Cleaning equipment, cavitation jet cleaning device and control method

Abstract

This invention discloses a cleaning instrument, a cavitation jet cleaning device, and a control method. The cleaning instrument includes a nozzle, a tip electrode, a center electrode, and a motion component. Micropores are provided on the side of the nozzle near its working end, and a liquid injection port is also provided on the nozzle. The tip electrode is located at the working end of the nozzle, and the center electrode is located inside the nozzle. The center electrode has a first position in contact with the tip electrode and a second position separated from the tip electrode. The motion component is located above the nozzle and is used to connect to the center electrode, driving the center electrode to reciprocate between the first and second positions. A voltage provided by a first power source is applied between the tip electrode and the center electrode. When the tip electrode separates from the center electrode, plasma is generated between them due to the electrohydraulic effect; the plasma expands, driving the cleaning fluid to be ejected at high speed, forming a cavitation jet. This improves cleaning efficiency and the cleaning effect on the root canal wall, increases the cleaning range, and is less likely to damage the root canal wall.

Description

Technical Field

[0001] This invention relates to the field of oral treatment device technology, and in particular to a cleaning device, a cavitation jet cleaning device and a control method. Background Technology

[0002] Root canal treatment is currently a relatively ideal and mature treatment method for various diseases such as pulpitis, pulp necrosis, and tooth fracture. The main process involves using instruments to thoroughly clean the inside and walls of the diseased root canal, removing diseased tissue, and creating a complete and smooth root canal cavity. This completes the root canal preparation. Then, other materials, such as gutta-percha points, are filled into the prepared root canal to achieve the purpose of root canal repair and treatment.

[0003] Existing cleaning instruments have low cleaning efficiency, small cleaning range, poor cleaning effect on root canal walls, and are prone to damaging root canal walls. Summary of the Invention

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a tip discharge plasma-driven cleaning instrument, which improves cleaning efficiency and cleaning effect on the root canal wall, increases the cleaning range, and is less likely to damage the root canal wall.

[0005] The present invention also aims to provide a cavitation jet cleaning device driven by tip discharge plasma.

[0006] The present invention also aims to propose a control method for using the above-mentioned cavitation jet cleaning device.

[0007] According to a first aspect of the present invention, a tip discharge plasma-driven cleaning device includes a nozzle, a tip electrode, a center electrode, and a motion assembly. One end of the nozzle is a working end, and micro-holes are provided on the side of the nozzle near the working end. The nozzle also has an injection port for injecting cleaning fluid with a preset pressure to ensure that the cleaning fluid flows to the micro-holes. The tip electrode is disposed at the center of the working end of the nozzle, and the center electrode is disposed inside the nozzle and is movable. The center electrode has a first position in contact with the tip electrode and a second position separated from the tip electrode. The motion assembly is disposed above the nozzle and is used to connect to the center electrode to drive the center electrode to reciprocate between the first and second positions. A voltage provided by a first power source is applied between the tip electrode and the center electrode. Under the drive of the motion assembly, when the center electrode moves from the first position to the second position, the tip electrode and the center electrode change from a contact state to a separation state. Under the action of the voltage provided by the first power source, when the tip electrode and the center electrode separate, plasma is generated between the tip electrode and the center electrode due to the electrohydraulic effect. When the plasma expands, it drives the cleaning fluid to be ejected at high speed from the micro-holes on the side of the working end of the nozzle, forming a cavitation jet.

[0008] According to the tip discharge plasma-driven cleaning instrument of the present invention, the central electrode is moved from a first position to a second position by a motion component, and a voltage is applied between the tip electrode and the central electrode, so that plasma is generated at the gap between the tip electrode and the central electrode due to the electrohydraulic effect. The plasma expands and can drive the cleaning fluid to be ejected at high speed from the side micro-holes of the working end of the nozzle, forming a cavitation jet, which improves the cleaning efficiency and the cleaning effect on the root canal wall, increases the cleaning range, and is less likely to damage the root canal wall.

[0009] According to some embodiments of the present invention, the motion component may be a mechanism composed of an inductor coil and a magnet, a mechanism driven by a motor, or a mechanism driven by a shape memory alloy; the motion component is powered by a second power source.

[0010] According to some embodiments of the present invention, the motion component includes an inductor coil and a magnet. The inductor coil is disposed on the nozzle and connected to a second power source. The magnet is disposed on the central electrode and is located within the magnetic field formed after the inductor coil is energized.

[0011] According to some embodiments of the present invention, the other end of the nozzle is an open mounting end, through which the central electrode and the magnet are mounted into the nozzle; the cleaning device also includes a cap, which fits onto the mounting end; a groove cavity is formed between the cap and the nozzle, and an inductor coil is mounted in the groove cavity.

[0012] According to some embodiments of the present invention, the motion component further includes a reset elastic element, the two ends of which are respectively connected to the center electrode and the nozzle, and the reset elastic element is used to drive the center electrode to move to a first position.

