WO2019144894A1 - 运动控制机构、吐液枪头、微液滴生成装置及生成方法、流体驱动机构及流体驱动方法、微液滴生成方法以及吐液枪头表面处理方法 - Google Patents
运动控制机构、吐液枪头、微液滴生成装置及生成方法、流体驱动机构及流体驱动方法、微液滴生成方法以及吐液枪头表面处理方法 Download PDFInfo
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- WO2019144894A1 WO2019144894A1 PCT/CN2019/072926 CN2019072926W WO2019144894A1 WO 2019144894 A1 WO2019144894 A1 WO 2019144894A1 CN 2019072926 W CN2019072926 W CN 2019072926W WO 2019144894 A1 WO2019144894 A1 WO 2019144894A1
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- liquid
- head
- outlet end
- ejector
- syringe
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/0241—Drop counters; Drop formers
- B01L3/0268—Drop counters; Drop formers using pulse dispensing or spraying, eg. inkjet type, piezo actuated ejection of droplets from capillaries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/0241—Drop counters; Drop formers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L3/00—Containers or dishes for laboratory use, e.g. laboratory glassware; Droppers
- B01L3/02—Burettes; Pipettes
- B01L3/0286—Ergonomic aspects, e.g. form or arrangement of controls
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M1/00—Apparatus for enzymology or microbiology
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N35/1009—Characterised by arrangements for controlling the aspiration or dispense of liquids
- G01N35/1016—Control of the volume dispensed or introduced
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
- B01L2200/06—Fluid handling related problems
- B01L2200/0673—Handling of plugs of fluid surrounded by immiscible fluid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2300/00—Additional constructional details
- B01L2300/08—Geometry, shape and general structure
- B01L2300/0832—Geometry, shape and general structure cylindrical, tube shaped
- B01L2300/0838—Capillaries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/02—Drop detachment mechanisms of single droplets from nozzles or pins
- B01L2400/021—Drop detachment mechanisms of single droplets from nozzles or pins non contact spotting by inertia, i.e. abrupt deceleration of the nozzle or pin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0403—Moving fluids with specific forces or mechanical means specific forces
- B01L2400/0433—Moving fluids with specific forces or mechanical means specific forces vibrational forces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L2400/00—Moving or stopping fluids
- B01L2400/04—Moving fluids with specific forces or mechanical means
- B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
- B01L2400/0478—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure pistons
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N35/00—Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
- G01N35/10—Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices
- G01N2035/1027—General features of the devices
- G01N2035/1034—Transferring microquantities of liquid
Definitions
- the present application relates to the technical field of measuring and distributing a small amount of liquid, and particularly to a motion control mechanism, a liquid ejection nozzle, a microdroplet generating device and a generating method, a fluid driving mechanism, a fluid driving method, a microdroplet generating method, and The surface treatment method of the spit gun head.
- micro-liquid handling is to further split the micro-liter liquid into micro-reaction systems in nanoliter or even picoliter volumes.
- One of the main technical branches of microreaction system generation is the formation of emulsified microdroplets.
- various micro-droplet generation techniques have been reported in the literature, such as membrane emulsification, spray emulsification, microfluidic chip, and sputum injection/injection.
- the spit gun head injection/ejection method as the latest micro-droplet generation technology, has a good application prospect in the generation of micro-droplets and the control of consumable cost.
- the traditional spit gun head is generally straight tubular.
- the spit gun head moves rapidly along its extension direction toward the end of the outlet end, the generated microdroplets are broken.
- the vibration frequency of the spit gun tip must be reduced, resulting in a decrease in the rate of generation of microdroplets.
- the ejector tip injection/ejection method is used, the outlet end of the ejector tip is moved relative to the oil phase composition by the motion control mechanism. In the process of using the traditional motion control mechanism, the relative movement between the outlet end of the ejection head and the oil phase composition cannot be precisely controlled, and the volume uniformity of the generated micro-droplets is poor.
- the outlet end of the spit gun head is in motion, and the flow rate of the discharged liquid is unstable and uncontrollable.
- the generated microdroplet volume size is random.
- the conventional ejector tip injection/spray method requires a squirting head to perform a liquid surface cutting motion to generate microdroplets.
- this method forms unstable standing waves on the liquid surface, and the formation process of the micro droplets is unstable.
- the surface characteristics of the spit gun tip are important factors influencing the formation of microdroplets.
- the cross-sectional dimensions of traditional spit tips are generally on the order of micrometers. Conventional surface treatment methods are often used for larger parts and are not fully suitable for smaller size spit tips.
- the present application provides a ejector tip for generating microdroplets, including a needle stem having a hollow cavity and an outlet end disposed at one end of the needle stem; an outlet end of the ejector head The angle between the normal of the end face and the extending direction of the needle stem is less than or equal to 90°.
- a micro-droplet generating device includes a fluid driving mechanism, a motion control mechanism, and a liquid discharging gun head according to the above aspect; the inside of the liquid discharging gun head stores a first liquid, and the liquid discharging gun head has an outlet end And an inlet end; the fluid drive mechanism is coupled to the inlet end of the ejector head for discharging the first liquid stored inside the squirt head from the outlet end of the squirt head;
- the motion control mechanism is configured to control the outlet end of the ejector head to generate a set trajectory or a set speed or a set acceleration under the liquid level of the second liquid, so as to discharge the outlet of the ejector head
- the first liquid at the end forms microdroplets in the second liquid against surface tension and adhesion.
- a method for producing a micro-droplet comprising the liquid-spraying gun head according to any one of the above aspects, wherein the first liquid is stored in the liquid-spraying gun head, and a micro-droplet container storing the second liquid is provided;
- the liquid is discharged at a constant speed from the outlet end of the ejector head; and the outlet end of the ejector head is controlled to perform a periodic wave motion with a square wave velocity along the extending direction of the needle stalk under the liquid surface of the second liquid
- the first half period and the second half period of the periodic movement of the outlet end of the spit gun head are the same as the speed of the outlet end of the spit gun head, and the direction is opposite; the first liquid and the second liquid are mutually incompatible Two liquids or two liquids with an interfacial reaction.
- a method for producing a micro-droplet comprising the liquid-spraying gun head according to any one of the above aspects, wherein the first liquid is stored in the liquid-spraying gun head, and a micro-droplet container storing the second liquid is provided;
- the liquid is discharged at a constant speed from the outlet end of the ejector head; the outlet end of the ejector head is controlled to perform a sinusoidal cyclic movement in the direction of the extension of the needle stem inside the second liquid; the first liquid
- the two liquids are arbitrarily incompatible with each other or two liquids having an interfacial reaction.
- the present application provides a motion control mechanism including a support frame, a connecting member, and a driving element.
- the connector is used to connect to the ejector tip.
- a drive element is fixed to the support frame, and the drive element is drivingly coupled to the connection piece. Under the driving of the driving element, the outlet end of the ejector head is subjected to a sinusoidal change in displacement or a square wave change in speed.
- the motion control mechanism has the advantages of a sinusoidal change in displacement or a square wave change in velocity at the outlet end of the ejection head to generate microdroplets, which has the advantages of high microdroplet generation efficiency and high homogeneity.
- the present application provides a fluid drive mechanism for a micro-droplet generation system, including a variable volume assembly and a power assembly.
- the variable volume assembly includes a syringe barrel and a push rod, the push rod is slidably engaged with an inner wall of the syringe barrel, wherein the syringe barrel can store a driving liquid, and the syringe barrel has an inlet and outlet port, and the inlet and outlet ports are used for An inlet end of the ejector head storing the first liquid is connected.
- a power assembly is coupled to the push rod for driving the push rod to slide in an extending direction of the syringe.
- the power assembly drives the push rod to squeeze the driving liquid stored in the syringe, and the driving liquid squeezes the first liquid stored in the jetting gun head, and then the first A liquid is discharged from the outlet end of the spit gun head.
- a fluid driving method comprising the fluid driving mechanism according to any one of the above aspects, wherein the fluid driving method comprises: the power component driving the push rod to press the driving liquid stored in the syringe, The driving liquid squeezes the first liquid stored in the ejection head, and the first liquid is discharged from an outlet end of the ejection head.
- a fluid driving method using the fluid driving mechanism of the above aspect comprising: the three-way switching valve communicating the inlet and outlet ports of the variable volume assembly with the liquid storage tank, Driven by the power assembly, the push rod slides within the syringe to change the volume of the syringe to draw the drive liquid in the reservoir into the syringe; a three-way reversing valve that communicates the inlet and outlet ports of the variable volume assembly with an inlet end of the ejector head, and the push rod slides within the syringe under the driving of the power assembly a volume of the syringe to discharge gas in the syringe and in the jetting head; an outlet end of the jetting head enters the first liquid and maintains the three-way reversing a valve that communicates the inlet and outlet ports of the variable volume assembly with an inlet end of the ejector head, and the push rod slides within the syringe to change the syringe under the driving of the power assembly
- the fluid driving mechanism and the fluid driving method utilize the incompressibility of the driving liquid to ensure that the outlet end of the ejection head can discharge the first liquid from the outlet end of the ejection head at a set flow rate when vibrating at a high frequency.
- the fluid drive mechanism provided by the present application is capable of precisely controlling the volume of generated microdroplets.
- the present application provides a method for generating a micro-droplet, comprising the steps of: S201, providing a ejector head having an outlet end, wherein the ejector head stores a first liquid; and providing a second liquid for storing a microdroplet container having an opening; the first liquid and the second liquid are two liquids that are mutually incompatible with each other or two liquids having an interface reaction; S202, an outlet of the spit gun head The end is inserted into the liquid surface of the second liquid by the opening of the micro-droplet container; S203, the outlet end of the ejector head is subjected to a movement including instantaneous acceleration under the liquid surface of the second liquid, and the first liquid is The outlet end of the ejector head is discharged, and the first liquid discharged from the outlet end of the ejector head forms a droplet attached to the outlet end of the ejector head, and the droplet is at the outlet of the ejector head During the instantaneous acceleration
- the acceleration value of the outlet end of the ejector head is instantaneously increased, and the droplet attached to the outlet end of the ejector head and the outlet end of the ejector head
- the adhesion is insufficient to accelerate the droplets to accelerate synchronously with the outlet end of the ejector head, and the droplets attached to the outlet end of the ejector head are separated from the outlet end of the ejector head in the second liquid
- Microdroplets are formed under the surface.
- the outlet end of the squirting gun head performs a motion including instantaneous acceleration under the liquid surface of the second liquid to generate micro-droplets, and the ejector head is reduced.
- the disturbance caused by the second liquid during the movement of the outlet end ensures the stability of the micro-droplet formation process.
- the present application provides a method for generating a micro-droplet, comprising the steps of: S211, providing a ejector head having an outlet end, wherein the ejector head stores a first liquid; and providing a second liquid for storing a microdroplet container having an opening; the first liquid and the second liquid are two liquids that are mutually incompatible with each other or two liquids having an interfacial reaction; S212, an outlet of the spit gun head The end is inserted into the liquid surface of the second liquid by the opening of the micro-droplet container; S213, the outlet end of the liquid-spraying gun head performs a periodic change of the speed under the second liquid level, and the speed changes.
- the velocity of the outlet end of the ejection head is monotonously changed, and the first liquid is discharged from the outlet end of the ejection head, and the outlet end of the ejection head is discharged.
- the first liquid forms a droplet attached to the outlet end of the ejector head, and the droplet detaches from the outlet end of the ejector head during the movement of the outlet end of the ejector head under the second liquid level Forming microdroplets.
- the outlet end of the spit gun head is subjected to a periodic change in velocity under the second liquid level, and the outlet end of the spit gun head is in the first half cycle and the second half cycle of the speed change.
- the speed varies monotonically.
- the viscous force of the second liquid to the droplet also changes periodically with the periodic change of the velocity of the outlet end of the ejection head.
- the droplet cannot move synchronously with the outlet end of the ejection head, and then adheres to the spit
- the droplets at the outlet end of the liquid lance head are separated from the outlet end of the ejector head to form microdroplets under the second liquid level.
- the outlet end of the ejector head is subjected to a shifting cycle under the liquid level of the second liquid to generate microdroplets, and the outlet end of the ejector head is reduced.
- the disturbance caused by the second liquid during the movement ensures the stability of the micro-droplet formation process.
- the present application provides a surface treatment method for a liquid discharge gun head for surface treatment of a liquid discharge gun head, comprising the following steps: S260, silicidating the liquid discharge gun head; S270, using coke Treating the spit gun head with an aqueous solution of diethyl carbonate; S280, drying the spit gun head.
- the surface treatment method of the spit gun head, the silanization treatment reduces the surface free energy of the spit gun head and controls the surface free energy of the spit gun head within a certain interval, thereby reducing the surface characteristics of the spit gun head to the micro droplets The impact of the build process.
- the present application provides a fluid drive mechanism for a micro-droplet generation system including a housing, a first variable volume assembly, and a linear motor assembly.
- the first variable volume assembly is disposed in the housing, the first variable volume assembly includes a first syringe and a first push rod, and the first push rod is in sliding engagement with an inner wall of the first syringe
- the first syringe can store a first driving liquid, and the first syringe has an inlet and outlet port for communicating with an inlet end of the first ejection head that stores the third liquid.
- the linear motor assembly is disposed in the housing, and an output end of the linear motor assembly is drivingly connected to the first push rod for driving the first push rod to slide along an extending direction of the first injection tube .
- a fluid driving method using the fluid driving mechanism comprising: the switching valve communicating the inlet and outlet ports of the first syringe with the liquid storage tank, Driven by the linear motor assembly, the first push rod slides within the first syringe to change the volume of the first syringe to draw the first driving liquid in the reservoir into the Inside the first syringe.
- the diverter valve communicates the inlet and outlet ports of the first syringe with the inlet end of the first jetting head, and the first push rod is driven by the linear motor assembly Sliding within the first syringe changes the volume of the first syringe to expel gas within the first syringe and within the first jetting head.
- the outlet end of the first ejector head enters the third liquid, and maintains the directional valve to make the inlet and outlet ports of the first syringe and the inlet of the first ejector head End communication, the first push rod sliding in the first syringe changes the volume of the first syringe to drive the third liquid into the first drainage liquid under the driving of the power component Inside the gun.
- the diverter valve communicates the inlet and outlet ports of the first syringe with the inlet end of the first jetting head, and the first push rod is driven by the linear motor assembly Sliding in the first syringe changes the volume of the first syringe to discharge the third liquid stored in the first squirting head to the first squirting head at a set flow rate
- the exit end The fluid driving mechanism and the fluid driving method utilize the incompressibility of the first driving liquid to ensure that the outlet end of the first ejection head can still discharge the third liquid from the first discharge at a set flow rate when vibrating at a high frequency. The outlet end of the tip is discharged.
- the linear motor assembly not only has high motion accuracy, but also can conveniently adjust the current according to the actual working conditions such as the discharge speed and the discharge pressure to ensure that the first push rod slides or slides the set distance according to the set speed, thereby realizing
- the third liquid is discharged from the outlet end of the first discharge head precisely at a set flow rate and flow rate.
- the fluid drive mechanism provided by the present application is capable of precisely controlling the volume of generated microdroplets.
- FIG. 1 is a schematic diagram of an overall structure of a digital PCR detector according to an embodiment of the present invention
- FIG. 2 is a micro-droplet generating apparatus for a digital PCR detector according to an embodiment of the present invention
- FIG. 4 is a schematic diagram of the velocity change of the outlet end of the squirting gun head according to an embodiment of the present invention
- FIG. 5 is a squirting gun provided by an embodiment of the present invention
- FIG. 6 is a schematic diagram of the force of the droplets during the movement of the outlet end of the squirting gun head according to another embodiment of the present invention
- FIG. 7 is a schematic diagram of the force of the droplets during the movement of the outlet end of the squirting gun head according to another embodiment of the present invention. Schematic diagram of the viscous resistance change when the droplet moves with the outlet end of the ejector head;
- FIG. 8 is a schematic view showing the process of generating a micro-droplet at two outlets of the discharge end of the squirting lance head according to an embodiment of the present application.
- FIG. 9 is a schematic diagram of a process of generating a micro-droplet in a movement cycle of the outlet end of the squirting gun head according to an embodiment of the present invention;
- FIG. 10 is a movement cycle of the outlet end of the squirting lance head according to an embodiment of the present application;
- FIG. 11 is a schematic view showing a process of generating micro droplets when a spit gun head is oscillated according to an embodiment of the present invention
- FIG. 12 is a viscosity change of a second liquid according to an embodiment of the present application
- FIG. 13 is a schematic diagram of a process of generating a microdroplet when replacing a spit gun head according to an embodiment of the present invention
- FIG. 14 is an outlet end of a spit gun head according to an embodiment of the present application
- FIG. 15 is a schematic diagram showing the change of the velocity of the outlet end of the ejection head according to another embodiment of the present invention
- FIG. 16 is a schematic diagram of the ejection tip of the ejection tip provided by another embodiment of the present application;
- FIG. 17 is a schematic structural view of an outlet end of a liquid discharge gun head according to another embodiment of the present invention
- FIG. 18 is a schematic structural view of a liquid discharge gun head according to an embodiment of the present application
- FIG. 20 is a schematic view showing a process of generating micro droplets in a spouting tip of a spun-cut structure according to an embodiment of the present invention
- FIG. 21 is a chamfer provided by another embodiment of the present application.
- Knot FIG. 22 is a schematic view showing a process of generating micro droplets in a spunlace head of a bent structure according to an embodiment of the present invention
- FIG. 23 is a bending diagram provided by another embodiment of the present application;
- FIG. 24 is a flow chart of a surface treatment method for a liquid discharge gun head according to an embodiment of the present invention
- FIG. 25 is a surface treatment of a liquid discharge gun head according to another embodiment of the present application
- FIG. 26 is a schematic diagram showing the connection between a fluid control mechanism and a squirting gun head according to an embodiment of the present invention
- FIG. 27 is a schematic structural diagram of a fluid control mechanism according to an embodiment of the present application
- FIG. 29 is a schematic structural diagram of a fluid control mechanism according to another embodiment of the present application;
- FIG. 30 is a schematic structural view of a motion control mechanism according to an embodiment of the present application
- Figure 31 is a schematic diagram showing the control of a closed-loop control motor according to an embodiment of the present invention
- Figure 32 is a schematic structural view of a piezoelectric motion control mechanism according to an embodiment of the present application
- FIG. 34 is a schematic structural diagram of an electromagnetic-elastic-type motion control mechanism according to another embodiment of the present application
- FIG. 35 is a schematic diagram of an electromagnetic-elastic-type motion control mechanism according to another embodiment of the present application
- - FIG. 36 is a schematic structural view of an electromagnetic-bearing type motion control mechanism according to another embodiment of the present application
- FIG. 37 is a schematic structural view of an electromagnetic-bearing type motion control mechanism according to still another embodiment of the present application.
- Figure 38 is a side elevational view of the overall structure of the fluid drive mechanism according to an embodiment of the present invention;
- Figure 39 is a first side view showing a portion of the structure of the fluid drive mechanism according to an embodiment of the present application;
- Figure 4 is a front elevational view showing a portion of a structure of a fluid drive mechanism according to an embodiment of the present invention;
- Figure 42 is a second side elevational view showing a portion of a structure of a fluid drive mechanism according to an embodiment of the present application;
- 43 is a schematic exploded view showing the assembly of a fluid drive mechanism according to an embodiment of the present invention;
- FIG. 45 is a schematic exploded view showing the assembly of the voice coil motor and the connecting plate structure according to an embodiment of the present invention
- FIG. 46 is a schematic diagram of the assembly explosion of the voice coil motor and the connecting plate structure according to an embodiment of the present application
- FIG. 47 is a second side elevational view of the integrally formed skeleton and the connecting plate according to an embodiment of the present invention
- FIG. 48 is a cross-sectional view of the integrally formed skeleton and the connecting plate according to an embodiment of the present invention
- FIG. 49 is a schematic cross-sectional view of a reversing valve according to an embodiment of the present invention
- FIG. 50 is a schematic diagram of a fluid driving method according to an embodiment of the present application.
- the present application provides a digital PCR detector 1 including: a micro-droplet generating device 10 , a temperature control device 20 , a fluorescent signal detecting device 30 , and a quantitative The analysis device 40 and the controller 50 are provided.
- the microdroplet generating device 10 is configured to microdroplet a nucleic acid amplification reaction solution to form a plurality of microdroplets.
- the temperature control device 20 and the micro-droplet generating device 10 are connected by a track for transferring the plurality of micro-droplets to the temperature control device 20 to perform temperature cycling to realize nucleic acid amplification.
- the fluorescence signal detecting device 30 is disposed opposite to the temperature control device 20 for performing photo detection on the plurality of micro droplets after nucleic acid amplification.
- the quantitative analysis device 40 and the fluorescent signal detecting device 30 are connected by a data line for realizing the transmission of the plurality of micro-droplet fluorescence information for quantitative analysis.
- the controller 50 is connected to the micro-droplet generating device 10, the temperature control device 20, the fluorescent signal detecting device 30, and the quantitative analyzing device 40, respectively, for controlling the micro-droplet generating device 10, the temperature The control device 20, the fluorescence signal detecting device 30, and the quantitative analysis device 40.
- the digital PCR detector 1 can integrate the micro-droplet generating device 10, the temperature control device 20, the fluorescent signal detecting device 30, and the quantitative analyzing device 40, thereby enabling an operator to perform an automatic operation. .
- the digital PCR detector 1 has a high working efficiency.
- the microdroplet generating device 10 may microdrop the nucleic acid amplification reaction solution to be formed to form a plurality of microdroplets.
- the temperature control device 20 can perform nucleic acid amplification on the plurality of microdroplets.
