WO2022016778A1

WO2022016778A1 - Flushing method for water purifier, water purifier, and device having storage function

Info

Publication number: WO2022016778A1
Application number: PCT/CN2020/134689
Authority: WO
Inventors: 杨旅; 曾振杰; 罗陈
Original assignee: 广东美的白色家电技术创新中心有限公司; 美的集团股份有限公司
Priority date: 2020-07-20
Filing date: 2020-12-08
Publication date: 2022-01-27
Also published as: CN113955826A

Abstract

A flushing method for a water purifier (100), a water purifier (100), and a device having a storage function. The flushing method comprises: receiving a stop instruction; in response to the stop instruction, operating in a first flushing mode for a first period of time, the first flushing mode comprising enabling a water pump (10) to be communicated with a raw water end of a second reverse osmosis filter element (23), a wastewater end of the second reverse osmosis filter element (23) to be communicated with a wastewater port (50), a pure water end of the second reverse osmosis filter element (23) to be communicated with a raw water end of a first reverse osmosis filter element (21), and a wastewater end of the first reverse osmosis filter element (21) to be communicated with the wastewater port (50); replacing wastewater of the first reverse osmosis filter element (21) with pure water of the second reverse osmosis filter element (23); operating in a second flushing mode for a second period of time, the second flushing mode comprising enabling the water pump (10) to be communicated with the raw water end of the second reverse osmosis filter element (23) and the wastewater end of the second reverse osmosis filter element (23) to be communicated with the wastewater port (50); and replacing wastewater of the second reverse osmosis filter element (23) with raw water of the water pump (10). Therefore, the ion concentration value of concentrated water in front of membranes of the first reverse osmosis filter element (21) and the second reverse osmosis filter element (23) is reduced, thereby avoiding contamination of pure water.

Description

Flushing method of water purifier, water purifier and device with storage function

【Technical field】

The invention relates to the technical field of water purification, in particular to a flushing method of a water purifier, a water purifier and a device with a storage function.

【Background technique】

The core component of the reverse osmosis water purifier is the reverse osmosis membrane. The filtration principle is that the raw water before the membrane is driven by pressure, and the ions in the raw water will be intercepted by the reverse osmosis membrane to form concentrated water before the membrane. It forms pure water and realizes the effect of reducing the ion concentration in pure water. When the water purifier stops, the raw water stops flowing. At this time, no pure water is produced. Driven by the difference in ion concentration between the concentrated water and pure water on both sides of the membrane, the ions in the concentrated water will penetrate into the pure water, resulting in pure water. It is polluted, so that when the water purifier is restarted, the TDS concentration in the water that the user receives is relatively high, and the effect of water purification is not achieved.

Therefore, in order to solve the above problems, it is necessary to provide a new flushing method of a water purifier, a water purifier and a device with a storage function.

[Content of the invention]

In order to achieve the above purpose, the present invention provides a flushing method for a water purifier, the water purifier comprises: a water pump; a first reverse osmosis filter element, the raw water end of the first reverse osmosis filter element is connected to the water pump, the first reverse osmosis filter element The waste water end of the reverse osmosis filter element is connected to the waste water port, the pure water end of the first reverse osmosis filter element is connected to the pure water port; the second reverse osmosis filter element, the raw water end of the second reverse osmosis filter element is connected to the water pump, and the second reverse osmosis filter element is connected to the water pump. The waste water end of the osmosis filter element is connected to the waste water port, the pure water end of the second reverse osmosis filter element is connected to the pure water port; the pure water end of the second reverse osmosis filter element is connected to the raw water end of the first reverse osmosis filter element; The flushing method includes: receiving a stop instruction; in response to the stop instruction, running in a first flushing mode for a first time; the first flushing mode includes: conducting a water pump and a raw water end of a second reverse osmosis filter element, a second The waste water end and the waste water port of the reverse osmosis filter element, the pure water end of the second reverse osmosis filter element and the raw water end of the first reverse osmosis filter element, the waste water end and the waste water port of the first reverse osmosis filter element; the pure water passing through the second reverse osmosis filter element Replace the waste water of the first reverse osmosis filter element; run the second flushing mode for a second time; the second flushing mode includes: conducting the water pump and the raw water end of the second reverse osmosis filter element, and the second reverse osmosis filter element. The waste water end and the waste water port; the raw water passing through the water pump replaces the waste water of the second reverse osmosis filter element.

As a further improvement of the present invention, the pure water end of the second reverse osmosis filter element is connected to the waste water port; the flushing method further includes: receiving a start instruction; in response to the start instruction, running the third flushing mode time; the third flushing mode includes: conducting the water pump and the raw water end of the first reverse osmosis filter element, the pure water end and the pure water port of the first reverse osmosis filter element; conducting the water pump and the second reverse osmosis filter element The raw water end of the osmosis filter element, the pure water end and the waste water port of the second reverse osmosis filter element.

As a further improvement of the present invention, after the first flushing mode is run for a first time, the second flushing mode is run for a second time.

