Water production system and water production method for regulating mineral content

Abstract

The present application relates to a kind of water production system and water production method for adjusting mineral content, water production system includes main pipe, first branch pipe and second branch pipe, main pipe is equipped with water inlet end, first flow control piece, membrane filter core, second detection site and water outlet end in sequence;First branch pipe is equipped with first water collector and second flow control piece in sequence, and first water collector is used to collect low TDS value water;Second branch pipe is equipped with second water collector and third flow control piece in sequence, and second water collector is used to collect high TDS value water;Second switch valve is further provided on main pipe, third switch valve is further provided on first branch pipe, and fourth switch valve is further provided on second branch pipe.Water production system mixes low TDS value water in first water collector or high TDS value water in second water collector with water in main pipe, and controls flow by first flow control piece, second flow control piece and third flow control piece, so that user can obtain water meeting expected TDS value from first cup water.

Description

Technical Field

[0001] This invention relates to the field of water production system technology, and in particular to a water production system and method for adjusting mineral content. 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 high TDS (Total Dissolved Solids) in the first cup of water after a break, sometimes even exceeding that of tap water. Currently, some products drain some water from behind the membrane before each use, wasting water resources. Furthermore, when the time interval between uses is short, the filtered water may have a lower TDS, failing to meet user needs and negatively impacting the user's water consumption experience. Summary of the Invention

[0004] Therefore, it is necessary to provide a water production system and method for adjusting mineral content to address the above problems, so as to ensure water quality safety while enabling users to obtain water with the required mineral content every time.

[0005] This invention first provides a water production system for adjusting mineral content, comprising: a main pipeline, wherein an inlet, a first flow control element, a filter assembly, a second detection position, and an outlet are sequentially arranged on the main pipeline, the filter assembly including a membrane filter element; a first branch pipeline, wherein the inlet and outlet of the first branch pipeline are both located between the second detection position and the outlet, and a first water collector and a second flow control element are sequentially arranged on the first branch pipeline; and a second branch pipeline, wherein the inlet and outlet of the second branch pipeline are both located between the outlet of the first branch pipeline and the outlet, and a second water collector and a third flow control element are sequentially arranged on the second branch pipeline; wherein the main pipeline is further provided with a second switching valve located between the inlet and outlet of the second branch pipeline; the first branch pipeline is further provided with a third switching valve located before the first water collector, and the second branch pipeline is further provided with a fourth switching valve located before the second water collector.

[0006] In the aforementioned water production system for adjusting mineral content, whether the time interval between the last water intake and the current intake is long, resulting in a high TDS value in the main pipeline, or multiple consecutive water intakes result in a low TDS value in the main pipeline, the system can mix the water with low TDS value from the first collector or high TDS value from the second collector with the water in the main pipeline. The first, second, and third flow control components control the flow rate in the main pipeline, the flow rate from the first collector to the main pipeline, and the flow rate from the second collector to the main pipeline, respectively. This achieves precise TDS value adjustment, ensuring that users receive water with the expected TDS value from the very first cup, meaning the mineral content consistently meets their needs. Furthermore, adjusting the first, second, and third flow control components can produce water with different TDS values, satisfying the needs of different user groups and regions. It also avoids excessively high 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.

[0007] In one embodiment, the first water collector is configured as a water tank and is provided with a first liquid level detection element; and / or, the second water collector is configured as a water tank and is provided with a second liquid level detection element.

[0008] With this configuration, the first liquid level detector and the second liquid level detector are used to detect the liquid level in the first water collector and the second water collector, respectively, to ensure that there is sufficient water to mix with the water in the main pipeline during the water intake process.

[0009] In one embodiment, the main pipeline is further provided with a second filter element located between the filter assembly and the second detection position; the filter assembly further includes a filter cavity, the membrane filter element is disposed in the filter cavity and the filter cavity is divided into a raw water cavity communicating with the first flow control element and a purified water cavity communicating with the water outlet, and a third detection position is provided in the purified water cavity.

[0010] With this setup, the third detection position can more accurately detect the TDS value of the water after standing following the membrane filter.

[0011] In one embodiment, the main pipeline is further provided with a first detection position, which is located between the outlet of the second branch pipeline and the water outlet.

[0012] With this configuration, the first detection position is used to detect the TDS value of the mixed water, enabling the water production system to accurately control the first, second, and third flow control components based on the detection results of the first and second detection positions and the user-preset TDS value of the water to be taken, thereby improving the accuracy of the mineral content of the water received by the user.

[0013] In one embodiment, the water production system further includes a third branch pipe disposed after the membrane filter element, the third branch pipe being provided with a fifth switching valve; the water production system further includes a first drain pipe, the inlet and outlet of the first drain pipe being connected to the first water collector and the third branch pipe respectively, and the outlet of the first drain pipe being located after the fifth switching valve, the first drain pipe being provided with a fourth flow control element; and / or, the water production system further includes a second drain pipe, the inlet and outlet of the second drain pipe being connected to the second water collector and the third branch pipe respectively, and the outlet of the second drain pipe being located after the fifth switching valve, the second drain pipe being provided with a fifth flow control element.

[0014] 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.

[0015] In one embodiment, a first switching valve is also provided on the main pipeline, the first switching valve being located between the water inlet and the first flow control element.

[0016] With this configuration, the first switching valve is used to control whether the water at the inlet flows to the first flow control element.

[0017] The present invention also provides a method for adjusting the mineral content of water, applied to the above-mentioned water production system for adjusting mineral content, comprising the following steps:

[0018] Obtain the preset TDS value T0 of the water sample;

[0019] Adjust to water intake mode: Adjust the first flow control element to the maximum voltage, open the second switch valve, and close the third and fourth switch valves;

[0020] Real-time acquisition of the TDS value T2 at the second detection position;

[0021] Determine if T2 is equal to T0;

[0022] If so, then proceed with normal water collection;

[0023] If not, then determine whether T2 is greater than T0;

[0024] If so, the second current control element is adjusted to operate at the first preset voltage, and PID control is applied to the second current control element;

[0025] If not, the third current control element is adjusted to operate at the second preset voltage, and PID control is applied to the third current control element.

[0026] With this setup, when the user adjusts to the water dispensing mode, water is dispensed normally when T2 equals T0. When T2 is greater than T0, the water with low TDS value in the first water collector is mixed with the water with high TDS value in the main pipeline after settling. The second flow control component is then subjected to PID control based on the relationship between T2 and T0, thereby adjusting the flow rate of water from the first water collector to the main pipeline, ensuring that the mixed water remains at T0. When T2 is less than T0, the water with high TDS value in the second water collector is mixed with the water with low TDS value in the main pipeline. The third flow control component is then subjected to PID control based on the relationship between T2 and T0, thereby adjusting the flow rate of water from the second water collector to the main pipeline, ensuring that the mixed water remains at T0. This ensures that the user always receives water with a TDS value of T0 from the very first cup.

[0027] In one embodiment, the first water collector is provided with a first liquid level detection element; the water production method further includes the step of:

[0028] Preset the conditions for water collection in the first water collector:

[0029] The system acquires the first liquid level in the first water collector detected by the first liquid level detection device in real time. If the first liquid level is lower than the preset maximum liquid level and the water collection time is greater than the first preset time t1, the second and fourth switch valves are closed, the third switch valve is opened, and the first flow control device is activated. The first water collector collects water until the liquid level equals the preset maximum liquid level; and / or,

[0030] The first water collector is equipped with a first liquid level detection element, and the filtration assembly includes a third detection position located after the membrane filter element; the water production method further includes the following steps:

[0031] Preset the conditions for water collection in the first water collector:

[0032] The first liquid level in the first water collector is obtained in real time by the first liquid level detection device. The TDS value T3 at the third detection position is obtained. If the first liquid level is lower than the preset maximum liquid level and T3 is less than or equal to the preset low TDS value T10, the second and fourth switch valves are closed, the third switch valve is opened, and the first flow control device is activated. The first water collector collects water until the first liquid level is equal to the preset maximum liquid level.

