US 12,115,786 B2
Liquid droplet generation method
Yuusuke Kourai, Tokyo (JP); Mutsumi Suzuki, Tokyo (JP); Hirohisa Mizota, Tokyo (JP); Masanori Kitaoka, Tokyo (JP); and Kota Sasaki, Tokyo (JP)
Assigned to HITACHI, LTD., Tokyo (JP)
Appl. No. 17/926,198
Filed by HITACHI, LTD., Tokyo (JP)
PCT Filed May 6, 2021, PCT No. PCT/JP2021/017410
§ 371(c)(1), (2) Date Nov. 18, 2022,
PCT Pub. No. WO2021/256111, PCT Pub. Date Dec. 23, 2021.
Claims priority of application No. 2020-104874 (JP), filed on Jun. 17, 2020.
Prior Publication US 2023/0173807 A1, Jun. 8, 2023
Int. Cl. B41J 2/14 (2006.01); B05B 17/06 (2006.01); B41J 2/015 (2006.01)
CPC B41J 2/14008 (2013.01) [B05B 17/0607 (2013.01); B41J 2/015 (2013.01)] 2 Claims
OG exemplary drawing
 
2. A liquid droplet generation method for generating liquid droplets from a liquid layer by using a plurality of transducers, the method comprising:
irradiating the liquid layer with a plurality of ultrasonic waves from the plurality of transducers to scatter a plurality of primary liquid droplets from the liquid layer;
causing the plurality of primary liquid droplets being scattered to aggregate and grow into a secondary liquid droplet; and wherein
signal application timing is different for each of the plurality of transducers to converge the plurality of ultrasonic waves at a focal point, and
the liquid layer has a thickness of 50% or less of a distance of the focal point.