Control method for water purifier and water purifier

Abstract

This invention relates to the field of water purification equipment, specifically providing a control method and a water purifier for a water purifier, aiming to solve the problems of incomplete cleaning due to insufficient cleaning time or energy waste due to excessive cleaning time when cleaning reverse osmosis membrane filter elements in existing water purifiers. The invention provides a control method and a water purifier for a water purifier, which includes a reverse osmosis membrane filter element, a cleaning component, and a circulation pipeline. The inlet and wastewater ends of the cleaning component and the reverse osmosis membrane filter element are sequentially connected to form a cleaning loop. When the water purifier is in cleaning mode, the control method includes the following steps: acquiring water quality information within the cleaning loop; and selectively ending the cleaning mode of the water purifier based on the water quality information. This design avoids the problems of incomplete cleaning due to insufficient cleaning time or energy waste due to excessive cleaning time when cleaning reverse osmosis membrane filter elements in existing technologies, thus improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment, specifically providing a control method for a water purifier and a water purifier. Background Technology

[0002] In daily life, water purification equipment accumulates scale and other impurities inside the reverse osmosis membrane filter cartridge during long-term use. This affects the filtration rate and reduces the lifespan of the filter cartridge. Furthermore, using a reverse osmosis membrane filter cartridge with a large amount of scale will result in lower-quality purified water. Therefore, current technology typically uses cleaning agents to clean the reverse osmosis membrane filter cartridge.

[0003] In existing technologies, when cleaning reverse osmosis membrane filter cartridges, a fixed cleaning time is usually set. Since reverse osmosis membrane filter cartridges are used in areas with different water qualities, when used in areas with poor water quality, there is a problem of incomplete cleaning due to insufficient cleaning time. When used in areas with good water quality, there is a problem of energy waste due to excessive cleaning time, which leads to a poor user experience. Summary of the Invention

[0004] The present invention aims to solve the above-mentioned technical problems, namely, to solve the problems that existing water purifiers have incomplete cleaning due to too short a cleaning time or energy waste due to too long a cleaning time when cleaning reverse osmosis membrane filter elements.

[0005] In a first aspect, the present invention provides a control method for a water purifier, the water purifier including a reverse osmosis membrane filter, a cleaning component, and a circulation pipeline, the cleaning component having a cleaning agent storage member for storing cleaning agent, the cleaning component being capable of delivering cleaning liquid to the inlet end of the reverse osmosis membrane filter, a first end of the circulation pipeline being connected to the wastewater end of the reverse osmosis membrane filter, and a second end of the circulation pipeline being connected to the cleaning component, so that the cleaning component, the inlet end of the reverse osmosis membrane filter, and the wastewater end of the reverse osmosis membrane filter are sequentially connected to form a cleaning loop, wherein the water purifier has a cleaning mode, the water purifier being configured to allow the cleaning liquid to circulate within the cleaning loop when it is in the cleaning mode, and the control method including the following steps when the water purifier is in the cleaning mode: acquiring water quality information within the cleaning loop; and selectively terminating the cleaning mode of the water purifier based on the water quality information.

[0006] In the preferred embodiment of the control method for the water purifier described above, the step of "selectively ending the cleaning mode of the water purifier based on the water quality information" specifically includes: determining whether the water quality in the cleaning circuit changes within a preset time period based on the water quality information; and selectively ending the cleaning mode of the water purifier based on the determination result.

[0007] In the preferred embodiment of the control method for the water purifier described above, the step of "selectively ending the cleaning mode of the water purifier according to the judgment result" specifically includes: if the judgment result is "yes", then the water purifier is not ended in the cleaning mode; and / or, if the judgment result is "no", then the concentration parameter of the cleaning agent in the cleaning circuit is further obtained; based on the concentration parameter, it is further determined whether the cleaning agent in the cleaning circuit is sufficient; based on the further judgment result, the water purifier is selectively ended in the cleaning mode.

[0008] In the preferred embodiment of the control method for the water purifier described above, the step of "selectively ending the cleaning mode of the water purifier based on a further judgment result" specifically includes: if the judgment result is "yes", then ending the cleaning mode of the water purifier; and / or, if the judgment result is "no", then not ending the cleaning mode of the water purifier.

[0009] In the preferred embodiment of the control method for the water purifier described above, if the judgment result is "no", the water purifier adds cleaning agent into the cleaning circuit.

[0010] In the preferred embodiment of the control method for the water purifier described above, the cleaning agent is an acidic or alkaline cleaning agent, and the concentration parameter includes a pH value. The step of "obtaining the concentration parameter of the cleaning agent in the cleaning circuit" specifically includes: obtaining the current pH value of the cleaning solution in the cleaning circuit; the step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the concentration parameter" specifically includes: obtaining a preset pH value corresponding to the cleaning agent; and determining whether the cleaning agent in the cleaning circuit is sufficient based on the current pH value and the preset pH value.

[0011] In the preferred embodiment of the control method for the water purifier described above, the cleaning agent is an acidic cleaning agent, the current pH value is denoted as PH1, and the preset pH value is denoted as PHA; the step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the current pH value" specifically includes: calculating a first difference Δ1 = PH1 - PHA; comparing the first difference Δ1 with a first preset value A1; and determining whether the cleaning agent in the cleaning circuit is sufficient based on the comparison result; wherein, A1 ≥ 0; or, the cleaning agent is an alkaline cleaning agent, the current pH value is denoted as PH2, and the preset pH value is denoted as PHb; the step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the current pH value" specifically includes: calculating a second difference Δ2 = PH2 - PHb; comparing the second difference Δ2 with a second preset value A2; and determining whether the cleaning agent in the cleaning circuit is sufficient based on the comparison result; wherein, A2 ≤ 0.

[0012] In the preferred embodiment of the control method for the water purifier described above, the step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the comparison result" specifically includes: if △1 > A1, then the cleaning agent in the cleaning circuit is insufficient; and / or, if △1 ≤ A1, then the cleaning agent in the cleaning circuit is sufficient; or, if △2 > A2, then the cleaning agent in the cleaning circuit is sufficient; and / or, if △2 ≤ A2, then the cleaning agent in the cleaning circuit is insufficient.

[0013] In the preferred embodiment of the control method for the water purifier described above, the water quality information includes at least one of turbidity value or TDS value.

[0014] In a second aspect, the present invention provides a water purifier, the water purifier including a controller configured to perform any of the control methods described above for the water purifier.

