Water purification system and water purifier

Abstract

The invention provides a water purification system and a water purifier, and is characterized in that the water purification system comprises a booster pump, a detection module, a first membrane filter element and a second membrane filter element, a purified water outlet of the first membrane filter element is communicated with an inlet of the second membrane filter element, and the water purification system enables purified water of the second membrane filter element to flow back to the front of the booster pump. After being mixed with tap water, the water enters the first membrane filter element again for secondary filtration, and a produced water outlet of the secondary membrane filter element is communicated with a faucet. According to the water purification system and the water purifier provided by the invention, the recovery rate of the first-stage or second-stage membrane filter element is adjusted through an internal software control program according to the actually measured mineral content of the detection module, so that the relative content of monovalent and divalent mineral ions in water discharged from the faucet of the water purifier is automatically and accurately regulated and controlled; the requirements of different users in different regions on customization and quantitative regulation and control of the mineral content are met.

Description

Technical Field

[0001] This invention relates to the field of water purifier technology, and more particularly to water purification systems and water purifiers. Background Technology

[0002] With the increasing popularity of water purification products, simple water purification functions are no longer sufficient to meet user needs. Users want purified water to be safe and reliable, while also retaining minerals. Moreover, different groups of people have different requirements for the mineral content in water: young children and the elderly need to supplement more of the minerals required by the human body, so they require water with a higher concentration of mineral ions; young people have better physical health and higher requirements for the taste of water, so they need water with a lower concentration of mineral ions.

[0003] Existing filter cartridges are typically designed with a fixed rejection rate, thus they cannot automatically adjust the mineral content in purified water. To adjust the mineral content, it is necessary to replace the filter cartridge or adjust the wastewater ratio. Therefore, they cannot dynamically respond to water quality fluctuations, resulting in a poor user experience; they also have the disadvantage of insufficient flow stability. Summary of the Invention

[0004] The main objective of this invention is to propose a water purification system and water purifier, which aims to solve the problem that existing water purifiers do not accurately adjust the concentration ratio of monovalent and divalent mineral ions in the effluent under different influent water qualities.

[0005] To achieve the above objectives, the present invention proposes a water purification system, comprising: The first membrane filter element and the booster pump are connected to the raw water inlet and the first inlet of the first membrane filter element, respectively. The first inlet, the first clean outlet, and the first concentrated outlet of the first membrane filter element are connected to the first water inlet pipeline, the first clean water pipeline, and the first concentrated water pipeline, respectively. The first clean water pipeline is equipped with a first one-way valve.

[0006] The first concentrate valve and the first solenoid valve are respectively installed on the first concentrate pipeline and the inlet pipeline upstream of the booster pump. The first concentrate valve has a flow-limiting adjustment and a fully open state, and the first solenoid valve has an open and closed state.

[0007] The second membrane filter element is connected to the main water inlet pipeline, the booster pump, the first membrane filter element, and the second membrane filter element in sequence according to the water flow direction. The second inlet, the second clean outlet, and the second product outlet of the second membrane filter element are respectively connected to the first clean water pipeline, the second return pipeline, and the second product water pipeline. The outlet of the second return pipeline is connected to the first inlet of the first tee. The second inlet and the third outlet of the first tee are respectively connected to the outlet of the first solenoid valve and the inlet of the booster pump. A second check valve is provided on the second return pipeline.

[0008] In one embodiment, the water purification system further includes a faucet, and the second water production pipeline is connected to the faucet. The second water production pipeline is equipped with a second water production valve and a high-pressure switch. The second water production valve has a flow-limiting adjustment and a fully open state. When the faucet is turned on, the high-pressure switch is triggered to transmit an open signal, and the water purification system is in the operating state: the first solenoid valve and the booster pump are open, and the first concentrate valve and the second water production valve are in the flow-limiting or adjustment state; when the faucet is closed, the high-pressure switch is triggered to transmit a close signal, and the water purification system is in the closed state: the first solenoid valve and the booster pump are closed.

[0009] In one embodiment, a second return valve is also provided on the second return pipeline of the water purification system. The second return valve has a flow-limiting adjustment and a fully open state.

[0010] In one embodiment, the water purification system further includes a faucet, and the second water production pipeline is connected to the faucet. A high-pressure switch is provided on the second water production pipeline. When the faucet is turned on, the high-pressure switch is triggered to transmit an open signal, and the water purification system is in operation: the first solenoid valve and the booster pump are open, and the first concentrate valve is in a flow-limiting or regulating state; when the faucet is turned off, the high-pressure switch is triggered to transmit a close signal, and the water purification system is in a closed state: the first solenoid valve and the booster pump are closed.

[0011] In one embodiment, the first water purification pipeline of the water purification system includes a first main water purification pipeline, a first branch water purification pipeline, and a second branch water purification pipeline. A first check valve and a second three-way valve are installed on the first main water purification pipeline. The inlet and outlet of the first check valve are respectively connected to a first net outlet and the first inlet of the second three-way valve. The second and third outlets of the second three-way valve are respectively connected to the first branch water purification pipeline and the second branch water purification pipeline. A first water purification valve and a third three-way valve are sequentially installed on the second branch water purification pipeline. The outlet of the first water purification valve is connected to the first inlet of the third three-way valve. The outlet of the first branch water purification pipeline is connected to the second inlet. The second return pipeline includes a second front-end return pipeline and a second rear-end return pipeline. A second check valve is installed on the second front-end return pipeline. The inlet and outlet of the second check valve are respectively connected to the second net outlet and the second inlet of the third three-way valve. The second rear-end pipeline is respectively connected to the third outlet of the third three-way valve and the first inlet of the first three-way valve. The first water purification valve has an open or closed state.

