Water purification system capable of reducing TDS (total dissolved solid) value of head-section water and water purifier
By introducing a TDS sensor and control valve design into the reverse osmosis water purification system, the system achieves the circulation and storage of pure water and the discharge of concentrated water, thus solving the problem of high TDS in the first-stage water of the reverse osmosis water purification system, extending the service life of the purification unit and saving water.
Patent Information
- Application Number
- CN202520420824.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-11
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-11
AI Technical Summary
Existing reverse osmosis water purification systems experience an increase in TDS value in the initial water after shutdown, resulting in wasted water resources, a poor user experience, and an inability to accurately determine the amount of water discharged.
A water purification system was designed, including a pressure reducing valve, a composite filter element, an inlet solenoid valve, a booster pump, and a reverse osmosis purification unit. Combined with a TDS sensor, a check valve, and a pressure sensor, the system controls the opening and closing of the valves and pump to achieve the circulation and storage of pure water and the discharge of concentrated water. This ensures that the reverse osmosis purification unit is immersed in pure water after shutdown, thereby reducing the TDS value of the first-stage water.
It effectively reduces the TDS value of the initial water, saves water, extends the service life of the reverse osmosis purification unit, improves the user experience, and avoids water waste.
Smart Images
Figure CN223936244U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of water purification technology, specifically to a water purification system and water purifier that can reduce the TDS value of the first-stage water. Background Technology
[0002] Most water purification systems on the market currently use reverse osmosis technology to achieve water purification. When the reverse osmosis unit is working, a pressure greater than the osmotic pressure is applied to the concentrate side. Water molecules in the concentrate side are forced to the pure water side, in the opposite direction to natural osmosis, thus separating water from solutes and purifying the water. When the reverse osmosis unit stops working, the water pressure on both sides of the unit is nearly equal. At this time, due to the presence of osmotic pressure, ions in the water will undergo inter-osmosis. The high concentration of ions on the concentrate side will slowly enter the pure water side, causing the TDS (Total Dissolved Solids) on the pure water side to gradually increase. Over time, it will gradually approach the TDS of the raw water side. The longer the water purification system is shut down, the higher the TDS of the initial water will be upon the next use. In areas with high raw water solids concentrations, the initial water may exhibit scaling and unpleasant odors after boiling.
[0003] Therefore, some reverse osmosis water purification systems will specify that after a long period of shutdown, the first-stage water must be discharged as wastewater and cannot be consumed when the system is used again. This is very wasteful of water resources and it is impossible to determine how much water is discharged. This method requires users to make their own judgments and operate each time, resulting in a very poor user experience and wasting water resources.
[0004] Therefore, existing technologies still need to be improved and developed. Utility Model Content
[0005] The technical problem to be solved by this utility model is to provide a water purification system that can reduce the TDS value of the first-stage water, which not only solves the problem of high TDS in the first-stage water of the water purification system, but also allows the reverse osmosis purification unit to be immersed in pure water after shutdown, thereby extending the service life of the reverse osmosis purification unit.
[0006] The technical solution adopted by this utility model to solve the technical problem is as follows:
[0007] A water purification system that can reduce the TDS value of the first-stage water includes a pressure reducing valve, a composite filter element, an inlet solenoid valve, a booster pump and a reverse osmosis purification unit arranged in series along the water flow direction of the raw water pipeline.
[0008] The reverse osmosis purification unit has a concentrate side and a pure water side;
[0009] The reverse osmosis purification unit is equipped with a wastewater pipeline on the concentrate side, and a wastewater solenoid valve is installed on the wastewater pipeline.
[0010] The reverse osmosis purification unit has a TDS sensor, a first check valve and a pressure sensor connected in series along the water flow direction of the pure water pipeline on the pure water side. The end of the pure water pipeline is used to connect to a faucet.
[0011] The TDS sensor is connected to the first one-way valve by a first water outlet pipe. The other end of the first water outlet pipe is connected between the water inlet solenoid valve and the booster pump. A second one-way valve, a water storage container, a return solenoid valve, and a third one-way valve are sequentially connected in series along the water flow direction of the first water outlet pipe.
[0012] The inlet solenoid valve, booster pump, TDS sensor, first check valve, pressure sensor, wastewater solenoid valve, second check valve, reflux solenoid valve, and third check valve are all electrically connected to the main control unit.
