Oven having an enclosed heat exchange zone

Abstract

An oven has an enclosed heat exchange zone for use with biomass fuel. The oven has a body which is able to be placed on the ground. The body has a combustion cabinet and an auxiliary equipment cabinet. The combustion cabinet has a burner received therein. The burner has a fire grate, a side plate, a blowing space, and a hearth. A heat exchange zone is defined by the surrounding tubular inner wall; a side heating zone being defined by a tubular inner and a tubular outer walls. A chimney is formed on the tubular outer wall in communication with an upper portion of the side heating zone. An opening is defined in the top of the combustion cabinet right above the tubular inner wall.

1 . An oven having an enclosed heat exchange zone for use with biomass fuel comprising:
 a body which is able to be placed on the ground, said body having a combustion cabinet and an auxiliary equipment cabinet,   said combustion cabinet having a burner received therein, said burner having a fire grate, a side plate extending upward from a peripheral of said fire grate, a blowing space beneath said fire grate, and a hearth defined by said fire grate and said surrounding side plate, a plurality of air vents being defined in said fire grate,   a heating portion being above said burner, said heating portion having a tubular inner wall and a tubular outer wall, a heat exchange zone being defined by said surrounding tubular inner wall, a side heating zone being defined by said tubular inner and said tubular outer walls, a plurality of flame vents being defined in a lower portion of said tubular inner wall near said burner, a chimney being formed on said tubular outer wall in communication with an upper portion of said side heating zone, an opening being defined in said top of said combustion cabinet right above said tubular inner wall,   said auxiliary equipment cabinet having a fuel supply mechanism and an electrical equipment received therein,   said fuel supply mechanism having a hopper, a fuel tube having one end in communication with said hopper and a free end extending into said hearth, and a rotary vane feeder rotatably received in said fuel tube,   said electrical equipment having a feeding motor driving said rotary vane feeder, an air blower for supplying air to said blowing space, a power supply, and a switch.   
     
     
         2 . The oven as claimed in  claim 1 , wherein a circular stage is defined in an inner surface of said tubular inner wall above said flame vents. 
     
     
         3 . The oven as claimed in  claim 1 , wherein an ignition bar window is defined in said fire gate, and said electrical equipment further has an ignition bar being installed in said blowing space, said ignition bar being exposed to said hearth through said ignition bar window and powered by said power supply. 
     
     
         4 . The oven as claimed in  claim 2 , wherein an ignition bar window is defined in said fire grate, and said electrical equipment farther has an ignition bar being installed in said blowing space, said ignition bar being exposed to said hearth through said ignition bar window and powered by said power supply.