Water purification system and method of controlling the same

Abstract

The application discloses a water purification system and a control method thereof, and belongs to the technical field of water purification production equipment. The water purification system is designed to solve the problems of low production efficiency of bubble water in the prior art. The water purification system comprises a water inlet assembly, a water purification assembly, a concentrated water assembly and a bubble water assembly. The water inlet assembly comprises a filter element, a first water inlet valve, a pressure reducing valve and a booster pump which are arranged on a water inlet pipe. The first water inlet valve and the pressure reducing valve are connected in parallel and arranged between the filter element and the booster pump. The water purification assembly is connected to an outlet end of the water inlet pipe. The concentrated water assembly is connected to a concentrated water outlet end of the water purification assembly and is configured to release concentrated water generated by the water purification assembly. An aeration pipeline is connected between a concentrated water pipe and the water inlet pipe. The bubble water assembly is connected to the outlet end of the water inlet pipe and is configured to produce bubble water. The water purification system and the control method thereof are capable of producing bubble water more easily, have high preparation efficiency and can produce a large amount of bubble water.

Description

Technical Field

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

[0002] A water purification system includes an inlet pipe, a purified water outlet pipe, and an aerated water outlet pipe, with an air-injection component installed on the inlet pipe. When the air-injection component is closed, the raw water in the inlet pipe passes through the purified water outlet pipe to form purified water; when the air-injection component is turned on, it injects air into the inlet pipe, forming large bubbles in the water for subsequent processing into aerated water.

[0003] In this structure, the air replenishment component is located on the water inlet pipe. The air intake is small, the efficiency of producing sparkling water is slow, and it is difficult to meet the timely and large-scale supply of sparkling water, thus limiting its applicability. In addition, compared with the concentrate pipe, the purified water outlet pipe and the sparkling water outlet pipe, the water pressure in the water inlet pipe is higher, which also places higher demands on the sealing performance of the connection between the air replenishment component and the water inlet pipe. Summary of the Invention

[0004] The purpose of this invention is to propose a water purification system and its control method, which has high efficiency in producing sparkling water.

[0005] To achieve this objective, the present invention employs the following technical solution:

[0006] A water purification system includes: an inlet assembly comprising a filter element, a first inlet valve, a pressure reducing valve, and a booster pump disposed on an inlet pipe, wherein the first inlet valve and the pressure reducing valve are connected in parallel and disposed between the filter element and the booster pump; a purification assembly connected to the outlet end of the inlet pipe, the purification assembly being configured to purify raw water; a concentrate assembly connected to the concentrate outlet end of the purification assembly, the concentrate assembly being configured to release the concentrate produced by the purification assembly; an aeration pipe connected between the concentrate pipe of the concentrate assembly and the inlet pipe of the inlet assembly, the aeration pipe being used to allow air or a water-air mixture from the concentrate pipe to enter the inlet pipe via the aeration pipe; and a sparkling water assembly connected to the outlet end of the inlet pipe, the sparkling water assembly being configured to produce sparkling water.

[0007] In one preferred embodiment, the water purification system further includes an air intake assembly, the air intake assembly, the concentrate pipe, and the air supply pipe are connected at the same node, and the air intake assembly is configured to supply air into the concentrate pipe.

[0008] In one preferred embodiment, the air intake assembly includes an air pump and a first one-way valve, and a control valve assembly is provided on the air inflation line. The air generated by the air pump can enter the water inlet pipe through the air inflation line, or enter the water inlet pipe together with the concentrated water in the concentrated water pipe through the air inflation line.

[0009] In one preferred embodiment, the control valve assembly includes a third check valve and a third solenoid valve.

[0010] In one preferred embodiment, the water inlet assembly further includes a raw water quality detection device and a controller connected to each other, the controller being connected to the concentrate assembly.

[0011] In one preferred embodiment, the water purification system further includes a reverse osmosis flushing assembly, which includes a first solenoid valve and a fourth check valve sequentially disposed on a reverse osmosis flushing pipe. One end of the reverse osmosis flushing pipe is connected to the purified water outlet end of the water purification assembly, and the other end of the reverse osmosis flushing pipe is connected to the concentrate pipe.