- the fluorescent signal detecting device 30 captures a fluorescence change picture of the plurality of micro-droplets in real time.
- a fluorescence change curve of the plurality of microdroplets can be obtained by a fluorescence change picture of the plurality of microdroplets.
- the Ct value of the plurality of microdroplets can be obtained, and the concentration of the initial DNA is quantitatively analyzed by the relationship between the Ct value and the initial copy number.
- the Ct value refers to the number of cycles experienced when the fluorescence signal of each microdroplet reaches a set threshold.
- the temperature control device 20 performs a nucleic acid amplification reaction on the plurality of micro droplets, and collects, by the fluorescence signal detecting device 30, product signals of the plurality of micro droplets after the nucleic acid amplification reaction, such as fluorescence, UV absorption, turbidity and other signals. Utilizing the difference in composition between the plurality of amplified and non-amplified microdroplets, the number of droplets obtained by obtaining the target sequence is analyzed, and finally quantitative analysis of the nucleic acid molecule is realized. By monitoring the fluorescence change pictures of the plurality of micro-droplets in real time, the detection result is direct, and the problem of false positives and false negatives among the plurality of micro-droplets can be solved.
- the digital PCR detector 1 integrates the micro-droplet generating device 10, the temperature control device 20, the fluorescent signal detecting device 30, and the quantitative analyzing device 40, so that the operator can realize automatic operation It does not improve the work efficiency, but also has the advantages of rapid response, good repeatability, high sensitivity, specificity and clear results.
- microfluidic operation is to further split the microliters of liquid into droplets of nanoliter or even picoliter volume as a microreaction system.
- microreaction system generation is the formation of emulsified microdroplets.
- microdroplet formation techniques have been reported in the literature, such as membrane emulsification, spray emulsification, microfluidic chip methods, and spit gun injection/ejection.
- the method of generating emulsified microdroplets by the ejector tip has its own disadvantages in practical applications.
- Some methods use the interfacial energy and fluid shear force of the trace liquid in the gas-liquid phase interface to overcome the surface tension and adhesion of the liquid at the outlet of the spit gun head, so that the droplets flowing out of the nozzle of the spit nozzle can be smoothly
- the ground is separated from the spit head and a droplet of controlled size is formed in the non-phase solution.
- this method requires the cutting movement of the ejection head at the liquid surface, and the high-precision positioning of the starting and ending positions of the ejection head relative to the liquid surface is required, which is difficult in engineering implementation.
- the surface of the liquid phase is liable to form unstable standing waves during the repeated rapid ingress and egress of the liquid phase, which limits the rate of formation of the microdroplets.
- Still other methods form a droplet by cutting the injected phase-in-phase solution by a shearing force generated by a spun gun head in a circumference of the liquid or a uniform motion of the spiral.
- this method produces errors due to the influence of various system factors (such as the viscosity of the liquid, the temperature of the liquid, the speed of movement, the trajectory of the movement, etc.) due to the size of the droplets generated by the ejector tip. Moreover, this error accumulates as the number of generated droplets increases, and thus it is difficult to control the uniformity of volume size generated by large-volume droplets.
- micro-droplet generation method and device in the process of generating micro-droplets, the micro-droplet generation rate is slow, and the micro-droplet volume size uniformity is difficult to control.
- a method and apparatus for generating microdroplets with rapid droplet formation and high volume uniformity is necessary to provide.
- the micro-droplet generating device 10 includes a ejector head 110, a fluid drive mechanism 120, a motion control mechanism 130, and a first controller 170.
- the ejector tip 110 has an outlet end and an inlet end and is used to store the first liquid.
- the microdroplet generating device 10 can be used in conjunction with a microdroplet container. A second liquid is stored in the microdroplet container, and an outlet end of the ejector tip 110 is inserted under the surface of the second liquid.
- the first liquid and the second liquid are mutually incompatible or have an interfacial reaction.
- the first liquid and the second liquid may be any two liquids which are immiscible.
- the first liquid is an aqueous solution
- the second liquid is an oily liquid that is immiscible with water, such as minerals. Oil (including n-tetradecane, etc.), vegetable oil, silicone oil, and perfluoroalkane oil, etc.
- the resulting droplets are aqueous droplets.
- the first liquid is a mineral oil such as an organic phase such as tetradecane and n-hexane
- the second liquid is a perfluoroalkane oil which is immiscible with mineral oil.
- the first liquid and the second liquid may be immiscible aqueous two phases.
- the first liquid is an aqueous solution
- the second liquid is an aqueous liquid that is immiscible with water.
- the first liquid is a dextran solution
- the second liquid is a polyethylene glycol (PEG) aqueous solution
- the generated droplets are droplets of a dextran solution.
- the first liquid and the second liquid may also be two liquids having an interfacial reaction.
- the first liquid is an aqueous solution of sodium alginate
- the second liquid is an aqueous solution of calcium oxide.
- an aqueous calcium oxide solution having a mass concentration of 1% has an interfacial reaction
- the resulting droplets are calcium alginate gel microspheres.
- the application can also form a plurality of droplets of different components and volumes in the open container by replacing the components of the first liquid flowing out of the spit gun head or the spit gun head, which can be used for realizing large quantities.
- Micro-volume high-throughput screening can also achieve multi-step ultra-micro biochemical reactions and detection, and has broad application prospects.
- the fluid drive mechanism 120 is coupled to the inlet end of the ejector head 110 for discharging the first liquid stored inside the squirt head 110 from the outlet end of the squirt head 110 .
- the motion control mechanism 130 is configured to control a relative movement between the outlet end of the ejector head 110 and the second liquid to generate a set trajectory or set a speed or set an acceleration, so as to discharge the sputum.
- the first liquid at the outlet end of the tip 110 overcomes the surface tension and the adhesion of the ejector tip 110 thereto to form microdroplets.
- the first controller 170 is connected to the fluid drive mechanism 120 and the motion control mechanism 130, respectively, for controlling the fluid drive mechanism 120 and the motion control mechanism 130 to work in coordination.
- Microdroplet generation techniques have been reported in the literature, such as membrane emulsification, spray emulsification, microfluidic chip, and spit-injection/ejection.
- the spit gun head injection/ejection method as the latest micro-droplet generation technology, has a good application prospect in the generation of micro-droplets and the control of consumable cost.
- the conventional ejector tip injection/spray method requires a squirting head to perform a liquid surface cutting motion to generate microdroplets.
- this method forms unstable standing waves on the liquid surface, and the formation process of the micro droplets is unstable.
- the outlet end 112 of the ejector head 110 can perform a motion including instantaneous acceleration under the second liquid level, and the acceleration is a 1 .
- the first liquid is discharged from the outlet end 112 of the ejector head 110 to form a droplet 195 attached to the outlet end 112 of the squirt head 110.
- the droplet 195 exits the outlet end 112 of the ejector tip 110 at the instant of instantaneous acceleration of the outlet end 112 of the ejector tip 110 to form microdroplets.
- the forces applied by the microdroplets before exiting the outlet end 112 of the ejector tip 110 are gravity G, the buoyancy f 1 of the second liquid, the viscous resistance f 2 of the second liquid, and the ejector tip 110
- Micro-droplets in the mass exit from the extruding liquid tip 110 before end 112 is m, is a magnitude of the acceleration a 2. According to Newton’s second law of motion,
- the viscous resistance f 2 6 ⁇ rv received by the droplet 195 as it moves in the second liquid, where ⁇ is the viscosity coefficient of the second liquid and r is the radius of the droplet 195 , v is the speed of movement of the droplet 195.
- the velocity of the droplet 195 is zero before the instantaneous end of the ejection tip 110 is instantaneously accelerated, so that the droplet 195 is viscous in the second liquid at the moment the tip end 112 of the ejection tip 110 is instantaneously accelerated.
- f 2 is zero or very small.
- the droplet diameter typically in the range of pi to 195 microliters of magnitude, and opposite to gravity and buoyancy G droplets 195 f 1 of the second liquid direction, the droplets of gravity G 195
- the vector sum with the buoyancy f 1 of the second liquid is about zero. Since the viscous resistance f 2 is zero or very small, and the vector sum of gravity G and buoyancy f 1 is about zero, It can be known from Newton's second law of motion that the maximum acceleration that the droplet 195 can reach in the second liquid is a 2 ⁇ f 3 /m, where m is the droplet when the outlet end 112 of the ejector tip 110 is subjected to the instantaneous acceleration motion. The quality of 195.
- the droplet 195 falls from the outlet end 112 of the ejector tip 110 to form a microdroplet.
- the condition under which the droplet 195 exits the outlet end 112 of the ejector tip 110 i.e., produces a microdroplet
- a 2 ⁇ (f 3 /m) ⁇ a 1 is approximately: a 2 ⁇ (f 3 /m) ⁇ a 1 .
- the motion control mechanism 130 is capable of accurately controlling the magnitude of the instantaneous acceleration of the outlet end 112 of the ejector head 110. Therefore, by controlling the outlet end 112 of the ejector head 110 to have a large value of the instantaneous acceleration, the outlet end 112 of the ejector head 110 is instantaneously accelerated to generate the droplet 195 efficiently.
- micro-droplet generation method comprising the following steps:
- the outlet end 112 of the ejector head 110 performs a motion including instantaneous acceleration under the second liquid level, while the first liquid is discharged from the outlet end 112 of the ejector head 110, and the outlet end of the ejector head 110 is discharged.
- the first liquid of 112 forms a droplet 195 attached to the outlet end 112 of the ejector tip 110, and the droplet 195 exits the outlet end of the squirt head 110 during the instantaneous acceleration movement of the outlet end 112 of the ejector tip 110.
- 112 forms microdroplets under the second liquid level.
- the droplet 195 attached to the outlet end 112 of the ejector head 110 and the sputum
- the adhesion between the outlet ends 112 of the tips 110 is insufficient to cause the droplets 195 to accelerate in synchronism with the outlet end 112 of the ejector tip 110 such that the fluid adheres to the outlet end 112 of the ejector tip 110
- the drop 195 is detached from the outlet end 112 of the ejector tip 110 to form microdroplets under the second liquid level.
- the outlet end 112 of the ejector head 110 generates micro-droplets during the instantaneous acceleration movement under the liquid surface of the second liquid, and the ejector tip 110 is reduced.
- the disturbance of the second liquid caused by the movement of the outlet end 112 ensures the stability of the micro-droplet generation process.
- the manner in which the first liquid is discharged from the outlet end 112 of the ejector head 110 may be continuous discharge or discontinuous discharge.
- the specific discharge method can be designed according to the actual working conditions.
- the first liquid is continuously discharged from the outlet end 112 of the ejector head 110 to fully utilize the instantaneous acceleration of the outlet end 112 of the ejector head 110 to generate microdroplets.
- the first liquid is discharged by the outlet end 112 of the ejector head 110 at a constant flow rate, that is, at an equal time interval, the outlet end 112 of the ejector head 110 is discharged.
- the first liquid volume is always equal.
- the first liquid is discharged by the outlet end 112 of the ejector tip 110 at a constant flow rate, facilitating control of microdroplet generation by controlling the movement of the outlet end 112 of the ejector head 110.
- the outlet end 112 of the ejector head 110 performs a periodic motion including instantaneous acceleration under the second liquid level.
- the outlet end 112 of the ejector tip 110 is periodically moved under the second liquid level, meaning that the displacement, velocity and acceleration of the outlet end 112 of the ejector tip 110 exhibit periodic changes.
- the outlet end 112 of the ejector tip 110 performs a periodic motion including a momentary acceleration motion, and the first liquid is discharged from the outlet end 112 of the ejector head 110 at a constant flow rate to effect equal time interval generation of the microdroplets.
- the flow rate of the outlet end 112 of the first liquid discharge jetting head 110 is varied, but during a period of motion of the outlet end 112 of the jetting head 110, the first liquid exits the outlet end 112 of the jetting head 110.
- the volume remains the same. This ensures that the volume of the droplets 195 is the same each time the outlet end 112 of the ejection tip 110 is instantaneously accelerated to generate microdroplets of uniform size.
- the surface free energy of the ejector head 110, the geometry of the ejector head 110, and the surface tension of the droplet 195 act as an outlet affecting the ejector head 110 without replacing the ejector tip 110 and the first liquid. factors maximal adhesive force f between two ends 112 and 195 is determined by the droplet. Thus, without replacing the tip 110 and the liquid discharge of the first liquid, the liquid discharge outlet tip end 110 of the maximum adhesion between the droplet 112 f 3 of 195 it is fixed. Driven by the fluid drive mechanism 120, the first liquid is capable of continuously discharging the outlet end 112 of the ejector head 110 at a uniform flow rate.
- the motion control mechanism 130 can precisely control the timing at which the exit end 112 of the ejector tip 110 makes the instantaneous acceleration a 1 and the magnitude of the instantaneous acceleration a 1 .
- Fluid drive mechanism 120 and the motion control mechanism 130 cooperate with each other can be easily achieved when the volume of the droplet 195 reaches a fixed value of the moment, the outlet tip 110 of the liquid discharge drive end 112 generates acceleration instantaneous acceleration a 1 to generate the size of the volume Consistent microdroplets.
- the fluid drive mechanism 120 controls the first liquid to uniformly and continuously discharge the outlet end 112 of the ejector tip 110
- only the motion control mechanism 130 drives the outlet end 112 of the ejector tip 110 to produce an instantaneous acceleration movement at equal intervals, i.e., Microdroplets of uniform size can be generated.
- the surface free energy of the ejector tip 110 and the geometry of the ejector tip 110 act as an outlet end 112 and fluid that affect the ejector tip 110.
- the two factors of maximum adhesion f 3 between drops 195 are varied.
- batch processing can control the surface free energy of the ejector tip 110 and the geometry of the ejector tip 110 to vary within a certain interval.
- the surface tension of the droplet 195 as another factor affecting the maximum adhesion force f 3 between the outlet end 112 of the ejection head 110 and the droplet 195 also varies only in a small range.
- the fluid drive mechanism 120 is capable of driving the first liquid to continuously discharge the outlet end 112 of the ejector head 110 at a uniform flow rate.
- the motion control mechanism 130 can precisely control the timing at which the exit end 112 of the ejector tip 110 makes the instantaneous acceleration a 1 and the magnitude of the instantaneous acceleration a 1 .
- Fluid drive mechanism 120 and the motion control mechanism 130 cooperate with each other can be easily achieved when the volume of the droplet 195 reaches a fixed value of the moment, the outlet tip 110 of the liquid discharge drive end 112 generates acceleration instantaneous acceleration a 1 to generate the size of the volume Consistent microdroplets. If the fluid drive mechanism 120 controls the first liquid to uniformly and continuously discharge the outlet end 112 of the ejector tip 110, only the motion control mechanism 130 drives the outlet end 112 of the ejector tip 110 to produce an instantaneous acceleration movement at equal intervals, i.e., Microdroplets of uniform size can be generated.
- the fluid drive mechanism 120 when the first liquid is uniformly discharged from the outlet end 112 of the ejector head 110, cooperates with the motion control mechanism 130 to perform an instantaneous acceleration motion with a large acceleration value at the moment when the volume of the droplet 195 reaches a set value.
- the micro-droplet generation method provided by the present application not only ensures that the same ejector tip 110 is used to generate the droplet 195 having a uniform size, and at the same time, the volume of the droplets simultaneously or sequentially generated by the plurality of ejector tips 110 can be ensured. Uniformity.
- the micro-droplet generation method provided by the embodiment can ensure the generation efficiency of the micro-droplets by simultaneously generating the micro-droplets by the plurality of ejector tips 110 while ensuring the uniformity of the volume of the micro-droplets.
- the outlet end 112 of the ejector head 110 includes multiple instantaneous acceleration motions in a periodic motion, and the accelerations of the multiple instantaneous acceleration motions are the same, and multiple instantaneous acceleration motions The moments are equally divided into one cycle of motion of the outlet end 112 of the jetting tip 110.
- the exit end 112 of the ejector tip 110 includes a plurality of transient acceleration motions within a periodic motion to assist in generating a plurality of microdroplets during an exercise cycle at the outlet end 112 of the ejector tip 110.
- the movement trajectory of the outlet end 112 of the ejector head 110 under the second liquid level includes a combination of one or more of a plurality of trajectories such as a straight line segment, a circular arc segment, and a polygon.
- a plurality of trajectories such as a straight line segment, a circular arc segment, and a polygon.
- the outlet end 112 of the ejector tip 110 When the outlet end 112 of the ejector tip 110 includes more than two instantaneous acceleration movements in a periodic motion, the outlet end 112 of the ejector tip 110 is traversed into a regular polygon in the second liquid, including an equilateral triangle, Square, regular pentagon, regular hexagon, etc.
- step S203 during the periodic movement of the outlet end 112 of the ejector head 110 under the second liquid level, the velocity of the outlet end 112 of the ejector head 110 is a rectangular wave. Variety.
- the velocity of the outlet end 112 of the ejector tip 110 changes in a rectangular wave.
- the velocity is entered into a uniform phase, which facilitates the motion control mechanism 130 to achieve precise control of the motion state of the outlet end 112 of the ejector tip 110.
- the high-order time and the low-order time of the rectangular wave indicating the change in the moving speed of the outlet end 112 of the ejector tip 110 may be equal or different.
- step S203 during the periodic movement of the outlet end 112 of the ejector head 110 under the second liquid level, the velocity of the outlet end 112 of the ejector head 110 changes in a square wave.
- the high-order time and the low-order time of the rectangular wave indicating the change in the moving speed of the outlet end 112 of the ejector head 110 are equal.
- the velocity of the outlet end 112 of the ejection head 110 is zero or has a velocity in the opposite direction with respect to the high position. As shown in FIG.
- the trajectory of the outlet end 112 of the ejector head 110 under the second liquid level is a straight line segment, and the outlet end 112 of the ejector head 110 is instantaneously accelerated from one end of the straight section.
- the other end of the straight line segment performs the instantaneous acceleration motion in the opposite direction.
- the acceleration of the two instantaneous acceleration motions is a 1 .
- the trajectory of the outlet end 112 of the ejector tip 110 below the second liquid level is a circular arc segment or a polygon.
- the frequency at which the outlet end 112 of the ejector head 110 periodically moves under the second liquid level is between 0.1 Hz and 200 Hz, which is easy to implement in engineering.
- the fluid drive mechanism 120 controls the first liquid to exit the outlet end 112 of the ejector head 110 at a constant flow rate.
- the motion control mechanism 130 controls the output end of the ejector head 110 to perform a periodic motion in which the motion trajectory is a straight line and the speed is a square wave.
- the speed direction of the outlet end 112 of the ejector head 110 is changed, the instantaneous acceleration of the outlet end 112 of the ejector head 110 reaches a maximum value.
- the droplet 195 attached to the outlet end 112 of the ejector tip 110 also exits the outlet end 112 of the ejector tip 110 when the instantaneous acceleration of the outlet end 112 of the ejector tip 110 reaches a maximum to form microdroplets 199. Since the first liquid is discharged at the outlet end 112 of the ejector head 110 at a constant flow rate, when the droplet 195 is detached from the outlet end 112 of the ejector head 110, the new droplet 195 enters the generated state. When the outlet end 112 of the ejector tip 110 is again accelerated in the reverse direction, the newly generated droplet 195 also falls from the outlet end 112 of the ejector tip 110 to form a new droplet 199.
- two micro-droplets 199 can be generated in one motion cycle of the outlet end 112 of the ejector head 110, and the square wave is relatively easy to implement in engineering.
- a droplet 199 is created during one cycle of the outlet end 112 of the ejector tip 110.
- the outlet end 112 of the ejector head 110 performs a square wave motion of the trajectory in any direction in the second liquid 699, including: a plane perpendicular to the direction in which the squirting head 110 extends.
- the square wave motion in which the trajectory is a straight line the square wave motion in which the trajectory is a straight line in a plane at an arbitrary angle with the extending direction of the ejector head 110, and the trajectory in a straight line along the extending direction of the ejector head 110 Wave movements, etc.
- the trajectory of the outlet end 112 of the ejector head 110 is a circular arc segment or a polygon
- the outlet end 112 of the ejector tip 110 is traversed in any direction in the second liquid 699.
- the linear square wave motion includes: performing a square wave motion in which a trajectory is a straight line in a plane perpendicular to the extending direction of the ejector head 110, and making a trajectory in a plane at an arbitrary angle to the extending direction of the ejector head 110
- the square wave motion of the straight line, the square wave motion in which the trajectory is a straight line along the extending direction of the ejector head 110 is performed by performing a square wave motion in which a trajectory is a straight line in a plane perpendicular to the extending direction of the ejector head 110, and making a trajectory in a plane at an arbitrary angle to the extending direction of the ejector head 110.
- the outlet end 112 of the ejector head 110 under the driving of the motion control mechanism 130, the outlet end 112 of the ejector head 110 is subjected to a periodic change in velocity under the second liquid level, in the first half of the change in speed. During the latter half of the cycle, the velocity of the outlet end 112 of the ejector tip 110 varies monotonically.
- the monotonous change means that the velocity value at the rear end of the outlet end 112 of the ejector tip 110 is always greater than or equal to or less than the velocity value at the previous moment during the first half cycle or the second half cycle of the change in the speed magnitude.
- the velocity of the outlet end 112 of the ejector tip 110 continues to increase or the segment continues to increase while the segment remains unchanged.
- the velocity of the outlet end 112 of the ejector tip 110 continues to decrease or the segment continues to decrease while the segment remains unchanged.
- the first liquid is discharged from the outlet end 112 of the ejector head 110 to form a droplet 195 attached to the outlet end 112 of the squirt head 110.
- the droplet 195 exits the outlet end 112 of the ejector tip 110 to form microdroplets 199 as the speed of movement of the outlet end 112 of the ejector tip 110 reaches a certain level.
