A water purification system and control method capable of adjusting TDS value of outlet water

Abstract

The application relates to a water purification system capable of adjusting the TDS value of output water and a control method, and relates to the technical field of water purification equipment. The application specifically comprises a water delivery pipeline for delivering tap water, a pretreatment filter element for performing pretreatment, a reverse osmosis filter element for performing reverse osmosis filtration, a first connecting pipeline for connecting the pretreatment filter element and the reverse osmosis filter element, and a booster pump arranged on the first connecting pipeline; the pretreatment filter element performs pretreatment on the tap water to form pretreated water, and the reverse osmosis filter element is provided with a purified water adjusting assembly. The reverse osmosis filter element is provided with the purified water adjusting assembly, the purified water adjusting assembly can mix the pretreated water input into the reverse osmosis filter element with pure water formed after the reverse osmosis filter element is filtered, thereby forming mixed water, the reverse osmosis filter element outputs the formed mixed water, and the TDS value of the output water is adjusted, the needs of different regions and different groups of people are met, and the structure is simple and easy to implement.

Description

Technical Field

[0001] This invention relates to the field of water purification equipment technology, and in particular to a water purification system and control method with adjustable TDS value of effluent. Background Technology

[0002] Existing water purification technologies are mainly used in the direct drinking water sector, primarily employing ultrafiltration to obtain mineral water or reverse osmosis to obtain purified water. Both technologies have certain drawbacks. Ultrafiltration-produced mineral water, because it cannot remove mineral elements, can lead to problems such as scale buildup in kettles and a dry taste; in some areas with high water hardness, long-term consumption can even cause kidney stones and other diseases. Reverse osmosis-produced purified water has extremely low mineral ion content; although it doesn't produce scale after heating, long-term consumption can easily lead to insufficient mineral intake, causing calcium deficiency, osteoporosis, and other diseases.

[0003] In other words, existing water purification equipment can only produce water with either a high or low TDS (Total Dissolved Solids) value. However, for human health, the healthiest water should contain an appropriate amount of minerals, not too much or too little. Different people have different needs for minerals in their water, and current water purification equipment cannot flexibly change the mineral content (TDS) of the output water. Therefore, it cannot meet the needs of different regions and different populations. Summary of the Invention

[0004] The purpose of this invention is to address the shortcomings of the prior art by providing a water purification system and control method with adjustable TDS value of the effluent. This system can adjust the TDS value of the effluent to meet the needs of different regions and populations, and it is simple in structure and easy to implement.

[0005] This invention proposes a water purification system with adjustable TDS value for effluent, comprising a water delivery pipe for conveying tap water, a pretreatment filter cartridge for pre-filtration, a reverse osmosis filter cartridge for reverse osmosis filtration, a first connecting pipe for connecting the pretreatment filter cartridge and the reverse osmosis filter cartridge, and a booster pump disposed on the first connecting pipe; the water delivery pipe is connected to the pretreatment filter cartridge, the pretreatment filter cartridge pre-filters the tap water to form pre-filtered water, the booster pump drives the pre-filtered water to flow in the first connecting pipe, and the reverse osmosis filter cartridge is provided with a water purification adjustment component, the water purification adjustment component is used to enable the reverse osmosis filter cartridge to perform reverse osmosis filtration on the pre-filtered water to form mixed water.

[0006] Furthermore, the water purification system also includes a post-treatment filter cartridge for treating the mixed water, a second connecting pipe for connecting the reverse osmosis filter cartridge and the post-treatment filter cartridge, and a first water supply pipe connected to the post-treatment filter cartridge. The post-treatment filter cartridge treats the mixed water to form purified water, and the first water supply pipe is used to output the purified water.

[0007] Furthermore, the water purification system also includes a first TDS probe disposed on the first connecting pipe, a flow meter disposed on the second connecting pipe, and a second TDS probe disposed on the first water supply pipe. The first TDS probe is used to detect the TDS value of the pre-filtered water, the flow meter is used to detect the flow rate of the mixed water, and the second TDS probe is used to detect the TDS value of the purified water.

[0008] Furthermore, the reverse osmosis filter element includes a bottle body, an end cap disposed on the bottle body, an inlet pipe disposed on the end cap, and an outlet pipe disposed on the end cap. The end cap is used to seal the bottle body. The bottle body is provided with a pre-filtered water area for storing pre-filtered water and a pure water area for storing pure water. The inlet pipe connects the first connecting pipe to the pre-filtered water area, and the outlet pipe connects the pure water area to the second connecting pipe. The water purification regulating component is connected in parallel between the inlet pipe and the outlet pipe.

[0009] Furthermore, the reverse osmosis filter element also includes a filter element seat disposed on the bottle body, and the water purification regulating assembly includes a mixing water pipe that connects the inlet pipe and the outlet pipe, and a water purification regulating valve disposed on the mixing water pipe. The water purification regulating valve is used to control the opening or closing of the mixing water pipe, and the water purification regulating valve is fixedly installed on the filter element seat.

[0010] Furthermore, the water purification regulating valve is provided with a throttling orifice. When the water purification regulating valve is energized, the throttling orifice opens, and the pre-filtered water transported by the inlet pipe flows from the throttling orifice to the outlet pipe. When the water purification regulating valve is de-energized, the throttling orifice closes, and the inlet pipe transports the pre-filtered water to the pre-filtered water zone.

[0011] Furthermore, the reverse osmosis filter element also includes a concentrate pipe, and the bottle body is also provided with a concentrate zone. The concentrate pipe is connected to the concentrate zone, the concentrate zone is used to store the concentrate generated during reverse osmosis filtration, and the concentrate pipe is used to output the concentrate from the concentrate zone.

[0012] Furthermore, the water purification system also includes a second water supply pipe connected to the concentrate pipe, the second water supply pipe being used to output the concentrate.

[0013] Furthermore, the reverse osmosis filter element also includes a central tube disposed in the bottle body and a reverse osmosis membrane disposed in the bottle body. The reverse osmosis membrane surrounds the outside of the central tube. The pure water zone is formed inside the central tube, the pre-filtered water zone is formed in the reverse osmosis membrane, and the concentrated water zone is formed between the reverse osmosis membrane and the inner wall of the bottle body.

