and the negative electrode sheet; when a positive voltage is applied to the positive electrode sheet and the negative electrode sheet, the capacitor deionization filter element 2 works in a desalination state, and cations, anions or charged particles in the water body will migrate to the surfaces of the positive electrode sheet and the negative electrode sheet under the action of the electric field force, so that the electrode assembly 22 will output clean water after desalination treatment; when a reverse voltage is applied to the positive electrode sheet and the negative electrode sheet, the capacitor deionization filter element 2 works in a regeneration state, and the anions, cations or charged particles adsorbed on the surfaces of the positive electrode sheet and the negative electrode sheet will automatically detach, so that the electrode assembly 22 will output wastewater with a higher concentration.

[0036] The post-filter element 50 is used to physically filter the desalinated clean water output by the capacitor deionization filter element 2 again; according to the material selected for the post-filter element 50, the post-filter element 50 can be any one of a carbon rod filter element or a carbon fiber filter element.

[0037] The reversing valve 40 may be a two-position three-way electromagnetic reversing valve 40, and the reversing valve 40 may be configured to be electrically connected to a control module or an electric control unit, and the control module or the electric control unit controls the reversing valve 40 to switch between a first state and a second state. When the capacitor deionizing filter element 2 works in a desalination state, the reversing valve 40 is in the first state; when the capacitor deionizing filter element 2 works in a regeneration state, the reversing valve 40 is in the second state.

[0038] Furthermore, the pre-filter element 20, the capacitor deionizing filter element 2 and the post-filter element 50 are installed in the shell 1 to form a water purification component; the shell 1 has a accommodating chamber and a water inlet port 101, a water outlet port 102 and a wastewater outlet connected to the accommodating chamber; the pre-filter element 20, the capacitor deionizing filter element 2 and the post-filter element 50 are respectively arranged in the accommodating chamber; the water inlet port 101, the pre-filter element 20 and the capacitor deionizing filter element 2 form a fluid connection in sequence, and a fluid connection is formed between the post-filter element 50 and the water outlet port 102.

[0039] As can be seen from the above, by arranging the pre-filter element 20, the capacitor deionizing filter element 2 and the post-filter element 50 in the shell 1, and configuring the shell 1 with a accommodating chamber and a water inlet port 101, a water outlet port 102 and a wastewater outlet connected to the accommodating chamber, this design integrates the pre-filter element 20, the capacitor deionizing filter element 2 and the post-filter element 50 into one based on the shell 1, occupies a small space, and simplifies the water path structure of the existing water purification component.

[0040] Furthermore, if Figure 2 As shown, an embodiment of the present invention further provides a water outlet control method for the water purification device as described above. The execution subject of the method may be a server or a controller of the water purification device. The method comprises the following steps: Step S21, obtaining a first TDS value of the water received by the pre-filter element 20 and an outlet flow rate of the post-filter element 50; It is understandable that if Figure 1 As shown, by setting a first TDS sensor 100 on the water inlet side of the pre-filter element 20, the first TDS sensor 100 can be used to collect the first TDS value of the water body received by the pre-filter element 20; by setting a flow meter 60 on the water outlet side of the post-filter element 50, the flow meter 60 can be used to collect the water outlet flow of the post-filter element 50.

[0041] Step S22, determining the water output of the water purification device according to the water output flow rate and the water output time of the post-filter element 50; It is understandable that since the water output is the integral of the flow rate over time, taking into account that the water output flow rate of the water purifier may change in real time, according to the user's drinking habits, in the same time period (for example, a week or a month), the user may take water multiple times, and the water purifier will start and run each time water is taken. Therefore, each time the water purifier starts and runs, the water output flow rate of the water purifier will be integrated with the water output time to obtain the water output each time the water purifier starts and runs, and then the water output each time the water purifier starts and runs will be accumulated to obtain the current water output of the water purifier.

[0042] Step S23, determining that the first TDS value is greater than the first preset value, controlling the application of a positive voltage to the capacitor deionization filter element 2, and controlling the reversing valve 40 to be in a first state, so that the clean water output by the capacitor deionization filter element 2 flows to the post-filter element 50; It is understandable that the first preset value may be 10-100 ppm. When the first TDS value is greater than the first preset value, it can be considered that the hardness of the water received by the pre-filter 20 is relatively high and the water needs to be deionized.

[0043] TDS is the abbreviation of Total Dissolved Solids. The TDS value refers to the concentration of total dissolved substances in water, in milligrams per liter (mg / L), which mainly reflects the Ca content in water. 2+ Mg 2+ 、Na + , K + The concentration of plasma.

[0044] When a positive voltage is applied to the capacitor deionization filter element 2, the capacitor deionization filter element 2 operates in a desalination state, and the capacitor deionization filter element 2 desalinates the water received from the pre-filter element 20; when the reversing valve 40 is in a first state, a fluid connection is formed between the capacitor deionization filter element 2 and the post-filter element 50, and the post-filter element 50 is used to filter the desalinated water output by the capacitor deionization filter element 2 again.

[0045] Step S24, determining that the water output is greater than the preset water output, controlling the application of a reverse voltage to the capacitor deionization filter element 2, and controlling the reversing valve 40 to be in a second state, so that the wastewater output by the capacitor deionization filter element 2 flows to the wastewater outlet.

[0046] It is understandable that when the water output is greater than the preset water volume, it can be considered that a large number of anions, cations or other charged particles are adsorbed on the electrode assembly 22 of the capacitor deionization filter element 2, and the capacitor deionization filter element 2 can no longer adsorb the charged particles or ions in the newly input water body or the adsorption effect on these charged particles or ions is small, and the desalination capacity of the capacitor deionization filter element 2 is greatly reduced. At this time, it is necessary to control the capacitor deionization filter element 2 to work in a regeneration state.

[0047] When a reverse voltage is applied to the capacitor deionization filter element 2, the capacitor deionization filter element 2 operates in a regeneration state, and the ions adsorbed by the capacitor deionization filter element 2 in the desalination state are automatically detached 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.

[0048] The water outlet control method shown in the present invention organically combines the pre-filter element 20, the capacitor deionizing filter element 2 and the post-filter element 50 through the reversing valve 40. When the first TDS value of the water body received by the pre-filter element 20 is greater than the first preset value, the capacitor deionizing filter element 2 is controlled to apply a positive voltage, and the reversing valve 40 is controlled to be in the first state, so as to ensure that after the pre-filter element 20 filters the raw water, the capacitor deionizing filter element 2 desalinates the water body output by the pre-filter element 20, and the post-filter element 50 re-filters the capacitor deionizing filter element 2. The clean water output by the capacitor deionizing filter element 2 is filtered and processed to realize the water outlet of the water purification component in the clean water outlet mode; and when the water outlet of the post-filter element 50 is greater than the preset water volume, the reverse voltage is controlled to be applied to the capacitor deionizing filter element 2, and the reversing valve 40 is controlled to be in the second state, to ensure that after the pre-filter element 20 filters the raw water, the ions adsorbed by the capacitor deionizing filter element 2 in the desalination state are automatically detached, and are discharged from the wastewater outlet together with the received water, to realize the water outlet of the water purification component in the wastewater outlet mode.

[0049] As can be seen from the above, the water outlet control method shown in the present invention integrates the pre-filter element 20, the capacitor deionization filter element 2 and the post-filter element 50 into one, optimizes the water channel structure, and can easily switch between the clean water outlet mode and the wastewater outlet mode.

