CN109621180B - Micro-droplet spraying device - Google Patents
Micro-droplet spraying device Download PDFInfo
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- CN109621180B CN109621180B CN201910090303.XA CN201910090303A CN109621180B CN 109621180 B CN109621180 B CN 109621180B CN 201910090303 A CN201910090303 A CN 201910090303A CN 109621180 B CN109621180 B CN 109621180B
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- slit
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- 238000005507 spraying Methods 0.000 title claims description 17
- 239000007788 liquid Substances 0.000 claims abstract description 299
- 238000001125 extrusion Methods 0.000 claims abstract description 44
- 239000007779 soft material Substances 0.000 claims abstract description 5
- 238000003825 pressing Methods 0.000 claims description 39
- 230000007704 transition Effects 0.000 claims description 22
- 238000003860 storage Methods 0.000 claims description 13
- 230000001154 acute effect Effects 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000012459 cleaning agent Substances 0.000 claims 1
- 230000009286 beneficial effect Effects 0.000 description 9
- 239000006196 drop Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 8
- 238000012387 aerosolization Methods 0.000 description 7
- 238000009472 formulation Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 7
- 239000000203 mixture Substances 0.000 description 7
- 230000008901 benefit Effects 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 230000000857 drug effect Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 3
- 239000012629 purifying agent Substances 0.000 description 3
- 238000004887 air purification Methods 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 206010062575 Muscle contracture Diseases 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 208000006111 contracture Diseases 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 229940079593 drug Drugs 0.000 description 1
- 239000003889 eye drop Substances 0.000 description 1
- 229940012356 eye drops Drugs 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000011550 stock solution Substances 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- A61M35/00—Devices for applying media, e.g. remedies, on the human body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F9/00—Methods or devices for treatment of the eyes; Devices for putting-in contact lenses; Devices to correct squinting; Apparatus to guide the blind; Protective devices for the eyes, carried on the body or in the hand
- A61F9/0008—Introducing ophthalmic products into the ocular cavity or retaining products therein
-
- 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
- A61M31/00—Devices for introducing or retaining media, e.g. remedies, in cavities of the body
Abstract
The invention relates to the technical field of micro-droplet ejection, in particular to a micro-droplet ejection device. The liquid container comprises a shell, a connecting part for connecting a liquid outlet part of the liquid container and a communicating pipe arranged on the connecting part and used for being inserted into the liquid container; one end of the connecting part, which is used for connecting the liquid outlet part of the liquid container, is provided with a slit, and a liquid flowing cavity communicated with the slit and used for flowing micro liquid drops is arranged in the connecting part; one end of the liquid outlet pipe, which is far away from the slit, is communicated with a liquid outlet cavity, the liquid outlet pipe extends to the bottom of the liquid outlet cavity, the liquid outlet cavity is communicated with a liquid outlet hole, and a piezoelectric actuator for driving the outer wall to vibrate is arranged on one outer wall forming the liquid outlet cavity; one end of the communicating pipe far away from the slit is communicated with a closed extrusion cavity, and the wall forming the extrusion cavity is made of soft materials; one end of the liquid outlet cavity, which is far away from the liquid outlet hole, is communicated with an air pressure balance hole, and the air pressure balance hole is communicated with the outside air.
Description
Technical Field
The invention relates to the technical field of micro-droplet ejection, in particular to a micro-droplet ejection device.
Background
The jet area of micro-droplet jet generated by utilizing the piezoelectric printing technology principle is concentrated, the jet quantity is accurate, the raw material is saved, and the jet force to the object to be jetted is controlled.
Because of the benefits of microdroplet ejection, it is presently more desirable to employ microdroplet ejection for drugs that require instillation in the corresponding parts of the body. The sprayed medicine can reach the affected part more effectively.
Especially in the field of eye administration, in the process of using traditional dropper mode to administer, blink or muscle contracture at key moment easily causes micro-droplet to drip on the eyes and face, nose or other positions of face, old person still easily can't drip the eye drops into eyes accurately because of the coordination problem of hand. The advantages of accuracy, rapidness and the like of the micro-droplet injection technology are utilized, and various defects of the traditional administration mode are well overcome.
