Control method for water purification apparatus and water purification apparatus

Abstract

This invention relates to the field of water purification technology, specifically providing a control method and a water purification device for water purification equipment. The aim is to solve the problem of detergent residue or water waste when rinsing reverse osmosis membrane filter cartridges after cleaning with a cleaning component in existing water purification equipment. The water purification device of this application includes a reverse osmosis membrane filter cartridge, a cleaning component, a wastewater outlet pipe, and a main inlet pipe. The water purification device can rinse the reverse osmosis membrane filter cartridge, and the rinse water generated flows out through the wastewater outlet pipe. During the rinsing of the reverse osmosis membrane filter cartridge, the control method includes: acquiring the current water quality parameters in the wastewater outlet pipe; acquiring the target water quality parameters; and selectively stopping the rinsing of the reverse osmosis membrane filter cartridge based on the current and target water quality parameters. This invention can determine whether the detergent residue in the reverse osmosis membrane filter cartridge has been completely rinsed off based on the quality of the rinse water, avoiding detergent residue and water waste, and improving the user experience.

Description

Technical Field

[0001] This invention relates to the field of water purification technology, specifically providing a control method and a water purification device for use in water purification equipment. 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] When cleaning reverse osmosis membrane filter cartridges using cleaning components, cleaning solution is usually delivered into the reverse osmosis membrane filter cartridge to soak or rinse it, thereby removing dirt from the filter cartridge. After the cleaning solution is discharged from the filter cartridge, the filter cartridge is rinsed with clean water to remove any remaining cleaning agent.

[0005] In the existing technology, if the rinsing time is too short when rinsing the reverse osmosis membrane filter element, the residual cleaning solution inside the reverse osmosis membrane filter element cannot be completely rinsed out. If the rinsing time is too long, it will lead to water waste and result in a poor user experience. Summary of the Invention

[0006] The present invention aims to solve the above-mentioned technical problems to at least a certain extent, that is, to at least a certain extent solve the problems that existing water purification equipment has when rinsing the reverse osmosis membrane filter element after cleaning with the cleaning component, the residual cleaning agent cannot be effectively rinsed off due to the rinsing time being too short, or the water is wasted due to the rinsing time being too long.

[0007] 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, a wastewater outlet pipe, and a main inlet pipe. The cleaning component is used to deliver cleaning liquid to the reverse osmosis membrane filter element for cleaning the reverse osmosis membrane filter element. The wastewater outlet pipe is connected to the wastewater end of the reverse osmosis membrane filter element, and the main inlet pipe is connected to the inlet end of the reverse osmosis membrane filter element. After the cleaning liquid is discharged from the reverse osmosis membrane filter element, water in the main inlet pipe enters the reverse osmosis membrane filter element to rinse it. The rinsing water generated by rinsing flows out through the wastewater outlet pipe. When the water purification device rinses the reverse osmosis membrane filter element, the control method includes the following steps: acquiring current water quality parameters in the wastewater outlet pipe; acquiring target water quality parameters; and selectively stopping the rinsing of the reverse osmosis membrane filter element by the water purification device based on the current water quality parameters and the target water quality parameters.

[0008] In the preferred embodiment of the control method for the water purification equipment described above, the step of "selectively stopping the water purification equipment from flushing the reverse osmosis membrane filter element according to the current water quality parameters and the target water quality parameters" specifically includes: calculating the difference Δ = |D1 - D0|; comparing the difference Δ with a first preset value A1; and selectively stopping the water purification equipment from flushing the reverse osmosis membrane filter element according to the comparison result; wherein, D1 is the current water quality parameter, D0 is the target water quality parameter, and A1 ≥ 0.

[0009] In the preferred embodiment of the control method for the water purification equipment described above, the step of "selectively stopping the water purification equipment from rinsing the reverse osmosis membrane filter element according to the comparison result" specifically includes: if Δ > A1, then the water purification equipment is not stopped from rinsing the reverse osmosis membrane filter element; and / or, if Δ1 ≤ A1, then the water purification equipment is stopped from rinsing the reverse osmosis membrane filter element.

[0010] In the preferred embodiment of the control method for the water purification equipment described above, the water purification equipment further includes a wastewater valve installed on the wastewater outlet pipe. The wastewater valve has a flushing position and a wastewater position. When the water purification equipment flushes the reverse osmosis membrane filter element, the wastewater valve is located in the flushing position. After the water purification equipment stops flushing the reverse osmosis membrane filter element, the control method further includes the following step: adjusting the wastewater valve to the wastewater position.

[0011] In the preferred embodiment of the control method for the above-mentioned water purification equipment, the wastewater valve is an adjustable wastewater proportional valve, and the wastewater valve includes at least two wastewater levels. The step of "adjusting the wastewater valve to the wastewater level" specifically includes: adjusting the wastewater valve to a preset level and executing the water purification equipment in water production mode; obtaining the current pure water flow rate at the pure water end of the reverse osmosis membrane filter element; obtaining a preset pure water flow rate corresponding to the preset level; determining the target wastewater level based on the current pure water flow rate and the preset pure water flow rate; and adjusting the wastewater valve to the target wastewater level.

[0012] In the preferred technical solution of the control method for the above-mentioned water purification equipment, the step of "determining the target wastewater level according to the current pure water flow rate and the preset pure water flow rate" specifically includes: determining the regeneration degree information of the reverse osmosis membrane filter element according to the current pure water flow rate and the preset pure water flow rate; and determining the target wastewater level according to the regeneration degree information.

[0013] In the preferred embodiment of the control method for the above-mentioned water purification equipment, the water purification equipment further includes a pure water supply component, which is used to output pure water from the pure water end of the reverse osmosis membrane filter element for user drinking. After the reverse osmosis membrane filter element is flushed and the water production mode is restored, the control method further includes the following steps: obtaining the pure 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 supply component according to the pure water quality parameters.

[0014] In the preferred embodiment of the control method for the above-mentioned water purification equipment, the step of "selectively connecting the pure water end of the reverse osmosis membrane filter element with the pure water use component according to the pure water quality parameters" specifically includes: comparing the pure water quality parameters with preset water quality parameters; determining whether the pure water quality parameters are greater than the preset water quality parameters; and selectively connecting the pure water end of the reverse osmosis membrane filter element with the pure water use component according to the determination result.

[0015] In the preferred embodiment of the control method for the above-mentioned water purification equipment, the water quality parameters include at least one of TDS value and pH value.

[0016] In a second aspect, the present invention also provides a water purification device, the water purification device including a controller configured to perform any of the control methods described above.

[0017] When the above-mentioned preferred technical solution is adopted, during the rinsing of the reverse osmosis membrane filter element, by acquiring the current water quality parameters and target water quality parameters in the wastewater outlet pipe, it is possible to accurately determine whether the residual cleaning agent in the reverse osmosis membrane filter element has been rinsed off based on the detected water quality of the rinsing water after rinsing the reverse osmosis membrane filter element. On the one hand, it can avoid the problem of not being able to completely rinse off the residual cleaning agent in the reverse osmosis membrane filter element due to too short a rinsing time. On the other hand, it can also avoid the problem of water wastage due to too long a rinsing time, which greatly improves the user experience.

