CN217264981U - Electrodialysis membrane stack and household appliance - Google Patents

Abstract

The utility model relates to an electrical apparatus manufacturing technology field provides an electrodialysis membrane stack and domestic appliance. The electrodialysis membrane stack comprises a plurality of membrane stack groups, each membrane stack group comprises at least two membrane stack units, and the membrane stack units are sequentially connected in series; each membrane stack unit comprises a first electrode and a second electrode, and the polarities of the first electrode and the second electrode are different; in each of the membrane stack groups, the first electrodes of the respective membrane stack units are connected to each other, and the second electrodes of the respective membrane stack units are connected to each other. The utility model discloses an electrodialysis membrane stack is convenient for utilize same voltage to control each membrane stack unit simultaneously to realize the purification treatment to the water based on the series connection water route that a plurality of membrane stack units formed, realize reaching the water purification function the same with the high voltage under relatively low voltage, thereby reduce the energy consumption of membrane stack, ensured the performance of membrane stack.

Description

Electrodialysis membrane stack and household appliance

Technical Field

The utility model relates to an electrical apparatus makes technical field, especially relates to an electrodialysis membrane stack and domestic appliance.

Background

Currently, with the development of science and technology, electrodialysis membrane stacks are widely used for desalination treatment of seawater and purification treatment of industrial sewage. The electrodialysis membrane stack is characterized in that an electrode group and an ion exchange membrane group are fastened into a whole through a clamping device, and under the action of voltage, the water body is purified by utilizing the selective permeation effect of a membrane on ions.

In the related art, the water purification performance of the electrodialysis membrane stack is improved mainly by increasing the number of membranes. However, since the voltage applied to each pair of membrane sheets is constant, when the number of membrane sheets is increased, it is necessary to apply a relatively high external voltage, which results in high energy consumption of the conventional electrodialysis membrane stack and difficulty in fully developing the performance of the membrane stack.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides an electrodialysis membrane stack realizes reducing the energy consumption of membrane stack to ensure the performance of membrane stack.

The utility model discloses still provide a domestic appliance.

According to the utility model discloses electrodialysis membrane stack of first aspect embodiment includes:

if the membrane stack groups are dry, each membrane stack group comprises at least two membrane stack units, and the membrane stack units are sequentially connected in series; each membrane stack unit comprises a first electrode and a second electrode, and the polarities of the first electrode and the second electrode are different;

in each of the membrane stack groups, the first electrodes of the respective membrane stack units are connected to each other, and the second electrodes of the respective membrane stack units are connected to each other.

According to the utility model discloses electrodialysis membrane stack is convenient for utilize same voltage to control each membrane stack unit simultaneously to realize the purification treatment to the water based on the series connection water route that each membrane stack unit formed, realize reaching the water purification function the same with the high voltage under relatively low voltage, thereby reduce the energy consumption of membrane stack, ensured the performance of membrane stack.

In addition, according to the utility model discloses electrodialysis membrane stack, can also have following additional technical characterstic:

according to the utility model discloses electrodialysis membrane stack is every in the membrane stack group, each the membrane stack unit is followed the thickness direction of membrane stack unit is arranged in proper order.

According to the utility model discloses electrodialysis membrane stack still includes: the first insulating partition plate is arranged between any two adjacent membrane stack units;

wherein, the water body can flow from the former membrane stack unit to the latter membrane stack unit through the first insulation partition plate along the thickness direction.

According to the utility model discloses electrodialysis membrane stack, first electrode with the second electrode is relative and locate separately the membrane stack unit is followed the both sides of thickness direction.

According to the utility model discloses electrodialysis membrane stack, membrane stack group includes two membrane stack units that establish ties mutually; the first electrodes of the two membrane stack units are constructed into a whole, and the second electrodes of the two membrane stack units are respectively arranged on two sides of the first electrodes constructed into a whole.

According to the electrodialysis membrane stack provided by the embodiment of the utility model, each membrane stack group is connected in series in sequence; the first electrodes of the respective membrane stack groups are connected to each other, and the second electrodes of the respective membrane stack groups are connected to each other.

According to the electrodialysis membrane stack provided by the embodiment of the utility model, each membrane stack group is arranged in sequence along the thickness direction of the membrane stack unit;

or all the membrane stack groups are sequentially arranged along a first direction, and the first direction is vertical to the thickness direction of the membrane stack units.

