A pure water osmosis system for solving the problem of excessively high TDS in the first glass of water

Abstract

The present invention discloses a pure water penetration system for solving the problem of excessively high TDS of the first glass of water, which includes a raw water passage, a concentrated water passage, a pure water passage, a reverse osmosis filter element, a pretreatment filter element, and a penetration tank; a booster pump is provided between the pretreatment filter element and the RO membrane filter element, and an inlet solenoid valve is provided behind the booster pump. A throttle valve is provided on the concentrated water passage, and a flushing solenoid valve is connected in parallel with the throttle valve; a penetration tank is connected to the pure water passage, and a check valve and a high-pressure switch are provided on the pure water passage and connected to the water outlet faucet. The high-pressure switch controls the pressure of the penetration tank. By setting the flow rate of the waste water throttle valve to be not greater than the penetration flow rate of the penetration tank, after the machine stops working, the pressures before and after the RO membrane tend to be dynamically balanced, and the pressure is gradually reduced to the atmospheric pressure state through the pressure relief of the throttle valve. When the pure water in the penetration tank penetrates through the RO membrane, it gradually displaces the concentrated water in front of the membrane, thereby achieving the effect of soaking the RO membrane with pure water, solving the problem of excessively high TDS of the first glass of water during the next water production, and the pure water soaking the membrane also plays a role in prolonging the membrane life.

Description

Technical Field

[0001] The present invention relates to the field of water purifier management, and particularly to a pure water penetration system for solving the problem of excessive TDS of the first glass of water. Background Art

[0002] With the improvement of people's living standards, the use of water purifiers is becoming increasingly common. Among them, reverse osmosis water purifiers are a widely used type. Reverse osmosis water purifiers generally use reverse osmosis filters. There is a typical problem with reverse osmosis filters. When the water purifier is in a shutdown state, the concentrated water remaining in the reverse osmosis filter will penetrate to the pure water side, resulting in an increase in the TDS value of the water on the pure water side. Especially for the current large-flux barrelless reverse osmosis water purifiers, after the TDS value on the pure water side increases, it will be directly used when the next user takes water, which is not conducive to water quality hygiene and safety.

[0003] There are multiple ideas to solve this problem:

[0004] 1. Adding a storage bucket: Diluting with the pure water in the storage bucket. This method does not solve the essential problem. It is only diluted for drinking. The storage bucket is large in volume, occupies space, and has a high risk of secondary pollution. Many customers choose barrelless large-flux water purifiers;

[0005] 2. Increasing the flushing before water intake: Before each water intake, flushing is carried out through the design of pipelines and programs before water can be discharged. This method requires waiting for the flushing to complete before water can be discharged each time water is taken, and the pause during flushing brings a very poor experience to users.

[0006] 3. Pure water immersion: Letting the pure water return to the front of the membrane for immersion through pipeline design. This method has complex pipelines and programs, but it is currently a more commonly used method.

[0007] 4. Pure water penetration: The pure water behind the membrane penetrates to the front of the membrane, so as to achieve the purpose of diluting the concentrated water in front of the membrane. However, usually the RO membrane cannot withstand the too high osmotic pressure on the pure water side. Normal membrane manufacturers do not recommend the use environment with too high osmotic pressure on the pure water side, which will damage the function of the membrane. The present invention solves this problem through reasonable design, adopts the method of pure water penetration to solve the problem of the increase in the TDS value of the water on the pure water side during long-term shutdown, and at the same time ensures the normal function of the RO membrane. Summary of the Invention

[0008] In order to overcome the shortcomings and deficiencies of the prior art, the present invention provides a pure water penetration system for solving the problem of excessive TDS of the first glass of water.