As a further improvement of the present invention, the flushing method further includes: during operation in the third flushing mode, detecting and obtaining a first water quality state value of the water pump inlet and a second water quality state value of the pure water inlet ; Update the first time according to the comparison result of the first water quality state value and the second water quality state value.

As a further improvement of the present invention, updating the first time according to the comparison result of the first water quality state value and the second water quality state value includes: determining the difference between the second water quality state value and the first water quality state value If the ratio is greater than the threshold, the first time is increased by unit time.

As a further improvement of the present invention, the flushing method further includes: after running in a third flushing mode for a third time, detecting and obtaining a third water quality state value of the water pump inlet and a fourth water quality state of the pure water inlet value; update the second time and the third time according to the comparison result of the third water quality state value and the fourth water quality state value.

As a further improvement of the present invention, updating the second time and the third time according to the comparison result of the third water quality state value and the fourth water quality state value includes: determining a fourth water quality state If the ratio of the value to the third water quality state value is greater than the threshold, the second time and the third time are both increased by unit time.

As a further improvement of the present invention, the flushing method further includes detecting and obtaining a fifth water quality state value at the waste water end of the first reverse osmosis filter element, and a sixth water quality at the pure water outlet during operation in the first flushing mode. state value; according to the comparison result of the fifth water quality state value and the sixth water quality state value, update the first time; in the process of running in the second flushing mode, detect and obtain the second reverse osmosis filter element The seventh water quality state value at the waste water end, and the eighth water quality state value at the water pump inlet; the second time is updated according to the comparison result of the seventh water quality state value and the eighth water quality state value.

As a further improvement of the present invention, the water quality state value is an ion concentration value.

The present invention also provides a water purifier, comprising: a processor, a memory and a communication circuit, the processor is respectively coupled to the memory and the communication circuit; the processor, the memory and the communication circuit The flushing method described above can be achieved during operation.

The present invention also provides a device with a storage function, the device stores program instructions, and the program instructions can be executed to implement the flushing method as described above.

Compared with the prior art, the beneficial effects of the present invention are:

The flushing method of the water purifier provided by the present invention includes a first flushing mode and a second flushing mode. On the one hand, when running the first flushing mode, the raw water is pressurized by the water pump and then flows into the raw water end of the second reverse osmosis filter element. Under the filtering action of the second reverse osmosis filter element, it is divided into waste water and pure water. The waste water end of the osmosis filter element flows to the waste water outlet, and pure water flows from the pure water end of the second reverse osmosis filter element to the raw water end of the first reverse osmosis filter element, so that the pure water passing through the second reverse osmosis filter element replaces the waste water of the first reverse osmosis filter element. , so that the waste water of the first reverse osmosis filter element flows from the waste water end of the first reverse osmosis filter element to the waste water port and is discharged, thereby reducing the ion concentration value of the concentrated water before the membrane of the first reverse osmosis filter element, so as to prevent the ion concentration value of the concentrated water before the membrane from exceeding the On the other hand, when running the second flushing mode, the raw water flows into the raw water end of the second reverse osmosis filter element after the water pump, so that the raw water passing through the pump replaces the waste water of the second reverse osmosis filter element, so that the first The waste water of the second reverse osmosis filter element flows from the waste water end of the second reverse osmosis filter element to the waste water outlet and is discharged, thereby reducing the ion concentration value of the concentrated water before the membrane of the second reverse osmosis filter element, and avoiding the transfer of the ion concentration value of the concentrated water before the membrane because the ion concentration value is too high. to pure water. Through the joint flushing action of the first flushing mode and the second flushing mode, the ion concentration value of the concentrated water before the membrane of the first reverse osmosis filter element and the second reverse osmosis filter element is reduced, the pure water pollution is avoided, and the restart of the water purifier is ensured. The quality of the effluent after.

【Description of drawings】

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort. in:

1 is a schematic structural diagram of an embodiment of a water purifier of the present invention;

2 is a schematic structural diagram of another embodiment of the water purifier of the present invention;

3 is a schematic structural diagram of another embodiment of the water purifier of the present invention;

4 is a schematic flow chart of an embodiment of a flushing method for a water purifier according to the present invention;

5 is a schematic flow chart of another embodiment of a flushing method for a water purifier according to the present invention;

6 is a schematic diagram of the coordination flow of the three flushing modes of the water purifier of the present invention;

Fig. 7 is the frame schematic diagram of the water purifier of the present invention;

FIG. 8 is a schematic structural diagram of a device having a storage function according to the present invention.

Water purifier 100, water pump 10, first reverse osmosis filter element 21, second reverse osmosis filter element 23, front reverse osmosis filter element 25, rear reverse osmosis filter element 27, first sensor 31, second sensor 33, third sensor 35 , the fourth sensor 37, the pure water port 40, the waste water port 50, the first waste water solenoid valve 61, the second waste water solenoid valve 62, the first normally closed solenoid valve 71, the second normally closed solenoid valve 72, the third normally closed solenoid valve Valve 73 , first switch 81 , second switch 82 , first check valve 91 , second check valve 92 .

