Patent ID: 11959702
Assignee: L'AIR LIQUIDE, SOCIETE ANONYME POUR L'ETUDE ET L'EXPLOITATION DES PROCEDES GEORGES CLAUDE
Field: Chemical engineering (Chemistry)
Classification: CPC F  B  Y | IPC B  F

Claim 1:
2. The air separation device according to claim 1, further comprising a refrigerator automatic drive unit which is configured to:
automatically operate the standby-side first refrigerator or second refrigerator if the temperature of the feed air introduced into the pre-purification unit is at or above a first temperature threshold for a first duration;
automatically stop the refrigerator that is to be put on standby, selected from among the first refrigerator and the second refrigerator, if the temperature of the feed air introduced into the pre-purification unit is maintained at or below a second temperature threshold lower than the first temperature threshold for a second duration; and
automatically stop the first refrigerator and the second refrigerator if the temperature of the feed air sent to the upstream-side first refrigerator or second refrigerator is equal to or less than a third temperature threshold and the temperature of the feed air introduced into the pre-purification unit is maintained at or below the second temperature threshold for the second duration.