公开(公告)号：US20240142172A1

公开(公告)日：2024-05-02

申请号：US18279629

申请日：2022-03-02

申请人： GEA Lyophil GmbH

发明人： Thomas Heinrich Ludwig Beutler ,  Maximilian Toennessen ,  Frank Krüger ,  Olaf Plassmann

IPC分类号： F26B5/06 ,  F25B9/00 ,  F25B41/20

CPC分类号： F26B5/06 ,  F25B9/008 ,  F25B41/20

摘要： A freeze dryer that includes a product chamber configured to accommodate products to be freeze-dried; a condenser connected to the product chamber and configured to trap water during a freeze-drying process; a product chamber cooling circuit configured to cool the product chamber, the product chamber cooling circuit having a first heat transfer fluid; a condenser cooling circuit configured to cool the condenser, the condenser cooling circuit having a second heat transfer fluid and being separate from the product chamber cooling circuit; a first additional cooling circuit having carbon dioxide or ammonia or liquid nitrogen as refrigerant; and a first heat exchanger configured to transfer heat between the condenser cooling circuit and the first additional cooling circuit.