Water purifier and control method

Abstract

The present invention discloses a water purifier and a control method, wherein the water purifier includes a water production branch, a pre-device, a pressure-boosting device, a pure water return branch and a wastewater return branch, the water production branch includes a filter element water inlet, a filter element, a pure water outlet and a wastewater outlet; when the filter element meets the flushing conditions, the pure water return branch is controlled to perform a pure water return operation to flush the filter element in the first and second stages; the wastewater discharge branch is controlled to perform a wastewater discharge operation; when the second stage of flushing is performed, according to a preset control mode, the wastewater return branch is controlled to perform a first wastewater return operation to control the wastewater discharged from the wastewater outlet to flow back to the pre-device, so as to push out the raw water buffered in the pre-device and mix it with the pure water returned by the pure water return branch to flush the filter element in the second stage. It can be seen that the present invention can improve the intelligent control level of the water purifier, improve the flushing efficiency of the filter element, improve the water production rate of the water purifier, and avoid the waste of water resources.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and in particular to a water purifier and a control method thereof. Background Art

[0002] With the rapid development of water purification technology, water purifiers that filter water using devices such as reverse osmosis pressure membranes are becoming increasingly popular. However, after a water purifier has been idle for a period of time, ions from the wastewater side of the reverse osmosis pressure filter element can permeate into the pure water side, increasing the total dissolved solids (TDS) of the pure water. When the water purifier is restarted, the TDS value of the pure water initially produced is often too high, resulting in the so-called "first glass of water" problem.

[0003] In practice, the "first glass of water" problem is often addressed by using a simple water purifier with a pure water return line for timed flushing. This involves flushing the reverse osmosis pressure membrane with pure water at regular intervals. However, practice has shown that this solution is limited in scope, generates a significant amount of wastewater during the flushing process, reduces water production, and results in significant water resource waste.

[0004] It can be seen that it is particularly important to provide a water purifier and a control method to improve flushing and water production efficiency. Summary of the Invention

[0005] The present invention provides a water purifier and a control method, which can provide a multi-stage water channel control mechanism combining pure water and wastewater circulation to effectively flush and produce water for the water purifier, significantly improve the intelligent control level of the water purifier, improve the flushing efficiency of the filter element, avoid the life of the membrane affected by excessively high concentration of wastewater, increase the water production rate of the water purifier, improve the quality of drinking water, and avoid waste of water resources.

[0006] In order to solve the above technical problems, the first aspect of the present invention discloses a water purifier control method, wherein the water purifier includes a raw water branch, a produced water branch, a wastewater discharge branch, and a pure water discharge branch, wherein the produced water branch includes a filter element water inlet, a filter element, a pure water outlet, and a wastewater outlet. The water purifier is characterized in that it also includes a pre-installation device, a pure water return branch, and a wastewater return branch. A boosting device is provided on the raw water branch, and the boosting device is used to generate a water pressure difference. The boosting device is located downstream of the pre-installation device and upstream of the produced water branch. The method includes:

[0007] determining whether the filter element meets the flushing condition; when it is determined that the filter element meets the flushing condition, controlling the pure water reflux branch to perform a pure water reflux operation, wherein the pure water reflux operation is used to partially or completely reflux the pure water discharged from the pure water outlet to the boosting device and then input the pure water into the filter element inlet, so that the pure water is mixed with the raw water from the raw water branch to perform the first and second stages of flushing on the filter element;

[0008] When performing the first stage of flushing, controlling the wastewater discharge branch to perform a wastewater discharge operation;

[0009] When performing the second stage of flushing, the first adjustment parameter of the wastewater reflux branch is determined according to the preset control mode; according to the first adjustment parameter of the wastewater reflux branch, the wastewater reflux branch is controlled to perform a first wastewater reflux operation, and the first wastewater reflux operation is used to control the wastewater discharged from the wastewater outlet to flow back to the pre-device, so as to push out the raw water buffered in the pre-device and mix it with the pure water refluxed from the pure water reflux branch to perform the second stage of flushing on the filter element.

[0010] As an optional embodiment, in the first aspect of the present invention, the method further comprises:

[0011] During the first stage of flushing, determining whether the first stage of flushing is completed, and when it is determined that the first stage of flushing is completed, initiating the second stage of flushing;

[0012] Wherein, determining whether the first stage of flushing is completed includes:

[0013] determining whether the real-time water quality value of the wastewater outlet is less than or equal to a first water quality threshold, and when it is determined that the real-time water quality value of the wastewater outlet is less than or equal to the first water quality threshold, determining that the first stage of flushing has been completed; or

[0014] It is determined whether the duration of the first stage flushing exceeds a first preset duration. When it is determined that the duration of the first stage flushing exceeds the first preset duration, it is determined that the first stage flushing is completed.

[0015] As an optional embodiment, in the first aspect of the present invention, the method further comprises:

[0016] When the second stage of flushing is being performed, it is determined whether the second stage of flushing is completed. When it is determined that the second stage of flushing is completed, the pure water reflux branch is controlled to perform a closing operation.

[0017] As an optional embodiment, in the first aspect of the present invention, after controlling the pure water reflux branch to perform a closing operation, the method further includes:

[0018] determining whether a water intake instruction is received, and when it is determined that the water intake instruction is received, controlling the raw water in the raw water branch to be mixed with the water buffered in the front device and to enter the water production branch to perform a water production operation;

[0019] Controlling the pure water discharge branch to perform a pure water discharge operation, and determining a second adjustment parameter of the wastewater return branch according to the preset control mode;

[0020] According to the second adjustment parameter of the wastewater return branch, the wastewater return branch is controlled to perform a second wastewater return operation, and the second wastewater return operation is used to control the wastewater discharged from the wastewater outlet to return to the pre-device to mix with the raw water in the raw water branch and enter the pre-device.

[0021] As an optional embodiment, in the first aspect of the present invention, determining whether the second stage of flushing is completed includes:

[0022] Determining whether the real-time water quality value of the wastewater outlet is less than or equal to a second water quality threshold, and when it is determined that the first water quality value is less than or equal to the second water quality threshold, determining that the second stage of flushing has been completed; or,

[0023] Determine whether the water quality value of the mixed water formed by the wastewater discharged from the wastewater outlet and mixing with the raw water in the raw water branch is less than or equal to the third water quality threshold. When it is determined that the water quality value of the mixed water is less than or equal to the third water quality threshold, it is determined that the second stage of flushing has been completed.

[0024] As an optional embodiment, in the first aspect of the present invention, determining the first adjustment parameter of the wastewater return branch according to the preset control mode includes:

[0025] Determining, according to a preset control mode, a first adjustment parameter of the wastewater return branch, the adjustment parameter including a first adjustment duration and a second adjustment duration;

[0026] The first adjustment duration is used to indicate the duration of controlling the wastewater discharged from the wastewater outlet to flow back to the pre-installation device in a matching proportion;

[0027] The second adjustment duration is used to indicate the duration of controlling all wastewater discharged from the wastewater outlet to flow back to the pre-device.

[0028] As an optional embodiment, in the first aspect of the present invention, determining the first adjustment parameter of the wastewater return branch according to the preset control mode includes:

[0029] Determining the magnitude relationship between the real-time water quality value of the wastewater outlet and a first flushing water quality threshold and a second flushing water quality threshold; wherein the first flushing water quality threshold is greater than the second flushing water quality threshold;

[0030] When it is determined that the real-time water quality value of the wastewater outlet is less than the first flushing water quality threshold and greater than the second flushing water quality threshold, determining a first adjustment parameter of the wastewater return branch, wherein the first adjustment parameter is specifically used to control the wastewater discharged from the wastewater outlet to return to the pre-processing device in a matching proportion;

[0031] When it is determined that the real-time water quality value is less than or equal to the second flushing water quality threshold, the first adjustment parameter of the wastewater return branch is determined, and the first adjustment parameter is specifically used to control all wastewater discharged from the wastewater outlet to return to the pre-device.

[0032] As an optional embodiment, in the first aspect of the present invention, determining the second adjustment parameter of the wastewater return branch according to the preset control mode includes:

[0033] Determining whether the preset control mode is a time mode, and when it is determined that the preset control mode is the time mode, determining a second adjustment parameter of the wastewater return branch according to the preset control mode, the second adjustment parameter including a duration for controlling the proportional return of wastewater in the wastewater return branch;

[0034] determining whether the preset control mode is a water quality mode, and when it is determined that the control mode is the water quality mode, determining a second adjustment parameter of the wastewater return branch according to a real-time water quality value of the wastewater outlet when the water production branch is producing water;

[0035] The method of determining the second adjustment parameter of the wastewater return branch according to the real-time water quality value of the wastewater outlet when the water production branch produces water includes:

[0036] Determine the relationship between the real-time water quality value of the wastewater outlet and a first water quality threshold and a second water quality threshold when the water production branch performs a water production operation; wherein the first water quality threshold is less than the second water quality threshold;

[0037] When it is determined that the real-time water quality value of the wastewater outlet is less than the second water quality threshold, determining the wastewater return ratio of the wastewater return branch according to the relationship between the real-time water quality value and the first water quality threshold and the second water quality threshold;

[0038] A second adjustment parameter of the wastewater return branch is generated according to the wastewater return ratio.

