| 摘要 |
A premix burner, which may or may not be integrated into a light-metal cast heat exchanger (2) for a heating apparatus, in particular a central-heating boiler, wherein a water duct part (2) extends along the burner opening (3) in the burner opening (3) a labyrinth passage is defined by projections (7a, 7b) extending into the burner opening (3) and arranged with interspaces such that they define a narrow labyrinth passage for a combustible gas/air mixture in the burner opening. <IMAGE> |
