Dual cavitation nozzle based on helmholtz resonance and venturi effect and applications

Abstract

The application discloses a double cavitation nozzle based on Helmholtz resonance and Venturi effect and application, wherein the double cavitation nozzle comprises a first nozzle body 2 and a second nozzle body 3, the first nozzle body 2 generates bubbles through cavitation of water flow by Venturi effect, and the second nozzle body 3 generates bubbles through cavitation of water flow by self-oscillation of Helmholtz resonance principle, and a large number of bubbles can be generated through double cavitation of water flow after combined installation of the first nozzle body 2 and the second nozzle body 3, so that the cleaning effect can be better achieved.

Description

Technical Field

[0001] This invention relates to the field of liquid nozzles, and more particularly to a dual cavitation nozzle based on Helmholtz resonance and Venturi effect and its application. Background Technology

[0002] Most commercially available oral irrigators use pulsed water flow. To achieve higher cleaning efficiency and a gentler rinsing experience, cavitation structures have gradually been incorporated into their designs. Cavitation here refers to the process by which water nuclei grow into bubbles when the local pressure in the flow channel drops to a critical pressure (generally close to the vaporization pressure). The accumulation, flow, splitting, and collapse of these bubbles are collectively referred to as the overall process. The energy generated by the bursting of cavitation bubbles can effectively remove plaque.

[0003] Existing cavitation structure designs still have some shortcomings, such as: the structure is not easy to adjust (especially not easy to adjust according to the user's habits and needs), multiple pipelines are required for gas supply, liquid supply or supply of different liquid flow, and high manufacturing requirements. Summary of the Invention

[0004] One objective of this invention is to provide a nozzle that cavitates water flow to improve the cleaning ability of water flow;

[0005] A second objective of this invention is to provide a dental flosser that, in conjunction with a cavitation nozzle, enhances the ability to remove plaque from teeth in the oral cavity.

[0006] A third objective of this invention is to provide a widely applicable nozzle to improve the cleaning capabilities of cleaning equipment.

[0007] To achieve one objective, this invention provides a dual cavitation nozzle based on Helmholtz resonance and Venturi effect, characterized in that it comprises:

[0008] The first nozzle body has a first nozzle inlet and a first nozzle outlet at its two ends, and the first nozzle body also has an elastic pipe connecting the first nozzle inlet and the first nozzle outlet. The first nozzle body is also provided with a Venturi adjustment mechanism, which can adjustably shrink the diameter of the elastic pipe to form a Venturi effect.

[0009] The second nozzle body has an elastic resonant element inside. The second nozzle body has a second nozzle inlet and a second nozzle outlet. A Helmholtz resonant chamber is formed between the elastic resonant element and the second nozzle inlet. A first water passage hole is opened on the elastic resonant element, and the first water passage hole is connected to the second nozzle outlet.

[0010] The first nozzle body and the second nozzle body are assembled together.

[0011] Preferably, the Venturi adjustment mechanism includes an adjustment base, multiple blades, and a drive ring. The adjustment base has a first mounting port that mates with the first nozzle body. Multiple first rotation points are provided on the adjustment base surrounding the first mounting port. One end of each of the multiple blades is respectively mounted on one of the multiple first rotation points, and clockwise / counterclockwise rotation is used to open / close the other end of the blades. The drive ring has a second mounting port that mates with the first nozzle body. Multiple first drive points are provided on the drive ring surrounding the second mounting port. The other end of each of the multiple blades is respectively mounted on one of the multiple first drive points, and clockwise / counterclockwise rotation of the drive ring is used to drive clockwise / counterclockwise rotation of the multiple blades. The elastic pipe is located within the enclosed space of the multiple blades, and its diameter is adjusted by the opening / closing of the multiple blades, thereby regulating the Venturi effect and cavitation of the water flow.

[0012] Preferably, the venturi adjustment mechanism further includes a limiting component that locks / unlocks the relative position between the drive ring and the adjustment base.

[0013] Preferably, the first rotation point is a first rotation shaft, and the blade is provided with a first rotation hole, which is installed on the first rotation shaft; or, the first rotation point is a first rotation hole, and the blade is provided with a first rotation shaft, which is inserted into the first rotation hole.

[0014] Preferably, the first driving point is a first driving shaft, and the blade is provided with a first strip hole, which is installed on the first driving shaft; or, the first driving point is a first strip hole, and the blade is provided with a first driving shaft, which is inserted into the first strip hole.

[0015] Preferably, the elastic resonator is conical, the first water passage is located at the bottom of the conical elastic resonator, and one or more bends are provided on the side of the conical elastic resonator. An angle α is formed between the side wall of the Helmholtz resonant chamber and the corner of the bend.

[0016] Preferably, the second nozzle body is further provided with a second nozzle head, the second nozzle head including at least a spray rod, the spray rod having a second water passage hole through it along the axial direction, the outer periphery of the spray rod having a first thread along the length of the rod, the inner wall of the water outlet of the second nozzle having a second thread adapted to the first thread, the spray rod being adjustablely inserted into the second nozzle body through the first thread and the second thread, the bottom of the spray rod being connected to the elastic resonant element, the second water passage hole communicating with the first water passage hole, and the angle α being indirectly adjusted by the insertion depth of the spray rod.

[0017] Preferably, it also includes a fixing tube, which is adapted to be installed at the bottom of the spray bar. The bottom of the conical elastic resonator is clamped and fixed between the fixing tube and the spray bar, and the position of the second water passage hole is connected to the first water passage hole.

[0018] Preferably, the second nozzle body includes a cylindrical second nozzle base and a second nozzle top cover, the second nozzle inlet is located on the second nozzle base, and the second nozzle outlet is located on the second nozzle top cover; a guide block is provided on the cylindrical wall of the second nozzle top cover, and a guide groove is provided on the cylindrical wall of the second nozzle base; the second nozzle top cover is guided by the guide block and screwed into the guide groove to be installed on the second nozzle base.

[0019] Preferably, the guide groove includes at least a first guide groove body and a second guide groove body, wherein the first guide groove body and the second guide groove body are positioned at different heights on the second nozzle base.

[0020] Preferably, the top of the elastic resonator is clamped and fixed between the second nozzle base and the second nozzle top cover; or, the top of the elastic resonator is fixed to the second nozzle top cover.

[0021] Preferably, when the first nozzle outlet of the first nozzle body is assembled and installed on the second nozzle inlet of the second nozzle body, one end of the elastic pipe is connected to the first nozzle outlet of the first nozzle body, and the other end is connected to the second nozzle inlet of the second nozzle base in the second nozzle body.

[0022] Preferably, when the second nozzle outlet of the second nozzle body is assembled and installed at the first nozzle inlet of the first nozzle body; a first nozzle is provided on the first nozzle outlet of the first nozzle body, the elastic pipe is installed and connected between the first nozzle body and the first nozzle, and the second nozzle outlet of the second nozzle top cover of the second nozzle body is installed and connected to the first nozzle inlet of the first nozzle body.

[0023] The above technical solutions, individually or in combination, exhibit the following beneficial effects:

[0024] This solution utilizes the Venturi effect and the Helmholtz resonance principle to achieve dual cavitation of water flow, and the degree of Venturi effect and Helmholtz resonance can be adjusted in combination to meet the needs of different users.

[0025] The diameter of the elastic pipe is adjusted by controlling the degree of enclosure of multiple blades in the first nozzle body, thereby achieving different degrees of cavitation of the water flow according to the degree of flow velocity change of the Venturi effect, thus providing nozzle users with a variety of choices.

[0026] The Venturi regulating mechanism is located outside the flexible pipe and does not come into contact with the water circuit. It is simple and convenient to install and adjust, and it is also cleaner without affecting the internal water circuit.

[0027] The Helmholtz resonant chamber is formed in the body of the second nozzle through an elastic resonant element. After the water flows into the Helmholtz resonant chamber from the second nozzle inlet of the body of the second nozzle, it impacts the elastic resonant element. The oscillation frequency of the elastic resonant element generates resonance, which can greatly excite the Helmholtz resonant chamber to vibrate and cause the gas in the water to be squeezed and impacted to form bubbles, which are then sprayed out from the second nozzle, generating a large amount of foam to improve the cleaning effect.

[0028] The resonance parameters within the Helmholtz resonant chamber mainly include the angle α of the water flow impacting the elastic resonator, the length L of the Helmholtz resonant chamber, and the oscillation frequency f of the elastic resonator. The oscillation frequency f can be adjusted by the deformation of the elastic resonator caused by the insertion depth of the spray bar. Furthermore, as the conical elastic resonator is elongated, the angle α of the water flow impacting the elastic resonator can also be adjusted. The relative distance between the second nozzle base and the second nozzle top cover can be adjusted by using different guide grooves, thereby adjusting the length L of the Helmholtz resonant chamber. By combining these three adjustments, the optimal resonance effect can be achieved.

[0029] To address these two objectives, the present invention provides a dual cavitation water flosser based on Helmholtz resonance and Venturi effect, characterized in that it includes a water flosser body and the aforementioned dual cavitation nozzle based on Helmholtz resonance and Venturi effect; the dual cavitation nozzle based on Helmholtz resonance and Venturi effect is installed on the water outlet pipe of the water flosser body.

[0030] The beneficial effects of adopting the above technical solutions are as follows:

[0031] By installing a dual cavitation nozzle with Helmholtz resonance and Venturi effect on the water outlet pipe of the oral irrigator body, the water flow of the oral irrigator can form a dual cavitation effect, and the cavitation effect can be combined and adjusted to generate a large number of bubbles, thereby better removing dental plaque and cleaning the oral cavity.

[0032] To achieve its three objectives, this invention introduces the application of a dual cavitation nozzle based on Helmholtz resonance and Venturi effect in cleaning equipment. The invention is characterized in that the dual cavitation nozzle based on Helmholtz resonance and Venturi effect is installed in the spray pipeline of the cleaning equipment, which includes, but is not limited to, car wash equipment and atomizing equipment.

