| 摘要 |
A gas boiler with a main heat exchanger (5) for producing hot water extends along a vertical axis (A1), and is provided with a burner (4) arranged transversely to the vertical axis (A1); and a combustion gas exhaust conduit (7) arranged above the burner (4); the main heat exchanger (5) extending transversely to the vertical axis (A1) and being arranged above the burner (4) and below the combustion gas exhaust conduit (7) so that the combustion gases flow from the burner (4) through the main heat exchanger (5) toward the combustion gas exhaust conduit (7) in a direction substantially parallel to the vertical axis (A1); the main heat exchanger (5) having a number of pipes (17) and a plurality of fins (18); each fin (18) being provided with a plate (24) transversal to the pipes (17) and parallel to the vertical axis (A1) at least an offset portion (34) protruding from the plate (34) and parallel to the vertical axis (A1) so as to define a flow passage parallel to the vertical axis (A1) between the offset portion (34) and the plate (24), from which the offset portion (34) protrudes.
|
