System for Controlling Combustion Air

Abstract

The object of the invention is to provide a system for controlling combustion air supply, in which the air supply to the primary and secondary air supply can be infinitely variable. The object is also to enable said system to be retrofitted in furnaces having a primary and a secondary air supply. To achieve this, a housing ( 1 ) having an internal, pot-shaped insert ( 5 ) provided with radial openings ( 9; 10 ) associated with either the primary air supply ( 7 ) or the secondary air supply ( 8 ) of the furnace is located between the furnace and the supply line for the combustion air, the cross-sections of said openings being infinitely variable via a pivotally mounted ( 17 ) motion link, the rotary angle of which is restricted by one or more stops ( 19 ). The motion link ( 17 ) is actuated by means of a drive unit ( 13 ) which in turn can be controlled by a control unit ( 23 ).

What is claimed is: 
     
         1 . System for controlling the combustion air supply in a solid fuel furnace which has a primary air supply and a secondary air supply which are connected to an air supply line characterized in that a housing ( 1 ) is arranged between said furnace and said air supply line that has an internal pot-shaped insert ( 5 ) that is provided with radial openings ( 9 ;
   10 ) which are assigned either to the primary air supply ( 7 ) or the secondary air supply ( 8 ) of the furnace and whose cross sections are infinitely variable by means of a pivotally mounted motion link ( 17 ), whose rotary angle is restricted by one or a plurality of stops ( 19 ), wherein the motion link ( 17 ) can be actuated by means of a drive unit ( 13 ) which can in turn be controlled by a control unit ( 23 ).   
     
     
         2 . System for controlling the combustion air supply according to  claim 1 , characterized in that closable openings ( 24 ) are located in the housing ( 1 ) for a defined addition of additional air into the primary air supply ( 7 ) and/or the secondary air supply ( 8 ). 
     
     
         3 . A controller for combustion air supply in a solid fuel furnace having a primary air supply and a secondary air supply connected to an air supply line, comprising:
 a housing disposed between said furnace and said air supply line, including an internal insert provided with openings assigned to said primary air supply and openings assigned to said secondary air supply;   a control unit;   a drive unit controlled by said control unit and connected to a motion link disposed to infinitely vary the cross-sections of said openings; and   a plurality of stops disposed to restrict the rotary angle of said motion link.   
     
     
         4 . A claim in accordance with  claim 3 , further comprising that said openings are radial openings provided in said housing. 
     
     
         5 . A claim in accordance with  claim 3 , wherein said internal insert is pot-shaped ( 5 ). 
     
     
         6 . A claim in accordance with  claim 3 , wherein the radial openings ( 9 ;  10 ) which are assigned either to the primary air supply ( 7 ) or the secondary air supply ( 8 ) of the furnace and whose cross sections are infinitely variable.