[0015] When using the above-described control method for water purifiers, the present invention can determine whether the cleaning of the reverse osmosis membrane filter element has been completed based on the water quality information in the cleaning circuit, thereby selectively stopping the water purifier from cleaning mode. This avoids the waste of resources caused by either insufficient cleaning due to a fixed cleaning time or excessive cleaning time, as is the case in the prior art, thus improving the user experience.

[0016] Furthermore, based on water quality information, it is determined whether the water quality in the cleaning loop has changed within a preset time. If the result is "yes," the cleaning mode is not stopped. If the result is "no," it is further determined whether the cleaning agent in the cleaning loop is sufficient, and then the cleaning mode is selectively stopped. This avoids the water quality information ceasing to change due to insufficient cleaning agent, ensuring thorough cleaning of the reverse osmosis membrane filter element. Attached Figure Description

[0017] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0018] Figure 1 This is a flowchart of the control method for a water purifier according to the present invention;

[0019] Figure 2 This is a flowchart of an embodiment of the control method for a water purifier according to the present invention;

[0020] Figure 3 This is a schematic diagram of the structure of the water purifier provided in Embodiment 1 of the present invention;

[0021] Figure 4 This is a schematic diagram of the water purifier provided in Embodiment 2 of the present invention.

[0022] List of reference numerals in the attached diagram:

[0023] 10. Reverse osmosis membrane filter element; 21. Detergent storage component; 22. Cleaning pipeline; 23. Cleaning valve; 24. Manifold; 25. First check valve; 26. Second check valve; 31. Circulation pipeline; 32. Circulation pump; 40. Water quality testing component; 50. Main inlet water line; 61. Booster pump; 62. Inlet water valve; 63. Pre-filter unit; 64. Pure water outlet pipe; 65. Pure water usage component; 71. Wastewater pipe; 72. Wastewater valve; 81. Pure water testing component; 82. Wastewater testing component; 83. Inlet water testing component. Detailed Implementation

[0024] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0025] It should be noted that in the description of this invention, terms such as "upper," "lower," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] Based on the problems mentioned in the background art regarding existing water purifiers, such as incomplete cleaning due to insufficient cleaning time or energy waste due to excessive cleaning time when cleaning the reverse osmosis membrane filter element 10, this invention provides a control method for a water purifier. The water purifier has a cleaning circuit. When the water purifier is in cleaning mode, this control method can acquire water quality information in the cleaning circuit of the water purifier and selectively end the cleaning mode of the water purifier according to the water quality information. This achieves the goal of ending the cleaning mode after the water purifier has finished cleaning, avoiding incomplete cleaning due to insufficient cleaning time or resource waste due to excessive cleaning time, and greatly improving the user experience.

[0028] For details, please refer to Figure 1 , Figure 1 This is a flowchart of the control method for a water purifier according to the present invention.

[0029] like Figure 1 As shown, the present invention provides a control method for a water purifier. The water purifier of the present invention includes a reverse osmosis membrane filter element 10, a cleaning component, and a circulation pipeline 31. The cleaning component has a cleaning agent storage member 21 for storing cleaning agent. The cleaning component can deliver cleaning liquid to the inlet end of the reverse osmosis membrane filter element 10. The first end of the circulation pipeline 31 is connected to the wastewater end of the reverse osmosis membrane filter element 10, and the second end of the circulation pipeline 31 is connected to the cleaning component, so that the cleaning component, the inlet end of the reverse osmosis membrane filter element 10, and the wastewater end of the reverse osmosis membrane filter element 10 are sequentially connected to form a cleaning circuit.

[0030] The water purifier has a cleaning mode, which is configured to circulate the cleaning solution within the cleaning circuit when in cleaning mode. The control method for the water purifier in cleaning mode includes the following steps:

[0031] S1: Obtain water quality information within the cleaning loop;

[0032] S2: Based on water quality information, selectively end the cleaning mode of the water purifier.

[0033] With this setting, the system can determine whether dirt on the reverse osmosis membrane filter 10 should continue to enter the cleaning circuit based on the water quality information in the cleaning circuit of the water purifier. This allows the system to determine whether it is necessary to continue cleaning the reverse osmosis membrane filter 10 and selectively end the cleaning mode. As a result, the water purifier ends the cleaning mode in a timely manner after the dirt on the reverse osmosis membrane filter 10 has been cleaned, achieving precise control of the water purifier. This avoids incomplete cleaning due to too short a cleaning time or resource waste due to too long a cleaning time, greatly improving the user experience.

[0034] Preferably, the water purifier of the present invention further includes a main water inlet 50 and an inlet valve 62. The main water inlet 50 is connected to the inlet end of the reverse osmosis membrane filter element 10. The cleaning component has a cleaning pipe 22. The two ends of the cleaning pipe 22 form a cleaning inlet and a cleaning outlet, respectively. The cleaning inlet is connected to the main water inlet 50 so that water in the main water inlet 50 can enter the cleaning agent storage component 21 through the cleaning inlet to form a cleaning liquid. The cleaning outlet is connected to the main water inlet 50 so that the cleaning liquid can be transported to the reverse osmosis membrane filter element 10 through the cleaning outlet so that the cleaning liquid can clean the reverse osmosis membrane filter element 10. The second end of the circulation pipe 31 is connected to the cleaning pipe 22. The inlet valve 62 is disposed in the main water inlet 50, and the cleaning outlet is located at the downstream end of the inlet valve 62.

[0035] It should be noted that in practical applications, the cleaning outlet is not limited to being connected to the main inlet water line 50, with the cleaning component conveying the cleaning solution to the reverse osmosis membrane filter element 10 via the main inlet water line 50. For example, the reverse osmosis membrane filter element 10 can be configured to have two inlet ends, which are respectively connected to the main inlet water line 50 and the cleaning pipeline, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention. Of course, preferably, the cleaning outlet is connected to the main inlet water line 50, and the cleaning component conveys the cleaning solution to the reverse osmosis membrane filter element 10 via the main inlet water line 50.

[0036] It should be noted that, in practical applications, this invention does not limit the specific driving method for the water purifier to drive the cleaning liquid to circulate in the cleaning circuit. For example, a circulation pump 32 can be set on the cleaning circuit to drive the cleaning liquid to circulate in the cleaning circuit. Alternatively, the cleaning outlet of the cleaning component can be set to be connected to the inlet end of the reverse osmosis membrane filter element 10 through the main water inlet 50 of the water purifier, and the cleaning liquid in the cleaning circuit can be driven to circulate in the cleaning circuit through the booster pump on the main water inlet 50 (not shown in the figure), etc. Such flexible adjustments and changes do not deviate from the principle and scope of this invention and should be included within the protection scope of this invention.

