Space-charge controlled electrostatic spraying

Details Space-charge controlled electrostatic spraying Space-charge controlled electrostatic spraying

B - Operations, Transporting

05

B

117/54, 32/16.1,

B05B 5/00 (2006.01) B05B 5/043 (2006.01) B05B 5/08 (2006.01) B05B 12/12 (2006.01)

Patent

CA 1063887

Abstract of the Disclosure Disclosed is a low volume, space-charge controlled electrostatic spraying which is particularly suitable for use in agriculture but is applicable to industrial and other settings as well. A substance is sprayed through a relatively low voltage nozzle producing finely divided, electrostatically charged particles of the substance. The charged particles are liquid droplets or dust particles, and are about 50 microns or less in size. The space-charge density of the charged particles is monitored, and the deposition of particles on a calibration target is measured at different space-charge densities to establish an optimal space-charge density corresponding to optimum (e.g., maximum or most uniform) deposition. As the charged particles are subsequently directed to target objects, such as plants, the space-charge density is monitored and the spraying and/or charging systems are controlled to maintain the established optimal level which corresponds to optimal deposition.

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