A hydrogen-rich water generating system and a bathtub

Abstract

The application discloses a hydrogen-rich water generating system and a bathtub, and relates to the field of hydrogen-rich water generating systems, which comprises a hydrogen generator, a gas-liquid mixing device and a hydrogen collecting tank, wherein the hydrogen generator is internally provided with hydrogen-rich particles, the hydrogen collecting tank comprises a tank body, an air bag and a water level probe, the air bag is arranged in the tank body, a closed space is formed between the tank body and the air bag, and the water level probe is used for monitoring the water level at the bottom of the air bag; hydrogen generated by the hydrogen generator can enter the tank body and squeeze the air bag to drain water. The hydrogen is generated by using the medicament method, i.e. hydrogen-rich particles, and the water quality is not required, so that a water purification module and an electrolytic hydrogen generation module are not needed, the system is simple, and the use cost of the hydrogen-rich bath is significantly reduced.

Description

Technical Field

[0001] This invention relates to the field of hydrogen water bathing technology, and in particular to a hydrogen-rich water generation system and a bathtub. Background Technology

[0002] Hydrogen-rich water bathing (i.e., bathing in water with a high concentration of dissolved hydrogen molecules) is an emerging health care method in recent years, with its potential benefits primarily based on the biomedical properties of hydrogen molecules. Hydrogen has selective antioxidant capabilities, neutralizing harmful free radicals in the body (such as hydroxyl radicals) and reducing oxidative stress damage, while not affecting the physiological functions of beneficial free radicals. Warm, hydrogen-rich water baths utilize the biological effects of hydrogen molecules to help relieve stress and improve sleep quality (similar to the effects of spa therapy); they can reduce lactic acid buildup and muscle inflammation after exercise, accelerating recovery; and they can also help relieve skin inflammation (such as eczema and dermatitis), sun damage, or chronic skin problems, reducing redness and itching. Therefore, hydrogen-rich water has great potential for application in bathing.

[0003] Currently, hydrogen-rich water baths face two main challenges: hydrogen production and hydrogen dissolution. Hydrogen production technology primarily relies on electrolysis. However, electrolysis requires water treatment (removing ions), typically using a pre-filtration system and an RO membrane to obtain deionized water (pure water), which is then electrolyzed to separate hydrogen and oxygen to produce hydrogen gas. This process is complex and costly, and is currently only widely used in hydrogen-rich water machines. Existing technology essentially integrates a water purification module, an electrolysis hydrogen production module, and a hydrogen dissolution module into a bathtub, resulting in high hydrogen production costs and unsuitability for high-flow-rate applications. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the aforementioned technical problems in related technologies. To this end, the present invention proposes a hydrogen-rich water generation system.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows:

[0006] The present invention also proposes a bathtub having the above-mentioned hydrogen-rich water generation system.

[0007] A hydrogen-rich water generation system according to a first aspect of the present invention includes:

[0008] A hydrogen generator, which is filled with hydrogen-rich particles, is provided with a first water inlet, a first gas outlet and a first drain outlet.

[0009] A gas-liquid mixing device has an air inlet, a water inlet, and a water outlet.

[0010] A hydrogen collection tank includes a tank body, an air bladder, and a water level probe. The air bladder is disposed inside the tank body, and a closed space is formed between the tank body and the air bladder. The tank body is provided with a second air outlet and an air inlet. The air inlet is connected to the first air outlet through a first pipeline, and the second air outlet is connected to the air inlet through a second pipeline. The water level probe is used to monitor the water level at the bottom of the air bladder.

[0011] The bottom of the tank is provided with an inlet and an outlet that communicate with the airbag. The inlet and outlet are used to inject water into the airbag and to drain the water from the airbag. Alternatively, the bottom of the tank is provided with a second inlet and a second outlet that communicate with the airbag. The second inlet is used to inject water into the airbag and the second outlet is used to drain the water from the airbag.

[0012] The hydrogen generated by the hydrogen generator can enter the tank and squeeze the air bladder to drain the water. When the tank is provided with the inlet and outlet, the diameter of the inlet and outlet is configured such that the speed of the water flowing by gravity in the air bladder is less than the speed of the hydrogen generator. When the tank is provided with the second inlet and the second outlet, the diameter of the second outlet is configured such that the speed of the water flowing by gravity in the air bladder is less than the speed of the hydrogen generator.

