Integrated electrodialysis filtering device and water purifier

Abstract

The utility model discloses an integrated electrodialysis filtering device and a water purifier, the integrated electrodialysis filtering device comprises a device body, a waterway plate assembly, a composite filter element and an electrodialysis filter element, the waterway plate assembly, the composite filter element and the electrodialysis filter element are arranged in the device body, and each of the composite filter element and the electrodialysis filter element is provided with an inlet and an outlet. The waterway plate assembly is vertically arranged and is provided with a water inlet channel and a water outlet channel which are respectively connected with the inlet and the outlet; the water outlet channel of the composite filter element can be connected with the water inlet channel of the electrodialysis filter element; the waterway plate assembly is provided with a regeneration channel and a wastewater channel to connect the outlet and the inlet of the electrodialysis filter element, and the water inlet channel and the regeneration channel are connected with the raw water channel; the electrodialysis filter element comprises at least two sub-filter elements which are coaxially arranged and fixedly connected in a linear mode, each sub-filter element is provided with a water inlet and a water outlet, the sub-filter elements are used for being connected with raw water and discharging pure water in the water making process or used for being connected with the raw water and discharging waste water in the regeneration process, and the water outlets of the sub-filter elements can be communicated. Multi-stage waterway control, various water quality output and mutual regeneration can be realized.

Description

Technical Field

[0001] This utility model relates to the field of water treatment equipment technology, and in particular to an integrated electrodialysis filtration device and water purifier. Background Technology

[0002] A water purifier is a water treatment device that performs deep filtration and purification of water according to usage requirements. It achieves desalination and regeneration processes through electrodialysis filter cartridges. Traditional water purifiers use two electrodialysis filter cartridges that regenerate each other. When either cartridge is regenerating, the pure water produced by the other cartridge is entirely used to regenerate the cartridge undergoing regeneration. Thus, when either cartridge is regenerating, the entire water purifier does not produce pure water, significantly reducing the time users can enjoy pure water and causing inconvenience in daily use.

[0003] To address the aforementioned issues, existing technology discloses a continuous-flow bipolar membrane electro-assisted deionization system, comprising multiple filter units installed in a pipeline system. At least one filter unit simultaneously produces water and distributes a portion of the purified water as regeneration feed water to other filter units requiring regeneration. This allows for continuous water production during regeneration, improving user experience. However, because each filter unit is independently configured, the water circuit is complex and occupies considerable space, hindering its application in water purifiers. Furthermore, since users have varying water quality requirements in different scenarios, there is an urgent need for water purifiers capable of providing multiple water qualities to meet user needs. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the present invention provides an integrated electrodialysis filtration device and water purifier, which integrates multiple sub-filters into one electrodialysis filter to simplify the water circuit structure, making the electrodialysis filter compact and small in size, which is convenient for widespread application in water purifiers. At the same time, it can realize multi-stage water circuit control, multiple water quality outputs and mutual regeneration, ensuring the user's water experience.

[0005] The technical solution adopted by this utility model to solve its problem is:

[0006] In a first aspect, this utility model provides an integrated electrodialysis filtration device, comprising: a device body, a water circuit board assembly, a composite filter element placed horizontally and stacked vertically, and an electrodialysis filter element, both of which are provided with an inlet and an outlet, the water circuit board assembly being vertically disposed on one side of the horizontal direction of the composite filter element, the water circuit board assembly being provided with an inlet channel and an outlet channel corresponding to both the composite filter element and the electrodialysis filter element to be connected to the inlet and outlet respectively, and the outlet channel of the composite filter element can be connected to the inlet channel of the electrodialysis filter element;

[0007] The water circuit board assembly is also equipped with a regeneration channel and a wastewater channel for the corresponding electrodialysis filter element to connect to the outlet and inlet respectively. Both the inlet channel and the regeneration channel are connected to the raw water channel.

[0008] The electrodialysis filter element includes at least two sub-filter elements that are coaxially arranged and fixedly connected in a straight line. Each sub-filter element is provided with an inlet and an outlet that can be connected to the inlet and outlet of the electrodialysis filter element, so as to connect raw water and discharge pure water respectively during water production, or to discharge wastewater and connect raw water respectively during regeneration, and the outlets of each sub-filter element can be connected to each other.

[0009] In a preferred embodiment, the inlet and outlet of both the composite filter element and the electrodialysis filter element are located at their axial ends near the water circuit board assembly.

[0010] In a preferred embodiment, the sub-filter element includes an outer cylinder, an electrodialysis membrane stack, and an electrode assembly. The outer cylinder has an internal receiving cavity, and the inlet and outlet are both located on the outer cylinder and communicate with the receiving cavity.

[0011] The electrodialysis membrane stack is coaxially arranged in the receiving cavity, and there is a gap between the electrodialysis membrane stack and the radial cavity wall of the receiving cavity to connect the water inlet. The electrodialysis membrane stack includes a central tube, a membrane assembly wound and sleeved on the central tube, and a sealing cap that seals and fixes the axial end faces of the membrane assembly. Several water permeable holes are opened on the central tube.

[0012] The electrode assembly includes an inner support inside the central tube, an outer support outside the membrane assembly, and electrode wires wound on the inner and outer supports. The inner support has an axially extending channel that connects to the outlet, and the inner support has a water outlet corresponding to the electrodialysis membrane stack that connects to the channel.

