Water production system and method for producing water

Abstract

The application relates to a water production system and a water production method. The water production system comprises a main pipeline, a first branch pipeline and a second branch pipeline. A first flow control member and a filter assembly are sequentially arranged on the main pipeline. The filter assembly comprises a filter cavity and a membrane filter core. The membrane filter core is arranged in the filter cavity and divides the filter cavity into a raw water cavity and a purified water cavity. A third detection position is arranged in the purified water cavity. The inlet of the first branch pipeline is located between the filter assembly and the outlet of the main pipeline. A second switch valve and a first water collector are sequentially arranged on the first branch pipeline. A first liquid level detection member is arranged in the first water collector. The inlet of the second branch pipeline is located between the filter assembly and the outlet of the main pipeline. A third switch valve and a second water collector are sequentially arranged on the second branch pipeline. A second liquid level detection member is arranged in the second water collector. Low-TDS-value water and high-TDS-value water can be collected by the first water collector and the second water collector respectively, so as to be used in a subsequent water taking process, thereby reducing water resource waste.

Description

Technical Field

[0001] This invention relates to the field of water production system technology, and in particular to a water production system and water production method. Background Technology

[0002] As water purification products become increasingly common in homes, standalone purification functions are no longer sufficient for some users' needs. Currently, many water purification products utilize nanofiltration or reverse osmosis to remove ions from the water. These products produce very low TDS values, generally below 100. This ensures the water is free of harmful substances such as heavy metals and also guarantees that the purified water tastes acceptable to users.

[0003] However, both nanofiltration and reverse osmosis products suffer from ion migration issues after a period of inactivity. This results in a very high TDS (Total Dissolved Solids) level in the produced water system when it is reused, sometimes even exceeding the TDS of tap water. Currently, some products discharge some water behind the membrane before each water intake, wasting water resources. Summary of the Invention

[0004] Therefore, it is necessary to provide a water production system and method to address the above problems and reduce the waste of water resources.

[0005] This invention first provides a water production system, comprising: a main pipeline, the inlet of which is the water inlet of the water production system; a first flow control element and a filter assembly are sequentially arranged on the main pipeline; the filter assembly includes a filter chamber and a membrane filter element, the membrane filter element being disposed within the filter chamber and dividing the filter chamber into a raw water chamber and a purified water chamber; a third detection position is provided in the purified water chamber; a first branch pipeline, the inlet of which is located between the filter assembly and the outlet of the main pipeline; a second switching valve and a first water collector are sequentially arranged on the first branch pipeline; a first liquid level detection element is provided in the first water collector; and a second branch pipeline, the inlet of which is located between the filter assembly and the outlet of the main pipeline; a third switching valve and a second water collector are sequentially arranged on the second branch pipeline; a second liquid level detection element is provided in the second water collector.

[0006] In the aforementioned water production system, high-TDS and low-TDS water can be collected separately in advance. During the water collection process, the water flows in the main pipeline, and the membrane filter plays a role in intercepting minerals. This allows the first water collector to collect low-TDS water that has been filtered by the membrane filter. After the water in the main pipeline has been left to stand for a period of time, the minerals before and after the membrane filter migrate, allowing the second water collector to collect high-TDS water. Thus, low-TDS and high-TDS water can be collected by the first and second water collectors respectively for use in subsequent water intake processes, avoiding the need for users to discharge the high-TDS water after the membrane filter before each water intake, thereby reducing water waste.

[0007] In one embodiment, the water production system further includes a third branch pipeline, the inlet of which is connected to the purified water chamber, and a fourth switch valve and a flow regulating valve are sequentially provided on the third branch pipeline; a second detection position is provided in the raw water chamber.

[0008] With this setup, opening the fourth switch valve and the flow regulating valve allows some water in the purified water chamber to be discharged through the third branch pipe, preventing the TDS value of the water in the purified water chamber from continuously rising. At the same time, the flow regulating valve can be PID controlled according to the TDS value of the second detection position to regulate the flow rate through the third branch pipe.

[0009] In one embodiment, the water production system further includes a first drainage pipe, the inlet and outlet of which are respectively connected to the first water collector and the third branch pipe, and the outlet of the first drainage pipe is located after the fourth switch valve, and a fourth flow control element is provided on the first drainage pipe; and / or, the water production system further includes a second drainage pipe, the inlet and outlet of which are respectively connected to the second water collector and the third branch pipe, and the outlet of the second drainage pipe is located after the fourth switch valve, and a fifth flow control element is provided on the second drainage pipe.

[0010] With this configuration, when the user has not drawn water for a long time or the water production system has not been mixed for a long time, the third and fourth flow control components will be activated to discharge the water in the first and second water collectors through the first drain pipe, the second drain pipe and the third branch pipe, so as to prevent the water in the first and second water collectors from being stored for a long time and breeding bacteria.

[0011] In one embodiment, the water production system further includes a fourth branch pipe and a fifth branch pipe. The inlet of the fourth branch pipe is connected to the first water collector, and the outlet of the fourth branch pipe is the water outlet of the water production system. A second flow control element is provided on the fourth branch pipe. The inlet and outlet of the fifth branch pipe are respectively connected to the second water collector and the fourth branch pipe, and the outlet of the fifth branch pipe is located after the second flow control element. A third flow control element is provided on the fifth branch pipe. A first detection position is also provided on the fourth branch pipe, and the first detection position is located between the outlet of the fifth branch pipe and the water outlet.

[0012] With this setup, the first detection unit is used to detect the TDS value of the mixed water, enabling the water production system to precisely control the second and third flow control components based on the detection result of the first detection unit and the user's preset TDS value for water intake. This ensures that the user receives water with a TDS value that meets expectations from the very first cup, meaning that the mineral content always meets the user's needs.

[0013] In one embodiment, the main pipeline is further provided with a first switching valve, the first switching valve being located between the water inlet and the first flow control element; and / or, the main pipeline is further provided with a first filter element located between the water inlet and the first flow control element; and / or, the main pipeline is further provided with a second filter element located between the filter assembly and the inlet of the first branch pipeline.

[0014] With this configuration, the first switch valve is used to control whether the water at the inlet flows to the first flow control element; the first filter element and the second filter element can improve the filtration effect and ensure water quality safety.

[0015] The present invention also provides a water production method, applied to the above-described water production system, comprising the following steps:

[0016] Preset water collection conditions for the first and second water collectors:

[0017] The first liquid level in the first water collector detected by the first liquid level detection device is acquired in real time, the second liquid level in the second water collector detected by the second liquid level detection device is acquired in real time, and the TDS value T3 at the third detection position is acquired in real time.

[0018] Determine whether both the first liquid level and the second liquid level are higher than the preset maximum liquid level;

[0019] If so, then neither the first nor the second water collector will collect water;

[0020] If not, determine whether T3 is less than or equal to the first preset high TDS value T30;

[0021] If not, the second water collector collects water: close the second switch valve, open the third switch valve, and activate the first flow control device; if yes, determine whether the first liquid level is higher than the preset maximum liquid level.

[0022] If so, then let it stand for a first preset time t1, and repeatedly execute the step described above to determine whether T3 is less than or equal to the first preset high TDS value T30;

[0023] If not, the first water collector collects water: close the third switch valve, open the second switch valve, and activate the first flow control device.

[0024] With this configuration, when T3 > T30, water with high TDS values ​​in the main pipeline flows into the second water collector for collection, preventing water with high TDS values ​​from entering the first water collector. When T3 ≤ T30, if the first water collector is short of water, water with low TDS values ​​flows into the first water collector for collection. If the first water collector is full, the second water collector is short of water and will collect water when T3 > T30. This ensures that both the first and second water collectors have sufficient water for subsequent use and also avoids users having to drain some water after the membrane filter before each water draw, thus reducing water waste.

[0025] In one embodiment, the step of collecting water in the first water collector further includes the following step:

[0026] Close the third switch valve, open the second switch valve, and activate the first flow control device until the first liquid level is higher than the preset maximum liquid level, and repeatedly execute the step of determining whether the first liquid level and the second liquid level are both higher than the preset maximum liquid level.

[0027] With this setup, once the first water collector is full, it is determined whether both the first and second liquid levels are higher than the preset maximum liquid level to determine whether the second water collector is in a water shortage state.