[0012] In one preferred embodiment, the concentrate assembly includes a concentrate valve and a second solenoid valve sequentially disposed on a concentrate pipe, and the other end of the reverse osmosis flushing pipe is connected to the concentrate pipe between the concentrate valve and the second solenoid valve.

[0013] In one preferred embodiment, the air outlet of the air intake assembly is connected to the concentrate pipe between the concentrate valve and the second solenoid valve.

[0014] In one preferred embodiment, the sparkling water assembly further includes a sparkling water detection switch configured to detect whether a user has taken sparkling water and / or to detect the amount of sparkling water dispensed.

[0015] In one preferred embodiment, the filter element includes a pre-filter and a post-processing filter, which are disposed in the same housing but are independent of each other.

[0016] On the other hand, the present invention adopts the following technical solution:

[0017] A control method based on the above-mentioned water purification system, wherein when producing sparkling water, the first inlet valve is closed, the booster pump is started, the water remaining in the water purification component is drawn into the aeration pipeline, the water remaining and the gas injected into the concentrate pipe form a water-gas mixture, the water-gas mixture is mixed with the raw water in the inlet pipe and then sent to the booster pump, and after being pressurized, it enters the sparkling water component to produce sparkling water.

[0018] In one preferred embodiment, when the quality of the raw water in the inlet pipe reaches a set value, the concentrate component is shut off to reduce the amount of concentrate discharged.

[0019] In one preferred embodiment, when a new water purification system is activated or the reverse osmosis membrane filter element of the water purification system is replaced, the water purification system automatically flushes, opens the first inlet valve, and no gas is charged into the inlet pipe of the inlet component in the air-filling pipeline. The booster pump is started, and the outlet of the water purification component and the outlet of the aerated water component are closed. The first solenoid valve of the reverse osmosis flushing component and the water purification component are started, and the water produced by the water purification component enters the concentrate component through the reverse osmosis flushing component.

[0020] In one preferred embodiment, when preparing purified water, the first inlet valve is opened, the booster pump is started, and no gas is introduced into the inlet pipe of the inlet assembly from the air filling pipeline.

[0021] The water purification system provided by this invention features a first inlet valve and a pressure reducing valve connected in parallel. When preparing purified water, the pressure reducing valve is closed, without affecting the purification efficiency. When preparing sparkling water, the pressure reducing valve is opened, making it easier for the air or water-air mixture in the aeration pipeline to be injected into the inlet pipe, resulting in high sparkling water production efficiency. The existing return pipe is reused as an aeration pipeline capable of supplying air or water-air mixture to the inlet pipe, reducing the overall cost. The aeration pipeline is connected to the concentrate pipe; because the water pressure in the concentrate pipe is lower, the connection between the aeration pipeline and the concentrate pipe is less likely to tear under water pressure, reducing sealing requirements and manufacturing difficulty. An aeration pipeline connects the concentrate component and the inlet component, allowing water-air mixture to be injected into the inlet component. Compared to existing single-gas inlet methods, this water purification system's water-air mixture inlet method more easily produces sparkling water, resulting in high production efficiency, large sparkling water output, wide applicability, and improved water utilization.

[0022] The control method of the water purification system provided by the present invention is to first form a water-gas mixture with the water stored in the water purification component and the gas in the aeration pipeline, and then mix it with the raw water in the water inlet pipe. After pressurization, the mixture enters the bubble water component to produce bubble water, resulting in a large output of bubble water and high production efficiency. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the water purification system provided in a specific embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram of the structure of the water purification system during the flushing of the reverse osmosis membrane protective liquid according to a specific embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the water purification system provided in the specific embodiment of the present invention under the water purification and water production mode;

[0026] Figure 4This is a schematic diagram of the water purification system provided in the bubble water production mode according to a specific embodiment of the present invention.

