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Method and device for controlling tiny droplet spraying by airflows

A micro-droplet and airflow control technology, which is applied in printing and other directions, can solve the problem of no airflow control micro-droplet micro-droplet spraying device, etc., and achieve the effect of simple structure and simple processing process

Inactive Publication Date: 2014-09-10
BEIJING TSINGKE INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no micro-droplet ejection device that controls the ejection of micro-droplets by air flow

Method used

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  • Method and device for controlling tiny droplet spraying by airflows
  • Method and device for controlling tiny droplet spraying by airflows
  • Method and device for controlling tiny droplet spraying by airflows

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0086] (1) Production of quartz capillary dripper

[0087] Such as figure 1 , 5 , take a 30cm long quartz capillary (inner diameter 25um×outer diameter 300um), take 1cm from one end and burn it on an alcohol lamp until the outer protective layer (polyimide) completely turns black, remove the blackened outer protective layer, Remove one end of the outer protective layer and insert it into a hydrofluoric acid solution for etching, measure the outer diameter of the capillary dropper 20 under a microscope, take it out when the capillary dropper 20 reaches 40um, etch for 10 hours, and finally rinse the capillary dropper 20 with a large amount of water .

[0088] (2) Production of small tapered tubes

[0089] Such as figure 2 , take a small pipette tip 1 (6×50mm), place a 5mL disposable syringe needle on an alcohol lamp and burn it until it turns red. Get 6 through holes 14, each hole is the same size and the hole position spacing is equal.

[0090] (3) Production of large ta...

Embodiment 2

[0099] (1) Production of quartz capillary dripper

[0100] Take a section of 30cm long quartz capillary (inner diameter 25um×outer diameter 300um), take 1cm from one end and burn it on an alcohol lamp until the outer protective layer (polyimide) turns black completely, then remove the blackened outer protective layer as Capillary dropper, the outer diameter of the capillary dropper measured under a microscope is 280um.

[0101] (2) Production of small tapered tubes

[0102] Such as figure 2 , take a small pipette tip 1 (6×50mm), place a 5mL disposable syringe needle on an alcohol lamp and burn it until it turns red. Get 6 through holes 14, each hole is the same size and the hole position spacing is equal.

[0103] (3) Production of large tapered tubes

[0104] Such as Figure 4 , 5 , take a large pipette tip 2 (8 × 70mm), cut off 1 cm at the tip of the tip, and obtain 16 holes with a diameter of 3 mm at the tip.

[0105] (4) Casing production

[0106] Such as Figure...

Embodiment 3

[0112] The steps of realizing tiny droplet ejection with the device of the present invention are as follows:

[0113] (1), such as Figure 5 , 6 , Fix the assembled device in Example 1 on the iron stand, with the spout 19 and the capillary dripper 20 vertically downward.

[0114] (2), select a disposable syringe (1mL), a miniature syringe pump controller (Baoding Gelan TJ-1A), an exhaust pump (Haili ACO-9602); the disposable syringe is loaded with 200ppm rhodamine solution and placed in the syringe pump superior.

[0115] (3), such as Figure 5 , 6 , the capillary liquid inlet 1 is connected with the disposable syringe needle on the micro-injection pump controller; the third nozzle 7 of the three-way glass tube is closely connected with the gas generator (gas outlet of the exhaust pump).

[0116] (4), set the controller parameters of the exhaust pump and the micro-injection pump, and turn on the exhaust pump and the micro-injection pump controllers in sequence.

[0117] ...

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Abstract

The invention discloses a device for controlling tiny droplet spraying by airflows. The device comprises a capillary tube, wherein the capillary tube is positioned in the center and is used for spraying liquid, the bottom of the capillary tube is provided with a capillary tube dripping head and a spray opening, the spray opening is arranged on the outer periphery of the capillary tube dripping head and is used for spraying the airflows, and the airflows sprayed out from the spray opening act on tiny droplets generated by the capillary tube dripping head arranged in the middle of the spray opening so that the tiny droplets are sprayed, wherein the outer diameter of the capillary tube droplet is smaller than 280mum. The tiny droplets can be controlled through controlling the airflows, the structure is simple, the complicated spray nozzle structure and the complicated control driving circuit are not needed, and in addition, the outer diameter of the capillary tube spray head can reach the value smaller than 100mum, so the tiny droplets can be sprayed out. In addition, the capillary tube dripping head is obtained through chemical treatment and processing, the processing process is simple, and large-scale and complicated instrument equipment and special chemical reagents are not needed.

Description

technical field [0001] The present invention relates to the field of micro-drop ejection devices for generating micro-drops, in particular to a device for ejecting micro-drops through airflow. Background technique [0002] In the field of micro-drop ejection devices for ejecting micro-droplets, currently known micro-droplet ejection devices are applied to nozzles of inkjet printers, and are mainly composed of nozzles, control drive signal circuits, etc.; And continuous micro-droplets are sprayed from the ejection port. In the publication number CN1404993A, some piezoelectric bending transducers are arranged in the droplet generator shell, and the high-voltage driving micro-droplets are ejected with a control signal. However, the micro-droplets The ejection device is applied to the nozzle of an inkjet printer, and its structure is relatively complex and requires a complicated control circuit drive. [0003] In the field of chemistry, such as microchemical reaction devices an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/02B41J2/14B41J2/11
Inventor 林素芬曾荔明张炜奋
Owner BEIJING TSINGKE INSTR
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