Brændgas-luft-blandeindretning

摘要

The mixing device has a mixture nozzle (1) having an air duct (2) through which air is passed. A throttle portion (3) and the air duct are formed aerodynamically and cleanly such that continuous cross-sectional contraction portion (4) is formed in a cross-section between the air duct and the throttle portion. The throttle portion and the air duct are displaced relative to each other in air flow direction such that the cross section area in the region of contraction portion is extended continuously with the increasing reversible air flow rate, if combustible gas supply (5) is opened.