[0012] In one embodiment, the first water purification pipeline of the water purification system includes a first main water purification pipeline, a first branch water purification pipeline, and a second branch water purification pipeline. The first main water purification pipeline is equipped with a first one-way valve and a fourth three-way valve. The inlet and outlet of the first one-way valve are respectively connected to a first water outlet and the first inlet of the fourth three-way valve. The second and third outlets of the fourth three-way valve are respectively connected to the first branch water purification pipeline and the second branch water purification pipeline. The second branch water purification pipeline is sequentially equipped with a second water purification valve and a fifth three-way valve. The outlet of the second water purification valve is connected to the first inlet of the fifth three-way valve. The outlet of the first branch water purification pipeline is connected to the second inlet. The second water production pipeline includes a second front-end water production pipeline and a second rear-end water production pipeline. The second front-end water production pipeline is equipped with a second water production valve. The inlet and outlet of the second water production valve are respectively connected to a second water outlet and the second inlet of the fifth three-way valve. The second rear-end water production pipeline is connected to the third outlet of the fifth three-way valve and the inlet of the faucet. A high-pressure switch is installed on the pipeline. The second water purification valve has flow-limiting adjustment and a fully open state.

[0013] In one embodiment, the first concentrate pipeline of the water purification system includes a first main concentrate pipeline, a first branch concentrate pipeline, and a first return pipeline. The first main concentrate pipeline is connected to a first concentrate outlet and a first inlet of a sixth three-way valve. A first concentrate valve is provided on the first branch concentrate pipeline, and its inlet is connected to a second outlet of the sixth three-way valve. The inlet and outlet of the first return pipeline are connected to a third outlet of the sixth three-way valve and a first inlet of a seventh three-way valve, respectively. A first return valve and a third check valve are provided on the pipeline. The second inlet and third outlet of the seventh three-way valve are connected to the outlet of a first solenoid valve and the inlet of a booster pump on the main inlet pipeline, respectively. The first return valve has a flow-limiting adjustment and a fully open state.

[0014] In one embodiment, the water purification system further includes a pre-filter and a post-filter, wherein the pre-filter is disposed on the inlet pipe upstream of the first membrane filter and the post-filter is disposed on the second product water pipe.

[0015] In one embodiment, the water purification system includes a pre-filter and a post-filter. The pre-filter is disposed on the inlet pipe upstream of the first membrane filter, and the post-filter is disposed on the first purified water pipe.

[0016] In one embodiment, the water purification system further includes a pre-filter and a post-filter. The pre-filter is disposed on the inlet pipeline upstream of the first membrane filter, and the post-filter is disposed on the first main water purification pipeline, the first branch water purification pipeline, or the second branch water purification pipeline.

[0017] In one embodiment, the pre-filter or post-filter contains mineralized filter media.

[0018] In one embodiment, the water purification system further includes a detection module, which includes at least a first, a second, and a third detection module, located on the upstream pipeline of the first inlet, the first purified water pipeline or the first main purified water pipeline, and the second product water pipeline or the second downstream product water pipeline, respectively. The mineral ion removal rate of the first membrane filter can be calculated based on the concentration data of divalent and ionic mineral ions detected by the first and second modules, and the mineral ion retention rate of the second membrane filter can be calculated based on the concentration data of divalent and ionic mineral ions detected by the second and third modules.

[0019] In one embodiment, a PLC controller is installed within the water purifier of the water purification system. The detection data from the detection modules are stored on the PLC controller. The data processing program set in the PLC controller automatically determines whether adjustment is needed and selects the appropriate execution code. The PLC controller is equipped with a first module and a second module. The first module includes a detection module, a first judgment module, a calculation unit, and an adjustment unit. The detection module controls the first, second, and third detection modules to detect the solution in the water path. The calculation unit calculates and compares the initial system settings with the actual concentrations of monovalent and divalent ions. The first judgment module compares the input information with preset rules and triggers subsequent operations based on the judgment result. The adjustment unit is used for deviation correction and adjustment. The second module includes a detection module, a first judgment module, a calculation module, and an adjustment module. The detection module controls the first, second, and third detection modules to detect the solution in the water path. The calculation module includes a collection unit, a first calculation unit, an acquisition unit, and a second calculation unit. The initial state or adjusted concentration detection data is stored in the collection unit, and the process concentration data during system debugging is stored in the acquisition unit. The calculation module is used to calculate and compare the target set value with the actual concentrations of monovalent and divalent ions. The first judgment module is used to compare the input information with preset rules and trigger subsequent operations based on the judgment result. The adjustment unit is used for deviation correction and adjustment, and includes a first adjustment unit, a second adjustment unit, a collection unit, and an acquisition unit.

[0020] This invention also proposes a method for adjusting the mineral concentration in the effluent of a water purification system, specifically including the following steps: Step 1: Initial state of the equipment: When the faucet is turned on, the high-pressure switch is triggered to transmit an open signal, and the water purification system is in operation: the first solenoid valve is open, the booster pump is turned on, and at least one other solenoid valve is in a flow-limited or fully open state; at this time, the appropriate initial value of the recovery rate of each unit is set according to the target value requirements of the concentration of monovalent and divalent mineral ions.

