Cavitation jet oral irrigator

Abstract

The invention discloses a cavitation jet oral irrigator which comprises an oral irrigator body, a water storage tank, an electric water pump, a rechargeable battery and a cavitation jet nozzle, a containing groove is formed in the side wall of the lower end of the oral irrigator body, the water storage tank is detachably embedded in the containing groove, and the electric water pump and the rechargeable battery are arranged in the oral irrigator body. The cavitation jet nozzle is detachably arranged at the upper end of the oral irrigator body, a water inlet of the electric water pump is communicated with the water storage tank, a water outlet of the electric water pump is communicated with the cavitation jet nozzle, a key and a charging interface are arranged on the peripheral wall of the oral irrigator body, and the rechargeable battery is electrically connected with the electric water pump, the key and the charging interface. The cavitation jet nozzle comprises a jet channel, a resonant cavity, a cavitation chamber and a nozzle which are sequentially communicated from bottom to top. According to the technical scheme, stubborn stains on the surfaces of teeth and in slits between the teeth can be more effectively removed, and compared with a traditional jet-flow oral irrigator, the oral irrigating experience is better, the strength is milder, and gingival bleeding cannot be caused.

Description

Technical Field

[0001] The present invention relates to the technical field of oral irrigators, and in particular to a cavitation jet oral irrigator. Background Art

[0002] An oral irrigator, also known as a water flosser, is an auxiliary oral cleaning tool that uses a pulsed stream of water to clean teeth and the spaces between teeth. It comes in portable and desktop models, and typically uses a pressure range of 0 to 90 psi. An oral irrigator uses pressurized water to clean teeth and the spaces between teeth, making it significantly different from an electric toothbrush.

[0003] However, most of the existing water flossers on the market are pulse-type water flossers, which use a water pump to generate high-pressure pulse water flow, which impacts the teeth and the gaps between teeth through the nozzle. This pulse water flow has appropriate impact force and correct usage posture, which can effectively clean food debris and dental plaque on the surface of teeth and in the gaps between teeth. The working principle of the pulse water flosser is mainly to use the physical method of teeth cleaning to wash away dental plaque and tartar with high-pressure water flow. The pulse water flosser mainly relies on the impact force of high-pressure water flow to clean teeth, and has a better cleaning effect on large stains and food debris on the surface of teeth. However, due to the characteristics of the pulse water flow, its cleaning effect on the gaps and dead corners of teeth may not be ideal. It cannot effectively deliver water flow into the gaps and dead corners of teeth, and cannot remove dental plaque and stains hidden in these hard-to-reach areas. In addition, the cleaning process of the pulse water flosser is not gentle enough and the cleaning force is high. It will produce a strong impact and noise when used, which may make some users feel uncomfortable. It will cause strong impact and wear on the surface of the teeth. The impact force is too great and it is easy to damage the teeth. The comfort is greatly reduced and the user experience is poor. Summary of the Invention

[0004] The main purpose of the present invention is to provide a cavitation jet dental flosser, aiming to solve the problems raised in the background technology.

[0005] To achieve the above-mentioned objectives, the cavitation jet irrigator proposed in the present invention includes an irrigator body, a water tank, an electric water pump, a rechargeable battery and a cavitation jet nozzle. The side wall of the lower end of the irrigator body is provided with a receiving groove, and the water tank is detachably embedded in the receiving groove. The electric water pump and the rechargeable battery are arranged in the irrigator body, and the cavitation jet nozzle is detachably arranged at the upper end of the irrigator body. The water inlet of the electric water pump is connected with the water tank, and the water outlet of the electric water pump is connected with the cavitation jet nozzle. The outer peripheral wall of the irrigator body is provided with a button and a charging interface. The rechargeable battery is electrically connected to the electric water pump, the button and the charging interface. The internal cavity of the cavitation jet nozzle is composed of a jet channel, a resonance cavity, a cavitation chamber and a nozzle from bottom to top.

