Nanometer bubble water generating device

Abstract

The invention discloses a nano bubble water generating device, which comprises a water pump and a water tank, a first water outlet of the water tank is connected with a water inlet of the water pump, a first cavitator is connected with a water outlet of the water pump, and a second cavitator is connected with a water outlet of the water tank. The second cavitator is arranged in the water tank and is connected with the first cavitator; the water pump pumps water from the water tank, so that negative pressure is generated in the water tank, the pumped water passes through the first cavitator and the second cavitator for one time under the suction of the negative pressure and enters the water tank again, and the circulation is carried out in this way; water and gas generate nano bubble water under repeated cavitation cutting of the first cavitator and the second cavitator. Moreover, the steps are repeated, so that the nano bubble content of water in the water tank can be greatly improved, and the quality of nano bubble water is improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas-liquid mixing, and particularly relates to a nano-bubble water generating device. Background Art

[0002] Bubbles are classified into large bubbles, micro-bubbles, sub-micro-bubbles or nano-bubbles, and there is also a more popular classification as large bubbles, small bubbles and ultra-small bubbles. Generally, the range of diameters from 10 to 100 microns is called micro-bubbles, 1 - 10 microns is sub-micro-bubbles, and 10 - 1000 nanometers is nano-bubbles. Due to the characteristics of nano-bubbles such as large specific surface area, long residence time, high interfacial potential, generation of free radicals and enhanced mass transfer, they have excellent application prospects in many fields, such as sewage treatment, plant cultivation, new material preparation, cleaning, mineral flotation, etc.

[0003] Currently, the main methods for preparing nano-bubbles include hydrodynamic cavitation and particle cavitation, acoustic or sonic degradation, electrochemical cavitation and mechanical stirring, etc.

[0004] The structure of the existing nano-bubble preparation devices is relatively complex, and it is difficult to obtain nano-bubble water with a high content at low cost. Summary of the Invention

[0005] In order to solve the deficiencies of the above-mentioned prior art, the present invention discloses a nano-bubble water generating device, including:

[0006] A water pump and a water tank, the first water outlet of the water tank is connected to the water inlet of the water pump:

[0007] A first cavitator, connected to the water outlet of the water pump;

[0008] A second cavitator, arranged in the water tank and connected to the first cavitator;

[0009] The water pump pumps water from the water tank to generate negative pressure in the water tank, and the pumped water passes through the first cavitator and the second cavitator under the suction of negative pressure and re-enters the water tank, circulating in this way;

[0010] Water and gas generate nano-bubble water under the repeated cavitation cutting of the first cavitator and the second cavitator.

[0011] A further technical solution may also be that the height of the first cavitator is higher than the height of the second cavitator.

[0012] A further technical solution may also be that the first cavitator includes:

[0013] A first housing, the first housing has a first cavitation chamber, and at least part of the first cavitation chamber is a first arc-shaped inner wall;

[0014] The first cavitation water inlet interface is connected to the first cavitation chamber and the water outlet of the water pump;

[0015] The first cavitation water outlet interface is connected to the first cavitation chamber and the second cavitator;

[0016] The first cavitation water inlet interface is located at the lower part of the first cavitation chamber, so that when water is sucked into the first cavitation chamber, it can impact the lower edge of the first arc-shaped inner wall and form a vortex under the guidance of the first arc-shaped inner wall.

[0017] A further technical solution may also be that the first cavitation chamber is a cylindrical cavity, and the first cavitation water outlet interface is connected to the middle of the bottom wall of the first cavitation chamber.

[0018] A further technical solution may also be that the first arc-shaped inner wall is provided with thread-like protrusions.

[0019] A further technical solution may also be that the second cavitator includes:

[0020] A second housing, within which there is a second cavitation chamber, and at least part of the second cavitation chamber is a second arc-shaped inner wall;

[0021] A second cavitation water inlet interface is connected to the second cavitation chamber and the first cavitator;

[0022] A second cavitation water outlet interface is connected to the internal space of the water tank;

[0023] The second cavitation water inlet interface is located at the upper part of the second cavitation chamber, so that when water is sucked into the second cavitation chamber, it can impact the upper edge of the second arc-shaped inner wall and form a vortex under the action of gravity and the guidance of the second arc-shaped inner wall.

