US 12,420,566 B2
Dielectric heating device and liquid ejection system
Tadashi Aizawa, Nagano (JP)
Assigned to Seiko Epson Corporation, Tokyo (JP)
Filed by SEIKO EPSON CORPORATION, Tokyo (JP)
Filed on Jun. 28, 2023, as Appl. No. 18/342,762.
Claims priority of application No. 2022-105371 (JP), filed on Jun. 30, 2022.
Prior Publication US 2024/0001691 A1, Jan. 4, 2024
Int. Cl. B41J 11/00 (2006.01); H05B 6/48 (2006.01); H05B 6/52 (2006.01); H05B 6/54 (2006.01)
CPC B41J 11/0021 (2021.01) [B41J 11/0024 (2021.01); H05B 6/48 (2013.01); H05B 6/52 (2013.01); H05B 6/54 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A dielectric heating device comprising:
a first heater that is configured to heat and dry a liquid and that includes
a first electrode and a second electrode that face a medium on which is deposited the liquid containing water and
a first coil electrically coupled in series with the first electrode
and
a voltage application section that applies an AC voltage having a predetermined driving frequency to the first electrode and to the second electrode, wherein
the first heater is configured such that a difference between the driving frequency and a resonant frequency of the first heater when the water content of the medium is in a first range is smaller than a difference between the driving frequency and the resonant frequency of the first heater when the water content is in a second range, which is smaller than the first range, and
a heat amount when the water content is in the first range is larger than a heat amount when the water content is in the second range.