[0039] Determine whether the first water quality value of the wastewater outlet exceeds a fourth water quality threshold, and when it is determined that the first water quality value exceeds the fourth water quality threshold, determine that the filter element meets the flushing condition; or,

[0040] Determine whether the second water quality value at the water inlet of the filter element exceeds a fifth water quality threshold value, and when it is determined that the second water quality value exceeds the fifth water quality threshold value, determine that the filter element meets the flushing condition; or,

[0041] Determine whether the time difference between the current time point and the time point at which the water production branch was last flushed exceeds a second preset time length. When it is determined that the time difference between the current time point and the time point at which the water production branch was last flushed exceeds the second preset time length, determine that the filter element meets the flushing condition; or

[0042] Determine whether the operating time of the water production branch exceeds a third preset time. When it is determined that the operating time of the water production branch exceeds the third preset time, determine that the filter element meets the flushing condition, wherein the operating time includes a single water production operating time or the total duration of the most recent N water production operating times; or

[0043] Determine whether the water production volume of the water production branch exceeds a preset water volume. When it is determined that the water production volume of the water production branch exceeds the preset water volume, determine that the filter element meets the flushing condition, wherein the water production volume includes a single water production volume or the sum of the water volumes of the most recent N water productions; or

[0044] Determine whether the third water quality value of the pure water outlet exceeds a sixth water quality threshold, and when it is determined that the third water quality value of the pure water outlet exceeds the sixth water quality threshold, determine that the filter element meets the flushing condition; or,

[0045] Determine whether the water production times of the water production branch exceed the preset water production times. When it is determined that the water production times of the water production branch exceed the preset water production times, determine that the filter element meets the flushing conditions, wherein the water production times include the sum of the water production times between the current time point and the time point when the most recent flushing of the water production branch is completed or the total water production times within the water production life cycle of the water production branch.

[0046] A second aspect of the present invention discloses a water purifier, comprising a water production branch, the water production branch comprising a filter element water inlet, a filter element, a pure water outlet, and a wastewater outlet, the filter element water inlet being connected to a raw water branch, the pure water outlet being connected to a pure water discharge branch, and the wastewater outlet being connected to a wastewater discharge branch, the water purifier further comprising:

[0047] The raw water branch is provided with a pressure boosting device, which is used to generate a water pressure difference and is located upstream of the produced water branch;

[0048] A pure water reflux branch, wherein the pure water reflux branch and the pure water discharge branch intersect at a first pure water reflux intersection, and the pure water reflux branch and the raw water branch intersect at a second pure water reflux intersection; when it is determined that the filter element meets the flushing conditions, the pure water reflux branch is used to return part or all of the pure water discharged from the pure water outlet to the boosting device and then input it into the filter element water inlet, so that it is mixed with the raw water in the raw water branch to perform the first and second stage flushing of the filter element; when the first stage flushing is performed, the wastewater discharge branch is used to discharge the wastewater discharged from the wastewater outlet; the boosting device is located downstream of the second pure water reflux intersection;

[0049] The raw water branch is provided with a pre-processing device, which is used to buffer the raw water of the raw water branch and / or the wastewater discharged back from the wastewater outlet;

[0050] The wastewater return branch intersects with the wastewater discharge branch at a first wastewater return intersection, and the wastewater return branch intersects with the raw water branch at a second wastewater return intersection; when performing the second stage of flushing, the wastewater return branch is used to return the wastewater discharged from the wastewater outlet to the pre-device, so as to push out the raw water buffered in the pre-device and mix it with the pure water returned by the pure water return branch to perform the second stage of flushing on the filter element; wherein, the pre-device is located downstream of the second wastewater return intersection and upstream of the second pure water return intersection.

[0051] As an optional embodiment, in the second aspect of the present invention, a pure water reflux valve assembly is provided on the pure water reflux branch; a waste water reflux valve assembly is provided on the waste water reflux branch; a pure water valve assembly is provided on the pure water discharge branch; and a waste water valve assembly is provided on the waste water discharge branch.

[0052] As an optional embodiment, in the second aspect of the present invention, the water purifier further includes:

[0053] A water quality detection device is provided on the branch line connected to the wastewater outlet, and the water quality detection device is used to monitor the real-time water quality value of the wastewater outlet;

[0054] Wherein, the water quality detection device includes:

[0055] A first water quality detection device provided at the wastewater outlet; or / and,

[0056] A second water quality detection device provided on the wastewater return branch; or / and,

[0057] A third water quality detection device is provided on the wastewater discharge branch.

[0058] As an optional embodiment, in the second aspect of the present invention, when the wastewater return branch and the wastewater discharge branch share part of the branch, a wastewater ratio device is provided on the branch shared by the wastewater return branch and the wastewater discharge branch, and the wastewater ratio device is used to adjust the water volume ratio of the wastewater discharged from the wastewater outlet flowing into the wastewater return branch and the wastewater discharge branch respectively.

[0059] As an optional embodiment, in the second aspect of the present invention, a fourth water quality detection device is provided at the water inlet of the filter element of the water production branch, and the fourth water quality detection device is used to detect the water quality of the water inlet of the filter element.

[0060] As an optional embodiment, in the second aspect of the present invention, a fifth water quality detection device is provided on the raw water branch, and the fifth water quality detection device is located downstream of the second wastewater backflow intersection and upstream of the pre-device. The fifth water quality detection device is used to detect the water quality of the mixed water formed by the wastewater discharged from the wastewater outlet and mixed with the raw water in the raw water branch after the wastewater is backflowed.

[0061] As an optional embodiment, in the second aspect of the present invention, a sixth water quality detection device is provided on the pure water discharge branch, and the sixth water quality detection device is located between the pure water outlet and the pure water valve assembly, and the sixth water quality detection device is used to detect the water quality of the pure water discharged from the pure water outlet.

[0062] As an optional embodiment, in the second aspect of the present invention, a seventh water quality detection device is also provided on the raw water branch, and the seventh water quality detection device is located upstream of the second wastewater backflow intersection. The seventh water quality detection device is used to detect the water quality of the raw water in the raw water branch.

[0063] A third aspect of the present invention discloses another water purifier control device, the device comprising:

[0064] a memory storing executable program code;

[0065] a processor coupled to the memory;

[0066] The processor calls the executable program code stored in the memory to execute part or all of the steps in any one of the water purifier control methods disclosed in the first aspect of the present invention.

[0067] The fourth aspect of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute some or all of the steps in any water purifier control method disclosed in the first aspect of the present invention.

[0068] Compared with the prior art, the present invention has the following beneficial effects:

[0069] In the present invention, the water purifier includes a water production branch, a pre-device, a pure water return branch and a wastewater return branch. The water production branch includes a filter element water inlet, a filter element, a pure water outlet and a wastewater outlet; when the filter element meets the flushing conditions, the pure water return branch is controlled to perform a pure water return operation to perform the first and second stage flushing of the filter element; the wastewater discharge branch is controlled to perform a wastewater discharge operation; when performing the second stage of flushing, according to the real-time water quality value of the wastewater outlet, the wastewater return branch is controlled to perform the first wastewater return operation, which is used to control the wastewater discharged from the wastewater outlet to flow back to the pre-device, so as to push out the raw water cached in the pre-device and mix it with the pure water returned by the pure water return branch to perform the second stage of flushing the filter element. It can be seen that the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation to effectively flush and produce water for the water purifier, significantly improve the intelligent control level of the water purifier, improve the flushing efficiency of the filter element, avoid excessively high concentrations of wastewater affecting the life of the membrane, increase the water production rate of the water purifier, improve the quality of drinking water, and avoid waste of water resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0070] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0071] Figure 1 This is a flow chart of a water purifier control method disclosed in an embodiment of the present invention;

[0072] Figure 2 This is a flow chart of another water purifier control method disclosed in an embodiment of the present invention;

[0073] Figure 3 This is a structural diagram of a water purifier disclosed in an embodiment of the present invention;

[0074] Figure 4 This is a structural diagram of another water purifier disclosed in an embodiment of the present invention;

[0075] Figure 5 It is a structural schematic diagram of a water purifier control device disclosed in an embodiment of the present invention.