[0014] The present invention also provides a method for controlling the adjustable TDS value of effluent, applied to the above-mentioned water purification system with adjustable effluent TDS value, the method comprising:

[0015] Receive an adjustment instruction for the effluent TDS value, and determine the target effluent TDS value based on the adjustment instruction for the effluent TDS value;

[0016] Based on the target effluent TDS value, the first effluent TDS value in the first mode, the second effluent TDS value in the second mode, the first effluent flow rate in the first mode, and the second effluent flow rate in the second mode, calculate the first working time in the first mode and the second working time in the second mode. The first mode is the working mode in which the reverse osmosis filter cartridge outputs pure water, and the second mode is the working mode in which the reverse osmosis filter cartridge outputs mixed water.

[0017] The current working mode is controlled to alternate between a first mode and a second mode, so that the single working time of the first mode is the first working time and the single working time of the second mode is the second working time.

[0018] Furthermore, the first mode is a working mode in which the inlet solenoid valve and the purified water solenoid valve are energized, while the purified water regulating valve and the concentrated water solenoid valve are de-energized.

[0019] Furthermore, the second mode is a working mode in which the inlet solenoid valve, the purified water regulating valve, and the purified water solenoid valve are energized, while the concentrate solenoid valve is de-energized.

[0020] Furthermore, the first effluent TDS value is the TDS value detected by the second TDS probe in the first mode, the second effluent TDS value is the TDS value detected by the second TDS probe in the second mode, the first effluent flow rate is the flow rate detected by the flow meter in the first mode, and the second effluent flow rate is the flow rate detected by the flow meter in the second mode.

[0021] The water purification system and control method with adjustable TDS value of effluent of the present invention have the following beneficial effects:

[0022] (1) The reverse osmosis filter cartridge of this water purification system is equipped with a water purification adjustment component. The water purification adjustment component can mix the pre-filtered water input to the reverse osmosis filter cartridge with the pure water formed after filtration by the reverse osmosis filter cartridge to form mixed water. The reverse osmosis filter cartridge outputs the mixed water, thereby adjusting the TDS value of the effluent to meet the needs of different regions and different groups of people. It has a simple structure and is easy to implement.

[0023] (2) This water purification system also includes a post-treatment filter cartridge, a second connecting pipe and a first water supply pipe. The post-treatment filter cartridge is connected to the reverse osmosis filter cartridge through the second connecting pipe, so that the mixed water output from the reverse osmosis filter cartridge is input into the post-treatment filter cartridge. The post-treatment filter cartridge further filters the mixed water to form purified water. It can adjust the TDS value of the water output from the reverse osmosis filter cartridge to meet the needs of different regions and different groups of people, and also protect the health of users.

[0024] (3) This water purification system also includes a first TDS probe, a flow meter and a second TDS probe. The first TDS probe is used to detect the TDS value of the pre-filtered water flowing through the first pipe, the flow meter is used to detect the flow rate of the mixed water flowing through the second connecting pipe, and the second TDS probe is used to detect the TDS value of the purified water flowing through the first water supply pipe. Thus, the starting and stopping of the water purification adjustment component in the reverse osmosis filter element are controlled by the values ​​detected by the first TDS probe, the flow meter and the second TDS probe, thereby accurately adjusting the TDS value of the water output from this water purification system.

[0025] (4) The water purification regulating component of this water purification system is connected in parallel between the inlet pipe and the outlet pipe. The water purification regulating component can realize the connection or closure of the inlet pipe and the outlet pipe, thereby adjusting the TDS value of the water output of the water purification system to meet the needs of different regions and different groups of people. It has a simple structure and is easy to implement.

[0026] (5) The water purification system includes a mixing pipe that connects the inlet pipe and the outlet pipe, and a water purification regulating valve installed on the mixing pipe. The water purification regulating valve is used to control the opening or closing of the mixing pipe, thereby adjusting the TDS value of the water discharged from the water purification system, so as to meet the needs of different regions and different groups of people. It has a simple structure and is easy to implement.

[0027] (6) The water purification regulating valve of this water purification system is equipped with a throttling orifice. When the water purification regulating valve is powered on, the throttling orifice opens, and the pre-filtered water transported by the inlet pipe flows from the throttling orifice to the outlet pipe. When the water purification regulating valve is powered off, the throttling orifice closes. Thus, the pre-filtered water and pure water can be mixed through the throttling orifice to adjust the TDS value of the water output of the water purification system. The structure is simple and easy to implement.

[0028] (7) The reverse osmosis filter element of this water purification system also includes a concentrate pipe. A concentrate zone is also set in the bottle. The concentrate zone stores the concentrate formed by reverse osmosis filtration. The concentrate pipe is connected to the concentrate zone, so that the concentrate stored in the concentrate zone can be discharged in time through the concentrate pipe, thereby preventing the concentrate from being over-compressed, which could cause the filter element or water purifier to become clogged, and ensuring the service life of the filter element and water purifier.

[0029] (8) The reverse osmosis filter element of this water purification system also includes a central tube and a reverse osmosis membrane. The central tube is located in the middle of the bottle body, and the reverse osmosis membrane is surrounded on the outside of the central tube. The space inside the bottle body is divided into a pre-filtered water area, a pure water area and a concentrated water area through the central tube and the reverse osmosis membrane, so that the pre-filtered water entering the pre-filtered water area can be filtered by the reverse osmosis membrane. The pure water is stored in the pure water area inside the central tube, and the concentrated water is stored in the concentrated water area between the reverse osmosis membrane and the inner wall of the bottle body.

[0030] (9) This control method can adjust the TDS value of the water purifier to any value between the TDS value of pure water and the TDS value of mixed water by controlling the single working time of the water purification system switching between the first mode and the second mode, thereby further meeting the different water needs of users and improving the user experience. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention. In these drawings, similar reference numerals are used to denote similar elements.

[0032] Figure 1 This is a schematic diagram of a water purification system and control method with adjustable effluent TDS value according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the structure of a reverse osmosis filter element in a water purification system and control method with adjustable effluent TDS value according to an embodiment of the present invention;

[0034] Figure 3 This is a partial structural diagram of a reverse osmosis filter element in a water purification system and control method with adjustable effluent TDS value according to an embodiment of the present invention.

