A rotating ultra-fine bubble generating device

Abstract

The present invention discloses a swirling ultrafine bubble generating device, comprising: a first gas-liquid inlet for inputting gas or liquid into a negative pressure chamber; a negative pressure chamber for forming mixed soda, the negative pressure chamber being composed of a negative pressure chamber top wall, a negative pressure chamber side wall and a negative pressure chamber bottom wall; an inner flow chamber being composed of a negative pressure chamber side wall and an inner flow chamber tube wall, the inner flow chamber comprising a linear water inlet portion and a circular swirl portion, wherein a plurality of tangent water inlet holes are arranged on the negative pressure chamber side wall corresponding to the circular swirl portion; and a gas-liquid outlet located at the center of the negative pressure chamber bottom wall for spraying mixed soda. The present invention generates ultrafine bubbles through mechanical cutting, thereby solving the problems of large volume, high power, high energy consumption and low efficiency of traditional bubble generating devices, and greatly expanding the application scope of ultrafine bubble generating devices.

Description

Technical Field

[0001] The invention relates to the technical field of bubble generation, in particular to a swirling ultra-micro bubble generating device. Background Art

[0002] With the continuous development of science and technology, ultrafine bubbles are increasingly used in various fields of society. Ultrafine bubbles have extremely wide applications in real life, such as fruit and vegetable cleaning, aquaculture, crop irrigation, healthy drinks, medical treatment, etc. Especially at present, the water environment in various parts of my country is seriously polluted, and the demand for high-concentration ultrafine bubbles in the field of sewage treatment is particularly urgent.

[0003] The existing technology generally produces ultrafine bubbles through traditional electrolysis, ultrasound, or dissolved gas tanks, but these methods have large equipment size and very high energy consumption, so their scope of application is very limited. In addition, the number of nano-scale bubbles produced by the above equipment is too small, and it is not easy to preserve them in water for a long time. It is difficult to be widely used in daily production and life, and cannot meet the actual needs of multiple uses. Summary of the invention

[0004] In view of this, an embodiment of the present application provides a swirling ultrafine bubble generating device, comprising: a first gas-liquid inlet, for inputting gas or liquid into a negative pressure chamber; a negative pressure chamber, for forming a mixed soda, the negative pressure chamber being composed of a negative pressure chamber top wall, a negative pressure chamber side wall and a negative pressure chamber bottom wall; an inner flow chamber, being composed of a negative pressure chamber side wall and an inner flow chamber tube wall, the inner flow chamber comprising a straight water inlet portion and a circular vortex portion, wherein a plurality of tangential water inlet holes are arranged on the negative pressure chamber side wall corresponding to the circular vortex portion; a gas-liquid outlet, located at the center of the negative pressure chamber bottom wall, for spraying the mixed soda.

[0005] Preferably, a first closed opening is provided between the first gas-liquid inlet and the negative pressure chamber.

[0006] Preferably, the top wall of the negative pressure chamber is in the shape of an inwardly recessed groove with a curvature.

[0007] Preferably, the inner cross-section of the negative pressure chamber is a standard circle.

[0008] Preferably, the tangential water inlet holes are orderly distributed on the side wall of the negative pressure chamber corresponding to the circular swirl part.

[0009] Preferably, the linear water inlet portion of the inner flow cavity is externally connected with a water injection device.

[0010] Preferably, the material used to manufacture the ultrafine bubble generating device is one or a combination of metal, plastic, ceramic, silicide, oxide, rubber, and carbide.

[0011] Another embodiment of the present invention also provides a method for generating ultrafine bubbles, characterized in that it includes: S1, a first liquid enters the circular surrounding part from the straight water inlet part of the inner flow cavity, and performs a first swirling acceleration; S2, the first liquid that has undergone the first swirling acceleration enters the negative pressure cavity from the tangent water inlet hole arranged on the side wall of the negative pressure cavity corresponding to the circular swirl part, and performs a second swirling acceleration; S3, when the first liquid undergoes a second swirling acceleration in the negative pressure cavity, a negative pressure is generated at the swirling center position inside the negative pressure cavity; S4, the negative pressure generated at the swirling center position inside the negative pressure cavity draws the second gas or liquid into the negative pressure cavity through the first gas-liquid inlet; S5, the first liquid and the second gas or liquid are swirled at high speed inside the negative pressure cavity, and the internal gas and liquid are cut or sheared during the swirling process; S6, the cut gas-liquid or liquid-liquid mixture is ejected from the gas-liquid outlet.

