CN114162935B

CN114162935B - Water purification system, control method thereof and water purification equipment

Info

Publication number: CN114162935B
Application number: CN202110559617.7A
Authority: CN
Inventors: 刘亚涛; 魏中科; 吴启军; 全永兵; 王雪青; 叶耀泽; 李豪
Original assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Current assignee: Foshan Midea Qinghu Water Purification Equipment Co ltd; Midea Group Co Ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2024-01-05
Anticipated expiration: 2041-05-21
Also published as: CN114162935A

Abstract

The invention discloses a water purification system, a control method thereof and water purification equipment, wherein the water purification system comprises: a water tank; the first detector is used for detecting the total dissolved solid value of the water inlet of the water purification system to obtain the TDS of the inlet water; the water pump is connected to the waterway of the water purification system; electrodialysis membrane stack and water outlet; the waterway switching device is respectively connected with the water pump, the water tank, the electrodialysis membrane stack and the water outlet and is used for switching waterways of the water purifying system; and the controller is used for determining the reverse pole time according to the water inflow TDS, determining a water making mode according to the reverse pole time and controlling the applied voltages of the water pump, the waterway switching device and the electrodialysis membrane stack according to the determined water making mode when the water purifying system is used for making water. The water purification system can timely switch waterways and water making modes according to the water quality of the inlet water of the water purification system, so that the scaling time in the electrodialysis membrane stack is prolonged, the cleaning times of the electrodialysis membrane stack are reduced, and the service life of the electrodialysis membrane stack is prolonged.

Description

Water purification system, control method thereof and water purification equipment

Technical Field

The invention relates to the technical field of water purification, in particular to a water purification system, a control method thereof and water purification equipment.

Background

The electrodialysis is applied to the household water purifier and has the following advantages: the fresh water quality is adjustable, the recovery rate is high, and the purified water outlet proportion can reach 90%. Based on the advantages, electrodialysis has great application potential in the field of household water purifiers.

For electrodialysis membrane stacks, in the frequent water purification process, one end of the membrane stack can adsorb a large amount of ions, wherein calcium and magnesium ions are most, and in the long-term use process, scale such as calcium carbonate and magnesium carbonate can be formed, so that the membrane stack is blocked and bears pressure, the water purification capacity is reduced, and even the water purification capacity is lost. Therefore, providing a water purification system capable of effectively prolonging the service life of an electrodialysis membrane stack is a problem to be solved by those skilled in the art

Disclosure of Invention

The present invention aims to solve at least one of the technical problems in the related art to some extent. Therefore, an object of the present invention is to provide a control method of a water purification system, so as to switch the waterway and the water making mode of the water purification system according to the water quality of the water purification system, which has the advantage of effectively prolonging the service life of the electrodialysis membrane stack.

A second object of the present invention is to provide a control method of a water purification system.

A third object of the present invention is to propose a computer readable storage medium.

A fourth object of the present invention is to propose an electronic device.

A fifth object of the present invention is to provide a water purifying apparatus.

To achieve the above object, an embodiment of a first aspect of the present invention provides a water purification system, the system comprising: a water tank; the first detector is used for detecting the total dissolved solid value of the inlet water of the water purification system to obtain inlet water TDS; the water pump is connected to the waterway of the water purification system; electrodialysis membrane stack and water outlet; the waterway switching device is respectively connected with the water pump, the water tank, the electrodialysis membrane stack and the water outlet and is used for switching waterways of the water purifying system; the controller is respectively connected with the first detector, the waterway switching device and the water pump, and is used for determining the time of inverting the pole according to the TDS of the water inflow, determining the water making mode according to the time of inverting the pole, and controlling the applied voltage of the water pump, the waterway switching device and the electrodialysis membrane stack according to the determined water making mode when the water purifying system prepares water.

According to the water purification system provided by the embodiment of the invention, the waterway switching device is arranged among the water pump, the water tank, the electrodialysis membrane stack and the water outlet, and the waterway and the water making mode of the water purification system are switched in time by the controller according to the water inlet condition of the water purification system, so that the scaling time in the electrodialysis membrane stack is prolonged, the cleaning times of the electrodialysis membrane stack are reduced, and the service life of the electrodialysis membrane stack is prolonged.

In addition, the water purification system according to the above embodiment of the present invention may further have the following additional technical features:

according to one embodiment of the invention, the water tank comprises a raw water tank and a wastewater tank, the electrodialysis membrane stack comprises a first water chamber and a second water chamber, and the waterway switching device comprises: the water pump comprises a first flow valve, a second flow valve and a third flow valve, wherein one end of the first flow valve is connected with the water pump, the other end of the first flow valve is connected with one end of the second flow valve to form a first node, the other end of the second flow valve is connected with the water inlet end of the first water chamber, one end of the third flow valve is connected with the first node, and the other end of the third flow valve is connected with the water inlet end of the second water chamber; the device comprises a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, wherein one end of the first electromagnetic valve is connected with the water outlet, one end of the second electromagnetic valve is connected with the wastewater tank, one end of the third electromagnetic valve is connected with the other end of the first electromagnetic valve to form a second node, one end of the fourth electromagnetic valve is connected with the original water tank, the other end of the second electromagnetic valve is connected with the other end of the fourth electromagnetic valve to form a third node, the other end of the third electromagnetic valve is connected with the other end of the fourth electromagnetic valve to form a fourth node, and the fourth node is connected with the third node; the first end of the four-way valve is connected with the water outlet end of the first water chamber of the electrodialysis membrane stack, the second end of the four-way valve is connected with the second node, the third end of the four-way valve is connected with the third node, and the fourth end of the four-way valve is connected with the water outlet end of the second water chamber of the electrodialysis membrane stack; the controller is respectively connected with the first flow valve, the second flow valve, the third flow valve, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the four-way valve.

According to one embodiment of the invention, the system comprises: the preposed filter element is arranged on the water inlet side of the electrodialysis membrane stack; and the rear filter element is arranged on the water outlet side of the electrodialysis membrane stack.

According to one embodiment of the invention, the system comprises: the second detector is used for detecting the total dissolved solid value of the water discharged by the water purification system to obtain the TDS of the discharged water; wherein the controller is further connected to the second detector for adjusting the voltage applied to the electrodialysis stack in accordance with the effluent TDS.

According to one embodiment of the invention, the system further comprises: the power supply is connected with the electrodialysis membrane stack and is used for supplying power to the electrodialysis membrane stack; the controller is also connected with the power supply and used for adjusting the polarity of the voltage applied to the electrodialysis membrane stack by the power supply according to the water making mode.

To achieve the above object, an embodiment of the present invention provides a control method of a water purification system, the water purification system including a water tank, a water pump, an electrodialysis membrane stack, a waterway switching device, and a water outlet, wherein the water pump is connected to a waterway of the water purification system, and the waterway switching device is respectively connected to the water pump, the water tank, the electrodialysis membrane stack, and the water outlet, the method includes the following steps: obtaining inflow TDS, wherein the inflow TDS is the total dissolved solid value of inflow water of the water purification system; determining the inverting time according to the inflow TDS; determining a water pattern according to the polarity reversing time; and when the water purification system prepares water, controlling the applied voltages of the water pump, the waterway switching device and the electrodialysis membrane stack according to the determined water preparation mode.

According to the control method of the water purification system, according to the water inlet condition of the water purification system, the waterway and the water making mode of the water purification system are switched in time, so that the scaling time in the electrodialysis membrane stack is prolonged, the cleaning times of the electrodialysis membrane stack are reduced, and the service life of the electrodialysis membrane stack is prolonged.

In addition, the control method of the water purification system according to the above embodiment of the present invention may further have the following additional technical features:

according to one embodiment of the invention, the determining the inversion time according to the influent TDS includes: detecting that the water inflow TDS is smaller than a first preset value, and determining the polarity inverting time as first time; detecting that the water inflow TDS is larger than or equal to the first preset value and smaller than a second preset value, and determining the polarity reversing time to be second time, wherein the second time is smaller than the first time; and detecting that the water inflow TDS is larger than or equal to the second preset value, and determining the pole reversing time to be third time, wherein the third time is smaller than the second time.

According to one embodiment of the present invention, the determining the water pattern according to the inversion time includes: when the water purification system produces water, recording the water consumption time of the water purification system in the current water production mode; comparing the water use time with the pole inversion time; when the water consumption time is less than or equal to the pole reversing time, the water making mode is not switched; when the water use time is longer than the pole inversion time, switching a water making mode; wherein the water producing mode comprises positive electricity water producing and reverse electricity water producing.