[0021] Step 2: Use the first detection module, the second detection module, and the third detection module to detect the concentration of monovalent and divalent ions in the solution in the water pipeline where it is located, and obtain the corresponding first detection data, second detection data, and third detection data; Step 3: Compare the concentrations of monovalent and divalent mineral ions in the third detection data with the target concentration values. The PLC controller will make judgments based on different instantaneous conditions, start the corresponding adjustment program code, and execute adjustment actions. The adjustment actions include adjusting the size of the flow-limiting opening of at least one solenoid valve.

[0022] Step 4: After adjustment by the PLC controller, when the concentrations of monovalent and divalent mineral ions in the third detection data are consistent with the set concentration values, the controller determines that the system should maintain this state.

[0023] The beneficial effects of this invention are as follows: This invention provides a water purification system and water purifier. Based on the measured mineral content of the detection module, the recovery rate of the primary or secondary membrane filter is adjusted through the internal software control program, so as to achieve automatic and flexible precise control of the concentration ratio of monovalent and divalent mineral ions in the water from the faucet of the water purifier, thereby meeting the needs of different users in different regions for customized and quantitative control of mineral content. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0025] Figure 1 This is a filtration circuit diagram of the water purification system in Embodiment 1 of the present invention; Figure 2 This is a filtration circuit diagram of the water purification system in Embodiment 2 of the present invention; Figure 3 This is a filtration circuit diagram of the water purification system in Embodiment 3 of the present invention; Figure 4 This is a filtration circuit diagram of the water purification system in Embodiment 4 of the present invention; Figure 5 This is a filtration circuit diagram of the water purification system in Embodiment 5 of the present invention; Figure 6 This is a filtration circuit diagram of the water purification system in Embodiment 6 of the present invention; Figure 7 This is a filtration circuit diagram of the water purification system in Embodiment 7 of the present invention; Figure 8 This is a filtration circuit diagram of the water purification system in Embodiment 8 of the present invention; Figure 9 This is a filtration circuit diagram of the water purification system in Embodiment 9 of the present invention; Figure 10 This is a flowchart of the mineral adjustment method in the water purification system of Embodiment 10 of the present invention; Figure 11 A schematic diagram of the first module inside the water purifier of Embodiment 10 of the present invention; Figure 12 A schematic diagram of the second module inside the water purifier of Embodiment 10 of the present invention; Reference numerals: 1-First solenoid valve, 2-First tee, 3-Main inlet water pipeline, 4-Booster pump, 5-First detection module, 6-First inlet water pipeline, 7-First membrane filter element, 8-First concentrate pipeline, 9-First concentrate valve, 10-First purified water pipeline, 11-First check valve, 12-Second detection module, 13-Second membrane filter element, 14-Second reflux pipeline, 15-Second check valve, 16-Second product water pipeline, 17-Second product water valve, 18-Third detection module, 19-High pressure switch, 20-Faucet, 21-Second reflux valve, 22-First purified water valve, 23-First main purified water pipeline, 24-First branch purified water pipeline, 25-Second branch purified water pipeline, 26-Second tee, 27-Third tee 28-Second pre-return pipeline, 29-Second post-return pipeline, 30-First main purified water pipeline, 31-Fourth tee, 32-Second branch purified water pipeline, 33-First branch purified water pipeline, 34-Second purified water valve, 35-Fifth tee, 36-Second pre-product water pipeline, 37-Second post-product water pipeline, 38-Sixth tee, 39-First return pipeline, 40-First return valve, 41-Third check valve, 42-Seventh tee, 43-First branch concentrate pipeline, 44-First main concentrate pipeline, 45-Pre-filter, 46-Post-filter cartridge The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation Example 1

[0026] like Figure 1 As shown, the water purification system is connected in sequence according to the water flow direction, including a main inlet pipeline 3, a booster pump 4, a first inlet pipeline 6, a first membrane filter element 7, a first purified water pipeline 10, and a second membrane filter element 13. A first solenoid valve 1 is installed on the main inlet pipeline 3. The first purified water pipeline 10 of the first membrane filter element 7 is connected to the second inlet of the second membrane filter element 13. A first detection module 5 is installed on the first inlet pipeline 6 between the booster pump 4 and the first-stage membrane filter element 7. A first check valve 11 and a second detection module 12 are installed on the first purified water pipeline 10. The first solenoid valve 1 has an open or closed state. The second outlet of the second membrane filter element 13 is connected to the second water production line 16. The second water production line 16 is connected in sequence with the second water production valve 17, the third detection module 18, and the high pressure switch 19 in the direction of water flow. The other end of the second water production line 16 is connected to the faucet 20. The second water production valve 17 has a flow limiting adjustment or a fully open state. The second net outlet of the second membrane filter element 13 is connected to the second return pipeline 14. The second return pipeline 14 is equipped with a second one-way valve 15. The second return pipeline 14 is connected to the main water inlet pipeline 3 through the first tee 2. The first concentrated outlet of the first membrane filter element 7 is connected to the first concentrated water pipeline 8. The first concentrated water pipeline 8 is equipped with a first concentrated water valve 9, which has a flow-limiting adjustment or a fully open state.

