Patent ID: 6904959

Claim:
Heat exchanger comprising: a bearing structure ( 2 ), which defines at least a main chamber ( 3 ); a predetermined number of tubes ( 4 ), which cross said main chamber ( 3 ): at least a secondary chamber ( 5 ), which is in fluid connection with said tubes ( 4 ) and fluid proof with respect to the main chamber ( 3 ); at least a tube plate ( 6 ), which shows the adequate seats ( 7 ) for housing said tubes ( 4 ), wherein said tube plate ( 6 ) is interposed between the main chamber ( 3 ) and the secondary chamber ( 5 ); sealing means ( 8 ) interposed at least between the main chamber ( 3 ) and the seconday chamber ( 5 ) to avoid fluid flow-by, wherein it further comprises: a containing plate ( 9 ), which shows a respective holding seat ( 10 ) for each tube ( 4 ), wherein said holding seat ( 10 ) is crossed by a tube ( 4 ) and houses the sealing means ( 8 ); and each holding seat ( 10 ) being delimited in radial direction by the containing plate ( 9 ), externally, and by the surface of the tube ( 4 ), internally, and the holding seat ( 10 ) being also axially delimited, on the one side, by the tube plate ( 6 ) and, on the other side, by the clampling plate ( 11 ). The sealing means ( 8 ) comprising at least a first and a second sealing element ( 13 a , 13 b ) for each tube ( 4 ), wherein said sealing elements ( 13 a , 13 b ) surround the tube ( 4 ) and are housed in the holding seat ( 10 ) defined by the containing plate ( 9 ).