CN113493268A

CN113493268A - Household water purifying device

Info

Publication number: CN113493268A
Application number: CN202010252457.7A
Authority: CN
Inventors: 陈小平; 吕苏; 晏博; 董红晨; 陈文彬; 黄剑波; 郝楠
Original assignee: Foshan Viomi Electrical Technology Co Ltd
Current assignee: Foshan Viomi Electrical Technology Co Ltd
Priority date: 2020-04-01
Filing date: 2020-04-01
Publication date: 2021-10-12

Abstract

The application relates to the field of household water purification, and particularly discloses a household water purification device which comprises a single-channel desalination assembly, wherein the single-channel desalination assembly is used for purifying inflow water when forward voltage is applied, a first pipeline is used for delivering water to the single-channel desalination assembly, and a second pipeline is connected with a water outlet of the single-channel desalination assembly; the second pipeline is provided with a valve assembly, the first pipeline is provided with a conductivity detection assembly, the control assembly detects the water quality of the inlet water of the single-channel desalination assembly, the regeneration period or the regeneration frequency is determined according to the water quality of the inlet water, and the regeneration working mode is entered according to the regeneration period or the regeneration frequency; in the regeneration working mode, the control component cuts off the power of the single-channel desalination component or applies reverse voltage to the single-channel desalination component, and the control valve component closes a channel between the water outlet and the second pipeline, so that the water flowing into the single-channel desalination component carries the salt substances to be discharged from a concentrated water outlet of the single-channel desalination component. The utilization ratio of water is high during water purification, and can wash regeneration to single flow path desalination subassembly.

Description

Household water purifying device

Technical Field

The utility model relates to a domestic water purification technical field especially relates to a domestic purifier.

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 the desalination subassembly of single current way to carry out the water purification, and the water that gets into single current way desalination subassembly can be followed the delivery port and discharged, obtains purification treatment simultaneously, does not produce waste water at this in-process, has improved the utilization ratio of water.

The application provides a domestic purifier, include:

a control component;

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 pipeline system comprises a first pipeline and a second pipeline; the first pipeline is connected with the first water inlet and used for supplying water to the first water inlet; the second pipeline is connected with the first water outlet;

the second pipeline is provided with a first valve component, the single-channel desalination component further comprises a concentrated water outlet, and the first pipeline is provided with a first conductivity detection component; the control component detects the water quality of the inlet water of the single-channel desalination component through the first conductivity detection component, determines a regeneration period or a regeneration frequency according to the water quality of the inlet water, and enters a regeneration working mode according to the regeneration period or the regeneration frequency;

in the regeneration working mode, the control component cuts off the power of the single-channel desalination component or applies reverse voltage to the single-channel desalination component, and controls the first valve component to close a channel between the first water outlet and the second pipeline, so that the water flowing into the single-channel desalination component carries salt substances to be discharged from a concentrated water outlet.

The application discloses a household water purifying device, which comprises a control component, a single-channel desalting component and a pipeline system; the single-channel desalination assembly comprises a first water inlet and a first water outlet, 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 pipeline system comprises a first pipeline and a second pipeline; the first pipeline is connected with the first water inlet and used for supplying water to the first water inlet; the second pipeline is connected with the first water outlet; specifically, the second pipeline is provided with a first valve component, the single-channel desalination component also comprises a concentrated water outlet, and the first pipeline is provided with a first conductivity detection component; the control component detects the water quality of the inlet water of the single-channel desalination component through the first conductivity detection component, determines the regeneration period or the regeneration frequency according to the water quality of the inlet water, and enters the regeneration working mode according to the regeneration period or the regeneration frequency; in the regeneration working mode, the control component cuts off the power of the single-channel desalination component or applies reverse voltage to the single-channel desalination component, and controls the first valve component to close the channel between the first water outlet and the second pipeline, so that the water flowing into the single-channel desalination component carries salt substances to be discharged from the concentrated water outlet. When the single-channel desalting component is used for purifying water flowing through, no waste water is discharged, so that the utilization rate of water is improved; but also can wash regeneration to single flow path desalination subassembly when needing, guarantee better water purification effect.

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 diagram of a bipolar membrane electrodeionization cartridge desalination process;

FIG. 3 is a schematic diagram of the bipolar membrane electrodeionization filter regeneration process;

FIG. 4 is a schematic view showing the connection relationship of the parts in the household water purifying apparatus;

FIG. 5 is a schematic diagram of an embodiment of a household water purifying apparatus;

fig. 6 is a schematic structural diagram of another embodiment of the household water purifying device.

Reference numerals: 100. a single-channel desalination assembly; 110. a first water inlet; 120. a first water outlet; 130. a concentrated water outlet; 140. a water outlet valve;

200. a piping system; 210. a first pipeline; 211. a water inlet electromagnetic valve; 212. a heating assembly; 213. a pressure reducing valve; 214. a first filter assembly; 220. a second pipeline; 221. a second filter assembly; 230. a first valve assembly; 240. a second valve component; 250. a third pipeline; 251. a scale inhibiting component; 252. a one-way valve; 260. a water outlet pipeline; 261. a heating unit;

300. a control component; 400. a power supply assembly; 10. a first conductivity detection assembly; 20. a second conductivity detection component; 30. a flow sensor; 40. a third conductivity detection assembly; 50. a temperature sensor;

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-top water purifying/drinking machine, a kitchen-below water purifying/drinking machine and the like.