[0024] A further technical solution may also be that the second cavitation chamber is a cylindrical cavity, and the second cavitation water outlet interface is connected to the middle of the bottom wall of the second cavitation chamber.

[0025] A further technical solution may also be that the second cavitation water inlet interface is connected to the middle of the side wall of the second cavitation chamber;

[0026] There are two second cavitation water outlet interfaces, which are respectively located in the middle of the left and right bottom walls of the second cavitation chamber.

[0027] A further technical solution may also be that there are two water tanks, and two corresponding second cavitators are provided;

[0028] The first water outlets of the two water tanks are connected to the water inlet of the water pump through a first three-way switching valve;

[0029] The two second cavitators are connected to the first cavitator through a second three-way switching valve;

[0030] The first three-way switching valve and the second three-way switching valve are opened or closed synchronously.

[0031] A further technical solution may further include:

[0032] An air supply device, which is connected to the water pump to inject the gas required for making nano-bubble water.

[0033] The nano-bubble water generating device disclosed in the present invention is respectively provided with a water tank for storing liquid and two cavitators for producing nano-bubbles; the water pump pumps water from the water tank to generate negative pressure in the water tank, and the pumped water flows through the first cavitator and the second cavitator in turn under the negative pressure attraction and then re-enters the water tank, and circulates in this way; the water is subjected to cavitation cutting in the first cavitator and the second cavitator to generate nano-bubble water. Moreover, during the continuous operation of the water pump, the water in the water tank passes through the first cavitator and the second cavitator multiple times for repeated cavitation cutting to generate nano-bubbles, thereby realizing the continuous production of nano-bubbles. Moreover, by repeating this cycle, the nano-bubble content of the water in the water tank can be greatly increased, and the quality of the nano-bubble water can be improved. Description of the Drawings

[0034] In order to more clearly illustrate the embodiments of the present invention or the existing technical solutions, the following will briefly introduce the drawings required for the description of the embodiments or the existing technical solutions. Obviously, the drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0035] Figure 1 It is a schematic structural diagram of the nano-bubble water generating device in the embodiment of the present invention. For the convenience of observation, the cover plate of the water tank is omitted in the figure;

[0036] Figure 2 It is a schematic top view of the structure of the nano-bubble water generating device in the embodiment of the present invention. For the convenience of observation, the cover plate of the water tank is omitted in the figure;

[0037] Figure 3 It is a schematic cross-sectional view of the structure of the first cavitator in the embodiment of the present invention;

[0038] Figure 4 It is another schematic cross-sectional view of the structure of the first cavitator in the embodiment of the present invention;

[0039] Figure 5 It is a schematic cross-sectional view of the structure of the second cavitator in the embodiment of the present invention;

[0040] Figure 6 This is a schematic cross-sectional view of the structure of the second cavitator in the embodiment of the present invention;

[0041] Figure 7 This is a physical picture of the nano-bubble water generating device in the embodiment of the present invention.

[0042] Explanation of reference numerals:

[0043] 1. Water pump; 11. Water inlet; 12. Water outlet; 13. Gas inlet;

[0044] 2. Water tank; 21. First water outlet;

[0045] 3. First cavitator; 31. First housing; 311. First cavitation chamber; 32. First cavitation water inlet interface; 33. First cavitation water outlet interface;

[0046] 4. Second cavitator; 41. Second housing; 411. Second cavitation chamber; 42. Second cavitation water inlet interface; 43. Second cavitation water outlet interface;

[0047] 5. Air supply device. Detailed implementation manners

[0048] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0049] In existing nano-bubble water generating devices, usually only one cavitator is provided for the production of nano-bubbles. And for some improved nano-bubble water generating devices, a cyclic preparation method is adopted, that is, the nano-bubble water is repeatedly passed through the cavitator to increase the nano-bubble content in the nano-bubble water. However, the inventors of the present application found that in this preparation method using a single cavitator, there are many large bubbles in the prepared nano-bubble water, and these large bubbles will gradually accumulate in the water tank (i.e., the box for storing nano-bubble water) during the preparation process, resulting in a gradual increase in the air pressure in the water tank. When the air pressure in the water tank reaches a certain level, for safety reasons, it is necessary to stop the preparation of nano-bubble water. Therefore, for this nano-bubble water generating device using a single cavitator, although the nano-bubble content can be increased by the cyclic preparation method, due to safety considerations, the nano-bubble content cannot be continuously increased after the air pressure in the water tank reaches a certain level.

