| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a multitubular heat exchanger free from formation of a recessed part forming a condensed water pool in the heat exchanger when used, between a thick tube part and a tapered tube part. <P>SOLUTION: This heat exchanger includes a plurality of inner tubes 114, 114, ..., through which a first fluid passes, and an outer tube 117 through which a second fluid passes, and the inner tubes 114 include the thick tube parts 114a at both ends, a thin tube part 114b at the middle, and the tapered tube part 114c between the thin tube part 114b and the thick tube part 114a. In this multitubular heat exchanger, the inner tubes 114, 114, ..., are in sealed contact at the thick tube parts 114a and integrally held by the outer tube 117, so that a second fluid pass-through gap S is formed between the outside of each inner tube 114 and the inside of the outer tube 117. The inner tube 114 is tapered at one side in the vertical direction of the tapered tube part 114c, and its surface (bottom surface) to be on the downside when the inner tube 114 is used, is provided as a longitudinal flat surface. <P>COPYRIGHT: (C)2012,JPO&INPIT |