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 purification apparatus includes a single-channel desalination module 100 and a pipeline system 200.

Therein, as shown in FIG. 1, the single channel desalination assembly 100 includes a first water inlet 110 and a first water outlet 120. The single channel desalination module 100 purifies water flowing in from the first water inlet 110 when a forward voltage is applied, and the treated water flows out through the first water outlet 120.

It will be appreciated that the single-channel desalination assembly 100 uses only one water inlet and one water outlet for the purification of water flowing therethrough, and thus may be referred to as a single-channel desalination assembly.

The single channel desalination module 100 may not discharge wastewater when purifying water flowing therethrough. Through adopting the desalination subassembly of single current way to carry out the water purification, the water that gets into single current way desalination subassembly 100 can be followed the delivery port and discharged, obtains purification treatment simultaneously, does not produce waste water in this process, has improved the utilization ratio of water.

In some embodiments, the single channel desalination assembly 100 can, of course, also include other water inlets and/or outlets. For example, when the single-channel desalination assembly 100 is flushed and regenerated, the generated wastewater can be discharged through the water outlet. When the single-channel desalination assembly 100 is purifying water flowing through, the water inlets and/or outlets other than the first water inlet 110 and the first water outlet 120 can be closed, thereby forming a single-channel structure.

In some embodiments, the single-channel desalination assembly 100 comprises a physisorption desalination cartridge and/or a chemisorption desalination cartridge.

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 electrified, so that the water purification treatment is realized, and the filter elements can be called as electrically-driven single-channel desalination filter elements.

Specifically, as shown in fig. 2 and 3, a schematic diagram of a structure of a bipolar membrane electrodeionization filter cartridge 900 is shown.

As shown in fig. 2 and 3, 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. 2 and 3, 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. 2 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.

Specifically, as shown in fig. 1, the piping system 200 includes a first piping 210 and a second piping 220.

Wherein the first pipe 210 is connected to the first water inlet 110 for feeding water to the first water inlet 110.

In some embodiments, first conduit 210 may be connected at one end directly to a tap water line and at the other end to first water inlet 110 of single channel desalination assembly 100.

In some embodiments, the household water purification apparatus further comprises a raw water tank capable of storing water, and one end of the first pipeline 210 is connected to the raw water tank, and the other end is connected to the first water inlet 110 of the single channel desalination assembly 100.

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.

Illustratively, a drive assembly may be disposed in first conduit 210, and may, for example, drive water from the raw water tank to single-channel desalination assembly 100.

Illustratively, the drive assembly may comprise a self-priming pump.

Specifically, the second pipeline 220 is connected to the first water outlet 120, and is used for outputting the pure water obtained after the purification treatment of the single-channel desalination assembly 100.

For example, the water stored in the raw water tank may flow into the single channel desalination module 100 through the first pipe 210, and when the single channel desalination module 100 applies a positive voltage, the flowing water is purified, and the purified water is output through the second pipe 220.

Specifically, as shown in fig. 1, the second pipeline 220 is provided with a first valve assembly 230.

Illustratively, when the single-channel desalination assembly 100 applies a forward voltage to purify the water flowing in from the first water inlet 110, the first valve assembly 230 opens the channel between the first water outlet 120 and the second pipeline 220, so that purified pure water can be outputted through the second pipeline 220.

Specifically, as shown in FIG. 1, the single-channel desalination assembly 100 further comprises a concentrate outlet 130.

Illustratively, the concentrate outlet 130 can be disposed on the housing of the single channel desalination assembly 100.

Illustratively, the concentrate outlet 130 may also be disposed at the first water outlet 120.

It will be appreciated that when the first valve assembly 230 closes the passage between the first water outlet 120 and the second conduit 220, water entering the single-channel desalination assembly 100 can exit through the concentrate outlet 130.

For example, the first valve assembly 230 may include a plurality of two-way valves, such as two-way valves that block the communication between the first water outlet 120 and the second pipeline 220.

Specifically, as shown in fig. 4, the household water purifying device includes a control component 300, and the control component 300 includes, for example, a single chip microcomputer.

As shown in fig. 1 and 4, a first conductivity detection assembly 10 is disposed on the first pipeline 210, and the control assembly 300 is connected to the first conductivity detection assembly 10.

Illustratively, the control module 300 is capable of detecting the quality of the incoming water from the single channel desalination assembly 100 via the first conductivity detection module 10, i.e., the quality of the incoming water requiring purification treatment by the single channel desalination assembly 100, such as the conductivity value of the incoming water from the single channel desalination assembly 100.

The conductivity (TDS) value is a water quality detection indicator specifically set for purified water, and represents the total soluble solids content in 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.

Illustratively, as shown in fig. 4, the household water purification device may further include a power supply assembly 400, and the power supply assembly 400 is connected to the electrically driven single-channel desalination filter element to supply power to the electrically driven single-channel desalination filter element.

In some embodiments, the voltage at which the power supply assembly 400 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 400 is adjusted.

For example, the operation voltage of the electrically driven single-channel desalination filter element adapted to the water quality can be set according to the water quality of the water fed into the single-channel desalination assembly 100 detected by the first conductivity detection assembly 10, so that the water purified by the electrically driven single-channel desalination filter element can meet the requirement. For example, when the quality of water supplied from a tap water pipe is hard, the power supply voltage of the power supply module 400 may be set high; when the water quality of the water supplied from the water supply pipe is soft, the power supply voltage of the power supply module 400 may be set low.

