A high-efficiency dissolved oxygen-rich water preparation device

Abstract

The application discloses a kind of high-efficiency dissolved oxygen-enriched water preparation device, the oxygen-enriched water preparation device includes shell, water purification module, oxygen preparation module, oxygen-enriched water storage tank, micro-nano oxygen dissolving module, drive motor and intelligent control module;Water purification module is used to purify tap water to provide pure water to oxygen-enriched water storage tank;Oxygen preparation module is used to prepare oxygen with purity greater than 90% by air, and the prepared oxygen is transported to micro-nano oxygen dissolving module;Micro-nano oxygen dissolving module is installed in oxygen-enriched water storage tank, and is driven by drive motor, for generating oxygen-enriched water;Intelligent control module is used to control water purification module, oxygen preparation module and drive motor according to received instruction, and closed-loop feedback control is carried out on oxygen preparation module and drive motor according to the oxygen concentration of oxygen-enriched water.The above-mentioned oxygen-enriched water preparation device can be dissolved in water with very high efficiency and stability, realize the efficient fusion of water and oxygen.

Description

Technical Field

[0001] This invention belongs to the field of drinking water treatment technology, specifically relating to a highly efficient oxygen-enriched water preparation device. Background Technology

[0002] Oxygen-enriched water, as a functional drinking water, is gaining increasing market attention. Oxygen-enriched water refers to drinking water with a dissolved oxygen content significantly higher than the natural saturation level, achieved through specific technologies. Its core advantage is that it provides the body with additional dissolved oxygen while replenishing fluids, making it suitable for specific needs.

[0003] Oxygen-enriched water undergoes a special process to increase its dissolved oxygen content. Drinking it not only replenishes the body's fluids but also provides additional oxygen. This characteristic distinguishes it from ordinary drinking water, allowing for a more direct delivery of oxygen to the body and meeting basic oxygen needs. During exercise, the body's oxygen consumption increases while simultaneously losing significant amounts of water. Drinking oxygen-enriched water can quickly replenish the water lost during exercise, and its additional oxygen content can support recovery, helping to alleviate post-exercise fatigue caused by oxygen and dehydration. Furthermore, in situations where oxygen levels are relatively low or oxygen consumption is increased, oxygen-enriched water can serve as a convenient oxygen-carrying beverage. For example, during short stays in low-oxygen environments at high altitudes or when engaging in intense mental work that increases brain oxygen consumption, drinking oxygen-enriched water can provide a certain level of oxygen supplementation.

[0004] To meet market demand, various oxygen-enriched water preparation methods have been developed, but they all have various technical limitations. The technologies currently available on the market are as follows.

[0005] 1. Water electrolysis for oxygen production technology, such as the Chinese invention patent application CN101519254A which discloses an oxygen-enriched water generator, uses a first electrolysis cell to electrolyze purified water to produce oxygen, and then dissolves the oxygen in the water through a dissolving tank. A utility model patent CN2820846Y also simultaneously produces ozone water for disinfection. However, this technology has inherent drawbacks: relatively low electrolysis efficiency and high energy consumption; some electrolysis schemes require the use of alkaline electrolyte solutions to improve conductivity, leading to potential safety risks and maintenance complexity; furthermore, the electrolysis process inevitably produces hydrogen gas and may generate acidic or alkaline byproduct water, requiring complex systems for separation and management; long-term operation may also lead to electrode corrosion or degradation, posing a risk of metal ion precipitation and water pollution; although improved solutions such as "Sho's membrane-free water electrolysis technology" have emerged, balancing oxygen production efficiency, energy consumption, purity, and long-term operational safety in compact household appliances remains a significant challenge.

[0006] 2. External gas source and mechanical mixing oxygenation technology: This technology separates the oxygen generation and dissolution processes, typically using an external high-purity oxygen source (such as an oxygen cylinder) and mechanically forcibly dissolving the oxygen. Chinese patent application CN1803661A discloses a representative device that uses a gas-liquid mixer. It disrupts the intermolecular forces of water molecules through high shear force, high-speed stirring, and impact force, ensuring thorough mixing of oxygen and water. Its unique feature is the addition of an "energizer" that uses a high-intensity alternating magnetic field to act on the oxygen-water mixture, claiming to rearrange oxygen and water molecules into a "relatively stable associated state," thereby obtaining stable oxygen-enriched water with high dissolved oxygen content. This technology reveals a key problem: simple aeration or stirring is insufficient to achieve high concentrations and stable dissolved oxygen; complex physical methods are necessary to enhance the dissolution process. However, this technical solution relies on an external oxygen source, which, for home or office environments, means the need to regularly replace bulky and potentially unsafe high-pressure oxygen cylinders, resulting in a poor user experience and low convenience.

