Electrodialysis water purifier

Abstract

The utility model discloses an electrodialysis water purifier, and relates to the technical field of water purifiers, the electrodialysis water purifier comprises a water inlet pipeline, a first electrodialysis module, a pure water pipeline and a waste water pipeline, the water outlet end of the water inlet pipeline is communicated with the water inlet end of the first electrodialysis module; the water inlet end of the pure water pipeline is communicated with the water outlet end of the first electrodialysis module, and the water inlet end of the wastewater pipeline is communicated with the water outlet end of the first electrodialysis module. According to the utility model, the advantage that the desalination rate can be adjusted by adjusting the working voltage through electrodialysis is utilized, so that pure water flowing through the first electrodialysis module can be adjusted into water with different mineral contents, and when pure water with high mineral content is needed, part of mineral elements in raw water can be retained by reducing the desalination rate of the electrodialysis module; and pure water containing a certain amount of mineral substances flows out of the water purifier.

Description

Technical Field

[0001] The utility model relates to the technical field of water purifiers, in particular to an electrodialysis water purifier. Background Art

[0002] With the improvement of people's living standards, people pay more and more attention to water quality and hygiene, and it has become a trend for families to be equipped with water purification equipment; existing water purification equipment can conveniently produce pure water for drinking, but the quality of its effluent water is relatively single and cannot meet the diverse needs of users. Users have different water quality requirements for the following situations:

[0003] 1. For making tea, cooking porridge, boiling soup, making coffee, etc., a certain amount of calcium, magnesium and other minerals are required.

[0004] 2. The mineral content in the effluent of a conventional RO water purifier is extremely low. Summary of the Utility Model

[0005] The purpose of the utility model is to provide an electrodialysis water purifier to solve the technical problem that the pure water quality produced by existing water purification equipment is relatively single and cannot meet the diverse needs of users.

[0006] The utility model provides an electrodialysis water purifier, which includes a water inlet pipeline, a first electrodialysis module, a pure water pipeline and a waste water pipeline. The water outlet end of the water inlet pipeline is communicated with the water inlet end of the first electrodialysis module, the water inlet end of the pure water pipeline is communicated with the water outlet end of the first electrodialysis module, and the water inlet end of the waste water pipeline is communicated with the water outlet end of the first electrodialysis module.

[0007] For the electrodialysis water purifier as described above, the water inlet pipeline includes a first pipeline, a pre-filter and a first waterway switch. The pre-filter and the first waterway switch are sequentially arranged on the first pipeline, and the water outlet end of the first pipeline is connected to the water inlet end of the first electrodialysis module.

[0008] For the electrodialysis water purifier as described above, the pure water pipeline includes a second pipeline and a water outlet switch. The water outlet switch is arranged on the second pipeline, and the water inlet end of the second pipeline is connected to the water outlet end of the first electrodialysis module.

[0009] For the electrodialysis water purifier as described above, the waste water pipeline includes a third pipeline, a check valve and a second waterway switch. The second waterway switch and the check valve are sequentially arranged on the third pipeline. A first branch port is provided on the second pipeline, and the first branch port is located before the water outlet switch. The water inlet end of the third pipeline is connected to the first branch port.

[0010] For the electrodialysis water purifier as described above, the water inlet pipeline further includes a flow regulating device, and the flow regulating device is arranged on the first pipeline.

[0011] The electrodialysis water purifier as described above further includes a first flushing pipeline. A second branch port is provided on the second pipeline. The second branch port is located after the first branch port and before the water outlet switch. A third branch port is provided on the waste water pipeline. The third branch port is located after the second waterway switch and before the check valve. The pure water pipeline further includes a first post-filter. The first post-filter is arranged on the second pipeline. The first post-filter is located after the first branch port and before the second branch port. One end of the first flushing pipeline is connected to the second branch port, and the other end is connected to the third branch port.