According to one embodiment of the invention, the water tank comprises a raw water tank and a wastewater tank, the electrodialysis membrane stack comprises a first water chamber and a second water chamber, the waterway switching device comprises a first flow valve, a second flow valve, a first electromagnetic valve, a second electromagnetic valve, a third electromagnetic valve and a fourth electromagnetic valve, wherein one end of the first flow valve is connected with the water pump, the other end of the first flow valve is connected with one end of the second flow valve to form a first node, the other end of the second flow valve is connected with the water inlet end of the first water chamber of the electrodialysis membrane stack, one end of the third flow valve is connected with the first node, and the other end of the third flow valve is connected with the water inlet end of the second water chamber of the electrodialysis membrane stack; one end of the first electromagnetic valve is connected with the water outlet, one end of the second electromagnetic valve is connected with the wastewater tank, one end of the third electromagnetic valve is connected with the other end of the first electromagnetic valve to form a second node, one end of the fourth electromagnetic valve is connected with the original water tank, the other end of the second electromagnetic valve is connected with the other end of the fourth electromagnetic valve to form a third node, the other end of the third electromagnetic valve is connected with the other end of the fourth electromagnetic valve to form a fourth node, and the fourth node is connected with the third node; the first end of the four-way valve is connected with the water outlet end of the first water chamber, the second end of the four-way valve is connected with the second node, the third end of the four-way valve is connected with the third node, and the fourth end of the four-way valve is connected with the water outlet end of the second water chamber; the controlling of the applied voltages of the water pump, the waterway switching device and the electrodialysis membrane stack according to the determined water making mode comprises the following steps: the third flow valve is controlled to be closed, the first flow valve and the second flow valve are controlled to be opened, the first electromagnetic valve and the second electromagnetic valve are controlled to be opened, the first end and the second end of the four-way valve are controlled to be communicated, the third end and the fourth end of the four-way valve are controlled to be communicated, the third electromagnetic valve and the fourth electromagnetic valve are controlled to be closed, and the water pump is controlled to be started; or controlling the second flow valve to be closed, controlling the first flow valve and the third flow valve to be opened, controlling the first electromagnetic valve and the second electromagnetic valve to be opened, controlling the first end of the four-way valve to be communicated with the third end, controlling the second end to be communicated with the fourth end, controlling the third electromagnetic valve and the fourth electromagnetic valve to be closed, and controlling the water pump to be started.

According to one embodiment of the invention, the method further comprises: obtaining effluent TDS, and determining current applied to the electrodialysis membrane stack and pump water flow of the water pump according to the effluent TDS, wherein the effluent TDS is a total dissolved solid value of effluent of the water purification system; and controlling the power supply of the electrodialysis membrane stack according to the current and the water making mode, controlling the water pump according to the water flow of the pump, and controlling the waterway switching device to make water.

According to one embodiment of the present invention, when the water usage time is greater than the reverse pole time, switching the water making mode includes: and controlling the first flow valve, the second flow valve, the third flow valve, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the four-way valve to be fully closed, and resetting the water consumption time.

To achieve the above object, an embodiment of a third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon, which when executed by a processor, implements a control method of a water purification system as set forth in the embodiment of the second aspect of the present invention.

To achieve the above object, an embodiment of the fourth aspect of the present invention provides an electronic device, including a memory and a processor, where the memory stores a computer program, and when the computer program is executed by the processor, the control method of the water purifying system according to the embodiment of the second aspect of the present invention is implemented.

To achieve the above object, an embodiment of a fifth aspect of the present invention provides a water purifying apparatus, including a water purifying system as set forth in the embodiment of the first aspect of the present invention, or an electronic apparatus as set forth in the embodiment of the fourth aspect of the present invention.

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

Drawings

Fig. 1 is a schematic diagram of a water purification system according to an embodiment of the present invention;

fig. 2 is a schematic diagram of an installation structure of a waterway switching device according to an embodiment of the present invention;

FIG. 3 is a flow chart illustrating a control method of a water purification system according to an embodiment of the present invention;

FIG. 4 is a flow chart of a water purifying system according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a water purifying apparatus according to an embodiment of the present invention;

FIG. 6 is an exploded view of a four-way valve according to one embodiment of the present invention;

FIG. 7 is a schematic view of a partial structure of a four-way valve according to an embodiment of the present invention;

FIG. 8 is a schematic diagram of a turntable of a four-way valve according to an embodiment of the present invention;

fig. 9 is a schematic structural view of a turntable of a four-way valve according to an embodiment of the present invention.

Reference numerals illustrate:

1. a water tank; 2. a first detector; 3. a water pump; 4. electrodialysis membrane stack; 5. a water outlet; 6. a waterway switching device; 7. a controller; 8. a second detector; 9. a filter element is arranged in front; 10. a rear filter element; 11. a power supply; 101. a raw water tank; 102. a waste water tank; 401. a first water chamber; 402. a second water chamber; 601. a first flow valve; 602. a second flow valve; 603. a third flow valve; 604. a first electromagnetic valve; 605. a second electromagnetic valve; 606. a third electromagnetic valve; 607. a fourth electromagnetic valve; 608. a four-way valve; 100. a water purification system; 200. a water purifying device; 31. a first inlet; 32 a second inlet; 33. a first outlet; 34. a second outlet; 311. a base; 312. an upper end cap; 3121 mounting holes; 313. a receiving chamber; 320. a flow passage plate; 321. a liquid inlet and a liquid outlet; 322. a liquid outlet; 323. a liquid inlet connection port; 324. a liquid outlet connector; 330. a turntable; 331. a first groove; 332. a second groove; 333. a transmission connection; 350. a driving device.

Description of the preferred embodiments

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.

The water purification system, the control method thereof and the water purification device according to the embodiments of the present invention will be described in detail below with reference to fig. 1 to 9 of the accompanying drawings and specific embodiments.

Fig. 1 is a schematic diagram of a water purification system according to an embodiment of the present invention. As shown in fig. 1, the water purification system 100 includes: the water tank 1, the first detector 2, the water pump 3, the electrodialysis membrane stack 4, the water outlet 5, the waterway switching device 6 and the controller 7.

Specifically, referring to fig. 1, the water tank 1 may include a raw water tank 101 and a waste water tank 102. The raw water tank 101 is used to store raw water, wherein the raw water may be municipal tap water, but is not limited to municipal tap water. The waste water tank 102 may be used to receive waste water flowing from the electrodialysis membrane stack 4 during water production or washing waste water generated during washing of the electrodialysis membrane stack 4. The raw water tank 101 and the waste water tank 102 may be two independent and unconnected tanks, or may be two chambers formed in one tank by providing a partition plate. Preferably, the volume of the raw water tank 101 may be larger than the volume of the waste water tank 102 to ensure the water demand of the user.

The first detector 2 is configured to detect a total dissolved solids value (TDS) of the water fed into the water purification system 100, so as to obtain a TDS of the water fed (Total Dissolved Solids, total dissolved solids value), which may be expressed in milligrams per liter of water, and indicates how many milligrams of dissolved solids are dissolved in each liter of water. In general terms, TDS reflects the condition of water quality, with a higher value of TDS, i.e., more soluble solids dissolved per liter of water, indicating poorer water quality.

As a possible embodiment, a first detector 2 may be disposed at the water outlet side of the raw water tank 101 to detect TDS of raw water flowing out of the raw water tank 101, so as to obtain TDS of water fed from the water purification system 100, i.e., TDS of water fed. Based on the obtained TDS value of the inflow water, it is possible to know how many milligrams of soluble solids are dissolved in each liter of raw water, and the quality of the raw water, i.e., the quality of the inflow water of the water purification system 100 is detected. Wherein the first detector 2 may employ a TDS sensor.

The water pump 3 is connected to the water path of the water purification system 100 to supply water power to the water purification system 100. In an embodiment of the invention, a water pump 3 may be arranged between the raw water tank 101 and the electrodialysis membrane stack 4 for feeding raw water from the raw water tank 101 into the electrodialysis membrane stack 4. Wherein the maximum pump water flow rate of the water pump 3 can be 1000mL/min.

