Heat exchanger

Details Heat exchanger Heat exchanger

1996-04-25

1998-08-04

Lazarus, Ira S.

Heat exchange

Radiator core type

Deformed sheet forms passages between side-by-side tube means

165178, 165175, F28D 102

Patent

active

057879737

ABSTRACT:
A heat exchanger includes a header having tube insertion holes and heat transfer tubes, wherein each of the heat transfer tubes has an end portion inserted into a corresponding tube insertion hole. A burr is formed on a wall of the header around each tube insertion hole to extend in a direction toward an interior of the header. The burr has a bent tip portion formed by bending at least a part of a tip portion of the burr inwardly. A tip of the end portion of each heat transfer tube inserted into a corresponding tube insertion hole contacts with the bent tip portion of the burr. The bent tip portion of the burr seals a gap formed between an outer surface of the inserted end portion of the tube and an inner surface of the burr when the header and the tubes are assembled and brazed, thereby preventing leakage of a heat exchange fluid through such a gap. The insertion depth of the tube is reduced by the bent tip portion of the burr, thereby decreasing pressure loss in the header.

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