[0027] When faucet 20 is turned on, high-pressure switch 19 is triggered to transmit an open signal, and the water purification system is in operation. The first solenoid valve 1 and booster pump 4 are open, and the first concentrate valve 9 and second product water valve 17 are in the adjustment or fully open state. At this time, the water flow direction is: water inlet → main water inlet pipeline 3 → booster pump 4 → first water inlet pipeline 6 → first membrane filter 7 (concentrate is discharged from the first concentrate pipeline 8) → first purified water pipeline 10 → second membrane filter 13 (purified water flows back from the first return pipeline 14 to before booster pump 4) → second product water pipeline 16 → faucet 20. When faucet 20 is turned off, high-pressure switch 19 is triggered to transmit a close signal, and the water purification system is in the closed state: the first solenoid valve 1 and booster pump 4 are closed.

[0028] The principle of this water purification system for adjusting the relative content of monovalent and divalent mineral ions is as follows: ① By adjusting the opening of the first concentrate valve 9, the recovery rate of the first membrane filter element 7 changes, thereby changing the ratio of monovalent and divalent mineral ion concentrations in the purified water from the first membrane filter element 7. ② By adjusting the opening of the second product water valve 17, the recovery rate of the second membrane filter element 13 changes, thereby adjusting the ratio of monovalent and divalent ion concentrations in the product water from the second membrane filter element 13. The ratio of monovalent and divalent ion concentrations in the faucet water of this water purification system is determined by the opening of the first concentrate valve 9 and the second product water valve 17. Example 2

[0029] like Figure 2 As shown, based on Embodiment 1, the second return line 14 of this embodiment is further provided with a second return valve 21, wherein the second return valve 21 is located between the second check valve 15 and the first three-way valve 2, and the second return valve 21 has a flow-limiting adjustment or a fully open state.

[0030] When faucet 20 is turned on, high-pressure switch 19 is triggered to transmit an open signal, and the water purification system is in operation. The first solenoid valve 1 and booster pump 4 are open, and the first concentrate valve 9, second product water valve 17, and second return valve 21 are in the adjustment or fully open state. At this time, the water flow direction is: water inlet → main water inlet pipeline 3 → booster pump 4 → first water inlet pipeline 6 → first membrane filter 7 (concentrate is discharged from the first concentrate pipeline 8) → first purified water pipeline 10 → second membrane filter 13 (purified water flows back from the first return pipeline 14 to before booster pump 4) → second product water pipeline 16 → faucet 20. When faucet 20 is turned off, high-pressure switch 19 is triggered to transmit a close signal, and the water purification system is in the closed state: the first solenoid valve 1 and booster pump 4 are closed.

[0031] The principle of this water purification system for adjusting the relative content of monovalent and divalent mineral ions is as follows: ① By adjusting the opening of the first concentrate valve 9, the recovery rate of the first membrane filter element 7 changes, thereby changing the ratio of monovalent and divalent mineral ion concentrations in the purified water of the first membrane filter element 7. ② By adjusting the opening of the second product water valve 17 and the second return valve 21, the recovery rate of the second membrane filter element 13 changes, thereby adjusting the ratio of monovalent and divalent ion concentrations in the product water of the second membrane filter element 13. The ratio of monovalent and divalent ion concentrations in the faucet water of this water purification system is determined by the opening of the first concentrate valve 9, the second product water valve 17, and the second return valve 21. Example 3

[0032] like Figure 3 As shown, based on Embodiment 1, the second water production valve 17 is removed from the second water production pipeline 16 in this embodiment.

[0033] When faucet 20 is turned on, high-pressure switch 19 is triggered to transmit an open signal, and the water purification system is in operation. The first solenoid valve 1 and booster pump 4 are open, and the first concentrate valve 9 is in the adjustment or fully open state. At this time, the water flow direction is: water inlet → main water inlet pipeline 3 → booster pump 4 → first water inlet pipeline 6 → first membrane filter 7 (concentrate is discharged from the first concentrate pipeline 8) → first purified water pipeline 10 → second membrane filter 13 (purified water flows back from the first return pipeline 14 to before booster pump 4) → second product water pipeline 16 → faucet 20. When faucet 20 is turned off, high-pressure switch 19 is triggered to transmit a close signal, and the water purification system is in the closed state: the first solenoid valve 1 and booster pump 4 are closed.

[0034] The principle of this water purification system for adjusting the relative content of monovalent and divalent mineral ions is as follows: by adjusting the opening of the first concentrate valve 9, the recovery rate of the first membrane filter element 7 changes, thereby changing the ratio of monovalent and divalent mineral ion concentrations in the purified water of the first membrane filter element 7. The ratio of monovalent and divalent ion concentrations in the faucet water of this water purification system is determined by the opening of the first concentrate valve 9. Example 4

[0035] like Figure 4As shown, based on Embodiment 1, the first water purification pipeline 10 in this embodiment includes a first main water purification pipeline 23, a first branch water purification pipeline 24, and a second branch water purification pipeline 25. The first main water purification pipeline 23 is equipped with a first one-way valve 11, a second detection module 12, and a second three-way valve 26. The inlet and outlet of the first one-way valve 11 are respectively connected to the first clean outlet and the first inlet of the second three-way valve 26. The second and third outlets of the second three-way valve 26 are respectively connected to the first branch water purification pipeline 24 and the second branch water purification pipeline 25. The second branch water purification pipeline 25 is sequentially equipped with a first water purification valve 22 and a third three-way valve 27. The outlet of the first water purification valve 22 is connected to the first inlet of the third three-way valve 27. The outlet of the first branch water purification pipeline 24 is connected to the second inlet of the second membrane filter element 7. The first water purification valve 22 has an open or closed state.