[0028] In one embodiment, the step of collecting water in the second water collector further includes the following step:

[0029] Close the second switch valve, open the third switch valve, and start the first flow control device until T3 is less than or equal to the first preset high TDS value T30, and repeatedly execute the step of determining whether the first liquid level and the second liquid level are both higher than the preset maximum liquid level.

[0030] With this setting, when T3≤T30, it means that the water with high TDS value has been collected. It is necessary to re-determine whether the first liquid level and the second liquid level are both higher than the preset maximum liquid level in order to determine whether the first water collector and the second water collector are in a water shortage state.

[0031] In one embodiment, the water production system further includes a second drainage pipe, on which a fifth flow control element is provided; the step of collecting water in the second water collector further includes the following step:

[0032] If the second liquid level is higher than the preset maximum liquid level, the fifth flow control device is activated, and the second water collector simultaneously collects and drains water until the second liquid level equals the preset maximum liquid level.

[0033] This design prevents water from overflowing from the second water collector.

[0034] In one embodiment, the water production system further includes a third branch pipeline, on which a fourth switching valve and a flow regulating valve are sequentially installed, and a second detection position is provided in the raw water chamber; the step of collecting water in the first water collector further includes the following step:

[0035] Obtain the TDS value T2 at the second detection position;

[0036] Determine whether T2 is less than or equal to the second preset high TDS value T20;

[0037] If so, then close the fourth switching valve and the flow regulating valve;

[0038] If not, open the fourth switching valve and the flow regulating valve, and perform PID control on the flow regulating valve.

[0039] With this setup, when T2 is greater than or equal to T20, the fourth switch valve and flow regulating valve are opened, and the flow regulating valve is controlled by PID according to T2, so that some water in the water purification chamber can be discharged through the third branch pipe, avoiding the continuous rise of the TDS value of the water in the water purification chamber, thereby preventing water with high TDS value from entering the first water collector.

[0040] In one embodiment, the water production system further includes a third branch pipeline, on which a fourth switching valve and a flow regulating valve are sequentially installed; after the second water collector collects water, the system further includes the following step:

[0041] Adjust to flushing mode: Close the second and third switch valves, open the fourth switch valve and flow regulating valve, and activate the first flow control device.

[0042] With this setup, water with high TDS values ​​in the main pipeline can be discharged from the water production system through the third branch pipeline, so that the water in the main pipeline after flushing has low TDS values ​​and can be collected by the first water collector.

[0043] In one embodiment, the water production system further includes a fourth branch pipe and a fifth branch pipe, the fourth branch pipe being provided with a second flow control device, the fifth branch pipe being provided with a third flow control device, and the fourth branch pipe also being provided with a first detection position; the water production method further includes the following steps:

[0044] Obtain the preset TDS value T0 of the water sample;

[0045] Adjust to water intake mode: Adjust the second flow control element to operate at the first preset voltage, and adjust the third flow control element to operate at the second preset voltage;

[0046] Real-time acquisition of the TDS value T1 at the first detection position;

[0047] Determine if T1 is equal to T0;

[0048] If so, then proceed with normal water collection;

[0049] If not, then PID control is applied to the second and / or third flow control components.

[0050] With this setup, when the user adjusts to the water dispensing mode, water is dispensed normally when T1 equals T0; when T1 does not equal T0, the second and third flow control components are PID controlled according to the relationship between T1 and T0, thereby adjusting the flow rate of water discharged from the first and second water collectors to the outlet, so that the mixed water can be maintained at T0, so that the user can always receive water with a TDS value of T0 from the first cup.

[0051] In one embodiment, the step of performing PID control on the second flow control element and / or the third flow control element if the condition is not met further includes the step of:

[0052] When T1 is greater than T0, determine whether the operating voltage of the second current control device has reached the upper limit;

[0053] If yes, then lower the operating voltage of the third current control device and repeatedly execute the step of determining whether T1 is equal to T0; if no, then raise the operating voltage of the second current control device and repeatedly execute the step of determining whether T1 is equal to T0.

[0054] When T1 is less than T0, determine whether the operating voltage of the second current control device has reached the lower limit;

[0055] If yes, then increase the operating voltage of the third current control device and repeatedly execute the step of determining whether T1 equals T0; if no, then decrease the operating voltage of the second current control device and repeatedly execute the step of determining whether T1 equals T0; or,

[0056] When T1 is greater than T0, determine whether the operating voltage of the third current control device has reached the lower limit;

[0057] If yes, then increase the operating voltage of the second current control device and repeatedly execute the step of determining whether T1 is equal to T0; if no, then decrease the operating voltage of the third current control device and repeatedly execute the step of determining whether T1 is equal to T0.

[0058] When T1 is less than T0, determine whether the operating voltage of the third current control device has reached the upper limit;

[0059] If yes, then lower the operating voltage of the second current control device and repeatedly execute the step of determining whether T1 is equal to T0; if no, then raise the operating voltage of the third current control device and repeatedly execute the step of determining whether T1 is equal to T0.

[0060] With this configuration, the mineral content of the water flowing out of the outlet can be reduced by increasing the operating voltage of the second flow control component or decreasing the operating voltage of the third flow control component; conversely, the mineral content of the water flowing out of the outlet can be increased by decreasing the operating voltage of the second flow control component or increasing the operating voltage of the third flow control component.

[0061] In one embodiment, the water production system further includes a first drainage pipe and a second drainage pipe, wherein a fourth flow control element is provided on the first drainage pipe, and a fifth flow control element is provided on the second drainage pipe; the water production method further includes the step of:

[0062] Preset the drainage conditions for the first and second water collectors:

[0063] Calculate the time interval t2 between the last water intake and the current water intake. If t2 is greater than or equal to the second preset time, activate the fourth and fifth flow control devices, and the first and second water collectors will drain water.

[0064] With this setup, when the water production system is not used for a long time, all the water in the first and second water collectors will be drained, preventing the water in the first and second water collectors from being stored for a long time and breeding bacteria. Attached Figure Description

[0065] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0066] Figure 1 This is a diagram of a water production system according to one embodiment of the present invention;

[0067] Figure 2 This is a flowchart of the water production method of the present invention;

[0068] Figure 3 Provided by the present invention Figure 2 A flowchart of another implementation of the water intake mode;

[0069] Figure 4 Provided by the present invention Figure 2 Flowchart of water collection from the first and second water collectors;

[0070] Figure 5 This is a flowchart illustrating the water collection process of the first and second water collectors in the water production method provided by the present invention.

[0071] Figure 6 A flowchart illustrating the water collection process of the first water collector in the water production method provided by this invention.

[0072] Figure 7 A flowchart illustrating the water collection process of the second water collector in the water production method provided by this invention.

[0073] Figure 8 This is a flowchart of the water intake mode in the water production method provided by the present invention;

[0074] Figure 9 Provided by the present invention Figure 8 A flowchart illustrating another implementation of the water intake mode.

[0075] Reference numerals: 10. Main pipeline; 11. First filter element; 12. First switching valve; 13. First flow control element; 14. Filter assembly; 141. Membrane filter element; 142. Filter chamber; 1421. Raw water chamber; 1422. Clean water chamber; 143. Third detection position; 144. Second detection position; 15. Second filter element; 16. First one-way valve; 20. First branch pipeline; 21. Second switching valve; 22. First water collector; 221. First liquid level detection element; 222. First sterilization device; 30. Second branch pipeline; 31. 32. Third switch valve; 32. Second water collector; 321. Second liquid level detection element; 322. Second sterilization device; 40. Third branch pipeline; 41. Fourth switch valve; 42. Second check valve; 43. Flow regulating valve; 50. First drain pipeline; 51. Fourth flow control element; 52. Third check valve; 60. Second drain pipeline; 61. Fifth flow control element; 62. Fourth check valve; 70. Fourth branch pipeline; 71. Second flow control element; 72. First detection position; 73. Fifth check valve; 80. Fifth branch pipeline; 81. Third flow control element. Detailed Implementation

[0076] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0077] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0079] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0080] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0081] As water purification products become increasingly common in homes, standalone purification functions are no longer sufficient for some users' needs. Currently, many water purification products utilize nanofiltration or reverse osmosis to remove ions from the water. These products produce very low TDS values, generally below 100. This ensures the water is free of harmful substances such as heavy metals and also guarantees that the purified water tastes acceptable to users.