[0007] 3. Pressure Swing Adsorption (PSA) air separation oxygen generation technology: PSA technology provides a safe and convenient on-site oxygen generation solution. It directly separates high-purity oxygen from ambient air without the need for chemical electrolysis or external gas cylinders. Chinese utility model patent CN210457463U discloses a variable frequency PSA oxygen generator. Unlike traditional fixed-parameter PSA systems, this system integrates a control system linked to an oxygen analyzer. This control system can automatically extend or shorten the adsorption time and adjust the air compressor's operating frequency based on real-time monitored oxygen purity data. This intelligent feedback control mechanism not only effectively maintains oxygen purity at a constant value, but more importantly, it significantly improves air utilization, reduces unnecessary conversion emissions, and slows down the air compressor's loading and unloading frequency, thereby greatly saving power consumption. This advancement elevates PSA technology from simply "producing oxygen" to "producing oxygen efficiently and intelligently," providing an ideal technological foundation for developing low-energy, high-performance home oxygen generators.

[0008] In summary, existing technologies have the following drawbacks when applied to the development of practical, efficient, and convenient household or commercial water dispensers:

[0009] First, there is the problem of systemic inefficiency and high energy consumption. The low energy conversion efficiency of the water electrolysis oxygen production scheme leads to excessively high power consumption per unit volume of oxygen-enriched water. Furthermore, the complex mechanical mixing and magnetic field enhancement systems also require high-power pumps and electromagnets, resulting in significant energy consumption. Even with highly efficient variable frequency PSA oxygen generators, because they are independent devices, their operation is completely disconnected from the subsequent dissolution process, making it impossible to achieve energy optimization throughout the entire process.

[0010] Second, the lack of true integration and user convenience results in fragmented technologies. On the one hand, highly efficient dissolution technologies, such as nanobubble generators and magnetic field power replenishers, rely on external oxygen cylinders, causing significant inconvenience for users in terms of storage, replacement, and safety management. On the other hand, electrolysis solutions that integrate gas sources often employ relatively simple gas dissolution methods, resulting in unsatisfactory dissolution efficiency and stability.

[0011] Third, the dissolved oxygen in currently available oxygen-enriched water preparation devices is unstable and has low saturation. Oxygen-enriched water produced by simple aeration or stirring methods experiences rapid oxygen loss and cannot maintain a high concentration for extended periods. While magnetic field treatment and nanobubble technology can effectively address the stability issue, they are not integrated with equally advanced and efficient on-site oxygen generation technologies.

[0012] Fourth, there is a lack of intelligent and dynamic collaborative control. In existing technologies, the oxygen generation unit and the dissolved oxygen unit (if they exist simultaneously) operate as two independent systems. The oxygen generator's gas production is not dynamically adjusted based on the real-time demand of the dissolved oxygen unit or the user's water intake rate. This "open-loop" control mode results in the oxygen generator still operating at full load or according to a preset program when the user's water intake is low or the system is in standby mode, causing a significant waste of oxygen and electricity, and failing to guarantee optimal dissolution results under various operating conditions. Summary of the Invention

[0013] To address the problems existing in the prior art, this invention provides a highly efficient oxygen-enriched water preparation device. This device features integrated processing, compact structure, and high energy efficiency. It can efficiently produce high-purity oxygen from ambient air on demand and dissolve it in water with extremely high efficiency and stability, achieving efficient fusion of water and oxygen. Furthermore, the entire process is coordinated and optimized by an intelligent control system, thereby completely solving the problems of system fragmentation, high energy consumption, simple control logic, and poor user experience in the prior art.

[0014] To achieve the above objectives, the present invention adopts the following specific technical solution: In a first aspect, the present invention provides a highly efficient oxygen-enriched water preparation device, which includes a housing, a water purification module, an oxygen generation module, a micro-nano oxygen dissolution module, a drive motor, and an intelligent control module. The water purification module, the oxygen generation module, the oxygen-enriched water storage tank, and the drive motor are installed inside the housing; The water purification module is used to purify tap water to provide pure water to the oxygen-enriched water storage tank; The oxygen generation module is used to generate oxygen with a purity greater than 90% from air and deliver the generated oxygen to the micro-nano oxygen dissolution module. The micro-nano oxygen dissolution module is installed in the oxygen-enriched water storage tank and is driven by the drive motor to dissolve the oxygen produced by the oxygen generation module in the pure water provided by the water purification module to generate oxygen-enriched water. The intelligent control module is used to control the water purification module, the oxygen generation module, and the drive motor according to the received instructions, and to perform closed-loop feedback control of the oxygen generation module and the drive motor according to the dissolved oxygen concentration of the oxygen-enriched water.

[0015] Furthermore, it also includes a pure water storage tank; The water purification module, the pure water storage tank, and the oxygen-enriched water storage tank are all installed in the middle of the casing. The pure water storage tank is used to store pure water purified by the water purification module; the pure water storage tank is equipped with a water pump for pumping pure water to the oxygen-enriched water storage tank and a float-type liquid level sensor for controlling the start and stop of the water purification module. Both the water pump and the float-type liquid level sensor are connected to the intelligent control module. Both the pure water storage tank and the oxygen-enriched water storage tank are sealed water tanks made of food-grade stainless steel or PP material.

