CN115991518A

CN115991518A - Water purifier and control method

Info

Publication number: CN115991518A
Application number: CN202111215042.3A
Authority: CN
Inventors: 陈小平; 吕苏; 晏博; 李大川; 李中扬
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: 2023-04-21

Abstract

The invention discloses a water purifier and a control method, wherein the water purifier comprises a water producing branch, a front device, a supercharging device, a pure water backflow branch and a waste water backflow branch, and 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 the pure water reflux branch to execute pure water reflux operation, and flushing the filter element in the first stage and the second stage; controlling the waste water discharge branch to perform waste water discharge operation; when the second-stage flushing is performed, the waste water backflow branch is controlled to execute the first waste water backflow operation according to a preset control mode, and waste water discharged from the waste water outlet is controlled to flow back to the front-end device, so that the raw water buffered in the front-end device is pushed out to be mixed with pure water flowing back by the pure water backflow branch, and the filter element is flushed in the second stage. Therefore, the intelligent control level of the water purifier can be improved, the flushing efficiency of the filter element is improved, the water yield of the water purifier is improved, and the waste of water resources is avoided.

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 reverse osmosis pressure membranes and other devices are becoming popular. However, after the water purifier is left for a while, ions on the wastewater side of the reverse osmosis pressure filter core permeate to the pure water side, so that the total dissolved solids TDS of the pure water is raised. When the water purifier is started again, the TDS value of the purified water discharged in the earlier stage is higher, so that the problem of 'first cup' of the water purifier is formed.

In practical application, the problem of "first cup water" is solved, and a simple water purifier with a pure water backflow waterway is generally adopted for timing flushing, namely, pure water is used for flushing the reverse osmosis pressure membrane every a period of time. However, the practice finds that the solution mode is single, and more waste water is generated in the flushing process, so that the water yield is reduced, and higher water resource waste is caused.

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 multi-stage waterway control mechanism combining pure water and wastewater circulation to effectively flush and produce water for the water purifier, so that the intelligent control level of the water purifier is remarkably improved, the flushing efficiency of a filter element is improved, the service life of a membrane is prevented from being influenced by excessive high-concentration wastewater, 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 order to solve the above technical problem, 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 front device, a pure water backflow branch and a waste water backflow branch, the raw water branch is provided with a supercharging device, the supercharging device is used for generating a water pressure difference, the supercharging device is located at the downstream of the front device and at the upstream of the water producing branch, the method includes:

judging whether the filter element meets the flushing condition, and when the filter element meets the flushing condition, controlling the pure water backflow branch to execute pure water backflow operation, 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 so as to enable the pure water to be mixed with raw water of the raw water branch to flush the filter element in a first stage and a second stage;

controlling the waste water discharge branch to perform a waste water discharge operation while the first stage flushing is performed;

When the second-stage flushing is carried out, determining a first adjustment parameter of the waste water reflux branch according to a preset control mode; according to the first adjustment parameter of the waste water reflux branch, controlling the waste water reflux branch to execute a first waste water reflux operation, wherein the first waste water reflux operation is used for controlling waste water discharged by the waste water outlet to reflux to the front-end device so as to push out raw water buffered in the front-end device to be mixed with pure water refluxed by the pure water reflux branch for flushing the filter element in the second stage.

As an alternative embodiment, in the first aspect of the present invention, the method further includes:

judging whether the first-stage flushing is finished or not when the first-stage flushing is carried out, and starting the second-stage flushing when the first-stage flushing is judged to be finished;

wherein the determining whether the flushing of the first stage is completed includes:

judging whether the real-time water quality value of the wastewater outlet is smaller than or equal to a first water quality threshold value, and judging that the flushing of the first stage is finished when the real-time water quality value of the wastewater outlet is smaller than or equal to the first water quality threshold value; or alternatively, the process may be performed,

Judging whether the duration of the first-stage flushing exceeds a first preset duration, and judging that the first-stage flushing is finished when judging that the duration of the first-stage flushing exceeds the first preset duration.

and when the second-stage flushing is carried out, judging whether the second-stage flushing is finished, and when the second-stage flushing is judged to be finished, controlling the pure water backflow branch to execute closing operation.

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 controlling raw water in the raw water branch and water cached in the front device to be mixed and enter the water producing branch to execute water producing operation when the water taking instruction is judged to be received;

controlling the pure water discharge branch to execute pure water discharge operation, and determining a second adjustment parameter of the waste water reflux branch according to the preset control mode;

and controlling the waste water reflux branch to execute a second waste water reflux operation according to a second adjustment parameter of the waste water reflux branch, wherein the second waste water reflux operation is used for controlling waste water discharged by the waste water outlet to reflux to the front-end device so as to be mixed with raw water in the raw water branch to enter the front-end device.

As an optional implementation manner, in the first aspect of the present invention, the determining whether the flushing of the second stage is completed includes:

judging whether the real-time water quality value of the wastewater outlet is smaller than or equal to a second water quality threshold value, and judging that the flushing of the second stage is finished when the first water quality value is smaller than or equal to the second water quality threshold value; or alternatively, the process may be performed,

judging whether the water quality value of mixed water formed by mixing the wastewater discharged from the wastewater outlet with raw water in the raw water branch is smaller than or equal to a third water quality threshold value, and judging that the flushing of the second stage is finished when the water quality value of the mixed water is smaller than or equal to the third water quality threshold value.