[0027] In the picture:

[0028] 1. Water inlet assembly; 2. Water purification assembly; 3. Concentrated water assembly; 4. Aerated water assembly; 5. Reverse osmosis flushing assembly; 6. Air inlet assembly; 31. Air inflation pipeline. Detailed Implementation

[0029] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of the present invention. However, the present invention can be practiced in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0034] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0035] This embodiment provides a water purification system and a control method based on the water purification system. For example... Figure 1 As shown, the water purification system includes an inlet component 1, a purification component 2 for purifying raw water, a concentrate component 3 for releasing the concentrate produced by the purification component 2, an air inlet component 6 for supplying a water-air mixture to the concentrate component 3, and a bubble water component 4 for producing bubble water. In this embodiment, bubble water refers to a mixture of air and water formed under certain pressure conditions, where air is mixed and dissolved in water, and the pressure is released instantaneously, resulting in a mixture containing a large number of microbubbles with a diameter of less than 80 μm.

[0036] The water inlet assembly 1 includes a filter element, a first inlet valve, a pressure reducing valve, and a booster pump mounted on the inlet pipe. The first inlet valve and the pressure reducing valve are connected in parallel and positioned between the filter element and the booster pump. The inlet of the inlet pipe is connected to the raw water source, and the outlet is connected to the water purification assembly 2. The filter element includes a pre-filter element belonging to the water inlet assembly 1 and a post-filter element belonging to the water purification assembly 2. The pre-filter element and the post-filter element are housed in the same housing but are independent of each other. The pre-filter element performs preliminary filtration of the raw water, the first inlet valve can cut off or connect the water path, the pressure reducing valve is used to reduce the pressure of the passing water flow, and the booster pump is used to pressurize the passing water flow. Preferably, a low-pressure switch is also provided before the filter element. When the raw water source is not supplying water, the low-pressure switch detects a pressure value lower than a set value and shuts down the entire water purification system.

[0037] Water purification component 2 is connected to the outlet end of water inlet component 1. Specifically, the inlet of the water purification pipe is connected to the outlet of the water inlet pipe, and the outlet of the water purification pipe is connected to a water faucet (not shown). The water purification pipe is equipped with a second inlet valve (or water purification solenoid valve) and a reverse osmosis membrane filter element (i.e.,... Figure 1 The system includes an RO filter, a water purification detection switch, and a post-treatment filter. A second inlet valve is used to shut off or connect the water supply. The water purification detection switch detects whether the user has taken purified water. The specific structure of the water purification detection switch is not limited; preferably, a unidirectional high-pressure switch is used. When the user has not taken purified water, the water pressure in the purified water pipe is higher than a set value, at which point the high-pressure switch is triggered, thereby shutting down the entire water purification system.

[0038] The sparkling water assembly 4 is connected to the outlet end of the water inlet assembly 1. Specifically, the inlet of the sparkling water pipe is connected to the outlet of the water inlet pipe, and the outlet of the sparkling water pipe is connected to the sparkling water faucet (not shown). A second one-way valve, a mixing tank, an aerator, and a sparkling water detection switch are connected sequentially on the sparkling water pipe. The second one-way valve is used to fix the water flow direction, the mixing tank is used to mix water and gas together, the aerator can turn the water-gas mixture in the mixing tank into sparkling water, and the sparkling water detection switch is used to detect whether the user has taken sparkling water.

[0039] The concentrate assembly 3 is connected to the concentrate outlet of the water purification assembly 2. Specifically, the inlet of the concentrate pipe is connected to the concentrate port of the reverse osmosis membrane filter element, facilitating the release of the concentrate produced by the reverse osmosis membrane filter element. The concentrate pipe is equipped with a concentrate valve and a second solenoid valve. The concentrate valve controls the concentrate flow rate; when the valve is open, the concentrate flows normally; when closed, a small hole remains, allowing concentrate to still flow through, but at a lower flow rate (the specific flow rate is not limited). The second solenoid valve controls the opening and closing of the concentrate pipe.

