Wood Burning Stove with Wood Pellet Burner

Abstract

In a wood burning stove comprising a burning chamber ( 1 ) and a wood pellet burner ( 3 ), said wood pellet burner ( 3 ) is movable between a retracted position, in which the components of the wood pellet burner ( 3 ) are positioned outside the burning chamber ( 1 ), whereby the burning chamber ( 1 ) is suitable for burning wood logs etc., and an inserted position, in which the main components of the wood pellet burner ( 3 ) are positioned inside the burning chamber ( 1 ), and the wood pellet burner ( 3 ) can be activated to burn wood pellets ( 19 ) or similar particulate solid fuel inside the burning chamber ( 1 ).

1 . Wood burning stove comprising
 a burning chamber,   a wood pellet burner, said wood pellet burner being movable between   a retracted position, in which the components of the wood pellet burner are positioned outside the burning chamber, whereby the burning chamber is suitable for burning wood logs etc., and   an inserted position, in which the main components of the wood pellet burner are positioned inside the burning chamber, and the wood pellet burner can be activated to burn wood pellets or similar particulate solid fuel inside the burning chamber.   
     
     
         2 . Wood burning stove in accordance with  claim 1 , wherein the wood pellet burner is moved together with a wall section, such that the opening, through which the wood pellet burner is inserted into the burning chamber, is closed by said wall section when the wood pellet burner is in the retracted position. 
     
     
         3 . Wood burning stove in accordance with  claim 1 , wherein a further wall section is moved with the wood pellet burner for closing the opening behind the burner in the inserted position. 
     
     
         4 . Wood burning stove in accordance with  claim 1 , wherein the movement of the pellet burner is provided by means of a spindle driven by a motor. 
     
     
         5 . Wood burning stove in accordance with  claim 1 , wherein the supply of combustion air for the pellet burner comprises a fan delivering air via a flexible tube. 
     
     
         6 . Wood burning stove in accordance with  claim 1 , wherein the ignition of wood pellets is provided by means of a heat bulb positioned in the combustion air stream upstream of the fire pot. 
     
     
         7 . Wood burning stove in accordance with  claim 6 , wherein the heat bulb is positioned in a partial air stream separated from the main air stream by a separating wall. 
     
     
         8 . Wood burning stove in accordance with  claim 1 , wherein the supply of wood pellets to the fire pot is provided by means of a screw conveyor extracting the wood pellets from a wood pellet storage and delivering the wood pellets to a supply tube debouching above the fire pot. 
     
     
         9 . Wood burning stove in accordance with  claim 1 , wherein the control of the wood pellet burner is performed in dependence on sensors detecting temperatures in different positions inside and outside the wood burning stove and position sensors detecting the position of the moveable pellet burner, said control controlling any of the following:
 speed of pellet supply,   speed of combustion air fan,   insertion/retraction of wood pellet burner,   activation of heat bulb, etc.