A micro-nano bubble household water purification system and method

Abstract

The present invention relates to a micro-nano bubble household water purification system and method. The system comprises: a water purification module, comprising 1 to N levels of water purification units connected in series, wherein the water inlet No. 1 of the first level water purification unit is connected to the tap, and a water quality sensor is provided at the water outlet of each level of water purification unit; a micro-nano bubble generator, comprising a vortex assembly and a micro-nano bubble generating assembly, the vortex assembly comprising a water pump and a vortex device; the water inlet of the water pump is connected to the water outlet of the Nth level water purification unit, the water outlet of the water pump is connected to the water inlet of the vortex device, and the water outlet of the vortex device is connected to the injection port of the micro-nano bubble generating assembly; each level of water purification unit is also provided with another water inlet; and a controller, which is respectively connected to water quality sensors No. 1 to No. N+1. By flexibly configuring multiple stages of treatment units, the system effectively removes impurities, particulates, turbidity, color, and other pollutants from raw water.

Description

Technical Field

[0001] The present invention relates to a micro-nano bubble household water purification system and method, belonging to the technical field of household water purification. Background Art

[0002] As people's living standards improve, drinking water safety is receiving increasing attention. Raw water from drinking water sources undergoes physical, chemical, and biological treatment at waterworks to meet the "Standard for Drinking Water Quality" (GB5749-2022). This water is then delivered to thousands of households via water distribution networks. However, due to long transportation distances and aging and damage to the networks, colloids, rust, and impurities can be contaminated during delivery, breeding pathogens and organic pollutants. The resulting tap water, upon reaching consumers' homes, contains numerous pollutants, posing a serious threat to human health. Current methods for purifying tap water primarily rely on household water purifiers, pre-intake filtration and purification devices, and community water purification stations. However, these methods cannot completely remove pollutants. For example, household water purifiers typically use activated carbon as a filter medium, but this is only effective for removing organic compounds with a molecular weight between 500 and 3000 and is largely ineffective for compounds outside this range. Therefore, there is an urgent need to develop more efficient and safe household water purification technologies. Summary of the Invention

[0003] In response to the above technical problems, the present invention provides a micro-nano bubble household water purification system and method. The system effectively removes impurities, particles, turbidity, color and other pollutants in the raw water by flexibly setting up multi-stage treatment units. Then, the micro-nano bubbles collapse and the hydroxyl free radicals generated are used to further remove microorganisms and organic micropollutants in the raw water, effectively ensuring water quality safety.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A micro-nano bubble household water purification system, comprising:

[0006] The water purification module includes 1 to N water purification units connected in series. The water inlet No. 1 of the first water purification unit is connected to the tap. A water quality sensor, namely, water quality sensors No. 1 to N, is provided at the water outlet of each water purification unit.

[0007] The micro-nano bubble generator includes a vortex component and a micro-nano bubble generating component. The vortex component includes a water pump and a vortex device. The water inlet of the water pump is connected to the water outlet of the N-stage water purification unit, the water outlet of the water pump is connected to the water inlet of the vortex device, and the water outlet of the vortex device is connected to the injection port of the micro-nano bubble generating component. The vortex device is also provided with an air suction pipeline.

[0008] Each level of water purification unit is also provided with another water inlet, namely the first to N-th water inlets, and the N+1-th water outlet is provided on the micro-nano bubble generating component, and the N+1-th water outlet is provided with the N+1-th water quality sensor, and the N+1-th water outlet is used to output drinking water that meets the standards;

[0009] The controller is connected to water quality sensors No. 1 to No. N+1 respectively.

[0010] In the micro-nano bubble household water purification system, preferably, the micro-nano bubble generating component includes a micro-nano mixing chamber, which is provided with an exhaust valve and a pressure gauge, and the injection port is provided in the micro-nano mixing chamber.

[0011] The micro-nano bubble household water purification system is preferably provided with at least one injection head at the injection port, and a plurality of micron-sized small holes are arranged on the injection head.

[0012] In the micro-nano bubble household water purification system, preferably, the number of injection heads is determined by the following formula:

[0013] n=k·V=k·Q·t

[0014] Where n is the number of injection heads; k is the proportional coefficient; V is the volume of the micro-nano mixing chamber; Q is the processing flow rate; and t is the system operating time.

[0015] The micro-nano bubble household water purification system preferably has an N-stage water purification unit life improvement percentage θ n %for:

[0016]

[0017] Where a 1n is the limit value of water quality index N; a 3n The No. N water quality sensor detects the N value of the water quality index in the water discharged from the N-level water purification unit.

[0018] In the micro-nano bubble household water purification system, preferably, the pipeline connecting the water inlet of the water pump and the water outlet of the N-stage water purification unit is the micro-nano bubble generator water inlet pipeline, and the micro-nano bubble generator water inlet pipeline is provided with a valve and a water inlet flow meter.

[0019] The micro-nano bubble household water purification system is preferably provided with a rotor flowmeter and a check valve on the air intake pipe.

[0020] A second aspect of the present invention provides a method for using the micro-nano bubble household water purification system, comprising the following steps:

[0021] Tap water enters the first-level water purification unit from the No. 1 water inlet. The filtered water is sent to the second-level water purification unit after being monitored by the No. 1 water quality sensor. Similarly, the water enters the micro-nano bubble generator after being purified by the Nth-level water purification unit to produce micro-nano bubble water. After the No. N+1 water quality sensor monitors that it is qualified, the No. N+1 water outlet outputs drinking water that meets the standards.

