CN114074974A

CN114074974A - Electric deionization water purification device and household water purification device

Info

Publication number: CN114074974A
Application number: CN202010808821.3A
Authority: CN
Inventors: 陈小平; 吕苏; 晏博; 董红晨; 周凤凤
Original assignee: Yunmi Internet Technology Guangdong Co Ltd
Current assignee: Yunmi Internet Technology Guangdong Co Ltd
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2022-02-22

Abstract

The embodiment of the application discloses electrodeionization water purification device and domestic water purification device, electrodeionization water purification device include electrodialysis subassembly and two at least electrode assemblies, and the electrodialysis subassembly is located between two electrode assemblies, and the electrodialysis subassembly includes the ion exchange membrane that a plurality of intervals set up. The electrodialysis assembly further comprises a plurality of water guide grids, and the ion exchange membrane and the water guide grids form a composite whole. The ion exchange membrane is connected with the water guide grid to form a composite whole, so that the flow steps of the electric deionization water purification device during assembly are reduced, and the manufacturing cost of the ion exchange membrane and the water guide grid is reduced.

Description

Electric deionization water purification device and household water purification device

Technical Field

The application relates to the technical field of water purification, in particular to an electric deionization water purification device and a household water purification device.

Background

The electrodialysis is to realize the purposes of concentration, desalination, refining and purification of the solution by utilizing the selective permeability of the ion exchange membrane and the directional migration of charged ions through the ion exchange membrane to separate the charged ions from the aqueous solution and other uncharged components under the action of a direct current electric field.

In the current market, an electrodialysis membrane stack is generally formed by alternately arranging ion exchange membranes and water guide grids, but the water guide grids and the ion exchange membranes are different elements, so that the cost is high, and the process is complex in the assembly process of the electrodialysis membrane stack.

Disclosure of Invention

The application provides an electric deionization purifier and domestic purifier can reduce the cost of ion exchange membrane and water guide graticule mesh, reduces the equipment flow of ion exchange membrane and water guide graticule mesh simultaneously.

The first aspect of the embodiment of this application provides an electrodeionization purifier, includes:

at least two electrode assemblies;

the electrodialysis assembly is positioned between the two electrode assemblies and comprises a plurality of ion exchange membranes arranged at intervals;

the electrodialysis assembly further comprises a plurality of water guide grids, and the ion exchange membrane is connected with the water guide grids to form a composite whole.

In the electrodeionization water purification device provided by the embodiment of the application, the ion exchange membrane is provided with a groove, and the water guide grid is arranged in the groove; and/or the ion exchange membrane covers the surface of the water guide grid.

In the electrodeionization water purification device provided by the embodiment of the application, in the electrodialysis assembly, the water guide grid and the ion exchange membranes are alternately arranged.

In the electrodeionization water purification device that this application embodiment provided, the electrodialysis subassembly with be equipped with sealed the pad between the electrode subassembly, sealed both ends of filling up respectively with the electrode subassembly with the electrodialysis subassembly butt is in order to seal the electrodialysis subassembly.

In the electrodeionization water purification unit that this application embodiment provided, sealed the pad is equipped with the shrinkage pool, is close to electrode subassembly ion exchange membrane with the water guide graticule mesh all sets up in the shrinkage pool, so that ion exchange membrane the water guide graticule mesh with sealed pad forms compound whole.

In the electrodeionization water purification device provided by the embodiment of the application, a plurality of exchange membrane intervals are arranged among a plurality of ion exchange membranes.

In the electrodeionization water purification device provided by the embodiment of the application, the electrodeionization water purification device further comprises a first pressing plate and a second pressing plate, wherein the first pressing plate and the second pressing plate are respectively abutted to the electrode assemblies.

In the electrodeionization water purification device provided by the embodiment of the application, a water inlet is formed in the first pressing plate, and the exchange membrane is communicated with the water inlet at intervals.

In the electrodeionization water purification device provided by the embodiment of the application, the electrodeionization water purification device further comprises a power supply assembly;

when water enters the water inlet and the power supply assembly supplies power, the potential of one electrode assembly is higher than that of the other electrode assembly, so that pure water is output at one of any two adjacent exchange membrane intervals, and waste water is output at the other exchange membrane interval.

In the electrodeionization water purification device provided by the embodiment of the application, the second pressing plate is provided with at least two water outlets for discharging water output at intervals from the exchange membrane.