[0013] According to some embodiments of the present invention, the reset elastic element is a spring, which is connected to the end of the central electrode away from the tip electrode; a limiting part is provided on the inner wall of the nozzle to restrict the movement direction of the central electrode.

[0014] According to some embodiments of the present invention, the diameter of the working end of the nozzle is between 0.2 mm and 3.0 mm, the diameter of the side micro-holes on the nozzle near the working end is between 0.05 mm and 0.5 mm, and the voltage applied between the tip electrode and the center electrode is no greater than 36 V.

[0015] The tip discharge plasma-driven cavitation jet cleaning device according to the second aspect of this application includes the tip discharge plasma-driven cleaning device, a first power supply, a second power supply, a liquid supply system, and a controller as described in the above embodiments. The first power supply is electrically connected to the tip electrode and the center electrode to form a discharge circuit. The second power supply is connected to the moving component electrical device to form a control circuit for the movement of the center electrode. The liquid supply system includes a liquid supply pipe, a drive component, and a liquid pressure sensor. The liquid supply pipe is connected to the injection port. The drive component is disposed on the liquid supply pipe to drive the cleaning liquid to flow toward the injection port. The liquid pressure sensor is used to detect the liquid pressure delivered to the nozzle. The controller is electrically connected to the liquid pressure sensor, the discharge circuit, and the control circuit for the movement of the center electrode.

[0016] The tip discharge plasma-driven cavitation jet cleaning device according to an embodiment of this application provides voltage for the occurrence of the electrohydraulic effect through a first power supply and a second power supply to drive the central electrode to move from a first position to a second position. A liquid supply system provides a continuous cleaning fluid to the cleaning device, enabling continuous cleaning operations. A controller provides a continuous supply of cleaning fluid at a preset pressure to the cleaning device and ensures that the first and second power supplies provide suitable voltages to induce the electrohydraulic effect between the tip electrode and the central electrode, generating plasma. The plasma is ejected through micropores, achieving a cavitation jet.

[0017] The control method of the cavitation jet cleaning apparatus of the above embodiments according to the third aspect of the present invention, wherein when the current in the discharge circuit reaches a certain set threshold, the controller outputs a command to the control circuit for the movement of the center electrode, which instructs the motion component to drive the center electrode to move to a second position, thereby achieving rapid separation of the center electrode from the tip electrode; when the current in the discharge circuit is 0, the controller outputs a second command to the second power supply, which instructs the motion component to drive the center electrode to move to a first position, thereby achieving re-contact between the center electrode and the tip electrode.

[0018] According to the control method of this application embodiment, the controller outputs a command to the control loop of the central electrode movement, causing the central electrode to switch back and forth between a first position and a second position, forming a variable-gap discharge mode. This allows a small voltage to be applied between the tip electrode and the central electrode to induce a hydroelectric effect, forming plasma, which improves cleaning efficiency and the cleaning effect on the root canal wall, increases the cleaning range, and is less likely to damage the root canal wall. At the same time, it offers high safety.

[0019] The control method of the cavitation jet cleaning device of the above embodiments according to the fourth aspect of the present invention is a drive motor, and includes the following steps: when the actual liquid pressure is lower than the preset hydraulic pressure, the controller controls the motor to increase the speed; when the actual liquid pressure is higher than the preset hydraulic pressure, the controller controls the motor to decrease the speed.

[0020] According to the control method of this application embodiment, by setting the driving component as a driving motor, the actual liquid pressure of the cleaning fluid can be changed. In this way, the motor speed can be controlled to change according to the relationship between the actual liquid pressure and the preset hydraulic pressure, so that the actual liquid pressure is equal to the preset hydraulic pressure, so as to realize the subsequent cavitation jet.

[0021] The control method of the cavitation jet cleaning device of the above embodiments according to the fourth aspect of the present invention includes the following steps: when the actual liquid pressure is lower than the preset hydraulic pressure, the control circuit of the controller controlling the discharge circuit and the central electrode movement stops working.

[0022] According to the control method of this application embodiment, the control circuit that controls the movement of the discharge circuit and the center electrode adjusts its working state according to the relationship between the actual liquid pressure and the preset hydraulic pressure, so as to avoid the ineffective operation of the control circuit of the discharge circuit and the center electrode movement.

[0023] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of one embodiment of the cleaning device according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of another embodiment of the cleaning device according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of another embodiment of the cleaning device according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of a driving method for a cleaning device according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of another driving method for a cleaning device according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of another driving method of the cleaning device according to an embodiment of the present invention;

[0030] Figure 7This is a schematic diagram of the structure of a cleaning device according to an embodiment of the present invention.

[0031] Figure label:

[0032] 100 cleaning instruments

[0033] Nozzle 10, working end 10a, mounting end 10b, micro-orifice 11, injection port 12, limiting part 13, cleaning fluid 14, wire 15.