The electrodialysis membrane stack 4 is used for receiving the inlet water of the water purification system 100 and purifying the inlet water of the water purification system 100 to obtain purified water. The electrodialysis membrane stack 4 can purify the water body through electrodialysis technology, can prepare purified water with adjustable TDS (total dissolved solids), and has the advantages of adjustable fresh water quality, high recovery rate, 90% of purified water outlet ratio and the like. In the embodiment of the invention, the electrodialysis is preferably frequent reverse pole electrodialysis, and the working principle of the frequent reverse pole electrodialysis is as follows: the electrodialysis membrane stack is an electrochemical water purification module consisting of an ion exchange membrane, a runner and electrodes, ions are driven by an electric field to directionally move, and are influenced by selective permeation of the ion exchange membrane to produce dense-thin water separation. Under the action of an electric field, the ordered arrangement of the anion-cation exchange membranes divides the frequent reverse pole electrodialysis membrane stack into an ordered purification water chamber and an ordered concentration water chamber. The water purification capacity of the EDR membrane stack is affected by external voltage, and the target water quality can be controlled by adjusting the external voltage. In the running process, the polarities of the positive electrode and the negative electrode of the electrodialysis membrane stack are switched once every certain time, dirt formed on the surfaces of the ion exchange membrane and the electrodes can be automatically cleaned, and the long-term stability of the efficiency of the ion exchange membrane and the quality and the water quantity of fresh water are ensured. When the polarity of the electrode is reversed, the polarity of the electrode is exchanged, and the thick chamber, the thin chamber and the thick fresh water path are exchanged. It should be understood that "inverting" refers to reversing the polarities of the positive electrode and the negative electrode once, for example, the electrodialysis membrane stack is provided with a first electrode and a second electrode, the first electrode is currently a positive electrode, the second electrode is a negative electrode, and after inverting, the first electrode is a negative electrode, and the second electrode is a positive electrode.

Wherein the electrodialysis stack 4 may comprise a first water chamber 401 and a second water chamber 402, each of which may have an inlet and an outlet.

The waterway switching device 6 is respectively connected with the water pump 3, the water tank 1, the electrodialysis membrane stack 4 and the water outlet 5 and is used for switching waterways of the water purifying system 100. When the water purification system 100 changes the water making mode, the water way switching device 6 is arranged, and the states of all valves of the water way switching device 6 are adjusted to switch the water way of the water purification system 100 so as to ensure that the water way of the water purification system 100, through which the purified water and the wastewater flow, cannot be disordered, and the water making effect of the water purification system 100 is not influenced by the change of the water making mode.

The controller 7 is respectively connected with the first detector 2, the waterway switching device 6 and the water pump 3, and is used for determining the inverting time according to the inflow water TDS, determining a water making mode according to the inverting time, and controlling the applied voltages of the water pump 3, the waterway switching device 6 and the electrodialysis membrane stack 4 according to the determined water making mode when the water purifying system prepares water.

In the embodiment of the present invention, the controller 7 may be a single chip microcomputer or a PC, and is electrically connected to the first detector 2, the waterway switching device 6, and the water pump 3, and is configured to receive the incoming water TDS detected by the first detector 2, determine the time to reverse the pole according to the incoming water TDS by looking up a table, determine the water making mode of the water purifying system 100 according to the time to reverse the pole, and control the waterway switching device 6 to switch the waterway of the water purifying system 100 according to the determined water making mode when the water purifying system 100 makes water, and start and control the water supply of the water pump 3 and control the voltage applied to the electrodialysis membrane stack according to the need.

Therefore, the water purification system provided by the embodiment of the invention can timely switch the waterway and the water making mode according to the water quality condition of the water inlet of the water purification system, so that the scaling time in the electrodialysis membrane stack is prolonged, the cleaning times of the electrodialysis membrane stack are reduced, and the service life of the electrodialysis membrane stack is prolonged.

As one possible embodiment, referring to fig. 2, waterway switching device 6 may include three flow valves, four solenoid valves, and one four-way valve 608. Wherein, the three flow valves are respectively marked as a first flow valve 601, a second flow valve 602 and a third flow valve 603, the four solenoid valves are respectively marked as a first solenoid valve 604, a second solenoid valve 605, a third solenoid valve 606 and a fourth solenoid valve 607, the four-way valve 608 has two water inlet ends and two water outlet ends, the two water inlet ends are respectively a first end and a fourth end, and the two water outlet ends are respectively a second end and a third end.

In this embodiment, as shown in fig. 6-9, four-way valve 608 may include a housing, a flow disk 320, and a turntable 330.

The housing is provided with a receiving chamber 313 therein, and an inlet and an outlet communicating with the receiving chamber 313 are formed in the housing. The flow path plate 320 is disposed in the accommodation chamber 313. The flow path plate 320 may itself define a liquid inlet chamber in communication with the inlet and a liquid outlet chamber in communication with the outlet, or the flow path plate 320 may cooperate with the housing to define a liquid inlet chamber in communication with the inlet and a liquid outlet chamber in communication with the outlet. The runner plate 320 is further formed with a liquid inlet 321 and a liquid outlet 322, the liquid inlet 321 is communicated with the liquid inlet cavity, and the liquid outlet 322 is communicated with the liquid outlet cavity. The rotary plate 330 is rotatably disposed in the accommodating cavity 313, and the rotary plate 330 is used for connecting or disconnecting the liquid inlet 321 and the liquid outlet 322.

The four-way valve 608 in this embodiment is disposed on the flow path plate 320, so that the flow path plate 320 can define a liquid inlet chamber and a liquid storage chamber, so as to separate a chamber communicating with the inlet and a chamber communicating with the outlet in the housing. Through setting up carousel 330, can utilize carousel 330 control feed liquor to cross the intercommunication state of mouth 321 and play liquid through the mouth 322 to can reliably control whether import and export communicate, be convenient for simplify the control mode and the control logic of cross valve 608, simplify the structure of cross valve 608, improve the switching effect and the switching reliability of cross valve 608.

Therefore, in this embodiment, the four-way valve 608 has advantages of simple control, reliable switching structure, and the like.

The four-way valve 608 in this embodiment is described below with reference to the drawings. As shown in fig. 6-9, four-way valve 608 may include a housing, a flow path disk 320, and a rotating disk 330.

Specifically, as shown in fig. 6, the flow channel plate 320 is provided with a liquid inlet connection port 323, the liquid inlet connection port 323 communicates with the liquid inlet chamber, and the liquid inlet connection port 323 communicates with the inlet. So that the inlet connection port 323 can communicate the inlet chamber with the inlet. The runner plate 320 is provided with a liquid outlet connection port 324, the liquid outlet connection port 324 is communicated with the liquid outlet cavity, and the liquid outlet connection port 324 is communicated with the outlet. So that the outlet connection port 324 can communicate the outlet chamber with the outlet. Thus, the flow path plate 320 may be used to separate a liquid inlet chamber communicating with the inlet and a liquid outlet chamber communicating with the outlet, thereby controlling the connection state of the inlet and the outlet.

Specifically, as shown in fig. 6, the flow path plate 320 is detachably provided in the accommodating chamber 313, and the flow path plate 320 is fixedly provided in the accommodating chamber 313 in a state where the flow path plate 320 is mounted in place. The liquid inlet connection port 323 and the liquid outlet connection port 324 are formed at a side circumferential surface of the flow path plate 320 at an interval, and the liquid inlet port 321 and the liquid outlet port 322 are formed at an end surface of the flow path plate 320 at an interval. Thus, the liquid flowing in from the inlet enters the liquid inlet cavity through the liquid inlet connector 323 and flows out of the liquid inlet cavity from the liquid inlet through hole 321, when the turntable 330 is communicated with the liquid inlet through hole 321 and the liquid outlet through hole 322, the liquid can flow into the liquid outlet cavity from the liquid outlet through hole 322, flows out of the liquid outlet cavity from the outlet, and flows out of the outlet, so that the smooth flow of the liquid in the four-way valve 608 is realized.

In some embodiments, the turntable 330 may be disposed at one end of the flow channel plate 320, and the turntable 330 has a concave communication groove that can be used to connect or disconnect the inlet 321 and outlet 322. For example, when the rotary disk 330 rotates to the first position, at least a part of the communication groove is respectively connected with the liquid inlet 321 and the liquid outlet 322, so that liquid can flow from the liquid inlet 321 to the liquid outlet 322 through the communication groove, and when the rotary disk rotates to the second position, the communication groove is staggered from the liquid inlet 321 and the liquid outlet 322, and at the moment, the liquid inlet 321 and the liquid outlet 322 are blocked by the rotary disk 330 to be closed. Thus, the relative positions of the communication groove and the runner plate 320 can be changed by rotating the turntable 330, so that the relative positions of the communication groove and the inlet 321 and the outlet 322 can be controlled to control the connection or disconnection of the inlet 321 and the outlet 322.

Specifically, as shown in fig. 6, a side surface of the turntable 330 facing the flow path plate 320 is concaved inward to form a communication groove, and a side surface of the turntable 330 facing away from the flow path plate 320 is provided with a transmission connection part 333 adapted to be connected to an external transmission structure. This enables reliable rotation of the rotary plate 330, so that the position of the communication groove can be reliably controlled.

For example, the turntable 330 may be formed into a cylindrical structure, and one side end surface of the cylinder is fitted to the end surface of the runner plate 320 provided with the liquid inlet 321, and the side end surface of the turntable 330 is provided with a communication groove. The other end face of the cylinder is provided with a transmission connection part 333. The rotational axis of the turntable 330 coincides with the central axis of the cylinder.

