Variable pitch fuel supplier and an oven for use with the same

Abstract

An oven for use with a variable pitch fuel supplier and 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 and the auxiliary equipment cabinet has a fuel supplier and an electrical equipment received therein. The fuel supplier has a hopper, a fuel tube, and a rotary vane feeder rotatably received in the fuel tube. The electrical equipment has a power supply and a feeding motor driving the rotary vane feeder. Pitches vary larger from a tail end to a free end of the rotary vane feeder.

1 . An oven for use with a variable pitch fuel supplier and 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 auxiliary equipment cabinet having a fuel supplier and an electrical equipment received therein, said fuel supplier having a hopper, a fuel tube, and a rotary vane feeder rotatably received in said fuel tube, said electrical equipment having a power supply and a feeding motor driving said rotary vane feeder, said fuel tube being of cylindrical and having a feeding end in said auxiliary cabinet and a discharge end above said burner, said rotary vane feeder having a central shaft and a spiral vane spirally distributing around said central shaft, said central shaft having a tail end being coupled to said feeding motor and a free end at said discharge end of said fuel tube, pitches varying larger from said tail end to said free end.   
     
     
         2 . The oven as claimed in  claim 1 , wherein said spiral vane is two-stage type in which pitch “h 1 ” of said free end is equal and pitch “h 2 ” of said tail end is equal, but “h 1 ” is larger than “h 2 ”. 
     
     
         3 . The oven as claimed in  claim 1 , wherein pitch gradually varies larger and larger from said tail end to said free end. 
     
     
         4 . The oven as claimed in  claim 1 , wherein said electrical equipment further has an ignition bar, an air blower for supplying air to said burner, a switch and a power light. 
     
     
         5 . A variable pitch fuel supplier comprising:
 a hopper, a fuel tube, and a rotary vane feeder rotatably received in said fuel tube, said electrical equipment having a power supply and a feeding motor driving said rotary vane feeder, said fuel tube being of cylindrical and having a feeding end in said auxiliary cabinet and a discharge end above said burner, said rotary vane feeder having a central shaft and a spiral vane spirally distributing around said central shaft, said central shaft having a tail end being coupled to said feeding motor and a free end at said discharge end of said fuel tube, pitches varying larger from said tail end to said free end.   
     
     
         6 . The variable pitch fuel supplier as claimed in  claim 5 , wherein said spiral vane is two-stage type in which pitch “h 1 ” of said free end is equal and pitch “h 2 ” of said tail end is equal, but “h 1 ” is larger than “h 2 ”. 
     
     
         7 . The variable pitch fuel supplier as claimed in  claim 5 , wherein pitch gradually varies larger and larger from said tail end to said free end.