In the electrodeionization water purification device provided by the embodiment of the application, the wastewater output by the exchange membrane interval flows out of one of the water outlets; the pure water output by the exchange membrane interval flows out from the other water outlet.

In the electrodeionization water purification device that this application embodiment provided, electrodeionization water purification device still is equipped with the subassembly that catchments, the subassembly that catchments includes pure water route and waste water route, the pure water route is used for concentrating the pure water that electrodeionization water purification device produced, the waste water route is used for concentrating the waste water that electrodeionization water purification device produced.

The second aspect of the embodiment of the present application provides a household water purifying device, comprising the electric deionization water purifying device as described above

The technical scheme provided by the embodiment of the application can have the following beneficial effects: the application provides an electrodeionization water purification device and domestic water purification device, electrodeionization water purification device include electrodialysis subassembly and two at least electrode subassemblies, and the electrodialysis subassembly is located between two electrode subassemblies, and the electrodialysis subassembly includes the ion exchange membrane that a plurality of intervals set up. The electrodialysis assembly further comprises a plurality of water guide grids, and the ion exchange membrane and the water guide grids form a composite whole. The ion exchange membrane and the water guide grid are connected and combined to form a composite whole, so that the steps of the electric deionization water purifying device during assembly are reduced, and the manufacturing cost of the ion exchange membrane and the water guide grid is reduced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

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 an electrodeionization water purification device according to an embodiment of the present disclosure;

FIG. 2 is an exploded view of the electrodeionization water purification unit of FIG. 1;

FIG. 3 is a schematic view of the electrodeionization water purification device of FIG. 1 from another angle;

FIG. 4 is an exploded view of the water-conducting mesh and ion exchange membrane of FIG. 2;

FIG. 5 is a schematic view of the combination of the water-conducting mesh and the ion-exchange membrane of FIG. 2;

FIG. 6 is a schematic cross-sectional view A-A of FIG. 5;

FIG. 7 is an exploded schematic view of the water-conducting mesh, ion exchange membrane and gasket of FIG. 2;

FIG. 8 is a schematic view of the combination of the water-conducting mesh, ion-exchange membrane and gasket of FIG. 2;

FIG. 9 is a schematic cross-sectional view B-B of FIG. 8;

FIG. 10 is a schematic flow diagram of the electrodeionization water purification unit of FIG. 1;

fig. 11 is a schematic flow chart of a household water purifying device according to an embodiment of the present application.

The figures show that:

1000. a domestic water purification device;

10. an electrodeionization water purification unit;

100. an electrode assembly; 110. a first electrode; 120. a second electrode; 130. a waterproof member;

200. an electrodialysis assembly; 210. an ion exchange membrane; 2101. a groove; 211. a cation exchange membrane; 212. an anion exchange membrane; 220. a water guiding grid; 230. exchanging the membrane space;

300. a first platen; 310. a water inlet; 320. a first conductive via;

400. a second platen; 410. a water outlet; 420. a second conductive via;

500. a gasket; 510. concave holes;

600. a fastener; 700. a power supply assembly;

800. a water collection assembly; 810. a pure water waterway; 820. a wastewater waterway;

20. a water flow line;

201. a water inlet pipeline; 202. a pure water line; 203. a first filter assembly; 204. a second filter assembly; 205. a heating unit; 206. and (4) a water outlet valve.

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.

In the description of the present application, it is to 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," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present application. Furthermore, the terms "first", "second" 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

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.

Referring to fig. 1 to 6, the electrodeionization water purification device 10 includes an electrodialysis assembly 200 and at least two electrode assemblies 100, the electrodialysis assembly 200 is located between the two electrode assemblies 100, and the electrodialysis assembly 200 includes a plurality of ion exchange membranes 210 arranged at intervals. The electrodialysis assembly 200 further includes a plurality of water guide grids 220, and the ion exchange membrane 210 is connected with the water guide grids 220 to form a composite whole.

Specifically, the electrodeionization water purification device 10 includes one or more pairs of electrode assemblies 100, i.e., the electrodeionization water purification device 10 includes at least two electrode assemblies 100.

Illustratively, the electrode assembly 100 may employ a DSA electrode, a lead electrode, or a graphite electrode.

