Bubble generator and ozone aerator

Abstract

The present application relates to the field of gas-liquid mixing, and provides a bubble generator and an ozone aerator, wherein the bubble generator comprises an inlet connecting end, an outlet connecting end and a throttler assembly, the inlet of the throttler assembly is detachably connected with the inlet connecting end, the outlet of the throttler assembly is detachably connected with the outlet connecting end, the throttler assembly comprises at least two groups of throttling holes and mixing chambers, and the throttling holes and the mixing chambers are alternately arranged in the direction from the inlet connecting end to the outlet connecting end; the inner diameter of the throttling hole continuously decreases. The present application solves the low aeration efficiency in the prior art, the gas-liquid mixed flow enters the throttler assembly with multiple groups of throttling holes and mixing chambers through the inlet connecting end, the inner diameter of the multiple groups of throttling holes decreases in sequence to carry out multiple times of pressurization, gas dissolution and pressure reduction, and smaller bubbles such as nanoscale bubbles are obtained, the diameter of the generated bubbles is adjusted by arranging different groups of throttling holes and mixing chambers, and the adding efficiency of ozone and other gases is improved, and energy consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of gas-liquid mixing technology, and more particularly to a bubble generator and an ozone aerator. Background Technology

[0002] Currently, my country's aquaculture industry is developing rapidly, but the lack of scientific and standardized guidance in the aquaculture process results in a large amount of aquaculture wastewater. This wastewater is rich in organic matter such as nitrogen, phosphorus, and potassium, which can cause abnormal algae proliferation, reduce dissolved oxygen in the water, cause the water to turn black and smelly, leading to the suffocation and death of large numbers of fish. The algal toxins secreted by algae can also harm human health through the cumulative effect of the food chain.

[0003] NH3-N and NO3- in aquaculture wastewater - -N, NO2 - The levels of nitrogen (NH3-N) and phosphorus and potassium were both excessive. If these substances are not treated, they will flow into surface water sources through rainwater runoff, thus harming the surrounding aquatic environment. NH3-N exists in both non-ionic and ionic forms. Both forms of ammonia may have some toxicity because NH3 can permeate through most biofilms while NH4+ can... + Almost impossible, therefore NH3 is more toxic than NH4. + This wastewater poses a threat to the health and lives of aquatic organisms. Treatment methods such as water self-purification, regular water changes, phytoremediation, and chemical additives are insufficient to meet surface water quality standards. Therefore, a new treatment method is urgently needed to manage aquaculture wastewater.

[0004] Existing technologies use submersible jet ozone aerators to treat aquaculture wastewater, but the bubble generators used in these aerators have low aeration efficiency and complex structures. Summary of the Invention

[0005] This invention provides a bubble generator and an ozone aerator to solve the defects of low aeration efficiency and complex structure in the prior art. It realizes the adjustment of the diameter of the generated bubbles through multiple sets of throttling orifices and mixing chambers, so that the device can adapt to different working conditions, improve the ozone dosing efficiency and reduce energy consumption.

[0006] The present invention provides a bubble generator, comprising: an inlet connection end, an outlet connection end, and a throttle assembly, wherein the inlet of the throttle assembly is detachably connected to the inlet connection end, and the outlet of the throttle assembly is detachably connected to the outlet connection end. The throttle assembly includes at least two sets of throttle orifices and mixing chambers, wherein the throttle orifices and the mixing chambers are alternately arranged from the inlet connection end to the outlet connection end.

[0007] In particular, the inner diameter of the throttling orifice continuously decreases from the inlet connection end to the outlet connection end.

[0008] According to the bubble generator provided by the present invention, the throttling orifice includes a contraction section and an expansion section. From the inlet connection end toward the expansion section, the inner diameter of the contraction section decreases; from the contraction section toward the outlet connection end, the inner diameter of the expansion section increases.

[0009] According to the bubble generator provided by the present invention, the number of each set of throttling orifices continuously increases from the inlet connection end to the outlet connection end.

[0010] According to the bubble generator provided by the present invention, the throttle assembly includes a first throttle and a second throttle that are detachably connected, wherein the inlet end of the first throttle is detachably connected to the inlet connection end, and the outlet end of the second throttle is detachably connected to the outlet connection end;

[0011] The first throttle includes a first throttle orifice and a first mixing chamber connected in series, and the second throttle includes a second throttle orifice and a second mixing chamber connected in series. The first throttle orifice, the first mixing chamber, the second throttle orifice and the second mixing chamber are connected in series, and the first throttle orifice is proportionally larger than the second throttle orifice.

