CN213012115U - Water purifier and water purifier - Google Patents

Abstract

The utility model relates to a water purification technology field discloses a purifier and water purifier. The water purifying device comprises: the electrodialysis unit comprises a first water port and a second water port; the first control valve includes a first drain port, a first port, a second port, and a third port; the first port is communicated with the first water port, and the second port is communicated with the second water port; in a first state of the first control valve, the first port is communicated with the first drain port, and the second port is communicated with the third port; in a second state of the first control valve, the first port communicates with the third port and the second port communicates with the first drain port. This purifier can realize the switching of rivers way convenient and fast to prior art compares and can reduce the use quantity of solenoid valve in a large number, has saved the cost, has reduced the risk of leaking, and then improved electrodialysis unit's life and desalination efficiency to the switching of rivers way.

Description

Water purifier and water purifier

Technical Field

The utility model relates to a water purification technology field specifically, relates to a purifier and a water purifier.

Background

Electrodialysers are generally composed of main components such as water distribution plates, ion exchange membranes, electrodes, clamping devices, etc., for example, water distribution plates, anion exchange membranes (negative membranes) and cation exchange membranes (positive membranes) are alternately arranged in sequence between the anode and the cathode to form a multi-layered compartment. Under the action of an external electric field between the anode and the cathode, anions and cations in the aqueous solution entering the compartment can directionally migrate towards the anode and the cathode respectively, and because the anode membrane only allows cations to pass and prevents anions from passing, and the cathode membrane only allows anions to pass and prevents cations from passing (namely if the fixed charge on the ion exchange membrane is opposite to the charge of the ions, the ions can pass, and if the charges of the ions are the same, the ions are repelled), the anions and the cations in the dilute chamber migrate to the adjacent concentrated chamber, so that the salt-containing water is diluted. In the electrodialyzer, the compartment in which the ions in water are enriched is called the concentrated water chamber, and the compartment in which the ions in water are eliminated by electromigration is called the fresh water chamber.

The electrodialyzer can remove various ions in water and effectively reduce the TDS of the water. However, as the electrodialysis proceeds, scale is formed on the ion exchange membrane and the electrode plates, thereby affecting the desalination effect of water. For this reason, in order to improve the service life and desalting effect of the electrodialyser, it is necessary to periodically perform the flow-through and flow-back operations on the electrodialyser. However, in the prior art, a large number of electromagnetic valves and a plurality of water inlet pipelines are needed for the operations, which not only wastes resources and occupies a large space, but also increases the risk of water leakage due to more electromagnetic valves.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a purifier, this purifier can realize the switching of rivers way convenient and fast to prior art compares and can reduce the use quantity of solenoid valve in a large number, has saved the cost, has reduced the risk of leaking, and then has improved electrodialysis unit's life and desalination efficiency to the switching of rivers way.

Therefore, the utility model provides a water purifying device, this water purifying device includes: an electrodialysis unit comprising a first water port and a second water port; a first control valve including a first drain port, a first port, a second port, and a third port; wherein the first port is in communication with the first port and the second port is in communication with the second port; in a first state of the first control valve, the first port is in communication with a first drain port, and the second port is in communication with the third port; in a second state of the first control valve, the first port communicates with the third port and the second port communicates with the first drain port.

In this technical solution, since the first control valve can be switched between the first state in which the first port communicates with the first drain port and the second port communicates with the third port, and the water flow passage in the first state is thus formed with the electrodialysis unit; in the second state, first port and third port intercommunication, second port and first drainage port intercommunication, form the water runner of second state with the electrodialysis unit like this, and the water runner of first state is opposite with the direction of the water runner of second state, therefore, can see out, this purifier can convenient and fast ground realize the switching of water runner, and prior art compares and can reduce the use quantity of solenoid valve in a large number, the cost is saved, the risk of leaking has been reduced, and the switching to water runner has then improved the life and the desalination efficiency of electrodialysis unit.

Further, the third port serves as a first water inlet port, and the first control valve is capable of reversing the flow path of the electrodialysis unit when switching between the first state and the second state.

Further, the first and second water ports are arranged at opposite ends of the electrodialysis unit; alternatively, the first and second water ports are arranged at the same end of the electrodialysis unit.

