Heating And Cleaning Apparatus For Surface Treatment

Abstract

A heat gun for cleaning and heat treating surfaces uses a lightweight jet engine to generate a hot blast of exhaust, with aggregate injectors in an engine jacket arranged over the jet engine admixing a cleaning medium with the hot exhaust. The cleaning medium admitted into the hot exhaust jet is discharged through an exhaust nozzle 1 directed at the item to be treated. The engine is controlled electronically and advanced on a lightweight frame 5, which may be fitted with a ballast weight 9 and spacer wheels 10, or be mounted on an advancing arrangement 8. The jet engine is powered by liquid fuel supplied from a tank 6. Intake air is cleaned and sound-damped in a filter unit 3. Combustion takes place at a high pressure and the exhaust discharged hot in a high velocity exhaust jet containing the cleaning media.

1 . A heat gun for the cleaning and heat treatment of surfaces comprises:
 a turbojet engine for generating a hot blast of exhaust through an exhaust nozzle ( 1 ); and,   an engine jacket ( 2 ) having an injector for admixture of a cleaning medium with the exhaust which are discharged through the exhaust nozzle ( 1 ).   
     
     
         2 . The heat gun according to  claim 1 , further comprising a lightweight frame for manual advance of the turbojet engine and engine jacket. 
     
     
         3 . The heat gun according to  claim 1 , further comprising two or more engine units ( 2 ) mounted together in an advancing arrangement ( 8 ). 
     
     
         4 . The heat gun according to  claim 1 , further comprising an air filter unit ( 3 ) for filtering intake air supplied to the turbojet engine. 
     
     
         5 . The heat gun according to  claim 1 , wherein the exhaust nozzle ( 1 ) is configured as a long narrow nozzle. 
     
     
         6 . The heat gun according to  claim 1 , wherein the exhaust nozzle ( 1 ) is configured as a short wide nozzle. 
     
     
         7 . The heat gun according to  claim 1 , further comprising an adjustable ballast weight ( 9 ), mounted to counteract a lifting force from discharge of the exhaust against the surface receiving the treatment. 
     
     
         8 . The heat gun according to  claim 1 , further comprising wheels ( 10 ) for supporting movement of the heat gun.