In an optional implementation manner, in a first aspect of the present invention, the determining, according to a preset control mode, a first adjustment parameter of the waste water recirculation branch includes:

according to a preset control mode, determining a first adjustment parameter of the waste water backflow branch, wherein the adjustment parameter comprises a first adjustment duration and a second adjustment duration;

the first adjustment duration is used for indicating duration of controlling the waste water discharged by the waste water outlet to flow back to the front device according to the matched proportion;

The second adjustment duration is used for indicating the duration of controlling the total waste water discharged by the waste water outlet to flow back to the front-end device.

judging the size relation between the 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 greater than the second flush water quality threshold;

when the real-time water quality value of the wastewater outlet is judged to be smaller than the first flushing water quality threshold value and larger than the second flushing water quality threshold value, determining a first adjustment parameter of the wastewater reflux branch, wherein the first adjustment parameter is particularly used for controlling wastewater discharged by the wastewater outlet to reflux to the front device according to a matched proportion;

when the real-time water quality value is smaller than or equal to the second flushing water quality threshold value, determining a first adjustment parameter of the waste water backflow branch, wherein the first adjustment parameter is specifically used for controlling all waste water discharged by the waste water outlet to flow back to the front-end device.

As an optional implementation manner, in the first aspect of the present invention, the determining, according to the preset control mode, the second adjustment parameter of the waste water recirculation branch includes:

judging whether the preset control mode is a time mode or not, and determining a second adjustment parameter of the waste water backflow branch according to the preset control mode when the preset control mode is the time mode, wherein the second adjustment parameter comprises duration time for controlling waste water of the waste water backflow branch to flow back in proportion;

judging whether the preset control mode is a water quality mode or not, and determining a second adjustment parameter of the wastewater reflux branch according to the real-time water quality value of the wastewater outlet when the water producing branch produces water when the control mode is judged to be the water quality mode;

wherein, according to the real-time water quality value of the waste water outlet when the water producing branch produces water, determining the second adjustment parameter of the waste water reflux branch comprises:

judging the size relation between the 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 circuit executes water producing operation; wherein the first water quality threshold is less than the second water quality threshold;

When the real-time water quality value of the wastewater outlet is judged to be smaller than the second water quality threshold, determining the wastewater reflux proportion of the wastewater reflux branch according to the magnitude relation between the real-time water quality value and the first water quality threshold and the second water quality threshold;

and generating a second adjustment parameter of the waste water reflux branch according to the waste water reflux proportion.

Judging whether the first water quality value of the wastewater outlet exceeds a fourth water quality threshold value, and judging that the filter element meets a flushing condition when the first water quality value exceeds the fourth water quality threshold value; or alternatively, the process may be performed,

judging whether a second water quality value of a water inlet of the filter element exceeds a fifth water quality threshold value, and judging that the filter element meets a flushing condition when the second water quality value exceeds the fifth water quality threshold value; or alternatively, the process may be performed,

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 second 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 of the last flushing of the water producing branch exceeds the second preset duration; or alternatively, the process may be performed,

Judging whether the working time length of the water producing branch circuit exceeds a third 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 third 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 alternatively, the process may be performed,

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 alternatively, the process may be performed,

judging whether the third water quality value of the pure water outlet exceeds a sixth water quality threshold value, and judging that the filter element meets a flushing condition when judging that the third water quality value of the pure water outlet exceeds the sixth water quality threshold value; or alternatively, the process may be performed,

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.

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, the waste water outlet is connected with a waste water discharging branch, and the water purifier further comprises:

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 circuit and the pure water discharge branch circuit are intersected at a first pure water backflow intersection point, and the pure water backflow branch circuit and the raw water branch circuit are intersected at a second pure water backflow intersection point; when judging that the filter element meets the flushing condition, the pure water backflow branch is used for partially or completely backflow pure water discharged from the pure water outlet to the supercharging device and inputting the pure water into the water inlet of the filter element, so that the pure water is mixed with raw water of the raw water branch to flush the filter element in a first stage and a second stage; the waste water discharge branch is used for discharging waste water discharged by the waste water outlet when the first-stage flushing is performed; the pressurizing device is positioned downstream of the second pure water reflux intersection point;

The raw water branch is provided with a front device which is used for caching raw water of the raw water branch or/and the waste water outlet to discharge the reflowed waste water;

a waste water return branch, wherein the waste water return branch and the waste water discharge branch are intersected at a first waste water return intersection point, and the waste water return branch and the raw water branch are intersected at a second waste water return intersection point; when the second-stage flushing is performed, the waste water reflux branch is used for refluxing the waste water discharged by the waste water outlet to a front device so as to push out raw water buffered in the front device to be mixed with pure water refluxed by the pure water reflux branch for performing the second-stage flushing on the filter element; wherein the pre-device is located downstream of the second wastewater return junction and upstream of the second pure water return junction.

As an alternative embodiment, in the second aspect of the present invention, 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 component; the pure water discharge branch is provided with a pure water valve component; 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 at the water inlet of the filter element of the water producing branch, and the fourth water quality detection device is used for detecting the water quality condition of the water inlet of the filter element.

In a second aspect of the present invention, a fifth water quality detection device is disposed on the raw water branch, the fifth water quality detection device is located downstream of the second wastewater backflow intersection and upstream of the front device, and the fifth water quality detection device is configured to detect water quality of mixed water formed by mixing the wastewater discharged from the wastewater outlet with raw water in the raw water branch after the wastewater backflow.