[0037] Preferably, the water purifier further includes a circulation pump 32 and a booster pump 61. The booster pump 61 is installed on the main water inlet 50, and the cleaning outlet of the cleaning pipeline is located at the downstream end of the booster pump 61. The circulation pump 32 is installed in the cleaning circuit to drive the cleaning liquid in the cleaning circuit to circulate.

[0038] By using a circulating pump 32 to drive the cleaning fluid circulation in the cleaning circuit, compared to using a booster pump 61, the cleaning fluid can be prevented from entering the booster pump 61 and corroding its diaphragm, thus avoiding affecting its service life. Positioning the cleaning outlet downstream of the booster pump 61 further prevents the cleaning fluid from flowing through it, extending its service life. Furthermore, since the circulating pump 32 is less expensive than the booster pump 61, using a circulating pump 32 to drive the cleaning fluid circulation in the cleaning circuit is more cost-effective.

[0039] Such as 3 and Figure 4 As shown, in a specific embodiment of the present invention, the water purifier further includes a pre-filter unit 63, the outlet of the pre-filter unit 63 is connected to the main water inlet 50, and the cleaning inlet is located at the downstream end of the pre-filter unit 63.

[0040] By setting up a pre-filter unit 63, water can be initially filtered. The water filtered by the pre-filter unit 63 enters the reverse osmosis membrane filter element 10 through the main water inlet 50 for further filtration, which extends the service life of the reverse osmosis membrane filter element 10. At the same time, the cleaning inlet is set at the downstream end of the pre-filter unit 63 to avoid the cleaning liquid in the cleaning circuit from contaminating the pre-filter unit. Furthermore, the cleaning agent is dissolved in the water that has been initially filtered by the pre-filter unit 63 and used to clean the reverse osmosis membrane filter element 10, resulting in a better cleaning effect.

[0041] It should be noted that in practical applications, the cleaning inlet is not limited to being located downstream of the pre-filter unit 63. It can also be located upstream of the pre-filter unit 63. Such adjustments and changes to the specific locations of the cleaning inlet and the pre-filter unit 63 do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0042] It should also be noted that, in practical applications, those skilled in the art can configure the first end of the circulation pipe 31 to be directly connected to the wastewater end of the reverse osmosis membrane filter element 10, or the first end of the circulation pipe 31 can be configured to be connected to the wastewater end of the reverse osmosis membrane filter element 10 through the wastewater pipe 71 of the water purifier, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0043] Preferably, such as Figure 3and Figure 4 As shown, the water purifier also includes a wastewater pipe 71 and a wastewater valve 72 installed on the wastewater pipe 71. The wastewater pipe 71 is connected to the wastewater end of the reverse osmosis membrane filter element 10, and the first end of the circulation pipe 31 is connected to the wastewater pipe 71.

[0044] With this setup, when the water purifier is in normal water production mode, the wastewater produced by the reverse osmosis membrane filter 10 can be discharged through the wastewater pipe 71. When the self-cleaning component is in cleaning mode, the cleaning solution after cleaning the reverse osmosis membrane filter 10 can be discharged through the wastewater pipe 71. The wastewater valve 72 is used to adjust the ratio of pure water to wastewater when the reverse osmosis membrane filter 10 filters water.

[0045] It should be noted that, in practical applications, those skilled in the art can set the first end of the circulation pipe 31 to be located upstream of the wastewater valve 72, or the first end of the circulation pipe 31 to be located downstream of the wastewater valve 72, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0046] Preferably, the first end of the circulation pipe 31 is located upstream of the wastewater valve 72.

[0047] like Figure 3 and Figure 4 As shown, in an embodiment of the present invention, the water purifier further includes a pure water outlet pipe 64 and a pure water user component 65, and the pure water end of the reverse osmosis membrane filter element 10 is connected to the pure water user component 65 through the pure water outlet pipe 64.

[0048] With this setup, the pure water outlet pipe 64 can output the pure water produced by the reverse osmosis membrane filter cartridge 10 to the pure water user component 65 for user use.

[0049] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific configuration type of the pure water component 65, as long as it can output pure water from the reverse osmosis membrane filter 10 for user consumption. For example, the pure water component 65 can be configured as a pure water tank, with pure water filtered by the reverse osmosis membrane filter 10 directly delivered to the pure water tank for user consumption. Alternatively, the pure water component 65 can be configured as a post-filter, with pure water filtered by the reverse osmosis membrane filter 10 delivered to the post-filter to improve taste before being delivered to the user. Or, the pure water component 65 can be configured as a water outlet component (water spout or faucet), with pure water filtered by the reverse osmosis membrane filter 10 flowing directly from the water outlet component (water spout or faucet), etc. Such adjustments and changes to the specific configuration type of the pure water component 65 do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0050] Preferably, the pure water component 65 includes a post-filter cartridge, through which pure water filtered by the reverse osmosis membrane filter cartridge 10 is delivered to the post-filter cartridge to improve the taste before being supplied to the user for drinking.

[0051] like Figure 3 and Figure 4 As shown, in practical applications, the cleaning agent storage component 21 of the cleaning component can be used to store acidic or alkaline cleaning agents. The structure of the cleaning component is described in the following two embodiments.

[0052] Example 1:

[0053] The cleaning assembly includes a cleaning pipeline 22 and a cleaning valve 23 and a cleaning agent storage component 21 arranged sequentially on the cleaning pipeline 22. The cleaning agent storage component 21 is located downstream of the cleaning valve 23 and is used to store acidic or alkaline cleaning agents. A circulation pump 32 is arranged on the cleaning pipeline 22.

[0054] Understandably, the cleaning valve 23 is used to control the opening and closing of the cleaning pipeline 22. When the water purifier is in normal water production mode, the cleaning valve 23 cuts off the cleaning pipeline 22. When the water purifier cleans the reverse osmosis membrane filter element 10, the cleaning valve 23 opens, and the water in the main inlet 50 flows into the cleaning agent storage component 21 through the cleaning pipeline 22, dissolving the cleaning agent in the cleaning agent storage component 21 to form a cleaning liquid. The cleaning liquid flows out from the cleaning pipeline 22 and into the reverse osmosis membrane filter element 10.

[0055] Optionally, the cleaning agent can be a solid cleaning agent or a liquid cleaning agent, and an acidic cleaning agent or an alkaline cleaning agent can be selected according to the type of dirt on the reverse osmosis membrane filter element 10.