[0050] In some embodiments, Figure 4 and Figure 5 As shown, the pre-filter element 20 is sleeved on the outside of the capacitor deionizing filter element 2, and the capacitor deionizing filter element 2 and the post-filter element 50 are coaxially arranged; the post-filter element 50 includes a housing 501 and a filter element body 502, the filter element body 502 is arranged in the housing 501, a water flow space is formed between the filter element body 502 and the housing 501, and a water outlet flow channel 5001 is arranged in the filter element body 502; The first port of the reversing valve 40 is connected to the water outlet end of the capacitor deionizing filter element 2, the second port of the reversing valve 40 is connected to the water flow 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; 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 water outlet port 102 is used as a wastewater outlet.

[0051] It is understandable that the pre-filter element 20 is cylindrical and the capacitor deionizing filter element 2 is columnar. When the pre-filter element 20 is sleeved on the outside of the capacitor deionizing filter element 2, the pre-filter element 20 and the capacitor deionizing filter element 2 can be configured to be coaxial or non-coaxial, and there is no specific limitation on this.

[0052] When the pre-filter element 20, the capacitor deionizing filter element 2 and the post-filter element 50 are arranged in the housing 1, since the pre-filter element 20 is sleeved on the outside of the capacitor deionizing filter element 2 to form a composite filter element, the first end of the composite filter element is abutted against the inner wall of the first end of the housing 1, the second end of the composite filter element is abutted against the first end of the post-filter element 50, and the second end of the post-filter element 50 is abutted against the inner wall of the second end of the housing 1.

[0053] The two ends of the composite filter element along the axial direction are both configured as a sealing design, and the water outlet end of the capacitive deionizing filter element 2 extends out of the second end of the composite filter element and is connected to the post-filter element 50 through the reversing valve 40.

[0054] At the same time, for the post-filter element 50, a water outlet channel 5001 extending along the axial direction of the capacitor deionization filter element 2 is provided in the filter element body 502, and the filter element body 502 is sealed at both ends along its axial direction; in this way, when the reversing valve 40 is in the first state, the clean water output by the capacitor deionization filter element 2 enters the water flow space 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 of the filter element body 502 and discharges it from the water outlet port 102; when the reversing valve 40 is in the second state, the waste water output by the capacitor deionization 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.

[0055] In some embodiments, when the first TDS value exceeds the first preset value, the water output control method shown in the present invention further includes: Obtain a second TDS value of the water output by the post-filter element 50; Determine that the second TDS value is not lower than the second preset value, and control the reversing valve 40 to be in the second state so that the water output by the capacitor deionization filter element 2 flows to the wastewater outlet; Determine that the second TDS value is lower than the second preset value, and control the reversing valve 40 to be in the first state, so that the water output by the capacitor deionization filter element 2 flows to the post-filter element 50; The second TDS value is smaller than the first TDS value.

[0056] It is understandable that if Figure 1 As shown, the water purification device is provided with a second TDS sensor 200, which is arranged between the reversing valve 40 and the post-filter element 50, and the second TDS sensor 200 is used to detect the second TDS value of the water output by the post-filter element 50. The first TDS sensor 100 and the second TDS sensor 200 are electrically connected to the control module respectively, and the control module is electrically connected to the capacitor deionization cell.

[0057] When the TDS value fed back by the first TDS sensor 100 is greater than the first preset value, for example, the first preset value is 10-100ppm, the control module controls the capacitor deionization filter element 2 to operate in the water purification state; when the TDS value fed back by the second TDS sensor 200 is less than the second preset value, the control module controls the reversing valve 40 to be in the first state, so that the purified water output by the capacitor deionization filter element 2 flows to the post-filter element 50, and the post-filter element 50 filters the purified water output by the capacitor deionization filter element 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 capacitor deionization filter element 2 flows to the wastewater outlet, so that only when the TDS value of the water output by the capacitor deionization filter element 2 meets the requirements, the water output by the capacitor deionization filter element 2 is controlled by the reversing valve 40 to flow to the post-filter element 50.

[0058] In some embodiments, the water outlet control method shown in the present invention further includes: using the following formula to determine the water purification capacity of the capacitive deionization filter element 2: S=1-(K1 / K2); Wherein, S is the water purification capacity, K1 is the second TDS value of the water output by the post-filter element 50 , and K2 is the first TDS value of the water received by the pre-filter element 20 .

[0059] In some embodiments, Figure 1 As shown, the water purification device also includes: a flow regulating valve 30, the flow regulating valve 30 is arranged between the capacitor deionizing filter element 2 and the reversing valve 40; after the capacitor deionizing filter element 2 receives the forward voltage, the water outlet control method shown in this embodiment also includes: According to the difference between the outflow flow rate and the set flow rate, the opening of the flow regulating valve 30 is controlled so that the outflow flow rate is equal to 90% to 110% of the set flow rate.

[0060] It is understandable that in actual applications, the difference between the water outlet flow rate and the set flow rate can be set as close to zero as possible. If it is detected that the water outlet flow rate is 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%.

[0061] In some embodiments, the water outlet control method shown in the present invention further includes: Obtain the clean water flow and waste water flow output by the capacitor deionization filter element 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.

[0062] It can be understood that when the water purification equipment works in the clean water outlet mode, the clean water flow output by the capacitor deionization filter element 2 is obtained; when the water purification equipment works in the wastewater outlet mode again, the wastewater flow output by the capacitor deionization filter element 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 wastewater ratio advantage of the water purification equipment.

[0063] In some embodiments, Figure 1 As shown, the water purification device also includes a switch valve 10, which is used to control the water supply system to supply water to the front filter element 20; after the capacitor deionization filter element 2 receives the reverse voltage, the water output control method shown in the present invention also includes: Get the third TDS value of the water body output from the wastewater outlet; It is determined that the difference between the third TDS value and the first TDS value is less than the third preset value, the switch valve 10 is controlled to be closed, the capacitor deionization filter element 2 is controlled to stop running, and the reversing valve 40 is controlled to switch from the second state to the first state.

[0064] It is understandable that the water purification device further includes a third TDS sensor 300, which is disposed between the reversing valve 40 and the wastewater outlet, and is used to detect a third TDS value of the wastewater output by the capacitor deionization filter element 2. The first TDS sensor 100 and the third TDS sensor 300 are electrically connected to the control module, respectively, and the control module is electrically connected to the capacitor deionization cell.

[0065] When the capacitor deionizing filter element 2 receives the reverse voltage, the capacitor deionizing filter element 2 works in the regeneration state and discharges wastewater. The control module can judge whether the capacitor deionizing filter element 2 has completed regeneration based on the difference in 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 capacitor deionizing filter element 2 has completed regeneration. At this time, the control module can control the capacitor deionizing filter element 2 to stop powering, or control the reversing valve 40 to switch from the second state to the first state, and control the capacitor deionizing filter element 2 to work in the water purification state.

[0066] In some embodiments, Figure 1 As shown, the water purification device further includes: a sterilizing element 70 and a water supply port, wherein the sterilizing element 70 is arranged on the pipeline between the post-filter element 50 and the water supply port; after the capacitor deionizing filter element 2 receives the forward voltage, the method further includes: The sterilizing element 70 is controlled to start running to sterilize the water outputted by the post-filter element 50 .