[0006] Optionally, the diameter of the jet channel is D S , the diameter of the resonant cavity is D, the length of the resonant cavity is L, the diameter of the cavitation chamber is d, and the length of the cavitation chamber is l , the expansion angle of the nozzle is α, the D S ,D,L,d, l And α follows the formula: Where, is the modulus coefficient in the resonant cavity; N -Number of oscillation modes in the resonant cavity, is the jet Mach number, dimensionless; is the jet velocity; is the propagation speed of sound waves in the fluid medium; is the critical Strouhal number, dimensionless, and can be 0.3 or 0.6.

[0007] Optionally, the diameter of the jet channel ranges from 3.8 mm to 4.2 mm.

[0008] Optionally, the diameter of the resonant cavity ranges from 1.4 mm to 1.6 mm, and the length of the resonant cavity ranges from 10.5 mm to 11.5 mm.

[0009] Optionally, the diameter of the cavitation chamber ranges from 0.4 mm to 0.6 mm, and the length of the cavitation chamber ranges from 0.8 mm to 1.2 mm.

[0010] Optionally, the nozzle is arranged in a conical structure, the expansion angle of the nozzle is in the range of 36° to 40°, and the surface roughness Ra of the internal cavity of the cavitation jet nozzle is in the range of 0.016 μm to 0.032 μm.

[0011] Optionally, it also includes a pressing piece and a locking piece. The pressing piece can be slidably arranged on the side wall of the upper end of the water flosser body. The upper end of the water flosser body is provided with a plug-in slot. The locking piece can be slidably arranged at the upper end of the plug-in slot. The rear end of the pressing piece abuts against the locking piece. The upper end of the locking piece is recessed with a waist-shaped hole. The lower end of the cavitation jet nozzle is passed through the waist-shaped hole and is detachably embedded in the plug-in slot. The inner side wall of the waist-shaped hole is provided with a snap protrusion along the circumferential direction. The lower end of the cavitation jet nozzle is recessed with a snap groove along the circumferential direction. The snap protrusion is detachably embedded in the snap groove.

[0012] Optionally, it also includes an upper cover plate, which is arranged at the upper end of the locking piece, and the lower end wall of the upper cover plate abuts against the upper end wall of the locking piece. The upper end of the upper cover plate is provided with a through hole, which is located above the plug-in slot, and the lower end of the cavitation jet nozzle can be passed through the through hole.

[0013] Optionally, an elastic part is also included, the rear end of the locking part is recessed with a through groove, the inner side wall of the through groove is protruded with a limiting column, the elastic part is sleeved on the limiting column, the rear end of the plug-in slot is protruded with a limiting plate, and the rear end of the elastic part abuts against the limiting plate.

[0014] Optionally, the inner circumferential wall of the snap protrusion is provided with a plurality of sawtooth-shaped limiting protrusions, and the bottom of the snap groove is provided with a plurality of sawtooth-shaped limiting grooves along the circumferential direction, and the sawtooth-shaped limiting protrusions are detachably embedded in the sawtooth-shaped limiting grooves.

[0015] The technical solution of the present invention has the following beneficial effects: The present invention uses an electric water pump to deliver water from a water tank into the jet channel of the cavitation jet nozzle. The jet channel accelerates and stabilizes the water flow during its flow, ensuring that the water has appropriate speed and pressure when it reaches the resonant cavity. As the water continues to flow through the resonant cavity, it generates self-excited pressure vibrations, which are fed back into the resonant cavity to form feedback pressure oscillations. Here, cavitation nuclei are formed, which are the starting points for the formation of cavitation bubbles in the fluid. When the water flows through the cavitation chamber, the local pressure drop of the water flow causes the liquid to vaporize and form cavitation bubbles. Finally, a large-structured intermittent vortex circulation and a high-intensity spray cavitation bubble jet are generated at the nozzle outlet. These cavitation bubbles collapse when they contact the surface of an object (such as teeth or gums), achieving a cleaning effect. The collapse of the cavitation bubbles produces a strong local impact, which helps to remove food debris and dental plaque between teeth and promotes blood circulation in the gums. Compared with traditional jet irrigators, the cavitation jet irrigator of the present invention provides a better irrigating experience, has a gentler force, does not cause bleeding gums, can effectively remove tartar caused by smoking and drinking tea, has the effect of whitening teeth, and effectively improves the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0017] Figure 1 This is a schematic diagram of the overall structure of a cavitation jet dental flosser according to one embodiment of the present invention; Figure 2A schematic diagram of the overall structure of a cavitation jet dental flosser according to an embodiment of the present invention from another perspective; Figure 3 This is a schematic diagram of the exploded structure of a cavitation jet dental flosser according to one embodiment of the present invention; Figure 4 This is a schematic diagram of a partially exploded structure of a cavitation jet dental flosser according to one embodiment of the present invention; Figure 5 Schematic diagram of the cross-sectional structure of a cavitation jet nozzle of a cavitation jet dental flosser according to one embodiment of the present invention; Figure 6 This is another schematic cross-sectional structure diagram of a cavitation jet nozzle of a cavitation jet dental flosser according to an embodiment of the present invention.

