Liquid slow-release strip-out device, control method and water purifier

Abstract

This application relates to a liquid slow-release carry-out device, control method, and water purifier. It includes: a Venturi device having an inlet end, an outlet end, and a negative pressure end; a first flow channel for the liquid to be treated to flow between the inlet end and the outlet end; and a second flow channel connected to the first flow channel at the negative pressure end; the Venturi device is connected in series on a liquid pipeline, allowing the liquid to be treated to flow through the first flow channel; a liquid tank for holding the functional liquid used to treat the internal cavity of the liquid treatment equipment; a connecting pipeline, one end of which is connected to the negative pressure end of the Venturi device, and the other end to the liquid tank; and a control valve disposed on the connecting pipeline for controlling the flow rate of the functional liquid; wherein, when the liquid to be treated flows through the Venturi device, a negative pressure zone is formed in the throat of the Venturi device. The technical solution of this application improves the reliability and treatment performance of the liquid treatment process.

Description

Technical Field

[0001] This application relates to the field of water purification technology, and in particular to a liquid slow-release carry-out device, control method and water purifier. Background Technology

[0002] Liquid treatment equipment is widely used in water treatment, chemical, food, and environmental protection fields. It typically includes a piping system for transporting the liquid to be treated and requires the introduction of specific functional liquids (such as cleaning agents, corrosion inhibitors, or additives) during operation to maintain equipment performance or improve treatment results. For example, the reverse osmosis membrane (RO membrane) in a water purifier easily accumulates inorganic scale (such as calcium carbonate and calcium sulfate), organic matter, and microorganisms on its surface during long-term operation. This leads to a decrease in reverse osmosis membrane flux and desalination rate, affecting system operating efficiency and treatment effect. Therefore, regular cleaning and maintenance of the reverse osmosis membrane are necessary.

[0003] Currently, reverse osmosis membrane cleaning methods are mainly divided into offline cleaning and online cleaning. Offline cleaning requires disassembling the reverse osmosis membrane, which is cumbersome, time-consuming, and labor-intensive, and can affect the normal operation of the system. Online cleaning often uses the method of directly injecting cleaning agents, which has problems such as poor cleaning effect. At the same time, existing online cleaning devices have complex structures and high costs, making it difficult to meet the maintenance needs of small and medium-sized reverse osmosis systems.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this application and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Summary of the Invention

[0005] In view of this, this application provides a liquid slow-release carry-out device, control method and water purifier to solve at least one problem existing in the prior art.

[0006] To achieve the above objectives, the technical solution of this application is implemented as follows: In a first aspect, embodiments of this application provide a liquid slow-release carry-out device for use in a liquid processing apparatus, the liquid processing apparatus including a liquid pipeline through which the liquid to be processed flows, and the liquid slow-release carry-out device comprising: A Venturi device has an inlet end, an outlet end, and a negative pressure end; a first flow channel for the liquid to be treated is provided between the inlet end and the outlet end, and a second flow channel connected to the first flow channel is provided at the negative pressure end; the Venturi device is connected in series to the liquid pipeline, so that the liquid to be treated flows through the first flow channel. A liquid tank for holding a functional liquid that is used to treat the interior cavity of the liquid processing equipment; A connecting pipe is provided, with one end connected to the negative pressure end of the Venturi device and the other end connected to the liquid tank. A control valve, which is installed on the connecting pipeline, is used to control the flow rate of the functional liquid; When the liquid to be treated flows through the Venturi device, a negative pressure zone is formed in the throat of the Venturi device. Under the action of negative pressure, the functional liquid is drawn into the Venturi device through the connecting pipe, mixes with the liquid to be treated, and then enters the liquid pipeline.

[0007] In an optional embodiment, the device further includes a flow sensor disposed on the liquid pipeline for detecting the flow rate of the liquid to be treated; the control valve is a proportional control valve, the opening of which is adjusted according to the detection signal of the flow sensor so that the amount of functional liquid added is proportional to the flow rate of the liquid to be treated.

[0008] In one alternative embodiment, the flow sensor is an electromagnetic flow meter or a turbine flow meter, and the flow sensor is located upstream or downstream of the Venturi device.

[0009] In an optional embodiment, the device further includes a timer controller electrically connected to the control valve, which is used to control the opening and closing of the control valve according to a preset opening duration, closing duration, and number of cycles.

[0010] In one alternative embodiment, the Venturi device includes at least two Venturi units connected in series along the flow direction of the liquid pipeline, and each Venturi unit is connected to an independent liquid tank and the connecting pipeline.

[0011] In one alternative embodiment, the throat diameters of the at least two Venturi units decrease sequentially, thereby increasing the negative pressure value generated by each Venturi unit along the liquid flow path to achieve gradient dosing of the functional liquid.

[0012] In one alternative embodiment, the throat of the venturi device is provided with an adjustment mechanism for adjusting the flow cross-sectional area of ​​the throat to change the negative pressure value of the negative pressure zone.

[0013] In one optional embodiment, the adjusting mechanism includes an adjusting screw and a conical valve disc. The adjusting screw is threadedly connected to the conical valve disc. Rotating the adjusting screw can cause the conical valve disc to move axially along the throat, thereby changing the flow cross-sectional area of ​​the throat.

[0014] In one optional embodiment, a filter is provided on the connecting pipeline, the filter being located between the liquid tank and the control valve, for filtering solid particles in the functional liquid and reducing clogging of the negative pressure end of the Venturi device.

[0015] In one alternative embodiment, there are multiple liquid tanks, each of which is connected to the negative pressure end of the Venturi device via an independent connecting pipe and a control valve, for simultaneously or alternately adding different types of functional liquids.

[0016] In an optional embodiment, the device further includes a control unit that controls the opening and closing of the control valve corresponding to each liquid tank, and the control unit automatically switches between different types of functional liquids according to a preset dosing program or real-time detected water quality parameters.

[0017] In one optional embodiment, the liquid tank is equipped with a stirring device for stirring the functional liquid before it is added, so that the components of the functional liquid are evenly distributed.

[0018] Secondly, embodiments of this application provide a liquid sustained-release carryover control method, including: Select the type of functional liquid to be contained in the liquid tank based on the type of contamination inside the liquid handling equipment. The opening degree of the control valve is set according to the degree of contamination inside the liquid handling equipment. The liquid to be processed is introduced into the liquid pipeline, which creates a negative pressure in the throat of the Venturi device, thereby carrying out the functional liquid in the liquid tank.