【detailed description】

The solutions of the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

In the following description, for purposes of illustration and not limitation, specific details such as specific system structures, interfaces, techniques, etc. are set forth in order to provide a thorough understanding of the present application.

The terms "system" and "network" are often used interchangeably herein. The term "and/or" in this article is only an association relationship to describe the associated objects, indicating that there can be three kinds of relationships, for example, A and/or B, it can mean that A exists alone, A and B exist at the same time, and A and B exist independently B these three cases. In addition, the character "/" in this document generally indicates that the related objects are an "or" relationship. Also, "multiple" herein means two or more than two.

Referring to FIGS. 1-3 , the present invention provides a water purifier 100 . The water purifier 100 includes a water pump 10 , a first reverse osmosis filter element 21 and a second reverse osmosis filter element 23 .

Specifically, the waste water end of the first reverse osmosis filter element 21 is connected to the waste water port 50, the pure water end of the first reverse osmosis filter element 21 is connected to the pure water port 40; the raw water end of the second reverse osmosis filter element 23 is connected to the water pump 10, and the second reverse osmosis filter element 23 is connected to the water pump 10. The waste water end of the filter element 23 is connected to the waste water port 50 , and the pure water end of the second reverse osmosis filter element 23 is connected to the pure water port 40 ;

In an optional embodiment, a first waste water solenoid valve 61 is provided between the waste water end of the first reverse osmosis filter element 21 and the waste water port 50 , and a first waste water solenoid valve 61 is arranged between the waste water end of the second reverse osmosis filter element 23 and the waste water port 50 . Two waste water solenoid valve 62 . Among them, the first waste water solenoid valve 61 and the second waste water solenoid valve 62 are both adjustable valves, and both are provided with drainage holes. When the first waste water solenoid valve 61 and the second waste water solenoid valve 62 are not energized, the drainage holes are used to maintain pressure to discharge waste water. When the first waste water solenoid valve 61 and the second waste water solenoid valve 62 are energized, the first waste water solenoid valve 61 and the second waste water solenoid valve 62 are opened to the maximum to discharge waste water. In this way, by setting the first waste water solenoid valve 61 and the second waste water solenoid valve 62 to discharge a variable amount of water, the stability of the system can be ensured.

Alternatively, the water pump 10 may be a booster pump, and may be a variable power pump. In this way, the power of the water pump 10 to supply one reverse osmosis filter element or multiple reverse osmosis filter elements can be adjusted to ensure the stability of the system.

It should be noted that, in this embodiment, the pure water port 40 of the first reverse osmosis filter element 21 and the pure water port 40 of the second reverse osmosis filter element 23 may be shared, or corresponding pure water ports 40 may be provided respectively. The waste water port 50 of the first reverse osmosis filter element 21 and the waste water port 50 of the second reverse osmosis filter element 23 may be shared, or corresponding waste water ports 50 may be provided respectively, which are not specifically limited in the present invention.

In addition, in order to control the conduction or cut-off of each water circuit, a first normally closed solenoid valve 71 is connected between the raw water end of the first reverse osmosis filter element 21 and the water outlet of the water pump 10, and the raw water end of the second reverse osmosis filter element 23 and the water pump are connected The water outlet of 10 is directly connected. A first switch 81 is provided between the pure water end of the first reverse osmosis filter element 21 and the pure water port 40 to control the on-off of the water path between the pure water end of the first reverse osmosis filter element 21 and the pure water port 40; the second A second switch 82 is provided between the pure water end of the reverse osmosis filter element 23 and the pure water port 40 to control the on-off of the water path between the pure water end of the second reverse osmosis filter element 23 and the pure water port 40 . Specifically, the first switch 81 and the second switch 82 may be normally closed solenoid valves, when the power is turned on, the water path is turned on, and when the power is turned off, the water path is cut off. Of course, in other embodiments, the first switch 81 and the second switch 82 may also be other types of switches, which are not limited herein.

It should be noted that, in other embodiments, the number of reverse osmosis filter elements of the water purifier 100 may also be three or more, for example, when the number of reverse osmosis filter elements of the water purifier 100 is three, the number of The pure water ends of the two reverse osmosis filter elements are connected to the raw water end of the first reverse osmosis filter element to replace the waste water of the first reverse osmosis filter element 21 with the pure water passing through the second reverse osmosis filter element; The pure water end is connected to the raw water end of the second reverse osmosis filter element, so that the pure water passing through the third reverse osmosis filter element can replace the waste water of the second reverse osmosis filter element 23 .

