Capillary set flow measuring device

Abstract

This application relates to a capillary flow measurement device, including an inert gas pipeline connected to an inert gas source. The inert gas pipeline includes a first branch and a second branch for transmitting inert gas, respectively. A liquid storage module is connected to the first branch and contains a cleaning liquid. A first two-position three-way valve includes two input terminals and one output terminal. The liquid storage module and the second branch are respectively connected to the two input terminals of the first two-position three-way valve. A second two-position three-way valve includes one input terminal and two output terminals. The input terminal of the second two-position three-way valve is connected to the output terminal of the first two-position three-way valve. The two output terminals of the second two-position three-way valve are respectively connected to a cleaning module and a measurement module. The capillary flow measurement device of this application switches between liquid and gas paths through the first two-position three-way valve and switches between the measurement module and the cleaning module through the second two-position three-way valve, integrating rinsing, drying, and flow measurement functions into the same device. This not only improves the accuracy of flow measurement but also reduces measurement costs.

Description

Technical Field

[0001] This application belongs to the field of capillary flow measurement technology, and particularly relates to a capillary flow measurement device. Background Technology

[0002] In refrigeration equipment such as refrigerators and freezers, the capillary tube assembly is a key throttling component that regulates the flow and pressure of the refrigerant, and its flow rate directly affects the cooling effect of the equipment.

[0003] In the prior art, the flow rate of capillary modules is usually measured directly using a volumetric flow meter. The volumetric flow meter calculates the output flow rate of the capillary module by measuring the volume of fluid flowing through the cross-section of the capillary module per unit time.

[0004] However, after a period of use, many impurities usually adhere to the inner wall of the capillary assembly, which reduces the cross-sectional area of ​​the capillary assembly, making it difficult for the volumetric flow meter to accurately detect the flow rate of the capillary assembly. Furthermore, cleaning the capillary assembly not only requires rinsing it with a cleaning device, but also requires an additional drying device to dry it, resulting in a large number of devices required to measure the flow rate of the capillary assembly and a high measurement cost. Utility Model Content

[0005] To address the shortcomings of related technologies, this application provides a capillary flow measurement device that integrates rinsing, drying, and flow measurement functions into a single device. A first two-position three-way valve switches between liquid and gas paths, and a second two-position three-way valve switches between the measurement module and the cleaning module. This allows the capillary assembly to be rinsed and dried in the cleaning module before being measured by the measurement module, which not only improves the accuracy of flow measurement but also reduces measurement costs.

[0006] This application provides a capillary flow measurement device, comprising: An inert gas pipeline has an inert gas source connected at one end and a first branch and a second branch at the other end for transmitting inert gas, respectively. A liquid storage module is connected to the first branch, and the liquid storage module contains cleaning liquid. The first two-position three-way valve includes two input terminals and one output terminal. The liquid storage module and the second branch are respectively connected to the two input terminals of the first two-position three-way valve to input the inert gas and the cleaning liquid into the first two-position three-way valve respectively. The second two-position three-way valve includes one input terminal and two output terminals, and the input terminal of the second two-position three-way valve is connected to the output terminal of the first two-position three-way valve. The measurement module is connected to one of the output terminals of the second two-position three-way valve to measure the flow rate of the capillary group; A cleaning module is connected to the other output of the second two-position three-way valve for cleaning or drying the capillary assembly; The control module is electrically connected to the first two-position three-way valve, the second two-position three-way valve, the measurement module, and the cleaning module.

[0007] In some embodiments, the capillary flow measurement device further includes: A recycling module is connected to the cleaning module and electrically connected to the control module. The recycling module is used to recycle and process the waste liquid discharged by the cleaning module and input the processed waste liquid into the storage module.

[0008] In some embodiments, the recycling module includes: The liquid storage tank is connected to the cleaning module; A first filter is located between the liquid storage tank and the cleaning module and is connected to both of them respectively; A magnetic pump is connected at one end to the liquid storage tank and at the other end to the liquid storage module. The magnetic pump is electrically connected to the control module. A first solenoid valve is located between the magnetic pump and the liquid storage module in the connecting pipeline, and the first solenoid valve is electrically connected to the control module.

[0009] In some embodiments, the measurement module includes: A measuring unit is connected to the output terminal of the second two-position three-way valve. The measuring unit is used to load the capillary assembly so that the capillary assembly is connected to the output terminal of the second two-position three-way valve. The flow meter is connected to the output terminal of the same second two-position three-way valve as the measuring unit, and the flow meter and the measuring unit are connected in series or in parallel. The second solenoid valve is located between the measuring unit and the connecting pipeline of the second two-position three-way valve, and the second solenoid valve is electrically connected to the control module; The first valve is located between the measuring unit and the second solenoid valve in the connecting pipeline.

[0010] In some embodiments, the cleaning module includes: A cleaning unit is connected to the output terminal of the second two-position three-way valve. The cleaning unit is used to load the capillary assembly so that the capillary assembly is connected to the output terminal of the second two-position three-way valve. The third solenoid valve is located between the cleaning unit and the connecting pipeline of the second two-position three-way valve, and the third solenoid valve is electrically connected to the control module; The second valve is located between the cleaning unit and the third solenoid valve in the connecting pipeline.