[0056] It should be noted that the circulation pump 32 is not limited to being installed on the cleaning pipeline 22. It can be installed at any possible location in the cleaning circuit. For example, it can be installed on the circulation pipeline 31, or on the main inlet water line 50 between the cleaning component and the reverse osmosis membrane filter element 10, etc. Such adjustments and changes to the specific location of the circulation pump 32 in the cleaning circuit do not deviate from the principles and scope of this invention and should be included within the protection scope of this invention. Preferably, the circulation pump 32 is installed on the cleaning pipeline 22.

[0057] Example 2:

[0058] The cleaning assembly includes a manifold 24, at least two parallel cleaning lines 22, a cleaning valve 23 on each cleaning line 22, and a cleaning agent storage component 21. The first ends of the multiple cleaning lines 22 converge and communicate with the cleaning inlet, and the second ends of the multiple cleaning lines 22 converge and communicate with the manifold 24. The end of the manifold 24 forms a cleaning outlet. The cleaning agent storage component 21 is located downstream of the cleaning valve 23. The cleaning agent storage component 21 on each cleaning line 22 is used to store different types of cleaning agents. A circulation pump 32 is provided on the manifold 24.

[0059] With this configuration, the cleaning agent storage component 21 of each cleaning pipeline 22 can store cleaning agent. Those skilled in the art can select a suitable cleaning agent according to the type of fouling on the reverse osmosis membrane filter element 10, and selectively open the cleaning valve 23 on the cleaning pipeline 22. The second end of the multiple cleaning pipelines 22 is connected to the manifold 24, so that the cleaning liquid in the cleaning pipeline 22 enters the cleaning outlet along the manifold 24 and then enters the reverse osmosis membrane filter element 10, thereby cleaning the reverse osmosis membrane filter element 10.

[0060] It should be noted that the circulation pump 32 is not limited to being installed on the manifold 24. It can be installed at any possible location in the cleaning circuit. For example, it can be installed on the circulation pipe 31, or on the main inlet water line 50 between the cleaning component and the reverse osmosis membrane filter element 10, etc. Such adjustments and changes to the specific location of the circulation pump 32 in the cleaning circuit do not deviate from the principles and scope of this invention and should be included within the protection scope of this invention. Preferably, the circulation pump 32 is installed on the manifold 24.

[0061] Preferably, the cleaning component of the present invention further includes a first one-way valve 25, which is disposed between the cleaning outlet and the circulation pump 32 and is capable of resisting water pressure in the main water inlet 50.

[0062] Since the circulation pump 32 is not pressure resistant, when the water purifier is in normal water production mode, the first one-way valve 25 between the clean outlet and the circulation pump 32 can resist the high water pressure in the main water inlet 50, thus preventing the circulation pump 32 from leaking due to the high pressure in the main water inlet 50, and further improving the user experience.

[0063] Preferably, the cleaning assembly of the present invention further includes a second one-way valve 26, which is disposed on at least a portion of the cleaning line 22 and is capable of preventing liquid in the manifold 24 or the main water inlet 50 from flowing back into the cleaning agent storage member 21.

[0064] With this configuration, when the detergent in the detergent storage component 21 on one cleaning pipeline 22 is cleaning the reverse osmosis membrane filter element 10, the second check valve on the other cleaning pipelines 22 can prevent the liquid in the manifold 24 or the main inlet water line 50 from flowing back into the detergent storage component 21, thereby better protecting the detergent in the detergent storage component 21.

[0065] It should be noted that in practical applications, the second check valve 26 may be installed on only part of the cleaning pipeline 22, or the second check valve 26 may be installed on all the cleaning pipelines 22, etc. Such adjustments and changes to the specific installation of the second check valve 26 on the cleaning pipeline 22 do not deviate from the principle and scope of the present invention, and should all be included within the protection scope of the present invention.

[0066] Preferably, the second one-way valve 26 is installed on part of the cleaning pipeline 22, which can help reduce the cost of the water purifier.

[0067] It should be noted that the method is not limited to providing a second one-way valve 26 on the cleaning pipeline 22 to prevent liquid in the manifold 24 or the main water inlet 50 from flowing back into the detergent storage component 21. For example, a check valve structure can be provided in the detergent storage component 21 to prevent water in the manifold 24 from flowing back into the detergent storage component 21. Alternatively, a switch valve can be provided on the cleaning pipeline 22 to prevent water in the manifold 24 or the main water inlet 50 from flowing back into the detergent storage component 21, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0068] Preferably, the step of "selectively ending the cleaning mode of the water purifier based on water quality information" specifically includes:

[0069] S21: Based on water quality information, determine whether the water quality in the cleaning circuit changes within a preset time.

[0070] S22: Based on the judgment result, selectively end the cleaning mode of the water purifier.

[0071] With this setting, compared to the existing technology that sets a fixed cleaning time, the cleaning mode can be selectively ended based on whether the water quality information changes. This allows the cleaning mode to end after the reverse osmosis membrane filter element 10 is cleaned, effectively avoiding incomplete cleaning caused by abrupt cleaning time or resource waste caused by excessive cleaning time.

[0072] It should be noted that the method is not limited to selectively ending the cleaning mode of the water purifier by judging whether the water quality in the cleaning loop changes within a preset time. For example, it can also calculate the water quality change rate (the slope of the curve with water quality information on the vertical axis and time on the horizontal axis) based on the obtained water quality information in the cleaning loop, and selectively end the cleaning mode of the water purifier based on the water quality change rate, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention. Of course, preferably, the method involves judging whether the water quality in the cleaning loop changes within a preset time based on the water quality information, and selectively ending the cleaning mode of the water purifier based on the judgment result.

[0073] It should also be noted that in the control method for a water purifier of the present invention, it is sufficient to collect water quality information in the cleaning circuit, and no specific limitation is made on the method of obtaining water quality information. For example, those skilled in the art can collect water quality information in the cleaning circuit by setting a water quality detection component 40 in the cleaning circuit, or those skilled in the art can set a sampling pipeline in the cleaning circuit, the sampling pipeline samples the cleaning liquid in the cleaning circuit, and the water quality detection component 40 analyzes the sample of the cleaning liquid to obtain water quality information in the cleaning pipeline 22, etc. The methods and structures that can obtain water quality information in the cleaning circuit should be included within the protection scope of the present invention.

[0074] Preferably, the water purifier of the present invention further includes a water quality detection component 40, which is used to detect water quality information in the cleaning circuit.

