Patent ID: 11921021
Assignee: KABUSHIKI KAISHA TOSHIBA
Field: Measurement (Instruments)
Classification: CPC G | IPC A  B  C  G

Claim 12:
13. The gas concentration device according to claim 1, further comprising:
a second decompression device that is connected to the second space by a fourth path and configured to reduce a pressure inside the second space;
a first shutter configured to switch the first path between an open state in which a gas can flow and a closed state in which a gas cannot flow;
a second shutter configured to switch the second path between an open state in which a gas can flow and a closed state in which a gas cannot flow; and
a control circuit configured to control the first shutter, the second shutter, the first decompression device, the second decompression device, and the pressure control device, wherein the control circuit is configured to control
an operation in which the first decompression device is configured to reduce the pressure inside the first space in a state where the first shutter is closed,
an operation in which the second decompression device is configured to reduce the pressure inside the second space in a state where the first shutter and the second shutter are closed,
an operation in which the first shutter is configured to switch to an open state,
an operation in which the first shutter is configured to switch to a closed state and the pressure control device reduces a volume of the second space, and
an operation in which the second shutter is configured to switch to an open state.