Control method for water purification equipment and water purification equipment

Abstract

The invention relates to the technical field of water purification, particularly provides a control method for water purification equipment and the water purification equipment, and aims to solve the problem that the cleaning effect is poor due to the fact that the concentration of cleaning liquid cannot be controlled when existing water purification equipment uses a cleaning assembly for cleaning. The water purification equipment comprises the reverse osmosis membrane filter element, the cleaning assembly and the circulating pipe, the cleaning assembly can clean the reverse osmosis membrane filter element, the circulating pipe enables the water purification equipment to form a cleaning loop, and the water purification equipment can drive cleaning liquid to circularly flow in the cleaning loop. The control method comprises the following steps that the current concentration C1 of a cleaning agent in a cleaning loop is obtained; acquiring a preset concentration C0 corresponding to the cleaning agent; and according to the current concentration C1 and the preset concentration C0, selectively adding a cleaning agent into the cleaning loop by the water purification equipment. Whether the cleaning agent in the cleaning loop is sufficient or not can be judged, so that the cleaning effect of the cleaning agent on the reverse osmosis membrane filter element can be ensured, and the use experience of a user is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of water purification, and specifically provides a control method for water purification equipment and water purification equipment. Background Art

[0002] As people's living standards improve, their demand for drinking water is also increasing. Water purification equipment such as water purifiers and integrated water purifiers have gradually become essential drinking water facilities in people's daily lives.

[0003] After a long period of use, the dirt in the water will adhere to the reverse osmosis membrane filter element, affecting the water production rate of the water purification equipment, thereby affecting the service life of the reverse osmosis membrane filter element. After the water purification equipment has been used for a period of time, cleaning the reverse osmosis membrane filter element with a detergent can remove the dirt attached to the surface of the reverse osmosis membrane filter element and extend the service life of the reverse osmosis membrane filter element.

[0004] When using a cleaning component to clean a reverse osmosis membrane filter element, a cleaning liquid is usually transported into the reverse osmosis membrane filter element to soak or flush the reverse osmosis membrane filter element, thereby cleaning the dirt on the reverse osmosis membrane filter element. However, as the cleaning agent reacts with the dirt on the reverse osmosis membrane filter element, the cleaning agent will be consumed to a certain extent, resulting in a decrease in the concentration of the cleaning liquid, which in turn leads to poor cleaning effect, affecting the user experience. Summary of the invention

[0005] The present invention aims to solve the above technical problem at least to a certain extent, that is, to solve at least to a certain extent the problem that the existing water purification equipment has poor cleaning effect due to the inability to control the concentration of the cleaning liquid when cleaning with a cleaning component.

[0006] In a first aspect, the present invention provides a control method for a water purification device, the water purification device comprising a reverse osmosis membrane filter element, a cleaning component and a circulation pipe, the cleaning component having a detergent storage component, the detergent storage component being used to store detergent and being able to convey cleaning liquid to the reverse osmosis membrane filter element so as to clean the reverse osmosis membrane filter element, the first end of the circulation pipe being connected to the wastewater end of the reverse osmosis membrane filter element, the second end of the circulation pipe being connected to the cleaning component, so that the cleaning component, the water inlet end of the reverse osmosis membrane filter element and the wastewater end of the reverse osmosis membrane filter element are sequentially connected to form a cleaning loop, when the water purification device is in a cleaning mode, the water purification device can drive the cleaning liquid to circulate in the cleaning loop, when the water purification device executes the cleaning mode, the control method comprising the following steps: obtaining a current concentration C1 of the detergent in the cleaning loop; obtaining a preset concentration C0; and selectively enabling the water purification device to add detergent to the cleaning loop according to the current concentration C1 and the preset concentration C0.

[0007] In the preferred technical scheme of the control method for the above-mentioned water purification equipment, the step of "selectively allowing the water purification equipment to add detergent into the cleaning circuit according to the current concentration C1 and the preset concentration C0" specifically includes: comparing the current concentration C1 with the preset concentration C0; judging whether the current concentration C1 is greater than the preset concentration C0; and according to the judgment result, selectively allowing the water purification equipment to add detergent into the cleaning circuit.

[0008] In the preferred technical solution of the control method for the water purification equipment mentioned above, the step of "selectively allowing the water purification equipment to add detergent into the cleaning circuit according to the judgment result" specifically includes: if the judgment result is "yes", the water purification equipment is not allowed to add detergent into the cleaning circuit.

[0009] In the preferred technical scheme of the control method for the above-mentioned water purification equipment, the step of "selectively allowing the water purification equipment to add detergent into the cleaning circuit according to the judgment result" specifically includes: if the judgment result is "no", obtaining the actual concentration of the detergent in the cleaning circuit in real time; judging whether the concentration of the detergent in the cleaning circuit rises within a preset time according to the actual concentration; and selectively allowing the water purification equipment to add detergent into the cleaning circuit according to the judgment result.

[0010] In the preferred technical solution of the above-mentioned control method for water purification equipment, the step of "selectively allowing the water purification equipment to add detergent into the cleaning circuit according to the judgment result" specifically includes: if the judgment result is "yes", the water purification equipment is not allowed to add detergent into the cleaning circuit; and / or, if the judgment result is "no", the water purification equipment is allowed to add detergent into the cleaning circuit.

[0011] In the preferred technical solution of the control method for the above-mentioned water purification equipment, before allowing the water purification equipment to add detergent into the cleaning circuit, the control method also includes the following steps: determining the amount of the detergent added based on the current concentration C1 and the preset concentration C0; and allowing the water purification equipment to add detergent into the cleaning circuit based on the amount of addition.

[0012] In the preferred technical scheme of the control method for water purification equipment mentioned above, the step of "determining the amount of the detergent to be added based on the current concentration C1 and the preset concentration C0" specifically includes: calculating the first difference △1=C0-C1; comparing the first difference △1 with the first preset value A1 and the second preset value A2 respectively; determining the amount of the detergent to be added based on the comparison result; wherein, 0<A1<A2.

[0013] In the preferred technical scheme of the control method for water purification equipment mentioned above, the step of "determining the amount of the detergent added according to the comparison result" specifically includes: if △≤A1, the amount of the detergent added is m1; if A1<△<A2, the amount of the detergent added is m2; if △≥A2, the amount of the detergent added is m3; wherein, m1<m2<m3.

[0014] In the preferred technical solution of the control method for water purification equipment mentioned above, the water purification equipment also includes a circulation pump, which is arranged on the cleaning circuit and is used to drive the cleaning liquid to circulate in the cleaning circuit. After starting the circulation pump, the control method of the present invention also includes the following steps: obtaining the turbidity value in the cleaning circuit; judging whether the turbidity value changes within a set time; and selectively shutting down the circulation pump based on the judgment result.

[0015] In a second aspect, the present invention further provides a water purification device, comprising a controller, wherein the controller is configured to be able to execute any one of the control methods introduced above.

[0016] When the above-mentioned preferred technical solution is adopted, it is possible to judge whether the cleaning agent in the cleaning circuit is sufficient based on the current preset concentration C1 and the preset concentration C0 of the cleaning liquid in the cleaning circuit, so as to judge whether it is necessary to add cleaning agent to the cleaning circuit so as to maintain the cleaning liquid in the cleaning circuit within an appropriate range, thereby ensuring the cleaning effect of the cleaning liquid on the reverse osmosis membrane filter element and improving the user experience.

[0017] Furthermore, when the current concentration C1 is lower than the preset concentration C0, it may be caused by insufficient detergent or by undissolved detergent. By acquiring the actual concentration of the detergent in the cleaning circuit in real time and judging whether the concentration of the detergent in the cleaning circuit has increased within the preset time based on the actual concentration, it can be determined whether there is still undissolved detergent, thereby avoiding the problem of detergent waste caused by adding detergent to the cleaning circuit when there is still undissolved detergent.

[0018] Furthermore, by calculating the difference between the current concentration C1 and the preset concentration C0 to determine the amount of detergent added, the amount of detergent added to the cleaning circuit can be more accurately controlled, thereby more accurately making the cleaning concentration in the cleaning circuit within an optimal range, further improving the user experience.

[0019] Furthermore, by judging whether the turbidity value in the cleaning circuit changes within the set time, it is possible to judge whether the dirt on the reverse osmosis membrane filter element continues to enter the cleaning liquid in the cleaning circuit, and then it is possible to judge whether the reverse osmosis membrane filter element has been cleaned, so as to timely judge whether to shut down the circulation pump. On the one hand, it can avoid the circulation pump running for too short a time, resulting in the inability to thoroughly clean the dirt on the reverse osmosis membrane filter element. On the other hand, it can also avoid the circulation pump running for too long a time, resulting in energy waste, further improving the user experience.

[0020] Furthermore, by first filtering the cleaning liquid in the cleaning circuit and then detecting the turbidity value of the filtered cleaning liquid, it is possible to avoid the dirt in the cleaning circuit affecting the detection accuracy of the turbidity value, thereby being able to more accurately determine whether the reverse osmosis membrane filter element has been cleaned, further improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings, in which:

[0022] Figure 1 It is a structural schematic diagram of a first embodiment of a water purification device of the present invention;

[0023] Figure 2 It is a structural schematic diagram of a second embodiment of the water purification device of the present invention;

[0024] Figure 3 It is a structural schematic diagram of Embodiment 3 of the water purification device of the present invention;

[0025] Figure 4 is a schematic structural diagram of a fourth embodiment of a water purification device of the present invention;

[0026] Figure 5 is a schematic structural diagram of a fifth embodiment of a water purification device of the present invention;

[0027] Figure 6 is a schematic structural diagram of a sixth embodiment of a water purification device of the present invention;

[0028] Figure 7 is a schematic structural diagram of a detergent storage component in one embodiment of the present invention;

[0029] Figure 8 is a schematic structural diagram of a detergent storage component according to another embodiment of the present invention;

[0030] Fig. 9 is a schematic structural diagram of a detergent storage component according to another embodiment of the present invention;

[0031] Fig.10 is a flow chart of a control method for a water purification device of the present invention;

[0032] Fig.11 It is a flow chart of an embodiment of a control method for a water purification device according to the present invention.