[0018] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0021] In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0022] The present invention provides a cavitation jet dental flosser.

[0023] like Figures 1 to 6As shown, in one embodiment of the present invention, the cavitation jet water flosser includes a water flosser body 101, a water storage tank 102, an electric water pump (not shown), a rechargeable battery (not shown) and a cavitation jet nozzle 103. The side wall of the lower end of the water flosser body 101 is provided with a receiving groove 1011, the water storage tank 102 is detachably embedded in the receiving groove 1011, the electric water pump and the rechargeable battery are arranged in the water flosser body 101, and the cavitation jet nozzle 103 is detachably arranged on the water flosser body. At the upper end of the body 101, the water inlet of the electric water pump is connected to the water tank 102, and the water outlet of the electric water pump is connected to the cavitation jet nozzle 103. The outer peripheral wall of the irrigator body 101 is provided with a button 1012 and a charging interface 1013. The rechargeable battery is electrically connected to the electric water pump, the button 1012 and the charging interface 1013. The internal cavity of the cavitation jet nozzle 103 is composed of a jet channel 1031, a resonance cavity 1032, a cavitation chamber 1033 and a nozzle 1034 from bottom to top.

[0024] Specifically, the diameter of the jet channel 1031 is D S The diameter of the resonant cavity 1032 is D, the length of the resonant cavity 1032 is L, the diameter of the cavitation chamber 1033 is d, and the length of the cavitation chamber 1033 is l , the expansion angle of the nozzle 1034 is α, the D S ,D,L,d, l And α follows the formula: Where, is the modulus coefficient in the resonant cavity; N -Number of oscillation modes in the resonant cavity, is the jet Mach number, dimensionless; is the jet velocity; is the propagation speed of sound waves in the fluid medium; is the critical Strouhal number, dimensionless, and can be 0.3 or 0.6.

[0025] Specifically, the diameter of the jet channel 1031 ranges from 3.8 mm to 4.2 mm.

[0026] Specifically, the diameter of the resonant cavity 1032 ranges from 1.4 mm to 1.6 mm, and the length of the resonant cavity 1032 ranges from 10.5 mm to 11.5 mm.

[0027] Specifically, the diameter of the cavitation chamber 1033 ranges from 0.4 mm to 0.6 mm, and the length of the cavitation chamber 1033 ranges from 0.8 mm to 1.2 mm.

[0028] Specifically, the expansion angle of the nozzle 1034 ranges from 36° to 40°.

[0029] Specifically, it also includes a pressing member 104 and a locking member 105. The pressing member 104 is slidably arranged on the side wall of the upper end of the oral irrigator body 101. The upper end of the oral irrigator body 101 is provided with a plug-in slot 1014. The locking member 104 is slidably arranged at the upper end of the plug-in slot 1014. The rear end of the pressing member 104 abuts against the locking member 105. The upper end of the locking member 105 is concavely provided with a waist-shaped hole 1051. The lower end of the cavitation jet nozzle 103 is inserted into the waist-shaped hole 1051. 051, and is detachably embedded in the plug-in slot 1014. The inner side wall of the waist-shaped hole 1051 is provided with a snap protrusion 1052 along the circumferential direction, and the lower end portion of the cavitation jet nozzle 103 is recessed with a snap groove 1035 along the circumferential direction. The snap protrusion 1052 is detachably embedded in the snap groove 1035. The cavitation jet nozzle is quickly locked on the water flosser body through the locking piece 105 to prevent it from loosening during use. At the same time, it can be quickly unlocked and disassembled by the pressing piece 104.