[0013] Preferably, a post-filter is provided between the pressure sensor and the faucet.
[0014] Preferably, a negative pressure valve is connected to the water storage container.
[0015] Preferably, the negative pressure valve is any device capable of unidirectional flow or generating negative pressure.
[0016] Preferably, a second water outlet pipe is connected between the TDS sensor and the first one-way valve, and the other end of the second water outlet pipe is connected between the pressure reducing valve and the composite filter element. A pressure relief valve is provided on the second water outlet pipe.
[0017] Preferably, the pressure relief valve is any device capable of unidirectional flow or controllable proportion.
[0018] Preferably, the water storage container is a water tank, filter bottle, or canister.
[0019] Preferably, the first check valve, the second check valve, and the third check valve are all solenoid valves or flow control switches.
[0020] Preferably, the pressure sensor is a Hall sensor or a flow sensor.
[0021] This application also provides a water purifier that includes the above-described water purification system capable of reducing the TDS value of the first-stage water.
[0022] Compared with existing technologies, the water purification system for reducing the TDS value of first-stage water provided by this utility model has the following advantages:
[0023] Beneficial effects:
[0024] When a user uses the system for the first time, the main control unit closes the second check valve, the reflux solenoid valve, the third check valve, and the pressure relief valve. Raw water then passes through the pressure reducing valve, the composite filter, the inlet solenoid valve, and the booster pump before entering the reverse osmosis purification unit. After passing through the reverse osmosis purification unit, pure water is formed. The remaining water is concentrated water, which is discharged through the wastewater valve. Pure water passes through the TDS sensor, the first check valve, the pressure sensor, and the post-filter before being connected to the user's faucet and discharged. This effectively solves the problem of high TDS in the initial stage of the water purification system.
[0025] When the user turns on the tap again after a period of time, the booster pump works, pumping low-TDS water into the reverse osmosis purification unit. The TDS difference between the concentrate side and the pure water side of the reverse osmosis purification unit will be relatively small. When the pure water membrane is not activated, the TDS value of the initial water will be relatively stable, which can quickly reach the standard desalination rate of the water purifier. It can also extend the rinsing time of the water storage container for the reverse osmosis purification unit, saving water and avoiding water waste. Attached Figure Description
[0026] To more clearly illustrate the solution of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0027] Figure 1 This is a schematic diagram of a water purification system embodiment of the present invention, which can reduce the TDS value of the first-stage water. Detailed Implementation
[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.
[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0030] This utility model embodiment provides a water purification system that can reduce the TDS value of the first-stage water, such as... Figure 1 As shown, it includes: a pressure reducing valve 1, a composite filter element 2, an inlet solenoid valve 3, a booster pump 4, and a reverse osmosis purification unit 5, which are sequentially connected in series along the water flow direction of the raw water pipeline 001; the reverse osmosis purification unit 5 has a concentrate side and a pure water side; a wastewater pipeline 002 is provided on the concentrate side of the reverse osmosis purification unit 5, and a wastewater solenoid valve 10 is provided on the wastewater pipeline 002; a TDS sensor 6, a first check valve 7, and a pressure sensor 8 are sequentially connected in series along the water flow direction of the pure water pipeline 003 on the pure water side of the reverse osmosis purification unit 5, and the end of the pure water pipeline 003 is used to connect to a faucet; The TDS sensor 6 is connected to the first one-way valve 7 by a first outlet pipe 004. The other end of the first outlet pipe 004 is connected between the inlet solenoid valve 3 and the booster pump 4. A second one-way valve 11, a water storage container 12, a return solenoid valve 13, and a third one-way valve 14 are sequentially connected in series along the water flow direction of the first outlet pipe 004. The inlet solenoid valve 3, the booster pump 4, the TDS sensor 6, the first one-way valve 7, the pressure sensor 8, the wastewater solenoid valve 10, the second one-way valve 11, the return solenoid valve 13, and the third one-way valve 14 are all electrically connected to the main control unit (not shown in the figure).
[0031] In a specific implementation, a post-filter element 9 is installed between the pressure sensor 8 and the faucet, and a negative pressure valve 15 is connected to the water storage container 12. Alternatively, the negative pressure valve 15 can be omitted; it can be any device capable of unidirectional flow or generating negative pressure, such as a check valve or a solenoid valve. The post-filter element 9 can also be omitted.
