| 摘要 |
PROBLEM TO BE SOLVED: To secure the satisfactory circulation of refrigerant by separating the refrigerant vapors receiving heat from a heating element 3 to boil from the condensate cooled by a radiation part 4 to be refluxed and inhibiting the exchange of heat between both of them (the refrigerant vapors and the condensate). SOLUTION: A refrigerant container 2 has a barrier part 5 separating the refrigerant vapors receiving heat from the heating element 3 to boil from the condensate cooled by the radiation part 4 to be refluxed by partitioning a part of the inner space 2a of its own into a heating element side passage 2b and a radiation part side passage 2c in a thickness direction. This barrier part 5 forms a heat insulating space 5a with the communication with the inner space 2a storing refrigerant shut off. Thereby, the conduction of the heat of the refrigerant vapors boiled in the heating element side passage 2b to the liquid refrigerant in the radiation part side passage 2c can be reduced, and the boil of the refrigerant in the radiation part side passage 2c is inhibited, so as to secure the satisfactory circulation of refrigerant without the hard collision of the condensate refluxed from the radiation part 4 with the refrigerant vapors.
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