[0033] With this setup, when the water volume in the first water collector is insufficient, water with a low TDS value after being filtered by the membrane filter is collected to ensure that there is sufficient water in the first water collector to mix with the water in the main pipeline each time water is drawn.

[0034] In one embodiment, the filtration assembly includes a third detection position located after the membrane filter element, and the water production system further includes a second drain pipe with a fifth flow control element on the second drain pipe; the water production method further includes the step of:

[0035] Preset the conditions for water collection in the second water collector:

[0036] The TDS value T3 at the third detection position is obtained. If T3 is greater than or equal to the preset high TDS value T20, the second and third switch valves are closed, the fourth switch valve is opened, and the first flow control device is activated. The second water collector collects water until T3 is less than the preset high TDS value T20.

[0037] This setup avoids the situation where the TDS value of the water in the main pipeline is too high, making it difficult to mix until the TDS value equals T0. It also ensures that there is enough water in the second water collector to mix with the water in the main pipeline each time water is drawn.

[0038] In one embodiment, the second water collector is provided with a second liquid level detection element; the step of setting the conditions for water collection in the second water collector further includes the step of:

[0039] The second liquid level in the second water collector is detected in real time by the second liquid level detection device. 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 is equal to the preset maximum liquid level.

[0040] This design prevents water from overflowing from the second water collector.

[0041] In one embodiment, the main pipeline is further provided with a first detection position; in the step of adjusting the second current control element to operate at the first preset voltage and performing PID control on the second current control element, the step further includes:

[0042] Real-time acquisition of the TDS value T1 at the first detection position;

[0043] Determine if T1 is equal to T0;

[0044] If so, then proceed with normal water collection;

[0045] If not, then PID control is applied to the second flow control element.

[0046] With this setup, the second flow control element is PID controlled based on the relationship between T1, T2, and T0 to precisely adjust its voltage. This ensures that the TDS value of the water flowing from the outlet is precisely controlled at T0, improving the accuracy of the mineral content in the water received by the user and meeting their needs.

[0047] In one embodiment, the step of performing PID control on the second flow control element if not specified further includes the step of:

[0048] When T1 is greater than T0, determine whether the operating voltage of the second current control device has reached the upper limit;

[0049] If so, then lower the operating voltage of the first current control device and repeatedly execute the step of determining whether T1 is equal to T0;

[0050] If not, then increase the operating voltage of the second current control device and repeatedly execute the step of determining whether T1 is equal to T0;

[0051] When T1 is less than T0, determine whether the operating voltage of the second current control device has reached the lower limit;

[0052] If yes, maintain the lower limit voltage of the second current control device and indicate that the TDS value is lower than T0; or, if yes, start the third current control device and perform PID control on the third current control device.

[0053] If not, then lower the operating voltage of the second current control device and repeatedly execute the step of determining whether T1 is equal to T0.

[0054] 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 first flow control component; and 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 activating the third flow control component.

[0055] In one embodiment, the main pipeline is further provided with a first detection position; in the step of adjusting the third current control element to operate at the second preset voltage and performing PID control on the third current control element if the condition is not met, the step further includes:

[0056] Real-time acquisition of the TDS value T1 at the first detection position;

[0057] Determine if T1 is equal to T0;

[0058] If so, then proceed with normal water collection;

[0059] If not, then PID control is applied to the third flow control element.

[0060] With this setup, the third flow control component is PID controlled based on the relationship between T1, T2, and T0 to precisely adjust its voltage. This ensures that the TDS value of the water flowing from the outlet is precisely controlled at T0, improving the accuracy of the mineral content in the water received by the user and meeting their needs.

[0061] In one embodiment, the step of performing PID control on the third flow control device if not specified further includes the step of:

[0062] When T1 is less than T0, determine whether the operating voltage of the third current control device has reached the upper limit;

[0063] If so, then lower the operating voltage of the first current control device and repeatedly execute the step of determining whether T1 is equal to T0;

[0064] If not, then increase the operating voltage of the third current control device and repeatedly execute the step of determining whether T1 is equal to T0;

[0065] When T1 is greater than T0, determine whether the operating voltage of the third current control device has reached the lower limit;

[0066] If yes, maintain the lower limit voltage of the third current control device and indicate that the TDS value is lower than T0; or, if yes, start the second current control device and perform PID control on the second current control device.

[0067] If not, then lower the operating voltage of the third current control device and repeatedly execute the step of determining whether T1 is equal to T0.

[0068] With this setup, the mineral content of the water flowing out of the outlet can be increased by raising the operating voltage of the third flow control component or lowering the operating voltage of the first flow control component; conversely, the mineral content of the water flowing out of the outlet can be decreased by lowering the operating voltage of the third flow control component or activating the second flow control component.

[0069] 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; before the step of adjusting to the water intake mode, the system further includes the following step:

[0070] Preset the drainage conditions for the first and second water collectors:

[0071] Calculate the time interval t3 between the last water intake and the current water intake. If t3 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.

[0072] 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

[0073] 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.

[0074] Figure 1 This is a diagram of a water production system for adjusting mineral content according to one embodiment of the present invention;

[0075] Figure 2 This is a flowchart of the water production method for adjusting mineral content according to the present invention;

[0076] Figure 3 This is a flowchart of the water production method for adjusting mineral content according to the present invention. Figure 1 ;

[0077] Figure 4 This is a flowchart of the water production method for adjusting mineral content according to the present invention. Figure 2 ;

[0078] Figure 5 This is a flowchart of the water production method for adjusting mineral content according to the present invention. Figure 3 .

[0079] 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; 15. Second filter element; 16. Second detection position; 17. Second switching valve; 18. First detection position; 191. First check valve; 192. Second check valve; 20. First branch pipeline; 21. Third switching valve; 22. First water collection point. Device; 221, First liquid level detection element; 222, First sterilization device; 23, Second flow control element; 30, Second branch pipeline; 31, Fourth switch valve; 32, Second water collector; 321, Second liquid level detection element; 322, Second sterilization device; 33, Third flow control element; 40, Third branch pipeline; 41, Fifth switch valve; 42, Third check valve; 50, First drainage pipeline; 51, Fourth flow control element; 52, Fourth check valve; 60, Second drainage pipeline; 61, Fifth flow control element; 62, Fifth check valve. Detailed Implementation

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] 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.

[0086] However, both nanofiltration and reverse osmosis products suffer from ion migration issues after a period of inactivity. This results in a high TDS (Total Dissolved Solids) in the first cup of water after a break, sometimes even exceeding that of tap water. Currently, some products drain some water from behind the membrane before each use, wasting water resources. Furthermore, when the time interval between uses is short, the filtered water may have a lower TDS, failing to meet user needs and negatively impacting the user's water consumption experience.

[0087] To solve the above problems, such as Figure 1 As shown, this invention first provides a water production system for adjusting mineral content. This system can be applied to water purification products to ensure water quality safety while adjusting the mineral content in the water according to user needs, so that users can obtain water with the required mineral content each time. The mineral content in the water, also known as the total dissolved solids (TDS) value, will be referred to as TDS value below.

