| 摘要 |
PROBLEM TO BE SOLVED: To provide a heat pipe for low temperature, functioning as a heat medium which is active in a specific temperature range between +50 deg.C and -50 deg.C. SOLUTION: Part of this meandering thin heat pipe is constituted as an accumulator or a small-sized accumulator tank is provided together. Condensable two-phase liquid of >=+50 deg.C in critical temperature, >=50 kg/cm2 in critical pressure, and <=0 deg.C in boiling point is charged as working liquid, and the temperature of the accumulator is always controlled to <=+50 deg.C. As an example, carbon dioxide is used as the working liquid and a Peltier-effect applied temperature control means is applied as a cooling means, so that the temperature of a semiconductor element as a heating means can be cooled to -20 deg.C.
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