CN115991519B

CN115991519B - Water purifier and control method

Info

Publication number: CN115991519B
Application number: CN202111215300.8A
Authority: CN
Inventors: 陈小平; 李大川; 李中扬; 吕苏; 晏博; 董红晨
Original assignee: Foshan Viomi Electrical Technology Co Ltd
Current assignee: Foshan Viomi Electrical Technology Co Ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2024-04-12
Anticipated expiration: 2041-10-19
Also published as: CN115991519A

Abstract

The invention discloses a water purifier and a control method, wherein the water purifier comprises a supercharging device, a water producing branch, a pure water backflow branch and a waste water backflow branch, wherein the water producing branch comprises a filter element water inlet, a filter element, a pure water outlet and a waste water outlet; when the filter element meets the flushing condition, controlling pure water to flow back to the supercharging device to flow back to the water producing branch; according to a preset control mode, determining an adjustment parameter of a target wastewater branch; according to the adjustment parameters, controlling the target waste water branch to execute corresponding adjustment operation so as to flush the filter element; when the target waste water branch comprises a waste water backflow branch, the adjustment parameters are used for controlling the waste water backflow branch to execute closing operation or execute first waste water backflow operation, and the first waste water backflow operation is used for backflow of waste water discharged from the waste water outlet to the water inlet of the input filter element of the supercharging device. Therefore, the invention can improve the flushing efficiency of the filter element, improve the water yield of the water purifier and avoid the waste of water resources.

Description

Water purifier and control method

Technical Field

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

Background

With the rapid development of water purification technology, water purifiers which filter through devices such as reverse osmosis pressure membranes and the like are becoming popular, but concentrated wastewater stays in the reverse osmosis membrane device all the time after long-time use, so that salt or other soluble solids are attached to the reverse osmosis pressure membranes, and the service life of the reverse osmosis pressure membranes is reduced. Therefore, the water purifier needs to be frequently washed.

In the practical application process, the wastewater side of the reverse osmosis pressure membrane is usually washed by filtered water or raw water and the washed water is directly discharged. However, the flushing method can lead to the water purifier to discharge more wastewater in the flushing process, thereby reducing the water production efficiency of the water purifier and wasting water resources.

Therefore, it is important to provide a water purifier and a control method for improving the washing and water producing efficiency.

Disclosure of Invention

The invention provides a water purifier and a control method, which can provide a pure water and wastewater double-circulation waterway control mechanism, improve the flushing efficiency of a filter element, prevent the service life of a membrane from being influenced by excessive high-concentration wastewater, improve the water yield of the water purifier, improve the quality of drinking water, avoid the waste of water resources, and facilitate the improvement of the use experience of users and the improvement of the viscosity of the users.

In order to solve the above technical problems, a first aspect of the present invention discloses a control method of a water purifier, the water purifier includes a raw water branch, a water producing branch, a waste water discharging branch and a pure water discharging branch, the water producing branch includes a filter element water inlet, a filter element, a pure water outlet and a waste water outlet, the water purifier is characterized in that the water purifier further includes a pure water reflux branch and a waste water reflux branch, a supercharging device is arranged on the raw water branch, the supercharging device is used for producing a water pressure difference, the supercharging device is located at an upstream of the water producing branch, the method includes:

judging whether the filter element meets the flushing condition, and controlling the pure water backflow branch to execute pure water backflow operation when judging that the filter element meets the flushing condition, wherein the pure water backflow operation is used for partially or completely backflow pure water discharged from the pure water outlet to the supercharging device and then inputting the pure water into the water inlet of the filter element;

determining adjustment parameters of a target wastewater branch according to a preset control mode, wherein the target wastewater branch comprises the wastewater discharge branch and/or the wastewater reflux branch;

according to the adjustment parameters of the target waste water branch, controlling the target waste water branch to execute corresponding adjustment operation so as to flush the filter element; when the target waste water branch comprises the waste water backflow branch, the adjusting parameters of the target waste water branch are used for controlling the waste water backflow branch to execute closing operation or execute first waste water backflow operation, and the first waste water backflow operation is used for backflow of waste water discharged from the waste water outlet to the supercharging device and then inputting the waste water into the filter element water inlet;

When the adjustment parameters of the target wastewater branch are used for controlling the wastewater reflux branch to execute closing operation, controlling the pure water reflux branch to execute the pure water reflux operation and the flushing operation of the filter element;

when the adjustment parameters of the target wastewater branch are used for controlling the wastewater reflux branch to execute the first wastewater reflux operation, controlling the pure water reflux branch to execute pure water refluxed by the pure water reflux operation and controlling the wastewater reflux branch to execute the wastewater refluxed by the first wastewater reflux operation to execute the flushing operation on the filter element.

As an optional implementation manner, in the first aspect of the present invention, determining whether the filter element meets a flushing condition includes:

judging whether a first water quality value of the wastewater outlet exceeds a first preset threshold value, and judging that the filter element meets a flushing condition when judging that the first water quality value exceeds the first preset threshold value; or,

judging whether a second water quality value of a water inlet of the filter element exceeds a second preset threshold value, and judging that the filter element meets a flushing condition when judging that the second water quality value exceeds the second preset threshold value; or,

Judging whether the time difference between the current time point and the time point of the last flushing of the water producing branch exceeds a first preset duration, and judging that the filter element meets a flushing condition when the time difference between the current time point and the time point of the last flushing of the water producing branch exceeds the first preset duration; or,

judging whether the working time length of the water producing branch circuit exceeds a second preset time length, and judging that the filter element meets a flushing condition when judging that the working time length of the water producing branch circuit exceeds the second preset time length, wherein the working time length comprises the total time length of single water producing working time length or the latest N water producing working time lengths; or,

judging whether the water production amount of the water producing branch exceeds a preset water amount, and judging that the filter element meets a flushing condition when judging that the water production amount of the water producing branch exceeds the preset water amount, wherein the water production amount comprises the water production amount of a single time or the total water production amount of the latest N times; or,

judging whether the third water quality value of the pure water outlet exceeds a third preset threshold value, and judging that the filter element meets the flushing condition when judging that the third water quality value of the pure water outlet exceeds the third preset threshold value; or,

Judging whether the water production times of the water production branch circuit exceeds preset water production times, and judging that the filter element meets the flushing condition when judging that the water production times of the water production branch circuit exceeds the preset water production times, wherein the water production times comprise the sum of the water production times between the current time point and the time point when the last flushing of the water production branch circuit is finished or the total water production times in the water production life cycle of the water production branch circuit.