[0082] However, both nanofiltration and reverse osmosis products suffer from ion migration issues after a period of inactivity. This results in a very high TDS (Total Dissolved Solids) level in the produced water system when it is reused, sometimes even exceeding the TDS of tap water. Currently, some products discharge some water behind the membrane before each water intake, wasting water resources.

[0083] To solve the above problems, such as Figure 1 As shown, this embodiment of the invention first provides a water production system that can be applied to water purification products, avoiding the need to drain the water behind the membrane before each water intake, thereby reducing water waste. The mineral content in the water, also known as the total dissolved solids (TDS) value, will be referred to as the TDS value below.

[0084] Specifically, such as Figure 1 As shown, the water production system includes a main pipeline 10, a first branch pipeline 20, and a second branch pipeline 30. The inlet of the main pipeline 10 is the water inlet of the water production system. A first flow control element 13 and a filter assembly 14 are sequentially installed on the main pipeline 10. The filter assembly 14 includes a filter chamber 142 and a membrane filter element 141. The membrane filter element 141 is disposed within the filter chamber 142, dividing the filter chamber 142 into a raw water chamber 1421 and a purified water chamber 1422. A third detection position 1 is provided within the purified water chamber 1422. 43; The inlet of the first branch pipe 20 is located between the filter assembly 14 and the outlet of the main pipe 10. The first branch pipe 20 is provided with a second switch valve 21 and a first water collector 22 in sequence. The first water collector 22 is provided with a first liquid level detection element 221. The inlet of the second branch pipe 30 is located between the filter assembly 14 and the outlet of the main pipe 10. The second branch pipe 30 is provided with a third switch valve 31 and a second water collector 32 in sequence. The second water collector 32 is provided with a second liquid level detection element 321.

[0085] In the water production system provided in this embodiment of the invention, the inlet end of the main pipeline 10 can be connected to the raw water source; the first flow control element 13 is used to adjust the water supply flow of the main pipeline 10, that is, it can adjust the flow of water passing through the filter assembly 14; the membrane filter element 141 is used to filter out impurities such as tiny particles, colloids, bacteria and algae in the water, and can also filter out some minerals; the third detection position 143 is used to detect the TDS value of the water after being filtered by the membrane filter element 141. In the first branch pipeline 20, the first water collector 22 is used to collect water with low TDS value from the main pipeline 10 after being filtered by the membrane filter element 141, the second switch valve 21 is used to control whether the water in the main pipeline 10 flows to the first water collector 22, and the first liquid level detection element 221 is used to detect the liquid level in the first water collector 22 and the second water collector 32. In the second branch pipe 30, the second water collector 32 is used to collect water with a high TDS value from the main pipe 10 after it has settled. The third switch valve 31 is used to control whether the water in the main pipe 10 flows to the second water collector 32. The second liquid level detector 321 is used to detect the liquid level in the second water collector 32. By controlling the opening and closing of the second switch valve 21 and the third switch valve 31, the direction of water flow in the main pipe 10 can be controlled. When the third switch valve 31 is closed and the second switch valve 21 is open, the water in the main pipe 10 will not enter the second branch pipe 30, and the water flows through the first branch pipe 20 into the first water collector 22. When the second switch valve 21 is closed and the third switch valve 31 is open, the water in the main pipe 10 will not enter the first branch pipe 20, and the water flows through the second branch pipe 30 into the second water collector 32.

[0086] The third detection point 143 can be tested using a TDS meter. For ease of description, the TDS value of the user-preset water intake is set as T0, and the TDS value detected by the TDS meter using the third detection point 143 is set as T3. Furthermore, to ensure that the second water collector 32 can collect a sufficient amount of water with high TDS values, the volume of the water purification chamber 1422 is preferably designed to be relatively large.

[0087] Due to the characteristics of membrane filter element 141, the mineral content of the water before and after membrane filter element 141 differs during water flow within the main pipeline 10, resulting in different TDS values. Specifically, the TDS value before membrane filter element 141 is greater than the TDS value after membrane filter element 141. Generally, the mineral throttling rate of membrane filter element 141 is between 80% and 95%. Taking 80% as an example, the TDS value after membrane filter element 141 is 1 / 5 of the TDS value before membrane filter element 141. Furthermore, during filtration, the TDS value of the water after membrane filter element 141 is generally less than T0, meaning the water after membrane filter element 141 is low-TDS water. However, when the water in the main pipeline 10 is not flowing, i.e., in a static state, minerals before and after membrane filter element 141 migrate, ultimately causing the TDS values ​​before and after membrane filter element 141 to be the same, meaning both the water before and after membrane filter element 141 is high-TDS water.

[0088] This water production system can pre-collect high-TDS and low-TDS water separately. During the water collection process, water flows in the main pipeline 10, and the membrane filter 141 intercepts minerals, allowing the first water collector 22 to collect low-TDS water filtered by the membrane filter 141. After the water in the main pipeline 10 has been left to stand for a period of time, minerals before and after the membrane filter 141 migrate, allowing the second water collector 32 to collect high-TDS water. For ease of description, the first water collector 22 is configured to collect water with a first preset high TDS value T30, and the second water collector 32 is configured to collect water with a TDS value higher than the first preset high TDS value T30. The value of T30 can be set according to actual needs. Therefore, both the low TDS water after filtration through membrane filter 141 and the high TDS water after standing for a period of time can be collected by the first water collector 22 or the second water collector 32 for use in subsequent water intake processes. This avoids users having to drain the high TDS water after membrane filter 141 before each water intake, thus reducing water waste.

[0089] The water production system has preset maximum and minimum liquid levels. When the liquid level in the first water collector 22 and the second water collector 32 reaches the preset maximum liquid level, it ensures that there is sufficient water in the first water collector 22 and the second water collector 32 for subsequent use; when the liquid level in the first water collector 22 and the second water collector 32 reaches the preset minimum liquid level, it indicates that there is no water in the first water collector 22 and the second water collector 32.

[0090] In order to better set the water collection mode of the first water collector 22 and the second water collector 32, in this application, the first liquid level detection element 221 detects the first liquid level in the first water collector 22, and the second liquid level detection element 321 detects the second liquid level in the second water collector 32. When both the first liquid level and the second liquid level are higher than the preset maximum liquid level, it means that both the first water collector 22 and the second water collector 32 are in a full water state, and neither the first water collector 22 nor the second water collector 32 collects water.

[0091] When at least one of the first liquid level or the second liquid level is lower than the preset maximum liquid level, it indicates that at least one of the first water collector 22 and the second water collector 32 is in a water shortage state. First, determine the relationship between T3 and the first preset high TDS value T30. When T3 > T30, close the second switch valve 21, open the third switch valve 31, and activate the first flow control device 13 so that the high TDS value water that has been standing in the main pipeline 10 flows into the second water collector 32 for collection, preventing the high TDS value water from entering the first water collector 22. After the high TDS value water is collected, determine again whether the first liquid level and the second liquid level are both higher than the preset maximum liquid level.

[0092] When T3≤T30, it is determined whether the first liquid level is higher than the preset maximum liquid level. If the first liquid level is lower than the preset maximum liquid level, it indicates that the first water collector 22 is in a water shortage state. At this time, the third switch valve 31 is closed, the second switch valve 21 is opened, and the first flow control element 13 is activated, so that the low TDS water filtered by the membrane filter element 141 flows into the first water collector 22 for collection. When the first water collector 22 is full of water, it is determined again whether the first liquid level and the second liquid level are both higher than the preset maximum liquid level.

[0093] If the first liquid level is higher than the preset maximum liquid level, it indicates that the first water collector 22 is full, while the second water collector 32 is short of water. At this time, it is left to stand for a first preset time t1, allowing the minerals before and after the membrane filter element 141 to migrate. The relationship between T3 and T30 is determined again until T3 > T30. Then, the second switch valve 21 is closed, the third switch valve 31 is opened, and the first flow control device 13 is activated, allowing the high TDS water that has been left to stand in the main pipeline 10 to flow into the second water collector 32 for collection. This continues until both the first water collector 22 and the second water collector 32 are full, thus ensuring that both have sufficient water for subsequent use.