[0019] In an optional embodiment, setting the opening degree of the control valve according to the degree of contamination of the liquid handling equipment cavity includes: If the standard water production rate decreases by ≤10% or the desalination rate decreases by ≤5%, adjust the opening of the control valve to 30%~50%. If the standard water production rate decreases by more than 15% or the desalination rate decreases by more than 10%, adjust the opening of the control valve to 70%~80%.

[0020] Thirdly, embodiments of this application provide a water purifier, including a pretreatment unit, a reverse osmosis unit, and a posttreatment unit, wherein the reverse osmosis unit includes any of the liquid slow-release carry-out devices described above.

[0021] The liquid slow-release carry-out device, control method, and water purifier provided in this application include: a Venturi device having an inlet end, an outlet end, and a negative pressure end; a first flow channel for the liquid to be treated to flow between the inlet end and the outlet end, and a second flow channel connected to the first flow channel at the negative pressure end; the Venturi device being connected in series with a liquid pipeline so that the liquid to be treated flows through the first flow channel; a liquid tank for holding a functional liquid for treating the internal cavity of a liquid treatment device; a connecting pipeline, one end of which is connected to the negative pressure end of the Venturi device, and the other end of which is connected to the liquid tank; and a control valve disposed on the connecting pipeline for controlling the flow rate of the functional liquid; wherein, when the liquid to be treated flows through the Venturi device, a negative pressure zone is formed in the throat of the Venturi device. As can be seen, the liquid slow-release carry-out device, control method, and water purifier of this application embodiment achieve slow-release carry-out of the functional liquid by connecting the Venturi device in series in the liquid pipeline and utilizing the negative pressure zone naturally formed by the main liquid flow through its throat, which allows the functional liquid to be automatically drawn in and mixed with the main liquid flow without additional power. This structure not only simplifies the system composition but also makes the amount of functional liquid carried out adaptively change with the flow rate of the main liquid flow, improving the stability of addition and the uniformity of mixing, and effectively enhancing the reliability and processing performance of the liquid treatment process.

[0022] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0023] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1 A schematic diagram of the liquid sustained-release carry-out device provided in the embodiments of this application; Figure 2 for Figure 1 A magnified view of a portion of point A in the middle; Figure 3 This is a schematic flowchart of the liquid sustained-release carry-out control method provided in the embodiments of this application.

[0024] Explanation of reference numerals in the attached figures: 10. Venturi device; 11. Inlet end; 12. Outlet end; 13. Negative pressure end; 14. Throat; 20. Liquid tank; 30. Connecting pipeline; 40. Control valve; 50. Flow sensor; 60. Filter. Detailed Implementation

[0025] To make the technical solutions and beneficial effects of this application more obvious and understandable, the technical solutions in the embodiments of this application are clearly and completely described below by listing specific embodiments. Obviously, the embodiments of this application are not exhaustive, and the described embodiments are only some embodiments of this application, not all embodiments.

[0026] The exemplary embodiments disclosed in this application will now be described in more detail with reference to the accompanying drawings, providing detailed structures and steps to illustrate the technical solution of this application. Note that the drawings are not necessarily drawn to scale, and local features may be enlarged or reduced to more clearly show the details of the local features.

[0027] 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 pertains. The terminology used herein is for the purpose of describing particular embodiments only and should not be construed as limiting the technical solutions of this application.

[0028] The following description provides numerous specific details to offer a more thorough understanding of this application. However, it will be apparent to those skilled in the art that this application can be practiced without one or more of these details. To clearly define the inventive concept of this application and avoid confusion with its content, technical features well-known in the art and conventionally understood by those skilled in the art are not elaborated upon. Specifically, this document does not fully list all features of actual embodiments, nor does it provide a detailed description of well-known functions and structures.

[0029] The inventors of this application discovered during the research and development that, while online cleaning avoids disassembling membrane modules during the maintenance of reverse osmosis water purification systems, directly injecting cleaning agents often results in uncontrollable agent release, easily leading to excessively high local concentrations. This can damage the reverse osmosis membrane and cause low agent utilization. Furthermore, even with the introduction of additional driving devices (such as water pumps) to facilitate agent delivery, the uniform distribution of the cleaning solution within the flow channel is difficult to achieve due to limitations in the pipeline structure and the relative position of the agent injection point and the membrane module, thus affecting the overall cleaning effect. Simultaneously, the introduction of additional driving devices typically makes the online cleaning structure more complex and costly, making it difficult to balance performance and practicality; this problem is particularly prominent in small and medium-sized reverse osmosis systems.

[0030] Therefore, through further research and development, the inventors proposed the following technical solution.

[0031] This application provides a liquid slow-release carry-out device for use in a liquid processing apparatus, the liquid processing apparatus including a liquid pipeline for flowing the liquid to be processed. (Reference) Figure 1 and Figure 2 The liquid slow-release carry-out device includes: The Venturi device 10 has an inlet end 11, an outlet end 12 and a negative pressure end 13; a first flow channel for the liquid to be treated is provided between the inlet end 11 and the outlet end 12, and the negative pressure end 13 is connected to a second flow channel that communicates with the first flow channel; the Venturi device 10 is connected in series to the liquid pipeline, so that the liquid to be treated flows through the first flow channel. Liquid tank 20, which is used to hold functional liquid for treating the interior cavity of the liquid processing equipment; Connecting pipe 30, one end of which is connected to the negative pressure end 13 of the Venturi device 10, and the other end is connected to the liquid tank 20; A control valve 40 is provided on the connecting pipe 30 and is used to control the flow rate of the functional liquid; When the liquid to be treated flows through the Venturi device 10, a negative pressure zone is formed in the throat 14 of the Venturi device 10. Under the action of negative pressure, the functional liquid is drawn into the Venturi device 10 through the connecting pipe 30, mixes with the liquid to be treated, and then enters the liquid pipeline.

[0032] Without limitation, this application provides a liquid slow-release carry-out device. A "liquid slow-release carry-out device" refers to a device that can extract liquid from a storage location and introduce it into a target system in a controlled, non-instantaneous manner, thereby enabling the slow and uniform addition of functional liquids.