[0018] Furthermore, compared to directly comparing the current water quality parameters with the target water quality parameters and selectively stopping the rinsing of the reverse osmosis membrane filter element based on the comparison result, this method first calculates the difference between the current water quality parameters and the target water quality parameters, then compares this difference with a first preset value, and selectively stops the rinsing of the reverse osmosis membrane filter element based on the comparison result. On the one hand, this avoids misjudgments caused by detection errors of the water quality detection components; on the other hand, when the current water quality parameters in the wastewater outlet pipe are close to the preset water quality parameters, the rinsing of the reverse osmosis membrane filter element can be stopped in a timely manner, avoiding the problem of wasting water resources by continuing to rinse even when the current water quality parameters are close to the preset water quality parameters.

[0019] Furthermore, after the water purification equipment stops flushing the reverse osmosis membrane filter element, adjusting the wastewater valve from the flushing setting to the wastewater setting allows for timely switching of the wastewater valve from flushing mode to water purification mode, which helps improve the intelligent control of the water purification equipment and further enhances the user experience.

[0020] Furthermore, by first adjusting the wastewater valve to the preset position and activating the water purification equipment in water production mode, and then obtaining the pure water flow rate at the pure water end of the reverse osmosis membrane filter, the degree of regeneration of the reverse osmosis membrane filter can be determined based on the obtained pure water flow rate. Subsequently, the appropriate wastewater setting can be selected based on the degree of regeneration of the reverse osmosis membrane filter, further enhancing the user experience.

[0021] Furthermore, after cleaning the reverse osmosis membrane filter element, a small amount of cleaning agent will permeate to the pure water end of the reverse osmosis membrane filter element. By obtaining the pure water quality information of the pure water end of the reverse osmosis membrane filter element, it is possible to determine whether there is cleaning agent residue in the pure water end. If there is cleaning agent residue in the pure water end, the pure water end of the reverse osmosis membrane filter element will not be connected to the pure water use component. If there is no cleaning agent residue in the pure water end, the pure water end of the reverse osmosis membrane filter element will be connected to the pure water use component, which can discharge the water containing cleaning agent residue, thus helping to achieve zero pollution and zero chemical addition. Attached Figure Description

[0022] The preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:

[0023] Figure 1 This is a schematic diagram of the structure of a first embodiment of the water purification device of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of a second embodiment of the water purification device of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a third embodiment of the water purification device of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of Embodiment 4 of the water purification device of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of Embodiment 5 of the water purification device of the present invention;

[0028] Figure 6 This is a schematic diagram of the structure of Embodiment Six of the water purification device of the present invention;

[0029] Figure 7 This is a structural schematic diagram of Embodiment Seven of the water purification device of the present invention;

[0030] Figure 8 This is a schematic diagram of the structure of Embodiment 8 of the water purification device of the present invention;

[0031] Figure 9 This is a flowchart of the control method for a water purification device according to the present invention;

[0032] Figure 10 This is a flowchart of an embodiment of the control method for a water purification device according to the present invention.

[0033] List of reference numerals in the attached diagram:

[0034] 1. Main water inlet pipe; 11. Inlet valve; 12. Booster pump; 13. Second water quality testing component; 2. Reverse osmosis membrane filter element; 21. Wastewater outlet pipe; 211. Wastewater valve; 212. First water quality testing component; 22. Drain pipe; 221. Drain valve; 23. Return pipe; 231. Return 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; 331. First cleaning agent storage component; 332. Second cleaning agent storage component; 34. Check valve; 341. First check valve; 342. Second check valve; 343. Third check valve; 35. Manifold; 36. Diverter pipe; 361. Control valve; 4. Pre-filter unit; 5. Pure water outlet pipe; 51. Pure water supply component; 52. Flow rate detection component; 61. Circulation pipe; 62. Circulation pump; 7. Reversing valve. Detailed Implementation

[0035] 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.

[0036] It should be noted that in the description of this invention, terms such as "upper," "lower," "inner," and "outer," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0037] 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.

[0038] Based on the problems mentioned in the background art, existing water purification equipment has the following issues when rinsing the reverse osmosis membrane filter after cleaning with cleaning components: the rinsing time is too short to effectively rinse away residual cleaning agents, or the rinsing time is too long, resulting in wasted water. The present invention provides a water purification device.

[0039] like Figures 1 to 8 As shown, the water purification device of the present invention includes a reverse osmosis membrane filter element 2, a cleaning component, a wastewater outlet pipe 21, and a main inlet pipe 1. The cleaning component is used to deliver cleaning liquid to the reverse osmosis membrane filter element 2 to clean the reverse osmosis membrane filter element 2. The wastewater outlet pipe 21 is connected to the wastewater end of the reverse osmosis membrane filter element 2 to discharge the liquid inside the reverse osmosis membrane filter element 2. The main inlet pipe 1 is connected to the inlet end of the reverse osmosis membrane filter element 2. After the cleaning liquid is discharged from the reverse osmosis membrane filter element 2, the water in the main inlet pipe 1 can enter the reverse osmosis membrane filter element 2 to rinse the reverse osmosis membrane filter element 2. The rinsing water generated by rinsing flows out through the wastewater outlet pipe 21.

[0040] like Figure 9 As shown, when the reverse osmosis membrane filter element 2 is rinsed by the water purification equipment, the control method of the present invention includes the following steps:

[0041] S1: Obtain the current water quality information within the wastewater outlet pipe 21;

[0042] S2: Obtain target water quality information;

[0043] S3: Based on the current water quality information and the target water quality information, selectively stop the water purification equipment from flushing the reverse osmosis membrane filter element 2.

[0044] With this setup, the water quality parameters of the flushing water in the wastewater outlet pipe 21 can be detected in real time when the reverse osmosis membrane filter element 2 is flushed. This allows for accurate determination of whether the residual cleaning agent in the reverse osmosis membrane filter element 2 has been thoroughly rinsed based on the detected water quality of the flushing water. On the one hand, this avoids the problem of insufficient flushing time leading to incomplete rinsing of the residual cleaning agent in the reverse osmosis membrane filter element 2, and on the other hand, it avoids the problem of excessive flushing time leading to water waste, thus greatly improving the user experience.

[0045] It should be noted that, in practical applications, those skilled in the art can install water quality detection components on the wastewater outlet pipe 21 to obtain the current water quality parameters within the wastewater outlet pipe 21, or they can obtain the current water quality parameters within the wastewater outlet pipe 21 by collecting water from the wastewater outlet pipe 21 and detecting its water quality information, or they can obtain the current water quality parameters within the wastewater outlet pipe 21 by any other possible means, etc. Such adjustments and changes to the specific method of obtaining the current water quality parameters within the wastewater outlet pipe 21 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.

[0046] Preferably, such as Figures 1 to 8 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 the water quality parameters of the flushing water in the wastewater outlet pipe 21.

[0047] It should be noted that the present invention does not limit the specific method of obtaining the target water quality parameters. For example, the target water quality parameters can be obtained by the user inputting the local water quality parameters on the control panel of the water purification equipment, or by setting a water quality detection component on the main water inlet 1 and detecting the water quality parameters in the main water inlet 1, etc. Such adjustments and changes to the specific method of obtaining the target water quality information do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0048] Preferably, such as Figures 1 to 8 As shown, the water purification device of the present invention further includes a second water quality detection component 13, which is disposed on the main water inlet 1 and is used to detect water quality parameters in the main water inlet 1. The second water quality detection component 13 is adapted to the first water quality detection component 212.

[0049] Preferably, the step of "obtaining the target water quality parameters" specifically includes:

[0050] The water quality parameters within the main inlet channel 1 are obtained as the target water quality parameters.