[0094] like Figure 1 As shown, the main pipeline 10 may further include a first filter element 11 and a second filter element 15 located before and after the membrane filter element 141. The first filter element 11 performs preliminary filtration on the water entering from the inlet to remove some impurities. The second filter element 15 may be a filter element with heavy metal removal function, such as a KDF filter element, an NSP membrane chromatography filter element, or an activated carbon filter element with heavy metal adsorption capacity. Preferably, the second filter element 15 is an activated carbon filter element with heavy metal adsorption capacity, which also helps to improve the taste of the water while adsorbing heavy metals.

[0095] like Figure 1 As shown, a first switching valve 12 is also provided on the main pipeline 10, and the first switching valve 12 is located between the first filter element 11 and the first flow control element 13. When the first filter element 11 is not provided, the first switching valve 12 is located between the water inlet end and the first flow control element 13. The first switching valve 12 is used to control the opening and closing of the main pipeline 10, that is, to control whether the water at the water inlet end flows to the first flow control element 13.

[0096] like Figure 1 As shown, in order to prevent the high TDS value water in the second water collector 32 from flowing back into the main pipe 10 or the first branch pipe 20, a first check valve 16 is also provided on the main pipe 10 after the inlet of the second branch pipe 30 is located at the inlet of the first branch pipe 20. The first check valve 16 is located between the inlet of the first branch pipe 20 and the inlet of the second branch pipe 30.

[0097] In the illustrated embodiment, both the first water collector 22 and the second water collector 32 are configured as water tanks. Both the first liquid level detection element 221 and the second liquid level detection element 321 are contact-type liquid level sensors, such as low-level and high-level sensors spaced apart along the depth direction of the first water collector 22 or the second water collector 32. When the liquid level in the first water collector 22 or the second water collector 32 reaches a preset minimum liquid level, the low-level sensor is triggered, while the high-level sensor is not triggered; when the liquid level in the first water collector 22 or the second water collector 32 reaches a preset maximum liquid level, both the low-level and high-level sensors are triggered.

[0098] Of course, in other embodiments, the first water collector 22 and the second water collector 32 can also be configured as pressure tanks or other water collection structures. The first liquid level detection element 221 and the second liquid level detection element 321 can also be configured as non-contact liquid level sensors such as ultrasonic liquid level sensors and photoelectric liquid level sensors, as long as they can detect the liquid level in the first water collector 22 and the second water collector 32. This embodiment of the invention does not impose specific limitations here.

[0099] like Figure 1 As shown, during the continuous water collection process of the first water collector 22, the TDS value of the water in the raw water chamber 1421 gradually increases. To prevent the TDS value of the water in the purified water chamber 1422 from rising synchronously and causing high-TDS water to enter the first water collector 22, the water production system also includes a third branch pipe 40. The inlet of the third branch pipe 40 is connected to the purified water chamber 1422, and a fourth switch valve 41 and a flow regulating valve 43 are sequentially installed on the third branch pipe 40. A second detection position 144 is provided in the raw water chamber 1421. The second detection position 144 can be tested by a TDS tester. For ease of description, the TDS value detected by the TDS tester at the second detection position 144 is designated as T2. When the second detection position 144 detects that the TDS value T2 of the water in the raw water chamber 1421 rises to the second preset high TDS value, the fourth switch valve 41 and the flow regulating valve 43 are opened, allowing some water in the purified water chamber 1422 to be discharged through the third branch pipe 40, preventing the TDS value of the water in the purified water chamber 1422 from continuously rising; at the same time, the flow regulating valve 43 can be PID controlled according to T2 to regulate the flow rate through the third branch pipe 40. The value of T20 can be set according to actual needs, as long as the TDS value of the water in the first water collector 22 does not exceed T30.

[0100] like Figure 1 As shown, a second check valve 42 is also provided on the third branch pipe 40. The second check valve 42 is located between the flow regulating valve 43 and the outlet of the third branch pipe 40. The direction of the second check valve 42 is from the flow direction from the membrane filter element 141 toward the third branch pipe 40, so as to prevent the water in the third branch pipe 40 from flowing into the main pipe 10.

[0101] like Figure 1 As shown, the water production system also includes a first drain pipe 50. The inlet and outlet of the first drain pipe 50 are connected to the first water collector 22 and the third branch pipe 40, respectively. The outlet of the first drain pipe 50 is located after the fourth switch valve 41. A fourth flow control element 51 is provided on the first drain pipe 50. A third check valve 52 is also provided on the first drain pipe 50, located between the fourth flow control element 51 and the outlet of the first drain pipe 50. The direction of the third check valve 52 is from the first water collector 22 towards the third branch pipe 40, to prevent water from the third branch pipe 40 from flowing into the first water collector 22. To prevent the water in the first water collector 22 from being stored for a long time and breeding bacteria, when the user has not taken water for a long time or the water production system has not been mixed for a long time, the fourth flow control element 51 is activated to discharge the water in the first water collector 22 through the first drain pipe 50 and the third branch pipe 40.

[0102] Similarly, the water production system also includes a second drain pipe 60. The inlet and outlet of the second drain pipe 60 are connected to the second water collector 32 and the third branch pipe 40, respectively, and the outlet of the second drain pipe 60 is located after the fourth switch valve 41. A fifth flow control element 61 is provided on the second drain pipe 60. A fourth check valve 62 is also provided on the second drain pipe 60, located between the fifth flow control element 61 and the outlet of the second drain pipe 60. The direction of the fourth check valve 62 is from the second water collector 32 towards the third branch pipe 40, to prevent water from the third branch pipe 40 from flowing into the second water collector 32. To prevent the water in the second water collector 32 from being stored for a long time and breeding bacteria, when the user has not taken water for a long time or the water production system has not been mixed for a long time, the fifth flow control element 61 is activated to discharge the water in the second water collector 32 through the second drain pipe 60 and the third branch pipe 40.

[0103] To better configure the drainage methods of the first water collector 22 and the second water collector 32, this application sets the time interval between the last water intake and the current water intake of the water production system as t2. If t2 is greater than or equal to a second preset time, the fourth flow control device 51 and the fifth flow control device 61 are activated, and the water in the first water collector 22 and the second water collector 32 is discharged through the first drainage pipe 50 and the second drainage pipe 60 until the liquid level equals the preset minimum liquid level, that is, when all the water in the first water collector 22 and the second water collector 32 is discharged, the fourth flow control device 51 and the fifth flow control device are closed. At the same time, the fourth switch valve 41 and the flow regulating valve 43 can also be opened to discharge the water in the main pipeline 10 through the third branch pipeline 40. The setting of the second preset time can be based on environmental conditions and the rate of bacterial growth, such as 12 hours, 24 hours, 48 ​​hours or longer.

[0104] like Figure 1 As shown, in order to sterilize or inhibit the bacteria in the water collected in the first water collector 22 and the second water collector 32, a first sterilization device 222 is provided in the first water collector 22, and a second sterilization device 322 is provided in the second water collector 32. Specifically, both the first sterilization device 222 and the second sterilization device 322 can be ultraviolet sterilization devices (UV sterilization devices).

[0105] like Figure 1 As shown, the water production system also includes a fourth branch pipe 70 and a fifth branch pipe 80. The inlet of the fourth branch pipe 70 is connected to the first water collector 22, and the outlet of the fourth branch pipe 70 is the outlet of the water production system. A second flow control element 71 is provided on the fourth branch pipe 70. The inlet and outlet of the fifth branch pipe 80 are connected to the second water collector 32 and the fourth branch pipe 70, respectively, and the outlet of the fifth branch pipe 80 is located after the second flow control element 71. A third flow control element 81 is provided on the fifth branch pipe 80. A first detection position 72 is also provided on the fourth branch pipe 70, located between the outlet of the fifth branch pipe 80 and the outlet. The second flow control element 71 is used to control the flow rate of water discharged from the first water collector 22 into the main pipe 10, the third flow control element 81 is used to control the flow rate of water discharged from the second water collector 32 into the main pipe 10, and the first detection position 72 is used to detect the TDS value of the mixed water.

