CN111470590A - Water purifier, water purification control method and water purifier - Google Patents

Water purifier, water purification control method and water purifier Download PDF

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Publication number
CN111470590A
CN111470590A CN202010466392.6A CN202010466392A CN111470590A CN 111470590 A CN111470590 A CN 111470590A CN 202010466392 A CN202010466392 A CN 202010466392A CN 111470590 A CN111470590 A CN 111470590A
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water
tds detection
tds
control module
electronic control
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孟繁轲
马依文
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Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
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Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
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Priority to CN202010466392.6A priority Critical patent/CN111470590A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/008Control or steering systems not provided for elsewhere in subclass C02F
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/46Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • C02F1/4693Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
    • C02F1/4695Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis electrodeionisation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/10Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Organic Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Engineering & Computer Science (AREA)
  • Hydrology & Water Resources (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Molecular Biology (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)

Abstract

The invention relates to the technical field of water purification, and discloses a water purification device, a water purification control method and a water purifier. The water purifying device comprises an electrodialysis unit, a raw water inlet end, a concentrated water outlet end, a purified water outlet end and a TDS detection unit, wherein the electrodialysis unit can reverse poles and comprises a first water inlet end, a first water outlet end and a second water outlet end; the raw water inlet end is communicated with the first water inlet end, the concentrated water outlet end can be communicated with one of the first water outlet end and the second water outlet end, and the purified water outlet end can be communicated with the other of the first water outlet end and the second water outlet end so as to switch water paths; the TDS detection unit is used for detecting the water passing through the electrodialysis unit; the electrode reversing and water path switching of the electrodialysis unit are performed according to the detection value of the TDS detection unit. The water purifying device can accurately monitor the internal change condition of the electrodialysis unit, effectively avoid excessive water scale from being collected on the electrodes and the ion exchange membranes to damage the electrodialysis unit, and ensure the service life and the water purifying efficiency of the electrodialysis unit.

Description

Water purifier, water purification control method and water purifier
Technical Field
The invention relates to the technical field of water purification, in particular to a water purification device, a water purification control method and a water purifier.
Background
Electrodialysers are generally composed of main components such as water distribution plates, ion exchange membranes, electrodes, clamping devices, etc., for example, water distribution plates, anion exchange membranes (negative membranes) and cation exchange membranes (positive membranes) are alternately arranged in sequence between the anode and the cathode to form a multi-layered compartment. Under the action of an external electric field between the anode and the cathode, anions and cations in the aqueous solution entering the compartment can directionally migrate towards the anode and the cathode respectively, and because the anode membrane only allows cations to pass and prevents anions from passing, and the cathode membrane only allows anions to pass and prevents cations from passing (namely if the fixed charge on the ion exchange membrane is opposite to the charge of the ions, the ions can pass, and if the charges of the ions are the same, the ions are repelled), the anions and the cations in the dilute chamber migrate to the adjacent concentrated chamber, so that the salt-containing water is diluted. In the electrodialyzer, the compartment in which the ions in water are enriched is called the concentrated water chamber, and the compartment in which the ions in water are eliminated by electromigration is called the fresh water chamber.
The electrodialyzer can remove various ions in water and effectively reduce the TDS of the water. However, as the electrodialysis proceeds, ions in the concentrate compartment accumulate to form precipitated scale. In order to reduce the decrease in electrodialysis efficiency caused by the accumulation of scale on the ion exchange membranes and electrode plates, it is common in the prior art to periodically (i.e., after a certain period of time) replace the cathode and anode to form alternating concentrate and dilute chambers.
Disclosure of Invention
The invention aims to provide a water purifying device which can accurately monitor the internal change condition of an electrodialysis unit, effectively avoid excessive scale accumulation on electrodes and an ion exchange membrane to damage the electrodialysis unit, improve the protection effect on the electrodes and the ion exchange membrane, and ensure the service life of the electrodialysis unit and the water purifying efficiency.
Therefore, the invention provides a water purifying device which comprises an electrodialysis unit capable of inverting poles, a raw water inlet end, a concentrated water outlet end, a purified water outlet end and a TDS detection unit, wherein the electrodialysis unit comprises a first water inlet end, a first water outlet end and a second water outlet end; the raw water inlet end is communicated with the first water inlet end, the concentrated water outlet end can be communicated with one of the first water outlet end and the second water outlet end, and the purified water outlet end can be communicated with the other of the first water outlet end and the second water outlet end so as to perform waterway switching; the TDS detection unit is used for detecting water passing through the electrodialysis unit; the electrode reversing and water path switching of the electrodialysis unit are performed according to the detection value of the TDS detection unit.
In the technical scheme, because TDS detecting element is used for detecting the water through the electrodialysis unit, like this, can accurately obtain the TDS (total dissolved solids)'s of play water content change in real time, and this kind of content change then can real-time reaction electrodialysis unit in the scale deposit condition of ion exchange membrane and electrode board, thereby can control the water route switching when the utmost point and the utmost point of the fall of electrodialysis unit are changed according to the content change of the TDS (total dissolved solids) of play water, like this, this purifier can accurately monitor the inside change condition of electrodialysis unit, effectively avoid gathering excessive incrustation scale on electrode and the ion exchange membrane in order to damage the electrodialysis unit, promote the guard action to electrode and ion exchange membrane, ensure electrodialysis unit's life and water purification efficiency.
Furthermore, the raw water inlet end can be communicated with the first water inlet end through a raw water inlet control valve, the concentrated water outlet end can be communicated with one of the first water outlet end and the second water outlet end through a concentrated water outlet control valve, and the purified water outlet end can be communicated with the other of the first water outlet end and the second water outlet end through a purified water outlet control valve.