[0067] It is understandable that the sterilization element 70 can be configured to be electrically connected to the control module. The sterilization element 70 can be an ultraviolet sterilization lamp to sterilize the purified water output by the post-filter element 50 by ultraviolet irradiation; the sterilization element 70 can also include an ultraviolet lamp and a titanium dioxide photocatalytic layer, which can generate active oxygen such as hydroxyl radicals under the irradiation of ultraviolet rays combined with titanium dioxide to achieve sterilization.

[0068] In some embodiments, Figure 4 and Figure 5 As shown, the capacitive deionization filter element 2 includes a water outlet pipe 21, a flow guide pipe 23 and an electrode assembly 22. The electrode assembly 22 is wound around the peripheral wall of the water outlet pipe 21. The electrode assembly 22 is sealed at both ends along the axial direction of the water 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 clean water or waste water. The peripheral wall of the water outlet pipe 21 is provided with a first water 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 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 sealedly connected to the inner wall of the water outlet pipe 21, and a second water hole 202 is formed between the second end of the guide pipe 23 and the second end of the water outlet pipe 21; The first water passing hole 211 , the water passing gap 201 , the second water passing hole 202 , the inner cavity of the flow guide pipe 23 and the water outlet 212 are sequentially connected to form a fluid.

[0069] It is understood that the electrode assembly 22 generally includes a positive electrode sheet and a negative electrode sheet stacked together, the positive electrode sheet and the negative electrode sheet are isolated from each other, and a flow channel for water flow is formed between the positive electrode sheet and the negative electrode sheet.

[0070] like Fig.11 As shown, when the electrode assembly 22 is wound, the inner side surface 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 in a columnar distribution.

[0071] Since the electrode assembly 22 is wound around the peripheral wall of the water outlet pipe 21 and the electrode assembly 22 is sealed at both ends along the axial direction of the water outlet pipe 21, when a positive voltage is applied to the positive electrode sheet and the negative electrode sheet, the cations, anions or charged particles in the water body will migrate to the surface of the positive electrode sheet and the negative electrode sheet under the action of the electric field force, so that the inner side of the electrode assembly 22 outputs the clean water after desalination treatment; when a reverse voltage is applied to the positive electrode sheet and the negative electrode sheet, or when the voltage is stopped, the anions, cations or charged particles adsorbed on the surface of the positive electrode sheet and the negative electrode sheet will automatically detach, so that the inner side of the electrode assembly 22 outputs wastewater with a higher concentration.

[0072] Considering that the surrounding wall of the existing water outlet pipe 21 is usually densely covered with multiple water holes, the water output from the inner side of the electrode assembly 22 will evenly pass through each water hole into the water outlet channel. If bubbles appear in the electrode assembly 22, the bubbles may adhere to the surface of the positive electrode sheet and / or the negative electrode sheet, and the flowing water will not have an effect on the desorption of the bubbles. However, the present application provides a guide tube 23 through the water outlet pipe 21, and provides a second water hole 202 between the second end of the guide tube 23 and the second end of the water outlet pipe 21, so that the second water hole 202 is arranged away from the water outlet 212. This design can limit the water output from the inner side of the electrode assembly 22 to gradually converge toward the area where the second water hole 202 is located after entering the water gap 201 from the first water hole 211, and then enter the guide tube 23 through the second water hole 202, and finally be output from the water outlet 212 under the guidance of the guide tube 23. In the process of water flow, since the second water hole 202 is arranged away from the water outlet 212, the flowing water gradually converges toward the area where the second water hole 202 is located, which will gradually squeeze the bubbles generated in the electrode assembly 22 to the area where the second water hole 202 is located, and then be discharged together with the water under the guidance of the guide tube 23, thereby effectively removing the bubbles appearing in the capacitor deionization filter element 2.

[0073] From the above, it can be seen that during the desalination process of the capacitor deionization filter element 2, the bubbles generated in the filter element can be effectively discharged, which can prevent the capacitor deionization filter element 2 from generating noise during operation, ensure the stability of the internal electric field of the electrode assembly 22, and thus also ensure the water purification effect of the capacitor deionization filter element 2.

[0074] It should be pointed out here that the capacitive deionization filter element 2 also includes a protective cover, for example, the protective cover is a cylindrical rubber film, the protective cover is arranged on the peripheral wall of the electrode assembly 22, and a plurality of water outlets are constructed on the protective cover to ensure that the water body can reach the outside of the electrode assembly 22 through the water outlets, and then the electrode assembly 22 desalinates the received water body.

[0075] In some embodiments, Figure 8 and Fig. 9 As shown, a blocking member 230 is provided in the water outlet pipe 21, and the blocking member 230 is arranged at a position close to the second end of the water outlet pipe 21; the peripheral wall of the first end of the guide pipe 23 is sealedly connected to the inner wall of the first end of the water outlet pipe 21, and a second water hole 202 is formed between the second end of the guide pipe 23 and the blocking member 230.

[0076] It is understandable that the axial distance between the blocking member 230 and the second end of the water outlet pipe 21 is smaller than the axial distance between the blocking member 230 and the first end of the water outlet pipe 21 .

[0077] The length of the flow guide pipe 23 can be configured such that the axial length between the plugging member 230 and the first end of the water outlet pipe 21 is equal. A sealing ring can be used to achieve a sealed connection between the peripheral wall of the first end of the flow guide pipe 23 and the inner wall of the first end of the water outlet pipe 21. The second end of the flow guide pipe 23 can be configured to abut against the plugging member 230, but a gap is reserved between the second end of the flow guide pipe 23 and the plugging member 230 to form the second water passage hole 202.

[0078] Furthermore, if Fig. 9 and Fig.10 As shown, the blocking member 230 includes: a blocking plate 2301 and a plurality of protrusions 2302; the blocking plate 2301 is connected to the inner wall of the water outlet pipe 21, for example, the periphery of the blocking plate 2301 is connected to the inner wall of the water outlet pipe 21; the plurality of protrusions 2302 are arranged on the side of the blocking plate 2301 facing the water outlet 212, and the plurality of protrusions 2302 are arranged at intervals along the circumferential direction, the second end of the guide tube 23 abuts against at least part of the plurality of protrusions 2302, and a second water passage 202 is formed between two adjacent protrusions 2302.

[0079] It is understandable that, since the plurality of protrusions 2302 are arranged at intervals along the circumferential direction, a plurality of second water holes 202 are provided, and the plurality of second water holes 202 are defined to be arranged along the circumferential direction, and each second water hole 202 can realize fluid communication between the water gap 201 and the inner cavity of the guide tube 23.

[0080] In some embodiments, in order to ensure the exhaust effect of the capacitor deionization filter 2, the axial distance between the blocking 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.

[0081] It is understandable that, since the second water hole 202 is formed between the second end of the guide tube 23 and the blocking member 230 , the axial length between the second water hole 202 and the water outlet 212 accounts for no more than 15% of the length of the water outlet pipe 21 .

[0082] Optionally, the length of the capacitor deionizing filter element 2 is approximately 333-350 mm, and the axial distance between the sealing member 230 and the second end of the water outlet pipe 21 can be set to be less than 50 mm, so that the second water hole 202 is as far away from the water outlet 212 of the capacitor deionizing filter element 2 as possible, thereby ensuring the exhaust effect.