[0088] 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 main pipeline 10 is sequentially equipped with an inlet, a first flow control element 13, a filter assembly 14, a second detection position 16, and an outlet. The filter assembly 14 includes a membrane filter element 141. The inlet and outlet of the first branch pipeline 20 are both located between the second detection position 16 and the outlet. The first branch pipeline 20 is sequentially equipped with a first water collector 22 and a second flow control element 23. The first water collector 22 is used to collect water with low TDS values. The second branch pipeline 30... The inlet and outlet are both located between the outlet and the water outlet of the first branch pipe 20. The second branch pipe 30 is equipped with a second water collector 32 and a third flow control device 33 in sequence. The second water collector 32 is used to collect water with high TDS values. The main pipe 10 is also equipped with a second switch valve 17, which is located between the inlet and outlet of the second branch pipe 30. The first branch pipe 20 is also equipped with a third switch valve 21 located before the first water collector 22, and the second branch pipe 30 is also equipped with a fourth switch valve 31 located before the second water collector 32.

[0089] In the water production system provided in this embodiment of the invention, in the main pipeline 10, the inlet end can be connected to the raw water source, and the outlet end can be connected to the outlet of the purified water product; the first flow control element 13 is used to adjust the water supply flow rate of the main pipeline 10, that is, to adjust the flow rate 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 second detection position 16 is used to detect the TDS value of the water after being filtered by the membrane filter element 141; the second switch valve 17 is used to control whether the water after being filtered by the membrane filter element 141 flows to the outlet end. 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 third switch valve 21 is used to control whether the water in the main pipeline 10 flows to the first water collector 22, and the second flow control element 23 is used to control the flow rate of water discharged from the first water collector 22 into the main pipeline 10. In the second branch pipe 30, the second water collector 32 is used to collect water with high TDS value from the main pipe 10 after it has been left to stand. The fourth switch valve 31 is used to control whether the water in the main pipe 10 flows to the second water collector 32. The third flow control element 33 is used to control the flow rate of the water in the second water collector 32 discharged into the main pipe 10.

[0090] By controlling the opening and closing of the second switch valve 17, the third switch valve 21, and the fourth switch valve 31, the direction of water flow in the main pipeline 10 can be controlled. When the second switch valve 17 is open and the third switch valve 21 and the fourth switch valve 31 are closed, the water in the main pipeline 10 will not enter the first branch pipeline 20 and the second branch pipeline 30, but will flow out from the outlet end through the second switch valve 17. When the second switch valve 17 and the fourth switch valve 31 are closed and the third switch valve 21 is open, the main pipeline 10 is cut off by the second switch valve 17, and the water in the main pipeline 10 will not enter the second branch pipeline 30. The water flows through the first branch pipeline 20 into the first water collector 22. When the second switch valve 17 and the third switch valve 21 are closed and the fourth switch valve 31 is open, the main pipeline 10 is cut off by the second switch valve 17, and the water in the main pipeline 10 will not enter the first branch pipeline 20. The water flows through the second branch pipeline 30 into the second water collector 32.

[0091] The second detection bit 16 can be tested using a TDS meter. For ease of description, the user-preset TDS value of the water sample is set as T0, and the TDS value detected by the TDS meter using the second detection bit 16 is set as T2.

[0092] 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.

[0093] During the water collection process, water flows within the main pipeline 10. The membrane filter 141 intercepts minerals, allowing the first water collector 22 to collect water with a low TDS value after filtration 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 water with a high TDS value. For ease of description, the first water collector 22 is designed to collect water with a preset low TDS value T10, and the second water collector 32 is designed to collect water with a preset high TDS value T20. The values ​​of T10 and T20 can be set according to actual needs.

[0094] During the water intake process, the user sets the TDS value T0 of the water to be taken, adjusts to the water intake mode, activates the first flow control element 13, opens the second switch valve 17, and closes the third switch valve 21, the fourth switch valve 31, the second flow control element 23, and the third flow control element 33. Water in the main pipeline 10 flows from the inlet to the outlet. The relationship between T2 and T0 at the second detection position 16 is detected. When T2 = T0, the second flow control element 23 and the third flow control element 33 remain closed, and the TDS value of the water flowing out from the outlet is equal to T0. When T2 > T0, the second flow control element 23 is activated, and the third flow control element 33 remains closed. Low-TDS water in the first water collector 22 flows into the main pipeline 10 and mixes with the high-TDS water in the main pipeline 10. Furthermore, the system can perform PID control on the first flow control element 13 and the second flow control element 23 based on the relationship between T2 and T0. The voltages of the first flow control element 13 and the second flow control element 23 are adjusted to regulate the water flow rate in the main pipeline 10 and the water flow rate from the first water collector 22 into the main pipeline 10, so that the mixed water can be maintained at T0. When T2 < T0, the third flow control element 33 is activated, while the second flow control element 23 remains closed. The high TDS water in the second water collector 32 flows into the main pipeline 10 and mixes with the low TDS water in the main pipeline 10. The first flow control element 13 and the third flow control element 33 can be PID controlled according to the relationship between T2 and T0 to adjust their voltages, thereby regulating the water flow rate in the main pipeline 10 and the water flow rate from the second water collector 32 into the main pipeline 10, so that the mixed water can be maintained at T0. After water intake is completed, the first flow control element 13, the second flow control element 23, and the third flow control element 33 are turned off.

[0095] In other words, whether the time interval between the last water draw and the current water draw is long (e.g., more than 2 hours), resulting in a high TDS value in the main pipe 10, or multiple consecutive water draws result in a low TDS value in the main pipe 10, the water with a low TDS value in the first water collector 22 or a high TDS value in the second water collector 32 can be mixed with the water in the main pipe 10. The flow rate in the main pipe 10, the flow rate from the first water collector 22 to the main pipe 10, and the flow rate from the second water collector 32 to the main pipe 10 are controlled by the first flow control element 13, the second flow control element 23, and the third flow control element 33, respectively. This achieves the purpose of precisely adjusting the TDS value, so that the user can receive water with a TDS value equal to T0 from the first cup. That is, the TDS value of the water obtained by the user will neither be greater than T0 nor less than T0, and the mineral content can always meet the user's needs. Furthermore, by applying PID control to the first flow control element 13, the second flow control element 23, and the third flow control element 33, water with different TDS values ​​can be obtained, thereby meeting the needs of different user groups and regions. This also avoids problems such as excessive mineral content affecting the taste of the water or causing bacterial growth, while preventing the precipitation of harmful substances such as heavy metal ions, thus ensuring the safety of the purified water. The second detection position 16 is located after the membrane filter element 141 and before the inlet of the first branch pipe 20, enabling the water production system to promptly apply PID control to the first flow control element 13, the second flow control element 23, and the third flow control element 33 based on the relationship between the detection results T2 and T0 of the second detection position 16. This ensures that the water flowing from the outlet has a mixed mineral content that meets the user's requirements.

[0096] 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 the current draw. This "significant time gap" can be set to 1 hour, 2 hours, 3 hours, or longer. "Multiple consecutive water draws" refers to water taken when there's a relatively short time gap between the user's last water draw and the current draw. This "short time gap" can be set to less than or equal to 20 minutes, 30 minutes, or 1 hour, etc.

[0097] 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.