[0011] In some embodiments, the liquid storage module includes: A liquid storage tank is used to store the cleaning liquid, and the liquid storage tank is connected to the first branch and the input terminal of the first two-position three-way valve respectively; A fourth solenoid valve is located in the first branch and between the inert gas source and the liquid storage tank. The fourth solenoid valve is electrically connected to the control module.

[0012] In some embodiments, the liquid storage module further includes: A first pressure regulating valve is provided in the first branch and located between the inert gas source and the liquid storage tank. The first pressure regulating valve is electrically connected to the control module, and a first pressure gauge is provided on the first pressure regulating valve. An exhaust valve is located in the first branch and between the fourth solenoid valve and the liquid storage tank.

[0013] In some embodiments, the capillary flow measurement device further includes: The fifth solenoid valve is located in the second branch and between the inert gas source and the first two-position three-way valve. The fifth solenoid valve is electrically connected to the control module. The second pressure regulating valve is located in the second branch and between the inert gas source and the first two-position three-way valve. The second pressure regulating valve is electrically connected to the control module and is equipped with a second pressure gauge.

[0014] In some embodiments, the capillary flow measurement device further includes: A high-pressure pressure reducer is located between the inert gas source and the inert gas pipeline and is connected to both respectively; The third pressure gauge is located between the high-pressure pressure reducer and the inert gas pipeline and is connected to both.

[0015] In some embodiments, the capillary flow measurement device further includes: The second filter is located between the high-pressure regulator and the inert gas pipeline and is connected to both respectively.

[0016] In summary, the capillary flow measurement device of this application integrates rinsing, drying, and flow measurement functions into a single device. A first two-position three-way valve switches between liquid and gas paths, and a second two-position three-way valve switches between the measurement module and the cleaning module. This allows the capillary assembly to be rinsed and dried in the cleaning module before being measured by the measurement module, improving the accuracy of flow measurement and reducing costs. Furthermore, the inclusion of a recycling module enables centralized treatment and recycling of cleaning wastewater, significantly reducing the cost of cleaning liquid consumption and enhancing the environmental friendliness and economic efficiency of the measurement process.

[0017] Other features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0018] 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 This is a diagram of the pipeline structure of the capillary flow measurement device of this application.

[0019] In the picture: 1. High-pressure regulator; 2. Second filter; 3. Third pressure gauge; 4. First pressure regulating valve; 5. First pressure gauge; 6. Fourth solenoid valve; 7. Exhaust valve; 8. Liquid storage tank; 9. First two-position three-way valve; 10. Second pressure regulating valve; 11. Second pressure gauge; 12. Fifth solenoid valve; 13. Second two-position three-way valve; 14. Second solenoid valve; 15. First manual valve; 16. Flow meter; 17. Measuring unit; 18. Third solenoid valve; 19. Second manual valve; 20. Cleaning unit; 21. First filter; 22. Liquid storage tank; 23. Magnetic pump; 24. First solenoid valve. Detailed Implementation

[0020] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0021] In the description of this application, it should be understood that the terms "center", "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 application.

[0022] The terms "first," "second," and "third" 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. Therefore, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature.

[0023] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific Implementation Example 1 Reference Appendix Figure 1 As shown, this application provides a capillary flow measurement device, including an inert gas pipeline, a liquid storage module, a first two-position three-way valve 9, a second two-position three-way valve 13, a measurement module, a cleaning module, and a control module.

[0025] The system includes an inert gas pipeline with one end connected to an inert gas source and the other end having a first branch and a second branch for transmitting inert gas. A liquid storage module is connected to the first branch and contains cleaning liquid. A first two-position three-way valve 9 has two inputs and one output. The liquid storage module and the second branch are connected to the two inputs of the first two-position three-way valve 9 to input inert gas and cleaning liquid to the first two-position three-way valve 9, respectively. A second two-position three-way valve 13 has one input and two outputs. The input of the second two-position three-way valve 13 is connected to the output of the first two-position three-way valve 9. A measurement module is connected to one output of the second two-position three-way valve 13 to measure the flow rate of the capillary assembly. A cleaning module is connected to the other output of the second two-position three-way valve 13 to clean or dry the capillary assembly. A control module is electrically connected to the first two-position three-way valve 9, the second two-position three-way valve 13, the measurement module, and the cleaning module.

[0026] Specifically, the inert gas pipeline is connected to an inert gas source, which stores inert gas at high pressure. The inert gas includes, but is not limited to, nitrogen, argon, and helium.

[0027] The inert gas pipeline further includes a first branch and a second branch. The first two-position three-way valve 9 includes two input terminals and one output terminal. The inert gas source supplies clean liquid or inert gas to the two input terminals of the first two-position three-way valve 9 through the first branch and the second branch, respectively.

[0028] The liquid storage module is connected to the first branch and to the input terminal of the first two-position three-way valve 9. The liquid storage module contains cleaning liquid, which includes anhydrous ethanol.

[0029] When the inert gas is input into the liquid storage module through the first branch, the cleaning liquid in the liquid storage module is pressed towards the first two-position three-way valve 9, thereby providing cleaning liquid input to the first two-position three-way valve 9.

[0030] The other input terminal of the first two-position three-way valve 9 is also connected to the second branch, through which the inert gas source directly supplies inert gas to the first two-position three-way valve 9.