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

In a second aspect of the present invention, a seventh water quality detection device is further provided on the raw water branch, the seventh water quality detection device being located upstream of the second wastewater return junction, the seventh water quality detection device being configured to detect a water quality condition of raw water in the raw water branch.

In a third aspect, the present invention discloses another 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 front device, 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 the pure water reflux branch to execute pure water reflux operation, and flushing the filter element in the first stage and the second stage; controlling the waste water discharge branch to perform waste water discharge operation; when the second-stage flushing is performed, the waste water backflow branch is controlled to execute the first waste water backflow operation according to the real-time water quality value of the waste water outlet, and waste water discharged by the waste water outlet is controlled to flow back to the front-end device, so that raw water buffered in the front-end device is pushed out to be mixed with pure water flowing back by the pure water backflow branch to perform the second-stage flushing on the filter element. Therefore, the invention can provide a multistage waterway control mechanism combining pure water and wastewater circulation to effectively flush and prepare water for the water purifier, thereby remarkably improving the intelligent control level of the water purifier, improving the flushing efficiency of the filter element, avoiding the influence of the wastewater with too high concentration on the service life of the membrane, improving the water yield of the water purifier, improving the quality of drinking water and avoiding 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 front-end device 5; a pure water valve assembly 6; a waste water valve assembly 7; a second water quality detection device 8; a third water quality detection device 9; a wastewater proportioning device 10; a seventh water quality detection device 11; a sixth water quality detection device 12; a fourth water quality detection device 13; a fifth water quality detection device 14; a supercharging device 15; 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, and provides a multi-stage waterway control mechanism combining pure water and wastewater circulation so as to effectively flush and prepare water for the water purifier, obviously improve the intelligent control level of the water purifier, improve the flushing efficiency of a filter element, prevent the service life of a membrane from being influenced by the wastewater with too high concentration, improve the water yield of the water purifier, improve the quality of drinking water and avoid the waste of water resources. 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 front device, 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 pressurized 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 front device and is pressurized by the pressurizing device, then is input into a water inlet of a filter element of the water producing branch, filtered into pure water and waste water by the filter element of the water producing branch, and pure water can flow back to the downstream of the front device through the pure water backflow branch and then is input into the water producing branch through the pressurizing device, and can be discharged through the pure water discharge branch; the wastewater can flow back to the upstream of the front-end device through the wastewater backflow branch and then is input into the front-end device, and can be discharged through the wastewater 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. In the embodiment of the invention, the front device is used for buffering water input by the raw water branch and/or the waste water reflux branch. The front device may include a single-cavity water storage device, a multi-cavity water storage device, an air bag water storage device, a filtering device, and the like, and the embodiment of the invention is not limited. In addition, the present invention is not limited to the capacity of the front-end device, but preferably, the capacity of the front-end device is not fixed and is adjustable.

102. When the filter element meets the flushing condition, the pure water reflux branch is controlled to execute pure water reflux operation, and the filter element is flushed in the first stage and the second stage.

In the embodiment of the invention, when the filter element is judged to meet the flushing condition, the filter element is required to be flushed, and the flushing of the filter element in the embodiment of the invention is divided into two stages: a first stage rinse and a second stage rinse. Whether the washing in the first stage or the washing in the second stage is performed, the pure water needs to be controlled to flow back to the supercharging device along the pure water backflow branch and then is input to the water inlet of the filter element of the water production branch so as to flush the filter element, namely, the pure water backflow operation is performed by the pure water backflow branch. 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 controlling the flow rate of the pure water reflux may be performed by controlling a valve assembly on the pure water reflux branch by a controller.

103. The waste water discharge branch is controlled to perform a waste water discharge operation while the first stage flushing is performed.

In the embodiment of the invention, during the flushing in the first stage, only pure water or mixed water of pure water and raw water is input to the water inlet of the filter element of the water producing branch, and the water quality value (such as TDS, alkalinity, hardness and the like) of the input water is obviously very small (i.e. the water quality condition is better), so that a better flushing effect can be achieved on the filter element. Meanwhile, the waste water discharge branch is controlled to be completely opened, and waste water with higher water quality value generated by flushing is completely discharged. For example, when the TDS value at the waste water outlet of the water producing branch is detected to be higher than 200 during the flushing in the first stage, the waste water generated during flushing is completely discharged.

104. When the second-stage flushing is carried out, determining a first adjustment parameter of the waste water reflux branch according to a preset control mode; and controlling the waste water reflux branch to execute the first waste water reflux operation according to the first adjustment parameter of the waste water reflux branch.

In the embodiment of the invention, before the second stage of flushing, the front device is used as a device for caching water, and the front device is cached with the raw water input by the raw water branch. When the second-stage flushing is performed, the pure water reflux branch is controlled to execute pure water reflux operation, and the time or flow of the waste water reflux can be controlled according to a preset control mode. 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, a first adjustment parameter of the waste water reflux branch is determined, wherein the adjustment parameter comprises a first adjustment duration and a second adjustment duration; the first adjustment time length is used for indicating the duration time of controlling the waste water discharged by the waste water outlet to flow back to the front device according to the matched proportion; the second adjustment period is used for indicating the duration of controlling the total waste water discharged by the waste water outlet to flow back to the front-end device. For example, the first adjustment time length and the second adjustment time length are respectively 10 seconds and 20 seconds, so that mixed water flushing (the proportion of waste water reflux in the flushing process gradually changes from 0% to 100%) for 10 seconds and waste water flushing for 20 seconds can be realized, and the whole flushing operation is realized.