[0022] A third aspect of the present invention provides a cleaning method for the above-mentioned micro-nano bubble household water purification system, wherein a valve is provided at each of the first to Nth water inlets, namely valves 1 to N, and valve N+1 is provided at the N+1 water outlet. Valves 1 to N are connected one-to-one with water quality sensors of water purification units of levels 1 to N, respectively. Valve N+1 is connected to water quality sensor N+1, and a controller is used to control the opening and closing of the valves. The water quality sensor of each water purification unit monitors the water quality index of the unit respectively, and water quality sensor N+1 simultaneously monitors the total water quality index of water purification units of levels 1 to N.

[0023] The steps include:

[0024] When the water quality monitored by the No. N water quality sensor exceeds the standard and other water quality indicators are normal, the No. N water quality sensor transmits a signal to the controller, and the controller controls valves 1 to N to open and other valves to close. The micro-nano bubble water in the micro-nano bubble generator first enters the 1 to N level water purification units through the first to Nth water inlets. After passing through the N level water purification units, the micro-nano bubble water enters the micro-nano bubble generator again through the inlet of the micro-nano bubble generator, and new micro-nano bubble water is prepared and flows out through the No. N+1 water outlet for direct drinking by users.

[0025] The present invention has the following advantages due to the adoption of the above technical solution:

[0026] 1. The present invention can flexibly connect the micro-nano bubble generator and the multi-stage treatment unit of the water purifier by opening and closing the valve according to the water quality characteristics of the tap water. By flexibly setting up the multi-stage treatment unit, impurities, particulates, turbidity, color, and other pollutants in the raw water are effectively removed. Then, the collapse of the micro-nano bubbles and the hydroxyl free radicals generated further remove microorganisms and organic micropollutants in the raw water, effectively ensuring water quality safety. The synergistic removal of pollutants in drinking water by micro-nano bubble technology and physical filtration technology is achieved, improving treatment efficiency and ensuring the quality of direct drinking water.

[0027] 2. The present invention utilizes water quality sensors of different water purification units to monitor the performance degradation of the water purification units in real time. For water purification units with too low performance, the micro-nano bubble generating device is connected to the inefficient water purifier processing unit by opening and closing the intelligent valve. The dual effects of bubble collapse impact and OH oxidation in micro-nano bubble water are utilized to achieve directional cleaning of the inefficient filter element, extend the service life of the filter element, and improve the performance of the water purifier processing unit.

[0028] 3. Improve the lifespan and efficiency of the water purification unit. After a period of operation, the water purification unit will become clogged, resulting in a decrease in water purification performance and requiring cleaning. Conventional backwashing often has a significant impact on the filter media, shortening its service life. However, cleaning with micro-nano bubble water utilizes the microjets and shear stress generated by the collapse of the bubbles, as well as the hydroxyl free radicals produced, to effectively clean the filter media and alleviate the impact of the water flow on the filter media, thereby extending its service life.

[0029] 4. The cleaning method is intelligent and unique. When the water quality sensor detects that the water quality index of a water purification unit exceeds the limit specified in the "National Drinking Water Quality Standard" (GB5749-2022), the valve of the water purification unit will automatically open, and the micro-nano bubble water will automatically clean the water purification unit. In addition, while cleaning the target water purification unit, the previous levels of water purification units related to it are also cleaned together to ensure the cleanliness of the water purification unit.

[0030] 5. After the micro-nano bubble water cleans different water purification units, it returns to the micro-nano bubble generator and is used to treat the cleaning water with the generated micro-nano bubbles. After the treated cleaning water meets the various water quality indicators, it can be directly drunk by users, thus realizing the recycling of cleaning water and being green and low-carbon.

[0031] 6. Compared with ordinary drinking water, micro-nano bubble drinking water is sweeter, has a smoother taste when entering the mouth and throat, has lower acidity, less odor, and tastes better. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is an overall schematic diagram of a micro-nano bubble household water purification system provided by one embodiment of the present invention;

[0033] Figure 2 Schematic diagram of a first-stage water purification unit provided in this embodiment of the present invention;

[0034] Figure 3 A schematic diagram of the micro-nano bubble generator provided in this embodiment of the present invention;

[0035] Figure 4 A schematic diagram of a nozzle in the micro-nano bubble generator provided in this embodiment of the present invention;

[0036] Figure 5 A schematic diagram of the working principle of the micro-nano bubble generator provided in this embodiment of the present invention;

[0037] Figure 6 A schematic diagram of a multifunctional water quality sensor provided in this embodiment of the present invention;

[0038] Figure 7 This is a graph showing the taste analysis results of the micro-nano bubble household water purification system and ordinary drinking water provided by this embodiment of the present invention;

[0039] The marks in the figure are as follows:

[0040] 1- Water purification module, 1.1- Water inlet No. 1; 1.2- Valve No. 1; 1.3- Water quality sensor No. 1; 1.4- Latex tube;

[0041] 2- vortex assembly, 2.1- water inlet flowmeter, 2.2- valve, 2.3- rotor flowmeter, 2.4- check valve, 2.5- water pump, 2.6- vortex device;

[0042] 3-micro-nano bubble generating assembly, 3.1-exhaust valve, 3.2-pressure gauge, 3.3-micro-nano mixing chamber, 3.4-injection head;

[0043] 4- water inlet pipe of micro-nano bubble generator, 4.1- inlet of micro-nano bubble generator;

[0044] 5-Suction pipe;

[0045] 6-Micro-nano bubble generator water outlet pipe. DETAILED DESCRIPTION

[0046] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention are described clearly and completely below. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. All other embodiments derived by ordinary persons in this field based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0047] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second", "third", "fourth" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect.