[0034] Tip electrode 20, plasma 21

[0035] Central electrode 30

[0036] 40. Motion component; 41. Inductor coil; 42. Magnet; 43. Reset elastic element; 44. Rotary motor; 45. Lead screw; 46. Nut; 47. Linear motor

[0037] 50. Cover 50, 51.

[0038] Cleaning device 1000

[0039] First power supply 200, second power supply 300

[0040] Liquid supply system 400, liquid supply pipe 61, drive component 62, liquid pressure sensor 63

[0041] Controller 500. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0043] The following disclosure provides numerous different embodiments or examples for implementing various structures of the invention. To simplify the disclosure, specific examples of components and arrangements are described below. These are merely examples and are not intended to limit the invention. Furthermore, reference numerals and / or letters may be repeated in different examples. Such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. Additionally, examples of various specific processes and materials are provided in this invention; however, those skilled in the art will recognize the applicability of other processes and / or the use of other materials.

[0044] The following description, with reference to the accompanying drawings, describes a tip discharge plasma-driven cleaning device 100 and a tip discharge plasma-driven cavitation jet cleaning apparatus 1000 according to embodiments of the present invention.

[0045] Reference Figures 1-3 The first aspect of the present invention discloses a tip discharge plasma-driven cleaning device 100, comprising a nozzle 10, a tip electrode 20, a center electrode 30, and a motion assembly 40. One end of the nozzle 10 is a working end 10a. Microholes 11 are provided on the side of the nozzle 10 near the working end 10a. The nozzle 10 also has an injection port 12 for injecting a cleaning fluid 14 with a preset pressure to ensure that the cleaning fluid 14 flows to the microholes 11. The tip electrode 20 is disposed at the center of the working end 10a of the nozzle 10. The center electrode 30 is disposed within the nozzle 10 and is movable. The center electrode 30 has a first position in contact with the tip electrode 20 and a second position separated from the tip electrode 20. The motion assembly 40 is disposed on the nozzle 10. Above the tube 10, it is used to connect to the central electrode 30 and drive the central electrode 30 to reciprocate between the first position and the second position. A voltage provided by the first power supply is applied between the tip electrode 20 and the central electrode 30. Under the drive of the motion component 40, when the central electrode 30 moves from the first position to the second position, the tip electrode 20 and the central electrode 30 change from a contact state to a separation state. Under the action of the voltage provided by the first power supply, when the tip electrode 20 and the central electrode 30 separate, plasma 21 is generated between the tip electrode 20 and the central electrode 30 due to the electrohydraulic effect. When the plasma 21 expands, it drives the cleaning fluid 14 to be ejected at high speed from the side micro-hole 11 of the working end 10a of the nozzle 10, forming a cavitation jet.

[0046] Specifically, refer to Figures 1-3 This invention discloses a tip discharge plasma-driven cleaning device 100, comprising a nozzle 10 for storing cleaning fluid 14 and spraying the cleaning fluid 14 onto the root canal wall. One end of the nozzle 10 is a working end 10a, and micro-holes 11 are provided on the side of the nozzle 10 near the working end 10a, through which the cleaning fluid 14 can be sprayed. The micro-holes 11 can be provided on one side, multiple sides, or circumferentially on the nozzle 10. There can be one or more micro-holes 11. Preferably, there are multiple micro-holes 11, which are evenly distributed circumferentially along the nozzle 10. The nozzle 10 is also provided with an injection port 12 for injecting cleaning fluid 14 with a preset pressure. The injection port 12 can be located on the nozzle 10 at a position different from that of the micro-holes 11. For example, the injection port 12 can be located near the micro-holes 11, in the middle of the nozzle 10, or at the end of the nozzle 10 away from the working end 10a. Preferably, the injection port 12 is located at the end of the nozzle 10 away from the micropore 11. The cleaning fluid 14 flows toward the micropore 11 so that when the plasma 21 expands, the cleaning fluid 14 flowing to the vicinity of the micropore 11 can be ejected from the micropore 11.

[0047] Reference Figures 1-3The tip electrode 20 is disposed at the center of the working end 10a of the nozzle 10, and the center electrode 30 is disposed inside the nozzle 10 and is movable. The center electrode 30 has a first position that contacts the tip electrode 20 and a second position that is separated from the tip electrode 20. By movably disposing the center electrode 30 inside the nozzle 10, the center electrode 30 can contact and separate from the tip electrode 20 disposed at the working end 10a of the nozzle 10.

[0048] Reference Figures 1-3 The motion component 40 is disposed above the nozzle 10 and is used to connect with the central electrode 30, driving the central electrode 30 to reciprocate between a first position and a second position. By setting the motion component 40 and connecting the motion component 40 to the central electrode 30, the motion component 40 can drive the central electrode 30 to move, facilitating the switching of the central electrode 30 between the first position and the second position.