[0016] Furthermore, the water inlet of the water purification module is connected to the tap water pipe through an inlet solenoid valve, and the water outlet is connected to the pure water storage tank. The water purification module includes a PP cotton filter element, a granular activated carbon filter element, a reverse osmosis membrane filter element, and an activated carbon filter element arranged in sequence.

[0017] Furthermore, the intelligent control module includes a control panel, a microcontroller, and a dissolved oxygen sensor; The control panel is fixedly installed on the top of the casing; The dissolved oxygen sensor is installed inside the oxygen-enriched water storage tank and is used to detect the dissolved oxygen concentration of the oxygen-enriched water in the tank. The microcontroller is installed in the upper part of the housing and is connected to the dissolved oxygen sensor, the control panel, the water pump, the water inlet solenoid valve, the float-type liquid level sensor, and the drive motor.

[0018] Furthermore, the dissolved oxygen sensor is an optical sensor; The microcontroller employs hysteresis comparison logic to avoid frequent start-stop cycles near the target concentration point.

[0019] Furthermore, the micro / nano oxygen dissolution module includes a housing, a stator, and a rotor arranged coaxially from the outside to the inside; the housing is provided with an outlet and an inlet connected to the oxygen generation module via a pipeline; the rotor is rotatably mounted on the housing; the stator is fixedly mounted inside the housing; an outer cavity is formed between the housing and the stator; and an inner cavity is formed between the stator and the rotor. The inner circumferential surface of the stator is formed by a plurality of circumferentially distributed planes connected in sequence; the stator is provided with stepped holes that penetrate its wall thickness and correspond one-to-one with each plane; the stepped holes form eccentrically arranged slits on the corresponding planes for connecting the inner cavity and the outer cavity; the slits extend along the axial direction of the rotor; an expansion zone and a contraction zone are formed on both sides of the minimum radial clearance between the outer circumferential surface of the rotor and each plane; the slits are all located within the expansion zone; The drive motor is fixedly installed on the top of the oxygen-enriched water storage tank and is connected to the microcontroller via signal; the output shaft of the drive motor passes through the oxygen-enriched water storage tank and is fixedly connected to the rotor to drive the rotor to rotate. Pure water and oxygen entering the housing are combined under the rotation of the rotor to form oxygen-enriched water, which then flows out through the outlet.

[0020] Furthermore, it also includes air compressors; Both the oxygen generating module and the air compressor are installed inside the bottom of the housing; The air compressor is connected to the microcontroller and is used to filter and pressurize ambient air and send it to the oxygen generation module.

[0021] Furthermore, the oxygen generation module is a pressure swing adsorption (PSA) oxygen generation module, including adsorption tower A and adsorption tower B filled with zeolite molecular sieves, an oxygen buffer tank, and a set of solenoid valve arrays controlled by the microcontroller.

[0022] Furthermore, it also includes a temperature regulation device installed inside the housing, as well as sound insulation material and shock-absorbing feet located at the bottom of the housing; The temperature regulating device is installed in the outlet pipe of the oxygen-enriched water storage tank. A water outlet solenoid valve is installed in the outlet pipeline; The intelligent control module is used to control the temperature regulating device and the water outlet solenoid valve.

[0023] Secondly, the present invention also provides a control method for the above-mentioned oxygen-enriched water preparation device, the control method comprising the following steps: Set the target value and activation threshold for dissolved oxygen concentration in oxygen-enriched water; Real-time monitoring of the actual dissolved oxygen concentration in the oxygen-enriched water storage tank. Compare the actual dissolved oxygen concentration with the set target value for dissolved oxygen concentration; When the actual dissolved oxygen concentration is lower than the preset target value and lower than the start-up threshold, the water purification module, oxygen generation module and drive motor are started to produce oxygen-enriched water. When the actual dissolved oxygen concentration reaches or exceeds the preset target value, the water purification module, oxygen generation module, and drive motor are stopped, and the system enters standby monitoring mode.

[0024] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: 1. The oxygen-enriched water preparation device of the present invention adopts a micro-nano oxygen dissolution module, which forces oxygen to dissolve efficiently through physical means to form a stable and long-lasting supersaturated solution. This not only increases the oxygen concentration several times, but more importantly, its stability also jumps from the minute level to the hour level, ensuring that users can obtain real and effective health benefits when drinking it.

[0025] 2. The oxygen-enriched water preparation device of the present invention adopts the synergistic effect of two major technologies: pressure swing adsorption (PSA) oxygen generation module and micro-nano oxygen dissolution module. The pressure swing adsorption (PSA) oxygen generation module can provide oxygen with a purity of over 90% as a gas source. Compared with using air, the oxygen partial pressure is increased by 4.5 times, which greatly enhances the driving force of gas dissolution from the source, thereby enabling the preparation of oxygen-enriched water with high dissolution efficiency and concentration level.

[0026] 3. The oxygen-enriched water preparation device of this invention introduces a closed-loop feedback control system based on a dissolved oxygen (DO) sensor. This enables the device to achieve intelligent, consistent, and verifiable output quality, completely changing the traditional "blind production" model of oxygen-enriched water equipment. The system is no longer simply "on" or "off," but makes intelligent decisions based on real-time water quality data, precisely "anchoring" the dissolved oxygen concentration to the user-set target value. This ensures that every cup of water has the same high-quality, verifiable dissolved oxygen index, providing users with unprecedented product consistency and reliability.

