CN106422005B - Ultrasonic atomization structure and ultrasonic atomization equipment adopting same - Google Patents
Ultrasonic atomization structure and ultrasonic atomization equipment adopting same Download PDFInfo
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- CN106422005B CN106422005B CN201610842366.2A CN201610842366A CN106422005B CN 106422005 B CN106422005 B CN 106422005B CN 201610842366 A CN201610842366 A CN 201610842366A CN 106422005 B CN106422005 B CN 106422005B
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- 238000000889 atomisation Methods 0.000 title claims abstract description 48
- 239000007788 liquid Substances 0.000 claims abstract description 336
- 239000003595 mist Substances 0.000 claims description 28
- 238000003825 pressing Methods 0.000 claims description 7
- 238000005213 imbibition Methods 0.000 claims description 6
- 239000006260 foam Substances 0.000 claims description 3
- 238000007641 inkjet printing Methods 0.000 claims description 2
- 238000010030 laminating Methods 0.000 claims 1
- 239000003570 air Substances 0.000 description 33
- 239000000919 ceramic Substances 0.000 description 20
- 239000010408 film Substances 0.000 description 7
- 239000002250 absorbent Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 5
- 230000002745 absorbent Effects 0.000 description 4
- 238000004891 communication Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000003814 drug Substances 0.000 description 3
- 229940079593 drug Drugs 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000005284 excitation Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 239000011148 porous material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000000443 aerosol Substances 0.000 description 1
- 239000012080 ambient air Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000003486 chemical etching Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000866 electrolytic etching Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000002663 nebulization Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 210000002345 respiratory system Anatomy 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M11/00—Sprayers or atomisers specially adapted for therapeutic purposes
- A61M11/005—Sprayers or atomisers specially adapted for therapeutic purposes using ultrasonics
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0638—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers spray being produced by discharging the liquid or other fluent material through a plate comprising a plurality of orifices
- B05B17/0646—Vibrating plates, i.e. plates being directly subjected to the vibrations, e.g. having a piezoelectric transducer attached thereto
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B17/00—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups
- B05B17/04—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods
- B05B17/06—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations
- B05B17/0607—Apparatus for spraying or atomising liquids or other fluent materials, not covered by the preceding groups operating with special methods using ultrasonic or other kinds of vibrations generated by electrical means, e.g. piezoelectric transducers
- B05B17/0653—Details
- B05B17/0676—Feeding means
- B05B17/0684—Wicks or the like
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Special Spraying Apparatus (AREA)
Abstract
The invention discloses an ultrasonic atomization structure and ultrasonic atomization equipment adopting the structure, which comprises a liquid receiving tank 12, a liquid absorbing medium 15 and an atomization unit, wherein the liquid absorbing medium 15 is arranged in the liquid receiving tank 12, the bottom surface of the liquid absorbing medium 15 is immersed in liquid in the liquid receiving tank 12, when in use, the liquid absorbing medium 15 absorbs and conveys the liquid in the liquid receiving tank 12 to one end of the liquid absorbing medium 15 far away from the bottom surface, and the atomization unit is attached to one end of the liquid absorbing medium 15 far away from the bottom surface; the end of the liquid absorbing medium 15 remote from the bottom surface is provided with a groove 1501. The ultrasonic atomization structure and the ultrasonic atomization equipment adopting the structure can atomize high-viscosity liquid into tiny liquid drops without causing overheat phenomenon of an atomization unit.
Description
Technical Field
The invention relates to the technical field of medical equipment, in particular to an ultrasonic atomization structure and ultrasonic atomization equipment adopting the same.
Background
Many occasions in daily life require liquid to be dispersed into tiny droplets or aerosols for use, such as disinfection, odor removal, air humidification, and the like. Atomizing or vaporizing the liquid tends to facilitate rapid and uniform diffusion of the liquid. Medical nebulizers typically comprise a heating unit or a gas compression pump, the former of which causes drug decomposition due to high temperatures; the latter is not only noisy, but also often contaminates the drug due to direct contact of the gas and liquid.
In order to meet the special requirements for delivering drugs via the respiratory tract, manufacturers have developed in recent years ultrasonic nebulization techniques, i.e. microporous nebulized sheets adhered to piezoelectric ceramic sheets by vibration. Briefly, based on this technique, a microporous atomizer plate in direct contact with a liquid is vibrated at ultrasonic frequencies together with a piezoelectric ceramic plate that is excited, and then the liquid is pumped to the surface of the atomizer plate and forms a thin film. The liquid film absorbs vibrational energy from the atomizing sheet and forms a standing wave with a direction of vibration perpendicular to the surface of the atomizing sheet. When the amplitude at a given frequency increases, the standing wave becomes unstable, eventually collapsing at a critical point. The minute liquid droplets are ejected vertically from the surface of the liquid film.