[0012] According to the bubble generator provided by the present invention, the throttle assembly further includes a third throttle, wherein the inlet end of the third throttle is detachably connected to the outlet end of the second throttle, and the outlet end of the third throttle is detachably connected to the outlet connection end;

[0013] The third throttle includes a third throttle orifice and a third mixing chamber connected together. The third throttle is connected to the second throttle, and the third throttle orifice is proportionally smaller than the second throttle orifice.

[0014] According to the bubble generator provided by the present invention, the number of the second throttling orifices is less than or equal to the number of the third throttling orifices.

[0015] According to the bubble generator provided by the present invention, the inlet connection end includes a first channel and a second channel that are connected, the second channel being connected to the throttle assembly, and the inner diameter of the first channel being larger than the inner diameter of the second channel.

[0016] According to the bubble generator provided by the present invention, the inlet connection end further includes a fourth mixing chamber, the fourth mixing chamber being connected to the second channel, the fourth mixing chamber being connected to the first throttling orifice, the first throttling orifice being connected to the first mixing chamber, the first mixing chamber being connected to the second throttling orifice, the second throttling orifice being connected to the second mixing chamber, and the second mixing chamber being connected to the outlet connection end.

[0017] The present invention also provides an ozone aerator, comprising a water source system, an ozone source system, a premixing component, and the aforementioned bubble generator;

[0018] The water source system is connected to the first inlet of the premixing component, the ozone source system is connected to the second inlet of the premixing component, and the inlet connection of the bubble generator is connected to the outlet of the premixing component.

[0019] The present invention also provides an ozone aerator, wherein the premixing component includes a first channel, a second channel and a third channel that are interconnected, the first channel and the second channel are arranged perpendicularly, the first channel is connected to the first inlet, the second channel is connected to the second inlet, and the third channel is connected to the outlet.

[0020] The bubble generator provided by this invention allows a gas-liquid mixture to enter a throttling device assembly with multiple sets of throttling orifices and mixing chambers through the inlet connection end. The inner diameter of the multiple sets of throttling orifices decreases sequentially to perform multiple pressurization, dissolution, decompression, and gas release processes, resulting in smaller bubbles, such as nanoscale bubbles. By setting different numbers of throttling orifices and mixing chambers, the diameter of the generated bubbles can be adjusted to adapt to different working conditions, thereby improving the dosing efficiency of gases such as ozone and reducing energy consumption.

[0021] Furthermore, the ozone aerator provided by the present invention also possesses the various advantages described above due to the presence of the bubble generator as described above. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in this invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the overall structure of the bubble generator provided by the present invention;

[0024] Figure 2 This is a cross-sectional view of the bubble generator provided by the present invention;

[0025] Figure 3 This is a schematic diagram of the component connections of the ozone aerator provided by the present invention.

[0026] Figure label:

[0027] 100: Throttling device assembly; 101: Inlet connection terminal; 102: Outlet connection terminal; 103: First channel; 104: Second channel; 105: Fourth mixing chamber; 106: Fifth mixing chamber; 110: First throttle; 120: Second throttle; 130: Third throttle; 113: First throttle orifice; 114: First mixing chamber; 121: Second throttle orifice; 122: Second mixing chamber; 131: Third throttle orifice; 132: Third mixing chamber;

[0028] 200: Ozone source system; 201: Oxygen cylinder; 202: Ozone generator; 203: Gas valve; 204: Check valve; 300: Water source system; 301: Water tank; 302: Water pump; 303: Water valve; 400: Premixed component. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this invention. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0030] In the description of the embodiments of the present invention, it should be noted that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of the present invention. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the embodiments of the present invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention based on the specific circumstances.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] The following is combined with Figures 1 to 3 The embodiments of the present invention will be described below. It should be understood that the following description is merely an illustrative embodiment of the present invention and does not constitute a limitation thereof.