[0033] List of reference numerals:

[0034] 1. Main water inlet; 11. Water inlet valve; 12. Booster pump; 13. Second water quality detection component; 2. Reverse osmosis membrane filter element; 21. Wastewater outlet pipe; 211. Wastewater valve; 212. First water quality detection component; 22. Drain pipe; 221. Drain valve; 23. Backflow pipe; 231. Backflow valve; 301. Cleaning inlet; 302. Cleaning outlet; 31. Cleaning pipeline; 311. First cleaning pipe; 312. Second cleaning pipe; 32. Cleaning valve; 321. First cleaning valve; 322. Second cleaning valve; 33. Cleaning agent storage component; 3301. Storage box; 3302. Receptacle; 3303 , liquid inlet; 3304, liquid outlet; 3305, liquid inlet pipe; 3306, liquid outlet pipe; 3307, filter screen; 3308, drain valve; 331, first detergent storage component; 332, second detergent storage component; 34, one-way valve; 341, first one-way valve; 342, second one-way valve; 343, third one-way valve; 35, manifold; 36, diverter; 361, control valve; 4, pre-filter unit; 5, pure water outlet pipe; 51, pure water use component; 52, third water quality detection component; 61, circulation pipe; 62, circulation pump; 63, concentration detection component; 7, reversing valve. DETAILED DESCRIPTION

[0035] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0036] It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0037] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0038] like Figures 1 to 6 As shown, the water purification device of the present invention includes a reverse osmosis membrane filter element 2, a cleaning component and a circulation pipe 61, the cleaning component has a detergent storage component 33, the detergent storage component 33 is used to store detergent and can transport cleaning liquid to the reverse osmosis membrane filter element 2, so as to clean the reverse osmosis membrane filter element 2, the first end of the circulation pipe 61 is connected to the wastewater end of the reverse osmosis membrane filter element 2, and the second end of the circulation pipe 61 is connected to the cleaning component, so that the cleaning component, the water inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are connected in sequence to form a cleaning loop, and when the water purification device is in cleaning mode, the water purification device can drive the cleaning liquid to circulate in the cleaning loop.

[0039] like Fig.10 As shown, when the water purification device executes the cleaning mode, the control method of the present invention includes the following steps:

[0040] S1: Get the current concentration C1 of the cleaning agent in the cleaning circuit;

[0041] S2: Obtaining a preset concentration C0 corresponding to the cleaning agent;

[0042] S3: According to the current concentration C1 and the preset concentration C0, the water purification device selectively adds detergent into the cleaning circuit.

[0043] Through such a setting, it is possible to judge whether the cleaning agent in the cleaning circuit is sufficient based on the current preset concentration C1 and the preset concentration C0 of the cleaning liquid in the cleaning circuit, and thus it is possible to judge whether it is necessary to add cleaning agent to the cleaning circuit so as to maintain the cleaning liquid in the cleaning circuit within an appropriate range, thereby ensuring the cleaning effect of the cleaning liquid on the reverse osmosis membrane filter element and improving the user experience.

[0044] It should be noted that, in actual applications, the present invention does not impose any limitation on the specific method for obtaining the current concentration C1 of the cleaning fluid in the cleaning circuit. For example, a concentration detection component may be provided on the cleaning circuit, and the current concentration C1 may be obtained based on the detection value of the concentration detection component. Alternatively, a sampling interface may be provided on the cleaning circuit to obtain the current concentration C1 by taking a sample of the cleaning fluid in the cleaning circuit and detecting its concentration, and so on. Such adjustments and changes to the specific method for obtaining the current concentration C1 of the cleaning fluid in the cleaning circuit do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0045] Preferably, the water purification device of the present invention further comprises a concentration detection member 63, which is disposed on the cleaning circuit and is used to detect the current concentration C1 of the cleaning liquid in the cleaning circuit.

[0046] It should be noted that, in actual applications, the present invention does not impose any limitation on the specific location of the concentration detection component 63 in the cleaning circuit. For example, the concentration detection component 63 can be disposed on the circulation pipe 61, or the concentration detection component 63 can be disposed on the main water inlet path 1 between the cleaning component and the reverse osmosis membrane filter element 2, or the concentration detection component can be disposed at any other possible location, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0047] Preferably, if Figures 1 to 6 As shown, the concentration detecting member 63 is provided on the circulation pipe 61 .

[0048] It should be noted that, in actual applications, the present invention does not impose any limitation on the specific driving method for driving the cleaning liquid in the cleaning circuit of the water purification equipment to circulate. For example, a circulation pump 62 can be set on the cleaning circuit to drive the cleaning liquid in the cleaning circuit to circulate by the circulation pump 62, or the cleaning outlet 302 of the cleaning component can be set to be connected to the water inlet end of the reverse osmosis membrane filter element 22 through the main water inlet path 1 of the water purification equipment, and the cleaning liquid in the cleaning circuit can be driven to circulate by the booster pump 12 on the main water inlet path 1, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0049] Preferably, if Figures 1 to 6 As shown, the cleaning component of the present invention has a cleaning outlet 302, and the water purification equipment also includes a water inlet main path 1, a booster pump 12 and a circulation pump 62. The cleaning outlet 302 is connected to the water inlet main path 1, the booster pump 12 is arranged on the water inlet main path 1 and is located at the upstream end of the cleaning outlet 302, and the circulation pump 62 is arranged on the cleaning circuit and is used to drive the liquid in the cleaning circuit to circulate.

[0050] Through such a configuration, compared with the form of driving the circulation of liquid in the cleaning circuit by the booster pump 12, by configuring the circulation pump 62 to drive the circulation of liquid in the cleaning circuit, it is possible to prevent the cleaning liquid from entering the booster pump 12 and damaging the diaphragm of the booster pump 12, thereby avoiding affecting the service life of the booster pump 12. Moreover, since the cost of the circulation pump 62 is much lower than that of the booster pump 12, it is possible to greatly save the cost of the water purification equipment and further enhance the user experience.

[0051] It should be noted that the clean outlet 302 is not limited to being arranged to be connected to the main water inlet 1. For example, the reverse osmosis membrane filter element 2 can also be arranged to have two water inlets, and the clean outlet 302 and the main water inlet 1 are respectively connected to the two water inlets, etc. Such flexible adjustment and change do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention. Of course, preferably, the clean outlet 302 is arranged to be connected to the main water inlet 1.

[0052] It should be noted that, in actual applications, the present invention does not impose any limitation on the specific setting type of the cleaning component. For example, the cleaning component can be set to have only a cleaning outlet 302, that is, a large amount of cleaning liquid is directly stored in the cleaning agent storage component 33. When the reverse osmosis membrane filter element 22 needs to be cleaned, the cleaning agent stored in the cleaning agent storage component 33 flows out from the cleaning outlet 302 and is transported to the reverse osmosis membrane filter element 22. Alternatively, the cleaning component can be set to include a cleaning pipeline 31 and a cleaning agent storage component 33 arranged on the cleaning pipeline 31, and a cleaning inlet 301 and a cleaning outlet 302 are respectively formed at both ends of the cleaning pipeline 31. Water is injected into the cleaning inlet 301 to form cleaning liquid in the cleaning agent storage component 33, and so on. Such adjustments and changes to the specific setting type of the cleaning component do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0053] Preferably, if Figures 1 to 6 As shown, the cleaning component also has a cleaning pipeline 31 and a cleaning inlet 301. The cleaning inlet 301 is connected to the water inlet main path 1 so that water in the water inlet main path 1 enters the detergent storage component 33 to form a cleaning liquid. The cleaning pipeline 31 is used to transport the cleaning liquid to the reverse osmosis membrane filter element 2.

[0054] Through such a configuration, compared with configuring the cleaning component to have only a cleaning outlet 302, configuring the cleaning component to have a cleaning inlet 301 and a cleaning outlet 302 enables the cleaning component to form a cleaning liquid by injecting water into the cleaning inlet 301 during cleaning, thereby avoiding storing a large amount of cleaning liquid in the cleaning agent storage component 33 to cause the volume of the cleaning component to be too large, thereby further improving the user experience.

[0055] It should be noted that, in practical applications, the present application does not impose any restrictions on the specific structural form of the cleaning component, as long as there is a cleaning pipeline 31 and a cleaning agent storage component 33, and both ends of the cleaning pipe form a cleaning inlet 301 and a cleaning outlet 302. For example, the cleaning component can be configured to have only one cleaning agent storage component, or the cleaning component can be configured to have multiple cleaning agent storage components arranged in parallel, etc. Such adjustments and changes to the specific structural form of the cleaning component do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0056] The following two embodiments are described below.

[0057] Embodiment 1:

[0058] like Figure 1 , Figure 3 , Figure 5 and Figure 6 As shown, the cleaning component includes a cleaning pipeline 31 and a cleaning valve 32 and a cleaning agent storage component 33 which are sequentially arranged on the cleaning pipeline 31. The cleaning agent storage component 33 is located at the downstream end of the cleaning valve 32 and is used to store acidic cleaning agents or alkaline cleaning agents. The first end of the circulation pipe 61 is connected to the wastewater end of the reverse osmosis membrane filter element 2, and the second end of the circulation pipe 61 is connected to the cleaning pipeline 31.