[0027] 4. Traditional oxygen-enriched water equipment typically operates continuously or on a timer, both of which result in significant energy waste. The oxygen-enriched water preparation device of this invention achieves true "on-demand service" through an intelligent control module, possessing superior energy efficiency and an on-demand operating mode. The main energy-consuming components of the equipment—the air compressor, water pump, and motor—only start working when the dissolved oxygen concentration is below a set threshold. Once the target value is reached, it immediately enters a low-power standby monitoring state. This operating mode greatly reduces the average power consumption and operating noise of the equipment, making it fully compliant with modern household requirements for energy-saving, environmentally friendly, and quiet home appliances.

[0028] 5. The oxygen-enriched water preparation device of the present invention adopts a highly integrated, safe and reliable home-use design. It successfully miniaturizes, integrates and optimizes professional technologies applied in the fields of medical, industrial and environmental engineering, and integrates them into a compact housing. It extracts safe low-pressure oxygen from ambient air through a pressure swing adsorption (PSA) oxygen generation module, completely avoiding the safety hazards of using high-pressure oxygen cylinders and avoiding the by-product problems that may exist in the water electrolysis method. The entire system operates automatically. Users only need to make simple settings to enjoy high-quality oxygen-enriched water, which has extremely high safety and convenience.

[0029] The oxygen-enriched water preparation device of the present invention is suitable for various scenarios that require the provision of high-quality oxygen-enriched drinking water, such as homes, offices, and gyms. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the principle structure of the oxygen-enriched water preparation device of the present invention; Figure 2 This is a schematic diagram of the water purification module. Figure 3 This is a cross-sectional view of the micro / nano oxygen dissolution module; Figure 4 This is a top view of the micro / nano oxygen dissolution module.

[0031] Figure label: 1-Casing, 2-Water purification module, 3-Oxygen generation module, 4-Micro-nano oxygen dissolution module, 5-Intelligent control module, 6-Inlet solenoid valve, 7-Pure water storage tank, 8-Oxygen-enriched water storage tank, 9-Air compressor, 10-Temperature control device, 11-Outlet solenoid valve, 12-Water pump, 13-Dissolved oxygen sensor, 41-Casing, 42-Stator, 43-Rotor, 44-Outer cavity, 45-Inner cavity, 46-Stepped hole, 47-Expansion zone, 48-Contraction zone, 411-Inlet, 412-Outlet. Detailed Implementation

[0032] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] In the description of this invention, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Those skilled in the art can understand the specific meaning of these terms in this invention based on the specific circumstances. Furthermore, in the description of this invention, unless otherwise stated, "multiple" refers to two or more. "And / or" describes the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. The character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0034] Example 1 This embodiment provides a highly efficient apparatus for preparing oxygen-enriched water, such as... Figure 1 As shown, the oxygen-enriched water preparation device includes a housing 1, a water purification module 2, an oxygen generation module 3, a micro-nano oxygen dissolution module 4, a drive motor, an intelligent control module 5, a pure water storage tank 7, an oxygen-enriched water storage tank 8, and an air compressor 9. The oxygen generation module 3 and the air compressor 9 are installed at the bottom inside the housing 1; the water purification module 2, oxygen generation module 3, pure water storage tank 7, and oxygen-enriched water storage tank 8 are all installed inside the housing 1; and the intelligent control module 5 is installed at the top inside the housing 1. High-purity oxygen produced by the oxygen generation module 3 is input into the micro-nano bubble dissolution module, and pure water produced by the water purification module 2 is input into the oxygen-enriched water storage tank 8, producing high-purity oxygen-enriched water.

[0035] The air compressor 9 is connected to the microcontroller signal of the intelligent control module 5, and is used to filter and pressurize the ambient air and send it to the oxygen generation module 3.

[0036] Water purification module 2 is used to purify tap water to provide pure water to oxygen-enriched water storage tank 8, thus providing a water source from tap water; such as Figure 2 As shown, the inlet of the water purification module 2 is connected to the tap water pipe through the inlet solenoid valve 6, and the outlet is connected to the pure water storage tank 7. The water purification module 2 includes a PP cotton filter, a granular activated carbon filter, a reverse osmosis membrane filter, and an activated carbon filter arranged in sequence. The first-stage PP cotton filter of the water purification module 2 is used to remove large particulate impurities such as rust and sediment. The second-stage granular activated carbon (GAC) filter is used to adsorb residual chlorine, odors, and some organic matter. The third-stage reverse osmosis (RO) membrane filter is the core filtration unit, used to physically remove heavy metals, bacteria, viruses, scale, etc. The fourth-stage post-activated carbon (T33) filter is used to further improve the taste.