In some embodiments, as shown in fig. 6, the housing may include a base 311 and an upper end cap 312, an inlet and an outlet being formed in the base 311, respectively, the upper end cap 312 being detachably provided on the base 311, the base 311 and the upper end cap 312 defining a receiving chamber 313 therebetween. Thus, the processing and manufacturing of the shell are facilitated, parts of the four-way valve 608 are conveniently assembled in the shell, and the assembly and maintenance of the four-way valve 608 are facilitated.

For example, the housing may include a base 311 and an upper end cap 312, the upper end cap 312 is detachably fastened to the base 311, and the base 311 and the upper end cap 312 are connected by a threaded fastener. The threaded fasteners are a plurality of and are spaced apart along the circumference of the housing. The inlet and the outlet are formed on side circumferential surfaces of the base 311, respectively, and a receiving chamber 313 is defined between the base 311 and the upper end cap 312.

In some embodiments, as shown in fig. 6, the inlet may include a first inlet 31 and a second inlet 32 disposed at intervals, the outlet may include a first outlet 33 and a second outlet 34 disposed at intervals, the first inlet 31, the second inlet 32, the first outlet 33 and the second outlet 34 are disposed at equal intervals along a circumferential direction of the housing, the first inlet 31 is disposed opposite the second inlet 32, and the first outlet 33 is disposed opposite the second outlet 34. Thus, the four-way valve 608 can be connected with two liquid inlet pipes and two liquid outlet pipes, so that the connection state of the liquid inlet pipes and the liquid outlet pipes is controlled. For example, the four-way valve 608 may communicate with the first inlet 31 and the first outlet 33 and with the second inlet 32 and the second outlet 34 in the first state and may communicate with the first inlet 31 and the second outlet 34 and with the second inlet 32 and the first outlet 33 in the second state, thereby achieving reliable switching of the piping.

Specifically, as shown in fig. 7, the rotary table 330 is provided with a communication groove, which may include a first groove 331 and a second groove 332, the rotary table 330 being rotatable between a first position and a second position, the first groove 331 being capable of communicating the first inlet 31 and the first outlet 33, and the second groove 332 being capable of communicating the second inlet 32 and the second outlet 34 when the rotary table 330 is rotated to the first position. This allows a line connection. When the dial 330 is rotated to the second position, the first groove 331 can communicate with the first inlet 31 and the second outlet 34, and the second groove 332 can communicate with the second inlet 32 and the first outlet 33. This allows for another way of connecting the lines.

Further, the first groove 331 and the second groove 332 extend along the circumferential direction of the turntable 330 and are disposed on the turntable 330 at intervals, the turntable 330 can rotate back and forth between the first position and the second position, and the rotation angle of the turntable 330 is set to be less than 180 degrees. For example, the rotation angle of the turntable 330 may be 150 degrees, 120 degrees, or 90 degrees.

Specifically, the first groove 331 and the second groove 332 extend along a circumferential direction of the turntable 330 and are disposed opposite to each other on the turntable 330, and the turntable 330 can rotate back and forth between a first position and a second position, and a rotation angle of the turntable 330 is 90 degrees.

In some embodiments, as shown in fig. 6, the four-way valve 608 further includes a driving device 350, where the driving device 350 is disposed on the housing, and the driving device 350 is provided with a rotatable shaft, and the shaft can be in driving connection with the turntable 330. Thus, the driving device 350 can drive the turntable 330 to rotate, so as to realize an accurate and reliable action process of the turntable 330.

Specifically, the driving device 350 may be provided at an outer side of the housing having the mounting hole 3121, the mounting hole 3121 being in communication with the accommodating chamber 313, and the rotation shaft being capable of extending into the accommodating chamber 313 through the mounting hole 3121. Thus, the installation and the arrangement of the driving device 350 are convenient, the protection of the driving device 350 is convenient, and the driving device 350 is convenient to be in transmission connection with the turntable 330.

Specifically, the driving device 350 may be a motor, which is mounted on an outer surface of the housing, and a rotation shaft of the motor is inserted into the receiving chamber 313 through the mounting hole 3121 to be coupled with the rotation plate 330.

Alternatively, the driving device 350 may be provided with a signal receiver for receiving the driving signal. Thus, the driving device 350 can perform forward rotation or reverse rotation according to the received driving signal, so as to drive the turntable 330 to perform forward rotation or reverse rotation.

For example, the driving signal may be a pulse signal, and the motor may receive a positive pulse signal with a fixed number of pulses or a negative pulse signal with a fixed number of pulses.

In some embodiments of the present invention, four-way valve 608 is used in water purification system 100. The four-way valve 608 consists of a motor, an upper end shell, a rotating shaft, a rotating disc 330, a sealing ring, a runner disc 320 and a base 311, and the main core components are the runner disc 320 and the rotating disc 330. The four-way valve has two working states in total. When the four-way valve starts to work, the motor does not work, the initial state of the rotary disc 330 is as shown in fig. 8, and the first end is communicated with the second end and the third end is communicated with the fourth end through the communication groove of the rotary disc 330. When the motor receives a positive pulse signal with a fixed pulse number, the output torque rotates the rotary disk 330 clockwise by 90 degrees, and the state is as shown in fig. 9, and the first end is communicated with the third end, and the second end is communicated with the fourth end through the rotary disk 330 communicating groove. When the pole is reversed again, the motor receives a reverse pulse signal with a fixed pulse number, the output torque enables the rotary table 330 to rotate 90 degrees anticlockwise, and the first end is communicated with the second end and the third end is communicated with the fourth end through the rotary table 330 communicating groove. The turntable 330 rotates once every time the motor receives a pulse signal. The electric control program is used for giving out signals to the motor, so that the flow channel of the four-way valve can be controlled, the automatic switching of the waterway is realized, and the complexity of the system is greatly reduced.

In some examples, the four-way valve 608 is connected to the water purification system 100, the first end and the fourth end channels of the four-way valve are respectively connected to two water outlet channels of the membrane stack, and the second end and the third end channels of the four-way valve are respectively connected to a pure water channel and a waste water channel of the system. Through the electronic control to the four-way valve, in the water making process of the electrodialysis membrane stack before and after the inversion, the pure water waterway is ensured to only flow out the purified water, the waste water waterway only flows out the concentrated water, and the effluent quality is ensured not to be influenced by the inversion of the electrodialysis membrane stack. When the electrodialysis membrane stack positively charges water, the four-way valve is not electrified, the first end of the four-way valve is communicated with the second end, and the third end of the four-way valve is communicated with the fourth end; after raw water enters the membrane stack, through the action of an electric field, one path of purified water and one path of concentrated water are separated from the membrane stack, the purified water and the concentrated water are respectively connected into the four-way valve through the first end flow channel and the fourth end flow channel, the purified water flows out of the pure water waterway through the second port of the four-way valve, and the concentrated water flows out of the waste water waterway through the third port of the four-way valve. When water is produced by reverse electricity after the polarity is reversed, the four-way valve is powered to enable the turntable 330 to rotate 90 degrees clockwise, the first end is communicated with the third end, and the second end is communicated with the fourth end; after raw water enters the membrane stack, through the action of an electric field, one path of purified water and one path of concentrated water are separated from the membrane stack, are respectively connected into the four-way valve through the fourth end and the first end, flow out of the pure water waterway through the second end of the four-way valve through the internal flow channel of the four-way valve, and flow out of the waste water waterway through the third end of the four-way valve. After the reverse electricity water making is finished, the reverse electrode is conducted again, at the moment, the four-way valve is powered up to enable the rotary table 330 to rotate 90 degrees anticlockwise, the first end flow channel is communicated with the second end flow channel through the rotary table 330 communicating groove, and the third end flow channel is communicated with the third end flow channel to conduct positive electricity water making.

By utilizing the electric control of the four-way valve, in the positive electricity water making process and the reverse electricity water making process after the reverse electrode of the electrodialysis membrane stack, the pure water waterway is ensured to always only output purified water, the waste water waterway is ensured to always output concentrated water, and the water quality of the discharged water is ensured to the greatest extent. By adding the four-way valve, the intelligent self-cleaning of the EDR control system is realized while the complexity of the system is greatly reduced by replacing the functions of the traditional four electromagnetic valves.

As shown in fig. 2, the water pump 3 is connected to one end of the first flow valve 601, the other end of the first flow valve 601 is connected to one end of the second flow valve 602 to form a first node, the other end of the second flow valve 602 is connected to the water inlet end of the first water chamber 401, the first node is connected to one end of the third flow valve 603, and the other end of the third flow valve 603 is connected to the water inlet end of the second water chamber 402.