[0059] When the cleaning component cleans the reverse osmosis membrane filter element 2, the cleaning valve 32 is opened, and the water in the main water inlet 1 enters the detergent storage component 33 through the cleaning inlet 301 and dissolves the detergent stored in the detergent storage component 33 to form a cleaning liquid, which is then discharged through the cleaning outlet 302 and transported to the reverse osmosis membrane filter element 2, and the cleaning liquid is then used to soak the reverse osmosis membrane filter element 2. Thereafter, the cleaning valve 32 is closed, and the circulation pump 62 is started. The cleaning liquid in the reverse osmosis membrane filter element 2 circulates in the cleaning circuit to flush the reverse osmosis membrane filter element 2 multiple times to remove dirt on the reverse osmosis membrane filter element 2.

[0060] It should be noted that, in actual applications, those skilled in the art may store detergents in the detergent storage component 33 according to actual application requirements. For example, acidic detergents may be stored in the detergent storage component 33, or alkaline detergents may be stored in the detergent storage component 33, and so on. Such adjustments and changes to the detergent type in the detergent storage component 33 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0061] Embodiment 2:

[0062] like Figure 2 and Figure 4As shown, the cleaning component includes a manifold 35, at least two cleaning pipelines 31 arranged in parallel, a cleaning valve 32 and a cleaning agent storage component 33 arranged on each cleaning pipeline 31, the first ends of the multiple cleaning pipelines 31 intersect and are connected to the cleaning inlet 301, the second ends of the multiple cleaning pipelines 31 intersect and are connected to the manifold 35, and the end of the manifold 35 forms a cleaning outlet 302, the cleaning agent storage component 33 is located at the downstream end of the cleaning valve 32, and the cleaning agent storage component 33 on each cleaning pipeline 31 is used to store different types of cleaning agents, the first end of the circulation pipe 61 is connected to the wastewater end of the reverse osmosis membrane filter element 2, and the second end of the circulation pipe 61 is connected to the cleaning pipeline 31.

[0063] It should be noted that, in actual applications, the present invention does not impose any limitation on the specific number of cleaning pipelines 31 arranged in parallel. For example, two cleaning pipelines 31 arranged in parallel can be set, and the two cleaning pipelines 31 are respectively provided with cleaning valves 32 and cleaning agent storage components 33, or three cleaning pipelines 31 arranged in parallel can be set, and the three cleaning pipelines 31 are respectively provided with cleaning valves 32 and cleaning agent storage components 33, or a plurality of cleaning pipelines 31 arranged in parallel can be set, and a plurality of cleaning main pipelines are respectively provided with cleaning valves 32 and cleaning agent storage components 33, and so on. Such adjustments and changes to the specific setting number of cleaning pipelines 31 arranged in parallel do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0064] The following description will be made by taking the arrangement of two cleaning pipelines 31 arranged in parallel as an example.

[0065] Specifically, Figure 2 and Figure 4 As shown, the cleaning component includes a manifold 35, a first cleaning pipe 311 and a second cleaning pipe 312 arranged in parallel, the first cleaning pipe 311 is provided with a first cleaning valve 321 and a first cleaning agent storage component 331, the second cleaning pipe 312 is provided with a second cleaning valve 322 and a second cleaning agent storage component 332, the first end of the first cleaning pipe 311 and the first end of the second cleaning pipe 312 intersect and form a cleaning inlet 301, the second end of the first cleaning pipe 311 and the second end of the second cleaning pipe 312 intersect and are connected to the manifold 35, and the end of the manifold 35 forms a cleaning outlet 302, the first cleaning agent storage component 331 is located at the downstream end of the first cleaning valve 321 and is used to store acidic cleaning agents, the second cleaning agent storage component 332 is located at the downstream end of the second cleaning valve 322 and is used to store alkaline cleaning agents, and the circulating pump 62 is arranged on the manifold 35.

[0066] Preferably, if Figure 2 and Figure 4As shown, the cleaning component also includes a diverter pipe 36 and a control valve 361. The first end of the diverter pipe 36 forms a cleaning inlet 301. The first end of the first cleaning pipe 311 and the second end of the second cleaning pipe 312 intersect and are connected to the second end of the diverter pipe 36. The second end of the circulation pipe 61 is connected to the second end of the diverter pipe 36. The control valve 361 is arranged on the diverter pipe 36 and is used to control the on and off of the diverter pipe 36.

[0067] Through such an arrangement, the second end of the circulation pipe 61 can be connected to the upstream ends of the first detergent storage component 331 and the second detergent storage component 332, so that the detergents in the first detergent storage component 331 and the second detergent storage component 332 are completely transported to the reverse osmosis membrane filter element 2, thereby improving the cleaning effect of the reverse osmosis membrane filter element 2. At the same time, the control valve 361 provided on the diverter pipe 36 can also prevent the cleaning liquid in the cleaning circuit from flowing back into the water inlet main path 1 and polluting the water inlet main path 1.

[0068] It should be noted that when cleaning the reverse osmosis membrane filter element 2, the reverse osmosis membrane filter element 2 can be cleaned first with an acidic detergent and then with an alkaline detergent, or the reverse osmosis membrane filter element 2 can be cleaned first with an alkaline detergent and then with an acidic detergent, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included in the protection scope of the present invention.

[0069] The cleaning process of the reverse osmosis membrane filter element 2 is introduced below by taking the example of first using an acidic detergent to clean the reverse osmosis membrane filter element 2 and then using an alkaline detergent to clean the reverse osmosis membrane filter element 2.

[0070] like Figure 2 and Figure 4As shown, the first cleaning valve 321 is opened, and the second cleaning valve 322 remains closed, so that the water in the water inlet main path 1 enters the first cleaning pipe 311, and forms a first cleaning liquid (i.e., an acidic solution) in the first cleaning agent storage component 331, and then is discharged through the cleaning outlet 302 and transported to the reverse osmosis membrane filter element 2. At this time, the first cleaning pipe 311, the water inlet end of the reverse osmosis membrane filter element 2, and the wastewater end of the reverse osmosis membrane filter element 2 are connected in sequence to form a cleaning loop, and the circulation pump 62 is started to circulate the first cleaning liquid in the cleaning loop to soak and circulate the reverse osmosis membrane filter element 2 to remove inorganic dirt on the reverse osmosis membrane filter element 2. After the cleaning is completed, the reverse osmosis membrane The liquid in the filter element 2 is discharged and rinsed, and then the first cleaning valve 321 is closed and the second cleaning valve 322 is opened, so that the water in the main water inlet path 1 enters the second cleaning pipe 312 and forms a second cleaning liquid (i.e., alkaline solution) in the second cleaning agent storage component 332. At this time, the second cleaning pipe 312, the water inlet end of the reverse osmosis membrane filter element 2 and the wastewater end of the reverse osmosis membrane filter element 2 are connected in sequence to form a cleaning circuit, which is then discharged through the cleaning outlet 302 and transported to the reverse osmosis membrane filter element 2. The circulation pump 62 is started to circulate the second cleaning liquid in the cleaning circuit to soak and circulate the reverse osmosis membrane filter element 2 to remove organic dirt on the reverse osmosis membrane filter element 2.

[0071] It should be noted that the present invention does not impose any limitation on the specific type of the acidic detergent. For example, the acidic detergent can be set to at least one of malic acid, citric acid, hydrochloric acid, and phosphoric acid. Of course, the acidic detergent can also be other types of acidic solutions. Those skilled in the art can adjust according to actual needs.

[0072] 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 the reverse osmosis membrane filter element 2.

[0073] It should also be noted that the present invention does not impose any limitation on the specific type of alkaline cleaner. For example, the alkaline cleaner can be set to at least one of dishwashing powder, soda, baking soda, sodium hydroxide, potassium hydroxide, calcium hydroxide, calcium oxide, sodium citrate, tetrasodium ethylenediaminetetraacetic acid, sodium dodecyl sulfate, sodium disulfite, and sodium bisulfite. Of course, the alkaline cleaner can also be other types of alkaline solutions, and those skilled in the art can adjust according to actual needs.

[0074] It should be noted that, in actual applications, those skilled in the art may set a check structure in the detergent storage component 33 to prevent water in the main water inlet path 1 from entering the detergent storage component 33 through the cleaning outlet 302, or, a one-way valve 34 may be set on the cleaning pipeline 31 to prevent water in the main water inlet path 1 from entering the detergent storage component 33 through the cleaning outlet 302, or, a control valve may be set on the cleaning pipeline 31 to prevent water in the main water inlet path 1 from entering the detergent storage component 33 through the cleaning outlet 302, and so on. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0075] Preferably, if Figures 1 to 6 As shown, a one-way valve 34 is provided on the cleaning pipeline 31 , and the one-way valve 34 is located at the downstream end of the detergent storage component 33 and can prevent water in the main water inlet path 1 from entering the detergent storage component 33 through the cleaning outlet 302 .

[0076] By setting a one-way valve 34, when the water purification equipment is in the normal water production mode, it is possible to prevent the water in the main water inlet path 1 from flowing back into the detergent storage component 33, thereby preventing the detergent from dissolving and entering the reverse osmosis membrane filter element 2 in the normal water production mode. At the same time, since the cost of the one-way valve 34 is significantly lower than that of the control valve, compared with the form of setting a control valve on the cleaning pipeline 31, by setting a one-way valve 34 to prevent the water in the main water inlet path 1 from entering the detergent storage component 33 through the cleaning outlet 302, the cost of the water purification equipment can be further saved.

[0077] Specifically, Figure 2 and Figure 4 As shown, a first one-way valve 341 is provided on the first cleaning pipe 311 , and a second one-way valve 342 is provided on the second cleaning pipe 312 .

[0078] It should be noted that it is not limited to setting the first one-way valve 341 on the first cleaning pipe 311 and setting the second one-way valve 342 on the second cleaning pipe 312. For example, a one-way valve can be set only on the first cleaning pipe or the second cleaning pipe, and a one-way valve can be set on the conduit 35 at the same time.