[0013] The hydrogen-rich water generation system according to embodiments of the present invention has at least the following beneficial effects:

[0014] 1. This invention uses a chemical method, namely hydrogen-rich particles, to produce hydrogen. It has no requirements for water quality. Simply pass tap water into the hydrogen generator to produce hydrogen. There is no need for a water purification module or an electrolysis hydrogen production module. The system is simple and significantly reduces the cost of using hydrogen-rich baths. Moreover, the chemical method produces hydrogen quickly and is suitable for high-flow applications such as bathtubs.

[0015] 2. The difficulty in producing hydrogen using the reagent method lies in the unstable hydrogen generation rate, making it difficult for the gas-liquid mixing device to obtain a continuous and stable hydrogen supply. This leads to large fluctuations in the hydrogen solubility in hydrogen-rich water, and the hydrogen content of the hydrogen-rich water cannot reach the preset ideal range, thus affecting the effect of the hydrogen-rich bath. This invention sets up a hydrogen collection tank between the hydrogen generator and the gas-liquid mixing device. Before hydrogen production, water is injected into the gas bladder to ensure it is inflated. The inflated gas bladder almost occupies all the space inside the tank. The hydrogen generated by the hydrogen generator enters the closed space between the tank and the gas bladder through a first pipeline. As hydrogen accumulates, the gas pressure inside the tank increases, thus squeezing the gas bladder. The water inside the gas bladder is discharged through the inlet / outlet or the second outlet until the water level in the gas bladder drops to the water level probe position, indicating that hydrogen production is complete. This achieves quantitative hydrogen collection, providing a stable hydrogen source for subsequent gas-liquid mixing. Each hydrogen production session can meet the needs of the current use. This invention utilizes the principles of gas pressure and water level sensing to achieve quantitative hydrogen collection. Hydrogen production can continue after the current use is completed, ensuring safety, reliability, and high consistency.

[0016] According to some embodiments of the present invention, the system further includes an inlet pipe and a drain pipe. The inlet pipe is equipped with a first solenoid valve, and the drain pipe is equipped with a second solenoid valve. When the bottom of the tank is provided with the inlet and outlet, the inlet pipe and the drain pipe are connected to the inlet and outlet through a T-joint. When the bottom of the tank is provided with a second inlet and a second outlet, the inlet pipe is connected to the second inlet, and the drain pipe is connected to the second outlet. The second pipe is equipped with a third solenoid valve.

[0017] According to some embodiments of the present invention, the drainage pipeline is provided with a pump for accelerating the drainage of the airbag.

[0018] According to some embodiments of the present invention, a third pipeline and a fourth pipeline are also included, wherein the third pipeline is connected to the first water inlet, the fourth pipeline is connected to the first drain outlet, a fourth solenoid valve is provided on the third pipeline, and a fifth solenoid valve is provided on the fourth pipeline.

[0019] According to some embodiments of the present invention, the diameter of the inlet and outlet is 0.8mm-4.2mm; the diameter of the second outlet is 0.8mm-4.2mm.

[0020] According to some embodiments of the present invention, a one-way valve is provided on the second pipeline, the inlet of the one-way valve is connected to the second air outlet, and the outlet of the one-way valve is connected to the air inlet of the gas-liquid mixing device.

[0021] According to some embodiments of the present invention, the tank is provided with a safety valve.

[0022] According to some embodiments of the present invention, the gas-liquid mixing device is a venturi tube.

[0023] A bathtub according to a second aspect of the present invention includes the hydrogen-rich water generating system.

[0024] According to some embodiments of the present invention, the hydrogen-rich water generation system further includes a multi-stage centrifugal pump, the inlet of the multi-stage centrifugal pump being connected to the outlet of the gas-liquid mixing device through a fifth pipeline, the inlet of the gas-liquid mixing device being connected to the inner cavity of the bathtub through a sixth pipeline, and the outlet of the multi-stage centrifugal pump being connected to the inner cavity of the bathtub through a seventh pipeline.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a first structural schematic diagram of the present invention (airbag inflated with water);

[0028] Figure 2 This is a schematic diagram of the second structure of the present invention (airbag drainage and retraction state).