[0030] Specifically, it also includes an upper cover plate 106, which is arranged on the upper end of the locking piece 105, and the lower end wall of the upper cover plate 106 abuts against the upper end wall of the locking piece 105. The upper end of the upper cover plate 106 is provided with a through hole 1061, and the through hole 1061 is located above the plug-in slot 1014. The lower end of the cavitation jet nozzle 103 can be passed through the through hole. The upper cover plate plays a role of limiting and guiding the locking piece to avoid skewing during the sliding process of the locking piece.

[0031] Specifically, it also includes an elastic member 107, a through groove 1053 is recessed at the rear end of the locking member 105, a limiting column 1054 is protruded from the inner side wall of the through groove 1053, the elastic member 1071 is sleeved on the limiting column 1054, and a limiting plate 1015 is protruded from the rear end of the plug-in slot 1014. The rear end of the elastic member 107 abuts against the limiting plate 1015. The elastic member can be used to lock the cavitation jet nozzle and reset the locking member at the same time.

[0032] Specifically, the inner circumferential wall of the snap protrusion 1052 is provided with a plurality of serrated limiting protrusions 1055, and the bottom of the snap groove 1035 is provided with a plurality of serrated limiting grooves 1036 along the circumferential direction. The serrated limiting protrusions 1055 are detachably embedded in the serrated limiting grooves 1036 to play a limiting role, thereby preventing the cavitation jet nozzle from rotating.

[0033] Specifically, the electric water pump adopts a piston pump with a water pressure range of 15 to 125 psi, a pulse frequency of 1800 times / min±20%, and a noise level of ≤75dB.

[0034] Specifically, the surface roughness Ra of the inner cavity of the cavitation jet nozzle 103 ranges from 0.016 μm to 0.032 μm.

[0035] Specifically, the working principle and use process of the present invention are as follows: An electric water pump pumps water from the water tank into the jet channel of the cavitation jet nozzle. This channel accelerates and stabilizes the water flow, ensuring it reaches the resonant cavity at the appropriate speed and pressure. As the water continues through the resonant cavity, it generates self-excited pressure oscillations, which feed back into the cavity, forming feedback pressure oscillations. Here, cavitation nuclei form, the starting point for cavitation bubble formation in the fluid. As the water flows through the cavitation chamber, the local pressure drop causes the liquid to vaporize, forming cavitation bubbles. Finally, a large, intermittent vortex circulation and a high-intensity spray of cavitation bubbles are generated at the nozzle outlet. These cavitation bubbles collapse upon contact with surfaces (such as teeth or gums), achieving a cleaning effect. The collapse of the cavitation bubbles creates a strong, localized impact that helps remove food debris and plaque from between teeth while promoting blood circulation in the gums.

[0036] By setting a specific geometric shape and size, the internal structure of the cavitation jet nozzle of the present invention can match the frequency of pressure excitation with the natural frequency in the resonant cavity, and the feedback pressure oscillation can be amplified, thereby generating fluid resonance in the resonant cavity and generating a self-oscillating cavitation jet. At this time, the jet shear layer vortex will become a large-structured separated annular vortex. This large-structured intermittent vortex circulation can enhance the cavitation effect.

[0037] The present invention utilizes high-speed water flow to generate a large number of cavitation bubbles in the cavitation jet nozzle. These cavitation bubbles will generate a strong impact force when they come into contact with the surface of an object and burst, thereby more effectively removing stubborn stains on the tooth surface and in the teeth, which is conducive to deeply cleaning various blind spots of the teeth. Compared with traditional jet irrigators, the cavitation jet irrigator of the present invention has a better irrigating experience, gentler force, will not cause gum bleeding, can effectively remove tartar caused by smoking and drinking tea, has the effect of whitening teeth, and effectively improves the user experience.

