Cooling device for power semiconductor switching elements

Heat exchange – Intermediate fluent heat exchange material receiving and... – Plural intermediate fluent heat exchange materials

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16510433, 165108, 361385, F28D 1502, H01L 23427

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active

051955776

ABSTRACT:
A boiling type cooling device for cooling power semiconductors includes an evaporator containing an aqueous solution of ethylene glycol as a cooling medium, a condenser; and a vapor and liquid return pipe. According to a first aspect, the lowest portion of the condensor is at a level higher than the top surface of the cooling medium in the evaporator, the bottom surfaces of the condensor being tilted downward toward the top end of the liquid return pipe. According to another aspect, a pump is provided in the liquid return pipe for driving cooling medium to the evaporator. According to still other aspects, the liquid return pipe is covered with a heat insulating material, or a rubber string extends centrally therewithin. A deaeration device for the aqueous solution of ethylene glycol includes two separate deaeration baths and a mixing bath.

REFERENCES:
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patent: 1787562 (1931-01-01), Barlow
patent: 1792520 (1931-02-01), Weinhardt
patent: 2110774 (1938-03-01), Privett
patent: 3255813 (1966-06-01), Besson et al.
patent: 3561229 (1971-02-01), Levin
patent: 3609991 (1971-10-01), Chu et al.
patent: 4293030 (1981-10-01), Rambach
Kobayashi et al., "Development of High Power Semiconductor Equipment by Means of Boiling and Condensing Heat Transfer", Mitsubishi Electric Corporation Technical Journal, vol. 48, No. 2, Feb. 1974, pp. 229-239.
Jacquelin et al., "Refroidissement de Systems Electroniques de Puissanace", Sep. 1989, pp. 38-47.

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