[0012] The electrodialysis water purifier as described above further includes a second electrodialysis module and a third waterway switch. A fourth branch port is provided on the first pipeline. The fourth branch port is located after the pre-filter and before the first waterway switch. The fourth branch port diverts the first pipeline to form a first branch pipeline. The third waterway switch and the second electrodialysis module are sequentially arranged on the first branch pipeline. The end of the first branch pipeline is connected to the first branch port.

[0013] The electrodialysis water purifier as described above further includes a second flushing pipeline. The pure water pipeline further includes a second post-filter. The second post-filter is arranged on the second pipeline. One end of the second flushing pipeline is communicated with the waste water pipeline, and the other end is communicated with the water outlet end of the second post-filter.

[0014] The pre-filter and the second post-filter of the electrodialysis water purifier as described above are combined to form a composite filter.

[0015] The electrodialysis water purifier as described above further includes a second branch pipe, a second electrodialysis module, and a third water path switch. The second electrodialysis module is disposed on the third pipe and is located before the second water path switch. A fourth branch port is provided on the first pipe, which is located before the first water path switch and after the pre-filter. The fourth branch port diverts the first pipe to form a first branch pipe. The third water path switch is disposed on the first branch pipe. A fifth branch port and a sixth branch port are provided on the third pipe. The fifth branch port is located after the second electrodialysis module and before the second water path switch. The sixth branch port is located after the second water path switch and before the check valve. The end of the first branch pipe is connected to the fifth branch port. A seventh branch port is provided on the first pipe, which is located after the first water path switch and before the first electrodialysis module. One end of the second branch pipe is connected to the sixth branch port, and the other end is connected to the seventh branch port. A fourth water path switch is provided on the second branch pipe.

[0016] Implementing the embodiments of the present invention will have the following beneficial effects:

[0017] In the present invention, a water inlet pipeline, a first electrodialysis module, a pure water pipeline, and a wastewater pipeline are provided. The water outlet end of the water inlet pipeline is communicated with the water inlet end of the first electrodialysis module. The water inlet end of the pure water pipeline is communicated with the water outlet end of the first electrodialysis module. The water inlet end of the wastewater pipeline is communicated with the water outlet end of the first electrodialysis module. By utilizing the advantage that the desalination rate can be adjusted by adjusting the working voltage of the electrodialysis, the pure water flowing through the first electrodialysis module can be adjusted to water with different mineral contents. When pure water with a relatively high mineral content is required, the desalination rate of the electrodialysis module is reduced, so that some mineral elements in the raw water can be retained, and the pure water flowing out of the water purifier contains a certain amount of minerals. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 is a schematic diagram of the water path structure of the electrodialysis water purifier shown in Example 1;

[0020] Figure 2 is a schematic diagram of the water path structure of the electrodialysis water purifier shown in Example 2;

[0021] Figure 3 It is a schematic diagram of the water circuit structure of the electrodialysis water purifier shown in Embodiment 3;

[0022] Figure 4 It is a schematic diagram of the water circuit structure of the electrodialysis water purifier shown in Embodiment 4;

[0023] Figure 5 It is a schematic diagram of the water circuit structure of the electrodialysis water purifier shown in Embodiment 5.

[0024] Wherein: 1. First pipeline; 11. Pre-filter element; 12. First water circuit switch; 13. Flow regulating device; 14. Fourth branch port; 15. First branch pipeline; 16. Third water circuit switch; 17. Seventh branch port; 2. First electrodialysis module; 3. Second pipeline; 31. Water outlet switch; 32. First branch port; 33. Second branch port; 34. First post-filter element; 35. Second post-filter element; 4. Third pipeline; 41. Second water circuit switch; 42. Check valve; 43. Third branch port; 44. Fifth branch port; 45. Sixth branch port; 5. First flushing pipeline; 6. Second electrodialysis module; 7. Second flushing pipeline; 8. Second branch pipeline; 81. Fourth water circuit switch. Detailed implementation manners

[0025] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0026] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality of" means two or more, unless otherwise specifically defined.