[0036] The second return line 14 includes a second front return line 28 and a second rear return line 29. The second front return line 28 is equipped with a second one-way valve 15. The inlet and outlet of the second one-way valve 15 are respectively connected to the second net outlet of the second membrane filter element 7 and the second inlet of the third tee 27. The second rear line 29 is respectively connected to the third outlet of the third tee 27 and the first inlet of the first tee 2.

[0037] When faucet 20 is turned on, high-pressure switch 19 is triggered to transmit an open signal, and the water purification system is in operation. The first solenoid valve 1 and booster pump 4 are open, the first purified water valve 22 is closed, and the first concentrated water valve 9 and the second product water valve 17 are in the adjustment or fully open state. At this time, the water flow direction is: water inlet → main water inlet pipeline 3 → booster pump 4 → first water inlet pipeline 6 → first membrane filter 7 (concentrated water is discharged from the first concentrated water pipeline 8) → first purified water pipeline 10 → second membrane filter 13 (purified water flows back from the first return pipeline 14 to before booster pump 4) → second product water pipeline 16 → faucet 20. When faucet 20 is turned off, high-pressure switch 19 is triggered to transmit a close signal, and the water purification system is in the closed state: the first solenoid valve 1 and booster pump 4 are closed.

[0038] The principle by which this water purification system adjusts the relative content of monovalent and divalent mineral ions is the same as in Example 1. Example 5

[0039] like Figure 5As shown, based on Embodiment 1, the first water purification pipeline 10 in this embodiment includes a first main water purification pipeline 30, a first branch water purification pipeline 33, and a second branch water purification pipeline 32. The first main water purification pipeline 30 is equipped with a first one-way valve 11 and a fourth three-way valve 31. The inlet and outlet of the first one-way valve 11 are respectively connected to the first clean outlet of the first membrane filter element 7 and the first inlet of the fourth three-way valve 31. The second and third outlets of the fourth three-way valve 31 are respectively connected to the first branch water purification pipeline 33 and the second branch water purification pipeline 32. The second branch water purification pipeline 32 is sequentially equipped with a second water purification valve 34 and a fifth three-way valve 35. The outlet of the second water purification valve 34 is connected to the first inlet of the fifth three-way valve 35. The outlet of the first branch water purification pipeline 33 is connected to the second inlet of the second membrane filter element 13. The second water purification valve 34 has a flow-limiting adjustment and a fully open state.

[0040] The second water production pipeline 16 includes a second front water production pipeline 36 and a second rear water production pipeline 37. The second front water production pipeline 36 is equipped with a second water production valve 17. The inlet and outlet of the second water production valve 17 are connected to the second outlet of the second membrane filter element 13 and the second inlet of the fifth three-way valve 35, respectively. The inlet and outlet of the second rear water production pipeline 37 are connected to the third outlet of the fifth three-way valve 35 and the inlet of the faucet 20, respectively. The pipeline is equipped with a third detection module 18 and a high-pressure switch 19. The second water production valve 17 has a flow-limiting adjustment and a fully open state.

[0041] When faucet 20 is turned on, high-pressure switch 19 is triggered to transmit an open signal, and the water purification system is in operation. The first solenoid valve 1 and booster pump 4 are open, and the first concentrate valve 9, second product water valve 17, and second purified water valve 34 are in the adjustment or fully open state. At this time, the water flow direction is: water inlet → main water inlet pipeline 3 → booster pump 4 → first water inlet pipeline 6 → first membrane filter 7 (concentrate is discharged from the first concentrate pipeline 8) → first purified water pipeline 10 → second membrane filter 13 (purified water flows back from the first return pipeline 14 to before booster pump 4) → second product water pipeline 16 → faucet 20. When faucet 20 is turned off, high-pressure switch 19 is triggered to transmit a close signal, and the water purification system is in the closed state: the first solenoid valve 1 and booster pump 4 are closed.

[0042] The principle of this water purification system for adjusting the relative content of monovalent and divalent mineral ions is as follows: ① By adjusting the opening of the first concentrate valve 9, the recovery rate of the first membrane filter element 7 changes, thereby changing the ratio of monovalent and divalent mineral ion concentrations in the purified water from the first membrane filter element 7. ② By adjusting the opening of the second product water valve 17 and the second purified water valve 34, the recovery rate of the second membrane filter element 13 changes, thereby adjusting the ratio of monovalent and divalent ion concentrations in the product water from the second membrane filter element 13. The ratio of monovalent and divalent ion concentrations in the faucet water of this water purification system is determined by the opening of the first concentrate valve 9, the second product water valve 17, and the second purified water valve 34. Example 6

[0043] like Figure 6 As shown, based on Embodiment 1, the first concentrate pipeline 8 in this embodiment includes a first main concentrate pipeline 44, a first branch concentrate pipeline 43, and a first return pipeline 39. The first main concentrate pipeline 44 is connected to the first concentrate outlet of the first membrane filter element 7 and the first inlet of the sixth three-way valve 38, respectively. The first branch concentrate pipeline 43 is equipped with a first concentrate valve 8, the inlet of which is connected to the second outlet of the sixth three-way valve 38. The inlet and outlet of the first return pipeline 39 are connected to the third outlet of the sixth three-way valve 38 and the first inlet of the seventh three-way valve 42, respectively. The pipeline is equipped with a first return valve 40 and a third check valve 41. The second inlet and third outlet of the seventh three-way valve 42 are connected to the outlet of the first solenoid valve 1 and the inlet of the booster pump 4 on the main water inlet pipeline, respectively. The first return valve 40 has a flow-limiting adjustment and a fully open state.