[0098] like Figure 1As shown, since the TDS value in the main pipeline 10 may change after filtration by the second filter element 15, and the minerals before and after the second filter element 15 will not migrate after standing for a period of time, the filter assembly 14 also includes a filter chamber 142. The membrane filter element 141 is disposed in the filter chamber 142, which divides the filter chamber 142 into a raw water chamber 1421 connected to the first flow control element 13 and a purified water chamber 1422 connected to the water outlet. A third detection position 143 is provided in the purified water chamber 1422. The third detection position 143 can more accurately detect the TDS value of the water in the purified water chamber 1422, and thus can more accurately detect the TDS value of the water after standing after the membrane filter element 141. Furthermore, to ensure that the second water collector 32 can collect enough water with high TDS values, it is preferable to design the volume of the purified water chamber 1422 to be relatively large. The third detection bit 143 can be tested by a TDS tester. For ease of description, the TDS value detected by the TDS tester for the third detection bit 143 is set as T3.

[0099] 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.

[0100] like Figure 1 As shown, to prevent water flowing out of the first branch pipe 20 from flowing towards the inlet of the main pipe 10, a first check valve 191 is also provided on the main pipe 10, located between the inlet and outlet of the first branch pipe 20. Similarly, to prevent water flowing out of the second branch pipe 30 from flowing towards the inlet of the main pipe 10, a second check valve 192 is also provided on the main pipe 10, located between the second switch valve 17 and the outlet of the second branch pipe 30.

[0101] like Figure 1 As shown, the main pipeline 10 is also equipped with a first detection position 18, which is located between the outlet and the water outlet of the second branch pipeline 30. The first detection position 18 is used to detect the TDS value of the mixed water. The first detection position 18 can be tested by a TDS tester. For ease of description, the TDS value detected by the first detection position 18 by the TDS tester is denoted as T1.

[0102] During the water intake process, when T2 > T0, the second flow control device 23 is activated and adjusted to operate at the first preset voltage (e.g., half of the maximum operating voltage). Low-TDS water in the first water collector 22 flows into the main pipe 10 and mixes with the high-TDS water in the main pipe 10. The relationship between T1 and T0 at the first detection position 18 is detected. When T1 = T0, the TDS value of the water flowing from the outlet is T0, meeting user requirements. The voltages of the first flow control device 13 and the second flow control device 23 are stabilized at the current voltage, and the current operating voltage of the second flow control device 23 is used as the first preset voltage for the second flow control device 23 during the next water intake.

[0103] When T1 < T0, it is necessary to increase the mineral content in the water. Since the operating voltage of the first flow control device 13 has reached the upper limit, it is necessary to determine whether the operating voltage of the second flow control device 23 has reached the lower limit. If the operating voltage of the second flow control device 23 has reached the lower limit, the second flow control device 23 will be maintained at the lower limit voltage and the user will be prompted that the TDS value is lower than T0. Alternatively, when the operating voltage of the second flow control device 23 has reached the lower limit, the third flow control device 33 will be activated and PID control will be performed on the third flow control device 33 so that the water with high TDS value in the second water collector 32 flows to the main pipeline 10 to increase the mineral content of the water flowing out from the outlet. After the third flow control device 33 is PID controlled, the relationship between T1 and T0 of the first detection bit 18 will be detected again until T1 = T0. If the operating voltage of the second flow control device 23 does not reach the lower limit, the operating voltage of the second flow control device 23 is reduced to decrease the flow rate of water from the first water collector 22 to the main pipeline 10, thereby increasing the mineral content of the water flowing out from the outlet. After the voltage is reduced, the relationship between T1 and T0 of the first detection position 18 is checked again until T1 = T0.

[0104] When T1 > T0, the mineral content in the water needs to be reduced. It is determined whether the operating voltage of the second flow control element 23 has reached its upper limit. If the operating voltage of the second flow control element 23 has not reached its upper limit, its operating voltage is increased to increase the flow rate of water from the first water collector 22 to the main pipe 10, thereby reducing the mineral content of the water flowing out from the outlet. After increasing the voltage, the relationship between T1 and T0 at the first detection position 18 is checked again until T1 = T0. If the operating voltage of the second flow control element 23 has reached its upper limit, the operating voltage of the first flow control element 13 is decreased to reduce the flow rate of water from the main pipe 10, thereby reducing the mineral content of the water flowing out from the outlet. After decreasing the voltage, the relationship between T1 and T0 at the first detection position 18 is checked again until T1 = T0.

[0105] Similarly, when T2 < T0, the third flow control device 33 is activated and adjusted to operate at the second preset voltage (e.g., half of the maximum operating voltage). The high TDS water in the second water collector 32 flows into the main pipe 10 and mixes with the low TDS water in the main pipe 10. The relationship between T1 and T0 of the first detection position 18 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 first flow control device 13 and the third flow control device 33 are stabilized at the current voltage, and the current operating voltage of the third flow control device 33 is used as the second preset voltage of the third flow control device 33 for the next water intake.

[0106] When T1 > T0, it is necessary to reduce the mineral content in the water. Since the operating voltage of the first flow control device 13 has reached the upper limit, it is necessary to determine whether the operating voltage of the third flow control device 33 has reached the lower limit. If the operating voltage of the second flow control device 23 has reached the lower limit, the third flow control device 33 will be maintained at the lower limit voltage and the user will be prompted that the TDS value is lower than T0. Alternatively, when the operating voltage of the third flow control device 33 has reached the lower limit, the third flow control device 33 will be activated and the second flow control device 23 will be PID controlled so that the water with low TDS value in the first water collector 22 flows to the main pipeline 10 to reduce the mineral content of the water flowing out from the outlet. After the second flow control device 23 is PID controlled, the relationship between T1 and T0 of the first detection bit 18 will be detected again until T1 = T0. If the operating voltage of the third flow control device 33 does not reach the lower limit, the operating voltage of the third flow control device 33 is lowered to reduce the flow rate of water from the second water collector 32 to the main pipeline 10, thereby reducing the mineral content of the water flowing out from the outlet. After the voltage is lowered, the relationship between T1 and T0 of the first detection position 18 is checked again until T1 = T0.

[0107] When T1 < T0, the mineral content in the water needs to be increased. It is determined whether the operating voltage of the third flow control device 33 has reached its upper limit. If the operating voltage of the third flow control device 33 has not reached its upper limit, the operating voltage of the third flow control device 33 is increased to increase the flow rate of water from the second water collector 32 to the main pipe 10, thereby increasing the mineral content of the water flowing out from the outlet. After increasing the voltage, the relationship between T1 and T0 at the first detection position 18 is checked again until T1 = T0. If the operating voltage of the third flow control device 33 has reached its upper limit, the operating voltage of the first flow control device 13 is decreased to reduce the flow rate of water from the main pipe 10, thereby increasing the mineral content of the water flowing out from the outlet. After decreasing the voltage, the relationship between T1 and T0 at the first detection position 18 is checked again until T1 = T0.

[0108] This enables the water production system to precisely control the first flow control element 13, the second flow control element 23, and the third flow control element 33 based on the relationship between the detection results T1, T2, and T0 of the first detection position 18 and the second detection position 16, so as to precisely control the TDS value of the water flowing out of the outlet at T0, thereby improving the accuracy of the mineral content of the water received by the user.

[0109] like Figure 1 As shown, the first water collector 22 is configured as a water tank, and a first liquid level detection element 221 is installed inside the first water collector 22; the second water collector 32 is configured as a water tank, and a second liquid level detection element 321 is installed inside the second water collector 32. The first liquid level detection element 221 and the second liquid level detection element 321 are respectively used to measure the liquid level in the first water collector 22 and the second water collector 32. The water production system stores 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 to mix with the water in the main pipeline 10 during the water intake process, and also ensures that the water in the first water collector 22 and the second water collector 32 will not overflow; 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. Of course, the first water collector 22 and the second water collector 32 can also be set as other water collection structures such as pressure tanks.