[0029] Reference numerals in the attached drawings: hydrogen generator 100, hydrogen-rich particles 110, gas-liquid mixing device 200, tank 310, second gas outlet 311, gas inlet 312, safety valve 313, airbag 320, water inlet / outlet 321, water level probe 330, first pipeline 400, second pipeline 500, third solenoid valve 510, water inlet pipeline 600, first solenoid valve 610, drain pipeline 700, second solenoid valve 710, pump 720, third pipeline 800, fourth solenoid valve 810, fourth pipeline 900, fifth solenoid valve 910, multistage centrifugal pump 1000, bathtub 1100, one-way valve 1200. Detailed Implementation

[0030] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0031] Reference Figure 1-2 This embodiment provides a hydrogen-rich water generation system, including:

[0032] The hydrogen generator 100 contains hydrogen-rich particles 110. The hydrogen generator 100 is provided with a first water inlet, a first gas outlet and a first drain outlet. The hydrogen generator 100 does not require electricity. Hydrogen is generated by the contact of the hydrogen-rich particles 110 with water. The hydrogen-rich particles 110 can be silicon-based, magnesium-based or mineral-based hydrogen-rich particles 110. This article does not impose any restrictions.

[0033] The gas-liquid mixing device 200 has an inlet end, a water inlet end, and a water outlet end; the inlet end of the gas-liquid mixing device 200 is used for hydrogen to enter, and water enters from the water inlet end and mixes with hydrogen.

[0034] A hydrogen collection tank includes a tank body 310, an air bladder 320, and a water level probe 330. The air bladder 320 is made of rubber or polyurethane and is located inside the tank body 310, forming a closed space between the tank body 310 and the air bladder 320. This closed space is not connected to the inlet / outlet 321 / second drain outlet. The tank body 310 is provided with a second air outlet 311 and an air inlet 312. The air inlet 312 is connected to the first air outlet through a first pipe 400, and the second air outlet 311 is connected to the air inlet through a second pipe 500. The water level probe 330 is located at the bottom inside the air bladder 320 and is used to monitor the water level at the bottom of the air bladder 320.

[0035] The bottom of the tank body 310 is provided with an inlet and outlet 321 that communicates with the airbag 320. The inlet and outlet 321 is used to inject water into the airbag 320 and to discharge water from the airbag 320. Alternatively, the bottom of the tank body 310 is provided with a second inlet and a second outlet that communicate with the airbag 320. The second inlet is used to inject water into the airbag 320 and the second outlet is used to discharge water from the airbag 320.

[0036] The hydrogen generated by the hydrogen generator 100 can enter the tank 310 and compress the air bladder 320 to drain the water. When the tank 310 has an inlet / outlet 321 at the bottom, the diameter of the inlet / outlet 321 is configured such that the gravity flow rate of the air bladder 320 is less than the gas production rate of the hydrogen generator 100. When the tank 310 has a second inlet and a second outlet at the bottom, the diameter of the second outlet is configured such that the gravity flow rate of the air bladder 320 is less than the gas production rate of the hydrogen generator 100. With a second inlet and a second outlet, compared to a single inlet / outlet 321, the water inlet and outlet of the air bladder 320 do not interfere with each other. The diameter of the second inlet is not limited and can be made larger than the second outlet, increasing the water injection speed.

[0037] The "gravity flow rate of water in airbag 320" refers to a situation where no hydrogen gas is introduced into tank 310, airbag 320 is not under gas pressure, and the water flows out of inlet / outlet 321 / second drain outlet solely due to the gravity of the water inside airbag 320. The "velocity" in "gravity flow rate" refers to the volume of water flowing out per unit time. The gravity flow rate Q of airbag 320 is related to the diameter d of inlet / outlet 321 / second drain outlet and the head height h (the vertical height from the liquid surface inside airbag 320 to the drain outlet), and the following relationship exists among the three: Where A = πd 2 / 4, C dHere, is the flow coefficient (typically 0.58-0.62), and g is the acceleration due to gravity. During drainage, the water head height h inside the airbag 320 continuously decreases over time, and the velocity Q of the gravity-driven water flow also gradually decreases. Therefore, this invention only needs to ensure that the velocity of the gravity-driven water flow is less than the gas production velocity of the hydrogen generator 100 when the water head height of the airbag 320 is at its maximum. According to the above relationship, the diameter of the inlet / outlet 321 has a much greater impact on the gravity-driven water flow than the volume of the airbag 320 (the volume of the airbag 320 determines the maximum water head height). The smaller the diameter of the inlet / outlet 321 / second drain outlet, the slower the gravity-driven water flow velocity. "Gaseous production rate" refers to the amount of hydrogen produced per unit time. In this invention, the hydrogen production rate is determined by the total amount of hydrogen-rich particles 110 (i.e., the amount of hydrogen-rich particles 110 loaded in the hydrogen generator 100). The hydrogen-rich particles 110 can be of a type with stable activity at the inlet water temperature, exhibiting small fluctuations in reaction rate at the inlet water temperature. When the total amount of hydrogen-rich particles 110 is constant, the gas production rate of the hydrogen generator 100 can be controlled within a certain range. To avoid the impact of gravity-driven water flow on hydrogen collection, this invention makes the diameter of the inlet / outlet 321 / second drain outlet very narrow, making the range of gas production rate much larger than the range of gravity-driven water flow rate, thus making the drainage effect caused by hydrogen pressure much greater than the influence of gravity-driven water flow. For example, if the hydrogen production rate of a certain hydrogen-rich particle at 25°C is 0.1 ml / (s·g), and 150-300g of hydrogen-rich particles are loaded into a hydrogen generator, 15mL-30mL of hydrogen can be produced per second. In this case, the diameter of the inlet / outlet / second drain can be designed to be 3mm, and the water head height after the airbag is filled with water is 10cm. Then the maximum speed of the gravity flow of water in the airbag is about 6ml / s. The gas production speed is always greater than the speed of gravity flow of water throughout the hydrogen production process, and hydrogen can be squeezed into the airbag to produce water at 320°C.