Most of the ultrasonic atomizing devices on the market at present are designed to directly arrange an ultrasonic atomizing unit in a liquid, and the design can only be used for atomizing water-based or low-viscosity liquid and cannot be used for atomizing high-viscosity liquid. Because the viscous liquid film can block micropores on the atomizing sheet, atomizing is blocked, and finally the temperature of the piezoelectric ceramic sheet is increased or even damaged. Therefore, there is a need to develop an ultrasonic atomizer capable of forming fine droplets of a high-viscosity liquid by ultrasonic atomization.
Disclosure of Invention
One object of the present invention is to: provided is an ultrasonic atomizing structure capable of effectively atomizing a high-viscosity liquid into minute droplets without damaging a piezoelectric ceramic sheet.
Yet another object of the present invention is: an ultrasonic atomizing apparatus is provided for externally spraying fine droplets atomized from a high-viscosity liquid.
To achieve the purpose, the invention adopts the following technical scheme:
in one aspect, an ultrasonic atomization structure is provided, which comprises a liquid receiving tank, a liquid absorbing medium and an atomization unit, wherein the liquid absorbing medium is arranged in the liquid receiving tank, the bottom surface of the liquid absorbing medium is immersed in liquid in the liquid receiving tank, the liquid absorbing medium absorbs the liquid in the liquid receiving tank and conveys the liquid to one end of the liquid absorbing medium far away from the bottom surface when in use, and the atomization unit is attached to one end of the liquid absorbing medium far away from the bottom surface; one end of the liquid absorbing medium, which is far away from the bottom surface, is provided with a groove.
As a preferable technical scheme, the atomization unit comprises a piezoelectric ceramic sheet and a microporous atomization sheet, wherein the microporous atomization sheet is arranged on one side of the piezoelectric ceramic sheet, which is close to the liquid absorption medium, and is attached to one end, which is far away from the bottom surface, of the liquid absorption medium;
the piezoelectric ceramic sheet is provided with a through hole, and an atomization through hole is formed in the middle of the microporous atomization sheet and corresponds to the through hole; the atomization through hole is communicated with the groove of the liquid absorbing medium.
Preferably, the thickness of the microporous atomization sheet is 20-400 microns, and the pore diameter of the atomization through hole is 1-300 microns.
Preferably, the area of the opening area of the microporous atomization sheet is smaller than the area of the through hole of the piezoelectric ceramic sheet.
Preferably, the atomizing unit comprises a plurality of groups of piezoelectric ceramic plates and microporous atomizing plates which are sequentially connected, and the piezoelectric ceramic plates and the microporous atomizing plates sequentially perform multistage atomization treatment on liquid.
As a preferable technical scheme, the microporous atomization sheet is in a flat plate shape;
or, the middle part of micropore atomizing piece is provided with the arc arch, the atomizing through-hole is seted up the protruding position of arc.
Preferably, the middle part of the microporous atomizing sheet is provided with an arc-shaped bulge protruding towards one side far away from the liquid absorbing medium.
As a preferred embodiment, the liquid absorbing medium is an inkjet printing foam.
As a preferable technical scheme, the liquid absorbing medium is divided into an upright part and a bending part which are connected with each other, the central line of the upright part is vertical to the horizontal plane, and the included angle between the central line of the bending part and the horizontal plane is more than 0 degree and less than 90 degrees.
As a preferable technical scheme, the device further comprises an ultrasonic oscillating circuit, and the atomizing unit is connected with the ultrasonic oscillating circuit through a wire.
Preferably, the output frequency of the ultrasonic oscillating circuit is between 50kHz and 5MHz, and the amplitude is between 50V and 500V.
As a preferable technical proposal, the utility model also comprises a bracket and a pressing plate,
the liquid absorbing medium is inserted into the mounting through hole, the inner wall of the bracket is attached to the side wall of the liquid absorbing medium, the outer wall of the bracket is fixedly connected with the liquid receiving groove, and a conduction gap is arranged between the bottom surface of the bracket and the bottom surface of the inner wall of the liquid receiving groove;
the clamp plate sets up the atomizing unit is kept away from one side of imbibition medium, the through-hole of stepping down has been seted up at the middle part of clamp plate, the clamp plate with the support can dismantle the connection, the clamp plate with the support presss from both sides tightly the atomizing unit.
On the other hand, an ultrasonic atomization device is provided, which comprises the ultrasonic atomization structure and a mist guide pipe; the mist guide pipe is horn-shaped with two open ends, the large open end of the mist guide pipe is connected with the side wall of the liquid receiving tank, and a backflow gap is formed in the inner side of the large open end of the mist guide pipe.
As a preferable technical scheme, the included angle between the center line of the small opening end of the mist guide pipe and the horizontal plane is more than 0 degree and less than 90 degrees.