[0033] "Venturi device 10" refers to a pipe fitting that operates on the principle of increased flow velocity and decreased pressure when fluid flows through a contraction section. It has an inlet end 11, an outlet end 12, and a negative pressure end 13. When the liquid to be treated flows through, the Venturi device 10 uses the fluid's own energy to generate negative pressure, requiring no additional power. "First flow channel" refers to the internal channel from the inlet end 11 to the outlet end 12 through which the liquid to be treated passes, ensuring the smooth flow of the mainstream liquid. "Second flow channel" refers to the internal channel connecting the negative pressure end 13 to the first flow channel, providing a path for the functional liquid to be drawn in. "Series connection" means connecting the Venturi device 10 in series to the liquid pipeline, so that all the liquid to be treated flows through its first flow channel, allowing the negative pressure to act on all the mainstream liquid and avoiding bypass losses.

[0034] "Liquid Tank 20" is a container used to store functional liquids as a source of functional liquids. "Functional liquids" refer to liquids with specific processing functions, such as cleaning agents and scale inhibitors, which can achieve the desired chemical or physical effects on the internal cavity of liquid processing equipment.

[0035] "Connecting pipe 30" refers to the pipe connecting the negative pressure end 13 of the Venturi device 10 to the liquid tank 20, forming a delivery channel for the functional liquid. "Control valve 40" refers to a valve installed on the connecting pipe 30 that can adjust or cut off the fluid flow rate, used to control the timing and amount of functional liquid addition.

[0036] When the liquid to be treated flows through the Venturi device 10, a negative pressure zone is formed in its throat 14 due to the increased flow velocity, and this negative pressure generates a suction force. Under the action of the pressure difference, the functional liquid is drawn into the Venturi device 10 through the connecting pipe 30, and this process does not require pumping. The functional liquid and the liquid to be treated are thoroughly mixed inside the Venturi device 10 and in the downstream pipe to form a uniformly concentrated treatment solution.

[0037] Overall, the above features work synergistically to automatically draw out the functional liquid using the negative pressure generated by the Venturi effect, and adjust the flow rate through the control valve 40, thereby achieving passive, controllable, and slow-release of the functional liquid, avoiding additional power equipment, and reducing costs and energy consumption.

[0038] Specifically, the liquid treatment equipment can be a reverse osmosis system, the liquid to be treated can be raw water, the liquid pipeline can be the inlet pipeline of the reverse osmosis system, and the functional liquid can be an acidic or alkaline cleaning and protective agent. A Venturi device 10 is connected in series to the inlet pipeline of the reverse osmosis system. When water flows through the Venturi device 10, a negative pressure is generated in the throat 14, drawing the cleaning and protective agent from the liquid tank 20 and mixing it to form a uniformly concentrated cleaning solution before it enters the reverse osmosis system. Specifically, the reverse osmosis system includes a reverse osmosis membrane. In other equipment, the reverse osmosis system can also be a reverse osmosis unit. In the following description, the expressions may not be strictly distinguished and may be expressed as reverse osmosis system, reverse osmosis membrane, or reverse osmosis unit. This expression method is mainly for the convenience and readability of the technical description. Those skilled in the art should correctly understand the specific physical meaning based on the specific technical content, context, and actual application scenario. The liquid slow-release carry-out device of this application embodiment connects the Venturi device 10 in series in the liquid pipeline, and utilizes the negative pressure zone naturally formed in its throat by the main liquid flow to automatically draw in the functional liquid and mix it with the main liquid flow without additional power, thereby realizing the slow-release carry-out of the functional liquid. This structure not only simplifies the system composition, but also makes the carry-out amount of functional liquid adaptively change with the flow rate of the main liquid flow, improving the stability of addition and the uniformity of mixing, and effectively improving the reliability and processing performance of the liquid treatment process.

[0039] In some other embodiments of this application, the device may further include a flow sensor 50, which is disposed on the liquid pipeline for detecting the flow rate of the liquid to be treated; the control valve 40 may be a proportional control valve, the opening of which is adjusted according to the detection signal of the flow sensor 50 so that the amount of functional liquid added is proportional to the flow rate of the liquid to be treated.

[0040] Non-limitingly, the device may include a flow sensor 50 and a proportional control valve. "Flow sensor 50" refers to a component capable of detecting the instantaneous flow rate of the liquid to be treated in a liquid pipeline, providing real-time flow data. "Proportional control valve" refers to a proportional regulating valve whose opening degree can continuously change with the input electrical signal, enabling precise and continuous regulation of the functional liquid flow rate. "Opening degree adjusted according to the detection signal" means that the proportional control valve automatically changes the valve core position after receiving the signal from the flow sensor 50, maintaining a fixed proportional relationship between the dosage of the functional liquid and the flow rate of the liquid to be treated. These features work together to maintain a constant concentration of the functional liquid: even if the mainstream liquid flow rate fluctuates, the concentration of the mixed liquid remains stable.

[0041] Specifically, when the flow rate of the liquid to be treated increases, the flow sensor 50 detects the increase, and the proportional control valve, upon receiving the signal, increases its opening accordingly, increasing the dosage of the functional liquid. When the flow rate decreases, the opening decreases synchronously. This ensures that the mixing ratio of the functional liquid and the liquid to be treated remains constant under most flow conditions.

[0042] Furthermore, this proportional control mechanism can be combined with the PID (Proportional-Integral-Derivative Controller) algorithm to achieve higher precision closed-loop control and eliminate dosing errors caused by pipeline pressure fluctuations or liquid level changes in liquid tank 20.

[0043] In some other embodiments of this application, the flow sensor 50 may be an electromagnetic flow meter or a turbine flow meter, and the flow sensor 50 may be located upstream or downstream of the Venturi device 10.

[0044] In general, the "electromagnetic flow meter" uses the Faraday principle of electromagnetic induction to measure the flow rate of conductive liquids, offering high accuracy and no pressure loss. The "turbine flow meter" uses the principle that impeller speed is proportional to flow velocity to measure flow rate, providing fast response and good repeatability. "Set up upstream or downstream of the Venturi device 10" means that the flow sensor 50 can be installed on the inlet or outlet pipe of the Venturi device 10, providing flexibility in installation location to adapt to different pipe layouts and measurement needs.

[0045] In some other embodiments of this application, the device may further include a timer controller electrically connected to the control valve 40, for controlling the opening and closing of the control valve 40 according to a preset time period, the time period including the opening duration, the closing duration, and the number of cycles.