As an optional implementation manner, in the first aspect of the present invention, the determining, according to a preset control mode, an adjustment parameter of the target wastewater leg includes:

according to a preset control mode, determining adjustment parameters of a target wastewater branch, wherein the adjustment parameters comprise a first adjustment duration, a second adjustment duration and a third adjustment duration;

the first adjustment duration is used for indicating duration for controlling the waste water backflow branch to execute closing operation;

the second adjustment duration is used for indicating duration of controlling the waste water backflow branch to execute the first waste water backflow operation to backflow the waste water discharged from the waste water outlet to the supercharging device according to the matched proportion and then inputting the waste water into the water inlet of the filter element;

The third control duration is used for controlling the waste water backflow branch to backflow all waste water discharged from the waste water outlet to the supercharging device and inputting the waste water into the water inlet of the filter element.

judging the magnitude relation between the first real-time water quality value of the wastewater outlet and the first flushing water quality threshold value and the second flushing water quality threshold value according to a preset control mode; wherein the first flush water quality threshold is less than the second flush water quality threshold;

when the first real-time water quality value is larger than or equal to the second flushing water quality threshold value, determining that a target wastewater branch at least comprises the wastewater backflow branch and determining the adjustment parameters of the target wastewater branch, wherein the adjustment parameters of the target wastewater branch are at least used for controlling the wastewater backflow branch to execute closing operation;

when the first real-time water quality value is judged to be smaller than the second flushing water quality threshold and larger than the first flushing water quality threshold, determining that the target wastewater branch at least comprises the wastewater reflux branch and determining the adjustment parameter of the target wastewater branch, wherein the adjustment parameter of the target wastewater branch is used for controlling the wastewater reflux branch to execute the first wastewater reflux operation, and the first wastewater reflux operation is specifically used for refluxing wastewater discharged from the wastewater outlet to the supercharging device according to a matched proportion and then inputting the wastewater into the water inlet of the filter element;

When the first real-time water quality value is smaller than or equal to the first flushing water quality threshold value, determining that the target waste water branch at least comprises the waste water backflow branch and determining an adjustment parameter of the target waste water branch, wherein the adjustment parameter is specifically used for controlling the waste water backflow branch to backflow all waste water discharged from the waste water outlet to the supercharging device and then inputting the waste water into the filter element water inlet.

As an optional implementation manner, in the first aspect of the present invention, after the controlling the target waste water branch to perform the corresponding adjustment operation according to the adjustment parameter of the target waste water branch to flush the filter element, the method further includes:

judging whether the filter element meets the flushing end condition, and controlling the pure water backflow branch to execute closing operation when judging that the filter element meets the flushing end condition.

In an optional implementation manner, in the first aspect of the present invention, the determining whether the filter element meets a flushing end condition includes:

judging whether a first real-time water quality value of the wastewater outlet is smaller than or equal to a first end flushing threshold value, and judging that the filter element meets a flushing end condition when the first water quality value is smaller than or equal to the first end flushing threshold value; or,

Judging whether a second real-time water quality value of a water inlet of the filter element of the water producing branch is smaller than or equal to a second end flushing threshold value, and judging that the filter element meets a flushing end condition when the second real-time water quality value is smaller than or equal to the second end flushing threshold value.

As an optional implementation manner, in the first aspect of the present invention, after the controlling the pure water reflux branch to perform the closing operation, the method further includes:

judging whether a water taking instruction is received or not, and determining an adjustment parameter of the wastewater reflux branch according to a first real-time water quality value of the wastewater outlet when the water producing branch produces water when the water taking instruction is judged to be received;

and controlling the waste water reflux branch to execute corresponding adjustment operation according to the adjustment parameters of the waste water reflux branch so as to mix the waste water discharged by the waste water outlet with the raw water in the raw water branch and then input the mixed waste water into the water production branch for mixing and producing water.

In an optional implementation manner, in the first aspect of the present invention, the determining, according to the first real-time water quality value of the waste water outlet when the water producing branch produces water, an adjustment parameter of the waste water return branch includes:

Judging the magnitude relation between a first real-time water quality value of the wastewater outlet, a first water quality threshold value and a second water quality threshold value when the water producing branch is used for mixing water; wherein the first water quality threshold is less than the second water quality threshold;

determining an adjustment parameter of the wastewater reflux branch according to the magnitude relation between the first real-time water quality value of the wastewater outlet, the first water quality threshold value and the second water quality threshold value when the water production branch carries out mixed water production; the adjusting parameters of the waste water backflow branch are used for controlling the waste water backflow branch to execute second waste water backflow operation, and the second waste water backflow operation is particularly used for backflow of waste water discharged from the waste water outlet to the filter element water inlet when the water production branch is used for mixing water for making water.

The second aspect of the invention discloses a water purifier, the water purifier comprises a water producing branch, the water producing branch comprises a filter element water inlet, a filter element, a pure water outlet and a waste water outlet, the filter element water inlet is connected with a raw water branch, the pure water outlet is connected with a pure water discharging branch, and the waste water outlet is connected with a waste water discharging branch, the water purifier is characterized by further comprising:

The raw water branch is provided with a pressurizing device which is used for generating water pressure difference, and the pressurizing device is positioned at the upstream of the water producing branch;

the pure water backflow branch is provided with a pure water backflow valve assembly, the pure water backflow branch is used for communicating the pure water outlet with the raw water branch, and the pure water backflow valve assembly is used for controlling whether pure water discharged from the pure water outlet flows back to the water inlet of the filter element or not; the pure water reflux branch and the pure water discharge branch are intersected at a first pure water reflux intersection point, and the pure water reflux branch and the raw water branch are intersected at a second pure water reflux intersection point; the second pure water reflux cross point is positioned at the upstream of the pressurizing device;

the waste water backflow branch is provided with a waste water backflow valve assembly, the waste water backflow branch is used for communicating the waste water outlet with the raw water branch, and the waste water backflow valve assembly is used for controlling whether waste water discharged from the waste water outlet flows back to the water inlet of the filter element or not; the waste water reflux branch and the waste water discharge branch are intersected at a first waste water reflux intersection point, and the waste water reflux branch and the raw water branch are intersected at a second waste water reflux intersection point; the second pure water reflux crossover point is located upstream of the pressurizing device.

As an alternative embodiment, in the second aspect of the present invention, the pure water valve assembly is provided on the pure water discharge branch; and a wastewater valve assembly is arranged on the wastewater discharge branch.

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

a water quality detection device is arranged on a branch communicated with the wastewater outlet and is used for monitoring the real-time water quality value of the wastewater outlet;

wherein, water quality testing device includes:

the first water quality detection device is arranged at the wastewater outlet; or/and the combination of the two,

the second water quality detection device is arranged on the waste water return branch; or/and the combination of the two,

and a third water quality detection device arranged on the waste water discharge branch.

In a second aspect of the present invention, when the waste water recirculation branch and the waste water discharge branch share a part of the branch, waste water proportioning means are provided on the branch shared by the waste water recirculation branch and the waste water discharge branch, the waste water proportioning means being used for adjusting the water volume proportions of the waste water discharged from the waste water outlet flowing into the waste water recirculation branch and the waste water discharge branch, respectively.

In a second aspect of the present invention, a fourth water quality detection device is disposed on the raw water branch, the fourth water quality detection device is located downstream of the second pure water backflow cross point and the second waste water backflow cross point and upstream of the water inlet of the filter element, and the fourth water quality detection device is used for detecting the water quality condition of mixed water formed by mixing pure water flowing back from the pure water backflow branch with waste water flowing back from the waste water backflow branch.

In a second aspect of the present invention, a fifth water quality detecting device is provided on the pure water discharge branch, the fifth water quality detecting device being located between the pure water outlet and the pure water valve assembly, the fifth water quality detecting device being configured to detect a water quality condition of pure water discharged from the pure water outlet.

In a second aspect of the present invention, a sixth water quality detection device is further provided on the raw water branch, the sixth water quality detection device being located upstream of the second pure water backflow intersection and the second wastewater backflow intersection, the sixth water quality detection device being configured to detect the water quality of raw water.