The water quality mode can determine a first adjustment parameter of the waste water backflow branch according to a real-time water quality value of a waste water outlet of the real-time monitoring water production branch, and then control the flow of waste water backflow (namely, the first waste water backflow operation) through the first adjustment parameter, so that waste water backflow through the waste water backflow branch is input into the front-end device, raw water buffered in the front-end device is pushed out, the part of pushed out raw water is mixed with pure water backflow through the pure water backflow branch to form mixed water, and the filter element is flushed in a second stage. The front-end device can buffer a part of the wastewater flowing back through the wastewater return branch while pushing the part of the wastewater out of the raw water in the front-end device.

Therefore, the method described by the embodiment of the invention can provide a multi-stage waterway control mechanism combining pure water and wastewater circulation to effectively flush and produce water for the water purifier, thereby remarkably improving the intelligent control level of the water purifier, improving the flushing efficiency of the filter element, avoiding the influence of the wastewater with too high concentration on the service life of the membrane, improving the water yield of the water purifier, improving the quality of drinking water and avoiding the waste of water resources.

In an alternative real-time example, determining whether the filter element meets the flushing condition may further include the following operations:

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

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

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 second 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 second preset duration; or alternatively, the process may be performed,

judging whether the working time length of the water producing branch exceeds a third 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 third 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 alternatively, the process may be performed,

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 alternatively, the process may be performed,

Judging whether the third water quality value of the pure water outlet exceeds a sixth 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 sixth preset threshold value; or alternatively, the process may be performed,

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 multi-stage waterway control mechanism combining pure water and wastewater circulation, so that the water purifier can be effectively washed, and meanwhile, a plurality of methods for detecting whether the filter element meets washing conditions are also provided, so that the service condition of the filter element can be monitored more accurately, the filter element can be washed accurately, unnecessary washing operation is avoided, the washing effect of the filter element is further improved, and the water yield of the water purifier is improved.

In another alternative embodiment, the invention may further comprise the operations of:

wherein determining whether the flushing of the first stage is complete comprises:

In the embodiment of the invention, the accurate connection process between the flushing operation of the first stage and the flushing operation of the second stage can be realized by judging whether the flushing of the first stage is finished or not. In the embodiment of the invention, the first mode can be judged by detecting whether the real-time water quality value of the wastewater outlet is smaller than or equal to the first water quality threshold, because only pure water or mixed water of pure water and raw water is input into the filter core water inlet of the water producing branch to flush the filter core in the flushing process of the first stage, the monitored real-time water quality value of the wastewater outlet is continuously reduced, when the monitored real-time water quality value of the wastewater outlet is lower than the first water quality threshold, the flushing of the first stage can be judged to be finished, for example, when the TDS value at the wastewater outlet of the water producing branch is detected to be smaller than or equal to 200 in the flushing of the first stage, the flushing operation of the first stage can be considered to be finished; the second mode is to judge through the duration of the flushing process of the first stage, namely, to judge regularly, when judging that the duration of the flushing of the first stage exceeds the first preset duration, judging that the flushing of the first stage is finished, for example, when the filter element meets the flushing condition, controlling the pure water reflux branch to execute the pure water reflux operation to start timing, taking the starting time of the flushing operation of the first node as the starting time of the flushing operation of the first node, and when detecting that the duration of the flushing operation of the first stage exceeds 30 seconds, judging that the flushing operation of the first stage is finished.

Therefore, the method described by the embodiment of the invention can provide a multi-stage waterway control mechanism combining pure water and wastewater circulation to effectively flush the water purifier, wherein accurate connection nodes and processes among various stages can be accurately controlled by diversified control modes, the control precision in the flushing process of the filter element is improved, the accurate flushing of the filter element is further realized, 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 yet another alternative embodiment, determining the first adjustment parameter of the wastewater return branch based on the real-time water quality value of the wastewater outlet includes:

In the embodiment of the invention, in the process of carrying out pure water backflow and waste water backflow double-circulation flushing, namely in the flushing process of the second stage, the water quantity conditions of the waste water discharge branch and the waste water backflow branch can be dynamically adjusted according to the real-time water quality value through the monitored 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 the real-time water quality value is judged to be greater than or equal to the first flushing water quality threshold value, the initial stage of flushing at the second stage or flushing at the first stage still is indicated, the real-time water quality value of the wastewater discharged from the wastewater outlet obtained by flushing the filter element is higher, the wastewater is inconvenient to reflux and reuse, the first adjustment parameter of the wastewater reflux branch is adjusted, the wastewater reflux 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. Along with the promotion of flushing process, the salinity in the filter core becomes less and less because of flushing, simultaneously the real-time water quality value of the waste water outlet also gradually reduces, when the real-time water quality value is monitored to be smaller than the first flushing water quality threshold value and larger than the second flushing water quality threshold value, waste water can flow back to the front-end device through the waste water backflow branch, at the moment, the first adjustment parameter of the waste water backflow branch is adjusted, waste water discharged by the waste water outlet is backflow to the front-end device according to the matched proportion, namely, the waste water backflow branch is controlled to gradually increase the waste water backflow amount and the waste water discharge branch gradually reduces the waste water discharge amount, 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 10 and 5, and the first real-time water quality value monitored at this time is 8, and then according to the proportional relationship, the first adjustment parameter of the waste water reflux branch can be adjusted, so that 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 real-time water quality value is smaller than or equal to the second flushing water quality threshold value, the fact that the water quality discharged from the wastewater port is good at the moment is indicated, the wastewater can be completely returned to the front-end device for recycling, the first adjustment parameters of the wastewater return branch are adjusted at the moment, the wastewater return 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 multi-stage waterway control mechanism combining pure water and wastewater circulation, so that the water quality value of wastewater at the wastewater inlet is monitored while the water purifier is effectively flushed, the proportion of wastewater recycling is dynamically adjusted while the salinity of the filter element is not increased, the level of fine regulation and control on wastewater backflow is achieved, the accurate flushing of the filter element is facilitated, the flushing effect of the filter element is further improved, meanwhile, a foundation is provided for recycling and reusing the low-concentration wastewater at the subsequent part, and the water production rate of the water purifier is further improved.