- the forces received by the microdroplets 199 before exiting the outlet end 112 of the ejector tip 110 are gravity G, the buoyancy f 1 of the second liquid 699, and the viscous resistance of the second liquid 699, respectively.
- Mass microdroplets outlet 199 from the liquid discharge end 112 of the tip 110 before is m, speed v, acceleration a 2.
- the droplet 195 is subjected to the combined action of the viscous force f 2 , the gravity G, the buoyancy f 1 and the adhesion force f 3 during the movement of the second liquid 699, ie
- the free energy, the surface tension of the droplet 195, and the geometry of the ejector tip 110 are related.
- the droplet 195 attached to the outlet end 112 of the ejector tip 110 is simplified into a spherical shape.
- the viscous resistance f 2 6 ⁇ rv received by the droplet 195 as it moves in the second liquid 699, where ⁇ is the viscosity coefficient of the second liquid 699 and r is the droplet 195 The radius, v is the speed of movement of the droplet 195.
- the diameter of the droplets 195 generally ranges from aspirated to microliters, while the viscosity of the second liquid 699 is generally relatively large.
- the droplet 195 is detached from the outlet end 112 of the ejector tip 110 (i.e., a microdroplet 199 is formed).
- the outlet end 112 of the ejection head 110 is inserted into the liquid surface of the second liquid 699 by the opening of the microdroplet container 60;
- the outlet end 112 of the ejector head 110 is subjected to a periodic change in velocity under the liquid level of the second liquid 699.
- the outlet end 112 of the ejector head 110 is in the first half cycle and the second half cycle of the change in velocity.
- the magnitude of the velocity varies monotonically, while the first liquid is uniformly discharged from the outlet end 112 of the ejector tip 110, and the first liquid exiting the outlet end 112 of the ejector tip 110 is formed to adhere to the outlet end 112 of the ejector tip 110.
- the droplet 195, the droplet 195 exits the outlet end 112 of the ejector tip 110 during the movement of the outlet end 112 of the ejector tip 110 to form a microdroplet 199 under the surface of the second liquid 699.
- the outlet end 112 of the ejector head 110 is subjected to a periodic change in velocity under the liquid level of the second liquid 699, and the ejector tip is in the first half cycle and the second half cycle of the change in the speed.
- the velocity of the exit end 112 of 110 is monotonically varied.
- the viscous force f 2 of the second liquid 699 to the droplet 195 also exhibits a periodic change with the periodic variation of the velocity of the outlet end 112 of the ejector tip 110.
- the outlet end 112 of the ejector head 110 performs a shifting cycle under the liquid level of the second liquid 699 to generate micro-droplets 199, which reduces the squirting gun.
- the disturbance to the second liquid 699 as the exit end 112 of the head 110 moves ensures the stability of the microdroplet 199 generation process.
- step S213 the first liquid is continuously discharged from the outlet end 112 of the ejector head 110. Further, in step S213, the first liquid is discharged by the outlet end 112 of the ejector head 110 at a constant flow rate, that is, the first liquid volume of the outlet end 112 of the ejector head 110 is discharged at equal time intervals. Always equal. The first liquid is expelled from the outlet end 112 of the ejector tip 110 at a constant flow rate, facilitating the generation of micro-droplets 199 of uniform size by controlling the periodic movement of the outlet end 112 of the ejector tip 110.
- the velocity v of the droplet 195 is relatively easy to control.
- the droplet 195 maintains a synchronized motion with the outlet end 112 of the ejector tip 110 prior to exiting the outlet end 112 of the ejector tip 110 to form the microdroplets 199. Therefore, the moving speed v of the liquid droplet 195 can be accurately controlled by controlling the moving speed of the outlet end 112 of the ejector head 110.
- the first liquid is controlled to exit the outlet end 112 of the ejector tip 110 at a uniform flow rate, and the magnitude r of the radius of the droplet 195 also exhibits a periodic change over a fixed time interval.
- the viscosity coefficient ⁇ of the second liquid 699 may vary within a certain range during use, but the second liquid 699 The range of variation of the viscosity coefficient ⁇ is small.
- the surface free energy of the ejector head 110, the geometry of the ejector head 110, and the surface tension of the droplet 195 act as an outlet affecting the ejector head 110 without replacing the ejector tip 110 and the first liquid. factors maximal adhesive force f between two ends 112 and 195 is determined by the droplet. Thus, without replacing the tip 110 and the liquid discharge of the first liquid, the liquid discharge outlet tip end 110 of the maximum adhesion between the droplet 112 f 3 of 195 it is fixed.
- the surface free energy of the ejector tip 110 and the geometry of the ejector tip 110 act as an outlet end 112 that affects the ejector tip 110.
- the two factors of maximum adhesion f 3 between droplets 195 are varied.
- batch processing can control the surface free energy of the ejector tip 110 and the geometry of the ejector tip 110 to vary within a certain interval.
- the surface tension of the droplet 195 as another factor affecting the maximum adhesion force f 3 between the outlet end 112 of the ejection head 110 and the droplet 195 also varies only in a small range. Extruding liquid tip outlet end 110 of the fluctuations in the three small interval maximum value f adhesion between the droplet 112 and 195.
- the viscous resistance f 2 that the droplet 195 is subjected to when moving in the second liquid 699 is greater than the interval value of the maximum value f 3 of the adhesion between the outlet end 112 of the ejector head 110 and the droplet 195.
- the size r of the radius of the droplet 195 should be fixed during the process of generating the microdroplets 199 in the same batch. Once the experimental parameters are determined, the magnitude r of the radius of the droplet 195 is also determined. The speed of movement of the outlet end 112 of the ejector tip 110 below the level of the second liquid 699 varies.
- the outlet end 112 of the ejector tip 110 performs a periodic change in velocity at the level of the second liquid 699.
- the first liquid is controlled to be discharged from the outlet end 112 of the ejector head 110 at a uniform flow rate, and the volume of the droplet 195 attached to the outlet end 112 of the ejector head 110 is also uniformly increased.
- the radius of the microdroplet 199 is referred to as the critical radius and the velocity of the microdroplet 199 becomes the critical velocity.
- the droplets 195 attached to the outlet end 112 of the ejector tip 110 simultaneously reach a critical radius and critical velocity, and new droplets 199 are formed. Since the first liquid is discharged at the outlet end 112 of the ejector head 110 at a uniform flow rate, the volume of the generated microdroplets 199 is the same.
- step S213 the velocity of the outlet end 112 of the ejector head 110 is center-symmetric with the intermediate point in time during a speed change period. Further, in step S213, the acceleration, velocity, and motion trajectory of the outlet end 112 of the ejector tip 110 under the liquid level of the second liquid 699 are periodically changed. Further, in step S213, the velocity of the outlet end 112 of the discharge gun head 110 under the liquid level of the second liquid 699 changes cosine.
- the movement trajectory of the outlet end 112 of the ejector head 110 under the liquid surface of the second liquid 699 includes one or more of a plurality of trajectories such as a straight line segment, a circular arc segment, and a polygon. combination.
- the frequency at which the outlet end 112 of the ejector head 110 periodically moves under the liquid level of the second liquid 699 is between 0.1 Hz and 200 Hz, which is easily accomplished in engineering.
- the outlet end 112 of the ejector head 110 is actually oscillating.
- the motion displacement can be represented by a sinusoid, as shown by curve a in FIG.
- the first liquid is discharged from the outlet end 112 of the ejector head 110 at a uniform flow rate by the fluid control mechanism. It is assumed that the drop 195 does not exit the outlet end 112 of the ejector tip 110.
- the viscosity resistance f viscosity experienced by the droplet 195 as it moves in the second liquid 699 changes with time as shown by the curve b in FIG.
- the radius r of the droplet 195 increases significantly.
- a uniform increase in the volume of the droplet 195 can only cause a slow increase in the radius r of the droplet 195.
- the maximum value of the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 increases rapidly, and then gradually increases slowly. . 7, the liquid droplets 195 moving in the second viscous resistance by 699 f 2 also presents a similar solution discharge outlet tip 110 of the end 112 of the periodic motion periodically, i.e. droplets 195
- the viscous resistance f 2 experienced when moving in the second liquid 699 varies with the speed of the outlet end 112 of the ejector head 110.
- the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 increases and is greater than the maximum adhesion between the outlet end 112 of the ejector tip 110 and the droplet 195.
- f 3 the discharge liquid droplet 195 from the outlet end 112 of tip 110 is formed microdroplets 199 off.
- the outlet end 112 of the ejector head 110 is controlled to be a circular arc, and the displacement is sinusoidally varied.
- the liquid discharge outlet tip end 110 of the maximum adhesion between the droplet 112 f 3 of 195 is fixed.
- the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 also increases.
- the viscous resistance f 2 of the droplet 195 as it moves in the second liquid 699 is greater than the instant of the maximum value f 3 of the adhesion between the outlet end 112 of the squirt head 110 and the droplet 195, and the droplet 195 is spit from The outlet end 112 of the liquid gun head 110 is detached to form microdroplets 199, which are droplets I in FIG. Entering the generation cycle of the next round of microdroplets 199.
- a first microdroplet 199 is produced at the end of the second cycle of the oscillating motion of the sinusoidal variation of the displacement end 112 of the ejector tip 110, which is the droplet I in FIG.
- the radius of the droplet 195 attached to the outlet end 112 of the squirt head 110 is The increase is faster, and the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 does not decrease immediately but presents a small increase. Thereafter, the radius r of the droplet 195 is slowly increased, and the viscous resistance f 2 received by the droplet 195 as it moves in the second liquid 699 mainly changes with the speed of movement of the outlet end 112 of the ejector head 110.
- the outlet end 112 of the ejector tip 110 is again generated with the previous one at the time of the two movement cycles after the generation of the last droplet 199.
- the microdroplet 199 is an equal volume of new droplet 195, which is droplet II in FIG.
- the moving speed of the outlet end 112 of the ejection head 110 is also the same as that before the two motion periods.
- a new volume 195 of equal volume with the last microdroplet 199 is detached from the outlet end 112 of the ejector tip 110.
- the outlet end 112 of the ejector head 110 is controlled to be a circular arc with a sinusoidal variation in displacement.
- the liquid discharge outlet tip end 110 of the maximum adhesion between the droplet 112 f 3 of 195 is fixed.
- the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 also increases.
- the viscous resistance f 2 of the droplet 195 as it moves in the second liquid 699 is greater than the instant of the maximum value f 3 of the adhesion between the outlet end 112 of the squirt head 110 and the droplet 195, and the droplet 195 is spit from The outlet end 112 of the liquid gun head 110 is detached to form microdroplets 199. Entering the generation cycle of the next round of microdroplets 199.
- a first microdroplet 199 is produced at the end of the first cycle of the oscillating motion of the sinusoidal shift of the outlet end 112 of the ejector tip 110, which is droplet I in FIG.
- the radius of the droplet 195 attached to the outlet end 112 of the squirt head 110 is The increase is faster, and the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 does not decrease immediately but presents a small increase. Thereafter, the radius r of the droplet 195 is slowly increased, and the viscous resistance f 2 received by the droplet 195 as it moves in the second liquid 699 mainly changes with the speed of movement of the outlet end 112 of the ejector head 110.
- the outlet end 112 of the ejector tip 110 is again generated with the last micro at the moment of the movement of the last microdroplet 199.
- the droplet 199 is equal in volume to the new droplet 195, and at this point the velocity of the exit end 112 of the jetting tip 110 is also the same as before one motion cycle.
- a new volume 195 of equal volume with the last microdroplet 199 is detached from the outlet end 112 of the ejector tip 110, which is droplet II in FIG. This cycle generates droplet III, droplet IV, and the like.
- the uniform discharge of the first liquid and the oscillating movement of the outlet end 112 of the ejector tip 110 in a sinusoidal variation together ensure the uniformity of volumetric size of the generated microdroplets 199.
- the outlet end 112 of the ejector head 110 is controlled to be a circular arc with a sinusoidal variation in displacement.
- the liquid discharge outlet tip end 110 of the maximum adhesion between the droplet 112 f 3 of 195 is fixed.
- the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 also increases.
- the viscous resistance f 2 of the droplet 195 as it moves in the second liquid 699 is greater than the instant of the maximum value f 3 of the adhesion between the outlet end 112 of the squirt head 110 and the droplet 195, and the droplet 195 is spit from The outlet end 112 of the liquid lance head 110 is detached to form droplets 199, which are droplets I in FIG. Entering the generation cycle of the next round of microdroplets 199.
- the first micro-droplet 199 is generated in the acceleration phase of the first half cycle of the oscillating motion in which the displacement of the ejection tip 110 is displaced at a sinusoidal variation, and the droplet I is in FIG.
- the speed of movement of the outlet end 112 of the ejector tip 110 is reduced, but due to the radius of the droplet 195 attached to the outlet end 112 of the ejector tip 110
- the increase is faster, and the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 does not decrease immediately but presents a small increase.
- the radius r of the droplet 195 is slowly increased, and the viscous resistance f 2 received by the droplet 195 as it moves in the second liquid 699 mainly changes with the speed of movement of the outlet end 112 of the ejector head 110.
- the first liquid is controlled to exit the outlet end 112 of the ejector tip 110 at a uniform flow rate.
- the outlet end 112 of the ejector tip 110 produces a second microdroplet 199 during the second half cycle acceleration phase of the sinusoidal oscillating motion, which is droplet II in FIG. Thereafter, the stage of stably generating the microdroplets 199 is entered.
- a new droplet 195 of equal volume to the second micro-droplet 199 is generated, and at this time the squirt gun
- the speed of movement of the outlet end 112 of the head 110 is also the same as before the half of the motion cycle.
- a new droplet 195 of equal volume with the second microdroplet 199 is detached from the outlet end 112 of the ejector tip 110, and thus circulated, thereby generating droplet III, droplet IV, droplet V, etc. shown in FIG. .
- the uniform discharge of the first liquid and the oscillating movement of the outlet end 112 of the ejector tip 110 in a sinusoidal variation together ensure the uniformity of volumetric size of the generated microdroplets 199.
- the condition that the droplet 195 attached to the outlet end 112 of the ejector tip 110 is separated from the outlet end 112 of the ejector tip 110 is approximately:
- the size of the generated micro-droplets 199 is uniform: the droplets 199 are equally spaced from the ejector tip The outlet end 112 of the 110 is detached.
- Factors affecting the maximum value f 3 of the adhesion between the outlet end 112 of the ejector tip 110 and the droplet 195 include: surface free energy of the ejector tip 110, geometric dimensions, and surface tension of the first liquid. In the case where the tips 110 without replacing the extruding liquid and the first liquid, the liquid discharge outlet tip end 110 of the maximum adhesion between the droplet 112 f 3 of 195 is fixed.
- the factors affecting the viscous resistance f 2 that the droplet 195 is subjected to when moving in the second liquid 699 include the viscosity coefficient ⁇ of the second liquid 699, the radius r of the droplet 195, and the moving velocity v of the droplet 195.
- the curve a indicates the displacement change of the outlet end 112 of the ejector head 110
- the curve b and the curve c are the droplets 199 when the viscous coefficient ⁇ of the second liquid 699 varies within a small range.
- the generation process curve When the viscosity coefficient ⁇ of the second liquid 699 varies within a small range, the generation timing of the micro-droplets 199 is changed only in a small range. The generation interval of the microdroplets 199 is not changed. As shown in FIG. 12, the generation time interval of the micro-droplets 199 represented by the curves b and c is half a period t/2, which ensures the uniformity of the volume size of the generated micro-droplets 199.
- the maximum adhesion force between the outlet end 112 of the ejection head 110 and the droplet 195 when the surface of the first liquid changes due to a temperature change or the like is changed when the ejection head 110 is replaced.
- f 3 is difficult to control precisely, so if the volume of the generated microdroplets 199 is insensitive to changes in f 3 over a certain range, then it is important to generate microdroplets 199 of uniform size.
- the curve a indicates the displacement change of the outlet end 112 of the ejector head 110
- the curve b and the curve c are the generation process curves of the microdroplet 199 when the ejector head 110 is replaced.
- the maximum value f 3 of the adhesion between the outlet end 112 of the spit gun head 110 and the droplet 195 fluctuates within a certain range, which causes the outlet end of the spit gun head 110 when the droplet 195 falls off.
- 112 corresponds to different speeds.
- the generation of the microdroplets 199 reaches a steady state, the velocity of the outlet end 112 of the spit gun head 110 is fixed during each wobble period when the droplets 195 fall off, as shown in FIG. 13, curve b and curve.
- the generation time interval of the micro-droplets 199 represented by c is half a period t/2. It is therefore possible to ensure that the interval at which the microdroplets 199 are generated is fixed.
- the volume of the generated microdroplets 199 is uniform. Simultaneously adjusting the flow rate of the outlet end 112 of the first liquid discharge ejector head 110 and the swing frequency of the outlet end 112 of the ejector head 110 in the second liquid 699 can simultaneously control the volume of the uniform volume microdroplet 199. And the generation rate.
- the maximum value of the adhesion force f 3 and the viscous resistance f 2 are tolerated, that is, the maximum adhesion is obtained.
- the value f 3 or the viscous resistance f 2 is varied within a certain range, it is still possible to generate the micro droplets 199 having a uniform volume.
- the range of variation of the maximum value f 3 that can be tolerated is determined as a platform under the premise of generating a micro-droplet 199 having a uniform volume. period.
- the presence of the plateau period is of great significance for the processing of the ejection tip 110 and the control of the formation temperature of the microdroplets 199.
- the presence of the plateau period allows the processing precision of the ejector head 110 to be reduced to a certain extent, and even if there is a difference in surface free energy between the squirting tips 110 of the same batch, it is possible to generate a micro-liquid of uniform size. Drop 199.
- the presence of the plateau period also allows the temperature control requirements of the microdroplet 199 generation process to be reduced to some extent.
- the presence of the plateau period allows the processing accuracy requirements of the ejector tip 110 or the temperature control requirements of the microdroplet 199 generation process to be reduced to a certain extent, further reducing consumable costs and control costs during the generation of the microdroplets 199.
- two micro-droplets 199 are generated in each movement cycle of the outlet end 112 of the ejector head 110, and it is easily understood that as long as the outlet end 112 of the ejector tip 110 is displaced, the sinusoidal cyclic movement is performed.
- the outlet end 112 of the ejector tip 110 can be displaced in a sinusoidal periodic motion in any direction within the second liquid 699.
- the trajectory of the exit end 112 of the ejector tip 110 is an arc, line or other shaped trajectory.
- the ejection head 110 is obliquely inserted into the second liquid 699, and the outlet end 112 of the ejection head 110 is swung under the liquid surface of the second liquid 699.
- a microdroplet 199 is produced.
- the outlet end 112 of the ejector head 110 performs a periodic motion in which the trajectory is a horizontal straight line and the displacement is sinusoidal in the second liquid 699 to generate a micro Droplet 199.
- the outlet end 112 of the ejector head 110 is moved in a periodic motion in which the second liquid 699 is in a straight line and the displacement is sinusoidal to generate Microdroplets 199.
- step S213 the outlet end 112 of the ejector head 110 is in a uniform shifting motion during the first half period and the second half period in one cycle of the change in the speed. Further, in step S213, the outlet end 112 of the ejector head 110 is equal in magnitude to the acceleration of the first half period and the second half period.
- the first liquid is controlled to exit the outlet end 112 of the ejector tip 110 at a uniform flow rate. As the first liquid is continuously discharged, the viscous resistance f 2 of the droplets 195 adhering to the outlet end 112 of the ejector tip 110 during the movement is also continuously increased.
- the droplet 195 is detached from the ejector tip 110 to form the microdroplet 199. This is followed by the generation of the next microdroplet 199.
- the frequency of movement and the speed of movement of the outlet end 112 of the ejector tip 110 are adapted to match the flow rate of the first liquid to ensure volume uniformity of the resulting microdroplets 199.
- the traditional spit gun head is generally straight tubular.
- the straight tubular spit gun head moves rapidly along its extending direction toward the end of the outlet end, it breaks the already formed micro-droplets.
- a ejector tip 110 for generating microdroplets 199 includes a needle stem 113 having a hollow cavity and an outlet end 112 disposed at one end of the needle stem 113.
- the angle between the normal line of the end face of the outlet end 112 of the ejection head 110 and the extending direction of the needle stem 113 is 90 or less.
- the movement of the end face away from the exit end 112 prevents the microdroplets 199 from being broken by the outlet end 112, maintaining the integrity of the generated microdroplets 199 while allowing the ejection of the sprinkler head 110 along the main body of the pipe.
- the direction is rapidly vibrated to quickly generate microdroplets 199.
- the ejection head 110 has a straight tubular shape, and the outlet end 112 of the ejection head 110 has a chamfered structure.
- the outlet end 112 of the ejection head 110 is chamfered, and the integrity of the generated micro-droplets 199 and the generation efficiency of the micro-droplets 199 are achieved, and the structure is simple, easy to implement, low in manufacturing cost, and high in batch processing precision. specialty.
- the angle between the normal line of the end surface of the outlet end 112 of the ejection head 110 and the extending direction of the needle stem 113 is between 15° and 75°, and the outlet of the ejection head 110 can be designed according to actual working conditions.
- the angle between the normal of the end face 112 and the direction in which the needle stem 113 extends should not be too large or too small to affect the formation of the microdroplets 199 or break the microdroplets 199.
- the angle between the normal line of the end surface of the outlet end 112 of the ejection head 110 and the extending direction of the needle stem 113 is between 30° and 60°. Specifically, the angle between the normal line of the end surface of the outlet end 112 of the ejection head 110 and the extending direction of the needle stem 113 is 45°.