[0034] like Figure 1 As shown, the present invention provides a bubble generator, including: an inlet connection end 101, an outlet connection end 102, and a throttle assembly 100. The inlet of the throttle assembly 100 is detachably connected to the inlet connection end 101, and the outlet of the throttle assembly 100 is detachably connected to the outlet connection end 102. The throttle assembly 100 includes at least two sets of throttle orifices and mixing chambers. From the inlet connection end 101 to the outlet connection end 102, the throttle orifices and mixing chambers are alternately arranged. The inner diameter of the throttle orifices decreases continuously from the inlet connection end 101 to the outlet connection end 102.

[0035] During operation, when the gas-liquid mixture enters the throttle assembly 100 through the inlet connection 101, the throttle assembly 100 performs multiple pressurization, dissolution, decompression, and gas release processes on the gas-liquid mixture through multiple sets of throttling orifices and mixing chambers. The further mixed gas-liquid mixture flows out from the outlet connection 102, resulting in smaller bubble diameters, better gas-liquid mixing, and more uniform bubble distribution in the liquid. The throttle assembly 100 is detachably connected to both the inlet connection 101 and the outlet connection 102, facilitating the replacement of different throttle assemblies. Based on the operating conditions, multiple pressurization and decompression processes, such as secondary or tertiary pressurization and decompression, can be selected for the gas-liquid mixture.

[0036] In other words, multiple sets of throttling orifices are arranged in series, with each set including multiple orifices. To put it another way, the gas-liquid mixture first passes through one set of throttling orifices and a mixing chamber, then through another set of throttling orifices and a mixing chamber. The mixing chambers are used for buffering and mixing after pressure release. The micro-nano bubbles ejected from the throttling device assembly 100 have a large surface area, making it easier for the gas in the bubbles to dissolve in water quickly. Due to the small bubble diameter and slow rising speed, the reaction time of the gas in the bubbles in the water is prolonged, for example, allowing the aquaculture wastewater and gas to mix and contact fully, thus improving the purification effect.

[0037] The bubble generator provided by the present invention allows a gas-liquid mixture to enter a throttling device assembly 100 with multiple sets of throttling orifices and mixing chambers through the inlet connection end 101. The inner diameter of the multiple sets of throttling orifices decreases sequentially to perform multiple pressurization, dissolution, decompression, and gas release processes, resulting in smaller bubbles, such as nanoscale bubbles. By setting different numbers of throttling orifices and mixing chambers, the diameter of the generated bubbles can be adjusted to adapt to different working conditions, thereby improving the dosing efficiency of gases such as ozone and reducing energy consumption.

[0038] In one embodiment of the present invention, the throttling orifice includes a contraction section and an expansion section. From the inlet connection end 101 toward the expansion section, the inner diameter of the contraction section decreases; from the contraction section toward the outlet connection end 102, the inner diameter of the expansion section increases.

[0039] In this process, the gas-liquid mixture is compressed and pressurized in the contraction section, and then depressurized and released in the expansion section. The diameter at the connection between the contraction and expansion sections is the inner diameter of the throttling orifice. For the bubble generator, the inner diameter of the throttling orifice continuously decreases along the flow direction of the gas-liquid mixture; that is, the inner diameter of the throttling orifice passing through the gas-liquid mixture later is smaller than that passing through the gas-liquid mixture earlier. In the contraction section, due to the decrease in cross-sectional area, the pressure of the gas-liquid mixture increases, and some bubbles are dissolved in the water. In the expansion section, due to the rapid increase in cross-sectional area, the pressure of the gas-liquid mixture decreases sharply, and the dissolved bubbles precipitate, thus causing the diameter of the dissolved bubbles to continuously decrease.

[0040] like Figure 2 As shown, in another embodiment of the present invention, the number of each set of throttling orifices increases continuously from the inlet connection end 101 to the outlet connection end 102.

[0041] Specifically, multiple throttling orifices are spaced apart in each group, and the number of throttling orifices in each group increases continuously, thereby improving the mixing effect and increasing the volume of gas-liquid mixture processed by the bubble generator per unit time, so as to improve the treatment efficiency of aquaculture wastewater.

[0042] Continue to refer to Figure 1 and Figure 2As shown, in some embodiments of the present invention, the throttle assembly 100 includes a first throttle 110 and a second throttle 120 that are detachably connected. The inlet end of the first throttle 110 is detachably connected to the inlet connection end 101, and the outlet end of the second throttle 120 is detachably connected to the outlet connection end 102. The first throttle 110 includes a first throttle orifice 113 and a first mixing chamber 114 that are connected. The second throttle 120 includes a second throttle orifice 121 and a second mixing chamber 122 that are connected. The first throttle orifice 113, the first mixing chamber 114, the second throttle orifice 121, and the second mixing chamber 122 are connected. The first throttle orifice 113 is proportionally larger than the second throttle orifice 121.