[0075] By installing a water quality detection component 40 in the cleaning circuit, the water quality information in the cleaning circuit can be detected more conveniently and accurately.

[0076] It should be noted that, in practical applications, the present invention does not impose any limitations on the specific placement of the water quality detection component 40 in the cleaning circuit. For example, the water quality detection component 40 can be placed on the circulation pipe 31, or on the cleaning pipe 22, or on any other possible location in the cleaning circuit, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0077] Preferably, such as Figure 1 and Figure 2 As shown, the water quality detection component 40 is installed on the circulation pipeline 31.

[0078] Optionally, those skilled in the art can use any water quality detection component 40 capable of detecting water quality information in the cleaning loop. For example, the water quality detection component 40 can be a TDS sensor, which is a sensor that measures water quality by determining the content of total dissolved solids (TDS) in water. When the cleaning agent is sufficient, detecting whether the water quality continues to change through the TDS sensor can determine whether the reverse osmosis membrane filter element 10 has been cleaned. Alternatively, the water quality detection component 40 can be a turbidity sensor. Correspondingly, the water quality information in the cleaning pipeline 22 is the turbidity value in the cleaning pipeline 22. The turbidity sensor is used to detect the turbidity in the cleaning loop. When the turbidity in the cleaning loop no longer increases, it indicates that dirt in the reverse osmosis membrane filter element 10 is no longer entering the cleaning loop, thus determining that the reverse osmosis membrane filter element 10 has been cleaned, and so on. It should be noted that those skilled in the art can also use other sensors capable of determining whether the water quality information in the cleaning loop has changed, and are not limited to the two specific sensors listed.

[0079] Preferably, in step S22 above, the step of "selectively ending the cleaning mode of the water purifier based on the judgment result" specifically includes:

[0080] S221: If the judgment result is "yes", then the water purifier will not end the cleaning mode.

[0081] With this setting, if the judgment result is "yes", it means that the water quality information in the cleaning circuit is still changing, which means that dirt is still dissolving and entering the cleaning solution. This means that the reverse osmosis membrane filter element 10 has not been cleaned. Therefore, in this case, the water purifier is not turned off in the cleaning mode, and the reverse osmosis membrane filter element 10 can continue to be cleaned.

[0082] Preferably, in step S22 above, the step of "selectively ending the cleaning mode of the water purifier based on the judgment result" specifically includes:

[0083] S222: If the judgment result is "no", then further obtain the concentration parameter of the cleaning agent in the cleaning loop;

[0084] S223: Based on the concentration parameters, further determine whether the cleaning agent in the cleaning circuit is sufficient;

[0085] S224: Based on further judgment results, selectively terminate the cleaning mode of the water purifier.

[0086] Understandably, when the water quality information in the cleaning loop no longer changes, it could be that the dirt on the reverse osmosis membrane filter element 10 has been completely cleaned and entered the cleaning loop, or it could be due to insufficient cleaning agent, which prevents the dirt on the reverse osmosis membrane filter element 10 from being effectively broken down. Therefore, when the water quality information in the cleaning loop no longer changes, it is necessary to further obtain the cleaning agent concentration parameter in the cleaning loop to determine whether the cleaning agent in the cleaning loop is sufficient, and to determine whether the cleaning mode needs to be terminated based on the cleaning agent concentration parameter in the cleaning loop.

[0087] It should be noted that in the control method for a water purifier of the present invention, those skilled in the art only need to be able to collect the cleaning agent concentration information in the cleaning circuit, and no specific limitation is made on the method of obtaining the cleaning agent concentration information. For example, the concentration parameter of the cleaning liquid can be obtained by obtaining the pH value information of the cleaning liquid, or the concentration parameter of the cleaning agent can be obtained by obtaining the concentration of the cleaning liquid, etc. Such adjustments and changes to the specific method of obtaining the concentration information of the cleaning agent do not deviate from the principle and scope of the present invention, and should all be included within the protection scope of the present invention.

[0088] Preferably, the concentration parameter of the cleaning solution is obtained by acquiring the pH value information of the cleaning solution.

[0089] It is understood that the method for collecting concentration parameters is not limited in the control method for water purifiers of the present invention. For example, those skilled in the art can set a concentration detection component in the cleaning circuit to obtain the cleaning agent concentration information of the cleaning liquid, or they can set a sampling pipeline in the cleaning circuit to sample the cleaning liquid in the cleaning circuit and detect it through the detection component, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0090] Preferably, the water purifier of the present invention further includes a pH detection component, which is disposed on the cleaning circuit and used to detect the pH value of the cleaning liquid in the cleaning circuit.

[0091] Since the present invention uses acidic and / or alkaline cleaning agents, it is convenient and quick to use a pH value detection component to detect the concentration of the cleaning agent in the cleaning circuit.

[0092] It should also be noted that the present invention does not limit the specific type of acidic cleaning agent. For example, the acidic cleaning agent can be at least one of malic acid, citric acid, hydrochloric acid, and phosphoric acid. Of course, the acidic cleaning agent can also be other types of acidic solutions, and those skilled in the art can make adjustments according to actual needs.

[0093] Preferably, the acidic cleaning agent is malic acid or citric acid, which not only cleans dirt but also has a good disinfection and antibacterial effect, and can disinfect and inhibit bacteria on the reverse osmosis membrane filter element 10.

[0094] It should be noted that the present invention does not limit the specific type of alkaline cleaning agent. For example, the alkaline cleaning agent can be at least one of dishwashing powder, baking soda, sodium hydroxide, potassium hydroxide, calcium hydroxide, calcium oxide, sodium citrate, tetrasodium ethylenediaminetetraacetate, sodium dodecyl sulfate, sodium disulfite, and sodium bisulfite. Of course, the alkaline cleaning agent can also be other types of alkaline solutions, and those skilled in the art can make adjustments according to actual needs.

[0095] Preferably, in step S224 above, the step of "selectively ending the cleaning mode of the water purifier based on further judgment results" specifically includes:

[0096] S2241: If the judgment result is "yes", then the water purifier will end the cleaning mode;

[0097] S2242: If the judgment result is "No", then the water purifier will not end the cleaning mode.