[0051] By installing a second water quality detection component 13 on the main inlet water line 1, and the second water quality detection component 13 being compatible with the first water quality detection component 212, the water quality parameters of the flushing water in the main inlet water line 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 inlet water line 1, it indicates that the residual cleaning agent in the reverse osmosis membrane filter element 2 has been completely washed off. In this way, misjudgment caused by poor inlet water quality can be avoided, thereby enabling a more accurate judgment on whether the cleaning agent in the reverse osmosis membrane filter element 2 has been rinsed off, further improving the user experience.

[0052] It should be noted that, in practical applications, those skilled in the art can directly compare the current water quality parameters with the target water quality parameters, and selectively stop the water purification equipment from rinsing the reverse osmosis membrane filter element 2 based on the comparison result. Alternatively, they can first calculate the difference between the current water quality parameters and the target water quality parameters, and then compare the difference with a preset value. Based on the comparison result, they can selectively stop the water purification equipment from rinsing the reverse osmosis membrane filter element 2. Or, they can first calculate the ratio between the current water quality parameters and the target water quality parameters, and then compare the ratio with a preset value. Based on the comparison result, they can selectively stop the water purification equipment from rinsing the reverse osmosis membrane filter element 2, 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.

[0053] Preferably, such as Figure 10 As shown, the step of "selectively stopping the rinsing of the reverse osmosis membrane filter element 2 by the water purification equipment according to the current water quality information and the target water quality information" specifically includes:

[0054] S31: Calculate the difference Δ = |D1 - D0|;

[0055] S32: Compare the difference △ with the first preset value A1;

[0056] S33: Based on the comparison results, selectively stop the water purification equipment from flushing the reverse osmosis membrane filter element;

[0057] Where D1 is the current water quality parameter, D0 is the target water quality parameter, and A1≥0.

[0058] By using this setting, compared to directly comparing the current water quality parameters with the target water quality parameters and selectively stopping the rinsing of the reverse osmosis membrane filter element based on the comparison result, this method first calculates the difference between the current water quality parameters and the target water quality parameters, then compares this difference with a first preset value, and selectively stops the rinsing of the reverse osmosis membrane filter element 2 based on the comparison result. On the one hand, it can avoid misjudgments caused by detection errors of the 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, it can promptly stop the rinsing of the reverse osmosis membrane filter element 2, avoiding the problem of wasting water resources by continuing to rinse when the current water quality parameters are close to the preset water quality parameters.

[0059] Preferably, such as Figure 10 As shown, the step of "selectively stopping the flushing of reverse osmosis membrane filter element 2 by the water purification equipment according to the comparison results" specifically includes:

[0060] S331: If △>A1, then the water purification equipment will not stop flushing the reverse osmosis membrane filter element 2.

[0061] With this setting, when △1 > A1, it indicates that the current water quality parameters in the wastewater outlet pipe 21 are still significantly different from the target water quality parameters in the main inlet pipe 1. This means that the flushing water still contains a lot of detergent, that is, the detergent in the reverse osmosis membrane filter element 2 has not been completely flushed out. At this time, the water purification equipment is not stopped from flushing the reverse osmosis membrane filter element 2, so that the residual detergent in the reverse osmosis membrane filter element 2 can continue to be flushed down, thus avoiding the residue of detergent in the reverse osmosis membrane filter element 2 from affecting the user's drinking water safety.

[0062] Preferably, such as Figure 10 As shown, the step of "selectively stopping the flushing of reverse osmosis membrane filter element 2 by the water purification equipment according to the comparison results" specifically includes:

[0063] S332: If △1≤A1, then the water purification equipment will stop flushing the reverse osmosis membrane filter element 2.

[0064] With this setting, when △1≤A1, it means that the current water quality parameters in the wastewater outlet pipe 21 are close to the target water quality parameters in the main inlet pipe 1. This indicates that the flushing water contains no detergent or only a very small amount of detergent, meaning that the detergent residue in the reverse osmosis membrane filter element 2 has been flushed clean. At this time, the water purification equipment can stop flushing the reverse osmosis membrane filter element 2 in time, which can avoid the problem of water waste and improve the user experience.

[0065] 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.

[0066] It should also be noted that, in practical applications, those skilled in the art can set the water quality parameter to pH value, or TDS value, or even pH value and TDS value, etc. Such adjustments and changes to the specific setting type of water quality parameter 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.

[0067] Preferably, the water quality parameters include at least one of pH value or TDS value.

[0068] It should be noted that the present invention does not limit the cleaning method of the cleaning component for the reverse osmosis membrane filter element 2. For example, the cleaning component can be directly configured to deliver cleaning liquid into the reverse osmosis membrane filter element 2, and the reverse osmosis membrane filter element 2 can be cleaned by soaking it in the cleaning liquid. Alternatively, a circulation pipe 61 can be set up so that the cleaning component, the inlet end of the reverse osmosis membrane filter element 2, and the wastewater end of the reverse osmosis membrane filter element 2 are sequentially connected to form a cleaning circuit, and the cleaning liquid is driven to circulate in the cleaning circuit to clean the reverse osmosis membrane filter element 2, etc. Such adjustments and changes to the specific cleaning method for cleaning the reverse osmosis membrane filter element 2 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.

[0069] Preferably, such as Figures 1 to 8 As shown, the water purification device of the present invention also includes a circulation pipe 61. 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 circuit. The water purification device is configured to enable the cleaning liquid to circulate in the cleaning circuit.

[0070] By setting up a circulation pipe, the cleaning component, the inlet end of the reverse osmosis membrane filter element 2, and the wastewater end of the reverse osmosis membrane filter element 2 can be connected in sequence to form a cleaning circuit. This allows the reverse osmosis membrane filter element 2 to be flushed multiple times, thereby more thoroughly cleaning the dirt on the reverse osmosis membrane filter element 2, improving the cleaning efficiency of the reverse osmosis membrane filter element 2, and further enhancing the user experience.

[0071] It should be noted that, in practical applications, the present invention does not limit the specific driving method for the water purification equipment to drive the cleaning fluid to circulate in the cleaning circuit. For example, a circulation pump 62 can be set on the cleaning circuit to drive the cleaning fluid to circulate in the cleaning circuit. Alternatively, the cleaning outlet 302 of the cleaning component can be set to be connected to the inlet end of the reverse osmosis membrane filter element 22 through the main water inlet 1 of the water purification equipment, and the cleaning fluid in the cleaning circuit can be driven to circulate through the booster pump 12 on the main water inlet 1, etc. Such flexible adjustments and changes do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0072] Preferably, such as Figures 1 to 8 As shown, the cleaning component of the present invention has a cleaning outlet 302. The water purification equipment also includes a booster pump 12 and a circulation pump 62. The cleaning outlet 302 is connected to the main water inlet 1. The booster pump 12 is installed on the main water inlet 1 and located upstream of the cleaning outlet 302. The circulation pump 62 is installed on the cleaning circuit and is used to drive the liquid circulation flow in the cleaning circuit.

[0073] With this setup, compared to the method of driving the liquid circulation flow in the cleaning circuit by the booster pump 12, the method of driving the liquid circulation flow in the cleaning circuit by setting the circulation pump 62 can 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. Furthermore, since the cost of the circulation pump 62 is much lower than that of the booster pump 12, it can greatly save the cost of the water purification equipment and further improve the user experience.