[0035] In the diagram: 1. Water delivery pipe; 2. Pretreatment filter element; 3. Reverse osmosis filter element; 31. Water purification regulating component; 311. Mixing water pipe; 312. Water purification regulating valve; 32. Bottle body; 321. Pre-filtered water zone; 322. Pure water zone; 323. Concentrated water zone; 324. Central pipe; 325. Reverse osmosis membrane; 326. First water-blocking rib; 327. Second water-blocking rib; 33. End cap; 331. Inlet channel; 332. Outlet. Channel; 333, Concentrate Channel; 34, Inlet Pipe; 35, Outlet Pipe; 36, Filter Cartridge Holder; 37, Concentrate Pipe; 4, First Connecting Pipe; 5, Booster Pump; 6, Post-treatment Filter Cartridge; 7, Second Connecting Pipe; 8, First Water Delivery Pipe; 9, First TDS Probe; 10, Flow Meter; 11, Second TDS Probe; 12, Second Water Delivery Pipe; 13, Inlet Solenoid Valve; 14, Purified Water Solenoid Valve; 15, Concentrate Solenoid Valve. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1-3 An embodiment of the present invention provides a water purification system with adjustable TDS value of effluent, comprising a water supply pipe 1 for conveying tap water, a pretreatment filter element 2 for pre-filtration, a reverse osmosis filter element 3 for reverse osmosis filtration, a first connecting pipe 4 for connecting the pretreatment filter element 2 and the reverse osmosis filter element 3, and a booster pump 5 disposed on the first connecting pipe 4; the water supply pipe 1 is connected to the pretreatment filter element 2, the pretreatment filter element 2 pre-filters the tap water to form pre-filtered water, the booster pump 5 drives the pre-filtered water to flow in the first connecting pipe 4, and the reverse osmosis filter element 3 is provided with a water purification adjustment component 31, which is used to enable the reverse osmosis filter element 3 to perform reverse osmosis filtration on the pre-filtered water to form mixed water.

[0038] In this application, the water purification system includes a water supply pipe 1, a pretreatment filter element 2, a reverse osmosis filter element 3, a first connecting pipe 4, and a booster pump 5. The water supply pipe 1 is connected to the pretreatment filter element 2, and tap water is supplied to the pretreatment filter element 2 through the water supply pipe 1. The pretreatment filter element 2 pre-filters the tap water to form pre-filtered water. The pretreatment filter element 2 and the reverse osmosis filter element 3 are connected through the first connecting pipe 4, so that the pre-filtered water formed by the pretreatment filter element 2 is transported to the reverse osmosis filter element 3 through the first connecting pipe 4.

[0039] A booster pump 5 is installed on the first connecting pipe 4. The booster pump 5 pressurizes the pre-filtered water, driving it to flow through the first connecting pipe 4 more quickly into the reverse osmosis filter element 3. The reverse osmosis filter element 3 performs reverse osmosis filtration on the pre-filtered water, thus producing pure water. Because a water purification regulating component 31 is installed in the reverse osmosis filter element 3, the pre-filtered water input to the reverse osmosis filter element 3 mixes with the pure water produced after filtration by the reverse osmosis filter element 3, forming mixed water. The reverse osmosis filter element 3 outputs this mixed water, thereby regulating the TDS value of the purified water system output. This meets the needs of different regions and different populations, and the structure is simple and easy to implement.

[0040] Example 1:

[0041] In this application, the pre-treatment filter cartridge 2 can be an ultrafiltration filter cartridge. The pre-filtered water formed after pre-filtration by the pre-treatment filter cartridge 2 essentially removes harmful substances such as bacteria, rust, and colloids from the water, while retaining the original trace mineral elements. Because the pre-treatment filter cartridge 2 cannot remove mineral elements, pre-filtered water may cause problems such as scale buildup in kettles and a dry taste. In some high-hardness areas, long-term consumption may even lead to diseases such as kidney stones.

[0042] The pure water produced after reverse osmosis filtration through the reverse osmosis filter cartridge 3 removes almost all impurities, including minerals. Because pure water contains very few mineral ions, although it doesn't produce limescale after heating, long-term consumption can lead to insufficient mineral intake, causing calcium deficiency, osteoporosis, and other diseases. Therefore, neither pre-filtered water nor pure water is suitable for direct consumption.

[0043] In this application, by using the water purification adjustment component 31 installed in the reverse osmosis filter element 3, the pre-filtered water input to the reverse osmosis filter element 3 can be mixed with the pure water formed after filtration by the reverse osmosis filter element 3 to form mixed water. The reverse osmosis filter element 3 then outputs the mixed water, thereby adjusting the TDS value of the water output from the water purification system to meet the needs of different regions and different groups of people. The structure is simple and easy to implement.

[0044] Example 2:

[0045] In this embodiment, the water purification system further includes a post-treatment filter cartridge 6 for treating the mixed water, a second connecting pipe 7 for connecting the reverse osmosis filter cartridge 3 and the post-treatment filter cartridge 6, and a first water supply pipe 8 connected to the post-treatment filter cartridge 6. The post-treatment filter cartridge 6 treats the mixed water to form purified water, and the first water supply pipe 8 is used to output the purified water.

[0046] In this application, the water purification system further includes a post-treatment filter element 6, a second connecting pipe 7, and a first water supply pipe 8. The post-treatment filter element 6 is connected to the reverse osmosis filter element 3 via the second connecting pipe 7, so that the mixed water output from the reverse osmosis filter element 3 is input into the post-treatment filter element 6. The post-treatment filter element 6 further filters the mixed water to form purified water. The first water supply pipe 8 is connected to the post-treatment filter element 6, so that the purified water formed after filtration by the post-treatment filter element 6 is output through the first water supply pipe 8 for user use.

[0047] In this embodiment, the mixed water output from the reverse osmosis filter 3 undergoes further filtration through the post-treatment filter 6 before being output through the first water supply pipe 8 for user use. Therefore, in this embodiment, the pre-treatment filter 2 can be a PP cotton and activated carbon filter. The pre-filtered water formed after pre-filtration by the pre-treatment filter 2 is water with large particulate impurities, odors, residual chlorine, and some organic matter removed.

[0048] The pure water produced after reverse osmosis filtration by reverse osmosis filter element 3 is water in which almost all impurities, including mineral elements, have been removed. The pre-filtered water input to reverse osmosis filter element 3 is mixed with the pure water produced after filtration by reverse osmosis filter element 3 through the water purification regulating component 31 installed in reverse osmosis filter element 3, forming mixed water.

[0049] The post-treatment filter cartridge 6 can be an ultrafiltration filter cartridge. The post-treatment filter cartridge 6 further filters the mixed water, removing harmful substances such as bacteria, rust, and colloids, while retaining the original trace mineral elements, thus forming purified water. This not only adjusts the TDS value of the water output from the water purification system to meet the needs of different regions and different groups of people, but also protects the health of users.