[0079] It should be noted that the present invention does not impose any limitation on the specific location of the circulation pump 62 in the cleaning circuit. For example, the circulation pump 62 can be set on the cleaning pipeline 31 or the manifold 35, or the circulation pump 62 can be set on the circulation pipe 61, or the circulation pump 62 can be set on the main water inlet path 1 between the cleaning component and the reverse osmosis membrane filter element 2, and so on. Such adjustments and changes to the specific location of the circulation pump 62 in the cleaning circuit do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0080] Preferably, if Figure 1 , Figure 3 , Figures 5 and 6 As shown, the circulation pump 62 is arranged on the cleaning line 31 .

[0081] Preferably, if Figure 2 and Figure 4 As shown, the circulation pump 62 is arranged on the manifold 35 .

[0082] Preferably, the water purification device further comprises a third one-way valve 343 , which is disposed between the cleaning outlet 302 and the circulation pump 62 and is capable of resisting the water pressure in the main water inlet path 1 .

[0083] When the water purification device is in normal water production mode, the water pressure in the water inlet main path 1 is relatively high. By setting the third one-way valve 343, the water pressure in the water inlet main path 1 can be resisted to avoid leakage of the circulation pump 62 due to the high water pressure.

[0084] It should be noted that, in actual applications, those skilled in the art do not impose any limitation on the specific location of the clean inlet 301. For example, the clean inlet 301 can be set at any possible location on the main water inlet path 1, as long as the water in the main water inlet path 1 can enter the detergent storage component through the clean inlet 301. Alternatively, a pre-filter unit 4 can be provided, and the clean inlet can be set to be located at the downstream end of the pre-filter unit 4, so that the water filtered by the pre-filter unit 4 enters the detergent storage component 33 through the clean inlet 301. Alternatively, the clean inlet 301 can also be set to be located at the upstream end of the pre-filter unit 4, and so on. Such adjustments and changes to the specific location of the clean inlet 301 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0085] Preferably, if Figures 1 to 6 As shown, the water purification device of the present invention further includes a pre-filter unit 4 , the water outlet of the pre-filter unit 4 is connected to the main water inlet 1 , and the cleaning inlet 301 is located at the downstream end of the pre-filter unit 4 .

[0086] Through such an arrangement, that is, by arranging the cleaning inlet 301 to be located at the downstream end of the pre-filter unit 4, the clean water filtered by the pre-filter unit 4 can enter the cleaning agent storage component 33 through the cleaning inlet 301, and the clean water filtered by the pre-filter unit 4 can be used to dissolve the cleaning agent, thereby improving the solubility of the cleaning agent and the cleanliness of the cleaning liquid, thereby effectively improving the cleaning effect of the reverse osmosis membrane filter element 2.

[0087] It should be noted that, in actual applications, those skilled in the art may configure the pre-filter unit 4 as a pre-filter element, or, may configure the pre-filter unit 4 as a composite filter element including a pre-filter element and a post-filter element, and so on. Such adjustments and changes to the specific type of the pre-filter unit 4 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0088] Preferably, the pre-filter unit 4 is a pre-filter element.

[0089] Preferably, if Figures 1 to 6 As shown, the water purification device also includes a water inlet valve 11 arranged on the water inlet main path 1, the clean inlet 301 is located at the upstream end of the water inlet valve 11, and the clean outlet 302 is located at the downstream end of the water inlet valve 11.

[0090] With such an arrangement, when the reverse osmosis membrane filter element 2 needs to be cleaned, the water in the main water inlet path 1 can be prevented from directly entering the reverse osmosis membrane filter element 2 by controlling the water inlet valve 11, thereby avoiding the cleaning liquid from entering the reverse osmosis membrane filter element 2.

[0091] It should be noted that, in actual applications, it is not limited to setting the cleaning inlet 301 to be located at the upstream end of the water inlet valve 11 and setting the cleaning outlet 302 to be located at the downstream end of the water inlet valve 11. For example, the cleaning inlet 301 and the cleaning outlet 302 can also be set to be located at the upstream end of the water inlet valve 11, or, the cleaning inlet 301 and the cleaning outlet 302 can also be set to be located at the downstream end of the water inlet valve 11, and so on. Such adjustment and change of the relative position of the cleaning component and the water inlet valve 11 does not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0092] It should also be noted that, in actual applications, those skilled in the art may set the boost pump 12 at the upstream end of the water inlet valve 11, or, may set the boost pump 12 at the downstream end of the water inlet valve 11, and so on. Such adjustments and changes to the specific setting positions of the boost pump 12 and the water inlet valve 11 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0093] Preferably, if Figures 1 to 6 As shown, the booster pump 12 is located at the upstream end of the water inlet valve 11 , and the clean inlet 301 is located between the booster pump 12 and the water inlet valve 11 .

[0094] By setting the boost pump 12 at the upstream end of the water inlet valve 11 and setting the cleaning inlet 301 between the boost pump 12 and the water inlet valve 11, the cleaning inlet 301 can be located at the downstream end of the boost pump 12, so that the water in the main water inlet path 1 can be pumped into the cleaning component through the boost pump 12 and transported to the reverse osmosis membrane filter element 2, thereby improving the cleaning efficiency and cleaning effect.

[0095] It should be noted that, in actual applications, the preset concentration C0 corresponding to the cleaning liquid can be obtained through the information input by the user on the control panel of the water purification device, or the preset concentration C0 can be pre-implanted into the controller of the water purification device, and the preset concentration C0 corresponding to the cleaning liquid can be obtained by obtaining the information implanted in the controller, or the preset concentration C0 corresponding to the cleaning liquid can be obtained by obtaining information on a mobile device (such as a mobile phone, tablet computer) that is connected to the water purification device for communication, and so on. Such adjustments and changes to the specific method of obtaining the preset concentration C0 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0096] Exemplarily, the preset concentration C0 is first implanted into the controller of the water purification device, and the preset concentration C0 corresponding to the cleaning liquid is obtained by acquiring the information implanted in the controller.

[0097] Preferably, if Fig.11 As shown, the step of "selectively causing the water purification device to add detergent into the cleaning circuit according to the current concentration C1 and the preset concentration C0" specifically includes:

[0098] S31: Compare the current concentration C1 with the preset concentration C0;

[0099] S32: Determine whether the current concentration C1 is greater than the preset concentration C0;

[0100] S33: Based on the judgment result, selectively enable the water purification device to add detergent into the cleaning circuit.

[0101] Through such a setting, that is, by judging whether the concentration of the cleaning agent in the cleaning circuit is greater than the preset concentration, it is possible to accurately judge whether the cleaning agent in the cleaning circuit is sufficient, thereby ensuring that the cleaning liquid is always kept within a more suitable concentration range during the cleaning of the reverse osmosis membrane filter element 2, thereby avoiding affecting the cleaning effect.

[0102] It should be noted that in practical applications, it is not limited to directly comparing the current concentration C1 with the preset concentration C0, and judging whether the current concentration C1 is greater than the preset concentration C0, and selectively allowing the water purification device to add detergent to the cleaning circuit according to the judgment result, or, it is also possible to first calculate the difference between the current concentration C1 and the preset concentration C0, and then compare the difference with the preset value, and selectively allow the water purification device to add detergent to the cleaning circuit according to the comparison result, or, it is also possible to first calculate the ratio between the current concentration C1 and the preset concentration C0, and then compare the ratio with the preset value, and selectively allow the water purification device to add detergent to the cleaning circuit according to the comparison result, etc. Such flexible adjustment and change do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention. Of course, preferably, the current concentration C1 is directly compared with the preset concentration C0, and it is judged whether the current concentration C1 is greater than the preset concentration C0, and according to the judgment result, the water purification device selectively adds detergent to the cleaning circuit.

[0103] Preferably, if Fig.11 As shown, the step of "selectively causing the water purification device to add a cleaning agent into the cleaning circuit according to the judgment result" specifically includes:

[0104] S331: If the judgment result is "yes", the water purification device is not allowed to add detergent into the cleaning circuit.

[0105] Through such a setting, when the judgment result is "yes", it means that the current concentration of the detergent in the cleaning circuit meets the cleaning requirements. At this time, the cleaning liquid in the cleaning circuit can effectively clean the reverse osmosis membrane filter element 2 without adding detergent to the cleaning circuit.

[0106] Preferably, if Fig.11 As shown, the step of "selectively causing the water purification device to add a cleaning agent into the cleaning circuit according to the judgment result" specifically includes:

[0107] S332: If the judgment result is "no", the actual concentration of the cleaning agent in the cleaning circuit is obtained in real time;

[0108] S333: judging whether the concentration of the cleaning agent in the cleaning circuit increases within a preset time according to the actual concentration;

[0109] S334: Based on the judgment result, selectively enable the water purification device to add detergent into the cleaning circuit.

[0110] With such a setting, when the judgment result is "no", it means that the current concentration C1 of the cleaning liquid in the cleaning circuit is lower than the preset concentration C0. At this time, it may be caused by insufficient detergent or undissolved detergent. By obtaining the actual concentration of the detergent in the cleaning circuit in real time and judging whether the concentration of the detergent in the cleaning circuit has increased within the preset time based on the actual concentration, it can be determined whether there is still undissolved detergent, thereby avoiding the problem of detergent waste caused by adding detergent to the cleaning circuit when there is still undissolved detergent.

[0111] Preferably, if Fig.11 As shown, the step of "selectively causing the water purification device to add a cleaning agent into the cleaning circuit according to the judgment result" specifically includes:

[0112] S3341: If the judgment result is "yes", the water purification device will not add detergent into the cleaning circuit.

[0113] Through such a setting, when the judgment result is "yes", it means that the concentration of the detergent in the cleaning circuit is still rising within the preset range, which means that there will still be a continuous flow of detergent into the cleaning liquid in the cleaning circuit. At this time, no detergent is added to the cleaning circuit, which can avoid the problem of excessive addition of detergent and resulting in waste of detergent, thereby further improving the user experience.