[0110] In the illustrated embodiment, both the first liquid level detection element 221 and the second liquid level detection element 321 are configured as contact liquid level sensors, such as low-level sensors and high-level sensors arranged at intervals 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 sensor and the high-level sensor are triggered. Of course, in other embodiments, 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 or 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.

[0111] like Figure 1As shown, the water production system also includes a third branch pipe 40 located after the membrane filter element 141, and a fifth switching valve 41 is installed on the third branch pipe 40. The fifth switching valve 41 is used to control the opening and closing of the third branch pipe 40. A third one-way valve 42 is also installed on the third branch pipe 40, located between the fifth switching valve 41 and the outlet of the third branch pipe 40. The direction of the third one-way valve 42 is the flow direction from the membrane filter element 141 towards the third branch pipe 40, to prevent water from the third branch pipe 40 from flowing into the main pipe 10. When it is necessary to empty the main pipe 10 or to flush the membrane filter element 141, the fifth switching valve 41 is opened, allowing wastewater in the main pipe 10 to be discharged through the third branch pipe 40.

[0112] 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 fifth switch valve 41. A fourth flow control element 51 is provided on the first drain pipe 50. A fourth 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 fourth 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.

[0113] 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 fifth switch valve 41. A fifth flow control element 61 is provided on the second drain pipe 60. A fifth 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 fifth 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.

[0114] To better configure the drainage method 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 to t3. If t3 is greater than or equal to the 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 fifth switch valve 41 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.

[0115] To better configure the water collection method of the first water collector 22, this application specifies that when the first liquid level detection element 221 detects that the liquid level in the first water collector 22 is lower than the preset maximum liquid level, and T3≤T10, the second switch valve 17 and the fourth switch valve 31 are closed, the third 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 until the liquid level equals the preset maximum liquid level, to ensure that there is sufficient water in the tank to mix with the water in the main pipeline 10 during the next water intake. Alternatively, when the first liquid level detection element 221 detects that the liquid level in the first water collector 22 is lower than the preset maximum liquid level, and the water intake time is greater than the first preset time t1 (e.g., greater than 20s, 30s, or longer), the first water collector 22 collects water until the liquid level equals the preset maximum liquid level.

[0116] To better configure the water collection method of the second water collector 32, this application specifies that when T3 ≥ T20, the second switch valve 17 and the third switch valve 21 are closed, the fourth switch valve 31 is opened, and the first flow control device 13 is activated, allowing the high TDS water that has been left to settle in the main pipeline 10 to flow into the second water collector 32 for collection. Simultaneously, when the second liquid level detection device 321 detects that the liquid level in the second water collector 32 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 to prevent water overflow from the second water collector 32.

[0117] 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).

[0118] In this application, the first flow control element 13, the second flow control element 23, the third flow control element 33, 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 17, the third switching valve 21, the fourth switching valve 31, and the fifth switching valve 41 are all solenoid valves or electrically controlled regulating valves. 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 18, the second detection position 16, 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.

[0119] like Figures 2 to 3 As shown, this embodiment of the invention also provides a method for adjusting the mineral content of produced water, applied to the above-mentioned water production system for adjusting mineral content, including the following steps:

[0120] S1000. Obtain the preset TDS value T0 of the water sample;

[0121] S2000. Preset the conditions for water collection and drainage of the first water collector 22 and the second water collector 32;

[0122] S3000. Adjust to water intake mode: Adjust the first flow control element 13 to the maximum voltage operation, open the second switch valve 17, and close the third switch valve 21 and the fourth switch valve 31;

[0123] S4000. Real-time acquisition of the TDS value T2 at the second detection bit 16;

[0124] S5000. Determine if T2 is equal to T0;

[0125] If so, then proceed with normal water collection;

[0126] If not, then determine whether T2 is greater than T0;

[0127] S5100. If so, adjust the second current control element 23 to operate at the first preset voltage, and perform PID control on the second current control element 23;

[0128] S5200. If not, adjust the third current control element 33 to operate at the second preset voltage and perform PID control on the third current control element 33.

[0129] In step S1000, 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.

[0130] When the user switches to the water intake mode, the water production system executes step S3000.

[0131] In step S4000, the TDS value T2 of the second detection bit 16 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. It is understood that this value can be obtained in real time in the system applied to this water production method.

[0132] In step S5000, it is determined whether T2 is equal to T0. When T2 is equal to T0, the second flow control device 23 is kept closed, and the TDS value of the water flowing out from the outlet is equal to T0. When T2 is greater than T0, the second flow control device 23 is activated and adjusted to the first preset voltage to mix the water with low TDS value in the first water collector 22 and the water with high TDS value in the main pipeline 10. The second flow control device 23 is PID controlled according to the relationship between T2 and T0 to adjust the voltage of the second flow control device 23 in real time, thereby adjusting the flow rate of the water discharged from the first water collector 22 to the main pipeline 10, so that the mixed water can be maintained at T0. When T2 is less than T0, the third flow control device 33 is activated and adjusted to the second preset voltage. This mixes the water with high TDS value in the second water collector 32 with the water with low TDS value in the main pipeline 10. The third flow control device 33 is then subjected to PID control based on the relationship between T2 and T0 to adjust its voltage in real time. This, in turn, regulates the flow rate of water discharged from the second water collector 32 into the main pipeline 10, ensuring that the mixed water is maintained at T0 to meet user needs.

[0133] Furthermore, since the first water collector 22 collects water with a low TDS value and the second water collector 32 collects water with a high TDS value, when the interval between the next water draw and the current water draw is long, resulting in a high TDS value in the main pipe 10, the low TDS value water in the first water collector 22 can be mixed with the high TDS value water in the main pipe 10, so that the user can receive water with a TDS value of T0 from the very first cup. When multiple consecutive water draws result in a low TDS value in the main pipe 10, the high TDS value water in the second water collector 32 can be mixed with the low TDS value water in the main pipe 10, so that the user can always receive water with a TDS value of T0 from the very first cup.

[0134] like Figure 1 As shown, step S2000 further includes the step: S2100. Presetting the conditions for water collection in the first water collector 22:

[0135] In one implementation, step S2100 includes:

[0136] S2110. The first liquid level in the first water collector 22 detected by the first liquid level detection device 221 is obtained in real time. If the first liquid level is lower than the preset maximum liquid level and the water collection time is greater than the first preset time t1, the second switch valve 17 and the fourth switch valve 31 are closed, the third switch valve 21 is opened, and the first flow control device 13 is started. The first water collector 22 collects water until the liquid level is equal to the preset maximum liquid level.

[0137] In another embodiment, step S2100 includes:

[0138] S2120. The first liquid level in the first water collector 22 detected by the first liquid level detection element 221 is obtained in real time. The TDS value T3 at the third detection position 143 is obtained. If the first liquid level is lower than the preset maximum liquid level and T3 is less than or equal to the preset low TDS value T10, the second switch valve 17 and the fourth switch valve 31 are closed, the third switch valve 21 is opened, and the first flow control element 13 is started. The first water collector 22 collects water until the first liquid level is equal to the preset maximum liquid level.