[0050] In this embodiment, the water purification system further includes a first TDS probe 9 disposed on the first connecting pipe 4, a flow meter 10 disposed on the second connecting pipe 7, and a second TDS probe 11 disposed on the first water supply pipe 8. The first TDS probe 9 is used to detect the TDS value of the pre-filtered water, the flow meter 10 is used to detect the flow rate of the mixed water, and the second TDS probe 11 is used to detect the TDS value of the purified water.

[0051] In this application, the water purification system also includes a first TDS probe 9, a flow meter 10, and a second TDS probe 11. The first TDS probe 9 is installed on the first connecting pipe 4 to detect the TDS value of the pre-filtered water flowing through the first connecting pipe 4. The flow meter 10 is installed on the second connecting pipe 7 to detect the flow rate of the mixed water flowing through the second connecting pipe 7. The second TDS probe 11 is installed on the first water supply pipe 8 to detect the TDS value of the purified water flowing through the first water supply pipe 8. Thus, the starting and stopping of the water purification adjustment component 31 in the reverse osmosis filter element 3 is controlled by the values ​​detected by the first TDS probe 9, the flow meter 10, and the second TDS probe 11, thereby precisely adjusting the TDS value of the water output from this water purification system.

[0052] In this embodiment, the reverse osmosis filter element 3 includes a bottle body 32, an end cap 33 disposed on the bottle body 32, an inlet pipe 34 disposed on the end cap 33, and an outlet pipe 35 disposed on the end cap 33. The end cap 33 is used to seal the bottle body 32. The bottle body 32 is provided with a pre-filtered water area 321 for storing pre-filtered water and a pure water area 322 for storing pure water. The inlet pipe 34 connects the first connecting pipe 4 to the pre-filtered water area 321, and the outlet pipe 35 connects the pure water area 322 to the second connecting pipe 7. The water purification regulating component 31 is connected in parallel between the inlet pipe 34 and the outlet pipe 35.

[0053] In this application, the reverse osmosis filter element 3 includes a bottle body 32, an end cap 33, an inlet pipe 34, and an outlet pipe 35. The end cap 33 is disposed on the bottle body 32 to seal the bottle body 32. Both the inlet pipe 34 and the outlet pipe 35 are disposed on the end cap 33. A pre-filtered water zone 321 and a pure water zone 322 are provided in the bottle body 32. The inlet pipe 34 connects the first connecting pipe 4 to the pre-filtered water zone 321, and the outlet pipe 35 connects the pure water zone 322 to the second connecting pipe 7. A water purification regulating component 31 is connected in parallel between the inlet pipe 34 and the outlet pipe 35.

[0054] When the water purification regulating component 31 is closed, the pre-filtered water supplied by the first connecting pipe 4 is transported to the pre-filtered water zone 321 for storage via the inlet pipe 34. The pre-filtered water stored in the pre-filtered water zone 321 undergoes reverse osmosis filtration to form pure water, which is then transported to the pure water zone 322, where the pure water after reverse osmosis filtration is stored. The pure water stored in the pure water zone 322 is transported to the second connecting pipe 7 via the outlet pipe 35, thereby transporting the pure water to the post-treatment filter element 6 via the second connecting pipe 7.

[0055] When the water purification regulating component 31 is activated, the inlet pipe 34 and the outlet pipe 35 can be connected, so that the pre-filtered water transported by the first connecting pipe 4 can be transported to the outlet pipe 35 through the inlet pipe 34 and the water purification regulating component 31, and mixed with the pure water transported in the outlet pipe 35 to form mixed water. Then, the outlet pipe 35 inputs the mixed water to the second connecting pipe 7, and the mixed water is transported to the post-treatment filter element 6 through the second connecting pipe 7.

[0056] In this embodiment, the reverse osmosis filter element 3 further includes a filter element seat 36 disposed on the bottle body 32. The water purification regulating assembly 31 includes a mixing water pipe 311 connecting the inlet pipe 34 and the outlet pipe 35, and a water purification regulating valve 312 disposed on the mixing water pipe 311. The water purification regulating valve 312 is used to control the opening or closing of the mixing water pipe 311, and the water purification regulating valve 312 is fixedly installed on the filter element seat 36. In this application, the water purification regulating assembly 31 includes a mixing water pipe 311 and a water purification regulating valve 312. One end of the mixing water pipe 311 is connected to the inlet pipe 34, and the other end is connected to the outlet pipe 35, thereby connecting the mixing water pipe 311 in parallel between the inlet pipe 34 and the outlet pipe 35, and realizing the connection between the inlet pipe 34 and the outlet pipe 35 through the mixing water pipe 311.

[0057] A water purification regulating valve 312 is installed on the mixing water pipe 311, and the opening or closing of the mixing water pipe 311 can be controlled by the water purification regulating valve 312. Specifically, in this application, the reverse osmosis filter element 3 also includes a filter element seat 36 installed on the bottle body 32, and the water purification regulating valve 312 can be fixedly installed on the filter element seat 36. When the water purification regulating valve 312 is de-energized, the mixing water pipe 311 is closed, thereby disconnecting the inlet pipe 34 from the outlet pipe 35, so that the inlet pipe 34 transports the pre-filtered water to the pre-filtered water area 321 for storage, to provide a water source for the reverse osmosis filtration in the bottle body 32.

[0058] When the water purification regulating valve 312 is energized, the mixing water pipe 311 is opened, thereby connecting the inlet pipe 34 and the outlet pipe 35 through the mixing water pipe 311. This allows the pre-filtered water transported in the inlet pipe 34 to be transported to the outlet pipe 35 through the mixing water pipe 311, where it mixes with the pure water output from the outlet pipe 35 to form mixed water.

[0059] The mixed water is then transported to the second connecting pipe 7 through the outlet pipe 35. The second connecting pipe 7 inputs the mixed water into the post-treatment filter element 6. After further filtration by the post-treatment filter element 6, purified water is obtained. Finally, the purified water is output through the first water supply pipe 8 for user use, thereby realizing the adjustment of the TDS value of the water output of this water purification system, meeting the needs of different regions and different groups of people. Moreover, the structure is simple and easy to implement.