[0013] In a preferred embodiment, the outer cylinder includes a cylinder body with an internal receiving cavity and an opening at one axial end, an end cap detachably installed at the opening, the end cap being disposed near the water circuit board assembly, the inlet and outlet being disposed on the end cap, and the electrode wire being able to pass through the end cap of any sub-filter element.

[0014] In a preferred embodiment, the surface of the electrode wire is provided with an insulating layer, and a sealing sleeve is provided at the point where the electrode wire passes through the end cap. The end cap has a through hole for the electrode wire to pass through, and a groove is provided on the outer end face of the end cap to fix the electrode wire.

[0015] In a preferred embodiment, the inlet is positioned at the highest point of the inner wall of the cylinder, and / or the device body or electrodialysis filter element is tilted so that the inlet is tilted upward, and the wastewater channel extends laterally and / or vertically upward along the flow direction of the wastewater.

[0016] The outlet is connected to the channel, and the internal support is provided with a water inlet at the end of the electrodialysis membrane stack away from the outlet.

[0017] In a preferred embodiment, the inlet and outlet of each sub-filter element are located at the axial end of the electrodialysis filter element, which has an inlet and an outlet. The axial end of the electrodialysis filter element is provided with the end cap of the sub-filter element at the end. The inlet of other sub-filter elements is installed on the end cap of the axial end through an extension pipe. The channel of other sub-filter elements is connected to the outlet of the corresponding end cap of the axial end through a coaxial outlet pipe, and the outlet pipe is sleeved in the inner support on its extension path.

[0018] In a preferred embodiment, each inlet has an extension section extending horizontally outward perpendicular to the axial direction to be staggered.

[0019] In a preferred embodiment, at least two electrodialysis filter cartridges are stacked vertically and arranged in parallel, and the outlet channels corresponding to the at least two electrodialysis filter cartridges are connected.

[0020] Secondly, this utility model provides a water purifier, including: the above-mentioned integrated electrodialysis filtration device.

[0021] The integrated electrodialysis filtration device and water purifier provided by this utility model have the following technical effects:

[0022] (1) At least two sub-filter elements are coaxially arranged and fixedly connected in a straight line so that at least two sub-filter elements are integrated into one electrodialysis filter element, thereby simplifying the water circuit structure and making the electrodialysis filter element compact and small in size, which is convenient for widespread application in water purifiers.

[0023] (2) Since the inlet and outlet of each sub-filter are connected to the raw water and discharged pure water respectively during water production, or discharged wastewater and connected to the raw water respectively during regeneration, and the outlets of each sub-filter can be connected, the water circuit of each sub-filter can be controlled independently. Once a sub-filter is regenerated, the other sub-filters can produce water normally for users, and a small amount of pure water can be allocated to rinse the regenerated sub-filter. In this way, the integrated electrodialysis filter not only realizes multi-stage water circuit control and mutual regeneration, but also uses only a small amount of pure water produced by the normally producing sub-filter during the regeneration process, which has little impact on the user's water flow rate, thus ensuring the user's water experience.

[0024] (3) The composite filter element and the electrodialysis filter element are placed horizontally and stacked vertically, which can reasonably allocate the horizontal and vertical space. With the water circuit board assembly set vertically on the horizontal side of the composite filter element, the water circuit can be reasonably laid out, so that the internal layout of the device body is neat and the overall volume is small, thereby reducing the space occupied by the electrodialysis filtration device. It can be easily installed in water purifiers, making the choice of installation location more extensive.

[0025] (4) The composite filter cartridge and the electrodialysis filter cartridge are installed together, allowing users to choose between the composite filter cartridge or the electrodialysis filter cartridge for water purification according to their water quality requirements, thus meeting the needs of multiple water quality outputs. Furthermore, the outlet channel of the composite filter cartridge can be connected to the inlet channel of the electrodialysis filter cartridge, allowing the composite filter cartridge to initially remove large particles and odors, preventing clogging of the electrodialysis filter cartridge and thereby extending its service life. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of the electrodialysis filter element of this utility model;

[0027] Figure 2 This is a schematic diagram of the main structure of the electrodialysis filter element of this utility model;

[0028] Figure 3 This is a schematic diagram showing the disassembled structure of the sub-filter elements of the electrodialysis filter element of this utility model;

[0029] Figure 4 This is an exploded view of the electrodialysis filter element of this utility model;

[0030] Figure 5 This is an axial sectional view of the electrodialysis filter element of this utility model;

[0031] Figure 6 for Figure 5 Enlarged view of point A in the middle;

[0032] Figure 7 for Figure 5 Enlarged view at point B in the middle;

[0033] Figure 8 This is a schematic diagram of the end cap structure of this utility model;

[0034] Figure 9 This is a schematic diagram of the integrated electrodialysis filtration device of this utility model;

[0035] Figure 10 This is a schematic diagram of the main structure of the integrated electrodialysis filtration device of this utility model;

[0036] Figure 11 This is a cross-sectional view of the integrated electrodialysis filtration device of this utility model.