Still further, the water purification device comprises an electronic control module which can control the electrode reversing of the electrodialysis unit and the water path switching according to the detection value of the TDS detection unit.
Furthermore, the TDS detection unit can provide a plurality of different detection modes at the same time, and the electronic control module can receive the plurality of different detection modes at the same time, and when any one detection mode reaches a set value first, the electronic control module controls the electrode reversing of the electrodialysis unit and controls the water path switching.
Further, the TDS detection unit comprises a purified water TDS detection unit, wherein the electronic control module can receive a purified water TDS detection value of the purified water TDS detection unit and can control the electrodialysis unit to reverse polarity and control the waterway switching when the purified water TDS detection value is equal to or greater than a purified water TDS set value.
Further, the TDS detection unit comprises a purified water TDS detection unit and a concentrated effluent TDS detection unit; the electronic control module can receive the water purification TDS detected value of water purification TDS detecting element with the dense effluent TDS detected value of dense effluent TDS detecting element, wherein, situation one: the electronic control module can calculate the ratio of the pure water TDS detection value to the concentrated effluent TDS detection value, and when the ratio is greater than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet and the TDS detection value of the purified water, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrodialysis unit to reverse poles and control the waterway switching.
Further, the TDS detection unit comprises a purified water TDS detection unit and a raw water inlet TDS detection unit; the electronic control module can receive the water purification TDS detected value of water purification TDS detecting element and the raw water TDS detected value of raw water TDS detecting element that intakes, wherein, situation one: the electronic control module can calculate the ratio of the purified water TDS detection value to the raw water inlet TDS detection value, and when the ratio is larger than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the raw water inlet TDS detection value to the purified water TDS detection value, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrodialysis unit to invert the electrodes and control the waterway to be switched.
Further, the water purifying device comprises a concentrated water inlet end, and the electrodialysis unit comprises a second water inlet end; the raw water inlet end can be communicated with one of the first water inlet end and the second water inlet end through the raw water inlet control valve, and the concentrated water inlet end can be communicated with the other of the first water inlet end and the second water inlet end through the concentrated water inlet control valve so as to perform waterway switching; the TDS detection unit comprises a concentrated water inlet TDS detection unit and a concentrated water outlet TDS detection unit; the electronic control module can receive the concentrated water inlet TDS detection value of the concentrated water inlet TDS detection unit and the concentrated water outlet TDS detection value of the concentrated water outlet TDS detection unit, wherein, situation one: the electronic control module can calculate the ratio of the TDS detection value of the inlet concentrated water to the TDS detection value of the outlet concentrated water, and when the ratio is larger than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet water to the TDS detection value of the concentrated water inlet water, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrodialysis unit to reverse the electrodes and control the waterway switching.
Furthermore, the raw water inlet control valve and the concentrated water inlet control valve as well as the concentrated water outlet control valve and the purified water outlet control valve are three-way valves respectively; the first water inlet end is provided with a first three-way joint, the second water inlet end is provided with a second three-way joint, the first water outlet end is provided with a third three-way joint, and the second water outlet end is provided with a fourth three-way joint; one water outlet of each of the raw water inlet control valve and the concentrated water inlet control valve is respectively connected with two water inlets of the first three-way joint, and the other water outlet of each of the raw water inlet control valve and the concentrated water inlet control valve is respectively connected with two water inlets of the second three-way joint; and one water inlet of each of the concentrated water outlet control valve and the purified water outlet control valve is respectively connected with two water outlets of the third three-way joint, and the other water inlet of each of the concentrated water outlet control valve and the purified water outlet control valve is respectively connected with two water outlets of the fourth three-way joint.
In addition, the present invention provides a water purifier including the water purifying apparatus as described above.
In addition, the present invention provides a purified water control method for controlling an electrodialysis unit to perform polarity inversion and water path switching according to a change in the content of total dissolved solids in water passing through the electrodialysis unit.
In the technical scheme, because can adopt TDS detecting element to detect the water through the electrodialysis unit, like this, can accurately obtain the TDS (total dissolved solids)'s of play water content change in real time, and this kind of content change then can real-time reaction electrodialysis unit in the scale deposit condition of ion exchange membrane and electrode board, thereby can control the water route switching when the pole of the utmost point of the reversal of electrodialysis unit and the pole of reversal according to the TDS (total dissolved solids)'s of play water content change, like this, this purifier can accurately monitor the inside change condition of electrodialysis unit, effectively avoid gathering excessive incrustation scale on electrode and the ion exchange membrane in order to damage the electrodialysis unit, promote the guard action to electrode and ion exchange membrane, ensure electrodialysis unit's life and water purification efficiency.
Further, the electrodialysis unit is controlled to perform electrode pouring and water path switching according to the content change of the total dissolved solids through an electric control module.
Further, the electronic control module receives a plurality of different detection modes for detecting the content change of the total dissolved solids at the same time, and when any one detection mode reaches a set value firstly, the electronic control module controls the electrode reversing of the electrodialysis unit and controls the water path switching.
Further, the electronic control module can receive a purified water TDS detection value and can control the electrodialysis unit to reverse polarity and control the waterway switching when the purified water TDS detection value is equal to or greater than a purified water TDS set value.
Further, the electronic control module can receive the water purification TDS detected value and the dense effluent TDS detected value, wherein, situation one: the electronic control module can calculate the ratio of the pure water TDS detection value to the concentrated effluent TDS detection value, and when the ratio is greater than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet and the TDS detection value of the purified water, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrodialysis unit to reverse poles and control the waterway switching.