[0037] Oxygen generation module 3 is used to produce oxygen with a purity greater than 90% from air and deliver the produced oxygen to the micro / nano oxygen dissolution module 4; oxygen generation module 3 uses ambient air as its gas source. Oxygen generation module 3 employs pressure swing adsorption (PSA), which, based on the physical principle of pressure swing adsorption, directly separates and produces high-purity oxygen from ambient air. The core components of pressure swing adsorption oxygen generation module 3 include adsorption towers A and B filled with zeolite molecular sieves, an oxygen buffer tank, and a set of solenoid valve arrays controlled by a microcontroller. The working process of pressure swing adsorption oxygen generation module 3 begins with the adsorption stage. Upon startup, air compressor 9 pressurizes the filtered and dust-removed ambient air (e.g., to 1.5-2.5 bar) and sends it into adsorption tower A. Under this pressure, the micropores of the zeolite molecular sieve have a strong affinity for nitrogen molecules, which are larger in size and polarity, and adsorb them in large quantities. Oxygen molecules, however, are not easily adsorbed and pass smoothly through adsorption tower A into the oxygen buffer tank for collection. This process lasts for tens of seconds until adsorption tower A is near saturation. Afterwards, desorption and switching occur. At this point, compressed air is introduced into adsorption tower B via a switching solenoid valve to begin a new adsorption cycle. Simultaneously, adsorption tower A is connected to the atmosphere, and its pressure drops rapidly. Previously adsorbed impurities such as nitrogen are desorbed from the molecular sieve under the pressure gradient and discharged back into the atmosphere. The two adsorption towers in the pressure swing adsorption oxygen generation module 3 work alternately, one adsorbing and the other desorbing, forming a continuous cycle that continuously produces high-concentration oxygen with a stable purity of 93±3%. This embodiment uses a highly integrated, low-noise, compact pressure swing adsorption oxygen generation module 3. For example, its dimensions can be controlled within 45cm×30cm×70cm, allowing it to be completely integrated into the housing 1. The start and stop of this pressure swing adsorption oxygen generation module 3 are entirely managed by the intelligent control module 5 according to dissolved oxygen demand, achieving on-demand oxygen production and avoiding unnecessary energy consumption and noise.

[0038] The micro / nano oxygen dissolution module 4 is installed inside the oxygen-enriched water storage tank 8 and is driven by a motor to dissolve the oxygen produced by the oxygen generation module 3 in the pure water provided by the water purification module 2 to generate oxygen-enriched water. The micro / nano oxygen dissolution module 4 includes a housing 41, a stator 42, and a rotor 43 arranged coaxially from the outside in; as shown... Figure 3 and Figure 4As shown, the housing 41 can be a cylindrical structure with end caps at both ends, and is provided with an inlet 411 and an outlet 412. The inlet 411 is connected to the oxygen generating module 3 through a pipeline, and is used to transport the oxygen generated by the oxygen generating module 3 into the housing 41 through the pipeline. The rotor 43 is rotatably mounted on the housing 41. The stator 42 is fixedly mounted inside the housing 41. An outer cavity 44 is formed between the housing 41 and the stator 42. An inner cavity 45 is formed between the stator 42 and the rotor 43. The inner circumferential surface of the stator 42 is composed of multiple circumferentially distributed planes connected in sequence. The stator 42 is provided with stepped holes 46 that penetrate its wall thickness and correspond one-to-one with each plane. Hole 46 forms an eccentrically positioned slit on the corresponding plane. The stepped hole 46 is used to connect the inner cavity 45 and the outer cavity 44. The slit extends along the axial direction of the rotor 43. An expansion zone 47 and a contraction zone 48 are formed on both sides of the minimum radial clearance between the outer circumferential surface of the rotor 43 and each plane. The slits are all located within the expansion zone 47. The drive motor is fixedly installed on the top of the oxygen-enriched water storage tank 8 and is connected to the microcontroller signal. The output shaft of the drive motor passes through the oxygen-enriched water storage tank 8 and is fixedly connected to the rotor 43 to drive the rotor 43 to rotate. Pure water and oxygen entering the shell 41 form oxygen-enriched water under the rotation of the rotor 43 and flow out through the outlet 412.

[0039] The intelligent control module 5 controls the water purification module 2, oxygen generation module 3, and drive motor according to received instructions, and performs closed-loop feedback control of the oxygen generation module 3 and drive motor based on the dissolved oxygen concentration of the oxygen-enriched water. The intelligent control module 5 includes a control panel, a microcontroller (MCU), and a dissolved oxygen (DO) sensor. The control panel is fixedly installed on the top of the housing 1 and can be a touchscreen for inputting and outputting information. The dissolved oxygen sensor 13 is installed inside the oxygen-enriched water storage tank 8 to detect the dissolved oxygen concentration of the oxygen-enriched water in the tank and transmits the detected DO concentration value (unit: mg / L) to the MCU in real time. The dissolved oxygen sensor 13 can be an optical (fluorescence quenching method) sensor, which is ideal for long-term stable operation in a closed system due to its advantages such as fast response, maintenance-free operation, insensitivity to flow rate, and no oxygen consumption. The microcontroller is installed in the upper part of the housing 1 and is connected to the dissolved oxygen sensor 13, control panel, water pump 12, inlet solenoid valve 6 float-type level sensor, and drive motor. The microcontroller uses hysteresis comparison logic to avoid frequent start-stop cycles near the target concentration point.