In this embodiment, the first flow valve 601, the second flow valve 602 and the third flow valve 603 may be electromagnetic flow valves, and the flow rate of the electromagnetic flow valves may be controlled and controlled by the controller 7. The electromagnetic valve is a valve body controlled by electromagnetic, and the working principle is as follows: there is inclosed chamber in the solenoid valve, open in different positions has the through-hole, every hole connects different oil pipes, be the piston in the middle of the chamber, two electro-magnets are on the two sides, the magnet coil circular telegram valve body on which side will be attracted to the limit, open or close different oil drain hole through the removal of control valve body, and the inlet port is normally open, hydraulic oil will get into different oil drain pipe, then promote the piston of hydro-cylinder through the pressure of oil, the piston drives the piston rod again, the piston rod drives mechanical device, consequently the electric current break-make of control electro-magnet just can control mechanical motion.

Among them, the second flow valve 602 and the third flow valve 603 are preferably electromagnetic flow valves of the same type. In this embodiment, the maximum flow rate of the first flow valve 601 is greater than the maximum flow rate of the second flow valve 602 and greater than the maximum flow rate of the third flow valve 603, such as 1500 for the first flow valve 601 and 300 for both the second flow valve 602 and the third flow valve 603.

In this embodiment, referring to fig. 2, a second flow valve 602 is connected at one end to the water inlet end of the first water chamber 401 of the electrodialysis membrane stack 4, and a third flow valve 603 is connected at one end to the water inlet end of the second water chamber 402 of the electrodialysis membrane stack 4; and the other ends of the second flow valve 602 and the third flow valve 603 are connected to one end of the water pump 3 through the first flow valve 601. Therefore, in the case of turning on the water pump 3 and the first flow valve 601, controlling the second flow valve 602 and the third flow valve 603 can control the inflow direction of raw water, i.e., turning on the second flow valve 602, closing the third flow valve 603, raw water enters the first water chamber 401 of the electrodialysis membrane stack 4, turning on the third flow valve 603, closing the second flow valve 602, raw water enters the second water chamber 402 of the electrodialysis membrane stack 4.

Referring to fig. 2, one end of the first solenoid valve 604 is connected with the water outlet, one end of the second solenoid valve 605 is connected with the waste water tank, one end of the third solenoid valve 606 is connected with the other end of the first solenoid valve 604 to form a second node, one end of the fourth solenoid valve 607 is connected with the original water tank, the other end of the second solenoid valve 605 is connected with the other end of the fourth solenoid valve 607 to form a third node, the other end of the third solenoid valve 606 is connected with the other end of the fourth solenoid valve 607 to form a fourth node, and the fourth node is connected with the third node. The first end of the four-way valve 608 is connected with the water outlet end of the first water chamber 401, the second end of the four-way valve 608 is connected with the second node, the third end of the four-way valve 608 is connected with the third node, and the fourth end of the four-way valve 608 is connected with the water outlet end of the second water chamber 402.

In this embodiment, referring to fig. 2, a first end of the four-way valve 608 is connected to the water outlet end of the first water chamber 401 of the electrodialysis membrane stack 4, a fourth end of the four-way valve 608 is connected to the water outlet end of the second water chamber 402 of the electrodialysis membrane stack 4, a second end of the four-way valve 608 is connected to the raw water tank 101 through a third solenoid valve 606 and a fourth solenoid valve, a third end of the four-way valve 608 is connected to the waste water tank through a second solenoid valve 605, and a second end of the four-way valve 608 is also connected to the water outlet 5 through a first solenoid valve 604.

The four-way valve 608 is adjusted, so that the first end of the four-way valve 608 is communicated with the second end of the four-way valve 608, and when the third end of the four-way valve 608 is communicated with the fourth end of the four-way valve 608, water flowing out from the water outlet end of the first water chamber 401 of the electrodialysis membrane stack 4 can flow to the first end of the four-way valve 608, the second end of the four-way valve 608 and the first node in sequence. Further, adjusting the first solenoid valve 604, the third solenoid valve 606, the fourth solenoid valve 607 may further control the water flow direction. Water flowing from the water outlet end of the second water chamber 402 of the electrodialysis membrane stack 4 can flow to the fourth end of the four-way valve 608, the third end of the four-way valve 608, the second electromagnetic valve 605 and the wastewater tank in sequence.

When the first end of the four-way valve 608 is communicated with the third end of the four-way valve 608 and the second end of the four-way valve 608 is communicated with the fourth end of the four-way valve 608, water flowing out of the water outlet end of the first water chamber 401 of the electrodialysis membrane stack 4 flows to the first end of the four-way valve 608, the third end of the four-way valve 608, the second electromagnetic valve 605 and the wastewater tank in sequence, and water flowing out of the water outlet end of the second water chamber 402 of the electrodialysis membrane stack 4 flows to the second end of the four-way valve 608, the fourth end of the four-way valve 608 and the third node in sequence. Further, adjusting the second, third, and fourth solenoid valves 605, 606, 607 may further control the water flow direction.

Therefore, the state of each valve of the waterway switching device 6 can be adjusted to control the waterway of the water purification system 100, so that the electrodialysis membrane stack 4 can ensure that the water outlet 5 only flows out of purified water and the wastewater tank 102 only flows into concentrated wastewater in the water preparation process before and after the inversion, and the water quality of the discharged water is not influenced by the inversion of the electrodialysis membrane stack 4.

In this embodiment, the controller 7 is connected to the first flow valve 601, the second flow valve 602, the third flow valve 603, the first solenoid valve 604, the second solenoid valve 605, the third solenoid valve 606, the fourth solenoid valve 607, and the four-way valve 608, respectively. The controller 7 controls the opening of the first flow valve 601, the second flow valve 602 and the third flow valve 603 according to the water making mode, controls the opening and closing of the first solenoid valve 604, the second solenoid valve 605, the third solenoid valve 606 and the fourth solenoid valve 607, and adjusts the communication state of each port inside the four-way valve 608, thereby achieving the purpose of switching the waterway of the water purifying system 100.

In one embodiment of the present invention, the water producing modes of the water purification system 100 may include a positive electricity water producing mode and a reverse electricity water producing mode.

In the embodiment of the present invention, the water outlet 5 is used for discharging purified water purified by the water purification system 100. The water outlet 5 may be provided with a water outlet button, and the controller 7 is further connected with the water outlet button, and is configured to receive an electrical signal sent by the water outlet button when the water outlet button is pressed, so as to confirm that the water purification system 100 enters the water making mode, and determine that the water purification system 100 enters the standby mode when the water outlet button is pressed again.

For better water purification, a pre-filter 9 may be provided on the water inlet side of the electrodialysis stack 4 and a post-filter 10 may be provided on the water outlet side of the electrodialysis stack, see fig. 1.

As a possible implementation manner, the pre-filter 9 can be arranged between the water pump 3 and the first flow valve 601, that is, at a position before raw water enters the electrodialysis membrane stack 4, so that the pre-filter 9 can ensure that large-particle impurities such as sediment, rust and the like generated in a raw water pipe network can not enter a subsequent pipeline, and the subsequent pipeline and equipment are prevented from being blocked or damaged, so that the subsequent pipeline and equipment are protected.

As a possible embodiment, the post-filter element 10 may be disposed between the first electromagnetic valve 604 and the water outlet 5, so as to further improve the purity of the outlet water. Wherein, the front filter element 9 can adopt an active carbon filter element for removing impurities and residual chlorine in raw water, and the rear filter element 10 can adopt a UV sterilization filter element for further sterilizing the purified water purified by the electrodialysis membrane stack 4.

In one embodiment of the present invention, referring to fig. 1, the water purification system 100 may further include a second detector 8 and a power supply 11.

The second detector 8 is used for detecting the total dissolved solids value of the water discharged from the water purification system 100 to obtain the TDS of the discharged water; wherein the controller 7 is further connected to a second detector 8 for adjusting the voltage applied to the electrodialysis stack 4 in dependence of the effluent TDS.

In this embodiment, referring to fig. 1, a second detector 8 may be disposed between the post-filter element 10 and the water outlet 5 to detect TDS of the water from the water purification system 100 to obtain the TDS of the outlet water. From the obtained TDS value of the effluent, it is possible to know how many milligrams of soluble solids are dissolved in the purified water per liter of electrodialysis membrane stack 4, and the water quality of the effluent from the water purification system 100. Wherein the second detector 8 may employ a TDS sensor.

The power supply 11 can be electrically connected with the electrodialysis membrane stack 4 for supplying power to the electrodialysis membrane stack; wherein the controller 7 is further connected to a power supply 11 for adjusting the polarity of the voltage applied by the power supply 11 to the electrodialysis membrane stack 4 according to the water production mode.