[0033] The beneficial effects of adopting the above technical solutions are as follows:

[0034] Taking car wash equipment as an example, after installing a dual cavitation nozzle based on Helmholtz resonance and Venturi effect, when spraying water and cleaning foam on the car body, the dual cavitation liquid can generate foam better, making the foam richer and more conducive to cleaning the car; similarly, the atomizing equipment can make the atomization more uniform and the atomization effect better by cavitating the liquid through the nozzle. Attached Figure Description

[0035] Figure 1 This diagram illustrates the structure of the first type of dual cavitation nozzle in this invention installed in the water outlet pipeline.

[0036] Figure 2 It expresses Figure 1 Cross-sectional view at point AA.

[0037] Figure 3 It expresses Figure 2 Enlarged view of the middle section.

[0038] Figure 4 It expresses Figure 3 A diagram showing the state of the flexible pipe diameter adjusted by the Chinese-language regulating mechanism.

[0039] Figure 5 The diagram shows an exploded view of the structure of the first type of dual cavitation nozzle in this invention installed in the water outlet pipeline.

[0040] Figure 6 An exploded view of the structure of the second nozzle body in this invention is shown.

[0041] Figure 7 An exploded view of the structure of the first nozzle body in this invention is shown.

[0042] Figure 8 This diagram illustrates the structure of the second type of dual cavitation nozzle in this invention.

[0043] Figure 9 It expresses Figure 8 Cross-sectional view at point BB.

[0044] Figure 10 An exploded view of the structure of the second dual cavitation nozzle in this invention is shown.

[0045] Figure 11 This diagram illustrates the blade structure of the Chinese Tully adjustment mechanism of the present invention.

[0046] Figure 12 The diagram illustrates the structure of the dual cavitation oral irrigator of the present invention.

[0047] in:

[0048]

[0049] Detailed Implementation

[0050] The preferred embodiments described below are merely examples, and other obvious variations will be apparent to those skilled in the art. The basic principles of the invention defined in the following description can be applied to other embodiments, modifications, improvements, equivalents, and other technical solutions that do not depart from the spirit and scope of the invention.

[0051] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "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 this 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, the above terms should not be construed as limiting this invention.

[0052] Example 1:

[0053] Please see Figures 1 to 7 and combined Figure 11 This embodiment provides a dual cavitation nozzle based on Helmholtz resonance and Venturi effect. It excites and oscillates water flow based on the Helmholtz resonance principle, and further uses the Venturi effect to form a negative pressure zone according to the water pressure change to precipitate gas in the water flow. The gas in the water flow is cavitated by dual action to form bubbles, thereby enriching the bubbles in the water flow to achieve a better cleaning effect.

[0054] The dual cavitation nozzle includes a first nozzle body 2 and a second nozzle body 3. The Venturi effect is realized in the first nozzle body 2, and the Helmholtz resonance effect is realized in the second nozzle body 3.

[0055] For specific details, please refer to... Figure 5The first nozzle body 2 has a first nozzle inlet 211 and a first nozzle outlet 212 at its two ends, respectively. The first nozzle body 2 also has an elastic pipe 22 connecting the first nozzle inlet 211 and the first nozzle outlet 212. A Venturi adjustment mechanism 23 is also provided on the first nozzle body 2, which adjustably contracts the diameter of the elastic pipe 22 to create a Venturi effect. The second nozzle body 3 has an elastic resonant element 32, with a second nozzle inlet 311 and a second nozzle outlet 341. The elastic resonant element 32 is located inside the second nozzle body 3, forming a Helmholtz resonance chamber 312 between the elastic resonant element 32 and the second nozzle inlet 311. A first water passage hole 321 is opened on the elastic resonant element 32, which communicates with the second nozzle outlet 341. Furthermore, the first nozzle body 2 and the second nozzle body 3 are assembled together.

[0056] The combination and installation method of the first nozzle body 2 and the second nozzle body 3 is not limited. Specifically, there are two types:

[0057] The first type: The first nozzle outlet 212 of the first nozzle body 2 is assembled and installed on the second nozzle inlet 311 of the second nozzle body 3;

[0058] The second type: The second nozzle outlet 341 of the second nozzle body 3 is assembled and installed on the first nozzle inlet 211 of the first nozzle body 2.

[0059] Please see Figures 1 to 7 and in conjunction with the appendix Figure 11 The first structural form is described in detail below:

[0060] The first nozzle body 2 mainly generates the Venturi effect by adjusting the pipe diameter at certain locations of the first nozzle body 2 through the Venturi adjustment mechanism 23, thereby accelerating the flow velocity. Specifically, the Venturi adjustment mechanism 23 adjusts the pipe diameter of the elastic pipe 22 to regulate the Venturi effect and achieve cavitation of the water flow.

[0061] Combination Figure 4 and Figure 5The specific principle is that the first nozzle body 2, the elastic pipe 22, and the second nozzle body 3 connected to the elastic pipe 22 form a Venturi tube. The working principle of the Venturi tube is to narrow the fluid (the elastic pipe 22 narrows its diameter), so that the liquid forms a low-pressure zone at the narrowing point of the Venturi tube (at this time, it is static pressure, which is the pressure of the fluid on the pipe wall). When the pressure is lower than the saturated vapor pressure, the gas carried in the liquid will be released to form bubbles, achieving the effect of water cavitation. At the same time, the axial velocity at the narrowing point of the Venturi tube increases, and the liquid is in a low-velocity zone near the wall at the rear end of the Venturi tube outlet. The velocity difference strengthens the shearing action between the liquids, forming multiple vortices. The negative pressure zone at the center of the vortex also facilitates the formation of bubbles.

[0062] The Venturi adjustment mechanism 23 controls the diameter of the elastic conduit 22. It can be selected as an adjustable clamp or a mechanical iris mechanism, or other components capable of adjusting the tension. In this embodiment, a mechanical iris mechanism is described in detail with reference to the accompanying drawings.

[0063] Specifically, the Venturi regulating mechanism 23 (mechanical iris mechanism) includes an regulating base 231, multiple blades 232, and a drive ring 233. The regulating base 231 has a first mounting port that is installed to cooperate with the first nozzle body 2. Multiple first rotation points are provided on the regulating base 231 surrounding the first mounting port. One end of each of the multiple blades 232 is respectively installed at the multiple first rotation points, and the other end is opened / closed by clockwise / counterclockwise rotation. The drive ring 233 has a second mounting port that is installed to cooperate with the first nozzle body 2. Multiple first drive points are provided on the drive ring 233 surrounding the second mounting port. One end of each of the multiple blades 232 is respectively installed at the multiple first drive points, and the clockwise / counterclockwise rotation of the drive ring 233 is linked to the clockwise / counterclockwise rotation of the multiple blades 232. The elastic pipe 22 is located within the enclosed space of the multiple blades 232 and its diameter is adjusted by the opening / closing of the multiple blades 232, thereby regulating the Venturi effect and cavitation water flow.

[0064] The blade 232 has an arc-shaped plate structure. When closed, it forms a concentric ring structure. The inner ring has the smallest aperture. As multiple blades 232 open, the shape of the inner ring gradually changes and the enclosed space gradually increases, thereby achieving the adjustment of the venturi tube diameter.

[0065] Please combine Figure 5 and Figure 11 There are two implementation methods for mounting the blade 232 and the adjusting base 231 through the first rotation point:

[0066] 1. The first rotation point is the first rotation shaft 2321, and the blade 232 is provided with a first rotation hole 2311, which is installed on the first rotation shaft 2321;

[0067] 2. The first rotation point is the first rotation hole 2311. The blade 232 is provided with a first rotation shaft 2321. The first rotation shaft 2321 is inserted and installed in the first rotation hole 2311. This embodiment adopts this implementation method.

[0068] Please combine Figure 5 and Figure 11 There are two implementation methods for mounting the blade 232 and the drive ring 233 through the first drive point:

[0069] 1. The first driving point is the first driving shaft 2322, and the blade 232 is provided with a first strip hole 2331, which is installed on the first driving shaft 2322;

[0070] 2. The first driving point is the first strip hole 2331, and the blade 232 is provided with a first driving shaft 2322. The first driving shaft 2322 is inserted and installed on the first strip hole 2331. This embodiment adopts this implementation method.

[0071] To ensure stable installation of the Venturi adjustment mechanism 23, the Venturi adjustment mechanism 23 also includes an upper cover 234, which is installed on the adjustment base 231, forming an adjustment port between the upper cover 234 and the adjustment base 231. Specifically, the adjustment base 231 is a cylindrical structure, with the adjustment port located on the side of the cylindrical structure. The inner wall of the cylindrical structure is threaded, and the upper cover 234 has a threaded structure that matches the thread on the inner wall of the cylindrical structure, allowing the upper cover 234 and the adjustment base 231 to be detachably installed via the threads. It should be noted that the installation method between the upper cover 234 and the adjustment base 231 is not limited to this; other fixing connection methods are also possible, such as ultrasonic connection, bonding, and welding if the material is metal.

[0072] Furthermore, the Venturi adjustment mechanism 23 also includes a bottom cover 235, which is located at the bottom of the adjustment base 231. The top cover 234 and the bottom cover 235 stabilize the installation of components such as the adjustment base 231, the drive ring 233, and the blade 232.

[0073] In this embodiment, the first nozzle body 2 consists of two pipes with different diameters. The pipe with the smaller diameter passes through the first mounting port and connects to the water outlet pipe 1, while the pipe with the larger diameter abuts against and is fixed to the adjusting base 231. It should be noted that in this embodiment, the first nozzle body 2 consists of two pipes with different diameters, which is one implementation option for adapting the installation of the water outlet pipe. It is not a limiting requirement of this embodiment. Alternatively, the first nozzle body 2 can be formed by a single pipe of equal diameter, depending on the actual implementation.

