LIQUID FEEDING DEVICE AND LIQUID FEEDING METHOD

WIPO Patent Application WO/2021/192929

A1

The present invention realizes a liquid feeding device capable of feeding liquid with high accuracy. The liquid feeding device comprises: a liquid feeding unit 104 having cylinders 205, 206 for performing solvent suction and discharge operations by sliding plungers 207, 208; a pressure sensor 217 that is disposed on the downstream side of the liquid feeding unit 104, and detects the pressure of a discharged solvent; switching valves 102a-102d for switching a plurality of solvents to be sucked and discharged; and a control unit 218 for controlling the operations of the liquid feeding unit 104 and the switching valves 102a-102d. The control unit 218 controls the operations of the switching valves 102a-102d in synchronization with the suction operations of the plungers 207, 208 so as to change the mixing ratio of the plurality of solvents, controls the plungers 207, 208 to operate at least at a first acceleration and a second acceleration different from each other, and reduces oscillation of the solvents sucked by the plungers 207, 208.

JPS5543230	UNLOADING MECHANISM OF RECIPROCATION TYPE COMPRESSOR
JP4698577	Linear compressor control system, linear compressor control method, linear compressor and cooling system

AKIEDA DAISUKE (JP)
TSUKADA NOBUHIRO (JP)
YOTA YUSUKE (JP)
HASHIMOTO YUICHIRO (JP)
MAEDA JUN (JP)

PCT/JP2021/008759

September 30, 2021

March 05, 2021

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HITACHI HIGH TECH CORP (JP)

F04B49/06; F04B49/08; G01N30/32; G01N30/34

WO2016167174A1

2016-10-20

JP5879280B2	2016-03-08
JP2002048072A	2002-02-15
US20120198919A1	2012-08-09
JPS61234284A	1986-10-18
JP2006292392A	2006-10-26
JP5879280B2	2016-03-08

See also references of EP 4130474A4

KAICHI IP (JP)

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