[0012] Preferably, the second gas or liquid and the first liquid are different media.

[0013] Preferably, the particle size of the gas-liquid or liquid-liquid mixture sprayed from the gas-liquid outlet is less than 100 microns.

[0014] The swirling ultrafine bubble generating device and generating method described in the embodiment of the present invention generates ultrafine bubbles through the principle of mechanical cutting. No electrolysis device or ultrasonic generating device is required in the device, which not only solves the problems of large volume, high power, high energy consumption and low efficiency of the traditional bubble generating device, but also greatly expands the application scope of the ultrafine bubble generating device. At the same time, through the design of the inner flow cavity and the negative pressure cavity, the gas and liquid can be swirled multiple times at high speed to achieve intense mixing, cutting and shearing, so that the gas or liquid can be fully cut to reach the particle size of nanometer level, and can be continuously generated in large quantities with high efficiency. Since the buoyancy effect on the gas particle size is almost negligible after reaching the nanometer level, the ultrafine bubbles generated by the present invention can be stored in water for a long time, overcoming the shortcomings of the existing equipment that the ultrafine bubbles are too low in concentration, small in number, and not easy to be stored in water for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following is a brief introduction to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 A longitudinal cross-sectional view of a swirling ultrafine bubble generating device along the BB' section provided by an embodiment of the present invention;

[0017] Figure 2A transverse cross-sectional view of a swirling ultrafine bubble generating device along section AA' provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0019] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "winding", "mixing" and "connection" should be understood in a broad sense. For example, "connection" can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] In this article, relational terms such as first and second, etc. are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprise", "include" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the statement "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0021] The embodiment of the present invention provides a swirling ultrafine bubble generating device, comprising:

[0022] The first gas-liquid inlet 1 is used to input gas or liquid into the negative pressure chamber 2 .

[0023] In one embodiment of the present invention, in order to ensure that the suction efficiency is not reduced due to air leakage during negative pressure suction, a first closed port 11 is provided between the first gas-liquid inlet 1 and the negative pressure chamber 2, for closing the connection between the first gas-liquid inlet 1 and the negative pressure chamber 2. In one embodiment of the present invention, the first gas-liquid inlet 1 is a tubular structure made of one or a combination of metal, plastic, rubber, ceramic, silicide, oxide, rubber, and carbide.

[0024] In order to ensure that sufficient gas or liquid can still be inhaled when the negative pressure generated by the centrifugal force in the negative pressure chamber is insufficient, in one embodiment of the present invention, an air pump or a water pump is externally connected to the first gas-liquid inlet 1, preferably, the air pump or the water pump is detachable, and can press the gas or liquid into the negative pressure chamber 2 through the first gas-liquid inlet 1 when needed. Further preferably, a regulating valve is provided between the air pump or the water pump and the first gas-liquid inlet 1, and the regulating valve can adjust the flow rate of the second gas or liquid pressed into the negative pressure chamber 2 from the first gas-liquid inlet 1.

[0025] The negative pressure chamber 2 is used to form mixed soda, and the negative pressure chamber 2 is composed of a negative pressure chamber top wall 21, a negative pressure chamber side wall 22 and a negative pressure chamber bottom wall 23.

[0026] In one embodiment of the present invention, the negative pressure chamber top wall 21 is in the shape of an inwardly recessed groove with an arc. When the gas-liquid or liquid-liquid mixture swirls in the negative pressure chamber 2, a large centrifugal force is generated. When the device is operated for a long time, the top is easily corroded. By adopting the inwardly recessed groove with an arc, the mixed liquid can flow more stably, thereby reducing corrosion to the bottom and extending the use time. At the same time, the generated ultrafine bubbles are also more stable.