[0106] The first detection unit 72 can be tested by a TDS tester. For ease of description, the TDS value of the user-preset water sample is set as T0, and the TDS value detected by the first detection unit 72 by the TDS tester is set as T1.

[0107] During the water intake process, the user sets the TDS value T0 of the water to be taken, adjusts to the water intake mode, and activates the second flow control component 71 to operate at the first preset voltage (e.g., half of the maximum operating voltage), and the third flow control component 81 to operate at the second preset voltage (e.g., half of the maximum operating voltage), so that the water with a low TDS value in the first water collector 22 mixes with the water with a high TDS value in the second water collector 32. The relationship between T1 and T0 of the first detection position 72 is detected. When T1 = T0, the TDS value of the water flowing out from the outlet is T0, which meets the user's needs. The voltages of the second flow control component 71 and the third flow control component 81 are stabilized at the current voltage, and the current operating voltage of the second flow control component 71 is used as the first preset voltage of the second flow control component 71 for the next water intake, and the current operating voltage of the third flow control component 81 is used as the second preset voltage of the third flow control component 81 for the next water intake.

[0108] When T1 < T0, the mineral content in the water needs to be increased. At this time, it is determined whether the working voltage of the second flow control device 71 has reached the lower limit. If the working voltage of the second flow control device 71 has not reached the lower limit, the working voltage of the second flow control device 71 is lowered to reduce the flow rate from the first water collector 22 to the outlet, thereby increasing the mineral content of the water flowing out from the outlet. After lowering, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0. If the working voltage of the second flow control device 71 has reached the lower limit, the working voltage of the third flow control device 81 is increased to increase the flow rate from the second water collector 32 to the outlet, thereby increasing the mineral content of the water flowing out from the outlet. After increasing, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0.

[0109] Alternatively, it can be determined whether the operating voltage of the third flow control device 81 has reached its upper limit. If the operating voltage of the third flow control device 81 has not reached its upper limit, the operating voltage of the third flow control device 81 is increased to increase the flow rate from the second water collector 32 to the water outlet, thereby increasing the mineral content of the water flowing out from the water outlet. After the increase, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0. If the operating voltage of the third flow control device 81 has reached its upper limit, the operating voltage of the second flow control device 71 is decreased to reduce the flow rate from the first water collector 22 to the water outlet, thereby increasing the mineral content of the water flowing out from the water outlet. After the increase, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0.

[0110] When T1 > T0, the mineral content in the water needs to be reduced. At this time, it is determined whether the working voltage of the second flow control device 71 has reached the upper limit. If the working voltage of the second flow control device 71 has not reached the upper limit, the working voltage of the second flow control device 71 is increased to increase the flow rate from the first water collector 22 to the outlet, thereby reducing the mineral content of the water flowing out from the outlet. After the increase, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0. If the working voltage of the second flow control device 71 has reached the upper limit, the working voltage of the third flow control device 81 is decreased to reduce the flow rate from the second water collector 32 to the outlet, thereby reducing the mineral content of the water flowing out from the outlet. After the decrease, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0.

[0111] Alternatively, it can be determined whether the operating voltage of the third flow control device 81 has reached the lower limit. If the operating voltage of the third flow control device 81 has not reached the lower limit, the operating voltage of the third flow control device 81 is lowered to reduce the flow rate from the second water collector 32 to the outlet, thereby reducing the mineral content of the water flowing out from the outlet. After lowering, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0. If the operating voltage of the third flow control device 81 has reached the lower limit, the operating voltage of the second flow control device 71 is raised to increase the flow rate from the first water collector 22 to the outlet, thereby reducing the mineral content of the water flowing out from the outlet. After lowering, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0.

[0112] This allows for precise control of the second flow control element 71 and the third flow control element 81 based on the detection result T1 of the first detection unit 72 and the user-preset TDS value T0 for water intake. The second and third flow control elements 71 and 81 respectively adjust the flow rates from the first water collector 22 to the outlet and from the second water collector 32 to the outlet, thereby achieving precise TDS value adjustment. This ensures that the user receives water with a TDS value equal to T0 from the very first cup, meaning the TDS value of the water will neither be greater than nor less than T0, and the mineral content will always meet the user's needs. Furthermore, PID control of the second and third flow control elements 71 and 81 can produce water with different TDS values, thus meeting the needs of different user groups and regions. It also avoids excessive mineral content that could affect the taste of the water or cause bacterial growth, while preventing the precipitation of heavy metal ions and other harmful substances, thus ensuring the safety of the purified water.

[0113] It's worth mentioning that "first cup of water" here refers to water taken when there's a significant time gap between the user's last water draw and this draw. This "significant time gap" can be set to 1 hour, 2 hours, 3 hours, or even longer.

[0114] like Figure 1 As shown, in order to prevent the high TDS value water flowing from the second water collector 32 to the outlet from flowing back into the first water collector 22, a fifth check valve 73 is also provided on the fourth branch pipe 70. The fifth check valve 73 is located between the second flow control element 71 and the outlet of the fifth branch pipe 80.

[0115] In this application, the first flow control element 13, the second flow control element 71, the third flow control element 81, the fourth flow control element 51, and the fifth flow control element 61 can all be booster pumps or water pumps; the first switching valve 12, the second switching valve 21, the third switching valve 31, and the fourth switching valve 41 are all solenoid valves or electrically controlled regulating valves; the flow regulating valve 43 can be an electrically controlled regulating valve. Furthermore, the aforementioned flow control elements and switching valves can all be automatically controlled by an electronic control system. The TDS values ​​obtained at the first detection position 72, the second detection position 144, and the third detection position 143 can all be obtained by the electronic control system, which then controls the solenoid valves or the flow control elements based on the obtained TDS values.

[0116] like Figure 2 , Figure 4 and Figure 5 As shown, this embodiment of the invention also provides a water production method applied to a water production system, comprising the following steps:

[0117] S30000. Preset water collection conditions for the first water collector 22 and the second water collector 32:

[0118] S31000. Real-time acquisition of the first liquid level in the first water collector 22 detected by the first liquid level detection element 221, real-time acquisition of the second liquid level in the second water collector 32 detected by the second liquid level detection element 321, and real-time acquisition of the TDS value T3 at the third detection position 143.

[0119] S32000. Determine whether both the first liquid level and the second liquid level are higher than the preset maximum liquid level;

[0120] S32100. If so, then neither the first water collector 22 nor the second water collector 32 will collect water;

[0121] S32200. If not, determine whether T3 is less than or equal to the first preset high TDS value T30;

[0122] S32210. If not, the second water collector 32 collects water: close the second switch valve 21, open the third switch valve 31, and start the first flow control element 13;

[0123] S32220. If yes, determine whether the first liquid level is higher than the preset maximum liquid level;

[0124] S32221. If so, then let it stand for the first preset time t1 and repeat step S32200.

[0125] S32222. If not, the first water collector 22 collects water: closes the third switch valve 31, opens the second switch valve 21, and starts the first flow control element 13.

[0126] In step S31000, the TDS value T3 of the third detection position 143 is obtained. This value T3 changes in real time during the actual process, and it can be measured in real time by a TDS meter at this position. It is understood that this value can be obtained in real time in the system applied to this water production method. Furthermore, since the first and second liquid levels also change in real time, they can be obtained in real time through the first liquid level detection element 221 and the second liquid level detection element 321.

[0127] In step S32000, when both the first liquid level and the second liquid level are higher than the preset maximum liquid level, the process proceeds to step S32100. At this time, both the first water collector 22 and the second water collector 32 are full of water, and neither of them collects water. When at least one of the first liquid level or the second liquid level is lower than the preset maximum liquid level, it indicates that at least one of the first water collector 22 and the second water collector 32 is short of water, and the process proceeds to step S32200.

[0128] In step S32200, the relationship between T3 and the first preset high TDS value T30 is first determined. When T3 > T30, the process proceeds to step S32210, where the second switch valve 21 is closed, the third switch valve 31 is opened, and the first flow control device 13 is activated, allowing the high TDS water in the main pipeline 10 to flow into the second water collector 32 for collection, preventing the high TDS water from entering the first water collector 22. When T3 ≤ T30, the process proceeds to step S32220, where it is determined whether the first liquid level is higher than the preset maximum liquid level. If the first liquid level is lower than the preset maximum liquid level, it indicates that the first water collector 22 is in a water shortage state. At this time, the third switch valve 31 is closed, the second switch valve 21 is opened, and the first flow control device 13 is activated, allowing the low TDS water filtered by the membrane filter element 141 to flow into the first water collector 22 for collection.

