Hydrogen-rich water preparation system and method capable of rapidly adjusting hydrogen concentration

Abstract

The invention discloses a hydrogen-rich water preparation system and method capable of rapidly adjusting hydrogen concentration, and belongs to the technical field of agricultural irrigation. The system comprises an electrolytic hydrogen production unit, a nano-bubble hydrogen melting device, an intelligent control unit, a concentration regulation and control module and an automatic water replenishing system. The core is that the hydrogen production amount is linearly adjusted through the concentration regulation and control module, and rapid and accurate control over the concentration of the hydrogen-rich water is achieved; meanwhile, through an automatic water replenishing system composed of a liquid level sensor and an automatic water replenishing valve, the mode of'first manual initialization, follow-up automatic operation and replenishment 'is achieved. The method is based on the system, and full-process automation from concentration setting, intelligent hydrogen production and hydrogen melting to automatic water replenishing monitoring is achieved; the system solves the problems that existing equipment is inflexible in concentration adjustment and high in manual operation and maintenance cost, and is particularly suitable for large-scale and precise modern agricultural irrigation.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of agricultural irrigation and water treatment, in particular to a hydrogen-rich water preparation system and method capable of quickly adjusting hydrogen concentration. BACKGROUND

[0002] Hydrogen, as a new type of agricultural growth regulator, has been proven to have a positive effect on crop growth, stress resistance and quality improvement. Hydrogen-rich water irrigation is one of the main ways to implement "hydrogen agriculture".

[0003] Currently, the traditional hydrogen-rich water preparation equipment has the following shortcomings: first, the hydrogen output concentration is often fixed, or the adjustment range is limited and the precision is not high, which cannot flexibly and quickly adjust the concentration according to the precise needs of different crops and different growth stages. Second, the operation automation degree of the equipment is low, and the pure water required for hydrogen production needs to be added frequently by manual operation, which not only increases the labor cost, but also due to the uncertainty of human operation, there is a risk of adding unqualified water sources such as tap water, which in turn damages the core electrolytic hydrogen production unit. In addition, the existing equipment also has room for improvement in terms of hydrogen dissolution efficiency, system stability and intelligent monitoring.

[0004] Therefore, there is an urgent need for a hydrogen-rich water preparation system that can quickly and accurately adjust the hydrogen concentration and has a high degree of automation operation capability. SUMMARY

[0005] The purpose of the present application is to overcome the shortcomings of the prior art and provide a hydrogen-rich water preparation system and method capable of quickly adjusting hydrogen concentration. The system aims to achieve linear and accurate regulation of hydrogen-rich water concentration, and through functions such as automatic water replenishment and water quality monitoring, it realizes intelligent operation from "first manual, then automatic", significantly reduces operation and maintenance costs, and ensures long-term stability of the equipment.

[0006] To achieve the above purpose, the present application adopts the following technical solutions: A hydrogen-rich water preparation system capable of quickly adjusting hydrogen concentration, characterized in that it comprises: An electrolytic hydrogen production unit for electrolyzing pure water to generate hydrogen; A nano-bubble hydrogen fusion device connected to the electrolytic hydrogen production unit for dissolving the hydrogen in the form of nano-bubbles in irrigation water; An intelligent control unit as the control core of the system; A concentration regulation module integrated in the intelligent control unit for receiving user-set concentration instructions and linearly adjusting the hydrogen output of the electrolytic hydrogen production unit to achieve rapid and accurate control of hydrogen-rich water concentration; The automatic water supplement system comprises a pure water tank, a liquid level sensor and an automatic water supplement valve; the pure water tank is used for storing pure water required for electrolytic hydrogen production; the liquid level sensor is used for monitoring the water level of the pure water tank; and the automatic water supplement valve is controlled by the intelligent control unit and used for automatically supplementing water from an external pure water source when the water level is too low.

[0007] The concentration regulating module is pre-provided with a plurality of hydrogen concentration levels corresponding to different growth requirements of crops, and a one-key switching and setting is performed by a man-machine interface integrated by the intelligent control unit.

