Electrostatic spraying array system and optimizing method thereof

Abstract

The invention relates to an optimization control method of an electrostatic spraying array system, which belongs to the technical field of electrostatic spraying. Contains two or more electrostatic spraying units, characterized in that: each electrostatic spraying unit includes an independent or shared charge generation or injection switch (6) with other electrostatic spraying units, an independent or shared with other electrostatic spraying units Shared liquid flow control device or liquid delivery switch (7); the electrostatic spraying array system also includes an automatic control device (4) connected to the charge generation or injection switch (6), liquid flow control device or liquid delivery switch (7) ), the automatic control device (4) realizes the switching mode through one of the following methods or a combination of several methods, that is, the switching state, time and period of the injection of each nozzle: controlling the generation or injection of electric charges, or the flow of liquid, Or liquid delivery on and off to realize the nozzle. The invention has the characteristics of practicability, more uniform spraying and large-scale use in industrial production.

Description

technical field [0001] The invention relates to an optimal control method of an electrostatic spraying array system, which realizes a specific switching mode by controlling the switching state and time of each spraying unit in the electrostatic spraying array to achieve a specific spraying effect, such as uniform spraying or periodic patterns, etc. , belongs to the field of electrostatic spraying technology. Background technique [0002] Electrostatic spraying is a technology that uses electrostatic force to disperse liquid to produce fine droplets with static electricity. Its basic physical principle has been explained by the leakage medium model proposed by G. Taylor and J. R. Melcher in the 1960s. See Annual Review of Fluid Mechanics, 1969, 1, 111-146, Electrohydrodynamics: A Review of the Role of Interfacial Shear Stresses and other documents. Electrostatic spraying technology has been widely used in the fields of large biomolecular mass spectrometers, industrial sprayi...

AI Technical Summary

Problems solved by technology

However, there are two main problems in the design of traditional electrostatic spraying arrays: one is that adjacent nozzles cannot be too close to each other, so as to avoid interference caused by the mutual influence of their electrostatic fields, but this often leads to poor film uniformity or low deposition speed, etc. Problem; Second, the injection area between adjacent nozzles cannot be completely covered or overlaps too much, which is likely to cause periodic defects

However, this solution is limited by the speed of mechanical movement (too fast will affect the spray effect, too slow will affect the uniformity), and it is easy to form new periodic fluctuations or defects, and difficult to optimize for different applications, is a complex and inefficient solution

This design problem has greatly hindered the practical application of electrostatic spraying arrays, so that the current electrostatic spraying technology is still dominated by a single nozzle, mainly relying on methods such as moving the substrate to achieve large-area spraying, and has not been used in applications such as large-area thin film deposition. Can give full play to the inherent advantages of electrostatic spraying, such as easy replication and linear expansion

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