[0074] It should be noted that, in practical applications, the present invention does not limit the specific configuration type of the cleaning component. For example, the cleaning component can be configured to have only a cleaning outlet 302, that is, a large amount of cleaning liquid can be 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 configured to include a cleaning pipeline 31 and a cleaning agent storage component 33 disposed on the cleaning pipeline 31. The two ends of the cleaning pipeline 31 form a cleaning inlet 301 and a cleaning outlet 302, respectively. Water is injected into the cleaning inlet 301 to form cleaning liquid in the cleaning agent storage component 33, etc. Such adjustments and changes to the specific configuration type of the cleaning component 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, such as Figures 1 to 8As shown, the cleaning assembly also has a cleaning pipe 31 and a 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 agent storage component 33 to form a cleaning liquid. The cleaning pipe 31 is used to transport the cleaning liquid to the reverse osmosis membrane filter element 2.

[0076] With this configuration, compared to setting the cleaning component to have only a cleaning outlet 302, setting the cleaning component to have both a cleaning inlet 301 and a cleaning outlet 302 allows the cleaning component to inject water into the cleaning inlet 301 to form cleaning fluid during cleaning. This avoids storing a large amount of cleaning fluid in the cleaning agent storage component 33, which would result in an excessively large cleaning component and further improves the user experience.

[0077] It should be noted that, in practical applications, this application does not impose any limitations on the specific structural form of the cleaning component, as long as it has a cleaning pipe 31 and a cleaning agent storage component 33, and the two 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 it 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 principles and scope of this invention and should all be included within the protection scope of this invention.

[0078] The following two examples illustrate this concept.

[0079] Example 1:

[0080] like Figure 1 , Figure 3 , Figure 5 , Figure 7 and Figure 8 As shown, the cleaning component is configured to have only one cleaning agent storage component 33, which is described in detail in the following two cases.

[0081] Scenario 1:

[0082] like Figure 1 , Figure 7 and Figure 8 As shown, the cleaning assembly includes a cleaning pipeline 31 and a cleaning valve 32 and a cleaning agent storage component 33 sequentially disposed on the cleaning pipeline 31. The cleaning agent storage component 33 is located downstream of the cleaning valve 32 and is used to store acidic or alkaline cleaning agents.

[0083] When the cleaning component cleans the reverse osmosis membrane filter element 2, the cleaning valve 32 is opened, and the water in the main inlet 1 enters the cleaning agent storage component 33 through the cleaning inlet 301 and dissolves the cleaning agent stored in the cleaning agent storage component 33 to form a cleaning solution. The cleaning solution is then discharged through the cleaning outlet 302 and transported to the reverse osmosis membrane filter element 2. The reverse osmosis membrane filter element 2 is then soaked in the cleaning solution to remove the dirt on the reverse osmosis membrane filter element 2.

[0084] Scenario 2:

[0085] like Figure 3 and Figure 5 As shown, the cleaning assembly includes a cleaning pipeline 31 and a cleaning valve 32 and a cleaning agent storage component 33 sequentially arranged on the cleaning pipeline 31. The cleaning agent storage component 33 is located downstream of the cleaning valve 32 and is used to store acidic 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. The circulation pump 62 is arranged on the cleaning pipeline 31.

[0086] When the cleaning unit cleans the reverse osmosis membrane filter element 2, the cleaning valve 32 is opened, and the water in the main inlet 1 enters the cleaning agent storage component 33 through the cleaning inlet 301, dissolving the cleaning agent stored in the cleaning agent storage component 33 to form a cleaning solution. The cleaning solution is then discharged through the cleaning outlet 302 and transported to the reverse osmosis membrane filter element 2. The reverse osmosis membrane filter element 2 is then soaked in the cleaning solution. After that, the cleaning valve 32 is closed, and the circulation pump 62 is started. The cleaning solution in the reverse osmosis membrane filter element 2 circulates in the cleaning circuit, rinsing the reverse osmosis membrane filter element 2 multiple times to remove the dirt on the reverse osmosis membrane filter element 2.

[0087] It should be noted that, in practical applications, those skilled in the art can store cleaning agents in the cleaning agent storage component 33 according to actual application needs. For example, acidic cleaning agents can be stored in the cleaning agent storage component 33, or alkaline cleaning agents can be stored in the cleaning agent storage component 33, etc. Such adjustments and changes to the type of cleaning agent in the cleaning agent storage component 33 do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0088] It should also be noted that, in practical applications, those skilled in the art can configure the second end of the circulation pipe 61 to be connected to the upstream end of the cleaning valve 32, or the second end of the circulation pipe 61 to be connected to the downstream end of the cleaning valve 32, 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.

[0089] Preferably, the second end of the circulation pipe 61 is configured to communicate with the downstream end of the cleaning valve 32.

[0090] With this setup, when the circulation pump 62 is started, the cleaning valve 32 can be closed to prevent the cleaning fluid in the cleaning circuit from flowing back into the main water inlet 1 and thus contaminating the main water inlet 1.

[0091] Example 2:

[0092] like Figure 2 , Figure 4 and Figure 6 As shown, the cleaning assembly includes multiple cleaning agent storage components 33 arranged in parallel, which will be described in detail in the following two cases.

[0093] Scenario 1:

[0094] like Figure 2 As shown, the cleaning assembly includes at least two parallel cleaning pipes 31, a cleaning valve 32 disposed on each cleaning pipe 31, and a cleaning agent storage component 33. The first ends of the plurality of cleaning pipes 31 converge and are connected to a cleaning inlet 301, and the second ends of the plurality of cleaning pipes 31 converge and are connected to a cleaning outlet 302. The cleaning agent storage component 33 is located downstream of the cleaning valve 32, and the cleaning agent storage component 33 on each cleaning pipe 31 is used to store different types of cleaning agents.

[0095] Scenario 2:

[0096] like Figure 4 and Figure 6 As shown, the cleaning assembly includes a manifold 35, at least two parallel cleaning lines 31, a cleaning valve 32 and a cleaning agent storage component 33 on each cleaning line 31. The first ends of the multiple cleaning lines 31 converge and are connected to the cleaning inlet 301, and the second ends of the multiple cleaning lines 31 converge and are connected to the manifold 35. The end of the manifold 35 forms a cleaning outlet 302. The cleaning agent storage component 33 is located downstream of the cleaning valve 32. The cleaning agent storage component 33 on each cleaning line 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 line 31. The circulation pump 62 is installed on the manifold 35.

[0097] It should be noted that, in practical applications, the present invention does not limit the specific number of parallel cleaning pipelines 31. For example, two parallel cleaning pipelines 31 can be provided, each equipped with a cleaning valve 32 and a cleaning agent storage component 33. Alternatively, three parallel cleaning pipelines 31 can be provided, each equipped with a cleaning valve 32 and a cleaning agent storage component 33. Furthermore, multiple parallel cleaning pipelines 31 can be provided, each equipped with a cleaning valve 32 and a cleaning agent storage component 33. Such adjustments and changes to the specific number of parallel cleaning pipelines 31 do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0098] The following description uses two parallel cleaning pipelines 31 as an example.

[0099] Specifically, such as Figure 4 and Figure 6 As shown, the cleaning assembly includes a manifold 35, a first cleaning pipe 311 and a second cleaning pipe 312 connected 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 meet and are connected to the cleaning inlet 301. The second end of the first cleaning pipe 311 and the second end of the second cleaning pipe 312 meet and are connected to the manifold 35. The end of the manifold 35 forms a cleaning outlet 302. The first cleaning agent storage component 331 is located downstream of the first cleaning valve 321 and is used to store acidic cleaning agent. The second cleaning agent storage component 332 is located downstream of the second cleaning valve 322 and is used to store alkaline cleaning agent. A circulation pump 62 is provided on the manifold 35.

