| 摘要 |
PROBLEM TO BE SOLVED: To provide a pulse tube refrigerator configured to further improve refrigerating capacity by reducing the compression ratio of a pressure vibratory source of the pulse tube refrigerator and increasing the work load of compression and expansion.SOLUTION: A pulse tube refrigerator includes a first channel 21 connected to a compressor 5, a high pressure gas control valve 6, a second channel 22 connected to the compressor, a low pressure gas control valve 4, a third channel 23 and a fourth channel 24 connected to the high temperature end of the pulse tube 1, a high pressure buffer 8 connected to the third channel, a low pressure buffer 10 connected to the fourth channel, a fifth channel 25 which is connected to the first channel, and the third channel or the high pressure buffer, a sixth channel 26 which is connected to the second channel, and the fourth channel or the low pressure buffer, a high pressure switching valve 11 prepared in the fifth channel, and a low pressure switching valve 12 prepared in the sixth channel 26. |
