Water purification apparatus and control method for water purification apparatus

Abstract

This invention relates to the field of water purification technology, specifically providing a water purification device and a control method for the device. The aim is to solve the problem that existing cleaning components cannot sterilize reverse osmosis membrane filter cartridges, resulting in a poor user experience. The water purification device of this application includes a reverse osmosis membrane filter cartridge and a cleaning component. The cleaning component has a cleaning module and a sterilization module. The cleaning module stores cleaning agent and delivers cleaning solution to the reverse osmosis membrane filter cartridge to remove dirt. The sterilization module stores sterilizing agent and delivers sterilizing solution to the filter cartridge to sterilize it. This invention can clean the reverse osmosis membrane filter cartridge with a cleaning agent, removing dirt and extending its service life. It also sterilizes the filter cartridge with a sterilizing agent, preventing bacterial growth within the filter cartridge and thus protecting the user's drinking water health, thereby improving the user experience.

Description

Technical Field

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

[0002] As people's living standards improve, their demand for drinking water is also increasing. Water purifiers, water purifier-drinking machines, and other water purification equipment are gradually becoming essential drinking water facilities in people's daily lives.

[0003] After prolonged use, dirt and grime can accumulate inside the reverse osmosis membrane filter element, affecting the water production rate and thus the lifespan of the filter element. Cleaning the reverse osmosis membrane filter element with a detergent after a period of use can remove this dirt and extend its lifespan.

[0004] In existing technologies, cleaning the reverse osmosis membrane filter cartridge with a cleaning solution can remove dirt from the surface of the reverse osmosis membrane filter cartridge. However, since the dirt contains a large number of microorganisms, if the reverse osmosis membrane filter cartridge is not sterilized, it will affect the user's drinking water safety. Existing water purification equipment can only clean the dirt off the reverse osmosis membrane filter cartridge, but cannot sterilize the cleaned reverse osmosis membrane filter cartridge, resulting in a poor user experience. Summary of the Invention

[0005] The present invention aims to solve the above-mentioned technical problems to at least a certain extent, that is, to solve the problem that existing cleaning components cannot sterilize reverse osmosis membrane filter elements, resulting in poor user experience.

[0006] In a first aspect, the present invention provides a water purification device, which includes a reverse osmosis membrane filter element and a cleaning component. The cleaning component has a cleaning module and a sterilization module. The cleaning module is used to store cleaning agent and can deliver cleaning liquid to the reverse osmosis membrane filter element to remove dirt from the reverse osmosis membrane filter element. The sterilization module is used to store sterilizing agent and can deliver sterilizing liquid to the reverse osmosis membrane filter element to sterilize the reverse osmosis membrane filter element.

[0007] In the preferred embodiment of the above-mentioned water purification equipment, the main inlet of the water purification equipment is connected to the inlet end of the reverse osmosis membrane filter element. The cleaning component has a cleaning inlet, and the cleaning module and / or the sterilization module can be connected to the cleaning inlet. The cleaning inlet is connected to the main inlet so that water in the main inlet enters the cleaning module and / or the sterilization module, thereby dissolving the cleaning agent and / or the sterilizing agent to form a cleaning solution and / or a sterilizing solution. Alternatively, the cleaning component has a cleaning outlet, which is connected to the main inlet. The cleaning module and / or the sterilization module can be connected to the cleaning outlet, and the cleaning outlet is connected to the main inlet so that the cleaning solution and / or the sterilizing solution in the cleaning module and / or the sterilization module enters the reverse osmosis membrane filter element.

[0008] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes a booster pump installed on the main water inlet, the booster pump being located upstream of the clean outlet; and / or, the water purification equipment further includes a pre-filter unit, the outlet of the pre-filter unit being connected to the main water inlet, and the clean inlet being located downstream of the pre-filter unit.

[0009] In the preferred embodiment of the above-mentioned water purification equipment, the cleaning module includes a cleaning pipeline, a cleaning valve disposed on the cleaning pipeline, and a cleaning agent storage component. The cleaning agent storage component is located downstream of the cleaning valve and is used to store cleaning agent. The sterilization module includes a sterilization pipeline, a sterilization valve disposed on the sterilization pipeline, and a sterilization agent storage component. The sterilization agent storage component is located downstream of the sterilization valve and is used to store sterilization agent. The first end of the cleaning pipeline and the first end of the sterilization pipeline intersect and are connected to the cleaning inlet. The second end of the cleaning pipeline and the second end of the sterilization pipeline intersect and are connected to the cleaning outlet.

[0010] In the preferred embodiment of the above-mentioned water purification equipment, the number of cleaning pipelines is at least two, and multiple cleaning pipelines are arranged in parallel, with the cleaning valve and the cleaning agent storage component corresponding to each cleaning pipeline; and / or, the number of sterilization pipelines is at least two, and multiple sterilization pipelines are arranged in parallel, with the sterilization valve and the sterilization agent storage component corresponding to each sterilization pipeline; and / or, the cleaning component further includes a one-way valve, which is disposed on the cleaning pipeline and / or the sterilization pipeline and located between the cleaning outlet and the cleaning agent storage component and / or the sterilization agent storage component, and the one-way valve is configured to prevent water in the main inlet pipeline from flowing back through the cleaning outlet into the cleaning agent storage component and / or the sterilization agent storage component.

[0011] In the preferred embodiment of the above-mentioned water purification equipment, the water purification equipment further includes a pure water outlet pipe, and the pure water end of the reverse osmosis membrane filter element is connected to the pure water outlet pipe. The water purification equipment also includes a return pipe and a return valve. The first end of the return pipe is connected to the pure water outlet pipe, and the second end of the return pipe is connected to the upstream end of the booster pump of the water purification equipment. The return valve is installed on the return pipe and is used to control the on / off state of the return pipe. Alternatively, the water purification equipment further includes a drain pipe and a drain valve. The first end of the drain pipe is connected to the pure water outlet pipe, and the second end of the drain pipe is connected to the wastewater outlet pipe of the water purification equipment. The drain valve is installed on the drain pipe and is used to control the on / off state of the drain pipe.

[0012] In a second aspect, the present invention also provides a control method for a water purification device, wherein the water purification device is any of the water purification devices described above, and the control method includes the following steps: S1: the cleaning module delivers cleaning liquid to the reverse osmosis membrane filter element; S2: the cleaning liquid soaks the reverse osmosis membrane filter element for a first preset time, and the cleaning liquid is discharged from the reverse osmosis membrane filter element; S3: the sterilization module delivers sterilization liquid to the reverse osmosis membrane filter element; S4: the sterilization liquid soaks the reverse osmosis membrane filter element for a second preset time, and the sterilization liquid is discharged from the reverse osmosis membrane filter element.

[0013] In the preferred embodiment of the control method for the above-mentioned water purification equipment, before immersing the reverse osmosis membrane filter element with the cleaning solution, the control method further includes the following steps: acquiring the operating parameters of the water purification equipment; determining the first preset time based on the operating parameters; wherein the operating parameters include at least one of the following: the influent water quality of the reverse osmosis membrane filter element, the total water production of the reverse osmosis membrane filter element, the cumulative operating time of the water purification equipment, the duration during which the pure water-to-waste ratio of the reverse osmosis membrane filter element is higher than the set pure water-to-waste ratio, the continuous water production duration of the reverse osmosis membrane filter element after the pre-filter element reaches the end of its service life, the pure water flow rate of the reverse osmosis membrane filter element, and the pressure difference between the membrane and the membrane of the reverse osmosis membrane filter element; and / or, during the process of discharging the cleaning solution from the reverse osmosis membrane filter element, the control method further includes the following steps: acquiring the water quality information of the cleaning solution; determining the second preset time based on the water quality information.

[0014] In the preferred embodiment of the control method for the above-mentioned water purification equipment, after the cleaning liquid and / or the bactericidal liquid are discharged from the reverse osmosis membrane filter element, the control method further includes the following steps: supplying water to the reverse osmosis membrane filter element from the water purification equipment to rinse the reverse osmosis membrane filter element; and discharging the rinsing water from the reverse osmosis membrane filter element.