[0037] The meanings of the reference numerals in the attached figures are as follows:

[0038] 100. Device body; 200. Composite filter element; 300. Electrodialysis filter element; 400. Water circuit board assembly; 10. First sub-filter element; 20. Second sub-filter element; 30. Outer shell; 1. Outer cylinder; 11. Receiving cavity; 12. Inlet; 121. Extension section; 13. Outlet; 14. Gap; 15. Cylinder; 151. Opening; 16. End cap; 161. Through hole; 162. Slot; 17. Sealing sleeve; 18. Extension tube; 19. Outlet tube; 2. Electrodialysis membrane stack; 21. Central tube; 22. Membrane module; 23. Sealing cap; 3. Electrode assembly; 31. Inner support; 311. Channel; 312. Water outlet; 32. Outer support. Detailed Implementation

[0039] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0040] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0042] See Figure 9-11This utility model provides an integrated electrodialysis filtration device, comprising: a device body 100, within which a water channel plate assembly 400, a horizontally placed and vertically stacked composite filter element 200, and an electrodialysis filter element 300 are provided. Both the composite filter element 200 and the electrodialysis filter element 300 have inlets and outlets. The water channel plate assembly 400 is vertically disposed on one side of the horizontal axis of the composite filter element 200. The water channel plate assembly 400 has inlet and outlet channels corresponding to both the composite filter element 200 and the electrodialysis filter element 300, respectively connecting to the inlet and outlet. The outlet channel of the composite filter element 200 can be connected to the inlet channel of the electrodialysis filter element 300. The water channel plate assembly 400 also has a regeneration channel and a wastewater channel corresponding to the electrodialysis filter element 300, respectively connecting to the outlet and inlet. Both the inlet channel and the regeneration channel are connected to the raw water channel. The electrodialysis filter element 300 includes at least two sub-filter elements that are coaxially arranged and fixedly connected in a straight line. Each sub-filter element is provided with an inlet 12 and an outlet 13 that can be connected to the inlet and outlet of the electrodialysis filter element 300, so as to connect raw water and discharge pure water respectively during water production, or to discharge wastewater and connect raw water respectively during regeneration, and the outlets 13 of each sub-filter element can be connected to each other.

[0043] The composite filter element 200 and the electrodialysis filter element 300 are placed horizontally and stacked vertically, which can reasonably allocate the horizontal and vertical space. With the water circuit board assembly 400 arranged vertically on one side of the composite filter element 200, a reasonable water circuit layout can be achieved. This makes the internal layout of the device body 100 neat and the overall volume small, thereby reducing the space occupied by the electrodialysis filtration device. It can be easily installed in water purifiers, making the choice of installation location more extensive.

[0044] In an integrated electrodialysis filtration device, the raw water channel connects to external raw water, such as untreated tap water, while the outlet channel connects to an external water outlet device. The composite filter cartridge 200 and the electrodialysis filter cartridge 300 are used together, allowing users to choose either the composite filter cartridge 200 or the electrodialysis filter cartridge 300 for water purification based on their water quality requirements, thus meeting multiple water quality needs. The composite filter cartridge 200, comprising PP cotton and activated carbon, can initially filter and remove large particles and odors. For applications with lower water quality requirements, such as washing and cooking, water purified by the composite filter cartridge 200 can be used directly. For applications with higher water quality requirements, such as drinking water, water purified by the electrodialysis filter cartridge 300 can be used directly. Furthermore, the outlet channel of the composite filter cartridge 200 can be connected to the inlet channel of the electrodialysis filter cartridge 300, allowing the composite filter cartridge 200 to initially remove large particles and odors, preventing clogging of the electrodialysis filter cartridge 300 and thus extending its service life.

[0045] The inlet and outlet of both the composite filter element 200 and the electrodialysis filter element 300 are located at their axial ends near the water circuit board assembly 400. This facilitates the water circuit connection inside the device body 100, further simplifies the water circuit structure, and improves space utilization.

[0046] At least two electrodialysis filter cartridges 300 are stacked vertically and arranged in parallel, and the outlet channels of at least two electrodialysis filter cartridges 300 are connected. In the water production mode, each electrodialysis filter cartridge 300 has a water production function. If a user needs water, water can be produced by one electrodialysis filter cartridge 300 or by two or more electrodialysis filter cartridges 300 working together. The number of electrodialysis filter cartridges 300 used for water production is determined by the number of electrodialysis filter cartridges 300 in the electrodialysis filtration device, the water production capacity, and the user's water consumption. Raw water flows through the raw water channel to the corresponding inlet channel on the water circuit board assembly 400, and then enters the corresponding electrodialysis filter cartridge 300 through the inlet to obtain pure water through electro-adsorption of ions before flowing out from the outlet. Finally, it flows through the corresponding outlet channel to the external water outlet device for user use.