[0060] Specifically, in this embodiment, the water purification regulating valve 312 is provided with a throttling orifice. When the water purification regulating valve 312 is energized, the throttling orifice opens, allowing the pre-filtered water transported in the inlet pipe 34 to flow out through the throttling orifice and continue to flow in the mixing water pipe 311 to the outlet pipe 35, thereby achieving the mixing of pre-filtered water and pure water and adjusting the TDS value of the water output from the water purification system.

[0061] When the water purification regulating valve 312 is de-energized, the throttling orifice closes, preventing the pre-filtered water transported in the inlet pipe 34 from flowing out of the throttling orifice. This cuts off the mixing water pipe 311, preventing the pre-filtered water from continuing to flow in the mixing water pipe 311 to the outlet pipe 35. Instead, the water flows to the pre-filtered water zone 321 to provide a water source for the reverse osmosis filtration in the bottle body 32.

[0062] In this application, the inlet pipe 34 for supplying pre-filtered water to the bottle 32 and the outlet pipe 35 for outputting pure water from the bottle 32 are typically round pipes. Therefore, in this embodiment, the throttling orifice can be set as a round orifice, so that when the throttling orifice is open, the pre-filtered water supplied through the inlet pipe 34 can flow out of the throttling orifice more effectively and flow through the mixing water pipe 311 to the outlet pipe 35, where it mixes with the pure water in the outlet pipe 35 to adjust the TDS value of the water output from the water purification system.

[0063] However, the pre-filtered water flowing out of the throttling orifice and through the mixing pipe 311 to the outlet pipe 35 needs to be mixed with the pure water transported in the outlet pipe 35 in a certain proportion to ensure that the TDS value of the purified water output from the water purification system meets the preset requirements. Therefore, the diameter of the throttling orifice cannot be too large or too small. In this embodiment, the preferred diameter range of the throttling orifice is 0.3mm to 1.0mm. The specific diameter of the throttling orifice can be determined according to the actual production needs.

[0064] In this embodiment, the reverse osmosis filter element 3 also includes a concentrate pipe 37, and the bottle body 32 is further provided with a concentrate zone 323. The concentrate pipe 37 is connected to the concentrate zone 323, which is used to store the concentrate produced during reverse osmosis filtration. The concentrate pipe 37 is used to output the concentrate from the concentrate zone 323. Because the reverse osmosis filter element 3 performs reverse osmosis filtration on the pre-filtered water, during this process, a portion of the water is completely purified to form pure water, while another portion is concentrated, containing a large amount of impurities and salts, forming concentrate. If the concentrate formed in the reverse osmosis filter element 3 is not treated in time, it may cause excessive concentration, leading to clogging of the filter element or water purifier, affecting the service life of the filter element and water purifier.

[0065] Therefore, in this application, the reverse osmosis filter element 3 also includes a concentrate pipe 37, and a concentrate zone 323 is also provided in the bottle body 32. When the pre-filtered water stored in the pre-filtered water zone 321 undergoes reverse osmosis filtration in the bottle body 32, part of the water forms pure water, and the other part forms concentrate. The pure water is transported to the pure water zone 322 for storage, and the concentrate is transported to the concentrate zone 323 for storage. The concentrate pipe 37 is connected to the concentrate zone 323, so that the concentrate stored in the concentrate zone 323 can be discharged in a timely manner through the concentrate pipe 37, thereby preventing the concentrate from being over-compressed, which could cause the filter element or water purifier to become clogged, and ensuring the service life of the filter element and water purifier.

[0066] Furthermore, in this embodiment, the water purification system also includes a second water supply pipe 12 connected to the concentrated water pipe 37, which is used to output the concentrated water. In this application, the water purification system further includes a second water supply pipe 12 connected to the concentrated water pipe 37, so that the concentrated water output from the concentrated water pipe 37 is discharged through the second water supply pipe 12, thereby preventing excessive compression of the concentrated water and causing blockage of the filter element or water purifier, and ensuring the service life of the filter element and water purifier.

[0067] It is foreseeable that in this application, the first connecting pipe 4 is equipped with an inlet solenoid valve 13, the first water supply pipe 8 is equipped with a purified water solenoid valve 14, and the second water supply pipe 12 is equipped with a concentrated water solenoid valve 15. When the inlet solenoid valve 13 and the purified water solenoid valve 14 are energized, and the purified water regulating valve 312 and the concentrated water solenoid valve 15 are de-energized, the water supply pipe 1 delivers tap water to the pretreatment filter element 2. After the pretreatment filter element 2 pre-filters the tap water, pre-filtered water is formed.

[0068] The pre-filtered water is transported to the reverse osmosis filter element 3 through the first connecting pipe 4. After the reverse osmosis filter element 3 performs reverse osmosis filtration on the pre-filtered water, pure water and concentrated water are formed. The pure water is stored in the pure water zone 322 and the concentrated water is stored in the concentrated water zone 323. The pure water in the pure water zone 322 is transported to the post-treatment filter element 6 through the second connecting pipe 7. After the post-treatment filter element 6 performs further filtration on the pure water, purified water is formed. The purified water is output through the first water supply pipe 8 for user use.

[0069] When the inlet solenoid valve 13, the purified water regulating valve 312, and the purified water solenoid valve 14 are energized, and the concentrate solenoid valve 15 is de-energized, the water supply pipe 1 delivers tap water to the pretreatment filter element 2. The pretreatment filter element 2 pre-filters the tap water to form pre-filtered water. The pre-filtered water is then delivered to the reverse osmosis filter element 3 through the first connecting pipe 4 and mixed with the pure water output from the outlet pipe 35 through the mixing water pipe 311 to form mixed water.

[0070] The mixed water is transported to the post-treatment filter element 6 through the second connecting pipe 7. The post-treatment filter element 6 further filters the mixed water to form purified water. The purified water is output through the first water supply pipe 8 for users. This not only adjusts the TDS value of the water output from the water purification system to meet the needs of different regions and different groups of people, but also protects the health of users.

[0071] When the inlet solenoid valve 13 and the concentrate solenoid valve 15 are energized, and the purified water regulating valve 312 and the purified water solenoid valve 14 are de-energized, the water supply pipe 1 delivers tap water to the pretreatment filter element 2. The pretreatment filter element 2 pre-filters the tap water to form pre-filtered water. The pre-filtered water is then delivered to the reverse osmosis filter element 3 through the first connecting pipe 4. The reverse osmosis filter element 3 performs reverse osmosis filtration on the pre-filtered water to form pure water and concentrate. The pure water is stored in the pure water zone 322, and the concentrate is stored in the concentrate zone 323. The concentrate in the concentrate zone 323 is discharged through the second water supply pipe 12, thereby preventing excessive compression of the concentrate, which could lead to clogging of the filter element or the water purifier, and ensuring the service life of the filter element and the water purifier.