[0031] The output of the first two-position three-way valve 9 is connected to the input of the second two-position three-way valve 13. The first two-position three-way valve 9 is used to connect its output to either input, that is, the first two-position three-way valve 9 can selectively deliver cleaning liquid or inert gas to the input of the second two-position three-way valve 13.

[0032] The second two-position three-way valve 13 includes one input terminal and two output terminals. The input terminal of the second two-position three-way valve 13 is connected to the output terminal of the first two-position three-way valve 9, and the two output terminals of the second two-position three-way valve 13 are respectively connected to the measurement module and the cleaning module.

[0033] The second two-position three-way valve 13 is used to connect its input end to either output end. That is, the second two-position three-way valve 13 can be used to select the output of cleaning liquid or inert gas to the measurement module for measuring the flow rate of the capillary assembly; or, the second two-position three-way valve 13 can be used to select the output of cleaning liquid or inert gas to the cleaning module for cleaning and drying the capillary assembly.

[0034] The control module is electrically connected to the first two-position three-way valve 9, the second two-position three-way valve 13, the measurement module, and the cleaning module.

[0035] The control module integrates hardware and software electronic control systems. The hardware includes a microprocessor CPU, memory, input interface, and output interface, while the software includes control programs and algorithms. The control module is used to receive instructions, execute preset logic programs, drive the actions of each execution module, and monitor the entire process, thereby achieving fully automated or semi-automated operation.

[0036] When the capillary flow measurement device of this application is used to clean the capillary assembly, the control module controls the first two-position three-way valve 9 to connect to the second branch or the liquid storage module, and controls the second two-position three-way valve 13 to connect to the cleaning module, so that the cleaning liquid in the liquid storage module enters the cleaning module for rinsing the capillary assembly, or allows the inert gas to enter the cleaning module for drying the capillary assembly.

[0037] When the capillary flow measurement device of this application is used to measure the flow rate of the capillary group, the control module controls the first two-position three-way valve 9 to connect to the liquid storage module, and controls the second two-position three-way valve 13 to connect to the measurement module, so that the clean liquid in the liquid storage module enters the measurement module for capillary flow measurement.

[0038] By setting up a dual-branch inert gas path, a first two-position three-way valve 9, and a second two-position three-way valve 13, efficient measurement and cleaning / drying functions are integrated, which not only improves the accuracy of flow measurement but also reduces measurement costs. At the same time, the unified control module's control capability enables a high degree of automation and fast response speed in flow measurement and cleaning processes.

[0039] Reference Appendix Figure 1 As shown, in some embodiments, the recycling module is connected to the cleaning module and electrically connected to the control module. The recycling module is used to recycle and process the waste liquid discharged by the cleaning module and input the processed waste liquid into the storage module.

[0040] Specifically, the recycling module is located between the cleaning module and the liquid storage module. It is used to collect, filter and process the waste liquid generated during the capillary cleaning process and return it to the liquid storage module to achieve the recycling of the cleaning liquid.

[0041] The recovery module includes at least a filtration device and a transfer container. The filtration device includes, but is not limited to, activated carbon filters, microporous membrane filters, or centrifugal separation devices to meet the filtration requirements of different cleaning liquids.

[0042] After being processed by the filtration device, the liquid is temporarily stored in a transfer container and then sent to the storage module after cleaning to avoid excessive backflow causing overpressure in the storage tank 8.

[0043] By incorporating a recycling module, centralized treatment and recycling of cleaning wastewater are achieved, significantly reducing the consumption cost of cleaning fluids and improving the environmental friendliness and economy of the measurement process. Furthermore, the automated wastewater treatment process avoids the risk of leakage and pollution from manual dumping, enhancing the safety and cleanliness of the experimental environment. The control module automates the entire recycling process, improving operational convenience and system maintainability.

[0044] Reference Appendix Figure 1 As shown, in some embodiments, the recycling module includes a storage tank 22, a first filter 21, a magnetic pump 23, and a first solenoid valve 24; the storage tank 22 is connected to the cleaning module; the first filter 21 is disposed between the storage tank 22 and the cleaning module and is connected to both respectively; one end of the magnetic pump 23 is connected to the storage tank 22, and the other end is connected to the storage module, and the magnetic pump 23 is electrically connected to the control module; the first solenoid valve 24 is disposed between the magnetic pump 23 and the connecting pipeline of the storage module, and the first solenoid valve 24 is electrically connected to the control module.

[0045] Specifically, the storage tank 22 serves as a transfer container for the recycling module, used to temporarily store the waste cleaning fluid discharged from the cleaning module.

[0046] The first filter 21 includes a filter housing and a removable and replaceable cartridge filter. The filter housing is made of metal or engineering plastic and has inlet and outlet connectors. It is connected in series on the pipeline from the cleaning module to the liquid storage tank 22. The filter material includes, but is not limited to, polypropylene melt-blown filter cartridges and stainless steel sintered filter screens.

[0047] The first filter 21 filters the waste liquid flowing from the cleaning module into the storage tank 22, removing physical impurities such as solid particles, fibers, and metal fragments. This prevents impurities from entering the storage tank 22 and being transported to the storage module by the magnetic pump 23 in subsequent circulation, thus avoiding clogging of the first two-position three-way valve 9 when using the cleaning liquid in the storage module.