Example two

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

202. When the filter element meets the flushing condition, the pure water reflux branch is controlled to execute pure water reflux operation, and the filter element is flushed in the first stage and the second stage.

203. The waste water discharge branch is controlled to perform a waste water discharge operation while the first stage flushing is performed.

204. When the second-stage flushing is carried out, determining a first adjustment parameter of the waste water reflux branch according to a preset control mode; and controlling the waste water reflux branch to execute the first waste water reflux operation according to the first adjustment parameter of the waste water reflux branch.

205. Judging whether the flushing of the second stage is finished, and controlling the pure water reflux branch to execute closing operation when judging that the flushing of the second stage is finished.

In the embodiment of the invention, in the process of carrying out double-circulation flushing of pure water reflux and waste water reflux, along with continuous promotion of flushing, the water quality value in the filter element is always in the process of continuously reducing, and when the flushing of the second stage is judged to be finished, the pure water reflux branch is controlled to execute closing operation.

Further, determining whether the second stage flush is complete may include the following operations:

judging whether the water quality value of mixed water formed by mixing the waste water discharged from the waste water outlet with raw water in the raw water branch is smaller than or equal to a third water quality threshold value, and judging that the flushing of the second stage is finished when the water quality value of the mixed water is smaller than or equal to the third water quality threshold value.

In the embodiment of the invention, in the flushing process of the second stage, whether the flushing of the second stage is finished can be judged by judging whether the real-time water quality value of the wastewater outlet is smaller than or equal to a second water quality threshold value or whether the water quality value of mixed water formed by mixing the wastewater discharged by the wastewater outlet after the wastewater is refluxed and raw water in a raw water branch is smaller than or equal to a third water quality threshold value. It should be noted that, referring to the flushing process of the first stage, it may also be determined whether the flushing of the second stage is completed by time or duration alone, for example, determining that the time from the end of the flushing of the first stage is counted, calculating whether the duration of the flushing process of the second stage exceeds a preset duration, for example, when the duration of the second flushing operation is detected to exceed 20 seconds, it may be considered that the flushing operation of the second stage is completed.

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 time that the water quality value of the mixed water formed by mixing the waste water discharged from the waste water outlet with the raw water in the raw water branch after the waste water is returned is longer than the preset time period is judged.

Therefore, the method described by the embodiment of the invention can provide a multi-stage waterway control mechanism combining pure water and wastewater circulation, so that the water purifier can be effectively washed, meanwhile, the accurate connection nodes and processes among all stages can be accurately controlled in a diversified control mode, the control precision in the filter element washing process is improved, the filter element is accurately washed, unnecessary washing operation is avoided, the filter element washing effect is further improved, and the water yield of the water purifier is improved.

In an alternative embodiment, after the pure water reflux branch is controlled to perform the closing operation in step 205, the following operations are further included:

206. judging whether a water taking instruction is received or not, and when the water taking instruction is judged to be received, controlling raw water in the raw water branch and water cached in the front device to be mixed and enter the water producing branch to execute water producing operation.

In the embodiment of the present invention, after the pure water backflow branch is controlled to perform the closing operation in step 205, it is indicated that the filter element has been flushed (including the flushing in the first stage and the flushing in the second stage), if the user's water intake instruction is received in a certain period of time, the mixed water of the raw water and the wastewater buffered in the front-end device still maintains a good water quality, and the water production operation can be performed by directly using the mixed water and the wastewater backflow circulation of the front-end device. At this time, the pure water discharge branch is controlled to perform pure water discharge operation to provide pure water required by the water taking instruction, a second adjustment parameter of the waste water return branch is determined according to a preset control mode, and meanwhile, the waste water return branch is controlled to perform second waste water return operation according to the second adjustment parameter of the waste water return branch, wherein the second waste water return operation is used for controlling waste water discharged from the waste water outlet in the water making process of the water producing branch to return to the front-end device so as to be mixed with raw water in the raw water branch to enter the front-end device.

Therefore, the method described by the embodiment of the invention can provide a multi-stage waterway control mechanism combining pure water and wastewater circulation, and after the water purifier is effectively washed, the operation of mixing water and preparing water is continuously carried out through the wastewater reflux circulation, so that the purposes of reutilizing the mixed water in the front device and the wastewater in the water preparing process are achieved, the aim of secondary water saving is fulfilled, the problem that the water quality value of the cup water is poor when a user takes water is solved, the water yield of the water purifier is improved, and the waste of water resources is avoided.