[0098] With this setting, if the judgment result is "yes," it means that there is sufficient detergent in the cleaning circuit. If the water quality information in the cleaning circuit no longer changes, it means that the problem is not due to insufficient detergent. In other words, it means that the dirt on the reverse osmosis membrane filter element 10 has been completely cleaned and entered the cleaning solution, and the reverse osmosis membrane filter element 10 has been cleaned. In this case, the water purifier should end the cleaning mode in time to avoid prolonged cleaning and affecting the normal use of the water purifier. At the same time, it can also help save energy. If the judgment result is "no," it means that there is insufficient detergent in the cleaning circuit. The lack of change in the water quality information in the cleaning circuit may be due to insufficient detergent, which prevents the dirt on the reverse osmosis membrane filter element 10 from dissolving. In this case, it is still necessary to continue cleaning the reverse osmosis membrane filter element 10, that is, the water purifier should not end the cleaning mode.

[0099] Preferably, if the judgment result is "no", the water purifier adds cleaning agent into the cleaning circuit.

[0100] When it is determined that the cleaning agent in the cleaning circuit is insufficient, the water purifier adds cleaning agent to the cleaning circuit. This increases the concentration of cleaning agent in the cleaning solution and prevents the dirt attached to the reverse osmosis membrane filter element 10 from being unable to be cleaned due to insufficient cleaning agent. Once the cleaning solution has sufficient cleaning agent, it can continue to clean the reverse osmosis membrane filter element 10, thereby improving the cleaning effect of the reverse osmosis membrane filter element 10.

[0101] It is conceivable that any method for adding detergent to the cleaning circuit of a water purifier that can be used by those skilled in the art can be employed. For example, the cleaning component can be configured to have a detergent replenishing component, and the detergent replenishing component can be configured to be electrically connected to the controller. When it is determined that the detergent in the cleaning circuit is insufficient, the controller controls the detergent replenishing component to add an appropriate amount of detergent to the cleaning circuit. Alternatively, when it is determined that the detergent in the cleaning circuit is insufficient, the water purifier issues a detergent shortage warning signal to remind the user to manually add detergent to the cleaning circuit, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0102] Preferably, the cleaning assembly of the present invention further includes a cleaning agent replenishing component (not shown in the figure), which is used to replenish cleaning agent into the cleaning circuit.

[0103] It should be noted that, in practical applications, those skilled in the art can configure the cleaning agent replenishing component to replenish cleaning agent into the cleaning agent storage component, or to replenish cleaning agent into the cleaning pipeline, or to replenish cleaning agent into the circulation pipeline 31, etc. Such adjustments and changes to the specific replenishment method of the cleaning agent replenishing component into the cleaning circuit do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0104] Preferably, the detergent replenishing member is configured to replenish detergent into the detergent storage member 21.

[0105] It should be noted that the present invention does not limit the specific structural form of the cleaning agent replenishing component, as long as it can replenish the cleaning agent storage component 21. For example, the cleaning agent replenishing component can be positioned above the cleaning agent storage component 21, with a valve at the bottom of the component to control its opening and replenish the cleaning agent in the component to the storage component 21. Alternatively, the component can have a housing and a turntable inside the housing, with partitions around the turntable dividing the turntable and housing into multiple independent cavities. Each cavity contains an appropriate amount of cleaning agent, and the bottom of the housing has a cleaning agent outlet. Rotating the turntable allows the cleaning agent in the cavity to enter the storage component 21 through the outlet. Furthermore, the component can be configured in any other possible form. Such adjustments and changes to the specific structural form of the cleaning agent replenishing component do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0106] Specifically, the cleaning agent is an acidic or alkaline cleaning agent, and the concentration parameter includes the pH value;

[0107] The steps for "obtaining the concentration parameters of the cleaning agent within the cleaning loop" specifically include:

[0108] Obtain the current pH value of the cleaning fluid within the cleaning circuit;

[0109] The steps for "determining whether the cleaning agent in the cleaning circuit is sufficient based on the concentration parameters" specifically include:

[0110] Obtain the preset pH value corresponding to the cleaning agent;

[0111] Based on the current pH value and the preset pH value, determine whether there is enough cleaning agent in the cleaning circuit.

[0112] By setting it up this way, the current pH value is obtained and compared with the preset pH value to determine whether there is enough cleaning agent in the cleaning circuit.

[0113] It should be noted that the preset pH value is a value set manually. It can be a preset pH value set when the water purifier leaves the factory, or it can be obtained by a person skilled in the art before the water purifier leaves the factory by testing different types of cleaning agents to obtain the preset pH value corresponding to different cleaning agents. The user can then input the preset pH value into the controller of the water purifier according to the type of cleaning agent and the instruction manual.

[0114] It should also be noted that the determination of whether the cleaning agent in the cleaning circuit is sufficient is not limited to the current pH value and the preset pH value. For example, a preset pH range compatible with the cleaning agent can be obtained, and the determination of whether the cleaning agent in the cleaning circuit is sufficient can be based on the current pH value and the preset pH value range, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention. Of course, it is preferable to determine whether the cleaning agent in the cleaning circuit is sufficient based on the current pH value and the preset pH value.

[0115] It should be noted that, in practical applications, those skilled in the art can directly compare the current pH value with the preset pH value, and determine whether the cleaning agent in the cleaning circuit is sufficient based on the comparison result. Alternatively, they can first calculate the difference between the current pH value and the preset pH value, and then compare the difference with the preset value, and determine whether the cleaning agent in the cleaning circuit is sufficient based on the comparison result. Or, they can first calculate the ratio between the current pH value and the preset pH value, and then compare the ratio with the preset value, and determine whether the cleaning agent in the cleaning circuit is sufficient based on the comparison result, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention, and should all be included within the protection scope of the present invention.

[0116] Preferably, the difference between the current pH value and the preset pH value is first calculated, and then the difference is compared with the first preset value A1 or the second preset value A2 to determine whether the cleaning agent in the cleaning circuit of the water purifier is sufficient. This method can avoid misjudgment caused by errors in pH detection of the cleaning solution, thereby making the user experience better.

[0117] The following describes specific embodiments of the control method of the present invention in detail, using the following two scenarios as examples.

[0118] Scenario 1:

[0119] Specifically, the cleaning agent is an acidic cleaning agent, the current pH value is recorded as PH1, and the preset pH value is recorded as PHA;

[0120] The steps for "determining whether there is sufficient cleaning agent in the cleaning circuit based on the current pH value" specifically include:

[0121] Calculate the first difference Δ1 = PH1 - PHA;

[0122] Compare the first difference △1 with the first preset value A1;

[0123] Based on the comparison results, determine whether there is sufficient cleaning agent in the cleaning circuit;

[0124] Where A1≥0.