The third aspect of the present invention discloses a control device for a water purifier, the device comprising:

a memory storing executable program code;

a processor coupled to the memory;

the processor invokes the executable program code stored in the memory to perform part or all of the steps in any one of the water purifier control methods disclosed in the first aspect of the present invention.

A fourth aspect of the present invention discloses a computer storage medium storing computer instructions for executing part or all of the steps of any one of the water purifier control methods disclosed in the first aspect of the present invention when the computer instructions are called.

Compared with the prior art, the invention has the following beneficial effects:

in the invention, the water purifier comprises a water producing branch, a pure water reflux branch and a waste water reflux branch, wherein the water producing branch comprises a filter element water inlet, a filter element, a pure water outlet and a waste water outlet; when the filter element meets the flushing condition, controlling pure water to flow back to the water producing branch by controlling the pure water to flow back to part or all of the pure water; determining an adjustment parameter of a target wastewater branch according to the first real-time water quality value of the wastewater outlet; according to the adjustment parameters, controlling the target waste water branch to execute corresponding adjustment operation so as to flush the filter element; when the target waste water branch comprises a waste water backflow branch, the adjustment parameters are used for controlling the waste water backflow branch to execute closing operation or execute first waste water backflow operation, and the first waste water backflow operation is used for backflow of waste water discharged from the waste water outlet to the water inlet of the filter element. Therefore, the invention can provide a pure water and wastewater double-circulation waterway control mechanism, which improves the flushing efficiency of the filter element, avoids the influence of the wastewater with too high concentration on the service life of the membrane, improves the water yield of the water purifier, improves the quality of drinking water and avoids the waste of water resources.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic flow chart of a control method of a water purifier according to an embodiment of the present invention;

FIG. 2 is a schematic flow chart of another control method of a water purifier according to an embodiment of the present invention;

fig. 3 is a schematic structural view of a water purifier according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of another water purifier according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a control device for a water purifier according to an embodiment of the present invention.

The reference numerals in the drawings represent the following meanings: a water producing branch 1; a pure water return valve assembly 2; a waste water return valve assembly 3; a first water quality detection device 4; a pure water valve assembly 5; a waste water valve assembly 6; a second water quality detection device 7; a third water quality detection device 8; a waste water proportioning device 9; a fourth water quality detection device 10; a fifth water quality detecting device 11; a sixth water quality detection device 12; a supercharging device 13; a first pure water reflux cross point A; a second pure water reflux cross point B; a first wastewater reflux crossover point C; and the second wastewater flows back to the cross point D.

Detailed Description

In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between different objects and not necessarily for describing a sequential or chronological order. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, apparatus, article, or article that comprises a list of steps or elements is not limited to only those listed but may optionally include other steps or elements not listed or inherent to such process, method, article, or article.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the invention. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

The invention discloses a water purifier and a control method, which can provide a pure water and wastewater double-circulation waterway control mechanism, improve the flushing efficiency of a filter element, prevent the service life of a membrane from being influenced by excessive high-concentration wastewater, improve the water yield of the water purifier, improve the quality of drinking water, avoid the waste of water resources, and facilitate the improvement of the use experience of users and the improvement of the viscosity of users. In addition, one or more embodiments of the present invention may be applied to any water purification system, such as a household water purifier, a commercial water purifier, a water purifier for a water purification plant, etc., and the embodiments of the present invention are not limited thereto.

Example 1

Referring to fig. 1, fig. 1 is a flow chart of a control method of a water purifier according to an embodiment of the invention. As shown in fig. 1, the water purifier control method may include the following operations:

101. Judging whether the filter element meets the flushing condition.

In the embodiment of the invention, the water purifier comprises a raw water branch, a water producing branch, a waste water discharging branch and a pure water discharging branch, wherein the water producing branch comprises a filter element water inlet, a filter element, a pure water outlet and a waste water outlet, the water purifier also comprises a pure water reflux branch and a waste water reflux branch, the raw water branch is provided with a supercharging device for generating water pressure difference, the supercharging device can be used for enabling the supercharged water to permeate through the filter element and can also be used for controlling the backflow of the water in the pure water reflux branch and the waste water reflux branch, and the supercharging device is positioned at the upstream of the water producing branch. Raw water flows through the raw water branch and is pressurized by the pressurizing device, and then is input into a water inlet of a filter element of the water producing branch, and the raw water is filtered into pure water and waste water by the filter element of the water producing branch; the waste water can be input into the water producing branch after flowing back to the supercharging device through the waste water backflow branch, and can be discharged through the waste water discharge branch. The method of the invention needs to judge whether the filter element meets the flushing condition or not, and the flushing operation is started when the flushing condition is met. For example, after a user accumulates a certain volume of water, the flushing operation is started by detecting a change in TDS at the wastewater outlet to a certain value.

102. And when the filter element is judged to meet the flushing condition, controlling the pure water backflow branch to execute pure water backflow operation.

In the embodiment of the invention, when the filter element is judged to meet the flushing condition, pure water is controlled to flow back to the supercharging device along the pure water backflow branch and then is input to the filter element water inlet of the water production branch so as to flush the filter element, namely, the pure water backflow branch is controlled to execute pure water backflow operation. At this time, only pure water or the mixed water of pure water and raw water is input to the water inlet of the filter element of the water producing branch, the TDS value of the input water is obviously very small, and a better flushing effect can be achieved on the filter element. The pure water may be partially or entirely refluxed, and the embodiment of the present invention is not limited thereto. For example, the operation of controlling whether the pure water is refluxed or not and the flow control of the pure water reflux may be performed by controlling the valve assembly on the pure water reflux branch by the controller. In addition, the control mode of the pure water backflow operation can be controlled according to time or according to the water quality value in the waterway system. For example, the duration of the pure water circuit operation may be set to 10 seconds, and the operation may be stopped after the execution of 10 seconds is completed.

103. According to a preset control mode, determining an adjustment parameter of a target wastewater branch; and according to the adjustment parameters of the target waste water branch, controlling the target waste water branch to execute corresponding adjustment operation so as to flush the filter element.

In the embodiment of the invention, in the flushing process, besides the pure water backflow flushing operation in the step 102, the filter element flushing can be performed in combination with the waste water backflow operation in the step 103. The preset control mode may be a time mode, a water quality module, a mixture of a time mode and a water quality mode, or the like, and the embodiment of the invention is not limited.

The time mode can be used for finally achieving the water taking purpose of a user by presetting the working time of each control stage of the water purifier and controlling the starting time and the ending time of the working of each stage. Specifically, determining adjustment parameters of a target wastewater branch, wherein the adjustment parameters comprise a first adjustment duration, a second adjustment duration and a third adjustment duration; the first adjustment time length is used for indicating the duration time length for controlling the waste water backflow branch to execute the closing operation; the second adjustment time length is used for indicating the duration time length of controlling the waste water backflow branch to execute the first waste water backflow operation to backflow the waste water discharged from the waste water outlet to the water inlet of the filter element after the waste water is returned to the supercharging device according to the matched proportion; the third control duration is used for controlling the duration of the waste water backflow branch to backflow all waste water discharged from the waste water outlet to the water inlet of the filter element after the waste water backflow branch is controlled to flow back to the supercharging device. For example, the first adjustment time length, the second adjustment time length and the third adjustment time length are respectively 10 seconds, 20 seconds and 30 seconds, so that pure water or/and raw water flushing for 10 seconds, double-circulation flushing for 20 seconds (the proportion of waste water backflow in the flushing process gradually changes from 0% to 100%) and waste water flushing for 30 seconds can be realized, and the whole flushing operation is realized.