[0032] The composite filter element 2 and the post-filter element 9 can be single-stage filter element filtration, multi-stage mixed filter element filtration, or composite integrated filter element filtration used in conventional water purification systems, or other pretreatment methods. The composite filter element 2 can be used as long as the pretreated water can be used for reverse osmosis treatment.
[0033] In specific implementation, a second water outlet pipe 005 connects the TDS sensor 6 and the first one-way valve 7. The other end of the second water outlet pipe 005 is connected between the pressure reducing valve 1 and the composite filter element 2. A pressure relief valve 16 is installed on the second water outlet pipe 005. Of course, the pressure relief valve 16 may not be installed. The pressure relief valve 16 can be any device capable of unidirectional flow or controllable proportion, such as a solenoid valve, flow valve, etc.
[0034] When a user uses the system for the first time, the main control unit closes the second check valve 11, the reflux solenoid valve 13, the third check valve 14, and the pressure relief valve 16. The raw water passes through the pressure reducing valve 1, the composite filter element 2, the inlet solenoid valve 3, and the booster pump 4 in sequence before entering the reverse osmosis purification unit 5. After passing through the reverse osmosis purification unit 5, pure water is formed. The water that has not yet been purified is concentrated water, which is discharged through the wastewater valve 10. The pure water passes through the TDS sensor 6, the first check valve 7, the pressure sensor 8, and the post-filter element 9 before being connected to the user's faucet to discharge pure water.
[0035] When the user turns off the tap, the control unit opens the second one-way valve 11, and the pure water from the reverse osmosis purification unit 5 flows into the water storage container 12 through the second one-way valve 11. When the water volume in the water storage container 12 is about to reach the preset pressure value, the pressure relief valve 16 opens and slowly lets the excess pure water flow into the composite filter element 2. The pressure is released and the water will smoothly reach the preset pressure value. The control unit then closes the inlet solenoid valve 3. At this time, the booster pump 4 stops working. The pressure relief valve 16 will generate a certain positive pressure on the pure water side of the reverse osmosis purification unit 5 to delay the permeation time of the concentrated water side of the reverse osmosis unit 5 to the pure water side, which can effectively extend the pure water washing time and avoid water waste. The control unit controls the TDS sensor 6 to collect parameters and determine the delayed opening time of the reflux solenoid valve 13 and the third check valve 14. Then, it turns on the booster pump 4 to pressurize the pure water in the water storage container 12 into the reverse osmosis purification unit 5, replacing all the concentrated water on the reverse osmosis purification unit 5 with low TDS pure water. Then, the booster pump 4 stops working, the reflux solenoid valve 13 and the third check valve 14 close, and the water purification system enters standby mode. At this time, since both sides of the reverse osmosis purification unit 5 are filled with low TDS pure water, there will be no problem of high TDS pure water flowing out in the first stage of the water when the water purifier is used again after a period of time.
[0036] In other words, when the user turns on the tap again after a period of time, the booster pump 4 works, pressurizing the reverse osmosis purification unit 5 with low TDS water. The TDS difference between the concentrate side and the pure water side of the reverse osmosis purification unit 5 will be relatively small. When the pure water membrane is not activated, the TDS value of the first-stage water will be relatively stable, which can quickly reach the standard desalination rate of the water purifier, extend the rinsing time of the water storage container 12 on the reverse osmosis purification unit 5, save water and avoid water waste.
[0037] Furthermore, for areas with high raw water TDS concentrations, the system can better address the issue of high TDS in the initial water supply. The specific implementation is as follows: After the user turns off the pure water faucet, the water purification system continues to operate. The control unit opens the second one-way valve 11, allowing pure water in the pure water pipeline 003 to flow into the storage container 12 through the second one-way valve 11. When the water level in the storage container 12 reaches the preset value of the pressure sensor 8, the pressure relief valve 16 opens, and the water purification system continues to operate for a period of time, forcing pure water through the pressure relief valve 1 into the composite filter element 2 to mix with the high TDS raw water. At this time, the high TDS raw water of the composite filter element 2 will become low TDS water after being mixed with pure water. When the user turns on the water purification system faucet again after a period of time, the booster pump 4 will work and pressurize the reverse osmosis purification unit 5 with low TDS water. The TDS difference between the concentrate side and the pure water side of the reverse osmosis purification unit 5 will be relatively small. When the pure water membrane is not started, the TDS value of the first section of water will be relatively stable, which can quickly reach the standard desalination rate of the water purifier, extend the rinsing time of the water storage container 12 to the reverse osmosis purification unit 5, save water and avoid water waste.