Further, the electrodialysis unit comprises a third water port and a fourth water port; the water purifying device comprises a second control valve, and the second control valve comprises a second water discharging port, a fourth port, a fifth port and a second water inlet port; the fourth port is in communication with the fourth port and the fifth port is in communication with the third port; wherein the second control valve is switchable between the first state in which the second water inlet port is in communication with a fifth port and the second water outlet port is in communication with the fourth port and the second state; in the second state, the second water inlet port communicates with the fourth port, and the second water outlet port communicates with the fifth port.

Still further, the electrodialysis unit is capable of reversing polarity when the water purification device is switched between the first state and the second state.

Further, one of the first and second drain ports serves as a concentrate drain port, and the other of the first and second drain ports serves as a clean drain port.

Further, each of the first control valve and the second control valve includes a valve body having an inner cavity and a valve plate rotatably disposed in the inner cavity, each port of each control valve is formed on an inner circumferential surface of the inner cavity at an interval along a rotation direction of the valve plate, the valve plate includes port blocking arcs respectively disposed on opposite sides in a radial direction of the valve plate, wherein a circumferential length of the port blocking arc is equal to a circumferential length between adjacent ports and is greater than an axial length of each port, and when the valve plate is between the first state and the second state, the valve plate of each control valve blocks a flow between the ports.

Further, the first and second water ports are arranged at a first end of the electrodialysis unit and the third and fourth water ports are arranged at a second end of the electrodialysis unit, wherein the first and second ends are oppositely arranged.

Further, the first water gap and the second water gap are both used as water outlets; the first water discharge port is used as a clean water discharge port, and the third port is used as a concentrated water discharge port; the electrodialysis unit can be reversed.

Furthermore, the utility model provides a water purifier, the water purifier includes above arbitrary purifier. As mentioned above, the cost of the water purifier is reduced, the purification effect is improved, and the overall quality is effectively improved.

Other features and advantages of the present invention will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic view of a first water purifying device provided in an embodiment of the present invention in a first state;

FIG. 2 is a schematic view of the water purification unit of FIG. 1 in a second state;

fig. 3 is a schematic view of a second water purifying device in a first state according to an embodiment of the present invention;

FIG. 4 is a schematic view of the water purification unit of FIG. 3 in a second state;

fig. 5 is a schematic view of a third water purifying device in a first state according to an embodiment of the present invention;

FIG. 6 is a schematic view of the water purification unit of FIG. 5 in a second state;

fig. 7 is a schematic structural diagram of a first control valve and a second control valve of a water purifying device according to an embodiment of the present invention, wherein the control valves are in an open state;

FIG. 8 is a schematic illustration of the control valve of FIG. 7 in a closed state;

fig. 9 is a schematic view of ionized water of an electrodialysis unit in a water purification apparatus according to an embodiment of the present invention.

Description of the reference numerals

1-electrodialysis unit, 2-first water gap, 3-second water gap, 4-first control valve, 5-first water discharge port, 6-first port, 7-second port, 8-third port, 9-third water gap, 10-fourth water gap, 11-second control valve, 12-second water discharge port, 13-fourth port, 14-fifth port, 15-second water inlet port, 16-valve body, 17-valve plate, 18-port plugging arc plate.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

Fig. 1-6 show three water purifying devices with different structures, but it should be understood that the water purifying device provided by the present invention is not limited to the three water purifying devices shown in fig. 1-6.

Referring to fig. 1-6, the present invention provides a water purifying device comprising an electrodialysis unit 1 and a first control valve 4, wherein the electrodialysis unit 1 comprises a first water gap 2 and a second water gap 3; the first control valve 4 includes a first drain port 5, a first port 6, a second port 7, and a third port 8; wherein the first port 6 is in communication with the first nozzle 2 and the second port 7 is in communication with the second nozzle 3; the first control valve 4 is switchable between a first state in which the first port 6 communicates with the first drain port 5 and the second port 7 communicates with the third port 8, for example, to form a water flow path indicated by an arrow in fig. 1, and a second state in which the first port 6 communicates with the third port 8 and the second port 7 communicates with the first drain port 5, for example, to form a water flow path indicated by an arrow in fig. 2, of the first control valve 4.