[0015] In the preferred embodiment of the control method for the above-mentioned water purification equipment, the water purification equipment includes a pure water component, and the pure water end of the reverse osmosis membrane filter element can be connected to the pure water component. After the sterilization module finishes sterilizing the reverse osmosis membrane filter element and the reverse osmosis membrane filter element resumes water production mode, the control method further includes the following steps: obtaining the current water quality parameters of the pure water end of the reverse osmosis membrane filter element; and selectively connecting the pure water end of the reverse osmosis membrane filter element to the pure water component based on the current water quality parameters.

[0016] When the above-mentioned preferred technical solution is adopted, by setting the cleaning component to have a cleaning module and a sterilization module, the cleaning agent stored in the cleaning module can clean the reverse osmosis membrane filter element, remove the dirt attached to the reverse osmosis membrane filter element, and help extend the service life of the reverse osmosis membrane filter element. The sterilization agent stored in the sterilization module can sterilize the reverse osmosis membrane filter element, avoid the impact on the user's drinking water health due to the growth of bacteria in the reverse osmosis membrane filter element, and greatly improve the user experience.

[0017] Furthermore, by positioning the booster pump upstream of the cleaning outlet, the cleaning or disinfecting solution can be prevented from flowing through the booster pump, thereby preventing the cleaning or disinfecting solution from corroding the diaphragm inside the booster pump and helping to extend the service life of the booster pump.

[0018] Furthermore, by installing one-way valves on the cleaning and / or sterilization pipelines, when the water purification equipment is in normal water production mode, it can prevent water in the main inlet pipeline from flowing back into the detergent storage component and / or sterilizer storage component, thereby avoiding the detergent and / or sterilizer from dissolving and entering the reverse osmosis membrane filter element under normal water production mode.

[0019] Furthermore, by setting the cleaning inlet downstream of the pre-filter unit, the purified water filtered by the pre-filter unit can enter the detergent storage component (or disinfectant storage component) through the cleaning inlet. The purified water filtered by the pre-filter unit is used to dissolve the detergent (or disinfectant), improving the solubility of the detergent (or disinfectant) and the cleanliness of the cleaning solution (or disinfectant), thereby effectively improving the cleaning effect (or disinfection effect) of the reverse osmosis membrane filter element.

[0020] Furthermore, by incorporating auxiliary cleaning components, the cleaning solution can more effectively interact with the dirt on the reverse osmosis membrane filter element through physical or chemical means, thereby facilitating the removal of dirt from the filter element and further improving the cleaning efficiency and effectiveness of the reverse osmosis membrane filter element, ultimately enhancing the user experience.

[0021] Furthermore, this application enables the cleaning agent storage component to be connected to the inlet end of the reverse osmosis membrane filter element first, thereby allowing the cleaning solution to be delivered into the reverse osmosis membrane filter element to clean it. After cleaning is completed, the disinfectant storage component is then connected to the inlet end of the reverse osmosis membrane filter element, thereby allowing the disinfectant solution to enter the reverse osmosis membrane filter element to disinfect it. This allows for more thorough disinfection of the reverse osmosis membrane filter element after removing the dirt, further improving the user experience.

[0022] Furthermore, after the cleaning solution is discharged from the reverse osmosis membrane filter element, rinsing the reverse osmosis membrane filter element can remove the residual cleaning solution and dirt inside the reverse osmosis membrane filter element, preventing the cleaning solution from remaining inside the reverse osmosis membrane filter element. Similarly, after the disinfectant solution is discharged from the reverse osmosis membrane filter element, rinsing the reverse osmosis membrane filter element can remove the residual disinfectant solution inside the reverse osmosis membrane filter element, preventing the disinfectant solution from remaining inside the reverse osmosis membrane filter element.

[0023] Furthermore, by acquiring the current water quality parameters of the pure water end of the reverse osmosis membrane filter element and determining the water quality information of the pure water end based on the current water quality parameters, the pure water end of the reverse osmosis membrane filter element can be selectively connected to the pure water usage component. On the one hand, when the current water quality is poor, the pure water end of the reverse osmosis membrane filter element will not be connected to the pure water usage component, thereby helping to discharge water containing small amounts of detergent and / or bactericide from the pure water end of the reverse osmosis membrane filter element, thus helping to achieve zero additives and zero chemical pollution. On the other hand, when the current water quality is detected to be good, the pure water end of the reverse osmosis membrane filter element will be connected to the pure water usage component in a timely manner, thereby reducing water waste and further improving the user experience. Attached Figure Description

[0024] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0025] Figure 1 This is a schematic diagram of the structure of a first embodiment of the water purification device of the present invention;

[0026] Figure 2 This is a schematic diagram of the structure of a second embodiment of the water purification device of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of a third embodiment of the water purification device of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the water purification device of the present invention;

[0029] Figure 5 This is a flowchart of the control method for a water purification device according to the present invention;

[0030] Figure 6 This is a flowchart of an embodiment of the control method for a water purification device according to the present invention.

[0031] List of reference numerals in the attached diagram:

[0032] 1. Main water inlet pipe; 11. Inlet valve; 12. Booster pump; 2. Reverse osmosis membrane filter element; 21. Wastewater outlet pipe; 211. Wastewater valve; 212. Flushing water detection component; 22. Drain pipe; 221. Drain valve; 23. Return pipe; 231. Return valve; 301. Cleaning inlet; 302. Cleaning outlet; 311. First cleaning pipe; 312. First cleaning valve; 313. First cleaning agent storage component; 321. Second cleaning pipe; 322. Second cleaning valve; 323. Second cleaning agent storage component; 331. Sterilization pipe; 332. Sterilization valve; 333. Sterilizer storage component; 34. Check valve; 4. Pre-filter unit; 5. Pure water outlet pipe; 51. Pure water usage component; 52. Water quality detection component. Detailed Implementation

[0033] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0034] It should be noted that in the description of this invention, terms such as "upper," "lower," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly, for example, referring to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0036] In view of the problem mentioned in the background art that existing water purification equipment may have detergent residue after cleaning with cleaning components, resulting in a poor user experience, the present invention provides a water purification device.

[0037] like Figures 1 to 4As shown, the water purification device of the present invention includes a reverse osmosis membrane filter element 2 and a cleaning component. The cleaning component has a cleaning module and a sterilization module arranged in parallel. The cleaning agent module is used to store cleaning agent and can deliver cleaning liquid to the reverse osmosis membrane filter element 2 to remove dirt on the reverse osmosis membrane filter element 2. The sterilization module is used to store sterilizing agent and can deliver sterilization liquid to the reverse osmosis membrane filter element 2 to sterilize the reverse osmosis membrane filter element 2.

[0038] By configuring the cleaning component to include both a cleaning module and a sterilization module, the cleaning module can clean the reverse osmosis membrane filter element 2, removing the dirt attached to it and helping to extend its service life. Since the dirt contains a large number of microorganisms, the sterilization module sterilizes the cleaned reverse osmosis membrane filter element 2, preventing the growth of bacteria inside the filter element 2 from affecting the user's drinking water health and greatly improving the user experience.

[0039] It should be noted that, in practical applications, the present invention can first use the cleaning agent in the cleaning agent storage component to clean the reverse osmosis membrane filter element 2. After removing the dirt attached to the reverse osmosis membrane filter element 2, the bactericide in the bactericide storage component 333 can then be used to sterilize the reverse osmosis membrane filter element 2. This can thoroughly sterilize the cleaned reverse osmosis membrane filter element 2 and help regenerate it. Alternatively, the bactericide in the bactericide storage component 333 can be used periodically to sterilize the reverse osmosis membrane filter element 2, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0040] It should be noted that, in practical applications, this invention does not limit the manner in which the cleaning module and the sterilization module respectively supply cleaning liquid and sterilization liquid to the reverse osmosis membrane filter element 2. For example, the cleaning component can be configured to have a cleaning outlet 302, which is connected to the main water inlet 1 of the water purification equipment, and both the cleaning module and the sterilization module can be connected to the cleaning outlet 302. Alternatively, the reverse osmosis membrane filter element 2 can be configured to have two water inlets, and the cleaning component can have a cleaning outlet 302, wherein the main water inlet 1 and the cleaning outlet 302 are respectively connected to the two water inlets, etc. Such flexible adjustments and changes do not deviate from the principles and scope of this invention and should all be included within the protection scope of this invention.