[0074] To further facilitate the rotation of the blade 232 by the drive ring 233, an adjustment handle 243 is provided on the drive ring 233. The adjustment handle 243 is located at the adjustment port and extends outward. Preferably, the drive ring 233 is a concentric ring structure, and the adjustment handle 243 is located on the side of the concentric ring structure.

[0075] Under normal circumstances, the water flow will affect the elastic pipe 22 and generate a force perpendicular to the drive ring 233. The effect on the horizontal direction of the drive ring 233 is small. Therefore, it is only necessary to adjust the degree of enclosure between the multiple blades 232 by rotating the drive ring 233 by adjusting the handle 243.

[0076] To further define the large-diameter and small-diameter states of the multiple blades 232 enclosing the tubes, the Venturi adjustment mechanism 23 also includes a limiting component 24. The limiting component 24 includes at least a first elastic protrusion 241a, a second elastic protrusion 241c, and a limiting groove 2431. The first elastic protrusion 241a and the second elastic protrusion 241c are disposed on the adjusting base 231, and the limiting groove 2431 is disposed on the side of the adjusting handle 243 facing the adjusting base 231. The position of the first elastic protrusion 241a is defined as the location where the blade 232 encloses a large-diameter enclosed space when the limiting groove 2431 is engaged with the first elastic protrusion 241a, that is, when the limiting groove 2431 is engaged with the first elastic protrusion 241a, the blade 232 encloses a large-diameter state; the position of the second elastic protrusion 241c is defined as the location where the blade 232 encloses a small-diameter enclosed space when the limiting groove 2431 is engaged with the second elastic protrusion 241c, that is, when the limiting groove 2431 is engaged with the second elastic protrusion 241c, the blade 232 encloses a small-diameter state.

[0077] Specifically, the first elastic protrusion 241a is mounted on the adjusting base 231 via the first spring 242a. The adjusting base 231 has a first mounting groove, and the first elastic protrusion 241a is mounted in the first mounting groove via the first spring 242a. Similarly, the second elastic protrusion 241c is mounted on the adjusting base 231 via the second spring 242c. The adjusting base 231 has a second mounting groove, and the second elastic protrusion 241c is mounted in the second mounting groove via the second spring 242c.

[0078] Furthermore, the limiting groove 2431 is a guide groove provided on the adjusting handle 243, and the limiting component 24 also includes a plug 244, which is inserted into the guide groove. When the limiting groove 2431 needs to be used, the plug 244 is pulled out or pulled open to expose the guide groove.

[0079] To increase the number of adjustable diameter settings, the limiting component 24 may also include a third elastic protrusion 241b. The third elastic protrusion 241b is disposed on the adjusting base 231. The position of the third elastic protrusion 241b is defined as the space where the blade 232 encloses the middle diameter when the limiting groove 2431 is engaged with the third elastic protrusion 241b, that is, when the limiting groove 2431 is engaged with the third elastic protrusion 241b, the blade 232 is in the middle diameter state.

[0080] Specifically, the third elastic protrusion 241b is mounted on the adjusting base 231 via the third spring 242b. The adjusting base 231 has a third mounting groove, and the third elastic protrusion 241b is mounted in the third mounting groove via the third spring 242b.

[0081] It should be noted that the terms "large", "medium", and "small" in this embodiment refer to the relative size of the enclosed space between the blades 232, and are not absolute concepts. Those skilled in the art should understand this.

[0082] In this embodiment, the first nozzle body 2 has a first nozzle inlet 211 and a first nozzle outlet 212 at both ends. The first nozzle inlet 211 is used for water intake and is connected to the external water outlet pipe 1. The first nozzle outlet 212 is connected to the second nozzle body 3 through an elastic pipe 22.

[0083] Please combine Figure 6 The second nozzle body 3 achieves second-stage water cavitation through Helmholtz resonance. An elastic resonant element 32 is disposed inside the second nozzle body 3. A Helmholtz resonance chamber 312 is formed between the elastic resonant element 32 and the water inlet 311 of the second nozzle. A first water passage hole 321 is provided on the elastic resonant element 32. When the water flow from the water inlet 311 of the second nozzle enters the Helmholtz resonance chamber 312 and impacts the elastic resonant element 32, resonance is generated, thereby increasing the self-excited oscillation of the water flow, causing the air bubbles in the water flow to be squeezed out by the oscillation, forming abundant foam.

[0084] In this embodiment, the second nozzle body 3 serves as the final jet body, so the second nozzle body 3 is provided with a second nozzle 33. The second nozzle 33 is installed at the second nozzle outlet 341, and the second nozzle 33 has a second water passage 333. When the second water passage 333 is connected to the first water passage 321 on the elastic resonant member 32, the water flow with abundant bubbles after being vibrated by the Helmholtz resonant chamber 312 is ejected from the second nozzle 33.

[0085] Specifically, a Helmholtz resonance chamber 312 is formed between the elastic resonator 32 and the second nozzle body 3. One end of this chamber is connected to the second nozzle inlet 311 for easy water intake, and the other end is connected to the second water passage 333 for easy water outlet. To better form this chamber, the elastic resonator 32 is conical, with the first water passage 321 located at the bottom of the conical elastic resonator 32. An angle α is formed between the side of the conical elastic resonator 32 and the side wall of the Helmholtz resonance chamber 312. Furthermore, to increase the impact area between the water flow and the conical elastic resonator 32, the side of the conical elastic resonator 32 is stepped. Preferably, the conical elastic resonator 32 is specifically an inverted cone shape, with the cone tip facing the second nozzle inlet 311.

[0086] In this embodiment, the second nozzle 33 is used to communicate with and spray water from the Helmholtz resonant chamber 312. The resonance effect of the Helmholtz resonant chamber 312 mainly depends on the angle α of the water flow impacting the elastic resonator 32, the length L of the Helmholtz resonant chamber 312, and the oscillation frequency f of the elastic resonator 32. These parameters are adjusted in conjunction with the various components below.

[0087] Furthermore, the second nozzle 33 includes at least one spray bar, which has a second water passage hole 333 extending through it along the axial direction. The outer periphery of the spray bar has a first thread 334 along its length. The inner wall of the second nozzle outlet 341 has a second thread 3411 that matches the first thread 334. The spray bar can be inserted into the second nozzle body 3 in an adjustable manner through the first thread 334 and the second thread 3411. The bottom of the spray bar is connected to the elastic resonator 32. The second water passage hole 333 communicates with the first water passage hole 321. The angle α is indirectly adjusted by the insertion depth of the spray bar. Specifically, taking one threaded implementation as an example, the following description is provided: When the spray bar rotates clockwise, it slowly extends into the interior of the second nozzle base 31, simultaneously pressing against the elastic resonator 32 facing the water inlet 311 of the second nozzle, causing it to deform and lengthen. At the same time, the angle α between the elastic resonator 32 and the inner wall of the cavity decreases. Since the elastic resonator 32 has deformed, its oscillation frequency f has also changed, causing the oscillation frequency of the water flow impacting the elastic resonator 32 to also change. When it approaches the natural frequency of the elastic resonator 32, a resonance effect occurs, greatly improving the self-excited oscillation effect of the water flow.

[0088] Furthermore, the second nozzle body 3 includes a cylindrical second nozzle base 31 and a second nozzle top cover 34. A guide block 342 is provided on the cylindrical wall of the second nozzle top cover 34, the second nozzle outlet 341 is provided on the second nozzle top cover 34, the second nozzle inlet 311 is provided on the second nozzle base 31, and a guide groove is provided on the cylindrical wall of the second nozzle base 31. The second nozzle top cover 34 is guided by the guide block 342 and screwed into the guide groove to be installed on the second nozzle base 31.

[0089] Specifically, the guide groove includes at least a first guide groove body 3141 and a second guide groove body 3142, and the first guide groove body 3141 and the second guide groove body 3142 are positioned at different heights on the second nozzle base 31.

[0090] like Figure 6 As shown, the cylindrical second nozzle base 31 and the second nozzle top cover 34 are connected by an internal and external insertion method. The guide block 342 and the guide groove restrict their axial separation. Specifically, the guide block 342 is provided on the outer side of the cylindrical wall of the second nozzle top cover 34; while the inner side of the cylindrical wall of the second nozzle base 31 has at least two or more guide grooves of different depths. Specifically, the guide grooves are generally L-shaped. The guide block 342 is first aligned and inserted downwards, then laterally guided and fixed. For example, the guide block 342 is aligned with the L-shaped opening of the first guide groove 3141, inserted downwards into the first guide groove 3141, and then the knob is turned horizontally to complete the installation of the second nozzle base 31 and the second nozzle top cover 34; or, the guide block 342 is aligned with the L-shaped opening of the second guide groove 3142 at a deeper position, inserted downwards into the second guide groove 3142, and then the knob is turned horizontally to complete the installation of the second nozzle base 31 and the second nozzle top cover 34.

[0091] By installing the second nozzle base 31 and the second nozzle top cover 34 at different engagement depths, the depth L of the Helmholtz resonance chamber 312 between the elastic resonator 32 and the second nozzle base 31 can also be adjusted, as follows:

[0092] Please combine Figure 4 and Figure 6 The top of the elastic resonator 32 is clamped and fixed between the second nozzle base 31 and the second nozzle top cover 34; or, the top of the elastic resonator 32 is fixed to the second nozzle top cover 34. Therefore, when the engagement position between the second nozzle base 31 and the second nozzle top cover 34 is different, the position of the elastic resonator 32 is also different. Since the cavity height inside the second nozzle base 31 is constant, the relative height L between the elastic resonator 32 and the second nozzle base 31 will be different, that is, the height of the Helmholtz resonant chamber 312 will change.