[0047] If at least one electrodialysis filter element 300 is being regenerated, in the early stage of regeneration, raw water flows through the raw water channel to the corresponding regeneration channel on the water circuit board assembly 400, and enters the electrodialysis filter element 300 that needs to be regenerated through the outlet. After reverse electrostatic desorption of ions to obtain wastewater, it flows out from the inlet and is then discharged through the corresponding wastewater channel until the ions adsorbed in the electrodialysis filter element 300 that needs to be regenerated are basically desorbed. Then, in the final stage of regeneration, the supply of raw water to the electrodialysis filter element 300 requiring regeneration is stopped. Instead, the raw water flows through the raw water channel to the inlet channel of the water circuit board assembly 400 corresponding to at least one normally functioning electrodialysis filter element 300. The water then enters the normally functioning electrodialysis filter element 300 through the inlet, where it obtains pure water through electro-adsorption of ions and flows out through the outlet. It then flows through the corresponding outlet channel to the outlet channel of the aforementioned electrodialysis filter element 300 requiring regeneration, and enters through the outlet to rinse the electrodialysis filter element 300 requiring regeneration. Finally, the wastewater is discharged through the inlet and the corresponding wastewater channel, thus completing the regeneration of the electrodialysis filter element 300. If the user needs water during the rinsing process, the pure water produced by the normally functioning electrodialysis filter element 300 can be diverted through its outlet channel to an external water outlet device for the user's use.

[0048] Based on this, the integrated electrodialysis filtration device of this utility model, in addition to the inlet and outlet water channels, also includes a regeneration channel and a wastewater channel in the water circuit board assembly 400 corresponding to each electrodialysis filter element 300, connecting to the corresponding outlet and inlet respectively. Both the inlet and regeneration channels are connected to the raw water channel. During regeneration, initially, raw water flows in reverse through the raw water channel and regeneration channel through the electrodialysis filter element 300 and is reverse-energized to desorb ions. In the final stage, a small amount of pure water produced by the normally producing electrodialysis filter element 300 is reverse-energized into the regenerated electrodialysis filter element 300 for rinsing, thus completing the regeneration of the electrodialysis filter element 300. In this way, only a small amount of pure water produced by the normally producing electrodialysis filter element 300 is used during the regeneration process, which has virtually no impact on the user's water flow rate, achieving a seamless regeneration effect. This not only ensures a good user experience and avoids excessive waste of pure water but also helps reduce the energy consumption of the electrodialysis filtration device.

[0049] Based on this, each electrodialysis filter element 300 can have two, three, four, or more sub-filter elements. This utility model takes the example of having two sub-filter elements in each electrodialysis filter element 300. The two sub-filter elements are the first sub-filter element 10 and the second sub-filter element 20. The first sub-filter element 10 and the second sub-filter element 20 are arranged adjacent to each other along the axial direction in a straight line, and the two are detachably and fixedly connected. This allows the first sub-filter element 10 and the second sub-filter element 20 to be integrated into one electrodialysis filter element 300, thereby simplifying the water circuit structure and making the electrodialysis filter element 300 compact and small in size, which is convenient for widespread application in water purifiers.

[0050] Because the inlet 12 and outlet 13 of the first sub-filter element 10 and the second sub-filter element 20 are used to connect raw water and discharge pure water respectively during water production, or to discharge wastewater and connect raw water respectively during regeneration, and the outlet 13 of the first sub-filter element 10 and the outlet 13 of the second sub-filter element 20 are interconnected, the water circuits of the first sub-filter element 10 and the second sub-filter element 20 can be controlled independently. When only the first sub-filter element 10 is needed to produce water, the second sub-filter element 20 does not work. Raw water enters the first sub-filter element 10 through the inlet 12 to produce pure water, which then flows out through the outlet 13 for user use. When only the second sub-filter element 20 is needed to produce water, the first sub-filter element 10 does not work. Raw water enters the second sub-filter element 20 through the inlet 12 to produce pure water, which then flows out through the outlet 13 for user use. When a user's water consumption is high, the first sub-filter 10 and the second sub-filter 20 can be controlled to work simultaneously, so as to produce water using both sub-filters at the same time and ensure the user's required amount of pure water. Under normal circumstances, only one sub-filter is needed to meet the user's water needs.

[0051] Once a sub-filter cartridge is regenerated, the other sub-filter cartridges can continue to produce water for the user, and a small amount of pure water can be allocated to rinse the regenerated sub-filter cartridge. For example, during the regeneration of the first sub-filter cartridge 10, in the early stage of regeneration, raw water enters the first sub-filter cartridge 10 through the outlet 13, and reverse current is applied to desorb ions before it is discharged from the inlet 12. This process is repeated until ion desorption is complete. If the user needs water at this time, raw water can enter the second sub-filter cartridge 20 through the inlet 12 to produce pure water, which then flows out through the outlet 13 of the second sub-filter cartridge 20 for the user. At the end of the regeneration process, raw water stops supplying the first sub-filter element 10. Instead, it enters the second sub-filter element 20 through its inlet 12 to produce pure water. This pure water then flows out through the outlet 13 of the second sub-filter element 20 and back into the first sub-filter element 10 through its outlet 13 for rinsing. Finally, it exits through the inlet 12 of the first sub-filter element 10, thus completing the regeneration of the first sub-filter element 10. At this point, if the user needs water, the pure water produced by the second sub-filter element 20 is diverted from its outlet 13 for the user's use. The regeneration principle of the second sub-filter element 20 is the same and will not be repeated here. Generally, only one sub-filter element is in regeneration mode, ensuring that at least one sub-filter element can be used to produce pure water for the user. In this way, the electrodialysis filter cartridge 300 can not only achieve multi-stage water circuit control, multi-stage circuit control and mutual regeneration, but also use only a small amount of pure water produced by the normal water production sub-filter cartridge during the regeneration process, which has little impact on the user's water flow rate, thus ensuring the user's water experience.

