Atmospheric gas-burner - has gap between nozzle and burner tube inside suction chamber supplied by fan with ambient air

摘要

The suction chamber (10) containing a gap (5) is shut off from the ambient air, being positively supplied with the latter by a fan (12). The fan output can be fixed and unregulated, or its speed can be adjustable. When stopped, its flow resistance can be small, so that if it fails air can still be drawn into the chamber. If this happens, a visual or acoustic signal can be emitted. ADVANTAGE - Reduces emission of nitrous oxide.