[0093] To facilitate the fixed connection between the spray bar and the elastic resonator 32, a fixing tube 332 is provided. This fixing tube 332 is adapted to be installed at the bottom of the spray bar. The bottom of the inverted conical elastic resonator 32 is clamped and fixed between the fixing tube 332 and the spray bar. The position of the second water passage 333 corresponds to the connection with the first water passage 321. That is, both the fixing tube 332 and the spray bar are rigid, non-deformable structures, and the inverted conical elastic resonator 32 can be fixed by compression.

[0094] In this embodiment, the elastic resonator 32 is made of elastic rubber material.

[0095] Furthermore, to facilitate the rotation and adjustment of the insertion depth of the second nozzle 33, the second nozzle 33 also includes a screw-on lug 331, which is located on the top outer wall of the spray bar.

[0096] Furthermore, the second water passage 333 is a diameter through hole, the diameter of which can be constant or variable. When the bottom of the variable hole is connected to the first water passage 321, the diameter of the variable hole gradually decreases from the bottom to the top, thereby increasing the pressure at the outlet of the second nozzle 33 and increasing the jet speed.

[0097] Furthermore, the second water passage 333 has a flow disturbance structure inside its hole wall. The flow disturbance structure includes, but is not limited to, flow disturbance protrusions, flow disturbance threads, flow disturbance grooves, or flow disturbance marks provided on the hole wall (not specifically illustrated, but those skilled in the art should be able to understand them). This flow disturbance structure can further improve the cavitation effect of the water flow.

[0098] In this structure, water first enters through the inlet 101 of the outlet pipe 1, then enters the first nozzle body 2 through the outlet 102. The diameter of the elastic pipe 22 is adjusted by the Venturi adjustment mechanism 23. When the appropriate pipe diameter is reached, the water flow narrows (the elastic pipe 22 contracts), creating a low-pressure zone at the contraction point of the Venturi tube (static pressure, the pressure of the fluid against the pipe wall). When the pressure is lower than the saturated vapor pressure, the gas carried in the liquid will precipitate and form bubbles, achieving the effect of water cavitation. Simultaneously, the axial velocity at the constriction point of the Venturi tube increases, and the liquid is in a low-velocity zone near the wall at the rear end of the Venturi tube outlet. The velocity difference enhances the shearing action between the liquids, forming multiple vortices. The negative pressure zone at the center of the vortex also facilitates the formation of bubbles. Then, the water enters the Helmholtz resonant cavity inside the second nozzle body 3 through the elastic pipe 22 and the second nozzle inlet 311. By adjusting the influence parameters of the resonant cavity, resonance is formed, causing the water flow to self-excite oscillate and cavitate to form a second cavitation water flow effect. Finally, it is ejected through the second nozzle 33.

[0099] Please see Figures 8-11 The second structural form is described in detail below:

[0100] In this embodiment, the first nozzle body 2 serves as the final jet body, so it is equipped with a first nozzle head 25. The first nozzle head 25 is connected to the first nozzle body 2 via an elastic pipe 22. The first nozzle inlet 211 of the first nozzle body 2 is installed at the second nozzle outlet 341 of the second nozzle body 3. Since the second nozzle body 3 is not the final jet body, the structure of the second nozzle outlet 341 is also adjusted accordingly. Apart from this, the structure and function of other components are the same as in the first structural form described above.

[0101] The first nozzle body 2 mainly generates the Venturi effect by adjusting the pipe diameter at certain locations of the first nozzle body 2 through the Venturi adjustment mechanism 23, thereby accelerating the flow velocity. Specifically, the Venturi adjustment mechanism 23 adjusts the pipe diameter of the elastic pipe 22 to regulate the Venturi effect and achieve cavitation of the water flow.

[0102] The specific principle is that the first nozzle body 2, the elastic pipe 22, and the first nozzle 25 form a Venturi tube. The working principle of the Venturi tube is to narrow the fluid (the elastic pipe 22 narrows its diameter), so that the liquid forms a low-pressure zone at the narrowing point of the Venturi tube (at this time, it is static pressure, which is the pressure of the fluid on the pipe wall). When the pressure is lower than the saturated vapor pressure, the gas carried in the liquid will be released to form bubbles, achieving the effect of water cavitation. At the same time, the axial velocity at the narrowing point of the Venturi tube increases, and the liquid is in a low-velocity zone near the wall at the rear end of the Venturi tube outlet. The velocity difference strengthens the shearing action between the liquids, forming multiple vortices. The negative pressure zone at the center of the vortex also facilitates the formation of bubbles.

[0103] The Venturi adjustment mechanism 23 controls the diameter of the elastic conduit 22. It can be selected as an adjustable clamp or a mechanical iris mechanism, or other components capable of adjusting the tension. In this embodiment, a mechanical iris mechanism is described in detail with reference to the accompanying drawings.

[0104] Specifically, the Venturi regulating mechanism 23 (mechanical iris mechanism) includes an regulating base 231, multiple blades 232, and a drive ring 233. The regulating base 231 has a first mounting port that is installed to cooperate with the first nozzle body 2. Multiple first rotation points are provided on the regulating base 231 surrounding the first mounting port. One end of each of the multiple blades 232 is respectively installed at the multiple first rotation points, and the other end is opened / closed by clockwise / counterclockwise rotation. The drive ring 233 has a second mounting port that is installed to cooperate with the first nozzle body 2. Multiple first drive points are provided on the drive ring 233 surrounding the second mounting port. One end of each of the multiple blades 232 is respectively installed at the multiple first drive points, and the clockwise / counterclockwise rotation of the drive ring 233 is linked to the clockwise / counterclockwise rotation of the multiple blades 232. The elastic pipe 22 is located within the enclosed space of the multiple blades 232 and its diameter is adjusted by the opening / closing of the multiple blades 232, thereby regulating the Venturi effect and cavitation water flow.

[0105] The blade 232 has an arc-shaped plate structure. When closed, it forms a concentric ring structure. The inner ring has the smallest aperture. As multiple blades 232 open, the shape of the inner ring gradually changes and the enclosed space gradually increases, thereby achieving the adjustment of the venturi tube diameter.

[0106] There are two implementation methods for mounting the blade 232 and the adjusting base 231 through the first rotation point:

[0107] 1. The first rotation point is the first rotation shaft 2321, and the blade 232 is provided with a first rotation hole 2311, which is installed on the first rotation shaft 2321;

[0108] 2. The first rotation point is the first rotation hole 2311. The blade 232 is provided with a first rotation shaft 2321. The first rotation shaft 2321 is inserted and installed in the first rotation hole 2311. This embodiment adopts this implementation method.

[0109] There are two implementation methods for mounting the blade 232 and the drive ring 233 through the first drive point:

[0110] 1. The first driving point is the first driving shaft 2322, and the blade 232 is provided with a first strip hole 2331, which is installed on the first driving shaft 2322;

[0111] 2. The first driving point is the first strip hole 2331, and the blade 232 is provided with a first driving shaft 2322. The first driving shaft 2322 is inserted and installed on the first strip hole 2331. This embodiment adopts this implementation method.

[0112] To ensure stable installation of the Venturi adjustment mechanism 23, the Venturi adjustment mechanism 23 also includes an upper cover 234, which is installed on the adjustment base 231, forming an adjustment port between the upper cover 234 and the adjustment base 231. Specifically, the adjustment base 231 is a cylindrical structure, with the adjustment port located on the side of the cylindrical structure. The inner wall of the cylindrical structure is threaded, and the upper cover 234 has a threaded structure that matches the thread on the inner wall of the cylindrical structure, allowing the upper cover 234 and the adjustment base 231 to be detachably installed via the threads. It should be noted that the installation method between the upper cover 234 and the adjustment base 231 is not limited to this; other fixing connection methods are also possible, such as ultrasonic connection, bonding, and welding if the material is metal.

[0113] Furthermore, the Venturi adjustment mechanism 23 also includes a bottom cover 235, which is located at the bottom of the adjustment base 231. The top cover 234 and the bottom cover 235 stabilize the installation of components such as the adjustment base 231, the drive ring 233, and the blade 232. Preferably, the top cover 234 has a through hole adapted to the structure of the first nozzle 25, the purpose of which is to facilitate the first nozzle 25 to pass through the through hole and connect to the elastic pipe 22.

[0114] To further facilitate the rotation of the blade 232 by the drive ring 233, an adjustment handle 243 is provided on the drive ring 233. The adjustment handle 243 is located at the adjustment port and extends outward. Preferably, the drive ring 233 is a concentric ring structure, and the adjustment handle 243 is located on the side of the concentric ring structure.

[0115] Under normal circumstances, the water flow will affect the elastic pipe 22 and generate a force perpendicular to the drive ring 233. The effect on the horizontal direction of the drive ring 233 is small. Therefore, it is only necessary to adjust the degree of enclosure between the multiple blades 232 by rotating the drive ring 233 by adjusting the handle 243.

[0116] To further define the large-diameter and small-diameter states of the multiple blades 232 enclosing the tubes, the Venturi adjustment mechanism 23 also includes a limiting component 24. The limiting component 24 includes at least a first elastic protrusion 241a, a second elastic protrusion 241c, and a limiting groove 2431. The first elastic protrusion 241a and the second elastic protrusion 241c are disposed on the adjusting base 231, and the limiting groove 2431 is disposed on the side of the adjusting handle 243 facing the adjusting base 231. The position of the first elastic protrusion 241a is defined as the location where the blade 232 encloses a large-diameter enclosed space when the limiting groove 2431 is engaged with the first elastic protrusion 241a, that is, when the limiting groove 2431 is engaged with the first elastic protrusion 241a, the blade 232 encloses a large-diameter state; the position of the second elastic protrusion 241c is defined as the location where the blade 232 encloses a small-diameter enclosed space when the limiting groove 2431 is engaged with the second elastic protrusion 241c, that is, when the limiting groove 2431 is engaged with the second elastic protrusion 241c, the blade 232 encloses a small-diameter state.