Further, the electronic control module can receive the water purification TDS detected value and the raw water TDS detected value of intaking, wherein, situation one: the electronic control module can calculate the ratio of the purified water TDS detection value to the raw water inlet TDS detection value, and when the ratio is larger than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the raw water inlet TDS detection value to the purified water TDS detection value, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrodialysis unit to invert the electrodes and control the waterway to be switched.
Further, the electronic control module can receive the dense water TDS detected value and the dense water TDS detected value, wherein, situation one: the electronic control module can calculate the ratio of the TDS detection value of the inlet concentrated water to the TDS detection value of the outlet concentrated water, and when the ratio is larger than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet water to the TDS detection value of the concentrated water inlet water, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrodialysis unit to reverse the electrodes and control the waterway switching.
Further, the present invention provides a water purifier capable of implementing the water purification control method as described above.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic view of a water purifying apparatus according to an embodiment of the present invention.
Description of the reference numerals
1-electrodialysis unit, 2-raw water inlet end, 3-concentrated water outlet end, 4-purified water outlet end, 5-first water inlet end, 6-first water outlet end, 7-second water outlet end, 8-raw water inlet control valve, 9-concentrated water outlet control valve, 10-purified water outlet control valve, 11-electronic control module, 12-purified water TDS detection unit, 13-concentrated water outlet TDS detection unit, 14-raw water inlet TDS detection unit, 15-concentrated water inlet end, 16-second water inlet end, 17-concentrated water inlet control valve, 18-concentrated water inlet TDS detection unit, 19-second three-way joint, 20-first three-way joint, 21-third three-way joint, 22-fourth three-way joint.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
Referring to fig. 1, the water purifying device provided by the invention comprises an electrodialysis unit 1 capable of inverting polarity, a raw water inlet end 2, a concentrated water outlet end 3, a purified water outlet end 4 and a TDS detection unit, wherein the electrodialysis unit 1 comprises a first water inlet end 5, a first water outlet end 6 and a second water outlet end 7; the raw water inlet end 2 is communicated with the first water inlet end 5, the concentrated water outlet end 3 can be communicated with one of the first water outlet end 6 and the second water outlet end 7, and the purified water outlet end 4 can be communicated with the other of the first water outlet end 6 and the second water outlet end 7 so as to switch water paths; for example, before the water path is switched, the concentrated water outlet end 3 is communicated with the first water outlet end 6, the purified water outlet end 4 is communicated with the second water outlet end 7, after the electrodialysis unit 1 is reversed and the water path is switched, the concentrated water outlet end 3 is communicated with the second water outlet end 7, the purified water outlet end 4 is communicated with the first water outlet end 6, and the TDS detection unit is used for detecting water passing through the electrodialysis unit 1, for example, the TDS detection unit is used for detecting purified water, concentrated water outlet, raw water inlet or concentrated water inlet of the electrodialysis unit 1; and the switching of the polarity reversing and water path of the electrodialysis unit 1 is performed based on the detection value of the TDS detection unit.
In the technical scheme, because TDS detecting element is used for detecting the water through the electrodialysis unit, like this, can accurately obtain the TDS (total dissolved solids)'s of play water content change in real time, and this kind of content change then can real-time reaction electrodialysis unit in the scale deposit condition of ion exchange membrane and electrode board, thereby can control the water route switching when the utmost point and the utmost point of the fall of electrodialysis unit are changed according to the content change of the TDS (total dissolved solids) of play water, like this, this purifier can accurately monitor the inside change condition of electrodialysis unit, effectively avoid gathering excessive incrustation scale on electrode and the ion exchange membrane in order to damage the electrodialysis unit, promote the guard action to electrode and ion exchange membrane, ensure electrodialysis unit's life and water purification efficiency.
The TDS detection unit for detecting water passing through the electrodialysis unit 1 may have various detection means, which will be described in detail below.
In addition, in the water purifying device, the raw water inlet end 2 can be communicated with the first water inlet end 5 through a connecting pipe, the concentrated water outlet end 3 can be communicated with one of the first water outlet end 6 and the second water outlet end 7 through a connecting pipe, and the purified water outlet end 4 can be communicated with the other of the first water outlet end 6 and the second water outlet end 7 through a connecting pipe. When the electrodialysis unit 1 reverses the polarity and switches the water paths, the user can manually detach the connection pipe and then connect the connection pipe to the desired water outlet end again.
Alternatively, in an alternative embodiment, the water purification device may be connected to the water circuit by a control valve. For example, the raw water inlet end 2 can be communicated with the first water inlet end 5 through the raw water inlet control valve 8, the concentrated water outlet end 3 can be communicated with one of the first water outlet end 6 and the second water outlet end 7 through the concentrated water outlet control valve 9, and the purified water outlet end 4 can be communicated with the other of the first water outlet end 6 and the second water outlet end 7 through the purified water outlet control valve 10. Therefore, when the waterway is switched, the waterway can be conveniently switched only by operating the corresponding control valve.
However, the raw water inlet control valve 8, the concentrated water outlet control valve 9, and the purified water outlet control valve 10 are not limited to the valves shown in fig. 1. For example, in one embodiment of the control valves, the raw water inlet control valve 8, the concentrated water outlet control valve 9 and the purified water outlet control valve 10 may be two-way valves, in which case the purified water outlet 4 may be connected in parallel with two purified water outlet control valves 10, one purified water outlet control valve 10 being connected to the first water outlet 6 and the other purified water outlet control valve 10 being connected to the second water outlet 7, and likewise, the concentrated water outlet 3 may be connected in parallel with two concentrated water outlet control valves 9, one concentrated water outlet control valve 9 being connected to the first water outlet 6 and the other concentrated water outlet control valve 9 being connected to the second water outlet 7. In this way, by manipulating each of the thick water outflow control valves 9 and the pure water outflow control valves 10, the waterway can be switched. Alternatively, in another embodiment of the control valve, the raw water inlet control valve 8, the concentrated water outlet control valve 9, and the purified water outlet control valve 10 may be three-way valves (which will be described in detail below).