[0009] The technical solution adopted by the present invention is that the system includes:

[0010] A reverse osmosis filter, which is provided with a water inlet end, a concentrated water end, and a pure water end;

[0011] The water inlet passage is connected to the water inlet end, and a pretreatment filter element, a booster pump, and a water inlet solenoid valve are sequentially connected on the water inlet passage;

[0012] The concentrated water passage is connected to the concentrated water end, and a throttling device and a flushing solenoid valve are connected in parallel downstream of the concentrated water end;

[0013] The pure water passage is connected to the pure water end, and a check valve and a high-pressure switch are connected downstream of the pure water end;

[0014] The permeation tank is provided with an inlet and outlet water passage and is connected between the pure water end and the check valve;

[0015] The pure water passes through the pretreatment filter element, the booster pump, and the water purification solenoid valve, enters the permeation tank and the water outlet faucet. After the machine stops working, the pure water in the permeation tank permeates through the RO membrane to the front of the membrane and is discharged from the concentrated water end.

[0016] A throttling device is provided on the concentrated water passage, and the water outlet flow rate of the throttling device shall not be greater than the flow rate of the permeation tank permeating through the reverse osmosis filter element.

[0017] Furthermore, there is a gas cavity or an airbag in the permeation tank, and a common inlet and outlet water passage is provided.

[0018] Furthermore, the flow rate of the permeation tank permeating through the reverse osmosis filter element shall not be less than the water outlet flow rate of the throttling device.

[0019] Furthermore, the internal pressure of the permeation tank is controlled by the high-pressure switch, and the pressure of the high-pressure switch is set to 0.2 - 0.3 MPa.

[0020] Furthermore, the flushing process in the system can be completed by adding tap water for flushing.

[0021] Furthermore, the system can be used simultaneously with a small-flux water purifier and a storage water tank, which can effectively improve the water efficiency and at the same time extend the membrane life.

[0022] Beneficial effects:

[0023] The present invention provides a pure water osmosis system for solving the problem of excessively high TDS in the first cup of water. The pure water passes through a pretreatment filter element, a booster pump, and a water purification solenoid valve, and enters the osmosis tank and the water outlet faucet. After the faucet is closed, the pure water enters the osmosis tank until the high-pressure switch is disconnected and the machine stops working; the concentrated water is discharged through a throttle valve. The flow rate of the wastewater throttle valve is set not to be greater than the osmosis flow rate of the osmosis tank. After the machine stops working, when the pressure in front of the RO membrane and the pressure in the osmosis tank tend to balance, the pressure before and after the membrane is dynamically balanced and gradually drops to normal pressure. If the flow rate of the wastewater throttle valve is too large, it will cause the concentrated water outlet to relieve pressure too quickly, and the pressure behind the membrane will be higher than that in front of the membrane, which will damage the RO membrane; by adopting the pure water osmosis principle to displace the concentrated water in front of the membrane, it can effectively protect the RO membrane, reduce the problem of excessively high TDS in the first cup of water, and improve the service life of the membrane; with a small wastewater flow rate, the pump can be of a lower configuration and the water efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic structural diagram of the system of the present invention;

[0025] Figure 2 It is a schematic diagram of the system of the present invention used in combination with a water storage bucket;

[0026] Figure 3 It is a schematic diagram of the system of the present invention used in combination with a tap water faucet;

[0027] Figure 4 It is a schematic diagram of the system of the present invention used in combination with a double faucet;

[0028] Figure 5 It is a schematic circuit diagram of the system of the present invention used in combination with tap water. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] It should be noted that, without conflict, the embodiments in this application and the features in the embodiments can be combined with each other. The following will further describe the present application in detail with reference to the drawings and specific embodiments.

[0030] As Figure 1 shown, a pure water osmosis system for solving the problem of excessively high TDS in the first cup of water, the system includes: a reverse osmosis filter element 7, having a water inlet end 71, a concentrated water end 72, and a pure water end 73;

[0031] A water inlet passage 1, connected to the water inlet end 71, and a pretreatment filter element 6, a booster pump 9, and a water inlet solenoid valve 10 are sequentially connected on the water inlet passage 1;

[0032] A concentrated water passage 2, connected to the concentrated water end 72, and a throttling device 14 and a flushing solenoid valve 11 are connected in parallel downstream of the concentrated water end 72;

[0033] A pure water passage 3, connected to the pure water end 73, and a check valve 12 and a high-pressure switch 13 are connected downstream of the pure water end 73;

[0034] The permeation tank 8 is provided with a water inlet and outlet channel 5 and is connected between the pure water end 73 and the one-way valve 12.

