Laminated heat exchanger
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United States of America Patent
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Apr 13, 1999
Grant Date -
N/A
app pub date -
Mar 24, 1998
filing date -
Mar 31, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In order to prevent a communicating pipe from becoming damaged by water (in particular drain water) collecting in the gap formed between the tube element at one end of a heat exchanger that is constituted of a flat plate and a formed plate and the communicating pipe through defective brazing and repeatedly freezing and melting, a flange (32) and a bonding margin (11) continuous to the flange (32) are notched off over almost the entire circumference at the center on the inside of an indented portion (9) in a formed plate (16) which, together with a flat plate (15), constitutes a tube element (3b). Thus, while the communicating pipe (27) comes in contact with the internal surface of a flange (29) of a pipe connection hole (28) of the flat plate (15), it does not come in contact with the formed plate (16), thereby forming a gap bounded by the flat plate (15), the formed plate (16) and the communicating pipe (27).
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