The water quality mode may be used to monitor a first real-time water quality value (such as TDS, alkalinity, hardness, etc. in the embodiment of the present invention) of the water producing branch at the waste water outlet in the process of flushing the filter element, and further determine an adjustment parameter of the target waste water branch according to the first real-time water quality value, where the target waste water branch may include a waste water discharge branch and/or a waste water backflow branch, that is, determine adjustment parameters corresponding to the waste water discharge branch and/or the waste water backflow branch respectively to control whether waste water flows back and the flow of waste water back, so as to flush the filter element.

In the embodiment of the invention, when the target wastewater branch only comprises the wastewater discharge branch, the adjustment parameters of the target wastewater branch are only used for controlling the wastewater discharge branch to execute the closing or opening operation, at the moment, the control operation of the wastewater reflux branch is not performed, and at the moment, the flushing of the filter element is only performed by pure water reflux flushing in the step 102.

In the embodiment of the invention, when the target wastewater branch comprises a wastewater discharge branch and a wastewater reflux branch, the adjustment parameters of the target wastewater branch are used for controlling the wastewater discharge branch to execute the closing or opening operation and controlling the wastewater reflux branch to execute the closing operation or execute the first wastewater reflux operation, wherein the first wastewater reflux operation controls the wastewater discharged from the wastewater outlet of the water production branch in the flushing process to be input into the water inlet of the filter element of the water production branch along the wastewater reflux branch in a reflux manner so as to flush the filter element. In the embodiment of the invention, when the adjustment parameter of the target wastewater branch is used for controlling the wastewater reflux branch to execute the closing operation, the filter element can be flushed only by controlling the pure water refluxed by the pure water reflux branch to execute the pure water reflux operation, namely, the flushing of the filter element is only the pure water reflux flushing in the step 102. In the embodiment of the invention, when the adjustment parameter of the target wastewater branch is used for controlling the wastewater reflux branch to execute the first wastewater reflux operation, controlling the pure water reflux branch to execute pure water refluxed by the pure water reflux operation and the wastewater refluxed by the wastewater reflux branch to execute the flushing operation of the filter element, namely the flushing operation of the filter element is the flushing operation of the double loop circulation of the pure water reflux circulation and the wastewater reflux circulation.

In the embodiment of the present invention, the steps 102 and 103 are not sequentially executed, and the step 102 may be executed first and then the step 103 may be executed first, and then the step 102 may be executed first and then the step 103 may be executed, and further the step 102 and the step 103 may be executed simultaneously.

Therefore, the method described by the embodiment of the invention can provide a pure water and wastewater double-circulation waterway control mechanism, improves the flushing efficiency of the filter element, avoids the influence of excessive high-concentration wastewater on the service life of the membrane, improves the water yield of the water purifier, improves the quality of drinking water, avoids the waste of water resources, is beneficial to improving the use experience of users, and improves the viscosity of the users.

In an alternative embodiment, determining whether the filter element meets the flush condition may further comprise the operations of:

judging whether the first water quality value of the wastewater outlet exceeds a first preset threshold value, and judging that the filter element meets the flushing condition when judging that the first water quality value exceeds the first preset threshold value; or,

judging whether the time difference between the current time point and the time point when the water producing branch is finished in the last flushing exceeds a first preset duration, and judging that the filter element meets the flushing condition when the time difference between the current time point and the time point when the water producing branch is finished in the last flushing exceeds the first preset duration; or,

Judging whether the working time length of the water producing branch exceeds a second preset time length, and judging that the filter element meets the flushing condition when the working time length of the water producing branch exceeds the second preset time length, wherein the working time length comprises the total time length of single water producing working time length or the latest N water producing working time lengths; or,

judging whether the water production amount of the water producing branch exceeds a preset water amount, and judging that the filter element meets a flushing condition when judging that the water production amount of the water producing branch exceeds the preset water amount, wherein the water production amount comprises the water production amount of single time or the water production amount sum of the latest N times; or,

In the embodiment of the invention, whether the filter element meets the flushing condition can be judged by monitoring whether the water quality value at the wastewater outlet of the water producing branch exceeds the preset threshold value, and when the water quality value at the wastewater outlet is obviously higher than the preset threshold value, the higher salinity level in the filter element is indicated, and flushing is needed. When the waste water reflux circulation is started, whether the filter element meets the flushing condition can be judged by monitoring whether the water quality value of mixed water output from the water inlet of the filter element of the water production branch exceeds a preset threshold, and when the water quality value of the mixed water is higher than the preset threshold, the condition that the salinity level in the refluxed waste water is higher is indicated, and the filter element needs to be flushed. Whether the filter element needs to be washed or not can be judged by judging whether the time difference between the current time point and the time point when the last washing of the water producing branch is finished exceeds the preset time length, the preset time length can be set according to the historical washing time and frequency, and the timing washing can be formed. Considering the actual use condition of the filter element, the filter element can also be judged by judging whether the working time length of the water producing branch exceeds the preset time length, or whether the water producing amount of the water producing branch exceeds the preset water amount, or whether the water producing times of the water producing branch exceeds the preset times. In addition, can also judge through monitoring whether the water quality value of the pure water outlet of producing the water branch road exceeds the threshold value of predetermineeing, when the water quality value of pure water outlet exceeded the threshold value of predetermineeing, indicate that accumulated salt of certain degree in the filter core leads to salt reverse osmosis to the pure water in so that pure water quality of water worsens, need wash the filter core.

Therefore, the method described by the embodiment of the invention can provide a method for detecting whether the filter element meets the flushing condition or not while flushing the filter element by using a pure water and waste water double-circulation waterway control mechanism, and can monitor the service condition of the filter element more accurately so as to realize accurate flushing of the filter element, avoid unnecessary flushing operation, further improve the flushing effect of the filter element and improve the water yield of the water purifier.

In another alternative embodiment, determining the adjustment parameter of the target wastewater leg based on the first real-time water quality value of the wastewater outlet may include the operations of:

judging the size relation between the first real-time water quality value of the wastewater outlet and the first flushing water quality threshold value and the second flushing water quality threshold value; wherein the first flush water quality threshold is less than the second flush water quality threshold;

when the first real-time water quality value is larger than or equal to the second flushing water quality threshold value, determining that the target wastewater branch at least comprises a wastewater backflow branch and determining the adjustment parameters of the target wastewater branch, wherein the adjustment parameters of the target wastewater branch are at least used for controlling the wastewater backflow branch to execute closing operation;

when the first real-time water quality value is judged to be smaller than the second flushing water quality threshold value and larger than the first flushing water quality threshold value, determining that the target wastewater branch at least comprises a wastewater backflow branch and determining the adjustment parameters of the target wastewater branch, wherein the adjustment parameters of the target wastewater branch are used for controlling the wastewater backflow branch to execute a first wastewater backflow operation, and the first wastewater backflow operation is particularly used for backflow of wastewater discharged from a wastewater outlet to a supercharging device according to a matched proportion and then inputting the wastewater into a water inlet of a filter element;

When the first real-time water quality value is smaller than or equal to the first flushing water quality threshold value, determining that the target wastewater branch at least comprises a wastewater backflow branch and determining the adjustment parameters of the target wastewater branch, wherein the adjustment parameters are specifically used for controlling the wastewater backflow branch to backflow all wastewater discharged from the wastewater outlet to the water inlet of the filter element after the wastewater backflow branch is returned to the supercharging device.