[0008] Further comprising a water quality monitoring unit for monitoring the purity of the water source supplied to the electrolytic hydrogen production unit in real time; and the intelligent control unit is configured to automatically trigger an audible and light alarm and perform a protective shutdown when the water quality monitoring unit detects that the water quality exceeds the standard.

[0009] The automatic water supplement system is configured to follow a working mode of "first manual and then automatic": when the system is started for the first time, the pure water tank needs to be manually initialized and watered through a water inlet at the top of the equipment; and in the subsequent operation, when the liquid level sensor detects that the water level is lower than the set threshold, the intelligent control unit automatically opens the automatic water supplement valve for water supplement until the water level returns to the high water level and then the automatic water supplement valve is closed.

[0010] The system further comprises a gas-liquid mixing pump arranged between the electrolytic hydrogen production unit and the nano-bubble hydrogen melting device, which is used for pre-mixing hydrogen and water flow to improve the hydrogen melting efficiency of the subsequent nano-bubble.

[0011] The system further comprises a gas-liquid mixing pump arranged between the electrolytic hydrogen production unit and the nano-bubble hydrogen melting device, which is used for pre-mixing hydrogen and water flow to improve the hydrogen melting efficiency of the subsequent nano-bubble.

[0012] The intelligent control unit is further connected with a sensor group for monitoring the running state of the system, and the sensor group at least comprises a pressure sensor for monitoring the outlet water pressure of the nano-bubble hydrogen melting device, a pH meter for monitoring the hydrogen-rich water acidity and alkalinity, and a hydrogen flow meter for confirming the hydrogen supply.

[0013] A hydrogen-rich water preparation method, characterized in that it comprises the following steps: System initialization step: completing the first manual water filling in the pure water tank of the system; Concentration setting and starting step: setting the target hydrogen concentration by the intelligent control unit and starting the system; Intelligent hydrogen production and hydrogen melting step: the concentration regulating module linearly adjusts the hydrogen production amount of the electrolytic hydrogen production unit according to the set value, and the generated hydrogen and water flow are treated by the nano-bubble hydrogen melting device to generate stable and high-solubility hydrogen-rich water; Automatic operation step: the system automatically monitors the water level in the pure water tank during operation and automatically replenishes water, while monitoring water quality and water pressure key parameters in real time to ensure continuous and stable operation of the system.

[0014] In the automatic operation step, when the system detects that the water quality purity does not meet the standard, it automatically executes an alarm and stops; when it detects that the pure water tank liquid level is below the threshold, it automatically opens the water replenishment valve until the liquid level is restored.

[0015] In the automatic operation step, when the system detects that the water quality purity does not meet the standard, it automatically executes an alarm and stops; when it detects that the pure water tank liquid level is below the threshold, it automatically opens the water replenishment valve until the liquid level is restored.

[0016] Compared with the prior art, the present application provides a hydrogen-rich water preparation system and method that can quickly adjust the hydrogen concentration, with the following beneficial effects: The present application realizes rapid, accurate and programmable control of the hydrogen concentration of hydrogen-rich water through linear adjustment of the concentration control module, thereby meeting the needs of precision agriculture; on this basis, the system uses an innovative "first manual, then automatic" water replenishment mode, which not only greatly reduces the long-term operation labor cost and dependence on operators, but also realizes highly automated operation; at the same time, through real-time monitoring of water quality and automatic protection shutdown mechanism, damage to the core components of the equipment caused by unqualified water sources is effectively prevented, further prolonging the service life of the equipment and ensuring the safety and reliability of the system; in addition, the application of nanobubble technology ensures efficient dissolution and long-term stability of hydrogen, and the internal water circulation system effectively reduces pure water consumption, combined with the advantage of low overall power, which together embodies the green agricultural concept of high efficiency, energy saving and environmental protection. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 The present application is a schematic diagram of the overall process; DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application.

[0019] The electrolysis unit of the present system uses proton exchange membrane (PEM) electrolysis technology to produce high-purity hydrogen gas from pure water. The generated hydrogen gas is transported through a pipeline to a gas-liquid mixing pump and preliminarily mixed with irrigation water from the pure water tank.

