Method for operating cryocooler

Abstract

A method for operating a cryocooler, in which the cryocooler includes an expander including an expander motor that is connected to a power source by a power supply cable and is capable of being driven at a power source frequency, the method includes: releasing a connection between the power source and the expander motor by the power supply cable; connecting the power source and the expander motor via an inverter; executing an accelerated cooling operation of the cryocooler in which the power source frequency is converted into an operation frequency higher than the power source frequency by the inverter and the expander motor is driven at the converted operation frequency; and removing the inverter and reconnecting the power source and the expander motor, after the accelerated cooling operation is stopped.

Dependencies are inferred from the claim text.