Further, in order to control the water path of the pure water end of the second reverse osmosis filter element 23 and the raw water end of the first reverse osmosis filter element 21, the pure water end of the second reverse osmosis filter element 23 and the raw water end of the first reverse osmosis filter element 21 are separated. A second normally-closed solenoid valve 72 and a first one-way valve 91 are arranged therebetween, and the first one-way valve 91 conducts in the direction from the second reverse osmosis filter element 23 to the first reverse osmosis filter element 21 . The arrangement of the first one-way valve 91 can ensure one-way flow of pure water, thereby improving the stability of the system.

As shown in FIGS. 1-2 , in this embodiment, the pure water end of the second reverse osmosis filter element 23 is connected to the waste water port 50 . Specifically, a third normally closed solenoid valve 73 and a second one-way valve 92 are provided between the pure water end of the second reverse osmosis filter element 23 and the waste water port 50 , and the second one-way valve 92 is located in the second reverse osmosis filter element 23 Conduction to the waste water port 50 . The arrangement of the second one-way valve 92 can ensure one-way flow of pure water, thereby improving the stability of the system.

Further, in order to detect the water quality state, the water purifier 100 further includes a first sensor 31 and a second sensor 33 . The first sensor 31 is connected before the water inlet of the water pump 10 to detect the ion concentration value. The second sensor 33 is connected between the pure water end of the first reverse osmosis filter element 21 and the pure water end of the second reverse osmosis filter element 23 and the pure water port 40 for detecting the ion concentration value. Specifically, the first sensor 31 is used to detect the ion concentration value in the raw water, and the second sensor 33 is used to detect the ion concentration value in the pure water, so as to pass the difference between the ion concentration value in the raw water and the ion concentration value in the pure water. The proportional relationship adjusts the flushing time and flushing cycle of the first reverse osmosis filter element 21 and the second reverse osmosis filter element 23 by the water purifier 100 .

Moreover, in another embodiment shown in FIG. 2 , the water purifier 100 further includes a third sensor 35 and a fourth sensor 37 . The third sensor 35 is connected between the waste water end of the first reverse osmosis filter element 21 and the waste water port 50 for detecting the ion concentration value; the fourth sensor 37 is connected between the waste water end of the second reverse osmosis filter element 23 and the waste water port 50 time, used to detect the ion concentration.

Specifically, the third sensor 35 is used to detect the ion concentration value in the wastewater discharged through the first reverse osmosis filter element 21, the fourth sensor 37 is used to detect the ion concentration value in the wastewater discharged through the second reverse osmosis filter element 23, The first reverse osmosis filter element 21 and the second reverse osmosis filter element 21 are controlled according to the magnitude of the ion concentration value in the concentrated water discharged through the first reverse osmosis filter element 21 or the second reverse osmosis filter element 23, combined with the joint action of the first sensor 31 and the second sensor 33. The flushing time of the reverse osmosis filter element 23.

Of course, in other embodiments of the present invention, only the third sensor 35 and the fourth sensor 37 may be provided, so as to control the first reverse osmosis by detecting the water quality change of the third sensor 35 or the fourth sensor 37 within a unit time The flushing time of the filter element 21 and the second reverse osmosis filter element 23 .

As shown in FIGS. 1 to 3 , the water purifier 100 further includes a front reverse osmosis filter element 25 and a rear reverse osmosis filter element 27 . The front reverse osmosis filter element 25 is arranged before the water inlet of the water pump 10 , and the rear reverse osmosis filter element 27 is arranged between the pure water end and the pure water port 40 of the first reverse osmosis filter element 21 and the second reverse osmosis filter element 23 .

Optionally, in a specific embodiment, a pre-reverse osmosis filter element 25 can be set to roughly filter the sediment, rust, colloid, etc. in the raw water, and remove residual chlorine and most of the organic matter to improve the first Filtration effect and service life of the reverse osmosis filter element 21 and the second reverse osmosis filter element 23 . A rear reverse osmosis filter element 27 may be provided for further processing the pure water produced by the filtration of the first reverse osmosis filter element 21 and the second reverse osmosis filter element 23, so as to remove odor and improve drinking taste.

Based on the above water purifier 100, please refer to FIGS. 4-5, the present invention also provides a flushing method for the water purifier 100, the flushing method includes:

S11: Receive a stop command.

The working state of the water purifier 100 is mainly divided into two types, one is the water intake state, and the other is the non-water intake state. Receiving the stop instruction means that the water purifier 100 is in the non-water intake and water production state at this time. Specifically, based on the above water purifier 100, in one embodiment, the specific working process of the normal water intake state is as follows: raw water enters the water inlet of the water pump 10, at this time the water pump 10 starts to pressurize, the first normally closed solenoid valve 71 is opened, The first switch 81 and the second switch 82 are turned on, the first reverse osmosis filter element 21 and the second reverse osmosis filter element 23 produce water normally, and the pure water generated by the first reverse osmosis filter element 21 passes through the first switch 81 and is combined with the second reverse osmosis filter element. The pure water produced in 23 passes through the second switch 82 and then joins, and is discharged through the pure water port 40 . The waste water generated by the first reverse osmosis filter element 21 passes through the first waste water solenoid valve 61 and the waste water generated by the second reverse osmosis filter element 23 passes through the second waste water solenoid valve 62 and merges, and is discharged through the waste water port 50 .