[0041] Preferably, such as Figures 1 to 4 As shown, the water purification device of the present invention also includes a main water inlet 1, which is connected to the water inlet end of the reverse osmosis membrane filter element 2. The cleaning component has a cleaning outlet 302, which is connected to the main water inlet 1. Both the cleaning module and the sterilization module can be connected to the cleaning outlet 302.

[0042] It should be noted that, in practical applications, the present invention does not impose any limitations on the specific connection position between the cleaning outlet 302 and the main water inlet 1. For example, the cleaning outlet 302 can be set at the upstream end of the booster pump 12, or it can be set at the downstream end of the booster pump 12, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0043] Preferably, such as Figures 1 to 4 As shown, the water purification equipment of the present invention also includes a booster pump 12 installed on the main water inlet 1, and the booster pump 12 is located at the upstream end of the clean outlet 302.

[0044] Since cleaning solutions are mostly acidic or alkaline, and disinfectants are mostly oxidizing or reducing substances, the inventors have discovered through long-term research that both cleaning solutions and disinfectants can damage the diaphragm inside the booster pump 12, affecting its service life. By setting the booster pump 12 to be located upstream of the cleaning outlet 302, the cleaning solution or disinfectant can be prevented from flowing through the booster pump 12, thereby preventing the cleaning solution or disinfectant from corroding the diaphragm inside the booster pump 12 and helping to extend its service life.

[0045] It should be noted that in practical applications, the cleaning component can be configured to have only a cleaning outlet 302, with the cleaning liquid stored directly in the cleaning module and the disinfectant stored in the disinfection module. Alternatively, the cleaning component can also be configured to have a cleaning inlet 301, which is connected to the main water inlet 1. Water from the main water inlet 1 enters the cleaning module to dissolve the stored cleaning agent to form a cleaning liquid, and water from the main water inlet 1 enters the disinfection module to dissolve the stored disinfectant to form a disinfectant. Alternatively, the cleaning inlet 301 can be located on the cleaning module and / or the disinfection module, allowing the user to inject water into the cleaning inlet 301 to dissolve the cleaning agent or disinfectant. Such adjustments and changes to the specific configuration of the cleaning agent storage component and the disinfectant storage component 333 do not deviate from the principles and scope of this invention and should all be included within the protection scope of this invention.

[0046] Preferably, such as Figures 1 to 4 As shown, the cleaning component of the present invention also has a cleaning inlet 301, which is connected to the main water inlet 1. The cleaning module (or sterilization module) can be connected to the cleaning inlet 301. The cleaning inlet 301 is connected to the main water inlet 1 so that water in the main water inlet 1 enters the cleaning module (or sterilization module) to dissolve the cleaning agent (or sterilizer) and form a cleaning liquid (or sterilization liquid).

[0047] By configuring the cleaning component with both a cleaning inlet 301 and a cleaning outlet 302, compared to configuring the cleaning component with only a cleaning outlet 302, it is possible to avoid storing a large amount of cleaning fluid or disinfectant inside the cleaning component, which would result in an excessively large cleaning component and further improve the user experience.

[0048] Preferably, such as Figures 1 to 4 As shown, the cleaning module includes a cleaning pipeline, a cleaning valve installed on the cleaning pipeline, and a cleaning agent storage component. The cleaning agent storage component is located downstream of the cleaning valve and is used to store acidic or alkaline cleaning agents. The sterilization module includes a sterilization pipeline 331, a sterilization valve 332 installed on the sterilization pipeline 331, and a sterilization agent storage component 333. The sterilization agent storage component 333 is located downstream of the sterilization valve 332 and is used to store sterilization agents. The first end of the cleaning pipeline and the first end of the sterilization pipeline 331 intersect and are connected to the cleaning inlet 301. The second end of the cleaning pipeline and the second end of the sterilization pipeline 331 intersect and are connected to the cleaning outlet 302.

[0049] It should be noted that the arrangement is not limited to the first end of the cleaning pipeline and the first end of the sterilization pipeline 331 converging and connecting to the cleaning inlet 301, or the second end of the cleaning pipeline and the second end of the sterilization pipeline 331 converging and connecting to the cleaning outlet 302. For example, the cleaning pipeline and the sterilization pipeline 331 can also be configured as two independent pipelines, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention. Of course, preferably, the first end of the cleaning pipeline and the first end of the sterilization pipeline 331 converging and connecting to the cleaning inlet 301, and the second end of the cleaning pipeline and the second end of the sterilization pipeline 331 converging and connecting to the cleaning outlet 302.

[0050] It should be noted that, in practical applications, those skilled in the art can set the number of cleaning pipelines to only one, or the number of cleaning pipelines to two, with two cleaning valves and two cleaning agent storage components, each corresponding to one of the cleaning pipelines; or the number of cleaning pipelines to multiple, with multiple cleaning valves and multiple cleaning agent storage components, each corresponding to one of the cleaning pipelines, and so on. Such adjustments and changes to the specific number of cleaning pipelines, cleaning valves, and cleaning agent storage components do not deviate from the principles and scope of this invention and should all be included within the protection scope of this invention.

[0051] For example, such as Figure 1 and Figure 3 As shown, the cleaning module includes a first cleaning pipe 311, a first cleaning valve 312 disposed on the first cleaning pipe 311, and a first cleaning agent storage component 313.

[0052] Preferably, there are at least two cleaning pipelines and multiple cleaning pipelines are arranged in parallel. The cleaning valve and the cleaning agent storage component are arranged one-to-one with the cleaning pipeline. The cleaning agent storage component on different cleaning pipelines is used to store different types of cleaning agents.

[0053] This design allows for the storage of different types of cleaning agents in the storage components of different cleaning pipelines, enabling a more thorough cleaning of the reverse osmosis membrane filter element 2 and improving the cleaning effect.

[0054] The following will use two cleaning pipelines as examples for introduction.

[0055] like Figure 2 and Figure 4 As shown, the cleaning module includes a first cleaning pipe 311 and a second cleaning pipe 321 arranged in parallel, a first cleaning valve 312 and a first cleaning agent storage component 313 disposed on the first cleaning pipe 311, and a second cleaning valve 322 and a second cleaning agent storage component 323 disposed on the second cleaning pipe 321. The first cleaning agent storage component 313 is used to store acidic cleaning agent, and the second cleaning agent storage component 323 is used to store alkaline cleaning agent.

[0056] It should be noted that the present invention does not limit the specific type of acidic cleaning agent. For example, the acidic cleaning agent can be at least one of malic acid, citric acid, hydrochloric acid, and phosphoric acid. Of course, the acidic cleaning agent can also be other types of acidic solutions, and those skilled in the art can make adjustments according to actual needs.

[0057] Preferably, the acidic cleaning agent is malic acid or citric acid, which not only cleans dirt but also has a good disinfection and antibacterial effect, and can disinfect and inhibit bacteria on the reverse osmosis membrane filter element 2.

[0058] It should also be noted that the present invention does not limit the specific type of alkaline cleaning agent. For example, the alkaline cleaning agent can be set to at least one of dishwashing powder, baking soda, sodium hydroxide, potassium hydroxide, calcium hydroxide, calcium oxide, sodium citrate, tetrasodium ethylenediaminetetraacetate, sodium dodecyl sulfate, sodium disulfite, and sodium bisulfite. Of course, the second cleaning liquid can also be other types of alkaline solutions, and those skilled in the art can make adjustments according to actual needs.

[0059] Specifically, when cleaning the reverse osmosis membrane filter element 2, the first cleaning valve 312 (or the second cleaning valve 322) is opened, allowing water in the main inlet 1 to enter the cleaning agent storage component 33 through the cleaning inlet 301. The cleaning agent in the first cleaning agent storage component 313 (or the second cleaning agent storage component 323) is dissolved to form a cleaning solution, which is then transported to the reverse osmosis membrane filter element 2 through the cleaning outlet 302. The reverse osmosis membrane filter element 2 is soaked in the cleaning solution, which acts on the dirt on the reverse osmosis membrane filter element 2 to clean off the dirt.