As a preferable technical proposal, the utility model also comprises a liquid storage tank, a liquid storage canal and a top plug,
the liquid storage tank is arranged above the liquid storage channel, and the outer side wall of the lower part of the liquid storage tank is attached to and connected with the inner side wall of the upper part of the liquid storage channel in a sliding manner; the upper part of the liquid storage tank is provided with a liquid inlet, and the liquid inlet is provided with an upper cover which is detachably connected; the bottom of the liquid storage tank is provided with a through hole, a gap is reserved between the bottom of the liquid storage tank and the bottom surface of the liquid storage channel, a liquid storage tank outlet is formed, and the liquid storage tank is communicated with the liquid storage channel through the liquid storage tank outlet;
the side surface of the upper part of the liquid storage channel is provided with an air pressure balance port, and the lower part of the liquid storage channel is connected with the bottom of the liquid receiving groove through a guide channel; a top plug limiting block and a liquid storage tank limiting block are arranged at the bottom of the liquid storage channel, an air inlet notch is reserved between the liquid storage tank limiting block and the bottom of the liquid storage channel, and the highest position of the air inlet notch is not lower than the highest position of an outlet of the liquid storage channel;
the upper part of the top plug is arranged in the liquid storage tank, and a discharge hole communicated with the liquid storage channel is formed at the bottom of the liquid storage tank and below the top plug; the lower part of top stopper is outside the reservoir, and the middle part of top stopper passes the through-hole of reservoir bottom and connects the upper portion of top stopper and the lower part of top stopper, is equipped with between the outer wall of the lower part of top stopper and the bottom of reservoir and is used for closing the spring of discharge port, during the use top stopper extrusion top stopper, the spring is compressed, the discharge port is opened.
Specifically, external air enters the liquid storage tank through the air pressure balancing port, the air inlet notch, the liquid storage tank outlet and the discharge hole, so that the internal air pressure of the liquid storage tank is balanced with the internal air pressure of the liquid storage channel. When the liquid storage tank outlet or the air inlet notch is immersed by liquid, external air cannot enter the liquid storage tank, the liquid in the liquid storage tank cannot flow into the liquid storage channel, and the liquid level in the liquid storage channel reaches the highest liquid level. Therefore, the liquid level control of the whole ultrasonic atomization device can be realized by changing the height design of the outlet of the liquid storage tank or the air inlet notch so as to further change the height of the highest liquid level of the liquid storage channel.
The invention provides an ultrasonic atomization structure and ultrasonic atomization equipment adopting the same, which have the beneficial effects that:
1) The high-viscosity liquid can be ultrasonically atomized into tiny liquid drops, and meanwhile, the problem of excessive heating of an atomization unit is avoided;
2) By changing the shape of the liquid-absorbing medium, the ejection direction of the minute liquid droplets coming out of the atomizing unit can be changed;
3) By changing the shapes of the liquid absorbing medium and the mist guide pipe, the jetting direction of the tiny liquid drops coming out of the ultrasonic atomizing device can be changed.
Drawings
The invention is described in further detail below with reference to the drawings and examples.
FIG. 1 is a cross-sectional view of an ultrasonic atomizing apparatus according to an embodiment;
FIG. 2 is a schematic illustration of an assembly of an atomizing unit with a wicking medium;
FIG. 3 is an enlarged schematic view of a portion of an atomizing unit and a wicking medium;
fig. 4 is a schematic view of a folded portion of a wicking medium;
FIG. 5 is a schematic view of a microporous atomizer plate with a protrusion disposed in the middle;
fig. 6 is an external view schematically showing an ultrasonic atomizing apparatus.
In fig. 1 to 6:
1. an upper cover;
2. a liquid storage tank; 201. the bottom of the liquid storage tank;
3. a top plug;
4. a discharge hole;
5. a top plug limiting block;
6. a liquid storage channel;
7. an air pressure balancing port;
8. a liquid storage tank limiting block;
9. a spring;
10. an outlet of the reservoir;
11. a guide channel;
12. a liquid receiving tank;
13. a small open end;
14. a bracket;
15. a liquid absorbing medium; 1501. a groove; 1502. an upstanding portion; 1503. a bending portion;
16. a piezoelectric ceramic sheet;
17. a wire; 1701. a first wire; 1702. a second wire;
18. a pressing plate;
19. microporous atomizing sheet; 1901. an atomization through hole;
20. a mist guide pipe;
21. a backflow gap;
22. a switch;
23. screw fixing holes; 24. a screw through hole; 25. a screw;
26. a charging interface;
27. an indicator light;
28. and an air inlet notch.
Detailed Description
The technical scheme of the invention is further described below by the specific embodiments with reference to the accompanying drawings.