Wherein an electrodialysis assembly 200 is arranged between at least one pair of electrode assemblies 100, and the electrodialysis assembly 200 is positioned between two electrode assemblies 100.

The ion exchange membrane 210 is a thin film made of a polymer material having selective permeability to ions. Specifically, the cation exchange membrane 211 is an ion exchange membrane 210 in which the membrane body fixing groups carry negatively charged ions and can selectively transmit positively charged cations; the anion exchange membrane 212 is an ion exchange membrane 210 in which the membrane-immobilized groups carry positively charged ions and selectively pass negatively charged anions.

By adopting the above technical scheme, the ion exchange membrane 210 and the water guide grid 220 are combined to form a composite whole, so that the steps of assembling the electrodeionization water purification device 10 are reduced, and the manufacturing cost of the ion exchange membrane 210 and the water guide grid 220 is reduced.

Referring to fig. 4 to 6, in an alternative embodiment, the ion exchange membrane 210 has a groove 2101, and the water guiding grid 220 is disposed in the groove 2101. In another alternative embodiment, the ion exchange membrane 210 covers the surface of the water guide grid 220, so as to ensure that the ion exchange membrane 210 and the water guide grid 220 are connected to form a composite whole, which is not limited in the present application.

It can be understood that the connection between the ion exchange membrane 210 and the water guide grid 220 is one or more of welding (thermal welding, ultrasonic welding or high frequency welding), adhesion, etc., so that the ion exchange membrane 210 and the water guide grid 220 can be a composite whole, and the application is not limited thereto.

It is understood that the swelling ratio of the ion-exchange membrane 210 in both the length direction and the width direction is not more than 5%. The water-guiding grid 220 is made of hydrophobic material and will not expand due to water contact, and the ion exchange membrane 210 has a certain swelling phenomenon after contacting water because of the effect of ion migration. In order to ensure the connection relationship between the ion exchange membrane 210 and the water guide grid 220, the swelling filter of the ion exchange membrane 210 is required to be not more than 5%, such as 5%, 4% or 2%, so as to ensure that the ion exchange membrane 210 maintains the connection relationship with the water guide grid 220 in the normal operation of the electrodeionization water purification device 10, and the phenomena of breakage, breakage and the like of the ion exchange membrane 210 due to water swelling or the phenomena of separation of the ion exchange membrane 210 from the water guide grid 220 due to water swelling are avoided.

In an alternative embodiment, a water-conducting grid 220 is arranged in the electrodialysis stack 200 alternating with ion exchange membranes 210. The ion exchange membrane 210 comprises a first face provided with a groove 2101 and a second face opposite to the first face, and in the electrodialysis assembly 200, the first face of the ion exchange membrane 210 is oriented in the same direction as the first face of the adjacent ion exchange membrane 210, so that the water guiding mesh 220 can function to divert water in the exchange membrane space 230. Illustratively, the first surface of the ion exchange membrane 210 faces the first pressing plate 300, and the first pressing plate 300 is provided with a water inlet 310.

Illustratively, the first side of the ion exchange membrane 210 is flush with a side of the water guide mesh 220.

Referring to fig. 1 to 2, in an alternative embodiment, a gasket 500 is disposed between the electrodialysis assembly 200 and the electrode assembly 100, and the gasket 500 abuts against the electrode assembly 100. It will be appreciated that by providing the gasket 500, the raw water entering from the water inlet 310 must pass through the electrodialysis stack 200 without flowing out of other channels.

Referring to fig. 2 and 7 to 9, in an alternative embodiment, the sealing gasket 500 is provided with a recess 510, and the ion exchange membrane 210 and the water guiding mesh 220 adjacent to the electrode assembly 100 are disposed in the recess 510, so that the ion exchange membrane 210, the water guiding mesh 220 and the sealing gasket 500 form a composite whole.

Illustratively, one side of the gasket 500 is flush with one side of the ion exchange membrane 210, and the other side of the gasket 500 is flush with one side of the water guide mesh 220.

Referring to fig. 10, in an alternative embodiment, the ion exchange membranes 210 include cation exchange membranes 211 and anion exchange membranes 212, and the electrodialysis stack 200 is formed by alternately arranging a plurality of cation exchange membranes 211 and a plurality of anion exchange membranes 212. A plurality of exchange membrane compartments 230 are provided between the plurality of cation exchange membranes 211 and the plurality of anion exchange membranes 212. The raw water to be purified undergoes ion transfer while flowing in the exchange membrane compartment 230, thereby allowing the raw water to be purified.