[0052] See Figure 1 The electrodialysis filter element 300 also includes a housing 30, within which each sub-filter element is installed. One axial end of the housing 30 has an opening, and the interior of the housing 30 is provided with an installation cavity communicating with the opening. This allows each sub-filter element to be installed into the installation cavity through the opening, thus protecting each sub-filter element using the housing 30. The inlet 12, outlet 13, and electrical connection components located within the installation cavity can directly pass through the side wall of the housing 30 or extend to the opening of the housing 30 for corresponding connections. For example, in this invention, the first sub-filter element 10 and the second sub-filter element 20 are sequentially installed into the installation cavity. The first sub-filter element 10 is located further inside the installation cavity than the second sub-filter element 20, and its inlet 12, outlet 13, and electrical connection components can directly pass through the side wall of the housing 30 or extend to the opening of the housing 30 for corresponding connections. One end of the second filter element 20 is located outside the housing 30, and its inlet 12, outlet 13, and electrical connection components can all be connected from this end, thus facilitating wiring.

[0053] Specifically, see Figure 4-5The filter element includes an outer cylinder 1, an electrodialysis membrane stack 2, and an electrode assembly 3. The outer cylinder 1 has an internal receiving cavity 11. An inlet 12 and an outlet 13 are both located on the outer cylinder 1 and communicate with the receiving cavity 11. The electrodialysis membrane stack 2 is coaxially disposed within the receiving cavity 11, and a gap 14 communicating with the inlet 12 is provided between the electrodialysis membrane stack 2 and the radial wall of the receiving cavity 11. The electrodialysis membrane stack 2 includes a central tube 21, a membrane assembly 22 wound and sleeved on the central tube 21, and a dense... The sealing caps 23 on both ends of the membrane assembly 22 are sealed, and the central tube 21 has several water-permeable holes. The electrode assembly 3 includes an inner support 31 inside the central tube 21, an outer support 32 outside the membrane assembly 22, and electrode wires wound on the inner support 31 and the outer support 32. The inner support 31 has an axially extending channel 311 that communicates with the outlet 13, and the inner support 31 has a water outlet 312 corresponding to the electrodialysis membrane stack 2 that communicates with the channel 311.

[0054] The outer cylinder 1, the electrodialysis membrane stack 2, and the electrode assembly 3 are all coaxially arranged, with the electrodialysis membrane stack 2 and the electrode assembly 3 both located within the receiving cavity 11 of the outer cylinder 1. The inlet 12 and outlet 13 can be located at any position on the outer cylinder 1, as long as they can meet the requirements for water inflow and outflow. The membrane assembly 22 is composed of several membrane sheets wound together, with a flow channel formed between adjacent membrane sheets for water to flow through. The cap 23 is sealed and bonded to both ends of the membrane assembly 22 to ensure that water flows only through the flow channel, thereby ensuring the ion adsorption or desorption effect. The outer support 32 has several perforated holes for water to pass through. Electrode wires are wound around the inner support 31 and the outer support 32, and are electrically connected to an external power source to achieve electrodialysis or regeneration. During electrodialysis water production, the electrode wires on the outer support 32 are connected to the positive electrode, and the electrode wires on the inner support 31 are connected to the negative electrode to achieve ion adsorption by the electrodialysis membrane stack 2. During the regeneration of the electrodialysis membrane stack 2, the electrode wire on the outer support 32 is connected to the negative electrode, and the electrode wire on the inner support 31 is connected to the positive electrode, so as to achieve the desorption of ions from the electrodialysis membrane stack 2.

[0055] Thus, during water production, the electrode wire on the outer support 32 is connected to the positive electrode, and the electrode wire on the inner support 31 is connected to the negative electrode. Raw water enters the receiving chamber 11 through the inlet 12, passes through the gap 14 into the electrodialysis membrane stack 2, flows through the flow channels of the membrane module 22 to adsorb ions, and then enters the channel 311 through the water permeation holes on the central tube 21 and the water outlet 312 on the inner support 31. It then flows along the channel 311 and flows out from the outlet 13 for user use. During regeneration, the electrode wire on the outer support 32 is connected to the negative electrode, and the electrode wire on the inner support 31 is connected to the positive electrode. Raw water or pure water used for rinsing enters the channel 311 through the outlet 13, passes through the water outlet 312 and the water permeation holes on the central tube 21 into the membrane module 22, flows through the flow channels of the membrane module 22 to desorb ions, passes through the gap 14, and is discharged from the inlet 12 to complete regeneration.

[0056] It is worth noting that the outer cylinder 1 of the first sub-filter element 10 and the second sub-filter element 20, the electrodialysis membrane stack 2 and the electrode assembly 3 are all independent structures, and the two can be independent of each other to form an independent water system and electrical system.