[0044] When faucet 20 is turned on, high-pressure switch 19 is triggered to transmit an open signal, and the water purification system is in operation. The first solenoid valve 1 and booster pump 4 are open, and the first concentrate valve 9, second product water valve 17, and first return valve 40 are in the adjustment or fully open state. At this time, the water flow direction is: water inlet → main water inlet pipeline 3 → booster pump 4 → first water inlet pipeline 6 → first membrane filter 7 (concentrate is discharged from the first concentrate distribution pipeline 43 and returns to the pump 4 through the first return pipeline 39) → first purified water pipeline 10 → second membrane filter 13 (purified water returns to the booster pump 4 from the first return pipeline 14) → second product water pipeline 16 → faucet 20; when faucet 20 is turned off, high-pressure switch 19 is triggered to transmit a close signal, and the water purification system is in the closed state: the first solenoid valve 1 and booster pump 4 are closed.

[0045] The principle of this water purification system for adjusting the relative content of monovalent and divalent mineral ions is as follows: ① By adjusting the opening of the first concentrate valve 9 and the first return valve 40, the recovery rate of the first membrane filter element 7 changes, thereby changing the ratio of monovalent and divalent mineral ion concentrations in the purified water of the first membrane filter element 7. ② By adjusting the opening of the second product water valve 17, the recovery rate of the second membrane filter element 13 changes, thereby adjusting the ratio of monovalent and divalent ion concentrations in the product water of the second membrane filter element 13. The ratio of monovalent and divalent ion concentrations in the faucet water of this water purification system is determined by the opening of the first concentrate valve 9, the second product water valve 17, and the first return valve 40. Example 7

[0046] like Figure 7 As shown, based on Embodiment 1, this embodiment also includes a pre-filter 45 and a post-filter 46. The pre-filter 45 is disposed on the upstream pipeline of the first membrane filter 7, and the post-filter 46 is disposed on the second product water pipeline 16.

[0047] The principle by which this water purification system adjusts the relative content of monovalent and divalent mineral ions is the same as in Example 1. Example 8

[0048] like Figure 8 As shown, based on Embodiment 1, this embodiment also includes a pre-filter 45 and a post-filter 46. The pre-filter 45 is disposed on the upstream pipeline of the first membrane filter 7, and the post-filter 46 is disposed on the first purified water pipeline 10.

[0049] The principle by which this water purification system adjusts the relative content of monovalent and divalent mineral ions is the same as in Example 1. Example 9

[0050] like Figure 9 As shown, based on Embodiment 5, this embodiment also includes a pre-filter 45 and a post-filter 46. The pre-filter 45 is disposed on the upstream pipeline of the first membrane filter 7, and the post-filter 46 is disposed on the first water separation pipeline 33.

[0051] The principle by which this water purification system adjusts the relative content of monovalent and divalent mineral ions is the same as in Example 5. Example 10

[0052] The method for mineral conditioning using this water purification system includes the following steps: Step 1: Initial state of the system: Set the recovery rate X of the first membrane filter element, its permeate flow rate Q1, and its concentrate flow rate Q2, X = Q1 / (Q1 + Q2); Set the recovery rate Y of the second membrane filter element, its permeate flow rate Q3, and its concentrate flow rate Q4, Y = Q3 / Q1; Step 2: Use the first detection module, the second detection module, and the third detection module to detect the concentration of monovalent and divalent solutions in the water pipeline where it is located, and obtain the corresponding first detection data, second detection data, and third detection data; Step 3: Compare the concentrations of monovalent and divalent ions in the third detection data with the set concentration values, and make different judgments based on different situations. Four scenarios may occur during the comparison: 1. When the concentration of monovalent valence is less than or equal to the set value and the concentration of divalent valence is equal to the set value, the condition is determined as negative, and the initial state is maintained; 2. When the concentration of monovalent ions is greater than the set value and the concentration of divalent ions is equal to the set value, it is judged as yes. The rejection rates of monovalent and divalent ions need to be adjusted, and the program is executed. Based on the concentration data of the first, second, and third detection modules, the opening of the wastewater valve and the return valve is adjusted. Finally, when the concentration of monovalent ions is less than or equal to the set value and the concentration of divalent ions is equal to the set value, it is judged as no, and this state is maintained. 3. When the monovalent concentration equals the set value and the divalent concentration does not equal the set value, it is judged as yes. The rejection rates of monovalent and divalent ions need to be adjusted, and the program is executed. Based on the concentration data of the first, second, and third detection modules, the opening of the wastewater valve and the return valve is adjusted. Finally, when the monovalent concentration is less than or equal to the set value and the divalent concentration equals the set value, it is judged as no, and this state is maintained. 4. When the concentration of monovalent ions is greater than the set value and the concentration of divalent ions is not equal to the set value, it is judged as yes. The rejection rates of monovalent and divalent ions need to be adjusted, and the program is executed. Based on the concentration data of the first, second and third detection modules, the opening of the wastewater valve and the return valve is adjusted. Finally, when the concentration of monovalent ions is less than or equal to the set value and the concentration of divalent ions is equal to the set value, it is judged as no. This state is maintained.