[0100] It should be noted that, in practical applications, those skilled in the art can configure the second end of the circulation tube 61 to communicate with the upstream end of the first cleaning agent storage component 331 and the second cleaning agent storage component 332, or the second end of the circulation tube 61 can be configured to communicate with the downstream end of the first cleaning agent storage component 331 and the second cleaning agent storage component 332, etc. Such adjustments and changes to the specific connection positions of the second end of the circulation tube 61 with the first cleaning tube 311 and the second cleaning tube 312 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, such as Figure 4 and Figure 6As shown, the cleaning assembly also includes a diversion pipe 36 and a control valve 361. The first end of the diversion 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 meet and communicate with the second end of the diversion pipe 36. The second end of the circulation pipe 61 communicates with the second end of the diversion pipe 36. The control valve 361 is disposed on the diversion pipe 36 and is used to control the opening and closing of the diversion pipe 36.

[0102] With this configuration, the second end of the circulation pipe 61 can be connected to the upstream end of the first cleaning agent storage component 331 and the second cleaning agent storage component 332, thereby allowing the cleaning agent in the first cleaning agent storage component 331 and the second cleaning agent storage component 332 to be completely delivered to the reverse osmosis membrane filter element 2, improving the cleaning effect of the reverse osmosis membrane filter element 2. At the same time, the control valve 361 installed on the diversion pipe 36 can also prevent the cleaning liquid in the cleaning circuit from flowing back into the main water inlet 1 and contaminating the main water inlet 1.

[0103] 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.

[0104] 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.

[0105] like Figure 4 and Figure 6As shown, the first cleaning valve 321 is opened while the second cleaning valve 322 remains closed, allowing water from the main inlet 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 331. This solution is then discharged through the cleaning outlet 302 and transported to the reverse osmosis membrane filter element 2. At this point, the first cleaning pipe 311, the inlet end of the reverse osmosis membrane filter element 2, and the wastewater end of the reverse osmosis membrane filter element 2 are sequentially connected to form a cleaning circuit. The circulation pump 62 is started to circulate the first cleaning solution within the cleaning circuit, soaking and rinsing the reverse osmosis membrane filter element 2 to remove inorganic dirt. After cleaning, the reverse osmosis membrane is removed from the filter element. The liquid inside filter element 2 is discharged and rinsed. Then, the first cleaning valve 321 is closed and the second cleaning valve 322 is opened, allowing water from the main inlet 1 to enter the second cleaning pipe 312 and form a second cleaning liquid (i.e., an alkaline solution) in the second cleaning agent storage component 332. At this time, the second cleaning pipe 312, the 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. The cleaning liquid 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 make the second cleaning agent circulate in the cleaning circuit, soaking and rinsing the reverse osmosis membrane filter element 2 to remove organic dirt from it.

[0106] 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.

[0107] Preferably, the alkaline 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.

[0108] 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 alkaline cleaning agent can also be other types of alkaline solutions, and those skilled in the art can make adjustments according to actual needs.

[0109] It should also be noted that the present invention does not limit the form of the cleaning agent in the first cleaning agent storage component 331 and the second cleaning agent storage component 332. For example, the cleaning agent in both the first cleaning agent storage component 331 and the second cleaning agent storage component 332 can be in solid form, or the cleaning agent in both the first cleaning agent storage component 331 and the second cleaning agent storage component 332 can be in liquid form, or one of the first cleaning agent storage component 331 and the second cleaning agent storage component 332 can be in solid form and the other in liquid form, etc. Such adjustments and changes to the specific form of the cleaning agent stored in the first cleaning agent storage component 331 and the second cleaning agent storage component 332 do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0110] Preferably, the cleaning agents stored in the first cleaning agent storage component 331 and the second cleaning agent storage component 332 are both in solid form.

[0111] More preferably, in order to accelerate the dissolution of the cleaning agent, the cleaning agent is in granular or powder form.

[0112] It should be noted that although the present invention uses the above two embodiments as examples to describe the specific form of the cleaning component, it is not restrictive. For example, the cleaning component may also include multiple cleaning pipes 31 and multiple cleaning agent storage components 33 disposed on the cleaning pipes, etc. Such adjustments and changes to the specific configuration of the cleaning component do not deviate from the principle and scope of the present invention and should be included within the protection scope of the present invention.

[0113] It should be noted that, in practical applications, those skilled in the art can install a check valve structure in the detergent storage component 33 to prevent water in the main water inlet 1 from entering the detergent storage component 33 through the cleaning outlet 302. Alternatively, a one-way valve 34 can be installed on the cleaning pipeline 31 to prevent water in the main water inlet 1 from entering the detergent storage component 33 through the cleaning outlet 302. Or, a control valve can be installed on the cleaning pipeline 31 to prevent water in the main water inlet 1 from entering the detergent 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 all be included within the protection scope of the present invention.

[0114] Preferably, such as Figures 1 to 8 As shown, a one-way valve 34 is provided on the cleaning pipeline 31. The one-way valve 34 is located at the downstream end of the cleaning agent storage component 33 and can prevent water in the main water inlet 1 from entering the cleaning agent storage component 33 through the cleaning outlet 302.

[0115] 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 into the detergent storage component 33, thereby avoiding the detergent from dissolving and entering the reverse osmosis membrane filter element 2 under 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 setting a control valve on the cleaning pipeline 31, setting a one-way valve 34 to prevent water in the main inlet pipe 1 from entering the detergent storage component 33 through the cleaning outlet 302 can further save the cost of the water purification equipment.

[0116] Specifically, such as Figure 2 , Figure 4 and Figure 6 As shown, a first check valve 341 is provided on the first cleaning pipe 311, and a second check valve 342 is provided on the second cleaning pipe 312.

[0117] It should be noted that, in practical applications, the present invention does not impose any limitations on the specific location of the circulation pump 62 in the cleaning circuit. For example, the circulation pump 62 can be installed on the cleaning pipeline, or it can be installed on the circulation pipe 61, or it can be installed in any other possible location in the cleaning circuit, etc. Such adjustments and changes to the specific location of the circulation pump 62 do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0118] Preferably, such as Figure 3 and Figure 5 As shown, the circulation pump 62 is installed on the cleaning pipeline 31.

[0119] Preferably, such as Figure 4 and Figure 6 As shown, the circulating pump 62 is installed on the manifold 35.

[0120] Preferably, the water purification device of the present invention further includes a third check valve 343, which is disposed between the clean outlet 302 and the circulation pump 62 and is capable of resisting the water pressure in the main water inlet 1.

[0121] Since the water pressure in the main inlet line 1 is high when the water purification equipment is in normal water production mode, the third check valve 343 can resist the water pressure in the main inlet line 1, avoid the problem of leakage of the circulation pump 62 due to excessive water pressure, and further improve the user experience.

[0122] It should be noted that, in practical applications, the present invention does not impose any limitations on the specific connection method between the first end of the circulation pipe 61 and the wastewater end of the reverse osmosis membrane filter element 2. For example, the first end of the circulation pipe 61 can be set to be directly connected to the wastewater outlet pipe 21, or the wastewater end of the reverse osmosis membrane filter element 2 can be set to be selectively connected to the wastewater outlet pipe 21 or the first end of the circulation pipe 61, 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.