In addition, in the water purification apparatus, the user can manually control the polarity reversing and water path switching of the electrodialysis unit 1 based on the detection value of the TDS detection unit. Alternatively, in other embodiments of the water purification apparatus, referring to fig. 1, the water purification apparatus includes an electronic control module 11, and the electronic control module 11 can control the polarity reversing of the electrodialysis unit 1 and control the water path switching according to the detection value of the TDS detection unit. That is, the electronic control module 11 may automatically control the inverting pole of the electrodialysis unit 1 and the actions of the concentrated water outlet control valve 9 and the purified water outlet control valve 10 to switch the water path corresponding to the inverting pole according to the detection value of the TDS detection unit.
In addition, in the water purifying apparatus, the TDS detecting unit may detect the water passing through the electrodialysis unit 1 only by one detection method, for example, the TDS detecting unit detects only the purified effluent, or the concentrated effluent, or the purified effluent and the concentrated effluent, and then the electronic control module 11 calculates a ratio of the detected values of the purified effluent and the concentrated effluent, or detects the raw water (water to be purified) and the purified water, and then the electronic control module 11 calculates a ratio of the detected values of the raw water and the purified water, and so on, thereby controlling the polarity reversal of the electrodialysis unit 1 and controlling the water path switching. Several detection means will be described in detail below.
Alternatively, in other embodiments of the water purification apparatus, the TDS detection unit can provide a plurality of different detection modes at the same time, for example, the TDS of the TDS detection unit detecting the purified effluent and the TDS of the TDS detection unit detecting the concentrated effluent are performed at the same time, and the electronic control module 11 can receive a plurality of different detection modes at the same time, and in the plurality of different detection modes, when any one of the detection modes first reaches the set value, the electronic control module 11 controls the polarity reversing of the electrodialysis unit 1 and controls the water path switching. For example, the TDS of the purified water effluent detected by the TDS detecting unit and the TDS of the concentrated water effluent detected by the TDS detecting unit are performed simultaneously, and since the TDS value of the purified water will be increased and decreased after the purification capability of the electrodialysis unit 11 is decreased, the electrical control module 11 can control the electrodialysis unit 1 to perform polarity inversion and control water path switching when the TDS value of the concentrated water is first decreased to be less than or equal to a preset value. Therefore, through various detection modes, after one detection mode is failed or the detection sensitivity is reduced, other detection modes can also reflect the scaling situation of the electrodialysis unit 1 in real time, so that scaling in the electrodialysis unit 1 can be monitored in real time more reliably, the phenomenon that the electrodialysis unit 1 cannot be reversed in time due to serious scaling is avoided, and a water path is switched correspondingly.
Several detection modes of the TDS detection unit will be described in detail below.
The first detection mode, referring to fig. 1, the TDS detection unit includes a purified water TDS detection unit 12, wherein the electronic control module 11 can receive the purified water TDS detection value of the purified water TDS detection unit 12, and can control the electrodialysis unit 1 to invert and control the water path switching when the purified water TDS detection value is equal to or greater than the purified water TDS setting value. That is, the electrical control module 11 has a preset TDS setting value, the electrical control module 11 receives and compares the TDS detection value of the purified water detected in real time, and after the purification capacity of the electrodialysis unit 1 is decreased, the TDS of the purified water is increased, so that when the TDS detection value of the purified water is equal to or greater than the TDS setting value of the purified water, the electrical control module 11 controls the electrodialysis unit 1 to reverse polarity (i.e. to switch the polarity of the positive and negative electrodes) and correspondingly controls the water path switching (i.e. to control the corresponding control valve to switch the water path).
The second kind of detection mode, refer to fig. 1, TDS detecting element includes pure water TDS detecting element 12 and dense effluent TDS detecting element 13, wherein, automatically controlled module 11 can receive the pure water TDS detected value of pure water TDS detecting element 12 and the dense effluent TDS detected value of dense effluent TDS detecting element 13, because electrodialysis unit 1's purification ability descends the back, TDS in the pure water will increase, TDS in the dense effluent will descend, consequently, wherein, situation one: the electric control module can calculate the ratio of the pure water TDS detection value to the concentrated effluent TDS detection value, and when the ratio is greater than or equal to a set value, the electric control module 11 can control electrode reversing of the electrodialysis unit 1 and control waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet and the TDS detection value of the purified water, and when the ratio is smaller than or equal to a set value, the electronic control module 11 can control the electrodialysis unit 1 to reverse poles and control the waterway switching.
A third detection mode, referring to fig. 1, the TDS detection unit includes a concentrated effluent TDS detection unit 13, wherein the electronic control module 11 can receive the concentrated effluent TDS detection value of the concentrated effluent TDS detection unit 13, and since the purification capacity of the electrodialysis unit 1 is reduced, the TDS of the concentrated effluent will be reduced, and therefore, when the concentrated effluent TDS detection value is less than or equal to the set value of the concentrated effluent TDS, the electronic control module 11 will control the electrodialysis unit 1 to reverse polarity (i.e. to switch the polarity of the positive and negative electrodes) and correspondingly control the water path switching (i.e. to control the corresponding control valve to switch the water path).