In another alternative embodiment, determining the second adjustment parameter of the waste water recirculation branch according to the preset control mode includes:

judging whether a preset control mode is a water quality mode or not, and determining a second adjustment parameter of the wastewater reflux branch according to a real-time water quality value of the wastewater outlet when the water producing branch produces water when the control mode is judged to be the water quality mode;

Wherein, according to the real-time water quality value of waste water outlet when producing water branch road system water, confirm the second adjustment parameter of waste water backward flow branch road, include:

judging the size relation between the real-time water quality value of the wastewater outlet and the first water quality threshold value and the second water quality threshold value when the water producing branch performs water producing operation; wherein the first water quality threshold is less than the second water quality threshold;

when the real-time water quality value of the wastewater outlet is judged to be smaller than the second water quality threshold value, determining the wastewater reflux proportion of the wastewater reflux branch according to the magnitude relation between the real-time water quality value and the first water quality threshold value and the second water quality threshold value;

In the embodiment of the invention, two water quality thresholds 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 second adjustment parameter of the waste water reflux branch can be dynamically determined according to the magnitude relation between the real-time water quality value of the waste water outlet and the first water quality threshold and the second water quality threshold when the water producing branch executes the water producing operation, and the second adjustment parameter is used for controlling the waste water reflux branch to execute the waste water reflux operation, and the waste water reflux operation is particularly used for refluxing the waste water discharged from the waste water outlet in the water producing branch utilizing the mixed water producing process. It should be noted that, the method for determining the first adjustment parameter in the first embodiment may be referred to dynamically determine the second adjustment parameter of the waste water recirculation branch. When the real-time water quality value of the wastewater outlet is smaller than or equal to the first water quality threshold value when the water producing branch circuit executes water producing operation, the water quality value of the wastewater which is in the initial stage of mixed water producing at the moment is lower, the second adjusting parameter of the wastewater reflux branch circuit is adjusted at the moment, the wastewater reflux branch circuit is controlled to be completely opened, the wastewater discharge branch circuit is controlled to be completely closed, and the wastewater produced at the moment is completely refluxed. Along with the execution of the wastewater reflux circulation, the real-time water quality value of the wastewater outlet is continuously increased when the water producing branch performs the water producing operation, and when the real-time water quality value is monitored to be larger than the first water producing water quality threshold value and smaller than the second water producing water quality threshold value, the second adjusting parameter of the wastewater reflux branch is adjusted at the moment and used for refluxing the wastewater discharged by the wastewater outlet in proportion, namely the wastewater reflux branch is controlled to gradually reduce the wastewater reflux quantity and the wastewater discharge branch is controlled to gradually increase the wastewater discharge quantity, and the specific proportion relation can be adjusted according to the actual situation. For example, the first water quality threshold and the second water quality threshold are respectively 5 and 10, and when the monitored real-time water quality value of the wastewater outlet is 8 during the water making operation of the water producing branch, the second adjustment parameter of the wastewater reflux branch can be adjusted according to the proportional relationship, so that 40% (2/5) of the wastewater discharged from the wastewater outlet is refluxed by the wastewater reflux branch, and 60% (3/5) of the wastewater is discharged by the wastewater discharge branch. When the real-time water quality value of the wastewater outlet is larger than or equal to the second water quality threshold value when the water producing branch circuit executes water producing operation, the fact that the water quality discharged by the wastewater outlet is poor at the moment is indicated, the wastewater is inconvenient to flow back and reuse at the moment, the second adjusting parameter of the wastewater backflow branch circuit is adjusted at the moment, the wastewater backflow branch circuit is controlled to be completely closed, the wastewater discharge branch circuit 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 multi-stage waterway control mechanism combining pure water and wastewater circulation to effectively flush the water purifier, and dynamically adjust the recycling proportion of wastewater by monitoring the water quality value of wastewater at a wastewater port, so as to achieve the level of finely regulating and controlling the wastewater backflow, thereby being beneficial to realizing the accurate control of mixed water production and further improving the water yield of the water purifier.

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 15, the pressurizing device 15 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 water purifying can further comprise:

A water quality detection device 4 is arranged on a branch communicated with the wastewater outlet, and the water quality detection device 4 is used for monitoring the real-time water quality value of the wastewater outlet;

the pure water backflow branch circuit is intersected with the pure water discharge branch circuit at a first pure water backflow intersection point A, and the pure water backflow branch circuit is intersected with the raw water branch circuit at a second pure water backflow intersection point B; when the filter element meets the flushing condition, the pure water reflux branch is used for refluxing part or all of the pure water discharged from the pure water outlet to the supercharging device 15 and inputting the pure water into the water inlet of the filter element so as to mix the pure water with the raw water of the raw water branch to flush the filter element in the first stage and the second stage; the waste water discharge branch is used for discharging waste water discharged from the waste water outlet when the first-stage flushing is carried out; the pressurizing device 15 is positioned downstream of the second pure water reflux intersection B;

the raw water branch is provided with a front device 5, wherein the front device 5 is used for buffering raw water of the raw water branch and/or discharging returned wastewater from a wastewater outlet;

a waste water reflux branch, wherein 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; when the second-stage flushing is carried out, the waste water reflux branch is used for refluxing the waste water discharged from the waste water outlet to the front-end device 5 so as to push out the raw water buffered in the front-end device 5 to be mixed with the pure water refluxed by the pure water reflux branch for carrying out the second-stage flushing on the filter element; wherein the pre-device 5 is located downstream of the second wastewater return junction D and upstream of the second pure water return junction B.