The specific structure is as follows:
as shown in fig. 1, in the present embodiment, an ultrasonic atomizing apparatus includes a liquid storage tank 2 and a liquid storage channel 6 arranged up and down, and an outer side wall of a lower portion of the liquid storage tank 2 is attached to an inner side wall of an upper portion of the liquid storage channel 6, but relative rotation or sliding can occur therebetween. The top of the liquid storage tank 2 is provided with an opening, liquid to be atomized can be added from the opening, the opening is in threaded connection with the upper cover 1, and the liquid storage tank can be designed into quick connection modes such as buckling and buckling. The bottom of the liquid storage tank 2 is provided with a discharge hole 4 below the upper part of the top plug 3, the liquid storage tank 2 is communicated with a liquid storage channel 6 through the discharge hole 4, the side surface of the upper part of the liquid storage channel 6 is provided with an air pressure balance port 7, the liquid storage tank 2 and the liquid level condition in the liquid storage channel 6 can be observed, and the liquid storage channel 6 can be communicated with the external air pressure. The bottom 201 of the liquid storage tank is provided with a gap with the bottom surface of the inner wall of the liquid storage channel 6 to form a liquid storage tank outlet 10, and the discharge hole 4 is communicated with the liquid storage channel 6 through the liquid storage tank outlet 10. A liquid storage tank limiting block 8 and a top plug limiting block 5 are arranged at the bottom of the liquid storage channel 6; an air inlet gap 28 is reserved at the bottoms of the liquid storage tank limiting block 8 and the liquid storage channel 6, and external air enters the liquid storage tank 2 through the air pressure balancing port 7, the air inlet gap 28, the liquid storage tank outlet 10 and the discharge hole 4, so that the internal air pressure of the liquid storage tank 2 is balanced with the internal air pressure of the liquid storage channel 6. When the liquid storage tank outlet 10 or the air inlet notch 28 is immersed by the liquid, the external air cannot enter the liquid storage tank 2, the liquid in the liquid storage tank 2 cannot flow into the liquid storage channel 6, and the liquid level in the liquid storage channel 6 reaches the highest liquid level. So the liquid level control of the whole ultrasonic atomization device can be realized by changing the height design of the liquid storage tank outlet 10 or the air inlet notch 28, and further changing the height of the highest liquid level of the liquid storage channel 6. In the present embodiment, the highest position of the air inlet notch 28 is higher than the highest position of the reservoir outlet 10, so that the liquid in the reservoir 2 stops flowing into the reservoir 6 as long as the liquid level in the reservoir 6 is higher than the highest position of the reservoir outlet 10. Of course, the height of the highest position of the air inlet notch 28 can be flush with the height of the highest position of the liquid storage tank outlet 10 or lower than the height of the highest position of the liquid storage tank outlet 10. The liquid storage tank limiting block 8 can limit the movement position of the liquid storage tank 2 in the vertical direction, and when the liquid storage tank 2 and the liquid storage channel 6 slide relatively, the liquid storage tank 2 moves downwards to be in contact with the liquid storage tank limiting block 8, so that the liquid storage tank can not move downwards any more. The upper part of the top plug 3 is arranged in the liquid storage tank 2, the lower part of the top plug 3 is attached to the upper surface of the top plug limiting block 5 in the liquid storage channel 6, and the middle part of the top plug 3 penetrates through the through hole of the bottom 201 of the liquid storage tank to connect the upper part and the lower part of the top plug 3. A spring 9 is arranged between the lower part of the top plug 3 and the bottom 201 of the liquid storage tank, and in the state that the liquid storage tank 2 is not installed in the liquid storage channel 6, the tension of the spring 9 drives the upper part of the top plug 3 to be attached to the bottom surface of the liquid storage tank 2, so that the discharge hole 4 is closed. In the state of using the liquid storage tank 2 inserted into the liquid storage channel 6, the lower part of the top plug 3 is propped by the top plug limiting block 5 and cannot move downwards, the spring 9 is compressed, the upper part of the top plug 3 is separated from the bottom surface of the liquid storage tank 2, and accordingly the discharge hole 4 is opened, and the communication between the liquid storage tank 2 and the liquid storage channel 6 is realized.
The lower part of the liquid storage channel 6 is provided with a guide channel 11 communicated with a liquid receiving groove 12, so that the liquid level in the liquid storage channel 6 is the same as the liquid level in the liquid receiving groove 12. The upper part of the liquid receiving tank 12 is connected with a horn-shaped mist guide pipe 20, two ends of the mist guide pipe 20 are opened, the large opening end is communicated with the liquid receiving tank 12, and atomized tiny liquid drops are sprayed outwards from the small opening end 13. The liquid receiving tank 12 is internally provided with a bracket 14, a liquid absorbing medium 15 is arranged in the middle of the bracket 14, the lower surface of the liquid absorbing medium 15 is attached to the bottom surface of the inner wall of the liquid receiving tank 12, a gap is reserved between the bottom of the bracket 14 and the bottom of the liquid receiving tank 12, and liquid in the liquid receiving tank 12 can flow into the liquid absorbing medium 15. The upper surface of the liquid-absorbing medium 15 is attached to the lower surface of the atomizing unit.