[0046] Without limitation, the device may also include a timer controller. A "timer controller" refers to an electronic control module capable of outputting switching signals according to a preset time sequence, enabling automated sequential operation of the control valve 40. The "preset time period" refers to the user-programmable opening duration, closing duration, and number of cycles, providing a flexible intermittent dosing mode.

[0047] These features allow functional liquids to be added in a pulse pattern of "addition-stop-re-addition", which helps to improve the utilization rate and effectiveness of functional liquids.

[0048] For example, during the cleaning process of a reverse osmosis system, the on-time can be set to 5 minutes and the off-time to 10 minutes, with the cycle repeated 3 times. In this way, the cleaning and protective agent is first added for 5 minutes, then the addition is stopped to allow the agent to remain on the membrane surface and react for 10 minutes, and then the next addition is made, realizing a "cleaning-soaking-cleaning" cyclic cleaning process.

[0049] In some other embodiments of this application, the Venturi device 10 may include at least two Venturi units connected in series along the flow direction of the liquid pipeline, and each Venturi unit is connected to an independent liquid tank 20 and the connecting pipeline 30.

[0050] Without limitation, the device can be expanded into a series structure of at least two Venturi units 10. A "Venturi unit" refers to a single, independent Venturi tube assembly, each capable of generating negative pressure independently. "Series connection" means that multiple units are connected end-to-end in the direction of liquid flow, with the outlet of one unit connected to the inlet of the next, and the liquid to be treated flowing sequentially through each unit. "Independent liquid tanks 20 and connecting pipes 30" means that each Venturi unit is individually connected to its own storage tank and delivery pipe, allowing each unit to be dispensed with the same or different types of functional liquids without interference.

[0051] Overall, this structure can enable the stepwise, sequential, or combined addition of various functional liquids.

[0052] For example, in the cleaning of a reverse osmosis system, an acid tank can be connected to the first Venturi unit and an alkali tank to the second unit. The water first passes through the first unit to mix with acid for acid washing, and then passes through the second unit to mix with alkali for alkali washing, realizing a one-stop cleaning process of acid first and then alkali.

[0053] In some other embodiments of this application, the throat diameters of the at least two Venturi units decrease sequentially, thereby increasing the negative pressure value generated by each Venturi unit along the liquid flow path to achieve gradient dosing of the functional liquid.

[0054] Unrestricted, this device can achieve different operational purposes by defining the variation pattern of the throat diameter. "Subsequently decreasing throat diameter" means that along the liquid flow direction, the throat diameter of each subsequent Venturi unit is smaller than the previous one, resulting in a sequential increase in flow velocity. "Subsequently increasing negative pressure" means that the smaller the throat diameter, the greater the absolute value of the negative pressure generated, and the stronger the suction force of the downstream unit. "Gradual dosing" means that units at different locations have different suction capacities, which can adapt to different dosing resistances or achieve differentiated dosing amounts.

[0055] This feature solves the problem of suction difficulties in downstream units of series structures due to increased pipeline pressure drop.

[0056] Specifically, in the series of Venturi units, the first unit has a larger throat diameter, which generates a smaller negative pressure and is suitable for aspirating low-viscosity or low-flow-rate drugs; the second unit has a smaller throat diameter, which generates a larger negative pressure and can overcome the back pressure of the mixed liquid, so that the second drug can also be reliably aspirated.

[0057] In some other embodiments of this application, the throat 14 of the Venturi device 10 may be provided with an adjustment mechanism for adjusting the flow cross-sectional area of ​​the throat to change the negative pressure value of the negative pressure zone.

[0058] Non-limitingly, the device may include an adjustment mechanism (not shown in the figure) in the throat 14. The "adjustment mechanism" refers to a movable part or structure capable of changing the minimum flow cross-sectional area of ​​the throat, enabling continuous or stepped adjustment of the flow area. By changing the cross-sectional area to adjust the flow rate of the fluid in the throat 14, the magnitude of the negative pressure is altered, making the suction capacity of the Venturi device 10 adjustable to accommodate functional liquids of different viscosities or different dosing flow rates.

[0059] Specifically, when it is necessary to add high-viscosity functional liquids, the cross-sectional area of ​​the throat is increased by adjusting the mechanism to reduce the flow rate and negative pressure, so as to avoid excessive liquid suction or cavitation caused by excessive negative pressure; when it is necessary to enhance the suction force, the cross-sectional area is reduced and the negative pressure is increased.

[0060] In some other embodiments of this application, the adjusting mechanism may include an adjusting screw and a conical valve disc, wherein the adjusting screw is threadedly connected to the conical valve disc, and rotating the adjusting screw can cause the conical valve disc to move axially along the throat, thereby changing the flow cross-sectional area of ​​the throat.

[0061] Non-limiting, this device can provide one specific implementation of the adjusting mechanism. The "adjusting screw" refers to a rod-shaped part with external threads that converts rotational motion into axial linear motion. The "conical valve disc" refers to a valve core component with a conical outer surface, whose radial dimension differs depending on its axial position. The "threaded connection" means that the adjusting screw and the conical valve disc are engaged by internal and external threads, and the conical valve disc moves axially when the screw is rotated. As the conical valve disc moves, the size of the annular gap between it and the inner wall of the throat changes, thereby achieving precise and continuous adjustment of the flow area.

[0062] In some other embodiments of this application, a filter 60 may be provided on the connecting pipe 30. The filter 60 is located between the liquid tank 20 and the control valve 40 and is used to filter solid particles in the functional liquid to reduce clogging of the negative pressure end 13 of the Venturi device 10.

[0063] Non-restrictive, the device can be equipped with a filter 60 on the connecting pipe 30. "Filter 60" refers to an element with an internal filter screen or porous media capable of intercepting solid particles in the flowing liquid, thus purifying the functional liquid. "Located between the liquid tank 20 and the control valve 40" means that the functional liquid flows from the tank through the filter 60 before reaching the control valve 40, protecting the control valve 40 and the downstream venturi device 10 from impurities. By intercepting particulate matter in advance, the probability of blockage of the small channels at the negative pressure end 13 is reduced, improving the operational reliability and maintenance cycle of the device.

[0064] Specifically, when the functional liquid is a self-prepared cleaning agent, it may contain undissolved powder or foreign impurities. Filter 60 can intercept these particles, preventing them from entering the negative pressure end 13 or throat 14 of the venturi device 10 and causing blockage.