[0050] Embodiment 1

[0051] To solve the above problems, this embodiment discloses a nano-bubble water generating device, as shown in Figure 1 , Figure 2 and Figure 7 , including:

[0052] A water pump 1 and a water tank 2, the first water outlet 21 of the water tank 2 is connected to the water inlet 11 of the water pump 1:

[0053] A first cavitator 3, connected to the water outlet 12 of the water pump 1;

[0054] A second cavitator 4, arranged in the water tank 2 and connected to the first cavitator 3;

[0055] The water pump 1 pumps water from the water tank 2 to create negative pressure in the water tank 2. The pumped water passes through the first cavitator 3 and the second cavitator 4 successively under the suction of negative pressure and then re-enters the water tank 2, circulating in this way;

[0056] Nano-bubble water is generated by the repeated cavitation cutting of water and gas in the first cavitator 3 and the second cavitator 4.

[0057] In the nano-bubble water generating device of this embodiment, a water tank 2 for storing liquid and two cavitators for producing nano-bubbles are respectively provided; the water pump 1 pumps water from the water tank 2 to create negative pressure in the water tank 2. The pumped water flows through the first cavitator 3 and the second cavitator 4 successively under the suction of negative pressure and then re-enters the water tank 2, circulating in this way; the water is cavitation-cut by the first cavitator 3 and the second cavitator 4 to generate nano-bubble water. Moreover, during the continuous operation of the water pump 1, the water in the water tank 2 passes through the first cavitator 3 and the second cavitator 4 multiple times for repeated cavitation cutting to generate nano-bubbles, thus realizing the continuous production of nano-bubbles. Moreover, by circulating in this way, the nano-bubble content of the water in the water tank 2 can be greatly increased, and the quality of the nano-bubble water can be improved.

[0058] Obviously, in the nano-bubble water generating device of this embodiment, two cavitators (the first cavitator 3 and the second cavitator 4) are used to produce nano-bubbles, so that after the water is cavitation-cut by the two cavitators, the content of large bubbles in the water can be greatly reduced. As a result, when the water enters the water tank 2, the situation where the air pressure in the water tank 2 rises due to gas aggregation can be greatly improved; in other words, compared with the existing nano-bubble water generating devices, in the nano-bubble water generating device of this application, since the content of large bubbles in the water entering the water tank 2 is less, the gas is difficult to aggregate at the top of the water tank, so that the air pressure in the water tank will not rise or the rising rate is slower, which can greatly increase the time for cyclic preparation and thus increase the nano-bubble content.

[0059] It is worth mentioning that, in this embodiment, as Figure 1 , Figure 2 and Figure 7 shown, the nano-bubble water generating device further includes a gas supply device 5, and the gas supply device 5 is connected to the water pump 1 to inject the gas required for making nano-bubble water. Specifically, the gas supply device 5 can be a gas cylinder or other devices capable of generating gas, which is used to provide the gas for making nano-bubble water. In this embodiment, the gas supply device 5 can be a compressed gas cylinder, and the gas supply device 5 is connected to the gas inlet 13 of the water pump 1.

[0060] When the water pump 1 operates, the water pump 1 simultaneously extracts the water in the water tank 2 and the gas in the gas supply device 5, and preliminarily mixes the water and the gas to form water with large bubbles; the water passes through the first cavitator 3 and the second cavitator 4 in sequence, and under the cavitation cutting of the first cavitator 3 and the second cavitator 4, the large bubbles in the water are gradually converted into nano-bubbles to form nano-bubble water. In addition, as the water pump 1 continues to operate, the bubbles in the nano-bubble water are repeatedly cavitation-cut by the first cavitator 3 and the second cavitator 4, forming nano-bubbles with a smaller diameter and increasing the content of nano-bubbles contained in the water, thereby improving the quality of the nano-bubble water.