[0072] In this embodiment, the reverse osmosis filter element 3 further includes a central tube 324 disposed in the bottle body 32 and a reverse osmosis membrane 325 disposed in the bottle body 32. The reverse osmosis membrane 325 surrounds the outside of the central tube 324. A pure water zone 322 is formed inside the central tube 324, a pre-filtered water zone 321 is formed in the reverse osmosis membrane 325, and a concentrated water zone 323 is formed between the reverse osmosis membrane 325 and the inner wall of the bottle body 32. In this application, the reverse osmosis filter element 3 further includes a central tube 324 and a reverse osmosis membrane 325, both of which are disposed in the bottle body 32.

[0073] A central tube 324 is positioned in the middle of the bottle body 32, thus forming a pure water zone 322 within the central tube 324. A reverse osmosis membrane 325 surrounds the outside of the central tube 324, thus forming a pre-filtered water zone 321 within the reverse osmosis membrane 325, and a concentrated water zone 323 is formed between the reverse osmosis membrane 325 and the inner wall of the bottle body 32. When the inlet pipe 34 delivers the pre-filtered water to the pre-filtered water zone 321, the reverse osmosis membrane 325 performs further reverse osmosis filtration on the pre-filtered water. During this process, a portion of the water becomes pure water, and the other portion becomes concentrated water. The pure water enters the pure water zone 322 in the central tube 324 for storage, and the concentrated water enters the concentrated water zone 323 between the reverse osmosis membrane 325 and the inner wall of the bottle body 32 for storage.

[0074] It is foreseeable that: multiple filter holes are provided on the wall of the central tube 324; inside the reverse osmosis membrane 325, the pure water filtered by the reverse osmosis membrane 325 can enter the pure water zone 322 in the central tube 324 through the multiple filter holes on the wall of the central tube 324; outside the reverse osmosis membrane 325, the concentrated water formed by the reverse osmosis membrane 325 flows into the concentrated water zone 323 between the reverse osmosis membrane 325 and the inner wall of the bottle 32.

[0075] In this embodiment, the end cap 33 is provided with an inlet channel 331, an outlet channel 332, and a concentrate channel 333. When the end cap 33 closes the bottle body 32, the inlet channel 331 connects the pre-filtered water area 321 in the bottle body 32 to the outside, the outlet channel 332 connects the pure water area 322 in the bottle body 32 to the outside, and the concentrate channel 333 connects the concentrate area 323 in the bottle body 32 to the outside.

[0076] A water inlet connector is provided at the end of the water inlet channel 331 away from the bottle body 32. The water inlet pipe 34 can be connected to the end cap 33 through the water inlet connector, and the water inlet pipe 34 can be connected to the pre-filtered water area 321 in the bottle body 32 through the water inlet channel 331. Thus, pre-filtered water can be delivered to the pre-filtered water area 321 through the water inlet pipe 34 to provide a water source for the reverse osmosis filtration in the bottle body 32.

[0077] A water outlet connector is provided at the end of the water outlet channel 332 away from the bottle body 32. The water outlet connector can connect the water outlet pipe 35 to the end cap 33, and the water outlet channel 332 can connect the water outlet pipe 35 to the pure water area 322 in the bottle body 32, so that the pure water stored in the pure water area 322 can be output through the water outlet pipe 35.

[0078] A concentrate connector is provided at the end of the concentrate channel 333 away from the bottle body 32. The concentrate pipe 37 can be connected to the end cap 33 through the concentrate connector, and the concentrate pipe 37 can be connected to the concentrate area 323 in the bottle body 32 through the concentrate channel 333. Thus, the concentrate stored in the concentrate area 323 can be discharged through the concentrate pipe 37, preventing the concentrate from being over-compressed, which could cause the filter element or water purifier to become clogged, and ensuring the service life of the filter element and water purifier.

[0079] As mentioned in the previous embodiment, the central tube 324 is located in the middle of the bottle body 32, the pure water zone 322 is formed in the central tube 324, the reverse osmosis membrane 325 surrounds the outside of the central tube 324, the pre-filtered water zone 321 is formed in the reverse osmosis membrane 325, and the concentrated water zone 323 is formed between the reverse osmosis membrane 325 and the inner wall of the bottle body 32. Therefore, in the bottle body 32, the pre-filtered water zone 321 is located outside the pure water zone 322, and the concentrated water zone 323 is located outside the pre-filtered water zone 321.

[0080] In this application, the bottle body 32 is also provided with a first water-separating rib 326. When the end cap 33 closes the bottle body 32, the first water-separating rib 326 extends from the top of the central tube 324 to the end cap 33, thereby separating the pure water area 322 from the pre-filtered water area 321 located outside the pure water area 322 through the first water-separating rib 326. This allows the water outlet channel 332 on the end cap 33 to extend into the bottle body 32 through the first water-separating rib 326, so that the pure water stored in the pure water area 322 passes through the area within the first water-separating rib 326 and the water outlet channel 332 in sequence, and is then output from the water outlet pipe 35.

[0081] The bottle body 32 is also provided with a second water-blocking rib 327. When the end cap 33 closes the bottle body 32, the second water-blocking rib 327 extends from the top of the reverse osmosis membrane 325 to the end cap 33, thereby separating the pre-filtered water area 321 from the concentrated water area 323 located outside the pre-filtered water area 321 through the second water-blocking rib 327. This allows the water inlet channel 331 and the concentrated water channel 333 on the end cap 33 to extend into the bottle body 32 through the second water-blocking rib 327. As a result, the pre-filtered water transported by the water inlet pipe 34 flows into the pre-filtered water area 321 after passing through the water inlet channel 331 and the area between the first water-blocking rib 326 and the second water-blocking rib 327 in sequence. The concentrated water stored in the concentrated water area 323 is output from the concentrated water pipe 37 after passing through the area between the second water-blocking rib 327 and the inner wall of the bottle body 32 in sequence and the concentrated water channel 333 in sequence.