[0076] The numbers in the figure represent the following meanings: water production branch 1; pure water reflux valve assembly 2; wastewater reflux valve assembly 3; first water quality detection device 4; pre-device 5; pure water valve assembly 6; wastewater valve assembly 7; second water quality detection device 8; third water quality detection device 9; wastewater proportioning device 10; seventh water quality detection device 11; sixth water quality detection device 12; fourth water quality detection device 13; fifth water quality detection device 14; boosting device 15; first pure water reflux intersection A; second pure water reflux intersection B; first wastewater reflux intersection C; second wastewater reflux intersection D. DETAILED DESCRIPTION

[0077] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0078] The terms "first," "second," and so on, in the description and claims of the present invention and the accompanying drawings are used to distinguish between different items, not to describe a specific order. Furthermore, the terms "including," "having," and any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product, or end comprising a series of steps or elements is not limited to the listed steps or elements but may optionally include steps or elements not listed therein, or may optionally include other steps or elements inherent to such process, method, product, or end.

[0079] References herein to "embodiments" mean that a particular feature, structure, or characteristic described in connection with the embodiments may be included in at least one embodiment of the present invention. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute a separate or alternative embodiment that is mutually exclusive of other embodiments. It is understood, both explicitly and implicitly, by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0080] The present invention discloses a water purifier and control method. The water purifier and control method provide a multi-stage waterway control mechanism that combines pure water and wastewater circulation to effectively flush and produce water for the water purifier, significantly improving the intelligent control level of the water purifier, improving the flushing efficiency of the filter element, avoiding the impact of excessively high concentrations of wastewater on the life of the membrane, increasing the water production rate of the water purifier, improving the quality of drinking water, and avoiding the waste of water resources. In addition, one or more embodiments of the present invention can be applied to any water purification system, such as household water purifiers, commercial water purifiers, water purification devices for water purification plants, etc., and the embodiments of the present invention are not limited thereto.

[0081] Example 1

[0082] See also Figure 1 , Figure 1 This is a flow chart of a water purifier control method disclosed in an embodiment of the present invention. Figure 1 As shown, the water purifier control method may include the following operations:

[0083] 101. Determine whether the filter element meets the flushing conditions.

[0084] In an embodiment of the present invention, the water purifier includes a raw water branch, a produced water branch, a wastewater discharge branch and a pure water discharge branch. The produced water branch includes a filter element water inlet, a filter element, a pure water outlet and a wastewater outlet. The water purifier also includes a pre-device, a pure water return branch and a wastewater return branch. The raw water branch is provided with a boosting device for generating a water pressure difference, which can be used to allow the pressurized water to penetrate through the filter element, and can also be used to control the reflux of water in the pure water return branch and the wastewater return branch. The boosting device is located upstream of the produced water branch. After flowing through the pre-processor and being pressurized by the booster, the raw water is fed into the filter inlet of the water production branch. The filter in the water production branch filters the raw water into pure water and wastewater. The pure water can flow back through the pure water return branch downstream of the pre-processor and then be fed into the water production branch through the booster, or it can be discharged through the pure water discharge branch. The wastewater can flow back through the wastewater return branch upstream of the pre-processor and then be fed into the pre-processor, or it can be discharged through the wastewater discharge branch. The method of the present invention requires determining whether the filter element meets the flushing conditions and only initiates the flushing operation when the flushing conditions are met. For example, after a user has accumulated a certain volume of water, the flushing operation is initiated by detecting that the TDS at the wastewater outlet changes to a certain value. In embodiments of the present invention, the pre-processor is used to buffer water input from the raw water branch and / or the wastewater return branch. The pre-processor can include a single-chamber water storage device, a multi-chamber water storage device, an airbag water storage device, a filter device, etc., and the embodiments of the present invention are not limited thereto. In addition, it should be noted that the present invention does not limit the capacity of the front-end device. Preferably, the capacity of the front-end device is not fixed but adjustable.

[0085] 102. When it is determined that the filter element meets the flushing conditions, the pure water reflux branch is controlled to perform the pure water reflux operation to perform the first and second stage flushing of the filter element.

[0086] In an embodiment of the present invention, when it is determined that the filter element meets the flushing conditions, it indicates that the filter element needs to be flushed. In an embodiment of the present invention, the flushing of the filter element is divided into two stages: the first stage of flushing and the second stage of flushing. Regardless of whether it is the first stage of flushing or the second stage of flushing, it is necessary to control the pure water to flow back along the pure water reflux branch to the boosting device and then input it into the filter element water inlet of the water production branch to flush the filter element, that is, the above-mentioned control of the pure water reflux branch to perform the pure water reflux operation. In addition, it should be noted that the pure water reflux can be the reflux of part of the pure water or the reflux of all the pure water, and the embodiment of the present invention does not limit this. For example, the controller can control the valve assembly on the pure water reflux branch to realize the operation of controlling whether the pure water refluxes and controlling the flow rate of the pure water reflux.

[0087] 103. During the first stage of flushing, the wastewater discharge branch is controlled to perform wastewater discharge operations.

[0088] In an embodiment of the present invention, during the first stage of flushing, only pure water or a mixture of pure water and raw water is input into the filter element water inlet of the water production branch. At this time, the water quality value of the input water (for example, TDS, alkalinity, hardness, etc., which are not limited in the embodiment of the present invention) is obviously very small (that is, the water quality is good), which can achieve a good flushing effect on the filter element. At the same time, the wastewater discharge branch is controlled to be fully open, and all wastewater with higher water quality values ​​generated by flushing is discharged. For example, during the first stage of flushing, when the TDS value at the wastewater outlet of the water production branch is detected to be higher than 200, all wastewater generated by flushing is discharged.

[0089] 104. During the second stage of flushing, determine the first adjustment parameter of the wastewater return branch according to the preset control mode; and control the wastewater return branch to perform the first wastewater return operation according to the first adjustment parameter of the wastewater return branch.

[0090] In this embodiment of the present invention, before the second stage of flushing, the pre-processor acts as a water buffer, already storing raw water from the raw water branch. During the second stage of flushing, while controlling the pure water return branch to perform pure water return, the timing and flow rate of wastewater return can be controlled according to a preset control mode. The preset control mode can be a time mode, a water quality mode, or a combination of these modes, and is not limited in this embodiment of the present invention.

[0091] Among them, the time mode can achieve the user's water collection purpose by presetting the working time of each control stage of the water purifier and controlling the start time and end time of each stage. Specifically, the first adjustment parameter of the wastewater return branch is determined, and the adjustment parameters include the first adjustment time and the second adjustment time; the first adjustment time is used to indicate the duration of the wastewater discharged from the wastewater outlet to flow back to the front device in a matching proportion; the second adjustment time is used to indicate the duration of all wastewater discharged from the wastewater outlet to flow back to the front device. For example, if the first adjustment time and the second adjustment time are 10 seconds and 20 seconds respectively, a 10-second mixed water flush (the proportion of wastewater return gradually changes from 0% to 100% during the flushing process) and a 20-second wastewater flush can be achieved to realize the overall flushing operation.

[0092] Among them, the water quality mode can determine the first adjustment parameter of the wastewater return branch according to the real-time water quality value of the wastewater outlet of the water production branch monitored in real time, and then control the flow rate of the wastewater return through the first adjustment parameter (that is, the first wastewater return operation mentioned above), so as to input the wastewater returned through the wastewater return branch into the pre-device, push out the raw water buffered in the pre-device, mix this part of the raw water with the pure water returned from the pure water return branch to form mixed water, and perform the second stage of flushing on the filter element. It should be noted that while a part of the wastewater returned through the wastewater return branch is pushed out of the raw water in the pre-device, the pre-device can also buffer this part of the wastewater therein.

[0093] It can be seen that the method described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation to effectively flush and produce water for the water purifier, significantly improve the intelligent control level of the water purifier, improve the flushing efficiency of the filter element, avoid excessively high concentrations of wastewater affecting the life of the membrane, increase the water production rate of the water purifier, improve the quality of drinking water, and avoid waste of water resources.

[0094] In an optional real-time example, determining whether the filter element meets the flushing conditions may also include the following operations:

[0095] Determine whether the first water quality value of the wastewater outlet exceeds a fourth preset threshold value, and when it is determined that the first water quality value exceeds the fourth preset threshold value, determine that the filter element meets the flushing condition; or,

[0096] Determine whether the second water quality value at the filter element water inlet exceeds a fifth preset threshold value. When it is determined that the second water quality value exceeds the fifth preset threshold value, the filter element is determined to meet the flushing condition; or,

[0097] Determine whether the time difference between the current time point and the time point at which the water production branch was last flushed exceeds a second preset time length. When it is determined that the time difference between the current time point and the time point at which the water production branch was last flushed exceeds the second preset time length, it is determined that the filter element meets the flushing condition; or,

[0098] Determine whether the operating time of the water production branch exceeds a third preset time. When it is determined that the operating time of the water production branch exceeds the third preset time, determine that the filter element meets the flushing condition, wherein the operating time includes the single water production operating time or the total duration of the most recent N water production operating times; or

[0099] Determine whether the water production volume of the water production branch exceeds the preset water volume. When it is determined that the water production volume of the water production branch exceeds the preset water volume, it is determined that the filter element meets the flushing conditions, wherein the water production volume includes the single water production volume or the sum of the water volumes of the most recent N water productions; or

[0100] Determine whether the third water quality value of the pure water outlet exceeds a sixth preset threshold value. When it is determined that the third water quality value of the pure water outlet exceeds the sixth preset threshold value, it is determined that the filter element meets the flushing condition; or,

[0101] Determine whether the water production times of the water production branch exceed the preset water production times. When it is determined that the water production times of the water production branch exceed the preset water production times, the filter element is determined to meet the flushing conditions, where the water production times include the sum of the water production times between the current time point and the time point when the most recent flushing of the water production branch is completed or the total water production times within the water production life cycle of the water production branch.