[0060] It should be noted that when cleaning the reverse osmosis membrane filter element 2, an acidic cleaning agent can be used first, followed by an alkaline cleaning agent. Alternatively, an alkaline cleaning agent can be used first, followed by an acidic cleaning agent, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of this invention and should be included within the protection scope of this invention.

[0061] The following example illustrates the cleaning process of reverse osmosis membrane filter element 2, which involves first cleaning it with an acidic cleaning agent and then with an alkaline cleaning agent.

[0062] like Figure 2 and Figure 4 As shown, the first cleaning valve 312 is opened while the second cleaning valve 322 remains closed, allowing water from the main inlet channel 1 to enter the first cleaning pipe 311 and form a first cleaning solution (i.e., an acidic solution) in the first cleaning agent storage component 313. This solution is then discharged through the cleaning outlet 302 and transported to the reverse osmosis membrane filter element 2 to soak the reverse osmosis membrane filter element 2 and remove inorganic dirt from it. After cleaning, the liquid in the reverse osmosis membrane filter element 2 is drained and rinsed. Then, the first cleaning valve 312 is closed and the second cleaning valve 322 is opened, allowing water from the main inlet channel 1 to enter the second cleaning pipe 321 and form a second cleaning solution (i.e., an alkaline solution) in the second cleaning agent storage component 323. This solution is then discharged through the cleaning outlet 302 and transported to the reverse osmosis membrane filter element 2 to soak the reverse osmosis membrane filter element 2 and remove organic dirt from it.

[0063] It should also be noted that, in practical applications, those skilled in the art can set the number of sterilization pipelines 331 to one, or the number of sterilization pipelines 331 to two, with the two sterilization pipelines 331 connected in parallel, and the sterilization valve 332 and the bactericide storage component 333 each corresponding to one sterilization pipeline 331. Alternatively, the number of sterilization pipelines 331 can be set to multiple, with multiple sterilization pipelines 331 connected in parallel, and the sterilization valve 332 and the bactericide storage component 333 each corresponding to one sterilization pipeline 331, etc. Such adjustments and changes to the specific number of sterilization pipelines 331 do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0064] Preferably, there are at least two sterilization pipelines 331, and multiple sterilization pipelines 331 are arranged in parallel. The sterilization valve 332 and the sterilizing agent storage component 333 are arranged in a one-to-one correspondence with the sterilization pipelines 331.

[0065] This setup allows the sterilization component to use different types of sterilizing agents to clean the reverse osmosis membrane filter element 2, thereby improving the sterilization effect on the reverse osmosis membrane filter element 2.

[0066] It should be noted that the present invention does not limit the specific type of bactericide. For example, the bactericide can be at least one of hydrogen peroxide, peracetic acid, copper sulfate, formaldehyde, sodium bisulfite and sodium hypochlorite, etc. Such adjustments and changes to the specific type of bactericide do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0067] Preferably, the bactericide includes at least one of hydrogen peroxide, peracetic acid, copper sulfate, formaldehyde, sodium bisulfite, and sodium hypochlorite.

[0068] For example, the bactericide is a mixture of hydrogen peroxide and peracetic acid.

[0069] Preferably, such as Figures 1 to 4 As shown, the cleaning assembly also includes a one-way valve 34 disposed on the cleaning line and / or sterilization line 331. The one-way valve 34 is disposed between the cleaning outlet 302 and the cleaning agent storage component and / or sterilization agent storage component 333 and can prevent water downstream of the cleaning agent storage component and / or sterilization agent storage component 333 from flowing back into the cleaning agent storage component and / or sterilization agent storage component 333.

[0070] By setting a one-way valve 34, when the water purification equipment is in normal water production mode, it can prevent water in the main inlet pipe 1 from flowing back through the cleaning outlet 302 into the cleaning agent storage component and / or the disinfectant storage component 333, thereby preventing the cleaning agent and disinfectant from dissolving prematurely. At the same time, when the cleaning module cleans the reverse osmosis membrane filter element 2, the one-way valve 34 on the disinfection pipeline 331 can also prevent the cleaning liquid from flowing back into the disinfectant storage component 333, thereby preventing the disinfectant from dissolving prematurely. When the disinfection module disinfects the reverse osmosis membrane filter element 2, the one-way valve 34 on the cleaning pipeline can also prevent the disinfectant liquid from flowing back into the cleaning agent storage component, thereby preventing the cleaning agent from dissolving prematurely. This helps to improve the storage time of the cleaning agent and disinfectant and avoids affecting the subsequent cleaning or disinfection effect.

[0071] It should be noted that in practical applications, the method is not limited to preventing premature dissolution of the cleaning agent or disinfectant by setting a one-way valve 34. For example, a check valve structure can be set in the cleaning agent storage component 33 to prevent water in the main water inlet 1 from entering the cleaning agent storage component 33 through the cleaning outlet 302, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention. Of course, it is preferable to prevent premature dissolution of the cleaning agent or disinfectant by setting a one-way valve.

[0072] Preferably, such as Figures 1 to 4 As shown, the water purification device of the present invention also includes a pre-filter unit 4, the 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.

[0073] With this configuration, by placing the cleaning inlet 301 downstream of the pre-filter unit 4, the purified water filtered by the pre-filter unit 4 can enter the cleaning agent storage component 33 (or disinfectant storage component 333) through the cleaning inlet 301. The purified water filtered by the pre-filter unit 4 is used to dissolve the cleaning agent (or disinfectant), improving the solubility of the cleaning agent (or disinfectant) and the cleanliness of the cleaning solution (or disinfectant), thereby effectively improving the cleaning effect (or disinfection effect) of the reverse osmosis membrane filter element 2.

[0074] It should be noted that, in practical applications, those skilled in the art can set the pre-filter unit 4 as a pre-filter cartridge, or they can set the pre-filter unit 4 as a composite cartridge including a pre-filter cartridge and a post-filter cartridge, etc. Such adjustments and changes to the specific type of the pre-filter unit 4 do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0075] Preferably, the pre-filter unit 4 is a pre-filter cartridge.

[0076] Preferably, such as Figures 1 to 4 As shown, the water purification equipment also includes an inlet valve 11 installed on the main inlet water line 1, with a cleaning inlet 301 located at the upstream end of the inlet valve 11 and a cleaning outlet 302 located at the downstream end of the inlet valve 11.

[0077] With this setup, when the reverse osmosis membrane filter element 2 needs to be cleaned, the water in the main water inlet 1 can be prevented from directly entering the reverse osmosis membrane filter element 2 by controlling the water inlet valve 11, thereby avoiding dilution of the cleaning solution entering the reverse osmosis membrane filter element 2.

[0078] It should be noted that in practical applications, the arrangement is not limited to placing the cleaning inlet 301 upstream of the inlet valve 11 and the cleaning outlet 302 downstream of the inlet valve 11. For example, both the cleaning inlet 301 and the cleaning outlet 302 can be placed upstream of the inlet valve 11, or both can be placed downstream of the inlet valve 11, and so on. Such adjustments and changes to the relative positions of the cleaning components and the inlet valve 11 do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention. Preferably, the cleaning inlet 301 is placed upstream of the inlet valve 11, and the cleaning outlet 302 is placed downstream of the inlet valve 11.

[0079] It should also be noted that, in practical applications, those skilled in the art can place the booster pump 12 upstream of the inlet valve 11, or they can place the booster pump 12 downstream of the inlet valve 11, etc. Such adjustments and changes to the specific positions of the booster pump 12 and the inlet valve 11 do not deviate from the principles and scope of the present invention, and should all be included within the protection scope of the present invention.

[0080] Preferably, such as Figures 1 to 4 As shown, the booster pump 12 is located upstream of the inlet valve 11, and the cleaning inlet 301 is located between the booster pump 12 and the inlet valve 11.