Specifically, as described above, the water generation mode of the water purification system 100 includes positive electricity generation and reverse electricity generation. The time of inversion can be determined according to the incoming water TDS detected by the second detector 2, and the incoming water TDS has different values and different times, wherein the incoming water TDS can have a negative correlation with the time of inversion. That is, the greater the TDS of the incoming water, the worse the water quality, the easier the electrodialysis membrane stack 4 is to accumulate dirt on the inner side of the electrodialysis membrane stack 4 when water is purified, and in order to prevent the electrodialysis membrane stack 4 from accumulating more dirt on one side to cause blockage and pressure bearing, the electrodialysis membrane stack 4 needs to perform pole inversion as soon as possible, so the pole inversion time is shorter. As one example, the relationship of the incoming water TDS to the reverse pole time may be as shown in table 1 below.

TABLE 1

When the water purification system 100 initially produces water, recording the water consumption time of the water purification system 100 in the current water production mode, comparing the water consumption time with the reverse polarity time, and when the water consumption time is less than or equal to the reverse polarity time, indicating that the accumulated dirt in the concentrated water chamber of the electrodialysis membrane stack 4 is insufficient to cause harm under the current water quality condition, so that the water production mode does not need to be switched, namely the reverse polarity is not needed, and the current water production mode is not changed; when the water use time is longer than the inversion time, it is indicated that the accumulated dirt in the concentrate chamber of the electrodialysis membrane stack 4 may cause the blockage or pressure bearing on one side of the electrodialysis membrane stack 4, so that the current water making mode needs to be changed by switching the water making mode, namely performing inversion.

It should be noted that, the current water making mode is not changed, that is, the current water making mode of the water purifying system 100 is positive electricity water making, the positive electricity water making is continued, and the current water making mode of the water purifying system 100 is reverse electricity water making, the reverse electricity water making is continued. Changing the current water making mode, i.e. the current water making mode of the water purifying system 100 is positive electricity water making, changes to reverse electricity water making, and the current water making mode of the water purifying system 100 is reverse electricity water making, changes to positive electricity water making. Wherein, the water making mode of the water purifying system 100 can be changed by changing the voltage polarity of the power supply 11. Traditional membrane separation processes are mainly pressure driven membrane processes, including microfiltration, ultrafiltration, nanofiltration and reverse osmosis, which generally have larger fluxes, but have lower rejection rates for small-molecule solutes; while nanofiltration and reverse osmosis have higher rejection rate on small-molecule solutes, but have the problems of higher energy consumption, serious membrane pollution and the like. Compared with the traditional pressure-driven membrane process, the positive and negative electrodes of the electrodialysis membrane stack 4 are changed by changing the voltage polarity of the power supply 11, so that pollutants on the membrane surface are desorbed, membrane pollution can be reduced, scale in the electrodialysis membrane stack 4 is conveniently removed, the working reliability and stability of the electrodialysis membrane stack 4 are improved, and the service life of the electrodialysis membrane stack 4 is prolonged.

In different water production modes, the positive and negative ion flows inside the electrodialysis membrane stack are different, and the water inlet shade corresponding to the first water chamber 401 and the second water chamber 402 is also different, so that the state of each valve of the waterway switching device 6 needs to be changed.

Specifically, in the case of positively producing water, the states of the valves of the waterway switching device 6 are: the third flow valve 603 is closed, the first flow valve 601 and the second flow valve 602 are opened, the first solenoid valve 604 and the second solenoid valve 605 are opened, the first end and the second end of the four-way valve 608 are communicated, the third end and the fourth end are communicated, and the third solenoid valve 606 and the fourth solenoid valve 607 are closed as shown in the following table 2. Meanwhile, the current applied to the electrodialysis membrane stack 4 by the power supply 11, and the pump water flow rate of the water pump 3 may be set according to the effluent TDS, as shown in table 2 below.

TABLE 2

That is, in the positive water making mode, the first water chamber 401 is a fresh water chamber, the second water chamber 402 is a concentrated water chamber, raw water in the raw water tank 101 enters from the water inlet end of the first water chamber 401 under the action of the water pump 3, the electrodialysis membrane stack 4 purifies the raw water, flows through the first end, the second end and the first electromagnetic valve 604 of the four-way valve 608 from the water outlet end of the first water chamber 401, and then flows out from the water outlet 5, and waste water in the second water chamber 402 flows into the waste water tank 102 from the fourth end, the third end and the second electromagnetic valve 605 of the four-way valve 608.

When water is produced by reverse electricity, the states of the valves of the waterway switching device 6 are as follows: the second flow valve 602 is closed, the first flow valve 601 and the third flow valve 603 are opened, the first solenoid valve 604 and the second solenoid valve 605 are opened, the first end of the four-way valve 608 is communicated with the third end, the second end is communicated with the fourth end, and the third solenoid valve 606 and the fourth solenoid valve 607 are closed as shown in the following table 3. Meanwhile, the current applied to the electrodialysis membrane stack 4 by the power supply 11, and the pump water flow rate of the water pump 3 may be set according to the effluent TDS, as shown in table 3 below.

TABLE 3 Table 3

That is, in the reverse electric water producing mode, the first water chamber 401 is a concentrate chamber, the second water chamber 402 is a fresh water chamber, raw water in the raw water tank 101 enters from the water inlet end of the second water chamber 402 under the action of the water pump 3, the electrodialysis membrane stack 4 purifies the raw water, flows through the fourth end, the second end and the first electromagnetic valve 604 of the four-way valve 608 from the water outlet end of the second water chamber 402, and then flows out from the water outlet 5, and waste water in the first water chamber 401 flows into the waste water tank 102 from the first end, the third end and the second electromagnetic valve 605 of the four-way valve 608.

As an example, the water outlet flow of the water pump 3 may be determined according to the water outlet TDS, that is, the corresponding relationship between the water outlet TDS and the water outlet flow of the water pump 3 may be established in advance, and further, the water outlet flow of the water pump 3 may be determined according to the water outlet TDS when water is produced.

The relationship among the water outlet flow rate V, the current I applied to the electrodialysis membrane stack 4, the water outlet TDS, the water inlet TDS, and the voltage vpump voltage of the water pump 3 may be:

；

。

when the water preparation control is performed, the V pump voltage can be obtained through calculation according to the formula, and then the corresponding voltage is applied to the water pump 3, so that the control of the water pump 3 according to the pump water flow can be realized; the water outlet TDS can be obtained through calculation according to the formula, and the water purifying effect can be determined according to the calculated water outlet TDS and the detected water outlet TDS.

In summary, in the water purification system 100 provided by the embodiment of the invention, the waterway switching device 6 is disposed between the water pump 3, the water tank 1, the electrodialysis membrane stack 4 and the water outlet 5, and the waterway and the water making mode of the water purification system 100 are switched in time according to the water inlet condition of the water purification system 100, so as to prolong the scaling time in the electrodialysis membrane stack 4, reduce the cleaning times of the electrodialysis membrane stack 4, and prolong the service life of the electrodialysis membrane stack 4.

Based on the water purification system 100 of the above embodiment, the present invention proposes a control method of the water purification system.

Fig. 3 is a flowchart of a control method of a water purification system according to an embodiment of the present invention, and as shown in fig. 3, the control method of the water purification system includes the following steps:

Step S11, obtaining inflow TDS, wherein the inflow TDS is a Total Dissolved Solids (TDS) value of inflow water of the water purification system.

Specifically, the TDS of the water flowing into the water purification system 100 may be collected by a TDS sensor, and the TDS of the water flowing into the water purification system may be obtained by acquiring data collected by the TDS sensor.

And S12, determining the pole inverting time according to the inflow TDS.

Specifically, in the operation process of the electrodialysis membrane stack 4, the polarities of the positive electrode and the negative electrode of the electrodialysis membrane stack 4 are inverted once every certain time, and the inverting time in the invention is the interval time for inverting the polarities of the positive electrode and the negative electrode of the electrodialysis membrane stack 4 once. Since TDS reflects the condition of water quality, the larger the value of TDS, i.e., the more soluble solids dissolved in each liter of water, the worse the water quality. Therefore, the greater the TDS of the incoming water, the worse the water quality, the more likely the electrodialysis membrane stack 4 is to accumulate dirt on the inner side of the electrodialysis membrane stack 4 in water purification, and in order to prevent the electrodialysis membrane stack 4 from accumulating more dirt on the side to cause blockage and pressure bearing, the electrodialysis membrane stack 4 needs to be reversed as soon as possible, so the time for reversing the poles is shorter.

Further specifically, determining the inversion time from the influent TDS may include: detecting that the TDS of the inlet water is smaller than a first preset value, and determining the reverse pole time as first time; detecting that the TDS of the inlet water is larger than or equal to a first preset value and smaller than a second preset value, and determining the reverse pole time as second time, wherein the second time is smaller than the first time; and detecting that the TDS of the inlet water is larger than or equal to a second preset value, and determining the time of inverting the pole as a third time, wherein the third time is smaller than the second time.