[0139] In step S2100, the liquid level in the first water collector 22, detected by the first liquid level detector 221, is acquired in real time. If the liquid level is lower than the preset maximum liquid level, it indicates that the water volume in the first water collector 22 is insufficient. If the water collection time is greater than the first preset time t1 (e.g., greater than 1 minute, 2 minutes, 3 minutes, or longer), or if T3 is less than or equal to the preset low TDS value T10, it indicates that the TDS value in the main pipeline 10 is lower than T10. At this time, the second switch valve 17 and the fourth switch valve 31 are closed, the third 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 until the liquid level in the first water collector 22 equals the preset maximum liquid level, ensuring that there is sufficient water in the first water collector 22 to mix with the water in the main pipeline 10 each time water is collected. If the liquid level equals the preset maximum liquid level, it indicates that the water volume in the first water collector 22 is sufficient, the first water collector 22 does not collect water, and the water production system stops working.

[0140] S2200. Preset the conditions for water collection in the second water collector 32:

[0141] S2210. Obtain the TDS value T3 at the third detection position 143. If T3 is greater than or equal to the preset high TDS value T20, close the second switch valve 17 and the third switch valve 21, open the fourth switch valve 31, and start the first flow control element 13 and the second water collector 32 to collect water until T3 is less than the preset high TDS value T20.

[0142] S2220. The second liquid level in the second water collector 32 detected by the second liquid level detection device 321 is obtained in real time. 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 is equal to the preset maximum liquid level.

[0143] In step S2210, the liquid level in the second water collector 32, detected by the second liquid level detector 321, is acquired in real time. If T3 is greater than or equal to the preset high TDS value T20, it indicates that the TDS value in the main pipeline 10 is higher than T20. At this time, the second switch valve 17 and the third switch valve 21 are closed, the fourth switch valve 31 is opened, and the first flow control device 13 is activated, so that the high TDS water in the main pipeline 10 flows into the second water collector 32 for collection until T3 is less than the preset high TDS value T20, or the second water collector 32 continues to collect water for a third preset time (e.g., greater than 20s, 30s, or longer). This avoids the situation where the TDS value of the water in the main pipeline 10 is too high, making it difficult to mix until the TDS value equals T0, and also ensures that there is sufficient water in the second water collector 32 to mix with the water in the main pipeline 10 each time water is drawn.

[0144] In step S2220, when the second liquid level detection element 321 detects that the liquid level in the second water collector 32 is higher than the preset maximum liquid level, the fifth flow control element 61 is activated, and the second water collector 32 simultaneously collects and drains water to prevent water from overflowing from the second water collector 32.

[0145] 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. Of course, they can also determine whether the water collection conditions are met during the water intake process or during the static process, so as 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.

[0146] Before step S3000, the following step is also included:

[0147] S2300. Preset the drainage conditions for the first water collector 22 and the second water collector 32:

[0148] Calculate the time interval t3 between the last water intake and the current water intake. If t3 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.

[0149] In step S2300, when the time interval t3 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 turned off. After the drainage is completed, steps S2100 and S2200 can be performed 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.

[0150] It is understandable that steps S2100 and S2200 can be omitted when both the first water collector 22 and the second water collector 32 have sufficient water, or when the first water collector 22 and the second water collector 32 can be replenished with water through external devices; similarly, step S2300 can be omitted when the water production system is not equipped with the first drain pipe 50 and the second drain pipe 60. That is, when a user needs to obtain water, step S3000 can be executed directly after step S1000.

[0151] like Figures 2 to 4 As shown, specifically, step S5100 further includes the following step:

[0152] S5110. Real-time acquisition of the TDS value T1 at the first detection bit 18;

[0153] S5120. Determine whether T1 is equal to T0;

[0154] If so, then proceed with normal water collection;

[0155] If not, then PID control is applied to the second flow control element 23.

[0156] In step S5110, the TDS value T1 of the first detection bit 18 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.

[0157] In step S5120, it is determined whether T1 is equal to T0. When T1 equals T0, the second flow control element 23 remains closed, and the TDS value of the water flowing out from the outlet is equal to T0. When T1 is not equal to T0, PID control is applied to the second flow control element 23 according to the relationship between T1, T2, and T0 to precisely adjust the voltage of the second flow control element 23, thereby adjusting the flow rate of water discharged from the first water collector 22 into the main pipeline 10 until T1 equals T0. This allows the TDS value of the water flowing out from the outlet to be precisely controlled at T0, improving the accuracy of the mineral content of the water received by the user and meeting user needs.

[0158] like Figure 2 and Figure 4 As shown, when T1 is not equal to T0, there are two possibilities: T1 is greater than T0 or less than T0. Therefore, in step S5120, PID control is performed on the second flow control element 23, which also includes the following steps:

[0159] S5121. When T1 is greater than T0, determine whether the operating voltage of the second current control device 23 has reached the upper limit;

[0160] If so, the operating voltage of the first current control device 13 is reduced, and step S5120 is executed repeatedly.

[0161] If not, the operating voltage of the second current control device 23 is increased, and step S5120 is executed repeatedly.

[0162] S5122. When T1 is less than T0, determine whether the operating voltage of the second current control device 23 has reached the lower limit;

[0163] If so, the lower limit voltage of the second current control device 23 will be maintained, and a message will be displayed indicating that the TDS value is lower than T0;

[0164] If not, then lower the operating voltage of the second current control device 23 and repeat step S5120.

[0165] In step S5121, when T1 is greater than T0, the mineral content in the water needs to be reduced. It is determined whether the operating voltage of the second flow control element 23 has reached its upper limit. If the operating voltage of the second flow control element 23 has not reached its upper limit, the operating voltage of the second flow control element 23 is increased to increase the flow rate of water from the first water collector 22 to the main pipeline 10, thereby reducing the mineral content of the water flowing out from the outlet. After the increase, step S5120 is repeated, that is, the relationship between T1 and T0 of the first detection bit 18 is checked again until T1 = T0. If the operating voltage of the second flow control element 23 has reached its upper limit, the operating voltage of the first flow control element 13 is decreased to reduce the flow rate of water in the main pipeline 10, thereby reducing the mineral content of the water flowing out from the outlet. After the decrease, step S5120 is repeated, that is, the relationship between T1 and T0 of the first detection bit 18 is checked again until T1 = T0, to meet the user's needs.

[0166] Alternatively, since the operating voltage of the second flow control element 23 is not changed during the step of lowering the operating voltage of the first flow control element 13, the relationship between T1 and T0 of the first detection bit 18 can be checked again after the lowering. If T1 equals T0, water is drawn normally; if T1 is still greater than T0, the operating voltage of the first flow control element 13 is lowered again until T1 = T0. That is, the step of determining whether the operating voltage of the second flow control element 23 has reached its upper limit can be omitted.

[0167] In step S5122, when T1 is less than T0, the mineral content in the water needs to be increased. Since the operating voltage of the first flow control element 13 has reached its upper limit, it is necessary to determine whether the operating voltage of the second flow control element 23 has reached its lower limit. If the operating voltage of the second flow control element 23 has reached its lower limit, the mineral content in the water cannot be increased further. The water production system maintains the lower limit voltage of the second flow control element 23 to maintain the current mineral content in the water and prompts the user that the TDS value of the water taken at this time is lower than T0. If the operating voltage of the second flow control element 23 has not reached its lower limit, the operating voltage of the second flow control element 23 is reduced to decrease the flow rate of water from the first water collector 22 to the main pipeline 10, thereby increasing the mineral content of the water flowing out from the outlet. After the reduction, step S5120 is executed repeatedly, that is, the relationship between T1 and T0 of the first detection bit 18 is checked again until T1 = T0.

[0168] Alternatively, when the operating voltage of the second flow control element 23 reaches its lower limit, the third flow control element 33 can also be activated and subjected to PID control. This allows the high TDS water in the second water collector 32 to flow into the main pipe 10 and mix with the water in the main pipe 10 whose TDS value has not reached T0. By applying PID control to the third flow control element 33, the TDS value of the water flowing out from the outlet can be precisely controlled at T0 to meet user needs.