For example, the control assembly 300 can control the power supply assembly 400 to adjust the power supply voltage to the single channel desalination assembly 100 based on the conductivity data detected by the first conductivity detection assembly 10. For example, the greater the conductivity data detected by the first conductivity detection assembly 10, the greater the voltage of the forward voltage applied by the power supply assembly 400 to the single channel desalination assembly 100 to enhance the effectiveness of the decontamination process.

In some embodiments, the single-channel desalination assembly 100 adsorbs more salts after a period of time for water purification, and the single-channel desalination assembly 100 can be regenerated to ensure the desalination and water purification effects of the single-channel desalination assembly 100.

Illustratively, the single-channel desalination assembly 100 is regenerated when the current time is a predetermined time, such as 7 am.

Illustratively, the single channel desalination assembly 100 is regenerated when the current time is a preset value away from the last regeneration.

For example, the control module 300 may detect the quality of the incoming water of the single channel desalination module 100 through the first conductivity detection module 10, determine a regeneration period or a regeneration frequency according to the quality of the incoming water, and enter a regeneration operation mode according to the determined regeneration period or regeneration frequency to perform a regeneration process on the single channel desalination module 100 to ensure the desalination and purification effect of the single channel desalination module 100.

Illustratively, the higher the conductivity of the incoming water from the single-channel desalination assembly 100, the harder the water quality in the area where the current seasonal domestic water purification device is used, and the more salt species that the single-channel desalination assembly 100 needs to adsorb when an equivalent amount of water is purified.

Illustratively, the shift in the regeneration cycle or the shift in the regeneration frequency may be determined based on the conductivity of the incoming water to the single-channel desalination assembly 100.

Illustratively, if the conductivity of the single channel desalination assembly 100 feed water is less than 200, then the determined regeneration frequency is less; if the conductivity of the single channel desalination assembly 100 inlet water is at 200-; if the conductivity of the single channel desalination assembly 100 feed water is greater than 500, the determined regeneration frequency is greater.

For example, if the conductivity of the single channel desalination assembly 100 feed water is less than 200, the regeneration frequency is determined to be once every three days; if the conductivity of the inlet water of the single-channel desalination assembly 100 is 200-500, the determined regeneration frequency is once every two days; if the conductivity of the single channel desalination assembly 100 feed water is greater than 500, the regeneration frequency is determined to be once per day.

In some embodiments, as shown in fig. 4 and 5, a flow sensor 30 is disposed on the first pipe 210 or the second pipe 220, and the control assembly 300 is connected to the flow sensor 30.

Illustratively, the flow sensor 30 is disposed on the second conduit 220.

Specifically, the control module 300 enters the regeneration mode of operation based on the flow data from the flow sensor 30 and the regeneration period or frequency.

Illustratively, if the conductivity of the single channel desalination assembly 100 feed water is less than 200, then the determined regeneration frequency is one regeneration for each 10 liters increase in flow data; if the conductivity of the single channel desalination assembly 100 inlet water is at 200-; if the conductivity of the single channel desalination assembly 100 inlet water is greater than 500, then the regeneration frequency is determined to be one regeneration for each 3-liter increase in flow data. Thereby being suitable for different water consumption of users and carrying out regeneration treatment on the single-channel desalination assembly 100 in time.

For example, the flow data may be zeroed at the completion of each regeneration, and the regeneration operation mode may be entered when the flow data is increased to a flow corresponding to the regeneration frequency.

In some embodiments, when the single-channel desalination assembly 100 is being regenerated, such as when the control assembly 300 is in the regeneration mode of operation, the control assembly 300 powers down or applies a reverse voltage to the single-channel desalination assembly 100, and controls the first valve assembly 230 to close the channel between the first water outlet 120 and the second pipeline 220, so that the water flowing into the single-channel desalination assembly 100 carries the salt-like substances out of the concentrated water outlet 130.

For example, the control assembly 300 may control the power supply assembly 400 to apply a voltage in a forward direction, a voltage in a reverse direction, or to de-energize the single channel desalination assembly 100; the magnitude of the voltage output by the power supply assembly 400 to the single channel desalination assembly 100 can also be controlled.

In some embodiments, as shown in fig. 3, when a voltage is applied between the first electrode 911 and the second electrode 912 in opposite directions, 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 towards 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 towards the second electrode 912 at a high potential, and anions such as Na + cations and 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.

By de-energizing or applying a reverse voltage to the single channel desalination assembly 100, the saline in the single channel desalination assembly 100 can be released and washed out with the water flowing through the single channel desalination assembly 100.

Specifically, when the first valve assembly 230 closes the passage between the first water outlet 120 and the second pipeline 220, the water entering the single-channel desalination assembly 100 can carry the salt-like substances out of the concentrated water outlet 130.

In some embodiments, as shown in fig. 5, a second conductivity detection module 20 may be disposed on the concentrated water outlet 130, and the second conductivity detection module 20 may be capable of detecting the quality of the concentrated water discharged from the concentrated water outlet 130.

