1. A domestic water purification unit, its characterized in that, domestic water purification unit includes:

the single-channel desalination assembly comprises a first water inlet and a first water outlet, when positive voltage is applied, water flowing into the first water inlet is purified, and the treated water flows out through the first water outlet;

the double-channel desalting assembly comprises a second water inlet, a second water outlet and a third water outlet, wherein the second water inlet is connected with the first water outlet, the water flowing in from the second water inlet is purified, the treated pure water flows out from the second water outlet, and the treated concentrated water flows out from the third water outlet;

the pipeline system comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is connected with the first water inlet, the second pipeline is connected with the second water outlet, one end of the third pipeline is connected with the third water outlet, and the other end of the third pipeline is connected with the first water inlet; the concentrated water flowing out of the third water outlet flows into the first water inlet through the third pipeline.

2. The domestic water purification apparatus of claim 1, wherein the flow rate of water flowing into said first water inlet from said first pipeline and the flow rate of water flowing into said first water inlet from said third pipeline are controlled according to a predetermined flow ratio.

3. The domestic water purification apparatus of claim 1, wherein said piping system further comprises a fourth pipe and a waterway switching device, said waterway switching device being disposed between said first water outlet and said second water inlet, said fourth pipe being connected to said first water outlet via said waterway switching device;

when positive voltage is applied to the single-channel desalination assembly and the waterway switching device is tangentially arranged to the second water inlet, purifying the water flowing in through the first water inlet, and enabling the treated water to flow out to the second water inlet through the first water outlet;

when the single-channel desalination assembly is de-energized or reverse voltage is applied and the waterway switching device is switched tangentially to the fourth pipeline, saline in the single-channel desalination assembly is flushed to the fourth pipeline by the water flowing in through the first water inlet.

4. The domestic water purification apparatus of claim 1, wherein said single-channel desalination assembly comprises a physisorption desalination cartridge and/or a chemisorption desalination cartridge.

5. The domestic water purification apparatus of claim 4, wherein said chemisorptive desalination cartridge comprises at least one of an ion exchange resin cartridge, a bipolar membrane electrodeionization cartridge;

the physical adsorption desalination filter element comprises at least one of a capacitance desalination filter element and a membrane capacitance desalination filter element.

6. The domestic water purification apparatus of claim 1, wherein said dual-channel desalination assembly comprises at least one of a reverse osmosis membrane cartridge, a nanofiltration membrane cartridge.

7. The domestic water purification apparatus of claim 1, further comprising a drive assembly coupled to the dual-channel desalination assembly and a power supply assembly coupled to the single-channel desalination assembly.

8. The domestic water purification apparatus of claim 7, further comprising a control module, wherein the control module controls the power supply module to cut off power supply to the single channel desalination module or to apply a reverse voltage to the single channel desalination module when a current time is a preset time.

9. The domestic water purification apparatus of claim 1, wherein said pipe system further comprises a filter assembly disposed on said first pipe and/or a filter assembly disposed on said second pipe.

10. The domestic water purification apparatus of claim 1, wherein said pipe system further comprises a conductivity detection assembly disposed on said first pipe and/or a conductivity detection assembly disposed on said second pipe.

11. The domestic water purification device of any one of claims 1-10, wherein said second pipe is connected to a plurality of water outlet pipes in the direction of water outlet, and at least one of said water outlet pipes is provided with a heating unit.

Background

Along with the progress of society, the living standard of people is improved, and people pay more and more attention to the sanitation of self diet drinking water. At present, tap water is usually treated by a chlorination method, so that water-borne diseases can be effectively prevented, but the tap water contains salt, impurities, residual chlorine and the like, does not have conditions for direct drinking, and needs to be purified before drinking.

