⏧PROBLEMS] To provide a gas separator which can be reduced in size and weight and can be used even with no power supply on occasion. ⏧MEANS FOR SOLVING PROBLEMS] At least a part of a bulkhead for partitioning the exterior and interior of a gastight container (2) is constituted to include a gas separation membrane (13), and the bulkhead is arranged to move and/or deform at least partially through action of external force thus reducing the inner volume of the gastight container. The gas separation membrane is arranged to separate/discharge at least a part of gas g1 contained in the gas G from the gas G filling the gastight container to the outside of the container when the total pressure P in the gastight container exceeds a total pressure P1 (PឬP1) due to reduction in volume. When the total pressure in the gastight container reaches P2 (P2ᡶP1) due to further reduction in volume in the gastight container, a gas take-out valve interconnects the interior and exterior of the gastight container and can discharge gas g2 remaining in the gastight container to the outside.
B01D 53/22 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by diffusion
A23L 3/3418 - Preservation of foods or foodstuffs, in general, e.g. pasteurising, sterilising, specially adapted for foods or foodstuffs by treatment with chemicals in the form of gases, e.g. fumigation; Compositions or apparatus therefor in a controlled atmosphere, e.g. partial vacuum, comprising only CO2, N2, O2 or H2O
A63B 41/12 - Tools or devices for blowing up or closing balls
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