Burner for a heater with improved fuel supply, improved heat shield and improved baffle plate

Burner for a heater, especially for use in motor vehicles, with

• an essentially axially symmetrical combustion chamber (22),
• a burner nozzle (12) for supply and atomization of fuel, which has a fuel needle (14) for supplying fuel to the combustion chamber (22) and a combustion air supply (16) for supplying combustion air to the combustion chamber,
• a starting zone (18) in which ignition of the fuel to start the burner takes place,
• a heat shield between the burner nozzle and the combustion chamber, the heat shield having openings for supplying secondary air to the combustion chamber, and
• a baffle plate which is located in the combustion chamber, wherein
• the inside diameter of the fuel needle (14) is sized to produce a predetermined exit speed of the fuel such that, during the starting phase of the burner (10), fuel in essentially unatomized form reaches the starting zone (18),
• the openings are equipped with air guide elements, and
• the baffle plate has a defined curvature in an axial direction.