In the prior art, a reverse osmosis membrane is often used to purify tap water to prepare pure water which can be directly drunk. The reverse osmosis membrane can effectively prevent substances such as bacteria, viruses, water scales, salt ions and the like and only allows water molecules to pass through, thereby ensuring the safety of water. During the treatment process, substances such as bacteria, viruses, scale, salt ions and the like which do not pass through the reverse osmosis membrane form concentrated water to be discharged. The prior common reverse osmosis membrane generates more concentrated water during purification and is not high in water utilization rate.

Disclosure of Invention

The embodiment of the application provides a domestic purifier, adopts single-flow-channel desalination subassembly and double-flow-channel desalination subassembly to establish ties, and the concentrated water that double-flow-channel desalination subassembly produced when purifying flows into single-flow-channel desalination subassembly, can not discharge waste water when carrying out purification treatment to the water that flows through single-flow-channel desalination subassembly, has improved the utilization ratio of water.

The application provides a domestic purifier, domestic purifier includes:

the single-channel desalination assembly comprises a first water inlet and a first water outlet, when positive voltage is applied, water flowing into the first water inlet is purified, and the treated water flows out through the first water outlet;

the double-channel desalting assembly comprises a second water inlet, a second water outlet and a third water outlet, wherein the second water inlet is connected with the first water outlet, the water flowing in from the second water inlet is purified, the treated pure water flows out from the second water outlet, and the treated concentrated water flows out from the third water outlet;

the pipeline system comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is connected with the first water inlet, the second pipeline is connected with the second water outlet, one end of the third pipeline is connected with the third water outlet, and the other end of the third pipeline is connected with the first water inlet; the concentrated water flowing out of the third water outlet flows into the first water inlet through the third pipeline.

Illustratively, the water flow rate of the first pipeline flowing into the first water inlet and the water flow rate of the third pipeline flowing into the first water inlet are controlled according to a preset flow ratio.

Illustratively, the pipeline system further comprises a fourth pipeline and a waterway switching device, the waterway switching device is arranged between the first water outlet and the second water inlet, and the fourth pipeline is connected to the first water outlet through the waterway switching device;

when positive voltage is applied to the single-channel desalination assembly and the waterway switching device is tangentially arranged to the second water inlet, purifying the water flowing in through the first water inlet, and enabling the treated water to flow out to the second water inlet through the first water outlet;

when the single-channel desalination assembly is de-energized or reverse voltage is applied and the waterway switching device is switched tangentially to the fourth pipeline, saline in the single-channel desalination assembly is flushed to the fourth pipeline by the water flowing in through the first water inlet.

Illustratively, the single-channel desalination assembly comprises a physisorption desalination cartridge and/or a chemisorption desalination cartridge.

Illustratively, the chemisorptive desalination cartridge comprises at least one of an ion exchange resin cartridge, a bipolar membrane electrodeionization cartridge;

the physical adsorption desalination filter element comprises at least one of a capacitance desalination filter element and a membrane capacitance desalination filter element.

Illustratively, the dual-channel desalination assembly comprises at least one of a reverse osmosis membrane filter cartridge, a nanofiltration membrane filter cartridge.

Illustratively, the domestic water purification device further comprises a driving assembly and a power supply assembly, wherein the driving assembly is connected with the double-flow-channel desalination assembly, and the power supply assembly is connected with the single-flow-channel desalination assembly.

Illustratively, the household water purifying device further comprises a control component, and the control component controls the power supply component to cut off the power supply to the single-channel desalting component or apply reverse voltage to the single-channel desalting component when the current time is preset time.

Illustratively, the pipeline system further comprises a filter assembly arranged on the first pipeline and/or a filter assembly arranged on the second pipeline.

Illustratively, the pipeline system further comprises a conductivity detection assembly arranged on the first pipeline and/or a conductivity detection assembly arranged on the second pipeline.

For example, the water outlet direction of the second pipeline is connected with a plurality of water outlet pipelines, and at least one water outlet pipeline is provided with a heating unit.