[0123] The following describes the specific ways in which the first end of the circulation pipe 61 is connected to the wastewater end of the reverse osmosis membrane filter element 2 through the wastewater outlet pipe 21, using the following two scenarios as examples.

[0124] Scenario 1:

[0125] like Figures 3 to 4 As shown, the wastewater outlet pipe 21 is connected to the wastewater end of the reverse osmosis membrane filter element 2, and the first end of the circulation pipe 61 is connected to the wastewater outlet pipe 21.

[0126] Scenario 2:

[0127] like Figure 5 and Figure 6 As shown, the wastewater end of the reverse osmosis membrane filter element 2 can be selectively connected to the first end of the wastewater outlet pipe 21 or the circulation pipe 61.

[0128] With this setup, when the water purifier is in normal water production mode, the wastewater end of the reverse osmosis membrane filter element 2 is connected to the wastewater outlet pipe 21, and the filtered wastewater flows out through the wastewater outlet pipe 21. When the water purifier is in cleaning mode, the wastewater end of the reverse osmosis membrane filter element 2 is connected to the first end of the circulation pipe 61, so that the cleaning component, the 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, thereby enabling convenient switching between water production mode and cleaning mode, and further improving the user experience.

[0129] It should be noted that, in practical applications, this invention does not impose any limitations on the specific connection method by which the wastewater end of the reverse osmosis membrane filter element 2 can selectively connect to the first end of the wastewater outlet pipe 21 or the circulation pipe 61. For example, a reversing valve 7 can be set, wherein the first port of the reversing valve 7 is connected to the wastewater end of the reverse osmosis membrane filter element 2, the second port of the reversing valve 7 is connected to the wastewater outlet pipe 21, and the third port of the reversing valve 7 is connected to the first end of the circulation pipe 61. Alternatively, a three-way pipe can be set, with the first end of the three-way pipe connected to the wastewater end of the reverse osmosis membrane filter element 2, and the second and third ends of the three-way pipe respectively connected to the first end of the wastewater outlet pipe 21 or the circulation pipe 61. A first valve and a second valve are respectively set on the wastewater outlet pipe 21 and the circulation pipe 61, so that the wastewater end of the reverse osmosis membrane filter element 2 can selectively connect to the first end of the wastewater outlet pipe 21 or the circulation pipe 61, 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.

[0130] Preferably, such as Figure 5 and Figure 6 As shown, the water purification equipment also includes a reversing valve 7, wherein the first port of the reversing valve 7 is connected to the wastewater end of the reverse osmosis membrane filter element 2, the second port of the reversing valve 7 is connected to the wastewater outlet pipe 21, and the third port of the reversing valve 7 is connected to the first end of the circulation pipe 61. The first port of the reversing valve 7 can selectively connect to the second port or the third port.

[0131] This setup simplifies pipe connections and enhances the simplicity of the water purification equipment.

[0132] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific location of the cleaning inlet 301. For example, the cleaning inlet can be located at any possible location on the main water inlet 1, as long as water in the main water inlet 1 can enter the detergent storage component through the cleaning inlet 301. Alternatively, a pre-filter unit 4 can be provided, and the cleaning inlet can be located downstream of the pre-filter unit 4, so that water filtered by the pre-filter unit 4 enters the detergent storage component 33 through the cleaning inlet 301. Or, the cleaning inlet 301 can be located upstream of the pre-filter unit 4, and so on. Such adjustments and changes to the specific location of the cleaning inlet 301 do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0133] Preferably, such as Figures 1 to 8 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.

[0134] 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 through the cleaning inlet 301. The purified 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 solution, thus effectively improving the cleaning effect of the reverse osmosis membrane filter element 2.

[0135] 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.

[0136] Preferably, the pre-filter unit 4 is a pre-filter cartridge.

[0137] Preferably, such as Figures 1 to 8 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.

[0138] 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 the entry of cleaning solution into the reverse osmosis membrane filter element 2.

[0139] 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.

[0140] 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.

[0141] Preferably, such as Figures 1 to 8 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.

[0142] 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.

[0143] Preferably, such as Figures 1 to 8 As shown, the water purification equipment of the present invention also includes a wastewater valve 211 installed on the wastewater outlet pipe 21. The wastewater valve 211 has a flushing position and a wastewater position. When the water purification equipment flushes the reverse osmosis membrane filter element 2, the wastewater valve 211 is in the flushing position.

[0144] After the water purification equipment stops flushing the reverse osmosis membrane filter element 2, the control method of the present invention further includes the following steps:

[0145] Adjust wastewater valve 211 to the wastewater setting.

[0146] With this setting, after the water purification equipment stops rinsing the reverse osmosis membrane filter element 2, the wastewater valve 211 is adjusted from the rinsing position to the wastewater position. This allows the wastewater valve 211 to be switched from the rinsing mode to the water production mode in a timely manner, which helps to improve the intelligent control of the water purification equipment and further enhances the user experience.

[0147] It should be noted that the present invention does not limit the specific placement of the first water quality detection component 212 and the wastewater valve 211. For example, the first water quality detection component 212 can be placed at the upstream end of the wastewater valve 211, or it can be placed at the downstream end of the wastewater valve 211, etc. Such adjustments and changes to the specific placement of the first water quality detection component 212 and the wastewater valve 211 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.

[0148] For example, the first water quality detection component 212 is disposed at the upstream end of the wastewater valve 211.

[0149] It should be noted that the present invention does not limit the specific location of the first end of the circulation pipe 61 and the wastewater valve 211. For example, the first end of the circulation pipe 61 can be located upstream of the wastewater valve 211, or the first end of the circulation pipe 61 can be located downstream of the wastewater valve 211, etc. Such adjustments and changes to the specific location of the first end of the circulation pipe 61 and the wastewater valve 211 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.

[0150] Preferably, such as Figures 3 to 6 As shown, the first end of the circulation pipe 61 is located upstream of the wastewater valve 211.

[0151] With this configuration, when the cleaning component cleans the reverse osmosis membrane filter element 2, it can prevent the dirt removed from the cleaning component from entering the wastewater valve 211 and causing the wastewater valve 211 to become clogged, thereby extending the service life of the wastewater valve 211.

[0152] It should be noted that, in practical applications, those skilled in the art can set the wastewater valve 211 to a fixed wastewater ratio, or the wastewater valve 211 can be set to an adjustable wastewater ratio solenoid valve, etc. Such adjustments and changes to the specific setting type of the wastewater valve 211 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.

[0153] Preferably, the wastewater valve 211 is an adjustable wastewater proportional valve, and the wastewater valve 211 includes at least two wastewater positions. The step of "adjusting the wastewater valve 211 to the wastewater position" specifically includes:

[0154] Adjust the wastewater valve 211 to the preset position and activate the water purification equipment to run the water production mode;

[0155] Obtain the current pure water flow rate at the pure water end of reverse osmosis membrane filter element 2;

[0156] Obtain the preset pure water flow rate corresponding to the preset gear;

[0157] Determine the target wastewater level based on the preset pure water flow rate and the current pure water flow rate;

[0158] Adjust wastewater valve 211 to the target wastewater level.

[0159] With this setting, the wastewater valve 211 is first adjusted to the preset position and the water purification equipment is put into water production mode. Then, the pure water flow rate at the pure water end of the reverse osmosis membrane filter element 2 is obtained. The degree of regeneration of the reverse osmosis membrane filter element 2 can be judged based on the obtained pure water flow rate. Then, the wastewater setting that matches the degree of regeneration of the reverse osmosis membrane filter element 2 can be selected, further improving the user experience.