S12: In response to the stop instruction, run in the first flushing mode for the first time; the first flushing mode includes: conducting the water pump 10 and the raw water end of the second reverse osmosis filter element 23, the waste water end and the waste water port of the second reverse osmosis filter element 23 50; Replace the waste water of the first reverse osmosis filter element 21 with the pure water of the second reverse osmosis filter element 23.

Specifically, when the water purifier 100 is in the state of stopping water production, the first switch 81 and the second switch 82 are closed to block the discharge of pure water from the pure water port 40 , and the first flushing mode is started at this time. The specific working process of the first flushing mode is as follows: the water pump 10 continues to run, the first normally closed solenoid valve 71 is closed, the second normally closed solenoid valve 72 is opened, the second reverse osmosis filter element 23 produces water normally, and the second reverse osmosis filter element 23 filters The generated pure water flows into the raw water end of the first reverse osmosis filter element 21 through the first one-way valve 91 and the second normally closed solenoid valve 72, and all the waste water of the first reverse osmosis filter element 21 is replaced with pure water, and then the first reverse osmosis filter element 21 is replaced with pure water. The waste water of the filter element 21 is discharged from the waste water port 50 through the first waste water solenoid valve 61 . As a result, the ion concentration value of the concentrated water before the membrane of the first reverse osmosis filter element 21 is reduced, and the ion concentration value of the concentrated water before the membrane is prevented from being too high and transferred to the pure water end.

S13: run in the second flushing mode for the second time; the second flushing mode includes: conducting the water pump 10 and the raw water end of the second reverse osmosis filter element 23, the waste water end of the second reverse osmosis filter element 23 and the waste water port 50; The raw water replaces the waste water of the second reverse osmosis filter element 23 .

Specifically, the working process of the second flushing mode is as follows: the second switch 82 is closed, the pure water of the second reverse osmosis filter element 23 is blocked from being discharged from the pure water port 40, and the water pump 10 does not perform pressurization work, that is, the second reverse osmosis filter element 23 is not filtered, and the raw water entering the water inlet of the water pump 10 replaces the concentrated water before the membrane of the second reverse osmosis filter element 23 into raw water, and then directly discharges from the waste water outlet 50 through the second waste water solenoid valve 62 . Therefore, since no filtering is performed in the working process of the second flushing mode, the noise is relatively small.

Of course, in other embodiments of the present invention, the water pump 10 can also perform pressurization work, that is, the second reverse osmosis filter element 23 performs filtration, and the second one-way valve 92 and the third normally closed solenoid valve 73 are opened. 10 The raw water entering the water inlet is filtered by the second reverse osmosis filter element 23 and divided into pure water and waste water. The waste water solenoid valve 62 discharges the waste water port 50, and also achieves the effect of replacing the concentrated water before the membrane of the second reverse osmosis filter element 23 with raw water. Thereby, the ion concentration value of the concentrated water before the membrane of the second reverse osmosis filter element 23 is reduced, and the ion concentration value of the concentrated water before the membrane is prevented from being too high and transferred to the pure water end.

It should be noted that, in this embodiment, the flushing method adopted is to run in the second flushing mode for a second time after running in the first flushing mode for a first time. Of course, in other embodiments of the present invention, only the first flushing mode or only the second flushing mode may be performed according to actual conditions such as water intake, water usage time or standing time. In addition, the first flushing mode and the second flushing mode may be operated continuously or discontinuously.

In a further embodiment, the above-mentioned flushing method also includes:

S14: Receive start command;

Receiving the start instruction means that the water purifier 100 is in the water intake state at this time, and the user needs to access the water in the water purifier 100 .

S15: In response to the start instruction, run the third flushing mode for a third time; the third flushing mode includes: conducting the water pump 10 and the raw water end of the first reverse osmosis filter element 21, the pure water end of the first reverse osmosis filter element 21 and the pure water end of the first reverse osmosis filter element 21. The water port 40 ; conducts the water pump 10 and the raw water end of the second reverse osmosis filter element 23 , the pure water end of the second reverse osmosis filter element 23 and the waste water port 50 .

In another embodiment, when the water purifier 100 is in the water intake state, that is, in response to the start instruction, the water purifier 100 performs the third flushing mode. The specific working process of the third flushing mode is as follows: when the user draws water, the raw water enters the water inlet of the water pump 10, at this time the water pump 10 starts to pressurize, the first normally closed solenoid valve 71 and the third normally closed solenoid valve 73 are opened, and the first normally closed solenoid valve 71 and the third normally closed solenoid valve 73 are opened. The switch 81 is opened, the second switch 82 is closed, the first reverse osmosis filter element 21 and the second reverse osmosis filter element 23 produce water normally, and the pure water generated by the first reverse osmosis filter element 21 passes through the first switch 81 and is discharged from the pure water port 40, The pure water generated by the first reverse osmosis filter element 21 is discharged from the waste water port 50 after passing through the first waste water solenoid valve 61 , and the waste water generated by the first reverse osmosis filter element 21 is discharged from the waste water port 50 after passing through the first waste water solenoid valve 61 . The pure water produced by the second reverse osmosis filter element 23 passes through the second one-way valve 92 and the third normally closed solenoid valve 73 and then is discharged through the waste water port 50 .