[0020] The preliminarily mixed gas-water mixture then enters the nanobubble hydrogen dissolving device. The device produces nanoscale bubbles through vortex, pressure dissolution and other methods to efficiently and stably dissolve hydrogen gas in water, forming the hydrogen-rich water required by the present application.

[0021] The intelligent control unit is the brain of the entire system, and its core is an embedded industrial controller. The concentration control module, as its embedded software algorithm, receives user instructions from the touch screen (human-machine interaction interface). For example, the user can select "seedling growth promotion" or "flowering stress resistance" on the touch screen. The concentration control module will convert the gear into a corresponding current control signal and send it to the electrolytic hydrogen production unit to achieve linear stepless adjustment of hydrogen production.

[0022] The working process of the automatic water replenishment system is as follows: the liquid level sensor (such as a float switch or a capacitive sensor) installed on the pure water tank continuously sends the water level signal to the intelligent control unit. During the first commissioning, the technician fills the pure water tank with qualified water sources such as Yibao pure water through the water inlet on the top of the device. After that, when the liquid level drops to the low threshold (for example, 20% of the water tank capacity) during system operation, the intelligent control unit immediately sends an opening instruction to the automatic water replenishment valve (such as a solenoid valve) to take water from the externally connected bottled pure water or central pure water system; when the liquid level returns to the high threshold (for example, 95%), the automatic water replenishment valve is automatically closed.

[0023] The TDS sensor of the water quality monitoring unit is installed on the water outlet pipeline of the pure water tank to detect the purity of the water source in real time. Once the TDS value exceeds the set safety threshold (for example, 10 ppm), the intelligent control unit will immediately pop up a red alarm icon on the touch screen, drive the buzzer to sound, and cut off the power supply of the electrolytic hydrogen production unit to achieve protective shutdown.

[0024] In addition, the system monitors the water outlet pressure, hydrogen-rich water pH value, and hydrogen supply through pressure sensors, pH meters, and hydrogen flow meters. All data are displayed on the touch screen for users to fully understand the system status.

[0025] The implementation process of the method starts with system initialization. After the first water filling is completed, the user sets the concentration and starts the system. During the intelligent hydrogen production and hydrogen melting stages, the system works automatically according to the set concentration. During the entire automatic operation and maintenance process, liquid level monitoring and automatic water replenishment, water quality monitoring and protection are carried out synchronously, forming an intelligent closed loop. In addition, the water resource recycling step can be optionally enabled to reuse the purified backflow liquid.

[0026] The technical solutions of the present application will be described in detail below in conjunction with the drawings. In order to make the purpose, technical solutions and advantages of the present application more clear and explicit, the following will be described in detail through the specific operation process of the specific implementation example.

[0027] The implementation site of this embodiment is selected in the modern agricultural demonstration park in Tongxiang City, Zhejiang Province, and the implementation time is from March 2023 to March 2024. The park belongs to a typical subtropical monsoon climate with an average annual temperature of 16℃ and an annual precipitation of 1200mm. The soil is paddy soil with a pH value of 6.8, which has good representativeness.

[0028] First, a 1000 square meter multi-span greenhouse was selected as the test site. Before equipment installation, the construction team carried out the following steps for the foundation preparation: The first step is the construction of the equipment foundation. A 200mm thick concrete foundation was poured in the equipment room inside the greenhouse, and a drainage ditch was set up around the foundation. Considering the vibration problem during equipment operation, a 10mm thick rubber shock pad was installed between the concrete foundation and the equipment base.

[0029] The second step is the pre-laying of the pipe network. Food-grade stainless steel pipes with DN32 were used as the main pipes, and all pipe connections used double-clamp connections to ensure firm and reliable connections. During pipe laying, special attention was paid to maintaining a 0.5% drainage slope, and a drain valve was installed at the lowest point.