[0081] By placing the booster pump 12 upstream of the inlet valve 11 and placing the cleaning inlet 301 between the booster pump 12 and the inlet valve 11, the cleaning inlet 301 can be located downstream of the booster pump 12. This facilitates the pumping of water from the main inlet channel 1 into the cleaning assembly and then into the reverse osmosis membrane filter element 2 via the booster pump 12, thereby improving cleaning efficiency and cleaning effect.

[0082] Preferably, such as Figures 1 to 4 As shown, the water purification device of the present invention also includes a pure water outlet pipe 5 and a pure water user component 51. The pure water end of the reverse osmosis membrane filter element 2 is connected to the pure water user component 51 through the pure water outlet pipe 5.

[0083] It should be noted that, in practical applications, those skilled in the art can directly configure the pure water component 51 as a water outlet component (such as a faucet or spout), with the filtered pure water flowing out from the faucet or spout for user use. Alternatively, the pure water component 51 can be configured as a post-filter, with the filtered pure water flowing into the post-filter to improve the taste for user use. Or, the pure water component 51 can be configured as a pure water tank, with the pure water filtered by the reverse osmosis membrane filter 2 flowing into the pure water tank for storage for user use, and so on. Such adjustments and changes to the specific configuration of the pure water component 51 do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0084] Preferably, the pure water component 51 is a post-filter.

[0085] Preferably, the water purification device of the present invention further includes an auxiliary cleaning component (not shown in the figure), which is configured to promote the interaction between the cleaning liquid and the dirt on the reverse osmosis membrane filter element 2, thereby removing the dirt from the reverse osmosis membrane filter element 2.

[0086] By setting up auxiliary cleaning components, it is easier for the cleaning solution to react physically or chemically with the dirt on the reverse osmosis membrane filter element 2, thereby making it easier to remove the dirt from the reverse osmosis membrane filter element 2, further improving the cleaning efficiency and cleaning effect of the reverse osmosis membrane filter element 2, and further enhancing the user experience.

[0087] It should be noted that, in practical applications, the present invention does not limit the specific type of auxiliary cleaning components, as long as they can promote the interaction between the cleaning liquid and the dirt on the reverse osmosis membrane filter element 2, thereby removing the dirt from the reverse osmosis membrane filter element 2.

[0088] In one specific embodiment, the auxiliary cleaning component includes a heating module, wherein the heating module is disposed on the cleaning circuit.

[0089] This setup allows hot cleaning fluid to be delivered into the reverse osmosis membrane filter element 2, promoting the interaction between the cleaning fluid and the dirt on the reverse osmosis membrane filter element 2, thereby aiding in the removal of dirt. In addition, the heating module also helps dissolve the cleaning agent, thereby increasing the dissolution rate and solubility of the cleaning agent, further enhancing the user experience.

[0090] It should be noted that the present invention does not limit the specific location of the heating module in the cleaning circuit. For example, the heating module can be set on the cleaning pipeline, or on the circulation pipe, or it can be set outside the cleaning agent storage component 33, etc. Such adjustments and changes to the specific location of the heating module do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0091] In another specific embodiment, the auxiliary cleaning component includes an ultrasonic module, wherein the ultrasonic module is disposed outside the reverse osmosis membrane filter element 2 and is capable of causing the reverse osmosis membrane filter element 2 to vibrate at high frequency and low amplitude, which helps to remove dirt from the reverse osmosis membrane filter element 2.

[0092] In another specific embodiment, the auxiliary cleaning component includes a bubble generator, which is capable of generating bubbles that promote the interaction of the cleaning fluid with the dirt on the reverse osmosis membrane filter element 2, thereby aiding in the removal of dirt.

[0093] In a second aspect, the present invention also provides a control method for a water purification device.

[0094] Specifically, such as Figure 5 As shown, the control method of the present invention includes the following steps:

[0095] S1: The cleaning module delivers cleaning fluid to the reverse osmosis membrane filter element 2;

[0096] S2: Soak the reverse osmosis membrane filter element 2 in the cleaning solution for a first preset time, and then discharge the cleaning solution from the reverse osmosis membrane filter element 2;

[0097] S3: The sterilization module delivers sterilization solution to the reverse osmosis membrane filter element 2;

[0098] S4: Soak the reverse osmosis membrane filter element 2 in the sterilizing solution for a second preset time, and then discharge the sterilizing solution from the reverse osmosis membrane filter element 2.

[0099] With this setup, the cleaning agent storage component is first connected to the inlet of the reverse osmosis membrane filter element 2, allowing the cleaning solution to be delivered into the reverse osmosis membrane filter element 2 for cleaning. After cleaning, the disinfectant storage component 333 is then connected to the inlet of the reverse osmosis membrane filter element 2, allowing the disinfectant solution to enter the reverse osmosis membrane filter element 2 for disinfection. This allows for more thorough disinfection of the reverse osmosis membrane filter element 2 after removing the dirt, further enhancing the user experience.

[0100] It should be noted that, in practical applications, the present invention does not impose any limitations on the specific method of setting and determining the first preset time. For example, the first preset time can be determined by the duration entered by the user on the control panel, or it can be determined based on the operating parameters of the water purifier. Alternatively, the first preset time can be set to a fixed duration and embedded in the controller of the water purifier, and the first preset time can be obtained by acquiring the data embedded in the controller, etc. Such adjustments and changes to the specific setting type of the first preset time do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0101] Preferably, before immersing the reverse osmosis membrane filter element 2 in the cleaning solution, the control method of the present invention further includes the following steps:

[0102] Obtain the operating parameters of the water purification equipment;

[0103] Determine the first preset time based on the operating parameters;

[0104] The operating parameters include at least one of the following: the influent water quality of the reverse osmosis membrane filter element 2, the total water production of the reverse osmosis membrane filter element 2, the cumulative operating time of the water purification equipment, the duration during which the pure water-to-waste ratio of the reverse osmosis membrane filter element 2 is higher than the set pure water-to-waste ratio, the duration of continuous water production of the reverse osmosis membrane filter element 2 after the pre-filter element reaches the end of its service life, the pure water flow rate of the reverse osmosis membrane filter element 2, and the pressure difference between the membrane and the membrane of the reverse osmosis membrane filter element 2.

[0105] By setting the first preset time according to the operating parameters of the water purification equipment, the degree of dirtiness of the reverse osmosis membrane filter element 2 can be assessed based on the operating parameters. Then, the cleaning time of the cleaning solution on the reverse osmosis membrane filter element 2 can be determined according to the degree of dirtiness. On the one hand, it can avoid the problem of incomplete cleaning due to insufficient cleaning time caused by high degree of dirtiness of the reverse osmosis membrane filter element 2. On the other hand, it can avoid the problem of energy waste caused by excessive cleaning time caused by low degree of dirtiness of the reverse osmosis membrane filter element 2.

[0106] It should be noted that, in practical applications, those skilled in the art can determine the first preset duration based on only one of the above-mentioned multiple operating parameters, or they can determine the first preset duration based on some of the above-mentioned multiple operating parameters, etc. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0107] Preferably, the step of "determining the first preset time based on the operating parameters" specifically includes:

[0108] Based on the first operating parameters, predict the fouling level A of the reverse osmosis membrane filter element 2;

[0109] Based on the second operating parameter, determine the degree of fouling B of the reverse osmosis membrane filter element 2;

[0110] The first preset time is determined based on the degree of pollution A and the degree of blockage B.

[0111] Specifically, the step of "determining the first preset time based on the degree of pollution A and the degree of blockage B" includes:

[0112] Compare pollution level A with the preset pollution level A1;

[0113] Compare the degree of fouling B with the preset degree of fouling B1;

[0114] If A < A1 and B < B1, then the first preset time is T1;

[0115] If A < A1 and B > B1, or A > A1 and B < B1, then the first preset time is T2;

[0116] If A > A1 and B > B1, then the first preset time is T3;

[0117] Where T1 < T2 < T3.