- the 45° angle not only ensures the smooth formation of the micro-droplets 199, but also effectively squeezes the generated micro-droplets 199 away from the exit trajectory of the outlet end 112, preventing the outlet end 112 of the ejector tip 110 from breaking the generated micro-- Droplet 199.
- the portion of the needle stem 113 adjacent the outlet end 112 of the ejector head 110 includes a bent configuration.
- the outlet end 112 of the ejector tip 110 is bent, and the integrity of the generated micro-droplets 199 and the generation efficiency of the micro-droplets 199 are achieved, and the structure is simple, easy to implement, low in manufacturing cost, and high in batch processing accuracy. specialty.
- the angle between the normal line of the end surface of the outlet end 112 of the ejection head 110 and the extending direction of the needle stem 113 is between 15° and 75°, and the outlet of the ejection head 110 can be designed according to actual working conditions.
- the angle between the normal of the end face 112 and the direction in which the needle stem 113 extends should not be too large or too small to affect the formation of the microdroplets 199 or break the microdroplets 199. Further, the angle between the normal line of the end surface of the outlet end 112 of the ejection head 110 and the extending direction of the needle stem 113 is between 30° and 60°. Specifically, the angle between the normal line of the end surface of the outlet end 112 of the ejection head 110 and the extending direction of the needle stem 113 is 45°.
- the 45° angle not only ensures the smooth formation of the micro-droplets 199, but also effectively squeezes the generated micro-droplets 199 away from the exit trajectory of the outlet end 112, preventing the outlet end 112 of the ejector tip 110 from breaking the generated micro-- Droplet 199.
- the bending structure of the needle stem 113 near the outlet end 112 of the ejector head 110 has one or a combination of a polygonal line segment, a circular arc segment, a smooth curved segment, a straight segment, and the like. As shown in Fig. 17, in this embodiment.
- the portion of the needle stem 113 adjacent the outlet end 112 of the jetting lance tip 110 has a transitional arc segment, specifically a combination of a circular arc segment and a straight segment.
- the straight tubular spit gun head 110 can be bent at a set angle, and the processing is convenient.
- the squirting gun head 110 further includes a pin 114 having a reservoir 115 extending through the pin 114 in the extending direction of the pin 114.
- One end of the reservoir 115 communicates with one end of the needle stem 113 away from the outlet end 112 of the jetting lance head 110, and the end of the needle plug 114 away from the needle stem 113 is the inlet end 111 of the ejector head 110.
- the needle plug 114 is fixedly coupled to the needle stem 113.
- the first liquid used to generate the microdroplets 199 can be stored in advance in the pin 114, enabling continuous, batch generation of the microdroplets 199.
- the pin plug 114 is provided with a card slot 116 away from the inner surface of one end of the needle stem 113.
- the card slot 116 enables a detachable connection with the fluid drive mechanism 120. It is convenient to replace the spit gun head 110.
- the present application also provides a microdroplet 199 generating device for generating microdroplets 199 under the surface of the second liquid 699.
- the microdroplet 199 generating device includes a fluid driving mechanism 120, a motion control mechanism 130, and the liquid discharging gun tip 110 according to any one of the above aspects.
- the first liquid is stored inside the ejection head 110, and the ejection head 110 has an outlet end 112 and an inlet end 111.
- the fluid drive mechanism 120 is coupled to the inlet end 111 of the ejector head 110 for discharging the first liquid stored inside the ejector head 110 from the outlet end 112 of the squirt head 110.
- the motion control mechanism 130 is configured to control the outlet end 112 of the ejector head 110 to generate a set trajectory or a set speed or a set acceleration under the liquid level of the second liquid 699 so that the outlet of the ejector head 110 is discharged.
- the first liquid of end 112 forms microdroplets 199 within second liquid 699 against surface tension and adhesion.
- the ejector tip 110 provided herein produces microdroplets 199 during the movement of the second liquid 699 below the surface of the liquid.
- a liquid discharge outlet tip 110 of the end 112 of the speed is made as a square wave variation of motion in the second liquid level 699, the size of the acceleration a 1.
- the first liquid is discharged from the outlet end 112 of the ejector head 110 to form a droplet 195 attached to the outlet end 112 of the squirt head 110.
- the droplet 195 exits the outlet end 112 of the ejector tip 110 at the instant of instantaneous acceleration of the outlet end 112 of the ejector tip 110 to form microdroplets 199. As shown in FIG.
- the forces received by the micro-droplets 199 before exiting the outlet end 112 of the ejector tip 110 are gravity G, buoyancy f 1 of the second liquid 699, and viscous resistance of the second liquid 699, respectively.
- Mass microdroplets outlet 199 from the liquid discharge end 112 of the tip 110 before is m, the size of the acceleration a 2. According to Newton’s second law of motion, it is easy to draw
- the viscous resistance f 2 6 ⁇ rv received by the droplet 195 as it moves in the second liquid 699, where ⁇ is the viscosity coefficient of the second liquid 699 and r is the droplet 195 The radius, v is the speed of movement of the droplet 195.
- the velocity of the droplet 195 is zero before the exit end 112 of the ejector tip 110 is instantaneously accelerated, so that the droplet 195 is viscous in the second liquid 699 at the moment the tip end 112 of the ejector tip 110 is instantaneously accelerated.
- the resistance f 2 is zero or very small.
- the droplet diameter typically in the range of pi to 195 microliters of magnitude, and opposite to gravity G 195 and the second liquid droplet buoyancy f 1 direction 699, thus the droplet 195
- the vector sum of the gravitational force f 1 of the gravity G and the second liquid 699 is about zero.
- Existence It can be seen from Newton's second law of motion that the maximum acceleration that the droplet 195 can reach in the second liquid 699 is a 2 ⁇ f 3 /m when the outlet end 112 of the ejector tip 110 is subjected to the instantaneous acceleration motion, wherein m is a liquid Drop the quality of 195.
- the condition in which the droplet 195 is detached from the outlet end 112 of the ejector tip 110 i.e., a droplet 199 is generated) is approximately: a 2 ⁇ (f 3 /m) ⁇ a 1 .
- the magnitude of the instantaneous acceleration of the outlet end 112 of the ejector head 110 can be precisely controlled. As long as the value of the instantaneous acceleration of the outlet end 112 of the ejector head 110 is controlled to be large, the instantaneous acceleration movement of the outlet end 112 of the ejector head 110 can effectively generate the droplet 195.
- one or two or more microdroplets 199 are formed during one cycle of the outlet end 112 of the ejector tip 110.
- the angle between the normal line of the end surface of the outlet end 112 of the ejector head 110 and the extending direction of the pipe main body is 45°, and the outlet end of the ejector head 110 112 is a beveled structure.
- the liquid level of the second liquid 699 is upward, and the ejection head 110 is vertically arranged.
- the outlet end 112 of the ejector tip 110 is traversed under the liquid level of the second liquid 699 as a vertical straight line segment, and the velocity is a square wave.
- a microdroplet 199 is created during one cycle of the exit end 112 of the ejector tip 110.
- a first liquid is stored in the ejector tip 110.
- the fluid drive mechanism 120 controls the ejector head 110 to discharge an equal volume of the first liquid from the outlet end 112 during each movement cycle of the ejector tip 110.
- the droplet 195 attached to the outlet end 112 of the ejector tip 110 reaches a set volume size, the outlet end 112 of the ejector tip 110 is instantaneously accelerated downward by the acceleration of the size a 1 from the upper limit position while being attached.
- the droplet 195 at the outlet end 112 of the ejector tip 110 exits the outlet end 112 of the ejector tip 110 to form microdroplets 199.
- the micro-droplets 199 move away from the exit trajectory of the outlet end 112 to the side wall of the ejector tip 110.
- the outlet end 112 of the ejector tip 110 continues to move downward while the first liquid still exits the outlet end 112 of the ejector tip 110 to form a drop 195 that adheres to the outlet end 112 of the ejector tip 110.
- the outlet end 112 of the ejector head 110 is moved to the lower limit position, the outlet end 112 of the ejector head 110 is moved upward by the lower limit position.
- the first liquid still exits the outlet end 112 of the ejector tip 110 during the upward movement of the outlet end 112 of the ejector tip 110 from the lower extreme position, and the volume of the droplet 195 attached to the outlet end 112 of the ejector tip 110 Increase.
- the volume of the droplet 195 attached to the outlet end 112 of the ejector tip 110 is equal to the volume of the previously detached droplet 199. Extruding liquid outlet end 112 of tip 110 from the upper limit position again to a size of a downward acceleration of the instantaneous acceleration a new form microdroplets 199, and so on.
- the angle between the normal line of the end surface of the outlet end 112 of the ejector head 110 and the extending direction of the pipe main body is 45°, and the outlet end of the ejector head 110 is provided.
- 112 is a beveled structure.
- the liquid level of the second liquid 699 is upward, and the ejection head 110 is vertically arranged.
- the outlet end 112 of the ejector tip 110 is traversed under the liquid level of the second liquid 699 as a vertical straight line segment, and the velocity is a square wave.
- Two microdroplets 199 are created during one cycle of the exit end 112 of the ejector tip 110.
- a first liquid is stored in the ejector tip 110.
- the fluid drive mechanism 120 controls the first liquid to exit the outlet end 112 at a uniform flow rate.
- the droplet 195 attached to the outlet end 112 of the ejector tip 110 reaches a set volume size, the outlet end 112 of the ejector tip 110 is instantaneously accelerated downward by the acceleration of the size a 1 from the upper limit position while being attached.
- the droplet 195 at the outlet end 112 of the ejector tip 110 exits the outlet end 112 of the ejector tip 110 to form microdroplets 199.
- the micro-droplets 199 move away from the exit trajectory of the outlet end 112 to the side wall of the ejector tip 110.
- the outlet end 112 of the ejector tip 110 continues to move downward.
- the first liquid still exits the outlet end 112 of the ejector head 110 to form a droplet 195 attached to the outlet end 112 of the squirt head 110, and the volume of the droplet 195 attached to the outlet end 112 of the squirt head 110.
- the volume of the droplet 195 attached to the outlet end 112 of the ejector tip 110 is equal to the volume of the previously detached droplet 199.
- the micro-droplets 199 generated when the outlet end 112 of the ejector tip 110 is in the lower limit position are only moved upward by a small distance under the adhesion of the outlet end 112, and then gradually fall in the second liquid 699.
- the first liquid still exits the outlet end 112 of the ejector tip 110 during the upward movement of the outlet end 112 of the ejector tip 110 from the lower extreme position, and the volume of the droplet 195 attached to the outlet end 112 of the ejector tip 110 Increase.
- the volume of the droplet 195 attached to the outlet end 112 of the ejector tip 110 is equal to the volume of the previously detached droplet 199. Extruding liquid outlet end 112 of tip 110 from the upper limit position again to a size of a downward acceleration of the instantaneous acceleration a new form microdroplets 199, and so on.
- the ejector tip 110 provided herein produces microdroplets 199 during the movement of the second liquid 699 below the surface of the liquid.
- the outlet end 112 of the ejector tip 110 is displaced in a sinusoidal motion under the liquid level of the second liquid 699.
- the first liquid is discharged from the outlet end 112 of the ejector head 110 to form a droplet 195 attached to the outlet end 112 of the squirt head 110.
- the droplet 195 exits the outlet end 112 of the ejector tip 110 to form microdroplets 199 as the speed of movement of the outlet end 112 of the ejector tip 110 reaches a certain level. As shown in FIG.
- the forces received by the microdroplets 199 before exiting the outlet end 112 of the ejector tip 110 are gravity G, the buoyancy f 1 of the second liquid 699, and the viscous resistance of the second liquid 699, respectively.
- Mass microdroplets outlet 199 from the liquid discharge end 112 of the tip 110 before is m, speed v, acceleration a 2.
- the droplet 195 is affected by the viscous force f 2 , the gravity G, the buoyancy f 1 , and the adhesion force f 3 during the movement of the second liquid 699.
- the diameter of the droplets 195 generally ranges from aspirated to microliters, while the viscosity of the second liquid 699 is generally relatively large. Therefore, there are generally Therefore, during the shifting cycle of the outlet end 112 of the ejector tip 110 under the liquid level of the second liquid 699, the droplet 195 is detached from the outlet end 112 of the ejector tip 110 (i.e., a microdroplet 199 is formed). Approximate Optionally, one or two or more microdroplets 199 are formed during one cycle of the outlet end 112 of the ejector tip 110.
- the angle between the normal line of the end surface of the outlet end 112 of the ejection head 110 and the extending direction of the pipe main body is 45°, and the needle stem 113 is close to the ejection head.
- the portion of the exit end 112 of 110 is a bent configuration.
- the liquid level of the second liquid 699 is upward, and the ejection head 110 is vertically arranged.
- the outlet end 112 of the ejector tip 110 is traversed in a vertical straight line under the liquid level of the second liquid 699, and the displacement is sinusoidally changed.
- a microdroplet 199 is created during one cycle of the exit end 112 of the ejector tip 110.
- a first liquid is stored in the ejector tip 110.
- the fluid drive mechanism 120 controls the ejector head 110 to discharge an equal volume of the first liquid from the outlet end 112 during each movement cycle of the ejector tip 110.
- the first micro-droplet 199 is generated at an accelerated descending phase of the linear motion in which the displacement at the outlet end 112 of the ejector tip 110 is sinusoidal.
- the radius r of the droplet 195 attached to the outlet end 112 of the ejector tip 110 is increased. Fast, the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 does not decrease immediately but instead exhibits a small increase.
- the radius r of the droplet 195 is slowly increased, and the viscous resistance f 2 received by the droplet 195 as it moves in the second liquid 699 mainly changes with the speed of movement of the outlet end 112 of the ejector head 110.
- the outlet end 112 of the ejector head 110 is lowered to the extreme position and begins to rise, while the volume of the droplet 195 adhering to the outlet end 112 of the ejector head 110 is continuously increased.
- the outlet end 112 of the ejector tip 110 is again generated with the last micro at the moment of the movement of the last microdroplet 199.
- the droplet 199 is equal in volume to the new droplet 195, and at this point the velocity of the exit end 112 of the jetting tip 110 is also the same as before one motion cycle.
- a new volume 195 of equal volume with the last microdroplet 199 is detached from the outlet end 112 of the ejector tip 110 and thus circulated.
- the uniform discharge of the first liquid and the oscillating movement of the outlet end 112 of the ejector tip 110 in a sinusoidal variation together ensure the uniformity of volumetric size of the generated microdroplets 199.
- the outlet end 112 of the ejector tip 110 is again moved downward from the upper limit position, if the droplet 199 is still present within the trajectory immediately below the outlet end 112, the droplet 195 attached to the outlet end 112 strikes.
- the generated microdroplets 199, the generated microdroplets 199 move along the normal to the end face of the exit end 112 to move away from the exit trajectory of the exit end 112.
- the angle between the normal line of the end surface of the outlet end 112 of the ejection head 110 and the extending direction of the pipe main body is 45°, and the needle stem 113 is close to the ejection head.
- the portion of the exit end 112 of 110 is a bent configuration.
- the liquid level of the second liquid 699 is upward, and the ejection head 110 is vertically arranged.
- the outlet end 112 of the ejector tip 110 is traversed in a vertical straight line under the liquid level of the second liquid 699, and the displacement is sinusoidally changed.
- Two microdroplets 199 are created during one cycle of the exit end 112 of the ejector tip 110.
- a first liquid is stored in the ejector tip 110.
- the fluid drive mechanism 120 controls the first liquid to exit the outlet end 112 at a uniform flow rate.
- the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 also increases.
- the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 is greater than the outlet end 112 and the droplet 195 of the ejector tip 110.
- the maximum value f 3 between the adhesions, the droplets 195 are detached from the outlet end 112 of the ejector head 110 to form microdroplets 199.
- the micro-droplets 199 move away from the exit trajectory of the outlet end 112 to the side wall of the ejector tip 110.
- the outlet end 112 of the ejector tip 110 continues to move downwardly, and the outlet end 112 of the ejector tip 110 is lowered to the extreme position and begins to rise.
- the first liquid still exits the outlet end 112 of the ejector head 110 to form a droplet 195 attached to the outlet end 112 of the squirt head 110, and the volume of the droplet 195 attached to the outlet end 112 of the squirt head 110.
- the speed of movement of the outlet end 112 of the ejector tip 110 is reduced, but due to the radius of the droplet 195 attached to the outlet end 112 of the ejector tip 110
- the increase is faster, and the viscous resistance f 2 experienced by the droplet 195 as it moves in the second liquid 699 does not decrease immediately but presents a small increase.
- the radius r of the droplet 195 is slowly increased, and the viscous resistance f 2 received by the droplet 195 as it moves in the second liquid 699 mainly changes with the speed of movement of the outlet end 112 of the ejector head 110.
- the outlet end 112 of the ejector tip 110 is in an upward acceleration phase.
- the volume of the droplet 195 attached to the outlet end 112 of the ejector tip 110 is equal to the volume of the previously detached droplet 199, and the velocity of the outlet end 112 of the ejector tip 110 is also half a cycle ago.
- the droplets 195 attached to the outlet end 112 exit the outlet end 112 to form new microdroplets 199.
- the droplets 199 generated when the outlet end 112 of the ejector tip 110 is in the upward acceleration phase are only moved upward by a small distance under the adhesion of the outlet end 112, and then gradually fall in the second liquid 699.
- the first liquid still exits the outlet end 112 of the ejector head 110 to form a droplet 195 attached to the outlet end 112 of the squirt head 110, and the volume of the droplet 195 attached to the outlet end 112 of the squirt head 110.
- the outlet end 112 of the ejector tip 110 is in a downward acceleration phase.
- the volume of the droplet 195 attached to the outlet end 112 of the ejector tip 110 is equal to the volume of the previously detached droplet 199, and the velocity of the outlet end 112 of the ejector tip 110 is also half a cycle ago.
- the droplets 195 attached to the outlet end 112 exit the outlet end 112 to form new microdroplets 199, thus circulating.
- the first liquid is controlled to exit the outlet end 112 of the ejector tip 110 at a uniform flow rate.
- the outlet end 112 of the ejector tip 110 is in the stage of stably generating the microdroplets 199 after the second microdroplet 199 is generated in the second half cycle acceleration phase in which the trajectory is a vertical straight line and the displacement is sinusoidally changed.
- the uniform discharge of the first liquid and the oscillating movement of the outlet end 112 of the ejector tip 110 in a sinusoidal variation together ensure the uniformity of volumetric size of the generated microdroplets 199.
- micro-droplet generating device and the generating method provided by the present application are widely used in medical clinical testing, nano material preparation, food and environmental testing, biochemical analysis and the like.
- the device for generating microdroplets 199 and the method for generating the same are applied in a polymerase chain reaction (PCR).
- PCR polymerase chain reaction
- the cross-sectional size of the spit gun tip 110 is generally on the order of micrometers. Conventional surface treatment methods are often used for larger size parts and are not fully applicable to the smaller size spit gun head 110.
- an embodiment of the present invention provides a surface treatment method for a liquid discharge gun head 110 for performing surface treatment on the liquid discharge gun head 110, including the following steps: S260, performing the liquid discharge gun head 110 Silicidation treatment; S270, treating the discharge gun head 110 with an aqueous solution of diethylpyrocarbonate (DEPC); S280, drying the discharge gun head 110.
- S260 performing the liquid discharge gun head 110 Silicidation treatment
- S270 treating the discharge gun head 110 with an aqueous solution of diethylpyrocarbonate (DEPC)
- S280 drying the discharge gun head 110.
- the silanization treatment reduces the surface free energy of the ejector head 110 and controls the surface free energy of the ejector head 110 within a certain interval, thereby reducing the surface characteristics of the ejector head 110.
- the effect on the microdroplet 199 generation process is not limited to the surface treatment method of the ejector head 110.
- step S240 is further included to pre-process the liquid discharge gun head 110.
- the pre-processing includes one or more of the operations of degreasing, decontaminating or cleaning the liquid discharge gun head 110.
- Degreasing, decontaminating, and cleaning the ejector tip 110 can effectively remove contaminants or interferences adhering to the surface of the squirt head 110 during the pre-processing.
- the surface of the ejector head 110 is assisted in degreasing, auxiliary decontamination or auxiliary cleaning using ultrasonic vibration.
- the liquid sprinkling head 110 is degreased, decontaminated and cleaned in an ultrasonic environment, and the chemical means and the mechanical means are used together to ensure the surface pretreatment effect of the spit gun head 110.
- the squirting gun head 110 is made of stainless steel, and the squirting lance head 110 is washed with a stainless steel cleaning agent.
- the stainless steel cleaning agent has a higher cleaning effect on the stainless steel spit gun head 110.
- the pretreatment of the surface of the ejector head 110 may be other methods that enable surface cleaning of the squirt head 110.
- the ejector tip 110 is one of a quartz capillary tube, a glass tube, a dual fiber capillary tube, and the like.
- the method further comprises the step S250 of electropolishing the liquid discharge nozzle.
- Electropolishing reduces the surface roughness of the smaller size jetting head 110 to achieve the silanization requirements of the surface quality of the jetting tip 110. Electropolishing is critical to the surface quality of the squirting tip 110 and is the key to the surface quality of the stainless steel spit tip 110.
- the spit gun head 110 made of stainless steel is used as an anode, and insoluble copper or the like is used as a cathode in the electrolytic solution.
- the process parameters for electropolishing the spit gun head 110 are as follows:
- the ejection head 110 used has an inner diameter of 60 ⁇ m and an outer diameter of 150 ⁇ m. After the electropolishing was finished, it was magnified 50 times under a metallographic microscope to observe no scratches.
- an amorphous silicon film can be formed on the surface of the ejection head 110, and preferably an amorphous silicon film is formed on the surface of the ejection head 110 by chemical vapor deposition.
- the thickness of the amorphous silicon film is preferably from 100 angstroms to 1000 angstroms.
