公开(公告)号：US09410730B1

公开(公告)日：2016-08-09

申请号：US14932064

申请日：2015-11-04

Applicant: Peter David Keefe

Inventor： Peter David Keefe

IPC: F25D21/02

CPC classification number: G01K11/06

Abstract: A container has a porous support member affixed thereinside defining upper and lower chambers and a liquid partly filling the container. The liquid is frozen in the upper chamber. The container is oriented so that the upper chamber is gravitationally above the lower chamber, wherein the frozen liquid remains in the upper chamber. The container is placed in a cold zone of a freezer. Thereafter, the presence of the liquid in the lower chamber is indicative that a thaw episode has occurred. The presence of the liquid frozen in the lower chamber is indicative that the thaw episode has been followed by a refreeze event.

Abstract translation: 容器具有固定在其上的多孔支撑构件，限定上腔室和下腔室以及部分地填充容器的液体。 液体被冻结在上腔室中。 容器被定向成使得上腔室重力地在下腔室的上方，其中冷冻液体保留在上腔室中。 将容器放置在冷冻室的冷区中。 此后，下腔室中的液体的存在表明发生了解冻事件。 冷冻在下腔室中的液体的存在表示解冻事件之后是重新冻结事件。