[0160] Preferably, the water purification equipment further includes a flow rate detection component 52, which is used to detect the outflow rate of the pure water end of the reverse osmosis membrane filter element 2.

[0161] It should be noted that, in practical applications, those skilled in the art can configure the flow velocity detection component 52 as a flow meter, or as a flow sensor, or as any other possible form, etc. Such adjustments and changes to the specific configuration type of the flow velocity detection component 52 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.

[0162] For example, the flow rate detection component 52 is a flow meter.

[0163] It should be noted that in practical applications, the preset setting can be any one of the wastewater settings, or the preset setting can be a different setting, etc. Such adjustments and changes to the specific setting of the preset setting do not deviate from the principles and scope of the present invention and should be included within the protection scope of the present invention.

[0164] Preferably, the preset setting is any one of the wastewater settings.

[0165] It should be noted that, in practical applications, those skilled in the art can adjust the wastewater proportional valve to a preset position before the water purifier leaves the factory, detect the preset pure water flow rate at the pure water end of the reverse osmosis membrane filter element 2, and implant it into the controller of the water purifier to obtain the preset pure water flow rate. Alternatively, after the water purifier is first installed, the wastewater proportional valve can be adjusted to a preset position to detect the preset pure water flow rate at the pure water end of the reverse osmosis membrane filter element 2, etc. Such adjustments and changes to the specific method of obtaining the preset pure water flow rate 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.

[0166] Preferably, the step of "determining the target wastewater level based on the preset pure water flow rate and the current pure water flow rate" specifically includes:

[0167] Based on the preset pure water flow rate and the current pure water flow rate, determine the regeneration degree information of the reverse osmosis membrane filter element 2;

[0168] Determine the target wastewater level based on the degree of regeneration information.

[0169] Preferably, before the water purification equipment leaves the factory, the wastewater proportional valve is adjusted to a preset position, the preset pure water flow rate at the pure water end of the reverse osmosis membrane filter element 2 is detected, and it is implanted into the controller of the water purification equipment. After cleaning the reverse osmosis membrane filter element 2, the wastewater proportional valve is adjusted to the preset position again, the current pure water flow rate at the pure water end of the reverse osmosis membrane filter element 2 is detected, and the regeneration degree information of the reverse osmosis membrane filter element 2 is determined based on the current pure water flow rate and the preset pure water flow rate.

[0170] It should be noted that, in practical applications, those skilled in the art can set the regeneration degree information as the regeneration rate, or as the regeneration level, or as any other possible type, etc. Such adjustments and changes to the specific setting type of the regeneration degree information 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.

[0171] For example, the degree of regeneration information includes the regeneration rate.

[0172] The steps of "determining the regeneration level information of reverse osmosis membrane filter element 2 based on the preset pure water flow rate and the current pure water flow rate" specifically include:

[0173] Calculate the regeneration rate W using the following formula:

[0174]

[0175] Where V0 is the preset pure water flow rate and V1 is the current pure water flow rate.

[0176] Preferably, the step of "determining the target wastewater level based on the degree of regeneration information" specifically includes:

[0177] If W≥W1, then the target wastewater level is the first level;

[0178] If W1 < W < W2, then the target wastewater level is the second level;

[0179] If W≤W2, then the target wastewater level is the third level;

[0180] The opening of the first gear is smaller than that of the second gear, and the opening of the second gear is smaller than that of the third gear.

[0181] With this setting, the target wastewater level can be determined based on the regeneration level of the reverse osmosis membrane filter element 2. When the regeneration level of the reverse osmosis membrane filter element 2 is low, the fouling rate of the reverse osmosis membrane filter element 2 can be reduced by increasing the wastewater level of the wastewater valve 211, which helps to extend the service life of the reverse osmosis membrane filter element 2 and further improves the user experience.

[0182] It should be noted that the target wastewater level is not limited to the methods described above. For example, a table showing the correspondence between the regeneration rate and the target wastewater level can be established before the water purification equipment leaves the factory. The target wastewater level can then be determined by looking up the table based on the regeneration rate W. 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.

[0183] Preferably, such as Figures 1 to 8 As shown, the water purification device of the present invention also includes a pure water component 51, and the pure water end of the reverse osmosis membrane filter element 2 is connected to the pure water component 51 through a pure water outlet pipe 5.

[0184] After cleaning the reverse osmosis membrane filter element 2 and restoring the water production mode, the control method of the present invention further includes the following steps:

[0185] Obtain the pure water quality parameters of the pure water end of reverse osmosis membrane filter element 2;

[0186] Based on the pure water quality parameters, the pure water end of the reverse osmosis membrane filter element 2 is selectively connected to the pure water use component 51.

[0187] With this setup, after cleaning the reverse osmosis membrane filter element, a small amount of cleaning agent will permeate to the pure water end of the reverse osmosis membrane filter element 2. By obtaining the pure water quality information of the pure water end of the reverse osmosis membrane filter element 2, it is possible to determine whether there is cleaning agent residue at the pure water end. If there is cleaning agent residue at the pure water end, the pure water end of the reverse osmosis membrane filter element 2 will not be connected to the pure water component 51. If there is no cleaning agent residue at the pure water end, the pure water end of the reverse osmosis membrane filter element 2 will be connected to the pure water component 51. This achieves zero pollution and zero chemical addition, further improving the user experience.

[0188] It should be noted that, in practical applications, those skilled in the art can install a water quality detection component on the pure water outlet pipe to detect the pure water quality parameters at the pure water end, or they can collect pure water from the pure water outlet component and detect the pure water quality parameters, or they can obtain the pure water quality parameters through any other possible means, etc. Such adjustments and changes to the specific methods of obtaining pure water quality parameters 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] Preferably, a water quality detection component is installed on the pure water outlet pipe to detect the pure water quality parameters at the pure water end (not shown in the figure).

[0190] It should be noted that, in practical applications, those skilled in the art do not impose any limitations on the specific configuration type of the pure water component 51, as long as it can output pure water from the reverse osmosis membrane filter 2 for user consumption. For example, the pure water component 51 can be configured as a pure water tank, with pure water filtered by the reverse osmosis membrane filter 2 directly delivered to the pure water tank for user consumption. Alternatively, the pure water component 51 can be configured as a post-filter, with pure water filtered by the reverse osmosis membrane filter 2 delivered to the post-filter to improve taste before being delivered to the user. Or, the pure water component 51 can be configured as a water outlet component (water spout or faucet), with pure water filtered by the reverse osmosis membrane filter 2 flowing directly from the water outlet component (water spout or faucet), etc. Such adjustments and changes to the specific configuration type of the pure water component 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.

[0191] Preferably, such as Figures 1 to 8 As shown, the pure water component 51 includes a post-filter cartridge. Pure water filtered by the reverse osmosis membrane cartridge 2 is delivered to the post-filter cartridge to improve the taste before being supplied to the user for drinking.

[0192] It should be noted that the present invention does not limit the specific type of pure water quality parameters. For example, the water quality parameter can be the TDS value, or the water quality parameter can be the pH value of pure water.

[0193] The following section uses the TDS value of pure water as an example to illustrate the water quality parameters.

[0194] Preferably, the water quality parameter of the pure water is the TDS value of the pure water.

[0195] The step 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 pure water quality parameters" specifically includes:

[0196] Compare the TDS value of pure water with the preset TDS value;

[0197] Determine if the TDS of pure water is greater than the preset TDS value;

[0198] Based on the judgment result, the pure water end of the reverse osmosis membrane filter element 2 is selectively connected to the pure water use component 51.

