Double-pipe heat exchanger and manufacturing method thereof

Details Double-pipe heat exchanger and manufacturing method thereof Double-pipe heat exchanger and manufacturing method thereof

2011-07-26

2011-07-26

Ciric, Ljiljana (Lil) V (Department: 3785)

Heat exchange

Non-communicating coaxial enclosures

C165S159000, C165S141000, C165S155000, C165S042000, C165S052000, C165S160000

Reexamination Certificate

active

07984752

ABSTRACT:
A double-tube heat exchanger that is easy to produce, the entire part of which is smoothly bent so that the heat exchanger works as a part of piping, and that has high pressure resistance. In the cross-section perpendicular to the axis of an inner tube (1), there are bag-like or ballon-like bulged sections (7a) directing radially from the center, and openings of the bulged sections (7a) are closed and the head of each bulged section (7a) is in contact with the inner surface of an outer tube (2).

REFERENCES:
patent: 1787904 (1931-01-01), Heyward
patent: 2259433 (1941-10-01), Kitto
patent: 5311661 (1994-05-01), Zifferer
patent: 52-124346 (1977-09-01), None
patent: 54-3658 (1979-01-01), None
patent: 2000-161871 (2000-06-01), None
patent: 2002-13882 (2002-01-01), None

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