[0030] After completing the foundation construction, the specific installation of the system began. The installation process strictly followed the following order:

[0035] First, the main equipment was placed in position. The main equipment weighing 120 kg was placed smoothly on the foundation using a forklift, and the equipment position was adjusted using a level to ensure that the equipment was completely level. Then the pipe connections were made, including the water inlet pipe, water outlet pipe, water replenishment pipe and circulation pipe connections. Among them, the water inlet pipe is connected to the irrigation water source of the greenhouse, the water outlet pipe is connected to the main pipe of the drip irrigation system, and the water replenishment pipe is connected to the 500L pure water tank set up outdoors.

[0036] During the electrical connection stage, a separate distribution box was set up for the equipment, equipped with overload protection and leakage protection devices. A 4 square millimeter copper core cable was used to connect to the AC220V power supply, and an independent grounding wire was set up with a grounding resistance of less than 4Ω.

[0037] After installation, the system initialization operation began. This process requires special care, as the quality of the initialization directly affects the stability of the subsequent system operation.

[0038] First, the first water filling of the pure water tank was carried out. The water inlet on the top of the equipment was opened, and about 5 liters of Yibao pure water was slowly filled using a dedicated water filling tool. During the water filling process, the water level change was closely observed through the observation window, and when the water level reached the calibrated high liquid level line, the water filling was immediately stopped. This step, although simple, is crucial, as it not only establishes an initial pure water reserve for the system, but more importantly, provides a qualified starting water source for the electrolytic hydrogen production unit.

[0039] After the water injection, a detailed pre-energization inspection was carried out. The inspection included: confirming that all pipeline connections were firm and leak-free, using a multimeter to detect that the power voltage was stable at 225V, using a grounding resistance tester to confirm that the grounding protection was reliable and effective, and checking each valve one by one to ensure that it was in the correct open state.

[0035] After confirming that everything was normal, the system power was turned on. The system immediately began a self-checking program: the liquid level sensor first detected the water level in the pure water tank, showing that the water level was normal; then the water quality monitoring unit began to detect the purity of the water source, with the TDS value showing 5ppm, meeting the requirements; each sensor in turn was calibrated to zero; finally, the control unit initialized each actuator. The entire self-checking process lasted about 2 minutes, during which the touch screen displayed the self-checking progress in real time. After the self-checking was passed, the system entered a standby state, and the touch screen displayed a clear main operation interface.

[0036] During actual use, the operator can perform convenient operation through the human-machine interface of the intelligent control unit. The interface design is intuitive and friendly, providing four pre-set concentration modes: mode one is suitable for promoting growth in the seedling stage and is set to low concentration; mode two is suitable for growth enhancement in the growth stage and is set to medium concentration; mode three is suitable for quality improvement in the flowering and fruiting stage and is set to high concentration; and mode four is a self-defined concentration mode, allowing users to accurately set the target concentration within the range of 0-2000ppb.

[0037] Taking tomato planting as an example, mode one is selected during the seedling stage after transplanting; mode two is switched to during the rapid growth stage; and mode three is used for quality improvement when the buds start to bloom. Each time the concentration is switched, the concentration control module automatically calculates and stores the corresponding control parameters, ensuring the accuracy and stability of the concentration adjustment.

[0038] The start-up operation of the system is designed to be simple and standardized: first, rotate the power switch clockwise to the "ON" position, and hear a crisp "click" sound indicating that the power has been turned on; then press the device start-stop button, and the system starts running, at which time you can hear the sound of the water pump starting; then observe the outlet pressure gauge, and wait for the pressure to stabilize at about 2.2kg / cm²; finally, press the hydrogen production start-stop button, and the system officially starts hydrogen production. The whole process is gradual and ensures the safe start-up of the equipment.

[0039] After the system starts, the electrolytic hydrogen production unit begins to work. It is observed that the concentration control module adjusts the working current of the electrolytic cell in real time according to the set concentration value through the precise PID algorithm, achieving linear and accurate adjustment of hydrogen production. Professional instruments detect that the purity of the hydrogen produced by electrolysis reaches a high standard of more than 99.99%.