[0028] In the present utility model, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0030] Embodiment 1:

[0031] Refer to Figure 1 , the present utility model provides an electrodialysis water purifier, which includes a water inlet pipeline, a first electrodialysis module 2, a pure water pipeline, and a wastewater pipeline. The water outlet end of the water inlet pipeline is communicated with the water inlet end of the first electrodialysis module 2, the water inlet end of the pure water pipeline is communicated with the water outlet end of the first electrodialysis module 2, and the water inlet end of the wastewater pipeline is communicated with the water outlet end of the first electrodialysis module 2. By utilizing the advantage that the desalination rate can be adjusted by adjusting the working voltage of the electrodialysis, the pure water flowing through the first electrodialysis module 2 can be adjusted to water with different mineral contents. When pure water with a relatively high mineral content is required, the desalination rate of the electrodialysis module is reduced, so that some mineral elements in the raw water can be retained, and the water purifier can discharge pure water containing a certain amount of minerals.

[0032] Specifically, electrodialysis involves a selectively permeable membrane and electrodes. The principle is that a solution flows through an electrodialysis module. Under the action of an electric field, charged solute particles (such as ions) in the solution migrate through the membrane and pass through the selectively permeable membrane to achieve purification and separation of substances. It should be understood that the selectively permeable membrane includes an anion membrane and a cation membrane. The anion membrane can only adsorb or allow anions to pass through the membrane, and the cation membrane can only adsorb or allow cations to pass through the membrane; the electrodes include a cathode and an anode, and the main function of the electrodes is to form an electric field to drive the ions in the water to migrate in a preset direction. During the operation of the electrodialysis module, the electric field strength is adjusted by adjusting the input voltage, so that the desalination rate of the electrodialysis process can be adjusted to adjust the mineral content of the water flowing through the electrodialysis module.

[0033] Further, the water inlet pipeline includes a first pipeline 1, a pre-filter element 11, and a first waterway switch 12. The pre-filter element 11 and the first waterway switch 12 are sequentially arranged on the first pipeline 1, and the water outlet end of the first pipeline 1 is connected to the water inlet end of the first electrodialysis module 2. The pre-filter element 11 mainly includes filter materials such as PP cotton, folded paper PP, non-woven fabric, and activated carbon. Its function is to pre-filter the raw water in the water inlet pipeline to remove impurities such as sediment, rust, and residual chlorine in the water. The pre-filtered water then flows into the electrodialysis module, and the water quality is further processed and purified for drinking by using the principle of electrodialysis of the electrodialysis module.

[0034] Further, the pure water pipeline includes a second pipeline 3 and a water outlet switch 31. The water outlet switch 31 is arranged on the second pipeline 3, and the water inlet end of the second pipeline 3 is connected to the water outlet end of the first electrodialysis module 2.

[0035] Further, the wastewater pipeline includes a third pipeline 4, a check valve 42, and a second waterway switch 41. The second waterway switch 41 and the check valve 42 are sequentially arranged on the third pipeline 4. A first branch port 32 is provided on the second pipeline 3, and the first branch port 32 is located before the water outlet switch 31. The water inlet end of the third pipeline 4 is connected to the first branch port 32.

[0036] When the electrodialysis water purifier is in the pure water output mode, the first waterway switch 12 and the water outlet switch 31 are opened, the second waterway switch 41 is closed, the first electrodialysis module 2 is opened, the water pretreated by the pre-filter element 11 flows into the first electrodialysis module 2, and the water further processed by the first electrodialysis module 2 flows out from the drinking water outlet through the pure water pipeline.

[0037] It should be understood that bipolar membrane electrodialysis is a type of electrodialysis, which is characterized by combining an anion exchange membrane and a cation exchange membrane to form a bipolar membrane, while eliminating the concentrated water chamber. When treating water by bipolar membrane electrodialysis, ions in the water will adsorb onto the bipolar membrane. After the bipolar membrane has adsorbed to a certain extent, it needs to be regenerated to restore its adsorption capacity. When the first electrodialysis module 2 needs to be regenerated, the first waterway switch 12 and the second waterway switch 41 are opened, the water outlet switch 31 is closed, and the first electrodialysis module 2 is opened and the electrodes are reversed (the anode and cathode are exchanged), so that the first electrodialysis module 2 enters the regeneration state. The water pretreated by the pre-filter 11 flows into the first electrodialysis module 2. After the electrodialysis regeneration, the concentrated water is discharged from the concentrated water outlet through the waste water pipeline.