Chinese patent No. 103118642B discloses a droplet generation device comprising a fluid delivery system capable of delivering a predetermined volume of fluid in the form of droplets having a high percentage of adhesion that is sufficient and repeatable upon application. The device comprises a housing; a reservoir; a reservoir disposed within the housing for receiving a volume of fluid; an ejector mechanism configured to eject a stream of droplets having an average ejected droplet diameter greater than 15 μm, the stream of droplets entraining less airflow during use such that the stream of droplets is capable of adhering to the eye of a subject. However, in the above scheme, the liquid in the liquid reservoir is connected with the outside air through the opening, so that the drug effect of the liquid is easily affected and even the liquid is deteriorated after long-time storage.
Chinese patent No. 101693132B discloses an aerosolization delivery system and method, an aerosolization apparatus comprising: a housing sized and shaped to be held in a user's hand; a disposable aerosolizing element connected to the housing and capable of ejecting an aerosolized formulation, the aerosolizing element comprising: a body defining a chamber; a formulation release aperture defined within the body and communicating with the chamber; and a movable portion positioned opposite the formulation-releasing orifice; an actuator disposed within the housing and positioned to impart vibratory oscillation to the movable portion of the disposable aerosolization element to aerosolize a formulation from the chamber of the aerosolization element, the actuator comprising a piezoelectric element and a motion transfer member operable to transfer vibrations of the piezoelectric element to the movable portion so that the movable portion moves toward the aperture to cause the formulation within the chamber to be ejected through the aperture; and wherein the disposable aerosolization element is removable from the housing for installation and disposal; wherein the aerosolizing element is configured to prevent contact of the formulation with the motion transfer member and the piezoelectric element and to prevent contact of particles and impurities exhaled by the patient with the motion transfer member and the piezoelectric element. In the above disclosed embodiments the aerosolizing element comprises a reservoir with a pierceable spike or needle extending upwardly from a vial seat located at the top of the reservoir. The spike body defines a first flow channel extending between an upper end of the spike body and the reservoir to allow the formulation within the vial to flow into the reservoir. A second flow passage in the spike body extends between the upper end of the spike body and the air inlet and opening formed in the vial seat. The reservoir may also be provided with an air outlet or opening. The air inlet and opening of the second flow channel being in fluid communication with the interior of the vial; the reservoir part is also arranged at the opening communicated with the outside air, which is unfavorable for storing liquid, so that the aerosolization element in the technical scheme can only be used once, so that the drug effect is not influenced, and the aerosolization element is not suitable for the spraying device which needs long-time and repeated use.
Disclosure of Invention
The invention aims to provide a micro-droplet spraying device which can automatically suck back unused liquid flowing out of a liquid container, well isolate micro-droplets from external air and prolong the storage life of the liquid.
The aim of the invention is realized by the following technical scheme: a micro-droplet spraying device comprises a shell, a connecting part used for connecting a liquid outlet part of a liquid container and a communicating pipe arranged on the connecting part and used for being inserted into the liquid container; one end of the connecting part, which is used for connecting the liquid outlet part of the liquid container, is provided with a slit, and a liquid flowing cavity communicated with the slit and used for flowing micro liquid drops is arranged in the connecting part; one end of the liquid flow cavity, which is far away from the slit, is connected with a liquid outlet pipe, a liquid outlet hole is formed in the outer wall of the liquid outlet cavity, and a piezoelectric actuator for driving the outer wall to vibrate is arranged on the outer wall;
one end of the communicating pipe far away from the slit is communicated with a closed extrusion cavity, and the wall forming the extrusion cavity is made of soft materials;
one end of the liquid outlet cavity, which is far away from the liquid outlet hole, is communicated with an air pressure balance hole, and the air pressure balance hole is communicated with the outside air.