Further, when the water purifier 100 works in the third flushing mode for a period of time, the third normally closed solenoid valve 73 is closed, and the second switch 82 is opened, and the rest remain unchanged. At this time, the first reverse osmosis filter element 21 and the second reverse osmosis filter The pure water produced by the permeation filter element 23 is normally supplied to the user through the pure water inlet 40, that is, the water purifier 100 enters the normal water intake state described above. In this way, the pure water in the pure water end of the second reverse osmosis filter element 23 can be discharged through the waste water port 50 after being polluted by the raw water, so as to reduce the ion concentration value in the first cup of water.

In one embodiment, after the first flushing mode and the second flushing mode are completed, the shutdown state is entered. Optionally, when the start instruction is received, the water purifier 100 may directly enter the above-mentioned normal water intake state, or may first perform the third flushing mode, and then enter the above-mentioned normal water intake state.

In another embodiment, during the flushing process of the first flushing mode and the second flushing mode, if a start instruction is received, the water purifier 100 may directly enter the third flushing mode first, and then enter the normal operation described above. The water intake state; or it can directly enter the water intake state described above.

It can be understood that, in an embodiment of the present invention, as shown in FIG. 6 , the water purifier 100 is in a normal water intake state first, and then after the water intake is completed, a stop command is input; the water purifier 100 first performs the first flushing mode, After the completion of the second flushing mode, the water purifier 100 enters the shutdown state of the whole machine after the second flushing mode is completed; after the start command is input, that is, when the user needs to take water, the third flushing mode is performed first, and then continues to enter the normal state. water status.

Of course, in other embodiments of the present invention, the first flushing mode, the second flushing mode and the third flushing mode mentioned above do not all need to be completely performed as in the previous embodiment every time, and one of them may be selectively performed. Rinse mode or two rinse modes, which can be adjusted according to actual conditions such as water intake, water use time or standing time.

In addition, in an embodiment of the present invention, the first time of the first flushing mode, the second time of the second flushing mode, and the third time of the third flushing mode may be run for a fixed time, for example, the first time is 1 min , the second time is 1min, and the third time is 10s. Of course, in other embodiments of the present invention, the first time, the second time, and the third time may also be other fixed times, which may be adjusted according to actual usage conditions, which are not limited here.

In another embodiment, the first time, the second time, and the third time may also be adaptive flushing times, and the following will describe in detail the manner of the adaptive flushing time:

In one embodiment, in order to determine the first time of the first flushing mode, the flushing method provided by the present invention further includes: during the operation in the third flushing mode, detecting and obtaining the first water quality state value of the water inlet of the water pump 10, and the second water quality state value of the pure water inlet 40; according to the comparison result of the first water quality state value and the second water quality state value, the first time is updated.

Specifically, according to the comparison result between the first water quality state value and the second water quality state value, updating the first time includes: determining that the ratio of the second water quality state value to the first water quality state value is greater than a threshold, then increasing the first time by the unit time.

The first water quality state value is collected by the first sensor 31 , and the second water quality state value is collected by the second sensor 33 . For example, assuming that the first time is x, after the first flushing mode is completed, the start command is received and the third flushing mode is entered. During the third flushing mode, the first sensor 31 acquires the first water quality state value j, The second sensor 33 acquires the second water quality state value k. The water purifier 100 compares j and k. If k/j<0.1, it is considered that the first time x at this time can satisfy the flushing effect, and the first time x remains unchanged; on the contrary, if k/j>0.1 , then it is considered that the first time x at this time cannot satisfy the flushing effect, and the unit time n is added on the basis of the first time x, and when the first flushing mode is performed next time, the first time is x+n. Thus, the first time is updated through continuous loop detection.

It should be noted that, in the above embodiment, the threshold is set to 0.1. Of course, in other embodiments of the present invention, the threshold may also be set to other values according to actual usage conditions, which are not limited here.

Similarly, in order to determine the second time of the second flushing mode, the flushing method provided by the present invention further includes: after running in the third flushing mode for a third time, detecting and obtaining the third water quality state value of the water inlet of the water pump 10, and the pure water The fourth water quality state value of the mouth 40; according to the comparison result of the third water quality state value and the fourth water quality state value, the second time and the third time are updated.

Specifically, according to the comparison result of the third water quality state value and the fourth water quality state value, updating the second time and the third time includes: determining that the ratio of the fourth water quality state value to the third water quality state value is greater than a threshold, then changing the Both the second time and the third time increase the unit time.

