公开(公告)号：US11566976B2

公开(公告)日：2023-01-31

申请号：US16913357

申请日：2020-06-26

Applicant: Shimadzu Corporation

Inventor： Shigeaki Shibamoto ,  Wenjian Lu ,  Ayaka Sato

IPC: G01N30/02 ,  G01N1/22 ,  G01N30/32

Abstract: A gas sampler includes a connection portion connectable to an introduction piping connected to a sample tank, a switching valve for switching a connection state between the connection portion and a sample loop, a pump, and a control device. A buffer flow path between the sample loop and the pump is configured to be selectively connectable to any one of a plurality of buffer tanks different in volume. A volume of the buffer flow path is greater than a volume of the introduction piping by a predetermined amount. The control device operates the pump in a state in which the switching valve is in a closed state to set an inside of the buffer flow path to a negative pressure, and thereafter stops the pump and make the switching valve in an open state to fill the sample loop with a sample gas by using the negative pressure of the buffer flow path.

公开(公告)号：US11015735B2

公开(公告)日：2021-05-25

申请号：US16217523

申请日：2018-12-12

Applicant: SHIMADZU CORPORATION

Inventor： Wenjian Lu ,  Shigeaki Shibamoto ,  Jun Yanagibayashi

IPC: F16K99/00 ,  F16K31/128

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：US11531008B2

公开(公告)日：2022-12-20

申请号：US16919789

申请日：2020-07-02

Applicant: Shimadzu Corporation

Inventor： Shigeaki Shibamoto ,  Wenjian Lu ,  Ayaka Sato

IPC: G01N30/38 ,  G01N1/24 ,  G01N30/06 ,  G01N1/00 ,  G01N30/02

Abstract: A gas sampler (30) is provided with a connection portion (C1) connectable to a sample tank (20), a sample loop (PL) for holding a sample gas introduced from the sample tank (20) to the connection portion (C1), pneumatic switching valves (V1 to V6) for switching a flow path connected to the sample loop (PL), a control piping (81) for transmitting a driving pressure to the switching valves (V1 to V6), a pump (31) for suctioning an inside of the sample loop (PL), and a pressure accumulation tank (80) for accumulating the pressure generated by the operation of the pump (31) as a source pressure.

公开(公告)号：US11099160B2

公开(公告)日：2021-08-24

申请号：US16196225

申请日：2018-11-20

Applicant: SHIMADZU CORPORATION

Inventor： Shigeaki Shibamoto

IPC: G01N30/54 ,  G01N30/60 ,  G01N30/46 ,  G01N30/02 ,  G01N30/30

Abstract: Lowering of a switching recovery rate is suppressed without degrading separating ability in a second analytical column. A multidimensional GC includes a sample injector for injecting a sample, a first analytical column for separating the sample injected from the sample injector into one or more components, the first analytical column communicating with the sample injector, a detector for detecting the components of the sample separated in the first analytical column, a second analytical column provided separately from the first analytical column, a switching device connected to an outlet side of the first analytical column and configured to lead the sample out of the first analytical column to the detector or to the second analytical column, and a temperature adjuster configured to adjust temperature of the switching device to a predetermined temperature independently of a temperature of the first analytical column and a temperature of the second analytical column.

公开(公告)号：US11860136B2

公开(公告)日：2024-01-02

申请号：US17332382

申请日：2021-05-27

Applicant: SHIMADZU CORPORATION

Inventor： Shigeaki Shibamoto

IPC: G01N30/14 ,  C25B1/04 ,  G01N30/02

CPC classification number: G01N30/14 ,  C25B1/04 ,  G01N2030/025

Abstract: A gas chromatography analysis method includes separating a component in sample gas by introducing the sample gas into a separation column (4) using carrier gas, and detecting a component in sample gas that has passed through the separation column (4) by introducing the sample gas into a detector (6). The detecting includes individually taking out hydrogen gas and oxygen gas generated by electrolysis of water, and controlling flow rates of taken-out hydrogen gas and oxygen gas and supplying the taken-out hydrogen gas and oxygen gas to the detector as detector gas.