By adopting the technical scheme, the liquid container is connected with the connecting part; when liquid spraying is needed, the extrusion cavity is extruded, air in the extrusion cavity enters the liquid container through the communicating pipe, the pressure in the liquid container is increased, and the pressurized liquid flows from the slit to the liquid flowing cavity and then flows to the liquid outlet pipe to reach the liquid outlet cavity; the piezoelectric actuator transmits the vibration to the liquid in the liquid outlet cavity, and the liquid is sprayed out from the liquid outlet hole to reach eyes or other affected parts; after the spraying is finished, the pressure on the extrusion cavity is released, the extrusion cavity is restored, the air pressure in the extrusion cavity is reduced, the liquid in the liquid container enters the communicating pipe, the pressure in the liquid container is also smaller than the external atmospheric pressure, the external air enters the liquid outlet cavity through the air pressure balance hole, and the residual liquid in the liquid outlet cavity is pressed to flow into the liquid outlet pipe, then reaches the liquid flowing cavity and enters the slit. Therefore, the micro liquid drops only flow out of or suck back the liquid through the liquid flowing cavity, the liquid outlet pipe, the liquid outlet cavity and the like, are not used for storing the liquid, relatively, greatly reduce the contact between the liquid and the air in the storage process, and are beneficial to prolonging the service life of the liquid. The slit is smaller, liquid can only pass through the slit under certain pressure, so that the liquid is prevented from freely falling into the liquid inlet cavity, and the isolation effect is better.
The diameter of the communicating pipe can be set relatively smaller, and the communicating pipe is suitable for delivering liquid through a narrow passage which can not be punctured and destroyed.
The invention is further provided with: the micro-droplet spraying device also comprises an air transition cavity, wherein the air pressure balance hole is formed in the wall forming the air transition cavity; an air inlet hole communicated with the air transition cavity is formed in the liquid outlet cavity.
Through adopting above-mentioned technical scheme, the effect of fine transition is played in the air transition chamber, can open the atmospheric pressure balance hole like this littleer, also can satisfy after the hydrojet is accomplished air admission play liquid chamber as soon as possible, and the extrusion chamber resumes sooner. External foreign matters are not easy to enter the liquid outlet cavity through the air pressure balance hole.
The invention is further provided with: an air purifying agent or an air purifying device is arranged in the air transition cavity.
Through adopting above-mentioned technical scheme, air purification agent or air purification device can be fine purify outside air, and air after the purification gets into out the liquid chamber, and is better to the protection performance of liquid, does benefit to the drug effect that further keeps liquid.
The invention is further provided with: the liquid flowing cavity comprises a vertical liquid flowing part communicated with the slit and extending towards the liquid outlet cavity and a pre-liquid storing part communicated with one end of the vertical liquid flowing part far away from the slit, and a liquid outlet channel is formed in the bottom of the side wall of the pre-liquid storing part; one end of the liquid outlet channel far away from the vertical liquid flow part is communicated with the liquid outlet pipe.
By adopting the technical scheme, on one hand, the liquid outlet stroke is prolonged, and then the outside air is less prone to pollute the liquid; on the other hand, the liquid outlet is more smooth.
The invention is further provided with: the pre-reservoir is tapered.
Through adopting above-mentioned technical scheme, the stock solution portion sets up to the toper in advance, has played fine cushioning effect, does benefit to preliminary concentration of liquid, and the liquid that gets into the drain pipe is also more concentrated, is difficult to have the bubble, and the user experiences and feels better.
The invention is further provided with: the communicating pipe is penetrated with a liquid flowing cavity, and the slit is arranged around the communicating pipe.
By adopting the technical scheme, the slit can be formed only by inserting the communicating pipe on the liquid containing part, the size of the slit can be conveniently and rapidly adjusted through the outer diameter of the communicating pipe, the liquid in the liquid container can be more conveniently extruded out through the narrow slit, and the liquid which is not ejected out of the liquid outlet cavity can be also conveniently returned to the liquid container; the manufacturing process is very simple, and is favorable for saving space, and on the other hand, the communicating pipe does not need to be particularly sealed, so that the process and the cost are favorable for saving.
The invention is further provided with: the micro-droplet spraying device also comprises a movable cover which is movably arranged on the shell and used for shielding the liquid outlet.
