CN111299001A - Superfine atomizing nozzle applied to spray freeze drying device - Google Patents
Superfine atomizing nozzle applied to spray freeze drying device Download PDFInfo
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- CN111299001A CN111299001A CN202010176318.0A CN202010176318A CN111299001A CN 111299001 A CN111299001 A CN 111299001A CN 202010176318 A CN202010176318 A CN 202010176318A CN 111299001 A CN111299001 A CN 111299001A
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- nozzle
- joint
- drying device
- spray
- main body
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/06—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane
- B05B7/062—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet
- B05B7/066—Spray pistols; Apparatus for discharge with at least one outlet orifice surrounding another approximately in the same plane with only one liquid outlet and at least one gas outlet with an inner liquid outlet surrounded by at least one annular gas outlet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/08—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point
- B05B7/0807—Spray pistols; Apparatus for discharge with separate outlet orifices, e.g. to form parallel jets, i.e. the axis of the jets being parallel, to form intersecting jets, i.e. the axis of the jets converging but not necessarily intersecting at a point to form intersecting jets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/02—Spray pistols; Apparatus for discharge
- B05B7/10—Spray pistols; Apparatus for discharge producing a swirling discharge
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
- F26B5/06—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum the process involving freezing
Abstract
The invention discloses a superfine atomizing nozzle applied to a spray freeze drying device, which is suitable for providing uniform superfine atomizing conditions for the preparation of various bioaerosol samples such as bacteria, viruses, spores, toxins and the like.
Description
Technical Field
The invention relates to a superfine atomizing nozzle applied to a spray freeze drying device, which is suitable for providing uniform superfine atomization for the preparation of various bioaerosol samples such as bacteria, viruses, spores, toxins and the like.
Background
The preparation technology of the spray ultralow-temperature quick-freezing-vacuum freeze-drying cascade coupling aerosolisable biological particle dry powder comprises two key steps: atomizing a liquid biological sample into fine fog drops through an atomizing nozzle, and quickly freezing the fog drops into fine frozen particles through an ultralow temperature environment formed by liquid nitrogen; and carrying out vacuum freeze drying on the frozen particles by a sublimation principle to finally obtain a dry fine particle finished product. Wherein the design of the atomizer device is a key technology.
Liquid atomization refers to the process of liquid becoming a liquid mist or droplets in a gaseous environment under the action of external energy. In order to prepare biological samples such as pathogens meeting the requirements, the aerodynamic diameter of atomized liquid drops needs to be controlled to be 3-5 μm.
The existing nozzle scheme is difficult to realize high-quality atomization under the conditions of smaller liquid flow and pressure supply, and the requirements of biological sample preparation cannot be met due to insufficient fineness and poor uniformity.
Disclosure of Invention
The technical problem solved by the invention is as follows: the defects of the prior art are overcome, the superfine atomizing nozzle applied to the spray freeze drying device is provided, and the problem that high-quality atomization is difficult to realize under the conditions of smaller liquid flow and pressure supply in the existing nozzle scheme is solved.
The purpose of the invention is realized by the following technical scheme: an ultra-fine atomizing nozzle for a spray freeze-drying apparatus, comprising: the gas circuit connector, the nozzle main body, the liquid circuit connector, the spray head and the tightening nut; the nozzle body is of a revolving body structure, a first eccentric through round hole, a second eccentric through round hole and a central through small hole are formed in the nozzle body, the first eccentric through round hole and the second eccentric through round hole are arranged in parallel, the second eccentric through round hole is communicated with the central through small hole, and the central through small hole is positioned at the lower part of the second eccentric through round hole; a first cylindrical boss interface is arranged at the upper part of the side wall of the nozzle main body and is in butt joint with the gas circuit connector, and a channel formed in the gas circuit connector is communicated with a first eccentric straight-through round hole; a second cylindrical boss interface is arranged at the top end of the nozzle main body and is in butt joint with the liquid path joint, and a channel formed in the liquid path joint is communicated with a second eccentric straight-through round hole; the middle part of the nozzle main body is provided with a step with an external thread, and the step with the external thread is screwed with the internal thread of the tightening nut through the thread; the cylindrical section of the nozzle main body is arranged at the lower part of the step, and the outer wall of the cylindrical section is provided with two to three convex guide sections which are inserted into the inner hole of the spray head.