[0048] For ease of description, spatially relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inner side," "outer side," "lower," "upper," etc. Such spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

[0049] Micro-nano bubbles are a type of tiny bubbles with diameters in the micrometer and nanometer ranges. While different scholars define their diameter ranges slightly differently, most are less than 100 μm. Compared to traditional bubbles, micro-nano bubbles boast smaller size, larger specific surface area, longer lifetime, better mass transfer efficiency, higher surface potential, stronger biological activity, and the ability to generate free radicals. The hydroxyl radicals generated in situ within micro-nano bubble water are highly oxidizing and non-selective in removing pollutants, effectively removing various organic pollutants, difficult-to-degrade pollutants, and pathogenic microorganisms from water. Currently, micro-nano bubble technology is primarily used in wastewater treatment and surface cleaning. For example, patent application CN106007022A discloses a device and method for treating wastewater using micro-nano bubbles. By leveraging the properties of micro-nano bubbles, such as their generation of hydroxyl radicals, combined with the treatment of wastewater between different chambers, this device achieves efficient and economical wastewater purification. Patent application CN116103741A discloses a descaling device that electrochemically generates nanoscale bubbles to effectively remove dirt from objects being cleaned. However, there are no reports on the application of micro-nano bubble technology to improve the performance of water purification units in household water purifiers or the quality of drinking water. On the one hand, drinking water has very high requirements for water quality and is sensitive to water quality, and traditional physical and chemical water purification methods may pose certain threats to drinking water quality. On the other hand, compared with other water purification methods that produce ·OH, micro-nano bubbles produce ·OH during their collapse, which is green and clean, without any secondary pollution. Therefore, micro-nano bubble technology is very suitable for drinking water application, providing new ideas for the safe and efficient removal of pollutants in drinking water.

[0050] Based on this, the present invention proposes a micro-nano bubble household water purification system, which connects a micro-nano bubble generating device with the multi-stage treatment unit of the water purifier and uses intelligent valves and water quality sensors to enable the micro-nano bubble generator to automatically improve the performance of the treatment unit of the water purifier and the water quality of the direct drinking water output.

[0051] The technical solution of the present invention is described in detail below with reference to specific examples.

[0052] This system consists of a series-parallel arrangement of water inlet 1.1, water purification units from levels 1 to N, a water quality sensor 1.3, valves, stainless steel pipes (referred to as steel pipes), latex tubing 1.4, and a micro-nano bubble generator. The steel pipe connects the faucet to water inlet 1.1 of the first-level water purification unit. The faucet water enters the first-level water purification unit. The water purification units (levels 1 through N) are connected in series. The faucet water is connected to water inlet 1.1 of the first-level water purification unit via the steel pipe. The outlet of the first-level water purification unit is connected to the inlet of the second-level water purification unit, and then to the outlet of the (N-1)-level water purification unit. The outlet of the N-level water purification unit is also connected to the inlet of the N-level water purification unit via the steel pipe. The outlet of the N-level water purification unit is then connected to the inlet 4.1 of the micro-nano bubble generator. The faucet water passes through the micro-nano bubble generator, generating micro-nano bubble water.

[0053] Each level of water purification unit is also provided with another water inlet, namely the first to N-th water inlets, wherein the first water inlet is connected to the 1-level water purification unit through valve No. 1, the second water inlet is connected to the 2-level water purification unit through valve No. 2... the N-th water inlet is connected to the N-level water purification unit through valve No. N. At the same time, water quality sensors No. 1 / 2 / 3 / 4... / N are respectively provided at the water outlets of the 1 / 2 / 3 / 4... / N-level water purification units, and water quality sensor No. N+1 and valve No. N+1 are provided at the N+1-th water outlet of the micro-nano bubble generator. When different water purification units need to be cleaned, micro-nano bubble water enters the water purification unit from the water inlet of the different water purification units through the latex tube 1.4 to clean them. The water purification flow chart is shown in the attached figure. Figure 1 As shown, the water purification unit is as shown in the attached Figure 2 shown.