In this water purification apparatus, since the first control valve 4 can be switched between the first state in which the first port 6 is communicated with the first drain port 5 and the second port 7 is communicated with the third port 8, and the water flow path of the first state, as indicated by the arrow in fig. 1, is formed with the electrodialysis unit 1; in the second state, the first port 6 is communicated with the third port 8, the second port 7 is communicated with the first water discharge port 5, thus forming a water flow channel in the second state with the electrodialysis unit, such as the water flow channel shown by the arrow in fig. 2, and the direction of the water flow channel in the first state is opposite to that of the water flow channel in the second state, therefore, it can be seen that the water purifying device can conveniently and quickly realize water flow channel switching, and compared with the prior art, the use number of electromagnetic valves can be greatly reduced, the cost is saved, the risk of water leakage is reduced, and the service life and the desalination efficiency of the electrodialysis unit are improved by switching the water flow channel.

When the water purifying device is purified by flowing through the electrodialysis unit 1 through the water flow channel in the first state, scales extending along the water flowing direction (the first flowing direction) are formed in the electrodialysis unit 1 along with the use of the electrodialysis unit 1, and when the water purifying device is purified by flowing through the electrodialysis unit 1 through the water flow channel in the second state, the flowing direction of the water flow is opposite to the extending direction of the scales, so that the scales are continuously washed by the water flow in the second state, the scales are stripped and shed, the scales are prevented from being formed in the electrodialysis unit 1, and the service life of the electrodialysis unit and the desalting efficiency are improved.

Several structures of the water purifying apparatus will be described in detail below. As shown in fig. 1 and 2, in a first structure of the water purifying apparatus, the third port 8 is used as a first water inlet port, the first control valve 4 can make a flow path of the electrodialysis unit 1 reverse flow when switching between a first state and a second state, in the first state of fig. 1, raw water or water to be purified (such as tap water) enters from the third port 8, flows out from the second port 7, enters into the electrodialysis unit 1 through the second water gap 3 for ionization purification, the electrodialysis unit 1 purifies the entering water into pure water and concentrated water, wherein one of the pure water and the concentrated water can flow out from the first water gap 2, enter into the first control valve 4 again through the first port 6, and then flow out from the first water outlet port 5, and the other of the pure water and the concentrated water can flow out from the other water outlet of the electrodialysis unit 1. In the second state of fig. 2, raw water or water to be purified (e.g. tap water) enters from the third port 8, flows out from the first port 6, enters into the electrodialysis unit 1 through the first water gap 2 for ionization purification, and the electrodialysis unit 1 purifies the entering water into purified water and concentrated water, wherein one of the purified water and the concentrated water can flow out from the second water gap 3, enter into the first control valve 4 again through the second port 7, and then flow out from the first water discharge port 5, and the other of the purified water and the concentrated water can flow out from the other water discharge ports of the electrodialysis unit 1. It can be seen that in the water purification apparatus shown in fig. 1 and 2, scales in the electrodialysis unit 1 can be peeled off by the backflow, so that scales are prevented from being formed in the electrodialysis unit 1, and the service life of the electrodialysis unit and the desalination efficiency are improved. Meanwhile, the concentrated water and the purified water discharge port of the water purifying device are kept unchanged.

Of course, the first and second water openings 2, 3 may be arranged at any position of the electrodialysis unit 1. For example, in fig. 1 and 2, the first and second water ports 2, 3 may be arranged at opposite ends of the electrodialysis unit 1; alternatively, the first and second water openings 2, 3 are arranged at the same end of the electrodialysis unit 1.