As shown in fig. 2 and 3, the atomizing unit includes a microporous atomizing sheet 19 and a piezoelectric ceramic sheet 16 disposed on the microporous atomizing sheet 19. A through hole is formed in the middle of the piezoelectric ceramic sheet 16, and a small atomizing through hole 1901 is provided in the microporous atomizing sheet 19 below the through hole of the piezoelectric ceramic sheet 16. The microporous atomizer plate 19 may be made of metal, ceramic or even plastic, and the choice of material depends on whether it has sufficient strength under high frequency vibration, and in this embodiment, the microporous atomizer plate 19 is made of metal. The atomizing via 1901 may be fabricated by a variety of methods, preferably laser or chemical or electrolytic etching. The number of the atomizing holes 1901 may range from one to several thousands, the thickness of the microporous atomizing sheet 19 is 20 micrometers to 400 micrometers, the pore diameter of the atomizing holes 1901 is 1 micrometer to 300 micrometers, in the present embodiment, the thickness of the microporous atomizing sheet 19 is 100 micrometers, the number of the atomizing holes 1901 is 20, and the pore diameter of the atomizing holes 1901 is 10 micrometers. Grooves 1501 are provided in the liquid absorbent medium 15 below the atomizing through holes 1901 of the microporous atomizing sheet 19. The grooves 1501 can store liquid transferred from the lower portion of the liquid-absorbing medium 15 to provide an appropriate amount of liquid supply to the atomizing unit. The atomizing unit is connected to an external ultrasonic oscillating circuit through a first wire 1701 and a second wire 1702. The pressure plate 18 is arranged above the atomizing unit, and the pressure plate 18 is connected with the bracket 14 through a screw 25, so that the piezoelectric ceramic sheet 16, the micropore atomizing sheet 19 and the liquid absorbing medium 15 are in close contact. The pressing plate 18 is provided with a screw through hole 24, the bracket 14 is provided with a screw fixing hole 23, and the screw 25 penetrates through the screw through hole 24 and is screwed with the screw fixing hole 23, so that the pressing plate 18 and the bracket 14 are fixed.
As shown in fig. 1, a backflow gap 21 is left between the pressing plate 18 and the inner wall of the mist guide pipe 20, and larger droplets sprayed onto the mist guide pipe 20 from the atomizing unit are condensed and liquefied on the mist guide pipe 20 and flow onto the backflow gap 21 along the pipe wall of the mist guide pipe 20, and flow back into the liquid receiving tank 12 through the backflow gap 21.
Description of the workflow:
when the liquid storage groove 2 is not filled in the liquid storage channel 6, the upper part of the top plug 3 is attached to the inner wall of the bottom of the liquid storage groove 2 under the action of the elastic force of the spring 9, so that the discharge hole 4 is plugged, and the communication relation between the liquid storage groove 2 and the liquid storage channel 6 is broken. At this time, the upper lid 1 is opened, and the liquid is added to the liquid reservoir 2. After the addition, the upper cover 1 is screwed.
The liquid storage tank 2 is arranged in the liquid storage channel 6, the spring 9 is compressed to enable the discharge hole 4 to be exposed, liquid in the liquid storage tank 2 flows into the liquid storage channel 6 along the discharge hole 4, meanwhile, outside air enters the liquid storage channel 6 through the air pressure balance port 7, then enters the liquid storage tank 2 through the air inlet notch 28, the liquid storage tank outlet 10 and the discharge hole 4, air pressure balance between the inside of the liquid storage tank 2 and the liquid storage channel 6 is achieved, and the liquid in the liquid storage tank 2 can continuously flow into the liquid storage channel 6. When the liquid level in the reservoir 6 rises above the reservoir outlet 10, ambient air cannot enter the reservoir 2 through the reservoir outlet 10, and the liquid in the reservoir 2 stops flowing into the reservoir 6. At this time, the liquid level of the whole ultrasonic atomization device is kept motionless, when an external ultrasonic oscillation circuit starts to work, the liquid level in the liquid receiving tank 12 is reduced, the liquid level in the liquid storage channel 6 is also reduced due to the communication effect of the guide channel 11, when the liquid level in the liquid storage channel 6 is reduced to the highest position of the liquid storage channel outlet 10 to expose the liquid level, air can enter the liquid storage tank 2 in the mode described above, air pressure balance is further realized, and the liquid in the liquid storage tank 2 can flow into the liquid storage channel 6 until the liquid level in the liquid storage channel 6 is higher than the liquid storage channel outlet 10 again. So reciprocating, just realized reservoir 2 according to the user with the function of liquid demand automatic supply liquid to stock solution canal 6, simple structure moreover, whole automatic supply does not need the external power or other effort of giving.
Due to the communication of the canal 11, the liquid level of the liquid storage canal 6 and the liquid receiving groove 12 will be the same. The liquid-absorbent medium 15 is a material that can absorb and store liquid, such as an ink-jet printed foam or a porous fibrous material. The bottom of the liquid-absorbing medium 15 absorbs the liquid in the liquid-receiving tank 12 and transfers the absorbed liquid to the upper portion of the liquid-absorbing medium 15. The atomizing unit acquires liquid through the grooves 1501 of the liquid absorbing medium 15, atomizes the liquid into fine droplets by the ultrasonic oscillation circuit, and sprays the droplets into the mist guide pipe 20. Some of the tiny droplets from the atomizing unit are sprayed outwards through the small opening end 13 of the mist guide tube 20, and the other portion of the tiny droplets are sprayed on the inner wall of the mist guide tube 20, are liquefied and accumulated and then slide down along the inner wall of the mist guide tube 20, flow back into the liquid receiving tank 12 through the backflow gap 21 between the pressing plate 18 and the mist guide tube 20, and are absorbed again by the liquid absorbing medium 15.
