ULTRA-LOW TEMPERATURE STORAGE CONTAINER AND ULTRA-LOW TEMPERATURE DEVICE

摘要

An ultra-low temperature storage container (10A) that can maintain ultra-low temperatures over long periods, even when operation of the freezer stops, and has a structure wherein a solid refrigerant tank (12) that houses a solid refrigerant that is cooled by a freezer (25) and a liquid refrigerant tank (21) that holds a liquid refrigerant and is disposed to surround the solid refrigerant tank (12) with a constant space are accommodated inside a vacuum container (11), and is further configured so that liquid refrigerant that is generated in the solid refrigerant tank (12) by the melting of the solid refrigerant when the freezer (25) stops will flow spontaneously into the liquid refrigerant tank (21), and radiant penetrating heat from the vacuum container (11) is consumed as latent heat of vaporization of the liquid refrigerant in the liquid refrigerant tank (21).