|
(11) | EP 4 350 249 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
|
|
|
|
|||||||||||||||||||||||||||
| (54) | METHOD FOR OPERATING CRYOCOOLER AND CRYOCOOLER |
| (57) An initial cooling time of a cryocooler (10) is shortened. A method for operating
a cryocooler 10 includes: connecting a second compressor 80 in series with a first
compressor 12 on a high pressure line 63 or a low pressure line 64; connecting a buffer
volume 70 to the low pressure line 64 via a supply valve 72; executing initial cooling
for cooling an expander 14 from an initial temperature to a cryogenic temperature
in a state where the second compressor 80 and the buffer volume 70 are connected to
the cryocooler 10; and executing a steady operation of maintaining the expander 14
at the cryogenic temperature after the initial cooling. The execution of the initial
cooling includes supplying a working gas to the expander 14 by using the first compressor
12 and the second compressor 80, and controlling the supply valve 72 to keep a pressure
of the high pressure line 63 within a preset appropriate pressure range based on the
measured pressure of the high pressure line 63.
|