In the superfine atomizing nozzle applied to the spray freeze drying device, the bottom end face of the nozzle main body is provided with the whirlpool device with the truncated cone-shaped structure with the plurality of spiral grooves.
In the superfine atomizing nozzle applied to the spray freeze drying device, the outer wall of one end of the gas circuit joint is provided with an external thread, the other end of the gas circuit joint is a first hollow cylinder with steps, and the middle part of the gas circuit joint is provided with a first hexagonal convex step; wherein, the first cylindrical boss interface is connected with the first hollow cylinder of step.
In the superfine atomizing nozzle applied to the spray freeze drying device, one end of the liquid path joint is a joint with an inner cone shape, the other end of the liquid path joint is a second hollow cylinder with steps, and the middle part of the liquid path joint is provided with a second hexagonal outer convex step; wherein the second cylindrical boss interface is connected with the second hollow cylinder of the step.
In the above-mentioned superfine atomizing nozzle who is applied to spray freeze drying device, the shower nozzle is the cavity solid of revolution that has the step, overlaps in the outside of nozzle main part bottom cylinder section, the bottom of shower nozzle is round platform shape structure, constitutes the gas circuit with the nozzle main part and sprays the runner, the surface cover of the top step of shower nozzle has annular sealing washer, compresses tightly through the threaded connection of nozzle main part and tightening nut, realizes sealedly.
In the superfine atomizing nozzle applied to the spray freeze drying device, the spiral groove of the swirler is processed along the generatrix direction of the circular truncated cone of the swirler, and the section of the spiral groove can be triangular, rectangular, trapezoidal or semicircular.
In the above-mentioned superfine atomizing nozzle who is applied to spray freeze-drying device, the external screw thread of the one end of gas circuit joint is a minute cone screw thread, and a minute cone screw thread is connected with upper reaches gas circuit pipeline, and operating pressure is within 0.5 MPa.
In the superfine atomizing nozzle applied to the spray freeze drying device, the inner conical connector of the liquid path connector is connected with an upstream liquid path pipeline, and the working pressure is within 0.3 MPa.
In the above superfine atomizing nozzle applied to the spray freeze drying device, the aperture of the central straight-through small hole is as follows: d-6.464 v0.35(ii) a Wherein d is the aperture of the central straight-through small hole, and v is the kinematic viscosity of the medium.
In the superfine atomizing nozzle applied to the spray freeze drying device, the groove width of the spiral groove is 0.4 mm-0.6 mm, and the thread pitch is 8 mm-12 mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) the nozzle provided by the invention can utilize high-speed, stable and uniform rotating airflow to perform external mixing type impact on the jet flow of the liquid working medium under the condition of low flow and low pressure without damaging bioactivity so as to obtain tiny uniform atomized liquid drops and meet the preparation requirement of 3-5 micron aerodynamic diameter atomization of a bioaerosol sample.
(2) According to the nozzle provided by the invention, the swirl device with the spiral groove is designed at the head part of the nozzle, and the pressurized air flow is forced to be sprayed out through the spiral groove through tight fit with the inner wall of the nozzle, so that multiple strands of uniform rotating air flows are obtained to realize impact on liquid jet flow, and the improvement of atomization uniformity and centering property is facilitated.
(3) The spray nozzle provided by the invention can be properly changed in atomization distribution and atomization fineness by adjusting the pressure of the gas circuit, so that the spray nozzle is suitable for the preparation requirements of various biological reagents.