[0027] In one embodiment of the present invention, in order to reduce the resistance when the mixed soda is swirled, the inner cross-section of the negative pressure chamber 2 is a standard circle. Further, in order to increase the adaptability of the ultrafine bubble generating device, the outer shape of the negative pressure chamber 2 is a square, a circle, a regular hexagon or other suitable shapes.

[0028] The inner flow cavity 3 is composed of the negative pressure cavity side wall 22 and the inner flow cavity tube wall 31. The inner flow cavity 3 includes a linear water inlet portion 32 and a circular vortex portion 33, wherein a plurality of tangential water inlet holes 34 are arranged on the negative pressure cavity side wall 22 corresponding to the circular vortex portion 33.

[0029] In one embodiment of the present invention, in order to ensure that the liquid can be sufficiently accelerated when entering the negative pressure chamber 2 from the inner flow chamber 3, the negative pressure chamber side wall 22 has a certain thickness, and the thickness ranges from 1mm to 300mm. Further, the length of the tangential water inlet hole 34 ranges from 2mm to 600mm. In one embodiment of the present invention, the opening direction of the tangential water inlet hole 34 is the same as the flow direction of the liquid in the circular vortex portion 33 of the inner flow chamber.

[0030] In one embodiment of the present invention, in order to increase the water inlet amount of the tangential water inlet holes 34, the tangential water inlet holes 34 are orderly distributed on the negative pressure chamber side wall 22 corresponding to the circular swirl portion. In a preferred embodiment of the present invention, a total of 8 tangential water inlet holes 34 are provided, 2 are arranged in parallel in the longitudinal direction, and one is arranged every 90° in the transverse direction. In another preferred embodiment of the present invention, a total of 18 tangential water inlet holes 34 are provided, 3 are arranged in parallel in the longitudinal direction, and one is arranged every 60° in the transverse direction.

[0031] In one embodiment of the present invention, the shape of the tangential water inlet hole 34 is rectangular, square, circular, elliptical, polygonal or irregular. Further, in order to make the liquid obtain a greater acceleration after passing through the tangential water inlet hole 34, the shape of the tangential water inlet hole 34 is elliptical. Furthermore, the inner diameter of the tangential water inlet hole 34 is a structure that remains unchanged or gradually narrows from the outside to the inside.

[0032] In order to reduce the loss of liquid during flow, the inner cross section of the linear water inlet portion 32 of the inner flow cavity 3 is circular, elliptical or other smooth cross section. Further, in order to increase the adaptability of the ultrafine bubble generating device, the outer cross section of the linear water inlet portion 32 is square, circular, regular hexagonal or other adaptable shapes.

[0033] In one embodiment of the present invention, in order to further increase the liquid flow rate, the linear water inlet portion 32 of the inner flow cavity 3 is externally connected to a water injection device. Preferably, the water injection device can provide liquid with a certain pressure to be injected into the linear water inlet portion 32 of the inner flow cavity 3. In one embodiment, the water injection device is a water pump or a water tower. Preferably, the water pump is a high-pressure water pump, and more preferably, the water pump is a miniaturized high-pressure water pump that is easy to integrate, which can not only improve the spiral cutting efficiency, but also achieve high integration and reduce total energy consumption. Further preferably, the water pressure provided by the high-pressure water pump is adjustable, and the total amount of liquid pressed into the inner flow cavity per unit time can be controlled by adjusting the water pressure.

[0034] The gas-liquid outlet 4 is located at the center of the bottom wall 23 of the negative pressure chamber and is used for spraying mixed soda and water.

[0035] In one embodiment of the present invention, the gas-liquid outlet 4 is formed by a trapezoidal blockage 41 to form a wide outer and narrow inner structure, and further, a second gas-liquid inlet 42 is provided on the gas-liquid outlet 4. A second closed port 43 is provided between the second gas-liquid inlet 42 and the gas-liquid outlet 4, for closing the connection between the second gas-liquid inlet 42 and the gas-liquid outlet 4. In one embodiment of the present invention, the second gas-liquid inlet 42 is a tubular structure made of one or a combination of metal, ceramic, plastic, silicide, oxide, rubber, carbide.