[0057] See Figure 3-5 The outer cylinder 1 includes a cylindrical body 15 with an internal receiving cavity 11 and an opening 151 at one axial end, and an end cap 16 detachably installed at the opening. The end cap 16 is located near the water circuit board assembly 400. The inlet 12 and outlet 13 are both located on the end cap 16, and the electrode wire can pass through the end cap 16 of any sub-filter element. The outer cylinder 1 can be cylindrical, frustum-shaped, cuboid, etc. This utility model is described using a cylindrical outer cylinder 1 as an example. The end caps 16 of the first sub-filter element 10 and the second sub-filter element 20 are both located on the open side near the outer shell 30 to facilitate water and electrical circuit connections. Furthermore, the end caps 16 of each sub-filter element are detachably and fixedly connected to the cylindrical body 15, which can be a snap-fit ​​connection, a threaded connection, a screw connection, etc. The connection method is not specifically limited and can be set according to actual needs. The electrode wire can be passed out from the end cap 16 of its corresponding sub-filter element, or it can be passed out from the end cap 16 at the opening of other sub-filter elements. As long as measures are taken to prevent leakage of electricity and water, it is fine.

[0058] The electrode wire has an insulating layer on its surface, and a sealing sleeve 17 is fitted at the point where the electrode wire exits the end cap 16. The end cap 16 has a through hole 161 for the electrode wire to pass through, and a groove 162 is provided on the outer end face of the end cap 16 to fix the electrode wire. A portion of the electrode wire is located in the receiving cavity 11, and its surface is insulated to prevent leakage, thereby providing electrical protection. The electrode wire is sealed at the through hole 161 to prevent water leakage. Generally, if the through hole 161 is suitable for the electrode wire, the electrode wire can pass directly through the through hole 161. Of course, preferably, a sealing sleeve 17 is provided at the through hole 161 so that the electrode wire passes through the through hole 161 with the help of the sealing sleeve 17, thereby ensuring the sealing effect at the point where the electrode wire exits. The sealing sleeve 17 can be made of silicone, which has good elasticity and sealing effect, and is inexpensive. A groove is provided on the outer end face of the end cap 16 to allow the electrode wire to pass through and connect to an external power source. The groove can avoid the electrode wire, thereby ensuring the connection effect between the sub-filters. The groove is provided with a slot 162, which is adapted to the electrode wire to fix the electrode wire in the slot 162, thereby ensuring the stability of the electrode wire connection and the stability of the sub-filter element electrical connection.

[0059] It should be noted that, taking the two sub-filter elements of this utility model as an example, the electrode wire of the second sub-filter element 20 passes through the end cap 16 and is located at the opening of the outer casing 30, allowing it to be directly electrically connected to an external power source. The electrode wire of the first sub-filter element 10 passes through the end cap 16 and is located inside the mounting cavity of the outer casing 30. The electrode wire of the first sub-filter element 10 extends axially along the mounting cavity to pass through the opening before connecting to the external power source. In this way, the electrode wires of each sub-filter element are connected to the external power source through the opening, resulting in a simple circuit structure and convenient installation.

[0060] See Figure 2-6 The inlet 12 is set at the highest point of the inner wall of the cylinder 15, and / or the device body 100 or the electrodialysis filter element 300 is tilted so that the inlet 12 is tilted upward, and the wastewater channel extends horizontally and / or vertically upward along the flow direction of the wastewater; the outlet 13 is set at the channel 311, and the inner support 31 is provided with a water outlet 312 at the end of the electrodialysis membrane stack 2 away from the outlet 13.

[0061] The electrodialysis filter element 300 of this invention is placed horizontally, meaning that each sub-filter element is connected horizontally. This facilitates the uniform flow of raw water through the flow channel, thereby improving the water purification effect. The outlet 13 is located in the central area of ​​the end cap 16, corresponding to the inner support 31, reducing the water flow path so that the purified water can flow directly out of the outlet 13 after passing through the channel 311 of the inner support 31. During the regeneration of the sub-filter elements, the raw water flows in reverse, and the electrode assembly 3 is energized in reverse, causing ion desorption and gas generation. The inlet 12 is located at the highest point of the inner wall of the cylinder 15, and / or the device body 100 or the electrodialysis filter element 300 is tilted so that the inlet 12 tilts upward. The wastewater channel extends horizontally and / or vertically upward along the flow direction of the wastewater, which facilitates the smooth discharge of gas from the inlet 12 and the wastewater channel after it flows out with the water, preventing stagnation or backflow into the sub-filter elements, which would cause the internal temperature to rise and affect the service life. The inner support 31 has a water outlet 312 at the end of the electrodialysis membrane stack 2 away from the outlet 13. Whether it is electrodialysis water production or regeneration, the raw water has the longest flow path, and the ion adsorption and desorption effects are the best, which is conducive to improving the water purification and regeneration effects.

[0062] Furthermore, the inlet 12 and outlet 13 of each sub-filter element are located at the axial end of the electrodialysis filter element 300, which has an inlet and an outlet. The axial end of the electrodialysis filter element 300 is provided with the end cap 16 of the sub-filter element at the end. The inlet 12 of other sub-filter elements is installed on the end cap 16 of the axial end through an extension pipe 18. The channel 311 of other sub-filter elements is connected to the outlet 13 of the corresponding end cap 16 of the axial end through a coaxial outlet pipe 19. The outlet pipe 19 is sleeved in the inner support 31 on its extension path.

