TEMPERATURE RAISING METHOD FOR PULSE PIPE REFRIGERATING MACHINE

PROBLEM TO BE SOLVED: To provide a temperature raising method for a pulse pipe refrigerating machine with short temperature raising time without the need of additional energy from the outside and further without possibility of any leakage and any trouble. SOLUTION: A temperature raising method for a pulse pipe refrigerating machine is adapted such that it includes a compressor 1, a pulse pipe 4, a high pressure valve 7 disposed on a conduit 8 communicating a compressor discharge outlet and a pulse pipe low temperature end, and a low pressure valve 5 disposed on a conduit pipe 6 for communicating a compressor intake poet and a pulse pipe low temperature end. In the method, the compressor 1 is operated in a state where the high pressure valve 7 is closed and the low pressure valve 5 is opened, and working gas discharged from the compressor discharge outlet is introduced into a pulse pipe high temperature port and is returned to the compressor intake port through the low pressure valve 5 after the gas passes through the inside of the pulse pipe 4 and through a pulse pipe low temperature end.