(4) The nozzle provided by the invention can adapt to the atomizing and spraying requirements of biological reagents with different viscosities by changing the diameter of the central circular hole of the nozzle main body.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
FIG. 1 is a schematic structural view of an ultrafine atomizing nozzle;
FIG. 2 is a schematic view of a gas path flow channel structure;
FIG. 3 is a schematic view of a fluid passage structure;
FIG. 4 is a schematic view of the structure of the swirler;
FIG. 5 is a schematic diagram of external mixing impingement atomization.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
As shown in fig. 1, the present invention provides an ultrafine atomizing nozzle applied to a spray freeze-drying device, comprising a gas path joint 1, a nozzle body 2, a liquid path joint 3, a spray head 4 and a tightening nut 6; wherein the content of the first and second substances,
the nozzle main body 2 is of a revolving body structure, a first eccentric through round hole 21, a second eccentric through round hole 22 and a central through small hole 23 are formed in the nozzle main body 2, wherein the first eccentric through round hole 21 and the second eccentric through round hole 22 are arranged in parallel, the second eccentric through round hole 22 is communicated with the central through small hole 23, and the central through small hole 23 is positioned at the lower part of the second eccentric through round hole 22; a first cylindrical boss interface 24 is arranged at the upper part of the side wall of the nozzle main body 2, the first cylindrical boss interface 24 is in butt joint with the gas circuit connector 1, and a channel formed in the gas circuit connector 1 is communicated with the first eccentric straight-through round hole 21; a second cylindrical boss interface 25 is arranged at the top end of the nozzle main body 2, the second cylindrical boss interface 25 is in butt joint with the liquid path joint 3, and a channel formed in the liquid path joint 3 is communicated with a second eccentric straight-through round hole 22; the middle part of the nozzle main body 2 is provided with a step 26 with an external thread, and the step 26 with the external thread is screwed with the internal thread of the tightening nut 6 through the thread; the cylindrical section 27 of the nozzle body 2 is arranged at the lower part of the step 26, and the outer wall of the cylindrical section 27 is provided with two to three convex guide sections which are inserted into the inner hole of the spray head 4.
Specifically, the nozzle body 2 is a revolving body with an eccentric through round hole, a top eccentric round hole and a bottom central through small hole inside; wherein, the eccentric straight-through round hole of the nozzle body 2 is positioned at the outer side, and the other eccentric round hole at the top is close to the center and communicated with the straight-through small hole at the bottom center; the top end of the nozzle main body 2 is provided with a lateral cylindrical boss interface which is butted with the gas circuit joint 1, and an upper cylindrical boss interface which is butted with the liquid circuit joint 3, wherein a round hole of a cylindrical boss butted with the gas circuit joint 1 is communicated with an outer eccentric straight-through round hole to form a right-angle channel; the middle section of the nozzle body 2 is provided with an external thread step which is screwed and connected with the internal thread of the tightening nut 6 through threads, a cylindrical section with two to three convex blocks on the outer wall is arranged below the external thread step, the cylindrical section is inserted into an inner hole of the nozzle 4, the convex blocks are used for positioning and ensuring the centering property on one hand, and a flow passage for gas to pass through is reserved in gaps among the convex blocks on the other hand; the bottom end of the nozzle main body 2 is a vortex device with a circular truncated cone-shaped structure, the surface of which is provided with a plurality of spiral grooves.
The outer wall of one end of the gas circuit joint 1 is provided with an external thread, the other end of the gas circuit joint 1 is a first hollow cylinder with steps, and the middle of the gas circuit joint 1 is provided with a first hexagonal outer convex step; wherein the first cylindrical boss interface 24 is connected with the first hollow cylinder of the step.
Specifically, the gas circuit connector 1 is a hollow cylinder with a thread at one end and steps at the other end, and a hexagonal convex step is arranged in the middle and used for fixing a wrench to screw the thread; the air passage joint 1 is inserted into an inner hole of a cylindrical boss at one side of the top end of the nozzle body 2 and is fixedly connected through a welding method.