- the step S260 includes: S261, cleaning or immersing the ejector head 110 with deionized water; S262, treating the squirting head with a silylating agent 110; S263, washing or immersing the ejector tip 110 with deionized water.
- the electrolyzed spit head 110 is washed or soaked with deionized water prior to silanization to remove stains and static electricity on the surface of the spit head 110.
- the silanization treatment reduces the surface free energy of the ejector tip 110 and controls the surface free energy of the ejector tip 110 within a certain interval, reducing the influence of the surface characteristics of the ejector tip 110 on the process of generating the droplets 199.
- the silanized blister head 110 is washed or immersed in deionized water to remove stains and static electricity on the surface of the squirt head 110.
- an amorphous silicon film on the surface of the ejector head 110 by chemical vapor deposition using a silylation reagent.
- the silylating agent is preferably a silicon tetrahydride gas, more preferably a mixed gas comprising silicon tetrahydride and hydrogenated phosphorus as a dopant.
- An amorphous silicon treatment film is formed on the surface of the ejection head 110 to reduce the surface free energy of the ejection head 110.
- the specific steps of the surface silanization treatment of the stainless steel in this embodiment are as follows: the electrolyzed stainless steel spit gun head 110 is placed in a chemical vapor deposition chamber, the surface water vapor of the spit gun head 110 is removed, and the chemical vapor deposition chamber is evacuated to a vacuum; The gas mixture of tetrahydrogen silicon and hydrogen hydride is introduced, the gas pressure deposition gas pressure is controlled in the range of 0.1 Pa to 500 Pa, and the vapor deposition temperature is controlled at 180 ° C to 500 ° C for chemical vapor deposition; the deposition time is 0.4 h to 8 h; Nitrogen gas was introduced and it was cooled to room temperature. Specifically, the volume percentage of the tetrahydrosilane in the mixed gas is from 95.0% to 99.9%, and the volume percentage of the hydrogenated phosphorus in the mixed gas is from 0.1% to 5.0%.
- the step S270 includes: S271, soaking the spit gun head 110 with a volume fraction of 0.5%-1.5% aqueous diethylpyrocarbonate for 10 min-20 min; S272, the spitting liquid
- the tip 110 is autoclaved.
- the ejection tip 110 is soaked in a 1% volume of DEPC aqueous solution to ensure that the surface of the ejection head 110 is free of Ribonuclease (RNase) and deoxyribonuclease (DNase), etc.
- RNase Ribonuclease
- DNase deoxyribonuclease
- the time for soaking the spit head 110 using a 1% volume aqueous solution of DEPC may depend on the particular conditions.
- the ejector tip 110 is immersed in a DEPC aqueous solution having a volume fraction of 1% for 15 minutes. After testing, 15 minutes is enough to remove the RNase and DNase on the surface of the spit gun head 110.
- the spit gun head 110 is further purified by using a nitrogen purifying furnace to purify, dry and bake the spit gun head 110. Nitrogen gas is used as a shielding gas when drying the spit gun head 110. The use of nitrogen as a shielding gas can effectively prevent a chemical reaction between the relatively chemically active gas in the environment and the surface of the ejector tip 110, thereby achieving effective protection of the ejector tip 110.
- the ejection head 110 used has an inner diameter of 60 ⁇ m and an outer diameter of 150 ⁇ m.
- the electrolyzed spit gun head 110 was immersed in deionized water for 5 min. Then, the ejection head 110 is placed in a chemical vapor deposition chamber, and after evacuation, a mixed gas of silicon tetrahydride and hydrogen hydride is introduced.
- the vapor deposition pressure was controlled at 300 ⁇ 20 Pa, and the vapor deposition temperature was controlled at 350 ⁇ 20 °C.
- the volume percentage of the tetrahydrosilane in the mixed gas was 97.0%, and the volume percentage of the hydrogenated phosphorus in the mixed gas was 3.0%.
- the deposition time was 2 h. After the deposition was completed, nitrogen gas was introduced and the temperature was lowered to room temperature.
- the silanized blister head 110 is washed with deionized water.
- the entire ejector tip 110 was immersed for 15 min with a 1% DEPC aqueous solution and the ejector tip 110 was autoclaved. Finally, the spit gun head 110 is placed in a nitrogen purifying furnace for surface cleaning.
- Eighteen sprinkler heads 110 of the same size were batch processed using the surface treatment method of the spit gun head 110 provided in the examples of the present application, and then the drop 195 suspension test was performed using the 18 spit tips 110, respectively.
- the first liquid was discharged from the outlet end 112 of the ejector head 110 at a flow rate of 1.0 nL/s using a fluid control mechanism.
- Counting from the drop of the last microdroplet 199, each spit tip 110 calculates the drop time of 100 microdroplets 199.
- the average time data of the corresponding 100 droplets 195 drop of the 18 spit gun heads 110 are as follows:
- the relative variation range of the average drop time of the corresponding microdroplets 199 of the 18 spit tips 110 can directly reflect the relative variation range of the surface free energy between the 18 spit tips 110. From the above experimental data, it can be concluded that the standard deviation of the surface free energy of the jetting head 110 after batch processing using the surface treatment method of the liquid discharging head 110 provided by the embodiment of the present application is 1.33%. Sufficient to meet the volume uniformity requirements of various types of generated microdroplets 199.
- one end of the ejector tip 110 is an outlet end 112 for surface treatment of the outlet end 112 and the outer side wall of the ejector tip 110.
- the outlet end 112 and the outer side wall of the ejector tip 110 are surface-treated.
- the outlet end and the outer wall of the ejector tip 110 contact the generated micro-droplets 199, and are uniform. The surface can effectively push the micro-droplets 199 away from breaking the micro-droplets 199.
- the conventional fluid-driven mechanism In the process of generating micro-droplets, the conventional fluid-driven mechanism is in a moving state at the outlet end of the ejection head, and the flow rate of the discharged liquid is unstable and uncontrollable.
- the generated microdroplet volume size is random. Based on this, it is necessary to provide a kind of randomness problem for the volume of microdroplets caused by the unstable and uncontrollable flow rate of the discharge liquid when the traditional spit gun head is in motion.
- a fluid drive mechanism that discharges liquid at a constant flow rate.
- the first liquid exits the outlet end 112 of the ejector tip 110 at a set flow rate.
- the outlet end 112 of the ejector tip 110 performs a periodic motion including instantaneous acceleration, not only can the micro-droplets 199 be efficiently generated, but also the size of the generated micro-droplets 199 can be controlled.
- the outlet end 112 of the ejector tip 110 is moved in a periodic sinusoidal variation, the micro-droplets 199 cannot be efficiently generated, and the generated micro-droplets 199 have good volume-size uniformity.
- the first liquid is discharged by the fluid drive mechanism 120 at a set flow rate at the outlet end 112 of the ejector head 110.
- the present application provides a fluid drive mechanism 120 for use in a micro-droplet generation system including a variable volume assembly 121 and a power assembly 122.
- the variable volume assembly 121 includes a syringe 1211 and a push rod 1212.
- the push rod 1212 is slidably engaged with the inner wall of the syringe 1211, and the driving liquid 1214 can be stored in the syringe 1211.
- the syringe 1211 has an inlet and outlet port 1213 for communicating with the inlet end 111 of the ejector tip 110 in which the first liquid 190 is stored.
- the power assembly 122 is drivingly coupled to the push rod 1212 for driving the push rod 1212 to slide in the direction in which the syringe 1211 extends.
- the power assembly 122 drives the push rod 1212 to be squeezed and stored in the syringe 1211 to drive the liquid 1214.
- the driving liquid 1214 squeezes the first liquid 190 stored in the ejection head 110, and The first liquid 190 is discharged from the outlet end 112 of the ejector head 110.
- the fluid drive mechanism 120 provided by the present application utilizes the incompressibility of the liquid (driving liquid 1214) to ensure that the outlet end 112 of the ejector head 110 can still spit the first liquid 190 at a set flow rate when vibrating at a high frequency.
- the outlet end 112 of the liquid gun head 110 is discharged.
- the fluid drive mechanism 120 provided herein is capable of accurately controlling the volume of generated microdroplets 199.
- the fluid drive mechanism 120 provided by the present application is not limited to the above embodiment, and for example, a peristaltic pump, a pressure driven pump, a pneumatic drive pump, an electroosmotic drive pump, or the like may be employed.
- the inlet and outlet port 1213 of the syringe 1211 communicates with the inlet end 111 of the ejector head 110 through a capillary tube 123.
- a driving liquid 1214 is stored in the syringe 1211 and in the capillary 123.
- the power assembly 122 is drivingly coupled to the push rod 1212 of the variable volume assembly 121 for urging the push rod 1212 of the variable volume assembly 121 to slide within the syringe 1211.
- the power assembly 122 pushes the push rod 1212 of the variable volume assembly 121.
- the push rod 1212 squeezes the driving liquid 1214 stored in the syringe 1211 and the capillary tube 123, and the driving liquid 1214 is squeezed and stored in the spit.
- the first liquid 190 in the liquid gun head 110 discharges the first liquid 190 from the outlet end 112 of the squirt head 110.
- the inlet and outlet port 1213 of the syringe 1211 is connected to the inlet end 111 of the ejector head 110 by using a thin tube 123.
- the inner diameter of the capillary tube 123 is small, so that the volume of the discharged liquid can be accurately controlled by controlling the stroke of the push rod 1212.
- the use of the thin tube 123 enables flexible placement of the position and distance between the syringe 1211 and the ejector tip 110, facilitating the placement of other necessary equipment between the syringe 1211 and the ejector tip 110.
- the power assembly 122 pushes the push rod 1212 to slide at a uniform speed within the syringe 1211, that is, the driving liquid 1214 is discharged from the inlet and outlet port 1213 of the variable volume assembly 121 at a uniform flow rate under the push of the push rod 1212.
- the ejector tip 110 is introduced through the thin tube 123 at a uniform flow rate.
- the first liquid 190 stored in the ejector tip 110 is discharged by the driving liquid 1214 at a uniform flow rate through the outlet end 112 of the ejector tip 110.
- the fluid driving mechanism 120 provided in the present embodiment can not only be the first at a uniform flow rate when the ejection head 110 is at rest.
- the liquid 190 is discharged from the outlet end 112 of the ejector head 110.
- the fluid drive mechanism 120 provided in the present embodiment can ensure that the first liquid 190 is discharged from the outlet end 112 of the ejector head 110 at a uniform flow rate.
- the fluid drive mechanism 120 provided by this embodiment greatly improves the volume size uniformity of the generated micro-droplets 199.
- the function of the power assembly 122 is to drive the push rod 1212 to slide in the direction of the injection port 1211 away from the inlet and outlet port 1213 or in the direction of the inlet and outlet port 1213.
- the power component 122 may be a component that directly outputs a linear motion such as a cylinder or a hydraulic cylinder, or may be a component that converts a circular motion into a linear motion, such as a combination of a motor and a synchronous pulley, a motor and a screw 1222, and a slide.
- the combination of block 1223, and the like does not limit the specific structure of the power assembly 122. As shown in FIG.
- the power assembly 122 includes a drive motor 1221, a lead screw 1222, and a slider 1223.
- the output shaft of the driving motor 1221 is drivingly coupled to one end of the screw 1222.
- the slider 1223 has an internal thread, and the slider 1223 is coupled to the external thread of the surface of the screw 1222.
- the outer edge of the slider 1223 is fixedly coupled to the end of the push rod 1212 remote from the syringe 1211.
- the slider 1223 cooperates with the screw 1222 to convert the rotational motion of the output of the driving motor 1221 into a linear motion of the slider 1223 along the axial direction of the screw 1222, thereby driving the push rod 1212 of the variable volume assembly 121 to slide within the syringe 1211.
- the drive motor 1221 used in the present embodiment is a servo motor.
- the servo motor has the characteristics of precise feedback and control of output angular displacement.
- the fluid drive mechanism 120 further includes a three-way reversing valve 124 and a liquid storage tank 125.
- the three-way reversing valve 124 has a first interface, a second interface, and a third interface.
- the inlet end 111 of the ejector head 110, the inlet and outlet port 1213 of the variable volume unit 121, and the reservoir tank 125 are in communication with the first port, the second port, and the third port of the three-way directional control valve 124, respectively.
- the three-way switching valve 124 can control at least the fluid driving mechanism 120 to realize the following two modes: 1.
- the inlet and outlet port 1213 of the variable volume component 121 is connected to the inlet end 111 of the ejector head 110, and is driven by the power component 122.
- the variable volume assembly 121 provides a liquid driving force to the ejector head 110 for discharging the first liquid 190 in the ejector head 110 from the outlet end 112 of the squirt head 110, or from the first liquid 190
- the outlet end 112 of the ejector tip 110 is drawn into the ejector head 110. 2.
- the inlet and outlet port 1213 of the variable volume assembly 121 is communicated with the liquid storage tank 125.
- variable volume assembly 121 draws the driving liquid 1214 in the liquid storage tank 125 into the variable volume assembly 121. Within the syringe 1211, the drive fluid in the variable volume assembly 121 is pushed into the reservoir 125.
- an embodiment of the present application further provides a fluid driving method using the fluid driving mechanism, including the following steps: (1)
- the three-way switching valve 124 makes the inlet and outlet ports 1213 of the variable volume component 121 and the storage.
- the liquid tank 125 is in communication.
- the push rod 1212 slides in the syringe 1211 toward the end remote from the inlet and outlet port 1213 to change the volume of the syringe 1211 to draw the drive liquid 1214 in the reservoir 125 into the syringe 1211.
- the three-way switching valve 124 communicates the inlet and outlet port 1213 of the variable displacement unit 121 with the inlet end 111 of the discharge gun head 110.
- the push rod 1212 slides in the syringe 1211 toward the end close to the inlet and outlet port 1213 to change the volume of the syringe 1211 to discharge the inside of the syringe 1211, the narrow tube 123 and the ejection head 110. gas.
- the outlet end 112 of the ejector tip 110 is introduced into the first liquid 190, and the three-way directional valve 124 is maintained to communicate the inlet and outlet port 1213 of the variable volume assembly 121 with the inlet end 111 of the ejector head 110.
- the push rod 1212 slides in the syringe 1211 toward the end remote from the inlet and outlet port 1213 to change the volume of the syringe 1211 to draw the first liquid 190 into the ejection head 110.
- the three-way switching valve 124 is maintained to communicate the inlet and outlet port 1213 of the variable displacement unit 121 with the inlet end 111 of the discharge gun head 110.
- the push rod 1212 slides uniformly in the syringe 1211 toward the end close to the inlet and outlet port 1213 to change the volume of the syringe 1211 to uniformize the first liquid 190 stored in the ejector head 110.
- the flow rate exits the outlet end 112 of the jetting tip 110.
- the inlet and outlet port 1213 of the syringe 1211 is mounted upward, and the push rod 1212 is vertically in the syringe 1211. slide.
- the number of the ejection lances 110 is plural, and the plurality of ejector tips 110 are arranged side by side or arranged in other forms.
- Each of the ejector tips 110 is in communication with a first interface of the three-way directional valve 124 via a separate capillary tube 123.
- the number of variable volume assemblies 121 is one, and the inlet and outlet ports 1213 of the variable volume assembly 121 are in communication with the second interface of the three-way switching valve 124.
- the third port of the three-way reversing valve 124 is in communication with the reservoir 125.
- the push rod 1212 slides uniformly in the direction of the inlet and outlet port 1213 in the syringe 1211, while pressing the driving liquid 1214 into the plurality of ejection heads 110. Since the plurality of thin tubes 123 are in a parallel relationship, the flow rate of the driving liquid 1214 in each of the thin tubes 123 is the same, and the first liquid 190 in the plurality of ejection heads 110 is ensured to discharge the discharged liquid at the same constant flow rate. The outlet end 112 of the tip 110. Further, the volume size uniformity of the generated micro-droplets 199 is ensured.
- the number of the ejection lance head 110 and the variable volume module 121 is plural.
- the plurality of ejector tips 110 are arranged side by side or in other forms.
- Each of the ejector tips 110 is in communication with a first interface of the three-way directional valve 124 via a separate capillary tube 123.
- the inlet and outlet port 1213 of each variable volume assembly 121 is also in communication with the second interface of the three-way switching valve 124 via a separate capillary tube 123.
- the third port of the three-way reversing valve 124 is in communication with the reservoir 125.
- the plurality of variable volume assemblies 121 are arranged side by side or in other forms.
- the ends of the push rods 1212 of the plurality of variable volume assemblies 121 remote from the syringe 1211 are relatively fixed and are simultaneously pushed by the power assembly 122.
- the plurality of push rods 1212 slide uniformly in the respective syringes 1211 in a direction close to the inlet and outlet port 1213, while squeezing the driving liquid 1214 into the plurality of jetting heads 110. Since the plurality of thin tubes 123 are in a parallel relationship, the flow rate of the driving liquid 1214 in each of the thin tubes 123 is the same, and the first liquid 190 in the plurality of ejection heads 110 is ensured to discharge the discharged liquid at the same constant flow rate. The outlet end 112 of the tip 110. Further, the volume size uniformity of the generated micro-droplets 199 is ensured.
- the number of the squirting lance head 110, the variable-volume component 121, and the three-way directional control valve 124 are the same and are multiple .
- the inlet end 111 of each of the ejector tips 110 is in communication with a first interface of a three-way directional valve 124 via a separate capillary tube 123.
- the inlet and outlet ports 1213 of each variable volume assembly 121 are respectively communicated with the second interface of a three-way switching valve 124 via separate thin tubes 123.
- the third port of each three-way reversing valve 124 is in communication with the reservoir 125, respectively.
- the liquid storage tanks 125 may be one or more.
- the first liquid 190 in each of the ejector tips 110 may be the same or different.
- the plurality of variable volume assemblies 121 are arranged side by side or in other forms. The ends of the push rods 1212 of the plurality of variable volume assemblies 121 remote from the syringe 1211 are relatively fixed and are simultaneously pushed by the power assembly 122. Driven by the power assembly 122, the plurality of push rods 1212 slide uniformly within the respective syringes 1211 in a direction adjacent to the inlet and outlet ports 1213. A plurality of different kinds of microdroplets 199 can be simultaneously generated.
- the number of the ejector head 110, the variable volume unit 121, and the three-way directional control valve 124 is the same and plural.
- the inlet end 111 of each of the ejector tips 110 is in communication with a first interface of a three-way directional valve 124 via a separate capillary tube 123.
- the inlet and outlet ports 1213 of each variable volume assembly 121 are respectively in communication with a second interface of a three-way switching valve 124 via separate thin tubes 123.
- the third port of each three-way reversing valve 124 is in communication with the reservoir 125, respectively.
- the liquid storage tanks 125 may be one or more.
- the first liquid 190 in each of the ejector tips 110 may be the same or different.
- the plurality of variable volume assemblies 121 are arranged side by side or in other forms. Each variable volume component 121 corresponds to a separate power component 122, respectively. Driven by the power assembly 122, the plurality of push rods 1212 slide uniformly within the respective syringes 1211 in a direction adjacent to the inlet and outlet ports 1213. Not only can a plurality of different kinds of micro-droplets 199 be simultaneously generated, but also the volume size of each of the droplets 195 can be separately controlled under the premise that the volume of the micro-droplets 199 generated by each of the ejector tips 110 is uniform. It is convenient to independently control the generation state of the micro droplets 199 of the plurality of ejection heads 110.
- microdroplets using the spit gun injection/ejection method because the conventional motion control mechanism cannot accurately control the relative motion between the outlet end of the spit gun head and the oil phase composition.
- the problem of poor uniformity of the volume of the microdroplets provides a motion control mechanism capable of accurately controlling the relative motion between the outlet end of the ejector tip and the oil phase composition.
- the outlet end 112 of the ejector tip 110 performs a periodic motion including instantaneous acceleration, which not only can efficiently generate the micro-droplets 199, but also facilitates controlling the size of the generated micro-droplets 199. .
- the outlet end 112 of the ejector tip 110 is periodically displaced in a sinusoidal variation, and the micro-droplets 199 cannot be efficiently generated, and the generated micro-droplets 199 have good volume-size uniformity.
- the outlet end 112 of the ejector tip 110 is driven by the motion control mechanism 130 to perform a periodic motion comprising a transient acceleration or a periodic motion with a sinusoidal change in displacement.
- the present application provides a motion control mechanism 130 including a support frame 131, a connector 132, and a drive element.
- the connector 132 is for connection to the ejector head 110.
- the drive member is fixed to the support frame 131, and the drive member is drivingly coupled to the connector 132.
- the outlet end 112 of the ejector tip 110 is oscillated with a sinusoidal change or a square wave change in velocity.
- the motion control mechanism 130 provided by the present application generates a micro-droplet 199 by generating a sinusoidal change or a square wave-varying vibration at the outlet end 112 of the ejector head 110, and has a high efficiency of generating the micro-droplet 199. Mention the advantages of high uniformity.
- the motion control mechanism 130 in the present application may also employ other rotary driving devices such as a swing cylinder, a rotating electromagnet 137, and the like.
- the driving element includes a vibration motor 133.
- the type of the vibration motor 133 is a galvanometer motor, and an output shaft of the galvanometer motor is drivingly coupled to the connecting member 132.
- the galvanometer motor can provide stable and high-speed reciprocating swing and reciprocating linear motion, and the swing and frequency can be set as required, which greatly improves the applicable range of the motion control mechanism 130 of the present application.
- the rotating electrical machine can also be a voice coil motor or a piezoelectric motor.
- the vibration motor 133 adopts a motor having a closed-loop control vibration angle or position, and the output end of the motor-driven ejector head 110 is controlled by a closed-loop control vibration angle or position, thereby precisely controlling the oscillating trajectory of the ejector head 110. This further reduces the disturbances caused by the environment and the system.