[0125] Preferably, the step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the comparison results" specifically includes:

[0126] If △1>A1, then the cleaning agent in the cleaning circuit is insufficient;

[0127] If △1≤A1, then there is sufficient cleaning agent in the cleaning circuit;

[0128] With this setting, if △1 > A1, it means that the current pH value is too high, and the concentration of acidic detergent in the cleaning solution is low. It is determined that the detergent in the cleaning circuit is insufficient and needs to be added to the cleaning circuit. If △1 ≤ A1, it means that the current pH value in the cleaning circuit is still relatively low, and the concentration of detergent in the cleaning circuit is within the normal range, that is, the detergent in the cleaning circuit is sufficient.

[0129] Scenario 2:

[0130] The cleaning agent is alkaline. The current pH value is recorded as pH2, and the preset pH value is recorded as pHb.

[0131] The steps for "determining whether there is sufficient cleaning agent in the cleaning circuit based on the current pH value" specifically include:

[0132] Calculate the second difference Δ2 = PH2 - PHb;

[0133] Compare the second difference △2 with the second preset value A2;

[0134] Based on the comparison results, determine whether there is sufficient cleaning agent in the cleaning circuit;

[0135] Where A2≤0.

[0136] Preferably, the step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the comparison results" specifically includes:

[0137] If △2>A2, then there is sufficient cleaning agent in the cleaning circuit;

[0138] If △2≤A2, then the cleaning agent in the cleaning circuit is insufficient.

[0139] With this setting, if △2>A2, it means that the current pH value of the cleaning solution in the cleaning circuit is still relatively high, and the concentration of alkaline detergent in the cleaning solution is high. It is determined that the detergent in the cleaning circuit is sufficient and there is no need to add detergent to the cleaning circuit. If △2≤A2, it means that the current pH value of the cleaning solution in the cleaning circuit is low, that is, the concentration of alkaline detergent in the cleaning solution is low. In other words, the detergent in the cleaning circuit is insufficient and needs to be added to the cleaning circuit.

[0140] It should be noted that after the water purifier ends the cleaning mode, the cleaning liquid in the cleaning circuit is discharged from the wastewater pipe 71, and the inlet valve 62 is opened to allow the water in the main inlet pipe 50 to enter the reverse osmosis membrane filter element 10, thereby rinsing the reverse osmosis membrane filter element 10 and washing away the residual cleaning agent inside the reverse osmosis membrane filter element 10.

[0141] Preferably, after the water purifier ends the cleaning mode, water in the main inlet 50 flows into the reverse osmosis membrane filter element 10 to rinse the reverse osmosis membrane filter element 10. The rinsing water flows out through the wastewater pipe 71. After starting the rinsing, the control method of the present invention further includes the following steps:

[0142] Obtain the wastewater quality from wastewater pipe 71;

[0143] Obtain the water quality within 50 meters of the main water intake channel;

[0144] Depending on the wastewater and influent water quality, the flushing of the reverse osmosis membrane filter element 10 may be selectively stopped.

[0145] With this setup, when the wastewater quality differs significantly from the influent quality, it indicates that there is still residual detergent in the reverse osmosis membrane filter element 10, meaning that further rinsing of the reverse osmosis membrane filter element 10 is still necessary. When the wastewater quality is similar to the influent quality, it indicates that there is no residual detergent in the reverse osmosis membrane filter element 10, and further rinsing of the reverse osmosis membrane filter element 10 is unnecessary. Timely cessation of rinsing of the reverse osmosis membrane filter element 10 can save water resources and avoid affecting normal user operation due to excessive rinsing time.

[0146] It should be noted that the wastewater quality and influent water quality can be set to pH value, and correspondingly, pH value detection sensors can be installed on the wastewater pipe 71 and the main influent line 50, respectively. Alternatively, the wastewater quality and influent water quality can be set to TDS value, and correspondingly, TDS sensors can be installed on the wastewater pipe 71 and the main influent line 50, etc. Such adjustments and changes to the specific settings of wastewater quality and influent water quality do not deviate from the principles and scope of the present invention, and should all be included within the protection scope of the present invention.

[0147] For example, such as Figure 3 and Figure 4 As shown, the wastewater quality is the TDS value of the wastewater in the wastewater pipe 71, denoted as TDS1, and a wastewater detection component 82 is installed on the wastewater pipe 71; the influent quality is the TDS value of the influent in the main influent line 50, denoted as TDS2, and an influent detection component 83 is installed on the main influent line 50.

[0148] Preferably, the step of "selectively stopping the rinsing of the reverse osmosis membrane filter element 10 according to the wastewater quality and the influent quality" specifically includes:

[0149] Calculate the third difference △3 = TDS1 - TDS2;

[0150] Compare the third difference △3 with the third preset value A3;

[0151] Based on the comparison results, the flushing of the reverse osmosis membrane filter element 10 was selectively stopped.

[0152] Preferably, the step of "selectively stopping the rinsing of the reverse osmosis membrane filter element 10 based on the comparison results" specifically includes:

[0153] If Δ3 ≥ A3, then the rinsing of the reverse osmosis membrane filter element 10 will not be stopped;

[0154] If Δ3 < A3, then stop flushing the reverse osmosis membrane filter element 10.

[0155] Preferably, after the cleaning mode ends, the control method of the present invention further includes:

[0156] Connect the pure water end of the reverse osmosis membrane filter element 10 to the main inlet water line 50 or the wastewater pipe 71.

[0157] With this setup, after cleaning the reverse osmosis membrane filter element 10, a small amount of cleaning agent will seep into the pure water end of the reverse osmosis membrane filter element 10. By connecting the pure water end of the reverse osmosis membrane filter element 10 to the main inlet water line 50 or the wastewater pipe 71, the water from the pure water end of the reverse osmosis membrane filter element 10 can flow back to the main inlet water line 50, or the water from the pure water end of the reverse osmosis membrane filter element 10 can flow into the wastewater pipe 71. This will help to remove the small amount of cleaning agent remaining in the reverse osmosis membrane filter element 10, thus helping to achieve zero addition and zero chemical pollution.

[0158] Preferably, after connecting the pure water end of the reverse osmosis membrane filter element 10 to the main inlet water line 50, the control method of the present invention further includes the following steps:

[0159] Obtain the pure water quality from the pure water outlet pipe 64;

[0160] Obtain the preset water quality;

[0161] Depending on the pure water quality and the preset water quality, the pure water end of the reverse osmosis membrane filter element 10 is selectively connected to the pure water use component 65.