When the first and second water ports 2, 3 are arranged at the same end of the electrodialysis unit 1, the same end of the electrodialysis unit 1 can be either the water inlet end of the electrodialysis unit 1 or the water outlet end of the electrodialysis unit 1. For example, in the second water purification apparatus shown in fig. 3 and 4, the first water gap 2 and the second water gap 3 are both used as water outlets and located at the same end, and in this case, the first water discharge port 5 is used as a clean water discharge port, and the third port 8 is used as a concentrated water discharge port; and the electrodialysis unit 1 can be reversed. For example in fig. 3, the electrodialysis unit 1 ionizes and purifies incoming water into clean water flowing from the first water opening 2, through the first port 6 into the first control valve 4, and then from the first water discharge port 5, and concentrate flowing from the second water opening 3, through the second port 7 into the first control valve 4, and then from the third port 8. After the electrodialysis unit 1 is reversed, since the concentrate and fresh water chambers in the electrodialysis unit 1 are changed, the first control valve 4 will accordingly be switched from the first state shown in fig. 3 to the second state shown in fig. 4, the electrodialysis unit 1 ionizes and purifies the incoming water into purified water and concentrated water, the purified water flows out from the second water opening 3, enters the first control valve 4 through the second port 7, and then flows out from the first drain port 5, and the concentrated water flows out from the first water opening 2, enters the first control valve 4 through the first port 6, and then flows out from the third port 8. It can be seen that by inverting the electrodes of the electrodialysis unit 1, scaling in the electrodialysis unit 1 can be avoided due to the change of the water path, which will improve the service life and desalination efficiency of the electrodialysis unit. Meanwhile, the concentrated water and the purified water discharge port of the water purifying device can be kept unchanged through the first control valve 4.

In a third water purification device shown in fig. 5 and 6, the electrodialysis unit 1 comprises a third water port 9 and a fourth water port 10; the water purifying device comprises a second control valve 11, wherein the second control valve 11 comprises a second water discharging port 12, a fourth port 13, a fifth port 14 and a second water inlet port 15; the fourth port 13 is communicated with the fourth water port 10, and the fifth port 14 is communicated with the third water port 9; wherein the second control valve 11 is switchable between a first state in which the second water inlet port 15 and the fifth port 14 are communicated and the second water outlet port 12 and the fourth port 13 are communicated; in the second state, the second water inlet port 15 and the fourth port 13 communicate with each other, and the second water outlet port 12 and the fifth port 14 communicate with each other. Thus, as shown in fig. 5 and 6, the first control valve 4 and the second control valve 11 can conveniently change the water flow passages in the first state and the second state, and can avoid scale formation in the electrodialysis unit 1, which can improve the service life and desalination efficiency of the electrodialysis unit.

For example, in fig. 5, two paths of water to be purified respectively flow into respective control valves from the third port 8 and the second water inlet port 15, and then respectively enter the electrodialysis unit 1 along the arrow direction, the purified water can be respectively discharged from the first water discharge port 5 and the second water discharge port 12, and the concentrated water can be discharged from other discharge ports of the electrodialysis unit 1. In the second state of fig. 6, after flowing back, the two paths of water to be purified respectively flow into the respective control valves from the third port 8 and the second water inlet port 15, and then respectively enter the electrodialysis unit 1 along the arrow direction, the purified water can be discharged from the first water outlet port 5 and the second water outlet port 12, and the concentrated water can be discharged from other discharge ports of the electrodialysis unit 1, so that it can be seen that scale formation in the electrodialysis unit 1 can be avoided by flowing back, which will improve the service life and desalination efficiency of the electrodialysis unit, and meanwhile, the purified water outlet of the water purifying device can be kept unchanged.

Of course, in the above description, the first and second water discharge ports 5 and 12 are provided as the purified water discharge ports, but of course, the first and second water discharge ports 5 and 12 may be provided as the concentrated water discharge ports, and in this case, the purified water is discharged from the other discharge ports of the electrodialysis unit 1.

Alternatively, the third water purification device may be reversed and reversed simultaneously, i.e. the electrodialysis unit 1 is capable of reversing polarity when the water purification device is switched between the first and second states. At this time, the first drain port 5 may serve as a concentrate drain port, and the second drain port 12 may serve as a clean drain port. Thus, in fig. 5, two paths of water to be purified respectively flow into the respective control valves from the third port 8 and the second water inlet port 15, and then respectively enter the electrodialysis unit 1 along the arrow direction to be ionized into pure water and concentrated water, the purified pure water can be discharged from the second water outlet port 12, the concentrated water can be discharged from the first water outlet port 5, after the electrodialysis unit 1 shown in fig. 9 is reversed and the first control valve and the second control valve change states to be reversed, as shown in fig. 6, the two paths of water to be purified respectively flow into the respective control valves from the third port 8 and the second water inlet port 15, and then respectively enter the electrodialysis unit 1 along the arrow direction to be ionized into pure water and concentrated water, at this time, because the water path is changed and reversed, the purified pure water can still flow out from the second water outlet port 12, and the concentrated water can still flow out from the first water outlet port 5, it can be seen that by means of the reverse flow and the reverse polarity, scale formation in the electrodialysis unit 1 can be avoided, which will improve the service life and desalination efficiency of the electrodialysis unit, while at the same time it can be ensured that the purified water outlet and the concentrated water outlet of the water purification device remain unchanged.