Through adopting above-mentioned technical scheme, the movable cover lid is established in play liquid hole department, does benefit to keeping the cleanness of play liquid hole, need not often wash, does benefit to the save.
The invention is further provided with: the shell is also provided with an extrusion device for compressing the extrusion cavity, and the extrusion device comprises a pressing part rotationally connected to the shell and a driving piece for driving the pressing part to rotate.
Through adopting above-mentioned technical scheme, driving piece drive pressure moves the portion rotation, and then extrusion device, simple structure, convenient operation is swift.
The invention is further provided with: the pressing part is provided with a torsion spring to realize automatic resetting of the pressing part after compressing the extrusion cavity.
By adopting the technical scheme, the torsion spring realizes automatic reset of the pressing part, is simpler to operate, and is also beneficial to automatically sucking liquid back to the liquid container.
The invention is further provided with: the driving piece comprises a movable cover which is connected to the shell in a sliding way and a sliding plate which is fixedly connected with the movable cover, and the sliding plate is provided with a driving plate; the driving plate comprises an inclined plane and a vertical plane, and the inclined plane and the sliding direction of the driving plate form an acute angle; the pressing part comprises a pressing plate for compressing the extrusion cavity and a driven end attached to the driving part; the pressing plate and the driven end are respectively arranged at two ends of the rotating shaft of the pressing part.
By adopting the technical scheme, when liquid needs to be sprayed out, the movable cover is pushed to drive the sliding plate to slide, and then the driving plate also slides, namely the driven end is transited from being attached to the inclined plane to being attached to the vertical plane, and then the pressing plate is driven to rotate to press the extrusion cavity, so that the liquid is extruded; after the liquid is sprayed, the movable cover is pushed back to drive the sliding plate to slide, and then the driving plate also slides, the driven end is jointed with the vertical surface to be jointed with the inclined surface under the acting force of the torsion spring, and the pressing plate moves in the direction away from the extrusion cavity. The whole operation is simple and quick, the structure is compact, the volume is small, and the use is more convenient.
In summary, the beneficial technical effects of the invention are as follows:
1. firstly, connecting a liquid container with a connecting part; when liquid spraying is needed, the extrusion cavity is extruded, air in the extrusion cavity enters the liquid container through the communicating pipe, the pressure in the liquid container is increased, and the pressurized liquid flows from the slit to the liquid flowing cavity and then flows to the liquid outlet pipe to reach the liquid outlet cavity; the piezoelectric actuator vibrates to spray the liquid in the liquid outlet cavity from the liquid outlet hole to reach eyes or other affected parts; after the spraying is finished, the pressure on the extrusion cavity is released, external air enters the liquid outlet cavity through the air pressure balance hole, residual liquid in the liquid outlet cavity is pressed to flow into the liquid outlet pipe, then the liquid reaches the liquid outlet cavity, and the liquid enters the slit. Therefore, the micro liquid drops only flow out of or suck back the liquid through the liquid flowing cavity, the liquid outlet pipe, the liquid outlet cavity and the like, are not used for storing the liquid, relatively, greatly reduce the contact between the liquid and the air in the storage process, and are beneficial to prolonging the service life of the liquid. The slit is smaller, liquid can only pass through the slit under certain pressure, so that the liquid is prevented from freely falling into the liquid inlet cavity, and the isolation effect is better.
2. The air transition cavity plays a good transition role, so that the air pressure balance hole can be opened smaller, the air can enter the liquid outlet cavity as soon as possible after liquid spraying is completed, and the extrusion cavity is recovered faster. External foreign matters are not easy to enter the liquid outlet cavity through the air pressure balance hole.
3. When liquid is required to be sprayed out, the movable cover is pushed to drive the sliding plate to slide, and then the driving plate also slides, namely the driven end is transited from being attached to the inclined plane to being attached to the vertical plane, and then the pressing plate is driven to rotate to press the extrusion cavity, so that the liquid is extruded; after the liquid is sprayed, the movable cover is pushed back to drive the sliding plate to slide, and then the driving plate also slides, the driven end is jointed with the vertical surface to be jointed with the inclined surface under the acting force of the torsion spring, and the pressing plate moves in the direction away from the extrusion cavity. The whole operation is simple and quick, the structure is compact, the volume is small, and the use is more convenient.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present invention;
FIG. 2 is a schematic view of the internal structure of the liquid flow in an embodiment of the present invention;
fig. 3 is a schematic view of the structure of the extrusion apparatus in the embodiment of the present invention.