According to the utility model discloses electrodialysis membrane stack, the membrane stack unit includes ion exchange membrane group, ion exchange membrane group includes relative cation exchange membrane and anion exchange membrane that sets up; the ion exchange membrane group is clamped between the first electrode and the second electrode;

the guide plate, the guide plate includes first graticule mesh, second graticule mesh and third graticule mesh, first graticule mesh is located cation exchange membrane deviates from one side of anion exchange membrane, the second graticule mesh is located cation exchange membrane with between the anion exchange membrane, the third graticule mesh is located anion exchange membrane deviates from one side of cation exchange membrane.

According to the electrodialysis membrane stack provided by the embodiment of the utility model, the electrodialysis membrane stack is provided with a first water inlet, a second water inlet, a purified water outlet and a concentrated water outlet;

a first flow channel and a second flow channel are arranged in the electrodialysis membrane stack; the first water inlet is communicated with one end of the first flow passage, and the other end of the first flow passage is communicated with the purified water outlet; the second water inlet is communicated with one end of the second flow channel, and the other end of the second flow channel is communicated with the concentrated water outlet.

According to the utility model discloses electrodialysis membrane stack, clamping device follows the thickness direction centre gripping of membrane stack unit in if the both sides of membrane stack group.

According to the utility model discloses domestic appliance of second aspect embodiment includes: the electrodialysis membrane stack comprises a shell and the electrodialysis membrane stack arranged in the shell, wherein the first electrode and the second electrode are connected with a power supply on the household appliance.

According to the utility model discloses domestic appliance, the last power of usable domestic appliance is the power supply of electrodialysis membrane stack, realizes softening the quality of water of the inside water of domestic appliance.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is one of the schematic structural diagrams of a first electrodialysis membrane stack provided by the embodiment of the present invention;

fig. 2 is a second schematic structural view of a first electrodialysis membrane stack provided by an embodiment of the present invention;

fig. 3 is a schematic view of a second electrodialysis membrane stack according to an embodiment of the present invention;

fig. 4 is a second schematic structural view of a second electrodialysis membrane stack provided by an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a third electrodialysis membrane stack provided by the embodiment of the invention.

Reference numerals:

11: a membrane stack unit; 12: a first insulating spacer; 13: a second insulating spacer; 14: a third insulating spacer; 15: a first splint; 16: a second splint; 101: a first electrode; 102: a second electrode; 111: a cation exchange membrane; 112: an anion exchange membrane; 121: a first grid; 122: a second grid; 123: a third mesh; 141: a first water inlet; 142: a second water inlet; 143: a purified water outlet; 144: and a concentrated water outlet.

Detailed Description

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings and examples. The following examples are provided to illustrate the invention but are not intended to limit the scope of the invention.

In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships 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 specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present invention, it should be noted that, unless explicitly stated or limited otherwise, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the embodiments of the present invention can be understood in specific cases by those skilled in the art.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., 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 an embodiment of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to 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. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

An electrodialysis membrane stack and a dishwasher provided by the embodiment of the invention are described below with reference to fig. 1-5.

As shown in fig. 1 to 5, the present embodiment provides an electrodialysis membrane stack, which includes several membrane stack groups, each membrane stack group includes at least two membrane stack units 11, and the membrane stack units 11 are sequentially connected in series, so that a water body can sequentially flow along the membrane stack units 11 according to the series sequence.

Here, because every membrane stack unit 11 all is equipped with first water inlet, second water inlet, water purification export and dense water export, this embodiment is when the first water inlet intercommunication of the water purification export of former membrane stack unit 11 and the next membrane stack unit 11, still with the second water inlet of former membrane stack unit 11 and the dense water export intercommunication of next membrane stack unit 11 to the realization is established ties a plurality of membrane stack units 11 in proper order.

Further, as shown in fig. 1 to 4, each membrane stack unit 11 of the embodiment of the present application includes a first electrode 101 and a second electrode 102, and the polarities of the first electrode 101 and the second electrode 102 are different. That is, in the case where the first electrode 101 is an anode, the second electrode 102 is a cathode; conversely, when the first electrode 101 is a cathode, the second electrode 102 is an anode.

In each membrane stack group, the first electrodes 101 of the respective membrane stack units 11 are connected to each other, and the second electrodes 102 of the respective membrane stack units 11 are connected to each other.