[0061] In some other embodiments, the nano-bubble water generating device can also directly use nano-bubble water as the raw material for generating nano-bubble water. It is worth mentioning that the nano-bubbles in the nano-bubble water used as the raw material mentioned in this embodiment have a relatively large diameter. This nano-bubble water with relatively large nano-bubbles can gradually convert the nano-bubbles with a relatively large diameter into nano-bubbles with a relatively small diameter through the nano-bubble water generating device, thereby improving the quality of the nano-bubble water.

[0062] In addition, depending on the selected type of gas, the nano-bubble water generating device in this embodiment can be used to make various types of nano-bubble water such as hydrogen nano-bubble water, oxygen nano-bubble water, air nano-bubble water, and so on.

[0063] In some embodiments, the height at which the first cavitator 3 is set is higher than the height at which the second cavitator 4 is set. By setting the first cavitator 3 at a position higher than the second cavitator 4, under the dual action of gravity and negative pressure, water can form a more stable eddy current through the cavitation of the first cavitator 3 and the second cavitator 4. This design not only helps to improve the generation efficiency of nano-bubbles but also can reduce the energy consumption of the system. Specifically, after the water undergoes cavitation in the first cavitator 3 at a higher position, it flows to the second cavitator 4 at a lower position relying on gravity and negative pressure, and then undergoes cavitation in the second cavitator 4, and finally returns to the water tank 2. In this way, the water can repeatedly undergo cavitation during the circulation process, generating more nano-bubbles.

[0064] Embodiment 2

[0065] The second embodiment of the present application discloses a nano-bubble water generating device. The second embodiment is a further improvement based on the first embodiment, and the improvement lies in that: as Figure 3 and Figure 4 shown, the first cavitator 3 includes:

[0066] A first housing 31, with a first cavitation chamber 311 inside the first housing 31;

[0067] A first cavitation water inlet interface 32, connecting the first cavitation chamber 311 and the water outlet 12 of the water pump 1;

[0068] A first cavitation water outlet interface 33, accessing the first cavitation chamber 311 and the second cavitator 4.

[0069] In this embodiment, the water obtains a large kinetic energy under the pumping action of the water pump 1, so it has a high flow velocity. Therefore, the water enters the first cavitation chamber 311 through the first cavitation water inlet interface 32 under the pumping action of the water pump 1 and impacts the inner wall of the first cavitation chamber 311 to generate violent turbulence to produce nano-bubbles. Therefore, in order to improve the turbulence effect in the first cavitation chamber 311, the water outlet direction of the first cavitation water inlet interface 32 intersects but does not coincide with the water outlet direction of the first cavitation water inlet interface 32, so that after the water enters the first cavitation chamber 311, it needs to change the flow direction, thereby improving the turbulence effect and further improving the generation efficiency of nano-bubbles.

[0070] In some embodiments, as Figure 3 and Figure 4 shown, at least part of the first cavitation chamber 311 is a first arc-shaped inner wall, so that when the water is sucked into the first cavitation chamber 311, it can impact the first arc-shaped inner wall and form a vortex under the guidance of the first arc-shaped inner wall. Through the setting of the first arc-shaped inner wall, when the water is sucked into the first cavitation chamber 311, it can impact the first arc-shaped inner wall and form a vortex under the guidance of the first arc-shaped inner wall, thereby effectively improving the cavitation effect of the water and forming a vortex under the guidance of the first arc-shaped inner wall, thereby effectively improving the generation efficiency of nano-bubbles.