[0048] The magnetic pump 23 is a corrosion-resistant magnetically driven centrifugal pump. The magnetic pump 23 is electrically connected to the control module. The control module controls the start and stop of the magnetic pump 23 through a relay or contactor. It is used to provide power for the waste liquid in the liquid storage tank 22 and pump the waste liquid from the liquid storage tank 22 back to the liquid storage module for easy recycling.

[0049] The first solenoid valve 24 is electrically connected to the control module and is used to precisely control the connection or closure of the liquid passage between the magnetic pump 23 and the liquid storage module.

[0050] When the magnetic pump 23 stops working, the first solenoid valve 24 immediately closes, which can prevent the liquid in the liquid storage module from flowing back into the liquid storage tank 22, and ensure the pressure independence and stability of each part of the entire device.

[0051] The waste liquid discharged from the cleaning module is fed into the storage tank 22 after most of the solid impurities are removed by the first filter 21. When the cleaning process of the capillary group is completed or the liquid level in the storage tank 22 reaches the set height, the control module starts the recycling process according to the preset program.

[0052] The control module first sends an opening signal to the first solenoid valve 24 to open it and connect the magnetic pump 23 to the liquid passage of the storage module. Then, the control module sends an opening signal to the magnetic pump 23, which draws the waste liquid that has undergone preliminary sedimentation from the storage tank 22. The pumped waste liquid flows through the opened first solenoid valve 24 and is finally transported back to the storage tank 8 of the storage module to complete the recycling.

[0053] When the recycling continues for a period of time or when the liquid level sensor in the storage tank 22 detects a low liquid level, the control module first sends a signal to stop the magnetic pump 23, and then closes the first solenoid valve 24.

[0054] The first filter 21, the liquid storage tank 22, the magnetic pump 23 and the first solenoid valve 24 realize a closed loop for the entire process of waste liquid filtration, storage, recycling and transportation, which improves the cleanliness of the recycled liquid. With the help of the control module, the whole process is fully automated and can be used in high-frequency experimental operation environments.

[0055] Reference Appendix Figure 1 As shown, in some embodiments, the measurement module includes a measurement unit 17, a flow meter 16, a second solenoid valve 14, and a first manual valve 15. The measurement unit 17 is connected to the output terminal of the second two-position three-way valve 13 and is used to load a capillary assembly so that the capillary assembly is connected to the output terminal of the second two-position three-way valve 13. The flow meter 16 and the measurement unit 17 are connected to the same output terminal of the second two-position three-way valve 13, and the flow meter 16 and the measurement unit 17 are connected in series or in parallel. The second solenoid valve 14 is located between the measurement unit 17 and the connecting pipeline of the second two-position three-way valve 13 and is electrically connected to the control module. The first manual valve 15 is located between the measurement unit 17 and the connecting pipeline of the second solenoid valve 14.

[0056] Specifically, the capillary flow measurement device includes a housing, a measurement unit 17 mounted on the housing, and a standardized, reliable interface for quick installation and fixation of the capillary assembly to be measured.

[0057] The measuring unit 17 is detachably connected to the capillary assembly via a quick-connect nozzle. The measuring unit 17 includes, but is not limited to, clamp-type, quick-connect, and slot-type structures to adapt to different types of capillary assemblies.

[0058] The flow meter 16 is located between the measuring unit 17 and the second two-position three-way valve 13. The flow meter 16 is connected in series or in parallel with the measuring unit 17 to accurately measure the flow rate of the fluid flowing through the capillary assembly and itself, and transmits the flow data to the control module in real time. The flow data measured by the flow meter 16 is used to determine whether the capillary assembly is unobstructed and whether the flow rate is within the qualified range.

[0059] The flow meter 16 includes, but is not limited to, a turbine flow meter 16 with digital display function, a thermal flow meter 16, a differential pressure flow meter 16, and a volumetric flow meter 16.

[0060] The second solenoid valve 14 is located between the measuring unit 17 and the connecting pipeline of the second two-position three-way valve 13 and is electrically connected to the control module. The second solenoid valve 14 is a proportional solenoid valve or servo valve whose opening degree can be precisely adjusted by the control module. By adjusting the opening degree of the second solenoid valve 14, the flow rate of liquid from the second two-position three-way valve 13 to the measuring unit 17 can be precisely controlled, thereby establishing and maintaining a stable hydraulic pressure at the inlet end of the measuring unit 17 and the capillary group.

[0061] In actual operation, the control module dynamically adjusts the opening of the second solenoid valve 14 according to the preset pressure program to cope with the pressure changes caused by different capillary patency, so as to achieve constant pressure or supply liquid to the measuring unit 17 according to a specific pressure curve.

[0062] The first hand valve 15 is located between the measuring unit 17 and the second solenoid valve 14. The first hand valve 15 is a precision needle valve. The operator can manually adjust the opening of the first hand valve 15 according to the capillary specifications being measured and the required pressure range, and set an approximate upper limit of working pressure or flow range.

[0063] The first valve 15 is pre-adjusted to a fixed and suitable opening degree, which provides an optimal working range for the second solenoid valve 14 when it performs dynamic and automatic precision pressure regulation, making its regulation more sensitive and effective.

[0064] In addition, the first hand valve 15 also serves as a power-free safety device, enabling operators to ensure absolute fluid cut-off and operator safety by manually closing the first hand valve 15 when the capillary assembly on the measuring unit 17 needs to be replaced or when the second solenoid valve 14 malfunctions.