[0114] Preferably, if Figure 8 As shown, the step of "selectively causing the water purification device to add a cleaning agent into the cleaning circuit according to the judgment result" specifically includes:

[0115] S3342: If the judgment result is "No", the water purification equipment adds detergent into the cleaning circuit.

[0116] Through such a setting, when the judgment result is "no", it means that the concentration of the detergent in the cleaning circuit has not increased within the preset time, that is, the current concentration in the cleaning circuit is not greater than the preset concentration, and the detergent concentration in the cleaning circuit has not increased. At this time, timely adding detergent to the cleaning circuit can avoid affecting the cleaning of the reverse osmosis membrane filter element 2 due to the low concentration of the detergent, thereby improving the cleaning effect and cleaning efficiency.

[0117] It should be noted that, in actual applications, technicians in this field can add a set amount of detergent to the cleaning circuit based on experience, or they can determine the amount of detergent added based on the current concentration C1 and the preset concentration C0, and so on. Such adjustments and changes to the specific amount of detergent added to the cleaning circuit do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0118] Preferably, before the water purification device adds detergent into the cleaning circuit, the control method of the present invention comprises the following steps:

[0119] Determine the amount of detergent to be added according to the current concentration C1 and the preset concentration C0;

[0120] The water purification device adds detergent to the cleaning circuit according to the added amount.

[0121] Through such a setting, the amount of detergent to be added to the cleaning circuit can be determined more accurately based on the current concentration C1 and the preset concentration C0 in the cleaning circuit. On the one hand, it can avoid the problem of excessive addition resulting in excessive concentration of detergent in the cleaning circuit and resulting in waste of detergent. On the other hand, it can also avoid the problem of too little addition resulting in too low concentration of detergent in the cleaning circuit and affecting the cleaning effect, thereby further improving the user experience.

[0122] It should be noted that, in actual applications, those skilled in the art may first calculate the difference between the current concentration C1 and the preset concentration C0, and then compare the difference with the preset value, and determine the amount of detergent to be added based on the comparison result. Alternatively, they may first calculate the ratio between the current concentration C1 and the preset concentration C0, and then compare the ratio with the preset value, and determine the amount of detergent to be added based on the comparison result. Alternatively, they may determine the amount of detergent to be added based on the current concentration C1 and the preset concentration C0 by any other possible means, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0123] Preferably, the step of "determining the amount of detergent to be added based on the current concentration C1 and the preset concentration C0" specifically includes:

[0124] Calculate the first difference △1=C0-C1;

[0125] Compare the first difference △1 with the first preset value A1 and the second preset value A2 respectively;

[0126] According to the comparison results, the amount of cleaning agent to be added is determined;

[0127] Among them, 0<A1<A2.

[0128] It should be noted that, in practical applications, those skilled in the art may determine specific values ​​of the first preset value A1 and the second preset value A2 based on experience or experiments.

[0129] Preferably, the step of "determining the amount of detergent to be added according to the comparison result" specifically includes:

[0130] If △≤A1, the amount of detergent added is m1;

[0131] If A1<△<A2, the amount of detergent added is m2;

[0132] If △ ≥ A2, the amount of detergent added is m3;

[0133] Among them, m1<m2<m3.

[0134] Through such a setting, when △≤A1, it means that the deviation between the current concentration C1 and the preset concentration C0 is small, and the concentration of the detergent in the cleaning circuit can reach the preset concentration by adding a small amount of detergent. When A1<△<A2, it means that the deviation between the current concentration C1 and the preset concentration C0 is moderate, and the concentration of the detergent in the cleaning circuit can reach the preset concentration by adding an appropriate amount of detergent. When △≥A2, it means that the deviation between the current concentration C1 and the preset concentration C0 is large, and more detergent is required to make the concentration of the detergent in the cleaning circuit reach the preset concentration.

[0135] It should be noted that before the water purification equipment leaves the factory, the specific values ​​of m1, m2 and m3 can be determined in advance through tests.

[0136] It should be noted that, in actual applications, technicians in this field can set the detergent to an acidic detergent, or set the detergent to an alkaline detergent, or set the detergent to any other possible type, etc. Such adjustments and changes to the specific setting type of the detergent do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0137] Preferably, the cleaning agent is an acidic cleaning agent or an alkaline cleaning agent, and accordingly, the concentration detection component is a pH sensor, and the pH sensor is used to detect the pH value of the cleaning liquid in the cleaning circuit.

[0138] Preferably, the step of “obtaining the current concentration C1 of the cleaning agent in the cleaning circuit” specifically includes:

[0139] The current pH value of the cleaning liquid in the cleaning circuit is obtained to obtain the current concentration C1 of the cleaning agent in the cleaning circuit.

[0140] The control method for a water purification device of the present invention is introduced below in combination with the following two situations.

[0141] Scenario 1:

[0142] The cleaning agent is an acidic cleaning agent, and the step of “obtaining the current concentration C1 of the cleaning agent in the cleaning circuit” specifically includes:

[0143] Get the current pH value of the cleaning fluid in the cleaning circuit;

[0144] The steps of “obtaining the preset concentration C0” specifically include:

[0145] Get the preset pH value;

[0146] The step of “determining whether the current concentration C1 is greater than the preset concentration C0” specifically includes:

[0147] Determine whether the current pH value is less than the preset pH value;

[0148] According to the judgment result, the water purification device is selectively made to add cleaning agent into the cleaning circuit.

[0149] Specifically, the step of "selectively causing the water purification device to add a cleaning agent into the cleaning circuit according to the judgment result" specifically includes:

[0150] If the judgment result is "yes", the water purification device is not allowed to add detergent into the cleaning circuit;

[0151] If the judgment result is "no", the actual pH value of the cleaning liquid in the cleaning circuit is obtained in real time to determine whether the pH value of the cleaning liquid in the cleaning circuit decreases within a preset time;

[0152] Based on the judgment result, the water purification device selectively adds cleaning agent into the cleaning circuit.

[0153] Specifically, if the judgment result is "yes", the water purification device is not allowed to add detergent into the cleaning circuit;

[0154] If the judgment result is "No", the water purification device adds detergent into the cleaning circuit.

[0155] Scenario 2:

[0156] The cleaning agent is an alkaline cleaning agent, and the step of “obtaining the current concentration C1 of the cleaning agent in the cleaning circuit” specifically includes:

[0157] Get the current pH value of the cleaning fluid in the cleaning circuit;

[0158] The steps of “obtaining the preset concentration C0” specifically include:

[0159] Get the preset pH value;

[0160] The step of “determining whether the current concentration C1 is greater than the preset concentration C0” specifically includes:

[0161] Determine whether the current pH value is greater than the preset pH value;

[0162] Based on the judgment result, the water purification device selectively adds cleaning agent into the cleaning circuit.

[0163] Specifically, the step of "selectively causing the water purification device to add a cleaning agent into the cleaning circuit according to the judgment result" specifically includes:

[0164] If the judgment result is "yes", the water purification device is not allowed to add detergent into the cleaning circuit;

[0165] If the judgment result is "no", the actual pH value of the cleaning liquid in the cleaning circuit is obtained in real time to determine whether the pH value of the cleaning liquid in the cleaning circuit rises within a preset time;

[0166] Based on the judgment result, the water purification device selectively adds cleaning agent into the cleaning circuit.

[0167] Specifically, if the judgment result is "yes", the water purification device is not allowed to add detergent into the cleaning circuit;

[0168] If the judgment result is "No", the water purification device adds detergent into the cleaning circuit.

[0169] It should be noted that there is no limitation on the specific method of adding detergent into the cleaning circuit by the water purification device. For example, the water purification device can be configured to issue a prompt to remind the user to add detergent into the cleaning circuit, or the water purification device can be configured to automatically add detergent into the cleaning circuit, and so on. Such adjustments and changes to the specific method of adding detergent into the cleaning circuit do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0170] Preferably, the cleaning assembly of the present invention further comprises a detergent replenishing component (not shown in the figures), which is used to replenish detergent into the cleaning circuit.

[0171] It should be noted that, in actual applications, those skilled in the art may configure the detergent replenishing component to be able to replenish detergent into the detergent storage component, or, may configure the detergent replenishing component to be able to replenish detergent into the cleaning pipeline, or, may configure the detergent replenishing component to be able to replenish detergent into the circulation pipeline 31, and so on. Such adjustments and changes to the specific method of replenishing detergent into the cleaning circuit by the detergent replenishing component do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0172] Preferably, a detergent replenishing member is provided to be able to replenish the detergent into the detergent storage member 33 .

[0173] It should be noted that the present invention does not impose any limitation on the specific structural form of the detergent replenishing component, as long as the detergent can be replenished into the detergent storage component 33. For example, the detergent replenishing component can be arranged to be located above the detergent storage component 33, and a valve is arranged at the bottom of the detergent replenishing component. The valve is controlled to open so as to replenish the detergent in the detergent replenishing component into the detergent storage component 33. Alternatively, the detergent replenishing component can be arranged to have a shell and a turntable arranged in the shell, and a partition is arranged circumferentially of the turntable. The partition separates the turntable and the shell into a plurality of independent cavities, each cavity is provided with an appropriate amount of detergent, and a detergent outlet is arranged at the bottom of the shell. By rotating the turntable, the detergent in the cavity enters the detergent storage component 33 through the detergent outlet. Alternatively, the detergent replenishing component can be arranged in any other possible form, and so on. Such adjustments and changes to the specific structural form of the detergent replenishing component do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0174] Preferably, after starting the circulation pump 62, the control method of the present invention further comprises the following steps:

[0175] Obtain turbidity values ​​in the cleaning circuit;

[0176] Determine whether the turbidity value changes within the set time;

[0177] According to the determination result, the circulation pump 62 is selectively turned off.