The application discloses domestic purifier includes: the single-channel desalting component comprises a first water inlet and a first water outlet, the water flowing into the first water inlet is purified when forward voltage is applied, and the treated water flows out through the first water outlet; the double-channel desalting component comprises a second water inlet, a second water outlet and a third water outlet, wherein the second water inlet is connected with the first water outlet, the water flowing out of the first water outlet is purified, the treated pure water flows out through the second water outlet, and the treated concentrated water flows out through the third water outlet; the pipeline system comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is connected with a first water inlet, the second pipeline is connected with a second water outlet, one end of the third pipeline is connected with a third water outlet, the other end of the third pipeline is connected with a first water inlet, concentrated water flowing out of the third water outlet flows into the first water inlet through the third pipeline, and then is purified by the single-channel desalination assembly, so that the concentrated water generated when the double-channel desalination assembly is purified is avoided being wasted, and the water utilization rate is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a household water purifying device according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of an embodiment of a household water purifying apparatus;

FIG. 3 is a schematic diagram of a bipolar membrane electrodeionization cartridge desalination process;

FIG. 4 is a schematic diagram of the bipolar membrane electrodeionization filter regeneration process;

fig. 5 is a schematic view of the connection relationship of the parts in the household water purifying device.

Reference numerals: 100. a single-channel desalination assembly; 110. a first water inlet; 120. a first water outlet; 200. a dual-channel desalination assembly; 210. a second water inlet; 220. a second water outlet; 230. a third water outlet; 300. a piping system; 310. a first pipeline; 320. a second pipeline; 330. a third pipeline; 340. a fourth pipeline; 350. a waterway switching device; 360. a filter assembly; 410. a control component; 420. a power supply assembly;

10. a conductivity detection component; 20. a drive assembly; 30. a flow detection component; 40. a temperature detection assembly;

900. a bipolar membrane electrodeionization filter element; 910. an electrode; 911. a first electrode; 912. a second electrode; 920. bipolar membrane; 921. a cation exchange membrane; 922. an anion exchange membrane.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation. In addition, although the division of the functional blocks is made in the device diagram, in some cases, it may be divided in blocks different from those in the device diagram.

The embodiment of the application provides a household water purifying device which can be a water purifier, such as a table-board type water purifying/drinking machine.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 1 is a schematic structural diagram of the household water purifying device in the embodiment.

Referring to fig. 1, the household water purifying apparatus includes a single-channel desalination module 100, a double-channel desalination module 200, and a pipeline system 300.

As shown in fig. 1, the single channel desalination assembly 100 includes a first water inlet 110 and a first water outlet 120, and when a positive voltage is applied, the water flowing in from the first water inlet 110 is purified, and the treated water flows out through the first water outlet 120.

Double-channel desalination assembly 200 includes second water inlet 210, second water outlet 220 and third water outlet 230, and second water inlet 210 is connected with first water outlet 120, and the water that flows out through first water outlet 120 flows into double-channel desalination assembly 200 from second water inlet 210, and double-channel desalination assembly 200 carries out purification treatment to the water that second water inlet 210 flows in when exerting driving pressure, generates treated pure water and dense water, and treated pure water flows out through second water outlet 220, and treated dense water flows out through third water outlet 230.

Specifically, the pipeline system 300 includes a first pipeline 310, a second pipeline 320, and a third pipeline 330, wherein the first pipeline 310 is connected to the first water inlet 110, and is configured to output unpurified water to the first water inlet 110; the second pipe 320 is connected to the second water outlet 220, and is used for outputting the pure water discharged through the second water outlet 220; one end of the third pipeline 330 is connected to the third water outlet 230, and the other end is connected to the first water inlet 110, and the concentrated water flowing out from the third water outlet 230 flows into the first water inlet 110 through the third pipeline 330, passes through the single-channel desalination module 100 for water purification, and is discharged from the first water outlet 120.

The water produced by the purification of the single channel desalination module 100 is output to the dual-channel desalination module 200, and the water purified by the single channel desalination module 100 is purified again by the dual-channel desalination module 200, thereby further improving the water quality.