[0065] In some other embodiments of this application, there may be multiple liquid tanks 20, each of which is connected to the negative pressure end 13 of the Venturi device 10 via an independent connecting pipe 30 and a control valve 40, for simultaneously or alternately adding different types of functional liquids.

[0066] Non-restricted, the device can be configured with multiple liquid tanks 20 connected in parallel. "Multiple liquid tanks 20" refers to two or more storage containers capable of storing different types of functional liquids. "Independent connecting lines 30 and control valves 40" means that each liquid tank 20 has its own dedicated lines and valves, allowing independent control of the dosing process for each tank. "Simultaneous dosing" means that multiple control valves 40 are opened simultaneously, allowing different functional liquids to be mixed in the connecting lines 30 or the Venturi device 10 and then drawn in together, achieving online mixing of compound reagents. "Alternating dosing" means that different control valves 40 are opened sequentially at different times, achieving step-by-step processing.

[0067] For example, tank A can be set to contain pickling solution, tank B to contain alkaline pickling solution, and tank C to contain disinfectant. When combined cleaning is required, tanks A and C are turned on simultaneously; when step-by-step cleaning is required, tank A is turned on first, followed by tank B.

[0068] In some other embodiments of this application, the device may further include a control unit, which controls the opening and closing of the control valve 40 corresponding to each of the liquid tanks 20, and automatically switches between different types of functional liquids according to a preset dosing program or real-time detected water quality parameters.

[0069] Unrestricted, the device also includes an intelligent control unit. The "control unit" refers to an electronic module with logic operation and output control functions, such as a Programmable Logic Controller (PLC) or a microcontroller, capable of automated decision-making. The "preset dosing program" refers to the time sequence or process steps input by the user beforehand, which can automatically switch according to a fixed process. The "real-time monitored water quality parameters" refer to dynamic data acquired through online sensors (such as pH meters and conductivity meters), enabling closed-loop adaptive control. "Automatic switching" means that the control unit automatically opens or closes the corresponding control valve 40 according to the program or parameters, completing the sequential dosing of multiple functional liquids without manual intervention.

[0070] For example, a program of "10 minutes of alkaline washing → 2 minutes of water washing → 10 minutes of acid washing" can be preset, and the control unit will automatically open the alkaline tank valve, wait, close, open the water flushing valve, close, and open the acid tank valve in sequence. Alternatively, when the online pH sensor detects that the pH value of the cleaning solution is higher than the target value, the control unit will automatically open the acid tank valve for minor adjustment.

[0071] In some other embodiments of this application, the liquid tank 20 may be equipped with a stirring device for stirring the functional liquid before it is added, so that the components of the functional liquid are evenly distributed.

[0072] Unrestricted, the device may include a stirring mechanism inside the liquid tank 20. A "stirring mechanism" refers to a mechanical or fluid component (such as a stirring paddle, magnetic stir bar, or circulating pump) capable of agitating and mixing the liquid within the tank, preventing solid sedimentation or component stratification. "Stirring before addition" means performing a stirring operation before or simultaneously with opening the control valve 40, ensuring that the functional liquid drawn from the tank has a uniform concentration and composition.

[0073] Specifically, for suspension-type functional liquids (such as cleaning agents containing insoluble particles), the particles will settle to the bottom after standing, resulting in lower concentrations of the first liquid extracted and higher concentrations of the later extracted liquid. Starting the stirring device before addition can resuspend the particles, ensuring the stability of the liquid composition throughout the addition process.

[0074] This application also provides a method for controlling liquid sustained-release carryover, such as... Figure 3 As shown, the method includes: Step 801: Select the type of functional liquid to be contained in the liquid tank based on the type of contamination in the inner cavity of the liquid handling equipment; Step 802: Set the opening degree of the control valve according to the degree of contamination inside the liquid processing equipment; Step 803: Introduce the liquid to be processed into the liquid pipeline to create negative pressure in the throat of the Venturi device, thereby carrying out the functional liquid in the liquid tank.

[0075] Without limitation, the phrase "selecting functional liquid types according to the type of contaminant" means matching functional liquids with targeted effects based on the chemical properties of contaminants in liquid treatment equipment (such as reverse osmosis systems): when the contaminants are mainly inorganic scale (such as calcium carbonate and calcium sulfate), acidic cleaning and protective agents (such as citric acid solution) are selected; when the contaminants are mainly organic matter or biofilm, alkaline cleaning and protective agents (such as a mixture of sodium hydroxide and surfactant) are selected.

[0076] The phrase "setting the control valve opening according to the degree of contamination" refers to quantifying the severity of contamination by monitoring system operating performance parameters and adjusting the flow cross-sectional area of ​​the control valve accordingly to control the intake rate of the functional liquid. "Introducing the liquid to be treated" refers to activating the main liquid flow (such as raw water) of the liquid treatment equipment, allowing it to flow through the Venturi device. Utilizing the Venturi effect, a negative pressure zone is spontaneously formed in the throat, passively drawing in the functional liquid and achieving slow release without external power. These steps work synergistically to achieve on-demand, precise, and low-energy dosing of the cleaning operation.

[0077] Specifically, in a reverse osmosis system, the user first determines the type of membrane fouling (through historical water quality data or typical symptoms) and selects the corresponding reagent tank; then reads the system monitoring data to assess the degree of fouling; finally, the system is turned on and the control valve opening is set to initiate the slow-release cleaning process.

[0078] Furthermore, the control valve can be a proportional control valve, whose opening signal is automatically generated by the control unit according to preset logic to achieve fully automatic cleaning control.

[0079] In some other embodiments of this application, setting the opening degree of the control valve according to the degree of contamination of the liquid handling equipment cavity includes: If the standard water production rate decreases by ≤10% or the desalination rate decreases by ≤5%, adjust the opening of the control valve to 30%~50%. If the standard water production rate decreases by more than 15% or the desalination rate decreases by more than 10%, adjust the opening of the control valve to 70%~80%.