The microporous atomizer plate 19 in this embodiment is in contact with the liquid-absorbing medium 15, rather than in direct contact with the liquid being atomized. When the lower surface of the microporous atomizing sheet 19 is in contact with the adsorption medium in a saturated state, the surface of the microporous atomizing sheet 19 in contact with the liquid absorbing medium 15 is wetted with the liquid, and then the liquid passes through the micropores of the microporous atomizing sheet 19 due to capillary effect, permeates from the lower surface to the upper surface, and forms a liquid film on the upper surface. After excitation by an external ultrasonic oscillating circuit, the microporous atomizing sheet 19 vibrates at a specific frequency and transmits vibration energy to the liquid film, thereby forming a standing wave. When the amplitude of the standing wave reaches a critical value, droplets are ejected from the liquid film in a direction perpendicular to the upper surface of the microporous atomizer plate 19. After atomization occurs, liquid is continuously transported from the bottom to the top of the wicking medium 15 and eventually permeates to the upper surface of the microporous atomizer plate 19. As the liquid is consumed, the liquid level in the liquid receiver 12 and the liquid storage channel 6 simultaneously drops. The liquid-absorbing medium 15 may also act as an efficient cooling system for dissipating the heat generated by the atomizing unit.
In this embodiment, grooves 1501 are provided in the wicking medium 15 below the microporous region of microporous atomizing sheet 19 so that the atomizer can be adapted for high viscosity liquids. When atomizing a high-viscosity liquid using a conventional ultrasonic atomizer, the micropores on the microporous atomizing sheet 19 are often clogged with a thick liquid film because the replenishment rate of the liquid is greater than the atomization rate thereof. On the other hand, this phenomenon also causes the atomizing unit to overheat. In this embodiment, grooves 1501 on the wicking medium 15 may be used to control the rate of liquid delivery to the upper surface of microporous atomizer sheet 19 while also maintaining the back pressure on the lower surface of microporous atomizer sheet 19. The micro-holes on the micro-hole atomizing sheet 19 can be regarded as capillaries, which transport the liquid from the lower surface to the upper surface of the micro-hole atomizing sheet 19. Because grooves 1501 are located below the open areas of the atomizing sheet, these capillaries cannot draw liquid directly from the liquid-absorbing medium 15. The replenishment rate and the atomization rate of the liquid are thus balanced and overheating of the atomization unit is suppressed. At the same time, the grooves 1501 can also maintain the back pressure on the lower surface of the microporous atomizing sheet 19, ensuring that the ejection of droplets is performed on the upper surface of the microporous atomizing sheet 19. These properties make such atomizers suitable for use with high viscosity liquids. The shape, size of the bottom surface of the grooves 1501 and the depth of the grooves 1501 may be varied for different applications and liquids to tailor the structure and atomizing device for various high viscosity liquids.
In this embodiment, the atomizing unit is composed of a group of piezoelectric ceramic plates 16 and microporous atomizing plates 19, or may be composed of a plurality of groups of piezoelectric ceramic plates 16 and microporous atomizing plates 19 in cascade connection. The frequency, amplitude and vibration mode of vibration of the atomization unit can be adjusted by changing the number of groups, so that the atomization structure and the atomization device can respond to the excitation effect of an external ultrasonic oscillating circuit with the vibration frequency ranging from 50kHz to 2MHz, and the specific cascading number of groups and the vibration frequency depend on the viscosity of liquid and the expected size of liquid drops.
The liquid absorbent medium 15 in this embodiment may be a right cylinder as shown in fig. 1 and 2, a rectangular parallelepiped or a hexagonal prism, or may have a straight portion 1502 and a bent portion 1503 as shown in fig. 4. Because the spray direction of the atomized droplets is perpendicular to the upper surface of the microporous atomizing sheet 19, and the lower surface of the microporous atomizing sheet 19 is in contact with the upper surface of the liquid absorbent medium 15, the spray direction after atomization can be changed by changing the bending angle of the bending portion 1503 of the liquid absorbent medium 15.
The mist guide pipe 20 in fig. 1 is a shrink pipe, not a conventional straight round pipe. Due to the small-up-large-down convergent tube design, the mist guide tube 20 can guide atomized droplets to a desired direction and recover large-sized droplets. Those droplets of large size will flow down the inner wall of the mist guide pipe 20 after contacting the inner wall and then flow back to the liquid receiving tank 12 via the back flow gap 21. The mist guide pipe 20 of this embodiment may be upright, or may include a vertical portion and a curved portion, and by changing the angle of the curved portion, the direction of the outlet of the small opening end 13 may be arbitrarily changed from vertical to horizontal, thereby changing the direction of the liquid spray of the entire atomizing apparatus.