[0040] Hydrogen is delivered to the gas-liquid mixing pump through a dedicated pipeline, where it is pre-mixed with irrigation water from the pure water tank. The gas-liquid mixing pump uses advanced Venturi principles to create a negative pressure zone in the pump cavity, effectively breaking the gas into tiny bubbles, with a preliminary mixing efficiency of over 85%.

[0041] The pre-mixed gas-water mixture then enters the core nanobubble hydrogen fusion device. This device uses a unique vortex pressurization technology, with the entire hydrogen fusion process divided into four carefully designed steps: first, a strong negative pressure zone is created through high-speed rotation, dispersing hydrogen gas into micron-sized bubbles; then, the gas-water mixture is precisely pressurized in the pressurization chamber, significantly promoting hydrogen dissolution; next, a specially designed nanobubble generator uses shear force to further break the remaining bubbles to the nanometer level; finally, in the steady flow chamber, the guide plate stabilizes the bubble distribution, ensuring uniform and stable water concentration. The entire process takes place in a completely sealed environment, not only ensuring safety, but also achieving a high level of hydrogen dissolution efficiency of over 92%.

[0042] During system operation, the intelligent control unit monitors each operating parameter of the system in real time through multiple sensors. The water quality monitoring system continuously monitors the purity of the water source supplied to the electrolytic hydrogen production unit. When the TDS value exceeds the safety threshold of 10 ppm, the system will immediately activate the protection program: the red alarm icon on the touch screen begins to flash, the buzzer emits an intermittent alarm sound of 1 second on and 1 second off, and the electrolytic hydrogen production unit power is immediately cut off, and the alarm event and occurrence time are accurately recorded in the system.

[0043] The liquid level monitoring system constantly monitors the water level changes in the pure water tank. When the water level is below 20% of the total volume, the system will automatically execute the water replenishment program: the intelligent control unit sends an opening signal to the automatic water replenishment valve, and external pure water flows into the pure water tank. When the water level reaches 95% of the high liquid level, the water replenishment valve automatically closes. This system realizes a truly "first manual, subsequent automatic" intelligent operation and maintenance mode. During the entire test period, in addition to the initial manual water injection, the subsequent water replenishment is completely completed automatically by the system.

[0044] In addition, the system is also equipped with a complete operating parameter monitoring system: the pressure sensor monitors the outlet water pressure in real time to ensure that the pressure is stable within the set range; the pH meter continuously monitors the hydrogen-rich water pH to ensure that the water quality always meets the irrigation requirements; the hydrogen flow meter accurately monitors the hydrogen supply state to ensure that the hydrogen production process proceeds normally; the temperature sensor monitors the temperature of each key part of the system, effectively preventing overheating of the equipment.

[0045] As an alternative, we also designed an internal water recycling system to maximize water resource utilization. When there is hydrogen-rich water that is not consumed by crops in the irrigation system, the system will automatically start the recycling program: first, collect the unused hydrogen-rich water into the temporary storage tank through the backflow pipeline; then, four-stage purification treatment, the first stage uses quartz sand to remove suspended solids and impurities, the second stage uses activated carbon to adsorb organic matter and odors, the third stage uses a precision filter to filter out small particles, and the fourth stage uses ultraviolet disinfection to kill microorganisms; finally, the purified water is transported back to the pure water tank by the backflow pump and mixed with newly supplemented pure water for reuse. This recycling system increases water utilization by more than 40%, significantly reducing pure water consumption.

[0046] When it needs to be shut down, strictly follow the standard procedures: first, press the hydrogen production start-stop button to stop the hydrogen production process, wait for 2-3 minutes to allow the system to completely discharge the remaining hydrogen gas; then press the device start-stop button to stop the device operation; finally, rotate the power switch counterclockwise to the "OFF" position to cut off the power. Such a shutdown sequence ensures the safety of the device and personnel.

[0047] In terms of daily maintenance, a detailed maintenance plan is developed: check the connection of each pipeline every week, clean the pre-filter every month, calibrate the sensor using standard instruments every quarter, and replace the electrolytic tank purification material every half year. These standard maintenance measures ensure that the system remains in good operating condition throughout the entire test period.