In the figure, 1, a shell; 11. a movable cover; 12. a pressing part; 121. a torsion spring; 122. a pressing plate; 123. a driven end; 131. a sliding plate; 132. a driving plate; 1321. an inclined plane; 1322. a vertical surface; 2. a connection part; 21. a fluid chamber; 211. a vertical liquid flow section; 212. a pre-reservoir; 213. a liquid outlet channel; 22. a liquid outlet pipe; 23. a slit; 3. an extrusion chamber; 31. a communicating pipe; 4. a liquid outlet cavity; 41. a liquid outlet hole; 42. an air inlet hole; 5. an air transition chamber; 51. an air pressure balance hole; 6. a piezoelectric actuator; 7. a liquid container.
Detailed Description
The invention is described in further detail below with reference to the drawings and examples.
As shown in fig. 1 and 2, the micro-droplet ejection apparatus comprises a housing 1, a connection part 2 for connecting the liquid outlet part of a liquid container 7, and a communication pipe 31 provided on the connection part 2 for inserting into the liquid container 7; one end of the connecting part 2, which is used for connecting the liquid outlet part of the liquid container 7, is provided with a slit 23, and a liquid flowing cavity 21 communicated with the slit 23 and used for flowing micro liquid drops is arranged in the connecting part 2; one end of the liquid outlet cavity 21 far away from the slit 23 is connected with a liquid outlet pipe 22, one end of the liquid outlet pipe 22 far away from the liquid outlet cavity 21 is communicated with a liquid outlet cavity 4, the liquid outlet pipe 22 extends to the bottom of the liquid outlet cavity 4, a liquid outlet hole 41 is formed in the outer wall forming the liquid outlet cavity 4, a piezoelectric actuator 6 for driving the outer wall to vibrate is arranged on the outer wall, and an energy conducting sheet (not shown in the figure) is arranged between the piezoelectric actuator 6 and the outer wall; one end of the communicating pipe 31 far away from the slit 23 is communicated with a closed extrusion cavity 3, and the wall forming the extrusion cavity 3 is made of soft materials; one end of the liquid outlet cavity 4 far away from the liquid outlet hole 41 is communicated with an air pressure balance hole 51, and the air pressure balance hole 51 is communicated with the outside air.
The liquid container 7 is connected with the connecting part 2, and the communicating pipe 31 is inserted into the liquid container 7; when liquid spraying is needed, the extrusion cavity 3 is extruded, the extrusion cavity 3 is restored, the air pressure in the extrusion cavity 3 is reduced, the liquid in the liquid container 7 enters the communicating pipe 31, the pressure in the liquid container 7 is also smaller than the external atmospheric pressure, the air in the extrusion cavity 3 enters the liquid container 7 through the communicating pipe 31, the pressure in the liquid container 7 is increased, and the pressurized liquid flows from the slit 23 to the liquid flowing cavity 21 and then flows to the liquid outlet pipe 22 to reach the liquid outlet cavity 4; the piezoelectric actuator 6 vibrates to spray the liquid in the liquid outlet cavity 4 from the liquid outlet hole 41 to reach eyes or other affected parts; after the spraying is finished, the pressure on the extrusion cavity 3 is released, external air enters the liquid outlet cavity 4 through the air pressure balance hole 51, residual liquid in the liquid outlet cavity 4 is pressed to flow into the liquid outlet pipe 22, then reaches the liquid outlet cavity 21 and enters the slit 23. Therefore, the micro-droplets only flow out of or suck back the liquid through the liquid flowing cavity 21, the liquid outlet pipe 22, the liquid outlet cavity 4 and the like, are not used for storing the liquid, relatively, greatly reduce the contact between the liquid and air in the storage process, and are beneficial to prolonging the service life of the liquid. The slit 23 is smaller, and liquid can only pass through the slit 23 under certain pressure, so that the liquid is prevented from freely falling into the liquid inlet cavity 21, and the isolation effect is better.