In addition, when the single-channel desalination assembly 100 is used for purifying water flowing through, no waste water is generated, and the utilization rate of water is improved. Meanwhile, the concentrated water generated by the double-flow-channel desalination assembly 200 during the water purification treatment also flows back to the single-flow-channel desalination assembly 100, and the purification treatment is performed through the single-flow-channel desalination assembly 100, so that the concentrated water generated by the double-flow-channel desalination assembly 200 during the purification treatment is prevented from being wasted, and the water utilization rate is improved.

In some embodiments, since the two water flows into the first water inlet 110 through the first pipeline 310 and the third pipeline 330, a preset flow ratio of the two water flows can be preset, and the preset flow ratio controls the flow rate of the water flowing into the first water inlet 110 through the first pipeline 310 and the flow rate of the water flowing into the first water inlet 110 through the third pipeline 330.

Illustratively, the value range of the preset flow ratio is 0-100%, and the value range can be flexibly set according to actual conditions.

In some embodiments, as shown in fig. 2, the pipeline system 300 further includes a fourth pipeline 340 and a waterway switch 350, wherein the waterway switch 350 is disposed between the first water outlet 120 and the second water inlet 210, and the fourth pipeline 340 is connected to the first water outlet 120 via the waterway switch 350.

Illustratively, the waterway switching device 350 includes a tangential valve or a plurality of two-way solenoid valve sets, such as three-way valves, etc.

In the process of purifying water in the single-channel desalination module 100, a positive voltage is applied to the single-channel desalination module 100, the waterway switching device 350 is tangentially connected to the second water inlet 210, water flowing in through the first water inlet 110 is purified, and the treated water flows out to the second water inlet 210 through the first water outlet 120.

During the flushing regeneration of the single-channel desalination assembly 100, the single-channel desalination assembly 100 is powered off or a reverse voltage is applied, and the water path switching device 350 is switched tangentially to the fourth pipeline 340, so that the saline substances in the single-channel desalination assembly 100 are flushed from the first water inlet 110 to the fourth pipeline 340.

In some embodiments, the single-channel desalination assembly 100 comprises a physisorption desalination cartridge and/or a chemisorption desalination cartridge. The dual-channel desalination assembly 200 includes at least one of a Reverse Osmosis (RO) filter element, a Nanofiltration (NF) filter element.

Illustratively, the chemisorptive desalination cartridge can include at least one of an ion exchange (IX) resin cartridge, a bipolar membrane (Biopolar, BP) electrodeionization cartridge.

Exemplary, the physisorption desalination filter element may include at least one of a Capacitive Desalination (CDI) filter element, a Membrane Capacitive Desalination (MCDI) filter element.

Specifically, the capacitive desalination filter element, the membrane capacitive desalination filter element, the bipolar membrane electrodeionization filter element and the like can cause the directional migration of cations and anions when being powered on, so as to realize the purification treatment of water, and the filter elements can be called as electrically-driven single-channel desalination filter elements. The reverse osmosis membrane filter core can realize the purification treatment of water when exerting pressure, can be called pressure drive binary channels desalination filter core.

Specifically, as shown in fig. 3 and 4, a schematic diagram of a structure of a bipolar membrane electrodeionization filter cartridge 900 is shown.

As shown in fig. 3 and 4, the bipolar membrane electrodeionization filter cartridge 900 includes one or more pairs of electrodes 910, and at least one bipolar membrane 920 or a plurality of spaced-apart bipolar membranes 920 is disposed between at least one pair of electrodes 910. Wherein, bipolar membrane 920 includes cation exchange membrane 921 and anion exchange membrane 922, and cation exchange membrane 921 and anion exchange membrane 922 set up relatively, compound together. For example, the bipolar membrane 920 can be produced by a hot press molding method, a bonding molding method, a casting molding method, an anion and cation exchange radical method, an electrodeposition molding method, or the like. Specifically, there is no space between the cation exchange membrane 921 and the anion exchange membrane 922 on one bipolar membrane 920, for example, water does not pass between the cation exchange membrane 921 and the anion exchange membrane 922 on the same bipolar membrane 920 when flowing through the bipolar membrane electrodeionization filter cartridge 900.