[0129] In step S32000, if the first liquid level is higher than the preset maximum liquid level, the process proceeds to step S32200. At this time, the first water collector 22 is full of water, while the second water collector 32 is short of water. The process is allowed to stand for a first preset time t1, allowing minerals before and after the membrane filter element 141 to migrate. The process then proceeds to step S32000 again to re-determine the relationship between T3 and T30 until T3 > T30, at which point the second water collector 32 collects water. This continues until both the first and second water collectors 22 are full of water, ensuring sufficient water for subsequent use and preventing users from draining some water after the membrane filter element 141 before each water draw, thus reducing water waste.

[0130] like Figure 6 As shown, in step S32222, the water collection of the first water collector 22 further includes the following steps:

[0131] Close the third switch valve 31, open the second switch valve 21, and start the first flow control device 13 until the first liquid level is higher than the preset maximum liquid level, and repeat step S32000.

[0132] In step S32222, after the first water collector 22 is full, it is determined again whether the first liquid level and the second liquid level are both higher than the preset maximum liquid level to determine whether the second water collector 32 is in a water shortage state. When at least one of the first liquid level or the second liquid level is still lower than the preset maximum liquid level, it indicates that the second water collector 32 is in a water shortage state. At this time, the relationship between T3 and the first preset high TDS value T30 is determined. When T3 ≥ T30, step S32210 is entered, and the second water collector 32 collects water. When T3 < T30, the water is left to stand for a first preset time t1 to allow the minerals before and after the membrane filter element 141 to migrate, and the relationship between T3 and the first preset high TDS value T30 is determined again until T3 ≥ T30, at which point the second water collector 32 collects water.

[0133] like Figure 6 As shown, in step S32222, the water collection of the first water collector 22 further includes the following steps:

[0134] Obtain the TDS value T2 at the second detection bit 144;

[0135] Determine whether T2 is less than or equal to the second preset high TDS value T20;

[0136] If so, then close the fourth switching valve 41 and the flow regulating valve 43;

[0137] If not, then open the fourth switching valve 41 and the flow regulating valve 43, and perform PID control on the flow regulating valve 43.

[0138] In step S32222, when the second detection position 144 detects that the TDS value T2 of the water in the raw water chamber 1421 rises to the second preset high TDS value T20, the fourth switch valve 41 and the flow regulating valve 43 are opened, and the flow regulating valve 43 is PID controlled according to T2, so that some of the water in the purified water chamber 1422 can be discharged through the third branch pipe 40, avoiding the continuous rise of the TDS value of the water in the purified water chamber 1422, thereby preventing water with high TDS value from entering the first water collector 22.

[0139] Specifically, the TDS value T2 of the second detection bit 144 is obtained. This value T2 changes in real time during the actual process, and it can be measured in real time by a TDS meter at this location. It is understood that this value can be obtained in real time in the system applied to this water production method.

[0140] like Figure 7As shown, in step S32210, the second water collector 32 further includes the following steps for collecting water:

[0141] Close the second switch valve 21, open the third switch valve 31, and start the first flow control device 13 until T3 is less than or equal to the first preset high TDS value T30, and repeatedly execute the step of determining whether the first liquid level and the second liquid level are both higher than the preset maximum liquid level.

[0142] If the second liquid level is higher than the preset maximum liquid level, the fifth flow control device 61 is activated, and the second water collector 32 simultaneously collects and drains water until the second liquid level equals the preset maximum liquid level.

[0143] In step S32210, when T3 ≤ T30, it indicates that the water with high TDS value has been collected. The system then checks whether both the first and second liquid levels are higher than the preset maximum liquid level to determine if the first water collector 22 and the second water collector 32 are in a water shortage state. When at least one of the first or second liquid levels is lower than the preset maximum liquid level, the system checks whether the first liquid level is lower than the preset maximum liquid level. If the first liquid level is lower than the preset maximum liquid level, it indicates that the first water collector 22 is in a water shortage state, and the first water collector 22 collects water. If the first liquid level is higher than the preset maximum liquid level, it indicates that the first water collector 22 is full, and the second water collector 32 is in a water shortage state. Since T3 ≤ T30, the system needs to stand for a first preset time t1 to allow minerals before and after the membrane filter element 141 to migrate. The system then checks the relationship between T3 and the first preset high TDS value T30 again until T3 > T30, at which point the second water collector 32 collects water.

[0144] When T3 > T30, in order for the first water collector 22 to collect water with low TDS values, all water with high TDS values ​​needs to be discharged into the second water collector 32. Therefore, when the second liquid level is higher than the preset maximum liquid level, in order to prevent the water in the second water collector 32 from overflowing, the fifth flow control device 61 is activated, so that the second water collector 32 needs to collect water and drain water at the same time.

[0145] like Figure 7 As shown, after water is collected in the second water collector 32, since the water in the main pipeline 10 is all high TDS value water, in order to prevent high TDS value water from flowing into the first water collector 22, the water production method further includes the following steps:

[0146] S40000. Adjust to flushing mode: Close the second switch valve 21 and the third switch valve 31, open the fourth switch valve 41 and the flow regulating valve 43, and start the first flow control element 13.

[0147] In step S40000, the water with a high TDS value in the main pipeline 10 can be discharged from the water production system through the third branch pipeline 40, so that the water in the main pipeline 10 after flushing is water with a low TDS value, which can be collected by the first water collector 22.

[0148] like Figures 7 to 8 As shown, the water production method also includes the following steps:

[0149] S10000. Obtain the preset TDS value T0 of the water sample;

[0150] S50000. Adjust to water intake mode: Adjust the second flow control element 71 to the first preset voltage to operate, and adjust the third flow control element 81 to the second preset voltage to operate;

[0151] S60000. Real-time acquisition of the TDS value T1 at the first detection bit 72;

[0152] S70000. Determine if T1 is equal to T0;

[0153] S71000. If so, then proceed with normal water intake;

[0154] S72000. If not, then PID control is applied to the second flow control element 71 and the third flow control element 81.

[0155] In step S10000, the TDS value T0 of the water to be extracted, set by the user, is obtained. T0 can be set according to each user's needs; for example, a higher T0 can be set for elderly people or children than for younger people. This water production method can generate water with a corresponding TDS value of T0 based on the T0 set by the user.

[0156] When the user switches to the water intake mode, the water production system executes step S50000.

[0157] In step S60000, the TDS value T1 of the first detection bit 72 is obtained. This value T1 changes in real time during the actual process, and the T1 value at this location can be measured in real time by a TDS meter. It can be understood that this value can be obtained in real time in the system applied to this water production method.

[0158] In step S70000, it is determined whether T1 equals T0. When T1 equals T0, the second flow control element 71 operates at the first preset voltage, and the third flow control element 81 operates at the second preset voltage. At this time, the TDS value of the water flowing from the outlet is equal to T0. When T1 does not equal T0, PID control is performed on the second flow control element 71 and the third flow control element 81 according to the relationship between T1 and T0 to adjust the voltage of the second flow control element 71 and the third flow control element 81 in real time, thereby adjusting the flow rate of water discharged from the first water collector 22 to the outlet and the flow rate of water discharged from the second water collector 32 to the outlet, so that the mixed water can be maintained at T0, so that the user can always receive water with a TDS value of T0 from the first cup, meeting the user's needs. Of course, PID control can also be performed only on the second flow control element 71 or only on the third flow control element 81.

[0159] The first water collector 22 and the second water collector 32 can determine whether the water collection conditions are met after each water intake or before each water intake. That is, step S30000 can be executed before step S50000 or after step S70000. Of course, the water collection conditions can also be determined during the water intake process or during the static process to ensure that there is sufficient water in the first water collector 22 and the second water collector 32 to mix with the water in the main pipeline 10 each time water is taken. When both the first water collector 22 and the second water collector 32 are full of water, step S30000 can be omitted.