[0178] By judging whether the turbidity value in the cleaning circuit changes within the set time, it is possible to judge whether the dirt on the reverse osmosis membrane filter element 2 continues to enter the cleaning liquid in the cleaning circuit, and then it is possible to judge whether the reverse osmosis membrane filter element 2 has been cleaned, so as to timely judge whether to shut down the circulation pump 62. On the one hand, it can avoid the circulation pump 62 running too short and resulting in the inability to thoroughly clean the dirt on the reverse osmosis membrane filter element 2. On the other hand, it can also avoid the circulation pump 62 running too long and resulting in energy waste, further improving the user experience.

[0179] It should be noted that, in actual applications, those skilled in the art may set a turbidity detection component such as a turbidity sensor on the cleaning circuit to detect the turbidity value in the cleaning circuit, or may take the cleaning liquid in the cleaning circuit to directly measure the turbidity value of the cleaning liquid, etc. Such adjustments and changes to the specific method of obtaining the turbidity value in the cleaning circuit do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0180] Preferably, a turbidity sensor (not shown in the figure) is provided on the cleaning circuit, and the turbidity sensor is used to detect the turbidity value in the cleaning circuit.

[0181] It should be noted that when the reverse osmosis membrane filter element 2 is seriously polluted, more dirt will enter the reverse osmosis membrane filter element 2, and the dirt will affect the detection accuracy of the turbidity value, thereby causing misjudgment.

[0182] Preferably, the step of “obtaining the turbidity value in the cleaning circuit” specifically includes:

[0183] Filter the cleaning fluid in the cleaning circuit;

[0184] Check the turbidity value of the cleaning solution after filtration.

[0185] Through such a setting, the cleaning liquid in the cleaning circuit is first filtered, and then the turbidity value of the cleaning liquid after filtration is detected, which can prevent the dirt in the cleaning circuit from affecting the detection accuracy of the turbidity value, thereby more accurately judging whether the reverse osmosis membrane filter element 2 has been cleaned, further improving the user experience.

[0186] It should be noted that, in actual applications, those skilled in the art may set a filtering component on the cleaning circuit to filter the cleaning liquid in the cleaning circuit, or, the detergent storage component 33 may be set to have a cavity, and the detergent storage component 33 may be set to store the detergent in the cavity when it is in a first working state, and to collect the dirt in the cleaning circuit in the cavity when it is in a second working state, thereby filtering the cleaning liquid, or, the cleaning liquid in the cleaning circuit may be filtered in any other possible manner, and so on. Such adjustments and changes to the specific filtering method for filtering the cleaning liquid do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0187] Preferably, if Figures 7 to 9 As shown, the detergent storage component 33 of the present invention has a cavity 3302, and the detergent storage component 33 is configured to store detergent in the cavity 3302 when it is in a first working state and to collect impurities in the cleaning circuit into the cavity 3302 when it is in a second working state.

[0188] With such an arrangement, the cleaning liquid in the cleaning circuit can be filtered without the need for an additional filtering component, thereby further saving the cost of the water purification equipment.

[0189] Preferably, if Figures 7 to 9 As shown, the detergent storage component 33 of the present invention includes a storage box 3301 and a filter 3307 . A cavity 3302 is formed in the storage box 3301 . The filter 3307 can allow the cleaning liquid to flow out of the cavity 3302 and prevent impurities from flowing out of the cavity 3302 .

[0190] It should be noted that the filter 3307 can also prevent undissolved or agglomerated detergent from passing through, thereby preventing the blocky detergent from entering the reverse osmosis membrane filter element 2 and puncturing the filter membrane of the reverse osmosis membrane filter element 2, further improving the user experience.

[0191] It should be noted that, in actual applications, the present invention does not impose any limitation on the specific location of the filter 3307, as long as it can allow the cleaning liquid to flow out of the cavity 3302 and prevent impurities from flowing out of the cavity 3302. For example, the filter 3307 can be arranged to divide the cavity 3302 into a first chamber 33021 and a second chamber 33022 distributed in sequence along the direction of water flow.

[0192] Combine the following Figures 7 to 9 The specific setting position of the filter 3307 is introduced in detail.

[0193] Scenario 1:

[0194] like Figure 7 As shown, the storage box 3301 has a liquid inlet 3303 and a liquid outlet 3304, and the filter net 3307 is arranged in the storage box 3301 and divides the cavity 3302 into a first chamber 33021 and a second chamber 33022 distributed in a horizontal direction, wherein the first chamber 33021 is connected to the liquid inlet 3303, and the second chamber 33022 is connected to the liquid outlet 3304.

[0195] When the cleaned dirt enters the first chamber 33021 with the cleaning liquid through the liquid inlet 3303, the cleaning liquid can flow into the second chamber 33022 through the filter 3307 and flow out from the liquid outlet 3304, and the dirt (impurities) are intercepted by the filter 3307 and collected in the first chamber 33021.

[0196] Of course, the filter screen 3307 can also be arranged near the liquid outlet 3304 .

[0197] Scenario 2:

[0198] like Figure 8 As shown, the filter net 3307 is arranged in the storage box 3301 and divides the cavity 3302 into a first chamber 33021 and a second chamber 33022 distributed along the vertical direction. The storage box 3301 also includes a liquid inlet 3303 and a liquid outlet pipe 3306. The liquid inlet 3303 is connected to the first chamber 33021, and the liquid outlet pipe 3306 extends into the second chamber 33022 and is connected to the second chamber 33022.

[0199] When the cleaned dirt enters the first chamber 33021 with the cleaning liquid through the liquid inlet 3303, the cleaning liquid can flow into the second chamber 33022 through the filter 3307 and out through the liquid outlet pipe 3306, and the dirt (impurities) are intercepted by the filter 3307 and collected in the first chamber 33021.

[0200] Scenario 3:

[0201] like Fig. 9 As shown, the filter net 3307 is arranged in the storage box 3301 and divides the cavity 3302 into a first chamber 33021 and a second chamber 33022 which are distributed in sequence along the vertical direction. The storage box 3301 also includes a liquid inlet pipe 3305 and a liquid outlet 3304. The liquid inlet pipe 3305 extends into the second chamber 33022 and is connected to the second chamber 33022. The liquid outlet 3304 is connected to the first chamber 33021.

[0202] When the cleaned dirt enters the second chamber 33022 along with the cleaning liquid through the liquid inlet pipe 3305 , the cleaning liquid can flow into the first chamber 33021 through the filter 3307 and out through the liquid outlet 3304 , and the dirt is intercepted by the filter 3307 and collected in the second chamber 33022 .

[0203] It should be noted that although the present invention introduces the specific structure of the detergent storage component 33 with the above three embodiments, this is not restrictive, and any other forms that can allow the cleaning liquid to flow out of the cavity 3302 and prevent impurities from flowing out of the cavity 3302 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0204] Preferably, a drain outlet is also provided on the storage box, and the detergent storage component 33 further includes a drain valve 3308 provided at the drain outlet so as to open or close the drain outlet.

[0205] By setting the sewage valve 3308, when the reverse osmosis membrane filter element 2 is cleaned, the sewage outlet can be opened conveniently, so that the impurities collected in the cavity can be discharged through the sewage outlet to avoid the breeding of bacteria and further improve the user experience.

[0206] Preferably, the water purification equipment of the present invention also includes a wastewater outlet pipe 21 and a wastewater valve 211 arranged on the wastewater outlet pipe 21. The wastewater outlet pipe 21 is connected to the wastewater end of the reverse osmosis membrane filter element 2. After the reverse osmosis membrane filter element 2 is cleaned, the cleaning liquid flows out from the wastewater outlet pipe 21, and the water in the main water inlet path 1 enters the reverse osmosis membrane filter element 2 to flush the reverse osmosis membrane filter element 2, and the flushing water flows out through the wastewater outlet pipe 21.

[0207] When flushing the reverse osmosis membrane filter element 2, the control method of the present invention further comprises the following steps:

[0208] Obtaining current water quality parameters in the wastewater outlet pipe 21;

[0209] Obtain target water quality parameters;

[0210] According to the current water quality parameters and the target water quality parameters, the water purification equipment is selectively stopped from flushing the reverse osmosis membrane filter element 2 .

[0211] Through such an arrangement, when the reverse osmosis membrane filter element 2 is flushed, the water quality parameters of the flushing water in the wastewater outlet pipe 21 can be detected in real time, so that it is possible to accurately judge whether the residual detergent in the reverse osmosis membrane filter element 2 is flushed clean based on the detected water quality of the flushing water after flushing the reverse osmosis membrane filter element 2. On the one hand, it can avoid the problem of the residual detergent in the reverse osmosis membrane filter element 2 being unable to be completely flushed out due to the flushing time being too short, and it can also avoid the problem of water waste due to the flushing time being too long, which greatly improves the user experience.

[0212] It should be noted that, in actual applications, those skilled in the art may set a water quality detection component on the wastewater outlet pipe 21 to obtain the current water quality parameters in the wastewater outlet pipe 21, or, may obtain the current water quality parameters in the wastewater outlet pipe 21 by collecting water in the wastewater outlet pipe 21 and detecting its water quality parameters, or, may obtain the current water quality parameters in the wastewater outlet pipe 21 by any other possible means, and so on. Such adjustments and changes to the specific method of obtaining the current water quality parameters in the wastewater outlet pipe 21 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0213] Preferably, if Figures 1 to 6 As shown, the water purification device of the present invention further includes a first water quality detection component 212 , which is disposed on the wastewater outlet pipe 21 and is used to detect water quality parameters of flushing water in the wastewater outlet pipe 21 .

