公开(公告)号：US20190219194A1

公开(公告)日：2019-07-18

申请号：US16217523

申请日：2018-12-12

Applicant: SHIMADZU CORPORATION

Inventor： Wenjian LU ,  Shigeaki SHIBAMOTO ,  Jun YANAGIBAYASHI

IPC: F16K99/00

CPC classification number: F16K99/0015

Abstract: A first flow path is connected to an inlet for introducing gas into a microvalve. A second flow path is connected to an outlet for allowing gas to flow out of the microvalve. A third flow path is for introducing a pneumatic fluid into the microvalve. A negative pressure generation mechanism (a pump) is for generating a negative pressure on the second flow path to suck gas from the first flow path forward the second flow path via the microvalve. A pressure adjustment mechanism (a connection flow path and a valve) is for reducing a pressure difference between the second flow path and the third flow path to prevent the inlet and the outlet from being blocked by a diaphragm layer in response to the negative pressure generated on the second flow path side.

公开(公告)号：US20190041368A1

公开(公告)日：2019-02-07

申请号：US15665753

申请日：2017-08-01

Applicant: Shimadzu Corporation

Inventor： Yuji NAKAMA ,  Shigeaki SHIBAMOTO ,  Minoru Kashihara

IPC: G01N30/32 ,  G01N30/62 ,  G01N30/86 ,  G01N35/10

CPC classification number: G01N30/32 ,  G01N30/62 ,  G01N30/8658 ,  G01N35/1097 ,  G01N2030/025 ,  G01N2030/324 ,  G01N2030/6013 ,  G01N2030/625 ,  G01N2030/628

Abstract: Provided is a gas chromatograph including a column which separates a sample; a detector which is configured to alternately introduce a carrier gas containing a sample component separated by the column and a carrier gas alone into a detection unit by changing an inflow point of the carrier gas to acquire a signal; an analysis information input unit with which analysis information is input; a data retaining unit which retains data indicating a relationship between a column flow rate and a carrier gas flow rate which is obtained in advance; and calculation unit which is configured to calculate the carrier gas flow rate on the basis of the analysis information input from the analysis information input unit and calculate the carrier gas flow rate according to the calculated column flow rate by using the calculated column flow rate and the data retained in the data retaining unit.