[0038] Embodiment 2:

[0039] See Figure 2 , compared with Embodiment 1, the difference in Embodiment 2 is that the water inlet pipeline further includes a flow regulating device 13, and the flow regulating device 13 is arranged on the first pipeline 1. The flow regulating device 13 can adjust the inlet water flow rate of the first electrodialysis module 2 to ensure that the outlet water flow rate of the first electrodialysis module 2 is controllable, rather than varying with the water pressure.

[0040] Furthermore, the electrodialysis water purifier further includes a first flushing pipeline 5. There is a second branch port 33 on the second pipeline 3. The second branch port 33 is located after the first branch port 32 and before the water outlet switch 31. There is a third branch port 43 on the waste water pipeline. The third branch port 43 is located after the second waterway switch 41 and before the check valve 42. The pure water pipeline further includes a first post-filter 34, and the first post-filter 34 is arranged on the second pipeline 3. The first post-filter 34 is located after the first branch port 32 and before the second branch port 33. One end of the first flushing pipeline 5 is connected to the second branch port 33, and the other end is connected to the third branch port 43. The function of the first post-filter 34 is to further filter the water output from the pre-filter 11 or the first electrodialysis module 2 to improve the taste of the outlet water. To further filter out microorganisms in the water, the first post-filter 34 includes filter materials such as non-woven fabric, activated carbon, folded paper PP, folded paper membrane, ultrafiltration membrane, and microfiltration membrane. Filter materials with stronger filtration performance are preferably selected. The first post-filter 34 is arranged after the first electrodialysis module 2, and can filter out bacteria, viruses and other microorganisms that cannot be treated by electrodialysis, solving the problem of low removal rate of microorganisms by the first electrodialysis module 2.

[0041] Furthermore, a fifth waterway switch is arranged on the first flushing pipeline 5, and the fifth waterway switch is used to control the opening and closing of the first flushing pipeline 5.

[0042] When the electrodialysis water purifier is in the pure water output mode, the flow rate regulating device 13, the first waterway switch 12 and the water outlet switch 31 are turned on, the second waterway switch 41 is turned off, the first electrodialysis module 2 is turned on, and the water flow pretreated by the pre-filter 11 flows into the first electrodialysis module 2. The water further treated by the first electrodialysis module 2 and the first post-filter 34 in sequence flows out from the drinking water outlet through the pure water pipeline.

[0043] When the first electrodialysis module 2 needs to be regenerated, the flow rate regulating device 13, the first waterway switch 12 and the second waterway switch 41 are turned on, the water outlet switch 31 is turned off, the first electrodialysis module 2 is turned on and the electrodes are inverted (the anode and cathode are exchanged), so that the first electrodialysis module 2 enters the regeneration state. The water flow pretreated by the pre-filter 11 flows into the first electrodialysis module 2. After the electrodialysis regeneration, the concentrated water and wastewater flow out from the concentrated water outlet through the pipeline.

[0044] When the first post-filter 34 needs to be flushed, the first waterway switch 12 and the fifth waterway switch are turned on, the water outlet switch 31 and the second waterway switch 41 are turned off, the first electrodialysis module 2 is turned on, and the water flow pretreated by the pre-filter 11 flows into the first electrodialysis module 2. The water flowing through the first electrodialysis module 2 and the first post-filter 34 in sequence flows out from the concentrated water outlet through the first flushing pipeline 5.