[0038] The challenge of using the reagent method to produce hydrogen lies in the mismatch between the hydrogen generation rate and the required hydrogen inlet rate of the gas-liquid mixing device 200. This makes it difficult for the gas-liquid mixing device 200 to obtain a specific flow rate of hydrogen, and the hydrogen content of the hydrogen-rich water cannot reach the preset ideal range, thus affecting the effect of the hydrogen-rich bath. For example, if the hydrogen generation rate is too fast, too much hydrogen will enter the gas-liquid mixing device 200 in a short time, resulting in excessively high hydrogen solubility in the hydrogen-rich water, or a large amount of hydrogen may not dissolve completely, causing resource waste and safety risks. If the hydrogen generation rate is too slow, the hydrogen solubility in the hydrogen-rich water will be too low, resulting in a poor user experience. Normally, in order to extend the replacement time of hydrogen-rich particles 110, a larger capacity hydrogen generator 100 is used to load more hydrogen-rich particles 110 at a time, thereby increasing the number of times the hydrogen-rich particles 110 can be recycled. However, as mentioned earlier, the larger the total amount of hydrogen-rich particles 110 used, the faster the gas production rate. If the large amount of hydrogen produced by the hydrogen generator 100 is directly input into the gas-liquid mixing device 200, it will inevitably lead to resource waste and safety risks.

[0039] The working process of the hydrogen-rich water generation system in this embodiment is as follows: Water is injected into the gas bladder 320 before hydrogen production to ensure that the gas bladder 320 is in an inflated state. The inflated gas bladder 320 almost occupies all the space inside the tank 310. The hydrogen generated by the hydrogen generator 100 enters the closed space between the tank 310 and the gas bladder 320 through the first pipeline 400. As the hydrogen accumulates, the gas pressure inside the tank increases, which in turn squeezes the gas bladder 320. The water in the gas bladder 320 is discharged through the inlet / outlet 321 or the second outlet until the water level in the gas bladder 320 drops to the position of the water level probe 330, indicating that the hydrogen production is complete. This achieves quantitative collection of hydrogen and provides a stable source of hydrogen for subsequent gas-liquid mixing. Each hydrogen production can meet the needs of the current use. Once hydrogen collection is complete and hydrogen-rich water preparation begins, the hydrogen in tank 310 is drawn out through the second outlet 311 into the gas-liquid mixing device 200. Simultaneously, water is injected into the gas bag 320 (this water injection is different from the water injection before hydrogen production; the volume of water injected should be equal to or synchronized with the volume of hydrogen extracted, which can be achieved through algorithm control). Otherwise, as hydrogen is continuously extracted, a certain degree of vacuum will form inside the tank, increasing the difficulty of hydrogen extraction. Synchronous water injection can ensure stable hydrogen extraction.

