US 12,129,971 B2
Cryostat devices for magnetic resonance imaging and methods for making
Lijun Zou, Shanghai (CN); Yan Guo, Shanghai (CN); Xiaogang Yang, Shanghai (CN); Yingping He, Shanghai (CN); and Yanqing Cai, Shanghai (CN)
Assigned to SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed by SHANGHAI UNITED IMAGING HEALTHCARE CO., LTD., Shanghai (CN)
Filed on Nov. 29, 2021, as Appl. No. 17/456,654.
Application 17/456,654 is a division of application No. 16/024,765, filed on Jun. 30, 2018, granted, now 11,187,381.
Claims priority of application No. 201710906373.9 (CN), filed on Sep. 29, 2017; application No. 201711054371.8 (CN), filed on Oct. 31, 2017; and application No. 201711195403.6 (CN), filed on Nov. 24, 2017.
Prior Publication US 2022/0082209 A1, Mar. 17, 2022
Int. Cl. F17C 3/00 (2006.01); F17C 3/08 (2006.01); F25B 9/14 (2006.01); G01R 33/38 (2006.01); G01R 33/3815 (2006.01)
CPC F17C 3/085 (2013.01) [F25B 9/14 (2013.01); G01R 33/3804 (2013.01); G01R 33/3815 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A cryostat comprising:
an inner vessel configured to accommodate one or more superconducting coils;
an outer vessel encompassing the inner vessel; and
a thermal shield configured between the outer vessel and the inner vessel; and
a cooling assembly configured to cool the one or more superconducting coils, the cooling assembly including:
at least one heat exchanger configured to absorb heat generated by the one or more superconducting coils using a cryogen;
one or more tubes in fluid communication with the at least one heat exchanger for transferring the cryogen;
a refrigeration device configured to cool the cryogen after the cryogen cools the one or more superconducting coils; and
a recycling container configured to accommodate the cryogen, the recycling container being in fluid communication with the one or more tubes and the refrigeration device;
wherein
the recycling container has an opening located underneath the refrigeration device,
at least a portion of the refrigeration device is located within the recycling container via the opening,
the at least one heat exchanger, the one or more tubes, the refrigeration device, and the recycling container constitute a communicating vessel and the communicating vessel is open as a result of the opening, and
a certain volume of the cryogen overflows from the communicating vessel through the opening to the inner vessel when the communicating vessel is full.