| 摘要 |
PURPOSE: A gas cylinder is provided to keep heat of vaporization of liquefied gas constant as inserting a flexible bag having latent heat of an antifreezing solution, oil in the inside of a body of the gas cylinder, absorbing the changeable gas temperature by the external temperature and gas discharge, keeping the gas temperature constant. CONSTITUTION: A body of a gas cylinder(G) has the bottom enclosed and the top with a valve(4). A flexible bag(7) having an antifreezing solution(8), oil, etc. is inserted to an inner gas storage part(6) in the body of the gas cylinder. The temperature of the gas changed by external temperature and gas discharge is absorbed by the antifreezing solution and oil inserted in the flexible bag. The evaporation of the liquefied gas is prevented as increasing the heat of vaporization and decreasing the temperature by the temperature rise of the liquefied gas, and the pressure of constant gas is kept in the inside of the gas cylinder. Even though the amount of the gas stored in the gas cylinder is small in the winter, the temperature of the gas is increased by the latent heat of the antifreezing solution and oil, and whole amount of the gas remaining in the gas cylinder is used.
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