[0102] In embodiments of the present invention, the filter element can be determined to have met the flushing requirements by monitoring whether the water quality at the wastewater outlet of the water production branch exceeds a preset threshold. When the water quality at the wastewater outlet is significantly higher than the preset threshold, it indicates that the salinity level in the filter element is high and flushing is necessary. When the wastewater recirculation is activated, the filter element can also be determined to have met the flushing requirements by monitoring whether the water quality of the mixed water exiting the filter element inlet of the water production branch exceeds a preset threshold. When the water quality of the mixed water exceeds the preset threshold, it indicates that the salinity level in the reflowing wastewater is high and the filter element needs to be flushed. The need for flushing can also be determined by determining whether the time difference between the current time point and the time point when the most recent flush of the water production branch ended exceeds a preset duration. The preset duration can be set based on historical cleaning time and frequency, enabling timed flushing. Taking into account the actual usage of the filter element, this can also be determined by determining whether the operating time of the water production branch exceeds a preset duration, whether the water production volume of the water production branch exceeds a preset volume, or whether the water production frequency of the water production branch exceeds a preset number of times. In addition, it is also possible to judge by monitoring whether the water quality value at the pure water outlet of the water production branch exceeds the preset threshold. When the water quality value at the pure water outlet exceeds the preset threshold, it means that a certain degree of salt has accumulated in the filter element, causing the salt to reversely seep into the pure water, making the pure water quality deteriorate, and the filter element needs to be flushed.

[0103] It can be seen that the method described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation to effectively flush the water purifier. At the same time, it also proposes a variety of methods for detecting whether the filter element meets the flushing conditions, which can more accurately monitor the use of the filter element to achieve accurate flushing of the filter element, avoid unnecessary flushing operations, further improve the filter element flushing effect, and increase the water production rate of the water purifier.

[0104] In another optional embodiment, the present invention may further include the following operations:

[0105] When the first stage of flushing is being performed, it is determined whether the first stage of flushing is completed, and when it is determined that the first stage of flushing is completed, the second stage of flushing is started;

[0106] The determination of whether the first stage of flushing is completed includes:

[0107] Determine whether the real-time water quality value of the wastewater outlet is less than or equal to the first water quality threshold value. When it is determined that the real-time water quality value of the wastewater outlet is less than or equal to the first water quality threshold value, it is determined that the first stage of flushing has been completed; or,

[0108] It is determined whether the duration of the first stage flushing exceeds the first preset duration. When it is determined that the duration of the first stage flushing exceeds the first preset duration, it is determined that the first stage flushing is completed.

[0109] In the embodiment of the present invention, the accurate connection process between the flushing operation of the first stage and the flushing operation of the second stage can be achieved by determining whether the flushing of the first stage is completed. In an embodiment of the present invention, the first method can be determined by detecting whether the real-time water quality value of the wastewater outlet is less than or equal to a first water quality threshold. Because during the first stage of flushing, only pure water or a mixture of pure water and raw water is input into the filter element inlet of the water production branch to flush the filter element, the real-time water quality value of the wastewater outlet is continuously decreasing. When it is detected to be lower than the first water quality threshold, it can be determined that the first stage of flushing has been completed. For example, during the first stage of flushing, when the TDS value at the wastewater outlet of the water production branch is detected to be less than or equal to 200, the first stage of flushing operation can be considered to be completed. The second method is to determine by the duration of the first stage of flushing, that is, timing determination. When it is determined that the duration of the first stage of flushing exceeds a first preset duration, the first stage of flushing is determined to be completed. For example, the timer starts from the time when the filter element meets the flushing conditions and controls the pure water return branch to perform the pure water return operation, which is used as the start time of the first node flushing operation. When the duration of the first flushing operation exceeds 30 seconds, the first stage of flushing operation can be considered to be completed.

[0110] It can be seen that the method described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation to effectively flush the water purifier. Through a variety of control methods, the accurate connection nodes and processes between each stage can be accurately controlled, thereby improving the control accuracy during the filter element flushing process, thereby achieving accurate flushing of the filter element, avoiding unnecessary flushing operations, further improving the filter element flushing effect, and improving the water production rate of the water purifier.

[0111] In yet another optional embodiment, determining the first adjustment parameter of the wastewater return branch according to the real-time water quality value of the wastewater outlet includes:

[0112] Determine the relationship between the real-time water quality value of the wastewater outlet and the first flushing water quality threshold and the second flushing water quality threshold; wherein the first flushing water quality threshold is greater than the second flushing water quality threshold;

[0113] When it is determined that the real-time water quality value of the wastewater outlet is less than the first flushing water quality threshold and greater than the second flushing water quality threshold, a first adjustment parameter of the wastewater return branch is determined, and the first adjustment parameter is specifically used to control the wastewater discharged from the wastewater outlet to return to the pre-processing device according to a matching ratio;

[0114] When it is determined that the real-time water quality value is less than or equal to the second flushing water quality threshold, the first adjustment parameter of the wastewater return branch is determined. The first adjustment parameter is specifically used to control all wastewater discharged from the wastewater outlet to return to the pre-device.

[0115] In an embodiment of the present invention, during the dual-circulation flushing process of pure water recirculation and wastewater recirculation, i.e., the second stage of flushing, the real-time water quality value of the wastewater outlet of the water production branch is monitored, and the water volume of the wastewater discharge branch and the wastewater return branch can be dynamically adjusted based on the real-time water quality value to achieve the optimal flushing effect while also saving water. In this embodiment of the present invention, two flushing water quality thresholds are set: a first flushing water quality threshold and a second flushing water quality threshold, wherein the first flushing water quality threshold is less than the second flushing water quality threshold. When it is determined that the real-time water quality value is greater than or equal to the first flushing water quality threshold, it indicates that it is the initial stage of the second stage of flushing or is still the first stage of flushing. At this time, the real-time water quality value of the wastewater discharged from the wastewater outlet of the filter element is high, and the wastewater is not suitable for recirculation and reuse. At this time, the first adjustment parameter of the wastewater return branch is adjusted to control the wastewater return branch to be completely closed and the wastewater discharge branch to be completely opened, thereby discharging all the wastewater generated at this time. As the flushing process progresses, the salt content in the filter element becomes less and less due to flushing, and the real-time water quality value of the wastewater outlet also gradually decreases. When the real-time water quality value is monitored to be less than the first flushing water quality threshold and greater than the second flushing water quality threshold, the wastewater can be returned to the pre-processing device through the wastewater return branch. At this time, the first adjustment parameter of the wastewater return branch is adjusted to return the wastewater discharged from the wastewater outlet to the pre-processing device according to a matching ratio, that is, to control the wastewater return branch to gradually increase the wastewater return water volume and the wastewater discharge branch to gradually reduce the wastewater discharge water volume. The specific proportional relationship can be adjusted according to actual conditions and is not limited in the embodiments of the present invention. For example, the first flushing water quality threshold and the second flushing water quality threshold are set to 10 and 5 respectively. At this time, the first real-time water quality value monitored is 8. Then, according to the proportional relationship, the first adjustment parameter of the wastewater return branch can be adjusted so that 40% (2 / 5) of the wastewater discharged from the wastewater outlet is returned through the wastewater return branch and 60% (3 / 5) is discharged through the wastewater discharge branch. When it is determined that the real-time water quality value is less than or equal to the second flushing water quality threshold, it means that the water quality discharged from the wastewater outlet is good at this time and can all be returned to the front device for reuse. At this time, the first adjustment parameter of the wastewater return branch is adjusted to control the wastewater return branch to be fully opened, and the wastewater discharge branch is controlled to be completely closed.

[0116] It can be seen that the method described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation, so as to effectively flush the water purifier while monitoring the water quality value of the wastewater at the wastewater outlet. Without increasing the salinity of the filter element, the proportion of wastewater recycling can be dynamically adjusted to achieve the level of fine regulation of wastewater backflow, which is conducive to the precise flushing of the filter element and further improves the filter element flushing effect. At the same time, it can also provide a basis for the subsequent recovery and reuse of some low-concentration wastewater, and further improve the water production rate of the water purifier.