One end of the liquid path joint 3 is a joint with an inner cone shape, the other end of the liquid path joint 3 is a second hollow cylinder with steps, and the middle part of the liquid path joint 3 is provided with a second hexagonal outer convex step; wherein the second cylindrical boss interface 25 is connected with the second hollow cylinder of the step.
Specifically, the liquid path joint 3 is a hollow cylinder with an inner conical quick joint at one end and a step at the other end, and a hexagonal outer convex step is arranged in the middle and used for fixing a wrench, is inserted into an inner hole of a cylindrical boss above the top end of the nozzle main body 2 and is connected and fixed through a welding method.
The nozzle 4 is a hollow revolving body with steps, is sleeved outside the cylindrical section at the bottom end of the nozzle main body 2 and is in close fit positioning with two to three convex guide sections; the bottom end of the spray head 4 is of a round table-shaped structure, the spray head and the nozzle main body 2 form a gas path spray flow channel, the outer side of the step at the top end of the spray head is sleeved with an annular sealing ring 5, and reliable sealing is realized by connecting and pressing the nozzle main body 2 and a tightening nut 6 through threads; the one end of the tightening nut 6 is of an outer hexagonal structure, so that a wrench can be conveniently tightened and fixed, the outer thread of the other end is an equipment interface, the connection of a nozzle and a spray freeze drying device is realized, and the inner hole of the tightening nut 6 is tightly sleeved on the outer side of the spray head 4.
As shown in fig. 2, the working pressure of the auxiliary atomization gas is generally 3 bar-5 bar, and the auxiliary atomization gas enters the nozzle body 2 through the inner hole of the air passage connector 1, flows through the right-angle flow passage of the nozzle body 2, enters the inner cavity formed by the nozzle body 2 and the nozzle 4, and is finally ejected through the swirler flow passage of the nozzle body 2 to generate a rotating air flow with a circumferential velocity.
As shown in figure 3, the liquid working medium for preparing the aerosol sample enters the nozzle body 2 from the inner hole of the liquid path joint 3, flows through the eccentric straight-through hole, enters the small injection hole in the center of the nozzle, and is injected in the form of cylindrical jet flow.
As shown in figure 4, because the outer wall of the injector of the nozzle body 2 is in tight fit with the inner wall of the spray hole 8, the auxiliary atomized airflow is forced to be sprayed out through a plurality of spiral groove airflow channels of the vortex device at the bottom of the nozzle body 2, a certain tangential speed is obtained to form a rotational flow, and the effect of stable and uniform impact is achieved. The section of the spiral groove can be semicircular, rectangular, trapezoidal or triangular, the width of the groove is generally 0.4 mm-0.6 mm, and the pitch of the spiral groove is generally 8 mm-12 mm.
As shown in figure 5, the liquid working medium is sprayed out from the central hole at the bottom of the nozzle main body 2 to form a single-hole jet flow, the auxiliary atomization air flow is sprayed out from the spiral groove of the vortex device of the nozzle main body 2, the jet flow is smashed at the position of an impact point after rotation, so that the jet flow is smashed and atomized to form uniform and fine liquid drops with aerodynamic diameter of 3-5 microns, and the preparation of the dry powder aerosol sample is completed after freeze drying.
The air path joint 1, the nozzle body 2, the liquid path joint 3 and the spray head 4 are all processed by titanium alloy, and have good biocompatibility.
The sealing ring 5 is made of polytetrafluoroethylene plastics, so that the biological compatibility is good, and the sealing performance is good.
The aperture of the central through aperture 23 is: d-6.464 v0.35Where d is the diameter of the central through-hole 23 and v is the kinematic viscosity of the medium. The central straight-through small hole of the nozzle body 2 determines the aperture according to the aperture formula, so that tiny uniform atomized liquid drops can be better obtained.