The third water quality state value is collected by the first sensor 31 , and the second water quality state value is collected by the second sensor 33 . Assuming that the second time is x' and the third time is y', after the second flushing mode is completed, the start command is received and the normal water intake state is entered. The first sensor 31 acquires the third water quality state value j', and the second sensor 33 acquires the fourth water quality state value k'. The water purifier 100 compares j' and k', and if k'/j'<0.1, it is considered that the second time x' and the third time y' can satisfy the flushing effect, then the second time x' and the third time y' remain unchanged; on the contrary, if k'/j'>0.1, it is considered that the second time x' and the third time y' at this time cannot satisfy the flushing effect, then at the second time x' The unit time n is increased on the basis, and the unit time n is increased on the basis of the third time y'. When the second flushing mode and the third flushing mode are performed next time, the second time is x'+n, and the third time is y'+n. Thus, the second time and the third time are updated by continuously cyclic detection.

Likewise, it should be noted that, in the above embodiment, the threshold is set to 0.1. Of course, in other embodiments of the present invention, the threshold may also be set to other values according to actual usage conditions, which are not limited here.

In another embodiment, the first time and the second time may also be jointly determined by the first sensor 31, the second sensor 33, the third sensor 35 and the fourth sensor 37, and the flushing method includes: running in the first flushing mode In the process, the fifth water quality state value of the waste water end of the first reverse osmosis filter element 21 and the sixth water quality state value of the pure water inlet 40 are detected and obtained; according to the comparison result of the fifth water quality state value and the sixth water quality state value, the first During the operation in the second flushing mode, the seventh water quality state value of the waste water end of the second reverse osmosis filter element 23 and the eighth water quality state value of the water inlet of the water pump 10 are detected and obtained. According to the seventh water quality state value and the eighth water quality state value The comparison result of the water quality status value is updated at the second time.

For example, if the ratio of the fifth water quality state value to the sixth water quality state value is less than or equal to 1.1, it is considered that the first time at this time can satisfy the flushing effect, and the first time remains unchanged; on the contrary, if the fifth water quality state value and the If the ratio of the sixth water quality state value is greater than 1.1, it is considered that the first time cannot satisfy the flushing effect, and the unit time n is increased on the basis of the first time, and the others are the same as the previous embodiment. Similarly, if the ratio of the seventh water quality state value to the eighth water quality state value is less than 1.1, it is considered that the second time satisfies the flushing effect at this time, and the second time remains unchanged; on the contrary, if the seventh water quality state value and the eighth water quality state value are equal. If the ratio of the water quality state value is greater than 1.1, it is considered that the second time cannot satisfy the flushing effect, and the unit time n is increased on the basis of the second time, and the others are the same as the previous embodiment.

Of course, in other embodiments of the present invention, the third sensor 35 and the fourth sensor 37 can also be directly used to determine the change of the water quality state value within a certain period of time to determine the flushing effect, and then determine the flushing time, which can also achieve the purpose of the present invention. , so it also falls within the protection scope of the present invention.

It should be noted that the above-mentioned first water quality state value, second water quality state value, third water quality state value, fourth water quality state value, fifth water quality state value, sixth water quality state value, seventh water quality state value, and eighth water quality state value The water quality status values are all ion concentration values. In a specific embodiment, the first water quality state value, the second water quality state value, the third water quality state value, the fourth water quality state value, the fifth water quality state value, the sixth water quality state value, the seventh water quality state value, the Eight water quality state value can be PH value, hardness value and so on.

7, the present invention also provides a water purifier 100, including a processor 41, a memory 42 and a communication circuit 43, the processor 41 is respectively coupled to the memory 42 and the communication circuit 43, and the processor 41, the memory 42 and The flushing method in any of the above embodiments can be implemented when the communication circuit 43 is in operation.

Specifically, the processor 41 is used to control itself and the memory 42 to implement the steps in any of the above flushing method embodiments. The processor 41 may also be referred to as a CPU (Central Processing Unit, central processing unit). The processor 41 may be an integrated circuit chip with signal processing capability. The processor 41 may also be a general-purpose processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field-Programmable Gate Array, FPGA) or other Programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. In addition, the processor 41 may be jointly implemented by a plurality of integrated circuit chips.

In addition, referring to FIG. 8 , the present invention also provides a device with a storage function. The storage device 60 stores program instructions 600 that can be run by a processor, and the program instructions 600 are used to implement the test in any of the above embodiments. warm method. That is, when the above temperature measurement method is implemented in the form of software and sold or used as an independent product, it can be stored in a storage device 60 readable by an electronic device.

In the several embodiments provided in this application, it should be understood that the disclosed method and apparatus may be implemented in other manners. For example, the apparatus implementations described above are only illustrative, for example, the division of modules or units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored, or not implemented. On the other hand, the shown or discussed mutual coupling or direct coupling or communication connection may be through some interfaces, indirect coupling or communication connection of devices or units, which may be in electrical, mechanical or other forms.