[0117] Specifically, the first elastic protrusion 241a is mounted on the adjusting base 231 via the first spring 242a. The adjusting base 231 has a first mounting groove, and the first elastic protrusion 241a is mounted in the first mounting groove via the first spring 242a. Similarly, the second elastic protrusion 241c is mounted on the adjusting base 231 via the second spring 242c. The adjusting base 231 has a second mounting groove, and the second elastic protrusion 241c is mounted in the second mounting groove via the second spring 242c.

[0118] Furthermore, the limiting groove 2431 is a guide groove provided on the adjusting handle 243, and the limiting component 24 also includes a plug 244, which is inserted into the guide groove. When the limiting groove 2431 needs to be used, the plug 244 is pulled out or pulled open to expose the guide groove.

[0119] To increase the number of adjustable diameter settings, the limiting component 24 may also include a third elastic protrusion 241b. The third elastic protrusion 241b is disposed on the adjusting base 231. The position of the third elastic protrusion 241b is defined as the space where the blade 232 encloses the middle diameter when the limiting groove 2431 is engaged with the third elastic protrusion 241b, that is, when the limiting groove 2431 is engaged with the third elastic protrusion 241b, the blade 232 is in the middle diameter state.

[0120] Specifically, the third elastic protrusion 241b is mounted on the adjusting base 231 via the third spring 242b. The adjusting base 231 has a third mounting groove, and the third elastic protrusion 241b is mounted in the third mounting groove via the third spring 242b.

[0121] It should be noted that the terms "large", "medium", and "small" in this embodiment refer to the relative size of the enclosed space between the blades 232, and are not absolute concepts. Those skilled in the art should understand this.

[0122] The second nozzle body 3 achieves first-stage water cavitation through Helmholtz resonance. In this structure, the second nozzle outlet 341 of the second nozzle body 3 is installed at the first nozzle inlet 211, and the second nozzle inlet 311 is connected to the external water outlet pipe 1. An elastic resonant element 32 is disposed inside the second nozzle body 3, and a Helmholtz resonance chamber 312 is formed between the elastic resonant element 32 and the second nozzle inlet 311. A first water passage hole 321 is provided on the elastic resonant element 32. When the water flow from the second nozzle inlet 311 enters the Helmholtz resonance chamber 312 and impacts the elastic resonant element 32, resonance is generated, thereby increasing the self-excited oscillation of the water flow, causing the air bubbles in the water flow to be squeezed out by the oscillation, forming abundant foam.

[0123] A Helmholtz resonance chamber 312 is formed between the elastic resonator 32 and the second nozzle body 3. One end of this chamber is connected to the second nozzle inlet 311 for easy water intake, and the other end is connected to the second water passage 333 for easy water outlet. To better form this chamber, the elastic resonator 32 is conical, with the first water passage 321 located at the bottom of the conical elastic resonator 32. An angle α is formed between the side of the conical elastic resonator 32 and the side wall of the Helmholtz resonance chamber 312. Furthermore, to increase the impact area between the water flow and the conical elastic resonator 32, the side of the conical elastic resonator 32 is stepped. Preferably, the conical elastic resonator 32 is specifically an inverted cone shape, with the cone tip facing the second nozzle inlet 311.

[0124] In this embodiment, the second nozzle 33 is used to communicate with and spray water from the Helmholtz resonant chamber 312. The resonance effect of the Helmholtz resonant chamber 312 mainly depends on the angle α of the water flow impacting the elastic resonator 32, the length L of the Helmholtz resonant chamber 312, and the oscillation frequency f of the elastic resonator 32. These parameters are adjusted in conjunction with the various components below.

[0125] Furthermore, the second nozzle 33 includes at least one spray bar, a second water passage 333 is provided through the spray bar, a first thread 334 is provided on the outer periphery of the spray bar along the length direction, a second thread 3411 adapted to the first thread 334 is provided on the inner wall of the second nozzle outlet 341, the spray bar can be inserted into the second nozzle body 3 in an adjustable manner through the first thread 334 and the second thread 3411, the bottom of the spray bar is connected to the elastic resonator 32, the second water passage 333 communicates with the first water passage 321, and the angle α is indirectly adjusted by the insertion depth of the spray bar. Specifically, taking one threaded implementation as an example, the following description is provided: When the spray bar rotates clockwise, it slowly extends into the interior of the second nozzle base 31, simultaneously pressing against the elastic resonator 32 facing the water inlet 311 of the second nozzle, causing it to deform and lengthen. At the same time, the angle α between the elastic resonator 32 and the inner wall of the cavity decreases. Since the elastic resonator 32 has deformed, its oscillation frequency f has also changed, causing the oscillation frequency of the water flow impacting the elastic resonator 32 to also change. When it approaches the natural frequency of the elastic resonator 32, a resonance effect occurs, greatly improving the self-excited oscillation effect of the water flow.

[0126] Furthermore, the second nozzle body 3 includes a cylindrical second nozzle base 31 and a second nozzle top cover 34. A guide block 342 is provided on the cylindrical wall of the second nozzle top cover 34, the second nozzle outlet 341 is provided on the second nozzle top cover 34, the second nozzle inlet 311 is provided on the second nozzle base 31, and a guide groove is provided on the cylindrical wall of the second nozzle base 31. The second nozzle top cover 34 is guided by the guide block 342 and screwed into the guide groove to be installed on the second nozzle base 31.

[0127] Specifically, the guide groove includes at least a first guide groove body 3141 and a second guide groove body 3142, and the first guide groove body 3141 and the second guide groove body 3142 are positioned at different heights on the second nozzle base 31.

[0128] like Figure 6 As shown, the cylindrical second nozzle base 31 and the second nozzle top cover 34 are connected by an internal and external insertion method. The guide block 342 and the guide groove restrict their axial separation. Specifically, the guide block 342 is provided on the outer side of the cylindrical wall of the second nozzle top cover 34; while the inner side of the cylindrical wall of the second nozzle base 31 has at least two or more guide grooves of different depths. Specifically, the guide grooves are generally L-shaped. The guide block 342 is first aligned and inserted downwards, then laterally guided and fixed. For example, the guide block 342 is aligned with the L-shaped opening of the first guide groove 3141, inserted downwards into the first guide groove 3141, and then the knob is turned horizontally to complete the installation of the second nozzle base 31 and the second nozzle top cover 34; or, the guide block 342 is aligned with the L-shaped opening of the second guide groove 3142 at a deeper position, inserted downwards into the second guide groove 3142, and then the knob is turned horizontally to complete the installation of the second nozzle base 31 and the second nozzle top cover 34.

[0129] By installing the second nozzle base 31 and the second nozzle top cover 34 at different engagement depths, the depth L of the Helmholtz resonance chamber 312 between the elastic resonator 32 and the second nozzle base 31 can also be adjusted, as follows:

[0130] Please combine Figure 4 and Figure 6 The top of the elastic resonator 32 is clamped and fixed between the second nozzle base 31 and the second nozzle top cover 34; or, the top of the elastic resonator 32 is fixed to the second nozzle top cover 34. Therefore, when the engagement position between the second nozzle base 31 and the second nozzle top cover 34 is different, the position of the elastic resonator 32 is also different. Since the cavity height inside the second nozzle base 31 is constant, the relative height between the elastic resonator 32 and the second nozzle base 31 will be different, that is, the height L of the Helmholtz resonant chamber 312 will change.

[0131] To facilitate the fixed connection between the spray bar and the elastic resonator 32, a fixing tube 332 is provided. This fixing tube 332 is adapted to be installed at the bottom of the spray bar. The bottom of the inverted conical elastic resonator 32 is clamped and fixed between the fixing tube 332 and the spray bar. The position of the second water passage 333 corresponds to the connection with the first water passage 321. That is, both the fixing tube 332 and the spray bar are rigid, non-deformable structures, and the inverted conical elastic resonator 32 can be fixed by compression.

[0132] In this embodiment, the elastic resonator 32 is made of elastic rubber material.

[0133] Furthermore, this structure does not have a screw-on ear plate 331, but instead has a mounting port protruding on the second nozzle opening of the second nozzle top cover 34. The mounting port has a spray bar that can perform basic functions such as telescopic adjustment, and the mounting port is threadedly installed with the first nozzle inlet 211 of the first nozzle body 2.

[0134] Furthermore, the second water passage 333 is a diameter through hole, the diameter of which can be constant or variable. When the bottom of the variable hole is connected to the first water passage 321, the diameter of the variable hole gradually decreases from the bottom to the top, thereby increasing the pressure at the outlet of the second nozzle 33 and increasing the jet speed.

[0135] Furthermore, the second water passage 333 has a flow disturbance structure inside its hole wall. The flow disturbance structure includes, but is not limited to, flow disturbance protrusions, flow disturbance threads, flow disturbance grooves, or flow disturbance marks provided on the hole wall (not specifically illustrated, but those skilled in the art should be able to understand them). This flow disturbance structure can further improve the cavitation effect of the water flow.

[0136] In this structure, water first enters the outlet pipe 1 through the inlet 101, then enters the Helmholtz resonant cavity within the second nozzle body 3 through the outlet 102. Resonance is achieved by adjusting the parameters of the resonant cavity, causing the water flow to self-excite and cavitate. The water then passes through the nozzle rod and the outlet 341 of the second nozzle into the first nozzle body 2. The diameter of the elastic pipe 22 is adjusted by the Venturi adjustment mechanism 23. When the appropriate diameter is reached, the water flow narrows (the elastic pipe 22 contracts). This creates a low-pressure zone (static pressure, the pressure of the fluid against the tube wall) at the contraction point of the Venturi tube. When the pressure is lower than the saturated vapor pressure, the gas carried in the liquid will precipitate and form bubbles, achieving the effect of water cavitation. At the same time, the axial velocity at the contraction point of the Venturi tube increases, and the liquid is in a low-velocity zone near the wall at the rear end of the Venturi tube outlet. The velocity difference strengthens the shearing action between the liquids, forming multiple vortices. The negative pressure zone at the center of the vortex also facilitates the formation of bubbles, achieving a second layer of water cavitation.