The soft material forming the walls of the extrusion chamber 3 may be silica gel or a thermoplastic elastomer.
The liquid outlet 41 and the piezoelectric actuator 6 are arranged oppositely, so that energy conduction is facilitated, and the liquid spraying effect is better. The liquid outlet pipe 22 is positioned at the position where one end of the liquid outlet cavity 4 deviates from the direction opposite to the liquid outlet hole 41, and the liquid can be sprayed when the whole liquid outlet hole is full. The micro-droplet ejection device further comprises an air transition cavity 5, and an air pressure balance hole 51 is formed in the wall forming the air transition cavity 5; the liquid outlet cavity 4 is provided with an air inlet hole 42 communicated with the air transition cavity 5, the aperture of the air inlet hole 42 is 0.4-0.8mm, good ventilation can be realized, water is prevented from being sucked by capillary effect to block the hole, the air inlet hole 42 is preferably 0.5mm, and an air pressure balance hole 51 is preferably formed above the wall forming the air transition cavity 5.
Further, the hole diameters of the air inlet holes 42 and the air pressure balance holes 51 are substantially the same, so that the ejection and the suction of the liquid drops can be better realized.
The air transition cavity 5 plays a good transition role, can open the air pressure balance hole 51 smaller, can also meet the requirement that air enters the liquid outlet cavity 4 as soon as possible after liquid spraying is completed, the extrusion cavity 3 recovers faster, and external foreign matters are not easy to enter the liquid outlet cavity 4 through the air pressure balance hole 51.
An air purifying agent or an air purifying device (not shown in the figure) is provided in the air transition chamber 5. The air purifying agent or the air purifying device can purify the external air well, and the purified air enters the liquid outlet cavity 4, so that the liquid has better protection performance, and the liquid efficacy is further maintained.
As shown in fig. 2, the liquid flowing cavity 21 comprises a vertical liquid flowing part 211 communicated with the slit 23 and extending towards the liquid outlet cavity 4, and a pre-liquid storing part 212 communicated with one end of the vertical liquid flowing part 211 far away from the slit 23, wherein a liquid outlet channel 213 is formed at the bottom of the side wall of the pre-liquid storing part 212; the end of the liquid outlet channel 213 remote from the vertical liquid portion 211 communicates with the liquid outlet pipe 22. According to the scheme, on one hand, the liquid outlet stroke is prolonged, and further, the outside air is less prone to polluting liquid; on the other hand, the liquid outlet is more smooth.
In this embodiment, the pre-liquid storage portion 212 is tapered, which plays a good role in buffering, facilitates the primary concentration of liquid, and the liquid entering the liquid outlet pipe 22 is more concentrated, so that bubbles are not easy to exist, and the user experience is better. When the liquid drops are sucked back, the bubbles mixed with bubbles in the liquid drops can be well buffered in the pre-liquid storage part 212, and the bubbles are more easily sucked back into the liquid container 7, so that the next extrusion of the liquid drops is facilitated.
The diameter of one end of the pre-liquid storage part 212 close to the connecting part 2 is larger than that of one end of the pre-liquid storage part 212 far away from the connecting part 2, so that liquid flowing down by the vertical liquid flow part 211 can be well received, and liquid leakage is not easy; one end of the vertical liquid flowing part 211 connected with the slit 23 is arranged to be conical, and the diameter of one end of the vertical liquid flowing part 211 connected with the slit 23 is smaller than that of one end of the vertical liquid flowing part 211 far away from the slit 23, so that guided liquid can be well received.