[0083] In some embodiments, there are multiple second water holes 202, and the sum of the water flow areas of the multiple second water holes 202 is not less than 20 mm². For example, the sum of the water flow areas of the multiple second water holes 202 is 20 mm², 25 mm², 35 mm², and 50 mm², etc. This design avoids a large flow resistance when the water passes through the second water holes 202, and prevents the second water holes 202 from limiting the flow of the water.

[0084] In some embodiments, Figure 4 , Fig.13 and Fig.14 As shown, the electrode assembly 22 includes: an insulating sheet 221 and at least two layers of electrode sheets 222, the insulating sheet 221 and the electrode sheets 222 are stacked, and the insulating sheet 221 is sandwiched between two adjacent layers of electrode sheets 222; the electrode sheet 222 includes a current collector layer 2221 and an adsorption layer 2222, and the adsorption layer 2222 is provided on both the front and back sides of the current collector layer 2221; the two adjacent layers of electrode sheets 222 are respectively configured as a positive electrode sheet and a negative electrode sheet, and a water passage 2201 for accommodating the insulating sheet 221 is formed between the positive electrode sheet and the negative electrode sheet; The inner and outer ends of the electrode assembly 22 relative to the water outlet pipe 21 are correspondingly formed as a water outlet end and a water inlet end; the water inlet end is connected to the water outlet end through the water passage 2201, and the water outlet end extends to the peripheral wall of the water outlet pipe 21 and forms a fluid connection with the first water hole 211.

[0085] It is understandable that the insulating sheet 221 and the electrode sheet 222 are stacked in an alternating arrangement so that the insulating sheet 221 is sandwiched between two adjacent layers of electrode sheets 222. Since the two adjacent layers of electrode sheets 222 are respectively configured as positive and negative electrodes, when the number of electrode sheets 222 is greater than two layers, in order to meet the water filtration requirements of the electrode assembly 22 for raw water, when the electrode assembly 22 is powered on, the positive and negative electrodes can be alternately arranged in the stacking direction, the insulating sheet 221 can be sandwiched between the positive and negative electrodes, and the current collector layer 2221 of the positive electrode sheet is electrically connected to the positive electrode of the power supply, and the current collector layer 2221 of the negative electrode sheet is electrically connected to the negative electrode of the power supply. When the number of electrode sheets 222 is equal to two layers, the insulating sheet 221 can be directly sandwiched between the positive and negative electrodes.

[0086] For the electrode sheet 222, the current collector layer 2221 of the electrode sheet 222 can be made of metal or graphite material so that the current collector layer 2221 forms a conductive layer, and the adsorption layer 2222 of the electrode sheet 222 can be made of activated carbon and other adsorption materials to achieve adsorption of ions in raw water.

[0087] In some embodiments, the adsorption layer 2222 includes activated carbon, titanium dioxide, a conductive agent, and a binder, and the mass ratio of activated carbon to titanium dioxide is (5-1): 1. This design can utilize the excellent adsorption performance of activated carbon to adsorb ions in raw water. There are many functional groups (carboxyl, hydroxyl, etc.) on the surface of titanium dioxide, which can react with heavy metal ions to remove heavy metals in water through surface complexation.

[0088] Specifically, in activated carbon, heavy metals are removed mainly through pore size adsorption, and there are many functional groups (carboxyl, hydroxyl, etc.) on the surface of titanium dioxide that can react with heavy metal ions to form a complex reaction. The heavy metals in water are removed by surface complexation, and the removal effect is achieved by combining the dual effects of complexation and adsorption. As for other beneficial ions in raw water, titanium dioxide cannot be removed, and can only be removed by the double electric layer and adsorption of activated carbon. Therefore, the beneficial ions can be retained by the regulation of the electric field. The inventor found that the mass ratio of activated carbon to titanium dioxide is controlled to (5~1):1. This design can not only effectively remove heavy metals in water, but also retain beneficial ions to achieve the purpose of water purification. For example, the mass ratio of activated carbon to titanium dioxide is 5:1, 4.5:1, 4:1, 3.5:1, 3:1, 2.5:1, 2:1, 1.5:1, 1:1, etc. Therefore, the present application can effectively remove heavy metal ions in water, retain beneficial ions required by the human body, and meet the needs of household water purification by adding titanium dioxide to the electrode material and controlling the mass ratio of activated carbon and titanium dioxide within the above range.

[0089] The current collector layer 2221 includes but is not limited to copper foil, aluminum foil, stainless steel foil, titanium foil, nickel foil, etc. The conductive agent includes but is not limited to acetylene black, conductive carbon black, graphite powder, etc. The binder includes but is not limited to polyurethane, polyvinylidene fluoride, polystyrene, polyacrylate, polytetrafluoroethylene, etc.

[0090] In some embodiments, heavy metals include but are not limited to Pb, As, Fe, Cr, Cu.

[0091] In some embodiments, the particle size of the activated carbon is 5 μm to 15 μm, the specific surface area of ​​the activated carbon is 1500 m² / g to 2200 m² / g, and the average pore size of the activated carbon is 1 nm to 5 nm. For example, the particle size of the activated carbon is 5 μm, 7 μm, 9 μm, 11 μm, 13 μm, 15 μm, etc., the specific surface area of ​​the activated carbon is 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 the average pore size of the activated carbon is 1 nm, 2 nm, 3 nm, 4 nm, 5 nm, etc. The inventors have found that when the particle size, specific surface area and average pore size of activated carbon are controlled within the above ranges, the activated carbon can provide more active sites and have a larger adsorption capacity, thereby having excellent ion adsorption performance and heavy metal removal ability, and the activated carbon can better cooperate with titanium dioxide to remove heavy metal ions and retain a certain amount of beneficial ions.

[0092] 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 when the particle size, surface area and average pore size of titanium dioxide are controlled within the above range, better active functional groups can be provided, and better ion complexing ability can be obtained, thereby improving the removal rate of heavy metals, and better synergizing with activated carbon, and retaining a certain amount of beneficial ions required by the human body on the basis of removing heavy metals.

[0093] In some embodiments, the mass proportion of the conductive agent is 2% to 5% based on the total mass of the adsorption layer 2222. For example, the mass proportion is 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, etc. Thus, the conductive property of the electrode sheet 222 is improved, and the electron transmission capacity of the electrode sheet 222 is improved.

[0094] In some embodiments, the mass proportion of the binder is 5% to 10% based on the total mass of the adsorption layer 2222. For example, the mass proportion is 5%, 6%, 7%, 8%, 9%, 10%, etc. Thus, the contact performance of each material of the adsorption layer 2222 is improved.

[0095] In some embodiments, the binder includes a cellulose binder grafted with active groups, the cellulose binder is sodium carboxymethyl cellulose and / or carboxymethyl cellulose, and the active groups include at least one of sulfonic acid, carboxyl, and amino groups. Cellulose binders have more hydroxyl groups. On the one hand, during the cyclic power-on process, -CH2-OH is easily oxidized to form carboxyl groups. The negative electrode material containing carboxyl groups is beneficial to improving the adsorption capacity for cations, inhibiting the adsorption of anions, reducing common ion repulsion, and increasing the adsorption amount. On the other hand, cellulose binders are easy to graft with sulfonic acid groups, amino groups and other groups. The grafted binder has anion and cation selectivity, reduces the phenomenon of reduced adsorption due to common ion repulsion, and significantly increases the ion adsorption amount. As a result, the capacitor deionization filter element has excellent ion adsorption and a high ion removal rate.