[0082] This invention also provides a method for controlling the adjustable TDS value of effluent, applied to the above-mentioned water purification system with adjustable effluent TDS value, the method comprising:

[0083] Receive the adjustment instruction for the effluent TDS value, and determine the target effluent TDS value according to the adjustment instruction;

[0084] Based on the target effluent TDS value, the first effluent TDS value in the first mode, the second effluent TDS value in the second mode, the first effluent flow rate in the first mode, and the second effluent flow rate in the second mode, calculate the first working time in the first mode and the second working time in the second mode. The first mode is the working mode in which the reverse osmosis filter cartridge outputs pure water, and the second mode is the working mode in which the reverse osmosis filter cartridge outputs mixed water.

[0085] The current working mode is controlled to alternate between the first mode and the second mode, so that the single working time of the first mode is the first working time and the single working time of the second mode is the second working time.

[0086] As mentioned in the above embodiments, the reverse osmosis filter cartridge of this water purification system can output pure water and mixed water respectively. Therefore, this water purification system has two working modes: the first mode is the working mode in which the reverse osmosis filter cartridge outputs pure water; the second mode is the working mode in which the reverse osmosis filter cartridge outputs mixed water.

[0087] In this application, when using a water purification device equipped with this water purification system, the user can select the TDS value of the purified water. After the user selects the TDS value, the water purification system receives an adjustment instruction for the TDS value and determines the target TDS value based on the adjustment instruction.

[0088] Then, based on the target effluent TDS value, the first effluent TDS value in the first mode, the second effluent TDS value in the second mode, the first effluent flow rate in the first mode, and the second effluent flow rate in the second mode, calculate the first working time in the first mode and the second working time in the second mode.

[0089] Specifically, it can be determined according to the formula: Where x is the target effluent TDS value; a is the first effluent TDS value under the first mode; u1 is the first effluent flow rate under the first mode; b is the first effluent TDS value under the second mode; u2 is the first effluent flow rate under the second mode; T1 is the first working time; T2 is the second working time; and a≤x≤b<A, where A is the TDS value of the pre-filtered water.

[0090] Finally, based on the calculated first and second working durations, the operating mode of the water purification system is switched between the first and second modes. The first working duration is the single working duration of the water purification system in the first mode, and the second working duration is the single working duration of the water purification system in the second mode. That is, after the working duration in the first mode reaches the first working duration, the water purification system switches to the second mode to work. When the working duration in the second mode reaches the second working duration, this is one working cycle of the water purification system. Within this cycle, the TDS value of the water purified by the system is the target TDS value, thereby enabling the water purification equipment using this system to achieve the TDS value of the water purified by the user.

[0091] Therefore, through the control method of this embodiment, the TDS value of the effluent of this water purification system can be adjusted to any value between the TDS value of pure water and the TDS value of mixed water, thereby further meeting the different water needs of users and improving the user experience.

[0092] Specifically, in this embodiment, the first mode is the working mode in which the inlet solenoid valve 13 and the purified water solenoid valve 14 are energized, while the purified water regulating valve 312 and the concentrated water solenoid valve 15 are de-energized. When the inlet solenoid valve 13 and the purified water solenoid valve 14 are energized, and the purified water regulating valve 312 and the concentrated water solenoid valve 15 are de-energized, the water supply pipe 1 delivers tap water to the pretreatment filter element 2. After the pretreatment filter element 2 pre-filters the tap water, pre-filtered water is formed.

[0093] The pre-filtered water is transported to the reverse osmosis filter element 3 through the first connecting pipe 4. After the reverse osmosis filter element 3 performs reverse osmosis filtration on the pre-filtered water, pure water and concentrated water are formed. The pure water is stored in the pure water zone 322 and the concentrated water is stored in the concentrated water zone 323. The pure water in the pure water zone 322 is transported to the post-treatment filter element 6 through the second connecting pipe 7. After the post-treatment filter element 6 performs further filtration on the pure water, purified water is formed. The purified water is output through the first water supply pipe 8 for user use.

[0094] At this time, the first TDS probe 9 installed on the first connecting pipe 4 detects the TDS value A of the pre-filtered water (raw water), the flow meter 10 installed on the second connecting pipe 7 detects the flow rate u1 of the first effluent, and the second TDS probe 11 installed on the first water supply pipe 8 detects the TDS value a of the first effluent.

[0095] In this embodiment, the second mode is the working mode in which the inlet solenoid valve 13, the purified water regulating valve 312, and the purified water solenoid valve 14 are energized, and the concentrate solenoid valve 15 is de-energized. When the inlet solenoid valve 13, the purified water regulating valve 312, and the purified water solenoid valve 14 are energized, and the concentrate solenoid valve 15 is de-energized, the water supply pipe 1 delivers tap water to the pretreatment filter element 2. The pretreatment filter element 2 pre-filters the tap water to form pre-filtered water. The pre-filtered water is then delivered to the reverse osmosis filter element 3 through the first connecting pipe 4, and mixed with the pure water output from the outlet pipe 35 through the mixing water pipe 311 to form mixed water.

[0096] The mixed water is transported to the post-treatment filter element 6 through the second connecting pipe 7. The post-treatment filter element 6 further filters the mixed water to form purified water. The purified water is output through the first water supply pipe 8 for user use.

[0097] At this time, the first TDS probe 9 installed on the first connecting pipe 4 detects the TDS value of the pre-filtered water (raw water) A, the flow meter 10 installed on the second connecting pipe 7 detects the flow rate of the second effluent u2, and the second TDS probe 11 installed on the first water supply pipe 8 detects the TDS value of the second effluent b.

[0098] The above-described contents can be implemented individually or in various combinations, and these variations are all within the protection scope of this invention.