[0169] like Figure 2 , Figure 3 and Figure 5 As shown, step S5200 further includes the following step:

[0170] S5210. Real-time acquisition of the TDS value T1 at the first detection bit 18;

[0171] S5220. Determine whether T1 is equal to T0;

[0172] If so, then proceed with normal water collection;

[0173] If not, then PID control is applied to the third flow control element 33.

[0174] In step S5210, the TDS value T1 of the first detection bit 18 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.

[0175] In step S5220, it is determined whether T1 is equal to T0. When T1 equals T0, the third flow control element 33 remains closed, and the TDS value of the water flowing out from the outlet is equal to T0. When T1 is not equal to T0, PID control is applied to the third flow control element 33 according to the relationship between T1, T2, and T0 to precisely adjust the voltage of the third flow control element 33, thereby adjusting the flow rate of water discharged from the second water collector 32 into the main pipeline 10 until T1 equals T0. This allows the TDS value of the water flowing out from the outlet to be precisely controlled at T0, improving the accuracy of the mineral content of the water received by the user and meeting user needs.

[0176] like Figure 2 and Figure 5 As shown, when T1 is not equal to T0, there are two possibilities: T1 is greater than T0 or less than T0. Therefore, in step S5220, PID control is performed on the third flow control element 33, which also includes the following steps:

[0177] S5221. When T1 is less than T0, determine whether the operating voltage of the third current control device 33 has reached the upper limit;

[0178] If so, the operating voltage of the first current control device 13 is reduced, and step S5220 is executed repeatedly.

[0179] If not, the operating voltage of the third current control device 33 is increased, and step S5220 is executed repeatedly.

[0180] S5222. When T1 is greater than T0, determine whether the operating voltage of the third current control device 33 has reached the lower limit;

[0181] If so, maintain the lower limit voltage of the third current control device 33 and indicate that the TDS value is lower than T0;

[0182] If not, then lower the operating voltage of the third current control device 33 and repeat step S5220.

[0183] In step S5221, when T1 is less than T0, the mineral content in the water needs to be increased. It is determined whether the operating voltage of the third flow control device 33 has reached its upper limit. If the operating voltage of the third flow control device 33 has not reached its upper limit, the operating voltage of the third flow control device 33 is increased to increase the flow rate of water from the second water collector 32 to the main pipeline 10, thereby increasing the mineral content of the water flowing out from the outlet. After the increase, step S5220 is executed repeatedly, that is, the relationship between T1 and T0 of the first detection bit 18 is checked again until T1 = T0. If the operating voltage of the third flow control device 33 has reached its upper limit, the operating voltage of the first flow control device 13 is decreased to reduce the flow rate of water in the main pipeline 10, thereby increasing the mineral content of the water flowing out from the outlet. After the decrease, step S5120 is executed repeatedly, that is, the relationship between T1 and T0 of the first detection bit 18 is checked again until T1 = T0, to meet the user's needs.

[0184] Alternatively, since the operating voltage of the third flow control element 33 is not changed during the step of lowering the operating voltage of the first flow control element 13, the relationship between T1 and T0 of the first detection bit 18 can be checked again after the lowering. If T1 equals T0, water is drawn normally; if T1 is still greater than T0, the operating voltage of the first flow control element 13 is lowered again until T1 = T0. That is, the step of determining whether the operating voltage of the third flow control element 33 has reached the upper limit can be omitted.

[0185] In step S5222, when T1 is greater than T0, the mineral content in the water needs to be reduced. Since the operating voltage of the first flow control element 13 has reached its upper limit, it is necessary to determine whether the operating voltage of the third flow control element 33 has reached its lower limit. If the operating voltage of the third flow control element 33 has reached its lower limit, the mineral content in the water cannot be reduced further. The water production system maintains the lower limit voltage of the third flow control element 33 to maintain the current mineral content in the water and prompts the user that the TDS value of the water taken at this time is lower than T0. If the operating voltage of the third flow control element 33 has not reached its lower limit, the operating voltage of the third flow control element 33 is lowered to reduce the flow rate of water from the second water collector 32 to the main pipeline 10, thereby reducing the mineral content of the water flowing out from the outlet. After the lowering, step S5220 is executed repeatedly, that is, the relationship between T1 and T0 of the first detection bit 18 is checked again until T1 = T0.

[0186] Alternatively, when the operating voltage of the third flow control element 33 reaches its lower limit, the second flow control element 23 can also be activated and subjected to PID control. This allows the high TDS water in the first water collector 22 to flow into the main pipe 10 and mix with the water in the main pipe 10 whose TDS value is higher than T0. By using PID control on the second flow control element 23, the TDS value of the water flowing out from the outlet can be precisely controlled at T0 to meet user needs.

[0187] like Figure 2 As shown, since the users of the same water purification product are basically fixed, the mineral content requirements of the water are also basically fixed for the same user. Therefore, in step S5000, each time the user takes water normally, the steps also include: recording the working voltage of the second flow control element 23 as the first preset voltage for the next water intake, and recording the working voltage of the third flow control element 33 as the second preset voltage for the next water intake. Here, "normal water intake" refers to the situation where the water production system does not indicate to the user that the TDS value of the water being taken is lower or higher than T0.

[0188] When water is drawn again, if T2 and T0 remain unchanged, adjusting the second flow control element 23 to operate at the first preset voltage and the third flow control element 33 to operate at the second preset voltage can ensure that the mineral content of the water flowing out of the outlet meets the user's needs, that is, T1 equals T0. There is no need to perform PID control on the first flow control element 13, the second flow control element 23 and the third flow control element 33, thereby improving the working efficiency of the water production system.

[0189] 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.

[0190] 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 method for adjusting the mineral content of water production, characterized in that, This system is applied to a water production system, which includes a main pipeline (10), a first branch pipeline (20), and a second branch pipeline (30). The main pipeline (10) is sequentially provided with an inlet, a first flow control element (13), a filter assembly (14), a second detection position (16), and an outlet. The filter assembly (14) includes a membrane filter element (141). The inlet and outlet of the first branch pipeline (20) are both located between the second detection position (16) and the outlet. The first branch pipeline (20) is sequentially provided with a first water collector (22) and a second flow control element (23). The first water collector (22) is used to collect water with low TDS values ​​from the main pipeline (10) after being filtered by the membrane filter element (141). The second branch pipeline (30) has a... The inlet and outlet are both located between the outlet of the first branch pipe (20) and the outlet end. The second branch pipe (30) is provided with a second water collector (32) and a third flow control device (33) in sequence. The main pipe (10) is also provided with a second switch valve (17), which is located between the inlet and outlet of the second branch pipe (30). The first branch pipe (20) is also provided with a third switch valve (21) located before the first water collector (22), and the second branch pipe (30) is also provided with a fourth switch valve (31) located before the second water collector (32). The second water collector (32) is used to collect water with high TDS value that has been left to stand in the main pipe (10). The water production method includes the following steps: Obtain the preset TDS value T0 of the water sample; Adjust to water intake mode: Adjust the first flow control element (13) to the maximum voltage operation, open the second switch valve (17), and close the third switch valve (21) and the fourth switch valve (31). The TDS value T2 at the second detection bit (16) is obtained in real time; Determine if T2 is equal to T0; If so, then proceed with normal water collection; If not, then determine whether T2 is greater than T0; If so, the second flow control element (23) is adjusted to the first preset voltage to work, and the low TDS water in the first water collector (22) flows into the main pipeline (10) and mixes with the high TDS water in the main pipeline (10). The second flow control element (23) is PID controlled according to the relationship between T2 and T0 so that the mixed water can be maintained at T0. If not, the third flow control element (33) is adjusted to the second preset voltage. The high TDS water in the second water collector (32) flows into the main pipeline (10) and mixes with the low TDS water in the main pipeline (10). The third flow control element (33) is PID controlled according to the relationship between T2 and T0 so that the mixed water can be maintained at T0.