[0053] In this embodiment, the water purifier is equipped with a PLC controller. The detection data of the detection module is stored on the PLC controller. The data processing program set in the PLC controller automatically determines whether it is necessary to adjust and select the execution program code. The PLC controller is equipped with a first module and a second module respectively. The first module includes a detection module, a first judgment module, a calculation unit, and an adjustment unit. The detection module controls the first detection module, the second detection module, and the third detection module to perform detection. The calculation unit is used to calculate and compare the initial set value of the system with the actual concentrations of monovalent and divalent ions. The first judgment module is used to compare the input information with the preset rules and trigger subsequent operations based on the judgment result. The adjustment unit is used for deviation correction and adjustment. The second module includes a detection module, a first judgment module, a calculation module, and an adjustment module. The detection module controls the first, second, and third detection modules to perform detection. The calculation module includes a collection unit, a first calculation unit, an acquisition unit, and a second calculation unit. Initial or adjusted concentration detection data is stored in the collection unit, while process concentration data during system debugging is stored in the acquisition unit. The calculation module is used to calculate and compare the target set value with the actual concentrations of monovalent and divalent ions. The first judgment module is used to compare the input information with preset rules and trigger subsequent operations based on the judgment result. The adjustment unit is used for deviation correction and adjustment and includes a first adjustment unit, a second adjustment unit, a collection unit, and an acquisition unit.

[0054] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. The various components mentioned in this invention are common technologies in the existing field. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A water purification system, characterized in that, include: The first membrane filter element and the booster pump are connected to the raw water inlet and the first inlet of the first membrane filter element, respectively. The first inlet, the first clean outlet, and the first concentrated outlet of the first membrane filter element are connected to the first water inlet pipeline, the first clean water pipeline, and the first concentrated water pipeline, respectively. The first clean water pipeline is equipped with a first check valve. The first concentrate valve and the first solenoid valve are respectively installed on the first concentrate pipeline and the main inlet pipeline upstream of the booster pump. The first concentrate valve has a flow-limiting adjustment and a fully open state, and the first solenoid valve has an open and closed state.

2. The water purification system according to claim 1, characterized in that... It also includes a second membrane filter element, the second inlet, the second net outlet, and the second product outlet of the second membrane filter element are respectively connected to the first clean water pipeline, the second return pipeline, and the second product water pipeline, the outlet of the second return pipeline is connected to the first inlet of the first tee, the second inlet and the third outlet of the first tee are respectively connected to the outlet of the first solenoid valve and the inlet of the booster pump, and a second check valve is provided on the second return pipeline.

3. A water purification system according to claim 2, characterized in that... It also includes a faucet, the second water production pipeline is connected to the faucet, the second water production pipeline is equipped with a second water production valve and a high-pressure switch, and the second water production valve has a flow limiting adjustment and a fully open state.

4. A water purification system according to claim 3, characterized in that, A second reflux valve is also installed on the second reflux pipeline. The second reflux valve has the functions of flow limiting regulation and fully open state.

5. A water purification system according to claim 2, characterized in that... It also includes a faucet, the second water production pipeline is connected to the faucet, and the second water production pipeline is equipped with a high-pressure switch but not a water production valve.

6. A water purification system according to claim 3, characterized in that... The first water purification pipeline includes a first main water purification pipeline, a first branch water purification pipeline, and a second branch water purification pipeline. The first main water purification pipeline is equipped with a first check valve and a second three-way valve. The inlet and outlet of the first check valve are respectively connected to the first net outlet and the first inlet of the second three-way valve. The second and third outlets of the second three-way valve are respectively connected to the first branch water purification pipeline and the second branch water purification pipeline. The second branch water purification pipeline is sequentially equipped with a first water purification valve and a third three-way valve. The outlet of the first water purification valve is connected to the first inlet of the third three-way valve, and the outlet of the first branch water purification pipeline is connected to the second inlet. The second return pipeline includes a second front-end return pipeline and a second rear-end return pipeline. The second front-end return pipeline is equipped with a second check valve. The inlet and outlet of the second check valve are respectively connected to the second net outlet and the second inlet of the third three-way valve. The second rear-end pipeline is respectively connected to the third outlet of the third three-way valve and the first inlet of the first three-way valve. The first water purification valve has an open or closed state.

7. A water purification system according to claim 3, characterized in that... The first water purification pipeline includes a first main water purification pipeline, a first branch water purification pipeline, and a second branch water purification pipeline. The first main water purification pipeline is equipped with a first one-way valve and a fourth three-way valve. The inlet and outlet of the first one-way valve are connected to the first water outlet and the first inlet of the fourth three-way valve, respectively. The second and third outlets of the fourth three-way valve are connected to the first and second branch water purification pipelines, respectively. The second branch water purification pipeline is sequentially equipped with a second water purification valve and a fifth three-way valve. The outlet of the second water purification valve is connected to the first inlet of the fifth three-way valve. The outlet of the first branch water purification pipeline is connected to the second inlet. The second water production pipeline includes a second pre-section water production pipeline and a second post-section water production pipeline. The second pre-section water production pipeline is equipped with a second water production valve. The inlet and outlet of the second water production valve are connected to the second water outlet and the second inlet of the fifth three-way valve, respectively. The second post-section water production pipeline is connected to the third outlet of the fifth three-way valve and the inlet of the faucet. A high-pressure switch is installed on the pipeline. The second water purification valve has flow-limiting adjustment and a fully open state.

