Firing product feed device for furnaces with capacities less than 1 kW

A feed device for a granular firing product for a furnace with a capacity of less than 1 kW, comprising:

• a conveyor pipe;
• a conveyor screw disposed in said conveyor pipe;
• a central screw axis pipe having an outer wall with a volution mounted thereon and with said conveyor screw disposed in said conveyor pipe so that it is rotabable, said volution measuring at least a quarter of a diameter of said conveyor pipe, said central screw axis pipe being shaped as a cone at a tip of said central screw axis pipe, wherein a circular grating having a central circular hole and air feed openings on an outer region of said circular grating is horizontally disposed, the central circular hole being smaller in diameter than a diameter of said conveyor screw and wherein volution of said conveyor screw is conveyed in said circular grating until a level of the central circular hole and then ends in a vertical extension, which then projects over said circular grating;
• and,
• a conically expanding funnel-shaped wall is guided downwardly as a sliding wall for a firing product to be conveyed, said conically expanding funnel-shaped wall running substantially parallel to said cone of an upper end of said central screw axis pipe.