[0162] With this setting, if the pure water quality differs significantly from the preset water quality, the pure water end of the reverse osmosis membrane filter element 10 will not be connected to the pure water use component 65, which helps to discharge any remaining small amount of cleaning agent inside the reverse osmosis membrane filter element 10. If the pure water quality is close to the preset water quality, the pure water end of the reverse osmosis membrane filter element 10 will be connected to the pure water use component 65 to avoid wasting water.

[0163] It should be noted that a pure water detection component 81 can be installed on the pure water outlet pipe 64, and the pure water quality can be obtained based on the detection value of the pure water detection component 81. Alternatively, the pure water quality can be obtained by collecting water from the pure water outlet pipe 64 and performing testing. Such adjustments and changes to the specific method of obtaining the pure water quality in the pure water outlet pipe 64 do not deviate from the principles and scope of the present invention, and should all be included within the protection scope of the present invention.

[0164] Preferably, such as Figure 3 and Figure 4 As shown, a pure water detection component 81 is provided on the pure water outlet pipe 64. The pure water detection component 81 is used to detect the pure water quality in the pure water outlet pipe 64.

[0165] It should be noted that the pure water quality can be TDS value, or it can be pH value, etc. Such adjustments and changes to the specific settings of pure water quality do not deviate from the principles and scope of this invention and should be included within the protection scope of this invention.

[0166] On the other hand, such as Figure 3and Figure 4 As shown, the present invention provides a water purifier, which includes a controller configured to perform the above-described control method for the water purifier.

[0167] Preferably, the water quality detection component 40 is communicatively connected to the controller to provide feedback on water quality information in the cleaning loop of the water purifier.

[0168] Preferably, the pH value detection component is communicatively connected to the controller to provide feedback on the pH value in the cleaning circuit, and to determine whether the cleaning agent in the cleaning circuit is sufficient based on the pH value in the cleaning circuit.

[0169] Preferably, the circulation pump 32 is connected to the controller. The controller determines whether the cleaning mode needs to be stopped based on the water quality information and pH value. When the water quality information in the cleaning circuit no longer changes and there is sufficient cleaning agent in the cleaning circuit, the controller turns off the circulation pump 32 and ends the cleaning mode.

[0170] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A control method for a water purifier, characterized by, The water purifier includes a reverse osmosis membrane filter, a cleaning component, and a circulation pipeline. The cleaning component has a cleaning agent storage member for storing cleaning agent. The cleaning component can deliver cleaning liquid to the inlet end of the reverse osmosis membrane filter. The first end of the circulation pipeline is connected to the wastewater end of the reverse osmosis membrane filter, and the second end of the circulation pipeline is connected to the cleaning component, so that the cleaning component, the inlet end of the reverse osmosis membrane filter, and the wastewater end of the reverse osmosis membrane filter are sequentially connected to form a cleaning loop. The water purifier has a cleaning mode, and when it is in cleaning mode, the cleaning liquid is allowed to circulate within the cleaning circuit. When the water purifier is in cleaning mode, the control method includes the following steps: Obtain water quality information within the cleaning circuit; Based on the water quality information, the water purifier may be selectively terminated from the cleaning mode.

2. The control method for a water purifier according to claim 1, characterized by, The step of "selectively ending the cleaning mode of the water purifier based on the water quality information" specifically includes: Based on the water quality information, determine whether the water quality in the cleaning circuit changes within a preset time period; Based on the judgment result, the water purifier is selectively terminated from the cleaning mode.

3. The control method for a water purifier according to claim 2, characterized by, The step of "selectively ending the cleaning mode of the water purifier based on the judgment result" specifically includes: If the judgment result is "yes", then the water purifier will not end the cleaning mode; And / or, if the determination result is "no", then the concentration parameter of the cleaning agent in the cleaning circuit is further obtained; Based on the concentration parameter, it is further determined whether the cleaning agent in the cleaning circuit is sufficient; Based on further judgment, the water purifier may be selectively terminated from the cleaning mode.

4. The control method for a water purifier according to claim 3, characterized by, The step of "selectively ending the cleaning mode of the water purifier based on further judgment results" specifically includes: If the judgment result is "yes", then the water purifier will end the cleaning mode; And / or, if the determination result is "no", then the water purifier is not allowed to end the cleaning mode.

5. The control method for a water purifier according to claim 4, characterized by, If the judgment result is "no", the water purifier adds cleaning agent into the cleaning circuit.

6. The control method for a water purifier according to claim 3, wherein The cleaning agent is an acidic or alkaline cleaning agent, and the concentration parameter includes the pH value; The step of "obtaining the concentration parameter of the cleaning agent within the cleaning circuit" specifically includes: Obtain the current pH value of the cleaning fluid within the cleaning circuit; The step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the concentration parameter" specifically includes: Obtain the preset pH value corresponding to the cleaning agent; Based on the current pH value and the preset pH value, determine whether the cleaning agent in the cleaning circuit is sufficient.

7. The control method for a water purifier according to claim 6, characterized by, The cleaning agent is an acidic cleaning agent, the current pH value is denoted as PH1, and the preset pH value is denoted as PHA; The step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the current pH value" specifically includes: Calculate the first difference Δ1 = PH1 - PHA; Compare the first difference △1 with the first preset value A1; Based on the comparison results, determine whether the cleaning agent in the cleaning circuit is sufficient; Where A1≥0; Alternatively, the cleaning agent is an alkaline cleaning agent, the current pH value is denoted as PH2, and the preset pH value is denoted as PHb; The step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the current pH value" specifically includes: Calculate the second difference Δ2 = PH2 - PHb; Compare the second difference △2 with the second preset value A2; Based on the comparison results, determine whether the cleaning agent in the cleaning circuit is sufficient; Where A2≤0.

8. The control method for a water purifier according to claim 7, characterized by, The step of "determining whether the cleaning agent in the cleaning circuit is sufficient based on the comparison results" specifically includes: If △1>A1, then the cleaning agent in the cleaning circuit is insufficient; And / or, if △1≤A1, then the cleaning agent in the cleaning circuit is sufficient; or, If △2>A2, then there is sufficient cleaning agent in the cleaning circuit; And / or, if △2≤A2, then the cleaning agent in the cleaning circuit is insufficient.

9. The control method for a water purifier according to any one of claims 1 to 8, characterized in that, The water quality information includes at least one of turbidity value or TDS value.

10. A water purifier, characterized in that, The water purifier includes a controller configured to perform the control method for the water purifier as described in any one of claims 1 to 9.

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