A fourth detection mode, referring to fig. 1, the TDS detection unit includes a purified water TDS detection unit 12 and a raw water inlet TDS detection unit 14; the electronic control module 11 can receive the water purification TDS detection value of the water purification TDS detection unit 12 and the raw water inlet TDS detection value of the raw water inlet TDS detection unit 14, because the purification capacity of the electrodialysis unit 1 is reduced, the TDS in the water purification will be increased, and therefore, the first situation: the electronic control module 11 can calculate the ratio of the pure water TDS detection value to the raw water inlet TDS detection value, and when the ratio is larger than or equal to a set value, the electronic control module 11 can control electrode reversing of the electrodialysis unit 1 and control waterway switching; alternatively, case two: the electronic control module 11 can calculate the ratio of raw water intake TDS detected value and water purification TDS detected value, and when the ratio is less than or equal to the set value, the electronic control module 11 can control the electrodialysis unit 1 to reverse polarity and control the water path switching. Thus, through the TDS detection value of the raw water inlet water, the TDS content in the water outlet water can be more accurately changed, so that the electrode reversing of the electrodialysis unit 1 can be more accurately controlled, and the water path switching can be more accurately controlled.
In addition, in the water purification apparatus, water to be purified may be introduced into the concentrated water chamber of the electrodialysis unit 1, for example, the number of the first water inlet ends 5 may be multiple (for example, one first water inlet end 5 of the two first water inlet ends 5 may be communicated with the concentrated water chamber of the electrodialysis unit 1, and the other first water inlet end 5 may be communicated with the fresh water chamber of the electrodialysis unit 1), or concentrated water may be introduced into the concentrated water chamber of the electrodialysis unit 1, for example, as shown in fig. 1, the water purification apparatus includes a concentrated water inlet end 15, and the electrodialysis unit 1 includes a second water inlet end 16; the raw water inlet end 2 can be communicated with one of the first and second water inlet ends 5 and 16 through the raw water inlet control valve 8, the concentrated water inlet end 15 can be communicated with the other of the first and second water inlet ends 5 and 16 through the concentrated water inlet control valve 17 for waterway switching, for example, before pole reversal, the raw water inlet end 2 is communicated with the first water inlet end 5 through the raw water inlet control valve 8, the concentrated water inlet end 15 is communicated with the second water inlet end 16 through the concentrated water inlet control valve 17, and after pole reversal, the raw water inlet end 2 is communicated with the second water inlet end 16 through the raw water inlet control valve 8, and the concentrated water inlet end 15 is communicated with the first water inlet end 5 through the concentrated water inlet control valve 17; at this time, in the fifth detection mode, the TDS detection unit includes a concentrated water inlet TDS detection unit 18 and a concentrated water outlet TDS detection unit 13; at this time, the electronic control module 11 can receive the concentrated water inlet TDS detection value of the concentrated water inlet TDS detection unit 18 and the concentrated water outlet TDS detection value of the concentrated water outlet TDS detection unit 13, since after the purification capability of the electrodialysis unit 1 is reduced, the TDS in the concentrated water outlet will be reduced, and thus, the first case: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water inlet water to the TDS detection value of the concentrated water outlet water, and when the ratio is larger than or equal to a set value, the electronic control module 11 can control electrode reversing of the electrodialysis unit 1 and control waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet and the TDS detection value of the concentrated water inlet, and when the ratio is smaller than or equal to a set value, the electronic control module 11 can control the electrode reversing and the water path switching of the electrodialysis unit 1.
Of course, the above five detection methods may be performed separately or simultaneously.
Of course, although the name refers to concentrate inlet water, it should be understood that the concentrate inlet end 15 may also allow tap water to enter. In addition, in the electrodialysis unit 1, in one mode, the raw water inlet end 2 can enter raw water, the concentrated water inlet end 15 can enter concentrated water, the concentrated water outlet end 3 can discharge concentrated water, and the purified water outlet end 4 can discharge purified water. However, in another mode, the raw water inlet end 2 can be exchanged integrally, that is, the raw water inlet end 15 can be used for allowing raw water such as tap water to enter, the concentrated water outlet end 3 can be used for discharging purified water, and the purified water outlet end 4 can be used for discharging concentrated water.
Of course, the concentrate outlet of the concentrate outlet 3 can be stored in a concentrate storage, and can be fed into the electrodialysis unit 1 via the concentrate inlet 15, if necessary. Alternatively, the concentrate outlet end 3 and the concentrate inlet end 15 are connected to supply the required concentrate into the electrodialysis unit 1, and the concentrate that does not meet the requirement can be discharged.
In addition, in an embodiment of the control valve, the raw water inlet control valve 8 and the concentrated water inlet control valve 17 may be two-way valves, in which case the raw water inlet end 2 may be connected in parallel with two raw water inlet control valves 8, one raw water inlet control valve 8 is connected to the first inlet end 5 and the other raw water inlet control valve 8 is connected to the second inlet end 16, and similarly, the concentrated water inlet end 15 may be connected in parallel with two concentrated water inlet control valves 17, one concentrated water inlet control valve 17 is connected to the first inlet end 5 and the other concentrated water inlet control valve 17 is connected to the second inlet end 16. In this way, by operating the raw water inlet control valves 8 and the concentrated water inlet control valves 17, the waterway switching between the raw water inlet and the concentrated water inlet can be realized.