[0096] Furthermore, for the positive electrode sheet, the active group includes an amino group; for the negative electrode sheet, the active group includes at least one of a sulfonic acid group and a carboxyl group.

[0097] Further, based on the total mass of the adsorption layer 2222, the mass proportion of the cellulose-based binder is not less than 1%. For example, the mass proportion of the cellulose-based binder is not less than 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, etc. By controlling the mass proportion of the cellulose-based binder to be not less than 1%, it can be ensured that the binder has more active groups, thereby ensuring a larger ion adsorption amount, and improving the ion adsorption effect and ion removal rate of the electrode.

[0098] 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, and the phenomena of dissolution, shedding, peeling, cracking, etc. of the activated carbon material layer during operation are reduced. According to an embodiment of the present invention, based on the total mass of the adsorption layer 2222, the mass proportion of the binder is 2% to 15%. Preferably 3% to 7%. For example, the mass proportion is 2%, 5%, 7%, 10%, 12%, 15%, etc. The inventors have found that controlling the mass proportion of the binder within the above range can not only maintain the bonding performance and provide available selective groups, but also ensure the ratio of active ingredients and conductive agents and maintain the total adsorption amount. In the adsorption layer 2222, compared with the activated carbon material, the mass proportion of the binder is very small. Therefore, compared with the existing modification of activated carbon materials, the binder modification adopted in the present application can not only significantly reduce the production cost, but also from the perspective of adsorption performance, the performance of the electrode sheet 222 prepared by the binder modification in the present application is not inferior to that of the electrode sheet 222 prepared by modified activated carbon materials. Therefore, the present invention provides a new idea for improving the adsorption performance of the electrode sheet 222.

[0099] Furthermore, the activated carbon is grafted with the above active groups, which include at least one of sulfonic acid group, carboxyl group and amino group. By grafting active groups on the activated carbon material, the ion adsorption and ion removal rate of the electrode can be further improved.

[0100] At the same time, the insulating sheet 221 can be made of plastic material. The insulating sheet 221 is used to play a supporting role between the positive electrode sheet and the negative electrode sheet, which not only prevents the positive electrode sheet and the negative electrode sheet from short-circuiting, but also ensures that a water channel 2201 is formed between the positive electrode sheet and the negative electrode sheet.

[0101] In practical applications, the work of the capacitor deionization filter element 2 includes an adsorption purification process and a desorption regeneration process. When the two adjacent layers of electrode sheets 222 are electrically connected to the positive and negative electrodes of the power supply and the power supply is started, the anions and cations in the raw water are attracted to the electrode sheets 222 with opposite charges and adsorbed by the adsorption layer 2222 on the electrode sheets 222. This working process of the capacitor deionization filter element 2 is an adsorption purification process.

[0102] Correspondingly, when a reverse voltage is applied to two adjacent electrode sheets 222, the ions adsorbed by the adsorption layer 2222 are released into the water in the water passage 2201. At this time, the water passage 2201 outputs concentrated water with a higher ion concentration.

[0103] As can be seen from the above, the capacitor deionization filter element 2 shown in this embodiment realizes 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. It is only necessary to stack the electrode sheet 222 and the insulating sheet 221 in an alternating arrangement to form the electrode assembly 22; this stacking arrangement design of the electrode assembly 22 simplifies the arrangement structure of the electrode assembly 22, facilitates processing and production, and helps to reduce production costs.

[0104] At the same time, in practical applications, only two adjacent layers of electrode sheets 222 need to be electrically connected to the positive and negative electrodes of the power supply to adsorb the ions in the raw water passing through the water passage 2201, thereby achieving the purpose of purifying the raw water; since the two sides of the current collector layer 2221 of each electrode sheet 222 are provided with adsorption layers 2222, the two sides of each electrode sheet 222 can achieve the adsorption of ions, thereby ensuring the purification effect of the raw water to a certain extent. The capacitor deionization filter element 2 can effectively remove heavy metal ions in water, retain the beneficial ions required by the human body, and meet the needs of household water purification.

[0105] In some embodiments, Fig.13 As shown, in order to ensure the purification effect of raw water, two adjacent layers of electrode sheets 222 are arranged relative to each other along the stacking direction to ensure the coverage of the electric field between the two adjacent layers of electrode sheets 222 as much as possible, and then remove anions, cations and other charged particles in the raw water based on the electric field between the two adjacent layers of electrode sheets 222.

[0106] Furthermore, the insulating sheet 221 and the electrode sheet 222 are staggered along the stacking direction, so that the electrode sheet 222 is hidden between two adjacent layers of insulating sheets 221. This design ensures electrical isolation between two adjacent layers of electrode sheets 222, and also facilitates setting the water outlet end of the electrode assembly 22 at a position opposite to the first water hole 211 on the peripheral wall of the water outlet pipe 21, so as to ensure that the water passage 2201 in the electrode assembly 22 and the water gap 201 inside the water outlet pipe 21 maintain fluid unobstructed.

[0107] Among them, Fig.13 As shown, the stacking direction is along the thickness direction of the insulating sheet 221 or the electrode sheet 222 .

[0108] In some embodiments, Figure 8 , Fig. 9 and Fig.11As shown, the peripheral wall of the water outlet pipe 21 is provided with a plurality of groups of first water holes 211 along the circumferential direction, and each group of first water 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 the multiple groups of first water holes 211.

[0109] It is understandable that by setting the number of electrode sheets 222 to be greater than two layers, multiple water channels 2201 can be formed based on the electrode assembly 22, and the raw water flowing in multiple paths in the capacitor deionization filter element 2 can be purified at the same time, thereby improving the purification efficiency of the raw water.

[0110] At the same time, by setting multiple water outlet ends and multiple groups of first water holes 211 relative to each other, the smoothness of the water path between each water channel 2201 and the water gap 201 inside the outlet pipe 21 can be ensured, which is beneficial to ensure the clean water outlet flow rate of the capacitor deionization filter element 2.

[0111] In practical applications, while ensuring electrical isolation between two adjacent layers of electrode sheets 222 , the insulating sheet 221 at one end of the electrode assembly 22 close to the water outlet pipe 21 and the end of the electrode sheet 222 can be staggered in sequence along the extension direction of the electrode sheet 222 and arranged along the circumference of the water outlet pipe 21 .

[0112] In some embodiments, Figure 5 , Figure 7 and Fig.11 As shown, in order to facilitate the connection of two adjacent electrode sheets 222 with the positive and negative electrodes of the power source, the electrode assembly 22 also 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 sheet; the negative electrode tab 2002 is electrically connected to the current collector layer 2221 of the negative electrode sheet.

[0113] Specifically, a first extension portion is provided on one side of the current collector layer 2221 of each positive electrode sheet, and a second extension portion is provided on one side of the current collector layer 2221 of each negative electrode sheet; when the electrode assembly 22 is wound around the peripheral wall of the central column, the first extension portions of each positive electrode sheet are stacked to form a positive electrode tab 2001, and the second extension portions of each negative electrode sheet are stacked to form a negative electrode tab 2002.

