公开(公告)号：US20190137163A1

公开(公告)日：2019-05-09

申请号：US16182878

申请日：2018-11-07

Applicant: Chart Inc.

Inventor： John Corey ,  Keith Gustafson ,  Buzz Bies

IPC: F25D11/04 ,  F25D19/00 ,  F25D17/06

Abstract: A cryogenic freezer features a dewar defining a storage space. A reservoir is positioned within or adjacent to the storage space and is configured to contain a cryogenic liquid with a headspace above the cryogenic liquid in a reservoir interior space that is sealed with respect to the storage space. A refrigeration module is in heat exchange relationship with the reservoir. A sensor is configured to determine a temperature or pressure within the reservoir. A system controller is connected to the sensor and the refrigeration module and configured so that the refrigeration module is adjusted to provide additional cooling to the reservoir when a pressure or temperature within the headspace increases.