[0214] It should be noted that the present invention does not impose any limitation on the specific method for obtaining the target water quality parameters. For example, the user can input the local water quality parameters on the control panel of the water purification equipment to obtain the target water quality parameters, or a water quality detection component can be set on the main water inlet path 1 to detect the water quality parameters in the main water inlet path 1 through the water quality detection component to obtain the target water quality parameters, etc. Such adjustments and changes to the specific method for obtaining the target water quality parameters do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0215] Preferably, if Figures 1 to 6As shown, the water purification device of the present invention also includes a second water quality detection component 13, which is arranged on the main water inlet path 1 and is used to detect water quality parameters in the main water inlet path 1. The second water quality detection component 13 is compatible with the first water quality detection component 212.

[0216] Preferably, the step of "obtaining target water quality parameters" specifically includes:

[0217] The water quality parameters in the main water inlet path 1 are obtained as target water quality parameters.

[0218] By arranging a second water quality detection component 13 on the main water inlet path 1 and matching the second water quality detection component 13 with the first water quality detection component 212, the water quality parameters of the flushing water in the main water inlet path 1 can be detected. When the water quality parameters of the flushing water in the wastewater outlet pipe 21 are close to the water quality parameters in the main water inlet path 1, it means that the residual detergent in the reverse osmosis membrane filter element 2 has been completely washed away. In this way, misjudgment caused by poor inlet water quality can be avoided, so that it can more accurately judge whether the detergent in the reverse osmosis membrane filter element 2 is rinsed clean, further improving the user experience.

[0219] It should be noted that, in actual applications, those skilled in the art may directly compare the current water quality parameters with the target water quality parameters, and selectively stop the water purification equipment from flushing the reverse osmosis membrane filter element 2 based on the comparison results, or they may first calculate the difference between the current water quality parameters and the target water quality parameters, and then compare the difference with the preset value, and selectively stop the water purification equipment from flushing the reverse osmosis membrane filter element 2 based on the comparison results, or they may first calculate the ratio of the current water quality parameters to the target water quality parameters, and then compare the ratio with the preset value, and selectively stop the water purification equipment from flushing the reverse osmosis membrane filter element 2 based on the comparison results, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0220] Preferably, the step of "selectively stopping the water purification device from flushing the reverse osmosis membrane filter element 2 according to the current water quality parameters and the target water quality parameters" specifically includes:

[0221] Calculate the second difference △=|D1-D0|;

[0222] Compare the second difference △ with a third preset value A3;

[0223] According to the comparison result, the water purification equipment is selectively stopped from flushing the reverse osmosis membrane filter element;

[0224] Among them, D1 is the current water quality parameter, D0 is the target water quality parameter, and A3≥0.

[0225] Through such a setting, compared with the method of directly comparing the current water quality parameters with the target water quality parameters, and selectively stopping the water purification equipment from flushing the reverse osmosis membrane filter element 2 according to the comparison result, by first calculating the difference between the current water quality parameters and the target water quality parameters, and then comparing the difference with the first preset value, and selectively stopping the water purification equipment from flushing the reverse osmosis membrane filter element 2 according to the comparison result, on the one hand, it can avoid misjudgment caused by detection errors of water quality detection components; on the other hand, when the current water quality parameters in the wastewater outlet pipe 21 are close to the preset water quality parameters, the water purification equipment can stop flushing the reverse osmosis membrane filter element 2 in time, avoiding the problem of wasting water resources due to continuous flushing when the current water quality parameters are close to the preset water quality parameters.

[0226] Preferably, the step of "selectively stopping the water purification device from flushing the reverse osmosis membrane filter element 2 according to the comparison result" specifically includes:

[0227] If △>A1, the water purification equipment does not stop flushing the reverse osmosis membrane filter element 2;

[0228] If △1≤A1, the water purification equipment stops flushing the reverse osmosis membrane filter element 2.

[0229] Through such a setting, when △1>A1, it means that the current water quality parameters in the wastewater outlet pipe 21 are still quite different from the target water quality parameters in the water inlet main path 1, which means that the flushing water still contains a lot of detergent. At this time, the water purification equipment does not stop flushing the reverse osmosis membrane filter element 2, and the residual detergent in the reverse osmosis membrane filter element 2 can continue to be flushed down to avoid residual detergent in the reverse osmosis membrane filter element 2 and affect the user's drinking water safety. When △1≤A1, it means that the current water quality parameters in the wastewater outlet pipe 21 are relatively close to the target water quality parameters in the water inlet main path 1, which means that the flushing water does not contain detergent or contains only a very small amount of detergent, that is, the residual detergent in the reverse osmosis membrane filter element 2 has been flushed clean. At this time, the water purification equipment stops flushing the reverse osmosis membrane filter element 2 in time, which can avoid the problem of water waste and improve the user's experience.

[0230] It should be noted that those skilled in the art can set the specific value of the first preset value A1 according to actual needs.

[0231] Preferably, the water quality parameter includes at least one of a pH value or a TDS value.

[0232] It should be noted that, in actual applications, the present invention does not impose any limitation on the specific connection method for connecting the first end of the circulation pipe 61 with the wastewater end of the reverse osmosis membrane filter element 2. For example, the first end of the circulation pipe 61 can be arranged to be directly connected to the wastewater outlet pipe 21, or, by setting a reversing valve 7, the wastewater end of the reverse osmosis membrane filter element 2 can be selectively connected to the wastewater outlet pipe 21 or the first end of the circulation pipe 61, and so on. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should be included in the protection scope of the present invention.

[0233] Preferably, if Figure 3 and Figure 4 As shown, the water purification equipment also includes a reversing valve 7, wherein the first interface of the reversing valve 7 is connected to the wastewater end of the reverse osmosis membrane filter element 2, the second interface of the reversing valve 7 is connected to the wastewater outlet pipe 21, and the third interface of the reversing valve 7 is connected to the first end of the circulation pipe 61. The first interface of the reversing valve 7 can be selectively connected to the second interface or the third interface.

[0234] Preferably, if Figures 1 to 6 As shown, the water purification device of the present invention further includes a pure water outlet pipe 5 and a pure water using component 51, and the pure water end of the reverse osmosis membrane filter element 2 is connected to the pure water using component 51 through the pure water outlet pipe 5. After the reverse osmosis membrane filter element 2 is cleaned and the water production mode is restored, the control method of the present invention further includes the following steps:

[0235] Obtaining the pure water quality parameters of the pure water end of the reverse osmosis membrane filter element 2;

[0236] According to the pure water quality parameters, the pure water end of the reverse osmosis membrane filter element 2 is selectively connected to the pure water using member 51.

[0237] With such a setting, after the reverse osmosis membrane filter element is cleaned, a small amount of detergent will penetrate into the pure water end of the reverse osmosis membrane filter element 2. By obtaining the pure water quality parameters of the pure water end of the reverse osmosis membrane filter element 2, it is possible to determine whether the pure water end contains detergent residues. When the pure water end contains detergent residues, the pure water end of the reverse osmosis membrane filter element 2 is not connected to the pure water use component 51. When the pure water end does not contain detergent residues, the pure water end of the reverse osmosis membrane filter element 2 is connected to the pure water use component 51, which can help discharge the water containing detergent residues and further improve the drinking water safety of users.

[0238] It should be noted that, in actual applications, those skilled in the art may set a water quality detection component on the pure water outlet pipe to detect the pure water quality parameters at the pure water end, or, may take pure water from the pure water outlet component and detect the water quality parameters of the pure water, or, may obtain the pure water quality parameters in any other possible form, etc. Such adjustments and changes to the specific method of obtaining the pure water quality parameters do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0239] Preferably, if Figures 1 to 6 As shown, a third water quality detection component 52 is provided on the pure water outlet pipe 5 to detect the pure water quality parameters at the pure water end.

[0240] It should be noted that, in actual applications, technicians in this field do not impose any restrictions on the specific setting type of the pure water use component 51, as long as the water at the pure water end of the reverse osmosis membrane filter element 2 can be output for users to drink. For example, the pure water use component 51 can be set as a pure water tank, and the pure water after being filtered by the reverse osmosis membrane filter element 2 is directly transported to the pure water tank for users to drink. Alternatively, the pure water use component 51 can be set as a post-filter element, and the pure water after being filtered by the reverse osmosis membrane filter element 2 is transported to the post-filter element to improve the taste before being provided to users to drink. Alternatively, the pure water use component 51 can be set as a water outlet component (water outlet or faucet), and the pure water after being filtered by the reverse osmosis membrane filter element 2 directly flows out from the water outlet component (water outlet or faucet), and so on. Such adjustments and changes to the specific setting type of the pure water use component 51 do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0241] Preferably, if Figures 1 to 6 As shown, the pure water use component 51 includes a post-filter element. The pure water after being filtered by the reverse osmosis membrane filter element 2 is transported to the post-filter element to improve the taste before being provided to users for drinking.

[0242] It should be noted that the present invention does not impose any limitation on the specific type of pure water quality parameter. For example, the water quality parameter may be a TDS value, or the water quality parameter may be a pure water pH value.

[0243] The following introduction will be made by taking the pure water TDS value as an example of the pure water quality parameter.

[0244] Preferably, the pure water quality parameter is the pure water TDS value.

[0245] The step of “selectively connecting the pure water end of the reverse osmosis membrane filter element 2 with the pure water use component 51 according to the pure water quality parameters” specifically includes:

[0246] Compare the pure water TDS value with the preset TDS value;

[0247] Determine whether the pure water TDS is greater than the preset TDS value;

[0248] Based on the determination result, the pure water end of the reverse osmosis membrane element 2 is selectively connected to the pure water using member 51 .