[0036] In one embodiment of the present invention, the internal cross-sectional shape of the gas-liquid outlet 4 is circular, and the external cross-sectional shape may be square, circular, regular hexagonal or other suitable shapes.

[0037] Considering that the mixed soda rotates at high speed for a long time in actual use of the present invention, in order to reduce wear, the winding ultrafine bubble generating device is made of a combination of one or more of metal, ceramic, plastic, rubber, silicide, oxide, and carbide with high surface smoothness. Further, in order to increase the anti-corrosion properties of the present invention, the device is composed of ceramic or plastic or silicide materials with high surface smoothness. Further, the ceramic material is a combination of one or more of steatite, yttrium oxide, cordierite, forsterite, aluminum nitride, mullite, zirconium oxide, silicon oxide, aluminum oxide, metal ceramics, ordinary ceramics, sapphire, silicon carbide, and silicon nitride.

[0038] In another embodiment of the present invention, a method for generating ultrafine bubbles based on the winding ultrafine bubble generating device is provided, comprising:

[0039] S1, the first liquid enters the circular surrounding part 33 from the straight water inlet part 32 of the inner flow cavity 3, and undergoes the first swirling acceleration.

[0040] In one embodiment of the present invention, the first liquid may be water or other liquids. In order to ensure the acceleration effect, the first rotation is performed for at least one cycle.

[0041] In the embodiment of the present invention where the linear water inlet portion 32 is externally connected to a water injection device, the first liquid is firstly pressed into the linear water inlet portion 32 through the external water injection device, and then enters the circular surrounding portion 33, and undergoes a first swirling acceleration during the swirling of the circular surrounding portion 33, which can increase the liquid flow rate and further improve the efficiency of the swirling cutting. In the embodiment where the water injection device is a high-pressure water pump, the water pressure of the high-pressure water pump can be set to control the total amount of liquid pressed into the inner flow cavity per unit time.

[0042] S2, the first liquid accelerated by the first swirl enters the negative pressure chamber 2 from the tangential water inlet hole 34 provided on the negative pressure chamber side wall 22 corresponding to the circular swirl portion 33, and undergoes a second swirl acceleration.

[0043] During the process of the first liquid that has been accelerated by the first vortex vortex vortexing in the circular vortex portion 33 of the inner flow chamber 3, part of the first liquid enters the negative pressure chamber 2 along the tangent of the side wall through the tangential water inlet hole 34. Since the tangential water inlet hole 34 has a special shape and a certain thickness, the first liquid is accelerated again in the process of passing through the tangential water inlet hole 34, and after accelerating into the negative pressure chamber 2, it begins to vortex and accelerate for the second time around the center position of the negative pressure chamber 2.

[0044] S3, when the first liquid is accelerated in the negative pressure chamber 2 for the second time, negative pressure is generated at the center of the rotation inside the negative pressure chamber 2.

[0045] In the negative pressure chamber 2, after the first liquid enters the negative pressure chamber 2 through the tangential water inlet hole 34, it undergoes a second swirl acceleration along the inner wall of the negative pressure chamber, and generates centrifugal force during the high-speed swirl, which generates negative pressure at the central axis of the negative pressure chamber 2. Preferably, in order to ensure that the negative pressure generated at the central axis of the negative pressure chamber 2 is large enough, the second swirl acceleration is performed for at least two weeks.

[0046] S4, the negative pressure generated at the center of the rotation inside the negative pressure chamber 2 sucks the second gas or liquid into the negative pressure chamber 2 through the first gas-liquid inlet 1.

[0047] Furthermore, the negative pressure generated in step S3 is used to automatically suck the gas or liquid entering from the first gas-liquid inlet 1 into the negative pressure chamber 2 for gas-liquid or liquid-liquid mixed cutting. In order to ensure that sufficient gas or liquid can still be sucked in when the negative pressure generated by the centrifugal force in the negative pressure chamber is insufficient, in one embodiment of the present invention, an air pump or water pump is externally connected to the first gas-liquid inlet 1. Preferably, the air pump or water pump is detachable and can press the gas or liquid into the negative pressure chamber 2 through the first gas-liquid inlet 1 when needed.

