| 摘要 |
PURPOSE:To prevent the generation of clogging due to freezing by controlling the quantity of heat infiltrating into freezing medium housing containers as well as to suppress the quantity of the freezing medium in the freezing medium housing container discharged to outside in the form of vapor by a method wherein an inserting member having excellent coefficient of thermal conductivity is inserted into the air-exhausting tube of the freezing medium housing containers. CONSTITUTION:An inserting member 8 consisting of a steel material or an aluminum material having an excellent heat conductivity coefficient is provided in an air exhausting tube 7, and a fin 9 to be used for heat exchange is provided on the end part of the inserting member 8. The constitution other than the above is same as that heretofore in use. When the degree of cooling for the freezing medium housing containers 3 and 4 of a refrigerator 6 is larger than the quantity of heat infiltrating into the freezing medium housing containers 3 and 4 from outside, the inserting member 8 becomes the heat-conduction path into the freezing medium housing containers 3 and 4 from outside, the quantity of heat infiltrated into the freezing medium housing containers 3 and 4 from outside is increased, and the inside of the freezing medium housing containers is prevented from becoming negative pressure. Also, on the contrary, when the cooling capacity of the refrigerator 6 is smaller than the quantity of infiltrated heat, the quantity of heat infiltrated into the freezing medium housing from outside is reduced by the inserting member 8 cooled by evaporated gas, and the quantity of the freezing medium 2 to be discharged to outside in the form of vapor can be suppressed.
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