[0040] The pure water storage tank 7 is used to store pure water purified by the water purification module 2. The pure water storage tank 7 is equipped with a water pump 12 for pumping pure water to the oxygen-enriched water storage tank 8 and a float-type liquid level sensor for controlling the start and stop of the water purification module 2. Both the water pump 12 and the float-type liquid level sensor are connected to the microcontroller of the intelligent control module 5. Water in the pure water storage tank 7 is drawn by the water pump 12 and sent to the micro / nano oxygen dissolution module 4, where it mixes with high-purity oxygen to generate micro / nano bubbles, which are then injected into the oxygen-enriched water storage tank 8.

[0041] The oxygen-enriched water storage tank 8 is used to store oxygen-enriched water prepared by the micro-nano oxygen dissolution module 4; both the pure water storage tank 7 and the oxygen-enriched water storage tank 8 are sealed storage tanks made of food-grade stainless steel or PP material. The oxygen-enriched water storage tank 8 has good sealing properties to slow down the natural dissipation of oxygen.

[0042] The working principle of the aforementioned micro / nano oxygen dissolution module 4 is as follows: The micro / nano oxygen dissolution module 4 is placed inside the oxygen-rich water storage tank 8. The rotor 43 is connected to the output shaft of the drive motor via a coupling. When the drive motor is started, it drives the rotor 43 to rotate counterclockwise around its axis. Figure 4 As shown in the structure, oxygen is introduced into the shell 41 through the inlet 411, and the stator 42 is provided with a stepped hole 46. The outer cavity 44 is connected to the inner cavity 45 through the stepped hole 46. The slit is located in the expansion region 47 of the inner cavity 45. Due to the frictional cavitation phenomenon, the pressure in the expansion region 47 drops sharply, forming a low-pressure region. The low-pressure region forces oxygen to flow from the outer cavity 44 into the inner cavity 45 through the stepped hole 46 with the slit, thus realizing the air intake function. At the same time, frictional cavitation occurs in the expansion region 47 of the inner cavity 45, that is, the pressure in the expansion region 47 is lower than the saturated vapor pressure of the gas dissolved in water, causing the gas to precipitate from the water and form micro-nano bubbles. The water containing micro-nano bubbles is in the contraction region 48 of the inner cavity 45. Due to the frictional cavitation phenomenon, high pressure is generated. The high pressure squeezes the water containing micro-nano bubbles to flow out through the outlet 412, thus realizing the transportation of water containing micro-nano bubbles. In this embodiment, the pressure swing adsorption oxygen generation module 3 is connected to the micro-nano oxygen dissolution module 4. The user inputs a command through the control panel, the solenoid valve opens, the water pump 12 operates, the drive motor starts working, and the rotor 43 rotates. At the same time, a frictional cavitation phenomenon is generated, and the pressure in the expansion zone 47 of the inner cavity 45 drops sharply, thereby drawing in oxygen and mixing it with water. Since the pressure in the expansion zone 47 is lower than the saturated vapor pressure of oxygen, oxygen micro-nano bubbles are released, generating oxygen-enriched water. The high pressure generated by the frictional jet phenomenon transports the oxygen-enriched water from the outlet 412 to the oxygen-enriched water storage tank 8.

[0043] The aforementioned micro / nano oxygen dissolving module 4 employs a different oxygen dissolving principle than existing oxygen-enriched water generating devices. Specifically, an eccentric slit is set on the plane of the inner surface of the stator 42, located within the expansion zone 47 formed by the outer circumferential surface of the rotor 43 and the plane. The "negative pressure" or vacuum generated by the frictional cavitation phenomenon within the expansion zone 47 draws the mixture of oxygen and pure water generated by the pressure swing adsorption oxygen generating module 3 into the inner cavity 45, generating micro / nano bubbles. The oxygen-enriched water containing these micro / nano bubbles is then discharged through the high pressure generated by the frictional jet. This eliminates the need for components such as blades and filters that cut through air and water, as is present in existing technologies. Therefore, the oxygen-enriched water preparation device of this embodiment has… The micro-nano bubble dissolving section features a simple structure, low manufacturing cost, and generation effect unaffected by water pressure. Within the internal structure of the nano-bubble dissolving section, there is a gap between the rotor 43 and the stator 42. During operation, the stator 42 and rotor 43 remain in a non-contact state, generating a large number of bubbles with extremely low energy consumption. This results in a water dispenser with low energy consumption, low friction loss, low vibration, low noise, high reliability, and long service life. The size and speed of the micro-nano bubbles generated by the micro-nano oxygen dissolving module 4 can be adjusted by the rotational speed of the rotor 43 and the relative positional relationship between the rotor 43 and the stator 42, ensuring that the device meets the user's needs.