Illustratively, the second conductivity detection module 20 is coupled to the control module 300. The control assembly 300 can control the power supply assembly 400 to adjust the power supply voltage to the single channel desalination assembly 100 based on the conductivity data detected by the second conductivity detection assembly 20. For example, the greater the conductivity data detected by the second conductivity detection assembly 20, the greater the voltage of the reverse voltage applied by the power supply assembly 400 to the single channel desalination assembly 100 to increase the efficiency of regeneration.

For example, when the conductivity data detected by the second conductivity detection assembly 20 decreases to a regeneration target value, it can be determined that the salt species adsorbed in the single channel desalination assembly 100 is flushed out, and the desalination regeneration can be terminated.

In some embodiments, as shown in fig. 5, the second valve assembly 240 is disposed on the first pipeline 210, the first valve assembly 230 is disposed on the second pipeline 220, and the pipeline system 200 further includes a third pipeline 250, one end of the third pipeline 250 is connected to the second valve assembly 240, and the other end is connected to the first valve assembly 230.

As shown in fig. 4, the control assembly 300 connects the first valve assembly 230 and the second valve assembly 240.

Illustratively, the second valve assembly 240 may comprise a three-way valve having three ports that may be connected to the water inlet side of the first conduit 210, the first water inlet 110 of the single channel desalination assembly 100, and the third conduit 250, respectively. The three-way valve may switch the first line 210 to communicate with the single channel desalination assembly 100 or switch the first line 210 to communicate with the third line 250. It is understood that second valve assembly 240 may of course also comprise a plurality of two-way valves, and may also be capable of switching first conduit 210 into communication with single channel desalination assembly 100, or switching first conduit 210 into communication with third conduit 250.

Illustratively, the first valve assembly 230 may comprise a three-way valve, three ports of which may be connected to the water outlet side of the first water outlet 120, the third line 250, and the second line 220 of the single channel desalination assembly 100, respectively. The three-way valve can switch the first water outlet 120 of the single channel desalination assembly 100 to communicate with the second pipeline 220 so that the purified water can be output through the second pipeline 220, and the three-way valve can switch the third pipeline 250 to communicate with the first water outlet 120 of the single channel desalination assembly 100 so that the water in the third pipeline 250 can enter the single channel desalination assembly 100 through the first water outlet 120.

Illustratively, the first valve assembly 230 may also comprise a plurality of two-way valves, such as one two-way valve to block the communication between the first water outlet 120 and the second pipeline 220, so that the water in the third pipeline 250 can enter the single-channel desalination assembly 100 through the first water outlet 120.

Illustratively, when the single-channel desalination assembly 100 is applied with a positive voltage, the second valve assembly 240 switches the first pipeline 210 to communicate with the single-channel desalination assembly 100, the first valve assembly 230 can switch the first water outlet 120 and the second pipeline 220 of the single-channel desalination assembly 100 to communicate, and simultaneously the second valve assembly 240 and/or the first valve assembly 230 blocks the third pipeline 250, so that the water in the first pipeline 210 flows out of the second pipeline 220 after being purified by the single-channel desalination assembly 100, which is convenient for users to use pure water.

Illustratively, the control assembly 300 may include input devices, which may include, for example, buttons, knobs, touch screens, microphones, and the like.

Illustratively, when the control module 300 detects a water output control operation through an input device, such as a user pressing a water output button, or sends a voice including a water output command, the power supply module 400 is controlled to apply a forward voltage to the single channel desalination module 100, and the second valve module 240 is controlled to switch the first pipeline 210 to communicate with the single channel desalination module 100, the first valve assembly 230 can switch the first water outlet 120 of the single channel desalination module 100 to communicate with the second pipeline 220, and the second valve assembly 240 and/or the first valve assembly 230 block the third pipeline 250, so that the water in the first pipeline 210 flows out of the second pipeline 220 after being purified by the single channel desalination module 100, thereby facilitating the user to use pure water.

In some embodiments, as shown in fig. 4 and 5, a third conductivity detection assembly 40 is disposed on the second pipeline 220, and the control assembly 300 is connected to the third conductivity detection assembly 40, so that the conductivity data of the water flowing out from the second pipeline 220 can be detected by the third conductivity detection assembly 40.

Illustratively, the control assembly 300 is capable of detecting the quality of the water purified by the single channel desalination assembly 100, such as the conductivity (TDS) value of the effluent of the single channel desalination assembly 100, via the third conductivity detection assembly 40.

Illustratively, it can be determined whether the water purification effect of the single-channel desalination assembly 100 can meet the requirement by detecting the conductivity of the effluent at the effluent side of the single-channel desalination assembly 100.

Specifically, when the conductivity data detected by the third conductivity detection module 40 is not less than the target conductivity, it can be determined that the single-channel desalination module 100 adsorbs more salts in the water purification process, and the single-channel desalination module 100 needs to be regenerated.

For example, when the duration of the conductivity data detected by the third conductivity detection assembly 40 is not less than the target conductivity for more than a predetermined period of time, such as 10 hours, it can be determined that the single channel desalination assembly 100 requires regeneration.

Specifically, the target conductivity may be stored in the memory of the control component 300 in advance, or the control component 300 may determine the target conductivity according to a setting operation of a user. When the conductivity data of the water exiting the second conduit 220 reaches the target conductivity, it can be determined that the water quality meets the requirements, such as may be used in a dishwasher, a washing machine, and/or may be consumed directly.