[0117] Example 2

[0118] See also Figure 1 , Figure 1 This is a flow chart of a water purifier control method disclosed in an embodiment of the present invention. Figure 1 As shown, the water purifier control method may include the following operations:

[0119] 201. Determine whether the filter element meets the flushing conditions.

[0120] 202. When it is determined that the filter element meets the flushing conditions, the pure water reflux branch is controlled to perform the pure water reflux operation to perform the first and second stage flushing of the filter element.

[0121] 203. During the first stage of flushing, the wastewater discharge branch is controlled to perform wastewater discharge operations.

[0122] 204. During the second stage of flushing, determine a first adjustment parameter of the wastewater return branch according to a preset control mode; and control the wastewater return branch to perform a first wastewater return operation according to the first adjustment parameter of the wastewater return branch.

[0123] 205. Determine whether the second stage of flushing is completed. When it is determined that the second stage of flushing is completed, control the pure water reflux branch to perform a closing operation.

[0124] In an embodiment of the present invention, during the dual-circulation flushing process of pure water reflux and wastewater reflux, as the flushing continues, the water quality value in the filter element is in a continuous decreasing process. When it is determined that the second stage of flushing has been completed, the pure water reflux branch is controlled to perform a closing operation.

[0125] Furthermore, determining whether the second stage of flushing is completed may include the following operations:

[0126] Determine whether the real-time water quality value of the wastewater outlet is less than or equal to the second water quality threshold value. When it is determined that the first water quality value is less than or equal to the second water quality threshold value, it is determined that the second stage of flushing has been completed; or,

[0127] Determine whether the water quality value of the mixed water formed by the wastewater discharged from the wastewater outlet and the raw water in the raw water branch after the wastewater flows back is less than or equal to the third water quality threshold. When it is determined that the water quality value of the mixed water is less than or equal to the third water quality threshold, it is determined that the second stage of flushing has been completed.

[0128] In an embodiment of the present invention, during the flushing process of the second stage, it is possible to determine whether the second stage of flushing is completed by determining whether the real-time water quality value of the wastewater outlet is less than or equal to the second water quality threshold value or determining whether the water quality value of the mixed water formed by the wastewater discharged from the wastewater outlet and mixed with the raw water in the raw water branch after the wastewater is returned is less than or equal to the third water quality threshold value. It should be noted that, with reference to the flushing process of the first stage, it is also possible to determine whether the second stage of flushing is completed by time or duration alone. For example, it is determined that the timing starts from the end moment of the first stage of flushing and calculates whether the duration of the second stage of flushing exceeds the preset duration. For example, when the duration of the second flushing operation is detected to be more than 20 seconds, it can be considered that the second stage of flushing is completed.

[0129] Furthermore, to improve the accuracy of the judgment, the judgment may be made in conjunction with the time dimension. For example, the judgment may be made by determining whether the water quality value of the mixed water formed by the wastewater discharged from the wastewater outlet and mixed with the raw water in the raw water branch is less than the third water quality threshold for a period of time greater than a preset time.

[0130] It can be seen that the method described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation to effectively flush the water purifier. At the same time, it can also accurately control the accurate connection nodes and processes between each stage through a variety of control methods, thereby improving the control accuracy during the filter element flushing process, thereby achieving accurate flushing of the filter element, avoiding unnecessary flushing operations, further improving the filter element flushing effect, and improving the water production rate of the water purifier.

[0131] In an optional embodiment, after controlling the pure water reflux branch to perform the closing operation in step 205, the following operation is further included:

[0132] 206. Determine whether a water fetching instruction is received. When it is determined that a water fetching instruction is received, control the raw water in the raw water branch to mix with the water buffered in the front device and enter the water production branch to perform a water production operation.

[0133] In an embodiment of the present invention, after the pure water reflux branch is controlled to perform a closing operation in step 205, it indicates that the filter element has been flushed (including the first stage of flushing and the second stage of flushing). Within a certain period of time, if a user water extraction instruction is received, the mixed water of raw water and wastewater cached in the pre-installed device still maintains a good water quality, and the water production operation can be performed by directly utilizing the pre-installed device mixed water and the wastewater reflux cycle. At this time, the pure water discharge branch is controlled to perform a pure water discharge operation to provide the pure water required by the above-mentioned water extraction instruction, and the second adjustment parameter of the wastewater reflux branch is determined according to the preset control mode. At the same time, according to the second adjustment parameter of the wastewater reflux branch, the wastewater reflux branch is controlled to perform a second wastewater reflux operation. The second wastewater reflux operation is used to control the wastewater discharged from the wastewater outlet of the water production branch during the water production process to flow back to the pre-installed device to mix with the raw water in the raw water branch and enter the pre-installed device.

[0134] It can be seen that the method described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation. After the water purifier is effectively flushed, the mixed water production operation is continued through the wastewater backflow circulation, thereby forming the reuse of the mixed water in the front device and the wastewater in the water production process, achieving the purpose of secondary water saving, and can solve the problem of poor water quality of the first cup of water when the user takes water. At the same time, it improves the water production rate of the water purifier and avoids waste of water resources.

[0135] In another optional embodiment, determining the second adjustment parameter of the wastewater return branch according to the preset control mode includes:

[0136] Determining whether the preset control mode is a time mode, and when it is determined that the preset control mode is the time mode, determining a second adjustment parameter of the wastewater return branch according to the preset control mode, the second adjustment parameter including a duration for controlling the proportional return of wastewater in the wastewater return branch;

[0137] Determine whether the preset control mode is the water quality mode. When it is determined that the control mode is the water quality mode, determine the second adjustment parameter of the wastewater return branch according to the real-time water quality value of the wastewater outlet when the water production branch is producing water;

[0138] Wherein, determining the second adjustment parameter of the wastewater return branch according to the real-time water quality value of the wastewater outlet when the water production branch produces water includes:

[0139] Determine the relationship between the real-time water quality value of the wastewater outlet when the water production branch performs the water production operation and the first water production quality threshold and the second water production quality threshold; wherein the first water production quality threshold is less than the second water production quality threshold;

[0140] When it is determined that the real-time water quality value of the wastewater outlet is less than the second water quality threshold, the wastewater return ratio of the wastewater return branch is determined according to the relationship between the real-time water quality value and the first water quality threshold and the second water quality threshold;

[0141] A second adjustment parameter of the wastewater return branch is generated according to the wastewater return ratio.

[0142] In an embodiment of the present invention, two water quality thresholds are set, a first water quality threshold and a second water quality threshold, wherein the first water quality threshold is less than the second water quality threshold. The second adjustment parameter of the wastewater return branch can be dynamically determined based on the relationship between the real-time water quality value of the wastewater outlet when the water production branch performs the water production operation and the first water quality threshold and the second water quality threshold. The second adjustment parameter is used to control the wastewater return branch to perform the wastewater return operation, which is specifically used to return the wastewater discharged from the wastewater outlet during the water production process using mixed water by the water production branch. It should be noted that the second adjustment parameter of the wastewater return branch can be dynamically determined by referring to the method for determining the first adjustment parameter in Example 1. When it is determined that the real-time water quality value of the wastewater outlet is less than or equal to the first water quality threshold when the water production branch performs the water production operation, it indicates that this is the initial stage of mixed water production and the water quality value of the returned wastewater is low. At this time, the second adjustment parameter of the wastewater return branch is adjusted to control the wastewater return branch to be fully open and the wastewater discharge branch to be fully closed, so that all the wastewater produced at this time is returned. As the wastewater return cycle is executed, the real-time water quality value of the wastewater outlet when the water production branch performs the water production operation continues to increase. When the real-time water quality value is monitored to be greater than the first water quality threshold and less than the second water quality threshold, the second adjustment parameter of the wastewater return branch is adjusted to proportionally return the wastewater discharged from the wastewater outlet, that is, to control the wastewater return branch to gradually reduce the wastewater return water volume and the wastewater discharge branch to gradually increase the wastewater discharge water volume. The specific proportional relationship can be adjusted according to actual conditions and is not limited in the embodiments of the present invention. For example, the first water quality threshold and the second water quality threshold are set to 5 and 10 respectively. At this time, the real-time water quality value of the wastewater outlet monitored when the water production branch performs the water production operation is 8. Then, based on the proportional relationship, the second adjustment parameter of the wastewater return branch can be adjusted so that 40% (2 / 5) of the wastewater discharged from the wastewater outlet is returned through the wastewater return branch, and 60% (3 / 5) is discharged through the wastewater discharge branch. When it is determined that the real-time water quality value of the wastewater outlet when the water production branch performs the water production operation is greater than or equal to the second water quality threshold, it means that the water quality discharged from the wastewater outlet is poor at this time, and the wastewater is not convenient to be returned for reuse. At this time, the second adjustment parameter of the wastewater return branch is adjusted to control the wastewater return branch to be completely closed, and to control the wastewater discharge branch to be completely open, so that all the wastewater generated at this time is discharged.