Units described as separate components may or may not be physically separated, and components shown as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution in this implementation manner.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically alone, or two or more units may be integrated into one unit. The above-mentioned integrated units may be implemented in the form of hardware, or may be implemented in the form of software functional units.

The integrated unit, if implemented as a software functional unit and sold or used as a stand-alone product, may be stored in a computer-readable storage medium. Based on this understanding, the technical solutions of the present application can be embodied in the form of software products in essence, or the parts that contribute to the prior art, or all or part of the technical solutions, and the computer software products are stored in a storage medium , including several instructions to make a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the methods of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, Read-Only Memory (ROM, Read-Only Memory), Random Access Memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes .

The above description is only an embodiment of the present application, and is not intended to limit the scope of the patent of the present application. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present application, or directly or indirectly applied to other related technologies Fields are similarly included within the scope of patent protection of this application.

Claims

A washing method for a water purifier, characterized in that the water purifier comprises: a water pump; The end is connected to the waste water port, and the pure water end of the first reverse osmosis filter element is connected to the pure water port; the second reverse osmosis filter element, the raw water end of the second reverse osmosis filter element is connected to the water pump, and the waste water end of the second reverse osmosis filter element is connected to In the waste water port, the pure water end of the second reverse osmosis filter element is connected to the pure water port; the pure water end of the second reverse osmosis filter element is connected to the raw water end of the first reverse osmosis filter element; the flushing method includes: :

receive a stop order;

In response to the stop instruction, the first flushing mode is operated for the first time; the first flushing mode includes: turning on the water pump and the raw water end of the second reverse osmosis filter element, the waste water end and the waste water port of the second reverse osmosis filter element, The pure water end of the second reverse osmosis filter element and the raw water end of the first reverse osmosis filter element, the waste water end and the waste water port of the first reverse osmosis filter element; the pure water passing through the second reverse osmosis filter element replaces the waste water of the first reverse osmosis filter element ;

Running in the second flushing mode for a second time; the second flushing mode includes: conducting the water pump and the raw water end of the second reverse osmosis filter element, the waste water end and the waste water port of the second reverse osmosis filter element; replacing the raw water by the water pump The waste water of the second reverse osmosis filter element.
The flushing method according to claim 1, wherein the pure water end of the second reverse osmosis filter element is connected to the waste water port; the flushing method further comprises:

receive a start command;

In response to the start instruction, a third flushing mode is run for a third time; the third flushing mode includes: conducting the water pump and the raw water end of the first reverse osmosis filter element, the pure water end of the first reverse osmosis filter element and the The pure water port is connected to the raw water end of the water pump and the second reverse osmosis filter element, and the pure water end of the second reverse osmosis filter element and the waste water port.
The flushing method according to claim 1, wherein after running in the first flushing mode for a first time, the second flushing mode is run for a second time.
The flushing method according to claim 2, wherein the flushing method further comprises:

In the process of running in the third flushing mode, the first water quality state value of the water inlet of the water pump and the second water quality state value of the pure water inlet are obtained by detecting;

The first time is updated according to the comparison result between the first water quality state value and the second water quality state value.
The flushing method according to claim 4, wherein the updating of the first time according to the comparison result of the first water quality state value and the second water quality state value comprises:

If it is determined that the ratio of the second water quality state value to the first water quality state value is greater than the threshold, the first time is increased by a unit time.
The flushing method according to claim 2, wherein the flushing method further comprises:

After running in the third flushing mode for a third time, the third water quality state value of the water inlet of the water pump and the fourth water quality state value of the pure water inlet are obtained by detecting;

The second time and the third time are updated according to the comparison result of the third water quality state value and the fourth water quality state value.
The flushing method according to claim 6, wherein the second time and the third time are updated according to the comparison result of the third water quality state value and the fourth water quality state value, include:

If it is determined that the ratio of the fourth water quality state value to the third water quality state value is greater than the threshold, the second time and the third time are both increased by a unit time.
The flushing method according to claim 1, wherein the flushing method further comprises:

During the operation in the first flushing mode, the fifth water quality state value of the waste water end of the first reverse osmosis filter element and the sixth water quality state value of the pure water outlet are obtained by detecting;

updating the first time according to the comparison result of the fifth water quality state value and the sixth water quality state value;

During the operation in the second flushing mode, the seventh water quality state value of the waste water end of the second reverse osmosis filter element and the eighth water quality state value of the water inlet of the water pump are detected and obtained;

The second time is updated according to the comparison result of the seventh water quality state value and the eighth water quality state value.
The flushing method according to any one of claims 4-8, wherein the water quality state value is an ion concentration value.
A water purifier is characterized by comprising: a processor, a memory and a communication circuit, wherein the processor is respectively coupled to the memory and the communication circuit; the processor, the memory and the communication circuit work The flushing method described in any one of claims 1-9 can be realized.
A device with a storage function, characterized in that the device stores program data, which can be executed to implement the flushing method according to any one of claims 1-9.