As shown in fig. 3 and 4, the pair of electrodes 910 includes a first electrode 911 and a second electrode 912, wherein the first electrode 911 is disposed opposite to a cation exchange membrane 921 of the bipolar membrane 920 adjacent to the first electrode 911, and the second electrode 912 is disposed opposite to an anion exchange membrane 922 of the bipolar membrane 920 adjacent to the second electrode 912.

Fig. 3 is a schematic diagram showing the operation principle of the bipolar membrane electrodeionization filter element 900 in the process of purifying water. Here, the potential of the first electrode 911 is higher than that of the second electrode 912, that is, a voltage in a forward direction is applied between the first electrode 911 and the second electrode 912. At this time, anions such as chloride ions in the raw water to be purified move towards the first electrode 911, and replace OH < - > in the anion exchange membrane 922 in the direction of the first electrode 911, and the OH < - > enters the flow channel between the adjacent bipolar membranes 920; meanwhile, cations such as Na + in the raw water move towards the second electrode 912 to replace H + in the cation exchange membrane 921 in the direction of the second electrode 912, and the H + enters the flow channel; h + and OH-are subjected to neutralization reaction in the flow channel to generate water, so that the salt in the raw water is removed, and purified pure water flows out from the tail end of the flow channel.

As shown in fig. 4, when a voltage in the opposite direction is applied between the first electrode 911 and the second electrode 912, so that the potential of the first electrode 911 is lower than that of the second electrode 912, OH "and H + ions are generated on the surfaces of the cation exchange membrane 921 and the anion exchange membrane 922 of the bipolar membrane 920 under the action of an electric field, cations such as Na + inside the cation exchange membrane 921 are replaced by H + ions and move toward the first electrode 911 at a low potential, anions such as chloride ions in the anion exchange membrane 922 are replaced by OH" and move toward the second electrode 912 at a high potential, and the cations such as Na + and the anions such as chloride ions enter the flow channel and can be washed out by water flowing through the bipolar membrane electrodeionization filter 900. Therefore, when the power is off or reverse voltage is applied to the desalting filter cores such as the bipolar membrane electrodeionization filter core 900 and the like, cations such as Na < + >, anions such as chloride ions and the like adsorbed on the bipolar membrane 920 are released, so that salt substances in the desalting filter core can be washed out by water to realize regeneration; water carrying cations such as Na + and anions such as chloride ions can be called concentrated water.

In some embodiments, as shown in fig. 1 and 2, the domestic water purification apparatus may further comprise a drive assembly 20, the drive assembly 20 being connected to the dual-flow desalination assembly 200, disposed between the single-flow desalination assembly 100 and the dual-flow desalination assembly 200, the drive assembly 20 driving water flow to the dual-flow desalination assembly 200. Illustratively, the drive assembly 20 may include a pressure pump.

Illustratively, as shown in fig. 5, the household water purifying apparatus may further include a power supply module 420, wherein the power supply module 420 is connected to the single channel desalination module 100 and applies a forward voltage or a reverse voltage to the single channel desalination module 100. For example, an electrically driven single-channel desalination filter element is connected to supply power to the electrically driven single-channel desalination filter element.

In some embodiments, the voltage at which the power supply assembly 420 supplies power to the electrically driven single-channel desalination cartridge can be adjusted, and the desalination rate of the electrically driven single-channel desalination cartridge changes as the voltage supplied by the power supply assembly 420 is adjusted.