[0065] By setting the second solenoid valve 14 and the first manual valve 15, dual protection of automatic control and manual emergency operation is achieved, improving the safety and flexibility of system operation; by setting the flow meter 16 and the capillary group to be connected in series or parallel, a wider range of measurement adaptation schemes are provided, improving measurement accuracy.

[0066] Reference Appendix Figure 1 As shown, in some embodiments, the cleaning module includes a cleaning unit 20, a third solenoid valve 18, and a second manual valve 19. The cleaning unit 20 is connected to the output terminal of the second two-position three-way valve 13. The cleaning unit 20 is used to load a capillary assembly so that the capillary assembly is connected to the output terminal of the second two-position three-way valve 13. The third solenoid valve 18 is located between the cleaning unit 20 and the connecting pipeline of the second two-position three-way valve 13, and the third solenoid valve 18 is electrically connected to the control module. The second manual valve 19 is located between the cleaning unit 20 and the connecting pipeline of the third solenoid valve 18.

[0067] Specifically, the cleaning unit 20 is mounted on the housing and provides a standardized, reliable interface for quick installation and fixation of the capillary assembly to be measured for cleaning.

[0068] The cleaning unit 20 includes a built-in spray head, a surrounding air-liquid interface, or a multi-channel structure to improve cleaning coverage and uniformity.

[0069] The third solenoid valve 18 is located between the cleaning unit 20 and the second two-position three-way valve 13 and is electrically connected to the control module. The third solenoid valve 18 is a proportional solenoid valve or servo valve whose opening degree can be precisely adjusted by the control module. By adjusting the opening degree of the third solenoid valve 18, the flow rate of liquid from the second two-position three-way valve 13 to the cleaning unit 20 can be precisely controlled, thereby establishing and maintaining a stable hydraulic pressure at the inlet end of the cleaning unit 20 and the capillary assembly.

[0070] In actual operation, the control module dynamically adjusts the opening of the third solenoid valve 18 according to the preset pressure program to cope with the pressure changes caused by different capillary patency, so as to achieve constant pressure or supply liquid to the cleaning unit 20 according to a specific pressure curve.

[0071] The second hand valve 19 is located between the cleaning unit 20 and the third solenoid valve 18. The second hand valve 19 is a precision needle valve. The operator can manually adjust the opening of the second hand valve 19 according to the capillary specifications and the pressure range required for cleaning, and set an approximate upper limit of working pressure or flow range to avoid damaging the capillary and effectively rinse away stains.

[0072] The second valve 19 is pre-adjusted to a fixed and suitable opening degree, which can provide an optimal working range for the third solenoid valve 18 when it performs dynamic and automatic precision pressure regulation, making its regulation more sensitive and effective.

[0073] In addition, the second hand valve 19 also serves as a power-free safety device, enabling operators to ensure absolute fluid cut-off and operator safety by manually closing the second hand valve 19 when the capillary assembly on the cleaning unit 20 needs to be replaced or when the third solenoid valve 18 malfunctions.

[0074] When a rinsing operation is required, the control module controls the first two-position three-way valve 9 to connect to the liquid storage module, and at the same time controls the second two-position three-way valve 13 to connect to the cleaning unit 20. After the third solenoid valve 18 is opened, the cleaning liquid flows into the cleaning unit 20 and covers the surface of the capillary assembly to achieve the rinsing function. The waste liquid after rinsing is discharged to the recovery module.

[0075] After rinsing is completed, the control module controls the first two-position three-way valve 9 to connect to the second branch to switch to inert gas input, and at the same time controls the second two-position three-way valve 13 to connect to the cleaning unit 20. After the third solenoid valve 18 is opened, inert gas flows into the cleaning unit 20 to dry the capillary assembly.

[0076] When performing rinsing and drying operations on the same capillary assembly using the cleaning module, there is no need to disassemble the capillary assembly, avoiding human damage and positioning errors, and saving disassembly and installation steps. It is suitable for capillary assembly cleaning scenarios with multiple batches and high frequency.

[0077] Reference Appendix Figure 1 As shown, in some embodiments, the liquid storage module includes a liquid storage tank 8 and a fourth solenoid valve 6. The liquid storage tank 8 is used to store cleaning liquid. The liquid storage tank 8 is connected to the first branch and the input terminal of the first two-position three-way valve 9. The fourth solenoid valve 6 is located in the first branch and between the inert gas source and the liquid storage tank 8. The fourth solenoid valve 6 is electrically connected to the control module.

[0078] Specifically, the core component of the liquid storage module is the liquid storage tank 8, which is used to store the cleaning liquid to be injected into the cleaning module. The liquid storage tank 8 is equipped with a level gauge, and the manufacturing materials of the liquid storage tank 8 include, but are not limited to, polytetrafluoroethylene, stainless steel or glass.

[0079] The fourth solenoid valve 6 is electrically connected to the control module to realize automatic control of the connection and disconnection between the inert gas source and the liquid storage tank 8, so as to prevent the clean liquid from flowing back to the inert gas source or flowing uncontrolled, and improve the stability and responsiveness of the system operation.