[0054] The controller is used to control the opening and closing of the intelligent valve. Water quality sensors No. 1 / 2 / 3 / 4... / N monitor water quality indicators 1 / 2 / 3 / 4... / N respectively, and water quality sensor No. N+1 monitors water quality indicators 1 / 2 / 3 / 4... / N simultaneously. When water quality index 1 exceeds the standard and water quality indexes 2 / 3 / 4… / N are normal, water quality sensor No. 1 1.3 transmits a signal to the controller, which controls valve No. 1 1.2 to open and valves 2 / 3 / 4… / N to close, and the micro-nano bubble water in the micro-nano bubble generator first enters the first-level water purification unit through the first water inlet, and then passes through the 2 / 3 / 4… / N-level water purification units in sequence; when water quality index 2 exceeds the standard and water quality indexes 3 / 4… / N are normal, water quality sensor No. 2 transmits a signal to the controller, which controls valves 1 and 2 to open and valves 3 / 4… / N to close, and the micro-nano bubble water in the micro-nano bubble generator first enters the first-level and second-level water purification units through the first water inlet and the second water inlet, and then passes through the 3 / 4… / N-level water purification units in sequence; when water quality index N-1 exceeds the standard and water quality index N is normal, water quality sensor No. N-1 The sensor transmits a signal to the controller, which controls valves No. 1, No. 2, ..., N-1 to open and valve No. N to close. The micro-nano bubble water in the micro-nano bubble generator first enters the first, second, ..., N-1 water purification units through the first water inlet, the second water inlet, ..., the N-1 water inlet, and then passes through the N-1 water purification unit. When water quality indicator N exceeds the standard, water quality sensor No. N transmits a signal to the controller, which controls valves No. 1, No. 2, ..., N to open. The micro-nano bubble water in the micro-nano bubble generator first enters the first, second, ..., N-1 water purification units through the first water inlet, the second water inlet, ..., the N-1 water inlet. Under any of the above operating conditions, after passing through the N-1 water purification unit, the micro-nano bubble water enters the micro-nano bubble generator through micro-nano bubble generator inlet 4.1, and new micro-nano bubble water is prepared and flows out through water outlet No. N+1 (N+1).1 for direct drinking by the user.When any of the water quality indicators 1 / 2 / 3 / 4... / N of the water purifier's outlet water exceeds the standard, the N+1 water quality sensor (N+1).3 controls the N+1 valve (N+1).2 to close, and the valves 1, 2...N are all opened. The micro-nano bubble water in the micro-nano bubble generator enters the 1st, 2nd...Nth level water purification units through the first water inlet, the second water inlet...the Nth water inlet to clean them, and then enters the micro-nano bubble device through the micro-nano bubble generator inlet 4.1 to prepare new micro-nano bubble water. If all water quality indicators are up to standard as detected by the N+1 water quality sensor, the newly prepared micro-nano bubble water is then The micro-nano bubble water can be drunk directly. If any indicator does not meet the standard, the micro-nano bubble water will be discharged through the water outlet (N+1).1. Subsequently, the water quality sensor No. N+1 transmits a signal to the controller. The controller controls the valve No. N+1 to close, and the valves No. 1, No. 2...N are all opened. The micro-nano bubble water in the micro-nano bubble generator enters the 1st, 2nd...Nth level water purification units through the first water inlet, the second water inlet...the Nth water inlet, and they are cleaned. Finally, they also flow into the micro-nano bubble device to prepare new micro-nano bubble water, until all water quality indicators in the newly prepared micro-nano bubble water meet the standards.

[0055] Further, if Figure 3 As shown, raw water, after being filtered and adsorbed by the aforementioned N-stage water purification unit, enters the micro-nano bubble generator along with air. The micro-nano bubble generator consists of a micro-nano bubble generator water inlet pipe 4, an air intake pipe 5, a water inlet flowmeter 2.1, a rotor flowmeter 2.3, a pressure gauge 3.2, a water pump 2.5, a check valve 2.4, a vortex device 2.6, a nano-mixing chamber 3.3, an automatic exhaust valve 3.1, a spray head 3.4, a micro-nano bubble generator water outlet pipe 6, and a valve 2.2. In the micro-nano bubble generator, the gas-liquid mixture undergoes high-speed rotation in the vortex device 2.6 and is ejected from the spray port 3.4 under appropriate pressure, generating a large number of bubbles in the μm and nm range. The resulting bubble particle size generally ranges from 10 1 ~10 5 nm, and the bubble concentration generated is generally around 10 6 ~10 9 Between 100 and 100 mL.

[0056] The injection port can be provided with multiple injection heads (1 to 4), wherein a single injection head has a diameter of 10 cm and has 43 small holes with a diameter of 1 micron, as shown in the attached Figure 4As shown. The number of jet heads directly affects the number and stability of the generated micro-nano bubbles. The more the number of jet heads, correspondingly, the more the number of the generated micro-nano bubbles and the more stable the performance; on the contrary, the fewer the number of jet heads, the fewer the number of the generated micro-nano bubbles and the more unstable the performance. In the case of a large water treatment flow rate, a large number of stable micro-nano bubbles need to be generated; in the case of a small water treatment flow rate, the requirements for the number and stability of micro-nano bubbles can be reduced. The number n of jet heads is related to the volume V of the nano mixing chamber and is in a direct proportion relationship with V. Let the proportionality coefficient be k (0 < k < 1). The volume V of the nano mixing chamber is related to the treatment flow rate Q. The treatment flow rate Q is directly related to the size of the micro-nano bubble household water purifier. Let the system operation time be t, then there is the following relational expression:

[0057] V = Q·t

[0058] n = k·V = k·Q·t

[0059] In the formula: n takes the largest integer not greater than this value.

