Title:
LIQUID CIRCULATION DEVICE, AND LIQUID DISCHARGE DEVICE
Document Type and Number:
Japanese Patent JP2019137021
Kind Code:
A
Abstract:
To provide a liquid circulation device which can detect liquid shortage, and a liquid discharge device.SOLUTION: A liquid circulation device comprises a pressurization pump, a depressurization pump, a buffer tank, a pressure sensor, and a processor. The pressurization pump sucks up a liquid from a liquid makeup tank, and supplies the liquid to a liquid discharge head. The depressurization pump recovers the liquid from the liquid discharge head, and supplies the liquid to the liquid makeup tank. The buffer tank is connected between the liquid discharge head and the pressurization pump, and between the liquid discharge head and the depressurization pump, and the liquid is flown into the buffer tank. The pressure sensor detects a pressure in the buffer tank. The processor controls drive voltages of the pressurization pump and the depressurization pump on the basis of a nozzle surface pressure of the liquid discharge head which is calculated based on pressure data detected by the pressure sensor, and determines, on the basis of the nozzle surface pressure, the drive voltage of the pressurization pump and the drive voltage of the depressurization pump, whether or not there is liquid shortage.SELECTED DRAWING: Figure 2
Inventors:
GOTO DAIKI
HARA CHIHIRO
HARA CHIHIRO
Application Number:
JP2018025164A
Publication Date:
August 22, 2019
Filing Date:
February 15, 2018
Export Citation:
Assignee:
TOSHIBA TEC KK
International Classes:
B41J2/175; B41J2/18
Domestic Patent References:
| JP2009101516A | 2009-05-14 | |||
| JP2017185717A | 2017-10-12 | |||
| JP2009028963A | 2009-02-12 | |||
| JP2007196588A | 2007-08-09 |
Foreign References:
| US20110279495A1 | 2011-11-17 | |||
| KR20180124227A | 2018-11-21 |
Attorney, Agent or Firm:
Kurata Masatoshi
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Tadashi Inoue
Ukai Ken
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Tadashi Inoue
Ukai Ken