COOLING DEVICE

摘要

PURPOSE: A cooling device is provided to reduce manufacturing costs of the cooling device and to simplify a structure of the cooling device. CONSTITUTION: A cooling device comprises a first cooling unit(10) and a second cooling unit(20). The first cooling unit makes liquid nitrogen flow, thereby cooling the same at a first temperature. The second cooling unit mounted on a surface of the first cooling unit operates at a temperature lower than the first temperature and is composed of a Peltier effect device. The first cooling device cools the liquid nitrogen at a temperature of -196°C, which is the boiling point of liquid nitrogen. The second cooling device operates at a temperature lower than -196°C.