The heat-insulating shell 6 should be made of a material with good heat insulation, such as teflon material.
The spiral groove of the swirler at the bottom end of the nozzle main body 2 is processed along the generatrix direction of the circular truncated cone of the swirler, the section of the spiral groove can be triangular, rectangular, trapezoidal or semicircular, the width of the spiral groove is generally 0.4 mm-0.6 mm, and the pitch of the spiral groove is generally 8 mm-12 mm.
The number of the spiral grooves is as follows: n is 2Qg/QL(ii) a Wherein Q isgTo assist the volumetric flow of atomising gas, QLIs the volumetric flow rate of the liquid medium. The number of the spiral grooves is obtained according to the formula, multiple strands of uniform rotary air flows can be better obtained to impact liquid jet, and the atomization uniformity and centering property are better improved.
The conical inner hole at the bottom end of the spray head 4 is tightly matched with the outer wall surface of the swirler of the nozzle main body 2 so as to ensure that main air flow flows along the swirl groove flow channel for injection.
The gas circuit joint 1 is generally connected with an upstream gas circuit pipeline by adopting a tapered thread, the working pressure is generally within 0.5MPa, and the gas circuit joint is connected with the nozzle main body 2 by laser welding or electron beam welding.
The liquid path joint 3 is generally connected with an upstream liquid path pipeline by adopting an inner cone type quick joint, the working pressure is generally within 0.3MPa, and the liquid path joint is connected with the nozzle main body 2 by laser welding or electron beam welding.
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (10)
1. The utility model provides a be applied to superfine atomizing nozzle of spray freeze-drying device which characterized in that includes: the gas circuit connector (1), the nozzle body (2), the liquid circuit connector (3), the spray head (4) and the tightening nut (6); wherein the content of the first and second substances,
the nozzle main body (2) is of a revolving body structure, a first eccentric through round hole (21), a second eccentric through round hole (22) and a central through small hole (23) are formed in the nozzle main body (2), wherein the first eccentric through round hole (21) and the second eccentric through round hole (22) are arranged in parallel, the second eccentric through round hole (22) is communicated with the central through small hole (23), and the central through small hole (23) is positioned at the lower part of the second eccentric through round hole (22);
a first cylindrical boss interface (24) is arranged at the upper part of the side wall of the nozzle main body (2), the first cylindrical boss interface (24) is in butt joint with the gas circuit connector (1), and a channel formed in the gas circuit connector (1) is communicated with a first eccentric straight-through round hole (21);
a second cylindrical boss interface (25) is arranged at the top end of the nozzle main body (2), the second cylindrical boss interface (25) is in butt joint with the liquid path joint (3), and a channel formed in the liquid path joint (3) is communicated with a second eccentric straight-through round hole (22);
the middle part of the nozzle main body (2) is provided with a step (26) with an external thread, and the step (26) with the external thread is screwed with the internal thread of the tightening nut (6) through the thread;
the cylindrical section (27) of the nozzle main body (2) is arranged at the lower part of the step (26), and the outer wall of the cylindrical section (27) is provided with two to three convex guide sections which are inserted into an inner hole of the spray head (4).
2. The ultrafine atomizing nozzle for a spray freeze-drying device according to claim 1, wherein: the bottom end face of the nozzle main body (2) is provided with a plurality of whirlpools with spiral grooves and truncated cone-shaped structures.
3. The ultrafine atomizing nozzle for a spray freeze-drying device according to claim 1, wherein: the outer wall of one end of the gas circuit joint (1) is provided with an external thread, the other end of the gas circuit joint (1) is a first hollow cylinder with steps, and the middle of the gas circuit joint (1) is provided with a first hexagonal outer convex step; wherein the first cylindrical boss interface (24) is connected with the first hollow cylinder of the step.
