摘要 |
PROBLEM TO BE SOLVED: To improve sealing performance of fin joint faces by effectively performing degasification similar as that by substantially narrowing a fin width, without actually narrowing the fin width by forming opening parts such as a slit on an outer periphery of a tube body part of a thin heating tube unit. SOLUTION: In this thin heating tube unit 4 of a thin multitubular heat exchanger composed of the thin tube body parts 41, 41a, 41b exchanging heat between inner fluid and outer fluid, and heat transfer fins 42, 42a, 42b mounted on the tube body parts 41, 41a, 41b, the opening parts 43a, 43b such as slits penetrated through both face sides of the fins are formed on the heat transfer fin parts 42, 42a, 42b. According to this constitution, as the effective degasification similar as that by narrowing the fin width, can be substantially performed by the presence of the opening parts 43a, 43b such as the slits penetrated through both face sides of the heat transfer fins 42, 42a, 42b, the sealing performance and pressure tightness of the fin joint faces can be effectively improved. COPYRIGHT: (C)2006,JPO&NCIPI
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