[0049] Reference Figures 1-3 A voltage supplied by a first power source is applied between the tip electrode 20 and the center electrode 30 to create a hydroelectric effect between them, thereby generating plasma 21. Driven by the motion component 40, when the center electrode 30 moves from the first position to the second position, the tip electrode 20 and the center electrode 30 change from a contact state to a separation state. Under the action of the voltage supplied by the first power source, a hydroelectric effect occurs at the gap, generating plasma 21. The plasma 21 expands, which can drive the cleaning fluid 14 to be ejected at high speed from the side micro-holes 11 of the working end 10a of the nozzle 10, forming a cavitation jet, which improves the cleaning efficiency and the cleaning effect on the root canal wall, increases the cleaning range, and is less likely to damage the root canal wall.

[0050] Therefore, referring to Figures 1-3 According to the tip discharge plasma-driven cleaning device 100 of the present invention, the central electrode 30 is moved from a first position to a second position by the motion component 40, and a voltage is applied between the tip electrode 20 and the central electrode 30, so that plasma 21 is generated at the gap between the tip electrode 20 and the central electrode 30 due to the electrohydraulic effect. The plasma 21 expands and can drive the cleaning fluid 14 to be ejected at high speed from the side micro-hole 11 of the working end 10a of the nozzle 10, forming a cavitation jet, which improves the cleaning efficiency and the cleaning effect on the root canal wall, increases the cleaning range, and is less likely to damage the root canal wall.

[0051] It should be noted that the preset pressure is the pressure required for the cleaning fluid 14 to be ejected from the micropores 11 to form a cavitation jet.

[0052] In some embodiments, the first power supply 200 can be directly connected to the tip electrode 20 and the center electrode 30, or it can be indirectly connected. For example, refer to... Figure 1One end of the first power supply 200 can be connected to the nozzle 10, and the other end can be connected to the reset elastic element 43. The reset elastic element 43 is connected to the center electrode 30 via a wire 15. At this time, the part of the nozzle 10 except for the cap 50 and the reset elastic element 43 are conductive, while the cap 50 is an insulating component. (Refer to...) Figure 2 One end of the first power supply 200 can be connected to the tip electrode 20 via a wire 15 embedded in the side wall of the nozzle 10, and the other end is connected to the reset elastic element 43. The reset elastic element 43 is connected to the center electrode 30 via the wire 15. In this case, the nozzle 10 is an insulating component, and the reset elastic element 43 is a conductive component. (Refer to...) Figure 3 One end of the first power supply 200 can be connected to the tip electrode 20 via a wire 15 embedded in one side of the nozzle 10 sidewall, and the other end can be connected to a limiting part 13 via a wire 15 embedded in the other side of the nozzle 10 sidewall. The limiting part 13 is in contact with the center electrode 30. At this time, the cover 50 and the nozzle 10 are both insulating components, and the limiting part 13 is a conductive component.

[0053] In some embodiments of the present invention, the motion component 40 may be a mechanism composed of an inductor coil 41 and a magnet 42, a mechanism driven by a motor, or a mechanism driven by a shape memory alloy; the motion component 40 is powered by a second power source.

[0054] Reference Figures 4-6 Applying a voltage across the inductor coil 41 generates a magnetic field. This magnetic field causes the magnet 42 to move relative to the inductor coil 41. By connecting the magnet 42 to the center electrode 30, the center electrode 30 can be moved from a first position to a second position. The electrode driving mechanism can be directly connected to the center electrode 30 to drive it from the first position to the second position.

[0055] Specifically, refer to Figures 4-6 The motor-driven mechanism can be either a rotary motor 44 or a linear motor 47. When using a rotary motor 44, the rotary motor 44 can be connected to the outside of the cover 50, with its output end passing through the cover 50 and connected to the center electrode 30. A lead screw 45 and a nut 46 can be installed between the output end and the center electrode 30, allowing the output end of the rotary motor 44 to switch the center electrode 30 between a first position and a second position. When using a linear motor 47, the linear motor can be connected to the outside of the cover 50, with its output end passing through the cover 50 and connected to the center electrode 30. The output end and the center electrode 30 can be fixedly connected or detachably connected, etc.

[0056] It should be noted that the shape memory alloy driven mechanism refers to a mechanism made of a special alloy. Once this alloy has memorized a certain shape, even if it is deformed, it can recover to the memorized shape before deformation when heated to a certain temperature. Through the memory properties of this alloy, its shape can be changed by heating it. The change in shape will change the position of the central electrode 30 connected to it, allowing it to move from a first position to a second position, thereby achieving the driving function.

[0057] Of course, this application is not limited to this; in other embodiments, the motion component 40 may also be other types of mechanisms, as long as they can drive the central electrode 30 to move from the first position to the second position.