4. The ultrafine atomizing nozzle for a spray freeze-drying device according to claim 1, wherein: one end of the liquid path joint (3) is a joint with an inner cone shape, the other end of the liquid path joint (3) is a second hollow cylinder with steps, and the middle part of the liquid path joint (3) is provided with a second hexagonal outer convex step; wherein the second cylindrical boss interface (25) is connected with a second hollow cylinder of the step.
5. The ultrafine atomizing nozzle for a spray freeze-drying device according to claim 1, wherein: the spray head (4) is a hollow rotary body with steps and is sleeved on the outer side of a cylindrical section at the bottom end of the spray nozzle main body (2), the bottom end of the spray head (4) is of a round table-shaped structure and forms a gas path spraying flow channel with the spray nozzle main body (2), the outer surface of the step at the top end of the spray head (4) is sleeved with a circular sealing ring (5), and the spray head is tightly connected with a screw thread of a tightening nut (6) through the spray nozzle main body (2) to realize sealing.
6. The ultrafine atomizing nozzle for a spray freeze-drying device according to claim 2, wherein: the spiral groove of the swirler is processed along the generatrix direction of the circular truncated cone of the swirler, and the section of the groove can be triangular, rectangular, trapezoidal or semicircular.
7. The ultrafine atomizing nozzle for a spray freeze-drying device according to claim 1, wherein: the external thread at one end of the gas circuit joint (1) is a tapered thread, the tapered thread is connected with an upstream gas circuit pipeline, and the working pressure is within 0.5 MPa.
8. The ultrafine atomizing nozzle for a spray freeze-drying device according to claim 1, wherein: the inner conical joint of the liquid path joint (3) is connected with an upstream liquid path pipeline, and the working pressure is within 0.3 MPa.
9. The ultrafine atomizing nozzle for a spray freeze-drying device according to claim 1, wherein: the aperture of the central through small hole (23) is as follows:
d＝6.464v0.35；
wherein d is the aperture of the central through small hole (23), and v is the kinematic viscosity of the medium.
10. The ultrafine atomizing nozzle for a spray freeze-drying device according to claim 6, wherein: the width of the spiral groove is 0.4 mm-0.6 mm, and the pitch is 8 mm-12 mm.
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| CN202010176318.0A CN111299001B (en) | 2020-03-13 | 2020-03-13 | Superfine atomizing nozzle applied to spray freeze drying device |
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| CN202010176318.0A CN111299001B (en) | 2020-03-13 | 2020-03-13 | Superfine atomizing nozzle applied to spray freeze drying device |
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| CN111299001B CN111299001B (en) | 2021-07-13 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111721678A (en) * | 2020-07-06 | 2020-09-29 | 山东艾科达生物科技有限公司 | Lockable and bufferable sample adding nozzle seat |
| CN111992352A (en) * | 2020-08-26 | 2020-11-27 | 常州市龙鑫智能干燥科技有限公司 | Superfine liquid atomization device for spray drying |
| CN114682407A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Jet type swirl groove cross hole ejector |
| CN115284747A (en) * | 2022-09-02 | 2022-11-04 | 苏州微知电子科技有限公司 | Aerosol point-jet nozzle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111721678B (en) * | 2020-07-06 | 2021-07-02 | 山东艾科达生物科技有限公司 | Lockable and bufferable sample adding nozzle seat |
| CN111992352A (en) * | 2020-08-26 | 2020-11-27 | 常州市龙鑫智能干燥科技有限公司 | Superfine liquid atomization device for spray drying |
| CN114682407A (en) * | 2020-12-31 | 2022-07-01 | 大连理工大学 | Jet type swirl groove cross hole ejector |
| CN115284747A (en) * | 2022-09-02 | 2022-11-04 | 苏州微知电子科技有限公司 | Aerosol point-jet nozzle |
| CN115284747B (en) * | 2022-09-02 | 2024-03-29 | 苏州微知电子科技有限公司 | Aerosol spot-spraying nozzle |
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