[0080] After the control module opens the fourth solenoid valve 6, the high-pressure inert gas in the first branch enters the liquid storage tank 8, applying a certain pressure to the tank. This pressure then pushes the cleaning liquid in the tank 8 through the pipeline into the first two-position three-way valve 9. The above-mentioned cleaning liquid supply process can be programmed into the control logic, and precise scheduling can be achieved through the control module.

[0081] Reference Appendix Figure 1 As shown, in some embodiments, the liquid storage module further includes a first pressure regulating valve 4 and an exhaust valve 7. The first pressure regulating valve 4 is located in the first branch and between the inert gas source and the liquid storage tank 8. The first pressure regulating valve 4 is electrically connected to the control module and is equipped with a first pressure gauge 5. The exhaust valve 7 is located in the first branch and between the fourth solenoid valve 6 and the liquid storage tank 8.

[0082] Specifically, during the process of high-pressure inert gas entering the storage tank 8 through the first branch, it first passes through the first pressure regulating valve 4. The first pressure regulating valve 4 is used to stabilize the high-pressure inert gas to a suitable working pressure. After pressure regulation, the inert gas enters the storage tank 8 through the fourth solenoid valve 6, pushing the cleaning liquid to be output, so as to ensure that the pressure is stable and controllable during the process of the cleaning liquid being input into the first two-position three-way valve 9.

[0083] The first pressure gauge 5 on the first pressure regulating valve 4 displays the current output inert gas pressure in real time, which facilitates monitoring and adjustment of the output pressure.

[0084] The first pressure regulating valve 4, together with the first pressure gauge 5, forms a closed-loop monitoring mechanism to ensure that the pressure is always within the set range, thus preventing damage to the storage tank 8 or spraying of cleaning liquid due to overpressure.

[0085] When the internal gas pressure of the liquid storage tank 8 is abnormal or when air needs to be vented, the excess pressure is released through the exhaust valve 7 located in the first branch and between the fourth solenoid valve 6 and the liquid storage tank 8, ensuring that the pressure inside the liquid storage tank 8 is stable and controllable, thereby avoiding affecting the delivery of clean liquid.

[0086] The vent valve 7 is designed to ensure rapid venting during maintenance, fluid replacement, or abnormal conditions, thereby improving the safety level and ease of operation and maintenance of the fluid supply system.

[0087] The first pressure regulating valve 4 is a digital electronic pressure regulating valve, which sets and feeds back the output pressure through the control module to achieve automatic adjustment; the first pressure gauge 5 includes a digital LCD display pressure gauge or a remote transmission type pressure gauge; the exhaust valve 7 includes a manual knob type, an automatic pressure relief valve, or a safety valve with check function.

[0088] By setting the first pressure regulating valve 4 and the exhaust valve 7, precise control of the inert gas pressure in the liquid storage module and safe release of abnormal gas pressure are achieved, significantly improving the safety and stability of the liquid supply system.

[0089] Reference Appendix Figure 1 As shown, in some embodiments, the fifth solenoid valve 12 is located in the second branch and between the inert gas source and the first two-position three-way valve 9, and the fifth solenoid valve 12 is electrically connected to the control module; the second pressure regulating valve 10 is located in the second branch and between the inert gas source and the first two-position three-way valve 9, the second pressure regulating valve 10 is electrically connected to the control module, and the second pressure regulating valve 10 is provided with a second pressure gauge 11.

[0090] Specifically, a fifth solenoid valve 12 and a second pressure regulating valve 10 are installed in the second branch to achieve automatic control of the inert gas flow and stable pressure output in the second branch.

[0091] Before the high-pressure inert gas output from the inert gas source enters the first two-position three-way valve 9 through the second branch, it first passes through the second pressure regulating valve 10. The second pressure regulating valve 10 adjusts the high-pressure gas to a stable gas pressure suitable for system operation, ensuring the accuracy and safety of capillary flow measurement or cleaning operations.

[0092] The second pressure gauge 11 on the second pressure regulating valve 10 is used to monitor and display the output air pressure value in real time for operators to refer to or to provide feedback to the control module for automatic adjustment.

[0093] The fifth solenoid valve 12, as an electronically controlled switch, is used to switch the inert gas on and off according to the logic instructions of the control module, so as to open when the drying process is performed and close when not in operation, thus avoiding ineffective inert gas consumption and accidental gas injection.

[0094] The second pressure regulating valve 10 is a digital electronic pressure regulating valve, which sets and feeds back the output pressure through the control module to achieve automatic adjustment; the second pressure gauge 11 includes a digital LCD display pressure gauge or a remote transmission type pressure gauge; the fifth solenoid valve 12 includes a quick-opening and quick-closing solenoid valve, an electric ball valve, or a proportional valve with flow regulation function to adapt to different control strategies.

[0095] By setting the fifth solenoid valve 12 and the second pressure regulating valve 10, the control capability and operational safety of the inert gas supply system are further improved. The second pressure regulating valve 10 ensures the stability of the gas pressure in the system and avoids interference from airflow fluctuations on flow measurement or cleaning effect. The second pressure gauge 11 provides real-time data support, which facilitates fault diagnosis and debugging by operators. The fifth solenoid valve 12 works with the control module to automate the management of the inert gas flow in the second branch.

[0096] Reference Appendix Figure 1 As shown, in some embodiments, the high-pressure pressure reducer 1 is located between the inert gas source and the inert gas pipeline and is connected to both respectively; the third pressure gauge 3 is located between the high-pressure pressure reducer 1 and the inert gas pipeline and is connected to both respectively.