[0045] Embodiment Three:

[0046] See Figure 3 , compared with Embodiment One, the difference in Embodiment Three is that the electrodialysis water purifier further includes a second electrodialysis module 6 and a third waterway switch 16. A fourth branch port 14 is provided on the first pipeline 1. The fourth branch port 14 is located after the pre-filter 11 and before the first waterway switch 12. The fourth branch port 14 diverts the first pipeline 1 to form a first branch pipeline 15. The third waterway switch 16 and the second electrodialysis module 6 are sequentially arranged on the first branch pipeline 15. The end of the first branch pipeline 15 is connected to the first branch port 32. The first electrodialysis module 2 and the second electrodialysis module 6 are arranged in parallel, and each is provided with an independent switch to control the water flow. The first electrodialysis module 2 and the second electrodialysis module 6 can be regenerated simultaneously or at staggered times.

[0047] Furthermore, the water inlet pipeline further includes a TDS sensor and a flow rate regulating device 13. The TDS sensor and the flow rate regulating device 13 are sequentially arranged on the first pipeline 1 and are located between the pre-filter 11 and the first waterway switch 12. The flow rate regulating device 13 can adjust the water inlet flow rate of the first electrodialysis module 2 and the second electrodialysis module 6, ensuring that the water outlet flow rate of the first electrodialysis module 2 and the second electrodialysis module 6 is controllable and will not change with the water pressure.

[0048] When the first electrodialysis module 2 is regenerated, the flow regulating device 13, the first waterway switch 12, and the second waterway switch 41 are opened, the third waterway switch 16 and the water outlet switch 31 are closed, the first electrodialysis module 2 is opened and the electrodes are reversed (the anode and cathode are exchanged) to enter the regeneration state, and the water pretreated by the pre-filter 11 enters the first electrodialysis module 2 for regeneration. After regeneration, it is discharged from the concentrated water outlet through the waste water pipeline.

[0049] When the second electrodialysis module 6 is regenerated, the flow regulating device 13, the third waterway switch 16, and the second waterway switch 41 are opened, the first waterway switch 12 and the water outlet switch 31 are closed, the second electrodialysis module 6 is opened and the electrodes are reversed (the anode and cathode are exchanged) to enter the regeneration state, and the water pretreated by the pre-filter 11 enters the second electrodialysis module 6 for regeneration. After regeneration, it is discharged from the concentrated water outlet through the waste water pipeline.

[0050] Example 4:

[0051] See Figure 4 , compared with Example 3, the difference in Example 4 is that the electrodialysis water purifier further includes a second flushing pipeline 7, the pure water pipeline further includes a second post-filter 35, the second post-filter 35 is arranged on the second pipeline 3, one end of the second flushing pipeline 7 is communicated with the waste water pipeline, and the other end is communicated with the water outlet end of the second post-filter 35. The function of the second post-filter 35 is to further filter the water output from the pre-filter 11 or the first electrodialysis module 2 to improve the taste of the water output. The second flushing pipeline 7 is used to flush the filter element. A sixth waterway switch is arranged on the second flushing pipeline 7, and the second post-filter 35 is flushed through the second flushing pipeline 7 to prevent the second post-filter 35 from generating peculiar smell.

[0052] Furthermore, the pre-filter 11 and the second post-filter 35 are combined to form a composite filter element, which adopts an integrated structure and is beneficial to saving space.

[0053] Example 5:

[0054] See Figure 5, compared with Embodiment 1, the difference in Embodiment 5 is that the electrodialysis water purifier further includes a second branch pipe 8, a second electrodialysis module 6 and a third water path switch 16. The second electrodialysis module 6 is arranged on the third pipe 4 and is located before the second water path switch 41. There is a fourth branch port 14 on the first pipe 1. The fourth branch port 14 is located before the first water path switch 12 and after the pre-filter 11. The fourth branch port 14 diverts the first pipe 1 to form a first branch pipe 15. The third water path switch 16 is arranged on the first branch pipe 15. There are a fifth branch port 44 and a sixth branch port 45 on the third pipe 4. The fifth branch port 44 is located after the second electrodialysis module 6 and before the second water path switch 41. The sixth branch port 45 is located after the second water path switch 41 and before the check valve 42. The end of the first branch pipe 15 is connected to the fifth branch port 44. There is a seventh branch port 17 on the first pipe 1. The seventh branch port 17 is located after the first water path switch 12 and before the first electrodialysis module 2. One end of the second branch pipe 8 is connected to the sixth branch port 45, and the other end is connected to the seventh branch port 17. There is a fourth water path switch 81 on the second branch pipe 8. The regeneration of both the first electrodialysis module 2 and the second electrodialysis module 6 is divided into two stages.