8. A water purification system according to claim 3, characterized in that... The first concentrate pipeline includes a first main concentrate pipeline, a first branch concentrate pipeline, and a first return pipeline. The first main concentrate pipeline is connected to the first concentrate outlet and the first inlet of the sixth three-way valve, respectively. The first branch concentrate pipeline is equipped with a first concentrate valve, the inlet of which is connected to the second outlet of the sixth three-way valve. The inlet and outlet of the first return pipeline are connected to the third outlet of the sixth three-way valve and the first inlet of the seventh three-way valve, respectively. The pipeline is equipped with a first return valve and a third check valve. The second inlet and third outlet of the seventh three-way valve are connected to the outlet of the first solenoid valve and the inlet of the booster pump on the main inlet pipeline, respectively. The first return valve has a flow-limiting adjustment and a fully open state.

9. A water purification system according to claim 3, characterized in that... It also includes a pre-filter and a post-filter, wherein the pre-filter is installed on the inlet pipe upstream of the first membrane filter and the post-filter is installed on the second product water pipe.

10. A water purification system according to claim 3, characterized in that... It also includes a pre-filter and a post-filter, wherein the pre-filter is installed on the inlet pipe upstream of the first membrane filter and the post-filter is installed on the first purified water pipe.

11. A water purification system according to claim 8, characterized in that... It also includes a pre-filter and a post-filter. The pre-filter is installed on the inlet pipe upstream of the first membrane filter, and the post-filter is installed on the first main water purification pipe, the first branch water purification pipe, or the second branch water purification pipe.

12. A water purification system according to any one of claims 9-11, characterized in that... The pre-filter or post-filter contains mineralized filter media.

13. A water purification system according to any one of claims 1-12, characterized in that... It also includes a detection module, which includes at least a first, a second, and a third detection module, located on the upstream pipeline of the first inlet, the first purified water pipeline or the first main purified water pipeline, and the second product water pipeline or the second downstream product water pipeline, respectively. The removal rate of mineral ions by the first membrane filter can be calculated based on the concentration data of divalent and ionic mineral ions detected by the first and second modules, and the retention rate of mineral ions by the second membrane filter can be calculated based on the concentration data of divalent and ionic mineral ions detected by the second and third modules.

14. A water purification system according to claim 13, characterized in that... The water purifier using this water purification system is equipped with a PLC controller. The detection data of the detection module is stored on the PLC controller. The data processing program set in the PLC controller automatically determines whether adjustment and selection of the execution program code are needed. The PLC controller is equipped with a first module and a second module respectively. The first module includes a detection module, a first judgment module, a calculation unit, and an adjustment unit. The detection module controls the first detection module, the second detection module, and the third detection module to detect the solution in the water circuit. The calculation unit is used to calculate and compare the initial set value of the system with the actual concentrations of monovalent and divalent ions. The first judgment module is used to compare the input information with the preset rules and trigger subsequent operations based on the judgment result. The adjustment unit is used for deviation correction and adjustment. The second module includes a detection module, a first judgment module, a calculation module, and an adjustment module. The detection module controls the first, second, and third detection modules to detect the solution in the water circuit. The calculation module includes a collection unit, a first calculation unit, an acquisition unit, and a second calculation unit. The initial state or adjusted concentration detection data is stored in the collection unit, and the process concentration data during system debugging is stored in the acquisition unit. The calculation module is used to calculate and compare the target set value with the actual concentrations of monovalent and divalent ions. The first judgment module is used to compare the input information with preset rules and trigger subsequent operations based on the judgment result. The adjustment unit is used for deviation correction and adjustment, and includes a first adjustment unit, a second adjustment unit, a collection unit, and an acquisition unit.

15. A water purification system according to claim 13, characterized in that... The method for adjusting the mineral concentration in the effluent of a water purification system includes the following steps: Step 1: Initial state of the equipment: When the faucet is turned on, the high-pressure switch is triggered to transmit an open signal, and the water purification system is in operation: the first solenoid valve is open, the booster pump is turned on, and at least one other solenoid valve is in a flow-limited or fully open state; at this time, the appropriate initial value of the recovery rate of each unit is set according to the target value requirements of the concentration of monovalent and divalent mineral ions; Step 2: Use the first detection module, the second detection module, and the third detection module to detect the concentration of monovalent and divalent ions in the solution in the water pipeline where it is located, and obtain the corresponding first detection data, second detection data, and third detection data; Step 3: Compare the concentrations of monovalent and divalent mineral ions in the third detection data with the target concentration values. The PLC controller will make judgments based on different instantaneous conditions, start the corresponding adjustment program code, and execute adjustment actions. The adjustment actions include adjusting the size of the flow-limiting opening of at least one solenoid valve. Step 4: After adjustment by the PLC controller, when the concentrations of monovalent and divalent mineral ions in the third detection data are consistent with the set concentration values, the controller determines that the system should maintain this state.

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