| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulse tube refrigerator, having high efficiency and practicability, and especially a practicable two-stage pulse tube refrigerator. SOLUTION: This pulse tube refrigerator includes: a first refrigerating part including a first coldness storage device, a first pulse tube having a first high temperature end and a first low temperature end, a first passage control means and a first buffer tank, which are sequentially connected to a vibration generator; a second refrigerating part including a first coldness storage device, a second coldness storage device, a second pulse tube having a second high temperature end and a second low temperature end, a second passage control means and a second buffer tank, which are sequentially connected to a high pressure passage and a low pressure passage of the vibration generator; a first passage connecting the first coldness storage device and the vibration generator; a second passage connecting the first passage control means and the first pulse tube; and a third passage connecting the second passage control means and the second pulse tube, wherein the pulse tube refrigerator further includes a by-pass passage connecting the respective passages and a passage, a cylinder provided in the by-pass passage, and a displacer provided to reciprocate in the axial length direction of the cylinder. COPYRIGHT: (C)2008,JPO&INPIT
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