[0097] Specifically, a high-pressure pressure reducer 1 is added between the inert gas source and the inert gas pipeline to reduce the high-pressure gas output from the inert gas source to the initial pressure value within the safe operating range of the equipment. After the inert gas is reduced in pressure, it enters the inert gas pipeline and then flows to the first branch and the second branch respectively, serving as the first layer of pressure control and protection measures for the entire system.

[0098] The third pressure gauge 3 is installed between the high-pressure pressure reducer 1 and the inert gas pipeline. It displays the initial gas pressure after pressure reduction in real time, which helps to determine whether the pressure reducer is working properly and serves as a reference for subsequent pressure control. This effectively prevents the high pressure at the inert gas source end from directly acting on various control valves and system components, thus improving the safety and stability of the device operation.

[0099] By setting up the high-pressure pressure reducer 1, the initial pressure stabilization of the high-pressure inert gas is achieved, preventing high pressure from directly entering the system and causing pipeline rupture or valve damage, thus improving the overall system safety. The setting of the third pressure gauge 3 provides a real-time pressure monitoring function, which makes it easy for maintenance personnel to grasp the system inlet pressure status, helps to detect abnormalities such as pressure reducer blockage or leakage in advance, and improves fault diagnosis efficiency.

[0100] In some embodiments, the second filter 2 is disposed between the high-pressure regulator 1 and the inert gas pipeline and is connected to both respectively.

[0101] Specifically, the second filter 2 is installed between the high-pressure regulator 1 and the inert gas pipeline to further purify the inert gas after pressure reduction, remove any impurities such as particles, oil mist or moisture that may remain, and ensure the purity of the inert gas flowing into the first branch and the second branch.

[0102] After the inert gas is reduced in pressure by the high-pressure regulator 1, it first flows through the second filter 2. After purification, it enters the inert gas pipeline to ensure that the control valves, capillary assemblies and measurement and cleaning modules are not blocked or corroded by contaminants.

[0103] The second filter 2 includes a high-precision microporous filter element or a multi-stage composite material structure, and features easy replacement and the ability to monitor blockage, thereby improving maintenance efficiency.

[0104] By setting a second filter 2, the quality of the inert gas supply is significantly improved, avoiding impurities from causing blockage, wear, or performance deviation of precision valves, capillaries, and flow meters 16. This helps to improve the accuracy and repeatability of flow measurement in the capillary assembly and is suitable for measurement experiments with high requirements for gas cleanliness.

[0105] When the capillary flow measurement device of this application is used to clean the capillary assembly, after the operator installs the capillary assembly in the cleaning unit 20, the control module controls the fourth solenoid valve 6 and the fifth solenoid valve 12 to open, and the liquid storage tank 8 and the second branch respectively deliver cleaning liquid and inert gas to the first two-position three-way valve 9.

[0106] When rinsing the capillary assembly, the control module controls the first two-position three-way valve 9 to connect to the liquid storage tank 8, and at the same time controls the second two-position three-way valve 13 to connect to the cleaning unit 20. After the control module controls the third solenoid valve 18 to open, the cleaning liquid flows into the cleaning unit 20 and covers the surface of the capillary assembly to achieve the rinsing function. The waste liquid after rinsing is discharged to the recovery module.

[0107] When drying the capillary assembly, the control module controls the first two-position three-way valve 9 to select the second branch to switch to inert gas input, and at the same time controls the second two-position three-way valve 13 to select the cleaning unit 20. After the control module controls the third solenoid valve 18 to open, the inert gas flows into the cleaning unit 20 to perform the drying operation on the capillary assembly.

[0108] When the capillary flow measurement device of this application is used to measure the flow of the capillary group, the operator installs the capillary group after the measurement unit 17. The control module controls the first two-position three-way valve 9 to connect to the liquid storage tank 8, and at the same time controls the second two-position three-way valve 13 to connect to the measurement unit 17. After the control module controls the second solenoid valve 14 to open, the cleaning liquid flows into the flow meter 16 and the measurement unit 17. The flow rate measured by the flow meter 16 is the flow rate value of the capillary group.

[0109] When the waste liquid is recycled after measurement and cleaning, the control module controls the first solenoid valve 24 to open, so as to connect the magnetic pump 23 to the liquid passage of the storage module. Then the control module sends an opening signal to the magnetic pump 23, and the magnetic pump 23 draws the waste liquid that has undergone preliminary sedimentation from the storage tank 22. The pumped waste liquid flows through the opened first solenoid valve 24 and is finally transported back to the storage tank 8 to complete the recycling.

[0110] The capillary flow measurement device of this application integrates rinsing, drying, and flow measurement functions into a single device. A first two-position three-way valve 9 switches between liquid and gas paths, and a second two-position three-way valve 13 switches between the measurement module and the cleaning module. This allows the capillary assembly to be rinsed and dried in the cleaning module before being measured by the measurement module, improving the accuracy of flow measurement and reducing costs. A recycling module enables centralized treatment and recycling of cleaning wastewater, significantly reducing the consumption cost of cleaning liquid and improving the environmental friendliness and economy of the measurement process. Furthermore, the device incorporates a second solenoid valve 14 and... The first-hand valve 15 provides dual protection for automatic control and manual emergency operation, improving the safety and flexibility of system operation. By setting the flow meter 16 and capillary group combination to be in series or parallel, a wider range of measurement adaptation schemes are provided, improving measurement accuracy. When the cleaning module performs flushing and drying operations on the same capillary group, there is no need to disassemble the capillary group, avoiding human damage and positioning errors, and saving disassembly and installation steps. By setting the first pressure regulating valve 4 and the exhaust valve 7, precise control of the inert gas pressure in the liquid storage module and safe release of abnormal gas pressure are achieved, significantly improving the safety and stability of the liquid supply system operation.