[0044] The aforementioned oxygen-enriched water preparation device also includes a temperature regulating device 10 installed inside the housing 1, as well as sound insulation material and shock-absorbing feet located at the bottom of the housing 1; the temperature regulating device 10 can be an instant heating module and a semiconductor cooling module; the temperature regulating device 10 is installed in the outlet 412 pipeline of the oxygen-enriched water storage tank 8; an outlet solenoid valve 11 is installed in the outlet 412 pipeline; the intelligent control module 5 is used to control the temperature regulating device 10 and the outlet solenoid valve 11.

[0045] The temperature regulation and water output of the above-mentioned oxygen-enriched water preparation device are adjusted according to the user's selection on the control panel. The water in the oxygen-enriched water storage tank 8 flows through the pipeline to the built-in instant heating module or semiconductor cooling module, and finally flows out through three independent water outlets controlled by solenoid valves: room temperature, hot water, and ice water.

[0046] Example 2 This embodiment provides a control method for the above-mentioned oxygen-enriched water preparation device, which includes the following steps: Users can set the target value and start threshold of dissolved oxygen concentration in oxygen-enriched water through the touch screen interface. For example, the target value can be 20 mg / L, 25 mg / L or 30 mg / L. When the target value is 20 mg / L, the start threshold can be 19 mg / L. This setting value is stored by the MCU.

[0047] The actual dissolved oxygen concentration of the oxygen-enriched water in the oxygen-enriched water storage tank 8 is monitored in real time; the MCU reads the real-time measurement value of the dissolved oxygen sensor 13 at a set frequency (e.g., once per second).

[0048] The system compares the actual dissolved oxygen concentration with the set target value. When the actual dissolved oxygen concentration is lower than the preset target value and lower than the start-up threshold, the system starts the water purification module 2, oxygen generation module 3, and drive motor to begin preparing oxygen-enriched water. When the actual dissolved oxygen concentration reaches or exceeds the preset target value, the system stops the water purification module 2, oxygen generation module 3, and drive motor, and enters standby monitoring mode.

[0049] The MCU internally runs a control algorithm based on hysteresis comparison. Hysteresis comparison is used to prevent the system from frequently starting and stopping near the target value, improving equipment lifespan and operational stability. The algorithm logic is as follows: The MCU issues a "start" command, connecting the power supply to the oxygen generator module 3. The air compressor 9 starts working, filling the oxygen buffer tank with high-purity oxygen. Simultaneously, the MCU starts the drive motor, water pump 12, and solenoid valve, beginning to inject oxygen-enriched water into the oxygen-enriched water storage tank 8. The system enters the "oxygen generation" working state until the stop condition is met. The stop condition is: the MCU issues a "stop" command, disconnecting the power supply to the oxygen generator module 3 and the drive motor. The system enters a "standby monitoring" state. In this state, core energy-consuming components stop working, and only the MCU and DO sensor maintain low-power operation, continuously monitoring the natural decay of dissolved oxygen concentration. The hysteresis threshold is a preset difference, for example, 1 mg / L. This means that when the target value is 20 mg / L, the system will only restart when the dissolved oxygen concentration drops below 19 mg / L, and stop when it reaches or exceeds 20 mg / L.

[0050] Through closed-loop control logic, this embodiment not only allows for the simple addition of oxygen to water, but also achieves "precise management" of dissolved oxygen concentration. It creates and maintains a stable and controllable supersaturation state. The metastable nature of micro- and nano-bubbles allows them to exist in water for extended periods without escaping, providing a physical basis for achieving dissolved oxygen levels far exceeding conventional saturation. The intelligent control module 5 acts like a "trainer," precisely controlling this process to ensure that the dissolved oxygen concentration is stably maintained at the high level set by the user, transforming an unstable physical phenomenon into a reliable and quantifiable product attribute.

[0051] This fundamentally improves the quality and user experience of oxygen-enriched water, transforming it from a vaguely defined "healthy water" into a functional beverage with clear and verifiable indicators.

[0052] Obviously, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope of the invention. Therefore, if these modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention also intends to include these modifications and variations.

[0053] In summary, the above are merely preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A highly efficient apparatus for preparing oxygen-enriched water, characterized in that, It includes a housing, a water purification module, an oxygen generation module, an oxygen-enriched water storage tank, a micro-nano oxygen dissolution module, a drive motor, and an intelligent control module; The water purification module, the oxygen generation module, the oxygen-enriched water storage tank, and the drive motor are installed inside the housing; The water purification module is used to purify tap water to provide pure water to the oxygen-enriched water storage tank; The oxygen generation module is used to generate oxygen with a purity greater than 90% from air and deliver the generated oxygen to the micro-nano oxygen dissolution module. The micro-nano oxygen dissolution module is installed in the oxygen-enriched water storage tank and is driven by the drive motor to dissolve the oxygen produced by the oxygen generation module in the pure water provided by the water purification module to generate oxygen-enriched water. The intelligent control module is used to control the water purification module, the oxygen generation module, and the drive motor according to the received instructions, and to perform closed-loop feedback control of the oxygen generation module and the drive motor according to the dissolved oxygen concentration of the oxygen-enriched water.

