| 摘要 |
PROBLEM TO BE SOLVED: To reduce the incurring of an on-off valve loss and to improve refrigerating efficiency, in a pulse pipe refrigerator. SOLUTION: A buffer space (a buffer tank 50) is communicated with a second space 47 in a cylinder member 41 and communicated with a second high pressure on-off valve 23 and a second low pressure on-off valve 24, and an on-off valve 25 on the buffer side is located between the buffer space (the buffer tank 50) and the second space 47. By opening the on-off valve 25 on the buffer side before the second high pressure on-off valve 23 or the second low pressure on-off valve 24 are opened, a pressure in the second space 47 is adjusted to a middle pressure, a differential pressure when the on-off valves 23 and 24 are opened is decreased, and the incurring of an on-off valve loss is decreased.
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