公开(公告)号：US20230384270A1

公开(公告)日：2023-11-30

申请号：US18191415

申请日：2023-03-28

Applicant: SHIMADZU CORPORATION

Inventor： Yutaka KURATANI ,  Shingo Masuda ,  Masaru Kozakura ,  Masahiro Kojima

IPC: G01N30/30

CPC classification number: G01N30/30 ,  G01N2030/025

Abstract: A gas chromatograph includes an oven that has a first heater device and a second heater device. The first heater device and the second heater device are connected in series when a voltage of a power supply is a first voltage, and are connected in parallel when the voltage of the power supply is a second voltage that is lower than the first voltage. A power controller includes a first control device that controls ON/OFF of supply of power to the series-connected first heater device and second heater device or ON/OFF of supply of power to the parallel-connected first heater device, and a second control device that controls ON/OFF of supply of power to the parallel-connected second heater device. A controller adjusts a duty ratio of supply of power to the parallel-connected first heater device and second heater device by controlling the first control device and the second control device when the voltage of the power supply is the second voltage.

公开(公告)号：US11959893B2

公开(公告)日：2024-04-16

申请号：US17294451

申请日：2019-09-06

Applicant: SHIMADZU CORPORATION

Inventor： Masaru Kozakura ,  Hiroki Kaji

IPC: G01N30/54 ,  G01N30/02 ,  G01N30/30

CPC classification number: G01N30/54 ,  G01N30/30 ,  G01N2030/025

Abstract: The gas chromatograph system 10 has the gas chromatograph 1, and a detector 2. The detector 2 has the redox unit 14. The redox unit 14 has the reaction tube 142, the oxidation zone 146 and the reduction zone 147. The reduction zone 147 is disposed on the downstream side of the oxidation zone 146. The reduction zone 147 is disposed out of a position perpendicular direction above the oxidation zone 146. Hence, even if the air heated around the oxidation zone 146 moved upward by convection, the reduction zone 147 is prevented from being exposed to such hot air.