Exemplarily, the running voltage of the electrically-driven single-channel desalination filter element adapted to the water quality can be set according to the difference of the water quality of the using region of the household water purifying device, so that the water purified by the electrically-driven single-channel desalination filter element can meet the requirement. For example, when the quality of the water supplied from the water supply pipe is hard, the power supply voltage of the power supply module 420 may be set high; when the water quality of the tap water pipe supply water is soft, the supply voltage of the power supply module 420 may be set low.

Illustratively, after the single-channel desalination assembly 100 has been in operation for a certain period of time, more salts are adsorbed during the water purification process, and the single-channel desalination assembly 100 needs to be regenerated.

In some embodiments, the reverse voltage may be applied or de-energized to the single channel desalination assembly 100 to enable the saline in the single channel desalination assembly 100 to be flushed from the water flowing from the first water outlet 120 of the single channel desalination assembly 100 to the fourth line 340.

In other embodiments, the single-channel desalination assembly 100 and the dual-channel desalination assembly 200 can be removably received within the interior of a domestic water purification apparatus, such that the single-channel desalination assembly 100 and the dual-channel desalination assembly 200 can be removed from the domestic water purification apparatus for flushing when needed, thereby regenerating the filter elements of the single-channel desalination assembly 100 and the dual-channel desalination assembly 200.

In some embodiments, as shown in fig. 5, the household water purifying apparatus further comprises a control module 410, the control module 410 is connected to the power supply module 420 and the waterway switching device 350, and the power supply module 420 is connected to the single-channel desalination module 100. The control component 410 may include, for example, a single chip microcomputer or the like.

Illustratively, the control component 410 may include input devices, which may include, for example, buttons, knobs, touch screens, microphones, and the like.

Illustratively, when the control module 410 detects a water output control operation through the input device, such as a user pressing a water output button, or sends out a voice including a water output command, the power supply module 420 is controlled to apply a forward voltage to the single-channel desalination module 100 according to the detected water output control operation, and the water path switching device 350 is controlled to tangentially connect to the second water inlet 210, so that the purified water from the single-channel desalination module 100 can be output to the second water inlet 210 and purified again by the double-channel desalination module 200.

In some embodiments, when the control module 410 switches to the regeneration mode during a period from a current time being a preset time, such as 10 pm to half 10 pm, the control module 410 controls the power supply module 420 to cut off power to the single channel desalination module 100 or to apply a reverse voltage to the single channel desalination module 100, and controls the waterway switching device 350 to tangentially connect to the fourth pipeline 340. Such that salt ions attached to the single-channel desalination assembly 100 enter the water and exit the single-channel desalination assembly 100 with the water.

In some embodiments, control assembly 410 is coupled to drive assembly 20. The control component 410 may include, for example, a single chip microcomputer or the like. Control assembly 410 controls drive assembly 20 to apply pressure to dual-channel desalination assembly 200, and dual-channel desalination assembly 200 purifies the water flowing in through second water inlet 210.

In some embodiments, the conduit system 300 further includes a pressure relief valve disposed on the first conduit 310.

For example, the pressure reducing valve comprises a plurality of pressure reducing valves which are connected in series. For example, two pressure reducing valves are connected in series, the pressure reducing valve in series is 2.5kg, the pressure reducing valve in series is 1.5kg, the initial water pressure P0 is reduced to P1 by the pressure reducing valve in series, and the P1 is reduced to the target water pressure Pn by the pressure reducing valve in series.

In some embodiments, as shown in fig. 1 and 2, conduit system 300 further includes a filter assembly 360 disposed on first conduit 310 and/or a filter assembly 360 disposed on second conduit 320.

Illustratively, the filter assembly 360 may include a PP cotton filter element and/or an activated carbon filter element. The filter assembly 360 in the first line 310 is capable of purifying the water entering the single-channel desalination assembly 100 to a certain extent, for example, to remove the water that may contain particulate impurities, residual chlorine, etc., thereby reducing the workload and consumption of the single-channel desalination assembly 100 and prolonging the regeneration cycle and service life thereof. The filtering assembly 360 on the second pipe 320 can further improve the quality of the pure water output from the household water purifying apparatus.