[0058] In some embodiments of the present invention, reference is made to... Figure 4 The motion component 40 includes an inductor coil 41 and a magnet 42. The inductor coil 41 is mounted on the nozzle 10 and connected to a second power source. The magnet 42 is mounted on the central electrode 30 and is located within the magnetic field formed by the inductor coil 41 after it is energized. A voltage can be applied to the inductor coil 41 via the second power source, generating a magnetic field around the inductor coil 41. This magnetic field attracts or repels the inductor coil 41, thereby moving the central electrode 30.

[0059] In some embodiments of the present invention, reference is made to... Figures 1-3 The other end of the nozzle 10 is an open mounting end 10b, through which the center electrode 30 and magnet 42 are installed into the nozzle 10; the cleaning device 100 also includes a cover 50, which fits onto the mounting end 10b; a wire groove cavity 51 is formed between the cover 50 and the nozzle 10, and the inductor coil 41 is installed in the wire groove cavity 51.

[0060] The other end of the nozzle 10 is an open mounting end 10b, which facilitates the installation of the center electrode 30 and the magnet 42 into the nozzle 10 through the open end. A cap 50 fits onto the mounting end 10b, closing it off. A slotted cavity 51 is formed between the cap 50 and the nozzle 10, which can be used to mount the inductor coil 41. The slotted cavity 51 can be located at the end of the nozzle 10 or on the side of the nozzle 10. In this application, the cap 50 is fitted onto the end of the nozzle 10, and the side and bottom surfaces of the cap 50, together with the side surface of the nozzle 10, form the slotted cavity 51.

[0061] In some embodiments of the present invention, reference is made to... Figures 1-4The motion component 40 also includes a reset elastic element 43, with its two ends connected to the central electrode 30 and the nozzle 10, respectively. The reset elastic element 43 is used to drive the central electrode 30 to move to the first position. By providing the reset elastic element 43, the central electrode 30 can be restored from the second position to the first position, thus allowing the central electrode 30 to move from the first position to the second position again, triggering the electrohydraulic effect again.

[0062] Specifically, refer to Figures 1-4 One end of the reset elastic element 43 is connected to the cover 50, and the other end is connected to the end of the center electrode 30 away from the tip electrode 20. The reset elastic element 43 is in a compressed state when the center electrode 30 is in the second position.

[0063] Of course, it is understandable that the reset elastic element 43 can also be connected at one end to the side wall of the nozzle 10 and at the other end to the central electrode 30. It can be connected to the end of the central electrode 30 away from the tip electrode 20, or it can be connected to the side of the central electrode 30. When the central electrode 30 is in the second position, the reset elastic element 43 can be in a compressed state or a stretched state.

[0064] In some embodiments of the present invention, reference is made to... Figures 1-3 The reset elastic element 43 is a spring, which is connected to the end of the center electrode 30 away from the tip electrode 20; a limiting part 13 is provided on the inner wall of the nozzle 10 to restrict the movement direction of the center electrode 30. By providing the limiting part 13 to restrict the movement direction of the center electrode 30 on the inner wall of the nozzle 10, the center electrode 30 can move in a certain direction, thereby improving the stability of the movement.

[0065] It is understood that one or more limiting parts 13 can be provided. When multiple limiting parts 13 are provided, the limiting parts 13 can be spaced apart along the length direction of the nozzle 10; or they can be multiple groups spaced apart along the length direction of the nozzle 10, wherein each group has multiple limiting parts 13, and the multiple limiting parts 13 in each group can be provided on opposite sides of the inner wall of the nozzle 10, or they can be spaced apart circumferentially along the inner wall of the nozzle 10, or they can be uniformly provided circumferentially along the inner wall of the nozzle 10.

[0066] The limiting part 13 and the center electrode 30 can be in point-to-point contact, line-to-line contact, or face-to-face contact. When the limiting part 13 and the center electrode 30 are in line-to-line contact or face-to-face contact, the contact line between the limiting part 13 and the center electrode 30 is arc-shaped, and the contact surface is an arc surface.

[0067] Preferably, multiple sets of limiting parts 13 are provided at intervals along the length direction of the nozzle 10, and each set of limiting parts 13 is arranged around the central electrode 30, and the multiple limiting parts 13 in each set are evenly distributed along the circumference of the central electrode 30.

[0068] In some embodiments, the reset elastic element 43 may also be other elastic structures. For example, it may be a torsion bar elastic element, a gas elastic element, or a rubber elastic element.