[0040] An air-filling pipe 31 connects the concentrate assembly 3 and the water inlet assembly 1. To simplify the structure and reduce costs, the existing return pipe can be reused as the air-filling pipe 31. That is, the air-filling pipe 31 can serve as both a return pipe to bring the concentrate back to the water inlet pipe and a supplementary air pipe to fill the water inlet pipe with air or a water-air mixture. Preferably, before mixing with the water in the water inlet assembly 1, the concentrate in the concentrate assembly 3 is first pre-mixed with air, and then the water-air mixture is mixed with the water in the water inlet assembly 1, resulting in a large output of bubble water and high production efficiency.

[0041] The specific structure for forming a water-air mixture in the aeration pipe 31 is not limited. Preferably, the water purification system also includes an air intake component 6. The water-air component 6, the concentrate pipe, and the aeration pipe 31 are connected at the same node. The air intake component 6 can inject air into the aeration pipe 31 through the concentrate pipe. The air can enter the water inlet pipe through the aeration pipe 31, or it can be initially mixed with the concentrate in the concentrate component 3 to form a water-air mixture. The water-air mixture enters the water inlet pipe through the aeration pipe 31.

[0042] The air intake assembly 6 preferably includes an air pump and a first one-way valve. A control valve assembly is provided on the air filling line 31. The gas generated by the air pump can smoothly enter the water inlet pipe together with the concentrated water in the concentrated water assembly 3 through the air filling line 31.

[0043] The control valve assembly preferably includes a third check valve and a third solenoid valve. The third check valve controls the direction of water flow in the aeration pipe 31 to prevent backflow. The third solenoid valve controls the opening and closing of the aeration pipe 31. When bubble water needs to be prepared, the aeration pipe 31 is opened, allowing air or a water-air mixture to enter the water inlet pipe of the water inlet assembly 1. When preparing purified water, the aeration pipe 31 is closed to avoid affecting normal purified water preparation.

[0044] It should be noted that, for ease of viewing, Figure 1 The dashed boxes only circle the main structures of each component. Some parts that are far away are not in the dashed boxes, but with the explanation in the manual, it does not affect those skilled in the art from clearly and accurately understanding the technical solution.

[0045] When the water purification system produces sparkling water, the water stored in the water purification component 2 is drawn into the aeration pipe 31. The water stored in the water purification component 2 and the gas in the aeration pipe 31 form a water-gas mixture. The water-gas mixture is then mixed with the raw water in the water inlet pipe and sent to the booster pump. After being pressurized, it enters the sparkling water component 4 to produce sparkling water.

[0046] The concentrated water after filtration by the filter element of inlet water component 1 and purification water component 2 has only a slightly higher content of calcium and magnesium ions; it is not wastewater. Introducing this concentrated water into inlet water component 1 for the preparation of sparkling water will not significantly reduce the quality of the sparkling water. The resulting sparkling water can meet the quality requirements of various applications (e.g., using a circulating pulse method to flush the RO membrane of the reverse osmosis filter element can extend the service life of the RO membrane) and improve water utilization. Compared with the existing single-gas inlet method, the water-gas mixture inlet method of this water purification system is more likely to produce sparkling water, with high preparation efficiency, large sparkling water output, and wide applicability.

[0047] Based on the above structure, the inlet water assembly 1 also includes a raw water quality detection device and a controller connected to it. The controller is connected to the concentrate assembly 3. The raw water quality detection device is preferably a total dissolved solids (TDS) detector, capable of detecting how many milligrams of dissolved solids are dissolved in a unit volume of water. The specific structure and installation location of the controller are not limited, as long as it can control the start / stop and parameter adjustment of each device, including the raw water quality detection device and the concentrate assembly 3. When the raw water quality in the inlet pipe reaches the set value (i.e., when the water quality is excellent), the second solenoid valve is intermittently closed to reduce the discharge of concentrate, thereby improving the overall recovery rate of the system. The recovery rate is steplessly and intelligently adjusted according to the water quality conditions during the use of the water purification system; that is, different water efficiency levels are used for different water quality areas, dynamically adjusting the water production rate of the purified water. For example, when the second solenoid valve is continuously open, the overall recovery rate of the water purification system is 66.6% (1:1). When the raw water quality is very good, during water production, the second solenoid valve closes for 1 second every 4 seconds, and the instantaneous recovery rate of the water purification system increases from 66.6% to 70%.