[0099] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water purification system with adjustable effluent TDS value, characterized in that: The system includes a water delivery pipe (1) for conveying tap water, a pre-treatment filter cartridge (2) for pre-filtration, a reverse osmosis filter cartridge (3) for reverse osmosis filtration, a first connecting pipe (4) for connecting the pre-treatment filter cartridge (2) and the reverse osmosis filter cartridge (3), and a booster pump (5) installed on the first connecting pipe (4). The water delivery pipe (1) is connected to the pre-treatment filter cartridge (2), the pre-treatment filter cartridge (2) pre-filters tap water to form pre-filtered water, the booster pump (5) drives the pre-filtered water to flow in the first connecting pipe (4), and the reverse osmosis filter cartridge (3) is provided with a water purification adjustment component (31), the water purification adjustment component (31) is used to make the reverse osmosis filter cartridge (3) perform reverse osmosis filtration on the pre-filtered water to form mixed water. The water purification system also includes a post-treatment filter element (6) for treating the mixed water to form purified water; The reverse osmosis filter element (3) includes a bottle (32), which has a pre-filtered water zone (321) for storing pre-filtered water and a pure water zone (322) for storing pure water. The bottle body (32) is also provided with a concentrate zone (323), which is used to store the concentrate produced during reverse osmosis filtration; The reverse osmosis filter element (3) also includes a central tube (324) disposed in the bottle body (32) and a reverse osmosis membrane (325) disposed in the bottle body (32). The reverse osmosis membrane (325) surrounds the outside of the central tube (324). The pure water zone (322) is formed inside the central tube (324). The pre-filtered water zone (321) is formed in the reverse osmosis membrane (325). The concentrated water zone (323) is formed between the reverse osmosis membrane (325) and the inner wall of the bottle body (32).

2. The water purification system with adjustable effluent TDS value as described in claim 1, characterized in that: The water purification system also includes a second connecting pipe (7) for connecting the reverse osmosis filter element (3) and the post-treatment filter element (6), and a first water supply pipe (8) connected to the post-treatment filter element (6), the first water supply pipe (8) being used to output purified water.

3. A water purification system with adjustable effluent TDS value as described in claim 2, characterized in that: The water purification system also includes a first TDS probe (9) on the first connecting pipe (4), a flow meter (10) on the second connecting pipe (7), and a second TDS probe (11) on the first water supply pipe (8). The first TDS probe (9) is used to detect the TDS value of the pre-filtered water, the flow meter (10) is used to detect the flow rate of the mixed water, and the second TDS probe (11) is used to detect the TDS value of the purified water.

4. A water purification system with adjustable effluent TDS value as described in claim 2, characterized in that: The reverse osmosis filter element (3) also includes an end cap (33) on the bottle body (32), an inlet pipe (34) on the end cap (33), and an outlet pipe (35) on the end cap (33). The end cap (33) is used to seal the bottle body (32). The inlet pipe (34) connects the first connecting pipe (4) to the pre-filtered water area (321). The outlet pipe (35) connects the pure water area (322) to the second connecting pipe (7). The water purification adjustment component (31) is connected in parallel between the inlet pipe (34) and the outlet pipe (35).

5. A water purification system with adjustable effluent TDS value as described in claim 4, characterized in that: The reverse osmosis filter element (3) also includes a filter element seat (36) disposed on the bottle body (32). The water purification adjustment assembly (31) includes a mixing water pipe (311) that connects the water inlet pipe (34) and the water outlet pipe (35), and a water purification adjustment valve (312) disposed on the mixing water pipe (311). The water purification adjustment valve (312) is used to control the opening or closing of the mixing water pipe (311). The water purification adjustment valve (312) is fixedly installed on the filter element seat (36).

6. A water purification system with adjustable effluent TDS value as described in claim 5, characterized in that: The water purification regulating valve (312) is provided with a throttling orifice. When the water purification regulating valve (312) is energized, the throttling orifice opens, and the pre-filtered water transported by the inlet pipe (34) flows from the throttling orifice to the outlet pipe (35). When the water purification regulating valve (312) is de-energized, the throttling orifice closes, and the inlet pipe (34) transports the pre-filtered water to the pre-filtered water zone (321).

7. A water purification system with adjustable effluent TDS value as described in claim 4, characterized in that: The reverse osmosis filter element (3) also includes a concentrate pipe (37), which is connected to the concentrate zone (323) to output concentrate from the concentrate zone (323).

8. A water purification system with adjustable effluent TDS value as described in claim 7, characterized in that: The water purification system also includes a second water supply pipe (12) connected to the concentrated water pipe (37), the second water supply pipe (12) being used to output concentrated water.

9. A method for controlling the adjustable TDS value of effluent, characterized in that, The method, applied to a water purification system with adjustable effluent TDS value as described in any one of claims 1-8, comprises: Receive an adjustment instruction for the effluent TDS value, and determine the target effluent TDS value based on the adjustment instruction for the effluent TDS value; Based on the target effluent TDS value, the first effluent TDS value in the first mode, the second effluent TDS value in the second mode, the first effluent flow rate in the first mode, and the second effluent flow rate in the second mode, calculate the first working time in the first mode and the second working time in the second mode. The first mode is the working mode in which the reverse osmosis filter cartridge outputs pure water, and the second mode is the working mode in which the reverse osmosis filter cartridge outputs mixed water. The current working mode is controlled to alternate between a first mode and a second mode, so that the single working time of the first mode is the first working time and the single working time of the second mode is the second working time.

10. The method for controlling the adjustable TDS value of effluent as described in claim 9, characterized in that, When the water purification system further includes a first water supply pipe (8), a second water supply pipe (12), and a water purification regulating valve (312), the first connecting pipe (4) is equipped with an inlet solenoid valve (13), the first water supply pipe (8) is equipped with a water purification solenoid valve (14), and the second water supply pipe (12) is equipped with a concentrated water solenoid valve (15). The first mode is the working mode in which the inlet solenoid valve (13) and the water purification solenoid valve (14) are energized, and the water purification regulating valve (312) and the concentrated water solenoid valve (15) are de-energized.

11. The method for controlling the adjustable TDS value of effluent as described in claim 9, characterized in that, When the water purification system further includes a first water supply pipe (8), a second water supply pipe (12), and a water purification regulating valve (312), the first connecting pipe (4) is equipped with an inlet solenoid valve (13), the first water supply pipe (8) is equipped with a water purification solenoid valve (14), and the second water supply pipe (12) is equipped with a concentrated water solenoid valve (15). The second mode is the working mode in which the inlet solenoid valve (13), the water purification regulating valve (312), and the water purification solenoid valve (14) are energized, and the concentrated water solenoid valve (15) is de-energized.

12. The method for controlling the adjustable TDS value of effluent as described in claim 9, characterized in that, When the water purification system further includes a flow meter (10) and a second TDS probe (11), the first effluent TDS value is the TDS value detected by the second TDS probe (11) in the first mode, the second effluent TDS value is the TDS value detected by the second TDS probe (11) in the second mode, the first effluent flow rate is the flow rate detected by the flow meter (10) in the first mode, and the second effluent flow rate is the flow rate detected by the flow meter (10) in the second mode.

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