[0111] Finally, it should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0112] The above embodiments are only used to illustrate the technical solutions of this application and not to limit them; although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this application or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solutions of this application, and all such modifications and substitutions should be covered within the scope of the technical solutions claimed in this application.

Claims

1. A capillary flow measurement device, characterized in that, include: An inert gas pipeline has an inert gas source connected at one end and a first branch and a second branch at the other end for transmitting inert gas, respectively. A liquid storage module is connected to the first branch, and the liquid storage module contains cleaning liquid. The first two-position three-way valve includes two input terminals and one output terminal. The liquid storage module and the second branch are respectively connected to the two input terminals of the first two-position three-way valve to input the inert gas and the cleaning liquid into the first two-position three-way valve respectively. The second two-position three-way valve includes one input terminal and two output terminals, and the input terminal of the second two-position three-way valve is connected to the output terminal of the first two-position three-way valve. The measurement module is connected to one of the output terminals of the second two-position three-way valve to measure the flow rate of the capillary group; A cleaning module is connected to the other output of the second two-position three-way valve for cleaning or drying the capillary assembly; The control module is electrically connected to the first two-position three-way valve, the second two-position three-way valve, the measurement module, and the cleaning module.

2. The capillary flow measurement device according to claim 1, characterized in that, Also includes: A recycling module is connected to the cleaning module and electrically connected to the control module. The recycling module is used to recycle and process the waste liquid discharged by the cleaning module and input the processed waste liquid into the storage module.

3. The capillary flow measurement device according to claim 2, characterized in that, The recycling module includes: The liquid storage tank is connected to the cleaning module; A first filter is located between the liquid storage tank and the cleaning module and is connected to both of them respectively; A magnetic pump is connected at one end to the liquid storage tank and at the other end to the liquid storage module. The magnetic pump is electrically connected to the control module. A first solenoid valve is located between the magnetic pump and the liquid storage module in the connecting pipeline, and the first solenoid valve is electrically connected to the control module.

4. The capillary flow measurement device according to claim 1, characterized in that, The measurement module includes: A measuring unit is connected to the output terminal of the second two-position three-way valve. The measuring unit is used to load the capillary assembly so that the capillary assembly is connected to the output terminal of the second two-position three-way valve. The flow meter is connected to the output terminal of the same second two-position three-way valve as the measuring unit, and the flow meter and the measuring unit are connected in series or in parallel. The second solenoid valve is located between the measuring unit and the connecting pipeline of the second two-position three-way valve, and the second solenoid valve is electrically connected to the control module; The first valve is located between the measuring unit and the second solenoid valve in the connecting pipeline.

5. The capillary flow measurement device according to claim 1, characterized in that, The cleaning module includes: A cleaning unit is connected to the output terminal of the second two-position three-way valve. The cleaning unit is used to load the capillary assembly so that the capillary assembly is connected to the output terminal of the second two-position three-way valve. The third solenoid valve is located between the cleaning unit and the connecting pipeline of the second two-position three-way valve, and the third solenoid valve is electrically connected to the control module; The second valve is located between the cleaning unit and the third solenoid valve in the connecting pipeline.

6. The capillary flow measurement device according to claim 1, characterized in that, The liquid storage module includes: A liquid storage tank is used to store the cleaning liquid, and the liquid storage tank is connected to the first branch and the input terminal of the first two-position three-way valve respectively; A fourth solenoid valve is located in the first branch and between the inert gas source and the liquid storage tank. The fourth solenoid valve is electrically connected to the control module.

7. The capillary flow measurement device according to claim 6, characterized in that, The liquid storage module also includes: A first pressure regulating valve is provided in the first branch and located between the inert gas source and the liquid storage tank. The first pressure regulating valve is electrically connected to the control module, and a first pressure gauge is provided on the first pressure regulating valve. An exhaust valve is located in the first branch and between the fourth solenoid valve and the liquid storage tank.

8. The capillary flow measurement device according to claim 1, characterized in that, Also includes: The fifth solenoid valve is located in the second branch and between the inert gas source and the first two-position three-way valve. The fifth solenoid valve is electrically connected to the control module. The second pressure regulating valve is located in the second branch and between the inert gas source and the first two-position three-way valve. The second pressure regulating valve is electrically connected to the control module and is equipped with a second pressure gauge.

9. The capillary flow measurement device according to any one of claims 1 to 8, characterized in that, Also includes: A high-pressure pressure reducer is located between the inert gas source and the inert gas pipeline and is connected to both respectively; The third pressure gauge is located between the high-pressure pressure reducer and the inert gas pipeline and is connected to both.

10. The capillary flow measurement device according to claim 9, characterized in that, Also includes: The second filter is located between the high-pressure regulator and the inert gas pipeline and is connected to both respectively.

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