Referring to fig. 1 to 3, in an alternative embodiment, the electrodeionization water purification device 10 further includes a first pressing plate 300 and a second pressing plate 400, wherein the first pressing plate 300 and the second pressing plate 400 are respectively abutted against the two electrode assemblies 100. It can be understood that the first pressing plate 300 and the second pressing plate 400 mainly function to fix the components of the electrodeionization water purification device 10 as a whole, so that the electrodeionization water purification device 10 normally operates.

Referring to fig. 1 and 2, in an alternative embodiment, the first pressing plate 300 is provided with a water inlet 310, and the water inlet 310 is communicated with the exchange membrane space 230. The water inlet 310 may be connected to, for example, a tap water pipe, a water tank, or the like.

Referring to fig. 10, in an alternative embodiment, the electrodeionization water purification device 10 further includes a power supply assembly 700, wherein the power supply assembly 700 is electrically connected to the electrode assembly 100. When the power supply assembly 700 supplies power, the potential of one electrode assembly 100 on both sides of the electrodialysis assembly 200 is higher than the potential of the other electrode assembly 100, so that a potential difference is generated between the two electrode assemblies 100, raw water to be purified can enter the exchange membrane space 230 between the anion exchange membrane 212 and the cation exchange membrane 211 through the water inlet 310, and the potential difference between the two electrode assemblies 100 drives ions in the exchange membrane space 230 to migrate under the action of an electric field, thereby completing the purification of the raw water.

Referring to fig. 10, in an alternative embodiment, when water is fed from the water inlet 310 and the power supply module 700 supplies power, one exchange membrane compartment 230 of any two adjacent exchange membrane compartments 230 outputs pure water, and the other exchange membrane compartment 230 outputs waste water.

It can be understood that, when water enters the water inlet 310 and the power supply assembly 700 supplies power, the ion exchange membrane 210 in the exchange membrane interval 230 is formed, and when the electrode close to the higher potential is the cation exchange membrane 211, the exchange membrane interval 230 outputs wastewater; when the electrode near the higher potential in the exchange membrane compartment 230 is the anion exchange membrane 212, the exchange membrane compartment 230 outputs pure water. I.e., the exchange membrane space 230 between the cation exchange membrane 211 near the higher potential electrode and the adjacent anion exchange membrane 212 outputs wastewater; the exchange membrane space 230 between the anion exchange membrane 212 near the higher potential electrode and the adjacent cation exchange membrane 211 outputs pure water.

Specifically, when the ion exchange membrane 210 in the exchange membrane interval 230 is the cation exchange membrane 211 close to the higher potential electrode, cations such as Na + in the raw water pass through the exchange membrane interval 230 under the action of the electric field, and anions such as Cl-ions in the raw water pass through the exchange membrane interval 230 under the action of the electric field, so that the salt solubility of water in the exchange membrane interval 230 is increased, and the exchange membrane interval 230 outputs wastewater.

Specifically, when the ion exchange membrane 210 in the exchange membrane interval 230 is the cation exchange membrane 211 close to the higher potential electrode, cations such as Na + in the raw water pass through the exchange membrane interval 230 under the action of the electric field, and anions such as Cl "ions in the raw water pass through the exchange membrane interval 230 under the action of the electric field, so that the salt solubility of the water in the exchange membrane interval 230 is smaller and smaller, and the exchange membrane interval 230 outputs pure water.

Referring to fig. 2 and 3, in an alternative embodiment, the second pressing plate 400 is provided with at least two water outlets 410 for discharging the wastewater and the pure water respectively from the membrane separation 230. Wastewater and pure water are discharged through different water outlets 410, respectively, for different purposes, pure water can be used for drinking, cleaning, etc., and wastewater can be used for extracting salt, etc.

Referring to fig. 1 to 3, in an alternative embodiment, a first conductive hole 320 is formed on the first pressing plate 300, a second conductive hole 420 is formed on the second pressing plate 400, and the power supply assembly 700 is electrically connected to the electrode assembly 100 through the first conductive hole 320 and the second conductive hole 420. It is understood that terminals are disposed in the first conductive hole 320 and the second conductive hole 420, and both ends of the terminals are electrically connected to the electrode assembly 100 and the power supply assembly 700, respectively, so that the electric deionized water purification apparatus 10 can be operated by supplying electricity.