[0071] It is worth mentioning that, in some embodiments, as Figure 3 and Figure 4As shown, the first cavitation water inlet interface 32 is located at the lower part of the first cavitation chamber 311, so that when water is sucked into the first cavitation chamber 311, it can impact the first arc-shaped inner wall and form a vortex under the guidance of the first arc-shaped inner wall. Since the water entering the first cavitation chamber 311 contains gas, and the gas has a tendency to overflow upward in the water, therefore, the gas will accumulate in the upper part of the first cavitation chamber 311. In this embodiment, the first cavitation water inlet interface 32 is arranged at the lower part of the first cavitation chamber 311, so that the water flowing out from the first cavitation water inlet interface 32 can impact the lower edge of the first arc-shaped inner wall, enabling the water to flow upward under the guidance of the first arc-shaped inner wall and mix with the gas located in the upper part of the first cavitation chamber 311, thereby intensifying the mixing effect of water and gas, improving the cavitation effect of water, and effectively increasing the generation efficiency of nano-bubbles. It is worth mentioning that since there may be large bubbles when water is sucked into the first cavitation chamber 311, these large bubbles will accumulate at the top of the first cavitation chamber 311 to form an air cavity; if the first cavitation water inlet interface 32 is arranged at the upper part of the first cavitation chamber 311, although the water coming out from the first cavitation water inlet interface 32 can directly impact the air cavity located at the top of the first cavitation chamber 311, only a partial area of the air cavity can be impacted by the top of the first cavitation chamber 311, so that there may still be gas accumulation and air cavity formation in the area of the top of the first cavitation chamber 311 that is not directly impacted by the water coming out from the first cavitation water inlet interface 32, affecting the mixing effect of gas and water.

[0072] In some embodiments, in order to further improve the vortex effect, as Figure 3 and Figure 4 shown, the first cavitation chamber 311 is a cylindrical cavity. In other words, the inner walls of the first cavitation chamber 311 are all arc-shaped inner walls, so that when water enters the first cavitation chamber 311, it can form a rotating vortex along the arc-shaped inner wall. This vortex helps the full mixing and cavitation of water and gas in the first cavitator 3, and then generates high-quality nano-bubbles. In this embodiment, the first cavitation water outlet interface 33 is connected to the middle of the bottom wall of the second cavitation chamber, so that the water outlet direction of the first cavitation water outlet interface 33 coincides with the axis of the first cavitation chamber 311, so that the first cavitation water outlet interface 33 is located on the central axis of the vortex formed by water in the first cavitation chamber 311, which is beneficial to the outflow of water.

[0073] In addition, in some other preferred embodiments, as Figure 3 and Figure 4As shown, the first cavitation water outlet interface 33 is connected to the middle of the side wall of the first cavitation chamber 311. In this way, when water enters the first cavitation chamber 311, it impacts on the inner wall of the first cavitation chamber 311; a part of the water can form a rotating vortex along the arc-shaped inner wall and flow towards the direction where the first cavitation water outlet interface 33 is located; while another part of the water flows towards the direction away from the first cavitation water outlet interface 33, and this part of the water will impact on the inner wall of the first cavitation chamber 311 on the other side opposite to the first cavitation water outlet interface 33 and rebound and then flow towards the direction where the first cavitation water outlet interface 33 is located, and during the process of this part of the water flowing towards the direction where the first cavitation water outlet interface 33 is located, it will collide with the water on the path, thereby generating violent turbulence, which helps the full mixing of water and gas in the first cavitator 3 and the cavitation effect, and further improves the generation efficiency of nanobubbles.

[0074] In some more preferred embodiments, a turbulence promoting structure can be provided in the first cavitation chamber 311. The water obtains greater kinetic energy under the pumping action of the water pump 1, so it has a relatively high flow velocity. Therefore, by arranging the turbulence promoting structure in the first cavitation chamber 311, the kinetic energy of the water can be fully utilized, so that the water can further improve the turbulence effect to generate nanobubbles under the action of the turbulence promoting structure. In some embodiments, the turbulence promoting structure can be protrusions or corrugated objects arranged at intervals in the length extension direction of the first cavitation chamber 311, such as a partition net, a metal grille or a partition board with a number of through holes. The partition net, the metal grille or the partition board has holes or openings for the liquid to flow through, and when the high-speed flowing liquid passes through these holes or openings, violent turbulence phenomena can occur. Specifically, the turbulence promoting structure can be a thread-like protrusion provided on the first arc-shaped inner wall.