[0063] Combination Figure 8The following description uses two sub-filter elements as an example. The inlet 12 of the second sub-filter element 20 is located at the highest point of the inner wall of the cylinder 15 of the second sub-filter element 20 and is situated on the end cap 16 of the second sub-filter element 20, allowing direct connection to external raw water. The inlet 12 of the first sub-filter element 10 is also located at the highest point of the inner wall of the cylinder 15 of the first sub-filter element 10 and is situated on the end cap 16 of the first sub-filter element 10. It extends to the end cap 16 of the second sub-filter element 20 via an extension tube 18 for sealing and connection to external raw water. The outlet 13 of the second sub-filter element 20 is located in the middle area of ​​the end cap 16 of the second sub-filter element 20, directly corresponding to the channel 311 of the second sub-filter element 20, allowing direct connection to external water-using equipment after water discharge. The channel 311 of the first sub-filter element 10 is positioned in the middle region of the end cap 16 of the first sub-filter element 10. The outlet 13 of the second sub-filter element 20 extends to the middle region of the end cap 16 of the second sub-filter element 20 via the outlet pipe 19 disposed within the channel 311. Thus, the inlet 12 and outlet 13 of both the first and second sub-filter elements 10 are located on the end cap 16 of the second sub-filter element 20, facilitating water circuit connection.

[0064] Combination Figure 5-7 The channel 311 of the first sub-filter 10 is connected to the outlet pipe 19, but the channel 311 of the first sub-filter 10 is disconnected from the channel 311 of the second sub-filter 20. This ensures that the pure water from the first sub-filter 10 flows through the channel 311 and the outlet pipe 19 before exiting from the outlet 13 of the first sub-filter 10, and the pure water from the second sub-filter 20 flows through the channel 311 before exiting from the outlet 13 of the second sub-filter 20. This prevents interference between the water outputs of the first and second sub-filters, ensuring the independence of the water circuit. Similarly, the water circuits during regeneration are also independent, allowing for independent control of water production and regeneration.

[0065] The axial ends of the cap 23, the inner support 31, and the outlet pipe 19 are all detachably and fixedly connected to the corresponding end caps 16. Adjacent sub-filter elements are detachably and fixedly connected to the cylinder 15 via corresponding end caps 16. The end caps 16 of adjacent sub-filter elements can be snap-fitted, threaded, or screwed to the cylinder 15, ensuring a tight seal to prevent leakage. The axial ends of the cap 23, the inner support 31, and the outlet pipe 19 are all detachably connected to the corresponding end caps 16. Each of these elements has a protruding limiting part, and the end caps 16 have corresponding limiting grooves. This connection of the limiting parts and grooves allows for the fixing of the cap 23, the inner support 31, and the outlet pipe 19, ensuring the electrodialysis membrane stack 2 and the electrode assembly 3 can be stably installed inside the outer cylinder 1.

[0066] See Figure 2-4 and Figure 8 Each inlet 12 extends horizontally outward perpendicular to the axial direction with an extension section 121 to be staggered. The inlet 12 of the first sub-filter element 10 can extend horizontally through the extension section 121 and then be installed on the end cap 16 of the second sub-filter element 20 through the extension pipe 18. The inlet 12 of the second sub-filter element 20 is also horizontally extended through the extension section 121. The inlet 12 of the first sub-filter element 10 and the inlet 12 of the second sub-filter element 20 extend in opposite directions, so that the inlet 12 of the first sub-filter element 10 and the inlet 12 of the second sub-filter element 20 are staggered. This avoids the overlap and interference of the inlet 12 of the first sub-filter element 10 and the inlet 12 of the second sub-filter element 20, and also facilitates water circuit connection.

[0067] It is worth noting that the above descriptions of the structures and connections are all based on two sub-filter elements. For structures with three, four, or more sub-filter elements, the principle is the same as that of two sub-filter elements. Adaptive changes can be made accordingly, and no further discussion will be given in this utility model.

[0068] In addition, this utility model also provides a water purifier, including the aforementioned integrated electrodialysis filtration device. The electrodialysis filter element 300 in the water purifier adopts an integrated structural design, featuring a simple water circuit structure, compact structure, and small size. Therefore, when installed in the water purifier, the electrodialysis filter element 300 occupies less space, which helps reduce the overall size of the water purifier, thus facilitating its installation and widespread use.

[0069] Furthermore, due to the integrated structure of the electrodialysis filter cartridge 300, which has independent water and electrical systems and can regenerate with each other, it can produce water with one sub-filter cartridge, or even two or more sub-filter cartridges simultaneously. This allows for the allocation of the appropriate number of sub-filter cartridges based on the user's water consumption, meeting their needs. Simultaneously, while any sub-filter cartridge is regenerating, the other sub-filter cartridges can continue to produce water for the user, and a small amount of pure water is allocated for rinsing the regenerated cartridge. In this way, the water purifier can provide an uninterrupted supply of pure water, requiring only a small amount of pure water for rinsing during regeneration, avoiding significant waste of pure water, and ensuring a consistent water flow for the user, resulting in a superior water usage experience.