[0199] It should be noted that the connection between the pure water TDS value and the pure water component 51 is not limited to comparing the pure water TDS value with a preset TDS value and selectively connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water component 51 based on whether the pure water TDS value 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 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 pure water 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 be included within the protection scope of the present invention.

[0200] Preferably, the step 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 judgment result" specifically includes:

[0201] If the judgment result is "yes", then the pure water end of the reverse osmosis membrane filter element 2 will not be connected to the pure water use component 51.

[0202] With this setting, if 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, the pure water end of the reverse osmosis membrane filter element 2 is not connected to the pure water use component 51, which can prevent water containing detergent residue from entering the pure water use component 51, thus helping to achieve zero addition and zero chemical pollution.

[0203] Preferably, the step 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 judgment result" specifically includes:

[0204] If the judgment result is "no", then connect the pure water end of the reverse osmosis membrane filter element 2 to the pure water use component 51.

[0205] With this setting, if the judgment result is "no", it means that there is no detergent residue on the pure water end of the reverse osmosis membrane filter element 2. At this time, timely connection of the pure water end of the reverse osmosis membrane filter element 2 with the pure water component 51 can avoid water waste and further extend the service life of the reverse osmosis membrane filter element 2.

[0206] It should be noted that although this invention is introduced using the TDS value of pure water at the pure water end as an example, this is not limiting. 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 this invention, and should be included within the protection scope of this invention.

[0207] It should be noted that, without connecting the pure water end of the reverse osmosis membrane filter element 2 to the pure water component 51, the pure water end of the reverse osmosis membrane filter element 2 can be directly connected to the drain pipe in the user's usage scenario to discharge water containing detergent residue into the drain pipe. Alternatively, the pure water end of the reverse osmosis membrane filter element 2 can be connected to the wastewater outlet pipe 21 to discharge water containing detergent residue through the wastewater outlet pipe 21. Or, the pure water end of the reverse osmosis membrane filter element 2 can be connected to the inlet end of the reverse osmosis membrane filter element 2 to return water containing detergent residue to the inlet end of the reverse osmosis membrane filter element 2, filtering out the detergent through multiple cycles, 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.

[0208] Preferably, when the determination result is "yes", the control method of the present invention further includes the following steps:

[0209] Connect the pure water end of the reverse osmosis membrane filter element 2 to the wastewater outlet pipe 21 or the inlet end of the reverse osmosis membrane filter element 2.

[0210] Specifically, the following is combined with Figures 7 to 8 The following two scenarios will be used to illustrate this.

[0211] Scenario 1:

[0212] like Figure 7 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.

[0213] 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.

[0214] Scenario 2:

[0215] like Figure 8 As 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.

[0216] 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, thus discharging the pure water containing detergent and helping to achieve zero pollution and zero chemical addition. 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 to prevent users from drinking water with a high TDS value.

[0217] In a second aspect, the present invention also provides a water purification device including a controller configured to perform any of the control methods described above.

[0218] 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.

[0219] For example, the water purification device is a water purifier.

[0220] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A control method for a water purification device, characterized in that, The water purification equipment includes a reverse osmosis membrane filter element, a cleaning component, a wastewater outlet pipe, and a main inlet pipe. The cleaning component is used to deliver cleaning solution to the reverse osmosis membrane filter element for cleaning. The wastewater outlet pipe is connected to the wastewater end of the reverse osmosis membrane filter element. The main inlet water line is connected to the inlet end of the reverse osmosis membrane filter element. After the cleaning solution is discharged from the reverse osmosis membrane filter element, water in the main inlet water line enters the reverse osmosis membrane filter element to rinse it. The rinsing water generated flows out through the wastewater outlet pipe. When the water purification equipment flushes the reverse osmosis membrane filter element, the control method includes the following steps: Obtain the current water quality parameters in the wastewater outlet pipe; Obtain the target water quality parameters; Based on the current water quality parameters and the target water quality parameters, the water purification equipment can selectively stop flushing the reverse osmosis membrane filter element.

2. The control method for a water purification device according to claim 1, characterized in that, The step of "selectively stopping the flushing of the reverse osmosis membrane filter element by the water purification equipment according to the current water quality parameters and the target water quality parameters" specifically includes: Calculate the difference Δ = |D1 - D0|; Compare the difference Δ with the first preset value A1; Based on the comparison results, the water purification equipment is selectively stopped from flushing the reverse osmosis membrane filter element; Where D1 is the current water quality parameter, D0 is the target water quality parameter, and A1≥0.

3. The control method for a water purification device according to claim 2, characterized in that, The step of "selectively stopping the flushing of the reverse osmosis membrane filter element by the water purification equipment based on the comparison results" specifically includes: If △>A1, then the water purification equipment will not stop flushing the reverse osmosis membrane filter element; And / or, if △1≤A1, then the water purification equipment stops flushing the reverse osmosis membrane filter element.

4. The control method for a water purification device according to claim 1, characterized in that, The water purification equipment also includes a wastewater valve installed on the wastewater outlet pipe. The wastewater valve has a flushing position and a wastewater position. When the water purification equipment flushes the reverse osmosis membrane filter element, the wastewater valve is located in the flushing position. After the water purification equipment stops flushing the reverse osmosis membrane filter element, the control method further includes the following steps: Adjust the wastewater valve to the wastewater setting.

5. The control method for a water purification device according to claim 4, characterized in that, The wastewater valve is an adjustable wastewater proportional valve, and the wastewater valve includes at least two wastewater settings. The step of "adjusting the wastewater valve to the wastewater setting" specifically includes: Adjust the wastewater valve to the preset position and enable the water purification equipment to execute the water production mode; Obtain the current pure water flow rate at the pure water end of the reverse osmosis membrane filter element; Obtain the preset pure water flow rate corresponding to the preset gear position; The target wastewater level is determined based on the current pure water flow rate and the preset pure water flow rate. Adjust the wastewater valve to the target wastewater level.

6. The control method for a water purification device according to claim 5, characterized in that, The step of "determining the target wastewater level based on the current pure water flow rate and the preset pure water flow rate" specifically includes: Based on the current pure water flow rate and the preset pure water flow rate, determine the regeneration degree information of the reverse osmosis membrane filter element; Based on the regeneration level information, the target wastewater level is determined.

7. The control method for a water purification device according to claim 1, characterized in that, The water purification equipment also includes a pure water supply component, which is used to output pure water from the pure water end of the reverse osmosis membrane filter element for users to drink. After the reverse osmosis membrane filter element has been flushed and the water production mode has been restored, the control method further includes the following steps: Obtain the pure water quality parameters of the pure water end of the reverse osmosis membrane filter element; Based on the pure water quality parameters, the pure water end of the reverse osmosis membrane filter element is selectively connected to the pure water use component.

8. The control method for a water purification device according to claim 7, characterized in that, The step of "selectively connecting the pure water end of the reverse osmosis membrane filter element to the pure water use component according to the pure water quality parameters" specifically includes: The pure water quality parameters are compared with preset water quality parameters; Determine whether the pure water quality parameters are greater than the preset water quality parameters; Based on the judgment result, the pure water end of the reverse osmosis membrane filter element is selectively connected to the pure water use component.

9. The control method for a water purification device according to any one of claims 1 to 8, characterized in that, The water quality parameters include at least one of TDS value and pH value.

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

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