In the embodiment of the invention, raw water flows through the front device 5 from the water inlet end and enters the water producing branch 1, the raw water is filtered by the filter element, pure water is prepared at the pure water outlet, and waste water is prepared at the waste water outlet, wherein the pure water is directly discharged from the pure water discharging branch for users to use, and the waste water is directly discharged from the waste water discharging branch.

When the filter element is subjected to the first-stage flushing, the front device 5 can buffer the raw water input by the raw water branch, 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 into the water production branch 1 again and flow to the filter element, so that the first-stage flushing of the filter element by pure water or the first-stage flushing of the filter element by mixed water of the pure water and the raw water discharged from the front device can be realized, and flushing wastewater generated in the first-stage flushing process can be discharged through the wastewater discharge branch. In addition, when the filter element is flushed in the second stage, pure water still needs to be controlled to enter the pure water reflux branch from the pure water end, and meanwhile, when the waste water passes through the water quality detection device 4 at the waste water outlet, the first adjustment parameter of the waste water reflux branch is determined according to the real-time water quality value of the waste water monitored by the water quality detection device 4, and the first adjustment parameter is used for controlling the opening and closing degree of the waste water reflux valve assembly 3 and controlling all or part of waste water to reflux to the front-end device so as to push out the raw water buffered in the front-end device 4 to be mixed with the pure water refluxed by the pure water reflux branch for flushing the filter element in the second stage, thereby realizing the double circulation flow of the pure waste water and flushing the filter element. In addition, the present invention is not limited to the capacity of the front-end device, but preferably, the capacity of the front-end device is not fixed and is adjustable.

In addition, be equipped with pure water valve assembly 6 on the pure water discharge branch, be equipped with waste water valve assembly 7 on the waste water discharge branch, as described above the first stage wash and the second stage wash process, comprehensive adjustment pure water return valve assembly 2, waste water return valve assembly 3, pure water valve assembly 6, waste water valve assembly 7 realize the multistage washing operation to the filter core. It should be noted that, the valve assemblies may be opened or closed, and the opening degree (the opening degree of the switch) may also be controlled, which is not limited by the embodiment of the present invention.

Therefore, the water purifier disclosed by the embodiment of the invention can provide a multi-stage waterway control mechanism combining pure water and wastewater circulation so as to effectively flush and prepare water for the water purifier, thereby remarkably improving the intelligent control level of the water purifier, improving the flushing efficiency of a filter element, avoiding the influence of excessive high-concentration wastewater on the service life of a membrane, improving the water yield of the water purifier, improving the quality of drinking water and avoiding the waste of water resources.

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, and as shown in fig. 4, the water quality detection device may include:

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 8 is arranged on the waste water return branch; or/and the combination of the two,

and a third water quality detection device 9 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 wastewater 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 8 and the third water quality detection device 9 can be adopted, and 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 producing 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 a part of the branch, only one water quality detection device can be arranged on the shared part of the branch, and the specific arrangement mode is not limited by the embodiment of the invention.

Therefore, the water purifier disclosed by the embodiment of the invention can provide a multi-stage waterway control mechanism combining pure water and wastewater circulation so as to effectively flush and prepare water for the water purifier, and can provide various schemes for detecting the quality of wastewater, and various layout schemes for the wastewater detection device, so that the wastewater quality of each wastewater branch is further and finely detected, 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 a part of the branches, the shared part of the branches is further provided with a waste water proportion device 10, and the waste water proportion device 10 is used for adjusting the water quantity proportion of the waste water discharged from the waste water outlet flowing 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 10 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 10 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 multi-stage waterway control mechanism combining pure water and wastewater circulation so as to effectively flush and prepare water for the water purifier, and simultaneously provides a preferable wastewater proportion control scheme, so that convenience and response precision of a wastewater reflux proportion are improved, the efficiency of flushing a filter element is improved, and the water yield of the water purifier is improved.

In a further alternative embodiment, a fourth water quality detection device 13 is arranged at the water inlet of the filter element of the water producing branch, wherein the fourth water quality detection device 13 is used for detecting the water quality condition of the water inlet of the filter element.

In this embodiment of the present invention, the fourth water quality detection device 13 may specifically be located downstream of the second pure water backflow intersection B and upstream of the water inlet of the filter element of the water producing branch. The fourth water quality detection device 13 monitors the water quality of the returned pure water when the front device 5 does not discharge the buffer water and the pure water return branch to return the pure water; the water quality condition of the mixed water of the discharged cache water and pure water can be monitored when the front device 5 discharges the cache water and the pure water flows back to the pure water return branch; the water quality of the buffer water discharged by the front device can be monitored when the buffer water is discharged by the front device 5 and the pure water flows back but does not flow back, and the embodiment of the invention is not limited. In addition, 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 by the fourth water quality detection device 13, and the flushing operation of the filter element or the mixed water making operation of the water producing branch can be realized. For example, when it is determined that the water quality value detected by the fourth water quality detecting means 13 exceeds the preset water quality threshold value, it may be determined that the filter cartridge satisfies the flushing condition.