[0143] It can be seen that the method described in the embodiment of the present invention can provide a multi-stage water control mechanism that combines pure water and wastewater circulation to effectively flush the water purifier. By monitoring the water quality value of the wastewater at the wastewater outlet, the proportion of wastewater recycling can be dynamically adjusted to achieve a level of fine regulation of wastewater return, which is conducive to achieving precise control of mixed water production and further improving the water production rate of the water purifier.

[0144] Example 3

[0145] See also Figure 3 , Figure 3 This is a schematic diagram of the structure of a water purifier disclosed in an embodiment of the present invention. Figure 3 As shown, the water purifier includes a water production branch 1, which includes a filter element water inlet, a filter element, a pure water outlet and a waste water outlet. The filter element water inlet is connected to a raw water branch, the pure water outlet is connected to a pure water discharge branch, and the waste water outlet is connected to a waste water discharge branch. The filter element can be an ordinary filter element or a reverse osmosis filter element, which is not limited in the embodiment of the present invention. When the filter element is a reverse osmosis filter element, a boosting device 15 can also be provided upstream of the water production branch 1. The boosting device 15 is used to generate a water pressure difference that can be used to allow the pressurized water to penetrate the filter element, and can also control the reflux of water in the following pure water return branch and the waste water return branch. The water purifier can also include:

[0146] A water quality detection device 4 is provided on the branch line connected to the wastewater outlet, and the water quality detection device 4 is used to monitor the real-time water quality value of the wastewater outlet;

[0147] A pure water reflux branch, wherein the pure water reflux branch and the pure water discharge branch intersect at a first pure water reflux intersection A, and the pure water reflux branch and the raw water branch intersect at a second pure water reflux intersection B; when it is determined that the filter element meets the flushing conditions, the pure water reflux branch is used to return part or all of the pure water discharged from the pure water outlet to the booster device 15 and then input it into the filter element water inlet, so that it is mixed with the raw water from the raw water branch to perform the first and second stage flushing of the filter element; during the first stage flushing, the wastewater discharge branch is used to discharge the wastewater discharged from the wastewater outlet; the booster device 15 is located downstream of the second pure water reflux intersection B;

[0148] The raw water branch is provided with a pre-installed device 5, wherein the pre-installed device 5 is used to buffer the raw water of the raw water branch and / or the wastewater discharged back from the wastewater outlet;

[0149] The wastewater return branch and the wastewater discharge branch intersect at the first wastewater return intersection C, and the wastewater return branch and the raw water branch intersect at the second wastewater return intersection D; when performing the second stage of flushing, the wastewater return branch is used to return the wastewater discharged from the wastewater outlet to the pre-device 5, so as to push out the raw water cached in the pre-device 5 and mix it with the pure water returned by the pure water return branch to perform the second stage of flushing on the filter element; wherein, the pre-device 5 is located downstream of the second wastewater return intersection D and upstream of the second pure water return intersection B.

[0150] In an embodiment of the present invention, raw water flows from the water inlet through the pre-device 5 and enters the water production branch 1. The raw water is filtered by the filter element to produce pure water at the pure water outlet and waste water at the waste water outlet. The pure water is directly discharged from the pure water discharge branch for user use, and the waste water is directly discharged from the waste water discharge branch.

[0151] When the filter element is flushed in the first stage, the raw water input from the raw water branch can be buffered in the pre-device 5, and the pure water enters the pure water reflux branch from the pure water end. The pure water reflux valve assembly 2 controls all or part of the pure water to reflux to re-enter the water production branch 1 and flow to the filter element, thereby realizing the first stage of flushing of the filter element by pure water, or the first stage of flushing of the filter element by a mixture of pure water and raw water discharged from the pre-device. At the same time, the flushing wastewater generated in the first stage of flushing can be discharged through the wastewater discharge branch. In addition, when the filter element is flushed in the second stage, it is still necessary to control the pure water to enter the pure water reflux branch from the pure water end. At the same time, when the wastewater passes through the water quality detection device 4 at the wastewater outlet, the first adjustment parameter of the wastewater reflux branch is determined according to the real-time water quality value of the wastewater monitored by the water quality detection device 4. The first adjustment parameter is used to control the opening and closing degree of the wastewater reflux valve assembly 3, and control all or part of the wastewater to flow back to the pre-device, so as to push out the raw water buffered in the pre-device 4 and mix it with the pure water refluxed from the pure water reflux branch to perform the second stage of flushing the filter element, thereby realizing the double circulation of pure wastewater and flushing the filter element at the same time. In addition, it should be noted that the present invention does not limit the capacity of the pre-device. Preferably, the capacity of the pre-device is not fixed, but adjustable.

[0152] In addition, a pure water valve assembly 6 is provided on the pure water discharge branch, and a waste water valve assembly 7 is provided on the waste water discharge branch. During the first and second flushing processes described above, the pure water return valve assembly 2, the waste water return valve assembly 3, the pure water valve assembly 6, and the waste water valve assembly 7 are comprehensively adjusted to achieve a multi-stage flushing operation of the filter element. It should be noted that the aforementioned valve assemblies can be opened or closed, and the degree of opening (the degree of opening of the switch) can also be controlled, which is not limited in the present embodiment.

[0153] It can be seen that the water purifier described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation to effectively flush and produce water for the water purifier, significantly improve the intelligent control level of the water purifier, improve the flushing efficiency of the filter element, avoid excessively high concentrations of wastewater affecting the life of the membrane, increase the water production rate of the water purifier, improve the quality of drinking water, and avoid waste of water resources.

[0154] In an optional embodiment, if Figure 4 As shown, Figure 4 This is another schematic diagram of the structure of a water purifier disclosed in an embodiment of the present invention, such as Figure 4 As shown, the water quality detection device may include:

[0155] A first water quality detection device 4 provided at the wastewater outlet; or / and,

[0156] A second water quality detection device 8 provided on the wastewater return branch; or / and,

[0157] The third water quality detection device 9 is provided on the wastewater discharge branch.

[0158] In an embodiment of the present invention, a water quality detection device is provided on the branch connected to the wastewater outlet. The arrangement can be in various forms, and can be any combination of the above-mentioned first water quality detection device 4, the second water quality detection device 8, and the third water quality detection device 9, which is not limited in the embodiment of the present invention. For example, when the first wastewater return intersection C where the wastewater return branch intersects with the wastewater discharge branch is two wastewater outlets of the water production branch, then a water quality detection device can be provided on each of the wastewater return branch and the wastewater discharge branch; when the wastewater return branch and the wastewater discharge branch share a portion of the branch, then only one water quality detection device can be provided on the shared portion of the branch. The specific arrangement method is not limited in the embodiment of the present invention.

[0159] It can be seen that the water purifier described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation to effectively flush and produce water for the water purifier. At the same time, it can provide a variety of solutions for detecting wastewater quality and provide diversified wastewater detection device layout solutions to further refine the detection of wastewater quality in each wastewater branch, improve the control accuracy of wastewater reflux, and thereby improve the efficiency of filter element flushing and improve the water production rate of the water purifier.

[0160] In another optional embodiment, when the wastewater return branch and the wastewater discharge branch share part of the branch, a wastewater proportioning device 10 is also provided on the shared part of the branch. The wastewater proportioning device 10 is used to adjust the water ratio of the wastewater discharged from the wastewater outlet flowing into the wastewater return branch and the wastewater discharge branch respectively.

[0161] In an embodiment of the present invention, when the wastewater return branch and the wastewater discharge branch share a portion of the branch, in addition to being able to control the water volume ratio of the wastewater return through the wastewater return valve assembly 3, it can also be controlled by a wastewater proportioning device 10 provided on the branch shared by the wastewater return branch and the wastewater discharge branch. For example, the wastewater proportioning device 10 can be a three-way proportional valve assembly, one end of which is connected to the wastewater outlet of the water production branch, and the other two ends are respectively connected to the wastewater return branch and the wastewater discharge branch. The water flow rate is controlled by controlling the opening and closing degree of each port of the proportional valve assembly through voltage.

[0162] It can be seen that the water purifier described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism that combines pure water and wastewater circulation to effectively flush and produce water for the water purifier, and at the same time provide an optimal wastewater ratio control scheme to improve the convenience and response accuracy of the wastewater return ratio, which is conducive to improving the efficiency of filter element flushing and improving the water production rate of the water purifier.

[0163] In another optional embodiment, a fourth water quality detection device 13 is provided at the water inlet of the filter element of the water production branch, wherein the fourth water quality detection device 13 is used to detect the water quality of the water inlet of the filter element.