[0137] The beneficial effects of adopting the above solution in this embodiment are as follows:

[0138] The diameter of the elastic pipe 22 is adjusted by controlling the degree of enclosure of multiple blades 232, thereby achieving different degrees of cavitation of the water flow according to the degree of flow velocity change of the Venturi effect, thus providing nozzle users with a variety of choices.

[0139] The Venturi regulating mechanism 23 is located outside the flexible pipe 22 and does not come into contact with the water circuit. It is simple and convenient to install and adjust, and it is also cleaner and does not affect the internal water circuit.

[0140] The Helmholtz resonant chamber 312 is formed by the elastic resonant element 32. After the water flows into the Helmholtz resonant chamber 312 from the second nozzle inlet 311 of the second nozzle body 3, it impacts the elastic resonant element 32. The oscillation frequency of the elastic resonant element 32 generates resonance, which can greatly excite the Helmholtz resonant chamber 312 to a great extent and cause the gas in the water flow to be squeezed and impacted to form bubbles, which are then sprayed out from the second nozzle 33, generating a large amount of foam to improve the cleaning effect.

[0141] The resonance parameters within the Helmholtz resonant chamber 312 mainly include the angle α of the water flow impacting the elastic resonator 32, the length L of the Helmholtz resonant chamber 312, and the oscillation frequency f of the elastic resonator 32. The oscillation frequency f can be adjusted by the deformation of the elastic resonator 32 caused by the insertion depth of the spray bar. Furthermore, as the inverted conical elastic resonator 32 is elongated, the angle α of the water flow impacting the elastic resonator 32 can also be adjusted. The relative distance between the second nozzle base 31 and the second nozzle top cover 34, achieved through the installation of different guide grooves, can be adjusted, thereby adjusting the length L of the Helmholtz resonant chamber 312. By combining these three adjustments, the optimal resonance effect can be achieved.

[0142] Example 2:

[0143] This embodiment provides a dual cavitation water flosser based on Helmholtz resonance and the Venturi effect, including a water flosser body 4 and a dual cavitation nozzle based on Helmholtz resonance and the Venturi effect as in Embodiment 1. The dual cavitation nozzle is mounted on the water flosser body 4 and connected to the water tank of the water flosser body 4 via a mechanism assembly. The water flosser body 4 is applicable to any existing water flosser on the market. This embodiment does not repeat the principle of the water flosser, as those skilled in the art should understand it.

[0144] In Example 1, the first nozzle body 2 and the second nozzle body 3 in the dual cavitation nozzle based on Helmholtz resonance and Venturi effect have two combination forms. For simplicity, this example uses the first structural form described in Example 1 to be adapted and installed on the water flosser body 4. Figure 12 As shown.

[0145] Specifically, the dual cavitation nozzle includes a first nozzle body 2 and a second nozzle body 3. The Venturi effect is realized in the first nozzle body 2, and the Helmholtz resonance effect is realized in the second nozzle body 3. The first nozzle body 2 is installed on the water outlet pipe 1, and the water outlet pipe 1 is further installed on the oral irrigator body 4.

[0146] Specifically, the first nozzle body 2 has a first nozzle inlet 211 and a first nozzle outlet 212 at its two ends, respectively. The first nozzle body 2 also has an elastic pipe 22 connecting the first nozzle inlet 211 and the first nozzle outlet 212. A Venturi adjustment mechanism 23 is also provided on the first nozzle body 2, which adjustably contracts the diameter of the elastic pipe 22 to create a Venturi effect. The second nozzle body 3 has an elastic resonant element 32, with a second nozzle inlet 311 and a second nozzle outlet 341. The elastic resonant element 32 is located inside the second nozzle body 3, forming a Helmholtz resonance chamber 312 between the elastic resonant element 32 and the second nozzle inlet 311. A first water passage hole 321 is opened on the elastic resonant element 32, which communicates with the second nozzle outlet 341.

[0147] The first nozzle body 2 mainly generates the Venturi effect by adjusting the pipe diameter at certain locations of the first nozzle body 2 through the Venturi adjustment mechanism 23, thereby accelerating the flow velocity. Specifically, the Venturi adjustment mechanism 23 adjusts the pipe diameter of the elastic pipe 22 to regulate the Venturi effect and achieve cavitation of the water flow.

[0148] The specific principle is that the first nozzle body 2, the elastic pipe 22, and the second nozzle body 3 connected to the elastic pipe 22 form a Venturi tube. The working principle of the Venturi tube is to narrow the fluid (the elastic pipe 22 narrows its diameter), so that the liquid forms a low-pressure zone at the narrowing point of the Venturi tube (at this time, it is static pressure, which is the pressure of the fluid on the pipe wall). When the pressure is lower than the saturated vapor pressure, the gas carried in the liquid will be released to form bubbles, achieving the effect of water cavitation. At the same time, the axial velocity at the narrowing point of the Venturi tube increases, and the liquid is in a low-velocity zone near the wall at the rear end of the Venturi tube outlet. The velocity difference strengthens the shearing action between the liquids, forming multiple vortices. The negative pressure zone at the center of the vortex also facilitates the formation of bubbles, achieving the effect of water cavitation.

[0149] The Venturi adjustment mechanism 23 controls the diameter of the elastic conduit 22. It can be selected as an adjustable clamp or a mechanical iris mechanism, or other components capable of adjusting the tension. In this embodiment, a mechanical iris mechanism is described in detail with reference to the accompanying drawings.

[0150] Specifically, the Venturi regulating mechanism 23 (mechanical iris mechanism) includes an regulating base 231, multiple blades 232, and a drive ring 233. The regulating base 231 has a first mounting port that is installed to cooperate with the first nozzle body 2. Multiple first rotation points are provided on the regulating base 231 surrounding the first mounting port. One end of each of the multiple blades 232 is respectively installed at the multiple first rotation points, and the other end is opened / closed by clockwise / counterclockwise rotation. The drive ring 233 has a second mounting port that is installed to cooperate with the first nozzle body 2. Multiple first drive points are provided on the drive ring 233 surrounding the second mounting port. One end of each of the multiple blades 232 is respectively installed at the multiple first drive points, and the clockwise / counterclockwise rotation of the drive ring 233 is linked to the clockwise / counterclockwise rotation of the multiple blades 232. The elastic pipe 22 is located within the enclosed space of the multiple blades 232 and its diameter is adjusted by the opening / closing of the multiple blades 232, thereby regulating the Venturi effect and cavitation water flow.

[0151] The blade 232 has an arc-shaped plate structure. When closed, it forms a concentric ring structure. The inner ring has the smallest aperture. As multiple blades 232 open, the shape of the inner ring gradually changes and the enclosed space gradually increases, thereby achieving the adjustment of the venturi tube diameter.

[0152] There are two implementation methods for mounting the blade 232 and the adjusting base 231 through the first rotation point:

[0153] 1. The first rotation point is the first rotation shaft 2321, and the blade 232 is provided with a first rotation hole 2311, which is installed on the first rotation shaft 2321;

[0154] 2. The first rotation point is the first rotation hole 2311. The blade 232 is provided with a first rotation shaft 2321. The first rotation shaft 2321 is inserted and installed in the first rotation hole 2311. This embodiment adopts this implementation method.

[0155] There are two implementation methods for mounting the blade 232 and the drive ring 233 through the first drive point:

[0156] 1. The first driving point is the first driving shaft 2322, and the blade 232 is provided with a first strip hole 2331, which is installed on the first driving shaft 2322;

[0157] 2. The first driving point is the first strip hole 2331, and the blade 232 is provided with a first driving shaft 2322. The first driving shaft 2322 is inserted and installed on the first strip hole 2331. This embodiment adopts this implementation method.

[0158] To ensure stable installation of the Venturi adjustment mechanism 23, the Venturi adjustment mechanism 23 also includes an upper cover 234, which is installed on the adjustment base 231, forming an adjustment port between the upper cover 234 and the adjustment base 231. Specifically, the adjustment base 231 is a cylindrical structure, with the adjustment port located on the side of the cylindrical structure. The inner wall of the cylindrical structure is threaded, and the upper cover 234 has a threaded structure that matches the thread on the inner wall of the cylindrical structure, allowing the upper cover 234 and the adjustment base 231 to be detachably installed via the threads. It should be noted that the installation method between the upper cover 234 and the adjustment base 231 is not limited to this; other fixing connection methods are also possible, such as ultrasonic connection, bonding, and welding if the material is metal.

[0159] Furthermore, the Venturi adjustment mechanism 23 also includes a bottom cover 235, which is located at the bottom of the adjustment base 231. The top cover 234 and the bottom cover 235 stabilize the installation of components such as the adjustment base 231, the drive ring 233, and the blade 232. In this embodiment, the first nozzle body 2 consists of two pipes with different diameters. The pipe with the smaller diameter passes through the first mounting port and connects to the water outlet pipe 1, while the pipe with the larger diameter abuts against the adjustment base 231 and is fixed in place.

[0160] To further facilitate the rotation of the blade 232 by the drive ring 233, an adjustment handle 243 is provided on the drive ring 233. The adjustment handle 243 is located at the adjustment port and extends outward. Preferably, the drive ring 233 is a concentric ring structure, and the adjustment handle 243 is located on the side of the concentric ring structure.

[0161] Under normal circumstances, the water flow will affect the elastic pipe 22 and generate a force perpendicular to the drive ring 233. The effect on the horizontal direction of the drive ring 233 is small. Therefore, it is only necessary to adjust the degree of enclosure between the multiple blades 232 by rotating the drive ring 233 by adjusting the handle 243.

