| 摘要 |
863961 Liquefaction of gases HYMATIC ENGINEERING CO Ltd 12 Jan 1960 [23 Jan 1959] 2529/59 Headings F4H and HG13 Prevention of blocking of an expansion orifice 8 by frozen impurities such as water and carbon dioxide contained in compressed gas to be liquefied by expansion at said orifice after being cooled in a coil 11 in heat exchange with cold vapour resulting from the expansion is effected by passing the cold impurity-containing gas through a porous membrane 9 located adjacent and upstream of the orifice 8 and subjecting the gas stream to a relatively small pressure drop. The orifice 8 is inclined at an angle of between 30 degrees and 60 degrees to the longitudinal axis of the apparatus thereby directing the jet of liquefied gas against a porous angularly adjustable deflector 10 which in turn distributes the cold liquid over a wide area at the bottom of a dewar flask 4 having on its outer surface photoelectric cells. The member 9 may comprise sintered metal, wire mesh or ceramic material of 5 micron pore size.
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