| 摘要 |
A liquid helium recondensation device which includes a liquid helium storage tank (1) and a refrigerating machine (5) that recovers the helium gas vaporized in the storage tank and cools and liquefies the helium gas, and which can return the cooled helium gas cooled by or the liquid helium liquefied by the refrigerating machine to the storage tank, the device comprising a line (9c) whereby the high temperature helium gas elevated in temperature in the liquid helium storage tank is fed to the refrigerating machine and the cooled helium gas from the latter is then fed to the upper region in the storage tank, and lines (9b, 9a) whereby the low temperature helium gas in the vicinity of the liquid level of the liquid helium in the liquid helium storage tank is fed to the refrigerating machine for liquefyin g and the liquid helium from the latter is fed to the storage tank.
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