[0070] Meanwhile, the water purifier features a neat internal layout with clear water and electrical circuits, a compact size for easy installation, and a wide range of installation options. Furthermore, at least one electrodialysis filter element 300 is always operational, ensuring user needs are met at all times. During regeneration, the electrodialysis filter element 300 uses a large amount of raw water and reverse current to desorb ions, combined with a small amount of purified water rinsing. The amount of purified water used during regeneration is minimal, resulting in a virtually imperceptible reduction in flow rate, achieving a seamless regeneration effect. This not only ensures a superior user experience and avoids excessive waste of purified water but also reduces the purifier's energy consumption. Moreover, the water and electrical circuits of each electrodialysis filter element 300 are independently controlled, allowing for flexible water production and regeneration. It can also be used with a composite filter element 200 to produce different water qualities to meet diverse user needs. The composite filter element 200 extends the lifespan of the electrodialysis filter elements 300, thus extending the overall lifespan of the water purifier.

[0071] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. An integrated electrodialysis filtration device, characterized in that, include: The device body includes a water channel plate assembly, a horizontally placed and vertically stacked composite filter element and an electrodialysis filter element. Both the composite filter element and the electrodialysis filter element have an inlet and an outlet. The water channel plate assembly is vertically disposed on one side of the horizontal side of the composite filter element. The water channel plate assembly has an inlet channel and an outlet channel corresponding to both the composite filter element and the electrodialysis filter element to connect to the inlet and the outlet, respectively. The outlet channel of the composite filter element can be connected to the inlet channel of the electrodialysis filter element. The water circuit board assembly is further provided with a regeneration channel and a wastewater channel corresponding to the electrodialysis filter element to connect to the outlet and the inlet respectively, and both the inlet channel and the regeneration channel are connected to the raw water channel; The electrodialysis filter element includes at least two sub-filter elements that are coaxially arranged and fixedly connected in a straight line. Each sub-filter element is provided with an inlet and an outlet that can be connected to the inlet and outlet of the electrodialysis filter element, so as to connect raw water and discharge pure water respectively during water production, or to discharge wastewater and connect raw water respectively during regeneration, and the outlets of each sub-filter element can be connected to each other.

2. The integrated electrodialysis filtration device according to claim 1, characterized in that: The inlet and outlet of both the composite filter element and the electrodialysis filter element are located at their axial ends near the water circuit board assembly.

3. The integrated electrodialysis filtration device according to claim 2, characterized in that: The sub-filter element includes an outer cylinder, an electrodialysis membrane stack, and an electrode assembly. The outer cylinder has an internal cavity, and the inlet and outlet are both located on the outer cylinder and connected to the cavity. The electrodialysis membrane stack is coaxially arranged in the receiving cavity, and a gap communicating with the water inlet is provided between the electrodialysis membrane stack and the radial cavity wall of the receiving cavity. The electrodialysis membrane stack includes a central tube, a membrane assembly wound and sleeved on the central tube, and a sealing cap that seals and fixes the axial end faces of the membrane assembly. Several water permeable holes are opened on the central tube. The electrode assembly includes an inner support inside the central tube, an outer support outside the membrane assembly, and electrode wires wound on the inner support and the outer support. The inner support has an axially extending channel that communicates with the outlet, and the inner support has a water outlet corresponding to the electrodialysis membrane stack that communicates with the channel.

4. The integrated electrodialysis filtration device according to claim 3, characterized in that: The outer cylinder includes a cylinder body with the accommodating cavity inside and an opening at one axial end, and an end cap detachably installed at the opening. The end cap is located near the water circuit board assembly. The water inlet and the water outlet are both located on the end cap, and the electrode wire can pass through the end cap of any of the sub-filter elements.

5. The integrated electrodialysis filtration device according to claim 4, characterized in that: The electrode wire has an insulating layer on its surface, and a sealing sleeve is fitted where the electrode wire passes through the end cap. The end cap has a through hole for the electrode wire to pass through, and a groove is provided on the outer end face of the end cap to fix the electrode wire.

6. The integrated electrodialysis filtration device according to claim 4, characterized in that: The water inlet is set at the highest point of the inner wall of the cylinder, and / or the device body or the electrodialysis filter element is tilted so that the water inlet is tilted upward, and the wastewater channel extends horizontally and / or vertically upward along the flow direction of the wastewater. The outlet is provided corresponding to the channel, and the inner support is provided with the water inlet at the end of the electrodialysis membrane stack away from the outlet.

7. The integrated electrodialysis filtration device according to claim 6, characterized in that: The inlet and outlet of each of the sub-filter elements are located at the axial end of the electrodialysis filter element where the inlet and outlet are provided, and the axial end of the electrodialysis filter element is provided with the end cap of the sub-filter element at the end. The inlet of the other sub-filter elements is installed on the end cap of the axial end through an extension pipe. The channel of the other sub-filter elements is connected to the outlet of the corresponding end cap of the axial end through a coaxial outlet pipe, and the outlet pipe is sleeved in the inner support on its extension path.

8. The integrated electrodialysis filtration device according to claim 7, characterized in that: Each of the aforementioned inlets has an extension section that extends horizontally outward perpendicular to the axial direction and is staggered.

9. The integrated electrodialysis filtration device according to any one of claims 1-8, characterized in that: The electrodialysis filter cartridges are stacked vertically and arranged in parallel at least two, and the water outlet channels corresponding to the at least two electrodialysis filter cartridges are connected.

10. A water purifier, characterized in that, include: The integrated electrodialysis filtration device according to any one of claims 1-9.

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