[0040] In some embodiments of the present invention, an inlet pipe 600 and a drain pipe 700 are also included. A first solenoid valve 610 is provided on the inlet pipe, and a second solenoid valve 710 is provided on the drain pipe 700. When the bottom of the tank 310 is provided with an inlet / outlet 321, the inlet pipe 600 and the drain pipe 700 are connected to the inlet / outlet 321 through a T-joint. When the bottom of the tank 310 is provided with a second inlet and a second outlet, the inlet pipe 600 is connected to the second inlet, and the drain pipe 700 is connected to the second outlet. A third solenoid valve 510 is provided on the second pipe 500. By installing solenoid valves on each pipe and controlling the opening and closing of the solenoid valves through a program, the entire process of "water injection-hydrogen production-drainage-gas supply" is automated without manual intervention, thus improving the user experience.

[0041] In some embodiments of the present invention, a pump 720 is provided on the drainage pipe 700 to accelerate the drainage of the gasbag 320. Before each hydrogen production, the water injected into the gasbag 320 during the previous hydrogen absorption needs to be drained, and then a certain amount of water is injected to ensure the consistency of hydrogen collection each time. The present invention accelerates the emptying of the gasbag 320 by setting a pump 720 on the drainage pipe 700 to extract the water from the gasbag 320.

[0042] In some embodiments of the present invention, a third pipeline 800 and a fourth pipeline 900 are also included. The third pipeline 800 is connected to the first water inlet, and the fourth pipeline 900 is connected to the first drain outlet. A fourth solenoid valve 810 is provided on the third pipeline 800, and a fifth solenoid valve 910 is provided on the fourth pipeline 900. After water is added before hydrogen production, the control module gives a hydrogen production signal, controls the fourth solenoid valve 810 to open, and tap water is introduced into the hydrogen generator 100 to start hydrogen production. When the water level probe 330 detects that the water level in the gasbag 320 has dropped to the bottom, the control module gives a hydrogen production completion signal, controls the fifth solenoid valve 910 to open, and the water in the hydrogen generator 100 is discharged through the first drain outlet, and the reaction of the hydrogen-rich particles 110 stops.

[0043] In some embodiments of the present invention, the diameter of the inlet / outlet 321 is 0.8mm-4.2mm; the diameter of the second outlet is 0.8mm-4.2mm. The design of the diameter of the inlet / outlet 321 / second outlet needs to take into account the influence of gravity flow and the timeliness of water inlet / outlet.

[0044] In some embodiments of the present invention, a one-way valve 1200 is provided on the second pipeline 500. The inlet of the one-way valve 1200 is connected to the second air outlet 311, and the outlet of the one-way valve 1200 is connected to the air inlet of the gas-liquid mixing device 200. The one-way valve 1200 prevents liquid in the gas-liquid mixing device 200 from flowing back into the tank 310.

[0045] In some embodiments of the present invention, a safety valve 313 is provided on the tank 310. If the hydrogen pressure inside the tank 310 exceeds a threshold, the safety valve 313 opens, controlling the automatic discharge of hydrogen.

[0046] In some embodiments of the present invention, the gas-liquid mixing device 200 is a Venturi tube. The negative pressure at the throat of the Venturi tube provides the power for hydrogen to flow from the tank 310 to the gas-liquid mixing device 200. When water flows through the throat of the Venturi tube, the flow velocity increases sharply due to the reduction in cross-sectional area, and the fluid pressure decreases accordingly, forming a negative pressure zone. At this time, hydrogen in the tank 310 is drawn into the throat through the second pipe 500 under the action of the pressure difference and mixes with the water flow. The advantage of using a Venturi tube is that no additional power source (such as an air pump 720) is required; the hydrogen intake and mixing can be completed solely by the kinetic energy of the liquid's own flow, reducing system energy consumption and complexity.

[0047] A bathtub 1100 includes a hydrogen-rich water generation system.

[0048] In some embodiments of the present invention, the hydrogen-rich water generation system further includes a multi-stage centrifugal pump 1000. The inlet of the multi-stage centrifugal pump 1000 is connected to the outlet of the gas-liquid mixing device 200 via a fifth pipe, the inlet of the gas-liquid mixing device 200 is connected to the inner cavity of the bathtub 1100 via a sixth pipe, and the outlet of the multi-stage centrifugal pump 1000 is connected to the inner cavity of the bathtub 1100 via a seventh pipe. The multi-stage centrifugal pump 1000 provides power for circulation, allowing water to continuously flow through the venturi tube at a set flow rate. Hydrogen and water are initially mixed in the venturi tube, and then further mixed and cut within the multi-stage centrifugal pump 1000. The multi-stage centrifugal pump 1000 has multiple impellers that cut air bubbles in the water, ensuring the solubility of hydrogen in the water and achieving the best bathing effect.

