| 摘要 |
A gas-fired water heater is described, consisting of a fan (1), a pre-mixing device (2), a gas burner (3), a heat exchanger (4) and an exhaust gas heat exchanger (5). The gas-fired burner (3) works as an over-stoichiometric mixing burner and has a cooled burner plate (9), on the rear side, with a plurality of mixture passage openings (10). The heat exchanger (4) extends through two adjacent chambers (6,7) through which exhaust gas flows in opposite directions. The condensation heat exchanger (5) works in countercurrent and consists of star-shaped profiles through which heating water flows centrally and which are arranged vertically. The exhaust gas heat exchanger (5) and the pre-mixing device (2) run parallel to each other. <IMAGE> |