[0249] It should be noted that the method is not limited to comparing the pure water TDS value with the preset TDS value and selectively connecting the pure water end of the reverse osmosis membrane filter element 2 with the pure water use component 51 based on the judgment result of whether the pure water TDS is greater than the preset TDS value. For example, the difference between the pure water TDS value and the preset TDS value can be calculated first, and then the difference is compared with the preset value. According to the comparison result, the pure water end of the reverse osmosis membrane filter element 2 is selectively connected with the pure water use component 51. Alternatively, the ratio of the pure water TDS value to the preset TDS value can be calculated first, and then the ratio is compared with the preset value. According to the comparison result, the pure water end of the reverse osmosis membrane filter element 2 is selectively connected with the pure water use component 51, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included in the protection scope of the present invention.

[0250] Preferably, the step of "selectively connecting the pure water end of the reverse osmosis membrane filter element 2 with the pure water using component 51 according to the judgment result" specifically includes:

[0251] If the result of the determination is “yes”, the pure water end of the reverse osmosis membrane element 2 is not communicated with the pure water using member 51 .

[0252] Through such an arrangement, when the judgment result is "yes", it means that there is still detergent residue at the pure water end of the reverse osmosis membrane filter element 2. At this time, not connecting the pure water end of the reverse osmosis membrane filter element 2 with the pure water use component 51 can help discharge the water containing detergent residue.

[0253] Preferably, the step of "selectively connecting the pure water end of the reverse osmosis membrane filter element 2 with the pure water using component 51 according to the judgment result" specifically includes:

[0254] If the result of the determination is “No”, the pure water end of the reverse osmosis membrane element 2 is connected to the pure water using member 51 .

[0255] Through such an arrangement, when the judgment result is "no", it means that there is no detergent residue at the pure water end of the reverse osmosis membrane filter element 2. At this time, the pure water end of the reverse osmosis membrane filter element 2 is promptly connected to the pure water use component 51, which can avoid water waste and further extend the service life of the reverse osmosis membrane filter element 2.

[0256] It should be noted that although the present invention is introduced using the pure water TDS value at the pure water end as an example, this is not restrictive, and the scheme of selectively connecting the pure water end of the reverse osmosis membrane filter element 2 with the pure water use component 51 according to the pH value of the pure water end does not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0257] It should be noted that, without connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51, the pure water end of the reverse osmosis membrane filter element 2 can be directly connected to the sewer pipe in the user's use scenario, and the water containing detergent residues can be discharged into the sewer pipe. Alternatively, the pure water end of the reverse osmosis membrane filter element 2 can be arranged to be connected to the wastewater outlet pipe 21, and the water containing detergent residues can be discharged through the wastewater outlet pipe 21. Alternatively, the pure water end of the reverse osmosis membrane filter element 2 can be arranged to be connected to the water inlet end of the reverse osmosis membrane filter element 2, and the water containing detergent residues can be refluxed to the water inlet end of the reverse osmosis membrane filter element 2, and the detergent can be filtered out after multiple cycles, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention, and should be included in the protection scope of the present invention.

[0258] Preferably, when the judgment result is "yes", the control method of the present invention further includes the following steps:

[0259] The pure water end of the reverse osmosis membrane filter element 2 is connected to the wastewater outlet pipe 21 or the water inlet end of the reverse osmosis membrane filter element 2 .

[0260] Specifically, the following Figures 5 and 6 The following two situations are introduced.

[0261] Scenario 1:

[0262] like Figure 5 As shown, the water purification equipment also includes a drain pipe 22 and a drain valve 221. One end of the drain pipe 22 is connected to the pure water outlet pipe 5, and the other end is connected to the waste water outlet pipe 21. The drain valve 221 is arranged on the drain pipe 22 and is used to control the on and off of the drain pipe 22.

[0263] With such an arrangement, after the reverse osmosis membrane filter element 2 is cleaned, the drain valve 221 is first opened to allow the water at the pure water end of the reverse osmosis membrane filter element 2 to flow into the waste water outlet pipe 21 through the drain pipe 22. After the pure water containing the detergent is completely discharged, the drain valve 221 is closed again to allow the water at the pure water end of the reverse osmosis membrane filter element 2 to flow into the pure water use component 51 through the pure water outlet pipe 5, thereby preventing the pure water containing the detergent from entering the pure water use component 51.

[0264] Scenario 2:

[0265] like Figure 6As shown, the water purification equipment also includes a reflux pipe 23 and a reflux valve 231. One end of the reflux pipe 23 is connected to the pure water outlet pipe 5, and the other end of the reflux pipe 23 is connected to the upstream end of the boosting pump 12. The reflux valve 231 is arranged on the reflux pipe 23 and is used to control the on and off of the reflux pipe 23.

[0266] Through such an arrangement, on the one hand, after the reverse osmosis membrane filter element 2 is cleaned, the pure water containing detergent at the pure water end of the reverse osmosis membrane filter element 2 can be discharged to the upstream end of the booster pump 12, and further filtered through the reverse osmosis membrane filter element 2, which helps to discharge the pure water containing detergent. On the other hand, when the water purification equipment is in normal water production mode and does not produce water for a long time, the reverse osmosis membrane filter element 2 will have a "first cup of water TDS value increase" situation, and the "first cup of water" can also flow back to the upstream end of the booster pump 12 through the reflux pipe 23, preventing users from drinking water with a high TDS value.

[0267] In a second aspect, the present invention further provides a water purification device, which includes a controller, and the controller is configured to be able to execute any one of the control methods introduced above.

[0268] It should be noted that, in actual applications, those skilled in the art may configure the water purification equipment as a water purifier, or, may configure the water purification equipment as an all-in-one water purifier, or, may configure the water purification equipment as any other possible type, etc. Such adjustments and changes to the specific setting types of the water purification equipment do not deviate from the principle and scope of the present invention, and should be included in the protection scope of the present invention.

[0269] Exemplarily, the water purification equipment is a water purifier.

[0270] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle 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 these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A control method for a water purification device, characterized in that: The water purification device comprises a reverse osmosis membrane filter element, a cleaning component and a circulation pipe, wherein the cleaning component has a cleaning agent storage component, wherein the cleaning agent storage component is used to store cleaning agent and can convey cleaning liquid to the reverse osmosis membrane filter element so as to clean the reverse osmosis membrane filter element, wherein a first end of the circulation pipe is communicated with a wastewater end of the reverse osmosis membrane filter element, and a second end of the circulation pipe is communicated with the cleaning component, so that the cleaning component, the water inlet end of the reverse osmosis membrane filter element and the wastewater end of the reverse osmosis membrane filter element are sequentially connected to form a cleaning loop, and when the water purification device is in a cleaning mode, the water purification device can drive the cleaning liquid to circulate in the cleaning loop, and when the water purification device executes the cleaning mode, the control method comprises the following steps: Obtaining a current concentration C1 of the cleaning agent in the cleaning circuit; Obtaining a preset concentration C0 corresponding to the cleaning agent; According to the current concentration C1 and the preset concentration C0, the water purification device selectively adds cleaning agent into the cleaning circuit.

2. The control method for water purification equipment according to claim 1, characterized in that: The step of "selectively causing the water purification device to add detergent into the cleaning circuit according to the current concentration C1 and the preset concentration C0" specifically includes: Compare the current concentration C1 with the preset concentration C0; Determine whether the current concentration C1 is greater than the preset concentration C0; According to the judgment result, the water purification device is selectively caused to add cleaning agent into the cleaning circuit.

3. The control method for water purification equipment according to claim 2, characterized in that: The step of "selectively causing the water purification device to add a cleaning agent into the cleaning circuit according to the judgment result" specifically includes: If the judgment result is "yes", the water purification device will not add detergent into the cleaning circuit.

4. The control method for water purification equipment according to claim 3, characterized in that: The step of "selectively causing the water purification device to add a cleaning agent into the cleaning circuit according to the judgment result" specifically includes: If the judgment result is "no", the actual concentration of the cleaning agent in the cleaning circuit is obtained in real time; According to the actual concentration, determining whether the concentration of the cleaning agent in the cleaning circuit increases within a preset time; According to the judgment result, the water purification device is selectively caused to add cleaning agent into the cleaning circuit.

5. The control method for water purification equipment according to claim 4, characterized in that: The step of "selectively causing the water purification device to add a cleaning agent into the cleaning circuit according to the judgment result" specifically includes: If the judgment result is "yes", the water purification device is not allowed to add detergent into the cleaning circuit; And / or, if the judgment result is "no", the water purification device adds detergent into the cleaning circuit.

6. The control method for water purification equipment according to claim 4, characterized in that: Before causing the water purification device to add a cleaning agent into the cleaning circuit, the control method further comprises the following steps: Determining the amount of the cleaning agent to be added according to the current concentration C1 and the preset concentration C0; The water purification device is enabled to add cleaning agent into the cleaning circuit according to the added amount.

7. The control method for water purification equipment according to claim 5, characterized in that: The step of "determining the amount of the detergent to be added according to the current concentration C1 and the preset concentration C0" specifically includes: Calculate the first difference △1=C0-C1; Compare the first difference △1 with the first preset value A1 and the second preset value A2 respectively; According to the comparison result, determining the amount of the cleaning agent to be added; Among them, 0<A1<A2.

8. The control method for water purification equipment according to claim 7, characterized in that: The step of "determining the amount of the cleaning agent to be added according to the comparison result" specifically includes: If △≤A1, the amount of the cleaning agent added is m1; If A1<△<A2, the amount of the cleaning agent added is m2; If △ ≥ A2, the amount of the cleaning agent added is m3; Among them, m1<m2<m3.

9. The control method for a water purification device according to any one of claims 1 to 8, characterized in that: The water purification device further includes a circulation pump, which is arranged on the cleaning circuit and is used to drive the cleaning liquid to circulate in the cleaning circuit. After starting the circulation pump, the control method of the present invention further includes the following steps: Obtaining a turbidity value within the cleaning circuit; Determine whether the turbidity value changes within a set time; According to the judgment result, the circulation pump is selectively turned off.

10. A water purification device, characterized in that: The water purification device includes a controller configured to execute the control method according to any one of claims 1 to 9.

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