[0049] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A hydrogen-rich water generation system, characterized in that, include: A hydrogen generator (100) is filled with hydrogen-rich particles (110). The hydrogen generator (100) is provided with a first water inlet, a first gas outlet and a first drain outlet. A gas-liquid mixing device (200) has an air inlet, a water inlet, and a water outlet; A hydrogen collection tank includes a tank body (310), an air bladder (320), and a water level probe (330). The air bladder (320) is located inside the tank body (310), forming a closed space between the tank body (310) and the air bladder (320). The tank body (310) is provided with a second air outlet (311) and an air inlet (312). The air inlet (312) is connected to the first air outlet through a first pipe (400), and the second air outlet (311) is connected to the air inlet through a second pipe (500). The water level probe (330) is used to monitor the water level at the bottom of the air bladder (320). The bottom of the tank (310) is provided with an inlet and outlet (321) communicating with the airbag (320). The inlet and outlet (321) are used to inject water into the airbag (320) and to discharge water from the airbag (320). Alternatively, the bottom of the tank (310) is provided with a second inlet and a second outlet communicating with the airbag (320). The second inlet is used to inject water into the airbag (320), and the second outlet is used to discharge water from the airbag (320). The hydrogen generated by the hydrogen generator (100) can enter the tank (310) and squeeze the airbag (320) to drain the water. When the tank (310) is provided with the inlet and outlet (321) at the bottom, the diameter of the inlet and outlet (321) is configured such that the speed of the water flowing by gravity of the airbag (320) is less than the gas production speed of the hydrogen generator (100). When the tank (310) is provided with the second inlet and the second outlet at the bottom, the diameter of the second outlet is configured such that the speed of the water flowing by gravity of the airbag (320) is less than the gas production speed of the hydrogen generator (100).

2. The hydrogen-rich water generation system according to claim 1, characterized in that, It also includes an inlet pipe (600) and a drain pipe (700). The inlet pipe is equipped with a first solenoid valve (610), and the drain pipe (700) is equipped with a second solenoid valve (710). When the bottom of the tank (310) is provided with the inlet and outlet (321), the inlet pipe (600) and the drain pipe (700) are connected to the inlet and outlet (321) through a three-way connector. When the bottom of the tank (310) is provided with the second inlet and the second outlet, the inlet pipe (600) is connected to the second inlet, and the drain pipe (700) is connected to the second outlet. The second pipe (500) is equipped with a third solenoid valve (510).

3. The hydrogen-rich water generation system according to claim 2, characterized in that, The drainage pipe (700) is equipped with a pump (720) for accelerating the drainage of the airbag (320).

4. The hydrogen-rich water generation system according to claim 3, characterized in that, It also includes a third pipe (800) and a fourth pipe (900), the third pipe (800) being connected to the first water inlet, the fourth pipe (900) being connected to the first drain outlet, the third pipe (800) being equipped with a fourth solenoid valve (810), and the fourth pipe (900) being equipped with a fifth solenoid valve (910).

5. The hydrogen-rich water generation system according to claim 1, characterized in that, The diameter of the inlet / outlet (321) is 0.8mm-4.2mm; the diameter of the second outlet is 0.8mm-4.2mm.

6. The hydrogen-rich water generation system according to claim 1, characterized in that, The tank (310) is equipped with a safety valve (313).

7. The hydrogen-rich water generation system according to claim 1, characterized in that, The gas-liquid mixing device (200) is a venturi tube.

8. The hydrogen-rich water generation system according to claim 1, characterized in that, The second pipeline is equipped with a one-way valve (1200), the inlet of which is connected to the second air outlet, and the outlet of which is connected to the air inlet of the gas-liquid mixing device.

9. A bathtub, characterized in that, Includes the hydrogen-rich water generation system according to any one of claims 1-8.

10. The bathtub according to claim 9, characterized in that, The hydrogen-rich water generation system also includes a multi-stage centrifugal pump (1000). The inlet of the multi-stage centrifugal pump (1000) is connected to the outlet of the gas-liquid mixing device (200) through a fifth pipeline. The inlet of the gas-liquid mixing device (200) is connected to the inner cavity of the bathtub (1100) through a sixth pipeline. The outlet of the multi-stage centrifugal pump (1000) is connected to the inner cavity of the bathtub (1100) through a seventh pipeline.

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