[0080] Without limitation, the "standardized permeate flow rate decrease" refers to the percentage decrease in current permeate flow rate corrected to the standard temperature (25°C) and pressure, relative to the initial operating baseline, used to characterize flux attenuation caused by inorganic scaling; the "desalination rate decrease" refers to the reduction in the actual desalination rate of the system (1 − permeate conductivity / feed water conductivity) relative to the initial value, used to characterize the damage to the membrane selective separation layer caused by organic / biological fouling. When either indicator meets the mild fouling threshold (permeate flow rate decrease ≤10% or desalination rate decrease ≤5%), it indicates mild fouling, and effective cleaning can be achieved with a lower opening degree (30%~50%); when either indicator reaches the severe fouling threshold (permeate flow rate decrease >15% or desalination rate decrease >10%), it indicates severe fouling, and the opening degree needs to be increased to 70%~80% to enhance the reagent dosing rate and ensure thorough cleaning. This criterion system covers both acid washing and alkaline washing scenarios, realizing a unified fouling degree-opening degree mapping rule.

[0081] Specifically, if the system is mainly used to remove hardness ions, the main monitoring focus is on the permeate flow rate; if the influent contains high levels of organic matter, the focus is on monitoring the desalination rate. Exceeding any of these parameters will trigger the corresponding cleaning mode and operating degree setting.

[0082] For example, if the permeate flow of a reverse osmosis system decreases by 12% (less than 15%), but the desalination rate decreases by 8% (>5% and <10%), it can be considered as moderately polluted. An opening degree between 50% and 70% can be selected, or the desalination rate can be used to determine that it is close to severe, and a 70% opening degree can be adopted.

[0083] Furthermore, based on the cleaning effect, the flow cross-sectional area of ​​the throat can be adjusted by regulating the mechanism to change the negative pressure value in the negative pressure zone, thereby further adjusting the flow rate of the functional liquid and improving cleaning efficiency. Details will not be elaborated here.

[0084] The technical solution of this application will be further described in detail below with reference to specific embodiments, so that those skilled in the art can understand it. The following description uses acid washing and alkaline washing as examples.

[0085] Example 1: Pickling Operation When inorganic scale (such as calcium carbonate or calcium sulfate) appears on the surface of the reverse osmosis membrane in a reverse osmosis system, causing a decrease in the membrane flux, the liquid slow-release carry-out device described in this application is used for acid washing. The specific steps are as follows: The first step is to install the device.

[0086] A Venturi device 10, matching the pipe diameter, is installed in series on the inlet pipe of the reverse osmosis system. The negative pressure end 13 of the Venturi device 10 is connected to a liquid tank (i.e., acid tank) containing acidic functional liquid via a connecting pipe 30. A corrosion-resistant control valve 40 (e.g., a solenoid valve) is installed on the connecting pipe 30. Seals are installed at all connections to ensure leak-free sealing. The acidic cleaning and protective agent loaded in the liquid tank can be a 2% citric acid solution with a pH value controlled between 2 and 3. This acidic cleaning and protective agent is suitable for the cleaning requirements of polyamide reverse osmosis membranes and can prevent damage to the membrane. A level gauge can be installed on the acidic functional liquid tank to display the remaining liquid level, which helps to ensure the continuity of the cleaning operation.

[0087] from Figure 1 As can be seen, the Venturi device 10 consists of two parts: the left side is the independent part of the Venturi device, and the right side is part of the inlet pipe of the reverse osmosis system. The corresponding throat 14 is fabricated in conjunction with the independent part of the Venturi device, and together with the independent part of the Venturi device, a complete throat 14 is formed. The two parts are connected by bolts, and bolt holes can be seen in the figure. Furthermore, from... Figure 1 It can also be seen that the connecting pipe 30 is detachably connected to the venturi device 10 and the liquid tank, and can be connected only when needed, which also makes it convenient to replace different types of functional liquids.

[0088] The second step is system startup.

[0089] Start the reverse osmosis system. The liquid to be treated (i.e., raw water) flows into the Venturi unit 10 from the inlet pipe. When the water flows through the constriction section of the Venturi unit 10 and reaches the throat, the flow velocity increases sharply, forming a stable negative pressure zone in the throat 14. The negative pressure value can be controlled between 0.02 MPa and 0.05 MPa. This negative pressure range allows the functional liquid to be stably drawn in, while avoiding excessive negative pressure that could cause water flow turbulence and affect the normal operation of the reverse osmosis system.

[0090] The third step is slow-release extraction.

[0091] Open control valve 40. Adjust the opening of control valve 40 according to the degree of fouling of the reverse osmosis membrane: if the fouling is severe, adjust the opening to 70%~80%; if the fouling is mild, adjust the opening to 30%~50%. Under the negative pressure of throat 14, the acidic functional liquid is slowly and evenly drawn into the Venturi device 10. The acidic functional liquid mixes thoroughly with the liquid to be treated flowing through the Venturi device 10, forming a uniformly concentrated cleaning solution (the concentration of the functional liquid in the cleaning solution can be controlled between 0.5% and 2%). This cleaning solution enters the reverse osmosis membrane along with the liquid to be treated, continuously cleaning the downstream reverse osmosis membrane. The acidic cleaning protectant dissolves the inorganic scale on the surface of the reverse osmosis membrane through complexation, and also has a certain bactericidal effect. The dissolved scale is discharged with the concentrate, thereby achieving the effects of descaling, sterilization, and restoring the reverse osmosis membrane flux.

[0092] Step four, the assignment is complete.

[0093] After rinsing for 30-60 minutes, observe the flux of the reverse osmosis membrane. When the flux returns to the normal range, close control valve 40, disassemble the acidic liquid tank, and flush the connecting pipe 30 and Venturi device 10 with clean water to remove residual functional liquid. Subsequently, the reverse osmosis system resumes normal operation.

[0094] Example 2: Alkali washing operation

[0095] When organic matter or microbial contamination (such as biofilm) appears on the surface of the reverse osmosis membrane, leading to a decrease in the desalination rate and an increase in the pressure differential, the liquid slow-release carry-out device described in this application is used for alkaline washing. The specific steps are as follows:

[0096] The first step is device switching.

[0097] Close control valve 40 and disassemble the liquid tank containing the acidic functional liquid. Install the liquid tank containing the alkaline functional liquid (i.e., the alkaline tank) onto the connecting pipe 30, ensuring a sealed connection between the liquid tank and the negative pressure end 13 of the Venturi device 10. The alkaline cleaning and protective agent loaded in the alkaline functional liquid tank can be a mixed solution of sodium hydroxide and surfactant with a pH of 10-12, used to decompose organic matter and remove biofilms. A level gauge can also be installed on the alkaline functional liquid tank to observe the remaining liquid level. All connections should be sealed to prevent leakage.