[0060] The number of the generated micro-nano bubbles is in direct proportion to the number of jet heads. The more the number of jet heads, the larger the treated water volume. Correspondingly, the more the number of the generated micro-nano bubbles. The generated micro-nano bubbles rapidly break in the water purification unit, generating a large number of strongly oxidizing hydroxyl radicals. The concentration of the generated hydroxyl radicals is generally in the range of 10 -2 ~10 2 nM order of magnitude, effectively degrading the pollutants in the target water purification unit and the pollutants remaining after the treatment by the water purification unit (mainly organic substances and microorganisms), so as to achieve the purpose of purifying water quality and improving the taste of drinking water.

[0061] There are two theories about the mechanism by which micro-nanobubbles generate hydroxyl radicals. One is that the high concentration of ions (OH-) and the accumulated chemical energy at the gas-liquid interface of the micro-nanobubbles play a key role in generating hydroxyl radicals during their collapse. The other is that the high temperature and high pressure generated when the micro-nanobubbles shrink and collapse lead to the generation of hydroxyl radicals. Under such high temperature and high pressure, the water vapor and non-condensable gases (including air) within the bubbles decompose to produce hydroxyl radicals. In terms of removing organic matter, hydroxyl radicals break down the chemical bonds of organic matter, ultimately breaking them down into carbon dioxide and water. In terms of removing microorganisms, micro-nano bubbles can kill microorganisms through physical, chemical and thermal effects. ⅰ. Physical effect: during the collapse process, micro-nano bubbles will induce the surrounding liquid to produce microjets, shock waves and shear stress, and release a large amount of energy to destroy the cell membrane / cell wall of microorganisms; ⅱ. Chemical effect: on the one hand, hydroxyl free radicals can degrade organic matter in the water body, reduce the food source of microorganisms, and thus inhibit the metabolism and activity of microorganisms; on the other hand, hydroxyl free radicals can directly kill microorganisms in the water and reduce the total amount of microorganisms; ⅲ. Thermal effect: the local high temperature generated in the surrounding liquid when micro-nano bubbles collapse will promote the thermal inactivation of microorganisms. Therefore, micro-nano bubble technology can effectively ensure the safety of direct drinking water. The mechanism of micro-nano bubble degradation of organic matter and sterilization and disinfection is shown in the attached figure. Figure 5 shown.

[0062] The water quality sensor in the device issues an alarm for the water quality indicator it monitors based on the range of values ​​set in the "Sanitary Standard for Drinking Water" (GB5749-2022). The water flowing out of different water purification units flows through the corresponding water quality sensors. When the water quality sensor detects that the concentration of the corresponding water quality indicator has increased and exceeds the limit value of the same water quality indicator in the "Sanitary Standard for Drinking Water" (GB5749-2022), the No. 1 water quality sensor 1.3 will issue an alarm, and the controller will automatically open the valve of the corresponding water purification unit, and the water purification unit will be cleaned by micro-nano bubble water. According to the provisions of the "Sanitary Standard for Drinking Water" (GB5749-2022), the limit value of water quality indicator N is set to a 1n When the water quality sensor N detects that the concentration of the water quality index exceeds its limit, it is a 2n , then the No. N water quality sensor sounds an alarm, the controller controls the No. 1, No. 2... No. N valves to open, and the micro-nano bubble water in the micro-nano bubble generator enters the 1st, 2nd... Nth level water purification units through the first water inlet, the second water inlet... the Nth water inlet to clean them. After the cleaning is completed, the No. N water quality sensor detects that the water quality index N value of the water outflow from the Nth level water purification unit is reduced to a 3n , then the life of the Nth-level water purification unit is increased, and the increase percentage is stipulated as:

[0063]

[0064] For the first-level water purification unit, the lifespan improvement percentage is θ1%, for the second-level water purification unit, the lifespan improvement percentage is θ2%, ..., for the Nth-level water purification unit, the lifespan improvement percentage is θ N %, then the total life of the N-level water purification unit is increased to:

[0065] θ%=θ1%·θ2%·...·θ N %

[0066] The above contents of the present invention are further described in detail below through examples.

[0067] Example 1

[0068] This embodiment features a five-stage water purification system. The first-stage filter element utilizes PP cotton, which comes in various sizes, such as 1 micron, 5 micron, and 10 micron, depending on its pore size. In this invention, the first-stage filter element utilizes a 5-micron PP cotton filter element; the second-stage filter element utilizes activated carbon; the third-stage filter element utilizes a 1-micron PP cotton filter element; the fourth-stage filter element utilizes a 0.01-micron filter membrane; and the fifth-stage filter element utilizes activated carbon. Therefore, the system consists of a water inlet line, a first-stage PP cotton filter element, a second-stage pre-activated carbon filter element, a third-stage PP cotton filter element, a 0.01-micron filter element, a fifth-stage post-activated carbon filter element, and a micro-nano bubble generator.

