Combustion chamber anti -backfire structure

The utility model relates to a combustion chamber anti -backfire structure, including combustion chamber casing, electric nozzle, fuel injector, fuel injector installs on the casing of combustion chamber, and electric nozzle installs before fuel injector and lies in the combustion chamber, fuel injector radially open and have the nozzle opening, form the ring cavity between fuel injector and the casing, the ring cavity is a variable cross -section structure, variable cross -section structure minimum at the cross sectional area who is lieing in electric nozzle terminal surface department for the ring cavity. The utility model discloses an improve in current structure, the simple preparation is feasible, and the effect is showing, and the effectual combustion efficiency that has guaranteed also that electric nozzle is not burnt out.