The communicating pipe 31 penetrates through the liquid flowing cavity 21, the slit 23 is arranged around the communicating pipe 31, the slit 23 can be formed only by inserting the communicating pipe 31 on the liquid containing part 7, the size of the slit 23 can be conveniently and rapidly adjusted through the outer diameter of the communicating pipe 31, the liquid in the liquid containing part 7 can be more conveniently extruded out through the narrow slit 23, and the liquid which is not ejected out of the liquid outlet cavity 4 can be also conveniently returned to the liquid containing part 7; the manufacturing process is very simple, and is beneficial to saving space, and on the other hand, the communicating pipe 31 does not need to be particularly sealed, so that the process and the cost are beneficial to saving.
In this embodiment, the center line of the communicating pipe 31, the center line of the liquid container 7 and the center line of the liquid flowing cavity 21 are all coincident, the liquid outlet channel 213 extends in a direction away from the liquid flowing cavity 21, and the bottom of the liquid outlet channel 213 is higher than the bottom of the side wall of the pre-liquid storage part 212, so that the buffering effect of the pre-liquid storage part 212 is better; one end of the liquid outlet pipe 22 is connected with the liquid outlet channel 213, penetrates through the air transition cavity 5 and extends into the liquid outlet cavity 4, and a hole between the air transition cavity 5 and the liquid outlet cavity 4 for penetrating the liquid outlet pipe 22 is conical, so that the liquid outlet pipe 22 is convenient to penetrate through, and air leakage and liquid leakage are not easy to occur.
As shown in fig. 3, the micro-droplet ejection apparatus further includes a movable cover 11 movably disposed on the housing 1 for shielding the liquid outlet 41. The movable cover 11 is covered at the liquid outlet 41, which is beneficial to keeping the liquid outlet 41 clean, and is beneficial to preservation without frequent cleaning.
The casing 1 is further provided with a squeezing device for compressing the squeezing chamber 3, and the squeezing device comprises a pressing part 12 rotatably connected to the casing 1 and a driving member for driving the pressing part 12 to rotate. The driving piece drives the pressing part 12 to rotate, so that the device is extruded, and the structure is simple, and the operation is convenient and quick. The pressing portion 12 is provided with a torsion spring 121 to restrict the pressing portion 12 from freely rotating in the direction of pressing the pressing chamber 3. The torsion spring 121 realizes automatic resetting of the pressing part 12, and the operation is simpler.
The driving piece comprises a movable cover 11 which is connected on the shell 1 in a sliding way and a sliding plate 131 which is fixedly connected with the movable cover 11, and the sliding plate 131 is provided with a driving plate 132; the driving plate 132 includes a slope 1321 and a vertical surface 1322, and the slope 1321 forms an acute angle with the sliding direction of the driving plate 132; the pressing part 12 comprises a pressing plate 122 for compressing the pressing cavity 3 and a driven end 123 attached to the driving part; the pressing plate 122 and the driven end 123 are respectively arranged at two ends of the rotating shaft of the pressing part 12.
When liquid needs to be sprayed, the movable cover 11 is pushed to drive the sliding plate 131 to slide, and then the driving plate 132 also slides, namely the driven end 123 is transited from being attached to the inclined plane 1321 to being attached to the vertical plane 1322, and then the pressing plate 122 is driven to rotate to press the extrusion cavity 3, so that liquid is extruded; after the liquid is sprayed, the movable cover 11 is pushed back to drive the sliding plate 131 to slide, and then the driving plate 132 also slides, so that the driven end 123 is transited from being attached to the vertical surface 1322 to being attached to the inclined surface 1321 under the acting force of the torsion spring 121, and the pressing plate 122 moves in a direction away from the extrusion cavity 3. The whole operation is simple and quick, the structure is compact, the volume is small, and the use is more convenient. The embodiments of the present invention are all preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (8)
1. The micro-droplet spraying device is characterized by comprising a shell (1), a connecting part (2) for connecting a liquid outlet part of a liquid container (7) and a communicating pipe (31) arranged on the connecting part (2) and used for being inserted into the liquid container (7); one end of the connecting part (2) used for connecting the liquid outlet part of the liquid container (7) is provided with a slit (23), and a liquid flowing cavity (21) communicated with the slit (23) and used for flowing micro liquid drops is arranged in the connecting part (2); one end of the liquid outlet cavity (21) far away from the slit (23) is connected with a liquid outlet pipe (22), one end of the liquid outlet pipe (22) far away from the liquid outlet cavity (21) is communicated with a liquid outlet cavity (4), the liquid outlet pipe (22) extends to the bottom of the liquid outlet cavity (4), a liquid outlet hole (41) is formed in the outer wall of the liquid outlet cavity (4), and a piezoelectric actuator (6) for driving the outer wall to vibrate is arranged on the outer wall;
one end of the communicating pipe (31) far away from the slit (23) is communicated with a closed extrusion cavity (3), and the wall forming the extrusion cavity (3) is made of soft materials;
one end of the liquid outlet cavity (4) far away from the liquid outlet hole (41) is communicated with an air pressure balance hole (51), and the air pressure balance hole (51) is communicated with the outside air;
the shell (1) is also provided with an extrusion device for compressing the extrusion cavity (3), and the extrusion device comprises a pressing part (12) rotatably connected to the shell (1) and a driving piece for driving the pressing part (12) to rotate;
the pressing part (12) is provided with a torsion spring (121) to realize automatic resetting of the pressing part (12) after compressing the extrusion cavity (3).