[0069] In some embodiments of the present invention, the diameter of the working end 10a of the nozzle 10 ranges from 0.2 mm to 3.0 mm, the diameter of the side micro-holes 11 adjacent to the working end 10a of the nozzle 10 ranges from 0.05 mm to 0.5 mm, and the voltage applied between the tip electrode 20 and the center electrode 30 is no greater than 36 V. By setting the diameter of the working end 10a of the nozzle 10 to between 0.2 mm and 3.0 mm, it is easier to insert the nozzle 10 into the root canal. Setting the diameter of the side micro-holes 11 adjacent to the working end 10a of the nozzle 10 to between 0.05 mm and 0.5 mm allows the cleaning fluid 14 to form a cavitation jet after being sprayed from the micro-holes 11, improving cleaning efficiency and the cleaning effect on the root canal wall, increasing the cleaning range, and reducing the risk of damage to the root canal wall. By setting the voltage applied between the tip electrode 20 and the center electrode 30 to no greater than 36 V, a hydroelectric effect can occur between the tip electrode 20 and the center electrode 30, and the voltage is not too high, improving the safety of use.

[0070] Specifically, the diameter of the working end 10a of the nozzle 10 can range from 0.2mm, 0.4mm, 0.7mm, 1.2mm, 2.5mm, 3.0mm, etc. The diameter of the side micro-holes 11 on the nozzle 10 adjacent to the working end 10a can be 0.05mm, 0.15mm, 0.2mm, 0.25mm, 0.3mm, 0.45mm, 0.5mm, etc. The voltage applied between the tip electrode 20 and the center electrode 30 can be 36V, 34V, 30V, 26V, 24V, 22V, 20V, etc. Preferably, the voltage applied between the tip electrode 20 and the center electrode 30 is no greater than 24V.

[0071] In some embodiments, the microholes 11 may be provided on at least one of the side surface and bottom surface of the nozzle 10 near the working end 10a. Preferably, the microholes 11 are provided on the side surface and bottom surface of the nozzle 10 near the working end 10a.

[0072] In some embodiments, the inner diameter of the working end 10a of the nozzle 10 ranges from 0.15 mm to 2.8 mm, and the outer diameter of the central electrode 30 ranges from 0.12 mm to 1.2 mm. This allows the nozzle 10 to have a certain accommodating cavity to accommodate the cleaning fluid 14 and the central electrode 30. By setting the outer diameter of the central electrode 30 to 0.12 mm to 1.2 mm, the central electrode 30 can move freely within the nozzle 10.

[0073] Specifically, the inner diameter of the working end 10a of the nozzle 10 can be 0.15mm, 0.25mm, 0.45mm, 0.9mm, 1.5mm, 1.7mm, 2.1mm, 2.5mm, 2.8mm, etc. The outer diameter of the center electrode 30 can be 0.12mm, 0.15mm, 0.18mm, 0.35mm, 0.50mm, 0.70mm, 0.95mm, 1.2mm, etc.

[0074] Reference Figure 7 The tip discharge plasma-driven cavitation jet cleaning device 1000 of the second aspect of the present invention includes the tip discharge plasma-driven cleaning device 100 of the above embodiment, a first power supply 200, a second power supply 300, a liquid supply system 400 and a controller 500. The first power supply 200 is electrically connected to the tip electrode 20 and the center electrode 30 to form a discharge circuit. The second power supply 300 is electrically connected to the motion component 40 to form a control circuit for the movement of the center electrode 30. The liquid supply system 400 includes a liquid supply pipe 61, a drive component 62 and a liquid pressure sensor 63. The liquid supply pipe 61 is connected to the injection port 12. The drive component 62 is disposed on the liquid supply pipe 61 to drive the cleaning liquid 14 to flow toward the injection port 12. The liquid pressure sensor 63 is used to detect the liquid pressure delivered to the nozzle 10. The controller 500 is electrically connected to the liquid pressure sensor 63, the discharge circuit and the control circuit for the movement of the center electrode 30.

[0075] Specifically, refer to Figure 7 The first power supply 200 is electrically connected to the tip electrode 20 and the center electrode 30 to form a discharge circuit, which provides voltage for the occurrence of the electrohydraulic effect when the tip electrode 20 and the center electrode 30 are separated. The second power supply 300 is connected to the electrical components of the motion component 40 to form a control circuit for the movement of the center electrode 30, so as to drive the motion component 40 to move, thereby causing the center electrode 30 to move from the first position to the second position.

[0076] The liquid supply system 400 is used to provide cleaning fluid 14 to the cleaning instrument 100 so that the cleaning instrument 100 can continuously perform cleaning work.

[0077] Reference Figure 7The liquid supply system 400 includes a supply pipe 61 connected to an injection port 12. This connection allows liquid to flow from the supply pipe 61 through the injection port 12 into the nozzle 10. The supply pipe 61 and the nozzle 10 can be arranged perpendicularly. The liquid supply system 400 also includes a drive unit 62 mounted on the supply pipe 61 to drive the cleaning fluid 14 towards the injection port 12. The drive unit 62 facilitates the flow of the cleaning fluid 14 towards the injection port 12. Different drive powers can be set on the drive unit 62 to control the flow rate of the cleaning fluid 14 towards the injection port 12. The liquid supply system 400 also includes a liquid pressure sensor 63, which detects the liquid pressure supplied to the nozzle 10. The drive unit 62 then adjusts the liquid pressure to ensure the actual liquid pressure meets requirements, which is beneficial for forming a cavitation jet.