[0048] In one embodiment of the present invention, in order to increase the efficiency of cutting and stirring and make the particle size of bubbles or droplets smaller, the second gas or liquid and the first liquid are different media, and further, the second liquid and the first liquid have different densities.

[0049] In one embodiment of the present invention, the size and proportion of the particle sizes can be adjusted by adjusting the flow rate of the medium sucked into the first gas-liquid inlet 1 .

[0050] S5, the first liquid and the second gas or liquid are swirled at high speed inside the negative pressure chamber 2, and the gas and liquid inside are fully cut or sheared during the swirling process.

[0051] In one embodiment of the present invention, the following S51-S52 can be used to make the spiral cutting of gas and liquid more complete, specifically:

[0052] S51 , adjusting the flow rate of the second gas or liquid to the maximum, so that as much second gas or liquid as possible is injected into the negative pressure chamber 2 through the first gas-liquid inlet 1 .

[0053] The flow rate of the second gas or liquid can be adjusted by an external air pump or water pump. At this time, the tone generated in the negative pressure chamber 2 is low, and the contact time of the second gas or liquid per unit volume with the first liquid is short.

[0054] S52, adjusting the flow rate of the second gas or liquid again according to the actual water depth and water quality, so as to reduce the flow rate of the second gas or liquid injected into the negative pressure chamber 2 through the first gas-liquid inlet 1.

[0055] At this time, the tone generated in the negative pressure chamber gradually becomes higher, and the contact time of the second gas or liquid per unit volume with the first liquid is greatly increased, thereby making the swirling cutting of the gas and liquid more complete and achieving the best effect.

[0056] S6, the gas-liquid or liquid-liquid mixture after being fully cut is ejected from the gas-liquid outlet 4.

[0057] In one embodiment of the present invention, by adjusting the amount of water entering the bubble generating device from the inner flow cavity linear water inlet portion 32, the speed at which the gas-liquid or liquid-liquid mixture after sufficient cutting is ejected from the gas-liquid outlet 4 can be controlled. In an embodiment in which the inner flow cavity linear water inlet portion 32 is externally connected to a high-pressure water pump, the water pressure of the high-pressure water pump can be set to control the speed at which the gas-liquid or liquid-liquid mixture is ejected from the gas-liquid outlet 4.

[0058] In one embodiment of the present invention, the average particle size of the gas-liquid or liquid-liquid mixture sprayed from the gas-liquid outlet 4 is less than 100 micrometers. Preferably, the average particle size of the gas-liquid or liquid-liquid mixture can be less than 100 nanometers.

[0059] By adopting the swirling ultrafine bubble generating device and generating method described in the embodiment of the present invention, ultrafine bubbles are generated by the principle of mechanical cutting, and no electrolysis device or ultrasonic generating device is required in the device, which not only solves the problem of large volume, high power, high energy consumption and low efficiency of the traditional bubble generating device, but also greatly expands the application range of the ultrafine bubble generating device. At the same time, through the design of the inner flow cavity and the negative pressure cavity, the gas and liquid can be swirled multiple times at high speed to achieve intense mixing, cutting and shearing, so that the gas or liquid can be fully cut to reach the particle size of nanometer level, and can be continuously generated in large quantities with high efficiency. Since the buoyancy effect on the gas particle size is almost negligible after reaching the nanometer level, the ultrafine bubbles generated by the present invention can be stored in water for a long time, overcoming the shortcomings of the existing equipment that the ultrafine bubble concentration is too low, the number is small, and it is not easy to be stored in water for a long time.