2. The oxygen-enriched water preparation apparatus as described in claim 1, characterized in that, It also includes a pure water storage tank; The water purification module, the pure water storage tank, and the oxygen-enriched water storage tank are all installed in the middle of the casing. The pure water storage tank is used to store pure water purified by the water purification module; the pure water storage tank is equipped with a water pump for pumping pure water to the oxygen-enriched water storage tank and a float-type liquid level sensor for controlling the start and stop of the water purification module. Both the water pump and the float-type liquid level sensor are connected to the intelligent control module. Both the pure water storage tank and the oxygen-enriched water storage tank are sealed water tanks made of food-grade stainless steel or PP material.

3. The oxygen-enriched water preparation apparatus as described in claim 2, characterized in that, The water inlet of the water purification module is connected to the tap water pipe through an inlet solenoid valve, and the water outlet is connected to the pure water storage tank. The water purification module includes a PP cotton filter element, a granular activated carbon filter element, a reverse osmosis membrane filter element, and an activated carbon filter element arranged in sequence.

4. The oxygen-enriched water preparation apparatus as described in claim 3, characterized in that, The intelligent control module includes a control panel, a microcontroller, and a dissolved oxygen sensor; The control panel is fixedly installed on the top of the casing; The dissolved oxygen sensor is installed inside the oxygen-enriched water storage tank and is used to detect the dissolved oxygen concentration of the oxygen-enriched water in the tank. The microcontroller is installed in the upper part of the housing and is connected to the dissolved oxygen sensor, the control panel, the water pump, the water inlet solenoid valve, the float-type liquid level sensor, and the drive motor.

5. The oxygen-enriched water preparation apparatus as described in claim 4, characterized in that, The dissolved oxygen sensor is an optical sensor; The microcontroller employs hysteresis comparison logic to avoid frequent start-stop cycles near the target concentration point.

6. The oxygen-enriched water preparation apparatus as described in claim 4, characterized in that, The micro-nano oxygen dissolution module includes a housing, a stator, and a rotor arranged coaxially from the outside to the inside. The housing is provided with an outlet and an inlet connected to the oxygen generating module via a pipeline; The rotor is rotatably mounted on the housing; the stator is fixedly mounted inside the housing; an outer cavity is formed between the housing and the stator; an inner cavity is formed between the stator and the rotor; The inner circumferential surface of the stator is formed by a plurality of circumferentially distributed planes connected in sequence; the stator is provided with stepped holes that penetrate its wall thickness and correspond one-to-one with each plane; the stepped holes form eccentrically arranged slits on the corresponding planes for connecting the inner cavity and the outer cavity; the slits extend along the axial direction of the rotor; an expansion zone and a contraction zone are formed on both sides of the minimum radial clearance between the outer circumferential surface of the rotor and each plane; the slits are all located within the expansion zone; The drive motor is fixedly installed on the top of the oxygen-enriched water storage tank and is connected to the microcontroller via signal; the output shaft of the drive motor passes through the oxygen-enriched water storage tank and is fixedly connected to the rotor to drive the rotor to rotate. Pure water and oxygen entering the housing are combined under the rotation of the rotor to form oxygen-enriched water, which then flows out through the outlet.

7. The oxygen-enriched water preparation apparatus as described in claim 4, characterized in that, It also includes an air compressor; both the oxygen generating module and the air compressor are installed at the bottom of the housing; the air compressor is signal-connected to the microcontroller and is used to filter, pressurize, and send ambient air into the oxygen generating module.

8. The oxygen-enriched water preparation apparatus as described in claim 4, characterized in that, The oxygen generation module is a pressure swing adsorption oxygen generation module, which includes adsorption tower A and adsorption tower B filled with zeolite molecular sieves, an oxygen buffer tank, and a set of solenoid valve arrays controlled by the microcontroller.

9. The oxygen-enriched water preparation apparatus according to any one of claims 1-8, characterized in that, It also includes a temperature regulating device installed inside the housing, and sound insulation material and shock-absorbing feet set at the bottom of the housing; the temperature regulating device is installed in the outlet pipe of the oxygen-enriched water storage tank; A water outlet solenoid valve is installed in the outlet pipeline; the intelligent control module is used to control the temperature regulating device and the water outlet solenoid valve.

10. A control method for an oxygen-enriched water preparation apparatus as described in any one of claims 1-9, characterized in that, Includes the following steps: Set the target value and activation threshold for dissolved oxygen concentration in oxygen-enriched water; Real-time monitoring of the actual dissolved oxygen concentration in the oxygen-enriched water storage tank. Compare the actual dissolved oxygen concentration with the set target value for dissolved oxygen concentration; When the actual dissolved oxygen concentration is lower than the preset target value and lower than the start-up threshold, the water purification module, oxygen generation module and drive motor are started to produce oxygen-enriched water. When the actual dissolved oxygen concentration reaches or exceeds the preset target value, the water purification module, oxygen generation module, and drive motor are stopped, and the system enters standby monitoring mode.

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