In some embodiments, the outlet direction of the second pipe 320 may be further connected to a heating unit, for example, a heat exchanger. The heating unit may heat the water flowing out of the second pipe 320 to provide the user with hot water of a desired temperature.

For example, the water outlet direction of the second pipe 320 is connected to a plurality of water outlet pipes, and at least one of the water outlet pipes is provided with a heating unit.

In some embodiments, as shown in fig. 1 and 2, a temperature detection assembly 40 may also be disposed on the first pipeline 310, and the temperature detection assembly 40 is used for detecting the temperature of the water flowing to the single channel desalination assembly 100.

In some embodiments, as shown in fig. 1 and 2, the piping system 300 further includes a conductivity detection assembly 10 disposed on the first piping 310 and/or a conductivity detection assembly 10 disposed on the second piping 320. The water quality of the water at the corresponding position can be detected by the conductivity detection assembly 10. For example, the TDS value is a water quality test indicator specifically set for purified water, and represents the total soluble solids content of water. The TDS value can reflect the water quality to a certain degree, and generally, the lower the TDS value is, the less soluble salts such as heavy metal ions in the water are, and the purer the water quality is.

For example, the conductivity detection module 10 may be disposed on the first water outlet side of the single-channel desalination module 100 and the second water outlet side of the dual-channel desalination module 200, respectively, and the conductivity of the water from the single-channel desalination module 100 and the conductivity of the water from the dual-channel desalination module 200 may be detected by the conductivity detection module 10, so as to determine whether the water purification effect of the single-channel desalination module 100 and the dual-channel desalination module 200 can meet the requirement.

Specifically, when the conductivity data detected by the conductivity detection module 10 on the first outlet side of the single channel desalination module 100 is not less than the target conductivity, it can be determined that the single channel desalination module 100 requires regeneration processing. When the conductivity data detected by the conductivity detection assembly 10 on the second outlet side of the dual-channel desalination assembly 200 is not less than the target conductivity, it can be determined that the dual-channel desalination assembly 200 requires regeneration processing.

For example, when the duration of time during which the conductivity data detected by the conductivity detection assembly 10 on the first outlet side of the single-channel desalination assembly 100 or the conductivity detection assembly 10 on the second outlet side of the dual-channel desalination assembly 200 is not less than the target conductivity exceeds a preset time period, such as 10 hours, it can be determined that the regeneration process is required for the single-channel desalination assembly 100 or the dual-channel desalination assembly 200.

In some embodiments, as shown in fig. 5, the control module 410 is connected to the conductivity detection module 10, the power module 420 and the waterway switching device 350, and the power module 420 is connected to the single channel desalination module 100. The control component 410 may include, for example, a single chip microcomputer or the like.

Illustratively, the control module 410 controls the power supply module 420 to cut off power supply to the single channel desalination module 100 or to apply a reverse voltage to the single channel desalination module 100, and controls the waterway switching device 350 to tangentially connect to the fourth pipeline 340 when the conductivity data detected by the conductivity detection module 10 at the first outlet side of the single channel desalination module 100 is not less than the target conductivity. Such that the salt ions attached to the single-channel desalination assembly 100 enter the water and exit the single-channel desalination assembly 100 with the water, and the flushed wastewater exits the first water outlet 120 of the single-channel desalination assembly 100 to the fourth pipeline 340.

In some embodiments, as shown in fig. 1 and 2, a conductivity detection assembly 10 may be further disposed on the first pipeline 310, and the conductivity detection assembly 10 may be capable of detecting the quality of the water to be purified.

Illustratively, the conductivity detection module 10 is coupled to the control module 410. The control module 410 can control the power supply module 420 to adjust the power supply voltage to the single channel desalination module 100 based on the conductivity data detected by the conductivity detection module 10 in the first conduit 310. For example, the greater the conductivity data detected by the conductivity detection assembly 10 on the first conduit 310, the greater the voltage of the forward voltage applied by the power supply assembly 420 to the single channel desalination assembly 100 to enhance the effectiveness of the purification process.