[0162] To further define the large-diameter and small-diameter states of the multiple blades 232 enclosing the tubes, the Venturi adjustment mechanism 23 also includes a limiting component 24. The limiting component 24 includes at least a first elastic protrusion 241a, a second elastic protrusion 241c, and a limiting groove 2431. The first elastic protrusion 241a and the second elastic protrusion 241c are disposed on the adjusting base 231, and the limiting groove 2431 is disposed on the side of the adjusting handle 243 facing the adjusting base 231. The position of the first elastic protrusion 241a is defined as the location where the blade 232 encloses a large-diameter enclosed space when the limiting groove 2431 is engaged with the first elastic protrusion 241a, that is, when the limiting groove 2431 is engaged with the first elastic protrusion 241a, the blade 232 encloses a large-diameter state; the position of the second elastic protrusion 241c is defined as the location where the blade 232 encloses a small-diameter enclosed space when the limiting groove 2431 is engaged with the second elastic protrusion 241c, that is, when the limiting groove 2431 is engaged with the second elastic protrusion 241c, the blade 232 encloses a small-diameter state.

[0163] Specifically, the first elastic protrusion 241a is mounted on the adjusting base 231 via the first spring 242a. The adjusting base 231 has a first mounting groove, and the first elastic protrusion 241a is mounted in the first mounting groove via the first spring 242a. Similarly, the second elastic protrusion 241c is mounted on the adjusting base 231 via the second spring 242c. The adjusting base 231 has a second mounting groove, and the second elastic protrusion 241c is mounted in the second mounting groove via the second spring 242c.

[0164] Furthermore, the limiting groove 2431 is a guide groove provided on the adjusting handle 243, and the limiting component 24 also includes a plug 244, which is inserted into the guide groove. When the limiting groove 2431 needs to be used, the plug 244 is pulled out or pulled open to expose the guide groove.

[0165] To increase the number of adjustable diameter settings, the limiting component 24 may also include a third elastic protrusion 241b. The third elastic protrusion 241b is disposed on the adjusting base 231. The position of the third elastic protrusion 241b is defined as the space where the blade 232 encloses the middle diameter when the limiting groove 2431 is engaged with the third elastic protrusion 241b, that is, when the limiting groove 2431 is engaged with the third elastic protrusion 241b, the blade 232 is in the middle diameter state.

[0166] Specifically, the third elastic protrusion 241b is mounted on the adjusting base 231 via the third spring 242b. The adjusting base 231 has a third mounting groove, and the third elastic protrusion 241b is mounted in the third mounting groove via the third spring 242b.

[0167] It should be noted that the terms "large", "medium", and "small" in this embodiment refer to the relative size of the enclosed space between the blades 232, and are not absolute concepts. Those skilled in the art should understand this.

[0168] In this embodiment, the first nozzle body 2 has a first nozzle inlet 211 and a first nozzle outlet 212 at both ends. The first nozzle inlet 211 is used as a water inlet and is connected to the external water outlet pipe 1. The first nozzle outlet 212 is used indirectly as a water outlet after the first cavitation and is connected to the second nozzle body 3.

[0169] Please combine Figure 6 The second nozzle body 3 achieves second-stage water cavitation through Helmholtz resonance. An elastic resonant element 32 is disposed inside the second nozzle body 3. A Helmholtz resonance chamber 312 is formed between the elastic resonant element 32 and the water inlet 311 of the second nozzle. A first water passage hole 321 is provided on the elastic resonant element 32. When the water flow from the water inlet 311 of the second nozzle enters the Helmholtz resonance chamber 312 and impacts the elastic resonant element 32, resonance is generated, thereby increasing the self-excited oscillation of the water flow, causing the air bubbles in the water flow to be squeezed out by the oscillation, forming abundant foam.

[0170] In this embodiment, the second nozzle body 3 serves as the final jet body, so the second nozzle body 3 is provided with a second nozzle 33. The second nozzle 33 is installed at the second nozzle outlet 341, and the second nozzle 33 has a second water passage 333. When the second water passage 333 is connected to the first water passage 321 on the elastic resonant member 32, the water flow with abundant bubbles after being vibrated by the Helmholtz resonant chamber 312 is ejected from the second nozzle 33.

[0171] Specifically, a Helmholtz resonance chamber 312 is formed between the elastic resonator 32 and the second nozzle body 3. One end of this chamber is connected to the second nozzle inlet 311 for easy water intake, and the other end is connected to the second water passage 333 for easy water outlet. To better form this chamber, the elastic resonator 32 is conical, with the first water passage 321 located at the bottom of the conical elastic resonator 32. An angle α is formed between the side of the conical elastic resonator 32 and the side wall of the Helmholtz resonance chamber 312. Furthermore, to increase the impact area between the water flow and the conical elastic resonator 32, the side of the conical elastic resonator 32 is stepped. Preferably, the conical elastic resonator 32 is specifically an inverted cone shape, with the cone tip facing the second nozzle inlet 311.

[0172] In this embodiment, the second nozzle 33 is used to communicate with and spray water from the Helmholtz resonant chamber 312. The resonance effect of the Helmholtz resonant chamber 312 mainly depends on the angle α of the water flow impacting the elastic resonator 32, the length L of the Helmholtz resonant chamber 312, and the oscillation frequency f of the elastic resonator 32. These parameters are adjusted in conjunction with the various components below.

[0173] Furthermore, the second nozzle 33 includes at least one spray bar, a second water passage 333 is provided through the spray bar, a first thread 334 is provided on the outer periphery of the spray bar along the length direction, a second thread 3411 adapted to the first thread 334 is provided on the inner wall of the second nozzle outlet 341, the spray bar can be inserted into the second nozzle body 3 in an adjustable manner through the first thread 334 and the second thread 3411, the bottom of the spray bar is connected to the elastic resonator 32, the second water passage 333 communicates with the first water passage 321, and the angle α is indirectly adjusted by the insertion depth of the spray bar. Specifically, taking one threaded implementation as an example, the following description is provided: When the spray bar rotates clockwise, it slowly extends into the interior of the second nozzle base 31, simultaneously pressing against the elastic resonator 32 facing the water inlet 311 of the second nozzle, causing it to deform and lengthen. At the same time, the angle α between the elastic resonator 32 and the inner wall of the cavity decreases. Since the elastic resonator 32 has deformed, its oscillation frequency f has also changed, causing the oscillation frequency of the water flow impacting the elastic resonator 32 to also change. When it approaches the natural frequency of the elastic resonator 32, a resonance effect occurs, greatly improving the self-excited oscillation effect of the water flow.

[0174] Furthermore, the second nozzle body 3 includes a cylindrical second nozzle base 31 and a second nozzle top cover 34. A guide block 342 is provided on the cylindrical wall of the second nozzle top cover 34, the second nozzle outlet 341 is provided on the second nozzle top cover 34, the second nozzle inlet 311 is provided on the second nozzle base 31, and a guide groove is provided on the cylindrical wall of the second nozzle base 31. The second nozzle top cover 34 is guided by the guide block 342 and screwed into the guide groove to be installed on the second nozzle base 31.

[0175] Specifically, the guide groove includes at least a first guide groove body 3141 and a second guide groove body 3142, and the first guide groove body 3141 and the second guide groove body 3142 are positioned at different heights on the second nozzle base 31.

[0176] like Figure 6As shown, the cylindrical second nozzle base 31 and the second nozzle top cover 34 are connected by an internal and external insertion method. The guide block 342 and the guide groove restrict their axial separation. Specifically, the guide block 342 is provided on the outer side of the cylindrical wall of the second nozzle top cover 34; while the inner side of the cylindrical wall of the second nozzle base 31 is provided with at least two or more guide grooves of different depths. Specifically, the guide grooves are generally L-shaped. The guide block 342 is first aligned and inserted downwards, then laterally guided and fixed. For example, the guide block 342 is aligned with the L-shaped opening of the first guide groove 3141, inserted downwards into the first guide groove 3141, and then the knob is turned horizontally to complete the installation of the second nozzle base 31 and the second nozzle top cover 34; or, the guide block 342 is aligned with the L-shaped opening of the second guide groove 3142 at a deeper position, inserted downwards into the second guide groove 3142, and then the knob is turned horizontally to complete the installation of the second nozzle base 31 and the second nozzle top cover 34.

[0177] By installing the second nozzle base 31 and the second nozzle top cover 34 at different engagement depths, the depth L of the Helmholtz resonance chamber 312 between the elastic resonator 32 and the second nozzle base 31 can also be adjusted, as follows:

[0178] Please combine Figure 4 and Figure 6 The top of the elastic resonator 32 is clamped and fixed between the second nozzle base 31 and the second nozzle top cover 34; or, the top of the elastic resonator 32 is fixed to the second nozzle top cover 34. Therefore, when the engagement position between the second nozzle base 31 and the second nozzle top cover 34 is different, the position of the elastic resonator 32 is also different. Since the cavity height inside the second nozzle base 31 is constant, the relative height L between the elastic resonator 32 and the second nozzle base 31 will be different, that is, the height of the Helmholtz resonant chamber 312 will change.

[0179] To facilitate the fixed connection between the spray bar and the elastic resonator 32, a fixing tube 332 is provided. This fixing tube 332 is adapted to be installed at the bottom of the spray bar. The bottom of the inverted conical elastic resonator 32 is clamped and fixed between the fixing tube 332 and the spray bar. The position of the second water passage 333 corresponds to the connection with the first water passage 321. That is, both the fixing tube 332 and the spray bar are rigid, non-deformable structures, and the inverted conical elastic resonator 32 can be fixed by compression.

[0180] In this embodiment, the elastic resonator 32 is made of elastic rubber material.

[0181] Furthermore, to facilitate the rotation and adjustment of the insertion depth of the second nozzle 33, the second nozzle 33 also includes a screw-on lug 331, which is located on the top outer wall of the spray bar.