[0038] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A cavitation jet dental flosser, characterized in that: It includes a water flosser body, a water tank, an electric water pump, a rechargeable battery and a cavitation jet nozzle. The side wall of the lower end of the water flosser body is provided with a receiving groove, the water tank is detachably embedded in the receiving groove, the electric water pump and the rechargeable battery are arranged in the water flosser body, and the cavitation jet nozzle is detachably arranged at the upper end of the water flosser body. The water inlet of the electric water pump is connected with the water tank, and the water outlet of the electric water pump is connected with the cavitation jet nozzle. The outer peripheral wall of the water flosser body is provided with a button and a charging interface. The rechargeable battery is electrically connected to the electric water pump, the button and the charging interface. The internal cavity of the cavitation jet nozzle is a jet channel, a resonance cavity, a cavitation chamber and a nozzle from bottom to top.

2. The cavitation jet dental flosser according to claim 1, characterized in that: The diameter of the jet channel is D S , the diameter of the resonant cavity is D, the length of the resonant cavity is L, the diameter of the cavitation chamber is d, and the length of the cavitation chamber is l , the expansion angle of the nozzle is α, the D S ,D,L,d, l And α follows the formula: Where, is the modulus coefficient in the resonant cavity; N -Number of oscillation modes in the resonant cavity, is the jet Mach number, dimensionless; is the jet velocity; is the propagation speed of sound waves in the fluid medium; is the critical Strouhal number, dimensionless, and can be 0.3 or 0.

6.

3. The cavitation jet dental flosser according to claim 1, characterized in that: The diameter of the jet channel ranges from 3.8 mm to 4.2 mm.

4. The cavitation jet dental flosser according to claim 1, characterized in that: The diameter of the resonant cavity ranges from 1.4 mm to 1.6 mm, and the length of the resonant cavity ranges from 10.5 mm to 11.5 mm.

5. The cavitation jet dental flosser according to claim 1, characterized in that: The diameter of the cavitation chamber ranges from 0.4 mm to 0.6 mm, and the length of the cavitation chamber ranges from 0.8 mm to 1.2 mm.

6. The cavitation jet dental flosser according to claim 1, characterized in that: The nozzle is arranged in a conical structure, the expansion angle of the nozzle is in the range of 36° to 40°, and the surface roughness Ra of the inner cavity of the cavitation jet nozzle is in the range of 0.016 μm to 0.032 μm.

7. The cavitation jet dental flosser according to claim 1, characterized in that: It also includes a pressing piece and a locking piece, the pressing piece is slidably arranged on the side wall of the upper end of the water flosser body, the upper end of the water flosser body is provided with a plug-in slot, the locking piece is slidably arranged at the upper end of the plug-in slot, the rear end of the pressing piece abuts against the locking piece, the upper end of the locking piece is recessed with a waist-shaped hole, the lower end of the cavitation jet nozzle is passed through the waist-shaped hole and is detachably embedded in the plug-in slot, the inner side wall of the waist-shaped hole is provided with a snap protrusion along the circumferential direction, the lower end of the cavitation jet nozzle is recessed with a snap groove along the circumferential direction, and the snap protrusion is detachably embedded in the snap groove.

8. The cavitation jet dental flosser according to claim 7, characterized in that: It also includes an upper cover plate, which is arranged on the upper end of the locking piece, and the lower end wall of the upper cover plate abuts against the upper end wall of the locking piece. The upper end of the upper cover plate is provided with a through hole, and the through hole is located above the plug-in slot. The lower end of the cavitation jet nozzle can be inserted into the through hole.

9. The cavitation jet dental flosser according to claim 7, characterized in that: It also includes an elastic part, the rear end of the locking part is recessed with a through groove, the inner side wall of the through groove is protruded with a limiting column, the elastic part is sleeved on the limiting column, the rear end of the plug-in slot is protruded with a limiting plate, and the rear end of the elastic part abuts against the limiting plate.

10. The cavitation jet dental flosser according to claim 7, characterized in that: The inner circumferential wall of the buckle protrusion is provided with a plurality of sawtooth-shaped limiting protrusions, and the bottom of the buckle groove is provided with a plurality of sawtooth-shaped limiting grooves along the circumferential direction. The sawtooth-shaped limiting protrusions are detachably embedded in the sawtooth-shaped limiting grooves.

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