Wherein the first preset value can be 100-200 ppm, such as 150ppm; the second preset value can be 250-350 ppm, such as 300ppm; the first time may be 45-75 min, such as 60min; the second time may be 15 to 45 minutes, for example, 20 minutes; the third time may be 5 to 15 minutes, for example, 10 minutes.

And S13, determining a water mode according to the polarity reversing time.

Specifically, after the water purification system 100 adopts the positive electricity water making mode or the reverse electricity water making mode for a period of time, the concentration in the water chamber at one side of the electrodialysis membrane stack 4 becomes high due to the directional movement of ions, so that in order to prevent more dirt from accumulating, the water purification system 100 needs to change the water making mode after running for a certain time (the time of inverting the polarity) in a certain water making mode, namely, the directional movement of ions in the electrodialysis membrane stack 4 is changed, so that the positive and negative electrodes of the electrodialysis membrane stack 4 are changed to desorb pollutants on the membrane surface, thereby reducing membrane pollution, improving the working reliability and stability of the electrodialysis membrane stack 4, and prolonging the service life of the electrodialysis membrane stack 4.

Further specifically, determining the water pattern based on the polarity inversion time may include: recording water usage time of the water purification system 100 in a current water production mode when the water purification system 100 produces water; comparing the water use time with the pole inversion time. Namely judging the water consumption time and the polarity inverting time; when the water use time is less than or equal to the reverse pole time, the water making mode is not switched; and when the water using time is longer than the reverse time, switching the water making mode. It should be noted that, the current water making mode is not changed, that is, the current water making mode of the water purifying system 100 is positive electricity water making, the positive electricity water making is continued, and the current water making mode of the water purifying system 100 is reverse electricity water making, the reverse electricity water making is continued. Changing the current water making mode, i.e. the current water making mode of the water purifying system 100 is positive electricity water making, changes to reverse electricity water making, and the current water making mode of the water purifying system 100 is reverse electricity water making, changes to positive electricity water making.

Wherein, when the water use time is greater than the reverse pole time, switching the water making mode may include: the first flow valve 601, the second flow valve 602, the third flow valve 603, the first solenoid valve 604, the second solenoid valve 605, the third solenoid valve 606, the fourth solenoid valve 607, and the four-way valve 608 are controlled to be fully closed, and the water use time is cleared. The clear water use time is to calculate the time for which the water purification system 100 operates in the changed water making mode so as to change the water making mode next time.

And step S14, controlling the applied voltages of the water pump, the waterway switching device and the electrodialysis membrane stack according to the determined water making mode when the water purifying system is used for making water.

Specifically, referring to fig. 2, controlling the applied voltages of the water pump 3, the waterway switching device 6, and the electrodialysis membrane stack 4 according to the determined water making mode may include: the third flow valve 603 is controlled to be closed, the first flow valve 601 and the second flow valve are controlled to be opened 602, the first electromagnetic valve 604 and the second electromagnetic valve 605 are controlled to be opened, the first end and the second end of the four-way valve 608 are controlled to be communicated, the third end and the fourth end are controlled to be communicated, the third electromagnetic valve 606 and the fourth electromagnetic valve 607 are controlled to be closed, and the water pump 3 is controlled to be started. That is, in the positive water producing mode, when the first water chamber 401 of the electrodialysis membrane stack 4 is a fresh water chamber and the second water chamber 402 is a concentrate chamber, the first flow valve 601, the second flow valve 602, the first water chamber 401 of the electrodialysis membrane stack 4, the first end and the second end of the four-way valve 608, and the first solenoid valve 604 are connected to each other to form one fresh water channel. A concentrated water channel is formed among the second water chamber 402 of the electrodialysis membrane stack 4, the fourth end and the third end of the four-way valve 608 and the second electromagnetic valve 605.

Or, the second flow valve 602 is controlled to be closed, the first flow valve 601 and the third flow valve 603 are controlled to be opened, the first electromagnetic valve 604 and the second electromagnetic valve 605 are controlled to be opened, the first end of the four-way valve 608 is controlled to be communicated with the third end, the second end of the four-way valve 608 is controlled to be communicated with the fourth end, the third electromagnetic valve 606 and the fourth electromagnetic valve 607 are controlled to be closed, and the water pump 3 is controlled to be started. That is, in the reverse electric water producing mode, when the first water chamber 401 of the electrodialysis membrane stack 4 is a concentrate chamber and the second water chamber 402 is a fresh water chamber, the first flow valve 601, the third flow valve 603, the second water chamber 402 of the electrodialysis membrane stack 4, the fourth end and the second end of the four-way valve 608, and the first solenoid valve 604 are connected to each other to form one fresh water channel. A concentrated water channel is formed among the first water chamber 401 of the electrodialysis membrane stack 4, the first end of the four-way valve 608, the third end of the four-way valve and the second electromagnetic valve 605.

It can be seen that, whether in the positive electricity water making mode or the reverse electricity water making mode, the second end of the four-way valve 608 flows out pure water, the third end flows out concentrated water, and the concentrated water channel and the fresh water channel are not crossed, so that the quality of the pure water of the water purifying system 100 can be ensured.

In one embodiment of the present invention, the control method of the water purification system may further include: obtaining effluent TDS, and determining current applied to the electrodialysis membrane stack 4 and pump water flow of the water pump 3 according to the effluent TDS, wherein the effluent TDS is the total dissolved solid value of effluent of the water purification system 100; the power supply 11 of the electrodialysis membrane stack 4 is controlled according to the current and the water making mode, the water pump 3 is controlled according to the pump water flow rate, and the waterway switching device 6 is controlled to make water.

The TDS of the water discharged from the water purification system 100 may be collected by a TDS sensor, and the TDS of the water discharged may be obtained by acquiring data collected by the TDS sensor.

The following describes the working procedure of the water purification system according to an embodiment of the present invention with reference to fig. 1, 2 and 4:

in this embodiment, referring to fig. 4, when the water purification system produces water, i.e., a switch button at a water outlet is pressed, the influent TDS of the water purification system 100 is obtained, and the inverting time of the electrodialysis membrane stack 4 is determined according to the obtained influent TDS. If the water usage time of the water purification system 100 in the current water production mode is less than the reverse time, water production is continued in the current water production mode. If the current water making mode is positive electricity water making, the third flow valve 603 is controlled to be closed, the first flow valve 601 and the second flow valve 602 are controlled to be opened, the first electromagnetic valve 604 and the second electromagnetic valve 605 are controlled to be opened, the first end and the second end of the four-way valve 608 are communicated, the third end and the fourth end are communicated, after a certain period of time, such as 20 seconds, the water pump 3 is started, the corresponding flow rate power is set, and meanwhile, corresponding current A1 is applied to the electrodialysis membrane stack 4 according to the effluent TDS, so that the electrodialysis membrane stack 4 continuously produces water.

In the positive electricity water making process, the water consumption time is recorded in real time, the water consumption time is compared with the water consumption time according to the recorded water consumption time, whether the water consumption time is larger than the water consumption time or not is judged, if the water consumption time is smaller than or equal to the water consumption time, the water making mode of the water purifying system 100 is not switched, and the electrodialysis membrane stack 4 continues to make water in the current mode. If the water use time is longer than the inversion time, the water making mode of the water purification system 100 is switched to invert the electrodialysis membrane stack 4. Specifically, after all valves of the waterway switching device 6 are closed and the water use time is cleared, the water making mode is switched, and the positive water making mode is switched to the reverse water making mode. When water is produced by reverse electricity, the second flow valve 602 is controlled to be closed, the first flow valve 601 and the third flow valve 603 are controlled to be opened, the first electromagnetic valve 604 and the second electromagnetic valve 605 are controlled to be opened, the first end of the four-way valve 608 is communicated with the third end, the second end of the four-way valve 608 is communicated with the fourth end, the third electromagnetic valve 606 and the fourth electromagnetic valve 607 are controlled to be closed, the water pump 3 is started after a certain time such as 20 seconds, the corresponding flow rate power is set, and meanwhile, corresponding current A1 is applied to the electrodialysis membrane stack 4 according to the water outlet TDS, so that the electrodialysis membrane stack 4 continuously produces water.

Correspondingly, in the process of reverse electric water production, the water consumption time is also required to be recorded so as to be convenient for switching the water production mode next time. After the water purification system 100 finishes the reverse electricity water production, the third electromagnetic valve 606 and the fourth electromagnetic valve 607 are controlled to be opened, the first electromagnetic valve 604 and the second electromagnetic valve 605 are closed, the water pump 3 is closed, the power supply 11 is closed, and the water purification system 100 enters a standby mode. At the end of water production of the water purification system 100, the third electromagnetic valve 606 and the fourth electromagnetic valve 607 are opened so that the purified water in the purified water outlet waterway flows back to the original water tank 101.

