Heating device operated with liquid fuel

Abstract

In a heating device operated with liquid fuel, comprising a fuel pump ( 1 ) which includes a displacer member ( 2 ) and serves to suck the liquid fuel out of a tank ( 6 ) and feed it to a pressure conduit region ( 7, 9 ) in which an increased pressure defined by a pressure regulator ( 14 ) prevails and which further passes the fuel to an atomizer nozzle ( 10 ) from which it passes into a combustion chamber to form a burner flame ( 11 ), to avoid interruptions in operation it is provided that the pressure conduit region ( 7, 9 ) includes at least one additional volume ( 20, 22; 24, 26 ), the size of which is so selected that the pressure drop occurring in the pressure conduit region ( 7, 9 ) when gas bubbles are sucked in does not lead to an ongoing interruption in the fuel delivery by the fuel pump ( 1 ).

1 . A heating device operated with liquid fuel, comprising a fuel pump ( 1 ) which includes a displacer member ( 2 ) and serves to suck the liquid fuel out of a tank ( 6 ) and feed it to a pressure conduit region ( 7 ,  9 ) in which an increased pressure defined by a pressure regulator ( 14 ) prevails and which further passes the fuel to an atomizer nozzle ( 10 ) from which it passes into a combustion chamber to form a burner flame ( 11 ),
 wherein the pressure conduit region ( 7 ,  9 ) includes at least one additional volume ( 20 ,  22 ;  24 ,  26 ), the size of which is so selected that the pressure drop occurring in the pressure conduit region ( 7 ,  9 ) when gas bubbles are sucked in does not lead to a longer lasting interruption in the fuel delivery by the fuel pump ( 1 ).   
     
     
         2 . A heating device as set forth in  claim 1  wherein provided between the displacer member ( 2 ) of the fuel pump ( 1 ) and the atomizer nozzle ( 10 ) is a shut-off valve ( 8 ) for interrupting the feed of fuel to the atomizer nozzle ( 10 ), wherein the additional volume ( 20 ;  24 ) is provided between the displacer member ( 2 ) of the fuel pump ( 1 ) and the shut-off valve ( 8 ). 
     
     
         3 . A heating device as set forth in  claim 1  wherein provided between the displacer member ( 2 ) of the fuel pump ( 1 ) and the atomizer nozzle ( 10 ) is a shut-off valve ( 8 ) for interrupting the feed of fuel to the atomizer nozzle ( 10 ), wherein the additional volume ( 22 ;  26 ) is provided between the shut-off valve ( 8 ) and the atomizer nozzle ( 10 ). 
     
     
         4 . A heating device as set forth in  claim 1 , wherein at least a part of the additional volume ( 20 ,  22 ;  24 ,  26 ) is disposed in the interior of the fuel pump ( 1 ). 
     
     
         5 . A heating device as set forth in  claim 1 , wherein at least a part of the additional volume ( 24 ,  26 ) is in the form of a chamber which communicates with the pressure conduit region ( 7 ,  9 ) by way of a branch conduit ( 27 ,  29 ) and which is not arranged directly in the flow path leading from the displacer member ( 2 ) of the fuel pump ( 1 ) to the atomizer nozzle ( 10 ). 
     
     
         6 . A heating device as set forth in  claim 1 , wherein at least a part of the additional volume ( 20 ,  22 ) is in the form of an enlargement of conduits which are present in any case in the flow path leading from the displacer member ( 2 ) of the fuel pump ( 1 ) to the atomizer nozzle ( 10 ). 
     
     
         7 . A fuel pump ( 1 ) for a heating device as set forth in  claim 1 , wherein at least a part of the additional volume ( 20 ,  22 ;  24 ,  26 ) is arranged in the interior of the fuel pump ( 1 ). 
     
     
         8 . A fuel pump ( 1 ) as set forth in  claim 7  wherein the fuel pump is a gear fuel pump ( 1 ). 
     
     
         9 . A fuel pump ( 1 ) as set forth in  claim 7  which has a fuel pump cover ( 1 ) carrying a nozzle holder serving to hold the atomizer nozzle ( 10 ), wherein at least a part of the additional volume ( 20 ,  22 ;  24 ,  26 ) is provided in the fuel pump cover ( 1 ). 
     
     
         10 . A fuel pump ( 1 ) as set forth in  claim 7 , wherein at least a part of the additional volume ( 20 ,  22 ;  24 ,  26 ) is provided in the interior of the pump housing. 
     
     
         11 . A fuel pump ( 1 ) as set forth in  claim 9  wherein at least a part of the additional volume ( 22 ;  26 ) is provided in the nozzle holder.