| 摘要 |
Apparatus for cooling a cooled equipment, comprising: a cryogen vessel ( 10 ) housing the cooled equipment; a gaseous cryogen filling the cryogen vessel; a refrigerator ( 12 ) having a cooling surface exposed to the interior of the cryogen vessel ( 10 ) so as to cool the gaseous cryogen; and a gas current generator arranged to cause circulation of the gaseous cryogen freely within the cryogen vessel, such that the gaseous cryogen is cooled by the refrigerator, and is warmed by heat from the cooled equipment, thereby cooling the cooled equipment.
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