Patent ID: 8677770

Claim:
A supercooling method, comprising: a first cooling step of cooling a stored object toward a cooling temperature below a phase transition temperature thereof; a step of judging whether the stored object is released from a supercooled state in the first cooling step; a step of thawing the stored object when the stored object is released from the supercooled state; and a second cooling step of cooling the stored object toward a cooling temperature below zero that is higher than the lowest temperature of the stored object before the release of the supercooled state, wherein the first cooling step is continuously performed when the object is maintained in the supercooled state, wherein the judging step, the thawing step and the second cooling step are repeatedly performed, wherein a rise width of the cooling temperature is inversely proportional to a repetition frequency of the judging step, the thawing step and the second cooling step, wherein the thawing step comprises a step of temporarily cooling the object to the cooling temperature lower than the phase transition temperature and a step of judging whether the thawing is finished according to the temperature variations of the object during the thawing step, and wherein the second cooling step is carried out when the thawing of the stored object is finished.