US 12,345,462 B2
Low-temperature storage system
Koichi Ishikawa, Osaka (JP)
Assigned to TSUBAKIMOTO CHAIN CO., Osaka (JP)
Filed by TSUBAKIMOTO CHAIN CO., Osaka (JP)
Filed on Jun. 14, 2023, as Appl. No. 18/209,777.
Application 18/209,777 is a continuation of application No. PCT/JP2021/033893, filed on Sep. 15, 2021.
Claims priority of application No. 2020-209379 (JP), filed on Dec. 17, 2020.
Prior Publication US 2023/0417472 A1, Dec. 28, 2023
Int. Cl. F25D 25/04 (2006.01); B01L 1/02 (2006.01); F25D 17/04 (2006.01); F25D 17/06 (2006.01)
CPC F25D 17/06 (2013.01) [B01L 1/025 (2013.01); F25D 17/042 (2013.01); F25D 25/04 (2013.01); B01L 2300/10 (2013.01); B01L 2300/1894 (2013.01); F25D 2317/0411 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A low-temperature storage system comprising:
a low-temperature storage chamber storing a storage object at a low temperature; and a loading/unloading mechanism for loading and unloading the storage object into and out of the low-temperature storage chamber,
the loading/unloading mechanism including an entry/exit preparation chamber attached to the low-temperature storage chamber and divided from an external environment and the low-temperature storage chamber,
the entry/exit preparation chamber including a first anteroom having a first interior space controlled to maintain a lower dew point D1 than that of the external environment, and a second anteroom disposed between the first anteroom and the low-temperature storage chamber and having a second interior space controlled to maintain a dew point D2 that is between the dew point D1 in the first anteroom and a dew point D0 in the low-temperature storage chamber,
the system further comprising a first gas supply line that supplies dry purge air having the dew point D1 to the first anteroom, a second gas supply line that supplies first dry air having the dew point D1 to the first anteroom, a third gas supply line that supplies second dry air having the dew point D2 to the second anteroom, and a single dry air generator for the first to third gas supply lines.