- the motor that controls the vibration angle or position in a closed loop includes components such as an infrared position sensor, a control circuit, and a signal processing circuit.
- an infrared position sensor is mounted on the rotating shaft of the motion control mechanism 130, and the position signal obtained by the infrared position sensor is fed back to the control circuit, and the control circuit separately responds to the position signal according to the PID automatic control principle.
- the proportional, integral, and differential operation processes are combined, and the signal processing circuits such as position feedforward, speed loop, and current loop are combined to achieve accurate position control of the motor during motion.
- the use of a closed-loop control of the vibration angle or position of the motor can prevent other vibration motors 133 from being subjected to complex load environment changes resulting in changes in the vibration position, which facilitates engineering precision control of the volume 175 volume and generation speed.
- the connector 132 includes a joint 1321.
- the joint 1321 is drivingly coupled to the output shaft of the vibration motor 133.
- the joint 1321 has a hollow tubular shape, one end of the joint 1321 is for connection with the ejector head 110, and the other end of the joint 1321 is for connection with the fluid control mechanism of the ejector head 110.
- the first liquid 190 for generating the micro-droplets 199 is stored in the ejector tip 110.
- the function of the fluid control mechanism is to set the first liquid 190 in the ejector head 110 during the generation of the micro-droplets 199.
- the flow rate is discharged.
- the first liquid 190 stored in the ejector tip 110 is discharged at a constant flow rate, or the flow rate exhibits a regular change, or a flow rate set by other classes.
- the first liquid 190 in the ejector head 110 is discharged from the outlet end 112 of the squirt head 110 at a constant flow rate under the control of the fluid control mechanism.
- the thin tube 123 of the fluid control mechanism is connected to the end of the joint 1321 away from the ejection head 110.
- the joint 1321 can simultaneously function to communicate the ejection head 110 and the fluid control mechanism and to drive the ejection head 110.
- the connector 1321 is coaxial with the ejector head 110.
- the connecting member 132 includes a connecting shaft 1322.
- the connecting shaft 1322 is rotatably disposed on the supporting frame 131.
- the connecting shaft 1322 is drivingly connected to the vibration motor 133.
- the number of the joints 1321 is plural, and the plurality of joints 1321 are fixedly disposed on the connecting shaft 1322.
- a plurality of joints 1321 are mounted at intervals on one of the connecting shafts 1322.
- the plurality of joints 1321 can simultaneously mount a plurality of jetting heads 110, which greatly improves the efficiency of generating the droplets 199.
- the connecting shaft 1322 is rotatably disposed on the support frame 131, and the two ends of the connecting shaft 1322 are rotatably connected to the support frame 131 and the other positions of the connecting shaft 1322 are rotatably connected to the support frame 131.
- the two ends of the connecting shaft 1322 are rotatably disposed on the support frame 131.
- One end of the connecting shaft 1322 is drivingly connected to the vibration motor 133, and a plurality of joints 1321 are fixedly disposed between the two ends of the connecting shaft 1322.
- the two ends of the connecting shaft 1322 are rotatably disposed on the support member, which is advantageous for increasing the rotational stability of the entire rotating shaft.
- both ends of the connecting shaft 1322 are rotatably disposed on the support frame 131 by the rotating bearing.
- other positions of the connecting shaft 1322 may be rotationally disposed on the support frame 131 under the condition that the rotation and the transmission are satisfied.
- the angle between the axial direction of the joint 1321 and the axial direction of the connecting shaft 1322 can change the movement trajectory and the moving speed of the outlet end 112 of the ejector head 110.
- the axial direction of the joint 1321 and the axial direction of the connecting shaft 1322 are perpendicular to each other.
- the axial direction of the joint 1321 and the axial direction of the connecting shaft 1322 are kept perpendicular to each other, which facilitates the spitting gun head 110 to fully utilize the rotation of the connecting shaft 1322 to achieve its own vibration.
- a plurality of joints 1321 are equally spaced between the ends of the connecting shaft 1322.
- the sprinkler heads 110 arranged at equal intervals are uniformly disturbing the second liquid 699 during the vibration of the liquid level of the second liquid 699 to ensure that the environment and conditions for generating the micro-droplets 199 by the respective ejector heads 110 are the same.
- the driving element includes a piezoelectric ceramic 135 and an elastic member 136.
- the piezoelectric ceramic 135 When the piezoelectric ceramic 135 is energized to generate a deformation in the first direction, the joint 1321 of the driving connector 132 moves in the first direction and is connected to the connecting member 132.
- the elastic member 136 is elastically deformed.
- the piezoelectric ceramic 135 When the piezoelectric ceramic 135 is energized to produce a deformation opposite to the first direction, the elastic deformation of the elastic member 136 is restored while the joint 1321 of the connecting member 132 is moved in a direction opposite to the first direction. In this way, the connecting member 132 drives the outlet end 112 of the ejector head 110 to perform a sinusoidal change in displacement or a square wave change in velocity.
- the outlet end 112 of the ejector head 110 is piezoelectrically oscillated as a circular arc, a sinusoidal displacement, or a square wave change in velocity.
- the joint 1321 is rotatably disposed on the support frame 131 by a bearing, and the ejector head 110 is sleeved at one end of the joint 1321.
- the ejector head 110 can perform a circular arc motion with the center of the bearing as a midpoint.
- the joint 1321 is rotatably coupled to the support frame 131 at a position having a symmetrical extension plate 134 extending in a direction perpendicular to the direction in which the joint 1321 extends.
- the driving element includes a piezoelectric ceramic 135 and an elastic member 136, and the piezoelectric ceramic 135 and the elastic member 136 cooperate with the driving connector 132.
- the piezoelectric ceramic 135 and the elastic member 136 drive the extension plate 134 to thereby achieve rapid vibration of the outlet end 112 of the ejection head 110.
- the piezoelectric method has the advantages of simple structure and stable driving performance.
- the driving component includes an electromagnet 137, a magnetic member 138, and an elastic member 136.
- One end of the elastic member 136 is fixedly disposed on the support frame 131, and the connecting member 132 is fixedly disposed at the other end of the elastic member 136. It is fixedly coupled to the joint 1321 of the connector 132.
- the electromagnet 137 is energized to generate a force in the first direction to the magnetic member 138, the magnetic member 138 and the joint 1321 of the connector 132 move in the first direction while the elastic member 136 is elastically deformed.
- the elastic member 136 drives the joint 1321 and the magnetic member 138 of the connecting member 132 to move in a direction opposite to the first direction.
- the electromagnet 137 is controlled to be turned off and on, and the magnetic member 138 drives the outlet end 112 of the ejection head 110 through the connecting member 132 to perform a sinusoidal change in displacement or a square wave change in velocity.
- the outlet end 112 of the ejector head 110 is electromagnetically oscillated as a circular arc, a sinusoidal displacement, or a square wave change in velocity.
- the trajectory of the exit end 112 of the ejector head 110 is close to the horizontal section of the plane arc.
- One end of the elastic member 136 is fixed to the support frame 131, and the other end of the elastic member 136 is fixedly connected to the joint 1321.
- the spit gun head 110 is sleeved at one end of the joint 1321.
- the driving element includes an electromagnet 137 and a magnetic member 138.
- the magnetic member 138 is fixedly coupled to the connecting member 132, and the electromagnet 137 drives the connecting member 132 through the magnetic member 138.
- the electromagnet 137 is fixedly disposed on the support frame 131, and the magnetic member 138 that can be attracted by the electromagnet 137 is fixedly disposed on the joint 1321 and kept within the working distance range from the electromagnet 137.
- the position sensor is capable of detecting the position of movement of the magnetic member 138, and the position of the outlet end 112 of the ejector head 110 can be derived by calculation.
- the electromagnet 137 When the electromagnet 137 is energized, the magnetic member 138 is attracted and the ejection head 110 is moved in the direction of approaching the electromagnet 137, and the elastic member 136 is stored by elastic deformation.
- the electromagnet 137 When the outlet end 112 of the ejector tip 110 moves closer to the electromagnet 137 to the first set position, the electromagnet 137 is de-energized. The ejector tip 110 is moved away from the electromagnet 137 by the restoring force of the elastic member 136.
- the electromagnet 137 When the outlet end 112 of the ejector tip 110 moves away from the electromagnet 137 to the second set position, the electromagnet 137 is energized.
- the electromagnet 137 attracts the magnetic member 138 and causes the ejection head 110 to move in the direction of approaching the electromagnet 137, while the elastic member 136 is stored by elastic deformation, and thus circulates.
- the operating parameters of the electromagnet 137 and the elastic modulus of the elastic member 136 can be adjusted according to specific working conditions to achieve a vibration in which the outlet end 112 of the ejection head 110 is sinusoidally changed or the square wave is changed in speed.
- the resilient member 136 includes an elastic steel sheet and other resilient members 136 that meet elastic requirements.
- the outlet end 112 of the ejector head 110 is electromagnetically oscillated as a circular arc, a sinusoidal displacement, or a square wave change in velocity.
- the trajectory of the exit end 112 of the ejector head 110 is close to the vertical section of the plane arc.
- One end of the elastic member 136 is fixed to the support frame 131, and the other end of the elastic member 136 is fixedly connected to the joint 1321.
- the spit gun head 110 is sleeved at one end of the joint 1321.
- the electromagnet 137 is fixedly disposed on the support frame 131, and the magnetic member 138 that can be attracted by the electromagnet 137 is fixedly disposed on the joint 1321 and held within the working distance range from the electromagnet 137.
- the position sensor is capable of detecting the position of movement of the magnetic member 138, and the position of the outlet end 112 of the ejector head 110 can be derived by calculation.
- the electromagnet 137 When the outlet end 112 of the ejector tip 110 moves closer to the electromagnet 137 to the first set position, the electromagnet 137 is de-energized. The ejector tip 110 is moved away from the electromagnet 137 by the restoring force of the elastic member 136. When the outlet end 112 of the ejector tip 110 moves away from the electromagnet 137 to the second set position, the electromagnet 137 is energized. The electromagnet 137 attracts the magnetic member 138 and causes the ejection head 110 to move in the direction of approaching the electromagnet 137, while the elastic member 136 is stored by elastic deformation, and thus circulates.
- the operating parameters of the electromagnet 137 and the elastic modulus of the elastic member 136 can be adjusted according to specific working conditions to achieve a vibration in which the outlet end 112 of the ejection head 110 is sinusoidally changed or the square wave is changed in speed.
- the resilient member 136 includes an elastic steel sheet and other resilient members 136 that meet elastic requirements.
- the driving element includes an electromagnet 137 and a magnetic member 138.
- the magnetic member 137 is fixedly coupled to the connector 1321 of the connector 132.
- the electromagnet 137 generates a varying magnetic field, and the magnetic member 138 moves in a varying magnetic field.
- the magnetic member 137 drives the outlet end 112 of the ejection head 110 through the connecting member 132 to perform a sinusoidal change in displacement or a square wave change in velocity.
- the electromagnet 137 is used to realize the vibration of the outlet end 112 of the ejector head 110 as a circular arc, a sinusoidal displacement, or a square wave change in velocity.
- the joint 1321 is rotatably disposed on the support frame 131 by a bearing, and the ejector head 110 is sleeved at one end of the joint 1321.
- the electromagnet 137 is fixedly disposed on the support frame 131, and the magnetic member 138 that can be attracted by the electromagnet 137 is fixedly disposed on the joint 1321 and held within the working distance range from the electromagnet 137.
- the position sensor is capable of detecting the angle of rotation of the joint 1321, and the position of the outlet end 112 of the ejector head 110 can be calculated by calculation.
- the electromagnet 137 When the electromagnet 137 is energized, the magnetic member 138 is attracted and the ejection head 110 is moved toward the electromagnet 137.
- the electromagnetic Iron 137 switches the direction of energization. The ejector tip 110 is moved away from the electromagnet 137 by the opposing force of the electromagnet 137.
- the electromagnet 137 switches the energization direction again.
- the electromagnet 137 attracts the magnetic member 138 and causes the ejection head 110 to move in the direction of approaching the electromagnet 137, thus circulating.
- the operating parameters of the electromagnet 137 can be adjusted according to the specific working conditions to realize the vibration in which the displacement end 112 of the ejection head 110 is sinusoidal or the square wave is changed.
- the above embodiment shows the vibration of the vibration motor 133 output rotation, the outlet end 112 of the ejection head 110 as a circular arc, the displacement being sinusoidal, or the speed being square wave.
- the outlet end 112 of the ejector head 110 can also be oscillated as a straight line, with a sinusoidal change in displacement or a square wave change in velocity.
- the electromagnet 137 is used to realize the vibration of the outlet end 112 of the ejection head 110 as a straight line, a sinusoidal displacement, or a square wave change in velocity.
- the outlet end 112 of the ejector head 110 makes a straight line of vibration in the horizontal plane.
- the joint 1321 is slidably disposed on the support frame 131 by a linear bearing, and the discharge gun head 110 is sleeved at one end of the joint 1321.
- the electromagnet 137 is fixedly disposed on the support frame 131, and the magnetic member 138 that can be attracted by the electromagnet 137 is fixedly disposed on the joint 1321 and held within the working distance range from the electromagnet 137.
- the position sensor is capable of detecting the sliding position of the joint 1321, and the position of the outlet end 112 of the ejector head 110 can be calculated by calculation.
- the electromagnet 137 is energized, the magnetic member 138 is attracted to drive the ejection head 110 to slide in the direction of approaching the electromagnet 137.
- the electromagnetic Iron 137 switches the direction of energization.
- the ejector tip 110 slides away from the electromagnet 137 by the opposing force of the electromagnet 137.
- the electromagnet 137 switches the energization direction again.
- the electromagnet 137 attracts the magnetic member 138 and causes the ejection head 110 to slide in the direction of approaching the electromagnet 137, thus circulating.
- the operating parameters of the electromagnet 137 can be adjusted according to the specific working conditions to realize the vibration in which the displacement end 112 of the ejection head 110 is sinusoidal or the square wave is changed.
- the electromagnet 137 is used to realize the vibration of the outlet end 112 of the ejection head 110 as a straight line, a sinusoidal displacement, or a square wave change in velocity.
- the outlet end 112 of the ejector head 110 makes a straight line of vibration in the vertical plane.
- the joint 1321 is slidably disposed on the support frame 131 by a linear bearing, and the discharge gun head 110 is sleeved at one end of the joint 1321.
- the electromagnet 137 is fixedly disposed on the support frame 131, and the magnetic member 138 that can be attracted by the electromagnet 137 is fixedly disposed on the joint 1321 and held within the working distance range from the electromagnet 137.
- the position sensor is capable of detecting the sliding position of the joint 1321, and the position of the outlet end 112 of the ejector head 110 can be calculated by calculation.
- the electromagnet 137 is energized, the magnetic member 138 is attracted to drive the ejection head 110 to slide in the direction of approaching the electromagnet 137.
- the electromagnetic Iron 137 switches the direction of energization.
- the ejector tip 110 slides away from the electromagnet 137 by the opposing force of the electromagnet 137.
- the electromagnet 137 switches the energization direction again.
- the electromagnet 137 attracts the magnetic member 138 and causes the ejection head 110 to slide in the direction of approaching the electromagnet 137, thus circulating.
- the operating parameters of the electromagnet 137 can be adjusted according to the specific working conditions to realize the vibration in which the displacement end 112 of the ejection head 110 is sinusoidal or the square wave is changed.
- the galvanometer motor is capable of outputting a reciprocating linear motion.
- the ventilator motor drives the outlet end 112 of the ejector head 110 to make a trajectory that is straight, with a sinusoidal change in displacement or a square wave change in velocity.
- the galvanometer motor is capable of outputting a reciprocating linear motion.
- the pulsator motor drives the outlet end 112 of the ejector head 110 to make a trajectory that is straight, with a sinusoidal change in displacement or a square wave change in velocity.
- micro-droplet generating device and the generating method provided by the present application are widely used in medical clinical testing, nano material preparation, food and environmental testing, biochemical analysis and the like.
- the device for generating microdroplets 199 and the method for generating the same are applied in a polymerase chain reaction (PCR).
- PCR polymerase chain reaction
- the present application provides a fluid drive mechanism 120 for controlling the discharge of the third liquid 820 at the outlet end of the first discharge gun head 830 during the generation of the microdroplets by the microdroplet generation system. Flow rate and flow rate.
- the fluid drive mechanism 120 provided by the present application includes a housing 100, a first variable volume assembly 200, and a linear motor assembly 300.
- the housing 100 of the fluid drive mechanism 120 also functions as a support
- the first variable volume assembly 200 is the execution portion of the fluid drive process
- the linear motor assembly 300 is the drive portion of the fluid drive process
- the first variable volume assembly 200 and the straight line Motor assemblies 300 are each mounted within housing 100.
- the first variable volume assembly 200 includes a first syringe 201 and a first push rod 202.
- the outer wall of the first syringe 201 is fixedly mounted on the inner wall of the housing 100, and the first push rod 202 is slidably engaged with the inner wall of the first syringe 201. That is, the first push rod 202 is slidably mounted in the first syringe 201.
- the first syringe 201 can store the first driving liquid 810, and the first syringe 201 has an inlet and outlet port, and the inlet and outlet ports can communicate with the inlet end of the first ejector head 830, and the first ejector head 830 is inside.
- a third liquid 820 is stored.
- the output end of the linear motor assembly 300 is drivingly coupled to the first push rod 202 for driving the first push rod 202 to slide in the extending direction of the first syringe 201.
- the output end of the linear motor assembly 300 drives the first push rod 202 to squeeze the first driving liquid 810 stored in the first syringe 201, and the squeezed first driving liquid 810 is squeezed.
- the third liquid 820 stored in the first ejector head 830 is pressurized, and finally the third liquid 820 is discharged from the outlet end of the first ejector head 830.
- the flow rate and flow rate at which the third liquid 820 exits the first ejector head 830 depends on the state of motion of the output end of the linear motor assembly 300.
- the fluid drive mechanism 120 utilizes the incompressibility of the first driving liquid 810 to ensure that the outlet end of the first ejector head 830 can still move the third liquid 820 from the first at a set flow rate and flow rate when vibrating at a high frequency.
- the outlet end of the ejector head 830 is discharged.
- the linear motor assembly 300 not only has high motion accuracy, but also can conveniently adjust the magnitude of the current according to the actual working conditions such as the liquid discharge speed and the discharge pressure to ensure that the first push rod 202 slides or slides the set distance according to the set speed.
- the third liquid 820 is discharged from the outlet end of the first ejector head 830 precisely at a set flow rate and flow rate.
- the fluid drive mechanism 120 provided herein is capable of accurately controlling the volumetric volume of the generated microdroplets.
- the first syringe 201 in the present application may be straight or bent, and the inlet and outlet ports on the first syringe 201 may be opened at one end or intermediate position of the first syringe 201, and the present application does not limit the first.
- the specific structure of the syringe 201, the first push rod 202, and the specific positional relationship therebetween For convenience of description, as shown in FIG. 41 and FIG. 42 , the present application takes a straight cylindrical first syringe 201 as an example, and the inlet and outlet ports are opened at one end of the first syringe 201 and are slidably mounted in the first syringe 201.
- the first push rod 202 passes through the other end of the first syringe 201.
- the first variable volume component 200 can also be any structural form capable of realizing a variable volume function.
- the linear motor assembly 300 includes a voice coil motor 301, and the primary 311 of the voice coil motor 301 is fixedly mounted on the inner wall of the housing 100, and the secondary of the voice coil motor 301
- the 312 is fixedly coupled to the first push rod 202 in the sliding direction of the first push rod 202.
- the voice coil motor 301 not only has the advantages of fast response, high speed, and high acceleration, but also has a simple structure, a small volume, and convenient control.
- the secondary 312 of the voice coil motor 301 can maintain the set sliding speed while the sliding resistance increases or decreases by the magnitude of the control current, thereby being able to conveniently maintain the set pressure when the discharge pressure of the third liquid 820 changes.
- the voice coil motor 301 can also operate in a mode such as a set sliding position, a set sliding speed, or a set driving pressure value according to actual working conditions, thereby accurately implementing the third liquid 820 according to the setting by the first variable volume assembly 200.
- the first discharge head 830 is discharged in a volume, the first discharge head 830 is discharged at a set flow rate, or the first discharge head 830 is discharged in accordance with a set discharge pressure.
- the voice coil motor 301 is disposed on one side of the first syringe 201, and the sliding direction of the secondary 312 in the voice coil motor 301 and the first push rod 202 are in the first syringe 201.
- the sliding direction is parallel, and the secondary 312 of the voice coil motor 301 is drivingly coupled to the first push rod 202.
- the linear motor assembly 300 further includes a connecting plate 302. One end of the connecting plate 302 is fixedly connected to the secondary 312 of the voice coil motor 301, and the other end of the connecting plate 302 is The first push rod 202 is fixedly connected at one end of the first syringe 201.
- the connecting plate 302 is movably disposed in the housing 100, and the connecting plate 302 slides synchronously with the secondary 312 of the voice coil motor 301, and the secondary 312 of the voice coil motor 301 drives the first push rod 202 through the connecting plate 302.
- the slide is synchronized in the first syringe 201.
- the sliding direction of the secondary 312 in the voice coil motor 301 can also be disposed coaxially, vertically, or otherwise achievable with the sliding direction of the first push rod 202.
- the secondary 312 of the voice coil motor 301 includes a bobbin 3121 and a coil 3122.
- the coil 3122 is wrapped around the bobbin 3121, and the bobbin 3121 is integrally formed with the connecting plate 302.
- the integrally formed skeleton 3121 and the connecting plate 302 further eliminate the motion error between the secondary 312 of the voice coil motor 301 and the first push rod 202, ensuring that the first push rod 202 and the secondary 312 of the voice coil motor 301 move synchronously. Precision.