In practical application, the first electrodes 101 of the membrane stack units 11 can be connected with each other and then connected with the positive electrode of the power supply, the second electrodes 102 of the membrane stack units 11 are connected with each other and then connected with the negative electrode of the power supply, so that the same voltage can be conveniently used for controlling the membrane stack units 11 at the same time, the purification treatment of the water body is realized based on the series water paths formed by the membrane stack units 11, the water purification function which is the same as the high voltage is realized at relatively low voltage, the energy consumption of the membrane stack is reduced, and the performance of the membrane stack is ensured.

It should be noted that, in this embodiment, a plurality of independent power supplies may be used to supply power to each membrane stack group, and it is only necessary to ensure that in each membrane stack group, the first electrodes 101 of the membrane stack units 11 are connected to each other, and the second electrodes 102 of the membrane stack units 11 are connected to each other.

Here, the water body shown in this embodiment is usually seawater, domestic sewage, or industrial wastewater. In order to realize the purification treatment of the water body, it is generally necessary to arrange an ion exchange membrane group between the first electrode 101 and the second electrode 102, wherein the ion exchange membrane group includes a cation exchange membrane 111 and an anion exchange membrane 112. Wherein, each membrane stack unit 11 can be provided with a plurality of electrode groups, and each electrode group comprises a first electrode 101 and a second electrode 102 which are oppositely arranged.

Meanwhile, a plurality of ion exchange membrane groups may be disposed between the first electrode 101 and the second electrode 102 in the present embodiment, however, since the voltage borne by each ion exchange membrane group is constant, in the case that a preset voltage is applied between the first electrode 101 and the second electrode 102, the present embodiment may determine the number of ion exchange membrane groups that can be disposed in each membrane stack unit 11 according to the magnitude of the voltage applied between the first electrode 101 and the second electrode 102, so as to ensure the purification treatment effect of the electrodialysis membrane stack on the water body.

When a plurality of ion exchange membrane groups are provided between the first electrode 101 and the second electrode 102, a plurality of cation exchange membranes 111 and a plurality of anion exchange membranes 112 are provided, respectively, and are alternately provided between the first electrode 101 and the second electrode 102. For example, in the case that two ion exchange membrane groups are disposed between the first electrode 101 and the second electrode 102, the arrangement of the ion exchange membranes between the first electrode 101 and the second electrode 102 may be: cation exchange membrane-anion exchange membrane-cation exchange membrane-anion exchange membrane.

In some embodiments, the present embodiment may be disposed in each film stack group, and the film stack units 11 are sequentially arranged along the thickness direction of the film stack units 11, so that each film stack group shown in the present embodiment is arranged linearly. The thickness direction of the film stack unit 11 is along the arrangement direction of the first electrode and the second electrode in the film stack unit 11.

As shown in fig. 1 to 4, two membrane stack units 11 may be provided for each membrane stack group. Of course, three or more film stack units can be arranged on each film stack group to meet the actual requirements.

In some embodiments, in order to guide the water body to flow between different membrane stack units 11, the present embodiment provides flow guiding openings on the first electrode 101, the second electrode 102, the cation exchange membrane 111 and the anion exchange membrane 112, and provides flow guiding plates between the electrodes and the exchange membranes, and between the cation exchange membrane 111 and the anion exchange membrane 112.

Wherein, the guide plate includes first graticule mesh 121, second graticule mesh 122 and third graticule mesh 123, and one side that cation exchange membrane 111 deviates from anion exchange membrane 112 is located to first graticule mesh 121, and second graticule mesh 122 is located between cation exchange membrane 111 and anion exchange membrane 112, and one side that anion exchange membrane 112 deviates from cation exchange membrane 111 is located to third graticule mesh 123.

In this way, when the first electrode 101 is a cathode and the second electrode 102 is an anode, the first mesh 121 is disposed between the first electrode 101 and the cation exchange membrane 111, the second mesh 122 is disposed between the cation exchange membrane 111 and the anion exchange membrane 112, and the third mesh 123 is disposed between the anion exchange membrane 112 and the second electrode 102.

Correspondingly, in the case that the first electrode 101 is an anode and the second electrode 102 is a cathode, the first mesh 121 is disposed between the first electrode 101 and the anion exchange membrane 112, the second mesh 122 is disposed between the anion exchange membrane 112 and the cation exchange membrane 111, and the third mesh 123 is disposed between the cation exchange membrane 111 and the second electrode 102.