公开(公告)号：US11796521B2

公开(公告)日：2023-10-24

申请号：US17495160

申请日：2021-10-06

Applicant: SHIMADZU CORPORATION

Inventor： Shigeaki Shibamoto

IPC: G01N33/00 ,  G01N30/38 ,  G01N30/02

CPC classification number: G01N33/0006 ,  G01N33/007 ,  G01N33/0073 ,  G01N2030/025 ,  G01N2030/385

Abstract: A gas analyzer includes: a column that separates a component in a sample gas; a valve that switches, between a test sample gas and a standard sample gas, the sample gas to be supplied to the column; a valve that adjusts an introduction amount of the sample gas to be supplied to the column; a detector that detects, by gas chromatography, the component in the sample gas separated by the column; and a control device. The control device controls the valve to allow the introduction amount to be a predetermined amount, calculates a peak area value of a chromatogram obtained by the detector when the introduction amount is the predetermined amount, and calculates a correspondence between the introduction amount and the peak area value.

公开(公告)号：US10330651B2

公开(公告)日：2019-06-25

申请号：US14870208

申请日：2015-09-30

Applicant: SHIMADZU CORPORATION

Inventor： Yuji Nakama ,  Shigeaki Shibamoto ,  Kazunori Takahashi ,  Minoru Kashihara

IPC: G01N25/18 ,  G01N30/62 ,  G01N30/66

Abstract: A thermal conductivity detector that causes a fluid to come into contact with the surface of a heated temperature sensing element, that causes the temperature of the temperature sensing element to change according to the thermal conductivity of the fluid, and that detects the fluid based on a change in the electrical resistance of the temperature sensing element at that time or on a change in the value of a current to be applied to the temperature sensing element is provided. The thermal conductivity detector includes a cell space where the temperature sensing element is accommodated and to which a fluid is introduced and from which the fluid is discharged, a buffer space that is connected to a fluid outlet of the cell space, and a discharge channel that is connected to a fluid outlet of the buffer space.

公开(公告)号：US11242943B2

公开(公告)日：2022-02-08

申请号：US16925007

申请日：2020-07-09

Applicant: Shimadzu Corporation

Inventor： Wenjian Lu ,  Shigeaki Shibamoto ,  Kazunori Takahashi ,  Ayaka Sato

IPC: F16K7/17 ,  F16K99/00

Abstract: Provided is a micro-valve having a laminate structure capable of improving sealing performance when a foreign substance is mixed. The micro-valve 10 has a laminate structure and includes a base layer 20 and a diaphragm layer 30. The base layer is formed with an inlet port 23 for introducing a gas into the micro-valve and an outlet port for allowing the gas to flow outside. The diaphragm layer is arranged to face the base layer. The diaphragm layer switches the flowing and blocking of the gas from the inlet port to the outlet port by elastic deformation thereof. The diaphragm layer has a configuration in which a plurality of deformation regions 33 and a plurality of rigid body regions 34 are alternately formed, the deformation region being elastically deformable in accordance with an inflow of a pneumatic fluid into the micro-valve. The diaphragm layer closes at least one of the inlet port and the outlet port by elastic deformation of at least a part of the plurality of deformation regions.

公开(公告)号：US10458961B2

公开(公告)日：2019-10-29

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 ,  G01N35/10 ,  G01N30/86 ,  G01N30/60 ,  G01N30/02

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.

公开(公告)号：US20160103105A1

公开(公告)日：2016-04-14

申请号：US14870208

申请日：2015-09-30

Applicant: SHIMADZU CORPORATION

Inventor： Yuji Nakama ,  Shigeaki Shibamoto ,  Kazunori Takahashi ,  Minoru Kashihara

IPC: G01N30/62 ,  G01N25/18

CPC classification number: G01N30/62 ,  G01N25/18 ,  G01N30/66

Abstract: A thermal conductivity detector that causes a fluid to come into contact with the surface of a heated temperature sensing element, that causes the temperature of the temperature sensing element to change according to the thermal conductivity of the fluid, and that detects the fluid based on a change in the electrical resistance of the temperature sensing element at that time or on a change in the value of a current to be applied to the temperature sensing element is provided. The thermal conductivity detector includes a cell space where the temperature sensing element is accommodated and to which a fluid is introduced and from which the fluid is discharged, a buffer space that is connected to a fluid outlet of the cell space, and a discharge channel that is connected to a fluid outlet of the buffer space.

Abstract translation: 一种热导率检测器，其导致流体与加热的温度感测元件的表面接触，其导致温度感测元件的温度根据流体的热导率而改变，并且基于 提供了当时的温度感测元件的电阻的变化或者要施加到感温元件的电流值的变化。 热传导检测器包括容纳温度感测元件并且流体被引入并且流体被排出的单元空间，连接到电池空间的流体出口的缓冲空间和排出通道， 连接到缓冲空间的流体出口。