[0075] Embodiment 3

[0076] This embodiment is a further improvement based on the second embodiment, and the improvement lies in further defining the structure of the second cavitator 4. Specifically, as Figure 5 and Figure 6 shown, the second cavitator 4 includes:

[0077] A second housing 41, and a second cavitation chamber 411 is provided inside the second housing 41;

[0078] A second cavitation water inlet interface 42, connecting the second cavitation chamber 411 and the first cavitator 3;

[0079] A second cavitation water outlet interface 43, connected to the internal space of the water tank 2.

[0080] Under the pumping action of the water pump 1, water passes through the first cavitator 3 and enters the second cavitation chamber 411 through the second cavitation water inlet interface 42, and impacts the inner wall of the second cavitation chamber 411 to generate violent turbulence to produce nano-bubbles. Therefore, in order to improve the turbulence effect in the second cavitation chamber 411, an included angle is formed between the water outlet direction of the second cavitation water inlet interface 42 and the water outlet direction of the second cavitation water inlet interface 42, so that after the water enters the second cavitation chamber 411, it needs to impact on the inner wall of the second cavitation chamber 411 to change the flow direction, thereby improving the turbulence effect and further improving the generation efficiency of nano-bubbles.

[0081] In some embodiments such as Figure 5 and Figure 6 shown, at least a part of the second cavitation chamber 411 is a second arc-shaped inner wall, so that when the water is sucked into the second cavitation chamber 411, it can impact the second arc-shaped inner wall and form a vortex under the guidance of the second arc-shaped inner wall. Through the setting of the second arc-shaped inner wall, when the water is sucked into the second cavitation chamber 411, it can impact the second arc-shaped inner wall and form a vortex under the guidance of the second arc-shaped inner wall, thereby effectively improving the cavitation effect of the water and forming a vortex under the guidance of the second arc-shaped inner wall, thereby effectively improving the generation efficiency of nano-bubbles.

[0082] Since the water entering the first cavitation chamber 311 contains gas, and the gas has a tendency to overflow upward in the water, the gas will accumulate in the upper part of the first cavitation chamber 311. Therefore, in the first cavitator 3, the first cavitation water inlet interface 32 is arranged at the lower part of the first cavitation chamber 311 body, so that after the water flows out of the first cavitation water inlet interface 32, it can impact the lower edge of the first arc-shaped inner wall, so that the water can flow upward under the guidance of the first arc-shaped inner wall and mix with the gas located in the upper part of the first cavitation chamber 311 body, thereby intensifying the mixing effect of the water and the gas. In some embodiments, different from the structure of the first cavitator 3, the second cavitation water inlet interface 42 is located at the upper part of the second cavitation chamber 411. Since most of the bubbles with larger diameters in the water are transformed into nano-bubbles with smaller diameters after the water passes through the cavitation cutting of the first cavitator 3, the speed of these nano-bubbles escaping from the water is slower and they will not accumulate in the upper part of the second cavitation chamber 411, nor will they form a gas cavity in the upper part of the second cavitation chamber 411. In other words, in the second cavitation chamber 411, it is not necessary to consider the influence of the gas cavity on the mixing effect of the gas and the water. Therefore, as Figure 5 and Figure 6 shown, in this embodiment, the second cavitation water inlet interface 42 can be arranged at the upper part of the second cavitation chamber 411. In addition, the purpose of such a setting is also to make full use of the height difference between the upper and lower parts of the second cavitation chamber 411, that is, to utilize the kinetic energy of the water flowing from the upper part of the second cavitation chamber 411 to the lower part of the second cavitation chamber 411 to increase the flow rate of the water, thereby improving the turbulence effect and further improving the generation efficiency of nano-bubbles.

[0083] In some embodiments, in order to further improve the eddy current effect, the second cavitation chamber 411 is a cylindrical cavity. In other words, the inner walls of the second cavitation chamber 411 are all arc-shaped inner walls, so that when water enters the second cavitation chamber 411, it can form a rotating eddy current along the arc-shaped inner wall. This eddy current helps the full mixing of water and gas in the second cavitator 4 and the cavitation effect, and then generates high-quality nano-bubbles. In this embodiment, the second cavitation water outlet 43 is connected to the middle of the bottom wall of the second cavitation chamber 411, so that the water outlet direction of the second cavitation water outlet 43 coincides with the axis of the second cavitation chamber 411, so that the second cavitation water outlet 43 is located on the central axis of the eddy current formed by water in the second cavitation chamber 411, which is beneficial to the outflow of water.

