Flat plate electrospray emission device with micro channels

Abstract

The invention discloses a flat plate electrospray emission device with micro channels. The flat plate electrospray emission device comprises a liquid storage tank, a flat plate emitting electrode and an extraction electrode which are sequentially arranged from top to bottom. The flat plate electrospray emission device is characterized in that a porous medium material and working media needed by electrospray are arranged in the liquid storage tank; a liquid outlet hole is formed in the center of a lower end plate of the liquid storage tank, a plurality of emitting holes are formed in the portion, corresponding to the liquid outlet hole, of the flat plate emitting electrode, a plurality of micro holes are formed in the extraction electrode, and the emitting holes correspond to the micro holes one to one; the annular channels are formed in the peripheries of the emitting holes of the flat plate emitting electrode respectively and located on the lower end face of the flat plate emitting electrode; a positioning column is arranged between the flat plate emitting electrode and the extraction electrode; the flat plate emitting electrode is used for distributing the spray flow and controlling the Taylor cone form formed by the electrospray working media near the emitting holes; and the extraction electrode is used for improving the electric field intensity near the emitting holes and controlling the spray plume and the deposition form of the micro holes. The flat plate electrospray emission device can be widely applied to the fields of agriculture, sanitation, mass spectrometry, space propulsion and the like.

Description

technical field [0001] The invention relates to the field of spray emission devices, in particular to a flat electrospray emission device with micro-grooves. Background technique [0002] Electrospray technology is widely used in pesticide spraying, environmental disinfection, mass spectrometry, space propulsion and other fields. The emitter is a key component that determines the performance of electrospray, and its manufacturing materials and integration process have an important impact on the stability and economy of electrospray. [0003] At present, most of the existing electrospray emitters are in the form of capillary tubes. The processing accuracy of this method is limited, and it is not easy to expand on a large scale, which seriously limits the application of this technology in the fields of chip heat dissipation and microfluidics. The electrospray emitter produced by processing technology has good expandability, but the silicon-based material after etching is easi...

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Problems solved by technology

[0003] At present, most of the existing electrospray emitters are in the form of capillary tubes. The processing accuracy of this method is limited, and it is not easy to expand on a large scale, which seriously limits the application of this technology in the fields of chip heat dissipation and microfluidics. The electrospray emitter produced by processing technology has good expandability, but the silicon-based material after etching is easily damaged and the service life is low; the use of flat microholes as the emitter can avoid the above problems, but when spraying working fluids with low surface tension When the Taylor cone will inevitably expand and coalesce, resulting in spray failure or even surface breakdown, causing safety problems; and most of the above-mentioned launcher designs are bonded by glue, which cannot be disassembled and repaired

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