In some embodiments, as shown in fig. 1 and 2, a flow sensing assembly 30 may also be provided on the first pipeline 310 and/or the second pipeline 320. Optionally, the flow sensing assembly 30 is connected to the control assembly 410.

In some embodiments, the conductivity detection assembly 10 is disposed on the fourth conduit 340. When the single-channel desalination assembly 100 is de-energized or a reverse voltage is applied to the single-channel desalination assembly 100, the control assembly 410 determines the regeneration effectiveness of the single-channel desalination assembly 100 based on the conductivity data detected by the conductivity detection assembly 10 on the fourth line 340.

Illustratively, water after flushing the single channel desalination assembly 100 can be discharged through the fourth line 340, during which the conductivity detection assembly 10 on the fourth line 340 can detect conductivity data of the water after flushing the single channel desalination assembly 100. When the conductivity data is less than the predetermined conductivity, it can be determined that the saline material in the single channel desalination assembly 100 is flushed, the regeneration mode can be terminated, such as resuming the application of the forward voltage to the single channel desalination assembly 100, and the waterway switching device 350 can be controlled to switch tangentially to the second water inlet 210.

In some embodiments, the household water purifying apparatus further includes a raw water tank capable of storing water, and one end of the first pipe 310 is connected to the raw water tank, and the other end is connected to the first water inlet 110.

Illustratively, the raw water tank comprises a transparent shell or a transparent window is arranged on the shell, so that a user can conveniently check the water quality, the water level and the like in the raw water tank.

For example, the raw water tank may further include a water injection port through which water to be purified may be added into the raw water tank. For example, the water filling port is connected with a tap water pipe. In an exemplary embodiment, the raw water tank is further provided with a liquid level meter, and when the liquid level in the raw water tank drops to a set value, the raw water tank can control a valve of the tap water pipe to open to feed water to a water feeding port of the raw water tank.

For example, the water stored in the raw water tank may flow into the single-channel desalination assembly 100 through the first pipe 310, and when the single-channel desalination assembly 100 applies a positive voltage, the flowing water is purified, and the purified water is output to the double-channel desalination assembly 200 through the first water outlet 120.

It is understood that one end of the first pipeline 310 may be directly connected to the tap water pipe, and the other end is connected to the first water inlet 110.

The domestic water purifying device provided by the embodiment of the specification comprises a single-channel desalting component, a double-channel desalting component and a pipeline system, wherein the single-channel desalting component comprises a first water inlet and a first water outlet, the water flowing into the first water inlet is purified when forward voltage is applied, and the treated water flows out through the first water outlet; the double-channel desalting component comprises a second water inlet, a second water outlet and a third water outlet, wherein the second water inlet is connected with the first water outlet, the water flowing out of the first water outlet is purified, the treated pure water flows out through the second water outlet, and the treated concentrated water flows out through the third water outlet; the pipeline system comprises a first pipeline, a second pipeline and a third pipeline, the first pipeline is connected with a first water inlet, the second pipeline is connected with a second water outlet, one end of the third pipeline is connected with a third water outlet, the other end of the third pipeline is connected with a first water inlet, concentrated water flowing out of the third water outlet flows into the first water inlet through the third pipeline, and then is purified by the single-channel desalination assembly, so that the concentrated water generated when the double-channel desalination assembly is purified is avoided being wasted, and the water utilization rate is improved.

In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the embodiments of the present invention.

Furthermore, the terms "first", "first" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "first" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In embodiments of the present invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the first feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, a first feature being "on," "over," and "above" a first feature includes the first feature being directly above and obliquely above the first feature, or simply means that the first feature is higher in level than the first feature. A first feature being "under," "below," and "beneath" a first feature includes the first feature being directly under and obliquely below the first feature, or simply meaning that the first feature is at a lesser elevation than the first feature.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.