Alternatively, in an alternative embodiment, the raw water inlet control valve 8 and the concentrated water inlet control valve 17, and the concentrated water outlet control valve 9 and the purified water outlet control valve 10 are three-way valves, respectively; as shown in fig. 1, the first water inlet end 5 is provided with a first three-way joint 20, the second water inlet end 16 is provided with a second three-way joint 19, the first water outlet end 6 is provided with a third three-way joint 21, and the second water outlet end 7 is provided with a fourth three-way joint 22; one water outlet of each of the raw water inlet control valve 8 and the concentrated water inlet control valve 17 is connected with two water inlets of the first three-way joint 20, and the other water outlet of each of the raw water inlet control valve 8 and the concentrated water inlet control valve 17 is connected with two water inlets of the second three-way joint 19; one water inlet of each of the concentrated water outlet control valve 9 and the purified water outlet control valve 10 is connected to two water outlets of the third three-way joint 21, and the other water inlet of each of the concentrated water outlet control valve 9 and the purified water outlet control valve 10 is connected to two water outlets of the fourth three-way joint 22. Like this, through the three-way valve, can simplify the tube coupling of control valve for electric control module 11 only needs the route of control three-way valve can realize the water route and switch.
Further, the present invention provides a water purifier including the water purifying apparatus as described above. As described above, the water purifying efficiency and the overall quality of the water purifier are effectively improved by the water purifying device.
Further, the present invention provides a water purification control method in which the electrodialysis unit is controlled to perform the polarity inversion and the water path switching according to the content variation of the total dissolved solids in the water passing through the electrodialysis unit. Because can adopt TDS detecting element to detect the water through the electrodialysis unit, like this, can accurately obtain the TDS (total dissolved solids)'s of play water content change in real time, and this kind of content change then can real-time reaction electrodialysis unit in the scale deposit condition of ion exchange membrane and electrode board, thereby can control the water route switching when the utmost point and the utmost point of falling of electrodialysis unit according to the TDS (total dissolved solids)'s of play water content change, like this, this purifier can accurately monitor the inside change condition of electrodialysis unit, effectively avoid gathering excessive incrustation scale on electrode and the ion exchange membrane in order to damage the electrodialysis unit, promote the guard action to electrode and ion exchange membrane, ensure electrodialysis unit's life and water purification efficiency.
In addition, in the water purification control method, a user can manually control the switching of the polarity reversing and the water path of the electrodialysis unit according to the detection value of the TDS detection unit. Alternatively, in other embodiments, the electrodialysis unit is controlled by the electronic control module to perform the polarity inversion and water circuit switching according to the content change of the total dissolved solids. That is, the electronic control module can automatically control the polarity reversing of the electrodialysis unit and control the actions of the concentrated water outlet control valve and the purified water outlet control valve according to the detection value of the TDS detection unit so as to switch the water path corresponding to the polarity reversing.
In addition, in the purified water control method, the TDS detecting unit may detect the water passing through the electrodialysis unit only by one detection method, for example, the TDS detecting unit detects only the purified water outlet, or detects the concentrated water outlet, or detects the purified water outlet and the concentrated water outlet, and then the electronic control module calculates a ratio of the detected values of the purified water outlet and the concentrated water outlet, or detects the raw water (water to be purified) and the purified water, and then the electronic control module calculates a ratio of the detected values of the raw water and the purified water, and so on, thereby controlling the polarity reversal of the electrodialysis unit and controlling the water path switching. Several detection means will be described in detail below.
Or, in other embodiments of the water purification control method, the electronic control module receives a plurality of different detection modes for detecting the content change of the total dissolved solids at the same time, and when any one of the detection modes reaches a set value first, the electronic control module controls the electrode reversing of the electrodialysis unit and controls the water path switching. For example, the TDS of the purified water effluent detected by the TDS detecting unit and the TDS of the concentrated water effluent detected by the TDS detecting unit are performed simultaneously, and since the TDS value of the purified water will decrease and increase after the purification capacity of the electrodialysis unit decreases, for example, when the TDS value of the concentrated water first decreases to be less than or equal to the preset value, the electronic control module can control the electrodialysis unit to perform polarity reversal and control the water path switching. Therefore, through various detection modes, after one detection mode breaks down or the detection sensitivity is reduced, other detection modes can also reflect the scaling situation of the electrodialysis unit in real time, so that scaling in the electrodialysis unit can be monitored in real time more reliably, the phenomenon that the electrodialysis unit cannot be reversed in time due to serious scaling is avoided, and a water path is switched correspondingly.
Several detection methods will be described in detail below. For example, in a first detection mode, the electronic control module can receive a purified water TDS detection value and can control electrode reversing of the electrodialysis unit and control water channel switching when the purified water TDS detection value is equal to or greater than a purified water TDS set value. For example, the electrical control module is preset with a set value of the TDS of the purified water, receives and compares the detected TDS of the purified water detected in real time, and increases the TDS of the purified water after the purification capacity of the electrodialysis unit is decreased, so that when the detected value of the TDS of the purified water is equal to or greater than the set value of the TDS of the purified water, the electrical control module controls the polarity reversal of the electrodialysis unit (i.e. the polarity of the positive and negative electrodes is switched) and correspondingly controls the water path switching (i.e. controls the corresponding control valve to switch the water path).
In the second kind of detection mode, automatically controlled module can receive water purification TDS detected value and dense effluent TDS detected value, because electrodialysis unit's purification performance descends the back, the TDS in the water purification will increase, the TDS in the dense effluent will descend, consequently, situation one: the electronic control module can calculate the ratio of the pure water TDS detection value to the concentrated effluent TDS detection value, and when the ratio is greater than or equal to a set value, the electronic control module can control electrode reversing of the electrodialysis unit and control waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet water and the TDS detection value of the purified water, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching.
