| CPC F28D 15/0233 (2013.01) [F28D 15/0266 (2013.01); H05K 7/2039 (2013.01)] | 6 Claims |
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1. A boiling cooler comprising:
a boiling part including a heat receiving surface thermally connected to a heat source, the boiling part boiling a refrigerant contained in an internal space thereof;
a condensing part arranged in a horizontal direction with respect to and spaced apart from the boiling part, the condensing part condensing a refrigerant gas by heat exchange with an external fluid; and
a connecting pipe that connects the boiling part to the condensing part and circulates the refrigerant; wherein
the condensing part includes:
a plurality of stages of refrigerant passages aligned in a height direction perpendicular to the horizontal direction; and
a first external passage for the external fluid provided between the plurality of stages of refrigerant passages, and a second external passage for the external fluid provided on an outer surface of at least one of an uppermost refrigerant passage and a lowermost refrigerant passage; and
a range in the height direction in which the internal space of the boiling part is formed overlaps, in the height direction, both of a range in the height direction in which the lowermost refrigerant passage of the condensing part is formed and a range in the height direction in which the uppermost refrigerant passage of the condensing parts is formed,
the connecting pipe is provided separately from the refrigerant passages and connected to the boiling part at one end and to the condensing part at an opposite end, and
the second external passage includes heat transfer fins provided inside of the second external passage.
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