In the embodiment of the invention, in the process of carrying out pure water backflow and waste water backflow double-circulation flushing, the water quantity conditions of the waste water discharge branch and the waste water backflow branch can be dynamically adjusted according to the first real-time water quality value through the monitored first real-time water quality value of the waste water outlet of the water production branch, so that the optimal flushing effect is achieved, and meanwhile, the water can be saved. In the embodiment of the invention, two flushing water quality thresholds are set: a first flush water quality threshold and a second flush water quality threshold, wherein the first flush water quality threshold is less than the second flush water quality threshold. When judging that the first real-time water quality value is greater than or equal to the second flushing water quality threshold value, the flushing operation of pure water backflow is performed at the initial stage, the first real-time water quality value of water discharged from the waste water outlet is higher due to the fact that the filter element is flushed just to begin, waste water is inconvenient to backflow and reuse, at the moment, the adjustment parameters of the target waste water branch are adjusted, the waste water backflow branch is controlled to be completely closed, the waste water discharge branch is controlled to be completely opened, and all waste water generated at the moment is discharged. Along with the promotion of the flushing process, the salinity in the filter core becomes less and less because of flushing, and simultaneously, the first real-time water quality value of the waste water outlet is gradually reduced, when the first real-time water quality value is monitored to be smaller than the second flushing water quality threshold value and larger than the first flushing water quality threshold value, waste water can be returned through the waste water return branch and reused, at the moment, the adjustment parameters of the target waste water branch are adjusted, and the waste water discharged from the waste water outlet is returned to the water inlet of the filter core after the supercharging device according to the matched proportion, namely, the waste water return branch is controlled to gradually increase the waste water return water quantity and the waste water discharge branch gradually reduce the waste water discharge quantity, and the specific proportion relation can be adjusted according to actual conditions. For example, the first flushing water quality threshold and the second flushing water quality threshold are respectively 5 and 10, and at this time, the monitored first real-time water quality value is 8, and according to the proportional relationship, the adjustment parameters of the target waste water branch can be adjusted, so that 40% (2/5) of the waste water discharged from the waste water outlet flows back through the waste water backflow branch, and 60% (3/5) of the waste water is discharged through the waste water discharge branch. When the first real-time water quality value is smaller than or equal to the first flushing water quality threshold value, the water quality discharged from the wastewater outlet is good, and the water can be completely recycled, at the moment, the adjustment parameters of the target wastewater branch are adjusted, the wastewater backflow branch is controlled to be completely opened, and the wastewater discharge branch is controlled to be completely closed.

Therefore, the method described by the embodiment of the invention can provide a pure water and wastewater double-circulation waterway control mechanism for flushing the filter element, and dynamically adjust the proportion of wastewater recycling while not increasing the salinity of the filter element by monitoring the water quality value of wastewater at the wastewater inlet, so as to achieve the level of finely regulating and controlling the wastewater reflux, thereby being beneficial to realizing the accurate flushing of the filter element, further improving the flushing effect of the filter element and improving the water yield of the water purifier.

Example two

Referring to fig. 2, fig. 2 is a flow chart of another control method of a water purifier according to an embodiment of the invention. As shown in fig. 2, the method for controlling a water purifier may include the following operations:

201. judging whether the filter element meets the flushing condition.

202. And when the filter element is judged to meet the flushing condition, controlling the pure water backflow branch to execute pure water backflow operation.

203. Determining an adjustment parameter of a target wastewater branch according to the first real-time water quality value of the wastewater outlet; and according to the adjustment parameters of the target waste water branch, controlling the target waste water branch to execute corresponding adjustment operation so as to flush the filter element.

In the embodiment of the present invention, for other descriptions of step 201 to step 203, please refer to the detailed descriptions of step 101 to step 103 in the first embodiment, respectively, and the description of the embodiment of the present invention is omitted.

204. Judging whether the filter element meets the flushing end condition, and controlling the pure water reflux branch to execute closing operation when the filter element is judged to meet the flushing end condition.

In the embodiment of the invention, in the process of carrying out double-circulation flushing of pure water backflow and waste water backflow, the water quality value in the filter element is always in the process of continuously reducing, and along with the continuous promotion of flushing, when the filter element is judged to meet the flushing end condition, the filter element is indicated to be flushed, and at the moment, the pure water backflow branch is controlled to execute the closing operation.

Further, determining whether the filter element satisfies the flushing end condition may include the following operations:

judging whether the first real-time water quality value of the wastewater outlet is smaller than or equal to a first end flushing threshold value, and judging that the filter element meets the flushing end condition when the first water quality value is smaller than or equal to the first end flushing threshold value; or,

judging whether a second real-time water quality value of a filter element water inlet of the water producing branch is smaller than or equal to a second finishing flushing threshold value, and judging that the filter element meets the flushing finishing condition when the second real-time water quality value is smaller than or equal to the second finishing flushing threshold value.

In the embodiment of the invention, whether the first real-time water quality value of the wastewater outlet is smaller than or equal to the first end flushing threshold value or whether the second real-time water quality value of the mixed water at the water inlet of the filter element of the water producing branch is smaller than the second end flushing threshold value can be judged or judged.

Further optionally, in order to improve the accuracy of the judgment, the judgment may also be performed in combination with a time dimension. For example, whether the duration of the second real-time water quality value of the mixed water at the water inlet of the filter element of the water producing branch is smaller than the second end flushing threshold is larger than the preset duration is judged.

Therefore, the method described by the embodiment of the invention can provide a pure water and wastewater double-circulation waterway control mechanism for flushing the filter element, and simultaneously provides a plurality of methods for detecting whether the filter element meets the flushing end condition, so that the flushing condition of the filter element can be monitored more accurately, the filter element can be flushed accurately, unnecessary flushing operation is avoided, the flushing effect of the filter element is further improved, and the water yield of the water purifier is improved.

In an alternative embodiment, after controlling the pure water recirculation branch to perform the closing operation in step 204, the method may further include:

205. judging whether a water taking instruction is received or not, and determining an adjustment parameter of a waste water backflow branch according to a first real-time water quality value of a waste water outlet when the water taking instruction is judged to be received; and controlling the waste water backflow branch to execute corresponding adjustment operation according to the adjustment parameters so as to enable the water production branch to carry out mixed water production.

In the embodiment of the present invention, after the pure water backflow branch is controlled to perform the closing operation in step 204, it is indicated that the filter element has been flushed, if a user water intake instruction is received within a certain period of time, at this time, the water in the filter element and the waste water backflow branch still keeps a lower water quality value, and the adjustment parameters of the waste water backflow branch can be determined according to the first real-time water quality value monitored by the waste water outlet, so as to control the waste water backflow branch to perform the corresponding adjustment operation according to the adjustment parameters, and the waste water is recycled, so that the waste water discharged by the waste water outlet is mixed with the raw water in the raw water branch after being reflowed, and the mixed water is formed and is input into the water production branch to perform the water production operation of the mixed water. At this time, the water quality value of the mixed water is kept at a lower level, even lower than that of the raw water, the pure water generated by the water producing branch can be discharged and directly used by users, and the water quality value of the generated waste water can also be kept at a lower level, so that the waste water can be continuously recycled.

