| 摘要 |
The invention relates to a heat exchanger intended, in particular, for a wall-mounted gas-fired boiler, comprising a primary exchanger (3) which is positioned on top of a burner (2), such that the burning gases pass through said primary exchanger from the bottom to the top, heating the water circulating therein. The upper part of said primary exchanger is covered with a lid (8) which is provided with a vent means (9). The invention also comprises a secondary condensation exchanger (4) consisting of a series of tubes (5) having a flattened section, through which the cold water flows towards the primary exchanger (3), and which are exposed externally to the hot gases. The secondary exchanger (4) is placed in a container (40) which is thus shaped and the flat tubes (5) are thus positioned such that the liquid condensates that form in the secondary exchanger (4) do not fall onto the primary exchanger (3) nor on the burner (2). The hot gases are drawn through the gaps that separate the flat tubes (5) by said vent means (9) via the openings (7) disposed in a lateral wall (43) of said container (40). The bottom of said container is inclined (42) in order to recover the condensates and to transfer them to a discharge opening (400). |
