EBULLIENT COOLER, HEAT EXCHANGER EQUIPPED WITH EBULLIENT COOLER AND EBULLIENT COOLING APPARATUS EQUIPPED WITH EBULLIENT COOLER

摘要

PROBLEM TO BE SOLVED: To enhance the heat exchanging performance and provide a compact ebullient cooling apparatus by setting a fin pitch of heat receiving fins mounted on an ebullient cooling tube which constitutes a boiling portion narrower than a fin pitch of radiation fins mounted on an ebullient cooling pipe which constitutes a condensing portion. SOLUTION: A plurality of ebullient cooling tubes 4 in which a coolant of an ebullient cooling apparatus 3 is filled are communicated with each other by means of a pair of connecting pipes 5. A plurality of heat transmitting fins 6 are mounted on the outer surface of the ebullient cooling tubes 4. The ebullient cooling tubes 4 pass through a plurality of through holes formed in a fluid separation plate 2. A coolant reservoir (a boiling portion) 7 is provided at a high temperature air side of the fluid separation plate 2 while a coolant vapor reservoir (a condensing portion) 8 is provided at a low temperature air side of the fluid separation plate 2. The heat transmitting fins 6 are made of heat receiving fins 6a of the boiling portion 7 and heat radiating fins 6b of the condensing portion 8. The fin pitch of the heat receiving fins 6a is set narrower than the fin pitch of the heat radiating fins 6b at a rate of, for example, 50 to 65%. Although an effective heat exchanging area of the boiling portion 7 is set to be smaller than an effective heat exchanging area of the condensing portion 8, since the heat exchanging performance of the boiling portion 7 is improved with its narrower fin pitch, a size of the apparatus in a vertical direction can be reduced thus making the apparatus compact.