[0118] The first operating parameter can predict the degree of fouling that the reverse osmosis membrane filter element 2 may be. The second operating parameter can reflect the degree of clogging that the reverse osmosis membrane filter element 2 is. Based on the degree of fouling and clogging, the soaking time of the cleaning solution on the reverse osmosis membrane filter element 2 can be accurately determined to ensure that the reverse osmosis membrane filter element 2 can be cleaned.

[0119] It should be noted that, in practical applications, the present invention does not impose any limitations on the specific method of setting and determining the second preset time. For example, the second preset time can be determined by the duration entered by the user on the control panel, or it can be determined based on the water quality information of the cleaning liquid when it is discharged from the reverse osmosis membrane filter element 2. Alternatively, the second preset time can be set to a fixed duration and embedded in the controller of the water purification equipment, and the second preset time can be obtained by acquiring the data embedded in the controller, etc. Such adjustments and changes to the specific setting type of the second preset time do not deviate from the principle and scope of the present invention and should all be included within the protection scope of the present invention.

[0120] Preferably, during the process of discharging the cleaning solution from the reverse osmosis membrane filter element 2, the control method further includes the following steps:

[0121] Obtain water quality information for the cleaning solution;

[0122] Based on water quality information, determine the second preset time.

[0123] With this setup, after the cleaning solution has finished cleaning the reverse osmosis membrane filter element 2, all the dirt on the reverse osmosis membrane filter element 2 enters the cleaning solution and is discharged from the reverse osmosis membrane filter element 2. By obtaining the water quality information of the cleaning solution, the amount of dirt that has fallen off the reverse osmosis membrane filter element 2 can be determined. Then, based on the actual pollution level of the reverse osmosis membrane filter element 2, the sterilization time of the sterilizing solution on the reverse osmosis membrane filter element 2 can be determined, thereby sterilizing the reverse osmosis membrane filter element 2 more effectively.

[0124] It should be noted that those skilled in the art can set the water quality information to TDS value, or to turbidity, or to include both TDS value and turbidity, etc. Such adjustments and changes to the specific settings of water quality information do not deviate from the principles and scope of this invention and should be included within the protection scope of this invention.

[0125] Preferably, the water quality information includes turbidity values, and the step of "determining the second preset time based on the water quality information" specifically includes:

[0126] The second preset time is determined based on the turbidity value of the cleaning solution.

[0127] It should be noted that, as Figures 1 to 4 As shown, a turbidity sensor 63 is installed in the circulation loop to detect the turbidity value of the cleaning liquid in the circulation loop.

[0128] It should be noted that in practical applications, the turbidity value can be compared with a preset turbidity, and the second preset time can be determined based on the comparison result. Alternatively, the difference between the turbidity value and the preset turbidity can be calculated first, and then the difference can be compared with the preset value. Based on the comparison result, the second preset time can be determined. Or, the ratio between the turbidity value and the preset turbidity can be calculated first, and then the ratio can be compared with the preset value. Based on the comparison result, the second preset time can be determined, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of this invention and should all be included within the protection scope of this invention.

[0129] Preferably, the step of "determining the second preset time based on the turbidity value" specifically includes:

[0130] Calculate the difference Δ = F - F0;

[0131] The difference Δ is compared with the first preset value A1 and the second preset value A2 respectively;

[0132] Based on the comparison results, a second preset time is determined;

[0133] Where 0 < A1 < A2.

[0134] Preferably, the step of "determining the second preset time based on the comparison results" specifically includes:

[0135] If △ < A1, then the second preset duration is t1;

[0136] If A1≤△≤A2, then the second preset duration is t2;

[0137] If △>A2, then the second preset duration is t3;

[0138] Where t1 < t2 < t3.

[0139] Preferably, after the cleaning solution and / or disinfectant solution are discharged from the reverse osmosis membrane filter element 2, the control method of the present invention further includes the following steps:

[0140] The water purification equipment supplies water to the reverse osmosis membrane filter element 2 to flush the reverse osmosis membrane filter element 2;

[0141] The flushing water is discharged from the reverse osmosis membrane filter element 2.

[0142] With this setup, after the cleaning solution is discharged from the reverse osmosis membrane filter element 2, rinsing the reverse osmosis membrane filter element 2 can remove the residual cleaning solution and dirt inside the reverse osmosis membrane filter element 2, preventing the cleaning solution from remaining inside the reverse osmosis membrane filter element 2. Similarly, after the disinfectant solution is discharged from the reverse osmosis membrane filter element 2, rinsing the reverse osmosis membrane filter element 2 can remove the residual disinfectant solution inside the reverse osmosis membrane filter element 2, preventing the disinfectant solution from remaining inside the reverse osmosis membrane filter element 2.

[0143] Preferably, such as Figures 1 to 4 As shown, the water purification equipment of the present invention also includes a wastewater outlet pipe 21 and a wastewater valve 211 installed on the wastewater outlet pipe 21. When it is necessary to clean or sterilize the reverse osmosis membrane filter element 2, the wastewater valve 211 can prevent the cleaning liquid or sterilizing liquid in the reverse osmosis membrane filter element 2 from flowing out through the wastewater outlet pipe 21. When rinsing the reverse osmosis membrane filter element 2, the rinsing water can be discharged through the wastewater outlet pipe 21.

[0144] Preferably, the water purification equipment further includes an impurity collection component (not shown in the figure) installed on the wastewater outlet pipe 21. The impurity collection component is located upstream of the wastewater valve 211 and is used to collect impurities in the cleaning liquid flowing out from the wastewater end of the reverse osmosis membrane filter element 2.

[0145] With this setup, after the cleaning solution finishes cleaning the reverse osmosis membrane filter element 2, when the dirt is discharged from the wastewater outlet pipe 21 along with the cleaning solution, the dirt can be collected by the impurity collection component, preventing the dirt from clogging the wastewater valve 211 and extending the service life of the wastewater valve 211.

[0146] It should be noted that rinsing of the reverse osmosis membrane filter element 2 can be stopped when the set rinsing time is reached. Alternatively, the water quality parameters of the rinsing water can be obtained, and the rinsing of the reverse osmosis membrane filter element 2 can be selectively stopped based on the water quality parameters. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0147] Preferably, after the water purification equipment starts flushing the reverse osmosis membrane filter element 2, the control method of the present invention further includes the following steps:

[0148] Real-time acquisition of actual water quality parameters of flushing water;

[0149] Based on the water quality parameters of the flushing water, selectively stop flushing the reverse osmosis membrane filter element 2.

[0150] With this setting, it is possible to determine whether the reverse osmosis membrane filter element 2 has been rinsed completely based on the actual water quality parameters of the rinsing water. This not only avoids the problem of not being able to rinse the reverse osmosis membrane filter element 2 clean due to too short a rinsing time, but also avoids the problem of wasting water due to too long a rinsing time.

[0151] It should be noted that the actual water quality parameter can be set to the TDS value of the flushing water, or the actual water quality parameter can be set to the pH value of the flushing water, etc. Such flexible adjustment and change does not deviate from the principle and scope of the present invention, and should be included within the protection scope of the present invention.

[0152] Preferably, the actual water quality parameter is the actual TDS value of the flushing water, and a flushing water detection component 212 is provided on the wastewater outlet pipe 21 to detect the actual TDS value of the flushing water.

[0153] Specifically, the step of "selectively stopping the flushing of reverse osmosis membrane filter element 2 based on actual water quality parameters" includes:

[0154] Compare the actual TDS value with the set TDS value;

[0155] If the actual TDS value is greater than or equal to the set TDS value, the rinsing of the reverse osmosis membrane filter element 2 will not be stopped.

[0156] If the actual TDS value is less than the set TDS value, then stop flushing the reverse osmosis membrane filter element 2.

[0157] With this setting, when the actual TDS value is greater than or equal to the set TDS value, it indicates that the quality of the flushing water is still poor, meaning that there is still detergent or disinfectant residue. In this case, the flushing of the reverse osmosis membrane filter element 2 should not be stopped, as the residual detergent or disinfectant in the reverse osmosis membrane filter element 2 can continue to be discharged. When the actual TDS value is less than the set TDS value, it indicates that the quality of the flushing water is good. In this case, the flushing of the reverse osmosis membrane filter element 2 should be stopped in time to avoid wasting water.