In the third kind of detection mode, automatically controlled module can receive water purification TDS detected value and raw water TDS detected value of intaking, because electrodialysis unit 1's purification performance descends the back, TDS in the water purification will increase, consequently, wherein, case one: the electronic control module can calculate the ratio of a purified water TDS detection value to a raw water inlet TDS detection value, and when the ratio is larger than or equal to a set value, the electronic control module can control electrode reversing of the electrodialysis unit and control waterway switching; alternatively, case two: the electronic control module can calculate the ratio of raw water intake TDS detection value and water purification TDS detection value, and when the ratio is less than or equal to the set value, the electronic control module can control the electrodialysis unit to reverse the pole and control the waterway switching. Thus, through the TDS detection value of the raw water inlet water, the TDS content in the water outlet water can be more accurately changed, so that the electrode reversing of the electrodialysis unit 1 can be more accurately controlled, and the water path switching can be more accurately controlled.
In the fourth kind of detection mode, electronic control module can receive dense water TDS detected value and dense water TDS detected value, because electrodialysis unit 1's purification performance descends the back, and the TDS in the dense water play water will reduce, consequently, wherein, case one: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water inlet water to the TDS detection value of the concentrated water outlet water, and when the ratio is larger than or equal to a set value, the electronic control module can control electrode reversing of the electrodialysis unit and control waterway switching; alternatively, case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet and the TDS detection value of the concentrated water inlet, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching.
Of course, the above four detection methods can be performed separately or simultaneously.
Finally, the present invention provides a water purifier capable of implementing the water purification control method as described above. Thus, the water purification efficiency and the overall quality of the water purifier are improved.
Furthermore, the water purification device may be applied to any water using device such as a water heater or a dishwasher or a whole house water system.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. The invention is not described in detail in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (18)

1. A water purifying device is characterized by comprising an electrodialysis unit (1) capable of inverting the polarity, a raw water inlet end (2), a concentrated water outlet end (3), a purified water outlet end (4) and a TDS detection unit, wherein,
the electrodialysis unit (1) comprises a first water inlet end (5), a first water outlet end (6) and a second water outlet end (7);
the raw water inlet end (2) is communicated with the first water inlet end (5), the concentrated water outlet end (3) can be communicated with one of the first water outlet end (6) and the second water outlet end (7), and the pure water outlet end (4) can be communicated with the other one of the first water outlet end (6) and the second water outlet end (7) so as to be capable of switching water paths;
the TDS detection unit is used for detecting water passing through the electrodialysis unit (1);
the electrode reversing and water path switching of the electrodialysis unit (1) are performed according to the detection value of the TDS detection unit.
2. The water purification apparatus according to claim 1, wherein the raw water inlet end (2) is capable of communicating with the first water inlet end (5) through a raw water inlet control valve (8), the concentrate water outlet end (3) is capable of communicating with one of the first water outlet end (6) and the second water outlet end (7) through a concentrate water outlet control valve (9), and the purified water outlet end (4) is capable of communicating with the other of the first water outlet end (6) and the second water outlet end (7) through a purified water outlet control valve (10).
3. Water purification apparatus according to claim 2, characterized in that it comprises an electronic control module (11), said electronic control module (11) being capable of controlling the polarity reversal of the electrodialysis unit (1) and the water circuit switching according to the value detected by the TDS detection unit.
4. A water purification apparatus according to claim 3, wherein the TDS detection unit is capable of providing a plurality of different detection modes simultaneously, the electronic control module (11) is capable of receiving a plurality of different detection modes simultaneously, and the electronic control module (11) controls the polarity reversal of the electrodialysis unit (1) and the water path switching when any one of the detection modes reaches a set value first.
5. A water purification apparatus according to claim 3 or 4, wherein the TDS detection unit comprises a purified water TDS detection unit (12), wherein the electronic control module (11) is capable of receiving a purified water TDS detection value of the purified water TDS detection unit (12) and of controlling the electrodialysis unit (1) for polarity reversal and the water circuit switching when the purified water TDS detection value is equal to or greater than a purified water TDS set value.
6. A water purification device according to claim 3 or 4, characterized in that the TDS detection unit comprises a purified water TDS detection unit (12) and a concentrate water TDS detection unit (13);
the electronic control module (11) is capable of receiving a purified water TDS detection value of the purified water TDS detection unit (12) and a concentrated effluent TDS detection value of the concentrated effluent TDS detection unit (13), wherein,
the first situation is as follows: the electronic control module can calculate the ratio of the pure water TDS detection value to the concentrated effluent TDS detection value, and when the ratio is larger than or equal to a set value, the electronic control module (11) can control the electrode reversing of the electrodialysis unit (1) and control the waterway switching;
alternatively, the first and second electrodes may be,
case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet and the TDS detection value of the purified water, and when the ratio is smaller than or equal to a set value, the electronic control module (11) can control the electrodialysis unit (1) to reverse the electrodes and control the waterway switching.
7. A water purification apparatus according to claim 3 or 4, characterized in that the TDS detection unit comprises a purified water TDS detection unit (12) and a raw water inlet TDS detection unit (14);
the electronic control module (11) is capable of receiving a purified water TDS detection value of the purified water TDS detection unit (12) and a raw water inlet TDS detection value of the raw water inlet TDS detection unit (14), wherein,
the first situation is as follows: the electronic control module (11) can calculate the ratio of the pure water TDS detection value to the raw water inlet TDS detection value, and when the ratio is larger than or equal to a set value, the electronic control module (11) can control the electrode reversing of the electrodialysis unit (1) and control the waterway switching;
alternatively, the first and second electrodes may be,
case two: the electronic control module (11) can calculate the ratio of the raw water inlet TDS detection value to the purified water TDS detection value, and when the ratio is smaller than or equal to a set value, the electronic control module (11) can control the electrodialysis unit (1) to reverse the electrodes and control the waterway switching.