In some embodiments, the control assembly 300 may determine the cumulative workload of the single channel desalination assembly 100 based on the detection data of the first conductivity detection assembly 10, the third conductivity detection assembly 40, and the flow sensor 30.

Illustratively, the control assembly 300 is capable of determining a cumulative workload, such as a consumption value, of the single channel desalination assembly 100 based on the conductivity data detected by the first conductivity detection assembly 10, the conductivity data detected by the third conductivity detection assembly 40, and the flow data detected by the flow sensor 30. For example, the desalination throughput of the single channel desalination assembly 100 can be determined based on conductivity data of the water flowing into the single channel desalination assembly 100 and conductivity data of the water flowing out of the single channel desalination assembly 100, and as the flow rate of the water being processed by the single channel desalination assembly 100 accumulates, the total amount of adsorbed salt species in the single channel desalination assembly 100 can be determined, which can represent the cumulative throughput of the single channel desalination assembly 100.

For example, the control module 300 may determine that regeneration of the single-channel desalination module 100 is required when the accumulated workload reaches the target workload threshold and may enter the regeneration mode of operation.

For example, when the accumulated workload reaches the target workload threshold, it may be determined that the single-channel desalination assembly 100 adsorbs more salts in the water purification process, and the single-channel desalination assembly 100 needs to be regenerated.

For example, when the salt absorption capacity of the single-channel desalination assembly 100 is Q, the depletion threshold can be determined to be 0.75Q; when the cumulative consumption value of the single-channel desalination assembly 100 reaches the consumption threshold, the regeneration operation mode is switched to regenerate the single-channel desalination assembly 100 to restore the salt absorption capacity of the single-channel desalination assembly 100.

Specifically, in the regeneration mode, when the single-channel desalination assembly 100 is de-energized or a voltage in the opposite direction is applied, the second valve assembly 240 and the first valve assembly 230 are actuated, such that the water flowing in the first pipeline 210 flows into the single-channel desalination assembly 100 through the third pipeline 250 and the first water outlet 120 to flush the single-channel desalination assembly 100, and the generated concentrated water flows out through the concentrated water outlet 130.

Illustratively, when regenerating the single-channel desalination assembly 100, such as when entering a regeneration mode of operation according to a regeneration cycle or frequency, or when the cumulative workload reaches a target workload threshold, the control assembly 300 powers down or applies a voltage in the opposite direction to the single-channel desalination assembly 100, controls the first valve assembly 230 to close the channel between the first water outlet 120 and the second pipeline 220, and controls the second valve assembly 240 to close the channel between the first pipeline 210 and the first water inlet 110 and open the channel between the first pipeline 210 and the third pipeline 250, such that the water in the first pipeline 210 flows into the single-channel desalination assembly 100 through the third pipeline 250, and the water flowing into the single-channel desalination assembly 100 can carry the saline substances out through the concentrated water outlet 130.

Illustratively, as shown in fig. 5, the concentrate outlet 130 is connected to an outlet valve 140, and as shown in fig. 4, the outlet valve 140 is connected to the control module 300. When the single-channel desalination module 100 is de-energized or a voltage in the opposite direction is applied, the control module 300 can control the outlet valve 140 to open so that concentrate can flow out through the concentrate outlet 130.

Illustratively, when the single channel desalination assembly 100 is de-energized or a voltage is applied in the opposite direction, the second valve assembly 240 closes the passage between the first conduit 210 and the first water inlet 110, opens the passage between the first conduit 210 and the third conduit 250, and the first valve assembly 230 closes the passage between the first water outlet 120 and the second conduit 220.

Specifically, in the regeneration operation mode, the control module 300 controls the power supply module 400 to cut off power to the single channel desalination module 100 or apply a voltage in the opposite direction, controls the second valve assembly 240 to switch the first pipeline 210 to communicate with the third pipeline 250 and block the first pipeline 210 from communicating with the first water inlet 110, and controls the first valve assembly 230 to block the first water outlet 120 from communicating with the second pipeline 220, so that the water in the first pipeline 210 flows through the third pipeline 250, enters the single channel desalination module 100 from the first water outlet 120 of the single channel desalination module 100, carries the salt substances released by the single channel desalination module 100, and then is discharged through the concentrated water outlet 130.

Illustratively, the household water purification apparatus further includes a waste water tank connected to the concentrate outlet 130, and the concentrate discharged from the concentrate outlet 130 may be stored in the waste water tank. Illustratively, the concentrate discharged from the concentrate outlet 130 may also be discharged through a water pipe.

In other embodiments, the single-channel desalination assembly 100 can be removably received within the interior of a domestic water purification device, such that the single-channel desalination assembly 100 can be removed from the domestic water purification device for flushing when desired, thereby allowing regeneration of the filter elements of the single-channel desalination assembly 100.

In some embodiments, as shown in fig. 5 and 6, a second conductivity detection module 20 may be disposed on the concentrated water outlet 130, and the second conductivity detection module 20 may be capable of detecting the quality of the concentrated water discharged from the concentrated water outlet 130.

Specifically, the first pipe 210 may be provided with the flow sensor 30.

Illustratively, the control module 300 can also determine the regeneration progress of the single channel desalination module 100 according to the detection data of the first conductivity detection module 10, the second conductivity detection module 20 and the flow sensor 30 in the first pipeline 210.