[0035] The pure water passes through the pretreatment filter element, the booster pump, and the water purification solenoid valve, enters the permeation tank 8 and the water outlet faucet. After the machine stops working, the pure water in the permeation tank permeates through the RO membrane to the front of the membrane and is discharged from the concentrated water end.

[0036] A throttling device 14 is provided on the concentrated water passage 2, and the water outlet flow rate of the throttling device 14 shall not be greater than the flow rate of the permeation tank 8 permeating through the reverse osmosis filter element 7.

[0037] There is a gas cavity or airbag in the permeation tank 8, and a common water inlet and outlet channel 5 is provided.

[0038] The flow rate of the permeation tank 8 permeating through the reverse osmosis filter element 7 shall not be less than the water outlet flow rate of the throttling device 14.

[0039] The internal pressure of the permeation tank 8 is controlled by the high-pressure switch 13, and the pressure of the high-pressure switch 13 is set to 0.2 - 0.3 MPa.

[0040] The system is completed by increasing the tap water flushing during the flushing process.

[0041] The system is used for the simultaneous use of a small-flux water purifier and a storage water tank, improving the water efficiency and prolonging the membrane life at the same time.

[0042] Embodiment 1:

[0043] A schematic diagram of a pure water permeation system for solving the problem of too high TDS of the first glass of water in this patent. The system installs a permeation tank on the pure water outlet pipeline, installs a throttling device on the concentrated water passage, and sets the flow rate of the throttling device not to be greater than the permeation flow rate of the permeation tank. When the throttling device drains water after the machine stops working, the pressure in front of the membrane decreases. When the pressure decreases to the same as the pressure of the permeation tank, the pressures before and after the membrane reach dynamic balance, and at the same time, the pressure drops to normal pressure. At this time, the pure water in the permeation tank permeates and is discharged from the concentrated water outlet, replacing the concentrated water in front of the membrane, thereby reducing the TDS value of the first glass of water after restarting the machine. The pure water soaks the membrane, which also effectively prolongs the membrane life.

[0044] Embodiment 2:

[0045] As Figure 2As shown, this patent mainly uses the method of pure water penetration to solve the problem that the TDS value of the water on the pure water side increases after a long-term shutdown. While solving the problem, the water efficiency is effectively improved and the membrane life is extended. Therefore, the water efficiency can also be improved in small-flux machines through this system. The main approach is as follows: Add a water storage bucket 18 to the system in Example 1. After a long-term shutdown of a machine with a water storage bucket, when it is first turned on, the TDS is not high only because the amount of pure water in the intermediate water storage bucket is large, diluting the high-concentration water. It is not that there is no generation of high-concentration water. Therefore, after adopting this system, not only can the problem of the first glass of water be effectively solved, but also the water production rate and the membrane life can be improved.

[0046] Embodiment 3:

[0047] As Figures 3 - 5 shown, the patent system can be used in conjunction with a double faucet, effectively utilizing the flushing effect during the use of the tap water faucet.

[0048] Install a check valve 16 on the pure water pipeline, branch out a tap water pipeline 4 from the concentrated water pipeline, and install a check valve 15 and a low-pressure switch 17 on the pipeline. When the tap water faucet 19 is opened, the water flow passes through the concentrated water end 72 and flows out through the check valve 15. The tap water faucet can be combined with the pure water faucet into a double faucet 20. When it is not a double faucet, the water purification faucet 2 and the tap water faucet 19 cannot be opened and used simultaneously.

[0049] The electrical control principle is as follows:

[0050] 1. When powered on and the tap water faucet is opened, the pressure decreases, the low-pressure switch disconnects, causing the normally open solenoid valve to be energized and close the water, and the booster pump circuit is disconnected; at the same time, the high-pressure switch closes, the inlet solenoid valve is energized and opened, and it flushes for about 2 minutes. At this time, it is necessary to check that there is no water leakage in the pipe fittings;

[0051] 2. When the tap water faucet is closed, the pressure increases, the low-pressure switch de-energizes the normally open solenoid valve to let water through, and the booster pump circuit is connected; the high-pressure switch closes. At this time, the inlet solenoid valve is energized and opened, the booster pump is energized and operates, and starts to produce water. The pure water enters the osmosis tank.