Therefore, the method described by the embodiment of the invention can provide a pure water and wastewater double-circulation waterway control mechanism to finish flushing the filter element, and after receiving a water taking instruction, the mixed water making operation is continuously executed only through wastewater reflux circulation, so that the wastewater is reused, the problem that the water quality value of the cup water is poor when a user takes water can be solved, the water yield of the water purifier is improved, and the waste of water resources is avoided.

In another alternative embodiment, determining the adjustment parameter of the target waste water branch according to the first real-time water quality value of the waste water outlet when the water producing branch produces water includes:

judging the magnitude relation between the first real-time water quality value of the wastewater outlet, the first water quality threshold value and the second water quality threshold value when the water producing branch is used for mixing water; wherein the first water quality threshold is less than the second water quality threshold;

determining an adjustment parameter of a wastewater reflux branch according to the magnitude relation between a first real-time water quality value of a wastewater outlet, a first water quality threshold value and a second water quality threshold value when the water production branch carries out mixed water production; the adjusting parameters of the waste water reflux branch are used for controlling the waste water reflux branch to execute second waste water reflux operation, and the second waste water reflux operation is specifically used for refluxing waste water discharged from the waste water outlet to the supercharging device and then inputting the waste water into the water inlet of the filter element when the water producing branch is used for mixing and producing water.

In the embodiment of the invention, two water quality thresholds of water production are set, namely a first water quality threshold and a second water quality threshold, wherein the first water quality threshold is smaller than the second water quality threshold. The adjusting parameters of the waste water reflux branch can be dynamically determined according to the magnitude relation between the first real-time water quality value and the first water quality threshold value and the second water quality threshold value, and the adjusting parameters are at least used for controlling the waste water reflux branch to execute the second waste water reflux operation, wherein the second waste water reflux operation is specifically used for refluxing the waste water discharged from the waste water outlet in the water production branch by utilizing the mixed water in the water production process to the filter core water inlet of the water production branch after being input into the supercharging device. It should be noted that, the method for determining the adjustment parameter in the first embodiment may be used to dynamically determine the adjustment parameter of the waste water recirculation branch. When the first real-time water quality value is smaller than or equal to the first water quality threshold value, the mixed water making initial stage is described, the water quality value of the returned wastewater is lower, the adjustment parameters of the wastewater return branch are adjusted at the moment, the wastewater return branch is controlled to be completely opened, the wastewater discharge branch is controlled to be completely closed, and the wastewater generated at the moment is completely returned. Along with the execution of the waste water backflow circulation, the first real-time water quality value of the waste water discharged by the waste water outlet is continuously increased, when the first real-time water quality value is monitored to be larger than the first flushing water quality threshold value and smaller than the second flushing water quality threshold value, the adjustment parameters of the waste water backflow branch are adjusted at the moment, the waste water discharged by the waste water outlet is backflow to the supercharging device according to the matched proportion and then is input into the filter core water inlet, namely the waste water backflow branch is controlled to gradually increase the waste water backflow quantity and the waste water discharge branch is controlled to gradually reduce the waste water discharge quantity, and the specific proportion relation can be adjusted according to actual conditions. For example, the first water quality threshold and the second water quality threshold are respectively 5 and 10, and the monitored first real-time water quality value is 8, so that according to the proportional relationship, the adjustment parameters of the waste water reflux branch can be adjusted, 40% (2/5) of the waste water discharged from the waste water outlet is refluxed by the waste water reflux branch, and 60% (3/5) of the waste water is discharged by the waste water discharge branch. When the first real-time water quality value is larger than or equal to the second water quality threshold value, the fact that the water quality discharged from the wastewater port is poor at the moment is indicated, the wastewater is inconvenient to flow back and reuse, the adjustment parameters of the wastewater backflow branch are adjusted at the moment, the wastewater backflow branch is controlled to be completely closed, the wastewater discharge branch is controlled to be completely opened, and the wastewater generated at the moment is completely discharged.

Therefore, the method described by the embodiment of the invention can provide a pure water and wastewater double-circulation waterway control mechanism, after the filter element is washed, the water quality value of wastewater at the wastewater port is monitored, the recycling proportion of wastewater is dynamically adjusted, the level of fine regulation and control on wastewater reflux is achieved, the accurate control on mixed water production is facilitated, and the water yield of the water purifier is further improved.

Example III

Referring to fig. 3, fig. 3 is a schematic structural diagram of a water purifier according to an embodiment of the present invention. As shown in fig. 3, the water purifier includes a water producing branch 1, the water producing branch 1 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 with a raw water branch, the pure water outlet is connected with a pure water discharging branch, the waste water outlet is connected with a waste water discharging branch, wherein the filter element can be a common filter element or a reverse osmosis filter element, and the embodiment of the invention is not limited. When the filter core is a reverse osmosis filter core, the upstream of the water producing branch 1 can be further provided with a pressurizing device 13, the pressurizing device 13 is used for generating water pressure difference, the pressurized water can permeate through the filter core, the following pure water backflow branch and the waste water backflow branch can be controlled, and the pure water can further comprise:

The pure water backflow branch is provided with a pure water backflow valve assembly 2, the pure water backflow branch is used for communicating the pure water outlet and the raw water branch, and the pure water backflow valve assembly 2 is used for controlling whether pure water discharged from the pure water outlet flows back to the water inlet of the filter element or not; the pure water reflux branch and the pure water discharge branch are intersected at a first pure water reflux intersection point A, and the pure water reflux branch and the raw water branch are intersected at a second pure water reflux intersection point B; the second pure water return cross point is located upstream of the pressurizing means 13. It should be noted that, in a special case, the first pure water backflow intersection point a where the pure water backflow branch and the pure water discharge branch meet may be any position on the pure water discharge branch, or may be a pure water outlet of the water producing branch 1, and the pure water outlet may be one or two, or may be two. Likewise, the second pure water backflow intersection point B where the pure water backflow branch and the raw water branch meet may be any position on the raw water branch, or may be a filter core water inlet of the water producing branch 1, where the number of the filter core water inlets may be one or two, and the embodiment of the present invention is not limited either;

the waste water backflow branch is provided with a waste water backflow valve assembly 3, the waste water backflow branch is used for communicating a waste water outlet with the raw water branch, and the waste water backflow valve assembly 3 is used for controlling whether waste water discharged from the waste water outlet flows back to the water inlet of the filter element or not; the waste water reflux branch and the waste water discharge branch are intersected at a first waste water reflux intersection point C, and the waste water reflux branch and the raw water branch are intersected at a second waste water reflux intersection point D; the second wastewater return junction is located upstream of the pressurizing means 13. Likewise, referring to the description of the cross point of the pure water return branch, the cross point of the waste water return branch can be at any position of the corresponding branch, and can also be a filter core water inlet or a waste water outlet of the water producing branch;

And a water quality detection device is arranged on a branch communicated with the wastewater outlet and is used for monitoring a first real-time water quality value of the wastewater outlet.