Referring to fig. 1 to 3, in an alternative embodiment, the first pressing plate 300 and the second pressing plate 400 are respectively provided with a plurality of connecting holes, and the electrodeionization water purification device 10 further includes fasteners 600, wherein the number of the fasteners 600 is adapted to the number of the connecting holes. And the fastener 600 is at least partially inserted into the connecting hole, so that the first pressing plate 300 and the second pressing plate 400 are closed in opposite directions, the ion exchange membrane 210 and the water guide grid 220 in the electrodialysis assembly 200 are extruded with each other, a complete water flow channel is formed inside the electrodialysis assembly 200, and meanwhile, the sealing gasket 500, the electrodialysis assembly 200 and the electrode assembly 100 are closed with each other, so that the sealing gasket 500 can play a sealing role, and the leakage of raw water to be purified is prevented.

Referring to fig. 10 and 11, in an alternative embodiment, the electrodeionization water purification device 10 is provided with a water collecting assembly 800, wherein the water collecting assembly 800 includes a pure water channel 810 and a waste water channel 820.

The pure water channel 810 is used for collecting pure water generated by the electrodeionization water purifier 10, and the wastewater channel 820 is used for collecting wastewater generated by the electrodeionization water purifier 10.

For example, the wastewater discharged from the wastewater waterway 820 may be discharged to a wastewater tank or to a wastewater tank through a pipe.

Illustratively, the pure water circuit 810 may be connected to the pure water tank so that the user obtains pure water from the pure water tank.

Referring to fig. 10, the electrodialysis assembly 200 includes a plurality of anion exchange membranes 212 and a plurality of cation exchange membranes 211, the cation exchange membranes 211 and the anion exchange membranes 212 are alternately arranged, the cation exchange membranes 211 are heterogeneous membranes, and at least one of the anion exchange membranes 212 is a homogeneous membrane or a semi-homogeneous membrane.

The heterogeneous ion exchange membrane 210 is formed by mixing powdered ion exchange resin and a binder, pulling a sheet, and hot-pressing with a net, and the resin is dispersed in the binder, so that the chemical structure is not uniform, the mechanical property is better, the manufacture is simple, but the dialysis performance is poorer.

The homogeneous ion exchange membrane 210 is prepared by introducing active groups into an inert polymer support, has a uniform chemical structure, small pores, small membrane resistance, low possibility of leakage, excellent electrochemical performance, but is complex to manufacture and low in mechanical strength. The semi-homogeneous ion exchange membrane 210 is also made by introducing active groups into a polymer support, but the active groups do not form a chemical bond with an inert polymer support, and the performance of the membrane is between that of the homogeneous ion exchange membrane 210 and that of the heterogeneous ion exchange membrane 210.

It can be understood that when the anion exchange membrane 212 is a heterogeneous membrane, because the dialysis performance of the heterogeneous membrane is poor, Cl "ions in water pass through the anion exchange membrane 212 under the action of direct current, and cations such as Ca2+, Mg2+ and the like remain on the surface of the anion exchange membrane 212 to combine with carbonate in water to form water-insoluble calcium carbonate and magnesium carbonate, so that the surface of the anion exchange membrane 212 is easily scaled.

It is understood that the higher the salt concentration, the greater the risk of fouling the surface of the anion exchange membrane 212. In the electrodeionization water purification device 10, the salt concentration is higher and higher along the water flow direction, and the risk of scaling on the surface of the anion exchange membrane 212 is higher and higher.

By adopting the technical scheme, at least one of the anion exchange membranes 212 which are easy to scale is replaced by a homogeneous membrane or a semi-homogeneous membrane, so that the electrochemical performance of the anion exchange membranes 212 is improved, and meanwhile, the cation exchange membrane 211 which is difficult to scale is a heterogeneous membrane, so that the anion exchange membranes 212 are not easy to scale any more while the manufacturing cost is not obviously increased, and the performance of the electrodeionization water purification device 10 is greatly improved.

In an alternative embodiment, a plurality of anion exchange membranes 212 and a plurality of cation exchange membranes 211 are arranged and combined into a single-stage electrodialysis structure. It is understood that in another alternative embodiment, a plurality of anion exchange membranes 212 and a plurality of cation exchange membranes 211 are arranged and combined in a multi-stage electrodialysis structure, such as a two-stage electrodialysis structure or a three-stage electrodialysis structure.