Here, the baffle plate shown in this embodiment has high surfaces and low surfaces which are arranged alternately, the high surfaces are attached to the cation exchange membrane 111 or the anion exchange membrane 112, and the low surfaces form meshes. Therefore, the water flow freely shuttles between the ion exchange membrane and the grid, and the stable and smooth flow of the water flow is ensured. The high surface of the guide plate can play a role in supporting the ion exchange membrane and prevent the ion exchange membrane from deforming.

As shown in fig. 1 to 4, the electrodialysis membrane stack of this embodiment is provided with a first water inlet 141, a second water inlet 142, a purified water outlet 143, and a concentrated water outlet 144.

Based on the arrangement, a first flow passage and a second flow passage are arranged in the electrodialysis membrane stack; the first water inlet 141 is communicated with one end of the first flow passage, and the other end of the first flow passage is communicated with the purified water outlet 143; the second water inlet 142 communicates with one end of the second flow passage, and the other end of the second flow passage communicates with the concentrated water outlet 144.

Thus, when the water body flows into the first flow channel from the first water inlet 141, the ions in the water body selectively permeate the ion exchange membrane under the action of the electric field and enter the second flow channel, so that the purified water flows out from the purified water outlet 143 and the concentrated water flows out from the concentrated water outlet 144.

In some cases, in order to achieve the isolation of the electrodes between two adjacent membrane stack units 11, the electrodialysis membrane stack of the present embodiment is further provided with a first insulating spacer 12, and the first insulating spacer 12 is provided between any two adjacent membrane stack units 11.

Wherein, a water passage is arranged on the first insulating partition plate 12, so that the water body can flow from the former membrane stack unit 11 to the latter membrane stack unit 11 through the first insulating partition plate 12 along the thickness direction of the membrane stack unit 11.

In a specific example, the first electrode 101 is opposite to the second electrode 102 and is disposed on a first side and a second side of the membrane stack unit 11 along the thickness direction; a first insulating spacer 12 is provided between the second side of the preceding membrane stack unit 11 and the first side of the succeeding membrane stack unit 11.

As shown in fig. 1, the electrodialysis membrane stack of this embodiment is provided with two membrane stack units 11, each membrane stack unit 11 is provided with one ion exchange membrane group, a first side surface of a first insulating separator 12 is opposite to a second electrode 102 provided on a second side of the previous membrane stack unit 11, and a second side surface of the first insulating separator 12 is opposite to a first electrode 101 provided on a first side of the next membrane stack unit 11.

So, when the water flowed into the electrodialysis membrane stack from the first water inlet 141, the water would sequentially pass through the diversion port of the first electrode 101 in the previous membrane stack unit 11, the diversion port of the first grid 121, the diversion port of the cation exchange membrane 111, enter the flow channel of the second grid 122 between the cation exchange membrane 111 and the anion exchange membrane 112, perform ion exchange under the effect of the electric field, the treated water sequentially passes through the diversion port of the anion exchange membrane 112, the diversion port of the third grid 123, the diversion port of the second electrode 102, the diversion port of the first insulation partition plate 12, and then enter the next membrane stack unit 11.

Similarly, the water sequentially passes through the first electrode 101, the first grid 121 and the cation exchange membrane 111 in the last membrane stack unit 11, enters a flow channel of the second grid 122 between the cation exchange membrane 111 and the anion exchange membrane 112, performs ion exchange under the action of an electric field, sequentially passes through the anion exchange membrane 112, the third grid 123 and the second electrode 102, and finally outputs the purified fresh water from the purified water outlet 143.

Here, since the process of the water body entering the second flow channel from the second water inlet 142 and obtaining the concentrated water from the concentrated water outlet 144 is opposite to the above-mentioned purification process of the water body, the detailed description is omitted.

As shown in fig. 2, the electrodialysis membrane stack of this embodiment is provided with two membrane stack units 11, each membrane stack unit 11 is provided with one ion exchange membrane group, the first side of the first insulating separator 12 is opposite to the second electrode 102 provided on the second side of the previous membrane stack unit 11, and the second side of the first insulating separator 12 is opposite to the second electrode 102 provided on the first side of the next membrane stack unit 11.