[0069] Raw water flows from the inlet pipe through the first stage of PP cotton, effectively removing suspended solids, rust, and silt with a particle size greater than 1 micron, and partially removing color, turbidity, odor, and organic matter. The second stage of pre-activated carbon effectively removes rust, silt, color, turbidity, odor, organic matter, and residual chlorine from the raw water. While removing pollutants, the activated carbon also effectively protects the subsequent 0.01-micron filter element, extending the life of the membrane filter. The third stage of PP cotton performs the same function as the first stage, providing a safeguard for the first stage. The 0.01-micron filter element effectively removes rust, silt, color, turbidity, odor, organic matter, bacteria, and viruses from the raw water. The fifth stage of post-activated carbon performs the same function as the second stage, providing a safeguard for the second stage. It also adjusts the pH of the drinking water and improves its taste.

[0070] After filtration and adsorption treatment by the filter element, the raw water and air enter the micro-nano bubble generator together. Rotor flowmeter 2.3 and inlet flowmeter 2.1 display the air and raw water flow rates, respectively. The opening and closing of valve 2.2 controls the inlet water flow rate. A check valve 2.4 prevents gas backflow due to excessive pressure in nano-mixing chamber 3.3. A water pump 2.5 delivers the raw water to nano-mixing chamber 3.3. A pressure gauge 3.2 displays the pressure within the nano-mixing chamber. An automatic exhaust valve 3.1 prevents excessive pressure within nano-mixing chamber 3.3. In the micro-nano bubble generator, the gas-liquid mixture undergoes high-speed rotation in vortex device 2.6 and is ejected from nozzle 3.4 at an appropriate pressure, generating a large number of micron and nanometer-sized bubbles. The collapse of the micro-nano bubbles produces hydroxyl radicals, which further degrade organic matter, bacteria, and viruses in the water, ensuring drinking water safety.

[0071] In this embodiment, taking a family of five as an example, the water purifier outlet flow rate is set to 2.5L / min, and the system runs 24 hours a day. The volume of the nano-mixing chamber is:

[0072] V=Q·t=2.5×60×24×10 -3 =3.6(m 3 )

[0073] The proportional coefficient k is 0.2, and the number of injection heads is:

[0074] n=k·V=k·Q·t=0.2×2.5×60×24×10 -3 =0.72 (pieces)

[0075] n is 1, so one nozzle is set.

[0076] Table 1: Working principles of different sensors

[0077]

[0078]

[0079] In this invention, the first stage of the PP cotton filter is equipped with a total dissolved solids (TDS) sensor; the second stage of the pre-activated carbon filter is equipped with a turbidity / color sensor; the third stage of the PP cotton filter functions similarly to the first stage, with a total hardness sensor; the 0.01-micron filter element is equipped with a total bacterial count sensor; the fifth stage of the post-activated carbon filter is equipped with a free chlorine sensor and also monitors the water pH; and a multifunctional water quality sensor is installed at the outlet of the micro-nano bubble device to monitor all of the above water quality indicators. Their operating principles are shown in Table 1.

[0080] In this embodiment, when the total dissolved solids in the PP cotton first-level water outlet exceeds the limit of 1000 mg / L specified in the "Healthy Standard for Drinking Water" (GB5749-2022), the TDS sensor automatically opens valve No. 1 through the controller, and the micro-nano bubble water first enters the PP cotton first level from the first water inlet through the latex tube, cleans it, and then flows through the pre-activated carbon second level, PP cotton third level, 0.01 micron filter element, and post-activated carbon fifth level in sequence, and finally returns to the micro-nano bubble device to prepare new micro-nano bubble water. The newly prepared micro-nano bubble water is tested for all water quality indicators by the multi-functional water quality sensor. If the water quality indicators are all up to standard, the newly prepared micro-nano bubble water can be directly supplied to users for drinking. If any water quality indicator does not meet the standard, the micro-nano bubble water is discharged through the water outlet. After cleaning is completed, if the TDS sensor detects that the TDS content has dropped to 100 mg / L, the life of the PP cotton first level is increased to:

[0081]

[0082] In this embodiment, when the turbidity of the outlet water from the pre-activated carbon secondary stage exceeds the limit of 1 NTU specified in the "Sanitary Standard for Drinking Water" (GB5749-2022), or the chromaticity exceeds the limit of 15 degrees specified in the "Sanitary Standard for Drinking Water" (GB5749-2022), the turbidity / chromaticity sensor transmits a signal to the controller, which controls valves 1 and 2 to automatically open. The micro-nano bubble water first enters the PP cotton primary stage and the pre-activated carbon secondary stage from the first water inlet and the second water inlet for cleaning, then flows through the PP cotton third stage, the 0.01 micron filter element, and the post-activated carbon fifth stage in sequence, and finally returns to the micro-nano bubble device to prepare new micro-nano bubble water. The newly prepared micro-nano bubble water is tested for all water quality indicators by the multi-functional water quality sensor. If all water quality indicators meet the standards, the newly prepared micro-nano bubble water can be directly supplied to the user for drinking. If any water quality indicator does not meet the standards, the micro-nano bubble water is discharged through the water outlet. After cleaning, if the turbidity detected by the turbidity sensor drops to 0.2 NTU and the chromaticity detected by the colorimetry sensor drops to 3 degrees, the secondary life of the activated carbon is increased to:

[0083]