[0052] 3. When the pressure in the osmosis tank reaches the pressure at which the high-pressure switch disconnects, the high-pressure switch disconnects, the inlet valve is de-energized and closed, the booster pump is de-energized and stops running, and the water is full and stops working;

[0053] 4. When the water purification faucet is opened to release water, similar to step 2, it will enter the water production state. After flushing and backwashing the tank and the pure water pipeline for 5 minutes, it can be drunk;

[0054] 5. When the water purification faucet is closed and the high-pressure switch is disconnected, the inlet solenoid valve is closed, solenoid valve 21 is opened, and the membrane concentrated water is discharged. When the pressure drops to the same as the pressure in the permeation tank, the dynamic balance before and after the membrane is achieved, and both drop to atmospheric pressure together. The concentrated water in front of the membrane is flushed away by the pure water in the permeation tank, and the TDS of the first glass of water when the pure water faucet is opened next time will not be high.

[0055] 6. Water production and tap water discharge cannot be carried out simultaneously. When using tap water, the booster pump does not work and pure water cannot be discharged.

[0056] The present invention proposes a pure water permeation system for solving the problem of too high TDS of the first glass of water. The pure water passes through the pretreatment filter element, booster pump, water purification solenoid valve, enters the permeation tank and the water outlet faucet. After the faucet is closed, the pure water enters the permeation tank until the machine stops working after the high-pressure switch is disconnected; the concentrated water is discharged through the throttle valve. The flow rate of the wastewater throttle valve is set not to be greater than the permeation flow rate of the permeation tank, so that after the machine stops working, when the pressure in front of the RO membrane tends to balance with the pressure in the permeation tank, the pressure before and after the membrane is dynamically balanced and gradually drops to atmospheric pressure. If the flow rate of the wastewater throttle valve is too large, it will cause the concentrated water outlet to relieve pressure too quickly, and the pressure behind the membrane will be higher than that in front of the membrane, which will damage the RO membrane; by adopting the pure water permeation principle to displace the concentrated water in front of the membrane, it can effectively protect the RO membrane, reduce the problem of too high TDS of the first glass of water, and improve the service life of the membrane; with a small wastewater flow rate, the pump can be of a lower configuration and the water efficiency is high.

[0057] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected", "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood through specific situations.

[0058] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various equivalent changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalent scope.

Claims

1. A pure water permeation system for solving the problem of excessively high TDS in the first cup of water, characterized in that, The system includes: A reverse osmosis filter element (7) having a water inlet end (71), a concentrated water end (72), and a pure water end (73); A water inlet passage (1) connected to the water inlet end (71), and a pretreatment filter element (6), a booster pump (9), and a water inlet solenoid valve (10) are sequentially connected to the water inlet passage (1); A concentrated water passage (2) connected to the concentrated water end (72), and a throttling device (14) and a flushing solenoid valve (11) are connected in parallel downstream of the concentrated water end (72); A pure water passage (3) connected to the pure water end (73), and a check valve (12) and a high-pressure switch (13) are connected downstream of the pure water end (73); An osmosis tank (8) having a water inlet and outlet channel (5) and connected between the pure water end (73) and the check valve (12); The pure water in the osmosis tank permeates to the front of the membrane through the RO membrane after the machine stops working and is discharged from the concentrated water end; A throttling device (14) is provided on the concentrated water passage (2), and the water outlet flow rate of the throttling device (14) shall not be greater than the flow rate of the osmosis tank (8) permeating through the reverse osmosis filter element (7); The osmosis tank (8) has a gas cavity or an airbag inside and is provided with a common water inlet and outlet channel (5); The flow rate of the osmosis tank (8) permeating through the reverse osmosis filter element (7) shall not be less than the water outlet flow rate of the throttling device (14); The internal pressure of the osmosis tank (8) is controlled by the high-pressure switch (13), and the pressure of the high-pressure switch (13) is set to 0.2 - 0.3 MPa; The system is completed by increasing the tap water flushing during the flushing process; The system is used for the simultaneous use of a small-flux water purifier and a storage water tank, improving water efficiency and prolonging the membrane life.

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