| 摘要 |
<p>A miniaturized high efficiency closed cycle cryogenic cooling system employs an integral electrically-actuated diaphragm compressor (22) and expander (24) arranged to enable the work of expansion of a portion of compressed gas to be applied to the compressor (22) to reduce the external input power requirements of the compressor. Another portion of compressed gas is expanded through an expansion valve (34) and liquefied at the cryogenic temperature. The expanded gas from the expander (24) and the expansion valve (34) is returned to the compressor (22) through a heat exchanger (26, 28) to pre-cool the portions of compressed gas prior to expansion. </p> |