- the connection between the secondary 312 of the voice coil motor 301 and the connecting plate 302 may also be a fixed connection by a connector such as a screw or a snap.
- the present application does not limit the connection between the secondary 312 of the voice coil motor 301 and the connecting plate 302, as long as the secondary 312 of the voice coil motor 301 can be driven to slide the first push rod 202 synchronously through the connecting plate 302.
- the linear motor assembly 300 further includes a guide member 303.
- the guide member 303 includes a guide rail and a slider.
- the guide rail is fixedly disposed in the housing 100, and the extending direction of the guide rail is The sliding direction of the first push rod 202 is parallel, the slider is slidably disposed on the guide rail, and the slider is fixedly connected to the connecting plate 302.
- the guide member 303 plays a guiding role during the sliding process of the connecting plate 302 to ensure that the secondary 312 of the voice coil motor 301 drives the first push rod 202 to stabilize the sliding process through the connecting plate 302, thereby implementing the third liquid 820 according to the third liquid 820.
- the linear motor assembly 300 further includes a displacement sensor, the displacement sensor is disposed in the housing 100, and the displacement sensor is electrically connected to the voice coil motor 301.
- the displacement sensor is used to measure the sliding position of the voice coil secondary 312, the connecting plate 302, and the first push rod 202, the sliding speed, and the like, and the displacement sensor is electrically connected to the voice coil motor 301 to implement closed loop control of the voice coil motor 301.
- the above displacement sensor comprises a grating type, a magnetic grid type, a resistive type or a differential transformer type (LVDT) displacement sensor.
- the displacement sensor is a photoelectric linear displacement sensor.
- the voice coil motor 301 itself is a servo motor, and the closed loop control system of the voice coil motor 301 is integrated inside the voice coil motor 301 to further reduce the volume of the fluid drive mechanism 120 provided by the present application.
- the voice coil motor 301 includes a primary 311 and a secondary 312.
- the primary 311 includes a first pair of magnets 3111 and a second pair of magnets 3112, the first pair of magnets 3111 and the second pair of magnets 3112 being sequentially disposed in the housing 100 along the sliding direction of the secondary 312, two of the first pair of magnets 3111
- the magnetic poles of the block magnets are oppositely disposed, and the magnetic poles of the two magnets of the second pair of magnets 3112 are oppositely disposed, and the magnetic line between the first pair of magnets 3111 and the second pair of magnets 3112 are magnetically sensed. The opposite direction.
- the secondary 312 includes a bobbin 3121 and a coil 3122.
- the coil 3122 is wound around a bobbin 3121.
- the coil 3122 has a first segment 3125 and a second segment 3126 with opposite current directions after energization.
- the first segment 3125 of the coil 3122 is The first pair of magnets 3111 slide between and the second segment 3126 of the coil 3122 slides between the second pair of magnets 3112.
- the two pairs of magnets and the coil 3122 can simultaneously generate the same direction and the same magnitude of the sensing force in the first segment 3125 and the second segment 3126 of the coil 3122, facilitating the rapid action of the secondary 312 in the voice coil motor 301, and improving the voice coil motor.
- the sensitivity of 301 The sensitivity of 301.
- the first pair of magnets 3111 and the second pair of magnets 3112 are both rectangular plate-shaped magnets, and the first pair of magnets 3111 and the second pair of magnets 3112 are fixedly mounted on The inner wall of the housing 100.
- the skeleton 3121 has a hollow rounded rectangle, and an annular groove having a rounded rectangular shape is formed on one end surface of the skeleton 3121, and a coil 3122 having a hollow rounded rectangular shape is fixedly mounted in the annular groove of the skeleton 3121.
- the first segment 3125 and the second segment 3126 simultaneously generate the same inductive force of the same direction and the same size. Since the first pair of magnets 3111 and the second pair of magnets 3112 are both fixed, the coil 3122 after the energization is induced. The direction of the force slides, and the skeleton 3121 fixed to the coil 3122 moves in synchronization with the coil 3122. Further, the secondary 312 of the voice coil motor 301 drives the first push rod 202 to move synchronously through the connecting plate 302.
- the displacement sensor When the displacement sensor detects that the connecting plate 302 sliding in synchronization with the first push rod 202 slides to the set position, the displacement sensor sends a signal, the voice coil motor 301 is powered off, and the secondary 312 of the voice coil motor 301 stops sliding.
- the displacement sensor detects that the sliding speed of the connecting plate 302 sliding synchronously with the first push rod 202 slightly fluctuates, the displacement sensor sends a signal, and the current flowing into the voice coil motor 301 is adjusted accordingly to ensure the voice coil motor 301.
- the secondary 312 drives the first push rod 202 to slide at the set speed through the connecting plate 302, so that the third liquid 820 is discharged to the first liquid discharge gun head 830 according to the set flow rate to generate uniform droplets of uniform size.
- the voice coil motor 301 can also be of other types of construction.
- the housing 100 includes an opposite first mounting end surface 141 and a second mounting end surface 143.
- the first mounting end surface 141 and the second mounting end surface 143 are respectively provided with a first mounting hole 142 and a first mounting hole 142.
- Two mounting holes 144, the first mounting holes 142 and the second mounting holes 144 are oppositely disposed.
- the primary 311 of the voice coil motor 301 further includes a first mounting plate 3114 and a second mounting plate 3115, and the first mounting plate 3114 and the second mounting plate 3115 are detachably fixed to the first mounting hole 142 and the second mounting hole 144, respectively.
- the voice coil motor 301 can be integrally removed from the housing 100 or the voice coil motor 301 can be integrally mounted to the housing 100 after assembly, which ensures the assembly precision of the voice coil motor 301 and improves the ease of assembly and disassembly of the voice coil motor 301. Sex. As an achievable manner, the first mounting hole 142 and the second mounting hole 144 are rounded rectangular holes.
- first mounting plate 3114 and the second mounting plate 3115 are rounded rectangular plates.
- the first mounting plate 3114 and the second mounting plate 3115 can be respectively fixed to the first mounting hole 142 and the second mounting hole 144 by screws.
- the opposite sides of the first mounting plate 3114 and the second mounting plate 3115 each have a rectangular groove for mounting the first pair of magnets 3111 and the second pair of magnets 3112, and the first pair of magnets 3111 and the second pair of magnets 3112 are mounted in the first pair of mountings.
- the housing 100 has a hollow rectangular parallelepiped shape, and the first variable volume assembly 200 of the fluid drive mechanism 120 and the linear motor assembly 300 are both mounted inside the housing 100.
- One end surface of the housing 100 is provided with a connection hole, and the plurality of housings 100 can be mounted side by side to the base body through the connection hole.
- the housing 100 has opposing top end faces 145 and bottom end faces 140 in the vertical direction of the space, the housing The extending direction of the first syringe 201 in 100 and the sliding direction of the secondary 312 in the voice coil motor 301 are both spatial vertical directions.
- the housing 100 has opposite side end faces 150 in a direction in which the first syringe 201 is directed to the voice coil motor 301, and the housing 100 has an opposite first mounting end face in a direction in which the first mounting plate 3114 is directed to the second mounting plate 3115. 141 and a second mounting end face 143.
- the first mounting end faces 141 and the second mounting end faces 143 of the plurality of housings 100 are sequentially fitted.
- the connecting holes on the housing 100 are opened on the same side end surface 150 of the housing 100 or the connecting holes on the housing 100 are respectively formed on the two side end faces 150.
- the housings 100 are each fixedly mounted to the base by screws that are threadedly coupled to the attachment holes.
- the housing 100 has a dimension of 18 mm in the direction of juxtaposition, meaning that the distance between the opposing first mounting end face 141 and the second mounting end face 143 on the housing 100 is 18 mm.
- the third liquid 820 can be simultaneously controlled to discharge the first liquid discharge gun head 830 at a set flow rate and flow rate in a plurality of reagent tanks having a pitch of 18 mm, thereby efficiently generating micro droplets.
- the distance between the plurality of fluid drive mechanisms 120 after the parallel installation may be other sizes as long as the spacing between the plurality of reagent tanks can be matched.
- the fluid drive method includes the following steps: the linear motor assembly 300 drives the first push rod 202 to be squeezed and stored in the first syringe 201.
- a driving liquid 810 the first driving liquid 810 presses the third liquid 820 stored in the first ejector head 830, and the third liquid 820 is discharged from the outlet end of the first ejector head 830.
- the fluid driving method utilizes the incompressibility of the first driving liquid 810 to ensure that the outlet end of the first ejector head 830 can still vent the third liquid 820 from the first at a set flow rate and flow rate when vibrating at a high frequency.
- the outlet end of the liquid gun head 830 is discharged.
- the first driving liquid 810 and the third liquid 820 are not mutually soluble, and there is no substance exchange between the two.
- the density of the first driving liquid 810 is smaller than the density of the third liquid 820.
- the first driving liquid 810 may be mineral oil or an alkane or the like.
- the third liquid 820 discharging the first ejector head 830 falls into the holding container containing the first driving liquid 810, and the third liquid 820 falling into the holding container is at the first The liquid 810 is driven to fall.
- the linear motor assembly 300 not only has high motion accuracy, but also can conveniently adjust the magnitude of the current according to the actual working conditions such as the liquid discharge speed and the discharge pressure to ensure that the first push rod 202 slides or slides the set distance according to the set speed. Further, the third liquid 820 is discharged from the outlet end of the first ejector head 830 precisely at a set flow rate and flow rate.
- the fluid driven method provided by the present application is capable of precisely controlling the volume of generated microdroplets.
- the fluid drive mechanism 120 further includes a reversing valve 400.
- the reversing valve 400 includes a reversing valve first interface 411 and a reversing valve second.
- the interface 412 and the reversing valve third interface 413, the reversing valve first interface 411, the reversing valve second interface 412 and the reversing valve third interface 413 are respectively capable of entering and exiting the inlet end of the first ejection head 830
- the port is in communication with a reservoir in which the first drive liquid 810 is stored.
- the reversing valve 400 When the reversing valve 400 is in operation, the reversing valve first port 411 and the reversing valve second port 412 can be connected, or the reversing valve 400 can be operated to communicate the reversing valve third port 413 and the reversing valve second port 412.
- the reversing valve 400 can control at least the fluid driving mechanism 120 to implement the following two modes: 1.
- the inlet and outlet ports of the first variable volume assembly 200 are communicated with the inlet end of the first discharge gun head 830, and the linear motor assembly 300 is Under the driving, the first variable volume assembly 200 provides a liquid driving force to the first ejector head 830 for discharging the third liquid 820 in the first ejector head 830 from the outlet end of the first ejector head 830.
- the third liquid 820 is drawn from the outlet end of the first ejector head 830 into the first squirt head 830.
- the inlet and outlet ports of the first variable volume assembly 200 are connected to the liquid storage tank. Under the driving of the linear motor assembly 300, the first variable volume assembly 200 draws the first driving liquid 810 in the liquid storage tank into the first Within the first syringe 201 of a variable volume assembly 200, or the drive fluid within the first variable volume assembly 200 is pushed into the reservoir.
- the reversing valve 400 includes a valve body 410 and a communication block 420.
- the valve body 410 includes a reversing valve first port 411, a reversing valve second port 412, and a reversing valve third port 413.
- the communication block 420 is provided with a first flow channel 421, a second flow channel 422, and a third flow channel 423 that are independent of each other. The first flow channel 421, the second flow channel 422, and the third flow channel 423 each pass through the communication block 420.
- One ends of the first flow path 421, the second flow path 422, and the third flow path 423 are respectively connected to the reversing valve first port 411, the reversing valve second port 412, and the reversing valve third port 413, and the first flow path 421,
- the other ends of the second flow path 422 and the third flow path 423 are respectively connected to the inlet end of the first ejection head 830, the inlet and outlet ports, and the reservoir in which the first driving liquid 810 is stored.
- the connecting block 420 having a plurality of flow paths is provided with the advantages of simple structure and stable communication. Further, the inner surfaces of the first flow channel 421, the second flow channel 422, and the third flow channel 423 are respectively polished and rounded. The inner surfaces of the first flow path 421, the second flow path 422, and the third flow path 423 have no dead angle, and can effectively prevent bubble residue and adsorption.