In the embodiment of the invention, raw water enters the water producing branch 1 from the water inlet end, pure water is prepared at the pure water outlet after the raw water is filtered by the filter element, and wastewater is prepared at the wastewater outlet, wherein the pure water is directly discharged from the pure water discharging branch for users to use, and the wastewater is directly discharged from the wastewater discharging branch.

When the filter element is washed, pure water enters the pure water reflux branch from the pure water end, and the pure water reflux valve component 2 controls all or part of pure water to reflux so as to reenter the water production branch 1 and flow to the filter element, so that the circulating flow of the pure water is realized and the filter element is washed. In addition, when the wastewater passes through the first water quality detection device 4 at the wastewater outlet, according to the real-time water quality value of the wastewater monitored by the first water quality detection device 4, the adjustment parameters of the wastewater discharge branch and/or the wastewater reflux branch are determined, and the adjustment parameters are at least used for controlling the opening and closing degree of the wastewater reflux valve assembly 3 and controlling all or part of wastewater reflux, so that pure water refluxed by the pure water reflux branch and wastewater refluxed by the wastewater reflux branch form mixed water, and the mixed water reenters the water production branch 1 and flows to the filter element, thereby realizing the double circulation flow of pure wastewater and flushing the filter element. The present invention is not limited to the position between the second pure water return cross point B and the second waste water return cross point D, but preferably, the second pure water return cross point B is located upstream of the second waste water return cross point D, so that the possibility of occurrence of pure water return branch pollution is reduced.

In addition, be equipped with pure water valve assembly 5 on the pure water discharge branch, be equipped with waste water valve assembly 6 on the waste water discharge branch, comprehensive adjustment pure water reflux valve assembly 2, waste water reflux valve assembly 3, pure water valve assembly 5, waste water valve assembly 6 realize the washing to the filter core.

Therefore, the water purifier provided by the embodiment of the invention can provide a pure water and wastewater double-circulation waterway control mechanism, so that the flushing efficiency of the filter element is improved, the influence of excessive high-concentration wastewater on the service life of the membrane is avoided, the water yield of the water purifier is improved, the quality of drinking water is improved, and the waste of water resources is avoided.

In an alternative embodiment, as shown in fig. 4, fig. 4 is a schematic structural diagram of another water purifier according to an embodiment of the present invention, as shown in fig. 4, a water quality detection device includes:

a first water quality detection device 4 arranged at the wastewater outlet; or/and the combination of the two,

the second water quality detection device 7 is arranged on the waste water return branch; or/and the combination of the two,

and a third water quality detection device 8 arranged on the waste water discharge branch.

In the embodiment of the present invention, the water quality detection device is arranged on the branch connected with the waste water outlet, and the arrangement mode of the water quality detection device can be various, and any combination of the first water quality detection device 4, the second water quality detection device 7 and the third water quality detection device 8 can be adopted, so that the embodiment of the present invention is not limited. For example, when the waste water backflow branch and the waste water discharge branch are intersected at a first waste water backflow intersection point C, and the first waste water backflow intersection point C is 2 waste water outlets of the water production branch, a water quality detection device can be respectively arranged at the waste water backflow branch and the waste water discharge branch. When the waste water backflow branch and the waste water discharge branch share part of the branch, only one water quality detection device can be arranged on the shared part of the branch.

Therefore, the water purifier disclosed by the embodiment of the invention can provide a pure water and wastewater double-circulation waterway control mechanism, can provide various schemes for detecting wastewater quality, and provides various layout schemes for wastewater detection devices, so that the wastewater quality of each wastewater branch is further detected in a refined manner, the control precision of wastewater backflow is improved, the efficiency of flushing a filter element is further improved, and the water yield of the water purifier is improved.

In another alternative embodiment, when the waste water backflow branch and the waste water discharge branch share part of the branch, the shared part of the branch is further provided with waste water proportioning device 9, and the waste water proportioning device 9 is used for adjusting the water volume proportion of waste water discharged from the waste water outlet to flow into the waste water backflow branch and the waste water discharge branch respectively.

In the embodiment of the invention, when the waste water backflow branch and the waste water discharge branch share part of the branch, the waste water backflow valve assembly 3 can be used for controlling the water quantity ratio of waste water backflow, and the waste water ratio device 9 arranged on the shared branch of the waste water backflow branch and the waste water discharge branch can also be used for controlling the waste water ratio. For example, the waste water proportioning device 9 may be a three-way proportioning valve assembly, one end of the waste water proportioning valve assembly is connected with a waste water outlet of the water producing branch, the other two ends of the waste water proportioning valve assembly are respectively connected with a waste water backflow branch and a waste water discharge branch, and the opening and closing degree of each port of the proportioning valve assembly is controlled by voltage to control the water flow.

Therefore, the water purifier disclosed by the embodiment of the invention can provide a pure water and wastewater double-circulation waterway control mechanism, and simultaneously provides a preferable wastewater proportion control scheme, so that the convenience and response precision of the wastewater reflux proportion are improved, the efficiency of flushing the filter element is improved, and the water yield of the water purifier is improved.

In yet another alternative embodiment, a fourth water quality detection device 10 is provided on the raw water branch, the fourth water quality detection device 10 is located downstream of the second pure water backflow junction B and the second waste water backflow junction D and upstream of the water inlet of the filter element, and the fourth water quality detection device 10 is used for detecting the water quality of the mixed water after the pure water backflow branch and/or the water backflow by the waste water backflow branch is mixed with the raw water.

In the embodiment of the invention, the water quality condition of the mixed water can be detected by the fourth water quality detection device 10, so that the control of the pure water reflux branch and the waste water reflux branch can be realized according to the water quality condition of the mixed water, and the flushing operation of the filter element or the mixed water making operation of the water producing branch can be realized.

Still further, a fifth water quality detecting device 11 is arranged on the pure water discharging branch, the fifth water quality detecting device 11 is located between the pure water outlet and the pure water valve component, and the fifth water quality detecting device 11 is used for detecting the pure water quality condition at the pure water outlet of the water producing branch.

Still further, a sixth water quality detecting device 12 is provided on the raw water branch, the sixth water quality detecting device 12 being located upstream of the second pure water return cross point B and the second waste water return cross point D, the sixth water quality detecting device 12 being configured to detect the water quality of the raw water in the raw water branch.

In the embodiment of the invention, referring to the description in the first embodiment or the second embodiment, the intelligent monitoring and control of the water purifier can be realized according to the pure water quality condition at the pure water outlet monitored by the fifth water quality detecting device 11 and the water quality condition of the raw water in the raw water branch monitored by the sixth water quality detecting device 12, the intelligent level is improved, the fine control of the flushing of the filter element is further improved, and the water yield of the water purifier is improved.

Example IV

Referring to fig. 5, fig. 5 is a schematic structural diagram of a control device for a water purifier according to an embodiment of the invention. The device described in fig. 5 can be applied to a water purifier. As shown in fig. 5, the water purifier control device may include:

a memory 401 storing executable program codes;

a processor 402 coupled with the memory 401;

the processor 402 invokes executable program codes stored in the memory 402 to perform part or all of the steps in the water purifier control method disclosed in the first or second embodiment of the present invention.

Example five

The embodiment of the invention discloses a computer storage medium which stores computer instructions for executing the steps in the water purifier control method disclosed in the first or second embodiment of the invention when the computer instructions are called.