[0098] The second step is system startup.

[0099] Start the reverse osmosis system. The liquid to be treated (raw water) flows into the Venturi device 10, forming a negative pressure zone in the throat 14. The negative pressure value is also controlled between 0.02 MPa and 0.05 MPa to ensure the negative pressure is stable and to avoid uneven carry-out of the functional liquid.

[0100] The third step is slow-release extraction.

[0101] Open control valve 40 and adjust its opening degree according to the degree of fouling of the reverse osmosis membrane. Under negative pressure, alkaline functional liquid is slowly and evenly drawn into the Venturi device 10, mixing with the liquid to be treated to form a uniformly concentrated cleaning solution (the concentration of functional liquid in the cleaning solution can be controlled between 0.5% and 1.5%). The cleaning solution enters the reverse osmosis membrane, continuously cleaning the downstream reverse osmosis membrane. The alkaline cleaning and protective agent decomposes organic matter on the surface of the reverse osmosis membrane through a saponification reaction, simultaneously killing microorganisms and removing the biofilm. The decomposed contaminants are discharged with the concentrate, thereby restoring the flux and desalination rate of the reverse osmosis membrane.

[0102] Step four, the assignment is complete.

[0103] After rinsing for 40-80 minutes, test the desalination rate and flux of the reverse osmosis membrane. When the test values ​​reach the normal range, close control valve 40, disassemble the alkaline functional liquid tank, and rinse the connecting pipe 30 and Venturi device 10 with clean water to remove residual functional liquid. Subsequently, the reverse osmosis system resumes normal operation.

[0104] This application also provides a water purifier, including a pretreatment unit, a reverse osmosis unit, and a posttreatment unit, wherein the reverse osmosis unit includes the liquid slow-release carry-out device described above.

[0105] In a general sense, "water purifier" refers to a device capable of multi-stage filtration and purification of raw water to produce pure water. "Pre-treatment unit" refers to the filtration unit located before the reverse osmosis unit, such as polypropylene (PP) cotton or activated carbon filter cartridges, used to remove large particulate impurities and residual chlorine from the raw water, protecting the reverse osmosis membrane. "Post-treatment unit" refers to the unit located after the reverse osmosis membrane that improves taste (such as post-activated carbon), used to adsorb any potential odors and improve the quality of the output water. "Reverse osmosis unit including the aforementioned liquid slow-release carry-out device" means that the reverse osmosis unit of the water purifier integrates the aforementioned liquid slow-release carry-out device, enabling the water purifier to automatically add cleaning and protective agents or scale inhibitors online, which helps extend the life of the reverse osmosis membrane and reduces the frequency of user maintenance.

[0106] Overall, this water purifier achieves intelligent and automated maintenance of its core filter elements by integrating a slow-release carry-out device.

[0107] It should be noted that the various embodiments or implementation methods in this document can be described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Similar or identical parts between embodiments can be referred to mutually. It should be understood that in the various embodiments of this application, the embodiment numbers are merely for descriptive purposes and do not represent the superiority or inferiority of the embodiments.

[0108] Understandably, without conflict, the technical features in the technical solutions described in each embodiment can be arbitrarily combined to form new embodiments. For example, each structure in each embodiment can be implemented as an independent embodiment, and the structures can be arbitrarily combined; some or all of the structures in different embodiments can be arbitrarily combined. Each step in each embodiment can be implemented as an independent embodiment, and the steps can be arbitrarily combined; the order of the steps can be arbitrarily interchanged; some or all of the steps in different embodiments can be arbitrarily combined. Furthermore, regarding the table in the embodiments, each element, each row, or each column in the table can be implemented as an independent embodiment.

[0109] In this document, when the terms "embodiment," "implementation," or "example" are used, it means that the specific features described in connection with these implementations or examples are included in at least one implementation, embodiment, or example of this application. It should be noted that the illustrative expressions of the above terms do not necessarily refer to the same implementation, embodiment, or example. Furthermore, the specific features described, such as structures or steps, can be appropriately combined in any one or more implementations, embodiments, or examples.

[0110] In some embodiments, prefixes such as "first" and "second" are used merely to distinguish different descriptive objects and do not impose restrictions on the position, order, priority, or value of the descriptive objects. The description of the descriptive objects is given in the context of the embodiments, and the use of prefixes does not constitute unnecessary restrictions. For example, the numerical value of a descriptive object is not limited by ordinal numbers and can be one or more. Taking "first device" as an example, the numerical value of "device" can be one or more. Furthermore, objects modified by different prefixes can be the same or different. For example, if the descriptive object is "device," then "first device" and "second device" can be the same device or different devices, and their types can be the same or different. Describing "first" does not necessarily imply the existence of "second," and discussing "second" does not necessarily imply the existence of "first."

[0111] In some embodiments, unless otherwise stated, elements expressed in the singular, such as “a,” “the,” “the,” “the,” “the,” “the,” etc., may mean “one and only one,” or “one or more,” “at least one,” etc. In some embodiments, “multiple” means two or more.

[0112] In some embodiments, the terms “at least one,” “one or more,” “multiple,” etc., can be used interchangeably.

[0113] In some embodiments, the notation "at least one of A and B", "A and / or B", "A in one case, B in another", "A in one case, B in another", etc., may include the following technical solutions depending on the situation: in some embodiments, A (A is executed regardless of B); in some embodiments, B (B is executed regardless of A); in some embodiments, execution is selected from A and B (A and B are selectively executed); in some embodiments, both A and B are executed. The same applies when there are more branches such as A, B, C, etc.

[0114] In some embodiments, the notation "A or B" may include the following technical solutions, depending on the situation: in some embodiments, A (execution of A regardless of B); in some embodiments, B (execution of B regardless of A); in some embodiments, selective execution from A and B (A and B are selectively executed). The same applies when there are more branches such as A, B, and C.

[0115] In some embodiments, unless otherwise expressly defined, the terms "installation," "connection," "linking," "fixing," "setting," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection, an electrical connection, or a communication connection; it can be a direct connection or an indirect connection through an intermediate medium; it can also refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment according to the specific circumstances.

[0116] In some embodiments, the terms “center,” “longitudinal,” “lateral,” “length,” “width,” “thickness,” “height,” “up,” “down,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” “outer,” “clockwise,” and “counterclockwise” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only used for the purpose of simplifying the description of this application and do not indicate that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. That is, they should not be construed as limitations on this application.