- the present application further provides another fluid drive method, including the following steps: (1) the reversing valve 400 makes the inlet and outlet ports of the first syringe 201 and The liquid storage tank is connected, and the first push rod 202 slides in the first injection cylinder 201 to change the volume of the first injection cylinder 201 to drive the first driving liquid 810 in the liquid storage tank. (2) the reversing valve 400 connects the inlet and outlet of the first syringe 201 to the inlet end of the first ejection head 830, and the first push rod 202 is driven by the linear motor assembly 300.
- the diverter valve 400 connects the inlet and outlet ports of the first syringe 201 to the inlet end of the first jetting head 830, and is driven by the linear motor assembly 300.
- a push rod 202 slides within the first syringe 201 to change the volume of the first syringe 201 to discharge the third liquid 820 stored in the first jetting head 830 at the set flow rate to the first jetting head. The exit end of the 830.
- the uniform motion of the linear motor assembly 300 further drives the first push rod 202 to slide at a uniform speed in the first syringe 201, and finally the first driving liquid 810 or the third liquid 820 is sucked at a uniform flow rate.
- the first syringe 201 is introduced or discharged from the first syringe 201 to ensure the stability of the entire microdroplet formation process and the uniformity of the generated droplet volume size.
- the housing 100 has a hollow rectangular parallelepiped shape, and the reversing valve 400 is fixedly mounted in the housing 100 at a position near the bottom end surface 140 and the one end surface 150.
- the variable volume assembly 200 is mounted above the communication block 420 in the diverter valve 400.
- the voice coil motor 301 is mounted on the side of the first variable volume assembly 200, and the secondary 312 of the voice coil motor 301 and the first variable volume assembly 200 are fixedly coupled by a connecting plate 302, and the guide member 303 is mounted in the housing 100.
- the loop motor 301 is between the first syringe 201 of the first variable volume assembly 200.
- the fluid drive mechanism 120 further includes a power interface 500 mounted on the top surface 145 of the housing 100.
- the power interface 500 is electrically connected to the voice coil motor 301, the reversing valve 400, and the displacement sensor.
- the power interface 500 can also be externally connected.
- the power supply is electrically connected to supply power to components within the fluid drive mechanism 120.
- PCR polymerase chain reaction
- first feature "on” or “below” the second feature may be a direct contact of the first feature and the second feature, or the first and second features are indirectly contacted by an intermediate medium, unless otherwise explicitly stated and defined.
- first feature “above”, “above” and “above” the second feature may be that the first feature is directly above or above the second feature, or merely that the first feature level is higher than the second feature.
- first feature “below”, “below” and “below” the second feature may be that the first feature is directly below or obliquely below the second feature, or merely that the first feature level is less than the second feature.
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Abstract
Description
通电电压 | 12V | 通电时间 | 30s |
脉冲频率 | 60HZ | 电解温度 | 50℃ |
通电电流 | <1A/cm 2 | 电解液 | 50%-60%磷酸 |
Claims (82)
- 一种吐液枪头,包括具有中空腔体的针梗(113)及设置于所述针梗(113)一端的出口端(112);所述吐液枪头的出口端(112)端面的法线与所述针梗(113)的延伸方向之间的夹角小于等于90°。
- 根据权利要求1所述的吐液枪头,其特征在于,所述吐液枪头呈直管状,所述吐液枪头的出口端(112)为斜切结构。
- 根据权利要求1所述的吐液枪头,其特征在于,所述针梗(113)靠近所述吐液枪头的出口端(112)的部分包括弯折结构。
- 根据权利要求3所述的吐液枪头,其特征在于,所述针梗(113)靠近所述吐液枪头的出口端(112)的弯折结构具有过渡圆弧段。
- 根据权利要求1-4任一项所述的吐液枪头,其特征在于,还包括针栓(114),所述针栓(114)具有沿所述针栓(114)的延伸方向贯通所述针栓(114)的储液槽(115);所述储液槽(115)的一端与所述针梗(113)远离所述吐液枪头的出口端(112)的一端连通,所述针栓(114)远离所述针梗(113)的一端是所述吐液枪头的入口端(111)。
- 根据权利要求5所述的吐液枪头,其特征在于,所述针栓(114)远离所述针梗(113)的一端内表面开设有卡槽(116)。
- 根据权利要求1-4任一项所述的吐液枪头,其特征在于,所述吐液枪头的出口端(112)端面的法线与所述针梗(113)的延伸方向之间的夹角介于15°-75°之间。
- 根据权利要求7所述的吐液枪头,其特征在于,所述吐液枪头的出口端(112)端面的法线与所述针梗(113)的延伸方向之间的夹角介于30°-60°之间。
- 根据权利要求8所述的吐液枪头,其特征在于,所述吐液枪头的出口端(112)端面的法线与所述针梗(113)的延伸方向之间的夹角为45°。
- 一种微液滴生成装置,其特征在于,包括流体驱动机构(120)、运动控制机构(130)及权利要求1-9任一项所述的吐液枪头;所述吐液枪头的内部储存有第一液体,所述吐液枪头具有出口端(112)及入口端(111);所述流体驱动机构(120)与所述吐液枪头的入口端(111)连接,用于将储存在所述吐液枪头内部的第一液体从所述吐液枪头的出口端(112)排出;所述运动控制机构用于控制所述吐液枪头的出口端(112)在第二液体的液面下产生设定轨迹或设定速度或设定加速度的运动,以使排出所述吐液枪头的出口端(112)的第一液体克服表面张力及附着力在第二液体内形成微液滴。
- 一种微液滴生成方法,其特征在于,采用权利要求1-9任一项所述的吐液枪头,所述吐液枪头内储存有第一液体,提供储存有第二液体的微液滴容器(60);控制第一液体从所述吐液枪头的出口端(112)匀速排出;控制所述吐液枪头的出口端(112)在第二液体的液面下沿所述针梗(113)的延伸方向做速度大小呈方波变化的周期运动;所述吐液枪头的出口端(112)周期运动的前半周期与后半周期内,所述吐液枪头的出口端(112)的速度大小相同,方向相反;第一液体与第二液体为任意互不相溶的两种液体或具有界面反应的两种液体。
- 一种微液滴生成方法,其特征在于,采用权利要求1-9任一项所述的吐液枪头,所述吐液枪头内储存有第一液体,提供储存有第二液体的微液滴容器(60);控制第一液体从所述吐液枪头的出口端(112)匀速排出;控制所述吐液枪头的的出口端(112)在第二液体内部沿所述针梗(113)的延伸方向做位移呈正弦变化的周期运动;第一液体与第二液体为任意互不相溶的两种液体或具有界面反应的两种液体。
- 一种运动控制机构,包括:支撑架(131);连接件(132),用于与吐液枪头(110)连接;驱动元件,固定于所述支撑架(131),所述驱动元件与所述连接件(132)传动连接;在所述驱动元件的驱动下,所述吐液枪头(110)的出口端做位移呈正弦变化或者速度呈方波变化的运动。
- 根据权利要求13所述的运动控制机构,其特征在于,所述驱动元件包括振动电机(133),所述振动电机(133)的输出轴与所述连接件(132)传动连接。
- 根据权利要求13所述的运动控制机构,其特征在于,所述连接件(132)包括接头(1321),所述接头(1321)与所述振动电机(133)的输出轴传动连接,所述接头(1321)呈中空管状,所述接头(1321)的一端用于与所述吐液枪头(110)连接,所述接头(1321)的另一端用于与所述吐液枪头(110)的流体控制机构连接。
- 根据权利要求15所述的运动控制机构,其特征在于,所述接头(1321)靠近所述吐液枪头(110)的一端外缘呈倒圆台状,所述吐液枪头(110)套设于所述接头(1321)呈倒圆台状的一端。
- 根据权利要求15所述的运动控制机构,其特征在于,所述连接件(132)包括连接轴(1322),所述连接轴(1322)转动设置于所述支撑架(131),所述连接轴(1322)与所述振动电机(133)传动连接,所述接头(1321)的数量是多个,多个所述接头(1321)间隔固定设置于所述连接轴(1322)。
- 根据权利要求17所述的运动控制机构,其特征在于,所述连接轴(1322)的两端转动设置于所述支撑架(131),所述连接轴(1322)的一端与所述振动电机(133)传动连接,多个所述接头(1321)固定设置于所述连接轴(1322)的两端之间。
- 根据权利要求18所述的运动控制机构,其特征在于,所述接头(1321)的轴向与所述连接轴(1322)的轴向相互垂直。
- 根据权利要求18所述的运动控制机构,其特征在于,多个所述接头(1321)等间距间隔设置在所述连接轴(1322)的两端之间。
- 根据权利要求13所述的运动控制机构,其特征在于,所述驱动元件包括压电陶瓷(135)和弹性件(136),所述压电陶瓷(135)通电产生第一方向的变形时驱动所述连接件(132)向第一方向运动,与所述连接件(132)连接的所述弹性件(136)产生弹性变形;所述压电陶瓷(135)通电产生与第一方向相反的变形时,所述弹性件(136)的弹性变形恢复同时带动所述连接件(132)向与第一方向相反的方向运动;如此反复,所述 连接件(132)带动吐液枪头的出口端做位移呈正弦变化或者速度呈方波变化的运动。
- 根据权利要求13所述的运动控制机构,其特征在于,所述驱动元件包括电磁铁(137)和磁性件(138),所述磁性件(138)与所述连接件(132)固定连接,所述电磁铁(137)产生变化的磁场,所述磁性件(138)在变化的磁场中运动;所述磁性件(138)通过所述连接件(132)带动吐液枪头的出口端做位移呈正弦变化或者速度呈方波变化的运动。
- 根据权利要求22所述的运动控制机构,其特征在于,所述驱动元件包括还包括弹性件(136),所述弹性件(136)的一端固定设置于所述支撑架(131),所述连接件(132)固定设置于所述弹性件(136)的另一端,所述磁性件(138)与所述连接件(132)固定连接;所述电磁铁(137)通电对所述磁性件(138)产生第一方向的力时,所述磁性件(138)及所述连接件(132)向第一方向运动,同时所述弹性件(136)产生弹性变形;所述电磁铁(137)断电时,所述弹性件(136)带动所述连接件(132)及所述磁性件(138)向与第一方向相反的方向运动;控制所述电磁铁(137)的通断电,所述磁性件(138)通过所述连接件(132)带动吐液枪头的出口端做位移呈正弦变化或者速度呈方波变化的运动。
- 一种流体驱动机构,包括:变容积组件(121),包括注射筒(1211)及推杆(1212),所述推杆(1212)与所述注射筒(1211)的内壁滑动配合,所述注射筒(1211)内能够储存驱动液体(1214),所述注射筒(1211)具有进出液口(1213),所述进出液口(1213)用于连通储存有第一液体(190)的吐液枪头(110)的入口端;动力组件(122),与所述推杆(1212)传动连接,用于驱动所述推杆(1212)沿所述注射筒(1211)的延伸方向滑动;在微液滴的生成过程中,所述动力组件(122)驱动所述推杆(1212)挤压储存在所述注射筒(1211)内的所述驱动液体(1214),所述驱动液体(1214)挤压储存在所述吐液枪头(110)内的所述第一液体(190),进而将所述第一液体(190)从所述吐液枪头(110)的出口端排出。
- 根据权利要求24所述的流体驱动机构,其特征在于,所述注射筒(1211)的所述进出液口(1213)与所述吐液枪头(110)的入口端之间通过细管连通。
- 根据权利要求24所述的流体驱动机构,其特征在于,所述动力组件(122)能够驱动所述推杆(1212)在所述注射筒(1211)内匀速滑动。
- 根据权利要求24所述的流体驱动机构,其特征在于,还包括:储液罐(125),用于储存所述驱动液体(1214);三通换向阀(124),具有第一接口、第二接口及第三接口,所述吐液枪头(110)的入口端(111)、所述进出液口(1213)及所述储液罐(125)分别与所述第一接口、所述第二接口及所述第三接口连通。
- 根据权利要求24所述的流体驱动机构,其特征在于,所述动力组件(122)包括驱动电机(1221)、丝杆(1222)及滑块(1223),所述驱动电机(1221)的输出轴与所述 丝杆(1222)传动连接,所述丝杆(1222)与所述滑块(1223)螺纹连接,所述滑块(1223)与所述推杆(1212)固定连接。
- 根据权利要求28所述的流体驱动机构,其特征在于,所述驱动电机(1221)为伺服电机。
- 根据权利要求24所述的流体驱动机构,其特征在于,所述变容积组件(121)的数量为多个,多个所述变容积组件(121)的所述推杆(1212)均与所述动力组件(122)传动连接。
- 根据权利要求24所述的流体驱动机构,其特征在于,所述变容积组件(121)及所述动力组件(122)均为多个且数量相同,多个所述变容积组件(121)并排间隔设置,每个所述变容积组件(121)由单独的所述动力组件(122)驱动。
- 一种流体驱动方法,其特征在于,采用权利要求24-31任一项所述的流体驱动机构,所述流体驱动方法包括:所述动力组件(122)驱动所述推杆(1212)挤压储存在所述注射筒(1211)内的所述驱动液体(1214),所述驱动液体(1214)挤压储存在所述吐液枪头(110)内的所述第一液体(190),所述第一液体(190)从所述吐液枪头(110)的出口端(112)排出。
- 一种流体驱动方法,其特征在于,采用权利要求27所述的流体驱动机构,所述流体驱动方法包括:所述三通换向阀(124)使所述变容积组件(121)的所述进出液口(1213)与所述储液罐(125)连通,在所述动力组件(122)的带动下,所述推杆(1212)在所述注射筒(1211)内滑动改变所述注射筒(1211)的容积,以将所述储液罐(125)内的所述驱动液体(1214)吸入所述注射筒(1211)内;所述三通换向阀(124)使所述变容积组件(121)的所述进出液口(1213)与所述吐液枪头(110)的入口端连通,在所述动力组件(122)的带动下,所述推杆(1212)在所述注射筒(1211)内滑动改变所述注射筒(1211)的容积,以排出所述注射筒(1211)内以及所述吐液枪头(110)内的气体;所述吐液枪头(110)的出口端进入所述第一液体(190)中,并维持所述三通换向阀(124)使所述变容积组件(121)的所述进出液口(1213)与所述吐液枪头(110)的入口端连通,在所述动力组件(122)的带动下,所述推杆(1212)在所述注射筒(1211)内滑动改变所述注射筒(1211)的容积,以将所述第一液体(190)吸进所述吐液枪头(110)内;所述三通换向阀(124)使所述变容积组件(121)的所述进出液口(1213)与所述吐液枪头(110)的入口端(111)连通,在所述动力组件(122)的带动下,所述推杆(1212)在所述注射筒(1211)内滑动改变所述注射筒(1211)的容积,以将储存在所述吐液枪头(110)内的所述第一液体(190)以均匀的流速排出所述吐液枪头(110)的出口端(112)。
- 一种微液滴生成方法,包括以下步骤:S201,提供具有出口端的吐液枪头,所述吐液枪头内储存有第一液体;提供储存有第 二液体的微液滴容器,所述微液滴容器具有开口;第一液体与第二液体为任意互不相溶的两种液体或具有界面反应的两种液体;S202,所述吐液枪头的出口端由所述微液滴容器的开口插入第二液体的液面下;S203,所述吐液枪头的出口端在第二液体的液面下做包含瞬时加速的运动,同时第一液体由所述吐液枪头的出口端排出,排出所述吐液枪头的出口端的第一液体形成附着在所述吐液枪头的出口端的液滴,液滴在所述吐液枪头的出口端的瞬时加速运动过程中脱离所述吐液枪头的出口端在第二液体的液面下形成微液滴。
- 根据权利要求34所述的微液滴生成方法,其特征在于,所述步骤S203中,所述吐液枪头的出口端在第二液体的液面下做包含瞬时加速的周期运动。
- 根据权利要求35所述的微液滴生成方法,其特征在于,所述步骤S203中,所述吐液枪头的出口端在第二液体液面下的周期运动过程中,所述吐液枪头的出口端的速度大小呈矩形波变化。
- 根据权利要求36所述的微液滴生成方法,其特征在于,所述吐液枪头的出口端的速度大小呈方波变化。
- 根据权利要求37所述的微液滴生成方法,其特征在于,所述步骤S203中,所述吐液枪头的出口端周期运动的前半周期与后半周期内,所述吐液枪头的出口端的速度大小相同,方向相反。
- 根据权利要求35所述的微液滴生成方法,其特征在于,所述步骤S203中,所述吐液枪头的出口端在第二液体液面下的运动轨迹包括直线段、圆弧段、多边形多种轨迹中的一种或多种的组合。
- 根据权利要求35所述的微液滴生成方法,其特征在于,所述步骤S203中,所述吐液枪头的出口端在第二液体液面下周期运动的频率介于0.1赫兹至200赫兹之间。
- 根据权利要求34所述的微液滴生成方法,其特征在于,所述步骤S203中,所述吐液枪头的出口端在第二液体液面下的运动方向与所述吐液枪头的延伸方向垂直或平行或呈任意角度。
- 根据权利要求34-41任一项所述的微液滴生成方法,其特征在于,所述步骤S203中,第一液体由所述吐液枪头的出口端连续排出。
- 根据权利要求42所述的微液滴生成方法,其特征在于,所述步骤S203中,第一液体由所述吐液枪头的出口端以恒定的流速排出。
- 一种微液滴生成方法,包括以下步骤:S211,提供具有出口端的吐液枪头,所述吐液枪头内储存有第一液体;提供储存有第二液体的微液滴容器,所述微液滴容器具有开口;第一液体与第二液体为任意互不相溶的两种液体或具有界面反应的两种液体;S212,所述吐液枪头的出口端由所述微液滴容器的开口插入第二液体的液面下;S213,所述吐液枪头的出口端在第二液体液面下做速度大小呈周期变化的运动,在速度大小变化的前半周期与后半周期内,所述吐液枪头的出口端的速度大小均单调变化,同 时第一液体由所述吐液枪头的出口端排出,排出所述吐液枪头的出口端的第一液体形成附着在所述吐液枪头的出口端的液滴,液滴在所述吐液枪头的出口端的运动过程中脱离所述吐液枪头的出口端在第二液体液面下形成微液滴。
- 根据权利要求44所述的微液滴生成方法,其特征在于,在所述步骤S213中,在一个速度大小变化周期内,所述吐液枪头的出口端的速度大小以中间时刻点为中点呈中心对称。
- 根据权利要求45所述的微液滴生成方法,其特征在于,在所述步骤S213中,所述吐液枪头的出口端在第二液体液面下的加速度及运动轨迹均呈周期性变化。
- 根据权利要求46所述的微液滴生成方法,其特征在于,在所述步骤S213中,所述吐液枪头的出口端在第二液体液面下的速度大小呈余弦曲线变化。
- 根据权利要求47所述的微液滴生成方法,其特征在于,在所述吐液枪头的出口端速度变化的前半周期中加速阶段和后半周期中加速阶段,分别有一个液滴脱离所述吐液枪头的出口端形成微液滴。
- 根据权利要求47所述的微液滴生成方法,其特征在于,在所述步骤S213中,所述吐液枪头的出口端在第二液体液面下的运动轨迹包括直线段、圆弧段、多边形多种轨迹中的一种或多种的组合。
- 根据权利要求46所述的微液滴生成方法,其特征在于,在所述步骤S213中,所述吐液枪头的出口端在第二液体液面下周期运动的频率介于0.1赫兹至200赫兹之间。
- 根据权利要求44所述的微液滴生成方法,其特征在于,在所述步骤S213中,速度大小变化的一个周期内,所述吐液枪头的出口端在前半周期与后半周期均是匀变速运动。
- 根据权利要求51所述的微液滴生成方法,其特征在于,在所述步骤S213中,所述吐液枪头的出口端在前半周期与后半周期的加速度大小相等。
- 根据权利要求44-52任一项所述的微液滴生成方法,其特征在于,所述步骤S213中,第一液体由所述吐液枪头的出口端连续排出。
- 根据权利要求53所述的微液滴生成方法,其特征在于,所述步骤S213中,第一液体由所述吐液枪头的出口端以恒定的流速排出。
- 一种吐液枪头表面处理方法,用于对吐液枪头进行表面处理,包括以下步骤:S260,对所述吐液枪头进行硅烷化处理;S270,使用焦碳酸二乙酯水溶液处理所述吐液枪头;S280,烘干所述吐液枪头。
- 根据权利要求55所述的吐液枪头表面处理方法,其特征在于,在所述步骤S260前还包括步骤S240,预处理所述吐液枪头;所述步骤S240中,所述预处理包括对所述吐液枪头进行脱脂、去污或清洗操作中的一种或几种。
- 根据权利要求56所述的吐液枪头表面处理方法,其特征在于,所述步骤S240中,使用超声波振动对吐液枪头表面进行辅助脱脂、辅助去污或辅助清洗。
- 根据权利要求56所述的吐液枪头表面处理方法,其特征在于,所述吐液枪头是不锈钢材质,所述步骤S240中,使用不锈钢清洗剂清洗所述吐液枪头。
- 根据权利要求56所述的吐液枪头表面处理方法,其特征在于,所述吐液枪头是不锈钢材质,所述步骤S240之后且在所述步骤S260之前还包括步骤S250,电解抛光所述吐液枪头。
- 根据权利要求55所述的吐液枪头表面处理方法,其特征在于,所述步骤S260依次包括:S261,使用去离子水清洗或浸泡所述吐液枪头;S262,使用硅烷化试剂处理所述吐液枪头;S263,使用去离子水清洗或浸泡所述吐液枪头。
- 根据权利要求60所述的吐液枪头表面处理方法,其特征在于,所述步骤S262中,所述硅烷化试剂包括四氢化硅和氢化磷的混合气体。
- 根据权利要求61所述的吐液枪头表面处理方法,其特征在于,所述混合气体中所述四氢化硅的体积百分比为95.0%-99.9%,所述混合气体中所述氢化磷的体积百分比为0.1%-5.0%。
- 根据权利要求55所述的吐液枪头表面处理方法,其特征在于,所述步骤S270包括:S271,使用体积分数为0.5%-1.5%的所述焦碳酸二乙酯水溶液浸泡所述吐液枪头10min-20min;S272,对所述吐液枪头进行高压灭菌。
- 根据权利要求63所述的吐液枪头表面处理方法,其特征在于,所述步骤S271中,使用体积分数为1%的所述焦碳酸二乙酯水溶液浸泡所述吐液枪头15min。
- 根据权利要求55所述的吐液枪头表面处理方法,其特征在于,所述步骤S280中,烘干所述吐液枪头时使用氮气做保护气体。
- 根据权利要求55所述的吐液枪头表面处理方法,其特征在于,所述吐液枪头为石英毛细管、玻璃管及双纤毛细管中的一种。
- 根据权利要求55所述的吐液枪头表面处理方法,其特征在于,所述吐液枪头的一端为出口端,所述吐液枪头表面处理方法用于对所述吐液枪头的出口端及外侧壁进行表面处理。
- 一种流体驱动机构,包括:壳体(100);第一变容积组件(200),设置于所述壳体(100)内,所述第一变容积组件(200)包括第一注射筒(201)及第一推杆(202),所述第一推杆(202)与所述第一注射筒(201)的内壁滑动配合,所述第一注射筒(201)内能够储存第一驱动液体(810),所述第一注射筒(201)具有进出液口,所述进出液口用于连通储存有第三液体(820)的第一吐液枪头(830)的入口端;直线电机组件(300),设置于所述壳体(100)内,所述直线电机组件(300)的输出端与所述第一推杆(202)传动连接,用于驱动所述第一推杆(202)沿所述第一注射筒(201)的延伸方向滑动。
- 根据权利要求68所述的流体驱动机构,其特征在于,所述直线电机组件(300)包括音圈电机(301),所述音圈电机(301)设置于所述第一注射筒(201)的一侧,所述音圈电机(301)中次级的滑动方向与所述第一推杆(202)在所述第一注射筒(201)内的滑动方向平行,所述音圈电机(301)的次级与所述第一推杆(202)传动连接。
- 根据权利要求69所述的流体驱动机构,其特征在于,所述直线电机组件(300)还包括连接板(302),所述连接板(302)的一端与所述音圈电机(301)的次级固定连接,所述连接板(302)的另一端与所述第一推杆(202)位于所述第一注射筒(201)外的一端固定连接。
- 根据权利要求70所述的流体驱动机构,其特征在于,所述直线电机组件(300)还包括导向件(303),所述导向件(303)包括导轨和滑块,所述导轨固定设置于所述壳体(100)内,所述导轨的延伸方向与所述第一推杆(202)的滑动方向平行,所述滑块滑动设置于所述导轨,且所述滑块与所述连接板(302)固定连接。
- 根据权利要求70所述的流体驱动机构,其特征在于,所述音圈电机(301)的所述次级(312)包括骨架(3121)和线圈(3122),所述线圈(3122)缠设于所述骨架(3121),所述骨架(3121)与所述连接板(302)一体成型。
- 根据权利要求69所述的流体驱动机构,其特征在于,所述音圈电机(301)包括初级(311)和次级(312);所述初级(311)包括第一对磁体(3111)和第二对磁体(3112),所述第一对磁体(3111)和所述第二对磁体(3112)沿所述次级(312)的滑动方向顺次设置于所述壳体(100)内,所述第一对磁体(3111)中的两块磁体相异的磁极相对设置,所述第二对磁体(3112)中的两块磁体相异的磁极相对设置,所述第一对磁体(3111)之间的磁感线方向与所述第二对磁体(3112)之间的磁感线方向相反;所述次级(312)包括骨架(3121)和线圈(3122),所述线圈(3122)缠绕于所述骨架(3121),所述线圈(3122)具有通电后电流方向相反的第一段(3125)和第二段(3126),所述次级(312)滑动时,所述线圈(3122)的所述第一段(3125)在所述第一对磁体(3111)之间滑动,所述线圈(3122)的所述第二段(3126)在所述第二对磁体(3112)之间滑动。
- 根据权利要求73所述的流体驱动机构,其特征在于,所述壳体(100)包括相对的第一安装端面(141)和第二安装端面(143),所述第一安装端面(141)和所述第二安装端面(143)上分别开设有第一安装孔(142)和第二安装孔(144),所述第一安装孔(142)和所述第二安装孔(144)相对设置;所述音圈电机(301)的所述初级(311)还包括第一安装板(3114)和第二安装板(3115),所述第一安装板(3114)和所述第二安装板(3115)分别可拆卸固定于所述第一安装孔(142)和所述第二安装孔(144);所述第一对磁体(3111)中的两块磁体分别安装在所述第一安装板(3114)和所述第二安装板(3115)沿所述次级(312)滑动方向的一端,所述第二对磁体(3112)中的两块磁体分别安装在所述第一安装 板(3114)和所述第二安装板(3115)沿所述次级(312)滑动方向的另一端。
- 根据权利要求69所述的流体驱动机构,其特征在于,所述直线电机组件(300)还包括位移传感器,所述位移传感器设置于所述壳体(100)内,所述位移传感器与所述音圈电机(301)电连接。
- 根据权利要求69所述的流体驱动机构,其特征在于,所述音圈电机(301)为伺服电机。
- 根据权利要求68所述的流体驱动机构,其特征在于,所述流体驱动机构还包括换向阀(400),所述换向阀(400)包括换向阀第一接口(411)、换向阀第二接口(412)及换向阀第三接口(413),所述换向阀第一接口(411)、所述换向阀第二接口(412)及所述换向阀第三接口(413)能够分别与第一吐液枪头(830)的入口端、所述进出液口及储存有第一驱动液体(810)的储液罐连通;所述换向阀(400)动作时能够连通所述换向阀第一接口(411)和所述换向阀第二接口(412),或者所述换向阀(400)动作时能够连通所述换向阀第三接口(413)和所述换向阀第二接口(412)。
- 根据权利要求77所述的流体驱动机构,其特征在于,所述换向阀(400)包括阀体(410)和连通块(420),所述阀体(410)包括所述换向阀第一接口(411)、所述换向阀第二接口(412)及所述换向阀第三接口(413);所述连通块(420)内开设有相互独立的第一流道(421)、第二流道(422)和第三流道(423),所述第一流道(421)、所述第二流道(422)以及所述第三流道(423)均贯通所述连通块(420);所述第一流道(421)、所述第二流道(422)以及所述第三流道(423)的一端分别与所述换向阀第一接口(411)、所述换向阀第二接口(412)及所述换向阀第三接口(413)连接,所述第一流道(421)、所述第二流道(422)以及所述第三流道(423)的另一端分别与第一吐液枪头(830)的入口端、所述进出液口及储存有第一驱动液体(810)的储液罐连接,所述第一流道(421)、所述第二流道(422)以及所述第三流道(423)内表面分别抛光且圆角过渡。
- 根据权利要求68所述的流体驱动机构,其特征在于,所述壳体(100)呈中空的长方体状,所述壳体(100)的一端面开设有连接孔,多个所述壳体(100)能够通过所述连接孔并列安装于基体。
- 根据权利要求79所述的流体驱动机构,其特征在于,所述壳体(100)沿并列延伸方向的尺寸为18mm。
- 一种流体驱动方法,其特征在于,采用权利要求68-80任一项所述的流体驱动机构,所述流体驱动方法包括:所述直线电机组件(300)驱动所述第一推杆(202)挤压储存在所述第一注射筒(201)内的所述第一驱动液体(810),所述第一驱动液体(810)挤压储存在所述第一吐液枪头(830)内的所述第三液体(820),所述第三液体(820)从所述第一吐液枪头(830)的出口端排出;所述第一驱动液体(810)与所述第三液体(820)不互溶。
- 一种流体驱动方法,其特征在于,采用权利要求77所述的流体驱动机构,所述流体驱动方法包括:所述换向阀(400)使所述第一注射筒(201)的所述进出液口与所述储液罐连通,在所述直线电机组件(300)的带动下,所述第一推杆(202)在所述第一注射筒(201)内滑动改变所述第一注射筒(201)的容积,以将所述储液罐内的所述第一驱动液体(810)吸入所述第一注射筒(201)内;所述换向阀(400)使所述第一注射筒(201)的所述进出液口与所述第一吐液枪头(830)的入口端连通,在所述直线电机组件(300)的带动下,所述第一推杆(202)在所述第一注射筒(201)内滑动改变所述第一注射筒(201)的容积,以排出所述第一注射筒(201)内以及所述第一吐液枪头(830)内的气体;所述第一吐液枪头(830)的出口端进入所述第三液体(820)中,并维持所述换向阀(400)使所述第一注射筒(201)的所述进出液口与所述第一吐液枪头(830)的入口端连通,在动力组件的带动下,所述第一推杆(202)在所述第一注射筒(201)内滑动改变所述第一注射筒(201)的容积,以将所述第三液体(820)吸进所述第一吐液枪头(830)内;所述换向阀(400)使所述第一注射筒(201)的所述进出液口与所述第一吐液枪头(830)的入口端连通,在所述直线电机组件(300)的带动下,所述第一推杆(202)在所述第一注射筒(201)内滑动改变所述第一注射筒(201)的容积,以将储存在所述第一吐液枪头(830)内的所述第三液体(820)以设定的流速排出所述第一吐液枪头(830)的出口端。
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