To illustrate the effect of the water purification system 100 of the present invention on controlling the fouling conditions inside the electrodialysis membrane stack 4, a related experiment was performed. The implementation shows that under the condition that the water making mode is not switched, the electroosmosis membrane stack 4 starts to scale after 180 hours, and under the condition that the waterway and the water making mode of the water purifying system 100 are switched according to the water quality condition, the scaling time of the electroosmosis membrane stack 4 is prolonged to 700 hours, and the water making effect of the water purifying system is greatly improved.

According to the control method of the water purification system provided by the embodiment of the invention, the water path and the water making mode of the water purification system 100 are switched in time according to the water inlet condition of the water purification system 100, so that the scaling time in the electrodialysis membrane stack 4 is prolonged, the cleaning times of the electrodialysis membrane stack 4 are reduced, and the service life of the electrodialysis membrane stack 4 is prolonged.

The present invention provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements a control method of a water purification system as proposed by an embodiment of the second aspect of the present invention.

The invention provides an electronic device, which comprises a memory and a processor, wherein the memory is stored with a computer program, and when the computer program is executed by the processor, the control method of the water purifying system provided by the embodiment of the second aspect of the invention is realized.

The invention also provides water purifying equipment.

Fig. 5 is a schematic structural view of a water purifying apparatus according to an embodiment of the present invention. As shown in fig. 5, the water purifying apparatus 200 includes the water purifying system 100 according to the embodiment of the first aspect of the present invention, or the electronic apparatus according to the embodiment of the fourth aspect of the present invention.

According to the water purifying device 200 provided by the embodiment of the invention, through the water purifying system 100 or the electronic device, the waterway and the water making mode of the water purifying system 100 can be timely switched according to the water inlet condition of the water purifying system 100, so that the scaling time in the electrodialysis membrane stack 4 is prolonged, the cleaning times of the electrodialysis membrane stack 4 are reduced, and the service life of the electrodialysis membrane stack 4 is prolonged.

It should be noted that the logic and/or steps represented in the flowcharts or otherwise described herein, for example, may be considered as a ordered listing of executable instructions for implementing logical functions, and may be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). In addition, the computer readable medium may even be paper or other suitable medium on which the program is printed, as the program may be electronically captured, via, for instance, optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner, if necessary, and then stored in a computer memory.

It is to be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above-described embodiments, the various steps or methods may be implemented in software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, may be implemented using any one or combination of the following techniques, as is well known in the art: discrete logic circuits having logic gates for implementing logic functions on data signals, application specific integrated circuits having suitable combinational logic gates, programmable Gate Arrays (PGAs), field Programmable Gate Arrays (FPGAs), and the like.

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

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. A water purification system, the system comprising:

a water tank;

the first detector is used for detecting the total dissolved solid value of the inlet water of the water purification system to obtain inlet water TDS;

the water pump is connected to the waterway of the water purification system;

electrodialysis membrane stack and water outlet;

the waterway switching device is respectively connected with the water pump, the water tank, the electrodialysis membrane stack and the water outlet and is used for switching waterways of the water purifying system;

the controller is used for determining the reverse pole time according to the water inflow TDS, determining a water making mode according to the reverse pole time, and controlling the applied voltages of the water pump, the waterway switching device and the electrodialysis membrane stack according to the determined water making mode when the water purification system is used for making water;

wherein, the water tank includes former water tank and wastewater tank, electrodialysis membrane stack includes first hydroecium and second hydroecium, waterway switching device includes:

The first flow valve is connected with the water pump, the other end of the first flow valve is connected with one end of the second flow valve to form a first node, the other end of the second flow valve is connected with the water inlet end of the first water chamber, one end of the third flow valve is connected with the first node, and the other end of the third flow valve is connected with the water inlet end of the second water chamber;

one end of the first electromagnetic valve is connected with the water outlet, one end of the second electromagnetic valve is connected with the wastewater tank, one end of the third electromagnetic valve is connected with the other end of the first electromagnetic valve to form a second node, one end of the fourth electromagnetic valve is connected with the original water tank, the other end of the second electromagnetic valve is connected with the other end of the fourth electromagnetic valve to form a third node, the other end of the third electromagnetic valve is connected with the other end of the fourth electromagnetic valve to form a fourth node, and the fourth node is connected with the third node;

the first end of the four-way valve is connected with the water outlet end of the first water chamber of the electrodialysis membrane stack, the second end of the four-way valve is connected with the second node, the third end of the four-way valve is connected with the third node, and the fourth end of the four-way valve is connected with the water outlet end of the second water chamber of the electrodialysis membrane stack;

The controller is respectively connected with the first flow valve, the second flow valve, the third flow valve, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the four-way valve;

the power supply is connected with the electrodialysis membrane stack and is used for supplying power to the electrodialysis membrane stack;

wherein the controller is further configured to adjust a polarity of a voltage applied to the electrodialysis membrane stack by the power supply according to the water production mode;

the front filter element is arranged on the water inlet side of the electrodialysis membrane stack;

and the rear filter element is arranged on the water outlet side of the electrodialysis membrane stack.

2. The water purification system of claim 1, wherein the system comprises:

the second detector is used for detecting the total dissolved solid value of the water discharged by the water purification system to obtain the TDS of the discharged water;

wherein the controller is further configured to adjust a voltage applied to the electrodialysis stack based on the effluent TDS.

3. A control method of a water purification system according to any one of claims 1-2, characterized in that the method is used in a water purification system, said method comprising the steps of:

obtaining inflow TDS, wherein the inflow TDS is the total dissolved solid value of inflow water of the water purification system;

Determining the inverting time according to the inflow TDS;

determining a water pattern according to the polarity reversing time;

and when the water purification system prepares water, controlling the applied voltages of the water pump, the waterway switching device and the electrodialysis membrane stack according to the determined water preparation mode.

4. A control method of a water purification system according to claim 3, wherein the determining the reverse pole time from the inflow TDS comprises:

detecting that the water inflow TDS is smaller than a first preset value, and determining the polarity inverting time as first time;

detecting that the water inflow TDS is larger than or equal to the first preset value and smaller than a second preset value, and determining the polarity reversing time to be second time, wherein the second time is smaller than the first time;

and detecting that the water inflow TDS is larger than or equal to the second preset value, and determining the pole reversing time to be third time, wherein the third time is smaller than the second time.

5. The method of controlling a water purification system according to claim 4, wherein the determining a water pattern according to the reverse polarity time comprises:

when the water purification system produces water, recording the water consumption time of the water purification system in the current water production mode;

Comparing the water use time with the pole inversion time;

when the water consumption time is less than or equal to the pole reversing time, the water making mode is not switched;

when the water use time is longer than the pole inversion time, switching a water making mode;

wherein the water producing mode comprises positive electricity water producing and reverse electricity water producing.

6. The method according to claim 5, wherein the controlling the applied voltages of the water pump, the waterway switching device, and the electrodialysis membrane stack according to the determined water making mode includes:

the third flow valve is controlled to be closed, the first flow valve and the second flow valve are controlled to be opened, the first electromagnetic valve and the second electromagnetic valve are controlled to be opened, the first end and the second end of the four-way valve are controlled to be communicated, the third end and the fourth end of the four-way valve are controlled to be communicated, the third electromagnetic valve and the fourth electromagnetic valve are controlled to be closed, and the water pump is controlled to be started; or alternatively, the first and second heat exchangers may be,

and controlling the second flow valve to be closed, controlling the first flow valve and the third flow valve to be opened, controlling the first electromagnetic valve and the second electromagnetic valve to be opened, controlling the first end of the four-way valve to be communicated with the third end, controlling the second end to be communicated with the fourth end, controlling the third electromagnetic valve and the fourth electromagnetic valve to be closed, and controlling the water pump to be started.

7. The method of controlling a water purification system according to claim 6, further comprising:

obtaining effluent TDS, and determining current applied to the electrodialysis membrane stack and pump water flow of the water pump according to the effluent TDS, wherein the effluent TDS is a total dissolved solid value of effluent of the water purification system;

and controlling the power supply of the electrodialysis membrane stack according to the current and the water making mode, controlling the water pump according to the water flow of the pump, and controlling the waterway switching device to make water.

8. The method of controlling a water purification system according to claim 5, wherein switching the water generation mode when the water use time is greater than the reverse pole time comprises:

and controlling the first flow valve, the second flow valve, the third flow valve, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve, the fourth electromagnetic valve and the four-way valve to be fully closed, and resetting the water consumption time.

9. A computer-readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements a control method of a water purification system as claimed in any one of claims 3-8.

10. An electronic device comprising a memory, a processor, the memory having stored thereon a computer program, wherein the computer program, when executed by the processor, implements a method of controlling a water purification system as claimed in any one of claims 3-8.

11. A water purification apparatus comprising a water purification system as claimed in any one of claims 1-2, or an electronic apparatus as claimed in claim 10.