[0055] When the first electrodialysis module 2 enters the first stage of regeneration, the flow regulating device 13, the third water path switch 16 and the fourth water path switch 81 are opened. The first electrodialysis module 2 is opened and the electrodes are reversed (the anode and cathode are exchanged) to enter the regeneration state. The water pretreated by the pre-filter 11 flows into the second electrodialysis module 6, and then enters the first electrodialysis module 2 for regeneration. After regeneration, it is discharged from the concentrated water port through the second branch pipe 8. When the first electrodialysis module 2 enters the second stage of regeneration, the flow regulating device 13, the third water path switch 16 and the fourth water path switch 81 are opened. The first electrodialysis module 2 is opened and the electrodes are reversed (the anode and cathode are exchanged) to enter the regeneration state. At the same time, the second electrodialysis module 6 is opened. The water pretreated by the pre-filter 11 flows into the second electrodialysis module 6. The water further filtered by the second electrodialysis module 6 enters the first electrodialysis module 2 for regeneration. After regeneration, it is discharged from the concentrated water port through the second branch pipe 8.

[0056] When the second electrodialysis module 6 enters the first stage of regeneration, the flow regulating device 13, the first waterway switch 12, and the second waterway switch 41 are opened. The second electrodialysis module 6 is opened and the electrodes are reversed (the anode and cathode are exchanged) to enter the regeneration state. The water pretreated by the pre-filter 11 flows into the first electrodialysis module 2 and then enters the second electrodialysis module 6 for regeneration. After regeneration, it is discharged from the concentrated water outlet through the waste water pipeline. When the second electrodialysis module 6 enters the second stage of regeneration, the flow regulating device 13, the first waterway switch 12, and the second waterway switch 41 are opened. The second electrodialysis module 6 is opened and the electrodes are reversed (the anode and cathode are exchanged) to enter the regeneration state. At the same time, the first electrodialysis module 2 is opened. The water pretreated by the pre-filter 11 flows into the first electrodialysis module 2, and the water further filtered by the first electrodialysis module 2 enters the second electrodialysis module 6 for regeneration. After regeneration, it is discharged from the concentrated water outlet through the waste water pipeline.

[0057] In the first stage of regeneration of the first electrodialysis module 2, there is no need to supply power to the second electrodialysis module 6. Similarly, in the first stage of regeneration of the second electrodialysis module 6, there is no need to supply power to the first electrodialysis module 2, which can save the usage cost of the product.

[0058] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the protection scope of the invention.

Claims

1. An electrodialysis water purifier, characterized in that: It comprises a water inlet pipeline, a first electrodialysis module (2), a pure water pipeline and a waste water pipeline, wherein the water outlet end of the water inlet pipeline is connected to the water inlet end of the first electrodialysis module (2), the water inlet end of the pure water pipeline is connected to the water outlet end of the first electrodialysis module (2), and the water inlet end of the waste water pipeline is connected to the water outlet end of the first electrodialysis module (2).

2. The electrodialysis water purifier according to claim 1, characterized in that: The water inlet pipeline comprises a first pipeline (1), a pre-filter element (11) and a first water circuit switch (12); the pre-filter element (11) and the first water circuit switch (12) are arranged on the first pipeline (1) in sequence; the water outlet end of the first pipeline (1) is connected to the water inlet end of the first electrodialysis module (2).