[0038] In specific implementation, the water storage container 12 can be a variety of water storage devices, such as a water tank, filter bottle, canister, or pressure-resistant water storage container of any shape.
[0039] In specific implementation, the first one-way valve 7, the second one-way valve 11, and the third one-way valve 14 can be any device capable of unidirectional flow or controllable opening and closing, such as a solenoid valve or a flow control switch.
[0040] In practice, the pressure sensor 8 can be any device capable of detecting water pressure and flow rate, such as a Hall sensor or a flow sensor.
[0041] This application also provides a water purifier that includes the above-described water purification system capable of reducing the TDS value of the first-stage water.
[0042] In summary, this utility model discloses a water purification system and water purifier that can reduce the TDS value of the first-stage water. It not only solves the problem of high TDS in the first-stage water of the purification system, but also allows the reverse osmosis purification unit to be immersed in pure water after shutdown, thereby extending the service life of the reverse osmosis purification unit.
[0043] Obviously, the embodiments described above are only some embodiments of this application, not all embodiments. The accompanying drawings show preferred embodiments of this application, but do not limit the patent scope of this application. This application can be implemented in many different forms; rather, the purpose of providing these embodiments is to provide a more thorough and comprehensive understanding of the disclosure of this application. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this application's specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the scope of patent protection of this application.
Claims
1. A water purification system capable of reducing the TDS value of initial water, comprising a pressure reducing valve, a composite filter element, an inlet solenoid valve, a booster pump, and a reverse osmosis purification unit arranged in series along the water flow direction of the raw water pipeline, characterized in that, The reverse osmosis purification unit has a concentrate side and a pure water side; The reverse osmosis purification unit is equipped with a wastewater pipeline on the concentrate side, and a wastewater solenoid valve is installed on the wastewater pipeline. The reverse osmosis purification unit has a TDS sensor, a first check valve and a pressure sensor connected in series along the water flow direction of the pure water pipeline on the pure water side. The end of the pure water pipeline is used to connect to a faucet. The TDS sensor is connected to the first one-way valve by a first water outlet pipe. The other end of the first water outlet pipe is connected between the water inlet solenoid valve and the booster pump. A second one-way valve, a water storage container, a return solenoid valve, and a third one-way valve are sequentially connected in series along the water flow direction of the first water outlet pipe. The inlet solenoid valve, booster pump, TDS sensor, first check valve, pressure sensor, wastewater solenoid valve, second check valve, return solenoid valve, and third check valve are all electrically connected to the main control unit.
2. The water purification system for reducing the TDS value of first-stage water according to claim 1, characterized in that, A post-filter is installed between the pressure sensor and the faucet.
3. The water purification system for reducing the TDS value of first-stage water according to claim 1, characterized in that, The water storage container is connected to a negative pressure valve.
4. The water purification system for reducing the TDS value of first-stage water according to claim 3, characterized in that, The negative pressure valve can be any device capable of unidirectional flow or generating negative pressure.
5. The water purification system for reducing the TDS value of first-stage water according to claim 1, characterized in that, The TDS sensor is connected to the first one-way valve by a second water outlet pipe. The other end of the second water outlet pipe is connected between the pressure reducing valve and the composite filter element. A pressure relief valve is installed on the second water outlet pipe.
6. The water purification system for reducing the TDS value of first-stage water according to claim 5, characterized in that, The pressure relief valve can be any device capable of unidirectional flow or controllable proportion.
7. The water purification system for reducing the TDS value of first-stage water according to claim 1, characterized in that, The water storage container is a water tank, filter bottle, or canister.
8. The water purification system for reducing the TDS value of first-stage water according to claim 1, characterized in that, The first check valve, the second check valve, and the third check valve are all solenoid valves or flow control switches.
9. The water purification system for reducing the TDS value of first-stage water according to claim 1, characterized in that, The pressure sensor is either a Hall sensor or a flow sensor.
10. A water purifier, characterized in that, Including the water purification system that can reduce the TDS value of first-stage water as described in any one of claims 1-9.