It is understood that in a multi-stage electrodialysis structure, the risk of scaling of the anion exchange membrane 212 is higher as the water concentration in the electrodialysis structure is higher backward along the water flow direction, and at least one anion exchange membrane 212 in the electrodialysis structure at the backward stage is a homogeneous membrane or a semi-homogeneous membrane, so that compared with the case that the anion exchange membranes 212 in all the multi-stage electrodialysis structures are homogeneous membranes or semi-homogeneous membranes, the scaling risk of the electrodialysis module 200 can be obviously reduced without obviously reducing the manufacturing cost of the electrodialysis module 200.

Referring to fig. 1 and 2, in an alternative embodiment, the electrode assembly 100 includes a first electrode 110 and a second electrode 120, a waterproof member 130 is disposed between the first electrode 110 and the second electrode 120, and the first electrode 110 is electrically connected to the second electrode 120 through the waterproof member 130.

By adopting the above technical scheme, the conductive waterproof member 130 is arranged between the first electrode 110 and the second electrode 120, so that the influence on the normal operation of the electrode assembly 100 after the part of the electrode assembly 100, which is in contact with the electrodialysis assembly 200, is damaged due to current concentration and the like is prevented.

Illustratively, a first electrode 110 made of carbon is connected to the electrodialysis stack 200.

Illustratively, the second electrode 120 made of graphite is connected to the power supply assembly 700.

It can be understood that the second electrode 120 with good conductivity is connected to the power supply module 700 to improve the electric energy utilization efficiency of the electrodeionization water purification device 10, and the first electrode 110 with good oxidation resistance and the electrodialysis module 200 prevent the water in the electrodialysis membrane stack from contacting the second electrode 120 to cause the oxidation failure of graphite.

Illustratively, the waterproof member 130 is made of a conductive plastic cloth, and the thickness of the waterproof member 130 is 0.05 mm to 1 mm, such as 0.05 mm, 0.5 mm, or 1 mm. It is understood that the thicker the thickness of the waterproof member 130 is, the better the waterproof performance is; the thinner the thickness of the waterproof member 130 is, the better the conductivity is. Within the thickness range of 0.05 mm to 1 mm, the waterproof property and the conductivity of the waterproof member 130 can well satisfy the requirements of the electrode assembly 100.

Illustratively, the waterproof member 130 is made of a conductive plastic cloth having a sheet resistance value of 100 to 200000 ohms, such as 100, 1000, or 200000 ohms. It is understood that the smaller the sheet resistance value of the waterproof member 130, the better the conductivity, but the higher the cost; the waterproof material 130 has a large sheet resistance value and a lower cost, but has a lower conductivity. Illustratively, in the area resistance value range of 100 ohms to 1000 ohms, the conductivity of the waterproof member 130 meets the requirements of the electrode assembly 100, and the manufacturing cost can be controlled at a low level.

Referring to fig. 11, a second aspect of the present application provides a household water purifying apparatus 1000, wherein the household water purifying apparatus 1000 includes the above-mentioned electrodeionization water purifying apparatus 10.

In some embodiments, referring to fig. 11, the household water purifying apparatus 1000 further includes a water flow line 20, the water flow line 20 includes a water inlet line 201, a pure water line 202 and a waste water line, wherein the water inlet line 201 is connected to the water inlet 310 of the electric deionization water purifying apparatus 10, the pure water line 202 is connected to the pure water line 810 of the electric deionization water purifying apparatus 10, and the waste water line is connected to the waste water line 820 of the electric deionization water purifying apparatus 10.

Illustratively, the water inlet line 201 may be connected to a raw water tank.

For example, the raw water tank may include a transparent housing or a transparent window may be provided on the housing, so that a user may conveniently check the water quality, the water level, and the like in the raw water tank.

Illustratively, 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. Illustratively, the raw water tank is also provided with a liquid level meter, and when the liquid level in the raw water tank drops to a set value, a valve of the tap water pipe can be controlled to open to feed water to a water feeding port of the raw water tank.

It will be appreciated that the inlet line 201 may also be connected directly to a tap water line.