Illustratively, the control assembly 300 is capable of determining the regeneration effect of the single-channel desalination assembly 100 based on the conductivity data detected by the first conductivity detection assembly 10, the conductivity data detected by the second conductivity detection assembly 20, and the flow data detected by the flow sensor 30, for example, the amount of salt released by flushing the single-channel desalination assembly 100 during regeneration can be determined, for example, the regeneration mode can be terminated when the amount of salt released reaches a predetermined release threshold, such as 80% -150% of the salt absorption capacity Q.

Specifically, the control module 300 determines that the regeneration progress of the single-channel desalination module 100 reaches the target progress, for example, when the amount of the salt-like substance released by flushing the single-channel desalination module 100 during the regeneration process reaches a preset release threshold, the following steps are performed:

the first valve assembly 230 is controlled to open the passage between the first water outlet 120 and the second pipe 220, and the second valve assembly 240 is controlled to open the passage between the first pipe 210 and the first water inlet 110, and close the passage between the first pipe 210 and the third pipe 250. When the single-channel desalination module 100 is applied with a forward voltage, the water in the first pipeline 210 can flow through the single-channel desalination module 100 for purification and then flow out through the second pipeline 220, which is convenient for users to use pure water.

In some embodiments, as shown in FIG. 6, a water inlet solenoid valve 211 is also provided in the first conduit 210, and a second valve assembly 240 is positioned between the water inlet solenoid valve 211 and the single channel desalination assembly 100.

Illustratively, as shown in FIG. 4, water inlet solenoid valve 211 may also be coupled to control assembly 300, and when control assembly 300 controls water inlet solenoid valve 211 to open, water from first conduit 210 may be directed to single channel desalination assembly 100 or to third conduit 250.

For example, the control module 300 may control the water inlet solenoid valve 211 to be opened and closed intermittently when the single-channel desalination module 100 is de-energized or when a voltage in the opposite direction is applied. It will be appreciated that by intermittently turning the water inlet solenoid valve 211 on and off, water entering the single channel desalination assembly 100 via the third conduit 250 can flush the single channel desalination assembly 100 in a pulsed water stream, which can increase the efficiency of the regeneration of the single channel desalination assembly 100 and reduce the amount of wastewater generated during the regeneration.

In some embodiments, as shown in fig. 6, a heating assembly 212 may be provided on the first pipe 210. The heating assembly 212, which may comprise, for example, a heat exchanger, is coupled to the control assembly 300.

For example, when the single-channel desalination assembly 100 applies a positive voltage to purify the water flowing in the first water inlet 110, the water entering the single-channel desalination assembly 100 can be preheated by the heating assembly 212, for example, the water flowing through the single-channel desalination assembly is heated to 30-70 ℃; after the water is preheated, the ion migration rate is improved, and when the water enters the single-channel desalination assembly 100 for purification treatment, the purification efficiency is higher.

For example, in the regeneration mode of operation, when the control module 300 powers down the single-channel desalination module 100 or applies a voltage in the opposite direction to regenerate the single-channel desalination module 100, the water entering the single-channel desalination module 100 can be preheated by the heating module 212, for example, the water flowing through the heating module can be heated to 30-70 ℃; after the water with higher temperature enters the single-channel desalination assembly 100, the salt substances adsorbed by the single-channel desalination assembly 100 can be washed away more quickly and sufficiently, so that the regeneration efficiency can be improved.

Illustratively, the water preheated by the heating assembly 212 may be used to flush the single channel desalination assembly 100 in a pulsed water flow, which may improve the efficiency of the regeneration of the single channel desalination assembly 100, save time, and reduce the amount of wastewater and energy consumption during regeneration.

For example, as shown in fig. 4, the heating assembly 212 may include a temperature sensor 50 connected to the control assembly 300, and the control assembly 300 adjusts the heating power of the heating assembly 212 according to the temperature data fed back by the temperature sensor 50 to keep the temperature of the water flowing through the heating assembly 212 not exceeding a preset temperature threshold, so as to prevent the water with too high temperature from damaging the single-channel desalination assembly 100.

For example, as shown in fig. 6, a pressure reducing valve 213 may be provided on the first pipe 210. For example, when the first pipe 210 is connected to a tap water pipe, the water pressure of the first pipe 210 may be lowered to protect the water purification effect of the single channel desalination assembly 100.

In some embodiments, as shown in fig. 6, a scale inhibition assembly 251 may be provided on the third pipe 250, the scale inhibition assembly 251 releasing the scale inhibitor into the water when water flows through the third pipe 250.

Illustratively, the scale inhibiting assembly 251 includes a receptacle for holding a scale inhibitor such as citric acid, which can be in communication with the third conduit 250, and water flowing through the third conduit 250 can carry the scale inhibitor into the single-channel desalination assembly 100, clean the single-channel desalination assembly 100, descale the conduits and the single-channel desalination assembly 100 during flushing, and improve the regeneration efficiency of the single-channel desalination assembly 100 and reduce the amount of wastewater during regeneration.

Illustratively, as shown in fig. 6, a check valve 252 may be provided on the third pipe 250 to limit the flow direction of the water in the third pipe 250.

Illustratively, the check valve 252 may include a receptacle for holding an anti-scaling agent, such as citric acid, which may be in communication with the third conduit 250, and the water flowing through the third conduit 250 may carry the anti-scaling agent into the single-channel desalination assembly 100, clean the single-channel desalination assembly 100, descale the conduit and the single-channel desalination assembly 100 during flushing, and increase the regeneration efficiency of the single-channel desalination assembly 100 and reduce the amount of wastewater generated during regeneration.