[0078] Reference Figure 7 The controller 500 is electrically connected to the liquid pressure sensor 63, the discharge circuit, and the control circuit for the movement of the central electrode 30. The controller 500 can control the discharge circuit and the control circuit for the movement of the central electrode 30, as well as control the power of the drive unit 62, so that the actual liquid pressure meets the preset pressure. In this way, the electrohydraulic effect can occur between the tip electrode 20 and the central electrode 30, generating plasma 21. The plasma 21 is ejected from the microhole 11, thereby realizing a cavitation jet.

[0079] According to an embodiment of this application, a tip discharge plasma-driven cavitation jet cleaning device 1000 provides voltage for the occurrence of the electrohydraulic effect through a first power supply 200 and a second power supply 300 to drive the central electrode 30 from a first position to a second position. A liquid supply system 400 provides a continuous cleaning fluid 14 to the cleaning device 100 so that the cleaning device 100 can continuously perform cleaning work. A controller 500 is provided to provide a continuous supply of cleaning fluid 14 at a preset pressure to the cleaning device 100 and to ensure that the first power supply 200 and the second power supply 300 provide suitable voltages so that the electrohydraulic effect occurs between the tip electrode 20 and the central electrode 30, generating plasma 21. The plasma 21 is ejected from the micropores 11 to realize cavitation jet.

[0080] The control method of the cavitation jet cleaning apparatus 1000 of the above embodiments according to the third aspect of the present invention, wherein when the current in the discharge circuit reaches a certain set threshold, the controller 500 outputs a command to the control circuit for the movement of the center electrode 30, and commands the motion component 40 to drive the center electrode 30 to move to a second position, thereby achieving rapid separation of the center electrode 30 from the tip electrode 20; when the current in the discharge circuit is 0, the controller 500 outputs a second command to the second power supply, and commands the motion component 40 to drive the center electrode 30 to move to a first position, thereby achieving re-contact between the center electrode 30 and the tip electrode 20.

[0081] According to the control method of this application embodiment, the controller 500 outputs a command to the control loop of the central electrode 30, causing the central electrode 30 to switch back and forth between a first position and a second position, forming a variable-gap discharge mode. This allows a small voltage to be applied between the tip electrode 20 and the central electrode 30 to induce a hydroelectric effect, forming plasma 21. This improves cleaning efficiency and the cleaning effect on the root canal wall, increases the cleaning range, and is less likely to damage the root canal wall. Furthermore, it offers high safety.

[0082] The control method of the fourth aspect of the present invention applied to the cavitation jet cleaning device 1000 of the above embodiment, wherein the driving component 62 is a driving motor, includes the following steps: when the actual liquid pressure is lower than the preset hydraulic pressure, the controller 500 controls the motor to increase the speed; when the actual liquid pressure is higher than the preset hydraulic pressure, the controller 500 controls the motor to decrease the speed.

[0083] According to the control method of this application embodiment, by setting the drive unit 62 as a drive motor, the actual liquid pressure of the cleaning fluid 14 can be changed. In this way, the motor speed can be controlled to change according to the relationship between the actual liquid pressure and the preset hydraulic pressure, so that the actual liquid pressure is equal to the preset hydraulic pressure, so as to realize the subsequent cavitation jet.

[0084] The control method of the fourth aspect of the present invention applied to the cavitation jet cleaning device 1000 of the above embodiment includes the following steps: when the actual liquid pressure is lower than the preset hydraulic pressure, the controller 500 controls the control circuit of the discharge circuit and the control circuit of the center electrode 30 to stop working.

[0085] According to the control method of this application embodiment, the control circuit that controls the movement of the discharge circuit and the center electrode 30 by the controller 500 adjusts the working state according to the relationship between the actual liquid pressure and the preset hydraulic pressure, so as to avoid the ineffective operation of the control circuit that controls the movement of the discharge circuit and the center electrode 30.

