Thermal analysis apparatus

Patent metadata

Field	Value
Publication number	US-12529635-B2
Application number	US-202318241342-A
Country	US
Kind code	B2
Filing date	Sep 1, 2023
Priority date	Sep 2, 2022
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

A configuration is provided in which outside air is taken as a carrier gas into a carrier gas flow path (A, B). A CO 2 sensor (specific gas detection sensor) ( 71 ) for detecting a CO 2 gas desorbed from a sample is installed in a component gas detector ( 70 ). A CO 2 sensor (air-containing specific gas detection sensor) ( 54 ) for detecting a CO 2 gas contained in air taken into the carrier gas flow path by a blower fan ( 51 ) is installed separately. A CO 2 gas detection amount detected by the air-containing specific gas detection sensor ( 54 ) is subtracted from a CO 2 gas detection amount detected by the specific gas detection sensor ( 71 ) to calculate a detection amount of the CO 2 gas desorbed from the sample.

First claim

The invention claimed is:

1 . A thermal analysis apparatus including a heating furnace for heating a sample placed therein, a component gas detector for detecting a component gas desorbed from the sample by heating, and a carrier gas flow path for carrying the component gas desorbed from the sample inside the heating furnace to the component gas detector by a carrier gas, comprising:
an air intake unit for taking in outside air as a carrier gas into the carrier gas flow path; a specific gas detection sensor that is provided in the component gas detector and detects a specific component gas desorbed from the sample; and an air-containing specific gas detection sensor for detecting the same gas as a specific component gas to be detected by the specific gas detection sensor from the air taken into the carrier gas flow path by the air intake unit, wherein a gas detection amount detected by the air-containing specific gas detection sensor is subtracted from a gas detection amount detected by the specific gas detection sensor to detect a detection amount of the specific component gas desorbed from the sample.

2 . The thermal analysis apparatus according to claim 1 , wherein the carrier gas flow path comprises:
a heating-furnace internal passing flow path that has a gas supply port and a gas exhaust port, supplies the carrier gas from the gas supply port into the heating furnace, passes the carrier gas through an inside of the heating furnace in which the sample is placed, and exhausts the carrier gas from the gas exhaust port; and a heating-furnace external passing flow path that passes through an outside of the heating furnace and reaches the component gas detector, and the gas exhaust port of the heating-furnace internal passing flow path communicates with the heating-furnace external passing flow path.

3 . The thermal analysis apparatus according to claim 2 , further comprising a housing in which the heating furnace is installed, and the housing is provided with each of the gas supply port in the heating-furnace internal passing flow path and a gas supply port for supplying the carrier gas to the heating-furnace external passing flow path.

4 . The thermal analysis apparatus according to claim 2 , wherein the heating-furnace external passing flow path is configured to cause a carrier gas of a larger flow rate to flow to the component gas detector than the heating-furnace internal passing flow path.

5 . The thermal analysis apparatus according to claim 2 , further comprising a heater for restraining solidification of a gas carried from the heating-furnace external passing flow path to the component gas detector.

6 . The thermal analysis apparatus according to claim 1 , further comprising:
a gas flowmeter for measuring a flow rate of the carrier gas flowing into the component gas detector; and a gas flow rate adjuster for adjusting the flow rate of the carrier gas flowing into the component gas detector.

Assignees

• Rigaku Denki Co Ltd

Inventors

• Noritake Koichiro

Classifications

• G01N2030/008

  Thermal desorption · CPC title

• G01N2030/085

  using absorbing precolumn · CPC title

• G01N2030/128

  Thermal desorption analysis · CPC title

• G01N1/405

  by adsorption or absorption · CPC title

• G01N33/0009

  General constructional details of gas analysers, e.g. portable test equipment (devices for withdrawing samples in the gaseous state G01N1/22) · CPC title