[0164] In an embodiment of the present invention, the fourth water quality detection device 13 can be specifically located downstream of the second pure water reflux intersection B and upstream of the filter element water inlet of the water production branch. The fourth water quality detection device 13 monitors the water quality of the refluxed pure water when the pre-installation device 5 does not discharge the buffer water and the pure water reflux branch refluxes pure water; it can also monitor the water quality of the mixed water of the discharged buffer water and pure water when the pre-installation device 5 discharges the buffer water and the pure water reflux branch refluxes pure water; it can also monitor the water quality of the buffer water discharged by the pre-installation device when the pre-installation device 5 discharges the buffer water and the pure water reflux does not reflux pure water, which is not limited by the embodiment of the present invention. In addition, the water quality detected by the fourth water quality detection device 13 can then be used to control the pure water reflux branch and the wastewater reflux branch according to the water quality of the mixed water, thereby achieving the flushing operation of the filter element or the mixed water production operation of the water production branch. For example, when it is determined that the water quality value detected by the fourth water quality detection device 13 exceeds a preset water quality threshold, it can be determined that the filter element meets the flushing condition.

[0165] Another improvement is that a fifth water quality detection device 14 is provided on the raw water branch. The fifth water quality detection device 14 is located downstream of the second wastewater backflow intersection D and upstream of the pre-device 5. The fifth water quality detection device 14 is used to detect the water quality of the mixed water formed by the wastewater discharged from the wastewater outlet and mixed with the raw water in the raw water branch after the wastewater is backflowed.

[0166] In the embodiment of the present invention, the fifth water quality detection device 14 can be used to monitor the water quality of the mixed water formed by the mixture of the refluxed wastewater and the raw water in the raw water branch. During the second stage of flushing or the process of using the mixed water for water production, the water quality of the mixed water can reflect to a certain extent the water quality of the wastewater outlet of the water production branch. When the raw water branch is also provided with a seventh water quality detection device 11, the water quality value of the wastewater outlet of the water production branch can be inferred based on the fifth water quality detection device 14 and the seventh water quality detection device 11. In addition, because the water quality of the mixed water can reflect to a certain extent the water quality of the wastewater outlet of the water production branch, with reference to the function of the water quality detection device 4, the entire water purifier can also be intelligently controlled based on the monitored water quality of the mixed water.

[0167] Another improvement is that a sixth water quality detection device 12 is installed on the pure water discharge branch. The sixth water quality detection device 12 is located between the pure water outlet and the pure water valve assembly 6. The sixth water quality detection device 12 is used to detect the water quality of the pure water discharged from the pure water outlet. By monitoring the water quality of the discharged pure water, the stability of the water output performance is guaranteed, and the control effect of the entire water purifier is provided in real time.

[0168] It can be seen that, referring to the description in Example 1 or Example 2, the water purifier described in the embodiment of the present invention can provide a multi-stage water circuit control mechanism combining pure water and wastewater circulation to effectively flush and produce water for the water purifier. It can also realize intelligent monitoring and control of the water purifier based on the water quality monitored by the sixth water quality detection device 12 and the water quality of the raw water in the raw water branch monitored by the seventh water quality detection device 11, thereby improving the intelligence level, further improving the refined control of filter element flushing, and improving the water production rate of the water purifier.

[0169] Example 4

[0170] See also Figure 5 , Figure 5 This is a schematic diagram of the structure of a water purifier control device disclosed in an embodiment of the present invention. Figure 5 The device described can be used in a water purifier. Figure 5 As shown, the water purifier control device may include:

[0171] A memory 401 storing executable program code;

[0172] a processor 402 coupled to the memory 401;

[0173] The processor 402 calls the executable program code stored in the memory 402 to execute part or all of the steps in the water purifier control method disclosed in the first or second embodiment of the present invention.

[0174] Example 5

[0175] An embodiment of the present invention discloses a computer storage medium, which stores computer instructions. When the computer instructions are called, they are used to execute the steps in the water purifier control method disclosed in the first or second embodiment of the present invention.

[0176] The device embodiments described above are merely illustrative, wherein the modules described as separate components may or may not be physically separate, and the components shown as modules may or may not be physical modules, i.e., they may be located in one place or distributed across multiple network modules. Some or all of the modules may be selected based on actual needs to achieve the objectives of the present embodiment. Those skilled in the art can understand and implement the present invention without inventive effort.

[0177] Through the detailed description of the above embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by means of software plus the necessary general hardware platform, or of course, by means of hardware. Based on this understanding, the above technical solution, in essence, or the portion that contributes to the prior art, can be embodied in the form of a software product, which can be stored in a computer-readable storage medium, including a read-only memory (ROM), a random access memory (RAM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), a one-time programmable read-only memory (OTPROM), an electronically erasable programmable read-only memory (EEPROM), a compact disc read-only memory (CD-ROM) or other optical disc storage, magnetic disk storage, magnetic tape storage, or any other computer-readable medium capable of carrying or storing data.

[0178] It should be noted that the computer program code required for the operation of each part of this specification can be written in any one or more programming languages, including object-oriented programming languages ​​such as Java, Scala, Smalltalk, Eiffel, JADE, Emerald, C++, C#, VB.NET, Python, etc., conventional procedural programming languages ​​such as C language, Visual Basic, Fortran2003, Perl, COBOL 2002, PHP, ABAP, dynamic programming languages ​​such as Python, Ruby and Groovy, or other programming languages. The program code can be run entirely on a computer (PC, embedded intelligent device, etc.), or as an independent software package on a user's computer, or partly on the user's computer and partly on a remote computer, or entirely on a remote computer or server. In the latter case, the remote computer can be connected to the user's computer through any network form, such as a local area network (LAN) or a wide area network (WAN), or connected to an external computer (e.g., via the Internet), or in a cloud computing environment, or used as a service such as software as a service (SaaS).

[0179] Finally, it should be noted that the water purifier and control method disclosed in the embodiments of the present invention are only preferred embodiments of the present invention, and are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A water purifier control method, wherein the water purifier includes a raw water branch, a production water branch, a wastewater discharge branch, and a pure water discharge branch, wherein the production water branch includes a filter element water inlet, a filter element, a pure water outlet, and a wastewater outlet, characterized in that: The water purifier further includes a pre-installation device, a pure water return branch, and a wastewater return branch. The raw water branch is provided with a booster device, the booster device is used to generate a water pressure difference, and the booster device is located downstream of the pre-installation device and upstream of the water production branch. The method includes: determining whether the filter element meets the flushing condition; when it is determined that the filter element meets the flushing condition, controlling the pure water reflux branch to perform a pure water reflux operation, wherein the pure water reflux operation is used to partially or completely reflux the pure water discharged from the pure water outlet to the boosting device and then input the pure water into the filter element inlet, so that the pure water is mixed with the raw water from the raw water branch to perform the first and second stages of flushing on the filter element; When performing the first stage of flushing, controlling the wastewater discharge branch to perform a wastewater discharge operation; During the second stage of flushing, a first adjustment parameter of the wastewater return branch is determined according to a preset control mode; and according to the first adjustment parameter of the wastewater return branch, the wastewater return branch is controlled to perform a first wastewater return operation, wherein the first wastewater return operation is used to control the wastewater discharged from the wastewater outlet to return to the pre-end device, so as to push out the raw water buffered in the pre-end device and mix it with the pure water returned by the pure water return branch to perform the second stage of flushing on the filter element; Among them, the first adjustment parameter is used to indicate the duration of controlling the wastewater discharged from the wastewater outlet to flow back to the pre-device in a matching proportion and the duration of controlling the total wastewater discharged from the wastewater outlet to flow back to the pre-device; or, the first adjustment parameter is: when the real-time water quality value of the wastewater outlet is less than the first flushing water quality threshold and greater than the second flushing water quality threshold, the adjustment parameter for controlling the wastewater discharged from the wastewater outlet to flow back to the pre-device in a matching proportion; when the real-time water quality value of the wastewater outlet is less than or equal to the second flushing water quality threshold, the adjustment parameter for controlling the total wastewater discharged from the wastewater outlet to flow back to the pre-device.

2. The water purifier control method according to claim 1, characterized in that: The method further comprises: During the first stage of flushing, determining whether the first stage of flushing is completed, and when it is determined that the first stage of flushing is completed, initiating the second stage of flushing; Wherein, determining whether the first stage of flushing is completed includes: determining whether the real-time water quality value of the wastewater outlet is less than or equal to a first water quality threshold, and when it is determined that the real-time water quality value of the wastewater outlet is less than or equal to the first water quality threshold, determining that the first stage of flushing has been completed; or It is determined whether the duration of the first stage flushing exceeds a first preset duration. When it is determined that the duration of the first stage flushing exceeds the first preset duration, it is determined that the first stage flushing is completed.