It will be appreciated that the shape of grooves 1501 in wicking medium 15 is not limited to a cylindrical shape, and may be any other form of recessed area. And the number of grooves 1501 may be two, three or even more. The dimensions of the grooves 1501 may vary depending on the viscosity of the liquid and the performance of the atomizer.
The shape of the microporous atomizing sheet 19 may be a microporous atomizing sheet 19 having arc-shaped projections in fig. 5, in addition to a straight flat sheet as shown in fig. 1.
The operation of the ultrasonic atomizing apparatus provided according to the embodiment of the present invention will be briefly described below.
Fig. 6 is an external view schematically showing an ultrasonic atomizing apparatus. The reservoir 2 has been filled with a high viscosity liquid by opening the upper lid 1 prior to actuation of the atomizer. The viscosity of the liquid used in this example was about 200 centipoise. First, the liquid will flow into the reservoir 6 and then through the conduit 11 to the liquid receiver 12. The liquid absorbing medium 15 starts to absorb the liquid in the liquid receiving tank 12 and is conveyed to the microporous atomizing sheet 19, and finally an equilibrium state is reached, at which the liquid levels of the liquid receiving tank 12 and the liquid storage channel 6 are equal. When the push-button switch 22 is turned on, the energized ultrasonic oscillating circuit outputs an ultrasonic excitation signal to the atomizing unit through the lead 17. The annular piezoelectric ceramic plate 16 and the microporous atomizing plate 19 vibrate accordingly at this ultrasonic frequency, and droplets of the high-viscosity liquid are ejected. The oscillation frequency of this embodiment is 120kHz, and the outer diameter and the inner diameter of the annular piezoelectric ceramic plate 16 are 16mm and 8mm, respectively. The indicator light 27 may be an LED indicator light, which may be used to indicate the operating status and battery level of the atomizer, and the charging interface 26 may be a mini-USB33 interface, which may be used for charging.
The terms "first" and "second" are used herein for descriptive purposes only and are not intended to have a particular meaning.
It should be noted that the above embodiments are merely preferred embodiments of the present invention and the applied technical principles, and any changes or substitutions easily conceivable to those skilled in the art within the scope of the present invention are included in the scope of the present invention.
Claims (9)
1. The ultrasonic atomization structure is characterized by comprising a liquid receiving tank (12), a liquid absorbing medium (15) and an atomization unit, wherein the liquid absorbing medium (15) is arranged in the liquid receiving tank (12), the bottom surface of the liquid absorbing medium (15) is immersed in liquid in the liquid receiving tank (12), the liquid absorbing medium (15) absorbs and conveys the liquid in the liquid receiving tank (12) to one end, far away from the bottom surface, of the liquid absorbing medium (15) when in use, and the atomization unit is attached to one end, far away from the bottom surface, of the liquid absorbing medium (15); a groove (1501) is formed at one end, far away from the bottom surface, of the liquid absorbing medium (15); the groove (1501) can store the liquid that comes from imbibition medium (15) lower part transfer, atomizing unit includes piezoceramics piece (16) and micropore atomizing piece (19), micropore atomizing piece (19) set up piezoceramics piece (16) are close to one side of imbibition medium (15), micropore atomizing piece (19) with the one end laminating of bottom surface is kept away from to imbibition medium (15), be equipped with the through-hole on piezoceramics piece (16), the middle part of micropore atomizing piece (19) and correspond the position of through-hole has seted up atomizing through-hole (1901), on micropore atomizing piece (19) atomizing through-hole (1901) can be with liquid in imbibition medium (15) follow the lower surface of micropore atomizing piece (19) carries to the upper surface of micropore atomizing piece (19), atomizing through-hole (1901) with recess (1501) of imbibition medium (15) are kept away from bottom surface (1501) of micropore atomizing piece (19) is located atomizing through-hole (1901) can be carried out by the atomizing area under the control of micropore atomizing piece (19) can the surperficial of mist of carrying in order to prevent the liquid from directly carrying out the through-hole (1501) can be carried out.
2. An ultrasonic atomizing structure according to claim 1, characterized in that said microporous atomizing sheet (19) is flat plate-like;
or, arc-shaped protrusions are arranged in the middle of the microporous atomizing sheet (19), and the atomizing through holes (1901) are formed in the arc-shaped protrusions.
3. Ultrasonic atomizing structure according to claim 1, characterized in that said liquid absorbing medium (15) is an inkjet printing foam.
4. The ultrasonic atomizing structure according to claim 1, characterized in that the liquid absorbing medium (15) is divided into an upright portion (1502) and a folded portion (1503) which are connected to each other, a center line of the upright portion (1502) is perpendicular to a horizontal plane, and an angle between the center line of the folded portion (1503) and the horizontal plane is 0 degrees or more and 90 degrees or less.