Thus, when the water body flows into the electrodialysis membrane stack from the first water inlet 141, the water body sequentially passes through the flow guide port of the first electrode 101 in the previous membrane stack unit 11, the flow guide port of the first grid 121 and the flow guide port of the cation exchange membrane 111, enters the flow channel of the second grid 122 between the cation exchange membrane 111 and the anion exchange membrane 112, and is subjected to ion exchange under the action of an electric field, and the treated water body sequentially passes through the flow guide port of the anion exchange membrane 112, the flow guide port of the third grid 123, the flow guide port of the second electrode 102 and the flow guide port of the first insulation partition plate 12 and then enters the next membrane stack unit 11.

Similarly, the water in the last membrane stack unit 11 sequentially passes through the second electrode 102, the third grid 123 and the anion exchange membrane 112, enters a flow channel of the second grid 122 between the cation exchange membrane 111 and the anion exchange membrane 112, is subjected to ion exchange under the action of an electric field, sequentially passes through the cation exchange membrane 111, the first grid 121 and the first electrode 101, and finally is output from the purified water outlet 143 to be purified.

Here, since the process of the water body entering the second flow channel from the second water inlet 142 and obtaining the concentrated water from the concentrated water outlet 144 is opposite to the above-mentioned purification process of the water body, the detailed description is omitted.

It should be noted that the electrodialysis membrane stack shown in the present embodiment is not limited to the arrangement of fig. 1 and 2. In practical applications, the polarities of the first electrode 101 and the second electrode 102 can be interchanged. However, in the case where the first electrode 101 is a cathode and the second electrode 102 is an anode, it is ensured that the cation exchange membrane 111 is disposed close to the cathode and the anion exchange membrane 112 is disposed close to the anode.

In some embodiments, to ensure a more compact arrangement of electrodialysis membrane stacks, the membrane stack group of the present embodiment comprises two membrane stack units 11 connected in series.

Wherein the first electrodes 101 of the two membrane stack units 11 are integrally formed, and the second electrodes 102 of the two membrane stack units 11 are respectively disposed at two sides of the integrally formed first electrodes 101.

As shown in fig. 3, the electrodialysis membrane stack shown in this embodiment is specifically provided with one membrane stack group. In this embodiment, the first electrode 101 is specifically set as a cathode, the second electrode 102 is set as an anode, the first electrode 101 is connected to the negative electrode of the power supply, and the second electrodes 102 of the two membrane stack units 11 are connected to the positive electrode of the power supply.

Obviously, the solution shown in fig. 3 of the present embodiment is directed to the case where two anodes are separately provided on both sides of the cathode. When the water body flows into the electrodialysis membrane stack from the first water inlet 141, the water body sequentially passes through the diversion port of the second electrode 102, the diversion port of the third grid 123 and the diversion port of the anion exchange membrane 112 in the previous membrane stack unit 11, enters the flow channel of the second grid 122 between the cation exchange membrane 111 and the anion exchange membrane 112, performs ion exchange under the action of an electric field, and the treated water body sequentially passes through the diversion port of the cation exchange membrane 111, the diversion port of the first grid 121 and the diversion port of the first electrode 101 and then enters the next membrane stack unit 11.

Similarly, the water in the latter membrane stack unit 11 sequentially passes through the first grid 121 and the cation exchange membrane 111, enters the flow channel of the second grid 122 between the cation exchange membrane 111 and the anion exchange membrane 112, undergoes ion exchange under the action of the electric field, sequentially passes through the anion exchange membrane 112, the third grid 123 and the second electrode 102, and finally, is purified and processed to output fresh water from the purified water outlet 143.

As shown in fig. 4, the electrodialysis membrane stack shown in this embodiment is specifically provided with one membrane stack group. In this embodiment, the first electrode 101 is specifically set as an anode, the second electrode 102 is set as a cathode, the first electrode 101 is connected to the positive pole of the power supply, and the second electrodes 102 of the two membrane stack units 11 are connected to the negative pole of the power supply.

Here, the solution shown in fig. 4 of the present embodiment is directed to the case where two cathodes are separately disposed at both sides of the anode. When the water body flows into the electrodialysis membrane stack from the first water inlet 141, the water body sequentially passes through the flow guide port of the second electrode 102, the flow guide port of the first grid 121 and the flow guide port of the cation exchange membrane 111 in the previous membrane stack unit 11, enters the flow channel of the second grid 122 between the cation exchange membrane 111 and the anion exchange membrane 112, is subjected to ion exchange under the action of an electric field, and then sequentially passes through the flow guide port of the anion exchange membrane 112, the flow guide port of the third grid 123 and the flow guide port of the first electrode 101, and then enters the next membrane stack unit 11.