[0048] After a year of practical application, the system has shown significant results. In the tomato planting test, after using hydrogen-rich water with a concentration of 800ppb for irrigation, the yield increased by 18.7%, the vitamin C content of the fruit increased by 23.4%, and the shelf life was extended by 5 days. In the strawberry planting area, using hydrogen-rich water with a concentration of 1200ppb for irrigation, the incidence of powdery mildew decreased by 65.3%, the sugar content increased by 1.2°, and the marketable fruit rate increased by 22.8%. In the leafy vegetable planting area, using hydrogen-rich water with a concentration of 600ppb for irrigation, the growth cycle was shortened by 4-6 days, the nitrate content was reduced by 35.7%, and the leaf thickness and color were significantly improved.

[0049] More importantly, the system is stable and reliable, with a high degree of automation, and only one person is needed for daily monitoring during the entire test period, greatly reducing labor costs. Compared with traditional equipment, water saving rate reaches 45%, and comprehensive energy consumption is reduced by 30%, showing significant economic and ecological benefits.

[0050] In order to realize the precise closed-loop control of the concentration, the system is additionally provided with a hydrogen-rich water concentration real-time monitoring unit. The unit adopts a sensor based on the principle of specific gas molecular absorption spectrum (such as TDLAS), and the detection probe thereof is directly installed on the main water outlet pipeline after the nano-bubble hydrogen fusion device, so as to realize the online, real-time and continuous measurement of the dissolved hydrogen concentration in the finally output hydrogen-rich water, and the measurement data (unit: ppb) are transmitted to the intelligent control unit in real time.

[0051] The concentration regulation module runs a high-precision PID control algorithm. The concentration value fed back by the real-time monitoring unit is taken as a process variable (PV), and compared with the target concentration value (SP) set by the user. Once the concentration deviates from the set value due to changes in water flow, temperature and the like, the PID algorithm will immediately calculate the correction amount, and dynamically adjust the hydrogen production rate by changing the current signal to the electrolytic hydrogen production unit.

[0052] Through this complete implementation case, it can be clearly seen that the present application not only solves the problem of inflexible concentration adjustment of traditional hydrogen-rich water preparation equipment, but also significantly reduces the labor cost through the intelligent operation and maintenance system, and provides a reliable hydrogen-rich water preparation solution for modern agriculture.

[0053] The above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application.