[0043] Specifically, the first throttle 110 and the second throttle 120 in the throttling assembly are detachably connected, for example, by threaded connection, flange connection, or snap-fit. This allows for the adjustment of the ratio of the first throttle orifice 113 in the first throttle 110 to the second throttle orifice 121 in the second throttle 120, based on the actual operating conditions, to achieve the output of bubbles of different diameters. This eliminates the need to replace the entire bubble generator; only combinations of different throttles are required, resulting in a wider range of applications and broader applicability.

[0044] Regarding the first throttling orifice 113 being proportionally larger than the second throttling orifice 121, the first throttling orifice 113 not only has a larger inner diameter than the second throttling orifice 121, but the dimensions of its contraction and expansion sections are also larger than those of the second throttling orifice 121. In other words, the first throttling orifice 113 is proportionally larger than the second throttling orifice 121 overall, meaning the contraction and expansion sections of both are exhibiting the same trend. The multiple first throttling orifices 113 of the first throttling device 110 are all of the same size and evenly distributed, as are the multiple second throttling orifices 121 of the second throttling device 120. For example, the first throttling orifices 113 can be parallel to each other, and can be evenly distributed in concentric circles or at equal intervals within the first throttling device 110.

[0045] Furthermore, in other embodiments of the present invention, the throttle assembly 100 further includes a third throttle 130, the inlet end of the third throttle 130 being detachably connected to the outlet end of the second throttle 120, and the outlet end of the third throttle 130 being detachably connected to the outlet connection end 102; the third throttle 130 includes a communicating third throttle orifice 131 and a third mixing chamber 132, the third throttle 130 being communicating with the second throttle 120, and the third throttle orifice 131 being proportionally smaller than the second throttle orifice 121.

[0046] To further reduce the diameter of air bubbles in the water, a third throttling device 130 can be added after the second throttling device 120. The inner diameter of the third throttling orifice 131 of the third throttling device 130 is smaller than the inner diameter of the second throttling orifice 121. Furthermore, the size of the third throttling orifice 131 is proportionally smaller than the size of the second throttling orifice 121. Therefore, the throttling device assembly 100 may also include a fourth throttling device, a fifth throttling device, etc. The number of first throttling orifices 113 in the first throttling device 110 may be equal to or unequal to the number of second throttling orifices 121 in the second throttling device 120 and the number of third throttling orifices 131 in the third throttling device 130. For example, the ratio of the dimensions of the first throttling orifice 113 to the dimensions of the second throttling orifice 121 to the dimensions of the third throttling orifice 131 is 1:0.5:0.2.

[0047] For example, in an optional embodiment of the present invention, the number of second throttling orifices 121 is less than or equal to the number of third throttling orifices 131. That is, when the size of the third throttling orifice 131 is smaller than the size of the second throttling orifice 121, the number of third throttling orifices 131 is greater than or equal to the number of second throttling orifices 121. For example, the ratio of the number of first throttling orifices 113 to the number of second throttling orifices 121 to the number of third throttling orifices 131 is 6:19:38.

[0048] Continue to refer to Figure 2 In an optional embodiment of the present invention, the inlet connection end 101 includes a first channel 103 and a second channel 104 that are connected together. The second channel 104 is connected to the throttle assembly 100. The inner diameter of the first channel 103 is larger than the inner diameter of the second channel 104.

[0049] In other words, the inlet connection 101 can have a stepped channel to increase the pressure and velocity of the gas-liquid mixture. Of course, a third channel with a larger diameter can also be provided at the front end of the first channel 103.

[0050] In one specific embodiment of the present invention, the inlet connection end 101 further includes a fourth mixing chamber 105, which is connected to the second channel 104, communicates with the first throttling orifice 113, communicates with the first mixing chamber 114, communicates with the second throttling orifice 121, communicates with the second mixing chamber 122, and communicates with the outlet connection end 102.

[0051] The stepped structure of the first channel 103 and the second channel 104, together with the fourth mixing chamber 105, creates a throttling effect, which has a certain pressure boosting and depressurization effect on the gas-liquid mixture, thereby improving the mixing effect of bubbles and liquid.

