Patent ID: 8276470

Claim:
A device for introducing a gas for an analysis device, which includes: a gas synthesis unit that synthesizes a plurality of types of gases in a mixing chamber; a pressure adjusting unit that introduces the gas synthesized in the gas synthesis unit for pressure reduction; a gas switching unit including a gas switching valve that performs switching so as to introduce the depressurized gas from the pressure adjusting unit to an analysis device main body, and a gas analysis device that analyses a component of the synthesized gas, wherein the gas synthesis unit includes a plurality of gas introducing paths leading from a plurality of gas sources to the mixing chamber via a pressure valve, a path for exhaustion from the mixing chamber to exterior via an open/close valve, and a path for introduction from the mixing chamber to the pressure adjusting unit via a flow-adjusting valve, wherein the pressure adjusting unit includes an introducing chamber that introduces gas from the gas synthesis unit, a path provided with a pump that reduces the pressure of the gas introduced in the introducing chamber to a pressure ranging from 0.1 Pa to 0.1 MPa, and a path leading from the introducing chamber to the gas switching unit, wherein the gas switching unit includes a path guiding the gas from the pressure adjusting unit to the analysis device via the gas switching valve, and wherein the gas switching unit includes a path guiding the depressurized gas from the pressure adjusting unit to the analysis device via the gas switching valve, and the gas switching valve performs switching so as to introduce the depressurized gas to the inside of the analysis device main body maintained at 10 −2 Pa or less.