[0054] Finally, it should be pointed out that: the above only describes the preferred embodiments of the present application and is not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify or replace the technical solutions recorded in the foregoing embodiments, or equivalently replace some technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A hydrogen-rich water preparation system capable of quickly adjusting hydrogen concentration, characterized by, The system comprises: an electrolytic hydrogen production unit for electrolyzing pure water to produce hydrogen gas; a nano-bubble hydrogen dissolving device connected to the electrolytic hydrogen production unit for dissolving the hydrogen gas in irrigation water in the form of nano-bubbles; an intelligent control unit as the control core of the system; a concentration control module integrated in the intelligent control unit for receiving user-set concentration instructions and linearly adjusting the hydrogen output of the electrolytic hydrogen production unit to achieve rapid and accurate control of the concentration of hydrogen-rich water; an automatic water replenishment system comprising a pure water tank, a liquid level sensor and an automatic water replenishment valve; the pure water tank is used to store pure water required for electrolytic hydrogen production; the liquid level sensor is used to monitor the water level in the pure water tank; the automatic water replenishment valve is controlled by the intelligent control unit and used to automatically replenish water from an external pure water source when the water level is too low; a hydrogen-rich water concentration real-time monitoring unit arranged at the water outlet of the nano-bubble hydrogen dissolving device for online and real-time detection of the dissolved hydrogen concentration; The concentration control module is further configured to receive feedback signals from the real-time monitoring unit and form a closed-loop control circuit with the user-set target concentration to dynamically adjust the hydrogen production of the electrolytic hydrogen production unit to maintain the stability of the hydrogen-rich water concentration. 2.The hydrogen-rich water preparation system with quickly adjustable hydrogen concentration of claim 1, wherein The concentration control module is pre-set with multiple hydrogen concentration levels corresponding to the growth requirements of different crops, and the user can switch and set the levels through the human-computer interaction interface integrated in the intelligent control unit. 3.The hydrogen-rich water preparation system capable of quickly adjusting hydrogen concentration of claim 1, wherein It also includes a water quality monitoring unit for real-time monitoring of the purity of the water source supplied to the electrolytic hydrogen production unit; the intelligent control unit is configured to automatically trigger an audible and visual alarm and perform a protective shutdown when the water quality monitoring unit detects that the water quality exceeds the standard. 4.The hydrogen-rich water preparation system capable of quickly adjusting hydrogen concentration of claim 1, wherein The automatic water replenishment system is configured to follow the working mode of "first manual and then automatic": when the system is started for the first time, the pure water tank needs to be manually initialized and filled through the water inlet at the top of the device; in the subsequent operation, when the liquid level sensor detects that the water level is below the set threshold, the intelligent control unit automatically opens the automatic water replenishment valve for water replenishment until the water level returns to the high level and the valve is closed. 5.The hydrogen-rich water preparation system capable of quickly adjusting hydrogen concentration of claim 4, wherein The system also includes a gas-liquid mixing pump arranged between the electrolytic hydrogen production unit and the nano-bubble hydrogen dissolving device for pre-mixing hydrogen gas and water flow to improve the hydrogen dissolving efficiency of the subsequent nano-bubbles. 6.The hydrogen-rich water preparation system with quickly adjustable hydrogen concentration of claim 1, wherein, The system also includes a gas-liquid mixing pump arranged between the electrolytic hydrogen production unit and the nano-bubble hydrogen dissolving device for pre-mixing hydrogen gas and water flow to improve the hydrogen dissolving efficiency of the subsequent nano-bubbles. 7.The hydrogen-rich water preparation system capable of quickly adjusting hydrogen concentration of claim 3, wherein The intelligent control unit is also connected to a sensor group for monitoring the operating state of the system, which at least includes a pressure sensor for monitoring the outlet water pressure of the nano-bubble hydrogen dissolving device, a pH meter for monitoring the pH of the hydrogen-rich water, and a hydrogen flow meter for confirming the hydrogen supply.

8. A method for producing hydrogen-rich water, characterized by, The system comprises the following steps: system initialization step: manually filling the pure water tank of the system for the first time; concentration setting and starting step: setting the target hydrogen concentration through the intelligent control unit and starting the system; The intelligent hydrogen production and hydrogen melting steps: the concentration regulation module linearly adjusts the hydrogen production amount of the electrolytic hydrogen production unit according to the set value, the generated hydrogen and water flow through the nano-bubble hydrogen melting device to generate stable and high-solubility hydrogen-rich water; The real-time feedback and closed-loop stable control steps: the hydrogen-rich water concentration real-time monitoring unit online detects the concentration of the generated hydrogen-rich water, and feeds back the signal to the concentration regulation module in real time; the concentration regulation module compares the detected value with the target value, and dynamically adjusts the hydrogen production amount of the electrolytic hydrogen production unit to form a closed-loop control to resist external interference and maintain the long-term stability of the output concentration; The automatic operation and maintenance steps: the system automatically monitors the pure water tank liquid level and realizes automatic water replenishment during the operation process, and simultaneously monitors the water quality and water pressure key parameters to ensure the continuous and stable operation of the system.

9. The hydrogen-rich water production method according to claim 8, wherein In the automatic operation and maintenance steps, when the system monitors that the water quality purity does not meet the standard, the system automatically executes the alarm and stops; when the pure water tank liquid level is lower than the threshold value, the system automatically opens the water replenishment valve until the liquid level is restored.

10. The hydrogen-rich water production method according to claim 8, wherein In the automatic operation and maintenance steps, when the system monitors that the water quality purity does not meet the standard, the system automatically executes the alarm and stops; when the pure water tank liquid level is lower than the threshold value, the system automatically opens the water replenishment valve until the liquid level is restored.

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