In a further development, a fifth water quality detection device 14 is arranged on the raw water branch, the fifth water quality detection device 14 is located at the downstream of the second wastewater backflow intersection point D and at the upstream of the front device 5, wherein the fifth water quality detection device 14 is used for detecting the water quality condition of mixed water formed by mixing the wastewater discharged from the wastewater outlet after backflow with raw water in the raw water branch.

In the embodiment of the present invention, the fifth water quality detection device 14 is used to monitor the water quality of the mixed water formed by mixing the returned wastewater with the raw water in the raw water branch, and in the second stage of flushing or in the process of producing water by using the mixed water, the water quality of the mixed water can reflect the water quality of the wastewater outlet of the water producing branch to a certain extent, and when the seventh water quality detection device 11 is further arranged on the raw water branch, the water quality value of the wastewater outlet of the water producing branch can be estimated according to the fifth water quality detection device 14 and the seventh water quality detection device 11. In addition, because the water quality condition of the mixed water can reflect the water quality condition of the wastewater outlet of the water producing branch to a certain extent, the intelligent control can be carried out on the whole water purifier according to the monitored water quality condition of the mixed water by referring to the action of the water quality detection device 4.

In a further development, a sixth water quality detecting device 12 is arranged on the pure water discharge branch, the sixth water quality detecting device 12 is located between the pure water outlet and the pure water valve assembly 6, and the sixth water quality detecting device 12 is used for detecting the water quality condition of the pure water discharged from the pure water outlet. Through the quality of water condition of the pure water of monitoring emission, guarantee out water property stationarity, the control effect of whole purifier carries out real-time feedback.

Therefore, referring to the description in the first embodiment or the second embodiment, the water purifier described in the embodiments of the present invention can provide a multi-stage waterway control mechanism combining pure water and wastewater circulation, so as to effectively flush and produce water for the water purifier, and can also realize intelligent monitoring and control for the water purifier, improve the level of intelligence, further improve the fine control of the flushing of the filter element, and improve the water yield of the water purifier according to the water quality condition monitored by the sixth water quality detecting device 12 and the water quality condition of the raw water in the raw water branch monitored by the seventh water quality detecting device 11.

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 the 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 front device, 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 front device's low reaches and is located produce water branch road's upper reaches, the method includes:

2. The water purifier control method according to claim 1, wherein the method further comprises:

3. The water purifier control method according to claim 1 or 2, characterized in that the method further comprises:

4. The water purifier control method according to claim 3, wherein after the control of the pure water return branch to perform a closing operation, the method further comprises:

5. The method according to claim 4, wherein the determining whether the flushing of the second stage is completed comprises:

6. The method according to any one of claims 1 to 5, wherein determining the first adjustment parameter of the waste water recirculation branch according to the preset control mode includes:

7. The method according to any one of claims 1 to 5, wherein determining the first adjustment parameter of the waste water recirculation branch according to the preset control mode includes:

8. The method according to claim 4 or 5, wherein determining the second adjustment parameter of the waste water recirculation branch according to the preset control mode includes:

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

10. 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:

a waste water return branch, wherein the waste water return branch and the waste water discharge branch are intersected at a first waste water return intersection point, and the waste water return branch and the raw water branch are intersected at a second waste water return intersection point; when the second-stage flushing is performed, the waste water reflux branch is used for refluxing the waste water discharged by the waste water outlet to the front-end device so as to push out raw water buffered in the front-end device to be mixed with pure water refluxed by the pure water reflux branch for performing the second-stage flushing on the filter element; wherein the pre-device is located downstream of the second wastewater return junction and upstream of the second pure water return junction.

11. The water purifier of claim 9, wherein the purified water return branch is provided with a purified water return valve assembly; the waste water reflux branch is provided with a waste water reflux valve component; the pure water discharge branch is provided with a pure water valve component; and a wastewater valve assembly is arranged on the wastewater discharge branch.

12. The water purifier of claim 9 or 10, further comprising:

wherein, water quality testing device includes:

13. The water purifier of claim 11, wherein when the waste water return branch and the waste water discharge branch share a part of the branch, the waste water return branch and the branch shared by the waste water discharge branch are provided with waste water proportioning means for adjusting the water volume proportions of the waste water discharged from the waste water outlet flowing into the waste water return branch and the waste water discharge branch, respectively.

14. The water purifier of claim 12, wherein a fourth water quality detection device is disposed at a water inlet of the filter element of the water producing branch, and the fourth water quality detection device is configured to detect a water quality condition of the water inlet of the filter element.

15. The water purifier of any one of claims 11-13, wherein a fifth water quality detection device is disposed on the raw water branch, the fifth water quality detection device is located downstream of the second wastewater backflow intersection and upstream of the front device, and the fifth water quality detection device is configured to detect water quality of mixed water formed by mixing the wastewater discharged from the wastewater outlet after backflow with raw water in the raw water branch.

16. The water purifier of claim 14, wherein a sixth water quality detection device is provided on the purified water discharge branch, the sixth water quality detection device being located between the purified water outlet and the purified water valve assembly, the sixth water quality detection device being configured to detect a water quality condition of purified water discharged from the purified water outlet.

17. The water purifier of claim 15, wherein a seventh water quality detection device is further disposed on the raw water branch, the seventh water quality detection device being located upstream of the second wastewater return junction, the seventh water quality detection device being configured to detect a water quality condition of raw water in the raw water branch.