[0158] Preferably, such as Figure 6 As shown, after the sterilization module finishes sterilizing the reverse osmosis membrane filter element 2 and the reverse osmosis membrane filter element 2 resumes water production mode, the control method of the present invention further includes the following steps:

[0159] S5: Obtain the current water quality parameters of the pure water end of reverse osmosis membrane filter element 2;

[0160] S6: Based on the current water quality parameters, selectively connect the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51.

[0161] With this setup, when cleaning the reverse osmosis membrane filter element 2, a small amount of cleaning agent will permeate to the pure water end of the reverse osmosis membrane filter element 2; when sterilizing the reverse osmosis membrane filter element 2, a small amount of disinfectant will permeate to the pure water end of the reverse osmosis membrane filter element 2. By acquiring the current water quality parameters of the pure water end of the reverse osmosis membrane filter element 2 and determining the water quality information of the pure water end of the reverse osmosis membrane filter element 2 based on the current water quality parameters, the pure water end of the reverse osmosis membrane filter element 2 can be selectively connected to the pure water component 51. On the one hand, when the current water quality is poor, the pure water end of the reverse osmosis membrane filter element 2 is not connected to the pure water component 51, which helps to discharge water containing a small amount of detergent and / or bactericide from the pure water end of the reverse osmosis membrane filter element 2, thereby helping to achieve zero additives and zero chemical pollution. On the other hand, when the current water quality is detected to be good, the pure water end of the reverse osmosis membrane filter element 2 is connected to the pure water component 51 in a timely manner, which can reduce the waste of water resources and further improve the user experience.

[0162] It should be noted that, in practical applications, those skilled in the art can obtain the current water quality parameters by setting up a water quality detection component and obtaining the detection value of the water quality detection component, or by connecting water from the pure water outlet pipe 5 and detecting its water quality, etc. Such adjustments and changes to the specific method of obtaining the current water quality parameters do not deviate from the principle and scope of the present invention and should all be included within the protection scope of the present invention.

[0163] Preferably, such as Figures 1 to 4 As shown, the present invention also includes a water quality detection component 52, which is used to detect the current water quality parameters in the pure water outlet pipe 5.

[0164] It should be noted that, in practical applications, those skilled in the art can set the current water quality parameter to the current TDS value, or the current pH value, or any other possible form, etc. Such adjustments and changes to the specific setting type of the current water quality parameter do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0165] Preferably, such as Figure 6 As shown, the current water quality parameters include the current TDS value. The specific steps of "selectively connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51 according to the current water quality parameters" include:

[0166] S61: Compare the current TDS value with the preset TDS value;

[0167] S62: Based on the comparison results, selectively connect the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51.

[0168] With this setting, it is possible to more directly determine whether the small amount of detergent and disinfectant remaining in the reverse osmosis membrane filter 2 has been completely discharged based on the current TDS value and the preset TDS value. This allows for a more accurate determination of whether to connect the pure water end of the reverse osmosis membrane filter 2 to the pure water component 51, further enhancing the user experience.

[0169] It should be noted that in practical applications, the connection is not limited to comparing the current TDS value with a preset TDS value. Based on the comparison result, the pure water end of the reverse osmosis membrane filter element 2 is selectively connected to the pure water component 51. For example, the difference between the current TDS value and the preset TDS value can be calculated first, and then compared with the preset value. Based on the comparison result, the pure water end of the reverse osmosis membrane filter element 2 can be selectively connected to the pure water component 51. Alternatively, the ratio between the current TDS value and the preset TDS value can be calculated first, and then compared with the preset value. Based on the comparison result, the pure water end of the reverse osmosis membrane filter element 2 can be selectively connected to the pure water component 51, and so on. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention. Of course, preferably, the current TDS value is compared with the preset TDS value, and based on the comparison result, the pure water end of the reverse osmosis membrane filter element 2 is selectively connected to the pure water component 51.

[0170] It should be noted that, in practical applications, those skilled in the art can obtain the preset TDS value based on the information entered by the user on the control panel of the water purifier, or the preset water quality parameters can be pre-embedded in the controller of the water purifier, and the preset TDS value can be obtained through the information embedded in the controller, etc. Such adjustments and changes to the specific method of obtaining the preset TDS value do not deviate from the principle and scope of the present invention, and should all be included within the protection scope of the present invention.

[0171] Preferably, a preset TDS value is pre-embedded in the controller of the water purification equipment, and the preset TDS value is obtained through the information embedded in the controller.

[0172] Preferably, such as Figure 6 As shown, the step of "selectively connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51 based on the comparison results" specifically includes:

[0173] S621: If the current TDS value is greater than the preset TDS value, then the pure water end of the reverse osmosis membrane filter element 2 will not be connected to the pure water use component 51.

[0174] S622: If the current TDS value is less than or equal to the preset TDS value, then connect the pure water end of the reverse osmosis membrane filter element 2 to the pure water component 51.

[0175] With this setting, when the current TDS value is greater than the preset TDS value, it indicates that the TDS value of the pure water end of the reverse osmosis membrane filter element 2 is still high, meaning that a small amount of detergent or disinfectant still exists at the pure water end of the reverse osmosis membrane filter element 2. In this case, not connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water component 51 makes it easier to discharge the small amount of detergent or disinfectant remaining at the pure water end of the reverse osmosis membrane filter element 2, thus helping to achieve zero chemical addition and greatly improving the user experience. When the current TDS value is less than or equal to the preset TDS value, it indicates that the TDS value of the pure water end of the reverse osmosis membrane filter element 2 is not greater than the preset water quality parameter. In this case, connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water component 51 can, on the one hand, avoid water waste and help extend the service life of the reverse osmosis membrane filter element 2; on the other hand, it can also avoid affecting the normal use of the water purification equipment.

[0176] It should be noted that, without connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water usage component 51, the pure water end of the reverse osmosis membrane filter element 2 can be connected to the wastewater outlet pipe 21. This allows water containing a small amount of detergent or disinfectant residue from the pure water end of the reverse osmosis membrane filter element 2 to be discharged to the outside of the water purification equipment through the wastewater outlet pipe 21. Alternatively, the pure water end of the reverse osmosis membrane filter element 2 can be connected to the drain pipe in the user's usage scenario, allowing the pure water end of the reverse osmosis membrane filter element 2 to contain a small amount of detergent or disinfectant. The residual water can be directly discharged into the sewer pipe. Alternatively, the pure water end of the reverse osmosis membrane filter element 2 can be connected to the upstream end of the booster pump 12, so that the water containing a small amount of detergent or bactericide residue at the pure water end of the reverse osmosis membrane filter element 2 is transported to the inlet end of the reverse osmosis membrane filter element 2 by the booster pump 12, and after multiple filtrations, the detergent or bactericide at the pure water end of the reverse osmosis membrane filter element 2 is discharged. Such flexible adjustments and changes do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0177] The following two embodiments will be described in detail.

[0178] The following is combined Figures 1 to 4 The following two scenarios will be used to illustrate this.

[0179] Scenario 1:

[0180] like Figure 3 and Figure 4 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 wastewater outlet pipe 21. The drain valve 221 is installed on the drain pipe 22 and is used to control the opening and closing of the drain pipe 22.

[0181] With this setup, after cleaning the reverse osmosis membrane filter element 2, first open the drain valve 221 to allow the water from the pure water end of the reverse osmosis membrane filter element 2 to flow into the wastewater outlet pipe 21 through the drain pipe 22. After the pure water containing the cleaning agent is completely discharged, close the drain valve 221 to allow the water from 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. This prevents the pure water containing the cleaning agent from entering the pure water use component 51.

[0182] Wastewater outlet pipe 21 is also equipped with wastewater valve 211. When it is necessary to clean or sterilize the reverse osmosis membrane filter element 2, the wastewater valve 211 can prevent the cleaning liquid or sterilizing liquid in the reverse osmosis membrane filter element 2 from flowing out through the wastewater outlet pipe 21.