Of course, one of the first and second drain ports 5 and 12 serves as a concentrate drain port, and the other of the first and second drain ports 5 and 12 serves as a clean water drain port. That is, the first drain port 5 may serve as a pure water drain port, and the second drain port 12 serves as a concentrated water drain port, so that concentrated water and a pure water outlet of the water purifying apparatus may be more flexibly set.

In addition, the first and second water gaps 2 and 3 and the third and fourth water gaps 9 and 10 of the electrodialysis unit 1 may be arranged at any positions as long as it can satisfy the intake of raw water and the discharge of purified water and concentrated water, for example, in fig. 5 and 6, the first and second water gaps 2 and 3 are arranged at a first end of the electrodialysis unit 1, and the third and fourth water gaps 9 and 10 are arranged at a second end of the electrodialysis unit 1, wherein the first and second ends are oppositely arranged.

In addition, the utility model discloses a purifier can also include other types, for example, can take off the second control valve 11 of the purifier of fig. 5 and fig. 6, and at this moment, fig. 5 and fig. 6 will realize with fig. 1 and fig. 2 type's refluence, and this kind of refluence also can avoid forming the scale deposit in the electrodialysis unit 1, and this will improve the life and the desalination efficiency of electrodialysis unit, can ensure simultaneously that this purifier's pure water export and dense water export remain unchanged.

Of course, both the first nozzle 2 and the second nozzle 3 serve as water outlets; the first water discharge port 5 is used as a clean water discharge port, and the third port 8 is used as a concentrated water discharge port; the electrodialysis unit 1 can be reversed. As shown in fig. 3 and 4. The discharge of the clean water and the concentrate from the electrodialysis unit 1 before and after the inversion can be referred to as described above.

Furthermore, in the water purifying apparatus of the present invention, the first control valve 4 or the first control valve 4 and the second control valve 11 may have a plurality of structural forms, but any structural form may be adopted as long as the communication of each of the above ports can be realized when the switching between the first state and the second state is possible.

For example, in one form of construction, referring to fig. 7 and 8, each of the first control valve 4 and the second control valve 11 includes a valve body 16 having an inner cavity and a valve plate 17 rotatably disposed in the inner cavity, respective ports of each control valve being formed at intervals on an inner peripheral surface of the inner cavity along a rotational direction of the valve plate, the valve plate 17 including port blocking arcs 18 respectively disposed on opposite sides in a radial direction of the valve plate, wherein a circumferential length of the port blocking arcs 18 is equal to a circumferential length between adjacent ports and is greater than an axial length of each port, and wherein the valve plate 17 of each control valve interrupts flow between the respective ports when the valve plate 17 is between a first state and a second state. Thus, in fig. 7, the valve plate 17 is in an open state communicating the corresponding port, and the valve plate 17 in fig. 7 can be rotated to another open position shown by a broken line, thereby achieving switching between the above-described first state and second state. When the control valve needs to be closed, as shown in fig. 8, the valve plate 17 is rotated to enable the port blocking arc-shaped plate 18 to block the ports corresponding to the two ends, and at this time, due to the blocking of the valve plate 17, the flow between the ports is cut off to be closed.

Of course, the valve plate 17 may be plural and connected together and be rotatable about the same rotational axis, depending on the number of ports of the control valve.

In addition, the switching between the first state and the second state of the water purification apparatus may be switched after a predetermined time, or the switching between the first state and the second state may be controlled according to a change in the content of total dissolved solids in the water passing through the electrodialysis unit, that is, the control of the reverse flow and/or the polarity inversion. Because can adopt TDS detecting element to detect the water through the electrodialysis unit, like this, can accurately obtain the TDS (total dissolved solids)'s of outlet water content change in real time, and this kind of content change then can real-time reaction electrodialysis unit in the scale deposit condition of ion exchange membrane and electrode board to can control the switching of first state and second state according to the content change of TDS (total dissolved solids).