For example, referring to fig. 11, a first filtering assembly 203 may be disposed on the water inlet line 201, and may perform a certain purification treatment on the water entering the electrodeionization water purification device 10, for example, to remove substances such as particulate impurities and residual chlorine, so as to reduce the workload and consumption of the electrodeionization water purification device 10.

For example, as shown in fig. 11, a second filtering component 204 may be disposed on the pure water pipeline 202 to further improve the quality of the outlet water and improve the taste.

For example, the first and

second filter assemblies

203, 204 may include PP cotton filter elements and/or activated carbon filter elements, among others.

Illustratively, the first filter assembly 203 and the second filter assembly 204 have a filter fineness of no greater than 5 microns.

Illustratively, the water outlet line includes a water outlet valve 206, and the plain water line 202 outputs plain water when the water outlet valve 206 is open.

Illustratively, a heating unit 205 is disposed on at least one of the water outlet pipes. The heating unit 205 includes, for example, a heat exchanger or the like. The heating unit 205 may heat the water flowing out of the plain water pipe 202 to provide hot water of a desired temperature to a user.

The electric deionization water purification device 10 and the household water purification device 1000 provided in the above embodiments of the present specification include: the electrodeionization water purification device 10 includes an electrodialysis stack 200 and at least two electrode assemblies 100, the electrodialysis stack 200 being located between the two electrode assemblies 100. The electrodialysis assembly 200 comprises a plurality of anion exchange membranes 212 and a plurality of cation exchange membranes 211, the cation exchange membranes 211 and the anion exchange membranes 212 are alternately arranged, the cation exchange membranes 211 are heterogeneous membranes, and at least one of the anion exchange membranes 212 is a homogeneous membrane or a semi-homogeneous membrane. The anion exchange membranes 212 which are easy to scale are all or the most easy to scale are partially homogeneous membranes or semi-homogeneous membranes, so that the scale on the anion exchange membranes 212 is effectively reduced while the manufacturing cost of the electric deionization water purifying device 10 is not obviously increased, and the risk of scaling in the electric deionization water purifying device 10 and a pipeline and a water tank connected with the electric deionization water purifying device is reduced.

In the description of the present application, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

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

The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. An electrodeionization water purification unit, comprising:

at least two electrode assemblies;

2. The electrodeionization water purification device of claim 1, wherein the ion exchange membrane is provided with grooves, and the water guide grid is arranged in the grooves; and/or the ion exchange membrane covers the surface of the water guide grid.

3. The electrodeionization water purification unit of claim 1, wherein the water-conducting grids alternate with the ion-exchange membranes in the electrodialysis stack.

4. The electrodeionization water purification unit of claim 1, wherein a gasket is disposed between the electrodialysis stack and the electrode assembly, and opposite ends of the gasket are respectively abutted against the electrode assembly and the electrodialysis stack to seal the electrodialysis stack.

5. The electrodeionization water purification unit of claim 4, wherein the gasket is provided with a recess, the ion exchange membrane and the water directing grid adjacent to the electrode assembly are both disposed in the recess such that the ion exchange membrane, the water directing grid and the gasket form a composite entity.

6. The electrodeionization water purification unit of claim 1, wherein a plurality of ion exchange membranes are spaced apart.

7. The electrodeionization water purification unit of claim 6, further comprising a first pressure plate and a second pressure plate, the first pressure plate and the second pressure plate abutting the two electrode assemblies, respectively.

8. The electrodeionization water purification unit of claim 7, wherein the first platen has a water inlet, and the exchange membrane compartment is in communication with the water inlet.

9. The electrodeionization water purification unit of claim 8, further comprising a power supply assembly;

10. The electrodeionization water purification unit of claim 9, wherein the second platen is provided with at least two water outlets for discharging water intermittently output from the exchange membrane.

11. The electrodeionization water purification unit of claim 10, wherein wastewater output from the exchange membrane compartment flows out of one of the water outlets; the pure water output by the exchange membrane interval flows out from the other water outlet.

12. The electrodeionization water purification unit of any one of claims 6 to 11, further comprising a water collection assembly comprising a pure water path for collecting pure water produced by the electrodeionization water purification unit and a wastewater path for collecting wastewater produced by the electrodeionization water purification unit.

13. A domestic water purification device, characterized in that it comprises an electrodeionization water purification device according to any one of claims 1 to 12.