3. The electrodialysis water purifier according to claim 2, characterized in that: The pure water pipeline comprises a second pipeline (3) and a water outlet switch (31), wherein the water outlet switch (31) is arranged on the second pipeline (3), and the water inlet end of the second pipeline (3) is connected to the water outlet end of the first electrodialysis module (2).

4. The electrodialysis water purifier according to claim 3, characterized in that: The wastewater pipeline comprises a third pipeline (4), a check valve (42) and a second waterway switch (41); the second waterway switch (41) and the check valve (42) are arranged on the third pipeline (4) in sequence; a first branch port (32) is provided on the second pipeline (3); the first branch port (32) is located before the water outlet switch (31); and the water inlet end of the third pipeline (4) is connected to the first branch port (32).

5. The electrodialysis water purifier according to claim 4, characterized in that: The water inlet pipeline further comprises a flow regulating device (13), and the flow regulating device (13) is arranged on the first pipeline (1).

6. The electrodialysis water purifier according to claim 5, characterized in that: The electrodialysis water purifier further comprises a first flushing pipeline (5); a second branch port (33) is provided on the second pipeline (3); the second branch port (33) is located after the first branch port (32) and before the water outlet switch (31); a third branch port (43) is provided on the wastewater pipeline; the third branch port (43) is located after the second waterway switch (41) and before the check valve (42); the pure water pipeline further comprises a first post-filter element (34); the first post-filter element (34) is provided on the second pipeline (3); the first post-filter element (34) is located after the first branch port (32) and before the second branch port (33); one end of the first flushing pipeline (5) is connected to the second branch port (33), and the other end is connected to the third branch port (43).

7. The electrodialysis water purifier according to claim 5, characterized in that: The electrodialysis water purifier further comprises a second electrodialysis module (6) and a third water circuit switch (16); a fourth branch port (14) is provided on the first pipeline (1); the fourth branch port (14) is located after the pre-filter element (11) and before the first water circuit switch (12); the fourth branch port (14) branches the first pipeline (1) to form a first branch pipeline (15); the third water circuit switch (16) and the second electrodialysis module (6) are sequentially arranged on the first branch pipeline (15); and the end of the first branch pipeline (15) is connected to the first branch port (32).

8. The electrodialysis water purifier according to claim 5, characterized in that: The electrodialysis water purifier further comprises a second flushing pipeline (7), and the pure water pipeline further comprises a second post-filter element (35), the second post-filter element (35) being arranged on the second pipeline (3), one end of the second flushing pipeline (7) being connected to the wastewater pipeline, and the other end being connected to the water outlet end of the second post-filter element (35).

9. The electrodialysis water purifier according to claim 8, characterized in that: The front filter element (11) and the second rear filter element (35) are combined to form a composite filter element.

10. The electrodialysis water purifier according to claim 5, characterized in that: The electrodialysis water purifier further comprises a second branch pipeline (8), a second electrodialysis module (6) and a third water circuit switch (16); the second electrodialysis module (6) is arranged on the third pipeline (4) and is located before the second water circuit switch (41); the first pipeline (1) is provided with a fourth branch port (14); the fourth branch port (14) is located before the first water circuit switch (12) and after the pre-filter element (11); the fourth branch port (14) branches the first pipeline (1) to form a first branch pipeline (15); the third water circuit switch (16) is arranged on the first branch pipeline (15); the third pipeline (4) is provided with a fifth branch port (44) and a sixth branch port (45); the first branch port (14) is provided with a fifth branch port (44) and a sixth branch port (45); The fifth branch port (44) is located after the second electrodialysis module (6) and before the second water circuit switch (41); the sixth branch port (45) is located after the second water circuit switch (41) and before the check valve (42); the end of the first branch pipe (15) is connected to the fifth branch port (44); the first pipe (1) is provided with a seventh branch port (17); the seventh branch port (17) is located after the first water circuit switch (12) and before the first electrodialysis module (2); one end of the second branch pipe (8) is connected to the sixth branch port (45), and the other end is connected to the seventh branch port (17); the second branch pipe (8) is provided with a fourth water circuit switch (81).

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