[0084] In this embodiment, when the total hardness of the PP cotton three-level water exceeds the limit of 450mg / L specified in the "Healthy Standard for Drinking Water" (GB5749-2022), the total hardness sensor controls valves 1, 2, and 3 through the controller to automatically open, and the micro-nano bubble water first enters the PP cotton first level, pre-activated carbon second level, and PP cotton third level from the first water inlet, the second water inlet, and the third water inlet for cleaning, and then flows through the 0.01 micron filter element and the post-activated carbon fifth level in sequence, and finally returns to the micro-nano bubble device to prepare new micro-nano bubble water. The newly prepared micro-nano bubble water is tested for all water quality indicators by the multi-functional water quality sensor. If the water quality indicators are all up to standard, the newly prepared micro-nano bubble water can be directly supplied to the user for drinking. If any water quality indicator does not meet the standard, the micro-nano bubble water is discharged through the water outlet. After cleaning is completed, if the total hardness sensor detects that the total hardness drops to 50mg / L, the life of the PP cotton three-level is increased to:

[0085]

[0086] In this embodiment, when the total colony count in the water outlet of the 0.01 micron filter exceeds the limit of 100 CFU / mL specified in the "Standard for Drinking Water Quality" (GB5749-2022), the total colony count sensor controls valves 1, 2, 3, and 4 to automatically open, and the micro-nano bubble water first enters the PP cotton level 1, pre-activated carbon level 2, PP cotton level 3, and 0.01 micron filter from the first water inlet, the second water inlet, the third water inlet, and the fourth water inlet to clean it, then flows through the post-activated carbon level 5, and finally returns to the micro-nano bubble device to prepare new micro-nano bubble water. The newly prepared micro-nano bubble water is tested for all water quality indicators by the multi-functional water quality sensor. If the water quality indicators are all up to standard, the newly prepared micro-nano bubble water can be directly supplied to the user for drinking. If any water quality indicator does not meet the standard, the micro-nano bubble water is discharged through the water outlet. After cleaning is completed, if the total colony count sensor detects that the total colony count drops to 25 CFU / mL, the life of the 0.01 micron filter is increased to:

[0087]

[0088] In this embodiment, when the free chlorine content in the post-activated carbon five-stage outlet water exceeds the limit of 2 mg / L specified in the "Healthy Standard for Drinking Water" (GB5749-2022), the free chlorine sensor controls valves 1, 2, 3, 4, and 5 to automatically open, and the micro-nano bubble water first enters the PP cotton first stage, pre-activated carbon second stage, PP cotton third stage, 0.01 micron filter element, and post-activated carbon five stage from the first water inlet, the second water inlet, the third water inlet, the fourth water inlet, and the fifth water inlet, and is cleaned, and then returns to the micro-nano bubble device to prepare new micro-nano bubble water. The newly prepared micro-nano bubble water is tested for all water quality indicators by the multi-functional water quality sensor. If the water quality indicators are all up to standard, the newly prepared micro-nano bubble water can be directly supplied to users for drinking. If any water quality indicator does not meet the standard, the micro-nano bubble water is discharged through the water outlet. After cleaning, if the free chlorine content detected by the post-activated carbon five-stage sensor drops to 0.4 mg / L, the service life of the post-activated carbon five-stage sensor is increased to:

[0089]

[0090] In this embodiment, the total life of the five-stage water purification unit is increased to:

[0091] θ%=θ1%·θ2%·θ3%·θ4%·θ5%=90%×64%×88.9%×75%×80%=30.7%

[0092] In this embodiment, a multifunctional water quality sensor is set at the outlet of the micro-nano bubble device, which can simultaneously monitor the water quality indicators of total dissolved solids, turbidity / color, total hardness, total bacterial count, free chlorine and pH. The sensor is mainly composed of a measuring probe and a main measurement and control circuit. The measuring probe and the main measurement and control circuit are electrically connected through a docking cable. The schematic diagram is shown in the attached figure. Figure 6 As shown. If any of the above-mentioned water quality indicators in the water discharged from the micro-nano bubble generator exceed the standard, the multifunctional water quality sensor controls valve 6 via the controller to close, and valves 1, 2, ..., and 5 to open. The micro-nano bubble water in the micro-nano bubble generator then flows through the first, second, third, fourth, and fifth water inlets into the five-stage water purification unit, which includes a first-stage PP cotton filter, a second-stage pre-activated carbon filter, a third-stage PP cotton filter, a 0.01-micron filter element, and a post-activated carbon filter, for cleaning. It then enters the micro-nano bubble device to produce new micro-nano bubble water. The newly produced micro-nano bubble water is then tested for all water quality indicators by the multifunctional water quality sensor. If all water quality indicators meet the standards, the micro-nano bubble water can be directly supplied to the user for drinking. If any water quality indicator does not meet the standards, the micro-nano bubble water is discharged through the outlet. The above cleaning steps are repeated until all water quality indicators in the newly produced micro-nano bubble water meet the standards.

[0093] In this embodiment, the drinking water prepared by the micro-nano bubble household water purifier contains a large amount of micro-nano bubbles, which can significantly improve the taste of drinking water. A survey was conducted on 15 young people aged 20-30 years old on the taste perception (acidity, sweetness, hardness and odor) of drinking water containing micro-nano bubbles and ordinary drinking water at different stages (entry, throat, and after swallowing). The results are shown in the attached figure. Figure 7 The results show that micro-nano bubble drinking water has higher sweetness at the onset, sweetness at the throat, and sweetness after swallowing than regular drinking water, while lower acidity, hardness, unpleasant taste at the onset, acidity at the throat, hardness, unpleasant taste at the throat, and sourness after swallowing than regular drinking water. 60% of people believe that micro-nano bubble drinking water is sweeter than regular mineral drinking water, indicating that micro-nano bubble drinking water has a better taste than regular drinking water.