8. Water purification device according to claim 3 or 4, characterized in that the water purification device comprises a concentrate water inlet end (15), the electrodialysis unit (1) comprises a second water inlet end (16);
the raw water inlet end (2) can be communicated with one of the first water inlet end (5) and the second water inlet end (16) through the raw water inlet control valve (8), and the concentrated water inlet end (15) can be communicated with the other one of the first water inlet end (5) and the second water inlet end (16) through a concentrated water inlet control valve (17) to perform waterway switching;
the TDS detection unit comprises a concentrated water inlet TDS detection unit (18) and a concentrated water outlet TDS detection unit (13);
the electronic control module (11) is capable of receiving a concentrate inlet water TDS detection value of the concentrate inlet water TDS detection unit (18) and a concentrate outlet water TDS detection value of the concentrate outlet water TDS detection unit (13), wherein,
the first situation is as follows: the electronic control module can calculate the ratio of the TDS detection value of the inlet concentrated water to the TDS detection value of the outlet concentrated water, and when the ratio is larger than or equal to a set value, the electronic control module (11) can control the electrode reversing of the electrodialysis unit (1) and control the water path switching;
alternatively, the first and second electrodes may be,
case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet water to the TDS detection value of the concentrated water inlet water, and when the ratio is smaller than or equal to a set value, the electronic control module (11) can control the electrode reversing of the electrodialysis unit (1) and control the waterway switching.
9. The water purification apparatus according to claim 8, wherein the raw water inlet control valve (8) and the concentrated water inlet control valve (17) and the concentrated water outlet control valve (9) and the purified water outlet control valve (10) are three-way valves, respectively;
the first water inlet end (5) is provided with a first three-way joint (20), the second water inlet end (16) is provided with a second three-way joint (19), the first water outlet end (6) is provided with a third three-way joint (21), and the second water outlet end (7) is provided with a fourth three-way joint (22);
one water outlet of each of the raw water inlet control valve (8) and the concentrated water inlet control valve (17) is connected with two water inlets of the first three-way joint (20), and the other water outlet of each of the raw water inlet control valve (8) and the concentrated water inlet control valve (17) is connected with two water inlets of the second three-way joint (19);
and respective water inlets of the concentrated water outlet control valve (9) and the purified water outlet control valve (10) are respectively connected with two water outlets of the third three-way joint (21), and respective other water inlets of the concentrated water outlet control valve (9) and the purified water outlet control valve (10) are respectively connected with two water outlets of the fourth three-way joint (22).
10. A water purifier characterized by comprising the water purifying apparatus according to any one of claims 1 to 9.
11. A method for controlling purified water, characterized by controlling an electrodialysis unit to perform polarity inversion and water path switching according to a change in the content of total dissolved solids in water passing through the electrodialysis unit.
12. The water purification control method of claim 11, wherein the electrodialysis unit is controlled to switch between the polarity reversing and the water circuit according to the content change of the total dissolved solids through an electric control module.
13. The water purification control method of claim 11, wherein an electronic control module receives a plurality of different detection modes for detecting the content change of total dissolved solids at the same time, and when any one detection mode reaches a set value first, the electronic control module controls the electrodialysis unit to reverse the electrodes and controls the water paths to switch.
14. The water purification control method of any one of claims 11-13, wherein the electronic control module is capable of receiving a purified water TDS detection value and controlling the electrodialysis unit to reverse polarity and control the water circuit to switch when the purified water TDS detection value is equal to or greater than a purified water TDS set value.
15. The water purification control method of any one of claims 11-13, wherein the electronic control module is capable of receiving a purified water TDS detection value and a concentrate effluent TDS detection value, wherein,
the first situation is as follows: the electronic control module can calculate the ratio of the pure water TDS detection value to the concentrated effluent TDS detection value, and when the ratio is greater than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching;
alternatively, the first and second electrodes may be,
case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet and the TDS detection value of the purified water, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrodialysis unit to reverse poles and control the waterway switching.
16. The water purification control method of any one of claims 11-13, wherein the electronic control module is capable of receiving a purified water TDS detection value and a raw water inlet TDS detection value, wherein,
the first situation is as follows: the electronic control module can calculate the ratio of the purified water TDS detection value to the raw water inlet TDS detection value, and when the ratio is larger than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching;
alternatively, the first and second electrodes may be,
case two: the electronic control module can calculate the ratio of the raw water inlet TDS detection value to the purified water TDS detection value, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrodialysis unit to invert the electrodes and control the waterway to be switched.
17. The water purification control method of any one of claims 11-13, wherein the electronic control module is capable of receiving a concentrate inlet TDS test value and a concentrate outlet TDS test value, wherein,
the first situation is as follows: the electronic control module can calculate the ratio of the TDS detection value of the inlet concentrated water to the TDS detection value of the outlet concentrated water, and when the ratio is larger than or equal to a set value, the electronic control module can control the electrode reversing of the electrodialysis unit and control the waterway switching;
alternatively, the first and second electrodes may be,
case two: the electronic control module can calculate the ratio of the TDS detection value of the concentrated water outlet water to the TDS detection value of the concentrated water inlet water, and when the ratio is smaller than or equal to a set value, the electronic control module can control the electrodialysis unit to reverse the electrodes and control the waterway switching.
18. A water purifier capable of implementing the water purification control method according to any one of claims 11 to 17.
CN202010466392.6A 2020-05-28 2020-05-28 Water purifier, water purification control method and water purifier Pending CN111470590A (en)

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