[0117] In some embodiments, unless otherwise expressly defined, "above" or "below" the second feature can mean that the first and second features are in direct contact, or indirect contact via an intermediate medium, or that they are not in contact, but simply indicate that the horizontal level of the first feature is higher than that of the second feature. Furthermore, "above" or "below" the second feature can mean that the first feature is directly above or diagonally above, directly below, or diagonally below the second feature.

[0118] In some embodiments, spatial relation terms such as “upper” and “lower” may be used for convenience of description to describe the relationship of one element or feature shown in the figures to other elements or features. It should be understood that, in addition to the orientation shown in the figures, spatial relation terms are intended to also include different orientations of the device in use and operation. For example, if the device in the figures is flipped, the description of an element or feature “below” other elements or features will change it to “upper” other elements or features. Therefore, the exemplary terms “upper” and “lower” can include both upper and lower orientations. The device may also be otherwise oriented (rotated 90 degrees or otherwise), and the spatial descriptive terms used herein will be interpreted accordingly.

[0119] It should be understood that the above embodiments are merely illustrative of several implementation methods of this application and do not limit the scope of protection of this patent application. The above embodiments are all exemplary and are not intended to encompass all possible implementation methods included in the technical solutions of this application. Various modifications and changes can be made to the above embodiments without departing from the scope of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

Claims

1. A liquid slow-release carry-out device for use in a liquid processing equipment, the liquid processing equipment comprising a liquid pipeline for flowing the liquid to be processed, characterized in that, The liquid slow-release carry-out device includes: A Venturi device has an inlet end, an outlet end, and a negative pressure end; a first flow channel for the liquid to be treated is provided between the inlet end and the outlet end, and a second flow channel connected to the first flow channel is provided at the negative pressure end; the Venturi device is connected in series to the liquid pipeline, so that the liquid to be treated flows through the first flow channel. A liquid tank for holding a functional liquid that is used to treat the interior cavity of the liquid processing equipment; A connecting pipe is provided, with one end connected to the negative pressure end of the Venturi device and the other end connected to the liquid tank. A control valve, which is installed on the connecting pipeline, is used to control the flow rate of the functional liquid; When the liquid to be treated flows through the Venturi device, a negative pressure zone is formed in the throat of the Venturi device. Under the action of negative pressure, the functional liquid is drawn into the Venturi device through the connecting pipe, mixes with the liquid to be treated, and then enters the liquid pipeline.

2. The liquid slow-release carry-out device as described in claim 1, characterized in that, The device also includes a flow sensor, which is installed on the liquid pipeline to detect the flow rate of the liquid to be treated; the control valve is a proportional control valve, and its opening is adjusted according to the detection signal of the flow sensor so that the amount of functional liquid added is proportional to the flow rate of the liquid to be treated.

3. The liquid slow-release carry-out device as described in claim 2, characterized in that, The flow sensor is an electromagnetic flow meter or a turbine flow meter, and the flow sensor is located upstream or downstream of the Venturi device.

4. The liquid slow-release carry-out device as described in claim 1, characterized in that, The device also includes a timer controller, which is electrically connected to the control valve and is used to control the opening and closing of the control valve according to a preset opening duration, closing duration, and number of cycles.

5. The liquid slow-release carry-out device as described in claim 1, characterized in that, The Venturi device includes at least two Venturi units, which are connected in series along the flow direction of the liquid pipeline. Each Venturi unit is connected to an independent liquid tank and the connecting pipeline.

6. The liquid slow-release carry-out device as described in claim 5, characterized in that, The throat diameters of the at least two Venturi units decrease sequentially, thereby increasing the negative pressure value generated by each Venturi unit along the liquid flow path to achieve gradient dosing of the functional liquid.

7. The liquid slow-release carry-out device as described in claim 1, characterized in that, The venturi device has a throat with an adjustment mechanism for adjusting the flow cross-sectional area of ​​the throat to change the negative pressure value of the negative pressure zone.

8. The liquid slow-release carry-out device as described in claim 7, characterized in that, The adjusting mechanism includes an adjusting screw and a conical valve disc. The adjusting screw is threadedly connected to the conical valve disc. Rotating the adjusting screw can cause the conical valve disc to move along the axial direction of the throat, thereby changing the flow cross-sectional area of ​​the throat.

9. The liquid slow-release carry-out device as described in claim 1, characterized in that, A filter is installed on the connecting pipeline. The filter is located between the liquid tank and the control valve and is used to filter solid particles in the functional liquid to reduce clogging of the negative pressure end of the Venturi device.

10. The liquid slow-release carry-out device as described in claim 1, characterized in that, The liquid tanks are multiple, and each liquid tank is connected to the negative pressure end of the Venturi device through an independent connecting pipe and a control valve, for simultaneously or alternately adding different types of functional liquids.

11. The liquid slow-release carry-out device as described in claim 10, characterized in that, The device also includes a control unit, which controls the opening and closing of the control valve corresponding to each liquid tank. The control unit automatically switches between different types of functional liquids according to a preset dosing program or real-time detected water quality parameters.

12. The liquid slow-release carry-out device as described in claim 1, characterized in that, The liquid tank is equipped with a stirring device for stirring the functional liquid before it is added, so that the components of the functional liquid are evenly distributed.

13. A method for controlling liquid slow-release carryover, characterized in that, include: Select the type of functional liquid to be contained in the liquid tank based on the type of contamination inside the liquid handling equipment. The opening degree of the control valve is set according to the degree of contamination inside the liquid handling equipment. The liquid to be processed is introduced into the liquid pipeline, which creates a negative pressure in the throat of the Venturi device, thereby carrying out the functional liquid in the liquid tank.

14. The liquid slow-release carryover control method as described in claim 13, characterized in that, The step of setting the opening degree of the control valve according to the degree of contamination inside the liquid processing equipment includes: If the standard water production rate decreases by ≤10% or the desalination rate decreases by ≤5%, adjust the opening of the control valve to 30%~50%. If the standard water production rate decreases by more than 15% or the desalination rate decreases by more than 10%, adjust the opening of the control valve to 70%~80%.

15. A water purifier, characterized in that, It includes a pretreatment unit, a reverse osmosis unit, and a posttreatment unit, wherein the reverse osmosis unit includes the liquid slow-release carry-out device according to any one of claims 1-12.

Images