[0160] like Figure 2 and Figure 8 As shown, in one embodiment, in step S72000, the second flow control element 71 can be PID controlled first, and then the third flow control element 81 can be PID controlled. Specifically, when T1 is not equal to T0, T1 can be greater than T0 or less than T0. Therefore, step S72000 also includes the following step:

[0161] S72100. When T1 is greater than T0, determine whether the operating voltage of the second current control device 71 has reached the upper limit;

[0162] If so, then lower the operating voltage of the third current control device 81 and repeatedly execute step S70000;

[0163] If not, the operating voltage of the second current control device 71 is increased, and step S70000 is executed repeatedly.

[0164] S72200. When T1 is less than T0, determine whether the operating voltage of the second current control device 71 has reached the lower limit;

[0165] If so, the operating voltage of the third current control device 81 is increased, and step S70000 is executed repeatedly.

[0166] If not, the operating voltage of the second current control device 71 is reduced, and step S70000 is executed repeatedly.

[0167] In step S72100, it is necessary to reduce the mineral content in the water. At this time, it is determined whether the working voltage of the second flow control device 71 has reached the upper limit. If the working voltage of the second flow control device 71 has not reached the upper limit, the working voltage of the second flow control device 71 is increased to increase the flow rate from the first water collector 22 to the outlet, thereby reducing the mineral content of the water flowing out from the outlet. After the increase, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0. If the working voltage of the second flow control device 71 has reached the upper limit, the working voltage of the third flow control device 81 is decreased to reduce the flow rate from the second water collector 32 to the outlet, thereby reducing the mineral content of the water flowing out from the outlet. After the decrease, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0.

[0168] In step S72200, it is necessary to increase the mineral content in the water. At this time, it is determined whether the working voltage of the second flow control device 71 has reached the lower limit. If the working voltage of the second flow control device 71 has not reached the lower limit, the working voltage of the second flow control device 71 is lowered to reduce the flow rate from the first water collector 22 to the outlet, thereby increasing the mineral content of the water flowing out from the outlet. After lowering, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0. If the working voltage of the second flow control device 71 has reached the lower limit, the working voltage of the third flow control device 81 is increased to increase the flow rate from the second water collector 32 to the outlet, thereby increasing the mineral content of the water flowing out from the outlet. After increasing, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0.

[0169] like Figure 3 and Figure 9 As shown, in another embodiment, in step S72000, the third flow control element 81 can be PID controlled first, and then the second flow control element 71 can be PID controlled. Specifically, when T1 is not equal to T0, T1 can be greater than T0 or less than T0. Therefore, step S72000 also includes the following step:

[0170] S72300. When T1 is greater than T0, determine whether the operating voltage of the third current control device 81 has reached the lower limit;

[0171] If so, the operating voltage of the second current control device 71 is increased, and step S70000 is executed repeatedly.

[0172] If not, then lower the operating voltage of the third current control device 81 and repeat step S70000.

[0173] S72400. When T1 is less than T0, determine whether the operating voltage of the third current control device 81 has reached the upper limit;

[0174] If so, then lower the operating voltage of the second current control device 71 and repeatedly execute step S70000;

[0175] If not, the operating voltage of the third current control device 81 is increased, and step S70000 is executed repeatedly.

[0176] In step S72300, it is necessary to reduce the mineral content in the water. At this time, it is determined whether the working voltage of the third flow control device 81 has reached the lower limit. If the working voltage of the third flow control device 81 has not reached the lower limit, the working voltage of the third flow control device 81 is lowered to reduce the flow rate from the second water collector 32 to the outlet, thereby reducing the mineral content of the water flowing out from the outlet. After the adjustment, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0. If the working voltage of the third flow control device 81 has reached the lower limit, the working voltage of the second flow control device 71 is increased to increase the flow rate from the first water collector 22 to the outlet, thereby reducing the mineral content of the water flowing out from the outlet. After the adjustment, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0.

[0177] In step S72400, it is necessary to increase the mineral content in the water. At this time, it is determined whether the working voltage of the third flow control device 81 has reached the upper limit. If the working voltage of the third flow control device 81 has not reached the upper limit, the working voltage of the third flow control device 81 is increased to increase the flow rate from the second water collector 32 to the outlet, thereby increasing the mineral content of the water flowing out from the outlet. After the increase, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0. If the working voltage of the third flow control device 81 has reached the upper limit, the working voltage of the second flow control device 71 is decreased to reduce the flow rate from the first water collector 22 to the outlet, thereby increasing the mineral content of the water flowing out from the outlet. After the increase, the relationship between T1 and T0 of the first detection position 72 is checked again until T1 = T0.

[0178] like Figure 2 As shown, the water production method also includes the following steps:

[0179] S20000. Preset the drainage conditions for the first water collector 22 and the second water collector 32:

[0180] Calculate the time interval t2 between the last water intake and the current water intake. If t2 is greater than or equal to the second preset time, activate the fourth flow control device 51 and the fifth flow control device 61, and the first water collector 22 and the second water collector 32 will drain water.

[0181] In step S20000, when the time interval t2 between the last water intake and the current water intake is greater than or equal to the second preset time, it indicates that the water production system has not been used for a long time. To prevent the water in the first water collector 22 and the second water collector 32 from accumulating and breeding bacteria, the fourth flow control device 51 and the fifth flow control device 61 are activated. The water in the first water collector 22 is discharged through the first drain pipe 50, and the water in the second water collector 32 is discharged through the second drain pipe 60, until the liquid level is equal to the preset minimum liquid level, that is, when all the water in the first water collector 22 and the second water collector 32 has been discharged, the fourth flow control device 51 and the fifth flow control device 61 are closed. After the drainage is completed, step S30000 can be entered to collect water from the first water collector 22 and the second water collector 32. The preset time can be set with reference to environmental conditions and the rate of bacterial growth, such as 12 hours, 24 hours, etc.

[0182] It is understandable that when the water production system is not equipped with the first drainage pipe 50 and the second drainage pipe 60, or when the time interval t2 between the last water intake and the current water intake is less than the second preset time, step S20000 can be omitted. That is, when the user needs to take water, step S50000 can be executed directly after step S10000.

[0183] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0184] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A water production method applied to a water production system, the water production system comprising a main pipe (10), a first branch pipe (20) and a second branch pipe (30), an inlet of the main pipe (10) being a water inlet end of the water production system, the main pipe (10) being sequentially provided with a first flow control member (13) and a filter assembly (14), the filter assembly (14) comprising a filter cavity (142) and a membrane filter core (141), the membrane filter core (141) being arranged in the filter cavity (142) and dividing the filter cavity (142) into a raw water cavity (1421) and a purified water cavity (1422), the purified water cavity (1422) being provided with a third detection site (143); an inlet of the first branch pipe (20) being located between the filter assembly (14) and an outlet of the main pipe (10), the first branch pipe (20) being sequentially provided with a second on-off valve (21) and a first water collector (22), the first water collector (22) being provided with a first liquid level detection member (221); an inlet of the second branch pipe (30) being located between the filter assembly (14) and the outlet of the main pipe (10), the second branch pipe (30) being sequentially provided with a third on-off valve (31) and a second water collector (32), the second water collector (32) being provided with a second liquid level detection member (321); characterized in that, The water production method comprises the following steps: presetting water collecting conditions of the first water collector (22) and the second water collector (32); real-time acquisition of a first liquid level in the first water collector (22) detected by a first liquid level detection member (221), real-time acquisition of a second liquid level in the second water collector (32) detected by a second liquid level detection member (321), and real-time acquisition of a value T3 of TDS at the third detection position (143); determination of whether the first liquid level and the second liquid level are both higher than a preset highest liquid level; if yes, neither the first water collector (22) nor the second water collector (32) collects water; if no, determination of whether T3 is less than or equal to a first preset high TDS value T30; if no, the second water collector (32) collects water: the second switch valve (21) is closed, the third switch valve (31) is opened, and the first flow control member (13) is started; if yes, determination of whether the first liquid level is higher than the preset highest liquid level; if yes, standing for a first preset time t1, and cyclically performing the step of determining whether T3 is less than or equal to the first preset high TDS value T30; if no, the first water collector (22) collects water: the third switch valve (31) is closed, the second switch valve (21) is opened, and the first flow control member (13) is started.