[0182] Furthermore, the second water passage 333 is a diameter through hole, the diameter of which can be constant or variable. When the bottom of the variable hole is connected to the first water passage 321, the diameter of the variable hole gradually decreases from the bottom to the top, thereby increasing the pressure at the outlet of the second nozzle 33 and increasing the jet speed.

[0183] Furthermore, the second water passage 333 has a flow disturbance structure inside its hole wall. The flow disturbance structure includes, but is not limited to, flow disturbance protrusions, flow disturbance threads, flow disturbance grooves, or flow disturbance marks provided on the hole wall (not specifically illustrated, but those skilled in the art should be able to understand them). This flow disturbance structure can further improve the cavitation effect of the water flow.

[0184] In this embodiment, the user first turns on the water flosser to rinse their teeth. At this time, the water in the water tank of the water flosser body 4 is sprayed into the water outlet pipe 1 by the core assembly, and then enters the first nozzle body 2 from the water outlet 102 of the water outlet pipe, and enters the Venturi tube. The water flow changes from coarse to fine (the elastic pipe 22 narrows its diameter), so that the liquid forms a low-pressure area at the narrowing point of the Venturi tube (at this time it is static pressure, which is the pressure of the fluid on the pipe wall). When the pressure is lower than the saturated vapor pressure, the gas carried in the liquid will be released to form bubbles, achieving the effect of water cavitation; at the same time, the axial flow velocity at the narrowing point of the Venturi tube increases. The liquid is in a low-velocity zone near the wall at the rear end of the Venturi tube outlet. The velocity difference enhances the shearing action between the liquids, forming multiple vortices. The negative pressure zone at the center of the vortex further aids in bubble formation, achieving the first stage of water cavitation. Then, the liquid enters the Helmholtz resonant cavity within the second nozzle body 3 through the elastic pipe 22 and the second nozzle inlet 311. By adjusting the influence parameters of the resonant cavity, resonance is achieved, causing the water flow to self-excite and cavitate, creating the second stage of cavitation. Finally, the water is sprayed through the second nozzle 33 to rinse the teeth, allowing the user to experience the cavitation effect. In subsequent use, the handle 243 can be adjusted to regulate the Venturi tube, or the spray bar of the second nozzle 33 can be adjusted to regulate the resonance, until the user finds a suitable setting.

[0185] The beneficial effects of adopting the above technical solutions are as follows:

[0186] The dual cavitation nozzle with Helmholtz resonance and Venturi effect is installed on the water outlet pipe 1 of the oral irrigator body 4, so that the water flow of the oral irrigator can form a dual cavitation effect, and the cavitation effect can be combined and adjusted to generate a large number of bubbles, thereby better removing dental plaque and cleaning the oral cavity.

[0187] Example 3:

[0188] This embodiment describes the application of a dual cavitation nozzle based on Helmholtz resonance and Venturi effect in a cleaning device. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect is installed in the spray pipeline of the cleaning device, which includes, but is not limited to, car wash equipment and atomizing equipment.

[0189] The dual cavitation nozzle based on Helmholtz resonance and Venturi effect has been described in detail in Example 1. Therefore, this example will not describe the dual cavitation nozzle again. Those skilled in the art should be able to obtain the specific structure and function of the dual cavitation nozzle based on the content described in Example 1.

[0190] The beneficial effects of adopting the above technical solutions are as follows:

[0191] Taking car wash equipment as an example, after installing a dual cavitation nozzle based on Helmholtz resonance and Venturi effect, when spraying water and cleaning foam on the car body, the dual cavitation liquid can generate foam better, making the foam richer and more conducive to cleaning the car; similarly, the atomizing equipment can make the atomization more uniform and the atomization effect better by cavitating the liquid through the nozzle.

[0192] Those skilled in the art should understand that the embodiments of the present invention described above are merely examples and do not limit the invention. The objectives of the present invention have been fully and effectively achieved. The functions and structural principles of the present invention have been shown and explained in the embodiments, and any modifications or variations of the implementation of the present invention may be made without departing from the stated principles.

Claims

1. A dual cavitation nozzle based on Helmholtz resonance and Venturi effect, characterized in that, include: The first nozzle body has a first nozzle inlet and a first nozzle outlet at its two ends, and the first nozzle body also has an elastic pipe connecting the first nozzle inlet and the first nozzle outlet. The first nozzle body is also provided with a Venturi adjustment mechanism, which can adjustably shrink the diameter of the elastic pipe to form a Venturi effect. The second nozzle body has an elastic resonant element inside. The second nozzle body has a second nozzle inlet and a second nozzle outlet. A Helmholtz resonant chamber is formed between the elastic resonant element and the second nozzle inlet. A first water passage hole is opened on the elastic resonant element, and the first water passage hole is connected to the second nozzle outlet. The first nozzle body and the second nozzle body are assembled together. The Venturi adjustment mechanism includes an adjustment base, multiple blades, and a drive ring. The adjustment base has a first mounting port that mates with the first nozzle body. Multiple first rotation points are provided on the adjustment base surrounding the first mounting port. One end of each of the multiple blades is respectively mounted on one of the multiple first rotation points, and clockwise / counterclockwise rotation opens / closes the other end of the blades. The drive ring has a second mounting port that mates with the first nozzle body. Multiple first drive points are provided on the drive ring surrounding the second mounting port. The other end of each of the multiple blades is respectively mounted on one of the multiple first drive points, and clockwise / counterclockwise rotation of the drive ring triggers clockwise / counterclockwise rotation of the multiple blades. The elastic pipe, located within the enclosed space of the multiple blades, has its diameter adjusted by the opening / closing of the multiple blades, thereby regulating the Venturi effect and cavitation of the water flow. The elastic resonator is conical, the first water passage is located at the bottom of the conical elastic resonator, and one or more bends are provided on the side of the conical elastic resonator. An angle α is formed between the side wall of the Helmholtz resonant chamber and the corner of the bend. The second nozzle body is also provided with a second nozzle head, which includes at least one spray rod. The spray rod has a second water passage hole through it along the axial direction. The outer periphery of the spray rod has a first thread along its length. The inner wall of the outlet of the second nozzle has a second thread that matches the first thread. The spray rod can be inserted into the second nozzle body in an adjustable manner through the first thread and the second thread. The bottom of the spray rod is connected to the elastic resonator. The second water passage hole communicates with the first water passage hole. The angle α is indirectly adjusted by the insertion depth of the spray rod.

2. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect according to claim 1, characterized in that: The Venturi adjustment mechanism also includes a limiting component, which is locked / unlocked at the relative position between the drive ring and the adjustment base.

3. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect according to claim 1, characterized in that: The first rotation point is a first rotation shaft, and the blade is provided with a first rotation hole, which is installed on the first rotation shaft; or, the first rotation point is a first rotation hole, and the blade is provided with a first rotation shaft, which is inserted into the first rotation hole.

4. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect according to claim 1, characterized in that: The first driving point is a first driving shaft, and the blade is provided with a first strip hole, which is installed on the first driving shaft; or, the first driving point is a first strip hole, and the blade is provided with a first driving shaft, which is inserted into the first strip hole.

5. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect according to claim 1, characterized in that: It also includes a fixing tube, which is adapted to be installed at the bottom of the spray bar. The bottom of the conical elastic resonator is clamped and fixed between the fixing tube and the spray bar. The position of the second water passage hole is connected to the first water passage hole.

6. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect according to claim 1, characterized in that: The second nozzle body includes a cylindrical second nozzle base and a second nozzle top cover. The second nozzle inlet is located on the second nozzle base, and the second nozzle outlet is located on the second nozzle top cover. A guide block is provided on the cylindrical wall of the second nozzle top cover, and a guide groove is provided on the cylindrical wall of the second nozzle base. The second nozzle top cover is screwed into the guide groove by the guide block and installed on the second nozzle base.

7. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect according to claim 6, characterized in that: The guide groove includes at least a first guide groove body and a second guide groove body, and the first guide groove body and the second guide groove body are positioned at different heights on the second nozzle base.

8. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect according to claim 6, characterized in that: The top of the elastic resonator is clamped and fixed between the second nozzle base and the second nozzle top cover; or, the top of the elastic resonator is fixed to the second nozzle top cover.

9. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect according to any one of claims 6 to 8, characterized in that: When the first nozzle outlet of the first nozzle body is assembled and installed on the second nozzle inlet of the second nozzle body; one end of the elastic pipe is installed and connected to the first nozzle outlet of the first nozzle body, and the other end is installed and connected to the second nozzle inlet of the second nozzle base in the second nozzle body.

10. The dual cavitation nozzle based on Helmholtz resonance and Venturi effect according to any one of claims 6 to 8, characterized in that: When the second nozzle outlet of the second nozzle body is assembled and installed at the first nozzle inlet of the first nozzle body; a first nozzle is provided on the first nozzle outlet of the first nozzle body, and the elastic pipe is installed and connected between the first nozzle body and the first nozzle; the second nozzle outlet of the second nozzle top cover in the second nozzle body is installed and connected to the first nozzle inlet of the first nozzle body.

11. A dual cavitation flosser based on Helmholtz resonance and Venturi effect, characterized in that, The device includes a water flosser body and a dual cavitation nozzle based on Helmholtz resonance and Venturi effect as described in any one of claims 1 to 10; the dual cavitation nozzle based on Helmholtz resonance and Venturi effect is installed on the water outlet pipe of the water flosser body.

12. The application of a dual cavitation nozzle based on Helmholtz resonance and Venturi effect in cleaning equipment, characterized in that, The dual cavitation nozzle based on Helmholtz resonance and Venturi effect described in any one of claims 1 to 10 is installed in the spray pipeline of the cleaning equipment, which includes, but is not limited to, car wash equipment and atomizing equipment.

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