[0084] In some embodiments, such as Figure 5 and Figure 6 shown, the second cavitation water inlet 42 is connected to the middle of the side wall of the second cavitation chamber 411;

[0085] There are two second cavitation water outlets 43, which are respectively located in the middle of the left and right bottom walls of the second cavitation chamber 411.

[0086] In this way, when water enters the second cavitation chamber 411, it impacts on the inner wall of the second cavitation chamber 411; a part of the water can form a rotating eddy current along the arc-shaped inner wall and flow towards the direction where one of the second cavitation water outlets 43 is located; while the other part of the water flows towards the direction where the other second cavitation water outlet 43 is located, so that a uniform eddy current is formed in the second cavitation chamber 411, further optimizing the water flow path and enhancing the stability and efficiency of nano-bubble generation.

[0087] In some more preferred embodiments, a turbulence promoting structure may be provided in the second cavitation chamber 411. Water obtains a large kinetic energy under the pumping action of the water pump 1, so it has a relatively high flow velocity. Therefore, by arranging the turbulence promoting structure in the second cavitation chamber 411, the kinetic energy of water can be fully utilized, so that under the action of the turbulence promoting structure, the turbulence effect can be further improved to generate nano-bubbles. In some embodiments, the turbulence promoting structure may be protrusions or corrugated objects arranged at intervals in the length extension direction of a plurality of second cavitation chambers 411, such as a partition net, a metal grille or a partition board with a number of through holes. The partition net, the metal grille or the partition board has holes or openings for liquid to flow through, and when the high-speed flowing liquid passes through these holes or openings, a violent turbulence phenomenon can occur. Specifically, the turbulence promoting structure may be a threaded protrusion provided on the second arc-shaped inner wall.

[0088] Embodiment Four

[0089] This embodiment is a further improvement based on the first, second, or third embodiment, and the improvement lies in that: as Figure 1 , Figure 2 and Figure 7 shown, there are two water tanks 2, and two second cavitators 4 are correspondingly provided;

[0090] The first water outlets 21 of the two water tanks 2 are connected to the water inlet 11 of the water pump 1 through a first three-way switching valve;

[0091] The two second cavitators 4 are connected to the first cavitator 3 through a second three-way switching valve;

[0092] The first three-way switching valve and the second three-way switching valve are opened or closed synchronously.

[0093] By providing two water tanks 2 and two second cavitators 4, the water pump 1 can pump water from any one of the water tanks 2, and the switching of the water flow is realized through the first three-way switching valve and the second three-way switching valve. Specifically, when the water in one water tank 2 is subjected to cavitation treatment, the water flow can be switched to another water tank 2 through the switching valve, so as to realize the continuous generation of nano-bubble water. This design not only improves the working efficiency of the device, but also allows another water tank 2 to continue working when one water tank 2 is being maintained or cleaned, ensuring the continuous operation of the device.

[0094] Among them, the synchronous opening or closing of the first three-way switching valve and the second three-way switching valve can be realized through mechanical linkage or an electric control system. Mechanical linkage can achieve synchronous action through a connecting rod mechanism, while the electric control system can achieve precise control through a controller and an electric valve. As a preferred embodiment, an electric control system can be adopted, and the switching valve is precisely controlled by the controller to ensure the stable switching of the water flow and the efficient operation of the device.

[0095] In some embodiments, the nano-bubble generator further includes:

[0096] A ventilation valve, communicating with the water tank 2;

[0097] A water outlet valve, communicating with the water tank 2 and used for delivering water outwards;

[0098] A water inlet valve, communicating with the water tank 2 and used for delivering water into the water tank 2.

