Patent ID: 9671159
Date: 2017-06-06
CPC Classifications: F17C,F25B,F25D,F25J

Claim:
1. A liquefier comprising: a Dewar having a storage portion for and a neck extending therefrom, the storage portion storing an amount of liquefied gas; a cryocooler; a liquefaction chamber at least partially disposed within the neck of the Dewar, the liquefaction chamber further comprising: a heat exchange region collectively defined by the neck and the liquefaction chamber, the heat exchange region structured to provide counter-flow heat exchange by receiving exhaust gas exhausted from the storage portion to cool the liquefaction chamber; a plate separating the liquefaction region and the heat exchange region from the storage portion; a conduit disposed within the plate for selectively placing the fluid collection reservoir into fluid communication with the storage portion; at least one heat exchange valve disposed within the plate, and coupled to a CPU for selectively circulating the exhaust gas from the storage portion to the heat exchange region; a gas inlet in fluid communication with the liquefaction chamber; and a liquid transfer port in fluid communication with the storage portion of the Dewar for accessing liquefied gas stored within the storage portion.