[0114] In some embodiments, the current collector layer 2221 includes any one of copper foil, titanium foil, and graphite paper, and the current collector layer 2221 is configured to be electrically connected to the positive electrode or the negative electrode of the power source.

[0115] The adsorption layer 2222 is attached to the surface of the current collector layer 2221 . The adsorption layer 2222 includes an activated carbon layer. The activated carbon layer has excellent adsorption performance and can adsorb ions in raw water.

[0116] In some embodiments, since the thickness of the current collector layer 2221 of the electrode sheet 222 determines the supporting strength, winding difficulty and cost of the electrode sheet 222, if the current collector layer 2221 is too thin, the current collector layer 2221 is easily damaged, and if the current collector layer 2221 is too thick, the cost of the electrode sheet 222 is too high, the thickness of the current collector layer 2221 is set to 15-50 microns; optionally, the thickness of the current collector layer 2221 is specifically 25 microns, 30 microns, 35 microns, 40 microns, 45 microns, 50 microns, etc.

[0117] At the same time, since the thickness of the adsorption layer 2222 of the electrode sheet 222 determines the adsorption capacity and the adsorption speed, if the adsorption layer 2222 is too thick, the adsorption layer 2222 may crack during winding, so the thickness of the adsorption layer 2222 is set to 25-200 microns; optionally, the thickness of the adsorption layer 2222 is specifically 25 microns, 30 microns, 50 microns, 65 microns, 100 microns, 150 microns, 185 microns, 200 microns, etc.

[0118] In some embodiments, the insulating sheet 221 may be configured as a porous structure, for example, the insulating sheet 221 includes an insulating woven fabric or an insulating mesh. The insulating woven fabric may be a woven fabric or a melt-blown fabric.

[0119] In this way, although the insulating sheet 221 is arranged in the water passage 2201, since the insulating sheet 221 is a porous structure, the insulating sheet 221 will not affect the migration of ions between two adjacent electrode sheets 222, thereby not affecting the adsorption of ions in the water 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, and can ensure the adsorption effect of the adsorption layer 2222 on ions to a certain extent.

[0120] In some embodiments, considering that the greater the thickness of the insulating sheet 221, the smaller the water flow pressure loss and the lower the clogging risk, however, the greater the thickness of the insulating sheet 221, the greater the spacing between two adjacent electrode sheets 222, and thus the greater the resistance between two adjacent electrode sheets 222, resulting in worse water purification performance. In order to comprehensively consider the pressure loss and water purification effect, the thickness of the insulating sheet 221 is set to 0.1-1.0 mm; optionally, the thickness of the insulating sheet 221 is specifically set to 0.1mm, 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1.0mm, etc.

[0121] In some embodiments, Figure 4 , Figure 5 and Figure 6 As shown, the composite filter element includes a capacitive deionizing filter element 2 and a pre-filter element 20 coaxially sleeved on the outside of the capacitive deionizing filter element 2; the first end of the composite filter element abuts against the inner wall of the first end of the shell 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 shell 1.

[0122] Since the capacitor deionizing filter element 2 must rely on power supply to operate, in order to achieve a water-electricity isolation design, a accommodating space 112 is formed between the first end of the capacitor deionizing filter element 2 and the inner wall of the first end of the shell 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 shell 1. The accommodating 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 shell 1 are respectively located at the second end of the shell 1 and are connected to the accommodating cavity in the shell 1.

[0123] Among them, a first gap is left between the peripheral wall of the rear filter element 50 and the inner wall of the shell 1, a second gap is left between the peripheral wall of the front filter element 20 and the inner wall of the shell 1, the water inlet port 101, the first gap, the second gap and the front filter element 20 form fluid connection in sequence, and the water outlet channel 5001 of the rear filter element 50, the water outlet space 111 and the water outlet port 102 form fluid connection in sequence.

[0124] In some embodiments, Figure 5 As shown, the capacitor deionizing filter element 2 further includes: a power connection component 5 disposed in the accommodating space 112, including a positive terminal 51 and a negative terminal 52, the positive terminal 51 and the negative terminal 52 are used to connect to an external power source; The end of the capacitor deionizing filter element 2 away from the post filter element 50 is provided with a positive pole ear 2001 and a negative pole ear 2002, the positive terminal 51 is connected to the positive electrode sheet through the positive pole ear 2001, and the negative terminal 52 is connected to the negative electrode sheet through the negative pole ear 2002. This design facilitates the external power supply to apply voltage to the positive electrode sheet and the negative electrode sheet through the power connection component 5.

[0125] In some embodiments, Figure 4 , Figure 6 and Fig.12 As shown, the water purification device further includes: a first end cover 3; the first end cover 3 includes a first side wall 31 and a first cover body 32 which are bent and connected, the first side wall 31 abuts against the inner wall of the first end of the housing 1, the first cover body 32 is sealed and connected to the first end of the composite filter element, and the first cover body 32, the first side wall 31 and the inner wall of the first end of the housing 1 enclose a containing space 112; The electrode assembly 22 further includes a positive electrode tab 2001 connected to the positive electrode sheet and a negative electrode tab 2002 connected to the negative electrode sheet. 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.

[0126] It can be understood that the first cover body 32 is disc-shaped, and the first side wall 31 is extended circumferentially relative to the central axis of the capacitor deionization filter element 2; the first side wall 31 is arranged on the side of the first cover body 32 away from the capacitor deionization filter element 2, and abuts against the inner wall of the first end of the shell 1, so that the first cover body 32, the first side wall 31 and the inner wall of the shell 1 enclose a containing space 112.

[0127] In some embodiments, Figure 4 and Fig.12 As shown, the first end cover 3 also includes: a first rubber stop wall 33 bent and connected to the first cover body 32, the outer side of the first rubber stop wall 33 is sealed and connected to the inner wall of the housing 1, the first cover body 32 and the first end of the composite filter element are sealed and connected by filling glue, and the first rubber stop wall 33 is arranged on the outer side of the peripheral wall of the pre-filter element 20, for example, the inner side of the first rubber stop wall 33 is in contact with the peripheral wall of the pre-filter element 20. Of course, the inner side of the first rubber stop wall 33 and the peripheral wall of the pre-filter element 20 can also be arranged at intervals.

[0128] It is understandable that the filling glue forms a sealing glue layer at the first end of the composite filter element, and the first cover body 32 is in contact with the surface of the sealing glue layer to achieve sealing of the first end of the composite filter element.

[0129] The first rubber retaining wall 33 is arranged on the outer edge of the first cover body 32 and extends circumferentially relative to the center of the first cover body 32. The inner diameter of the first rubber retaining wall 33 is adapted to the diameter of the pre-filter element 20. The first rubber retaining wall 33 is used to prevent the filling rubber from overflowing to the peripheral wall of the pre-filter element 20.

[0130] A first support rib may be provided on a side of the first cover body 32 facing the composite filter element. The first support rib may be configured to extend radially along the capacitive deionizing filter element 2. The first support rib is used to ensure the thickness of the filling glue at the first end of the composite filter element and is beneficial to ensuring the molding quality of the filling glue.

[0131] The outer side surface of the first rubber stop wall 33 is sealedly connected to the inner wall of the shell 1 to prevent water from entering the accommodating space 112 formed by the first cover 32 , the first side wall 31 and the inner wall of the shell 1 .