2. A micro-droplet ejection apparatus according to claim 1, further comprising an air transition chamber (5), wherein the air pressure balancing hole (51) is provided in a wall forming the air transition chamber (5); an air inlet hole (42) communicated with the air transition cavity (5) is formed in the liquid outlet cavity (4).
3. A micro-droplet ejection apparatus according to claim 2, characterized in that an air cleaning agent or air cleaning device is arranged in the air transition chamber (5).
4. The micro-droplet ejection apparatus according to claim 1, wherein the liquid flow chamber (21) comprises a vertical liquid flow portion (211) which is communicated with the slit (23) and extends towards the liquid outlet chamber (4), and a pre-liquid storage portion (212) which is communicated with one end of the vertical liquid flow portion (211) far away from the slit (23), wherein a liquid outlet channel (213) is formed at the bottom of the side wall of the pre-liquid storage portion (212); one end of the liquid outlet channel (213) far away from the vertical liquid flow part (211) is communicated with the liquid outlet pipe (22).
5. A micro-droplet ejection apparatus according to claim 4, wherein the pre-reservoir (212) is provided in a conical shape.
6. The micro-droplet ejection apparatus according to claim 1, wherein the communicating tube (31) is provided with a flow chamber (21) therethrough, and the slit (23) is provided around the communicating tube (31).
7. A micro-droplet ejection apparatus according to any one of claims 1-6, further comprising a movable cover (11) movably arranged on the housing (1) for shielding the liquid outlet opening (41).
8. The micro-droplet ejection apparatus according to claim 1, wherein the driving member comprises a movable cover (11) slidably connected to the housing (1), and a sliding plate (131) fixedly connected to the movable cover (11), and the sliding plate (131) is provided with a driving plate (132); the driving plate (132) comprises an inclined surface (1321) and a vertical surface (1322), and the inclined surface (1321) forms an acute angle with the sliding direction of the driving plate (132); the pressing part (12) comprises a pressing plate (122) for compressing the pressing cavity (3) and a driven end (123) attached to the driving part; the pressing plate (122) and the driven end (123) are respectively arranged at two ends of the rotating shaft of the pressing part (12).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910090303.XA CN109621180B (en) | 2019-01-30 | 2019-01-30 | Micro-droplet spraying device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910090303.XA CN109621180B (en) | 2019-01-30 | 2019-01-30 | Micro-droplet spraying device |
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| CN109621180A CN109621180A (en) | 2019-04-16 |
| CN109621180B true CN109621180B (en) | 2023-11-14 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110052298A (en) * | 2019-05-09 | 2019-07-26 | 中国计量大学 | A method of vibration pipeline control micro-fluidic chip generates microlayer model |
| CN110302407B (en) * | 2019-06-26 | 2023-11-28 | 温州维科生物实验设备有限公司 | Portable space degerming device |
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| CN109621180A (en) | 2019-04-16 |
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