2. The water production method according to claim 1, characterized in that, The first water collector (22) is equipped with a first liquid level detection element (221); the water production method further includes the following steps: Preset the conditions for water collection by the first water collector (22): The first liquid level in the first water collector (22) detected by the first liquid level detection device (221) is acquired in real time. If the first liquid level is lower than the preset maximum liquid level and the water collection time is greater than the first preset time t1, the second switch valve (17) and the fourth switch valve (31) are closed, the third switch valve (21) is opened, and the first flow control device (13) is activated. The first water collector (22) collects water until the liquid level is equal to the preset maximum liquid level; and / or, The first water collector (22) is provided with a first liquid level detection element (221), and the filter assembly (14) includes a third detection position (143) located after the membrane filter element (141); the water production method further includes the following steps: Preset the conditions for water collection by the first water collector (22): The first liquid level in the first water collector (22) detected by the first liquid level detection device (221) is obtained in real time. The TDS value T3 at the third detection position (143) is obtained. If the first liquid level is lower than the preset maximum liquid level and T3 is less than or equal to the preset low TDS value T10, the second switch valve (17) and the fourth switch valve (31) are closed, the third switch valve (21) is opened, and the first flow control device (13) is started. The first water collector (22) collects water until the first liquid level is equal to the preset maximum liquid level.

3. The water production method according to claim 1, characterized in that, The filter assembly (14) includes a third detection position (143) located after the membrane filter element (141), and the water production system further includes a second drain pipe (60), on which a fifth flow control element (61) is provided; the water production method further includes the following steps: Preset the conditions for water collection by the second water collector (32): The TDS value T3 at the third detection position (143) is obtained. If T3 is greater than or equal to the preset high TDS value T20, the second switch valve (17) and the third switch valve (21) are closed, the fourth switch valve (31) is opened, and the first flow control device (13) is started. The second water collector (32) collects water until T3 is less than the preset high TDS value T20.

4. The water production method according to claim 3, characterized in that, The second water collector (32) is equipped with a second liquid level detection element (321); the step of setting the conditions for water collection in the second water collector (32) also includes the step of: The second liquid level in the second water collector (32) detected by the second liquid level detection device (321) is obtained in real time. 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 is equal to the preset maximum liquid level.

5. The water production method according to claim 1, characterized in that, The main pipeline (10) is also provided with a first detection position (18); in the step described above, if the second current control element (23) is adjusted to operate at the first preset voltage, and PID control is performed on the second current control element (23), the following steps are also included: The value T1 of TDS at the first detection bit (18) is obtained in real time; Determine if T1 is equal to T0; If so, then proceed with normal water collection; If not, then the second flow control element (23) is subjected to PID control.

6. The water production method according to claim 5, characterized in that, If not, then the PID control of the second flow control element (23) further includes the following steps: When T1 is greater than T0, determine whether the working voltage of the second current control device (23) has reached the upper limit; If so, then lower the operating voltage of the first current control device (13) and repeatedly execute the step of determining whether T1 is equal to T0; If not, the operating voltage of the second current control device (23) is increased, and the step of determining whether T1 is equal to T0 is repeated. When T1 is less than T0, determine whether the working voltage of the second current control device (23) has reached the lower limit; If so, the lower limit voltage of the second current control device (23) is maintained and the TDS value is indicated as being lower than T0; or, if so, the third current control device (33) is started and PID control is performed on the third current control device (33); If not, then lower the operating voltage of the second current control device (23) and repeatedly execute the step of determining whether T1 is equal to T0.

7. The water production method according to claim 1, characterized in that, The main pipeline (10) is also provided with a first detection position (18); in the step of if no, the third current control device (33) is adjusted to the second preset voltage and PID control is performed on the third current control device (33), the following steps are also included: The value T1 of TDS at the first detection bit (18) is obtained in real time; Determine if T1 is equal to T0; If so, then proceed with normal water collection; If not, then the third flow control element (33) is subjected to PID control.

8. The water production method according to claim 7, characterized in that, If not, then the PID control of the third flow control element (33) further includes the following steps: When T1 is less than T0, determine whether the working voltage of the third current control device (33) has reached the upper limit; If so, then lower the operating voltage of the first current control device (13) and repeatedly execute the step of determining whether T1 is equal to T0; If not, the operating voltage of the third current control device (33) is increased, and the step of determining whether T1 is equal to T0 is repeated. When T1 is greater than T0, determine whether the working voltage of the third current control device (33) has reached the lower limit; If so, the lower limit voltage of the third current control device (33) is maintained and the TDS value is indicated as being lower than T0; or, if so, the second current control device (23) is started and PID control is performed on the second current control device (23); If not, then lower the operating voltage of the third current control device (33) and repeatedly execute the step of determining whether T1 is equal to T0.

9. The water production method according to claim 1, characterized in that, The water production system further includes a first drainage pipe (50) and a second drainage pipe (60), the first drainage pipe being provided with a fourth flow control element (51), and the second drainage pipe (60) being provided with a fifth flow control element (61); before the step of adjusting to the water intake mode, the system further includes the following steps: Pre-set drainage conditions for the first water collector (22) and the second water collector (32): Calculate the time interval t3 between the last water intake and the current water intake. If t3 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 drain the water from the first water collector (22) and the second water collector (32).

10. The water production method according to claim 1, characterized in that, The first water collector (22) is configured as a water tank, and a first liquid level detection element (221) is provided inside the first water collector (22); and / or, The second water collector (32) is configured as a water tank, and the second water collector (32) is provided with a second liquid level detection element (321).

11. The water production method according to claim 1, characterized in that, The main pipeline (10) is also provided with a second filter element (15) located between the filter assembly (14) and the second detection position (16). The filter assembly (14) further includes a filter chamber (142), the membrane filter element (141) is disposed in the filter chamber (142) and the filter chamber (142) is divided into a raw water chamber (1421) that communicates with the first flow control element (13) and a purified water chamber (1422) that communicates with the water outlet. A third detection position (143) is provided in the purified water chamber (1422).

12. The water production method according to claim 1, characterized in that, The main pipeline (10) is also provided with a first detection position (18), which is located between the outlet of the second branch pipeline (30) and the water outlet.

13. The water production method according to claim 1, characterized in that, The water production system also includes a third branch pipe (40) located after the membrane filter (141), and a fifth switch valve (41) is provided on the third branch pipe (40). The water production system further includes a first drainage pipe (50), the inlet and outlet of which are connected to the first water collector (22) and the third branch pipe (40) respectively, and the outlet of the first drainage pipe (50) is located after the fifth switch valve (41). A fourth flow control element (51) is provided on the first drainage pipe (50); and / or, The water production system also includes a second drainage pipe (60), the inlet and outlet of which are connected to the second water collector (32) and the third branch pipe (40) respectively, and the outlet of the second drainage pipe (60) is located after the fifth switch valve (41). A fifth flow control element (61) is provided on the second drainage pipe (60).

14. The water production method according to claim 1, characterized in that, The main pipeline (10) is also provided with a first switching valve (12), which is located between the water inlet and the first flow control element (13).

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