[0132] In some embodiments, Figure 3 and Figure 4 As shown, a partition 121 is disposed on the inner wall of the second end of the housing 1 , and the partition 121 and the second end of the post-filter element 50 enclose a water outlet space 111 .

[0133] It is understandable that the partition 121 is extended circumferentially relative to the water outlet port 102, and the peripheral wall of the water outlet end of the post-filter element 50 is sealed to the inner side surface of the partition 121, so that the partition 121 and the second end of the post-filter element 50 enclose a water outlet space 111.

[0134] In some embodiments, Figure 3 and Figure 4 As shown, the water purification device further includes: a second end cover 4, the second end cover 4 includes a second cover body 41 and a second rubber stop 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, and the second cover body 41 is provided with a through hole, which is used to achieve communication between the water outlet 212 of the central column and the first port of the reversing valve 40; The second cover 41 is sealed and connected to the second end of the composite filter element by means of a filling glue, and the second glue blocking wall 42 is arranged on the outer side of the peripheral wall of the pre-filter element 20, for example, the inner side of the second glue blocking wall 42 is in contact with the peripheral wall of the pre-filter element 20; of course, the inner side of the second glue blocking wall 42 and the peripheral wall of the pre-filter element 20 can also be arranged at intervals; A third gap is left between the outer side surface of the second rubber retaining wall 42 and the inner wall of the housing 1 , and the water inlet port 101 , the first gap, the third gap, the second gap and the pre-filter element 20 are fluidically connected in sequence.

[0135] It is understandable that the filling glue forms a sealing glue layer at the second end of the composite filter element. The second glue retaining wall 42 is arranged at the outer edge of the second cover body 41 and extends circumferentially relative to the central column. The inner diameter of the second glue retaining wall 42 is adapted to the diameter of the pre-filter element 20.

[0136] Furthermore, if Figure 3 and Figure 4 As shown, the second end cover 4 also includes a second side wall 43, which is arranged on the side of the second cover body 41 facing the post-filter element 50 and extends circumferentially relative to the center column; the second side wall 43 is used to be sleeved on the peripheral wall of the post-filter element 50 to install and position the post-filter element 50.

[0137] A fourth gap is left between the outer side surface of the second side wall 43 and the inner wall of the shell 1 , and the water inlet port 101 , the first gap, the fourth gap, the third gap, the second gap and the pre-filter element 20 are fluidically connected in sequence.

[0138] Furthermore, in order to ensure the sealing effect on the second end of the composite filter element, a second support rib is provided on a side of the second cover body 41 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 glue at the second end of one side of the composite filter element, and is beneficial to ensure the molding quality of the filling glue.

[0139] In the second aspect, Figure 1 and Fig.15 As shown, an embodiment of the present invention further provides a water outlet control device for a water purification device, the water purification device comprising: a pre-filter element, a capacitor deionizing filter element, a post-filter element and a reversing valve; the pre-filter element and the capacitor deionizing filter element are fluidically connected in sequence, and the capacitor deionizing filter element is respectively connected to the post-filter element and the wastewater outlet of the water purification device through the reversing valve; the device comprises the following modules: An acquisition module 151 is used to acquire a first TDS value of the water body received by the pre-filter and an outlet flow rate of the post-filter; The determination module 152 is used to determine the water output of the water purification device according to the water output flow rate and the water output time of the post-filter element; 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 a first state, so that the clean water output by the capacitor deionization filter element flows to the post-filter element; The second control module 154 is used to determine that the water output is greater than the preset water 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.

[0140] It can be understood that the water outlet control device shown in the present 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 the first preset value, the capacitor deionization filter is controlled to apply a positive voltage to the capacitor deionization filter, and the reversing valve is controlled to be in the first state, to ensure that after the pre-filter filters the raw water, the capacitor deionization filter desalinates the water output by the pre-filter, and the post-filter filters the clean water output by the capacitor deionization filter again, so as to realize the water outlet of the water purification component in the clean water outlet mode; and when the water outlet of the post-filter is greater than the preset water volume, the capacitor deionization filter is controlled to apply a reverse voltage, and the reversing valve is controlled to be in the second state, so as to ensure that after the pre-filter filters the raw water, the ions adsorbed by the capacitor deionization filter in the desalination state are automatically detached and discharged from the wastewater outlet together with the received water, so as to realize the water outlet of the water purification component in the wastewater outlet mode.

[0141] From the above, it can be seen that the water outlet control device shown in the present invention integrates the pre-filter element, the capacitor deionization filter element and the post-filter element into one, realizes the optimization of the water channel structure, and can conveniently realize the switching between the clean water outlet mode and the wastewater outlet mode.

[0142] Fig.16 An example of a physical structure diagram of an electronic device is shown in FIG. Fig.16As shown, the electronic device may include: a processor (processor) 161, a communication interface (Communications Interface) 162, a memory (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 the logic instructions in the memory 163 to execute the water outlet control method of the water purification equipment described below, which includes: obtaining the first TDS value of the water body received by the pre-filter and the water outlet flow rate of the post-filter; determining the water outlet volume of the water purification equipment according to the water outlet flow rate and the water outlet time of the post-filter; determining that the first TDS value is greater than the first preset value, controlling the application of a forward voltage to the capacitor deionization filter, and controlling the reversing valve to be in a first state, so that the clean water output by the capacitor deionization filter flows to the post-filter; determining that the water outlet is greater than the preset water volume, controlling the application of a reverse voltage to the capacitor deionization filter, and controlling the reversing valve to be in a second state, so that the wastewater output by the capacitor deionization filter flows to the wastewater outlet.

[0143] In addition, the logic instructions in the above-mentioned memory 163 can be implemented in the form of a software functional unit and can be stored in a computer-readable storage medium when it is sold or used as an independent product. Based on such an understanding, the technical solution of the present invention can be essentially or partly embodied in the form of a software product that contributes to the relevant technology. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), disk or optical disk, etc. Various media that can store program codes.

[0144] On the other hand, an embodiment of the present invention discloses a computer program product, which includes a computer program stored on a non-transitory computer-readable storage medium, and the computer program includes program instructions. When the program instructions are executed by a computer, the computer can execute the water outlet control method of a water purification device provided by the above-mentioned method embodiments, the method including: obtaining a first TDS value of the water body received by the pre-filter and the water outlet flow rate of the post-filter; determining the water outlet volume of the water purification device according to the water outlet flow rate and the water outlet time of the post-filter; determining that the first TDS value is greater than a first preset value, controlling the application of a forward voltage to the capacitor deionization filter element, and controlling the reversing valve to be in a first state, so that the clean water output by the capacitor deionization filter element flows to the post-filter element; determining that the water outlet volume is greater than the preset water volume, controlling the application of a reverse voltage to the capacitor deionization filter element, and controlling the reversing valve to be in a second state, so that the wastewater output by the capacitor deionization filter element flows to the wastewater outlet.

[0145] On the other hand, an embodiment of the present invention further provides a non-transitory computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, is implemented to execute the water outlet control method of the water purification equipment provided in the above-mentioned embodiments, the method comprising: obtaining a first TDS value of the water body received by the pre-filter element and the water outlet flow rate of the post-filter element; determining the water outlet volume of the water purification equipment according to the water outlet flow rate and the water outlet time of the post-filter element; determining that the first TDS value is greater than a first preset value, controlling the application of a forward voltage to the capacitor deionization filter element, and controlling the reversing valve to be in a first state, so that the clean water output by the capacitor deionization filter element flows to the post-filter element; determining that the water outlet volume is greater than the preset water volume, controlling the application of a reverse voltage to the capacitor deionization filter element, and controlling the reversing valve to be in a second state, so that the wastewater output by the capacitor deionization filter element flows to the wastewater outlet.