[0099] Specifically, when the nano-bubble generator has been continuously operating for a period of time and the nano-bubble content of the liquid in the water tank 2 reaches the set threshold, or when the pressure in the water tank 2 reaches the safety warning pressure, or when the preparation time reaches the preset time, the water pump 1 is turned off; subsequently, the ventilation valve is opened to connect the water tank 2 with the outside; the water outlet valve is opened to deliver the nano-bubble water in the water tank 2 to the designated position. After the nano-bubble water is delivered, the water outlet valve is closed, and the water inlet valve is opened to refill the emptied water tank 2 with water to the designated liquid level; subsequently, the ventilation valve is closed, and the water pump 1 is reopened to produce nano-bubbles again, and this cycle repeats.

[0100] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention rather than to limit them. Although the embodiments of the present invention have been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the embodiments of the present invention can still be modified or equivalently replaced, and these modifications or equivalent replacements do not enable the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A nano bubble water generating device, characterized in that: include: A water pump and a water tank, wherein the first water outlet of the water tank is connected to the water inlet of the water pump: a first cavitator connected to the water outlet of the water pump; A second cavitator, disposed in the water tank and connected to the first cavitator; The water pump draws water from the water tank to generate negative pressure in the water tank, and the drawn water passes through the first cavitator and the second cavitator under the suction of negative pressure and re-enters the water tank, thereby circulating; Water and gas generate nano bubble water under repeated cavitation cutting by the first cavitator and the second cavitator.

2. The nano bubble water generating device according to claim 1, characterized in that: The first cavitator is arranged at a height higher than the second cavitator.

3. The nano bubble water generating device according to claim 1, characterized in that: The first cavitator comprises: A first shell, wherein the first shell has a first cavitation cavity therein, and the first cavitation cavity is at least partially a first arc-shaped inner wall; A first cavitation water inlet interface, connecting the first cavitation cavity and the water outlet of the water pump; A first cavitation water outlet interface, connected to the first cavitation cavity and the second cavitator; The first cavitation water inlet interface is located at the lower part of the first cavitation cavity, so that water can impact the lower edge of the first arc-shaped inner wall when being sucked into the first cavitation cavity, and form a vortex under the guidance of the first arc-shaped inner wall.

4. The nano bubble water generating device according to claim 3, characterized in that: The first cavitation cavity is a cylindrical cavity, and the first cavitation water outlet interface is connected to the middle of the bottom wall of the first cavitation cavity.

5. The nano bubble water generating device according to claim 4, characterized in that: The first arc-shaped inner wall is provided with a thread-shaped protrusion.

6. The nano bubble water generating device according to claim 1, characterized in that: The second cavitator comprises: A second shell, wherein the second shell has a second cavitation cavity therein, and the second cavitation cavity is at least partially a second arc-shaped inner wall; A second cavitation water inlet interface, connecting the second cavitation cavity and the first cavitator; A second cavitation water outlet interface connected to the inner space of the water tank; The second cavitation water inlet port is located at the upper part of the second cavitation cavity, so that water can impact the upper edge of the second arc-shaped inner wall when being sucked into the second cavitation cavity, and form a vortex under the guidance of gravity and the second arc-shaped inner wall.

7. The nano bubble water generating device according to claim 6, characterized in that: The second cavitation cavity is a cylindrical cavity, and the second cavitation water outlet interface is connected to the middle part of the bottom wall of the second cavitation cavity.

8. The nano bubble water generating device according to claim 6, characterized in that: The second cavitation water inlet interface is connected to the middle of the side wall of the second cavitation cavity; There are two second cavitation water outlet interfaces, which are respectively located in the middle of the left and right bottom walls of the second cavitation cavity.

9. The nano bubble water generating device according to any one of claims 6 to 8, characterized in that: There are two water tanks, and two second cavitators are correspondingly arranged; The first water outlets of the two water tanks are connected to the water inlet of the water pump via a first three-way switching valve; The two second cavitators are connected to the first cavitator via a second three-way switching valve; The first three-way switching valve and the second three-way switching valve are opened or closed synchronously.

10. The nano bubble water generating device according to claim 1, characterized in that: Also includes: An air supply device is connected to the water pump so as to inject gas required for making nano bubble water.

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