[0060] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0061] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A spiral ultrafine bubble generating device, characterized in that: include: A first gas-liquid inlet (1) for inputting gas or liquid into the negative pressure chamber (2); A negative pressure chamber (2) is used to form mixed soda, wherein the negative pressure chamber (2) is composed of a negative pressure chamber top wall (21), a negative pressure chamber side wall (22) and a negative pressure chamber bottom wall (23); The inner flow cavity (3) is composed of a negative pressure cavity side wall (22) and an inner flow cavity tube wall (31), wherein the inner flow cavity (3) includes a linear water inlet portion (32) and a circular vortex portion (33), wherein a plurality of tangential water inlet holes (34) are arranged on the negative pressure cavity side wall (22) corresponding to the circular vortex portion (33), and the length of the tangential water inlet holes (34) ranges from 2 mm to 600 mm; The inner cross-section of the linear water inlet portion (32) of the inner flow cavity (3) is circular or elliptical; the outer cross-section of the linear water inlet portion (32) is square, circular or regular hexagonal; A gas-liquid outlet (4) is located at the center of the bottom wall (23) of the negative pressure chamber and is used to spray the mixed soda and water; The negative pressure chamber top wall (21) is in the shape of an inwardly recessed groove with a curvature; The negative pressure chamber side wall (22) has a certain thickness, and the thickness ranges from 1 mm to 300 mm; The inner diameter of the tangential water inlet hole (34) is a structure that gradually narrows from the outside to the inside; the shape of the tangential water inlet hole (34) is elliptical; The gas-liquid outlet (4) is formed into a structure with a wide outside and a narrow inside by a trapezoidal blockage (41); A second gas-liquid inlet (42) is provided on the gas-liquid outlet (4); A second closed port (43) is provided between the second gas-liquid inlet (42) and the gas-liquid outlet (4) for closing the connection portion between the second gas-liquid inlet (42) and the gas-liquid outlet (4).

2. The device according to claim 1, characterized in that A first closed opening (11) is provided between the first gas-liquid inlet (1) and the negative pressure chamber (2).

3. The device according to claim 1, characterized in that The inner cross-section of the negative pressure chamber (2) is a standard circle.

4. The device according to claim 1, characterized in that The tangential water inlet holes (34) are orderly distributed on the negative pressure chamber side wall (22) corresponding to the circular swirl portion (33).

5. The device according to claim 1, characterized in that The linear water inlet portion (32) of the inner flow cavity (3) is externally connected to a water injection device.

6. The device according to claim 1, characterized in that The material for manufacturing the ultrafine bubble generating device is one or a combination of metal, ceramic, plastic, silicide, oxide, rubber and carbide.

7. A method for generating ultrafine bubbles based on the device according to claim 1, characterized in that: include: S1, the first liquid enters the circular vortex part (33) from the linear water inlet part (32) of the inner flow chamber (3) and undergoes the first vortex acceleration; S2, the first liquid accelerated by the first swirl enters the negative pressure chamber (2) from the tangential water inlet hole (34) provided on the negative pressure chamber side wall (22) corresponding to the circular swirl portion (33), and undergoes a second swirl acceleration; S3, when the first liquid is accelerated by a second rotation in the negative pressure chamber (2), negative pressure is generated at the rotation center position inside the negative pressure chamber (2); S4, the negative pressure generated at the center of the rotation inside the negative pressure chamber (2) sucks the second gas or liquid into the negative pressure chamber (2) through the first gas-liquid inlet (1); S5, the first liquid and the second gas or liquid are swirled at high speed inside the negative pressure chamber (2), and the gas and liquid inside are cut or sheared during the swirling process; S6, the gas-liquid or liquid-liquid mixture after cutting or shearing is ejected from the gas-liquid outlet (4); The step S5 further comprises: S51, adjusting the flow rate of the second gas or liquid by an external air pump or water pump, adjusting the flow rate of the second gas or liquid to a maximum, so that as much second gas or liquid as possible is injected into the negative pressure chamber (2) through the first gas-liquid inlet (1), and at this time, the tone generated in the negative pressure chamber (2) is low; S52, the flow rate of the second gas or liquid is adjusted again according to the actual water depth and water quality, and the flow rate of the second gas or liquid injected into the negative pressure chamber (2) through the first gas-liquid inlet (1) is reduced. At this time, the tone of the sound generated in the negative pressure chamber (2) gradually becomes higher.

8. The method according to claim 7, characterized in that The second gas or liquid is a different medium from the first liquid.

9. The method according to claim 7, characterized in that The particle size of the gas-liquid or liquid-liquid mixture sprayed out from the gas-liquid outlet (4) is less than 100 microns.

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