2. The method of producing water according to claim 1, wherein, In the step of collecting water by the first water collector (22), the following step is further included: the third switch valve (31) is closed, the second switch valve (21) is opened, and the first flow control member (13) is started until the first liquid level is higher than the preset highest liquid level, and the step of determining whether the first liquid level and the second liquid level are both higher than the preset highest liquid level is cyclically performed.

3. The method of producing water of claim 1, wherein, In the step of collecting water by the second water collector (32), the following step is further included: the second switch valve (21) is closed, the third switch valve (31) is opened, and the first flow control member (13) is started until T3 is less than or equal to the first preset high TDS value T30, and the step of determining whether the first liquid level and the second liquid level are both higher than the preset highest liquid level is cyclically performed.

4. The method of producing water according to claim 3, wherein The water production system further comprises a second drainage pipeline (60) provided with a fifth flow control member (61); in the step of collecting water by the second water collector (32), the following step is further included: if the second liquid level is higher than the preset highest liquid level, the fifth flow control member (61) is started, the second water collector (32) simultaneously collects water and drains water until the second liquid level is equal to the preset highest liquid level.

5. The method of producing water of claim 1, wherein, The water production system further comprises a third branch pipeline (40) provided with a fourth switch valve (41) and a flow regulating valve (43) in sequence, and the raw water cavity (1421) is provided with a second detection position (144); in the step of collecting water by the first water collector (22), the following step is further included: acquisition of a value T2 of TDS at the second detection position (144); determination of whether T2 is less than or equal to a second preset high TDS value T20; if yes, the fourth switch valve (41) and the flow regulating valve (43) are closed; if no, the fourth switch valve (41) and the flow regulating valve (43) are opened, and the flow regulating valve (43) is subjected to PID control.

6. The method of producing water of claim 1, wherein, The water production system further comprises a third branch pipeline (40) provided with a fourth switch valve (41) and a flow regulating valve (43) in sequence; and after the water collection of the second water collector (32), the water production method further comprises the steps of: Adjusting to the flushing mode: closing the second switch valve (21) and the third switch valve (31), opening the fourth switch valve (41) and the flow regulating valve (43), and starting the first flow control device (13).

7. The method of producing water of claim 1, wherein, The water production system further comprises a fourth branch pipeline (70) and a fifth branch pipeline (80), the fourth branch pipeline (70) is provided with a second flow control device (71), the fifth branch pipeline (80) is provided with a third flow control device (81), and the fourth branch pipeline (70) is further provided with a first detection site (72); and the water production method further comprises the steps of: Obtaining a value T0 of TDS of the preset water taking; Adjusting to the water taking mode: adjusting the second flow control device (71) to work at a first preset voltage, and adjusting the third flow control device (81) to work at a second preset voltage; Obtaining a value T1 of TDS at the first detection site (72) in real time; Determining whether T1 is equal to T0; If yes, normally taking water; If no, performing PID control on the second flow control device (71) and / or the third flow control device (81).

8. The method of producing water according to claim 7, wherein, In the step of performing PID control on the second flow control device (71) and / or the third flow control device (81) if no, the water production method further comprises the steps of: When T1 is greater than T0, determining whether the working voltage of the second flow control device (71) reaches an upper limit; If yes, lowering the working voltage of the third flow control device (81), and cyclically executing the step of determining whether T1 is equal to T0; If no, raising the working voltage of the second flow control device (71), and cyclically executing the step of determining whether T1 is equal to T0; When T1 is less than T0, determining whether the working voltage of the second flow control device (71) reaches a lower limit; If yes, raising the working voltage of the third flow control device (81), and cyclically executing the step of determining whether T1 is equal to T0; If no, lowering the working voltage of the second flow control device (71), and cyclically executing the step of determining whether T1 is equal to T0; Or, When T1 is greater than T0, determining whether the working voltage of the third flow control device (81) reaches a lower limit; If yes, raising the working voltage of the second flow control device (71), and cyclically executing the step of determining whether T1 is equal to T0; If no, lowering the working voltage of the third flow control device (81), and cyclically executing the step of determining whether T1 is equal to T0; When T1 is less than T0, determining whether the working voltage of the third flow control device (81) reaches an upper limit; If yes, lowering the working voltage of the second flow control device (71), and cyclically executing the step of determining whether T1 is equal to T0; If no, raising the working voltage of the third flow control device (81), and cyclically executing the step of determining whether T1 is equal to T0.

9. The method of producing water of claim 7, wherein, The water production system further comprises a first drainage pipeline (50) and a second drainage pipeline (60), the first drainage pipeline is provided with a fourth flow control device (51), and the second drainage pipeline (60) is provided with a fifth flow control device (61); and the water production method further comprises the steps of: The preset conditions for the first water collector (22) and the second water collector (32) to drain water are: A time period t2 between the last time of taking water and the current time of taking water is calculated, and if t2 is greater than or equal to a second preset time length, the fourth flow control member (51) and the fifth flow control member (61) are started, and the first water collector (22) and the second water collector (32) drain water.

10. A water production system employing the water production method according to any one of claims 1 to 9, characterized by, Comprise: The main pipeline (10) is the water inlet end of the water production system, and the main pipeline (10) is provided with a first flow control member (13) and a filter assembly (14) in sequence, the filter assembly (14) comprises a filter cavity (142) and a membrane filter core (141), the membrane filter core (141) is arranged in the filter cavity (142) and divides the filter cavity (142) into a raw water cavity (1421) and a purified water cavity (1422), and a third detection position (143) is arranged in the purified water cavity (1422); The first branch pipeline (20) is located between the filter assembly (14) and the outlet of the main pipeline (10), and the first branch pipeline (20) is provided with a second switch valve (21) and a first water collector (22) in sequence, and the first water collector (22) is provided with a first liquid level detection member (221); The second branch pipeline (30) is located between the filter assembly (14) and the outlet of the main pipeline (10), and the second branch pipeline (30) is provided with a third switch valve (31) and a second water collector (32) in sequence, and the second water collector (32) is provided with a second liquid level detection member (321).

11. The water producing system of claim 10, wherein, The water production system further comprises a third branch pipeline (40), the inlet of the third branch pipeline (40) is communicated with the purified water cavity (1422), and the third branch pipeline (40) is provided with a fourth switch valve (41) and a flow regulating valve (43) in sequence; The raw water cavity (1421) is provided with a second detection position (144).

12. The water producing system of claim 11, wherein, The water production system further comprises a first drainage pipeline (50), the inlet and the outlet of the first drainage pipeline (50) are communicated with the first water collector (22) and the third branch pipeline (40) respectively, the outlet of the first drainage pipeline (50) is located behind the fourth switch valve (41), the first drainage pipeline (50) is provided with a fourth flow control member (51); and / or The water production system further comprises a second drainage pipeline (60), the inlet and the outlet of the second drainage pipeline (60) are communicated with the second water collector (32) and the third branch pipeline (40) respectively, the outlet of the second drainage pipeline (60) is located behind the fourth switch valve (41), and the second drainage pipeline (60) is provided with a fifth flow control member (61).

13. The water producing system of claim 10, wherein, The water production system further comprises a fourth branch pipeline (70) and a fifth branch pipeline (80), the inlet of the fourth branch pipeline (70) is communicated with the first water collector (22), the outlet of the fourth branch pipeline (70) is the water outlet end of the water production system, and the fourth branch pipeline (70) is provided with a second flow control member (71). The inlet and outlet of the fifth branch pipeline (80) are communicated with the second water collector (32) and the fourth branch pipeline (70) respectively, and the outlet of the fifth branch pipeline (80) is located behind the second flow control member (71), and the fifth branch pipeline (80) is provided with a third flow control member (81); The fourth branch pipeline (70) is further provided with a first detection position (72), and the first detection position (72) is located between the outlet of the fifth branch pipeline (80) and the water outlet end.

14. The water producing system of claim 10, wherein, The main pipeline (10) is further provided with a first switch valve (12), and the first switch valve (12) is located between the water inlet end and the first flow control member (13); and / or, The main pipeline (10) is further provided with a first filter element (11) located between the water inlet end and the first flow control member (13); and / or, The main pipeline (10) is further provided with a second filter element (15) located between the filter assembly (14) and the inlet of the first branch pipeline (20).

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