Furthermore, the water purification device may be applied to any water using device such as a water heater or dishwasher or a whole house water system or water purifier.

Finally, the utility model provides a water purifier, this water purifier include above arbitrary purifier.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the details of the above embodiments, and the technical concept of the present invention can be within the scope of the present invention to perform various simple modifications to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations.

In addition, various embodiments of the present invention can be combined arbitrarily, and the disclosed content should be regarded as the present invention as long as it does not violate the idea of the present invention.

Claims (10)

1. A water purification device, characterized by comprising:

an electrodialysis unit (1), the electrodialysis unit (1) comprising a first water opening (2) and a second water opening (3);

a first control valve (4), the first control valve (4) comprising a first drain port (5), a first port (6), a second port (7), and a third port (8);

wherein the content of the first and second substances,

the first port (6) communicates with the first nozzle (2) and the second port (7) communicates with the second nozzle (3);

in a first state of the first control valve (4), the first port (6) and the first drain port (5) are in communication, and the second port (7) and the third port (8) are in communication;

in a second state of the first control valve (4), the first port (6) and the third port (8) are in communication, and the second port (7) and the first drain port (5) are in communication.

2. A water purification apparatus according to claim 1, wherein the third port (8) is a first water inlet port, and the first control valve (4) is capable of reversing the flow path of the electrodialysis cell (1) when switching between the first state and the second state.

3. Water purification apparatus according to claim 2, wherein the first water port (2) and the second water port (3) are arranged at opposite ends of the electrodialysis unit (1);

alternatively, the first and second electrodes may be,

the first water port (2) and the second water port (3) are arranged at the same end of the electrodialysis unit (1).

4. Water purification apparatus according to claim 2, wherein the electrodialysis unit (1) comprises a third water port (9) and a fourth water port (10);

the water purification device comprises a second control valve (11), wherein the second control valve (11) comprises a second water discharge port (12), a fourth port (13), a fifth port (14) and a second water inlet port (15);

said fourth port (13) being in communication with said fourth nozzle (10), said fifth port (14) being in communication with said third nozzle (9);

wherein the second control valve (11) is switchable between the first state in which the second water inlet port (15) and the fifth port (14) are in communication, and the second water outlet port (12) and the fourth port (13) are in communication; in the second state, the second water inlet port (15) and the fourth port (13) are communicated, and the second water outlet port (12) and the fifth port (14) are communicated.

5. Water purification apparatus according to claim 4, wherein the electrodialysis cell (1) is capable of reversing polarity when the water purification apparatus is switched between the first state and the second state.

6. The water purifying device according to claim 4, wherein one of the first and second drain ports (5, 12) is a concentrate drain port, and the other of the first and second drain ports (5, 12) is a clean drain port.

7. The water purification apparatus according to claim 4, wherein the first control valve (4) and the second control valve (11) each include a valve body (16) having an inner cavity and a valve plate (17) rotatably disposed in the inner cavity, respective ports of each control valve being formed at intervals on an inner peripheral surface of the inner cavity along a rotation direction of the valve plate, the valve plate (17) including port blocking arcs (18) respectively disposed on opposite sides in a radial direction of the valve plate, wherein a circumferential length of the port blocking arc (18) is equal to a circumferential length between adjacent ports and is greater than an axial length of each port, and wherein the valve plate (17) of each control valve interrupts flow between the respective ports when the valve plate (17) is between the first state and the second state.

8. Water purification apparatus according to any one of claims 4-7, wherein the first and second water openings (2, 3) are arranged at a first end of the electrodialysis unit (1) and the third and fourth water openings (9, 10) are arranged at a second end of the electrodialysis unit (1), wherein the first and second ends are arranged opposite each other.

9. Water purification apparatus according to claim 1, wherein the first water gap (2) and the second water gap (3) both act as water outlets;

the first water discharge port (5) is used as a clean water discharge port, and the third port (8) is used as a concentrated water discharge port;

the electrodialysis unit (1) can be reversed.

10. A water purifier characterized by comprising the water purifying apparatus according to any one of claims 1 to 9.

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