In some embodiments, in the regeneration mode of operation, when the control assembly 300 de-energizes the single channel desalination assembly 100 or applies a voltage in the opposite direction for regeneration, the control assembly 300 can intermittently apply and de-energize the single channel desalination assembly 100 with a voltage in the opposite direction.

For example, when the single-channel desalination assembly 100 is regenerated, the control assembly 300 can control the power supply assembly 400 to apply the reverse voltage to the single-channel desalination assembly 100 and to cut off the power at intervals, that is, to apply the reverse voltage to the single-channel desalination assembly 100 for a certain time, then to cut off the power for a certain time, and then to continue to apply the reverse voltage for a certain time, then to cut off the power for a certain time, so as to reduce the power consumption for regeneration.

For example, the control power supply module 400 applies a voltage in the opposite direction to the single channel desalination module 100 when the control inlet solenoid valve 211 is open, and the control power supply module 400 de-energizes the single channel desalination module 100 when the control inlet solenoid valve 211 is closed.

Illustratively, as shown in FIG. 6, a plurality of outlet conduits 260 may be connected to the second conduit 220 at an end thereof remote from the first outlet port 120.

Illustratively, at least one of the water outlet pipes 260 is provided with a heating unit 261. The heating unit 261 includes, for example, a heat exchanger or the like. The heating unit 261 may heat the water flowing out of the second pipe 220 to provide the user with hot water of a desired temperature.

When the single channel desalination assembly 100 applies a positive voltage to purify the water flowing in from the first water inlet 110, the water entering the single channel desalination assembly 100 is preheated by the heating assembly 212, the pure water output from the second pipeline 220 has a higher temperature, so that when the hot water is output from the water output pipeline 260, the heating unit 261 on the water output pipeline 260 has a lower workload, and the water output pipeline 260 can output water with a sufficient temperature, for example, 85-100 degrees of hot water, at a higher speed.

Illustratively, a pure water tank may be connected to an end of the second pipe 220 away from the first water outlet 120, and pure water output from the second pipe 220 may be stored in the pure water tank for a user to take. Illustratively, the plain water tank may be connected to a plurality of water outlet lines 260. Illustratively, at least one of the water outlet pipes 260 is provided with a heating unit 261.

For example, the outlet line 260 may have an outlet valve, and when the outlet valve is opened, the outlet line 260 discharges water.

For example, a water outlet pump may be disposed on the water outlet pipeline 260 to accelerate water receiving speed and reduce waiting time for water receiving of a user.

In some embodiments, as shown in FIG. 6, a first filtering assembly 214 may be disposed in the first conduit 210, and the first filtering assembly 214 may perform a certain purification treatment on the water entering the single-channel desalination assembly 100, such as removing particulate impurities, residual chlorine, and the like, in the water, reducing the workload and consumption of the single-channel desalination assembly 100, and prolonging the regeneration cycle and the service life thereof.

In some embodiments, as shown in fig. 6, a second filtering assembly 221 may be disposed on the second pipeline 220, and the second filtering assembly 221 may further improve the quality of the pure water output from the household water purifying apparatus.

Illustratively, first filter assembly 214, second filter assembly 221 may include a PP cotton filter element and/or an activated carbon filter element.

Illustratively, the first filter assembly 214 and the second filter assembly 221 have a filter fineness of no greater than 5 microns.

Illustratively, the first filter assembly 214 may include a bacteriostatic filter element and/or a descale filter element.

Wherein, the bacteriostatic filter element contains bacteriostatic particles, for example, the bacteriostatic filter element is filled with silver-loaded carbon, alumina fiber, bacteriostatic resin or bacteriostatic plastic particles. Specifically, the PP cotton and/or the activated carbon may be filled with silver carbon, alumina fiber, bacteriostatic resin, bacteriostatic plastic particles, or the like.

When the water in the first pipeline 210 flows through the bacteriostatic filter element in the first filtering assembly 214, the bacteriostatic ions or compounds in the bacteriostatic filter element slowly precipitate out into the water, and the water with the bacteriostatic ions or compounds can flow into the single-channel desalination assembly 100. When the single-channel desalination assembly 100 is powered on, the single-channel desalination assembly 100 can adsorb bacteriostatic ions or bacteriostatic compounds in water, so that the purified water flowing out of the single-channel desalination assembly 100 can not contain bacteriostatic ions or bacteriostatic compounds, and a user can be ensured to obtain pure water. At the same time, the bacteriostatic ions or compounds remaining in the single-channel desalination assembly 100 can kill or inhibit bacteria, etc. in the single-channel desalination assembly 100, preventing bacterial growth in the single-channel desalination assembly 100.

Wherein, the descaling filter element can be filled with scale inhibitors such as citric acid and the like. As the water in the first pipe 210 flows through the descaling filter, the scale inhibitor slowly precipitates into the water. When the single-channel desalination assembly 100 is subjected to regeneration treatment, water carrying a scale inhibitor enters the single-channel desalination assembly 100 through the third pipeline 250, the single-channel desalination assembly 100 is cleaned, the pipeline and the single-channel desalination assembly 100 can be descaled during flushing, the regeneration efficiency of the single-channel desalination assembly 100 can be improved, and the wastewater amount during regeneration is reduced.

