APPARATUS FOR CLEANING HEATING SURFACE Russian patent published in 1994 - IPC

FIELD: heat engineering. SUBSTANCE: apparatus has combustion chamber that is made of open cylindrical shell and whose both faces are plugged, exhaust nozzle, mixer provided with branch pipes for supplying gas and air, ignition chamber provided with ignitor, that operates periodically, and connected to the combustion chamber through perforated part of a flame duct wherein the exhaust nozzle is formed with edges of the shell. In addition the shell can be spiral. The apparatus is additionally provided with open cylindrical shell and open parts of the shells are axially alined opposite. The apparatus also has additional open spiral shell. Both shells are axially symmetric and their end parts are oppositely directed. The shell can be mounted for rotation with respect to longitudinal axis or lateral axis. EFFECT: simplified design, decreased sizes and metal consumption. 5 cl, 7 dwg