[0183] Scenario 2:

[0184] like Figure 1 and Figure 2As shown, the water purification equipment also includes a return pipe 23 and a return valve 231. One end of the return pipe 23 is connected to the pure water outlet pipe 5, and the other end of the return pipe 23 is connected to the upstream end of the booster pump 12. The return valve 231 is installed on the return pipe 23 and is used to control the opening and closing of the return pipe 23.

[0185] With this setup, on the one hand, after cleaning the reverse osmosis membrane filter 2, the pure water containing detergent from the pure water end of the reverse osmosis membrane filter 2 can be discharged to the upstream end of the booster pump 12 for further filtration through the reverse osmosis membrane filter 2, preventing users from drinking 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 2 may experience an increase in the TDS value of the first cup of water. The "first cup of water" can also be returned to the upstream end of the booster pump 12 through the return pipe 23, preventing users from drinking water with a high TDS value.

[0186] It should be noted that the cleaning agent or disinfectant that permeates to the pure water end of the reverse osmosis membrane filter 2 will not damage the diaphragm of the booster pump 12 due to its low concentration.

[0187] It should also be noted that although the present invention is described in the above two cases, it is not restrictive. For example, the other end of the drain pipe 22 can be directly connected to the drain pipe or the wastewater outlet of the water purification equipment, and pure water containing detergent can be directly discharged to the drain pipe or the wastewater outlet of the water purification equipment.

[0188] It should be noted that, in practical applications, those skilled in the art can configure the water purification device as a water purifier, or as an integrated water purifier and drinking water machine, or as any other possible type, etc. Such adjustments and changes to the specific configuration type of the water purification device do not deviate from the principles and scope of the present invention and should all be included within the protection scope of the present invention.

[0189] For example, the water purification device is a water purifier.

[0190] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A water purification device, characterized in that, The water purification equipment includes a reverse osmosis membrane filter element and a cleaning component, wherein the cleaning component has a cleaning module and a sterilization module. The cleaning module is used to store cleaning agent and can deliver cleaning liquid to the reverse osmosis membrane filter element to remove dirt from the reverse osmosis membrane filter element. The sterilization module is used to store sterilizing agent and can deliver sterilization liquid to the reverse osmosis membrane filter element to sterilize the reverse osmosis membrane filter element.

2. The water purification equipment according to claim 1, characterized in that, The main water inlet of the water purification equipment is connected to the water inlet of the reverse osmosis membrane filter element, wherein, The cleaning component has a cleaning inlet, and the cleaning module and / or the sterilization module can communicate with the cleaning inlet. The cleaning inlet is connected to the main water inlet, so that water in the main water inlet enters the cleaning module and / or the sterilization module, thereby dissolving the cleaning agent and / or the sterilizing agent to form a cleaning solution and / or a sterilizing solution. And / or, the cleaning component has a cleaning outlet connected to the main water inlet, and the cleaning module and / or the sterilization module can be connected to the cleaning outlet, which is connected to the main water inlet, so that the cleaning liquid and / or sterilization liquid in the cleaning module and / or the sterilization module can enter the reverse osmosis membrane filter element.

3. The water purification equipment according to claim 2, characterized in that, The water purification equipment also includes a booster pump installed on the main water inlet line, the booster pump being located upstream of the clean outlet; And / or, the water purification equipment further includes a pre-filter unit, the outlet of which is connected to the main water inlet, and the cleaning inlet is located downstream of the pre-filter unit.

4. The water purification equipment according to claim 2, characterized in that, The cleaning module includes a cleaning pipeline, a cleaning valve disposed on the cleaning pipeline, and a cleaning agent storage component. The cleaning agent storage component is located downstream of the cleaning valve and is used to store cleaning agent. The sterilization module includes a sterilization pipeline, a sterilization valve disposed on the sterilization pipeline, and a sterilizer storage component. The sterilizer storage component is located downstream of the sterilization valve and is used to store sterilizer. The first end of the cleaning pipeline and the first end of the sterilization pipeline meet and are connected to the cleaning inlet, and the second end of the cleaning pipeline and the second end of the sterilization pipeline meet and are connected to the cleaning outlet.

5. The water purification equipment according to claim 4, characterized in that, The number of cleaning pipelines is at least two and multiple cleaning pipelines are arranged in parallel, and the cleaning valve and the cleaning agent storage component are each arranged in a one-to-one correspondence with the cleaning pipeline; And / or, the number of sterilization pipelines is at least two, and multiple sterilization pipelines are arranged in parallel, and the sterilization valve and the sterilizing agent storage component are arranged one-to-one with the sterilization pipeline; And / or, the cleaning assembly further includes a one-way valve disposed on the cleaning line and / or the sterilization line and located between the cleaning outlet and the cleaning agent storage component and / or the sterilization agent storage component, the one-way valve being configured to prevent water in the main inlet line from flowing back through the cleaning outlet into the cleaning agent storage component and / or the sterilization agent storage component.

6. The water purification equipment according to claim 1, characterized in that, The water purification equipment also includes a pure water outlet pipe, and the pure water end of the reverse osmosis membrane filter element is connected to the pure water outlet pipe, wherein: The water purification equipment also includes a return pipe and a return valve. The first end of the return pipe is connected to the pure water outlet pipe, and the second end of the return pipe is connected to the upstream end of the booster pump of the water purification equipment. The return valve is installed on the return pipe and is used to control the opening and closing of the return pipe. Alternatively, the water purification equipment may further include a drain pipe and a drain valve, wherein the first end of the drain pipe is connected to the pure water outlet pipe, the second end of the drain pipe is connected to the wastewater outlet pipe of the water purification equipment, and the drain valve is installed on the drain pipe and is used to control the opening and closing of the drain pipe.

7. A control method for a water purification device, wherein the water purification device is any one of claims 1 to 5, characterized in that, The control method includes the following steps: S1: The cleaning module delivers cleaning fluid to the reverse osmosis membrane filter element; S2: Soak the reverse osmosis membrane filter element in the cleaning solution for a first preset time, and then discharge the cleaning solution from the reverse osmosis membrane filter element; S3: The sterilization module delivers sterilization solution to the reverse osmosis membrane filter element; S4: Soak the reverse osmosis membrane filter element in the bactericidal solution for a second preset time, and then discharge the bactericidal solution from the reverse osmosis membrane filter element.

8. The control method for a water purification device according to claim 7, characterized in that, Before immersing the reverse osmosis membrane filter element in the cleaning solution, the control method further includes the following steps: Obtain the operating parameters of the water purification equipment; The first preset time is determined based on the operating parameters; The operating parameters include at least one of the following: the influent water quality of the reverse osmosis membrane filter element, the total water production of the reverse osmosis membrane filter element, the cumulative operating time of the water purification equipment, the duration during which the pure water-to-waste ratio of the reverse osmosis membrane filter element is higher than the set pure water-to-waste ratio, the continuous water production time of the reverse osmosis membrane filter element after the pre-filter element reaches the end of its service life, the pure water flow rate of the reverse osmosis membrane filter element, and the pressure difference between the membrane and the membrane of the reverse osmosis membrane filter element. And / or, during the process of discharging the cleaning solution from the reverse osmosis membrane filter element, the control method further includes the following steps: Obtain the water quality information of the cleaning solution; The second preset time is determined based on the water quality information.

9. The control method for a water purification device according to claim 7, characterized in that, After the cleaning solution and / or the disinfectant solution are discharged from the reverse osmosis membrane filter element, the control method further includes the following steps: The water purification equipment supplies water to the reverse osmosis membrane filter element to flush the reverse osmosis membrane filter element; The flushing water is then discharged from the reverse osmosis membrane filter element.

10. The control method for a water purification device according to claim 7, characterized in that, The water purification equipment includes a pure water component, and the pure water end of the reverse osmosis membrane filter element can be connected to the pure water component. After the sterilization module finishes sterilizing the reverse osmosis membrane filter element and the reverse osmosis membrane filter element resumes water production mode, the control method further includes the following steps: Obtain the current water quality parameters of the pure water end of the reverse osmosis membrane filter element; Based on the current water quality parameters, the pure water end of the reverse osmosis membrane filter element is selectively connected to the pure water use component.

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