3. The water purifier control method according to claim 1 or 2, characterized in that: The method further comprises: When the second stage of flushing is being performed, it is determined whether the second stage of flushing is completed. When it is determined that the second stage of flushing is completed, the pure water reflux branch is controlled to perform a closing operation.

4. The water purifier control method according to claim 3, characterized in that: After controlling the pure water reflux branch to perform a closing operation, the method further includes: determining whether a water intake instruction is received, and when it is determined that the water intake instruction is received, controlling the raw water in the raw water branch to be mixed with the water buffered in the front device and to enter the water production branch to perform a water production operation; controlling the pure water discharge branch to perform a pure water discharge operation, and determining a second adjustment parameter of the wastewater return branch according to the preset control mode; According to the second adjustment parameter of the wastewater return branch, the wastewater return branch is controlled to perform a second wastewater return operation, and the second wastewater return operation is used to control the wastewater discharged from the wastewater outlet to return to the pre-device to mix with the raw water in the raw water branch and enter the pre-device.

5. The water purifier control method according to claim 4, characterized in that: The determining whether the second stage of flushing is completed includes: determining whether the real-time water quality value of the wastewater outlet is less than or equal to a second water quality threshold, and when it is determined that the real-time water quality value of the wastewater outlet is less than or equal to the second water quality threshold, determining that the second stage of flushing has been completed; or Determine whether the water quality value of the mixed water formed by the wastewater discharged from the wastewater outlet and mixing with the raw water in the raw water branch is less than or equal to the third water quality threshold. When it is determined that the water quality value of the mixed water is less than or equal to the third water quality threshold, it is determined that the second stage of flushing has been completed.

6. The water purifier control method according to claim 4 or 5, characterized in that: The determining, according to the preset control mode, a second adjustment parameter of the wastewater return branch includes: Determining whether the preset control mode is a time mode, and when it is determined that the preset control mode is the time mode, determining a second adjustment parameter of the wastewater return branch according to the preset control mode, the second adjustment parameter including a duration for controlling the proportional return of wastewater in the wastewater return branch; determining whether the preset control mode is a water quality mode, and when it is determined that the control mode is the water quality mode, determining a second adjustment parameter of the wastewater return branch according to a real-time water quality value of the wastewater outlet when the water production branch is producing water; The method of determining the second adjustment parameter of the wastewater return branch according to the real-time water quality value of the wastewater outlet when the water production branch produces water includes: Determine the relationship between the real-time water quality value of the wastewater outlet and a first water quality threshold and a second water quality threshold when the water production branch performs a water production operation; wherein the first water quality threshold is less than the second water quality threshold; When it is determined that the real-time water quality value of the wastewater outlet is less than the second water quality threshold, determining the wastewater return ratio of the wastewater return branch according to the relationship between the real-time water quality value and the first water quality threshold and the second water quality threshold; A second adjustment parameter of the wastewater return branch is generated according to the wastewater return ratio.

7. The water purifier control method according to claim 1, characterized in that: The determining whether the filter element meets the flushing condition includes: Determine whether the first water quality value of the wastewater outlet exceeds a fourth water quality threshold, and when it is determined that the first water quality value exceeds the fourth water quality threshold, determine that the filter element meets the flushing condition; or, Determine whether the second water quality value at the water inlet of the filter element exceeds a fifth water quality threshold value, and when it is determined that the second water quality value exceeds the fifth water quality threshold value, determine that the filter element meets the flushing condition; or, Determine whether the time difference between the current time point and the time point at which the water production branch was last flushed exceeds a second preset time length. When it is determined that the time difference between the current time point and the time point at which the water production branch was last flushed exceeds the second preset time length, determine that the filter element meets the flushing condition; or Determine whether the operating time of the water production branch exceeds a third preset time. When it is determined that the operating time of the water production branch exceeds the third preset time, determine that the filter element meets the flushing condition, wherein the operating time includes a single water production operating time or the total duration of the most recent N water production operating times; or Determine whether the water production volume of the water production branch exceeds a preset water volume. When it is determined that the water production volume of the water production branch exceeds the preset water volume, determine that the filter element meets the flushing condition, wherein the water production volume includes a single water production volume or the sum of the water volumes of the most recent N water productions; or Determine whether the third water quality value of the pure water outlet exceeds a sixth water quality threshold, and when it is determined that the third water quality value of the pure water outlet exceeds the sixth water quality threshold, determine that the filter element meets the flushing condition; or, Determine whether the water production times of the water production branch exceed the preset water production times. When it is determined that the water production times of the water production branch exceed the preset water production times, determine that the filter element meets the flushing conditions, wherein the water production times include the sum of the water production times between the current time point and the time point when the most recent flushing of the water production branch is completed or the total water production times within the water production life cycle of the water production branch.

8. A water purifier, the water purifier being used to execute the water purifier control method according to any one of claims 1 to 7, and the water purifier comprising a water production branch, the water production branch comprising a filter element water inlet, a filter element, a pure water outlet and a wastewater outlet, the filter element water inlet being connected to a raw water branch, the pure water outlet being connected to a pure water discharge branch, and the wastewater outlet being connected to a wastewater discharge branch, characterized in that: The water purifier also includes: The raw water branch is provided with a pressure boosting device, which is used to generate a water pressure difference and is located upstream of the produced water branch; A pure water reflux branch, wherein the pure water reflux branch and the pure water discharge branch intersect at a first pure water reflux intersection, and the pure water reflux branch and the raw water branch intersect at a second pure water reflux intersection; when it is determined that the filter element meets the flushing conditions, the pure water reflux branch is used to return part or all of the pure water discharged from the pure water outlet to the boosting device and then input it into the filter element water inlet, so that it is mixed with the raw water in the raw water branch to perform the first and second stage flushing of the filter element; when the first stage flushing is performed, the wastewater discharge branch is used to discharge the wastewater discharged from the wastewater outlet; the boosting device is located downstream of the second pure water reflux intersection; The raw water branch is provided with a pre-processing device, which is used to buffer the raw water of the raw water branch and / or the wastewater discharged back from the wastewater outlet; The wastewater return branch intersects with the wastewater discharge branch at a first wastewater return intersection, and the wastewater return branch intersects with the raw water branch at a second wastewater return intersection; when performing the second stage of flushing, the wastewater return branch is used to return the wastewater discharged from the wastewater outlet to the pre-device, so as to push out the raw water buffered in the pre-device and mix it with the pure water returned by the pure water return branch to perform the second stage of flushing on the filter element; wherein, the pre-device is located downstream of the second wastewater return intersection and upstream of the second pure water return intersection.

9. The water purifier according to claim 8, characterized in that: The pure water reflux branch is provided with a pure water reflux valve assembly; the waste water reflux branch is provided with a waste water reflux valve assembly; the pure water discharge branch is provided with a pure water valve assembly; the waste water discharge branch is provided with a waste water valve assembly.

10. The water purifier according to claim 8, characterized in that: The water purifier also includes: A water quality detection device is provided on the branch line connected to the wastewater outlet, and the water quality detection device is used to monitor the real-time water quality value of the wastewater outlet; Wherein, the water quality detection device includes: A first water quality detection device provided at the wastewater outlet; or / and, A second water quality detection device provided on the wastewater return branch; or / and, A third water quality detection device is provided on the wastewater discharge branch.

11. The water purifier according to claim 9, characterized in that: When the wastewater return branch and the wastewater discharge branch share part of the branch, a wastewater proportioning device is provided on the branch shared by the wastewater return branch and the wastewater discharge branch, and the wastewater proportioning device is used to adjust the water volume ratio of the wastewater discharged from the wastewater outlet flowing into the wastewater return branch and the wastewater discharge branch respectively.

12. The water purifier according to claim 10, characterized in that: A fourth water quality detection device is provided at the water inlet of the filter element of the water production branch, and the fourth water quality detection device is used to detect the water quality of the water inlet of the filter element.

13. The water purifier according to any one of claims 9 to 11, characterized in that: A fifth water quality detection device is provided on the raw water branch, and the fifth water quality detection device is located downstream of the second wastewater backflow intersection and upstream of the pre-device. The fifth water quality detection device is used to detect the water quality of the mixed water formed by the wastewater discharged from the wastewater outlet and mixed with the raw water in the raw water branch after the wastewater is backflowed.

14. The water purifier according to claim 12, characterized in that: A sixth water quality detection device is provided on the pure water discharge branch, and the sixth water quality detection device is located between the pure water outlet and the pure water valve assembly. The sixth water quality detection device is used to detect the water quality of the pure water discharged from the pure water outlet.

15. The water purifier according to claim 13, characterized in that: The raw water branch is also provided with a seventh water quality detection device, which is located upstream of the second wastewater backflow intersection and is used to detect the water quality of the raw water in the raw water branch.

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