The apparatus embodiments described above are merely illustrative, wherein the modules illustrated as separate components may or may not be physically separate, and the components shown as modules may or may not be physical, i.e., may be located in one place, or may be distributed over a plurality of network modules. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.

From the above detailed description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product that may be stored in a computer-readable storage medium including Read-Only Memory (ROM), random-access Memory (Random Access Memory, RAM), programmable Read-Only Memory (Programmable Read-Only Memory, PROM), erasable programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), one-time programmable Read-Only Memory (OTPROM), electrically erasable programmable Read-Only Memory (EEPROM), compact disc Read-Only Memory (Compact Disc Read-Only Memory, CD-ROM) or other optical disc Memory, magnetic disc Memory, tape Memory, or any other medium that can be used for computer-readable carrying or storing data.

It should be noted that the computer program code required for operation of portions of the present description may be written in any one or more programming languages, including an object oriented programming language such as Java, scala, smalltalk, eiffel, JADE, emerald, C ++, c#, vb.net, python, etc., a conventional programming language such as C language, visual Basic, fortran2003, perl, COBOL 2002, PHP, ABAP, a dynamic programming language such as Python, ruby and Groovy, or other programming languages, etc. The program code may run entirely on the computer (PC, embedded smart device, etc.), on the user's computer as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any form of network, such as a Local Area Network (LAN) or a Wide Area Network (WAN), or the connection may be made to an external computer (for example, through the Internet), or the use of services such as software as a service (SaaS) in a cloud computing environment.

Finally, it should be noted that: the embodiment of the invention discloses a water purifier and a control method, which are disclosed as preferred embodiments of the invention, and are only used for illustrating the technical scheme of the invention, but not limiting the technical scheme; although the invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that; the technical scheme recorded in the various embodiments can be modified or part of technical features in the technical scheme can be replaced equivalently; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. The utility model provides a purifier control method, the purifier includes raw water branch road, produces water branch road, waste water and discharges branch road and pure water, produce water branch road and include filter core water inlet, filter core, pure water export and waste water export, its characterized in that, the purifier still includes pure water backward flow branch road and waste water backward flow branch road, be equipped with supercharging device on the raw water branch road, supercharging device is used for producing the water pressure difference, supercharging device is located produce the upstream of water branch road, the method includes:

determining adjustment parameters of a target wastewater branch according to a preset control mode, wherein the target wastewater branch comprises the wastewater discharge branch and the wastewater reflux branch;

according to the adjustment parameters of the target waste water branch, controlling the target waste water branch to execute corresponding adjustment operation so as to flush the filter element; the adjusting parameters of the target waste water branch are used for controlling the waste water backflow branch to execute closing operation or execute first waste water backflow operation, and the first waste water backflow operation is used for backflow of waste water discharged from the waste water outlet to the supercharging device and then inputting the waste water into the filter element water inlet;

when the adjustment parameters of the target wastewater branch circuit are used for controlling the wastewater reflux branch circuit to execute the first wastewater reflux operation, controlling the pure water reflux branch circuit to execute pure water refluxed by the pure water reflux operation and controlling the wastewater reflux branch circuit to execute the wastewater refluxed by the first wastewater reflux operation to execute the flushing operation on the filter element;

and determining the adjustment parameters of the target wastewater branch according to the preset control mode, wherein the adjustment parameters comprise:

2. The method according to claim 1, wherein the determining whether the filter element satisfies a flushing condition comprises:

3. The method according to claim 1 or 2, wherein determining the adjustment parameter of the target waste water branch according to the preset control mode includes:

4. A control method of a water purifier according to claim 1 or 3, wherein after controlling the target waste water branch to perform a corresponding adjustment operation to flush the filter element according to the adjustment parameter of the target waste water branch, the method further comprises:

5. The method according to claim 4, wherein the determining whether the filter element satisfies a flushing end condition comprises:

6. The water purifier control method according to claim 4 or 5, wherein after the control of the pure water return branch to perform a closing operation, the method further comprises:

7. The method according to claim 6, wherein determining the adjustment parameter of the waste water recirculation branch according to the first real-time water quality value of the waste water outlet when the water production branch produces water comprises:

determining an adjustment parameter of the wastewater reflux branch according to the magnitude relation between the first real-time water quality value of the wastewater outlet, the first water quality threshold value and the second water quality threshold value when the water production branch carries out mixed water production; the adjusting parameters of the waste water backflow branch are used for controlling the waste water backflow branch to execute second waste water backflow operation, and the second waste water backflow operation is specifically used for backflow of waste water discharged from the waste water outlet to the supercharging device when the water production branch is used for mixing water production and then inputting the waste water into the water inlet of the filter element.

8. The utility model provides a purifier, the purifier is including producing the water branch road, produce the water branch road including filter core water inlet, filter core, pure water export and waste water export, the filter core water inlet is connected with raw water branch road, pure water exit linkage has pure water to discharge the branch road, waste water export is connected with waste water and discharges the branch road, its characterized in that, the purifier still includes:

the waste water backflow branch is provided with a waste water backflow valve assembly, the waste water backflow branch is used for communicating the waste water outlet with the raw water branch, and the waste water backflow valve assembly is used for controlling whether waste water discharged from the waste water outlet flows back to the water inlet of the filter element or not; the waste water reflux branch and the waste water discharge branch are intersected at a first waste water reflux intersection point, and the waste water reflux branch and the raw water branch are intersected at a second waste water reflux intersection point; the second wastewater reflux intersection point is positioned upstream of the supercharging device;

A water quality detection device is arranged on a branch communicated with the wastewater outlet and is used for monitoring the real-time water quality value of the wastewater outlet; wherein, water quality testing device includes: the first water quality detection device is arranged at the wastewater outlet; or/and the second water quality detection device is arranged on the waste water return branch; or/and a third water quality detection device arranged on the waste water discharge branch;

when the waste water backflow branch and the waste water discharge branch share part of the branch, a waste water proportion device is arranged on the branch shared by the waste water backflow branch and the waste water discharge branch and used for adjusting the water quantity proportion of waste water discharged by the waste water outlet to flow into the waste water backflow branch and the waste water discharge branch respectively.

9. The water purifier of claim 8, wherein the purified water discharge branch is provided with a purified water valve assembly; and a wastewater valve assembly is arranged on the wastewater discharge branch.

10. The water purifier of claim 8, wherein a fourth water quality detection device is disposed on the raw water branch, the fourth water quality detection device is located downstream of the second pure water backflow cross point and the second waste water backflow cross point and upstream of the water inlet of the filter element, and the fourth water quality detection device is used for detecting water quality conditions of mixed water formed by mixing pure water flowing back by the pure water backflow branch with waste water flowing back by the waste water backflow branch.

11. The water purifier of claim 9, wherein a fifth water quality detection device is provided on the purified water discharge branch, the fifth water quality detection device being located between the purified water outlet and the purified water valve assembly, the fifth water quality detection device being configured to detect a water quality condition of purified water discharged from the purified water outlet.

12. The water purifier of claim 8, wherein a sixth water quality detection device is further provided on the raw water branch, the sixth water quality detection device being located upstream of the second pure water backflow intersection and the second wastewater backflow intersection, the sixth water quality detection device being configured to detect a water quality condition of raw water.