[0048] Because the concentrate pipe is connected to the inlet pipe through the aeration pipe 31, the concentrate valve and the second solenoid valve can be opened during periods of better water quality to send the concentrate in the concentrate pipe back to the inlet pipe to mix with the raw water, thus achieving an adjustable concentrate recovery rate.

[0049] The processed reverse osmosis membrane is immersed in a reverse osmosis membrane protectant solution to maintain its wettability and ensure its performance is not affected by the environment during storage. However, this protectant solution is highly susceptible to bacterial growth and can cause excessive oxygen consumption. The carbon rods (post-activated carbon) in the post-treatment filter cartridge have excellent adsorption properties. When a new machine is installed or the reverse osmosis membrane is replaced, a certain amount of protectant solution remains on the pure water side of the membrane after rinsing. If normal water production is then initiated, this protectant solution will flow into the post-treatment filter cartridge. The carbon rods will lose their effectiveness due to adsorption of the protectant solution, leading to excessive bacteria or excessive oxygen consumption in the entire machine.

[0050] To address this issue, the water purification system also includes a reverse osmosis flushing assembly 5. The reverse osmosis flushing assembly 5 includes a first solenoid valve and a fourth check valve sequentially mounted on a reverse osmosis flushing pipe. One end of the reverse osmosis flushing pipe is connected to the purified water outlet of the reverse osmosis membrane filter element, and the other end is connected to the concentrate assembly 3. Preferably, the other end of the reverse osmosis flushing pipe is connected to the concentrate pipe between the concentrate valve and the second solenoid valve.

[0051] When a new machine is installed or the reverse osmosis membrane filter cartridge is replaced, the machine automatically flushes the filter afterward. Figure 2As shown, the first inlet valve, the second inlet valve, the first solenoid valve, and the second solenoid valve are open, the third solenoid valve is closed, the air pump is not working, the booster pump is working, and both the purified water faucet and the aerated water faucet are closed. The first solenoid valve is open for a certain period (1 to 2 minutes), the machine produces water, and the protective liquid at the pure water end of the reverse osmosis membrane filter cartridge will pass through the first solenoid valve and be discharged from the concentrated water outlet, preventing the reverse osmosis membrane protective liquid from contaminating the activated carbon of the downstream filter cartridge.

[0052] This water purification system has both a purified water production mode and a bubble water production mode.

[0053] like Figure 3 As shown, in the water purification mode, the water purification detection switch detects that the user has taken purified water. The system control program controls the first water inlet valve, the second water inlet valve, and the second solenoid valve to open, while the concentrate valve, the first solenoid valve 1, and the third solenoid valve close. The booster pump starts, the air pump does not work, and the machine begins to produce purified water.

[0054] like Figure 4 As shown, in the sparkling water production mode, the sparkling water detection switch detects that the user has taken sparkling water, and the system control program controls the first inlet valve, the second inlet valve, the first solenoid valve, and the concentrate valve to close. The second inlet valve opens intermittently, the third solenoid valve opens, and the air pump and booster pump start working. Gas enters the aeration pipe 31 under the action of the air pump. Due to the negative suction effect of the booster pump, the residual water in the reverse osmosis membrane filter element is drawn into the aeration pipe 31. This residual water and the gas pumped in form a water-air mixture. This water-air mixture mixes with the raw water in the inlet pipe, flows through the booster pump for pressurization, then enters the mixing tank, and then passes through the bubble generator to form sparkling water.

[0055] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A water purification system, characterized in that, include: The water inlet assembly (1) includes a filter element, a first water inlet valve, a pressure reducing valve and a booster pump disposed on the water inlet pipe, wherein the first water inlet valve and the pressure reducing valve are connected in parallel and disposed between the filter element and the booster pump; A water purification component (2) is connected to the outlet end of the water inlet pipe, and the water purification component (2) is configured to purify raw water; A concentrate assembly (3) is connected to the concentrate outlet of the water purification assembly (2), and the concentrate assembly (3) is configured to release the concentrate generated by the water purification assembly (2); an air-filling pipe (31) is connected between the concentrate pipe of the concentrate assembly (3) and the inlet pipe of the inlet assembly (1), and the air-filling pipe (31) is used to allow air or a water-air mixture or concentrate from the concentrate pipe to enter the inlet pipe through the air-filling pipe (31); and, A bubble water assembly (4) is connected to the outlet end of the water inlet pipe, and the bubble water assembly (4) is configured to produce the water-air mixture into bubble water; The inlet water assembly (1) also includes a raw water quality detection device and a controller connected to it, and the controller is connected to the concentrate water assembly (3).

