| 摘要 |
PROBLEM TO BE SOLVED: To suppress temperature increase at a low-temperature end by providing a porous plate in a pulse pipe and preventing a working medium being discharged into the pulse pipe from directly reaching the low-temperature end in a refrigerating machine with cold storage equipment for exchanging heat with the working medium that is transported between a compressor and the pulse pipe. SOLUTION: A working medium from a compressor 1 flows into cold stage equipment 3 through a high-pressure valve 2a, then flows into a pulse pipe 4, and then pushes the working medium already existing in the pulse pipe 4 toward a high-temperature end 41. Then, although the working medium passes through an orifice 6 and flows into a middle pressure chamber 7, compression heat being generated at the high-temperature end 41 of the pulse pipe 4 is emitted to the outside by a cooling fin 8. After that, when the high-pressure valve 2a is closed and the low-pressure valve 2b is opened, the working medium in the middle pressure chamber 7 momentarily passes through the orifice 6 and then flows into the pulse pipe 4. However, since a porous plate 43 is provided in the pulse pipe 4, the high-pressure gas cannot reach the low-temperature end 42 of the pulse pipe 4.
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