[0086] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0087] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0088] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0089] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0090] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A cleaning device driven by tip discharge plasma, characterized in that, Cleaning for the root canal walls includes: The nozzle (10) has a working end (10a) at one end. A microhole (11) is provided on the side of the nozzle (10) near the working end (10a). The nozzle (10) is also provided with an injection port (12). The injection port (12) is used to inject cleaning fluid (14) with a preset hydraulic pressure to ensure that the cleaning fluid (14) flows to the microhole (11). A tip electrode (20) is disposed at the center of the working end (10a) of the nozzle (10); A central electrode (30) is disposed within the nozzle (10) and is movable. The central electrode (30) has a first position in contact with the tip electrode (20) and a second position separated from the tip electrode (20). A motion component (40) is disposed above the nozzle (10) and is used to connect with the central electrode (30) to drive the central electrode (30) to reciprocate between the first position and the second position; A voltage supplied by a first power supply is applied between the tip electrode (20) and the center electrode (30). Driven by the motion component (40), when the center electrode (30) moves from the first position to the second position, the tip electrode (20) and the center electrode (30) change from a contact state to a separation state. Under the action of the voltage supplied by the first power supply, when the tip electrode (20) and the center electrode (30) separate, plasma (21) is generated between the tip electrode (20) and the center electrode (30) due to the electrohydraulic effect. When the plasma (21) expands, it will drive the cleaning fluid (14) to be ejected at high speed from the side micro-hole (11) of the working end (10a) of the nozzle (10), forming a cavitation jet. The diameter of the side micro-holes (11) on the nozzle (10) near the working end (10a) is between 0.05 mm and 0.5 mm, and the voltage applied between the tip electrode (20) and the center electrode (30) is no greater than 36 V.

2. The tip discharge plasma-driven cleaning device according to claim 1, characterized in that, The motion component (40) is a mechanism composed of an inductor coil (41) and a magnet (42), or a mechanism driven by a motor, or a mechanism driven by a shape memory alloy; the motion component (40) is powered by a second power supply.

3. The tip discharge plasma-driven cleaning device according to claim 2, characterized in that, The motion component (40) includes: An inductor coil (41) is provided on the nozzle (10) and the inductor coil (41) is connected to the second power supply. A magnet (42) is disposed on the central electrode (30) and is located in the magnetic field formed after the inductor coil (41) is energized.

4. The tip discharge plasma-driven cleaning device according to claim 3, characterized in that, The other end of the nozzle (10) is an open mounting end (10b), through which the central electrode (30) and the magnet (42) are mounted into the nozzle (10); The cleaning device also includes a cover (50) that fits onto the mounting end (10b); A groove cavity (51) is formed between the cover (50) and the nozzle (10), and the inductor coil (41) is installed in the groove cavity (51).

5. The tip discharge plasma-driven cleaning device according to claim 1, characterized in that, The motion component (40) further includes a reset elastic element (43), the two ends of which are respectively connected to the center electrode (30) and the nozzle (10), and the reset elastic element (43) is used to drive the center electrode (30) to move to the first position.

6. The tip discharge plasma-driven cleaning device according to claim 5, characterized in that, The reset elastic element (43) is a spring, which is connected to the end of the center electrode (30) away from the tip electrode (20); The inner wall of the nozzle (10) is provided with a limiting part (13) to restrict the movement direction of the central electrode (30).

7. The tip discharge plasma-driven cleaning device according to any one of claims 1-6, characterized in that, The diameter of the working end (10a) of the nozzle (10) ranges from 0.2 mm to 3.0 mm.

8. A cavitation jet cleaning device driven by tip discharge plasma, characterized in that, include: The tip discharge plasma-driven cleaning device (100) according to any one of claims 1-7. The first power supply (200) is electrically connected to the tip electrode (20) and the center electrode (30) to form a discharge circuit; The second power supply (300) is connected to the electrical components of the motion component (40) to form a control loop for the movement of the central electrode (30); A liquid supply system (400) includes a supply pipe (61), a drive unit (62), and a liquid pressure sensor (63). The supply pipe (61) is connected to the injection port (12). The drive unit (62) is disposed on the supply pipe (61) to drive the cleaning fluid (14) to flow toward the injection port (12). The liquid pressure sensor (63) is used to detect the liquid pressure supplied to the nozzle (10). The controller (500) is electrically connected to the liquid pressure sensor (63), the discharge circuit, and the control circuit for the movement of the central electrode (30).

9. A control method applied to the cavitation jet cleaning device according to claim 8, characterized in that, When the current in the discharge circuit reaches a certain set threshold, the controller (500) outputs a command to the control circuit for the movement of the center electrode (30), instructing the motion component (40) to drive the center electrode (30) to move to the second position, thereby realizing the rapid separation of the center electrode (30) from the tip electrode (20). When the current in the discharge circuit is 0, the controller (500) outputs a second command to the second power supply, instructing the motion component (40) to drive the center electrode (30) to move to the first position, so as to achieve the re-contact of the center electrode (30) with the tip electrode (20).

10. A control method applied to the cavitation jet cleaning apparatus according to claim 8, characterized in that, The driving component (62) is a drive motor, and includes the following steps: When the actual liquid pressure is lower than the preset hydraulic pressure, the controller (500) controls the motor to increase its speed; When the actual liquid pressure is higher than the preset hydraulic pressure, the controller (500) controls the motor to reduce its speed.

11. A control method applied to the cavitation jet cleaning apparatus according to claim 8, characterized in that, Includes the following steps: When the actual liquid pressure is lower than the preset hydraulic pressure, the controller (500) stops working on the control circuit that controls the movement of the discharge circuit and the center electrode (30).

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