2. The water purification system according to claim 1, characterized in that, The water purification system also includes an air intake assembly (6), which, the concentrate pipe and the air supply pipe (31) are connected at the same node, and the air intake assembly (6) is configured to supply air into the concentrate pipe.

3. The water purification system according to claim 2, characterized in that, The air intake assembly (6) includes an air pump and a first one-way valve. A control valve assembly is provided on the air filling pipeline (31). The air generated by the air pump can enter the water inlet pipe through the air filling pipeline (31) or enter the water inlet pipe together with the concentrated water in the concentrated water pipe through the air filling pipeline (31).

4. The water purification system according to claim 3, characterized in that, The control valve assembly includes a third check valve and a third solenoid valve.

5. The water purification system according to any one of claims 2 to 4, characterized in that, The water purification system also includes a reverse osmosis flushing assembly (5), which includes a first solenoid valve and a fourth check valve arranged sequentially on the reverse osmosis flushing pipe. One end of the reverse osmosis flushing pipe is connected to the purified water outlet of the water purification assembly (2), and the other end of the reverse osmosis flushing pipe is connected to the concentrate pipe.

6. The water purification system according to claim 5, characterized in that, The concentrate assembly (3) includes a concentrate valve and a second solenoid valve arranged sequentially on the concentrate pipe, and the other end of the reverse osmosis flushing pipe is connected to the concentrate pipe between the concentrate valve and the second solenoid valve.

7. The water purification system according to claim 6, characterized in that, The air outlet of the air intake assembly (6) is connected to the concentrate pipe between the concentrate valve and the second solenoid valve.

8. The water purification system according to any one of claims 1 to 4, characterized in that, The sparkling water assembly (4) also includes a sparkling water detection switch, which is configured to detect whether the user has taken sparkling water and / or detect the amount of sparkling water dispensed.

9. The water purification system according to any one of claims 1 to 4, characterized in that, The filter element includes a pre-filter and a post-processing filter, which are disposed in the same housing but are independent of each other.

10. A control method for a water purification system based on any one of claims 1 to 9, characterized in that, When producing sparkling water, the first water inlet valve is closed and the booster pump is started. The water stored in the water purification component (2) is sucked into the air filling pipe (31). The stored water and the gas filled into the concentrated water pipe form a water-gas mixture. The water-gas mixture is mixed with the raw water in the water inlet pipe and then sent into the booster pump. After being pressurized, it enters the sparkling water component (4) to prepare sparkling water.

11. The control method for the water purification system according to claim 10, characterized in that, When the quality of the raw water in the inlet pipe reaches the set value, the concentrate component (3) is shut off to reduce the amount of concentrate discharged.

12. The control method for the water purification system according to claim 10, characterized in that, When a new water purification system is activated or the reverse osmosis membrane filter element of the water purification system is replaced, the water purification system automatically flushes, opens the first inlet valve, and no gas is charged into the inlet pipe of the inlet component (1) in the air-filling pipeline (31). The booster pump is started, and the outlet of the water purification component (2) and the outlet of the bubble water component (4) are closed. Start the first solenoid valve of the reverse osmosis flushing assembly (5) and the water purification assembly (2), and the water produced by the water purification assembly (2) enters the concentrate assembly (3) through the reverse osmosis flushing assembly (5).

13. The control method for the water purification system according to claim 10, characterized in that, When preparing purified water, open the first inlet valve and start the booster pump. No gas is charged into the inlet pipe of the inlet assembly (1) in the air filling pipeline (31).

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