Specifically, the descaling filter element can be connected in parallel with the bacteriostatic filter element, the PP cotton filter element and the activated carbon filter element, at least one end of the descaling filter element is provided with a valve, and the valve is closed when the single-channel desalination assembly 100 performs purification treatment on water flowing through, so that a scale inhibitor can be prevented from entering the single-channel desalination assembly 100; during regeneration of the single-channel desalination assembly 100, the valve can be opened so that when the water in the first pipeline 210 flows through the descaling filter, the scale inhibitor slowly precipitates into the water, and the water carrying the scale inhibitor enters the single-channel desalination assembly 100 through the third pipeline 250.

The domestic water purifying device provided by the embodiment of the specification comprises a control component, a single-channel desalting component and a pipeline system; the single-channel desalination assembly comprises a first water inlet and a first water outlet, 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 pipeline system comprises a first pipeline and a second pipeline; the first pipeline is connected with the first water inlet and used for supplying water to the first water inlet; the second pipeline is connected with the first water outlet; specifically, the second pipeline is provided with a first valve component, the single-channel desalination component also comprises a concentrated water outlet, and the first pipeline is provided with a first conductivity detection component; the control component detects the water quality of the inlet water of the single-channel desalination component through the first conductivity detection component, determines the regeneration period or the regeneration frequency according to the water quality of the inlet water, and enters the regeneration working mode according to the regeneration period or the regeneration frequency; in the regeneration working mode, the control component cuts off the power of the single-channel desalination component or applies reverse voltage to the single-channel desalination component, and controls the first valve component to close the channel between the first water outlet and the second pipeline, so that the water flowing into the single-channel desalination component carries salt substances to be discharged from the concentrated water outlet. When the single-channel desalting component is used for purifying water flowing through, no waste water is discharged, so that the utilization rate of water is improved; but also can wash regeneration to single flow path desalination subassembly when needing, guarantee better water purification effect.

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, and these modifications or substitutions are intended to be included in the scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

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

a control component;

in the regeneration operation mode, the control component powers off or applies a reverse voltage to the single-channel desalination component, and controls the first valve component to close a channel between the first water outlet and the second pipeline, so that the water flowing into the single-channel desalination component carries salt substances to be discharged from the concentrated water outlet.

2. The domestic water purification apparatus of claim 1, wherein said first pipe has a second valve assembly, said pipe system further comprising a third pipe, one end of said third pipe being connected to said first valve assembly, the other end of said third pipe being connected to said second valve assembly;

in the regeneration mode of operation, the control assembly further controls the second valve assembly to close the passage between the first conduit and the first water inlet and open the passage between the first conduit and the third conduit to allow water from the first conduit to flow into the single channel desalination assembly via the third conduit.

3. The domestic water purification apparatus of claim 2, wherein a flow sensor is disposed on the first pipeline, the concentrate outlet is disposed with a second conductivity detection module, the control module further determines a regeneration progress of the single channel desalination module according to detection data of the first conductivity detection module, the second conductivity detection module and the flow sensor, and when the regeneration progress reaches a target progress:

and controlling the first valve assembly to open a channel between the first water outlet and the second pipeline, controlling the second valve assembly to open a channel between the first pipeline and the first water inlet, and closing a channel between the first pipeline and the third pipeline.

4. The domestic water purification apparatus of claim 1, wherein said concentrate outlet is connected to an outlet valve, and said control unit controls said outlet valve to open when said single-channel desalination module is de-energized or when a reverse voltage is applied.

5. The domestic water purification apparatus of claim 2, wherein said first conduit is further provided with a water inlet solenoid valve, and said second valve assembly is located between said water inlet solenoid valve and said single-channel desalination assembly;

when the single-channel desalination assembly is powered off or reverse voltage is applied, the water inlet electromagnetic valve is opened and closed at intervals.

6. The domestic water purification device of claim 2, wherein said third pipe is provided with a scale inhibiting component, said scale inhibiting component releasing a scale inhibitor into water when water flows through said third pipe.

7. A domestic water purification device as claimed in any one of claims 1 to 6, wherein a heating element is provided on the first conduit; and/or

A pressure reducing valve is arranged on the first pipeline; and/or

A first filtering component is arranged on the first pipeline; and/or

A second filtering component is arranged on the second pipeline;

wherein the filtration precision of the first filter assembly and the second filter assembly is not more than 5 microns.

8. The domestic water purification apparatus of any one of claims 1-6, wherein in said regeneration mode of operation, said control module intermittently applies a reverse direction voltage to and de-energizes said single channel desalination module.

9. The domestic water purification apparatus of any one of claims 1-6, wherein the single-channel desalination assembly comprises a physisorption desalination cartridge and/or a chemisorption desalination cartridge.

10. The domestic water purification apparatus of claim 9, 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.

11. The domestic water purification device of any one of claims 1-6, wherein an end of said second pipe remote from said first water outlet is connected to a plurality of water outlet pipes, and wherein at least one of said water outlet pipes is provided with a heating unit.

12. The domestic water purification device of claim 1 or 2, wherein a flow sensor is provided on said first pipe and/or said second pipe, and said control unit enters said regeneration mode according to flow data from said flow sensor and said regeneration cycle or said regeneration frequency.