Similarly, the water in the last membrane stack unit 11 sequentially passes through the third grid 123 and the anion exchange membrane 112, enters the flow channel of the second grid 122 between the cation exchange membrane 111 and the anion exchange membrane 112, is subjected to ion exchange under the action of the electric field, sequentially passes through the cation exchange membrane 111, the first grid 121 and the second electrode 102, and finally is output from the purified water outlet 143.

Here, regarding the electrodialysis membrane stack shown in fig. 3 and 4, since the process of the water body entering the second flow channel from the second water inlet 142 and obtaining the concentrated water from the concentrated water outlet 144 is opposite to the above-mentioned purification process for the water body, the description thereof is omitted.

In some embodiments, in order to further reduce energy consumption and ensure the water purification performance of the electrodialysis membrane stack, the present embodiment may further provide that each membrane stack group is connected in series in sequence; the first electrodes of the respective membrane stack groups are connected to each other, and the second electrodes of the respective membrane stack groups are connected to each other.

Here, each membrane stack group in this embodiment may be arranged discretely, or may be arranged along a straight line, and the specific arrangement form is not particularly limited.

In one specific example, the membrane stack groups may be arranged in sequence along the thickness direction of the membrane stack unit, so that the electrodialysis membrane stack arrangement shown in this embodiment is linear.

In another specific example, as shown in fig. 5, the film stack groups may be arranged in sequence along a first direction, and the first direction is perpendicular to the thickness direction of the film stack unit.

Specifically, while the purified water outlet 143 of the previous second membrane stack group is communicated with the first water inlet 141 of the next second membrane stack group through the adapter pipe, the second water inlet 142 of the previous second membrane stack group is communicated with the concentrated water outlet 144 of the next second membrane stack group through the adapter pipe, so as to sequentially connect the plurality of second membrane stack groups in series.

Here, compared with the scheme that each membrane stack group is sequentially arranged along the thickness direction of the membrane stack unit, the length of the electrodialysis membrane stack arrangement can be effectively reduced by sequentially arranging each membrane stack group along the first direction in the present embodiment.

Based on the solution of the above embodiment, as shown in fig. 1 to 5, the electrodialysis membrane stack of this embodiment further includes a clamping device, and the clamping device clamps both sides of all membrane stack groups along the thickness direction of the membrane stack unit 11.

Wherein, clamping device includes first splint 15, second splint 16 and retaining member, and first splint 15 is located the first side of electrodialysis membrane stack along the thickness direction of membrane stack unit 11, and second splint 16 is located the second side of electrodialysis membrane stack along the thickness direction of membrane stack unit 11, and the retaining member is suitable for and tightly fixes first splint 15 and second splint 16 as an organic whole along the thickness direction of membrane stack unit 11. The retaining member is preferably a retaining screw as is known in the art.

In order to achieve a better electrical isolation, the electrodialysis stack shown in this embodiment is further provided with a second insulating spacer 13 and a third insulating spacer 14, the second insulating spacer 13 being arranged between the first clamping plate 15 and the first side of the electrodialysis stack, and the third insulating spacer 14 being arranged between the second clamping plate 16 and the second side of the electrodialysis stack.

The first insulating spacer 12, the second insulating spacer 13, and the third insulating spacer 14 shown in this embodiment may be rubber plates known in the art.

Preferably, the present embodiment also provides a home appliance, including: the electrodialysis membrane stack comprises a shell and the electrodialysis membrane stack arranged in the shell, wherein the first electrode and the second electrode are connected with a power supply on a household appliance.

Here, based on the optimized design of the foregoing embodiment on the electrodialysis membrane stack, the present embodiment can utilize the power supply on the household appliance to supply power to the electrodialysis membrane stack, so as to achieve the same water purification function as the high voltage at a relatively low voltage, and thus soften the water quality inside the household appliance.

The household appliances can be dishwashers, washing machines, water dispensers and the like which are known in the art.

Further, in case that the household appliance is a dishwasher, the dishwasher of the present embodiment further comprises a water tank and a liner assembly; the water tank, the inner container assembly and the electrodialysis membrane stack are respectively arranged in the shell, the electrodialysis membrane stack is connected with the water tank, and the water tank is used for supplying water into the inner container assembly.