[0146] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Ordinary technicians in this field can understand and implement it without paying creative labor.

[0147] Through the description of the above implementation methods, those skilled in the art can clearly understand that each implementation method can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware. Based on this understanding, the above technical solution is essentially or the part that contributes to the relevant technology can be embodied in the form of a software product, and the computer software product can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc., including a number of instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to execute the methods described in each embodiment or some parts of the embodiment.

[0148] Finally, it should be noted that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. Although the present invention is described in detail with reference to the embodiments, it should be understood by those skilled in the art 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 included in the scope of the claims of the present invention.

Claims

1. A water outlet control method for a water purification device, characterized in that: The water purification device comprises: a pre-filter element (20), a capacitor deionizing filter element (2), a post-filter element (50) and a reversing valve (40); the pre-filter element (20) and the capacitor deionizing filter element (2) are fluidically connected in sequence, and the capacitor deionizing filter element (2) is respectively connected to the post-filter element (50) and the wastewater outlet of the water purification device through the reversing valve (40); the method comprises: Obtaining a first TDS value of the water received by the pre-filter element (20) and an outlet flow rate of the post-filter element (50); Determining the water output of the water purification device according to the water output flow rate and the water output time of the post-filter element (50); Determining that the first TDS value is greater than a first preset value, controlling the application of a forward voltage to the capacitor deionizing filter element (2), and controlling the reversing valve (40) to be in a first state, so that the clean water output by the capacitor deionizing filter element (2) flows to the post-filter element (50); Determining that the water output is greater than a preset water output, controlling the application of a reverse voltage to the capacitor deionization filter element (2), and controlling the reversing valve (40) to be in a second state, so that the wastewater output from 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: In the case where the first TDS value exceeds the first preset value, the method further includes: Obtaining a second TDS value of the water output by the post-filter element (50); Determining that the second TDS value is not lower than a second preset value, controlling the reversing valve (40) to be in a second state so that the water output by the capacitive deionizing filter element (2) flows to the wastewater outlet; Determining that the second TDS value is lower than a second preset value, controlling the reversing valve (40) to be in a first state so that the water output by the capacitive deionizing filter element (2) flows to the post-filter element (50); Wherein, the second TDS value is smaller than the first TDS value.

3. The water outlet control method of the water purification equipment according to claim 2, characterized in that: The method further comprises: determining the water purification capacity of the capacitive deionizing filter element (2) using the following formula: S=1-(K1 / K2); Among them, 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 device further comprises: a flow regulating valve (30), wherein the flow regulating valve (30) is arranged between the capacitor deionizing filter element (2) and the reversing valve (40); after the capacitor deionizing filter element (2) receives a forward voltage, the method further comprises: According to the difference between the water outlet flow rate and the set flow rate, the opening of the flow regulating valve (30) is controlled so that the water outlet flow 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 comprises: obtaining the clean water flow and waste water flow output by the capacitive deionization filter element (2); The opening of the flow regulating valve (30) is controlled according to a wastewater ratio of 1: (1-10), wherein 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 device further comprises a switch valve (10), the switch valve (10) being used to control the water supply system to supply water to the pre-filter element (20); after the capacitive deionization filter element (2) receives a reverse voltage, the method further comprises: obtaining a third TDS value of the water body output from the wastewater outlet; Determining that the difference between the third TDS value and the first TDS value is less than a third preset value, controlling the switch valve (10) to close, controlling the capacitive deionization filter element (2) to stop operating, and controlling 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 device further comprises: a sterilizing element (70) and a water supply port, wherein the sterilizing element (70) is arranged on a pipeline between the post-filter element (50) and the water supply port; after the capacitor deionizing filter element (2) receives a forward voltage, the method further comprises: The sterilizing element (70) is controlled to start operation, so as to sterilize the water outputted from the post-filter element (50).

8. The water outlet control method of a water purification device according to any one of claims 1 to 7, characterized in that: The capacitive deionizing filter element (2) comprises a water outlet pipe (21), a flow guide pipe (23) and an electrode assembly (22); the electrode assembly (22) is wound around the peripheral wall of the water outlet pipe (21); both ends of the electrode assembly (22) along the axial direction of the water outlet pipe (21) are sealed; the outer side of the electrode assembly (22) is used to receive input of raw water, and the inner side of the electrode assembly (22) is used to output clean water or waste water; 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); the second end of the water outlet pipe (21) is closed; the flow guide pipe (23) is inserted into the water outlet pipe (21) to form a water passage gap (201) between the flow guide pipe (23) and the water outlet pipe (21); the peripheral wall of the first end of the flow guide pipe (23) is sealedly connected to the inner wall of the water outlet pipe (21); a second water passage hole (202) is formed between the second end of the flow guide pipe (23) and the second end of the water outlet pipe (21); The first water passage hole (211), the water passage gap (201), the second water passage hole (202), the inner cavity of the flow guide tube (23) and the water outlet (212) are sequentially fluidically connected.

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

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

11. The water outlet control method of the water purification equipment according to claim 9, characterized in that: A plurality of groups of first water holes (211) are provided on the peripheral wall of the water outlet pipe (21) along the circumferential direction, and each group of the first water holes (211) is arranged along the axial direction of the water outlet pipe (21); The number of the electrode sheets (222) is greater than two layers, so that the electrode assembly (22) forms a plurality of water passages (2201); the inner end of the electrode assembly (22) forms a plurality of water outlet ends corresponding to the plurality of water passages (2201), and the plurality of water outlet ends are arranged relative to the plurality of groups of the first water passage holes (211).

12. A water outlet control device for a water purification device, characterized in that: The water purification device comprises: a pre-filter element (20), a capacitor deionizing filter element (2), a post-filter element (50) and a reversing valve (40); the pre-filter element (20) and the capacitor deionizing filter element (2) are fluidically connected in sequence, and the capacitor deionizing filter element (2) is respectively connected to the post-filter element (50) and the wastewater outlet of the water purification device through the reversing valve (40); the device comprises: An acquisition module (151) for acquiring a first TDS value of the water received by the pre-filter element (20) and an outlet flow rate of the post-filter element (50); A determination module (152) for determining the water output of the water purification device according to the water output flow rate and the water output time of the post-filter element (50); A first control module (153) is used to determine that the first TDS value is greater than a first preset value, control the application of a forward voltage to the capacitor deionization filter element (2), and control the reversing valve (40) to be in a first state, so that the clean water output by the capacitor deionization filter element (2) flows to the post-filter element (50); The second control module (154) is used to determine that the water output is greater than a preset water output, control the application of a reverse voltage to the capacitor deionization filter element (2), and control the reversing valve (40) to be in a second state, so that the wastewater output by the capacitor deionization filter element (2) flows to the wastewater outlet.

13. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the water outlet control method of the water purification equipment according to any one of claims 1 to 11 is implemented.

14. A non-transitory computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the water outlet control method of the water purification equipment as described in any one of claims 1 to 11 is implemented.

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