[0094] The present invention utilizes water quality sensors of different water purification units to monitor the performance degradation of the water purification units in real time. For water purification units with too low performance, the micro-nano bubble generating device is connected to the inefficient water purifier processing unit by opening and closing the intelligent valve. The dual effects of bubble collapse impact and OH oxidation in the micro-nano bubble water are utilized to achieve directional cleaning of the inefficient filter element, thereby extending the service life of the filter element and improving the performance of the water purifier processing unit.

[0095] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A micro-nano bubble household water purification system, characterized in that: include: A water purification module (1) comprises 1 to N levels of water purification units connected in series, wherein the No. 1 water inlet (1.1) of the first level water purification unit is connected to a tap, and a water quality sensor is provided at the water outlet of each level of water purification unit, namely, No. 1 to No. N water quality sensors; A micro-nano bubble generator comprises a vortex component (2) and a micro-nano bubble generating component (3), wherein the vortex component (2) comprises a water pump (2.5) and a vortex device (2.6), wherein the water inlet of the water pump (2.5) is connected to the water outlet of the N-th stage water purification unit, the water outlet of the water pump (2.5) is connected to the water inlet of the vortex device (2.6), the water outlet of the vortex device (2.6) is connected to the injection port of the micro-nano bubble generating component (3), and the vortex device (2.6) is further provided with an air suction pipeline (5); Each level of water purification unit is also provided with another water inlet, namely the first to Nth water inlets, the N+1th water outlet being a water outlet, which is provided on the micro-nano bubble generating component (3), and the N+1th water outlet is provided with the N+1th water quality sensor, and the N+1th water outlet is used to output drinking water that meets the standards; Controller, the controller is connected to water quality sensors 1 to N+1 respectively; The micro-nano bubble generating component (3) comprises a micro-nano mixing chamber (3.3), an exhaust valve (3.1) and a pressure gauge (3.2) are provided on the micro-nano mixing chamber (3.3), and a jet port is provided in the micro-nano mixing chamber (3.3); At least one injection head (3.4) is provided at the injection port, and a plurality of micron-sized holes are arranged on the injection head (3.4).

2. The micro-nano bubble household water purification system according to claim 1, characterized in that: The number of injection heads (3.4) is determined by the following formula: ； Where, is the number of injection heads; is the proportionality coefficient; is the volume of the micro-nano mixing chamber; To handle traffic; The system running time.

3. The micro-nano bubble household water purification system according to claim 1, characterized in that: The percentage increase in the life of the N-level water purification unit for: ； Where, is the limit value of water quality index N; The No. N water quality sensor detects the N value of the water quality index in the water discharged from the N-level water purification unit.

4. The micro-nano bubble household water purification system according to claim 1, characterized in that: The pipeline connecting the water inlet of the water pump (2.5) and the water outlet of the N-stage water purification unit is the micro-nano bubble generator water inlet pipeline (4), and the micro-nano bubble generator water inlet pipeline (4) is provided with a valve (2.2) and a water inlet flow meter (2.1).

5. The micro-nano bubble household water purification system according to claim 1, characterized in that: A rotor flow meter (2.3) and a check valve (2.4) are provided on the suction pipeline (5).

6. A method for using the micro-nano bubble household water purification system according to any one of claims 1 to 5, characterized in that: The steps include: Tap water enters the first-level water purification unit from the first water inlet (1.1). The filtered water is sent to the second-level water purification unit after being monitored by the first water quality sensor. Similarly, the water is purified by the Nth-level water purification unit and then enters the micro-nano bubble generator to produce micro-nano bubble water. After the N+1th water quality sensor monitors and finds that it is qualified, the N+1th water outlet outputs drinking water that meets the standards.

7. A cleaning method for a micro-nano bubble household water purification system according to any one of claims 1 to 5, wherein a valve is provided at each of the first to Nth water inlets, namely valves 1 to N, and valve N+1 is provided at the N+1th water outlet. Valves 1 to N are connected to water quality sensors of water purification units of levels 1 to N, respectively, in a one-to-one correspondence. Valve N+1 is connected to water quality sensor N+1, and a controller is used to control the opening and closing of the valves. The water quality sensor of each water purification unit monitors the water quality index of the unit respectively, and water quality sensor N+1 simultaneously monitors the total water quality index of water purification units of levels 1 to N. The method is characterized in that: The steps include: When the water quality monitored by the No. N water quality sensor exceeds the standard and other water quality indicators are normal, the No. N water quality sensor transmits a signal to the controller, and the controller controls valves 1 to N to open and other valves to close. The micro-nano bubble water in the micro-nano bubble generator first enters the 1 to N level water purification units through the first to Nth water inlets. After passing through the N level water purification units, the micro-nano bubble water enters the micro-nano bubble generator again through the micro-nano bubble generator inlet (4.1), and new micro-nano bubble water is prepared and flows out through the No. N+1 water outlet for direct drinking by users.

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