In practical application, the electrodialysis membrane stack can be arranged at the bottom of the shell, and the water tank is arranged on the upper side of the electrodialysis membrane stack. The first water inlet and/or the second water inlet of the electrodialysis membrane stack are/is communicated with the water tank, and the purified water outlet of the electrodialysis membrane stack is communicated with the water tank through a water pump so as to purify the water in the water tank by utilizing the electrodialysis membrane stack. Simultaneously, this embodiment also can be connected the water tank through water pump and inner bag subassembly to realize supplying water in to the inner bag subassembly.

The electrodialysis membrane stack shown in the embodiment is preferably a reverse electrodialysis membrane stack, so that in practical application, by changing the voltage direction of the electrode, the scaling of the ion exchange membrane and the working electrode inside the reverse electrodialysis membrane stack can be effectively prevented, the service life is prolonged, and the washing performance of the dishwasher is ensured.

The above embodiments are only for illustrating the present invention, and are not to be construed as limiting the present invention. Although the present invention has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications or equivalent substitutions may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and all of them should be covered by the scope of the claims of the present invention.

Claims (11)

1. An electrodialysis membrane stack, comprising:

if the membrane stack groups are dry, each membrane stack group comprises at least two membrane stack units, and the membrane stack units are sequentially connected in series; each membrane stack unit comprises a first electrode and a second electrode, and the polarities of the first electrode and the second electrode are different;

in each of the membrane stack groups, the first electrodes of the respective membrane stack units are connected to each other, and the second electrodes of the respective membrane stack units are connected to each other.

2. Electrodialysis membrane stack according to claim 1,

in each membrane stack group, the membrane stack units are sequentially arranged along the thickness direction of the membrane stack units.

3. Electrodialysis membrane stack according to claim 2, further comprising:

the first insulating partition plate is arranged between any two adjacent membrane stack units;

wherein, the water body can flow from the former membrane stack unit to the latter membrane stack unit through the first insulation partition plate along the thickness direction.

4. Electrodialysis membrane stack according to claim 3, further comprising:

the first electrode is opposite to the second electrode and is respectively arranged on two sides of the film stack unit along the thickness direction.

5. Electrodialysis membrane stack according to claim 2,

the membrane stack group comprises two membrane stack units which are connected in series;

the first electrodes of the two membrane stack units are constructed into a whole, and the second electrodes of the two membrane stack units are respectively arranged on two sides of the first electrodes constructed into a whole.

6. Electrodialysis membrane stack according to claim 2,

all the membrane stack groups are connected in series in sequence; the first electrodes of the respective membrane stack groups are connected to each other, and the second electrodes of the respective membrane stack groups are connected to each other.

7. Electrodialysis membrane stack according to claim 6,

the membrane stack groups are sequentially arranged along the thickness direction of the membrane stack unit;

or all the membrane stack groups are sequentially arranged along a first direction, and the first direction is vertical to the thickness direction of the membrane stack units.

8. Electrodialysis membrane stack according to any of claims 1 to 7,

the membrane stack unit includes: the ion exchange membrane group comprises a cation exchange membrane and an anion exchange membrane which are oppositely arranged; the ion exchange membrane group is clamped between the first electrode and the second electrode;

the guide plate, the guide plate includes first graticule mesh, second graticule mesh and third graticule mesh, first graticule mesh is located cation exchange membrane deviates from one side of anion exchange membrane, the second graticule mesh is located cation exchange membrane with between the anion exchange membrane, the third graticule mesh is located anion exchange membrane deviates from one side of cation exchange membrane.

9. Electrodialysis membrane stack according to claim 8,

the electrodialysis membrane stack is provided with a first water inlet, a second water inlet, a purified water outlet and a concentrated water outlet;

a first flow channel and a second flow channel are arranged in the electrodialysis membrane stack; the first water inlet is communicated with one end of the first flow passage, and the other end of the first flow passage is communicated with the purified water outlet; the second water inlet is communicated with one end of the second flow channel, and the other end of the second flow channel is communicated with the concentrated water outlet.

10. Electrodialysis membrane stack according to any of claims 1 to 7, further comprising:

and the clamping device is clamped on two sides of the film stack assemblies along the thickness direction of the film stack unit.

11. A household appliance, characterized in that it comprises: a housing and an electrodialysis membrane stack according to any one of claims 1 to 10 disposed in said housing, said first and second electrodes being connected to a power supply on said electrical household appliance.

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