[0052] Furthermore, the outlet connection 102 may include a fifth mixing chamber 106.

[0053] like Figure 3 As shown, the present invention also provides an ozone aerator, including a water source system 300, an ozone source system 200, a premixing component 400, and a bubble generator as described in the above embodiment; wherein, the water source system 300 is connected to the first inlet of the premixing component 400, the ozone source system 200 is connected to the second inlet of the premixing component 400, and the inlet connection end 101 of the bubble generator is connected to the outlet of the premixing component 400.

[0054] In other words, the liquid in the water source system 300 and the gas in the ozone source system 200 are premixed in the premixing unit 400 to generate a mixed flow containing smaller bubbles and form strong turbulence in the premixing unit 400. After mixing, the mixture passes through a bubble generator, where it is pressurized, dissolved, depressurized, and released to obtain bubbles with even smaller diameters.

[0055] The water source system 300 may include a water tank 301, a high-pressure water pump 302, and a water valve 303. The ozone source system 200 may include an oxygen cylinder 201, an ozone generator 202, a gas valve 203, and a one-way valve 204. The outlet of the oxygen cylinder 201 is connected to the ozone generator 202. The outlet of the ozone generator 202 is connected to the gas valve 203. The outlet of the gas valve 203 is connected to the one-way valve 204. The outlet of the one-way valve 204 is connected to a premixing component 400. The inlet of the water pump 302 is connected to the water tank 301. The outlet of the water pump 302 is connected to the water valve 303. The outlet of the water valve 303 is connected to the premixing component 400. The outlet of the premixing component 400 is connected to a bubble generator. The outlet of the bubble generator is directly connected to the outside environment or the water tank 301.

[0056] Specifically, in some optional embodiments of the present invention, the premixing component 400 includes a first channel 103, a second channel 104, and a third channel that are interconnected. The first channel 103 and the second channel 104 are arranged perpendicularly. The first channel 103 is connected to a first inlet, the second channel 104 is connected to a second inlet, and the third channel is connected to an outlet. For example, the premixing component 400 is a three-way valve.

[0057] The gas phase flow of the ozone source system 200 and the liquid phase flow of the water source system 300 undergo a shearing effect in the T-type premixer 400, generating a mixed flow containing smaller ozone bubbles and forming strong turbulence in the pipe, which effectively increases the turbulence of the jet and reduces the particle size of the ozone bubbles.

[0058] Work process:

[0059] When powered on, water pump 302 starts, and water is drawn in from the bottom of the pump. The impeller in pump 302 rotates at high speed, giving the water potential energy, and it is rapidly ejected from the outlet of pump 302. The effluent then enters the first inlet of premixing unit 400 through water valve 303. Ozone generator 202 starts, and the valve of oxygen cylinder 201 opens, allowing oxygen to enter the ozone generator 202. The ozone generator 202 converts the oxygen into ozone, which is then ejected from the generator. The ozone then enters the one-way valve 204 through gas valve 203, and finally enters the second inlet of premixing unit 400 through one-way valve 204. By adjusting gas valve 203 and water valve 303, the gas-liquid mixing ratio is adjusted to optimize the shear effect in premixing unit 400, generating a mixed flow containing ozone-containing bubbles, which is ejected from the outlet of premixing unit 400.

[0060] Finally, when the mixed flow containing smaller ozone bubbles passes through the bubble generator, the mixed flow first enters the fourth mixing chamber 105 through the inlet connection 101; then enters the first throttling orifice 113 through the fourth mixing chamber 105; then reaches the first mixing chamber 114 through the first throttling orifice 113; then enters the second throttling orifice 121 through the first mixing chamber 114; then reaches the second mixing chamber 122 through the second throttling orifice 121; and finally enters the third throttling orifice 131 through the second mixing chamber 122. The bubbles are pressurized, depressurized, subjected to high-speed shearing, strong turbulence, and mixed through the first, second, and third throttling devices to form industrial-grade micro-nano bubbles, which reach the fifth mixing chamber 106 at the outlet connection 102, and are finally ejected from the outlet connection 102 of the bubble generator. This process stirs, oxygenates, oxidizes, sterilizes, and removes organic matter from the aquaculture wastewater. The micro-nano bubbles have a large surface area, making it easier for the ozone in the bubbles to dissolve in the water quickly. Due to the small bubble diameter and slow rising speed, the reaction time of the ozone in the bubbles in the water is prolonged, allowing the aquaculture wastewater and ozone to fully mix and react.

