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(11) | EP 2 469 211 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Multitubular heat exchanger |
| (57) Provided is a heat exchanger including a plurality of inner tubes (114) through which
a first fluid passes and an outer tube (117) through which a second fluid passes,
the inner tubes (114) including thick tube portions (114a) at both ends, a thin tube
portion (114b) at the middle, and a tapered tube portion (114c) between the thin tube
portion (114b) and the thick tube portion (114a). Provided is a multitubular heat
exchanger for which the inner tubes (114) are in sealed contact at the thick tube
portions (114a) and held and integrated 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 upper and lower direction of the tapered tube portion (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. Thus, the multitubular heat exchanger according to
the present invention does not allow forming between the thick tube portion (114a)
and the tapered tube portion (114c) a recess portion forming a condensed water pool
in the heat exchanger when used.
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