Solid fuel boiler

Abstract

The present invention relates to a solid fuel boiler, comprising a fire place with a burner, a flue gas passage with a flue gas outlet, an inlet for cold air, a convection space for heat exchange of cold air with the flue gas passage, and an outlet for hot air, wherein the flue gas passage comprises a tube kit with a plurality of tubes arranged adjacent to each other to create a flow space for air between the tubes, wherein at least one of said tubes is arranged so that it extends obliquely upwards in an acute angle in relation to the vertical line of the boiler from a lower attachment point to an upper attachment point.

1 . A solid fuel boiler, comprising a fire place with a burner, a flue gas passage with a flue gas outlet, an inlet for cold air, a convection space for heat exchange of cold air with the flue gas passage, and a boiler outlet for hot air, wherein the flue gas passage comprises a tube kit with a plurality of tubes arranged adjacent to each other to create a flow space for air between the tubes, wherein that at least one of said tubes is arranged so that it extends obliquely upwards in an angle a in relation to the vertical line L of the boiler from a lower attachment point to an upper attachment point. 
     
     
         2 . A solid fuel boiler according to  claim 1 , wherein that at least the main part of the tubes, preferably all tubes, are arranged so that they extend obliquely upwards, wherein the inlet and the outlet, respectively, of one tube are positioned along a line forming an acute angle in relation to the vertical line. 
     
     
         3 . A solid fuel boiler according to  claim 2 , wherein that said tubes are parallelly arranged and preferably are essentially straight tubes. 
     
     
         4 . A solid fuel boiler according to  claim 2 , wherein that said tubes are arranged in several rows in a displaced manner, whereby the hot air as to its main flow direction is forced to turn to and fro through the tube kit. 
     
     
         5 . A solid fuel boiler according to  claim 1 , wherein that the fire place is arranged at the bottom with its centre displaced towards a first side wall of the boiler, and that the flue gas outlet is arranged at the top, close to, or inside, a, in relation to said first side wall, opposite, second side wall of the boiler. 
     
     
         6 . A solid fuel boiler according to  claim 1 , wherein that the convection space is provided with at least one partition wall which is arranged to force the air flow essentially across the tube kit. 
     
     
         7 . A solid fuel boiler according to  claim 6 , wherein that said partition wall is arranged in such a manner that the air flow is forced to cross the tube kit at least twice. 
     
     
         8 . A solid fuel boiler according to  claim 1 , wherein that the air flow before its exit through the boiler outlet passes at least one passage having at least one wall, the opposite side of which is a delimitation of the fire place. 
     
     
         9 . A solid fuel boiler according to  claim 1 , wherein that the boiler outlet for hot air is arranged in the lower half of the boiler in level with said fire place. 
     
     
         10 . A solid fuel boiler according to  claim 1 , wherein that the boiler is provided with an essentially parallel-epipedic housing, wherein the height essentially exceeds the width and the depth, preferably h>d>b. 
     
     
         11 . A solid fuel boiler, comprising a fire place with a burner, a flue gas passage with a flue gas outlet, an inlet for cold air, a convection space for heat exchange of cold air with the flue gas passage, and an boiler outlet for hot air, wherein the flue gas passage comprises a tube kit with a plurality of tubes arranged adjacent to each other to create a flow space for air between the tubes, wherein at least one of said tubes is arranged so that it extends obliquely upwards in an angle in relation to the vertical line L of the boiler from a lower attachment point to an upper attachment point, and wherein said convection space is provided with at least one partition wall which is arranged to force the air flow essentially across the tube kit in such a manner that the air flow is forced to cross the tube kit at least twice. 
     
     
         12 . A solid fuel boiler according to  claim 11 , wherein the boiler outlet for hot air is arranged in the lower half of the boiler in level with said fire place. 
     
     
         13 . A solid fuel boiler, comprising a fire place with a burner, a flue gas passage with a flue gas outlet, an inlet for cold air, a convection space for heat exchange of cold air with the flue gas passage, and an boiler outlet for hot air, wherein the flue gas passage comprises a tube kit with a plurality of tubes arranged adjacent to each other to create a flow space for air between the tubes, wherein at least one of said tubes is arranged so that it extends obliquely upwards in an angle in relation to the vertical line L of the boiler from a lower attachment point to an upper attachment point, and wherein said convection space is provided with at least one partition wall which is arranged to force the air flow essentially across the tube kit in such a manner that the air flow is forced to cross the tube kit at least twice, the boiler outlet for hot air is arranged in the lower half of the boiler in level with said fire place and the channels that connect the outlet opening of convection space with the boiler outlet, extend obliquely downwards, whereby the hot air flow is forced across the upper part of the fire place prior to exit via said boiler outlet.