CRYOGENIC COOLING DEVICE

PURPOSE:To control the movement of heat between a high-temperature end and a low-temperature end to cool and/or heat a heat exchanger in a short period of time and prevent the inside of the vacuum tank of a cooling device from being contaminated by gas leak and the like by a method wherein the high-temperature end of the cryogenic heat exchanger is conducted to the low-temperature end of the same by heat conductors through a thermal switch. CONSTITUTION:The high-temperature end of a heat exchanger 10 in a cryogenic area is conducted to the low-temperature end of the same by heat conductors 16, 17 through a thermal switch 15 while the switching of the thermal switch 15 is effected by a handle 19 and a rod 20 in room temperature side through an elastic body 18. When the high-temperature end of the heat exchanger 10 is cooler than the low-temperature end of the same, a thermal switch 15 is put ON and heat is moved from a pipeline 25 to the pipeline 21 through the heat conductors 16, 17 whereby the low-temperature end is cooled in a short period of time from the outside of the heat exchanger. The thermal switch 15 moves heat by contact and, therefore, the thermal switch will never contaminate a vacuum space wherein the thermal switch is arranged. On the other hand, the low-temperature end may be heated also in a short period of time by the thermal switch in the same manner even when the heat exchanger is being heated.