[0061] The ozone aerator boasts high oxygenation efficiency, high ozone utilization rate, low energy consumption, and a simple structure. It improves oxygenation efficiency by premixing ozone and water using a T-shaped premixing element 400 to obtain a mixed flow containing ozone-containing bubbles. Furthermore, the T-shaped premixing element 400 generates this mixed flow, and a bubble generator performs multiple cavitation processes to produce ozone-containing micro / nano bubbles, further enhancing ozone utilization. Compared to existing technologies, the bubble generator in this application eliminates the need for large dissolved air tanks and high-power air compressors, requiring only a water pump 302 to generate the micro / nano bubbles, thus reducing energy consumption and simplifying the ozone aerator's structure.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A bubble generator, characterized in that, include: The system comprises an inlet connection, an outlet connection, and a throttle assembly. The inlet of the throttle assembly is detachably connected to the inlet connection, and the outlet of the throttle assembly is detachably connected to the outlet connection. The throttle assembly includes at least two throttles, each including a communicating throttle orifice and a mixing chamber. The throttle orifice and the mixing chamber are alternately arranged from the inlet connection to the outlet connection. The inlet of the first throttle is detachably connected to the inlet connection, and the outlet of the last throttle is detachably connected to the outlet connection. The inlet of the subsequent throttle is detachably connected to the outlet of the preceding throttle. In particular, from the inlet connection end to the outlet connection end, the inner diameter of the throttling orifice of all the throttling devices continuously decreases.

2. The bubble generator according to claim 1, characterized in that, The throttling orifice includes a contraction section and an expansion section. From the inlet connection end toward the expansion section, the inner diameter of the contraction section decreases; from the contraction section toward the outlet connection end, the inner diameter of the expansion section increases.

3. The bubble generator according to claim 1, characterized in that, The number of throttling orifices in each group increases continuously from the inlet connection end to the outlet connection end.

4. The bubble generator according to any one of claims 1 to 3, characterized in that, The throttle assembly includes a first throttle and a second throttle that are detachably connected. The inlet end of the first throttle is detachably connected to the inlet connection end, and the outlet end of the second throttle is detachably connected to the outlet connection end. The first throttle includes a first throttle orifice and a first mixing chamber connected in series, and the second throttle includes a second throttle orifice and a second mixing chamber connected in series. The first throttle orifice, the first mixing chamber, the second throttle orifice and the second mixing chamber are connected in series, and the first throttle orifice is proportionally larger than the second throttle orifice.

5. The bubble generator according to claim 4, characterized in that, The throttle assembly further includes a third throttle, the inlet end of which is detachably connected to the outlet end of the second throttle, and the outlet end of the third throttle is detachably connected to the outlet connection end; The third throttle includes a third throttle orifice and a third mixing chamber connected together. The third throttle is connected to the second throttle, and the third throttle orifice is proportionally smaller than the second throttle orifice.

6. The bubble generator according to claim 5, characterized in that, The number of the second throttling orifice is less than or equal to the number of the third throttling orifice.

7. The bubble generator according to claim 4, characterized in that, The inlet connection includes a first channel and a second channel that are connected together. The second channel is connected to the throttle assembly. The inner diameter of the first channel is larger than the inner diameter of the second channel.

8. The bubble generator according to claim 7, characterized in that, The inlet connection also includes a fourth mixing chamber, which is connected to the second channel, and is in communication with the first throttling orifice. The first throttling orifice is in communication with the first mixing chamber, the first mixing chamber is in communication with the second throttling orifice, the second throttling orifice is in communication with the second mixing chamber, and the second mixing chamber is connected to the outlet connection.

9. An ozone aerator, characterized in that, Includes a water source system, an ozone source system, a premixing component, and a bubble generator according to any one of claims 1 to 8; The water source system is connected to the first inlet of the premixing component, the ozone source system is connected to the second inlet of the premixing component, and the inlet connection of the bubble generator is connected to the outlet of the premixing component.

10. The ozone aerator according to claim 9, characterized in that, The premixed component includes a first channel, a second channel, and a third channel that are interconnected. The first channel is perpendicular to the second channel. The first channel is connected to the first inlet, the second channel is connected to the second inlet, and the third channel is connected to the outlet.

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