5. The ultrasonic atomizing structure according to claim 1, further comprising an ultrasonic oscillating circuit, wherein the atomizing unit is connected to the ultrasonic oscillating circuit via a wire (17).
6. The ultrasonic atomizing structure according to claim 1, further comprising a bracket (14) and a pressing plate (18),
the liquid absorbing medium collecting device is characterized in that a mounting through hole is formed in the middle of the support (14), the liquid absorbing medium (15) is inserted into the mounting through hole, the inner wall of the support (14) is attached to the side wall of the liquid absorbing medium (15), the outer wall of the support (14) is fixedly connected with the liquid receiving groove (12), and a conducting gap is formed between the bottom surface of the support (14) and the bottom surface of the inner wall of the liquid receiving groove (12);
the pressure plate (18) is arranged on one side, far away from the liquid absorbing medium (15), of the atomizing unit, a yielding through hole is formed in the middle of the pressure plate (18), the pressure plate (18) is detachably connected with the support (14), and the pressure plate (18) is tightly clamped with the support (14) to the atomizing unit.
7. An ultrasonic atomizing device, characterized in that: comprising the ultrasonic atomizing structure according to any one of claims 1 to 6, further comprising a mist guide pipe (20); the mist guide pipe (20) is horn-shaped with two open ends, the large open end of the mist guide pipe (20) is connected with the side wall of the liquid receiving tank (12), and a backflow gap (21) is formed in the inner side of the large open end of the mist guide pipe (20).
8. The ultrasonic atomizing apparatus according to claim 7, characterized in that an angle between a center line of the small opening end (13) of the mist guide pipe (20) and a horizontal plane is 0 degrees or more and 90 degrees or less.
9. The ultrasonic atomizing apparatus according to claim 7, further comprising a liquid reservoir (2), a liquid reservoir channel (6), and a top plug (3),
the liquid storage tank (2) is arranged above the liquid storage channel (6), and the outer side wall of the lower part of the liquid storage tank (2) is adhered to and slidingly connected with the inner side wall of the upper part of the liquid storage channel (6); the upper part of the liquid storage tank (2) is provided with a liquid inlet, and the liquid inlet is provided with an upper cover (1) which is detachably connected; the bottom of the liquid storage tank (2) is provided with a through hole;
the side surface of the upper part of the liquid storage channel (6) is provided with an air pressure balance port (7), and the lower part of the liquid storage channel (6) is connected with the bottom of the liquid receiving groove (12) through a guide channel (11); a top plug limiting block (5) and a liquid storage groove limiting block (8) are arranged at the bottom of the liquid storage channel (6), and an air inlet gap (27) is reserved between the liquid storage groove limiting block (8) and the bottom of the liquid storage channel (6);
the upper part of the top plug (3) is arranged in the liquid storage tank (2), and a discharge hole (4) communicated with the liquid storage channel (6) is arranged at the bottom (201) of the liquid storage tank and below the top plug (3); the lower part of top stopper (3) is outside reservoir (2), and the through-hole that the middle part of top stopper (3) passed reservoir bottom (201) connects the upper portion of top stopper (3) and the lower part of top stopper (3), is equipped with between the outer wall of the lower part of top stopper (3) and the bottom of reservoir (2) to be used for closing spring (9) of discharge port (4), during the use top stopper (5) crowded press top stopper (3), spring (9) compress, discharge port (4) are opened.
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| US12121056B2 (en) | 2020-04-06 | 2024-10-22 | Shaheen Innovations Holding Limited | Hookah device |
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| KR102704091B1 (en) | 2019-12-15 | 2024-09-09 | 샤힌 이노베이션즈 홀딩 리미티드 | Mist inhaler devices |
| US20240148053A9 (en) | 2019-12-15 | 2024-05-09 | Shaheen Innovations Holding Limited | Hookah device |
| US11730191B2 (en) | 2019-12-15 | 2023-08-22 | Shaheen Innovations Holding Limited | Hookah device |
| US11589610B2 (en) | 2019-12-15 | 2023-02-28 | Shaheen Innovations Holding Limited | Nicotine delivery device having a mist generator device and a driver device |
| EP3855949A4 (en) | 2019-12-15 | 2021-08-04 | Shaheen Innovations Holding Limited | Ultrasonic mist inhaler |
| US11730193B2 (en) | 2019-12-15 | 2023-08-22 | Shaheen Innovations Holding Limited | Hookah device |
| EP3856304B1 (en) | 2019-12-15 | 2023-11-08 | Shaheen Innovations Holding Limited | Ultrasonic mist inhaler |
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| CN112843397B (en) * | 2020-12-30 | 2022-07-08 | 佳木斯大学 | Ultrasonic atomization ozone therapeutic instrument for obstetrics and gynecology department |
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| US12121056B2 (en) | 2020-04-06 | 2024-10-22 | Shaheen Innovations Holding Limited | Hookah device |
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